The following commit has been merged into the timers/core branch of tip: Commit-ID: d5b0117ddd4949e9ed882b6ef91316719826e8a8 Gitweb: https://git.kernel.org/tip/d5b0117ddd4949e9ed882b6ef91316719826e8a8 Author: Andrei Vagin <avagin@xxxxxxxxxx> AuthorDate: Tue, 12 Nov 2019 01:27:21 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitterDate: Tue, 14 Jan 2020 12:21:01 +01:00 selftests/timens: Add timer offsets test Check that timer_create() takes into account clock offsets. Output on success: 1..3 ok 1 clockid=7 ok 2 clockid=1 ok 3 clockid=9 # Pass 3 Fail 0 Xfail 0 Xpass 0 Skip 0 Error 0 Output with lack of permissions: 1..3 not ok 1 # SKIP need to run as root Output without support of time namespaces: 1..3 not ok 1 # SKIP Time namespaces are not supported Co-developed-by: Dmitry Safonov <dima@xxxxxxxxxx> Signed-off-by: Andrei Vagin <avagin@xxxxxxxxx> Signed-off-by: Dmitry Safonov <dima@xxxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20191112012724.250792-33-dima@xxxxxxxxxx --- tools/testing/selftests/timens/.gitignore | 1 +- tools/testing/selftests/timens/Makefile | 2 +- tools/testing/selftests/timens/timer.c | 122 +++++++++++++++++++++- 3 files changed, 124 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/timens/timer.c diff --git a/tools/testing/selftests/timens/.gitignore b/tools/testing/selftests/timens/.gitignore index 94ffdd9..3b7eda8 100644 --- a/tools/testing/selftests/timens/.gitignore +++ b/tools/testing/selftests/timens/.gitignore @@ -1,4 +1,5 @@ clock_nanosleep procfs timens +timer timerfd diff --git a/tools/testing/selftests/timens/Makefile b/tools/testing/selftests/timens/Makefile index 8a33df7..0816454 100644 --- a/tools/testing/selftests/timens/Makefile +++ b/tools/testing/selftests/timens/Makefile @@ -1,4 +1,4 @@ -TEST_GEN_PROGS := timens timerfd clock_nanosleep procfs +TEST_GEN_PROGS := timens timerfd timer clock_nanosleep procfs CFLAGS := -Wall -Werror -pthread LDFLAGS := -lrt diff --git a/tools/testing/selftests/timens/timer.c b/tools/testing/selftests/timens/timer.c new file mode 100644 index 0000000..0cca7aa --- /dev/null +++ b/tools/testing/selftests/timens/timer.c @@ -0,0 +1,122 @@ +// SPDX-License-Identifier: GPL-2.0 +#define _GNU_SOURCE +#include <sched.h> + +#include <sys/syscall.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <time.h> +#include <unistd.h> +#include <stdlib.h> +#include <stdio.h> +#include <stdint.h> +#include <signal.h> +#include <time.h> + +#include "log.h" +#include "timens.h" + +int run_test(int clockid, struct timespec now) +{ + struct itimerspec new_value; + long long elapsed; + timer_t fd; + int i; + + for (i = 0; i < 2; i++) { + struct sigevent sevp = {.sigev_notify = SIGEV_NONE}; + int flags = 0; + + new_value.it_value.tv_sec = 3600; + new_value.it_value.tv_nsec = 0; + new_value.it_interval.tv_sec = 1; + new_value.it_interval.tv_nsec = 0; + + if (i == 1) { + new_value.it_value.tv_sec += now.tv_sec; + new_value.it_value.tv_nsec += now.tv_nsec; + } + + if (timer_create(clockid, &sevp, &fd) == -1) { + if (errno == ENOSYS) { + ksft_test_result_skip("Posix Clocks & timers are supported\n"); + return 0; + } + return pr_perror("timerfd_create"); + } + + if (i == 1) + flags |= TIMER_ABSTIME; + if (timer_settime(fd, flags, &new_value, NULL) == -1) + return pr_perror("timerfd_settime"); + + if (timer_gettime(fd, &new_value) == -1) + return pr_perror("timerfd_gettime"); + + elapsed = new_value.it_value.tv_sec; + if (abs(elapsed - 3600) > 60) { + ksft_test_result_fail("clockid: %d elapsed: %lld\n", + clockid, elapsed); + return 1; + } + } + + ksft_test_result_pass("clockid=%d\n", clockid); + + return 0; +} + +int main(int argc, char *argv[]) +{ + int ret, status, len, fd; + char buf[4096]; + pid_t pid; + struct timespec btime_now, mtime_now; + + nscheck(); + + ksft_set_plan(3); + + clock_gettime(CLOCK_MONOTONIC, &mtime_now); + clock_gettime(CLOCK_BOOTTIME, &btime_now); + + if (unshare_timens()) + return 1; + + len = snprintf(buf, sizeof(buf), "%d %d 0\n%d %d 0", + CLOCK_MONOTONIC, 70 * 24 * 3600, + CLOCK_BOOTTIME, 9 * 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); + mtime_now.tv_sec += 70 * 24 * 3600; + btime_now.tv_sec += 9 * 24 * 3600; + + pid = fork(); + if (pid < 0) + return pr_perror("Unable to fork"); + if (pid == 0) { + ret = 0; + ret |= run_test(CLOCK_BOOTTIME, btime_now); + ret |= run_test(CLOCK_MONOTONIC, mtime_now); + ret |= run_test(CLOCK_BOOTTIME_ALARM, btime_now); + + if (ret) + ksft_exit_fail(); + ksft_exit_pass(); + return ret; + } + + if (waitpid(pid, &status, 0) != pid) + return pr_perror("Unable to wait the child process"); + + if (WIFEXITED(status)) + return WEXITSTATUS(status); + + return 1; +}