1 // SPDX-License-Identifier: GPL-2.0 2 #define _GNU_SOURCE 3 #include <sched.h> 4 5 #include <sys/timerfd.h> 6 #include <sys/syscall.h> 7 #include <sys/types.h> 8 #include <sys/wait.h> 9 #include <time.h> 10 #include <unistd.h> 11 #include <stdlib.h> 12 #include <stdio.h> 13 #include <stdint.h> 14 15 #include "log.h" 16 #include "timens.h" 17 18 static int tclock_gettime(clock_t clockid, struct timespec *now) 19 { 20 if (clockid == CLOCK_BOOTTIME_ALARM) 21 clockid = CLOCK_BOOTTIME; 22 return clock_gettime(clockid, now); 23 } 24 25 int run_test(int clockid, struct timespec now) 26 { 27 struct itimerspec new_value; 28 long long elapsed; 29 int fd, i; 30 31 if (check_skip(clockid)) 32 return 0; 33 34 if (tclock_gettime(clockid, &now)) 35 return pr_perror("clock_gettime(%d)", clockid); 36 37 for (i = 0; i < 2; i++) { 38 int flags = 0; 39 40 new_value.it_value.tv_sec = 3600; 41 new_value.it_value.tv_nsec = 0; 42 new_value.it_interval.tv_sec = 1; 43 new_value.it_interval.tv_nsec = 0; 44 45 if (i == 1) { 46 new_value.it_value.tv_sec += now.tv_sec; 47 new_value.it_value.tv_nsec += now.tv_nsec; 48 } 49 50 fd = timerfd_create(clockid, 0); 51 if (fd == -1) 52 return pr_perror("timerfd_create(%d)", clockid); 53 54 if (i == 1) 55 flags |= TFD_TIMER_ABSTIME; 56 57 if (timerfd_settime(fd, flags, &new_value, NULL)) 58 return pr_perror("timerfd_settime(%d)", clockid); 59 60 if (timerfd_gettime(fd, &new_value)) 61 return pr_perror("timerfd_gettime(%d)", clockid); 62 63 elapsed = new_value.it_value.tv_sec; 64 if (llabs(elapsed - 3600) > 60) { 65 ksft_test_result_fail("clockid: %d elapsed: %lld\n", 66 clockid, elapsed); 67 return 1; 68 } 69 70 close(fd); 71 } 72 73 ksft_test_result_pass("clockid=%d\n", clockid); 74 75 return 0; 76 } 77 78 int main(int argc, char *argv[]) 79 { 80 int ret, status, len, fd; 81 char buf[4096]; 82 pid_t pid; 83 struct timespec btime_now, mtime_now; 84 85 nscheck(); 86 87 check_supported_timers(); 88 89 ksft_set_plan(3); 90 91 clock_gettime(CLOCK_MONOTONIC, &mtime_now); 92 clock_gettime(CLOCK_BOOTTIME, &btime_now); 93 94 if (unshare_timens()) 95 return 1; 96 97 len = snprintf(buf, sizeof(buf), "%d %d 0\n%d %d 0", 98 CLOCK_MONOTONIC, 70 * 24 * 3600, 99 CLOCK_BOOTTIME, 9 * 24 * 3600); 100 fd = open("/proc/self/timens_offsets", O_WRONLY); 101 if (fd < 0) 102 return pr_perror("/proc/self/timens_offsets"); 103 104 if (write(fd, buf, len) != len) 105 return pr_perror("/proc/self/timens_offsets"); 106 107 close(fd); 108 mtime_now.tv_sec += 70 * 24 * 3600; 109 btime_now.tv_sec += 9 * 24 * 3600; 110 111 pid = fork(); 112 if (pid < 0) 113 return pr_perror("Unable to fork"); 114 if (pid == 0) { 115 ret = 0; 116 ret |= run_test(CLOCK_BOOTTIME, btime_now); 117 ret |= run_test(CLOCK_MONOTONIC, mtime_now); 118 ret |= run_test(CLOCK_BOOTTIME_ALARM, btime_now); 119 120 if (ret) 121 ksft_exit_fail(); 122 ksft_exit_pass(); 123 return ret; 124 } 125 126 if (waitpid(pid, &status, 0) != pid) 127 return pr_perror("Unable to wait the child process"); 128 129 if (WIFEXITED(status)) 130 return WEXITSTATUS(status); 131 132 return 1; 133 } 134