#ifndef __FS_NOTIFY_FSNOTIFY_H_
  #define __FS_NOTIFY_FSNOTIFY_H_
  
  #include <linux/list.h>
  #include <linux/fsnotify.h>
  #include <linux/srcu.h>
  #include <linux/types.h>

  #include "../mount.h"

  /* destroy all events sitting in this groups notification queue */
  extern void fsnotify_flush_notify(struct fsnotify_group *group);

  /* protects reads of inode and vfsmount marks list */
  extern struct srcu_struct fsnotify_mark_srcu;

  /* Calculate mask of events for a list of marks */
  extern u32 fsnotify_recalc_mask(struct hlist_head *head);

  /* compare two groups for sorting of marks lists */
  extern int fsnotify_compare_groups(struct fsnotify_group *a,
  				   struct fsnotify_group *b);

  extern void fsnotify_set_inode_mark_mask_locked(struct fsnotify_mark *fsn_mark,
  						__u32 mask);

  /* Add mark to a proper place in mark list */
  extern int fsnotify_add_mark_list(struct hlist_head *head,
  				  struct fsnotify_mark *mark,
  				  int allow_dups);

  /* add a mark to an inode */
  extern int fsnotify_add_inode_mark(struct fsnotify_mark *mark,
  				   struct fsnotify_group *group, struct inode *inode,
  				   int allow_dups);

  /* add a mark to a vfsmount */
  extern int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark,
  				      struct fsnotify_group *group, struct vfsmount *mnt,
  				      int allow_dups);

  /* vfsmount specific destruction of a mark */
  extern void fsnotify_destroy_vfsmount_mark(struct fsnotify_mark *mark);

  /* inode specific destruction of a mark */
  extern void fsnotify_destroy_inode_mark(struct fsnotify_mark *mark);

  /* Find mark belonging to given group in the list of marks */
  extern struct fsnotify_mark *fsnotify_find_mark(struct hlist_head *head,
  						struct fsnotify_group *group);

  /* Destroy all marks in the given list protected by 'lock' */
  extern void fsnotify_destroy_marks(struct hlist_head *head, spinlock_t *lock);
  /* run the list of all marks associated with inode and destroy them */
  static inline void fsnotify_clear_marks_by_inode(struct inode *inode)
  {
  	fsnotify_destroy_marks(&inode->i_fsnotify_marks, &inode->i_lock);
  }
  /* run the list of all marks associated with vfsmount and destroy them */
  static inline void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
  {
  	fsnotify_destroy_marks(&real_mount(mnt)->mnt_fsnotify_marks,
  			       &mnt->mnt_root->d_lock);
  }

  /* prepare for freeing all marks associated with given group */
  extern void fsnotify_detach_group_marks(struct fsnotify_group *group);
  /*
   * wait for fsnotify_mark_srcu period to end and free all marks in destroy_list
   */
  extern void fsnotify_mark_destroy_list(void);

  /*
   * update the dentry->d_flags of all of inode's children to indicate if inode cares
   * about events that happen to its children.
   */
  extern void __fsnotify_update_child_dentry_flags(struct inode *inode);

  
  /* allocate and destroy and event holder to attach events to notification/access queues */
  extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
  extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);

  #endif	/* __FS_NOTIFY_FSNOTIFY_H_ */