1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2024 SUSE LLC Andrea Cervesato <andrea.cervesato@suse.com>
4 */
5
6 /*\
7 * [Description]
8 *
9 * This test verifies that statmount() is correctly reading propagation from
10 * what mount in current namespace using STATMOUNT_PROPAGATE_FROM.
11 *
12 * [Algorithm]
13 *
14 * - create a mount point
15 * - propagate a mounted folder inside the mount point
16 * - run statmount() on the mount point using STATMOUNT_PROPAGATE_FROM
17 * - read results and check propagated_from parameter contains the propagated
18 * folder ID
19 */
20
21 #define _GNU_SOURCE
22
23 #include "statmount.h"
24 #include "lapi/stat.h"
25 #include "lapi/sched.h"
26
27 #define MNTPOINT "mntpoint"
28 #define DIR_A MNTPOINT "/LTP_DIR_A"
29 #define DIR_C_SUBFOLDER "/LTP_DIR_A/propagated"
30 #define DIR_C (MNTPOINT DIR_C_SUBFOLDER)
31 #define DIR_B MNTPOINT "/LTP_DIR_B"
32 #define DIR_D MNTPOINT "/LTP_DIR_B/propagated"
33
34 static uint64_t peer_group_id;
35 static uint64_t dird_id;
36 static struct statmount *st_mount;
37
run(void)38 static void run(void)
39 {
40 memset(st_mount, 0, sizeof(struct statmount));
41
42 TST_EXP_PASS(statmount(dird_id, STATMOUNT_PROPAGATE_FROM, st_mount,
43 sizeof(struct statmount), 0));
44
45 if (!TST_PASS)
46 return;
47
48 TST_EXP_EQ_LI(st_mount->mask, STATMOUNT_PROPAGATE_FROM);
49 TST_EXP_EQ_LI(st_mount->size, sizeof(struct statmount));
50 TST_EXP_EQ_LI(st_mount->propagate_from, peer_group_id);
51 }
52
setup(void)53 static void setup(void)
54 {
55 struct ltp_statx sx;
56
57 /* create DIR_A / DIR_C structure with DIR_C mounted */
58 SAFE_MKDIR(DIR_A, 0700);
59 SAFE_MOUNT(DIR_A, DIR_A, "none", MS_BIND, NULL);
60 SAFE_MOUNT("none", DIR_A, "none", MS_SHARED, NULL);
61
62 SAFE_MKDIR(DIR_C, 0700);
63 SAFE_MOUNT(DIR_C, DIR_C, "none", MS_BIND, NULL);
64 SAFE_MOUNT("none", DIR_C, "none", MS_SHARED, NULL);
65
66 /* DIR_A mounts into DIR_B. DIR_D is propagated */
67 SAFE_MKDIR(DIR_B, 0700);
68 SAFE_MOUNT(DIR_A, DIR_B, "none", MS_BIND, NULL);
69 SAFE_MOUNT("none", DIR_B, "none", MS_SLAVE, NULL);
70
71 SAFE_STATX(AT_FDCWD, DIR_D, 0, STATX_MNT_ID_UNIQUE, &sx);
72 dird_id = sx.data.stx_mnt_id;
73
74 peer_group_id = read_peer_group(DIR_A);
75 }
76
cleanup(void)77 static void cleanup(void)
78 {
79 if (tst_is_mounted(DIR_C))
80 SAFE_UMOUNT(DIR_C);
81
82 if (tst_is_mounted(DIR_B))
83 SAFE_UMOUNT(DIR_B);
84
85 if (tst_is_mounted(DIR_A))
86 SAFE_UMOUNT(DIR_A);
87 }
88
89 static struct tst_test test = {
90 .test_all = run,
91 .setup = setup,
92 .cleanup = cleanup,
93 .min_kver = "6.8",
94 .mount_device = 1,
95 .mntpoint = MNTPOINT,
96 .all_filesystems = 1,
97 .skip_filesystems = (const char *const []) {
98 "fuse",
99 NULL
100 },
101 .bufs = (struct tst_buffers []) {
102 {&st_mount, .size = sizeof(struct statmount)},
103 {}
104 }
105 };
106