#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_ */
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