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 BLKGETSIZE and BLKGETSIZE64 ioctls.
19 *
20 * - BLKGETSIZE returns size in 512 byte blocks BLKGETSIZE64 in bytes
21 * compare that they return the same value.
22 * - lseek to the end of the device, this should work
23 * - try to read from the device, read should return 0
24 */
25
26 #include <stdint.h>
27 #include <errno.h>
28 #include <sys/mount.h>
29 #include "tst_test.h"
30
31 static int fd;
32
verify_ioctl(void)33 static void verify_ioctl(void)
34 {
35 unsigned long size = 0;
36 uint64_t size64 = 0;
37 char buf;
38 int ret;
39
40 fd = SAFE_OPEN(tst_device->dev, O_RDONLY);
41
42 SAFE_IOCTL(fd, BLKGETSIZE, &size);
43 SAFE_IOCTL(fd, BLKGETSIZE64, &size64);
44
45 if (size == size64/512) {
46 tst_res(TPASS, "BLKGETSIZE returned %lu, BLKGETSIZE64 %llu",
47 size, (unsigned long long)size64);
48 } else {
49 tst_res(TFAIL,
50 "BLKGETSIZE returned %lu, BLKGETSIZE64 returned %llu",
51 size, (unsigned long long)size64);
52 }
53
54 if (lseek(fd, size * 512, SEEK_SET) != (off_t)size * 512) {
55 tst_res(TFAIL | TERRNO,
56 "Cannot lseek to the end of the device");
57 } else {
58 tst_res(TPASS, "Could lseek to the end of the device");
59 }
60
61 ret = read(fd, &buf, 1);
62
63 if (ret == 0) {
64 tst_res(TPASS,
65 "Got EOF when trying to read after the end of device");
66 } else {
67 tst_res(TFAIL | TERRNO,
68 "Read at the end of device returned %i", ret);
69 }
70
71 SAFE_CLOSE(fd);
72 }
73
cleanup(void)74 static void cleanup(void)
75 {
76 if (fd > 0)
77 SAFE_CLOSE(fd);
78 }
79
80 static struct tst_test test = {
81 .needs_device = 1,
82 .needs_root = 1,
83 .cleanup = cleanup,
84 .test_all = verify_ioctl,
85 };
86