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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 <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include "log.h"
#include "timens.h"
static int tclock_gettime(clock_t clockid, struct timespec *now)
{
if (clockid == CLOCK_BOOTTIME_ALARM)
clockid = CLOCK_BOOTTIME;
return clock_gettime(clockid, now);
}
int run_test(int clockid, struct timespec now)
{
struct itimerspec new_value;
long long elapsed;
int fd, i;
if (tclock_gettime(clockid, &now))
return pr_perror("clock_gettime(%d)", clockid);
for (i = 0; i < 2; i++) {
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;
}
fd = timerfd_create(clockid, 0);
if (fd == -1)
return pr_perror("timerfd_create(%d)", clockid);
if (i == 1)
flags |= TFD_TIMER_ABSTIME;
if (timerfd_settime(fd, flags, &new_value, NULL))
return pr_perror("timerfd_settime(%d)", clockid);
if (timerfd_gettime(fd, &new_value))
return pr_perror("timerfd_gettime(%d)", clockid);
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;
}
close(fd);
}
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;
}
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