Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2#define _GNU_SOURCE
3#include <sched.h>
4
5#include <sys/syscall.h>
6#include <sys/types.h>
7#include <sys/wait.h>
8#include <time.h>
9#include <unistd.h>
10#include <stdlib.h>
11#include <stdio.h>
12#include <stdint.h>
13#include <signal.h>
14
15#include "log.h"
16#include "timens.h"
17
18int run_test(int clockid, struct timespec now)
19{
20 struct itimerspec new_value;
21 long long elapsed;
22 timer_t fd;
23 int i;
24
25 for (i = 0; i < 2; i++) {
26 struct sigevent sevp = {.sigev_notify = SIGEV_NONE};
27 int flags = 0;
28
29 new_value.it_value.tv_sec = 3600;
30 new_value.it_value.tv_nsec = 0;
31 new_value.it_interval.tv_sec = 1;
32 new_value.it_interval.tv_nsec = 0;
33
34 if (i == 1) {
35 new_value.it_value.tv_sec += now.tv_sec;
36 new_value.it_value.tv_nsec += now.tv_nsec;
37 }
38
39 if (timer_create(clockid, &sevp, &fd) == -1) {
40 if (errno == ENOSYS) {
41 ksft_test_result_skip("Posix Clocks & timers are supported\n");
42 return 0;
43 }
44 return pr_perror("timerfd_create");
45 }
46
47 if (i == 1)
48 flags |= TIMER_ABSTIME;
49 if (timer_settime(fd, flags, &new_value, NULL) == -1)
50 return pr_perror("timerfd_settime");
51
52 if (timer_gettime(fd, &new_value) == -1)
53 return pr_perror("timerfd_gettime");
54
55 elapsed = new_value.it_value.tv_sec;
56 if (abs(elapsed - 3600) > 60) {
57 ksft_test_result_fail("clockid: %d elapsed: %lld\n",
58 clockid, elapsed);
59 return 1;
60 }
61 }
62
63 ksft_test_result_pass("clockid=%d\n", clockid);
64
65 return 0;
66}
67
68int main(int argc, char *argv[])
69{
70 int ret, status, len, fd;
71 char buf[4096];
72 pid_t pid;
73 struct timespec btime_now, mtime_now;
74
75 nscheck();
76
77 ksft_set_plan(3);
78
79 clock_gettime(CLOCK_MONOTONIC, &mtime_now);
80 clock_gettime(CLOCK_BOOTTIME, &btime_now);
81
82 if (unshare_timens())
83 return 1;
84
85 len = snprintf(buf, sizeof(buf), "%d %d 0\n%d %d 0",
86 CLOCK_MONOTONIC, 70 * 24 * 3600,
87 CLOCK_BOOTTIME, 9 * 24 * 3600);
88 fd = open("/proc/self/timens_offsets", O_WRONLY);
89 if (fd < 0)
90 return pr_perror("/proc/self/timens_offsets");
91
92 if (write(fd, buf, len) != len)
93 return pr_perror("/proc/self/timens_offsets");
94
95 close(fd);
96 mtime_now.tv_sec += 70 * 24 * 3600;
97 btime_now.tv_sec += 9 * 24 * 3600;
98
99 pid = fork();
100 if (pid < 0)
101 return pr_perror("Unable to fork");
102 if (pid == 0) {
103 ret = 0;
104 ret |= run_test(CLOCK_BOOTTIME, btime_now);
105 ret |= run_test(CLOCK_MONOTONIC, mtime_now);
106 ret |= run_test(CLOCK_BOOTTIME_ALARM, btime_now);
107
108 if (ret)
109 ksft_exit_fail();
110 ksft_exit_pass();
111 return ret;
112 }
113
114 if (waitpid(pid, &status, 0) != pid)
115 return pr_perror("Unable to wait the child process");
116
117 if (WIFEXITED(status))
118 return WEXITSTATUS(status);
119
120 return 1;
121}