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