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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 | // 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 (llabs(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; } |