// 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(clockid_t clockid, struct timespec *now) { if (clockid == CLOCK_BOOTTIME_ALARM) clockid = CLOCK_BOOTTIME; return clock_gettime(clockid, now); } static 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; ksft_print_header(); 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; }