Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0-or-later
2 : /*
3 : * Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com>
4 : */
5 :
6 : #include <linux/dcache.h>
7 : #include <linux/fs.h>
8 : #include <linux/gfp.h>
9 : #include <linux/init.h>
10 : #include <linux/module.h>
11 : #include <linux/mount.h>
12 : #include <linux/srcu.h>
13 :
14 : #include <linux/fsnotify_backend.h>
15 : #include "fsnotify.h"
16 :
17 : /*
18 : * Clear all of the marks on an inode when it is being evicted from core
19 : */
20 0 : void __fsnotify_inode_delete(struct inode *inode)
21 : {
22 0 : fsnotify_clear_marks_by_inode(inode);
23 0 : }
24 : EXPORT_SYMBOL_GPL(__fsnotify_inode_delete);
25 :
26 0 : void __fsnotify_vfsmount_delete(struct vfsmount *mnt)
27 : {
28 0 : fsnotify_clear_marks_by_mount(mnt);
29 0 : }
30 :
31 : /**
32 : * fsnotify_unmount_inodes - an sb is unmounting. handle any watched inodes.
33 : * @sb: superblock being unmounted.
34 : *
35 : * Called during unmount with no locks held, so needs to be safe against
36 : * concurrent modifiers. We temporarily drop sb->s_inode_list_lock and CAN block.
37 : */
38 0 : static void fsnotify_unmount_inodes(struct super_block *sb)
39 : {
40 0 : struct inode *inode, *iput_inode = NULL;
41 :
42 0 : spin_lock(&sb->s_inode_list_lock);
43 0 : list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
44 : /*
45 : * We cannot __iget() an inode in state I_FREEING,
46 : * I_WILL_FREE, or I_NEW which is fine because by that point
47 : * the inode cannot have any associated watches.
48 : */
49 0 : spin_lock(&inode->i_lock);
50 0 : if (inode->i_state & (I_FREEING|I_WILL_FREE|I_NEW)) {
51 0 : spin_unlock(&inode->i_lock);
52 0 : continue;
53 : }
54 :
55 : /*
56 : * If i_count is zero, the inode cannot have any watches and
57 : * doing an __iget/iput with SB_ACTIVE clear would actually
58 : * evict all inodes with zero i_count from icache which is
59 : * unnecessarily violent and may in fact be illegal to do.
60 : * However, we should have been called /after/ evict_inodes
61 : * removed all zero refcount inodes, in any case. Test to
62 : * be sure.
63 : */
64 0 : if (!atomic_read(&inode->i_count)) {
65 0 : spin_unlock(&inode->i_lock);
66 0 : continue;
67 : }
68 :
69 0 : __iget(inode);
70 0 : spin_unlock(&inode->i_lock);
71 0 : spin_unlock(&sb->s_inode_list_lock);
72 :
73 0 : iput(iput_inode);
74 :
75 : /* for each watch, send FS_UNMOUNT and then remove it */
76 0 : fsnotify_inode(inode, FS_UNMOUNT);
77 :
78 0 : fsnotify_inode_delete(inode);
79 :
80 0 : iput_inode = inode;
81 :
82 0 : cond_resched();
83 0 : spin_lock(&sb->s_inode_list_lock);
84 : }
85 0 : spin_unlock(&sb->s_inode_list_lock);
86 :
87 0 : iput(iput_inode);
88 0 : }
89 :
90 0 : void fsnotify_sb_delete(struct super_block *sb)
91 : {
92 0 : fsnotify_unmount_inodes(sb);
93 0 : fsnotify_clear_marks_by_sb(sb);
94 : /* Wait for outstanding object references from connectors */
95 0 : wait_var_event(&sb->s_fsnotify_connectors,
96 : !atomic_long_read(&sb->s_fsnotify_connectors));
97 0 : }
98 :
99 : /*
100 : * Given an inode, first check if we care what happens to our children. Inotify
101 : * and dnotify both tell their parents about events. If we care about any event
102 : * on a child we run all of our children and set a dentry flag saying that the
103 : * parent cares. Thus when an event happens on a child it can quickly tell if
104 : * if there is a need to find a parent and send the event to the parent.
105 : */
106 0 : void __fsnotify_update_child_dentry_flags(struct inode *inode)
107 : {
108 : struct dentry *alias;
109 : int watched;
110 :
111 0 : if (!S_ISDIR(inode->i_mode))
112 : return;
113 :
114 : /* determine if the children should tell inode about their events */
115 0 : watched = fsnotify_inode_watches_children(inode);
116 :
117 0 : spin_lock(&inode->i_lock);
118 : /* run all of the dentries associated with this inode. Since this is a
119 : * directory, there damn well better only be one item on this list */
120 0 : hlist_for_each_entry(alias, &inode->i_dentry, d_u.d_alias) {
121 : struct dentry *child;
122 :
123 : /* run all of the children of the original inode and fix their
124 : * d_flags to indicate parental interest (their parent is the
125 : * original inode) */
126 0 : spin_lock(&alias->d_lock);
127 0 : list_for_each_entry(child, &alias->d_subdirs, d_child) {
128 0 : if (!child->d_inode)
129 0 : continue;
130 :
131 0 : spin_lock_nested(&child->d_lock, DENTRY_D_LOCK_NESTED);
132 0 : if (watched)
133 0 : child->d_flags |= DCACHE_FSNOTIFY_PARENT_WATCHED;
134 : else
135 0 : child->d_flags &= ~DCACHE_FSNOTIFY_PARENT_WATCHED;
136 0 : spin_unlock(&child->d_lock);
137 : }
138 0 : spin_unlock(&alias->d_lock);
139 : }
140 0 : spin_unlock(&inode->i_lock);
141 : }
142 :
143 : /* Are inode/sb/mount interested in parent and name info with this event? */
144 0 : static bool fsnotify_event_needs_parent(struct inode *inode, struct mount *mnt,
145 : __u32 mask)
146 : {
147 0 : __u32 marks_mask = 0;
148 :
149 : /* We only send parent/name to inode/sb/mount for events on non-dir */
150 0 : if (mask & FS_ISDIR)
151 : return false;
152 :
153 : /*
154 : * All events that are possible on child can also may be reported with
155 : * parent/name info to inode/sb/mount. Otherwise, a watching parent
156 : * could result in events reported with unexpected name info to sb/mount.
157 : */
158 : BUILD_BUG_ON(FS_EVENTS_POSS_ON_CHILD & ~FS_EVENTS_POSS_TO_PARENT);
159 :
160 : /* Did either inode/sb/mount subscribe for events with parent/name? */
161 0 : marks_mask |= fsnotify_parent_needed_mask(inode->i_fsnotify_mask);
162 0 : marks_mask |= fsnotify_parent_needed_mask(inode->i_sb->s_fsnotify_mask);
163 0 : if (mnt)
164 0 : marks_mask |= fsnotify_parent_needed_mask(mnt->mnt_fsnotify_mask);
165 :
166 : /* Did they subscribe for this event with parent/name info? */
167 0 : return mask & marks_mask;
168 : }
169 :
170 : /*
171 : * Notify this dentry's parent about a child's events with child name info
172 : * if parent is watching or if inode/sb/mount are interested in events with
173 : * parent and name info.
174 : *
175 : * Notify only the child without name info if parent is not watching and
176 : * inode/sb/mount are not interested in events with parent and name info.
177 : */
178 0 : int __fsnotify_parent(struct dentry *dentry, __u32 mask, const void *data,
179 : int data_type)
180 : {
181 0 : const struct path *path = fsnotify_data_path(data, data_type);
182 0 : struct mount *mnt = path ? real_mount(path->mnt) : NULL;
183 0 : struct inode *inode = d_inode(dentry);
184 : struct dentry *parent;
185 0 : bool parent_watched = dentry->d_flags & DCACHE_FSNOTIFY_PARENT_WATCHED;
186 : bool parent_needed, parent_interested;
187 : __u32 p_mask;
188 0 : struct inode *p_inode = NULL;
189 : struct name_snapshot name;
190 0 : struct qstr *file_name = NULL;
191 0 : int ret = 0;
192 :
193 : /*
194 : * Do inode/sb/mount care about parent and name info on non-dir?
195 : * Do they care about any event at all?
196 : */
197 0 : if (!inode->i_fsnotify_marks && !inode->i_sb->s_fsnotify_marks &&
198 0 : (!mnt || !mnt->mnt_fsnotify_marks) && !parent_watched)
199 : return 0;
200 :
201 0 : parent = NULL;
202 0 : parent_needed = fsnotify_event_needs_parent(inode, mnt, mask);
203 0 : if (!parent_watched && !parent_needed)
204 : goto notify;
205 :
206 : /* Does parent inode care about events on children? */
207 0 : parent = dget_parent(dentry);
208 0 : p_inode = parent->d_inode;
209 0 : p_mask = fsnotify_inode_watches_children(p_inode);
210 0 : if (unlikely(parent_watched && !p_mask))
211 0 : __fsnotify_update_child_dentry_flags(p_inode);
212 :
213 : /*
214 : * Include parent/name in notification either if some notification
215 : * groups require parent info or the parent is interested in this event.
216 : */
217 0 : parent_interested = mask & p_mask & ALL_FSNOTIFY_EVENTS;
218 0 : if (parent_needed || parent_interested) {
219 : /* When notifying parent, child should be passed as data */
220 0 : WARN_ON_ONCE(inode != fsnotify_data_inode(data, data_type));
221 :
222 : /* Notify both parent and child with child name info */
223 0 : take_dentry_name_snapshot(&name, dentry);
224 0 : file_name = &name.name;
225 0 : if (parent_interested)
226 0 : mask |= FS_EVENT_ON_CHILD;
227 : }
228 :
229 : notify:
230 0 : ret = fsnotify(mask, data, data_type, p_inode, file_name, inode, 0);
231 :
232 0 : if (file_name)
233 0 : release_dentry_name_snapshot(&name);
234 0 : dput(parent);
235 :
236 0 : return ret;
237 : }
238 : EXPORT_SYMBOL_GPL(__fsnotify_parent);
239 :
240 0 : static int fsnotify_handle_inode_event(struct fsnotify_group *group,
241 : struct fsnotify_mark *inode_mark,
242 : u32 mask, const void *data, int data_type,
243 : struct inode *dir, const struct qstr *name,
244 : u32 cookie)
245 : {
246 0 : const struct path *path = fsnotify_data_path(data, data_type);
247 0 : struct inode *inode = fsnotify_data_inode(data, data_type);
248 0 : const struct fsnotify_ops *ops = group->ops;
249 :
250 0 : if (WARN_ON_ONCE(!ops->handle_inode_event))
251 : return 0;
252 :
253 0 : if (WARN_ON_ONCE(!inode && !dir))
254 : return 0;
255 :
256 0 : if ((inode_mark->mask & FS_EXCL_UNLINK) &&
257 0 : path && d_unlinked(path->dentry))
258 : return 0;
259 :
260 : /* Check interest of this mark in case event was sent with two marks */
261 0 : if (!(mask & inode_mark->mask & ALL_FSNOTIFY_EVENTS))
262 : return 0;
263 :
264 0 : return ops->handle_inode_event(inode_mark, mask, inode, dir, name, cookie);
265 : }
266 :
267 0 : static int fsnotify_handle_event(struct fsnotify_group *group, __u32 mask,
268 : const void *data, int data_type,
269 : struct inode *dir, const struct qstr *name,
270 : u32 cookie, struct fsnotify_iter_info *iter_info)
271 : {
272 0 : struct fsnotify_mark *inode_mark = fsnotify_iter_inode_mark(iter_info);
273 0 : struct fsnotify_mark *parent_mark = fsnotify_iter_parent_mark(iter_info);
274 : int ret;
275 :
276 0 : if (WARN_ON_ONCE(fsnotify_iter_sb_mark(iter_info)) ||
277 0 : WARN_ON_ONCE(fsnotify_iter_vfsmount_mark(iter_info)))
278 : return 0;
279 :
280 : /*
281 : * For FS_RENAME, 'dir' is old dir and 'data' is new dentry.
282 : * The only ->handle_inode_event() backend that supports FS_RENAME is
283 : * dnotify, where it means file was renamed within same parent.
284 : */
285 0 : if (mask & FS_RENAME) {
286 0 : struct dentry *moved = fsnotify_data_dentry(data, data_type);
287 :
288 0 : if (dir != moved->d_parent->d_inode)
289 : return 0;
290 : }
291 :
292 0 : if (parent_mark) {
293 : /*
294 : * parent_mark indicates that the parent inode is watching
295 : * children and interested in this event, which is an event
296 : * possible on child. But is *this mark* watching children and
297 : * interested in this event?
298 : */
299 0 : if (parent_mark->mask & FS_EVENT_ON_CHILD) {
300 0 : ret = fsnotify_handle_inode_event(group, parent_mark, mask,
301 : data, data_type, dir, name, 0);
302 0 : if (ret)
303 : return ret;
304 : }
305 0 : if (!inode_mark)
306 : return 0;
307 : }
308 :
309 0 : if (mask & FS_EVENT_ON_CHILD) {
310 : /*
311 : * Some events can be sent on both parent dir and child marks
312 : * (e.g. FS_ATTRIB). If both parent dir and child are
313 : * watching, report the event once to parent dir with name (if
314 : * interested) and once to child without name (if interested).
315 : * The child watcher is expecting an event without a file name
316 : * and without the FS_EVENT_ON_CHILD flag.
317 : */
318 0 : mask &= ~FS_EVENT_ON_CHILD;
319 0 : dir = NULL;
320 0 : name = NULL;
321 : }
322 :
323 0 : return fsnotify_handle_inode_event(group, inode_mark, mask, data, data_type,
324 : dir, name, cookie);
325 : }
326 :
327 0 : static int send_to_group(__u32 mask, const void *data, int data_type,
328 : struct inode *dir, const struct qstr *file_name,
329 : u32 cookie, struct fsnotify_iter_info *iter_info)
330 : {
331 0 : struct fsnotify_group *group = NULL;
332 0 : __u32 test_mask = (mask & ALL_FSNOTIFY_EVENTS);
333 0 : __u32 marks_mask = 0;
334 0 : __u32 marks_ignored_mask = 0;
335 : struct fsnotify_mark *mark;
336 : int type;
337 :
338 0 : if (WARN_ON(!iter_info->report_mask))
339 : return 0;
340 :
341 : /* clear ignored on inode modification */
342 0 : if (mask & FS_MODIFY) {
343 0 : fsnotify_foreach_iter_type(type) {
344 0 : if (!fsnotify_iter_should_report_type(iter_info, type))
345 0 : continue;
346 0 : mark = iter_info->marks[type];
347 0 : if (mark &&
348 0 : !(mark->flags & FSNOTIFY_MARK_FLAG_IGNORED_SURV_MODIFY))
349 0 : mark->ignored_mask = 0;
350 : }
351 : }
352 :
353 0 : fsnotify_foreach_iter_type(type) {
354 0 : if (!fsnotify_iter_should_report_type(iter_info, type))
355 0 : continue;
356 0 : mark = iter_info->marks[type];
357 : /* does the object mark tell us to do something? */
358 0 : if (mark) {
359 0 : group = mark->group;
360 0 : marks_mask |= mark->mask;
361 0 : marks_ignored_mask |= mark->ignored_mask;
362 : }
363 : }
364 :
365 : pr_debug("%s: group=%p mask=%x marks_mask=%x marks_ignored_mask=%x data=%p data_type=%d dir=%p cookie=%d\n",
366 : __func__, group, mask, marks_mask, marks_ignored_mask,
367 : data, data_type, dir, cookie);
368 :
369 0 : if (!(test_mask & marks_mask & ~marks_ignored_mask))
370 : return 0;
371 :
372 0 : if (group->ops->handle_event) {
373 0 : return group->ops->handle_event(group, mask, data, data_type, dir,
374 : file_name, cookie, iter_info);
375 : }
376 :
377 0 : return fsnotify_handle_event(group, mask, data, data_type, dir,
378 : file_name, cookie, iter_info);
379 : }
380 :
381 : static struct fsnotify_mark *fsnotify_first_mark(struct fsnotify_mark_connector **connp)
382 : {
383 : struct fsnotify_mark_connector *conn;
384 0 : struct hlist_node *node = NULL;
385 :
386 0 : conn = srcu_dereference(*connp, &fsnotify_mark_srcu);
387 0 : if (conn)
388 0 : node = srcu_dereference(conn->list.first, &fsnotify_mark_srcu);
389 :
390 0 : return hlist_entry_safe(node, struct fsnotify_mark, obj_list);
391 : }
392 :
393 : static struct fsnotify_mark *fsnotify_next_mark(struct fsnotify_mark *mark)
394 : {
395 0 : struct hlist_node *node = NULL;
396 :
397 0 : if (mark)
398 0 : node = srcu_dereference(mark->obj_list.next,
399 : &fsnotify_mark_srcu);
400 :
401 0 : return hlist_entry_safe(node, struct fsnotify_mark, obj_list);
402 : }
403 :
404 : /*
405 : * iter_info is a multi head priority queue of marks.
406 : * Pick a subset of marks from queue heads, all with the
407 : * same group and set the report_mask for selected subset.
408 : * Returns the report_mask of the selected subset.
409 : */
410 0 : static unsigned int fsnotify_iter_select_report_types(
411 : struct fsnotify_iter_info *iter_info)
412 : {
413 0 : struct fsnotify_group *max_prio_group = NULL;
414 : struct fsnotify_mark *mark;
415 : int type;
416 :
417 : /* Choose max prio group among groups of all queue heads */
418 0 : fsnotify_foreach_iter_type(type) {
419 0 : mark = iter_info->marks[type];
420 0 : if (mark &&
421 0 : fsnotify_compare_groups(max_prio_group, mark->group) > 0)
422 0 : max_prio_group = mark->group;
423 : }
424 :
425 0 : if (!max_prio_group)
426 : return 0;
427 :
428 : /* Set the report mask for marks from same group as max prio group */
429 0 : iter_info->report_mask = 0;
430 0 : fsnotify_foreach_iter_type(type) {
431 0 : mark = iter_info->marks[type];
432 0 : if (mark &&
433 0 : fsnotify_compare_groups(max_prio_group, mark->group) == 0)
434 0 : fsnotify_iter_set_report_type(iter_info, type);
435 : }
436 :
437 0 : return iter_info->report_mask;
438 : }
439 :
440 : /*
441 : * Pop from iter_info multi head queue, the marks that were iterated in the
442 : * current iteration step.
443 : */
444 : static void fsnotify_iter_next(struct fsnotify_iter_info *iter_info)
445 : {
446 : int type;
447 :
448 0 : fsnotify_foreach_iter_type(type) {
449 0 : if (fsnotify_iter_should_report_type(iter_info, type))
450 0 : iter_info->marks[type] =
451 0 : fsnotify_next_mark(iter_info->marks[type]);
452 : }
453 : }
454 :
455 : /*
456 : * fsnotify - This is the main call to fsnotify.
457 : *
458 : * The VFS calls into hook specific functions in linux/fsnotify.h.
459 : * Those functions then in turn call here. Here will call out to all of the
460 : * registered fsnotify_group. Those groups can then use the notification event
461 : * in whatever means they feel necessary.
462 : *
463 : * @mask: event type and flags
464 : * @data: object that event happened on
465 : * @data_type: type of object for fanotify_data_XXX() accessors
466 : * @dir: optional directory associated with event -
467 : * if @file_name is not NULL, this is the directory that
468 : * @file_name is relative to
469 : * @file_name: optional file name associated with event
470 : * @inode: optional inode associated with event -
471 : * If @dir and @inode are both non-NULL, event may be
472 : * reported to both.
473 : * @cookie: inotify rename cookie
474 : */
475 0 : int fsnotify(__u32 mask, const void *data, int data_type, struct inode *dir,
476 : const struct qstr *file_name, struct inode *inode, u32 cookie)
477 : {
478 0 : const struct path *path = fsnotify_data_path(data, data_type);
479 0 : struct super_block *sb = fsnotify_data_sb(data, data_type);
480 0 : struct fsnotify_iter_info iter_info = {};
481 0 : struct mount *mnt = NULL;
482 0 : struct inode *inode2 = NULL;
483 : struct dentry *moved;
484 : int inode2_type;
485 0 : int ret = 0;
486 : __u32 test_mask, marks_mask;
487 :
488 0 : if (path)
489 0 : mnt = real_mount(path->mnt);
490 :
491 0 : if (!inode) {
492 : /* Dirent event - report on TYPE_INODE to dir */
493 0 : inode = dir;
494 : /* For FS_RENAME, inode is old_dir and inode2 is new_dir */
495 0 : if (mask & FS_RENAME) {
496 0 : moved = fsnotify_data_dentry(data, data_type);
497 0 : inode2 = moved->d_parent->d_inode;
498 0 : inode2_type = FSNOTIFY_ITER_TYPE_INODE2;
499 : }
500 0 : } else if (mask & FS_EVENT_ON_CHILD) {
501 : /*
502 : * Event on child - report on TYPE_PARENT to dir if it is
503 : * watching children and on TYPE_INODE to child.
504 : */
505 0 : inode2 = dir;
506 0 : inode2_type = FSNOTIFY_ITER_TYPE_PARENT;
507 : }
508 :
509 : /*
510 : * Optimization: srcu_read_lock() has a memory barrier which can
511 : * be expensive. It protects walking the *_fsnotify_marks lists.
512 : * However, if we do not walk the lists, we do not have to do
513 : * SRCU because we have no references to any objects and do not
514 : * need SRCU to keep them "alive".
515 : */
516 0 : if (!sb->s_fsnotify_marks &&
517 0 : (!mnt || !mnt->mnt_fsnotify_marks) &&
518 0 : (!inode || !inode->i_fsnotify_marks) &&
519 0 : (!inode2 || !inode2->i_fsnotify_marks))
520 : return 0;
521 :
522 0 : marks_mask = sb->s_fsnotify_mask;
523 0 : if (mnt)
524 0 : marks_mask |= mnt->mnt_fsnotify_mask;
525 0 : if (inode)
526 0 : marks_mask |= inode->i_fsnotify_mask;
527 0 : if (inode2)
528 0 : marks_mask |= inode2->i_fsnotify_mask;
529 :
530 :
531 : /*
532 : * If this is a modify event we may need to clear some ignored masks.
533 : * In that case, the object with ignored masks will have the FS_MODIFY
534 : * event in its mask.
535 : * Otherwise, return if none of the marks care about this type of event.
536 : */
537 0 : test_mask = (mask & ALL_FSNOTIFY_EVENTS);
538 0 : if (!(test_mask & marks_mask))
539 : return 0;
540 :
541 0 : iter_info.srcu_idx = srcu_read_lock(&fsnotify_mark_srcu);
542 :
543 0 : iter_info.marks[FSNOTIFY_ITER_TYPE_SB] =
544 0 : fsnotify_first_mark(&sb->s_fsnotify_marks);
545 0 : if (mnt) {
546 0 : iter_info.marks[FSNOTIFY_ITER_TYPE_VFSMOUNT] =
547 0 : fsnotify_first_mark(&mnt->mnt_fsnotify_marks);
548 : }
549 0 : if (inode) {
550 0 : iter_info.marks[FSNOTIFY_ITER_TYPE_INODE] =
551 0 : fsnotify_first_mark(&inode->i_fsnotify_marks);
552 : }
553 0 : if (inode2) {
554 0 : iter_info.marks[inode2_type] =
555 0 : fsnotify_first_mark(&inode2->i_fsnotify_marks);
556 : }
557 :
558 : /*
559 : * We need to merge inode/vfsmount/sb mark lists so that e.g. inode mark
560 : * ignore masks are properly reflected for mount/sb mark notifications.
561 : * That's why this traversal is so complicated...
562 : */
563 0 : while (fsnotify_iter_select_report_types(&iter_info)) {
564 0 : ret = send_to_group(mask, data, data_type, dir, file_name,
565 : cookie, &iter_info);
566 :
567 0 : if (ret && (mask & ALL_FSNOTIFY_PERM_EVENTS))
568 : goto out;
569 :
570 : fsnotify_iter_next(&iter_info);
571 : }
572 : ret = 0;
573 : out:
574 0 : srcu_read_unlock(&fsnotify_mark_srcu, iter_info.srcu_idx);
575 :
576 0 : return ret;
577 : }
578 : EXPORT_SYMBOL_GPL(fsnotify);
579 :
580 1 : static __init int fsnotify_init(void)
581 : {
582 : int ret;
583 :
584 : BUILD_BUG_ON(HWEIGHT32(ALL_FSNOTIFY_BITS) != 25);
585 :
586 1 : ret = init_srcu_struct(&fsnotify_mark_srcu);
587 1 : if (ret)
588 0 : panic("initializing fsnotify_mark_srcu");
589 :
590 1 : fsnotify_mark_connector_cachep = KMEM_CACHE(fsnotify_mark_connector,
591 : SLAB_PANIC);
592 :
593 1 : return 0;
594 : }
595 : core_initcall(fsnotify_init);
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