1
2#define _GNU_SOURCE
3#include <sched.h>
4
5#include <sys/timerfd.h>
6#include <sys/syscall.h>
7#include <sys/types.h>
8#include <sys/wait.h>
9#include <time.h>
10#include <unistd.h>
11#include <stdlib.h>
12#include <stdio.h>
13#include <stdint.h>
14
15#include "log.h"
16#include "timens.h"
17
18static int tclock_gettime(clock_t clockid, struct timespec *now)
19{
20 if (clockid == CLOCK_BOOTTIME_ALARM)
21 clockid = CLOCK_BOOTTIME;
22 return clock_gettime(clockid, now);
23}
24
25int run_test(int clockid, struct timespec now)
26{
27 struct itimerspec new_value;
28 long long elapsed;
29 int fd, i;
30
31 if (check_skip(clockid))
32 return 0;
33
34 if (tclock_gettime(clockid, &now))
35 return pr_perror("clock_gettime(%d)", clockid);
36
37 for (i = 0; i < 2; i++) {
38 int flags = 0;
39
40 new_value.it_value.tv_sec = 3600;
41 new_value.it_value.tv_nsec = 0;
42 new_value.it_interval.tv_sec = 1;
43 new_value.it_interval.tv_nsec = 0;
44
45 if (i == 1) {
46 new_value.it_value.tv_sec += now.tv_sec;
47 new_value.it_value.tv_nsec += now.tv_nsec;
48 }
49
50 fd = timerfd_create(clockid, 0);
51 if (fd == -1)
52 return pr_perror("timerfd_create(%d)", clockid);
53
54 if (i == 1)
55 flags |= TFD_TIMER_ABSTIME;
56
57 if (timerfd_settime(fd, flags, &new_value, NULL))
58 return pr_perror("timerfd_settime(%d)", clockid);
59
60 if (timerfd_gettime(fd, &new_value))
61 return pr_perror("timerfd_gettime(%d)", clockid);
62
63 elapsed = new_value.it_value.tv_sec;
64 if (abs(elapsed - 3600) > 60) {
65 ksft_test_result_fail("clockid: %d elapsed: %lld\n",
66 clockid, elapsed);
67 return 1;
68 }
69
70 close(fd);
71 }
72
73 ksft_test_result_pass("clockid=%d\n", clockid);
74
75 return 0;
76}
77
78int main(int argc, char *argv[])
79{
80 int ret, status, len, fd;
81 char buf[4096];
82 pid_t pid;
83 struct timespec btime_now, mtime_now;
84
85 nscheck();
86
87 check_supported_timers();
88
89 ksft_set_plan(3);
90
91 clock_gettime(CLOCK_MONOTONIC, &mtime_now);
92 clock_gettime(CLOCK_BOOTTIME, &btime_now);
93
94 if (unshare_timens())
95 return 1;
96
97 len = snprintf(buf, sizeof(buf), "%d %d 0\n%d %d 0",
98 CLOCK_MONOTONIC, 70 * 24 * 3600,
99 CLOCK_BOOTTIME, 9 * 24 * 3600);
100 fd = open("/proc/self/timens_offsets", O_WRONLY);
101 if (fd < 0)
102 return pr_perror("/proc/self/timens_offsets");
103
104 if (write(fd, buf, len) != len)
105 return pr_perror("/proc/self/timens_offsets");
106
107 close(fd);
108 mtime_now.tv_sec += 70 * 24 * 3600;
109 btime_now.tv_sec += 9 * 24 * 3600;
110
111 pid = fork();
112 if (pid < 0)
113 return pr_perror("Unable to fork");
114 if (pid == 0) {
115 ret = 0;
116 ret |= run_test(CLOCK_BOOTTIME, btime_now);
117 ret |= run_test(CLOCK_MONOTONIC, mtime_now);
118 ret |= run_test(CLOCK_BOOTTIME_ALARM, btime_now);
119
120 if (ret)
121 ksft_exit_fail();
122 ksft_exit_pass();
123 return ret;
124 }
125
126 if (waitpid(pid, &status, 0) != pid)
127 return pr_perror("Unable to wait the child process");
128
129 if (WIFEXITED(status))
130 return WEXITSTATUS(status);
131
132 return 1;
133}
134
