1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __FS_NOTIFY_FSNOTIFY_H_
3#define __FS_NOTIFY_FSNOTIFY_H_
4
5#include <linux/list.h>
6#include <linux/fsnotify.h>
7#include <linux/srcu.h>
8#include <linux/types.h>
9
10#include "../mount.h"
11
12static inline struct inode *fsnotify_conn_inode(
13 struct fsnotify_mark_connector *conn)
14{
15 return container_of(conn->obj, struct inode, i_fsnotify_marks);
16}
17
18static inline struct mount *fsnotify_conn_mount(
19 struct fsnotify_mark_connector *conn)
20{
21 return container_of(conn->obj, struct mount, mnt_fsnotify_marks);
22}
23
24static inline struct super_block *fsnotify_conn_sb(
25 struct fsnotify_mark_connector *conn)
26{
27 return container_of(conn->obj, struct super_block, s_fsnotify_marks);
28}
29
30static inline struct super_block *fsnotify_connector_sb(
31 struct fsnotify_mark_connector *conn)
32{
33 switch (conn->type) {
34 case FSNOTIFY_OBJ_TYPE_INODE:
35 return fsnotify_conn_inode(conn)->i_sb;
36 case FSNOTIFY_OBJ_TYPE_VFSMOUNT:
37 return fsnotify_conn_mount(conn)->mnt.mnt_sb;
38 case FSNOTIFY_OBJ_TYPE_SB:
39 return fsnotify_conn_sb(conn);
40 default:
41 return NULL;
42 }
43}
44
45/* destroy all events sitting in this groups notification queue */
46extern void fsnotify_flush_notify(struct fsnotify_group *group);
47
48/* protects reads of inode and vfsmount marks list */
49extern struct srcu_struct fsnotify_mark_srcu;
50
51/* compare two groups for sorting of marks lists */
52extern int fsnotify_compare_groups(struct fsnotify_group *a,
53 struct fsnotify_group *b);
54
55/* Destroy all marks attached to an object via connector */
56extern void fsnotify_destroy_marks(fsnotify_connp_t *connp);
57/* run the list of all marks associated with inode and destroy them */
58static inline void fsnotify_clear_marks_by_inode(struct inode *inode)
59{
60 fsnotify_destroy_marks(connp: &inode->i_fsnotify_marks);
61}
62/* run the list of all marks associated with vfsmount and destroy them */
63static inline void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
64{
65 fsnotify_destroy_marks(connp: &real_mount(mnt)->mnt_fsnotify_marks);
66}
67/* run the list of all marks associated with sb and destroy them */
68static inline void fsnotify_clear_marks_by_sb(struct super_block *sb)
69{
70 fsnotify_destroy_marks(connp: &sb->s_fsnotify_marks);
71}
72
73/*
74 * update the dentry->d_flags of all of inode's children to indicate if inode cares
75 * about events that happen to its children.
76 */
77extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
78
79extern struct kmem_cache *fsnotify_mark_connector_cachep;
80
81#endif /* __FS_NOTIFY_FSNOTIFY_H_ */
82

source code of linux/fs/notify/fsnotify.h