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git.ipfire.org Git - thirdparty/systemd.git/blob - src/test/test-mount-util.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2016 Lennart Poettering
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.
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.
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/>.
21 #include <sys/mount.h>
23 #include "alloc-util.h"
30 #include "mount-util.h"
31 #include "path-util.h"
33 #include "string-util.h"
35 static void test_mount_propagation_flags(const char *name
, int ret
, unsigned long expected
) {
38 assert_se(mount_propagation_flags_from_string(name
, &flags
) == ret
);
43 assert_se(flags
== expected
);
45 c
= mount_propagation_flags_to_string(flags
);
47 assert_se(isempty(c
));
49 assert_se(streq(c
, name
));
53 static void test_mnt_id(void) {
54 _cleanup_fclose_
FILE *f
= NULL
;
61 assert_se(f
= fopen("/proc/self/mountinfo", "re"));
62 assert_se(h
= hashmap_new(&trivial_hash_ops
));
65 _cleanup_free_
char *line
= NULL
, *path
= NULL
;
68 r
= read_line(f
, LONG_LINE_MAX
, &line
);
73 assert_se(sscanf(line
, "%i %*s %*s %*s %ms", &mnt_id
, &path
) == 2);
75 assert_se(hashmap_put(h
, INT_TO_PTR(mnt_id
), path
) >= 0);
79 HASHMAP_FOREACH_KEY(p
, k
, h
, i
) {
80 int mnt_id
= PTR_TO_INT(k
), mnt_id2
;
82 r
= path_get_mnt_id(p
, &mnt_id2
);
83 if (r
== -EOPNOTSUPP
) { /* kernel or file system too old? */
84 log_debug("%s doesn't support mount IDs\n", p
);
87 if (IN_SET(r
, -EACCES
, -EPERM
)) {
88 log_debug("Can't access %s\n", p
);
92 log_debug("mnt id of %s is %i\n", p
, mnt_id2
);
94 if (mnt_id
== mnt_id2
)
97 /* The ids don't match? If so, then there are two mounts on the same path, let's check if that's really
99 assert_se(path_equal_ptr(hashmap_get(h
, INT_TO_PTR(mnt_id2
)), p
));
102 hashmap_free_free(h
);
105 static void test_path_is_mount_point(void) {
107 char tmp_dir
[] = "/tmp/test-path-is-mount-point-XXXXXX";
108 _cleanup_free_
char *file1
= NULL
, *file2
= NULL
, *link1
= NULL
, *link2
= NULL
;
109 _cleanup_free_
char *dir1
= NULL
, *dir1file
= NULL
, *dirlink1
= NULL
, *dirlink1file
= NULL
;
110 _cleanup_free_
char *dir2
= NULL
, *dir2file
= NULL
;
112 assert_se(path_is_mount_point("/", NULL
, AT_SYMLINK_FOLLOW
) > 0);
113 assert_se(path_is_mount_point("/", NULL
, 0) > 0);
114 assert_se(path_is_mount_point("//", NULL
, AT_SYMLINK_FOLLOW
) > 0);
115 assert_se(path_is_mount_point("//", NULL
, 0) > 0);
117 assert_se(path_is_mount_point("/proc", NULL
, AT_SYMLINK_FOLLOW
) > 0);
118 assert_se(path_is_mount_point("/proc", NULL
, 0) > 0);
119 assert_se(path_is_mount_point("/proc/", NULL
, AT_SYMLINK_FOLLOW
) > 0);
120 assert_se(path_is_mount_point("/proc/", NULL
, 0) > 0);
122 assert_se(path_is_mount_point("/proc/1", NULL
, AT_SYMLINK_FOLLOW
) == 0);
123 assert_se(path_is_mount_point("/proc/1", NULL
, 0) == 0);
124 assert_se(path_is_mount_point("/proc/1/", NULL
, AT_SYMLINK_FOLLOW
) == 0);
125 assert_se(path_is_mount_point("/proc/1/", NULL
, 0) == 0);
127 assert_se(path_is_mount_point("/sys", NULL
, AT_SYMLINK_FOLLOW
) > 0);
128 assert_se(path_is_mount_point("/sys", NULL
, 0) > 0);
129 assert_se(path_is_mount_point("/sys/", NULL
, AT_SYMLINK_FOLLOW
) > 0);
130 assert_se(path_is_mount_point("/sys/", NULL
, 0) > 0);
132 /* we'll create a hierarchy of different kinds of dir/file/link
135 * <tmp>/file1, <tmp>/file2
136 * <tmp>/link1 -> file1, <tmp>/link2 -> file2
139 * <tmp>/dirlink1 -> dir1
140 * <tmp>/dirlink1file -> dirlink1/file
145 /* file mountpoints */
146 assert_se(mkdtemp(tmp_dir
) != NULL
);
147 file1
= path_join(NULL
, tmp_dir
, "file1");
149 file2
= path_join(NULL
, tmp_dir
, "file2");
151 fd
= open(file1
, O_WRONLY
|O_CREAT
|O_EXCL
|O_CLOEXEC
, 0664);
154 fd
= open(file2
, O_WRONLY
|O_CREAT
|O_EXCL
|O_CLOEXEC
, 0664);
157 link1
= path_join(NULL
, tmp_dir
, "link1");
159 assert_se(symlink("file1", link1
) == 0);
160 link2
= path_join(NULL
, tmp_dir
, "link2");
162 assert_se(symlink("file2", link2
) == 0);
164 assert_se(path_is_mount_point(file1
, NULL
, AT_SYMLINK_FOLLOW
) == 0);
165 assert_se(path_is_mount_point(file1
, NULL
, 0) == 0);
166 assert_se(path_is_mount_point(link1
, NULL
, AT_SYMLINK_FOLLOW
) == 0);
167 assert_se(path_is_mount_point(link1
, NULL
, 0) == 0);
169 /* directory mountpoints */
170 dir1
= path_join(NULL
, tmp_dir
, "dir1");
172 assert_se(mkdir(dir1
, 0755) == 0);
173 dirlink1
= path_join(NULL
, tmp_dir
, "dirlink1");
175 assert_se(symlink("dir1", dirlink1
) == 0);
176 dirlink1file
= path_join(NULL
, tmp_dir
, "dirlink1file");
177 assert_se(dirlink1file
);
178 assert_se(symlink("dirlink1/file", dirlink1file
) == 0);
179 dir2
= path_join(NULL
, tmp_dir
, "dir2");
181 assert_se(mkdir(dir2
, 0755) == 0);
183 assert_se(path_is_mount_point(dir1
, NULL
, AT_SYMLINK_FOLLOW
) == 0);
184 assert_se(path_is_mount_point(dir1
, NULL
, 0) == 0);
185 assert_se(path_is_mount_point(dirlink1
, NULL
, AT_SYMLINK_FOLLOW
) == 0);
186 assert_se(path_is_mount_point(dirlink1
, NULL
, 0) == 0);
188 /* file in subdirectory mountpoints */
189 dir1file
= path_join(NULL
, dir1
, "file");
191 fd
= open(dir1file
, O_WRONLY
|O_CREAT
|O_EXCL
|O_CLOEXEC
, 0664);
195 assert_se(path_is_mount_point(dir1file
, NULL
, AT_SYMLINK_FOLLOW
) == 0);
196 assert_se(path_is_mount_point(dir1file
, NULL
, 0) == 0);
197 assert_se(path_is_mount_point(dirlink1file
, NULL
, AT_SYMLINK_FOLLOW
) == 0);
198 assert_se(path_is_mount_point(dirlink1file
, NULL
, 0) == 0);
200 /* these tests will only work as root */
201 if (mount(file1
, file2
, NULL
, MS_BIND
, NULL
) >= 0) {
202 int rf
, rt
, rdf
, rdt
, rlf
, rlt
, rl1f
, rl1t
;
206 /* capture results in vars, to avoid dangling mounts on failure */
207 log_info("%s: %s", __func__
, file2
);
208 rf
= path_is_mount_point(file2
, NULL
, 0);
209 rt
= path_is_mount_point(file2
, NULL
, AT_SYMLINK_FOLLOW
);
211 file2d
= strjoina(file2
, "/");
212 log_info("%s: %s", __func__
, file2d
);
213 rdf
= path_is_mount_point(file2d
, NULL
, 0);
214 rdt
= path_is_mount_point(file2d
, NULL
, AT_SYMLINK_FOLLOW
);
216 log_info("%s: %s", __func__
, link2
);
217 rlf
= path_is_mount_point(link2
, NULL
, 0);
218 rlt
= path_is_mount_point(link2
, NULL
, AT_SYMLINK_FOLLOW
);
220 assert_se(umount(file2
) == 0);
224 assert_se(rdf
== -ENOTDIR
);
225 assert_se(rdt
== -ENOTDIR
);
230 dir2file
= path_join(NULL
, dir2
, "file");
232 fd
= open(dir2file
, O_WRONLY
|O_CREAT
|O_EXCL
|O_CLOEXEC
, 0664);
236 assert_se(mount(dir2
, dir1
, NULL
, MS_BIND
, NULL
) >= 0);
238 log_info("%s: %s", __func__
, dir1
);
239 rf
= path_is_mount_point(dir1
, NULL
, 0);
240 rt
= path_is_mount_point(dir1
, NULL
, AT_SYMLINK_FOLLOW
);
241 log_info("%s: %s", __func__
, dirlink1
);
242 rlf
= path_is_mount_point(dirlink1
, NULL
, 0);
243 rlt
= path_is_mount_point(dirlink1
, NULL
, AT_SYMLINK_FOLLOW
);
244 log_info("%s: %s", __func__
, dirlink1file
);
245 /* its parent is a mount point, but not /file itself */
246 rl1f
= path_is_mount_point(dirlink1file
, NULL
, 0);
247 rl1t
= path_is_mount_point(dirlink1file
, NULL
, AT_SYMLINK_FOLLOW
);
249 assert_se(umount(dir1
) == 0);
255 assert_se(rl1f
== 0);
256 assert_se(rl1t
== 0);
259 printf("Skipping bind mount file test: %m\n");
261 assert_se(rm_rf(tmp_dir
, REMOVE_ROOT
|REMOVE_PHYSICAL
) == 0);
264 static void test_mount_option_mangle(void) {
268 assert_se(mount_option_mangle(NULL
, MS_RDONLY
|MS_NOSUID
, &f
, &opts
) == 0);
269 assert_se(f
== (MS_RDONLY
|MS_NOSUID
));
270 assert_se(opts
== NULL
);
272 assert_se(mount_option_mangle("", MS_RDONLY
|MS_NOSUID
, &f
, &opts
) == 0);
273 assert_se(f
== (MS_RDONLY
|MS_NOSUID
));
274 assert_se(opts
== NULL
);
276 assert_se(mount_option_mangle("ro,nosuid,nodev,noexec", 0, &f
, &opts
) == 0);
277 assert_se(f
== (MS_RDONLY
|MS_NOSUID
|MS_NODEV
|MS_NOEXEC
));
278 assert_se(opts
== NULL
);
280 assert_se(mount_option_mangle("ro,nosuid,nodev,noexec,mode=755", 0, &f
, &opts
) == 0);
281 assert_se(f
== (MS_RDONLY
|MS_NOSUID
|MS_NODEV
|MS_NOEXEC
));
282 assert_se(streq(opts
, "mode=755"));
285 assert_se(mount_option_mangle("rw,nosuid,foo,hogehoge,nodev,mode=755", 0, &f
, &opts
) == 0);
286 assert_se(f
== (MS_NOSUID
|MS_NODEV
));
287 assert_se(streq(opts
, "foo,hogehoge,mode=755"));
290 assert_se(mount_option_mangle("rw,nosuid,nodev,noexec,relatime,net_cls,net_prio", MS_RDONLY
, &f
, &opts
) == 0);
291 assert_se(f
== (MS_NOSUID
|MS_NODEV
|MS_NOEXEC
|MS_RELATIME
));
292 assert_se(streq(opts
, "net_cls,net_prio"));
295 assert_se(mount_option_mangle("rw,nosuid,nodev,relatime,size=1630748k,mode=700,uid=1000,gid=1000", MS_RDONLY
, &f
, &opts
) == 0);
296 assert_se(f
== (MS_NOSUID
|MS_NODEV
|MS_RELATIME
));
297 assert_se(streq(opts
, "size=1630748k,mode=700,uid=1000,gid=1000"));
300 assert_se(mount_option_mangle("size=1630748k,rw,gid=1000,,,nodev,relatime,,mode=700,nosuid,uid=1000", MS_RDONLY
, &f
, &opts
) == 0);
301 assert_se(f
== (MS_NOSUID
|MS_NODEV
|MS_RELATIME
));
302 assert_se(streq(opts
, "size=1630748k,gid=1000,mode=700,uid=1000"));
305 assert_se(mount_option_mangle("rw,exec,size=8143984k,nr_inodes=2035996,mode=755", MS_RDONLY
|MS_NOSUID
|MS_NOEXEC
|MS_NODEV
, &f
, &opts
) == 0);
306 assert_se(f
== (MS_NOSUID
|MS_NODEV
));
307 assert_se(streq(opts
, "size=8143984k,nr_inodes=2035996,mode=755"));
310 assert_se(mount_option_mangle("rw,relatime,fmask=0022,,,dmask=0022", MS_RDONLY
, &f
, &opts
) == 0);
311 assert_se(f
== MS_RELATIME
);
312 assert_se(streq(opts
, "fmask=0022,dmask=0022"));
315 assert_se(mount_option_mangle("rw,relatime,fmask=0022,dmask=0022,\"hogehoge", MS_RDONLY
, &f
, &opts
) < 0);
318 int main(int argc
, char *argv
[]) {
320 log_set_max_level(LOG_DEBUG
);
322 test_mount_propagation_flags("shared", 0, MS_SHARED
);
323 test_mount_propagation_flags("slave", 0, MS_SLAVE
);
324 test_mount_propagation_flags("private", 0, MS_PRIVATE
);
325 test_mount_propagation_flags(NULL
, 0, 0);
326 test_mount_propagation_flags("", 0, 0);
327 test_mount_propagation_flags("xxxx", -EINVAL
, 0);
328 test_mount_propagation_flags(" ", -EINVAL
, 0);
331 test_path_is_mount_point();
332 test_mount_option_mangle();