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