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 BLKGETSIZE and BLKGETSIZE64 ioctls.
10 *
11 * - BLKGETSIZE returns size in 512 byte blocks BLKGETSIZE64 in bytes
12 * compare that they return the same value.
13 * - lseek to the end of the device, this should work
14 * - try to read from the device, read should return 0
15 */
16
17 #include <stdint.h>
18 #include <errno.h>
19 #include <sys/mount.h>
20 #include "tst_test.h"
21
22 static int fd;
23
verify_ioctl(void)24 static void verify_ioctl(void)
25 {
26 unsigned long size = 0;
27 uint64_t size64 = 0;
28 char buf;
29 int ret;
30
31 fd = SAFE_OPEN(tst_device->dev, O_RDONLY);
32
33 SAFE_IOCTL(fd, BLKGETSIZE, &size);
34 SAFE_IOCTL(fd, BLKGETSIZE64, &size64);
35
36 if (size == size64/512) {
37 tst_res(TPASS, "BLKGETSIZE returned %lu, BLKGETSIZE64 %llu",
38 size, (unsigned long long)size64);
39 } else {
40 tst_res(TFAIL,
41 "BLKGETSIZE returned %lu, BLKGETSIZE64 returned %llu",
42 size, (unsigned long long)size64);
43 }
44
45 if (lseek(fd, size * 512, SEEK_SET) != (off_t)size * 512) {
46 tst_res(TFAIL | TERRNO,
47 "Cannot lseek to the end of the device");
48 } else {
49 tst_res(TPASS, "Could lseek to the end of the device");
50 }
51
52 ret = read(fd, &buf, 1);
53
54 if (ret == 0) {
55 tst_res(TPASS,
56 "Got EOF when trying to read after the end of device");
57 } else {
58 tst_res(TFAIL | TERRNO,
59 "Read at the end of device returned %i", ret);
60 }
61
62 SAFE_CLOSE(fd);
63 }
64
cleanup(void)65 static void cleanup(void)
66 {
67 if (fd > 0)
68 SAFE_CLOSE(fd);
69 }
70
71 static struct tst_test test = {
72 .needs_device = 1,
73 .needs_root = 1,
74 .cleanup = cleanup,
75 .test_all = verify_ioctl,
76 };
77