| /* |
| * Copyright (c) 2014 Fujitsu Ltd. |
| * Author: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * Test Description: |
| * Verify that, |
| * 1. rename() fails with -1 return value and sets errno to ELOOP, if too |
| * many symbolic links were encountered in resolving oldpath or newpath. |
| * 2. rename() fails with -1 return value and sets errno to EROFS, |
| * if the file is on a read-only file system. |
| * 3. rename() fails with -1 return value and sets errno to EMLINK, |
| * if the file named by old is a directory and the link count of |
| * the parent directory of new would exceed {LINK_MAX}. |
| */ |
| |
| #include <stdio.h> |
| #include <errno.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <sys/mount.h> |
| |
| #include "test.h" |
| #include "safe_macros.h" |
| |
| char *TCID = "rename11"; |
| |
| #define MNTPOINT "mntpoint" |
| #define TEST_EROFS "mntpoint/test_erofs" |
| #define TEST_NEW_EROFS "mntpoint/new_test_erofs" |
| |
| #define TEST_EMLINK "test_emlink" |
| #define TEST_NEW_EMLINK "emlink_dir/testdir" |
| |
| #define TEST_NEW_ELOOP "new_test_eloop" |
| #define ELOPFILE "/test_eloop" |
| static char elooppathname[sizeof(ELOPFILE) * 43] = "."; |
| static int max_subdirs; |
| |
| static const char *device; |
| static const char *fs_type; |
| static int mount_flag; |
| |
| static void cleanup(void); |
| static void setup(void); |
| static void test_eloop(void); |
| static void test_erofs(void); |
| static void test_emlink(void); |
| |
| static void (*testfunc[])(void) = { test_eloop, test_erofs, test_emlink }; |
| |
| int TST_TOTAL = ARRAY_SIZE(testfunc); |
| |
| int main(int ac, char **av) |
| { |
| int lc, i; |
| const char *msg; |
| |
| msg = parse_opts(ac, av, NULL, NULL); |
| if (msg != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| tst_count = 0; |
| |
| for (i = 0; i < TST_TOTAL; i++) |
| (*testfunc[i])(); |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| static void setup(void) |
| { |
| int i; |
| |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| tst_require_root(NULL); |
| |
| tst_tmpdir(); |
| |
| TEST_PAUSE; |
| |
| fs_type = tst_dev_fs_type(); |
| device = tst_acquire_device(cleanup); |
| |
| if (!device) |
| tst_brkm(TCONF, cleanup, "Failed to obtain block device"); |
| |
| tst_mkfs(cleanup, device, fs_type, NULL); |
| |
| SAFE_MKDIR(cleanup, MNTPOINT, 0755); |
| if (mount(device, MNTPOINT, fs_type, 0, NULL) < 0) { |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "mount device:%s failed", device); |
| } |
| mount_flag = 1; |
| SAFE_TOUCH(cleanup, TEST_EROFS, 0644, NULL); |
| |
| SAFE_MKDIR(cleanup, TEST_EMLINK, 0755); |
| max_subdirs = tst_fs_fill_subdirs(cleanup, "emlink_dir"); |
| /* |
| * NOTE: the ELOOP test is written based on that the consecutive |
| * symlinks limits in kernel is hardwired to 40. |
| */ |
| SAFE_MKDIR(cleanup, "test_eloop", 0644); |
| SAFE_SYMLINK(cleanup, "../test_eloop", "test_eloop/test_eloop"); |
| for (i = 0; i < 43; i++) |
| strcat(elooppathname, ELOPFILE); |
| } |
| |
| static void check_and_print(int expected_errno) |
| { |
| if (TEST_RETURN == -1) { |
| if (TEST_ERRNO == expected_errno) { |
| tst_resm(TPASS | TTERRNO, "failed as expected"); |
| } else { |
| tst_resm(TFAIL | TTERRNO, |
| "failed unexpectedly; expected - %d : %s", |
| expected_errno, strerror(expected_errno)); |
| } |
| } else { |
| tst_resm(TFAIL, "rename succeeded unexpectedly"); |
| } |
| } |
| |
| static void test_eloop(void) |
| { |
| TEST(rename(elooppathname, TEST_NEW_ELOOP)); |
| check_and_print(ELOOP); |
| |
| if (TEST_RETURN == 0) |
| SAFE_UNLINK(cleanup, TEST_NEW_ELOOP); |
| } |
| |
| static void test_erofs(void) |
| { |
| if (mount(device, MNTPOINT, fs_type, MS_REMOUNT | MS_RDONLY, NULL) < 0) { |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "mount device:%s failed", device); |
| } |
| |
| TEST(rename(TEST_EROFS, TEST_NEW_EROFS)); |
| check_and_print(EROFS); |
| |
| if (TEST_RETURN == 0) |
| SAFE_UNLINK(cleanup, TEST_NEW_EROFS); |
| |
| if (mount(device, MNTPOINT, fs_type, MS_REMOUNT, NULL) < 0) { |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "remount device:%s failed", device); |
| } |
| } |
| |
| static void test_emlink(void) |
| { |
| if (max_subdirs == 0) { |
| tst_resm(TCONF, "EMLINK test is not appropriate"); |
| return; |
| } |
| |
| TEST(rename(TEST_EMLINK, TEST_NEW_EMLINK)); |
| check_and_print(EMLINK); |
| |
| if (TEST_RETURN == 0) |
| SAFE_RMDIR(cleanup, TEST_NEW_EMLINK); |
| } |
| |
| static void cleanup(void) |
| { |
| if (mount_flag && tst_umount(MNTPOINT) < 0) |
| tst_resm(TWARN | TERRNO, "umount device:%s failed", device); |
| |
| if (device) |
| tst_release_device(NULL, device); |
| |
| tst_rmdir(); |
| } |