fs/notify/fsnotify.h

   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
  12 struct fsnotify_iter_info {
  13         struct fsnotify_mark *inode_mark;
  14         struct fsnotify_mark *vfsmount_mark;
  15         int srcu_idx;
  16 };
  17
  18 /* destroy all events sitting in this groups notification queue */
  19 extern void fsnotify_flush_notify(struct fsnotify_group *group);
  20
  21 /* protects reads of inode and vfsmount marks list */
  22 extern struct srcu_struct fsnotify_mark_srcu;
  23
  24 /* compare two groups for sorting of marks lists */
  25 extern int fsnotify_compare_groups(struct fsnotify_group *a,
  26                                    struct fsnotify_group *b);
  27
  28 /* Destroy all marks connected via given connector */
  29 extern void fsnotify_destroy_marks(struct fsnotify_mark_connector __rcu **connp);
  30 /* run the list of all marks associated with inode and destroy them */
  31 static inline void fsnotify_clear_marks_by_inode(struct inode *inode)
  32 {
  33         fsnotify_destroy_marks(&inode->i_fsnotify_marks);
  34 }
  35 /* run the list of all marks associated with vfsmount and destroy them */
  36 static inline void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
  37 {
  38         fsnotify_destroy_marks(&real_mount(mnt)->mnt_fsnotify_marks);
  39 }
  40 /* Wait until all marks queued for destruction are destroyed */
  41 extern void fsnotify_wait_marks_destroyed(void);
  42
  43 /*
  44  * update the dentry->d_flags of all of inode's children to indicate if inode cares
  45  * about events that happen to its children.
  46  */
  47 extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
  48
  49 /* allocate and destroy and event holder to attach events to notification/access queues */
  50 extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
  51 extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
  52
  53 #endif  /* __FS_NOTIFY_FSNOTIFY_H_ */