Commit | Line | Data |
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90586523 EP |
1 | /* |
2 | * Filesystem access notification for Linux | |
3 | * | |
4 | * Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com> | |
5 | */ | |
6 | ||
7 | #ifndef __LINUX_FSNOTIFY_BACKEND_H | |
8 | #define __LINUX_FSNOTIFY_BACKEND_H | |
9 | ||
10 | #ifdef __KERNEL__ | |
11 | ||
63c882a0 | 12 | #include <linux/idr.h> /* inotify uses this */ |
90586523 EP |
13 | #include <linux/fs.h> /* struct inode */ |
14 | #include <linux/list.h> | |
15 | #include <linux/path.h> /* struct path */ | |
16 | #include <linux/spinlock.h> | |
17 | #include <linux/types.h> | |
60063497 | 18 | #include <linux/atomic.h> |
1cce1eea | 19 | #include <linux/user_namespace.h> |
90586523 EP |
20 | |
21 | /* | |
22 | * IN_* from inotfy.h lines up EXACTLY with FS_*, this is so we can easily | |
23 | * convert between them. dnotify only needs conversion at watch creation | |
24 | * so no perf loss there. fanotify isn't defined yet, so it can use the | |
25 | * wholes if it needs more events. | |
26 | */ | |
27 | #define FS_ACCESS 0x00000001 /* File was accessed */ | |
28 | #define FS_MODIFY 0x00000002 /* File was modified */ | |
29 | #define FS_ATTRIB 0x00000004 /* Metadata changed */ | |
30 | #define FS_CLOSE_WRITE 0x00000008 /* Writtable file was closed */ | |
31 | #define FS_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */ | |
32 | #define FS_OPEN 0x00000020 /* File was opened */ | |
33 | #define FS_MOVED_FROM 0x00000040 /* File was moved from X */ | |
34 | #define FS_MOVED_TO 0x00000080 /* File was moved to Y */ | |
35 | #define FS_CREATE 0x00000100 /* Subfile was created */ | |
36 | #define FS_DELETE 0x00000200 /* Subfile was deleted */ | |
37 | #define FS_DELETE_SELF 0x00000400 /* Self was deleted */ | |
38 | #define FS_MOVE_SELF 0x00000800 /* Self was moved */ | |
39 | ||
40 | #define FS_UNMOUNT 0x00002000 /* inode on umount fs */ | |
41 | #define FS_Q_OVERFLOW 0x00004000 /* Event queued overflowed */ | |
42 | #define FS_IN_IGNORED 0x00008000 /* last inotify event here */ | |
43 | ||
c4ec54b4 EP |
44 | #define FS_OPEN_PERM 0x00010000 /* open event in an permission hook */ |
45 | #define FS_ACCESS_PERM 0x00020000 /* access event in a permissions hook */ | |
46 | ||
8c1934c8 | 47 | #define FS_EXCL_UNLINK 0x04000000 /* do not send events if object is unlinked */ |
b29866aa | 48 | #define FS_ISDIR 0x40000000 /* event occurred against dir */ |
90586523 EP |
49 | #define FS_IN_ONESHOT 0x80000000 /* only send event once */ |
50 | ||
51 | #define FS_DN_RENAME 0x10000000 /* file renamed */ | |
52 | #define FS_DN_MULTISHOT 0x20000000 /* dnotify multishot */ | |
53 | ||
c28f7e56 EP |
54 | /* This inode cares about things that happen to its children. Always set for |
55 | * dnotify and inotify. */ | |
56 | #define FS_EVENT_ON_CHILD 0x08000000 | |
57 | ||
58 | /* This is a list of all events that may get sent to a parernt based on fs event | |
59 | * happening to inodes inside that directory */ | |
60 | #define FS_EVENTS_POSS_ON_CHILD (FS_ACCESS | FS_MODIFY | FS_ATTRIB |\ | |
61 | FS_CLOSE_WRITE | FS_CLOSE_NOWRITE | FS_OPEN |\ | |
62 | FS_MOVED_FROM | FS_MOVED_TO | FS_CREATE |\ | |
a4f9a9a6 | 63 | FS_DELETE | FS_OPEN_PERM | FS_ACCESS_PERM) |
c28f7e56 | 64 | |
e9fd702a EP |
65 | #define FS_MOVE (FS_MOVED_FROM | FS_MOVED_TO) |
66 | ||
ff8bcbd0 EP |
67 | #define ALL_FSNOTIFY_PERM_EVENTS (FS_OPEN_PERM | FS_ACCESS_PERM) |
68 | ||
20dee624 EP |
69 | #define ALL_FSNOTIFY_EVENTS (FS_ACCESS | FS_MODIFY | FS_ATTRIB | \ |
70 | FS_CLOSE_WRITE | FS_CLOSE_NOWRITE | FS_OPEN | \ | |
71 | FS_MOVED_FROM | FS_MOVED_TO | FS_CREATE | \ | |
72 | FS_DELETE | FS_DELETE_SELF | FS_MOVE_SELF | \ | |
73 | FS_UNMOUNT | FS_Q_OVERFLOW | FS_IN_IGNORED | \ | |
74 | FS_OPEN_PERM | FS_ACCESS_PERM | FS_EXCL_UNLINK | \ | |
b29866aa | 75 | FS_ISDIR | FS_IN_ONESHOT | FS_DN_RENAME | \ |
20dee624 EP |
76 | FS_DN_MULTISHOT | FS_EVENT_ON_CHILD) |
77 | ||
90586523 EP |
78 | struct fsnotify_group; |
79 | struct fsnotify_event; | |
e61ce867 | 80 | struct fsnotify_mark; |
e4aff117 | 81 | struct fsnotify_event_private_data; |
7053aee2 | 82 | struct fsnotify_fname; |
90586523 EP |
83 | |
84 | /* | |
85 | * Each group much define these ops. The fsnotify infrastructure will call | |
86 | * these operations for each relevant group. | |
87 | * | |
88 | * handle_event - main call for a group to handle an fs event | |
89 | * free_group_priv - called when a group refcnt hits 0 to clean up the private union | |
6960b0d9 LS |
90 | * freeing_mark - called when a mark is being destroyed for some reason. The group |
91 | * MUST be holding a reference on each mark and that reference must be | |
92 | * dropped in this function. inotify uses this function to send | |
93 | * userspace messages that marks have been removed. | |
90586523 EP |
94 | */ |
95 | struct fsnotify_ops { | |
ce8f76fb | 96 | int (*handle_event)(struct fsnotify_group *group, |
7053aee2 | 97 | struct inode *inode, |
ce8f76fb EP |
98 | struct fsnotify_mark *inode_mark, |
99 | struct fsnotify_mark *vfsmount_mark, | |
3cd5eca8 | 100 | u32 mask, const void *data, int data_type, |
45a22f4c | 101 | const unsigned char *file_name, u32 cookie); |
90586523 | 102 | void (*free_group_priv)(struct fsnotify_group *group); |
841bdc10 | 103 | void (*freeing_mark)(struct fsnotify_mark *mark, struct fsnotify_group *group); |
7053aee2 JK |
104 | void (*free_event)(struct fsnotify_event *event); |
105 | }; | |
106 | ||
107 | /* | |
108 | * all of the information about the original object we want to now send to | |
109 | * a group. If you want to carry more info from the accessing task to the | |
110 | * listener this structure is where you need to be adding fields. | |
111 | */ | |
112 | struct fsnotify_event { | |
113 | struct list_head list; | |
114 | /* inode may ONLY be dereferenced during handle_event(). */ | |
115 | struct inode *inode; /* either the inode the event happened to or its parent */ | |
116 | u32 mask; /* the type of access, bitwise OR for FS_* event types */ | |
90586523 EP |
117 | }; |
118 | ||
119 | /* | |
120 | * A group is a "thing" that wants to receive notification about filesystem | |
121 | * events. The mask holds the subset of event types this group cares about. | |
122 | * refcnt on a group is up to the implementor and at any moment if it goes 0 | |
123 | * everything will be cleaned up. | |
124 | */ | |
125 | struct fsnotify_group { | |
90586523 EP |
126 | /* |
127 | * How the refcnt is used is up to each group. When the refcnt hits 0 | |
128 | * fsnotify will clean up all of the resources associated with this group. | |
129 | * As an example, the dnotify group will always have a refcnt=1 and that | |
130 | * will never change. Inotify, on the other hand, has a group per | |
131 | * inotify_init() and the refcnt will hit 0 only when that fd has been | |
132 | * closed. | |
133 | */ | |
134 | atomic_t refcnt; /* things with interest in this group */ | |
90586523 EP |
135 | |
136 | const struct fsnotify_ops *ops; /* how this group handles things */ | |
137 | ||
a2d8bc6c | 138 | /* needed to send notification to userspace */ |
c21dbe20 | 139 | spinlock_t notification_lock; /* protect the notification_list */ |
a2d8bc6c EP |
140 | struct list_head notification_list; /* list of event_holder this group needs to send to userspace */ |
141 | wait_queue_head_t notification_waitq; /* read() on the notification file blocks on this waitq */ | |
142 | unsigned int q_len; /* events on the queue */ | |
143 | unsigned int max_events; /* maximum events allowed on the list */ | |
6ad2d4e3 EP |
144 | /* |
145 | * Valid fsnotify group priorities. Events are send in order from highest | |
146 | * priority to lowest priority. We default to the lowest priority. | |
147 | */ | |
148 | #define FS_PRIO_0 0 /* normal notifiers, no permissions */ | |
149 | #define FS_PRIO_1 1 /* fanotify content based access control */ | |
150 | #define FS_PRIO_2 2 /* fanotify pre-content access */ | |
151 | unsigned int priority; | |
12703dbf | 152 | bool shutdown; /* group is being shut down, don't queue more events */ |
a2d8bc6c | 153 | |
e61ce867 | 154 | /* stores all fastpath marks assoc with this group so they can be cleaned on unregister */ |
986ab098 | 155 | struct mutex mark_mutex; /* protect marks_list */ |
841bdc10 | 156 | atomic_t num_marks; /* 1 for each mark and 1 for not being |
3be25f49 EP |
157 | * past the point of no return when freeing |
158 | * a group */ | |
e61ce867 | 159 | struct list_head marks_list; /* all inode marks for this group */ |
3be25f49 | 160 | |
7053aee2 JK |
161 | struct fasync_struct *fsn_fa; /* async notification */ |
162 | ||
ff57cd58 | 163 | struct fsnotify_event *overflow_event; /* Event we queue when the |
7053aee2 JK |
164 | * notification list is too |
165 | * full */ | |
0a6b6bd5 | 166 | |
90586523 EP |
167 | /* groups can define private fields here or use the void *private */ |
168 | union { | |
169 | void *private; | |
63c882a0 EP |
170 | #ifdef CONFIG_INOTIFY_USER |
171 | struct inotify_group_private_data { | |
172 | spinlock_t idr_lock; | |
173 | struct idr idr; | |
1cce1eea | 174 | struct ucounts *ucounts; |
63c882a0 | 175 | } inotify_data; |
9e66e423 | 176 | #endif |
80af2588 | 177 | #ifdef CONFIG_FANOTIFY |
9e66e423 | 178 | struct fanotify_group_private_data { |
80af2588 | 179 | #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS |
9e66e423 | 180 | /* allows a group to block waiting for a userspace response */ |
9e66e423 EP |
181 | struct list_head access_list; |
182 | wait_queue_head_t access_waitq; | |
80af2588 EP |
183 | #endif /* CONFIG_FANOTIFY_ACCESS_PERMISSIONS */ |
184 | int f_flags; | |
e7099d8a | 185 | unsigned int max_marks; |
4afeff85 | 186 | struct user_struct *user; |
9e66e423 | 187 | } fanotify_data; |
80af2588 | 188 | #endif /* CONFIG_FANOTIFY */ |
90586523 EP |
189 | }; |
190 | }; | |
191 | ||
90586523 EP |
192 | /* when calling fsnotify tell it if the data is a path or inode */ |
193 | #define FSNOTIFY_EVENT_NONE 0 | |
2069601b | 194 | #define FSNOTIFY_EVENT_PATH 1 |
90586523 | 195 | #define FSNOTIFY_EVENT_INODE 2 |
90586523 | 196 | |
9dd813c1 JK |
197 | /* |
198 | * Inode / vfsmount point to this structure which tracks all marks attached to | |
e911d8af JK |
199 | * the inode / vfsmount. The reference to inode / vfsmount is held by this |
200 | * structure whenever the list is non-empty. The structure is freed only when | |
201 | * inode / vfsmount gets freed. | |
9dd813c1 JK |
202 | */ |
203 | struct fsnotify_mark_connector { | |
86ffe245 JK |
204 | #define FSNOTIFY_OBJ_TYPE_INODE 0x01 |
205 | #define FSNOTIFY_OBJ_TYPE_VFSMOUNT 0x02 | |
206 | unsigned int flags; /* Type of object [lock] */ | |
207 | union { /* Object pointer [lock] */ | |
208 | struct inode *inode; | |
209 | struct vfsmount *mnt; | |
210 | }; | |
9dd813c1 JK |
211 | struct hlist_head list; |
212 | }; | |
213 | ||
3be25f49 | 214 | /* |
1e39fc01 | 215 | * A mark is simply an object attached to an in core inode which allows an |
3be25f49 EP |
216 | * fsnotify listener to indicate they are either no longer interested in events |
217 | * of a type matching mask or only interested in those events. | |
218 | * | |
1e39fc01 JK |
219 | * These are flushed when an inode is evicted from core and may be flushed |
220 | * when the inode is modified (as seen by fsnotify_access). Some fsnotify | |
221 | * users (such as dnotify) will flush these when the open fd is closed and not | |
222 | * at inode eviction or modification. | |
223 | * | |
224 | * Text in brackets is showing the lock(s) protecting modifications of a | |
225 | * particular entry. obj_lock means either inode->i_lock or | |
226 | * mnt->mnt_root->d_lock depending on the mark type. | |
3be25f49 | 227 | */ |
e61ce867 | 228 | struct fsnotify_mark { |
1e39fc01 JK |
229 | /* Mask this mark is for [mark->lock, group->mark_mutex] */ |
230 | __u32 mask; | |
231 | /* We hold one for presence in g_list. Also one ref for each 'thing' | |
3be25f49 | 232 | * in kernel that found and may be using this mark. */ |
1e39fc01 JK |
233 | atomic_t refcnt; |
234 | /* Group this mark is for. Set on mark creation, stable until last ref | |
235 | * is dropped */ | |
236 | struct fsnotify_group *group; | |
237 | /* List of marks by group->i_fsnotify_marks. Also reused for queueing | |
238 | * mark into destroy_list when it's waiting for the end of SRCU period | |
239 | * before it can be freed. [group->mark_mutex] */ | |
13d34ac6 | 240 | struct list_head g_list; |
1e39fc01 JK |
241 | /* Protects inode / mnt pointers, flags, masks */ |
242 | spinlock_t lock; | |
243 | /* List of marks for inode / vfsmount [obj_lock] */ | |
244 | struct hlist_node obj_list; | |
86ffe245 JK |
245 | /* Head of list of marks for an object [mark->lock, group->mark_mutex] */ |
246 | struct fsnotify_mark_connector *connector; | |
1e39fc01 JK |
247 | /* Events types to ignore [mark->lock, group->mark_mutex] */ |
248 | __u32 ignored_mask; | |
e911d8af JK |
249 | #define FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY 0x01 |
250 | #define FSNOTIFY_MARK_FLAG_ALIVE 0x02 | |
251 | #define FSNOTIFY_MARK_FLAG_ATTACHED 0x04 | |
1e39fc01 | 252 | unsigned int flags; /* flags [mark->lock] */ |
841bdc10 | 253 | void (*free_mark)(struct fsnotify_mark *mark); /* called on final put+free */ |
3be25f49 EP |
254 | }; |
255 | ||
90586523 EP |
256 | #ifdef CONFIG_FSNOTIFY |
257 | ||
258 | /* called from the vfs helpers */ | |
259 | ||
260 | /* main fsnotify call to send events */ | |
e637835e | 261 | extern int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is, |
c4ec54b4 | 262 | const unsigned char *name, u32 cookie); |
12c7f9dc | 263 | extern int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask); |
3be25f49 | 264 | extern void __fsnotify_inode_delete(struct inode *inode); |
ca9c726e | 265 | extern void __fsnotify_vfsmount_delete(struct vfsmount *mnt); |
47882c6f | 266 | extern u32 fsnotify_get_cookie(void); |
90586523 | 267 | |
c28f7e56 EP |
268 | static inline int fsnotify_inode_watches_children(struct inode *inode) |
269 | { | |
270 | /* FS_EVENT_ON_CHILD is set if the inode may care */ | |
271 | if (!(inode->i_fsnotify_mask & FS_EVENT_ON_CHILD)) | |
272 | return 0; | |
273 | /* this inode might care about child events, does it care about the | |
274 | * specific set of events that can happen on a child? */ | |
275 | return inode->i_fsnotify_mask & FS_EVENTS_POSS_ON_CHILD; | |
276 | } | |
277 | ||
278 | /* | |
279 | * Update the dentry with a flag indicating the interest of its parent to receive | |
280 | * filesystem events when those events happens to this dentry->d_inode. | |
281 | */ | |
affda484 | 282 | static inline void fsnotify_update_flags(struct dentry *dentry) |
c28f7e56 | 283 | { |
c28f7e56 EP |
284 | assert_spin_locked(&dentry->d_lock); |
285 | ||
b5c84bf6 NP |
286 | /* |
287 | * Serialisation of setting PARENT_WATCHED on the dentries is provided | |
288 | * by d_lock. If inotify_inode_watched changes after we have taken | |
289 | * d_lock, the following __fsnotify_update_child_dentry_flags call will | |
290 | * find our entry, so it will spin until we complete here, and update | |
291 | * us with the new state. | |
292 | */ | |
affda484 | 293 | if (fsnotify_inode_watches_children(dentry->d_parent->d_inode)) |
c28f7e56 EP |
294 | dentry->d_flags |= DCACHE_FSNOTIFY_PARENT_WATCHED; |
295 | else | |
296 | dentry->d_flags &= ~DCACHE_FSNOTIFY_PARENT_WATCHED; | |
297 | } | |
298 | ||
90586523 EP |
299 | /* called from fsnotify listeners, such as fanotify or dnotify */ |
300 | ||
98612952 | 301 | /* create a new group */ |
0d2e2a1d | 302 | extern struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops); |
98612952 LS |
303 | /* get reference to a group */ |
304 | extern void fsnotify_get_group(struct fsnotify_group *group); | |
ffab8340 | 305 | /* drop reference on a group from fsnotify_alloc_group */ |
90586523 | 306 | extern void fsnotify_put_group(struct fsnotify_group *group); |
12703dbf JK |
307 | /* group destruction begins, stop queuing new events */ |
308 | extern void fsnotify_group_stop_queueing(struct fsnotify_group *group); | |
d8153d4d LS |
309 | /* destroy group */ |
310 | extern void fsnotify_destroy_group(struct fsnotify_group *group); | |
0a6b6bd5 EP |
311 | /* fasync handler function */ |
312 | extern int fsnotify_fasync(int fd, struct file *file, int on); | |
7053aee2 JK |
313 | /* Free event from memory */ |
314 | extern void fsnotify_destroy_event(struct fsnotify_group *group, | |
315 | struct fsnotify_event *event); | |
a2d8bc6c | 316 | /* attach the event to the group notification queue */ |
8ba8fa91 JK |
317 | extern int fsnotify_add_event(struct fsnotify_group *group, |
318 | struct fsnotify_event *event, | |
319 | int (*merge)(struct list_head *, | |
320 | struct fsnotify_event *)); | |
a2d8bc6c EP |
321 | /* true if the group notification queue is empty */ |
322 | extern bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group); | |
323 | /* return, but do not dequeue the first event on the notification queue */ | |
8ba8fa91 | 324 | extern struct fsnotify_event *fsnotify_peek_first_event(struct fsnotify_group *group); |
e4aff117 | 325 | /* return AND dequeue the first event on the notification queue */ |
8ba8fa91 | 326 | extern struct fsnotify_event *fsnotify_remove_first_event(struct fsnotify_group *group); |
a2d8bc6c | 327 | |
3be25f49 EP |
328 | /* functions used to manipulate the marks attached to inodes */ |
329 | ||
0d48b7f0 EP |
330 | /* run all marks associated with a vfsmount and update mnt->mnt_fsnotify_mask */ |
331 | extern void fsnotify_recalc_vfsmount_mask(struct vfsmount *mnt); | |
3be25f49 EP |
332 | /* run all marks associated with an inode and update inode->i_fsnotify_mask */ |
333 | extern void fsnotify_recalc_inode_mask(struct inode *inode); | |
841bdc10 | 334 | extern void fsnotify_init_mark(struct fsnotify_mark *mark, void (*free_mark)(struct fsnotify_mark *mark)); |
3be25f49 | 335 | /* find (and take a reference) to a mark associated with group and inode */ |
5444e298 | 336 | extern struct fsnotify_mark *fsnotify_find_inode_mark(struct fsnotify_group *group, struct inode *inode); |
1c529063 EP |
337 | /* find (and take a reference) to a mark associated with group and vfsmount */ |
338 | extern struct fsnotify_mark *fsnotify_find_vfsmount_mark(struct fsnotify_group *group, struct vfsmount *mnt); | |
33af5e32 EP |
339 | /* set the ignored_mask of a mark */ |
340 | extern void fsnotify_set_mark_ignored_mask_locked(struct fsnotify_mark *mark, __u32 mask); | |
90b1e7a5 EP |
341 | /* set the mask of a mark (might pin the object into memory */ |
342 | extern void fsnotify_set_mark_mask_locked(struct fsnotify_mark *mark, __u32 mask); | |
3be25f49 | 343 | /* attach the mark to both the group and the inode */ |
5444e298 EP |
344 | extern int fsnotify_add_mark(struct fsnotify_mark *mark, struct fsnotify_group *group, |
345 | struct inode *inode, struct vfsmount *mnt, int allow_dups); | |
d5a335b8 LS |
346 | extern int fsnotify_add_mark_locked(struct fsnotify_mark *mark, struct fsnotify_group *group, |
347 | struct inode *inode, struct vfsmount *mnt, int allow_dups); | |
e2a29943 LS |
348 | /* given a group and a mark, flag mark to be freed when all references are dropped */ |
349 | extern void fsnotify_destroy_mark(struct fsnotify_mark *mark, | |
350 | struct fsnotify_group *group); | |
4712e722 JK |
351 | /* detach mark from inode / mount list, group list, drop inode reference */ |
352 | extern void fsnotify_detach_mark(struct fsnotify_mark *mark); | |
353 | /* free mark */ | |
354 | extern void fsnotify_free_mark(struct fsnotify_mark *mark); | |
4d92604c EP |
355 | /* run all the marks in a group, and clear all of the vfsmount marks */ |
356 | extern void fsnotify_clear_vfsmount_marks_by_group(struct fsnotify_group *group); | |
357 | /* run all the marks in a group, and clear all of the inode marks */ | |
358 | extern void fsnotify_clear_inode_marks_by_group(struct fsnotify_group *group); | |
86ffe245 | 359 | /* run all the marks in a group, and clear all of the marks attached to given object type */ |
4d92604c | 360 | extern void fsnotify_clear_marks_by_group_flags(struct fsnotify_group *group, unsigned int flags); |
9dd813c1 | 361 | extern void fsnotify_connector_free(struct fsnotify_mark_connector **connp); |
841bdc10 EP |
362 | extern void fsnotify_get_mark(struct fsnotify_mark *mark); |
363 | extern void fsnotify_put_mark(struct fsnotify_mark *mark); | |
74278da9 | 364 | extern void fsnotify_unmount_inodes(struct super_block *sb); |
3be25f49 | 365 | |
90586523 | 366 | /* put here because inotify does some weird stuff when destroying watches */ |
7053aee2 JK |
367 | extern void fsnotify_init_event(struct fsnotify_event *event, |
368 | struct inode *to_tell, u32 mask); | |
b4e4e140 | 369 | |
90586523 EP |
370 | #else |
371 | ||
e637835e | 372 | static inline int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is, |
c4ec54b4 EP |
373 | const unsigned char *name, u32 cookie) |
374 | { | |
375 | return 0; | |
376 | } | |
3be25f49 | 377 | |
12c7f9dc | 378 | static inline int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask) |
52420392 EP |
379 | { |
380 | return 0; | |
381 | } | |
c28f7e56 | 382 | |
3be25f49 EP |
383 | static inline void __fsnotify_inode_delete(struct inode *inode) |
384 | {} | |
385 | ||
ca9c726e AG |
386 | static inline void __fsnotify_vfsmount_delete(struct vfsmount *mnt) |
387 | {} | |
388 | ||
affda484 | 389 | static inline void fsnotify_update_flags(struct dentry *dentry) |
c28f7e56 EP |
390 | {} |
391 | ||
47882c6f EP |
392 | static inline u32 fsnotify_get_cookie(void) |
393 | { | |
394 | return 0; | |
395 | } | |
396 | ||
74278da9 | 397 | static inline void fsnotify_unmount_inodes(struct super_block *sb) |
164bc619 EP |
398 | {} |
399 | ||
90586523 EP |
400 | #endif /* CONFIG_FSNOTIFY */ |
401 | ||
402 | #endif /* __KERNEL __ */ | |
403 | ||
404 | #endif /* __LINUX_FSNOTIFY_BACKEND_H */ |