1 /*
2 * Copyright (c) 2013 Fujitsu Ltd.
3 * Author: DAN LI <li.dan@cn.fujitsu.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 *
17 */
18
19 /*
20 * DESCRIPTION
21 * Test for feature MS_MOVE of mount(2).
22 * "Move an existing mount point to the new location."
23 */
24
25 #include <errno.h>
26 #include <sys/mount.h>
27 #include <unistd.h>
28 #include <fcntl.h>
29
30 #include "test.h"
31 #include "safe_macros.h"
32
33 #ifndef MS_MOVE
34 #define MS_MOVE 8192
35 #endif
36
37 #ifndef MS_PRIVATE
38 #define MS_PRIVATE (1 << 18)
39 #endif
40
41 #define MNTPOINT_SRC "mnt_src"
42 #define MNTPOINT_DES "mnt_des"
43 #define LINELENGTH 256
44 #define DIR_MODE (S_IRWXU | S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP)
45
46 static int ismount(char *mntpoint);
47 static void setup(void);
48 static void cleanup(void);
49
50 char *TCID = "mount06";
51 int TST_TOTAL = 1;
52
53 static const char *fs_type;
54 static const char *device;
55 static char path_name[PATH_MAX];
56 static char mntpoint_src[PATH_MAX];
57 static char mntpoint_des[PATH_MAX];
58 static int mount_flag;
59
main(int argc,char * argv[])60 int main(int argc, char *argv[])
61 {
62 int lc;
63
64 tst_parse_opts(argc, argv, NULL, NULL);
65
66 setup();
67
68 for (lc = 0; TEST_LOOPING(lc); lc++) {
69
70 tst_count = 0;
71
72 SAFE_MOUNT(cleanup, device, mntpoint_src, fs_type, 0, NULL);
73
74 TEST(mount(mntpoint_src, mntpoint_des, fs_type, MS_MOVE, NULL));
75
76 if (TEST_RETURN != 0) {
77 tst_resm(TFAIL | TTERRNO, "mount(2) failed");
78 } else {
79
80 if (!ismount(mntpoint_src) && ismount(mntpoint_des))
81 tst_resm(TPASS, "move mount is ok");
82 else
83 tst_resm(TFAIL, "move mount does not work");
84
85 TEST(tst_umount(mntpoint_des));
86 if (TEST_RETURN != 0)
87 tst_brkm(TBROK | TTERRNO, cleanup,
88 "umount(2) failed");
89 }
90 }
91
92 cleanup();
93 tst_exit();
94 }
95
ismount(char * mntpoint)96 int ismount(char *mntpoint)
97 {
98 int ret = 0;
99 FILE *file;
100 char line[LINELENGTH];
101
102 file = fopen("/proc/mounts", "r");
103 if (file == NULL)
104 tst_brkm(TFAIL | TERRNO, NULL, "Open /proc/mounts failed");
105
106 while (fgets(line, LINELENGTH, file) != NULL) {
107 if (strstr(line, mntpoint) != NULL) {
108 ret = 1;
109 break;
110 }
111 }
112 fclose(file);
113 return ret;
114 }
115
setup(void)116 static void setup(void)
117 {
118 tst_require_root();
119
120 tst_sig(NOFORK, DEF_HANDLER, cleanup);
121
122 tst_tmpdir();
123
124 fs_type = tst_dev_fs_type();
125 device = tst_acquire_device(cleanup);
126
127 if (!device)
128 tst_brkm(TCONF, cleanup, "Failed to obtain block device");
129
130 tst_mkfs(cleanup, device, fs_type, NULL, NULL);
131
132 if (getcwd(path_name, sizeof(path_name)) == NULL)
133 tst_brkm(TBROK, cleanup, "getcwd failed");
134
135 /*
136 * Turn current dir into a private mount point being a parent
137 * mount which is required by move mount.
138 */
139 SAFE_MOUNT(cleanup, path_name, path_name, "none", MS_BIND, NULL);
140
141 mount_flag = 1;
142
143 SAFE_MOUNT(cleanup, "none", path_name, "none", MS_PRIVATE, NULL);
144
145 snprintf(mntpoint_src, PATH_MAX, "%s/%s", path_name, MNTPOINT_SRC);
146 snprintf(mntpoint_des, PATH_MAX, "%s/%s", path_name, MNTPOINT_DES);
147
148 SAFE_MKDIR(cleanup, mntpoint_src, DIR_MODE);
149 SAFE_MKDIR(cleanup, mntpoint_des, DIR_MODE);
150
151 TEST_PAUSE;
152 }
153
cleanup(void)154 static void cleanup(void)
155 {
156 if (mount_flag && tst_umount(path_name) != 0)
157 tst_resm(TWARN | TERRNO, "umount(2) %s failed", path_name);
158
159 if (device)
160 tst_release_device(device);
161
162 tst_rmdir();
163 }
164