1/*
2 * Copyright (c) 2017 Cyril Hrubis <chrubis@suse.cz>
3 *
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17/*
18 * Basic test for the BLKRASET and BLKRAGET ioctls.
19 *
20 * Sets device read-ahead, reads it back and compares the values.
21 *
22 * The read-ahead value was choosen to be multiple of 512, since it's rounded
23 * based on page size on BLKRASET and 512 should be safe enough for everyone.
24 */
25
26#include <errno.h>
27#include <sys/mount.h>
28#include "tst_test.h"
29
30static int fd;
31
32static void verify_ioctl(void)
33{
34	unsigned long ra, rab, rao;
35
36	SAFE_IOCTL(fd, BLKRAGET, &rao);
37
38	tst_res(TINFO, "BLKRAGET original value %lu", rao);
39
40	for (ra = 0; ra <= 4096; ra += 512) {
41		SAFE_IOCTL(fd, BLKRASET, ra);
42		SAFE_IOCTL(fd, BLKRAGET, &rab);
43
44		if (ra == rab)
45			tst_res(TPASS, "BLKRASET %lu read back correctly", ra);
46		else
47			tst_res(TFAIL, "BLKRASET %lu read back %lu", ra, rab);
48	}
49
50	tst_res(TINFO, "BLKRASET restoring original value %lu", rao);
51
52	SAFE_IOCTL(fd, BLKRASET, rao);
53}
54
55static void setup(void)
56{
57	fd = SAFE_OPEN(tst_device->dev, O_RDONLY);
58}
59
60static void cleanup(void)
61{
62	if (fd > 0)
63		SAFE_CLOSE(fd);
64}
65
66static struct tst_test test = {
67	.needs_root = 1,
68	.needs_device = 1,
69	.setup = setup,
70	.cleanup = cleanup,
71	.test_all = verify_ioctl,
72};
73