/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __TIMENS_H__ #define __TIMENS_H__ #include <fcntl.h> #include <unistd.h> #include <stdlib.h> #include <stdbool.h> #include "../kselftest.h" #ifndef CLONE_NEWTIME # define CLONE_NEWTIME 0x00000080 #endif static int config_posix_timers = true; static int config_alarm_timers = true; static inline void check_supported_timers(void) { struct timespec ts; if (timer_create(-1, 0, 0) == -1 && errno == ENOSYS) config_posix_timers = false; if (clock_gettime(CLOCK_BOOTTIME_ALARM, &ts) == -1 && errno == EINVAL) config_alarm_timers = false; } static inline bool check_skip(int clockid) { if (!config_alarm_timers && clockid == CLOCK_BOOTTIME_ALARM) { ksft_test_result_skip("CLOCK_BOOTTIME_ALARM isn't supported\n"); return true; } if (config_posix_timers) return false; switch (clockid) { /* Only these clocks are supported without CONFIG_POSIX_TIMERS. */ case CLOCK_BOOTTIME: case CLOCK_MONOTONIC: case CLOCK_REALTIME: return false; default: ksft_test_result_skip("Posix Clocks & timers are not supported\n"); return true; } return false; } static inline int unshare_timens(void) { if (unshare(CLONE_NEWTIME)) { if (errno == EPERM) ksft_exit_skip("need to run as root\n"); return pr_perror("Can't unshare() timens"); } return 0; } static inline int _settime(clockid_t clk_id, time_t offset) { int fd, len; char buf[4096]; if (clk_id == CLOCK_MONOTONIC_COARSE || clk_id == CLOCK_MONOTONIC_RAW) clk_id = CLOCK_MONOTONIC; len = snprintf(buf, sizeof(buf), "%d %ld 0", clk_id, offset); 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); return 0; } static inline int _gettime(clockid_t clk_id, struct timespec *res, bool raw_syscall) { int err; if (!raw_syscall) { if (clock_gettime(clk_id, res)) { pr_perror("clock_gettime(%d)", (int)clk_id); return -1; } return 0; } err = syscall(SYS_clock_gettime, clk_id, res); if (err) pr_perror("syscall(SYS_clock_gettime(%d))", (int)clk_id); return err; } static inline void nscheck(void) { if (access("/proc/self/ns/time", F_OK) < 0) ksft_exit_skip("Time namespaces are not supported\n"); } #endif