Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 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 |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU Library General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 18 | * |
| 19 | */ |
| 20 | /* |
| 21 | * Test Description: |
| 22 | * Verify that, |
| 23 | * 1. link() fails with -1 return value and sets errno to EPERM |
| 24 | * if oldpath is a directory. |
| 25 | * 2. link() fails with -1 return value and sets errno to EXDEV |
| 26 | * if oldpath and newpath are not on the same mounted file system( Linux |
| 27 | * permits a file system to be mounted at multiple points, but link() |
| 28 | * does not work across different mount points, even if the same |
| 29 | * file system is mounted on both. ). |
| 30 | * 3. link() fails with -1 return value and sets errno to EROFS |
| 31 | * if the file is on a read-only file system. |
| 32 | * 4. link() fails with -1 return value and sets errno to ELOOP |
| 33 | * if too many symbolic links were encountered in resolving path. |
| 34 | */ |
| 35 | |
| 36 | #include <stdio.h> |
| 37 | #include <stdlib.h> |
| 38 | #include <unistd.h> |
| 39 | #include <fcntl.h> |
| 40 | #include <errno.h> |
| 41 | #include <string.h> |
| 42 | #include <signal.h> |
| 43 | #include <sys/types.h> |
| 44 | #include <sys/stat.h> |
| 45 | #include <pwd.h> |
| 46 | #include <sys/mount.h> |
| 47 | |
| 48 | #include "test.h" |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 49 | #include "safe_macros.h" |
| 50 | |
| 51 | #define DIR_MODE (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP| \ |
| 52 | S_IXGRP|S_IROTH|S_IXOTH) |
| 53 | #define MNT_POINT "mntpoint" |
| 54 | #define TEST_FILE "testfile" |
| 55 | #define TEST_FILE1 "testfile1" |
| 56 | #define TEST_FILE2 "mntpoint/testfile3" |
| 57 | #define TEST_FILE3 "mntpoint/testfile4" |
| 58 | |
| 59 | static char test_file4[PATH_MAX] = "."; |
| 60 | static void setup(void); |
| 61 | static void cleanup(void); |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 62 | |
Cyril Hrubis | 6383fd9 | 2014-06-19 17:06:46 +0200 | [diff] [blame] | 63 | static const char *device; |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 64 | static int mount_flag; |
| 65 | |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 66 | static struct test_case_t { |
| 67 | char *oldpath; |
| 68 | char *newpath; |
| 69 | int exp_errno; |
| 70 | } test_cases[] = { |
| 71 | {TEST_FILE1, TEST_FILE, EPERM}, |
| 72 | {TEST_FILE2, TEST_FILE, EXDEV}, |
| 73 | {TEST_FILE2, TEST_FILE3, EROFS}, |
| 74 | {test_file4, TEST_FILE, ELOOP}, |
| 75 | }; |
| 76 | |
| 77 | static void link_verify(const struct test_case_t *); |
| 78 | |
| 79 | char *TCID = "link08"; |
| 80 | int TST_TOTAL = ARRAY_SIZE(test_cases); |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 81 | |
| 82 | int main(int ac, char **av) |
| 83 | { |
| 84 | int i, lc; |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 85 | |
Cyril Hrubis | d6d11d0 | 2015-03-09 17:35:43 +0100 | [diff] [blame^] | 86 | tst_parse_opts(ac, av, NULL, NULL); |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 87 | |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 88 | setup(); |
| 89 | |
| 90 | for (lc = 0; TEST_LOOPING(lc); lc++) { |
| 91 | tst_count = 0; |
| 92 | for (i = 0; i < TST_TOTAL; i++) |
| 93 | link_verify(&test_cases[i]); |
| 94 | } |
| 95 | |
| 96 | cleanup(); |
| 97 | tst_exit(); |
| 98 | |
| 99 | } |
| 100 | |
| 101 | static void link_verify(const struct test_case_t *tc) |
| 102 | { |
| 103 | TEST(link(tc->oldpath, tc->newpath)); |
| 104 | |
| 105 | if (TEST_RETURN != -1) { |
| 106 | tst_resm(TFAIL, "link succeeded unexpectedly"); |
| 107 | return; |
| 108 | } |
| 109 | |
| 110 | if (TEST_ERRNO == tc->exp_errno) { |
| 111 | tst_resm(TPASS | TTERRNO, "link failed as expected"); |
| 112 | } else { |
| 113 | tst_resm(TFAIL | TTERRNO, |
| 114 | "link failed unexpectedly; expected: %d - %s", |
| 115 | tc->exp_errno, strerror(tc->exp_errno)); |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | |
| 120 | static void setup(void) |
| 121 | { |
| 122 | int i; |
Cyril Hrubis | 6383fd9 | 2014-06-19 17:06:46 +0200 | [diff] [blame] | 123 | const char *fs_type; |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 124 | |
| 125 | tst_require_root(NULL); |
| 126 | |
| 127 | tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| 128 | |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 129 | TEST_PAUSE; |
| 130 | |
| 131 | tst_tmpdir(); |
| 132 | |
Cyril Hrubis | 6383fd9 | 2014-06-19 17:06:46 +0200 | [diff] [blame] | 133 | fs_type = tst_dev_fs_type(); |
| 134 | device = tst_acquire_device(cleanup); |
| 135 | |
| 136 | if (!device) |
| 137 | tst_brkm(TCONF, cleanup, "Failed to acquire device"); |
| 138 | |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 139 | SAFE_MKDIR(cleanup, TEST_FILE1, DIR_MODE); |
| 140 | |
| 141 | SAFE_MKDIR(cleanup, "test_eloop", DIR_MODE); |
| 142 | SAFE_SYMLINK(cleanup, "../test_eloop", "test_eloop/test_eloop"); |
| 143 | for (i = 0; i < 43; i++) |
| 144 | strcat(test_file4, "/test_eloop"); |
| 145 | |
Cyril Hrubis | 6383fd9 | 2014-06-19 17:06:46 +0200 | [diff] [blame] | 146 | tst_mkfs(cleanup, device, fs_type, NULL); |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 147 | SAFE_MKDIR(cleanup, MNT_POINT, DIR_MODE); |
Cyril Hrubis | 6383fd9 | 2014-06-19 17:06:46 +0200 | [diff] [blame] | 148 | if (mount(device, MNT_POINT, fs_type, 0, NULL) < 0) { |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 149 | tst_brkm(TBROK | TERRNO, cleanup, |
| 150 | "mount device:%s failed", device); |
| 151 | } |
| 152 | mount_flag = 1; |
| 153 | |
| 154 | SAFE_TOUCH(cleanup, TEST_FILE2, 0644, NULL); |
Cyril Hrubis | 6383fd9 | 2014-06-19 17:06:46 +0200 | [diff] [blame] | 155 | if (mount(device, MNT_POINT, fs_type, |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 156 | MS_REMOUNT | MS_RDONLY, NULL) < 0) { |
| 157 | tst_brkm(TBROK | TERRNO, cleanup, |
| 158 | "mount device:%s failed", device); |
| 159 | } |
| 160 | } |
| 161 | |
| 162 | static void cleanup(void) |
| 163 | { |
Cyril Hrubis | c60a230 | 2015-01-29 16:28:24 +0100 | [diff] [blame] | 164 | if (mount_flag && tst_umount(MNT_POINT) < 0) |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 165 | tst_resm(TWARN | TERRNO, "umount device:%s failed", device); |
| 166 | |
Cyril Hrubis | 6383fd9 | 2014-06-19 17:06:46 +0200 | [diff] [blame] | 167 | if (device) |
| 168 | tst_release_device(NULL, device); |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 169 | |
Cyril Hrubis | 6383fd9 | 2014-06-19 17:06:46 +0200 | [diff] [blame] | 170 | tst_rmdir(); |
Zeng Linggang | 6314720 | 2014-02-18 22:00:18 +0800 | [diff] [blame] | 171 | } |