Update Linux to v5.10.109
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz
Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/tools/testing/selftests/timens/.gitignore b/tools/testing/selftests/timens/.gitignore
new file mode 100644
index 0000000..2e43851
--- /dev/null
+++ b/tools/testing/selftests/timens/.gitignore
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+clock_nanosleep
+exec
+gettime_perf
+gettime_perf_cold
+procfs
+timens
+timer
+timerfd
diff --git a/tools/testing/selftests/timens/Makefile b/tools/testing/selftests/timens/Makefile
new file mode 100644
index 0000000..3a5936c
--- /dev/null
+++ b/tools/testing/selftests/timens/Makefile
@@ -0,0 +1,7 @@
+TEST_GEN_PROGS := timens timerfd timer clock_nanosleep procfs exec futex
+TEST_GEN_PROGS_EXTENDED := gettime_perf
+
+CFLAGS := -Wall -Werror -pthread
+LDLIBS := -lrt -ldl
+
+include ../lib.mk
diff --git a/tools/testing/selftests/timens/clock_nanosleep.c b/tools/testing/selftests/timens/clock_nanosleep.c
new file mode 100644
index 0000000..72d41b9
--- /dev/null
+++ b/tools/testing/selftests/timens/clock_nanosleep.c
@@ -0,0 +1,149 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#include <sched.h>
+
+#include <sys/timerfd.h>
+#include <sys/syscall.h>
+#include <time.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <pthread.h>
+#include <signal.h>
+#include <string.h>
+
+#include "log.h"
+#include "timens.h"
+
+void test_sig(int sig)
+{
+ if (sig == SIGUSR2)
+ pthread_exit(NULL);
+}
+
+struct thread_args {
+ struct timespec *now, *rem;
+ pthread_mutex_t *lock;
+ int clockid;
+ int abs;
+};
+
+void *call_nanosleep(void *_args)
+{
+ struct thread_args *args = _args;
+
+ clock_nanosleep(args->clockid, args->abs ? TIMER_ABSTIME : 0, args->now, args->rem);
+ pthread_mutex_unlock(args->lock);
+ return NULL;
+}
+
+int run_test(int clockid, int abs)
+{
+ struct timespec now = {}, rem;
+ struct thread_args args = { .now = &now, .rem = &rem, .clockid = clockid};
+ struct timespec start;
+ pthread_mutex_t lock;
+ pthread_t thread;
+ int j, ok, ret;
+
+ signal(SIGUSR1, test_sig);
+ signal(SIGUSR2, test_sig);
+
+ pthread_mutex_init(&lock, NULL);
+ pthread_mutex_lock(&lock);
+
+ if (clock_gettime(clockid, &start) == -1) {
+ if (errno == EINVAL && check_skip(clockid))
+ return 0;
+ return pr_perror("clock_gettime");
+ }
+
+
+ if (abs) {
+ now.tv_sec = start.tv_sec;
+ now.tv_nsec = start.tv_nsec;
+ }
+
+ now.tv_sec += 3600;
+ args.abs = abs;
+ args.lock = &lock;
+ ret = pthread_create(&thread, NULL, call_nanosleep, &args);
+ if (ret != 0) {
+ pr_err("Unable to create a thread: %s", strerror(ret));
+ return 1;
+ }
+
+ /* Wait when the thread will call clock_nanosleep(). */
+ ok = 0;
+ for (j = 0; j < 8; j++) {
+ /* The maximum timeout is about 5 seconds. */
+ usleep(10000 << j);
+
+ /* Try to interrupt clock_nanosleep(). */
+ pthread_kill(thread, SIGUSR1);
+
+ usleep(10000 << j);
+ /* Check whether clock_nanosleep() has been interrupted or not. */
+ if (pthread_mutex_trylock(&lock) == 0) {
+ /**/
+ ok = 1;
+ break;
+ }
+ }
+ if (!ok)
+ pthread_kill(thread, SIGUSR2);
+ pthread_join(thread, NULL);
+ pthread_mutex_destroy(&lock);
+
+ if (!ok) {
+ ksft_test_result_pass("clockid: %d abs:%d timeout\n", clockid, abs);
+ return 1;
+ }
+
+ if (rem.tv_sec < 3300 || rem.tv_sec > 3900) {
+ pr_fail("clockid: %d abs: %d remain: %ld\n",
+ clockid, abs, rem.tv_sec);
+ return 1;
+ }
+ ksft_test_result_pass("clockid: %d abs:%d\n", clockid, abs);
+
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ int ret, nsfd;
+
+ nscheck();
+
+ ksft_set_plan(4);
+
+ check_supported_timers();
+
+ if (unshare_timens())
+ return 1;
+
+ if (_settime(CLOCK_MONOTONIC, 7 * 24 * 3600))
+ return 1;
+ if (_settime(CLOCK_BOOTTIME, 9 * 24 * 3600))
+ return 1;
+
+ nsfd = open("/proc/self/ns/time_for_children", O_RDONLY);
+ if (nsfd < 0)
+ return pr_perror("Unable to open timens_for_children");
+
+ if (setns(nsfd, CLONE_NEWTIME))
+ return pr_perror("Unable to set timens");
+
+ ret = 0;
+ ret |= run_test(CLOCK_MONOTONIC, 0);
+ ret |= run_test(CLOCK_MONOTONIC, 1);
+ ret |= run_test(CLOCK_BOOTTIME_ALARM, 0);
+ ret |= run_test(CLOCK_BOOTTIME_ALARM, 1);
+
+ if (ret)
+ ksft_exit_fail();
+ ksft_exit_pass();
+ return ret;
+}
diff --git a/tools/testing/selftests/timens/config b/tools/testing/selftests/timens/config
new file mode 100644
index 0000000..4480620
--- /dev/null
+++ b/tools/testing/selftests/timens/config
@@ -0,0 +1 @@
+CONFIG_TIME_NS=y
diff --git a/tools/testing/selftests/timens/exec.c b/tools/testing/selftests/timens/exec.c
new file mode 100644
index 0000000..e40dc5b
--- /dev/null
+++ b/tools/testing/selftests/timens/exec.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#include <errno.h>
+#include <fcntl.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "log.h"
+#include "timens.h"
+
+#define OFFSET (36000)
+
+int main(int argc, char *argv[])
+{
+ struct timespec now, tst;
+ int status, i;
+ pid_t pid;
+
+ if (argc > 1) {
+ if (sscanf(argv[1], "%ld", &now.tv_sec) != 1)
+ return pr_perror("sscanf");
+
+ for (i = 0; i < 2; i++) {
+ _gettime(CLOCK_MONOTONIC, &tst, i);
+ if (abs(tst.tv_sec - now.tv_sec) > 5)
+ return pr_fail("%ld %ld\n", now.tv_sec, tst.tv_sec);
+ }
+ return 0;
+ }
+
+ nscheck();
+
+ ksft_set_plan(1);
+
+ clock_gettime(CLOCK_MONOTONIC, &now);
+
+ if (unshare_timens())
+ return 1;
+
+ if (_settime(CLOCK_MONOTONIC, OFFSET))
+ return 1;
+
+ for (i = 0; i < 2; i++) {
+ _gettime(CLOCK_MONOTONIC, &tst, i);
+ if (abs(tst.tv_sec - now.tv_sec) > 5)
+ return pr_fail("%ld %ld\n",
+ now.tv_sec, tst.tv_sec);
+ }
+
+ if (argc > 1)
+ return 0;
+
+ pid = fork();
+ if (pid < 0)
+ return pr_perror("fork");
+
+ if (pid == 0) {
+ char now_str[64];
+ char *cargv[] = {"exec", now_str, NULL};
+ char *cenv[] = {NULL};
+
+ /* Check that a child process is in the new timens. */
+ for (i = 0; i < 2; i++) {
+ _gettime(CLOCK_MONOTONIC, &tst, i);
+ if (abs(tst.tv_sec - now.tv_sec - OFFSET) > 5)
+ return pr_fail("%ld %ld\n",
+ now.tv_sec + OFFSET, tst.tv_sec);
+ }
+
+ /* Check for proper vvar offsets after execve. */
+ snprintf(now_str, sizeof(now_str), "%ld", now.tv_sec + OFFSET);
+ execve("/proc/self/exe", cargv, cenv);
+ return pr_perror("execve");
+ }
+
+ if (waitpid(pid, &status, 0) != pid)
+ return pr_perror("waitpid");
+
+ if (status)
+ ksft_exit_fail();
+
+ ksft_test_result_pass("exec\n");
+ ksft_exit_pass();
+ return 0;
+}
diff --git a/tools/testing/selftests/timens/futex.c b/tools/testing/selftests/timens/futex.c
new file mode 100644
index 0000000..6b2b926
--- /dev/null
+++ b/tools/testing/selftests/timens/futex.c
@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#include <sched.h>
+
+#include <linux/unistd.h>
+#include <linux/futex.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "log.h"
+#include "timens.h"
+
+#define NSEC_PER_SEC 1000000000ULL
+
+static int run_test(int clockid)
+{
+ int futex_op = FUTEX_WAIT_BITSET;
+ struct timespec timeout, end;
+ int val = 0;
+
+ if (clockid == CLOCK_REALTIME)
+ futex_op |= FUTEX_CLOCK_REALTIME;
+
+ clock_gettime(clockid, &timeout);
+ timeout.tv_nsec += NSEC_PER_SEC / 10; // 100ms
+ if (timeout.tv_nsec > NSEC_PER_SEC) {
+ timeout.tv_sec++;
+ timeout.tv_nsec -= NSEC_PER_SEC;
+ }
+
+ if (syscall(__NR_futex, &val, futex_op, 0,
+ &timeout, 0, FUTEX_BITSET_MATCH_ANY) >= 0) {
+ ksft_test_result_fail("futex didn't return ETIMEDOUT\n");
+ return 1;
+ }
+
+ if (errno != ETIMEDOUT) {
+ ksft_test_result_fail("futex didn't return ETIMEDOUT: %s\n",
+ strerror(errno));
+ return 1;
+ }
+
+ clock_gettime(clockid, &end);
+
+ if (end.tv_sec < timeout.tv_sec ||
+ (end.tv_sec == timeout.tv_sec && end.tv_nsec < timeout.tv_nsec)) {
+ ksft_test_result_fail("futex slept less than 100ms\n");
+ return 1;
+ }
+
+
+ ksft_test_result_pass("futex with the %d clockid\n", clockid);
+
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ int status, len, fd;
+ char buf[4096];
+ pid_t pid;
+ struct timespec mtime_now;
+
+ nscheck();
+
+ ksft_set_plan(2);
+
+ clock_gettime(CLOCK_MONOTONIC, &mtime_now);
+
+ if (unshare_timens())
+ return 1;
+
+ len = snprintf(buf, sizeof(buf), "%d %d 0",
+ CLOCK_MONOTONIC, 70 * 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);
+
+ pid = fork();
+ if (pid < 0)
+ return pr_perror("Unable to fork");
+ if (pid == 0) {
+ int ret = 0;
+
+ ret |= run_test(CLOCK_REALTIME);
+ ret |= run_test(CLOCK_MONOTONIC);
+ if (ret)
+ ksft_exit_fail();
+ ksft_exit_pass();
+ return 0;
+ }
+
+ if (waitpid(pid, &status, 0) != pid)
+ return pr_perror("Unable to wait the child process");
+
+ if (WIFEXITED(status))
+ return WEXITSTATUS(status);
+
+ return 1;
+}
diff --git a/tools/testing/selftests/timens/gettime_perf.c b/tools/testing/selftests/timens/gettime_perf.c
new file mode 100644
index 0000000..7bf841a
--- /dev/null
+++ b/tools/testing/selftests/timens/gettime_perf.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sched.h>
+#include <time.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <dlfcn.h>
+
+#include "log.h"
+#include "timens.h"
+
+typedef int (*vgettime_t)(clockid_t, struct timespec *);
+
+vgettime_t vdso_clock_gettime;
+
+static void fill_function_pointers(void)
+{
+ void *vdso = dlopen("linux-vdso.so.1",
+ RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD);
+ if (!vdso)
+ vdso = dlopen("linux-gate.so.1",
+ RTLD_LAZY | RTLD_LOCAL | RTLD_NOLOAD);
+ if (!vdso) {
+ pr_err("[WARN]\tfailed to find vDSO\n");
+ return;
+ }
+
+ vdso_clock_gettime = (vgettime_t)dlsym(vdso, "__vdso_clock_gettime");
+ if (!vdso_clock_gettime)
+ pr_err("Warning: failed to find clock_gettime in vDSO\n");
+
+}
+
+static void test(clock_t clockid, char *clockstr, bool in_ns)
+{
+ struct timespec tp, start;
+ long i = 0;
+ const int timeout = 3;
+
+ vdso_clock_gettime(clockid, &start);
+ tp = start;
+ for (tp = start; start.tv_sec + timeout > tp.tv_sec ||
+ (start.tv_sec + timeout == tp.tv_sec &&
+ start.tv_nsec > tp.tv_nsec); i++) {
+ vdso_clock_gettime(clockid, &tp);
+ }
+
+ ksft_test_result_pass("%s:\tclock: %10s\tcycles:\t%10ld\n",
+ in_ns ? "ns" : "host", clockstr, i);
+}
+
+int main(int argc, char *argv[])
+{
+ time_t offset = 10;
+ int nsfd;
+
+ ksft_set_plan(8);
+
+ fill_function_pointers();
+
+ test(CLOCK_MONOTONIC, "monotonic", false);
+ test(CLOCK_MONOTONIC_COARSE, "monotonic-coarse", false);
+ test(CLOCK_MONOTONIC_RAW, "monotonic-raw", false);
+ test(CLOCK_BOOTTIME, "boottime", false);
+
+ nscheck();
+
+ if (unshare_timens())
+ return 1;
+
+ nsfd = open("/proc/self/ns/time_for_children", O_RDONLY);
+ if (nsfd < 0)
+ return pr_perror("Can't open a time namespace");
+
+ if (_settime(CLOCK_MONOTONIC, offset))
+ return 1;
+ if (_settime(CLOCK_BOOTTIME, offset))
+ return 1;
+
+ if (setns(nsfd, CLONE_NEWTIME))
+ return pr_perror("setns");
+
+ test(CLOCK_MONOTONIC, "monotonic", true);
+ test(CLOCK_MONOTONIC_COARSE, "monotonic-coarse", true);
+ test(CLOCK_MONOTONIC_RAW, "monotonic-raw", true);
+ test(CLOCK_BOOTTIME, "boottime", true);
+
+ ksft_exit_pass();
+ return 0;
+}
diff --git a/tools/testing/selftests/timens/log.h b/tools/testing/selftests/timens/log.h
new file mode 100644
index 0000000..db64df2
--- /dev/null
+++ b/tools/testing/selftests/timens/log.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __SELFTEST_TIMENS_LOG_H__
+#define __SELFTEST_TIMENS_LOG_H__
+
+#define pr_msg(fmt, lvl, ...) \
+ ksft_print_msg("[%s] (%s:%d)\t" fmt "\n", \
+ lvl, __FILE__, __LINE__, ##__VA_ARGS__)
+
+#define pr_p(func, fmt, ...) func(fmt ": %m", ##__VA_ARGS__)
+
+#define pr_err(fmt, ...) \
+ ({ \
+ ksft_test_result_error(fmt "\n", ##__VA_ARGS__); \
+ -1; \
+ })
+
+#define pr_fail(fmt, ...) \
+ ({ \
+ ksft_test_result_fail(fmt, ##__VA_ARGS__); \
+ -1; \
+ })
+
+#define pr_perror(fmt, ...) pr_p(pr_err, fmt, ##__VA_ARGS__)
+
+#endif
diff --git a/tools/testing/selftests/timens/procfs.c b/tools/testing/selftests/timens/procfs.c
new file mode 100644
index 0000000..7f14f0f
--- /dev/null
+++ b/tools/testing/selftests/timens/procfs.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#include <errno.h>
+#include <fcntl.h>
+#include <math.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "log.h"
+#include "timens.h"
+
+/*
+ * Test shouldn't be run for a day, so add 10 days to child
+ * time and check parent's time to be in the same day.
+ */
+#define MAX_TEST_TIME_SEC (60*5)
+#define DAY_IN_SEC (60*60*24)
+#define TEN_DAYS_IN_SEC (10*DAY_IN_SEC)
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+static int child_ns, parent_ns;
+
+static int switch_ns(int fd)
+{
+ if (setns(fd, CLONE_NEWTIME))
+ return pr_perror("setns()");
+
+ return 0;
+}
+
+static int init_namespaces(void)
+{
+ char path[] = "/proc/self/ns/time_for_children";
+ struct stat st1, st2;
+
+ parent_ns = open(path, O_RDONLY);
+ if (parent_ns <= 0)
+ return pr_perror("Unable to open %s", path);
+
+ if (fstat(parent_ns, &st1))
+ return pr_perror("Unable to stat the parent timens");
+
+ if (unshare_timens())
+ return -1;
+
+ child_ns = open(path, O_RDONLY);
+ if (child_ns <= 0)
+ return pr_perror("Unable to open %s", path);
+
+ if (fstat(child_ns, &st2))
+ return pr_perror("Unable to stat the timens");
+
+ if (st1.st_ino == st2.st_ino)
+ return pr_err("The same child_ns after CLONE_NEWTIME");
+
+ if (_settime(CLOCK_BOOTTIME, TEN_DAYS_IN_SEC))
+ return -1;
+
+ return 0;
+}
+
+static int read_proc_uptime(struct timespec *uptime)
+{
+ unsigned long up_sec, up_nsec;
+ FILE *proc;
+
+ proc = fopen("/proc/uptime", "r");
+ if (proc == NULL) {
+ pr_perror("Unable to open /proc/uptime");
+ return -1;
+ }
+
+ if (fscanf(proc, "%lu.%02lu", &up_sec, &up_nsec) != 2) {
+ if (errno) {
+ pr_perror("fscanf");
+ return -errno;
+ }
+ pr_err("failed to parse /proc/uptime");
+ return -1;
+ }
+ fclose(proc);
+
+ uptime->tv_sec = up_sec;
+ uptime->tv_nsec = up_nsec;
+ return 0;
+}
+
+static int check_uptime(void)
+{
+ struct timespec uptime_new, uptime_old;
+ time_t uptime_expected;
+ double prec = MAX_TEST_TIME_SEC;
+
+ if (switch_ns(parent_ns))
+ return pr_err("switch_ns(%d)", parent_ns);
+
+ if (read_proc_uptime(&uptime_old))
+ return 1;
+
+ if (switch_ns(child_ns))
+ return pr_err("switch_ns(%d)", child_ns);
+
+ if (read_proc_uptime(&uptime_new))
+ return 1;
+
+ uptime_expected = uptime_old.tv_sec + TEN_DAYS_IN_SEC;
+ if (fabs(difftime(uptime_new.tv_sec, uptime_expected)) > prec) {
+ pr_fail("uptime in /proc/uptime: old %ld, new %ld [%ld]",
+ uptime_old.tv_sec, uptime_new.tv_sec,
+ uptime_old.tv_sec + TEN_DAYS_IN_SEC);
+ return 1;
+ }
+
+ ksft_test_result_pass("Passed for /proc/uptime\n");
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ int ret = 0;
+
+ nscheck();
+
+ ksft_set_plan(1);
+
+ if (init_namespaces())
+ return 1;
+
+ ret |= check_uptime();
+
+ if (ret)
+ ksft_exit_fail();
+ ksft_exit_pass();
+ return ret;
+}
diff --git a/tools/testing/selftests/timens/timens.c b/tools/testing/selftests/timens/timens.c
new file mode 100644
index 0000000..52b6a11
--- /dev/null
+++ b/tools/testing/selftests/timens/timens.c
@@ -0,0 +1,189 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#include <errno.h>
+#include <fcntl.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "log.h"
+#include "timens.h"
+
+/*
+ * Test shouldn't be run for a day, so add 10 days to child
+ * time and check parent's time to be in the same day.
+ */
+#define DAY_IN_SEC (60*60*24)
+#define TEN_DAYS_IN_SEC (10*DAY_IN_SEC)
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+struct test_clock {
+ clockid_t id;
+ char *name;
+ /*
+ * off_id is -1 if a clock has own offset, or it contains an index
+ * which contains a right offset of this clock.
+ */
+ int off_id;
+ time_t offset;
+};
+
+#define ct(clock, off_id) { clock, #clock, off_id }
+static struct test_clock clocks[] = {
+ ct(CLOCK_BOOTTIME, -1),
+ ct(CLOCK_BOOTTIME_ALARM, 1),
+ ct(CLOCK_MONOTONIC, -1),
+ ct(CLOCK_MONOTONIC_COARSE, 1),
+ ct(CLOCK_MONOTONIC_RAW, 1),
+};
+#undef ct
+
+static int child_ns, parent_ns = -1;
+
+static int switch_ns(int fd)
+{
+ if (setns(fd, CLONE_NEWTIME)) {
+ pr_perror("setns()");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int init_namespaces(void)
+{
+ char path[] = "/proc/self/ns/time_for_children";
+ struct stat st1, st2;
+
+ if (parent_ns == -1) {
+ parent_ns = open(path, O_RDONLY);
+ if (parent_ns <= 0)
+ return pr_perror("Unable to open %s", path);
+ }
+
+ if (fstat(parent_ns, &st1))
+ return pr_perror("Unable to stat the parent timens");
+
+ if (unshare_timens())
+ return -1;
+
+ child_ns = open(path, O_RDONLY);
+ if (child_ns <= 0)
+ return pr_perror("Unable to open %s", path);
+
+ if (fstat(child_ns, &st2))
+ return pr_perror("Unable to stat the timens");
+
+ if (st1.st_ino == st2.st_ino)
+ return pr_perror("The same child_ns after CLONE_NEWTIME");
+
+ return 0;
+}
+
+static int test_gettime(clockid_t clock_index, bool raw_syscall, time_t offset)
+{
+ struct timespec child_ts_new, parent_ts_old, cur_ts;
+ char *entry = raw_syscall ? "syscall" : "vdso";
+ double precision = 0.0;
+
+ if (check_skip(clocks[clock_index].id))
+ return 0;
+
+ switch (clocks[clock_index].id) {
+ case CLOCK_MONOTONIC_COARSE:
+ case CLOCK_MONOTONIC_RAW:
+ precision = -2.0;
+ break;
+ }
+
+ if (switch_ns(parent_ns))
+ return pr_err("switch_ns(%d)", child_ns);
+
+ if (_gettime(clocks[clock_index].id, &parent_ts_old, raw_syscall))
+ return -1;
+
+ child_ts_new.tv_nsec = parent_ts_old.tv_nsec;
+ child_ts_new.tv_sec = parent_ts_old.tv_sec + offset;
+
+ if (switch_ns(child_ns))
+ return pr_err("switch_ns(%d)", child_ns);
+
+ if (_gettime(clocks[clock_index].id, &cur_ts, raw_syscall))
+ return -1;
+
+ if (difftime(cur_ts.tv_sec, child_ts_new.tv_sec) < precision) {
+ ksft_test_result_fail(
+ "Child's %s (%s) time has not changed: %lu -> %lu [%lu]\n",
+ clocks[clock_index].name, entry, parent_ts_old.tv_sec,
+ child_ts_new.tv_sec, cur_ts.tv_sec);
+ return -1;
+ }
+
+ if (switch_ns(parent_ns))
+ return pr_err("switch_ns(%d)", parent_ns);
+
+ if (_gettime(clocks[clock_index].id, &cur_ts, raw_syscall))
+ return -1;
+
+ if (difftime(cur_ts.tv_sec, parent_ts_old.tv_sec) > DAY_IN_SEC) {
+ ksft_test_result_fail(
+ "Parent's %s (%s) time has changed: %lu -> %lu [%lu]\n",
+ clocks[clock_index].name, entry, parent_ts_old.tv_sec,
+ child_ts_new.tv_sec, cur_ts.tv_sec);
+ /* Let's play nice and put it closer to original */
+ clock_settime(clocks[clock_index].id, &cur_ts);
+ return -1;
+ }
+
+ ksft_test_result_pass("Passed for %s (%s)\n",
+ clocks[clock_index].name, entry);
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned int i;
+ time_t offset;
+ int ret = 0;
+
+ nscheck();
+
+ check_supported_timers();
+
+ ksft_set_plan(ARRAY_SIZE(clocks) * 2);
+
+ if (init_namespaces())
+ return 1;
+
+ /* Offsets have to be set before tasks enter the namespace. */
+ for (i = 0; i < ARRAY_SIZE(clocks); i++) {
+ if (clocks[i].off_id != -1)
+ continue;
+ offset = TEN_DAYS_IN_SEC + i * 1000;
+ clocks[i].offset = offset;
+ if (_settime(clocks[i].id, offset))
+ return 1;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(clocks); i++) {
+ if (clocks[i].off_id != -1)
+ offset = clocks[clocks[i].off_id].offset;
+ else
+ offset = clocks[i].offset;
+ ret |= test_gettime(i, true, offset);
+ ret |= test_gettime(i, false, offset);
+ }
+
+ if (ret)
+ ksft_exit_fail();
+
+ ksft_exit_pass();
+ return !!ret;
+}
diff --git a/tools/testing/selftests/timens/timens.h b/tools/testing/selftests/timens/timens.h
new file mode 100644
index 0000000..d4fc52d
--- /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
diff --git a/tools/testing/selftests/timens/timer.c b/tools/testing/selftests/timens/timer.c
new file mode 100644
index 0000000..5e7f005
--- /dev/null
+++ b/tools/testing/selftests/timens/timer.c
@@ -0,0 +1,126 @@
+// SPDX-License-Identifier: GPL-2.0
+#define _GNU_SOURCE
+#include <sched.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 <signal.h>
+
+#include "log.h"
+#include "timens.h"
+
+int run_test(int clockid, struct timespec now)
+{
+ struct itimerspec new_value;
+ long long elapsed;
+ timer_t fd;
+ int i;
+
+ if (check_skip(clockid))
+ return 0;
+
+ for (i = 0; i < 2; i++) {
+ struct sigevent sevp = {.sigev_notify = SIGEV_NONE};
+ 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;
+ }
+
+ if (timer_create(clockid, &sevp, &fd) == -1) {
+ if (errno == ENOSYS) {
+ ksft_test_result_skip("Posix Clocks & timers are supported\n");
+ return 0;
+ }
+ return pr_perror("timerfd_create");
+ }
+
+ if (i == 1)
+ flags |= TIMER_ABSTIME;
+ if (timer_settime(fd, flags, &new_value, NULL) == -1)
+ return pr_perror("timerfd_settime");
+
+ if (timer_gettime(fd, &new_value) == -1)
+ return pr_perror("timerfd_gettime");
+
+ elapsed = new_value.it_value.tv_sec;
+ if (abs(elapsed - 3600) > 60) {
+ ksft_test_result_fail("clockid: %d elapsed: %lld\n",
+ clockid, elapsed);
+ return 1;
+ }
+ }
+
+ 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;
+}
diff --git a/tools/testing/selftests/timens/timerfd.c b/tools/testing/selftests/timens/timerfd.c
new file mode 100644
index 0000000..9edd43d
--- /dev/null
+++ b/tools/testing/selftests/timens/timerfd.c
@@ -0,0 +1,133 @@
+// 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 (abs(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;
+}