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_ */

 
 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#include "../mount.h"
10
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
11/* destroy all events sitting in this groups notification queue */
12extern void fsnotify_flush_notify(struct fsnotify_group *group);
13
14/* protects reads of inode and vfsmount marks list */
15extern struct srcu_struct fsnotify_mark_srcu;
16
17/* Calculate mask of events for a list of marks */
18extern u32 fsnotify_recalc_mask(struct hlist_head *head);
19
20/* compare two groups for sorting of marks lists */
21extern int fsnotify_compare_groups(struct fsnotify_group *a,
22				   struct fsnotify_group *b);
23
24extern void fsnotify_set_inode_mark_mask_locked(struct fsnotify_mark *fsn_mark,
25						__u32 mask);
26/* Add mark to a proper place in mark list */
27extern int fsnotify_add_mark_list(struct hlist_head *head,
28				  struct fsnotify_mark *mark,
29				  int allow_dups);
30/* add a mark to an inode */
31extern int fsnotify_add_inode_mark(struct fsnotify_mark *mark,
32				   struct fsnotify_group *group, struct inode *inode,
33				   int allow_dups);
34/* add a mark to a vfsmount */
35extern int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark,
36				      struct fsnotify_group *group, struct vfsmount *mnt,
37				      int allow_dups);
38
39/* vfsmount specific destruction of a mark */
40extern void fsnotify_destroy_vfsmount_mark(struct fsnotify_mark *mark);
41/* inode specific destruction of a mark */
42extern void fsnotify_destroy_inode_mark(struct fsnotify_mark *mark);
43/* Find mark belonging to given group in the list of marks */
44extern struct fsnotify_mark *fsnotify_find_mark(struct hlist_head *head,
45						struct fsnotify_group *group);
46/* Destroy all marks in the given list protected by 'lock' */
47extern void fsnotify_destroy_marks(struct hlist_head *head, spinlock_t *lock);
48/* run the list of all marks associated with inode and destroy them */
49static inline void fsnotify_clear_marks_by_inode(struct inode *inode)
50{
51	fsnotify_destroy_marks(&inode->i_fsnotify_marks, &inode->i_lock);
52}
53/* run the list of all marks associated with vfsmount and destroy them */
54static inline void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
55{
56	fsnotify_destroy_marks(&real_mount(mnt)->mnt_fsnotify_marks,
57			       &mnt->mnt_root->d_lock);
 
 
 
 
58}
 
59/*
60 * update the dentry->d_flags of all of inode's children to indicate if inode cares
61 * about events that happen to its children.
62 */
63extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
64
65/* allocate and destroy and event holder to attach events to notification/access queues */
66extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
67extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
68
69#endif	/* __FS_NOTIFY_FSNOTIFY_H_ */