1 /*
2 * Copyright (c) 2014 Fujitsu Ltd.
3 * Author: Zeng Linggang <zenglg.jy@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 * DESCRIPTION
19 * check mkdirat() with various error conditions that should produce
20 * ELOOP and EROFS.
21 */
22
23 #define _GNU_SOURCE
24
25 #include <errno.h>
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <sys/mman.h>
29 #include <fcntl.h>
30 #include <sys/mount.h>
31 #include "test.h"
32 #include "safe_macros.h"
33 #include "lapi/mkdirat.h"
34
35 static void setup(void);
36 static void cleanup(void);
37
38 #define TEST_FILE1 "mntpoint/test_file1"
39 #define DIR_MODE (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP| \
40 S_IXGRP|S_IROTH|S_IXOTH)
41
42 char *TCID = "mkdirat02";
43
44 static int dir_fd;
45 static int cur_fd = AT_FDCWD;
46 static char test_file2[PATH_MAX] = ".";
47 static const char *device;
48 static int mount_flag_dir;
49 static int mount_flag_cur;
50
51 static struct test_case_t {
52 int *dirfd;
53 char *pathname;
54 int exp_errno;
55 } TC[] = {
56 {&dir_fd, TEST_FILE1, EROFS},
57 {&cur_fd, TEST_FILE1, EROFS},
58 {&dir_fd, test_file2, ELOOP},
59 {&cur_fd, test_file2, ELOOP},
60 };
61
62 int TST_TOTAL = ARRAY_SIZE(TC);
63 static void mkdirat_verify(const struct test_case_t *);
64
main(int ac,char ** av)65 int main(int ac, char **av)
66 {
67 int lc;
68 int i;
69
70 tst_parse_opts(ac, av, NULL, NULL);
71
72 setup();
73
74 for (lc = 0; TEST_LOOPING(lc); lc++) {
75 tst_count = 0;
76 for (i = 0; i < TST_TOTAL; i++)
77 mkdirat_verify(&TC[i]);
78 }
79
80 cleanup();
81 tst_exit();
82 }
83
setup(void)84 static void setup(void)
85 {
86 int i;
87 const char *fs_type;
88
89 tst_require_root();
90
91 tst_sig(NOFORK, DEF_HANDLER, cleanup);
92
93 TEST_PAUSE;
94
95 tst_tmpdir();
96
97 fs_type = tst_dev_fs_type();
98 device = tst_acquire_device(cleanup);
99
100 if (!device)
101 tst_brkm(TCONF, cleanup, "Failed to acquire device");
102
103 SAFE_MKDIR(cleanup, "test_dir", DIR_MODE);
104 dir_fd = SAFE_OPEN(cleanup, "test_dir", O_DIRECTORY);
105
106 SAFE_MKDIR(cleanup, "test_eloop", DIR_MODE);
107 SAFE_SYMLINK(cleanup, "../test_eloop", "test_eloop/test_eloop");
108
109 SAFE_MKDIR(cleanup, "test_dir/test_eloop", DIR_MODE);
110 SAFE_SYMLINK(cleanup, "../test_eloop",
111 "test_dir/test_eloop/test_eloop");
112 /*
113 * NOTE: the ELOOP test is written based on that the consecutive
114 * symlinks limits in kernel is hardwired to 40.
115 */
116 for (i = 0; i < 43; i++)
117 strcat(test_file2, "/test_eloop");
118
119 tst_mkfs(cleanup, device, fs_type, NULL, NULL);
120
121 SAFE_MKDIR(cleanup, "test_dir/mntpoint", DIR_MODE);
122 if (mount(device, "test_dir/mntpoint", fs_type, MS_RDONLY, NULL) < 0) {
123 tst_brkm(TBROK | TERRNO, cleanup,
124 "mount device:%s failed", device);
125 }
126 mount_flag_dir = 1;
127
128 SAFE_MKDIR(cleanup, "mntpoint", DIR_MODE);
129 if (mount(device, "mntpoint", fs_type, MS_RDONLY, NULL) < 0) {
130 tst_brkm(TBROK | TERRNO, cleanup,
131 "mount device:%s failed", device);
132 }
133 mount_flag_cur = 1;
134 }
135
mkdirat_verify(const struct test_case_t * test)136 static void mkdirat_verify(const struct test_case_t *test)
137 {
138 TEST(mkdirat(*test->dirfd, test->pathname, 0777));
139
140 if (TEST_RETURN != -1) {
141 tst_resm(TFAIL, "mkdirat() returned %ld, expected -1, errno=%d",
142 TEST_RETURN, test->exp_errno);
143 return;
144 }
145
146 if (TEST_ERRNO == test->exp_errno) {
147 tst_resm(TPASS | TTERRNO, "mkdirat() failed as expected");
148 } else {
149 tst_resm(TFAIL | TTERRNO,
150 "mkdirat() failed unexpectedly; expected: %d - %s",
151 test->exp_errno, strerror(test->exp_errno));
152 }
153 }
154
cleanup(void)155 static void cleanup(void)
156 {
157 if (mount_flag_dir && tst_umount("mntpoint") < 0)
158 tst_resm(TWARN | TERRNO, "umount device:%s failed", device);
159
160 if (mount_flag_cur && tst_umount("test_dir/mntpoint") < 0)
161 tst_resm(TWARN | TERRNO, "umount device:%s failed", device);
162
163 if (device)
164 tst_release_device(device);
165
166 tst_rmdir();
167 }
168