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// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <sched.h>
#include <sys/timerfd.h>
#include <sys/syscall.h>
#include <time.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <pthread.h>
#include <signal.h>
#include <string.h>
#include "log.h"
#include "timens.h"
void test_sig(int sig)
{
if (sig == SIGUSR2)
pthread_exit(NULL);
}
struct thread_args {
struct timespec *now, *rem;
pthread_mutex_t *lock;
int clockid;
int abs;
};
void *call_nanosleep(void *_args)
{
struct thread_args *args = _args;
clock_nanosleep(args->clockid, args->abs ? TIMER_ABSTIME : 0, args->now, args->rem);
pthread_mutex_unlock(args->lock);
return NULL;
}
int run_test(int clockid, int abs)
{
struct timespec now = {}, rem;
struct thread_args args = { .now = &now, .rem = &rem, .clockid = clockid};
struct timespec start;
pthread_mutex_t lock;
pthread_t thread;
int j, ok, ret;
signal(SIGUSR1, test_sig);
signal(SIGUSR2, test_sig);
pthread_mutex_init(&lock, NULL);
pthread_mutex_lock(&lock);
if (clock_gettime(clockid, &start) == -1) {
if (errno == EINVAL && check_skip(clockid))
return 0;
return pr_perror("clock_gettime");
}
if (abs) {
now.tv_sec = start.tv_sec;
now.tv_nsec = start.tv_nsec;
}
now.tv_sec += 3600;
args.abs = abs;
args.lock = &lock;
ret = pthread_create(&thread, NULL, call_nanosleep, &args);
if (ret != 0) {
pr_err("Unable to create a thread: %s", strerror(ret));
return 1;
}
/* Wait when the thread will call clock_nanosleep(). */
ok = 0;
for (j = 0; j < 8; j++) {
/* The maximum timeout is about 5 seconds. */
usleep(10000 << j);
/* Try to interrupt clock_nanosleep(). */
pthread_kill(thread, SIGUSR1);
usleep(10000 << j);
/* Check whether clock_nanosleep() has been interrupted or not. */
if (pthread_mutex_trylock(&lock) == 0) {
/**/
ok = 1;
break;
}
}
if (!ok)
pthread_kill(thread, SIGUSR2);
pthread_join(thread, NULL);
pthread_mutex_destroy(&lock);
if (!ok) {
ksft_test_result_pass("clockid: %d abs:%d timeout\n", clockid, abs);
return 1;
}
if (rem.tv_sec < 3300 || rem.tv_sec > 3900) {
pr_fail("clockid: %d abs: %d remain: %ld\n",
clockid, abs, rem.tv_sec);
return 1;
}
ksft_test_result_pass("clockid: %d abs:%d\n", clockid, abs);
return 0;
}
int main(int argc, char *argv[])
{
int ret, nsfd;
nscheck();
ksft_set_plan(4);
check_config_posix_timers();
if (unshare_timens())
return 1;
if (_settime(CLOCK_MONOTONIC, 7 * 24 * 3600))
return 1;
if (_settime(CLOCK_BOOTTIME, 9 * 24 * 3600))
return 1;
nsfd = open("/proc/self/ns/time_for_children", O_RDONLY);
if (nsfd < 0)
return pr_perror("Unable to open timens_for_children");
if (setns(nsfd, CLONE_NEWTIME))
return pr_perror("Unable to set timens");
ret = 0;
ret |= run_test(CLOCK_MONOTONIC, 0);
ret |= run_test(CLOCK_MONOTONIC, 1);
ret |= run_test(CLOCK_BOOTTIME_ALARM, 0);
ret |= run_test(CLOCK_BOOTTIME_ALARM, 1);
if (ret)
ksft_exit_fail();
ksft_exit_pass();
return ret;
}
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