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
|
/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
Copyright 2016 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <sys/mount.h>
#include "alloc-util.h"
#include "def.h"
#include "fd-util.h"
#include "fileio.h"
#include "hashmap.h"
#include "log.h"
#include "mount-util.h"
#include "path-util.h"
#include "string-util.h"
static void test_mount_propagation_flags(const char *name, int ret, unsigned long expected) {
long unsigned flags;
assert_se(mount_propagation_flags_from_string(name, &flags) == ret);
if (ret >= 0) {
const char *c;
assert_se(flags == expected);
c = mount_propagation_flags_to_string(flags);
if (isempty(name))
assert_se(isempty(c));
else
assert_se(streq(c, name));
}
}
static void test_mnt_id(void) {
_cleanup_fclose_ FILE *f = NULL;
Hashmap *h;
Iterator i;
char *p;
void *k;
int r;
assert_se(f = fopen("/proc/self/mountinfo", "re"));
assert_se(h = hashmap_new(&trivial_hash_ops));
for (;;) {
_cleanup_free_ char *line = NULL, *path = NULL;
int mnt_id;
r = read_line(f, LONG_LINE_MAX, &line);
if (r == 0)
break;
assert_se(r > 0);
assert_se(sscanf(line, "%i %*s %*s %*s %ms", &mnt_id, &path) == 2);
assert_se(hashmap_put(h, INT_TO_PTR(mnt_id), path) >= 0);
path = NULL;
}
HASHMAP_FOREACH_KEY(p, k, h, i) {
int mnt_id = PTR_TO_INT(k), mnt_id2;
r = path_get_mnt_id(p, &mnt_id2);
if (r == -EOPNOTSUPP) { /* kernel or file system too old? */
log_debug("%s doesn't support mount IDs\n", p);
continue;
}
if (IN_SET(r, -EACCES, -EPERM)) {
log_debug("Can't access %s\n", p);
continue;
}
log_debug("mnt id of %s is %i\n", p, mnt_id2);
if (mnt_id == mnt_id2)
continue;
/* The ids don't match? If so, then there are two mounts on the same path, let's check if that's really
* the case */
assert_se(path_equal_ptr(hashmap_get(h, INT_TO_PTR(mnt_id2)), p));
}
hashmap_free_free(h);
}
int main(int argc, char *argv[]) {
log_set_max_level(LOG_DEBUG);
test_mount_propagation_flags("shared", 0, MS_SHARED);
test_mount_propagation_flags("slave", 0, MS_SLAVE);
test_mount_propagation_flags("private", 0, MS_PRIVATE);
test_mount_propagation_flags(NULL, 0, 0);
test_mount_propagation_flags("", 0, 0);
test_mount_propagation_flags("xxxx", -EINVAL, 0);
test_mount_propagation_flags(" ", -EINVAL, 0);
test_mnt_id();
return 0;
}
|
