1 /* SPDX-License-Identifier: GPL-2.0 */
2 #include <linux/fsnotify_backend.h>
3 #include <linux/inotify.h>
4 #include <linux/slab.h> /* struct kmem_cache */
5
6 struct inotify_event_info {
7 struct fsnotify_event fse;
8 int wd;
9 u32 sync_cookie;
10 int name_len;
11 char name[];
12 };
13
14 struct inotify_inode_mark {
15 struct fsnotify_mark fsn_mark;
16 int wd;
17 };
18
INOTIFY_E(struct fsnotify_event * fse)19 static inline struct inotify_event_info *INOTIFY_E(struct fsnotify_event *fse)
20 {
21 return container_of(fse, struct inotify_event_info, fse);
22 }
23
24 /*
25 * INOTIFY_USER_FLAGS represents all of the mask bits that we expose to
26 * userspace. There is at least one bit (FS_EVENT_ON_CHILD) which is
27 * used only internally to the kernel.
28 */
29 #define INOTIFY_USER_MASK (IN_ALL_EVENTS | IN_ONESHOT | IN_EXCL_UNLINK)
30
inotify_mark_user_mask(struct fsnotify_mark * fsn_mark)31 static inline __u32 inotify_mark_user_mask(struct fsnotify_mark *fsn_mark)
32 {
33 return fsn_mark->mask & INOTIFY_USER_MASK;
34 }
35
36 extern void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
37 struct fsnotify_group *group);
38 extern int inotify_handle_event(struct fsnotify_group *group,
39 struct inode *inode,
40 u32 mask, const void *data, int data_type,
41 const unsigned char *file_name, u32 cookie,
42 struct fsnotify_iter_info *iter_info);
43
44 extern const struct fsnotify_ops inotify_fsnotify_ops;
45 extern struct kmem_cache *inotify_inode_mark_cachep;
46
47 #ifdef CONFIG_INOTIFY_USER
dec_inotify_instances(struct ucounts * ucounts)48 static inline void dec_inotify_instances(struct ucounts *ucounts)
49 {
50 dec_ucount(ucounts, UCOUNT_INOTIFY_INSTANCES);
51 }
52
inc_inotify_watches(struct ucounts * ucounts)53 static inline struct ucounts *inc_inotify_watches(struct ucounts *ucounts)
54 {
55 return inc_ucount(ucounts->ns, ucounts->uid, UCOUNT_INOTIFY_WATCHES);
56 }
57
dec_inotify_watches(struct ucounts * ucounts)58 static inline void dec_inotify_watches(struct ucounts *ucounts)
59 {
60 dec_ucount(ucounts, UCOUNT_INOTIFY_WATCHES);
61 }
62 #endif
63