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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-or-later */
4 #include <sys/statvfs.h>
6 #include "alloc-util.h"
9 #include "mount-util.h"
10 #include "namespace-util.h"
11 #include "path-util.h"
12 #include "process-util.h"
14 #include "string-util.h"
17 #include "tmpfile-util.h"
19 static void test_mount_option_mangle(void) {
23 assert_se(mount_option_mangle(NULL
, MS_RDONLY
|MS_NOSUID
, &f
, &opts
) == 0);
24 assert_se(f
== (MS_RDONLY
|MS_NOSUID
));
25 assert_se(opts
== NULL
);
27 assert_se(mount_option_mangle("", MS_RDONLY
|MS_NOSUID
, &f
, &opts
) == 0);
28 assert_se(f
== (MS_RDONLY
|MS_NOSUID
));
29 assert_se(opts
== NULL
);
31 assert_se(mount_option_mangle("ro,nosuid,nodev,noexec", 0, &f
, &opts
) == 0);
32 assert_se(f
== (MS_RDONLY
|MS_NOSUID
|MS_NODEV
|MS_NOEXEC
));
33 assert_se(opts
== NULL
);
35 assert_se(mount_option_mangle("ro,nosuid,nodev,noexec,mode=755", 0, &f
, &opts
) == 0);
36 assert_se(f
== (MS_RDONLY
|MS_NOSUID
|MS_NODEV
|MS_NOEXEC
));
37 assert_se(streq(opts
, "mode=755"));
40 assert_se(mount_option_mangle("rw,nosuid,foo,hogehoge,nodev,mode=755", 0, &f
, &opts
) == 0);
41 assert_se(f
== (MS_NOSUID
|MS_NODEV
));
42 assert_se(streq(opts
, "foo,hogehoge,mode=755"));
45 assert_se(mount_option_mangle("rw,nosuid,nodev,noexec,relatime,net_cls,net_prio", MS_RDONLY
, &f
, &opts
) == 0);
46 assert_se(f
== (MS_NOSUID
|MS_NODEV
|MS_NOEXEC
|MS_RELATIME
));
47 assert_se(streq(opts
, "net_cls,net_prio"));
50 assert_se(mount_option_mangle("rw,nosuid,nodev,relatime,size=1630748k,mode=700,uid=1000,gid=1000", MS_RDONLY
, &f
, &opts
) == 0);
51 assert_se(f
== (MS_NOSUID
|MS_NODEV
|MS_RELATIME
));
52 assert_se(streq(opts
, "size=1630748k,mode=700,uid=1000,gid=1000"));
55 assert_se(mount_option_mangle("size=1630748k,rw,gid=1000,,,nodev,relatime,,mode=700,nosuid,uid=1000", MS_RDONLY
, &f
, &opts
) == 0);
56 assert_se(f
== (MS_NOSUID
|MS_NODEV
|MS_RELATIME
));
57 assert_se(streq(opts
, "size=1630748k,gid=1000,mode=700,uid=1000"));
60 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);
61 assert_se(f
== (MS_NOSUID
|MS_NODEV
));
62 assert_se(streq(opts
, "size=8143984k,nr_inodes=2035996,mode=755"));
65 assert_se(mount_option_mangle("rw,relatime,fmask=0022,,,dmask=0022", MS_RDONLY
, &f
, &opts
) == 0);
66 assert_se(f
== MS_RELATIME
);
67 assert_se(streq(opts
, "fmask=0022,dmask=0022"));
70 assert_se(mount_option_mangle("rw,relatime,fmask=0022,dmask=0022,\"hogehoge", MS_RDONLY
, &f
, &opts
) < 0);
73 static void test_bind_remount_recursive(void) {
74 _cleanup_(rm_rf_physical_and_freep
) char *tmp
= NULL
;
75 _cleanup_free_
char *subdir
= NULL
;
79 (void) log_tests_skipped("not running as root");
83 assert_se(mkdtemp_malloc("/tmp/XXXXXX", &tmp
) >= 0);
84 subdir
= path_join(tmp
, "subdir");
86 assert_se(mkdir(subdir
, 0755) >= 0);
88 FOREACH_STRING(p
, "/usr", "/sys", "/", tmp
) {
97 assert_se(detach_mount_namespace() >= 0);
99 /* Check that the subdir is writable (it must be because it's in /tmp) */
100 assert_se(statvfs(subdir
, &svfs
) >= 0);
101 assert_se(!FLAGS_SET(svfs
.f_flag
, ST_RDONLY
));
103 /* Make the subdir a bind mount */
104 assert_se(mount_nofollow(subdir
, subdir
, NULL
, MS_BIND
|MS_REC
, NULL
) >= 0);
106 /* Ensure it's still writable */
107 assert_se(statvfs(subdir
, &svfs
) >= 0);
108 assert_se(!FLAGS_SET(svfs
.f_flag
, ST_RDONLY
));
110 /* Now mark the path we currently run for read-only */
111 assert_se(bind_remount_recursive(p
, MS_RDONLY
, MS_RDONLY
, STRV_MAKE("/sys/kernel")) >= 0);
113 /* Ensure that this worked on the top-level */
114 assert_se(statvfs(p
, &svfs
) >= 0);
115 assert_se(FLAGS_SET(svfs
.f_flag
, ST_RDONLY
));
117 /* And ensure this had an effect on the subdir exactly if we are talking about a path above the subdir */
118 assert_se(statvfs(subdir
, &svfs
) >= 0);
119 assert_se(FLAGS_SET(svfs
.f_flag
, ST_RDONLY
) == !!path_startswith(subdir
, p
));
124 assert_se(wait_for_terminate_and_check("test-remount-rec", pid
, WAIT_LOG
) == EXIT_SUCCESS
);
128 static void test_bind_remount_one(void) {
131 if (geteuid() != 0) {
132 (void) log_tests_skipped("not running as root");
142 _cleanup_fclose_
FILE *proc_self_mountinfo
= NULL
;
144 assert_se(detach_mount_namespace() >= 0);
146 assert_se(fopen_unlocked("/proc/self/mountinfo", "re", &proc_self_mountinfo
) >= 0);
148 assert_se(bind_remount_one_with_mountinfo("/run", MS_RDONLY
, MS_RDONLY
, proc_self_mountinfo
) >= 0);
149 assert_se(bind_remount_one_with_mountinfo("/proc/idontexist", MS_RDONLY
, MS_RDONLY
, proc_self_mountinfo
) == -ENOENT
);
150 assert_se(bind_remount_one_with_mountinfo("/proc/self", MS_RDONLY
, MS_RDONLY
, proc_self_mountinfo
) == -EINVAL
);
151 assert_se(bind_remount_one_with_mountinfo("/", MS_RDONLY
, MS_RDONLY
, proc_self_mountinfo
) >= 0);
156 assert_se(wait_for_terminate_and_check("test-remount-one", pid
, WAIT_LOG
) == EXIT_SUCCESS
);
159 int main(int argc
, char *argv
[]) {
160 test_setup_logging(LOG_DEBUG
);
162 test_mount_option_mangle();
163 test_bind_remount_recursive();
164 test_bind_remount_one();