/*
* Copyright (c) International Business Machines Corp., 2001
* 07/2001 Ported by Wayne Boyer
* Copyright (c) 2017 Fujitsu Ltd.
* 04/2017 Modified by Jinhui Huang
*
* 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
*/
/*
* DESCRIPTION
* test 1:
* Read with an invalid file descriptor, and expect an EBADF.
*
* test 2:
* The parameter passed to read is a directory, check if the errno is
* set to EISDIR.
*
* test 3:
* Buf is outside the accessible address space, expect an EFAULT.
*
* test 4:
* The file was opened with the O_DIRECT flag, and transfer sizes was not
* multiples of the logical block size of the file system, expect an
* EINVAL.
*
* test 5:
* The file was opened with the O_DIRECT flag, and the alignment of the
* user buffer was not multiples of the logical block size of the file
* system, expect an EINVAL.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "tst_test.h"
static int badfd = -1;
static int fd2, fd3, fd4 = -1;
static char buf[BUFSIZ];
static void *bufaddr = buf;
static void *outside_buf = (void *)-1;
static void *addr4;
static void *addr5;
static long fs_type;
static struct tcase {
int *fd;
void **buf;
size_t count;
int exp_error;
} tcases[] = {
{&badfd, &bufaddr, 1, EBADF},
{&fd2, &bufaddr, 1, EISDIR},
#ifndef UCLINUX
{&fd3, &outside_buf, 1, EFAULT},
#endif
{&fd4, &addr4, 1, EINVAL},
{&fd4, &addr5, 4096, EINVAL},
};
static void verify_read(unsigned int n)
{
struct tcase *tc = &tcases[n];
if (tc->fd == &fd4 && *tc->fd == -1) {
tst_res(TCONF, "O_DIRECT not supported on %s filesystem",
tst_fs_type_name(fs_type));
return;
}
TEST(read(*tc->fd, *tc->buf, tc->count));
if (*tc->fd == fd4 && TEST_RETURN >= 0) {
tst_res(TPASS,
"O_DIRECT unaligned reads fallbacks to buffered I/O");
return;
}
if (TEST_RETURN != -1) {
tst_res(TFAIL, "read() succeeded unexpectedly");
return;
}
if (TEST_ERRNO == tc->exp_error) {
tst_res(TPASS | TTERRNO, "read() failed as expected");
} else {
tst_res(TFAIL | TTERRNO, "read() failed unexpectedly, "
"expected %s", tst_strerrno(tc->exp_error));
}
}
static void setup(void)
{
fd2 = SAFE_OPEN(".", O_DIRECTORY);
SAFE_FILE_PRINTF("test_file", "A");
fd3 = SAFE_OPEN("test_file", O_RDWR);
#if !defined(UCLINUX)
outside_buf = SAFE_MMAP(0, 1, PROT_NONE,
MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
#endif
addr4 = SAFE_MEMALIGN(getpagesize(), (4096 * 10));
addr5 = addr4 + 1;
fs_type = tst_fs_type(".");
if (fs_type != TST_TMPFS_MAGIC)
fd4 = SAFE_OPEN("test_file", O_RDWR | O_DIRECT);
}
static void cleanup(void)
{
free(addr4);
if (fd4 > 0)
SAFE_CLOSE(fd4);
if (fd3 > 0)
SAFE_CLOSE(fd3);
if (fd2 > 0)
SAFE_CLOSE(fd2);
}
static struct tst_test test = {
.tcnt = ARRAY_SIZE(tcases),
.test = verify_read,
.setup = setup,
.cleanup = cleanup,
.needs_tmpdir = 1,
};