[linux-2.6-block.git] / fs / notify / fsnotify.h

#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);
}
/*
 * 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_ */
Commit	Line	Data
90586523 EP	1	#ifndef __FS_NOTIFY_FSNOTIFY_H_
	2	#define __FS_NOTIFY_FSNOTIFY_H_
	3
	4	#include <linux/list.h>
	5	#include <linux/fsnotify.h>
	6	#include <linux/srcu.h>
	7	#include <linux/types.h>
	8
925d1132 JK	9	#include "../mount.h"
925d1132 JK	10
a2d8bc6c EP	11	/* destroy all events sitting in this groups notification queue */
	12	extern void fsnotify_flush_notify(struct fsnotify_group *group);
	13
75c1be48 EP	14	/* protects reads of inode and vfsmount marks list */
	15	extern struct srcu_struct fsnotify_mark_srcu;
	16
0809ab69 JK	17	/* Calculate mask of events for a list of marks */
	18	extern u32 fsnotify_recalc_mask(struct hlist_head *head);
	19
8edc6e16 JK	20	/* compare two groups for sorting of marks lists */
	21	extern int fsnotify_compare_groups(struct fsnotify_group *a,
	22	struct fsnotify_group *b);
	23
90b1e7a5 EP	24	extern void fsnotify_set_inode_mark_mask_locked(struct fsnotify_mark *fsn_mark,
90b1e7a5 EP	25	__u32 mask);
0809ab69 JK	26	/* Add mark to a proper place in mark list */
	27	extern int fsnotify_add_mark_list(struct hlist_head *head,
	28	struct fsnotify_mark *mark,
	29	int allow_dups);
5444e298 EP	30	/* add a mark to an inode */
	31	extern int fsnotify_add_inode_mark(struct fsnotify_mark *mark,
	32	struct fsnotify_group group, struct inode inode,
	33	int allow_dups);
0d48b7f0 EP	34	/* add a mark to a vfsmount */
	35	extern int fsnotify_add_vfsmount_mark(struct fsnotify_mark *mark,
	36	struct fsnotify_group group, struct vfsmount mnt,
	37	int allow_dups);
5444e298	38
0d48b7f0 EP	39	/* vfsmount specific destruction of a mark */
0d48b7f0 EP	40	extern void fsnotify_destroy_vfsmount_mark(struct fsnotify_mark *mark);
5444e298 EP	41	/* inode specific destruction of a mark */
5444e298 EP	42	extern void fsnotify_destroy_inode_mark(struct fsnotify_mark *mark);
0809ab69 JK	43	/* Find mark belonging to given group in the list of marks */
	44	extern struct fsnotify_mark fsnotify_find_mark(struct hlist_head head,
	45	struct fsnotify_group *group);
925d1132 JK	46	/* Destroy all marks in the given list protected by 'lock' */
	47	extern void fsnotify_destroy_marks(struct hlist_head head, spinlock_t lock);
	48	/* run the list of all marks associated with inode and destroy them */
	49	static inline void fsnotify_clear_marks_by_inode(struct inode *inode)
	50	{
	51	fsnotify_destroy_marks(&inode->i_fsnotify_marks, &inode->i_lock);
	52	}
	53	/* run the list of all marks associated with vfsmount and destroy them */
	54	static inline void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
	55	{
	56	fsnotify_destroy_marks(&real_mount(mnt)->mnt_fsnotify_marks,
	57	&mnt->mnt_root->d_lock);
	58	}
c28f7e56 EP	59	/*
	60	* update the dentry->d_flags of all of inode's children to indicate if inode cares
	61	* about events that happen to its children.
	62	*/
	63	extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
a2d8bc6c EP	64
	65	/* allocate and destroy and event holder to attach events to notification/access queues */
	66	extern struct fsnotify_event_holder *fsnotify_alloc_event_holder(void);
	67	extern void fsnotify_destroy_event_holder(struct fsnotify_event_holder *holder);
	68
90586523	69	#endif /* __FS_NOTIFY_FSNOTIFY_H_ */