February 2025 - Linux-kselftest-mirror

[RFC PATCH 0/9] bpf: Mitigate Spectre v1 using speculation barriers

by Luis Gerhorst

This improves the expressiveness of unprivileged BPF by inserting speculation barriers instead of rejcting the programs. The approach was presented at LPC'24: https://lpc.events/event/18/contributions/1954/ ("Mitigating Spectre-PHT using Speculation Barriers in Linux eBPF") and RAID'24: https://arxiv.org/pdf/2405.00078 ("VeriFence: Lightweight and Precise Spectre Defenses for Untrusted Linux Kernel Extensions") Goal of this RFC is to get feedback on the approach and the structuring into commits. TODOs to be fixed for final version: * actually emit arm64 barrier * fix unexpected_load_success from test_progs for "bpf: Fall back to nospec for sanitization-failures" * use bpf-next as base commit Luis Gerhorst (9): bpf/arm64: Unset bypass_spec_v4() instead of ignoring BPF_NOSPEC bpf: Refactor do_check() if/else into do_check_insn() bpf: Return EFAULT on misconfigurations bpf: Return EFAULT on internal errors bpf: Fall back to nospec if v1 verification fails bpf: Allow nospec-protected var-offset stack access bpf: Refactor push_stack to return error code bpf: Fall back to nospec for sanitization-failures bpf: Cut speculative path verification short arch/arm64/net/bpf_jit_comp.c | 10 +- include/linux/bpf.h | 14 +- include/linux/bpf_verifier.h | 3 +- kernel/bpf/core.c | 17 +- kernel/bpf/verifier.c | 832 ++++++++++-------- .../selftests/bpf/progs/verifier_and.c | 3 +- .../selftests/bpf/progs/verifier_bounds.c | 30 +- .../selftests/bpf/progs/verifier_movsx.c | 6 +- .../selftests/bpf/progs/verifier_unpriv.c | 3 +- .../bpf/progs/verifier_value_ptr_arith.c | 11 +- 10 files changed, 520 insertions(+), 409 deletions(-) base-commit: d082ecbc71e9e0bf49883ee4afd435a77a5101b6 -- 2.48.1

1 month, 3 weeks

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[PATCH] KVM: selftests: access_tracking_perf_test: add option to skip the sanity check

by Maxim Levitsky

Add an option to skip sanity check of number of still idle pages, and force it on, in case hypervisor or NUMA balancing is detected. Signed-off-by: Maxim Levitsky <mlevitsk(a)redhat.com> --- .../selftests/kvm/access_tracking_perf_test.c | 23 +++++++++++++++++-- .../testing/selftests/kvm/include/test_util.h | 1 + tools/testing/selftests/kvm/lib/test_util.c | 22 ++++++++++++++++++ 3 files changed, 44 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/kvm/access_tracking_perf_test.c b/tools/testing/selftests/kvm/access_tracking_perf_test.c index 3c7defd34f56..eafaecf086c4 100644 --- a/tools/testing/selftests/kvm/access_tracking_perf_test.c +++ b/tools/testing/selftests/kvm/access_tracking_perf_test.c @@ -65,6 +65,8 @@ static int vcpu_last_completed_iteration[KVM_MAX_VCPUS]; /* Whether to overlap the regions of memory vCPUs access. */ static bool overlap_memory_access; +static bool skip_sanity_check; + struct test_params { /* The backing source for the region of memory. */ enum vm_mem_backing_src_type backing_src; @@ -185,7 +187,7 @@ static void mark_vcpu_memory_idle(struct kvm_vm *vm, */ if (still_idle >= pages / 10) { #ifdef __x86_64__ - TEST_ASSERT(this_cpu_has(X86_FEATURE_HYPERVISOR), + TEST_ASSERT(skip_sanity_check, "vCPU%d: Too many pages still idle (%lu out of %lu)", vcpu_idx, still_idle, pages); #endif @@ -342,6 +344,8 @@ static void help(char *name) printf(" -v: specify the number of vCPUs to run.\n"); printf(" -o: Overlap guest memory accesses instead of partitioning\n" " them into a separate region of memory for each vCPU.\n"); + printf(" -u: Skip check that after dirtying the guest memory, most (90%%) of\n" + "it is reported as dirty again"); backing_src_help("-s"); puts(""); exit(0); @@ -359,7 +363,7 @@ int main(int argc, char *argv[]) guest_modes_append_default(); - while ((opt = getopt(argc, argv, "hm:b:v:os:")) != -1) { + while ((opt = getopt(argc, argv, "hm:b:v:os:u")) != -1) { switch (opt) { case 'm': guest_modes_cmdline(optarg); @@ -376,6 +380,9 @@ int main(int argc, char *argv[]) case 's': params.backing_src = parse_backing_src_type(optarg); break; + case 'u': + skip_sanity_check = true; + break; case 'h': default: help(argv[0]); @@ -386,6 +393,18 @@ int main(int argc, char *argv[]) page_idle_fd = open("/sys/kernel/mm/page_idle/bitmap", O_RDWR); __TEST_REQUIRE(page_idle_fd >= 0, "CONFIG_IDLE_PAGE_TRACKING is not enabled"); + + + if (skip_sanity_check == false) { + if (this_cpu_has(X86_FEATURE_HYPERVISOR)) { + printf("Skipping idle page count sanity check, because the test is run nested\n"); + skip_sanity_check = true; + } else if (is_numa_balancing_enabled()) { + printf("Skipping idle page count sanity check, because NUMA balance is enabled\n"); + skip_sanity_check = true; + } + } + close(page_idle_fd); for_each_guest_mode(run_test, &params); diff --git a/tools/testing/selftests/kvm/include/test_util.h b/tools/testing/selftests/kvm/include/test_util.h index 3e473058849f..1bc9b0a92427 100644 --- a/tools/testing/selftests/kvm/include/test_util.h +++ b/tools/testing/selftests/kvm/include/test_util.h @@ -153,6 +153,7 @@ bool is_backing_src_hugetlb(uint32_t i); void backing_src_help(const char *flag); enum vm_mem_backing_src_type parse_backing_src_type(const char *type_name); long get_run_delay(void); +bool is_numa_balancing_enabled(void); /* * Whether or not the given source type is shared memory (as opposed to diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c index 8ed0b74ae837..1271863613fa 100644 --- a/tools/testing/selftests/kvm/lib/test_util.c +++ b/tools/testing/selftests/kvm/lib/test_util.c @@ -163,6 +163,28 @@ size_t get_trans_hugepagesz(void) return size; } + +bool is_numa_balancing_enabled(void) +{ + int ret; + int val; + struct stat statbuf; + FILE *f; + + ret = stat("/proc/sys/kernel/numa_balancing", &statbuf); + TEST_ASSERT(ret == 0 || (ret == -1 && errno == ENOENT), + "Error in stating /proc/sys/kernel/numa_balancing"); + + if (ret != 0) + return false; + + f = fopen("/proc/sys/kernel/numa_balancing", "r"); + ret = fscanf(f, "%d", &val); + + TEST_ASSERT(val == 0 || val == 1, "Unexpected value in /proc/sys/kernel/numa_balancing"); + return val == 1; +} + size_t get_def_hugetlb_pagesz(void) { char buf[64]; -- 2.26.3

1 month, 3 weeks

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[PATCH net v2] selftests: drv-net: Check if combined-count exists

by Joe Damato

Some drivers, like tg3, do not set combined-count: $ ethtool -l enp4s0f1 Channel parameters for enp4s0f1: Pre-set maximums: RX: 4 TX: 4 Other: n/a Combined: n/a Current hardware settings: RX: 4 TX: 1 Other: n/a Combined: n/a In the case where combined-count is not set, the ethtool netlink code in the kernel elides the value and the code in the test: netnl.channels_get(...) With a tg3 device, the returned dictionary looks like: {'header': {'dev-index': 3, 'dev-name': 'enp4s0f1'}, 'rx-max': 4, 'rx-count': 4, 'tx-max': 4, 'tx-count': 1} Note that the key 'combined-count' is missing. As a result of this missing key the test raises an exception: # Exception| if channels['combined-count'] == 0: # Exception| ~~~~~~~~^^^^^^^^^^^^^^^^^^ # Exception| KeyError: 'combined-count' Change the test to check if 'combined-count' is a key in the dictionary first and if not assume that this means the driver has separate RX and TX queues. With this change, the test now passes successfully on tg3 and mlx5 (which does have a 'combined-count'). Fixes: 1cf270424218 ("net: selftest: add test for netdev netlink queue-get API") Signed-off-by: Joe Damato <jdamato(a)fastly.com> --- v2: - Simplify logic and reduce indentation as suggested by David Wei. Retested on both tg3 and mlx5 and test passes as expected. v1: https://lore.kernel.org/lkml/20250225181455.224309-1-jdamato@fastly.com/ tools/testing/selftests/drivers/net/queues.py | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/drivers/net/queues.py b/tools/testing/selftests/drivers/net/queues.py index 38303da957ee..8a518905a9f9 100755 --- a/tools/testing/selftests/drivers/net/queues.py +++ b/tools/testing/selftests/drivers/net/queues.py @@ -45,10 +45,9 @@ def addremove_queues(cfg, nl) -> None: netnl = EthtoolFamily() channels = netnl.channels_get({'header': {'dev-index': cfg.ifindex}}) - if channels['combined-count'] == 0: - rx_type = 'rx' - else: - rx_type = 'combined' + rx_type = 'rx' + if channels.get('combined-count', 0) > 0: + rx_type = 'combined' expected = curr_queues - 1 cmd(f"ethtool -L {cfg.dev['ifname']} {rx_type} {expected}", timeout=10) base-commit: 8d52da23b6c68a0f6bad83959ebb61a2cf623c4e -- 2.43.0

1 month, 3 weeks

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[PATCH v11 3/3] selftests/rseq: Add test for mm_cid compaction

by Gabriele Monaco

A task in the kernel (task_mm_cid_work) runs somewhat periodically to compact the mm_cid for each process. Add a test to validate that it runs correctly and timely. The test spawns 1 thread pinned to each CPU, then each thread, including the main one, runs in short bursts for some time. During this period, the mm_cids should be spanning all numbers between 0 and nproc. At the end of this phase, a thread with high enough mm_cid (>= nproc/2) is selected to be the new leader, all other threads terminate. After some time, the only running thread should see 0 as mm_cid, if that doesn't happen, the compaction mechanism didn't work and the test fails. The test never fails if only 1 core is available, in which case, we cannot test anything as the only available mm_cid is 0. Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com> Signed-off-by: Gabriele Monaco <gmonaco(a)redhat.com> --- tools/testing/selftests/rseq/.gitignore | 1 + tools/testing/selftests/rseq/Makefile | 2 +- .../selftests/rseq/mm_cid_compaction_test.c | 200 ++++++++++++++++++ 3 files changed, 202 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/rseq/mm_cid_compaction_test.c diff --git a/tools/testing/selftests/rseq/.gitignore b/tools/testing/selftests/rseq/.gitignore index 16496de5f6ce4..2c89f97e4f737 100644 --- a/tools/testing/selftests/rseq/.gitignore +++ b/tools/testing/selftests/rseq/.gitignore @@ -3,6 +3,7 @@ basic_percpu_ops_test basic_percpu_ops_mm_cid_test basic_test basic_rseq_op_test +mm_cid_compaction_test param_test param_test_benchmark param_test_compare_twice diff --git a/tools/testing/selftests/rseq/Makefile b/tools/testing/selftests/rseq/Makefile index 5a3432fceb586..ce1b38f46a355 100644 --- a/tools/testing/selftests/rseq/Makefile +++ b/tools/testing/selftests/rseq/Makefile @@ -16,7 +16,7 @@ OVERRIDE_TARGETS = 1 TEST_GEN_PROGS = basic_test basic_percpu_ops_test basic_percpu_ops_mm_cid_test param_test \ param_test_benchmark param_test_compare_twice param_test_mm_cid \ - param_test_mm_cid_benchmark param_test_mm_cid_compare_twice + param_test_mm_cid_benchmark param_test_mm_cid_compare_twice mm_cid_compaction_test TEST_GEN_PROGS_EXTENDED = librseq.so diff --git a/tools/testing/selftests/rseq/mm_cid_compaction_test.c b/tools/testing/selftests/rseq/mm_cid_compaction_test.c new file mode 100644 index 0000000000000..7ddde3b657dd6 --- /dev/null +++ b/tools/testing/selftests/rseq/mm_cid_compaction_test.c @@ -0,0 +1,200 @@ +// SPDX-License-Identifier: LGPL-2.1 +#define _GNU_SOURCE +#include <assert.h> +#include <pthread.h> +#include <sched.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <stddef.h> + +#include "../kselftest.h" +#include "rseq.h" + +#define VERBOSE 0 +#define printf_verbose(fmt, ...) \ + do { \ + if (VERBOSE) \ + printf(fmt, ##__VA_ARGS__); \ + } while (0) + +/* 0.5 s */ +#define RUNNER_PERIOD 500000 +/* Number of runs before we terminate or get the token */ +#define THREAD_RUNS 5 + +/* + * Number of times we check that the mm_cid were compacted. + * Checks are repeated every RUNNER_PERIOD. + */ +#define MM_CID_COMPACT_TIMEOUT 10 + +struct thread_args { + int cpu; + int num_cpus; + pthread_mutex_t *token; + pthread_barrier_t *barrier; + pthread_t *tinfo; + struct thread_args *args_head; +}; + +static void __noreturn *thread_runner(void *arg) +{ + struct thread_args *args = arg; + int i, ret, curr_mm_cid; + cpu_set_t cpumask; + + CPU_ZERO(&cpumask); + CPU_SET(args->cpu, &cpumask); + ret = pthread_setaffinity_np(pthread_self(), sizeof(cpumask), &cpumask); + if (ret) { + errno = ret; + perror("Error: failed to set affinity"); + abort(); + } + pthread_barrier_wait(args->barrier); + + for (i = 0; i < THREAD_RUNS; i++) + usleep(RUNNER_PERIOD); + curr_mm_cid = rseq_current_mm_cid(); + /* + * We select one thread with high enough mm_cid to be the new leader. + * All other threads (including the main thread) will terminate. + * After some time, the mm_cid of the only remaining thread should + * converge to 0, if not, the test fails. + */ + if (curr_mm_cid >= args->num_cpus / 2 && + !pthread_mutex_trylock(args->token)) { + printf_verbose( + "cpu%d has mm_cid=%d and will be the new leader.\n", + sched_getcpu(), curr_mm_cid); + for (i = 0; i < args->num_cpus; i++) { + if (args->tinfo[i] == pthread_self()) + continue; + ret = pthread_join(args->tinfo[i], NULL); + if (ret) { + errno = ret; + perror("Error: failed to join thread"); + abort(); + } + } + pthread_barrier_destroy(args->barrier); + free(args->tinfo); + free(args->token); + free(args->barrier); + free(args->args_head); + + for (i = 0; i < MM_CID_COMPACT_TIMEOUT; i++) { + curr_mm_cid = rseq_current_mm_cid(); + printf_verbose("run %d: mm_cid=%d on cpu%d.\n", i, + curr_mm_cid, sched_getcpu()); + if (curr_mm_cid == 0) + exit(EXIT_SUCCESS); + usleep(RUNNER_PERIOD); + } + exit(EXIT_FAILURE); + } + printf_verbose("cpu%d has mm_cid=%d and is going to terminate.\n", + sched_getcpu(), curr_mm_cid); + pthread_exit(NULL); +} + +int test_mm_cid_compaction(void) +{ + cpu_set_t affinity; + int i, j, ret = 0, num_threads; + pthread_t *tinfo; + pthread_mutex_t *token; + pthread_barrier_t *barrier; + struct thread_args *args; + + sched_getaffinity(0, sizeof(affinity), &affinity); + num_threads = CPU_COUNT(&affinity); + tinfo = calloc(num_threads, sizeof(*tinfo)); + if (!tinfo) { + perror("Error: failed to allocate tinfo"); + return -1; + } + args = calloc(num_threads, sizeof(*args)); + if (!args) { + perror("Error: failed to allocate args"); + ret = -1; + goto out_free_tinfo; + } + token = malloc(sizeof(*token)); + if (!token) { + perror("Error: failed to allocate token"); + ret = -1; + goto out_free_args; + } + barrier = malloc(sizeof(*barrier)); + if (!barrier) { + perror("Error: failed to allocate barrier"); + ret = -1; + goto out_free_token; + } + if (num_threads == 1) { + fprintf(stderr, "Cannot test on a single cpu. " + "Skipping mm_cid_compaction test.\n"); + /* only skipping the test, this is not a failure */ + goto out_free_barrier; + } + pthread_mutex_init(token, NULL); + ret = pthread_barrier_init(barrier, NULL, num_threads); + if (ret) { + errno = ret; + perror("Error: failed to initialise barrier"); + goto out_free_barrier; + } + for (i = 0, j = 0; i < CPU_SETSIZE && j < num_threads; i++) { + if (!CPU_ISSET(i, &affinity)) + continue; + args[j].num_cpus = num_threads; + args[j].tinfo = tinfo; + args[j].token = token; + args[j].barrier = barrier; + args[j].cpu = i; + args[j].args_head = args; + if (!j) { + /* The first thread is the main one */ + tinfo[0] = pthread_self(); + ++j; + continue; + } + ret = pthread_create(&tinfo[j], NULL, thread_runner, &args[j]); + if (ret) { + errno = ret; + perror("Error: failed to create thread"); + abort(); + } + ++j; + } + printf_verbose("Started %d threads.\n", num_threads); + + /* Also main thread will terminate if it is not selected as leader */ + thread_runner(&args[0]); + + /* only reached in case of errors */ +out_free_barrier: + free(barrier); +out_free_token: + free(token); +out_free_args: + free(args); +out_free_tinfo: + free(tinfo); + + return ret; +} + +int main(int argc, char **argv) +{ + if (!rseq_mm_cid_available()) { + fprintf(stderr, "Error: rseq_mm_cid unavailable\n"); + return -1; + } + if (test_mm_cid_compaction()) + return -1; + return 0; +} -- 2.48.1

1 month, 3 weeks

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[PATCH net-next v7 0/8] Some pktgen fixes/improvments (part II)

by Peter Seiderer

While taking a look at '[PATCH net] pktgen: Avoid out-of-range in get_imix_entries' ([1]) and '[PATCH net v2] pktgen: Avoid out-of-bounds access in get_imix_entries' ([2], [3]) and doing some tests and code review I detected that the /proc/net/pktgen/... parsing logic does not honour the user given buffer bounds (resulting in out-of-bounds access). This can be observed e.g. by the following simple test (sometimes the old/'longer' previous value is re-read from the buffer): $ echo add_device lo@0 > /proc/net/pktgen/kpktgend_0 $ echo "min_pkt_size 12345" > /proc/net/pktgen/lo\@0 && grep min_pkt_size /proc/net/pktgen/lo\@0 Params: count 1000 min_pkt_size: 12345 max_pkt_size: 0 Result: OK: min_pkt_size=12345 $ echo -n "min_pkt_size 123" > /proc/net/pktgen/lo\@0 && grep min_pkt_size /proc/net/pktgen/lo\@0 Params: count 1000 min_pkt_size: 12345 max_pkt_size: 0 Result: OK: min_pkt_size=12345 $ echo "min_pkt_size 123" > /proc/net/pktgen/lo\@0 && grep min_pkt_size /proc/net/pktgen/lo\@0 Params: count 1000 min_pkt_size: 123 max_pkt_size: 0 Result: OK: min_pkt_size=123 So fix the out-of-bounds access (and some minor findings) and add a simple proc_net_pktgen selftest... Patch set splited into part I (now already applied to net-next) - net: pktgen: replace ENOTSUPP with EOPNOTSUPP - net: pktgen: enable 'param=value' parsing - net: pktgen: fix hex32_arg parsing for short reads - net: pktgen: fix 'rate 0' error handling (return -EINVAL) - net: pktgen: fix 'ratep 0' error handling (return -EINVAL) - net: pktgen: fix ctrl interface command parsing - net: pktgen: fix access outside of user given buffer in pktgen_thread_write() And part II (this one): - net: pktgen: use defines for the various dec/hex number parsing digits lengths - net: pktgen: fix mix of int/long - net: pktgen: remove extra tmp variable (re-use len instead) - net: pktgen: remove some superfluous variable initializing - net: pktgen: fix mpls maximum labels list parsing - net: pktgen: fix access outside of user given buffer in pktgen_if_write() - net: pktgen: fix mpls reset parsing - net: pktgen: remove all superfluous index assignements - selftest: net: add proc_net_pktgen Regards, Peter Changes v6 -> v7: - rebased on actual net-next/main - selftest: net: add proc_net_pktgen - fixed conflict in tools/testing/selftests/net/config Changes v5 -> v6: - add rev-by Simon Horman - drop patch 'net: pktgen: use defines for the various dec/hex number parsing digits lengths' - adjust to dropped patch ''net: pktgen: use defines for the various dec/hex number parsing digits lengths' - net: pktgen: fix mix of int/long - fix line break (suggested by Simon Horman) Changes v4 -> v5: - split up patchset into part i/ii (suggested by Simon Horman) - add rev-by Simon Horman - net: pktgen: align some variable declarations to the most common pattern -> net: pktgen: fix mix of int/long - instead of align to most common pattern (int) adjust all usages to size_t for i and max and ssize_t for len and adjust function signatures of hex32_arg(), count_trail_chars(), num_arg() and strn_len() accordingly - respect reverse xmas tree order for local variable declarations (where possible without too much code churn) - update subject line and patch description - dropped net: pktgen: hex32_arg/num_arg error out in case no characters are available - keep empty hex/num arg is implicit assumed as zero value - dropped net: pktgen: num_arg error out in case no valid character is parsed - keep empty hex/num arg is implicit assumed as zero value - Change patch description ('Fixes:' -> 'Addresses the following:', suggested by Simon Horman) - net: pktgen: remove all superfluous index assignements - new patch (suggested by Simon Horman) - selftest: net: add proc_net_pktgen - addapt to dropped patch 'net: pktgen: hex32_arg/num_arg error out in case no characters are available', empty hex/num arg is now implicit assumed as zero value (instead of failure) Changes v3 -> v4: - add rev-by Simon Horman - new patch 'net: pktgen: use defines for the various dec/hex number parsing digits lengths' (suggested by Simon Horman) - replace C99 comment (suggested by Paolo Abeni) - drop available characters check in strn_len() (suggested by Paolo Abeni) - factored out patch 'net: pktgen: align some variable declarations to the most common pattern' (suggested by Paolo Abeni) - factored out patch 'net: pktgen: remove extra tmp variable (re-use len instead)' (suggested by Paolo Abeni) - factored out patch 'net: pktgen: remove some superfluous variable initializing' (suggested by Paolo Abeni) - factored out patch 'net: pktgen: fix mpls maximum labels list parsing' (suggested by Paolo Abeni) - factored out 'net: pktgen: hex32_arg/num_arg error out in case no characters are available' (suggested by Paolo Abeni) - factored out 'net: pktgen: num_arg error out in case no valid character is parsed' (suggested by Paolo Abeni) Changes v2 -> v3: - new patch: 'net: pktgen: fix ctrl interface command parsing' - new patch: 'net: pktgen: fix mpls reset parsing' - tools/testing/selftests/net/proc_net_pktgen.c: - fix typo in change description ('v1 -> v1' and tyop) - rename some vars to better match usage add_loopback_0 -> thr_cmd_add_loopback_0 rm_loopback_0 -> thr_cmd_rm_loopback_0 wrong_ctrl_cmd -> wrong_thr_cmd legacy_ctrl_cmd -> legacy_thr_cmd ctrl_fd -> thr_fd - add ctrl interface tests Changes v1 -> v2: - new patch: 'net: pktgen: fix hex32_arg parsing for short reads' - new patch: 'net: pktgen: fix 'rate 0' error handling (return -EINVAL)' - new patch: 'net: pktgen: fix 'ratep 0' error handling (return -EINVAL)' - net/core/pktgen.c: additional fix get_imix_entries() and get_labels() - tools/testing/selftests/net/proc_net_pktgen.c: - fix tyop not vs. nod (suggested by Jakub Kicinski) - fix misaligned line (suggested by Jakub Kicinski) - enable fomerly commented out CONFIG_XFRM dependent test (command spi), as CONFIG_XFRM is enabled via tools/testing/selftests/net/config CONFIG_XFRM_INTERFACE/CONFIG_XFRM_USER (suggestex by Jakub Kicinski) - add CONFIG_NET_PKTGEN=m to tools/testing/selftests/net/config (suggested by Jakub Kicinski) - add modprobe pktgen to FIXTURE_SETUP() (suggested by Jakub Kicinski) - fix some checkpatch warnings (Missing a blank line after declarations) - shrink line length by re-naming some variables (command -> cmd, device -> dev) - add 'rate 0' testcase - add 'ratep 0' testcase [1] https://lore.kernel.org/netdev/20241006221221.3744995-1-artem.chernyshev@re… [2] https://lore.kernel.org/netdev/20250109083039.14004-1-pchelkin@ispras.ru/ [3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… Peter Seiderer (8): net: pktgen: fix mix of int/long net: pktgen: remove extra tmp variable (re-use len instead) net: pktgen: remove some superfluous variable initializing net: pktgen: fix mpls maximum labels list parsing net: pktgen: fix access outside of user given buffer in pktgen_if_write() net: pktgen: fix mpls reset parsing net: pktgen: remove all superfluous index assignements selftest: net: add proc_net_pktgen net/core/pktgen.c | 288 ++++---- tools/testing/selftests/net/Makefile | 1 + tools/testing/selftests/net/config | 1 + tools/testing/selftests/net/proc_net_pktgen.c | 646 ++++++++++++++++++ 4 files changed, 805 insertions(+), 131 deletions(-) create mode 100644 tools/testing/selftests/net/proc_net_pktgen.c -- 2.48.1

1 month, 3 weeks

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[PATCH][next] selftests/x86/xstate: Fix spelling mistake "hader" -> "header"

by Colin Ian King

There is a spelling mistake in a sig_print message. Fix it. Signed-off-by: Colin Ian King <colin.i.king(a)gmail.com> --- tools/testing/selftests/x86/xstate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/x86/xstate.c b/tools/testing/selftests/x86/xstate.c index 875777911d82..23c1d6c964ea 100644 --- a/tools/testing/selftests/x86/xstate.c +++ b/tools/testing/selftests/x86/xstate.c @@ -391,7 +391,7 @@ static void validate_sigfpstate(int sig, siginfo_t *si, void *ctx_void) if (get_xstatebv(xbuf) & xstate.mask) sig_print("[OK]\t'xfeatures' in XSAVE header is valid\n"); else - sig_print("[FAIL]\t'xfeatures' in XSAVE hader is not valid\n"); + sig_print("[FAIL]\t'xfeatures' in XSAVE header is not valid\n"); if (validate_xstate_same(stashed_xbuf, xbuf)) sig_print("[OK]\txstate delivery was successful\n"); -- 2.47.2

1 month, 3 weeks

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[PATCH sysctl-next v2] selftests/sysctl: fix wording of help messages

by Bharadwaj Raju

Fix grammar such as "number amount of times is recommended" etc -> "the recommended number of times". Signed-off-by: Bharadwaj Raju <bharadwaj.raju777(a)gmail.com> --- tools/testing/selftests/sysctl/sysctl.sh | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/sysctl/sysctl.sh b/tools/testing/selftests/sysctl/sysctl.sh index f6e129a82ffd..db1616857d89 100755 --- a/tools/testing/selftests/sysctl/sysctl.sh +++ b/tools/testing/selftests/sysctl/sysctl.sh @@ -857,7 +857,7 @@ list_tests() echo echo "TEST_ID x NUM_TEST" echo "TEST_ID: Test ID" - echo "NUM_TESTS: Number of recommended times to run the test" + echo "NUM_TESTS: Recommended number of times to run the test" echo echo "0001 x $(get_test_count 0001) - tests proc_dointvec_minmax()" echo "0002 x $(get_test_count 0002) - tests proc_dostring()" @@ -884,7 +884,7 @@ usage() echo "Valid tests: 0001-$MAX_TEST" echo "" echo " all Runs all tests (default)" - echo " -t Run test ID the number amount of times is recommended" + echo " -t Run test ID the recommended number of times" echo " -w Watch test ID run until it runs into an error" echo " -c Run test ID once" echo " -s Run test ID x test-count number of times" @@ -898,7 +898,7 @@ usage() echo Example uses: echo echo "$TEST_NAME.sh -- executes all tests" - echo "$TEST_NAME.sh -t 0002 -- Executes test ID 0002 number of times is recommended" + echo "$TEST_NAME.sh -t 0002 -- Executes test ID 0002 the recommended number of times" echo "$TEST_NAME.sh -w 0002 -- Watch test ID 0002 run until an error occurs" echo "$TEST_NAME.sh -s 0002 -- Run test ID 0002 once" echo "$TEST_NAME.sh -c 0002 3 -- Run test ID 0002 three times" -- 2.48.1

1 month, 3 weeks

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[PATCH net-next 0/2] expand cmsg_ipv6.sh with ipv4 support

by Willem de Bruijn

From: Willem de Bruijn <willemb(a)google.com> Expand IPV6_TCLASS to also cover IP_TOS. Expand IPV6_HOPLIMIT to also cover IP_TTL. A series of two patches for basic readability (patch 1 is a noop), and so that git does not interpret code changes + file rename as a whole file del + add. Willem de Bruijn (2): selftests/net: prepare cmsg_ipv6.sh for ipv4 selftests/net: expand cmsg_ipv6.sh with ipv4 tools/testing/selftests/net/Makefile | 2 +- tools/testing/selftests/net/cmsg_ip.sh | 184 ++++++++++++++++++++++ tools/testing/selftests/net/cmsg_ipv6.sh | 154 ------------------ tools/testing/selftests/net/cmsg_sender.c | 90 +++++++---- 4 files changed, 240 insertions(+), 190 deletions(-) create mode 100755 tools/testing/selftests/net/cmsg_ip.sh delete mode 100755 tools/testing/selftests/net/cmsg_ipv6.sh -- 2.48.1.658.g4767266eb4-goog

1 month, 3 weeks

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[PATCH V2 0/3] selftests: add ublk selftests

by Ming Lei

Hello Guys, The 1st patch adds one ublk utility and one entry test. The 2nd patch adds test over file backed ublk. The 3rd patch adds test for ublk zero copy. How to run: - make install - make headers_install INSTALL_HDR_PATH=/usr # in case UAPI is changed - reboot - make -C tools/testing/selftests TARGETS=ublk run_test Thanks, V2: - fix one sqe allocation bug, so ublk zero copy with io_link can pass - dump log in case of error - add one more test for mkfs/mount on zero copy Ming Lei (3): selftests: ublk: add kernel selftests for ublk selftests: ublk: add file backed ublk selftests: ublk: add ublk zero copy test MAINTAINERS | 1 + tools/testing/selftests/Makefile | 1 + tools/testing/selftests/ublk/.gitignore | 3 + tools/testing/selftests/ublk/Makefile | 15 + tools/testing/selftests/ublk/config | 1 + tools/testing/selftests/ublk/kublk.c | 1679 ++++++++++++++++++ tools/testing/selftests/ublk/test_common.sh | 112 ++ tools/testing/selftests/ublk/test_loop_01.sh | 30 + tools/testing/selftests/ublk/test_loop_02.sh | 21 + tools/testing/selftests/ublk/test_loop_03.sh | 32 + tools/testing/selftests/ublk/test_loop_04.sh | 21 + tools/testing/selftests/ublk/test_null_01.sh | 18 + 12 files changed, 1934 insertions(+) create mode 100644 tools/testing/selftests/ublk/.gitignore create mode 100644 tools/testing/selftests/ublk/Makefile create mode 100644 tools/testing/selftests/ublk/config create mode 100644 tools/testing/selftests/ublk/kublk.c create mode 100755 tools/testing/selftests/ublk/test_common.sh create mode 100755 tools/testing/selftests/ublk/test_loop_01.sh create mode 100755 tools/testing/selftests/ublk/test_loop_02.sh create mode 100755 tools/testing/selftests/ublk/test_loop_03.sh create mode 100755 tools/testing/selftests/ublk/test_loop_04.sh create mode 100755 tools/testing/selftests/ublk/test_null_01.sh -- 2.47.0

1 month, 3 weeks

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[PATCH v2] 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 pointer to a 64bit value as a pointer to a 32bit value, 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") Reviewed-by: Jens Remus <jremus(a)linux.ibm.com> Signed-off-by: Thomas Weißschuh <thomas.weissschuh(a)linutronix.de> --- Changes in v2: - Fix wording around the width of pointers vs the pointed-to values - Link to v1: https://lore.kernel.org/r/20250213-selftests-vdso-s390-gnu-hash-v1-1-ace3bc… --- 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>

1 month, 3 weeks

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