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-rw-r--r--tools/testing/selftests/timens/timens.h111
1 files changed, 111 insertions, 0 deletions
diff --git a/tools/testing/selftests/timens/timens.h b/tools/testing/selftests/timens/timens.h
new file mode 100644
index 000000000..d4fc52d47
--- /dev/null
+++ b/tools/testing/selftests/timens/timens.h
@@ -0,0 +1,111 @@
+/* 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