127 lines · c
1// SPDX-License-Identifier: GPL-2.02#define _GNU_SOURCE3#include <sched.h>4 5#include <sys/syscall.h>6#include <sys/types.h>7#include <sys/wait.h>8#include <time.h>9#include <unistd.h>10#include <stdlib.h>11#include <stdio.h>12#include <stdint.h>13#include <signal.h>14 15#include "log.h"16#include "timens.h"17 18int run_test(int clockid, struct timespec now)19{20 struct itimerspec new_value;21 long long elapsed;22 timer_t fd;23 int i;24 25 if (check_skip(clockid))26 return 0;27 28 for (i = 0; i < 2; i++) {29 struct sigevent sevp = {.sigev_notify = SIGEV_NONE};30 int flags = 0;31 32 new_value.it_value.tv_sec = 3600;33 new_value.it_value.tv_nsec = 0;34 new_value.it_interval.tv_sec = 1;35 new_value.it_interval.tv_nsec = 0;36 37 if (i == 1) {38 new_value.it_value.tv_sec += now.tv_sec;39 new_value.it_value.tv_nsec += now.tv_nsec;40 }41 42 if (timer_create(clockid, &sevp, &fd) == -1) {43 if (errno == ENOSYS) {44 ksft_test_result_skip("Posix Clocks & timers are supported\n");45 return 0;46 }47 return pr_perror("timerfd_create");48 }49 50 if (i == 1)51 flags |= TIMER_ABSTIME;52 if (timer_settime(fd, flags, &new_value, NULL) == -1)53 return pr_perror("timerfd_settime");54 55 if (timer_gettime(fd, &new_value) == -1)56 return pr_perror("timerfd_gettime");57 58 elapsed = new_value.it_value.tv_sec;59 if (llabs(elapsed - 3600) > 60) {60 ksft_test_result_fail("clockid: %d elapsed: %lld\n",61 clockid, elapsed);62 return 1;63 }64 }65 66 ksft_test_result_pass("clockid=%d\n", clockid);67 68 return 0;69}70 71int main(int argc, char *argv[])72{73 int ret, status, len, fd;74 char buf[4096];75 pid_t pid;76 struct timespec btime_now, mtime_now;77 78 nscheck();79 80 check_supported_timers();81 82 ksft_set_plan(3);83 84 clock_gettime(CLOCK_MONOTONIC, &mtime_now);85 clock_gettime(CLOCK_BOOTTIME, &btime_now);86 87 if (unshare_timens())88 return 1;89 90 len = snprintf(buf, sizeof(buf), "%d %d 0\n%d %d 0",91 CLOCK_MONOTONIC, 70 * 24 * 3600,92 CLOCK_BOOTTIME, 9 * 24 * 3600);93 fd = open("/proc/self/timens_offsets", O_WRONLY);94 if (fd < 0)95 return pr_perror("/proc/self/timens_offsets");96 97 if (write(fd, buf, len) != len)98 return pr_perror("/proc/self/timens_offsets");99 100 close(fd);101 mtime_now.tv_sec += 70 * 24 * 3600;102 btime_now.tv_sec += 9 * 24 * 3600;103 104 pid = fork();105 if (pid < 0)106 return pr_perror("Unable to fork");107 if (pid == 0) {108 ret = 0;109 ret |= run_test(CLOCK_BOOTTIME, btime_now);110 ret |= run_test(CLOCK_MONOTONIC, mtime_now);111 ret |= run_test(CLOCK_BOOTTIME_ALARM, btime_now);112 113 if (ret)114 ksft_exit_fail();115 ksft_exit_pass();116 return ret;117 }118 119 if (waitpid(pid, &status, 0) != pid)120 return pr_perror("Unable to wait the child process");121 122 if (WIFEXITED(status))123 return WEXITSTATUS(status);124 125 return 1;126}127