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 if (mount(device, mntpoint_src, fs_type, 0, NULL) == -1)
73 tst_brkm(TBROK | TERRNO, cleanup, "mount %s failed",
74 mntpoint_src);
75
76 TEST(mount(mntpoint_src, mntpoint_des, fs_type, MS_MOVE, NULL));
77
78 if (TEST_RETURN != 0) {
79 tst_resm(TFAIL | TTERRNO, "mount(2) failed");
80 } else {
81
82 if (!ismount(mntpoint_src) && ismount(mntpoint_des))
83 tst_resm(TPASS, "move mount is ok");
84 else
85 tst_resm(TFAIL, "move mount does not work");
86
87 TEST(tst_umount(mntpoint_des));
88 if (TEST_RETURN != 0)
89 tst_brkm(TBROK | TTERRNO, cleanup,
90 "umount(2) failed");
91 }
92 }
93
94 cleanup();
95 tst_exit();
96 }
97
ismount(char * mntpoint)98 int ismount(char *mntpoint)
99 {
100 int ret = 0;
101 FILE *file;
102 char line[LINELENGTH];
103
104 file = fopen("/proc/mounts", "r");
105 if (file == NULL)
106 tst_brkm(TFAIL | TERRNO, NULL, "Open /proc/mounts failed");
107
108 while (fgets(line, LINELENGTH, file) != NULL) {
109 if (strstr(line, mntpoint) != NULL) {
110 ret = 1;
111 break;
112 }
113 }
114 fclose(file);
115 return ret;
116 }
117
setup(void)118 static void setup(void)
119 {
120 tst_require_root();
121
122 tst_sig(NOFORK, DEF_HANDLER, cleanup);
123
124 tst_tmpdir();
125
126 fs_type = tst_dev_fs_type();
127 device = tst_acquire_device(cleanup);
128
129 if (!device)
130 tst_brkm(TCONF, cleanup, "Failed to obtain block device");
131
132 tst_mkfs(cleanup, device, fs_type, NULL, NULL);
133
134 if (getcwd(path_name, sizeof(path_name)) == NULL)
135 tst_brkm(TBROK, cleanup, "getcwd failed");
136
137 /*
138 * Turn current dir into a private mount point being a parent
139 * mount which is required by move mount.
140 */
141 if (mount(path_name, path_name, "none", MS_BIND, NULL) == -1)
142 tst_brkm(TBROK | TERRNO, cleanup, "bind mount failed");
143
144 mount_flag = 1;
145
146 if (mount("none", path_name, "none", MS_PRIVATE, NULL) == -1)
147 tst_brkm(TBROK | TERRNO, cleanup, "mount private failed");
148
149 snprintf(mntpoint_src, PATH_MAX, "%s/%s", path_name, MNTPOINT_SRC);
150 snprintf(mntpoint_des, PATH_MAX, "%s/%s", path_name, MNTPOINT_DES);
151
152 SAFE_MKDIR(cleanup, mntpoint_src, DIR_MODE);
153 SAFE_MKDIR(cleanup, mntpoint_des, DIR_MODE);
154
155 TEST_PAUSE;
156 }
157
cleanup(void)158 static void cleanup(void)
159 {
160 if (mount_flag && tst_umount(path_name) != 0)
161 tst_resm(TWARN | TERRNO, "umount(2) %s failed", path_name);
162
163 if (device)
164 tst_release_device(device);
165
166 tst_rmdir();
167 }
168