1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #define _GNU_SOURCE |
3 | #include <errno.h> |
4 | #include <fcntl.h> |
5 | #include <sched.h> |
6 | #include <stdio.h> |
7 | #include <stdbool.h> |
8 | #include <sys/stat.h> |
9 | #include <sys/syscall.h> |
10 | #include <sys/types.h> |
11 | #include <sys/wait.h> |
12 | #include <time.h> |
13 | #include <unistd.h> |
14 | #include <string.h> |
15 | #include <pthread.h> |
16 | |
17 | #include "log.h" |
18 | #include "timens.h" |
19 | |
20 | #define OFFSET (36000) |
21 | |
22 | struct thread_args { |
23 | char *tst_name; |
24 | struct timespec *now; |
25 | }; |
26 | |
27 | static void *tcheck(void *_args) |
28 | { |
29 | struct thread_args *args = _args; |
30 | struct timespec *now = args->now, tst; |
31 | int i; |
32 | |
33 | for (i = 0; i < 2; i++) { |
34 | _gettime(CLOCK_MONOTONIC, &tst, i); |
35 | if (abs(tst.tv_sec - now->tv_sec) > 5) { |
36 | pr_fail("%s: in-thread: unexpected value: %ld (%ld)\n" , |
37 | args->tst_name, tst.tv_sec, now->tv_sec); |
38 | return (void *)1UL; |
39 | } |
40 | } |
41 | return NULL; |
42 | } |
43 | |
44 | static int check_in_thread(char *tst_name, struct timespec *now) |
45 | { |
46 | struct thread_args args = { |
47 | .tst_name = tst_name, |
48 | .now = now, |
49 | }; |
50 | pthread_t th; |
51 | void *retval; |
52 | |
53 | if (pthread_create(&th, NULL, tcheck, &args)) |
54 | return pr_perror("thread" ); |
55 | if (pthread_join(th, &retval)) |
56 | return pr_perror("pthread_join" ); |
57 | return !(retval == NULL); |
58 | } |
59 | |
60 | static int check(char *tst_name, struct timespec *now) |
61 | { |
62 | struct timespec tst; |
63 | int i; |
64 | |
65 | for (i = 0; i < 2; i++) { |
66 | _gettime(CLOCK_MONOTONIC, &tst, i); |
67 | if (abs(tst.tv_sec - now->tv_sec) > 5) |
68 | return pr_fail("%s: unexpected value: %ld (%ld)\n" , |
69 | tst_name, tst.tv_sec, now->tv_sec); |
70 | } |
71 | if (check_in_thread(tst_name, now)) |
72 | return 1; |
73 | ksft_test_result_pass(msg: "%s\n" , tst_name); |
74 | return 0; |
75 | } |
76 | |
77 | int main(int argc, char *argv[]) |
78 | { |
79 | struct timespec now; |
80 | int status; |
81 | pid_t pid; |
82 | |
83 | if (argc > 1) { |
84 | char *endptr; |
85 | |
86 | ksft_cnt.ksft_pass = 1; |
87 | now.tv_sec = strtoul(argv[1], &endptr, 0); |
88 | if (*endptr != 0) |
89 | return pr_perror("strtoul" ); |
90 | |
91 | return check(tst_name: "child after exec" , now: &now); |
92 | } |
93 | |
94 | nscheck(); |
95 | |
96 | ksft_set_plan(plan: 4); |
97 | |
98 | clock_gettime(CLOCK_MONOTONIC, &now); |
99 | |
100 | if (unshare_timens()) |
101 | return 1; |
102 | |
103 | if (_settime(CLOCK_MONOTONIC, OFFSET)) |
104 | return 1; |
105 | |
106 | if (check(tst_name: "parent before vfork" , now: &now)) |
107 | return 1; |
108 | |
109 | pid = vfork(); |
110 | if (pid < 0) |
111 | return pr_perror("fork" ); |
112 | |
113 | if (pid == 0) { |
114 | char now_str[64]; |
115 | char *cargv[] = {"exec" , now_str, NULL}; |
116 | char *cenv[] = {NULL}; |
117 | |
118 | /* Check for proper vvar offsets after execve. */ |
119 | snprintf(now_str, sizeof(now_str), "%ld" , now.tv_sec + OFFSET); |
120 | execve("/proc/self/exe" , cargv, cenv); |
121 | pr_perror("execve" ); |
122 | _exit(1); |
123 | } |
124 | |
125 | if (waitpid(pid, &status, 0) != pid) |
126 | return pr_perror("waitpid" ); |
127 | |
128 | if (status) |
129 | ksft_exit_fail(); |
130 | ksft_inc_pass_cnt(); |
131 | ksft_test_result_pass(msg: "wait for child\n" ); |
132 | |
133 | /* Check that we are still in the source timens. */ |
134 | if (check(tst_name: "parent after vfork" , now: &now)) |
135 | return 1; |
136 | |
137 | ksft_exit_pass(); |
138 | return 0; |
139 | } |
140 | |