1#ifndef __FS_NOTIFY_FSNOTIFY_H_
 2#define __FS_NOTIFY_FSNOTIFY_H_
 3
 4#include <linux/list.h>
 5#include <linux/fsnotify.h>
 6#include <linux/srcu.h>
 7#include <linux/types.h>
 8
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 9/* destroy all events sitting in this groups notification queue */
10extern void fsnotify_flush_notify(struct fsnotify_group *group);
11
12/* protects reads of inode and vfsmount marks list */
13extern struct srcu_struct fsnotify_mark_srcu;
14
15extern void fsnotify_set_inode_mark_mask_locked(struct fsnotify_mark *fsn_mark,
16						__u32 mask);
17/* add a mark to an inode */
18extern int fsnotify_add_inode_mark(struct fsnotify_mark *mark,
19				   struct fsnotify_group *group, struct inode *inode,
20				   int allow_dups);
21/* add a mark to a vfsmount */
22extern int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark,
23				      struct fsnotify_group *group, struct vfsmount *mnt,
24				      int allow_dups);
25
26/* final kfree of a group */
27extern void fsnotify_final_destroy_group(struct fsnotify_group *group);
28
29/* vfsmount specific destruction of a mark */
30extern void fsnotify_destroy_vfsmount_mark(struct fsnotify_mark *mark);
31/* inode specific destruction of a mark */
32extern void fsnotify_destroy_inode_mark(struct fsnotify_mark *mark);
33/* run the list of all marks associated with inode and flag them to be freed */
34extern void fsnotify_clear_marks_by_inode(struct inode *inode);
35/* run the list of all marks associated with vfsmount and flag them to be freed */
36extern void fsnotify_clear_marks_by_mount(struct vfsmount *mnt);
37/*
38 * update the dentry->d_flags of all of inode's children to indicate if inode cares
39 * about events that happen to its children.
40 */
41extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
42
43/* allocate and destroy and event holder to attach events to notification/access queues */
44extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
45extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
46
47#endif	/* __FS_NOTIFY_FSNOTIFY_H_ */

 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(&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(&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(&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_ */