1 /*
2 * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
3 * Copyright (c) 2014 Cyril Hrubis <chrubis@suse.cz>
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 * AUTHOR : Nirmala Devi Dhanasekar <nirmala.devi@wipro.com>
18 *
19 * DESCRIPTION
20 * Check for basic errors returned by umount(2) system call.
21 *
22 * Verify that umount(2) returns -1 and sets errno to
23 *
24 * 1) EBUSY if it cannot be umounted, because dir is still busy.
25 * 2) EFAULT if specialfile or device file points to invalid address space.
26 * 3) ENOENT if pathname was empty or has a nonexistent component.
27 * 4) EINVAL if specialfile or device is invalid or not a mount point.
28 * 5) ENAMETOOLONG if pathname was longer than MAXPATHLEN.
29 *****************************************************************************/
30
31 #include <errno.h>
32 #include <string.h>
33 #include <sys/mount.h>
34 #include "tst_test.h"
35
36 #define MNTPOINT "mntpoint"
37
38 static char long_path[PATH_MAX + 2];
39 static int mount_flag;
40 static int fd;
41
42 static struct tcase {
43 const char *err_desc;
44 const char *mntpoint;
45 int exp_errno;
46 } tcases[] = {
47 {"Already mounted/busy", MNTPOINT, EBUSY},
48 {"Invalid address", NULL, EFAULT},
49 {"Directory not found", "nonexistent", ENOENT},
50 {"Invalid device", "./", EINVAL},
51 {"Pathname too long", long_path, ENAMETOOLONG}
52 };
53
verify_umount(unsigned int n)54 static void verify_umount(unsigned int n)
55 {
56 struct tcase *tc = &tcases[n];
57
58 TEST(umount(tc->mntpoint));
59
60 if (TEST_RETURN != -1) {
61 tst_res(TFAIL, "umount() succeeds unexpectedly");
62 return;
63 }
64
65 if (tc->exp_errno != TEST_ERRNO) {
66 tst_res(TFAIL | TTERRNO, "umount() should fail with %s",
67 tst_strerrno(tc->exp_errno));
68 return;
69 }
70
71 tst_res(TPASS | TTERRNO, "umount() fails as expected: %s",
72 tc->err_desc);
73 }
74
setup(void)75 static void setup(void)
76 {
77 memset(long_path, 'a', PATH_MAX + 1);
78
79 SAFE_MKDIR(MNTPOINT, 0775);
80 SAFE_MOUNT(tst_device->dev, MNTPOINT, tst_device->fs_type, 0, NULL);
81 mount_flag = 1;
82
83 fd = SAFE_CREAT(MNTPOINT "/file", 0777);
84 }
85
cleanup(void)86 static void cleanup(void)
87 {
88 if (fd > 0)
89 SAFE_CLOSE(fd);
90
91 if (mount_flag)
92 tst_umount(MNTPOINT);
93 }
94
95 static struct tst_test test = {
96 .tcnt = ARRAY_SIZE(tcases),
97 .needs_root = 1,
98 .needs_tmpdir = 1,
99 .format_device = 1,
100 .setup = setup,
101 .cleanup = cleanup,
102 .test = verify_umount,
103 };
104