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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
83555251 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2016 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
21 | #include <sys/mount.h> | |
22 | ||
c2a986d5 LP |
23 | #include "alloc-util.h" |
24 | #include "def.h" | |
25 | #include "fd-util.h" | |
26 | #include "fileio.h" | |
27 | #include "hashmap.h" | |
83555251 LP |
28 | #include "log.h" |
29 | #include "mount-util.h" | |
9b1573ef | 30 | #include "path-util.h" |
83555251 LP |
31 | #include "string-util.h" |
32 | ||
c7383828 ZJS |
33 | static void test_mount_propagation_flags(const char *name, int ret, unsigned long expected) { |
34 | long unsigned flags; | |
83555251 | 35 | |
85e55d14 | 36 | assert_se(mount_propagation_flags_from_string(name, &flags) == ret); |
c7383828 ZJS |
37 | |
38 | if (ret >= 0) { | |
39 | const char *c; | |
40 | ||
41 | assert_se(flags == expected); | |
42 | ||
43 | c = mount_propagation_flags_to_string(flags); | |
44 | if (isempty(name)) | |
45 | assert_se(isempty(c)); | |
46 | else | |
47 | assert_se(streq(c, name)); | |
48 | } | |
83555251 LP |
49 | } |
50 | ||
c2a986d5 LP |
51 | static void test_mnt_id(void) { |
52 | _cleanup_fclose_ FILE *f = NULL; | |
53 | Hashmap *h; | |
54 | Iterator i; | |
9b1573ef LP |
55 | char *p; |
56 | void *k; | |
c2a986d5 LP |
57 | int r; |
58 | ||
59 | assert_se(f = fopen("/proc/self/mountinfo", "re")); | |
9b1573ef | 60 | assert_se(h = hashmap_new(&trivial_hash_ops)); |
c2a986d5 LP |
61 | |
62 | for (;;) { | |
63 | _cleanup_free_ char *line = NULL, *path = NULL; | |
c2a986d5 LP |
64 | int mnt_id; |
65 | ||
66 | r = read_line(f, LONG_LINE_MAX, &line); | |
67 | if (r == 0) | |
68 | break; | |
69 | assert_se(r > 0); | |
70 | ||
71 | assert_se(sscanf(line, "%i %*s %*s %*s %ms", &mnt_id, &path) == 2); | |
72 | ||
9b1573ef | 73 | assert_se(hashmap_put(h, INT_TO_PTR(mnt_id), path) >= 0); |
c2a986d5 LP |
74 | path = NULL; |
75 | } | |
76 | ||
77 | HASHMAP_FOREACH_KEY(p, k, h, i) { | |
9b1573ef | 78 | int mnt_id = PTR_TO_INT(k), mnt_id2; |
c2a986d5 | 79 | |
9b1573ef | 80 | r = path_get_mnt_id(p, &mnt_id2); |
c2a986d5 | 81 | if (r == -EOPNOTSUPP) { /* kernel or file system too old? */ |
9b1573ef | 82 | log_debug("%s doesn't support mount IDs\n", p); |
c2a986d5 LP |
83 | continue; |
84 | } | |
85 | if (IN_SET(r, -EACCES, -EPERM)) { | |
9b1573ef | 86 | log_debug("Can't access %s\n", p); |
c2a986d5 LP |
87 | continue; |
88 | } | |
89 | ||
9b1573ef LP |
90 | log_debug("mnt id of %s is %i\n", p, mnt_id2); |
91 | ||
92 | if (mnt_id == mnt_id2) | |
93 | continue; | |
c2a986d5 | 94 | |
9b1573ef LP |
95 | /* The ids don't match? If so, then there are two mounts on the same path, let's check if that's really |
96 | * the case */ | |
97 | assert_se(path_equal_ptr(hashmap_get(h, INT_TO_PTR(mnt_id2)), p)); | |
c2a986d5 LP |
98 | } |
99 | ||
9b1573ef LP |
100 | while ((p = hashmap_steal_first(h))) |
101 | free(p); | |
c2a986d5 LP |
102 | |
103 | hashmap_free(h); | |
104 | } | |
105 | ||
83555251 LP |
106 | int main(int argc, char *argv[]) { |
107 | ||
108 | log_set_max_level(LOG_DEBUG); | |
109 | ||
c7383828 ZJS |
110 | test_mount_propagation_flags("shared", 0, MS_SHARED); |
111 | test_mount_propagation_flags("slave", 0, MS_SLAVE); | |
112 | test_mount_propagation_flags("private", 0, MS_PRIVATE); | |
113 | test_mount_propagation_flags(NULL, 0, 0); | |
114 | test_mount_propagation_flags("", 0, 0); | |
115 | test_mount_propagation_flags("xxxx", -EINVAL, 0); | |
116 | test_mount_propagation_flags(" ", -EINVAL, 0); | |
83555251 | 117 | |
c2a986d5 LP |
118 | test_mnt_id(); |
119 | ||
83555251 LP |
120 | return 0; |
121 | } |