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[PATCH v8 0/2] selftests/resctrl: SNC kernel support discovery

by Maciej Wieczor-Retman

Changes v8: - Fix Makefile changes. - Update cover letter SNC status information. - Add Reinette's reviewed by tag to patch 2/2. Changes v7: - Include fallthrough in resctrlfs.c. - Check fp after opening empty cpus file. - Correct a comment and merge strings in snprintf(). Changes v6: - Rebase onto latest kselftest-next. - Looking at the two patches with a fresh eye decided to make a split along the lines of: - Patch 1/2 contains all of the code that relates to SNC mode detection and checking that detection's reliability. - Patch 2/2 contains checking kernel support for SNC and modifying the messages at the end of affected tests. Changes v5: - Tests are skipped if snc_unreliable was set. - Moved resctrlfs.c changes from patch 2/2 to 1/2. - Removed CAT changes since it's not impacted by SNC in the selftest. - Updated various comments. - Fixed a bunch of minor issues pointed out in the review. Changes v4: - Printing SNC warnings at the start of every test. - Printing SNC warnings at the end of every relevant test. - Remove global snc_mode variable, consolidate snc detection functions into one. - Correct minor mistakes. Changes v3: - Reworked patch 2. - Changed minor things in patch 1 like function name and made corrections to the patch message. Changes v2: - Removed patches 2 and 3 since now this part will be supported by the kernel. Sub-Numa Clustering (SNC) allows splitting CPU cores, caches and memory into multiple NUMA nodes. When enabled, NUMA-aware applications can achieve better performance on bigger server platforms. SNC support was merged into the kernel [1]. With SNC enabled and kernel support in place all the tests will function normally (aside from effective cache size). There might be a problem when SNC is enabled but the system is still using an older kernel version without SNC support. Currently the only message displayed in that situation is a guess that SNC might be enabled and is causing issues. That message also is displayed whenever the test fails on an Intel platform. Add a mechanism to discover kernel support for SNC which will add more meaning and certainty to the error message. Add runtime SNC mode detection and verify how reliable that information is. Series was tested on Ice Lake server platforms with SNC disabled, SNC-2 and SNC-4. The tests were also ran with and without kernel support for SNC. Series applies cleanly on kselftest/next. [1] https://lore.kernel.org/all/20240716065458.GAZpYZQhh0PBItpD1k@fat_crate.loc… Previous versions of this series: [v1] https://lore.kernel.org/all/cover.1709721159.git.maciej.wieczor-retman@inte… [v2] https://lore.kernel.org/all/cover.1715769576.git.maciej.wieczor-retman@inte… [v3] https://lore.kernel.org/all/cover.1719842207.git.maciej.wieczor-retman@inte… [v4] https://lore.kernel.org/all/cover.1720774981.git.maciej.wieczor-retman@inte… [v5] https://lore.kernel.org/all/cover.1730206468.git.maciej.wieczor-retman@inte… [v6] https://lore.kernel.org/all/cover.1733136454.git.maciej.wieczor-retman@inte… [v7] https://lore.kernel.org/all/cover.1733741950.git.maciej.wieczor-retman@inte… Maciej Wieczor-Retman (2): selftests/resctrl: Adjust effective L3 cache size with SNC enabled selftests/resctrl: Discover SNC kernel support and adjust messages tools/testing/selftests/resctrl/Makefile | 1 + tools/testing/selftests/resctrl/cmt_test.c | 4 +- tools/testing/selftests/resctrl/mba_test.c | 2 + tools/testing/selftests/resctrl/mbm_test.c | 4 +- tools/testing/selftests/resctrl/resctrl.h | 6 + .../testing/selftests/resctrl/resctrl_tests.c | 9 +- tools/testing/selftests/resctrl/resctrlfs.c | 137 ++++++++++++++++++ 7 files changed, 158 insertions(+), 5 deletions(-) -- 2.47.1

1 day, 22 hours

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[PATCH v3 0/9] arm64: Support 2024 dpISA extensions

by Mark Brown

The 2024 architecture release includes a number of data processing extensions, mostly SVE and SME additions with a few others. These are all very straightforward extensions which add instructions but no architectural state so only need hwcaps and exposing of the ID registers to KVM guests and userspace. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- Changes in v3: - Commit log update for the hwcap test. - Link to v2: https://lore.kernel.org/r/20241030-arm64-2024-dpisa-v2-0-b6601a15d2a5@kerne… Changes in v2: - Filter KVM guest visible bitfields in ID_AA64ISAR3_EL1 to only those we make writeable. - Link to v1: https://lore.kernel.org/r/20241028-arm64-2024-dpisa-v1-0-a38d08b008a8@kerne… --- Mark Brown (9): arm64/sysreg: Update ID_AA64PFR2_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64ISAR3_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64FPFR0_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64ZFR0_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64SMFR0_EL1 to DDI0601 2024-09 arm64/sysreg: Update ID_AA64ISAR2_EL1 to DDI0601 2024-09 arm64/hwcap: Describe 2024 dpISA extensions to userspace KVM: arm64: Allow control of dpISA extensions in ID_AA64ISAR3_EL1 kselftest/arm64: Add 2024 dpISA extensions to hwcap test Documentation/arch/arm64/elf_hwcaps.rst | 51 ++++++ arch/arm64/include/asm/hwcap.h | 17 ++ arch/arm64/include/uapi/asm/hwcap.h | 17 ++ arch/arm64/kernel/cpufeature.c | 35 ++++ arch/arm64/kernel/cpuinfo.c | 17 ++ arch/arm64/kvm/sys_regs.c | 6 +- arch/arm64/tools/sysreg | 87 +++++++++- tools/testing/selftests/arm64/abi/hwcap.c | 273 +++++++++++++++++++++++++++++- 8 files changed, 493 insertions(+), 10 deletions(-) --- base-commit: 40384c840ea1944d7c5a392e8975ed088ecf0b37 change-id: 20241008-arm64-2024-dpisa-8091074a7f48 Best regards, -- Mark Brown <broonie(a)kernel.org>

1 day, 23 hours

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[PATCH v6 0/3] tracing: Support poll on event hist file

by Masami Hiramatsu (Google)

Hi, Here is the v6 patch to support polling on event 'hist' file. The previous version is here; https://lore.kernel.org/all/172398710447.295714.4489282566285719918.stgit@d… This version is rebased on the ftrace/for-next branch of the linux-trace tree, and use global irq_work and wq instead of per-event one. Background ---------- There has been interest in allowing user programs to monitor kernel events in real time. Ftrace provides `trace_pipe` interface to wait on events in the ring buffer, but it is needed to wait until filling up a page with events in the ring buffer. We can also peek the `trace` file periodically, but that is inefficient way to monitor a randomely happening event. Overview -------- This patch set allows user to `poll`(or `select`, `epoll`) on event histogram interface. As you know each event has its own `hist` file which shows histograms generated by trigger action. So user can set a new hist trigger on any event you want to monitor, and poll on the `hist` file until it is updated. There are 2 poll events are supported, POLLIN and POLLPRI. POLLIN means that there are any readable update on `hist` file and this event will be flashed only when you call read(). So, this is useful if you want to read the histogram periodically. The other POLLPRI event is for monitoring trace event. Like the POLLIN, this will be returned when the histogram is updated, but you don't need to read() the file and use poll() again. Note that this waits for histogram update (not event arrival), thus you must set a histogram on the event at first. Usage ----- Here is an example usage: ---- TRACEFS=/sys/kernel/tracing EVENT=$TRACEFS/events/sched/sched_process_free # setup histogram trigger and enable event echo "hist:key=comm" >> $EVENT/trigger echo 1 > $EVENT/enable # Wait for update poll pri $EVENT/hist # Event arrived. echo "process free event is comming" tail $TRACEFS/trace ---- The 'poll' command is in the selftest patch. You can take this series also from here; https://git.kernel.org/pub/scm/linux/kernel/git/mhiramat/linux.git/log/?h=t… Thank you, --- Masami Hiramatsu (Google) (3): tracing/hist: Add poll(POLLIN) support on hist file tracing/hist: Support POLLPRI event for poll on histogram selftests/tracing: Add hist poll() support test include/linux/trace_events.h | 14 +++ kernel/trace/trace_events.c | 14 +++ kernel/trace/trace_events_hist.c | 100 +++++++++++++++++++- tools/testing/selftests/ftrace/Makefile | 2 tools/testing/selftests/ftrace/poll.c | 74 +++++++++++++++ .../ftrace/test.d/trigger/trigger-hist-poll.tc | 74 +++++++++++++++ 6 files changed, 275 insertions(+), 3 deletions(-) create mode 100644 tools/testing/selftests/ftrace/poll.c create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-poll.tc -- Masami Hiramatsu (Google) <mhiramat(a)kernel.org>

2 days

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[PATCH v2 0/6] selftests: kvm: s390: Reject invalid ioctls on ucontrol VMs

by Christoph Schlameuss

This patch series adds more test case issuing ioctls to ucontrol VMs and its floating interrupt controller. The test cases trigger three possible null pointer dereferences within the handling of the KVM_DEV_FLIC_APF_ENABLE, KVM_DEV_FLIC_APF_DISABLE_WAIT and KVM_SET_GSI_ROUTING ioctl. All of these issues do only exist on ucontrol VMs. Fixes for the issues are included within the patch series. v2: - added documentation changes - simplify uc_flic_attrs; remove .getrc and .setrc from uc_flic_attrs (Thanks Claudio) Christoph Schlameuss (6): kvm: s390: Reject setting flic pfault attributes on ucontrol VMs selftests: kvm: s390: Add ucontrol flic attr selftests kvm: s390: Reject KVM_SET_GSI_ROUTING on ucontrol VMs selftests: kvm: s390: Add ucontrol gis routing test selftests: kvm: s390: Streamline uc_skey test to issue iske after sske selftests: kvm: s390: Add has device attr check to uc_attr_mem_limit selftest Documentation/virt/kvm/api.rst | 3 + Documentation/virt/kvm/devices/s390_flic.rst | 4 + arch/s390/kvm/interrupt.c | 6 + .../selftests/kvm/s390x/ucontrol_test.c | 194 ++++++++++++++++-- 4 files changed, 189 insertions(+), 18 deletions(-) -- 2.47.1

2 days

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[PATCH bpf-next/net v2 0/7] bpf: Add mptcp_subflow bpf_iter support

by Matthieu Baerts (NGI0)

Here is a series from Geliang, adding mptcp_subflow bpf_iter support. We are working on extending MPTCP with BPF, e.g. to control the path manager -- in charge of the creation, deletion, and announcements of subflows (paths) -- and the packet scheduler -- in charge of selecting which available path the next data will be sent to. These extensions need to iterate over the list of subflows attached to an MPTCP connection, and do some specific actions via some new kfunc that will be added later on. This preparation work is split in different patches: - Patch 1: extend bpf_skc_to_mptcp_sock() to be called with msk. - Patch 2: allow using skc_to_mptcp_sock() in CGroup sockopt hooks. - Patch 3: register some "basic" MPTCP kfunc. - Patch 4: add mptcp_subflow bpf_iter support. Note that previous versions of this single patch have already been shared to the BPF mailing list. The changelog has been kept with a comment, but the version number has been reset to avoid confusions. - Patch 5: add kfunc to make sure the msk is valid - Patch 6: add more MPTCP endpoints in the selftests, in order to create more than 2 subflows. - Patch 7: add a very simple test validating mptcp_subflow bpf_iter support. This test could be written without the new bpf_iter, but it is there only to make sure this specific feature works as expected. Signed-off-by: Matthieu Baerts (NGI0) <matttbe(a)kernel.org> --- Changes in v2: - Patches 1-2: new ones. - Patch 3: remove two kfunc, more restrictions. (Martin) - Patch 4: add BUILD_BUG_ON(), more restrictions. (Martin) - Patch 7: adaptations due to modifications in patches 1-4. - Link to v1: https://lore.kernel.org/r/20241108-bpf-next-net-mptcp-bpf_iter-subflows-v1-… --- Geliang Tang (7): bpf: Extend bpf_skc_to_mptcp_sock to MPTCP sock bpf: Allow use of skc_to_mptcp_sock in cg_sockopt bpf: Register mptcp common kfunc set bpf: Add mptcp_subflow bpf_iter bpf: Acquire and release mptcp socket selftests/bpf: More endpoints for endpoint_init selftests/bpf: Add mptcp_subflow bpf_iter subtest include/net/mptcp.h | 4 +- kernel/bpf/cgroup.c | 2 + net/core/filter.c | 2 +- net/mptcp/bpf.c | 113 +++++++++++++++++- tools/testing/selftests/bpf/bpf_experimental.h | 8 ++ tools/testing/selftests/bpf/prog_tests/mptcp.c | 129 ++++++++++++++++++++- tools/testing/selftests/bpf/progs/mptcp_bpf.h | 9 ++ .../testing/selftests/bpf/progs/mptcp_bpf_iters.c | 63 ++++++++++ 8 files changed, 318 insertions(+), 12 deletions(-) --- base-commit: dad704ebe38642cd405e15b9c51263356391355c change-id: 20241108-bpf-next-net-mptcp-bpf_iter-subflows-027f6d87770e Best regards, -- Matthieu Baerts (NGI0) <matttbe(a)kernel.org>

2 days, 1 hour

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[PATCH v2] selftests: arm coresight: sysfsmode testing

by Linu Cherian

Add sysfs mode selftest for ARM Coresight hardware tracer. The test will run below sequence for all possible sinks for every trace source available on the system. 1. Enable source and sink device to start tracing in sysfs mode 3. Run a standard dd command to be traced 4. Stop tracing 5. Readback tracedata - Test case is pass if the readback of tracedata is success else failure. - In case of ETR sink, the test is run with both default buffer mode and reserved buffer mode(if available). Sample output: selftests: drivers/hwtracing/coresight: sysfs_test_trace.sh Running sysfs trace with default settings 64+0 records in 64+0 records out 67108864 bytes (67 MB, 64 MiB) copied, 0.196945 s, 341 MB/s 32+0 records in 32+0 records out 16384 bytes (16 kB, 16 KiB) copied, 0.000805288 s, 20.3 MB/s CoreSight path testing (CPU0 -> tmc_etf0): PASS Signed-off-by: Linu Cherian <lcherian(a)marvell.com> --- Changelog from v1: - Added test description in commit message suggested by Shuah - Added config dependency file suggested by Shuah - Added TARGETS as suggested by James - Skipped TPIU as suggested by James - Added Reviewed-by tag tools/testing/selftests/Makefile | 1 + .../drivers/hwtracing/coresight/Makefile | 5 + .../drivers/hwtracing/coresight/config | 7 + .../hwtracing/coresight/sysfs_test_trace.sh | 146 ++++++++++++++++++ 4 files changed, 159 insertions(+) create mode 100644 tools/testing/selftests/drivers/hwtracing/coresight/Makefile create mode 100644 tools/testing/selftests/drivers/hwtracing/coresight/config create mode 100755 tools/testing/selftests/drivers/hwtracing/coresight/sysfs_test_trace.sh diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index 363d031a16f7..15788c32de6b 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -18,6 +18,7 @@ TARGETS += devices/error_logs TARGETS += devices/probe TARGETS += dmabuf-heaps TARGETS += drivers/dma-buf +TARGETS += drivers/hwtracing/coresight TARGETS += drivers/s390x/uvdevice TARGETS += drivers/net TARGETS += drivers/net/bonding diff --git a/tools/testing/selftests/drivers/hwtracing/coresight/Makefile b/tools/testing/selftests/drivers/hwtracing/coresight/Makefile new file mode 100644 index 000000000000..7dc68ae1c0a9 --- /dev/null +++ b/tools/testing/selftests/drivers/hwtracing/coresight/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 + +TEST_PROGS = sysfs_test_trace.sh + +include ../../../lib.mk diff --git a/tools/testing/selftests/drivers/hwtracing/coresight/config b/tools/testing/selftests/drivers/hwtracing/coresight/config new file mode 100644 index 000000000000..47e9256957d3 --- /dev/null +++ b/tools/testing/selftests/drivers/hwtracing/coresight/config @@ -0,0 +1,7 @@ +CONFIG_CORESIGHT=y +CONFIG_CORESIGHT_LINKS_AND_SINKS=y +CONFIG_CORESIGHT_LINK_AND_SINK_TMC=y +CONFIG_CORESIGHT_SINK_ETBV10 +CONFIG_CORESIGHT_SOURCE_ETM3X +CONFIG_CORESIGHT_SOURCE_ETM4X=y +CONFIG_CORESIGHT_TRBE=y diff --git a/tools/testing/selftests/drivers/hwtracing/coresight/sysfs_test_trace.sh b/tools/testing/selftests/drivers/hwtracing/coresight/sysfs_test_trace.sh new file mode 100755 index 000000000000..1939bbede1af --- /dev/null +++ b/tools/testing/selftests/drivers/hwtracing/coresight/sysfs_test_trace.sh @@ -0,0 +1,146 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# Copyright (C) 2024 Marvell. + +# Test Arm CoreSight trace capture in sysfs mode +# Based on tools/perf/tests/shell/test_arm_coresight.sh + +glb_err=0 + +arm_cs_report() { + if [ $2 != 0 ]; then + echo "$1: FAIL" + glb_err=$2 + else + echo "$1: PASS" + fi +} + +is_device_sink() { + # If the node of "enable_sink" is existed under the device path, this + # means the device is a sink device. Need to exclude 'tpiu' since it + # doesn't have a readable file. + echo "$1" | grep -E -q -v "tpiu" + + if [ $? -eq 0 ] && [ -e "$1/enable_sink" ]; then + + return 0 + else + return 1 + fi +} + +# Configure sink for buffer mode +cfg_sink_buf_mode() { + sink_dev=$1 + mode=$2 + # Set buffer mode if supported + if [ -e "$sink_dev/buf_modes_available" ]; then + cat $sink_dev/buf_modes_available | grep -E -q $mode + if [ $? -eq 0 ]; then + echo $mode > $sink_dev/buf_mode_preferred + return 0 + fi + fi + + return 1 +} + +run_app() { + + taskset -c $1 dd if=/dev/urandom of=/dev/null bs=1M count=64 +} + +sysfs_trace() { + src_dev=$1 + sink_dev=$2 + cpu=$3 + + # Enable sink device + echo 1 > $sink_dev/enable_sink + # Enable source device + echo 1 > $src_dev/enable_source + + # Run app to be traced + run_app $cpu + + # Read back trace data + dd if=/dev/$sink_dev_name of=/tmp/tracedata + + # Verify if read is successful + err=$? + + # Disable source device + echo 0 > $src_dev/enable_source + + # Diskable sink device + echo 0 > $sink_dev/enable_sink + + arm_cs_report "CoreSight path testing (CPU$cpu -> $sink_dev_name)" $err +} + +try_sysfs_trace_resrv_buf() { + src_dev=$1 + sink_dev=$2 + cpu=$3 + + # Configure the resrved buffer mode if available + cfg_sink_buf_mode $sink_dev "resrv" + if [ $? -eq 0 ]; then + echo "Running sysfs trace with resrv buf mode" + sysfs_trace $src_dev $sink_dev $cpu + # Restore buffer mode + cfg_sink_buf_mode $sink_dev "auto" + if [ $? -eq 1 ]; then + echo "Failed to restore default buf mode" + fi + fi +} + +arm_cs_iterate_devices() { + src_dev=$1 + cpu=$3 + for cdev in $2/connections/out\:*; do + + # Skip testing if it's not a directory + ! [ -d $cdev ] && continue; + + # Read out its symbol link file name + sink_dev=`readlink -f $cdev` + + # Extract device name from path, e.g. + # sink_dev = '/sys/devices/platform/20010000.etf/tmc_etf0' + # `> sink_dev_name = 'tmc_etf0' + sink_dev_name=$(basename $sink_dev) + + if is_device_sink $sink_dev; then + # Run trace with resrv buf mode (if available) + try_sysfs_trace_resrv_buf $src_dev $sink_dev $cpu + + # Run the default mode + echo "Running sysfs trace with default settings" + sysfs_trace $src_dev $sink_dev $cpu + fi + + arm_cs_iterate_devices $src_dev $cdev $cpu + + done +} + +arm_cs_etm_traverse_path_test() { + # Iterate for every ETM device + for dev in /sys/bus/event_source/devices/cs_etm/cpu*; do + # Canonicalize the path + dev=`readlink -f $dev` + + # Find the ETM device belonging to which CPU + cpu=`cat $dev/cpu` + + # Use depth-first search (DFS) to iterate outputs + arm_cs_iterate_devices $dev $dev $cpu + done +} + +arm_cs_etm_traverse_path_test + +exit $glb_err -- 2.34.1

2 days, 2 hours

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[PATCH] selftests/bpf: Fix compilation error in get_uprobe_offset()

by Jerome Marchand

In get_uprobe_offset(), the call to procmap_query() use the constant PROCMAP_QUERY_VMA_EXECUTABLE, even if PROCMAP_QUERY is not defined. Define PROCMAP_QUERY_VMA_EXECUTABLE when PROCMAP_QUERY isn't. Fixes: 4e9e07603ecd ("selftests/bpf: make use of PROCMAP_QUERY ioctl if available") Signed-off-by: Jerome Marchand <jmarchan(a)redhat.com> --- tools/testing/selftests/bpf/trace_helpers.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/testing/selftests/bpf/trace_helpers.c b/tools/testing/selftests/bpf/trace_helpers.c index 2d742fdac6b9..51fa29e0e083 100644 --- a/tools/testing/selftests/bpf/trace_helpers.c +++ b/tools/testing/selftests/bpf/trace_helpers.c @@ -293,6 +293,9 @@ static int procmap_query(int fd, const void *addr, __u32 query_flags, size_t *st return 0; } #else + +#define PROCMAP_QUERY_VMA_EXECUTABLE 0x04 + static int procmap_query(int fd, const void *addr, __u32 query_flags, size_t *start, size_t *offset, int *flags) { return -EOPNOTSUPP; -- 2.47.1

2 days, 4 hours

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[PATCH for-next 0/2] selftests: Fix run_tests and install for net TARGET

by Li Zhijian

This patch set intends to fix the errors in install and run_tests when 'O=' is specified. such as `make O=/path/to/build TARGETS=net kselftest-install` Li Zhijian (2): selftests/Makefile: Create BUILD_TARGET directory for INSTALL_DEP_TARGETS selftests/Makefile: add INSTALL_DEP_TARGETS to run_tests tools/testing/selftests/Makefile | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- 2.44.0

2 days, 7 hours

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[PATCH 0/5] riscv: add support for Zaamo and Zalrsc extensions

by Clément Léger

Since commit e87412e621f1 ("integrate Zaamo and Zalrsc text (#1304)"), the A extension has been described as a set of instructions provided by Zaamo and Zalrsc. Add these two extensions. This series is based on the Zc one [1]. Link: https://lore.kernel.org/linux-riscv/20240619113529.676940-1-cleger@rivosinc… --- Clément Léger (5): dt-bindings: riscv: add Zaamo and Zalrsc ISA extension description riscv: add parsing for Zaamo and Zalrsc extensions riscv: hwprobe: export Zaamo and Zalrsc extensions RISC-V: KVM: Allow Zaamo/Zalrsc extensions for Guest/VM KVM: riscv: selftests: Add Zaamo/Zalrsc extensions to get-reg-list test Documentation/arch/riscv/hwprobe.rst | 8 ++++++++ .../devicetree/bindings/riscv/extensions.yaml | 19 +++++++++++++++++++ arch/riscv/include/asm/hwcap.h | 2 ++ arch/riscv/include/uapi/asm/hwprobe.h | 2 ++ arch/riscv/include/uapi/asm/kvm.h | 2 ++ arch/riscv/kernel/cpufeature.c | 9 ++++++++- arch/riscv/kernel/sys_hwprobe.c | 2 ++ arch/riscv/kvm/vcpu_onereg.c | 4 ++++ .../selftests/kvm/riscv/get-reg-list.c | 8 ++++++++ 9 files changed, 55 insertions(+), 1 deletion(-) -- 2.45.2

2 days, 9 hours

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[PATCH net-next v6 00/11] net: Improve netns handling in rtnetlink

by Xiao Liang

This patch series includes some netns-related improvements and fixes for rtnetlink, to make link creation more intuitive: 1) Creating link in another net namespace doesn't conflict with link names in current one. 2) Refector rtnetlink link creation. Create link in target namespace directly. 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 01 servers for 1) to avoids link name conflict in different netns. To achieve 2), there're mainly 3 steps: - Patch 02 packs newlink() parameters into a struct, including the original "src_net" along with more netns context. - Patch 03 ~ 07 converts device drivers to use the explicit netns extracted from params. - Patch 08 ~ 09 removes the old netns parameter, and converts rtnetlink to create device in target netns directly. Patch 10 ~ 11 adds some tests for link name and link netns. BTW please note there're some issues found in current code: - In amt_newlink() drivers/net/amt.c: amt->net = net; ... amt->stream_dev = dev_get_by_index(net, ... Uses net, but amt_lookup_upper_dev() only searches in dev_net. So the AMT device may not be properly deleted if it's in a different netns from lower dev. - In gtp_newlink() in drivers/net/gtp.c: gtp->net = src_net; ... gn = net_generic(dev_net(dev), gtp_net_id); list_add_rcu(&gtp->list, &gn->gtp_dev_list); Uses src_net, but priv is linked to list in dev_net. So it may not be properly deleted on removal of link netns. - In pfcp_newlink() in drivers/net/pfcp.c: pfcp->net = net; ... pn = net_generic(dev_net(dev), pfcp_net_id); list_add_rcu(&pfcp->list, &pn->pfcp_dev_list); Same as above. - In lowpan_newlink() in net/ieee802154/6lowpan/core.c: wdev = dev_get_by_index(dev_net(ldev), nla_get_u32(tb[IFLA_LINK])); Looks for IFLA_LINK in dev_net, but in theory the ifindex is defined in link netns. --- v6: - Split prototype, driver and rtnetlink changes. - Add more tests for link netns. - Fix IPv6 tunnel net overwriten in ndo_init(). - Reorder variable declarations. - Exclude a ip_tunnel-specific patch. v5: link: https://lore.kernel.org/all/20241209140151.231257-1-shaw.leon@gmail.com/ - Fix function doc in batman-adv. - Include peer_net in rtnl newlink parameters. v4: link: https://lore.kernel.org/all/20241118143244.1773-1-shaw.leon@gmail.com/ - Pack newlink() parameters to a single struct. - Use ynl async_msg_queue.empty() in selftest. v3: link: https://lore.kernel.org/all/20241113125715.150201-1-shaw.leon@gmail.com/ - 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/ Xiao Liang (11): rtnetlink: Lookup device in target netns when creating link rtnetlink: Pack newlink() params into struct net: Use link netns in newlink() of rtnl_link_ops ieee802154: 6lowpan: Use link netns in newlink() of rtnl_link_ops net: ip_tunnel: Use link netns in newlink() of rtnl_link_ops net: ipv6: Use link netns in newlink() of rtnl_link_ops net: xfrm: Use link netns in newlink() of rtnl_link_ops rtnetlink: Remove "net" from newlink params rtnetlink: Create link directly in target net namespace selftests: net: Add python context manager for netns entering selftests: net: Add test cases for link and peer netns drivers/infiniband/ulp/ipoib/ipoib_netlink.c | 11 +- drivers/net/amt.c | 16 +- drivers/net/bareudp.c | 11 +- drivers/net/bonding/bond_netlink.c | 8 +- drivers/net/can/dev/netlink.c | 4 +- drivers/net/can/vxcan.c | 9 +- .../ethernet/qualcomm/rmnet/rmnet_config.c | 11 +- drivers/net/geneve.c | 11 +- drivers/net/gtp.c | 9 +- drivers/net/ipvlan/ipvlan.h | 4 +- drivers/net/ipvlan/ipvlan_main.c | 15 +- drivers/net/ipvlan/ipvtap.c | 10 +- drivers/net/macsec.c | 15 +- drivers/net/macvlan.c | 8 +- drivers/net/macvtap.c | 11 +- drivers/net/netkit.c | 9 +- drivers/net/pfcp.c | 11 +- drivers/net/ppp/ppp_generic.c | 10 +- drivers/net/team/team_core.c | 7 +- drivers/net/veth.c | 9 +- drivers/net/vrf.c | 11 +- drivers/net/vxlan/vxlan_core.c | 11 +- drivers/net/wireguard/device.c | 11 +- drivers/net/wireless/virtual/virt_wifi.c | 14 +- drivers/net/wwan/wwan_core.c | 25 ++- include/net/ip_tunnels.h | 5 +- include/net/rtnetlink.h | 44 +++++- net/8021q/vlan_netlink.c | 15 +- net/batman-adv/soft-interface.c | 16 +- net/bridge/br_netlink.c | 12 +- net/caif/chnl_net.c | 6 +- net/core/rtnetlink.c | 35 +++-- net/hsr/hsr_netlink.c | 14 +- net/ieee802154/6lowpan/core.c | 9 +- net/ipv4/ip_gre.c | 27 ++-- net/ipv4/ip_tunnel.c | 10 +- net/ipv4/ip_vti.c | 10 +- net/ipv4/ipip.c | 14 +- net/ipv6/ip6_gre.c | 42 ++++-- net/ipv6/ip6_tunnel.c | 20 ++- net/ipv6/ip6_vti.c | 16 +- net/ipv6/sit.c | 18 ++- net/xfrm/xfrm_interface_core.c | 15 +- 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/link_netns.py | 142 ++++++++++++++++++ tools/testing/selftests/net/netns-name.sh | 10 ++ 48 files changed, 546 insertions(+), 226 deletions(-) create mode 100755 tools/testing/selftests/net/link_netns.py -- 2.47.1

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