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 u32 mask;
9 int wd;
10 u32 sync_cookie;
11 int name_len;
12 char name[];
13 };
14
15 struct inotify_inode_mark {
16 struct fsnotify_mark fsn_mark;
17 int wd;
18 };
19
INOTIFY_E(struct fsnotify_event * fse)20 static inline struct inotify_event_info *INOTIFY_E(struct fsnotify_event *fse)
21 {
22 return container_of(fse, struct inotify_event_info, fse);
23 }
24
25 /*
26 * INOTIFY_USER_FLAGS represents all of the mask bits that we expose to
27 * userspace. There is at least one bit (FS_EVENT_ON_CHILD) which is
28 * used only internally to the kernel.
29 */
30 #define INOTIFY_USER_MASK (IN_ALL_EVENTS | IN_ONESHOT | IN_EXCL_UNLINK)
31
inotify_mark_user_mask(struct fsnotify_mark * fsn_mark)32 static inline __u32 inotify_mark_user_mask(struct fsnotify_mark *fsn_mark)
33 {
34 return fsn_mark->mask & INOTIFY_USER_MASK;
35 }
36
37 extern void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
38 struct fsnotify_group *group);
39 extern int inotify_handle_event(struct fsnotify_group *group,
40 struct inode *inode,
41 u32 mask, const void *data, int data_type,
42 const struct qstr *file_name, u32 cookie,
43 struct fsnotify_iter_info *iter_info);
44
45 extern const struct fsnotify_ops inotify_fsnotify_ops;
46 extern struct kmem_cache *inotify_inode_mark_cachep;
47
48 #ifdef CONFIG_INOTIFY_USER
dec_inotify_instances(struct ucounts * ucounts)49 static inline void dec_inotify_instances(struct ucounts *ucounts)
50 {
51 dec_ucount(ucounts, UCOUNT_INOTIFY_INSTANCES);
52 }
53
inc_inotify_watches(struct ucounts * ucounts)54 static inline struct ucounts *inc_inotify_watches(struct ucounts *ucounts)
55 {
56 return inc_ucount(ucounts->ns, ucounts->uid, UCOUNT_INOTIFY_WATCHES);
57 }
58
dec_inotify_watches(struct ucounts * ucounts)59 static inline void dec_inotify_watches(struct ucounts *ucounts)
60 {
61 dec_ucount(ucounts, UCOUNT_INOTIFY_WATCHES);
62 }
63 #endif
64