1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Filesystem access notification for Linux
5 * Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com>
8 #ifndef __LINUX_FSNOTIFY_BACKEND_H
9 #define __LINUX_FSNOTIFY_BACKEND_H
13 #include <linux/idr.h> /* inotify uses this */
14 #include <linux/fs.h> /* struct inode */
15 #include <linux/list.h>
16 #include <linux/path.h> /* struct path */
17 #include <linux/spinlock.h>
18 #include <linux/types.h>
19 #include <linux/atomic.h>
20 #include <linux/user_namespace.h>
21 #include <linux/refcount.h>
24 * IN_* from inotfy.h lines up EXACTLY with FS_*, this is so we can easily
25 * convert between them. dnotify only needs conversion at watch creation
26 * so no perf loss there. fanotify isn't defined yet, so it can use the
27 * wholes if it needs more events.
29 #define FS_ACCESS 0x00000001 /* File was accessed */
30 #define FS_MODIFY 0x00000002 /* File was modified */
31 #define FS_ATTRIB 0x00000004 /* Metadata changed */
32 #define FS_CLOSE_WRITE 0x00000008 /* Writtable file was closed */
33 #define FS_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */
34 #define FS_OPEN 0x00000020 /* File was opened */
35 #define FS_MOVED_FROM 0x00000040 /* File was moved from X */
36 #define FS_MOVED_TO 0x00000080 /* File was moved to Y */
37 #define FS_CREATE 0x00000100 /* Subfile was created */
38 #define FS_DELETE 0x00000200 /* Subfile was deleted */
39 #define FS_DELETE_SELF 0x00000400 /* Self was deleted */
40 #define FS_MOVE_SELF 0x00000800 /* Self was moved */
41 #define FS_OPEN_EXEC 0x00001000 /* File was opened for exec */
43 #define FS_UNMOUNT 0x00002000 /* inode on umount fs */
44 #define FS_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
45 #define FS_IN_IGNORED 0x00008000 /* last inotify event here */
47 #define FS_OPEN_PERM 0x00010000 /* open event in an permission hook */
48 #define FS_ACCESS_PERM 0x00020000 /* access event in a permissions hook */
49 #define FS_OPEN_EXEC_PERM 0x00040000 /* open/exec event in a permission hook */
51 #define FS_EXCL_UNLINK 0x04000000 /* do not send events if object is unlinked */
53 * Set on inode mark that cares about things that happen to its children.
54 * Always set for dnotify and inotify.
55 * Set on inode/sb/mount marks that care about parent/name info.
57 #define FS_EVENT_ON_CHILD 0x08000000
59 #define FS_DN_RENAME 0x10000000 /* file renamed */
60 #define FS_DN_MULTISHOT 0x20000000 /* dnotify multishot */
61 #define FS_ISDIR 0x40000000 /* event occurred against dir */
62 #define FS_IN_ONESHOT 0x80000000 /* only send event once */
64 #define FS_MOVE (FS_MOVED_FROM | FS_MOVED_TO)
67 * Directory entry modification events - reported only to directory
68 * where entry is modified and not to a watching parent.
69 * The watching parent may get an FS_ATTRIB|FS_EVENT_ON_CHILD event
70 * when a directory entry inside a child subdir changes.
72 #define ALL_FSNOTIFY_DIRENT_EVENTS (FS_CREATE | FS_DELETE | FS_MOVE)
74 #define ALL_FSNOTIFY_PERM_EVENTS (FS_OPEN_PERM | FS_ACCESS_PERM | \
78 * This is a list of all events that may get sent to a parent that is watching
79 * with flag FS_EVENT_ON_CHILD based on fs event on a child of that directory.
81 #define FS_EVENTS_POSS_ON_CHILD (ALL_FSNOTIFY_PERM_EVENTS | \
82 FS_ACCESS | FS_MODIFY | FS_ATTRIB | \
83 FS_CLOSE_WRITE | FS_CLOSE_NOWRITE | \
84 FS_OPEN | FS_OPEN_EXEC)
87 * This is a list of all events that may get sent with the parent inode as the
88 * @to_tell argument of fsnotify().
89 * It may include events that can be sent to an inode/sb/mount mark, but cannot
90 * be sent to a parent watching children.
92 #define FS_EVENTS_POSS_TO_PARENT (FS_EVENTS_POSS_ON_CHILD)
94 /* Events that can be reported to backends */
95 #define ALL_FSNOTIFY_EVENTS (ALL_FSNOTIFY_DIRENT_EVENTS | \
96 FS_EVENTS_POSS_ON_CHILD | \
97 FS_DELETE_SELF | FS_MOVE_SELF | FS_DN_RENAME | \
98 FS_UNMOUNT | FS_Q_OVERFLOW | FS_IN_IGNORED)
100 /* Extra flags that may be reported with event or control handling of events */
101 #define ALL_FSNOTIFY_FLAGS (FS_EXCL_UNLINK | FS_ISDIR | FS_IN_ONESHOT | \
102 FS_DN_MULTISHOT | FS_EVENT_ON_CHILD)
104 #define ALL_FSNOTIFY_BITS (ALL_FSNOTIFY_EVENTS | ALL_FSNOTIFY_FLAGS)
106 struct fsnotify_group
;
107 struct fsnotify_event
;
108 struct fsnotify_mark
;
109 struct fsnotify_event_private_data
;
110 struct fsnotify_fname
;
111 struct fsnotify_iter_info
;
116 * Each group much define these ops. The fsnotify infrastructure will call
117 * these operations for each relevant group.
119 * handle_event - main call for a group to handle an fs event
120 * @group: group to notify
121 * @mask: event type and flags
122 * @data: object that event happened on
123 * @data_type: type of object for fanotify_data_XXX() accessors
124 * @dir: optional directory associated with event -
125 * if @file_name is not NULL, this is the directory that
126 * @file_name is relative to
127 * @file_name: optional file name associated with event
128 * @cookie: inotify rename cookie
129 * @iter_info: array of marks from this group that are interested in the event
131 * handle_inode_event - simple variant of handle_event() for groups that only
132 * have inode marks and don't have ignore mask
133 * @mark: mark to notify
134 * @mask: event type and flags
135 * @inode: inode that event happened on
136 * @dir: optional directory associated with event -
137 * if @file_name is not NULL, this is the directory that
138 * @file_name is relative to.
139 * @file_name: optional file name associated with event
140 * @cookie: inotify rename cookie
142 * free_group_priv - called when a group refcnt hits 0 to clean up the private union
143 * freeing_mark - called when a mark is being destroyed for some reason. The group
144 * MUST be holding a reference on each mark and that reference must be
145 * dropped in this function. inotify uses this function to send
146 * userspace messages that marks have been removed.
148 struct fsnotify_ops
{
149 int (*handle_event
)(struct fsnotify_group
*group
, u32 mask
,
150 const void *data
, int data_type
, struct inode
*dir
,
151 const struct qstr
*file_name
, u32 cookie
,
152 struct fsnotify_iter_info
*iter_info
);
153 int (*handle_inode_event
)(struct fsnotify_mark
*mark
, u32 mask
,
154 struct inode
*inode
, struct inode
*dir
,
155 const struct qstr
*file_name
, u32 cookie
);
156 void (*free_group_priv
)(struct fsnotify_group
*group
);
157 void (*freeing_mark
)(struct fsnotify_mark
*mark
, struct fsnotify_group
*group
);
158 void (*free_event
)(struct fsnotify_event
*event
);
159 /* called on final put+free to free memory */
160 void (*free_mark
)(struct fsnotify_mark
*mark
);
164 * all of the information about the original object we want to now send to
165 * a group. If you want to carry more info from the accessing task to the
166 * listener this structure is where you need to be adding fields.
168 struct fsnotify_event
{
169 struct list_head list
;
173 * A group is a "thing" that wants to receive notification about filesystem
174 * events. The mask holds the subset of event types this group cares about.
175 * refcnt on a group is up to the implementor and at any moment if it goes 0
176 * everything will be cleaned up.
178 struct fsnotify_group
{
179 const struct fsnotify_ops
*ops
; /* how this group handles things */
182 * How the refcnt is used is up to each group. When the refcnt hits 0
183 * fsnotify will clean up all of the resources associated with this group.
184 * As an example, the dnotify group will always have a refcnt=1 and that
185 * will never change. Inotify, on the other hand, has a group per
186 * inotify_init() and the refcnt will hit 0 only when that fd has been
189 refcount_t refcnt
; /* things with interest in this group */
191 /* needed to send notification to userspace */
192 spinlock_t notification_lock
; /* protect the notification_list */
193 struct list_head notification_list
; /* list of event_holder this group needs to send to userspace */
194 wait_queue_head_t notification_waitq
; /* read() on the notification file blocks on this waitq */
195 unsigned int q_len
; /* events on the queue */
196 unsigned int max_events
; /* maximum events allowed on the list */
198 * Valid fsnotify group priorities. Events are send in order from highest
199 * priority to lowest priority. We default to the lowest priority.
201 #define FS_PRIO_0 0 /* normal notifiers, no permissions */
202 #define FS_PRIO_1 1 /* fanotify content based access control */
203 #define FS_PRIO_2 2 /* fanotify pre-content access */
204 unsigned int priority
;
205 bool shutdown
; /* group is being shut down, don't queue more events */
207 /* stores all fastpath marks assoc with this group so they can be cleaned on unregister */
208 struct mutex mark_mutex
; /* protect marks_list */
209 atomic_t user_waits
; /* Number of tasks waiting for user
211 struct list_head marks_list
; /* all inode marks for this group */
213 struct fasync_struct
*fsn_fa
; /* async notification */
215 struct fsnotify_event
*overflow_event
; /* Event we queue when the
216 * notification list is too
219 struct mem_cgroup
*memcg
; /* memcg to charge allocations */
221 /* groups can define private fields here or use the void *private */
224 #ifdef CONFIG_INOTIFY_USER
225 struct inotify_group_private_data
{
228 struct ucounts
*ucounts
;
231 #ifdef CONFIG_FANOTIFY
232 struct fanotify_group_private_data
{
233 /* Hash table of events for merge */
234 struct hlist_head
*merge_hash
;
235 /* allows a group to block waiting for a userspace response */
236 struct list_head access_list
;
237 wait_queue_head_t access_waitq
;
238 int flags
; /* flags from fanotify_init() */
239 int f_flags
; /* event_f_flags from fanotify_init() */
240 struct ucounts
*ucounts
;
242 #endif /* CONFIG_FANOTIFY */
246 /* When calling fsnotify tell it if the data is a path or inode */
247 enum fsnotify_data_type
{
250 FSNOTIFY_EVENT_INODE
,
253 static inline struct inode
*fsnotify_data_inode(const void *data
, int data_type
)
256 case FSNOTIFY_EVENT_INODE
:
257 return (struct inode
*)data
;
258 case FSNOTIFY_EVENT_PATH
:
259 return d_inode(((const struct path
*)data
)->dentry
);
265 static inline const struct path
*fsnotify_data_path(const void *data
,
269 case FSNOTIFY_EVENT_PATH
:
276 enum fsnotify_obj_type
{
277 FSNOTIFY_OBJ_TYPE_INODE
,
278 FSNOTIFY_OBJ_TYPE_PARENT
,
279 FSNOTIFY_OBJ_TYPE_VFSMOUNT
,
280 FSNOTIFY_OBJ_TYPE_SB
,
281 FSNOTIFY_OBJ_TYPE_COUNT
,
282 FSNOTIFY_OBJ_TYPE_DETACHED
= FSNOTIFY_OBJ_TYPE_COUNT
285 #define FSNOTIFY_OBJ_TYPE_INODE_FL (1U << FSNOTIFY_OBJ_TYPE_INODE)
286 #define FSNOTIFY_OBJ_TYPE_PARENT_FL (1U << FSNOTIFY_OBJ_TYPE_PARENT)
287 #define FSNOTIFY_OBJ_TYPE_VFSMOUNT_FL (1U << FSNOTIFY_OBJ_TYPE_VFSMOUNT)
288 #define FSNOTIFY_OBJ_TYPE_SB_FL (1U << FSNOTIFY_OBJ_TYPE_SB)
289 #define FSNOTIFY_OBJ_ALL_TYPES_MASK ((1U << FSNOTIFY_OBJ_TYPE_COUNT) - 1)
291 static inline bool fsnotify_valid_obj_type(unsigned int type
)
293 return (type
< FSNOTIFY_OBJ_TYPE_COUNT
);
296 struct fsnotify_iter_info
{
297 struct fsnotify_mark
*marks
[FSNOTIFY_OBJ_TYPE_COUNT
];
298 unsigned int report_mask
;
302 static inline bool fsnotify_iter_should_report_type(
303 struct fsnotify_iter_info
*iter_info
, int type
)
305 return (iter_info
->report_mask
& (1U << type
));
308 static inline void fsnotify_iter_set_report_type(
309 struct fsnotify_iter_info
*iter_info
, int type
)
311 iter_info
->report_mask
|= (1U << type
);
314 static inline void fsnotify_iter_set_report_type_mark(
315 struct fsnotify_iter_info
*iter_info
, int type
,
316 struct fsnotify_mark
*mark
)
318 iter_info
->marks
[type
] = mark
;
319 iter_info
->report_mask
|= (1U << type
);
322 #define FSNOTIFY_ITER_FUNCS(name, NAME) \
323 static inline struct fsnotify_mark *fsnotify_iter_##name##_mark( \
324 struct fsnotify_iter_info *iter_info) \
326 return (iter_info->report_mask & FSNOTIFY_OBJ_TYPE_##NAME##_FL) ? \
327 iter_info->marks[FSNOTIFY_OBJ_TYPE_##NAME] : NULL; \
330 FSNOTIFY_ITER_FUNCS(inode
, INODE
)
331 FSNOTIFY_ITER_FUNCS(parent
, PARENT
)
332 FSNOTIFY_ITER_FUNCS(vfsmount
, VFSMOUNT
)
333 FSNOTIFY_ITER_FUNCS(sb
, SB
)
335 #define fsnotify_foreach_obj_type(type) \
336 for (type = 0; type < FSNOTIFY_OBJ_TYPE_COUNT; type++)
339 * fsnotify_connp_t is what we embed in objects which connector can be attached
340 * to. fsnotify_connp_t * is how we refer from connector back to object.
342 struct fsnotify_mark_connector
;
343 typedef struct fsnotify_mark_connector __rcu
*fsnotify_connp_t
;
346 * Inode/vfsmount/sb point to this structure which tracks all marks attached to
347 * the inode/vfsmount/sb. The reference to inode/vfsmount/sb is held by this
348 * structure. We destroy this structure when there are no more marks attached
349 * to it. The structure is protected by fsnotify_mark_srcu.
351 struct fsnotify_mark_connector
{
353 unsigned short type
; /* Type of object [lock] */
354 #define FSNOTIFY_CONN_FLAG_HAS_FSID 0x01
355 unsigned short flags
; /* flags [lock] */
356 __kernel_fsid_t fsid
; /* fsid of filesystem containing object */
358 /* Object pointer [lock] */
359 fsnotify_connp_t
*obj
;
360 /* Used listing heads to free after srcu period expires */
361 struct fsnotify_mark_connector
*destroy_next
;
363 struct hlist_head list
;
367 * A mark is simply an object attached to an in core inode which allows an
368 * fsnotify listener to indicate they are either no longer interested in events
369 * of a type matching mask or only interested in those events.
371 * These are flushed when an inode is evicted from core and may be flushed
372 * when the inode is modified (as seen by fsnotify_access). Some fsnotify
373 * users (such as dnotify) will flush these when the open fd is closed and not
374 * at inode eviction or modification.
376 * Text in brackets is showing the lock(s) protecting modifications of a
377 * particular entry. obj_lock means either inode->i_lock or
378 * mnt->mnt_root->d_lock depending on the mark type.
380 struct fsnotify_mark
{
381 /* Mask this mark is for [mark->lock, group->mark_mutex] */
383 /* We hold one for presence in g_list. Also one ref for each 'thing'
384 * in kernel that found and may be using this mark. */
386 /* Group this mark is for. Set on mark creation, stable until last ref
388 struct fsnotify_group
*group
;
389 /* List of marks by group->marks_list. Also reused for queueing
390 * mark into destroy_list when it's waiting for the end of SRCU period
391 * before it can be freed. [group->mark_mutex] */
392 struct list_head g_list
;
393 /* Protects inode / mnt pointers, flags, masks */
395 /* List of marks for inode / vfsmount [connector->lock, mark ref] */
396 struct hlist_node obj_list
;
397 /* Head of list of marks for an object [mark ref] */
398 struct fsnotify_mark_connector
*connector
;
399 /* Events types to ignore [mark->lock, group->mark_mutex] */
401 #define FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY 0x01
402 #define FSNOTIFY_MARK_FLAG_ALIVE 0x02
403 #define FSNOTIFY_MARK_FLAG_ATTACHED 0x04
404 unsigned int flags
; /* flags [mark->lock] */
407 #ifdef CONFIG_FSNOTIFY
409 /* called from the vfs helpers */
411 /* main fsnotify call to send events */
412 extern int fsnotify(__u32 mask
, const void *data
, int data_type
,
413 struct inode
*dir
, const struct qstr
*name
,
414 struct inode
*inode
, u32 cookie
);
415 extern int __fsnotify_parent(struct dentry
*dentry
, __u32 mask
, const void *data
,
417 extern void __fsnotify_inode_delete(struct inode
*inode
);
418 extern void __fsnotify_vfsmount_delete(struct vfsmount
*mnt
);
419 extern void fsnotify_sb_delete(struct super_block
*sb
);
420 extern u32
fsnotify_get_cookie(void);
422 static inline __u32
fsnotify_parent_needed_mask(__u32 mask
)
424 /* FS_EVENT_ON_CHILD is set on marks that want parent/name info */
425 if (!(mask
& FS_EVENT_ON_CHILD
))
428 * This object might be watched by a mark that cares about parent/name
429 * info, does it care about the specific set of events that can be
430 * reported with parent/name info?
432 return mask
& FS_EVENTS_POSS_TO_PARENT
;
435 static inline int fsnotify_inode_watches_children(struct inode
*inode
)
437 /* FS_EVENT_ON_CHILD is set if the inode may care */
438 if (!(inode
->i_fsnotify_mask
& FS_EVENT_ON_CHILD
))
440 /* this inode might care about child events, does it care about the
441 * specific set of events that can happen on a child? */
442 return inode
->i_fsnotify_mask
& FS_EVENTS_POSS_ON_CHILD
;
446 * Update the dentry with a flag indicating the interest of its parent to receive
447 * filesystem events when those events happens to this dentry->d_inode.
449 static inline void fsnotify_update_flags(struct dentry
*dentry
)
451 assert_spin_locked(&dentry
->d_lock
);
454 * Serialisation of setting PARENT_WATCHED on the dentries is provided
455 * by d_lock. If inotify_inode_watched changes after we have taken
456 * d_lock, the following __fsnotify_update_child_dentry_flags call will
457 * find our entry, so it will spin until we complete here, and update
458 * us with the new state.
460 if (fsnotify_inode_watches_children(dentry
->d_parent
->d_inode
))
461 dentry
->d_flags
|= DCACHE_FSNOTIFY_PARENT_WATCHED
;
463 dentry
->d_flags
&= ~DCACHE_FSNOTIFY_PARENT_WATCHED
;
466 /* called from fsnotify listeners, such as fanotify or dnotify */
468 /* create a new group */
469 extern struct fsnotify_group
*fsnotify_alloc_group(const struct fsnotify_ops
*ops
);
470 extern struct fsnotify_group
*fsnotify_alloc_user_group(const struct fsnotify_ops
*ops
);
471 /* get reference to a group */
472 extern void fsnotify_get_group(struct fsnotify_group
*group
);
473 /* drop reference on a group from fsnotify_alloc_group */
474 extern void fsnotify_put_group(struct fsnotify_group
*group
);
475 /* group destruction begins, stop queuing new events */
476 extern void fsnotify_group_stop_queueing(struct fsnotify_group
*group
);
478 extern void fsnotify_destroy_group(struct fsnotify_group
*group
);
479 /* fasync handler function */
480 extern int fsnotify_fasync(int fd
, struct file
*file
, int on
);
481 /* Free event from memory */
482 extern void fsnotify_destroy_event(struct fsnotify_group
*group
,
483 struct fsnotify_event
*event
);
484 /* attach the event to the group notification queue */
485 extern int fsnotify_add_event(struct fsnotify_group
*group
,
486 struct fsnotify_event
*event
,
487 int (*merge
)(struct fsnotify_group
*,
488 struct fsnotify_event
*),
489 void (*insert
)(struct fsnotify_group
*,
490 struct fsnotify_event
*));
491 /* Queue overflow event to a notification group */
492 static inline void fsnotify_queue_overflow(struct fsnotify_group
*group
)
494 fsnotify_add_event(group
, group
->overflow_event
, NULL
, NULL
);
497 static inline bool fsnotify_notify_queue_is_empty(struct fsnotify_group
*group
)
499 assert_spin_locked(&group
->notification_lock
);
501 return list_empty(&group
->notification_list
);
504 extern bool fsnotify_notify_queue_is_empty(struct fsnotify_group
*group
);
505 /* return, but do not dequeue the first event on the notification queue */
506 extern struct fsnotify_event
*fsnotify_peek_first_event(struct fsnotify_group
*group
);
507 /* return AND dequeue the first event on the notification queue */
508 extern struct fsnotify_event
*fsnotify_remove_first_event(struct fsnotify_group
*group
);
509 /* Remove event queued in the notification list */
510 extern void fsnotify_remove_queued_event(struct fsnotify_group
*group
,
511 struct fsnotify_event
*event
);
513 /* functions used to manipulate the marks attached to inodes */
515 /* Get mask of events for a list of marks */
516 extern __u32
fsnotify_conn_mask(struct fsnotify_mark_connector
*conn
);
517 /* Calculate mask of events for a list of marks */
518 extern void fsnotify_recalc_mask(struct fsnotify_mark_connector
*conn
);
519 extern void fsnotify_init_mark(struct fsnotify_mark
*mark
,
520 struct fsnotify_group
*group
);
521 /* Find mark belonging to given group in the list of marks */
522 extern struct fsnotify_mark
*fsnotify_find_mark(fsnotify_connp_t
*connp
,
523 struct fsnotify_group
*group
);
524 /* Get cached fsid of filesystem containing object */
525 extern int fsnotify_get_conn_fsid(const struct fsnotify_mark_connector
*conn
,
526 __kernel_fsid_t
*fsid
);
527 /* attach the mark to the object */
528 extern int fsnotify_add_mark(struct fsnotify_mark
*mark
,
529 fsnotify_connp_t
*connp
, unsigned int type
,
530 int allow_dups
, __kernel_fsid_t
*fsid
);
531 extern int fsnotify_add_mark_locked(struct fsnotify_mark
*mark
,
532 fsnotify_connp_t
*connp
,
533 unsigned int type
, int allow_dups
,
534 __kernel_fsid_t
*fsid
);
536 /* attach the mark to the inode */
537 static inline int fsnotify_add_inode_mark(struct fsnotify_mark
*mark
,
541 return fsnotify_add_mark(mark
, &inode
->i_fsnotify_marks
,
542 FSNOTIFY_OBJ_TYPE_INODE
, allow_dups
, NULL
);
544 static inline int fsnotify_add_inode_mark_locked(struct fsnotify_mark
*mark
,
548 return fsnotify_add_mark_locked(mark
, &inode
->i_fsnotify_marks
,
549 FSNOTIFY_OBJ_TYPE_INODE
, allow_dups
,
553 /* given a group and a mark, flag mark to be freed when all references are dropped */
554 extern void fsnotify_destroy_mark(struct fsnotify_mark
*mark
,
555 struct fsnotify_group
*group
);
556 /* detach mark from inode / mount list, group list, drop inode reference */
557 extern void fsnotify_detach_mark(struct fsnotify_mark
*mark
);
559 extern void fsnotify_free_mark(struct fsnotify_mark
*mark
);
560 /* Wait until all marks queued for destruction are destroyed */
561 extern void fsnotify_wait_marks_destroyed(void);
562 /* run all the marks in a group, and clear all of the marks attached to given object type */
563 extern void fsnotify_clear_marks_by_group(struct fsnotify_group
*group
, unsigned int type
);
564 /* run all the marks in a group, and clear all of the vfsmount marks */
565 static inline void fsnotify_clear_vfsmount_marks_by_group(struct fsnotify_group
*group
)
567 fsnotify_clear_marks_by_group(group
, FSNOTIFY_OBJ_TYPE_VFSMOUNT_FL
);
569 /* run all the marks in a group, and clear all of the inode marks */
570 static inline void fsnotify_clear_inode_marks_by_group(struct fsnotify_group
*group
)
572 fsnotify_clear_marks_by_group(group
, FSNOTIFY_OBJ_TYPE_INODE_FL
);
574 /* run all the marks in a group, and clear all of the sn marks */
575 static inline void fsnotify_clear_sb_marks_by_group(struct fsnotify_group
*group
)
577 fsnotify_clear_marks_by_group(group
, FSNOTIFY_OBJ_TYPE_SB_FL
);
579 extern void fsnotify_get_mark(struct fsnotify_mark
*mark
);
580 extern void fsnotify_put_mark(struct fsnotify_mark
*mark
);
581 extern void fsnotify_finish_user_wait(struct fsnotify_iter_info
*iter_info
);
582 extern bool fsnotify_prepare_user_wait(struct fsnotify_iter_info
*iter_info
);
584 static inline void fsnotify_init_event(struct fsnotify_event
*event
)
586 INIT_LIST_HEAD(&event
->list
);
591 static inline int fsnotify(__u32 mask
, const void *data
, int data_type
,
592 struct inode
*dir
, const struct qstr
*name
,
593 struct inode
*inode
, u32 cookie
)
598 static inline int __fsnotify_parent(struct dentry
*dentry
, __u32 mask
,
599 const void *data
, int data_type
)
604 static inline void __fsnotify_inode_delete(struct inode
*inode
)
607 static inline void __fsnotify_vfsmount_delete(struct vfsmount
*mnt
)
610 static inline void fsnotify_sb_delete(struct super_block
*sb
)
613 static inline void fsnotify_update_flags(struct dentry
*dentry
)
616 static inline u32
fsnotify_get_cookie(void)
621 static inline void fsnotify_unmount_inodes(struct super_block
*sb
)
624 #endif /* CONFIG_FSNOTIFY */
626 #endif /* __KERNEL __ */
628 #endif /* __LINUX_FSNOTIFY_BACKEND_H */