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 <time.h> |
8 | #include <unistd.h> |
9 | #include <stdlib.h> |
10 | #include <stdio.h> |
11 | #include <stdint.h> |
12 | #include <pthread.h> |
13 | #include <signal.h> |
14 | #include <string.h> |
15 | |
16 | #include "log.h" |
17 | #include "timens.h" |
18 | |
19 | void test_sig(int sig) |
20 | { |
21 | if (sig == SIGUSR2) |
22 | pthread_exit(NULL); |
23 | } |
24 | |
25 | struct thread_args { |
26 | struct timespec *now, *rem; |
27 | pthread_mutex_t *lock; |
28 | int clockid; |
29 | int abs; |
30 | }; |
31 | |
32 | void *call_nanosleep(void *_args) |
33 | { |
34 | struct thread_args *args = _args; |
35 | |
36 | clock_nanosleep(args->clockid, args->abs ? TIMER_ABSTIME : 0, args->now, args->rem); |
37 | pthread_mutex_unlock(args->lock); |
38 | return NULL; |
39 | } |
40 | |
41 | int run_test(int clockid, int abs) |
42 | { |
43 | struct timespec now = {}, rem; |
44 | struct thread_args args = { .now = &now, .rem = &rem, .clockid = clockid}; |
45 | struct timespec start; |
46 | pthread_mutex_t lock; |
47 | pthread_t thread; |
48 | int j, ok, ret; |
49 | |
50 | signal(SIGUSR1, test_sig); |
51 | signal(SIGUSR2, test_sig); |
52 | |
53 | pthread_mutex_init(&lock, NULL); |
54 | pthread_mutex_lock(&lock); |
55 | |
56 | if (clock_gettime(clockid, &start) == -1) { |
57 | if (errno == EINVAL && check_skip(clockid)) |
58 | return 0; |
59 | return pr_perror("clock_gettime" ); |
60 | } |
61 | |
62 | |
63 | if (abs) { |
64 | now.tv_sec = start.tv_sec; |
65 | now.tv_nsec = start.tv_nsec; |
66 | } |
67 | |
68 | now.tv_sec += 3600; |
69 | args.abs = abs; |
70 | args.lock = &lock; |
71 | ret = pthread_create(&thread, NULL, call_nanosleep, &args); |
72 | if (ret != 0) { |
73 | pr_err("Unable to create a thread: %s" , strerror(ret)); |
74 | return 1; |
75 | } |
76 | |
77 | /* Wait when the thread will call clock_nanosleep(). */ |
78 | ok = 0; |
79 | for (j = 0; j < 8; j++) { |
80 | /* The maximum timeout is about 5 seconds. */ |
81 | usleep(10000 << j); |
82 | |
83 | /* Try to interrupt clock_nanosleep(). */ |
84 | pthread_kill(thread, SIGUSR1); |
85 | |
86 | usleep(10000 << j); |
87 | /* Check whether clock_nanosleep() has been interrupted or not. */ |
88 | if (pthread_mutex_trylock(&lock) == 0) { |
89 | /**/ |
90 | ok = 1; |
91 | break; |
92 | } |
93 | } |
94 | if (!ok) |
95 | pthread_kill(thread, SIGUSR2); |
96 | pthread_join(thread, NULL); |
97 | pthread_mutex_destroy(&lock); |
98 | |
99 | if (!ok) { |
100 | ksft_test_result_pass(msg: "clockid: %d abs:%d timeout\n" , clockid, abs); |
101 | return 1; |
102 | } |
103 | |
104 | if (rem.tv_sec < 3300 || rem.tv_sec > 3900) { |
105 | pr_fail("clockid: %d abs: %d remain: %ld\n" , |
106 | clockid, abs, rem.tv_sec); |
107 | return 1; |
108 | } |
109 | ksft_test_result_pass(msg: "clockid: %d abs:%d\n" , clockid, abs); |
110 | |
111 | return 0; |
112 | } |
113 | |
114 | int main(int argc, char *argv[]) |
115 | { |
116 | int ret, nsfd; |
117 | |
118 | nscheck(); |
119 | |
120 | ksft_set_plan(plan: 4); |
121 | |
122 | check_supported_timers(); |
123 | |
124 | if (unshare_timens()) |
125 | return 1; |
126 | |
127 | if (_settime(CLOCK_MONOTONIC, 7 * 24 * 3600)) |
128 | return 1; |
129 | if (_settime(CLOCK_BOOTTIME, 9 * 24 * 3600)) |
130 | return 1; |
131 | |
132 | nsfd = open("/proc/self/ns/time_for_children" , O_RDONLY); |
133 | if (nsfd < 0) |
134 | return pr_perror("Unable to open timens_for_children" ); |
135 | |
136 | if (setns(nsfd, CLONE_NEWTIME)) |
137 | return pr_perror("Unable to set timens" ); |
138 | |
139 | ret = 0; |
140 | ret |= run_test(CLOCK_MONOTONIC, 0); |
141 | ret |= run_test(CLOCK_MONOTONIC, 1); |
142 | ret |= run_test(CLOCK_BOOTTIME_ALARM, 0); |
143 | ret |= run_test(CLOCK_BOOTTIME_ALARM, 1); |
144 | |
145 | if (ret) |
146 | ksft_exit_fail(); |
147 | ksft_exit_pass(); |
148 | return ret; |
149 | } |
150 | |