From: Andrei Vagin avagin@openvz.org
Check that timer_create takes into account clock offsets.
Cc: linux-kselftest@vger.kernel.org Signed-off-by: Andrei Vagin avagin@openvz.org Signed-off-by: Dmitry Safonov dima@arista.com --- tools/testing/selftests/timens/.gitignore | 1 + tools/testing/selftests/timens/Makefile | 3 +- tools/testing/selftests/timens/timer.c | 95 +++++++++++++++++++++++++++++++ 3 files changed, 98 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 94ffdd9cead7..3b7eda8f35ce 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 f96f50d1fef8..ae1ffd24cc43 100644 --- a/tools/testing/selftests/timens/Makefile +++ b/tools/testing/selftests/timens/Makefile @@ -1,5 +1,6 @@ -TEST_GEN_PROGS := timens timerfd clock_nanosleep procfs +TEST_GEN_PROGS := timens timerfd timer clock_nanosleep procfs
CFLAGS := -Wall -Werror +LDFLAGS := -lrt
include ../lib.mk diff --git a/tools/testing/selftests/timens/timer.c b/tools/testing/selftests/timens/timer.c new file mode 100644 index 000000000000..e3a0951aadc8 --- /dev/null +++ b/tools/testing/selftests/timens/timer.c @@ -0,0 +1,95 @@ +// SPDX-License-Identifier: GPL-2.0 +#define _GNU_SOURCE +#include <sched.h> + +#include <sys/syscall.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" + +#ifndef CLONE_NEWTIME +#define CLONE_NEWTIME 0x00001000 /* New time namespace */ +#endif + +int run_test(int clockid) +{ + struct itimerspec new_value; + struct timespec now; + long long elapsed; + timer_t fd; + int i; + + if (clock_gettime(clockid, &now) == -1) + return pr_perror("clock_gettime"); + + for (i = 0; i < 2; i++) { + struct sigevent sevp = {.sigev_notify = SIGEV_NONE}; + int flags = 0; + + pr_msg("timerfd_settime: %d", "INFO", clockid); + 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) + 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) { + pr_fail("elapsed: %lld\n", elapsed); + return 1; + } + } + + printf("PASS\n"); + + return 0; +} + +int main(int argc, char *argv[]) +{ + struct timespec tp; + int ret; + + if (unshare(CLONE_NEWTIME)) + return pr_perror("unshare"); + + if (clock_gettime(CLOCK_MONOTONIC, &tp)) + return pr_perror("clock_gettime"); + tp.tv_sec -= 70 * 24 * 3600; + if (clock_settime(CLOCK_MONOTONIC, &tp)) + return pr_perror("clock_settime"); + + if (clock_gettime(CLOCK_BOOTTIME, &tp)) + return pr_perror("clock_gettime"); + tp.tv_sec -= 9 * 24 * 3600; + tp.tv_nsec = 0; + if (clock_settime(CLOCK_BOOTTIME, &tp)) + return pr_perror("clock_settime"); + + ret = 0; + ret |= run_test(CLOCK_BOOTTIME); + ret |= run_test(CLOCK_MONOTONIC); + return ret; +} +