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#include <time.h>
15
16#include "log.h"
17#include "timens.h"
18
19int run_test(int clockid, struct timespec now)
20{
21 struct itimerspec new_value;
22 long long elapsed;
23 timer_t fd;
24 int i;
25
26 for (i = 0; i < 2; i++) {
27 struct sigevent sevp = {.sigev_notify = SIGEV_NONE};
28 int flags = 0;
29
30 new_value.it_value.tv_sec = 3600;
31 new_value.it_value.tv_nsec = 0;
32 new_value.it_interval.tv_sec = 1;
33 new_value.it_interval.tv_nsec = 0;
34
35 if (i == 1) {
36 new_value.it_value.tv_sec += now.tv_sec;
37 new_value.it_value.tv_nsec += now.tv_nsec;
38 }
39
40 if (timer_create(clockid, &sevp, &fd) == -1) {
41 if (errno == ENOSYS) {
42 ksft_test_result_skip("Posix Clocks & timers are supported\n");
43 return 0;
44 }
45 return pr_perror("timerfd_create");
46 }
47
48 if (i == 1)
49 flags |= TIMER_ABSTIME;
50 if (timer_settime(fd, flags, &new_value, NULL) == -1)
51 return pr_perror("timerfd_settime");
52
53 if (timer_gettime(fd, &new_value) == -1)
54 return pr_perror("timerfd_gettime");
55
56 elapsed = new_value.it_value.tv_sec;
57 if (abs(elapsed - 3600) > 60) {
58 ksft_test_result_fail("clockid: %d elapsed: %lld\n",
59 clockid, elapsed);
60 return 1;
61 }
62 }
63
64 ksft_test_result_pass("clockid=%d\n", clockid);
65
66 return 0;
67}
68
69int main(int argc, char *argv[])
70{
71 int ret, status, len, fd;
72 char buf[4096];
73 pid_t pid;
74 struct timespec btime_now, mtime_now;
75
76 nscheck();
77
78 ksft_set_plan(3);
79
80 clock_gettime(CLOCK_MONOTONIC, &mtime_now);
81 clock_gettime(CLOCK_BOOTTIME, &btime_now);
82
83 if (unshare_timens())
84 return 1;
85
86 len = snprintf(buf, sizeof(buf), "%d %d 0\n%d %d 0",
87 CLOCK_MONOTONIC, 70 * 24 * 3600,
88 CLOCK_BOOTTIME, 9 * 24 * 3600);
89 fd = open("/proc/self/timens_offsets", O_WRONLY);
90 if (fd < 0)
91 return pr_perror("/proc/self/timens_offsets");
92
93 if (write(fd, buf, len) != len)
94 return pr_perror("/proc/self/timens_offsets");
95
96 close(fd);
97 mtime_now.tv_sec += 70 * 24 * 3600;
98 btime_now.tv_sec += 9 * 24 * 3600;
99
100 pid = fork();
101 if (pid < 0)
102 return pr_perror("Unable to fork");
103 if (pid == 0) {
104 ret = 0;
105 ret |= run_test(CLOCK_BOOTTIME, btime_now);
106 ret |= run_test(CLOCK_MONOTONIC, mtime_now);
107 ret |= run_test(CLOCK_BOOTTIME_ALARM, btime_now);
108
109 if (ret)
110 ksft_exit_fail();
111 ksft_exit_pass();
112 return ret;
113 }
114
115 if (waitpid(pid, &status, 0) != pid)
116 return pr_perror("Unable to wait the child process");
117
118 if (WIFEXITED(status))
119 return WEXITSTATUS(status);
120
121 return 1;
122}