Output on success: $ ./futex 1..1 ok 1 futex # Totals: pass:1 fail:0 xfail:0 xpass:0 skip:0 error:0
Signed-off-by: Andrei Vagin <ava...@gmail.com> --- tools/testing/selftests/timens/Makefile | 2 +- tools/testing/selftests/timens/futex.c | 107 ++++++++++++++++++++++++ 2 files changed, 108 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/timens/futex.c diff --git a/tools/testing/selftests/timens/Makefile b/tools/testing/selftests/timens/Makefile index b4fd9a934654..3a5936cc10ab 100644 --- a/tools/testing/selftests/timens/Makefile +++ b/tools/testing/selftests/timens/Makefile @@ -1,4 +1,4 @@ -TEST_GEN_PROGS := timens timerfd timer clock_nanosleep procfs exec +TEST_GEN_PROGS := timens timerfd timer clock_nanosleep procfs exec futex TEST_GEN_PROGS_EXTENDED := gettime_perf CFLAGS := -Wall -Werror -pthread diff --git a/tools/testing/selftests/timens/futex.c b/tools/testing/selftests/timens/futex.c new file mode 100644 index 000000000000..173760d3fce6 --- /dev/null +++ b/tools/testing/selftests/timens/futex.c @@ -0,0 +1,107 @@ +// SPDX-License-Identifier: GPL-2.0 +#define _GNU_SOURCE +#include <sched.h> + +#include <linux/unistd.h> +#include <linux/futex.h> +#include <stdlib.h> +#include <signal.h> +#include <stdio.h> +#include <stdint.h> +#include <string.h> +#include <sys/syscall.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <time.h> +#include <unistd.h> + +#include "log.h" +#include "timens.h" + +#define NSEC_PER_SEC 1000000000ULL + +static int run_test(void) +{ + struct timespec timeout, end; + int val = 0; + + clock_gettime(CLOCK_MONOTONIC, &timeout); + timeout.tv_nsec += NSEC_PER_SEC / 10; // 100ms + if (timeout.tv_nsec > NSEC_PER_SEC) { + timeout.tv_sec++; + timeout.tv_nsec -= NSEC_PER_SEC; + } + + if (syscall(__NR_futex, &val, FUTEX_WAIT_BITSET, 0, + &timeout, 0, FUTEX_BITSET_MATCH_ANY) >= 0) { + ksft_test_result_fail("futex didn't return ETIMEDOUT"); + return 1; + } + + if (errno != ETIMEDOUT) { + ksft_test_result_fail("futex didn't return ETIMEDOUT: %s", + strerror(errno)); + return 1; + } + + clock_gettime(CLOCK_MONOTONIC, &end); + + if (end.tv_sec < timeout.tv_sec || + (end.tv_sec == timeout.tv_sec && end.tv_nsec < timeout.tv_sec)) { + ksft_test_result_fail("futex slept less than 100ms"); + return 1; + } + + + ksft_test_result_pass("futex\n"); + + return 0; +} + +int main(int argc, char *argv[]) +{ + int status, len, fd; + char buf[4096]; + pid_t pid; + struct timespec mtime_now; + + nscheck(); + + check_supported_timers(); + + ksft_set_plan(1); + + clock_gettime(CLOCK_MONOTONIC, &mtime_now); + + if (unshare_timens()) + return 1; + + len = snprintf(buf, sizeof(buf), "%d %d 0", + CLOCK_MONOTONIC, 70 * 24 * 3600); + fd = open("/proc/self/timens_offsets", O_WRONLY); + if (fd < 0) + return pr_perror("/proc/self/timens_offsets"); + + if (write(fd, buf, len) != len) + return pr_perror("/proc/self/timens_offsets"); + + close(fd); + + pid = fork(); + if (pid < 0) + return pr_perror("Unable to fork"); + if (pid == 0) { + if (run_test()) + ksft_exit_fail(); + ksft_exit_pass(); + return 0; + } + + if (waitpid(pid, &status, 0) != pid) + return pr_perror("Unable to wait the child process"); + + if (WIFEXITED(status)) + return WEXITSTATUS(status); + + return 1; +} -- 2.26.2