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[PATCH net-next v1 0/7] devmem TCP fixes

by Mina Almasry

A few unrelated devmem TCP fixes bundled in a series for some convenience (if that's ok). Patch 1-2: fix naming and provide page_pool_alloc_netmem for fragged netmem. Patch 3-4: fix issues with dma-buf dma addresses being potentially passed to dma_sync_for_* helpers. Patch 5-6: fix syzbot SO_DEVMEM_DONTNEED issue and add test for this case. Mina Almasry (6): net: page_pool: rename page_pool_alloc_netmem to *_netmems net: page_pool: create page_pool_alloc_netmem page_pool: disable sync for cpu for dmabuf memory provider netmem: add netmem_prefetch net: fix SO_DEVMEM_DONTNEED looping too long ncdevmem: add test for too many token_count Samiullah Khawaja (1): page_pool: Set `dma_sync` to false for devmem memory provider include/net/netmem.h | 7 ++++ include/net/page_pool/helpers.h | 50 ++++++++++++++++++-------- include/net/page_pool/types.h | 2 +- net/core/devmem.c | 9 +++-- net/core/page_pool.c | 11 +++--- net/core/sock.c | 46 ++++++++++++++---------- tools/testing/selftests/net/ncdevmem.c | 11 ++++++ 7 files changed, 93 insertions(+), 43 deletions(-) -- 2.47.0.163.g1226f6d8fa-goog

7 months, 3 weeks

3
9
0 0

[PATCH v6 00/10] iommufd: Add vIOMMU infrastructure (Part-2: vDEVICE)

by Nicolin Chen

Following the previous vIOMMU series, this adds another vDEVICE structure, representing the association from an iommufd_device to an iommufd_viommu. This gives the whole architecture a new "v" layer: _______________________________________________________________________ | iommufd (with vIOMMU/vDEVICE) | | _____________ _____________ | | | | | | | | |----------------| vIOMMU |<---| vDEVICE |<------| | | | | | |_____________| | | | | ______ | | _____________ ___|____ | | | | | | | | | | | | | | | IOAS |<---|(HWPT_PAGING)|<---| HWPT_NESTED |<--| DEVICE | | | | |______| |_____________| |_____________| |________| | |______|________|______________|__________________|_______________|_____| | | | | | ______v_____ | ______v_____ ______v_____ ___v__ | struct | | PFN | (paging) | | (nested) | |struct| |iommu_device| |------>|iommu_domain|<----|iommu_domain|<----|device| |____________| storage|____________| |____________| |______| This vDEVICE object is used to collect and store all vIOMMU-related device information/attributes in a VM. As an initial series for vDEVICE, add only the virt_id to the vDEVICE, which is a vIOMMU specific device ID in a VM: e.g. vSID of ARM SMMUv3, vDeviceID of AMD IOMMU, and vRID of Intel VT-d to a Context Table. This virt_id helps IOMMU drivers to link the vID to a pID of the device against the physical IOMMU instance. This is essential for a vIOMMU-based invalidation, where the request contains a device's vID for a device cache flush, e.g. ATC invalidation. Therefore, with this vDEVICE object, support a vIOMMU-based invalidation, by reusing IOMMUFD_CMD_HWPT_INVALIDATE for a vIOMMU object to flush cache with a given driver data. As for the implementation of the series, add driver support in ARM SMMUv3 for a real world use case. This series is on Github: https://github.com/nicolinc/iommufd/commits/iommufd_viommu_p2-v6 (QEMU branch for testing will be provided in Jason's nesting series) Changelog v6 * Fixed kdoc in the uAPI header * Fixed indentations in iommufd.rst * Replaced vdev->idev with vdev->dev * Added "Reviewed-by" from Kevin and Jason * Updated kdoc of struct iommu_vdevice_alloc * Fixed lockdep function call in iommufd_viommu_find_dev * Added missing iommu_dev validation between viommu and idev * Skipped SMMUv3 driver changes (to post in a separate series) * Replaced !cache_invalidate_user in WARN_ON of the allocation path with cache_invalidate_user validation in iommufd_hwpt_invalidate v5 https://lore.kernel.org/all/cover.1729897278.git.nicolinc@nvidia.com/ * Dropped driver-allocated vDEVICE support * Changed vdev_to_dev helper to iommufd_viommu_find_dev v4 https://lore.kernel.org/all/cover.1729555967.git.nicolinc@nvidia.com/ * Added missing brackets in switch-case * Fixed the unreleased idev refcount issue * Reworked the iommufd_vdevice_alloc allocator * Dropped support for IOMMU_VIOMMU_TYPE_DEFAULT * Added missing TEST_LENGTH and fail_nth coverages * Added a verification to the driver-allocated vDEVICE object * Added an iommufd_vdevice_abort for a missing mutex protection * Added a u64 structure arm_vsmmu_invalidation_cmd for user command conversion v3 https://lore.kernel.org/all/cover.1728491532.git.nicolinc@nvidia.com/ * Added Jason's Reviewed-by * Split this invalidation part out of the part-1 series * Repurposed VDEV_ID ioctl to a wider vDEVICE structure and ioctl * Reduced viommu_api functions by allowing drivers to access viommu and vdevice structure directly * Dropped vdevs_rwsem by using xa_lock instead * Dropped arm_smmu_cache_invalidate_user v2 https://lore.kernel.org/all/cover.1724776335.git.nicolinc@nvidia.com/ * Limited vdev_id to one per idev * Added a rw_sem to protect the vdev_id list * Reworked driver-level APIs with proper lockings * Added a new viommu_api file for IOMMUFD_DRIVER config * Dropped useless iommu_dev point from the viommu structure * Added missing index numnbers to new types in the uAPI header * Dropped IOMMU_VIOMMU_INVALIDATE uAPI; Instead, reuse the HWPT one * Reworked mock_viommu_cache_invalidate() using the new iommu helper * Reordered details of set/unset_vdev_id handlers for proper lockings v1 https://lore.kernel.org/all/cover.1723061377.git.nicolinc@nvidia.com/ Thanks! Nicolin Jason Gunthorpe (1): iommu: Add iommu_copy_struct_from_full_user_array helper Nicolin Chen (9): iommufd/viommu: Add IOMMUFD_OBJ_VDEVICE and IOMMU_VDEVICE_ALLOC ioctl iommufd/selftest: Add IOMMU_VDEVICE_ALLOC test coverage iommu/viommu: Add cache_invalidate to iommufd_viommu_ops iommufd: Allow hwpt_id to carry viommu_id for IOMMU_HWPT_INVALIDATE iommufd/viommu: Add iommufd_viommu_find_dev helper iommufd/selftest: Add mock_viommu_cache_invalidate iommufd/selftest: Add IOMMU_TEST_OP_DEV_CHECK_CACHE test command iommufd/selftest: Add vIOMMU coverage for IOMMU_HWPT_INVALIDATE ioctl Documentation: userspace-api: iommufd: Update vDEVICE drivers/iommu/iommufd/iommufd_private.h | 18 ++ drivers/iommu/iommufd/iommufd_test.h | 30 +++ include/linux/iommu.h | 48 ++++- include/linux/iommufd.h | 22 ++ include/uapi/linux/iommufd.h | 31 ++- tools/testing/selftests/iommu/iommufd_utils.h | 83 +++++++ drivers/iommu/iommufd/driver.c | 13 ++ drivers/iommu/iommufd/hw_pagetable.c | 40 +++- drivers/iommu/iommufd/main.c | 6 + drivers/iommu/iommufd/selftest.c | 98 ++++++++- drivers/iommu/iommufd/viommu.c | 76 +++++++ tools/testing/selftests/iommu/iommufd.c | 204 +++++++++++++++++- .../selftests/iommu/iommufd_fail_nth.c | 4 + Documentation/userspace-api/iommufd.rst | 41 +++- 14 files changed, 688 insertions(+), 26 deletions(-) -- 2.43.0

7 months, 3 weeks

4
25
0 0

[PATCH v6 00/13] iommufd: Add vIOMMU infrastructure (Part-1)

by Nicolin Chen

This series introduces a new vIOMMU infrastructure and related ioctls. IOMMUFD has been using the HWPT infrastructure for all cases, including a nested IO page table support. Yet, there're limitations for an HWPT-based structure to support some advanced HW-accelerated features, such as CMDQV on NVIDIA Grace, and HW-accelerated vIOMMU on AMD. Even for a multi-IOMMU environment, it is not straightforward for nested HWPTs to share the same parent HWPT (stage-2 IO pagetable), with the HWPT infrastructure alone: a parent HWPT typically hold one stage-2 IO pagetable and tag it with only one ID in the cache entries. When sharing one large stage-2 IO pagetable across physical IOMMU instances, that one ID may not always be available across all the IOMMU instances. In other word, it's ideal for SW to have a different container for the stage-2 IO pagetable so it can hold another ID that's available. And this container will be able to hold some advanced feature too. For this "different container", add vIOMMU, an additional layer to hold extra virtualization information: _______________________________________________________________________ | iommufd (with vIOMMU) | | _____________ | | | | | | |----------------| vIOMMU | | | | ______ | | _____________ ________ | | | | | | | | | | | | | | | IOAS |<---|(HWPT_PAGING)|<---| HWPT_NESTED |<--| DEVICE | | | | |______| |_____________| |_____________| |________| | | | | | | | | |______|________|______________|__________________|_______________|_____| | | | | | ______v_____ | ______v_____ ______v_____ ___v__ | struct | | PFN | (paging) | | (nested) | |struct| |iommu_device| |------>|iommu_domain|<----|iommu_domain|<----|device| |____________| storage|____________| |____________| |______| The vIOMMU object should be seen as a slice of a physical IOMMU instance that is passed to or shared with a VM. That can be some HW/SW resources: - Security namespace for guest owned ID, e.g. guest-controlled cache tags - Non-device-affiliated event reporting, e.g. invalidation queue errors - Access to a sharable nesting parent pagetable across physical IOMMUs - Virtualization of various platforms IDs, e.g. RIDs and others - Delivery of paravirtualized invalidation - Direct assigned invalidation queues - Direct assigned interrupts On a multi-IOMMU system, the vIOMMU object must be instanced to the number of the physical IOMMUs that have a slice passed to (via device) a guest VM, while being able to hold the shareable parent HWPT. Each vIOMMU then just needs to allocate its own individual ID to tag its own cache: ---------------------------- ---------------- | | paging_hwpt0 | | hwpt_nested0 |--->| viommu0 ------------------ ---------------- | | IDx | ---------------------------- ---------------------------- ---------------- | | paging_hwpt0 | | hwpt_nested1 |--->| viommu1 ------------------ ---------------- | | IDy | ---------------------------- As an initial part-1, add IOMMUFD_CMD_VIOMMU_ALLOC ioctl for an allocation only. More vIOMMU-based structs and ioctls will be introduced in the follow-up series to support vDEVICE, vIRQ (vEVENT) and vQUEUE objects. Although we repurposed the vIOMMU object from an earlier RFC, just for a referece: https://lore.kernel.org/all/cover.1712978212.git.nicolinc@nvidia.com/ This series is on Github: https://github.com/nicolinc/iommufd/commits/iommufd_viommu_p1-v6 (QEMU branch for testing will be provided in Jason's nesting series) Changelog v6 * Improved comment lines * Added a TEST_F for IO page fault * Fixed indentations in iommufd.rst * Revised kdoc of the viommu_alloc op * Added "Reviewed-by" from Kevin and Jason * Passed in "flags" to ->alloc_domain_nested * Renamed "free" op to "destroy" in viommu_ops * Skipped SMMUv3 driver changes (to post in a separate series) * Fixed "flags" validation in iommufd_viommu_alloc_hwpt_nested * Added CONFIG_IOMMUFD_DRIVER_CORE for sharing between iommufd core and IOMMU dirvers * Replaced iommufd_verify_unfinalized_object with xa_cmpxchg in iommufd_object_finalize/abort functions v5 https://lore.kernel.org/all/cover.1729897352.git.nicolinc@nvidia.com/ * Added "Reviewed-by" from Kevin * Reworked iommufd_viommu_alloc helper * Revised the uAPI kdoc for vIOMMU object * Revised comments for pluggable iommu_dev * Added a couple of cleanup patches for selftest * Renamed domain_alloc_nested op to alloc_domain_nested * Updated a few commit messages to reflect the latest series * Renamed iommufd_hwpt_nested_alloc_for_viommu to iommufd_viommu_alloc_hwpt_nested, and added flag validation v4 https://lore.kernel.org/all/cover.1729553811.git.nicolinc@nvidia.com/ * Added "Reviewed-by" from Jason * Dropped IOMMU_VIOMMU_TYPE_DEFAULT support * Dropped iommufd_object_alloc_elm renamings * Renamed iommufd's viommu_api.c to driver.c * Reworked iommufd_viommu_alloc helper * Added a separate iommufd_hwpt_nested_alloc_for_viommu function for hwpt_nested allocations on a vIOMMU, and added comparison between viommu->iommu_dev->ops and dev_iommu_ops(idev->dev) * Replaced s2_parent with vsmmu in arm_smmu_nested_domain * Replaced domain_alloc_user in iommu_ops with domain_alloc_nested in viommu_ops * Replaced wait_queue_head_t with a completion, to delay the unplug of mock_iommu_dev * Corrected documentation graph that was missing struct iommu_device * Added an iommufd_verify_unfinalized_object helper to verify driver- allocated vIOMMU/vDEVICE objects * Added missing test cases for TEST_LENGTH and fail_nth v3 https://lore.kernel.org/all/cover.1728491453.git.nicolinc@nvidia.com/ * Rebased on top of Jason's nesting v3 series https://lore.kernel.org/all/0-v3-e2e16cd7467f+2a6a1-smmuv3_nesting_jgg@nvid… * Split the series into smaller parts * Added Jason's Reviewed-by * Added back viommu->iommu_dev * Added support for driver-allocated vIOMMU v.s. core-allocated * Dropped arm_smmu_cache_invalidate_user * Added an iommufd_test_wait_for_users() in selftest * Reworked test code to make viommu an individual FIXTURE * Added missing TEST_LENGTH case for the new ioctl command v2 https://lore.kernel.org/all/cover.1724776335.git.nicolinc@nvidia.com/ * Limited vdev_id to one per idev * Added a rw_sem to protect the vdev_id list * Reworked driver-level APIs with proper lockings * Added a new viommu_api file for IOMMUFD_DRIVER config * Dropped useless iommu_dev point from the viommu structure * Added missing index numnbers to new types in the uAPI header * Dropped IOMMU_VIOMMU_INVALIDATE uAPI; Instead, reuse the HWPT one * Reworked mock_viommu_cache_invalidate() using the new iommu helper * Reordered details of set/unset_vdev_id handlers for proper lockings v1 https://lore.kernel.org/all/cover.1723061377.git.nicolinc@nvidia.com/ Thanks! Nicolin Nicolin Chen (13): iommufd: Move struct iommufd_object to public iommufd header iommufd: Move _iommufd_object_alloc helper to a sharable file iommufd: Introduce IOMMUFD_OBJ_VIOMMU and its related struct iommufd: Verify object in iommufd_object_finalize/abort() iommufd/viommu: Add IOMMU_VIOMMU_ALLOC ioctl iommufd: Add alloc_domain_nested op to iommufd_viommu_ops iommufd: Allow pt_id to carry viommu_id for IOMMU_HWPT_ALLOC iommufd/selftest: Add container_of helpers iommufd/selftest: Prepare for mock_viommu_alloc_domain_nested() iommufd/selftest: Add refcount to mock_iommu_device iommufd/selftest: Add IOMMU_VIOMMU_TYPE_SELFTEST iommufd/selftest: Add IOMMU_VIOMMU_ALLOC test coverage Documentation: userspace-api: iommufd: Update vIOMMU drivers/iommu/iommufd/Kconfig | 5 + drivers/iommu/iommufd/Makefile | 8 +- drivers/iommu/iommufd/iommufd_private.h | 33 +-- drivers/iommu/iommufd/iommufd_test.h | 2 + include/linux/iommu.h | 14 + include/linux/iommufd.h | 83 ++++++ include/uapi/linux/iommufd.h | 54 +++- tools/testing/selftests/iommu/iommufd_utils.h | 28 ++ drivers/iommu/iommufd/driver.c | 40 +++ drivers/iommu/iommufd/hw_pagetable.c | 72 ++++- drivers/iommu/iommufd/main.c | 54 ++-- drivers/iommu/iommufd/selftest.c | 266 +++++++++++++----- drivers/iommu/iommufd/viommu.c | 81 ++++++ tools/testing/selftests/iommu/iommufd.c | 128 +++++++++ .../selftests/iommu/iommufd_fail_nth.c | 11 + Documentation/userspace-api/iommufd.rst | 69 ++++- 16 files changed, 795 insertions(+), 153 deletions(-) create mode 100644 drivers/iommu/iommufd/driver.c create mode 100644 drivers/iommu/iommufd/viommu.c -- 2.43.0

7 months, 3 weeks

3
23
0 0

[PATCH v2 0/2] kselftest/arm64: fp-stress signal delivery interval improvements

by Mark Brown

One of the things that fp-stress does to stress the floating point context switching is send signals to the test threads it spawns. Currently we do this once per second but as suggested by Mark Rutland if we increase this we can improve the chances of triggering any issues with context switching the signal handling code. Do a quick change to increase the rate of signal delivery, trying to avoid excessive impact on emulated platforms, and a further change to mitigate the impact that this creates during startup. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v2: - Minor clarifications in commit message and log output. - Link to v1: https://lore.kernel.org/r/20241029-arm64-fp-stress-interval-v1-0-db540abf6d… --- Mark Brown (2): kselftest/arm64: Increase frequency of signal delivery in fp-stress kselftest/arm64: Poll less often while waiting for fp-stress children tools/testing/selftests/arm64/fp/fp-stress.c | 28 +++++++++++++++++----------- 1 file changed, 17 insertions(+), 11 deletions(-) --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241028-arm64-fp-stress-interval-8f5e62c06e12 Best regards, -- Mark Brown <broonie(a)kernel.org>

7 months, 3 weeks

3
4
0 0

[PATCH bpf-next 1/2] libbpf: Add missing per-arch include path

by Björn Töpel

From: Björn Töpel <bjorn(a)rivosinc.com> libbpf does not include the per-arch tools include path, e.g. tools/arch/riscv/include. Some architectures depend those files to build properly. Include tools/arch/$(SUBARCH)/include in the libbpf build. Fixes: 6d74d178fe6e ("tools: Add riscv barrier implementation") Signed-off-by: Björn Töpel <bjorn(a)rivosinc.com> --- tools/lib/bpf/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile index 1b22f0f37288..857a5f7b413d 100644 --- a/tools/lib/bpf/Makefile +++ b/tools/lib/bpf/Makefile @@ -61,7 +61,8 @@ ifndef VERBOSE endif INCLUDES = -I$(or $(OUTPUT),.) \ - -I$(srctree)/tools/include -I$(srctree)/tools/include/uapi + -I$(srctree)/tools/include -I$(srctree)/tools/include/uapi \ + -I$(srctree)/tools/arch/$(SRCARCH)/include export prefix libdir src obj base-commit: db5ca265e3334b48c4e3fa07eef79e8bc578c430 -- 2.43.0

7 months, 3 weeks

5
11
0 0

[PATCH net-next v9] net: ipv4: Cache pmtu for all packet paths if multipath enabled

by Vladimir Vdovin

Check number of paths by fib_info_num_path(), and update_or_create_fnhe() for every path. Problem is that pmtu is cached only for the oif that has received icmp message "need to frag", other oifs will still try to use "default" iface mtu. An example topology showing the problem: | host1 +---------+ | dummy0 | 10.179.20.18/32 mtu9000 +---------+ +-----------+----------------+ +---------+ +---------+ | ens17f0 | 10.179.2.141/31 | ens17f1 | 10.179.2.13/31 +---------+ +---------+ | (all here have mtu 9000) | +------+ +------+ | ro1 | 10.179.2.140/31 | ro2 | 10.179.2.12/31 +------+ +------+ | | ---------+------------+-------------------+------ | +-----+ | ro3 | 10.10.10.10 mtu1500 +-----+ | ======================================== some networks ======================================== | +-----+ | eth0| 10.10.30.30 mtu9000 +-----+ | host2 host1 have enabled multipath and sysctl net.ipv4.fib_multipath_hash_policy = 1: default proto static src 10.179.20.18 nexthop via 10.179.2.12 dev ens17f1 weight 1 nexthop via 10.179.2.140 dev ens17f0 weight 1 When host1 tries to do pmtud from 10.179.20.18/32 to host2, host1 receives at ens17f1 iface an icmp packet from ro3 that ro3 mtu=1500. And host1 caches it in nexthop exceptions cache. Problem is that it is cached only for the iface that has received icmp, and there is no way that ro3 will send icmp msg to host1 via another path. Host1 now have this routes to host2: ip r g 10.10.30.30 sport 30000 dport 443 10.10.30.30 via 10.179.2.12 dev ens17f1 src 10.179.20.18 uid 0 cache expires 521sec mtu 1500 ip r g 10.10.30.30 sport 30033 dport 443 10.10.30.30 via 10.179.2.140 dev ens17f0 src 10.179.20.18 uid 0 cache So when host1 tries again to reach host2 with mtu>1500, if packet flow is lucky enough to be hashed with oif=ens17f1 its ok, if oif=ens17f0 it blackholes and still gets icmp msgs from ro3 to ens17f1, until lucky day when ro3 will send it through another flow to ens17f0. Signed-off-by: Vladimir Vdovin <deliran(a)verdict.gg> --- V9: selftests in pmtu.sh: - remove useless return - fix mtu var override V8: selftests in pmtu.sh: - Change var names from "dummy" to "host" - Fix errors caused by incorrect iface arguments pass - Add src addr to setup_multipath_new - Change multipath* func order - Change route_get_dst_exception() && route_get_dst_pmtu_from_exception() and arguments pass where they are used as Ido suggested in https://lore.kernel.org/all/ZykH_fdcMBdFgXix@shredder/ V7: selftest in pmtu.sh: - add setup_multipath() with old and new nh tests - add global "dummy_v4" addr variables - add documentation - remove dummy netdev usage in mp nh test - remove useless sysctl opts in mp nh test V6: - make commit message cleaner V5: - make self test cleaner V4: - fix selftest, do route lookup before checking cached exceptions V3: - add selftest - fix compile error V2: - fix fib_info_num_path parameter pass --- net/ipv4/route.c | 13 ++++ tools/testing/selftests/net/pmtu.sh | 117 ++++++++++++++++++++++++---- 2 files changed, 113 insertions(+), 17 deletions(-) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 723ac9181558..652f603d29fe 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1027,6 +1027,19 @@ static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu) struct fib_nh_common *nhc; fib_select_path(net, &res, fl4, NULL); +#ifdef CONFIG_IP_ROUTE_MULTIPATH + if (fib_info_num_path(res.fi) > 1) { + int nhsel; + + for (nhsel = 0; nhsel < fib_info_num_path(res.fi); nhsel++) { + nhc = fib_info_nhc(res.fi, nhsel); + update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, + jiffies + net->ipv4.ip_rt_mtu_expires); + } + rcu_read_unlock(); + return; + } +#endif /* CONFIG_IP_ROUTE_MULTIPATH */ nhc = FIB_RES_NHC(res); update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, jiffies + net->ipv4.ip_rt_mtu_expires); diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh index 569bce8b6383..611ae7862f46 100755 --- a/tools/testing/selftests/net/pmtu.sh +++ b/tools/testing/selftests/net/pmtu.sh @@ -197,6 +197,12 @@ # # - pmtu_ipv6_route_change # Same as above but with IPv6 +# +# - pmtu_ipv4_mp_exceptions +# Use the same topology as in pmtu_ipv4, but add routeable addresses +# on host A and B on lo reachable via both routers. Host A and B +# addresses have multipath routes to each other, b_r1 mtu = 1500. +# Check that PMTU exceptions are created for both paths. source lib.sh source net_helper.sh @@ -266,7 +272,8 @@ tests=" list_flush_ipv4_exception ipv4: list and flush cached exceptions 1 list_flush_ipv6_exception ipv6: list and flush cached exceptions 1 pmtu_ipv4_route_change ipv4: PMTU exception w/route replace 1 - pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1" + pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1 + pmtu_ipv4_mp_exceptions ipv4: PMTU multipath nh exceptions 1" # Addressing and routing for tests with routers: four network segments, with # index SEGMENT between 1 and 4, a common prefix (PREFIX4 or PREFIX6) and an @@ -343,6 +350,9 @@ tunnel6_a_addr="fd00:2::a" tunnel6_b_addr="fd00:2::b" tunnel6_mask="64" +host4_a_addr="192.168.99.99" +host4_b_addr="192.168.88.88" + dummy6_0_prefix="fc00:1000::" dummy6_1_prefix="fc00:1001::" dummy6_mask="64" @@ -984,6 +994,52 @@ setup_ovs_bridge() { run_cmd ip route add ${prefix6}:${b_r1}::1 via ${prefix6}:${a_r1}::2 } +setup_multipath_new() { + # Set up host A with multipath routes to host B host4_b_addr + run_cmd ${ns_a} ip addr add ${host4_a_addr} dev lo + run_cmd ${ns_a} ip nexthop add id 401 via ${prefix4}.${a_r1}.2 dev veth_A-R1 + run_cmd ${ns_a} ip nexthop add id 402 via ${prefix4}.${a_r2}.2 dev veth_A-R2 + run_cmd ${ns_a} ip nexthop add id 403 group 401/402 + run_cmd ${ns_a} ip route add ${host4_b_addr} src ${host4_a_addr} nhid 403 + + # Set up host B with multipath routes to host A host4_a_addr + run_cmd ${ns_b} ip addr add ${host4_b_addr} dev lo + run_cmd ${ns_b} ip nexthop add id 401 via ${prefix4}.${b_r1}.2 dev veth_B-R1 + run_cmd ${ns_b} ip nexthop add id 402 via ${prefix4}.${b_r2}.2 dev veth_B-R2 + run_cmd ${ns_b} ip nexthop add id 403 group 401/402 + run_cmd ${ns_b} ip route add ${host4_a_addr} src ${host4_b_addr} nhid 403 +} + +setup_multipath_old() { + # Set up host A with multipath routes to host B host4_b_addr + run_cmd ${ns_a} ip addr add ${host4_a_addr} dev lo + run_cmd ${ns_a} ip route add ${host4_b_addr} \ + src ${host4_a_addr} \ + nexthop via ${prefix4}.${a_r1}.2 weight 1 \ + nexthop via ${prefix4}.${a_r2}.2 weight 1 + + # Set up host B with multipath routes to host A host4_a_addr + run_cmd ${ns_b} ip addr add ${host4_b_addr} dev lo + run_cmd ${ns_b} ip route add ${host4_a_addr} \ + src ${host4_b_addr} \ + nexthop via ${prefix4}.${b_r1}.2 weight 1 \ + nexthop via ${prefix4}.${b_r2}.2 weight 1 +} + +setup_multipath() { + if [ "$USE_NH" = "yes" ]; then + setup_multipath_new + else + setup_multipath_old + fi + + # Set up routers with routes to dummies + run_cmd ${ns_r1} ip route add ${host4_a_addr} via ${prefix4}.${a_r1}.1 + run_cmd ${ns_r2} ip route add ${host4_a_addr} via ${prefix4}.${a_r2}.1 + run_cmd ${ns_r1} ip route add ${host4_b_addr} via ${prefix4}.${b_r1}.1 + run_cmd ${ns_r2} ip route add ${host4_b_addr} via ${prefix4}.${b_r2}.1 +} + setup() { [ "$(id -u)" -ne 0 ] && echo " need to run as root" && return $ksft_skip @@ -1076,23 +1132,15 @@ link_get_mtu() { } route_get_dst_exception() { - ns_cmd="${1}" - dst="${2}" - dsfield="${3}" - - if [ -z "${dsfield}" ]; then - dsfield=0 - fi + ns_cmd="${1}"; shift - ${ns_cmd} ip route get "${dst}" dsfield "${dsfield}" + ${ns_cmd} ip route get "$@" } route_get_dst_pmtu_from_exception() { - ns_cmd="${1}" - dst="${2}" - dsfield="${3}" + ns_cmd="${1}"; shift - mtu_parse "$(route_get_dst_exception "${ns_cmd}" "${dst}" "${dsfield}")" + mtu_parse "$(route_get_dst_exception "${ns_cmd}" "$@")" } check_pmtu_value() { @@ -1235,10 +1283,10 @@ test_pmtu_ipv4_dscp_icmp_exception() { run_cmd "${ns_a}" ping -q -M want -Q "${dsfield}" -c 1 -w 1 -s "${len}" "${dst2}" # Check that exceptions have been created with the correct PMTU - pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" "${policy_mark}")" + pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" dsfield "${policy_mark}")" check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 - pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" "${policy_mark}")" + pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" dsfield "${policy_mark}")" check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 } @@ -1285,9 +1333,9 @@ test_pmtu_ipv4_dscp_udp_exception() { UDP:"${dst2}":50000,tos="${dsfield}" # Check that exceptions have been created with the correct PMTU - pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" "${policy_mark}")" + pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" dsfield "${policy_mark}")" check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 - pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" "${policy_mark}")" + pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" dsfield "${policy_mark}")" check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 } @@ -2329,6 +2377,41 @@ test_pmtu_ipv6_route_change() { test_pmtu_ipvX_route_change 6 } +test_pmtu_ipv4_mp_exceptions() { + setup namespaces routing multipath || return $ksft_skip + + trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ + "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ + "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ + "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 + + # Set up initial MTU values + mtu "${ns_a}" veth_A-R1 2000 + mtu "${ns_r1}" veth_R1-A 2000 + mtu "${ns_r1}" veth_R1-B 1500 + mtu "${ns_b}" veth_B-R1 1500 + + mtu "${ns_a}" veth_A-R2 2000 + mtu "${ns_r2}" veth_R2-A 2000 + mtu "${ns_r2}" veth_R2-B 1500 + mtu "${ns_b}" veth_B-R2 1500 + + fail=0 + + # Ping and expect two nexthop exceptions for two routes in nh group + run_cmd ${ns_a} ping -q -M want -i 0.1 -c 1 -s 1800 "${host4_b_addr}" + + # Do route lookup before checking cached exceptions. + # The following commands are needed for dst entries to be cached + # in both paths exceptions and therefore dumped to user space + # Check that exceptions have been created with the correct PMTU + pmtu_a_R1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${host4_b_addr}" oif veth_A-R1)" + pmtu_a_R2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${host4_b_addr}" oif veth_A-R2)" + + check_pmtu_value "1500" "${pmtu_a_R1}" "exceeding MTU (veth_A-R2)" || return 1 + check_pmtu_value "1500" "${pmtu_a_R2}" "exceeding MTU (veth_A-R1)" || return 1 +} + usage() { echo echo "$0 [OPTIONS] [TEST]..." base-commit: 66600fac7a984dea4ae095411f644770b2561ede -- 2.43.5

7 months, 3 weeks

2
1
0 0

[PATCH net-next v8] net: ipv4: Cache pmtu for all packet paths if multipath enabled

by Vladimir Vdovin

Check number of paths by fib_info_num_path(), and update_or_create_fnhe() for every path. Problem is that pmtu is cached only for the oif that has received icmp message "need to frag", other oifs will still try to use "default" iface mtu. An example topology showing the problem: | host1 +---------+ | dummy0 | 10.179.20.18/32 mtu9000 +---------+ +-----------+----------------+ +---------+ +---------+ | ens17f0 | 10.179.2.141/31 | ens17f1 | 10.179.2.13/31 +---------+ +---------+ | (all here have mtu 9000) | +------+ +------+ | ro1 | 10.179.2.140/31 | ro2 | 10.179.2.12/31 +------+ +------+ | | ---------+------------+-------------------+------ | +-----+ | ro3 | 10.10.10.10 mtu1500 +-----+ | ======================================== some networks ======================================== | +-----+ | eth0| 10.10.30.30 mtu9000 +-----+ | host2 host1 have enabled multipath and sysctl net.ipv4.fib_multipath_hash_policy = 1: default proto static src 10.179.20.18 nexthop via 10.179.2.12 dev ens17f1 weight 1 nexthop via 10.179.2.140 dev ens17f0 weight 1 When host1 tries to do pmtud from 10.179.20.18/32 to host2, host1 receives at ens17f1 iface an icmp packet from ro3 that ro3 mtu=1500. And host1 caches it in nexthop exceptions cache. Problem is that it is cached only for the iface that has received icmp, and there is no way that ro3 will send icmp msg to host1 via another path. Host1 now have this routes to host2: ip r g 10.10.30.30 sport 30000 dport 443 10.10.30.30 via 10.179.2.12 dev ens17f1 src 10.179.20.18 uid 0 cache expires 521sec mtu 1500 ip r g 10.10.30.30 sport 30033 dport 443 10.10.30.30 via 10.179.2.140 dev ens17f0 src 10.179.20.18 uid 0 cache So when host1 tries again to reach host2 with mtu>1500, if packet flow is lucky enough to be hashed with oif=ens17f1 its ok, if oif=ens17f0 it blackholes and still gets icmp msgs from ro3 to ens17f1, until lucky day when ro3 will send it through another flow to ens17f0. Signed-off-by: Vladimir Vdovin <deliran(a)verdict.gg> --- V8: selftests in pmtu.sh: - Change var names from "dummy" to "host" - Fix errors caused by incorrect iface arguments pass - Add src addr to setup_multipath_new - Change multipath* func order - Change route_get_dst_exception() && route_get_dst_pmtu_from_exception() and arguments pass where they are used as Ido suggested in https://lore.kernel.org/all/ZykH_fdcMBdFgXix@shredder/ V7: selftest in pmtu.sh: - add setup_multipath() with old and new nh tests - add global "dummy_v4" addr variables - add documentation - remove dummy netdev usage in mp nh test - remove useless sysctl opts in mp nh test V6: - make commit message cleaner V5: - make self test cleaner V4: - fix selftest, do route lookup before checking cached exceptions V3: - add selftest - fix compile error V2: - fix fib_info_num_path parameter pass --- net/ipv4/route.c | 13 +++ tools/testing/selftests/net/pmtu.sh | 119 ++++++++++++++++++++++++---- 2 files changed, 115 insertions(+), 17 deletions(-) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 723ac9181558..652f603d29fe 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1027,6 +1027,19 @@ static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu) struct fib_nh_common *nhc; fib_select_path(net, &res, fl4, NULL); +#ifdef CONFIG_IP_ROUTE_MULTIPATH + if (fib_info_num_path(res.fi) > 1) { + int nhsel; + + for (nhsel = 0; nhsel < fib_info_num_path(res.fi); nhsel++) { + nhc = fib_info_nhc(res.fi, nhsel); + update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, + jiffies + net->ipv4.ip_rt_mtu_expires); + } + rcu_read_unlock(); + return; + } +#endif /* CONFIG_IP_ROUTE_MULTIPATH */ nhc = FIB_RES_NHC(res); update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, jiffies + net->ipv4.ip_rt_mtu_expires); diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh index 569bce8b6383..2b79a16d3369 100755 --- a/tools/testing/selftests/net/pmtu.sh +++ b/tools/testing/selftests/net/pmtu.sh @@ -197,6 +197,12 @@ # # - pmtu_ipv6_route_change # Same as above but with IPv6 +# +# - pmtu_ipv4_mp_exceptions +# Use the same topology as in pmtu_ipv4, but add routeable addresses +# on host A and B on lo reachable via both routers. Host A and B +# addresses have multipath routes to each other, b_r1 mtu = 1500. +# Check that PMTU exceptions are created for both paths. source lib.sh source net_helper.sh @@ -266,7 +272,8 @@ tests=" list_flush_ipv4_exception ipv4: list and flush cached exceptions 1 list_flush_ipv6_exception ipv6: list and flush cached exceptions 1 pmtu_ipv4_route_change ipv4: PMTU exception w/route replace 1 - pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1" + pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1 + pmtu_ipv4_mp_exceptions ipv4: PMTU multipath nh exceptions 1" # Addressing and routing for tests with routers: four network segments, with # index SEGMENT between 1 and 4, a common prefix (PREFIX4 or PREFIX6) and an @@ -343,6 +350,9 @@ tunnel6_a_addr="fd00:2::a" tunnel6_b_addr="fd00:2::b" tunnel6_mask="64" +host4_a_addr="192.168.99.99" +host4_b_addr="192.168.88.88" + dummy6_0_prefix="fc00:1000::" dummy6_1_prefix="fc00:1001::" dummy6_mask="64" @@ -984,6 +994,52 @@ setup_ovs_bridge() { run_cmd ip route add ${prefix6}:${b_r1}::1 via ${prefix6}:${a_r1}::2 } +setup_multipath_new() { + # Set up host A with multipath routes to host B host4_b_addr + run_cmd ${ns_a} ip addr add ${host4_a_addr} dev lo + run_cmd ${ns_a} ip nexthop add id 401 via ${prefix4}.${a_r1}.2 dev veth_A-R1 + run_cmd ${ns_a} ip nexthop add id 402 via ${prefix4}.${a_r2}.2 dev veth_A-R2 + run_cmd ${ns_a} ip nexthop add id 403 group 401/402 + run_cmd ${ns_a} ip route add ${host4_b_addr} src ${host4_a_addr} nhid 403 + + # Set up host B with multipath routes to host A host4_a_addr + run_cmd ${ns_b} ip addr add ${host4_b_addr} dev lo + run_cmd ${ns_b} ip nexthop add id 401 via ${prefix4}.${b_r1}.2 dev veth_B-R1 + run_cmd ${ns_b} ip nexthop add id 402 via ${prefix4}.${b_r2}.2 dev veth_B-R2 + run_cmd ${ns_b} ip nexthop add id 403 group 401/402 + run_cmd ${ns_b} ip route add ${host4_a_addr} src ${host4_b_addr} nhid 403 +} + +setup_multipath_old() { + # Set up host A with multipath routes to host B host4_b_addr + run_cmd ${ns_a} ip addr add ${host4_a_addr} dev lo + run_cmd ${ns_a} ip route add ${host4_b_addr} \ + src ${host4_a_addr} \ + nexthop via ${prefix4}.${a_r1}.2 weight 1 \ + nexthop via ${prefix4}.${a_r2}.2 weight 1 + + # Set up host B with multipath routes to host A host4_a_addr + run_cmd ${ns_b} ip addr add ${host4_b_addr} dev lo + run_cmd ${ns_b} ip route add ${host4_a_addr} \ + src ${host4_b_addr} \ + nexthop via ${prefix4}.${b_r1}.2 weight 1 \ + nexthop via ${prefix4}.${b_r2}.2 weight 1 +} + +setup_multipath() { + if [ "$USE_NH" = "yes" ]; then + setup_multipath_new + else + setup_multipath_old + fi + + # Set up routers with routes to dummies + run_cmd ${ns_r1} ip route add ${host4_a_addr} via ${prefix4}.${a_r1}.1 + run_cmd ${ns_r2} ip route add ${host4_a_addr} via ${prefix4}.${a_r2}.1 + run_cmd ${ns_r1} ip route add ${host4_b_addr} via ${prefix4}.${b_r1}.1 + run_cmd ${ns_r2} ip route add ${host4_b_addr} via ${prefix4}.${b_r2}.1 +} + setup() { [ "$(id -u)" -ne 0 ] && echo " need to run as root" && return $ksft_skip @@ -1076,23 +1132,15 @@ link_get_mtu() { } route_get_dst_exception() { - ns_cmd="${1}" - dst="${2}" - dsfield="${3}" - - if [ -z "${dsfield}" ]; then - dsfield=0 - fi + ns_cmd="${1}"; shift - ${ns_cmd} ip route get "${dst}" dsfield "${dsfield}" + ${ns_cmd} ip route get "$@" } route_get_dst_pmtu_from_exception() { - ns_cmd="${1}" - dst="${2}" - dsfield="${3}" + ns_cmd="${1}"; shift - mtu_parse "$(route_get_dst_exception "${ns_cmd}" "${dst}" "${dsfield}")" + mtu_parse "$(route_get_dst_exception "${ns_cmd}" "$@")" } check_pmtu_value() { @@ -1235,10 +1283,10 @@ test_pmtu_ipv4_dscp_icmp_exception() { run_cmd "${ns_a}" ping -q -M want -Q "${dsfield}" -c 1 -w 1 -s "${len}" "${dst2}" # Check that exceptions have been created with the correct PMTU - pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" "${policy_mark}")" + pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" dsfield "${policy_mark}")" check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 - pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" "${policy_mark}")" + pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" dsfield "${policy_mark}")" check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 } @@ -1285,9 +1333,9 @@ test_pmtu_ipv4_dscp_udp_exception() { UDP:"${dst2}":50000,tos="${dsfield}" # Check that exceptions have been created with the correct PMTU - pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" "${policy_mark}")" + pmtu_1="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst1}" dsfield "${policy_mark}")" check_pmtu_value "1400" "${pmtu_1}" "exceeding MTU" || return 1 - pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" "${policy_mark}")" + pmtu_2="$(route_get_dst_pmtu_from_exception "${ns_a}" "${dst2}" dsfield "${policy_mark}")" check_pmtu_value "1500" "${pmtu_2}" "exceeding MTU" || return 1 } @@ -2329,6 +2377,43 @@ test_pmtu_ipv6_route_change() { test_pmtu_ipvX_route_change 6 } +test_pmtu_ipv4_mp_exceptions() { + setup namespaces routing multipath || return $ksft_skip + + trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ + "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ + "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ + "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 + + # Set up initial MTU values + mtu "${ns_a}" veth_A-R1 2000 + mtu "${ns_r1}" veth_R1-A 2000 + mtu "${ns_r1}" veth_R1-B 1500 + mtu "${ns_b}" veth_B-R1 1500 + + mtu "${ns_a}" veth_A-R2 2000 + mtu "${ns_r2}" veth_R2-A 2000 + mtu "${ns_r2}" veth_R2-B 1500 + mtu "${ns_b}" veth_B-R2 1500 + + fail=0 + + # Ping and expect two nexthop exceptions for two routes in nh group + run_cmd ${ns_a} ping -q -M want -i 0.1 -c 1 -s 1800 "${host4_b_addr}" + + # Do route lookup before checking cached exceptions. + # The following commands are needed for dst entries to be cached + # in both paths exceptions and therefore dumped to user space + # Check that exceptions have been created with the correct PMTU + pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" "${host4_b_addr}" oif veth_A-R1)" + pmtu="$(route_get_dst_pmtu_from_exception "${ns_a}" "${host4_b_addr}" oif veth_A-R2)" + + check_pmtu_value "1500" "${pmtu}" "exceeding MTU (veth_A-R2)" || return 1 + check_pmtu_value "1500" "${pmtu}" "exceeding MTU (veth_A-R1)" || return 1 + + return ${fail} +} + usage() { echo echo "$0 [OPTIONS] [TEST]..." base-commit: 66600fac7a984dea4ae095411f644770b2561ede -- 2.43.5

7 months, 3 weeks

3
3
0 0

[PATCH] selftests: vDSO: Do not rely on $ARCH for vdso_test_getrandom && vdso_test_chacha

by Christophe Leroy

$ARCH is not always enough to know whether getrandom vDSO is supported or not. For instance on x86 we want it for x86_64 but not i386. On the other hand, we already have detailed architecture selection in vdso_config.h, the only difference is that it cannot be used for Makefile. But most selftests are built regardless of whether a functionality is supported or not. The return value KSFT_SKIP is there for than: it tells the test is skipped because it is not supported. Make the implementation more flexible by setting a VDSO_GETRANDOM macro in vdso_config.h. That macro contains the path to the file that defines __arch_chacha20_blocks_nostack(). It avoids the symbolic link to vdso directory and will allow architectures to have several implementations of __arch_chacha20_blocks_nostack() if needed. Then restore the original behaviour which was dedicated to vdso_standalone_test_x86 and build getrandom and chacha tests all the time just like other vDSO selftests and return SKIP when the functionality to be tested is not implemented. This has the advantage of doing architecture specific selection at only one place. Also change vdso_test_getrandom to return SKIP instead of FAIL when vDSO function is not found, just like vdso_test_getcpu or vdso_test_gettimeofday. Signed-off-by: Christophe Leroy <christophe.leroy(a)csgroup.eu> --- Based on latest random tree (0dfed8092247) tools/arch/x86/vdso | 1 - tools/testing/selftests/vDSO/Makefile | 10 ++++------ tools/testing/selftests/vDSO/vdso_config.h | 3 +++ tools/testing/selftests/vDSO/vdso_test_chacha-asm.S | 7 +++++++ tools/testing/selftests/vDSO/vdso_test_chacha.c | 11 +++++++++++ tools/testing/selftests/vDSO/vdso_test_getrandom.c | 2 +- 6 files changed, 26 insertions(+), 8 deletions(-) delete mode 120000 tools/arch/x86/vdso create mode 100644 tools/testing/selftests/vDSO/vdso_test_chacha-asm.S diff --git a/tools/arch/x86/vdso b/tools/arch/x86/vdso deleted file mode 120000 index 7eb962fd3454..000000000000 --- a/tools/arch/x86/vdso +++ /dev/null @@ -1 +0,0 @@ -../../../arch/x86/entry/vdso/ \ No newline at end of file diff --git a/tools/testing/selftests/vDSO/Makefile b/tools/testing/selftests/vDSO/Makefile index 5ead6b1f0478..cfb7c281b22c 100644 --- a/tools/testing/selftests/vDSO/Makefile +++ b/tools/testing/selftests/vDSO/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 -ARCH ?= $(shell uname -m | sed -e s/i.86/x86/) -SRCARCH := $(subst x86_64,x86,$(ARCH)) +uname_M := $(shell uname -m 2>/dev/null || echo not) +ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/) TEST_GEN_PROGS := vdso_test_gettimeofday TEST_GEN_PROGS += vdso_test_getcpu @@ -10,10 +10,8 @@ ifeq ($(ARCH),$(filter $(ARCH),x86 x86_64)) TEST_GEN_PROGS += vdso_standalone_test_x86 endif TEST_GEN_PROGS += vdso_test_correctness -ifeq ($(ARCH),$(filter $(ARCH),x86_64)) TEST_GEN_PROGS += vdso_test_getrandom TEST_GEN_PROGS += vdso_test_chacha -endif CFLAGS := -std=gnu99 @@ -38,8 +36,8 @@ $(OUTPUT)/vdso_test_getrandom: CFLAGS += -isystem $(top_srcdir)/tools/include \ $(KHDR_INCLUDES) \ -isystem $(top_srcdir)/include/uapi -$(OUTPUT)/vdso_test_chacha: $(top_srcdir)/tools/arch/$(SRCARCH)/vdso/vgetrandom-chacha.S +$(OUTPUT)/vdso_test_chacha: vdso_test_chacha-asm.S $(OUTPUT)/vdso_test_chacha: CFLAGS += -idirafter $(top_srcdir)/tools/include \ - -idirafter $(top_srcdir)/arch/$(SRCARCH)/include \ + -idirafter $(top_srcdir)/arch/$(ARCH)/include \ -idirafter $(top_srcdir)/include \ -D__ASSEMBLY__ -Wa,--noexecstack diff --git a/tools/testing/selftests/vDSO/vdso_config.h b/tools/testing/selftests/vDSO/vdso_config.h index 740ce8c98d2e..693920471160 100644 --- a/tools/testing/selftests/vDSO/vdso_config.h +++ b/tools/testing/selftests/vDSO/vdso_config.h @@ -47,6 +47,7 @@ #elif defined(__x86_64__) #define VDSO_VERSION 0 #define VDSO_NAMES 1 +#define VDSO_GETRANDOM "../../../../arch/x86/entry/vdso/vgetrandom-chacha.S" #elif defined(__riscv__) || defined(__riscv) #define VDSO_VERSION 5 #define VDSO_NAMES 1 @@ -58,6 +59,7 @@ #define VDSO_NAMES 1 #endif +#ifndef __ASSEMBLY__ static const char *versions[7] = { "LINUX_2.6", "LINUX_2.6.15", @@ -88,5 +90,6 @@ static const char *names[2][7] = { "__vdso_getrandom", }, }; +#endif #endif /* __VDSO_CONFIG_H__ */ diff --git a/tools/testing/selftests/vDSO/vdso_test_chacha-asm.S b/tools/testing/selftests/vDSO/vdso_test_chacha-asm.S new file mode 100644 index 000000000000..8e704165f6f2 --- /dev/null +++ b/tools/testing/selftests/vDSO/vdso_test_chacha-asm.S @@ -0,0 +1,7 @@ +#include "vdso_config.h" + +#ifdef VDSO_GETRANDOM + +#include VDSO_GETRANDOM + +#endif diff --git a/tools/testing/selftests/vDSO/vdso_test_chacha.c b/tools/testing/selftests/vDSO/vdso_test_chacha.c index 3a5a08d857cf..9d18d49a82f8 100644 --- a/tools/testing/selftests/vDSO/vdso_test_chacha.c +++ b/tools/testing/selftests/vDSO/vdso_test_chacha.c @@ -8,6 +8,8 @@ #include <string.h> #include <stdint.h> #include <stdbool.h> +#include <linux/kconfig.h> +#include "vdso_config.h" #include "../kselftest.h" static uint32_t rol32(uint32_t word, unsigned int shift) @@ -57,6 +59,10 @@ typedef uint32_t u32; typedef uint64_t u64; #include <vdso/getrandom.h> +#ifdef VDSO_GETRANDOM +#define HAVE_VDSO_GETRANDOM 1 +#endif + int main(int argc, char *argv[]) { enum { TRIALS = 1000, BLOCKS = 128, BLOCK_SIZE = 64 }; @@ -68,6 +74,11 @@ int main(int argc, char *argv[]) ksft_print_header(); ksft_set_plan(1); + if (!__is_defined(HAVE_VDSO_GETRANDOM)) { + printf("__arch_chacha20_blocks_nostack() not implemented\n"); + return KSFT_SKIP; + } + for (unsigned int trial = 0; trial < TRIALS; ++trial) { if (getrandom(key, sizeof(key), 0) != sizeof(key)) { printf("getrandom() failed!\n"); diff --git a/tools/testing/selftests/vDSO/vdso_test_getrandom.c b/tools/testing/selftests/vDSO/vdso_test_getrandom.c index 8866b65a4605..47ee94b32617 100644 --- a/tools/testing/selftests/vDSO/vdso_test_getrandom.c +++ b/tools/testing/selftests/vDSO/vdso_test_getrandom.c @@ -115,7 +115,7 @@ static void vgetrandom_init(void) vgrnd.fn = (__typeof__(vgrnd.fn))vdso_sym(version, name); if (!vgrnd.fn) { printf("%s is missing!\n", name); - exit(KSFT_FAIL); + exit(KSFT_SKIP); } ret = VDSO_CALL(vgrnd.fn, 5, NULL, 0, 0, &vgrnd.params, ~0UL); if (ret == -ENOSYS) { -- 2.44.0

7 months, 3 weeks

5
15
0 0

[PATCH net-next] selftests: wireguards: use nft by default

by Hangbin Liu

Use nft by default if it's supported, as nft is the replacement for iptables, which is used by default in some releases. Additionally, iptables is dropped in some releases. Signed-off-by: Hangbin Liu <liuhangbin(a)gmail.com> --- CC nft developers to see if there are any easier configurations, as I'm not very familiar with nft commands. --- tools/testing/selftests/wireguard/netns.sh | 63 ++++++++++++++++++---- 1 file changed, 53 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/wireguard/netns.sh b/tools/testing/selftests/wireguard/netns.sh index 405ff262ca93..4e29c1a7003c 100755 --- a/tools/testing/selftests/wireguard/netns.sh +++ b/tools/testing/selftests/wireguard/netns.sh @@ -44,6 +44,7 @@ sleep() { read -t "$1" -N 1 || true; } waitiperf() { pretty "${1//*-}" "wait for iperf:${3:-5201} pid $2"; while [[ $(ss -N "$1" -tlpH "sport = ${3:-5201}") != *\"iperf3\",pid=$2,fd=* ]]; do sleep 0.1; done; } waitncatudp() { pretty "${1//*-}" "wait for udp:1111 pid $2"; while [[ $(ss -N "$1" -ulpH 'sport = 1111') != *\"ncat\",pid=$2,fd=* ]]; do sleep 0.1; done; } waitiface() { pretty "${1//*-}" "wait for $2 to come up"; ip netns exec "$1" bash -c "while [[ \$(< \"/sys/class/net/$2/operstate\") != up ]]; do read -t .1 -N 0 || true; done;"; } +use_nft() { nft --version &> /dev/null; } cleanup() { set +e @@ -196,13 +197,23 @@ ip1 link set wg0 mtu 1300 ip2 link set wg0 mtu 1300 n1 wg set wg0 peer "$pub2" endpoint 127.0.0.1:2 n2 wg set wg0 peer "$pub1" endpoint 127.0.0.1:1 -n0 iptables -A INPUT -m length --length 1360 -j DROP +if use_nft; then + n0 nft add table inet filter + n0 nft add chain inet filter INPUT { type filter hook input priority filter \; policy accept \; } + n0 nft add rule inet filter INPUT meta length 1360 counter drop +else + n0 iptables -A INPUT -m length --length 1360 -j DROP +fi n1 ip route add 192.168.241.2/32 dev wg0 mtu 1299 n2 ip route add 192.168.241.1/32 dev wg0 mtu 1299 n2 ping -c 1 -W 1 -s 1269 192.168.241.1 n2 ip route delete 192.168.241.1/32 dev wg0 mtu 1299 n1 ip route delete 192.168.241.2/32 dev wg0 mtu 1299 -n0 iptables -F INPUT +if use_nft; then + n0 nft delete table inet filter +else + n0 iptables -F INPUT +fi ip1 link set wg0 mtu $orig_mtu ip2 link set wg0 mtu $orig_mtu @@ -334,7 +345,13 @@ waitiface $netns2 veths n0 bash -c 'printf 1 > /proc/sys/net/ipv4/ip_forward' n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout' n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout_stream' -n0 iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -d 10.0.0.0/24 -j SNAT --to 10.0.0.1 +if use_nft; then + n0 nft add table inet nat + n0 nft add chain inet nat POSTROUTING { type nat hook postrouting priority srcnat\; policy accept \; } + n0 nft add rule inet nat POSTROUTING ip saddr 192.168.1.0/24 ip daddr 10.0.0.0/24 counter snat to 10.0.0.1 +else + n0 iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -d 10.0.0.0/24 -j SNAT --to 10.0.0.1 +fi n1 wg set wg0 peer "$pub2" endpoint 10.0.0.100:2 persistent-keepalive 1 n1 ping -W 1 -c 1 192.168.241.2 @@ -348,10 +365,20 @@ n1 wg set wg0 peer "$pub2" persistent-keepalive 0 # Test that sk_bound_dev_if works n1 ping -I wg0 -c 1 -W 1 192.168.241.2 # What about when the mark changes and the packet must be rerouted? -n1 iptables -t mangle -I OUTPUT -j MARK --set-xmark 1 +if use_nft; then + n1 nft add table inet mangle + n1 nft add chain inet mangle OUTPUT { type route hook output priority mangle\; policy accept \; } + n1 nft add rule inet mangle OUTPUT counter meta mark set 0x1 +else + n1 iptables -t mangle -I OUTPUT -j MARK --set-xmark 1 +fi n1 ping -c 1 -W 1 192.168.241.2 # First the boring case n1 ping -I wg0 -c 1 -W 1 192.168.241.2 # Then the sk_bound_dev_if case -n1 iptables -t mangle -D OUTPUT -j MARK --set-xmark 1 +if use_nft; then + n1 nft delete table inet mangle +else + n1 iptables -t mangle -D OUTPUT -j MARK --set-xmark 1 +fi # Test that onion routing works, even when it loops n1 wg set wg0 peer "$pub3" allowed-ips 192.168.242.2/32 endpoint 192.168.241.2:5 @@ -385,16 +412,32 @@ n1 ping -W 1 -c 100 -f 192.168.99.7 n1 ping -W 1 -c 100 -f abab::1111 # Have ns2 NAT into wg0 packets from ns0, but return an icmp error along the right route. -n2 iptables -t nat -A POSTROUTING -s 10.0.0.0/24 -d 192.168.241.0/24 -j SNAT --to 192.168.241.2 -n0 iptables -t filter -A INPUT \! -s 10.0.0.0/24 -i vethrs -j DROP # Manual rpfilter just to be explicit. +if use_nft; then + n2 nft add table inet nat + n2 nft add chain inet nat POSTROUTING { type nat hook postrouting priority srcnat\; policy accept \; } + n2 nft add rule inet nat POSTROUTING ip saddr 10.0.0.0/24 ip daddr 192.168.241.0/24 counter snat to 192.168.241.2 + + n0 nft add table inet filter + n0 nft add chain inet filter INPUT { type filter hook input priority filter \; policy accept \; } + n0 nft add rule inet filter INPUT iifname "vethrs" ip saddr != 10.0.0.0/24 counter drop +else + n2 iptables -t nat -A POSTROUTING -s 10.0.0.0/24 -d 192.168.241.0/24 -j SNAT --to 192.168.241.2 + n0 iptables -t filter -A INPUT \! -s 10.0.0.0/24 -i vethrs -j DROP # Manual rpfilter just to be explicit. +fi n2 bash -c 'printf 1 > /proc/sys/net/ipv4/ip_forward' ip0 -4 route add 192.168.241.1 via 10.0.0.100 n2 wg set wg0 peer "$pub1" remove [[ $(! n0 ping -W 1 -c 1 192.168.241.1 || false) == *"From 10.0.0.100 icmp_seq=1 Destination Host Unreachable"* ]] -n0 iptables -t nat -F -n0 iptables -t filter -F -n2 iptables -t nat -F +if use_nft; then + n0 nft delete table inet nat + n0 nft delete table inet filter + n2 nft delete table inet nat +else + n0 iptables -t nat -F + n0 iptables -t filter -F + n2 iptables -t nat -F +fi ip0 link del vethrc ip0 link del vethrs ip1 link del wg0 -- 2.46.0

7 months, 3 weeks

2
1
0 0

[PATCH v2 net-next 0/2] ipv6: fix hangup on device removal

by Paolo Abeni

This addresses the infamous unregister_netdevice splat in net selftests; the actual fix is carried by the first patch, while the 2nd one addresses a related problem in the relevant test that was patially hiding the problem. Targeting net-next as the issue is quite old and I feel a little lost in the fib info/nh jungle. --- v1 -> v2: - drop unintended whitespace change in patch 1/2 Paolo Abeni (2): ipv6: release nexthop on device removal selftests: net: really check for bg process completion net/ipv6/route.c | 6 +++--- tools/testing/selftests/net/pmtu.sh | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) -- 2.45.2

7 months, 3 weeks

4
7
0 0

[PATCH v4 0/2] kselftest: tmpfs: Add ksft macros and skip if no root

by Shivam Chaudhary

This version 4 patch series replace direct error handling methods with ksft macros, which provide better reporting.Currently, when the tmpfs test runs, it does not display any output if it passes,and if it fails (particularly when not run as root),it simply exits without any warning or message. This series of patch adds: 1. Add 'ksft_print_header()' and 'ksft_set_plan()' to structure test outputs more effectively. 2. Skip if not run as root. 3. Replace direct error handling with 'ksft_test_result_*', 'ksft_print_msg' and KSFT_SKIP macros for better reporting. v3->v4: - Start a patchset - Split patch into smaller pathes to make it easy to review. Patch1 Replace 'ksft_test_result_skip' with 'KSFT_SKIP' during root run check. Patch2 Replace 'ksft_test_result_fail' with 'KSFT_SKIP' where fail does not make sense, or failure could be due to not unsupported APIs with appropriate warnings. v3: https://lore.kernel.org/all/20241028185756.111832-1-cvam0000@gmail.com/ v2->v3: - Remove extra ksft_set_plan() - Remove function for unshare() - Fix the comment style v2: https://lore.kernel.org/all/20241026191621.2860376-1-cvam0000@gmail.com/ v1->v2: - Make the commit message more clear. v1: https://lore.kernel.org/all/20241024200228.1075840-1-cvam0000@gmail.com/T/#u thanks Shivam Shivam Chaudhary (2): selftests:tmpfs: Add Skip test if not run as root selftests:tmpfs: Add kselftest support to tmpfs .../selftests/tmpfs/bug-link-o-tmpfile.c | 79 +++++++++++++++---- 1 file changed, 62 insertions(+), 17 deletions(-) -- 2.45.2

7 months, 3 weeks

2
4
0 0

[PATCH net-next v7] net: ipv4: Cache pmtu for all packet paths if multipath enabled

by Vladimir Vdovin

Check number of paths by fib_info_num_path(), and update_or_create_fnhe() for every path. Problem is that pmtu is cached only for the oif that has received icmp message "need to frag", other oifs will still try to use "default" iface mtu. An example topology showing the problem: | host1 +---------+ | dummy0 | 10.179.20.18/32 mtu9000 +---------+ +-----------+----------------+ +---------+ +---------+ | ens17f0 | 10.179.2.141/31 | ens17f1 | 10.179.2.13/31 +---------+ +---------+ | (all here have mtu 9000) | +------+ +------+ | ro1 | 10.179.2.140/31 | ro2 | 10.179.2.12/31 +------+ +------+ | | ---------+------------+-------------------+------ | +-----+ | ro3 | 10.10.10.10 mtu1500 +-----+ | ======================================== some networks ======================================== | +-----+ | eth0| 10.10.30.30 mtu9000 +-----+ | host2 host1 have enabled multipath and sysctl net.ipv4.fib_multipath_hash_policy = 1: default proto static src 10.179.20.18 nexthop via 10.179.2.12 dev ens17f1 weight 1 nexthop via 10.179.2.140 dev ens17f0 weight 1 When host1 tries to do pmtud from 10.179.20.18/32 to host2, host1 receives at ens17f1 iface an icmp packet from ro3 that ro3 mtu=1500. And host1 caches it in nexthop exceptions cache. Problem is that it is cached only for the iface that has received icmp, and there is no way that ro3 will send icmp msg to host1 via another path. Host1 now have this routes to host2: ip r g 10.10.30.30 sport 30000 dport 443 10.10.30.30 via 10.179.2.12 dev ens17f1 src 10.179.20.18 uid 0 cache expires 521sec mtu 1500 ip r g 10.10.30.30 sport 30033 dport 443 10.10.30.30 via 10.179.2.140 dev ens17f0 src 10.179.20.18 uid 0 cache So when host1 tries again to reach host2 with mtu>1500, if packet flow is lucky enough to be hashed with oif=ens17f1 its ok, if oif=ens17f0 it blackholes and still gets icmp msgs from ro3 to ens17f1, until lucky day when ro3 will send it through another flow to ens17f0. Signed-off-by: Vladimir Vdovin <deliran(a)verdict.gg> --- V7: selftest in pmtu.sh: - add setup_multipath() with old and new nh tests - add global "dummy_v4" addr variables - add documentation - remove dummy netdev usage in mp nh test - remove useless sysctl opts in mp nh test V6: - make commit message cleaner V5: - make self test cleaner V4: - fix selftest, do route lookup before checking cached exceptions V3: - add selftest - fix compile error V2: - fix fib_info_num_path parameter pass --- net/ipv4/route.c | 13 ++++ tools/testing/selftests/net/pmtu.sh | 95 ++++++++++++++++++++++++++++- 2 files changed, 107 insertions(+), 1 deletion(-) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 723ac9181558..652f603d29fe 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1027,6 +1027,19 @@ static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu) struct fib_nh_common *nhc; fib_select_path(net, &res, fl4, NULL); +#ifdef CONFIG_IP_ROUTE_MULTIPATH + if (fib_info_num_path(res.fi) > 1) { + int nhsel; + + for (nhsel = 0; nhsel < fib_info_num_path(res.fi); nhsel++) { + nhc = fib_info_nhc(res.fi, nhsel); + update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, + jiffies + net->ipv4.ip_rt_mtu_expires); + } + rcu_read_unlock(); + return; + } +#endif /* CONFIG_IP_ROUTE_MULTIPATH */ nhc = FIB_RES_NHC(res); update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, jiffies + net->ipv4.ip_rt_mtu_expires); diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh index 569bce8b6383..f24c84184c61 100755 --- a/tools/testing/selftests/net/pmtu.sh +++ b/tools/testing/selftests/net/pmtu.sh @@ -197,6 +197,12 @@ # # - pmtu_ipv6_route_change # Same as above but with IPv6 +# +# - pmtu_ipv4_mp_exceptions +# Use the same topology as in pmtu_ipv4, but add routeable "dummy" +# addresses on host A and B on lo0 reachable via both routers. +# Host A and B "dummy" addresses have multipath routes to each other. +# Check that PMTU exceptions are created for both paths. source lib.sh source net_helper.sh @@ -266,7 +272,8 @@ tests=" list_flush_ipv4_exception ipv4: list and flush cached exceptions 1 list_flush_ipv6_exception ipv6: list and flush cached exceptions 1 pmtu_ipv4_route_change ipv4: PMTU exception w/route replace 1 - pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1" + pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1 + pmtu_ipv4_mp_exceptions ipv4: PMTU multipath nh exceptions 1" # Addressing and routing for tests with routers: four network segments, with # index SEGMENT between 1 and 4, a common prefix (PREFIX4 or PREFIX6) and an @@ -343,6 +350,9 @@ tunnel6_a_addr="fd00:2::a" tunnel6_b_addr="fd00:2::b" tunnel6_mask="64" +dummy4_a_addr="192.168.99.99" +dummy4_b_addr="192.168.88.88" + dummy6_0_prefix="fc00:1000::" dummy6_1_prefix="fc00:1001::" dummy6_mask="64" @@ -984,6 +994,50 @@ setup_ovs_bridge() { run_cmd ip route add ${prefix6}:${b_r1}::1 via ${prefix6}:${a_r1}::2 } +setup_multipath() { + if [ "$USE_NH" = "yes" ]; then + setup_multipath_new + else + setup_multipath_old + fi + + # Set up routers with routes to dummies + run_cmd ${ns_r1} ip route add ${dummy4_a_addr} via ${prefix4}.${a_r1}.1 + run_cmd ${ns_r2} ip route add ${dummy4_a_addr} via ${prefix4}.${a_r2}.1 + run_cmd ${ns_r1} ip route add ${dummy4_b_addr} via ${prefix4}.${b_r1}.1 + run_cmd ${ns_r2} ip route add ${dummy4_b_addr} via ${prefix4}.${b_r2}.1 +} + +setup_multipath_new() { + # Set up host A with multipath routes to host B dummy4_b_addr + run_cmd ${ns_a} ip addr add ${dummy4_a_addr} dev lo0 + run_cmd ${ns_a} ip nexthop add id 201 via ${prefix4}.${a_r1}.2 dev veth_A-R1 + run_cmd ${ns_a} ip nexthop add id 202 via ${prefix4}.${a_r2}.2 dev veth_A-R2 + run_cmd ${ns_a} ip nexthop add id 203 group 201/202 + run_cmd ${ns_a} ip route add ${dummy4_b_addr} nhid 203 + + # Set up host B with multipath routes to host A dummy4_a_addr + run_cmd ${ns_b} ip addr add ${dummy4_b_addr} dev lo0 + run_cmd ${ns_b} ip nexthop add id 201 via ${prefix4}.${b_r1}.2 dev veth_A-R1 + run_cmd ${ns_b} ip nexthop add id 202 via ${prefix4}.${b_r2}.2 dev veth_A-R2 + run_cmd ${ns_b} ip nexthop add id 203 group 201/202 + run_cmd ${ns_b} ip route add ${dummy4_a_addr} nhid 203 +} + +setup_multipath_old() { + # Set up host A with multipath routes to host B dummy4_b_addr + run_cmd ${ns_a} ip addr add ${dummy4_a_addr} dev lo0 + run_cmd ${ns_a} ip route add ${dummy4_b_addr} \ + nexthop via ${prefix4}.${a_r1}.2 weight 1 \ + nexthop via ${prefix4}.${a_r2}.2 weight 1 + + # Set up host B with multipath routes to host A dummy4_a_addr + run_cmd ${ns_b} ip addr add ${dummy4_b_addr} dev lo0 + run_cmd ${ns_a} ip route add ${dummy4_a_addr} \ + nexthop via ${prefix4}.${a_b1}.2 weight 1 \ + nexthop via ${prefix4}.${a_b2}.2 weight 1 +} + setup() { [ "$(id -u)" -ne 0 ] && echo " need to run as root" && return $ksft_skip @@ -2329,6 +2383,45 @@ test_pmtu_ipv6_route_change() { test_pmtu_ipvX_route_change 6 } +test_pmtu_ipv4_mp_exceptions() { + setup namespaces routing multipath || return $ksft_skip + + trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ + "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ + "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ + "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 + + # Set up initial MTU values + mtu "${ns_a}" veth_A-R1 2000 + mtu "${ns_r1}" veth_R1-A 2000 + mtu "${ns_r1}" veth_R1-B 1400 + mtu "${ns_b}" veth_B-R1 1400 + + mtu "${ns_a}" veth_A-R2 2000 + mtu "${ns_r2}" veth_R2-A 2000 + mtu "${ns_r2}" veth_R2-B 1500 + mtu "${ns_b}" veth_B-R2 1500 + + fail=0 + + # Ping and expect two nexthop exceptions for two routes in nh group + run_cmd ${ns_a} ping -q -M want -i 0.1 -c 1 -s 1800 "${dummy4_b_addr}" + + # Do route lookup before checking cached exceptions. + # The following commands are needed for dst entries to be cached + # in both paths exceptions and therefore dumped to user space + run_cmd ${ns_a} ip route get ${dummy4_b_addr} oif veth_A-R1 + run_cmd ${ns_a} ip route get ${dummy4_b_addr} oif veth_A-R2 + + # Check cached exceptions + if [ "$(${ns_a} ip -oneline route list cache | grep mtu | wc -l)" -ne 2 ]; then + err " there are not enough cached exceptions" + fail=1 + fi + + return ${fail} +} + usage() { echo echo "$0 [OPTIONS] [TEST]..." base-commit: 66600fac7a984dea4ae095411f644770b2561ede -- 2.43.5

7 months, 3 weeks

3
3
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[PATCH 0/6] kselftest/arm64: Test floating point signal context restore in fp-stress

by Mark Brown

Currently we test signal delivery to the programs run by fp-stress but our signal handlers simply count the number of signals seen and don't do anything with the floating point state. The original fpsimd-test and sve-test programs had signal handlers called irritators which modify the live register state, verifying that we restore the signal context on return, but a combination of misleading comments and code resulted in them never being used and the equivalent handlers in the other tests being stubbed or omitted. Clarify the code, implement effective irritator handlers for the test programs that can have them and then switch the signals generated by the fp-stress program over to use the irritators, ensuring that we validate that we restore the saved signal context properly. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Mark Brown (6): kselftest/arm64: Correct misleading comments on fp-stress irritators kselftest/arm64: Remove unused ADRs from irritator handlers kselftest/arm64: Corrupt P15 in the irritator when testing SSVE kselftest/arm64: Implement irritators for ZA and ZT kselftest/arm64: Provide a SIGUSR1 handler in the kernel mode FP stress test kselftest/arm64: Test signal handler state modification in fp-stress tools/testing/selftests/arm64/fp/fp-stress.c | 2 +- tools/testing/selftests/arm64/fp/fpsimd-test.S | 4 +--- tools/testing/selftests/arm64/fp/kernel-test.c | 4 ++++ tools/testing/selftests/arm64/fp/sve-test.S | 6 ++---- tools/testing/selftests/arm64/fp/za-test.S | 13 ++++--------- tools/testing/selftests/arm64/fp/zt-test.S | 13 ++++--------- 6 files changed, 16 insertions(+), 26 deletions(-) --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241023-arm64-fp-stress-irritator-5415fe92adef Best regards, -- Mark Brown <broonie(a)kernel.org>

7 months, 3 weeks

2
15
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Re: [PATCH v2 2/9] initramfs_test: kunit tests for initramfs unpacking

by David Disseldorp

[adding kunit lists to cc, see lore link below for context] https://lore.kernel.org/linux-fsdevel/20241104141750.16119-3-ddiss@suse.de/ On Wed, 6 Nov 2024 07:04:21 +0800, kernel test robot wrote: ... > All warnings (new ones prefixed by >>, old ones prefixed by <<): > > >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x0 (section: .data) -> initramfs_test_extract (section: .init.text) > >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x30 (section: .data) -> initramfs_test_fname_overrun (section: .init.text) > >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x60 (section: .data) -> initramfs_test_data (section: .init.text) > >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0x90 (section: .data) -> initramfs_test_csum (section: .init.text) > >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0xc0 (section: .data) -> initramfs_test_hardlink (section: .init.text) > >> WARNING: modpost: vmlinux: section mismatch in reference: initramfs_test_cases+0xf0 (section: .data) -> initramfs_test_many (section: .init.text) If I understand correctly, the kunit_case initramfs_test_cases[] members can't be flagged __initdata, as they need to be present post-init for results queries via debugfs. The remaining -Wimplicit-function-declaration reports are all valid. I'll fix them in v3. Thanks, David

7 months, 3 weeks

1
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[PATCH] selftests/ftrace: update kprobe syntax error test for ppc64le

by Hari Bathini

For ppc64le, depending on the kernel configuration used, offset 16 from function start address can also be considered function entry. Update the test case to accommodate such configurations. Signed-off-by: Hari Bathini <hbathini(a)linux.ibm.com> --- .../selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc index a16c6a6f6055..c03b94cc5784 100644 --- a/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc +++ b/tools/testing/selftests/ftrace/test.d/kprobe/kprobe_syntax_errors.tc @@ -111,7 +111,11 @@ check_error 'p vfs_read $arg* ^$arg*' # DOUBLE_ARGS if !grep -q 'kernel return probes support:' README; then check_error 'r vfs_read ^$arg*' # NOFENTRY_ARGS fi +if [ "$(uname -m)" = "ppc64le" ]; then +check_error 'p vfs_read+20 ^$arg*' # NOFENTRY_ARGS +else check_error 'p vfs_read+8 ^$arg*' # NOFENTRY_ARGS +fi check_error 'p vfs_read ^hoge' # NO_BTFARG check_error 'p kfree ^$arg10' # NO_BTFARG (exceed the number of parameters) check_error 'r kfree ^$retval' # NO_RETVAL -- 2.47.0

7 months, 3 weeks

4
14
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[PATCH net-next] selftests: net: include lib/sh/*.sh with lib.sh

by Matthieu Baerts (NGI0)

Recently, the net/lib.sh file has been modified to include defer.sh from net/lib/sh/ directory. The Makefile from net/lib has been modified accordingly, but not the ones from the sub-targets using net/lib.sh. Because of that, the new file is not installed as expected when installing the Forwarding, MPTCP, and Netfilter targets, e.g. # make -C tools/testing/selftests TARGETS=net/mptcp install \ INSTALL_PATH=/tmp/kself # cd /tmp/kself/ # ./run_kselftest.sh -c net/mptcp TAP version 13 1..7 # timeout set to 1800 # selftests: net/mptcp: mptcp_connect.sh # ./../lib.sh: line 5: /tmp/kself/net/lib/sh/defer.sh: No such file or directory # (...) This can be fixed simply by adding all the .sh files from net/lib/sh directory to the TEST_INCLUDES variable in the different Makefile's. Fixes: a6e263f125cd ("selftests: net: lib: Introduce deferred commands") Signed-off-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- tools/testing/selftests/net/forwarding/Makefile | 3 ++- tools/testing/selftests/net/mptcp/Makefile | 2 +- tools/testing/selftests/net/netfilter/Makefile | 3 ++- 3 files changed, 5 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/net/forwarding/Makefile b/tools/testing/selftests/net/forwarding/Makefile index 224346426ef2220470bf2dbef66198eae9331f56..7d885cff8d79bc6882d2341d0a1a59891fc1cb2e 100644 --- a/tools/testing/selftests/net/forwarding/Makefile +++ b/tools/testing/selftests/net/forwarding/Makefile @@ -126,6 +126,7 @@ TEST_FILES := devlink_lib.sh \ tc_common.sh TEST_INCLUDES := \ - ../lib.sh + ../lib.sh \ + $(wildcard ../lib/sh/*.sh) include ../../lib.mk diff --git a/tools/testing/selftests/net/mptcp/Makefile b/tools/testing/selftests/net/mptcp/Makefile index 5d796622e73099d0a0331c1bc8a41f09e1d36b4d..8e3fc05a539797c5e0feab72be69db623ef3fa96 100644 --- a/tools/testing/selftests/net/mptcp/Makefile +++ b/tools/testing/selftests/net/mptcp/Makefile @@ -11,7 +11,7 @@ TEST_GEN_FILES = mptcp_connect pm_nl_ctl mptcp_sockopt mptcp_inq TEST_FILES := mptcp_lib.sh settings -TEST_INCLUDES := ../lib.sh ../net_helper.sh +TEST_INCLUDES := ../lib.sh $(wildcard ../lib/sh/*.sh) ../net_helper.sh EXTRA_CLEAN := *.pcap diff --git a/tools/testing/selftests/net/netfilter/Makefile b/tools/testing/selftests/net/netfilter/Makefile index 542f7886a0bc2ac016f41d8b70357a8e0c1d271b..9d009f74cfc2da66428b1e23d5884e2c3bc4a85d 100644 --- a/tools/testing/selftests/net/netfilter/Makefile +++ b/tools/testing/selftests/net/netfilter/Makefile @@ -55,4 +55,5 @@ TEST_FILES := lib.sh TEST_FILES += packetdrill TEST_INCLUDES := \ - ../lib.sh + ../lib.sh \ + $(wildcard ../lib/sh/*.sh) --- base-commit: ecf99864ea6b1843773589a935bb026951bf12dd change-id: 20241104-net-next-selftests-lib-sh-deps-cc359ca5602f Best regards, -- Matthieu Baerts (NGI0) <matttbe(a)kernel.org>

7 months, 3 weeks

3
2
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[PATCH bpf-next/net v3] selftests/bpf: Drop netns helpers in mptcp

by Geliang Tang

From: Geliang Tang <tanggeliang(a)kylinos.cn> New netns selftest helpers netns_new() and netns_free() has been added in network_helpers.c, let's use them in mptcp selftests too instead of using MPTCP's own helpers create_netns() and cleanup_netns(). Signed-off-by: Geliang Tang <tanggeliang(a)kylinos.cn> Reviewed-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- v3: - No code has changed. - Change subject prefix as "bpf-next/net" since CI complains that this patch cannot be merged. - Add Matt's Reviewed-by tag. v2: - Use netns_new/netns_free instead of create_netns/cleanup_netns as Martin suggested. v1: selftests/bpf: Use make/remove netns helpers in mptcp --- .../testing/selftests/bpf/prog_tests/mptcp.c | 42 ++++++------------- 1 file changed, 12 insertions(+), 30 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c index be3cad2aff77..f8eb7f9d4fd2 100644 --- a/tools/testing/selftests/bpf/prog_tests/mptcp.c +++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c @@ -69,24 +69,6 @@ struct mptcp_storage { char ca_name[TCP_CA_NAME_MAX]; }; -static struct nstoken *create_netns(void) -{ - SYS(fail, "ip netns add %s", NS_TEST); - SYS(fail, "ip -net %s link set dev lo up", NS_TEST); - - return open_netns(NS_TEST); -fail: - return NULL; -} - -static void cleanup_netns(struct nstoken *nstoken) -{ - if (nstoken) - close_netns(nstoken); - - SYS_NOFAIL("ip netns del %s", NS_TEST); -} - static int start_mptcp_server(int family, const char *addr_str, __u16 port, int timeout_ms) { @@ -206,15 +188,15 @@ static int run_test(int cgroup_fd, int server_fd, bool is_mptcp) static void test_base(void) { - struct nstoken *nstoken = NULL; + struct netns_obj *netns = NULL; int server_fd, cgroup_fd; cgroup_fd = test__join_cgroup("/mptcp"); if (!ASSERT_GE(cgroup_fd, 0, "test__join_cgroup")) return; - nstoken = create_netns(); - if (!ASSERT_OK_PTR(nstoken, "create_netns")) + netns = netns_new(NS_TEST, true); + if (!ASSERT_OK_PTR(netns, "netns_new")) goto fail; /* without MPTCP */ @@ -237,7 +219,7 @@ static void test_base(void) close(server_fd); fail: - cleanup_netns(nstoken); + netns_free(netns); close(cgroup_fd); } @@ -322,21 +304,21 @@ static int run_mptcpify(int cgroup_fd) static void test_mptcpify(void) { - struct nstoken *nstoken = NULL; + struct netns_obj *netns = NULL; int cgroup_fd; cgroup_fd = test__join_cgroup("/mptcpify"); if (!ASSERT_GE(cgroup_fd, 0, "test__join_cgroup")) return; - nstoken = create_netns(); - if (!ASSERT_OK_PTR(nstoken, "create_netns")) + netns = netns_new(NS_TEST, true); + if (!ASSERT_OK_PTR(netns, "netns_new")) goto fail; ASSERT_OK(run_mptcpify(cgroup_fd), "run_mptcpify"); fail: - cleanup_netns(nstoken); + netns_free(netns); close(cgroup_fd); } @@ -414,7 +396,7 @@ static void run_subflow(void) static void test_subflow(void) { struct mptcp_subflow *skel; - struct nstoken *nstoken; + struct netns_obj *netns; int cgroup_fd; cgroup_fd = test__join_cgroup("/mptcp_subflow"); @@ -437,8 +419,8 @@ static void test_subflow(void) if (!ASSERT_OK_PTR(skel->links._getsockopt_subflow, "attach _getsockopt_subflow")) goto skel_destroy; - nstoken = create_netns(); - if (!ASSERT_OK_PTR(nstoken, "create_netns: mptcp_subflow")) + netns = netns_new(NS_TEST, true); + if (!ASSERT_OK_PTR(netns, "netns_new: mptcp_subflow")) goto skel_destroy; if (endpoint_init("subflow") < 0) @@ -447,7 +429,7 @@ static void test_subflow(void) run_subflow(); close_netns: - cleanup_netns(nstoken); + netns_free(netns); skel_destroy: mptcp_subflow__destroy(skel); close_cgroup: -- 2.45.2

7 months, 3 weeks

2
1
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[PATCH net-next v1 0/7] devmem TCP fixes

by Mina Almasry

A few unrelated devmem TCP fixes bundled in a series for some convenience (if that's ok). Patch 1-2: fix naming and provide page_pool_alloc_netmem for fragged netmem. Patch 3-4: fix issues with dma-buf dma addresses being potentially passed to dma_sync_for_* helpers. Patch 5-6: fix syzbot SO_DEVMEM_DONTNEED issue and add test for this case. Mina Almasry (6): net: page_pool: rename page_pool_alloc_netmem to *_netmems net: page_pool: create page_pool_alloc_netmem page_pool: disable sync for cpu for dmabuf memory provider netmem: add netmem_prefetch net: fix SO_DEVMEM_DONTNEED looping too long ncdevmem: add test for too many token_count Samiullah Khawaja (1): page_pool: Set `dma_sync` to false for devmem memory provider include/net/netmem.h | 7 ++++ include/net/page_pool/helpers.h | 50 ++++++++++++++++++-------- include/net/page_pool/types.h | 2 +- net/core/devmem.c | 9 +++-- net/core/page_pool.c | 11 +++--- net/core/sock.c | 46 ++++++++++++++---------- tools/testing/selftests/net/ncdevmem.c | 11 ++++++ 7 files changed, 93 insertions(+), 43 deletions(-) -- 2.47.0.163.g1226f6d8fa-goog

7 months, 3 weeks

3
12
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[PATCH v5 0/2] selftests/resctrl: SNC kernel support discovery

by Maciej Wieczor-Retman

Changes v5: - Tests are skipped if snc_unreliable was set. - Moved resctrlfs.c changes from patch 2/2 to 1/2. - Removed CAT changes since it's not impacted by SNC in the selftest. - Updated various comments. - Fixed a bunch of minor issues pointed out in the review. Changes v4: - Printing SNC warnings at the start of every test. - Printing SNC warnings at the end of every relevant test. - Remove global snc_mode variable, consolidate snc detection functions into one. - Correct minor mistakes. Changes v3: - Reworked patch 2. - Changed minor things in patch 1 like function name and made corrections to the patch message. Changes v2: - Removed patches 2 and 3 since now this part will be supported by the kernel. Sub-Numa Clustering (SNC) allows splitting CPU cores, caches and memory into multiple NUMA nodes. When enabled, NUMA-aware applications can achieve better performance on bigger server platforms. SNC support in the kernel was merged into x86/cache [1]. With SNC enabled and kernel support in place all the tests will function normally (aside from effective cache size). There might be a problem when SNC is enabled but the system is still using an older kernel version without SNC support. Currently the only message displayed in that situation is a guess that SNC might be enabled and is causing issues. That message also is displayed whenever the test fails on an Intel platform. Add a mechanism to discover kernel support for SNC which will add more meaning and certainty to the error message. Add runtime SNC mode detection and verify how reliable that information is. Series was tested on Ice Lake server platforms with SNC disabled, SNC-2 and SNC-4. The tests were also ran with and without kernel support for SNC. Series applies cleanly on kselftest/next. [1] https://lore.kernel.org/all/20240628215619.76401-1-tony.luck@intel.com/ Previous versions of this series: [v1] https://lore.kernel.org/all/cover.1709721159.git.maciej.wieczor-retman@inte… [v2] https://lore.kernel.org/all/cover.1715769576.git.maciej.wieczor-retman@inte… [v3] https://lore.kernel.org/all/cover.1719842207.git.maciej.wieczor-retman@inte… [v4] https://lore.kernel.org/all/cover.1720774981.git.maciej.wieczor-retman@inte… Maciej Wieczor-Retman (2): selftests/resctrl: Adjust effective L3 cache size with SNC enabled selftests/resctrl: Adjust SNC support messages tools/testing/selftests/resctrl/cmt_test.c | 8 +- tools/testing/selftests/resctrl/mba_test.c | 8 +- tools/testing/selftests/resctrl/mbm_test.c | 10 +- tools/testing/selftests/resctrl/resctrl.h | 7 + .../testing/selftests/resctrl/resctrl_tests.c | 8 +- tools/testing/selftests/resctrl/resctrlfs.c | 132 ++++++++++++++++++ 6 files changed, 166 insertions(+), 7 deletions(-) -- 2.46.2

7 months, 3 weeks

2
5
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[PATCH net-next v6 0/7] Suspend IRQs during application busy periods

by Joe Damato

Greetings: Welcome to v6, see changelog below. This revision includes only documentation changes: patch 7 has been updated with Bagas' suggestions and the htmldoc looks better as a result. In addition, this cover letter has been updated with a full re-run of the test data. We've included a new test case highlighting a case Sridhar asked about in our v3. See below. This series introduces a new mechanism, IRQ suspension, which allows network applications using epoll to mask IRQs during periods of high traffic while also reducing tail latency (compared to existing mechanisms, see below) during periods of low traffic. In doing so, this balances CPU consumption with network processing efficiency. Martin Karsten (CC'd) and I have been collaborating on this series for several months and have appreciated the feedback from the community on our RFC [1]. We've updated the cover letter and kernel documentation in an attempt to more clearly explain how this mechanism works, how applications can use it, and how it compares to existing mechanisms in the kernel. We've added an additional test case, 'fullbusy', achieved by modifying libevent for comparison. See below for a detailed description, link to the patch, and test results. I briefly mentioned this idea at netdev conf 2024 (for those who were there) and Martin described this idea in an earlier paper presented at Sigmetrics 2024 [2]. ~ The short explanation (TL;DR) We propose adding a new napi config parameter: irq_suspend_timeout to help balance CPU usage and network processing efficiency when using IRQ deferral and napi busy poll. If this parameter is set to a non-zero value *and* a user application has enabled preferred busy poll on a busy poll context (via the EPIOCSPARAMS ioctl introduced in commit 18e2bf0edf4d ("eventpoll: Add epoll ioctl for epoll_params")), then application calls to epoll_wait for that context will cause device IRQs and softirq processing to be suspended as long as epoll_wait successfully retrieves data from the NAPI. Each time data is retrieved, the irq_suspend_timeout is deferred. If/when network traffic subsides and epoll_wait returns no data, IRQ suspension is immediately reverted back to the existing napi_defer_hard_irqs and gro_flush_timeout mechanism which was introduced in commit 6f8b12d661d0 ("net: napi: add hard irqs deferral feature")). The irq_suspend_timeout serves as a safety mechanism. If userland takes a long time processing data, irq_suspend_timeout will fire and restart normal NAPI processing. For a more in depth explanation, please continue reading. ~ Comparison with existing mechanisms Interrupt mitigation can be accomplished in napi software, by setting napi_defer_hard_irqs and gro_flush_timeout, or via interrupt coalescing in the NIC. This can be quite efficient, but in both cases, a fixed timeout (or packet count) needs to be configured. However, a fixed timeout cannot effectively support both low- and high-load situations: At low load, an application typically processes a few requests and then waits to receive more input data. In this scenario, a large timeout will cause unnecessary latency. At high load, an application typically processes many requests before being ready to receive more input data. In this case, a small timeout will likely fire prematurely and trigger irq/softirq processing, which interferes with the application's execution. This causes overhead, most likely due to cache contention. While NICs attempt to provide adaptive interrupt coalescing schemes, these cannot properly take into account application-level processing. An alternative packet delivery mechanism is busy-polling, which results in perfect alignment of application processing and network polling. It delivers optimal performance (throughput and latency), but results in 100% cpu utilization and is thus inefficient for below-capacity workloads. We propose to add a new packet delivery mode that properly alternates between busy polling and interrupt-based delivery depending on busy and idle periods of the application. During a busy period, the system operates in busy-polling mode, which avoids interference. During an idle period, the system falls back to interrupt deferral, but with a small timeout to avoid excessive latencies. This delivery mode can also be viewed as an extension of basic interrupt deferral, but alternating between a small and a very large timeout. This delivery mode is efficient, because it avoids softirq execution interfering with application processing during busy periods. It can be used with blocking epoll_wait to conserve cpu cycles during idle periods. The effect of alternating between busy and idle periods is that performance (throughput and latency) is very close to full busy polling, while cpu utilization is lower and very close to interrupt mitigation. ~ Usage details IRQ suspension is introduced via a per-NAPI configuration parameter that controls the maximum time that IRQs can be suspended. Here's how it is intended to work: - The user application (or system administrator) uses the netdev-genl netlink interface to set the pre-existing napi_defer_hard_irqs and gro_flush_timeout NAPI config parameters to enable IRQ deferral. - The user application (or system administrator) sets the proposed irq_suspend_timeout parameter via the netdev-genl netlink interface to a larger value than gro_flush_timeout to enable IRQ suspension. - The user application issues the existing epoll ioctl to set the prefer_busy_poll flag on the epoll context. - The user application then calls epoll_wait to busy poll for network events, as it normally would. - If epoll_wait returns events to userland, IRQs are suspended for the duration of irq_suspend_timeout. - If epoll_wait finds no events and the thread is about to go to sleep, IRQ handling using napi_defer_hard_irqs and gro_flush_timeout is resumed. As long as epoll_wait is retrieving events, IRQs (and softirq processing) for the NAPI being polled remain disabled. When network traffic reduces, eventually a busy poll loop in the kernel will retrieve no data. When this occurs, regular IRQ deferral using gro_flush_timeout for the polled NAPI is re-enabled. Unless IRQ suspension is continued by subsequent calls to epoll_wait, it automatically times out after the irq_suspend_timeout timer expires. Regular deferral is also immediately re-enabled when the epoll context is destroyed. ~ Usage scenario The target scenario for IRQ suspension as packet delivery mode is a system that runs a dominant application with substantial network I/O. The target application can be configured to receive input data up to a certain batch size (via epoll_wait maxevents parameter) and this batch size determines the worst-case latency that application requests might experience. Because packet delivery is suspended during the target application's processing, the batch size also determines the worst-case latency of concurrent applications using the same RX queue(s). gro_flush_timeout should be set as small as possible, but large enough to make sure that a single request is likely not being interfered with. irq_suspend_timeout is largely a safety mechanism against misbehaving applications. It should be set large enough to cover the processing of an entire application batch, i.e., the factor between gro_flush_timeout and irq_suspend_timeout should roughly correspond to the maximum batch size that the target application would process in one go. ~ Design rationale The implementation of the IRQ suspension mechanism very nicely dovetails with the existing mechanism for IRQ deferral when preferred busy poll is enabled (introduced in commit 7fd3253a7de6 ("net: Introduce preferred busy-polling"), see that commit message for more details). While it would be possible to inject the suspend timeout via the existing epoll ioctl, it is more natural to avoid this path for one main reason: An epoll context is linked to NAPI IDs as file descriptors are added; this means any epoll context might suddenly be associated with a different net_device if the application were to replace all existing fds with fds from a different device. In this case, the scope of the suspend timeout becomes unclear and many edge cases for both the user application and the kernel are introduced Only a single iteration through napi busy polling is needed for this mechanism to work effectively. Since an important objective for this mechanism is preserving cpu cycles, exactly one iteration of the napi busy loop is invoked when busy_poll_usecs is set to 0. ~ Important call out in the implementation - Enabling per epoll-context preferred busy poll will now effectively lead to a nonblocking iteration through napi_busy_loop, even when busy_poll_usecs is 0. See patch 4. ~ Benchmark configs & descriptions The changes were benchmarked with memcached [3] using the benchmarking tool mutilate [4]. To facilitate benchmarking, a small patch [5] was applied to memcached 1.6.29 to allow setting per-epoll context preferred busy poll and other settings via environment variables. Another small patch [6] was applied to libevent to enable full busy-polling. Multiple scenarios were benchmarked as described below and the scripts used for producing these results can be found on github [7] (note: all scenarios use NAPI-based traffic splitting via SO_INCOMING_ID by passing -N to memcached): - base: - no other options enabled - deferX: - set defer_hard_irqs to 100 - set gro_flush_timeout to X,000 - napibusy: - set defer_hard_irqs to 100 - set gro_flush_timeout to 200,000 - enable busy poll via the existing ioctl (busy_poll_usecs = 64, busy_poll_budget = 64, prefer_busy_poll = true) - fullbusy: - set defer_hard_irqs to 100 - set gro_flush_timeout to 5,000,000 - enable busy poll via the existing ioctl (busy_poll_usecs = 1000, busy_poll_budget = 64, prefer_busy_poll = true) - change memcached's nonblocking epoll_wait invocation (via libevent) to using a 1 ms timeout - suspend0: - set defer_hard_irqs to 0 - set gro_flush_timeout to 0 - set irq_suspend_timeout to 20,000,000 - enable busy poll via the existing ioctl (busy_poll_usecs = 0, busy_poll_budget = 64, prefer_busy_poll = true) - suspendX: - set defer_hard_irqs to 100 - set gro_flush_timeout to X,000 - set irq_suspend_timeout to 20,000,000 - enable busy poll via the existing ioctl (busy_poll_usecs = 0, busy_poll_budget = 64, prefer_busy_poll = true) ~ Benchmark results Tested on: Single socket AMD EPYC 7662 64-Core Processor Hyperthreading disabled 4 NUMA Zones (NPS=4) 16 CPUs per NUMA zone (64 cores total) 2 x Dual port 100gbps Mellanox Technologies ConnectX-5 Ex EN NIC The test machine is configured such that a single interface has 8 RX queues. The queues' IRQs and memcached are pinned to CPUs that are NUMA-local to the interface which is under test. The NIC's interrupt coalescing configuration is left at boot-time defaults. Results: Results are shown below. The mechanism added by this series is represented by the 'suspend' cases. Data presented shows a summary over at least 15 runs of each test case [8] using the scripts on github [7]. For latency, the median is shown. For throughput and CPU utilization, the average is shown. The results also include cycles-per-query (cpq) and instruction-per-query (ipq) metrics, following the methodology proposed in [2], to augment the CPU utilization numbers, which could be skewed due to frequency scaling. We find that this does not appear to be the case as CPU utilization and low-level metrics show similar trends. These results were captured using the scripts on github [7] to illustrate how this approach compares with other pre-existing mechanisms. This data is not to be interpreted as scientific data captured in a fully isolated lab setting, but instead as best effort, illustrative information comparing and contrasting tradeoffs. The absolute QPS results are higher than our previous submission, but the relative differences between variants are equivalent. Because the patches have been rebased on 6.12, several factors have likely influenced the overall performance. Most importantly, we had to switch to a new set of basic kernel options, which has likely altered the baseline performance. Because the overall comparison of variants still holds, we have not attempted to recreate the exact set of kernel options from the previous submission. Compare: - Throughput (MAX) and latencies of base vs suspend. - CPU usage of napibusy and fullbusy during lower load (200K, 400K for example) vs suspend. - Latency of the defer variants vs suspend as timeout and load increases. - suspend0, which sets defer_hard_irqs and gro_flush_timeout to 0, has nearly the same performance as the base case (this is FAQ item #1). The overall takeaway is that the suspend variants provide a superior combination of high throughput, low latency, and low cpu utilization compared to all other variants. Each of the suspend variants works very well, but some fine-tuning between latency and cpu utilization is still possible by tuning the small timeout (gro_flush_timeout). Note: we've reorganized the results to make comparison among testcases with the same load easier. testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 200K 199954 112 237 415 26 13040 11336 defer10 200K 200002 54 123 142 28 19033 16508 defer20 200K 199985 60 130 153 26 15737 14247 defer50 200K 199968 78 142 181 23 12113 11609 defer200 200K 199997 163 252 304 18 8449 9155 fullbusy 200K 199993 46 117 132 100 43959 23320 napibusy 200K 200006 100 237 275 56 25016 24866 suspend0 200K 200012 105 249 432 29 14369 11844 suspend10 200K 200004 53 123 141 32 19432 16752 suspend20 200K 200014 58 126 151 30 16356 14670 suspend50 200K 200018 73 134 176 26 13245 12416 suspend200 200K 200027 149 250 302 20 9508 9781 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 400K 399984 139 268 715 40 9437 9299 defer10 400K 400002 59 133 165 53 14089 12908 defer20 400K 400016 66 140 171 47 12085 11682 defer50 400K 400037 87 161 198 39 9528 9879 defer200 400K 399954 181 273 329 32 7326 8438 fullbusy 400K 399951 50 123 155 100 21990 16097 napibusy 400K 399997 76 221 271 83 18260 16511 suspend0 400K 399991 125 337 768 48 11051 9629 suspend10 400K 399990 57 129 161 54 13629 12841 suspend20 400K 399922 61 135 167 49 12055 11715 suspend50 400K 400024 75 148 186 42 10049 10243 suspend200 400K 399936 154 267 325 34 7770 8677 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 600K 600064 148 265 576 61 9276 8757 defer10 600K 599985 71 147 204 76 12048 10863 defer20 600K 600024 75 151 199 66 10572 10328 defer50 600K 600054 94 172 217 55 8584 9144 defer200 600K 600030 200 299 355 45 6874 8189 fullbusy 600K 599956 55 127 176 100 14650 13968 napibusy 600K 599956 64 163 252 96 14022 14153 suspend0 600K 600029 126 306 724 70 10393 8977 suspend10 600K 599997 63 137 194 70 10991 11005 suspend20 600K 600012 67 141 194 65 10108 10359 suspend50 600K 600045 80 157 203 57 8747 9320 suspend200 600K 599940 158 277 344 48 7221 8354 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 800K 800025 179 298 555 86 9572 8297 defer10 800K 799275 224 633 1271 96 10679 8904 defer20 800K 800041 114 226 328 90 10122 8917 defer50 800K 799936 118 207 288 77 8820 8607 defer200 800K 799994 228 341 403 65 7424 8130 fullbusy 800K 799964 62 136 192 100 10992 12518 napibusy 800K 799971 65 142 216 99 10911 12529 suspend0 800K 799965 126 250 533 86 9489 8496 suspend10 800K 799995 69 145 201 83 9475 9764 suspend20 800K 799931 74 151 209 79 8976 9336 suspend50 800K 799946 87 168 224 71 7993 8794 suspend200 800K 799993 160 292 357 62 6967 8184 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 1000K 915792 3498 5740 6239 97 9388 7930 defer10 1000K 876285 3896 6095 6418 99 9960 8542 defer20 1000K 914909 3107 5771 6283 97 9407 8284 defer50 1000K 928426 2977 5591 5931 97 9214 8012 defer200 1000K 959989 3097 5306 5929 96 8816 7908 fullbusy 1000K 1000102 74 155 213 100 8796 10559 napibusy 1000K 1000006 74 154 216 100 8787 10654 suspend0 1000K 960757 2223 5715 7029 98 8964 7993 suspend10 1000K 999926 80 162 222 92 8246 8922 suspend20 1000K 1000095 85 166 226 89 7966 8719 suspend50 1000K 1000067 96 180 238 84 7476 8419 suspend200 1000K 999968 163 298 363 76 6798 8061 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base MAX 1054805 4152 5298 5743 100 8332 7890 defer10 MAX 937098 4598 6010 6347 100 9378 8407 defer20 MAX 988905 4389 5637 5990 100 8886 8106 defer50 MAX 1067194 3960 5216 5544 100 8235 7911 defer200 MAX 1054967 4084 5496 5821 100 8323 7871 fullbusy MAX 1248006 3472 3918 3979 100 7050 7919 napibusy MAX 1128384 3742 7958 10753 100 7776 7872 suspend0 MAX 1034456 4242 5668 6042 100 8497 7912 suspend10 MAX 1229229 3513 3926 3986 100 7156 7937 suspend20 MAX 1226845 3514 3939 3985 100 7171 7937 suspend50 MAX 1230757 3513 3935 3983 100 7140 7935 suspend200 MAX 1230424 3503 3934 3984 100 7142 7927 ~ FAQ - Why is a new parameter needed? Does irq_suspend_timeout override gro_flush_timeout? Using the suspend mechanism causes the system to alternate between polling mode and irq-driven packet delivery. During busy periods, irq_suspend_timeout overrides gro_flush_timeout and keeps the system busy polling, but when epoll finds no events, the setting of gro_flush_timeout and napi_defer_hard_irqs determine the next step. There are essentially three possible loops for network processing and packet delivery: 1) hardirq -> softirq -> napi poll; basic interrupt delivery 2) timer -> softirq -> napi poll; deferred irq processing 3) epoll -> busy-poll -> napi poll; busy looping Loop 2 can take control from Loop 1, if gro_flush_timeout and napi_defer_hard_irqs are set. If gro_flush_timeout and napi_defer_hard_irqs are set, Loops 2 and 3 "wrestle" with each other for control. During busy periods, irq_suspend_timeout is used as timer in Loop 2, which essentially tilts this in favour of Loop 3. If gro_flush_timeout and napi_defer_hard_irqs are not set, Loop 3 cannot take control from Loop 1. Therefore, setting gro_flush_timeout and napi_defer_hard_irqs is the recommended usage, because otherwise setting irq_suspend_timeout might not have any discernible effect. This is shown in the results above: compare suspend0 with the base case. Note that the lack of napi_defer_hard_irqs and gro_flush_timeout produce similar results for both, which encourages the use of napi_defer_hard_irqs and gro_flush_timeout in addition to irq_suspend_timeout. - Can the new timeout value be threaded through the new epoll ioctl ? Only with difficulty. The epoll ioctl sets options on an epoll context and the NAPI ID associated with an epoll context can change based on what file descriptors a user app adds to the epoll context. This would introduce complexity in the API from the user perspective and also complexity in the kernel. - Can irq suspend be built by combining NIC coalescing and gro_flush_timeout ? No. The problem is that the long timeout must engage if and only if prefer-busy is active. When using NIC coalescing for the short timeout (without napi_defer_hard_irqs/gro_flush_timeout), an interrupt after an idle period will trigger softirq, which will run napi polling. At this point, prefer-busy is not active, so NIC interrupts would be re-enabled. Then it is not possible for the longer timeout to interject to switch control back to polling. In other words, only by using the software timer for the short timeout, it is possible to extend the timeout without having to reprogram the NIC timer or reach down directly and disable interrupts. Using gro_flush_timeout for the long timeout also has problems, for the same underlying reason. In the current napi implementation, gro_flush_timeout is not tied to prefer-busy. We'd either have to change that and in the process modify the existing deferral mechanism, or introduce a state variable to determine whether gro_flush_timeout is used as long timeout for irq suspend or whether it is used for its default purpose. In an earlier version, we did try something similar to the latter and made it work, but it ends up being a lot more convoluted than our current proposal. - Isn't it already possible to combine busy looping with irq deferral? Yes, in fact enabling irq deferral via napi_defer_hard_irqs and gro_flush_timeout is a precondition for prefer_busy_poll to have an effect. If the application also uses a tight busy loop with essentially nonblocking epoll_wait (accomplished with a very short timeout parameter), this is the fullbusy case shown in the results. An application using blocking epoll_wait is shown as the napibusy case in the results. It's a hybrid approach that provides limited latency benefits compared to the base case and plain irq deferral, but not as good as fullbusy or suspend. ~ Special thanks Several people were involved in earlier stages of the development of this mechanism whom we'd like to thank: - Peter Cai (CC'd), for the initial kernel patch and his contributions to the paper. - Mohammadamin Shafie (CC'd), for testing various versions of the kernel patch and providing helpful feedback. Thanks, Martin and Joe [1]: https://lore.kernel.org/netdev/20240812125717.413108-1-jdamato@fastly.com/ [2]: https://doi.org/10.1145/3626780 [3]: https://github.com/memcached/memcached/blob/master/doc/napi_ids.txt [4]: https://github.com/leverich/mutilate [5]: https://raw.githubusercontent.com/martinkarsten/irqsuspend/main/patches/mem… [6]: https://raw.githubusercontent.com/martinkarsten/irqsuspend/main/patches/lib… [7]: https://github.com/martinkarsten/irqsuspend [8]: https://github.com/martinkarsten/irqsuspend/tree/main/results v6: - Updated the cover letter with a full re-run of all test cases, including a new case suspend0, as requested by Sridhar previously. - Updated the kernel documentation in patch 7 as suggested by Bagas Sanjaya, which improved the htmldoc output. v5: https://lore.kernel.org/netdev/20241103052421.518856-1-jdamato@fastly.com/ - Adjusted patch 5 to only suspend IRQs when ep_send_events returns a positive return value. This issue was pointed out by Hillf Danton. - Updated the commit message of patch 6 which still mentioned netcat, despite the code being updated in v4 to replace it with socat and fixed misspelling of netdevsim. - Fixed a minor typo in patch 7 and removed an unnecessary paragraph. - Added Sridhar Samudrala's Reviewed-by to patch 1-5 and 7. v4: https://lore.kernel.org/netdev/20241102005214.32443-1-jdamato@fastly.com/ - Added a new FAQ item to cover letter. - Updated patch 6 to use socat instead of nc in busy_poll_test.sh and updated busy_poller.c to use netlink directly to configure napi params. - Updated the kernel documentation in patch 7 to include more details. - Dropped Stanislav's Acked-by and Bagas' Reviewed-by from patch 7 since the documentation was updated. v3: https://lore.kernel.org/netdev/20241101004846.32532-1-jdamato@fastly.com/ - Added Stanislav Fomichev's Acked-by to every patch except the newly added selftest. - Added Bagas Sanjaya's Reviewed-by to the documentation patch. - Fixed the commit message of patch 2 to remove a reference to the now non-existent sysfs setting. - Added a self test which tests both "regular" busy poll and busy poll with suspend enabled. This was added as patch 6 as requested by Paolo. netdevsim was chosen instead of veth due to netdevsim's pre-existing support for netdev-genl. See the commit message of patch 6 for more details. v2: https://lore.kernel.org/bpf/20241021015311.95468-1-jdamato@fastly.com/ - Cover letter updated, including a re-run of test data. - Patch 1 rewritten to use netdev-genl instead of sysfs. - Patch 3 updated with a comment added to napi_resume_irqs. - Patch 4 rebased to apply now that commit b9ca079dd6b0 ("eventpoll: Annotate data-race of busy_poll_usecs") has been picked up from VFS. - Patch 6 updated the kernel documentation. rfc -> v1: - Cover letter updated to include more details. - Patch 1 updated to remove the documentation added. This was moved to patch 6 with the rest of the docs (see below). - Patch 5 updated to fix an error uncovered by the kernel build robot. See patch 5's changelog for more details. - Patch 6 added which updates kernel documentation. Joe Damato (2): selftests: net: Add busy_poll_test docs: networking: Describe irq suspension Martin Karsten (5): net: Add napi_struct parameter irq_suspend_timeout net: Suspend softirq when prefer_busy_poll is set net: Add control functions for irq suspension eventpoll: Trigger napi_busy_loop, if prefer_busy_poll is set eventpoll: Control irq suspension for prefer_busy_poll Documentation/netlink/specs/netdev.yaml | 7 + Documentation/networking/napi.rst | 170 ++++++++- fs/eventpoll.c | 36 +- include/linux/netdevice.h | 2 + include/net/busy_poll.h | 3 + include/uapi/linux/netdev.h | 1 + net/core/dev.c | 58 +++- net/core/dev.h | 25 ++ net/core/netdev-genl-gen.c | 5 +- net/core/netdev-genl.c | 12 + tools/include/uapi/linux/netdev.h | 1 + tools/testing/selftests/net/.gitignore | 1 + tools/testing/selftests/net/Makefile | 3 +- tools/testing/selftests/net/busy_poll_test.sh | 164 +++++++++ tools/testing/selftests/net/busy_poller.c | 328 ++++++++++++++++++ 15 files changed, 805 insertions(+), 11 deletions(-) create mode 100755 tools/testing/selftests/net/busy_poll_test.sh create mode 100644 tools/testing/selftests/net/busy_poller.c base-commit: dbb9a7ef347828870df3e5e6ddf19469a3277fc9 -- 2.25.1

7 months, 4 weeks

2
3
0 0

[PATCH net-next v7 00/12] selftests: ncdevmem: Add ncdevmem to ksft

by Stanislav Fomichev

The goal of the series is to simplify and make it possible to use ncdevmem in an automated way from the ksft python wrapper. ncdevmem is slowly mutated into a state where it uses stdout to print the payload and the python wrapper is added to make sure the arrived payload matches the expected one. v7: - fix validation (Mina) - add support for working with non ::ffff-prefixed addresses (Mina) v6: - fix compilation issue in 'Unify error handling' patch (Jakub) v5: - properly handle errors from inet_pton() and socket() (Paolo) - remove unneeded import from python selftest (Paolo) v4: - keep usage example with validation (Mina) - fix compilation issue in one patch (s/start_queues/start_queue/) v3: - keep and refine the comment about ncdevmem invocation (Mina) - add the comment about not enforcing exit status for ntuple reset (Mina) - make configure_headersplit more robust (Mina) - use num_queues/2 in selftest and let the users override it (Mina) - remove memory_provider.memcpy_to_device (Mina) - keep ksft as is (don't use -v validate flags): we are gonna need a --debug-disable flag to make it less chatty; otherwise it times out when sending too much data; so leaving it as a separate follow up v2: - don't remove validation (Mina) - keep 5-tuple flow steering but use it only when -c is provided (Mina) - remove separate flag for probing (Mina) - move ncdevmem under drivers/net/hw, not drivers/net (Jakub) Cc: Mina Almasry <almasrymina(a)google.com> Stanislav Fomichev (12): selftests: ncdevmem: Redirect all non-payload output to stderr selftests: ncdevmem: Separate out dmabuf provider selftests: ncdevmem: Unify error handling selftests: ncdevmem: Make client_ip optional selftests: ncdevmem: Remove default arguments selftests: ncdevmem: Switch to AF_INET6 selftests: ncdevmem: Properly reset flow steering selftests: ncdevmem: Use YNL to enable TCP header split selftests: ncdevmem: Remove hard-coded queue numbers selftests: ncdevmem: Run selftest when none of the -s or -c has been provided selftests: ncdevmem: Move ncdevmem under drivers/net/hw selftests: ncdevmem: Add automated test .../selftests/drivers/net/hw/.gitignore | 1 + .../testing/selftests/drivers/net/hw/Makefile | 9 + .../selftests/drivers/net/hw/devmem.py | 45 + .../selftests/drivers/net/hw/ncdevmem.c | 786 ++++++++++++++++++ tools/testing/selftests/net/.gitignore | 1 - tools/testing/selftests/net/Makefile | 8 - tools/testing/selftests/net/ncdevmem.c | 570 ------------- 7 files changed, 841 insertions(+), 579 deletions(-) create mode 100644 tools/testing/selftests/drivers/net/hw/.gitignore create mode 100755 tools/testing/selftests/drivers/net/hw/devmem.py create mode 100644 tools/testing/selftests/drivers/net/hw/ncdevmem.c delete mode 100644 tools/testing/selftests/net/ncdevmem.c -- 2.47.0

7 months, 4 weeks

4
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[PATCH v3 0/4] Add support for the Bus Lock Threshold

by Manali Shukla

Misbehaving guests can cause bus locks to degrade the performance of a system. Non-WB (write-back) and misaligned locked RMW (read-modify-write) instructions are referred to as "bus locks" and require system wide synchronization among all processors to guarantee the atomicity. The bus locks can impose notable performance penalties for all processors within the system. Support for the Bus Lock Threshold is indicated by CPUID Fn8000_000A_EDX[29] BusLockThreshold=1, the VMCB provides a Bus Lock Threshold enable bit and an unsigned 16-bit Bus Lock Threshold count. VMCB intercept bit VMCB Offset Bits Function 14h 5 Intercept bus lock operations Bus lock threshold count VMCB Offset Bits Function 120h 15:0 Bus lock counter During VMRUN, the bus lock threshold count is fetched and stored in an internal count register. Prior to executing a bus lock within the guest, the processor verifies the count in the bus lock register. If the count is greater than zero, the processor executes the bus lock, reducing the count. However, if the count is zero, the bus lock operation is not performed, and instead, a Bus Lock Threshold #VMEXIT is triggered to transfer control to the Virtual Machine Monitor (VMM). A Bus Lock Threshold #VMEXIT is reported to the VMM with VMEXIT code 0xA5h, VMEXIT_BUSLOCK. EXITINFO1 and EXITINFO2 are set to 0 on a VMEXIT_BUSLOCK. On a #VMEXIT, the processor writes the current value of the Bus Lock Threshold Counter to the VMCB. More details about the Bus Lock Threshold feature can be found in AMD APM [1]. v2 -> v3 - Drop parch to add virt tag in /proc/cpuinfo. - Incorporated Tom's review comments. v1 -> v2 - Incorporated misc review comments from Sean. - Removed bus_lock_counter module parameter. - Set the value of bus_lock_counter to zero by default and reload the value by 1 in bus lock exit handler. - Add documentation for the behavioral difference for KVM_EXIT_BUS_LOCK. - Improved selftest for buslock to work on SVM and VMX. - Rewrite the commit messages. Patches are prepared on kvm-next/next (efbc6bd090f4). Testing done: - Added a selftest for the Bus Lock Threshold functionality. - The bus lock threshold selftest has been tested on both Intel and AMD platforms. - Tested the Bus Lock Threshold functionality on SEV, SEV-ES, SEV-SNP guests. - Tested the Bus Lock Threshold functionality on nested guests. v1: https://lore.kernel.org/kvm/20240709175145.9986-4-manali.shukla@amd.com/T/ v2: https://lore.kernel.org/kvm/20241001063413.687787-4-manali.shukla@amd.com/T/ [1]: AMD64 Architecture Programmer's Manual Pub. 24593, April 2024, Vol 2, 15.14.5 Bus Lock Threshold. https://bugzilla.kernel.org/attachment.cgi?id=306250 Manali Shukla (2): x86/cpufeatures: Add CPUID feature bit for the Bus Lock Threshold KVM: X86: Add documentation about behavioral difference for KVM_EXIT_BUS_LOCK Nikunj A Dadhania (2): KVM: SVM: Enable Bus lock threshold exit KVM: selftests: Add bus lock exit test Documentation/virt/kvm/api.rst | 4 + arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/include/asm/svm.h | 5 +- arch/x86/include/uapi/asm/svm.h | 2 + arch/x86/kvm/svm/nested.c | 10 ++ arch/x86/kvm/svm/svm.c | 27 ++++ tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/x86_64/kvm_buslock_test.c | 130 ++++++++++++++++++ 8 files changed, 179 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/kvm/x86_64/kvm_buslock_test.c base-commit: efbc6bd090f48ccf64f7a8dd5daea775821d57ec -- 2.34.1

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Testing Quality Call notes - 2024-10-31

by Laura Nao

Hello, KernelCI is hosting a bi-weekly call on Thursday to discuss improvements to existing upstream tests, the development of new tests to increase kernel testing coverage, and the enablement of these tests in KernelCI. In recent months, we at Collabora have focused on various kernel areas, assessing the tests already available upstream and contributing patches to make them easily runnable in CIs. Below is a list of the tests we've been working on and their latest status updates, as discussed in the last meeting held on 2024-10-31: *Boot time test* - Sent v2: https://lore.kernel.org/all/20241018101439.20849-1-laura.nao@collabora.com/ - Changes in v2 driven by feedback received in the LPC session *ACPI probe kselftest* - RFCv2: https://lore.kernel.org/all/20240308144933.337107-1-laura.nao@collabora.com/ - Related upstream discussion on probe status tracking through printks: https://lore.kernel.org/lkml/dc7af563-530d-4e1f-bcbb-90bcfc2fe11a@stanley.m… Please reply to this thread if you'd like to join the call or discuss any of the topics further. We look forward to collaborating with the community to improve upstream tests and expand coverage to more areas of interest within the kernel. Best regards, Laura Nao

7 months, 4 weeks

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[PATCH net-next v2 0/4] Introduce VLAN support in HSR

by MD Danish Anwar

This series adds VLAN support to HSR framework. This series also adds VLAN support to HSR mode of ICSSG Ethernet driver. Changes from v1 to v2: *) Added patch 4/4 to add test script related to VLAN in HSR as asked by Lukasz Majewski <lukma(a)denx.de> v1 https://lore.kernel.org/all/20241004074715.791191-1-danishanwar@ti.com/ MD Danish Anwar (1): selftests: hsr: Add test for VLAN Murali Karicheri (1): net: hsr: Add VLAN CTAG filter support Ravi Gunasekaran (1): net: ti: icssg-prueth: Add VLAN support for HSR mode WingMan Kwok (1): net: hsr: Add VLAN support drivers/net/ethernet/ti/icssg/icssg_prueth.c | 45 +++++++++++- net/hsr/hsr_device.c | 76 ++++++++++++++++++-- net/hsr/hsr_forward.c | 19 +++-- tools/testing/selftests/net/hsr/config | 1 + tools/testing/selftests/net/hsr/hsr_ping.sh | 63 +++++++++++++++- 5 files changed, 191 insertions(+), 13 deletions(-) base-commit: 1bf70e6c3a5346966c25e0a1ff492945b25d3f80 -- 2.34.1

7 months, 4 weeks

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[PATCH net v6] ipv6: Fix soft lockups in fib6_select_path under high next hop churn

by Omid Ehtemam-Haghighi

Soft lockups have been observed on a cluster of Linux-based edge routers located in a highly dynamic environment. Using the `bird` service, these routers continuously update BGP-advertised routes due to frequently changing nexthop destinations, while also managing significant IPv6 traffic. The lockups occur during the traversal of the multipath circular linked-list in the `fib6_select_path` function, particularly while iterating through the siblings in the list. The issue typically arises when the nodes of the linked list are unexpectedly deleted concurrently on a different core—indicated by their 'next' and 'previous' elements pointing back to the node itself and their reference count dropping to zero. This results in an infinite loop, leading to a soft lockup that triggers a system panic via the watchdog timer. Apply RCU primitives in the problematic code sections to resolve the issue. Where necessary, update the references to fib6_siblings to annotate or use the RCU APIs. Include a test script that reproduces the issue. The script periodically updates the routing table while generating a heavy load of outgoing IPv6 traffic through multiple iperf3 clients. It consistently induces infinite soft lockups within a couple of minutes. Kernel log: 0 [ffffbd13003e8d30] machine_kexec at ffffffff8ceaf3eb 1 [ffffbd13003e8d90] __crash_kexec at ffffffff8d0120e3 2 [ffffbd13003e8e58] panic at ffffffff8cef65d4 3 [ffffbd13003e8ed8] watchdog_timer_fn at ffffffff8d05cb03 4 [ffffbd13003e8f08] __hrtimer_run_queues at ffffffff8cfec62f 5 [ffffbd13003e8f70] hrtimer_interrupt at ffffffff8cfed756 6 [ffffbd13003e8fd0] __sysvec_apic_timer_interrupt at ffffffff8cea01af 7 [ffffbd13003e8ff0] sysvec_apic_timer_interrupt at ffffffff8df1b83d -- <IRQ stack> -- 8 [ffffbd13003d3708] asm_sysvec_apic_timer_interrupt at ffffffff8e000ecb [exception RIP: fib6_select_path+299] RIP: ffffffff8ddafe7b RSP: ffffbd13003d37b8 RFLAGS: 00000287 RAX: ffff975850b43600 RBX: ffff975850b40200 RCX: 0000000000000000 RDX: 000000003fffffff RSI: 0000000051d383e4 RDI: ffff975850b43618 RBP: ffffbd13003d3800 R8: 0000000000000000 R9: ffff975850b40200 R10: 0000000000000000 R11: 0000000000000000 R12: ffffbd13003d3830 R13: ffff975850b436a8 R14: ffff975850b43600 R15: 0000000000000007 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 9 [ffffbd13003d3808] ip6_pol_route at ffffffff8ddb030c 10 [ffffbd13003d3888] ip6_pol_route_input at ffffffff8ddb068c 11 [ffffbd13003d3898] fib6_rule_lookup at ffffffff8ddf02b5 12 [ffffbd13003d3928] ip6_route_input at ffffffff8ddb0f47 13 [ffffbd13003d3a18] ip6_rcv_finish_core.constprop.0 at ffffffff8dd950d0 14 [ffffbd13003d3a30] ip6_list_rcv_finish.constprop.0 at ffffffff8dd96274 15 [ffffbd13003d3a98] ip6_sublist_rcv at ffffffff8dd96474 16 [ffffbd13003d3af8] ipv6_list_rcv at ffffffff8dd96615 17 [ffffbd13003d3b60] __netif_receive_skb_list_core at ffffffff8dc16fec 18 [ffffbd13003d3be0] netif_receive_skb_list_internal at ffffffff8dc176b3 19 [ffffbd13003d3c50] napi_gro_receive at ffffffff8dc565b9 20 [ffffbd13003d3c80] ice_receive_skb at ffffffffc087e4f5 [ice] 21 [ffffbd13003d3c90] ice_clean_rx_irq at ffffffffc0881b80 [ice] 22 [ffffbd13003d3d20] ice_napi_poll at ffffffffc088232f [ice] 23 [ffffbd13003d3d80] __napi_poll at ffffffff8dc18000 24 [ffffbd13003d3db8] net_rx_action at ffffffff8dc18581 25 [ffffbd13003d3e40] __do_softirq at ffffffff8df352e9 26 [ffffbd13003d3eb0] run_ksoftirqd at ffffffff8ceffe47 27 [ffffbd13003d3ec0] smpboot_thread_fn at ffffffff8cf36a30 28 [ffffbd13003d3ee8] kthread at ffffffff8cf2b39f 29 [ffffbd13003d3f28] ret_from_fork at ffffffff8ce5fa64 30 [ffffbd13003d3f50] ret_from_fork_asm at ffffffff8ce03cbb Fixes: 66f5d6ce53e6 ("ipv6: replace rwlock with rcu and spinlock in fib6_table") Reported-by: Adrian Oliver <kernel(a)aoliver.ca> Signed-off-by: Omid Ehtemam-Haghighi <omid.ehtemamhaghighi(a)menlosecurity.com> Cc: David S. Miller <davem(a)davemloft.net> Cc: David Ahern <dsahern(a)gmail.com> Cc: Eric Dumazet <edumazet(a)google.com> Cc: Jakub Kicinski <kuba(a)kernel.org> Cc: Paolo Abeni <pabeni(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Ido Schimmel <idosch(a)idosch.org> Cc: Kuniyuki Iwashima <kuniyu(a)amazon.com> Cc: Simon Horman <horms(a)kernel.org> Cc: netdev(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org --- v5 -> v6: * Adjust the comment line lengths in the test script to a maximum of 80 characters * Change memory allocation in inet6_rt_notify from gfp_any() to GFP_ATOMIC for atomic allocation in non-blocking contexts, as suggested by Ido Schimmel * NOTE: I have executed the test script on both bare-metal servers and virtualized environments such as QEMU and vng. In the case of bare-metal, it consistently triggers a soft lockup in under a minute on unpatched kernels. For the virtualized environments, an unpatched kernel compiled with the Ubuntu 24.04 configuration also triggers a soft lockup, though it takes longer; however, it did not trigger a soft lockup on kernels compiled with configurations provided in: https://github.com/linux-netdev/nipa/wiki/How-to-run-netdev-selftests-CI-st… leading to potential false negatives in the test results. I am curious if this test can be executed on a bare-metal machine within a CI system, if such a setup exists, rather than in a virtualized environment. If that’s not possible, how can I apply a different kernel configuration, such as the one used in Ubuntu 24.04, for this test? Please advise. v4 -> v5: * Addressed review comments from Paolo Abeni. * Added additional clarifying comments in the test script. * Minor cleanup performed in the test script. v3 -> v4: * Added RCU primitives to rt6_fill_node(). I found that this function is typically called either with a table lock held or within rcu_read_lock/rcu_read_unlock pairs, except in the following call chain, where the protection is unclear: rt_fill_node() fib6_info_hw_flags_set() mlxsw_sp_fib6_offload_failed_flag_set() mlxsw_sp_router_fib6_event_work() The last function is initialized as a work item in mlxsw_sp_router_fib_event() and scheduled for deferred execution. I am unsure if the execution context of this work item is protected by any table lock or rcu_read_lock/rcu_read_unlock pair, so I have added the protection. Please let me know if this is redundant. * Other review comments addressed v2 -> v3: * Removed redundant rcu_read_lock()/rcu_read_unlock() pairs * Revised the test script based on Ido Schimmel's feedback * Updated the test script to ensure compatibility with the latest iperf3 version * Fixed new warnings generated with 'C=2' in the previous version * Other review comments addressed v1 -> v2: * list_del_rcu() is applied exclusively to legacy multipath code * All occurrences of fib6_siblings have been modified to utilize RCU APIs for annotation and usage. * Additionally, a test script for reproducing the reported issue is included --- net/ipv6/ip6_fib.c | 8 +- net/ipv6/route.c | 45 ++- tools/testing/selftests/net/Makefile | 1 + .../net/ipv6_route_update_soft_lockup.sh | 262 ++++++++++++++++++ 4 files changed, 297 insertions(+), 19 deletions(-) create mode 100755 tools/testing/selftests/net/ipv6_route_update_soft_lockup.sh diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index eb111d20615c..9a1c59275a10 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -1190,8 +1190,8 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct fib6_info *rt, while (sibling) { if (sibling->fib6_metric == rt->fib6_metric && rt6_qualify_for_ecmp(sibling)) { - list_add_tail(&rt->fib6_siblings, - &sibling->fib6_siblings); + list_add_tail_rcu(&rt->fib6_siblings, + &sibling->fib6_siblings); break; } sibling = rcu_dereference_protected(sibling->fib6_next, @@ -1252,7 +1252,7 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct fib6_info *rt, fib6_siblings) sibling->fib6_nsiblings--; rt->fib6_nsiblings = 0; - list_del_init(&rt->fib6_siblings); + list_del_rcu(&rt->fib6_siblings); rt6_multipath_rebalance(next_sibling); return err; } @@ -1970,7 +1970,7 @@ static void fib6_del_route(struct fib6_table *table, struct fib6_node *fn, &rt->fib6_siblings, fib6_siblings) sibling->fib6_nsiblings--; rt->fib6_nsiblings = 0; - list_del_init(&rt->fib6_siblings); + list_del_rcu(&rt->fib6_siblings); rt6_multipath_rebalance(next_sibling); } diff --git a/net/ipv6/route.c b/net/ipv6/route.c index b4251915585f..b9b986bda943 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -413,8 +413,8 @@ void fib6_select_path(const struct net *net, struct fib6_result *res, struct flowi6 *fl6, int oif, bool have_oif_match, const struct sk_buff *skb, int strict) { - struct fib6_info *sibling, *next_sibling; struct fib6_info *match = res->f6i; + struct fib6_info *sibling; if (!match->nh && (!match->fib6_nsiblings || have_oif_match)) goto out; @@ -440,8 +440,8 @@ void fib6_select_path(const struct net *net, struct fib6_result *res, if (fl6->mp_hash <= atomic_read(&match->fib6_nh->fib_nh_upper_bound)) goto out; - list_for_each_entry_safe(sibling, next_sibling, &match->fib6_siblings, - fib6_siblings) { + list_for_each_entry_rcu(sibling, &match->fib6_siblings, + fib6_siblings) { const struct fib6_nh *nh = sibling->fib6_nh; int nh_upper_bound; @@ -5195,14 +5195,18 @@ static void ip6_route_mpath_notify(struct fib6_info *rt, * nexthop. Since sibling routes are always added at the end of * the list, find the first sibling of the last route appended */ + rcu_read_lock(); + if ((nlflags & NLM_F_APPEND) && rt_last && rt_last->fib6_nsiblings) { - rt = list_first_entry(&rt_last->fib6_siblings, - struct fib6_info, - fib6_siblings); + rt = list_first_or_null_rcu(&rt_last->fib6_siblings, + struct fib6_info, + fib6_siblings); } if (rt) inet6_rt_notify(RTM_NEWROUTE, rt, info, nlflags); + + rcu_read_unlock(); } static bool ip6_route_mpath_should_notify(const struct fib6_info *rt) @@ -5547,17 +5551,21 @@ static size_t rt6_nlmsg_size(struct fib6_info *f6i) nexthop_for_each_fib6_nh(f6i->nh, rt6_nh_nlmsg_size, &nexthop_len); } else { - struct fib6_info *sibling, *next_sibling; struct fib6_nh *nh = f6i->fib6_nh; + struct fib6_info *sibling; nexthop_len = 0; if (f6i->fib6_nsiblings) { rt6_nh_nlmsg_size(nh, &nexthop_len); - list_for_each_entry_safe(sibling, next_sibling, - &f6i->fib6_siblings, fib6_siblings) { + rcu_read_lock(); + + list_for_each_entry_rcu(sibling, &f6i->fib6_siblings, + fib6_siblings) { rt6_nh_nlmsg_size(sibling->fib6_nh, &nexthop_len); } + + rcu_read_unlock(); } nexthop_len += lwtunnel_get_encap_size(nh->fib_nh_lws); } @@ -5721,7 +5729,7 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb, lwtunnel_fill_encap(skb, dst->lwtstate, RTA_ENCAP, RTA_ENCAP_TYPE) < 0) goto nla_put_failure; } else if (rt->fib6_nsiblings) { - struct fib6_info *sibling, *next_sibling; + struct fib6_info *sibling; struct nlattr *mp; mp = nla_nest_start_noflag(skb, RTA_MULTIPATH); @@ -5733,14 +5741,21 @@ static int rt6_fill_node(struct net *net, struct sk_buff *skb, 0) < 0) goto nla_put_failure; - list_for_each_entry_safe(sibling, next_sibling, - &rt->fib6_siblings, fib6_siblings) { + rcu_read_lock(); + + list_for_each_entry_rcu(sibling, &rt->fib6_siblings, + fib6_siblings) { if (fib_add_nexthop(skb, &sibling->fib6_nh->nh_common, sibling->fib6_nh->fib_nh_weight, - AF_INET6, 0) < 0) + AF_INET6, 0) < 0) { + rcu_read_unlock(); + goto nla_put_failure; + } } + rcu_read_unlock(); + nla_nest_end(skb, mp); } else if (rt->nh) { if (nla_put_u32(skb, RTA_NH_ID, rt->nh->id)) @@ -6177,7 +6192,7 @@ void inet6_rt_notify(int event, struct fib6_info *rt, struct nl_info *info, err = -ENOBUFS; seq = info->nlh ? info->nlh->nlmsg_seq : 0; - skb = nlmsg_new(rt6_nlmsg_size(rt), gfp_any()); + skb = nlmsg_new(rt6_nlmsg_size(rt), GFP_ATOMIC); if (!skb) goto errout; @@ -6190,7 +6205,7 @@ void inet6_rt_notify(int event, struct fib6_info *rt, struct nl_info *info, goto errout; } rtnl_notify(skb, net, info->portid, RTNLGRP_IPV6_ROUTE, - info->nlh, gfp_any()); + info->nlh, GFP_ATOMIC); return; errout: rtnl_set_sk_err(net, RTNLGRP_IPV6_ROUTE, err); diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index 649f1fe0dc46..88cbac27aa10 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -96,6 +96,7 @@ TEST_PROGS += fdb_flush.sh TEST_PROGS += fq_band_pktlimit.sh TEST_PROGS += vlan_hw_filter.sh TEST_PROGS += bpf_offload.py +TEST_PROGS += ipv6_route_update_soft_lockup.sh # YNL files, must be before "include ..lib.mk" EXTRA_CLEAN += $(OUTPUT)/libynl.a diff --git a/tools/testing/selftests/net/ipv6_route_update_soft_lockup.sh b/tools/testing/selftests/net/ipv6_route_update_soft_lockup.sh new file mode 100755 index 000000000000..c61a7a8352cf --- /dev/null +++ b/tools/testing/selftests/net/ipv6_route_update_soft_lockup.sh @@ -0,0 +1,262 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Testing for potential kernel soft lockup during IPv6 routing table +# refresh under heavy outgoing IPv6 traffic. If a kernel soft lockup +# occurs, a kernel panic will be triggered to prevent associated issues. +# +# +# Test Environment Layout +# +# ┌----------------┐ ┌----------------┐ +# | SOURCE_NS | | SINK_NS | +# | NAMESPACE | | NAMESPACE | +# |(iperf3 clients)| |(iperf3 servers)| +# | | | | +# | | | | +# | ┌-----------| nexthops |---------┐ | +# | |veth_source|<--------------------------------------->|veth_sink|<┐ | +# | └-----------|2001:0DB8:1::0:1/96 2001:0DB8:1::1:1/96 |---------┘ | | +# | | ^ 2001:0DB8:1::1:2/96 | | | +# | | . . | fwd | | +# | ┌---------┐ | . . | | | +# | | IPv6 | | . . | V | +# | | routing | | . 2001:0DB8:1::1:80/96| ┌-----┐ | +# | | table | | . | | lo | | +# | | nexthop | | . └--------┴-----┴-┘ +# | | update | | ............................> 2001:0DB8:2::1:1/128 +# | └-------- ┘ | +# └----------------┘ +# +# The test script sets up two network namespaces, source_ns and sink_ns, +# connected via a veth link. Within source_ns, it continuously updates the +# IPv6 routing table by flushing and inserting IPV6_NEXTHOP_ADDR_COUNT nexthop +# IPs destined for SINK_LOOPBACK_IP_ADDR in sink_ns. This refresh occurs at a +# rate of 1/ROUTING_TABLE_REFRESH_PERIOD per second for TEST_DURATION seconds. +# +# Simultaneously, multiple iperf3 clients within source_ns generate heavy +# outgoing IPv6 traffic. Each client is assigned a unique port number starting +# at 5000 and incrementing sequentially. Each client targets a unique iperf3 +# server running in sink_ns, connected to the SINK_LOOPBACK_IFACE interface +# using the same port number. +# +# The number of iperf3 servers and clients is set to half of the total +# available cores on each machine. +# +# NOTE: We have tested this script on machines with various CPU specifications, +# ranging from lower to higher performance as listed below. The test script +# effectively triggered a kernel soft lockup on machines running an unpatched +# kernel in under a minute: +# +# - 1x Intel Xeon E-2278G 8-Core Processor @ 3.40GHz +# - 1x Intel Xeon E-2378G Processor 8-Core @ 2.80GHz +# - 1x AMD EPYC 7401P 24-Core Processor @ 2.00GHz +# - 1x AMD EPYC 7402P 24-Core Processor @ 2.80GHz +# - 2x Intel Xeon Gold 5120 14-Core Processor @ 2.20GHz +# - 1x Ampere Altra Q80-30 80-Core Processor @ 3.00GHz +# - 2x Intel Xeon Gold 5120 14-Core Processor @ 2.20GHz +# - 2x Intel Xeon Silver 4214 24-Core Processor @ 2.20GHz +# - 1x AMD EPYC 7502P 32-Core @ 2.50GHz +# - 1x Intel Xeon Gold 6314U 32-Core Processor @ 2.30GHz +# - 2x Intel Xeon Gold 6338 32-Core Processor @ 2.00GHz +# +# On less performant machines, you may need to increase the TEST_DURATION +# parameter to enhance the likelihood of encountering a race condition leading +# to a kernel soft lockup and avoid a false negative result. +# +# NOTE: The test may not produce the expected result in virtualized +# environments (e.g., qemu) due to differences in timing and CPU handling, +# which can affect the conditions needed to trigger a soft lockup. + +source lib.sh +source net_helper.sh + +TEST_DURATION=300 +ROUTING_TABLE_REFRESH_PERIOD=0.01 + +IPERF3_BITRATE="300m" + + +IPV6_NEXTHOP_ADDR_COUNT="128" +IPV6_NEXTHOP_ADDR_MASK="96" +IPV6_NEXTHOP_PREFIX="2001:0DB8:1" + + +SOURCE_TEST_IFACE="veth_source" +SOURCE_TEST_IP_ADDR="2001:0DB8:1::0:1/96" + +SINK_TEST_IFACE="veth_sink" +# ${SINK_TEST_IFACE} is populated with the following range of IPv6 addresses: +# 2001:0DB8:1::1:1 to 2001:0DB8:1::1:${IPV6_NEXTHOP_ADDR_COUNT} +SINK_LOOPBACK_IFACE="lo" +SINK_LOOPBACK_IP_MASK="128" +SINK_LOOPBACK_IP_ADDR="2001:0DB8:2::1:1" + +nexthop_ip_list="" +termination_signal="" +kernel_softlokup_panic_prev_val="" + +terminate_ns_processes_by_pattern() { + local ns=$1 + local pattern=$2 + + for pid in $(ip netns pids ${ns}); do + [ -e /proc/$pid/cmdline ] && grep -qe "${pattern}" /proc/$pid/cmdline && kill -9 $pid + done +} + +cleanup() { + echo "info: cleaning up namespaces and terminating all processes within them..." + + + # Terminate iperf3 instances running in the source_ns. To avoid race + # conditions, first iterate over the PIDs and terminate those + # associated with the bash shells running the + # `while true; do iperf3 -c ...; done` loops. In a second iteration, + # terminate the individual `iperf3 -c ...` instances. + terminate_ns_processes_by_pattern ${source_ns} while + terminate_ns_processes_by_pattern ${source_ns} iperf3 + + # Repeat the same process for sink_ns + terminate_ns_processes_by_pattern ${sink_ns} while + terminate_ns_processes_by_pattern ${sink_ns} iperf3 + + # Check if any iperf3 instances are still running. This could happen + # if a core has entered an infinite loop and the timeout for detecting + # the soft lockup has not expired, but either the test interval has + # already elapsed or the test was terminated manually (e.g., with ^C) + for pid in $(ip netns pids ${source_ns}); do + if [ -e /proc/$pid/cmdline ] && grep -qe 'iperf3' /proc/$pid/cmdline; then + echo "FAIL: unable to terminate some iperf3 instances. Soft lockup is underway. A kernel panic is on the way!" + exit ${ksft_fail} + fi + done + + if [ "$termination_signal" == "SIGINT" ]; then + echo "SKIP: Termination due to ^C (SIGINT)" + elif [ "$termination_signal" == "SIGALRM" ]; then + echo "PASS: No kernel soft lockup occurred during this ${TEST_DURATION} second test" + fi + + cleanup_ns ${source_ns} ${sink_ns} + + sysctl -qw kernel.softlockup_panic=${kernel_softlokup_panic_prev_val} +} + +setup_prepare() { + setup_ns source_ns sink_ns + + ip -n ${source_ns} link add name ${SOURCE_TEST_IFACE} type veth peer name ${SINK_TEST_IFACE} netns ${sink_ns} + + # Setting up the Source namespace + ip -n ${source_ns} addr add ${SOURCE_TEST_IP_ADDR} dev ${SOURCE_TEST_IFACE} + ip -n ${source_ns} link set dev ${SOURCE_TEST_IFACE} qlen 10000 + ip -n ${source_ns} link set dev ${SOURCE_TEST_IFACE} up + ip netns exec ${source_ns} sysctl -qw net.ipv6.fib_multipath_hash_policy=1 + + # Setting up the Sink namespace + ip -n ${sink_ns} addr add ${SINK_LOOPBACK_IP_ADDR}/${SINK_LOOPBACK_IP_MASK} dev ${SINK_LOOPBACK_IFACE} + ip -n ${sink_ns} link set dev ${SINK_LOOPBACK_IFACE} up + ip netns exec ${sink_ns} sysctl -qw net.ipv6.conf.${SINK_LOOPBACK_IFACE}.forwarding=1 + + ip -n ${sink_ns} link set ${SINK_TEST_IFACE} up + ip netns exec ${sink_ns} sysctl -qw net.ipv6.conf.${SINK_TEST_IFACE}.forwarding=1 + + + # Populate nexthop IPv6 addresses on the test interface in the sink_ns + echo "info: populating ${IPV6_NEXTHOP_ADDR_COUNT} IPv6 addresses on the ${SINK_TEST_IFACE} interface ..." + for IP in $(seq 1 ${IPV6_NEXTHOP_ADDR_COUNT}); do + ip -n ${sink_ns} addr add ${IPV6_NEXTHOP_PREFIX}::$(printf "1:%x" "${IP}")/${IPV6_NEXTHOP_ADDR_MASK} dev ${SINK_TEST_IFACE}; + done + + # Preparing list of nexthops + for IP in $(seq 1 ${IPV6_NEXTHOP_ADDR_COUNT}); do + nexthop_ip_list=$nexthop_ip_list" nexthop via ${IPV6_NEXTHOP_PREFIX}::$(printf "1:%x" $IP) dev ${SOURCE_TEST_IFACE} weight 1" + done +} + + +test_soft_lockup_during_routing_table_refresh() { + # Start num_of_iperf_servers iperf3 servers in the sink_ns namespace, + # each listening on ports starting at 5001 and incrementing + # sequentially. Since iperf3 instances may terminate unexpectedly, a + # while loop is used to automatically restart them in such cases. + echo "info: starting ${num_of_iperf_servers} iperf3 servers in the sink_ns namespace ..." + for i in $(seq 1 ${num_of_iperf_servers}); do + cmd="iperf3 --bind ${SINK_LOOPBACK_IP_ADDR} -s -p $(printf '5%03d' ${i}) --rcv-timeout 200 &>/dev/null" + ip netns exec ${sink_ns} bash -c "while true; do ${cmd}; done &" &>/dev/null + done + + # Wait for the iperf3 servers to be ready + for i in $(seq ${num_of_iperf_servers}); do + port=$(printf '5%03d' ${i}); + wait_local_port_listen ${sink_ns} ${port} tcp + done + + # Continuously refresh the routing table in the background within + # the source_ns namespace + ip netns exec ${source_ns} bash -c " + while \$(ip netns list | grep -q ${source_ns}); do + ip -6 route add ${SINK_LOOPBACK_IP_ADDR}/${SINK_LOOPBACK_IP_MASK} ${nexthop_ip_list}; + sleep ${ROUTING_TABLE_REFRESH_PERIOD}; + ip -6 route delete ${SINK_LOOPBACK_IP_ADDR}/${SINK_LOOPBACK_IP_MASK}; + done &" + + # Start num_of_iperf_servers iperf3 clients in the source_ns namespace, + # each sending TCP traffic on sequential ports starting at 5001. + # Since iperf3 instances may terminate unexpectedly (e.g., if the route + # to the server is deleted in the background during a route refresh), a + # while loop is used to automatically restart them in such cases. + echo "info: starting ${num_of_iperf_servers} iperf3 clients in the source_ns namespace ..." + for i in $(seq 1 ${num_of_iperf_servers}); do + cmd="iperf3 -c ${SINK_LOOPBACK_IP_ADDR} -p $(printf '5%03d' ${i}) --length 64 --bitrate ${IPERF3_BITRATE} -t 0 --connect-timeout 150 &>/dev/null" + ip netns exec ${source_ns} bash -c "while true; do ${cmd}; done &" &>/dev/null + done + + echo "info: IPv6 routing table is being updated at the rate of $(echo "1/${ROUTING_TABLE_REFRESH_PERIOD}" | bc)/s for ${TEST_DURATION} seconds ..." + echo "info: A kernel soft lockup, if detected, results in a kernel panic!" + + wait +} + +# Make sure 'iperf3' is installed, skip the test otherwise +if [ ! -x "$(command -v "iperf3")" ]; then + echo "SKIP: 'iperf3' is not installed. Skipping the test." + exit ${ksft_skip} +fi + +# Determine the number of cores on the machine +num_of_iperf_servers=$(( $(nproc)/2 )) + +# Check if we are running on a multi-core machine, skip the test otherwise +if [ "${num_of_iperf_servers}" -eq 0 ]; then + echo "SKIP: This test is not valid on a single core machine!" + exit ${ksft_skip} +fi + +# Since the kernel soft lockup we're testing causes at least one core to enter +# an infinite loop, destabilizing the host and likely affecting subsequent +# tests, we trigger a kernel panic instead of reporting a failure and +# continuing +kernel_softlokup_panic_prev_val=$(sysctl -n kernel.softlockup_panic) +sysctl -qw kernel.softlockup_panic=1 + +handle_sigint() { + termination_signal="SIGINT" + cleanup + exit ${ksft_skip} +} + +handle_sigalrm() { + termination_signal="SIGALRM" + cleanup + exit ${ksft_pass} +} + +trap handle_sigint SIGINT +trap handle_sigalrm SIGALRM + +(sleep ${TEST_DURATION} && kill -s SIGALRM $$)& + +setup_prepare +test_soft_lockup_during_routing_table_refresh -- 2.43.0

7 months, 4 weeks

3
3
0 0

[PATCH v4] selftests: clone3: Use the capget and capset syscall directly

by zhouyuhang

From: zhouyuhang <zhouyuhang(a)kylinos.cn> The libcap commit aca076443591 ("Make cap_t operations thread safe.") added a __u8 mutex at the beginning of the struct _cap_struct, it changes the offset of the members in the structure that breaks the assumption made in the "struct libcap" definition in clone3_cap_checkpoint_restore.c. This causes the call to cap_set_proc here to fail with error code EPERM, and the output is as follows: # RUN global.clone3_cap_checkpoint_restore ... # clone3() syscall supported # clone3_cap_checkpoint_restore.c:151:clone3_cap_checkpoint_restore:Child has PID 130508 cap_set_proc: Operation not permitted # clone3_cap_checkpoint_restore.c:160:clone3_cap_checkpoint_restore:Expected set_capability() (-1) == 0 (0) # clone3_cap_checkpoint_restore.c:161:clone3_cap_checkpoint_restore:Could not set CAP_CHECKPOINT_RESTORE # clone3_cap_checkpoint_restore: Test terminated by assertion # FAIL global.clone3_cap_checkpoint_restore Changing to using capget and capset syscall directly here can fix this error, just like what the commit 663af70aabb7 ("bpf: selftests: Add helpers to directly use the capget and capset syscall") does. The output is as follows: # RUN global.clone3_cap_checkpoint_restore ... # clone3() syscall supported # clone3_cap_checkpoint_restore.c:160:clone3_cap_checkpoint_restore:Child has PID 23708 # clone3_cap_checkpoint_restore.c:91:clone3_cap_checkpoint_restore:[23707] Trying clone3() with CLONE_SET_TID to 23708 # clone3_cap_checkpoint_restore.c:58:clone3_cap_checkpoint_restore:Operation not permitted - Failed to create new process # clone3_cap_checkpoint_restore.c:93:clone3_cap_checkpoint_restore:[23707] clone3() with CLONE_SET_TID 23708 says:-1 # clone3_cap_checkpoint_restore.c:91:clone3_cap_checkpoint_restore:[23707] Trying clone3() with CLONE_SET_TID to 23708 # clone3_cap_checkpoint_restore.c:73:clone3_cap_checkpoint_restore:I am the parent (23707). My child's pid is 23708 # clone3_cap_checkpoint_restore.c:66:clone3_cap_checkpoint_restore:I am the child, my PID is 23708 (expected 23708) # clone3_cap_checkpoint_restore.c:93:clone3_cap_checkpoint_restore:[23707] clone3() with CLONE_SET_TID 23708 says:0 # OK global.clone3_cap_checkpoint_restore ok 1 global.clone3_cap_checkpoint_restore # PASSED: 1 / 1 tests passed. Signed-off-by: zhouyuhang <zhouyuhang(a)kylinos.cn> --- v4: * Add some comments and modify the output and return value when set_capability fails v3: * Remove locally declared system calls and retained the - lcap in the Makefile. v2: * Move locally declared system calls to header file. v1: * Directly using capget and capset and declare them locally. --- .../clone3/clone3_cap_checkpoint_restore.c | 77 +++++++++++-------- 1 file changed, 43 insertions(+), 34 deletions(-) diff --git a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c index 3c196fa86c99..076f9d4cce60 100644 --- a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c +++ b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c @@ -27,6 +27,13 @@ #include "../kselftest_harness.h" #include "clone3_selftests.h" +/* + * Prevent not being defined in the header file + */ +#ifndef CAP_CHECKPOINT_RESTORE +#define CAP_CHECKPOINT_RESTORE 40 +#endif + static void child_exit(int ret) { fflush(stdout); @@ -87,47 +94,49 @@ static int test_clone3_set_tid(struct __test_metadata *_metadata, return ret; } -struct libcap { - struct __user_cap_header_struct hdr; +static int set_capability(struct __test_metadata *_metadata) +{ struct __user_cap_data_struct data[2]; -}; -static int set_capability(void) -{ - cap_value_t cap_values[] = { CAP_SETUID, CAP_SETGID }; - struct libcap *cap; - int ret = -1; - cap_t caps; - - caps = cap_get_proc(); - if (!caps) { - perror("cap_get_proc"); - return -1; - } + /* + * Only _LINUX_CAPABILITY_VERSION_3 can be used here. + * _LINUX_CAPABILITY_VERSION_1 represents use 32-bit capabilities, + * using it will cause CAP_CHECKPOINT_RESTORE to not be set. + * _LINUX_CAPABILITY_VERSION_2 has already been deprecated. + */ + struct __user_cap_header_struct hdr = { + .version = _LINUX_CAPABILITY_VERSION_3, + }; - /* Drop all capabilities */ - if (cap_clear(caps)) { - perror("cap_clear"); - goto out; + /* + * CAP_CHECKPOINT_RESTORE is greater than 31, so we need two u32. + * cap0 is the lower 32bit and cap1 is the higher 32bit, they will + * be combined into a u64 in mk_kernel_cap. + */ + __u32 cap0 = 1 << CAP_SETUID | 1 << CAP_SETGID; + __u32 cap1 = 1 << (CAP_CHECKPOINT_RESTORE - 32); + int ret; + + ret = capget(&hdr, data); + if (ret) { + TH_LOG("%s - Failed to get capability", strerror(errno)); + return -errno; } - cap_set_flag(caps, CAP_EFFECTIVE, 2, cap_values, CAP_SET); - cap_set_flag(caps, CAP_PERMITTED, 2, cap_values, CAP_SET); + /* Drop all capabilities */ + memset(&data, 0, sizeof(data)); - cap = (struct libcap *) caps; + data[0].effective |= cap0; + data[0].permitted |= cap0; - /* 40 -> CAP_CHECKPOINT_RESTORE */ - cap->data[1].effective |= 1 << (40 - 32); - cap->data[1].permitted |= 1 << (40 - 32); + data[1].effective |= cap1; + data[1].permitted |= cap1; - if (cap_set_proc(caps)) { - perror("cap_set_proc"); - goto out; + ret = capset(&hdr, data); + if (ret) { + TH_LOG("%s - Failed to set capability", strerror(errno)); + return -errno; } - ret = 0; -out: - if (cap_free(caps)) - perror("cap_free"); return ret; } @@ -157,7 +166,7 @@ TEST(clone3_cap_checkpoint_restore) /* After the child has finished, its PID should be free. */ set_tid[0] = pid; - ASSERT_EQ(set_capability(), 0) + ASSERT_EQ(set_capability(_metadata), 0) TH_LOG("Could not set CAP_CHECKPOINT_RESTORE"); ASSERT_EQ(prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0), 0); @@ -169,7 +178,7 @@ TEST(clone3_cap_checkpoint_restore) set_tid[0] = pid; /* This would fail without CAP_CHECKPOINT_RESTORE */ ASSERT_EQ(test_clone3_set_tid(_metadata, set_tid, 1), -EPERM); - ASSERT_EQ(set_capability(), 0) + ASSERT_EQ(set_capability(_metadata), 0) TH_LOG("Could not set CAP_CHECKPOINT_RESTORE"); /* This should work as we have CAP_CHECKPOINT_RESTORE as non-root */ ASSERT_EQ(test_clone3_set_tid(_metadata, set_tid, 1), 0); -- 2.27.0

7 months, 4 weeks

1
0
0 0

[PATCH] KVM: selftests: memslot_perf_test: increase guest sync timeout

by Maxim Levitsky

When memslot_perf_test is run nested, first iteration of test_memslot_rw_loop testcase, sometimes takes more than 2 seconds due to build of shadow page tables. Following iterations are fast. To be on the safe side, bump the timeout to 10 seconds. Signed-off-by: Maxim Levitsky <mlevitsk(a)redhat.com> --- tools/testing/selftests/kvm/memslot_perf_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/memslot_perf_test.c b/tools/testing/selftests/kvm/memslot_perf_test.c index 893366982f77b..e9189cbed4bb6 100644 --- a/tools/testing/selftests/kvm/memslot_perf_test.c +++ b/tools/testing/selftests/kvm/memslot_perf_test.c @@ -415,7 +415,7 @@ static bool _guest_should_exit(void) */ static noinline void host_perform_sync(struct sync_area *sync) { - alarm(2); + alarm(10); atomic_store_explicit(&sync->sync_flag, true, memory_order_release); while (atomic_load_explicit(&sync->sync_flag, memory_order_acquire)) -- 2.26.3

7 months, 4 weeks

3
3
0 0

[PATCH] kvm: selftest: fix noop test in guest_memfd_test.c

by Patrick Roy

The loop in test_create_guest_memfd_invalid that is supposed to test that nothing is accepted as a valid flag to KVM_CREATE_GUEST_MEMFD was initializing `flag` as 0 instead of BIT(0). This caused the loop to immediately exit instead of iterating over BIT(0), BIT(1), ... . Fixes: 8a89efd43423 ("KVM: selftests: Add basic selftest for guest_memfd()") Signed-off-by: Patrick Roy <roypat(a)amazon.co.uk> --- tools/testing/selftests/kvm/guest_memfd_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/guest_memfd_test.c b/tools/testing/selftests/kvm/guest_memfd_test.c index ba0c8e9960358..ce687f8d248fc 100644 --- a/tools/testing/selftests/kvm/guest_memfd_test.c +++ b/tools/testing/selftests/kvm/guest_memfd_test.c @@ -134,7 +134,7 @@ static void test_create_guest_memfd_invalid(struct kvm_vm *vm) size); } - for (flag = 0; flag; flag <<= 1) { + for (flag = BIT(0); flag; flag <<= 1) { fd = __vm_create_guest_memfd(vm, page_size, flag); TEST_ASSERT(fd == -1 && errno == EINVAL, "guest_memfd() with flag '0x%lx' should fail with EINVAL", -- 2.47.0

7 months, 4 weeks

4
4
0 0

[PATCH v3 0/9] SEV Kernel Selftests

by Pratik R. Sampat

This series primarily introduces SEV-SNP test for the kernel selftest framework. It tests boot, ioctl, pre fault, and fallocate in various combinations to exercise both positive and negative launch flow paths. Patch 1 - Adds a wrapper for the ioctl calls that decouple ioctl and asserts, which enables the use of negative test cases. No functional change intended. Patch 2 - Extend the sev smoke tests to use the SNP specific ioctl calls and sets up memory to boot a SNP guest VM Patch 3 - Adds SNP to shutdown testing Patch 4, 5 - Tests the ioctl path for SEV, SEV-ES and SNP Patch 6 - Adds support for SNP in KVM_SEV_INIT2 tests Patch 7,8,9 - Enable Prefault tests for SEV, SEV-ES and SNP The patchset is rebased on top of kvm-x86/next branch. v3: 1. Remove the assignments for the prefault and fallocate test type enums. 2. Fix error message for sev launch measure and finish. 3. Collect tested-by tags [Peter, Srikanth] v2: https://lore.kernel.org/kvm/20240816192310.117456-1-pratikrajesh.sampat@amd… 1. Add SMT parsing check to populate SNP policy flags 2. Extend Peter Gonda's shutdown test to include SNP 3. Introduce new tests for prefault which include exercising prefault, fallocate, hole-punch in various combinations. 4. Decouple ioctl patch reworked to introduce private variants of the the functions that call into the ioctl. Also reordered the patch for it to arrive first so that new APIs are not written right after their introduction. 5. General cleanups - adding comments, avoiding local booleans, better error message. Suggestions incorporated from Peter, Tom, and Sean. RFC: https://lore.kernel.org/kvm/20240710220540.188239-1-pratikrajesh.sampat@amd… Any feedback/review is highly appreciated! Michael Roth (2): KVM: selftests: Add interface to manually flag protected/encrypted ranges KVM: selftests: Add a CoCo-specific test for KVM_PRE_FAULT_MEMORY Pratik R. Sampat (7): KVM: selftests: Decouple SEV ioctls from asserts KVM: selftests: Add a basic SNP smoke test KVM: selftests: Add SNP to shutdown testing KVM: selftests: SEV IOCTL test KVM: selftests: SNP IOCTL test KVM: selftests: SEV-SNP test for KVM_SEV_INIT2 KVM: selftests: Interleave fallocate for KVM_PRE_FAULT_MEMORY tools/testing/selftests/kvm/Makefile | 1 + .../testing/selftests/kvm/include/kvm_util.h | 13 + .../selftests/kvm/include/x86_64/processor.h | 1 + .../selftests/kvm/include/x86_64/sev.h | 76 +++- tools/testing/selftests/kvm/lib/kvm_util.c | 53 ++- .../selftests/kvm/lib/x86_64/processor.c | 6 +- tools/testing/selftests/kvm/lib/x86_64/sev.c | 190 +++++++- .../kvm/x86_64/coco_pre_fault_memory_test.c | 421 ++++++++++++++++++ .../selftests/kvm/x86_64/sev_init2_tests.c | 13 + .../selftests/kvm/x86_64/sev_smoke_test.c | 297 +++++++++++- 10 files changed, 1023 insertions(+), 48 deletions(-) create mode 100644 tools/testing/selftests/kvm/x86_64/coco_pre_fault_memory_test.c -- 2.34.1

7 months, 4 weeks

2
27
0 0

kselftest/next kselftest-lkdtm: 1 runs, 1 regressions (v6.12-rc3-23-ga44c26d7fa74)

by kernelci.org bot

kselftest/next kselftest-lkdtm: 1 runs, 1 regressions (v6.12-rc3-23-ga44c26d7fa74) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.12-rc3-23-ga4… Test: kselftest-lkdtm Tree: kselftest Branch: next Describe: v6.12-rc3-23-ga44c26d7fa74 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: a44c26d7fa74a5f4d2795a5c55a2d6ec1ebf1e38 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/67297a56d7f1f585c1c86864 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: multi_v7_defconfig+kselftest Compiler: gcc-12 (arm-linux-gnueabihf-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/next/v6.12-rc3-23-ga44c26d7fa74/arm… HTML log: https://storage.kernelci.org//kselftest/next/v6.12-rc3-23-ga44c26d7fa74/arm… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-lkdtm.login: https://kernelci.org/test/case/id/67297a57d7f1f585c1c86865 failing since 97 days (last pass: v6.10-rc7-29-gdf09b0bb09ea, first fail: v6.11-rc1)

7 months, 4 weeks

1
0
0 0

kselftest/next kselftest-seccomp: 1 runs, 1 regressions (v6.12-rc3-23-ga44c26d7fa74)

by kernelci.org bot

kselftest/next kselftest-seccomp: 1 runs, 1 regressions (v6.12-rc3-23-ga44c26d7fa74) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.12-rc3-23-ga4… Test: kselftest-seccomp Tree: kselftest Branch: next Describe: v6.12-rc3-23-ga44c26d7fa74 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: a44c26d7fa74a5f4d2795a5c55a2d6ec1ebf1e38 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/67297bfb8d4223d56ec86863 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: multi_v7_defconfig+kselftest Compiler: gcc-12 (arm-linux-gnueabihf-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/next/v6.12-rc3-23-ga44c26d7fa74/arm… HTML log: https://storage.kernelci.org//kselftest/next/v6.12-rc3-23-ga44c26d7fa74/arm… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-seccomp.login: https://kernelci.org/test/case/id/67297bfb8d4223d56ec86864 failing since 97 days (last pass: v6.10-rc7-29-gdf09b0bb09ea, first fail: v6.11-rc1)

7 months, 4 weeks

1
0
0 0

kselftest/next kselftest-lib: 1 runs, 1 regressions (v6.12-rc3-23-ga44c26d7fa74)

by kernelci.org bot

kselftest/next kselftest-lib: 1 runs, 1 regressions (v6.12-rc3-23-ga44c26d7fa74) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.12-rc3-23-ga4… Test: kselftest-lib Tree: kselftest Branch: next Describe: v6.12-rc3-23-ga44c26d7fa74 URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: a44c26d7fa74a5f4d2795a5c55a2d6ec1ebf1e38 Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/672978b37de8409f75c8685a Results: 0 PASS, 1 FAIL, 0 SKIP Full config: multi_v7_defconfig+kselftest Compiler: gcc-12 (arm-linux-gnueabihf-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/next/v6.12-rc3-23-ga44c26d7fa74/arm… HTML log: https://storage.kernelci.org//kselftest/next/v6.12-rc3-23-ga44c26d7fa74/arm… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-lib.login: https://kernelci.org/test/case/id/672978b37de8409f75c8685b failing since 97 days (last pass: v6.10-rc7-29-gdf09b0bb09ea, first fail: v6.11-rc1)

7 months, 4 weeks

1
0
0 0

kselftest/next build: 6 builds: 2 failed, 4 passed, 1 warning (v6.12-rc3-23-ga44c26d7fa74)

by kernelci.org bot

kselftest/next build: 6 builds: 2 failed, 4 passed, 1 warning (v6.12-rc3-23-ga44c26d7fa74) Full Build Summary: https://kernelci.org/build/kselftest/branch/next/kernel/v6.12-rc3-23-ga44c2… Tree: kselftest Branch: next Git Describe: v6.12-rc3-23-ga44c26d7fa74 Git Commit: a44c26d7fa74a5f4d2795a5c55a2d6ec1ebf1e38 Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 --- For more info write to <info(a)kernelci.org>

7 months, 4 weeks

1
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[PATCH V4 00/15] selftests/resctrl: Support diverse platforms with MBM and MBA tests

by Reinette Chatre

Changes since V3: - V3: https://lore.kernel.org/all/cover.1729218182.git.reinette.chatre@intel.com/ - Rebased on HEAD 2a027d6bb660 of kselftest/next. - Fix empty string parsing issues pointed out by Ilpo. - Add Reviewed-by tags. - Please see individual patches for detailed changes. Changes since V2: - V2: https://lore.kernel.org/all/cover.1726164080.git.reinette.chatre@intel.com/ - Add fix to protect against buffer overflow when parsing text from sysfs files. - Add cleanup patch to address use of magic constants as pointed out by Ilpo. - Add Reviewed-by tags where received, except for "selftests/resctrl: Use cache size to determine "fill_buf" buffer size" that changed too much since receiving the Reviewed-by tag. - Please see individual patches for detailed changes. Changes since V1: - V1: https://lore.kernel.org/cover.1724970211.git.reinette.chatre@intel.com/ - V2 contains the same general solutions to stated problem as V1 but these are now preceded by more fixes (patches 1 to 5) and improved robustness (patches 6 to 9) to existing tests before the series gets back to solving the original problem with more confidence in patches 10 to 13. - The posibility of making "memflush = false" for CMT test was discussed during V1. Modifying this setting does not have a significant impact on the observed results that are already well within acceptable range and this version thus keeps original default. If performance was a goal it may be possible to do further experimentation where "memflush = false" could eliminate the need for the sleep(1) within the test wrapper, but improving the performance is not a goal of this work. - (New) Support what seems to be unintended ability for user space to provide parameters to "fill_buf" by making the parsing robust and only support changing parameters that are supported to be changed. Drop support for "write" operation since it has never been measured. - (New) Improve wraparound handling. (Ilpo) - (New) A couple of new fixes addressing issues discovered during development. - (Change from V1) To support fill_buf parameters provided by user space as well as test specific fill_buf parameters struct fill_buf_param is no longer just a member of struct resctrl_val_param, instead there could be at most two instances of struct fill_buf_param, the immutable parameters provided by user space and the parameters used by individual tests. (Ilpo) - Please see individual patches for detailed changes. V1 cover: The resctrl selftests for Memory Bandwidth Allocation (MBA) and Memory Bandwidth Monitoring (MBM) are failing on some (for example [1]) Emerald Rapids systems. The test failures result from the following two properties of these systems: 1) Emerald Rapids systems can have up to 320MB L3 cache. The resctrl MBA and MBM selftests measure memory traffic for which a hardcoded 250MB buffer has been sufficient so far. On platforms with L3 cache larger than the buffer, the buffer fits in the L3 cache and thus no/very little memory traffic is generated during the "memory bandwidth" tests. 2) Some platform features, for example RAS features or memory performance features that generate memory traffic may drive accesses that are counted differently by performance counters and MBM respectively, for instance generating "overhead" traffic which is not counted against any specific RMID. Until now these counting differences have always been "in the noise". On Emerald Rapids systems the maximum MBA throttling (10% memory bandwidth) throttles memory bandwidth to where memory accesses by these other platform features push the memory bandwidth difference between memory controller performance counters and resctrl (MBM) beyond the tests' hardcoded tolerance. Make the tests more robust against platform variations: 1) Let the buffer used by memory bandwidth tests be guided by the size of the L3 cache. 2) Larger buffers require longer initialization time before the buffer can be used to measurement. Rework the tests to ensure that buffer initialization is complete before measurements start. 3) Do not compare performance counters and MBM measurements at low bandwidth. The value of "low" is hardcoded to 750MiB based on measurements on Emerald Rapids, Sapphire Rapids, and Ice Lake systems. This limit is not applicable to AMD systems since it only applies to the MBA and MBM tests that are isolated to Intel. [1] https://ark.intel.com/content/www/us/en/ark/products/237261/intel-xeon-plat… Reinette Chatre (15): selftests/resctrl: Make functions only used in same file static selftests/resctrl: Print accurate buffer size as part of MBM results selftests/resctrl: Fix memory overflow due to unhandled wraparound selftests/resctrl: Protect against array overrun during iMC config parsing selftests/resctrl: Protect against array overflow when reading strings selftests/resctrl: Make wraparound handling obvious selftests/resctrl: Remove "once" parameter required to be false selftests/resctrl: Only support measured read operation selftests/resctrl: Remove unused measurement code selftests/resctrl: Make benchmark parameter passing robust selftests/resctrl: Ensure measurements skip initialization of default benchmark selftests/resctrl: Use cache size to determine "fill_buf" buffer size selftests/resctrl: Do not compare performance counters and resctrl at low bandwidth selftests/resctrl: Keep results from first test run selftests/resctrl: Replace magic constants used as array size tools/testing/selftests/resctrl/cmt_test.c | 37 +- tools/testing/selftests/resctrl/fill_buf.c | 45 +- tools/testing/selftests/resctrl/mba_test.c | 54 ++- tools/testing/selftests/resctrl/mbm_test.c | 37 +- tools/testing/selftests/resctrl/resctrl.h | 79 +++- .../testing/selftests/resctrl/resctrl_tests.c | 95 +++- tools/testing/selftests/resctrl/resctrl_val.c | 447 +++++------------- tools/testing/selftests/resctrl/resctrlfs.c | 19 +- 8 files changed, 354 insertions(+), 459 deletions(-) base-commit: 2a027d6bb66002c8e50e974676f932b33c5fce10 -- 2.47.0

7 months, 4 weeks

3
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[PATCH v3 0/5] Improve arm64 pkeys handling in signal delivery

by Kevin Brodsky

This series is a follow-up to Joey's Permission Overlay Extension (POE) series [1] that recently landed on mainline. The goal is to improve the way we handle the register that governs which pkeys/POIndex are accessible (POR_EL0) during signal delivery. As things stand, we may unexpectedly fail to write the signal frame on the stack because POR_EL0 is not reset before the uaccess operations. See patch 1 for more details and the main changes this series brings. A similar series landed recently for x86/MPK [2]; the present series aims at aligning arm64 with x86. Worth noting: once the signal frame is written, POR_EL0 is still set to POR_EL0_INIT, granting access to pkey 0 only. This means that a program that sets up an alternate signal stack with a non-zero pkey will need some assembly trampoline to set POR_EL0 before invoking the real signal handler, as discussed here [3]. This is not ideal, but it makes experimentation with pkeys in signal handlers possible while waiting for a potential interface to control the pkey state when delivering a signal. See Pierre's reply [4] for more information about use-cases and a potential interface. The x86 series also added kselftests to ensure that no spurious SIGSEGV occurs during signal delivery regardless of which pkey is accessible at the point where the signal is delivered. This series adapts those kselftests to allow running them on arm64 (patch 4-5). There is a dependency on Yury's PKEY_UNRESTRICTED patch [7] for patch 4 specifically. Finally patch 2 is a clean-up following feedback on Joey's series [5]. I have tested this series on arm64 and x86_64 (booting and running the protection_keys and pkey_sighandler_tests mm kselftests). - Kevin --- v2..v3: * Reordered patches (patch 1 is now the main patch). * Patch 1: compute por_enable_all with an explicit loop, based on arch_max_pkey() (suggestion from Dave M). * Patch 4: improved naming, replaced global pkey reg value with inline helper, made use of Yury's PKEY_UNRESTRICTED macro [7] (suggestions from Dave H). v2: https://lore.kernel.org/linux-arm-kernel/20241023150511.3923558-1-kevin.bro… v1..v2: * In setup_rt_frame(), ensured that POR_EL0 is reset to its original value if we fail to deliver the signal (addresses Catalin's concern [6]). * Renamed *unpriv_access* to *user_access* in patch 3 (suggestion from Dave). * Made what patch 1-2 do explicit in the commit message body (suggestion from Dave). v1: https://lore.kernel.org/linux-arm-kernel/20241017133909.3837547-1-kevin.bro… [1] https://lore.kernel.org/linux-arm-kernel/20240822151113.1479789-1-joey.goul… [2] https://lore.kernel.org/lkml/20240802061318.2140081-1-aruna.ramakrishna@ora… [3] https://lore.kernel.org/lkml/CABi2SkWxNkP2O7ipkP67WKz0-LV33e5brReevTTtba6oK… [4] https://lore.kernel.org/linux-arm-kernel/87plns8owh.fsf@arm.com/ [5] https://lore.kernel.org/linux-arm-kernel/20241015114116.GA19334@willie-the-… [6] https://lore.kernel.org/linux-arm-kernel/Zw6D2waVyIwYE7wd@arm.com/ [7] https://lore.kernel.org/all/20241028090715.509527-2-yury.khrustalev@arm.com/ Cc: akpm(a)linux-foundation.org Cc: anshuman.khandual(a)arm.com Cc: aruna.ramakrishna(a)oracle.com Cc: broonie(a)kernel.org Cc: catalin.marinas(a)arm.com Cc: dave.hansen(a)linux.intel.com Cc: Dave.Martin(a)arm.com Cc: jeffxu(a)chromium.org Cc: joey.gouly(a)arm.com Cc: keith.lucas(a)oracle.com Cc: pierre.langlois(a)arm.com Cc: shuah(a)kernel.org Cc: sroettger(a)google.com Cc: tglx(a)linutronix.de Cc: will(a)kernel.org Cc: yury.khrustalev(a)arm.com Cc: linux-kselftest(a)vger.kernel.org Cc: x86(a)kernel.org Kevin Brodsky (5): arm64: signal: Improve POR_EL0 handling to avoid uaccess failures arm64: signal: Remove unnecessary check when saving POE state arm64: signal: Remove unused macro selftests/mm: Use generic pkey register manipulation selftests/mm: Enable pkey_sighandler_tests on arm64 arch/arm64/kernel/signal.c | 95 ++++++++++++--- tools/testing/selftests/mm/Makefile | 8 +- tools/testing/selftests/mm/pkey-arm64.h | 1 + tools/testing/selftests/mm/pkey-x86.h | 2 + .../selftests/mm/pkey_sighandler_tests.c | 115 ++++++++++++++---- 5 files changed, 176 insertions(+), 45 deletions(-) -- 2.43.0

7 months, 4 weeks

5
16
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[PATCH v6 0/6] Add PSCI v1.3 SYSTEM_OFF2 support for hibernation

by David Woodhouse

The PSCI v1.3 spec (https://developer.arm.com/documentation/den0022) adds support for a SYSTEM_OFF2 function enabling a HIBERNATE_OFF state which is analogous to ACPI S4. This will allow hosting environments to determine that a guest is hibernated rather than just powered off, and ensure that they preserve the virtual environment appropriately to allow the guest to resume safely (or bump the hardware_signature in the FACS to trigger a clean reboot instead). This updates KVM to support advertising PSCI v1.3, and unconditionally enables the SYSTEM_OFF2 support when PSCI v1.3 is enabled. For the guest side, add a new SYS_OFF_MODE_POWER_OFF handler with higher priority than the EFI one, but which *only* triggers when there's a hibernation in progress. There are other ways to do this (see the commit message for more details) but this seemed like the simplest. Version 2 of the patch series splits out the psci.h definitions into a separate commit (a dependency for both the guest and KVM side), and adds definitions for the other new functions added in v1.3. It also moves the pKVM psci-relay support to a separate commit; although in arch/arm64/kvm that's actually about the *guest* side of SYSTEM_OFF2 (i.e. using it from the host kernel, relayed through nVHE). Version 3 dropped the KVM_CAP which allowed userspace to explicitly opt in to the new feature like with SYSTEM_SUSPEND, and makes it depend only on PSCI v1.3 being exposed to the guest. Version 4 is no longer RFC, as the PSCI v1.3 spec is finally published. Minor fixes from the last round of review, and an added KVM self test. Version 5 drops some of the changes which didn't make it to the final v1.3 spec, and cleans up a couple of places which still referred to it as 'alpha' or 'beta'. It also temporarily drops the guest-side patch to invoke SYSTEM_OFF2 for hibernation, pending confirmation that the final PSCI v1.3 spec just has a typo where it changed to saying that 0x1 should be passed to mean HIBERNATE_OFF, even though it's advertised as bit 0. That can be sent under separate cover, and perhaps should have been anyway. The change in question doesn't matter for any of the KVM patches, because we just treat SYSTEM_OFF2 like the existing SYSTEM_RESET2, setting a flag to indicate that it was a SYSTEM_OFF2 call, but not actually caring about the argument; that's for userspace to worry about. Version 6 is updated to revision F.b of the specification, allowing both 0x0 and 0x1 to indicate HIBERNATE_OFF in the SYSTEM_OFF2 call, as well as disallowing anything but zero in the second argument. The test is expanded to cover those variants, and to require PSCI v1.3 instead of skipping on older kernels. The final guest-side patch in the series is reinstated, using zero as the argument for compatibility with existing hypervisors in the field as permitted by revision F.b. allows for zero as well as 0x1 for HIBERNATE_OFF to accommodate the change in the final version of the spec, and expands the test to cover both forms as well as checking that a non-zero second argument is correctly rejected. David Woodhouse (6): firmware/psci: Add definitions for PSCI v1.3 specification KVM: arm64: Add PSCI v1.3 SYSTEM_OFF2 function for hibernation KVM: arm64: Add support for PSCI v1.2 and v1.3 KVM: selftests: Add test for PSCI SYSTEM_OFF2 KVM: arm64: nvhe: Pass through PSCI v1.3 SYSTEM_OFF2 call arm64: Use SYSTEM_OFF2 PSCI call to power off for hibernate Documentation/virt/kvm/api.rst | 11 +++ arch/arm64/include/uapi/asm/kvm.h | 6 ++ arch/arm64/kvm/hyp/nvhe/psci-relay.c | 2 + arch/arm64/kvm/hypercalls.c | 2 + arch/arm64/kvm/psci.c | 50 ++++++++++++- drivers/firmware/psci/psci.c | 42 +++++++++++ include/kvm/arm_psci.h | 4 +- include/uapi/linux/psci.h | 5 ++ kernel/power/hibernate.c | 5 +- tools/testing/selftests/kvm/aarch64/psci_test.c | 93 +++++++++++++++++++++++++ 10 files changed, 217 insertions(+), 3 deletions(-)

7 months, 4 weeks

6
28
0 0

[PATCH AUTOSEL 4.19 3/5] selftests/watchdog-test: Fix system accidentally reset after watchdog-test

by Sasha Levin

From: Li Zhijian <lizhijian(a)fujitsu.com> [ Upstream commit dc1308bee1ed03b4d698d77c8bd670d399dcd04d ] When running watchdog-test with 'make run_tests', the watchdog-test will be terminated by a timeout signal(SIGTERM) due to the test timemout. And then, a system reboot would happen due to watchdog not stop. see the dmesg as below: ``` [ 1367.185172] watchdog: watchdog0: watchdog did not stop! ``` Fix it by registering more signals(including SIGTERM) in watchdog-test, where its signal handler will stop the watchdog. After that # timeout 1 ./watchdog-test Watchdog Ticking Away! . Stopping watchdog ticks... Link: https://lore.kernel.org/all/20241029031324.482800-1-lizhijian@fujitsu.com/ Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/watchdog/watchdog-test.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c index f1c6e025cbe54..561bcc253fb3e 100644 --- a/tools/testing/selftests/watchdog/watchdog-test.c +++ b/tools/testing/selftests/watchdog/watchdog-test.c @@ -152,7 +152,13 @@ int main(int argc, char *argv[]) printf("Watchdog Ticking Away!\n"); + /* + * Register the signals + */ signal(SIGINT, term); + signal(SIGTERM, term); + signal(SIGKILL, term); + signal(SIGQUIT, term); while (1) { keep_alive(); -- 2.43.0

7 months, 4 weeks

1
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[PATCH AUTOSEL 5.4 3/6] selftests/watchdog-test: Fix system accidentally reset after watchdog-test

by Sasha Levin

From: Li Zhijian <lizhijian(a)fujitsu.com> [ Upstream commit dc1308bee1ed03b4d698d77c8bd670d399dcd04d ] When running watchdog-test with 'make run_tests', the watchdog-test will be terminated by a timeout signal(SIGTERM) due to the test timemout. And then, a system reboot would happen due to watchdog not stop. see the dmesg as below: ``` [ 1367.185172] watchdog: watchdog0: watchdog did not stop! ``` Fix it by registering more signals(including SIGTERM) in watchdog-test, where its signal handler will stop the watchdog. After that # timeout 1 ./watchdog-test Watchdog Ticking Away! . Stopping watchdog ticks... Link: https://lore.kernel.org/all/20241029031324.482800-1-lizhijian@fujitsu.com/ Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/watchdog/watchdog-test.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c index f45e510500c0d..09773695d219f 100644 --- a/tools/testing/selftests/watchdog/watchdog-test.c +++ b/tools/testing/selftests/watchdog/watchdog-test.c @@ -242,7 +242,13 @@ int main(int argc, char *argv[]) printf("Watchdog Ticking Away!\n"); + /* + * Register the signals + */ signal(SIGINT, term); + signal(SIGTERM, term); + signal(SIGKILL, term); + signal(SIGQUIT, term); while (1) { keep_alive(); -- 2.43.0

7 months, 4 weeks

1
0
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[PATCH AUTOSEL 5.10 3/6] selftests/watchdog-test: Fix system accidentally reset after watchdog-test

by Sasha Levin

From: Li Zhijian <lizhijian(a)fujitsu.com> [ Upstream commit dc1308bee1ed03b4d698d77c8bd670d399dcd04d ] When running watchdog-test with 'make run_tests', the watchdog-test will be terminated by a timeout signal(SIGTERM) due to the test timemout. And then, a system reboot would happen due to watchdog not stop. see the dmesg as below: ``` [ 1367.185172] watchdog: watchdog0: watchdog did not stop! ``` Fix it by registering more signals(including SIGTERM) in watchdog-test, where its signal handler will stop the watchdog. After that # timeout 1 ./watchdog-test Watchdog Ticking Away! . Stopping watchdog ticks... Link: https://lore.kernel.org/all/20241029031324.482800-1-lizhijian@fujitsu.com/ Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/watchdog/watchdog-test.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c index f45e510500c0d..09773695d219f 100644 --- a/tools/testing/selftests/watchdog/watchdog-test.c +++ b/tools/testing/selftests/watchdog/watchdog-test.c @@ -242,7 +242,13 @@ int main(int argc, char *argv[]) printf("Watchdog Ticking Away!\n"); + /* + * Register the signals + */ signal(SIGINT, term); + signal(SIGTERM, term); + signal(SIGKILL, term); + signal(SIGQUIT, term); while (1) { keep_alive(); -- 2.43.0

7 months, 4 weeks

1
0
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[PATCH AUTOSEL 5.15 07/10] selftests/watchdog-test: Fix system accidentally reset after watchdog-test

by Sasha Levin

From: Li Zhijian <lizhijian(a)fujitsu.com> [ Upstream commit dc1308bee1ed03b4d698d77c8bd670d399dcd04d ] When running watchdog-test with 'make run_tests', the watchdog-test will be terminated by a timeout signal(SIGTERM) due to the test timemout. And then, a system reboot would happen due to watchdog not stop. see the dmesg as below: ``` [ 1367.185172] watchdog: watchdog0: watchdog did not stop! ``` Fix it by registering more signals(including SIGTERM) in watchdog-test, where its signal handler will stop the watchdog. After that # timeout 1 ./watchdog-test Watchdog Ticking Away! . Stopping watchdog ticks... Link: https://lore.kernel.org/all/20241029031324.482800-1-lizhijian@fujitsu.com/ Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/watchdog/watchdog-test.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c index f45e510500c0d..09773695d219f 100644 --- a/tools/testing/selftests/watchdog/watchdog-test.c +++ b/tools/testing/selftests/watchdog/watchdog-test.c @@ -242,7 +242,13 @@ int main(int argc, char *argv[]) printf("Watchdog Ticking Away!\n"); + /* + * Register the signals + */ signal(SIGINT, term); + signal(SIGTERM, term); + signal(SIGKILL, term); + signal(SIGQUIT, term); while (1) { keep_alive(); -- 2.43.0

7 months, 4 weeks

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[PATCH AUTOSEL 6.1 07/11] selftests/watchdog-test: Fix system accidentally reset after watchdog-test

by Sasha Levin

From: Li Zhijian <lizhijian(a)fujitsu.com> [ Upstream commit dc1308bee1ed03b4d698d77c8bd670d399dcd04d ] When running watchdog-test with 'make run_tests', the watchdog-test will be terminated by a timeout signal(SIGTERM) due to the test timemout. And then, a system reboot would happen due to watchdog not stop. see the dmesg as below: ``` [ 1367.185172] watchdog: watchdog0: watchdog did not stop! ``` Fix it by registering more signals(including SIGTERM) in watchdog-test, where its signal handler will stop the watchdog. After that # timeout 1 ./watchdog-test Watchdog Ticking Away! . Stopping watchdog ticks... Link: https://lore.kernel.org/all/20241029031324.482800-1-lizhijian@fujitsu.com/ Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/watchdog/watchdog-test.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c index f45e510500c0d..09773695d219f 100644 --- a/tools/testing/selftests/watchdog/watchdog-test.c +++ b/tools/testing/selftests/watchdog/watchdog-test.c @@ -242,7 +242,13 @@ int main(int argc, char *argv[]) printf("Watchdog Ticking Away!\n"); + /* + * Register the signals + */ signal(SIGINT, term); + signal(SIGTERM, term); + signal(SIGKILL, term); + signal(SIGQUIT, term); while (1) { keep_alive(); -- 2.43.0

7 months, 4 weeks

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[PATCH AUTOSEL 6.6 10/14] selftests/watchdog-test: Fix system accidentally reset after watchdog-test

by Sasha Levin

From: Li Zhijian <lizhijian(a)fujitsu.com> [ Upstream commit dc1308bee1ed03b4d698d77c8bd670d399dcd04d ] When running watchdog-test with 'make run_tests', the watchdog-test will be terminated by a timeout signal(SIGTERM) due to the test timemout. And then, a system reboot would happen due to watchdog not stop. see the dmesg as below: ``` [ 1367.185172] watchdog: watchdog0: watchdog did not stop! ``` Fix it by registering more signals(including SIGTERM) in watchdog-test, where its signal handler will stop the watchdog. After that # timeout 1 ./watchdog-test Watchdog Ticking Away! . Stopping watchdog ticks... Link: https://lore.kernel.org/all/20241029031324.482800-1-lizhijian@fujitsu.com/ Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/watchdog/watchdog-test.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c index bc71cbca0dde7..a1f506ba55786 100644 --- a/tools/testing/selftests/watchdog/watchdog-test.c +++ b/tools/testing/selftests/watchdog/watchdog-test.c @@ -334,7 +334,13 @@ int main(int argc, char *argv[]) printf("Watchdog Ticking Away!\n"); + /* + * Register the signals + */ signal(SIGINT, term); + signal(SIGTERM, term); + signal(SIGKILL, term); + signal(SIGQUIT, term); while (1) { keep_alive(); -- 2.43.0

7 months, 4 weeks

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[PATCH AUTOSEL 6.11 15/21] selftests/watchdog-test: Fix system accidentally reset after watchdog-test

by Sasha Levin

From: Li Zhijian <lizhijian(a)fujitsu.com> [ Upstream commit dc1308bee1ed03b4d698d77c8bd670d399dcd04d ] When running watchdog-test with 'make run_tests', the watchdog-test will be terminated by a timeout signal(SIGTERM) due to the test timemout. And then, a system reboot would happen due to watchdog not stop. see the dmesg as below: ``` [ 1367.185172] watchdog: watchdog0: watchdog did not stop! ``` Fix it by registering more signals(including SIGTERM) in watchdog-test, where its signal handler will stop the watchdog. After that # timeout 1 ./watchdog-test Watchdog Ticking Away! . Stopping watchdog ticks... Link: https://lore.kernel.org/all/20241029031324.482800-1-lizhijian@fujitsu.com/ Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/watchdog/watchdog-test.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c index bc71cbca0dde7..a1f506ba55786 100644 --- a/tools/testing/selftests/watchdog/watchdog-test.c +++ b/tools/testing/selftests/watchdog/watchdog-test.c @@ -334,7 +334,13 @@ int main(int argc, char *argv[]) printf("Watchdog Ticking Away!\n"); + /* + * Register the signals + */ signal(SIGINT, term); + signal(SIGTERM, term); + signal(SIGKILL, term); + signal(SIGQUIT, term); while (1) { keep_alive(); -- 2.43.0

7 months, 4 weeks

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[PATCH v6] net: ipv4: Cache pmtu for all packet paths if multipath enabled

by Vladimir Vdovin

Check number of paths by fib_info_num_path(), and update_or_create_fnhe() for every path. Problem is that pmtu is cached only for the oif that has received icmp message "need to frag", other oifs will still try to use "default" iface mtu. An example topology showing the problem: | host1 +---------+ | dummy0 | 10.179.20.18/32 mtu9000 +---------+ +-----------+----------------+ +---------+ +---------+ | ens17f0 | 10.179.2.141/31 | ens17f1 | 10.179.2.13/31 +---------+ +---------+ | (all here have mtu 9000) | +------+ +------+ | ro1 | 10.179.2.140/31 | ro2 | 10.179.2.12/31 +------+ +------+ | | ---------+------------+-------------------+------ | +-----+ | ro3 | 10.10.10.10 mtu1500 +-----+ | ======================================== some networks ======================================== | +-----+ | eth0| 10.10.30.30 mtu9000 +-----+ | host2 host1 have enabled multipath and sysctl net.ipv4.fib_multipath_hash_policy = 1: default proto static src 10.179.20.18 nexthop via 10.179.2.12 dev ens17f1 weight 1 nexthop via 10.179.2.140 dev ens17f0 weight 1 When host1 tries to do pmtud from 10.179.20.18/32 to host2, host1 receives at ens17f1 iface an icmp packet from ro3 that ro3 mtu=1500. And host1 caches it in nexthop exceptions cache. Problem is that it is cached only for the iface that has received icmp, and there is no way that ro3 will send icmp msg to host1 via another path. Host1 now have this routes to host2: ip r g 10.10.30.30 sport 30000 dport 443 10.10.30.30 via 10.179.2.12 dev ens17f1 src 10.179.20.18 uid 0 cache expires 521sec mtu 1500 ip r g 10.10.30.30 sport 30033 dport 443 10.10.30.30 via 10.179.2.140 dev ens17f0 src 10.179.20.18 uid 0 cache So when host1 tries again to reach host2 with mtu>1500, if packet flow is lucky enough to be hashed with oif=ens17f1 its ok, if oif=ens17f0 it blackholes and still gets icmp msgs from ro3 to ens17f1, until lucky day when ro3 will send it through another flow to ens17f0. Signed-off-by: Vladimir Vdovin <deliran(a)verdict.gg> --- V6: - make commit message cleaner V5: - make self test cleaner V4: - fix selftest, do route lookup before checking cached exceptions V3: - added selftest - fixed compile error V2: - fix fib_info_num_path parameter pass --- net/ipv4/route.c | 13 +++++ tools/testing/selftests/net/pmtu.sh | 78 ++++++++++++++++++++++++++++- 2 files changed, 90 insertions(+), 1 deletion(-) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 723ac9181558..41162b5cc4cb 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1027,6 +1027,19 @@ static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu) struct fib_nh_common *nhc; fib_select_path(net, &res, fl4, NULL); +#ifdef CONFIG_IP_ROUTE_MULTIPATH + if (fib_info_num_path(res.fi) > 1) { + int nhsel; + + for (nhsel = 0; nhsel < fib_info_num_path(res.fi); nhsel++) { + nhc = fib_info_nhc(res.fi, nhsel); + update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, + jiffies + net->ipv4.ip_rt_mtu_expires); + } + rcu_read_unlock(); + return; + } +#endif /* CONFIG_IP_ROUTE_MULTIPATH */ nhc = FIB_RES_NHC(res); update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, jiffies + net->ipv4.ip_rt_mtu_expires); diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh index 569bce8b6383..a0159340fe84 100755 --- a/tools/testing/selftests/net/pmtu.sh +++ b/tools/testing/selftests/net/pmtu.sh @@ -266,7 +266,8 @@ tests=" list_flush_ipv4_exception ipv4: list and flush cached exceptions 1 list_flush_ipv6_exception ipv6: list and flush cached exceptions 1 pmtu_ipv4_route_change ipv4: PMTU exception w/route replace 1 - pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1" + pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1 + pmtu_ipv4_mp_exceptions ipv4: PMTU multipath nh exceptions 0" # Addressing and routing for tests with routers: four network segments, with # index SEGMENT between 1 and 4, a common prefix (PREFIX4 or PREFIX6) and an @@ -2329,6 +2330,81 @@ test_pmtu_ipv6_route_change() { test_pmtu_ipvX_route_change 6 } +test_pmtu_ipv4_mp_exceptions() { + setup namespaces routing || return $ksft_skip + + ip nexthop ls >/dev/null 2>&1 + if [ $? -ne 0 ]; then + echo "Nexthop objects not supported; skipping tests" + exit $ksft_skip + fi + + trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ + "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ + "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ + "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 + + dummy0_a="192.168.99.99" + dummy0_b="192.168.88.88" + + # Set up initial MTU values + mtu "${ns_a}" veth_A-R1 2000 + mtu "${ns_r1}" veth_R1-A 2000 + mtu "${ns_r1}" veth_R1-B 1500 + mtu "${ns_b}" veth_B-R1 1500 + + mtu "${ns_a}" veth_A-R2 2000 + mtu "${ns_r2}" veth_R2-A 2000 + mtu "${ns_r2}" veth_R2-B 1500 + mtu "${ns_b}" veth_B-R2 1500 + + fail=0 + + #Set up host A with multipath routes to host B dummy0_b + run_cmd ${ns_a} sysctl -q net.ipv4.fib_multipath_hash_policy=1 + run_cmd ${ns_a} sysctl -q net.ipv4.ip_forward=1 + run_cmd ${ns_a} ip link add dummy0 mtu 2000 type dummy + run_cmd ${ns_a} ip link set dummy0 up + run_cmd ${ns_a} ip addr add ${dummy0_a} dev dummy0 + run_cmd ${ns_a} ip nexthop add id 201 via ${prefix4}.${a_r1}.2 dev veth_A-R1 + run_cmd ${ns_a} ip nexthop add id 202 via ${prefix4}.${a_r2}.2 dev veth_A-R2 + run_cmd ${ns_a} ip nexthop add id 203 group 201/202 + run_cmd ${ns_a} ip route add ${dummy0_b} nhid 203 + + #Set up host B with multipath routes to host A dummy0_a + run_cmd ${ns_b} sysctl -q net.ipv4.fib_multipath_hash_policy=1 + run_cmd ${ns_b} sysctl -q net.ipv4.ip_forward=1 + run_cmd ${ns_b} ip link add dummy0 mtu 2000 type dummy + run_cmd ${ns_b} ip link set dummy0 up + run_cmd ${ns_b} ip addr add ${dummy0_b} dev dummy0 + run_cmd ${ns_b} ip nexthop add id 201 via ${prefix4}.${b_r1}.2 dev veth_A-R1 + run_cmd ${ns_b} ip nexthop add id 202 via ${prefix4}.${b_r2}.2 dev veth_A-R2 + run_cmd ${ns_b} ip nexthop add id 203 group 201/202 + run_cmd ${ns_b} ip route add ${dummy0_a} nhid 203 + + #Set up routers with routes to dummies + run_cmd ${ns_r1} ip route add ${dummy0_a} via ${prefix4}.${a_r1}.1 + run_cmd ${ns_r2} ip route add ${dummy0_a} via ${prefix4}.${a_r2}.1 + run_cmd ${ns_r1} ip route add ${dummy0_b} via ${prefix4}.${b_r1}.1 + run_cmd ${ns_r2} ip route add ${dummy0_b} via ${prefix4}.${b_r2}.1 + + + #Ping and expect two nexthop exceptions for two routes in nh group + run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dummy0_b}" + + #Do route lookup before checking cached exceptions + run_cmd ${ns_a} ip route get ${dummy0_b} oif veth_A-R1 + run_cmd ${ns_a} ip route get ${dummy0_b} oif veth_A-R2 + + #Check cached exceptions + if [ "$(${ns_a} ip -oneline route list cache| grep mtu | wc -l)" -ne 2 ]; then + err " there are not enough cached exceptions" + fail=1 + fi + + return ${fail} +} + usage() { echo echo "$0 [OPTIONS] [TEST]..." base-commit: 66600fac7a984dea4ae095411f644770b2561ede -- 2.43.5

7 months, 4 weeks

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[PATCH v4 1/2] selftests:tmpfs: Add Skip test if not run as root

by Shivam Chaudhary

- Add skip test if not run as root, with an appropriate Warning. - Add 'ksft_print_header()' and 'ksft_set_plan()' to structure test outputs more effectively. Test logs : Before change: - Without root error: unshare, errno 1 - With root No, output After change: - Without root TAP version 13 1..1 - With root TAP version 13 1..1 Signed-off-by: Shivam Chaudhary <cvam0000(a)gmail.com> --- Notes: Changes in v4 1/2: - Start a patchset - Split patch into smaller pathes to make it easy to review. link to v3: https://lore.kernel.org/all/20241028185756.111832-1-cvam0000@gmail.com/ Changes in v3: - Remove extra ksft_set_plan() - Remove function for unshare() - Fix the comment style link to v2: https://lore.kernel.org/all/20241026191621.2860376-1-cvam0000@gmail.com/ Changes in v2: - Make the commit message more clear. link to v1: https://lore.kernel.org/all/20241024200228.1075840-1-cvam0000@gmail.com/T/#u tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c b/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c index b5c3ddb90942..cdab1e8c0392 100644 --- a/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c +++ b/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c @@ -23,10 +23,23 @@ #include <sys/mount.h> #include <unistd.h> +#include "../kselftest.h" + int main(void) { int fd; + /* Setting up kselftest framework */ + ksft_print_header(); + ksft_set_plan(1); + + /* Check if test is run as root */ + if (geteuid()) { + ksft_print_msg("Skip : Need to run as root"); + exit(KSFT_SKIP); + + } + if (unshare(CLONE_NEWNS) == -1) { if (errno == ENOSYS || errno == EPERM) { fprintf(stderr, "error: unshare, errno %d\n", errno); -- 2.45.2

7 months, 4 weeks

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[PATCH v3] selftests: clone3: Use the capget and capset syscall directly

by zhouyuhang

From: zhouyuhang <zhouyuhang(a)kylinos.cn> The libcap commit aca076443591 ("Make cap_t operations thread safe.") added a __u8 mutex at the beginning of the struct _cap_struct, it changes the offset of the members in the structure that breaks the assumption made in the "struct libcap" definition in clone3_cap_checkpoint_restore.c. This will cause the test case to fail with the following output: # RUN global.clone3_cap_checkpoint_restore ... # clone3() syscall supported # clone3_cap_checkpoint_restore.c:151:clone3_cap_checkpoint_restore:Child has PID 130508 cap_set_proc: Operation not permitted # clone3_cap_checkpoint_restore.c:160:clone3_cap_checkpoint_restore:Expected set_capability() (-1) == 0 (0) # clone3_cap_checkpoint_restore.c:161:clone3_cap_checkpoint_restore:Could not set CAP_CHECKPOINT_RESTORE # clone3_cap_checkpoint_restore: Test terminated by assertion # FAIL global.clone3_cap_checkpoint_restore Changing to using capget and capset syscall directly here can fix this error, just like what the commit 663af70aabb7 ("bpf: selftests: Add helpers to directly use the capget and capset syscall") does. Signed-off-by: zhouyuhang <zhouyuhang(a)kylinos.cn> --- .../clone3/clone3_cap_checkpoint_restore.c | 58 +++++++++---------- 1 file changed, 27 insertions(+), 31 deletions(-) diff --git a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c index 3c196fa86c99..8b61702bf721 100644 --- a/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c +++ b/tools/testing/selftests/clone3/clone3_cap_checkpoint_restore.c @@ -27,6 +27,13 @@ #include "../kselftest_harness.h" #include "clone3_selftests.h" +/* + * Prevent not being defined in the header file + */ +#ifndef CAP_CHECKPOINT_RESTORE +#define CAP_CHECKPOINT_RESTORE 40 +#endif + static void child_exit(int ret) { fflush(stdout); @@ -87,47 +94,36 @@ static int test_clone3_set_tid(struct __test_metadata *_metadata, return ret; } -struct libcap { - struct __user_cap_header_struct hdr; - struct __user_cap_data_struct data[2]; -}; - static int set_capability(void) { - cap_value_t cap_values[] = { CAP_SETUID, CAP_SETGID }; - struct libcap *cap; - int ret = -1; - cap_t caps; - - caps = cap_get_proc(); - if (!caps) { - perror("cap_get_proc"); + struct __user_cap_data_struct data[2]; + struct __user_cap_header_struct hdr = { + .version = _LINUX_CAPABILITY_VERSION_3, + }; + __u32 cap0 = 1 << CAP_SETUID | 1 << CAP_SETGID; + __u32 cap1 = 1 << (CAP_CHECKPOINT_RESTORE - 32); + int ret; + + ret = capget(&hdr, data); + if (ret) { + perror("capget"); return -1; } /* Drop all capabilities */ - if (cap_clear(caps)) { - perror("cap_clear"); - goto out; - } - - cap_set_flag(caps, CAP_EFFECTIVE, 2, cap_values, CAP_SET); - cap_set_flag(caps, CAP_PERMITTED, 2, cap_values, CAP_SET); + memset(&data, 0, sizeof(data)); - cap = (struct libcap *) caps; + data[0].effective |= cap0; + data[0].permitted |= cap0; - /* 40 -> CAP_CHECKPOINT_RESTORE */ - cap->data[1].effective |= 1 << (40 - 32); - cap->data[1].permitted |= 1 << (40 - 32); + data[1].effective |= cap1; + data[1].permitted |= cap1; - if (cap_set_proc(caps)) { - perror("cap_set_proc"); - goto out; + ret = capset(&hdr, data); + if (ret) { + perror("capset"); + return -1; } - ret = 0; -out: - if (cap_free(caps)) - perror("cap_free"); return ret; } -- 2.27.0

7 months, 4 weeks

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[PATCH net-next] selftests/tc-testing: add tests for qdisc_tree_reduce_backlog

by Pedro Tammela

Add 3 tests to check for the expected behaviour of qdisc_tree_reduce_backlog in special scenarios. - The first test checks if the qdisc class is notified of deletion for major handle 'ffff:'. - The second test checks the same as the first test but with 'ffff:' as the root qdisc. - The third test checks if everything works if ingress is active. Acked-by: Jamal Hadi Salim <jhs(a)mojatatu.com> Signed-off-by: Pedro Tammela <pctammela(a)mojatatu.com> --- .../tc-testing/tc-tests/infra/qdiscs.json | 98 +++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 tools/testing/selftests/tc-testing/tc-tests/infra/qdiscs.json diff --git a/tools/testing/selftests/tc-testing/tc-tests/infra/qdiscs.json b/tools/testing/selftests/tc-testing/tc-tests/infra/qdiscs.json new file mode 100644 index 000000000000..d3dd65b05b5f --- /dev/null +++ b/tools/testing/selftests/tc-testing/tc-tests/infra/qdiscs.json @@ -0,0 +1,98 @@ +[ + { + "id": "ca5e", + "name": "Check class delete notification for ffff:", + "category": [ + "qdisc" + ], + "plugins": { + "requires": "nsPlugin" + }, + "setup": [ + "$IP link set dev $DUMMY up || true", + "$IP addr add 10.10.10.10/24 dev $DUMMY || true", + "$TC qdisc add dev $DUMMY root handle 1: drr", + "$TC filter add dev $DUMMY parent 1: basic classid 1:1", + "$TC class add dev $DUMMY parent 1: classid 1:1 drr", + "$TC qdisc add dev $DUMMY parent 1:1 handle ffff: drr", + "$TC filter add dev $DUMMY parent ffff: basic classid ffff:1", + "$TC class add dev $DUMMY parent ffff: classid ffff:1 drr", + "$TC qdisc add dev $DUMMY parent ffff:1 netem delay 1s", + "ping -c1 -W0.01 -I $DUMMY 10.10.10.1 || true", + "$TC class del dev $DUMMY classid ffff:1", + "$TC class add dev $DUMMY parent ffff: classid ffff:1 drr" + ], + "cmdUnderTest": "ping -c1 -W0.01 -I $DUMMY 10.10.10.1", + "expExitCode": "1", + "verifyCmd": "$TC -s qdisc ls dev $DUMMY", + "matchPattern": "drr 1: root", + "matchCount": "1", + "teardown": [ + "$TC qdisc del dev $DUMMY root handle 1: drr", + "$IP addr del 10.10.10.10/24 dev $DUMMY" + ] + }, + { + "id": "e4b7", + "name": "Check class delete notification for root ffff:", + "category": [ + "qdisc" + ], + "plugins": { + "requires": "nsPlugin" + }, + "setup": [ + "$IP link set dev $DUMMY up || true", + "$IP addr add 10.10.10.10/24 dev $DUMMY || true", + "$TC qdisc add dev $DUMMY root handle ffff: drr", + "$TC filter add dev $DUMMY parent ffff: basic classid ffff:1", + "$TC class add dev $DUMMY parent ffff: classid ffff:1 drr", + "$TC qdisc add dev $DUMMY parent ffff:1 netem delay 1s", + "ping -c1 -W0.01 -I $DUMMY 10.10.10.1 || true", + "$TC class del dev $DUMMY classid ffff:1", + "$TC class add dev $DUMMY parent ffff: classid ffff:1 drr" + ], + "cmdUnderTest": "ping -c1 -W0.01 -I $DUMMY 10.10.10.1", + "expExitCode": "1", + "verifyCmd": "$TC qdisc ls dev $DUMMY", + "matchPattern": "drr ffff: root", + "matchCount": "1", + "teardown": [ + "$TC qdisc del dev $DUMMY root handle ffff: drr", + "$IP addr del 10.10.10.10/24 dev $DUMMY" + ] + }, + { + "id": "33a9", + "name": "Check ingress is not searchable on backlog update", + "category": [ + "qdisc" + ], + "plugins": { + "requires": "nsPlugin" + }, + "setup": [ + "$IP link set dev $DUMMY up || true", + "$IP addr add 10.10.10.10/24 dev $DUMMY || true", + "$TC qdisc add dev $DUMMY ingress", + "$TC qdisc add dev $DUMMY root handle 1: drr", + "$TC filter add dev $DUMMY parent 1: basic classid 1:1", + "$TC class add dev $DUMMY parent 1: classid 1:1 drr", + "$TC qdisc add dev $DUMMY parent 1:1 handle 2: drr", + "$TC filter add dev $DUMMY parent 2: basic classid 2:1", + "$TC class add dev $DUMMY parent 2: classid 2:1 drr", + "$TC qdisc add dev $DUMMY parent 2:1 netem delay 1s", + "ping -c1 -W0.01 -I $DUMMY 10.10.10.1 || true" + ], + "cmdUnderTest": "$TC class del dev $DUMMY classid 2:1", + "expExitCode": "0", + "verifyCmd": "$TC qdisc ls dev $DUMMY", + "matchPattern": "drr 1: root", + "matchCount": "1", + "teardown": [ + "$TC qdisc del dev $DUMMY root handle 1: drr", + "$TC qdisc del dev $DUMMY ingress", + "$IP addr del 10.10.10.10/24 dev $DUMMY" + ] + } +] -- 2.43.0

7 months, 4 weeks

3
2
0 0

[PATCH net-next v5 0/7] Suspend IRQs during application busy periods

by Joe Damato

Greetings: Welcome to v5, see changelog below. Note that our performance tests were not re-run for this revision as we updated a commit message, fixed typos, removed a short unnecessary paragraph from the documentation and added a very minor functional change to return without suspended IRQs in certain error cases. This series introduces a new mechanism, IRQ suspension, which allows network applications using epoll to mask IRQs during periods of high traffic while also reducing tail latency (compared to existing mechanisms, see below) during periods of low traffic. In doing so, this balances CPU consumption with network processing efficiency. Martin Karsten (CC'd) and I have been collaborating on this series for several months and have appreciated the feedback from the community on our RFC [1]. We've updated the cover letter and kernel documentation in an attempt to more clearly explain how this mechanism works, how applications can use it, and how it compares to existing mechanisms in the kernel. We've added an additional test case, 'fullbusy', achieved by modifying libevent for comparison. See below for a detailed description, link to the patch, and test results. I briefly mentioned this idea at netdev conf 2024 (for those who were there) and Martin described this idea in an earlier paper presented at Sigmetrics 2024 [2]. ~ The short explanation (TL;DR) We propose adding a new napi config parameter: irq_suspend_timeout to help balance CPU usage and network processing efficiency when using IRQ deferral and napi busy poll. If this parameter is set to a non-zero value *and* a user application has enabled preferred busy poll on a busy poll context (via the EPIOCSPARAMS ioctl introduced in commit 18e2bf0edf4d ("eventpoll: Add epoll ioctl for epoll_params")), then application calls to epoll_wait for that context will cause device IRQs and softirq processing to be suspended as long as epoll_wait successfully retrieves data from the NAPI. Each time data is retrieved, the irq_suspend_timeout is deferred. If/when network traffic subsides and epoll_wait returns no data, IRQ suspension is immediately reverted back to the existing napi_defer_hard_irqs and gro_flush_timeout mechanism which was introduced in commit 6f8b12d661d0 ("net: napi: add hard irqs deferral feature")). The irq_suspend_timeout serves as a safety mechanism. If userland takes a long time processing data, irq_suspend_timeout will fire and restart normal NAPI processing. For a more in depth explanation, please continue reading. ~ Comparison with existing mechanisms Interrupt mitigation can be accomplished in napi software, by setting napi_defer_hard_irqs and gro_flush_timeout, or via interrupt coalescing in the NIC. This can be quite efficient, but in both cases, a fixed timeout (or packet count) needs to be configured. However, a fixed timeout cannot effectively support both low- and high-load situations: At low load, an application typically processes a few requests and then waits to receive more input data. In this scenario, a large timeout will cause unnecessary latency. At high load, an application typically processes many requests before being ready to receive more input data. In this case, a small timeout will likely fire prematurely and trigger irq/softirq processing, which interferes with the application's execution. This causes overhead, most likely due to cache contention. While NICs attempt to provide adaptive interrupt coalescing schemes, these cannot properly take into account application-level processing. An alternative packet delivery mechanism is busy-polling, which results in perfect alignment of application processing and network polling. It delivers optimal performance (throughput and latency), but results in 100% cpu utilization and is thus inefficient for below-capacity workloads. We propose to add a new packet delivery mode that properly alternates between busy polling and interrupt-based delivery depending on busy and idle periods of the application. During a busy period, the system operates in busy-polling mode, which avoids interference. During an idle period, the system falls back to interrupt deferral, but with a small timeout to avoid excessive latencies. This delivery mode can also be viewed as an extension of basic interrupt deferral, but alternating between a small and a very large timeout. This delivery mode is efficient, because it avoids softirq execution interfering with application processing during busy periods. It can be used with blocking epoll_wait to conserve cpu cycles during idle periods. The effect of alternating between busy and idle periods is that performance (throughput and latency) is very close to full busy polling, while cpu utilization is lower and very close to interrupt mitigation. ~ Usage details IRQ suspension is introduced via a per-NAPI configuration parameter that controls the maximum time that IRQs can be suspended. Here's how it is intended to work: - The user application (or system administrator) uses the netdev-genl netlink interface to set the pre-existing napi_defer_hard_irqs and gro_flush_timeout NAPI config parameters to enable IRQ deferral. - The user application (or system administrator) sets the proposed irq_suspend_timeout parameter via the netdev-genl netlink interface to a larger value than gro_flush_timeout to enable IRQ suspension. - The user application issues the existing epoll ioctl to set the prefer_busy_poll flag on the epoll context. - The user application then calls epoll_wait to busy poll for network events, as it normally would. - If epoll_wait returns events to userland, IRQs are suspended for the duration of irq_suspend_timeout. - If epoll_wait finds no events and the thread is about to go to sleep, IRQ handling using napi_defer_hard_irqs and gro_flush_timeout is resumed. As long as epoll_wait is retrieving events, IRQs (and softirq processing) for the NAPI being polled remain disabled. When network traffic reduces, eventually a busy poll loop in the kernel will retrieve no data. When this occurs, regular IRQ deferral using gro_flush_timeout for the polled NAPI is re-enabled. Unless IRQ suspension is continued by subsequent calls to epoll_wait, it automatically times out after the irq_suspend_timeout timer expires. Regular deferral is also immediately re-enabled when the epoll context is destroyed. ~ Usage scenario The target scenario for IRQ suspension as packet delivery mode is a system that runs a dominant application with substantial network I/O. The target application can be configured to receive input data up to a certain batch size (via epoll_wait maxevents parameter) and this batch size determines the worst-case latency that application requests might experience. Because packet delivery is suspended during the target application's processing, the batch size also determines the worst-case latency of concurrent applications using the same RX queue(s). gro_flush_timeout should be set as small as possible, but large enough to make sure that a single request is likely not being interfered with. irq_suspend_timeout is largely a safety mechanism against misbehaving applications. It should be set large enough to cover the processing of an entire application batch, i.e., the factor between gro_flush_timeout and irq_suspend_timeout should roughly correspond to the maximum batch size that the target application would process in one go. ~ Design rationale The implementation of the IRQ suspension mechanism very nicely dovetails with the existing mechanism for IRQ deferral when preferred busy poll is enabled (introduced in commit 7fd3253a7de6 ("net: Introduce preferred busy-polling"), see that commit message for more details). While it would be possible to inject the suspend timeout via the existing epoll ioctl, it is more natural to avoid this path for one main reason: An epoll context is linked to NAPI IDs as file descriptors are added; this means any epoll context might suddenly be associated with a different net_device if the application were to replace all existing fds with fds from a different device. In this case, the scope of the suspend timeout becomes unclear and many edge cases for both the user application and the kernel are introduced Only a single iteration through napi busy polling is needed for this mechanism to work effectively. Since an important objective for this mechanism is preserving cpu cycles, exactly one iteration of the napi busy loop is invoked when busy_poll_usecs is set to 0. ~ Important call out in the implementation - Enabling per epoll-context preferred busy poll will now effectively lead to a nonblocking iteration through napi_busy_loop, even when busy_poll_usecs is 0. See patch 4. ~ Benchmark configs & descriptions The changes were benchmarked with memcached [3] using the benchmarking tool mutilate [4]. To facilitate benchmarking, a small patch [5] was applied to memcached 1.6.29 to allow setting per-epoll context preferred busy poll and other settings via environment variables. Another small patch [6] was applied to libevent to enable full busy-polling. Multiple scenarios were benchmarked as described below and the scripts used for producing these results can be found on github [7] (note: all scenarios use NAPI-based traffic splitting via SO_INCOMING_ID by passing -N to memcached): - base: - no other options enabled - deferX: - set defer_hard_irqs to 100 - set gro_flush_timeout to X,000 - napibusy: - set defer_hard_irqs to 100 - set gro_flush_timeout to 200,000 - enable busy poll via the existing ioctl (busy_poll_usecs = 64, busy_poll_budget = 64, prefer_busy_poll = true) - fullbusy: - set defer_hard_irqs to 100 - set gro_flush_timeout to 5,000,000 - enable busy poll via the existing ioctl (busy_poll_usecs = 1000, busy_poll_budget = 64, prefer_busy_poll = true) - change memcached's nonblocking epoll_wait invocation (via libevent) to using a 1 ms timeout - suspendX: - set defer_hard_irqs to 100 - set gro_flush_timeout to X,000 - set irq_suspend_timeout to 20,000,000 - enable busy poll via the existing ioctl (busy_poll_usecs = 0, busy_poll_budget = 64, prefer_busy_poll = true) ~ Benchmark results Tested on: Single socket AMD EPYC 7662 64-Core Processor Hyperthreading disabled 4 NUMA Zones (NPS=4) 16 CPUs per NUMA zone (64 cores total) 2 x Dual port 100gbps Mellanox Technologies ConnectX-5 Ex EN NIC The test machine is configured such that a single interface has 8 RX queues. The queues' IRQs and memcached are pinned to CPUs that are NUMA-local to the interface which is under test. The NIC's interrupt coalescing configuration is left at boot-time defaults. Results: Results are shown below. The mechanism added by this series is represented by the 'suspend' cases. Data presented shows a summary over at least 10 runs of each test case [8] using the scripts on github [7]. For latency, the median is shown. For throughput and CPU utilization, the average is shown. The results also include cycles-per-query (cpq) and instruction-per-query (ipq) metrics, following the methodology proposed in [2], to augment the CPU utilization numbers, which could be skewed due to frequency scaling. We find that this does not appear to be the case as CPU utilization and low-level metrics show similar trends. These results were captured using the scripts on github [7] to illustrate how this approach compares with other pre-existing mechanisms. This data is not to be interpreted as scientific data captured in a fully isolated lab setting, but instead as best effort, illustrative information comparing and contrasting tradeoffs. The absolute QPS results are higher than our previous submission, but the relative differences between variants are equivalent. Because the patches have been rebased on 6.12, several factors have likely influenced the overall performance. Most importantly, we had to switch to a new set of basic kernel options, which has likely altered the baseline performance. Because the overall comparison of variants still holds, we have not attempted to recreate the exact set of kernel options from the previous submission. Compare: - Throughput (MAX) and latencies of base vs suspend. - CPU usage of napibusy and fullbusy during lower load (200K, 400K for example) vs suspend. - Latency of the defer variants vs suspend as timeout and load increases. The overall takeaway is that the suspend variants provide a superior combination of high throughput, low latency, and low cpu utilization compared to all other variants. Each of the suspend variants works very well, but some fine-tuning between latency and cpu utilization is still possible by tuning the small timeout (gro_flush_timeout). Note: we've reorganized the results to make comparison among testcases with the same load easier. testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 200K 200024 127 254 458 25 12748 11289 defer10 200K 199991 64 128 166 27 18763 16574 defer20 200K 199986 72 135 178 25 15405 14173 defer50 200K 200025 91 149 198 23 12275 12203 defer200 200K 199996 182 266 326 18 8595 9183 fullbusy 200K 200040 58 123 167 100 43641 23145 napibusy 200K 200009 115 244 299 56 24797 24693 suspend10 200K 200005 63 128 167 32 19559 17240 suspend20 200K 199952 69 132 170 29 16324 14838 suspend50 200K 200019 84 144 189 26 13106 12516 suspend200 200K 199978 168 264 326 20 9331 9643 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 400K 400017 157 292 762 39 9287 9325 defer10 400K 400033 71 141 204 53 13950 12943 defer20 400K 399935 79 150 212 47 12027 11673 defer50 400K 399888 101 171 231 39 9556 9921 defer200 400K 399993 200 287 358 32 7428 8576 fullbusy 400K 400018 63 132 203 100 21827 16062 napibusy 400K 399970 89 230 292 83 18156 16508 suspend10 400K 400061 69 139 202 54 13576 13057 suspend20 400K 399988 73 144 206 49 11930 11773 suspend50 400K 399975 88 161 218 42 9996 10270 suspend200 400K 399954 172 276 353 34 7847 8713 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 600K 600031 166 289 631 61 9188 8787 defer10 600K 599967 85 167 262 75 11833 10947 defer20 600K 599888 89 165 243 66 10513 10362 defer50 600K 600072 109 185 253 55 8664 9190 defer200 600K 599951 222 315 393 45 6892 8213 fullbusy 600K 600041 69 145 227 100 14549 13936 napibusy 600K 599980 79 188 280 96 13927 14155 suspend10 600K 600028 78 159 267 69 10877 11032 suspend20 600K 600026 81 159 254 64 9922 10320 suspend50 600K 600007 96 178 258 57 8681 9331 suspend200 600K 599964 177 295 369 47 7115 8366 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 800K 800034 198 329 698 84 9366 8338 defer10 800K 799718 243 642 1457 95 10532 9007 defer20 800K 800009 132 245 399 89 9956 8979 defer50 800K 800024 136 228 378 80 9002 8598 defer200 800K 799965 255 362 473 66 7481 8147 fullbusy 800K 799927 78 157 253 100 10915 12533 napibusy 800K 799870 81 173 273 99 10826 12532 suspend10 800K 799991 84 167 269 83 9380 9802 suspend20 800K 799979 90 172 290 78 8765 9404 suspend50 800K 800031 106 191 307 71 7945 8805 suspend200 800K 799905 182 307 411 62 6985 8242 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 1000K 919543 3805 6390 14229 98 9324 7978 defer10 1000K 850751 4574 7382 15370 99 10218 8470 defer20 1000K 890296 4736 6862 14858 99 9708 8277 defer50 1000K 932694 3463 6180 13251 97 9148 8053 defer200 1000K 951311 3524 6052 13599 96 8875 7845 fullbusy 1000K 1000011 90 181 278 100 8731 10686 napibusy 1000K 1000050 93 184 280 100 8721 10547 suspend10 1000K 999962 101 193 306 92 8138 8980 suspend20 1000K 1000030 103 191 324 88 7844 8763 suspend50 1000K 1000001 114 202 320 83 7396 8431 suspend200 1000K 999965 185 314 428 76 6733 8072 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base MAX 1005592 4651 6594 14979 100 8679 7918 defer10 MAX 928204 5106 7286 15199 100 9398 8380 defer20 MAX 984663 4774 6518 14920 100 8861 8063 defer50 MAX 1044099 4431 6368 14652 100 8350 7948 defer200 MAX 1040451 4423 6610 14674 100 8380 7931 fullbusy MAX 1236608 3715 3987 12805 100 7051 7936 napibusy MAX 1077516 4345 10155 15957 100 8080 7842 suspend10 MAX 1218344 3760 3990 12585 100 7150 7935 suspend20 MAX 1220056 3752 4053 12602 100 7150 7961 suspend50 MAX 1213666 3791 4103 12919 100 7183 7959 suspend200 MAX 1217411 3768 3988 12863 100 7161 7954 ~ FAQ - Why is a new parameter needed? Does irq_suspend_timeout override gro_flush_timeout? Using the suspend mechanism causes the system to alternate between polling mode and irq-driven packet delivery. During busy periods, irq_suspend_timeout overrides gro_flush_timeout and keeps the system busy polling, but when epoll finds no events, the setting of gro_flush_timeout and napi_defer_hard_irqs determine the next step. There are essentially three possible loops for network processing and packet delivery: 1) hardirq -> softirq -> napi poll; basic interrupt delivery 2) timer -> softirq -> napi poll; deferred irq processing 3) epoll -> busy-poll -> napi poll; busy looping Loop 2) can take control from Loop 1), if gro_flush_timeout and napi_defer_hard_irqs are set. If gro_flush_timeout and napi_defer_hard_irqs are set, Loops 2) and 3) "wrestle" with each other for control. During busy periods, irq_suspend_timeout is used as timer in Loop 2), which essentially tilts this in favour of Loop 3). If gro_flush_timeout and napi_defer_hard_irqs are not set, Loop 3) cannot take control from Loop 1). Therefore, setting gro_flush_timeout and napi_defer_hard_irqs is the recommended usage, because otherwise setting irq_suspend_timeout might not have any discernible effect. We ran experiments with these parameters set to zero and the results are as expected and essentially the same as the base case. - Can the new timeout value be threaded through the new epoll ioctl ? Only with difficulty. The epoll ioctl sets options on an epoll context and the NAPI ID associated with an epoll context can change based on what file descriptors a user app adds to the epoll context. This would introduce complexity in the API from the user perspective and also complexity in the kernel. - Can irq suspend be built by combining NIC coalescing and gro_flush_timeout ? No. The problem is that the long timeout must engage if and only if prefer-busy is active. When using NIC coalescing for the short timeout (without napi_defer_hard_irqs/gro_flush_timeout), an interrupt after an idle period will trigger softirq, which will run napi polling. At this point, prefer-busy is not active, so NIC interrupts would be re-enabled. Then it is not possible for the longer timeout to interject to switch control back to polling. In other words, only by using the software timer for the short timeout, it is possible to extend the timeout without having to reprogram the NIC timer or reach down directly and disable interrupts. Using gro_flush_timeout for the long timeout also has problems, for the same underlying reason. In the current napi implementation, gro_flush_timeout is not tied to prefer-busy. We'd either have to change that and in the process modify the existing deferral mechanism, or introduce a state variable to determine whether gro_flush_timeout is used as long timeout for irq suspend or whether it is used for its default purpose. In an earlier version, we did try something similar to the latter and made it work, but it ends up being a lot more convoluted than our current proposal. - Isn't it already possible to combine busy looping with irq deferral? Yes, in fact enabling irq deferral via napi_defer_hard_irqs and gro_flush_timeout is a precondition for prefer_busy_poll to have an effect. If the application also uses a tight busy loop with essentially nonblocking epoll_wait (accomplished with a very short timeout parameter), this is the fullbusy case shown in the results. An application using blocking epoll_wait is shown as the napibusy case in the results. It's a hybrid approach that provides limited latency benefits compared to the base case and plain irq deferral, but not as good as fullbusy or suspend. ~ Special thanks Several people were involved in earlier stages of the development of this mechanism whom we'd like to thank: - Peter Cai (CC'd), for the initial kernel patch and his contributions to the paper. - Mohammadamin Shafie (CC'd), for testing various versions of the kernel patch and providing helpful feedback. Thanks, Martin and Joe [1]: https://lore.kernel.org/netdev/20240812125717.413108-1-jdamato@fastly.com/ [2]: https://doi.org/10.1145/3626780 [3]: https://github.com/memcached/memcached/blob/master/doc/napi_ids.txt [4]: https://github.com/leverich/mutilate [5]: https://raw.githubusercontent.com/martinkarsten/irqsuspend/main/patches/mem… [6]: https://raw.githubusercontent.com/martinkarsten/irqsuspend/main/patches/lib… [7]: https://github.com/martinkarsten/irqsuspend [8]: https://github.com/martinkarsten/irqsuspend/tree/main/results v5: - Adjusted patch 5 to only suspend IRQs when ep_send_events returns a positive return value. This issue was pointed out by Hillf Danton. - Updated the commit message of patch 6 which still mentioned netcat, despite the code being updated in v4 to replace it with socat and fixed misspelling of netdevsim. - Fixed a minor typo in patch 7 and removed an unnecessary paragraph. - Added Sridhar Samudrala's Reviewed-by to patch 1-5 and 7. v4: https://lore.kernel.org/netdev/20241102005214.32443-1-jdamato@fastly.com/ - Added a new FAQ item to cover letter. - Updated patch 6 to use socat instead of nc in busy_poll_test.sh and updated busy_poller.c to use netlink directly to configure napi params. - Updated the kernel documentation in patch 7 to include more details. - Dropped Stanislav's Acked-by and Bagas' Reviewed-by from patch 7 since the documentation was updated. v3: https://lore.kernel.org/netdev/20241101004846.32532-1-jdamato@fastly.com/ - Added Stanislav Fomichev's Acked-by to every patch except the newly added selftest. - Added Bagas Sanjaya's Reviewed-by to the documentation patch. - Fixed the commit message of patch 2 to remove a reference to the now non-existent sysfs setting. - Added a self test which tests both "regular" busy poll and busy poll with suspend enabled. This was added as patch 6 as requested by Paolo. netdevsim was chosen instead of veth due to netdevsim's pre-existing support for netdev-genl. See the commit message of patch 6 for more details. v2: https://lore.kernel.org/bpf/20241021015311.95468-1-jdamato@fastly.com/ - Cover letter updated, including a re-run of test data. - Patch 1 rewritten to use netdev-genl instead of sysfs. - Patch 3 updated with a comment added to napi_resume_irqs. - Patch 4 rebased to apply now that commit b9ca079dd6b0 ("eventpoll: Annotate data-race of busy_poll_usecs") has been picked up from VFS. - Patch 6 updated the kernel documentation. rfc -> v1: - Cover letter updated to include more details. - Patch 1 updated to remove the documentation added. This was moved to patch 6 with the rest of the docs (see below). - Patch 5 updated to fix an error uncovered by the kernel build robot. See patch 5's changelog for more details. - Patch 6 added which updates kernel documentation. Joe Damato (2): selftests: net: Add busy_poll_test docs: networking: Describe irq suspension Martin Karsten (5): net: Add napi_struct parameter irq_suspend_timeout net: Suspend softirq when prefer_busy_poll is set net: Add control functions for irq suspension eventpoll: Trigger napi_busy_loop, if prefer_busy_poll is set eventpoll: Control irq suspension for prefer_busy_poll Documentation/netlink/specs/netdev.yaml | 7 + Documentation/networking/napi.rst | 172 ++++++++- fs/eventpoll.c | 36 +- include/linux/netdevice.h | 2 + include/net/busy_poll.h | 3 + include/uapi/linux/netdev.h | 1 + net/core/dev.c | 58 +++- net/core/dev.h | 25 ++ net/core/netdev-genl-gen.c | 5 +- net/core/netdev-genl.c | 12 + tools/include/uapi/linux/netdev.h | 1 + tools/testing/selftests/net/.gitignore | 1 + tools/testing/selftests/net/Makefile | 3 +- tools/testing/selftests/net/busy_poll_test.sh | 164 +++++++++ tools/testing/selftests/net/busy_poller.c | 328 ++++++++++++++++++ 15 files changed, 807 insertions(+), 11 deletions(-) create mode 100755 tools/testing/selftests/net/busy_poll_test.sh create mode 100644 tools/testing/selftests/net/busy_poller.c base-commit: dbb9a7ef347828870df3e5e6ddf19469a3277fc9 -- 2.25.1

8 months

1
1
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[PATCH v1 1/2] selftests/x86/syscall: fix coccinelle WARNING recommending the use of ARRAY_SIZE()

by Mirsad Todorovac

Coccinelle gives WARNING recommending the use of ARRAY_SIZE() macro definition to improve the code readability: ./tools/testing/selftests/x86/syscall_numbering.c:316:35-36: WARNING: Use ARRAY_SIZE Fixes: 15c82d98a0f78 ("selftests/x86/syscall: Update and extend syscall_numbering_64") Cc: Thomas Gleixner <tglx(a)linutronix.de> Cc: Ingo Molnar <mingo(a)redhat.com> Cc: Borislav Petkov <bp(a)alien8.de> Cc: Dave Hansen <dave.hansen(a)linux.intel.com> Cc: x86(a)kernel.org Cc: "H. Peter Anvin" <hpa(a)zytor.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: linux-kernel(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org Signed-off-by: Mirsad Todorovac <mtodorovac69(a)gmail.com> --- v1: initial version. tools/testing/selftests/x86/syscall_numbering.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/x86/syscall_numbering.c b/tools/testing/selftests/x86/syscall_numbering.c index 991591718bb0..41c42b7b54a6 100644 --- a/tools/testing/selftests/x86/syscall_numbering.c +++ b/tools/testing/selftests/x86/syscall_numbering.c @@ -25,6 +25,7 @@ #include <sys/mman.h> #include <linux/ptrace.h> +#include "../kselftest.h" /* Common system call numbers */ #define SYS_READ 0 @@ -313,7 +314,7 @@ static void test_syscall_numbering(void) * The MSB is supposed to be ignored, so we loop over a few * to test that out. */ - for (size_t i = 0; i < sizeof(msbs)/sizeof(msbs[0]); i++) { + for (size_t i = 0; i < ARRAY_SIZE(msbs); i++) { int msb = msbs[i]; run("Checking system calls with msb = %d (0x%x)\n", msb, msb); -- 2.43.0

8 months

3
5
0 0

[PATCH v5] net: ipv4: Cache pmtu for all packet paths if multipath enabled

by Vladimir Vdovin

Check number of paths by fib_info_num_path(), and update_or_create_fnhe() for every path. Problem is that pmtu is cached only for the oif that has received icmp message "need to frag", other oifs will still try to use "default" iface mtu. V5: - make self test cleaner V4: - fix selftest, do route lookup before checking cached exceptions V3: - added selftest - fixed compile error V2: - fix fib_info_num_path parameter pass An example topology showing the problem: | host1 +---------+ | dummy0 | 10.179.20.18/32 mtu9000 +---------+ +-----------+----------------+ +---------+ +---------+ | ens17f0 | 10.179.2.141/31 | ens17f1 | 10.179.2.13/31 +---------+ +---------+ | (all here have mtu 9000) | +------+ +------+ | ro1 | 10.179.2.140/31 | ro2 | 10.179.2.12/31 +------+ +------+ | | ---------+------------+-------------------+------ | +-----+ | ro3 | 10.10.10.10 mtu1500 +-----+ | ======================================== some networks ======================================== | +-----+ | eth0| 10.10.30.30 mtu9000 +-----+ | host2 host1 have enabled multipath and sysctl net.ipv4.fib_multipath_hash_policy = 1: default proto static src 10.179.20.18 nexthop via 10.179.2.12 dev ens17f1 weight 1 nexthop via 10.179.2.140 dev ens17f0 weight 1 When host1 tries to do pmtud from 10.179.20.18/32 to host2, host1 receives at ens17f1 iface an icmp packet from ro3 that ro3 mtu=1500. And host1 caches it in nexthop exceptions cache. Problem is that it is cached only for the iface that has received icmp, and there is no way that ro3 will send icmp msg to host1 via another path. Host1 now have this routes to host2: ip r g 10.10.30.30 sport 30000 dport 443 10.10.30.30 via 10.179.2.12 dev ens17f1 src 10.179.20.18 uid 0 cache expires 521sec mtu 1500 ip r g 10.10.30.30 sport 30033 dport 443 10.10.30.30 via 10.179.2.140 dev ens17f0 src 10.179.20.18 uid 0 cache So when host1 tries again to reach host2 with mtu>1500, if packet flow is lucky enough to be hashed with oif=ens17f1 its ok, if oif=ens17f0 it blackholes and still gets icmp msgs from ro3 to ens17f1, until lucky day when ro3 will send it through another flow to ens17f0. Signed-off-by: Vladimir Vdovin <deliran(a)verdict.gg> --- net/ipv4/route.c | 13 +++++ tools/testing/selftests/net/pmtu.sh | 78 ++++++++++++++++++++++++++++- 2 files changed, 90 insertions(+), 1 deletion(-) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 723ac9181558..41162b5cc4cb 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1027,6 +1027,19 @@ static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu) struct fib_nh_common *nhc; fib_select_path(net, &res, fl4, NULL); +#ifdef CONFIG_IP_ROUTE_MULTIPATH + if (fib_info_num_path(res.fi) > 1) { + int nhsel; + + for (nhsel = 0; nhsel < fib_info_num_path(res.fi); nhsel++) { + nhc = fib_info_nhc(res.fi, nhsel); + update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, + jiffies + net->ipv4.ip_rt_mtu_expires); + } + rcu_read_unlock(); + return; + } +#endif /* CONFIG_IP_ROUTE_MULTIPATH */ nhc = FIB_RES_NHC(res); update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, jiffies + net->ipv4.ip_rt_mtu_expires); diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh index 569bce8b6383..a0159340fe84 100755 --- a/tools/testing/selftests/net/pmtu.sh +++ b/tools/testing/selftests/net/pmtu.sh @@ -266,7 +266,8 @@ tests=" list_flush_ipv4_exception ipv4: list and flush cached exceptions 1 list_flush_ipv6_exception ipv6: list and flush cached exceptions 1 pmtu_ipv4_route_change ipv4: PMTU exception w/route replace 1 - pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1" + pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1 + pmtu_ipv4_mp_exceptions ipv4: PMTU multipath nh exceptions 0" # Addressing and routing for tests with routers: four network segments, with # index SEGMENT between 1 and 4, a common prefix (PREFIX4 or PREFIX6) and an @@ -2329,6 +2330,81 @@ test_pmtu_ipv6_route_change() { test_pmtu_ipvX_route_change 6 } +test_pmtu_ipv4_mp_exceptions() { + setup namespaces routing || return $ksft_skip + + ip nexthop ls >/dev/null 2>&1 + if [ $? -ne 0 ]; then + echo "Nexthop objects not supported; skipping tests" + exit $ksft_skip + fi + + trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ + "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ + "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ + "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 + + dummy0_a="192.168.99.99" + dummy0_b="192.168.88.88" + + # Set up initial MTU values + mtu "${ns_a}" veth_A-R1 2000 + mtu "${ns_r1}" veth_R1-A 2000 + mtu "${ns_r1}" veth_R1-B 1500 + mtu "${ns_b}" veth_B-R1 1500 + + mtu "${ns_a}" veth_A-R2 2000 + mtu "${ns_r2}" veth_R2-A 2000 + mtu "${ns_r2}" veth_R2-B 1500 + mtu "${ns_b}" veth_B-R2 1500 + + fail=0 + + #Set up host A with multipath routes to host B dummy0_b + run_cmd ${ns_a} sysctl -q net.ipv4.fib_multipath_hash_policy=1 + run_cmd ${ns_a} sysctl -q net.ipv4.ip_forward=1 + run_cmd ${ns_a} ip link add dummy0 mtu 2000 type dummy + run_cmd ${ns_a} ip link set dummy0 up + run_cmd ${ns_a} ip addr add ${dummy0_a} dev dummy0 + run_cmd ${ns_a} ip nexthop add id 201 via ${prefix4}.${a_r1}.2 dev veth_A-R1 + run_cmd ${ns_a} ip nexthop add id 202 via ${prefix4}.${a_r2}.2 dev veth_A-R2 + run_cmd ${ns_a} ip nexthop add id 203 group 201/202 + run_cmd ${ns_a} ip route add ${dummy0_b} nhid 203 + + #Set up host B with multipath routes to host A dummy0_a + run_cmd ${ns_b} sysctl -q net.ipv4.fib_multipath_hash_policy=1 + run_cmd ${ns_b} sysctl -q net.ipv4.ip_forward=1 + run_cmd ${ns_b} ip link add dummy0 mtu 2000 type dummy + run_cmd ${ns_b} ip link set dummy0 up + run_cmd ${ns_b} ip addr add ${dummy0_b} dev dummy0 + run_cmd ${ns_b} ip nexthop add id 201 via ${prefix4}.${b_r1}.2 dev veth_A-R1 + run_cmd ${ns_b} ip nexthop add id 202 via ${prefix4}.${b_r2}.2 dev veth_A-R2 + run_cmd ${ns_b} ip nexthop add id 203 group 201/202 + run_cmd ${ns_b} ip route add ${dummy0_a} nhid 203 + + #Set up routers with routes to dummies + run_cmd ${ns_r1} ip route add ${dummy0_a} via ${prefix4}.${a_r1}.1 + run_cmd ${ns_r2} ip route add ${dummy0_a} via ${prefix4}.${a_r2}.1 + run_cmd ${ns_r1} ip route add ${dummy0_b} via ${prefix4}.${b_r1}.1 + run_cmd ${ns_r2} ip route add ${dummy0_b} via ${prefix4}.${b_r2}.1 + + + #Ping and expect two nexthop exceptions for two routes in nh group + run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dummy0_b}" + + #Do route lookup before checking cached exceptions + run_cmd ${ns_a} ip route get ${dummy0_b} oif veth_A-R1 + run_cmd ${ns_a} ip route get ${dummy0_b} oif veth_A-R2 + + #Check cached exceptions + if [ "$(${ns_a} ip -oneline route list cache| grep mtu | wc -l)" -ne 2 ]; then + err " there are not enough cached exceptions" + fail=1 + fi + + return ${fail} +} + usage() { echo echo "$0 [OPTIONS] [TEST]..." base-commit: 66600fac7a984dea4ae095411f644770b2561ede -- 2.43.5

8 months

3
4
0 0

[PATCH 0/2] kunit: enable hardware virtualization

by Tamir Duberstein

This series implements feature detection of hardware virtualization on Linux and macOS; the latter being my primary use case. This yields approximately a 6x improvement using HVF on M3 Pro. Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- Tamir Duberstein (2): kunit: add fallback for os.sched_getaffinity kunit: enable hardware acceleration when available tools/testing/kunit/kunit.py | 11 ++++++++++- tools/testing/kunit/kunit_kernel.py | 26 +++++++++++++++++++++++++- tools/testing/kunit/qemu_configs/arm64.py | 2 +- 3 files changed, 36 insertions(+), 3 deletions(-) --- base-commit: ae90f6a6170d7a7a1aa4fddf664fbd093e3023bc change-id: 20241025-kunit-qemu-accel-macos-2840e4c2def5 Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

8 months

3
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0 0

[GIT PULL] Kselftest fixes update for Linux 6.12-rc6

by Shuah Khan

Hi Linus, Please pull the following kselftest fixes update for Linux 6.12-rc6. Kselftest fixes for Linux 6.12-rc6 - fix syntax error in frequency calculation arithmetic expression in intel_pstate run.sh - add missing cpupower dependency check intel_pstate run.sh - fix idmap_mount_tree_invalid test failure due to incorrect argument - fix watchdog-test run leaving the watchdog timer enabled causing system reboot. With this fix, the test disables the watchdog timer when it gets terminated with SIGTERM, SIGKILL, and SIGQUIT in addition to SIGINT diff is attached. thanks, -- Shuah ---------------------------------------------------------------- The following changes since commit fe05c40ca9c18cfdb003f639a30fc78a7ab49519: selftest: hid: add the missing tests directory (2024-10-16 15:55:14 -0600) are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux_kselftest-fixes-6.12-rc6 for you to fetch changes up to dc1308bee1ed03b4d698d77c8bd670d399dcd04d: selftests/watchdog-test: Fix system accidentally reset after watchdog-test (2024-10-28 21:34:43 -0600) ---------------------------------------------------------------- linux_kselftest-fixes-6.12-rc6 Kselftest fixes for Linux 6.12-rc6 - fix syntax error in frequency calculation arithmetic expression in intel_pstate run.sh - add missing cpupower dependency check intel_pstate run.sh - fix idmap_mount_tree_invalid test failure due to incorrect argument - fix watchdog-test run leaving the watchdog timer enabled causing system reboot. With this fix, the test disables the watchdog timer when it gets terminated with SIGTERM, SIGKILL, and SIGQUIT in addition to SIGINT ---------------------------------------------------------------- Alessandro Zanni (2): selftests/intel_pstate: fix operand expected error selftests/intel_pstate: check if cpupower is installed Li Zhijian (1): selftests/watchdog-test: Fix system accidentally reset after watchdog-test zhouyuhang (1): selftests/mount_setattr: fix idmap_mount_tree_invalid failed to run tools/testing/selftests/intel_pstate/run.sh | 9 +++++++-- tools/testing/selftests/mount_setattr/mount_setattr_test.c | 9 +++++++++ tools/testing/selftests/watchdog/watchdog-test.c | 6 ++++++ 3 files changed, 22 insertions(+), 2 deletions(-) ---------------------------------------------------------------

8 months

2
1
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[PATCH net-next v4 0/7] Suspend IRQs during application busy periods

by Joe Damato

Greetings: Welcome to v4, see changelog below. Note that our performance tests were not re-run for this revision as we updated the selftest, FAQ in the cover letter, and kernel documentation. No functional/code changes. This series introduces a new mechanism, IRQ suspension, which allows network applications using epoll to mask IRQs during periods of high traffic while also reducing tail latency (compared to existing mechanisms, see below) during periods of low traffic. In doing so, this balances CPU consumption with network processing efficiency. Martin Karsten (CC'd) and I have been collaborating on this series for several months and have appreciated the feedback from the community on our RFC [1]. We've updated the cover letter and kernel documentation in an attempt to more clearly explain how this mechanism works, how applications can use it, and how it compares to existing mechanisms in the kernel. We've added an additional test case, 'fullbusy', achieved by modifying libevent for comparison. See below for a detailed description, link to the patch, and test results. I briefly mentioned this idea at netdev conf 2024 (for those who were there) and Martin described this idea in an earlier paper presented at Sigmetrics 2024 [2]. ~ The short explanation (TL;DR) We propose adding a new napi config parameter: irq_suspend_timeout to help balance CPU usage and network processing efficiency when using IRQ deferral and napi busy poll. If this parameter is set to a non-zero value *and* a user application has enabled preferred busy poll on a busy poll context (via the EPIOCSPARAMS ioctl introduced in commit 18e2bf0edf4d ("eventpoll: Add epoll ioctl for epoll_params")), then application calls to epoll_wait for that context will cause device IRQs and softirq processing to be suspended as long as epoll_wait successfully retrieves data from the NAPI. Each time data is retrieved, the irq_suspend_timeout is deferred. If/when network traffic subsides and epoll_wait returns no data, IRQ suspension is immediately reverted back to the existing napi_defer_hard_irqs and gro_flush_timeout mechanism which was introduced in commit 6f8b12d661d0 ("net: napi: add hard irqs deferral feature")). The irq_suspend_timeout serves as a safety mechanism. If userland takes a long time processing data, irq_suspend_timeout will fire and restart normal NAPI processing. For a more in depth explanation, please continue reading. ~ Comparison with existing mechanisms Interrupt mitigation can be accomplished in napi software, by setting napi_defer_hard_irqs and gro_flush_timeout, or via interrupt coalescing in the NIC. This can be quite efficient, but in both cases, a fixed timeout (or packet count) needs to be configured. However, a fixed timeout cannot effectively support both low- and high-load situations: At low load, an application typically processes a few requests and then waits to receive more input data. In this scenario, a large timeout will cause unnecessary latency. At high load, an application typically processes many requests before being ready to receive more input data. In this case, a small timeout will likely fire prematurely and trigger irq/softirq processing, which interferes with the application's execution. This causes overhead, most likely due to cache contention. While NICs attempt to provide adaptive interrupt coalescing schemes, these cannot properly take into account application-level processing. An alternative packet delivery mechanism is busy-polling, which results in perfect alignment of application processing and network polling. It delivers optimal performance (throughput and latency), but results in 100% cpu utilization and is thus inefficient for below-capacity workloads. We propose to add a new packet delivery mode that properly alternates between busy polling and interrupt-based delivery depending on busy and idle periods of the application. During a busy period, the system operates in busy-polling mode, which avoids interference. During an idle period, the system falls back to interrupt deferral, but with a small timeout to avoid excessive latencies. This delivery mode can also be viewed as an extension of basic interrupt deferral, but alternating between a small and a very large timeout. This delivery mode is efficient, because it avoids softirq execution interfering with application processing during busy periods. It can be used with blocking epoll_wait to conserve cpu cycles during idle periods. The effect of alternating between busy and idle periods is that performance (throughput and latency) is very close to full busy polling, while cpu utilization is lower and very close to interrupt mitigation. ~ Usage details IRQ suspension is introduced via a per-NAPI configuration parameter that controls the maximum time that IRQs can be suspended. Here's how it is intended to work: - The user application (or system administrator) uses the netdev-genl netlink interface to set the pre-existing napi_defer_hard_irqs and gro_flush_timeout NAPI config parameters to enable IRQ deferral. - The user application (or system administrator) sets the proposed irq_suspend_timeout parameter via the netdev-genl netlink interface to a larger value than gro_flush_timeout to enable IRQ suspension. - The user application issues the existing epoll ioctl to set the prefer_busy_poll flag on the epoll context. - The user application then calls epoll_wait to busy poll for network events, as it normally would. - If epoll_wait returns events to userland, IRQs are suspended for the duration of irq_suspend_timeout. - If epoll_wait finds no events and the thread is about to go to sleep, IRQ handling using napi_defer_hard_irqs and gro_flush_timeout is resumed. As long as epoll_wait is retrieving events, IRQs (and softirq processing) for the NAPI being polled remain disabled. When network traffic reduces, eventually a busy poll loop in the kernel will retrieve no data. When this occurs, regular IRQ deferral using gro_flush_timeout for the polled NAPI is re-enabled. Unless IRQ suspension is continued by subsequent calls to epoll_wait, it automatically times out after the irq_suspend_timeout timer expires. Regular deferral is also immediately re-enabled when the epoll context is destroyed. ~ Usage scenario The target scenario for IRQ suspension as packet delivery mode is a system that runs a dominant application with substantial network I/O. The target application can be configured to receive input data up to a certain batch size (via epoll_wait maxevents parameter) and this batch size determines the worst-case latency that application requests might experience. Because packet delivery is suspended during the target application's processing, the batch size also determines the worst-case latency of concurrent applications using the same RX queue(s). gro_flush_timeout should be set as small as possible, but large enough to make sure that a single request is likely not being interfered with. irq_suspend_timeout is largely a safety mechanism against misbehaving applications. It should be set large enough to cover the processing of an entire application batch, i.e., the factor between gro_flush_timeout and irq_suspend_timeout should roughly correspond to the maximum batch size that the target application would process in one go. ~ Design rationale The implementation of the IRQ suspension mechanism very nicely dovetails with the existing mechanism for IRQ deferral when preferred busy poll is enabled (introduced in commit 7fd3253a7de6 ("net: Introduce preferred busy-polling"), see that commit message for more details). While it would be possible to inject the suspend timeout via the existing epoll ioctl, it is more natural to avoid this path for one main reason: An epoll context is linked to NAPI IDs as file descriptors are added; this means any epoll context might suddenly be associated with a different net_device if the application were to replace all existing fds with fds from a different device. In this case, the scope of the suspend timeout becomes unclear and many edge cases for both the user application and the kernel are introduced Only a single iteration through napi busy polling is needed for this mechanism to work effectively. Since an important objective for this mechanism is preserving cpu cycles, exactly one iteration of the napi busy loop is invoked when busy_poll_usecs is set to 0. ~ Important call outs in the implementation - Enabling per epoll-context preferred busy poll will now effectively lead to a nonblocking iteration through napi_busy_loop, even when busy_poll_usecs is 0. See patch 4. - Patches apply cleanly on commit 160a810b2a85 ("net: vxlan: update the document for vxlan_snoop()"). ~ Benchmark configs & descriptions The changes were benchmarked with memcached [3] using the benchmarking tool mutilate [4]. To facilitate benchmarking, a small patch [5] was applied to memcached 1.6.29 to allow setting per-epoll context preferred busy poll and other settings via environment variables. Another small patch [6] was applied to libevent to enable full busy-polling. Multiple scenarios were benchmarked as described below and the scripts used for producing these results can be found on github [7] (note: all scenarios use NAPI-based traffic splitting via SO_INCOMING_ID by passing -N to memcached): - base: - no other options enabled - deferX: - set defer_hard_irqs to 100 - set gro_flush_timeout to X,000 - napibusy: - set defer_hard_irqs to 100 - set gro_flush_timeout to 200,000 - enable busy poll via the existing ioctl (busy_poll_usecs = 64, busy_poll_budget = 64, prefer_busy_poll = true) - fullbusy: - set defer_hard_irqs to 100 - set gro_flush_timeout to 5,000,000 - enable busy poll via the existing ioctl (busy_poll_usecs = 1000, busy_poll_budget = 64, prefer_busy_poll = true) - change memcached's nonblocking epoll_wait invocation (via libevent) to using a 1 ms timeout - suspendX: - set defer_hard_irqs to 100 - set gro_flush_timeout to X,000 - set irq_suspend_timeout to 20,000,000 - enable busy poll via the existing ioctl (busy_poll_usecs = 0, busy_poll_budget = 64, prefer_busy_poll = true) ~ Benchmark results Tested on: Single socket AMD EPYC 7662 64-Core Processor Hyperthreading disabled 4 NUMA Zones (NPS=4) 16 CPUs per NUMA zone (64 cores total) 2 x Dual port 100gbps Mellanox Technologies ConnectX-5 Ex EN NIC The test machine is configured such that a single interface has 8 RX queues. The queues' IRQs and memcached are pinned to CPUs that are NUMA-local to the interface which is under test. The NIC's interrupt coalescing configuration is left at boot-time defaults. Results: Results are shown below. The mechanism added by this series is represented by the 'suspend' cases. Data presented shows a summary over at least 10 runs of each test case [8] using the scripts on github [7]. For latency, the median is shown. For throughput and CPU utilization, the average is shown. The results also include cycles-per-query (cpq) and instruction-per-query (ipq) metrics, following the methodology proposed in [2], to augment the CPU utilization numbers, which could be skewed due to frequency scaling. We find that this does not appear to be the case as CPU utilization and low-level metrics show similar trends. These results were captured using the scripts on github [7] to illustrate how this approach compares with other pre-existing mechanisms. This data is not to be interpreted as scientific data captured in a fully isolated lab setting, but instead as best effort, illustrative information comparing and contrasting tradeoffs. The absolute QPS results are higher than our previous submission, but the relative differences between variants are equivalent. Because the patches have been rebased on 6.12, several factors have likely influenced the overall performance. Most importantly, we had to switch to a new set of basic kernel options, which has likely altered the baseline performance. Because the overall comparison of variants still holds, we have not attempted to recreate the exact set of kernel options from the previous submission. Compare: - Throughput (MAX) and latencies of base vs suspend. - CPU usage of napibusy and fullbusy during lower load (200K, 400K for example) vs suspend. - Latency of the defer variants vs suspend as timeout and load increases. The overall takeaway is that the suspend variants provide a superior combination of high throughput, low latency, and low cpu utilization compared to all other variants. Each of the suspend variants works very well, but some fine-tuning between latency and cpu utilization is still possible by tuning the small timeout (gro_flush_timeout). Note: we've reorganized the results to make comparison among testcases with the same load easier. testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 200K 200024 127 254 458 25 12748 11289 defer10 200K 199991 64 128 166 27 18763 16574 defer20 200K 199986 72 135 178 25 15405 14173 defer50 200K 200025 91 149 198 23 12275 12203 defer200 200K 199996 182 266 326 18 8595 9183 fullbusy 200K 200040 58 123 167 100 43641 23145 napibusy 200K 200009 115 244 299 56 24797 24693 suspend10 200K 200005 63 128 167 32 19559 17240 suspend20 200K 199952 69 132 170 29 16324 14838 suspend50 200K 200019 84 144 189 26 13106 12516 suspend200 200K 199978 168 264 326 20 9331 9643 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 400K 400017 157 292 762 39 9287 9325 defer10 400K 400033 71 141 204 53 13950 12943 defer20 400K 399935 79 150 212 47 12027 11673 defer50 400K 399888 101 171 231 39 9556 9921 defer200 400K 399993 200 287 358 32 7428 8576 fullbusy 400K 400018 63 132 203 100 21827 16062 napibusy 400K 399970 89 230 292 83 18156 16508 suspend10 400K 400061 69 139 202 54 13576 13057 suspend20 400K 399988 73 144 206 49 11930 11773 suspend50 400K 399975 88 161 218 42 9996 10270 suspend200 400K 399954 172 276 353 34 7847 8713 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 600K 600031 166 289 631 61 9188 8787 defer10 600K 599967 85 167 262 75 11833 10947 defer20 600K 599888 89 165 243 66 10513 10362 defer50 600K 600072 109 185 253 55 8664 9190 defer200 600K 599951 222 315 393 45 6892 8213 fullbusy 600K 600041 69 145 227 100 14549 13936 napibusy 600K 599980 79 188 280 96 13927 14155 suspend10 600K 600028 78 159 267 69 10877 11032 suspend20 600K 600026 81 159 254 64 9922 10320 suspend50 600K 600007 96 178 258 57 8681 9331 suspend200 600K 599964 177 295 369 47 7115 8366 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 800K 800034 198 329 698 84 9366 8338 defer10 800K 799718 243 642 1457 95 10532 9007 defer20 800K 800009 132 245 399 89 9956 8979 defer50 800K 800024 136 228 378 80 9002 8598 defer200 800K 799965 255 362 473 66 7481 8147 fullbusy 800K 799927 78 157 253 100 10915 12533 napibusy 800K 799870 81 173 273 99 10826 12532 suspend10 800K 799991 84 167 269 83 9380 9802 suspend20 800K 799979 90 172 290 78 8765 9404 suspend50 800K 800031 106 191 307 71 7945 8805 suspend200 800K 799905 182 307 411 62 6985 8242 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 1000K 919543 3805 6390 14229 98 9324 7978 defer10 1000K 850751 4574 7382 15370 99 10218 8470 defer20 1000K 890296 4736 6862 14858 99 9708 8277 defer50 1000K 932694 3463 6180 13251 97 9148 8053 defer200 1000K 951311 3524 6052 13599 96 8875 7845 fullbusy 1000K 1000011 90 181 278 100 8731 10686 napibusy 1000K 1000050 93 184 280 100 8721 10547 suspend10 1000K 999962 101 193 306 92 8138 8980 suspend20 1000K 1000030 103 191 324 88 7844 8763 suspend50 1000K 1000001 114 202 320 83 7396 8431 suspend200 1000K 999965 185 314 428 76 6733 8072 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base MAX 1005592 4651 6594 14979 100 8679 7918 defer10 MAX 928204 5106 7286 15199 100 9398 8380 defer20 MAX 984663 4774 6518 14920 100 8861 8063 defer50 MAX 1044099 4431 6368 14652 100 8350 7948 defer200 MAX 1040451 4423 6610 14674 100 8380 7931 fullbusy MAX 1236608 3715 3987 12805 100 7051 7936 napibusy MAX 1077516 4345 10155 15957 100 8080 7842 suspend10 MAX 1218344 3760 3990 12585 100 7150 7935 suspend20 MAX 1220056 3752 4053 12602 100 7150 7961 suspend50 MAX 1213666 3791 4103 12919 100 7183 7959 suspend200 MAX 1217411 3768 3988 12863 100 7161 7954 ~ FAQ - Why is a new parameter needed? Does irq_suspend_timeout override gro_flush_timeout? Using the suspend mechanism causes the system to alternate between polling mode and irq-driven packet delivery. During busy periods, irq_suspend_timeout overrides gro_flush_timeout and keeps the system busy polling, but when epoll finds no events, the setting of gro_flush_timeout and napi_defer_hard_irqs determine the next step. There are essentially three possible loops for network processing and packet delivery: 1) hardirq -> softirq -> napi poll; basic interrupt delivery 2) timer -> softirq -> napi poll; deferred irq processing 3) epoll -> busy-poll -> napi poll; busy looping Loop 2) can take control from Loop 1), if gro_flush_timeout and napi_defer_hard_irqs are set. If gro_flush_timeout and napi_defer_hard_irqs are set, Loops 2) and 3) "wrestle" with each other for control. During busy periods, irq_suspend_timeout is used as timer in Loop 2), which essentially tilts this in favour of Loop 3). If gro_flush_timeout and napi_defer_hard_irqs are not set, Loop 3) cannot take control from Loop 1). Therefore, setting gro_flush_timeout and napi_defer_hard_irqs is the recommended usage, because otherwise setting irq_suspend_timeout might not have any discernible effect. We ran experiments with these parameters set to zero and the results are as expected and essentially the same as the base case. - Can the new timeout value be threaded through the new epoll ioctl ? Only with difficulty. The epoll ioctl sets options on an epoll context and the NAPI ID associated with an epoll context can change based on what file descriptors a user app adds to the epoll context. This would introduce complexity in the API from the user perspective and also complexity in the kernel. - Can irq suspend be built by combining NIC coalescing and gro_flush_timeout ? No. The problem is that the long timeout must engage if and only if prefer-busy is active. When using NIC coalescing for the short timeout (without napi_defer_hard_irqs/gro_flush_timeout), an interrupt after an idle period will trigger softirq, which will run napi polling. At this point, prefer-busy is not active, so NIC interrupts would be re-enabled. Then it is not possible for the longer timeout to interject to switch control back to polling. In other words, only by using the software timer for the short timeout, it is possible to extend the timeout without having to reprogram the NIC timer or reach down directly and disable interrupts. Using gro_flush_timeout for the long timeout also has problems, for the same underlying reason. In the current napi implementation, gro_flush_timeout is not tied to prefer-busy. We'd either have to change that and in the process modify the existing deferral mechanism, or introduce a state variable to determine whether gro_flush_timeout is used as long timeout for irq suspend or whether it is used for its default purpose. In an earlier version, we did try something similar to the latter and made it work, but it ends up being a lot more convoluted than our current proposal. - Isn't it already possible to combine busy looping with irq deferral? Yes, in fact enabling irq deferral via napi_defer_hard_irqs and gro_flush_timeout is a precondition for prefer_busy_poll to have an effect. If the application also uses a tight busy loop with essentially nonblocking epoll_wait (accomplished with a very short timeout parameter), this is the fullbusy case shown in the results. An application using blocking epoll_wait is shown as the napibusy case in the result. It's a hybrid approach that provides limited latency benefits compared to the base case and plain irq deferral, but not as good as fullbusy or suspend. ~ Special thanks Several people were involved in earlier stages of the development of this mechanism whom we'd like to thank: - Peter Cai (CC'd), for the initial kernel patch and his contributions to the paper. - Mohammadamin Shafie (CC'd), for testing various versions of the kernel patch and providing helpful feedback. Thanks, Martin and Joe [1]: https://lore.kernel.org/netdev/20240812125717.413108-1-jdamato@fastly.com/ [2]: https://doi.org/10.1145/3626780 [3]: https://github.com/memcached/memcached/blob/master/doc/napi_ids.txt [4]: https://github.com/leverich/mutilate [5]: https://raw.githubusercontent.com/martinkarsten/irqsuspend/main/patches/mem… [6]: https://raw.githubusercontent.com/martinkarsten/irqsuspend/main/patches/lib… [7]: https://github.com/martinkarsten/irqsuspend [8]: https://github.com/martinkarsten/irqsuspend/tree/main/results v4: - Added a new FAQ item to cover letter. - Updated patch 6 to use socat instead of nc in busy_poll_test.sh and updated busy_poller.c to use netlink directly to configure napi params. - Updated the kernel documentation in patch 7 to include more details. - Dropped Stanislav's Acked-by and Bagas' Reviewed-by from patch 7 since the documentation was updated. v3: - Added Stanislav Fomichev's Acked-by to every patch except the newly added selftest. - Added Bagas Sanjaya's Reviewed-by to the documentation patch. - Fixed the commit message of patch 2 to remove a reference to the now non-existent sysfs setting. - Added a self test which tests both "regular" busy poll and busy poll with suspend enabled. This was added as patch 6 as requested by Paolo. netdevsim was chosen instead of veth due to netdevsim's pre-existing support for netdev-genl. See the commit message of patch 6 for more details. v2: https://lore.kernel.org/bpf/20241021015311.95468-1-jdamato@fastly.com/ - Cover letter updated, including a re-run of test data. - Patch 1 rewritten to use netdev-genl instead of sysfs. - Patch 3 updated with a comment added to napi_resume_irqs. - Patch 4 rebased to apply now that commit b9ca079dd6b0 ("eventpoll: Annotate data-race of busy_poll_usecs") has been picked up from VFS. - Patch 6 updated the kernel documentation. rfc -> v1: - Cover letter updated to include more details. - Patch 1 updated to remove the documentation added. This was moved to patch 6 with the rest of the docs (see below). - Patch 5 updated to fix an error uncovered by the kernel build robot. See patch 5's changelog for more details. - Patch 6 added which updates kernel documentation. Joe Damato (2): selftests: net: Add busy_poll_test docs: networking: Describe irq suspension Martin Karsten (5): net: Add napi_struct parameter irq_suspend_timeout net: Suspend softirq when prefer_busy_poll is set net: Add control functions for irq suspension eventpoll: Trigger napi_busy_loop, if prefer_busy_poll is set eventpoll: Control irq suspension for prefer_busy_poll Documentation/netlink/specs/netdev.yaml | 7 + Documentation/networking/napi.rst | 176 +++++++++- fs/eventpoll.c | 35 +- include/linux/netdevice.h | 2 + include/net/busy_poll.h | 3 + include/uapi/linux/netdev.h | 1 + net/core/dev.c | 58 +++- net/core/dev.h | 25 ++ net/core/netdev-genl-gen.c | 5 +- net/core/netdev-genl.c | 12 + tools/include/uapi/linux/netdev.h | 1 + tools/testing/selftests/net/.gitignore | 1 + tools/testing/selftests/net/Makefile | 3 +- tools/testing/selftests/net/busy_poll_test.sh | 164 +++++++++ tools/testing/selftests/net/busy_poller.c | 328 ++++++++++++++++++ 15 files changed, 810 insertions(+), 11 deletions(-) create mode 100755 tools/testing/selftests/net/busy_poll_test.sh create mode 100644 tools/testing/selftests/net/busy_poller.c base-commit: dbb9a7ef347828870df3e5e6ddf19469a3277fc9 -- 2.25.1

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[PATCH net-next v3 0/7] Suspend IRQs during application busy periods

by Joe Damato

Greetings: Welcome to v3, see changelog below. Note that our performance tests were not re-run for this revision as we only updated a commit message and added a selftest. This series introduces a new mechanism, IRQ suspension, which allows network applications using epoll to mask IRQs during periods of high traffic while also reducing tail latency (compared to existing mechanisms, see below) during periods of low traffic. In doing so, this balances CPU consumption with network processing efficiency. Martin Karsten (CC'd) and I have been collaborating on this series for several months and have appreciated the feedback from the community on our RFC [1]. We've updated the cover letter and kernel documentation in an attempt to more clearly explain how this mechanism works, how applications can use it, and how it compares to existing mechanisms in the kernel. We've added an additional test case, 'fullbusy', achieved by modifying libevent for comparison. See below for a detailed description, link to the patch, and test results. I briefly mentioned this idea at netdev conf 2024 (for those who were there) and Martin described this idea in an earlier paper presented at Sigmetrics 2024 [2]. ~ The short explanation (TL;DR) We propose adding a new napi config parameter: irq_suspend_timeout to help balance CPU usage and network processing efficiency when using IRQ deferral and napi busy poll. If this parameter is set to a non-zero value *and* a user application has enabled preferred busy poll on a busy poll context (via the EPIOCSPARAMS ioctl introduced in commit 18e2bf0edf4d ("eventpoll: Add epoll ioctl for epoll_params")), then application calls to epoll_wait for that context will cause device IRQs and softirq processing to be suspended as long as epoll_wait successfully retrieves data from the NAPI. Each time data is retrieved, the irq_suspend_timeout is deferred. If/when network traffic subsides and epoll_wait returns no data, IRQ suspension is immediately reverted back to the existing napi_defer_hard_irqs and gro_flush_timeout mechanism which was introduced in commit 6f8b12d661d0 ("net: napi: add hard irqs deferral feature")). The irq_suspend_timeout serves as a safety mechanism. If userland takes a long time processing data, irq_suspend_timeout will fire and restart normal NAPI processing. For a more in depth explanation, please continue reading. ~ Comparison with existing mechanisms Interrupt mitigation can be accomplished in napi software, by setting napi_defer_hard_irqs and gro_flush_timeout, or via interrupt coalescing in the NIC. This can be quite efficient, but in both cases, a fixed timeout (or packet count) needs to be configured. However, a fixed timeout cannot effectively support both low- and high-load situations: At low load, an application typically processes a few requests and then waits to receive more input data. In this scenario, a large timeout will cause unnecessary latency. At high load, an application typically processes many requests before being ready to receive more input data. In this case, a small timeout will likely fire prematurely and trigger irq/softirq processing, which interferes with the application's execution. This causes overhead, most likely due to cache contention. While NICs attempt to provide adaptive interrupt coalescing schemes, these cannot properly take into account application-level processing. An alternative packet delivery mechanism is busy-polling, which results in perfect alignment of application processing and network polling. It delivers optimal performance (throughput and latency), but results in 100% cpu utilization and is thus inefficient for below-capacity workloads. We propose to add a new packet delivery mode that properly alternates between busy polling and interrupt-based delivery depending on busy and idle periods of the application. During a busy period, the system operates in busy-polling mode, which avoids interference. During an idle period, the system falls back to interrupt deferral, but with a small timeout to avoid excessive latencies. This delivery mode can also be viewed as an extension of basic interrupt deferral, but alternating between a small and a very large timeout. This delivery mode is efficient, because it avoids softirq execution interfering with application processing during busy periods. It can be used with blocking epoll_wait to conserve cpu cycles during idle periods. The effect of alternating between busy and idle periods is that performance (throughput and latency) is very close to full busy polling, while cpu utilization is lower and very close to interrupt mitigation. ~ Usage details IRQ suspension is introduced via a per-NAPI configuration parameter that controls the maximum time that IRQs can be suspended. Here's how it is intended to work: - The user application (or system administrator) uses the netdev-genl netlink interface to set the pre-existing napi_defer_hard_irqs and gro_flush_timeout NAPI config parameters to enable IRQ deferral. - The user application (or system administrator) sets the proposed irq_suspend_timeout parameter via the netdev-genl netlink interface to a larger value than gro_flush_timeout to enable IRQ suspension. - The user application issues the existing epoll ioctl to set the prefer_busy_poll flag on the epoll context. - The user application then calls epoll_wait to busy poll for network events, as it normally would. - If epoll_wait returns events to userland, IRQs are suspended for the duration of irq_suspend_timeout. - If epoll_wait finds no events and the thread is about to go to sleep, IRQ handling using napi_defer_hard_irqs and gro_flush_timeout is resumed. As long as epoll_wait is retrieving events, IRQs (and softirq processing) for the NAPI being polled remain disabled. When network traffic reduces, eventually a busy poll loop in the kernel will retrieve no data. When this occurs, regular IRQ deferral using gro_flush_timeout for the polled NAPI is re-enabled. Unless IRQ suspension is continued by subsequent calls to epoll_wait, it automatically times out after the irq_suspend_timeout timer expires. Regular deferral is also immediately re-enabled when the epoll context is destroyed. ~ Usage scenario The target scenario for IRQ suspension as packet delivery mode is a system that runs a dominant application with substantial network I/O. The target application can be configured to receive input data up to a certain batch size (via epoll_wait maxevents parameter) and this batch size determines the worst-case latency that application requests might experience. Because packet delivery is suspended during the target application's processing, the batch size also determines the worst-case latency of concurrent applications using the same RX queue(s). gro_flush_timeout should be set as small as possible, but large enough to make sure that a single request is likely not being interfered with. irq_suspend_timeout is largely a safety mechanism against misbehaving applications. It should be set large enough to cover the processing of an entire application batch, i.e., the factor between gro_flush_timeout and irq_suspend_timeout should roughly correspond to the maximum batch size that the target application would process in one go. ~ Design rationale The implementation of the IRQ suspension mechanism very nicely dovetails with the existing mechanism for IRQ deferral when preferred busy poll is enabled (introduced in commit 7fd3253a7de6 ("net: Introduce preferred busy-polling"), see that commit message for more details). While it would be possible to inject the suspend timeout via the existing epoll ioctl, it is more natural to avoid this path for one main reason: An epoll context is linked to NAPI IDs as file descriptors are added; this means any epoll context might suddenly be associated with a different net_device if the application were to replace all existing fds with fds from a different device. In this case, the scope of the suspend timeout becomes unclear and many edge cases for both the user application and the kernel are introduced Only a single iteration through napi busy polling is needed for this mechanism to work effectively. Since an important objective for this mechanism is preserving cpu cycles, exactly one iteration of the napi busy loop is invoked when busy_poll_usecs is set to 0. ~ Important call outs in the implementation - Enabling per epoll-context preferred busy poll will now effectively lead to a nonblocking iteration through napi_busy_loop, even when busy_poll_usecs is 0. See patch 4. - Patches apply cleanly on commit 160a810b2a85 ("net: vxlan: update the document for vxlan_snoop()"). ~ Benchmark configs & descriptions The changes were benchmarked with memcached [3] using the benchmarking tool mutilate [4]. To facilitate benchmarking, a small patch [5] was applied to memcached 1.6.29 to allow setting per-epoll context preferred busy poll and other settings via environment variables. Another small patch [6] was applied to libevent to enable full busy-polling. Multiple scenarios were benchmarked as described below and the scripts used for producing these results can be found on github [7] (note: all scenarios use NAPI-based traffic splitting via SO_INCOMING_ID by passing -N to memcached): - base: - no other options enabled - deferX: - set defer_hard_irqs to 100 - set gro_flush_timeout to X,000 - napibusy: - set defer_hard_irqs to 100 - set gro_flush_timeout to 200,000 - enable busy poll via the existing ioctl (busy_poll_usecs = 64, busy_poll_budget = 64, prefer_busy_poll = true) - fullbusy: - set defer_hard_irqs to 100 - set gro_flush_timeout to 5,000,000 - enable busy poll via the existing ioctl (busy_poll_usecs = 1000, busy_poll_budget = 64, prefer_busy_poll = true) - change memcached's nonblocking epoll_wait invocation (via libevent) to using a 1 ms timeout - suspendX: - set defer_hard_irqs to 100 - set gro_flush_timeout to X,000 - set irq_suspend_timeout to 20,000,000 - enable busy poll via the existing ioctl (busy_poll_usecs = 0, busy_poll_budget = 64, prefer_busy_poll = true) ~ Benchmark results Tested on: Single socket AMD EPYC 7662 64-Core Processor Hyperthreading disabled 4 NUMA Zones (NPS=4) 16 CPUs per NUMA zone (64 cores total) 2 x Dual port 100gbps Mellanox Technologies ConnectX-5 Ex EN NIC The test machine is configured such that a single interface has 8 RX queues. The queues' IRQs and memcached are pinned to CPUs that are NUMA-local to the interface which is under test. The NIC's interrupt coalescing configuration is left at boot-time defaults. Results: Results are shown below. The mechanism added by this series is represented by the 'suspend' cases. Data presented shows a summary over at least 10 runs of each test case [8] using the scripts on github [7]. For latency, the median is shown. For throughput and CPU utilization, the average is shown. The results also include cycles-per-query (cpq) and instruction-per-query (ipq) metrics, following the methodology proposed in [2], to augment the CPU utilization numbers, which could be skewed due to frequency scaling. We find that this does not appear to be the case as CPU utilization and low-level metrics show similar trends. These results were captured using the scripts on github [7] to illustrate how this approach compares with other pre-existing mechanisms. This data is not to be interpreted as scientific data captured in a fully isolated lab setting, but instead as best effort, illustrative information comparing and contrasting tradeoffs. The absolute QPS results are higher than our previous submission, but the relative differences between variants are equivalent. Because the patches have been rebased on 6.12, several factors have likely influenced the overall performance. Most importantly, we had to switch to a new set of basic kernel options, which has likely altered the baseline performance. Because the overall comparison of variants still holds, we have not attempted to recreate the exact set of kernel options from the previous submission. Compare: - Throughput (MAX) and latencies of base vs suspend. - CPU usage of napibusy and fullbusy during lower load (200K, 400K for example) vs suspend. - Latency of the defer variants vs suspend as timeout and load increases. The overall takeaway is that the suspend variants provide a superior combination of high throughput, low latency, and low cpu utilization compared to all other variants. Each of the suspend variants works very well, but some fine-tuning between latency and cpu utilization is still possible by tuning the small timeout (gro_flush_timeout). Note: we've reorganized the results to make comparison among testcases with the same load easier. testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 200K 200024 127 254 458 25 12748 11289 defer10 200K 199991 64 128 166 27 18763 16574 defer20 200K 199986 72 135 178 25 15405 14173 defer50 200K 200025 91 149 198 23 12275 12203 defer200 200K 199996 182 266 326 18 8595 9183 fullbusy 200K 200040 58 123 167 100 43641 23145 napibusy 200K 200009 115 244 299 56 24797 24693 suspend10 200K 200005 63 128 167 32 19559 17240 suspend20 200K 199952 69 132 170 29 16324 14838 suspend50 200K 200019 84 144 189 26 13106 12516 suspend200 200K 199978 168 264 326 20 9331 9643 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 400K 400017 157 292 762 39 9287 9325 defer10 400K 400033 71 141 204 53 13950 12943 defer20 400K 399935 79 150 212 47 12027 11673 defer50 400K 399888 101 171 231 39 9556 9921 defer200 400K 399993 200 287 358 32 7428 8576 fullbusy 400K 400018 63 132 203 100 21827 16062 napibusy 400K 399970 89 230 292 83 18156 16508 suspend10 400K 400061 69 139 202 54 13576 13057 suspend20 400K 399988 73 144 206 49 11930 11773 suspend50 400K 399975 88 161 218 42 9996 10270 suspend200 400K 399954 172 276 353 34 7847 8713 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 600K 600031 166 289 631 61 9188 8787 defer10 600K 599967 85 167 262 75 11833 10947 defer20 600K 599888 89 165 243 66 10513 10362 defer50 600K 600072 109 185 253 55 8664 9190 defer200 600K 599951 222 315 393 45 6892 8213 fullbusy 600K 600041 69 145 227 100 14549 13936 napibusy 600K 599980 79 188 280 96 13927 14155 suspend10 600K 600028 78 159 267 69 10877 11032 suspend20 600K 600026 81 159 254 64 9922 10320 suspend50 600K 600007 96 178 258 57 8681 9331 suspend200 600K 599964 177 295 369 47 7115 8366 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 800K 800034 198 329 698 84 9366 8338 defer10 800K 799718 243 642 1457 95 10532 9007 defer20 800K 800009 132 245 399 89 9956 8979 defer50 800K 800024 136 228 378 80 9002 8598 defer200 800K 799965 255 362 473 66 7481 8147 fullbusy 800K 799927 78 157 253 100 10915 12533 napibusy 800K 799870 81 173 273 99 10826 12532 suspend10 800K 799991 84 167 269 83 9380 9802 suspend20 800K 799979 90 172 290 78 8765 9404 suspend50 800K 800031 106 191 307 71 7945 8805 suspend200 800K 799905 182 307 411 62 6985 8242 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 1000K 919543 3805 6390 14229 98 9324 7978 defer10 1000K 850751 4574 7382 15370 99 10218 8470 defer20 1000K 890296 4736 6862 14858 99 9708 8277 defer50 1000K 932694 3463 6180 13251 97 9148 8053 defer200 1000K 951311 3524 6052 13599 96 8875 7845 fullbusy 1000K 1000011 90 181 278 100 8731 10686 napibusy 1000K 1000050 93 184 280 100 8721 10547 suspend10 1000K 999962 101 193 306 92 8138 8980 suspend20 1000K 1000030 103 191 324 88 7844 8763 suspend50 1000K 1000001 114 202 320 83 7396 8431 suspend200 1000K 999965 185 314 428 76 6733 8072 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base MAX 1005592 4651 6594 14979 100 8679 7918 defer10 MAX 928204 5106 7286 15199 100 9398 8380 defer20 MAX 984663 4774 6518 14920 100 8861 8063 defer50 MAX 1044099 4431 6368 14652 100 8350 7948 defer200 MAX 1040451 4423 6610 14674 100 8380 7931 fullbusy MAX 1236608 3715 3987 12805 100 7051 7936 napibusy MAX 1077516 4345 10155 15957 100 8080 7842 suspend10 MAX 1218344 3760 3990 12585 100 7150 7935 suspend20 MAX 1220056 3752 4053 12602 100 7150 7961 suspend50 MAX 1213666 3791 4103 12919 100 7183 7959 suspend200 MAX 1217411 3768 3988 12863 100 7161 7954 ~ FAQ - Can the new timeout value be threaded through the new epoll ioctl ? Only with difficulty. The epoll ioctl sets options on an epoll context and the NAPI ID associated with an epoll context can change based on what file descriptors a user app adds to the epoll context. This would introduce complexity in the API from the user perspective and also complexity in the kernel. - Can irq suspend be built by combining NIC coalescing and gro_flush_timeout ? No. The problem is that the long timeout must engage if and only if prefer-busy is active. When using NIC coalescing for the short timeout (without napi_defer_hard_irqs/gro_flush_timeout), an interrupt after an idle period will trigger softirq, which will run napi polling. At this point, prefer-busy is not active, so NIC interrupts would be re-enabled. Then it is not possible for the longer timeout to interject to switch control back to polling. In other words, only by using the software timer for the short timeout, it is possible to extend the timeout without having to reprogram the NIC timer or reach down directly and disable interrupts. Using gro_flush_timeout for the long timeout also has problems, for the same underlying reason. In the current napi implementation, gro_flush_timeout is not tied to prefer-busy. We'd either have to change that and in the process modify the existing deferral mechanism, or introduce a state variable to determine whether gro_flush_timeout is used as long timeout for irq suspend or whether it is used for its default purpose. In an earlier version, we did try something similar to the latter and made it work, but it ends up being a lot more convoluted than our current proposal. - Isn't it already possible to combine busy looping with irq deferral? Yes, in fact enabling irq deferral via napi_defer_hard_irqs and gro_flush_timeout is a precondition for prefer_busy_poll to have an effect. If the application also uses a tight busy loop with essentially nonblocking epoll_wait (accomplished with a very short timeout parameter), this is the fullbusy case shown in the results. An application using blocking epoll_wait is shown as the napibusy case in the result. It's a hybrid approach that provides limited latency benefits compared to the base case and plain irq deferral, but not as good as fullbusy or suspend. ~ Special thanks Several people were involved in earlier stages of the development of this mechanism whom we'd like to thank: - Peter Cai (CC'd), for the initial kernel patch and his contributions to the paper. - Mohammadamin Shafie (CC'd), for testing various versions of the kernel patch and providing helpful feedback. Thanks, Martin and Joe [1]: https://lore.kernel.org/netdev/20240812125717.413108-1-jdamato@fastly.com/ [2]: https://doi.org/10.1145/3626780 [3]: https://github.com/memcached/memcached/blob/master/doc/napi_ids.txt [4]: https://github.com/leverich/mutilate [5]: https://raw.githubusercontent.com/martinkarsten/irqsuspend/main/patches/mem… [6]: https://raw.githubusercontent.com/martinkarsten/irqsuspend/main/patches/lib… [7]: https://github.com/martinkarsten/irqsuspend [8]: https://github.com/martinkarsten/irqsuspend/tree/main/results v3: - Added Stanislav Fomichev's Acked-by to every patch except the newly added selftest. - Added Bagas Sanjaya's Reviewed-by to the documentation patch. - Fixed the commit message of patch 2 to remove a reference to the now non-existent sysfs setting. - Added a self test which tests both "regular" busy poll and busy poll with suspend enabled. This was added as patch 6 as requested by Paolo. netdevsim was chosen instead of veth due to netdevsim's pre-existing support for netdev-genl. See the commit message of patch 6 for more details. v2: https://lore.kernel.org/bpf/20241021015311.95468-1-jdamato@fastly.com/ - Cover letter updated, including a re-run of test data. - Patch 1 rewritten to use netdev-genl instead of sysfs. - Patch 3 updated with a comment added to napi_resume_irqs. - Patch 4 rebased to apply now that commit b9ca079dd6b0 ("eventpoll: Annotate data-race of busy_poll_usecs") has been picked up from VFS. - Patch 6 updated the kernel documentation. rfc -> v1: - Cover letter updated to include more details. - Patch 1 updated to remove the documentation added. This was moved to patch 6 with the rest of the docs (see below). - Patch 5 updated to fix an error uncovered by the kernel build robot. See patch 5's changelog for more details. - Patch 6 added which updates kernel documentation. Joe Damato (2): selftests: net: Add busy_poll_test docs: networking: Describe irq suspension Martin Karsten (5): net: Add napi_struct parameter irq_suspend_timeout net: Suspend softirq when prefer_busy_poll is set net: Add control functions for irq suspension eventpoll: Trigger napi_busy_loop, if prefer_busy_poll is set eventpoll: Control irq suspension for prefer_busy_poll Documentation/netlink/specs/netdev.yaml | 7 + Documentation/networking/napi.rst | 132 +++++++++- fs/eventpoll.c | 35 ++- include/linux/netdevice.h | 2 + include/net/busy_poll.h | 3 + include/uapi/linux/netdev.h | 1 + net/core/dev.c | 58 ++++- net/core/dev.h | 25 ++ net/core/netdev-genl-gen.c | 5 +- net/core/netdev-genl.c | 12 + tools/include/uapi/linux/netdev.h | 1 + tools/testing/selftests/net/.gitignore | 1 + tools/testing/selftests/net/Makefile | 2 + tools/testing/selftests/net/busy_poll_test.sh | 164 ++++++++++++ tools/testing/selftests/net/busy_poller.c | 245 ++++++++++++++++++ 15 files changed, 683 insertions(+), 10 deletions(-) create mode 100755 tools/testing/selftests/net/busy_poll_test.sh create mode 100644 tools/testing/selftests/net/busy_poller.c base-commit: 9e114ec8084020e10e1cb7b43dbbf6e69940866b -- 2.25.1

8 months

2
3
0 0

[PATCH] kselftest/arm64: Use ksft_perror() to log MTE failures

by Mark Brown

The logging in the allocation helpers variously uses ksft_print_msg() with very intermittent logging of errno and perror() (which won't produce KTAP conformant output) when logging the result of API calls that set errno. Standardise on using the ksft_perror() helper in these cases so that more information is available should the tests fail. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/arm64/mte/mte_common_util.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/tools/testing/selftests/arm64/mte/mte_common_util.c b/tools/testing/selftests/arm64/mte/mte_common_util.c index 00ffd34c66d301ee7d5c99e6b8d9d5d944520b7f..46958b58801e90ceb79be76f57c7f72b50d43b3c 100644 --- a/tools/testing/selftests/arm64/mte/mte_common_util.c +++ b/tools/testing/selftests/arm64/mte/mte_common_util.c @@ -150,13 +150,13 @@ static void *__mte_allocate_memory_range(size_t size, int mem_type, int mapping, map_flag |= MAP_PRIVATE; ptr = mmap(NULL, entire_size, prot_flag, map_flag, fd, 0); if (ptr == MAP_FAILED) { - ksft_print_msg("FAIL: mmap allocation\n"); + ksft_perror("mmap()"); return NULL; } if (mem_type == USE_MPROTECT) { if (mprotect(ptr, entire_size, prot_flag | PROT_MTE)) { + ksft_perror("mprotect(PROT_MTE)"); munmap(ptr, size); - ksft_print_msg("FAIL: mprotect PROT_MTE property\n"); return NULL; } } @@ -190,13 +190,13 @@ void *mte_allocate_file_memory(size_t size, int mem_type, int mapping, bool tags lseek(fd, 0, SEEK_SET); for (index = INIT_BUFFER_SIZE; index < size; index += INIT_BUFFER_SIZE) { if (write(fd, buffer, INIT_BUFFER_SIZE) != INIT_BUFFER_SIZE) { - perror("initialising buffer"); + ksft_perror("initialising buffer"); return NULL; } } index -= INIT_BUFFER_SIZE; if (write(fd, buffer, size - index) != size - index) { - perror("initialising buffer"); + ksft_perror("initialising buffer"); return NULL; } return __mte_allocate_memory_range(size, mem_type, mapping, 0, 0, tags, fd); @@ -217,12 +217,12 @@ void *mte_allocate_file_memory_tag_range(size_t size, int mem_type, int mapping, lseek(fd, 0, SEEK_SET); for (index = INIT_BUFFER_SIZE; index < map_size; index += INIT_BUFFER_SIZE) if (write(fd, buffer, INIT_BUFFER_SIZE) != INIT_BUFFER_SIZE) { - perror("initialising buffer"); + ksft_perror("initialising buffer"); return NULL; } index -= INIT_BUFFER_SIZE; if (write(fd, buffer, map_size - index) != map_size - index) { - perror("initialising buffer"); + ksft_perror("initialising buffer"); return NULL; } return __mte_allocate_memory_range(size, mem_type, mapping, range_before, @@ -359,7 +359,7 @@ int create_temp_file(void) /* Create a file in the tmpfs filesystem */ fd = mkstemp(&filename[0]); if (fd == -1) { - perror(filename); + ksft_perror(filename); ksft_print_msg("FAIL: Unable to open temporary file\n"); return 0; } --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241028-arm64-mte-test-logging-6c6e737b1c62 Best regards, -- Mark Brown <broonie(a)kernel.org>

8 months

3
2
0 0

[PATCH] kselftest/arm64: Fix encoding for SVE B16B16 test

by Mark Brown

The test for SVE_B16B16 had a cut'n'paste of a SME instruction, fix it with a relevant SVE instruction. Fixes: 44d10c27bd75 ("kselftest/arm64: Add 2023 DPISA hwcap test coverage") Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/arm64/abi/hwcap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/arm64/abi/hwcap.c b/tools/testing/selftests/arm64/abi/hwcap.c index f2d6007a2b983eba77a880ec7e614396a6cb1377..1e4ed89802f76c2bcbe4bfd1a9a987970db8b97d 100644 --- a/tools/testing/selftests/arm64/abi/hwcap.c +++ b/tools/testing/selftests/arm64/abi/hwcap.c @@ -361,8 +361,8 @@ static void sveaes_sigill(void) static void sveb16b16_sigill(void) { - /* BFADD ZA.H[W0, 0], {Z0.H-Z1.H} */ - asm volatile(".inst 0xC1E41C00" : : : ); + /* BFADD Z0.H, Z0.H, Z0.H */ + asm volatile(".inst 0x65000000" : : : ); } static void svepmull_sigill(void) --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241024-arm64-b16b16-test-a1c7bad2478e Best regards, -- Mark Brown <broonie(a)kernel.org>

8 months

2
1
0 0

[PATCH RFC v2 0/5] Verify bias functionality for pinctrl_paris driver through new gpio test

by Nícolas F. R. A. Prado

This series was motivated by the regression fixed by 166bf8af9122 ("pinctrl: mediatek: common-v2: Fix broken bias-disable for PULL_PU_PD_RSEL_TYPE"). A bug was introduced in the pinctrl_paris driver which prevented certain pins from having their bias configured. Running this test on the mt8195-tomato platform with the test plan included below[1] shows the test passing with the fix applied, but failing without the fix: With fix: $ ./gpio-setget-config.py TAP version 13 # Using test plan file: ./google,tomato.yaml 1..3 ok 1 pinctrl_paris.34.pull-up ok 2 pinctrl_paris.34.pull-down ok 3 pinctrl_paris.34.disabled # Totals: pass:3 fail:0 xfail:0 xpass:0 skip:0 error:0 Without fix: $ ./gpio-setget-config.py TAP version 13 # Using test plan file: ./google,tomato.yaml 1..3 # Bias doesn't match: Expected pull-up, read pull-down. not ok 1 pinctrl_paris.34.pull-up ok 2 pinctrl_paris.34.pull-down # Bias doesn't match: Expected disabled, read pull-down. not ok 3 pinctrl_paris.34.disabled # Totals: pass:1 fail:2 xfail:0 xpass:0 skip:0 error:0 In order to achieve this, the first three patches expose bias configuration through the GPIO API in the MediaTek pinctrl drivers, notably, pinctrl_paris, patch 4 extends the gpio-mockup-cdev utility for use by patch 5, and patch 5 introduces a new GPIO kselftest that takes a test plan in YAML, which can be tailored per-platform to specify the configurations to test, and sets and gets back each pin configuration to verify that they match and thus that the driver is behaving as expected. Since the GPIO uAPI only allows setting the pin configuration, getting it back is done through pinconf-pins in the pinctrl debugfs folder. The test currently only verifies bias but it would be easy to extend to verify other pin configurations. The test plan YAML file can be customized for each use-case and is platform-dependant. For that reason, only an example is included in patch 3 and the user is supposed to provide their test plan. That said, the aim is to collect test plans for ease of use at [2]. [1] This is the test plan used for mt8195-tomato: - label: "pinctrl_paris" tests: # Pin 34 has type MTK_PULL_PU_PD_RSEL_TYPE and is unused. # Setting bias to MTK_PULL_PU_PD_RSEL_TYPE pins was fixed by # 166bf8af9122 ("pinctrl: mediatek: common-v2: Fix broken bias-disable for PULL_PU_PD_RSEL_TYPE") - pin: 34 bias: "pull-up" - pin: 34 bias: "pull-down" - pin: 34 bias: "disabled" [2] https://github.com/kernelci/platform-test-parameters Signed-off-by: Nícolas F. R. A. Prado <nfraprado(a)collabora.com> --- Changes in v2: - Added patches 2 and 3 enabling the extra GPIO pin configurations on the other mediatek drivers: pinctrl-moore and pinctrl-mtk-common - Tweaked function name in patch 1: mtk_pinconf_set -> mtk_paris_pin_config_set, to make it clear it is not a pinconf_ops - Adjusted commit message to make it clear the current support is limited to pins supported by the EINT controller - Link to v1: https://lore.kernel.org/r/20240909-kselftest-gpio-set-get-config-v1-0-16a06… --- Nícolas F. R. A. Prado (5): pinctrl: mediatek: paris: Expose more configurations to GPIO set_config pinctrl: mediatek: moore: Expose more configurations to GPIO set_config pinctrl: mediatek: common: Expose more configurations to GPIO set_config selftest: gpio: Add wait flag to gpio-mockup-cdev selftest: gpio: Add a new set-get config test drivers/pinctrl/mediatek/pinctrl-moore.c | 283 +++++++++++---------- drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 48 ++-- drivers/pinctrl/mediatek/pinctrl-paris.c | 26 +- tools/testing/selftests/gpio/Makefile | 2 +- tools/testing/selftests/gpio/gpio-mockup-cdev.c | 14 +- .../gpio-set-get-config-example-test-plan.yaml | 15 ++ .../testing/selftests/gpio/gpio-set-get-config.py | 183 +++++++++++++ 7 files changed, 395 insertions(+), 176 deletions(-) --- base-commit: a39230ecf6b3057f5897bc4744a790070cfbe7a8 change-id: 20240906-kselftest-gpio-set-get-config-6e5bb670c1a5 Best regards, -- Nícolas F. R. A. Prado <nfraprado(a)collabora.com>

8 months

3
12
0 0

[PATCH v4] net: ipv4: Cache pmtu for all packet paths if multipath enabled

by Vladimir Vdovin

Check number of paths by fib_info_num_path(), and update_or_create_fnhe() for every path. Problem is that pmtu is cached only for the oif that has received icmp message "need to frag", other oifs will still try to use "default" iface mtu. V4: - fix selftest, do route lookup before checking cached exceptions V3: - added selftest - fixed compile error V2: - fix fib_info_num_path parameter pass An example topology showing the problem: | host1 +---------+ | dummy0 | 10.179.20.18/32 mtu9000 +---------+ +-----------+----------------+ +---------+ +---------+ | ens17f0 | 10.179.2.141/31 | ens17f1 | 10.179.2.13/31 +---------+ +---------+ | (all here have mtu 9000) | +------+ +------+ | ro1 | 10.179.2.140/31 | ro2 | 10.179.2.12/31 +------+ +------+ | | ---------+------------+-------------------+------ | +-----+ | ro3 | 10.10.10.10 mtu1500 +-----+ | ======================================== some networks ======================================== | +-----+ | eth0| 10.10.30.30 mtu9000 +-----+ | host2 host1 have enabled multipath and sysctl net.ipv4.fib_multipath_hash_policy = 1: default proto static src 10.179.20.18 nexthop via 10.179.2.12 dev ens17f1 weight 1 nexthop via 10.179.2.140 dev ens17f0 weight 1 When host1 tries to do pmtud from 10.179.20.18/32 to host2, host1 receives at ens17f1 iface an icmp packet from ro3 that ro3 mtu=1500. And host1 caches it in nexthop exceptions cache. Problem is that it is cached only for the iface that has received icmp, and there is no way that ro3 will send icmp msg to host1 via another path. Host1 now have this routes to host2: ip r g 10.10.30.30 sport 30000 dport 443 10.10.30.30 via 10.179.2.12 dev ens17f1 src 10.179.20.18 uid 0 cache expires 521sec mtu 1500 ip r g 10.10.30.30 sport 30033 dport 443 10.10.30.30 via 10.179.2.140 dev ens17f0 src 10.179.20.18 uid 0 cache So when host1 tries again to reach host2 with mtu>1500, if packet flow is lucky enough to be hashed with oif=ens17f1 its ok, if oif=ens17f0 it blackholes and still gets icmp msgs from ro3 to ens17f1, until lucky day when ro3 will send it through another flow to ens17f0. Signed-off-by: Vladimir Vdovin <deliran(a)verdict.gg> --- net/ipv4/route.c | 13 +++++ tools/testing/selftests/net/pmtu.sh | 79 ++++++++++++++++++++++++++++- 2 files changed, 91 insertions(+), 1 deletion(-) diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 723ac9181558..41162b5cc4cb 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1027,6 +1027,19 @@ static void __ip_rt_update_pmtu(struct rtable *rt, struct flowi4 *fl4, u32 mtu) struct fib_nh_common *nhc; fib_select_path(net, &res, fl4, NULL); +#ifdef CONFIG_IP_ROUTE_MULTIPATH + if (fib_info_num_path(res.fi) > 1) { + int nhsel; + + for (nhsel = 0; nhsel < fib_info_num_path(res.fi); nhsel++) { + nhc = fib_info_nhc(res.fi, nhsel); + update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, + jiffies + net->ipv4.ip_rt_mtu_expires); + } + rcu_read_unlock(); + return; + } +#endif /* CONFIG_IP_ROUTE_MULTIPATH */ nhc = FIB_RES_NHC(res); update_or_create_fnhe(nhc, fl4->daddr, 0, mtu, lock, jiffies + net->ipv4.ip_rt_mtu_expires); diff --git a/tools/testing/selftests/net/pmtu.sh b/tools/testing/selftests/net/pmtu.sh index 569bce8b6383..f7ced4c436fb 100755 --- a/tools/testing/selftests/net/pmtu.sh +++ b/tools/testing/selftests/net/pmtu.sh @@ -266,7 +266,8 @@ tests=" list_flush_ipv4_exception ipv4: list and flush cached exceptions 1 list_flush_ipv6_exception ipv6: list and flush cached exceptions 1 pmtu_ipv4_route_change ipv4: PMTU exception w/route replace 1 - pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1" + pmtu_ipv6_route_change ipv6: PMTU exception w/route replace 1 + pmtu_ipv4_mp_exceptions ipv4: PMTU multipath nh exceptions 0" # Addressing and routing for tests with routers: four network segments, with # index SEGMENT between 1 and 4, a common prefix (PREFIX4 or PREFIX6) and an @@ -2329,6 +2330,82 @@ test_pmtu_ipv6_route_change() { test_pmtu_ipvX_route_change 6 } +test_pmtu_ipv4_mp_exceptions() { + setup namespaces routing || return $ksft_skip + + ip nexthop ls >/dev/null 2>&1 + if [ $? -ne 0 ]; then + echo "Nexthop objects not supported; skipping tests" + exit $ksft_skip + fi + + trace "${ns_a}" veth_A-R1 "${ns_r1}" veth_R1-A \ + "${ns_r1}" veth_R1-B "${ns_b}" veth_B-R1 \ + "${ns_a}" veth_A-R2 "${ns_r2}" veth_R2-A \ + "${ns_r2}" veth_R2-B "${ns_b}" veth_B-R2 + + dummy0_a="192.168.99.99" + dummy0_b="192.168.88.88" + + # Set up initial MTU values + mtu "${ns_a}" veth_A-R1 2000 + mtu "${ns_r1}" veth_R1-A 2000 + mtu "${ns_r1}" veth_R1-B 1500 + mtu "${ns_b}" veth_B-R1 1500 + + mtu "${ns_a}" veth_A-R2 2000 + mtu "${ns_r2}" veth_R2-A 2000 + mtu "${ns_r2}" veth_R2-B 1500 + mtu "${ns_b}" veth_B-R2 1500 + + fail=0 + + #Set up host A with multipath routes to host B dummy0_b + run_cmd ${ns_a} sysctl -q net.ipv4.fib_multipath_hash_policy=1 + run_cmd ${ns_a} sysctl -q net.ipv4.ip_forward=1 + run_cmd ${ns_a} ip link add dummy0 mtu 2000 type dummy + run_cmd ${ns_a} ip link set dummy0 up + run_cmd ${ns_a} ip addr add ${dummy0_a} dev dummy0 + run_cmd ${ns_a} ip nexthop add id 201 via ${prefix4}.${a_r1}.2 dev veth_A-R1 + run_cmd ${ns_a} ip nexthop add id 202 via ${prefix4}.${a_r2}.2 dev veth_A-R2 + run_cmd ${ns_a} ip nexthop add id 203 group 201/202 + run_cmd ${ns_a} ip route add ${dummy0_b} nhid 203 + + #Set up host B with multipath routes to host A dummy0_a + run_cmd ${ns_b} sysctl -q net.ipv4.fib_multipath_hash_policy=1 + run_cmd ${ns_b} sysctl -q net.ipv4.ip_forward=1 + run_cmd ${ns_b} ip link add dummy0 mtu 2000 type dummy + run_cmd ${ns_b} ip link set dummy0 up + run_cmd ${ns_b} ip addr add ${dummy0_b} dev dummy0 + run_cmd ${ns_b} ip nexthop add id 201 via ${prefix4}.${b_r1}.2 dev veth_A-R1 + run_cmd ${ns_b} ip nexthop add id 202 via ${prefix4}.${b_r2}.2 dev veth_A-R2 + run_cmd ${ns_b} ip nexthop add id 203 group 201/202 + run_cmd ${ns_b} ip route add ${dummy0_a} nhid 203 + + #Set up routers with routes to dummies + run_cmd ${ns_r1} ip route add ${dummy0_a} via ${prefix4}.${a_r1}.1 + run_cmd ${ns_r2} ip route add ${dummy0_a} via ${prefix4}.${a_r2}.1 + run_cmd ${ns_r1} ip route add ${dummy0_b} via ${prefix4}.${b_r1}.1 + run_cmd ${ns_r2} ip route add ${dummy0_b} via ${prefix4}.${b_r2}.1 + + + #Ping and expect two nexthop exceptions for two routes in nh group + run_cmd ${ns_a} ping -q -M want -i 0.1 -c 2 -s 1800 "${dummy0_b}" + + #Do route lookup before checking cached exceptions + run_cmd ${ns_a} ip route get ${dummy0_b} oif veth_A-R1 + run_cmd ${ns_a} ip route get ${dummy0_b} oif veth_A-R2 + + #Check cached exceptions + echo "$(ip -oneline route list cache)" + if [ "$(${ns_a} ip -oneline route list cache| grep mtu | wc -l)" -ne 2 ]; then + err " there are not enough cached exceptions" + fail=1 + fi + + return ${fail} +} + usage() { echo echo "$0 [OPTIONS] [TEST]..." base-commit: 66600fac7a984dea4ae095411f644770b2561ede -- 2.43.5

8 months

1
0
0 0

[PATCH v3 0/3] rust: kunit: Support KUnit tests with a user-space like syntax

by David Gow

This series was originally written by José Expósito, and has been modified and updated by Matt Gilbride and myself. The original version can be found here: https://github.com/Rust-for-Linux/linux/pull/950 Add support for writing KUnit tests in Rust. While Rust doctests are already converted to KUnit tests and run, they're really better suited for examples, rather than as first-class unit tests. This series implements a series of direct Rust bindings for KUnit tests, as well as a new macro which allows KUnit tests to be written using a close variant of normal Rust unit test syntax. The only change required is replacing '#[cfg(test)]' with '#[kunit_tests(kunit_test_suite_name)]' An example test would look like: #[kunit_tests(rust_kernel_hid_driver)] mod tests { use super::*; use crate::{c_str, driver, hid, prelude::*}; use core::ptr; struct SimpleTestDriver; impl Driver for SimpleTestDriver { type Data = (); } #[test] fn rust_test_hid_driver_adapter() { let mut hid = bindings::hid_driver::default(); let name = c_str!("SimpleTestDriver"); static MODULE: ThisModule = unsafe { ThisModule::from_ptr(ptr::null_mut()) }; let res = unsafe { <hid::Adapter<SimpleTestDriver> as driver::DriverOps>::register(&mut hid, name, &MODULE) }; assert_eq!(res, Err(ENODEV)); // The mock returns -19 } } Please give this a go, and make sure I haven't broken it! There's almost certainly a lot of improvements which can be made -- and there's a fair case to be made for replacing some of this with generated C code which can use the C macros -- but this is hopefully an adequate implementation for now, and the interface can (with luck) remain the same even if the implementation changes. A few small notable missing features: - Attributes (like the speed of a test) are hardcoded to the default value. - Similarly, the module name attribute is hardcoded to NULL. In C, we use the KBUILD_MODNAME macro, but I couldn't find a way to use this from Rust which wasn't more ugly than just disabling it. - Assertions are not automatically rewritten to use KUnit assertions. --- Changes since v2: https://lore.kernel.org/linux-kselftest/20241029092422.2884505-1-davidgow@g… - Include missing rust/macros/kunit.rs file from v2. (Thanks Boqun!) - The kunit_unsafe_test_suite!() macro will truncate the name of the suite if it is too long. (Thanks Alice!) - The proc macro now emits an error if the suite name is too long. - We no longer needlessly use UnsafeCell<> in kunit_unsafe_test_suite!(). (Thanks Alice!) Changes since v1: https://lore.kernel.org/lkml/20230720-rustbind-v1-0-c80db349e3b5@google.com… - Rebase on top of the latest rust-next (commit 718c4069896c) - Make kunit_case a const fn, rather than a macro (Thanks Boqun) - As a result, the null terminator is now created with kernel::kunit::kunit_case_null() - Use the C kunit_get_current_test() function to implement in_kunit_test(), rather than re-implementing it (less efficiently) ourselves. Changes since the GitHub PR: - Rebased on top of kselftest/kunit - Add const_mut_refs feature This may conflict with https://lore.kernel.org/lkml/20230503090708.2524310-6-nmi@metaspace.dk/ - Add rust/macros/kunit.rs to the KUnit MAINTAINERS entry --- José Expósito (3): rust: kunit: add KUnit case and suite macros rust: macros: add macro to easily run KUnit tests rust: kunit: allow to know if we are in a test MAINTAINERS | 1 + rust/kernel/kunit.rs | 191 +++++++++++++++++++++++++++++++++++++++++++ rust/kernel/lib.rs | 1 + rust/macros/kunit.rs | 153 ++++++++++++++++++++++++++++++++++ rust/macros/lib.rs | 29 +++++++ 5 files changed, 375 insertions(+) create mode 100644 rust/macros/kunit.rs -- 2.47.0.163.g1226f6d8fa-goog

8 months

2
6
0 0

[PATCH net-next] selftests: netdevsim: add fib_notifications to Makefile

by Jakub Kicinski

Commit 19d36d2971e6 ("selftests: netdevsim: Add fib_notifications test") added the test but didn't include it in the Makefile. Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> --- CC: andrew+netdev(a)lunn.ch CC: shuah(a)kernel.org CC: linux-kselftest(a)vger.kernel.org CC: petrm(a)nvidia.com --- tools/testing/selftests/drivers/net/netdevsim/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/drivers/net/netdevsim/Makefile b/tools/testing/selftests/drivers/net/netdevsim/Makefile index 5bace0b7fb57..cc08b220323f 100644 --- a/tools/testing/selftests/drivers/net/netdevsim/Makefile +++ b/tools/testing/selftests/drivers/net/netdevsim/Makefile @@ -8,6 +8,7 @@ TEST_PROGS = devlink.sh \ ethtool-pause.sh \ ethtool-ring.sh \ fib.sh \ + fib_notifications.sh \ hw_stats_l3.sh \ nexthop.sh \ peer.sh \ -- 2.47.0

8 months

3
2
0 0

[PATCH v3] selftests/net: Fix ./ns-XXXXXX not cleanup

by Li Zhijian

``` readonly STATS="$(mktemp -p /tmp ns-XXXXXX)" readonly BASE=`basename $STATS` ``` It could be a mistake to write to $BASE rather than $STATS, where $STATS is used to save the NSTAT_HISTORY and it will be cleaned up before exit. Although since we've been creating the wrong file this whole time and everything worked, it's fine to remove these 2 lines completely Cc: "David S. Miller" <davem(a)davemloft.net> Cc: Eric Dumazet <edumazet(a)google.com> Cc: Jakub Kicinski <kuba(a)kernel.org> Cc: Paolo Abeni <pabeni(a)redhat.com> Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> --- Cc: netdev(a)vger.kernel.org --- V3: Remove these 2 lines rather than fixing the filename --- Hello, Cover letter is here. This patch set aims to make 'git status' clear after 'make' and 'make run_tests' for kselftests. --- V2: nothing change Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> --- tools/testing/selftests/net/veth.sh | 2 -- 1 file changed, 2 deletions(-) diff --git a/tools/testing/selftests/net/veth.sh b/tools/testing/selftests/net/veth.sh index 4f1edbafb946..6bb7dfaa30b6 100755 --- a/tools/testing/selftests/net/veth.sh +++ b/tools/testing/selftests/net/veth.sh @@ -46,8 +46,6 @@ create_ns() { ip -n $BASE$ns addr add dev veth$ns $BM_NET_V4$ns/24 ip -n $BASE$ns addr add dev veth$ns $BM_NET_V6$ns/64 nodad done - echo "#kernel" > $BASE - chmod go-rw $BASE } __chk_flag() { -- 2.44.0

8 months

2
1
0 0

[PATCH net-next v8 00/24] Introducing OpenVPN Data Channel Offload

by Antonio Quartulli

This is the 8th version of the ovpn patchset. Thanks Sergey for arguing regarding splitting PEER_SET into SET and NEW. I decided to follow this suggestion as it makes the API and its return value easier to work with. Thanks Donald for the suggestions regarding the NL API - they have all been implemented (unless I forgot some, but hopefully I did not). Notable changes from v7: * Netlink API adjustments: ** renamed NL API from OP_OBJ to OBJ_OP (i.e. from SET_PEER to PEER_SET) ** split PEER_SET from PEER_NEW for better clarity in case of error ** renamed NL API from NEW/DEL_IFACE to DEV_NEW/DEL ** converted all underscores to dashes in YML NL spec ** split sockaddr_remote attr into ipv4/6, port and v6_scope_id attrs ** split local_ip attr into local_ipv4 and local_ipv6 attrs ** turned keyconf into a root attribute (it was nested in peer before) ** made key_swap use a keyconf object rather than a peer for consistency with key mgmt API ** created specific op for peer_del notification (peer_del_ntf) ** created specific op for key_swap notification (key_swap_ntf) ** allow user to update VPN IPv4/6 (peer is now rehashable) ** converted port attrs from u32 to u16 for better consistency with userspace code * added rtnl_ops .dellink implementation * removed patch 2 as it's not needed anymore thanks to the point above * moved rtnl_ops .kind initialization to first patch * updated MAINTAINERS file with Github tree and selftest folder * wrapped long lines in selftest scripts BONUS: used b4 for the first time to prepare the patchset and send it Please note that patches previously reviewed by Andrew Lunn have retained the Reviewed-by tag as they have been simply rebased without any modification. The latest code can also be found at: https://github.com/OpenVPN/linux-kernel-ovpn Thanks a lot! Best Regards, Antonio Quartulli OpenVPN Inc. --- Antonio Quartulli (24): netlink: add NLA_POLICY_MAX_LEN macro net: introduce OpenVPN Data Channel Offload (ovpn) ovpn: add basic netlink support ovpn: add basic interface creation/destruction/management routines ovpn: implement interface creation/destruction via netlink ovpn: keep carrier always on ovpn: introduce the ovpn_peer object ovpn: introduce the ovpn_socket object ovpn: implement basic TX path (UDP) ovpn: implement basic RX path (UDP) ovpn: implement packet processing ovpn: store tunnel and transport statistics ovpn: implement TCP transport ovpn: implement multi-peer support ovpn: implement peer lookup logic ovpn: implement keepalive mechanism ovpn: add support for updating local UDP endpoint ovpn: add support for peer floating ovpn: implement peer add/dump/delete via netlink ovpn: implement key add/del/swap via netlink ovpn: kill key and notify userspace in case of IV exhaustion ovpn: notify userspace when a peer is deleted ovpn: add basic ethtool support testing/selftest: add test tool and scripts for ovpn module Documentation/netlink/specs/ovpn.yaml | 387 +++++ MAINTAINERS | 11 + drivers/net/Kconfig | 15 + drivers/net/Makefile | 1 + drivers/net/ovpn/Makefile | 22 + drivers/net/ovpn/bind.c | 54 + drivers/net/ovpn/bind.h | 117 ++ drivers/net/ovpn/crypto.c | 172 ++ drivers/net/ovpn/crypto.h | 138 ++ drivers/net/ovpn/crypto_aead.c | 356 ++++ drivers/net/ovpn/crypto_aead.h | 31 + drivers/net/ovpn/io.c | 459 ++++++ drivers/net/ovpn/io.h | 25 + drivers/net/ovpn/main.c | 363 ++++ drivers/net/ovpn/main.h | 29 + drivers/net/ovpn/netlink-gen.c | 224 +++ drivers/net/ovpn/netlink-gen.h | 42 + drivers/net/ovpn/netlink.c | 1099 +++++++++++++ drivers/net/ovpn/netlink.h | 18 + drivers/net/ovpn/ovpnstruct.h | 60 + drivers/net/ovpn/packet.h | 40 + drivers/net/ovpn/peer.c | 1207 ++++++++++++++ drivers/net/ovpn/peer.h | 172 ++ drivers/net/ovpn/pktid.c | 130 ++ drivers/net/ovpn/pktid.h | 87 + drivers/net/ovpn/proto.h | 104 ++ drivers/net/ovpn/skb.h | 61 + drivers/net/ovpn/socket.c | 165 ++ drivers/net/ovpn/socket.h | 53 + drivers/net/ovpn/stats.c | 21 + drivers/net/ovpn/stats.h | 47 + drivers/net/ovpn/tcp.c | 506 ++++++ drivers/net/ovpn/tcp.h | 43 + drivers/net/ovpn/udp.c | 406 +++++ drivers/net/ovpn/udp.h | 26 + include/net/netlink.h | 1 + include/uapi/linux/ovpn.h | 116 ++ include/uapi/linux/udp.h | 1 + tools/net/ynl/ynl-gen-c.py | 2 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/net/ovpn/.gitignore | 2 + tools/testing/selftests/net/ovpn/Makefile | 18 + tools/testing/selftests/net/ovpn/config | 8 + tools/testing/selftests/net/ovpn/data-test-tcp.sh | 9 + tools/testing/selftests/net/ovpn/data-test.sh | 153 ++ tools/testing/selftests/net/ovpn/data64.key | 5 + tools/testing/selftests/net/ovpn/float-test.sh | 118 ++ tools/testing/selftests/net/ovpn/ovpn-cli.c | 1822 +++++++++++++++++++++ tools/testing/selftests/net/ovpn/tcp_peers.txt | 5 + tools/testing/selftests/net/ovpn/udp_peers.txt | 5 + 50 files changed, 8957 insertions(+) --- base-commit: 44badc908f2c85711cb18e45e13119c10ad3a05f change-id: 20241002-b4-ovpn-eeee35c694a2 Best regards, -- Antonio Quartulli <antonio(a)openvpn.net>

8 months

7
44
0 0

[PATCH -next] KVM: selftests: Use ARRAY_SIZE for array length

by Jiapeng Chong

Use of macro ARRAY_SIZE to calculate array size minimizes the redundant code and improves code reusability. ./tools/testing/selftests/kvm/x86_64/debug_regs.c:169:32-33: WARNING: Use ARRAY_SIZE. Reported-by: Abaci Robot <abaci(a)linux.alibaba.com> Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=10847 Signed-off-by: Jiapeng Chong <jiapeng.chong(a)linux.alibaba.com> --- tools/testing/selftests/kvm/x86_64/debug_regs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/x86_64/debug_regs.c b/tools/testing/selftests/kvm/x86_64/debug_regs.c index 76cc2df9238a..2d814c1d1dc4 100644 --- a/tools/testing/selftests/kvm/x86_64/debug_regs.c +++ b/tools/testing/selftests/kvm/x86_64/debug_regs.c @@ -166,7 +166,7 @@ int main(void) /* Test single step */ target_rip = CAST_TO_RIP(ss_start); target_dr6 = 0xffff4ff0ULL; - for (i = 0; i < (sizeof(ss_size) / sizeof(ss_size[0])); i++) { + for (i = 0; i < ARRAY_SIZE(ss_size); i++) { target_rip += ss_size[i]; memset(&debug, 0, sizeof(debug)); debug.control = KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP | -- 2.32.0.3.g01195cf9f

8 months

2
1
0 0

[PATCH] hardware_disable_test: remove unused macro

by Ba Jing

The macro GUEST_CODE_PIO_PORT is never referenced in the code, just remove it. Signed-off-by: Ba Jing <bajing(a)cmss.chinamobile.com> --- tools/testing/selftests/kvm/hardware_disable_test.c | 1 - 1 file changed, 1 deletion(-) diff --git a/tools/testing/selftests/kvm/hardware_disable_test.c b/tools/testing/selftests/kvm/hardware_disable_test.c index bce73bcb973c..94bd6ed24cf3 100644 --- a/tools/testing/selftests/kvm/hardware_disable_test.c +++ b/tools/testing/selftests/kvm/hardware_disable_test.c @@ -20,7 +20,6 @@ #define SLEEPING_THREAD_NUM (1 << 4) #define FORK_NUM (1ULL << 9) #define DELAY_US_MAX 2000 -#define GUEST_CODE_PIO_PORT 4 sem_t *sem; -- 2.33.0

8 months

2
1
0 0

[PATCH net-next v6 00/12] selftests: ncdevmem: Add ncdevmem to ksft

by Stanislav Fomichev

The goal of the series is to simplify and make it possible to use ncdevmem in an automated way from the ksft python wrapper. ncdevmem is slowly mutated into a state where it uses stdout to print the payload and the python wrapper is added to make sure the arrived payload matches the expected one. v6: - fix compilation issue in 'Unify error handling' patch (Jakub) v5: - properly handle errors from inet_pton() and socket() (Paolo) - remove unneeded import from python selftest (Paolo) v4: - keep usage example with validation (Mina) - fix compilation issue in one patch (s/start_queues/start_queue/) v3: - keep and refine the comment about ncdevmem invocation (Mina) - add the comment about not enforcing exit status for ntuple reset (Mina) - make configure_headersplit more robust (Mina) - use num_queues/2 in selftest and let the users override it (Mina) - remove memory_provider.memcpy_to_device (Mina) - keep ksft as is (don't use -v validate flags): we are gonna need a --debug-disable flag to make it less chatty; otherwise it times out when sending too much data; so leaving it as a separate follow up v2: - don't remove validation (Mina) - keep 5-tuple flow steering but use it only when -c is provided (Mina) - remove separate flag for probing (Mina) - move ncdevmem under drivers/net/hw, not drivers/net (Jakub) Cc: Mina Almasry <almasrymina(a)google.com> Stanislav Fomichev (12): selftests: ncdevmem: Redirect all non-payload output to stderr selftests: ncdevmem: Separate out dmabuf provider selftests: ncdevmem: Unify error handling selftests: ncdevmem: Make client_ip optional selftests: ncdevmem: Remove default arguments selftests: ncdevmem: Switch to AF_INET6 selftests: ncdevmem: Properly reset flow steering selftests: ncdevmem: Use YNL to enable TCP header split selftests: ncdevmem: Remove hard-coded queue numbers selftests: ncdevmem: Run selftest when none of the -s or -c has been provided selftests: ncdevmem: Move ncdevmem under drivers/net/hw selftests: ncdevmem: Add automated test .../selftests/drivers/net/hw/.gitignore | 1 + .../testing/selftests/drivers/net/hw/Makefile | 9 + .../selftests/drivers/net/hw/devmem.py | 45 + .../selftests/drivers/net/hw/ncdevmem.c | 773 ++++++++++++++++++ tools/testing/selftests/net/.gitignore | 1 - tools/testing/selftests/net/Makefile | 8 - tools/testing/selftests/net/ncdevmem.c | 570 ------------- 7 files changed, 828 insertions(+), 579 deletions(-) create mode 100644 tools/testing/selftests/drivers/net/hw/.gitignore create mode 100755 tools/testing/selftests/drivers/net/hw/devmem.py create mode 100644 tools/testing/selftests/drivers/net/hw/ncdevmem.c delete mode 100644 tools/testing/selftests/net/ncdevmem.c -- 2.47.0

8 months

3
19
0 0

[PATCH v2 0/9] arm64: Support 2024 dpISA extensions

by Mark Brown

The 2024 architecture release includes a number of data processing extensions, mostly SVE and SME additions with a few others. These are all very straightforward extensions which add instructions but no architectural state so only need hwcaps and exposing of the ID registers to KVM guests and userspace. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v2: - Filter KVM guest visible bitfields in ID_AA64ISAR3_EL1 to only those we make writeable. - Link to v1: https://lore.kernel.org/r/20241028-arm64-2024-dpisa-v1-0-a38d08b008a8@kerne… --- Mark Brown (9): arm64/sysreg: Update ID_AA64PFR2_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64ISAR3_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64FPFR0_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64ZFR0_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64SMFR0_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64ISAR2_EL1 to DDI0601 2024-09 arm64/hwcap: Describe 2024 dpISA extensions to userspace KVM: arm64: Allow control of dpISA extensions in ID_AA64ISAR3_EL1 kselftest/arm64: Add 2024 dpISA extensions to hwcap test Documentation/arch/arm64/elf_hwcaps.rst | 51 ++++++ arch/arm64/include/asm/hwcap.h | 17 ++ arch/arm64/include/uapi/asm/hwcap.h | 17 ++ arch/arm64/kernel/cpufeature.c | 35 ++++ arch/arm64/kernel/cpuinfo.c | 17 ++ arch/arm64/kvm/sys_regs.c | 6 +- arch/arm64/tools/sysreg | 87 +++++++++- tools/testing/selftests/arm64/abi/hwcap.c | 273 +++++++++++++++++++++++++++++- 8 files changed, 493 insertions(+), 10 deletions(-) --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241008-arm64-2024-dpisa-8091074a7f48 Best regards, -- Mark Brown <broonie(a)kernel.org>

8 months

2
10
0 0

[PATCH v4 0/3] bpf: Using binary search to improve the performance of btf_find_by_name_kind

by Donglin Peng

Currently, we are only using the linear search method to find the type id by the name, which has a time complexity of O(n). This change involves sorting the names of btf types in ascending order and using binary search, which has a time complexity of O(log(n)). This idea was inspired by the following patch: 60443c88f3a8 ("kallsyms: Improve the performance of kallsyms_lookup_name()"). At present, this improvement is only for searching in vmlinux's and module's BTFs. Another change is the search direction, where we search the BTF first and then its base, the type id of the first matched btf_type will be returned. Here is a time-consuming result that finding 87590 type ids by their names in vmlinux's BTF. Before: 158426 ms After: 114 ms The average lookup performance has improved more than 1000x in the above scenario. v4: - Divide the patch into two parts: kernel and libbpf - Use Eduard's code to sort btf_types in the btf__dedup function - Correct some btf testcases due to modifications of the order of btf_types. v3: - Link: https://lore.kernel.org/all/20240608140835.965949-1-dolinux.peng@gmail.com/ - Sort btf_types during build process other than during boot, to reduce the overhead of memory and boot time. v2: - Link: https://lore.kernel.org/all/20230909091646.420163-1-pengdonglin@sangfor.com… Donglin Peng (3): libbpf: Sort btf_types in ascending order by name bpf: Using binary search to improve the performance of btf_find_by_name_kind libbpf: Using binary search to improve the performance of btf__find_by_name_kind include/linux/btf.h | 1 + kernel/bpf/btf.c | 157 +++++++++- tools/lib/bpf/btf.c | 274 +++++++++++++--- tools/testing/selftests/bpf/prog_tests/btf.c | 296 +++++++++--------- .../bpf/prog_tests/btf_dedup_split.c | 64 ++-- 5 files changed, 555 insertions(+), 237 deletions(-) -- 2.34.1

8 months

2
12
0 0

[PATCH v3 0/4] vfio-pci support pasid attach/detach

by Yi Liu

This adds the pasid attach/detach uAPIs for userspace to attach/detach a PASID of a device to/from a given ioas/hwpt. Only vfio-pci driver is enabled in this series. After this series, PASID-capable devices bound with vfio-pci can report PASID capability to userspace and VM to enable PASID usages like Shared Virtual Addressing (SVA). Based on the discussion about reporting the vPASID to VM [1], it's agreed that we will let the userspace VMM to synthesize the vPASID capability. The VMM needs to figure out a hole to put the vPASID cap. This includes the hidden bits handling for some devices. While, it's up to the userspace, it's not the focus of this series. This series first adds the helpers for pasid attach in vfio core and then adds the device cdev ioctls for pasid attach/detach. In the end of this series, the IOMMU_GET_HW_INFO ioctl is extended to report the PCI PASID capability to the userspace. Userspace should check this before using any PASID related uAPIs provided by VFIO, which is the agreement in [2]. This series depends on the iommufd pasid attach/detach series [3]. The completed code can be found at [4], tested with a hacky Qemu branch [5]. [1] https://lore.kernel.org/kvm/BN9PR11MB5276318969A212AD0649C7BE8CBE2@BN9PR11M… [2] https://lore.kernel.org/kvm/4f2daf50-a5ad-4599-ab59-bcfc008688d8@intel.com/ [3] https://lore.kernel.org/linux-iommu/20240912131255.13305-1-yi.l.liu@intel.c… [4] https://github.com/yiliu1765/iommufd/tree/iommufd_pasid [5] https://github.com/yiliu1765/qemu/tree/wip/zhenzhong/iommufd_nesting_rfcv2-… Change log: v3: - Misc enhancement on patch 01 of v2 (Alex, Jason) - Add Jason's r-b to patch 03 of v2 - Drop the logic that report PASID via VFIO_DEVICE_FEATURE ioctl - Extend IOMMU_GET_HW_INFO to report PASID support (Kevin, Jason, Alex) v2: https://lore.kernel.org/kvm/20240412082121.33382-1-yi.l.liu@intel.com/ - Use IDA to track if PASID is attached or not in VFIO. (Jason) - Fix the issue of calling pasid_at[de]tach_ioas callback unconditionally (Alex) - Fix the wrong data copy in vfio_df_ioctl_pasid_detach_pt() (Zhenzhong) - Minor tweaks in comments (Kevin) v1: https://lore.kernel.org/kvm/20231127063909.129153-1-yi.l.liu@intel.com/ - Report PASID capability via VFIO_DEVICE_FEATURE (Alex) rfc: https://lore.kernel.org/linux-iommu/20230926093121.18676-1-yi.l.liu@intel.c… Regards, Yi Liu Yi Liu (4): ida: Add ida_find_first_range() vfio-iommufd: Support pasid [at|de]tach for physical VFIO devices vfio: Add VFIO_DEVICE_PASID_[AT|DE]TACH_IOMMUFD_PT iommufd: Extend IOMMU_GET_HW_INFO to report PASID capability drivers/iommu/iommufd/device.c | 27 +++++++++++++- drivers/pci/ats.c | 32 ++++++++++++++++ drivers/vfio/device_cdev.c | 51 ++++++++++++++++++++++++++ drivers/vfio/iommufd.c | 50 +++++++++++++++++++++++++ drivers/vfio/pci/vfio_pci.c | 2 + drivers/vfio/vfio.h | 4 ++ drivers/vfio/vfio_main.c | 8 ++++ include/linux/idr.h | 11 ++++++ include/linux/pci-ats.h | 3 ++ include/linux/vfio.h | 11 ++++++ include/uapi/linux/iommufd.h | 14 ++++++- include/uapi/linux/vfio.h | 55 ++++++++++++++++++++++++++++ lib/idr.c | 67 ++++++++++++++++++++++++++++++++++ 13 files changed, 333 insertions(+), 2 deletions(-) -- 2.34.1

8 months

7
29
0 0

[PATCH net-next v6 0/3] Threads support in proc connector

by Anjali Kulkarni

Recently we committed a fix to allow processes to receive notifications for non-zero exits via the process connector module. Commit is a4c9a56e6a2c. However, for threads, when it does a pthread_exit(&exit_status) call, the kernel is not aware of the exit status with which pthread_exit is called. It is sent by child thread to the parent process, if it is waiting in pthread_join(). Hence, for a thread exiting abnormally, kernel cannot send notifications to any listening processes. The exception to this is if the thread is sent a signal which it has not handled, and dies along with it's process as a result; for eg. SIGSEGV or SIGKILL. In this case, kernel is aware of the non-zero exit and sends a notification for it. For our use case, we cannot have parent wait in pthread_join, one of the main reasons for this being that we do not want to track normal pthread_exit(), which could be a very large number. We only want to be notified of any abnormal exits. Hence, threads are created with pthread_attr_t set to PTHREAD_CREATE_DETACHED. To fix this problem, we add a new type PROC_CN_MCAST_NOTIFY to proc connector API, which allows a thread to send it's exit status to kernel either when it needs to call pthread_exit() with non-zero value to indicate some error or from signal handler before pthread_exit(). v5->v6 changes: - As suggested by Simon Horman, fixed style issues (some old) by running ./scripts/checkpatch.pl --strict --max-line-length=80 - Removed inline functions as suggested by Simon Horman - Added "depends on" in Kconfig.debug as suggested by Stanislav Fomichev - Removed warning while compilation with kernel space headers as suggested by Simon Horman - Removed "comm" field, will send separate patch for this. - Added kunit configs in tools/testing/kunit/configs/all_tests.config with it's dependencies. v4->v5 changes: - Handled comment by Stanislav Fomichev to fix a print format error. - Made thread.c completely automated by starting proc_filter program from within threads.c. - Changed name CONFIG_CN_HASH_KUNIT_TEST to CN_HASH_KUNIT_TEST in Kconfig.debug and changed display text. v3->v4 changes: - Reduce size of exit.log by removing unnecessary text. v2->v3 changes: - Handled comment by Liam Howlett to set hdev to NULL and add comment on it. - Handled comment by Liam Howlett to combine functions for deleting+get and deleting into one in cn_hash.c - Handled comment by Liam Howlett to remove extern in the functions defined in cn_hash_test.h - Some nits by Liam Howlett fixed. - Handled comment by Liam Howlett to make threads test automated. proc_filter.c creates exit.log, which is read by thread.c and checks the values reported. - Added "comm" field to struct proc_event, to copy the task's name to the packet to allow further filtering by packets. v1->v2 changes: - Handled comment by Peter Zijlstra to remove locking for PF_EXIT_NOTIFY task->flags. - Added error handling in thread.c v->v1 changes: - Handled comment by Simon Horman to remove unused err in cn_proc.c - Handled comment by Simon Horman to make adata and key_display static in cn_hash_test.c Anjali Kulkarni (3): connector/cn_proc: Add hash table for threads connector/cn_proc: Kunit tests for threads hash table connector/cn_proc: Selftest for threads drivers/connector/Makefile | 2 +- drivers/connector/cn_hash.c | 216 ++++++++++++++++ drivers/connector/cn_proc.c | 81 ++++-- drivers/connector/connector.c | 88 ++++++- include/linux/connector.h | 62 ++++- include/linux/sched.h | 2 +- include/uapi/linux/cn_proc.h | 4 +- lib/Kconfig.debug | 19 ++ lib/Makefile | 1 + lib/cn_hash_test.c | 169 +++++++++++++ lib/cn_hash_test.h | 10 + tools/testing/kunit/configs/all_tests.config | 5 + tools/testing/selftests/connector/Makefile | 25 ++ .../testing/selftests/connector/proc_filter.c | 63 +++-- tools/testing/selftests/connector/thread.c | 238 ++++++++++++++++++ .../selftests/connector/thread_filter.c | 96 +++++++ 16 files changed, 1027 insertions(+), 54 deletions(-) create mode 100644 drivers/connector/cn_hash.c create mode 100644 lib/cn_hash_test.c create mode 100644 lib/cn_hash_test.h create mode 100644 tools/testing/selftests/connector/thread.c create mode 100644 tools/testing/selftests/connector/thread_filter.c -- 2.46.0

8 months

2
4
0 0

[PATCH RFT v11 0/8] fork: Support shadow stacks in clone3()

by Mark Brown

The kernel has recently added support for shadow stacks, currently x86 only using their CET feature but both arm64 and RISC-V have equivalent features (GCS and Zicfiss respectively), I am actively working on GCS[1]. With shadow stacks the hardware maintains an additional stack containing only the return addresses for branch instructions which is not generally writeable by userspace and ensures that any returns are to the recorded addresses. This provides some protection against ROP attacks and making it easier to collect call stacks. These shadow stacks are allocated in the address space of the userspace process. Our API for shadow stacks does not currently offer userspace any flexiblity for managing the allocation of shadow stacks for newly created threads, instead the kernel allocates a new shadow stack with the same size as the normal stack whenever a thread is created with the feature enabled. The stacks allocated in this way are freed by the kernel when the thread exits or shadow stacks are disabled for the thread. This lack of flexibility and control isn't ideal, in the vast majority of cases the shadow stack will be over allocated and the implicit allocation and deallocation is not consistent with other interfaces. As far as I can tell the interface is done in this manner mainly because the shadow stack patches were in development since before clone3() was implemented. Since clone3() is readily extensible let's add support for specifying a shadow stack when creating a new thread or process, keeping the current implicit allocation behaviour if one is not specified either with clone3() or through the use of clone(). The user must provide a shadow stack pointer, this must point to memory mapped for use as a shadow stackby map_shadow_stack() with an architecture specified shadow stack token at the top of the stack. Please note that the x86 portions of this code are build tested only, I don't appear to have a system that can run CET available to me. [1] https://lore.kernel.org/linux-arm-kernel/20241001-arm64-gcs-v13-0-222b78d87… Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v11: - Rebase onto arm64 for-next/gcs, which is based on v6.12-rc1, and integrate arm64 support. - Rework the interface to specify a shadow stack pointer rather than a base and size like we do for the regular stack. - Link to v10: https://lore.kernel.org/r/20240821-clone3-shadow-stack-v10-0-06e8797b9445@k… Changes in v10: - Integrate fixes & improvements for the x86 implementation from Rick Edgecombe. - Require that the shadow stack be VM_WRITE. - Require that the shadow stack base and size be sizeof(void *) aligned. - Clean up trailing newline. - Link to v9: https://lore.kernel.org/r/20240819-clone3-shadow-stack-v9-0-962d74f99464@ke… Changes in v9: - Pull token validation earlier and report problems with an error return to parent rather than signal delivery to the child. - Verify that the top of the supplied shadow stack is VM_SHADOW_STACK. - Rework token validation to only do the page mapping once. - Drop no longer needed support for testing for signals in selftest. - Fix typo in comments. - Link to v8: https://lore.kernel.org/r/20240808-clone3-shadow-stack-v8-0-0acf37caf14c@ke… Changes in v8: - Fix token verification with user specified shadow stack. - Don't track user managed shadow stacks for child processes. - Link to v7: https://lore.kernel.org/r/20240731-clone3-shadow-stack-v7-0-a9532eebfb1d@ke… Changes in v7: - Rebase onto v6.11-rc1. - Typo fixes. - Link to v6: https://lore.kernel.org/r/20240623-clone3-shadow-stack-v6-0-9ee7783b1fb9@ke… Changes in v6: - Rebase onto v6.10-rc3. - Ensure we don't try to free the parent shadow stack in error paths of x86 arch code. - Spelling fixes in userspace API document. - Additional cleanups and improvements to the clone3() tests to support the shadow stack tests. - Link to v5: https://lore.kernel.org/r/20240203-clone3-shadow-stack-v5-0-322c69598e4b@ke… Changes in v5: - Rebase onto v6.8-rc2. - Rework ABI to have the user allocate the shadow stack memory with map_shadow_stack() and a token. - Force inlining of the x86 shadow stack enablement. - Move shadow stack enablement out into a shared header for reuse by other tests. - Link to v4: https://lore.kernel.org/r/20231128-clone3-shadow-stack-v4-0-8b28ffe4f676@ke… Changes in v4: - Formatting changes. - Use a define for minimum shadow stack size and move some basic validation to fork.c. - Link to v3: https://lore.kernel.org/r/20231120-clone3-shadow-stack-v3-0-a7b8ed3e2acc@ke… Changes in v3: - Rebase onto v6.7-rc2. - Remove stale shadow_stack in internal kargs. - If a shadow stack is specified unconditionally use it regardless of CLONE_ parameters. - Force enable shadow stacks in the selftest. - Update changelogs for RISC-V feature rename. - Link to v2: https://lore.kernel.org/r/20231114-clone3-shadow-stack-v2-0-b613f8681155@ke… Changes in v2: - Rebase onto v6.7-rc1. - Remove ability to provide preallocated shadow stack, just specify the desired size. - Link to v1: https://lore.kernel.org/r/20231023-clone3-shadow-stack-v1-0-d867d0b5d4d0@ke… --- Mark Brown (8): arm64/gcs: Return a success value from gcs_alloc_thread_stack() Documentation: userspace-api: Add shadow stack API documentation selftests: Provide helper header for shadow stack testing fork: Add shadow stack support to clone3() selftests/clone3: Remove redundant flushes of output streams selftests/clone3: Factor more of main loop into test_clone3() selftests/clone3: Allow tests to flag if -E2BIG is a valid error code selftests/clone3: Test shadow stack support Documentation/userspace-api/index.rst | 1 + Documentation/userspace-api/shadow_stack.rst | 41 ++++ arch/arm64/include/asm/gcs.h | 8 +- arch/arm64/kernel/process.c | 8 +- arch/arm64/mm/gcs.c | 62 +++++- arch/x86/include/asm/shstk.h | 11 +- arch/x86/kernel/process.c | 2 +- arch/x86/kernel/shstk.c | 57 +++++- include/asm-generic/cacheflush.h | 11 ++ include/linux/sched/task.h | 17 ++ include/uapi/linux/sched.h | 10 +- kernel/fork.c | 96 +++++++-- tools/testing/selftests/clone3/clone3.c | 226 ++++++++++++++++++---- tools/testing/selftests/clone3/clone3_selftests.h | 65 ++++++- tools/testing/selftests/ksft_shstk.h | 98 ++++++++++ 15 files changed, 632 insertions(+), 81 deletions(-) --- base-commit: d17cd7b7cc92d37ee8b2df8f975fc859a261f4dc change-id: 20231019-clone3-shadow-stack-15d40d2bf536 Best regards, -- Mark Brown <broonie(a)kernel.org>

8 months

3
12
0 0

[PATCH bpf-next] selftests/bpf: Fix compile error when MPTCP not support

by Tao Chen

Fix compile error when MPTCP feature not support, though eBPF core check already done which seems invalid in this situation, the error info like: progs/mptcp_sock.c:49:40: error: no member named 'is_mptcp' in 'struct tcp_sock' 49 | is_mptcp = bpf_core_field_exists(tsk->is_mptcp) ? The filed created in new definitions with eBPF core feature to solve this build problem, and test case result still ok in MPTCP kernel. 176/1 mptcp/base:OK 176/2 mptcp/mptcpify:OK 176 mptcp:OK Summary: 1/2 PASSED, 0 SKIPPED, 0 FAILED Fixes: 8039d353217c ("selftests/bpf: Add MPTCP test base") Signed-off-by: Tao Chen <chen.dylane(a)gmail.com> --- .../testing/selftests/bpf/progs/mptcp_sock.c | 42 ++++++++++++++----- 1 file changed, 32 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/bpf/progs/mptcp_sock.c b/tools/testing/selftests/bpf/progs/mptcp_sock.c index f3acb90588c7..2f80d042686a 100644 --- a/tools/testing/selftests/bpf/progs/mptcp_sock.c +++ b/tools/testing/selftests/bpf/progs/mptcp_sock.c @@ -25,13 +25,23 @@ struct { __type(value, struct mptcp_storage); } socket_storage_map SEC(".maps"); +struct tcp_sock___new { + bool is_mptcp; +} __attribute__((preserve_access_index)); + +struct mptcp_sock___new { + __u32 token; + struct sock *first; + char ca_name[TCP_CA_NAME_MAX]; +} __attribute__((preserve_access_index)); + SEC("sockops") int _sockops(struct bpf_sock_ops *ctx) { struct mptcp_storage *storage; - struct mptcp_sock *msk; + struct mptcp_sock___new *msk; int op = (int)ctx->op; - struct tcp_sock *tsk; + struct tcp_sock___new *tsk; struct bpf_sock *sk; bool is_mptcp; @@ -42,11 +52,16 @@ int _sockops(struct bpf_sock_ops *ctx) if (!sk) return 1; - tsk = bpf_skc_to_tcp_sock(sk); + /* recast pointer to capture new type for compiler */ + tsk = (void *)bpf_skc_to_tcp_sock(sk); if (!tsk) return 1; - is_mptcp = bpf_core_field_exists(tsk->is_mptcp) ? tsk->is_mptcp : 0; + if (bpf_core_field_exists(tsk->is_mptcp)) + is_mptcp = BPF_CORE_READ(tsk, is_mptcp); + else + is_mptcp = 0; + if (!is_mptcp) { storage = bpf_sk_storage_get(&socket_storage_map, sk, 0, BPF_SK_STORAGE_GET_F_CREATE); @@ -57,7 +72,7 @@ int _sockops(struct bpf_sock_ops *ctx) __builtin_memset(storage->ca_name, 0, TCP_CA_NAME_MAX); storage->first = NULL; } else { - msk = bpf_skc_to_mptcp_sock(sk); + msk = (void *)bpf_skc_to_mptcp_sock(sk); if (!msk) return 1; @@ -66,9 +81,9 @@ int _sockops(struct bpf_sock_ops *ctx) if (!storage) return 1; - storage->token = msk->token; - __builtin_memcpy(storage->ca_name, msk->ca_name, TCP_CA_NAME_MAX); - storage->first = msk->first; + storage->token = BPF_CORE_READ(msk, token); + BPF_CORE_READ_STR_INTO(&storage->ca_name, msk, ca_name); + storage->first = BPF_CORE_READ(msk, first); } storage->invoked++; storage->is_mptcp = is_mptcp; @@ -81,8 +96,15 @@ SEC("fentry/mptcp_pm_new_connection") int BPF_PROG(trace_mptcp_pm_new_connection, struct mptcp_sock *msk, const struct sock *ssk, int server_side) { - if (!server_side) - token = msk->token; + struct mptcp_sock___new *mskw; + + if (!server_side) { + mskw = (void *)msk; + if (bpf_core_field_exists(mskw->token)) + token = BPF_CORE_READ(mskw, token); + else + token = 0; + } return 0; } -- 2.43.0

8 months

3
4
0 0

[PATCH 0/3] Tracefs gid mount option fixes

by Kalesh Singh

Hi all, This series is based on v6.12-rc4. It fixes an issue with the tracefs gid mount option. Adds test case to prevent future breakages and updates the tracefs readme to document the expected behavior of this option. Thanks, Kalesh Kalesh Singh (3): tracing: Document tracefs gid mount option tracing/selftests: Add tracefs mount options test tracing: Fix tracefs gid mount option fs/tracefs/inode.c | 12 ++- kernel/trace/trace.c | 4 + .../ftrace/test.d/00basic/mount_options.tc | 101 ++++++++++++++++++ .../ftrace/test.d/00basic/test_ownership.tc | 16 +-- .../testing/selftests/ftrace/test.d/functions | 25 +++++ 5 files changed, 142 insertions(+), 16 deletions(-) create mode 100644 tools/testing/selftests/ftrace/test.d/00basic/mount_options.tc base-commit: 42f7652d3eb527d03665b09edac47f85fb600924 -- 2.47.0.163.g1226f6d8fa-goog

8 months

3
9
0 0

[PATCH v2 0/3] Tracefs mount option fixes

by Kalesh Singh

Hi all, This is v2 of the series fixing the tracefs mount options. Changes in v2: - Update the commit descriptions, per Eric and Steve - Fix ordering of the patches, per Steve v1 can be found at: - https://lore.kernel.org/r/20241028214550.2099923-1-kaleshsingh@google.com/ Thanks, Kalesh Kalesh Singh (3): tracing: Fix tracefs mount options tracing: Document tracefs gid mount option tracing/selftests: Add tracefs mount options test fs/tracefs/inode.c | 12 ++- kernel/trace/trace.c | 4 + .../ftrace/test.d/00basic/mount_options.tc | 101 ++++++++++++++++++ .../ftrace/test.d/00basic/test_ownership.tc | 16 +-- .../testing/selftests/ftrace/test.d/functions | 25 +++++ 5 files changed, 142 insertions(+), 16 deletions(-) create mode 100644 tools/testing/selftests/ftrace/test.d/00basic/mount_options.tc base-commit: 42f7652d3eb527d03665b09edac47f85fb600924 -- 2.47.0.163.g1226f6d8fa-goog

8 months

1
3
0 0

[PATCH] selftests/lam: Test get_user() LAM pointer handling

by Maciej Wieczor-Retman

Recent change in how get_user() handles pointers [1] has a specific case for LAM. It assigns a different bitmask that's later used to check whether a pointer comes from userland in get_user(). While currently commented out (until LASS [2] is merged into the kernel) it's worth making changes to the LAM selftest ahead of time. Add test case to LAM that utilizes a ioctl (FIOASYNC) syscall which uses get_user() in its implementation. Execute the syscall with differently tagged pointers to verify that valid user pointers are passing through and invalid kernel/non-canonical pointers are not. Code was tested on a Sierra Forest Xeon machine that's LAM capable. The test was ran without issues with both the LAM lines from [1] untouched and commented out. The test was also ran without issues with LAM_SUP both enabled and disabled. [1] https://lore.kernel.org/all/20241024013214.129639-1-torvalds@linux-foundati… [2] https://lore.kernel.org/all/20240710160655.3402786-1-alexander.shishkin@lin… Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman(a)intel.com> --- tools/testing/selftests/x86/lam.c | 85 +++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) diff --git a/tools/testing/selftests/x86/lam.c b/tools/testing/selftests/x86/lam.c index 0ea4f6813930..3c53d4b7aa61 100644 --- a/tools/testing/selftests/x86/lam.c +++ b/tools/testing/selftests/x86/lam.c @@ -4,6 +4,7 @@ #include <stdlib.h> #include <string.h> #include <sys/syscall.h> +#include <sys/ioctl.h> #include <time.h> #include <signal.h> #include <setjmp.h> @@ -43,10 +44,19 @@ #define FUNC_INHERITE 0x20 #define FUNC_PASID 0x40 +/* get_user() pointer test cases */ +#define GET_USER_USER 0 +#define GET_USER_KERNEL_TOP 1 +#define GET_USER_KERNEL_BOT 2 +#define GET_USER_KERNEL 3 + #define TEST_MASK 0x7f +#define L5_SIGN_EXT_MASK (0xFFUL << 56) +#define L4_SIGN_EXT_MASK (0x1FFFFUL << 47) #define LOW_ADDR (0x1UL << 30) #define HIGH_ADDR (0x3UL << 48) +#define L5_ADDR (0x1UL << 48) #define MALLOC_LEN 32 @@ -370,6 +380,54 @@ static int handle_syscall(struct testcases *test) return ret; } +static int get_user_syscall(struct testcases *test) +{ + int ret = 0; + int ptr_value = 0; + void *ptr = &ptr_value; + int fd; + + uint64_t bitmask = ((uint64_t)ptr & L5_ADDR) ? L5_SIGN_EXT_MASK : + L4_SIGN_EXT_MASK; + + if (test->lam != 0) + if (set_lam(test->lam) != 0) + return 2; + + fd = memfd_create("lam_ioctl", 0); + if (fd == -1) + exit(EXIT_FAILURE); + + switch (test->later) { + case GET_USER_USER: + /* Control group - properly tagger user pointer */ + ptr = (void *)set_metadata((uint64_t)ptr, test->lam); + break; + case GET_USER_KERNEL_TOP: + /* Kernel address with top bit cleared */ + bitmask &= (bitmask >> 1); + ptr = (void *)((uint64_t)ptr | bitmask); + break; + case GET_USER_KERNEL_BOT: + /* Kernel address with bottom sign-extension bit cleared */ + bitmask &= (bitmask << 1); + ptr = (void *)((uint64_t)ptr | bitmask); + break; + case GET_USER_KERNEL: + /* Try to pass a kernel address */ + ptr = (void *)((uint64_t)ptr | bitmask); + break; + default: + printf("Invalid test case value passed!\n"); + break; + } + + if (ioctl(fd, FIOASYNC, ptr) != 0) + ret = 1; + + return ret; +} + int sys_uring_setup(unsigned int entries, struct io_uring_params *p) { return (int)syscall(__NR_io_uring_setup, entries, p); @@ -883,6 +941,33 @@ static struct testcases syscall_cases[] = { .test_func = handle_syscall, .msg = "SYSCALL:[Negative] Disable LAM. Dereferencing pointer with metadata.\n", }, + { + .later = GET_USER_USER, + .lam = LAM_U57_BITS, + .test_func = get_user_syscall, + .msg = "GET_USER: get_user() and pass a properly tagged user pointer.\n", + }, + { + .later = GET_USER_KERNEL_TOP, + .expected = 1, + .lam = LAM_U57_BITS, + .test_func = get_user_syscall, + .msg = "GET_USER:[Negative] get_user() with a kernel pointer and the top bit cleared.\n", + }, + { + .later = GET_USER_KERNEL_BOT, + .expected = 1, + .lam = LAM_U57_BITS, + .test_func = get_user_syscall, + .msg = "GET_USER:[Negative] get_user() with a kernel pointer and the bottom sign-extension bit cleared.\n", + }, + { + .later = GET_USER_KERNEL, + .expected = 1, + .lam = LAM_U57_BITS, + .test_func = get_user_syscall, + .msg = "GET_USER:[Negative] get_user() and pass a kernel pointer.\n", + }, }; static struct testcases mmap_cases[] = { -- 2.46.2

8 months

2
2
0 0

[PATCH v5 00/13] iommufd: Add vIOMMU infrastructure (Part-1)

by Nicolin Chen

This series introduces a new vIOMMU infrastructure and related ioctls. IOMMUFD has been using the HWPT infrastructure for all cases, including a nested IO page table support. Yet, there're limitations for an HWPT-based structure to support some advanced HW-accelerated features, such as CMDQV on NVIDIA Grace, and HW-accelerated vIOMMU on AMD. Even for a multi-IOMMU environment, it is not straightforward for nested HWPTs to share the same parent HWPT (stage-2 IO pagetable), with the HWPT infrastructure alone: a parent HWPT typically hold one stage-2 IO pagetable and tag it with only one ID in the cache entries. When sharing one large stage-2 IO pagetable across physical IOMMU instances, that one ID may not always be available across all the IOMMU instances. In other word, it's ideal for SW to have a different container for the stage-2 IO pagetable so it can hold another ID that's available. And this container will be able to hold some advanced feature too. For this "different container", add vIOMMU, an additional layer to hold extra virtualization information: _______________________________________________________________________ | iommufd (with vIOMMU) | | _____________ | | | | | | |----------------| vIOMMU | | | | ______ | | _____________ ________ | | | | | | | | | | | | | | | IOAS |<---|(HWPT_PAGING)|<---| HWPT_NESTED |<--| DEVICE | | | | |______| |_____________| |_____________| |________| | | | | | | | | |______|________|______________|__________________|_______________|_____| | | | | | ______v_____ | ______v_____ ______v_____ ___v__ | struct | | PFN | (paging) | | (nested) | |struct| |iommu_device| |------>|iommu_domain|<----|iommu_domain|<----|device| |____________| storage|____________| |____________| |______| The vIOMMU object should be seen as a slice of a physical IOMMU instance that is passed to or shared with a VM. That can be some HW/SW resources: - Security namespace for guest owned ID, e.g. guest-controlled cache tags - Access to a sharable nesting parent pagetable across physical IOMMUs - Non-affiliated event reporting (e.g. an invalidation queue error) - Virtualization of various platforms IDs, e.g. RIDs and others - Delivery of paravirtualized invalidation - Direct assigned invalidation queues - Direct assigned interrupts On a multi-IOMMU system, the vIOMMU object must be instanced to the number of the physical IOMMUs that have a slice passed to (via device) a guest VM, while being able to hold the shareable parent HWPT. Each vIOMMU then just needs to allocate its own individual ID to tag its own cache: ---------------------------- ---------------- | | paging_hwpt0 | | hwpt_nested0 |--->| viommu0 ------------------ ---------------- | | IDx | ---------------------------- ---------------------------- ---------------- | | paging_hwpt0 | | hwpt_nested1 |--->| viommu1 ------------------ ---------------- | | IDy | ---------------------------- As an initial part-1, add IOMMUFD_CMD_VIOMMU_ALLOC ioctl for an allocation only. And implement it in arm-smmu-v3 driver as a real world use case. More vIOMMU-based structs and ioctls will be introduced in the follow-up series to support vDEVICE, vIRQ (vEVENT) and vQUEUE objects. Although we repurposed the vIOMMU object from an earlier RFC, just for a referece: https://lore.kernel.org/all/cover.1712978212.git.nicolinc@nvidia.com/ This series is on Github: https://github.com/nicolinc/iommufd/commits/iommufd_viommu_p1-v5 (paring QEMU branch for testing will be provided with the part2 series) Changelog v5 * Added "Reviewed-by" from Kevin * Reworked iommufd_viommu_alloc helper * Revised the uAPI kdoc for vIOMMU object * Revised comments for pluggable iommu_dev * Added a couple of cleanup patches for selftest * Renamed domain_alloc_nested op to alloc_domain_nested * Updated a few commit messages to reflect the latest series * Renamed iommufd_hwpt_nested_alloc_for_viommu to iommufd_viommu_alloc_hwpt_nested, and added flag validation v4 https://lore.kernel.org/all/cover.1729553811.git.nicolinc@nvidia.com/ * Added "Reviewed-by" from Jason * Dropped IOMMU_VIOMMU_TYPE_DEFAULT support * Dropped iommufd_object_alloc_elm renamings * Renamed iommufd's viommu_api.c to driver.c * Reworked iommufd_viommu_alloc helper * Added a separate iommufd_hwpt_nested_alloc_for_viommu function for hwpt_nested allocations on a vIOMMU, and added comparison between viommu->iommu_dev->ops and dev_iommu_ops(idev->dev) * Replaced s2_parent with vsmmu in arm_smmu_nested_domain * Replaced domain_alloc_user in iommu_ops with domain_alloc_nested in viommu_ops * Replaced wait_queue_head_t with a completion, to delay the unplug of mock_iommu_dev * Corrected documentation graph that was missing struct iommu_device * Added an iommufd_verify_unfinalized_object helper to verify driver- allocated vIOMMU/vDEVICE objects * Added missing test cases for TEST_LENGTH and fail_nth v3 https://lore.kernel.org/all/cover.1728491453.git.nicolinc@nvidia.com/ * Rebased on top of Jason's nesting v3 series https://lore.kernel.org/all/0-v3-e2e16cd7467f+2a6a1-smmuv3_nesting_jgg@nvid… * Split the series into smaller parts * Added Jason's Reviewed-by * Added back viommu->iommu_dev * Added support for driver-allocated vIOMMU v.s. core-allocated * Dropped arm_smmu_cache_invalidate_user * Added an iommufd_test_wait_for_users() in selftest * Reworked test code to make viommu an individual FIXTURE * Added missing TEST_LENGTH case for the new ioctl command v2 https://lore.kernel.org/all/cover.1724776335.git.nicolinc@nvidia.com/ * Limited vdev_id to one per idev * Added a rw_sem to protect the vdev_id list * Reworked driver-level APIs with proper lockings * Added a new viommu_api file for IOMMUFD_DRIVER config * Dropped useless iommu_dev point from the viommu structure * Added missing index numnbers to new types in the uAPI header * Dropped IOMMU_VIOMMU_INVALIDATE uAPI; Instead, reuse the HWPT one * Reworked mock_viommu_cache_invalidate() using the new iommu helper * Reordered details of set/unset_vdev_id handlers for proper lockings v1 https://lore.kernel.org/all/cover.1723061377.git.nicolinc@nvidia.com/ Thanks! Nicolin Nicolin Chen (13): iommufd: Move struct iommufd_object to public iommufd header iommufd: Introduce IOMMUFD_OBJ_VIOMMU and its related struct iommufd: Add iommufd_verify_unfinalized_object iommufd/viommu: Add IOMMU_VIOMMU_ALLOC ioctl iommufd: Add alloc_domain_nested op to iommufd_viommu_ops iommufd: Allow pt_id to carry viommu_id for IOMMU_HWPT_ALLOC iommufd/selftest: Add container_of helpers iommufd/selftest: Prepare for mock_viommu_alloc_domain_nested() iommufd/selftest: Add refcount to mock_iommu_device iommufd/selftest: Add IOMMU_VIOMMU_TYPE_SELFTEST iommufd/selftest: Add IOMMU_VIOMMU_ALLOC test coverage Documentation: userspace-api: iommufd: Update vIOMMU iommu/arm-smmu-v3: Add IOMMU_VIOMMU_TYPE_ARM_SMMUV3 support drivers/iommu/iommufd/Makefile | 5 +- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 26 +- drivers/iommu/iommufd/iommufd_private.h | 36 +-- drivers/iommu/iommufd/iommufd_test.h | 2 + include/linux/iommu.h | 14 + include/linux/iommufd.h | 86 ++++++ include/uapi/linux/iommufd.h | 56 +++- tools/testing/selftests/iommu/iommufd_utils.h | 28 ++ .../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 80 ++++-- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 9 +- drivers/iommu/iommufd/driver.c | 38 +++ drivers/iommu/iommufd/hw_pagetable.c | 71 ++++- drivers/iommu/iommufd/main.c | 58 ++-- drivers/iommu/iommufd/selftest.c | 256 ++++++++++++------ drivers/iommu/iommufd/viommu.c | 89 ++++++ tools/testing/selftests/iommu/iommufd.c | 87 ++++++ .../selftests/iommu/iommufd_fail_nth.c | 11 + Documentation/userspace-api/iommufd.rst | 69 ++++- 18 files changed, 827 insertions(+), 194 deletions(-) create mode 100644 drivers/iommu/iommufd/driver.c create mode 100644 drivers/iommu/iommufd/viommu.c -- 2.43.0

8 months

4
52
0 0

[PATCH] selftests: netfilter: remove unused parameter

by Liu Jing

Signed-off-by: Liu Jing <liujing(a)cmss.chinamobile.com> --- V1 -> V2: Delete more unused parameters, such as err, v1 only deleted rplnlh parameter Signed-off-by: Liu Jing <liujing(a)cmss.chinamobile.com> --- .../testing/selftests/net/netfilter/conntrack_dump_flush.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c b/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c index e03ddc60b5d4..63ae49f166a1 100644 --- a/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c +++ b/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c @@ -97,7 +97,7 @@ static int conntrack_data_insert(struct mnl_socket *sock, struct nlmsghdr *nlh, { char buf[MNL_SOCKET_BUFFER_SIZE]; unsigned int portid; - int err, ret; + int ret; portid = mnl_socket_get_portid(sock); @@ -215,7 +215,7 @@ static int conntracK_count_zone(struct mnl_socket *sock, uint16_t zone) struct nfgenmsg *nfh; struct nlattr *nest; unsigned int portid; - int err, ret; + int ret; portid = mnl_socket_get_portid(sock); @@ -262,7 +262,7 @@ static int conntrack_flush_zone(struct mnl_socket *sock, uint16_t zone) struct nfgenmsg *nfh; struct nlattr *nest; unsigned int portid; - int err, ret; + int ret; portid = mnl_socket_get_portid(sock); -- 2.27.0

8 months

2
1
0 0

[PATCH][next] KVM: s390: selftests: Fix spelling mistake "avaialable" -> "available"

by Colin Ian King

There is a spelling mistake in a ksft_test_result_skip message. Fix it. Signed-off-by: Colin Ian King <colin.i.king(a)gmail.com> --- tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c b/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c index 222ba1cc3cac..34e0ceceaa74 100644 --- a/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c +++ b/tools/testing/selftests/kvm/s390x/cpumodel_subfuncs_test.c @@ -276,7 +276,7 @@ int main(int argc, char *argv[]) ksft_test_result_pass("%s\n", testlist[idx].subfunc_name); free(array); } else { - ksft_test_result_skip("%s feature is not avaialable\n", + ksft_test_result_skip("%s feature is not available\n", testlist[idx].subfunc_name); } } -- 2.39.5

8 months

1
0
0 0

[PATCH v2 0/3] rust: kunit: Support KUnit tests with a user-space like syntax

by David Gow

This series was originally written by José Expósito, and has been modified and updated by Matt Gilbride and myself. The original version can be found here: https://github.com/Rust-for-Linux/linux/pull/950 Add support for writing KUnit tests in Rust. While Rust doctests are already converted to KUnit tests and run, they're really better suited for examples, rather than as first-class unit tests. This series implements a series of direct Rust bindings for KUnit tests, as well as a new macro which allows KUnit tests to be written using a close variant of normal Rust unit test syntax. The only change required is replacing '#[cfg(test)]' with '#[kunit_tests(kunit_test_suite_name)]' An example test would look like: #[kunit_tests(rust_kernel_hid_driver)] mod tests { use super::*; use crate::{c_str, driver, hid, prelude::*}; use core::ptr; struct SimpleTestDriver; impl Driver for SimpleTestDriver { type Data = (); } #[test] fn rust_test_hid_driver_adapter() { let mut hid = bindings::hid_driver::default(); let name = c_str!("SimpleTestDriver"); static MODULE: ThisModule = unsafe { ThisModule::from_ptr(ptr::null_mut()) }; let res = unsafe { <hid::Adapter<SimpleTestDriver> as driver::DriverOps>::register(&mut hid, name, &MODULE) }; assert_eq!(res, Err(ENODEV)); // The mock returns -19 } } Please give this a go, and make sure I haven't broken it! There's almost certainly a lot of improvements which can be made -- and there's a fair case to be made for replacing some of this with generated C code which can use the C macros -- but this is hopefully an adequate implementation for now, and the interface can (with luck) remain the same even if the implementation changes. A few small notable missing features: - Attributes (like the speed of a test) are hardcoded to the default value. - Similarly, the module name attribute is hardcoded to NULL. In C, we use the KBUILD_MODNAME macro, but I couldn't find a way to use this from Rust which wasn't more ugly than just disabling it. - Assertions are not automatically rewritten to use KUnit assertions. --- Changes since v1: https://lore.kernel.org/lkml/20230720-rustbind-v1-0-c80db349e3b5@google.com… - Rebase on top of the latest rust-next (commit 718c4069896c) - Make kunit_case a const fn, rather than a macro (Thanks Boqun) - As a result, the null terminator is now created with kernel::kunit::kunit_case_null() - Use the C kunit_get_current_test() function to implement in_kunit_test(), rather than re-implementing it (less efficiently) ourselves. Changes since the GitHub PR: - Rebased on top of kselftest/kunit - Add const_mut_refs feature This may conflict with https://lore.kernel.org/lkml/20230503090708.2524310-6-nmi@metaspace.dk/ - Add rust/macros/kunit.rs to the KUnit MAINTAINERS entry --- José Expósito (3): rust: kunit: add KUnit case and suite macros rust: macros: add macro to easily run KUnit tests rust: kunit: allow to know if we are in a test MAINTAINERS | 1 + rust/kernel/kunit.rs | 191 +++++++++++++++++++++++++++++++++++++++++++ rust/kernel/lib.rs | 1 + rust/macros/lib.rs | 29 +++++++ 4 files changed, 222 insertions(+) -- 2.47.0.163.g1226f6d8fa-goog

8 months

3
8
0 0

[PATCH] selftest/hid: increase timeout to 10 min

by Yun Lu

If running hid testcases with command "./run_kselftest.sh -c hid", the following tests will take longer than the kselftest framework timeout (now 200 seconds) to run and thus got terminated with TIMEOUT error: hid-multitouch.sh - took about 6min41s hid-tablet.sh - took about 6min30s Increase the timeout setting to 10 minutes to allow them have a chance to finish. Cc: stable(a)vger.kernel.org Signed-off-by: Yun Lu <luyun(a)kylinos.cn> --- tools/testing/selftests/hid/settings | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/hid/settings b/tools/testing/selftests/hid/settings index b3cbfc521b10..dff0d947f9c2 100644 --- a/tools/testing/selftests/hid/settings +++ b/tools/testing/selftests/hid/settings @@ -1,3 +1,3 @@ # HID tests can be long, so give a little bit more time # to them -timeout=200 +timeout=600 -- 2.27.0

8 months

3
2
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[PATCH bpf-next v2] selftests/bpf: Drop netns helpers in mptcp

by Geliang Tang

From: Geliang Tang <tanggeliang(a)kylinos.cn> New netns selftest helpers netns_new() and netns_free() has been added in network_helpers.c, let's use them in mptcp selftests too instead of using MPTCP's own helpers create_netns() and cleanup_netns(). Signed-off-by: Geliang Tang <tanggeliang(a)kylinos.cn> --- v2: - Use netns_new/netns_free instead of create_netns/cleanup_netns as Martin suggested. v1: selftests/bpf: Use make/remove netns helpers in mptcp --- .../testing/selftests/bpf/prog_tests/mptcp.c | 42 ++++++------------- 1 file changed, 12 insertions(+), 30 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c index be3cad2aff77..f8eb7f9d4fd2 100644 --- a/tools/testing/selftests/bpf/prog_tests/mptcp.c +++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c @@ -69,24 +69,6 @@ struct mptcp_storage { char ca_name[TCP_CA_NAME_MAX]; }; -static struct nstoken *create_netns(void) -{ - SYS(fail, "ip netns add %s", NS_TEST); - SYS(fail, "ip -net %s link set dev lo up", NS_TEST); - - return open_netns(NS_TEST); -fail: - return NULL; -} - -static void cleanup_netns(struct nstoken *nstoken) -{ - if (nstoken) - close_netns(nstoken); - - SYS_NOFAIL("ip netns del %s", NS_TEST); -} - static int start_mptcp_server(int family, const char *addr_str, __u16 port, int timeout_ms) { @@ -206,15 +188,15 @@ static int run_test(int cgroup_fd, int server_fd, bool is_mptcp) static void test_base(void) { - struct nstoken *nstoken = NULL; + struct netns_obj *netns = NULL; int server_fd, cgroup_fd; cgroup_fd = test__join_cgroup("/mptcp"); if (!ASSERT_GE(cgroup_fd, 0, "test__join_cgroup")) return; - nstoken = create_netns(); - if (!ASSERT_OK_PTR(nstoken, "create_netns")) + netns = netns_new(NS_TEST, true); + if (!ASSERT_OK_PTR(netns, "netns_new")) goto fail; /* without MPTCP */ @@ -237,7 +219,7 @@ static void test_base(void) close(server_fd); fail: - cleanup_netns(nstoken); + netns_free(netns); close(cgroup_fd); } @@ -322,21 +304,21 @@ static int run_mptcpify(int cgroup_fd) static void test_mptcpify(void) { - struct nstoken *nstoken = NULL; + struct netns_obj *netns = NULL; int cgroup_fd; cgroup_fd = test__join_cgroup("/mptcpify"); if (!ASSERT_GE(cgroup_fd, 0, "test__join_cgroup")) return; - nstoken = create_netns(); - if (!ASSERT_OK_PTR(nstoken, "create_netns")) + netns = netns_new(NS_TEST, true); + if (!ASSERT_OK_PTR(netns, "netns_new")) goto fail; ASSERT_OK(run_mptcpify(cgroup_fd), "run_mptcpify"); fail: - cleanup_netns(nstoken); + netns_free(netns); close(cgroup_fd); } @@ -414,7 +396,7 @@ static void run_subflow(void) static void test_subflow(void) { struct mptcp_subflow *skel; - struct nstoken *nstoken; + struct netns_obj *netns; int cgroup_fd; cgroup_fd = test__join_cgroup("/mptcp_subflow"); @@ -437,8 +419,8 @@ static void test_subflow(void) if (!ASSERT_OK_PTR(skel->links._getsockopt_subflow, "attach _getsockopt_subflow")) goto skel_destroy; - nstoken = create_netns(); - if (!ASSERT_OK_PTR(nstoken, "create_netns: mptcp_subflow")) + netns = netns_new(NS_TEST, true); + if (!ASSERT_OK_PTR(netns, "netns_new: mptcp_subflow")) goto skel_destroy; if (endpoint_init("subflow") < 0) @@ -447,7 +429,7 @@ static void test_subflow(void) run_subflow(); close_netns: - cleanup_netns(nstoken); + netns_free(netns); skel_destroy: mptcp_subflow__destroy(skel); close_cgroup: -- 2.45.2

8 months

1
0
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[PATCH v5 00/13] iommufd: Add vIOMMU infrastructure (Part-2: vDEVICE)

by Nicolin Chen

Following the previous vIOMMU series, this adds another vDEVICE structure, representing the association from an iommufd_device to an iommufd_viommu. This gives the whole architecture a new "v" layer: _______________________________________________________________________ | iommufd (with vIOMMU/vDEVICE) | | _____________ _____________ | | | | | | | | |----------------| vIOMMU |<---| vDEVICE |<------| | | | | | |_____________| | | | | ______ | | _____________ ___|____ | | | | | | | | | | | | | | | IOAS |<---|(HWPT_PAGING)|<---| HWPT_NESTED |<--| DEVICE | | | | |______| |_____________| |_____________| |________| | |______|________|______________|__________________|_______________|_____| | | | | | ______v_____ | ______v_____ ______v_____ ___v__ | struct | | PFN | (paging) | | (nested) | |struct| |iommu_device| |------>|iommu_domain|<----|iommu_domain|<----|device| |____________| storage|____________| |____________| |______| This vDEVICE object is used to collect and store all vIOMMU-related device information/attributes in a VM. As an initial series for vDEVICE, add only the virt_id to the vDEVICE, which is a vIOMMU specific device ID in a VM: e.g. vSID of ARM SMMUv3, vDeviceID of AMD IOMMU, and vID of Intel VT-d to a Context Table. This virt_id helps IOMMU drivers to link the vID to a pID of the device against the physical IOMMU instance. This is essential for a vIOMMU-based invalidation, where the request contains a device's vID for a device cache flush, e.g. ATC invalidation. Therefore, with this vDEVICE object, support a vIOMMU-based invalidation, by reusing IOMMUFD_CMD_HWPT_INVALIDATE for a vIOMMU object to flush cache with a given driver data. As for the implementation of the series, add driver support in ARM SMMUv3 for a real world use case. This series is on Github: https://github.com/nicolinc/iommufd/commits/iommufd_viommu_p2-v5 For testing, try this "with-rmr" branch: https://github.com/nicolinc/iommufd/commits/iommufd_viommu_p2-v5-with-rmr Paring QEMU branch for testing: https://github.com/nicolinc/qemu/commits/wip/for_iommufd_viommu_p2-v5 Changelog v5 * Dropped driver-allocated vDEVICE support * Changed vdev_to_dev helper to iommufd_viommu_find_dev v4 https://lore.kernel.org/all/cover.1729555967.git.nicolinc@nvidia.com/ * Added missing brackets in switch-case * Fixed the unreleased idev refcount issue * Reworked the iommufd_vdevice_alloc allocator * Dropped support for IOMMU_VIOMMU_TYPE_DEFAULT * Added missing TEST_LENGTH and fail_nth coverages * Added a verification to the driver-allocated vDEVICE object * Added an iommufd_vdevice_abort for a missing mutex protection * Added a u64 structure arm_vsmmu_invalidation_cmd for user command conversion v3 https://lore.kernel.org/all/cover.1728491532.git.nicolinc@nvidia.com/ * Added Jason's Reviewed-by * Split this invalidation part out of the part-1 series * Repurposed VDEV_ID ioctl to a wider vDEVICE structure and ioctl * Reduced viommu_api functions by allowing drivers to access viommu and vdevice structure directly * Dropped vdevs_rwsem by using xa_lock instead * Dropped arm_smmu_cache_invalidate_user v2 https://lore.kernel.org/all/cover.1724776335.git.nicolinc@nvidia.com/ * Limited vdev_id to one per idev * Added a rw_sem to protect the vdev_id list * Reworked driver-level APIs with proper lockings * Added a new viommu_api file for IOMMUFD_DRIVER config * Dropped useless iommu_dev point from the viommu structure * Added missing index numnbers to new types in the uAPI header * Dropped IOMMU_VIOMMU_INVALIDATE uAPI; Instead, reuse the HWPT one * Reworked mock_viommu_cache_invalidate() using the new iommu helper * Reordered details of set/unset_vdev_id handlers for proper lockings v1 https://lore.kernel.org/all/cover.1723061377.git.nicolinc@nvidia.com/ Thanks! Nicolin Jason Gunthorpe (2): iommu: Add iommu_copy_struct_from_full_user_array helper iommu/arm-smmu-v3: Allow ATS for IOMMU_DOMAIN_NESTED Nicolin Chen (11): iommufd/viommu: Add IOMMUFD_OBJ_VDEVICE and IOMMU_VDEVICE_ALLOC ioctl iommufd/selftest: Add IOMMU_VDEVICE_ALLOC test coverage iommu/viommu: Add cache_invalidate to iommufd_viommu_ops iommufd/hw_pagetable: Enforce invalidation op on vIOMMU-based hwpt_nested iommufd: Allow hwpt_id to carry viommu_id for IOMMU_HWPT_INVALIDATE iommufd/viommu: Add iommufd_viommu_find_dev helper iommufd/selftest: Add mock_viommu_cache_invalidate iommufd/selftest: Add IOMMU_TEST_OP_DEV_CHECK_CACHE test command iommufd/selftest: Add vIOMMU coverage for IOMMU_HWPT_INVALIDATE ioctl Documentation: userspace-api: iommufd: Update vDEVICE iommu/arm-smmu-v3: Add arm_vsmmu_cache_invalidate drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 9 +- drivers/iommu/iommufd/iommufd_private.h | 20 ++ drivers/iommu/iommufd/iommufd_test.h | 30 +++ include/linux/iommu.h | 48 ++++- include/linux/iommufd.h | 21 ++ include/uapi/linux/iommufd.h | 61 +++++- tools/testing/selftests/iommu/iommufd_utils.h | 83 +++++++ .../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 161 +++++++++++++- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 32 ++- drivers/iommu/iommufd/device.c | 11 + drivers/iommu/iommufd/driver.c | 13 ++ drivers/iommu/iommufd/hw_pagetable.c | 36 +++- drivers/iommu/iommufd/main.c | 7 + drivers/iommu/iommufd/selftest.c | 98 ++++++++- drivers/iommu/iommufd/viommu.c | 101 +++++++++ tools/testing/selftests/iommu/iommufd.c | 204 +++++++++++++++++- .../selftests/iommu/iommufd_fail_nth.c | 4 + Documentation/userspace-api/iommufd.rst | 41 +++- 18 files changed, 942 insertions(+), 38 deletions(-) -- 2.43.0

8 months

4
43
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[PATCH v3] selftests/net: Add missing gitignore file

by Li Zhijian

Compiled binary files should be added to .gitignore 'git status' complains: Untracked files: (use "git add <file>..." to include in what will be committed) net/netfilter/conntrack_reverse_clash Cc: Pablo Neira Ayuso <pablo(a)netfilter.org> Cc: Jozsef Kadlecsik <kadlec(a)netfilter.org> Cc: "David S. Miller" <davem(a)davemloft.net> Cc: Eric Dumazet <edumazet(a)google.com> Cc: Jakub Kicinski <kuba(a)kernel.org> Cc: Paolo Abeni <pabeni(a)redhat.com> Cc: Shuah Khan <shuah(a)kernel.org> Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> --- Cc: netfilter-devel(a)vger.kernel.org Cc: coreteam(a)netfilter.org Cc: netdev(a)vger.kernel.org --- Hello, Cover letter is here. This patch set aims to make 'git status' clear after 'make' and 'make run_tests' for kselftests. --- V3: sort the files V2: split as a separate patch from a small one [0] [0] https://lore.kernel.org/linux-kselftest/20241015010817.453539-1-lizhijian@f… Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> --- tools/testing/selftests/net/netfilter/.gitignore | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/net/netfilter/.gitignore b/tools/testing/selftests/net/netfilter/.gitignore index 0a64d6d0e29a..64c4f8d9aa6c 100644 --- a/tools/testing/selftests/net/netfilter/.gitignore +++ b/tools/testing/selftests/net/netfilter/.gitignore @@ -2,5 +2,6 @@ audit_logread connect_close conntrack_dump_flush +conntrack_reverse_clash sctp_collision nf_queue -- 2.44.0

8 months

1
0
0 0

[PATCH for-next 1/7] selftests/alsa: Add a few missing gitignore files

by Li Zhijian

Compiled binary files should be added to .gitignore 'git status' complains: Untracked files: (use "git add <file>..." to include in what will be committed) alsa/global-timer alsa/utimer-test Cc: Mark Brown <broonie(a)kernel.org> Cc: Jaroslav Kysela <perex(a)perex.cz> Cc: Takashi Iwai <tiwai(a)suse.com> Cc: Shuah Khan <shuah(a)kernel.org> Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> --- Cc: linux-sound(a)vger.kernel.org --- Hello, Cover letter is here. This patch set aims to make 'git status' clear after 'make' and 'make run_tests' for kselftests. --- V2: split as a separate patch from a small one [0] [0] https://lore.kernel.org/linux-kselftest/20241015010817.453539-1-lizhijian@f… --- tools/testing/selftests/alsa/.gitignore | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/alsa/.gitignore b/tools/testing/selftests/alsa/.gitignore index 12dc3fcd3456..1407fd24a97b 100644 --- a/tools/testing/selftests/alsa/.gitignore +++ b/tools/testing/selftests/alsa/.gitignore @@ -1,3 +1,5 @@ mixer-test pcm-test test-pcmtest-driver +global-timer +utimer-test -- 2.44.0

8 months

5
13
0 0

[PATCH net-next v5 00/12] selftests: ncdevmem: Add ncdevmem to ksft

by Stanislav Fomichev

The goal of the series is to simplify and make it possible to use ncdevmem in an automated way from the ksft python wrapper. ncdevmem is slowly mutated into a state where it uses stdout to print the payload and the python wrapper is added to make sure the arrived payload matches the expected one. v5: - properly handle errors from inet_pton() and socket() (Paolo) - remove unneeded import from python selftest (Paolo) v4: - keep usage example with validation (Mina) - fix compilation issue in one patch (s/start_queues/start_queue/) v3: - keep and refine the comment about ncdevmem invocation (Mina) - add the comment about not enforcing exit status for ntuple reset (Mina) - make configure_headersplit more robust (Mina) - use num_queues/2 in selftest and let the users override it (Mina) - remove memory_provider.memcpy_to_device (Mina) - keep ksft as is (don't use -v validate flags): we are gonna need a --debug-disable flag to make it less chatty; otherwise it times out when sending too much data; so leaving it as a separate follow up v2: - don't remove validation (Mina) - keep 5-tuple flow steering but use it only when -c is provided (Mina) - remove separate flag for probing (Mina) - move ncdevmem under drivers/net/hw, not drivers/net (Jakub) Cc: Mina Almasry <almasrymina(a)google.com> Stanislav Fomichev (12): selftests: ncdevmem: Redirect all non-payload output to stderr selftests: ncdevmem: Separate out dmabuf provider selftests: ncdevmem: Unify error handling selftests: ncdevmem: Make client_ip optional selftests: ncdevmem: Remove default arguments selftests: ncdevmem: Switch to AF_INET6 selftests: ncdevmem: Properly reset flow steering selftests: ncdevmem: Use YNL to enable TCP header split selftests: ncdevmem: Remove hard-coded queue numbers selftests: ncdevmem: Run selftest when none of the -s or -c has been provided selftests: ncdevmem: Move ncdevmem under drivers/net/hw selftests: ncdevmem: Add automated test .../selftests/drivers/net/hw/.gitignore | 1 + .../testing/selftests/drivers/net/hw/Makefile | 9 + .../selftests/drivers/net/hw/devmem.py | 45 + .../selftests/drivers/net/hw/ncdevmem.c | 773 ++++++++++++++++++ tools/testing/selftests/net/.gitignore | 1 - tools/testing/selftests/net/Makefile | 8 - tools/testing/selftests/net/ncdevmem.c | 570 ------------- 7 files changed, 828 insertions(+), 579 deletions(-) create mode 100644 tools/testing/selftests/drivers/net/hw/.gitignore create mode 100755 tools/testing/selftests/drivers/net/hw/devmem.py create mode 100644 tools/testing/selftests/drivers/net/hw/ncdevmem.c delete mode 100644 tools/testing/selftests/net/ncdevmem.c -- 2.47.0

8 months

3
14
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[PATCH v6 00/33] riscv control-flow integrity for usermode

by Deepak Gupta

Basics and overview =================== Software with larger attack surfaces (e.g. network facing apps like databases, browsers or apps relying on browser runtimes) suffer from memory corruption issues which can be utilized by attackers to bend control flow of the program to eventually gain control (by making their payload executable). Attackers are able to perform such attacks by leveraging call-sites which rely on indirect calls or return sites which rely on obtaining return address from stack memory. To mitigate such attacks, risc-v extension zicfilp enforces that all indirect calls must land on a landing pad instruction `lpad` else cpu will raise software check exception (a new cpu exception cause code on riscv). Similarly for return flow, risc-v extension zicfiss extends architecture with - `sspush` instruction to push return address on a shadow stack - `sspopchk` instruction to pop return address from shadow stack and compare with input operand (i.e. return address on stack) - `sspopchk` to raise software check exception if comparision above was a mismatch - Protection mechanism using which shadow stack is not writeable via regular store instructions More information an details can be found at extensions github repo [1]. Equivalent to landing pad (zicfilp) on x86 is `ENDBRANCH` instruction in Intel CET [3] and branch target identification (BTI) [4] on arm. Similarly x86's Intel CET has shadow stack [5] and arm64 has guarded control stack (GCS) [6] which are very similar to risc-v's zicfiss shadow stack. x86 already supports shadow stack for user mode and arm64 support for GCS in usermode [7] is ongoing. Kernel awareness for user control flow integrity ================================================ This series picks up Samuel Holland's envcfg changes [2] as well. So if those are being applied independently, they should be removed from this series. Enabling: In order to maintain compatibility and not break anything in user mode, kernel doesn't enable control flow integrity cpu extensions on binary by default. Instead exposes a prctl interface to enable, disable and lock the shadow stack or landing pad feature for a task. This allows userspace (loader) to enumerate if all objects in its address space are compiled with shadow stack and landing pad support and accordingly enable the feature. Additionally if a subsequent `dlopen` happens on a library, user mode can take a decision again to disable the feature (if incoming library is not compiled with support) OR terminate the task (if user mode policy is strict to have all objects in address space to be compiled with control flow integirty cpu feature). prctl to enable shadow stack results in allocating shadow stack from virtual memory and activating for user address space. x86 and arm64 are also following same direction due to similar reason(s). clone/fork: On clone and fork, cfi state for task is inherited by child. Shadow stack is part of virtual memory and is a writeable memory from kernel perspective (writeable via a restricted set of instructions aka shadow stack instructions) Thus kernel changes ensure that this memory is converted into read-only when fork/clone happens and COWed when fault is taken due to sspush, sspopchk or ssamoswap. In case `CLONE_VM` is specified and shadow stack is to be enabled, kernel will automatically allocate a shadow stack for that clone call. map_shadow_stack: x86 introduced `map_shadow_stack` system call to allow user space to explicitly map shadow stack memory in its address space. It is useful to allocate shadow for different contexts managed by a single thread (green threads or contexts) risc-v implements this system call as well. signal management: If shadow stack is enabled for a task, kernel performs an asynchronous control flow diversion to deliver the signal and eventually expects userspace to issue sigreturn so that original execution can be resumed. Even though resume context is prepared by kernel, it is in user space memory and is subject to memory corruption and corruption bugs can be utilized by attacker in this race window to perform arbitrary sigreturn and eventually bypass cfi mechanism. Another issue is how to ensure that cfi related state on sigcontext area is not trampled by legacy apps or apps compiled with old kernel headers. In order to mitigate control-flow hijacting, kernel prepares a token and place it on shadow stack before signal delivery and places address of token in sigcontext structure. During sigreturn, kernel obtains address of token from sigcontext struture, reads token from shadow stack and validates it and only then allow sigreturn to succeed. Compatiblity issue is solved by adopting dynamic sigcontext management introduced for vector extension. This series re-factor the code little bit to allow future sigcontext management easy (as proposed by Andy Chiu from SiFive) config and compilation: Introduce a new risc-v config option `CONFIG_RISCV_USER_CFI`. Selecting this config option picks the kernel support for user control flow integrity. This optin is presented only if toolchain has shadow stack and landing pad support. And is on purpose guarded by toolchain support. Reason being that eventually vDSO also needs to be compiled in with shadow stack and landing pad support. vDSO compile patches are not included as of now because landing pad labeling scheme is yet to settle for usermode runtime. To get more information on kernel interactions with respect to zicfilp and zicfiss, patch series adds documentation for `zicfilp` and `zicfiss` in following: Documentation/arch/riscv/zicfiss.rst Documentation/arch/riscv/zicfilp.rst How to test this series ======================= Toolchain --------- $ git clone git@github.com:sifive/riscv-gnu-toolchain.git -b cfi-dev $ riscv-gnu-toolchain/configure --prefix=<path-to-where-to-build> --with-arch=rv64gc_zicfilp_zicfiss --enable-linux --disable-gdb --with-extra-multilib-test="rv64gc_zicfilp_zicfiss-lp64d:-static" $ make -j$(nproc) Qemu ---- $ git clone git@github.com:deepak0414/qemu.git -b zicfilp_zicfiss_ratified_master_july11 $ cd qemu $ mkdir build $ cd build $ ../configure --target-list=riscv64-softmmu $ make -j$(nproc) Opensbi ------- $ git clone git@github.com:deepak0414/opensbi.git -b v6_cfi_spec_split_opensbi $ make CROSS_COMPILE=<your riscv toolchain> -j$(nproc) PLATFORM=generic Linux ----- Running defconfig is fine. CFI is enabled by default if the toolchain supports it. $ make ARCH=riscv CROSS_COMPILE=<path-to-cfi-riscv-gnu-toolchain>/build/bin/riscv64-unknown-linux-gnu- -j$(nproc) defconfig $ make ARCH=riscv CROSS_COMPILE=<path-to-cfi-riscv-gnu-toolchain>/build/bin/riscv64-unknown-linux-gnu- -j$(nproc) Branch where user cfi enabling patches are maintained https://github.com/deepak0414/linux-riscv-cfi/tree/vdso_user_cfi_v6.12-rc1 In case you're building your own rootfs using toolchain, please make sure you pick following patch to ensure that vDSO compiled with lpad and shadow stack. "arch/riscv: compile vdso with landing pad" Running ------- Modify your qemu command to have: -bios <path-to-cfi-opensbi>/build/platform/generic/firmware/fw_dynamic.bin -cpu rv64,zicfilp=true,zicfiss=true,zimop=true,zcmop=true vDSO related Opens (in the flux) ================================= I am listing these opens for laying out plan and what to expect in future patch sets. And of course for the sake of discussion. Shadow stack and landing pad enabling in vDSO ---------------------------------------------- vDSO must have shadow stack and landing pad support compiled in for task to have shadow stack and landing pad support. This patch series doesn't enable that (yet). Enabling shadow stack support in vDSO should be straight forward (intend to do that in next versions of patch set). Enabling landing pad support in vDSO requires some collaboration with toolchain folks to follow a single label scheme for all object binaries. This is necessary to ensure that all indirect call-sites are setting correct label and target landing pads are decorated with same label scheme. How many vDSOs --------------- Shadow stack instructions are carved out of zimop (may be operations) and if CPU doesn't implement zimop, they're illegal instructions. Kernel could be running on a CPU which may or may not implement zimop. And thus kernel will have to carry 2 different vDSOs and expose the appropriate one depending on whether CPU implements zimop or not. References ========== [1] - https://github.com/riscv/riscv-cfi [2] - https://lore.kernel.org/all/20240814081126.956287-1-samuel.holland@sifive.c… [3] - https://lwn.net/Articles/889475/ [4] - https://developer.arm.com/documentation/109576/0100/Branch-Target-Identific… [5] - https://www.intel.com/content/dam/develop/external/us/en/documents/catc17-i… [6] - https://lwn.net/Articles/940403/ [7] - https://lore.kernel.org/all/20241001-arm64-gcs-v13-0-222b78d87eee@kernel.or… To: Thomas Gleixner <tglx(a)linutronix.de> To: Ingo Molnar <mingo(a)redhat.com> To: Borislav Petkov <bp(a)alien8.de> To: Dave Hansen <dave.hansen(a)linux.intel.com> To: x86(a)kernel.org To: H. Peter Anvin <hpa(a)zytor.com> To: Andrew Morton <akpm(a)linux-foundation.org> To: Liam R. Howlett <Liam.Howlett(a)oracle.com> To: Vlastimil Babka <vbabka(a)suse.cz> To: Lorenzo Stoakes <lorenzo.stoakes(a)oracle.com> To: Paul Walmsley <paul.walmsley(a)sifive.com> To: Palmer Dabbelt <palmer(a)dabbelt.com> To: Albert Ou <aou(a)eecs.berkeley.edu> To: Conor Dooley <conor(a)kernel.org> To: Rob Herring <robh(a)kernel.org> To: Krzysztof Kozlowski <krzk+dt(a)kernel.org> To: Arnd Bergmann <arnd(a)arndb.de> To: Christian Brauner <brauner(a)kernel.org> To: Peter Zijlstra <peterz(a)infradead.org> To: Oleg Nesterov <oleg(a)redhat.com> To: Eric Biederman <ebiederm(a)xmission.com> To: Kees Cook <kees(a)kernel.org> To: Jonathan Corbet <corbet(a)lwn.net> To: Shuah Khan <shuah(a)kernel.org> Cc: linux-kernel(a)vger.kernel.org Cc: linux-fsdevel(a)vger.kernel.org Cc: linux-mm(a)kvack.org Cc: linux-riscv(a)lists.infradead.org Cc: devicetree(a)vger.kernel.org Cc: linux-arch(a)vger.kernel.org Cc: linux-doc(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org Cc: alistair.francis(a)wdc.com Cc: richard.henderson(a)linaro.org Cc: jim.shu(a)sifive.com Cc: andybnac(a)gmail.com Cc: kito.cheng(a)sifive.com Cc: charlie(a)rivosinc.com Cc: atishp(a)rivosinc.com Cc: evan(a)rivosinc.com Cc: cleger(a)rivosinc.com Cc: alexghiti(a)rivosinc.com Cc: samitolvanen(a)google.com Cc: broonie(a)kernel.org Cc: rick.p.edgecombe(a)intel.com Signed-off-by: Deepak Gupta <debug(a)rivosinc.com> --- changelog --------- v6: - Picked up Samuel Holland's changes as is with `envcfg` placed in `thread` instead of `thread_info` - fixed unaligned newline escapes in kselftest - cleaned up messages in kselftest and included test output in commit message - fixed a bug in clone path reported by Zong Li - fixed a build issue if CONFIG_RISCV_ISA_V is not selected (this was introduced due to re-factoring signal context management code) v5: - rebased on v6.12-rc1 - Fixed schema related issues in device tree file - Fixed some of the documentation related issues in zicfilp/ss.rst (style issues and added index) - added `SHADOW_STACK_SET_MARKER` so that implementation can define base of shadow stack. - Fixed warnings on definitions added in usercfi.h when CONFIG_RISCV_USER_CFI is not selected. - Adopted context header based signal handling as proposed by Andy Chiu - Added support for enabling kernel mode access to shadow stack using FWFT (https://github.com/riscv-non-isa/riscv-sbi-doc/blob/master/src/ext-firmware…) - Link to v5: https://lore.kernel.org/r/20241001-v5_user_cfi_series-v1-0-3ba65b6e550f@riv… (Note: I had an issue in my workflow due to which version number wasn't picked up correctly while sending out patches) v4: - rebased on 6.11-rc6 - envcfg: Converged with Samuel Holland's patches for envcfg management on per- thread basis. - vma_is_shadow_stack is renamed to is_vma_shadow_stack - picked up Mark Brown's `ARCH_HAS_USER_SHADOW_STACK` patch - signal context: using extended context management to maintain compatibility. - fixed `-Wmissing-prototypes` compiler warnings for prctl functions - Documentation fixes and amending typos. - Link to v4: https://lore.kernel.org/all/20240912231650.3740732-1-debug@rivosinc.com/ v3: - envcfg logic to pick up base envcfg had a bug where `ENVCFG_CBZE` could have been picked on per task basis, even though CPU didn't implement it. Fixed in this series. - dt-bindings As suggested, split into separate commit. fixed the messaging that spec is in public review - arch_is_shadow_stack change arch_is_shadow_stack changed to vma_is_shadow_stack - hwprobe zicfiss / zicfilp if present will get enumerated in hwprobe - selftests As suggested, added object and binary filenames to .gitignore Selftest binary anyways need to be compiled with cfi enabled compiler which will make sure that landing pad and shadow stack are enabled. Thus removed separate enable/disable tests. Cleaned up tests a bit. - Link to v3: https://lore.kernel.org/lkml/20240403234054.2020347-1-debug@rivosinc.com/ v2: - Using config `CONFIG_RISCV_USER_CFI`, kernel support for riscv control flow integrity for user mode programs can be compiled in the kernel. - Enabling of control flow integrity for user programs is left to user runtime - This patch series introduces arch agnostic `prctls` to enable shadow stack and indirect branch tracking. And implements them on riscv. --- Andy Chiu (1): riscv: signal: abstract header saving for setup_sigcontext Clément Léger (1): riscv: Add Firmware Feature SBI extensions definitions Deepak Gupta (26): mm: helper `is_shadow_stack_vma` to check shadow stack vma riscv/Kconfig: enable HAVE_EXIT_THREAD for riscv dt-bindings: riscv: zicfilp and zicfiss in dt-bindings (extensions.yaml) riscv: zicfiss / zicfilp enumeration riscv: zicfiss / zicfilp extension csr and bit definitions riscv: usercfi state for task and save/restore of CSR_SSP on trap entry/exit riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE riscv mm: manufacture shadow stack pte riscv mmu: teach pte_mkwrite to manufacture shadow stack PTEs riscv mmu: write protect and shadow stack riscv/mm: Implement map_shadow_stack() syscall riscv/shstk: If needed allocate a new shadow stack on clone prctl: arch-agnostic prctl for indirect branch tracking riscv: Implements arch agnostic shadow stack prctls riscv: Implements arch agnostic indirect branch tracking prctls riscv/traps: Introduce software check exception riscv/signal: save and restore of shadow stack for signal riscv/kernel: update __show_regs to print shadow stack register riscv/ptrace: riscv cfi status and state via ptrace and in core files riscv/hwprobe: zicfilp / zicfiss enumeration in hwprobe riscv: enable kernel access to shadow stack memory via FWFT sbi call riscv: kernel command line option to opt out of user cfi riscv: create a config for shadow stack and landing pad instr support riscv: Documentation for landing pad / indirect branch tracking riscv: Documentation for shadow stack on riscv kselftest/riscv: kselftest for user mode cfi Mark Brown (2): mm: Introduce ARCH_HAS_USER_SHADOW_STACK prctl: arch-agnostic prctl for shadow stack Samuel Holland (3): riscv: Enable cbo.zero only when all harts support Zicboz riscv: Add support for per-thread envcfg CSR values riscv: Call riscv_user_isa_enable() only on the boot hart Documentation/arch/riscv/index.rst | 2 + Documentation/arch/riscv/zicfilp.rst | 115 +++++ Documentation/arch/riscv/zicfiss.rst | 176 +++++++ .../devicetree/bindings/riscv/extensions.yaml | 14 + arch/riscv/Kconfig | 21 + arch/riscv/include/asm/asm-prototypes.h | 1 + arch/riscv/include/asm/cpufeature.h | 15 +- arch/riscv/include/asm/csr.h | 16 + arch/riscv/include/asm/entry-common.h | 2 + arch/riscv/include/asm/hwcap.h | 2 + arch/riscv/include/asm/mman.h | 24 + arch/riscv/include/asm/pgtable.h | 30 +- arch/riscv/include/asm/processor.h | 3 + arch/riscv/include/asm/sbi.h | 27 ++ arch/riscv/include/asm/switch_to.h | 8 + arch/riscv/include/asm/thread_info.h | 3 + arch/riscv/include/asm/usercfi.h | 89 ++++ arch/riscv/include/asm/vector.h | 3 + arch/riscv/include/uapi/asm/hwprobe.h | 2 + arch/riscv/include/uapi/asm/ptrace.h | 22 + arch/riscv/include/uapi/asm/sigcontext.h | 1 + arch/riscv/kernel/Makefile | 2 + arch/riscv/kernel/asm-offsets.c | 8 + arch/riscv/kernel/cpufeature.c | 13 +- arch/riscv/kernel/entry.S | 31 +- arch/riscv/kernel/head.S | 12 + arch/riscv/kernel/process.c | 31 +- arch/riscv/kernel/ptrace.c | 83 ++++ arch/riscv/kernel/signal.c | 140 +++++- arch/riscv/kernel/smpboot.c | 2 - arch/riscv/kernel/suspend.c | 4 +- arch/riscv/kernel/sys_hwprobe.c | 2 + arch/riscv/kernel/sys_riscv.c | 10 + arch/riscv/kernel/traps.c | 42 ++ arch/riscv/kernel/usercfi.c | 526 +++++++++++++++++++++ arch/riscv/mm/init.c | 2 +- arch/riscv/mm/pgtable.c | 17 + arch/x86/Kconfig | 1 + fs/proc/task_mmu.c | 2 +- include/linux/cpu.h | 4 + include/linux/mm.h | 5 +- include/uapi/asm-generic/mman.h | 4 + include/uapi/linux/elf.h | 1 + include/uapi/linux/prctl.h | 48 ++ kernel/sys.c | 60 +++ mm/Kconfig | 6 + mm/gup.c | 2 +- mm/mmap.c | 1 + mm/vma.h | 10 +- tools/testing/selftests/riscv/Makefile | 2 +- tools/testing/selftests/riscv/cfi/.gitignore | 3 + tools/testing/selftests/riscv/cfi/Makefile | 10 + tools/testing/selftests/riscv/cfi/cfi_rv_test.h | 84 ++++ tools/testing/selftests/riscv/cfi/riscv_cfi_test.c | 78 +++ tools/testing/selftests/riscv/cfi/shadowstack.c | 373 +++++++++++++++ tools/testing/selftests/riscv/cfi/shadowstack.h | 37 ++ 56 files changed, 2190 insertions(+), 42 deletions(-) --- base-commit: 7d9923ee3960bdbfaa7f3a4e0ac2364e770c46ff change-id: 20240930-v5_user_cfi_series-3dc332f8f5b2 -- - debug

8 months

6
51
0 0

[PATCH bpf-next] selftests/bpf: Use make/remove netns helpers in mptcp

by Geliang Tang

From: Geliang Tang <tanggeliang(a)kylinos.cn> New netns selftest helpers make_netns() and remove_netns() has been added in network_helpers.c, let's use them in mptcp selftests too. Signed-off-by: Geliang Tang <tanggeliang(a)kylinos.cn> Reviewed-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- tools/testing/selftests/bpf/prog_tests/mptcp.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c index d2ca32fa3b21..8276398f7d6a 100644 --- a/tools/testing/selftests/bpf/prog_tests/mptcp.c +++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c @@ -66,12 +66,18 @@ struct mptcp_storage { static struct nstoken *create_netns(void) { - SYS(fail, "ip netns add %s", NS_TEST); - SYS(fail, "ip -net %s link set dev lo up", NS_TEST); + struct nstoken *nstoken; - return open_netns(NS_TEST); -fail: - return NULL; + if (make_netns(NS_TEST) < 0) + return NULL; + + nstoken = open_netns(NS_TEST); + if (!nstoken) { + log_err("open netns %s failed", NS_TEST); + remove_netns(NS_TEST); + } + + return nstoken; } static void cleanup_netns(struct nstoken *nstoken) @@ -79,7 +85,7 @@ static void cleanup_netns(struct nstoken *nstoken) if (nstoken) close_netns(nstoken); - SYS_NOFAIL("ip netns del %s", NS_TEST); + remove_netns(NS_TEST); } static int start_mptcp_server(int family, const char *addr_str, __u16 port, -- 2.45.2

8 months

2
1
0 0

[PATCH 0/9] arm64: Support 2024 dpISA extensions

by Mark Brown

The 2024 architecture release includes a number of data processing extensions, mostly SVE and SME additions with a few others. These are all very straightforward extensions which add instructions but no architectural state so only need hwcaps and exposing of the ID registers to KVM guests and userspace. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Mark Brown (9): arm64/sysreg: Update ID_AA64PFR2_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64ISAR3_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64FPFR0_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64ZFR0_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64SMFR0_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64ISAR2_EL1 to DDI0601 2024-09 arm64/hwcap: Describe 2024 dpISA extensions to userspace KVM: arm64: Allow control of dpISA extensions in ID_AA64ISAR3_EL1 kselftest/arm64: Add 2024 dpISA extensions to hwcap test Documentation/arch/arm64/elf_hwcaps.rst | 51 ++++++ arch/arm64/include/asm/hwcap.h | 17 ++ arch/arm64/include/uapi/asm/hwcap.h | 17 ++ arch/arm64/kernel/cpufeature.c | 35 ++++ arch/arm64/kernel/cpuinfo.c | 17 ++ arch/arm64/kvm/sys_regs.c | 3 +- arch/arm64/tools/sysreg | 87 +++++++++- tools/testing/selftests/arm64/abi/hwcap.c | 273 +++++++++++++++++++++++++++++- 8 files changed, 490 insertions(+), 10 deletions(-) --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241008-arm64-2024-dpisa-8091074a7f48 Best regards, -- Mark Brown <broonie(a)kernel.org>

8 months

2
11
0 0

[PATCH v2] selftests: tc-testing: Fix typo error

by Karan Sanghavi

Correct the typo errors in json files - "diffferent" is corrected to "different". - "muliple" and "miltiple" is corrected to "multiple". Reviewed-by: Simon Horman <horms(a)kernel.org> Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Karan Sanghavi <karansanghvi98(a)gmail.com> --- Changes in v2: - Rewrote short log and commit message - Link to v1: https://lore.kernel.org/r/20241019-multiple_spell_error-v1-1-facff43b5610@g… --- tools/testing/selftests/tc-testing/tc-tests/filters/basic.json | 6 +++--- tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json | 6 +++--- tools/testing/selftests/tc-testing/tc-tests/filters/flow.json | 2 +- tools/testing/selftests/tc-testing/tc-tests/filters/route.json | 2 +- 4 files changed, 8 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/tc-testing/tc-tests/filters/basic.json b/tools/testing/selftests/tc-testing/tc-tests/filters/basic.json index d1278de8ebc3..c9309a44a87e 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/filters/basic.json +++ b/tools/testing/selftests/tc-testing/tc-tests/filters/basic.json @@ -67,7 +67,7 @@ }, { "id": "4943", - "name": "Add basic filter with cmp ematch u32/link layer and miltiple actions", + "name": "Add basic filter with cmp ematch u32/link layer and multiple actions", "category": [ "filter", "basic" @@ -155,7 +155,7 @@ }, { "id": "32d8", - "name": "Add basic filter with cmp ematch u32/network layer and miltiple actions", + "name": "Add basic filter with cmp ematch u32/network layer and multiple actions", "category": [ "filter", "basic" @@ -243,7 +243,7 @@ }, { "id": "62d7", - "name": "Add basic filter with cmp ematch u32/transport layer and miltiple actions", + "name": "Add basic filter with cmp ematch u32/transport layer and multiple actions", "category": [ "filter", "basic" diff --git a/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json b/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json index 03723cf84379..35c9a7dbe1c4 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json +++ b/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json @@ -67,7 +67,7 @@ }, { "id": "0234", - "name": "Add cgroup filter with cmp ematch u32/link layer and miltiple actions", + "name": "Add cgroup filter with cmp ematch u32/link layer and multiple actions", "category": [ "filter", "cgroup" @@ -155,7 +155,7 @@ }, { "id": "2733", - "name": "Add cgroup filter with cmp ematch u32/network layer and miltiple actions", + "name": "Add cgroup filter with cmp ematch u32/network layer and multiple actions", "category": [ "filter", "cgroup" @@ -1189,7 +1189,7 @@ }, { "id": "4319", - "name": "Replace cgroup filter with diffferent match", + "name": "Replace cgroup filter with different match", "category": [ "filter", "cgroup" diff --git a/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json b/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json index 58189327f644..996448afe31b 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json +++ b/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json @@ -507,7 +507,7 @@ }, { "id": "4341", - "name": "Add flow filter with muliple ops", + "name": "Add flow filter with multiple ops", "category": [ "filter", "flow" diff --git a/tools/testing/selftests/tc-testing/tc-tests/filters/route.json b/tools/testing/selftests/tc-testing/tc-tests/filters/route.json index 8d8de8f65aef..05cedca67cca 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/filters/route.json +++ b/tools/testing/selftests/tc-testing/tc-tests/filters/route.json @@ -111,7 +111,7 @@ }, { "id": "7994", - "name": "Add route filter with miltiple actions", + "name": "Add route filter with multiple actions", "category": [ "filter", "route" --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241017-multiple_spell_error-8b267ffffe47 Best regards, -- Karan Sanghavi <karansanghvi98(a)gmail.com>

8 months

2
1
0 0

[PATCH 0/2] kselftest/arm64: fp-stress signal delivery interval improvements

by Mark Brown

One of the things that fp-stress does to stress the floating point context switching is send signals to the test threads it spawns. Currently we do this once per second but as suggested by Mark Rutland if we increase this we can improve the chances of triggering any issues with context switching the signal handling code. Do a quick change to increase the rate of signal delivery, trying to avoid excessive impact on emulated platforms, and a further change to mitigate the impact that this creates during startup. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Mark Brown (2): kselftest/arm64: Increase frequency of signal delivery in fp-stress kselftest/arm64: Lower poll interval while waiting for fp-stress children tools/testing/selftests/arm64/fp/fp-stress.c | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-) --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241028-arm64-fp-stress-interval-8f5e62c06e12 Best regards, -- Mark Brown <broonie(a)kernel.org>

8 months

2
5
0 0

[PATCH bpf-next v2] bpf: handle implicit declaration of function gettid in bpf_iter.c

by Jason Xing

From: Jason Xing <kernelxing(a)tencent.com> As we can see from the title, when I compiled the selftests/bpf, I saw the error: implicit declaration of function ‘gettid’ ; did you mean ‘getgid’? [-Werror=implicit-function-declaration] skel->bss->tid = gettid(); ^~~~~~ getgid Directly call the syscall solves this issue. Signed-off-by: Jason Xing <kernelxing(a)tencent.com> --- v2 Link: https://lore.kernel.org/all/20241028034143.14675-1-kerneljasonxing@gmail.co… 1. directly call the syscall (Andrii) --- tools/testing/selftests/bpf/prog_tests/bpf_iter.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c index f0a3a9c18e9e..9006549a1294 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c @@ -226,7 +226,7 @@ static void test_task_common_nocheck(struct bpf_iter_attach_opts *opts, ASSERT_OK(pthread_create(&thread_id, NULL, &do_nothing_wait, NULL), "pthread_create"); - skel->bss->tid = gettid(); + skel->bss->tid = syscall(SYS_gettid); do_dummy_read_opts(skel->progs.dump_task, opts); @@ -255,10 +255,10 @@ static void *run_test_task_tid(void *arg) union bpf_iter_link_info linfo; int num_unknown_tid, num_known_tid; - ASSERT_NEQ(getpid(), gettid(), "check_new_thread_id"); + ASSERT_NEQ(getpid(), syscall(SYS_gettid), "check_new_thread_id"); memset(&linfo, 0, sizeof(linfo)); - linfo.task.tid = gettid(); + linfo.task.tid = syscall(SYS_gettid); opts.link_info = &linfo; opts.link_info_len = sizeof(linfo); test_task_common(&opts, 0, 1); -- 2.37.3

8 months

3
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[PATCH v4 0/5] implement lightweight guard pages

by Lorenzo Stoakes

Userland library functions such as allocators and threading implementations often require regions of memory to act as 'guard pages' - mappings which, when accessed, result in a fatal signal being sent to the accessing process. The current means by which these are implemented is via a PROT_NONE mmap() mapping, which provides the required semantics however incur an overhead of a VMA for each such region. With a great many processes and threads, this can rapidly add up and incur a significant memory penalty. It also has the added problem of preventing merges that might otherwise be permitted. This series takes a different approach - an idea suggested by Vlasimil Babka (and before him David Hildenbrand and Jann Horn - perhaps more - the provenance becomes a little tricky to ascertain after this - please forgive any omissions!) - rather than locating the guard pages at the VMA layer, instead placing them in page tables mapping the required ranges. Early testing of the prototype version of this code suggests a 5 times speed up in memory mapping invocations (in conjunction with use of process_madvise()) and a 13% reduction in VMAs on an entirely idle android system and unoptimised code. We expect with optimisation and a loaded system with a larger number of guard pages this could significantly increase, but in any case these numbers are encouraging. This way, rather than having separate VMAs specifying which parts of a range are guard pages, instead we have a VMA spanning the entire range of memory a user is permitted to access and including ranges which are to be 'guarded'. After mapping this, a user can specify which parts of the range should result in a fatal signal when accessed. By restricting the ability to specify guard pages to memory mapped by existing VMAs, we can rely on the mappings being torn down when the mappings are ultimately unmapped and everything works simply as if the memory were not faulted in, from the point of view of the containing VMAs. This mechanism in effect poisons memory ranges similar to hardware memory poisoning, only it is an entirely software-controlled form of poisoning. The mechanism is implemented via madvise() behaviour - MADV_GUARD_INSTALL which installs page table-level guard page markers - and MADV_GUARD_REMOVE - which clears them. Guard markers can be installed across multiple VMAs and any existing mappings will be cleared, that is zapped, before installing the guard page markers in the page tables. There is no concept of 'nested' guard markers, multiple attempts to install guard markers in a range will, after the first attempt, have no effect. Importantly, removing guard markers over a range that contains both guard markers and ordinary backed memory has no effect on anything but the guard markers (including leaving huge pages un-split), so a user can safely remove guard markers over a range of memory leaving the rest intact. The actual mechanism by which the page table entries are specified makes use of existing logic - PTE markers, which are used for the userfaultfd UFFDIO_POISON mechanism. Unfortunately PTE_MARKER_POISONED is not suited for the guard page mechanism as it results in VM_FAULT_HWPOISON semantics in the fault handler, so we add our own specific PTE_MARKER_GUARD and adapt existing logic to handle it. We also extend the generic page walk mechanism to allow for installation of PTEs (carefully restricted to memory management logic only to prevent unwanted abuse). We ensure that zapping performed by MADV_DONTNEED and MADV_FREE do not remove guard markers, nor does forking (except when VM_WIPEONFORK is specified for a VMA which implies a total removal of memory characteristics). It's important to note that the guard page implementation is emphatically NOT a security feature, so a user can remove the markers if they wish. We simply implement it in such a way as to provide the least surprising behaviour. An extensive set of self-tests are provided which ensure behaviour is as expected and additionally self-documents expected behaviour of guard ranges. Suggested-by: Vlastimil Babka <vbabka(a)suse.cz> Suggested-by: Jann Horn <jannh(a)google.com> Suggested-by: David Hildenbrand <david(a)redhat.com> v4 * Use restart_syscall() to implement -ERESTARTNOINTR to ensure correctly handled by kernel - tested this code path and confirmed it works correctly. Thanks to Vlastimil for pointing this issue out! * Updated the vector_madvise() handler to not unnecessarily invoke cond_resched() as suggested by Vlastimil. * Updated guard page tests to add a test for a vector operation which overwrites existing mappings. Tested this against the -ERESTARTNOINTR case and confirmed working. * Improved page walk logic further, refactoring handling logic as suggested by Vlastimil. * Moved MAX_MADVISE_GUARD_RETRIES to mm/madvise.c as suggested by Vlastimil. v3 * Cleaned up mm/pagewalk.c logic a bit to make things clearer, as suggested by Vlastiml. * Explicitly avoid splitting THP on PTE installation, as suggested by Vlastimil. Note this has no impact on the guard pages logic, which has page table entry handlers at PUD, PMD and PTE level. * Added WARN_ON_ONCE() to mm/hugetlb.c path where we don't expect a guard marker, as suggested by Vlastimil. * Reverted change to is_poisoned_swp_entry() to exclude guard pages which has the effect of MADV_FREE _not_ clearing guard pages. After discussion with Vlastimil, it became apparent that the ability to 'cancel' the freeing operation by writing to the mapping after having issued an MADV_FREE would mean that we would risk unexpected behaviour should the guard pages be removed, so we now do not remove markers here at all. * Added comment to PTE_MARKER_GUARD to highlight that memory tagged with the marker behaves as if it were a region mapped PROT_NONE, as highlighted by David. * Rename poison -> install, unpoison -> remove (i.e. MADV_GUARD_INSTALL / MADV_GUARD_REMOVE over MADV_GUARD_POISON / MADV_GUARD_REMOVE) at the request of David and John who both find the poison analogy confusing/overloaded. * After a lot of discussion, replace the looping behaviour should page faults race with guard page installation with a modest reattempt followed by returning -ERESTARTNOINTR to have the operation abort and re-enter, relieving lock contention and avoiding the possibility of allowing a malicious sandboxed process to impact the mmap lock or stall the overall process more than necessary, as suggested by Jann and Vlastimil having raised the issue. * Adjusted the page table walker so a populated huge PUD or PMD is correctly treated as being populated, necessitating a zap. In v2 we incorrectly skipped over these, which would cause the logic to wrongly proceed as if nothing were populated and the install succeeded. Instead, explicitly check to see if a huge page - if so, do not split but rather abort the operation and let zap take care of things. * Updated the guard remove logic to not unnecessarily split huge pages either. * Added a debug check to assert that the number of installed PTEs matches expectation, accounting for any existing guard pages. * Adapted vector_madvise() used by the process_madvise() system call to handle -ERESTARTNOINTR correctly. https://lore.kernel.org/all/cover.1729699916.git.lorenzo.stoakes@oracle.com/ v2 * The macros in kselftest_harness.h seem to be broken - __EXPECT() is terminated by '} while (0); OPTIONAL_HANDLER(_assert)' meaning it is not safe in single line if / else or for /which blocks, however working around this results in checkpatch producing invalid warnings, as reported by Shuah. * Fixing these macros is out of scope for this series, so compromise and instead rewrite test blocks so as to use multiple lines by separating out a decl in most cases. This has the side effect of, for the most part, making things more readable. * Heavily document the use of the volatile keyword - we can't avoid checkpatch complaining about this, so we explain it, as reported by Shuah. * Updated commit message to highlight that we skip tests we lack permissions for, as reported by Shuah. * Replaced a perror() with ksft_exit_fail_perror(), as reported by Shuah. * Added user friendly messages to cases where tests are skipped due to lack of permissions, as reported by Shuah. * Update the tool header to include the new MADV_GUARD_POISON/UNPOISON defines and directly include asm-generic/mman.h to get the platform-neutral versions to ensure we import them. * Finally fixed Vlastimil's email address in Suggested-by tags from suze to suse, as reported by Vlastimil. * Added linux-api to cc list, as reported by Vlastimil. https://lore.kernel.org/all/cover.1729440856.git.lorenzo.stoakes@oracle.com/ v1 * Un-RFC'd as appears no major objections to approach but rather debate on implementation. * Fixed issue with arches which need mmu_context.h and tlbfush.h. header imports in pagewalker logic to be able to use update_mmu_cache() as reported by the kernel test bot. * Added comments in page walker logic to clarify who can use ops->install_pte and why as well as adding a check_ops_valid() helper function, as suggested by Christoph. * Pass false in full parameter in pte_clear_not_present_full() as suggested by Jann. * Stopped erroneously requiring a write lock for the poison operation as suggested by Jann and Suren. * Moved anon_vma_prepare() to the start of madvise_guard_poison() to be consistent with how this is used elsewhere in the kernel as suggested by Jann. * Avoid returning -EAGAIN if we are raced on page faults, just keep looping and duck out if a fatal signal is pending or a conditional reschedule is needed, as suggested by Jann. * Avoid needlessly splitting huge PUDs and PMDs by specifying ACTION_CONTINUE, as suggested by Jann. https://lore.kernel.org/all/cover.1729196871.git.lorenzo.stoakes@oracle.com/ RFC https://lore.kernel.org/all/cover.1727440966.git.lorenzo.stoakes@oracle.com/ Lorenzo Stoakes (5): mm: pagewalk: add the ability to install PTEs mm: add PTE_MARKER_GUARD PTE marker mm: madvise: implement lightweight guard page mechanism tools: testing: update tools UAPI header for mman-common.h selftests/mm: add self tests for guard page feature arch/alpha/include/uapi/asm/mman.h | 3 + arch/mips/include/uapi/asm/mman.h | 3 + arch/parisc/include/uapi/asm/mman.h | 3 + arch/xtensa/include/uapi/asm/mman.h | 3 + include/linux/mm_inline.h | 2 +- include/linux/pagewalk.h | 18 +- include/linux/swapops.h | 24 +- include/uapi/asm-generic/mman-common.h | 3 + mm/hugetlb.c | 4 + mm/internal.h | 6 + mm/madvise.c | 239 ++++ mm/memory.c | 18 +- mm/mprotect.c | 6 +- mm/mseal.c | 1 + mm/pagewalk.c | 246 +++- tools/include/uapi/asm-generic/mman-common.h | 3 + tools/testing/selftests/mm/.gitignore | 1 + tools/testing/selftests/mm/Makefile | 1 + tools/testing/selftests/mm/guard-pages.c | 1243 ++++++++++++++++++ 19 files changed, 1751 insertions(+), 76 deletions(-) create mode 100644 tools/testing/selftests/mm/guard-pages.c -- 2.47.0

8 months

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[PATCH net-next v10 00/23] Introducing OpenVPN Data Channel Offload

by Antonio Quartulli

Notable changes from v9: * fixed potential deadlock between peer float and keepalive worker * simplified skb CB layout to avoid allocating large mem area per pkt * fixed double free along encryption/decryption error path * fixed crash due to race condition in keepalive worker for p2p mode * mitigated race condition between TCP socket init and first strp rcv * added CMD_OVPN_KEY_GET doit handler (it went missing in v9) * removed double 'select STREAM_PARSER' in Kconfig * removed double include of socket.h in io.c * sorted new OVPN section in MAINTAINERS alphabetically * sorted F: entries in MAINTAINERS alphabetically * switched to state "Supported" in MAINTAINERS * added ending newline to various error messages in ovpn-cli.c * rearranged ovpn-cli.c for better readability and maintenance * ovpn-cli.c now compiles with -Wextra -Wall -pedantic * renamed selftest scripts * test-float.sh is now a stub that just calls test.sh with appropriate params Please note that patches previously reviewed by Andrew Lunn have retained the Reviewed-by tag as they have been simply rebased without major modifications. The latest code can also be found at: https://github.com/OpenVPN/linux-kernel-ovpn Thanks a lot! Best Regards, Antonio Quartulli OpenVPN Inc. --- Antonio Quartulli (23): netlink: add NLA_POLICY_MAX_LEN macro net: introduce OpenVPN Data Channel Offload (ovpn) ovpn: add basic netlink support ovpn: add basic interface creation/destruction/management routines ovpn: keep carrier always on ovpn: introduce the ovpn_peer object ovpn: introduce the ovpn_socket object ovpn: implement basic TX path (UDP) ovpn: implement basic RX path (UDP) ovpn: implement packet processing ovpn: store tunnel and transport statistics ovpn: implement TCP transport ovpn: implement multi-peer support ovpn: implement peer lookup logic ovpn: implement keepalive mechanism ovpn: add support for updating local UDP endpoint ovpn: add support for peer floating ovpn: implement peer add/get/dump/delete via netlink ovpn: implement key add/get/del/swap via netlink ovpn: kill key and notify userspace in case of IV exhaustion ovpn: notify userspace when a peer is deleted ovpn: add basic ethtool support testing/selftests: add test tool and scripts for ovpn module Documentation/netlink/specs/ovpn.yaml | 362 +++ MAINTAINERS | 11 + drivers/net/Kconfig | 14 + drivers/net/Makefile | 1 + drivers/net/ovpn/Makefile | 22 + drivers/net/ovpn/bind.c | 54 + drivers/net/ovpn/bind.h | 117 + drivers/net/ovpn/crypto.c | 214 ++ drivers/net/ovpn/crypto.h | 145 ++ drivers/net/ovpn/crypto_aead.c | 386 ++++ drivers/net/ovpn/crypto_aead.h | 33 + drivers/net/ovpn/io.c | 462 ++++ drivers/net/ovpn/io.h | 25 + drivers/net/ovpn/main.c | 337 +++ drivers/net/ovpn/main.h | 24 + drivers/net/ovpn/netlink-gen.c | 212 ++ drivers/net/ovpn/netlink-gen.h | 41 + drivers/net/ovpn/netlink.c | 1135 ++++++++++ drivers/net/ovpn/netlink.h | 18 + drivers/net/ovpn/ovpnstruct.h | 61 + drivers/net/ovpn/packet.h | 40 + drivers/net/ovpn/peer.c | 1201 ++++++++++ drivers/net/ovpn/peer.h | 165 ++ drivers/net/ovpn/pktid.c | 130 ++ drivers/net/ovpn/pktid.h | 87 + drivers/net/ovpn/proto.h | 104 + drivers/net/ovpn/skb.h | 56 + drivers/net/ovpn/socket.c | 178 ++ drivers/net/ovpn/socket.h | 55 + drivers/net/ovpn/stats.c | 21 + drivers/net/ovpn/stats.h | 47 + drivers/net/ovpn/tcp.c | 506 +++++ drivers/net/ovpn/tcp.h | 44 + drivers/net/ovpn/udp.c | 406 ++++ drivers/net/ovpn/udp.h | 26 + include/net/netlink.h | 1 + include/uapi/linux/if_link.h | 15 + include/uapi/linux/ovpn.h | 109 + include/uapi/linux/udp.h | 1 + tools/net/ynl/ynl-gen-c.py | 4 +- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/net/ovpn/.gitignore | 2 + tools/testing/selftests/net/ovpn/Makefile | 17 + tools/testing/selftests/net/ovpn/config | 10 + tools/testing/selftests/net/ovpn/data64.key | 5 + tools/testing/selftests/net/ovpn/ovpn-cli.c | 2370 ++++++++++++++++++++ tools/testing/selftests/net/ovpn/tcp_peers.txt | 5 + .../testing/selftests/net/ovpn/test-chachapoly.sh | 9 + tools/testing/selftests/net/ovpn/test-float.sh | 9 + tools/testing/selftests/net/ovpn/test-tcp.sh | 9 + tools/testing/selftests/net/ovpn/test.sh | 183 ++ tools/testing/selftests/net/ovpn/udp_peers.txt | 5 + 52 files changed, 9494 insertions(+), 1 deletion(-) --- base-commit: 03fc07a24735e0be8646563913abf5f5cb71ad19 change-id: 20241002-b4-ovpn-eeee35c694a2 Best regards, -- Antonio Quartulli <antonio(a)openvpn.net>

8 months

4
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[PATCH net-next 1/2] net: netconsole: selftests: Change the IP subnet

by Breno Leitao

Use a less populated IP range to run the tests, as suggested by Petr in Link: https://lore.kernel.org/netdev/87ikvukv3s.fsf@nvidia.com/. Suggested-by: Petr Machata <petrm(a)nvidia.com> Signed-off-by: Breno Leitao <leitao(a)debian.org> --- tools/testing/selftests/drivers/net/netcons_basic.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/drivers/net/netcons_basic.sh b/tools/testing/selftests/drivers/net/netcons_basic.sh index 06021b2059b7..4ad1e216c6b0 100755 --- a/tools/testing/selftests/drivers/net/netcons_basic.sh +++ b/tools/testing/selftests/drivers/net/netcons_basic.sh @@ -20,9 +20,9 @@ SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")") # Simple script to test dynamic targets in netconsole SRCIF="" # to be populated later -SRCIP=192.168.1.1 +SRCIP=192.168.2.1 DSTIF="" # to be populated later -DSTIP=192.168.1.2 +DSTIP=192.168.2.2 PORT="6666" MSG="netconsole selftest" -- 2.43.5

8 months

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kselftest/next kselftest-lib: 1 runs, 1 regressions (v6.12-rc3-8-gcecc795329fc)

by kernelci.org bot

kselftest/next kselftest-lib: 1 runs, 1 regressions (v6.12-rc3-8-gcecc795329fc) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.12-rc3-8-gcec… Test: kselftest-lib Tree: kselftest Branch: next Describe: v6.12-rc3-8-gcecc795329fc URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: cecc795329fc3e0ea2e84567ee57570cc050cf6b Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6720a485c2f02871e7c86857 Results: 0 PASS, 1 FAIL, 0 SKIP Full config: multi_v7_defconfig+kselftest Compiler: gcc-12 (arm-linux-gnueabihf-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/next/v6.12-rc3-8-gcecc795329fc/arm/… HTML log: https://storage.kernelci.org//kselftest/next/v6.12-rc3-8-gcecc795329fc/arm/… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-lib.login: https://kernelci.org/test/case/id/6720a485c2f02871e7c86858 failing since 91 days (last pass: v6.10-rc7-29-gdf09b0bb09ea, first fail: v6.11-rc1)

8 months

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kselftest/next kselftest-lkdtm: 1 runs, 1 regressions (v6.12-rc3-8-gcecc795329fc)

by kernelci.org bot

kselftest/next kselftest-lkdtm: 1 runs, 1 regressions (v6.12-rc3-8-gcecc795329fc) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/v6.12-rc3-8-gcec… Test: kselftest-lkdtm Tree: kselftest Branch: next Describe: v6.12-rc3-8-gcecc795329fc URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: cecc795329fc3e0ea2e84567ee57570cc050cf6b Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/6720a2196a6ed469cec8688c Results: 0 PASS, 1 FAIL, 0 SKIP Full config: multi_v7_defconfig+kselftest Compiler: gcc-12 (arm-linux-gnueabihf-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/next/v6.12-rc3-8-gcecc795329fc/arm/… HTML log: https://storage.kernelci.org//kselftest/next/v6.12-rc3-8-gcecc795329fc/arm/… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-lkdtm.login: https://kernelci.org/test/case/id/6720a2196a6ed469cec8688d failing since 91 days (last pass: v6.10-rc7-29-gdf09b0bb09ea, first fail: v6.11-rc1)

8 months

1
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[PATCH net-next v2 2/2] net: netconsole: selftests: Add userdata validation

by Breno Leitao

Extend netcons_basic selftest to verify the userdata functionality by: 1. Creating a test key in the userdata configfs directory 2. Writing a known value to the key 3. Validating the key-value pair appears in the captured network output This ensures the userdata feature is properly tested during selftests. Signed-off-by: Breno Leitao <leitao(a)debian.org> --- .../selftests/drivers/net/netcons_basic.sh | 29 +++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/tools/testing/selftests/drivers/net/netcons_basic.sh b/tools/testing/selftests/drivers/net/netcons_basic.sh index 8d28e5189e91..182eb1a97e59 100755 --- a/tools/testing/selftests/drivers/net/netcons_basic.sh +++ b/tools/testing/selftests/drivers/net/netcons_basic.sh @@ -26,10 +26,13 @@ DSTIP=192.0.2.2 PORT="6666" MSG="netconsole selftest" +USERDATA_KEY="key" +USERDATA_VALUE="value" TARGET=$(mktemp -u netcons_XXXXX) DEFAULT_PRINTK_VALUES=$(cat /proc/sys/kernel/printk) NETCONS_CONFIGFS="/sys/kernel/config/netconsole" NETCONS_PATH="${NETCONS_CONFIGFS}"/"${TARGET}" +KEY_PATH="${NETCONS_PATH}/userdata/${USERDATA_KEY}" # NAMESPACE will be populated by setup_ns with a random value NAMESPACE="" @@ -122,6 +125,8 @@ function cleanup() { # delete netconsole dynamic reconfiguration echo 0 > "${NETCONS_PATH}"/enabled + # Remove key + rmdir "${KEY_PATH}" # Remove the configfs entry rmdir "${NETCONS_PATH}" @@ -136,6 +141,18 @@ function cleanup() { echo "${DEFAULT_PRINTK_VALUES}" > /proc/sys/kernel/printk } +function set_user_data() { + if [[ ! -d "${NETCONS_PATH}""/userdata" ]] + then + echo "Userdata path not available in ${NETCONS_PATH}/userdata" + exit "${ksft_skip}" + fi + + mkdir -p "${KEY_PATH}" + VALUE_PATH="${KEY_PATH}""/value" + echo "${USERDATA_VALUE}" > "${VALUE_PATH}" +} + function listen_port_and_save_to() { local OUTPUT=${1} # Just wait for 2 seconds @@ -146,6 +163,10 @@ function listen_port_and_save_to() { function validate_result() { local TMPFILENAME="$1" + # TMPFILENAME will contain something like: + # 6.11.1-0_fbk0_rc13_509_g30d75cea12f7,13,1822,115075213798,-;netconsole selftest: netcons_gtJHM + # key=value + # Check if the file exists if [ ! -f "$TMPFILENAME" ]; then echo "FAIL: File was not generated." >&2 @@ -158,6 +179,12 @@ function validate_result() { exit "${ksft_fail}" fi + if ! grep -q "${USERDATA_KEY}=${USERDATA_VALUE}" "${TMPFILENAME}"; then + echo "FAIL: ${USERDATA_KEY}=${USERDATA_VALUE} not found in ${TMPFILENAME}" >&2 + cat "${TMPFILENAME}" >&2 + exit "${ksft_fail}" + fi + # Delete the file once it is validated, otherwise keep it # for debugging purposes rm "${TMPFILENAME}" @@ -220,6 +247,8 @@ trap cleanup EXIT set_network # Create a dynamic target for netconsole create_dynamic_target +# Set userdata "key" with the "value" value +set_user_data # Listed for netconsole port inside the namespace and destination interface listen_port_and_save_to "${OUTPUT_FILE}" & # Wait for socat to start and listen to the port. -- 2.43.5

8 months

1
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[PATCH net-next v2 1/2] net: netconsole: selftests: Change the IP subnet

by Breno Leitao

Use a less populated IP range to run the tests, as suggested by Petr in Link: https://lore.kernel.org/netdev/87ikvukv3s.fsf@nvidia.com/. Suggested-by: Petr Machata <petrm(a)nvidia.com> Signed-off-by: Breno Leitao <leitao(a)debian.org> --- tools/testing/selftests/drivers/net/netcons_basic.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/drivers/net/netcons_basic.sh b/tools/testing/selftests/drivers/net/netcons_basic.sh index 06021b2059b7..8d28e5189e91 100755 --- a/tools/testing/selftests/drivers/net/netcons_basic.sh +++ b/tools/testing/selftests/drivers/net/netcons_basic.sh @@ -20,9 +20,9 @@ SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")") # Simple script to test dynamic targets in netconsole SRCIF="" # to be populated later -SRCIP=192.168.1.1 +SRCIP=192.0.2.1 DSTIF="" # to be populated later -DSTIP=192.168.1.2 +DSTIP=192.0.2.2 PORT="6666" MSG="netconsole selftest" -- 2.43.5

8 months

1
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kselftest/next build: 6 builds: 2 failed, 4 passed, 1 warning (v6.12-rc3-8-gcecc795329fc)

by kernelci.org bot

kselftest/next build: 6 builds: 2 failed, 4 passed, 1 warning (v6.12-rc3-8-gcecc795329fc) Full Build Summary: https://kernelci.org/build/kselftest/branch/next/kernel/v6.12-rc3-8-gcecc79… Tree: kselftest Branch: next Git Describe: v6.12-rc3-8-gcecc795329fc Git Commit: cecc795329fc3e0ea2e84567ee57570cc050cf6b Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 --- For more info write to <info(a)kernelci.org>

8 months

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[RESEND] [PATCH v6 0/2] Add test to distinguish between thread's signal mask and ucontext_t

by Dev Jain

This patch series is motivated by the following observation: Raise a signal, jump to signal handler. The ucontext_t structure dumped by kernel to userspace has a uc_sigmask field having the mask of blocked signals. If you run a fresh minimalistic program doing this, this field is empty, even if you block some signals while registering the handler with sigaction(). Here is what the man-pages have to say: sigaction(2): "sa_mask specifies a mask of signals which should be blocked (i.e., added to the signal mask of the thread in which the signal handler is invoked) during execution of the signal handler. In addition, the signal which triggered the handler will be blocked, unless the SA_NODEFER flag is used." signal(7): Under "Execution of signal handlers", (1.3) implies: "The thread's current signal mask is accessible via the ucontext_t object that is pointed to by the third argument of the signal handler." But, (1.4) states: "Any signals specified in act->sa_mask when registering the handler with sigprocmask(2) are added to the thread's signal mask. The signal being delivered is also added to the signal mask, unless SA_NODEFER was specified when registering the handler. These signals are thus blocked while the handler executes." There clearly is no distinction being made in the man pages between "Thread's signal mask" and ucontext_t; this logically should imply that a signal blocked by populating struct sigaction should be visible in ucontext_t. Here is what the kernel code does (for Aarch64): do_signal() -> handle_signal() -> sigmask_to_save(), which returns &current->blocked, is passed to setup_rt_frame() -> setup_sigframe() -> __copy_to_user(). Hence, &current->blocked is copied to ucontext_t exposed to userspace. Returning back to handle_signal(), signal_setup_done() -> signal_delivered() -> sigorsets() and set_current_blocked() are responsible for using information from struct ksignal ksig, which was populated through the sigaction() system call in kernel/signal.c: copy_from_user(&new_sa.sa, act, sizeof(new_sa.sa)), to update &current->blocked; hence, the set of blocked signals for the current thread is updated AFTER the kernel dumps ucontext_t to userspace. Assuming that the above is indeed the intended behaviour, because it semantically makes sense, since the signals blocked using sigaction() remain blocked only till the execution of the handler, and not in the context present before jumping to the handler (but nothing can be confirmed from the man-pages), the series introduces a test for mangling with uc_sigmask. I will send a separate series to fix the man-pages. The proposed selftest has been tested out on Aarch32, Aarch64 and x86_64. v5->v6: - Drop renaming of sas.c - Include the explanation from the cover letter in the changelog for the second patch v4->v5: - Remove a redundant print statement v3->v4: - Allocate sigsets as automatic variables to avoid malloc() v2->v3: - ucontext describes current state -> ucontext describes interrupted context - Add a comment for blockage of USR2 even after return from handler - Describe blockage of signals in a better way v1->v2: - Replace all occurrences of SIGPIPE with SIGSEGV - Fixed a mismatch between code comment and ksft log - Add a testcase: Raise the same signal again; it must not be queued - Remove unneeded <assert.h>, <unistd.h> - Give a detailed test description in the comments; also describe the exact meaning of delivered and blocked - Handle errors for all libc functions/syscalls - Mention tests in Makefile and .gitignore in alphabetical order v1: - https://lore.kernel.org/all/20240607122319.768640-1-dev.jain@arm.com/ Dev Jain (2): selftests: Rename sigaltstack to generic signal selftests: Add a test mangling with uc_sigmask tools/testing/selftests/Makefile | 2 +- .../{sigaltstack => signal}/.gitignore | 1 + .../{sigaltstack => signal}/Makefile | 3 +- .../current_stack_pointer.h | 0 .../selftests/signal/mangle_uc_sigmask.c | 184 ++++++++++++++++++ .../selftests/{sigaltstack => signal}/sas.c | 0 6 files changed, 188 insertions(+), 2 deletions(-) rename tools/testing/selftests/{sigaltstack => signal}/.gitignore (70%) rename tools/testing/selftests/{sigaltstack => signal}/Makefile (56%) rename tools/testing/selftests/{sigaltstack => signal}/current_stack_pointer.h (100%) create mode 100644 tools/testing/selftests/signal/mangle_uc_sigmask.c rename tools/testing/selftests/{sigaltstack => signal}/sas.c (100%) -- 2.30.2

8 months

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kselftest/fixes build: 6 builds: 2 failed, 4 passed, 1 warning (linux_kselftest-fixes-6.12-rc4-4-gdc1308bee1ed)

by kernelci.org bot

kselftest/fixes build: 6 builds: 2 failed, 4 passed, 1 warning (linux_kselftest-fixes-6.12-rc4-4-gdc1308bee1ed) Full Build Summary: https://kernelci.org/build/kselftest/branch/fixes/kernel/linux_kselftest-fi… Tree: kselftest Branch: fixes Git Describe: linux_kselftest-fixes-6.12-rc4-4-gdc1308bee1ed Git Commit: dc1308bee1ed03b4d698d77c8bd670d399dcd04d Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest (arm64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 --- For more info write to <info(a)kernelci.org>

8 months

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[PATCH] selftests/watchdog-test: Fix system accidentally reset after watchdog-test

by Li Zhijian

When running watchdog-test with 'make run_tests', the watchdog-test will be terminated by a timeout signal(SIGTERM) due to the test timemout. And then, a system reboot would happen due to watchdog not stop. see the dmesg as below: ``` [ 1367.185172] watchdog: watchdog0: watchdog did not stop! ``` Fix it by registering more signals(including SIGTERM) in watchdog-test, where its signal handler will stop the watchdog. After that # timeout 1 ./watchdog-test Watchdog Ticking Away! . Stopping watchdog ticks... Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> --- tools/testing/selftests/watchdog/watchdog-test.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c index bc71cbca0dde..a1f506ba5578 100644 --- a/tools/testing/selftests/watchdog/watchdog-test.c +++ b/tools/testing/selftests/watchdog/watchdog-test.c @@ -334,7 +334,13 @@ int main(int argc, char *argv[]) printf("Watchdog Ticking Away!\n"); + /* + * Register the signals + */ signal(SIGINT, term); + signal(SIGTERM, term); + signal(SIGKILL, term); + signal(SIGQUIT, term); while (1) { keep_alive(); -- 2.44.0

8 months

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[PATCH 0/2] selftests/intel_pstate: fix arithmetic expression and cpupower

by Alessandro Zanni

Address issues related to arithmetic expression compatibility and cpupower operand expected. Command to test: make kselftest TARGETS=intel_pstate Alessandro Zanni (2): selftests/intel_pstate: fix operand expected selftests/intel_pstate: cpupower command not found tools/testing/selftests/intel_pstate/run.sh | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) -- 2.43.0

8 months

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[PATCH for-next 1/3] selftests/watchdog: add count parameter for watchdog-test

by Li Zhijian

Currently, watchdog-test keep running until it gets a SIGINT. However, when watchdog-test is executed from the kselftests framework, where it launches test via timeout which will send SIGTERM in time up. This could lead to 1. watchdog haven't stop, a watchdog reset is triggered to reboot the OS in silent. 2. kselftests gets an timeout exit code, and judge watchdog-test as 'not ok' This patch is prepare to fix above 2 issues Signed-off-by: Li Zhijian <lizhijian(a)fujitsu.com> --- Hey, Cover letter is here. It's notice that a OS reboot was triggerred after ran the watchdog-test in kselftests framwork 'make run_tests', that's because watchdog-test didn't stop feeding the watchdog after enable it. In addition, current watchdog-test didn't adapt to the kselftests framework which launchs the test with /usr/bin/timeout and no timeout is expected. --- tools/testing/selftests/watchdog/watchdog-test.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c index bc71cbca0dde..2f8fd2670897 100644 --- a/tools/testing/selftests/watchdog/watchdog-test.c +++ b/tools/testing/selftests/watchdog/watchdog-test.c @@ -27,7 +27,7 @@ int fd; const char v = 'V'; -static const char sopts[] = "bdehp:st:Tn:NLf:i"; +static const char sopts[] = "bdehp:st:Tn:NLf:c:i"; static const struct option lopts[] = { {"bootstatus", no_argument, NULL, 'b'}, {"disable", no_argument, NULL, 'd'}, @@ -42,6 +42,7 @@ static const struct option lopts[] = { {"gettimeleft", no_argument, NULL, 'L'}, {"file", required_argument, NULL, 'f'}, {"info", no_argument, NULL, 'i'}, + {"count", required_argument, NULL, 'c'}, {NULL, no_argument, NULL, 0x0} }; @@ -95,6 +96,7 @@ static void usage(char *progname) printf(" -n, --pretimeout=T\tSet the pretimeout to T seconds\n"); printf(" -N, --getpretimeout\tGet the pretimeout\n"); printf(" -L, --gettimeleft\tGet the time left until timer expires\n"); + printf(" -c, --count\tStop after feeding the watchdog count times\n"); printf("\n"); printf("Parameters are parsed left-to-right in real-time.\n"); printf("Example: %s -d -t 10 -p 5 -e\n", progname); @@ -174,7 +176,7 @@ int main(int argc, char *argv[]) unsigned int ping_rate = DEFAULT_PING_RATE; int ret; int c; - int oneshot = 0; + int oneshot = 0, stop = 1, count = 0; char *file = "/dev/watchdog"; struct watchdog_info info; int temperature; @@ -307,6 +309,9 @@ int main(int argc, char *argv[]) else printf("WDIOC_GETTIMELEFT error '%s'\n", strerror(errno)); break; + case 'c': + stop = 0; + count = strtoul(optarg, NULL, 0); case 'f': /* Handled above */ break; @@ -336,8 +341,8 @@ int main(int argc, char *argv[]) signal(SIGINT, term); - while (1) { - keep_alive(); + while (stop || count--) { + exit_code = keep_alive(); sleep(ping_rate); } end: -- 2.44.0

8 months

3
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[PATCH v3] selftests: tmpfs: Add kselftest support to tmpfs

by Shivam Chaudhary

Add kselftest support for openat, linkat, unshare, mount tests - Replace direct error handling with 'ksft_test_result_*' , 'ksft_print_msg' macros for better reporting. - Add `ksft_print_header()` and `ksft_set_plan()` to structure test outputs more effectively. - Improve the test flow by adding more detailed pass/fail reporting for unshare, mounting, file opening, and linking operations. - Skip the test if it's not run as root, providing an appropriate Warning. Test logs: Before change: - Without root error: unshare, errno 1 - With root No, output After change: - Without root TAP version 13 1..1 ok 1 # SKIP This test needs root to run - With root TAP version 13 1..1 unshare(): Creat new mount namespace: Success. mount(): Root filesystem private mount: Success mount(): Mounting tmpfs on /tmp: Success openat(): Open first temporary file: Success linkat(): Linking the temporary file: Success openat(): Opening the second temporary file: Success ok 1 Test : Success Totals: pass:1 fail:0 xfail:0 xpass:0 skip:0 error:0 Signed-off-by: Shivam Chaudhary <cvam0000(a)gmail.com> --- Notes: Changes in v3: - Remove extra ksft_set_plan() - Remove function for unshare() - Fix the comment style link to v2: https://lore.kernel.org/all/20241026191621.2860376-1-cvam0000@gmail.com/ Changes in v2: - Make the commit message more clear. link to v1: https://lore.kernel.org/all/20241024200228.1075840-1-cvam0000@gmail.com/T/#u .../selftests/tmpfs/bug-link-o-tmpfile.c | 69 +++++++++++++++---- 1 file changed, 57 insertions(+), 12 deletions(-) diff --git a/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c b/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c index b5c3ddb90942..9ca1245784d9 100644 --- a/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c +++ b/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c @@ -23,45 +23,90 @@ #include <sys/mount.h> #include <unistd.h> +#include "../kselftest.h" + + int main(void) { int fd; + /* Setting up kselftest framework */ + ksft_print_header(); + ksft_set_plan(1); + + /* Check if test is run as root */ + if (geteuid()) { + ksft_test_result_skip("This test needs root to run!\n"); + return 1; + } + + if (unshare(CLONE_NEWNS) == -1) { if (errno == ENOSYS || errno == EPERM) { - fprintf(stderr, "error: unshare, errno %d\n", errno); - return 4; + ksft_test_result_fail("unshare() error: unshare, errno %d\n", errno); + return 1; } - fprintf(stderr, "error: unshare, errno %d\n", errno); - return 1; + else{ + fprintf(stderr, "unshare() error: unshare, errno %d\n", errno); + ksft_test_result_fail("unshare() error: unshare, errno %d\n", errno); + return 1; + + } + } + + else { + ksft_print_msg("unshare(): Creat new mount namespace: Success.\n"); + } - if (mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) == -1) { - fprintf(stderr, "error: mount '/', errno %d\n", errno); + + + + if (mount(NULL, "/", NULL, MS_PRIVATE | MS_REC, NULL) == -1) { + ksft_test_result_fail("mount() error: Root filesystem private mount: Fail %d\n", errno); return 1; + } else { + ksft_print_msg("mount(): Root filesystem private mount: Success\n"); } + /* Our heroes: 1 root inode, 1 O_TMPFILE inode, 1 permanent inode. */ if (mount(NULL, "/tmp", "tmpfs", 0, "nr_inodes=3") == -1) { - fprintf(stderr, "error: mount tmpfs, errno %d\n", errno); + ksft_test_result_fail("mount() error: Mounting tmpfs on /tmp: Fail %d\n", errno); return 1; + } else { + ksft_print_msg("mount(): Mounting tmpfs on /tmp: Success\n"); } - fd = openat(AT_FDCWD, "/tmp", O_WRONLY|O_TMPFILE, 0600); + + fd = openat(AT_FDCWD, "/tmp", O_WRONLY | O_TMPFILE, 0600); if (fd == -1) { - fprintf(stderr, "error: open 1, errno %d\n", errno); + ksft_test_result_fail("openat() error: Open first temporary file: Fail %d\n", errno); return 1; + } else { + ksft_print_msg("openat(): Open first temporary file: Success\n"); } + + if (linkat(fd, "", AT_FDCWD, "/tmp/1", AT_EMPTY_PATH) == -1) { - fprintf(stderr, "error: linkat, errno %d\n", errno); + ksft_test_result_fail("linkat() error: Linking the temporary file: Fail %d\n", errno); + /* Ensure fd is closed on failure */ + close(fd); return 1; + } else { + ksft_print_msg("linkat(): Linking the temporary file: Success\n"); } close(fd); - fd = openat(AT_FDCWD, "/tmp", O_WRONLY|O_TMPFILE, 0600); + + fd = openat(AT_FDCWD, "/tmp", O_WRONLY | O_TMPFILE, 0600); if (fd == -1) { - fprintf(stderr, "error: open 2, errno %d\n", errno); + ksft_test_result_fail("openat() error: Opening the second temporary file: Fail %d\n", errno); return 1; + } else { + ksft_print_msg("openat(): Opening the second temporary file: Success\n"); } + ksft_test_result_pass("Test : Success\n"); + ksft_exit_pass(); return 0; } -- 2.45.2

8 months

2
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[PATCH v2] selftests/mount_setattr: fix idmap_mount_tree_invalid failed to run

by zhouyuhang

From: zhouyuhang <zhouyuhang(a)kylinos.cn> Test case idmap_mount_tree_invalid failed to run on the newer kernel with the following output: # RUN mount_setattr_idmapped.idmap_mount_tree_invalid ... # mount_setattr_test.c:1428:idmap_mount_tree_invalid:Expected sys_mount_setattr(open_tree_fd, "", AT_EMPTY_PATH, &attr, sizeof(attr)) (0) ! = 0 (0) # idmap_mount_tree_invalid: Test terminated by assertion This is because tmpfs is mounted at "/mnt/A", and tmpfs already contains the flag FS_ALLOW_IDMAP after the commit 7a80e5b8c6fa ("shmem: support idmapped mounts for tmpfs"). So calling sys_mount_setattr here returns 0 instead of -EINVAL as expected. Ramfs does not support idmap mounts, so we can use it here to test invalid mounts, which allows the test case to pass with the following output: # Starting 1 tests from 1 test cases. # RUN mount_setattr_idmapped.idmap_mount_tree_invalid ... # OK mount_setattr_idmapped.idmap_mount_tree_invalid ok 1 mount_setattr_idmapped.idmap_mount_tree_invalid # PASSED: 1 / 1 tests passed. Signed-off-by: zhouyuhang <zhouyuhang(a)kylinos.cn> --- .../testing/selftests/mount_setattr/mount_setattr_test.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c index c6a8c732b802..68801e1a9ec2 100644 --- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c +++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c @@ -1414,6 +1414,13 @@ TEST_F(mount_setattr_idmapped, idmap_mount_tree_invalid) ASSERT_EQ(expected_uid_gid(-EBADF, "/tmp/B/b", 0, 0, 0), 0); ASSERT_EQ(expected_uid_gid(-EBADF, "/tmp/B/BB/b", 0, 0, 0), 0); + ASSERT_EQ(mount("testing", "/mnt/A", "ramfs", MS_NOATIME | MS_NODEV, + "size=100000,mode=700"), 0); + + ASSERT_EQ(mkdir("/mnt/A/AA", 0777), 0); + + ASSERT_EQ(mount("/tmp", "/mnt/A/AA", NULL, MS_BIND | MS_REC, NULL), 0); + open_tree_fd = sys_open_tree(-EBADF, "/mnt/A", AT_RECURSIVE | AT_EMPTY_PATH | @@ -1433,6 +1440,8 @@ TEST_F(mount_setattr_idmapped, idmap_mount_tree_invalid) ASSERT_EQ(expected_uid_gid(-EBADF, "/tmp/B/BB/b", 0, 0, 0), 0); ASSERT_EQ(expected_uid_gid(open_tree_fd, "B/b", 0, 0, 0), 0); ASSERT_EQ(expected_uid_gid(open_tree_fd, "B/BB/b", 0, 0, 0), 0); + + (void)umount2("/mnt/A", MNT_DETACH); } TEST_F(mount_setattr, mount_attr_nosymfollow) -- 2.27.0

8 months

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Re: Dear Respectable, I wait for your response to this my message

by Evan Bohdan

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8 months

1
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[PATCH bpf-next] bpf: handle implicit declaration of function gettid in bpf_iter.c

by Jason Xing

From: Jason Xing <kernelxing(a)tencent.com> As we can see from the title, when I compiled the selftests/bpf, I saw the error: implicit declaration of function ‘gettid’ ; did you mean ‘getgid’? [-Werror=implicit-function-declaration] skel->bss->tid = gettid(); ^~~~~~ getgid Adding a define to fix it (referring to tools/perf/tests/shell/coresight/thread_loop/thread_loop.c file. Signed-off-by: Jason Xing <kernelxing(a)tencent.com> --- tools/testing/selftests/bpf/prog_tests/bpf_iter.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c index f0a3a9c18e9e..a105759f3dcf 100644 --- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c +++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c @@ -34,6 +34,8 @@ #include "bpf_iter_ksym.skel.h" #include "bpf_iter_sockmap.skel.h" +#define gettid() syscall(SYS_gettid) + static void test_btf_id_or_null(void) { struct bpf_iter_test_kern3 *skel; -- 2.37.3

8 months

2
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[PATCH 0/6] damon/{self,kunit}tests: minor fixups for DAMON debugfs interface tests

by SeongJae Park

Fixup small broken window panes in DAMON selftests and kunit tests. First four patches clean up DAMON debugfs interface selftests output, by fixing segmentation fault of a test program (patch 1), removing unnecessary debugging messages (patch 2), and hiding error messages from expected failures (patches 3 and 4). Following two patches fix copy-paste mistakes in DAMON Kconfig help message that copied from debugfs kunit test (patch 5) and a comment on the debugfs kunit test code (patch 6). Signed-off-by: SeongJae Park <sj(a)kernel.org> Andrew Paniakin (1): selftests/damon/huge_count_read_write: provide sufficiently large buffer for DEPRECATED file read SeongJae Park (5): selftests/damon/huge_count_read_write: remove unnecessary debugging message selftests/damon/_debugfs_common: hide expected error message from test_write_result() selftests/damon/debugfs_duplicate_context_creation: hide errors from expected file write failures mm/damon/Kconfig: update DBGFS_KUNIT prompt copy for SYSFS_KUNIT mm/damon/tests/dbgfs-kunit: fix the header double inclusion guarding ifdef comment mm/damon/Kconfig | 2 +- mm/damon/tests/dbgfs-kunit.h | 2 +- tools/testing/selftests/damon/_debugfs_common.sh | 7 ++++++- .../selftests/damon/debugfs_duplicate_context_creation.sh | 2 +- tools/testing/selftests/damon/huge_count_read_write.c | 4 +--- 5 files changed, 10 insertions(+), 7 deletions(-) base-commit: 13583c750117b4e10cdaf5578dcc7723b305ce4e -- 2.39.5

8 months

1
5
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[PATCH net-next v3] selftest/tcp-ao: Add filter tests

by Leo Stone

Add tests that check if getsockopt(TCP_AO_GET_KEYS) returns the right keys when using different filters. Sample output: > # ok 114 filter keys: by sndid, rcvid, address > # ok 115 filter keys: by is_current > # ok 116 filter keys: by is_rnext > # ok 117 filter keys: by sndid, rcvid > # ok 118 filter keys: correct nkeys when in.nkeys < matches Acked-by: Dmitry Safonov <0x7f454c46(a)gmail.com> Signed-off-by: Leo Stone <leocstone(a)gmail.com> --- v3: - Ordered locals in reverse xmas tree order - Separated socket fd declaration from assignment - Broke lines longer than 80 columns v2: https://lore.kernel.org/netdev/20241016055823.21299-1-leocstone@gmail.com/ - Changed 2 unnecessary test_error calls to test_fail - Added another test to make sure getsockopt returns the right nkeys value when the input nkeys is smaller than the number of matching keys - Removed the TODO that this patch addresses v1: https://lore.kernel.org/netdev/20241014213313.15100-1-leocstone@gmail.com/ Thanks to the reviewers for their time and feedback! --- .../selftests/net/tcp_ao/setsockopt-closed.c | 186 +++++++++++++++++- 1 file changed, 181 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c b/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c index 084db4ecdff6..0abb9807d742 100644 --- a/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c +++ b/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c @@ -6,6 +6,8 @@ static union tcp_addr tcp_md5_client; +#define FILTER_TEST_NKEYS 16 + static int test_port = 7788; static void make_listen(int sk) { @@ -813,23 +815,197 @@ static void duplicate_tests(void) setsockopt_checked(sk, TCP_AO_ADD_KEY, &ao, EEXIST, "duplicate: SendID differs"); } +static void fetch_all_keys(int sk, struct tcp_ao_getsockopt *keys) +{ + socklen_t optlen = sizeof(struct tcp_ao_getsockopt); + + memset(keys, 0, sizeof(struct tcp_ao_getsockopt) * FILTER_TEST_NKEYS); + keys[0].get_all = 1; + keys[0].nkeys = FILTER_TEST_NKEYS; + if (getsockopt(sk, IPPROTO_TCP, TCP_AO_GET_KEYS, &keys[0], &optlen)) + test_error("getsockopt"); +} + +static int prepare_test_keys(struct tcp_ao_getsockopt *keys) +{ + const char *test_password = "Test password number "; + struct tcp_ao_add test_ao[FILTER_TEST_NKEYS]; + char test_password_scratch[64] = {}; + u8 rcvid = 100, sndid = 100; + int sk; + + sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP); + if (sk < 0) + test_error("socket()"); + + for (int i = 0; i < FILTER_TEST_NKEYS; i++) { + snprintf(test_password_scratch, 64, "%s %d", test_password, i); + test_prepare_key(&test_ao[i], DEFAULT_TEST_ALGO, this_ip_dest, + false, false, DEFAULT_TEST_PREFIX, 0, sndid++, + rcvid++, 0, 0, strlen(test_password_scratch), + test_password_scratch); + } + test_ao[0].set_current = 1; + test_ao[1].set_rnext = 1; + /* One key with a different addr and overlapping sndid, rcvid */ + tcp_addr_to_sockaddr_in(&test_ao[2].addr, &this_ip_addr, 0); + test_ao[2].sndid = 100; + test_ao[2].rcvid = 100; + + /* Add keys in a random order */ + for (int i = 0; i < FILTER_TEST_NKEYS; i++) { + int randidx = rand() % (FILTER_TEST_NKEYS - i); + + if (setsockopt(sk, IPPROTO_TCP, TCP_AO_ADD_KEY, + &test_ao[randidx], sizeof(struct tcp_ao_add))) + test_error("setsockopt()"); + memcpy(&test_ao[randidx], &test_ao[FILTER_TEST_NKEYS - 1 - i], + sizeof(struct tcp_ao_add)); + } + + fetch_all_keys(sk, keys); + + return sk; +} + +/* Assumes passwords are unique */ +static int compare_mkts(struct tcp_ao_getsockopt *expected, int nexpected, + struct tcp_ao_getsockopt *actual, int nactual) +{ + int matches = 0; + + for (int i = 0; i < nexpected; i++) { + for (int j = 0; j < nactual; j++) { + if (memcmp(expected[i].key, actual[j].key, + TCP_AO_MAXKEYLEN) == 0) + matches++; + } + } + return nexpected - matches; +} + +static void filter_keys_checked(int sk, struct tcp_ao_getsockopt *filter, + struct tcp_ao_getsockopt *expected, + unsigned int nexpected, const char *tst) +{ + struct tcp_ao_getsockopt filtered_keys[FILTER_TEST_NKEYS] = {}; + struct tcp_ao_getsockopt all_keys[FILTER_TEST_NKEYS] = {}; + socklen_t len = sizeof(struct tcp_ao_getsockopt); + + fetch_all_keys(sk, all_keys); + memcpy(&filtered_keys[0], filter, sizeof(struct tcp_ao_getsockopt)); + filtered_keys[0].nkeys = FILTER_TEST_NKEYS; + if (getsockopt(sk, IPPROTO_TCP, TCP_AO_GET_KEYS, filtered_keys, &len)) + test_error("getsockopt"); + if (filtered_keys[0].nkeys != nexpected) { + test_fail("wrong nr of keys, expected %u got %u", nexpected, + filtered_keys[0].nkeys); + goto out_close; + } + if (compare_mkts(expected, nexpected, filtered_keys, + filtered_keys[0].nkeys)) { + test_fail("got wrong keys back"); + goto out_close; + } + test_ok("filter keys: %s", tst); + +out_close: + close(sk); + memset(filter, 0, sizeof(struct tcp_ao_getsockopt)); +} + +static void filter_tests(void) +{ + struct tcp_ao_getsockopt original_keys[FILTER_TEST_NKEYS]; + struct tcp_ao_getsockopt expected_keys[FILTER_TEST_NKEYS]; + struct tcp_ao_getsockopt filter = {}; + int sk, f, nmatches; + socklen_t len; + + f = 2; + sk = prepare_test_keys(original_keys); + filter.rcvid = original_keys[f].rcvid; + filter.sndid = original_keys[f].sndid; + memcpy(&filter.addr, &original_keys[f].addr, + sizeof(original_keys[f].addr)); + filter.prefix = original_keys[f].prefix; + filter_keys_checked(sk, &filter, &original_keys[f], 1, + "by sndid, rcvid, address"); + + f = -1; + sk = prepare_test_keys(original_keys); + for (int i = 0; i < original_keys[0].nkeys; i++) { + if (original_keys[i].is_current) { + f = i; + break; + } + } + if (f < 0) + test_error("No current key after adding one"); + filter.is_current = 1; + filter_keys_checked(sk, &filter, &original_keys[f], 1, "by is_current"); + + f = -1; + sk = prepare_test_keys(original_keys); + for (int i = 0; i < original_keys[0].nkeys; i++) { + if (original_keys[i].is_rnext) { + f = i; + break; + } + } + if (f < 0) + test_error("No rnext key after adding one"); + filter.is_rnext = 1; + filter_keys_checked(sk, &filter, &original_keys[f], 1, "by is_rnext"); + + f = -1; + nmatches = 0; + sk = prepare_test_keys(original_keys); + for (int i = 0; i < original_keys[0].nkeys; i++) { + if (original_keys[i].sndid == 100) { + f = i; + memcpy(&expected_keys[nmatches], &original_keys[i], + sizeof(struct tcp_ao_getsockopt)); + nmatches++; + } + } + if (f < 0) + test_error("No key for sndid 100"); + if (nmatches != 2) + test_error("Should have 2 keys with sndid 100"); + filter.rcvid = original_keys[f].rcvid; + filter.sndid = original_keys[f].sndid; + filter.addr.ss_family = test_family; + filter_keys_checked(sk, &filter, expected_keys, nmatches, + "by sndid, rcvid"); + + sk = prepare_test_keys(original_keys); + filter.get_all = 1; + filter.nkeys = FILTER_TEST_NKEYS / 2; + len = sizeof(struct tcp_ao_getsockopt); + if (getsockopt(sk, IPPROTO_TCP, TCP_AO_GET_KEYS, &filter, &len)) + test_error("getsockopt"); + if (filter.nkeys == FILTER_TEST_NKEYS) + test_ok("filter keys: correct nkeys when in.nkeys < matches"); + else + test_fail("filter keys: wrong nkeys, expected %u got %u", + FILTER_TEST_NKEYS, filter.nkeys); +} + static void *client_fn(void *arg) { if (inet_pton(TEST_FAMILY, __TEST_CLIENT_IP(2), &tcp_md5_client) != 1) test_error("Can't convert ip address"); extend_tests(); einval_tests(); + filter_tests(); duplicate_tests(); - /* - * TODO: check getsockopt(TCP_AO_GET_KEYS) with different filters - * returning proper nr & keys; - */ return NULL; } int main(int argc, char *argv[]) { - test_init(121, client_fn, NULL); + test_init(126, client_fn, NULL); return 0; } -- 2.43.0

8 months

3
2
0 0

[PATCH net 0/3] mptcp: sched: fix some lock issues

by Matthieu Baerts (NGI0)

Two small fixes related to the MPTCP packets scheduler: - Patch 1: add missing rcu_read_(un)lock(). A fix for >= 6.6. - Patch 2: remove unneeded lock when listing packets schedulers. A fix for >= 6.10. And some modifications in the MPTCP selftests: - Patch 3: a small addition to the MPTCP selftests to cover more code. Signed-off-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- Matthieu Baerts (NGI0) (3): mptcp: init: protect sched with rcu_read_lock mptcp: remove unneeded lock when listing scheds selftests: mptcp: list sysctl data net/mptcp/protocol.c | 2 ++ net/mptcp/sched.c | 2 -- tools/testing/selftests/net/mptcp/mptcp_connect.sh | 9 +++++++++ 3 files changed, 11 insertions(+), 2 deletions(-) --- base-commit: 3b05b9c36ddd01338e1352588f2ec1ea23f97d43 change-id: 20241021-net-mptcp-sched-lock-10dfc75d1e00 Best regards, -- Matthieu Baerts (NGI0) <matttbe(a)kernel.org>

8 months

5
10
0 0

[PATCH v3 0/5] implement lightweight guard pages

by Lorenzo Stoakes

Userland library functions such as allocators and threading implementations often require regions of memory to act as 'guard pages' - mappings which, when accessed, result in a fatal signal being sent to the accessing process. The current means by which these are implemented is via a PROT_NONE mmap() mapping, which provides the required semantics however incur an overhead of a VMA for each such region. With a great many processes and threads, this can rapidly add up and incur a significant memory penalty. It also has the added problem of preventing merges that might otherwise be permitted. This series takes a different approach - an idea suggested by Vlasimil Babka (and before him David Hildenbrand and Jann Horn - perhaps more - the provenance becomes a little tricky to ascertain after this - please forgive any omissions!) - rather than locating the guard pages at the VMA layer, instead placing them in page tables mapping the required ranges. Early testing of the prototype version of this code suggests a 5 times speed up in memory mapping invocations (in conjunction with use of process_madvise()) and a 13% reduction in VMAs on an entirely idle android system and unoptimised code. We expect with optimisation and a loaded system with a larger number of guard pages this could significantly increase, but in any case these numbers are encouraging. This way, rather than having separate VMAs specifying which parts of a range are guard pages, instead we have a VMA spanning the entire range of memory a user is permitted to access and including ranges which are to be 'guarded'. After mapping this, a user can specify which parts of the range should result in a fatal signal when accessed. By restricting the ability to specify guard pages to memory mapped by existing VMAs, we can rely on the mappings being torn down when the mappings are ultimately unmapped and everything works simply as if the memory were not faulted in, from the point of view of the containing VMAs. This mechanism in effect poisons memory ranges similar to hardware memory poisoning, only it is an entirely software-controlled form of poisoning. The mechanism is implemented via madvise() behaviour - MADV_GUARD_INSTALL which installs page table-level guard page markers - and MADV_GUARD_REMOVE - which clears them. Guard markers can be installed across multiple VMAs and any existing mappings will be cleared, that is zapped, before installing the guard page markers in the page tables. There is no concept of 'nested' guard markers, multiple attempts to install guard markers in a range will, after the first attempt, have no effect. Importantly, removing guard markers over a range that contains both guard markers and ordinary backed memory has no effect on anything but the guard markers (including leaving huge pages un-split), so a user can safely remove guard markers over a range of memory leaving the rest intact. The actual mechanism by which the page table entries are specified makes use of existing logic - PTE markers, which are used for the userfaultfd UFFDIO_POISON mechanism. Unfortunately PTE_MARKER_POISONED is not suited for the guard page mechanism as it results in VM_FAULT_HWPOISON semantics in the fault handler, so we add our own specific PTE_MARKER_GUARD and adapt existing logic to handle it. We also extend the generic page walk mechanism to allow for installation of PTEs (carefully restricted to memory management logic only to prevent unwanted abuse). We ensure that zapping performed by MADV_DONTNEED and MADV_FREE do not remove guard markers, nor does forking (except when VM_WIPEONFORK is specified for a VMA which implies a total removal of memory characteristics). It's important to note that the guard page implementation is emphatically NOT a security feature, so a user can remove the markers if they wish. We simply implement it in such a way as to provide the least surprising behaviour. An extensive set of self-tests are provided which ensure behaviour is as expected and additionally self-documents expected behaviour of guard ranges. Suggested-by: Vlastimil Babka <vbabka(a)suse.cz> Suggested-by: Jann Horn <jannh(a)google.com> Suggested-by: David Hildenbrand <david(a)redhat.com> v3 * Cleaned up mm/pagewalk.c logic a bit to make things clearer, as suggested by Vlastiml. * Explicitly avoid splitting THP on PTE installation, as suggested by Vlastimil. Note this has no impact on the guard pages logic, which has page table entry handlers at PUD, PMD and PTE level. * Added WARN_ON_ONCE() to mm/hugetlb.c path where we don't expect a guard marker, as suggested by Vlastimil. * Reverted change to is_poisoned_swp_entry() to exclude guard pages which has the effect of MADV_FREE _not_ clearing guard pages. After discussion with Vlastimil, it became apparent that the ability to 'cancel' the freeing operation by writing to the mapping after having issued an MADV_FREE would mean that we would risk unexpected behaviour should the guard pages be removed, so we now do not remove markers here at all. * Added comment to PTE_MARKER_GUARD to highlight that memory tagged with the marker behaves as if it were a region mapped PROT_NONE, as highlighted by David. * Rename poison -> install, unpoison -> remove (i.e. MADV_GUARD_INSTALL / MADV_GUARD_REMOVE over MADV_GUARD_POISON / MADV_GUARD_REMOVE) at the request of David and John who both find the poison analogy confusing/overloaded. * After a lot of discussion, replace the looping behaviour should page faults race with guard page installation with a modest reattempt followed by returning -ERESTARTNOINTR to have the operation abort and re-enter, relieving lock contention and avoiding the possibility of allowing a malicious sandboxed process to impact the mmap lock or stall the overall process more than necessary, as suggested by Jann and Vlastimil having raised the issue. * Adjusted the page table walker so a populated huge PUD or PMD is correctly treated as being populated, necessitating a zap. In v2 we incorrectly skipped over these, which would cause the logic to wrongly proceed as if nothing were populated and the install succeeded. Instead, explicitly check to see if a huge page - if so, do not split but rather abort the operation and let zap take care of things. * Updated the guard remove logic to not unnecessarily split huge pages either. * Added a debug check to assert that the number of installed PTEs matches expectation, accounting for any existing guard pages. * Adapted vector_madvise() used by the process_madvise() system call to handle -ERESTARTNOINTR correctly. v2 * The macros in kselftest_harness.h seem to be broken - __EXPECT() is terminated by '} while (0); OPTIONAL_HANDLER(_assert)' meaning it is not safe in single line if / else or for /which blocks, however working around this results in checkpatch producing invalid warnings, as reported by Shuah. * Fixing these macros is out of scope for this series, so compromise and instead rewrite test blocks so as to use multiple lines by separating out a decl in most cases. This has the side effect of, for the most part, making things more readable. * Heavily document the use of the volatile keyword - we can't avoid checkpatch complaining about this, so we explain it, as reported by Shuah. * Updated commit message to highlight that we skip tests we lack permissions for, as reported by Shuah. * Replaced a perror() with ksft_exit_fail_perror(), as reported by Shuah. * Added user friendly messages to cases where tests are skipped due to lack of permissions, as reported by Shuah. * Update the tool header to include the new MADV_GUARD_POISON/UNPOISON defines and directly include asm-generic/mman.h to get the platform-neutral versions to ensure we import them. * Finally fixed Vlastimil's email address in Suggested-by tags from suze to suse, as reported by Vlastimil. * Added linux-api to cc list, as reported by Vlastimil. https://lore.kernel.org/all/cover.1729440856.git.lorenzo.stoakes@oracle.com/ v1 * Un-RFC'd as appears no major objections to approach but rather debate on implementation. * Fixed issue with arches which need mmu_context.h and tlbfush.h. header imports in pagewalker logic to be able to use update_mmu_cache() as reported by the kernel test bot. * Added comments in page walker logic to clarify who can use ops->install_pte and why as well as adding a check_ops_valid() helper function, as suggested by Christoph. * Pass false in full parameter in pte_clear_not_present_full() as suggested by Jann. * Stopped erroneously requiring a write lock for the poison operation as suggested by Jann and Suren. * Moved anon_vma_prepare() to the start of madvise_guard_poison() to be consistent with how this is used elsewhere in the kernel as suggested by Jann. * Avoid returning -EAGAIN if we are raced on page faults, just keep looping and duck out if a fatal signal is pending or a conditional reschedule is needed, as suggested by Jann. * Avoid needlessly splitting huge PUDs and PMDs by specifying ACTION_CONTINUE, as suggested by Jann. https://lore.kernel.org/all/cover.1729196871.git.lorenzo.stoakes@oracle.com/ RFC https://lore.kernel.org/all/cover.1727440966.git.lorenzo.stoakes@oracle.com/ Lorenzo Stoakes (5): mm: pagewalk: add the ability to install PTEs mm: add PTE_MARKER_GUARD PTE marker mm: madvise: implement lightweight guard page mechanism tools: testing: update tools UAPI header for mman-common.h selftests/mm: add self tests for guard page feature arch/alpha/include/uapi/asm/mman.h | 3 + arch/mips/include/uapi/asm/mman.h | 3 + arch/parisc/include/uapi/asm/mman.h | 3 + arch/xtensa/include/uapi/asm/mman.h | 3 + include/linux/mm_inline.h | 2 +- include/linux/pagewalk.h | 18 +- include/linux/swapops.h | 24 +- include/uapi/asm-generic/mman-common.h | 3 + mm/hugetlb.c | 4 + mm/internal.h | 12 + mm/madvise.c | 225 ++++ mm/memory.c | 18 +- mm/mprotect.c | 6 +- mm/mseal.c | 1 + mm/pagewalk.c | 227 +++- tools/include/uapi/asm-generic/mman-common.h | 3 + tools/testing/selftests/mm/.gitignore | 1 + tools/testing/selftests/mm/Makefile | 1 + tools/testing/selftests/mm/guard-pages.c | 1239 ++++++++++++++++++ 19 files changed, 1720 insertions(+), 76 deletions(-) create mode 100644 tools/testing/selftests/mm/guard-pages.c -- 2.47.0

8 months

5
28
0 0

kselftest:arm64/FVP: arm64_check_buffer_fill - failed on Linux next-20241025

by Naresh Kamboju

The following kselftest arm64 and FVP failed with Linux next-20241025 on - Qemu-arm64 - FVP running Linux next-20241025 kernel. First seen on next-20241025 Good: next-20241024 BAD: next-20241025 kselftest-arm64, FVP * arm64_check_buffer_fill * arm64_check_mmap_options * arm64_check_child_memory Anyone have seen these failures ? Reported-by: Linux Kernel Functional Testing <lkft(a)linaro.org> Test log: ---------- # selftests: arm64: check_buffer_fill # 1..20 # ok 1 Check buffer correctness by byte with sync err mode and mmap memory # ok 2 Check buffer correctness by byte with async err mode and mmap memory # ok 3 Check buffer correctness by byte with sync err mode and mmap/mprotect memory # ok 4 Check buffer correctness by byte with async err mode and mmap/mprotect memory # ok 5 Check buffer write underflow by byte with sync mode and mmap memory # ok 6 Check buffer write underflow by byte with async mode and mmap memory # ok 7 Check buffer write underflow by byte with tag check fault ignore and mmap memory # ok 8 Check buffer write underflow by byte with sync mode and mmap memory # ok 9 Check buffer write underflow by byte with async mode and mmap memory # ok 10 Check buffer write underflow by byte with tag check fault ignore and mmap memory # ok 11 Check buffer write overflow by byte with sync mode and mmap memory # ok 12 Check buffer write overflow by byte with async mode and mmap memory # ok 13 Check buffer write overflow by byte with tag fault ignore mode and mmap memory # ok 14 Check buffer write correctness by block with sync mode and mmap memory # ok 15 Check buffer write correctness by block with async mode and mmap memory # ok 16 Check buffer write correctness by block with tag fault ignore and mmap memory # # FAIL: mmap allocation # # FAIL: memory allocation # not ok 17 Check initial tags with private mapping, sync error mode and mmap memory # ok 18 Check initial tags with private mapping, sync error mode and mmap/mprotect memory # # FAIL: mmap allocation # # FAIL: memory allocation # not ok 19 Check initial tags with shared mapping, sync error mode and mmap memory # ok 20 Check initial tags with shared mapping, sync error mode and mmap/mprotect memory # # Totals: pass:18 fail:2 xfail:0 xpass:0 skip:0 error:0 not ok 21 selftests: arm64: check_buffer_fill # exit=1 # timeout set to 45 # selftests: arm64: check_child_memory # 1..12 # ok 1 Check child anonymous memory with private mapping, precise mode and mmap memory # ok 2 Check child anonymous memory with shared mapping, precise mode and mmap memory # ok 3 Check child anonymous memory with private mapping, imprecise mode and mmap memory # ok 4 Check child anonymous memory with shared mapping, imprecise mode and mmap memory # ok 5 Check child anonymous memory with private mapping, precise mode and mmap/mprotect memory # ok 6 Check child anonymous memory with shared mapping, precise mode and mmap/mprotect memory # # FAIL: mmap allocation # # FAIL: memory allocation # not ok 7 Check child file memory with private mapping, precise mode and mmap memory # # FAIL: mmap allocation # # FAIL: memory allocation # not ok 8 Check child file memory with shared mapping, precise mode and mmap memory # ok 9 Check child file memory with private mapping, imprecise mode and mmap memory # ok 10 Check child file memory with shared mapping, imprecise mode and mmap memory # ok 11 Check child file memory with private mapping, precise mode and mmap/mprotect memory # ok 12 Check child file memory with shared mapping, precise mode and mmap/mprotect memory # # Totals: pass:10 fail:2 xfail:0 xpass:0 skip:0 error:0 not ok 22 selftests: arm64: check_child_memory # exit=1 boot Log links, -------- - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241028/te… - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241028/te… Test results history: ---------- - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241028/te… - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241028/te… metadata: ---- git describe: next-20241028 git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next git sha: dec9255a128e19c5fcc3bdb18175d78094cc624d kernel config: https://storage.tuxsuite.com/public/linaro/lkft/builds/2o3tMqzOtHXYQjlvfR5t… build url: https://storage.tuxsuite.com/public/linaro/lkft/builds/2o3tMqzOtHXYQjlvfR5t… toolchain: gcc-13 Steps to reproduce: --------- - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2o3tON5kNi… - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2o3tON5kNi… -- Linaro LKFT https://lkft.linaro.org

8 months

2
1
0 0

[PATCH v1 00/10] iommufd: Add VIOMMU infrastructure (Part-2 VIRQ)

by Nicolin Chen

As the part-2 of the VIOMMU infrastructure, this series introduces a VIRQ object after repurposing the existing FAULT object, which provides a nice notification pathway to the user space already. So, the first thing to do is reworking the FAULT object. Mimicing the HWPT structures, add a common EVENT structure to support its derivatives: EVENT_IOPF (the prior FAULT object) and EVENT_VIRQ (new one). IOMMUFD_CMD_VIRQ_ALLOC is introduced to allocate EVENT_VIRQ for a VIOMMU. One VIOMMU can have multiple VIRQs in different types but can not support multiple VIRQs with the same types. Drivers might need the VIOMMU's vdev_id list or the exact vdev_id link of the passthrough device's to forward IRQs/events via the VIOMMU framework. Thus, extend the set/unset_vdev_id ioctls down to the driver using VIOMMU ops. This allows drivers to take the control of a vdev_id's lifecycle. The forwarding part is fairly simple but might need to replace a physical device ID with a virtual device ID. So, there comes with some helpers for drivers to use. As usual, this series comes with the selftest coverage for this new VIRQ, and with a real world use case in the ARM SMMUv3 driver. This must be based on the VIOMMU Part-1 series. It's on Github: https://github.com/nicolinc/iommufd/commits/iommufd_virq-v1 Paring QEMU branch for testing: https://github.com/nicolinc/qemu/commits/wip/for_iommufd_virq-v1 Thanks! Nicolin Nicolin Chen (10): iommufd: Rename IOMMUFD_OBJ_FAULT to IOMMUFD_OBJ_EVENT_IOPF iommufd: Rename fault.c to event.c iommufd: Add IOMMUFD_OBJ_EVENT_VIRQ and IOMMUFD_CMD_VIRQ_ALLOC iommufd/viommu: Allow drivers to control vdev_id lifecycle iommufd/viommu: Add iommufd_vdev_id_to_dev helper iommufd/viommu: Add iommufd_viommu_report_irq helper iommufd/selftest: Implement mock_viommu_set/unset_vdev_id iommufd/selftest: Add IOMMU_TEST_OP_TRIGGER_VIRQ for VIRQ coverage iommufd/selftest: Add EVENT_VIRQ test coverage iommu/arm-smmu-v3: Report virtual IRQ for device in user space drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 109 +++- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 2 + drivers/iommu/iommufd/Makefile | 2 +- drivers/iommu/iommufd/device.c | 2 + drivers/iommu/iommufd/event.c | 613 ++++++++++++++++++ drivers/iommu/iommufd/fault.c | 443 ------------- drivers/iommu/iommufd/hw_pagetable.c | 12 +- drivers/iommu/iommufd/iommufd_private.h | 147 ++++- drivers/iommu/iommufd/iommufd_test.h | 10 + drivers/iommu/iommufd/main.c | 13 +- drivers/iommu/iommufd/selftest.c | 66 ++ drivers/iommu/iommufd/viommu.c | 25 +- drivers/iommu/iommufd/viommu_api.c | 54 ++ include/linux/iommufd.h | 28 + include/uapi/linux/iommufd.h | 46 ++ tools/testing/selftests/iommu/iommufd.c | 11 + tools/testing/selftests/iommu/iommufd_utils.h | 64 ++ 17 files changed, 1130 insertions(+), 517 deletions(-) create mode 100644 drivers/iommu/iommufd/event.c delete mode 100644 drivers/iommu/iommufd/fault.c -- 2.43.0

8 months

2
16
0 0

[PATCH RFC 08/10] mm: page_frag: add testing for the newly added API

by Yunsheng Lin

Add testing for the newly added prepare API, for both aligned and non-aligned API, also probe API is also tested along with prepare API. CC: Alexander Duyck <alexander.duyck(a)gmail.com> CC: Andrew Morton <akpm(a)linux-foundation.org> CC: Linux-MM <linux-mm(a)kvack.org> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> --- .../selftests/mm/page_frag/page_frag_test.c | 76 +++++++++++++++++-- tools/testing/selftests/mm/run_vmtests.sh | 4 + tools/testing/selftests/mm/test_page_frag.sh | 27 +++++++ 3 files changed, 102 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index e806c1866e36..3b3c32389def 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -32,6 +32,10 @@ static bool test_align; module_param(test_align, bool, 0); MODULE_PARM_DESC(test_align, "use align API for testing"); +static bool test_prepare; +module_param(test_prepare, bool, 0); +MODULE_PARM_DESC(test_prepare, "use prepare API for testing"); + static int test_alloc_len = 2048; module_param(test_alloc_len, int, 0); MODULE_PARM_DESC(test_alloc_len, "alloc len for testing"); @@ -74,6 +78,21 @@ static int page_frag_pop_thread(void *arg) return 0; } +static void frag_frag_test_commit(struct page_frag_cache *nc, + struct page_frag *prepare_pfrag, + struct page_frag *probe_pfrag, + unsigned int used_sz) +{ + if (prepare_pfrag->page != probe_pfrag->page || + prepare_pfrag->offset != probe_pfrag->offset || + prepare_pfrag->size != probe_pfrag->size) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "wrong probed info\n"); + } + + page_frag_refill_commit(nc, prepare_pfrag, used_sz); +} + static int page_frag_push_thread(void *arg) { struct ptr_ring *ring = arg; @@ -86,15 +105,61 @@ static int page_frag_push_thread(void *arg) int ret; if (test_align) { - va = page_frag_alloc_align(&test_nc, test_alloc_len, - GFP_KERNEL, SMP_CACHE_BYTES); + if (test_prepare) { + struct page_frag prepare_frag, probe_frag; + void *probe_va; + + va = page_frag_alloc_refill_prepare_align(&test_nc, + test_alloc_len, + &prepare_frag, + GFP_KERNEL, + SMP_CACHE_BYTES); + + probe_va = __page_frag_alloc_refill_probe_align(&test_nc, + test_alloc_len, + &probe_frag, + -SMP_CACHE_BYTES); + if (va != probe_va) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "wrong va\n"); + } + + if (likely(va)) + frag_frag_test_commit(&test_nc, &prepare_frag, + &probe_frag, test_alloc_len); + } else { + va = page_frag_alloc_align(&test_nc, + test_alloc_len, + GFP_KERNEL, + SMP_CACHE_BYTES); + } if ((unsigned long)va & (SMP_CACHE_BYTES - 1)) { force_exit = true; WARN_ONCE(true, TEST_FAILED_PREFIX "unaligned va returned\n"); } } else { - va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + if (test_prepare) { + struct page_frag prepare_frag, probe_frag; + void *probe_va; + + va = page_frag_alloc_refill_prepare(&test_nc, test_alloc_len, + &prepare_frag, GFP_KERNEL); + + probe_va = page_frag_alloc_refill_probe(&test_nc, test_alloc_len, + &probe_frag); + + if (va != probe_va) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "wrong va\n"); + } + + if (likely(va)) + frag_frag_test_commit(&test_nc, &prepare_frag, + &probe_frag, test_alloc_len); + } else { + va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + } } if (!va) @@ -176,8 +241,9 @@ static int __init page_frag_test_init(void) } duration = (u64)ktime_us_delta(ktime_get(), start); - pr_info("%d of iterations for %s testing took: %lluus\n", nr_test, - test_align ? "aligned" : "non-aligned", duration); + pr_info("%d of iterations for %s %s API testing took: %lluus\n", nr_test, + test_align ? "aligned" : "non-aligned", + test_prepare ? "prepare" : "alloc", duration); out: ptr_ring_cleanup(&ptr_ring, NULL); diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index 2c5394584af4..f6ff9080a6f2 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -464,6 +464,10 @@ CATEGORY="page_frag" run_test ./test_page_frag.sh aligned CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned +CATEGORY="page_frag" run_test ./test_page_frag.sh aligned_prepare + +CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned_prepare + echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix echo "1..${count_total}" | tap_output diff --git a/tools/testing/selftests/mm/test_page_frag.sh b/tools/testing/selftests/mm/test_page_frag.sh index f55b105084cf..1c757fd11844 100755 --- a/tools/testing/selftests/mm/test_page_frag.sh +++ b/tools/testing/selftests/mm/test_page_frag.sh @@ -43,6 +43,8 @@ check_test_failed_prefix() { SMOKE_PARAM="test_push_cpu=$TEST_CPU_0 test_pop_cpu=$TEST_CPU_1" NONALIGNED_PARAM="$SMOKE_PARAM test_alloc_len=75 nr_test=$NR_TEST" ALIGNED_PARAM="$NONALIGNED_PARAM test_align=1" +NONALIGNED_PREPARE_PARAM="$NONALIGNED_PARAM test_prepare=1" +ALIGNED_PREPARE_PARAM="$ALIGNED_PARAM test_prepare=1" check_test_requirements() { @@ -77,6 +79,20 @@ run_aligned_check() insmod $DRIVER $ALIGNED_PARAM > /dev/null 2>&1 } +run_nonaligned_prepare_check() +{ + echo "Run performance tests to evaluate how fast nonaligned prepare API is." + + insmod $DRIVER $NONALIGNED_PREPARE_PARAM > /dev/null 2>&1 +} + +run_aligned_prepare_check() +{ + echo "Run performance tests to evaluate how fast aligned prepare API is." + + insmod $DRIVER $ALIGNED_PREPARE_PARAM > /dev/null 2>&1 +} + run_smoke_check() { echo "Run smoke test." @@ -87,6 +103,7 @@ run_smoke_check() usage() { echo -n "Usage: $0 [ aligned ] | [ nonaligned ] | | [ smoke ] | " + echo "[ aligned_prepare ] | [ nonaligned_prepare ] | " echo "manual parameters" echo echo "Valid tests and parameters:" @@ -107,6 +124,12 @@ usage() echo "# Performance testing for aligned alloc API" echo "$0 aligned" echo + echo "# Performance testing for nonaligned prepare API" + echo "$0 nonaligned_prepare" + echo + echo "# Performance testing for aligned prepare API" + echo "$0 aligned_prepare" + echo exit 0 } @@ -158,6 +181,10 @@ function run_test() run_nonaligned_check elif [[ "$1" = "aligned" ]]; then run_aligned_check + elif [[ "$1" = "nonaligned_prepare" ]]; then + run_nonaligned_prepare_check + elif [[ "$1" = "aligned_prepare" ]]; then + run_aligned_prepare_check else run_manual_check $@ fi -- 2.33.0

8 months

1
0
0 0

[PATCH net-next v23 4/7] mm: page_frag: avoid caller accessing 'page_frag_cache' directly

by Yunsheng Lin

Use appropriate frag_page API instead of caller accessing 'page_frag_cache' directly. CC: Alexander Duyck <alexander.duyck(a)gmail.com> CC: Andrew Morton <akpm(a)linux-foundation.org> CC: Linux-MM <linux-mm(a)kvack.org> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> Acked-by: Chuck Lever <chuck.lever(a)oracle.com> --- drivers/vhost/net.c | 2 +- include/linux/page_frag_cache.h | 10 ++++++++++ net/core/skbuff.c | 6 +++--- net/rxrpc/conn_object.c | 4 +--- net/rxrpc/local_object.c | 4 +--- net/sunrpc/svcsock.c | 6 ++---- tools/testing/selftests/mm/page_frag/page_frag_test.c | 2 +- 7 files changed, 19 insertions(+), 15 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index f16279351db5..9ad37c012189 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -1325,7 +1325,7 @@ static int vhost_net_open(struct inode *inode, struct file *f) vqs[VHOST_NET_VQ_RX]); f->private_data = n; - n->pf_cache.va = NULL; + page_frag_cache_init(&n->pf_cache); return 0; } diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h index 67ac8626ed9b..0a52f7a179c8 100644 --- a/include/linux/page_frag_cache.h +++ b/include/linux/page_frag_cache.h @@ -7,6 +7,16 @@ #include <linux/mm_types_task.h> #include <linux/types.h> +static inline void page_frag_cache_init(struct page_frag_cache *nc) +{ + nc->va = NULL; +} + +static inline bool page_frag_cache_is_pfmemalloc(struct page_frag_cache *nc) +{ + return !!nc->pfmemalloc; +} + void page_frag_cache_drain(struct page_frag_cache *nc); void __page_frag_cache_drain(struct page *page, unsigned int count); void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 00afeb90c23a..6841e61a6bd0 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -753,14 +753,14 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len, if (in_hardirq() || irqs_disabled()) { nc = this_cpu_ptr(&netdev_alloc_cache); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); } else { local_bh_disable(); local_lock_nested_bh(&napi_alloc_cache.bh_lock); nc = this_cpu_ptr(&napi_alloc_cache.page); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); local_unlock_nested_bh(&napi_alloc_cache.bh_lock); local_bh_enable(); @@ -850,7 +850,7 @@ struct sk_buff *napi_alloc_skb(struct napi_struct *napi, unsigned int len) len = SKB_HEAD_ALIGN(len); data = page_frag_alloc(&nc->page, len, gfp_mask); - pfmemalloc = nc->page.pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(&nc->page); } local_unlock_nested_bh(&napi_alloc_cache.bh_lock); diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c index 1539d315afe7..694c4df7a1a3 100644 --- a/net/rxrpc/conn_object.c +++ b/net/rxrpc/conn_object.c @@ -337,9 +337,7 @@ static void rxrpc_clean_up_connection(struct work_struct *work) */ rxrpc_purge_queue(&conn->rx_queue); - if (conn->tx_data_alloc.va) - __page_frag_cache_drain(virt_to_page(conn->tx_data_alloc.va), - conn->tx_data_alloc.pagecnt_bias); + page_frag_cache_drain(&conn->tx_data_alloc); call_rcu(&conn->rcu, rxrpc_rcu_free_connection); } diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c index f9623ace2201..2792d2304605 100644 --- a/net/rxrpc/local_object.c +++ b/net/rxrpc/local_object.c @@ -452,9 +452,7 @@ void rxrpc_destroy_local(struct rxrpc_local *local) #endif rxrpc_purge_queue(&local->rx_queue); rxrpc_purge_client_connections(local); - if (local->tx_alloc.va) - __page_frag_cache_drain(virt_to_page(local->tx_alloc.va), - local->tx_alloc.pagecnt_bias); + page_frag_cache_drain(&local->tx_alloc); } /* diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 825ec5357691..b785425c3315 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1608,7 +1608,6 @@ static void svc_tcp_sock_detach(struct svc_xprt *xprt) static void svc_sock_free(struct svc_xprt *xprt) { struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); - struct page_frag_cache *pfc = &svsk->sk_frag_cache; struct socket *sock = svsk->sk_sock; trace_svcsock_free(svsk, sock); @@ -1618,8 +1617,7 @@ static void svc_sock_free(struct svc_xprt *xprt) sockfd_put(sock); else sock_release(sock); - if (pfc->va) - __page_frag_cache_drain(virt_to_head_page(pfc->va), - pfc->pagecnt_bias); + + page_frag_cache_drain(&svsk->sk_frag_cache); kfree(svsk); } diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index 13c44133e009..e806c1866e36 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -126,7 +126,7 @@ static int __init page_frag_test_init(void) u64 duration; int ret; - test_nc.va = NULL; + page_frag_cache_init(&test_nc); atomic_set(&nthreads, 2); init_completion(&wait); -- 2.33.0

8 months

1
0
0 0

[PATCH net-next v23 2/7] mm: move the page fragment allocator from page_alloc into its own file

by Yunsheng Lin

Inspired by [1], move the page fragment allocator from page_alloc into its own c file and header file, as we are about to make more change for it to replace another page_frag implementation in sock.c As this patchset is going to replace 'struct page_frag' with 'struct page_frag_cache' in sched.h, including page_frag_cache.h in sched.h has a compiler error caused by interdependence between mm_types.h and mm.h for asm-offsets.c, see [2]. So avoid the compiler error by moving 'struct page_frag_cache' to mm_types_task.h as suggested by Alexander, see [3]. 1. https://lore.kernel.org/all/20230411160902.4134381-3-dhowells@redhat.com/ 2. https://lore.kernel.org/all/15623dac-9358-4597-b3ee-3694a5956920@gmail.com/ 3. https://lore.kernel.org/all/CAKgT0UdH1yD=LSCXFJ=YM_aiA4OomD-2wXykO42bizaWMt… CC: David Howells <dhowells(a)redhat.com> CC: Alexander Duyck <alexander.duyck(a)gmail.com> CC: Andrew Morton <akpm(a)linux-foundation.org> CC: Linux-MM <linux-mm(a)kvack.org> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Acked-by: Andrew Morton <akpm(a)linux-foundation.org> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> --- include/linux/gfp.h | 22 --- include/linux/mm_types.h | 18 --- include/linux/mm_types_task.h | 18 +++ include/linux/page_frag_cache.h | 31 ++++ include/linux/skbuff.h | 1 + mm/Makefile | 1 + mm/page_alloc.c | 136 ---------------- mm/page_frag_cache.c | 145 ++++++++++++++++++ .../selftests/mm/page_frag/page_frag_test.c | 2 +- 9 files changed, 197 insertions(+), 177 deletions(-) create mode 100644 include/linux/page_frag_cache.h create mode 100644 mm/page_frag_cache.c diff --git a/include/linux/gfp.h b/include/linux/gfp.h index a951de920e20..a0a6d25f883f 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -371,28 +371,6 @@ __meminit void *alloc_pages_exact_nid_noprof(int nid, size_t size, gfp_t gfp_mas extern void __free_pages(struct page *page, unsigned int order); extern void free_pages(unsigned long addr, unsigned int order); -struct page_frag_cache; -void page_frag_cache_drain(struct page_frag_cache *nc); -extern void __page_frag_cache_drain(struct page *page, unsigned int count); -void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, - gfp_t gfp_mask, unsigned int align_mask); - -static inline void *page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align) -{ - WARN_ON_ONCE(!is_power_of_2(align)); - return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); -} - -static inline void *page_frag_alloc(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask) -{ - return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); -} - -extern void page_frag_free(void *addr); - #define __free_page(page) __free_pages((page), 0) #define free_page(addr) free_pages((addr), 0) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 6e3bdf8e38bc..92314ef2d978 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -521,9 +521,6 @@ static_assert(sizeof(struct ptdesc) <= sizeof(struct page)); */ #define STRUCT_PAGE_MAX_SHIFT (order_base_2(sizeof(struct page))) -#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) -#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) - /* * page_private can be used on tail pages. However, PagePrivate is only * checked by the VM on the head page. So page_private on the tail pages @@ -542,21 +539,6 @@ static inline void *folio_get_private(struct folio *folio) return folio->private; } -struct page_frag_cache { - void * va; -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - __u16 offset; - __u16 size; -#else - __u32 offset; -#endif - /* we maintain a pagecount bias, so that we dont dirty cache line - * containing page->_refcount every time we allocate a fragment. - */ - unsigned int pagecnt_bias; - bool pfmemalloc; -}; - typedef unsigned long vm_flags_t; /* diff --git a/include/linux/mm_types_task.h b/include/linux/mm_types_task.h index bff5706b76e1..0ac6daebdd5c 100644 --- a/include/linux/mm_types_task.h +++ b/include/linux/mm_types_task.h @@ -8,6 +8,7 @@ * (These are defined separately to decouple sched.h from mm_types.h as much as possible.) */ +#include <linux/align.h> #include <linux/types.h> #include <asm/page.h> @@ -43,6 +44,23 @@ struct page_frag { #endif }; +#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) +#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) +struct page_frag_cache { + void *va; +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + __u16 offset; + __u16 size; +#else + __u32 offset; +#endif + /* we maintain a pagecount bias, so that we dont dirty cache line + * containing page->_refcount every time we allocate a fragment. + */ + unsigned int pagecnt_bias; + bool pfmemalloc; +}; + /* Track pages that require TLB flushes */ struct tlbflush_unmap_batch { #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h new file mode 100644 index 000000000000..67ac8626ed9b --- /dev/null +++ b/include/linux/page_frag_cache.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _LINUX_PAGE_FRAG_CACHE_H +#define _LINUX_PAGE_FRAG_CACHE_H + +#include <linux/log2.h> +#include <linux/mm_types_task.h> +#include <linux/types.h> + +void page_frag_cache_drain(struct page_frag_cache *nc); +void __page_frag_cache_drain(struct page *page, unsigned int count); +void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, + gfp_t gfp_mask, unsigned int align_mask); + +static inline void *page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align) +{ + WARN_ON_ONCE(!is_power_of_2(align)); + return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); +} + +static inline void *page_frag_alloc(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask) +{ + return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); +} + +void page_frag_free(void *addr); + +#endif diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 48f1e0fa2a13..7adca0fa2602 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -31,6 +31,7 @@ #include <linux/in6.h> #include <linux/if_packet.h> #include <linux/llist.h> +#include <linux/page_frag_cache.h> #include <net/flow.h> #if IS_ENABLED(CONFIG_NF_CONNTRACK) #include <linux/netfilter/nf_conntrack_common.h> diff --git a/mm/Makefile b/mm/Makefile index d5639b036166..dba52bb0da8a 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -65,6 +65,7 @@ page-alloc-$(CONFIG_SHUFFLE_PAGE_ALLOCATOR) += shuffle.o memory-hotplug-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o obj-y += page-alloc.o +obj-y += page_frag_cache.o obj-y += init-mm.o obj-y += memblock.o obj-y += $(memory-hotplug-y) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8afab64814dc..6ca2abce857b 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4836,142 +4836,6 @@ void free_pages(unsigned long addr, unsigned int order) EXPORT_SYMBOL(free_pages); -/* - * Page Fragment: - * An arbitrary-length arbitrary-offset area of memory which resides - * within a 0 or higher order page. Multiple fragments within that page - * are individually refcounted, in the page's reference counter. - * - * The page_frag functions below provide a simple allocation framework for - * page fragments. This is used by the network stack and network device - * drivers to provide a backing region of memory for use as either an - * sk_buff->head, or to be used in the "frags" portion of skb_shared_info. - */ -static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, - gfp_t gfp_mask) -{ - struct page *page = NULL; - gfp_t gfp = gfp_mask; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | - __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; - page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, - PAGE_FRAG_CACHE_MAX_ORDER); - nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; -#endif - if (unlikely(!page)) - page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); - - nc->va = page ? page_address(page) : NULL; - - return page; -} - -void page_frag_cache_drain(struct page_frag_cache *nc) -{ - if (!nc->va) - return; - - __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); - nc->va = NULL; -} -EXPORT_SYMBOL(page_frag_cache_drain); - -void __page_frag_cache_drain(struct page *page, unsigned int count) -{ - VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); - - if (page_ref_sub_and_test(page, count)) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(__page_frag_cache_drain); - -void *__page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align_mask) -{ - unsigned int size = PAGE_SIZE; - struct page *page; - int offset; - - if (unlikely(!nc->va)) { -refill: - page = __page_frag_cache_refill(nc, gfp_mask); - if (!page) - return NULL; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* Even if we own the page, we do not use atomic_set(). - * This would break get_page_unless_zero() users. - */ - page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); - - /* reset page count bias and offset to start of new frag */ - nc->pfmemalloc = page_is_pfmemalloc(page); - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - nc->offset = size; - } - - offset = nc->offset - fragsz; - if (unlikely(offset < 0)) { - page = virt_to_page(nc->va); - - if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) - goto refill; - - if (unlikely(nc->pfmemalloc)) { - free_unref_page(page, compound_order(page)); - goto refill; - } - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* OK, page count is 0, we can safely set it */ - set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); - - /* reset page count bias and offset to start of new frag */ - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - offset = size - fragsz; - if (unlikely(offset < 0)) { - /* - * The caller is trying to allocate a fragment - * with fragsz > PAGE_SIZE but the cache isn't big - * enough to satisfy the request, this may - * happen in low memory conditions. - * We don't release the cache page because - * it could make memory pressure worse - * so we simply return NULL here. - */ - return NULL; - } - } - - nc->pagecnt_bias--; - offset &= align_mask; - nc->offset = offset; - - return nc->va + offset; -} -EXPORT_SYMBOL(__page_frag_alloc_align); - -/* - * Frees a page fragment allocated out of either a compound or order 0 page. - */ -void page_frag_free(void *addr) -{ - struct page *page = virt_to_head_page(addr); - - if (unlikely(put_page_testzero(page))) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(page_frag_free); - static void *make_alloc_exact(unsigned long addr, unsigned int order, size_t size) { diff --git a/mm/page_frag_cache.c b/mm/page_frag_cache.c new file mode 100644 index 000000000000..609a485cd02a --- /dev/null +++ b/mm/page_frag_cache.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Page fragment allocator + * + * Page Fragment: + * An arbitrary-length arbitrary-offset area of memory which resides within a + * 0 or higher order page. Multiple fragments within that page are + * individually refcounted, in the page's reference counter. + * + * The page_frag functions provide a simple allocation framework for page + * fragments. This is used by the network stack and network device drivers to + * provide a backing region of memory for use as either an sk_buff->head, or to + * be used in the "frags" portion of skb_shared_info. + */ + +#include <linux/export.h> +#include <linux/gfp_types.h> +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/page_frag_cache.h> +#include "internal.h" + +static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, + gfp_t gfp_mask) +{ + struct page *page = NULL; + gfp_t gfp = gfp_mask; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | + __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; + page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, + PAGE_FRAG_CACHE_MAX_ORDER); + nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; +#endif + if (unlikely(!page)) + page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); + + nc->va = page ? page_address(page) : NULL; + + return page; +} + +void page_frag_cache_drain(struct page_frag_cache *nc) +{ + if (!nc->va) + return; + + __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); + nc->va = NULL; +} +EXPORT_SYMBOL(page_frag_cache_drain); + +void __page_frag_cache_drain(struct page *page, unsigned int count) +{ + VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); + + if (page_ref_sub_and_test(page, count)) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(__page_frag_cache_drain); + +void *__page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align_mask) +{ + unsigned int size = PAGE_SIZE; + struct page *page; + int offset; + + if (unlikely(!nc->va)) { +refill: + page = __page_frag_cache_refill(nc, gfp_mask); + if (!page) + return NULL; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* Even if we own the page, we do not use atomic_set(). + * This would break get_page_unless_zero() users. + */ + page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); + + /* reset page count bias and offset to start of new frag */ + nc->pfmemalloc = page_is_pfmemalloc(page); + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + nc->offset = size; + } + + offset = nc->offset - fragsz; + if (unlikely(offset < 0)) { + page = virt_to_page(nc->va); + + if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) + goto refill; + + if (unlikely(nc->pfmemalloc)) { + free_unref_page(page, compound_order(page)); + goto refill; + } + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* OK, page count is 0, we can safely set it */ + set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); + + /* reset page count bias and offset to start of new frag */ + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + offset = size - fragsz; + if (unlikely(offset < 0)) { + /* + * The caller is trying to allocate a fragment + * with fragsz > PAGE_SIZE but the cache isn't big + * enough to satisfy the request, this may + * happen in low memory conditions. + * We don't release the cache page because + * it could make memory pressure worse + * so we simply return NULL here. + */ + return NULL; + } + } + + nc->pagecnt_bias--; + offset &= align_mask; + nc->offset = offset; + + return nc->va + offset; +} +EXPORT_SYMBOL(__page_frag_alloc_align); + +/* + * Frees a page fragment allocated out of either a compound or order 0 page. + */ +void page_frag_free(void *addr) +{ + struct page *page = virt_to_head_page(addr); + + if (unlikely(put_page_testzero(page))) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(page_frag_free); diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index 912d97b99107..13c44133e009 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -6,12 +6,12 @@ * Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> */ -#include <linux/mm.h> #include <linux/module.h> #include <linux/cpumask.h> #include <linux/completion.h> #include <linux/ptr_ring.h> #include <linux/kthread.h> +#include <linux/page_frag_cache.h> #define TEST_FAILED_PREFIX "page_frag_test failed: " -- 2.33.0

8 months

1
0
0 0

[PATCH v4 00/11] iommufd: Add vIOMMU infrastructure (Part-1)

by Nicolin Chen

This series introduces a new vIOMMU infrastructure and related ioctls. IOMMUFD has been using the HWPT infrastructure for all cases, including a nested IO page table support. Yet, there're limitations for an HWPT-based structure to support some advanced HW-accelerated features, such as CMDQV on NVIDIA Grace, and HW-accelerated vIOMMU on AMD. Even for a multi-IOMMU environment, it is not straightforward for nested HWPTs to share the same parent HWPT (stage-2 IO pagetable), with the HWPT infrastructure alone: a parent HWPT typically hold one stage-2 IO pagetable and tag it with only one ID in the cache entries. When sharing one large stage-2 IO pagetable across physical IOMMU instances, that one ID may not always be available across all the IOMMU instances. In other word, it's ideal for SW to have a different container for the stage-2 IO pagetable so it can hold another ID that's available. For this "different container", add vIOMMU, an additional layer to hold extra virtualization information: _______________________________________________________________________ | iommufd (with vIOMMU) | | | | [5] | | _____________ | | | | | | |----------------| vIOMMU | | | | | | | | | | | | | | [1] | | [4] [2] | | | ______ | | _____________ ________ | | | | | | [3] | | | | | | | | | IOAS |<---|(HWPT_PAGING)|<---| HWPT_NESTED |<--| DEVICE | | | | |______| |_____________| |_____________| |________| | | | | | | | | |______|________|______________|__________________|_______________|_____| | | | | | ______v_____ | ______v_____ ______v_____ ___v__ | struct | | PFN | (paging) | | (nested) | |struct| |iommu_device| |------>|iommu_domain|<----|iommu_domain|<----|device| |____________| storage|____________| |____________| |______| The vIOMMU object should be seen as a slice of a physical IOMMU instance that is passed to or shared with a VM. That can be some HW/SW resources: - Security namespace for guest owned ID, e.g. guest-controlled cache tags - Access to a sharable nesting parent pagetable across physical IOMMUs - Virtualization of various platforms IDs, e.g. RIDs and others - Delivery of paravirtualized invalidation - Direct assigned invalidation queues - Direct assigned interrupts - Non-affiliated event reporting On a multi-IOMMU system, the vIOMMU object must be instanced to the number of the physical IOMMUs that are passed to (via devices) a guest VM, while being able to hold the shareable parent HWPT. Each vIOMMU then just needs to allocate its own individual ID to tag its own cache: ---------------------------- ---------------- | | paging_hwpt0 | | hwpt_nested0 |--->| viommu0 ------------------ ---------------- | | IDx | ---------------------------- ---------------------------- ---------------- | | paging_hwpt0 | | hwpt_nested1 |--->| viommu1 ------------------ ---------------- | | IDy | ---------------------------- As an initial part-1, add IOMMUFD_CMD_VIOMMU_ALLOC ioctl for an allocation only. And implement it in arm-smmu-v3 driver as a real world use case. More vIOMMU-based structs and ioctls will be introduced in the follow-up series to support vDEVICE, vIRQ (vEVENT) and vQUEUE objects. Although we repurposed the vIOMMU object from an earlier RFC, just for a referece: https://lore.kernel.org/all/cover.1712978212.git.nicolinc@nvidia.com/ This series is on Github: https://github.com/nicolinc/iommufd/commits/iommufd_viommu_p1-v4 (paring QEMU branch for testing will be provided with the part2 series) Changelog v4 * Added "Reviewed-by" from Jason * Dropped IOMMU_VIOMMU_TYPE_DEFAULT support * Dropped iommufd_object_alloc_elm renamings * Renamed iommufd's viommu_api.c to driver.c * Reworked iommufd_viommu_alloc helper * Added a separate iommufd_hwpt_nested_alloc_for_viommu function for hwpt_nested allocations on a vIOMMU, and added comparison between viommu->iommu_dev->ops and dev_iommu_ops(idev->dev) * Replaced s2_parent with vsmmu in arm_smmu_nested_domain * Replaced domain_alloc_user in iommu_ops with domain_alloc_nested in viommu_ops * Replaced wait_queue_head_t with a completion, to delay the unplug of mock_iommu_dev * Corrected documentation graph that was missing struct iommu_device * Added an iommufd_verify_unfinalized_object helper to verify driver- allocated vIOMMU/vDEVICE objects * Added missing test cases for TEST_LENGTH and fail_nth v3 https://lore.kernel.org/all/cover.1728491453.git.nicolinc@nvidia.com/ * Rebased on top of Jason's nesting v3 series https://lore.kernel.org/all/0-v3-e2e16cd7467f+2a6a1-smmuv3_nesting_jgg@nvid… * Split the series into smaller parts * Added Jason's Reviewed-by * Added back viommu->iommu_dev * Added support for driver-allocated vIOMMU v.s. core-allocated * Dropped arm_smmu_cache_invalidate_user * Added an iommufd_test_wait_for_users() in selftest * Reworked test code to make viommu an individual FIXTURE * Added missing TEST_LENGTH case for the new ioctl command v2 https://lore.kernel.org/all/cover.1724776335.git.nicolinc@nvidia.com/ * Limited vdev_id to one per idev * Added a rw_sem to protect the vdev_id list * Reworked driver-level APIs with proper lockings * Added a new viommu_api file for IOMMUFD_DRIVER config * Dropped useless iommu_dev point from the viommu structure * Added missing index numnbers to new types in the uAPI header * Dropped IOMMU_VIOMMU_INVALIDATE uAPI; Instead, reuse the HWPT one * Reworked mock_viommu_cache_invalidate() using the new iommu helper * Reordered details of set/unset_vdev_id handlers for proper lockings v1 https://lore.kernel.org/all/cover.1723061377.git.nicolinc@nvidia.com/ Thanks! Nicolin Nicolin Chen (11): iommufd: Move struct iommufd_object to public iommufd header iommufd: Introduce IOMMUFD_OBJ_VIOMMU and its related struct iommufd: Add iommufd_verify_unfinalized_object iommufd/viommu: Add IOMMU_VIOMMU_ALLOC ioctl iommufd: Add domain_alloc_nested op to iommufd_viommu_ops iommufd: Allow pt_id to carry viommu_id for IOMMU_HWPT_ALLOC iommufd/selftest: Add refcount to mock_iommu_device iommufd/selftest: Add IOMMU_VIOMMU_TYPE_SELFTEST iommufd/selftest: Add IOMMU_VIOMMU_ALLOC test coverage Documentation: userspace-api: iommufd: Update vIOMMU iommu/arm-smmu-v3: Add IOMMU_VIOMMU_TYPE_ARM_SMMUV3 support drivers/iommu/iommufd/Makefile | 5 +- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 26 +++--- drivers/iommu/iommufd/iommufd_private.h | 36 ++------ drivers/iommu/iommufd/iommufd_test.h | 2 + include/linux/iommu.h | 14 +++ include/linux/iommufd.h | 89 +++++++++++++++++++ include/uapi/linux/iommufd.h | 56 ++++++++++-- tools/testing/selftests/iommu/iommufd_utils.h | 28 ++++++ .../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 79 ++++++++++------ drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 9 +- drivers/iommu/iommufd/driver.c | 38 ++++++++ drivers/iommu/iommufd/hw_pagetable.c | 69 +++++++++++++- drivers/iommu/iommufd/main.c | 58 ++++++------ drivers/iommu/iommufd/selftest.c | 73 +++++++++++++-- drivers/iommu/iommufd/viommu.c | 85 ++++++++++++++++++ tools/testing/selftests/iommu/iommufd.c | 78 ++++++++++++++++ .../selftests/iommu/iommufd_fail_nth.c | 11 +++ Documentation/userspace-api/iommufd.rst | 69 +++++++++++++- 18 files changed, 701 insertions(+), 124 deletions(-) create mode 100644 drivers/iommu/iommufd/driver.c create mode 100644 drivers/iommu/iommufd/viommu.c -- 2.43.0

8 months

4
35
0 0

[PATCH] selftests/mount_setattr: fix idmap_mount_tree_invalid failed to run

by zhouyuhang

From: zhouyuhang <zhouyuhang(a)kylinos.cn> Test case idmap_mount_tree_invalid failed to run on the newer kernel with the following output: # RUN mount_setattr_idmapped.idmap_mount_tree_invalid ... # mount_setattr_test.c:1428:idmap_mount_tree_invalid:Expected sys_mount_setattr(open_tree_fd, "", AT_EMPTY_PATH, &attr, sizeof(attr)) (0) ! = 0 (0) # idmap_mount_tree_invalid: Test terminated by assertion This is because tmpfs is mounted at "/mnt/A", and tmpfs already contains the flag FS_ALLOW_IDMAP after the commit 7a80e5b8c6fa ("shmem: support idmapped mounts for tmpfs"). So calling sys_mount_setattr here returns 0 instead of -EINVAL as expected. Ramfs is mounted at "/mnt/B" and does not support idmap mounts. So we can use "/mnt/B" instead of "/mnt/A" to make the test run successfully with the following output: # Starting 1 tests from 1 test cases. # RUN mount_setattr_idmapped.idmap_mount_tree_invalid ... # OK mount_setattr_idmapped.idmap_mount_tree_invalid ok 1 mount_setattr_idmapped.idmap_mount_tree_invalid # PASSED: 1 / 1 tests passed. Signed-off-by: zhouyuhang <zhouyuhang(a)kylinos.cn> --- tools/testing/selftests/mount_setattr/mount_setattr_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/mount_setattr/mount_setattr_test.c b/tools/testing/selftests/mount_setattr/mount_setattr_test.c index c6a8c732b802..54552c19bc24 100644 --- a/tools/testing/selftests/mount_setattr/mount_setattr_test.c +++ b/tools/testing/selftests/mount_setattr/mount_setattr_test.c @@ -1414,7 +1414,7 @@ TEST_F(mount_setattr_idmapped, idmap_mount_tree_invalid) ASSERT_EQ(expected_uid_gid(-EBADF, "/tmp/B/b", 0, 0, 0), 0); ASSERT_EQ(expected_uid_gid(-EBADF, "/tmp/B/BB/b", 0, 0, 0), 0); - open_tree_fd = sys_open_tree(-EBADF, "/mnt/A", + open_tree_fd = sys_open_tree(-EBADF, "/mnt/B", AT_RECURSIVE | AT_EMPTY_PATH | AT_NO_AUTOMOUNT | -- 2.27.0

8 months, 1 week

2
3
0 0

[PATCH v2] selftests: tmpfs: Add kselftest support to tmpfs

by Shivam Chaudhary

Add kselftest support for open, linkat, unshare, mount tests - Replace direct error handling with `ksft_test_result_*` macros for better reporting of test outcomes. - Add `ksft_print_header()` and `ksft_set_plan()` to structure test outputs more effectively. - Introduce the helper function `is_unshare()` to handle unshare() related checks. - Improve the test flow by adding more detailed pass/fail reporting for unshare, mounting, file opening, and linking operations. - Skip the test if it's not run as root, providing an appropriate Warning. Test logs: Before change: - Without root error: unshare, errno 1 - With root No, output After change: - Without root TAP version 13 1..1 ok 1 # SKIP This test needs root to run - With root TAP version 13 1..1 ok 1 unshare(): we have a new mount namespace. 1..2 ok 2 mount(): Root filesystem private mount: Success 1..3 ok 3 mount(): Mounting tmpfs on /tmp: Success 1..4 ok 4 openat(): Open first temporary file: Success 1..5 ok 5 linkat(): Linking the temporary file: Success 1..6 ok 6 openat(): Opening the second temporary file: Success # Totals: pass:6 fail:0 xfail:0 xpass:0 skip:0 error:0 Signed-off-by: Shivam Chaudhary <cvam0000(a)gmail.com> --- Notes: Changes in v2: - Make the commit message more clear. link to v1: https://lore.kernel.org/all/20241024200228.1075840-1-cvam0000@gmail.com/T/#u .../selftests/tmpfs/bug-link-o-tmpfile.c | 72 +++++++++++++++---- 1 file changed, 58 insertions(+), 14 deletions(-) diff --git a/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c b/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c index b5c3ddb90942..26dea19c1614 100644 --- a/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c +++ b/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c @@ -23,45 +23,89 @@ #include <sys/mount.h> #include <unistd.h> -int main(void) -{ - int fd; +#include "../kselftest.h" - if (unshare(CLONE_NEWNS) == -1) { +static int is_unshare(int flag) +{ + if (unshare(flag) == -1) { if (errno == ENOSYS || errno == EPERM) { - fprintf(stderr, "error: unshare, errno %d\n", errno); - return 4; + ksft_test_result_fail("error: unshare, errno %d\n", errno); + return -1; // Return -1 for failure } fprintf(stderr, "error: unshare, errno %d\n", errno); + return -1; + } + + return 0; // Return 0 for success +} + +int main(void) +{ + int fd; + + // Setting up kselftest framework + ksft_print_header(); + ksft_set_plan(1); + + // Check if test is run as root + if (geteuid()) { + ksft_test_result_skip("This test needs root to run!\n"); return 1; } - if (mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) == -1) { - fprintf(stderr, "error: mount '/', errno %d\n", errno); + + if (is_unshare(CLONE_NEWNS) == 0) { + ksft_test_result_pass("unshare(): we have a new mount namespace.\n"); + } else { + ksft_test_result_fail("unshare(): failed\n"); return 1; } + ksft_set_plan(2); + + if (mount(NULL, "/", NULL, MS_PRIVATE | MS_REC, NULL) == -1) { + ksft_test_result_fail("mount(): Root filesystem private mount: Fail %d\n", errno); + return 1; + } else { + ksft_test_result_pass("mount(): Root filesystem private mount: Success\n"); + } + + ksft_set_plan(3); /* Our heroes: 1 root inode, 1 O_TMPFILE inode, 1 permanent inode. */ if (mount(NULL, "/tmp", "tmpfs", 0, "nr_inodes=3") == -1) { - fprintf(stderr, "error: mount tmpfs, errno %d\n", errno); + ksft_test_result_fail("mount(): Mounting tmpfs on /tmp: Fail %d\n", errno); return 1; + } else { + ksft_test_result_pass("mount(): Mounting tmpfs on /tmp: Success\n"); } - fd = openat(AT_FDCWD, "/tmp", O_WRONLY|O_TMPFILE, 0600); + ksft_set_plan(4); + fd = openat(AT_FDCWD, "/tmp", O_WRONLY | O_TMPFILE, 0600); if (fd == -1) { - fprintf(stderr, "error: open 1, errno %d\n", errno); + ksft_test_result_fail("openat(): Open first temporary file: Fail %d\n", errno); return 1; + } else { + ksft_test_result_pass("openat(): Open first temporary file: Success\n"); } + + ksft_set_plan(5); if (linkat(fd, "", AT_FDCWD, "/tmp/1", AT_EMPTY_PATH) == -1) { - fprintf(stderr, "error: linkat, errno %d\n", errno); + ksft_test_result_fail("linkat(): Linking the temporary file: Fail %d\n", errno); + close(fd); // Ensure fd is closed on failure return 1; + } else { + ksft_test_result_pass("linkat(): Linking the temporary file: Success\n"); } close(fd); - fd = openat(AT_FDCWD, "/tmp", O_WRONLY|O_TMPFILE, 0600); + ksft_set_plan(6); + fd = openat(AT_FDCWD, "/tmp", O_WRONLY | O_TMPFILE, 0600); if (fd == -1) { - fprintf(stderr, "error: open 2, errno %d\n", errno); + ksft_test_result_fail("openat(): Opening the second temporary file: Fail %d\n", errno); return 1; + } else { + ksft_test_result_pass("openat(): Opening the second temporary file: Success\n"); } + ksft_exit_pass(); return 0; } -- 2.34.1

8 months, 1 week

2
1
0 0

[PATCH v2] lib/math: Add int_sqrt test suite

by Luis Felipe Hernandez

Adds test suite for integer based square root function. The test suite is designed to verify the correctness of the int_sqrt math library function. Signed-off-by: Luis Felipe Hernandez <luis.hernandez093(a)gmail.com> --- lib/Kconfig.debug | 16 +++++++++++ lib/math/Makefile | 1 + lib/math/tests/Makefile | 1 + lib/math/tests/int_sqrt_kunit.c | 51 +++++++++++++++++++++++++++++++++ 4 files changed, 69 insertions(+) create mode 100644 lib/math/tests/int_sqrt_kunit.c diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 7312ae7c3cc5..772c681dff3e 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2993,6 +2993,22 @@ config TEST_OBJPOOL If unsure, say N. +config INT_SQRT_KUNIT_TEST + tristate "Integer square root test test" if !KUNIT_ALL_TESTS + depends on KUNIT + default KUNIT_ALL_TESTS + help + This option enables the KUnit test suite for the int_sqrt function, + which performs square root calculation. The test suite checks + various scenarios, including edge cases, to ensure correctness. + + Enabling this option will include tests that check various scenarios + and edge cases to ensure the accuracy and reliability of the square root + function. + + If unsure, say N + + endif # RUNTIME_TESTING_MENU config ARCH_USE_MEMTEST diff --git a/lib/math/Makefile b/lib/math/Makefile index 3ef11305f8d2..25bcb968b369 100644 --- a/lib/math/Makefile +++ b/lib/math/Makefile @@ -9,3 +9,4 @@ obj-$(CONFIG_INT_POW_TEST) += tests/int_pow_kunit.o obj-$(CONFIG_TEST_DIV64) += test_div64.o obj-$(CONFIG_TEST_MULDIV64) += test_mul_u64_u64_div_u64.o obj-$(CONFIG_RATIONAL_KUNIT_TEST) += rational-test.o +obj-y += tests/ diff --git a/lib/math/tests/Makefile b/lib/math/tests/Makefile index 6a169123320a..e1a79f093b2d 100644 --- a/lib/math/tests/Makefile +++ b/lib/math/tests/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_INT_POW_TEST) += int_pow_kunit.o +obj-$(CONFIG_INT_SQRT_KUNIT_TEST) += int_sqrt_kunit.o diff --git a/lib/math/tests/int_sqrt_kunit.c b/lib/math/tests/int_sqrt_kunit.c new file mode 100644 index 000000000000..a93aba31cd05 --- /dev/null +++ b/lib/math/tests/int_sqrt_kunit.c @@ -0,0 +1,51 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <kunit/test.h> +#include <linux/math.h> +#include <linux/module.h> +#include <linux/string.h> +#include <limits.h> + +struct test_case_params { + unsigned long x; + unsigned long expected_result; + const char *name; +}; + +static const struct test_case_params params[] = { + { 0, 0, "edge-case: square root of 0" }, + { 4, 2, "perfect square: square root of 4" }, + { 81, 9, "perfect square: square root of 9" }, + { 2, 1, "non-perfect square: square root of 2" }, + { 5, 2, "non-perfect square: square root of 5"}, + { ULONG_MAX, 4294967295, "large input"}, +}; + +static void get_desc(const struct test_case_params *tc, char *desc) +{ + strscpy(desc, tc->name, KUNIT_PARAM_DESC_SIZE); +} + +KUNIT_ARRAY_PARAM(int_sqrt, params, get_desc); + +static void int_sqrt_test(struct kunit *test) +{ + const struct test_case_params *tc = (const struct test_case_params *)test->param_value; + + KUNIT_EXPECT_EQ(test, tc->expected_result, int_sqrt(tc->x)); +} + +static struct kunit_case math_int_sqrt_test_cases[] = { + KUNIT_CASE_PARAM(int_sqrt_test, int_sqrt_gen_params), + {} +}; + +static struct kunit_suite int_sqrt_test_suite = { + .name = "math-int_sqrt", + .test_cases = math_int_sqrt_test_cases, +}; + +kunit_test_suites(&int_sqrt_test_suite); + +MODULE_DESCRIPTION("math.int_sqrt KUnit test suite"); +MODULE_LICENSE("GPL"); -- 2.47.0

8 months, 1 week

3
5
0 0

[PATCH v5 0/5] introduce PIDFD_SELF* sentinels

by Lorenzo Stoakes

If you wish to utilise a pidfd interface to refer to the current process or thread it is rather cumbersome, requiring something like: int pidfd = pidfd_open(getpid(), 0 or PIDFD_THREAD); ... close(pidfd); Or the equivalent call opening /proc/self. It is more convenient to use a sentinel value to indicate to an interface that accepts a pidfd that we simply wish to refer to the current process thread. This series introduces sentinels for this purposes which can be passed as the pidfd in this instance rather than having to establish a dummy fd for this purpose. It is useful to refer to both the current thread from the userland's perspective for which we use PIDFD_SELF, and the current process from the userland's perspective, for which we use PIDFD_SELF_PROCESS. There is unfortunately some confusion between the kernel and userland as to what constitutes a process - a thread from the userland perspective is a process in userland, and a userland process is a thread group (more specifically the thread group leader from the kernel perspective). We therefore alias things thusly: * PIDFD_SELF_THREAD aliased by PIDFD_SELF - use PIDTYPE_PID. * PIDFD_SELF_THREAD_GROUP alised by PIDFD_SELF_PROCESS - use PIDTYPE_TGID. In all of the kernel code we refer to PIDFD_SELF_THREAD and PIDFD_SELF_THREAD_GROUP. However we expect users to use PIDFD_SELF and PIDFD_SELF_PROCESS. This matters for cases where, for instance, a user unshare()'s FDs or does thread-specific signal handling and where the user would be hugely confused if the FDs referenced or signal processed referred to the thread group leader rather than the individual thread. We ensure that pidfd_send_signal() and pidfd_getfd() work correctly, and assert as much in selftests. All other interfaces except setns() will work implicitly with this new interface, however it doesn't make sense to test waitid(P_PIDFD, ...) as waiting on ourselves is a blocking operation. In the case of setns() we explicitly disallow use of PIDFD_SELF* as it doesn't make sense to obtain the namespaces of our own process, and it would require work to implement this functionality there that would be of no use. We also do not provide the ability to utilise PIDFD_SELF* in ordinary fd operations such as open() or poll(), as this would require extensive work and be of no real use. v5: * Fixup self test dependencies on pidfd/pidfd.h. v4: * Avoid returning an fd in the __pidfd_get_pid() function as pointed out by Christian, instead simply always pin the pid and maintain fd scope in the helper alone. * Add wrapper header file in tools/include/linux to allow for import of UAPI pidfd.h header without encountering the collision between system fcntl.h and linux/fcntl.h as discussed with Shuah and John. * Fixup tests to import the UAPI pidfd.h header working around conflicts between system fcntl.h and linux/fcntl.h which the UAPI pidfd.h imports, as reported by Shuah. * Use an int for pidfd_is_self_sentinel() to avoid any dependency on stdbool.h in userland. https://lore.kernel.org/linux-mm/cover.1729198898.git.lorenzo.stoakes@oracl… v3: * Do not fput() an invalid fd as reported by kernel test bot. * Fix unintended churn from moving variable declaration. https://lore.kernel.org/linux-mm/cover.1729073310.git.lorenzo.stoakes@oracl… v2: * Fix tests as reported by Shuah. * Correct RFC version lore link. https://lore.kernel.org/linux-mm/cover.1728643714.git.lorenzo.stoakes@oracl… Non-RFC v1: * Removed RFC tag - there seems to be general consensus that this change is a good idea, but perhaps some debate to be had on implementation. It seems sensible then to move forward with the RFC flag removed. * Introduced PIDFD_SELF_THREAD, PIDFD_SELF_THREAD_GROUP and their aliases PIDFD_SELF and PIDFD_SELF_PROCESS respectively. * Updated testing accordingly. https://lore.kernel.org/linux-mm/cover.1728578231.git.lorenzo.stoakes@oracl… RFC version: https://lore.kernel.org/linux-mm/cover.1727644404.git.lorenzo.stoakes@oracl… Lorenzo Stoakes (5): pidfd: extend pidfd_get_pid() and de-duplicate pid lookup pidfd: add PIDFD_SELF_* sentinels to refer to own thread/process tools: testing: separate out wait_for_pid() into helper header selftests: pidfd: add pidfd.h UAPI wrapper selftests: pidfd: add tests for PIDFD_SELF_* include/linux/pid.h | 34 ++++- include/uapi/linux/pidfd.h | 15 ++ kernel/exit.c | 3 +- kernel/nsproxy.c | 1 + kernel/pid.c | 65 +++++--- kernel/signal.c | 29 +--- tools/include/linux/pidfd.h | 14 ++ tools/testing/selftests/cgroup/test_kill.c | 2 +- .../pid_namespace/regression_enomem.c | 2 +- tools/testing/selftests/pidfd/Makefile | 3 +- tools/testing/selftests/pidfd/pidfd.h | 28 +--- .../selftests/pidfd/pidfd_getfd_test.c | 141 ++++++++++++++++++ tools/testing/selftests/pidfd/pidfd_helpers.h | 39 +++++ .../selftests/pidfd/pidfd_setns_test.c | 11 ++ tools/testing/selftests/pidfd/pidfd_test.c | 76 ++++++++-- 15 files changed, 375 insertions(+), 88 deletions(-) create mode 100644 tools/include/linux/pidfd.h create mode 100644 tools/testing/selftests/pidfd/pidfd_helpers.h -- 2.47.0

8 months, 1 week

3
15
0 0

[PATCH net-next 1/2] net: netconsole: selftests: Change the IP subnet

by Breno Leitao

Use a less populated IP range to run the tests, as suggested by Petr in Link: https://lore.kernel.org/netdev/87ikvukv3s.fsf@nvidia.com/. Suggested-by: Petr Machata <petrm(a)nvidia.com> Signed-off-by: Breno Leitao <leitao(a)debian.org> --- tools/testing/selftests/drivers/net/netcons_basic.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/drivers/net/netcons_basic.sh b/tools/testing/selftests/drivers/net/netcons_basic.sh index 06021b2059b7..4ad1e216c6b0 100755 --- a/tools/testing/selftests/drivers/net/netcons_basic.sh +++ b/tools/testing/selftests/drivers/net/netcons_basic.sh @@ -20,9 +20,9 @@ SCRIPTDIR=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")") # Simple script to test dynamic targets in netconsole SRCIF="" # to be populated later -SRCIP=192.168.1.1 +SRCIP=192.168.2.1 DSTIF="" # to be populated later -DSTIP=192.168.1.2 +DSTIP=192.168.2.2 PORT="6666" MSG="netconsole selftest" -- 2.43.5

8 months, 1 week

2
3
0 0

Re: [PATCH V7 9/9] iommufd: map file selftest

by Steven Sistare

cc linux-selftest - Steve On 10/25/2024 9:11 AM, Steve Sistare wrote: > Add test cases to exercise IOMMU_IOAS_MAP_FILE. > > Signed-off-by: Steve Sistare <steven.sistare(a)oracle.com> > Reviewed-by: Nicolin Chen <nicolinc(a)nvidia.com> > --- > tools/testing/selftests/iommu/iommufd.c | 124 ++++++++++++++++++++--- > tools/testing/selftests/iommu/iommufd_fail_nth.c | 39 +++++++ > tools/testing/selftests/iommu/iommufd_utils.h | 57 +++++++++++ > 3 files changed, 205 insertions(+), 15 deletions(-) > > diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c > index 4927b9a..88b92bb 100644 > --- a/tools/testing/selftests/iommu/iommufd.c > +++ b/tools/testing/selftests/iommu/iommufd.c > @@ -1,5 +1,6 @@ > // SPDX-License-Identifier: GPL-2.0-only > /* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES */ > +#include <asm/unistd.h> > #include <stdlib.h> > #include <sys/mman.h> > #include <sys/eventfd.h> > @@ -49,6 +50,9 @@ static __attribute__((constructor)) void setup_sizes(void) > vrc = mmap(buffer, BUFFER_SIZE, PROT_READ | PROT_WRITE, > MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0); > assert(vrc == buffer); > + > + mfd_buffer = memfd_mmap(BUFFER_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, > + &mfd); > } > > FIXTURE(iommufd) > @@ -128,6 +132,7 @@ static __attribute__((constructor)) void setup_sizes(void) > TEST_LENGTH(iommu_ioas_unmap, IOMMU_IOAS_UNMAP, length); > TEST_LENGTH(iommu_option, IOMMU_OPTION, val64); > TEST_LENGTH(iommu_vfio_ioas, IOMMU_VFIO_IOAS, __reserved); > + TEST_LENGTH(iommu_ioas_map_file, IOMMU_IOAS_MAP_FILE, iova); > #undef TEST_LENGTH > } > > @@ -1372,6 +1377,7 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > { > unsigned int mock_domains; > bool hugepages; > + bool file; > }; > > FIXTURE_SETUP(iommufd_mock_domain) > @@ -1410,26 +1416,45 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > { > .mock_domains = 1, > .hugepages = false, > + .file = false, > }; > > FIXTURE_VARIANT_ADD(iommufd_mock_domain, two_domains) > { > .mock_domains = 2, > .hugepages = false, > + .file = false, > }; > > FIXTURE_VARIANT_ADD(iommufd_mock_domain, one_domain_hugepage) > { > .mock_domains = 1, > .hugepages = true, > + .file = false, > }; > > FIXTURE_VARIANT_ADD(iommufd_mock_domain, two_domains_hugepage) > { > .mock_domains = 2, > .hugepages = true, > + .file = false, > }; > > +FIXTURE_VARIANT_ADD(iommufd_mock_domain, one_domain_file) > +{ > + .mock_domains = 1, > + .hugepages = false, > + .file = true, > +}; > + > +FIXTURE_VARIANT_ADD(iommufd_mock_domain, one_domain_file_hugepage) > +{ > + .mock_domains = 1, > + .hugepages = true, > + .file = true, > +}; > + > + > /* Have the kernel check that the user pages made it to the iommu_domain */ > #define check_mock_iova(_ptr, _iova, _length) \ > ({ \ > @@ -1455,7 +1480,10 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > } \ > }) > > -TEST_F(iommufd_mock_domain, basic) > +static void > +test_basic_mmap(struct __test_metadata *_metadata, > + struct _test_data_iommufd_mock_domain *self, > + const struct _fixture_variant_iommufd_mock_domain *variant) > { > size_t buf_size = self->mmap_buf_size; > uint8_t *buf; > @@ -1478,6 +1506,40 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > test_err_ioctl_ioas_map(EFAULT, buf, buf_size, &iova); > } > > +static void > +test_basic_file(struct __test_metadata *_metadata, > + struct _test_data_iommufd_mock_domain *self, > + const struct _fixture_variant_iommufd_mock_domain *variant) > +{ > + size_t buf_size = self->mmap_buf_size; > + uint8_t *buf; > + __u64 iova; > + int mfd_tmp; > + int prot = PROT_READ | PROT_WRITE; > + > + /* Simple one page map */ > + test_ioctl_ioas_map_file(mfd, 0, PAGE_SIZE, &iova); > + check_mock_iova(mfd_buffer, iova, PAGE_SIZE); > + > + buf = memfd_mmap(buf_size, prot, MAP_SHARED, &mfd_tmp); > + ASSERT_NE(MAP_FAILED, buf); > + > + test_err_ioctl_ioas_map_file(EINVAL, mfd_tmp, 0, buf_size + 1, &iova); > + > + ASSERT_EQ(0, ftruncate(mfd_tmp, 0)); > + test_err_ioctl_ioas_map_file(EINVAL, mfd_tmp, 0, buf_size, &iova); > + > + close(mfd_tmp); > +} > + > +TEST_F(iommufd_mock_domain, basic) > +{ > + if (variant->file) > + test_basic_file(_metadata, self, variant); > + else > + test_basic_mmap(_metadata, self, variant); > +} > + > TEST_F(iommufd_mock_domain, ro_unshare) > { > uint8_t *buf; > @@ -1513,9 +1575,13 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > unsigned int start; > unsigned int end; > uint8_t *buf; > + int prot = PROT_READ | PROT_WRITE; > + int mfd; > > - buf = mmap(0, buf_size, PROT_READ | PROT_WRITE, self->mmap_flags, -1, > - 0); > + if (variant->file) > + buf = memfd_mmap(buf_size, prot, MAP_SHARED, &mfd); > + else > + buf = mmap(0, buf_size, prot, self->mmap_flags, -1, 0); > ASSERT_NE(MAP_FAILED, buf); > check_refs(buf, buf_size, 0); > > @@ -1532,7 +1598,12 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > size_t length = end - start; > __u64 iova; > > - test_ioctl_ioas_map(buf + start, length, &iova); > + if (variant->file) { > + test_ioctl_ioas_map_file(mfd, start, length, > + &iova); > + } else { > + test_ioctl_ioas_map(buf + start, length, &iova); > + } > check_mock_iova(buf + start, iova, length); > check_refs(buf + start / PAGE_SIZE * PAGE_SIZE, > end / PAGE_SIZE * PAGE_SIZE - > @@ -1544,6 +1615,8 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > } > check_refs(buf, buf_size, 0); > ASSERT_EQ(0, munmap(buf, buf_size)); > + if (variant->file) > + close(mfd); > } > > TEST_F(iommufd_mock_domain, all_aligns_copy) > @@ -1554,9 +1627,13 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > unsigned int start; > unsigned int end; > uint8_t *buf; > + int prot = PROT_READ | PROT_WRITE; > + int mfd; > > - buf = mmap(0, buf_size, PROT_READ | PROT_WRITE, self->mmap_flags, -1, > - 0); > + if (variant->file) > + buf = memfd_mmap(buf_size, prot, MAP_SHARED, &mfd); > + else > + buf = mmap(0, buf_size, prot, self->mmap_flags, -1, 0); > ASSERT_NE(MAP_FAILED, buf); > check_refs(buf, buf_size, 0); > > @@ -1575,7 +1652,12 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > uint32_t mock_stdev_id; > __u64 iova; > > - test_ioctl_ioas_map(buf + start, length, &iova); > + if (variant->file) { > + test_ioctl_ioas_map_file(mfd, start, length, > + &iova); > + } else { > + test_ioctl_ioas_map(buf + start, length, &iova); > + } > > /* Add and destroy a domain while the area exists */ > old_id = self->hwpt_ids[1]; > @@ -1596,15 +1678,18 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > } > check_refs(buf, buf_size, 0); > ASSERT_EQ(0, munmap(buf, buf_size)); > + if (variant->file) > + close(mfd); > } > > TEST_F(iommufd_mock_domain, user_copy) > { > + void *buf = variant->file ? mfd_buffer : buffer; > struct iommu_test_cmd access_cmd = { > .size = sizeof(access_cmd), > .op = IOMMU_TEST_OP_ACCESS_PAGES, > .access_pages = { .length = BUFFER_SIZE, > - .uptr = (uintptr_t)buffer }, > + .uptr = (uintptr_t)buf }, > }; > struct iommu_ioas_copy copy_cmd = { > .size = sizeof(copy_cmd), > @@ -1623,9 +1708,13 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > > /* Pin the pages in an IOAS with no domains then copy to an IOAS with domains */ > test_ioctl_ioas_alloc(&ioas_id); > - test_ioctl_ioas_map_id(ioas_id, buffer, BUFFER_SIZE, > - &copy_cmd.src_iova); > - > + if (variant->file) { > + test_ioctl_ioas_map_id_file(ioas_id, mfd, 0, BUFFER_SIZE, > + &copy_cmd.src_iova); > + } else { > + test_ioctl_ioas_map_id(ioas_id, buf, BUFFER_SIZE, > + &copy_cmd.src_iova); > + } > test_cmd_create_access(ioas_id, &access_cmd.id, > MOCK_FLAGS_ACCESS_CREATE_NEEDS_PIN_PAGES); > > @@ -1635,12 +1724,17 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > &access_cmd)); > copy_cmd.src_ioas_id = ioas_id; > ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, &copy_cmd)); > - check_mock_iova(buffer, MOCK_APERTURE_START, BUFFER_SIZE); > + check_mock_iova(buf, MOCK_APERTURE_START, BUFFER_SIZE); > > /* Now replace the ioas with a new one */ > test_ioctl_ioas_alloc(&new_ioas_id); > - test_ioctl_ioas_map_id(new_ioas_id, buffer, BUFFER_SIZE, > - &copy_cmd.src_iova); > + if (variant->file) { > + test_ioctl_ioas_map_id_file(new_ioas_id, mfd, 0, BUFFER_SIZE, > + &copy_cmd.src_iova); > + } else { > + test_ioctl_ioas_map_id(new_ioas_id, buf, BUFFER_SIZE, > + &copy_cmd.src_iova); > + } > test_cmd_access_replace_ioas(access_cmd.id, new_ioas_id); > > /* Destroy the old ioas and cleanup copied mapping */ > @@ -1654,7 +1748,7 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > &access_cmd)); > copy_cmd.src_ioas_id = new_ioas_id; > ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, &copy_cmd)); > - check_mock_iova(buffer, MOCK_APERTURE_START, BUFFER_SIZE); > + check_mock_iova(buf, MOCK_APERTURE_START, BUFFER_SIZE); > > test_cmd_destroy_access_pages( > access_cmd.id, access_cmd.access_pages.out_access_pages_id); > diff --git a/tools/testing/selftests/iommu/iommufd_fail_nth.c b/tools/testing/selftests/iommu/iommufd_fail_nth.c > index c5d5e69..2d7d016 100644 > --- a/tools/testing/selftests/iommu/iommufd_fail_nth.c > +++ b/tools/testing/selftests/iommu/iommufd_fail_nth.c > @@ -47,6 +47,9 @@ static __attribute__((constructor)) void setup_buffer(void) > > buffer = mmap(0, BUFFER_SIZE, PROT_READ | PROT_WRITE, > MAP_SHARED | MAP_ANONYMOUS, -1, 0); > + > + mfd_buffer = memfd_mmap(BUFFER_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, > + &mfd); > } > > /* > @@ -331,6 +334,42 @@ void __fail_nth_enable(struct __test_metadata *_metadata, > return 0; > } > > +/* iopt_area_fill_domains() and iopt_area_fill_domain() */ > +TEST_FAIL_NTH(basic_fail_nth, map_file_domain) > +{ > + uint32_t ioas_id; > + __u32 stdev_id; > + __u32 hwpt_id; > + __u64 iova; > + > + self->fd = open("/dev/iommu", O_RDWR); > + if (self->fd == -1) > + return -1; > + > + if (_test_ioctl_ioas_alloc(self->fd, &ioas_id)) > + return -1; > + > + if (_test_ioctl_set_temp_memory_limit(self->fd, 32)) > + return -1; > + > + fail_nth_enable(); > + > + if (_test_cmd_mock_domain(self->fd, ioas_id, &stdev_id, &hwpt_id, NULL)) > + return -1; > + > + if (_test_ioctl_ioas_map_file(self->fd, ioas_id, mfd, 0, 262144, &iova, > + IOMMU_IOAS_MAP_WRITEABLE | > + IOMMU_IOAS_MAP_READABLE)) > + return -1; > + > + if (_test_ioctl_destroy(self->fd, stdev_id)) > + return -1; > + > + if (_test_cmd_mock_domain(self->fd, ioas_id, &stdev_id, &hwpt_id, NULL)) > + return -1; > + return 0; > +} > + > TEST_FAIL_NTH(basic_fail_nth, map_two_domains) > { > uint32_t ioas_id; > diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h > index 40f6f14..6a11c26 100644 > --- a/tools/testing/selftests/iommu/iommufd_utils.h > +++ b/tools/testing/selftests/iommu/iommufd_utils.h > @@ -40,12 +40,28 @@ static inline bool test_bit(unsigned int nr, unsigned long *addr) > static void *buffer; > static unsigned long BUFFER_SIZE; > > +static void *mfd_buffer; > +static int mfd; > + > static unsigned long PAGE_SIZE; > > #define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER)) > #define offsetofend(TYPE, MEMBER) \ > (offsetof(TYPE, MEMBER) + sizeof_field(TYPE, MEMBER)) > > +static inline void *memfd_mmap(size_t length, int prot, int flags, int *mfd_p) > +{ > + int mfd_flags = (flags & MAP_HUGETLB) ? MFD_HUGETLB : 0; > + int mfd = memfd_create("buffer", mfd_flags); > + > + if (mfd <= 0) > + return MAP_FAILED; > + if (ftruncate(mfd, length)) > + return MAP_FAILED; > + *mfd_p = mfd; > + return mmap(0, length, prot, flags, mfd, 0); > +} > + > /* > * Have the kernel check the refcount on pages. I don't know why a freshly > * mmap'd anon non-compound page starts out with a ref of 3 > @@ -589,6 +605,47 @@ static int _test_ioctl_ioas_unmap(int fd, unsigned int ioas_id, uint64_t iova, > EXPECT_ERRNO(_errno, _test_ioctl_ioas_unmap(self->fd, self->ioas_id, \ > iova, length, NULL)) > > +static int _test_ioctl_ioas_map_file(int fd, unsigned int ioas_id, int mfd, > + size_t start, size_t length, __u64 *iova, > + unsigned int flags) > +{ > + struct iommu_ioas_map_file cmd = { > + .size = sizeof(cmd), > + .flags = flags, > + .ioas_id = ioas_id, > + .fd = mfd, > + .start = start, > + .length = length, > + }; > + int ret; > + > + if (flags & IOMMU_IOAS_MAP_FIXED_IOVA) > + cmd.iova = *iova; > + > + ret = ioctl(fd, IOMMU_IOAS_MAP_FILE, &cmd); > + *iova = cmd.iova; > + return ret; > +} > + > +#define test_ioctl_ioas_map_file(mfd, start, length, iova_p) \ > + ASSERT_EQ(0, \ > + _test_ioctl_ioas_map_file( \ > + self->fd, self->ioas_id, mfd, start, length, iova_p, \ > + IOMMU_IOAS_MAP_WRITEABLE | IOMMU_IOAS_MAP_READABLE)) > + > +#define test_err_ioctl_ioas_map_file(_errno, mfd, start, length, iova_p) \ > + EXPECT_ERRNO( \ > + _errno, \ > + _test_ioctl_ioas_map_file( \ > + self->fd, self->ioas_id, mfd, start, length, iova_p, \ > + IOMMU_IOAS_MAP_WRITEABLE | IOMMU_IOAS_MAP_READABLE)) > + > +#define test_ioctl_ioas_map_id_file(ioas_id, mfd, start, length, iova_p) \ > + ASSERT_EQ(0, \ > + _test_ioctl_ioas_map_file( \ > + self->fd, ioas_id, mfd, start, length, iova_p, \ > + IOMMU_IOAS_MAP_WRITEABLE | IOMMU_IOAS_MAP_READABLE)) > + > static int _test_ioctl_set_temp_memory_limit(int fd, unsigned int limit) > { > struct iommu_test_cmd memlimit_cmd = {

8 months, 1 week

2
1
0 0

[PATCH v4 00/14] iommufd: Add vIOMMU infrastructure (Part-2: vDEVICE)

by Nicolin Chen

Following the previous vIOMMU series, this adds another vDEVICE structure, representing the association from an iommufd_device to an iommufd_viommu. This gives the whole architecture a new "v" layer: _______________________________________________________________________ | iommufd (with vIOMMU/vDEVICE) | | _____________ _____________ | | | | | | | | |----------------| vIOMMU |<---| vDEVICE |<------| | | | | | |_____________| | | | | ______ | | _____________ ___|____ | | | | | | | | | | | | | | | IOAS |<---|(HWPT_PAGING)|<---| HWPT_NESTED |<--| DEVICE | | | | |______| |_____________| |_____________| |________| | |______|________|______________|__________________|_______________|_____| | | | | | ______v_____ | ______v_____ ______v_____ ___v__ | struct | | PFN | (paging) | | (nested) | |struct| |iommu_device| |------>|iommu_domain|<----|iommu_domain|<----|device| |____________| storage|____________| |____________| |______| This vDEVICE object is used to collect and store all vIOMMU-related device information/attributes in a VM. As an initial series for vDEVICE, add only the virt_id to the vDEVICE, which is a vIOMMU specific device ID in a VM: e.g. vSID of ARM SMMUv3, vDeviceID of AMD IOMMU, and vID of Intel VT-d to a Context Table. This virt_id helps IOMMU drivers to link the vID to a pID of the device against the physical IOMMU instance. This is essential for a vIOMMU-based invalidation, where the request contains a device's vID for a device cache flush, e.g. ATC invalidation. Therefore, with this vDEVICE object, support a vIOMMU-based invalidation, by reusing IOMMUFD_CMD_HWPT_INVALIDATE for a vIOMMU object to flush cache with a given driver data. As for the implementation of the series, add driver support in ARM SMMUv3 for a real world use case. This series is on Github: https://github.com/nicolinc/iommufd/commits/iommufd_viommu_p2-v4 For testing, try this "with-rmr" branch: https://github.com/nicolinc/iommufd/commits/iommufd_viommu_p2-v4-with-rmr Paring QEMU branch for testing: https://github.com/nicolinc/qemu/commits/wip/for_iommufd_viommu_p2-v4 Changelog v4 * Added missing brackets in switch-case * Fixed the unreleased idev refcount issue * Reworked the iommufd_vdevice_alloc allocator * Dropped support for IOMMU_VIOMMU_TYPE_DEFAULT * Added missing TEST_LENGTH and fail_nth coverages * Added a verification to the driver-allocated vDEVICE object * Added an iommufd_vdevice_abort for a missing mutex protection * Added a u64 structure arm_vsmmu_invalidation_cmd for user command conversion v3 https://lore.kernel.org/all/cover.1728491532.git.nicolinc@nvidia.com/ * Added Jason's Reviewed-by * Split this invalidation part out of the part-1 series * Repurposed VDEV_ID ioctl to a wider vDEVICE structure and ioctl * Reduced viommu_api functions by allowing drivers to access viommu and vdevice structure directly * Dropped vdevs_rwsem by using xa_lock instead * Dropped arm_smmu_cache_invalidate_user v2 https://lore.kernel.org/all/cover.1724776335.git.nicolinc@nvidia.com/ * Limited vdev_id to one per idev * Added a rw_sem to protect the vdev_id list * Reworked driver-level APIs with proper lockings * Added a new viommu_api file for IOMMUFD_DRIVER config * Dropped useless iommu_dev point from the viommu structure * Added missing index numnbers to new types in the uAPI header * Dropped IOMMU_VIOMMU_INVALIDATE uAPI; Instead, reuse the HWPT one * Reworked mock_viommu_cache_invalidate() using the new iommu helper * Reordered details of set/unset_vdev_id handlers for proper lockings v1 https://lore.kernel.org/all/cover.1723061377.git.nicolinc@nvidia.com/ Thanks! Nicolin Jason Gunthorpe (2): iommu: Add iommu_copy_struct_from_full_user_array helper iommu/arm-smmu-v3: Allow ATS for IOMMU_DOMAIN_NESTED Nicolin Chen (12): iommufd/viommu: Introduce IOMMUFD_OBJ_VDEVICE and its related struct iommufd/viommu: Add IOMMU_VDEVICE_ALLOC ioctl iommufd/selftest: Add IOMMU_VDEVICE_ALLOC test coverage iommu/viommu: Add cache_invalidate to iommufd_viommu_ops iommufd/hw_pagetable: Enforce cache invalidation op on vIOMMU-based hwpt_nested iommufd: Allow hwpt_id to carry viommu_id for IOMMU_HWPT_INVALIDATE iommufd/viommu: Add vdev_to_dev helper iommufd/selftest: Add mock_viommu_cache_invalidate iommufd/selftest: Add IOMMU_TEST_OP_DEV_CHECK_CACHE test command iommufd/selftest: Add vIOMMU coverage for IOMMU_HWPT_INVALIDATE ioctl Documentation: userspace-api: iommufd: Update vDEVICE iommu/arm-smmu-v3: Add arm_vsmmu_cache_invalidate drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 9 +- drivers/iommu/iommufd/iommufd_private.h | 12 ++ drivers/iommu/iommufd/iommufd_test.h | 30 +++ include/linux/iommu.h | 49 ++++- include/linux/iommufd.h | 50 +++++ include/uapi/linux/iommufd.h | 61 +++++- tools/testing/selftests/iommu/iommufd_utils.h | 83 +++++++ .../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 162 +++++++++++++- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 32 ++- drivers/iommu/iommufd/device.c | 11 + drivers/iommu/iommufd/driver.c | 7 + drivers/iommu/iommufd/hw_pagetable.c | 36 +++- drivers/iommu/iommufd/main.c | 7 + drivers/iommu/iommufd/selftest.c | 115 +++++++++- drivers/iommu/iommufd/viommu.c | 108 ++++++++++ tools/testing/selftests/iommu/iommufd.c | 204 +++++++++++++++++- .../selftests/iommu/iommufd_fail_nth.c | 4 + Documentation/userspace-api/iommufd.rst | 41 +++- 18 files changed, 983 insertions(+), 38 deletions(-) -- 2.43.0

8 months, 1 week

4
28
0 0

kselftest/next build: 5 builds: 2 failed, 3 passed, 1 warning (v6.12-rc3-6-g2a027d6bb6600)

by kernelci.org bot

kselftest/next build: 5 builds: 2 failed, 3 passed, 1 warning (v6.12-rc3-6-g2a027d6bb6600) Full Build Summary: https://kernelci.org/build/kselftest/branch/next/kernel/v6.12-rc3-6-g2a027d… Tree: kselftest Branch: next Git Describe: v6.12-rc3-6-g2a027d6bb6600 Git Commit: 2a027d6bb66002c8e50e974676f932b33c5fce10 Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 3 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest (arm64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x23: relocation to !ENDBR: .text+0x14fd19 --- For more info write to <info(a)kernelci.org>

8 months, 1 week

1
0
0 0

[PATCH v4 0/4] introduce PIDFD_SELF* sentinels

by Lorenzo Stoakes

If you wish to utilise a pidfd interface to refer to the current process or thread it is rather cumbersome, requiring something like: int pidfd = pidfd_open(getpid(), 0 or PIDFD_THREAD); ... close(pidfd); Or the equivalent call opening /proc/self. It is more convenient to use a sentinel value to indicate to an interface that accepts a pidfd that we simply wish to refer to the current process thread. This series introduces sentinels for this purposes which can be passed as the pidfd in this instance rather than having to establish a dummy fd for this purpose. It is useful to refer to both the current thread from the userland's perspective for which we use PIDFD_SELF, and the current process from the userland's perspective, for which we use PIDFD_SELF_PROCESS. There is unfortunately some confusion between the kernel and userland as to what constitutes a process - a thread from the userland perspective is a process in userland, and a userland process is a thread group (more specifically the thread group leader from the kernel perspective). We therefore alias things thusly: * PIDFD_SELF_THREAD aliased by PIDFD_SELF - use PIDTYPE_PID. * PIDFD_SELF_THREAD_GROUP alised by PIDFD_SELF_PROCESS - use PIDTYPE_TGID. In all of the kernel code we refer to PIDFD_SELF_THREAD and PIDFD_SELF_THREAD_GROUP. However we expect users to use PIDFD_SELF and PIDFD_SELF_PROCESS. This matters for cases where, for instance, a user unshare()'s FDs or does thread-specific signal handling and where the user would be hugely confused if the FDs referenced or signal processed referred to the thread group leader rather than the individual thread. We ensure that pidfd_send_signal() and pidfd_getfd() work correctly, and assert as much in selftests. All other interfaces except setns() will work implicitly with this new interface, however it doesn't make sense to test waitid(P_PIDFD, ...) as waiting on ourselves is a blocking operation. In the case of setns() we explicitly disallow use of PIDFD_SELF* as it doesn't make sense to obtain the namespaces of our own process, and it would require work to implement this functionality there that would be of no use. We also do not provide the ability to utilise PIDFD_SELF* in ordinary fd operations such as open() or poll(), as this would require extensive work and be of no real use. v4: * Avoid returning an fd in the __pidfd_get_pid() function as pointed out by Christian, instead simply always pin the pid and maintain fd scope in the helper alone. * Add wrapper header file in tools/include/linux to allow for import of UAPI pidfd.h header without encountering the collision between system fcntl.h and linux/fcntl.h as discussed with Shuah and John. * Fixup tests to import the UAPI pidfd.h header working around conflicts between system fcntl.h and linux/fcntl.h which the UAPI pidfd.h imports, as reported by Shuah. * Use an int for pidfd_is_self_sentinel() to avoid any dependency on stdbool.h in userland. v3: * Do not fput() an invalid fd as reported by kernel test bot. * Fix unintended churn from moving variable declaration. https://lore.kernel.org/linux-mm/cover.1729073310.git.lorenzo.stoakes@oracl… v2: * Fix tests as reported by Shuah. * Correct RFC version lore link. https://lore.kernel.org/linux-mm/cover.1728643714.git.lorenzo.stoakes@oracl… Non-RFC v1: * Removed RFC tag - there seems to be general consensus that this change is a good idea, but perhaps some debate to be had on implementation. It seems sensible then to move forward with the RFC flag removed. * Introduced PIDFD_SELF_THREAD, PIDFD_SELF_THREAD_GROUP and their aliases PIDFD_SELF and PIDFD_SELF_PROCESS respectively. * Updated testing accordingly. https://lore.kernel.org/linux-mm/cover.1728578231.git.lorenzo.stoakes@oracl… RFC version: https://lore.kernel.org/linux-mm/cover.1727644404.git.lorenzo.stoakes@oracl… Lorenzo Stoakes (4): pidfd: extend pidfd_get_pid() and de-duplicate pid lookup pidfd: add PIDFD_SELF_* sentinels to refer to own thread/process selftests: pidfd: add pidfd.h UAPI wrapper selftests: pidfd: add tests for PIDFD_SELF_* include/linux/pid.h | 34 ++++- include/uapi/linux/pidfd.h | 15 ++ kernel/exit.c | 3 +- kernel/nsproxy.c | 1 + kernel/pid.c | 65 +++++--- kernel/signal.c | 29 +--- tools/include/linux/pidfd.h | 14 ++ tools/testing/selftests/pidfd/Makefile | 3 +- tools/testing/selftests/pidfd/pidfd.h | 2 + .../selftests/pidfd/pidfd_getfd_test.c | 141 ++++++++++++++++++ .../selftests/pidfd/pidfd_setns_test.c | 11 ++ tools/testing/selftests/pidfd/pidfd_test.c | 76 ++++++++-- 12 files changed, 333 insertions(+), 61 deletions(-) create mode 100644 tools/include/linux/pidfd.h -- 2.46.2

8 months, 1 week

5
17
0 0

[PATCH] selftests: Add kselftest framework to the testfile

by Shivam Chaudhary

This patch updates the existing test that checks for `open(O_TMPFILE)` and `linkat()` behaviors in mount namespaces to use the kselftest framework. This includes the following changes: - Replaced direct error handling with `ksft_test_result_*` macros for better reporting of test outcomes. - Added `ksft_print_header()` and `ksft_set_plan()` to structure test outputs more effectively. - Introduced the helper function `is_unshare()` to handle unshare-related checks. - Improved the test flow by adding more detailed pass/fail reporting for unshare, mounting, file opening, and linking operations. - Skips the test if it's not run as root, providing an appropriate Warning. Test logs: Before change: - Withou root error: unshare, errno 1 - With root No, output After change: - Without root TAP version 13 1..1 ok 1 # SKIP This test needs root to ru - With root TAP version 13 1..1 ok 1 unshare(): we have a new mount namespace. 1..2 ok 2 mount(): Root filesystem private mount: Success 1..3 ok 3 mount(): Mounting tmpfs on /tmp: Success 1..4 ok 4 openat(): Open first temporary file: Success 1..5 ok 5 linkat(): Linking the temporary file: Success 1..6 ok 6 openat(): Opening the second temporary file: Success # Totals: pass:6 fail:0 xfail:0 xpass:0 skip:0 error:0 Signed-off-by: Shivam Chaudhary <cvam0000(a)gmail.com> --- .../selftests/tmpfs/bug-link-o-tmpfile.c | 72 +++++++++++++++---- 1 file changed, 58 insertions(+), 14 deletions(-) diff --git a/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c b/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c index b5c3ddb90942..26dea19c1614 100644 --- a/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c +++ b/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c @@ -23,45 +23,89 @@ #include <sys/mount.h> #include <unistd.h> -int main(void) -{ - int fd; +#include "../kselftest.h" - if (unshare(CLONE_NEWNS) == -1) { +static int is_unshare(int flag) +{ + if (unshare(flag) == -1) { if (errno == ENOSYS || errno == EPERM) { - fprintf(stderr, "error: unshare, errno %d\n", errno); - return 4; + ksft_test_result_fail("error: unshare, errno %d\n", errno); + return -1; // Return -1 for failure } fprintf(stderr, "error: unshare, errno %d\n", errno); + return -1; + } + + return 0; // Return 0 for success +} + +int main(void) +{ + int fd; + + // Setting up kselftest framework + ksft_print_header(); + ksft_set_plan(1); + + // Check if test is run as root + if (geteuid()) { + ksft_test_result_skip("This test needs root to run!\n"); return 1; } - if (mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) == -1) { - fprintf(stderr, "error: mount '/', errno %d\n", errno); + + if (is_unshare(CLONE_NEWNS) == 0) { + ksft_test_result_pass("unshare(): we have a new mount namespace.\n"); + } else { + ksft_test_result_fail("unshare(): failed\n"); return 1; } + ksft_set_plan(2); + + if (mount(NULL, "/", NULL, MS_PRIVATE | MS_REC, NULL) == -1) { + ksft_test_result_fail("mount(): Root filesystem private mount: Fail %d\n", errno); + return 1; + } else { + ksft_test_result_pass("mount(): Root filesystem private mount: Success\n"); + } + + ksft_set_plan(3); /* Our heroes: 1 root inode, 1 O_TMPFILE inode, 1 permanent inode. */ if (mount(NULL, "/tmp", "tmpfs", 0, "nr_inodes=3") == -1) { - fprintf(stderr, "error: mount tmpfs, errno %d\n", errno); + ksft_test_result_fail("mount(): Mounting tmpfs on /tmp: Fail %d\n", errno); return 1; + } else { + ksft_test_result_pass("mount(): Mounting tmpfs on /tmp: Success\n"); } - fd = openat(AT_FDCWD, "/tmp", O_WRONLY|O_TMPFILE, 0600); + ksft_set_plan(4); + fd = openat(AT_FDCWD, "/tmp", O_WRONLY | O_TMPFILE, 0600); if (fd == -1) { - fprintf(stderr, "error: open 1, errno %d\n", errno); + ksft_test_result_fail("openat(): Open first temporary file: Fail %d\n", errno); return 1; + } else { + ksft_test_result_pass("openat(): Open first temporary file: Success\n"); } + + ksft_set_plan(5); if (linkat(fd, "", AT_FDCWD, "/tmp/1", AT_EMPTY_PATH) == -1) { - fprintf(stderr, "error: linkat, errno %d\n", errno); + ksft_test_result_fail("linkat(): Linking the temporary file: Fail %d\n", errno); + close(fd); // Ensure fd is closed on failure return 1; + } else { + ksft_test_result_pass("linkat(): Linking the temporary file: Success\n"); } close(fd); - fd = openat(AT_FDCWD, "/tmp", O_WRONLY|O_TMPFILE, 0600); + ksft_set_plan(6); + fd = openat(AT_FDCWD, "/tmp", O_WRONLY | O_TMPFILE, 0600); if (fd == -1) { - fprintf(stderr, "error: open 2, errno %d\n", errno); + ksft_test_result_fail("openat(): Opening the second temporary file: Fail %d\n", errno); return 1; + } else { + ksft_test_result_pass("openat(): Opening the second temporary file: Success\n"); } + ksft_exit_pass(); return 0; } -- 2.34.1

8 months, 1 week

2
2
0 0

[PATCH] lib/math: Add int_sqrt test suite

by Luis Felipe Hernandez

Adds test suite for integer based square root function. The test suite is designed to verify the correctness of the int_sqrt math library function. Signed-off-by: Luis Felipe Hernandez <luis.hernandez093(a)gmail.com> --- lib/Kconfig.debug | 17 ++++++++++++ lib/math/Makefile | 1 + lib/math/tests/Makefile | 1 + lib/math/tests/int_sqrt_kunit.c | 48 +++++++++++++++++++++++++++++++++ 4 files changed, 67 insertions(+) create mode 100644 lib/math/tests/int_sqrt_kunit.c diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 7312ae7c3cc5..a7e63dae9281 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2993,6 +2993,23 @@ config TEST_OBJPOOL If unsure, say N. +config INT_SQRT_KUNIT_TEST + tristate "Integer square root test test" if !KUNIT_ALL_TESTS + depends on KUNIT + default KUNIT_ALL_TESTS + help + This option enables the KUnit test suite for the int_sqrt function, + which performs square root calculation. The test suite is designed to + verify that the implementation of int_sqrt correctly computes the + square root of a number. + + Enabling this option will include tests that check various scenarios + and edge cases to ensure the accuracy and reliability of the square root + function. + + If unsure, say N + + endif # RUNTIME_TESTING_MENU config ARCH_USE_MEMTEST diff --git a/lib/math/Makefile b/lib/math/Makefile index 3ef11305f8d2..c7b043ffb249 100644 --- a/lib/math/Makefile +++ b/lib/math/Makefile @@ -9,3 +9,4 @@ obj-$(CONFIG_INT_POW_TEST) += tests/int_pow_kunit.o obj-$(CONFIG_TEST_DIV64) += test_div64.o obj-$(CONFIG_TEST_MULDIV64) += test_mul_u64_u64_div_u64.o obj-$(CONFIG_RATIONAL_KUNIT_TEST) += rational-test.o +obj-y += tests/ \ No newline at end of file diff --git a/lib/math/tests/Makefile b/lib/math/tests/Makefile index 6a169123320a..e1a79f093b2d 100644 --- a/lib/math/tests/Makefile +++ b/lib/math/tests/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_INT_POW_TEST) += int_pow_kunit.o +obj-$(CONFIG_INT_SQRT_KUNIT_TEST) += int_sqrt_kunit.o diff --git a/lib/math/tests/int_sqrt_kunit.c b/lib/math/tests/int_sqrt_kunit.c new file mode 100644 index 000000000000..9935f52e808f --- /dev/null +++ b/lib/math/tests/int_sqrt_kunit.c @@ -0,0 +1,48 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <kunit/test.h> +#include <linux/math.h> + +struct test_case_params { + unsigned long x; + unsigned long expected_result; + const char *name; +}; + +static const struct test_case_params params[] = { + { 0, 0, "edge-case: square root of 0" }, + { 4, 2, "perfect square: square root of 4" }, + { 81, 9, "perfect square: square root of 9" }, + { 2, 1, "non-perfect square: square root of 2" }, + { 5, 2, "non-perfect square: square root of 5"}, + { ULONG_MAX, 4294967295, "large input"}, +}; + +static void get_desc(const struct test_case_params *tc, char *desc) +{ + strscpy(desc, tc->name, KUNIT_PARAM_DESC_SIZE); +} + +KUNIT_ARRAY_PARAM(int_sqrt, params, get_desc); + +static void int_sqrt_test(struct kunit *test) +{ + const struct test_case_params *tc = (const struct test_case_params *)test->param_value; + + KUNIT_EXPECT_EQ(test, tc->expected_result, int_sqrt(tc->x)); +} + +static struct kunit_case math_int_sqrt_test_cases[] = { + KUNIT_CASE_PARAM(int_sqrt_test, int_sqrt_gen_params), + {} +}; + +static struct kunit_suite int_sqrt_test_suite = { + .name = "math-int_sqrt", + .test_cases = math_int_sqrt_test_cases, +}; + +kunit_test_suites(&int_sqrt_test_suite); + +MODULE_DESCRIPTION("math.int_sqrt KUnit test suite"); +MODULE_LICENSE("GPL"); -- 2.47.0

8 months, 1 week

2
1
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[PATCH v5 00/10] riscv: Userspace pointer masking and tagged address ABI

by Samuel Holland

RISC-V defines three extensions for pointer masking[1]: - Smmpm: configured in M-mode, affects M-mode - Smnpm: configured in M-mode, affects the next lower mode (S or U-mode) - Ssnpm: configured in S-mode, affects the next lower mode (VS, VU, or U-mode) This series adds support for configuring Smnpm or Ssnpm (depending on which privilege mode the kernel is running in) to allow pointer masking in userspace (VU or U-mode), extending the PR_SET_TAGGED_ADDR_CTRL API from arm64. Unlike arm64 TBI, userspace pointer masking is not enabled by default on RISC-V. Additionally, the tag width (referred to as PMLEN) is variable, so userspace needs to ask the kernel for a specific tag width, which is interpreted as a lower bound on the number of tag bits. This series also adds support for a tagged address ABI similar to arm64 and x86. Since accesses from the kernel to user memory use the kernel's pointer masking configuration, not the user's, the kernel must untag user pointers in software before dereferencing them. And since the tag width is variable, as with LAM on x86, it must be kept the same across all threads in a process so untagged_addr_remote() can work. [1]: https://github.com/riscv/riscv-j-extension/raw/d70011dde6c2/zjpm-spec.pdf --- This series depends on the per-thread envcfg series in riscv/for-next. This series can be tested in QEMU by applying a patch set[2]. KASAN_SW_TAGS using pointer masking is an independent patch series[3]. [2]: https://lore.kernel.org/qemu-devel/20240511101053.1875596-1-me@deliversmonk… [3]: https://lore.kernel.org/linux-riscv/20240814085618.968833-1-samuel.holland@… Changes in v5: - Update pointer masking spec version to 1.0 and state to ratified - Document how PR_[SG]ET_TAGGED_ADDR_CTRL are used on RISC-V - Document that the RISC-V tagged address ABI is the same as AArch64 - Rename "pm" selftests directory to "abi" to be more generic - Fix -Wparentheses warnings - Fix order of operations when writing via the tagged pointer - Update pointer masking spec version to 1.0 in hwprobe documentation Changes in v4: - Switch IS_ENABLED back to #ifdef to fix riscv32 build - Combine __untagged_addr() and __untagged_addr_remote() Changes in v3: - Note in the commit message that the ISA extension spec is frozen - Rebase on riscv/for-next (ISA extension list conflicts) - Remove RISCV_ISA_EXT_SxPM, which was not used anywhere - Use shifts instead of large numbers in ENVCFG_PMM* macro definitions - Rename CONFIG_RISCV_ISA_POINTER_MASKING to CONFIG_RISCV_ISA_SUPM, since it only controls the userspace part of pointer masking - Use IS_ENABLED instead of #ifdef when possible - Use an enum for the supported PMLEN values - Simplify the logic in set_tagged_addr_ctrl() - Use IS_ENABLED instead of #ifdef when possible - Implement mm_untag_mask() - Remove pmlen from struct thread_info (now only in mm_context_t) Changes in v2: - Drop patch 4 ("riscv: Define is_compat_thread()"), as an equivalent patch was already applied - Move patch 5 ("riscv: Split per-CPU and per-thread envcfg bits") to a different series[3] - Update pointer masking specification version reference - Provide macros for the extension affecting the kernel and userspace - Use the correct name for the hstatus.HUPMM field - Rebase on riscv/linux.git for-next - Add and use the envcfg_update_bits() helper function - Inline flush_tagged_addr_state() - Implement untagged_addr_remote() - Restrict PMLEN changes once a process is multithreaded - Rename "tags" directory to "pm" to avoid .gitignore rules - Add .gitignore file to ignore the compiled selftest binary - Write to a pipe to force dereferencing the user pointer - Handle SIGSEGV in the child process to reduce dmesg noise - Export Supm via hwprobe - Export Smnpm and Ssnpm to KVM guests Samuel Holland (10): dt-bindings: riscv: Add pointer masking ISA extensions riscv: Add ISA extension parsing for pointer masking riscv: Add CSR definitions for pointer masking riscv: Add support for userspace pointer masking riscv: Add support for the tagged address ABI riscv: Allow ptrace control of the tagged address ABI riscv: selftests: Add a pointer masking test riscv: hwprobe: Export the Supm ISA extension RISC-V: KVM: Allow Smnpm and Ssnpm extensions for guests KVM: riscv: selftests: Add Smnpm and Ssnpm to get-reg-list test Documentation/arch/riscv/hwprobe.rst | 3 + Documentation/arch/riscv/uabi.rst | 16 + .../devicetree/bindings/riscv/extensions.yaml | 18 + arch/riscv/Kconfig | 11 + arch/riscv/include/asm/csr.h | 16 + arch/riscv/include/asm/hwcap.h | 5 + arch/riscv/include/asm/mmu.h | 7 + arch/riscv/include/asm/mmu_context.h | 13 + arch/riscv/include/asm/processor.h | 8 + arch/riscv/include/asm/switch_to.h | 11 + arch/riscv/include/asm/uaccess.h | 43 ++- arch/riscv/include/uapi/asm/hwprobe.h | 1 + arch/riscv/include/uapi/asm/kvm.h | 2 + arch/riscv/kernel/cpufeature.c | 3 + arch/riscv/kernel/process.c | 154 ++++++++ arch/riscv/kernel/ptrace.c | 42 +++ arch/riscv/kernel/sys_hwprobe.c | 3 + arch/riscv/kvm/vcpu_onereg.c | 4 + include/uapi/linux/elf.h | 1 + include/uapi/linux/prctl.h | 5 +- .../selftests/kvm/riscv/get-reg-list.c | 8 + tools/testing/selftests/riscv/Makefile | 2 +- tools/testing/selftests/riscv/abi/.gitignore | 1 + tools/testing/selftests/riscv/abi/Makefile | 10 + .../selftests/riscv/abi/pointer_masking.c | 332 ++++++++++++++++++ 25 files changed, 712 insertions(+), 7 deletions(-) create mode 100644 tools/testing/selftests/riscv/abi/.gitignore create mode 100644 tools/testing/selftests/riscv/abi/Makefile create mode 100644 tools/testing/selftests/riscv/abi/pointer_masking.c -- 2.45.1

8 months, 1 week

3
12
0 0

[PATCH RFC 0/3] Verify bias functionality for pinctrl_paris driver through new gpio test

by Nícolas F. R. A. Prado

This series was motivated by the regression fixed by 166bf8af9122 ("pinctrl: mediatek: common-v2: Fix broken bias-disable for PULL_PU_PD_RSEL_TYPE"). A bug was introduced in the pinctrl_paris driver which prevented certain pins from having their bias configured. Running this test on the mt8195-tomato platform with the test plan included below[1] shows the test passing with the fix applied, but failing without the fix: With fix: $ ./gpio-setget-config.py TAP version 13 # Using test plan file: ./google,tomato.yaml 1..3 ok 1 pinctrl_paris.34.pull-up ok 2 pinctrl_paris.34.pull-down ok 3 pinctrl_paris.34.disabled # Totals: pass:3 fail:0 xfail:0 xpass:0 skip:0 error:0 Without fix: $ ./gpio-setget-config.py TAP version 13 # Using test plan file: ./google,tomato.yaml 1..3 # Bias doesn't match: Expected pull-up, read pull-down. not ok 1 pinctrl_paris.34.pull-up ok 2 pinctrl_paris.34.pull-down # Bias doesn't match: Expected disabled, read pull-down. not ok 3 pinctrl_paris.34.disabled # Totals: pass:1 fail:2 xfail:0 xpass:0 skip:0 error:0 In order to achieve this, the first patch exposes bias configuration through the GPIO API in the pinctrl_paris driver, patch 2 extends the gpio-mockup-cdev utility for use by patch 3, and patch 3 introduces a new GPIO kselftest that takes a test plan in YAML, which can be tailored per-platform to specify the configurations to test, and sets and gets back each pin configuration to verify that they match and thus that the driver is behaving as expected. Since the GPIO uAPI only allows setting the pin configuration, getting it back is done through pinconf-pins in the pinctrl debugfs folder. The test currently only verifies bias but it would be easy to extend to verify other pin configurations. The test plan YAML file can be customized for each use-case and is platform-dependant. For that reason, only an example is included in patch 3 and the user is supposed to provide their test plan. That said, the aim is to collect test plans for ease of use at [2]. [1] This is the test plan used for mt8195-tomato: - label: "pinctrl_paris" tests: # Pin 34 has type MTK_PULL_PU_PD_RSEL_TYPE and is unused. # Setting bias to MTK_PULL_PU_PD_RSEL_TYPE pins was fixed by # 166bf8af9122 ("pinctrl: mediatek: common-v2: Fix broken bias-disable for PULL_PU_PD_RSEL_TYPE") - pin: 34 bias: "pull-up" - pin: 34 bias: "pull-down" - pin: 34 bias: "disabled" [2] https://github.com/kernelci/platform-test-parameters Signed-off-by: Nícolas F. R. A. Prado <nfraprado(a)collabora.com> --- Nícolas F. R. A. Prado (3): pinctrl: mediatek: paris: Expose more configurations to GPIO set_config selftest: gpio: Add wait flag to gpio-mockup-cdev selftest: gpio: Add a new set-get config test drivers/pinctrl/mediatek/pinctrl-paris.c | 20 +-- tools/testing/selftests/gpio/Makefile | 2 +- tools/testing/selftests/gpio/gpio-mockup-cdev.c | 14 +- .../gpio-set-get-config-example-test-plan.yaml | 15 ++ .../testing/selftests/gpio/gpio-set-get-config.py | 183 +++++++++++++++++++++ 5 files changed, 220 insertions(+), 14 deletions(-) --- base-commit: 6a7917c89f219f09b1d88d09f376000914a52763 change-id: 20240906-kselftest-gpio-set-get-config-6e5bb670c1a5 Best regards, -- Nícolas F. R. A. Prado <nfraprado(a)collabora.com>

8 months, 1 week

2
6
0 0

[PATCH net-next v2 8/8] selftests: net: fdb_notify: Add a test for FDB notifications

by Petr Machata

Check that only one notification is produced for various FDB edit operations. Regarding the ip_link_add() and ip_link_master() helpers. This pattern of action plus corresponding defer is bound to come up often, and a dedicated vocabulary to capture it will be handy. tunnel_create() and vlan_create() from forwarding/lib.sh are somewhat opaque and perhaps too kitchen-sinky, so I tried to go in the opposite direction with these ones, and wrapped only the bare minimum to schedule a corresponding cleanup. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Amit Cohen <amcohen(a)nvidia.com> Acked-by: Shuah Khan <skhan(a)linuxfoundation.org> --- Notes: CC: Shuah Khan <shuah(a)kernel.org> CC: Benjamin Poirier <bpoirier(a)nvidia.com> CC: Hangbin Liu <liuhangbin(a)gmail.com> CC: linux-kselftest(a)vger.kernel.org CC: Jiri Pirko <jiri(a)resnulli.us> --- tools/testing/selftests/net/Makefile | 2 +- tools/testing/selftests/net/fdb_notify.sh | 95 +++++++++++++++++++++++ tools/testing/selftests/net/lib.sh | 17 ++++ 3 files changed, 113 insertions(+), 1 deletion(-) create mode 100755 tools/testing/selftests/net/fdb_notify.sh diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index 26a4883a65c9..ab0e8f30bfe7 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -92,7 +92,7 @@ TEST_PROGS += test_vxlan_mdb.sh TEST_PROGS += test_bridge_neigh_suppress.sh TEST_PROGS += test_vxlan_nolocalbypass.sh TEST_PROGS += test_bridge_backup_port.sh -TEST_PROGS += fdb_flush.sh +TEST_PROGS += fdb_flush.sh fdb_notify.sh TEST_PROGS += fq_band_pktlimit.sh TEST_PROGS += vlan_hw_filter.sh TEST_PROGS += bpf_offload.py diff --git a/tools/testing/selftests/net/fdb_notify.sh b/tools/testing/selftests/net/fdb_notify.sh new file mode 100755 index 000000000000..a98047361988 --- /dev/null +++ b/tools/testing/selftests/net/fdb_notify.sh @@ -0,0 +1,95 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +source lib.sh + +ALL_TESTS=" + test_dup_bridge + test_dup_vxlan_self + test_dup_vxlan_master + test_dup_macvlan_self + test_dup_macvlan_master +" + +do_test_dup() +{ + local op=$1; shift + local what=$1; shift + local tmpf + + RET=0 + + tmpf=$(mktemp) + defer rm "$tmpf" + + defer_scope_push + bridge monitor fdb &> "$tmpf" & + defer kill_process $! + + bridge fdb "$op" 00:11:22:33:44:55 vlan 1 "$@" + sleep 0.2 + defer_scope_pop + + local count=$(grep -c -e 00:11:22:33:44:55 $tmpf) + ((count == 1)) + check_err $? "Got $count notifications, expected 1" + + log_test "$what $op: Duplicate notifications" +} + +test_dup_bridge() +{ + ip_link_add br up type bridge vlan_filtering 1 + do_test_dup add "bridge" dev br self + do_test_dup del "bridge" dev br self +} + +test_dup_vxlan_self() +{ + ip_link_add br up type bridge vlan_filtering 1 + ip_link_add vx up type vxlan id 2000 dstport 4789 + ip_link_master vx br + + do_test_dup add "vxlan" dev vx self dst 192.0.2.1 + do_test_dup del "vxlan" dev vx self dst 192.0.2.1 +} + +test_dup_vxlan_master() +{ + ip_link_add br up type bridge vlan_filtering 1 + ip_link_add vx up type vxlan id 2000 dstport 4789 + ip_link_master vx br + + do_test_dup add "vxlan master" dev vx master + do_test_dup del "vxlan master" dev vx master +} + +test_dup_macvlan_self() +{ + ip_link_add dd up type dummy + ip_link_add mv up link dd type macvlan mode passthru + + do_test_dup add "macvlan self" dev mv self + do_test_dup del "macvlan self" dev mv self +} + +test_dup_macvlan_master() +{ + ip_link_add br up type bridge vlan_filtering 1 + ip_link_add dd up type dummy + ip_link_add mv up link dd type macvlan mode passthru + ip_link_master mv br + + do_test_dup add "macvlan master" dev mv self + do_test_dup del "macvlan master" dev mv self +} + +cleanup() +{ + defer_scopes_cleanup +} + +trap cleanup EXIT +tests_run + +exit $EXIT_STATUS diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index 24f63e45735d..8994fec1c38f 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -442,3 +442,20 @@ kill_process() # Suppress noise from killing the process. { kill $pid && wait $pid; } 2>/dev/null } + +ip_link_add() +{ + local name=$1; shift + + ip link add name "$name" "$@" + defer ip link del dev "$name" +} + +ip_link_master() +{ + local member=$1; shift + local master=$1; shift + + ip link set dev "$member" master "$master" + defer ip link set dev "$member" nomaster +} -- 2.45.0

8 months, 1 week

1
0
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[PATCH net-next v2 7/8] selftests: net: lib: Add kill_process

by Petr Machata

A number of selftests run processes in the background and need to kill them afterwards. Instead for everyone to open-code the kill / wait / redirect mantra, add a helper in net/lib.sh. Convert existing open-code sites. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Acked-by: Shuah Khan <skhan(a)linuxfoundation.org> --- Notes: CC: Shuah Khan <shuah(a)kernel.org> CC: Benjamin Poirier <bpoirier(a)nvidia.com> CC: Hangbin Liu <liuhangbin(a)gmail.com> CC: linux-kselftest(a)vger.kernel.org CC: Jiri Pirko <jiri(a)resnulli.us> CC: Andrew Lunn <andrew+netdev(a)lunn.ch> --- .../selftests/drivers/net/mlxsw/devlink_trap.sh | 2 +- .../drivers/net/mlxsw/devlink_trap_l3_drops.sh | 4 ++-- .../drivers/net/mlxsw/devlink_trap_l3_exceptions.sh | 12 ++++++------ .../drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh | 4 ++-- .../drivers/net/mlxsw/devlink_trap_tunnel_ipip6.sh | 4 ++-- .../drivers/net/mlxsw/devlink_trap_tunnel_vxlan.sh | 4 ++-- .../net/mlxsw/devlink_trap_tunnel_vxlan_ipv6.sh | 4 ++-- .../testing/selftests/drivers/net/mlxsw/tc_sample.sh | 4 ++-- .../drivers/net/netdevsim/fib_notifications.sh | 6 +++--- tools/testing/selftests/net/drop_monitor_tests.sh | 2 +- tools/testing/selftests/net/fib_tests.sh | 8 ++++---- .../testing/selftests/net/forwarding/devlink_lib.sh | 2 +- tools/testing/selftests/net/forwarding/lib.sh | 3 +-- tools/testing/selftests/net/forwarding/tc_police.sh | 8 ++++---- tools/testing/selftests/net/lib.sh | 8 ++++++++ 15 files changed, 41 insertions(+), 34 deletions(-) diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap.sh index 89b55e946eed..36055279ba92 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap.sh @@ -116,7 +116,7 @@ dev_del_test() log_test "Device delete" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid } trap cleanup EXIT diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_drops.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_drops.sh index 160891dcb4bc..db5806d189bb 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_drops.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_drops.sh @@ -595,7 +595,7 @@ irif_disabled_test() log_test "Ingress RIF disabled" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid ip link set dev $rp1 nomaster __addr_add_del $rp1 add 192.0.2.2/24 2001:db8:1::2/64 ip link del dev br0 type bridge @@ -645,7 +645,7 @@ erif_disabled_test() log_test "Egress RIF disabled" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid __addr_add_del $rp1 add 192.0.2.2/24 2001:db8:1::2/64 ip link del dev br0 type bridge devlink_trap_action_set $trap_name "drop" diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh index 190c1b6b5365..5d6d88b600f0 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh @@ -202,7 +202,7 @@ mtu_value_is_too_small_test() mtu_restore $rp2 - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $h1 ingress protocol ip pref 1 handle 101 flower } @@ -235,7 +235,7 @@ __ttl_value_is_too_small_test() log_test "TTL value is too small: TTL=$ttl_val" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $h1 ingress protocol ip pref 1 handle 101 flower } @@ -299,7 +299,7 @@ __mc_reverse_path_forwarding_test() log_test "Multicast reverse path forwarding: $desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $rp2 egress protocol $proto pref 1 handle 101 flower } @@ -347,7 +347,7 @@ __reject_route_test() log_test "Reject route: $desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid ip route del unreachable $unreachable tc filter del dev $h1 ingress protocol $proto pref 1 handle 101 flower } @@ -542,7 +542,7 @@ ipv4_lpm_miss_test() log_test "LPM miss: IPv4" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid vrf_without_routes_destroy } @@ -569,7 +569,7 @@ ipv6_lpm_miss_test() log_test "LPM miss: IPv6" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid vrf_without_routes_destroy } diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh index e9a82cae8c9a..4ac1dae92d0f 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh @@ -176,7 +176,7 @@ ecn_decap_test() log_test "$desc: Inner ECN is not ECT and outer is $ecn_desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower } @@ -207,7 +207,7 @@ no_matching_tunnel_test() log_test "$desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower } diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip6.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip6.sh index 878125041fc3..fce885184404 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip6.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip6.sh @@ -176,7 +176,7 @@ ecn_decap_test() log_test "$desc: Inner ECN is not ECT and outer is $ecn_desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ipv6 pref 1 handle 101 flower } @@ -207,7 +207,7 @@ no_matching_tunnel_test() log_test "$desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ipv6 pref 1 handle 101 flower } diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan.sh index 5f6eb965cfd1..7aca8e5922cf 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan.sh @@ -183,7 +183,7 @@ ecn_decap_test() log_test "$desc: Inner ECN is not ECT and outer is $ecn_desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower } @@ -253,7 +253,7 @@ corrupted_packet_test() log_test "$desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower } diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan_ipv6.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan_ipv6.sh index f6c16cbb6cf7..4599c331240b 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan_ipv6.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan_ipv6.sh @@ -188,7 +188,7 @@ ecn_decap_test() log_test "$desc: Inner ECN is not ECT and outer is $ecn_desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ipv6 pref 1 handle 101 flower } @@ -262,7 +262,7 @@ corrupted_packet_test() log_test "$desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ipv6 pref 1 handle 101 flower } diff --git a/tools/testing/selftests/drivers/net/mlxsw/tc_sample.sh b/tools/testing/selftests/drivers/net/mlxsw/tc_sample.sh index 83a0210e7544..bc7ea2df49fb 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/tc_sample.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/tc_sample.sh @@ -218,7 +218,7 @@ psample_capture_start() psample_capture_stop() { - { kill %% && wait %%; } 2>/dev/null + kill_process %% } __tc_sample_rate_test() @@ -499,7 +499,7 @@ tc_sample_md_out_tc_occ_test() backlog=$(tc -j -p -s qdisc show dev $rp2 | jq '.[0]["backlog"]') # Kill mausezahn. - { kill %% && wait %%; } 2>/dev/null + kill_process %% psample_capture_stop diff --git a/tools/testing/selftests/drivers/net/netdevsim/fib_notifications.sh b/tools/testing/selftests/drivers/net/netdevsim/fib_notifications.sh index 8d91191a098c..9896580c3d85 100755 --- a/tools/testing/selftests/drivers/net/netdevsim/fib_notifications.sh +++ b/tools/testing/selftests/drivers/net/netdevsim/fib_notifications.sh @@ -94,7 +94,7 @@ route_addition_check() sleep 1 $IP route add $route dev dummy1 sleep 1 - kill %% && wait %% &> /dev/null + kill_process %% route_notify_check $outfile $expected_num_notifications $offload_failed rm -f $outfile @@ -148,7 +148,7 @@ route_deletion_check() sleep 1 $IP route del $route dev dummy1 sleep 1 - kill %% && wait %% &> /dev/null + kill_process %% route_notify_check $outfile $expected_num_notifications rm -f $outfile @@ -191,7 +191,7 @@ route_replacement_check() sleep 1 $IP route replace $route dev dummy2 sleep 1 - kill %% && wait %% &> /dev/null + kill_process %% route_notify_check $outfile $expected_num_notifications rm -f $outfile diff --git a/tools/testing/selftests/net/drop_monitor_tests.sh b/tools/testing/selftests/net/drop_monitor_tests.sh index 7c4818c971fc..507d0a82f5f0 100755 --- a/tools/testing/selftests/net/drop_monitor_tests.sh +++ b/tools/testing/selftests/net/drop_monitor_tests.sh @@ -77,7 +77,7 @@ sw_drops_test() rm ${dir}/packets.pcap - { kill %% && wait %%; } 2>/dev/null + kill_process %% timeout 5 dwdump -o sw -w ${dir}/packets.pcap (( $(tshark -r ${dir}/packets.pcap \ -Y 'ip.dst == 192.0.2.10' 2> /dev/null | wc -l) == 0)) diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh index 5f3c28fc8624..3ea6f886a210 100755 --- a/tools/testing/selftests/net/fib_tests.sh +++ b/tools/testing/selftests/net/fib_tests.sh @@ -689,7 +689,7 @@ fib6_notify_test() log_test $ret 0 "ipv6 route add notify" - { kill %% && wait %%; } 2>/dev/null + kill_process %% #rm errors.txt @@ -736,7 +736,7 @@ fib_notify_test() log_test $ret 0 "ipv4 route add notify" - { kill %% && wait %%; } 2>/dev/null + kill_process %% rm errors.txt @@ -2328,7 +2328,7 @@ ipv4_mangle_test() $IP route del table 123 172.16.101.0/24 dev veth1 $IP rule del pref 100 - { kill %% && wait %%; } 2>/dev/null + kill_process %% rm $tmp_file route_cleanup @@ -2386,7 +2386,7 @@ ipv6_mangle_test() $IP -6 route del table 123 2001:db8:101::/64 dev veth1 $IP -6 rule del pref 100 - { kill %% && wait %%; } 2>/dev/null + kill_process %% rm $tmp_file route_cleanup diff --git a/tools/testing/selftests/net/forwarding/devlink_lib.sh b/tools/testing/selftests/net/forwarding/devlink_lib.sh index 62a05bca1e82..18afa89ebbcc 100644 --- a/tools/testing/selftests/net/forwarding/devlink_lib.sh +++ b/tools/testing/selftests/net/forwarding/devlink_lib.sh @@ -501,7 +501,7 @@ devlink_trap_drop_cleanup() local pref=$1; shift local handle=$1; shift - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $dev egress protocol $proto pref $pref handle $handle flower } diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index 8625e3c99f55..7337f398f9cc 100644 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -1574,8 +1574,7 @@ stop_traffic() { local pid=${1-%%}; shift - # Suppress noise from killing mausezahn. - { kill $pid && wait $pid; } 2>/dev/null + kill_process "$pid" } declare -A cappid diff --git a/tools/testing/selftests/net/forwarding/tc_police.sh b/tools/testing/selftests/net/forwarding/tc_police.sh index 5103f64a71d6..509fdedfcfa1 100755 --- a/tools/testing/selftests/net/forwarding/tc_police.sh +++ b/tools/testing/selftests/net/forwarding/tc_police.sh @@ -148,7 +148,7 @@ police_common_test() log_test "$test_name" - { kill %% && wait %%; } 2>/dev/null + kill_process %% tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower } @@ -198,7 +198,7 @@ police_shared_common_test() log_test "$test_name" - { kill %% && wait %%; } 2>/dev/null + kill_process %% } police_shared_test() @@ -278,7 +278,7 @@ police_mirror_common_test() log_test "$test_name" - { kill %% && wait %%; } 2>/dev/null + kill_process %% tc filter del dev $pol_if $dir protocol ip pref 1 handle 101 flower tc filter del dev $h3 ingress protocol ip pref 1 handle 101 flower tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower @@ -320,7 +320,7 @@ police_pps_common_test() log_test "$test_name" - { kill %% && wait %%; } 2>/dev/null + kill_process %% tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower } diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index 6bcf5d13879d..24f63e45735d 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -434,3 +434,11 @@ xfail_on_veth() "$@" fi } + +kill_process() +{ + local pid=$1; shift + + # Suppress noise from killing the process. + { kill $pid && wait $pid; } 2>/dev/null +} -- 2.45.0

8 months, 1 week

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[PATCH net-next v2 6/8] selftests: net: lib: Move checks from forwarding/lib.sh here

by Petr Machata

For logging to be useful, something has to set RET and retmsg by calling ret_set_ksft_status(). There is a suite of functions to that end in forwarding/lib: check_err, check_fail et.al. Move them to net/lib.sh so that every net test can use them. Existing lib.sh users might be using these same names for their functions. However lib.sh is always sourced near the top of the file (checked), and whatever new definitions will simply override the ones provided by lib.sh. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Amit Cohen <amcohen(a)nvidia.com> Acked-by: Shuah Khan <skhan(a)linuxfoundation.org> --- Notes: CC: Shuah Khan <shuah(a)kernel.org> CC: Benjamin Poirier <bpoirier(a)nvidia.com> CC: Hangbin Liu <liuhangbin(a)gmail.com> CC: linux-kselftest(a)vger.kernel.org CC: Jiri Pirko <jiri(a)resnulli.us> --- tools/testing/selftests/net/forwarding/lib.sh | 73 ------------------- tools/testing/selftests/net/lib.sh | 73 +++++++++++++++++++ 2 files changed, 73 insertions(+), 73 deletions(-) diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index d28dbf27c1f0..8625e3c99f55 100644 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -445,79 +445,6 @@ done ############################################################################## # Helpers -# Whether FAILs should be interpreted as XFAILs. Internal. -FAIL_TO_XFAIL= - -check_err() -{ - local err=$1 - local msg=$2 - - if ((err)); then - if [[ $FAIL_TO_XFAIL = yes ]]; then - ret_set_ksft_status $ksft_xfail "$msg" - else - ret_set_ksft_status $ksft_fail "$msg" - fi - fi -} - -check_fail() -{ - local err=$1 - local msg=$2 - - check_err $((!err)) "$msg" -} - -check_err_fail() -{ - local should_fail=$1; shift - local err=$1; shift - local what=$1; shift - - if ((should_fail)); then - check_fail $err "$what succeeded, but should have failed" - else - check_err $err "$what failed" - fi -} - -xfail() -{ - FAIL_TO_XFAIL=yes "$@" -} - -xfail_on_slow() -{ - if [[ $KSFT_MACHINE_SLOW = yes ]]; then - FAIL_TO_XFAIL=yes "$@" - else - "$@" - fi -} - -omit_on_slow() -{ - if [[ $KSFT_MACHINE_SLOW != yes ]]; then - "$@" - fi -} - -xfail_on_veth() -{ - local dev=$1; shift - local kind - - kind=$(ip -j -d link show dev $dev | - jq -r '.[].linkinfo.info_kind') - if [[ $kind = veth ]]; then - FAIL_TO_XFAIL=yes "$@" - else - "$@" - fi -} - not() { "$@" diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index 4f52b8e48a3a..6bcf5d13879d 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -361,3 +361,76 @@ tests_run() $current_test done } + +# Whether FAILs should be interpreted as XFAILs. Internal. +FAIL_TO_XFAIL= + +check_err() +{ + local err=$1 + local msg=$2 + + if ((err)); then + if [[ $FAIL_TO_XFAIL = yes ]]; then + ret_set_ksft_status $ksft_xfail "$msg" + else + ret_set_ksft_status $ksft_fail "$msg" + fi + fi +} + +check_fail() +{ + local err=$1 + local msg=$2 + + check_err $((!err)) "$msg" +} + +check_err_fail() +{ + local should_fail=$1; shift + local err=$1; shift + local what=$1; shift + + if ((should_fail)); then + check_fail $err "$what succeeded, but should have failed" + else + check_err $err "$what failed" + fi +} + +xfail() +{ + FAIL_TO_XFAIL=yes "$@" +} + +xfail_on_slow() +{ + if [[ $KSFT_MACHINE_SLOW = yes ]]; then + FAIL_TO_XFAIL=yes "$@" + else + "$@" + fi +} + +omit_on_slow() +{ + if [[ $KSFT_MACHINE_SLOW != yes ]]; then + "$@" + fi +} + +xfail_on_veth() +{ + local dev=$1; shift + local kind + + kind=$(ip -j -d link show dev $dev | + jq -r '.[].linkinfo.info_kind') + if [[ $kind = veth ]]; then + FAIL_TO_XFAIL=yes "$@" + else + "$@" + fi +} -- 2.45.0

8 months, 1 week

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[PATCH net-next v2 5/8] selftests: net: lib: Move tests_run from forwarding/lib.sh here

by Petr Machata

It would be good to use the same mechanism for scheduling and dispatching general net tests as the many forwarding tests already use. To that end, move the logging helpers to net/lib.sh so that every net test can use them. Existing lib.sh users might be using the name themselves. However lib.sh is always sourced near the top of the file (checked), and whatever new definition will simply override the one provided by lib.sh. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Amit Cohen <amcohen(a)nvidia.com> Acked-by: Shuah Khan <skhan(a)linuxfoundation.org> --- Notes: CC: Shuah Khan <shuah(a)kernel.org> CC: Benjamin Poirier <bpoirier(a)nvidia.com> CC: Hangbin Liu <liuhangbin(a)gmail.com> CC: linux-kselftest(a)vger.kernel.org CC: Jiri Pirko <jiri(a)resnulli.us> --- tools/testing/selftests/net/forwarding/lib.sh | 10 ---------- tools/testing/selftests/net/lib.sh | 10 ++++++++++ 2 files changed, 10 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index 41dd14c42c48..d28dbf27c1f0 100644 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -1285,16 +1285,6 @@ matchall_sink_create() action drop } -tests_run() -{ - local current_test - - for current_test in ${TESTS:-$ALL_TESTS}; do - in_defer_scope \ - $current_test - done -} - cleanup() { pre_cleanup diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index 691318b1ec55..4f52b8e48a3a 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -351,3 +351,13 @@ log_info() echo "INFO: $msg" } + +tests_run() +{ + local current_test + + for current_test in ${TESTS:-$ALL_TESTS}; do + in_defer_scope \ + $current_test + done +} -- 2.45.0

8 months, 1 week

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[PATCH net-next v2 4/8] selftests: net: lib: Move logging from forwarding/lib.sh here

by Petr Machata

Many net selftests invent their own logging helpers. These really should be in a library sourced by these tests. Currently forwarding/lib.sh has a suite of perfectly fine logging helpers, but sourcing a forwarding/ library from a higher-level directory smells of layering violation. In this patch, move the logging helpers to net/lib.sh so that every net test can use them. Together with the logging helpers, it's also necessary to move pause_on_fail(), and EXIT_STATUS and RET. Existing lib.sh users might be using these same names for their functions or variables. However lib.sh is always sourced near the top of the file (checked), and whatever new definitions will simply override the ones provided by lib.sh. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Amit Cohen <amcohen(a)nvidia.com> Acked-by: Shuah Khan <skhan(a)linuxfoundation.org> --- Notes: CC: Shuah Khan <shuah(a)kernel.org> CC: Benjamin Poirier <bpoirier(a)nvidia.com> CC: Hangbin Liu <liuhangbin(a)gmail.com> CC: linux-kselftest(a)vger.kernel.org CC: Jiri Pirko <jiri(a)resnulli.us> --- tools/testing/selftests/net/forwarding/lib.sh | 113 ----------------- tools/testing/selftests/net/lib.sh | 115 ++++++++++++++++++ 2 files changed, 115 insertions(+), 113 deletions(-) diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index 89c25f72b10c..41dd14c42c48 100644 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -48,7 +48,6 @@ declare -A NETIFS=( : "${WAIT_TIME:=5}" # Whether to pause on, respectively, after a failure and before cleanup. -: "${PAUSE_ON_FAIL:=no}" : "${PAUSE_ON_CLEANUP:=no}" # Whether to create virtual interfaces, and what netdevice type they should be. @@ -446,22 +445,6 @@ done ############################################################################## # Helpers -# Exit status to return at the end. Set in case one of the tests fails. -EXIT_STATUS=0 -# Per-test return value. Clear at the beginning of each test. -RET=0 - -ret_set_ksft_status() -{ - local ksft_status=$1; shift - local msg=$1; shift - - RET=$(ksft_status_merge $RET $ksft_status) - if (( $? )); then - retmsg=$msg - fi -} - # Whether FAILs should be interpreted as XFAILs. Internal. FAIL_TO_XFAIL= @@ -535,102 +518,6 @@ xfail_on_veth() fi } -log_test_result() -{ - local test_name=$1; shift - local opt_str=$1; shift - local result=$1; shift - local retmsg=$1; shift - - printf "TEST: %-60s [%s]\n" "$test_name $opt_str" "$result" - if [[ $retmsg ]]; then - printf "\t%s\n" "$retmsg" - fi -} - -pause_on_fail() -{ - if [[ $PAUSE_ON_FAIL == yes ]]; then - echo "Hit enter to continue, 'q' to quit" - read a - [[ $a == q ]] && exit 1 - fi -} - -handle_test_result_pass() -{ - local test_name=$1; shift - local opt_str=$1; shift - - log_test_result "$test_name" "$opt_str" " OK " -} - -handle_test_result_fail() -{ - local test_name=$1; shift - local opt_str=$1; shift - - log_test_result "$test_name" "$opt_str" FAIL "$retmsg" - pause_on_fail -} - -handle_test_result_xfail() -{ - local test_name=$1; shift - local opt_str=$1; shift - - log_test_result "$test_name" "$opt_str" XFAIL "$retmsg" - pause_on_fail -} - -handle_test_result_skip() -{ - local test_name=$1; shift - local opt_str=$1; shift - - log_test_result "$test_name" "$opt_str" SKIP "$retmsg" -} - -log_test() -{ - local test_name=$1 - local opt_str=$2 - - if [[ $# -eq 2 ]]; then - opt_str="($opt_str)" - fi - - if ((RET == ksft_pass)); then - handle_test_result_pass "$test_name" "$opt_str" - elif ((RET == ksft_xfail)); then - handle_test_result_xfail "$test_name" "$opt_str" - elif ((RET == ksft_skip)); then - handle_test_result_skip "$test_name" "$opt_str" - else - handle_test_result_fail "$test_name" "$opt_str" - fi - - EXIT_STATUS=$(ksft_exit_status_merge $EXIT_STATUS $RET) - return $RET -} - -log_test_skip() -{ - RET=$ksft_skip retmsg= log_test "$@" -} - -log_test_xfail() -{ - RET=$ksft_xfail retmsg= log_test "$@" -} - -log_info() -{ - local msg=$1 - - echo "INFO: $msg" -} - not() { "$@" diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index c8991cc6bf28..691318b1ec55 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -9,6 +9,9 @@ source "$net_dir/lib/sh/defer.sh" : "${WAIT_TIMEOUT:=20}" +# Whether to pause on after a failure. +: "${PAUSE_ON_FAIL:=no}" + BUSYWAIT_TIMEOUT=$((WAIT_TIMEOUT * 1000)) # ms # Kselftest framework constants. @@ -20,6 +23,11 @@ ksft_skip=4 # namespace list created by setup_ns NS_LIST=() +# Exit status to return at the end. Set in case one of the tests fails. +EXIT_STATUS=0 +# Per-test return value. Clear at the beginning of each test. +RET=0 + ############################################################################## # Helpers @@ -236,3 +244,110 @@ tc_rule_handle_stats_get() | jq ".[] | select(.options.handle == $handle) | \ .options.actions[0].stats$selector" } + +ret_set_ksft_status() +{ + local ksft_status=$1; shift + local msg=$1; shift + + RET=$(ksft_status_merge $RET $ksft_status) + if (( $? )); then + retmsg=$msg + fi +} + +log_test_result() +{ + local test_name=$1; shift + local opt_str=$1; shift + local result=$1; shift + local retmsg=$1; shift + + printf "TEST: %-60s [%s]\n" "$test_name $opt_str" "$result" + if [[ $retmsg ]]; then + printf "\t%s\n" "$retmsg" + fi +} + +pause_on_fail() +{ + if [[ $PAUSE_ON_FAIL == yes ]]; then + echo "Hit enter to continue, 'q' to quit" + read a + [[ $a == q ]] && exit 1 + fi +} + +handle_test_result_pass() +{ + local test_name=$1; shift + local opt_str=$1; shift + + log_test_result "$test_name" "$opt_str" " OK " +} + +handle_test_result_fail() +{ + local test_name=$1; shift + local opt_str=$1; shift + + log_test_result "$test_name" "$opt_str" FAIL "$retmsg" + pause_on_fail +} + +handle_test_result_xfail() +{ + local test_name=$1; shift + local opt_str=$1; shift + + log_test_result "$test_name" "$opt_str" XFAIL "$retmsg" + pause_on_fail +} + +handle_test_result_skip() +{ + local test_name=$1; shift + local opt_str=$1; shift + + log_test_result "$test_name" "$opt_str" SKIP "$retmsg" +} + +log_test() +{ + local test_name=$1 + local opt_str=$2 + + if [[ $# -eq 2 ]]; then + opt_str="($opt_str)" + fi + + if ((RET == ksft_pass)); then + handle_test_result_pass "$test_name" "$opt_str" + elif ((RET == ksft_xfail)); then + handle_test_result_xfail "$test_name" "$opt_str" + elif ((RET == ksft_skip)); then + handle_test_result_skip "$test_name" "$opt_str" + else + handle_test_result_fail "$test_name" "$opt_str" + fi + + EXIT_STATUS=$(ksft_exit_status_merge $EXIT_STATUS $RET) + return $RET +} + +log_test_skip() +{ + RET=$ksft_skip retmsg= log_test "$@" +} + +log_test_xfail() +{ + RET=$ksft_xfail retmsg= log_test "$@" +} + +log_info() +{ + local msg=$1 + + echo "INFO: $msg" +} -- 2.45.0

8 months, 1 week

1
0
0 0

[PATCH] sched_ext: Fix function pointer type mismatches in BPF selftests

by Vishal Chourasia

Fix incompatible function pointer type warnings in sched_ext BPF selftests by explicitly casting the function pointers when initializing struct_ops. This addresses multiple -Wincompatible-function-pointer-types warnings from the clang compiler where function signatures didn't match exactly. The void * cast ensures the compiler accepts the function pointer assignment despite minor type differences in the parameters. Signed-off-by: Vishal Chourasia <vishalc(a)linux.ibm.com> --- .../selftests/sched_ext/create_dsq.bpf.c | 6 +- .../sched_ext/ddsp_bogus_dsq_fail.bpf.c | 4 +- .../sched_ext/ddsp_vtimelocal_fail.bpf.c | 4 +- .../selftests/sched_ext/dsp_local_on.bpf.c | 8 +-- .../sched_ext/enq_select_cpu_fails.bpf.c | 4 +- tools/testing/selftests/sched_ext/exit.bpf.c | 14 ++--- .../testing/selftests/sched_ext/hotplug.bpf.c | 8 +-- .../sched_ext/init_enable_count.bpf.c | 8 +-- .../testing/selftests/sched_ext/maximal.bpf.c | 58 +++++++++---------- .../selftests/sched_ext/maybe_null.bpf.c | 6 +- .../sched_ext/maybe_null_fail_dsp.bpf.c | 4 +- .../sched_ext/maybe_null_fail_yld.bpf.c | 4 +- .../selftests/sched_ext/prog_run.bpf.c | 2 +- .../selftests/sched_ext/select_cpu_dfl.bpf.c | 2 +- .../sched_ext/select_cpu_dfl_nodispatch.bpf.c | 6 +- .../sched_ext/select_cpu_dispatch.bpf.c | 2 +- .../select_cpu_dispatch_bad_dsq.bpf.c | 4 +- .../select_cpu_dispatch_dbl_dsp.bpf.c | 4 +- .../sched_ext/select_cpu_vtime.bpf.c | 12 ++-- 19 files changed, 80 insertions(+), 80 deletions(-) diff --git a/tools/testing/selftests/sched_ext/create_dsq.bpf.c b/tools/testing/selftests/sched_ext/create_dsq.bpf.c index 23f79ed343f02..2cfc4ffd60e28 100644 --- a/tools/testing/selftests/sched_ext/create_dsq.bpf.c +++ b/tools/testing/selftests/sched_ext/create_dsq.bpf.c @@ -51,8 +51,8 @@ s32 BPF_STRUCT_OPS_SLEEPABLE(create_dsq_init) SEC(".struct_ops.link") struct sched_ext_ops create_dsq_ops = { - .init_task = create_dsq_init_task, - .exit_task = create_dsq_exit_task, - .init = create_dsq_init, + .init_task = (void *) create_dsq_init_task, + .exit_task = (void *) create_dsq_exit_task, + .init = (void *) create_dsq_init, .name = "create_dsq", }; diff --git a/tools/testing/selftests/sched_ext/ddsp_bogus_dsq_fail.bpf.c b/tools/testing/selftests/sched_ext/ddsp_bogus_dsq_fail.bpf.c index e97ad41d354ad..37d9bf6fb7458 100644 --- a/tools/testing/selftests/sched_ext/ddsp_bogus_dsq_fail.bpf.c +++ b/tools/testing/selftests/sched_ext/ddsp_bogus_dsq_fail.bpf.c @@ -35,8 +35,8 @@ void BPF_STRUCT_OPS(ddsp_bogus_dsq_fail_exit, struct scx_exit_info *ei) SEC(".struct_ops.link") struct sched_ext_ops ddsp_bogus_dsq_fail_ops = { - .select_cpu = ddsp_bogus_dsq_fail_select_cpu, - .exit = ddsp_bogus_dsq_fail_exit, + .select_cpu = (void *) ddsp_bogus_dsq_fail_select_cpu, + .exit = (void *) ddsp_bogus_dsq_fail_exit, .name = "ddsp_bogus_dsq_fail", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/ddsp_vtimelocal_fail.bpf.c b/tools/testing/selftests/sched_ext/ddsp_vtimelocal_fail.bpf.c index dde7e7dafbfbc..dffc97d9cdf14 100644 --- a/tools/testing/selftests/sched_ext/ddsp_vtimelocal_fail.bpf.c +++ b/tools/testing/selftests/sched_ext/ddsp_vtimelocal_fail.bpf.c @@ -32,8 +32,8 @@ void BPF_STRUCT_OPS(ddsp_vtimelocal_fail_exit, struct scx_exit_info *ei) SEC(".struct_ops.link") struct sched_ext_ops ddsp_vtimelocal_fail_ops = { - .select_cpu = ddsp_vtimelocal_fail_select_cpu, - .exit = ddsp_vtimelocal_fail_exit, + .select_cpu = (void *) ddsp_vtimelocal_fail_select_cpu, + .exit = (void *) ddsp_vtimelocal_fail_exit, .name = "ddsp_vtimelocal_fail", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/dsp_local_on.bpf.c b/tools/testing/selftests/sched_ext/dsp_local_on.bpf.c index efb4672decb41..6a7db1502c29e 100644 --- a/tools/testing/selftests/sched_ext/dsp_local_on.bpf.c +++ b/tools/testing/selftests/sched_ext/dsp_local_on.bpf.c @@ -56,10 +56,10 @@ void BPF_STRUCT_OPS(dsp_local_on_exit, struct scx_exit_info *ei) SEC(".struct_ops.link") struct sched_ext_ops dsp_local_on_ops = { - .select_cpu = dsp_local_on_select_cpu, - .enqueue = dsp_local_on_enqueue, - .dispatch = dsp_local_on_dispatch, - .exit = dsp_local_on_exit, + .select_cpu = (void *) dsp_local_on_select_cpu, + .enqueue = (void *) dsp_local_on_enqueue, + .dispatch = (void *) dsp_local_on_dispatch, + .exit = (void *) dsp_local_on_exit, .name = "dsp_local_on", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/enq_select_cpu_fails.bpf.c b/tools/testing/selftests/sched_ext/enq_select_cpu_fails.bpf.c index b3dfc1033cd6a..1efb50d61040a 100644 --- a/tools/testing/selftests/sched_ext/enq_select_cpu_fails.bpf.c +++ b/tools/testing/selftests/sched_ext/enq_select_cpu_fails.bpf.c @@ -36,8 +36,8 @@ void BPF_STRUCT_OPS(enq_select_cpu_fails_enqueue, struct task_struct *p, SEC(".struct_ops.link") struct sched_ext_ops enq_select_cpu_fails_ops = { - .select_cpu = enq_select_cpu_fails_select_cpu, - .enqueue = enq_select_cpu_fails_enqueue, + .select_cpu = (void *) enq_select_cpu_fails_select_cpu, + .enqueue = (void *) enq_select_cpu_fails_enqueue, .name = "enq_select_cpu_fails", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/exit.bpf.c b/tools/testing/selftests/sched_ext/exit.bpf.c index ae12ddaac921b..bf79ccd55f8f0 100644 --- a/tools/testing/selftests/sched_ext/exit.bpf.c +++ b/tools/testing/selftests/sched_ext/exit.bpf.c @@ -72,13 +72,13 @@ s32 BPF_STRUCT_OPS_SLEEPABLE(exit_init) SEC(".struct_ops.link") struct sched_ext_ops exit_ops = { - .select_cpu = exit_select_cpu, - .enqueue = exit_enqueue, - .dispatch = exit_dispatch, - .init_task = exit_init_task, - .enable = exit_enable, - .exit = exit_exit, - .init = exit_init, + .select_cpu = (void *) exit_select_cpu, + .enqueue = (void *) exit_enqueue, + .dispatch = (void *) exit_dispatch, + .init_task = (void *) exit_init_task, + .enable = (void *) exit_enable, + .exit = (void *) exit_exit, + .init = (void *) exit_init, .name = "exit", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/hotplug.bpf.c b/tools/testing/selftests/sched_ext/hotplug.bpf.c index 8f2601db39f37..6c9f25c9bf53e 100644 --- a/tools/testing/selftests/sched_ext/hotplug.bpf.c +++ b/tools/testing/selftests/sched_ext/hotplug.bpf.c @@ -46,16 +46,16 @@ void BPF_STRUCT_OPS_SLEEPABLE(hotplug_cpu_offline, s32 cpu) SEC(".struct_ops.link") struct sched_ext_ops hotplug_cb_ops = { - .cpu_online = hotplug_cpu_online, - .cpu_offline = hotplug_cpu_offline, - .exit = hotplug_exit, + .cpu_online = (void *) hotplug_cpu_online, + .cpu_offline = (void *) hotplug_cpu_offline, + .exit = (void *) hotplug_exit, .name = "hotplug_cbs", .timeout_ms = 1000U, }; SEC(".struct_ops.link") struct sched_ext_ops hotplug_nocb_ops = { - .exit = hotplug_exit, + .exit = (void *) hotplug_exit, .name = "hotplug_nocbs", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/init_enable_count.bpf.c b/tools/testing/selftests/sched_ext/init_enable_count.bpf.c index 47ea89a626c37..5eb9edb1837dc 100644 --- a/tools/testing/selftests/sched_ext/init_enable_count.bpf.c +++ b/tools/testing/selftests/sched_ext/init_enable_count.bpf.c @@ -45,9 +45,9 @@ void BPF_STRUCT_OPS(cnt_disable, struct task_struct *p) SEC(".struct_ops.link") struct sched_ext_ops init_enable_count_ops = { - .init_task = cnt_init_task, - .exit_task = cnt_exit_task, - .enable = cnt_enable, - .disable = cnt_disable, + .init_task = (void *) cnt_init_task, + .exit_task = (void *) cnt_exit_task, + .enable = (void *) cnt_enable, + .disable = (void *) cnt_disable, .name = "init_enable_count", }; diff --git a/tools/testing/selftests/sched_ext/maximal.bpf.c b/tools/testing/selftests/sched_ext/maximal.bpf.c index 00bfa9cb95d38..4d4cd8d966dba 100644 --- a/tools/testing/selftests/sched_ext/maximal.bpf.c +++ b/tools/testing/selftests/sched_ext/maximal.bpf.c @@ -131,34 +131,34 @@ void BPF_STRUCT_OPS(maximal_exit, struct scx_exit_info *info) SEC(".struct_ops.link") struct sched_ext_ops maximal_ops = { - .select_cpu = maximal_select_cpu, - .enqueue = maximal_enqueue, - .dequeue = maximal_dequeue, - .dispatch = maximal_dispatch, - .runnable = maximal_runnable, - .running = maximal_running, - .stopping = maximal_stopping, - .quiescent = maximal_quiescent, - .yield = maximal_yield, - .core_sched_before = maximal_core_sched_before, - .set_weight = maximal_set_weight, - .set_cpumask = maximal_set_cpumask, - .update_idle = maximal_update_idle, - .cpu_acquire = maximal_cpu_acquire, - .cpu_release = maximal_cpu_release, - .cpu_online = maximal_cpu_online, - .cpu_offline = maximal_cpu_offline, - .init_task = maximal_init_task, - .enable = maximal_enable, - .exit_task = maximal_exit_task, - .disable = maximal_disable, - .cgroup_init = maximal_cgroup_init, - .cgroup_exit = maximal_cgroup_exit, - .cgroup_prep_move = maximal_cgroup_prep_move, - .cgroup_move = maximal_cgroup_move, - .cgroup_cancel_move = maximal_cgroup_cancel_move, - .cgroup_set_weight = maximal_cgroup_set_weight, - .init = maximal_init, - .exit = maximal_exit, + .select_cpu = (void *) maximal_select_cpu, + .enqueue = (void *) maximal_enqueue, + .dequeue = (void *) maximal_dequeue, + .dispatch = (void *) maximal_dispatch, + .runnable = (void *) maximal_runnable, + .running = (void *) maximal_running, + .stopping = (void *) maximal_stopping, + .quiescent = (void *) maximal_quiescent, + .yield = (void *) maximal_yield, + .core_sched_before = (void *) maximal_core_sched_before, + .set_weight = (void *) maximal_set_weight, + .set_cpumask = (void *) maximal_set_cpumask, + .update_idle = (void *) maximal_update_idle, + .cpu_acquire = (void *) maximal_cpu_acquire, + .cpu_release = (void *) maximal_cpu_release, + .cpu_online = (void *) maximal_cpu_online, + .cpu_offline = (void *) maximal_cpu_offline, + .init_task = (void *) maximal_init_task, + .enable = (void *) maximal_enable, + .exit_task = (void *) maximal_exit_task, + .disable = (void *) maximal_disable, + .cgroup_init = (void *) maximal_cgroup_init, + .cgroup_exit = (void *) maximal_cgroup_exit, + .cgroup_prep_move = (void *) maximal_cgroup_prep_move, + .cgroup_move = (void *) maximal_cgroup_move, + .cgroup_cancel_move = (void *) maximal_cgroup_cancel_move, + .cgroup_set_weight = (void *) maximal_cgroup_set_weight, + .init = (void *) maximal_init, + .exit = (void *) maximal_exit, .name = "maximal", }; diff --git a/tools/testing/selftests/sched_ext/maybe_null.bpf.c b/tools/testing/selftests/sched_ext/maybe_null.bpf.c index 27d0f386acfb1..cf4ae870cd4e5 100644 --- a/tools/testing/selftests/sched_ext/maybe_null.bpf.c +++ b/tools/testing/selftests/sched_ext/maybe_null.bpf.c @@ -29,8 +29,8 @@ bool BPF_STRUCT_OPS(maybe_null_success_yield, struct task_struct *from, SEC(".struct_ops.link") struct sched_ext_ops maybe_null_success = { - .dispatch = maybe_null_success_dispatch, - .yield = maybe_null_success_yield, - .enable = maybe_null_running, + .dispatch = (void *) maybe_null_success_dispatch, + .yield = (void *) maybe_null_success_yield, + .enable = (void *) maybe_null_running, .name = "minimal", }; diff --git a/tools/testing/selftests/sched_ext/maybe_null_fail_dsp.bpf.c b/tools/testing/selftests/sched_ext/maybe_null_fail_dsp.bpf.c index c0641050271d3..ec724d7b33d18 100644 --- a/tools/testing/selftests/sched_ext/maybe_null_fail_dsp.bpf.c +++ b/tools/testing/selftests/sched_ext/maybe_null_fail_dsp.bpf.c @@ -19,7 +19,7 @@ void BPF_STRUCT_OPS(maybe_null_fail_dispatch, s32 cpu, struct task_struct *p) SEC(".struct_ops.link") struct sched_ext_ops maybe_null_fail = { - .dispatch = maybe_null_fail_dispatch, - .enable = maybe_null_running, + .dispatch = (void *) maybe_null_fail_dispatch, + .enable = (void *) maybe_null_running, .name = "maybe_null_fail_dispatch", }; diff --git a/tools/testing/selftests/sched_ext/maybe_null_fail_yld.bpf.c b/tools/testing/selftests/sched_ext/maybe_null_fail_yld.bpf.c index 3c1740028e3b9..e6552cace020e 100644 --- a/tools/testing/selftests/sched_ext/maybe_null_fail_yld.bpf.c +++ b/tools/testing/selftests/sched_ext/maybe_null_fail_yld.bpf.c @@ -22,7 +22,7 @@ bool BPF_STRUCT_OPS(maybe_null_fail_yield, struct task_struct *from, SEC(".struct_ops.link") struct sched_ext_ops maybe_null_fail = { - .yield = maybe_null_fail_yield, - .enable = maybe_null_running, + .yield = (void *) maybe_null_fail_yield, + .enable = (void *) maybe_null_running, .name = "maybe_null_fail_yield", }; diff --git a/tools/testing/selftests/sched_ext/prog_run.bpf.c b/tools/testing/selftests/sched_ext/prog_run.bpf.c index 6a4d7c48e3f22..00c267626a68f 100644 --- a/tools/testing/selftests/sched_ext/prog_run.bpf.c +++ b/tools/testing/selftests/sched_ext/prog_run.bpf.c @@ -28,6 +28,6 @@ void BPF_STRUCT_OPS(prog_run_exit, struct scx_exit_info *ei) SEC(".struct_ops.link") struct sched_ext_ops prog_run_ops = { - .exit = prog_run_exit, + .exit = (void *) prog_run_exit, .name = "prog_run", }; diff --git a/tools/testing/selftests/sched_ext/select_cpu_dfl.bpf.c b/tools/testing/selftests/sched_ext/select_cpu_dfl.bpf.c index 2ed2991afafe3..f171ac4709706 100644 --- a/tools/testing/selftests/sched_ext/select_cpu_dfl.bpf.c +++ b/tools/testing/selftests/sched_ext/select_cpu_dfl.bpf.c @@ -35,6 +35,6 @@ void BPF_STRUCT_OPS(select_cpu_dfl_enqueue, struct task_struct *p, SEC(".struct_ops.link") struct sched_ext_ops select_cpu_dfl_ops = { - .enqueue = select_cpu_dfl_enqueue, + .enqueue = (void *) select_cpu_dfl_enqueue, .name = "select_cpu_dfl", }; diff --git a/tools/testing/selftests/sched_ext/select_cpu_dfl_nodispatch.bpf.c b/tools/testing/selftests/sched_ext/select_cpu_dfl_nodispatch.bpf.c index 4bb5abb2d3690..9efdbb7da9288 100644 --- a/tools/testing/selftests/sched_ext/select_cpu_dfl_nodispatch.bpf.c +++ b/tools/testing/selftests/sched_ext/select_cpu_dfl_nodispatch.bpf.c @@ -82,8 +82,8 @@ s32 BPF_STRUCT_OPS(select_cpu_dfl_nodispatch_init_task, SEC(".struct_ops.link") struct sched_ext_ops select_cpu_dfl_nodispatch_ops = { - .select_cpu = select_cpu_dfl_nodispatch_select_cpu, - .enqueue = select_cpu_dfl_nodispatch_enqueue, - .init_task = select_cpu_dfl_nodispatch_init_task, + .select_cpu = (void *) select_cpu_dfl_nodispatch_select_cpu, + .enqueue = (void *) select_cpu_dfl_nodispatch_enqueue, + .init_task = (void *) select_cpu_dfl_nodispatch_init_task, .name = "select_cpu_dfl_nodispatch", }; diff --git a/tools/testing/selftests/sched_ext/select_cpu_dispatch.bpf.c b/tools/testing/selftests/sched_ext/select_cpu_dispatch.bpf.c index f0b96a4a04b2c..59bfc4f36167a 100644 --- a/tools/testing/selftests/sched_ext/select_cpu_dispatch.bpf.c +++ b/tools/testing/selftests/sched_ext/select_cpu_dispatch.bpf.c @@ -35,7 +35,7 @@ s32 BPF_STRUCT_OPS(select_cpu_dispatch_select_cpu, struct task_struct *p, SEC(".struct_ops.link") struct sched_ext_ops select_cpu_dispatch_ops = { - .select_cpu = select_cpu_dispatch_select_cpu, + .select_cpu = (void *) select_cpu_dispatch_select_cpu, .name = "select_cpu_dispatch", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/select_cpu_dispatch_bad_dsq.bpf.c b/tools/testing/selftests/sched_ext/select_cpu_dispatch_bad_dsq.bpf.c index 7b42ddce0f56c..3bbd5fcdfb18e 100644 --- a/tools/testing/selftests/sched_ext/select_cpu_dispatch_bad_dsq.bpf.c +++ b/tools/testing/selftests/sched_ext/select_cpu_dispatch_bad_dsq.bpf.c @@ -30,8 +30,8 @@ void BPF_STRUCT_OPS(select_cpu_dispatch_bad_dsq_exit, struct scx_exit_info *ei) SEC(".struct_ops.link") struct sched_ext_ops select_cpu_dispatch_bad_dsq_ops = { - .select_cpu = select_cpu_dispatch_bad_dsq_select_cpu, - .exit = select_cpu_dispatch_bad_dsq_exit, + .select_cpu = (void *) select_cpu_dispatch_bad_dsq_select_cpu, + .exit = (void *) select_cpu_dispatch_bad_dsq_exit, .name = "select_cpu_dispatch_bad_dsq", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/select_cpu_dispatch_dbl_dsp.bpf.c b/tools/testing/selftests/sched_ext/select_cpu_dispatch_dbl_dsp.bpf.c index 653e3dc0b4dc8..0fda57fe0ecfa 100644 --- a/tools/testing/selftests/sched_ext/select_cpu_dispatch_dbl_dsp.bpf.c +++ b/tools/testing/selftests/sched_ext/select_cpu_dispatch_dbl_dsp.bpf.c @@ -31,8 +31,8 @@ void BPF_STRUCT_OPS(select_cpu_dispatch_dbl_dsp_exit, struct scx_exit_info *ei) SEC(".struct_ops.link") struct sched_ext_ops select_cpu_dispatch_dbl_dsp_ops = { - .select_cpu = select_cpu_dispatch_dbl_dsp_select_cpu, - .exit = select_cpu_dispatch_dbl_dsp_exit, + .select_cpu = (void *) select_cpu_dispatch_dbl_dsp_select_cpu, + .exit = (void *) select_cpu_dispatch_dbl_dsp_exit, .name = "select_cpu_dispatch_dbl_dsp", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/select_cpu_vtime.bpf.c b/tools/testing/selftests/sched_ext/select_cpu_vtime.bpf.c index 7f3ebf4fc2ead..e6c67bcf5e6e3 100644 --- a/tools/testing/selftests/sched_ext/select_cpu_vtime.bpf.c +++ b/tools/testing/selftests/sched_ext/select_cpu_vtime.bpf.c @@ -81,12 +81,12 @@ s32 BPF_STRUCT_OPS_SLEEPABLE(select_cpu_vtime_init) SEC(".struct_ops.link") struct sched_ext_ops select_cpu_vtime_ops = { - .select_cpu = select_cpu_vtime_select_cpu, - .dispatch = select_cpu_vtime_dispatch, - .running = select_cpu_vtime_running, - .stopping = select_cpu_vtime_stopping, - .enable = select_cpu_vtime_enable, - .init = select_cpu_vtime_init, + .select_cpu = (void *) select_cpu_vtime_select_cpu, + .dispatch = (void *) select_cpu_vtime_dispatch, + .running = (void *) select_cpu_vtime_running, + .stopping = (void *) select_cpu_vtime_stopping, + .enable = (void *) select_cpu_vtime_enable, + .init = (void *) select_cpu_vtime_init, .name = "select_cpu_vtime", .timeout_ms = 1000U, }; -- 2.47.0

8 months, 1 week

2
1
0 0

Re: [PATCH V6 9/9] iommufd: map file selftest

by Steven Sistare

cc linux-selftest for this one patch of a series. No framework changes, only added new cases to existing iommufd selftests. The full series is here: https://lore.kernel.org/linux-iommu/1729783554-56916-1-git-send-email-steve… - Steve On 10/24/2024 11:25 AM, Steve Sistare wrote: > Add test cases to exercise IOMMU_IOAS_MAP_FILE. > > Signed-off-by: Steve Sistare <steven.sistare(a)oracle.com> > Reviewed-by: Nicolin Chen <nicolinc(a)nvidia.com> > --- > tools/testing/selftests/iommu/iommufd.c | 127 ++++++++++++++++++++--- > tools/testing/selftests/iommu/iommufd_fail_nth.c | 39 +++++++ > tools/testing/selftests/iommu/iommufd_utils.h | 57 ++++++++++ > 3 files changed, 208 insertions(+), 15 deletions(-) > > diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c > index 4927b9a..e379adf 100644 > --- a/tools/testing/selftests/iommu/iommufd.c > +++ b/tools/testing/selftests/iommu/iommufd.c > @@ -1,5 +1,6 @@ > // SPDX-License-Identifier: GPL-2.0-only > /* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES */ > +#include <asm/unistd.h> > #include <stdlib.h> > #include <sys/mman.h> > #include <sys/eventfd.h> > @@ -49,6 +50,9 @@ static __attribute__((constructor)) void setup_sizes(void) > vrc = mmap(buffer, BUFFER_SIZE, PROT_READ | PROT_WRITE, > MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0); > assert(vrc == buffer); > + > + mfd_buffer = memfd_mmap(BUFFER_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, > + &mfd); > } > > FIXTURE(iommufd) > @@ -128,6 +132,7 @@ static __attribute__((constructor)) void setup_sizes(void) > TEST_LENGTH(iommu_ioas_unmap, IOMMU_IOAS_UNMAP, length); > TEST_LENGTH(iommu_option, IOMMU_OPTION, val64); > TEST_LENGTH(iommu_vfio_ioas, IOMMU_VFIO_IOAS, __reserved); > + TEST_LENGTH(iommu_ioas_map_file, IOMMU_IOAS_MAP_FILE, iova); > #undef TEST_LENGTH > } > > @@ -1372,6 +1377,7 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > { > unsigned int mock_domains; > bool hugepages; > + bool file; > }; > > FIXTURE_SETUP(iommufd_mock_domain) > @@ -1410,26 +1416,45 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > { > .mock_domains = 1, > .hugepages = false, > + .file = false, > }; > > FIXTURE_VARIANT_ADD(iommufd_mock_domain, two_domains) > { > .mock_domains = 2, > .hugepages = false, > + .file = false, > }; > > FIXTURE_VARIANT_ADD(iommufd_mock_domain, one_domain_hugepage) > { > .mock_domains = 1, > .hugepages = true, > + .file = false, > }; > > FIXTURE_VARIANT_ADD(iommufd_mock_domain, two_domains_hugepage) > { > .mock_domains = 2, > .hugepages = true, > + .file = false, > }; > > +FIXTURE_VARIANT_ADD(iommufd_mock_domain, one_domain_file) > +{ > + .mock_domains = 1, > + .hugepages = false, > + .file = true, > +}; > + > +FIXTURE_VARIANT_ADD(iommufd_mock_domain, one_domain_file_hugepage) > +{ > + .mock_domains = 1, > + .hugepages = true, > + .file = true, > +}; > + > + > /* Have the kernel check that the user pages made it to the iommu_domain */ > #define check_mock_iova(_ptr, _iova, _length) \ > ({ \ > @@ -1455,7 +1480,10 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > } \ > }) > > -TEST_F(iommufd_mock_domain, basic) > +static void > +test_basic_mmap(struct __test_metadata *_metadata, > + struct _test_data_iommufd_mock_domain *self, > + const struct _fixture_variant_iommufd_mock_domain *variant) > { > size_t buf_size = self->mmap_buf_size; > uint8_t *buf; > @@ -1478,6 +1506,43 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > test_err_ioctl_ioas_map(EFAULT, buf, buf_size, &iova); > } > > +static void > +test_basic_file(struct __test_metadata *_metadata, > + struct _test_data_iommufd_mock_domain *self, > + const struct _fixture_variant_iommufd_mock_domain *variant) > +{ > + size_t buf_size = self->mmap_buf_size; > + uint8_t *buf; > + __u64 iova; > + int mfd_tmp; > + int prot = PROT_READ | PROT_WRITE; > + > + /* Simple one page map */ > + test_ioctl_ioas_map_file(mfd, 0, PAGE_SIZE, &iova); > + check_mock_iova(mfd_buffer, iova, PAGE_SIZE); > + > + buf = memfd_mmap(buf_size, prot, MAP_SHARED, &mfd_tmp); > + ASSERT_NE(MAP_FAILED, buf); > + > + /* EFAULT half way through mapping */ > + ASSERT_EQ(0, munmap(buf + buf_size / 2, buf_size / 2)); > + test_err_ioctl_ioas_map_file(EFAULT, 0, buf_size, &iova); > + > + /* EFAULT on first page */ > + ASSERT_EQ(0, munmap(buf, buf_size / 2)); > + test_err_ioctl_ioas_map_file(EFAULT, 0, buf_size, &iova); > + > + close(mfd_tmp); > +} > + > +TEST_F(iommufd_mock_domain, basic) > +{ > + if (variant->file) > + test_basic_file(_metadata, self, variant); > + else > + test_basic_mmap(_metadata, self, variant); > +} > + > TEST_F(iommufd_mock_domain, ro_unshare) > { > uint8_t *buf; > @@ -1513,9 +1578,13 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > unsigned int start; > unsigned int end; > uint8_t *buf; > + int prot = PROT_READ | PROT_WRITE; > + int mfd; > > - buf = mmap(0, buf_size, PROT_READ | PROT_WRITE, self->mmap_flags, -1, > - 0); > + if (variant->file) > + buf = memfd_mmap(buf_size, prot, MAP_SHARED, &mfd); > + else > + buf = mmap(0, buf_size, prot, self->mmap_flags, -1, 0); > ASSERT_NE(MAP_FAILED, buf); > check_refs(buf, buf_size, 0); > > @@ -1532,7 +1601,12 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > size_t length = end - start; > __u64 iova; > > - test_ioctl_ioas_map(buf + start, length, &iova); > + if (variant->file) { > + test_ioctl_ioas_map_file(mfd, start, length, > + &iova); > + } else { > + test_ioctl_ioas_map(buf + start, length, &iova); > + } > check_mock_iova(buf + start, iova, length); > check_refs(buf + start / PAGE_SIZE * PAGE_SIZE, > end / PAGE_SIZE * PAGE_SIZE - > @@ -1544,6 +1618,8 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > } > check_refs(buf, buf_size, 0); > ASSERT_EQ(0, munmap(buf, buf_size)); > + if (variant->file) > + close(mfd); > } > > TEST_F(iommufd_mock_domain, all_aligns_copy) > @@ -1554,9 +1630,13 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > unsigned int start; > unsigned int end; > uint8_t *buf; > + int prot = PROT_READ | PROT_WRITE; > + int mfd; > > - buf = mmap(0, buf_size, PROT_READ | PROT_WRITE, self->mmap_flags, -1, > - 0); > + if (variant->file) > + buf = memfd_mmap(buf_size, prot, MAP_SHARED, &mfd); > + else > + buf = mmap(0, buf_size, prot, self->mmap_flags, -1, 0); > ASSERT_NE(MAP_FAILED, buf); > check_refs(buf, buf_size, 0); > > @@ -1575,7 +1655,12 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > uint32_t mock_stdev_id; > __u64 iova; > > - test_ioctl_ioas_map(buf + start, length, &iova); > + if (variant->file) { > + test_ioctl_ioas_map_file(mfd, start, length, > + &iova); > + } else { > + test_ioctl_ioas_map(buf + start, length, &iova); > + } > > /* Add and destroy a domain while the area exists */ > old_id = self->hwpt_ids[1]; > @@ -1596,15 +1681,18 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > } > check_refs(buf, buf_size, 0); > ASSERT_EQ(0, munmap(buf, buf_size)); > + if (variant->file) > + close(mfd); > } > > TEST_F(iommufd_mock_domain, user_copy) > { > + void *buf = variant->file ? mfd_buffer : buffer; > struct iommu_test_cmd access_cmd = { > .size = sizeof(access_cmd), > .op = IOMMU_TEST_OP_ACCESS_PAGES, > .access_pages = { .length = BUFFER_SIZE, > - .uptr = (uintptr_t)buffer }, > + .uptr = (uintptr_t)buf }, > }; > struct iommu_ioas_copy copy_cmd = { > .size = sizeof(copy_cmd), > @@ -1623,9 +1711,13 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > > /* Pin the pages in an IOAS with no domains then copy to an IOAS with domains */ > test_ioctl_ioas_alloc(&ioas_id); > - test_ioctl_ioas_map_id(ioas_id, buffer, BUFFER_SIZE, > - &copy_cmd.src_iova); > - > + if (variant->file) { > + test_ioctl_ioas_map_id_file(ioas_id, mfd, 0, BUFFER_SIZE, > + &copy_cmd.src_iova); > + } else { > + test_ioctl_ioas_map_id(ioas_id, buf, BUFFER_SIZE, > + &copy_cmd.src_iova); > + } > test_cmd_create_access(ioas_id, &access_cmd.id, > MOCK_FLAGS_ACCESS_CREATE_NEEDS_PIN_PAGES); > > @@ -1635,12 +1727,17 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > &access_cmd)); > copy_cmd.src_ioas_id = ioas_id; > ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, &copy_cmd)); > - check_mock_iova(buffer, MOCK_APERTURE_START, BUFFER_SIZE); > + check_mock_iova(buf, MOCK_APERTURE_START, BUFFER_SIZE); > > /* Now replace the ioas with a new one */ > test_ioctl_ioas_alloc(&new_ioas_id); > - test_ioctl_ioas_map_id(new_ioas_id, buffer, BUFFER_SIZE, > - &copy_cmd.src_iova); > + if (variant->file) { > + test_ioctl_ioas_map_id_file(new_ioas_id, mfd, 0, BUFFER_SIZE, > + &copy_cmd.src_iova); > + } else { > + test_ioctl_ioas_map_id(new_ioas_id, buf, BUFFER_SIZE, > + &copy_cmd.src_iova); > + } > test_cmd_access_replace_ioas(access_cmd.id, new_ioas_id); > > /* Destroy the old ioas and cleanup copied mapping */ > @@ -1654,7 +1751,7 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd, > &access_cmd)); > copy_cmd.src_ioas_id = new_ioas_id; > ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, &copy_cmd)); > - check_mock_iova(buffer, MOCK_APERTURE_START, BUFFER_SIZE); > + check_mock_iova(buf, MOCK_APERTURE_START, BUFFER_SIZE); > > test_cmd_destroy_access_pages( > access_cmd.id, access_cmd.access_pages.out_access_pages_id); > diff --git a/tools/testing/selftests/iommu/iommufd_fail_nth.c b/tools/testing/selftests/iommu/iommufd_fail_nth.c > index c5d5e69..2d7d016 100644 > --- a/tools/testing/selftests/iommu/iommufd_fail_nth.c > +++ b/tools/testing/selftests/iommu/iommufd_fail_nth.c > @@ -47,6 +47,9 @@ static __attribute__((constructor)) void setup_buffer(void) > > buffer = mmap(0, BUFFER_SIZE, PROT_READ | PROT_WRITE, > MAP_SHARED | MAP_ANONYMOUS, -1, 0); > + > + mfd_buffer = memfd_mmap(BUFFER_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, > + &mfd); > } > > /* > @@ -331,6 +334,42 @@ void __fail_nth_enable(struct __test_metadata *_metadata, > return 0; > } > > +/* iopt_area_fill_domains() and iopt_area_fill_domain() */ > +TEST_FAIL_NTH(basic_fail_nth, map_file_domain) > +{ > + uint32_t ioas_id; > + __u32 stdev_id; > + __u32 hwpt_id; > + __u64 iova; > + > + self->fd = open("/dev/iommu", O_RDWR); > + if (self->fd == -1) > + return -1; > + > + if (_test_ioctl_ioas_alloc(self->fd, &ioas_id)) > + return -1; > + > + if (_test_ioctl_set_temp_memory_limit(self->fd, 32)) > + return -1; > + > + fail_nth_enable(); > + > + if (_test_cmd_mock_domain(self->fd, ioas_id, &stdev_id, &hwpt_id, NULL)) > + return -1; > + > + if (_test_ioctl_ioas_map_file(self->fd, ioas_id, mfd, 0, 262144, &iova, > + IOMMU_IOAS_MAP_WRITEABLE | > + IOMMU_IOAS_MAP_READABLE)) > + return -1; > + > + if (_test_ioctl_destroy(self->fd, stdev_id)) > + return -1; > + > + if (_test_cmd_mock_domain(self->fd, ioas_id, &stdev_id, &hwpt_id, NULL)) > + return -1; > + return 0; > +} > + > TEST_FAIL_NTH(basic_fail_nth, map_two_domains) > { > uint32_t ioas_id; > diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h > index 40f6f14..6a11c26 100644 > --- a/tools/testing/selftests/iommu/iommufd_utils.h > +++ b/tools/testing/selftests/iommu/iommufd_utils.h > @@ -40,12 +40,28 @@ static inline bool test_bit(unsigned int nr, unsigned long *addr) > static void *buffer; > static unsigned long BUFFER_SIZE; > > +static void *mfd_buffer; > +static int mfd; > + > static unsigned long PAGE_SIZE; > > #define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER)) > #define offsetofend(TYPE, MEMBER) \ > (offsetof(TYPE, MEMBER) + sizeof_field(TYPE, MEMBER)) > > +static inline void *memfd_mmap(size_t length, int prot, int flags, int *mfd_p) > +{ > + int mfd_flags = (flags & MAP_HUGETLB) ? MFD_HUGETLB : 0; > + int mfd = memfd_create("buffer", mfd_flags); > + > + if (mfd <= 0) > + return MAP_FAILED; > + if (ftruncate(mfd, length)) > + return MAP_FAILED; > + *mfd_p = mfd; > + return mmap(0, length, prot, flags, mfd, 0); > +} > + > /* > * Have the kernel check the refcount on pages. I don't know why a freshly > * mmap'd anon non-compound page starts out with a ref of 3 > @@ -589,6 +605,47 @@ static int _test_ioctl_ioas_unmap(int fd, unsigned int ioas_id, uint64_t iova, > EXPECT_ERRNO(_errno, _test_ioctl_ioas_unmap(self->fd, self->ioas_id, \ > iova, length, NULL)) > > +static int _test_ioctl_ioas_map_file(int fd, unsigned int ioas_id, int mfd, > + size_t start, size_t length, __u64 *iova, > + unsigned int flags) > +{ > + struct iommu_ioas_map_file cmd = { > + .size = sizeof(cmd), > + .flags = flags, > + .ioas_id = ioas_id, > + .fd = mfd, > + .start = start, > + .length = length, > + }; > + int ret; > + > + if (flags & IOMMU_IOAS_MAP_FIXED_IOVA) > + cmd.iova = *iova; > + > + ret = ioctl(fd, IOMMU_IOAS_MAP_FILE, &cmd); > + *iova = cmd.iova; > + return ret; > +} > + > +#define test_ioctl_ioas_map_file(mfd, start, length, iova_p) \ > + ASSERT_EQ(0, \ > + _test_ioctl_ioas_map_file( \ > + self->fd, self->ioas_id, mfd, start, length, iova_p, \ > + IOMMU_IOAS_MAP_WRITEABLE | IOMMU_IOAS_MAP_READABLE)) > + > +#define test_err_ioctl_ioas_map_file(_errno, mfd, start, length, iova_p) \ > + EXPECT_ERRNO( \ > + _errno, \ > + _test_ioctl_ioas_map_file( \ > + self->fd, self->ioas_id, mfd, start, length, iova_p, \ > + IOMMU_IOAS_MAP_WRITEABLE | IOMMU_IOAS_MAP_READABLE)) > + > +#define test_ioctl_ioas_map_id_file(ioas_id, mfd, start, length, iova_p) \ > + ASSERT_EQ(0, \ > + _test_ioctl_ioas_map_file( \ > + self->fd, ioas_id, mfd, start, length, iova_p, \ > + IOMMU_IOAS_MAP_WRITEABLE | IOMMU_IOAS_MAP_READABLE)) > + > static int _test_ioctl_set_temp_memory_limit(int fd, unsigned int limit) > { > struct iommu_test_cmd memlimit_cmd = {

8 months, 1 week

1
0
0 0

[PATCH v3] selftest: remoteproc: Add test for start/stop sequence

by Wasim Nazir

Add test to validate end-to-end start/stop sequence for each remoteproc instances available on target. Add first test sequence to validated each instance sequencially to identify any issue while booting each instance. Add second test sequence to validate all instances concurrently to identify any race scenario within instances doing bootup. Additional user argument (--seqdelay) is available to add delay is seconds, between start/stop sequence. This is added as different target might have different threshold to start any instance (default is 5 secs). Running tests: ./remoteproc_test.sh --seqdelay 10 Signed-off-by: Wasim Nazir <quic_wasimn(a)quicinc.com> --- MAINTAINERS | 1 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/remoteproc/Makefile | 4 + tools/testing/selftests/remoteproc/config | 1 + .../selftests/remoteproc/remoteproc_test.sh | 157 ++++++++++++++++++ 5 files changed, 164 insertions(+) create mode 100644 tools/testing/selftests/remoteproc/Makefile create mode 100644 tools/testing/selftests/remoteproc/config create mode 100644 tools/testing/selftests/remoteproc/remoteproc_test.sh Test output with 4 remoteproc instances: TAP version 13 1..5 # Testing rproc start/stop sequence for each instance sequencially # Testing rproc sequence for 4080000.remoteproc ok 1 4080000.remoteproc # Testing rproc sequence for 3700000.remoteproc ok 2 3700000.remoteproc # Testing rproc sequence for 8a00000.remoteproc ok 3 8a00000.remoteproc # Testing rproc sequence for a300000.remoteproc ok 4 a300000.remoteproc # Testing rproc start/stop sequence for all instances concurrently ok 5 for all remoteproc0 remoteproc1 remoteproc2 remoteproc3 # Totals: pass:5 fail:0 xfail:0 xpass:0 skip:0 error:0 Changes in v3: - Add user argument for sequence delay (--sedelay). - Update commit & add comments. - v2: https://lore.kernel.org/all/20240927112132.3927298-1-quic_wasimn@quicinc.co… diff --git a/MAINTAINERS b/MAINTAINERS index e9659a5a7fb3..1f8182473be1 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19481,6 +19481,7 @@ F: Documentation/staging/remoteproc.rst F: drivers/remoteproc/ F: include/linux/remoteproc.h F: include/linux/remoteproc/ +F: tools/testing/selftests/remoteproc/ REMOTE PROCESSOR MESSAGING (RPMSG) SUBSYSTEM M: Bjorn Andersson <andersson(a)kernel.org> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index 363d031a16f7..78669153be90 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -82,6 +82,7 @@ TARGETS += proc TARGETS += pstore TARGETS += ptrace TARGETS += openat2 +TARGETS += remoteproc TARGETS += resctrl TARGETS += riscv TARGETS += rlimits diff --git a/tools/testing/selftests/remoteproc/Makefile b/tools/testing/selftests/remoteproc/Makefile new file mode 100644 index 000000000000..a84b3934fd36 --- /dev/null +++ b/tools/testing/selftests/remoteproc/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0 +TEST_PROGS := remoteproc_test.sh + +include ../lib.mk diff --git a/tools/testing/selftests/remoteproc/config b/tools/testing/selftests/remoteproc/config new file mode 100644 index 000000000000..a5c237d2f3b4 --- /dev/null +++ b/tools/testing/selftests/remoteproc/config @@ -0,0 +1 @@ +CONFIG_REMOTEPROC=y diff --git a/tools/testing/selftests/remoteproc/remoteproc_test.sh b/tools/testing/selftests/remoteproc/remoteproc_test.sh new file mode 100644 index 000000000000..d58c1e10005c --- /dev/null +++ b/tools/testing/selftests/remoteproc/remoteproc_test.sh @@ -0,0 +1,157 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved. +# + +DIR="$(dirname $(readlink -f "$0"))" + +KTAP_HELPERS="${DIR}/../kselftest/ktap_helpers.sh" +if [ -e "$KTAP_HELPERS" ]; then + . "$KTAP_HELPERS" +else + echo -n "1..0 # SKIP $KTAP_HELPERS file not found" + exit 4 +fi + +RPROC_SYS=/sys/class/remoteproc +RPROC_SEQ_SLEEP=5 + +rproc_instances= +num_tests=0 +test_err=0 + +check_error() { + if [ $? -ne 0 ]; then + test_err=$((test_err+1)) + ktap_print_msg "$@" + fi +} + +parse_args() { + script=${0##*/} + + if [ $# -eq 2 ] && [ "$1" = "--seqdelay" ]; then + shift || true + RPROC_SEQ_SLEEP=$1 + else + ktap_print_msg "Usage: ${script} --seqdelay <time in secs>" + ktap_print_msg "Proceed with default sequence delay = $RPROC_SEQ_SLEEP" + fi +} + +rproc_stop_instances() { + for instance in ${rproc_instances}; do + rproc=${RPROC_SYS}/$instance + rproc_name=$(cat $rproc/name) + rproc_state=$(cat $rproc/state) + + echo stop > "$rproc/state" + check_error "$rproc_name state-stop failed at state $rproc_state" + done + sleep ${RPROC_SEQ_SLEEP} +} + +rproc_start_instances() { + for instance in ${rproc_instances}; do + rproc=${RPROC_SYS}/$instance + rproc_name=$(cat $rproc/name) + rproc_state=$(cat $rproc/state) + + echo start > "$rproc/state" + check_error "$rproc_name state-start failed at state $rproc_state" + done + sleep ${RPROC_SEQ_SLEEP} +} + +rproc_seq_test_instance_one() { + instance=$1 + rproc=${RPROC_SYS}/$instance + rproc_name=$(cat $rproc/name) + rproc_state=$(cat $rproc/state) + ktap_print_msg "Testing rproc sequence for $rproc_name" + + # Reset test_err value + test_err=0 + + # Begin start/stop sequence + echo start > "$rproc/state" + check_error "$rproc_name state-start failed at state $rproc_state" + + sleep ${RPROC_SEQ_SLEEP} + + echo stop > "$rproc/state" + check_error "$rproc_name state-stop failed at state $rproc_state" + + if [ $test_err -ne 0 ]; then + ktap_test_fail "$rproc_name" + else + ktap_test_pass "$rproc_name" + fi +} + +rproc_seq_test_instances_concurrently() { + # Reset test_err value + test_err=0 + + rproc_start_instances + + rproc_stop_instances + + if [ $test_err -ne 0 ]; then + ktap_test_fail "for any of $rproc_instances" + else + ktap_test_pass "for all $rproc_instances" + fi +} + +################################# +### Test starts here +################################# + +ktap_print_header + +# Parse user arguments +parse_args $@ + +# Check for required sysfs entries +if [ ! -d "${RPROC_SYS}" ]; then + ktap_skip_all "${RPROC_SYS} doesn't exist." + exit "${KSFT_SKIP}" +fi + +rproc_instances=$(find ${RPROC_SYS}/remoteproc* -maxdepth 1 -exec basename {} \;) +num_tests=$(echo ${rproc_instances} | wc -w) +if [ "${num_tests}" -eq 0 ]; then + ktap_skip_all "${RPROC_SYS}/remoteproc* doesn't exist." + exit "${KSFT_SKIP}" +fi + +# Total tests will be: +# 1) Seq tests for each instance sequencially +# 2) Seq tests for all instances concurrently +num_tests=$((num_tests+1)) + +ktap_set_plan "${num_tests}" + +### Stop all instances +# +# Intention is to stop all running instances. If any instances are not yet +# started it will be don't care case as test_err is not checked. +# NOTE: Assuming no instances are in crashed state +rproc_stop_instances + +### Test 1 +ktap_print_msg "Testing rproc start/stop sequence for each instance sequencially" +for instance in ${rproc_instances}; do + rproc_seq_test_instance_one $instance +done + +### Test 2 +ktap_print_msg "Testing rproc start/stop sequence for all instances concurrently" +rproc_seq_test_instances_concurrently + +### Restore all instances +rproc_start_instances + +ktap_finished -- 2.46.1

8 months, 1 week

1
0
0 0

[PATCH net-next] selftests: tls: add a selftest for wrapping rec_seq

by Sabrina Dubroca

Set the initial rec_seq to 0xffffffffffffffff so that it wraps immediately. The send() call should fail with EBADMSG. A bug in this code was fixed in commit cfaa80c91f6f ("net/tls: do not free tls_rec on async operation in bpf_exec_tx_verdict()"). Signed-off-by: Sabrina Dubroca <sd(a)queasysnail.net> --- tools/testing/selftests/net/tls.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c index f27a12d2a2c9..1a706d03bb6b 100644 --- a/tools/testing/selftests/net/tls.c +++ b/tools/testing/selftests/net/tls.c @@ -266,6 +266,25 @@ TEST_F(tls_basic, bad_cipher) EXPECT_EQ(setsockopt(self->fd, SOL_TLS, TLS_TX, &tls12, sizeof(struct tls12_crypto_info_aes_gcm_128)), -1); } +TEST_F(tls_basic, recseq_wrap) +{ + struct tls_crypto_info_keys tls12; + char const *test_str = "test_read"; + int send_len = 10; + + if (self->notls) + SKIP(return, "no TLS support"); + + tls_crypto_info_init(TLS_1_2_VERSION, TLS_CIPHER_AES_GCM_128, &tls12); + memset(&tls12.aes128.rec_seq, 0xff, sizeof(tls12.aes128.rec_seq)); + + ASSERT_EQ(setsockopt(self->fd, SOL_TLS, TLS_TX, &tls12, tls12.len), 0); + ASSERT_EQ(setsockopt(self->cfd, SOL_TLS, TLS_RX, &tls12, tls12.len), 0); + + EXPECT_EQ(send(self->fd, test_str, send_len, 0), -1); + EXPECT_EQ(errno, EBADMSG); +} + FIXTURE(tls) { int fd, cfd; -- 2.47.0

8 months, 1 week

3
2
0 0

[PATCH RFC v2 0/4] mm: Introduce MAP_BELOW_HINT

by Charlie Jenkins

Some applications rely on placing data in free bits addresses allocated by mmap. Various architectures (eg. x86, arm64, powerpc) restrict the address returned by mmap to be less than the 48-bit address space, unless the hint address uses more than 47 bits (the 48th bit is reserved for the kernel address space). The riscv architecture needs a way to similarly restrict the virtual address space. On the riscv port of OpenJDK an error is thrown if attempted to run on the 57-bit address space, called sv57 [1]. golang has a comment that sv57 support is not complete, but there are some workarounds to get it to mostly work [2]. These applications work on x86 because x86 does an implicit 47-bit restriction of mmap() address that contain a hint address that is less than 48 bits. Instead of implicitly restricting the address space on riscv (or any current/future architecture), a flag would allow users to opt-in to this behavior rather than opt-out as is done on other architectures. This is desirable because it is a small class of applications that do pointer masking. This flag will also allow seemless compatibility between all architectures, so applications like Go and OpenJDK that use bits in a virtual address can request the exact number of bits they need in a generic way. The flag can be checked inside of vm_unmapped_area() so that this flag does not have to be handled individually by each architecture. Link: https://github.com/openjdk/jdk/blob/f080b4bb8a75284db1b6037f8c00ef3b1ef1add… [1] Link: https://github.com/golang/go/blob/9e8ea567c838574a0f14538c0bbbd83c3215aa55/… [2] To: Arnd Bergmann <arnd(a)arndb.de> To: Richard Henderson <richard.henderson(a)linaro.org> To: Ivan Kokshaysky <ink(a)jurassic.park.msu.ru> To: Matt Turner <mattst88(a)gmail.com> To: Vineet Gupta <vgupta(a)kernel.org> To: Russell King <linux(a)armlinux.org.uk> To: Guo Ren <guoren(a)kernel.org> To: Huacai Chen <chenhuacai(a)kernel.org> To: WANG Xuerui <kernel(a)xen0n.name> To: Thomas Bogendoerfer <tsbogend(a)alpha.franken.de> To: James E.J. Bottomley <James.Bottomley(a)HansenPartnership.com> To: Helge Deller <deller(a)gmx.de> To: Michael Ellerman <mpe(a)ellerman.id.au> To: Nicholas Piggin <npiggin(a)gmail.com> To: Christophe Leroy <christophe.leroy(a)csgroup.eu> To: Naveen N Rao <naveen(a)kernel.org> To: Alexander Gordeev <agordeev(a)linux.ibm.com> To: Gerald Schaefer <gerald.schaefer(a)linux.ibm.com> To: Heiko Carstens <hca(a)linux.ibm.com> To: Vasily Gorbik <gor(a)linux.ibm.com> To: Christian Borntraeger <borntraeger(a)linux.ibm.com> To: Sven Schnelle <svens(a)linux.ibm.com> To: Yoshinori Sato <ysato(a)users.sourceforge.jp> To: Rich Felker <dalias(a)libc.org> To: John Paul Adrian Glaubitz <glaubitz(a)physik.fu-berlin.de> To: David S. Miller <davem(a)davemloft.net> To: Andreas Larsson <andreas(a)gaisler.com> To: Thomas Gleixner <tglx(a)linutronix.de> To: Ingo Molnar <mingo(a)redhat.com> To: Borislav Petkov <bp(a)alien8.de> To: Dave Hansen <dave.hansen(a)linux.intel.com> To: x86(a)kernel.org To: H. Peter Anvin <hpa(a)zytor.com> To: Andy Lutomirski <luto(a)kernel.org> To: Peter Zijlstra <peterz(a)infradead.org> To: Muchun Song <muchun.song(a)linux.dev> To: Andrew Morton <akpm(a)linux-foundation.org> To: Liam R. Howlett <Liam.Howlett(a)oracle.com> To: Vlastimil Babka <vbabka(a)suse.cz> To: Lorenzo Stoakes <lorenzo.stoakes(a)oracle.com> To: Shuah Khan <shuah(a)kernel.org> Cc: linux-arch(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Cc: linux-alpha(a)vger.kernel.org Cc: linux-snps-arc(a)lists.infradead.org Cc: linux-arm-kernel(a)lists.infradead.org Cc: linux-csky(a)vger.kernel.org Cc: loongarch(a)lists.linux.dev Cc: linux-mips(a)vger.kernel.org Cc: linux-parisc(a)vger.kernel.org Cc: linuxppc-dev(a)lists.ozlabs.org Cc: linux-s390(a)vger.kernel.org Cc: linux-sh(a)vger.kernel.org Cc: sparclinux(a)vger.kernel.org Cc: linux-mm(a)kvack.org Cc: linux-kselftest(a)vger.kernel.org Signed-off-by: Charlie Jenkins <charlie(a)rivosinc.com> Changes in v2: - Added much greater detail to cover letter - Removed all code that touched architecture specific code and was able to factor this out into all generic functions, except for flags that needed to be added to vm_unmapped_area_info - Made this an RFC since I have only tested it on riscv and x86 - Link to v1: https://lore.kernel.org/r/20240827-patches-below_hint_mmap-v1-0-46ff2eb9022… --- Charlie Jenkins (4): mm: Add MAP_BELOW_HINT mm: Add hint and mmap_flags to struct vm_unmapped_area_info mm: Support MAP_BELOW_HINT in vm_unmapped_area() selftests/mm: Create MAP_BELOW_HINT test arch/alpha/kernel/osf_sys.c | 2 ++ arch/arc/mm/mmap.c | 3 +++ arch/arm/mm/mmap.c | 7 ++++++ arch/csky/abiv1/mmap.c | 3 +++ arch/loongarch/mm/mmap.c | 3 +++ arch/mips/mm/mmap.c | 3 +++ arch/parisc/kernel/sys_parisc.c | 3 +++ arch/powerpc/mm/book3s64/slice.c | 7 ++++++ arch/s390/mm/hugetlbpage.c | 4 ++++ arch/s390/mm/mmap.c | 6 ++++++ arch/sh/mm/mmap.c | 6 ++++++ arch/sparc/kernel/sys_sparc_32.c | 3 +++ arch/sparc/kernel/sys_sparc_64.c | 6 ++++++ arch/sparc/mm/hugetlbpage.c | 4 ++++ arch/x86/kernel/sys_x86_64.c | 6 ++++++ arch/x86/mm/hugetlbpage.c | 4 ++++ fs/hugetlbfs/inode.c | 4 ++++ include/linux/mm.h | 2 ++ include/uapi/asm-generic/mman-common.h | 1 + mm/mmap.c | 9 ++++++++ tools/include/uapi/asm-generic/mman-common.h | 1 + tools/testing/selftests/mm/Makefile | 1 + tools/testing/selftests/mm/map_below_hint.c | 32 ++++++++++++++++++++++++++++ 23 files changed, 120 insertions(+) --- base-commit: 5be63fc19fcaa4c236b307420483578a56986a37 change-id: 20240827-patches-below_hint_mmap-b13d79ae1c55 -- - Charlie

8 months, 1 week

11
29
0 0

[PATCH net-next 4/8] selftests: net: lib: Move logging from forwarding/lib.sh here

by Petr Machata

Many net selftests invent their own logging helpers. These really should be in a library sourced by these tests. Currently forwarding/lib.sh has a suite of perfectly fine logging helpers, but sourcing a forwarding/ library from a higher-level directory smells of layering violation. In this patch, move the logging helpers to net/lib.sh so that every net test can use them. Together with the logging helpers, it's also necessary to move pause_on_fail(), and EXIT_STATUS and RET. Existing lib.sh users might be using these same names for their functions or variables. However lib.sh is always sourced near the top of the file (checked), and whatever new definitions will simply override the ones provided by lib.sh. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Amit Cohen <amcohen(a)nvidia.com> --- CC: Shuah Khan <shuah(a)kernel.org> CC: Benjamin Poirier <bpoirier(a)nvidia.com> CC: Hangbin Liu <liuhangbin(a)gmail.com> CC: linux-kselftest(a)vger.kernel.org CC: Jiri Pirko <jiri(a)resnulli.us> --- tools/testing/selftests/net/forwarding/lib.sh | 113 ----------------- tools/testing/selftests/net/lib.sh | 115 ++++++++++++++++++ 2 files changed, 115 insertions(+), 113 deletions(-) diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index 89c25f72b10c..41dd14c42c48 100644 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -48,7 +48,6 @@ declare -A NETIFS=( : "${WAIT_TIME:=5}" # Whether to pause on, respectively, after a failure and before cleanup. -: "${PAUSE_ON_FAIL:=no}" : "${PAUSE_ON_CLEANUP:=no}" # Whether to create virtual interfaces, and what netdevice type they should be. @@ -446,22 +445,6 @@ done ############################################################################## # Helpers -# Exit status to return at the end. Set in case one of the tests fails. -EXIT_STATUS=0 -# Per-test return value. Clear at the beginning of each test. -RET=0 - -ret_set_ksft_status() -{ - local ksft_status=$1; shift - local msg=$1; shift - - RET=$(ksft_status_merge $RET $ksft_status) - if (( $? )); then - retmsg=$msg - fi -} - # Whether FAILs should be interpreted as XFAILs. Internal. FAIL_TO_XFAIL= @@ -535,102 +518,6 @@ xfail_on_veth() fi } -log_test_result() -{ - local test_name=$1; shift - local opt_str=$1; shift - local result=$1; shift - local retmsg=$1; shift - - printf "TEST: %-60s [%s]\n" "$test_name $opt_str" "$result" - if [[ $retmsg ]]; then - printf "\t%s\n" "$retmsg" - fi -} - -pause_on_fail() -{ - if [[ $PAUSE_ON_FAIL == yes ]]; then - echo "Hit enter to continue, 'q' to quit" - read a - [[ $a == q ]] && exit 1 - fi -} - -handle_test_result_pass() -{ - local test_name=$1; shift - local opt_str=$1; shift - - log_test_result "$test_name" "$opt_str" " OK " -} - -handle_test_result_fail() -{ - local test_name=$1; shift - local opt_str=$1; shift - - log_test_result "$test_name" "$opt_str" FAIL "$retmsg" - pause_on_fail -} - -handle_test_result_xfail() -{ - local test_name=$1; shift - local opt_str=$1; shift - - log_test_result "$test_name" "$opt_str" XFAIL "$retmsg" - pause_on_fail -} - -handle_test_result_skip() -{ - local test_name=$1; shift - local opt_str=$1; shift - - log_test_result "$test_name" "$opt_str" SKIP "$retmsg" -} - -log_test() -{ - local test_name=$1 - local opt_str=$2 - - if [[ $# -eq 2 ]]; then - opt_str="($opt_str)" - fi - - if ((RET == ksft_pass)); then - handle_test_result_pass "$test_name" "$opt_str" - elif ((RET == ksft_xfail)); then - handle_test_result_xfail "$test_name" "$opt_str" - elif ((RET == ksft_skip)); then - handle_test_result_skip "$test_name" "$opt_str" - else - handle_test_result_fail "$test_name" "$opt_str" - fi - - EXIT_STATUS=$(ksft_exit_status_merge $EXIT_STATUS $RET) - return $RET -} - -log_test_skip() -{ - RET=$ksft_skip retmsg= log_test "$@" -} - -log_test_xfail() -{ - RET=$ksft_xfail retmsg= log_test "$@" -} - -log_info() -{ - local msg=$1 - - echo "INFO: $msg" -} - not() { "$@" diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index c8991cc6bf28..691318b1ec55 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -9,6 +9,9 @@ source "$net_dir/lib/sh/defer.sh" : "${WAIT_TIMEOUT:=20}" +# Whether to pause on after a failure. +: "${PAUSE_ON_FAIL:=no}" + BUSYWAIT_TIMEOUT=$((WAIT_TIMEOUT * 1000)) # ms # Kselftest framework constants. @@ -20,6 +23,11 @@ ksft_skip=4 # namespace list created by setup_ns NS_LIST=() +# Exit status to return at the end. Set in case one of the tests fails. +EXIT_STATUS=0 +# Per-test return value. Clear at the beginning of each test. +RET=0 + ############################################################################## # Helpers @@ -236,3 +244,110 @@ tc_rule_handle_stats_get() | jq ".[] | select(.options.handle == $handle) | \ .options.actions[0].stats$selector" } + +ret_set_ksft_status() +{ + local ksft_status=$1; shift + local msg=$1; shift + + RET=$(ksft_status_merge $RET $ksft_status) + if (( $? )); then + retmsg=$msg + fi +} + +log_test_result() +{ + local test_name=$1; shift + local opt_str=$1; shift + local result=$1; shift + local retmsg=$1; shift + + printf "TEST: %-60s [%s]\n" "$test_name $opt_str" "$result" + if [[ $retmsg ]]; then + printf "\t%s\n" "$retmsg" + fi +} + +pause_on_fail() +{ + if [[ $PAUSE_ON_FAIL == yes ]]; then + echo "Hit enter to continue, 'q' to quit" + read a + [[ $a == q ]] && exit 1 + fi +} + +handle_test_result_pass() +{ + local test_name=$1; shift + local opt_str=$1; shift + + log_test_result "$test_name" "$opt_str" " OK " +} + +handle_test_result_fail() +{ + local test_name=$1; shift + local opt_str=$1; shift + + log_test_result "$test_name" "$opt_str" FAIL "$retmsg" + pause_on_fail +} + +handle_test_result_xfail() +{ + local test_name=$1; shift + local opt_str=$1; shift + + log_test_result "$test_name" "$opt_str" XFAIL "$retmsg" + pause_on_fail +} + +handle_test_result_skip() +{ + local test_name=$1; shift + local opt_str=$1; shift + + log_test_result "$test_name" "$opt_str" SKIP "$retmsg" +} + +log_test() +{ + local test_name=$1 + local opt_str=$2 + + if [[ $# -eq 2 ]]; then + opt_str="($opt_str)" + fi + + if ((RET == ksft_pass)); then + handle_test_result_pass "$test_name" "$opt_str" + elif ((RET == ksft_xfail)); then + handle_test_result_xfail "$test_name" "$opt_str" + elif ((RET == ksft_skip)); then + handle_test_result_skip "$test_name" "$opt_str" + else + handle_test_result_fail "$test_name" "$opt_str" + fi + + EXIT_STATUS=$(ksft_exit_status_merge $EXIT_STATUS $RET) + return $RET +} + +log_test_skip() +{ + RET=$ksft_skip retmsg= log_test "$@" +} + +log_test_xfail() +{ + RET=$ksft_xfail retmsg= log_test "$@" +} + +log_info() +{ + local msg=$1 + + echo "INFO: $msg" +} -- 2.45.0

8 months, 1 week

2
2
0 0

[PATCH net-next v3 0/3] selftests: Add selftest for link layer and performance testing

by Mohan Prasad J

The series of patches are for doing basic tests of NIC driver. Test comprises checks for auto-negotiation, speed, duplex state and throughput between local NIC and partner. Tools such as ethtool, iperf3 are used. Signed-off-by: Mohan Prasad J <mohan.prasad(a)microchip.com> --- Changes in v3: - LinkConfig class is included in the hw library. This contains generic APIs for doing link layer operations. - Auto-negotiation checks involve changing the auto-neg state both in local and partner NIC. - Link layer test and performance test are separated to different selftest files. - Resetting of NIC driver done after test completion. Changes in v2: - Changed the hardcoded implementation of speed, duplex states, throughput to generic values, in order to support all type of NIC drivers. - Test executes based on the supported link modes between local NIC driver and partner. - Instead of lan743x directory, selftest file is now relocated to /selftests/drivers/net/hw. --- Mohan Prasad J (3): selftests: nic_link_layer: Add link layer selftest for NIC driver selftests: nic_link_layer: Add selftest case for speed and duplex states selftests: nic_performance: Add selftest for performance of NIC driver .../testing/selftests/drivers/net/hw/Makefile | 2 + .../drivers/net/hw/lib/py/__init__.py | 1 + .../drivers/net/hw/lib/py/linkconfig.py | 220 ++++++++++++++++++ .../drivers/net/hw/nic_link_layer.py | 105 +++++++++ .../drivers/net/hw/nic_performance.py | 121 ++++++++++ 5 files changed, 449 insertions(+) create mode 100644 tools/testing/selftests/drivers/net/hw/lib/py/linkconfig.py create mode 100644 tools/testing/selftests/drivers/net/hw/nic_link_layer.py create mode 100644 tools/testing/selftests/drivers/net/hw/nic_performance.py -- 2.43.0

8 months, 1 week

3
7
0 0

[PATCH] Add Selftest to test fork() syscall

by Shivam Chaudhary

This test verifies the correct behavior of the fork() system call, which creates a child process by duplicating the parent process. The test checks the following: - The child PID returned by fork() is present in /proc. - The child PID is different from the parent PID. - The memory allocated to a variable in the child process is independent of the parent process. Test logs : - Run without root TAP version 13 1..1 ok 1 # SKIP This test needs root to run! - Run with root TAP version 13 1..1 # Inside the parent process. # Child PID got from fork() return : 56038 # Parent PID from getpid(): 56037 # Inside the child process. 1..2 ok 1 Child Pid from /proc and fork() matching ok 2 Child Pid != Parent pid 1..3 ok 3 After modification in child No effect on the value of 'var' in parent # Totals: pass:3 fail:0 xfail:0 xpass:0 skip:0 error:0 Signed-off-by: Shivam Chaudhary <cvam0000(a)gmail.com> --- Here is my proposal for a new directory, /syscalls, to add syscall selftests, as there is currently no dedicated space for these tests. I encountered this issue while writing the test case for the delete_module syscall and was unsure where to place it. As a heads-up, the delete_module test is currently under review, and I would like to add it to this directory. tools/testing/selftests/Makefile | 1 + tools/testing/selftests/syscalls/.gitignore | 1 + .../syscalls/fork_syscall/.gitignore | 1 + .../selftests/syscalls/fork_syscall/Makefile | 5 + .../syscalls/fork_syscall/fork_syscall.c | 151 ++++++++++++++++++ 5 files changed, 159 insertions(+) create mode 100644 tools/testing/selftests/syscalls/.gitignore create mode 100644 tools/testing/selftests/syscalls/fork_syscall/.gitignore create mode 100644 tools/testing/selftests/syscalls/fork_syscall/Makefile create mode 100644 tools/testing/selftests/syscalls/fork_syscall/fork_syscall.c diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index 363d031a16f7..9265c17c5de3 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -97,6 +97,7 @@ TARGETS += sparc64 TARGETS += splice TARGETS += static_keys TARGETS += sync +TARGETS += syscalls/fork_syscall TARGETS += syscall_user_dispatch TARGETS += sysctl TARGETS += tc-testing diff --git a/tools/testing/selftests/syscalls/.gitignore b/tools/testing/selftests/syscalls/.gitignore new file mode 100644 index 000000000000..c7ae138d3f0c --- /dev/null +++ b/tools/testing/selftests/syscalls/.gitignore @@ -0,0 +1 @@ +// SPDX-License-Identifier: GPL-2.0 \ No newline at end of file diff --git a/tools/testing/selftests/syscalls/fork_syscall/.gitignore b/tools/testing/selftests/syscalls/fork_syscall/.gitignore new file mode 100644 index 000000000000..788cc1ff70bd --- /dev/null +++ b/tools/testing/selftests/syscalls/fork_syscall/.gitignore @@ -0,0 +1 @@ +# SPDX-License-Identifier: GPL-2.0-only \ No newline at end of file diff --git a/tools/testing/selftests/syscalls/fork_syscall/Makefile b/tools/testing/selftests/syscalls/fork_syscall/Makefile new file mode 100644 index 000000000000..56033a3d5a87 --- /dev/null +++ b/tools/testing/selftests/syscalls/fork_syscall/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 +TEST_GEN_PROGS := fork_syscall +CFLAGS += -Wall + +include ../lib.mk \ No newline at end of file diff --git a/tools/testing/selftests/syscalls/fork_syscall/fork_syscall.c b/tools/testing/selftests/syscalls/fork_syscall/fork_syscall.c new file mode 100644 index 000000000000..eab22831f7e1 --- /dev/null +++ b/tools/testing/selftests/syscalls/fork_syscall/fork_syscall.c @@ -0,0 +1,151 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* kselftest for fork() system call + * + * Summery : fork() system call is used to create a new process + * by duplicating an existing one. The new process, known as the + * child process, is a copy of the parent process. + * + * Child process is dublicate process but has different PID and + * memory allocation. + * + * About the test : With this test we are testing the following: + * - Child PID which fork() returns to Parent is present in /proc + * - Child PID is not same as Parent PID. + * - Memory allocation to a variable in child and parent process + * is different. +*/ + + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <dirent.h> +#include <ctype.h> + +#include "../../kselftest.h" + +// Function to check if a string is numeric (PID check) +int is_numeric(const char *str) { + while (*str) { + if (!isdigit(*str)) return 0; + str++; + } + return 1; +} + +// Function to find the child PID in /proc +pid_t find_child_pid(pid_t parent_pid) { + DIR *proc_dir = opendir("/proc"); + struct dirent *entry; + + if (proc_dir == NULL) { + perror("Failed to open /proc directory"); + ksft_exit_fail(); + return 1; + } + + // Iterate through the /proc directory to find PIDs + while ((entry = readdir(proc_dir)) != NULL) { + // Check if the entry is a PID + if (is_numeric(entry->d_name)) { + pid_t pid = atoi(entry->d_name); + + // Construct the path to /proc/<pid>/ + //stat to check the parent PID + + char path[40], buffer[100]; + snprintf(path, 40, "/proc/%d/stat", pid); + + FILE *stat_file = fopen(path, "r"); + if (stat_file != NULL) { + fgets(buffer, 100, stat_file); + fclose(stat_file); + + // The fourth field in /proc/<pid>/stat is the parent PID + pid_t ppid; + sscanf(buffer, "%*d %*s %*c %d", &ppid); + + if (ppid == parent_pid) { + closedir(proc_dir); + // Return the child PID if the parent PID matches + return pid; + } + } + } + } + + closedir(proc_dir); + + // Return -1 if no child PID was found + return -1; +} + +int main(void) { + + // Setting up kselftest framework + ksft_print_header(); + ksft_set_plan(1); + + // Check if test is run a root + if (geteuid()) { + ksft_test_result_skip("This test needs root to run!\n"); + return 1; + } + + // forking + pid_t pid = fork(); + + // Declare a variable in both parent and child processes + int var = 17; + + if (pid == -1) { + ksft_test_result_error("%s.\n", strerror(errno)); + ksft_finished(); + return 1; + + } else if (pid == 0) { + // This is the child process + ksft_print_msg("Inside the child process.\n"); + var = 1998; + + } else { + // This is the parent process + pid_t ppid=getpid(); + ksft_print_msg("Inside the parent process.\n"); + ksft_print_msg("Child PID got from fork() return : %d\n", pid); + ksft_print_msg("Parent PID from getpid(): %d\n",ppid); + + // Find the child PID in /proc + pid_t child_pid = find_child_pid(getpid()); + if (child_pid != -1) { + ksft_set_plan(2); + if(child_pid == pid && pid != ppid && var != 1998) { + ksft_test_result_pass("Child Pid from /proc and fork() matching\n"); + ksft_test_result_pass("Child Pid != Parent pid\n"); + ksft_set_plan(3); + ksft_test_result_pass( + "After modification in child No effect on the value of 'var' in parent\n"); + ksft_exit_pass(); + return 0; + } + else { + ksft_exit_fail(); + return 1; + } + } + else { + ksft_test_result_fail("Child Pid from /proc and fork() does not match"); + ksft_exit_fail(); + return 1; + } + + // Wait for the child process to finish + wait(NULL); + } + + return 0; +} + -- 2.34.1

8 months, 1 week

2
3
0 0

selftests/sched_ext: enq_last_no_enq_fails testcase fails

by Vishal Chourasia

Hi, ===== START ===== TEST: enq_last_no_enq_fails DESCRIPTION: Verify we fail to load a scheduler if we specify the SCX_OPS_ENQ_LAST flag without defining ops.enqueue() OUTPUT: ERR: enq_last_no_enq_fails.c:35 Incorrectly succeeded in to attaching scheduler not ok 2 enq_last_no_enq_fails # ===== END ===== Above selftest fails even when BPF scheduler is not loaded into the kernel. Below is snippet from the dmesg verifing bpf program was not loaded: sched_ext: enq_last_no_enq_fails: SCX_OPS_ENQ_LAST requires ops.enqueue() to be implemented scx_ops_enable.isra.0+0xde8/0xe30 bpf_struct_ops_link_create+0x1ac/0x240 link_create+0x178/0x400 __sys_bpf+0x7ac/0xd50 sys_bpf+0x2c/0x70 system_call_exception+0x148/0x310 system_call_vectored_common+0x15c/0x2ec sched_ext: "enq_select_cpu_fails" does not implement cgroup cpu.weight sched_ext: BPF scheduler "enq_select_cpu_fails" enabled sched_ext: BPF scheduler "enq_select_cpu_fails" disabled (runtime error) static int scx_ops_enable(struct sched_ext_ops *ops, struct bpf_link *link) { ... ret = validate_ops(ops); if (ret) goto err_disable; ... err_disable: mutex_unlock(&scx_ops_enable_mutex); /* * Returning an error code here would not pass all the error information * to userspace. Record errno using scx_ops_error() for cases * scx_ops_error() wasn't already invoked and exit indicating success so * that the error is notified through ops.exit() with all the details. * * Flush scx_ops_disable_work to ensure that error is reported before * init completion. */ scx_ops_error("scx_ops_enable() failed (%d)", ret); kthread_flush_work(&scx_ops_disable_work); return 0; } validate_ops() correctly reports the error, but err_disable path ultimately returns with a value of zero from: enq_last_no_enq_fails.c static enum scx_test_status run(void *ctx) { struct enq_last_no_enq_fails *skel = ctx; struct bpf_link *link; link = bpf_map__attach_struct_ops(skel->maps.enq_last_no_enq_fails_ops); if (link) { SCX_ERR("Incorrectly succeeded in to attaching scheduler"); return SCX_TEST_FAIL; } bpf_link__destroy(link); return SCX_TEST_PASS; }

8 months, 1 week

2
1
0 0

[PATCH v2 1/2] selftest: rtc: Add to check rtc alarm status for alarm related test

by Joseph Jang

In alarm_wkalm_set and alarm_wkalm_set_minute test, they use different ioctl (RTC_ALM_SET/RTC_WKALM_SET) for alarm feature detection. They will skip testing if RTC_ALM_SET/RTC_WKALM_SET ioctl returns an EINVAL error code. This design may miss detecting real problems when the efi.set_wakeup_time() return errors and then RTC_ALM_SET/RTC_WKALM_SET ioctl returns an EINVAL error code with RTC_FEATURE_ALARM enabled. In order to make rtctest more explicit and robust, we propose to use RTC_PARAM_GET ioctl interface to check rtc alarm feature state before running alarm related tests. If the kernel does not support RTC_PARAM_GET ioctl interface, we will fallback to check the error number of (RTC_ALM_SET/RTC_WKALM_SET) ioctl call for alarm feature detection. Requires commit 101ca8d05913b ("rtc: efi: Enable SET/GET WAKEUP services as optional") Reviewed-by: Koba Ko <kobak(a)nvidia.com> Reviewed-by: Matthew R. Ochs <mochs(a)nvidia.com> Signed-off-by: Joseph Jang <jjang(a)nvidia.com> --- Changes in v2: - Changed to use $(top_srcdir) instead of hardcoding the path. tools/testing/selftests/rtc/Makefile | 2 +- tools/testing/selftests/rtc/rtctest.c | 64 +++++++++++++++++++++++++++ 2 files changed, 65 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/rtc/Makefile b/tools/testing/selftests/rtc/Makefile index 55198ecc04db..6e3a98fb24ba 100644 --- a/tools/testing/selftests/rtc/Makefile +++ b/tools/testing/selftests/rtc/Makefile @@ -1,5 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 -CFLAGS += -O3 -Wl,-no-as-needed -Wall +CFLAGS += -O3 -Wl,-no-as-needed -Wall -I$(top_srcdir)/usr/include LDLIBS += -lrt -lpthread -lm TEST_GEN_PROGS = rtctest diff --git a/tools/testing/selftests/rtc/rtctest.c b/tools/testing/selftests/rtc/rtctest.c index 63ce02d1d5cc..2b12497eb30d 100644 --- a/tools/testing/selftests/rtc/rtctest.c +++ b/tools/testing/selftests/rtc/rtctest.c @@ -25,6 +25,12 @@ static char *rtc_file = "/dev/rtc0"; +enum rtc_alarm_state { + RTC_ALARM_UNKNOWN, + RTC_ALARM_ENABLED, + RTC_ALARM_DISABLED, +}; + FIXTURE(rtc) { int fd; }; @@ -82,6 +88,24 @@ static void nanosleep_with_retries(long ns) } } +static enum rtc_alarm_state get_rtc_alarm_state(int fd) +{ + struct rtc_param param = { 0 }; + int rc; + + /* Validate kernel reflects unsupported RTC alarm state */ + param.param = RTC_PARAM_FEATURES; + param.index = 0; + rc = ioctl(fd, RTC_PARAM_GET, &param); + if (rc < 0) + return RTC_ALARM_UNKNOWN; + + if ((param.uvalue & _BITUL(RTC_FEATURE_ALARM)) == 0) + return RTC_ALARM_DISABLED; + + return RTC_ALARM_ENABLED; +} + TEST_F_TIMEOUT(rtc, date_read_loop, READ_LOOP_DURATION_SEC + 2) { int rc; long iter_count = 0; @@ -197,11 +221,16 @@ TEST_F(rtc, alarm_alm_set) { fd_set readfds; time_t secs, new; int rc; + enum rtc_alarm_state alarm_state = RTC_ALARM_UNKNOWN; if (self->fd == -1 && errno == ENOENT) SKIP(return, "Skipping test since %s does not exist", rtc_file); ASSERT_NE(-1, self->fd); + alarm_state = get_rtc_alarm_state(self->fd); + if (alarm_state == RTC_ALARM_DISABLED) + SKIP(return, "Skipping test since alarms are not supported."); + rc = ioctl(self->fd, RTC_RD_TIME, &tm); ASSERT_NE(-1, rc); @@ -210,6 +239,11 @@ TEST_F(rtc, alarm_alm_set) { rc = ioctl(self->fd, RTC_ALM_SET, &tm); if (rc == -1) { + /* + * Report error if rtc alarm was enabled. Fallback to check ioctl + * error number if rtc alarm state is unknown. + */ + ASSERT_EQ(RTC_ALARM_UNKNOWN, alarm_state); ASSERT_EQ(EINVAL, errno); TH_LOG("skip alarms are not supported."); return; @@ -255,11 +289,16 @@ TEST_F(rtc, alarm_wkalm_set) { fd_set readfds; time_t secs, new; int rc; + enum rtc_alarm_state alarm_state = RTC_ALARM_UNKNOWN; if (self->fd == -1 && errno == ENOENT) SKIP(return, "Skipping test since %s does not exist", rtc_file); ASSERT_NE(-1, self->fd); + alarm_state = get_rtc_alarm_state(self->fd); + if (alarm_state == RTC_ALARM_DISABLED) + SKIP(return, "Skipping test since alarms are not supported."); + rc = ioctl(self->fd, RTC_RD_TIME, &alarm.time); ASSERT_NE(-1, rc); @@ -270,6 +309,11 @@ TEST_F(rtc, alarm_wkalm_set) { rc = ioctl(self->fd, RTC_WKALM_SET, &alarm); if (rc == -1) { + /* + * Report error if rtc alarm was enabled. Fallback to check ioctl + * error number if rtc alarm state is unknown. + */ + ASSERT_EQ(RTC_ALARM_UNKNOWN, alarm_state); ASSERT_EQ(EINVAL, errno); TH_LOG("skip alarms are not supported."); return; @@ -307,11 +351,16 @@ TEST_F_TIMEOUT(rtc, alarm_alm_set_minute, 65) { fd_set readfds; time_t secs, new; int rc; + enum rtc_alarm_state alarm_state = RTC_ALARM_UNKNOWN; if (self->fd == -1 && errno == ENOENT) SKIP(return, "Skipping test since %s does not exist", rtc_file); ASSERT_NE(-1, self->fd); + alarm_state = get_rtc_alarm_state(self->fd); + if (alarm_state == RTC_ALARM_DISABLED) + SKIP(return, "Skipping test since alarms are not supported."); + rc = ioctl(self->fd, RTC_RD_TIME, &tm); ASSERT_NE(-1, rc); @@ -320,6 +369,11 @@ TEST_F_TIMEOUT(rtc, alarm_alm_set_minute, 65) { rc = ioctl(self->fd, RTC_ALM_SET, &tm); if (rc == -1) { + /* + * Report error if rtc alarm was enabled. Fallback to check ioctl + * error number if rtc alarm state is unknown. + */ + ASSERT_EQ(RTC_ALARM_UNKNOWN, alarm_state); ASSERT_EQ(EINVAL, errno); TH_LOG("skip alarms are not supported."); return; @@ -365,11 +419,16 @@ TEST_F_TIMEOUT(rtc, alarm_wkalm_set_minute, 65) { fd_set readfds; time_t secs, new; int rc; + enum rtc_alarm_state alarm_state = RTC_ALARM_UNKNOWN; if (self->fd == -1 && errno == ENOENT) SKIP(return, "Skipping test since %s does not exist", rtc_file); ASSERT_NE(-1, self->fd); + alarm_state = get_rtc_alarm_state(self->fd); + if (alarm_state == RTC_ALARM_DISABLED) + SKIP(return, "Skipping test since alarms are not supported."); + rc = ioctl(self->fd, RTC_RD_TIME, &alarm.time); ASSERT_NE(-1, rc); @@ -380,6 +439,11 @@ TEST_F_TIMEOUT(rtc, alarm_wkalm_set_minute, 65) { rc = ioctl(self->fd, RTC_WKALM_SET, &alarm); if (rc == -1) { + /* + * Report error if rtc alarm was enabled. Fallback to check ioctl + * error number if rtc alarm state is unknown. + */ + ASSERT_EQ(RTC_ALARM_UNKNOWN, alarm_state); ASSERT_EQ(EINVAL, errno); TH_LOG("skip alarms are not supported."); return; -- 2.34.1

8 months, 1 week

3
2
0 0

[PATCH] sched_ext: Fix function pointer type mismatches in BPF selftests

by Vishal Chourasia

Fix incompatible function pointer type warnings in sched_ext BPF selftests by explicitly casting the function pointers when initializing struct_ops. This addresses multiple -Wincompatible-function-pointer-types warnings from the clang compiler where function signatures didn't match exactly. The void * cast ensures the compiler accepts the function pointer assignment despite minor type differences in the parameters. --- .../selftests/sched_ext/create_dsq.bpf.c | 6 +- .../sched_ext/ddsp_bogus_dsq_fail.bpf.c | 4 +- .../sched_ext/ddsp_vtimelocal_fail.bpf.c | 4 +- .../selftests/sched_ext/dsp_local_on.bpf.c | 8 +-- .../sched_ext/enq_select_cpu_fails.bpf.c | 4 +- tools/testing/selftests/sched_ext/exit.bpf.c | 14 ++--- .../testing/selftests/sched_ext/hotplug.bpf.c | 8 +-- .../sched_ext/init_enable_count.bpf.c | 8 +-- .../testing/selftests/sched_ext/maximal.bpf.c | 58 +++++++++---------- .../selftests/sched_ext/maybe_null.bpf.c | 6 +- .../sched_ext/maybe_null_fail_dsp.bpf.c | 4 +- .../sched_ext/maybe_null_fail_yld.bpf.c | 4 +- .../selftests/sched_ext/prog_run.bpf.c | 2 +- .../selftests/sched_ext/select_cpu_dfl.bpf.c | 2 +- .../sched_ext/select_cpu_dfl_nodispatch.bpf.c | 6 +- .../sched_ext/select_cpu_dispatch.bpf.c | 2 +- .../select_cpu_dispatch_bad_dsq.bpf.c | 4 +- .../select_cpu_dispatch_dbl_dsp.bpf.c | 4 +- .../sched_ext/select_cpu_vtime.bpf.c | 12 ++-- 19 files changed, 80 insertions(+), 80 deletions(-) diff --git a/tools/testing/selftests/sched_ext/create_dsq.bpf.c b/tools/testing/selftests/sched_ext/create_dsq.bpf.c index 23f79ed343f02..2cfc4ffd60e28 100644 --- a/tools/testing/selftests/sched_ext/create_dsq.bpf.c +++ b/tools/testing/selftests/sched_ext/create_dsq.bpf.c @@ -51,8 +51,8 @@ s32 BPF_STRUCT_OPS_SLEEPABLE(create_dsq_init) SEC(".struct_ops.link") struct sched_ext_ops create_dsq_ops = { - .init_task = create_dsq_init_task, - .exit_task = create_dsq_exit_task, - .init = create_dsq_init, + .init_task = (void *) create_dsq_init_task, + .exit_task = (void *) create_dsq_exit_task, + .init = (void *) create_dsq_init, .name = "create_dsq", }; diff --git a/tools/testing/selftests/sched_ext/ddsp_bogus_dsq_fail.bpf.c b/tools/testing/selftests/sched_ext/ddsp_bogus_dsq_fail.bpf.c index e97ad41d354ad..37d9bf6fb7458 100644 --- a/tools/testing/selftests/sched_ext/ddsp_bogus_dsq_fail.bpf.c +++ b/tools/testing/selftests/sched_ext/ddsp_bogus_dsq_fail.bpf.c @@ -35,8 +35,8 @@ void BPF_STRUCT_OPS(ddsp_bogus_dsq_fail_exit, struct scx_exit_info *ei) SEC(".struct_ops.link") struct sched_ext_ops ddsp_bogus_dsq_fail_ops = { - .select_cpu = ddsp_bogus_dsq_fail_select_cpu, - .exit = ddsp_bogus_dsq_fail_exit, + .select_cpu = (void *) ddsp_bogus_dsq_fail_select_cpu, + .exit = (void *) ddsp_bogus_dsq_fail_exit, .name = "ddsp_bogus_dsq_fail", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/ddsp_vtimelocal_fail.bpf.c b/tools/testing/selftests/sched_ext/ddsp_vtimelocal_fail.bpf.c index dde7e7dafbfbc..dffc97d9cdf14 100644 --- a/tools/testing/selftests/sched_ext/ddsp_vtimelocal_fail.bpf.c +++ b/tools/testing/selftests/sched_ext/ddsp_vtimelocal_fail.bpf.c @@ -32,8 +32,8 @@ void BPF_STRUCT_OPS(ddsp_vtimelocal_fail_exit, struct scx_exit_info *ei) SEC(".struct_ops.link") struct sched_ext_ops ddsp_vtimelocal_fail_ops = { - .select_cpu = ddsp_vtimelocal_fail_select_cpu, - .exit = ddsp_vtimelocal_fail_exit, + .select_cpu = (void *) ddsp_vtimelocal_fail_select_cpu, + .exit = (void *) ddsp_vtimelocal_fail_exit, .name = "ddsp_vtimelocal_fail", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/dsp_local_on.bpf.c b/tools/testing/selftests/sched_ext/dsp_local_on.bpf.c index efb4672decb41..6a7db1502c29e 100644 --- a/tools/testing/selftests/sched_ext/dsp_local_on.bpf.c +++ b/tools/testing/selftests/sched_ext/dsp_local_on.bpf.c @@ -56,10 +56,10 @@ void BPF_STRUCT_OPS(dsp_local_on_exit, struct scx_exit_info *ei) SEC(".struct_ops.link") struct sched_ext_ops dsp_local_on_ops = { - .select_cpu = dsp_local_on_select_cpu, - .enqueue = dsp_local_on_enqueue, - .dispatch = dsp_local_on_dispatch, - .exit = dsp_local_on_exit, + .select_cpu = (void *) dsp_local_on_select_cpu, + .enqueue = (void *) dsp_local_on_enqueue, + .dispatch = (void *) dsp_local_on_dispatch, + .exit = (void *) dsp_local_on_exit, .name = "dsp_local_on", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/enq_select_cpu_fails.bpf.c b/tools/testing/selftests/sched_ext/enq_select_cpu_fails.bpf.c index b3dfc1033cd6a..1efb50d61040a 100644 --- a/tools/testing/selftests/sched_ext/enq_select_cpu_fails.bpf.c +++ b/tools/testing/selftests/sched_ext/enq_select_cpu_fails.bpf.c @@ -36,8 +36,8 @@ void BPF_STRUCT_OPS(enq_select_cpu_fails_enqueue, struct task_struct *p, SEC(".struct_ops.link") struct sched_ext_ops enq_select_cpu_fails_ops = { - .select_cpu = enq_select_cpu_fails_select_cpu, - .enqueue = enq_select_cpu_fails_enqueue, + .select_cpu = (void *) enq_select_cpu_fails_select_cpu, + .enqueue = (void *) enq_select_cpu_fails_enqueue, .name = "enq_select_cpu_fails", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/exit.bpf.c b/tools/testing/selftests/sched_ext/exit.bpf.c index ae12ddaac921b..bf79ccd55f8f0 100644 --- a/tools/testing/selftests/sched_ext/exit.bpf.c +++ b/tools/testing/selftests/sched_ext/exit.bpf.c @@ -72,13 +72,13 @@ s32 BPF_STRUCT_OPS_SLEEPABLE(exit_init) SEC(".struct_ops.link") struct sched_ext_ops exit_ops = { - .select_cpu = exit_select_cpu, - .enqueue = exit_enqueue, - .dispatch = exit_dispatch, - .init_task = exit_init_task, - .enable = exit_enable, - .exit = exit_exit, - .init = exit_init, + .select_cpu = (void *) exit_select_cpu, + .enqueue = (void *) exit_enqueue, + .dispatch = (void *) exit_dispatch, + .init_task = (void *) exit_init_task, + .enable = (void *) exit_enable, + .exit = (void *) exit_exit, + .init = (void *) exit_init, .name = "exit", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/hotplug.bpf.c b/tools/testing/selftests/sched_ext/hotplug.bpf.c index 8f2601db39f37..6c9f25c9bf53e 100644 --- a/tools/testing/selftests/sched_ext/hotplug.bpf.c +++ b/tools/testing/selftests/sched_ext/hotplug.bpf.c @@ -46,16 +46,16 @@ void BPF_STRUCT_OPS_SLEEPABLE(hotplug_cpu_offline, s32 cpu) SEC(".struct_ops.link") struct sched_ext_ops hotplug_cb_ops = { - .cpu_online = hotplug_cpu_online, - .cpu_offline = hotplug_cpu_offline, - .exit = hotplug_exit, + .cpu_online = (void *) hotplug_cpu_online, + .cpu_offline = (void *) hotplug_cpu_offline, + .exit = (void *) hotplug_exit, .name = "hotplug_cbs", .timeout_ms = 1000U, }; SEC(".struct_ops.link") struct sched_ext_ops hotplug_nocb_ops = { - .exit = hotplug_exit, + .exit = (void *) hotplug_exit, .name = "hotplug_nocbs", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/init_enable_count.bpf.c b/tools/testing/selftests/sched_ext/init_enable_count.bpf.c index 47ea89a626c37..5eb9edb1837dc 100644 --- a/tools/testing/selftests/sched_ext/init_enable_count.bpf.c +++ b/tools/testing/selftests/sched_ext/init_enable_count.bpf.c @@ -45,9 +45,9 @@ void BPF_STRUCT_OPS(cnt_disable, struct task_struct *p) SEC(".struct_ops.link") struct sched_ext_ops init_enable_count_ops = { - .init_task = cnt_init_task, - .exit_task = cnt_exit_task, - .enable = cnt_enable, - .disable = cnt_disable, + .init_task = (void *) cnt_init_task, + .exit_task = (void *) cnt_exit_task, + .enable = (void *) cnt_enable, + .disable = (void *) cnt_disable, .name = "init_enable_count", }; diff --git a/tools/testing/selftests/sched_ext/maximal.bpf.c b/tools/testing/selftests/sched_ext/maximal.bpf.c index 00bfa9cb95d38..4d4cd8d966dba 100644 --- a/tools/testing/selftests/sched_ext/maximal.bpf.c +++ b/tools/testing/selftests/sched_ext/maximal.bpf.c @@ -131,34 +131,34 @@ void BPF_STRUCT_OPS(maximal_exit, struct scx_exit_info *info) SEC(".struct_ops.link") struct sched_ext_ops maximal_ops = { - .select_cpu = maximal_select_cpu, - .enqueue = maximal_enqueue, - .dequeue = maximal_dequeue, - .dispatch = maximal_dispatch, - .runnable = maximal_runnable, - .running = maximal_running, - .stopping = maximal_stopping, - .quiescent = maximal_quiescent, - .yield = maximal_yield, - .core_sched_before = maximal_core_sched_before, - .set_weight = maximal_set_weight, - .set_cpumask = maximal_set_cpumask, - .update_idle = maximal_update_idle, - .cpu_acquire = maximal_cpu_acquire, - .cpu_release = maximal_cpu_release, - .cpu_online = maximal_cpu_online, - .cpu_offline = maximal_cpu_offline, - .init_task = maximal_init_task, - .enable = maximal_enable, - .exit_task = maximal_exit_task, - .disable = maximal_disable, - .cgroup_init = maximal_cgroup_init, - .cgroup_exit = maximal_cgroup_exit, - .cgroup_prep_move = maximal_cgroup_prep_move, - .cgroup_move = maximal_cgroup_move, - .cgroup_cancel_move = maximal_cgroup_cancel_move, - .cgroup_set_weight = maximal_cgroup_set_weight, - .init = maximal_init, - .exit = maximal_exit, + .select_cpu = (void *) maximal_select_cpu, + .enqueue = (void *) maximal_enqueue, + .dequeue = (void *) maximal_dequeue, + .dispatch = (void *) maximal_dispatch, + .runnable = (void *) maximal_runnable, + .running = (void *) maximal_running, + .stopping = (void *) maximal_stopping, + .quiescent = (void *) maximal_quiescent, + .yield = (void *) maximal_yield, + .core_sched_before = (void *) maximal_core_sched_before, + .set_weight = (void *) maximal_set_weight, + .set_cpumask = (void *) maximal_set_cpumask, + .update_idle = (void *) maximal_update_idle, + .cpu_acquire = (void *) maximal_cpu_acquire, + .cpu_release = (void *) maximal_cpu_release, + .cpu_online = (void *) maximal_cpu_online, + .cpu_offline = (void *) maximal_cpu_offline, + .init_task = (void *) maximal_init_task, + .enable = (void *) maximal_enable, + .exit_task = (void *) maximal_exit_task, + .disable = (void *) maximal_disable, + .cgroup_init = (void *) maximal_cgroup_init, + .cgroup_exit = (void *) maximal_cgroup_exit, + .cgroup_prep_move = (void *) maximal_cgroup_prep_move, + .cgroup_move = (void *) maximal_cgroup_move, + .cgroup_cancel_move = (void *) maximal_cgroup_cancel_move, + .cgroup_set_weight = (void *) maximal_cgroup_set_weight, + .init = (void *) maximal_init, + .exit = (void *) maximal_exit, .name = "maximal", }; diff --git a/tools/testing/selftests/sched_ext/maybe_null.bpf.c b/tools/testing/selftests/sched_ext/maybe_null.bpf.c index 27d0f386acfb1..cf4ae870cd4e5 100644 --- a/tools/testing/selftests/sched_ext/maybe_null.bpf.c +++ b/tools/testing/selftests/sched_ext/maybe_null.bpf.c @@ -29,8 +29,8 @@ bool BPF_STRUCT_OPS(maybe_null_success_yield, struct task_struct *from, SEC(".struct_ops.link") struct sched_ext_ops maybe_null_success = { - .dispatch = maybe_null_success_dispatch, - .yield = maybe_null_success_yield, - .enable = maybe_null_running, + .dispatch = (void *) maybe_null_success_dispatch, + .yield = (void *) maybe_null_success_yield, + .enable = (void *) maybe_null_running, .name = "minimal", }; diff --git a/tools/testing/selftests/sched_ext/maybe_null_fail_dsp.bpf.c b/tools/testing/selftests/sched_ext/maybe_null_fail_dsp.bpf.c index c0641050271d3..ec724d7b33d18 100644 --- a/tools/testing/selftests/sched_ext/maybe_null_fail_dsp.bpf.c +++ b/tools/testing/selftests/sched_ext/maybe_null_fail_dsp.bpf.c @@ -19,7 +19,7 @@ void BPF_STRUCT_OPS(maybe_null_fail_dispatch, s32 cpu, struct task_struct *p) SEC(".struct_ops.link") struct sched_ext_ops maybe_null_fail = { - .dispatch = maybe_null_fail_dispatch, - .enable = maybe_null_running, + .dispatch = (void *) maybe_null_fail_dispatch, + .enable = (void *) maybe_null_running, .name = "maybe_null_fail_dispatch", }; diff --git a/tools/testing/selftests/sched_ext/maybe_null_fail_yld.bpf.c b/tools/testing/selftests/sched_ext/maybe_null_fail_yld.bpf.c index 3c1740028e3b9..e6552cace020e 100644 --- a/tools/testing/selftests/sched_ext/maybe_null_fail_yld.bpf.c +++ b/tools/testing/selftests/sched_ext/maybe_null_fail_yld.bpf.c @@ -22,7 +22,7 @@ bool BPF_STRUCT_OPS(maybe_null_fail_yield, struct task_struct *from, SEC(".struct_ops.link") struct sched_ext_ops maybe_null_fail = { - .yield = maybe_null_fail_yield, - .enable = maybe_null_running, + .yield = (void *) maybe_null_fail_yield, + .enable = (void *) maybe_null_running, .name = "maybe_null_fail_yield", }; diff --git a/tools/testing/selftests/sched_ext/prog_run.bpf.c b/tools/testing/selftests/sched_ext/prog_run.bpf.c index 6a4d7c48e3f22..00c267626a68f 100644 --- a/tools/testing/selftests/sched_ext/prog_run.bpf.c +++ b/tools/testing/selftests/sched_ext/prog_run.bpf.c @@ -28,6 +28,6 @@ void BPF_STRUCT_OPS(prog_run_exit, struct scx_exit_info *ei) SEC(".struct_ops.link") struct sched_ext_ops prog_run_ops = { - .exit = prog_run_exit, + .exit = (void *) prog_run_exit, .name = "prog_run", }; diff --git a/tools/testing/selftests/sched_ext/select_cpu_dfl.bpf.c b/tools/testing/selftests/sched_ext/select_cpu_dfl.bpf.c index 2ed2991afafe3..f171ac4709706 100644 --- a/tools/testing/selftests/sched_ext/select_cpu_dfl.bpf.c +++ b/tools/testing/selftests/sched_ext/select_cpu_dfl.bpf.c @@ -35,6 +35,6 @@ void BPF_STRUCT_OPS(select_cpu_dfl_enqueue, struct task_struct *p, SEC(".struct_ops.link") struct sched_ext_ops select_cpu_dfl_ops = { - .enqueue = select_cpu_dfl_enqueue, + .enqueue = (void *) select_cpu_dfl_enqueue, .name = "select_cpu_dfl", }; diff --git a/tools/testing/selftests/sched_ext/select_cpu_dfl_nodispatch.bpf.c b/tools/testing/selftests/sched_ext/select_cpu_dfl_nodispatch.bpf.c index 4bb5abb2d3690..9efdbb7da9288 100644 --- a/tools/testing/selftests/sched_ext/select_cpu_dfl_nodispatch.bpf.c +++ b/tools/testing/selftests/sched_ext/select_cpu_dfl_nodispatch.bpf.c @@ -82,8 +82,8 @@ s32 BPF_STRUCT_OPS(select_cpu_dfl_nodispatch_init_task, SEC(".struct_ops.link") struct sched_ext_ops select_cpu_dfl_nodispatch_ops = { - .select_cpu = select_cpu_dfl_nodispatch_select_cpu, - .enqueue = select_cpu_dfl_nodispatch_enqueue, - .init_task = select_cpu_dfl_nodispatch_init_task, + .select_cpu = (void *) select_cpu_dfl_nodispatch_select_cpu, + .enqueue = (void *) select_cpu_dfl_nodispatch_enqueue, + .init_task = (void *) select_cpu_dfl_nodispatch_init_task, .name = "select_cpu_dfl_nodispatch", }; diff --git a/tools/testing/selftests/sched_ext/select_cpu_dispatch.bpf.c b/tools/testing/selftests/sched_ext/select_cpu_dispatch.bpf.c index f0b96a4a04b2c..59bfc4f36167a 100644 --- a/tools/testing/selftests/sched_ext/select_cpu_dispatch.bpf.c +++ b/tools/testing/selftests/sched_ext/select_cpu_dispatch.bpf.c @@ -35,7 +35,7 @@ s32 BPF_STRUCT_OPS(select_cpu_dispatch_select_cpu, struct task_struct *p, SEC(".struct_ops.link") struct sched_ext_ops select_cpu_dispatch_ops = { - .select_cpu = select_cpu_dispatch_select_cpu, + .select_cpu = (void *) select_cpu_dispatch_select_cpu, .name = "select_cpu_dispatch", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/select_cpu_dispatch_bad_dsq.bpf.c b/tools/testing/selftests/sched_ext/select_cpu_dispatch_bad_dsq.bpf.c index 7b42ddce0f56c..3bbd5fcdfb18e 100644 --- a/tools/testing/selftests/sched_ext/select_cpu_dispatch_bad_dsq.bpf.c +++ b/tools/testing/selftests/sched_ext/select_cpu_dispatch_bad_dsq.bpf.c @@ -30,8 +30,8 @@ void BPF_STRUCT_OPS(select_cpu_dispatch_bad_dsq_exit, struct scx_exit_info *ei) SEC(".struct_ops.link") struct sched_ext_ops select_cpu_dispatch_bad_dsq_ops = { - .select_cpu = select_cpu_dispatch_bad_dsq_select_cpu, - .exit = select_cpu_dispatch_bad_dsq_exit, + .select_cpu = (void *) select_cpu_dispatch_bad_dsq_select_cpu, + .exit = (void *) select_cpu_dispatch_bad_dsq_exit, .name = "select_cpu_dispatch_bad_dsq", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/select_cpu_dispatch_dbl_dsp.bpf.c b/tools/testing/selftests/sched_ext/select_cpu_dispatch_dbl_dsp.bpf.c index 653e3dc0b4dc8..0fda57fe0ecfa 100644 --- a/tools/testing/selftests/sched_ext/select_cpu_dispatch_dbl_dsp.bpf.c +++ b/tools/testing/selftests/sched_ext/select_cpu_dispatch_dbl_dsp.bpf.c @@ -31,8 +31,8 @@ void BPF_STRUCT_OPS(select_cpu_dispatch_dbl_dsp_exit, struct scx_exit_info *ei) SEC(".struct_ops.link") struct sched_ext_ops select_cpu_dispatch_dbl_dsp_ops = { - .select_cpu = select_cpu_dispatch_dbl_dsp_select_cpu, - .exit = select_cpu_dispatch_dbl_dsp_exit, + .select_cpu = (void *) select_cpu_dispatch_dbl_dsp_select_cpu, + .exit = (void *) select_cpu_dispatch_dbl_dsp_exit, .name = "select_cpu_dispatch_dbl_dsp", .timeout_ms = 1000U, }; diff --git a/tools/testing/selftests/sched_ext/select_cpu_vtime.bpf.c b/tools/testing/selftests/sched_ext/select_cpu_vtime.bpf.c index 7f3ebf4fc2ead..e6c67bcf5e6e3 100644 --- a/tools/testing/selftests/sched_ext/select_cpu_vtime.bpf.c +++ b/tools/testing/selftests/sched_ext/select_cpu_vtime.bpf.c @@ -81,12 +81,12 @@ s32 BPF_STRUCT_OPS_SLEEPABLE(select_cpu_vtime_init) SEC(".struct_ops.link") struct sched_ext_ops select_cpu_vtime_ops = { - .select_cpu = select_cpu_vtime_select_cpu, - .dispatch = select_cpu_vtime_dispatch, - .running = select_cpu_vtime_running, - .stopping = select_cpu_vtime_stopping, - .enable = select_cpu_vtime_enable, - .init = select_cpu_vtime_init, + .select_cpu = (void *) select_cpu_vtime_select_cpu, + .dispatch = (void *) select_cpu_vtime_dispatch, + .running = (void *) select_cpu_vtime_running, + .stopping = (void *) select_cpu_vtime_stopping, + .enable = (void *) select_cpu_vtime_enable, + .init = (void *) select_cpu_vtime_init, .name = "select_cpu_vtime", .timeout_ms = 1000U, }; -- 2.47.0

8 months, 1 week

2
1
0 0

[PATCH v1 0/2] mseal: fixing madvise for file-backed mapping and PROT_NONE

by jeffxu＠chromium.org

From: Jeff Xu <jeffxu(a)google.com> Two fixes for madvise(MADV_DONTNEED) when sealed. For PROT_NONE mappings, the previous blocking of madvise(MADV_DONTNEED) is unnecessary. As PROT_NONE already prohibits memory access, madvise(MADV_DONTNEED) should be allowed to proceed in order to free the page. For file-backed, private, read-only memory mappings, we previously did not block the madvise(MADV_DONTNEED). This was based on the assumption that the memory's content, being file-backed, could be retrieved from the file if accessed again. However, this assumption failed to consider scenarios where a mapping is initially created as read-write, modified, and subsequently changed to read-only. The newly introduced VM_WASWRITE flag addresses this oversight. Jeff Xu (2): mseal: Two fixes for madvise(MADV_DONTNEED) when sealed selftest/mseal: Add tests for madvise include/linux/mm.h | 2 + mm/mprotect.c | 3 + mm/mseal.c | 42 +++++++-- tools/testing/selftests/mm/mseal_test.c | 118 +++++++++++++++++++++++- 4 files changed, 157 insertions(+), 8 deletions(-) -- 2.47.0.rc1.288.g06298d1525-goog

8 months, 1 week

7
14
0 0

[PATCH V13 00/14] perf/core: Add ability for an event to "pause" or "resume" AUX area tracing

by Adrian Hunter

Hi Note for V12: There was a small conflict between the Intel PT changes in "KVM: x86: Fix Intel PT Host/Guest mode when host tracing" and the changes in this patch set, so I have put the patch sets together, along with outstanding fix "perf/x86/intel/pt: Fix buffer full but size is 0 case" Cover letter for KVM changes (patches 2 to 4): There is a long-standing problem whereby running Intel PT on host and guest in Host/Guest mode, causes VM-Entry failure. The motivation for this patch set is to provide a fix for stable kernels prior to the advent of the "Mediated Passthrough vPMU" patch set: https://lore.kernel.org/kvm/20240801045907.4010984-1-mizhang@google.com/ which would render a large part of the fix unnecessary but likely not be suitable for backport to stable due to its size and complexity. Ideally, this patch set would be applied before "Mediated Passthrough vPMU" Note that the fix does not conflict with "Mediated Passthrough vPMU", it is just that "Mediated Passthrough vPMU" will make the code to stop and restart Intel PT unnecessary. Note for V11: Moving aux_paused into a union within struct hw_perf_event caused a regression because aux_paused was being written unconditionally even though it is valid only for AUX (e.g. Intel PT) PMUs. That is fixed in V11. Hardware traces, such as instruction traces, can produce a vast amount of trace data, so being able to reduce tracing to more specific circumstances can be useful. The ability to pause or resume tracing when another event happens, can do that. These patches add such a facilty and show how it would work for Intel Processor Trace. Maintainers of other AUX area tracing implementations are requested to consider if this is something they might employ and then whether or not the ABI would work for them. Note, thank you to James Clark (ARM) for evaluating the API for Coresight. Suzuki K Poulose (ARM) also responded positively to the RFC. Changes to perf tools are now (since V4) fleshed out. Please note, Intel® Architecture Instruction Set Extensions and Future Features Programming Reference March 2024 319433-052, currently: https://cdrdv2.intel.com/v1/dl/getContent/671368 introduces hardware pause / resume for Intel PT in a feature named Intel PT Trigger Tracing. For that more fields in perf_event_attr will be necessary. The main differences are: - it can be applied not just to overflows, but optionally to every event - a packet is emitted into the trace, optionally with IP information - no PMI - works with PMC and DR (breakpoint) events only Here are the proposed additions to perf_event_attr, please comment: diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h index 0c557f0a17b3..05dcc43f11bb 100644 --- a/tools/include/uapi/linux/perf_event.h +++ b/tools/include/uapi/linux/perf_event.h @@ -369,6 +369,22 @@ enum perf_event_read_format { PERF_FORMAT_MAX = 1U << 5, /* non-ABI */ }; +enum { + PERF_AUX_ACTION_START_PAUSED = 1U << 0, + PERF_AUX_ACTION_PAUSE = 1U << 1, + PERF_AUX_ACTION_RESUME = 1U << 2, + PERF_AUX_ACTION_EMIT = 1U << 3, + PERF_AUX_ACTION_NR = 0x1f << 4, + PERF_AUX_ACTION_NO_IP = 1U << 9, + PERF_AUX_ACTION_PAUSE_ON_EVT = 1U << 10, + PERF_AUX_ACTION_RESUME_ON_EVT = 1U << 11, + PERF_AUX_ACTION_EMIT_ON_EVT = 1U << 12, + PERF_AUX_ACTION_NR_ON_EVT = 0x1f << 13, + PERF_AUX_ACTION_NO_IP_ON_EVT = 1U << 18, + PERF_AUX_ACTION_MASK = ~PERF_AUX_ACTION_START_PAUSED, + PERF_AUX_PAUSE_RESUME_MASK = PERF_AUX_ACTION_PAUSE | PERF_AUX_ACTION_RESUME, +}; + #define PERF_ATTR_SIZE_VER0 64 /* sizeof first published struct */ #define PERF_ATTR_SIZE_VER1 72 /* add: config2 */ #define PERF_ATTR_SIZE_VER2 80 /* add: branch_sample_type */ @@ -515,10 +531,19 @@ struct perf_event_attr { union { __u32 aux_action; struct { - __u32 aux_start_paused : 1, /* start AUX area tracing paused */ - aux_pause : 1, /* on overflow, pause AUX area tracing */ - aux_resume : 1, /* on overflow, resume AUX area tracing */ - __reserved_3 : 29; + __u32 aux_start_paused : 1, /* start AUX area tracing paused */ + aux_pause : 1, /* on overflow, pause AUX area tracing */ + aux_resume : 1, /* on overflow, resume AUX area tracing */ + aux_emit : 1, /* generate AUX records instead of events */ + aux_nr : 5, /* AUX area tracing reference number */ + aux_no_ip : 1, /* suppress IP in AUX records */ + /* Following apply to event occurrence not overflows */ + aux_pause_on_evt : 1, /* on event, pause AUX area tracing */ + aux_resume_on_evt : 1, /* on event, resume AUX area tracing */ + aux_emit_on_evt : 1, /* generate AUX records instead of events */ + aux_nr_on_evt : 5, /* AUX area tracing reference number */ + aux_no_ip_on_evt : 1, /* suppress IP in AUX records */ + __reserved_3 : 13; }; }; Changes in V13: perf/core: Add aux_pause, aux_resume, aux_start_paused Do aux_resume at the end of __perf_event_overflow() so as to trace less of perf itself perf tools: Add missing_features for aux_start_paused, aux_pause, aux_resume Add error message also in EOPNOTSUPP case (Leo) Changes in V12: Add previously sent patch "perf/x86/intel/pt: Fix buffer full but size is 0 case" Add previously sent patch set "KVM: x86: Fix Intel PT Host/Guest mode when host tracing" Rebase on current tip plus patch set "KVM: x86: Fix Intel PT Host/Guest mode when host tracing" Changes in V11: perf/core: Add aux_pause, aux_resume, aux_start_paused Make assignment to event->hw.aux_paused conditional on (pmu->capabilities & PERF_PMU_CAP_AUX_PAUSE). perf/x86/intel: Do not enable large PEBS for events with aux actions or aux sampling Remove definition of has_aux_action() because it has already been added as an inline function. perf/x86/intel/pt: Fix sampling synchronization perf tools: Enable evsel__is_aux_event() to work for ARM/ARM64 perf tools: Enable evsel__is_aux_event() to work for S390_CPUMSF Dropped because they have already been applied Changes in V10: perf/core: Add aux_pause, aux_resume, aux_start_paused Move aux_paused into a union within struct hw_perf_event. Additional comment wrt PERF_EF_PAUSE/PERF_EF_RESUME. Factor out has_aux_action() as an inline function. Use scoped_guard for irqsave. Move calls of perf_event_aux_pause() from __perf_event_output() to __perf_event_overflow(). Changes in V9: perf/x86/intel/pt: Fix sampling synchronization New patch perf/core: Add aux_pause, aux_resume, aux_start_paused Move aux_paused to struct hw_perf_event perf/x86/intel/pt: Add support for pause / resume Add more comments and barriers for resume_allowed and pause_allowed Always use WRITE_ONCE with resume_allowed Changes in V8: perf tools: Parse aux-action Fix clang warning: util/auxtrace.c:821:7: error: missing field 'aux_action' initializer [-Werror,-Wmissing-field-initializers] 821 | {NULL}, | ^ Changes in V7: Add Andi's Reviewed-by for patches 2-12 Re-base Changes in V6: perf/core: Add aux_pause, aux_resume, aux_start_paused Removed READ/WRITE_ONCE from __perf_event_aux_pause() Expanded comment about guarding against NMI Changes in V5: perf/core: Add aux_pause, aux_resume, aux_start_paused Added James' Ack perf/x86/intel: Do not enable large PEBS for events with aux actions or aux sampling New patch perf tools Added Ian's Ack Changes in V4: perf/core: Add aux_pause, aux_resume, aux_start_paused Rename aux_output_cfg -> aux_action Reorder aux_action bits from: aux_pause, aux_resume, aux_start_paused to: aux_start_paused, aux_pause, aux_resume Fix aux_action bits __u64 -> __u32 coresight: Have a stab at support for pause / resume Dropped perf tools All new patches Changes in RFC V3: coresight: Have a stab at support for pause / resume 'mode' -> 'flags' so it at least compiles Changes in RFC V2: Use ->stop() / ->start() instead of ->pause_resume() Move aux_start_paused bit into aux_output_cfg Tighten up when Intel PT pause / resume is allowed Add an example of how it might work for CoreSight Adrian Hunter (14): perf/x86/intel/pt: Fix buffer full but size is 0 case KVM: x86: Fix Intel PT IA32_RTIT_CTL MSR validation KVM: x86: Fix Intel PT Host/Guest mode when host tracing also KVM: selftests: Add guest Intel PT test perf/core: Add aux_pause, aux_resume, aux_start_paused perf/x86/intel/pt: Add support for pause / resume perf/x86/intel: Do not enable large PEBS for events with aux actions or aux sampling perf tools: Add aux_start_paused, aux_pause and aux_resume perf tools: Add aux-action config term perf tools: Parse aux-action perf tools: Add missing_features for aux_start_paused, aux_pause, aux_resume perf intel-pt: Improve man page format perf intel-pt: Add documentation for pause / resume perf intel-pt: Add a test for pause / resume arch/x86/events/intel/core.c | 4 +- arch/x86/events/intel/pt.c | 209 +++++++- arch/x86/events/intel/pt.h | 16 + arch/x86/include/asm/intel_pt.h | 4 + arch/x86/kvm/vmx/vmx.c | 26 +- arch/x86/kvm/vmx/vmx.h | 1 - include/linux/perf_event.h | 28 + include/uapi/linux/perf_event.h | 11 +- kernel/events/core.c | 75 ++- kernel/events/internal.h | 1 + tools/include/uapi/linux/perf_event.h | 11 +- tools/perf/Documentation/perf-intel-pt.txt | 596 +++++++++++++-------- tools/perf/Documentation/perf-record.txt | 4 + tools/perf/builtin-record.c | 4 +- tools/perf/tests/shell/test_intel_pt.sh | 28 + tools/perf/util/auxtrace.c | 67 ++- tools/perf/util/auxtrace.h | 6 +- tools/perf/util/evsel.c | 15 + tools/perf/util/evsel.h | 1 + tools/perf/util/evsel_config.h | 1 + tools/perf/util/parse-events.c | 10 + tools/perf/util/parse-events.h | 1 + tools/perf/util/parse-events.l | 1 + tools/perf/util/perf_event_attr_fprintf.c | 3 + tools/perf/util/pmu.c | 1 + tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/include/x86_64/processor.h | 1 + tools/testing/selftests/kvm/x86_64/intel_pt.c | 381 +++++++++++++ 28 files changed, 1243 insertions(+), 264 deletions(-) create mode 100644 tools/testing/selftests/kvm/x86_64/intel_pt.c Regards Adrian

8 months, 1 week

4
23
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[PATCH net-next v5 0/3] Threads support in proc connector

by Anjali Kulkarni

Recently we committed a fix to allow processes to receive notifications for non-zero exits via the process connector module. Commit is a4c9a56e6a2c. However, for threads, when it does a pthread_exit(&exit_status) call, the kernel is not aware of the exit status with which pthread_exit is called. It is sent by child thread to the parent process, if it is waiting in pthread_join(). Hence, for a thread exiting abnormally, kernel cannot send notifications to any listening processes. The exception to this is if the thread is sent a signal which it has not handled, and dies along with it's process as a result; for eg. SIGSEGV or SIGKILL. In this case, kernel is aware of the non-zero exit and sends a notification for it. For our use case, we cannot have parent wait in pthread_join, one of the main reasons for this being that we do not want to track normal pthread_exit(), which could be a very large number. We only want to be notified of any abnormal exits. Hence, threads are created with pthread_attr_t set to PTHREAD_CREATE_DETACHED. To fix this problem, we add a new type PROC_CN_MCAST_NOTIFY to proc connector API, which allows a thread to send it's exit status to kernel either when it needs to call pthread_exit() with non-zero value to indicate some error or from signal handler before pthread_exit(). We also need to filter packets with non-zero exit notifications futher based on instances, which can be identified by task names. Hence, added a comm field to the packet's struct proc_event, in which task->comm is stored. v4->v5 changes: - Handled comment by Stanislav Fomichev to fix a print format error. - Made thread.c completely automated by starting proc_filter program from within threads.c. - Changed name CONFIG_CN_HASH_KUNIT_TEST to CN_HASH_KUNIT_TEST in Kconfig.debug and changed display text. v3->v4 changes: - Reduce size of exit.log by removing unnecessary text. v2->v3 changes: - Handled comment by Liam Howlett to set hdev to NULL and add comment on it. - Handled comment by Liam Howlett to combine functions for deleting+get and deleting into one in cn_hash.c - Handled comment by Liam Howlett to remove extern in the functions defined in cn_hash_test.h - Some nits by Liam Howlett fixed. - Handled comment by Liam Howlett to make threads test automated. proc_filter.c creates exit.log, which is read by thread.c and checks the values reported. - Added "comm" field to struct proc_event, to copy the task's name to the packet to allow further filtering by packets. v1->v2 changes: - Handled comment by Peter Zijlstra to remove locking for PF_EXIT_NOTIFY task->flags. - Added error handling in thread.c v->v1 changes: - Handled comment by Simon Horman to remove unused err in cn_proc.c - Handled comment by Simon Horman to make adata and key_display static in cn_hash_test.c Anjali Kulkarni (3): connector/cn_proc: Add hash table for threads connector/cn_proc: Kunit tests for threads hash table connector/cn_proc: Selftest for threads drivers/connector/Makefile | 2 +- drivers/connector/cn_hash.c | 221 +++++++++++++++++ drivers/connector/cn_proc.c | 62 ++++- drivers/connector/connector.c | 75 +++++- include/linux/connector.h | 35 +++ include/linux/sched.h | 2 +- include/uapi/linux/cn_proc.h | 5 +- lib/Kconfig.debug | 17 ++ lib/Makefile | 1 + lib/cn_hash_test.c | 167 +++++++++++++ lib/cn_hash_test.h | 10 + tools/testing/selftests/connector/Makefile | 23 +- .../testing/selftests/connector/proc_filter.c | 34 ++- tools/testing/selftests/connector/thread.c | 232 ++++++++++++++++++ .../selftests/connector/thread_filter.c | 96 ++++++++ 15 files changed, 967 insertions(+), 15 deletions(-) create mode 100644 drivers/connector/cn_hash.c create mode 100644 lib/cn_hash_test.c create mode 100644 lib/cn_hash_test.h create mode 100644 tools/testing/selftests/connector/thread.c create mode 100644 tools/testing/selftests/connector/thread_filter.c -- 2.46.0

8 months, 1 week

4
20
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[PATCH AUTOSEL 6.6 03/23] selftests/bpf: Verify that sync_linked_regs preserves subreg_def

by Sasha Levin

From: Eduard Zingerman <eddyz87(a)gmail.com> [ Upstream commit a41b3828ec056a631ad22413d4560017fed5c3bd ] This test was added because of a bug in verifier.c:sync_linked_regs(), upon range propagation it destroyed subreg_def marks for registers. The test is written in a way to return an upper half of a register that is affected by range propagation and must have it's subreg_def preserved. This gives a return value of 0 and leads to undefined return value if subreg_def mark is not preserved. Signed-off-by: Eduard Zingerman <eddyz87(a)gmail.com> Signed-off-by: Andrii Nakryiko <andrii(a)kernel.org> Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Acked-by: Daniel Borkmann <daniel(a)iogearbox.net> Link: https://lore.kernel.org/bpf/20240924210844.1758441-2-eddyz87@gmail.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- .../selftests/bpf/progs/verifier_scalar_ids.c | 67 +++++++++++++++++++ 1 file changed, 67 insertions(+) diff --git a/tools/testing/selftests/bpf/progs/verifier_scalar_ids.c b/tools/testing/selftests/bpf/progs/verifier_scalar_ids.c index 13b29a7faa71a..d24d3a36ec144 100644 --- a/tools/testing/selftests/bpf/progs/verifier_scalar_ids.c +++ b/tools/testing/selftests/bpf/progs/verifier_scalar_ids.c @@ -656,4 +656,71 @@ __naked void two_old_ids_one_cur_id(void) : __clobber_all); } +SEC("socket") +/* Note the flag, see verifier.c:opt_subreg_zext_lo32_rnd_hi32() */ +__flag(BPF_F_TEST_RND_HI32) +__success +/* This test was added because of a bug in verifier.c:sync_linked_regs(), + * upon range propagation it destroyed subreg_def marks for registers. + * The subreg_def mark is used to decide whether zero extension instructions + * are needed when register is read. When BPF_F_TEST_RND_HI32 is set it + * also causes generation of statements to randomize upper halves of + * read registers. + * + * The test is written in a way to return an upper half of a register + * that is affected by range propagation and must have it's subreg_def + * preserved. This gives a return value of 0 and leads to undefined + * return value if subreg_def mark is not preserved. + */ +__retval(0) +/* Check that verifier believes r1/r0 are zero at exit */ +__log_level(2) +__msg("4: (77) r1 >>= 32 ; R1_w=0") +__msg("5: (bf) r0 = r1 ; R0_w=0 R1_w=0") +__msg("6: (95) exit") +__msg("from 3 to 4") +__msg("4: (77) r1 >>= 32 ; R1_w=0") +__msg("5: (bf) r0 = r1 ; R0_w=0 R1_w=0") +__msg("6: (95) exit") +/* Verify that statements to randomize upper half of r1 had not been + * generated. + */ +__xlated("call unknown") +__xlated("r0 &= 2147483647") +__xlated("w1 = w0") +/* This is how disasm.c prints BPF_ZEXT_REG at the moment, x86 and arm + * are the only CI archs that do not need zero extension for subregs. + */ +#if !defined(__TARGET_ARCH_x86) && !defined(__TARGET_ARCH_arm64) +__xlated("w1 = w1") +#endif +__xlated("if w0 < 0xa goto pc+0") +__xlated("r1 >>= 32") +__xlated("r0 = r1") +__xlated("exit") +__naked void linked_regs_and_subreg_def(void) +{ + asm volatile ( + "call %[bpf_ktime_get_ns];" + /* make sure r0 is in 32-bit range, otherwise w1 = w0 won't + * assign same IDs to registers. + */ + "r0 &= 0x7fffffff;" + /* link w1 and w0 via ID */ + "w1 = w0;" + /* 'if' statement propagates range info from w0 to w1, + * but should not affect w1->subreg_def property. + */ + "if w0 < 10 goto +0;" + /* r1 is read here, on archs that require subreg zero + * extension this would cause zext patch generation. + */ + "r1 >>= 32;" + "r0 = r1;" + "exit;" + : + : __imm(bpf_ktime_get_ns) + : __clobber_all); +} + char _license[] SEC("license") = "GPL"; -- 2.43.0

8 months, 1 week

1
0
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[PATCH AUTOSEL 6.11 20/30] selftests/bpf: Assert link info uprobe_multi count & path_size if unset

by Sasha Levin

From: Tyrone Wu <wudevelops(a)gmail.com> [ Upstream commit b836cbdf3b81a4a22b3452186efa2e5105a77e10 ] Add assertions in `bpf_link_info.uprobe_multi` test to verify that `count` and `path_size` fields are correctly populated when the fields are unset. This tests a previous bug where the `path_size` field was not populated when `path` and `path_size` were unset. Signed-off-by: Tyrone Wu <wudevelops(a)gmail.com> Signed-off-by: Andrii Nakryiko <andrii(a)kernel.org> Link: https://lore.kernel.org/bpf/20241011000803.681190-2-wudevelops@gmail.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/bpf/prog_tests/fill_link_info.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/tools/testing/selftests/bpf/prog_tests/fill_link_info.c b/tools/testing/selftests/bpf/prog_tests/fill_link_info.c index f3932941bbaaf..59ef57145b63c 100644 --- a/tools/testing/selftests/bpf/prog_tests/fill_link_info.c +++ b/tools/testing/selftests/bpf/prog_tests/fill_link_info.c @@ -417,6 +417,15 @@ verify_umulti_link_info(int fd, bool retprobe, __u64 *offsets, if (!ASSERT_NEQ(err, -1, "readlink")) return -1; + memset(&info, 0, sizeof(info)); + err = bpf_link_get_info_by_fd(fd, &info, &len); + if (!ASSERT_OK(err, "bpf_link_get_info_by_fd")) + return -1; + + ASSERT_EQ(info.uprobe_multi.count, 3, "info.uprobe_multi.count"); + ASSERT_EQ(info.uprobe_multi.path_size, strlen(path) + 1, + "info.uprobe_multi.path_size"); + for (bit = 0; bit < 8; bit++) { memset(&info, 0, sizeof(info)); info.uprobe_multi.path = ptr_to_u64(path_buf); -- 2.43.0

8 months, 1 week

1
0
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[PATCH AUTOSEL 6.11 03/30] selftests/bpf: Verify that sync_linked_regs preserves subreg_def

by Sasha Levin

From: Eduard Zingerman <eddyz87(a)gmail.com> [ Upstream commit a41b3828ec056a631ad22413d4560017fed5c3bd ] This test was added because of a bug in verifier.c:sync_linked_regs(), upon range propagation it destroyed subreg_def marks for registers. The test is written in a way to return an upper half of a register that is affected by range propagation and must have it's subreg_def preserved. This gives a return value of 0 and leads to undefined return value if subreg_def mark is not preserved. Signed-off-by: Eduard Zingerman <eddyz87(a)gmail.com> Signed-off-by: Andrii Nakryiko <andrii(a)kernel.org> Signed-off-by: Daniel Borkmann <daniel(a)iogearbox.net> Acked-by: Daniel Borkmann <daniel(a)iogearbox.net> Link: https://lore.kernel.org/bpf/20240924210844.1758441-2-eddyz87@gmail.com Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- .../selftests/bpf/progs/verifier_scalar_ids.c | 67 +++++++++++++++++++ 1 file changed, 67 insertions(+) diff --git a/tools/testing/selftests/bpf/progs/verifier_scalar_ids.c b/tools/testing/selftests/bpf/progs/verifier_scalar_ids.c index 13b29a7faa71a..d24d3a36ec144 100644 --- a/tools/testing/selftests/bpf/progs/verifier_scalar_ids.c +++ b/tools/testing/selftests/bpf/progs/verifier_scalar_ids.c @@ -656,4 +656,71 @@ __naked void two_old_ids_one_cur_id(void) : __clobber_all); } +SEC("socket") +/* Note the flag, see verifier.c:opt_subreg_zext_lo32_rnd_hi32() */ +__flag(BPF_F_TEST_RND_HI32) +__success +/* This test was added because of a bug in verifier.c:sync_linked_regs(), + * upon range propagation it destroyed subreg_def marks for registers. + * The subreg_def mark is used to decide whether zero extension instructions + * are needed when register is read. When BPF_F_TEST_RND_HI32 is set it + * also causes generation of statements to randomize upper halves of + * read registers. + * + * The test is written in a way to return an upper half of a register + * that is affected by range propagation and must have it's subreg_def + * preserved. This gives a return value of 0 and leads to undefined + * return value if subreg_def mark is not preserved. + */ +__retval(0) +/* Check that verifier believes r1/r0 are zero at exit */ +__log_level(2) +__msg("4: (77) r1 >>= 32 ; R1_w=0") +__msg("5: (bf) r0 = r1 ; R0_w=0 R1_w=0") +__msg("6: (95) exit") +__msg("from 3 to 4") +__msg("4: (77) r1 >>= 32 ; R1_w=0") +__msg("5: (bf) r0 = r1 ; R0_w=0 R1_w=0") +__msg("6: (95) exit") +/* Verify that statements to randomize upper half of r1 had not been + * generated. + */ +__xlated("call unknown") +__xlated("r0 &= 2147483647") +__xlated("w1 = w0") +/* This is how disasm.c prints BPF_ZEXT_REG at the moment, x86 and arm + * are the only CI archs that do not need zero extension for subregs. + */ +#if !defined(__TARGET_ARCH_x86) && !defined(__TARGET_ARCH_arm64) +__xlated("w1 = w1") +#endif +__xlated("if w0 < 0xa goto pc+0") +__xlated("r1 >>= 32") +__xlated("r0 = r1") +__xlated("exit") +__naked void linked_regs_and_subreg_def(void) +{ + asm volatile ( + "call %[bpf_ktime_get_ns];" + /* make sure r0 is in 32-bit range, otherwise w1 = w0 won't + * assign same IDs to registers. + */ + "r0 &= 0x7fffffff;" + /* link w1 and w0 via ID */ + "w1 = w0;" + /* 'if' statement propagates range info from w0 to w1, + * but should not affect w1->subreg_def property. + */ + "if w0 < 10 goto +0;" + /* r1 is read here, on archs that require subreg zero + * extension this would cause zext patch generation. + */ + "r1 >>= 32;" + "r0 = r1;" + "exit;" + : + : __imm(bpf_ktime_get_ns) + : __clobber_all); +} + char _license[] SEC("license") = "GPL"; -- 2.43.0

8 months, 1 week

1
0
0 0

[PATCH v2 0/5] implement lightweight guard pages

by Lorenzo Stoakes

Userland library functions such as allocators and threading implementations often require regions of memory to act as 'guard pages' - mappings which, when accessed, result in a fatal signal being sent to the accessing process. The current means by which these are implemented is via a PROT_NONE mmap() mapping, which provides the required semantics however incur an overhead of a VMA for each such region. With a great many processes and threads, this can rapidly add up and incur a significant memory penalty. It also has the added problem of preventing merges that might otherwise be permitted. This series takes a different approach - an idea suggested by Vlasimil Babka (and before him David Hildenbrand and Jann Horn - perhaps more - the provenance becomes a little tricky to ascertain after this - please forgive any omissions!) - rather than locating the guard pages at the VMA layer, instead placing them in page tables mapping the required ranges. Early testing of the prototype version of this code suggests a 5 times speed up in memory mapping invocations (in conjunction with use of process_madvise()) and a 13% reduction in VMAs on an entirely idle android system and unoptimised code. We expect with optimisation and a loaded system with a larger number of guard pages this could significantly increase, but in any case these numbers are encouraging. This way, rather than having separate VMAs specifying which parts of a range are guard pages, instead we have a VMA spanning the entire range of memory a user is permitted to access and including ranges which are to be 'guarded'. After mapping this, a user can specify which parts of the range should result in a fatal signal when accessed. By restricting the ability to specify guard pages to memory mapped by existing VMAs, we can rely on the mappings being torn down when the mappings are ultimately unmapped and everything works simply as if the memory were not faulted in, from the point of view of the containing VMAs. This mechanism in effect poisons memory ranges similar to hardware memory poisoning, only it is an entirely software-controlled form of poisoning. Any poisoned region of memory is also able to 'unpoisoned', that is, to have its poison markers removed. The mechanism is implemented via madvise() behaviour - MADV_GUARD_POISON which simply poisons ranges - and MADV_GUARD_UNPOISON - which clears this poisoning. Poisoning can be performed across multiple VMAs and any existing mappings will be cleared, that is zapped, before installing the poisoned page table mappings. There is no concept of 'nested' poisoning, multiple attempts to poison a range will, after the first poisoning, have no effect. Importantly, unpoisoning of poisoned ranges has no effect on non-poisoned memory, so a user can safely unpoison a range of memory and clear only poison page table mappings leaving the rest intact. The actual mechanism by which the page table entries are specified makes use of existing logic - PTE markers, which are used for the userfaultfd UFFDIO_POISON mechanism. Unfortunately PTE_MARKER_POISONED is not suited for the guard page mechanism as it results in VM_FAULT_HWPOISON semantics in the fault handler, so we add our own specific PTE_MARKER_GUARD and adapt existing logic to handle it. We also extend the generic page walk mechanism to allow for installation of PTEs (carefully restricted to memory management logic only to prevent unwanted abuse). We ensure that zapping performed by, for instance, MADV_DONTNEED, does not remove guard poison markers, nor does forking (except when VM_WIPEONFORK is specified for a VMA which implies a total removal of memory characteristics). It's important to note that the guard page implementation is emphatically NOT a security feature, so a user can remove the poisoning if they wish. We simply implement it in such a way as to provide the least surprising behaviour. An extensive set of self-tests are provided which ensure behaviour is as expected and additionally self-documents expected behaviour of poisoned ranges. Suggested-by: Vlastimil Babka <vbabka(a)suse.cz> Suggested-by: Jann Horn <jannh(a)google.com> Suggested-by: David Hildenbrand <david(a)redhat.com> v2 * The macros in kselftest_harness.h seem to be broken - __EXPECT() is terminated by '} while (0); OPTIONAL_HANDLER(_assert)' meaning it is not safe in single line if / else or for /which blocks, however working around this results in checkpatch producing invalid warnings, as reported by Shuah. * Fixing these macros is out of scope for this series, so compromise and instead rewrite test blocks so as to use multiple lines by separating out a decl in most cases. This has the side effect of, for the most part, making things more readable. * Heavily document the use of the volatile keyword - we can't avoid checkpatch complaining about this, so we explain it, as reported by Shuah. * Updated commit message to highlight that we skip tests we lack permissions for, as reported by Shuah. * Replaced a perror() with ksft_exit_fail_perror(), as reported by Shuah. * Added user friendly messages to cases where tests are skipped due to lack of permissions, as reported by Shuah. * Update the tool header to include the new MADV_GUARD_POISON/UNPOISON defines and directly include asm-generic/mman.h to get the platform-neutral versions to ensure we import them. * Finally fixed Vlastimil's email address in Suggested-by tags from suze to suse, as reported by Vlastimil. * Added linux-api to cc list, as reported by Vlastimil. v1 * Un-RFC'd as appears no major objections to approach but rather debate on implementation. * Fixed issue with arches which need mmu_context.h and tlbfush.h. header imports in pagewalker logic to be able to use update_mmu_cache() as reported by the kernel test bot. * Added comments in page walker logic to clarify who can use ops->install_pte and why as well as adding a check_ops_valid() helper function, as suggested by Christoph. * Pass false in full parameter in pte_clear_not_present_full() as suggested by Jann. * Stopped erroneously requiring a write lock for the poison operation as suggested by Jann and Suren. * Moved anon_vma_prepare() to the start of madvise_guard_poison() to be consistent with how this is used elsewhere in the kernel as suggested by Jann. * Avoid returning -EAGAIN if we are raced on page faults, just keep looping and duck out if a fatal signal is pending or a conditional reschedule is needed, as suggested by Jann. * Avoid needlessly splitting huge PUDs and PMDs by specifying ACTION_CONTINUE, as suggested by Jann. https://lore.kernel.org/all/cover.1729196871.git.lorenzo.stoakes@oracle.com/ RFC https://lore.kernel.org/all/cover.1727440966.git.lorenzo.stoakes@oracle.com/ Lorenzo Stoakes (5): mm: pagewalk: add the ability to install PTEs mm: add PTE_MARKER_GUARD PTE marker mm: madvise: implement lightweight guard page mechanism tools: testing: update tools UAPI header for mman-common.h selftests/mm: add self tests for guard page feature arch/alpha/include/uapi/asm/mman.h | 3 + arch/mips/include/uapi/asm/mman.h | 3 + arch/parisc/include/uapi/asm/mman.h | 3 + arch/xtensa/include/uapi/asm/mman.h | 3 + include/linux/mm_inline.h | 2 +- include/linux/pagewalk.h | 18 +- include/linux/swapops.h | 26 +- include/uapi/asm-generic/mman-common.h | 3 + mm/hugetlb.c | 3 + mm/internal.h | 6 + mm/madvise.c | 168 +++ mm/memory.c | 18 +- mm/mprotect.c | 3 +- mm/mseal.c | 1 + mm/pagewalk.c | 200 ++- tools/include/uapi/asm-generic/mman-common.h | 3 + tools/testing/selftests/mm/.gitignore | 1 + tools/testing/selftests/mm/Makefile | 1 + tools/testing/selftests/mm/guard-pages.c | 1228 ++++++++++++++++++ 19 files changed, 1627 insertions(+), 66 deletions(-) create mode 100644 tools/testing/selftests/mm/guard-pages.c -- 2.47.0

8 months, 1 week

10
65
0 0

[PATCH] kselftest/arm64: Log fp-stress child startup errors to stdout

by Mark Brown

Currently if we encounter an error between fork() and exec() of a child process we log the error to stderr. This means that the errors don't get annotated with the child information which makes diagnostics harder and means that if we miss the exit signal from the child we can deadlock waiting for output from the child. Improve robustness and output quality by logging to stdout instead. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/arm64/fp/fp-stress.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/arm64/fp/fp-stress.c b/tools/testing/selftests/arm64/fp/fp-stress.c index faac24bdefeb9436e2daf20b7250d0ae25ca23a7..80f22789504d661efc52a90d4b0893fbebec42f8 100644 --- a/tools/testing/selftests/arm64/fp/fp-stress.c +++ b/tools/testing/selftests/arm64/fp/fp-stress.c @@ -79,7 +79,7 @@ static void child_start(struct child_data *child, const char *program) */ ret = dup2(pipefd[1], 1); if (ret == -1) { - fprintf(stderr, "dup2() %d\n", errno); + printf("dup2() %d\n", errno); exit(EXIT_FAILURE); } @@ -89,7 +89,7 @@ static void child_start(struct child_data *child, const char *program) */ ret = dup2(startup_pipe[0], 3); if (ret == -1) { - fprintf(stderr, "dup2() %d\n", errno); + printf("dup2() %d\n", errno); exit(EXIT_FAILURE); } @@ -107,16 +107,15 @@ static void child_start(struct child_data *child, const char *program) */ ret = read(3, &i, sizeof(i)); if (ret < 0) - fprintf(stderr, "read(startp pipe) failed: %s (%d)\n", - strerror(errno), errno); + printf("read(startp pipe) failed: %s (%d)\n", + strerror(errno), errno); if (ret > 0) - fprintf(stderr, "%d bytes of data on startup pipe\n", - ret); + printf("%d bytes of data on startup pipe\n", ret); close(3); ret = execl(program, program, NULL); - fprintf(stderr, "execl(%s) failed: %d (%s)\n", - program, errno, strerror(errno)); + printf("execl(%s) failed: %d (%s)\n", + program, errno, strerror(errno)); exit(EXIT_FAILURE); } else { --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241017-arm64-fp-stress-exec-fail-d074ec82cf43 Best regards, -- Mark Brown <broonie(a)kernel.org>

8 months, 1 week

2
1
0 0

[PATCH bpf-next v2 0/4] Retire test_sock.c

by Jordan Rife

This patch series migrates test cases out of test_sock.c to prog_tests-style tests. It moves all BPF_CGROUP_INET4_POST_BIND and BPF_CGROUP_INET6_POST_BIND test cases into a new prog_test, sock_post_bind.c, while reimplementing all LOAD_REJECT test cases as verifier tests in progs/verifier_sock.c. Finally, it moves remaining BPF_CGROUP_INET_SOCK_CREATE test coverage into prog_tests/sock_create.c before retiring test_sock.c completely. Changes ======= v1->v2: - Remove superfluous verbose bool from the top of sock_post_bind.c. - Use ASSERT_OK_FD instead of ASSERT_GE to test cgroup_fd validity. - Run sock_post_bind tests in their own namespace, "sock_post_bind". Jordan Rife (4): selftests/bpf: Migrate *_POST_BIND test cases to prog_tests selftests/bpf: Migrate LOAD_REJECT test cases to prog_tests selftests/bpf: Migrate BPF_CGROUP_INET_SOCK_CREATE test cases to prog_tests selftests/bpf: Retire test_sock.c tools/testing/selftests/bpf/.gitignore | 1 - tools/testing/selftests/bpf/Makefile | 3 +- .../selftests/bpf/prog_tests/sock_create.c | 35 ++- .../sock_post_bind.c} | 256 +++++------------- .../selftests/bpf/progs/verifier_sock.c | 60 ++++ 5 files changed, 150 insertions(+), 205 deletions(-) rename tools/testing/selftests/bpf/{test_sock.c => prog_tests/sock_post_bind.c} (64%) -- 2.47.0.105.g07ac214952-goog

8 months, 1 week

2
5
0 0

[PATCH 1/2] selftests/intel_pstate: fix operand expected

by Alessandro Zanni

Running "make kselftest TARGETS=intel_pstate" results in the following errors: - ./run.sh: line 90: / 1000: syntax error: operand expected (error token is "/ 1000") - ./run.sh: line 92: / 1000: syntax error: operand expected (error token is "/ 1000") This fix allows to have cross-platform compatibility when using arithmetic expression with command substitutions. Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- tools/testing/selftests/intel_pstate/run.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/intel_pstate/run.sh b/tools/testing/selftests/intel_pstate/run.sh index e7008f614ad7..0c1b6c1308a4 100755 --- a/tools/testing/selftests/intel_pstate/run.sh +++ b/tools/testing/selftests/intel_pstate/run.sh @@ -87,9 +87,9 @@ mkt_freq=${_mkt_freq}0 # Get the ranges from cpupower _min_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $1 } ') -min_freq=$(($_min_freq / 1000)) +min_freq=$((_min_freq / 1000)) _max_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $2 } ') -max_freq=$(($_max_freq / 1000)) +max_freq=$((_max_freq / 1000)) [ $EVALUATE_ONLY -eq 0 ] && for freq in `seq $max_freq -100 $min_freq` -- 2.43.0 From d6500cf7c800bd39ae3ef2930cece5b3be460c0b Mon Sep 17 00:00:00 2001 From: Alessandro Zanni <alessandro.zanni87(a)gmail.com> Date: Tue, 22 Oct 2024 17:22:13 +0200 Subject: [PATCH 2/2] selftests/intel_pstate: cpupower command not found To: shuah(a)kernel.org Cc: linux-kselftest(a)vger.kernel.org, linux-kernel(a)vger.kernel.org, skhan(a)linuxfoundation.org, anupnewsmail(a)gmail.com Running "make kselftest TARGETS=intel_pstate" results in the following errors: - ./run.sh: line 89: cpupower: command not found - ./run.sh: line 91: cpupower: command not found if the cpupower is not installed. Since the test depends on cpupower, this patch stops the test if the cpupower is not installed. Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- tools/testing/selftests/intel_pstate/run.sh | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/testing/selftests/intel_pstate/run.sh b/tools/testing/selftests/intel_pstate/run.sh index 0c1b6c1308a4..6a3b8503264e 100755 --- a/tools/testing/selftests/intel_pstate/run.sh +++ b/tools/testing/selftests/intel_pstate/run.sh @@ -44,6 +44,11 @@ if [ $UID != 0 ] && [ $EVALUATE_ONLY == 0 ]; then exit $ksft_skip fi +if ! command -v cpupower &> /dev/null; then + echo $msg cpupower could not be found, please install it >&2 + exit $ksft_skip +fi + max_cpus=$(($(nproc)-1)) function run_test () { -- 2.43.0

8 months, 1 week

1
0
0 0

[PATCH] selftests/sched: add basic test for psi

by Pintu Kumar

There is a psi module that exists under kernel/sched/psi. Add a basic test to test the psi. This test just add the basic support to check cpu/memory/io interface. Further test will be added on top of this. Signed-off-by: Pintu Kumar <quic_pintu(a)quicinc.com> --- MAINTAINERS | 2 + tools/testing/selftests/sched/.gitignore | 1 + tools/testing/selftests/sched/Makefile | 4 +- tools/testing/selftests/sched/config | 1 + tools/testing/selftests/sched/psi_test.c | 85 ++++++++++++++++++++++++ tools/testing/selftests/sched/run_psi.sh | 36 ++++++++++ 6 files changed, 127 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/sched/psi_test.c create mode 100755 tools/testing/selftests/sched/run_psi.sh diff --git a/MAINTAINERS b/MAINTAINERS index 84a73e90cfe8..d84ff9ca36a9 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18548,10 +18548,12 @@ F: include/uapi/linux/pps.h PRESSURE STALL INFORMATION (PSI) M: Johannes Weiner <hannes(a)cmpxchg.org> M: Suren Baghdasaryan <surenb(a)google.com> +M: Pintu Kumar <quic_pintu(a)quicinc.com> R: Peter Ziljstra <peterz(a)infradead.org> S: Maintained F: include/linux/psi* F: kernel/sched/psi.c +F: tools/testing/selftests/sched/psi_test.c PRINTK M: Petr Mladek <pmladek(a)suse.com> diff --git a/tools/testing/selftests/sched/.gitignore b/tools/testing/selftests/sched/.gitignore index 6996d4654d92..2b15c11b93e6 100644 --- a/tools/testing/selftests/sched/.gitignore +++ b/tools/testing/selftests/sched/.gitignore @@ -1 +1,2 @@ cs_prctl_test +psi_test diff --git a/tools/testing/selftests/sched/Makefile b/tools/testing/selftests/sched/Makefile index 099ee9213557..795f6613eb2c 100644 --- a/tools/testing/selftests/sched/Makefile +++ b/tools/testing/selftests/sched/Makefile @@ -8,7 +8,7 @@ CFLAGS += -O2 -Wall -g -I./ $(KHDR_INCLUDES) -Wl,-rpath=./ \ $(CLANG_FLAGS) LDLIBS += -lpthread -TEST_GEN_FILES := cs_prctl_test -TEST_PROGS := cs_prctl_test +TEST_GEN_FILES := cs_prctl_test psi_test +TEST_PROGS := cs_prctl_test run_psi.sh include ../lib.mk diff --git a/tools/testing/selftests/sched/config b/tools/testing/selftests/sched/config index e8b09aa7c0c4..287cccd434fd 100644 --- a/tools/testing/selftests/sched/config +++ b/tools/testing/selftests/sched/config @@ -1 +1,2 @@ CONFIG_SCHED_DEBUG=y +CONFIG_PSI=y diff --git a/tools/testing/selftests/sched/psi_test.c b/tools/testing/selftests/sched/psi_test.c new file mode 100644 index 000000000000..eeba138d2b39 --- /dev/null +++ b/tools/testing/selftests/sched/psi_test.c @@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <stdio.h> +#include <string.h> +#include <fcntl.h> + + +struct load_avg { + float avg10; + float avg60; + float avg300; + unsigned long long total; +}; + +struct pressure { + struct load_avg some; + struct load_avg full; +}; + + +int psi_get_data_from_proc_pressure(const char *path, struct pressure *p) +{ + FILE *fp; + int rc = -1; + int ret = 0; + + if (path == NULL || p == NULL) + return -1; + + fp = fopen(path, "r"); + if (fp == NULL) + return -1; + + while (!feof(fp)) { + rc = fscanf(fp, "some avg10=%f avg60=%f avg300=%f total=%llu\n", + &p->some.avg10, &p->some.avg60, &p->some.avg300, &p->some.total); + if (rc < 1) { + ret = -1; + break; + } + + /* Note: In some cases (cpu) full may not exists */ + rc = fscanf(fp, "full avg10=%f avg60=%f avg300=%f total=%llu\n", + &p->full.avg10, &p->full.avg60, &p->full.avg300, &p->full.total); + /* We don't care about full case. This is needed to avoid warnings */ + rc = 0; + } + + fclose(fp); + + return ret; +} + +int main(int argc, char *argv[]) +{ + int ret; + struct pressure rs = {0,}; + char path[32]; + + if (argc < 2) { + fprintf(stderr, "usage: %s <path>\n", argv[0]); + return -1; + } + + memset(&rs, 0, sizeof(rs)); + printf("Pressure data: %s\n", argv[1]); + snprintf(path, sizeof(path)-1, "/proc/pressure/%s", argv[1]); + + ret = psi_get_data_from_proc_pressure(path, &rs); + if (ret < 0) { + printf("PSI <%s>: FAIL\n", argv[1]); + return -1; + } + printf("Some Avg10 = %5.2f\n", rs.some.avg10); + printf("Some Avg60 = %5.2f\n", rs.some.avg60); + printf("Some Avg300 = %5.2f\n", rs.some.avg300); + printf("Some Total = %llu\n", rs.some.total); + printf("Full Avg10 = %5.2f\n", rs.full.avg10); + printf("Full Avg60 = %5.2f\n", rs.full.avg60); + printf("Full Avg300 = %5.2f\n", rs.full.avg300); + printf("Full Total = %llu\n", rs.full.total); + + + return 0; +} diff --git a/tools/testing/selftests/sched/run_psi.sh b/tools/testing/selftests/sched/run_psi.sh new file mode 100755 index 000000000000..d0b1c7ae3736 --- /dev/null +++ b/tools/testing/selftests/sched/run_psi.sh @@ -0,0 +1,36 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + +# Just one node check is enough to detect psi +if [ ! -e /proc/pressure/cpu ]; then + echo "PSI not present..." + exit $ksft_skip +fi + +echo "" +./psi_test cpu +if [ $? -ne 0 ]; then + echo "CPU - [FAIL]" +else + echo "CPU - [PASS]" +fi + +echo "" +./psi_test memory +if [ $? -ne 0 ]; then + echo "MEMORY - [FAIL]" +else + echo "MEMORY - [PASS]" +fi + +echo "" +./psi_test io +if [ $? -ne 0 ]; then + echo "IO - [FAIL]" +else + echo "IO - [PASS]" +fi -- 2.17.1

8 months, 1 week

3
2
0 0

Re: [PATCH v2 2/2] mm/damon/vaddr: Add 'nr_piece == 1' check in damon_va_evenly_split_region()

by SeongJae Park

Hi Zheng, Cc-ed kunit folks, as we usually do for DAMON kunit test changes. On Tue, 22 Oct 2024 16:39:27 +0800 Zheng Yejian <zhengyejian(a)huaweicloud.com> wrote: > As discussed in [1], damon_va_evenly_split_region() is called to > size-evenly split a region into 'nr_pieces' small regions, > when nr_pieces == 1, no actual split is required. Check that case > for better code readability and add a simple kunit testcase. > > [1] https://lore.kernel.org/all/20241021163316.12443-1-sj@kernel.org/ > > Signed-off-by: Zheng Yejian <zhengyejian(a)huaweicloud.com> Reviewed-by: SeongJae Park <sj(a)kernel.org> Thanks, SJ [...]

8 months, 1 week

1
0
0 0

Re: [PATCH v2 1/2] mm/damon/vaddr: Fix issue in damon_va_evenly_split_region()

by SeongJae Park

Hi Zheng, We Cc kunit folks for any DAMON kunit test changes, so I Cc-ed them. On Tue, 22 Oct 2024 16:39:26 +0800 Zheng Yejian <zhengyejian(a)huaweicloud.com> wrote: > According to the logic of damon_va_evenly_split_region(), currently > following split case would not meet the expectation: > > Suppose DAMON_MIN_REGION=0x1000, > Case: Split [0x0, 0x3000) into 2 pieces, then the result would be > acutually 3 regions: > [0x0, 0x1000), [0x1000, 0x2000), [0x2000, 0x3000) > but NOT the expected 2 regions: > [0x0, 0x1000), [0x1000, 0x3000) !!! > > The root cause is that when calculating size of each split piece in > damon_va_evenly_split_region(): > > `sz_piece = ALIGN_DOWN(sz_orig / nr_pieces, DAMON_MIN_REGION);` > > both the dividing and the ALIGN_DOWN may cause loss of precision, > then each time split one piece of size 'sz_piece' from origin 'start' to > 'end' would cause more pieces are split out than expected!!! > > To fix it, count for each piece split and make sure no more than > 'nr_pieces'. In addition, add above case into damon_test_split_evenly(). > > After this patch, damon-operations test passed: Just for a clarification. damon-operations test doesn't fail without this patch. This patch introduces two changes. A new kunit test, and a bug fix. Without the bug fix, the new kunit test fails. I usually prefer separating test changes from fixes (introduc a fix first, and then the test for it, to avoid unnecessary test failures). But, given the small size and the simplicity of the kunit change for this patch, I think introducing it together with the fix is ok. > > # ./tools/testing/kunit/kunit.py run damon-operations > [...] > ============== damon-operations (6 subtests) =============== > [PASSED] damon_test_three_regions_in_vmas > [PASSED] damon_test_apply_three_regions1 > [PASSED] damon_test_apply_three_regions2 > [PASSED] damon_test_apply_three_regions3 > [PASSED] damon_test_apply_three_regions4 > [PASSED] damon_test_split_evenly > ================ [PASSED] damon-operations ================= > > Fixes: 3f49584b262c ("mm/damon: implement primitives for the virtual memory address spaces") > Signed-off-by: Zheng Yejian <zhengyejian(a)huaweicloud.com> Reviewed-by: SeongJae Park <sj(a)kernel.org> Thanks, SJ [...]

8 months, 1 week

1
0
0 0

[PATCH v5 0/3] selftests: livepatch: test livepatching a kprobed function

by Michael Vetter

Thanks for all the reviews. V5: Replace /sys/kernel/livepatch also in other/already existing tests. Improve commit message of 3rd patch. V4: Use variable for /sys/kernel/debug. Be consistent with "" around variables. Fix path in commit message to /sys/kernel/debug/kprobes/enabled. V3: Save and restore kprobe state also when test fails, by integrating it into setup_config() and cleanup(). Rename SYSFS variables in a more logical way. Sort test modules in alphabetical order. Rename module description. V2: Save and restore kprobe state. Michael Vetter (3): selftests: livepatch: rename KLP_SYSFS_DIR to SYSFS_KLP_DIR selftests: livepatch: save and restore kprobe state selftests: livepatch: test livepatching a kprobed function tools/testing/selftests/livepatch/Makefile | 3 +- .../testing/selftests/livepatch/functions.sh | 29 +++++---- .../selftests/livepatch/test-callbacks.sh | 24 +++---- .../selftests/livepatch/test-ftrace.sh | 2 +- .../selftests/livepatch/test-kprobe.sh | 62 +++++++++++++++++++ .../selftests/livepatch/test-livepatch.sh | 12 ++-- .../testing/selftests/livepatch/test-state.sh | 8 +-- .../selftests/livepatch/test-syscall.sh | 2 +- .../testing/selftests/livepatch/test-sysfs.sh | 8 +-- .../selftests/livepatch/test_modules/Makefile | 3 +- .../livepatch/test_modules/test_klp_kprobe.c | 38 ++++++++++++ 11 files changed, 150 insertions(+), 41 deletions(-) create mode 100755 tools/testing/selftests/livepatch/test-kprobe.sh create mode 100644 tools/testing/selftests/livepatch/test_modules/test_klp_kprobe.c -- 2.47.0

8 months, 1 week

5
11
0 0

[PATCH net-next 8/8] selftests: net: fdb_notify: Add a test for FDB notifications

by Petr Machata

Check that only one notification is produced for various FDB edit operations. Regarding the ip_link_add() and ip_link_master() helpers. This pattern of action plus corresponding defer is bound to come up often, and a dedicated vocabulary to capture it will be handy. tunnel_create() and vlan_create() from forwarding/lib.sh are somewhat opaque and perhaps too kitchen-sinky, so I tried to go in the opposite direction with these ones, and wrapped only the bare minimum to schedule a corresponding cleanup. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Amit Cohen <amcohen(a)nvidia.com> --- CC: Shuah Khan <shuah(a)kernel.org> CC: Benjamin Poirier <bpoirier(a)nvidia.com> CC: Hangbin Liu <liuhangbin(a)gmail.com> CC: linux-kselftest(a)vger.kernel.org CC: Jiri Pirko <jiri(a)resnulli.us> --- tools/testing/selftests/net/Makefile | 2 +- tools/testing/selftests/net/fdb_notify.sh | 95 +++++++++++++++++++++++ tools/testing/selftests/net/lib.sh | 17 ++++ 3 files changed, 113 insertions(+), 1 deletion(-) create mode 100755 tools/testing/selftests/net/fdb_notify.sh diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index 26a4883a65c9..ab0e8f30bfe7 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -92,7 +92,7 @@ TEST_PROGS += test_vxlan_mdb.sh TEST_PROGS += test_bridge_neigh_suppress.sh TEST_PROGS += test_vxlan_nolocalbypass.sh TEST_PROGS += test_bridge_backup_port.sh -TEST_PROGS += fdb_flush.sh +TEST_PROGS += fdb_flush.sh fdb_notify.sh TEST_PROGS += fq_band_pktlimit.sh TEST_PROGS += vlan_hw_filter.sh TEST_PROGS += bpf_offload.py diff --git a/tools/testing/selftests/net/fdb_notify.sh b/tools/testing/selftests/net/fdb_notify.sh new file mode 100755 index 000000000000..a98047361988 --- /dev/null +++ b/tools/testing/selftests/net/fdb_notify.sh @@ -0,0 +1,95 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +source lib.sh + +ALL_TESTS=" + test_dup_bridge + test_dup_vxlan_self + test_dup_vxlan_master + test_dup_macvlan_self + test_dup_macvlan_master +" + +do_test_dup() +{ + local op=$1; shift + local what=$1; shift + local tmpf + + RET=0 + + tmpf=$(mktemp) + defer rm "$tmpf" + + defer_scope_push + bridge monitor fdb &> "$tmpf" & + defer kill_process $! + + bridge fdb "$op" 00:11:22:33:44:55 vlan 1 "$@" + sleep 0.2 + defer_scope_pop + + local count=$(grep -c -e 00:11:22:33:44:55 $tmpf) + ((count == 1)) + check_err $? "Got $count notifications, expected 1" + + log_test "$what $op: Duplicate notifications" +} + +test_dup_bridge() +{ + ip_link_add br up type bridge vlan_filtering 1 + do_test_dup add "bridge" dev br self + do_test_dup del "bridge" dev br self +} + +test_dup_vxlan_self() +{ + ip_link_add br up type bridge vlan_filtering 1 + ip_link_add vx up type vxlan id 2000 dstport 4789 + ip_link_master vx br + + do_test_dup add "vxlan" dev vx self dst 192.0.2.1 + do_test_dup del "vxlan" dev vx self dst 192.0.2.1 +} + +test_dup_vxlan_master() +{ + ip_link_add br up type bridge vlan_filtering 1 + ip_link_add vx up type vxlan id 2000 dstport 4789 + ip_link_master vx br + + do_test_dup add "vxlan master" dev vx master + do_test_dup del "vxlan master" dev vx master +} + +test_dup_macvlan_self() +{ + ip_link_add dd up type dummy + ip_link_add mv up link dd type macvlan mode passthru + + do_test_dup add "macvlan self" dev mv self + do_test_dup del "macvlan self" dev mv self +} + +test_dup_macvlan_master() +{ + ip_link_add br up type bridge vlan_filtering 1 + ip_link_add dd up type dummy + ip_link_add mv up link dd type macvlan mode passthru + ip_link_master mv br + + do_test_dup add "macvlan master" dev mv self + do_test_dup del "macvlan master" dev mv self +} + +cleanup() +{ + defer_scopes_cleanup +} + +trap cleanup EXIT +tests_run + +exit $EXIT_STATUS diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index 24f63e45735d..8994fec1c38f 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -442,3 +442,20 @@ kill_process() # Suppress noise from killing the process. { kill $pid && wait $pid; } 2>/dev/null } + +ip_link_add() +{ + local name=$1; shift + + ip link add name "$name" "$@" + defer ip link del dev "$name" +} + +ip_link_master() +{ + local member=$1; shift + local master=$1; shift + + ip link set dev "$member" master "$master" + defer ip link set dev "$member" nomaster +} -- 2.45.0

8 months, 1 week

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[PATCH net-next 7/8] selftests: net: lib: Add kill_process

by Petr Machata

A number of selftests run processes in the background and need to kill them afterwards. Instead for everyone to open-code the kill / wait / redirect mantra, add a helper in net/lib.sh. Convert existing open-code sites. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Amit Cohen <amcohen(a)nvidia.com> --- CC: Shuah Khan <shuah(a)kernel.org> CC: Benjamin Poirier <bpoirier(a)nvidia.com> CC: Hangbin Liu <liuhangbin(a)gmail.com> CC: linux-kselftest(a)vger.kernel.org CC: Jiri Pirko <jiri(a)resnulli.us> CC: Andrew Lunn <andrew+netdev(a)lunn.ch> --- .../selftests/drivers/net/mlxsw/devlink_trap.sh | 2 +- .../drivers/net/mlxsw/devlink_trap_l3_drops.sh | 4 ++-- .../drivers/net/mlxsw/devlink_trap_l3_exceptions.sh | 12 ++++++------ .../drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh | 4 ++-- .../drivers/net/mlxsw/devlink_trap_tunnel_ipip6.sh | 4 ++-- .../drivers/net/mlxsw/devlink_trap_tunnel_vxlan.sh | 4 ++-- .../net/mlxsw/devlink_trap_tunnel_vxlan_ipv6.sh | 4 ++-- .../testing/selftests/drivers/net/mlxsw/tc_sample.sh | 4 ++-- .../drivers/net/netdevsim/fib_notifications.sh | 6 +++--- tools/testing/selftests/net/drop_monitor_tests.sh | 2 +- tools/testing/selftests/net/fib_tests.sh | 8 ++++---- .../testing/selftests/net/forwarding/devlink_lib.sh | 2 +- tools/testing/selftests/net/forwarding/lib.sh | 3 +-- tools/testing/selftests/net/forwarding/tc_police.sh | 8 ++++---- tools/testing/selftests/net/lib.sh | 8 ++++++++ 15 files changed, 41 insertions(+), 34 deletions(-) diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap.sh index 89b55e946eed..36055279ba92 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap.sh @@ -116,7 +116,7 @@ dev_del_test() log_test "Device delete" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid } trap cleanup EXIT diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_drops.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_drops.sh index 160891dcb4bc..db5806d189bb 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_drops.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_drops.sh @@ -595,7 +595,7 @@ irif_disabled_test() log_test "Ingress RIF disabled" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid ip link set dev $rp1 nomaster __addr_add_del $rp1 add 192.0.2.2/24 2001:db8:1::2/64 ip link del dev br0 type bridge @@ -645,7 +645,7 @@ erif_disabled_test() log_test "Egress RIF disabled" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid __addr_add_del $rp1 add 192.0.2.2/24 2001:db8:1::2/64 ip link del dev br0 type bridge devlink_trap_action_set $trap_name "drop" diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh index 190c1b6b5365..5d6d88b600f0 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_l3_exceptions.sh @@ -202,7 +202,7 @@ mtu_value_is_too_small_test() mtu_restore $rp2 - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $h1 ingress protocol ip pref 1 handle 101 flower } @@ -235,7 +235,7 @@ __ttl_value_is_too_small_test() log_test "TTL value is too small: TTL=$ttl_val" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $h1 ingress protocol ip pref 1 handle 101 flower } @@ -299,7 +299,7 @@ __mc_reverse_path_forwarding_test() log_test "Multicast reverse path forwarding: $desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $rp2 egress protocol $proto pref 1 handle 101 flower } @@ -347,7 +347,7 @@ __reject_route_test() log_test "Reject route: $desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid ip route del unreachable $unreachable tc filter del dev $h1 ingress protocol $proto pref 1 handle 101 flower } @@ -542,7 +542,7 @@ ipv4_lpm_miss_test() log_test "LPM miss: IPv4" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid vrf_without_routes_destroy } @@ -569,7 +569,7 @@ ipv6_lpm_miss_test() log_test "LPM miss: IPv6" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid vrf_without_routes_destroy } diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh index e9a82cae8c9a..4ac1dae92d0f 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip.sh @@ -176,7 +176,7 @@ ecn_decap_test() log_test "$desc: Inner ECN is not ECT and outer is $ecn_desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower } @@ -207,7 +207,7 @@ no_matching_tunnel_test() log_test "$desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower } diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip6.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip6.sh index 878125041fc3..fce885184404 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip6.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_ipip6.sh @@ -176,7 +176,7 @@ ecn_decap_test() log_test "$desc: Inner ECN is not ECT and outer is $ecn_desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ipv6 pref 1 handle 101 flower } @@ -207,7 +207,7 @@ no_matching_tunnel_test() log_test "$desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ipv6 pref 1 handle 101 flower } diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan.sh index 5f6eb965cfd1..7aca8e5922cf 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan.sh @@ -183,7 +183,7 @@ ecn_decap_test() log_test "$desc: Inner ECN is not ECT and outer is $ecn_desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower } @@ -253,7 +253,7 @@ corrupted_packet_test() log_test "$desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower } diff --git a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan_ipv6.sh b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan_ipv6.sh index f6c16cbb6cf7..4599c331240b 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan_ipv6.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/devlink_trap_tunnel_vxlan_ipv6.sh @@ -188,7 +188,7 @@ ecn_decap_test() log_test "$desc: Inner ECN is not ECT and outer is $ecn_desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ipv6 pref 1 handle 101 flower } @@ -262,7 +262,7 @@ corrupted_packet_test() log_test "$desc" - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $swp1 egress protocol ipv6 pref 1 handle 101 flower } diff --git a/tools/testing/selftests/drivers/net/mlxsw/tc_sample.sh b/tools/testing/selftests/drivers/net/mlxsw/tc_sample.sh index 83a0210e7544..bc7ea2df49fb 100755 --- a/tools/testing/selftests/drivers/net/mlxsw/tc_sample.sh +++ b/tools/testing/selftests/drivers/net/mlxsw/tc_sample.sh @@ -218,7 +218,7 @@ psample_capture_start() psample_capture_stop() { - { kill %% && wait %%; } 2>/dev/null + kill_process %% } __tc_sample_rate_test() @@ -499,7 +499,7 @@ tc_sample_md_out_tc_occ_test() backlog=$(tc -j -p -s qdisc show dev $rp2 | jq '.[0]["backlog"]') # Kill mausezahn. - { kill %% && wait %%; } 2>/dev/null + kill_process %% psample_capture_stop diff --git a/tools/testing/selftests/drivers/net/netdevsim/fib_notifications.sh b/tools/testing/selftests/drivers/net/netdevsim/fib_notifications.sh index 8d91191a098c..9896580c3d85 100755 --- a/tools/testing/selftests/drivers/net/netdevsim/fib_notifications.sh +++ b/tools/testing/selftests/drivers/net/netdevsim/fib_notifications.sh @@ -94,7 +94,7 @@ route_addition_check() sleep 1 $IP route add $route dev dummy1 sleep 1 - kill %% && wait %% &> /dev/null + kill_process %% route_notify_check $outfile $expected_num_notifications $offload_failed rm -f $outfile @@ -148,7 +148,7 @@ route_deletion_check() sleep 1 $IP route del $route dev dummy1 sleep 1 - kill %% && wait %% &> /dev/null + kill_process %% route_notify_check $outfile $expected_num_notifications rm -f $outfile @@ -191,7 +191,7 @@ route_replacement_check() sleep 1 $IP route replace $route dev dummy2 sleep 1 - kill %% && wait %% &> /dev/null + kill_process %% route_notify_check $outfile $expected_num_notifications rm -f $outfile diff --git a/tools/testing/selftests/net/drop_monitor_tests.sh b/tools/testing/selftests/net/drop_monitor_tests.sh index 7c4818c971fc..507d0a82f5f0 100755 --- a/tools/testing/selftests/net/drop_monitor_tests.sh +++ b/tools/testing/selftests/net/drop_monitor_tests.sh @@ -77,7 +77,7 @@ sw_drops_test() rm ${dir}/packets.pcap - { kill %% && wait %%; } 2>/dev/null + kill_process %% timeout 5 dwdump -o sw -w ${dir}/packets.pcap (( $(tshark -r ${dir}/packets.pcap \ -Y 'ip.dst == 192.0.2.10' 2> /dev/null | wc -l) == 0)) diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh index 5f3c28fc8624..3ea6f886a210 100755 --- a/tools/testing/selftests/net/fib_tests.sh +++ b/tools/testing/selftests/net/fib_tests.sh @@ -689,7 +689,7 @@ fib6_notify_test() log_test $ret 0 "ipv6 route add notify" - { kill %% && wait %%; } 2>/dev/null + kill_process %% #rm errors.txt @@ -736,7 +736,7 @@ fib_notify_test() log_test $ret 0 "ipv4 route add notify" - { kill %% && wait %%; } 2>/dev/null + kill_process %% rm errors.txt @@ -2328,7 +2328,7 @@ ipv4_mangle_test() $IP route del table 123 172.16.101.0/24 dev veth1 $IP rule del pref 100 - { kill %% && wait %%; } 2>/dev/null + kill_process %% rm $tmp_file route_cleanup @@ -2386,7 +2386,7 @@ ipv6_mangle_test() $IP -6 route del table 123 2001:db8:101::/64 dev veth1 $IP -6 rule del pref 100 - { kill %% && wait %%; } 2>/dev/null + kill_process %% rm $tmp_file route_cleanup diff --git a/tools/testing/selftests/net/forwarding/devlink_lib.sh b/tools/testing/selftests/net/forwarding/devlink_lib.sh index 62a05bca1e82..18afa89ebbcc 100644 --- a/tools/testing/selftests/net/forwarding/devlink_lib.sh +++ b/tools/testing/selftests/net/forwarding/devlink_lib.sh @@ -501,7 +501,7 @@ devlink_trap_drop_cleanup() local pref=$1; shift local handle=$1; shift - kill $mz_pid && wait $mz_pid &> /dev/null + kill_process $mz_pid tc filter del dev $dev egress protocol $proto pref $pref handle $handle flower } diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index 8625e3c99f55..7337f398f9cc 100644 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -1574,8 +1574,7 @@ stop_traffic() { local pid=${1-%%}; shift - # Suppress noise from killing mausezahn. - { kill $pid && wait $pid; } 2>/dev/null + kill_process "$pid" } declare -A cappid diff --git a/tools/testing/selftests/net/forwarding/tc_police.sh b/tools/testing/selftests/net/forwarding/tc_police.sh index 5103f64a71d6..509fdedfcfa1 100755 --- a/tools/testing/selftests/net/forwarding/tc_police.sh +++ b/tools/testing/selftests/net/forwarding/tc_police.sh @@ -148,7 +148,7 @@ police_common_test() log_test "$test_name" - { kill %% && wait %%; } 2>/dev/null + kill_process %% tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower } @@ -198,7 +198,7 @@ police_shared_common_test() log_test "$test_name" - { kill %% && wait %%; } 2>/dev/null + kill_process %% } police_shared_test() @@ -278,7 +278,7 @@ police_mirror_common_test() log_test "$test_name" - { kill %% && wait %%; } 2>/dev/null + kill_process %% tc filter del dev $pol_if $dir protocol ip pref 1 handle 101 flower tc filter del dev $h3 ingress protocol ip pref 1 handle 101 flower tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower @@ -320,7 +320,7 @@ police_pps_common_test() log_test "$test_name" - { kill %% && wait %%; } 2>/dev/null + kill_process %% tc filter del dev $h2 ingress protocol ip pref 1 handle 101 flower } diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index 6bcf5d13879d..24f63e45735d 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -434,3 +434,11 @@ xfail_on_veth() "$@" fi } + +kill_process() +{ + local pid=$1; shift + + # Suppress noise from killing the process. + { kill $pid && wait $pid; } 2>/dev/null +} -- 2.45.0

8 months, 1 week

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[PATCH net-next 6/8] selftests: net: lib: Move checks from forwarding/lib.sh here

by Petr Machata

For logging to be useful, something has to set RET and retmsg by calling ret_set_ksft_status(). There is a suite of functions to that end in forwarding/lib: check_err, check_fail et.al. Move them to net/lib.sh so that every net test can use them. Existing lib.sh users might be using these same names for their functions. However lib.sh is always sourced near the top of the file (checked), and whatever new definitions will simply override the ones provided by lib.sh. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Amit Cohen <amcohen(a)nvidia.com> --- CC: Shuah Khan <shuah(a)kernel.org> CC: Benjamin Poirier <bpoirier(a)nvidia.com> CC: Hangbin Liu <liuhangbin(a)gmail.com> CC: linux-kselftest(a)vger.kernel.org CC: Jiri Pirko <jiri(a)resnulli.us> --- tools/testing/selftests/net/forwarding/lib.sh | 73 ------------------- tools/testing/selftests/net/lib.sh | 73 +++++++++++++++++++ 2 files changed, 73 insertions(+), 73 deletions(-) diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index d28dbf27c1f0..8625e3c99f55 100644 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -445,79 +445,6 @@ done ############################################################################## # Helpers -# Whether FAILs should be interpreted as XFAILs. Internal. -FAIL_TO_XFAIL= - -check_err() -{ - local err=$1 - local msg=$2 - - if ((err)); then - if [[ $FAIL_TO_XFAIL = yes ]]; then - ret_set_ksft_status $ksft_xfail "$msg" - else - ret_set_ksft_status $ksft_fail "$msg" - fi - fi -} - -check_fail() -{ - local err=$1 - local msg=$2 - - check_err $((!err)) "$msg" -} - -check_err_fail() -{ - local should_fail=$1; shift - local err=$1; shift - local what=$1; shift - - if ((should_fail)); then - check_fail $err "$what succeeded, but should have failed" - else - check_err $err "$what failed" - fi -} - -xfail() -{ - FAIL_TO_XFAIL=yes "$@" -} - -xfail_on_slow() -{ - if [[ $KSFT_MACHINE_SLOW = yes ]]; then - FAIL_TO_XFAIL=yes "$@" - else - "$@" - fi -} - -omit_on_slow() -{ - if [[ $KSFT_MACHINE_SLOW != yes ]]; then - "$@" - fi -} - -xfail_on_veth() -{ - local dev=$1; shift - local kind - - kind=$(ip -j -d link show dev $dev | - jq -r '.[].linkinfo.info_kind') - if [[ $kind = veth ]]; then - FAIL_TO_XFAIL=yes "$@" - else - "$@" - fi -} - not() { "$@" diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index 4f52b8e48a3a..6bcf5d13879d 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -361,3 +361,76 @@ tests_run() $current_test done } + +# Whether FAILs should be interpreted as XFAILs. Internal. +FAIL_TO_XFAIL= + +check_err() +{ + local err=$1 + local msg=$2 + + if ((err)); then + if [[ $FAIL_TO_XFAIL = yes ]]; then + ret_set_ksft_status $ksft_xfail "$msg" + else + ret_set_ksft_status $ksft_fail "$msg" + fi + fi +} + +check_fail() +{ + local err=$1 + local msg=$2 + + check_err $((!err)) "$msg" +} + +check_err_fail() +{ + local should_fail=$1; shift + local err=$1; shift + local what=$1; shift + + if ((should_fail)); then + check_fail $err "$what succeeded, but should have failed" + else + check_err $err "$what failed" + fi +} + +xfail() +{ + FAIL_TO_XFAIL=yes "$@" +} + +xfail_on_slow() +{ + if [[ $KSFT_MACHINE_SLOW = yes ]]; then + FAIL_TO_XFAIL=yes "$@" + else + "$@" + fi +} + +omit_on_slow() +{ + if [[ $KSFT_MACHINE_SLOW != yes ]]; then + "$@" + fi +} + +xfail_on_veth() +{ + local dev=$1; shift + local kind + + kind=$(ip -j -d link show dev $dev | + jq -r '.[].linkinfo.info_kind') + if [[ $kind = veth ]]; then + FAIL_TO_XFAIL=yes "$@" + else + "$@" + fi +} -- 2.45.0

8 months, 1 week

1
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[PATCH net-next 5/8] selftests: net: lib: Move tests_run from forwarding/lib.sh here

by Petr Machata

It would be good to use the same mechanism for scheduling and dispatching general net tests as the many forwarding tests already use. To that end, move the logging helpers to net/lib.sh so that every net test can use them. Existing lib.sh users might be using the name themselves. However lib.sh is always sourced near the top of the file (checked), and whatever new definition will simply override the one provided by lib.sh. Signed-off-by: Petr Machata <petrm(a)nvidia.com> Reviewed-by: Amit Cohen <amcohen(a)nvidia.com> --- CC: Shuah Khan <shuah(a)kernel.org> CC: Benjamin Poirier <bpoirier(a)nvidia.com> CC: Hangbin Liu <liuhangbin(a)gmail.com> CC: linux-kselftest(a)vger.kernel.org CC: Jiri Pirko <jiri(a)resnulli.us> --- tools/testing/selftests/net/forwarding/lib.sh | 10 ---------- tools/testing/selftests/net/lib.sh | 10 ++++++++++ 2 files changed, 10 insertions(+), 10 deletions(-) diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index 41dd14c42c48..d28dbf27c1f0 100644 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -1285,16 +1285,6 @@ matchall_sink_create() action drop } -tests_run() -{ - local current_test - - for current_test in ${TESTS:-$ALL_TESTS}; do - in_defer_scope \ - $current_test - done -} - cleanup() { pre_cleanup diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index 691318b1ec55..4f52b8e48a3a 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -351,3 +351,13 @@ log_info() echo "INFO: $msg" } + +tests_run() +{ + local current_test + + for current_test in ${TESTS:-$ALL_TESTS}; do + in_defer_scope \ + $current_test + done +} -- 2.45.0

8 months, 1 week

1
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[PATCH 0/5] Improve arm64 pkeys handling in signal delivery

by Kevin Brodsky

This series is a follow-up to Joey's Permission Overlay Extension (POE) series [1] that recently landed on mainline. The goal is to improve the way we handle the register that governs which pkeys/POIndex are accessible (POR_EL0) during signal delivery. As things stand, we may unexpectedly fail to write the signal frame on the stack because POR_EL0 is not reset before the uaccess operations. See patch 3 for more details and the main changes this series brings. A similar series landed recently for x86/MPK [2]; the present series aims at aligning arm64 with x86. Worth noting: once the signal frame is written, POR_EL0 is still set to POR_EL0_INIT, granting access to pkey 0 only. This means that a program that sets up an alternate signal stack with a non-zero pkey will need some assembly trampoline to set POR_EL0 before invoking the real signal handler, as discussed here [3]. The x86 series also added kselftests to ensure that no spurious SIGSEGV occurs during signal delivery regardless of which pkey is accessible at the point where the signal is delivered. This series adapts those kselftests to allow running them on arm64 (patch 4-5). Finally patch 2 is a clean-up following feedback on Joey's series [4]. I have tested this series on arm64 and x86_64 (booting and running the protection_keys and pkey_sighandler_tests mm kselftests). - Kevin [1] https://lore.kernel.org/linux-arm-kernel/20240822151113.1479789-1-joey.goul… [2] https://lore.kernel.org/lkml/20240802061318.2140081-1-aruna.ramakrishna@ora… [3] https://lore.kernel.org/lkml/CABi2SkWxNkP2O7ipkP67WKz0-LV33e5brReevTTtba6oK… [4] https://lore.kernel.org/linux-arm-kernel/20241015114116.GA19334@willie-the-… Cc: akpm(a)linux-foundation.org Cc: anshuman.khandual(a)arm.com Cc: aruna.ramakrishna(a)oracle.com Cc: broonie(a)kernel.org Cc: catalin.marinas(a)arm.com Cc: dave.hansen(a)linux.intel.com Cc: dave.martin(a)arm.com Cc: jeffxu(a)chromium.org Cc: joey.gouly(a)arm.com Cc: shuah(a)kernel.org Cc: will(a)kernel.org Cc: linux-kselftest(a)vger.kernel.org Cc: x86(a)kernel.org Kevin Brodsky (5): arm64: signal: Remove unused macro arm64: signal: Remove unnecessary check when saving POE state arm64: signal: Improve POR_EL0 handling to avoid uaccess failures selftests/mm: Use generic pkey register manipulation selftests/mm: Enable pkey_sighandler_tests on arm64 arch/arm64/kernel/signal.c | 92 +++++++++++++--- tools/testing/selftests/mm/Makefile | 8 +- tools/testing/selftests/mm/pkey-arm64.h | 1 + tools/testing/selftests/mm/pkey-x86.h | 2 + .../selftests/mm/pkey_sighandler_tests.c | 101 +++++++++++++----- 5 files changed, 159 insertions(+), 45 deletions(-) -- 2.43.0

8 months, 1 week

7
26
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[PATCH] KVM: selftests: Fix build on on non-x86 architectures

by Mark Brown

Commit 9a400068a158 ("KVM: selftests: x86: Avoid using SSE/AVX instructions") unconditionally added -march=x86-64-v2 to the CFLAGS used to build the KVM selftests which does not work on non-x86 architectures: cc1: error: unknown value ‘x86-64-v2’ for ‘-march’ Fix this by making the addition of this x86 specific command line flag conditional on building for x86. Fixes: 9a400068a158 ("KVM: selftests: x86: Avoid using SSE/AVX instructions") Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/kvm/Makefile | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index e6b7e01d57080b304b21120f0d47bda260ba6c43..156fbfae940feac649f933dc6e048a2e2926542a 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -244,11 +244,13 @@ CFLAGS += -Wall -Wstrict-prototypes -Wuninitialized -O2 -g -std=gnu99 \ -fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) \ -I$(LINUX_TOOL_ARCH_INCLUDE) -I$(LINUX_HDR_PATH) -Iinclude \ -I$(<D) -Iinclude/$(ARCH_DIR) -I ../rseq -I.. $(EXTRA_CFLAGS) \ - -march=x86-64-v2 \ $(KHDR_INCLUDES) ifeq ($(ARCH),s390) CFLAGS += -march=z10 endif +ifeq ($(ARCH),x86) + CFLAGS += -march=x86-64-v2 +endif ifeq ($(ARCH),arm64) tools_dir := $(top_srcdir)/tools arm64_tools_dir := $(tools_dir)/arch/arm64/tools/ --- base-commit: d129377639907fce7e0a27990e590e4661d3ee02 change-id: 20241021-kvm-build-break-495abedc51e0 Best regards, -- Mark Brown <broonie(a)kernel.org>

8 months, 1 week

3
2
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[PATCH net-next v2 00/10] selftests: net: Introduce deferred commands

by Petr Machata

Recently, a defer helper was added to Python selftests. The idea is to keep cleanup commands close to their dirtying counterparts, thereby making it more transparent what is cleaning up what, making it harder to miss a cleanup, and make the whole cleanup business exception safe. All these benefits are applicable to bash as well, exception safety can be interpreted in terms of safety vs. a SIGINT. This patchset therefore introduces a framework of several helpers that serve to schedule cleanups in bash selftests. - Patch #1 has more details about the primitives being introduced. Patch #2 adds a fallback cleanup() function to lib.sh, because ideally selftests wouldn't need to introduce a dedicated cleanup function at all. - Patch #3 adds a parameter to stop_traffic(), which makes it possible to start other background processes after the traffic is started without confusing the cleanup. - Patches #4 to #10 convert a number of selftests. The goal was to convert all tests that use start_traffic / stop_traffic to the defer framework. Leftover traffic generators are a particularly painful sort of a missed cleanup. Normal unfinished cleanups can usually be cleaned up simply by rerunning the test and interrupting it early to let the cleanups run again / in full. This does not work with stop_traffic, because it is only issued at the end of the test case that starts the traffic. At the same time, leftover traffic generators influence follow-up test runs, and are hard to notice. The tests were however converted whole-sale, not just their traffic bits. Thus they form a proof of concept of the defer framework. v2: - Patch #1: - In __defer__schedule(), use ndefers in place of ${__DEFER__NJOBS[$ndefers_key]} - Patch #4: - Defer stop_traffic including the sleep. The sleep is actually necessary and v1 was wrong in that it had the sleep prior to the stop_traffic invocation. v1 (from the RFC): - Patch #1: - Added the priority defer track - Dropped defer_scoped_fn, added in_defer_scope - Extracted to a separate independent module - Patch #2: - Moved this bit to a separate patch - Patch #3: - New patch - Patch #4 (RED): - Squashed the individual RED-related patches into one - Converted the SW datapath RED selftest as well - Patch #5 (TBF): - Fully converted the selftest, not just stop_traffic - Patches #6, #7, #8, #9, #10: - New patch Petr Machata (10): selftests: net: lib: Introduce deferred commands selftests: forwarding: Add a fallback cleanup() selftests: forwarding: lib: Allow passing PID to stop_traffic() selftests: RED: Use defer for test cleanup selftests: TBF: Use defer for test cleanup selftests: ETS: Use defer for test cleanup selftests: mlxsw: qos_mc_aware: Use defer for test cleanup selftests: mlxsw: qos_ets_strict: Use defer for test cleanup selftests: mlxsw: qos_max_descriptors: Use defer for test cleanup selftests: mlxsw: devlink_trap_police: Use defer for test cleanup .../drivers/net/mlxsw/devlink_trap_policer.sh | 85 ++++---- .../drivers/net/mlxsw/qos_ets_strict.sh | 167 ++++++++-------- .../drivers/net/mlxsw/qos_max_descriptors.sh | 118 ++++------- .../drivers/net/mlxsw/qos_mc_aware.sh | 146 +++++++------- .../selftests/drivers/net/mlxsw/sch_ets.sh | 26 ++- .../drivers/net/mlxsw/sch_red_core.sh | 185 +++++++++--------- .../drivers/net/mlxsw/sch_red_ets.sh | 24 +-- .../drivers/net/mlxsw/sch_red_root.sh | 18 +- tools/testing/selftests/net/forwarding/lib.sh | 13 +- .../selftests/net/forwarding/sch_ets.sh | 7 +- .../selftests/net/forwarding/sch_ets_core.sh | 81 +++----- .../selftests/net/forwarding/sch_ets_tests.sh | 14 +- .../selftests/net/forwarding/sch_red.sh | 103 ++++------ .../selftests/net/forwarding/sch_tbf_core.sh | 91 +++------ .../net/forwarding/sch_tbf_etsprio.sh | 7 +- .../selftests/net/forwarding/sch_tbf_root.sh | 3 +- tools/testing/selftests/net/lib.sh | 3 + tools/testing/selftests/net/lib/Makefile | 2 +- tools/testing/selftests/net/lib/sh/defer.sh | 115 +++++++++++ 19 files changed, 595 insertions(+), 613 deletions(-) create mode 100644 tools/testing/selftests/net/lib/sh/defer.sh -- 2.45.0

8 months, 1 week

2
11
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[PATCH] kselftest/arm64: Fail the overall fp-stress test if any test fails

by Mark Brown

Currently fp-stress does not report a top level test result if it runs to completion, it always exits with a return code 0. Use the ksft_finished() helper to ensure that the exit code for the top level program reports a failure if any of the individual tests has failed. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/arm64/fp/fp-stress.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/tools/testing/selftests/arm64/fp/fp-stress.c b/tools/testing/selftests/arm64/fp/fp-stress.c index faac24bdefeb9436e2daf20b7250d0ae25ca23a7..e62c9dbad5010234d70b477cf8c52ba0b312910e 100644 --- a/tools/testing/selftests/arm64/fp/fp-stress.c +++ b/tools/testing/selftests/arm64/fp/fp-stress.c @@ -651,7 +651,5 @@ int main(int argc, char **argv) drain_output(true); - ksft_print_cnts(); - - return 0; + ksft_finished(); } --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241017-arm64-fp-stress-exit-code-90fe21dc4bc3 Best regards, -- Mark Brown <broonie(a)kernel.org>

8 months, 1 week

2
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[PATCH v3 0/5] Add support for the Idle HLT intercept feature

by Manali Shukla

The upcoming new Idle HLT Intercept feature allows for the HLT instruction execution by a vCPU to be intercepted by the hypervisor only if there are no pending V_INTR and V_NMI events for the vCPU. When the vCPU is expected to service the pending V_INTR and V_NMI events, the Idle HLT intercept won’t trigger. The feature allows the hypervisor to determine if the vCPU is actually idle and reduces wasteful VMEXITs. Presence of the Idle HLT Intercept feature is indicated via CPUID function Fn8000_000A_EDX[30]. Document for the Idle HLT intercept feature is available at [1]. [1]: AMD64 Architecture Programmer's Manual Pub. 24593, April 2024, Vol 2, 15.9 Instruction Intercepts (Table 15-7: IDLE_HLT). https://bugzilla.kernel.org/attachment.cgi?id=306250 Testing Done: - Added a selftest to test the Idle HLT intercept functionality. - Compile and functionality testing for the Idle HLT intercept selftest are only done for x86_64. - Tested SEV and SEV-ES guest for the Idle HLT intercept functionality. v2 -> v3 - Incorporated Andrew's suggestion to structure vcpu_stat_types in a way that each architecture can share the generic types and also provide its own. v1 -> v2 - Done changes in svm_idle_hlt_test based on the review comments from Sean. - Added an enum based approach to get binary stats in vcpu_get_stat() which doesn't use string to get stat data based on the comments from Sean. - Added self_halt() and cli() helpers based on the comments from Sean. Manali Shukla (5): x86/cpufeatures: Add CPUID feature bit for Idle HLT intercept KVM: SVM: Add Idle HLT intercept support KVM: selftests: Add safe_halt() and cli() helpers to common code KVM: selftests: Add an interface to read the data of named vcpu stat KVM: selftests: KVM: SVM: Add Idle HLT intercept test arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/include/asm/svm.h | 1 + arch/x86/include/uapi/asm/svm.h | 2 + arch/x86/kvm/svm/svm.c | 11 ++- tools/testing/selftests/kvm/Makefile | 1 + .../testing/selftests/kvm/include/kvm_util.h | 44 +++++++++ .../kvm/include/x86_64/kvm_util_arch.h | 40 +++++++++ .../selftests/kvm/include/x86_64/processor.h | 18 ++++ tools/testing/selftests/kvm/lib/kvm_util.c | 32 +++++++ .../selftests/kvm/x86_64/svm_idle_hlt_test.c | 89 +++++++++++++++++++ 10 files changed, 236 insertions(+), 3 deletions(-) create mode 100644 tools/testing/selftests/kvm/x86_64/svm_idle_hlt_test.c base-commit: d91a9cc16417b8247213a0144a1f0fd61dc855dd -- 2.34.1

8 months, 1 week

5
20
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[PATCH v3 00/11] cover-letter: iommufd: Add vIOMMU infrastructure (Part-1)

by Nicolin Chen

This series introduces a new vIOMMU infrastructure and related ioctls. IOMMUFD has been using the HWPT infrastructure for all cases, including a nested IO page table support. Yet, there're limitations for an HWPT-based structure to support some advanced HW-accelerated features, such as CMDQV on NVIDIA Grace, and HW-accelerated vIOMMU on AMD. Even for a multi-IOMMU environment, it is not straightforward for nested HWPTs to share the same parent HWPT (stage-2 IO pagetable), with the HWPT infrastructure alone: a parent HWPT typically hold one stage-2 IO pagetable and tag it with only one ID in the cache entries. When sharing one large stage-2 IO pagetable across physical IOMMU instances, that one ID may not always be available across all the IOMMU instances. In other word, it's ideal for SW to have a different container for the stage-2 IO pagetable so it can hold another ID that's available. For this "different container", add vIOMMU, an additional layer to hold extra virtualization information: _______________________________________________________________________ | iommufd (with vIOMMU) | | | | [5] | | _____________ | | | | | | [1] | vIOMMU | [4] [2] | | ________________ | | _____________ ________ | | | | | [3] | | | | | | | | IOAS |<---|(HWPT_PAGING)|<---| HWPT_NESTED |<--| DEVICE | | | |________________| |_____________| |_____________| |________| | | | | | | | |_________|____________________|__________________|_______________|_____| | | | | | ______v_____ ______v_____ ___v__ | PFN storage | (paging) | | (nested) | |struct| |------------>|iommu_domain|<----|iommu_domain|<----|device| |____________| |____________| |______| The vIOMMU object should be seen as a slice of a physical IOMMU instance that is passed to or shared with a VM. That can be some HW/SW resources: - Security namespace for guest owned ID, e.g. guest-controlled cache tags - Access to a sharable nesting parent pagetable across physical IOMMUs - Virtualization of various platforms IDs, e.g. RIDs and others - Delivery of paravirtualized invalidation - Direct assigned invalidation queues - Direct assigned interrupts - Non-affiliated event reporting On a multi-IOMMU system, the vIOMMU object must be instanced to the number of the physical IOMMUs that are passed to (via devices) a guest VM, while being able to hold the shareable parent HWPT. Each vIOMMU then just needs to allocate its own individual ID to tag its own cache: ---------------------------- ---------------- | | paging_hwpt0 | | hwpt_nested0 |--->| viommu0 ------------------ ---------------- | | IDx | ---------------------------- ---------------------------- ---------------- | | paging_hwpt0 | | hwpt_nested1 |--->| viommu1 ------------------ ---------------- | | IDy | ---------------------------- As an initial part-1, add IOMMUFD_CMD_VIOMMU_ALLOC ioctl for an allocation only. Later series will add more data structures and their ioctls. As for the implementation of the series, add an IOMMU_VIOMMU_TYPE_DEFAULT type for a core-allocated-core-managed vIOMMU object, allowing drivers to simply hook a default viommu ops for viommu-based invalidation alone. And add support for driver-specific type of vIOMMU allocation, and implement that in the ARM SMMUv3 driver for a real world use case. More vIOMMU-based structs and ioctls will be introduced in the follow-up series to support vDEVICE, vIRQ (vEVENT) and VQUEUE objects. Although we repurposed the vIOMMU object from an earlier RFC, just for a referece: https://lore.kernel.org/all/cover.1712978212.git.nicolinc@nvidia.com/ This series is on Github: https://github.com/nicolinc/iommufd/commits/iommufd_viommu_p1-v3 (paring QEMU branch for testing will be provided with the part2 series) Changelog v3 * Rebased on top of Jason's nesting v3 series https://lore.kernel.org/all/0-v3-e2e16cd7467f+2a6a1-smmuv3_nesting_jgg@nvid… * Split the series into smaller parts * Added Jason's Reviewed-by * Added back viommu->iommu_dev * Added support for driver-allocated vIOMMU v.s. core-allocated * Dropped arm_smmu_cache_invalidate_user * Added an iommufd_test_wait_for_users() in selftest * Reworked test code to make viommu an individual FIXTURE * Added missing TEST_LENGTH case for the new ioctl command v2 https://lore.kernel.org/all/cover.1724776335.git.nicolinc@nvidia.com/ * Limited vdev_id to one per idev * Added a rw_sem to protect the vdev_id list * Reworked driver-level APIs with proper lockings * Added a new viommu_api file for IOMMUFD_DRIVER config * Dropped useless iommu_dev point from the viommu structure * Added missing index numnbers to new types in the uAPI header * Dropped IOMMU_VIOMMU_INVALIDATE uAPI; Instead, reuse the HWPT one * Reworked mock_viommu_cache_invalidate() using the new iommu helper * Reordered details of set/unset_vdev_id handlers for proper lockings v1 https://lore.kernel.org/all/cover.1723061377.git.nicolinc@nvidia.com/ Thanks! Nicolin Nicolin Chen (11): iommufd: Move struct iommufd_object to public iommufd header iommufd: Rename _iommufd_object_alloc to iommufd_object_alloc_elm iommufd: Introduce IOMMUFD_OBJ_VIOMMU and its related struct iommufd/viommu: Add IOMMU_VIOMMU_ALLOC ioctl iommu: Pass in a viommu pointer to domain_alloc_user op iommufd: Allow pt_id to carry viommu_id for IOMMU_HWPT_ALLOC iommufd/selftest: Add refcount to mock_iommu_device iommufd/selftest: Add IOMMU_VIOMMU_TYPE_SELFTEST iommufd/selftest: Add IOMMU_VIOMMU_ALLOC test coverage Documentation: userspace-api: iommufd: Update vIOMMU iommu/arm-smmu-v3: Add IOMMU_VIOMMU_TYPE_ARM_SMMUV3 support drivers/iommu/iommufd/Makefile | 5 +- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 18 ++++ drivers/iommu/iommufd/iommufd_private.h | 23 ++--- drivers/iommu/iommufd/iommufd_test.h | 2 + include/linux/iommu.h | 15 +++ include/linux/iommufd.h | 52 +++++++++++ include/uapi/linux/iommufd.h | 54 +++++++++-- tools/testing/selftests/iommu/iommufd_utils.h | 28 ++++++ drivers/iommu/amd/iommu.c | 1 + .../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 24 +++++ drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 + drivers/iommu/intel/iommu.c | 1 + drivers/iommu/iommufd/hw_pagetable.c | 27 +++++- drivers/iommu/iommufd/main.c | 38 ++------ drivers/iommu/iommufd/selftest.c | 79 ++++++++++++++-- drivers/iommu/iommufd/viommu.c | 91 +++++++++++++++++++ drivers/iommu/iommufd/viommu_api.c | 57 ++++++++++++ tools/testing/selftests/iommu/iommufd.c | 84 +++++++++++++++++ Documentation/userspace-api/iommufd.rst | 66 +++++++++++++- 19 files changed, 602 insertions(+), 65 deletions(-) create mode 100644 drivers/iommu/iommufd/viommu.c create mode 100644 drivers/iommu/iommufd/viommu_api.c -- 2.43.0

8 months, 1 week

4
91
0 0

[PATCH bpf-next v1 0/4] Retire test_sock.c

by Jordan Rife

This patch series migrates test cases out of test_sock.c to prog_tests-style tests. It moves all BPF_CGROUP_INET4_POST_BIND and BPF_CGROUP_INET6_POST_BIND test cases into a new prog_test, sock_post_bind.c, while reimplementing all LOAD_REJECT test cases as verifier tests in progs/verifier_sock.c. Finally, it moves remaining BPF_CGROUP_INET_SOCK_CREATE test coverage into prog_tests/sock_create.c before retiring test_sock.c completely. Jordan Rife (4): selftests/bpf: Migrate *_POST_BIND test cases to prog_tests selftests/bpf: Migrate LOAD_REJECT test cases to prog_tests selftests/bpf: Migrate BPF_CGROUP_INET_SOCK_CREATE test cases to prog_tests selftests/bpf: Retire test_sock.c tools/testing/selftests/bpf/.gitignore | 1 - tools/testing/selftests/bpf/Makefile | 3 +- .../selftests/bpf/prog_tests/sock_create.c | 35 ++- .../sock_post_bind.c} | 251 ++++-------------- .../selftests/bpf/progs/verifier_sock.c | 60 +++++ 5 files changed, 142 insertions(+), 208 deletions(-) rename tools/testing/selftests/bpf/{test_sock.c => prog_tests/sock_post_bind.c} (64%) -- 2.47.0.rc1.288.g06298d1525-goog

8 months, 1 week

2
6
0 0

[PATCH v2] selftests/intel_pstate: fix operand expected

by Alessandro Zanni

This fix solves theses errors, when calling kselftest with targets "intel_pstate": ./run.sh: line 90: / 1000: syntax error: operand expected (error token is "/ 1000") ./run.sh: line 92: / 1000: syntax error: operand expected (error token is "/ 1000") To error was found by running tests manually with the command: make kselftest TARGETS=intel_pstate Signed-off-by: Alessandro Zanni <alessandro.zanni87(a)gmail.com> --- Notes: v2: removed debug echos tools/testing/selftests/intel_pstate/run.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/intel_pstate/run.sh b/tools/testing/selftests/intel_pstate/run.sh index e7008f614ad7..0c1b6c1308a4 100755 --- a/tools/testing/selftests/intel_pstate/run.sh +++ b/tools/testing/selftests/intel_pstate/run.sh @@ -87,9 +87,9 @@ mkt_freq=${_mkt_freq}0 # Get the ranges from cpupower _min_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $1 } ') -min_freq=$(($_min_freq / 1000)) +min_freq=$((_min_freq / 1000)) _max_freq=$(cpupower frequency-info -l | tail -1 | awk ' { print $2 } ') -max_freq=$(($_max_freq / 1000)) +max_freq=$((_max_freq / 1000)) [ $EVALUATE_ONLY -eq 0 ] && for freq in `seq $max_freq -100 $min_freq` -- 2.43.0

8 months, 1 week

2
5
0 0

[PATCH bpf-next v2 0/6] selftests/bpf: integrate test_tcp_check_syncookie.sh into test_progs

by Alexis Lothoré (eBPF Foundation)

Hello, this series aims to bring test_tcp_check_syncookie.sh scope into test_progs to make sure that the corresponding tests are also run automatically in CI. This script tests for bpf_tcp_{gen,check}_syncookie and bpf_skc_lookup_tcp, in different contexts (ipv4, v6 or dual, and with tc and xdp programs). Some other tests like btf_skc_cls_ingress have some overlapping tests with test_tcp_check_syncookie.sh, so this series moves the missing bits from test_tcp_check_syncookie.sh into btf_skc_cls_ingress, which is already integrated into test_progs. - the first three commits bring some minor improvements to btf_skc_cls_ingress without changing its testing scope - fourth and fifth commits bring test_tcp_check_syncookie.sh features into btf_skc_cls_ingress - last commit removes test_tcp_check_syncookie.sh The only topic for which I am not sure for this integration is the necessity or not to run the tests with different program types: test_tcp_check_syncookie.sh runs tests with both tc and xdp programs, but btf_skc_cls_ingress currently tests those helpers only with a tc program. Would it make sense to also make sure that btf_skc_cls_ingress is tested with all the programs types supported by those helpers ? The series has been tested both in CI and in a local x86_64 qemu environment: # ./test_progs -a btf_skc_cls_ingress #38/1 btf_skc_cls_ingress/conn_ipv4:OK #38/2 btf_skc_cls_ingress/conn_ipv6:OK #38/3 btf_skc_cls_ingress/conn_dual:OK #38/4 btf_skc_cls_ingress/syncookie_ipv4:OK #38/5 btf_skc_cls_ingress/syncookie_ipv6:OK #38/6 btf_skc_cls_ingress/syncookie_dual:OK #38 btf_skc_cls_ingress:OK Summary: 1/6 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore(a)bootlin.com> --- Changes in v2: - fix initial test author mail in Cc - Fix default cases in switches: indent, action - remove unneeded initializer - remove duplicate interface bring-up - remove unnecessary check and return in bpf program - Link to v1: https://lore.kernel.org/r/20241016-syncookie-v1-0-3b7a0de12153@bootlin.com --- Alexis Lothoré (eBPF Foundation) (6): selftests/bpf: factorize conn and syncookies tests in a single runner selftests/bpf: add missing ns cleanups in btf_skc_cls_ingress selftests/bpf: get rid of global vars in btf_skc_cls_ingress selftests/bpf: add ipv4 and dual ipv4/ipv6 support in btf_skc_cls_ingress selftests/bpf: test MSS value returned with bpf_tcp_gen_syncookie selftests/bpf: remove test_tcp_check_syncookie tools/testing/selftests/bpf/.gitignore | 1 - tools/testing/selftests/bpf/Makefile | 9 +- .../selftests/bpf/prog_tests/btf_skc_cls_ingress.c | 264 +++++++++++++-------- .../selftests/bpf/progs/test_btf_skc_cls_ingress.c | 82 ++++--- .../bpf/progs/test_tcp_check_syncookie_kern.c | 167 ------------- .../selftests/bpf/test_tcp_check_syncookie.sh | 85 ------- .../selftests/bpf/test_tcp_check_syncookie_user.c | 213 ----------------- 7 files changed, 217 insertions(+), 604 deletions(-) --- base-commit: 030207b7fce8bad6827615cfc2c6592916e2c336 change-id: 20241015-syncookie-ea7686264586 Best regards, -- Alexis Lothoré, Bootlin Embedded Linux and Kernel engineering https://bootlin.com

8 months, 1 week

2
7
0 0

[Bug Report] Wrong value of __NR_userfaultfd in asm-generic/unistd.h

by Muhammad Usama Anjum

Hi, The asm-generic/unistd.h file has wrong __NR_userfaultfd syscall number which doesn't even depend on the architecture. This has caused failure of a selftest which was fixed recently [1]. grep -rnIF "#define __NR_userfaultfd" tools/include/uapi/asm-generic/unistd.h:681:#define __NR_userfaultfd 282 arch/x86/include/generated/uapi/asm/unistd_32.h:374:#define __NR_userfaultfd 374 arch/x86/include/generated/uapi/asm/unistd_64.h:327:#define __NR_userfaultfd 323 arch/x86/include/generated/uapi/asm/unistd_x32.h:282:#define __NR_userfaultfd (__X32_SYSCALL_BIT + 323) arch/arm/include/generated/uapi/asm/unistd-eabi.h:347:#define __NR_userfaultfd (__NR_SYSCALL_BASE + 388) arch/arm/include/generated/uapi/asm/unistd-oabi.h:359:#define __NR_userfaultfd (__NR_SYSCALL_BASE + 388) include/uapi/asm-generic/unistd.h:681:#define __NR_userfaultfd 282 The number is dependent on the architecture. The above data shows that it is different for different arch: x86 374 x86_64 323 ARM 347/358 It seems include/uapi/asm-generic/unistd has wrong 282 value in it. Maybe I'm missing some context.. Please have a look at it. The __NR_userfaultfd was added to include/uapi/asm-generic/unistd.h in 09f7298100ea ("Subject: [PATCH] userfaultfd: register uapi generic syscall (aarch64)"). [1] https://lore.kernel.org/all/20240912103151.1520254-1-usama.anjum@collabora.… -- BR, /Muhammad Usama Anjum

8 months, 1 week

3
2
0 0

[PATCH] selftests: tc-testing: Fixed typo error

by Karan Sanghavi

Corrected the multiple and different typo errors in json files - "diffferent" is corrected to "different". - "muliple" and "miltiple" is corrected to "multiple". Signed-off-by: Karan Sanghavi <karansanghvi98(a)gmail.com> --- tools/testing/selftests/tc-testing/tc-tests/filters/basic.json | 6 +++--- tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json | 6 +++--- tools/testing/selftests/tc-testing/tc-tests/filters/flow.json | 2 +- tools/testing/selftests/tc-testing/tc-tests/filters/route.json | 2 +- 4 files changed, 8 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/tc-testing/tc-tests/filters/basic.json b/tools/testing/selftests/tc-testing/tc-tests/filters/basic.json index d1278de8ebc3..c9309a44a87e 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/filters/basic.json +++ b/tools/testing/selftests/tc-testing/tc-tests/filters/basic.json @@ -67,7 +67,7 @@ }, { "id": "4943", - "name": "Add basic filter with cmp ematch u32/link layer and miltiple actions", + "name": "Add basic filter with cmp ematch u32/link layer and multiple actions", "category": [ "filter", "basic" @@ -155,7 +155,7 @@ }, { "id": "32d8", - "name": "Add basic filter with cmp ematch u32/network layer and miltiple actions", + "name": "Add basic filter with cmp ematch u32/network layer and multiple actions", "category": [ "filter", "basic" @@ -243,7 +243,7 @@ }, { "id": "62d7", - "name": "Add basic filter with cmp ematch u32/transport layer and miltiple actions", + "name": "Add basic filter with cmp ematch u32/transport layer and multiple actions", "category": [ "filter", "basic" diff --git a/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json b/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json index 03723cf84379..35c9a7dbe1c4 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json +++ b/tools/testing/selftests/tc-testing/tc-tests/filters/cgroup.json @@ -67,7 +67,7 @@ }, { "id": "0234", - "name": "Add cgroup filter with cmp ematch u32/link layer and miltiple actions", + "name": "Add cgroup filter with cmp ematch u32/link layer and multiple actions", "category": [ "filter", "cgroup" @@ -155,7 +155,7 @@ }, { "id": "2733", - "name": "Add cgroup filter with cmp ematch u32/network layer and miltiple actions", + "name": "Add cgroup filter with cmp ematch u32/network layer and multiple actions", "category": [ "filter", "cgroup" @@ -1189,7 +1189,7 @@ }, { "id": "4319", - "name": "Replace cgroup filter with diffferent match", + "name": "Replace cgroup filter with different match", "category": [ "filter", "cgroup" diff --git a/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json b/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json index 58189327f644..996448afe31b 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json +++ b/tools/testing/selftests/tc-testing/tc-tests/filters/flow.json @@ -507,7 +507,7 @@ }, { "id": "4341", - "name": "Add flow filter with muliple ops", + "name": "Add flow filter with multiple ops", "category": [ "filter", "flow" diff --git a/tools/testing/selftests/tc-testing/tc-tests/filters/route.json b/tools/testing/selftests/tc-testing/tc-tests/filters/route.json index 8d8de8f65aef..05cedca67cca 100644 --- a/tools/testing/selftests/tc-testing/tc-tests/filters/route.json +++ b/tools/testing/selftests/tc-testing/tc-tests/filters/route.json @@ -111,7 +111,7 @@ }, { "id": "7994", - "name": "Add route filter with miltiple actions", + "name": "Add route filter with multiple actions", "category": [ "filter", "route" --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241017-multiple_spell_error-8b267ffffe47 Best regards, -- Karan Sanghavi <karansanghvi98(a)gmail.com>

8 months, 1 week

3
2
0 0

[PATCH v3 0/5] Increase mseal test coverage

by jeffxu＠chromium.org

From: Jeff Xu <jeffxu(a)chromium.org> This series increase the test coverage of mseal_test by: Add check for vma_size, prot, and error code for existing tests. Add more testcases for madvise, munmap, mmap and mremap to cover sealing in different scenarios. The increase test coverage hopefully help to prevent future regression. It doesn't change any existing mm api's semantics, i.e. it will pass on linux main and 6.10 branch. Note: in order to pass this test in mm-unstable, mm-unstable must have Liam's fix on mmap [1] [1] https://lore.kernel.org/linux-kselftest/vyllxuh5xbqmaoyl2mselebij5ox7cseekj… History: V3: - no-functional change, incooperate feedback from Pedro Falcato V2: - https://lore.kernel.org/linux-kselftest/20240829214352.963001-1-jeffxu@chro… - remove the mmap fix (Liam R. Howlett will fix it separately) - Add cover letter (Lorenzo Stoakes) - split the testcase for ease of review (Mark Brown) V1: - https://lore.kernel.org/linux-kselftest/20240828225522.684774-1-jeffxu@chro… Jeff Xu (5): selftests/mseal_test: Check vma_size, prot, error code. selftests/mseal: add sealed madvise type selftests/mseal: munmap across multiple vma ranges. selftests/mseal: add more tests for mmap selftests/mseal: add more tests for mremap tools/testing/selftests/mm/mseal_test.c | 830 ++++++++++++++++++++++-- 1 file changed, 763 insertions(+), 67 deletions(-) -- 2.46.0.469.g59c65b2a67-goog

8 months, 1 week

6
35
0 0

[PATCH] selftests: add file SLAB_TYPESAFE_BY_RCU recycling stressor

by Christian Brauner

Add a simple file stressor that lives directly in-tree. This will create a bunch of processes that each open 500 file descriptors and then use close_range() to close them all. Concurrently, other processes read /proc/<pid>/fd/ which rougly does f = fget_task_next(p, &fd); if (!f) break; data.mode = f->f_mode; fput(f); Which means that it'll try to get a reference to a file in another task's file descriptor table. Under heavy file load it is increasingly likely that the other task will manage to close @file and @file will be recycled due to SLAB_TYPEAFE_BY_RCU concurrently. This will trigger various warnings in the file reference counting code. Signed-off-by: Christian Brauner <brauner(a)kernel.org> --- This is in vfs.file unless I hear objections. --- .../testing/selftests/filesystems/.gitignore | 1 + tools/testing/selftests/filesystems/Makefile | 2 +- .../selftests/filesystems/file_stressor.c | 194 ++++++++++++++++++ 3 files changed, 196 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/filesystems/file_stressor.c diff --git a/tools/testing/selftests/filesystems/.gitignore b/tools/testing/selftests/filesystems/.gitignore index f0c0ff20d6cf..828b66a10c63 100644 --- a/tools/testing/selftests/filesystems/.gitignore +++ b/tools/testing/selftests/filesystems/.gitignore @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only dnotify_test devpts_pts +file_stressor diff --git a/tools/testing/selftests/filesystems/Makefile b/tools/testing/selftests/filesystems/Makefile index c647fd6a0446..66305fc34c60 100644 --- a/tools/testing/selftests/filesystems/Makefile +++ b/tools/testing/selftests/filesystems/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 CFLAGS += $(KHDR_INCLUDES) -TEST_GEN_PROGS := devpts_pts +TEST_GEN_PROGS := devpts_pts file_stressor TEST_GEN_PROGS_EXTENDED := dnotify_test include ../lib.mk diff --git a/tools/testing/selftests/filesystems/file_stressor.c b/tools/testing/selftests/filesystems/file_stressor.c new file mode 100644 index 000000000000..1136f93a9977 --- /dev/null +++ b/tools/testing/selftests/filesystems/file_stressor.c @@ -0,0 +1,194 @@ +// SPDX-License-Identifier: GPL-2.0 +#define _GNU_SOURCE +#define __SANE_USERSPACE_TYPES__ + +#include <fcntl.h> +#include <limits.h> +#include <pthread.h> +#include <sched.h> +#include <stdio.h> +#include <string.h> +#include <sys/stat.h> +#include <sys/mount.h> +#include <unistd.h> + +#include "../kselftest_harness.h" + +#include <linux/types.h> +#include <linux/mount.h> +#include <sys/syscall.h> + +static inline int sys_fsopen(const char *fsname, unsigned int flags) +{ + return syscall(__NR_fsopen, fsname, flags); +} + +static inline int sys_fsconfig(int fd, unsigned int cmd, const char *key, + const char *value, int aux) +{ + return syscall(__NR_fsconfig, fd, cmd, key, value, aux); +} + +static inline int sys_fsmount(int fd, unsigned int flags, + unsigned int attr_flags) +{ + return syscall(__NR_fsmount, fd, flags, attr_flags); +} + +#ifndef MOVE_MOUNT_F_EMPTY_PATH +#define MOVE_MOUNT_F_EMPTY_PATH 0x00000004 /* Empty from path permitted */ +#endif + +static inline int sys_move_mount(int from_dfd, const char *from_pathname, + int to_dfd, const char *to_pathname, + unsigned int flags) +{ + return syscall(__NR_move_mount, from_dfd, from_pathname, to_dfd, + to_pathname, flags); +} + +FIXTURE(file_stressor) { + int fd_tmpfs; + int nr_procs; + int max_fds; + pid_t *pids_openers; + pid_t *pids_getdents; + int *fd_proc_pid; +}; + +FIXTURE_SETUP(file_stressor) +{ + int fd_context; + + ASSERT_EQ(unshare(CLONE_NEWNS), 0); + ASSERT_EQ(mount(NULL, "/", NULL, MS_SLAVE | MS_REC, NULL), 0); + ASSERT_EQ(mkdir("/slab_typesafe_by_rcu", 0755), 0); + + fd_context = sys_fsopen("tmpfs", 0); + ASSERT_GE(fd_context, 0); + + ASSERT_EQ(sys_fsconfig(fd_context, FSCONFIG_CMD_CREATE, NULL, NULL, 0), 0); + self->fd_tmpfs = sys_fsmount(fd_context, 0, 0); + ASSERT_GE(self->fd_tmpfs, 0); + ASSERT_EQ(close(fd_context), 0); + + ASSERT_EQ(sys_move_mount(self->fd_tmpfs, "", -EBADF, "/slab_typesafe_by_rcu", MOVE_MOUNT_F_EMPTY_PATH), 0); + + self->nr_procs = sysconf(_SC_NPROCESSORS_ONLN); + self->pids_openers = malloc(sizeof(pid_t) * self->nr_procs); + ASSERT_NE(self->pids_openers, NULL); + self->pids_getdents = malloc(sizeof(pid_t) * self->nr_procs); + ASSERT_NE(self->pids_getdents, NULL); + self->fd_proc_pid = malloc(sizeof(int) * self->nr_procs); + ASSERT_NE(self->fd_proc_pid, NULL); + self->max_fds = 500; +} + +FIXTURE_TEARDOWN(file_stressor) +{ + for (int i = 0; i < self->nr_procs; i++) { + int wstatus; + pid_t pid; + + pid = waitpid(self->pids_openers[i], &wstatus, 0); + ASSERT_EQ(pid, self->pids_openers[i]); + ASSERT_TRUE(!WIFEXITED(wstatus) || !WIFSIGNALED(wstatus)); + + pid = waitpid(self->pids_getdents[i], &wstatus, 0); + ASSERT_EQ(pid, self->pids_getdents[i]); + ASSERT_TRUE(!WIFEXITED(wstatus) || !WIFSIGNALED(wstatus)); + } + free(self->pids_openers); + free(self->pids_getdents); + ASSERT_EQ(close(self->fd_tmpfs), 0); + + umount2("/slab_typesafe_by_rcu", 0); + ASSERT_EQ(rmdir("/slab_typesafe_by_rcu"), 0); +} + +TEST_F_TIMEOUT(file_stressor, slab_typesafe_by_rcu, 900 * 2) +{ + for (int i = 0; i < self->nr_procs; i++) { + pid_t pid_self; + + self->pids_openers[i] = fork(); + ASSERT_GE(self->pids_openers[i], 0); + + if (self->pids_openers[i] != 0) + continue; + + self->pids_openers[i] = getpid(); + for (;;) { + for (int i = 0; i < self->max_fds; i++) { + char path[PATH_MAX]; + int fd; + + sprintf(path, "/slab_typesafe_by_rcu/file-%d-%d", self->pids_openers[i], i); + fd = open(path, O_CREAT | O_RDONLY | O_CLOEXEC, 0644); + if (fd < 0) + continue; + } + + close_range(3, ~0U, 0); + } + + exit(0); + } + + for (int i = 0; i < self->nr_procs; i++) { + char path[PATH_MAX]; + + sprintf(path, "/proc/%d/fd/", self->pids_openers[i]); + self->fd_proc_pid[i] = open(path, O_DIRECTORY | O_RDONLY | O_CLOEXEC); + ASSERT_GE(self->fd_proc_pid[i], 0); + } + + for (int i = 0; i < self->nr_procs; i++) { + self->pids_getdents[i] = fork(); + ASSERT_GE(self->pids_getdents[i], 0); + + if (self->pids_getdents[i] != 0) + continue; + + self->pids_getdents[i] = getpid(); + for (;;) { + char ents[1024]; + ssize_t nr_read; + + /* + * Concurrently read /proc/<pid>/fd/ which rougly does: + * + * f = fget_task_next(p, &fd); + * if (!f) + * break; + * data.mode = f->f_mode; + * fput(f); + * + * Which means that it'll try to get a reference to a + * file in another task's file descriptor table. + * + * Under heavy file load it is increasingly likely that + * the other task will manage to close @file and @file + * is being recycled due to SLAB_TYPEAFE_BY_RCU + * concurrently. This will trigger various warnings in + * the file reference counting code. + */ + do { + nr_read = syscall(SYS_getdents64, self->fd_proc_pid[i], ents, sizeof(ents)); + } while (nr_read >= 0); + + lseek(self->fd_proc_pid[i], 0, SEEK_SET); + } + + exit(0); + } + + ASSERT_EQ(clock_nanosleep(CLOCK_MONOTONIC, 0, &(struct timespec){ .tv_sec = 900 /* 15 min */ }, NULL), 0); + + for (int i = 0; i < self->nr_procs; i++) { + kill(self->pids_openers[i], SIGKILL); + kill(self->pids_getdents[i], SIGKILL); + } +} + +TEST_HARNESS_MAIN -- 2.45.2

8 months, 1 week

1
0
0 0

[PATCH] selftests: kvm: Adds a judgment on the return value

by Liu Jing

The global variable errno is not recommended to be assigned, and rc in the function does not check its return value, so it is fixed Signed-off-by: Liu Jing <liujing(a)cmss.chinamobile.com> --- tools/testing/selftests/kvm/s390x/cmma_test.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/kvm/s390x/cmma_test.c b/tools/testing/selftests/kvm/s390x/cmma_test.c index e32dd59703a0..c59c21f28bbd 100644 --- a/tools/testing/selftests/kvm/s390x/cmma_test.c +++ b/tools/testing/selftests/kvm/s390x/cmma_test.c @@ -210,7 +210,7 @@ static int vm_get_cmma_bits(struct kvm_vm *vm, u64 flags, int *errno_out) struct kvm_s390_cmma_log args; int rc; - errno = 0; + *errno_out = 0; args = (struct kvm_s390_cmma_log){ .start_gfn = 0, @@ -219,8 +219,10 @@ static int vm_get_cmma_bits(struct kvm_vm *vm, u64 flags, int *errno_out) .values = (__u64)&cmma_value_buf[0] }; rc = __vm_ioctl(vm, KVM_S390_GET_CMMA_BITS, &args); + if (rc < 0) { + *errno_out = errno; + } - *errno_out = errno; return rc; } -- 2.27.0

8 months, 1 week

2
1
0 0

[PATCH bpf-next v2] bpf: handle MADV_PAGEOUT error in uprobe_multi.c

by Jason Xing

From: Jason Xing <kernelxing(a)tencent.com> When I compiled the tools/testing/selftests/bpf, the following error pops out: uprobe_multi.c: In function ‘trigger_uprobe’: uprobe_multi.c:109:26: error: ‘MADV_PAGEOUT’ undeclared (first use in this function); did you mean ‘MADV_RANDOM’? madvise(addr, page_sz, MADV_PAGEOUT); ^~~~~~~~~~~~ MADV_RANDOM Including the <linux/linux/mman.h> header file solves this compilation error. Signed-off-by: Jason Xing <kernelxing(a)tencent.com> --- v2 Link: https://lore.kernel.org/all/20241020031422.46894-1-kerneljasonxing@gmail.co… 1. handle it in a proper way --- tools/testing/selftests/bpf/uprobe_multi.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/bpf/uprobe_multi.c b/tools/testing/selftests/bpf/uprobe_multi.c index c7828b13e5ff..40231f02b95d 100644 --- a/tools/testing/selftests/bpf/uprobe_multi.c +++ b/tools/testing/selftests/bpf/uprobe_multi.c @@ -4,6 +4,7 @@ #include <string.h> #include <stdbool.h> #include <stdint.h> +#include <linux/mman.h> #include <sys/mman.h> #include <unistd.h> #include <sdt.h> -- 2.37.3

8 months, 1 week

2
5
0 0

[PATCH bpf-next] bpf: handle MADV_PAGEOUT error in uprobe_multi.c

by Jason Xing

From: Jason Xing <kernelxing(a)tencent.com> When I compiled the tools/testing/selftests/bpf, the following error pops out: uprobe_multi.c: In function ‘trigger_uprobe’: uprobe_multi.c:109:26: error: ‘MADV_PAGEOUT’ undeclared (first use in this function); did you mean ‘MADV_RANDOM’? madvise(addr, page_sz, MADV_PAGEOUT); ^~~~~~~~~~~~ MADV_RANDOM We can see MADV_PAGEOUT existing in mman-common.h on x86 arch, so including this header file solves this compilation error. Signed-off-by: Jason Xing <kernelxing(a)tencent.com> --- tools/testing/selftests/bpf/uprobe_multi.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/bpf/uprobe_multi.c b/tools/testing/selftests/bpf/uprobe_multi.c index c7828b13e5ff..b0e11ffe0e1c 100644 --- a/tools/testing/selftests/bpf/uprobe_multi.c +++ b/tools/testing/selftests/bpf/uprobe_multi.c @@ -5,6 +5,7 @@ #include <stdbool.h> #include <stdint.h> #include <sys/mman.h> +#include <mman-common.h> #include <unistd.h> #include <sdt.h> -- 2.37.3

8 months, 2 weeks

1
2
0 0

[PATCH v5 0/5] Add PSCI v1.3 SYSTEM_OFF2 support for hibernation

by David Woodhouse

The PSCI v1.3 spec (https://developer.arm.com/documentation/den0022) adds support for a SYSTEM_OFF2 function enabling a HIBERNATE_OFF state which is analogous to ACPI S4. This will allow hosting environments to determine that a guest is hibernated rather than just powered off, and ensure that they preserve the virtual environment appropriately to allow the guest to resume safely (or bump the hardware_signature in the FACS to trigger a clean reboot instead). This updates KVM to support advertising PSCI v1.3, and unconditionally enables the SYSTEM_OFF2 support when PSCI v1.3 is enabled. For the guest side, add a new SYS_OFF_MODE_POWER_OFF handler with higher priority than the EFI one, but which *only* triggers when there's a hibernation in progress. There are other ways to do this (see the commit message for more details) but this seemed like the simplest. Version 2 of the patch series splits out the psci.h definitions into a separate commit (a dependency for both the guest and KVM side), and adds definitions for the other new functions added in v1.3. It also moves the pKVM psci-relay support to a separate commit; although in arch/arm64/kvm that's actually about the *guest* side of SYSTEM_OFF2 (i.e. using it from the host kernel, relayed through nVHE). Version 3 dropped the KVM_CAP which allowed userspace to explicitly opt in to the new feature like with SYSTEM_SUSPEND, and makes it depend only on PSCI v1.3 being exposed to the guest. Version 4 is no longer RFC, as the PSCI v1.3 spec is finally published. Minor fixes from the last round of review, and an added KVM self test. Version 5 drops some of the changes which didn't make it to the final v1.3 spec, and cleans up a couple of places which still referred to it as 'alpha' or 'beta'. It also temporarily drops the guest-side patch to invoke SYSTEM_OFF2 for hibernation, pending confirmation that the final PSCI v1.3 spec just has a typo where it changed to saying that 0x1 should be passed to mean HIBERNATE_OFF, even though it's advertised as bit 0. That can be sent under separate cover, and perhaps should have been anyway. The change in question doesn't matter for any of the KVM patches, because we just treat SYSTEM_OFF2 like the existing SYSTEM_RESET2, setting a flag to indicate that it was a SYSTEM_OFF2 call, but not actually caring about the argument; that's for userspace to worry about. David Woodhouse (5): firmware/psci: Add definitions for PSCI v1.3 specification KVM: arm64: Add PSCI v1.3 SYSTEM_OFF2 function for hibernation KVM: arm64: Add support for PSCI v1.2 and v1.3 KVM: selftests: Add test for PSCI SYSTEM_OFF2 KVM: arm64: nvhe: Pass through PSCI v1.3 SYSTEM_OFF2 call Documentation/virt/kvm/api.rst | 11 +++++ arch/arm64/include/uapi/asm/kvm.h | 6 +++ arch/arm64/kvm/hyp/nvhe/psci-relay.c | 2 + arch/arm64/kvm/hypercalls.c | 2 + arch/arm64/kvm/psci.c | 43 ++++++++++++++++- include/kvm/arm_psci.h | 4 +- include/uapi/linux/psci.h | 5 ++ tools/testing/selftests/kvm/aarch64/psci_test.c | 61 +++++++++++++++++++++++++ 8 files changed, 132 insertions(+), 2 deletions(-)

8 months, 2 weeks

3
13
0 0

[PATCH bpf-next 0/6] selftests/bpf: integrate test_tcp_check_syncookie.sh into test_progs

by Alexis Lothoré (eBPF Foundation)

Hello, this series aims to bring test_tcp_check_syncookie.sh scope into test_progs to make sure that the corresponding tests are also run automatically in CI. This script tests for bpf_tcp_{gen,check}_syncookie and bpf_skc_lookup_tcp, in different contexts (ipv4, v6 or dual, and with tc and xdp programs). Some other tests like btf_skc_cls_ingress have some overlapping tests with test_tcp_check_syncookie.sh, so this series moves the missing bits from test_tcp_check_syncookie.sh into btf_skc_cls_ingress, which is already integrated into test_progs. - the first three commits bring some minor improvements to btf_skc_cls_ingress without changing its testing scope - fourth and fifth commits bring test_tcp_check_syncookie.sh features into btf_skc_cls_ingress - last commit removes test_tcp_check_syncookie.sh The only topic for which I am not sure for this integration is the necessity or not to run the tests with different program types: test_tcp_check_syncookie.sh runs tests with both tc and xdp programs, but btf_skc_cls_ingress currently tests those helpers only with a tc program. Would it make sense to also make sure that btf_skc_cls_ingress is tested with all the programs types supported by those helpers ? The series has been tested both in CI and in a local x86_64 qemu environment: # ./test_progs -a btf_skc_cls_ingress #38/1 btf_skc_cls_ingress/conn_ipv4:OK #38/2 btf_skc_cls_ingress/conn_ipv6:OK #38/3 btf_skc_cls_ingress/conn_dual:OK #38/4 btf_skc_cls_ingress/syncookie_ipv4:OK #38/5 btf_skc_cls_ingress/syncookie_ipv6:OK #38/6 btf_skc_cls_ingress/syncookie_dual:OK #38 btf_skc_cls_ingress:OK Summary: 1/6 PASSED, 0 SKIPPED, 0 FAILED Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore(a)bootlin.com> --- Alexis Lothoré (eBPF Foundation) (6): selftests/bpf: factorize conn and syncookies tests in a single runner selftests/bpf: add missing ns cleanups in btf_skc_cls_ingress selftests/bpf: get rid of global vars in btf_skc_cls_ingress selftests/bpf: add ipv4 and dual ipv4/ipv6 support in btf_skc_cls_ingress selftests/bpf: test MSS value returned with bpf_tcp_gen_syncookie selftests/bpf: remove test_tcp_check_syncookie tools/testing/selftests/bpf/.gitignore | 1 - tools/testing/selftests/bpf/Makefile | 9 +- .../selftests/bpf/prog_tests/btf_skc_cls_ingress.c | 265 +++++++++++++-------- .../selftests/bpf/progs/test_btf_skc_cls_ingress.c | 83 +++++-- .../bpf/progs/test_tcp_check_syncookie_kern.c | 167 ------------- .../selftests/bpf/test_tcp_check_syncookie.sh | 85 ------- .../selftests/bpf/test_tcp_check_syncookie_user.c | 213 ----------------- 7 files changed, 222 insertions(+), 601 deletions(-) --- base-commit: 030207b7fce8bad6827615cfc2c6592916e2c336 change-id: 20241015-syncookie-ea7686264586 Best regards, -- Alexis Lothoré, Bootlin Embedded Linux and Kernel engineering https://bootlin.com

8 months, 2 weeks

3
11
0 0

[PATCH net-next v9 00/23] Introducing OpenVPN Data Channel Offload

by Antonio Quartulli

This is the 9th version of the ovpn patchset. It re-introduces the RTNL Link ops and brings some changes to the Netlink API as well. Notably: * removed CMD_DEV_NEW/DEL from netlink API * re-added rtnl_link_ops.newlink implementation * removed all 'value-start: 0' from ovpn.yaml * added CMD_KEY_GET in Netlink API to retrieve non-sensible key data * used key-get in notify attribute of key-swap-nft * ensured that all netdev references are tracked * added IFF_NO_QUEUE to device priv_flags * set netdev devtype to ovpn_type * added implementation of .ndo_uninit * used workqueue to release socket (TCP detach may block) * removed inclusion of linux/version.h in main.c * removed commented inclusion of linux/rcupdate.h in main.c * fixed file path in MAINTAINERS file * properly sorted files in MAINTAINERS file Please note that patches previously reviewed by Andrew Lunn have retained the Reviewed-by tag as they have been simply rebased without major modifications. The latest code can also be found at: https://github.com/OpenVPN/linux-kernel-ovpn Thanks a lot! Best Regards, Antonio Quartulli OpenVPN Inc. --- Antonio Quartulli (23): netlink: add NLA_POLICY_MAX_LEN macro net: introduce OpenVPN Data Channel Offload (ovpn) ovpn: add basic netlink support ovpn: add basic interface creation/destruction/management routines ovpn: keep carrier always on ovpn: introduce the ovpn_peer object ovpn: introduce the ovpn_socket object ovpn: implement basic TX path (UDP) ovpn: implement basic RX path (UDP) ovpn: implement packet processing ovpn: store tunnel and transport statistics ovpn: implement TCP transport ovpn: implement multi-peer support ovpn: implement peer lookup logic ovpn: implement keepalive mechanism ovpn: add support for updating local UDP endpoint ovpn: add support for peer floating ovpn: implement peer add/dump/delete via netlink ovpn: implement key add/del/swap via netlink ovpn: kill key and notify userspace in case of IV exhaustion ovpn: notify userspace when a peer is deleted ovpn: add basic ethtool support testing/selftest: add test tool and scripts for ovpn module Documentation/netlink/specs/ovpn.yaml | 362 ++++ MAINTAINERS | 11 + drivers/net/Kconfig | 15 + drivers/net/Makefile | 1 + drivers/net/ovpn/Makefile | 22 + drivers/net/ovpn/bind.c | 54 + drivers/net/ovpn/bind.h | 117 ++ drivers/net/ovpn/crypto.c | 172 ++ drivers/net/ovpn/crypto.h | 141 ++ drivers/net/ovpn/crypto_aead.c | 356 ++++ drivers/net/ovpn/crypto_aead.h | 31 + drivers/net/ovpn/io.c | 461 +++++ drivers/net/ovpn/io.h | 25 + drivers/net/ovpn/main.c | 337 ++++ drivers/net/ovpn/main.h | 24 + drivers/net/ovpn/netlink-gen.c | 212 ++ drivers/net/ovpn/netlink-gen.h | 41 + drivers/net/ovpn/netlink.c | 1039 ++++++++++ drivers/net/ovpn/netlink.h | 18 + drivers/net/ovpn/ovpnstruct.h | 61 + drivers/net/ovpn/packet.h | 40 + drivers/net/ovpn/peer.c | 1197 ++++++++++++ drivers/net/ovpn/peer.h | 165 ++ drivers/net/ovpn/pktid.c | 130 ++ drivers/net/ovpn/pktid.h | 87 + drivers/net/ovpn/proto.h | 104 + drivers/net/ovpn/skb.h | 61 + drivers/net/ovpn/socket.c | 178 ++ drivers/net/ovpn/socket.h | 55 + drivers/net/ovpn/stats.c | 21 + drivers/net/ovpn/stats.h | 47 + drivers/net/ovpn/tcp.c | 505 +++++ drivers/net/ovpn/tcp.h | 44 + drivers/net/ovpn/udp.c | 406 ++++ drivers/net/ovpn/udp.h | 26 + include/net/netlink.h | 1 + include/uapi/linux/if_link.h | 15 + include/uapi/linux/ovpn.h | 109 ++ include/uapi/linux/udp.h | 1 + tools/net/ynl/ynl-gen-c.py | 4 +- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/net/ovpn/.gitignore | 2 + tools/testing/selftests/net/ovpn/Makefile | 16 + tools/testing/selftests/net/ovpn/config | 10 + tools/testing/selftests/net/ovpn/data-test-tcp.sh | 9 + tools/testing/selftests/net/ovpn/data-test.sh | 157 ++ tools/testing/selftests/net/ovpn/data64.key | 5 + tools/testing/selftests/net/ovpn/float-test.sh | 122 ++ tools/testing/selftests/net/ovpn/ovpn-cli.c | 2136 +++++++++++++++++++++ tools/testing/selftests/net/ovpn/tcp_peers.txt | 5 + tools/testing/selftests/net/ovpn/udp_peers.txt | 5 + 51 files changed, 9163 insertions(+), 1 deletion(-) --- base-commit: 6d858708d465669ba7de17e9c5691eb4019166e8 change-id: 20241002-b4-ovpn-eeee35c694a2 Best regards, -- Antonio Quartulli <antonio(a)openvpn.net>

8 months, 2 weeks

4
32
0 0

[PATCH] selftests/net: Add missing va_end in test_snprintf

by Liu Jing

There is no va_end after va_copy, just add it. Signed-off-by: Liu Jing <liujing_yewu(a)cmss.chinamobile.com> Signed-off-by: Liu Jing <liujing(a)cmss.chinamobile.com> --- tools/testing/selftests/net/tcp_ao/lib/aolib.h | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/net/tcp_ao/lib/aolib.h b/tools/testing/selftests/net/tcp_ao/lib/aolib.h index db44e77428dd..5db2f65cddc4 100644 --- a/tools/testing/selftests/net/tcp_ao/lib/aolib.h +++ b/tools/testing/selftests/net/tcp_ao/lib/aolib.h @@ -46,6 +46,7 @@ static inline char *test_snprintf(const char *fmt, va_list vargs) va_copy(tmp, vargs); n = vsnprintf(ret, size, fmt, tmp); + va_end(tmp); if (n < 0) return NULL; -- 2.27.0

8 months, 2 weeks

2
1
0 0

[GIT PULL] Kselftest fixes update for Linux 6.12-rc4

by Shuah Khan

Hi Linus, Please pull the following kselftest fixes update for Linux 6.12-rc4. -- fixes test makefile to install tests directory without which the test fails with errors. diff is attached. thanks, -- Shuah ---------------------------------------------------------------- The following changes since commit 4ee5ca9a29384fcf3f18232fdf8474166dea8dca: ftrace/selftest: Test combination of function_graph tracer and function profiler are available in the Git repository at: git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest tags/linux_kselftest-fixes-6.12-rc4 for you to fetch changes up to fe05c40ca9c18cfdb003f639a30fc78a7ab49519: selftest: hid: add the missing tests directory (2024-10-16 15:55:14 -0600) ---------------------------------------------------------------- linux_kselftest-fixes-6.12-rc4 kselftest fixes for Linux 6.12-rc4 -- fixes test makefile to install tests directory without which the test fails with errors. ---------------------------------------------------------------- Yun Lu (1): selftest: hid: add the missing tests directory tools/testing/selftests/hid/Makefile | 1 + 1 file changed, 1 insertion(+) ----------------------------------------------------------------

8 months, 2 weeks

2
1
0 0

[PATCH 0/4] implement lightweight guard pages

by Lorenzo Stoakes

Userland library functions such as allocators and threading implementations often require regions of memory to act as 'guard pages' - mappings which, when accessed, result in a fatal signal being sent to the accessing process. The current means by which these are implemented is via a PROT_NONE mmap() mapping, which provides the required semantics however incur an overhead of a VMA for each such region. With a great many processes and threads, this can rapidly add up and incur a significant memory penalty. It also has the added problem of preventing merges that might otherwise be permitted. This series takes a different approach - an idea suggested by Vlasimil Babka (and before him David Hildenbrand and Jann Horn - perhaps more - the provenance becomes a little tricky to ascertain after this - please forgive any omissions!) - rather than locating the guard pages at the VMA layer, instead placing them in page tables mapping the required ranges. Early testing of the prototype version of this code suggests a 5 times speed up in memory mapping invocations (in conjunction with use of process_madvise()) and a 13% reduction in VMAs on an entirely idle android system and unoptimised code. We expect with optimisation and a loaded system with a larger number of guard pages this could significantly increase, but in any case these numbers are encouraging. This way, rather than having separate VMAs specifying which parts of a range are guard pages, instead we have a VMA spanning the entire range of memory a user is permitted to access and including ranges which are to be 'guarded'. After mapping this, a user can specify which parts of the range should result in a fatal signal when accessed. By restricting the ability to specify guard pages to memory mapped by existing VMAs, we can rely on the mappings being torn down when the mappings are ultimately unmapped and everything works simply as if the memory were not faulted in, from the point of view of the containing VMAs. This mechanism in effect poisons memory ranges similar to hardware memory poisoning, only it is an entirely software-controlled form of poisoning. Any poisoned region of memory is also able to 'unpoisoned', that is, to have its poison markers removed. The mechanism is implemented via madvise() behaviour - MADV_GUARD_POISON which simply poisons ranges - and MADV_GUARD_UNPOISON - which clears this poisoning. Poisoning can be performed across multiple VMAs and any existing mappings will be cleared, that is zapped, before installing the poisoned page table mappings. There is no concept of 'nested' poisoning, multiple attempts to poison a range will, after the first poisoning, have no effect. Importantly, unpoisoning of poisoned ranges has no effect on non-poisoned memory, so a user can safely unpoison a range of memory and clear only poison page table mappings leaving the rest intact. The actual mechanism by which the page table entries are specified makes use of existing logic - PTE markers, which are used for the userfaultfd UFFDIO_POISON mechanism. Unfortunately PTE_MARKER_POISONED is not suited for the guard page mechanism as it results in VM_FAULT_HWPOISON semantics in the fault handler, so we add our own specific PTE_MARKER_GUARD and adapt existing logic to handle it. We also extend the generic page walk mechanism to allow for installation of PTEs (carefully restricted to memory management logic only to prevent unwanted abuse). We ensure that zapping performed by, for instance, MADV_DONTNEED, does not remove guard poison markers, nor does forking (except when VM_WIPEONFORK is specified for a VMA which implies a total removal of memory characteristics). It's important to note that the guard page implementation is emphatically NOT a security feature, so a user can remove the poisoning if they wish. We simply implement it in such a way as to provide the least surprising behaviour. An extensive set of self-tests are provided which ensure behaviour is as expected and additionally self-documents expected behaviour of poisoned ranges. Suggested-by: Vlastimil Babka <vbabka(a)suze.cz> Suggested-by: Jann Horn <jannh(a)google.com> Suggested-by: David Hildenbrand <david(a)redhat.com> v1 * Un-RFC'd as appears no major objections to approach but rather debate on implementation. * Fixed issue with arches which need mmu_context.h and tlbfush.h. header imports in pagewalker logic to be able to use update_mmu_cache() as reported by the kernel test bot. * Added comments in page walker logic to clarify who can use ops->install_pte and why as well as adding a check_ops_valid() helper function, as suggested by Christoph. * Pass false in full parameter in pte_clear_not_present_full() as suggested by Jann. * Stopped erroneously requiring a write lock for the poison operation as suggested by Jann and Suren. * Moved anon_vma_prepare() to the start of madvise_guard_poison() to be consistent with how this is used elsewhere in the kernel as suggested by Jann. * Avoid returning -EAGAIN if we are raced on page faults, just keep looping and duck out if a fatal signal is pending or a conditional reschedule is needed, as suggested by Jann. * Avoid needlessly splitting huge PUDs and PMDs by specifying ACTION_CONTINUE, as suggested by Jann. RFC https://lore.kernel.org/all/cover.1727440966.git.lorenzo.stoakes@oracle.com/ Lorenzo Stoakes (4): mm: pagewalk: add the ability to install PTEs mm: add PTE_MARKER_GUARD PTE marker mm: madvise: implement lightweight guard page mechanism selftests/mm: add self tests for guard page feature arch/alpha/include/uapi/asm/mman.h | 3 + arch/mips/include/uapi/asm/mman.h | 3 + arch/parisc/include/uapi/asm/mman.h | 3 + arch/xtensa/include/uapi/asm/mman.h | 3 + include/linux/mm_inline.h | 2 +- include/linux/pagewalk.h | 18 +- include/linux/swapops.h | 26 +- include/uapi/asm-generic/mman-common.h | 3 + mm/hugetlb.c | 3 + mm/internal.h | 6 + mm/madvise.c | 168 ++++ mm/memory.c | 18 +- mm/mprotect.c | 3 +- mm/mseal.c | 1 + mm/pagewalk.c | 200 ++-- tools/testing/selftests/mm/.gitignore | 1 + tools/testing/selftests/mm/Makefile | 1 + tools/testing/selftests/mm/guard-pages.c | 1168 ++++++++++++++++++++++ 18 files changed, 1564 insertions(+), 66 deletions(-) create mode 100644 tools/testing/selftests/mm/guard-pages.c -- 2.46.2

8 months, 2 weeks

3
15
0 0

[PATCH 0/3] selftests/mm: revert pthread_barrier change and

by Edward Liaw

On Android arm, pthread_create followed by a fork caused a deadlock in the case where the fork required work to be completed by the created thread. The previous patches incorrectly assumed that the parent would always initialize the pthread_barrier for the child thread. This reverts the change and replaces the fix for wp-fork-with-event with the original use of atomic_bool. Edward Liaw (3): Revert "selftests/mm: fix deadlock for fork after pthread_create on ARM" Revert "selftests/mm: replace atomic_bool with pthread_barrier_t" selftests/mm: fix deadlock for fork after pthread_create with atomic_bool tools/testing/selftests/mm/uffd-common.c | 5 ++-- tools/testing/selftests/mm/uffd-common.h | 3 ++- tools/testing/selftests/mm/uffd-unit-tests.c | 24 ++++++++------------ 3 files changed, 14 insertions(+), 18 deletions(-) -- 2.47.0.105.g07ac214952-goog

8 months, 2 weeks

2
4
0 0

[PATCH V3 00/15] selftests/resctrl: Support diverse platforms with MBM and MBA tests

by Reinette Chatre

Changes since V2: - V2: https://lore.kernel.org/all/cover.1726164080.git.reinette.chatre@intel.com/ - Add fix to protect against buffer overflow when parsing text from sysfs files. - Add cleanup patch to address use of magic constants as pointed out by Ilpo. - Add Reviewed-by tags where received, except for "selftests/resctrl: Use cache size to determine "fill_buf" buffer size" that changed too much since receiving the Reviewed-by tag. - Please see individual patches for detailed changes. Changes since V1: - V1: https://lore.kernel.org/cover.1724970211.git.reinette.chatre@intel.com/ - V2 contains the same general solutions to stated problem as V1 but these are now preceded by more fixes (patches 1 to 5) and improved robustness (patches 6 to 9) to existing tests before the series gets back to solving the original problem with more confidence in patches 10 to 13. - The posibility of making "memflush = false" for CMT test was discussed during V1. Modifying this setting does not have a significant impact on the observed results that are already well within acceptable range and this version thus keeps original default. If performance was a goal it may be possible to do further experimentation where "memflush = false" could eliminate the need for the sleep(1) within the test wrapper, but improving the performance is not a goal of this work. - (New) Support what seems to be unintended ability for user space to provide parameters to "fill_buf" by making the parsing robust and only support changing parameters that are supported to be changed. Drop support for "write" operation since it has never been measured. - (New) Improve wraparound handling. (Ilpo) - (New) A couple of new fixes addressing issues discovered during development. - (Change from V1) To support fill_buf parameters provided by user space as well as test specific fill_buf parameters struct fill_buf_param is no longer just a member of struct resctrl_val_param, instead there could be at most two instances of struct fill_buf_param, the immutable parameters provided by user space and the parameters used by individual tests. (Ilpo) - Please see individual patches for detailed changes. V1 cover: The resctrl selftests for Memory Bandwidth Allocation (MBA) and Memory Bandwidth Monitoring (MBM) are failing on some (for example [1]) Emerald Rapids systems. The test failures result from the following two properties of these systems: 1) Emerald Rapids systems can have up to 320MB L3 cache. The resctrl MBA and MBM selftests measure memory traffic for which a hardcoded 250MB buffer has been sufficient so far. On platforms with L3 cache larger than the buffer, the buffer fits in the L3 cache and thus no/very little memory traffic is generated during the "memory bandwidth" tests. 2) Some platform features, for example RAS features or memory performance features that generate memory traffic may drive accesses that are counted differently by performance counters and MBM respectively, for instance generating "overhead" traffic which is not counted against any specific RMID. Until now these counting differences have always been "in the noise". On Emerald Rapids systems the maximum MBA throttling (10% memory bandwidth) throttles memory bandwidth to where memory accesses by these other platform features push the memory bandwidth difference between memory controller performance counters and resctrl (MBM) beyond the tests' hardcoded tolerance. Make the tests more robust against platform variations: 1) Let the buffer used by memory bandwidth tests be guided by the size of the L3 cache. 2) Larger buffers require longer initialization time before the buffer can be used to measurement. Rework the tests to ensure that buffer initialization is complete before measurements start. 3) Do not compare performance counters and MBM measurements at low bandwidth. The value of "low" is hardcoded to 750MiB based on measurements on Emerald Rapids, Sapphire Rapids, and Ice Lake systems. This limit is not applicable to AMD systems since it only applies to the MBA and MBM tests that are isolated to Intel. [1] https://ark.intel.com/content/www/us/en/ark/products/237261/intel-xeon-plat… Reinette Chatre (15): selftests/resctrl: Make functions only used in same file static selftests/resctrl: Print accurate buffer size as part of MBM results selftests/resctrl: Fix memory overflow due to unhandled wraparound selftests/resctrl: Protect against array overrun during iMC config parsing selftests/resctrl: Protect against array overflow when reading strings selftests/resctrl: Make wraparound handling obvious selftests/resctrl: Remove "once" parameter required to be false selftests/resctrl: Only support measured read operation selftests/resctrl: Remove unused measurement code selftests/resctrl: Make benchmark parameter passing robust selftests/resctrl: Ensure measurements skip initialization of default benchmark selftests/resctrl: Use cache size to determine "fill_buf" buffer size selftests/resctrl: Do not compare performance counters and resctrl at low bandwidth selftests/resctrl: Keep results from first test run selftests/resctrl: Replace magic constants used as array size tools/testing/selftests/resctrl/cmt_test.c | 37 +- tools/testing/selftests/resctrl/fill_buf.c | 45 +- tools/testing/selftests/resctrl/mba_test.c | 54 ++- tools/testing/selftests/resctrl/mbm_test.c | 37 +- tools/testing/selftests/resctrl/resctrl.h | 79 +++- .../testing/selftests/resctrl/resctrl_tests.c | 95 +++- tools/testing/selftests/resctrl/resctrl_val.c | 447 +++++------------- tools/testing/selftests/resctrl/resctrlfs.c | 19 +- 8 files changed, 354 insertions(+), 459 deletions(-) -- 2.46.2

8 months, 2 weeks

2
24
0 0

[PATCH 0/2] selftests/mm: fix deadlock after pthread_create

by Edward Liaw

On Android arm, pthread_create followed by a fork caused a deadlock in the case where the fork required work to be completed by the created thread. Updated the synchronization primitive to use pthread_barrier instead of atomic_bool. Applied the same fix to the wp-fork-with-event test. Edward Liaw (2): selftests/mm: replace atomic_bool with pthread_barrier_t selftests/mm: fix deadlock for fork after pthread_create on ARM tools/testing/selftests/mm/uffd-common.c | 5 +++-- tools/testing/selftests/mm/uffd-common.h | 3 +-- tools/testing/selftests/mm/uffd-unit-tests.c | 21 ++++++++++++++------ 3 files changed, 19 insertions(+), 10 deletions(-) -- 2.46.1.824.gd892dcdcdd-goog

8 months, 2 weeks

4
6
0 0

[PATCH] kunit: tool: catch warnings generated by the kernel

by Jason Gunthorpe

If the kunit being run generates a WARN for some reason kunit.py ignores it and declares the tested PASSED. This is very much not desirable, as tests that are hitting WARN's are probably actually failing. Take the simple approach to reducing this by setting panic_on_warn when running the kernel. The kernel crashes and kunit.py shows the WARN and reports the test fails. Signed-off-by: Jason Gunthorpe <jgg(a)nvidia.com> --- tools/testing/kunit/kunit_kernel.py | 2 ++ 1 file changed, 2 insertions(+) I saw there was an earlier series working to make tests that deliberately made WARNs not do that, so this would be consistent with that idea, tests should not make WARNs, and WARNs should not be ignored.. diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py index 61931c4926fd66..7a4228568dd73c 100644 --- a/tools/testing/kunit/kunit_kernel.py +++ b/tools/testing/kunit/kunit_kernel.py @@ -342,6 +342,8 @@ class LinuxSourceTree: if filter_action: args.append('kunit.filter_action=' + filter_action) args.append('kunit.enable=1') + args.append('panic_on_warn=1') + args.append('panic=-1') process = self._ops.start(args, build_dir) assert process.stdout is not None # tell mypy it's set base-commit: 2872987b1d009df556c0061ecdeede6a5f9bf42c -- 2.46.2

8 months, 2 weeks

1
0
0 0

[PATCH 0/2] selftest: rtc: Add rtc feature detection and rtc file check

by Joseph Jang

1. In order to make rtctest more explicit and robust, we propose to use RTC_PARAM_GET ioctl interface to check rtc alarm feature state before running alarm related tests. 2. The rtctest requires the read permission on /dev/rtc0. The rtctest will be skipped if the /dev/rtc0 is not readable. Joseph Jang (2): selftest: rtc: Add to check rtc alarm status for alarm related test selftest: rtc: Check if could access /dev/rtc0 before testing tools/testing/selftests/rtc/Makefile | 2 +- tools/testing/selftests/rtc/rtctest.c | 71 ++++++++++++++++++++++++++- 2 files changed, 71 insertions(+), 2 deletions(-) -- 2.34.1

8 months, 2 weeks

3
15
0 0

[PATCH v9 9/9] selftests/pcie_bwctrl: Create selftests

by Ilpo Järvinen

Create selftests for PCIe BW control through the PCIe cooling device sysfs interface. First, the BW control selftest finds the PCIe Port to test with. By default, the PCIe Port with the highest Link Speed is selected but another PCIe Port can be provided with -d parameter. The actual test steps the cur_state of the cooling device one-by-one from max_state to what the cur_state was initially. The speed change is confirmed by observing the current_link_speed for the corresponding PCIe Port. Signed-off-by: Ilpo Järvinen <ilpo.jarvinen(a)linux.intel.com> Reviewed-by: Jonathan Cameron <Jonathan.Cameron(a)huawei.com> --- MAINTAINERS | 1 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/pcie_bwctrl/Makefile | 2 + .../pcie_bwctrl/set_pcie_cooling_state.sh | 122 ++++++++++++++++++ .../selftests/pcie_bwctrl/set_pcie_speed.sh | 67 ++++++++++ 5 files changed, 193 insertions(+) create mode 100644 tools/testing/selftests/pcie_bwctrl/Makefile create mode 100755 tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh create mode 100755 tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh diff --git a/MAINTAINERS b/MAINTAINERS index 393ed7ce5ea1..d7ffef4382df 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -17940,6 +17940,7 @@ S: Supported F: drivers/pci/pcie/bwctrl.c F: drivers/thermal/pcie_cooling.c F: include/linux/pci-bwctrl.h +F: tools/testing/selftests/pcie_bwctrl/ PCIE DRIVER FOR AMAZON ANNAPURNA LABS M: Jonathan Chocron <jonnyc(a)amazon.com> diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b38199965f99..7181756f47ff 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -72,6 +72,7 @@ TARGETS += net/packetdrill TARGETS += net/rds TARGETS += net/tcp_ao TARGETS += nsfs +TARGETS += pcie_bwctrl TARGETS += perf_events TARGETS += pidfd TARGETS += pid_namespace diff --git a/tools/testing/selftests/pcie_bwctrl/Makefile b/tools/testing/selftests/pcie_bwctrl/Makefile new file mode 100644 index 000000000000..3e84e26341d1 --- /dev/null +++ b/tools/testing/selftests/pcie_bwctrl/Makefile @@ -0,0 +1,2 @@ +TEST_PROGS = set_pcie_cooling_state.sh +include ../lib.mk diff --git a/tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh b/tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh new file mode 100755 index 000000000000..9df606552af3 --- /dev/null +++ b/tools/testing/selftests/pcie_bwctrl/set_pcie_cooling_state.sh @@ -0,0 +1,122 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-or-later + +SYSFS= +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +retval=0 +skipmsg="skip all tests:" + +PCIEPORTTYPE="PCIe_Port_Link_Speed" + +prerequisite() +{ + local ports + + if [ $UID != 0 ]; then + echo $skipmsg must be run as root >&2 + exit $ksft_skip + fi + + SYSFS=`mount -t sysfs | head -1 | awk '{ print $3 }'` + + if [ ! -d "$SYSFS" ]; then + echo $skipmsg sysfs is not mounted >&2 + exit $ksft_skip + fi + + if ! ls $SYSFS/class/thermal/cooling_device* > /dev/null 2>&1; then + echo $skipmsg thermal cooling devices missing >&2 + exit $ksft_skip + fi + + ports=`grep -e "^$PCIEPORTTYPE" $SYSFS/class/thermal/cooling_device*/type | wc -l` + if [ $ports -eq 0 ]; then + echo $skipmsg pcie cooling devices missing >&2 + exit $ksft_skip + fi +} + +testport= +find_pcie_port() +{ + local patt="$1" + local pcieports + local max + local cur + local delta + local bestdelta=-1 + + pcieports=`grep -l -F -e "$patt" /sys/class/thermal/cooling_device*/type` + if [ -z "$pcieports" ]; then + return + fi + pcieports=${pcieports//\/type/} + # Find the port with the highest PCIe Link Speed + for port in $pcieports; do + max=`cat $port/max_state` + cur=`cat $port/cur_state` + delta=$((max-cur)) + if [ $delta -gt $bestdelta ]; then + testport="$port" + bestdelta=$delta + fi + done +} + +sysfspcidev= +find_sysfs_pci_dev() +{ + local typefile="$1/type" + local pcidir + + pcidir="$SYSFS/bus/pci/devices/`sed -e "s|^${PCIEPORTTYPE}_||g" $typefile`" + + if [ -r "$pcidir/current_link_speed" ]; then + sysfspcidev="$pcidir/current_link_speed" + fi +} + +usage() +{ + echo "Usage $0 [ -d dev ]" + echo -e "\t-d: PCIe port BDF string (e.g., 0000:00:04.0)" +} + +pattern="$PCIEPORTTYPE" +parse_arguments() +{ + while getopts d:h opt; do + case $opt in + h) + usage "$0" + exit 0 + ;; + d) + pattern="$PCIEPORTTYPE_$OPTARG" + ;; + *) + usage "$0" + exit 0 + ;; + esac + done +} + +parse_arguments "$@" +prerequisite +find_pcie_port "$pattern" +if [ -z "$testport" ]; then + echo $skipmsg "pcie cooling device not found from sysfs" >&2 + exit $ksft_skip +fi +find_sysfs_pci_dev "$testport" +if [ -z "$sysfspcidev" ]; then + echo $skipmsg "PCIe port device not found from sysfs" >&2 + exit $ksft_skip +fi + +./set_pcie_speed.sh "$testport" "$sysfspcidev" +retval=$? + +exit $retval diff --git a/tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh b/tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh new file mode 100755 index 000000000000..584596949312 --- /dev/null +++ b/tools/testing/selftests/pcie_bwctrl/set_pcie_speed.sh @@ -0,0 +1,67 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0-or-later + +set -e + +TESTNAME=set_pcie_speed + +declare -a PCIELINKSPEED=( + "2.5 GT/s PCIe" + "5.0 GT/s PCIe" + "8.0 GT/s PCIe" + "16.0 GT/s PCIe" + "32.0 GT/s PCIe" + "64.0 GT/s PCIe" +) + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 +retval=0 + +coolingdev="$1" +statefile="$coolingdev/cur_state" +maxfile="$coolingdev/max_state" +linkspeedfile="$2" + +oldstate=`cat $statefile` +maxstate=`cat $maxfile` + +set_state() +{ + local state=$1 + local linkspeed + local expected_linkspeed + + echo $state > $statefile + + sleep 1 + + linkspeed="`cat $linkspeedfile`" + expected_linkspeed=$((maxstate-state)) + expected_str="${PCIELINKSPEED[$expected_linkspeed]}" + if [ ! "${expected_str}" = "${linkspeed}" ]; then + echo "$TESTNAME failed: expected: ${expected_str}; got ${linkspeed}" + retval=1 + fi +} + +cleanup_skip () +{ + set_state $oldstate + exit $ksft_skip +} + +trap cleanup_skip EXIT + +echo "$TESTNAME: testing states $maxstate .. $oldstate with $coolingdev" +for i in $(seq $maxstate -1 $oldstate); do + set_state "$i" +done + +trap EXIT +if [ $retval -eq 0 ]; then + echo "$TESTNAME [PASS]" +else + echo "$TESTNAME [FAIL]" +fi +exit $retval -- 2.39.5

8 months, 2 weeks

1
0
0 0

[PATCH] selftests: netfilter: remove unused rplnlh parameter

by Liu Jing

The rplnlh parameter is not used in many functions, so delete it. Signed-off-by: Liu Jing <liujing(a)cmss.chinamobile.com> --- tools/testing/selftests/net/netfilter/conntrack_dump_flush.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c b/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c index bd9317bf5ada..e03ddc60b5d4 100644 --- a/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c +++ b/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c @@ -96,7 +96,6 @@ static int conntrack_data_insert(struct mnl_socket *sock, struct nlmsghdr *nlh, uint16_t zone) { char buf[MNL_SOCKET_BUFFER_SIZE]; - struct nlmsghdr *rplnlh; unsigned int portid; int err, ret; @@ -212,7 +211,7 @@ static int count_entries(const struct nlmsghdr *nlh, void *data) static int conntracK_count_zone(struct mnl_socket *sock, uint16_t zone) { char buf[MNL_SOCKET_BUFFER_SIZE]; - struct nlmsghdr *nlh, *rplnlh; + struct nlmsghdr *nlh; struct nfgenmsg *nfh; struct nlattr *nest; unsigned int portid; @@ -259,7 +258,7 @@ static int conntracK_count_zone(struct mnl_socket *sock, uint16_t zone) static int conntrack_flush_zone(struct mnl_socket *sock, uint16_t zone) { char buf[MNL_SOCKET_BUFFER_SIZE]; - struct nlmsghdr *nlh, *rplnlh; + struct nlmsghdr *nlh; struct nfgenmsg *nfh; struct nlattr *nest; unsigned int portid; -- 2.27.0

8 months, 2 weeks

2
1
0 0

[PATCH net-next v22 11/14] mm: page_frag: add testing for the newly added prepare API

by Yunsheng Lin

Add testing for the newly added prepare API, for both aligned and non-aligned API, also probe API is also tested along with prepare API. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> --- .../selftests/mm/page_frag/page_frag_test.c | 76 +++++++++++++++++-- tools/testing/selftests/mm/run_vmtests.sh | 4 + tools/testing/selftests/mm/test_page_frag.sh | 27 +++++++ 3 files changed, 102 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index e806c1866e36..1e47e9ad66f0 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -32,6 +32,10 @@ static bool test_align; module_param(test_align, bool, 0); MODULE_PARM_DESC(test_align, "use align API for testing"); +static bool test_prepare; +module_param(test_prepare, bool, 0); +MODULE_PARM_DESC(test_prepare, "use prepare API for testing"); + static int test_alloc_len = 2048; module_param(test_alloc_len, int, 0); MODULE_PARM_DESC(test_alloc_len, "alloc len for testing"); @@ -74,6 +78,21 @@ static int page_frag_pop_thread(void *arg) return 0; } +static void frag_frag_test_commit(struct page_frag_cache *nc, + struct page_frag *prepare_pfrag, + struct page_frag *probe_pfrag, + unsigned int used_sz) +{ + if (prepare_pfrag->page != probe_pfrag->page || + prepare_pfrag->offset != probe_pfrag->offset || + prepare_pfrag->size != probe_pfrag->size) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "wrong probed info\n"); + } + + page_frag_commit(nc, prepare_pfrag, used_sz); +} + static int page_frag_push_thread(void *arg) { struct ptr_ring *ring = arg; @@ -86,15 +105,61 @@ static int page_frag_push_thread(void *arg) int ret; if (test_align) { - va = page_frag_alloc_align(&test_nc, test_alloc_len, - GFP_KERNEL, SMP_CACHE_BYTES); + if (test_prepare) { + struct page_frag prepare_frag, probe_frag; + void *probe_va; + + va = page_frag_alloc_refill_prepare_align(&test_nc, + test_alloc_len, + &prepare_frag, + GFP_KERNEL, + SMP_CACHE_BYTES); + + probe_va = __page_frag_alloc_refill_probe_align(&test_nc, + test_alloc_len, + &probe_frag, + -SMP_CACHE_BYTES); + if (va != probe_va) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "wrong va\n"); + } + + if (likely(va)) + frag_frag_test_commit(&test_nc, &prepare_frag, + &probe_frag, test_alloc_len); + } else { + va = page_frag_alloc_align(&test_nc, + test_alloc_len, + GFP_KERNEL, + SMP_CACHE_BYTES); + } if ((unsigned long)va & (SMP_CACHE_BYTES - 1)) { force_exit = true; WARN_ONCE(true, TEST_FAILED_PREFIX "unaligned va returned\n"); } } else { - va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + if (test_prepare) { + struct page_frag prepare_frag, probe_frag; + void *probe_va; + + va = page_frag_alloc_refill_prepare(&test_nc, test_alloc_len, + &prepare_frag, GFP_KERNEL); + + probe_va = page_frag_alloc_refill_probe(&test_nc, test_alloc_len, + &probe_frag); + + if (va != probe_va) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "wrong va\n"); + } + + if (likely(va)) + frag_frag_test_commit(&test_nc, &prepare_frag, + &probe_frag, test_alloc_len); + } else { + va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + } } if (!va) @@ -176,8 +241,9 @@ static int __init page_frag_test_init(void) } duration = (u64)ktime_us_delta(ktime_get(), start); - pr_info("%d of iterations for %s testing took: %lluus\n", nr_test, - test_align ? "aligned" : "non-aligned", duration); + pr_info("%d of iterations for %s %s API testing took: %lluus\n", nr_test, + test_align ? "aligned" : "non-aligned", + test_prepare ? "prepare" : "alloc", duration); out: ptr_ring_cleanup(&ptr_ring, NULL); diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index 2c5394584af4..f6ff9080a6f2 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -464,6 +464,10 @@ CATEGORY="page_frag" run_test ./test_page_frag.sh aligned CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned +CATEGORY="page_frag" run_test ./test_page_frag.sh aligned_prepare + +CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned_prepare + echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix echo "1..${count_total}" | tap_output diff --git a/tools/testing/selftests/mm/test_page_frag.sh b/tools/testing/selftests/mm/test_page_frag.sh index f55b105084cf..1c757fd11844 100755 --- a/tools/testing/selftests/mm/test_page_frag.sh +++ b/tools/testing/selftests/mm/test_page_frag.sh @@ -43,6 +43,8 @@ check_test_failed_prefix() { SMOKE_PARAM="test_push_cpu=$TEST_CPU_0 test_pop_cpu=$TEST_CPU_1" NONALIGNED_PARAM="$SMOKE_PARAM test_alloc_len=75 nr_test=$NR_TEST" ALIGNED_PARAM="$NONALIGNED_PARAM test_align=1" +NONALIGNED_PREPARE_PARAM="$NONALIGNED_PARAM test_prepare=1" +ALIGNED_PREPARE_PARAM="$ALIGNED_PARAM test_prepare=1" check_test_requirements() { @@ -77,6 +79,20 @@ run_aligned_check() insmod $DRIVER $ALIGNED_PARAM > /dev/null 2>&1 } +run_nonaligned_prepare_check() +{ + echo "Run performance tests to evaluate how fast nonaligned prepare API is." + + insmod $DRIVER $NONALIGNED_PREPARE_PARAM > /dev/null 2>&1 +} + +run_aligned_prepare_check() +{ + echo "Run performance tests to evaluate how fast aligned prepare API is." + + insmod $DRIVER $ALIGNED_PREPARE_PARAM > /dev/null 2>&1 +} + run_smoke_check() { echo "Run smoke test." @@ -87,6 +103,7 @@ run_smoke_check() usage() { echo -n "Usage: $0 [ aligned ] | [ nonaligned ] | | [ smoke ] | " + echo "[ aligned_prepare ] | [ nonaligned_prepare ] | " echo "manual parameters" echo echo "Valid tests and parameters:" @@ -107,6 +124,12 @@ usage() echo "# Performance testing for aligned alloc API" echo "$0 aligned" echo + echo "# Performance testing for nonaligned prepare API" + echo "$0 nonaligned_prepare" + echo + echo "# Performance testing for aligned prepare API" + echo "$0 aligned_prepare" + echo exit 0 } @@ -158,6 +181,10 @@ function run_test() run_nonaligned_check elif [[ "$1" = "aligned" ]]; then run_aligned_check + elif [[ "$1" = "nonaligned_prepare" ]]; then + run_nonaligned_prepare_check + elif [[ "$1" = "aligned_prepare" ]]; then + run_aligned_prepare_check else run_manual_check $@ fi -- 2.33.0

8 months, 2 weeks

1
0
0 0

[PATCH net-next v22 04/14] mm: page_frag: avoid caller accessing 'page_frag_cache' directly

by Yunsheng Lin

Use appropriate frag_page API instead of caller accessing 'page_frag_cache' directly. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> Acked-by: Chuck Lever <chuck.lever(a)oracle.com> --- drivers/vhost/net.c | 2 +- include/linux/page_frag_cache.h | 10 ++++++++++ net/core/skbuff.c | 6 +++--- net/rxrpc/conn_object.c | 4 +--- net/rxrpc/local_object.c | 4 +--- net/sunrpc/svcsock.c | 6 ++---- tools/testing/selftests/mm/page_frag/page_frag_test.c | 2 +- 7 files changed, 19 insertions(+), 15 deletions(-) diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c index f16279351db5..9ad37c012189 100644 --- a/drivers/vhost/net.c +++ b/drivers/vhost/net.c @@ -1325,7 +1325,7 @@ static int vhost_net_open(struct inode *inode, struct file *f) vqs[VHOST_NET_VQ_RX]); f->private_data = n; - n->pf_cache.va = NULL; + page_frag_cache_init(&n->pf_cache); return 0; } diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h index 67ac8626ed9b..0a52f7a179c8 100644 --- a/include/linux/page_frag_cache.h +++ b/include/linux/page_frag_cache.h @@ -7,6 +7,16 @@ #include <linux/mm_types_task.h> #include <linux/types.h> +static inline void page_frag_cache_init(struct page_frag_cache *nc) +{ + nc->va = NULL; +} + +static inline bool page_frag_cache_is_pfmemalloc(struct page_frag_cache *nc) +{ + return !!nc->pfmemalloc; +} + void page_frag_cache_drain(struct page_frag_cache *nc); void __page_frag_cache_drain(struct page *page, unsigned int count); void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 00afeb90c23a..6841e61a6bd0 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -753,14 +753,14 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len, if (in_hardirq() || irqs_disabled()) { nc = this_cpu_ptr(&netdev_alloc_cache); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); } else { local_bh_disable(); local_lock_nested_bh(&napi_alloc_cache.bh_lock); nc = this_cpu_ptr(&napi_alloc_cache.page); data = page_frag_alloc(nc, len, gfp_mask); - pfmemalloc = nc->pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(nc); local_unlock_nested_bh(&napi_alloc_cache.bh_lock); local_bh_enable(); @@ -850,7 +850,7 @@ struct sk_buff *napi_alloc_skb(struct napi_struct *napi, unsigned int len) len = SKB_HEAD_ALIGN(len); data = page_frag_alloc(&nc->page, len, gfp_mask); - pfmemalloc = nc->page.pfmemalloc; + pfmemalloc = page_frag_cache_is_pfmemalloc(&nc->page); } local_unlock_nested_bh(&napi_alloc_cache.bh_lock); diff --git a/net/rxrpc/conn_object.c b/net/rxrpc/conn_object.c index 1539d315afe7..694c4df7a1a3 100644 --- a/net/rxrpc/conn_object.c +++ b/net/rxrpc/conn_object.c @@ -337,9 +337,7 @@ static void rxrpc_clean_up_connection(struct work_struct *work) */ rxrpc_purge_queue(&conn->rx_queue); - if (conn->tx_data_alloc.va) - __page_frag_cache_drain(virt_to_page(conn->tx_data_alloc.va), - conn->tx_data_alloc.pagecnt_bias); + page_frag_cache_drain(&conn->tx_data_alloc); call_rcu(&conn->rcu, rxrpc_rcu_free_connection); } diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c index f9623ace2201..2792d2304605 100644 --- a/net/rxrpc/local_object.c +++ b/net/rxrpc/local_object.c @@ -452,9 +452,7 @@ void rxrpc_destroy_local(struct rxrpc_local *local) #endif rxrpc_purge_queue(&local->rx_queue); rxrpc_purge_client_connections(local); - if (local->tx_alloc.va) - __page_frag_cache_drain(virt_to_page(local->tx_alloc.va), - local->tx_alloc.pagecnt_bias); + page_frag_cache_drain(&local->tx_alloc); } /* diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 825ec5357691..b785425c3315 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1608,7 +1608,6 @@ static void svc_tcp_sock_detach(struct svc_xprt *xprt) static void svc_sock_free(struct svc_xprt *xprt) { struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); - struct page_frag_cache *pfc = &svsk->sk_frag_cache; struct socket *sock = svsk->sk_sock; trace_svcsock_free(svsk, sock); @@ -1618,8 +1617,7 @@ static void svc_sock_free(struct svc_xprt *xprt) sockfd_put(sock); else sock_release(sock); - if (pfc->va) - __page_frag_cache_drain(virt_to_head_page(pfc->va), - pfc->pagecnt_bias); + + page_frag_cache_drain(&svsk->sk_frag_cache); kfree(svsk); } diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index 13c44133e009..e806c1866e36 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -126,7 +126,7 @@ static int __init page_frag_test_init(void) u64 duration; int ret; - test_nc.va = NULL; + page_frag_cache_init(&test_nc); atomic_set(&nthreads, 2); init_completion(&wait); -- 2.33.0

8 months, 2 weeks

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[PATCH net-next v22 02/14] mm: move the page fragment allocator from page_alloc into its own file

by Yunsheng Lin

Inspired by [1], move the page fragment allocator from page_alloc into its own c file and header file, as we are about to make more change for it to replace another page_frag implementation in sock.c As this patchset is going to replace 'struct page_frag' with 'struct page_frag_cache' in sched.h, including page_frag_cache.h in sched.h has a compiler error caused by interdependence between mm_types.h and mm.h for asm-offsets.c, see [2]. So avoid the compiler error by moving 'struct page_frag_cache' to mm_types_task.h as suggested by Alexander, see [3]. 1. https://lore.kernel.org/all/20230411160902.4134381-3-dhowells@redhat.com/ 2. https://lore.kernel.org/all/15623dac-9358-4597-b3ee-3694a5956920@gmail.com/ 3. https://lore.kernel.org/all/CAKgT0UdH1yD=LSCXFJ=YM_aiA4OomD-2wXykO42bizaWMt… CC: David Howells <dhowells(a)redhat.com> CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Acked-by: Andrew Morton <akpm(a)linux-foundation.org> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> --- include/linux/gfp.h | 22 --- include/linux/mm_types.h | 18 --- include/linux/mm_types_task.h | 18 +++ include/linux/page_frag_cache.h | 31 ++++ include/linux/skbuff.h | 1 + mm/Makefile | 1 + mm/page_alloc.c | 136 ---------------- mm/page_frag_cache.c | 145 ++++++++++++++++++ .../selftests/mm/page_frag/page_frag_test.c | 2 +- 9 files changed, 197 insertions(+), 177 deletions(-) create mode 100644 include/linux/page_frag_cache.h create mode 100644 mm/page_frag_cache.c diff --git a/include/linux/gfp.h b/include/linux/gfp.h index a951de920e20..a0a6d25f883f 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -371,28 +371,6 @@ __meminit void *alloc_pages_exact_nid_noprof(int nid, size_t size, gfp_t gfp_mas extern void __free_pages(struct page *page, unsigned int order); extern void free_pages(unsigned long addr, unsigned int order); -struct page_frag_cache; -void page_frag_cache_drain(struct page_frag_cache *nc); -extern void __page_frag_cache_drain(struct page *page, unsigned int count); -void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, - gfp_t gfp_mask, unsigned int align_mask); - -static inline void *page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align) -{ - WARN_ON_ONCE(!is_power_of_2(align)); - return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); -} - -static inline void *page_frag_alloc(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask) -{ - return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); -} - -extern void page_frag_free(void *addr); - #define __free_page(page) __free_pages((page), 0) #define free_page(addr) free_pages((addr), 0) diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h index 6e3bdf8e38bc..92314ef2d978 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -521,9 +521,6 @@ static_assert(sizeof(struct ptdesc) <= sizeof(struct page)); */ #define STRUCT_PAGE_MAX_SHIFT (order_base_2(sizeof(struct page))) -#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) -#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) - /* * page_private can be used on tail pages. However, PagePrivate is only * checked by the VM on the head page. So page_private on the tail pages @@ -542,21 +539,6 @@ static inline void *folio_get_private(struct folio *folio) return folio->private; } -struct page_frag_cache { - void * va; -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - __u16 offset; - __u16 size; -#else - __u32 offset; -#endif - /* we maintain a pagecount bias, so that we dont dirty cache line - * containing page->_refcount every time we allocate a fragment. - */ - unsigned int pagecnt_bias; - bool pfmemalloc; -}; - typedef unsigned long vm_flags_t; /* diff --git a/include/linux/mm_types_task.h b/include/linux/mm_types_task.h index bff5706b76e1..0ac6daebdd5c 100644 --- a/include/linux/mm_types_task.h +++ b/include/linux/mm_types_task.h @@ -8,6 +8,7 @@ * (These are defined separately to decouple sched.h from mm_types.h as much as possible.) */ +#include <linux/align.h> #include <linux/types.h> #include <asm/page.h> @@ -43,6 +44,23 @@ struct page_frag { #endif }; +#define PAGE_FRAG_CACHE_MAX_SIZE __ALIGN_MASK(32768, ~PAGE_MASK) +#define PAGE_FRAG_CACHE_MAX_ORDER get_order(PAGE_FRAG_CACHE_MAX_SIZE) +struct page_frag_cache { + void *va; +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + __u16 offset; + __u16 size; +#else + __u32 offset; +#endif + /* we maintain a pagecount bias, so that we dont dirty cache line + * containing page->_refcount every time we allocate a fragment. + */ + unsigned int pagecnt_bias; + bool pfmemalloc; +}; + /* Track pages that require TLB flushes */ struct tlbflush_unmap_batch { #ifdef CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH diff --git a/include/linux/page_frag_cache.h b/include/linux/page_frag_cache.h new file mode 100644 index 000000000000..67ac8626ed9b --- /dev/null +++ b/include/linux/page_frag_cache.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _LINUX_PAGE_FRAG_CACHE_H +#define _LINUX_PAGE_FRAG_CACHE_H + +#include <linux/log2.h> +#include <linux/mm_types_task.h> +#include <linux/types.h> + +void page_frag_cache_drain(struct page_frag_cache *nc); +void __page_frag_cache_drain(struct page *page, unsigned int count); +void *__page_frag_alloc_align(struct page_frag_cache *nc, unsigned int fragsz, + gfp_t gfp_mask, unsigned int align_mask); + +static inline void *page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align) +{ + WARN_ON_ONCE(!is_power_of_2(align)); + return __page_frag_alloc_align(nc, fragsz, gfp_mask, -align); +} + +static inline void *page_frag_alloc(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask) +{ + return __page_frag_alloc_align(nc, fragsz, gfp_mask, ~0u); +} + +void page_frag_free(void *addr); + +#endif diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 48f1e0fa2a13..7adca0fa2602 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -31,6 +31,7 @@ #include <linux/in6.h> #include <linux/if_packet.h> #include <linux/llist.h> +#include <linux/page_frag_cache.h> #include <net/flow.h> #if IS_ENABLED(CONFIG_NF_CONNTRACK) #include <linux/netfilter/nf_conntrack_common.h> diff --git a/mm/Makefile b/mm/Makefile index d5639b036166..dba52bb0da8a 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -65,6 +65,7 @@ page-alloc-$(CONFIG_SHUFFLE_PAGE_ALLOCATOR) += shuffle.o memory-hotplug-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o obj-y += page-alloc.o +obj-y += page_frag_cache.o obj-y += init-mm.o obj-y += memblock.o obj-y += $(memory-hotplug-y) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8afab64814dc..6ca2abce857b 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4836,142 +4836,6 @@ void free_pages(unsigned long addr, unsigned int order) EXPORT_SYMBOL(free_pages); -/* - * Page Fragment: - * An arbitrary-length arbitrary-offset area of memory which resides - * within a 0 or higher order page. Multiple fragments within that page - * are individually refcounted, in the page's reference counter. - * - * The page_frag functions below provide a simple allocation framework for - * page fragments. This is used by the network stack and network device - * drivers to provide a backing region of memory for use as either an - * sk_buff->head, or to be used in the "frags" portion of skb_shared_info. - */ -static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, - gfp_t gfp_mask) -{ - struct page *page = NULL; - gfp_t gfp = gfp_mask; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | - __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; - page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, - PAGE_FRAG_CACHE_MAX_ORDER); - nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; -#endif - if (unlikely(!page)) - page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); - - nc->va = page ? page_address(page) : NULL; - - return page; -} - -void page_frag_cache_drain(struct page_frag_cache *nc) -{ - if (!nc->va) - return; - - __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); - nc->va = NULL; -} -EXPORT_SYMBOL(page_frag_cache_drain); - -void __page_frag_cache_drain(struct page *page, unsigned int count) -{ - VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); - - if (page_ref_sub_and_test(page, count)) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(__page_frag_cache_drain); - -void *__page_frag_alloc_align(struct page_frag_cache *nc, - unsigned int fragsz, gfp_t gfp_mask, - unsigned int align_mask) -{ - unsigned int size = PAGE_SIZE; - struct page *page; - int offset; - - if (unlikely(!nc->va)) { -refill: - page = __page_frag_cache_refill(nc, gfp_mask); - if (!page) - return NULL; - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* Even if we own the page, we do not use atomic_set(). - * This would break get_page_unless_zero() users. - */ - page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); - - /* reset page count bias and offset to start of new frag */ - nc->pfmemalloc = page_is_pfmemalloc(page); - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - nc->offset = size; - } - - offset = nc->offset - fragsz; - if (unlikely(offset < 0)) { - page = virt_to_page(nc->va); - - if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) - goto refill; - - if (unlikely(nc->pfmemalloc)) { - free_unref_page(page, compound_order(page)); - goto refill; - } - -#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) - /* if size can vary use size else just use PAGE_SIZE */ - size = nc->size; -#endif - /* OK, page count is 0, we can safely set it */ - set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); - - /* reset page count bias and offset to start of new frag */ - nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; - offset = size - fragsz; - if (unlikely(offset < 0)) { - /* - * The caller is trying to allocate a fragment - * with fragsz > PAGE_SIZE but the cache isn't big - * enough to satisfy the request, this may - * happen in low memory conditions. - * We don't release the cache page because - * it could make memory pressure worse - * so we simply return NULL here. - */ - return NULL; - } - } - - nc->pagecnt_bias--; - offset &= align_mask; - nc->offset = offset; - - return nc->va + offset; -} -EXPORT_SYMBOL(__page_frag_alloc_align); - -/* - * Frees a page fragment allocated out of either a compound or order 0 page. - */ -void page_frag_free(void *addr) -{ - struct page *page = virt_to_head_page(addr); - - if (unlikely(put_page_testzero(page))) - free_unref_page(page, compound_order(page)); -} -EXPORT_SYMBOL(page_frag_free); - static void *make_alloc_exact(unsigned long addr, unsigned int order, size_t size) { diff --git a/mm/page_frag_cache.c b/mm/page_frag_cache.c new file mode 100644 index 000000000000..609a485cd02a --- /dev/null +++ b/mm/page_frag_cache.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* Page fragment allocator + * + * Page Fragment: + * An arbitrary-length arbitrary-offset area of memory which resides within a + * 0 or higher order page. Multiple fragments within that page are + * individually refcounted, in the page's reference counter. + * + * The page_frag functions provide a simple allocation framework for page + * fragments. This is used by the network stack and network device drivers to + * provide a backing region of memory for use as either an sk_buff->head, or to + * be used in the "frags" portion of skb_shared_info. + */ + +#include <linux/export.h> +#include <linux/gfp_types.h> +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/page_frag_cache.h> +#include "internal.h" + +static struct page *__page_frag_cache_refill(struct page_frag_cache *nc, + gfp_t gfp_mask) +{ + struct page *page = NULL; + gfp_t gfp = gfp_mask; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + gfp_mask = (gfp_mask & ~__GFP_DIRECT_RECLAIM) | __GFP_COMP | + __GFP_NOWARN | __GFP_NORETRY | __GFP_NOMEMALLOC; + page = alloc_pages_node(NUMA_NO_NODE, gfp_mask, + PAGE_FRAG_CACHE_MAX_ORDER); + nc->size = page ? PAGE_FRAG_CACHE_MAX_SIZE : PAGE_SIZE; +#endif + if (unlikely(!page)) + page = alloc_pages_node(NUMA_NO_NODE, gfp, 0); + + nc->va = page ? page_address(page) : NULL; + + return page; +} + +void page_frag_cache_drain(struct page_frag_cache *nc) +{ + if (!nc->va) + return; + + __page_frag_cache_drain(virt_to_head_page(nc->va), nc->pagecnt_bias); + nc->va = NULL; +} +EXPORT_SYMBOL(page_frag_cache_drain); + +void __page_frag_cache_drain(struct page *page, unsigned int count) +{ + VM_BUG_ON_PAGE(page_ref_count(page) == 0, page); + + if (page_ref_sub_and_test(page, count)) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(__page_frag_cache_drain); + +void *__page_frag_alloc_align(struct page_frag_cache *nc, + unsigned int fragsz, gfp_t gfp_mask, + unsigned int align_mask) +{ + unsigned int size = PAGE_SIZE; + struct page *page; + int offset; + + if (unlikely(!nc->va)) { +refill: + page = __page_frag_cache_refill(nc, gfp_mask); + if (!page) + return NULL; + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* Even if we own the page, we do not use atomic_set(). + * This would break get_page_unless_zero() users. + */ + page_ref_add(page, PAGE_FRAG_CACHE_MAX_SIZE); + + /* reset page count bias and offset to start of new frag */ + nc->pfmemalloc = page_is_pfmemalloc(page); + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + nc->offset = size; + } + + offset = nc->offset - fragsz; + if (unlikely(offset < 0)) { + page = virt_to_page(nc->va); + + if (!page_ref_sub_and_test(page, nc->pagecnt_bias)) + goto refill; + + if (unlikely(nc->pfmemalloc)) { + free_unref_page(page, compound_order(page)); + goto refill; + } + +#if (PAGE_SIZE < PAGE_FRAG_CACHE_MAX_SIZE) + /* if size can vary use size else just use PAGE_SIZE */ + size = nc->size; +#endif + /* OK, page count is 0, we can safely set it */ + set_page_count(page, PAGE_FRAG_CACHE_MAX_SIZE + 1); + + /* reset page count bias and offset to start of new frag */ + nc->pagecnt_bias = PAGE_FRAG_CACHE_MAX_SIZE + 1; + offset = size - fragsz; + if (unlikely(offset < 0)) { + /* + * The caller is trying to allocate a fragment + * with fragsz > PAGE_SIZE but the cache isn't big + * enough to satisfy the request, this may + * happen in low memory conditions. + * We don't release the cache page because + * it could make memory pressure worse + * so we simply return NULL here. + */ + return NULL; + } + } + + nc->pagecnt_bias--; + offset &= align_mask; + nc->offset = offset; + + return nc->va + offset; +} +EXPORT_SYMBOL(__page_frag_alloc_align); + +/* + * Frees a page fragment allocated out of either a compound or order 0 page. + */ +void page_frag_free(void *addr) +{ + struct page *page = virt_to_head_page(addr); + + if (unlikely(put_page_testzero(page))) + free_unref_page(page, compound_order(page)); +} +EXPORT_SYMBOL(page_frag_free); diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c index 912d97b99107..13c44133e009 100644 --- a/tools/testing/selftests/mm/page_frag/page_frag_test.c +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -6,12 +6,12 @@ * Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> */ -#include <linux/mm.h> #include <linux/module.h> #include <linux/cpumask.h> #include <linux/completion.h> #include <linux/ptr_ring.h> #include <linux/kthread.h> +#include <linux/page_frag_cache.h> #define TEST_FAILED_PREFIX "page_frag_test failed: " -- 2.33.0

8 months, 2 weeks

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[PATCH net-next v22 01/14] mm: page_frag: add a test module for page_frag

by Yunsheng Lin

The testing is done by ensuring that the fragment allocated from a frag_frag_cache instance is pushed into a ptr_ring instance in a kthread binded to a specified cpu, and a kthread binded to a specified cpu will pop the fragment from the ptr_ring and free the fragment. CC: Alexander Duyck <alexander.duyck(a)gmail.com> Signed-off-by: Yunsheng Lin <linyunsheng(a)huawei.com> Reviewed-by: Alexander Duyck <alexanderduyck(a)fb.com> --- tools/testing/selftests/mm/Makefile | 3 + tools/testing/selftests/mm/page_frag/Makefile | 18 ++ .../selftests/mm/page_frag/page_frag_test.c | 198 ++++++++++++++++++ tools/testing/selftests/mm/run_vmtests.sh | 8 + tools/testing/selftests/mm/test_page_frag.sh | 175 ++++++++++++++++ 5 files changed, 402 insertions(+) create mode 100644 tools/testing/selftests/mm/page_frag/Makefile create mode 100644 tools/testing/selftests/mm/page_frag/page_frag_test.c create mode 100755 tools/testing/selftests/mm/test_page_frag.sh diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile index 02e1204971b0..acec529baaca 100644 --- a/tools/testing/selftests/mm/Makefile +++ b/tools/testing/selftests/mm/Makefile @@ -36,6 +36,8 @@ MAKEFLAGS += --no-builtin-rules CFLAGS = -Wall -I $(top_srcdir) $(EXTRA_CFLAGS) $(KHDR_INCLUDES) $(TOOLS_INCLUDES) LDLIBS = -lrt -lpthread -lm +TEST_GEN_MODS_DIR := page_frag + TEST_GEN_FILES = cow TEST_GEN_FILES += compaction_test TEST_GEN_FILES += gup_longterm @@ -126,6 +128,7 @@ TEST_FILES += test_hmm.sh TEST_FILES += va_high_addr_switch.sh TEST_FILES += charge_reserved_hugetlb.sh TEST_FILES += hugetlb_reparenting_test.sh +TEST_FILES += test_page_frag.sh # required by charge_reserved_hugetlb.sh TEST_FILES += write_hugetlb_memory.sh diff --git a/tools/testing/selftests/mm/page_frag/Makefile b/tools/testing/selftests/mm/page_frag/Makefile new file mode 100644 index 000000000000..58dda74d50a3 --- /dev/null +++ b/tools/testing/selftests/mm/page_frag/Makefile @@ -0,0 +1,18 @@ +PAGE_FRAG_TEST_DIR := $(realpath $(dir $(abspath $(lastword $(MAKEFILE_LIST))))) +KDIR ?= $(abspath $(PAGE_FRAG_TEST_DIR)/../../../../..) + +ifeq ($(V),1) +Q = +else +Q = @ +endif + +MODULES = page_frag_test.ko + +obj-m += page_frag_test.o + +all: + +$(Q)make -C $(KDIR) M=$(PAGE_FRAG_TEST_DIR) modules + +clean: + +$(Q)make -C $(KDIR) M=$(PAGE_FRAG_TEST_DIR) clean diff --git a/tools/testing/selftests/mm/page_frag/page_frag_test.c b/tools/testing/selftests/mm/page_frag/page_frag_test.c new file mode 100644 index 000000000000..912d97b99107 --- /dev/null +++ b/tools/testing/selftests/mm/page_frag/page_frag_test.c @@ -0,0 +1,198 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Test module for page_frag cache + * + * Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> + */ + +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/cpumask.h> +#include <linux/completion.h> +#include <linux/ptr_ring.h> +#include <linux/kthread.h> + +#define TEST_FAILED_PREFIX "page_frag_test failed: " + +static struct ptr_ring ptr_ring; +static int nr_objs = 512; +static atomic_t nthreads; +static struct completion wait; +static struct page_frag_cache test_nc; +static int test_popped; +static int test_pushed; +static bool force_exit; + +static int nr_test = 2000000; +module_param(nr_test, int, 0); +MODULE_PARM_DESC(nr_test, "number of iterations to test"); + +static bool test_align; +module_param(test_align, bool, 0); +MODULE_PARM_DESC(test_align, "use align API for testing"); + +static int test_alloc_len = 2048; +module_param(test_alloc_len, int, 0); +MODULE_PARM_DESC(test_alloc_len, "alloc len for testing"); + +static int test_push_cpu; +module_param(test_push_cpu, int, 0); +MODULE_PARM_DESC(test_push_cpu, "test cpu for pushing fragment"); + +static int test_pop_cpu; +module_param(test_pop_cpu, int, 0); +MODULE_PARM_DESC(test_pop_cpu, "test cpu for popping fragment"); + +static int page_frag_pop_thread(void *arg) +{ + struct ptr_ring *ring = arg; + + pr_info("page_frag pop test thread begins on cpu %d\n", + smp_processor_id()); + + while (test_popped < nr_test) { + void *obj = __ptr_ring_consume(ring); + + if (obj) { + test_popped++; + page_frag_free(obj); + } else { + if (force_exit) + break; + + cond_resched(); + } + } + + if (atomic_dec_and_test(&nthreads)) + complete(&wait); + + pr_info("page_frag pop test thread exits on cpu %d\n", + smp_processor_id()); + + return 0; +} + +static int page_frag_push_thread(void *arg) +{ + struct ptr_ring *ring = arg; + + pr_info("page_frag push test thread begins on cpu %d\n", + smp_processor_id()); + + while (test_pushed < nr_test && !force_exit) { + void *va; + int ret; + + if (test_align) { + va = page_frag_alloc_align(&test_nc, test_alloc_len, + GFP_KERNEL, SMP_CACHE_BYTES); + + if ((unsigned long)va & (SMP_CACHE_BYTES - 1)) { + force_exit = true; + WARN_ONCE(true, TEST_FAILED_PREFIX "unaligned va returned\n"); + } + } else { + va = page_frag_alloc(&test_nc, test_alloc_len, GFP_KERNEL); + } + + if (!va) + continue; + + ret = __ptr_ring_produce(ring, va); + if (ret) { + page_frag_free(va); + cond_resched(); + } else { + test_pushed++; + } + } + + pr_info("page_frag push test thread exits on cpu %d\n", + smp_processor_id()); + + if (atomic_dec_and_test(&nthreads)) + complete(&wait); + + return 0; +} + +static int __init page_frag_test_init(void) +{ + struct task_struct *tsk_push, *tsk_pop; + int last_pushed = 0, last_popped = 0; + ktime_t start; + u64 duration; + int ret; + + test_nc.va = NULL; + atomic_set(&nthreads, 2); + init_completion(&wait); + + if (test_alloc_len > PAGE_SIZE || test_alloc_len <= 0 || + !cpu_active(test_push_cpu) || !cpu_active(test_pop_cpu)) + return -EINVAL; + + ret = ptr_ring_init(&ptr_ring, nr_objs, GFP_KERNEL); + if (ret) + return ret; + + tsk_push = kthread_create_on_cpu(page_frag_push_thread, &ptr_ring, + test_push_cpu, "page_frag_push"); + if (IS_ERR(tsk_push)) + return PTR_ERR(tsk_push); + + tsk_pop = kthread_create_on_cpu(page_frag_pop_thread, &ptr_ring, + test_pop_cpu, "page_frag_pop"); + if (IS_ERR(tsk_pop)) { + kthread_stop(tsk_push); + return PTR_ERR(tsk_pop); + } + + start = ktime_get(); + wake_up_process(tsk_push); + wake_up_process(tsk_pop); + + pr_info("waiting for test to complete\n"); + + while (!wait_for_completion_timeout(&wait, msecs_to_jiffies(10000))) { + /* exit if there is no progress for push or pop size */ + if (last_pushed == test_pushed || last_popped == test_popped) { + WARN_ONCE(true, TEST_FAILED_PREFIX "no progress\n"); + force_exit = true; + continue; + } + + last_pushed = test_pushed; + last_popped = test_popped; + pr_info("page_frag_test progress: pushed = %d, popped = %d\n", + test_pushed, test_popped); + } + + if (force_exit) { + pr_err(TEST_FAILED_PREFIX "exit with error\n"); + goto out; + } + + duration = (u64)ktime_us_delta(ktime_get(), start); + pr_info("%d of iterations for %s testing took: %lluus\n", nr_test, + test_align ? "aligned" : "non-aligned", duration); + +out: + ptr_ring_cleanup(&ptr_ring, NULL); + page_frag_cache_drain(&test_nc); + + return -EAGAIN; +} + +static void __exit page_frag_test_exit(void) +{ +} + +module_init(page_frag_test_init); +module_exit(page_frag_test_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Yunsheng Lin <linyunsheng(a)huawei.com>"); +MODULE_DESCRIPTION("Test module for page_frag"); diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index c5797ad1d37b..2c5394584af4 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -75,6 +75,8 @@ separated by spaces: read-only VMAs - mdwe test prctl(PR_SET_MDWE, ...) +- page_frag + test handling of page fragment allocation and freeing example: ./run_vmtests.sh -t "hmm mmap ksm" EOF @@ -456,6 +458,12 @@ CATEGORY="mkdirty" run_test ./mkdirty CATEGORY="mdwe" run_test ./mdwe_test +CATEGORY="page_frag" run_test ./test_page_frag.sh smoke + +CATEGORY="page_frag" run_test ./test_page_frag.sh aligned + +CATEGORY="page_frag" run_test ./test_page_frag.sh nonaligned + echo "SUMMARY: PASS=${count_pass} SKIP=${count_skip} FAIL=${count_fail}" | tap_prefix echo "1..${count_total}" | tap_output diff --git a/tools/testing/selftests/mm/test_page_frag.sh b/tools/testing/selftests/mm/test_page_frag.sh new file mode 100755 index 000000000000..f55b105084cf --- /dev/null +++ b/tools/testing/selftests/mm/test_page_frag.sh @@ -0,0 +1,175 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (C) 2024 Yunsheng Lin <linyunsheng(a)huawei.com> +# Copyright (C) 2018 Uladzislau Rezki (Sony) <urezki(a)gmail.com> +# +# This is a test script for the kernel test driver to test the +# correctness and performance of page_frag's implementation. +# Therefore it is just a kernel module loader. You can specify +# and pass different parameters in order to: +# a) analyse performance of page fragment allocations; +# b) stressing and stability check of page_frag subsystem. + +DRIVER="./page_frag/page_frag_test.ko" +CPU_LIST=$(grep -m 2 processor /proc/cpuinfo | cut -d ' ' -f 2) +TEST_CPU_0=$(echo $CPU_LIST | awk '{print $1}') + +if [ $(echo $CPU_LIST | wc -w) -gt 1 ]; then + TEST_CPU_1=$(echo $CPU_LIST | awk '{print $2}') + NR_TEST=100000000 +else + TEST_CPU_1=$TEST_CPU_0 + NR_TEST=1000000 +fi + +# 1 if fails +exitcode=1 + +# Kselftest framework requirement - SKIP code is 4. +ksft_skip=4 + +check_test_failed_prefix() { + if dmesg | grep -q 'page_frag_test failed:';then + echo "page_frag_test failed, please check dmesg" + exit $exitcode + fi +} + +# +# Static templates for testing of page_frag APIs. +# Also it is possible to pass any supported parameters manually. +# +SMOKE_PARAM="test_push_cpu=$TEST_CPU_0 test_pop_cpu=$TEST_CPU_1" +NONALIGNED_PARAM="$SMOKE_PARAM test_alloc_len=75 nr_test=$NR_TEST" +ALIGNED_PARAM="$NONALIGNED_PARAM test_align=1" + +check_test_requirements() +{ + uid=$(id -u) + if [ $uid -ne 0 ]; then + echo "$0: Must be run as root" + exit $ksft_skip + fi + + if ! which insmod > /dev/null 2>&1; then + echo "$0: You need insmod installed" + exit $ksft_skip + fi + + if [ ! -f $DRIVER ]; then + echo "$0: You need to compile page_frag_test module" + exit $ksft_skip + fi +} + +run_nonaligned_check() +{ + echo "Run performance tests to evaluate how fast nonaligned alloc API is." + + insmod $DRIVER $NONALIGNED_PARAM > /dev/null 2>&1 +} + +run_aligned_check() +{ + echo "Run performance tests to evaluate how fast aligned alloc API is." + + insmod $DRIVER $ALIGNED_PARAM > /dev/null 2>&1 +} + +run_smoke_check() +{ + echo "Run smoke test." + + insmod $DRIVER $SMOKE_PARAM > /dev/null 2>&1 +} + +usage() +{ + echo -n "Usage: $0 [ aligned ] | [ nonaligned ] | | [ smoke ] | " + echo "manual parameters" + echo + echo "Valid tests and parameters:" + echo + modinfo $DRIVER + echo + echo "Example usage:" + echo + echo "# Shows help message" + echo "$0" + echo + echo "# Smoke testing" + echo "$0 smoke" + echo + echo "# Performance testing for nonaligned alloc API" + echo "$0 nonaligned" + echo + echo "# Performance testing for aligned alloc API" + echo "$0 aligned" + echo + exit 0 +} + +function validate_passed_args() +{ + VALID_ARGS=`modinfo $DRIVER | awk '/parm:/ {print $2}' | sed 's/:.*//'` + + # + # Something has been passed, check it. + # + for passed_arg in $@; do + key=${passed_arg//=*/} + valid=0 + + for valid_arg in $VALID_ARGS; do + if [[ $key = $valid_arg ]]; then + valid=1 + break + fi + done + + if [[ $valid -ne 1 ]]; then + echo "Error: key is not correct: ${key}" + exit $exitcode + fi + done +} + +function run_manual_check() +{ + # + # Validate passed parameters. If there is wrong one, + # the script exists and does not execute further. + # + validate_passed_args $@ + + echo "Run the test with following parameters: $@" + insmod $DRIVER $@ > /dev/null 2>&1 +} + +function run_test() +{ + if [ $# -eq 0 ]; then + usage + else + if [[ "$1" = "smoke" ]]; then + run_smoke_check + elif [[ "$1" = "nonaligned" ]]; then + run_nonaligned_check + elif [[ "$1" = "aligned" ]]; then + run_aligned_check + else + run_manual_check $@ + fi + fi + + check_test_failed_prefix + + echo "Done." + echo "Check the kernel ring buffer to see the summary." +} + +check_test_requirements +run_test $@ + +exit 0 -- 2.33.0

8 months, 2 weeks

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[PATCH v2] kselftests: Add test to detect boot event slowdowns

by Laura Nao

Introduce a new kselftest to identify slowdowns in key boot events. This test uses ftrace to monitor the start and end times, as well as the durations of all initcalls, and compares these timings to reference values to identify significant slowdowns. The script functions in two modes: the 'generate' mode allows to create a JSON file containing initial reference timings for all initcalls from a known stable kernel. The 'test' mode can be used during subsequent boots to assess current timings against the reference values and determine if there are any significant differences. The test ships with a bootconfig file for setting up ftrace and a configuration fragment for the necessary kernel configs. Signed-off-by: Laura Nao <laura.nao(a)collabora.com> --- Hello, This v2 is a follow-up to RFCv1[1] and includes changes based on feedback from the LPC 2024 session [2], along with some other fixes. [1] https://lore.kernel.org/all/20240725110622.96301-1-laura.nao@collabora.com/ [2] https://www.youtube.com/watch?v=rWhW2-Vzi40 After reviewing other available tests and considering the feedback from discussions at Plumbers, I decided to stick with the bootconfig file approach but extend it to track all initcalls instead of a fixed set of functions or events. The bootconfig file can be expanded and adapted to track additional functions if needed for specific use cases. I also defined a synthetic event to calculate initcall durations, while still tracking their start and end times. Users are then allowed to choose whether to compare start times, end times, or durations. Support for specifying different rules for different initcalls has also been added. In RFCv1, there was some discussion about using existing tools like bootgraph.py. However, the output from these tools is mainly for manual inspection (e.g., HTML visual output), whereas this test is designed to run in automated CI environments too. The kselftest proposed here combines the process of generating reference data and running tests into a single script with two modes, making it easy to integrate into automated workflows. Many of the features in this v2 (e.g., generating a JSON reference file, comparing timings, and reporting results in KTAP format) could potentially be integrated into bootgraph.py with some effort. However, since this test is intended for automated execution rather than manual use, I've decided to keep it separate for now and explore the options suggested at LPC, such as using ftrace histograms for initcall latencies. I'm open to revisiting this decision and working toward integrating the changes into bootgraph.py if there's a strong preference for unifying the tools. Let me know your thoughts. A comprehensive changelog is reported below. Thanks, Laura --- Changes in v2: - Updated ftrace configuration to track all initcall start times, end times, and durations, and generate a histogram. - Modified test logic to compare initcall durations by default, with the option to compare start or end times if needed. - Added warnings if the initcalls in the reference file differ from those detected in the running system. - Combined the scripts into a single script with two modes: one for generating the reference file and one for running the test. - Added support for specifying different rules for individual initcalls. - Switched the reference format from YAML to JSON. - Added metadata to the reference file, including kernel version, kernel configuration, and cmdline. - Link to v1: https://lore.kernel.org/all/20240725110622.96301-1-laura.nao@collabora.com/ --- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/boot-time/Makefile | 16 ++ tools/testing/selftests/boot-time/bootconfig | 15 + tools/testing/selftests/boot-time/config | 6 + .../selftests/boot-time/test_boot_time.py | 265 ++++++++++++++++++ 5 files changed, 303 insertions(+) create mode 100644 tools/testing/selftests/boot-time/Makefile create mode 100644 tools/testing/selftests/boot-time/bootconfig create mode 100644 tools/testing/selftests/boot-time/config create mode 100755 tools/testing/selftests/boot-time/test_boot_time.py diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b38199965f99..1bb20d1e3854 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -3,6 +3,7 @@ TARGETS += acct TARGETS += alsa TARGETS += amd-pstate TARGETS += arm64 +TARGETS += boot-time TARGETS += bpf TARGETS += breakpoints TARGETS += cachestat diff --git a/tools/testing/selftests/boot-time/Makefile b/tools/testing/selftests/boot-time/Makefile new file mode 100644 index 000000000000..cdcdc1bbe779 --- /dev/null +++ b/tools/testing/selftests/boot-time/Makefile @@ -0,0 +1,16 @@ +PY3 = $(shell which python3 2>/dev/null) + +ifneq ($(PY3),) + +TEST_PROGS := test_boot_time.py + +include ../lib.mk + +else + +all: no_py3_warning + +no_py3_warning: + @echo "Missing python3. This test will be skipped." + +endif \ No newline at end of file diff --git a/tools/testing/selftests/boot-time/bootconfig b/tools/testing/selftests/boot-time/bootconfig new file mode 100644 index 000000000000..e4b89a33b7a3 --- /dev/null +++ b/tools/testing/selftests/boot-time/bootconfig @@ -0,0 +1,15 @@ +ftrace.event { + synthetic.initcall_latency { + # Synthetic event to record initcall latency, start, and end times + fields = "unsigned long func", "u64 lat", "u64 start", "u64 end" + actions = "hist:keys=func.sym,start,end:vals=lat:sort=lat" + } + initcall.initcall_start { + # Capture the start time (ts0) when initcall starts + actions = "hist:keys=func:ts0=common_timestamp.usecs" + } + initcall.initcall_finish { + # Capture the end time, calculate latency, and trigger synthetic event + actions = "hist:keys=func:lat=common_timestamp.usecs-$ts0:start=$ts0:end=common_timestamp.usecs:onmatch(initcall.initcall_start).initcall_latency(func,$lat,$start,$end)" + } +} \ No newline at end of file diff --git a/tools/testing/selftests/boot-time/config b/tools/testing/selftests/boot-time/config new file mode 100644 index 000000000000..bcb646ec3cd8 --- /dev/null +++ b/tools/testing/selftests/boot-time/config @@ -0,0 +1,6 @@ +CONFIG_TRACING=y +CONFIG_BOOTTIME_TRACING=y +CONFIG_BOOT_CONFIG_EMBED=y +CONFIG_BOOT_CONFIG_EMBED_FILE="tools/testing/selftests/boot-time/bootconfig" +CONFIG_SYNTH_EVENTS=y +CONFIG_HIST_TRIGGERS=y \ No newline at end of file diff --git a/tools/testing/selftests/boot-time/test_boot_time.py b/tools/testing/selftests/boot-time/test_boot_time.py new file mode 100755 index 000000000000..556dacf04b6d --- /dev/null +++ b/tools/testing/selftests/boot-time/test_boot_time.py @@ -0,0 +1,265 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 +# +# Copyright (c) 2024 Collabora Ltd +# +# This script reads the +# /sys/kernel/debug/tracing/events/synthetic/initcall_latency/hist file, +# extracts function names and timings, and compares them against reference +# timings provided in an input JSON file to identify significant boot +# slowdowns. +# The script operates in two modes: +# - Generate Mode: parses initcall timings from the current kernel's ftrace +# event histogram and generates a JSON reference file with function +# names, start times, end times, and latencies. +# - Test Mode: compares current initcall timings against the reference +# file, allowing users to define a maximum allowed difference between the +# values (delta). Users can also apply custom delta thresholds for +# specific initcalls using regex-based overrides. The comparison can be +# done on latency, start, or end times. +# + +import os +import sys +import argparse +import gzip +import json +import re +import subprocess + +this_dir = os.path.dirname(os.path.realpath(__file__)) +sys.path.append(os.path.join(this_dir, "../kselftest/")) + +import ksft + +def load_reference_from_json(file_path): + """ + Load reference data from a JSON file and returns the parsed data. + @file_path: path to the JSON file. + """ + + try: + with open(file_path, 'r', encoding="utf-8") as file: + return json.load(file) + except FileNotFoundError: + ksft.print_msg(f"Error: File {file_path} not found.") + ksft.exit_fail() + except json.JSONDecodeError: + ksft.print_msg(f"Error: Failed to decode JSON from {file_path}.") + ksft.exit_fail() + + +def mount_debugfs(path): + """ + Mount debugfs at the specified path if it is not already mounted. + @path: path where debugfs should be mounted + """ + # Check if debugfs is already mounted + with open('/proc/mounts', 'r', encoding="utf-8") as mounts: + for line in mounts: + if 'debugfs' in line and path in line: + print(f"debugfs is already mounted at {path}") + return True + + # Mount debugfs + try: + subprocess.run(['mount', '-t', 'debugfs', 'none', path], check=True) + return True + except subprocess.CalledProcessError as e: + print(f"Failed to mount debugfs: {e.stderr}") + return False + + +def ensure_unique_function_name(func, initcall_entries): + """ + Ensure the function name is unique by appending a suffix if necessary. + @func: the original function name. + @initcall_entries: a dictionary containing parsed initcall entries. + """ + i = 2 + base_func = func + while func in initcall_entries: + func = f'{base_func}[{i}]' + i += 1 + return func + + +def parse_initcall_latency_hist(): + """ + Parse the ftrace histogram for the initcall_latency event, extracting + function names, start times, end times, and latencies. Return a + dictionary where each entry is structured as follows: + { + <function symbolic name>: { + "start": <start time>, + "end": <end time>, + "latency": <latency> + } + } + """ + + pattern = re.compile(r'\{ func: \[\w+\] ([\w_]+)\s*, start: *(\d+), end: *(\d+) \} hitcount: *\d+ lat: *(\d+)') + initcall_entries = {} + + try: + with open('/sys/kernel/debug/tracing/events/synthetic/initcall_latency/hist', 'r', encoding="utf-8") as hist_file: + for line in hist_file: + match = pattern.search(line) + if match: + func = match.group(1).strip() + start = int(match.group(2)) + end = int(match.group(3)) + latency = int(match.group(4)) + + # filter out unresolved names + if not func.startswith("0x"): + func = ensure_unique_function_name(func, initcall_entries) + + initcall_entries[func] = { + "start": start, + "end": end, + "latency": latency + } + except FileNotFoundError: + print("Error: Histogram file not found.") + + return initcall_entries + + +def compare_initcall_list(ref_initcall_entries, cur_initcall_entries): + """ + Compare the current list of initcall functions against the reference + file. Print warnings if there are unique entries in either. + @ref_initcall_entries: reference initcall entries. + @cur_initcall_entries: current initcall entries. + """ + ref_entries = set(ref_initcall_entries.keys()) + cur_entries = set(cur_initcall_entries.keys()) + + unique_to_ref = ref_entries - cur_entries + unique_to_cur = cur_entries - ref_entries + + if (unique_to_ref): + ksft.print_msg( + f"Warning: {list(unique_to_ref)} not found in current data. Consider updating reference file.") + if unique_to_cur: + ksft.print_msg( + f"Warning: {list(unique_to_cur)} not found in reference data. Consider updating reference file.") + + +def run_test(ref_file_path, delta, overrides, mode): + """ + Run the test comparing the current timings with the reference values. + @ref_file_path: path to the JSON file containing reference values. + @delta: default allowed difference between reference and current + values. + @overrides: override rules in the form of regex:threshold. + @mode: the comparison mode (either 'start', 'end', or 'latency'). + """ + + ref_data = load_reference_from_json(ref_file_path) + + ref_initcall_entries = ref_data['data'] + cur_initcall_entries = parse_initcall_latency_hist() + + compare_initcall_list(ref_initcall_entries, cur_initcall_entries) + + ksft.set_plan(len(ref_initcall_entries)) + + for func_name in ref_initcall_entries: + effective_delta = delta + for regex, override_delta in overrides.items(): + if re.match(regex, func_name): + effective_delta = override_delta + break + if (func_name in cur_initcall_entries): + ref_metric = ref_initcall_entries[func_name].get(mode) + cur_metric = cur_initcall_entries[func_name].get(mode) + if (cur_metric > ref_metric and (cur_metric - ref_metric) >= effective_delta): + ksft.test_result_fail(func_name) + ksft.print_msg(f"'{func_name}' {mode} differs by " + f"{(cur_metric - ref_metric)} usecs.") + else: + ksft.test_result_pass(func_name) + else: + ksft.test_result_skip(func_name) + + +def generate_reference_file(file_path): + """ + Generate a reference file in JSON format, containing kernel metadata + and initcall timing data. + @file_path: output file path. + """ + metadata = {} + + config_file = "/proc/config.gz" + if os.path.isfile(config_file): + with gzip.open(config_file, "rt", encoding="utf-8") as f: + config = f.read() + metadata["config"] = config + + metadata["version"] = os.uname().release + + cmdline_file = "/proc/cmdline" + if os.path.isfile(cmdline_file): + with open(cmdline_file, "r", encoding="utf-8") as f: + cmdline = f.read().strip() + metadata["cmdline"] = cmdline + + ref_data = { + "metadata": metadata, + "data": parse_initcall_latency_hist(), + } + + with open(file_path, "w", encoding='utf-8') as f: + json.dump(ref_data, f, indent=4) + print(f"Generated {file_path}") + + +if __name__ == "__main__": + parser = argparse.ArgumentParser( + description="") + + subparsers = parser.add_subparsers(dest='mode', required=True, help='Choose between generate or test modes') + + generate_parser = subparsers.add_parser('generate', help="Generate a reference file") + generate_parser.add_argument('out_ref_file', nargs='?', default='reference_initcall_timings.json', + help='Path to output JSON reference file (default: reference_initcall_timings.json)') + + compare_parser = subparsers.add_parser('test', help='Test against a reference file') + compare_parser.add_argument('in_ref_file', help='Path to JSON reference file') + compare_parser.add_argument( + 'delta', type=int, help='Maximum allowed delta between the current and the reference timings (usecs)') + compare_parser.add_argument('--override', '-o', action='append', type=str, + help="Specify regex-based rules as regex:delta (e.g., '^acpi_.*:50')") + compare_parser.add_argument('--mode', '-m', default='latency', choices=[ + 'start', 'end', 'latency'], + help="Comparison mode: 'latency' (default) for latency, 'start' for start times, or 'end' for end times.") + + args = parser.parse_args() + + if args.mode == 'generate': + generate_reference_file(args.out_ref_file) + sys.exit(0) + + # Process overrides + overrides = {} + if args.override: + for override in args.override: + try: + pattern, delta = override.split(":") + overrides[pattern] = int(delta) + except ValueError: + print(f"Invalid override format: {override}. Expected format is 'regex:delta'.") + sys.exit(1) + + # Ensure debugfs is mounted + if not mount_debugfs("/sys/kernel/debug"): + ksft.exit_fail() + + ksft.print_header() + + run_test(args.in_ref_file, args.delta, overrides, args.mode) + + ksft.finished() -- 2.30.2

8 months, 2 weeks

1
0
0 0

[PATCH v2] selftest/tcp-ao: Add filter tests

by Leo Stone

Add tests that check if getsockopt(TCP_AO_GET_KEYS) returns the right keys when using different filters. Sample output: > # ok 114 filter keys: by sndid, rcvid, address > # ok 115 filter keys: by is_current > # ok 116 filter keys: by is_rnext > # ok 117 filter keys: by sndid, rcvid > # ok 118 filter keys: correct nkeys when in.nkeys < matched_keys Signed-off-by: Leo Stone <leocstone(a)gmail.com> --- Changes in v2: - Changed 2 unnecessary test_error calls to test_fail - Added another test to make sure getsockopt returns the right nkeys value when the input nkeys is smaller than the number of matching keys - Removed the TODO that this patch addresses Thank you for your feedback. --- .../selftests/net/tcp_ao/setsockopt-closed.c | 180 +++++++++++++++++- 1 file changed, 175 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c b/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c index 084db4ecdff6..4bfa76c28e4e 100644 --- a/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c +++ b/tools/testing/selftests/net/tcp_ao/setsockopt-closed.c @@ -6,6 +6,8 @@ static union tcp_addr tcp_md5_client; +#define FILTER_TEST_NKEYS 16 + static int test_port = 7788; static void make_listen(int sk) { @@ -813,23 +815,191 @@ static void duplicate_tests(void) setsockopt_checked(sk, TCP_AO_ADD_KEY, &ao, EEXIST, "duplicate: SendID differs"); } + +static void fetch_all_keys(int sk, struct tcp_ao_getsockopt *keys) +{ + socklen_t optlen = sizeof(struct tcp_ao_getsockopt); + + memset(keys, 0, sizeof(struct tcp_ao_getsockopt) * FILTER_TEST_NKEYS); + keys[0].get_all = 1; + keys[0].nkeys = FILTER_TEST_NKEYS; + if (getsockopt(sk, IPPROTO_TCP, TCP_AO_GET_KEYS, &keys[0], &optlen)) + test_error("getsockopt"); +} + +static int prepare_test_keys(struct tcp_ao_getsockopt *keys) +{ + struct tcp_ao_add test_ao[FILTER_TEST_NKEYS]; + u8 rcvid = 100, sndid = 100; + const char *test_password = "Test password number "; + char test_password_scratch[64] = {}; + int sk = socket(test_family, SOCK_STREAM, IPPROTO_TCP); + + if (sk < 0) + test_error("socket()"); + + for (int i = 0; i < FILTER_TEST_NKEYS; i++) { + snprintf(test_password_scratch, 64, "%s %d", test_password, i); + test_prepare_key(&test_ao[i], DEFAULT_TEST_ALGO, this_ip_dest, false, false, + DEFAULT_TEST_PREFIX, 0, sndid++, rcvid++, 0, 0, + strlen(test_password_scratch), test_password_scratch); + } + test_ao[0].set_current = 1; + test_ao[1].set_rnext = 1; + /* One key with a different addr and overlapping sndid, rcvid */ + tcp_addr_to_sockaddr_in(&test_ao[2].addr, &this_ip_addr, 0); + test_ao[2].sndid = 100; + test_ao[2].rcvid = 100; + + /* Add keys in a random order */ + for (int i = 0; i < FILTER_TEST_NKEYS; i++) { + int randidx = rand() % (FILTER_TEST_NKEYS - i); + + if (setsockopt(sk, IPPROTO_TCP, TCP_AO_ADD_KEY, &test_ao[randidx], + sizeof(struct tcp_ao_add))) + test_error("setsockopt()"); + memcpy(&test_ao[randidx], &test_ao[FILTER_TEST_NKEYS - 1 - i], + sizeof(struct tcp_ao_add)); + } + + fetch_all_keys(sk, keys); + + return sk; +} + +/* Assumes passwords are unique */ +static int compare_mkts(struct tcp_ao_getsockopt *expected, int nexpected, + struct tcp_ao_getsockopt *actual, int nactual) +{ + int matches = 0; + + for (int i = 0; i < nexpected; i++) { + for (int j = 0; j < nactual; j++) { + if (memcmp(expected[i].key, actual[j].key, TCP_AO_MAXKEYLEN) == 0) + matches++; + } + } + return nexpected - matches; +} + +static void filter_keys_checked(int sk, struct tcp_ao_getsockopt *filter, + struct tcp_ao_getsockopt *expected, + unsigned int nexpected, const char *tst) +{ + struct tcp_ao_getsockopt all_keys[FILTER_TEST_NKEYS] = {}; + struct tcp_ao_getsockopt filtered_keys[FILTER_TEST_NKEYS] = {}; + socklen_t len = sizeof(struct tcp_ao_getsockopt); + + fetch_all_keys(sk, all_keys); + memcpy(&filtered_keys[0], filter, sizeof(struct tcp_ao_getsockopt)); + filtered_keys[0].nkeys = FILTER_TEST_NKEYS; + if (getsockopt(sk, IPPROTO_TCP, TCP_AO_GET_KEYS, filtered_keys, &len)) + test_error("getsockopt"); + if (filtered_keys[0].nkeys != nexpected) { + test_fail("wrong nr of keys, expected %u got %u", nexpected, + filtered_keys[0].nkeys); + goto out_close; + } + if (compare_mkts(expected, nexpected, filtered_keys, filtered_keys[0].nkeys)) { + test_fail("got wrong keys back"); + goto out_close; + } + test_ok("filter keys: %s", tst); + +out_close: + close(sk); + memset(filter, 0, sizeof(struct tcp_ao_getsockopt)); +} + +static void filter_tests(void) +{ + struct tcp_ao_getsockopt original_keys[FILTER_TEST_NKEYS]; + struct tcp_ao_getsockopt expected_keys[FILTER_TEST_NKEYS]; + struct tcp_ao_getsockopt filter = {}; + int sk, f, nmatches; + socklen_t len; + + f = 2; + sk = prepare_test_keys(original_keys); + filter.rcvid = original_keys[f].rcvid; + filter.sndid = original_keys[f].sndid; + memcpy(&filter.addr, &original_keys[f].addr, sizeof(original_keys[f].addr)); + filter.prefix = original_keys[f].prefix; + filter_keys_checked(sk, &filter, &original_keys[f], 1, "by sndid, rcvid, address"); + + f = -1; + sk = prepare_test_keys(original_keys); + for (int i = 0; i < original_keys[0].nkeys; i++) { + if (original_keys[i].is_current) { + f = i; + break; + } + } + if (f < 0) + test_error("No current key after adding one"); + filter.is_current = 1; + filter_keys_checked(sk, &filter, &original_keys[f], 1, "by is_current"); + + f = -1; + sk = prepare_test_keys(original_keys); + for (int i = 0; i < original_keys[0].nkeys; i++) { + if (original_keys[i].is_rnext) { + f = i; + break; + } + } + if (f < 0) + test_error("No rnext key after adding one"); + filter.is_rnext = 1; + filter_keys_checked(sk, &filter, &original_keys[f], 1, "by is_rnext"); + + f = -1; + nmatches = 0; + sk = prepare_test_keys(original_keys); + for (int i = 0; i < original_keys[0].nkeys; i++) { + if (original_keys[i].sndid == 100) { + f = i; + memcpy(&expected_keys[nmatches], &original_keys[i], + sizeof(struct tcp_ao_getsockopt)); + nmatches++; + } + } + if (f < 0) + test_error("No key for sndid 100"); + if (nmatches != 2) + test_error("Should have 2 keys with sndid 100"); + filter.rcvid = original_keys[f].rcvid; + filter.sndid = original_keys[f].sndid; + filter.addr.ss_family = test_family; + filter_keys_checked(sk, &filter, expected_keys, nmatches, "by sndid, rcvid"); + + sk = prepare_test_keys(original_keys); + filter.get_all = 1; + filter.nkeys = FILTER_TEST_NKEYS / 2; + len = sizeof(struct tcp_ao_getsockopt); + if (getsockopt(sk, IPPROTO_TCP, TCP_AO_GET_KEYS, &filter, &len)) + test_error("getsockopt"); + if (filter.nkeys == FILTER_TEST_NKEYS) + test_ok("filter keys: correct nkeys when in.nkeys < matched_keys"); + else + test_fail("filter keys: wrong nkeys, expected %u got %u", + FILTER_TEST_NKEYS, filter.nkeys); +} + static void *client_fn(void *arg) { if (inet_pton(TEST_FAMILY, __TEST_CLIENT_IP(2), &tcp_md5_client) != 1) test_error("Can't convert ip address"); extend_tests(); einval_tests(); + filter_tests(); duplicate_tests(); - /* - * TODO: check getsockopt(TCP_AO_GET_KEYS) with different filters - * returning proper nr & keys; - */ return NULL; } int main(int argc, char *argv[]) { - test_init(121, client_fn, NULL); + test_init(126, client_fn, NULL); return 0; } -- 2.43.0

8 months, 2 weeks

3
2
0 0

[PATCH v6 0/5] selftests: kvm: s390: Add ucontrol memory selftests

by Christoph Schlameuss

This patch series adds a some not yet picked selftests to the kvm s390x selftest suite. The additional test cases are covering: * Assert KVM_EXIT_S390_UCONTROL exit on not mapped memory access * Assert functionality of storage keys in ucontrol VM * Assert that memory region operations are rejected for ucontrol VMs Running the test cases requires sys_admin capabilities to start the ucontrol VM. This can be achieved by running as root or with a command like: sudo setpriv --reuid nobody --inh-caps -all,+sys_admin \ --ambient-caps -all,+sys_admin --bounding-set -all,+sys_admin \ ./ucontrol_test --- The patches in this series have been part of the previous patch series. The test cases added here do depend on the fixture added in the earlier patches. From v5 PATCH 7-9 the segment and page table generation has been removed and DAT has been disabled. Since DAT is not necessary to validate the KVM code. https://lore.kernel.org/kvm/20240807154512.316936-1-schlameuss@linux.ibm.co… v6: - add instruction intercept handling for skey specific instructions (iske, sske, rrbe) in addition to kss intercept to work properly on all machines - reorder local variables - fixup some method comments - add a patch correcting the IP.b value length a debug message v5: - rebased to current upstream master - corrected assertion on 0x00 to 0 - reworded fixup commit so that it can be merged on top of current upstream v4: - fix whitespaces in pointer function arguments (thanks Claudio) - fix whitespaces in comments (thanks Janosch) v3: - fix skey assertion (thanks Claudio) - introduce a wrapper around UCAS map and unmap ioctls to improve readability (Claudio) - add an displacement to accessed memory to assert translation intercepts actually point to segments to the uc_map_unmap test - add an misaligned failing mapping try to the uc_map_unmap test v2: - Reenable KSS intercept and handle it within skey test. - Modify the checked register between storing (sske) and reading (iske) it within the test program to make sure the. - Add an additional state assertion in the end of uc_skey - Fix some typos and white spaces. v1: - Remove segment and page table generation and disable DAT. This is not necessary to validate the KVM code. Christoph Schlameuss (5): selftests: kvm: s390: Add uc_map_unmap VM test case selftests: kvm: s390: Add uc_skey VM test case selftests: kvm: s390: Verify reject memory region operations for ucontrol VMs selftests: kvm: s390: Fix whitespace confusion in ucontrol test selftests: kvm: s390: correct IP.b length in uc_handle_sieic debug output .../selftests/kvm/include/s390x/processor.h | 6 + .../selftests/kvm/s390x/ucontrol_test.c | 307 +++++++++++++++++- 2 files changed, 305 insertions(+), 8 deletions(-) base-commit: eca631b8fe808748d7585059c4307005ca5c5820 -- 2.47.0

8 months, 2 weeks

2
11
0 0

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