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[PATCH v7 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-v7 (QEMU branch for testing will be provided in Jason's nesting series) Changelog v7 * Added "Reviewed-by" from Jason * Dropped "select IOMMUFD_DRIVER_CORE" in Kconfig * Decoupled IOMMUFD_DRIVER from IOMMUFD_DRIVER_CORE * Moved vIOMMU negative tests out of FIXTURE_SETUP to a TEST_F * Dropped the "flags" check in iommufd_viommu_alloc_hwpt_nested * Added the kdoc for "flags" in iommufd_viommu_alloc_hwpt_nested v6 https://lore.kernel.org/all/cover.1730313237.git.nicolinc@nvidia.com/ * 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 | 4 + drivers/iommu/iommufd/Makefile | 4 +- drivers/iommu/iommufd/iommufd_private.h | 33 +-- drivers/iommu/iommufd/iommufd_test.h | 2 + include/linux/iommu.h | 14 + include/linux/iommufd.h | 86 ++++++ 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 | 73 ++++- drivers/iommu/iommufd/main.c | 54 ++-- drivers/iommu/iommufd/selftest.c | 266 +++++++++++++----- drivers/iommu/iommufd/viommu.c | 81 ++++++ tools/testing/selftests/iommu/iommufd.c | 137 +++++++++ .../selftests/iommu/iommufd_fail_nth.c | 11 + Documentation/userspace-api/iommufd.rst | 69 ++++- 16 files changed, 804 insertions(+), 152 deletions(-) create mode 100644 drivers/iommu/iommufd/driver.c create mode 100644 drivers/iommu/iommufd/viommu.c base-commit: 0bcceb1f51c77f6b98a7aab00847ed340bf36e35 -- 2.43.0

12 months

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[PATCHv2 net] selftests: wireguard: load nf_conntrack if it's not present

by Hangbin Liu

Some distros may not load nf_conntrack by default, which will cause subsequent nf_conntrack settings to fail. Let's load this module if it's not loaded by default. Fixes: e7096c131e51 ("net: WireGuard secure network tunnel") Signed-off-by: Hangbin Liu <liuhangbin(a)gmail.com> --- v2: load the mode directly in case nf_conntrack is build in (Simon Horman) --- tools/testing/selftests/wireguard/netns.sh | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/wireguard/netns.sh b/tools/testing/selftests/wireguard/netns.sh index 405ff262ca93..fa4dd7eb5918 100755 --- a/tools/testing/selftests/wireguard/netns.sh +++ b/tools/testing/selftests/wireguard/netns.sh @@ -66,6 +66,7 @@ cleanup() { orig_message_cost="$(< /proc/sys/net/core/message_cost)" trap cleanup EXIT printf 0 > /proc/sys/net/core/message_cost +modprobe nf_conntrack ip netns del $netns0 2>/dev/null || true ip netns del $netns1 2>/dev/null || true -- 2.39.5 (Apple Git-154)

1 year

3
2
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[PATCH] selftests/livepatch: Check if CONFIG_LIVEPATCH is enabled

by Siddharth Menon

When CONFIG_LIVEPATCH is disabled, compilation fails due to the required structs from the livepatch header file being undefined. This checks for CONFIG_LIVEPATCH in order to verify that it is enabled before compiling livepatch self-tests. Reviewed-by: Shuah Khan <skhan(a)linuxfoundation.org> Signed-off-by: Siddharth Menon <simeddon(a)gmail.com> --- tools/testing/selftests/livepatch/test_modules/Makefile | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/livepatch/test_modules/Makefile b/tools/testing/selftests/livepatch/test_modules/Makefile index e6e638c4bcba..b34b80544709 100644 --- a/tools/testing/selftests/livepatch/test_modules/Makefile +++ b/tools/testing/selftests/livepatch/test_modules/Makefile @@ -1,5 +1,6 @@ TESTMODS_DIR := $(realpath $(dir $(abspath $(lastword $(MAKEFILE_LIST))))) KDIR ?= /lib/modules/$(shell uname -r)/build +CONFIG_LIVEPATCH := $(shell cd $(KDIR) && scripts/config --state CONFIG_LIVEPATCH) obj-m += test_klp_atomic_replace.o \ test_klp_callbacks_busy.o \ @@ -13,10 +14,15 @@ obj-m += test_klp_atomic_replace.o \ test_klp_shadow_vars.o \ test_klp_syscall.o -# Ensure that KDIR exists, otherwise skip the compilation + +# Ensure that KDIR exists and CONFIG_LIVEPATCH is enabled, else skip compilation modules: ifneq ("$(wildcard $(KDIR))", "") +ifneq ($(filter y m,$(CONFIG_LIVEPATCH)),) $(Q)$(MAKE) -C $(KDIR) modules KBUILD_EXTMOD=$(TESTMODS_DIR) +else + $(warning CONFIG_LIVEPATCH is not enabled in the kernel config file.) +endif endif # Ensure that KDIR exists, otherwise skip the clean target -- 2.39.5

1 year

4
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[PATCH 1/5] selftests/powerpc: Lower run time of count_stcx_fail test

by Michael Ellerman

The count_stcx_fail test runs for close to or just over 2 minutes, which means it sometimes times out. That's overkill for a test that just demonstrates some PMU counters are working. Drop the 64 billion instruction case, to lower the runtime to ~30s. Signed-off-by: Michael Ellerman <mpe(a)ellerman.id.au> --- tools/testing/selftests/powerpc/pmu/count_stcx_fail.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/tools/testing/selftests/powerpc/pmu/count_stcx_fail.c b/tools/testing/selftests/powerpc/pmu/count_stcx_fail.c index 2070a1e2b3a5..d8dd9a9c6c1b 100644 --- a/tools/testing/selftests/powerpc/pmu/count_stcx_fail.c +++ b/tools/testing/selftests/powerpc/pmu/count_stcx_fail.c @@ -144,9 +144,6 @@ static int test_body(void) /* Run for 16Bi instructions */ FAIL_IF(do_count_loop(events, 16000000000, overhead, true)); - /* Run for 64Bi instructions */ - FAIL_IF(do_count_loop(events, 64000000000, overhead, true)); - event_close(&events[0]); event_close(&events[1]); -- 2.47.0

1 year

2
5
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[PATCH v2] selftests/powerpc: Remove the path after initialization.

by zhangjiao2

From: zhang jiao <zhangjiao2(a)cmss.chinamobile.com> If there were no anamolies noted, then we can simply remove the log file and return. Signed-off-by: zhang jiao <zhangjiao2(a)cmss.chinamobile.com> --- v1->v2: Remove the path after initialization. tools/testing/selftests/powerpc/mm/tlbie_test.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/powerpc/mm/tlbie_test.c b/tools/testing/selftests/powerpc/mm/tlbie_test.c index 48344a74b212..35f0098399cc 100644 --- a/tools/testing/selftests/powerpc/mm/tlbie_test.c +++ b/tools/testing/selftests/powerpc/mm/tlbie_test.c @@ -313,16 +313,16 @@ static inline void end_verification_log(unsigned int tid, unsigned nr_anamolies) fclose(f); - if (nr_anamolies == 0) { - remove(path); - return; - } - sprintf(logfile, logfilename, tid); strcpy(path, logdir); strcat(path, separator); strcat(path, logfile); + if (nr_anamolies == 0) { + remove(path); + return; + } + printf("Thread %02d chunk has %d corrupted words. For details check %s\n", tid, nr_anamolies, path); } -- 2.33.0

1 year

3
2
0 0

Nov:16:24

by Van. HR

Hello, I am a private investment consultant representing the interest of a multinational conglomerate that wishes to place funds into a trust management portfolio. Please indicate your interest for additional information. Regards, Van Collin.

1 year

1
0
0 0

[PATCH net-next v23 1/7] 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: Andrew Morton <akpm(a)linux-foundation.org> CC: Alexander Duyck <alexander.duyck(a)gmail.com> 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> --- 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

1 year

4
6
0 0

[PATCH v1] selftest/mm: remove seal_elf

by jeffxu＠chromium.org

From: Jeff Xu <jeffxu(a)chromium.org> Remove seal_elf, which is a demo of mseal, we no longer need this. Signed-off-by: Jeff Xu <jeffxu(a)chromium.org> --- tools/testing/selftests/mm/.gitignore | 1 - tools/testing/selftests/mm/Makefile | 1 - tools/testing/selftests/mm/seal_elf.c | 137 -------------------------- 3 files changed, 139 deletions(-) delete mode 100644 tools/testing/selftests/mm/seal_elf.c diff --git a/tools/testing/selftests/mm/.gitignore b/tools/testing/selftests/mm/.gitignore index 8f01f4da1c0d..6a273bdbc70b 100644 --- a/tools/testing/selftests/mm/.gitignore +++ b/tools/testing/selftests/mm/.gitignore @@ -49,7 +49,6 @@ va_high_addr_switch hugetlb_fault_after_madv hugetlb_madv_vs_map mseal_test -seal_elf droppable hugetlb_dio pkey_sighandler_tests_32 diff --git a/tools/testing/selftests/mm/Makefile b/tools/testing/selftests/mm/Makefile index 72ec4403032d..869b6a40f290 100644 --- a/tools/testing/selftests/mm/Makefile +++ b/tools/testing/selftests/mm/Makefile @@ -64,7 +64,6 @@ TEST_GEN_FILES += mrelease_test TEST_GEN_FILES += mremap_dontunmap TEST_GEN_FILES += mremap_test TEST_GEN_FILES += mseal_test -TEST_GEN_FILES += seal_elf TEST_GEN_FILES += on-fault-limit TEST_GEN_FILES += pagemap_ioctl TEST_GEN_FILES += thuge-gen diff --git a/tools/testing/selftests/mm/seal_elf.c b/tools/testing/selftests/mm/seal_elf.c deleted file mode 100644 index d9f8ba8d5050..000000000000 --- a/tools/testing/selftests/mm/seal_elf.c +++ /dev/null @@ -1,137 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -#define _GNU_SOURCE -#include <sys/mman.h> -#include <stdint.h> -#include <asm-generic/unistd.h> -#include <string.h> -#include <sys/time.h> -#include <sys/resource.h> -#include <stdbool.h> -#include "../kselftest.h" -#include <syscall.h> -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <fcntl.h> -#include <sys/ioctl.h> -#include <sys/vfs.h> -#include <sys/stat.h> -#include "mseal_helpers.h" - -/* - * define sys_xyx to call syscall directly. - */ -static int sys_mseal(void *start, size_t len) -{ - int sret; - - errno = 0; - sret = syscall(__NR_mseal, start, len, 0); - return sret; -} - -static inline int sys_mprotect(void *ptr, size_t size, unsigned long prot) -{ - int sret; - - errno = 0; - sret = syscall(__NR_mprotect, ptr, size, prot); - return sret; -} - -static bool seal_support(void) -{ - int ret; - void *ptr; - unsigned long page_size = getpagesize(); - - ptr = mmap(NULL, page_size, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); - if (ptr == (void *) -1) - return false; - - ret = sys_mseal(ptr, page_size); - if (ret < 0) - return false; - - return true; -} - -const char somestr[4096] = {"READONLY"}; - -static void test_seal_elf(void) -{ - int ret; - FILE *maps; - char line[512]; - uintptr_t addr_start, addr_end; - char prot[5]; - char filename[256]; - unsigned long page_size = getpagesize(); - unsigned long long ptr = (unsigned long long) somestr; - char *somestr2 = (char *)somestr; - - /* - * Modify the protection of readonly somestr - */ - if (((unsigned long long)ptr % page_size) != 0) - ptr = (unsigned long long)ptr & ~(page_size - 1); - - ksft_print_msg("somestr = %s\n", somestr); - ksft_print_msg("change protection to rw\n"); - ret = sys_mprotect((void *)ptr, page_size, PROT_READ|PROT_WRITE); - FAIL_TEST_IF_FALSE(!ret); - *somestr2 = 'A'; - ksft_print_msg("somestr is modified to: %s\n", somestr); - ret = sys_mprotect((void *)ptr, page_size, PROT_READ); - FAIL_TEST_IF_FALSE(!ret); - - maps = fopen("/proc/self/maps", "r"); - FAIL_TEST_IF_FALSE(maps); - - /* - * apply sealing to elf binary - */ - while (fgets(line, sizeof(line), maps)) { - if (sscanf(line, "%lx-%lx %4s %*x %*x:%*x %*u %255[^\n]", - &addr_start, &addr_end, prot, filename) == 4) { - if (strlen(filename)) { - /* - * seal the mapping if read only. - */ - if (strstr(prot, "r-")) { - ret = sys_mseal((void *)addr_start, addr_end - addr_start); - FAIL_TEST_IF_FALSE(!ret); - ksft_print_msg("sealed: %lx-%lx %s %s\n", - addr_start, addr_end, prot, filename); - if ((uintptr_t) somestr >= addr_start && - (uintptr_t) somestr <= addr_end) - ksft_print_msg("mapping for somestr found\n"); - } - } - } - } - fclose(maps); - - ret = sys_mprotect((void *)ptr, page_size, PROT_READ | PROT_WRITE); - FAIL_TEST_IF_FALSE(ret < 0); - ksft_print_msg("somestr is sealed, mprotect is rejected\n"); - - REPORT_TEST_PASS(); -} - -int main(int argc, char **argv) -{ - bool test_seal = seal_support(); - - ksft_print_header(); - ksft_print_msg("pid=%d\n", getpid()); - - if (!test_seal) - ksft_exit_skip("sealing not supported, check CONFIG_64BIT\n"); - - ksft_set_plan(1); - - test_seal_elf(); - - ksft_finished(); -} -- 2.47.0.338.g60cca15819-goog

1 year

1
0
0 0

[PATCH net-next v3 0/6] net: Improve netns handling in RTNL and ip_tunnel

by Xiao Liang

This patch series includes some netns-related improvements and fixes for RTNL and ip_tunnel, to make link creation more intuitive: - Creating link in another net namespace doesn't conflict with link names in current one. - Refector rtnetlink link creation. Create link in target namespace directly. Pass both source and link netns to drivers via newlink() callback. So that # ip link add netns ns1 link-netns ns2 tun0 type gre ... will create tun0 in ns1, rather than create it in ns2 and move to ns1. And don't conflict with another interface named "tun0" in current netns. Patch 1 from Donald is included just as a dependency. --- v3: - Drop "netns_atomic" flag and module parameter. Add netns parameter to newlink() instead, and convert drivers accordingly. - Move python NetNSEnter helper to net selftest lib. v2: link: https://lore.kernel.org/all/20241107133004.7469-1-shaw.leon@gmail.com/ - Check NLM_F_EXCL to ensure only link creation is affected. - Add self tests for link name/ifindex conflict and notifications in different netns. - Changes in dummy driver and ynl in order to add the test case. v1: link: https://lore.kernel.org/all/20241023023146.372653-1-shaw.leon@gmail.com/ Donald Hunter (1): Revert "tools/net/ynl: improve async notification handling" Xiao Liang (5): net: ip_tunnel: Build flow in underlay net namespace rtnetlink: Lookup device in target netns when creating link rtnetlink: Decouple net namespaces in rtnl_newlink_create() selftests: net: Add python context manager for netns entering selftests: net: Add two test cases for link netns drivers/infiniband/ulp/ipoib/ipoib_netlink.c | 6 ++- drivers/net/amt.c | 6 +-- drivers/net/bareudp.c | 4 +- drivers/net/bonding/bond_netlink.c | 3 +- drivers/net/can/dev/netlink.c | 2 +- drivers/net/can/vxcan.c | 4 +- .../ethernet/qualcomm/rmnet/rmnet_config.c | 5 +- drivers/net/geneve.c | 4 +- drivers/net/gtp.c | 4 +- drivers/net/ipvlan/ipvlan.h | 2 +- drivers/net/ipvlan/ipvlan_main.c | 5 +- drivers/net/ipvlan/ipvtap.c | 4 +- drivers/net/macsec.c | 5 +- drivers/net/macvlan.c | 5 +- drivers/net/macvtap.c | 5 +- drivers/net/netkit.c | 4 +- drivers/net/pfcp.c | 4 +- drivers/net/ppp/ppp_generic.c | 4 +- drivers/net/team/team_core.c | 2 +- drivers/net/veth.c | 4 +- drivers/net/vrf.c | 2 +- drivers/net/vxlan/vxlan_core.c | 4 +- drivers/net/wireguard/device.c | 4 +- drivers/net/wireless/virtual/virt_wifi.c | 5 +- drivers/net/wwan/wwan_core.c | 6 ++- include/net/ip_tunnels.h | 5 +- include/net/rtnetlink.h | 22 ++++++++- net/8021q/vlan_netlink.c | 5 +- net/batman-adv/soft-interface.c | 5 +- net/bridge/br_netlink.c | 2 +- net/caif/chnl_net.c | 2 +- net/core/rtnetlink.c | 25 ++++++---- net/hsr/hsr_netlink.c | 8 +-- net/ieee802154/6lowpan/core.c | 5 +- net/ipv4/ip_gre.c | 13 +++-- net/ipv4/ip_tunnel.c | 16 +++--- net/ipv4/ip_vti.c | 5 +- net/ipv4/ipip.c | 5 +- net/ipv6/ip6_gre.c | 17 ++++--- net/ipv6/ip6_tunnel.c | 11 ++--- net/ipv6/ip6_vti.c | 11 ++--- net/ipv6/sit.c | 11 ++--- net/xfrm/xfrm_interface_core.c | 13 +++-- tools/net/ynl/cli.py | 10 ++-- tools/net/ynl/lib/ynl.py | 49 ++++++++----------- tools/testing/selftests/net/Makefile | 1 + .../testing/selftests/net/lib/py/__init__.py | 2 +- tools/testing/selftests/net/lib/py/netns.py | 18 +++++++ tools/testing/selftests/net/netns-name.sh | 10 ++++ tools/testing/selftests/net/netns_atomic.py | 38 ++++++++++++++ 50 files changed, 255 insertions(+), 157 deletions(-) create mode 100755 tools/testing/selftests/net/netns_atomic.py -- 2.47.0

1 year

2
7
0 0

[PATCH] kunit: debugfs: Use IS_ERR() for alloc_string_stream() error check

by Kuan-Wei Chiu

The alloc_string_stream() function only returns ERR_PTR(-ENOMEM) on failure and never returns NULL. Therefore, switching the error check in the caller from IS_ERR_OR_NULL to IS_ERR improves clarity, indicating that this function will return an error pointer (not NULL) when an error occurs. This change avoids any ambiguity regarding the function's return behavior. Link: https://lore.kernel.org/lkml/Zy9deU5VK3YR+r9N@visitorckw-System-Product-Name Signed-off-by: Kuan-Wei Chiu <visitorckw(a)gmail.com> --- lib/kunit/debugfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/kunit/debugfs.c b/lib/kunit/debugfs.c index d548750a325a..6273fa9652df 100644 --- a/lib/kunit/debugfs.c +++ b/lib/kunit/debugfs.c @@ -181,7 +181,7 @@ void kunit_debugfs_create_suite(struct kunit_suite *suite) * successfully. */ stream = alloc_string_stream(GFP_KERNEL); - if (IS_ERR_OR_NULL(stream)) + if (IS_ERR(stream)) return; string_stream_set_append_newlines(stream, true); @@ -189,7 +189,7 @@ void kunit_debugfs_create_suite(struct kunit_suite *suite) kunit_suite_for_each_test_case(suite, test_case) { stream = alloc_string_stream(GFP_KERNEL); - if (IS_ERR_OR_NULL(stream)) + if (IS_ERR(stream)) goto err; string_stream_set_append_newlines(stream, true); -- 2.34.1

1 year

2
1
0 0

[PATCH v2] kunit: Fix potential null dereference in kunit_device_driver_test()

by Gax-c

From: Zichen Xie <zichenxie0106(a)gmail.com> kunit_kzalloc() may return a NULL pointer, dereferencing it without NULL check may lead to NULL dereference. Add a NULL check for test_state. Fixes: d03c720e03bd ("kunit: Add APIs for managing devices") Signed-off-by: Zichen Xie <zichenxie0106(a)gmail.com> Cc: stable(a)vger.kernel.org --- v2: Add Cc tag. --- lib/kunit/kunit-test.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/lib/kunit/kunit-test.c b/lib/kunit/kunit-test.c index 37e02be1e710..d9c781c859fd 100644 --- a/lib/kunit/kunit-test.c +++ b/lib/kunit/kunit-test.c @@ -805,6 +805,8 @@ static void kunit_device_driver_test(struct kunit *test) struct device *test_device; struct driver_test_state *test_state = kunit_kzalloc(test, sizeof(*test_state), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, test_state); + test->priv = test_state; test_driver = kunit_driver_create(test, "my_driver"); -- 2.34.1

1 year

2
1
0 0

[PATCH v1] MAINTAINERS: Update KUnit email address for Brendan Higgins

by Brendan Higgins

Update Brendan's email address for the KUnit entry. Signed-off-by: Brendan Higgins <brendanhiggins(a)google.com> --- I am leaving Google and am going through and cleaning up my @google.com address in the relevant places. This patch updates my email address for the KUnit entry. I am removing myself from the ASPEED I2C entry in a separate patch. Do note that Friday, November 15 2024 is my last day at Google after which I will lose access to this email account so any future updates or comments after Friday will come from my @linux.dev account. --- MAINTAINERS | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/MAINTAINERS b/MAINTAINERS index b878ddc99f94e..d077a3deeb386 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12405,7 +12405,7 @@ F: fs/smb/common/ F: fs/smb/server/ KERNEL UNIT TESTING FRAMEWORK (KUnit) -M: Brendan Higgins <brendanhiggins(a)google.com> +M: Brendan Higgins <brendan.higgins(a)linux.dev> M: David Gow <davidgow(a)google.com> R: Rae Moar <rmoar(a)google.com> L: linux-kselftest(a)vger.kernel.org base-commit: cfaaa7d010d1fc58f9717fcc8591201e741d2d49 -- 2.47.0.338.g60cca15819-goog

1 year

2
1
0 0

[RFC PATCH v3 0/6] Direct Map Removal for guest_memfd

by Patrick Roy

Unmapping virtual machine guest memory from the host kernel's direct map is a successful mitigation against Spectre-style transient execution issues: If the kernel page tables do not contain entries pointing to guest memory, then any attempted speculative read through the direct map will necessarily be blocked by the MMU before any observable microarchitectural side-effects happen. This means that Spectre-gadgets and similar cannot be used to target virtual machine memory. Roughly 60% of speculative execution issues fall into this category [1, Table 1]. This patch series extends guest_memfd with the ability to remove its memory from the host kernel's direct map, to be able to attain the above protection for KVM guests running inside guest_memfd. === Changes to v2 === - Handle direct map removal for physically contiguous pages in arch code (Mike R.) - Track the direct map state in guest_memfd itself instead of at the folio level, to prepare for huge pages support (Sean C.) - Allow configuring direct map state of not-yet faulted in memory (Vishal A.) - Pay attention to alignment in ftrace structs (Steven R.) Most significantly, I've reduced the patch series to focus only on direct map removal for guest_memfd for now, leaving the whole "how to do non-CoCo VMs in guest_memfd" for later. If this separation is acceptable, then I think I can drop the RFC tag in the next revision (I've mainly kept it here because I'm not entirely sure what to do with patches 3 and 4). === Implementation === This patch series introduces a new flag to the KVM_CREATE_GUEST_MEMFD that causes guest_memfd to remove its pages from the host kernel's direct map immediately after population/preparation. It also adds infrastructure for tracking the direct map state of all gmem folios inside the guest_memfd inode. Storing this information in the inode has the advantage that the code is ready for future hugepages extensions, where only removing/reinserting direct map entries for sub-ranges of a huge folio is a valid usecase, and it allows pre-configuring the direct map state of not-yet faulted in parts of memory (for example, when the VMM is receiving a RX virtio buffer from the guest). === Summary === Patch 1 (from Mike Rapoport) adds arch APIs for manipulating the direct map for ranges of physically contiguous pages, which are used by guest_memfd in follow up patches. Patch 2 adds the KVM_GMEM_NO_DIRECT_MAP flag and the logic for configuring direct map state of freshly prepared folios. Patches 3 and 4 mainly serve an illustrative purpose, to show how the framework from patch 2 can be extended with routines for runtime direct map manipulation. Patches 5 and 6 deal with documentation and self-tests respectively. [1]: https://download.vusec.net/papers/quarantine_raid23.pdf [RFC v1]: https://lore.kernel.org/kvm/20240709132041.3625501-1-roypat@amazon.co.uk/ [RFC v2]: https://lore.kernel.org/kvm/20240910163038.1298452-1-roypat@amazon.co.uk/ Mike Rapoport (Microsoft) (1): arch: introduce set_direct_map_valid_noflush() Patrick Roy (5): kvm: gmem: add flag to remove memory from kernel direct map kvm: gmem: implement direct map manipulation routines kvm: gmem: add trace point for direct map state changes kvm: document KVM_GMEM_NO_DIRECT_MAP flag kvm: selftests: run gmem tests with KVM_GMEM_NO_DIRECT_MAP set Documentation/virt/kvm/api.rst | 14 + arch/arm64/include/asm/set_memory.h | 1 + arch/arm64/mm/pageattr.c | 10 + arch/loongarch/include/asm/set_memory.h | 1 + arch/loongarch/mm/pageattr.c | 21 ++ arch/riscv/include/asm/set_memory.h | 1 + arch/riscv/mm/pageattr.c | 15 + arch/s390/include/asm/set_memory.h | 1 + arch/s390/mm/pageattr.c | 11 + arch/x86/include/asm/set_memory.h | 1 + arch/x86/mm/pat/set_memory.c | 8 + include/linux/set_memory.h | 6 + include/trace/events/kvm.h | 22 ++ include/uapi/linux/kvm.h | 2 + .../testing/selftests/kvm/guest_memfd_test.c | 2 +- .../kvm/x86_64/private_mem_conversions_test.c | 7 +- virt/kvm/guest_memfd.c | 280 +++++++++++++++++- 17 files changed, 384 insertions(+), 19 deletions(-) base-commit: 5cb1659f412041e4780f2e8ee49b2e03728a2ba6 -- 2.47.0

1 year

9
35
0 0

LKFT CI: improving Networking selftests results when validating stable kernels

by Matthieu Baerts

Hello LKFT maintainers, CI operators, First, I would like to say thank you to the people behind the LKFT project for validating stable kernels (and more), and including some Network selftests in their tests suites. A lot of improvements around the networking kselftests have been done this year. At the last Netconf [1], we discussed how these tests were validated on stable kernels from CIs like the LKFT one, and we have some suggestions to improve the situation. KSelftests from the same version -------------------------------- According to the doc [2], kselftests should support all previous kernel versions. The LKFT CI is then using the kselftests from the last stable release to validate all stable versions. Even if there are good reasons to do that, we would like to ask for an opt-out for this policy for the networking tests: this is hard to maintain with the increased complexity, hard to validate on all stable kernels before applying patches, and hard to put in place in some situations. As a result, many tests are failing on older kernels, and it looks like it is a lot of work to support older kernels, and to maintain this. Many networking tests are validating the internal behaviour that is not exposed to the userspace. A typical example: some tests look at the raw packets being exchanged during a test, and this behaviour can change without modifying how the userspace is interacting with the kernel. The kernel could expose capabilities, but that's not something that seems natural to put in place for internal behaviours that are not exposed to end users. Maybe workarounds could be used, e.g. looking at kernel symbols, etc. Nut that doesn't always work, increase the complexity, and often "false positive" issue will be noticed only after a patch hits stable, and will cause a bunch of tests to be ignored. Regarding fixes, ideally they will come with a new or modified test that can also be backported. So the coverage can continue to grow in stable versions too. Do you think that from the kernel v6.12 (or before?), the LKFT CI could run the networking kselftests from the version that is being validated, and not from a newer one? So validating the selftests from v6.12.1 on a v6.12.1, and not the ones from a future v6.16.y on a v6.12.42. Skipped tests ------------- It looks like many tests are skipped: - Some have been in a skip file [3] for a while: maybe they can be removed? - Some are skipped because of missing tools: maybe they can be added? e.g. iputils, tshark, ipv6toolkit, etc. - Some tests are in 'net', but in subdirectories, and hence not tested, e.g. forwarding, packetdrill, netfilter, tcp_ao. Could they be tested too? How can we change this to increase the code coverage using existing tests? KVM --- It looks like different VMs are being used to execute the different tests. Do these VMs benefit from any accelerations like KVM? If not, some tests might fail because the environment is too slow. The KSFT_MACHINE_SLOW=yes env var can be set to increase some tolerances, timeout or to skip some parts, but that might not be enough for some tests. Notifications ------------- In case of new regressions, who is being notified? Are the people from the MAINTAINERS file, and linked to the corresponding selftests being notified or do they need to do the monitoring on their side? Looking forward to improving the networking selftests results when validating stable kernels! [1] https://netdev.bots.linux.dev/netconf/2024/ [2] https://docs.kernel.org/dev-tools/kselftest.html [3] https://github.com/Linaro/test-definitions/blob/master/automated/linux/ksel… Cheers, Matt -- Sponsored by the NGI0 Core fund.

1 year

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[PATCH] kunit: Fix potential null dereference in kunit_device_driver_test()

by Gax-c

From: Zichen Xie <zichenxie0106(a)gmail.com> kunit_kzalloc() may return a NULL pointer, dereferencing it without NULL check may lead to NULL dereference. Add a NULL check for test_state. Fixes: d03c720e03bd ("kunit: Add APIs for managing devices") Signed-off-by: Zichen Xie <zichenxie0106(a)gmail.com> --- lib/kunit/kunit-test.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/lib/kunit/kunit-test.c b/lib/kunit/kunit-test.c index 37e02be1e710..d9c781c859fd 100644 --- a/lib/kunit/kunit-test.c +++ b/lib/kunit/kunit-test.c @@ -805,6 +805,8 @@ static void kunit_device_driver_test(struct kunit *test) struct device *test_device; struct driver_test_state *test_state = kunit_kzalloc(test, sizeof(*test_state), GFP_KERNEL); + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, test_state); + test->priv = test_state; test_driver = kunit_driver_create(test, "my_driver"); -- 2.34.1

1 year

2
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[PATCH v8 00/29] 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 in -next. 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… --- changelog --------- v8: - rebased on palmer/for-next - dropped samuel holland's `envcfg` context switch patches. they are in parlmer/for-next v7: - Removed "riscv/Kconfig: enable HAVE_EXIT_THREAD for riscv" Instead using `deactivate_mm` flow to clean up. see here for more context https://lore.kernel.org/all/20230908203655.543765-1-rick.p.edgecombe@intel.… - Changed the header include in `kselftest`. Hopefully this fixes compile issue faced by Zong Li at SiFive. - Cleaned up an orphaned change to `mm/mmap.c` in below patch "riscv/mm : ensure PROT_WRITE leads to VM_READ | VM_WRITE" - Lock interfaces for shadow stack and indirect branch tracking expect arg == 0 Any future evolution of this interface should accordingly define how arg should be setup. - `mm/map.c` has an instance of using `VM_SHADOW_STACK`. Fixed it to use helper `is_shadow_stack_vma`. - Link to v6: https://lore.kernel.org/r/20241008-v5_user_cfi_series-v6-0-60d9fe073f37@riv… 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. --- Changes in v8: - EDITME: describe what is new in this series revision. - EDITME: use bulletpoints and terse descriptions. - Link to v7: https://lore.kernel.org/r/20241029-v5_user_cfi_series-v7-0-2727ce9936cb@riv… --- Andy Chiu (1): riscv: signal: abstract header saving for setup_sigcontext Clément Léger (1): riscv: Add Firmware Feature SBI extensions definitions Deepak Gupta (25): mm: helper `is_shadow_stack_vma` to check shadow stack vma 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 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 | 20 + arch/riscv/include/asm/asm-prototypes.h | 1 + arch/riscv/include/asm/cpufeature.h | 13 + 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/mmu_context.h | 7 + arch/riscv/include/asm/pgtable.h | 30 +- arch/riscv/include/asm/processor.h | 2 + arch/riscv/include/asm/sbi.h | 27 ++ 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 | 2 + arch/riscv/kernel/entry.S | 31 +- arch/riscv/kernel/head.S | 12 + arch/riscv/kernel/process.c | 26 +- arch/riscv/kernel/ptrace.c | 83 ++++ arch/riscv/kernel/signal.c | 140 +++++- 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 | 2 +- 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 ++ 54 files changed, 2171 insertions(+), 35 deletions(-) --- base-commit: 64f7b77f0bd9271861ed9e410e9856b6b0b21c48 change-id: 20240930-v5_user_cfi_series-3dc332f8f5b2 -- - debug

1 year

2
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[PATCH net 2/2] selftests: net: test extacks in netlink dumps

by Jakub Kicinski

Test that extacks in dumps work. The test fills up the receive buffer to test both the inline dump (as part of sendmsg()) and delayed one (run during recvmsg()). Use YNL helpers to parse the messages. We need to add the test to YNL file to make sure the right include path are used. Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> --- CC: linux-kselftest(a)vger.kernel.org --- tools/testing/selftests/net/Makefile | 3 +- tools/testing/selftests/net/netlink-dumps.c | 129 ++++++++++++++++++++ 2 files changed, 130 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index 5e86f7a51b43..c427ee32b193 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -78,7 +78,6 @@ TEST_PROGS += test_vxlan_vnifiltering.sh TEST_GEN_FILES += io_uring_zerocopy_tx TEST_PROGS += io_uring_zerocopy_tx.sh TEST_GEN_FILES += bind_bhash -TEST_GEN_PROGS += netlink-dumps TEST_GEN_PROGS += sk_bind_sendto_listen TEST_GEN_PROGS += sk_connect_zero_addr TEST_GEN_PROGS += sk_so_peek_off @@ -100,7 +99,7 @@ TEST_PROGS += bpf_offload.py # YNL files, must be before "include ..lib.mk" EXTRA_CLEAN += $(OUTPUT)/libynl.a -YNL_GEN_FILES := ncdevmem +YNL_GEN_FILES := ncdevmem netlink-dumps TEST_GEN_FILES += $(YNL_GEN_FILES) TEST_FILES := settings diff --git a/tools/testing/selftests/net/netlink-dumps.c b/tools/testing/selftests/net/netlink-dumps.c index 7ee6dcd334df..195febbf6a61 100644 --- a/tools/testing/selftests/net/netlink-dumps.c +++ b/tools/testing/selftests/net/netlink-dumps.c @@ -12,11 +12,140 @@ #include <unistd.h> #include <linux/genetlink.h> +#include <linux/neighbour.h> +#include <linux/netdevice.h> #include <linux/netlink.h> #include <linux/mqueue.h> +#include <linux/rtnetlink.h> #include "../kselftest_harness.h" +#include <ynl.h> + +struct ext_ack { + int err; + + __u32 attr_offs; + __u32 miss_type; + __u32 miss_nest; + const char *str; +}; + +/* 0: no done, 1: done found, 2: extack found, -1: error */ +static int nl_get_extack(char *buf, size_t n, struct ext_ack *ea) +{ + const struct nlmsghdr *nlh; + const struct nlattr *attr; + ssize_t rem; + + for (rem = n; rem > 0; NLMSG_NEXT(nlh, rem)) { + nlh = (struct nlmsghdr *)&buf[n - rem]; + if (!NLMSG_OK(nlh, rem)) + return -1; + + if (nlh->nlmsg_type != NLMSG_DONE) + continue; + + ea->err = -*(int *)NLMSG_DATA(nlh); + + if (!(nlh->nlmsg_flags & NLM_F_ACK_TLVS)) + return 1; + + ynl_attr_for_each(attr, nlh, sizeof(int)) { + switch (ynl_attr_type(attr)) { + case NLMSGERR_ATTR_OFFS: + ea->attr_offs = ynl_attr_get_u32(attr); + break; + case NLMSGERR_ATTR_MISS_TYPE: + ea->miss_type = ynl_attr_get_u32(attr); + break; + case NLMSGERR_ATTR_MISS_NEST: + ea->miss_nest = ynl_attr_get_u32(attr); + break; + case NLMSGERR_ATTR_MSG: + ea->str = ynl_attr_get_str(attr); + break; + } + } + + return 2; + } + + return 0; +} + +static const struct { + struct nlmsghdr nlhdr; + struct ndmsg ndm; + struct nlattr ahdr; + __u32 val; +} dump_neigh_bad = { + .nlhdr = { + .nlmsg_len = sizeof(dump_neigh_bad), + .nlmsg_type = RTM_GETNEIGH, + .nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_DUMP, + .nlmsg_seq = 1, + }, + .ndm = { + .ndm_family = 123, + }, + .ahdr = { + .nla_len = 4 + 4, + .nla_type = NDA_FLAGS_EXT, + }, + .val = -1, // should fail MASK validation +}; + +TEST(dump_extack) +{ + int netlink_sock; + char buf[8192]; + int one = 1; + int i, cnt; + ssize_t n; + + netlink_sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); + ASSERT_GE(netlink_sock, 0); + + n = setsockopt(netlink_sock, SOL_NETLINK, NETLINK_CAP_ACK, + &one, sizeof(one)); + ASSERT_EQ(n, 0); + n = setsockopt(netlink_sock, SOL_NETLINK, NETLINK_EXT_ACK, + &one, sizeof(one)); + ASSERT_EQ(n, 0); + n = setsockopt(netlink_sock, SOL_NETLINK, NETLINK_GET_STRICT_CHK, + &one, sizeof(one)); + ASSERT_EQ(n, 0); + + /* Dump so many times we fill up the buffer */ + cnt = 64; + for (i = 0; i < cnt; i++) { + n = send(netlink_sock, &dump_neigh_bad, + sizeof(dump_neigh_bad), 0); + ASSERT_EQ(n, sizeof(dump_neigh_bad)); + } + + /* Read out the ENOBUFS */ + n = recv(netlink_sock, buf, sizeof(buf), MSG_DONTWAIT); + EXPECT_EQ(n, -1); + EXPECT_EQ(errno, ENOBUFS); + + for (i = 0; i < cnt; i++) { + struct ext_ack ea = {}; + + n = recv(netlink_sock, buf, sizeof(buf), MSG_DONTWAIT); + if (n < 0) { + ASSERT_GE(i, 10); + break; + } + ASSERT_GE(n, (ssize_t)sizeof(struct nlmsghdr)); + + EXPECT_EQ(nl_get_extack(buf, n, &ea), 2); + EXPECT_EQ(ea.attr_offs, + sizeof(struct nlmsghdr) + sizeof(struct ndmsg)); + } +} + static const struct { struct nlmsghdr nlhdr; struct genlmsghdr genlhdr; -- 2.47.0

1 year

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[PATCH net-next v4 7/7] 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: v4: - Adjust the sleep around the FDB op --- 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 | 96 +++++++++++++++++++++++ tools/testing/selftests/net/lib.sh | 17 ++++ 3 files changed, 114 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 2b2a5ec7fa6a..d1494700f501 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..c03151e7791c --- /dev/null +++ b/tools/testing/selftests/net/fdb_notify.sh @@ -0,0 +1,96 @@ +#!/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 $! + + sleep 0.5 + bridge fdb "$op" 00:11:22:33:44:55 vlan 1 "$@" + sleep 0.5 + defer_scope_pop + + local count=$(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

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[PATCH net-next v4 6/7] 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> Reviewed-by: Amit Cohen <amcohen(a)nvidia.com> --- 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

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[PATCH net-next v4 5/7] 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

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[PATCH net-next v4 4/7] 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

1 year

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[PATCH net-next v4 3/7] 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

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[PATCH net-next v1 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

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[PATCH] net/unix: pass pidfd flags via SCM_PIDFD cmsg

by Stas Sergeev

Currently SCM_PIDFD cmsg cannot be sent via unix socket (returns -EINVAL) and SO_PASSPIDFD doesn't support flags. The created pidfd always has flags set to 0. This patch implements SCM_PIDFD cmsg in AF_UNIX socket, which can be used to send flags to SO_PASSPIDFD-enabled recipient. Self-test is added for the propagation of PIDFD_NONBLOCK flag. This is mainly needed for the future extensions, like eg this one: https://lore.kernel.org/lkml/8288a08e-448b-43c2-82dc-59f87d0d9072@yandex.ru… where it was suggested to try solving the supplementary groups problem with pidfd. Signed-off-by: Stas Sergeev <stsp2(a)yandex.ru> 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: Simon Horman <horms(a)kernel.org> CC: Shuah Khan <shuah(a)kernel.org> CC: Christian Brauner <brauner(a)kernel.org> CC: Jens Axboe <axboe(a)kernel.dk> CC: Willem de Bruijn <willemb(a)google.com> CC: Pavel Begunkov <asml.silence(a)gmail.com> CC: Gabriel Krisman Bertazi <krisman(a)suse.de> CC: Mina Almasry <almasrymina(a)google.com> CC: Oleg Nesterov <oleg(a)redhat.com> CC: Tycho Andersen <tandersen(a)netflix.com> CC: Al Viro <viro(a)zeniv.linux.org.uk> CC: Kuniyuki Iwashima <kuniyu(a)amazon.com> CC: Gou Hao <gouhao(a)uniontech.com> CC: Abhishek Chauhan <quic_abchauha(a)quicinc.com> CC: Michal Luczaj <mhal(a)rbox.co> CC: Kees Cook <kees(a)kernel.org> CC: linux-kernel(a)vger.kernel.org CC: netdev(a)vger.kernel.org CC: linux-kselftest(a)vger.kernel.org --- include/linux/pidfs.h | 9 +++ include/linux/socket.h | 2 +- include/net/af_unix.h | 1 + include/net/scm.h | 10 ++- kernel/pid.c | 6 +- net/core/scm.c | 14 ++++ net/core/sock.c | 1 + net/unix/af_unix.c | 3 + .../testing/selftests/net/af_unix/scm_pidfd.c | 70 +++++++++++++++++-- 9 files changed, 106 insertions(+), 10 deletions(-) diff --git a/include/linux/pidfs.h b/include/linux/pidfs.h index 75bdf9807802..c4c5c1a0c2ad 100644 --- a/include/linux/pidfs.h +++ b/include/linux/pidfs.h @@ -2,7 +2,16 @@ #ifndef _LINUX_PID_FS_H #define _LINUX_PID_FS_H +#include <uapi/linux/pidfd.h> + struct file *pidfs_alloc_file(struct pid *pid, unsigned int flags); void __init pidfs_init(void); +static inline int pidfd_validate_flags(unsigned int flags) +{ + if (flags & ~(PIDFD_NONBLOCK | PIDFD_THREAD)) + return -EINVAL; + return 0; +} + #endif /* _LINUX_PID_FS_H */ diff --git a/include/linux/socket.h b/include/linux/socket.h index d18cc47e89bd..ee27d391e5aa 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -178,7 +178,7 @@ static inline size_t msg_data_left(struct msghdr *msg) #define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */ #define SCM_CREDENTIALS 0x02 /* rw: struct ucred */ #define SCM_SECURITY 0x03 /* rw: security label */ -#define SCM_PIDFD 0x04 /* ro: pidfd (int) */ +#define SCM_PIDFD 0x04 /* r: pidfd, w: pidfd_flags (int) */ struct ucred { __u32 pid; diff --git a/include/net/af_unix.h b/include/net/af_unix.h index 63129c79b8cb..4bc197548c2f 100644 --- a/include/net/af_unix.h +++ b/include/net/af_unix.h @@ -62,6 +62,7 @@ struct unix_skb_parms { #ifdef CONFIG_SECURITY_NETWORK u32 secid; /* Security ID */ #endif + u32 pidfd_flags; u32 consumed; } __randomize_layout; diff --git a/include/net/scm.h b/include/net/scm.h index 0d35c7c77a74..bc64d516b226 100644 --- a/include/net/scm.h +++ b/include/net/scm.h @@ -8,6 +8,7 @@ #include <linux/file.h> #include <linux/security.h> #include <linux/pid.h> +#include <linux/pidfs.h> #include <linux/nsproxy.h> #include <linux/sched/signal.h> #include <net/compat.h> @@ -48,6 +49,7 @@ struct scm_cookie { #ifdef CONFIG_SECURITY_NETWORK u32 secid; /* Passed security ID */ #endif + u32 pidfd_flags; }; void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm); @@ -137,6 +139,7 @@ static __inline__ void scm_pidfd_recv(struct msghdr *msg, struct scm_cookie *scm { struct file *pidfd_file = NULL; int len, pidfd; + int err; /* put_cmsg() doesn't return an error if CMSG is truncated, * that's why we need to opencode these checks here. @@ -154,7 +157,12 @@ static __inline__ void scm_pidfd_recv(struct msghdr *msg, struct scm_cookie *scm if (!scm->pid) return; - pidfd = pidfd_prepare(scm->pid, 0, &pidfd_file); + err = pidfd_validate_flags(scm->pidfd_flags); + if (err) { + msg->msg_flags |= MSG_CTRUNC; + return; + } + pidfd = pidfd_prepare(scm->pid, scm->pidfd_flags, &pidfd_file); if (put_cmsg(msg, SOL_SOCKET, SCM_PIDFD, sizeof(int), &pidfd)) { if (pidfd_file) { diff --git a/kernel/pid.c b/kernel/pid.c index 2715afb77eab..b1100ae8ea63 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -629,10 +629,12 @@ static int pidfd_create(struct pid *pid, unsigned int flags) SYSCALL_DEFINE2(pidfd_open, pid_t, pid, unsigned int, flags) { int fd; + int err; struct pid *p; - if (flags & ~(PIDFD_NONBLOCK | PIDFD_THREAD)) - return -EINVAL; + err = pidfd_validate_flags(flags); + if (err) + return err; if (pid <= 0) return -EINVAL; diff --git a/net/core/scm.c b/net/core/scm.c index 4f6a14babe5a..3bcdecdacd7e 100644 --- a/net/core/scm.c +++ b/net/core/scm.c @@ -23,6 +23,7 @@ #include <linux/security.h> #include <linux/pid_namespace.h> #include <linux/pid.h> +#include <linux/pidfs.h> #include <linux/nsproxy.h> #include <linux/slab.h> #include <linux/errqueue.h> @@ -210,6 +211,19 @@ int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *p) p->creds.gid = gid; break; } + case SCM_PIDFD: + { + unsigned int flags; + + if (cmsg->cmsg_len != CMSG_LEN(sizeof(flags))) + goto error; + memcpy(&flags, CMSG_DATA(cmsg), sizeof(flags)); + err = pidfd_validate_flags(flags); + if (err) + goto error; + p->pidfd_flags = flags; + break; + } default: goto error; } diff --git a/net/core/sock.c b/net/core/sock.c index 039be95c40cf..d1fce437c035 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -2930,6 +2930,7 @@ int __sock_cmsg_send(struct sock *sk, struct cmsghdr *cmsg, /* SCM_RIGHTS and SCM_CREDENTIALS are semantically in SOL_UNIX. */ case SCM_RIGHTS: case SCM_CREDENTIALS: + case SCM_PIDFD: break; default: return -EINVAL; diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 001ccc55ef0f..8b19dfec0221 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -1892,6 +1892,7 @@ static int unix_scm_to_skb(struct scm_cookie *scm, struct sk_buff *skb, bool sen UNIXCB(skb).uid = scm->creds.uid; UNIXCB(skb).gid = scm->creds.gid; UNIXCB(skb).fp = NULL; + UNIXCB(skb).pidfd_flags = scm->pidfd_flags; unix_get_secdata(scm, skb); if (scm->fp && send_fds) err = unix_attach_fds(scm, skb); @@ -2486,6 +2487,7 @@ int __unix_dgram_recvmsg(struct sock *sk, struct msghdr *msg, size_t size, memset(&scm, 0, sizeof(scm)); scm_set_cred(&scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid); + scm.pidfd_flags = UNIXCB(skb).pidfd_flags; unix_set_secdata(&scm, skb); if (!(flags & MSG_PEEK)) { @@ -2873,6 +2875,7 @@ static int unix_stream_read_generic(struct unix_stream_read_state *state, test_bit(SOCK_PASSPIDFD, &sock->flags)) { /* Copy credentials */ scm_set_cred(&scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid); + scm.pidfd_flags = UNIXCB(skb).pidfd_flags; unix_set_secdata(&scm, skb); check_creds = true; } diff --git a/tools/testing/selftests/net/af_unix/scm_pidfd.c b/tools/testing/selftests/net/af_unix/scm_pidfd.c index 7e534594167e..1e70ff253a1d 100644 --- a/tools/testing/selftests/net/af_unix/scm_pidfd.c +++ b/tools/testing/selftests/net/af_unix/scm_pidfd.c @@ -5,6 +5,7 @@ #include <stddef.h> #include <stdio.h> #include <stdlib.h> +#include <fcntl.h> #include <sys/socket.h> #include <linux/socket.h> #include <unistd.h> @@ -15,6 +16,11 @@ #include <sys/types.h> #include <sys/wait.h> +/* There are problems including linux/pidfd.h, so define. */ +#ifndef PIDFD_NONBLOCK +#define PIDFD_NONBLOCK O_NONBLOCK +#endif + #include "../../kselftest_harness.h" #define clean_errno() (errno == 0 ? "None" : strerror(errno)) @@ -126,7 +132,7 @@ static pid_t get_pid_from_fdinfo_file(int pidfd, const char *key, size_t keylen) return result; } -static int cmsg_check(int fd) +static int cmsg_check(int fd, unsigned int pidfd_flags) { struct msghdr msg = { 0 }; struct cmsghdr *cmsg; @@ -136,6 +142,7 @@ static int cmsg_check(int fd) char control[CMSG_SPACE(sizeof(struct ucred)) + CMSG_SPACE(sizeof(int))] = { 0 }; int *pidfd = NULL; + unsigned int flags; pid_t parent_pid; int err; @@ -197,6 +204,13 @@ static int cmsg_check(int fd) return 1; } + flags = fcntl(*pidfd, F_GETFL, 0); + flags &= ~O_ACCMODE; + if (flags != pidfd_flags) { + log_err("SCM_PIDFD flags mismatch: %x != %x", flags, pidfd_flags); + return 1; + } + /* pidfd from SCM_PIDFD should point to the parent process PID */ parent_pid = get_pid_from_fdinfo_file(*pidfd, "Pid:", sizeof("Pid:") - 1); @@ -227,30 +241,49 @@ FIXTURE_VARIANT(scm_pidfd) { int type; bool abstract; + unsigned int flags; }; FIXTURE_VARIANT_ADD(scm_pidfd, stream_pathname) { .type = SOCK_STREAM, .abstract = 0, + .flags = 0, }; FIXTURE_VARIANT_ADD(scm_pidfd, stream_abstract) { .type = SOCK_STREAM, .abstract = 1, + .flags = 0, }; FIXTURE_VARIANT_ADD(scm_pidfd, dgram_pathname) { .type = SOCK_DGRAM, .abstract = 0, + .flags = 0, }; FIXTURE_VARIANT_ADD(scm_pidfd, dgram_abstract) { .type = SOCK_DGRAM, .abstract = 1, + .flags = 0, +}; + +FIXTURE_VARIANT_ADD(scm_pidfd, stream_nonblock) +{ + .type = SOCK_STREAM, + .abstract = 0, + .flags = PIDFD_NONBLOCK, +}; + +FIXTURE_VARIANT_ADD(scm_pidfd, dgram_nonblock) +{ + .type = SOCK_DGRAM, + .abstract = 0, + .flags = PIDFD_NONBLOCK, }; FIXTURE_SETUP(scm_pidfd) @@ -335,7 +368,7 @@ static void client(FIXTURE_DATA(scm_pidfd) *self, close(self->startup_pipe[1]); - if (cmsg_check(cfd)) { + if (cmsg_check(cfd, variant->flags)) { log_err("cmsg_check failed"); child_die(); } @@ -375,6 +408,27 @@ TEST_F(scm_pidfd, test) int err; int pfd; int child_status = 0; + char iobuf; + unsigned int pidfd_flags; + struct msghdr msg = { 0 }; + struct cmsghdr *cmsg; + struct iovec io = { + .iov_base = &iobuf, + .iov_len = sizeof(iobuf) + }; + union { + char buf[CMSG_SPACE(sizeof(pidfd_flags))]; + struct cmsghdr align; + } u; + + msg.msg_iov = &io; + msg.msg_iovlen = 1; + msg.msg_control = u.buf; + msg.msg_controllen = sizeof(u.buf); + cmsg = CMSG_FIRSTHDR(&msg); + cmsg->cmsg_level = SOL_SOCKET; + cmsg->cmsg_type = SCM_PIDFD; + cmsg->cmsg_len = CMSG_LEN(sizeof(pidfd_flags)); self->server = socket(AF_UNIX, variant->type, 0); ASSERT_NE(-1, self->server); @@ -414,12 +468,16 @@ TEST_F(scm_pidfd, test) close(self->startup_pipe[0]); if (variant->type == SOCK_DGRAM) { - err = sendto(pfd, "x", sizeof(char), 0, (struct sockaddr *)&self->client_addr->listen_addr, self->client_addr->addrlen); - ASSERT_NE(-1, err); - } else { - err = send(pfd, "x", sizeof(char), 0); + err = connect(pfd, + (struct sockaddr *)&self->client_addr->listen_addr, + self->client_addr->addrlen); ASSERT_NE(-1, err); } + iobuf = 'x'; + pidfd_flags = variant->flags; + memcpy(CMSG_DATA(cmsg), &pidfd_flags, sizeof(pidfd_flags)); + err = sendmsg(pfd, &msg, 0); + ASSERT_NE(-1, err); close(pfd); waitpid(self->client_pid, &child_status, 0); -- 2.47.0

1 year

3
2
0 0

[PATCH bpf-next 00/10] selftests/bpf: migrate test_flow_dissector.sh to test_progs

by Alexis Lothoré (eBPF Foundation)

Hello, this new series aims to migrate test_flow_dissector.sh into test_progs. There are 2 "main" parts in test_flow_dissector.sh: - a set of tests checking flow_dissector programs attachment to either root namespace or non-root namespace - dissection test The first set is integrated in flow_dissector.c, which already contains some existing tests for flow_dissector programs. This series uses the opportunity to update a bit this file (use new assert, re-split tests, etc) The second part is migrated into a new file under test_progs, flow_dissector_classification.c. It uses the same eBPF programs as flow_dissector.c, but the difference is rather about how those program are executed: - flow_dissector.c manually runs programs with BPF_PROG_RUN - flow_dissector_classification.c sends real packets to be dissected, and so it also executes kernel code related to eBPF flow dissector (eg: __skb_flow_bpf_to_target) --- Alexis Lothoré (eBPF Foundation) (10): selftests/bpf: add a macro to compare raw memory selftests/bpf: use ASSERT_MEMEQ to compare bpf flow keys selftests/bpf: replace CHECK calls with ASSERT macros in flow_dissector test selftests/bpf: re-split main function into dedicated tests selftests/bpf: expose all subtests from flow_dissector selftests/bpf: add gre packets testing to flow_dissector selftests/bpf: migrate flow_dissector namespace exclusivity test selftests/bpf: Enable generic tc actions in selftests config selftests/bpf: migrate bpf flow dissectors tests to test_progs selftests/bpf: remove test_flow_dissector.sh tools/testing/selftests/bpf/.gitignore | 1 - tools/testing/selftests/bpf/Makefile | 3 +- tools/testing/selftests/bpf/config | 1 + .../selftests/bpf/prog_tests/flow_dissector.c | 307 ++++++-- .../bpf/prog_tests/flow_dissector_classification.c | 851 +++++++++++++++++++++ tools/testing/selftests/bpf/test_flow_dissector.c | 780 ------------------- tools/testing/selftests/bpf/test_flow_dissector.sh | 178 ----- tools/testing/selftests/bpf/test_progs.h | 25 + 8 files changed, 1107 insertions(+), 1039 deletions(-) --- base-commit: 16e1d1c377aa4c56223701a31f3bfa88505e7e4f change-id: 20241019-flow_dissector-3eb0c07fc163 Best regards, -- Alexis Lothoré, Bootlin Embedded Linux and Kernel engineering https://bootlin.com

1 year

3
24
0 0

[PATCH v2 1/2] kunit: tool: Only print the summary

by Rae Moar

From: David Gow <davidgow(a)google.com> Allow only printing the summary at the end of a test run, rather than all individual test results. This summary will list a few failing tests if there are any. To use: ./tools/testing/kunit/kunit.py run --summary Signed-off-by: Rae Moar <rmoar(a)google.com> Signed-off-by: David Gow <davidgow(a)google.com> --- Changes since v1: - kunit_printer init changed to include print variable to turn off printing tools/testing/kunit/kunit.py | 18 +++- tools/testing/kunit/kunit_parser.py | 109 +++++++++++++------------ tools/testing/kunit/kunit_printer.py | 14 +++- tools/testing/kunit/kunit_tool_test.py | 55 +++++++------ 4 files changed, 112 insertions(+), 84 deletions(-) diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py index bc74088c458a..27c55a7fc1a0 100755 --- a/tools/testing/kunit/kunit.py +++ b/tools/testing/kunit/kunit.py @@ -23,7 +23,7 @@ from typing import Iterable, List, Optional, Sequence, Tuple import kunit_json import kunit_kernel import kunit_parser -from kunit_printer import stdout +from kunit_printer import stdout, null_printer class KunitStatus(Enum): SUCCESS = auto() @@ -49,6 +49,7 @@ class KunitBuildRequest(KunitConfigRequest): class KunitParseRequest: raw_output: Optional[str] json: Optional[str] + summary: bool @dataclass class KunitExecRequest(KunitParseRequest): @@ -235,11 +236,16 @@ def parse_tests(request: KunitParseRequest, metadata: kunit_json.Metadata, input parse_time = time.time() - parse_start return KunitResult(KunitStatus.SUCCESS, parse_time), fake_test + default_printer = stdout + if request.summary: + default_printer = null_printer # Actually parse the test results. - test = kunit_parser.parse_run_tests(input_data) + test = kunit_parser.parse_run_tests(input_data, default_printer) parse_time = time.time() - parse_start + kunit_parser.print_summary_line(test, stdout) + if request.json: json_str = kunit_json.get_json_result( test=test, @@ -413,6 +419,10 @@ def add_parse_opts(parser: argparse.ArgumentParser) -> None: help='Prints parsed test results as JSON to stdout or a file if ' 'a filename is specified. Does nothing if --raw_output is set.', type=str, const='stdout', default=None, metavar='FILE') + parser.add_argument('--summary', + help='Prints only the summary line for parsed test results.' + 'Does nothing if --raw_output is set.', + action='store_true') def tree_from_args(cli_args: argparse.Namespace) -> kunit_kernel.LinuxSourceTree: @@ -448,6 +458,7 @@ def run_handler(cli_args: argparse.Namespace) -> None: jobs=cli_args.jobs, raw_output=cli_args.raw_output, json=cli_args.json, + summary=cli_args.summary, timeout=cli_args.timeout, filter_glob=cli_args.filter_glob, filter=cli_args.filter, @@ -495,6 +506,7 @@ def exec_handler(cli_args: argparse.Namespace) -> None: exec_request = KunitExecRequest(raw_output=cli_args.raw_output, build_dir=cli_args.build_dir, json=cli_args.json, + summary=cli_args.summary, timeout=cli_args.timeout, filter_glob=cli_args.filter_glob, filter=cli_args.filter, @@ -520,7 +532,7 @@ def parse_handler(cli_args: argparse.Namespace) -> None: # We know nothing about how the result was created! metadata = kunit_json.Metadata() request = KunitParseRequest(raw_output=cli_args.raw_output, - json=cli_args.json) + json=cli_args.json, summary=cli_args.summary) result, _ = parse_tests(request, metadata, kunit_output) if result.status != KunitStatus.SUCCESS: sys.exit(1) diff --git a/tools/testing/kunit/kunit_parser.py b/tools/testing/kunit/kunit_parser.py index ce34be15c929..732f448263de 100644 --- a/tools/testing/kunit/kunit_parser.py +++ b/tools/testing/kunit/kunit_parser.py @@ -17,7 +17,7 @@ import textwrap from enum import Enum, auto from typing import Iterable, Iterator, List, Optional, Tuple -from kunit_printer import stdout +from kunit_printer import Printer, stdout class Test: """ @@ -54,10 +54,10 @@ class Test: """Returns string representation of a Test class object.""" return str(self) - def add_error(self, error_message: str) -> None: + def add_error(self, printer: Printer, error_message: str) -> None: """Records an error that occurred while parsing this test.""" self.counts.errors += 1 - stdout.print_with_timestamp(stdout.red('[ERROR]') + f' Test: {self.name}: {error_message}') + printer.print_with_timestamp(stdout.red('[ERROR]') + f' Test: {self.name}: {error_message}') def ok_status(self) -> bool: """Returns true if the status was ok, i.e. passed or skipped.""" @@ -251,7 +251,7 @@ KTAP_VERSIONS = [1] TAP_VERSIONS = [13, 14] def check_version(version_num: int, accepted_versions: List[int], - version_type: str, test: Test) -> None: + version_type: str, test: Test, printer: Printer) -> None: """ Adds error to test object if version number is too high or too low. @@ -263,13 +263,14 @@ def check_version(version_num: int, accepted_versions: List[int], version_type - 'KTAP' or 'TAP' depending on the type of version line. test - Test object for current test being parsed + printer - Printer object to output error """ if version_num < min(accepted_versions): - test.add_error(f'{version_type} version lower than expected!') + test.add_error(printer, f'{version_type} version lower than expected!') elif version_num > max(accepted_versions): - test.add_error(f'{version_type} version higer than expected!') + test.add_error(printer, f'{version_type} version higer than expected!') -def parse_ktap_header(lines: LineStream, test: Test) -> bool: +def parse_ktap_header(lines: LineStream, test: Test, printer: Printer) -> bool: """ Parses KTAP/TAP header line and checks version number. Returns False if fails to parse KTAP/TAP header line. @@ -281,6 +282,7 @@ def parse_ktap_header(lines: LineStream, test: Test) -> bool: Parameters: lines - LineStream of KTAP output to parse test - Test object for current test being parsed + printer - Printer object to output results Return: True if successfully parsed KTAP/TAP header line @@ -289,10 +291,10 @@ def parse_ktap_header(lines: LineStream, test: Test) -> bool: tap_match = TAP_START.match(lines.peek()) if ktap_match: version_num = int(ktap_match.group(1)) - check_version(version_num, KTAP_VERSIONS, 'KTAP', test) + check_version(version_num, KTAP_VERSIONS, 'KTAP', test, printer) elif tap_match: version_num = int(tap_match.group(1)) - check_version(version_num, TAP_VERSIONS, 'TAP', test) + check_version(version_num, TAP_VERSIONS, 'TAP', test, printer) else: return False lines.pop() @@ -380,7 +382,7 @@ def peek_test_name_match(lines: LineStream, test: Test) -> bool: return name == test.name def parse_test_result(lines: LineStream, test: Test, - expected_num: int) -> bool: + expected_num: int, printer: Printer) -> bool: """ Parses test result line and stores the status and name in the test object. Reports an error if the test number does not match expected @@ -398,6 +400,7 @@ def parse_test_result(lines: LineStream, test: Test, lines - LineStream of KTAP output to parse test - Test object for current test being parsed expected_num - expected test number for current test + printer - Printer object to output results Return: True if successfully parsed a test result line. @@ -420,7 +423,7 @@ def parse_test_result(lines: LineStream, test: Test, # Check test num num = int(match.group(2)) if num != expected_num: - test.add_error(f'Expected test number {expected_num} but found {num}') + test.add_error(printer, f'Expected test number {expected_num} but found {num}') # Set status of test object status = match.group(1) @@ -486,7 +489,7 @@ def format_test_divider(message: str, len_message: int) -> str: len_2 = difference - len_1 return ('=' * len_1) + f' {message} ' + ('=' * len_2) -def print_test_header(test: Test) -> None: +def print_test_header(test: Test, printer: Printer) -> None: """ Prints test header with test name and optionally the expected number of subtests. @@ -496,6 +499,7 @@ def print_test_header(test: Test) -> None: Parameters: test - Test object representing current test being printed + printer - Printer object to output results """ message = test.name if message != "": @@ -507,15 +511,15 @@ def print_test_header(test: Test) -> None: message += '(1 subtest)' else: message += f'({test.expected_count} subtests)' - stdout.print_with_timestamp(format_test_divider(message, len(message))) + printer.print_with_timestamp(format_test_divider(message, len(message))) -def print_log(log: Iterable[str]) -> None: +def print_log(log: Iterable[str], printer: Printer) -> None: """Prints all strings in saved log for test in yellow.""" formatted = textwrap.dedent('\n'.join(log)) for line in formatted.splitlines(): - stdout.print_with_timestamp(stdout.yellow(line)) + printer.print_with_timestamp(printer.yellow(line)) -def format_test_result(test: Test) -> str: +def format_test_result(test: Test, printer: Printer) -> str: """ Returns string with formatted test result with colored status and test name. @@ -525,23 +529,24 @@ def format_test_result(test: Test) -> str: Parameters: test - Test object representing current test being printed + printer - Printer object to output results Return: String containing formatted test result """ if test.status == TestStatus.SUCCESS: - return stdout.green('[PASSED] ') + test.name + return printer.green('[PASSED] ') + test.name if test.status == TestStatus.SKIPPED: - return stdout.yellow('[SKIPPED] ') + test.name + return printer.yellow('[SKIPPED] ') + test.name if test.status == TestStatus.NO_TESTS: - return stdout.yellow('[NO TESTS RUN] ') + test.name + return printer.yellow('[NO TESTS RUN] ') + test.name if test.status == TestStatus.TEST_CRASHED: - print_log(test.log) + print_log(test.log, printer) return stdout.red('[CRASHED] ') + test.name - print_log(test.log) - return stdout.red('[FAILED] ') + test.name + print_log(test.log, printer) + return printer.red('[FAILED] ') + test.name -def print_test_result(test: Test) -> None: +def print_test_result(test: Test, printer: Printer) -> None: """ Prints result line with status of test. @@ -550,10 +555,11 @@ def print_test_result(test: Test) -> None: Parameters: test - Test object representing current test being printed + printer - Printer object """ - stdout.print_with_timestamp(format_test_result(test)) + printer.print_with_timestamp(format_test_result(test, printer)) -def print_test_footer(test: Test) -> None: +def print_test_footer(test: Test, printer: Printer) -> None: """ Prints test footer with status of test. @@ -562,10 +568,11 @@ def print_test_footer(test: Test) -> None: Parameters: test - Test object representing current test being printed + printer - Printer object to output results """ - message = format_test_result(test) - stdout.print_with_timestamp(format_test_divider(message, - len(message) - stdout.color_len())) + message = format_test_result(test, printer) + printer.print_with_timestamp(format_test_divider(message, + len(message) - printer.color_len())) @@ -601,7 +608,7 @@ def _summarize_failed_tests(test: Test) -> str: return 'Failures: ' + ', '.join(failures) -def print_summary_line(test: Test) -> None: +def print_summary_line(test: Test, printer: Printer) -> None: """ Prints summary line of test object. Color of line is dependent on status of test. Color is green if test passes, yellow if test is @@ -614,6 +621,7 @@ def print_summary_line(test: Test) -> None: Errors: 0" test - Test object representing current test being printed + printer - Printer object to output results """ if test.status == TestStatus.SUCCESS: color = stdout.green @@ -621,7 +629,7 @@ def print_summary_line(test: Test) -> None: color = stdout.yellow else: color = stdout.red - stdout.print_with_timestamp(color(f'Testing complete. {test.counts}')) + printer.print_with_timestamp(color(f'Testing complete. {test.counts}')) # Summarize failures that might have gone off-screen since we had a lot # of tests (arbitrarily defined as >=100 for now). @@ -630,7 +638,7 @@ def print_summary_line(test: Test) -> None: summarized = _summarize_failed_tests(test) if not summarized: return - stdout.print_with_timestamp(color(summarized)) + printer.print_with_timestamp(color(summarized)) # Other methods: @@ -654,7 +662,7 @@ def bubble_up_test_results(test: Test) -> None: elif test.counts.get_status() == TestStatus.TEST_CRASHED: test.status = TestStatus.TEST_CRASHED -def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: bool) -> Test: +def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: bool, printer: Printer) -> Test: """ Finds next test to parse in LineStream, creates new Test object, parses any subtests of the test, populates Test object with all @@ -710,6 +718,7 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: log - list of strings containing any preceding diagnostic lines corresponding to the current test is_subtest - boolean indicating whether test is a subtest + printer - Printer object to output results Return: Test object populated with characteristics and any subtests @@ -725,14 +734,14 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: # If parsing the main/top-level test, parse KTAP version line and # test plan test.name = "main" - ktap_line = parse_ktap_header(lines, test) + ktap_line = parse_ktap_header(lines, test, printer) test.log.extend(parse_diagnostic(lines)) parse_test_plan(lines, test) parent_test = True else: # If not the main test, attempt to parse a test header containing # the KTAP version line and/or subtest header line - ktap_line = parse_ktap_header(lines, test) + ktap_line = parse_ktap_header(lines, test, printer) subtest_line = parse_test_header(lines, test) parent_test = (ktap_line or subtest_line) if parent_test: @@ -740,7 +749,7 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: # to parse test plan and print test header test.log.extend(parse_diagnostic(lines)) parse_test_plan(lines, test) - print_test_header(test) + print_test_header(test, printer) expected_count = test.expected_count subtests = [] test_num = 1 @@ -758,16 +767,16 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: # If parser reaches end of test before # parsing expected number of subtests, print # crashed subtest and record error - test.add_error('missing expected subtest!') + test.add_error(printer, 'missing expected subtest!') sub_test.log.extend(sub_log) test.counts.add_status( TestStatus.TEST_CRASHED) - print_test_result(sub_test) + print_test_result(sub_test, printer) else: test.log.extend(sub_log) break else: - sub_test = parse_test(lines, test_num, sub_log, True) + sub_test = parse_test(lines, test_num, sub_log, True, printer) subtests.append(sub_test) test_num += 1 test.subtests = subtests @@ -775,51 +784,51 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: # If not main test, look for test result line test.log.extend(parse_diagnostic(lines)) if test.name != "" and not peek_test_name_match(lines, test): - test.add_error('missing subtest result line!') + test.add_error(printer, 'missing subtest result line!') else: - parse_test_result(lines, test, expected_num) + parse_test_result(lines, test, expected_num, printer) # Check for there being no subtests within parent test if parent_test and len(subtests) == 0: # Don't override a bad status if this test had one reported. # Assumption: no subtests means CRASHED is from Test.__init__() if test.status in (TestStatus.TEST_CRASHED, TestStatus.SUCCESS): - print_log(test.log) + print_log(test.log, printer) test.status = TestStatus.NO_TESTS - test.add_error('0 tests run!') + test.add_error(printer, '0 tests run!') # Add statuses to TestCounts attribute in Test object bubble_up_test_results(test) if parent_test and is_subtest: # If test has subtests and is not the main test object, print # footer. - print_test_footer(test) + print_test_footer(test, printer) elif is_subtest: - print_test_result(test) + print_test_result(test, printer) return test -def parse_run_tests(kernel_output: Iterable[str]) -> Test: +def parse_run_tests(kernel_output: Iterable[str], printer: Printer) -> Test: """ Using kernel output, extract KTAP lines, parse the lines for test results and print condensed test results and summary line. Parameters: kernel_output - Iterable object contains lines of kernel output + printer - Printer object to output results Return: Test - the main test object with all subtests. """ - stdout.print_with_timestamp(DIVIDER) + printer.print_with_timestamp(DIVIDER) lines = extract_tap_lines(kernel_output) test = Test() if not lines: test.name = '<missing>' - test.add_error('Could not find any KTAP output. Did any KUnit tests run?') + test.add_error(printer, 'Could not find any KTAP output. Did any KUnit tests run?') test.status = TestStatus.FAILURE_TO_PARSE_TESTS else: - test = parse_test(lines, 0, [], False) + test = parse_test(lines, 0, [], False, printer) if test.status != TestStatus.NO_TESTS: test.status = test.counts.get_status() - stdout.print_with_timestamp(DIVIDER) - print_summary_line(test) + printer.print_with_timestamp(DIVIDER) return test diff --git a/tools/testing/kunit/kunit_printer.py b/tools/testing/kunit/kunit_printer.py index 015adf87dc2c..ca119f61fe79 100644 --- a/tools/testing/kunit/kunit_printer.py +++ b/tools/testing/kunit/kunit_printer.py @@ -15,12 +15,17 @@ _RESET = '\033[0;0m' class Printer: """Wraps a file object, providing utilities for coloring output, etc.""" - def __init__(self, output: typing.IO[str]): + def __init__(self, print: bool=True, output: typing.IO[str]=sys.stdout): self._output = output - self._use_color = output.isatty() + self._print = print + if print: + self._use_color = output.isatty() + else: + self._use_color = False def print(self, message: str) -> None: - print(message, file=self._output) + if self._print: + print(message, file=self._output) def print_with_timestamp(self, message: str) -> None: ts = datetime.datetime.now().strftime('%H:%M:%S') @@ -45,4 +50,5 @@ class Printer: return len(self.red('')) # Provides a default instance that prints to stdout -stdout = Printer(sys.stdout) +stdout = Printer() +null_printer = Printer(print=False) diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py index 2beb7327e53f..02aa296d8850 100755 --- a/tools/testing/kunit/kunit_tool_test.py +++ b/tools/testing/kunit/kunit_tool_test.py @@ -23,6 +23,7 @@ import kunit_parser import kunit_kernel import kunit_json import kunit +from kunit_printer import stdout test_tmpdir = '' abs_test_data_dir = '' @@ -139,28 +140,28 @@ class KUnitParserTest(unittest.TestCase): def test_parse_successful_test_log(self): all_passed_log = test_data_path('test_is_test_passed-all_passed.log') with open(all_passed_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual(result.counts.errors, 0) def test_parse_successful_nested_tests_log(self): all_passed_log = test_data_path('test_is_test_passed-all_passed_nested.log') with open(all_passed_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual(result.counts.errors, 0) def test_kselftest_nested(self): kselftest_log = test_data_path('test_is_test_passed-kselftest.log') with open(kselftest_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual(result.counts.errors, 0) def test_parse_failed_test_log(self): failed_log = test_data_path('test_is_test_passed-failure.log') with open(failed_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.FAILURE, result.status) self.assertEqual(result.counts.errors, 0) @@ -168,7 +169,7 @@ class KUnitParserTest(unittest.TestCase): empty_log = test_data_path('test_is_test_passed-no_tests_run_no_header.log') with open(empty_log) as file: result = kunit_parser.parse_run_tests( - kunit_parser.extract_tap_lines(file.readlines())) + kunit_parser.extract_tap_lines(file.readlines()), stdout) self.assertEqual(0, len(result.subtests)) self.assertEqual(kunit_parser.TestStatus.FAILURE_TO_PARSE_TESTS, result.status) self.assertEqual(result.counts.errors, 1) @@ -179,7 +180,7 @@ class KUnitParserTest(unittest.TestCase): with open(missing_plan_log) as file: result = kunit_parser.parse_run_tests( kunit_parser.extract_tap_lines( - file.readlines())) + file.readlines()), stdout) # A missing test plan is not an error. self.assertEqual(result.counts, kunit_parser.TestCounts(passed=10, errors=0)) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) @@ -188,7 +189,7 @@ class KUnitParserTest(unittest.TestCase): header_log = test_data_path('test_is_test_passed-no_tests_run_with_header.log') with open(header_log) as file: result = kunit_parser.parse_run_tests( - kunit_parser.extract_tap_lines(file.readlines())) + kunit_parser.extract_tap_lines(file.readlines()), stdout) self.assertEqual(0, len(result.subtests)) self.assertEqual(kunit_parser.TestStatus.NO_TESTS, result.status) self.assertEqual(result.counts.errors, 1) @@ -197,7 +198,7 @@ class KUnitParserTest(unittest.TestCase): no_plan_log = test_data_path('test_is_test_passed-no_tests_no_plan.log') with open(no_plan_log) as file: result = kunit_parser.parse_run_tests( - kunit_parser.extract_tap_lines(file.readlines())) + kunit_parser.extract_tap_lines(file.readlines()), stdout) self.assertEqual(0, len(result.subtests[0].subtests[0].subtests)) self.assertEqual( kunit_parser.TestStatus.NO_TESTS, @@ -210,7 +211,7 @@ class KUnitParserTest(unittest.TestCase): print_mock = mock.patch('kunit_printer.Printer.print').start() with open(crash_log) as file: result = kunit_parser.parse_run_tests( - kunit_parser.extract_tap_lines(file.readlines())) + kunit_parser.extract_tap_lines(file.readlines()), stdout) print_mock.assert_any_call(StrContains('Could not find any KTAP output.')) print_mock.stop() self.assertEqual(0, len(result.subtests)) @@ -219,7 +220,7 @@ class KUnitParserTest(unittest.TestCase): def test_skipped_test(self): skipped_log = test_data_path('test_skip_tests.log') with open(skipped_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) # A skipped test does not fail the whole suite. self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) @@ -228,7 +229,7 @@ class KUnitParserTest(unittest.TestCase): def test_skipped_all_tests(self): skipped_log = test_data_path('test_skip_all_tests.log') with open(skipped_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SKIPPED, result.status) self.assertEqual(result.counts, kunit_parser.TestCounts(skipped=5)) @@ -236,7 +237,7 @@ class KUnitParserTest(unittest.TestCase): def test_ignores_hyphen(self): hyphen_log = test_data_path('test_strip_hyphen.log') with open(hyphen_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) # A skipped test does not fail the whole suite. self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) @@ -250,7 +251,7 @@ class KUnitParserTest(unittest.TestCase): def test_ignores_prefix_printk_time(self): prefix_log = test_data_path('test_config_printk_time.log') with open(prefix_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual('kunit-resource-test', result.subtests[0].name) self.assertEqual(result.counts.errors, 0) @@ -258,7 +259,7 @@ class KUnitParserTest(unittest.TestCase): def test_ignores_multiple_prefixes(self): prefix_log = test_data_path('test_multiple_prefixes.log') with open(prefix_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual('kunit-resource-test', result.subtests[0].name) self.assertEqual(result.counts.errors, 0) @@ -266,7 +267,7 @@ class KUnitParserTest(unittest.TestCase): def test_prefix_mixed_kernel_output(self): mixed_prefix_log = test_data_path('test_interrupted_tap_output.log') with open(mixed_prefix_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual('kunit-resource-test', result.subtests[0].name) self.assertEqual(result.counts.errors, 0) @@ -274,7 +275,7 @@ class KUnitParserTest(unittest.TestCase): def test_prefix_poundsign(self): pound_log = test_data_path('test_pound_sign.log') with open(pound_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual('kunit-resource-test', result.subtests[0].name) self.assertEqual(result.counts.errors, 0) @@ -282,7 +283,7 @@ class KUnitParserTest(unittest.TestCase): def test_kernel_panic_end(self): panic_log = test_data_path('test_kernel_panic_interrupt.log') with open(panic_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.TEST_CRASHED, result.status) self.assertEqual('kunit-resource-test', result.subtests[0].name) self.assertGreaterEqual(result.counts.errors, 1) @@ -290,7 +291,7 @@ class KUnitParserTest(unittest.TestCase): def test_pound_no_prefix(self): pound_log = test_data_path('test_pound_no_prefix.log') with open(pound_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual('kunit-resource-test', result.subtests[0].name) self.assertEqual(result.counts.errors, 0) @@ -310,7 +311,7 @@ class KUnitParserTest(unittest.TestCase): not ok 2 - test2 not ok 1 - some_failed_suite """ - result = kunit_parser.parse_run_tests(output.splitlines()) + result = kunit_parser.parse_run_tests(output.splitlines(), stdout) self.assertEqual(kunit_parser.TestStatus.FAILURE, result.status) self.assertEqual(kunit_parser._summarize_failed_tests(result), @@ -319,7 +320,7 @@ class KUnitParserTest(unittest.TestCase): def test_ktap_format(self): ktap_log = test_data_path('test_parse_ktap_output.log') with open(ktap_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(result.counts, kunit_parser.TestCounts(passed=3)) self.assertEqual('suite', result.subtests[0].name) self.assertEqual('case_1', result.subtests[0].subtests[0].name) @@ -328,13 +329,13 @@ class KUnitParserTest(unittest.TestCase): def test_parse_subtest_header(self): ktap_log = test_data_path('test_parse_subtest_header.log') with open(ktap_log) as file: - kunit_parser.parse_run_tests(file.readlines()) + kunit_parser.parse_run_tests(file.readlines(), stdout) self.print_mock.assert_any_call(StrContains('suite (1 subtest)')) def test_parse_attributes(self): ktap_log = test_data_path('test_parse_attributes.log') with open(ktap_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) # Test should pass with no errors self.assertEqual(result.counts, kunit_parser.TestCounts(passed=1, errors=0)) @@ -355,7 +356,7 @@ class KUnitParserTest(unittest.TestCase): Indented more. not ok 1 test1 """ - result = kunit_parser.parse_run_tests(output.splitlines()) + result = kunit_parser.parse_run_tests(output.splitlines(), stdout) self.assertEqual(kunit_parser.TestStatus.FAILURE, result.status) self.print_mock.assert_any_call(StrContains('Test output.')) @@ -544,7 +545,7 @@ class KUnitJsonTest(unittest.TestCase): def _json_for(self, log_file): with open(test_data_path(log_file)) as file: - test_result = kunit_parser.parse_run_tests(file) + test_result = kunit_parser.parse_run_tests(file, stdout) json_obj = kunit_json.get_json_result( test=test_result, metadata=kunit_json.Metadata()) @@ -810,7 +811,7 @@ class KUnitMainTest(unittest.TestCase): self.linux_source_mock.run_kernel.return_value = ['TAP version 14', 'init: random output'] + want got = kunit._list_tests(self.linux_source_mock, - kunit.KunitExecRequest(None, None, '.kunit', 300, 'suite*', '', None, None, 'suite', False, False)) + kunit.KunitExecRequest(None, None, False, '.kunit', 300, 'suite*', '', None, None, 'suite', False, False)) self.assertEqual(got, want) # Should respect the user's filter glob when listing tests. self.linux_source_mock.run_kernel.assert_called_once_with( @@ -823,7 +824,7 @@ class KUnitMainTest(unittest.TestCase): # Should respect the user's filter glob when listing tests. mock_tests.assert_called_once_with(mock.ANY, - kunit.KunitExecRequest(None, None, '.kunit', 300, 'suite*.test*', '', None, None, 'suite', False, False)) + kunit.KunitExecRequest(None, None, False, '.kunit', 300, 'suite*.test*', '', None, None, 'suite', False, False)) self.linux_source_mock.run_kernel.assert_has_calls([ mock.call(args=None, build_dir='.kunit', filter_glob='suite.test*', filter='', filter_action=None, timeout=300), mock.call(args=None, build_dir='.kunit', filter_glob='suite2.test*', filter='', filter_action=None, timeout=300), @@ -836,7 +837,7 @@ class KUnitMainTest(unittest.TestCase): # Should respect the user's filter glob when listing tests. mock_tests.assert_called_once_with(mock.ANY, - kunit.KunitExecRequest(None, None, '.kunit', 300, 'suite*', '', None, None, 'test', False, False)) + kunit.KunitExecRequest(None, None, False, '.kunit', 300, 'suite*', '', None, None, 'test', False, False)) self.linux_source_mock.run_kernel.assert_has_calls([ mock.call(args=None, build_dir='.kunit', filter_glob='suite.test1', filter='', filter_action=None, timeout=300), mock.call(args=None, build_dir='.kunit', filter_glob='suite.test2', filter='', filter_action=None, timeout=300), base-commit: ff6d85216d9f632f62ad8130d3c4a4b267e45048 -- 2.47.0.277.g8800431eea-goog

1 year

2
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0 0

Re: [PATCH 2/3] KVM: x86: Add support for VMware guest specific hypercalls

by Sean Christopherson

On Wed, Nov 13, 2024, Paolo Bonzini wrote: > Il mar 12 nov 2024, 21:44 Doug Covelli <doug.covelli(a)broadcom.com> ha > scritto: > > > > Split irqchip should be the best tradeoff. Without it, moves from cr8 > > > stay in the kernel, but moves to cr8 always go to userspace with a > > > KVM_EXIT_SET_TPR exit. You also won't be able to use Intel > > > flexpriority (in-processor accelerated TPR) because KVM does not know > > > which bits are set in IRR. So it will be *really* every move to cr8 > > > that goes to userspace. > > > > Sorry to hijack this thread but is there a technical reason not to allow > > CR8 based accesses to the TPR (not MMIO accesses) when the in-kernel local > > APIC is not in use? > > No worries, you're not hijacking :) The only reason is that it would be > more code for a seldom used feature and anyway with worse performance. (To > be clear, CR8 based accesses are allowed, but stores cause an exit in order > to check the new TPR against IRR. That's because KVM's API does not have an > equivalent of the TPR threshold as you point out below). > > > Also I could not find these documented anywhere but with MSFT's APIC our > > monitor relies on extensions for trapping certain events such as INIT/SIPI > > plus LINT0 and SVR writes: > > > > UINT64 X64ApicInitSipiExitTrap : 1; // > > WHvRunVpExitReasonX64ApicInitSipiTrap > > UINT64 X64ApicWriteLint0ExitTrap : 1; // > > WHvRunVpExitReasonX64ApicWriteTrap > > UINT64 X64ApicWriteLint1ExitTrap : 1; // > > WHvRunVpExitReasonX64ApicWriteTrap > > UINT64 X64ApicWriteSvrExitTrap : 1; // > > WHvRunVpExitReasonX64ApicWriteTrap > > > > There's no need for this in KVM's in-kernel APIC model. INIT and SIPI are > handled in the hypervisor and you can get the current state of APs via > KVM_GET_MPSTATE. LINT0 and LINT1 are injected with KVM_INTERRUPT and > KVM_NMI respectively, and they obey IF/PPR and NMI blocking respectively, > plus the interrupt shadow; so there's no need for userspace to know when > LINT0/LINT1 themselves change. The spurious interrupt vector register is > also handled completely in kernel. > > > I did not see any similar functionality for KVM. Does anything like that > > exist? In any case we would be happy to add support for handling CR8 > > accesses w/o exiting w/o the in-kernel APIC along with some sort of a way > > to configure the TPR threshold if folks are not opposed to that. > > As far I know everybody who's using KVM (whether proprietary or open > source) has had no need for that, so I don't think it's a good idea to make > the API more complex. +1 > Performance of Windows guests is going to be bad anyway with userspace APIC. Heh, on modern hardware, performance of any guest is going to suck with a userspace APIC, compared to what is possible with an in-kernel APIC. More importantly, I really, really don't want to encourage non-trivial usage of a local APIC in userspace. KVM's support for a userspace local APIC is very poorly tested these days. I have zero desire to spend any amount of time reviewing and fixing issues that are unique to emulating the local APIC in userspace. And long term, I would love to force an in-kernel local APIC, though I don't know if that's entirely feasible.

1 year

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[PATCH net-next v3 7/7] 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

1 year

2
2
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[PATCH 1/2] kunit: tool: Only print the summary

by Rae Moar

From: David Gow <davidgow(a)google.com> Allow only printing the summary at the end of a test run, rather than all individual test results. This summary will list a few failing tests if there are any. To use: ./tools/testing/kunit/kunit.py run --summary Signed-off-by: Rae Moar <rmoar(a)google.com> Signed-off-by: David Gow <davidgow(a)google.com> --- tools/testing/kunit/kunit.py | 18 +++- tools/testing/kunit/kunit_parser.py | 109 +++++++++++++------------ tools/testing/kunit/kunit_printer.py | 7 +- tools/testing/kunit/kunit_tool_test.py | 55 +++++++------ 4 files changed, 107 insertions(+), 82 deletions(-) diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py index bc74088c458a..27c55a7fc1a0 100755 --- a/tools/testing/kunit/kunit.py +++ b/tools/testing/kunit/kunit.py @@ -23,7 +23,7 @@ from typing import Iterable, List, Optional, Sequence, Tuple import kunit_json import kunit_kernel import kunit_parser -from kunit_printer import stdout +from kunit_printer import stdout, null_printer class KunitStatus(Enum): SUCCESS = auto() @@ -49,6 +49,7 @@ class KunitBuildRequest(KunitConfigRequest): class KunitParseRequest: raw_output: Optional[str] json: Optional[str] + summary: bool @dataclass class KunitExecRequest(KunitParseRequest): @@ -235,11 +236,16 @@ def parse_tests(request: KunitParseRequest, metadata: kunit_json.Metadata, input parse_time = time.time() - parse_start return KunitResult(KunitStatus.SUCCESS, parse_time), fake_test + default_printer = stdout + if request.summary: + default_printer = null_printer # Actually parse the test results. - test = kunit_parser.parse_run_tests(input_data) + test = kunit_parser.parse_run_tests(input_data, default_printer) parse_time = time.time() - parse_start + kunit_parser.print_summary_line(test, stdout) + if request.json: json_str = kunit_json.get_json_result( test=test, @@ -413,6 +419,10 @@ def add_parse_opts(parser: argparse.ArgumentParser) -> None: help='Prints parsed test results as JSON to stdout or a file if ' 'a filename is specified. Does nothing if --raw_output is set.', type=str, const='stdout', default=None, metavar='FILE') + parser.add_argument('--summary', + help='Prints only the summary line for parsed test results.' + 'Does nothing if --raw_output is set.', + action='store_true') def tree_from_args(cli_args: argparse.Namespace) -> kunit_kernel.LinuxSourceTree: @@ -448,6 +458,7 @@ def run_handler(cli_args: argparse.Namespace) -> None: jobs=cli_args.jobs, raw_output=cli_args.raw_output, json=cli_args.json, + summary=cli_args.summary, timeout=cli_args.timeout, filter_glob=cli_args.filter_glob, filter=cli_args.filter, @@ -495,6 +506,7 @@ def exec_handler(cli_args: argparse.Namespace) -> None: exec_request = KunitExecRequest(raw_output=cli_args.raw_output, build_dir=cli_args.build_dir, json=cli_args.json, + summary=cli_args.summary, timeout=cli_args.timeout, filter_glob=cli_args.filter_glob, filter=cli_args.filter, @@ -520,7 +532,7 @@ def parse_handler(cli_args: argparse.Namespace) -> None: # We know nothing about how the result was created! metadata = kunit_json.Metadata() request = KunitParseRequest(raw_output=cli_args.raw_output, - json=cli_args.json) + json=cli_args.json, summary=cli_args.summary) result, _ = parse_tests(request, metadata, kunit_output) if result.status != KunitStatus.SUCCESS: sys.exit(1) diff --git a/tools/testing/kunit/kunit_parser.py b/tools/testing/kunit/kunit_parser.py index ce34be15c929..732f448263de 100644 --- a/tools/testing/kunit/kunit_parser.py +++ b/tools/testing/kunit/kunit_parser.py @@ -17,7 +17,7 @@ import textwrap from enum import Enum, auto from typing import Iterable, Iterator, List, Optional, Tuple -from kunit_printer import stdout +from kunit_printer import Printer, stdout class Test: """ @@ -54,10 +54,10 @@ class Test: """Returns string representation of a Test class object.""" return str(self) - def add_error(self, error_message: str) -> None: + def add_error(self, printer: Printer, error_message: str) -> None: """Records an error that occurred while parsing this test.""" self.counts.errors += 1 - stdout.print_with_timestamp(stdout.red('[ERROR]') + f' Test: {self.name}: {error_message}') + printer.print_with_timestamp(stdout.red('[ERROR]') + f' Test: {self.name}: {error_message}') def ok_status(self) -> bool: """Returns true if the status was ok, i.e. passed or skipped.""" @@ -251,7 +251,7 @@ KTAP_VERSIONS = [1] TAP_VERSIONS = [13, 14] def check_version(version_num: int, accepted_versions: List[int], - version_type: str, test: Test) -> None: + version_type: str, test: Test, printer: Printer) -> None: """ Adds error to test object if version number is too high or too low. @@ -263,13 +263,14 @@ def check_version(version_num: int, accepted_versions: List[int], version_type - 'KTAP' or 'TAP' depending on the type of version line. test - Test object for current test being parsed + printer - Printer object to output error """ if version_num < min(accepted_versions): - test.add_error(f'{version_type} version lower than expected!') + test.add_error(printer, f'{version_type} version lower than expected!') elif version_num > max(accepted_versions): - test.add_error(f'{version_type} version higer than expected!') + test.add_error(printer, f'{version_type} version higer than expected!') -def parse_ktap_header(lines: LineStream, test: Test) -> bool: +def parse_ktap_header(lines: LineStream, test: Test, printer: Printer) -> bool: """ Parses KTAP/TAP header line and checks version number. Returns False if fails to parse KTAP/TAP header line. @@ -281,6 +282,7 @@ def parse_ktap_header(lines: LineStream, test: Test) -> bool: Parameters: lines - LineStream of KTAP output to parse test - Test object for current test being parsed + printer - Printer object to output results Return: True if successfully parsed KTAP/TAP header line @@ -289,10 +291,10 @@ def parse_ktap_header(lines: LineStream, test: Test) -> bool: tap_match = TAP_START.match(lines.peek()) if ktap_match: version_num = int(ktap_match.group(1)) - check_version(version_num, KTAP_VERSIONS, 'KTAP', test) + check_version(version_num, KTAP_VERSIONS, 'KTAP', test, printer) elif tap_match: version_num = int(tap_match.group(1)) - check_version(version_num, TAP_VERSIONS, 'TAP', test) + check_version(version_num, TAP_VERSIONS, 'TAP', test, printer) else: return False lines.pop() @@ -380,7 +382,7 @@ def peek_test_name_match(lines: LineStream, test: Test) -> bool: return name == test.name def parse_test_result(lines: LineStream, test: Test, - expected_num: int) -> bool: + expected_num: int, printer: Printer) -> bool: """ Parses test result line and stores the status and name in the test object. Reports an error if the test number does not match expected @@ -398,6 +400,7 @@ def parse_test_result(lines: LineStream, test: Test, lines - LineStream of KTAP output to parse test - Test object for current test being parsed expected_num - expected test number for current test + printer - Printer object to output results Return: True if successfully parsed a test result line. @@ -420,7 +423,7 @@ def parse_test_result(lines: LineStream, test: Test, # Check test num num = int(match.group(2)) if num != expected_num: - test.add_error(f'Expected test number {expected_num} but found {num}') + test.add_error(printer, f'Expected test number {expected_num} but found {num}') # Set status of test object status = match.group(1) @@ -486,7 +489,7 @@ def format_test_divider(message: str, len_message: int) -> str: len_2 = difference - len_1 return ('=' * len_1) + f' {message} ' + ('=' * len_2) -def print_test_header(test: Test) -> None: +def print_test_header(test: Test, printer: Printer) -> None: """ Prints test header with test name and optionally the expected number of subtests. @@ -496,6 +499,7 @@ def print_test_header(test: Test) -> None: Parameters: test - Test object representing current test being printed + printer - Printer object to output results """ message = test.name if message != "": @@ -507,15 +511,15 @@ def print_test_header(test: Test) -> None: message += '(1 subtest)' else: message += f'({test.expected_count} subtests)' - stdout.print_with_timestamp(format_test_divider(message, len(message))) + printer.print_with_timestamp(format_test_divider(message, len(message))) -def print_log(log: Iterable[str]) -> None: +def print_log(log: Iterable[str], printer: Printer) -> None: """Prints all strings in saved log for test in yellow.""" formatted = textwrap.dedent('\n'.join(log)) for line in formatted.splitlines(): - stdout.print_with_timestamp(stdout.yellow(line)) + printer.print_with_timestamp(printer.yellow(line)) -def format_test_result(test: Test) -> str: +def format_test_result(test: Test, printer: Printer) -> str: """ Returns string with formatted test result with colored status and test name. @@ -525,23 +529,24 @@ def format_test_result(test: Test) -> str: Parameters: test - Test object representing current test being printed + printer - Printer object to output results Return: String containing formatted test result """ if test.status == TestStatus.SUCCESS: - return stdout.green('[PASSED] ') + test.name + return printer.green('[PASSED] ') + test.name if test.status == TestStatus.SKIPPED: - return stdout.yellow('[SKIPPED] ') + test.name + return printer.yellow('[SKIPPED] ') + test.name if test.status == TestStatus.NO_TESTS: - return stdout.yellow('[NO TESTS RUN] ') + test.name + return printer.yellow('[NO TESTS RUN] ') + test.name if test.status == TestStatus.TEST_CRASHED: - print_log(test.log) + print_log(test.log, printer) return stdout.red('[CRASHED] ') + test.name - print_log(test.log) - return stdout.red('[FAILED] ') + test.name + print_log(test.log, printer) + return printer.red('[FAILED] ') + test.name -def print_test_result(test: Test) -> None: +def print_test_result(test: Test, printer: Printer) -> None: """ Prints result line with status of test. @@ -550,10 +555,11 @@ def print_test_result(test: Test) -> None: Parameters: test - Test object representing current test being printed + printer - Printer object """ - stdout.print_with_timestamp(format_test_result(test)) + printer.print_with_timestamp(format_test_result(test, printer)) -def print_test_footer(test: Test) -> None: +def print_test_footer(test: Test, printer: Printer) -> None: """ Prints test footer with status of test. @@ -562,10 +568,11 @@ def print_test_footer(test: Test) -> None: Parameters: test - Test object representing current test being printed + printer - Printer object to output results """ - message = format_test_result(test) - stdout.print_with_timestamp(format_test_divider(message, - len(message) - stdout.color_len())) + message = format_test_result(test, printer) + printer.print_with_timestamp(format_test_divider(message, + len(message) - printer.color_len())) @@ -601,7 +608,7 @@ def _summarize_failed_tests(test: Test) -> str: return 'Failures: ' + ', '.join(failures) -def print_summary_line(test: Test) -> None: +def print_summary_line(test: Test, printer: Printer) -> None: """ Prints summary line of test object. Color of line is dependent on status of test. Color is green if test passes, yellow if test is @@ -614,6 +621,7 @@ def print_summary_line(test: Test) -> None: Errors: 0" test - Test object representing current test being printed + printer - Printer object to output results """ if test.status == TestStatus.SUCCESS: color = stdout.green @@ -621,7 +629,7 @@ def print_summary_line(test: Test) -> None: color = stdout.yellow else: color = stdout.red - stdout.print_with_timestamp(color(f'Testing complete. {test.counts}')) + printer.print_with_timestamp(color(f'Testing complete. {test.counts}')) # Summarize failures that might have gone off-screen since we had a lot # of tests (arbitrarily defined as >=100 for now). @@ -630,7 +638,7 @@ def print_summary_line(test: Test) -> None: summarized = _summarize_failed_tests(test) if not summarized: return - stdout.print_with_timestamp(color(summarized)) + printer.print_with_timestamp(color(summarized)) # Other methods: @@ -654,7 +662,7 @@ def bubble_up_test_results(test: Test) -> None: elif test.counts.get_status() == TestStatus.TEST_CRASHED: test.status = TestStatus.TEST_CRASHED -def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: bool) -> Test: +def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: bool, printer: Printer) -> Test: """ Finds next test to parse in LineStream, creates new Test object, parses any subtests of the test, populates Test object with all @@ -710,6 +718,7 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: log - list of strings containing any preceding diagnostic lines corresponding to the current test is_subtest - boolean indicating whether test is a subtest + printer - Printer object to output results Return: Test object populated with characteristics and any subtests @@ -725,14 +734,14 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: # If parsing the main/top-level test, parse KTAP version line and # test plan test.name = "main" - ktap_line = parse_ktap_header(lines, test) + ktap_line = parse_ktap_header(lines, test, printer) test.log.extend(parse_diagnostic(lines)) parse_test_plan(lines, test) parent_test = True else: # If not the main test, attempt to parse a test header containing # the KTAP version line and/or subtest header line - ktap_line = parse_ktap_header(lines, test) + ktap_line = parse_ktap_header(lines, test, printer) subtest_line = parse_test_header(lines, test) parent_test = (ktap_line or subtest_line) if parent_test: @@ -740,7 +749,7 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: # to parse test plan and print test header test.log.extend(parse_diagnostic(lines)) parse_test_plan(lines, test) - print_test_header(test) + print_test_header(test, printer) expected_count = test.expected_count subtests = [] test_num = 1 @@ -758,16 +767,16 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: # If parser reaches end of test before # parsing expected number of subtests, print # crashed subtest and record error - test.add_error('missing expected subtest!') + test.add_error(printer, 'missing expected subtest!') sub_test.log.extend(sub_log) test.counts.add_status( TestStatus.TEST_CRASHED) - print_test_result(sub_test) + print_test_result(sub_test, printer) else: test.log.extend(sub_log) break else: - sub_test = parse_test(lines, test_num, sub_log, True) + sub_test = parse_test(lines, test_num, sub_log, True, printer) subtests.append(sub_test) test_num += 1 test.subtests = subtests @@ -775,51 +784,51 @@ def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: # If not main test, look for test result line test.log.extend(parse_diagnostic(lines)) if test.name != "" and not peek_test_name_match(lines, test): - test.add_error('missing subtest result line!') + test.add_error(printer, 'missing subtest result line!') else: - parse_test_result(lines, test, expected_num) + parse_test_result(lines, test, expected_num, printer) # Check for there being no subtests within parent test if parent_test and len(subtests) == 0: # Don't override a bad status if this test had one reported. # Assumption: no subtests means CRASHED is from Test.__init__() if test.status in (TestStatus.TEST_CRASHED, TestStatus.SUCCESS): - print_log(test.log) + print_log(test.log, printer) test.status = TestStatus.NO_TESTS - test.add_error('0 tests run!') + test.add_error(printer, '0 tests run!') # Add statuses to TestCounts attribute in Test object bubble_up_test_results(test) if parent_test and is_subtest: # If test has subtests and is not the main test object, print # footer. - print_test_footer(test) + print_test_footer(test, printer) elif is_subtest: - print_test_result(test) + print_test_result(test, printer) return test -def parse_run_tests(kernel_output: Iterable[str]) -> Test: +def parse_run_tests(kernel_output: Iterable[str], printer: Printer) -> Test: """ Using kernel output, extract KTAP lines, parse the lines for test results and print condensed test results and summary line. Parameters: kernel_output - Iterable object contains lines of kernel output + printer - Printer object to output results Return: Test - the main test object with all subtests. """ - stdout.print_with_timestamp(DIVIDER) + printer.print_with_timestamp(DIVIDER) lines = extract_tap_lines(kernel_output) test = Test() if not lines: test.name = '<missing>' - test.add_error('Could not find any KTAP output. Did any KUnit tests run?') + test.add_error(printer, 'Could not find any KTAP output. Did any KUnit tests run?') test.status = TestStatus.FAILURE_TO_PARSE_TESTS else: - test = parse_test(lines, 0, [], False) + test = parse_test(lines, 0, [], False, printer) if test.status != TestStatus.NO_TESTS: test.status = test.counts.get_status() - stdout.print_with_timestamp(DIVIDER) - print_summary_line(test) + printer.print_with_timestamp(DIVIDER) return test diff --git a/tools/testing/kunit/kunit_printer.py b/tools/testing/kunit/kunit_printer.py index 015adf87dc2c..2c55b4b67bfc 100644 --- a/tools/testing/kunit/kunit_printer.py +++ b/tools/testing/kunit/kunit_printer.py @@ -17,10 +17,12 @@ class Printer: def __init__(self, output: typing.IO[str]): self._output = output - self._use_color = output.isatty() + if output is not None: + self._use_color = output.isatty() def print(self, message: str) -> None: - print(message, file=self._output) + if self._output is not None: + print(message, file=self._output) def print_with_timestamp(self, message: str) -> None: ts = datetime.datetime.now().strftime('%H:%M:%S') @@ -46,3 +48,4 @@ class Printer: # Provides a default instance that prints to stdout stdout = Printer(sys.stdout) +null_printer = Printer(None) diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py index 2beb7327e53f..02aa296d8850 100755 --- a/tools/testing/kunit/kunit_tool_test.py +++ b/tools/testing/kunit/kunit_tool_test.py @@ -23,6 +23,7 @@ import kunit_parser import kunit_kernel import kunit_json import kunit +from kunit_printer import stdout test_tmpdir = '' abs_test_data_dir = '' @@ -139,28 +140,28 @@ class KUnitParserTest(unittest.TestCase): def test_parse_successful_test_log(self): all_passed_log = test_data_path('test_is_test_passed-all_passed.log') with open(all_passed_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual(result.counts.errors, 0) def test_parse_successful_nested_tests_log(self): all_passed_log = test_data_path('test_is_test_passed-all_passed_nested.log') with open(all_passed_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual(result.counts.errors, 0) def test_kselftest_nested(self): kselftest_log = test_data_path('test_is_test_passed-kselftest.log') with open(kselftest_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual(result.counts.errors, 0) def test_parse_failed_test_log(self): failed_log = test_data_path('test_is_test_passed-failure.log') with open(failed_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.FAILURE, result.status) self.assertEqual(result.counts.errors, 0) @@ -168,7 +169,7 @@ class KUnitParserTest(unittest.TestCase): empty_log = test_data_path('test_is_test_passed-no_tests_run_no_header.log') with open(empty_log) as file: result = kunit_parser.parse_run_tests( - kunit_parser.extract_tap_lines(file.readlines())) + kunit_parser.extract_tap_lines(file.readlines()), stdout) self.assertEqual(0, len(result.subtests)) self.assertEqual(kunit_parser.TestStatus.FAILURE_TO_PARSE_TESTS, result.status) self.assertEqual(result.counts.errors, 1) @@ -179,7 +180,7 @@ class KUnitParserTest(unittest.TestCase): with open(missing_plan_log) as file: result = kunit_parser.parse_run_tests( kunit_parser.extract_tap_lines( - file.readlines())) + file.readlines()), stdout) # A missing test plan is not an error. self.assertEqual(result.counts, kunit_parser.TestCounts(passed=10, errors=0)) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) @@ -188,7 +189,7 @@ class KUnitParserTest(unittest.TestCase): header_log = test_data_path('test_is_test_passed-no_tests_run_with_header.log') with open(header_log) as file: result = kunit_parser.parse_run_tests( - kunit_parser.extract_tap_lines(file.readlines())) + kunit_parser.extract_tap_lines(file.readlines()), stdout) self.assertEqual(0, len(result.subtests)) self.assertEqual(kunit_parser.TestStatus.NO_TESTS, result.status) self.assertEqual(result.counts.errors, 1) @@ -197,7 +198,7 @@ class KUnitParserTest(unittest.TestCase): no_plan_log = test_data_path('test_is_test_passed-no_tests_no_plan.log') with open(no_plan_log) as file: result = kunit_parser.parse_run_tests( - kunit_parser.extract_tap_lines(file.readlines())) + kunit_parser.extract_tap_lines(file.readlines()), stdout) self.assertEqual(0, len(result.subtests[0].subtests[0].subtests)) self.assertEqual( kunit_parser.TestStatus.NO_TESTS, @@ -210,7 +211,7 @@ class KUnitParserTest(unittest.TestCase): print_mock = mock.patch('kunit_printer.Printer.print').start() with open(crash_log) as file: result = kunit_parser.parse_run_tests( - kunit_parser.extract_tap_lines(file.readlines())) + kunit_parser.extract_tap_lines(file.readlines()), stdout) print_mock.assert_any_call(StrContains('Could not find any KTAP output.')) print_mock.stop() self.assertEqual(0, len(result.subtests)) @@ -219,7 +220,7 @@ class KUnitParserTest(unittest.TestCase): def test_skipped_test(self): skipped_log = test_data_path('test_skip_tests.log') with open(skipped_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) # A skipped test does not fail the whole suite. self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) @@ -228,7 +229,7 @@ class KUnitParserTest(unittest.TestCase): def test_skipped_all_tests(self): skipped_log = test_data_path('test_skip_all_tests.log') with open(skipped_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SKIPPED, result.status) self.assertEqual(result.counts, kunit_parser.TestCounts(skipped=5)) @@ -236,7 +237,7 @@ class KUnitParserTest(unittest.TestCase): def test_ignores_hyphen(self): hyphen_log = test_data_path('test_strip_hyphen.log') with open(hyphen_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) # A skipped test does not fail the whole suite. self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) @@ -250,7 +251,7 @@ class KUnitParserTest(unittest.TestCase): def test_ignores_prefix_printk_time(self): prefix_log = test_data_path('test_config_printk_time.log') with open(prefix_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual('kunit-resource-test', result.subtests[0].name) self.assertEqual(result.counts.errors, 0) @@ -258,7 +259,7 @@ class KUnitParserTest(unittest.TestCase): def test_ignores_multiple_prefixes(self): prefix_log = test_data_path('test_multiple_prefixes.log') with open(prefix_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual('kunit-resource-test', result.subtests[0].name) self.assertEqual(result.counts.errors, 0) @@ -266,7 +267,7 @@ class KUnitParserTest(unittest.TestCase): def test_prefix_mixed_kernel_output(self): mixed_prefix_log = test_data_path('test_interrupted_tap_output.log') with open(mixed_prefix_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual('kunit-resource-test', result.subtests[0].name) self.assertEqual(result.counts.errors, 0) @@ -274,7 +275,7 @@ class KUnitParserTest(unittest.TestCase): def test_prefix_poundsign(self): pound_log = test_data_path('test_pound_sign.log') with open(pound_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual('kunit-resource-test', result.subtests[0].name) self.assertEqual(result.counts.errors, 0) @@ -282,7 +283,7 @@ class KUnitParserTest(unittest.TestCase): def test_kernel_panic_end(self): panic_log = test_data_path('test_kernel_panic_interrupt.log') with open(panic_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.TEST_CRASHED, result.status) self.assertEqual('kunit-resource-test', result.subtests[0].name) self.assertGreaterEqual(result.counts.errors, 1) @@ -290,7 +291,7 @@ class KUnitParserTest(unittest.TestCase): def test_pound_no_prefix(self): pound_log = test_data_path('test_pound_no_prefix.log') with open(pound_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status) self.assertEqual('kunit-resource-test', result.subtests[0].name) self.assertEqual(result.counts.errors, 0) @@ -310,7 +311,7 @@ class KUnitParserTest(unittest.TestCase): not ok 2 - test2 not ok 1 - some_failed_suite """ - result = kunit_parser.parse_run_tests(output.splitlines()) + result = kunit_parser.parse_run_tests(output.splitlines(), stdout) self.assertEqual(kunit_parser.TestStatus.FAILURE, result.status) self.assertEqual(kunit_parser._summarize_failed_tests(result), @@ -319,7 +320,7 @@ class KUnitParserTest(unittest.TestCase): def test_ktap_format(self): ktap_log = test_data_path('test_parse_ktap_output.log') with open(ktap_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) self.assertEqual(result.counts, kunit_parser.TestCounts(passed=3)) self.assertEqual('suite', result.subtests[0].name) self.assertEqual('case_1', result.subtests[0].subtests[0].name) @@ -328,13 +329,13 @@ class KUnitParserTest(unittest.TestCase): def test_parse_subtest_header(self): ktap_log = test_data_path('test_parse_subtest_header.log') with open(ktap_log) as file: - kunit_parser.parse_run_tests(file.readlines()) + kunit_parser.parse_run_tests(file.readlines(), stdout) self.print_mock.assert_any_call(StrContains('suite (1 subtest)')) def test_parse_attributes(self): ktap_log = test_data_path('test_parse_attributes.log') with open(ktap_log) as file: - result = kunit_parser.parse_run_tests(file.readlines()) + result = kunit_parser.parse_run_tests(file.readlines(), stdout) # Test should pass with no errors self.assertEqual(result.counts, kunit_parser.TestCounts(passed=1, errors=0)) @@ -355,7 +356,7 @@ class KUnitParserTest(unittest.TestCase): Indented more. not ok 1 test1 """ - result = kunit_parser.parse_run_tests(output.splitlines()) + result = kunit_parser.parse_run_tests(output.splitlines(), stdout) self.assertEqual(kunit_parser.TestStatus.FAILURE, result.status) self.print_mock.assert_any_call(StrContains('Test output.')) @@ -544,7 +545,7 @@ class KUnitJsonTest(unittest.TestCase): def _json_for(self, log_file): with open(test_data_path(log_file)) as file: - test_result = kunit_parser.parse_run_tests(file) + test_result = kunit_parser.parse_run_tests(file, stdout) json_obj = kunit_json.get_json_result( test=test_result, metadata=kunit_json.Metadata()) @@ -810,7 +811,7 @@ class KUnitMainTest(unittest.TestCase): self.linux_source_mock.run_kernel.return_value = ['TAP version 14', 'init: random output'] + want got = kunit._list_tests(self.linux_source_mock, - kunit.KunitExecRequest(None, None, '.kunit', 300, 'suite*', '', None, None, 'suite', False, False)) + kunit.KunitExecRequest(None, None, False, '.kunit', 300, 'suite*', '', None, None, 'suite', False, False)) self.assertEqual(got, want) # Should respect the user's filter glob when listing tests. self.linux_source_mock.run_kernel.assert_called_once_with( @@ -823,7 +824,7 @@ class KUnitMainTest(unittest.TestCase): # Should respect the user's filter glob when listing tests. mock_tests.assert_called_once_with(mock.ANY, - kunit.KunitExecRequest(None, None, '.kunit', 300, 'suite*.test*', '', None, None, 'suite', False, False)) + kunit.KunitExecRequest(None, None, False, '.kunit', 300, 'suite*.test*', '', None, None, 'suite', False, False)) self.linux_source_mock.run_kernel.assert_has_calls([ mock.call(args=None, build_dir='.kunit', filter_glob='suite.test*', filter='', filter_action=None, timeout=300), mock.call(args=None, build_dir='.kunit', filter_glob='suite2.test*', filter='', filter_action=None, timeout=300), @@ -836,7 +837,7 @@ class KUnitMainTest(unittest.TestCase): # Should respect the user's filter glob when listing tests. mock_tests.assert_called_once_with(mock.ANY, - kunit.KunitExecRequest(None, None, '.kunit', 300, 'suite*', '', None, None, 'test', False, False)) + kunit.KunitExecRequest(None, None, False, '.kunit', 300, 'suite*', '', None, None, 'test', False, False)) self.linux_source_mock.run_kernel.assert_has_calls([ mock.call(args=None, build_dir='.kunit', filter_glob='suite.test1', filter='', filter_action=None, timeout=300), mock.call(args=None, build_dir='.kunit', filter_glob='suite.test2', filter='', filter_action=None, timeout=300), base-commit: 9852d85ec9d492ebef56dc5f229416c925758edc -- 2.47.0.163.g1226f6d8fa-goog

1 year

2
2
0 0

[PATCH net v2 0/2] bnxt: Fix failure to report RSS context in ntuple rule

by Daniel Xu

This patchset fixes a bug where bnxt driver was failing to report that an ntuple rule is redirecting to an RSS context. First commit is the fix, then second commit extends selftests to detect if other/new drivers are compliant with ntuple/rss_ctx API. Daniel Xu (2): bnxt_en: ethtool: Supply ntuple rss context action selftests: drv-net: rss_ctx: Add test for ntuple rule drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 8 ++++++-- tools/testing/selftests/drivers/net/hw/rss_ctx.py | 13 ++++++++++++- 2 files changed, 18 insertions(+), 3 deletions(-) -- 2.46.0

1 year

3
6
0 0

[PATCH 0/3] KVM: x86: Small changes to support VMware guests

by Zack Rusin

To be able to switch VMware products running on Linux to KVM some minor changes are required to let KVM run/resume unmodified VMware guests. First allow enabling of the VMware backdoor via an api. Currently the setting of the VMware backdoor is limited to kernel boot parameters, which forces all VM's running on a host to either run with or without the VMware backdoor. Add a simple cap to allow enabling of the VMware backdoor on a per VM basis. The default for that setting remains the kvm.enable_vmware_backdoor boot parameter (which is false by default) and can be changed on a per-vm basis via the KVM_CAP_X86_VMWARE_BACKDOOR cap. Second add a cap to forward hypercalls to userspace. I know that in general that's frowned upon but VMwre guests send quite a few hypercalls from userspace and it would be both impractical and largelly impossible to handle all in the kernel. The change is trivial and I'd be maintaining this code so I hope it's not a big deal. The third commit just adds a self-test for the "forward VMware hypercalls to userspace" functionality. Cc: Doug Covelli <doug.covelli(a)broadcom.com> Cc: Paolo Bonzini <pbonzini(a)redhat.com> Cc: Jonathan Corbet <corbet(a)lwn.net> Cc: Sean Christopherson <seanjc(a)google.com> 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: Namhyung Kim <namhyung(a)kernel.org> Cc: Arnaldo Carvalho de Melo <acme(a)redhat.com> Cc: Isaku Yamahata <isaku.yamahata(a)intel.com> Cc: Joel Stanley <joel(a)jms.id.au> Cc: Zack Rusin <zack.rusin(a)broadcom.com> Cc: kvm(a)vger.kernel.org Cc: linux-doc(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org Zack Rusin (3): KVM: x86: Allow enabling of the vmware backdoor via a cap KVM: x86: Add support for VMware guest specific hypercalls KVM: selftests: x86: Add a test for KVM_CAP_X86_VMWARE_HYPERCALL Documentation/virt/kvm/api.rst | 56 ++++++++- arch/x86/include/asm/kvm_host.h | 2 + arch/x86/kvm/emulate.c | 5 +- arch/x86/kvm/svm/svm.c | 6 +- arch/x86/kvm/vmx/vmx.c | 4 +- arch/x86/kvm/x86.c | 47 ++++++++ arch/x86/kvm/x86.h | 7 +- include/uapi/linux/kvm.h | 2 + tools/include/uapi/linux/kvm.h | 2 + tools/testing/selftests/kvm/Makefile | 1 + .../kvm/x86_64/vmware_hypercall_test.c | 108 ++++++++++++++++++ 11 files changed, 227 insertions(+), 13 deletions(-) create mode 100644 tools/testing/selftests/kvm/x86_64/vmware_hypercall_test.c -- 2.43.0

1 year

4
14
0 0

[PATCH 0/5] release of KTAP version 2

by Rae Moar

This patch series represents the final release of KTAP version 2. There have been having open discussions on version 2 for just over 2 years. This patch series marks the end of KTAP version 2 development and beginning of the KTAP version 3 development. The largest component of KTAP version 2 release is the addition of test metadata to the specification. KTAP metadata could include any test information that is pertinent for user interaction before or after the running of the test. For example, the test file path or the test speed. Example of KTAP Metadata: KTAP version 2 #:ktap_test: main #:ktap_arch: uml 1..1 KTAP version 2 #:ktap_test: suite_1 #:ktap_subsystem: example #:ktap_test_file: lib/test.c 1..2 ok 1 test_1 #:ktap_test: test_2 #:ktap_speed: very_slow # test_2 has begun #:custom_is_flaky: true ok 2 test_2 # suite_1 has passed ok 1 suite_1 The release also includes some formatting fixes and changes to update the specification to version 2. Frank Rowand (2): ktap_v2: change version to 2-rc in KTAP specification ktap_v2: change "version 1" to "version 2" in examples Rae Moar (3): ktap_v2: add test metadata ktap_v2: formatting fixes to ktap spec ktap_v2: change version to 2 in KTAP specification Documentation/dev-tools/ktap.rst | 276 +++++++++++++++++++++++++++++-- 1 file changed, 260 insertions(+), 16 deletions(-) base-commit: 2d5404caa8c7bb5c4e0435f94b28834ae5456623 -- 2.47.0.277.g8800431eea-goog

1 year

1
5
0 0

[PATCH] selftests/mm: Fix unused function warning for aarch64_write_signal_pkey()

by Catalin Marinas

Since commit 49f59573e9e0 ("selftests/mm: Enable pkey_sighandler_tests on arm64"), pkey_sighandler_tests.c (which includes pkey-arm64.h via pkey-helpers.h) ends up compiled for arm64. Since it doesn't use aarch64_write_signal_pkey(), the compiler warns: In file included from pkey-helpers.h:106, from pkey_sighandler_tests.c:31: pkey-arm64.h:130:13: warning: ‘aarch64_write_signal_pkey’ defined but not used [-Wunused-function] 130 | static void aarch64_write_signal_pkey(ucontext_t *uctxt, u64 pkey) | ^~~~~~~~~~~~~~~~~~~~~~~~~ Make the aarch64_write_signal_pkey() a 'static inline void' function to avoid the compiler warning. Fixes: f5b5ea51f78f ("selftests: mm: make protection_keys test work on arm64") Cc: Shuah Khan <skhan(a)linuxfoundation.org> Cc: Joey Gouly <joey.gouly(a)arm.com> Cc: Kevin Brodsky <kevin.brodsky(a)arm.com> Signed-off-by: Catalin Marinas <catalin.marinas(a)arm.com> --- I'll add this on top of the arm64 for-next/pkey-signal branch together with Kevin's other patches. tools/testing/selftests/mm/pkey-arm64.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/mm/pkey-arm64.h b/tools/testing/selftests/mm/pkey-arm64.h index d57fbeace38f..d9d2100eafc0 100644 --- a/tools/testing/selftests/mm/pkey-arm64.h +++ b/tools/testing/selftests/mm/pkey-arm64.h @@ -127,7 +127,7 @@ static inline u64 get_pkey_bits(u64 reg, int pkey) return 0; } -static void aarch64_write_signal_pkey(ucontext_t *uctxt, u64 pkey) +static inline void aarch64_write_signal_pkey(ucontext_t *uctxt, u64 pkey) { struct _aarch64_ctx *ctx = GET_UC_RESV_HEAD(uctxt); struct poe_context *poe_ctx =

1 year

2
2
0 0

[PATCH 0/4] kselftest/arm64: Fix compilation warnings/errors in the arm64 tests

by Catalin Marinas

It looks like people started ignoring the compiler warnings (or even errors) when building the arm64-specific kselftests. The first three patches are printf() arguments adjustment. The last one adds ".arch_extension sme", otherwise they fail to build (with my toolchain versions at least). Note for future kselftest contributors - try to keep them warning-free. Catalin Marinas (4): kselftest/arm64: Fix printf() compiler warnings in the arm64 fp tests kselftest/arm64: Fix printf() warning in the arm64 MTE prctl() test kselftest/arm64: Fix printf() compiler warnings in the arm64 syscall-abi.c tests kselftest/arm64: Fix compilation of SME instructions in the arm64 fp tests tools/testing/selftests/arm64/abi/syscall-abi.c | 8 ++++---- tools/testing/selftests/arm64/fp/sve-ptrace.c | 16 +++++++++------- tools/testing/selftests/arm64/fp/za-ptrace.c | 8 +++++--- tools/testing/selftests/arm64/fp/za-test.S | 1 + tools/testing/selftests/arm64/fp/zt-ptrace.c | 8 +++++--- tools/testing/selftests/arm64/fp/zt-test.S | 1 + tools/testing/selftests/arm64/mte/check_prctl.c | 2 +- 7 files changed, 26 insertions(+), 18 deletions(-)

1 year

2
16
0 0

[PATCH v2 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> --- Changes in v2: - Change instruction and commit log for corruption of predicat registers. - Link to v1: https://lore.kernel.org/r/20241023-arm64-fp-stress-irritator-v1-0-a51af298d… --- Mark Brown (6): kselftest/arm64: Correct misleading comments on fp-stress irritators kselftest/arm64: Remove unused ADRs from irritator handlers kselftest/arm64: Corrupt P0 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 | 8 +++----- tools/testing/selftests/arm64/fp/za-test.S | 13 ++++--------- tools/testing/selftests/arm64/fp/zt-test.S | 13 ++++--------- 6 files changed, 17 insertions(+), 27 deletions(-) --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241023-arm64-fp-stress-irritator-5415fe92adef Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year

2
8
0 0

[PATCH v2 0/3] kselftest/arm64: fp-ptrace enhancements

by Mark Brown

This series contains a bit of a grab bag of improvements to the floating point tests, mainly fp-ptrace. Globally over all the tests we start using defines from the generated sysregs (following the example of the KVM selftests) for SVCR, stop being quite so wasteful with registers when calling into the assembler code then expand the coverage of both ZA writes and FPMR (which was not there since fp-ptrace and the 2023 dpISA extensions were on the list at the same time). Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v2: - Drop attempt to reference sysreg-defs.h due to build issues, just import the defines directly into fp-ptrace. We can revisit later. - Link to v1: https://lore.kernel.org/r/20241107-arm64-fp-ptrace-fpmr-v1-0-3e5e0b6e3be9@k… --- Mark Brown (3): kselftets/arm64: Use flag bits for features in fp-ptrace assembler code kselftest/arm64: Expand the set of ZA writes fp-ptrace does kselftest/arm64: Add FPMR coverage to fp-ptrace tools/testing/selftests/arm64/fp/fp-ptrace-asm.S | 41 ++++-- tools/testing/selftests/arm64/fp/fp-ptrace.c | 161 +++++++++++++++++++++-- tools/testing/selftests/arm64/fp/fp-ptrace.h | 12 ++ tools/testing/selftests/arm64/fp/sme-inst.h | 2 + 4 files changed, 188 insertions(+), 28 deletions(-) --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241105-arm64-fp-ptrace-fpmr-ff061facd3da Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year

2
6
0 0

[PATCH] kselftest/arm64: Fix build with stricter assemblers

by Mark Brown

While some assemblers (including the LLVM assembler I mostly use) will happily accept SMSTART as an instruction by default others, specifically gas, require that any architecture extensions be explicitly enabled. The assembler SME test programs use manually encoded helpers for the new instructions but no SMSTART helper is defined, only SM and ZA specific variants. Unfortunately the irritators that were just added use plain SMSTART so on stricter assemblers these fail to build: za-test.S:160: Error: selected processor does not support `smstart' Switch to using SMSTART ZA via the manually encoded smstart_za macro we already have defined. Fixes: d65f27d240bb ("kselftest/arm64: Implement irritators for ZA and ZT") Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/arm64/fp/za-test.S | 2 +- tools/testing/selftests/arm64/fp/zt-test.S | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/arm64/fp/za-test.S b/tools/testing/selftests/arm64/fp/za-test.S index 95fdc1c1f228221bc812087a528e4b7c99767bba..9c33e13e9dc4a6f084649fe7d0fb838d9171e3aa 100644 --- a/tools/testing/selftests/arm64/fp/za-test.S +++ b/tools/testing/selftests/arm64/fp/za-test.S @@ -157,7 +157,7 @@ function irritator_handler // This will reset ZA to all bits 0 smstop - smstart + smstart_za ret endfunction diff --git a/tools/testing/selftests/arm64/fp/zt-test.S b/tools/testing/selftests/arm64/fp/zt-test.S index a90712802801efb97dc6bf8027fb9ceac8f0a895..38080f3c328042af6b3e2d7c3300162ea6efa4ea 100644 --- a/tools/testing/selftests/arm64/fp/zt-test.S +++ b/tools/testing/selftests/arm64/fp/zt-test.S @@ -126,7 +126,7 @@ function irritator_handler // This will reset ZT to all bits 0 smstop - smstart + smstart_za ret endfunction --- base-commit: 95ad089d464da2a4cd4511fb077f25994104c8f1 change-id: 20241108-arm64-selftest-asm-error-d78570e50b3b Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year

2
4
0 0

[PATCH] kselftest/arm64: Enable build of PAC tests with LLVM=1

by Mark Brown

Currently we don't build the PAC selftests when building with LLVM=1 since we attempt to test for PAC support in the toolchain before we've set up the build system to point at LLVM in lib.mk, which has to be one of the last things in the Makefile. Since all versions of LLVM supported for use with the kernel have PAC support we can just sidestep the issue by just assuming PAC is there when doing a LLVM=1 build. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/arm64/pauth/Makefile | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/arm64/pauth/Makefile b/tools/testing/selftests/arm64/pauth/Makefile index 72e290b0b10c1ea5bf1b84232f70844a601b8129..b5a1c80e0ead6932d2441a192b9758a049e3b3f8 100644 --- a/tools/testing/selftests/arm64/pauth/Makefile +++ b/tools/testing/selftests/arm64/pauth/Makefile @@ -7,8 +7,14 @@ CC := $(CROSS_COMPILE)gcc endif CFLAGS += -mbranch-protection=pac-ret + +# All supported LLVMs have PAC, test for GCC +ifeq ($(LLVM),1) +pauth_cc_support := 1 +else # check if the compiler supports ARMv8.3 and branch protection with PAuth pauth_cc_support := $(shell if ($(CC) $(CFLAGS) -march=armv8.3-a -E -x c /dev/null -o /dev/null 2>&1) then echo "1"; fi) +endif ifeq ($(pauth_cc_support),1) TEST_GEN_PROGS := pac --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241111-arm64-selftest-pac-clang-cb80de079169 Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year

2
1
0 0

[PATCH] kselftest/arm64: Check that SVCR is 0 in signal handlers

by Mark Brown

We don't currently validate that we exit streaming mode and clear ZA when we enter a signal handler. Add simple checks for this in the SSVE and ZA tests. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/arm64/signal/sve_helpers.h | 13 +++++++++++++ tools/testing/selftests/arm64/signal/testcases/ssve_regs.c | 5 +++++ tools/testing/selftests/arm64/signal/testcases/za_regs.c | 5 +++++ 3 files changed, 23 insertions(+) diff --git a/tools/testing/selftests/arm64/signal/sve_helpers.h b/tools/testing/selftests/arm64/signal/sve_helpers.h index 50948ce471cc620118a0c7c8df70d66dbdfbb160..ca133b93375fa587b5e02cd76b2f2fcd92591723 100644 --- a/tools/testing/selftests/arm64/signal/sve_helpers.h +++ b/tools/testing/selftests/arm64/signal/sve_helpers.h @@ -18,4 +18,17 @@ extern unsigned int nvls; int sve_fill_vls(bool use_sme, int min_vls); +static inline uint64_t get_svcr(void) +{ + uint64_t val; + + asm volatile ( + "mrs %0, S3_3_C4_C2_2\n" + : "=r"(val) + : + : "cc"); + + return val; +} + #endif diff --git a/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c b/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c index 6dbe48cf8b09ed8b7a5ab47690bd87e39e18e1e6..3dee68fa36d1cf2716f54d5f328b3f4077493c3b 100644 --- a/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/ssve_regs.c @@ -85,6 +85,11 @@ static int do_one_sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc, fprintf(stderr, "Got expected size %u and VL %d\n", head->size, ssve->vl); + if (get_svcr() != 0) { + fprintf(stderr, "Unexpected SVCR %llx\n", get_svcr()); + return 1; + } + return 0; } diff --git a/tools/testing/selftests/arm64/signal/testcases/za_regs.c b/tools/testing/selftests/arm64/signal/testcases/za_regs.c index b9e13f27f1f9aaf55db2a5e391f360993561d0b7..9fff4c50030414d06157e0da0c29fd794f707309 100644 --- a/tools/testing/selftests/arm64/signal/testcases/za_regs.c +++ b/tools/testing/selftests/arm64/signal/testcases/za_regs.c @@ -91,6 +91,11 @@ static int do_one_sme_vl(struct tdescr *td, siginfo_t *si, ucontext_t *uc, return 1; } + if (get_svcr() != 0) { + fprintf(stderr, "Unexpected SVCR %llx\n", get_svcr()); + return 1; + } + return 0; } --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241106-arm64-fpmr-signal-test-c0a0c5bf0174 Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year

2
3
0 0

[PATCH 0/2] kselftest/arm64: Avoid detecting spurious PAC key collisions

by Mark Brown

The PAC tests currently generate a very small number of false failures since the limited size of PAC keys, especially with fewer bits allocated for PAC due to larger VA, means collisions in generated PACs are possible even if the PAC keys are different. The test tries to work around this by testing repeatedly but doesn't iterate often enough to be reliable. We also fix a leak of file descriptors in the exec test which doesn't matter now but can become an issue when the number of iterations is increased, we can bump into limits on allocated file descriptors. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Mark Brown (2): kselftest/arm64: Don't leak pipe fds in pac.exec_sign_all() kselftest/arm64: Try harder to generate different keys during PAC tests tools/testing/selftests/arm64/pauth/pac.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241111-arm64-pac-test-collisions-5613f5dfe479 Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year

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[PATCH 0/4] kselftest/arm64: fp-ptrace enhancements

by Mark Brown

This series contains a bit of a grab bag of improvements to the floating point tests, mainly fp-ptrace. Globally over all the tests we start using defines from the generated sysregs (following the example of the KVM selftests) for SVCR, stop being quite so wasteful with registers when calling into the assembler code then expand the coverage of both ZA writes and FPMR (which was not there since fp-ptrace and the 2023 dpISA extensions were on the list at the same time). Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Mark Brown (4): kselftets/arm64: Use flag bits for features in fp-ptrace assembler code kselftest/arm64: Use a define for SVCR kselftest/arm64: Expand the set of ZA writes fp-ptrace does kselftest/arm64: Add FPMR coverage to fp-ptrace tools/testing/selftests/arm64/fp/Makefile | 20 ++- tools/testing/selftests/arm64/fp/fp-ptrace-asm.S | 52 +++++--- tools/testing/selftests/arm64/fp/fp-ptrace.c | 155 +++++++++++++++++++++-- tools/testing/selftests/arm64/fp/fp-ptrace.h | 16 ++- tools/testing/selftests/arm64/fp/sve-test.S | 5 +- tools/testing/selftests/arm64/fp/za-fork-asm.S | 3 +- tools/testing/selftests/arm64/fp/za-test.S | 6 +- tools/testing/selftests/arm64/fp/zt-test.S | 5 +- 8 files changed, 213 insertions(+), 49 deletions(-) --- base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354 change-id: 20241105-arm64-fp-ptrace-fpmr-ff061facd3da Best regards, -- Mark Brown <broonie(a)kernel.org>

1 year

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[PATCH] kunit: skb: add gfp to kernel doc for kunit_zalloc_skb()

by Dan Carpenter

Kuan-Wei Chiu pointed out that the kernel doc for kunit_zalloc_skb() needs to include the @gfp information. Add it. Reported-by: Kuan-Wei Chiu <visitorckw(a)gmail.com> Closes: https://lore.kernel.org/all/Zy+VIXDPuU613fFd@visitorckw-System-Product-Name/ Signed-off-by: Dan Carpenter <dan.carpenter(a)linaro.org> --- include/kunit/skbuff.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/kunit/skbuff.h b/include/kunit/skbuff.h index 345e1e8f0312..07784694357c 100644 --- a/include/kunit/skbuff.h +++ b/include/kunit/skbuff.h @@ -20,8 +20,9 @@ static void kunit_action_kfree_skb(void *p) * kunit_zalloc_skb() - Allocate and initialize a resource managed skb. * @test: The test case to which the skb belongs * @len: size to allocate + * @gfp: allocation flags * - * Allocate a new struct sk_buff with GFP_KERNEL, zero fill the give length + * Allocate a new struct sk_buff with gfp flags, zero fill the given length * and add it as a resource to the kunit test for automatic cleanup. * * Returns: newly allocated SKB, or %NULL on error -- 2.45.2

1 year

3
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[PATCH net-next v2 0/8] net: Improve netns handling in RTNL and ip_tunnel

by Xiao Liang

This patch series includes some netns-related improvements and fixes for RTNL and ip_tunnel, to make link creation more intuitive: - Creating link in another net namespace doesn't conflict with link names in current one. - Add a flag in rtnl_ops, to avoid netns change when link-netns is present if possible. - When creating ip tunnel (e.g. GRE) in another netns, use current as link-netns if not specified explicitly. So that # modprobe ip_gre netns_atomic=1 # ip link add netns ns1 link-netns ns2 tun0 type gre ... will create tun0 in ns1, rather than create it in ns2 and move to ns1. And don't conflict with another interface named "tun0" in current netns. --- v2: - Check NLM_F_EXCL to ensure only link creation is affected. - Add self tests for link name/ifindex conflict and notifications in different netns. - Changes in dummy driver and ynl in order to add the test case. v1: link: https://lore.kernel.org/all/20241023023146.372653-1-shaw.leon@gmail.com/ Xiao Liang (8): rtnetlink: Lookup device in target netns when creating link rtnetlink: Add netns_atomic flag in rtnl_link_ops net: ip_tunnel: Build flow in underlay net namespace net: ip_tunnel: Add source netns support for newlink net: ip_gre: Add netns_atomic module parameter net: dummy: Set netns_atomic in rtnl ops for testing tools/net/ynl: Add retry limit for async notification selftests: net: Add two test cases for link netns drivers/net/dummy.c | 1 + include/net/ip_tunnels.h | 3 ++ include/net/rtnetlink.h | 3 ++ net/core/rtnetlink.c | 17 +++++-- net/ipv4/ip_gre.c | 15 +++++- net/ipv4/ip_tunnel.c | 27 +++++++---- tools/net/ynl/lib/ynl.py | 7 ++- tools/testing/selftests/net/Makefile | 1 + tools/testing/selftests/net/netns-name.sh | 10 ++++ tools/testing/selftests/net/netns_atomic.py | 54 +++++++++++++++++++++ 10 files changed, 121 insertions(+), 17 deletions(-) create mode 100755 tools/testing/selftests/net/netns_atomic.py -- 2.47.0

1 year

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[PATCH net-next v10] 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> --- V10: selfttests in pmtu.sh: - remove unused fail var - Flip error messages 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 | 112 +++++++++++++++++++++++----- 2 files changed, 108 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..7ca2fbd971ae 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}" + ns_cmd="${1}"; shift - if [ -z "${dsfield}" ]; then - dsfield=0 - fi - - ${ns_cmd} ip route get "${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 +2377,36 @@ 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 + + # Ping and expect two nexthop exceptions for two routes + run_cmd ${ns_a} ping -q -M want -i 0.1 -c 1 -s 1800 "${host4_b_addr}" + + # 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" "${pmtu_a_R1}" "exceeding MTU (veth_A-R1)" || return 1 + check_pmtu_value "1500" "${pmtu_a_R2}" "exceeding MTU (veth_A-R2)" || return 1 +} + usage() { echo echo "$0 [OPTIONS] [TEST]..." base-commit: 66600fac7a984dea4ae095411f644770b2561ede -- 2.43.5

1 year

3
2
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[PATCH net-next] net: netconsole: selftests: Check if netdevsim is available

by Breno Leitao

The netconsole selftest relies on the availability of the netdevsim module. To ensure the test can run correctly, we need to check if the netdevsim module is either loaded or built-in before proceeding. Update the netconsole selftest to check for the existence of the /sys/bus/netdevsim/new_device file before running the test. If the file is not found, the test is skipped with an explanation that the CONFIG_NETDEVSIM kernel config option may not be enabled. Signed-off-by: Breno Leitao <leitao(a)debian.org> --- tools/testing/selftests/drivers/net/netcons_basic.sh | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/drivers/net/netcons_basic.sh b/tools/testing/selftests/drivers/net/netcons_basic.sh index 182eb1a97e59f3b4c9eea0e5b9e64a7fff656e2b..b175f4d966e5056ddb62e335f212c03e55f50fb0 100755 --- a/tools/testing/selftests/drivers/net/netcons_basic.sh +++ b/tools/testing/selftests/drivers/net/netcons_basic.sh @@ -39,6 +39,7 @@ NAMESPACE="" # IDs for netdevsim NSIM_DEV_1_ID=$((256 + RANDOM % 256)) NSIM_DEV_2_ID=$((512 + RANDOM % 256)) +NSIM_DEV_SYS_NEW="/sys/bus/netdevsim/new_device" # Used to create and delete namespaces source "${SCRIPTDIR}"/../../net/lib.sh @@ -46,7 +47,6 @@ source "${SCRIPTDIR}"/../../net/net_helper.sh # Create netdevsim interfaces create_ifaces() { - local NSIM_DEV_SYS_NEW=/sys/bus/netdevsim/new_device echo "$NSIM_DEV_2_ID" > "$NSIM_DEV_SYS_NEW" echo "$NSIM_DEV_1_ID" > "$NSIM_DEV_SYS_NEW" @@ -212,6 +212,11 @@ function check_for_dependencies() { exit "${ksft_skip}" fi + if [ ! -f "${NSIM_DEV_SYS_NEW}" ]; then + echo "SKIP: file ${NSIM_DEV_SYS_NEW} does not exist. Check if CONFIG_NETDEVSIM is enabled" >&2 + exit "${ksft_skip}" + fi + if [ ! -d "${NETCONS_CONFIGFS}" ]; then echo "SKIP: directory ${NETCONS_CONFIGFS} does not exist. Check if NETCONSOLE_DYNAMIC is enabled" >&2 exit "${ksft_skip}" --- base-commit: 4861333b42178fa3d8fd1bb4e2cfb2fedc968dba change-id: 20241108-netcon_selftest_deps-83f26456f095 Best regards, -- Breno Leitao <leitao(a)debian.org>

1 year

3
2
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[PATCH net-next v9 0/6] Suspend IRQs during application busy periods

by Joe Damato

Greetings: Welcome to v9, see changelog below. This revision addresses feedback Willem gave on the selftests. No functional or code changes to the implementation were made and performance tests were not re-run. 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. 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. ~ 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 nearly 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 shift between submissions, but the relative differences are equivalent. As patches are rebased, several factors likely influence overall performance. 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 199946 112 239 416 26 12973 11343 defer10 200K 199971 54 124 142 29 19412 17460 defer20 200K 199986 60 130 153 26 15644 14095 defer50 200K 200025 79 144 182 23 12122 11632 defer200 200K 199999 164 254 309 19 8923 9635 fullbusy 200K 199998 46 118 133 100 43658 23133 napibusy 200K 199983 100 237 277 56 24840 24716 suspend0 200K 200020 105 249 432 30 14264 11796 suspend10 200K 199950 53 123 141 32 19518 16903 suspend20 200K 200037 58 126 151 30 16426 14736 suspend50 200K 199961 73 136 177 26 13310 12633 suspend200 200K 199998 149 251 306 21 9566 10203 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 400K 400014 139 269 707 41 9476 9343 defer10 400K 400016 59 133 166 53 13991 12989 defer20 400K 399952 67 140 172 47 12063 11644 defer50 400K 400007 87 162 198 39 9384 9880 defer200 400K 399979 181 274 330 31 7089 8430 fullbusy 400K 399987 50 123 156 100 21827 16037 napibusy 400K 400014 76 222 272 83 18185 16529 suspend0 400K 400015 127 350 776 47 10699 9603 suspend10 400K 400023 57 129 164 54 13758 13178 suspend20 400K 400043 62 135 169 49 12071 11826 suspend50 400K 400071 76 149 186 42 10011 10301 suspend200 400K 399961 154 269 327 34 7827 8774 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 600K 599951 149 266 574 61 9265 8876 defer10 600K 600006 71 147 203 76 11866 10936 defer20 600K 600123 76 152 203 66 10430 10342 defer50 600K 600162 95 172 217 54 8526 9142 defer200 600K 599942 200 301 357 46 6977 8212 fullbusy 600K 599990 55 127 177 100 14551 13983 napibusy 600K 600035 63 160 250 96 13937 14140 suspend0 600K 599903 127 320 732 68 10166 8963 suspend10 600K 599908 63 137 192 69 10902 11100 suspend20 600K 599961 66 141 194 65 9976 10370 suspend50 600K 599973 80 159 204 57 8678 9381 suspend200 600K 600010 157 277 346 48 7133 8381 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 800K 800039 181 300 536 87 9585 8304 defer10 800K 800038 181 530 939 96 10564 8970 defer20 800K 800029 112 225 329 90 10056 8935 defer50 800K 799999 120 208 296 82 9234 8562 defer200 800K 800066 227 338 401 63 7117 8129 fullbusy 800K 800040 61 134 190 100 10913 12608 napibusy 800K 799944 64 141 214 99 10828 12588 suspend0 800K 799911 126 248 509 85 9346 8498 suspend10 800K 800006 69 143 200 83 9410 9845 suspend20 800K 800120 74 150 207 78 8786 9454 suspend50 800K 799989 87 168 224 71 7946 8833 suspend200 800K 799987 160 292 357 62 6923 8229 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base 1000K 906879 4079 5751 6216 98 9496 7904 defer10 1000K 860849 3643 6274 6730 99 10040 8676 defer20 1000K 896063 3298 5840 6349 98 9620 8237 defer50 1000K 919782 2962 5513 5807 97 9284 7951 defer200 1000K 970941 3059 5348 5984 95 8593 7959 fullbusy 1000K 999950 70 150 207 100 8732 10777 napibusy 1000K 999996 78 154 223 100 8722 10656 suspend0 1000K 949706 2666 5770 6660 99 9071 8046 suspend10 1000K 1000024 80 160 220 92 8137 9035 suspend20 1000K 1000059 83 165 226 89 7850 8804 suspend50 1000K 999955 95 180 240 84 7411 8459 suspend200 1000K 999914 163 299 366 77 6833 8078 testcase load qps avglat 95%lat 99%lat cpu cpq ipq base MAX 1037654 4184 5453 5810 100 8411 7938 defer10 MAX 905607 4840 6151 6380 100 9639 8431 defer20 MAX 986463 4455 5594 5796 100 8848 8110 defer50 MAX 1077030 4000 5073 5299 100 8104 7920 defer200 MAX 1040728 4152 5385 5765 100 8379 7849 fullbusy MAX 1247536 3518 3935 3984 100 6998 7930 napibusy MAX 1136310 3799 7756 9964 100 7670 7877 suspend0 MAX 1057509 4132 5724 6185 100 8253 7918 suspend10 MAX 1215147 3580 3957 4041 100 7185 7944 suspend20 MAX 1216469 3576 3953 3988 100 7175 7950 suspend50 MAX 1215871 3577 3961 4075 100 7181 7949 suspend200 MAX 1216882 3556 3951 3988 100 7175 7955 ~ 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 ? It is possible, but presents challenges for userspace. User applications must ensure that the file descriptors added to epoll contexts have the same NAPI ID to support busy polling. An epoll context is not permanently tied to any particular NAPI ID. So, a user application could decide to clear the file descriptors from the context and add a new set of file descriptors with a different NAPI ID to the context. Busy polling would work as expected, but the meaning of the suspend timeout becomes ambiguous because IRQs are not inherently associated with epoll contexts, but rather with the NAPI. The user program would need to reissue the ioctl to set the irq_suspend_timeout, but the napi_defer_hard_irqs and gro_flush_timeout settings would come from the NAPI's napi_config (which are set either by sysfs or by netlink). Such an interface seems awkard to use from a user perspective. Further, IRQs are related to NAPIs, which is why they are stored in the napi_config space. Putting the irq_suspend_timeout in the epoll context while other IRQ deferral mechanisms remain in the NAPI's napi_config space seems like an odd design choice. We've opted to keep all of the IRQ deferral parameters together and place the irq_suspend_timeout in napi_config. This has nice benefits for userspace: if a user app were to remove all file descriptors from an epoll context and add new file descriptors with a new NAPI ID, the correct suspend timeout for that NAPI ID would be used automatically without the user application needing to do anything (like re-issuing an ioctl, for example). All IRQ deferral related parameters are in one place and can all be set the same way: with netlink. - 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 v9: - Addresses Willem's feedback on the selftests in patch 5 by fixing the SPDX-License-Identifier, moving constants into variables in the test script, reducing code duplication, shortening long lines, and renaming variables to be more reader friendly. In the C test file, added a comment explaining the if def blob and changed a few types for strtoul. v8: https://lore.kernel.org/netdev/20241108045337.292905-1-jdamato@fastly.com/ - Update patch 2 to drop the exports, as requested by Jakub. v7: https://lore.kernel.org/netdev/20241108023912.98416-1-jdamato@fastly.com/ - Jakub noted that patch 2 adds unnecessary complexity by checking the suspend timeout in the NAPI loop. This makes the code more complicated and difficult to reason about. He's right; we've dropped patch 2 which simplifies this series. - Updated the cover letter with a full re-run of all test cases. - Updated FAQ #2. v6: https://lore.kernel.org/netdev/20241104215542.215919-1-jdamato@fastly.com/ - 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 (4): net: Add napi_struct parameter irq_suspend_timeout 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 | 39 ++ 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 | 165 +++++++++ tools/testing/selftests/net/busy_poller.c | 346 ++++++++++++++++++ 15 files changed, 809 insertions(+), 7 deletions(-) create mode 100755 tools/testing/selftests/net/busy_poll_test.sh create mode 100644 tools/testing/selftests/net/busy_poller.c base-commit: dc7c381bb8649e3701ed64f6c3e55316675904d7 -- 2.25.1

1 year

3
3
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[PATCH net-next v8 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. v8: - move error() calls into enable_reuseaddr() (Joe) - bail out when number of queues is 1 (Joe) - use socat instead of nc (Joe) - fix warning about string truncation buf[256]->buf[40] (Jakub) 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 | 789 ++++++++++++++++++ tools/testing/selftests/net/.gitignore | 1 - tools/testing/selftests/net/Makefile | 8 - tools/testing/selftests/net/ncdevmem.c | 570 ------------- 7 files changed, 844 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

1 year

4
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[PATCH net-next v3 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 v2 to v3: *) Modified hsr_ndo_vlan_rx_add_vid() to handle arbitrary HSR_PT_SLAVE_A, HSR_PT_SLAVE_B order and skip INTERLINK port in patch 2/4 as suggested by Paolo Abeni <pabeni(a)redhat.com> *) Removed handling of HSR_PT_MASTER in hsr_ndo_vlan_rx_kill_vid() as MASTER and INTERLINK port will be ignored anyway in the default switch case as suggested by Paolo Abeni <pabeni(a)redhat.com> *) Modified the selftest in patch 4/4 to use vlan by default. The test will check the exposed feature `vlan-challenged` and if vlan is not supported, skip the vlan test as suggested by Paolo Abeni <pabeni(a)redhat.com>. Test logs can be found at [1] 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> [1] https://gist.githubusercontent.com/danish-ti/d309f92c640134ccc4f2c0c442de5b… v1 https://lore.kernel.org/all/20241004074715.791191-1-danishanwar@ti.com/ v2 https://lore.kernel.org/all/20241024103056.3201071-1-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 | 85 +++++++++++++++-- net/hsr/hsr_forward.c | 19 +++- tools/testing/selftests/net/hsr/config | 1 + tools/testing/selftests/net/hsr/hsr_ping.sh | 98 ++++++++++++++++++++ 5 files changed, 236 insertions(+), 12 deletions(-) base-commit: a84e8c05f58305dfa808bc5465c5175c29d7c9b6 -- 2.34.1

1 year

3
6
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[PATCH net-next v7] 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: Omid Ehtemam-Haghighi <oeh.kernel(a)gmail.com> Cc: netdev(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org Cc: linux-kernel(a)vger.kernel.org --- v6 -> v7: * Rebased on top of 'net-next' 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 6383263bfd04..c134ba202c4c 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -1183,8 +1183,8 @@ 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, @@ -1245,7 +1245,7 @@ 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; } @@ -1963,7 +1963,7 @@ 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 d7ce5cf2017a..e23e653de158 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 26a4883a65c9..8c4db5199a42 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" YNL_GEN_FILES := ncdevmem 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..a6b2b1f9c641 --- /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

1 year

3
2
0 0

[PATCH net-next 0/8] macsec: inherit lower device's features and TSO limits when offloading

by Sabrina Dubroca

When macsec is offloaded to a NIC, we can take advantage of some of its features, mainly TSO and checksumming. This increases performance significantly. Some features cannot be inherited, because they require additional ops that aren't provided by the macsec netdevice. We also need to inherit TSO limits from the lower device, like VLAN/macvlan devices do. This series also moves the existing macsec offload selftest to the netdevsim selftests before adding tests for the new features. To allow this new selftest to work, netdevsim's hw_features are expanded. Sabrina Dubroca (8): netdevsim: add more hw_features selftests: netdevsim: add a test checking ethtool features macsec: add some of the lower device's features when offloading macsec: clean up local variables in macsec_notify macsec: inherit lower device's TSO limits when offloading selftests: move macsec offload tests from net/rtnetlink to drivers/net/netdvesim selftests: netdevsim: add test toggling macsec offload selftests: netdevsim: add ethtool features to macsec offload tests drivers/net/macsec.c | 64 +++++++--- drivers/net/netdevsim/netdev.c | 6 +- .../selftests/drivers/net/netdevsim/Makefile | 2 + .../selftests/drivers/net/netdevsim/config | 1 + .../drivers/net/netdevsim/ethtool-features.sh | 31 +++++ .../drivers/net/netdevsim/macsec-offload.sh | 117 ++++++++++++++++++ tools/testing/selftests/net/rtnetlink.sh | 68 ---------- 7 files changed, 200 insertions(+), 89 deletions(-) create mode 100644 tools/testing/selftests/drivers/net/netdevsim/ethtool-features.sh create mode 100755 tools/testing/selftests/drivers/net/netdevsim/macsec-offload.sh -- 2.47.0

1 year

3
17
0 0

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