1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2017 Cyril Hrubis <chrubis@suse.cz>
4 */
5 /*
6 * Basic test for the BLKROSET and BLKROGET ioctls.
7 *
8 * - Set the device read only, read the value back.
9 * - Try to mount the device read write, expect failure.
10 * - Try to mount the device read only, expect success.
11 */
12
13 #include <errno.h>
14 #include <sys/mount.h>
15 #include "tst_test.h"
16
17 static int fd;
18
verify_ioctl(void)19 static void verify_ioctl(void)
20 {
21 int ro = 1;
22
23 SAFE_IOCTL(fd, BLKROGET, &ro);
24
25 if (ro == 0)
26 tst_res(TPASS, "BLKROGET returned 0");
27 else
28 tst_res(TFAIL, "BLKROGET returned %i", ro);
29
30 ro = 1;
31 SAFE_IOCTL(fd, BLKROSET, &ro);
32
33 ro = 0;
34 SAFE_IOCTL(fd, BLKROGET, &ro);
35
36 if (ro == 0)
37 tst_res(TFAIL, "BLKROGET returned 0");
38 else
39 tst_res(TPASS, "BLKROGET returned %i", ro);
40
41 TEST(mount(tst_device->dev, "mntpoint", tst_device->fs_type, 0, NULL));
42
43 if (TST_RET != -1) {
44 tst_res(TFAIL, "Mounting RO device RW succeeded");
45 tst_umount("mntpoint");
46 goto next;
47 }
48
49 if (TST_ERR == EACCES) {
50 tst_res(TPASS | TERRNO, "Mounting RO device RW failed");
51 goto next;
52 }
53
54 tst_res(TFAIL | TERRNO,
55 "Mounting RO device RW failed unexpectedly expected EACCES");
56
57 next:
58 TEST(mount(tst_device->dev, "mntpoint", tst_device->fs_type, MS_RDONLY, NULL));
59
60 if (TST_RET == 0) {
61 tst_res(TPASS, "Mounting RO device RO works");
62 tst_umount("mntpoint");
63 } else {
64 tst_res(TFAIL | TTERRNO, "Mounting RO device RO failed");
65 }
66
67 ro = 0;
68 SAFE_IOCTL(fd, BLKROSET, &ro);
69 }
70
setup(void)71 static void setup(void)
72 {
73 SAFE_MKDIR("mntpoint", 0777);
74 fd = SAFE_OPEN(tst_device->dev, O_RDONLY);
75 }
76
cleanup(void)77 static void cleanup(void)
78 {
79 if (fd > 0)
80 SAFE_CLOSE(fd);
81 }
82
83 static struct tst_test test = {
84 .format_device = 1,
85 .needs_root = 1,
86 .setup = setup,
87 .cleanup = cleanup,
88 .test_all = verify_ioctl,
89 };
90