1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2017 Cyril Hrubis <[email protected]>
4 */
5
6 /*\
7 * [Description]
8 *
9 * Basic test for the BLKRASET and BLKRAGET ioctls.
10 *
11 * Sets device read-ahead, reads it back and compares the values.
12 *
13 * The read-ahead value was choosen to be multiple of 512, since it's rounded
14 * based on page size on BLKRASET and 512 should be safe enough for everyone.
15 */
16
17 #include <errno.h>
18 #include <sys/mount.h>
19 #include "tst_test.h"
20
21 static int fd;
22
verify_ioctl(void)23 static void verify_ioctl(void)
24 {
25 unsigned long ra, rab, rao;
26
27 SAFE_IOCTL(fd, BLKRAGET, &rao);
28
29 tst_res(TINFO, "BLKRAGET original value %lu", rao);
30
31 for (ra = 0; ra <= 4096; ra += 512) {
32 SAFE_IOCTL(fd, BLKRASET, ra);
33 SAFE_IOCTL(fd, BLKRAGET, &rab);
34
35 if (ra == rab)
36 tst_res(TPASS, "BLKRASET %lu read back correctly", ra);
37 else
38 tst_res(TFAIL, "BLKRASET %lu read back %lu", ra, rab);
39 }
40
41 tst_res(TINFO, "BLKRASET restoring original value %lu", rao);
42
43 SAFE_IOCTL(fd, BLKRASET, rao);
44 }
45
setup(void)46 static void setup(void)
47 {
48 fd = SAFE_OPEN(tst_device->dev, O_RDONLY);
49 }
50
cleanup(void)51 static void cleanup(void)
52 {
53 if (fd > 0)
54 SAFE_CLOSE(fd);
55 }
56
57 static struct tst_test test = {
58 .needs_root = 1,
59 .needs_device = 1,
60 .setup = setup,
61 .cleanup = cleanup,
62 .test_all = verify_ioctl,
63 };
64