558ae0355a
This can happen if a testing node doesn't have RTC (real time clock)
hardware or it doesn't support alarms.
Fixes: 61c5767603 ("selftests/timens: Add Time Namespace test for supported clocks")
Acked-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reported-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrei Vagin <avagin@gmail.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
150 lines
3.0 KiB
C
150 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#define _GNU_SOURCE
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#include <sched.h>
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#include <sys/timerfd.h>
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#include <sys/syscall.h>
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#include <time.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <pthread.h>
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#include <signal.h>
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#include <string.h>
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#include "log.h"
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#include "timens.h"
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void test_sig(int sig)
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{
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if (sig == SIGUSR2)
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pthread_exit(NULL);
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}
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struct thread_args {
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struct timespec *now, *rem;
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pthread_mutex_t *lock;
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int clockid;
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int abs;
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};
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void *call_nanosleep(void *_args)
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{
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struct thread_args *args = _args;
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clock_nanosleep(args->clockid, args->abs ? TIMER_ABSTIME : 0, args->now, args->rem);
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pthread_mutex_unlock(args->lock);
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return NULL;
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}
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int run_test(int clockid, int abs)
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{
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struct timespec now = {}, rem;
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struct thread_args args = { .now = &now, .rem = &rem, .clockid = clockid};
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struct timespec start;
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pthread_mutex_t lock;
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pthread_t thread;
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int j, ok, ret;
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signal(SIGUSR1, test_sig);
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signal(SIGUSR2, test_sig);
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pthread_mutex_init(&lock, NULL);
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pthread_mutex_lock(&lock);
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if (clock_gettime(clockid, &start) == -1) {
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if (errno == EINVAL && check_skip(clockid))
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return 0;
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return pr_perror("clock_gettime");
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}
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if (abs) {
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now.tv_sec = start.tv_sec;
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now.tv_nsec = start.tv_nsec;
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}
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now.tv_sec += 3600;
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args.abs = abs;
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args.lock = &lock;
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ret = pthread_create(&thread, NULL, call_nanosleep, &args);
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if (ret != 0) {
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pr_err("Unable to create a thread: %s", strerror(ret));
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return 1;
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}
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/* Wait when the thread will call clock_nanosleep(). */
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ok = 0;
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for (j = 0; j < 8; j++) {
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/* The maximum timeout is about 5 seconds. */
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usleep(10000 << j);
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/* Try to interrupt clock_nanosleep(). */
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pthread_kill(thread, SIGUSR1);
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usleep(10000 << j);
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/* Check whether clock_nanosleep() has been interrupted or not. */
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if (pthread_mutex_trylock(&lock) == 0) {
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/**/
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ok = 1;
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break;
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}
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}
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if (!ok)
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pthread_kill(thread, SIGUSR2);
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pthread_join(thread, NULL);
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pthread_mutex_destroy(&lock);
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if (!ok) {
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ksft_test_result_pass("clockid: %d abs:%d timeout\n", clockid, abs);
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return 1;
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}
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if (rem.tv_sec < 3300 || rem.tv_sec > 3900) {
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pr_fail("clockid: %d abs: %d remain: %ld\n",
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clockid, abs, rem.tv_sec);
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return 1;
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}
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ksft_test_result_pass("clockid: %d abs:%d\n", clockid, abs);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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int ret, nsfd;
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nscheck();
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ksft_set_plan(4);
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check_supported_timers();
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if (unshare_timens())
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return 1;
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if (_settime(CLOCK_MONOTONIC, 7 * 24 * 3600))
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return 1;
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if (_settime(CLOCK_BOOTTIME, 9 * 24 * 3600))
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return 1;
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nsfd = open("/proc/self/ns/time_for_children", O_RDONLY);
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if (nsfd < 0)
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return pr_perror("Unable to open timens_for_children");
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if (setns(nsfd, CLONE_NEWTIME))
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return pr_perror("Unable to set timens");
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ret = 0;
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ret |= run_test(CLOCK_MONOTONIC, 0);
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ret |= run_test(CLOCK_MONOTONIC, 1);
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ret |= run_test(CLOCK_BOOTTIME_ALARM, 0);
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ret |= run_test(CLOCK_BOOTTIME_ALARM, 1);
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if (ret)
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ksft_exit_fail();
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ksft_exit_pass();
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return ret;
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}
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