1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2008 Parallels. All Rights Reserved.
4 * Author: Andrew Vagin <avagin@gmail.com>
5 *
6 * DESCRIPTION
7 * Check that inotify get IN_UNMOUNT event and
8 * don't block the umount command.
9 *
10 * ALGORITHM
11 * Execute sequence file's operation and check return events
12 */
13
14 #include "config.h"
15
16 #include <stdio.h>
17 #include <sys/mount.h>
18 #include <sys/stat.h>
19 #include <sys/types.h>
20 #include <fcntl.h>
21 #include <errno.h>
22 #include <string.h>
23 #include <sys/syscall.h>
24 #include <signal.h>
25 #include "tst_test.h"
26 #include "inotify.h"
27
28 #if defined(HAVE_SYS_INOTIFY_H)
29 #include <sys/inotify.h>
30
31 #define EVENT_MAX 1024
32 /* size of the event structure, not counting name */
33 #define EVENT_SIZE (sizeof(struct inotify_event))
34 /* reasonable guess as to size of 1024 events */
35 #define EVENT_BUF_LEN (EVENT_MAX * (EVENT_SIZE + 16))
36
37 #define BUF_SIZE 1024
38 static char fname[BUF_SIZE];
39 static int fd, fd_notify;
40 static int wd;
41
42 static unsigned int event_set[EVENT_MAX];
43
44 static char event_buf[EVENT_BUF_LEN];
45
46 #define DIR_MODE (S_IRWXU | S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP)
47
48 static char *mntpoint = "mntpoint";
49 static int mount_flag;
50
verify_inotify(void)51 void verify_inotify(void)
52 {
53 int ret;
54 int len, i, test_num;
55
56 int test_cnt = 0;
57
58 SAFE_MOUNT(tst_device->dev, mntpoint, tst_device->fs_type, 0, NULL);
59 mount_flag = 1;
60
61 wd = SAFE_MYINOTIFY_ADD_WATCH(fd_notify, fname, IN_ALL_EVENTS);
62
63 event_set[test_cnt] = IN_UNMOUNT;
64 test_cnt++;
65 event_set[test_cnt] = IN_IGNORED;
66 test_cnt++;
67
68 /*check exit code from inotify_rm_watch */
69 test_cnt++;
70
71 tst_res(TINFO, "umount %s", tst_device->dev);
72 TEST(tst_umount(mntpoint));
73 if (TST_RET != 0) {
74 tst_brk(TBROK, "umount(2) Failed "
75 "while unmounting errno = %d : %s",
76 TST_ERR, strerror(TST_ERR));
77 }
78 mount_flag = 0;
79
80 len = read(fd_notify, event_buf, EVENT_BUF_LEN);
81 if (len < 0) {
82 tst_brk(TBROK | TERRNO,
83 "read(%d, buf, %zu) failed", fd_notify, EVENT_BUF_LEN);
84 }
85
86 /* check events */
87 test_num = 0;
88 i = 0;
89 while (i < len) {
90 struct inotify_event *event;
91 event = (struct inotify_event *)&event_buf[i];
92 if (test_num >= (test_cnt - 1)) {
93 tst_res(TFAIL,
94 "get unnecessary event: wd=%d mask=%x "
95 "cookie=%u len=%u",
96 event->wd, event->mask,
97 event->cookie, event->len);
98 } else if (event_set[test_num] == event->mask) {
99 tst_res(TPASS, "get event: wd=%d mask=%x"
100 " cookie=%u len=%u",
101 event->wd, event->mask,
102 event->cookie, event->len);
103
104 } else {
105 tst_res(TFAIL, "get event: wd=%d mask=%x "
106 "(expected %x) cookie=%u len=%u",
107 event->wd, event->mask,
108 event_set[test_num],
109 event->cookie, event->len);
110 }
111 test_num++;
112 i += EVENT_SIZE + event->len;
113 }
114 for (; test_num < test_cnt - 1; test_num++) {
115 tst_res(TFAIL, "don't get event: mask=%x ",
116 event_set[test_num]);
117
118 }
119 ret = myinotify_rm_watch(fd_notify, wd);
120 if (ret != -1 || errno != EINVAL)
121 tst_res(TFAIL | TERRNO,
122 "inotify_rm_watch (%d, %d) didn't return EINVAL",
123 fd_notify, wd);
124 else
125 tst_res(TPASS, "inotify_rm_watch (%d, %d) returned EINVAL",
126 fd_notify, wd);
127 }
128
setup(void)129 static void setup(void)
130 {
131 int ret;
132
133 SAFE_MKDIR(mntpoint, DIR_MODE);
134
135 SAFE_MOUNT(tst_device->dev, mntpoint, tst_device->fs_type, 0, NULL);
136 mount_flag = 1;
137
138 sprintf(fname, "%s/tfile_%d", mntpoint, getpid());
139 fd = SAFE_OPEN(fname, O_RDWR | O_CREAT, 0700);
140
141 ret = write(fd, fname, 1);
142 if (ret == -1) {
143 tst_brk(TBROK | TERRNO,
144 "write(%d, %s, 1) failed", fd, fname);
145 }
146
147 /* close the file we have open */
148 SAFE_CLOSE(fd);
149
150 fd_notify = SAFE_MYINOTIFY_INIT();
151
152 tst_umount(mntpoint);
153 mount_flag = 0;
154 }
155
cleanup(void)156 static void cleanup(void)
157 {
158 if (fd_notify > 0)
159 SAFE_CLOSE(fd_notify);
160
161 if (mount_flag) {
162 TEST(tst_umount(mntpoint));
163 if (TST_RET != 0)
164 tst_res(TWARN | TTERRNO, "umount(%s) failed",
165 mntpoint);
166 }
167 }
168
169 static struct tst_test test = {
170 .needs_root = 1,
171 .format_device = 1,
172 .setup = setup,
173 .cleanup = cleanup,
174 .test_all = verify_inotify,
175 };
176
177 #else
178 TST_TEST_TCONF("system doesn't have required inotify support");
179 #endif
180