February 2025 - Linux-kselftest-mirror

[PATCH v2 0/6] cleanups, fixes, and progress towards avoiding "make headers"

by John Hubbard

Jeff Xu, I apologize for this churn: I was forced to drop your Reviewed-by and Tested-by tags from 2 of the 3 mseal patches, because the __NR_mseal fix is completely different now. Changes since v1: a) Reworked the mseal fix to use the kernel's in-tree unistd*.h files, instead of hacking in a __NR_mseal definition directly. (Thanks to David Hildenbrand for pointing out that this needed to be done.) b) Fixed the subject line of the kvm and mdwe patch. c) Reordered the patches so as to group the mseal changes together. d) ADDED an additional patch, 6/6, to remove various __NR_xx items and checks from the mm selftests. Cover letter, updated for v2: Eventually, once the build succeeds on a sufficiently old distro, the idea is to delete $(KHDR_INCLUDES) from the selftests/mm build, and then after that, from selftests/lib.mk and all of the other selftest builds. For now, this series merely achieves a clean build of selftests/mm on a not-so-old distro: Ubuntu 23.04. In other words, after this series is applied, it is possible to delete $(KHDR_INCLUDES) from selftests/mm/Makefile and the build will still succeed. 1. Add tools/uapi/asm/unistd_[32|x32|64].h files, which include definitions of __NR_mseal, and include them (indirectly) from the files that use __NR_mseal. The new files are copied from ./usr/include/asm, which is how we have agreed to do this sort of thing, see [1]. 2. Add fs.h, similarly created: it was copied directly from a snapshot of ./usr/include/linux/fs.h after running "make headers". 3. Add a few selected prctl.h values that the ksm and mdwe tests require. 4. Factor out some common code from mseal_test.c and seal_elf.c, into a new mseal_helpers.h file. 5. Remove local __NR_* definitions and checks. [1] commit e076eaca5906 ("selftests: break the dependency upon local header files") John Hubbard (6): selftests/mm: mseal, self_elf: fix missing __NR_mseal selftests/mm: mseal, self_elf: factor out test macros and other duplicated items selftests/mm: mseal, self_elf: rename TEST_END_CHECK to REPORT_TEST_PASS selftests/mm: fix vm_util.c build failures: add snapshot of fs.h selftests/mm: kvm, mdwe fixes to avoid requiring "make headers" selftests/mm: remove local __NR_* definitions tools/include/uapi/asm/unistd_32.h | 458 ++++++++++++++++++ tools/include/uapi/asm/unistd_64.h | 380 +++++++++++++++ tools/include/uapi/asm/unistd_x32.h | 369 ++++++++++++++ tools/include/uapi/linux/fs.h | 392 +++++++++++++++ tools/testing/selftests/mm/hugepage-mremap.c | 2 +- .../selftests/mm/ksm_functional_tests.c | 8 +- tools/testing/selftests/mm/mdwe_test.c | 1 + tools/testing/selftests/mm/memfd_secret.c | 14 +- tools/testing/selftests/mm/mkdirty.c | 8 +- tools/testing/selftests/mm/mlock2.h | 1 + tools/testing/selftests/mm/mrelease_test.c | 2 +- tools/testing/selftests/mm/mseal_helpers.h | 41 ++ tools/testing/selftests/mm/mseal_test.c | 143 ++---- tools/testing/selftests/mm/pagemap_ioctl.c | 2 +- tools/testing/selftests/mm/protection_keys.c | 2 +- tools/testing/selftests/mm/seal_elf.c | 37 +- tools/testing/selftests/mm/uffd-common.c | 4 - tools/testing/selftests/mm/uffd-stress.c | 16 +- tools/testing/selftests/mm/uffd-unit-tests.c | 14 +- tools/testing/selftests/mm/vm_util.h | 15 + 20 files changed, 1717 insertions(+), 192 deletions(-) create mode 100644 tools/include/uapi/asm/unistd_32.h create mode 100644 tools/include/uapi/asm/unistd_64.h create mode 100644 tools/include/uapi/asm/unistd_x32.h create mode 100644 tools/include/uapi/linux/fs.h create mode 100644 tools/testing/selftests/mm/mseal_helpers.h base-commit: 2ccbdf43d5e758f8493a95252073cf9078a5fea5 -- 2.45.2

7 months

4
22
0 0

[PATCH] selftests/vDSO: fix GNU hash table entry size for s390x

by Thomas Weißschuh

Commit 14be4e6f3522 ("selftests: vDSO: fix ELF hash table entry size for s390x") changed the type of the ELF hash table entries to 64bit on s390x. However the *GNU* hash tables entries are always 32bit. The "bucket" pointer is shared between both hash algorithms. On s390x the GNU algorithm assigns and dereferences this 64bit pointer as a 32bit pointer, leading to compiler warnings and runtime crashes. Introduce a new dedicated "gnu_bucket" pointer which is used by the GNU hash. Fixes: e0746bde6f82 ("selftests/vDSO: support DT_GNU_HASH") Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> --- tools/testing/selftests/vDSO/parse_vdso.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/vDSO/parse_vdso.c b/tools/testing/selftests/vDSO/parse_vdso.c index 2fe5e983cb22f1ed066d0310a54f6aef2ed77ed8..f89d052c730eb43eea28d69ca27b56e897503e16 100644 --- a/tools/testing/selftests/vDSO/parse_vdso.c +++ b/tools/testing/selftests/vDSO/parse_vdso.c @@ -53,7 +53,7 @@ static struct vdso_info /* Symbol table */ ELF(Sym) *symtab; const char *symstrings; - ELF(Word) *gnu_hash; + ELF(Word) *gnu_hash, *gnu_bucket; ELF_HASH_ENTRY *bucket, *chain; ELF_HASH_ENTRY nbucket, nchain; @@ -185,8 +185,8 @@ void vdso_init_from_sysinfo_ehdr(uintptr_t base) /* The bucket array is located after the header (4 uint32) and the bloom * filter (size_t array of gnu_hash[2] elements). */ - vdso_info.bucket = vdso_info.gnu_hash + 4 + - sizeof(size_t) / 4 * vdso_info.gnu_hash[2]; + vdso_info.gnu_bucket = vdso_info.gnu_hash + 4 + + sizeof(size_t) / 4 * vdso_info.gnu_hash[2]; } else { vdso_info.nbucket = hash[0]; vdso_info.nchain = hash[1]; @@ -268,11 +268,11 @@ void *vdso_sym(const char *version, const char *name) if (vdso_info.gnu_hash) { uint32_t h1 = gnu_hash(name), h2, *hashval; - i = vdso_info.bucket[h1 % vdso_info.nbucket]; + i = vdso_info.gnu_bucket[h1 % vdso_info.nbucket]; if (i == 0) return 0; h1 |= 1; - hashval = vdso_info.bucket + vdso_info.nbucket + + hashval = vdso_info.gnu_bucket + vdso_info.nbucket + (i - vdso_info.gnu_hash[1]); for (;; i++) { ELF(Sym) *sym = &vdso_info.symtab[i]; --- base-commit: 2014c95afecee3e76ca4a56956a936e23283f05b change-id: 20250213-selftests-vdso-s390-gnu-hash-7206671abc85 Best regards, -- Thomas Weißschuh <thomas.weissschuh(a)linutronix.de>

7 months

2
2
0 0

[PATCH v2 0/2] unicode: kunit: refactor selftest to kunit tests

by Pedro Orlando

Hey all, We are making these changes as part of a KUnit Hackathon at LKCamp [1]. This patch sets out to refactor fs/unicode/utf8-selftest.c to KUnit tests. The main benefit of this change is that we can leverage KUnit's test suite for quickly compiling and testing the functions in utf8, instead of compiling the kernel and loading the previous utf8-selftest module, as well as adopting a pattern across all kernel tests. The first commit is the refactoring itself from self test into KUnit, which kept the original test logic intact -- maintaining the purpose of the original tests -- with the added benefit of including these tests into the KUnit test suite. The second commit applies the naming style and file path conventions defined on Documentation/dev-tools/kunit/style.rst We appreciate any feedback and suggestions. :) [1] https://lkcamp.dev/about/ Co-developed-by: Pedro Orlando <porlando(a)lkcamp.dev> Signed-off-by: Pedro Orlando <porlando(a)lkcamp.dev> Co-developed-by: Danilo Pereira <dpereira(a)lkcamp.dev> Signed-off-by: Danilo Pereira <dpereira(a)lkcamp.dev> Signed-off-by: Gabriela Bittencourt <gbittencourt(a)lkcamp.dev> Gabriela Bittencourt (2): unicode: kunit: refactor selftest to kunit tests unicode: kunit: change tests filename and path fs/unicode/Kconfig | 5 +- fs/unicode/Makefile | 2 +- fs/unicode/tests/.kunitconfig | 3 + .../{utf8-selftest.c => tests/utf8_kunit.c} | 149 ++++++++---------- 4 files changed, 76 insertions(+), 83 deletions(-) create mode 100644 fs/unicode/tests/.kunitconfig rename fs/unicode/{utf8-selftest.c => tests/utf8_kunit.c} (64%) -- 2.34.1

7 months

6
11
0 0

[PATCH v2 0/6] KUnit test moves / renames

by Kees Cook

Hi, This is rebased to v6.14-rc2. I'll carry it and folks can send me new tests, etc, as needed to minimize future collisions. v1: https://lore.kernel.org/lkml/20241011072509.3068328-2-davidgow@google.com/ Thanks! -Kees Bruno Sobreira França (1): lib/math: Add int_log test suite Diego Vieira (1): lib/tests/kfifo_kunit.c: add tests for the kfifo structure Gabriela Bittencourt (2): unicode: kunit: refactor selftest to kunit tests unicode: kunit: change tests filename and path Kees Cook (1): lib: Move KUnit tests into tests/ subdirectory Luis Felipe Hernandez (1): lib: math: Move KUnit tests into tests/ subdir MAINTAINERS | 19 +- fs/unicode/Kconfig | 5 +- fs/unicode/Makefile | 2 +- fs/unicode/tests/.kunitconfig | 3 + .../{utf8-selftest.c => tests/utf8_kunit.c} | 149 ++++++------ fs/unicode/utf8-norm.c | 2 +- lib/Kconfig.debug | 27 ++- lib/Makefile | 39 +-- lib/math/Makefile | 5 +- lib/math/tests/Makefile | 4 +- lib/math/tests/int_log_kunit.c | 74 ++++++ .../rational_kunit.c} | 0 lib/tests/Makefile | 41 ++++ lib/{ => tests}/bitfield_kunit.c | 0 lib/{ => tests}/checksum_kunit.c | 0 lib/{ => tests}/cmdline_kunit.c | 0 lib/{ => tests}/cpumask_kunit.c | 0 lib/{ => tests}/crc_kunit.c | 0 lib/{ => tests}/fortify_kunit.c | 0 lib/{ => tests}/hashtable_test.c | 0 lib/{ => tests}/is_signed_type_kunit.c | 0 lib/tests/kfifo_kunit.c | 224 ++++++++++++++++++ lib/{ => tests}/kunit_iov_iter.c | 0 lib/{ => tests}/list-test.c | 0 lib/{ => tests}/memcpy_kunit.c | 0 lib/{ => tests}/overflow_kunit.c | 0 lib/{ => tests}/siphash_kunit.c | 0 lib/{ => tests}/slub_kunit.c | 0 lib/{ => tests}/stackinit_kunit.c | 0 lib/{ => tests}/string_helpers_kunit.c | 0 lib/{ => tests}/string_kunit.c | 0 lib/{ => tests}/test_bits.c | 0 lib/{ => tests}/test_fprobe.c | 0 lib/{ => tests}/test_hash.c | 0 lib/{ => tests}/test_kprobes.c | 0 lib/{ => tests}/test_linear_ranges.c | 0 lib/{ => tests}/test_list_sort.c | 0 lib/{ => tests}/test_sort.c | 0 lib/{ => tests}/usercopy_kunit.c | 0 lib/{ => tests}/util_macros_kunit.c | 0 40 files changed, 458 insertions(+), 136 deletions(-) create mode 100644 fs/unicode/tests/.kunitconfig rename fs/unicode/{utf8-selftest.c => tests/utf8_kunit.c} (64%) create mode 100644 lib/math/tests/int_log_kunit.c rename lib/math/{rational-test.c => tests/rational_kunit.c} (100%) rename lib/{ => tests}/bitfield_kunit.c (100%) rename lib/{ => tests}/checksum_kunit.c (100%) rename lib/{ => tests}/cmdline_kunit.c (100%) rename lib/{ => tests}/cpumask_kunit.c (100%) rename lib/{ => tests}/crc_kunit.c (100%) rename lib/{ => tests}/fortify_kunit.c (100%) rename lib/{ => tests}/hashtable_test.c (100%) rename lib/{ => tests}/is_signed_type_kunit.c (100%) create mode 100644 lib/tests/kfifo_kunit.c rename lib/{ => tests}/kunit_iov_iter.c (100%) rename lib/{ => tests}/list-test.c (100%) rename lib/{ => tests}/memcpy_kunit.c (100%) rename lib/{ => tests}/overflow_kunit.c (100%) rename lib/{ => tests}/siphash_kunit.c (100%) rename lib/{ => tests}/slub_kunit.c (100%) rename lib/{ => tests}/stackinit_kunit.c (100%) rename lib/{ => tests}/string_helpers_kunit.c (100%) rename lib/{ => tests}/string_kunit.c (100%) rename lib/{ => tests}/test_bits.c (100%) rename lib/{ => tests}/test_fprobe.c (100%) rename lib/{ => tests}/test_hash.c (100%) rename lib/{ => tests}/test_kprobes.c (100%) rename lib/{ => tests}/test_linear_ranges.c (100%) rename lib/{ => tests}/test_list_sort.c (100%) rename lib/{ => tests}/test_sort.c (100%) rename lib/{ => tests}/usercopy_kunit.c (100%) rename lib/{ => tests}/util_macros_kunit.c (100%) -- 2.34.1

7 months

4
11
0 0

[PATCH] selftests/nolibc: split up architecture list in run-tests.sh

by Thomas Weißschuh

The list is getting overly long and any modifications introduce a lot of noise and are prone to conflicts. Split the string into a bash array and break that into multiple lines. Signed-off-by: Thomas Weißschuh <linux(a)weissschuh.net> --- tools/testing/selftests/nolibc/run-tests.sh | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/nolibc/run-tests.sh b/tools/testing/selftests/nolibc/run-tests.sh index bc4e92b4f1b98278a0a72345a5cd67f1a429b6a2..6db01115276888bc89f6ec5532153c37e55c83d3 100755 --- a/tools/testing/selftests/nolibc/run-tests.sh +++ b/tools/testing/selftests/nolibc/run-tests.sh @@ -17,7 +17,16 @@ perform_download=0 test_mode=system werror=1 llvm= -archs="i386 x86_64 arm64 arm mips32le mips32be ppc ppc64 ppc64le riscv32 riscv64 s390 loongarch" +all_archs=( + i386 x86_64 + arm64 arm + mips32le mips32be + ppc ppc64 ppc64le + riscv32 riscv64 + s390 + loongarch +) +archs="${all_archs[@]}" TEMP=$(getopt -o 'j:d:c:b:a:m:pelh' -n "$0" -- "$@") --- base-commit: 665fa8dea90d9fbc0e7137c7e1315d6f7e15757e change-id: 20250211-nolibc-test-archs-a5990cfc9e52 Best regards, -- Thomas Weißschuh <linux(a)weissschuh.net>

7 months

1
1
0 0

selftest/vDSO: vdso_test_abi tests with gcc-13 and pass with clang-19

by Naresh Kamboju

The kselftest-vDSO/vdso_test_abi test encounters failures when built and executed using GCC-13 on armv7 architecture. The issue has been observed on both TI X15 devices and QEMU-armv7. Interestingly, the same test passes without any issues when built using Clang-19.This failure is specific to GCC-13. but test case should have been failed on clang toolchain but it did not. The Clang toolchain likely defaults to the traditional 32-bit time_t on 32-bit Debian Trixie (except x86), leading to an ABI issue similar to older compilers. This is affecting compatibility. This is not a new regression, this report generated on Linux next but also seen on Linux stable tree. Test name: kselftest-vDSO/vdso_test_abi Fails: gcc-13 pass: clang-19 Arnd Bergmann investigated and proposed a patch which fixes the problem. Test regression: selftest-vDSO/vdso_test_abi: Reported-by: Linux Kernel Functional Testing <lkft(a)linaro.org> # selftests: vDSO: vdso_test_abi # TAP version 13 # 1..16 # # [vDSO kselftest] VDSO_VERSION: LINUX_2.6 # # The time is 184285885525887.-5268386858514840748 # ok 1 __vdso_gettimeofday # # clock_id: CLOCK_REALTIME # # The time is 184287230099877759.-1225334784 # ok 2 __vdso_clock_gettime CLOCK_REALTIME # # The vdso resolution is 4294967296 -1225335584 # # The syscall resolution is 4294967296 -1225334784 # not ok 3 __vdso_clock_getres CLOCK_REALTIME # # clock_id: CLOCK_BOOTTIME # # The time is 3253049749439251215.-1225334784 # ok 4 __vdso_clock_gettime CLOCK_BOOTTIME # # The vdso resolution is 4294967296 -1225335584 # # The syscall resolution is 4294967296 -1225334784 # not ok 5 __vdso_clock_getres CLOCK_BOOTTIME # # clock_id: CLOCK_TAI # # The time is 184549377723756415.-1225334784 # ok 6 __vdso_clock_gettime CLOCK_TAI # # The vdso resolution is 4294967296 -1225335584 # # The syscall resolution is 4294967296 -1225334784 # not ok 7 __vdso_clock_getres CLOCK_TAI # # clock_id: CLOCK_REALTIME_COARSE # # The time is 128974845965660031.-1225334784 # ok 8 __vdso_clock_gettime CLOCK_REALTIME_COARSE # # The vdso resolution is 42949672960000000 -1225335584 # # The syscall resolution is 42949672960000000 -1225334784 # not ok 9 __vdso_clock_getres CLOCK_REALTIME_COARSE # # clock_id: CLOCK_MONOTONIC # # The time is 3253311892768162575.-1225334784 # ok 10 __vdso_clock_gettime CLOCK_MONOTONIC # # The vdso resolution is 4294967296 -1225335584 # # The syscall resolution is 4294967296 -1225334784 # not ok 11 __vdso_clock_getres CLOCK_MONOTONIC # # clock_id: CLOCK_MONOTONIC_RAW # # The time is 3253442966580101903.-1225334784 # ok 12 __vdso_clock_gettime CLOCK_MONOTONIC_RAW # # The vdso resolution is 4294967296 -1225335584 # # The syscall resolution is 4294967296 -1225334784 # not ok 13 __vdso_clock_getres CLOCK_MONOTONIC_RAW # # clock_id: CLOCK_MONOTONIC_COARSE # # The time is 3197606291493094159.-1225334784 # ok 14 __vdso_clock_gettime CLOCK_MONOTONIC_COARSE # # The vdso resolution is 42949672960000000 -1225335584 # # The syscall resolution is 42949672960000000 -1225334784 # not ok 15 __vdso_clock_getres CLOCK_MONOTONIC_COARSE # # Couldn't find __vdso_time # ok 16 # SKIP __vdso_time # # 1 skipped test(s) detected. Consider enabling relevant config options to improve coverage. # # Totals: pass:8 fail:7 xfail:0 xpass:0 skip:1 error:0 not ok 3 selftests: vDSO: vdso_test_abi # exit=1 ## Build * test log: https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20241126/te… * TI x15 test log: https://lkft.validation.linaro.org/scheduler/job/8117196#L7091 * build link: https://storage.tuxsuite.com/public/linaro/lkft/builds/2spp0E2mMNQq16RHsbzL… ## Source * git tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git * git sha: df5d6180169ae06a2eac57e33b077ad6f6252440 (this not new issue) * architectures: armv7 * toolchain: gcc-13 (13.3.0) - failed * toolchain: clang ( version: 19.1.7) - pass * devices: Armv7 TI beaglebone, qemu-armv7 -- Linaro LKFT https://lkft.linaro.org

7 months

2
1
0 0

[PATCH] ww_mutex: convert self-test to KUnit

by Tamir Duberstein

Convert this unit test to a KUnit test. Signed-off-by: Tamir Duberstein <tamird(a)gmail.com> --- I tested this using: $ tools/testing/kunit/kunit.py run --arch arm64 --make_options LLVM=1 ww_mutex On success: ; [12:48:16] ================== ww_mutex (5 subtests) =================== ; [12:48:16] ======================= test_mutex ======================== ; [12:48:16] [PASSED] flags=0 ; [12:48:16] [PASSED] flags=1 ; [12:48:16] [PASSED] flags=2 ; [12:48:16] [PASSED] flags=3 ; [12:48:16] [PASSED] flags=4 ; [12:48:17] [PASSED] flags=5 ; [12:48:17] [PASSED] flags=6 ; [12:48:17] [PASSED] flags=7 ; [12:48:17] =================== [PASSED] test_mutex ==================== ; [12:48:17] ========================= test_aa ========================= ; [12:48:17] [PASSED] lock ; [12:48:17] [PASSED] trylock ; [12:48:17] ===================== [PASSED] test_aa ===================== ; [12:48:17] ======================== test_abba ======================== ; [12:48:17] [PASSED] trylock=0,resolve=0 ; [12:48:17] [PASSED] trylock=1,resolve=1 ; [12:48:17] [PASSED] trylock=0,resolve=0 ; [12:48:17] [PASSED] trylock=1,resolve=1 ; [12:48:17] ==================== [PASSED] test_abba ==================== ; [12:48:17] ======================= test_cycle ======================== ; [12:48:17] [PASSED] nthreads=2 ; [12:48:17] =================== [PASSED] test_cycle ==================== ; [12:48:21] ========================= stress ========================== ; [12:48:21] [PASSED] nlocks=16,nthreads_per_cpu=2,flags=1 ; [12:48:23] [PASSED] nlocks=16,nthreads_per_cpu=2,flags=2 ; [12:48:23] [PASSED] nlocks=2046,nthreads_per_cpu=3,flags=7 ; [12:48:23] ===================== [PASSED] stress ====================== ; [12:48:23] ==================== [PASSED] ww_mutex ===================== ; [12:48:23] ============================================================ ; [12:48:23] Testing complete. Ran 18 tests: passed: 18 On failure: --- kernel/locking/Makefile | 3 +- .../locking/{test-ww_mutex.c => ww_mutex_kunit.c} | 311 ++++++++++----------- lib/Kconfig.debug | 12 +- tools/testing/selftests/locking/ww_mutex.sh | 19 -- 4 files changed, 163 insertions(+), 182 deletions(-) diff --git a/kernel/locking/Makefile b/kernel/locking/Makefile index 0db4093d17b8..26af3e88fffa 100644 --- a/kernel/locking/Makefile +++ b/kernel/locking/Makefile @@ -30,5 +30,6 @@ obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock.o obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o obj-$(CONFIG_QUEUED_RWLOCKS) += qrwlock.o obj-$(CONFIG_LOCK_TORTURE_TEST) += locktorture.o -obj-$(CONFIG_WW_MUTEX_SELFTEST) += test-ww_mutex.o obj-$(CONFIG_LOCK_EVENT_COUNTS) += lock_events.o + +obj-$(CONFIG_WW_MUTEX_KUNIT_TEST) += ww_mutex_kunit.o diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/ww_mutex_kunit.c similarity index 67% rename from kernel/locking/test-ww_mutex.c rename to kernel/locking/ww_mutex_kunit.c index bcb1b9fea588..ba89a4a702f9 100644 --- a/kernel/locking/test-ww_mutex.c +++ b/kernel/locking/ww_mutex_kunit.c @@ -3,10 +3,10 @@ * Module-based API test facility for ww_mutexes */ -#include <linux/kernel.h> - +#include <kunit/test.h> #include <linux/completion.h> #include <linux/delay.h> +#include <linux/kernel.h> #include <linux/kthread.h> #include <linux/module.h> #include <linux/prandom.h> @@ -54,12 +54,39 @@ static void test_mutex_work(struct work_struct *work) ww_mutex_unlock(&mtx->mutex); } -static int __test_mutex(unsigned int flags) +static const unsigned int *gen_range( + unsigned int *storage, + const unsigned int min, + const unsigned int max, + const int *prev) +{ + if (prev != NULL) { + if (*prev >= max) + return NULL; + *storage = *prev + 1; + } else { + *storage = min; + } + return storage; +} + +static const void *test_mutex_gen_params(const void *prev, char *desc) +{ + static unsigned int storage; + const unsigned int *next = gen_range(&storage, 0, __TEST_MTX_LAST - 1, prev); + + if (next != NULL) + snprintf(desc, KUNIT_PARAM_DESC_SIZE, "flags=%x", *next); + return next; +} + +static void test_mutex(struct kunit *test) { #define TIMEOUT (HZ / 16) + const unsigned int *param = test->param_value; + const unsigned int flags = *param; struct test_mutex mtx; struct ww_acquire_ctx ctx; - int ret; ww_mutex_init(&mtx.mutex, &ww_class); if (flags & TEST_MTX_CTX) @@ -79,53 +106,42 @@ static int __test_mutex(unsigned int flags) if (flags & TEST_MTX_SPIN) { unsigned long timeout = jiffies + TIMEOUT; - ret = 0; do { if (completion_done(&mtx.done)) { - ret = -EINVAL; + KUNIT_FAIL(test, "mutual exclusion failure"); break; } cond_resched(); } while (time_before(jiffies, timeout)); } else { - ret = wait_for_completion_timeout(&mtx.done, TIMEOUT); + KUNIT_EXPECT_EQ(test, wait_for_completion_timeout(&mtx.done, TIMEOUT), 0); } ww_mutex_unlock(&mtx.mutex); if (flags & TEST_MTX_CTX) ww_acquire_fini(&ctx); - if (ret) { - pr_err("%s(flags=%x): mutual exclusion failure\n", - __func__, flags); - ret = -EINVAL; - } - flush_work(&mtx.work); destroy_work_on_stack(&mtx.work); - return ret; #undef TIMEOUT } -static int test_mutex(void) +static const void *test_aa_gen_params(const void *prev, char *desc) { - int ret; - int i; + static unsigned int storage; + const unsigned int *next = gen_range(&storage, 0, 1, prev); - for (i = 0; i < __TEST_MTX_LAST; i++) { - ret = __test_mutex(i); - if (ret) - return ret; - } - - return 0; + if (next != NULL) + snprintf(desc, KUNIT_PARAM_DESC_SIZE, *next ? "trylock" : "lock"); + return next; } -static int test_aa(bool trylock) +static void test_aa(struct kunit *test) { + const unsigned int *param = test->param_value; + const bool trylock = *param; struct ww_mutex mutex; struct ww_acquire_ctx ctx; int ret; - const char *from = trylock ? "trylock" : "lock"; ww_mutex_init(&mutex, &ww_class); ww_acquire_init(&ctx, &ww_class); @@ -133,46 +149,42 @@ static int test_aa(bool trylock) if (!trylock) { ret = ww_mutex_lock(&mutex, &ctx); if (ret) { - pr_err("%s: initial lock failed!\n", __func__); + KUNIT_FAIL(test, "initial lock failed, ret=%d", ret); goto out; } } else { ret = !ww_mutex_trylock(&mutex, &ctx); if (ret) { - pr_err("%s: initial trylock failed!\n", __func__); + KUNIT_FAIL(test, "initial trylock failed, ret=%d", ret); goto out; } } - if (ww_mutex_trylock(&mutex, NULL)) { - pr_err("%s: trylocked itself without context from %s!\n", __func__, from); + ret = ww_mutex_trylock(&mutex, NULL); + if (ret) { + KUNIT_FAIL(test, "trylocked itself without context, ret=%d", ret); ww_mutex_unlock(&mutex); - ret = -EINVAL; goto out; } - if (ww_mutex_trylock(&mutex, &ctx)) { - pr_err("%s: trylocked itself with context from %s!\n", __func__, from); + ret = ww_mutex_trylock(&mutex, &ctx); + if (ret) { + KUNIT_FAIL(test, "trylocked itself with context, ret=%d", ret); ww_mutex_unlock(&mutex); - ret = -EINVAL; goto out; } ret = ww_mutex_lock(&mutex, &ctx); if (ret != -EALREADY) { - pr_err("%s: missed deadlock for recursing, ret=%d from %s\n", - __func__, ret, from); + KUNIT_FAIL(test, "missed deadlock for recursing, ret=%d", ret); if (!ret) ww_mutex_unlock(&mutex); - ret = -EINVAL; goto out; } ww_mutex_unlock(&mutex); - ret = 0; out: ww_acquire_fini(&ctx); - return ret; } struct test_abba { @@ -217,11 +229,28 @@ static void test_abba_work(struct work_struct *work) abba->result = err; } -static int test_abba(bool trylock, bool resolve) +static const void *test_abba_gen_params(const void *prev, char *desc) { + static unsigned int storage; + const unsigned int *next = gen_range(&storage, 0b00, 0b11, prev); + + if (next != NULL) { + const bool trylock = *next & 0b01 >> 0; + const bool resolve = *next & 0b10 >> 1; + + snprintf(desc, KUNIT_PARAM_DESC_SIZE, "trylock=%d,resolve=%d", trylock, resolve); + } + return next; +} + +static void test_abba(struct kunit *test) +{ + const unsigned int *param = test->param_value; + const bool trylock = *param & 0b01 >> 0; + const bool resolve = *param & 0b10 >> 1; struct test_abba abba; struct ww_acquire_ctx ctx; - int err, ret; + int err; ww_mutex_init(&abba.a_mutex, &ww_class); ww_mutex_init(&abba.b_mutex, &ww_class); @@ -259,21 +288,17 @@ static int test_abba(bool trylock, bool resolve) flush_work(&abba.work); destroy_work_on_stack(&abba.work); - ret = 0; if (resolve) { if (err || abba.result) { - pr_err("%s: failed to resolve ABBA deadlock, A err=%d, B err=%d\n", - __func__, err, abba.result); - ret = -EINVAL; + KUNIT_FAIL(test, "failed to resolve ABBA deadlock, A err=%d, B err=%d", + err, abba.result); } } else { if (err != -EDEADLK && abba.result != -EDEADLK) { - pr_err("%s: missed ABBA deadlock, A err=%d, B err=%d\n", - __func__, err, abba.result); - ret = -EINVAL; + KUNIT_FAIL(test, "missed ABBA deadlock, A err=%d, B err=%d", + err, abba.result); } } - return ret; } struct test_cycle { @@ -314,15 +339,25 @@ static void test_cycle_work(struct work_struct *work) cycle->result = err ?: erra; } -static int __test_cycle(unsigned int nthreads) +static const void *test_cycle_gen_params(const void *prev, char *desc) { + static unsigned int storage; + const unsigned int *next = gen_range(&storage, 2, num_online_cpus(), prev); + + if (next != NULL) + snprintf(desc, KUNIT_PARAM_DESC_SIZE, "nthreads=%d", *next); + return next; +} + +static void test_cycle(struct kunit *test) +{ + const unsigned int *param = test->param_value; + const unsigned int nthreads = *param; struct test_cycle *cycles; unsigned int n, last = nthreads - 1; - int ret; - cycles = kmalloc_array(nthreads, sizeof(*cycles), GFP_KERNEL); - if (!cycles) - return -ENOMEM; + cycles = kunit_kmalloc_array(test, nthreads, sizeof(*cycles), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, cycles); for (n = 0; n < nthreads; n++) { struct test_cycle *cycle = &cycles[n]; @@ -348,41 +383,24 @@ static int __test_cycle(unsigned int nthreads) flush_workqueue(wq); - ret = 0; for (n = 0; n < nthreads; n++) { struct test_cycle *cycle = &cycles[n]; if (!cycle->result) continue; - pr_err("cyclic deadlock not resolved, ret[%d/%d] = %d\n", - n, nthreads, cycle->result); - ret = -EINVAL; + KUNIT_FAIL(test, "cyclic deadlock not resolved, ret[%d/%d] = %d", + n, nthreads, cycle->result); break; } for (n = 0; n < nthreads; n++) ww_mutex_destroy(&cycles[n].a_mutex); - kfree(cycles); - return ret; -} - -static int test_cycle(unsigned int ncpus) -{ - unsigned int n; - int ret; - - for (n = 2; n <= ncpus + 1; n++) { - ret = __test_cycle(n); - if (ret) - return ret; - } - - return 0; } struct stress { struct work_struct work; + struct kunit *test; struct ww_mutex *locks; unsigned long timeout; int nlocks; @@ -401,12 +419,12 @@ static inline u32 prandom_u32_below(u32 ceil) return ret; } -static int *get_random_order(int count) +static int *get_random_order(struct kunit *test, int count) { int *order; int n, r; - order = kmalloc_array(count, sizeof(*order), GFP_KERNEL); + order = kunit_kmalloc_array(test, count, sizeof(*order), GFP_KERNEL); if (!order) return order; @@ -435,7 +453,7 @@ static void stress_inorder_work(struct work_struct *work) struct ww_acquire_ctx ctx; int *order; - order = get_random_order(nlocks); + order = get_random_order(stress->test, nlocks); if (!order) return; @@ -472,13 +490,10 @@ static void stress_inorder_work(struct work_struct *work) ww_acquire_fini(&ctx); if (err) { - pr_err_once("stress (%s) failed with %d\n", - __func__, err); + KUNIT_FAIL(stress->test, "lock[%d] failed, err=%d", n, err); break; } } while (!time_after(jiffies, stress->timeout)); - - kfree(order); } struct reorder_lock { @@ -495,19 +510,16 @@ static void stress_reorder_work(struct work_struct *work) int *order; int n, err; - order = get_random_order(stress->nlocks); - if (!order) - return; + order = get_random_order(stress->test, stress->nlocks); + KUNIT_ASSERT_NOT_NULL(stress->test, order); for (n = 0; n < stress->nlocks; n++) { - ll = kmalloc(sizeof(*ll), GFP_KERNEL); - if (!ll) - goto out; + ll = kunit_kmalloc(stress->test, sizeof(*ll), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(stress->test, ll); ll->lock = &stress->locks[order[n]]; list_add(&ll->link, &locks); } - kfree(order); order = NULL; do { @@ -523,8 +535,7 @@ static void stress_reorder_work(struct work_struct *work) ww_mutex_unlock(ln->lock); if (err != -EDEADLK) { - pr_err_once("stress (%s) failed with %d\n", - __func__, err); + KUNIT_FAIL(stress->test, "lock failed, err=%d", err); break; } @@ -538,11 +549,6 @@ static void stress_reorder_work(struct work_struct *work) ww_acquire_fini(&ctx); } while (!time_after(jiffies, stress->timeout)); - -out: - list_for_each_entry_safe(ll, ln, &locks, link) - kfree(ll); - kfree(order); } static void stress_one_work(struct work_struct *work) @@ -558,8 +564,7 @@ static void stress_one_work(struct work_struct *work) dummy_load(stress); ww_mutex_unlock(lock); } else { - pr_err_once("stress (%s) failed with %d\n", - __func__, err); + KUNIT_FAIL(stress->test, "lock failed, err=%d", err); break; } } while (!time_after(jiffies, stress->timeout)); @@ -570,22 +575,41 @@ static void stress_one_work(struct work_struct *work) #define STRESS_ONE BIT(2) #define STRESS_ALL (STRESS_INORDER | STRESS_REORDER | STRESS_ONE) -static int stress(int nlocks, int nthreads, unsigned int flags) +struct stress_case { + int nlocks; + int nthreads_per_cpu; + unsigned int flags; +}; + +static const struct stress_case stress_cases[] = { + { 16, 2, STRESS_INORDER }, + { 16, 2, STRESS_REORDER }, + { 2046, hweight32(STRESS_ALL), STRESS_ALL }, +}; + +static void stress_case_to_desc(const struct stress_case *param, char *desc) { + snprintf(desc, KUNIT_PARAM_DESC_SIZE, "nlocks=%d,nthreads_per_cpu=%d,flags=%x", + param->nlocks, param->nthreads_per_cpu, param->flags); +} + +KUNIT_ARRAY_PARAM(stress_cases, stress_cases, stress_case_to_desc); + +static void stress(struct kunit *test) +{ + const struct stress_case *param = test->param_value; + const int nlocks = param->nlocks; + int nthreads = param->nthreads_per_cpu * num_online_cpus(); + const unsigned int flags = param->flags; struct ww_mutex *locks; struct stress *stress_array; int n, count; - locks = kmalloc_array(nlocks, sizeof(*locks), GFP_KERNEL); - if (!locks) - return -ENOMEM; + locks = kunit_kmalloc_array(test, nlocks, sizeof(*locks), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, locks); - stress_array = kmalloc_array(nthreads, sizeof(*stress_array), - GFP_KERNEL); - if (!stress_array) { - kfree(locks); - return -ENOMEM; - } + stress_array = kunit_kmalloc_array(test, nthreads, sizeof(*stress_array), GFP_KERNEL); + KUNIT_ASSERT_NOT_NULL(test, stress_array); for (n = 0; n < nlocks; n++) ww_mutex_init(&locks[n], &ww_class); @@ -617,6 +641,7 @@ static int stress(int nlocks, int nthreads, unsigned int flags) stress = &stress_array[count++]; INIT_WORK(&stress->work, fn); + stress->test = test; stress->locks = locks; stress->nlocks = nlocks; stress->timeout = jiffies + 2*HZ; @@ -629,70 +654,42 @@ static int stress(int nlocks, int nthreads, unsigned int flags) for (n = 0; n < nlocks; n++) ww_mutex_destroy(&locks[n]); - kfree(stress_array); - kfree(locks); - - return 0; } -static int __init test_ww_mutex_init(void) +static int ww_mutex_suite_init(struct kunit_suite *suite) { - int ncpus = num_online_cpus(); - int ret, i; - - printk(KERN_INFO "Beginning ww mutex selftests\n"); - - prandom_seed_state(&rng, get_random_u64()); - wq = alloc_workqueue("test-ww_mutex", WQ_UNBOUND, 0); if (!wq) return -ENOMEM; - ret = test_mutex(); - if (ret) - return ret; - - ret = test_aa(false); - if (ret) - return ret; - - ret = test_aa(true); - if (ret) - return ret; - - for (i = 0; i < 4; i++) { - ret = test_abba(i & 1, i & 2); - if (ret) - return ret; - } - - ret = test_cycle(ncpus); - if (ret) - return ret; - - ret = stress(16, 2*ncpus, STRESS_INORDER); - if (ret) - return ret; - - ret = stress(16, 2*ncpus, STRESS_REORDER); - if (ret) - return ret; - - ret = stress(2046, hweight32(STRESS_ALL)*ncpus, STRESS_ALL); - if (ret) - return ret; + prandom_seed_state(&rng, get_random_u64()); - printk(KERN_INFO "All ww mutex selftests passed\n"); return 0; } -static void __exit test_ww_mutex_exit(void) +static void ww_mutex_suite_exit(struct kunit_suite *suite) { - destroy_workqueue(wq); + if (wq) + destroy_workqueue(wq); } -module_init(test_ww_mutex_init); -module_exit(test_ww_mutex_exit); +static struct kunit_case ww_mutex_cases[] = { + KUNIT_CASE_PARAM(test_mutex, test_mutex_gen_params), + KUNIT_CASE_PARAM(test_aa, test_aa_gen_params), + KUNIT_CASE_PARAM(test_abba, test_abba_gen_params), + KUNIT_CASE_PARAM(test_cycle, test_cycle_gen_params), + KUNIT_CASE_PARAM_ATTR(stress, stress_cases_gen_params, {.speed = KUNIT_SPEED_SLOW}), + {}, +}; + +static struct kunit_suite ww_mutex_suite = { + .name = "ww_mutex", + .suite_init = ww_mutex_suite_init, + .suite_exit = ww_mutex_suite_exit, + .test_cases = ww_mutex_cases, +}; + +kunit_test_suite(ww_mutex_suite); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Intel Corporation"); diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 1af972a92d06..a7edcbdc1428 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1586,16 +1586,18 @@ config LOCK_TORTURE_TEST Say M if you want these torture tests to build as a module. Say N if you are unsure. -config WW_MUTEX_SELFTEST - tristate "Wait/wound mutex selftests" +config WW_MUTEX_KUNIT_TEST + tristate "KUnit test for wait/wound mutex" if !KUNIT_ALL_TESTS + depends on KUNIT + default KUNIT_ALL_TESTS help - This option provides a kernel module that runs tests on the - on the struct ww_mutex locking API. + This option provides a KUnit test that exercises the struct + ww_mutex locking API. It is recommended to enable DEBUG_WW_MUTEX_SLOWPATH in conjunction with this test harness. - Say M if you want these self tests to build as a module. + Say M if you want these tests to build as a module. Say N if you are unsure. config SCF_TORTURE_TEST diff --git a/tools/testing/selftests/locking/ww_mutex.sh b/tools/testing/selftests/locking/ww_mutex.sh deleted file mode 100755 index 91e4ac7566af..000000000000 --- a/tools/testing/selftests/locking/ww_mutex.sh +++ /dev/null @@ -1,19 +0,0 @@ -#!/bin/sh -# SPDX-License-Identifier: GPL-2.0 - -# Kselftest framework requirement - SKIP code is 4. -ksft_skip=4 - -# Runs API tests for struct ww_mutex (Wait/Wound mutexes) -if ! /sbin/modprobe -q -n test-ww_mutex; then - echo "ww_mutex: module test-ww_mutex is not found [SKIP]" - exit $ksft_skip -fi - -if /sbin/modprobe -q test-ww_mutex; then - /sbin/modprobe -q -r test-ww_mutex - echo "locking/ww_mutex: ok" -else - echo "locking/ww_mutex: [FAIL]" - exit 1 -fi --- base-commit: a64dcfb451e254085a7daee5fe51bf22959d52d3 change-id: 20250208-ww_mutex-kunit-convert-71842a7a6be2 Best regards, -- Tamir Duberstein <tamird(a)gmail.com>

7 months

4
6
0 0

[PATCH net-next v7 3/3] selftests: drv-net: Test queue xsk attribute

by Joe Damato

Test that queues which are used for AF_XDP have the xsk nest attribute. The attribute is currently empty, but its existence means the AF_XDP is being used for the queue. Enable CONFIG_XDP_SOCKETS for selftests/drivers/net tests, as well. Signed-off-by: Joe Damato <jdamato(a)fastly.com> Suggested-by: Jakub Kicinski <kuba(a)kernel.org> --- v7: - Added CONFIG_XDP_SOCKETS=y to selftests/drivers/net/config. - Updated xdp_helper to return -1 on AF_XDP non-existence, 1 for other failures. - Updated queues.py to skip if AF_XDP does not not exist, fail otherwise. v3: - Change comment style of helper C program to avoid kdoc warnings as suggested by Jakub. No other changes. v2: - Updated the Python test after changes to patch 1 which expose an empty nest - Updated Python test with general Python coding feedback .../testing/selftests/drivers/net/.gitignore | 2 + tools/testing/selftests/drivers/net/Makefile | 3 + tools/testing/selftests/drivers/net/config | 1 + tools/testing/selftests/drivers/net/queues.py | 42 +++++++- .../selftests/drivers/net/xdp_helper.c | 98 +++++++++++++++++++ 5 files changed, 143 insertions(+), 3 deletions(-) create mode 100644 tools/testing/selftests/drivers/net/.gitignore create mode 100644 tools/testing/selftests/drivers/net/xdp_helper.c diff --git a/tools/testing/selftests/drivers/net/.gitignore b/tools/testing/selftests/drivers/net/.gitignore new file mode 100644 index 000000000000..ec746f374e85 --- /dev/null +++ b/tools/testing/selftests/drivers/net/.gitignore @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +xdp_helper diff --git a/tools/testing/selftests/drivers/net/Makefile b/tools/testing/selftests/drivers/net/Makefile index 28b6d47f812d..68127c449c24 100644 --- a/tools/testing/selftests/drivers/net/Makefile +++ b/tools/testing/selftests/drivers/net/Makefile @@ -1,10 +1,13 @@ # SPDX-License-Identifier: GPL-2.0 +CFLAGS += $(KHDR_INCLUDES) TEST_INCLUDES := $(wildcard lib/py/*.py) \ $(wildcard lib/sh/*.sh) \ ../../net/net_helper.sh \ ../../net/lib.sh \ +TEST_GEN_PROGS := xdp_helper + TEST_PROGS := \ netcons_basic.sh \ netcons_fragmented_msg.sh \ diff --git a/tools/testing/selftests/drivers/net/config b/tools/testing/selftests/drivers/net/config index a2d8af60876d..f27172ddee0a 100644 --- a/tools/testing/selftests/drivers/net/config +++ b/tools/testing/selftests/drivers/net/config @@ -4,3 +4,4 @@ CONFIG_CONFIGFS_FS=y CONFIG_NETCONSOLE=m CONFIG_NETCONSOLE_DYNAMIC=y CONFIG_NETCONSOLE_EXTENDED_LOG=y +CONFIG_XDP_SOCKETS=y diff --git a/tools/testing/selftests/drivers/net/queues.py b/tools/testing/selftests/drivers/net/queues.py index 38303da957ee..5fdfebc6415f 100755 --- a/tools/testing/selftests/drivers/net/queues.py +++ b/tools/testing/selftests/drivers/net/queues.py @@ -2,13 +2,16 @@ # SPDX-License-Identifier: GPL-2.0 from lib.py import ksft_disruptive, ksft_exit, ksft_run -from lib.py import ksft_eq, ksft_raises, KsftSkipEx +from lib.py import ksft_eq, ksft_raises, KsftSkipEx, KsftFailEx from lib.py import EthtoolFamily, NetdevFamily, NlError from lib.py import NetDrvEnv from lib.py import cmd, defer, ip import errno import glob - +import os +import socket +import struct +import subprocess def sys_get_queues(ifname, qtype='rx') -> int: folders = glob.glob(f'/sys/class/net/{ifname}/queues/{qtype}-*') @@ -21,6 +24,39 @@ def nl_get_queues(cfg, nl, qtype='rx'): return len([q for q in queues if q['type'] == qtype]) return None +def check_xdp(cfg, nl, xdp_queue_id=0) -> None: + test_dir = os.path.dirname(os.path.realpath(__file__)) + xdp = subprocess.Popen([f"{test_dir}/xdp_helper", f"{cfg.ifindex}", f"{xdp_queue_id}"], + stdin=subprocess.PIPE, stdout=subprocess.PIPE, bufsize=1, + text=True) + defer(xdp.kill) + + stdout, stderr = xdp.communicate(timeout=10) + rx = tx = False + + if xdp.returncode == 255: + raise KsftSkipEx('AF_XDP unsupported') + elif xdp.returncode > 0: + raise KsftFailEx('unable to create AF_XDP socket') + + queues = nl.queue_get({'ifindex': cfg.ifindex}, dump=True) + if not queues: + raise KsftSkipEx("Netlink reports no queues") + + for q in queues: + if q['id'] == 0: + if q['type'] == 'rx': + rx = True + if q['type'] == 'tx': + tx = True + + ksft_eq(q['xsk'], {}) + else: + if 'xsk' in q: + _fail("Check failed: xsk attribute set.") + + ksft_eq(rx, True) + ksft_eq(tx, True) def get_queues(cfg, nl) -> None: snl = NetdevFamily(recv_size=4096) @@ -81,7 +117,7 @@ def check_down(cfg, nl) -> None: def main() -> None: with NetDrvEnv(__file__, queue_count=100) as cfg: - ksft_run([get_queues, addremove_queues, check_down], args=(cfg, NetdevFamily())) + ksft_run([get_queues, addremove_queues, check_down, check_xdp], args=(cfg, NetdevFamily())) ksft_exit() diff --git a/tools/testing/selftests/drivers/net/xdp_helper.c b/tools/testing/selftests/drivers/net/xdp_helper.c new file mode 100644 index 000000000000..2a40cc35d800 --- /dev/null +++ b/tools/testing/selftests/drivers/net/xdp_helper.c @@ -0,0 +1,98 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/mman.h> +#include <sys/socket.h> +#include <linux/if_xdp.h> +#include <linux/if_link.h> +#include <net/if.h> +#include <inttypes.h> + +#define UMEM_SZ (1U << 16) +#define NUM_DESC (UMEM_SZ / 2048) + +/* this is a simple helper program that creates an XDP socket and does the + * minimum necessary to get bind() to succeed. + * + * this test program is not intended to actually process packets, but could be + * extended in the future if that is actually needed. + * + * it is used by queues.py to ensure the xsk netlinux attribute is set + * correctly. + */ +int main(int argc, char **argv) +{ + struct xdp_umem_reg umem_reg = { 0 }; + struct sockaddr_xdp sxdp = { 0 }; + int num_desc = NUM_DESC; + void *umem_area; + int ifindex; + int sock_fd; + int queue; + char byte; + + if (argc != 3) { + fprintf(stderr, "Usage: %s ifindex queue_id", argv[0]); + return 1; + } + + sock_fd = socket(AF_XDP, SOCK_RAW, 0); + if (sock_fd < 0) { + perror("socket creation failed"); + /* if the kernel doesnt support AF_XDP, let the test program + * know with -1. All other error paths return 1. + */ + if (errno == EAFNOSUPPORT) + return -1; + return 1; + } + + ifindex = atoi(argv[1]); + queue = atoi(argv[2]); + + umem_area = mmap(NULL, UMEM_SZ, PROT_READ | PROT_WRITE, MAP_PRIVATE | + MAP_ANONYMOUS, -1, 0); + if (umem_area == MAP_FAILED) { + perror("mmap failed"); + return 1; + } + + umem_reg.addr = (uintptr_t)umem_area; + umem_reg.len = UMEM_SZ; + umem_reg.chunk_size = 2048; + umem_reg.headroom = 0; + + setsockopt(sock_fd, SOL_XDP, XDP_UMEM_REG, &umem_reg, + sizeof(umem_reg)); + setsockopt(sock_fd, SOL_XDP, XDP_UMEM_FILL_RING, &num_desc, + sizeof(num_desc)); + setsockopt(sock_fd, SOL_XDP, XDP_UMEM_COMPLETION_RING, &num_desc, + sizeof(num_desc)); + setsockopt(sock_fd, SOL_XDP, XDP_RX_RING, &num_desc, sizeof(num_desc)); + + sxdp.sxdp_family = AF_XDP; + sxdp.sxdp_ifindex = ifindex; + sxdp.sxdp_queue_id = queue; + sxdp.sxdp_flags = 0; + + if (bind(sock_fd, (struct sockaddr *)&sxdp, sizeof(sxdp)) != 0) { + munmap(umem_area, UMEM_SZ); + perror("bind failed"); + close(sock_fd); + return 1; + } + + /* give the parent program some data when the socket is ready*/ + fprintf(stdout, "%d\n", sock_fd); + + /* parent program will write a byte to stdin when its ready for this + * helper to exit + */ + read(STDIN_FILENO, &byte, 1); + + close(sock_fd); + return 0; +} -- 2.43.0

7 months

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[PATCH net-next v7 0/3] netdev-genl: Add an xsk attribute to queues

by Joe Damato

Greetings: Welcome to v7. Added CONFIG_XDP_SOCKETS to the selftests/driver/net kernel config in patch 3. Updated the xdp_helper.c to return -1 on AF_XDP non-existence, and updated queues.py to skip the test if AF_XDP does not exist (but fail in other failure cases). Tested on kernels with and without CONFIG_XDP_SOCKETS enabled. This is an attempt to followup on something Jakub asked me about [1], adding an xsk attribute to queues and more clearly documenting which queues are linked to NAPIs... After the RFC [2], Jakub suggested creating an empty nest for queues which have a pool, so I've adjusted this version to work that way. The nest can be extended in the future to express attributes about XSK as needed. Queues which are not used for AF_XDP do not have the xsk attribute present. I've run the included test on: - my mlx5 machine (via NETIF=) - without setting NETIF And the test seems to pass in both cases. Thanks, Joe [1]: https://lore.kernel.org/netdev/20250113143109.60afa59a@kernel.org/ [2]: https://lore.kernel.org/netdev/20250129172431.65773-1-jdamato@fastly.com/ v7: - Added CONFIG_XDP_SOCKETS to selftests/driver/net/config as suggested by Stanislav. - Updated xdp_helper.c to return -1 for AF_XDP non-existence, but 1 for other failures. - Updated queues.py to mark test as skipped if AF_XDP does not exist. v6: https://lore.kernel.org/bpf/20250210193903.16235-1-jdamato@fastly.com/ - Added ifdefs for CONFIG_XDP_SOCKETS in patch 2 as Stanislav suggested. v5: https://lore.kernel.org/bpf/20250208041248.111118-1-jdamato@fastly.com/ - Removed unused ret variable from patch 2 as Simon suggested. v4: https://lore.kernel.org/lkml/20250207030916.32751-1-jdamato@fastly.com/ - Add patch 1, as suggested by Jakub, which adds an empty nest helper. - Use the helper in patch 2, which makes the code cleaner and prevents a possible bug. v3: https://lore.kernel.org/netdev/20250204191108.161046-1-jdamato@fastly.com/ - Change comment format in patch 2 to avoid kdoc warnings. No other changes. v2: https://lore.kernel.org/all/20250203185828.19334-1-jdamato@fastly.com/ - Switched from RFC to actual submission now that net-next is open - Adjusted patch 1 to include an empty nest as suggested by Jakub - Adjusted patch 2 to update the test based on changes to patch 1, and to incorporate some Python feedback from Jakub :) rfc: https://lore.kernel.org/netdev/20250129172431.65773-1-jdamato@fastly.com/ Joe Damato (3): netlink: Add nla_put_empty_nest helper netdev-genl: Add an XSK attribute to queues selftests: drv-net: Test queue xsk attribute Documentation/netlink/specs/netdev.yaml | 13 ++- include/net/netlink.h | 15 +++ include/uapi/linux/netdev.h | 6 ++ net/core/netdev-genl.c | 12 +++ tools/include/uapi/linux/netdev.h | 6 ++ .../testing/selftests/drivers/net/.gitignore | 2 + tools/testing/selftests/drivers/net/Makefile | 3 + tools/testing/selftests/drivers/net/config | 1 + tools/testing/selftests/drivers/net/queues.py | 42 +++++++- .../selftests/drivers/net/xdp_helper.c | 98 +++++++++++++++++++ 10 files changed, 194 insertions(+), 4 deletions(-) create mode 100644 tools/testing/selftests/drivers/net/.gitignore create mode 100644 tools/testing/selftests/drivers/net/xdp_helper.c base-commit: 4e41231249f4083a095085ff86e317e29313c2c3 -- 2.43.0

7 months

1
0
0 0

[PATCH net-next v6 0/3] netdev-genl: Add an xsk attribute to queues

by Joe Damato

Greetings Welcome to v6. Added ifdefs to patch 2 and built with CONFIG_XDP_SOCKETS both enabled and disabled to confirm it builds cleanly. No other changes. This is an attempt to followup on something Jakub asked me about [1], adding an xsk attribute to queues and more clearly documenting which queues are linked to NAPIs... After the RFC [2], Jakub suggested creating an empty nest for queues which have a pool, so I've adjusted this version to work that way. The nest can be extended in the future to express attributes about XSK as needed. Queues which are not used for AF_XDP do not have the xsk attribute present. I've run the included test on: - my mlx5 machine (via NETIF=) - without setting NETIF And the test seems to pass in both cases. Thanks, Joe [1]: https://lore.kernel.org/netdev/20250113143109.60afa59a@kernel.org/ [2]: https://lore.kernel.org/netdev/20250129172431.65773-1-jdamato@fastly.com/ v6: - Added ifdefs for CONFIG_XDP_SOCKETS in patch 2 as Stanislav suggested. v5: https://lore.kernel.org/bpf/20250208041248.111118-1-jdamato@fastly.com/ - Removed unused ret variable from patch 2 as Simon suggested. v4: https://lore.kernel.org/lkml/20250207030916.32751-1-jdamato@fastly.com/ - Add patch 1, as suggested by Jakub, which adds an empty nest helper. - Use the helper in patch 2, which makes the code cleaner and prevents a possible bug. v3: https://lore.kernel.org/netdev/20250204191108.161046-1-jdamato@fastly.com/ - Change comment format in patch 2 to avoid kdoc warnings. No other changes. v2: https://lore.kernel.org/all/20250203185828.19334-1-jdamato@fastly.com/ - Switched from RFC to actual submission now that net-next is open - Adjusted patch 1 to include an empty nest as suggested by Jakub - Adjusted patch 2 to update the test based on changes to patch 1, and to incorporate some Python feedback from Jakub :) rfc: https://lore.kernel.org/netdev/20250129172431.65773-1-jdamato@fastly.com/ Joe Damato (3): netlink: Add nla_put_empty_nest helper netdev-genl: Add an XSK attribute to queues selftests: drv-net: Test queue xsk attribute Documentation/netlink/specs/netdev.yaml | 13 ++- include/net/netlink.h | 15 ++++ include/uapi/linux/netdev.h | 6 ++ net/core/netdev-genl.c | 12 +++ tools/include/uapi/linux/netdev.h | 6 ++ .../testing/selftests/drivers/net/.gitignore | 2 + tools/testing/selftests/drivers/net/Makefile | 3 + tools/testing/selftests/drivers/net/queues.py | 35 +++++++- .../selftests/drivers/net/xdp_helper.c | 89 +++++++++++++++++++ 9 files changed, 178 insertions(+), 3 deletions(-) create mode 100644 tools/testing/selftests/drivers/net/.gitignore create mode 100644 tools/testing/selftests/drivers/net/xdp_helper.c base-commit: 39f54262ba499d862420a97719d2f0eea0cbd394 -- 2.43.0

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