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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2014 Fujitsu Ltd.
* Author: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
*/
/*
* DESCRIPTION
* check mkdirat() with various error conditions that should produce
* ELOOP and EROFS.
*/
#define _GNU_SOURCE
#include "tst_test.h"
#define MNT_POINT "mntpoint"
#define TEST_DIR "mntpoint/test_dir"
#define DIR_MODE (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP| \
S_IXGRP|S_IROTH|S_IXOTH)
static int dir_fd;
static int cur_fd = AT_FDCWD;
static char test_dir[PATH_MAX] = ".";
static struct tcase {
int *dirfd;
char *pathname;
int exp_errno;
} tcases[] = {
{&dir_fd, TEST_DIR, EROFS},
{&cur_fd, TEST_DIR, EROFS},
{&dir_fd, test_dir, ELOOP},
{&cur_fd, test_dir, ELOOP},
};
static void setup(void)
{
unsigned int i;
dir_fd = SAFE_OPEN(".", O_DIRECTORY);
SAFE_MKDIR("test_eloop", DIR_MODE);
SAFE_SYMLINK("../test_eloop", "test_eloop/test_eloop");
/*
* NOTE: the ELOOP test is written based on that the consecutive
* symlinks limits in kernel is hardwired to 40.
*/
for (i = 0; i < 43; i++)
strcat(test_dir, "/test_eloop");
}
static void mkdirat_verify(unsigned int i)
{
struct tcase *test = &tcases[i];
TEST(mkdirat(*test->dirfd, test->pathname, 0777));
if (TST_RET != -1) {
tst_res(TFAIL, "mkdirat() succeeded unexpectedly (%li)",
TST_RET);
return;
}
if (TST_ERR == test->exp_errno) {
tst_res(TPASS | TTERRNO, "mkdirat() failed as expected");
return;
}
tst_res(TFAIL | TTERRNO,
"mkdirat() failed unexpectedly; expected: %d - %s",
test->exp_errno, tst_strerrno(test->exp_errno));
}
static struct tst_test test = {
.setup = setup,
.test = mkdirat_verify,
.tcnt = ARRAY_SIZE(tcases),
.needs_root = 1,
.needs_rofs = 1,
.mntpoint = MNT_POINT,
};
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