185 lines
4.4 KiB
C
185 lines
4.4 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 it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/*
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* Description:
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* Verify that,
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* 1) mknod(2) returns -1 and sets errno to EROFS if pathname refers to
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* a file on a read-only file system.
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* 2) mknod(2) returns -1 and sets errno to ELOOP if Too many symbolic
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* links were encountered in resolving pathname.
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*/
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#define _GNU_SOURCE
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#include <sys/types.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <string.h>
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#include <signal.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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#include "lapi/fcntl.h"
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#include "mknodat.h"
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static void setup(void);
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static void cleanup(void);
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#define DIR_MODE (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP| \
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S_IXGRP|S_IROTH|S_IXOTH)
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#define MNT_POINT "mntpoint"
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#define FIFOMODE (S_IFIFO | S_IRUSR | S_IRGRP | S_IROTH)
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#define FREGMODE (S_IFREG | S_IRUSR | S_IRGRP | S_IROTH)
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#define SOCKMODE (S_IFSOCK | S_IRUSR | S_IRGRP | S_IROTH)
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static const char *device;
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static int mount_flag;
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static int dir_fd;
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static int curfd = AT_FDCWD;
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#define ELOPFILE "/test_eloop"
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static char elooppathname[sizeof(ELOPFILE) * 43] = ".";
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static struct test_case_t {
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int *dir_fd;
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char *pathname;
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mode_t mode;
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int exp_errno;
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} test_cases[] = {
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{ &curfd, "tnode1", FIFOMODE, 0 },
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{ &curfd, "tnode2", FREGMODE, 0 },
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{ &curfd, "tnode3", SOCKMODE, 0 },
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{ &dir_fd, "tnode4", FIFOMODE, EROFS },
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{ &dir_fd, "tnode5", FREGMODE, EROFS },
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{ &dir_fd, "tnode6", SOCKMODE, EROFS },
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{ &curfd, elooppathname, FIFOMODE, ELOOP },
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{ &curfd, elooppathname, FREGMODE, ELOOP },
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{ &curfd, elooppathname, SOCKMODE, ELOOP },
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};
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static void mknodat_verify(struct test_case_t *tc);
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char *TCID = "mknodat";
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int TST_TOTAL = ARRAY_SIZE(test_cases);
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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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mknodat_verify(&test_cases[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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const char *fs_type;
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if (tst_kvercmp(2, 6, 16) < 0) {
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tst_brkm(TCONF, NULL, "This test can only run on kernels "
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"that are 2.6.16 and higher");
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}
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tst_require_root();
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tst_sig(NOFORK, DEF_HANDLER, cleanup);
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tst_tmpdir();
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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 acquire device");
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tst_mkfs(cleanup, device, fs_type, NULL, NULL);
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TEST_PAUSE;
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/*
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* mount a read-only file system for EROFS test
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*/
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SAFE_MKDIR(cleanup, MNT_POINT, DIR_MODE);
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SAFE_MOUNT(cleanup, device, MNT_POINT, fs_type, MS_RDONLY, NULL);
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mount_flag = 1;
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dir_fd = SAFE_OPEN(cleanup, MNT_POINT, O_DIRECTORY);
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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", DIR_MODE);
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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 mknodat_verify(struct test_case_t *tc)
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{
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int fd = *(tc->dir_fd);
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char *pathname = tc->pathname;
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mode_t mode = tc->mode;
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TEST(mknodat(fd, pathname, mode, 0));
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if (TEST_ERRNO == tc->exp_errno) {
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tst_resm(TPASS | TTERRNO,
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"mknodat() returned the expected value");
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} else {
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tst_resm(TFAIL | TTERRNO,
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"mknodat() got unexpected return value; expected: "
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"%d - %s", tc->exp_errno,
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strerror(tc->exp_errno));
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}
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if (TEST_ERRNO == 0 &&
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ltp_syscall(__NR_unlinkat, fd, pathname, 0) < 0) {
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tst_brkm(TBROK | TERRNO, cleanup, "unlinkat(%d, %s) "
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"failed.", fd, pathname);
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}
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}
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static void cleanup(void)
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{
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if (dir_fd > 0 && close(dir_fd) < 0)
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tst_resm(TWARN | TERRNO, "close(%d) failed", dir_fd);
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if (mount_flag && tst_umount(MNT_POINT) < 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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