1 | // SPDX-License-Identifier: GPL-2.0 |
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 | |
18 | static 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 | |
25 | int 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(msg: "clockid: %d elapsed: %lld\n" , |
66 | clockid, elapsed); |
67 | return 1; |
68 | } |
69 | |
70 | close(fd); |
71 | } |
72 | |
73 | ksft_test_result_pass(msg: "clockid=%d\n" , clockid); |
74 | |
75 | return 0; |
76 | } |
77 | |
78 | int 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(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(clockid: CLOCK_BOOTTIME, now: btime_now); |
117 | ret |= run_test(clockid: CLOCK_MONOTONIC, now: mtime_now); |
118 | ret |= run_test(clockid: CLOCK_BOOTTIME_ALARM, now: 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 | |