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