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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; |
abc77577 | 83 | struct fsnotify_iter_info; |
90586523 EP |
84 | |
85 | /* | |
86 | * Each group much define these ops. The fsnotify infrastructure will call | |
87 | * these operations for each relevant group. | |
88 | * | |
89 | * handle_event - main call for a group to handle an fs event | |
90 | * free_group_priv - called when a group refcnt hits 0 to clean up the private union | |
6960b0d9 LS |
91 | * freeing_mark - called when a mark is being destroyed for some reason. The group |
92 | * MUST be holding a reference on each mark and that reference must be | |
93 | * dropped in this function. inotify uses this function to send | |
94 | * userspace messages that marks have been removed. | |
90586523 EP |
95 | */ |
96 | struct fsnotify_ops { | |
ce8f76fb | 97 | int (*handle_event)(struct fsnotify_group *group, |
7053aee2 | 98 | struct inode *inode, |
ce8f76fb EP |
99 | struct fsnotify_mark *inode_mark, |
100 | struct fsnotify_mark *vfsmount_mark, | |
3cd5eca8 | 101 | u32 mask, const void *data, int data_type, |
9385a84d JK |
102 | const unsigned char *file_name, u32 cookie, |
103 | struct fsnotify_iter_info *iter_info); | |
90586523 | 104 | void (*free_group_priv)(struct fsnotify_group *group); |
841bdc10 | 105 | void (*freeing_mark)(struct fsnotify_mark *mark, struct fsnotify_group *group); |
7053aee2 JK |
106 | void (*free_event)(struct fsnotify_event *event); |
107 | }; | |
108 | ||
109 | /* | |
110 | * all of the information about the original object we want to now send to | |
111 | * a group. If you want to carry more info from the accessing task to the | |
112 | * listener this structure is where you need to be adding fields. | |
113 | */ | |
114 | struct fsnotify_event { | |
115 | struct list_head list; | |
116 | /* inode may ONLY be dereferenced during handle_event(). */ | |
117 | struct inode *inode; /* either the inode the event happened to or its parent */ | |
118 | u32 mask; /* the type of access, bitwise OR for FS_* event types */ | |
90586523 EP |
119 | }; |
120 | ||
121 | /* | |
122 | * A group is a "thing" that wants to receive notification about filesystem | |
123 | * events. The mask holds the subset of event types this group cares about. | |
124 | * refcnt on a group is up to the implementor and at any moment if it goes 0 | |
125 | * everything will be cleaned up. | |
126 | */ | |
127 | struct fsnotify_group { | |
90586523 EP |
128 | /* |
129 | * How the refcnt is used is up to each group. When the refcnt hits 0 | |
130 | * fsnotify will clean up all of the resources associated with this group. | |
131 | * As an example, the dnotify group will always have a refcnt=1 and that | |
132 | * will never change. Inotify, on the other hand, has a group per | |
133 | * inotify_init() and the refcnt will hit 0 only when that fd has been | |
134 | * closed. | |
135 | */ | |
136 | atomic_t refcnt; /* things with interest in this group */ | |
90586523 EP |
137 | |
138 | const struct fsnotify_ops *ops; /* how this group handles things */ | |
139 | ||
a2d8bc6c | 140 | /* needed to send notification to userspace */ |
c21dbe20 | 141 | spinlock_t notification_lock; /* protect the notification_list */ |
a2d8bc6c EP |
142 | struct list_head notification_list; /* list of event_holder this group needs to send to userspace */ |
143 | wait_queue_head_t notification_waitq; /* read() on the notification file blocks on this waitq */ | |
144 | unsigned int q_len; /* events on the queue */ | |
145 | unsigned int max_events; /* maximum events allowed on the list */ | |
6ad2d4e3 EP |
146 | /* |
147 | * Valid fsnotify group priorities. Events are send in order from highest | |
148 | * priority to lowest priority. We default to the lowest priority. | |
149 | */ | |
150 | #define FS_PRIO_0 0 /* normal notifiers, no permissions */ | |
151 | #define FS_PRIO_1 1 /* fanotify content based access control */ | |
152 | #define FS_PRIO_2 2 /* fanotify pre-content access */ | |
153 | unsigned int priority; | |
12703dbf | 154 | bool shutdown; /* group is being shut down, don't queue more events */ |
a2d8bc6c | 155 | |
e61ce867 | 156 | /* stores all fastpath marks assoc with this group so they can be cleaned on unregister */ |
986ab098 | 157 | struct mutex mark_mutex; /* protect marks_list */ |
841bdc10 | 158 | atomic_t num_marks; /* 1 for each mark and 1 for not being |
3be25f49 EP |
159 | * past the point of no return when freeing |
160 | * a group */ | |
e61ce867 | 161 | struct list_head marks_list; /* all inode marks for this group */ |
3be25f49 | 162 | |
7053aee2 JK |
163 | struct fasync_struct *fsn_fa; /* async notification */ |
164 | ||
ff57cd58 | 165 | struct fsnotify_event *overflow_event; /* Event we queue when the |
7053aee2 JK |
166 | * notification list is too |
167 | * full */ | |
abc77577 JK |
168 | atomic_t user_waits; /* Number of tasks waiting for user |
169 | * response */ | |
0a6b6bd5 | 170 | |
90586523 EP |
171 | /* groups can define private fields here or use the void *private */ |
172 | union { | |
173 | void *private; | |
63c882a0 EP |
174 | #ifdef CONFIG_INOTIFY_USER |
175 | struct inotify_group_private_data { | |
176 | spinlock_t idr_lock; | |
177 | struct idr idr; | |
1cce1eea | 178 | struct ucounts *ucounts; |
63c882a0 | 179 | } inotify_data; |
9e66e423 | 180 | #endif |
80af2588 | 181 | #ifdef CONFIG_FANOTIFY |
9e66e423 | 182 | struct fanotify_group_private_data { |
80af2588 | 183 | #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS |
9e66e423 | 184 | /* allows a group to block waiting for a userspace response */ |
9e66e423 EP |
185 | struct list_head access_list; |
186 | wait_queue_head_t access_waitq; | |
80af2588 EP |
187 | #endif /* CONFIG_FANOTIFY_ACCESS_PERMISSIONS */ |
188 | int f_flags; | |
e7099d8a | 189 | unsigned int max_marks; |
4afeff85 | 190 | struct user_struct *user; |
9e66e423 | 191 | } fanotify_data; |
80af2588 | 192 | #endif /* CONFIG_FANOTIFY */ |
90586523 EP |
193 | }; |
194 | }; | |
195 | ||
90586523 EP |
196 | /* when calling fsnotify tell it if the data is a path or inode */ |
197 | #define FSNOTIFY_EVENT_NONE 0 | |
2069601b | 198 | #define FSNOTIFY_EVENT_PATH 1 |
90586523 | 199 | #define FSNOTIFY_EVENT_INODE 2 |
90586523 | 200 | |
9dd813c1 JK |
201 | /* |
202 | * Inode / vfsmount point to this structure which tracks all marks attached to | |
e911d8af | 203 | * the inode / vfsmount. The reference to inode / vfsmount is held by this |
08991e83 JK |
204 | * structure. We destroy this structure when there are no more marks attached |
205 | * to it. The structure is protected by fsnotify_mark_srcu. | |
9dd813c1 JK |
206 | */ |
207 | struct fsnotify_mark_connector { | |
04662cab | 208 | spinlock_t lock; |
86ffe245 JK |
209 | #define FSNOTIFY_OBJ_TYPE_INODE 0x01 |
210 | #define FSNOTIFY_OBJ_TYPE_VFSMOUNT 0x02 | |
2e37c6ca JK |
211 | #define FSNOTIFY_OBJ_ALL_TYPES (FSNOTIFY_OBJ_TYPE_INODE | \ |
212 | FSNOTIFY_OBJ_TYPE_VFSMOUNT) | |
86ffe245 JK |
213 | unsigned int flags; /* Type of object [lock] */ |
214 | union { /* Object pointer [lock] */ | |
215 | struct inode *inode; | |
216 | struct vfsmount *mnt; | |
217 | }; | |
08991e83 JK |
218 | union { |
219 | struct hlist_head list; | |
220 | /* Used listing heads to free after srcu period expires */ | |
221 | struct fsnotify_mark_connector *destroy_next; | |
222 | }; | |
9dd813c1 JK |
223 | }; |
224 | ||
3be25f49 | 225 | /* |
1e39fc01 | 226 | * A mark is simply an object attached to an in core inode which allows an |
3be25f49 EP |
227 | * fsnotify listener to indicate they are either no longer interested in events |
228 | * of a type matching mask or only interested in those events. | |
229 | * | |
1e39fc01 JK |
230 | * These are flushed when an inode is evicted from core and may be flushed |
231 | * when the inode is modified (as seen by fsnotify_access). Some fsnotify | |
232 | * users (such as dnotify) will flush these when the open fd is closed and not | |
233 | * at inode eviction or modification. | |
234 | * | |
235 | * Text in brackets is showing the lock(s) protecting modifications of a | |
236 | * particular entry. obj_lock means either inode->i_lock or | |
237 | * mnt->mnt_root->d_lock depending on the mark type. | |
3be25f49 | 238 | */ |
e61ce867 | 239 | struct fsnotify_mark { |
1e39fc01 JK |
240 | /* Mask this mark is for [mark->lock, group->mark_mutex] */ |
241 | __u32 mask; | |
242 | /* We hold one for presence in g_list. Also one ref for each 'thing' | |
3be25f49 | 243 | * in kernel that found and may be using this mark. */ |
1e39fc01 JK |
244 | atomic_t refcnt; |
245 | /* Group this mark is for. Set on mark creation, stable until last ref | |
246 | * is dropped */ | |
247 | struct fsnotify_group *group; | |
248 | /* List of marks by group->i_fsnotify_marks. Also reused for queueing | |
249 | * mark into destroy_list when it's waiting for the end of SRCU period | |
250 | * before it can be freed. [group->mark_mutex] */ | |
13d34ac6 | 251 | struct list_head g_list; |
1e39fc01 JK |
252 | /* Protects inode / mnt pointers, flags, masks */ |
253 | spinlock_t lock; | |
6b3f05d2 | 254 | /* List of marks for inode / vfsmount [connector->lock, mark ref] */ |
1e39fc01 | 255 | struct hlist_node obj_list; |
6b3f05d2 | 256 | /* Head of list of marks for an object [mark ref] */ |
86ffe245 | 257 | struct fsnotify_mark_connector *connector; |
1e39fc01 JK |
258 | /* Events types to ignore [mark->lock, group->mark_mutex] */ |
259 | __u32 ignored_mask; | |
e911d8af JK |
260 | #define FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY 0x01 |
261 | #define FSNOTIFY_MARK_FLAG_ALIVE 0x02 | |
262 | #define FSNOTIFY_MARK_FLAG_ATTACHED 0x04 | |
1e39fc01 | 263 | unsigned int flags; /* flags [mark->lock] */ |
841bdc10 | 264 | void (*free_mark)(struct fsnotify_mark *mark); /* called on final put+free */ |
3be25f49 EP |
265 | }; |
266 | ||
90586523 EP |
267 | #ifdef CONFIG_FSNOTIFY |
268 | ||
269 | /* called from the vfs helpers */ | |
270 | ||
271 | /* main fsnotify call to send events */ | |
e637835e | 272 | extern int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is, |
c4ec54b4 | 273 | const unsigned char *name, u32 cookie); |
12c7f9dc | 274 | extern int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask); |
3be25f49 | 275 | extern void __fsnotify_inode_delete(struct inode *inode); |
ca9c726e | 276 | extern void __fsnotify_vfsmount_delete(struct vfsmount *mnt); |
47882c6f | 277 | extern u32 fsnotify_get_cookie(void); |
90586523 | 278 | |
c28f7e56 EP |
279 | static inline int fsnotify_inode_watches_children(struct inode *inode) |
280 | { | |
281 | /* FS_EVENT_ON_CHILD is set if the inode may care */ | |
282 | if (!(inode->i_fsnotify_mask & FS_EVENT_ON_CHILD)) | |
283 | return 0; | |
284 | /* this inode might care about child events, does it care about the | |
285 | * specific set of events that can happen on a child? */ | |
286 | return inode->i_fsnotify_mask & FS_EVENTS_POSS_ON_CHILD; | |
287 | } | |
288 | ||
289 | /* | |
290 | * Update the dentry with a flag indicating the interest of its parent to receive | |
291 | * filesystem events when those events happens to this dentry->d_inode. | |
292 | */ | |
affda484 | 293 | static inline void fsnotify_update_flags(struct dentry *dentry) |
c28f7e56 | 294 | { |
c28f7e56 EP |
295 | assert_spin_locked(&dentry->d_lock); |
296 | ||
b5c84bf6 NP |
297 | /* |
298 | * Serialisation of setting PARENT_WATCHED on the dentries is provided | |
299 | * by d_lock. If inotify_inode_watched changes after we have taken | |
300 | * d_lock, the following __fsnotify_update_child_dentry_flags call will | |
301 | * find our entry, so it will spin until we complete here, and update | |
302 | * us with the new state. | |
303 | */ | |
affda484 | 304 | if (fsnotify_inode_watches_children(dentry->d_parent->d_inode)) |
c28f7e56 EP |
305 | dentry->d_flags |= DCACHE_FSNOTIFY_PARENT_WATCHED; |
306 | else | |
307 | dentry->d_flags &= ~DCACHE_FSNOTIFY_PARENT_WATCHED; | |
308 | } | |
309 | ||
90586523 EP |
310 | /* called from fsnotify listeners, such as fanotify or dnotify */ |
311 | ||
98612952 | 312 | /* create a new group */ |
0d2e2a1d | 313 | extern struct fsnotify_group *fsnotify_alloc_group(const struct fsnotify_ops *ops); |
98612952 LS |
314 | /* get reference to a group */ |
315 | extern void fsnotify_get_group(struct fsnotify_group *group); | |
ffab8340 | 316 | /* drop reference on a group from fsnotify_alloc_group */ |
90586523 | 317 | extern void fsnotify_put_group(struct fsnotify_group *group); |
12703dbf JK |
318 | /* group destruction begins, stop queuing new events */ |
319 | extern void fsnotify_group_stop_queueing(struct fsnotify_group *group); | |
d8153d4d LS |
320 | /* destroy group */ |
321 | extern void fsnotify_destroy_group(struct fsnotify_group *group); | |
0a6b6bd5 EP |
322 | /* fasync handler function */ |
323 | extern int fsnotify_fasync(int fd, struct file *file, int on); | |
7053aee2 JK |
324 | /* Free event from memory */ |
325 | extern void fsnotify_destroy_event(struct fsnotify_group *group, | |
326 | struct fsnotify_event *event); | |
a2d8bc6c | 327 | /* attach the event to the group notification queue */ |
8ba8fa91 JK |
328 | extern int fsnotify_add_event(struct fsnotify_group *group, |
329 | struct fsnotify_event *event, | |
330 | int (*merge)(struct list_head *, | |
331 | struct fsnotify_event *)); | |
a2d8bc6c EP |
332 | /* true if the group notification queue is empty */ |
333 | extern bool fsnotify_notify_queue_is_empty(struct fsnotify_group *group); | |
334 | /* return, but do not dequeue the first event on the notification queue */ | |
8ba8fa91 | 335 | extern struct fsnotify_event *fsnotify_peek_first_event(struct fsnotify_group *group); |
e4aff117 | 336 | /* return AND dequeue the first event on the notification queue */ |
8ba8fa91 | 337 | extern struct fsnotify_event *fsnotify_remove_first_event(struct fsnotify_group *group); |
a2d8bc6c | 338 | |
3be25f49 EP |
339 | /* functions used to manipulate the marks attached to inodes */ |
340 | ||
a242677b JK |
341 | /* Calculate mask of events for a list of marks */ |
342 | extern void fsnotify_recalc_mask(struct fsnotify_mark_connector *conn); | |
7b129323 JK |
343 | extern void fsnotify_init_mark(struct fsnotify_mark *mark, |
344 | struct fsnotify_group *group, | |
345 | void (*free_mark)(struct fsnotify_mark *mark)); | |
b1362edf JK |
346 | /* Find mark belonging to given group in the list of marks */ |
347 | extern struct fsnotify_mark *fsnotify_find_mark( | |
348 | struct fsnotify_mark_connector __rcu **connp, | |
349 | struct fsnotify_group *group); | |
7b129323 JK |
350 | /* attach the mark to the inode or vfsmount */ |
351 | extern int fsnotify_add_mark(struct fsnotify_mark *mark, struct inode *inode, | |
352 | struct vfsmount *mnt, int allow_dups); | |
353 | extern int fsnotify_add_mark_locked(struct fsnotify_mark *mark, | |
d5a335b8 | 354 | struct inode *inode, struct vfsmount *mnt, int allow_dups); |
e2a29943 LS |
355 | /* given a group and a mark, flag mark to be freed when all references are dropped */ |
356 | extern void fsnotify_destroy_mark(struct fsnotify_mark *mark, | |
357 | struct fsnotify_group *group); | |
4712e722 JK |
358 | /* detach mark from inode / mount list, group list, drop inode reference */ |
359 | extern void fsnotify_detach_mark(struct fsnotify_mark *mark); | |
360 | /* free mark */ | |
361 | extern void fsnotify_free_mark(struct fsnotify_mark *mark); | |
86ffe245 | 362 | /* run all the marks in a group, and clear all of the marks attached to given object type */ |
18f2e0d3 | 363 | extern void fsnotify_clear_marks_by_group(struct fsnotify_group *group, unsigned int type); |
416bcdbc JK |
364 | /* run all the marks in a group, and clear all of the vfsmount marks */ |
365 | static inline void fsnotify_clear_vfsmount_marks_by_group(struct fsnotify_group *group) | |
366 | { | |
18f2e0d3 | 367 | fsnotify_clear_marks_by_group(group, FSNOTIFY_OBJ_TYPE_VFSMOUNT); |
416bcdbc JK |
368 | } |
369 | /* run all the marks in a group, and clear all of the inode marks */ | |
370 | static inline void fsnotify_clear_inode_marks_by_group(struct fsnotify_group *group) | |
371 | { | |
18f2e0d3 | 372 | fsnotify_clear_marks_by_group(group, FSNOTIFY_OBJ_TYPE_INODE); |
416bcdbc | 373 | } |
841bdc10 EP |
374 | extern void fsnotify_get_mark(struct fsnotify_mark *mark); |
375 | extern void fsnotify_put_mark(struct fsnotify_mark *mark); | |
74278da9 | 376 | extern void fsnotify_unmount_inodes(struct super_block *sb); |
abc77577 JK |
377 | extern void fsnotify_finish_user_wait(struct fsnotify_iter_info *iter_info); |
378 | extern bool fsnotify_prepare_user_wait(struct fsnotify_iter_info *iter_info); | |
3be25f49 | 379 | |
90586523 | 380 | /* put here because inotify does some weird stuff when destroying watches */ |
7053aee2 JK |
381 | extern void fsnotify_init_event(struct fsnotify_event *event, |
382 | struct inode *to_tell, u32 mask); | |
b4e4e140 | 383 | |
90586523 EP |
384 | #else |
385 | ||
e637835e | 386 | static inline int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is, |
c4ec54b4 EP |
387 | const unsigned char *name, u32 cookie) |
388 | { | |
389 | return 0; | |
390 | } | |
3be25f49 | 391 | |
12c7f9dc | 392 | static inline int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask) |
52420392 EP |
393 | { |
394 | return 0; | |
395 | } | |
c28f7e56 | 396 | |
3be25f49 EP |
397 | static inline void __fsnotify_inode_delete(struct inode *inode) |
398 | {} | |
399 | ||
ca9c726e AG |
400 | static inline void __fsnotify_vfsmount_delete(struct vfsmount *mnt) |
401 | {} | |
402 | ||
affda484 | 403 | static inline void fsnotify_update_flags(struct dentry *dentry) |
c28f7e56 EP |
404 | {} |
405 | ||
47882c6f EP |
406 | static inline u32 fsnotify_get_cookie(void) |
407 | { | |
408 | return 0; | |
409 | } | |
410 | ||
74278da9 | 411 | static inline void fsnotify_unmount_inodes(struct super_block *sb) |
164bc619 EP |
412 | {} |
413 | ||
90586523 EP |
414 | #endif /* CONFIG_FSNOTIFY */ |
415 | ||
416 | #endif /* __KERNEL __ */ | |
417 | ||
418 | #endif /* __LINUX_FSNOTIFY_BACKEND_H */ |