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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 00:48:50 +00:00
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>
133 lines
2.8 KiB
C
133 lines
2.8 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 <sys/types.h>
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#include <sys/wait.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 "log.h"
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#include "timens.h"
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static int tclock_gettime(clock_t clockid, struct timespec *now)
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{
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if (clockid == CLOCK_BOOTTIME_ALARM)
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clockid = CLOCK_BOOTTIME;
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return clock_gettime(clockid, now);
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}
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int run_test(int clockid, struct timespec now)
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{
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struct itimerspec new_value;
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long long elapsed;
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int fd, i;
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if (check_skip(clockid))
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return 0;
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if (tclock_gettime(clockid, &now))
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return pr_perror("clock_gettime(%d)", clockid);
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for (i = 0; i < 2; i++) {
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int flags = 0;
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new_value.it_value.tv_sec = 3600;
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new_value.it_value.tv_nsec = 0;
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new_value.it_interval.tv_sec = 1;
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new_value.it_interval.tv_nsec = 0;
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if (i == 1) {
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new_value.it_value.tv_sec += now.tv_sec;
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new_value.it_value.tv_nsec += now.tv_nsec;
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}
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fd = timerfd_create(clockid, 0);
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if (fd == -1)
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return pr_perror("timerfd_create(%d)", clockid);
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if (i == 1)
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flags |= TFD_TIMER_ABSTIME;
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if (timerfd_settime(fd, flags, &new_value, NULL))
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return pr_perror("timerfd_settime(%d)", clockid);
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if (timerfd_gettime(fd, &new_value))
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return pr_perror("timerfd_gettime(%d)", clockid);
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elapsed = new_value.it_value.tv_sec;
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if (abs(elapsed - 3600) > 60) {
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ksft_test_result_fail("clockid: %d elapsed: %lld\n",
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clockid, elapsed);
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return 1;
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}
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close(fd);
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}
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ksft_test_result_pass("clockid=%d\n", clockid);
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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, status, len, fd;
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char buf[4096];
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pid_t pid;
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struct timespec btime_now, mtime_now;
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nscheck();
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check_supported_timers();
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ksft_set_plan(3);
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clock_gettime(CLOCK_MONOTONIC, &mtime_now);
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clock_gettime(CLOCK_BOOTTIME, &btime_now);
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if (unshare_timens())
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return 1;
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len = snprintf(buf, sizeof(buf), "%d %d 0\n%d %d 0",
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CLOCK_MONOTONIC, 70 * 24 * 3600,
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CLOCK_BOOTTIME, 9 * 24 * 3600);
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fd = open("/proc/self/timens_offsets", O_WRONLY);
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if (fd < 0)
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return pr_perror("/proc/self/timens_offsets");
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if (write(fd, buf, len) != len)
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return pr_perror("/proc/self/timens_offsets");
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close(fd);
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mtime_now.tv_sec += 70 * 24 * 3600;
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btime_now.tv_sec += 9 * 24 * 3600;
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pid = fork();
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if (pid < 0)
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return pr_perror("Unable to fork");
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if (pid == 0) {
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ret = 0;
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ret |= run_test(CLOCK_BOOTTIME, btime_now);
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ret |= run_test(CLOCK_MONOTONIC, mtime_now);
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ret |= run_test(CLOCK_BOOTTIME_ALARM, btime_now);
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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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if (waitpid(pid, &status, 0) != pid)
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return pr_perror("Unable to wait the child process");
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if (WIFEXITED(status))
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return WEXITSTATUS(status);
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return 1;
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}
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