diff options
Diffstat (limited to 'tools/testing/selftests/timens/timerfd.c')
-rw-r--r-- | tools/testing/selftests/timens/timerfd.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/tools/testing/selftests/timens/timerfd.c b/tools/testing/selftests/timens/timerfd.c new file mode 100644 index 000000000..9edd43d6b --- /dev/null +++ b/tools/testing/selftests/timens/timerfd.c @@ -0,0 +1,133 @@ +// 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 (check_skip(clockid)) + return 0; + + 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(); + + check_supported_timers(); + + 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; +} |