1 // SPDX-License-Identifier: GPL-2.0 2 #define _GNU_SOURCE 3 #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 18 int 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 71 int 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