From 34ff636f322c6d5e4f0a52338fa63a7dff09a495 Mon Sep 17 00:00:00 2001 From: Joel Fernandes Date: Sat, 18 Jul 2026 13:15:36 -0400 Subject: scftorture: Count single_rpc offline failures in statistics output scf_torture_stats_print() aggregates each invoker thread's counters into a local scf_statistics structure before printing, but the n_single_rpc_ofl field is missing from the aggregation loop. As a result, the "single_rpc_ofl" value printed in the statistics line is always zero, even when smp_call_function_single() invocations for the RPC test have failed due to offline CPUs and been counted by the invoker threads. Add the missing accumulation so that the printed value reflects the actual counts. Signed-off-by: Joel Fernandes Signed-off-by: Paul E. McKenney --- tools/testing/selftests/fchmodat2/.gitignore | 2 + tools/testing/selftests/fchmodat2/Makefile | 15 ++ tools/testing/selftests/fchmodat2/fchmodat2_test.c | 200 +++++++++++++++++++++ 3 files changed, 217 insertions(+) create mode 100644 tools/testing/selftests/fchmodat2/.gitignore create mode 100644 tools/testing/selftests/fchmodat2/Makefile create mode 100644 tools/testing/selftests/fchmodat2/fchmodat2_test.c (limited to 'tools/testing/selftests/fchmodat2') diff --git a/tools/testing/selftests/fchmodat2/.gitignore b/tools/testing/selftests/fchmodat2/.gitignore new file mode 100644 index 000000000..82a4846cb --- /dev/null +++ b/tools/testing/selftests/fchmodat2/.gitignore @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +/*_test diff --git a/tools/testing/selftests/fchmodat2/Makefile b/tools/testing/selftests/fchmodat2/Makefile new file mode 100644 index 000000000..4373cea79 --- /dev/null +++ b/tools/testing/selftests/fchmodat2/Makefile @@ -0,0 +1,15 @@ +# SPDX-License-Identifier: GPL-2.0-or-later + +CFLAGS += -Wall -O2 -g -fsanitize=address -fsanitize=undefined $(KHDR_INCLUDES) + +# gcc requires -static-libasan in order to ensure that Address Sanitizer's +# library is the first one loaded. However, clang already statically links the +# Address Sanitizer if -fsanitize is specified. Therefore, simply omit +# -static-libasan for clang builds. +ifeq ($(LLVM),) + CFLAGS += -static-libasan +endif + +TEST_GEN_PROGS := fchmodat2_test + +include ../lib.mk diff --git a/tools/testing/selftests/fchmodat2/fchmodat2_test.c b/tools/testing/selftests/fchmodat2/fchmodat2_test.c new file mode 100644 index 000000000..8e1b6384b --- /dev/null +++ b/tools/testing/selftests/fchmodat2/fchmodat2_test.c @@ -0,0 +1,200 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#define _GNU_SOURCE +#include +#include +#include +#include +#include + +#include "kselftest.h" + +struct testdir { + char *dirname; + int dfd; +}; + +int sys_fchmodat2(int dfd, const char *filename, mode_t mode, int flags) +{ + int ret = syscall(__NR_fchmodat2, dfd, filename, mode, flags); + + return ret >= 0 ? ret : -errno; +} + +static void setup_testdir(struct testdir *testdir) +{ + int ret, dfd; + char dirname[] = "/tmp/ksft-fchmodat2.XXXXXX"; + + /* Make the top-level directory. */ + if (!mkdtemp(dirname)) + ksft_exit_fail_msg("%s: failed to create tmpdir\n", __func__); + + dfd = open(dirname, O_PATH | O_DIRECTORY); + if (dfd < 0) { + ksft_perror("failed to open tmpdir"); + goto err; + } + + ret = openat(dfd, "regfile", O_CREAT | O_WRONLY | O_TRUNC, 0644); + if (ret < 0) { + ksft_perror("failed to create file in tmpdir"); + goto err; + } + close(ret); + + ret = symlinkat("regfile", dfd, "symlink"); + if (ret < 0) { + ksft_perror("symlinkat() failed"); + goto err_regfile; + } + + testdir->dirname = strdup(dirname); + if (!testdir->dirname) { + ksft_perror("Out of memory"); + goto err_symlink; + } + testdir->dfd = dfd; + + return; + +err_symlink: + unlinkat(testdir->dfd, "symlink", 0); +err_regfile: + unlinkat(testdir->dfd, "regfile", 0); +err: + unlink(dirname); + ksft_exit_fail(); +} + +static void cleanup_testdir(struct testdir *testdir) +{ + unlinkat(testdir->dfd, "regfile", 0); + unlinkat(testdir->dfd, "symlink", 0); + rmdir(testdir->dirname); + free(testdir->dirname); +} + +int expect_mode(int dfd, const char *filename, mode_t expect_mode) +{ + struct stat st; + int ret = fstatat(dfd, filename, &st, AT_SYMLINK_NOFOLLOW); + + if (ret) { + ksft_perror("fstatat() failed\n"); + return 0; + } + + return (st.st_mode == expect_mode); +} + +void test_regfile(void) +{ + struct testdir testdir; + int ret; + + setup_testdir(&testdir); + + ret = sys_fchmodat2(testdir.dfd, "regfile", 0640, 0); + + if (ret < 0) { + ksft_perror("fchmodat2(noflag) failed"); + goto out; + } + + if (!expect_mode(testdir.dfd, "regfile", 0100640)) { + ksft_print_msg("%s: wrong file mode bits after fchmodat2\n", + __func__); + ret = 1; + goto out; + } + + ret = sys_fchmodat2(testdir.dfd, "regfile", 0600, AT_SYMLINK_NOFOLLOW); + + if (ret < 0) { + ksft_perror("fchmodat2(AT_SYMLINK_NOFOLLOW) failed"); + goto out; + } + + if (!expect_mode(testdir.dfd, "regfile", 0100600)) { + ksft_print_msg("%s: wrong file mode bits after fchmodat2 with nofollow\n", + __func__); + ret = 1; + } + +out: + ksft_test_result(ret == 0, "fchmodat2(regfile)\n"); + cleanup_testdir(&testdir); +} + +void test_symlink(void) +{ + struct testdir testdir; + int ret; + + setup_testdir(&testdir); + + ret = sys_fchmodat2(testdir.dfd, "symlink", 0640, 0); + + if (ret < 0) { + ksft_perror("fchmodat2(noflag) failed"); + goto err; + } + + if (!expect_mode(testdir.dfd, "regfile", 0100640)) { + ksft_print_msg("%s: wrong file mode bits after fchmodat2\n", + __func__); + goto err; + } + + if (!expect_mode(testdir.dfd, "symlink", 0120777)) { + ksft_print_msg("%s: wrong symlink mode bits after fchmodat2\n", + __func__); + goto err; + } + + ret = sys_fchmodat2(testdir.dfd, "symlink", 0600, AT_SYMLINK_NOFOLLOW); + + /* + * On certain filesystems (xfs or btrfs), chmod operation fails. So we + * first check the symlink target but if the operation fails we mark the + * test as skipped. + * + * https://sourceware.org/legacy-ml/libc-alpha/2020-02/msg00467.html + */ + if (ret == 0 && !expect_mode(testdir.dfd, "symlink", 0120600)) { + ksft_print_msg("%s: wrong symlink mode bits after fchmodat2 with nofollow\n", + __func__); + ret = 1; + goto err; + } + + if (!expect_mode(testdir.dfd, "regfile", 0100640)) { + ksft_print_msg("%s: wrong file mode bits after fchmodat2 with nofollow\n", + __func__); + } + + if (ret != 0) + ksft_test_result_skip("fchmodat2(symlink)\n"); + else + ksft_test_result_pass("fchmodat2(symlink)\n"); + cleanup_testdir(&testdir); + return; + +err: + ksft_test_result_fail("fchmodat2(symlink)\n"); + cleanup_testdir(&testdir); +} + +#define NUM_TESTS 2 + +int main(int argc, char **argv) +{ + ksft_print_header(); + ksft_set_plan(NUM_TESTS); + + test_regfile(); + test_symlink(); + + ksft_finished(); +} -- cgit v1.3.1