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

/* SPDX-License-Identifier: GPL-2.0 */
#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"

static inline struct inode *fsnotify_conn_inode(
				struct fsnotify_mark_connector *conn)
{
	return container_of(conn->obj, struct inode, i_fsnotify_marks);
}

static inline struct mount *fsnotify_conn_mount(
				struct fsnotify_mark_connector *conn)
{
	return container_of(conn->obj, struct mount, mnt_fsnotify_marks);
}

static inline struct super_block *fsnotify_conn_sb(
				struct fsnotify_mark_connector *conn)
{
	return container_of(conn->obj, struct super_block, s_fsnotify_marks);
}

static inline struct super_block *fsnotify_object_sb(void *obj,
			enum fsnotify_obj_type obj_type)
{
	switch (obj_type) {
	case FSNOTIFY_OBJ_TYPE_INODE:
		return ((struct inode *)obj)->i_sb;
	case FSNOTIFY_OBJ_TYPE_VFSMOUNT:
		return ((struct vfsmount *)obj)->mnt_sb;
	case FSNOTIFY_OBJ_TYPE_SB:
		return (struct super_block *)obj;
	default:
		return NULL;
	}
}

static inline struct super_block *fsnotify_connector_sb(
				struct fsnotify_mark_connector *conn)
{
	switch (conn->type) {
	case FSNOTIFY_OBJ_TYPE_INODE:
		return fsnotify_conn_inode(conn)->i_sb;
	case FSNOTIFY_OBJ_TYPE_VFSMOUNT:
		return fsnotify_conn_mount(conn)->mnt.mnt_sb;
	case FSNOTIFY_OBJ_TYPE_SB:
		return fsnotify_conn_sb(conn);
	default:
		return NULL;
	}
}

/* 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;

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

/* Destroy all marks attached to an object via connector */
extern void fsnotify_destroy_marks(fsnotify_connp_t *connp);
/* 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);
}
/* 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);
}
/* run the list of all marks associated with sb and destroy them */
static inline void fsnotify_clear_marks_by_sb(struct super_block *sb)
{
	fsnotify_destroy_marks(&sb->s_fsnotify_marks);
}

/*
 * 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);

extern struct kmem_cache *fsnotify_mark_connector_cachep;

#endif	/* __FS_NOTIFY_FSNOTIFY_H_ */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
90586523 EP	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
925d1132 JK	10	#include "../mount.h"
925d1132 JK	11
36f10f55 AG	12	static inline struct inode *fsnotify_conn_inode(
36f10f55 AG	13	struct fsnotify_mark_connector *conn)
b812a9f5	14	{
36f10f55	15	return container_of(conn->obj, struct inode, i_fsnotify_marks);
b812a9f5 AG	16	}
b812a9f5 AG	17
36f10f55 AG	18	static inline struct mount *fsnotify_conn_mount(
36f10f55 AG	19	struct fsnotify_mark_connector *conn)
b812a9f5	20	{
36f10f55	21	return container_of(conn->obj, struct mount, mnt_fsnotify_marks);
b812a9f5 AG	22	}
b812a9f5 AG	23
1e6cb723 AG	24	static inline struct super_block *fsnotify_conn_sb(
	25	struct fsnotify_mark_connector *conn)
	26	{
	27	return container_of(conn->obj, struct super_block, s_fsnotify_marks);
	28	}
	29
f115815d AG	30	static inline struct super_block fsnotify_object_sb(void obj,
	31	enum fsnotify_obj_type obj_type)
	32	{
	33	switch (obj_type) {
	34	case FSNOTIFY_OBJ_TYPE_INODE:
	35	return ((struct inode *)obj)->i_sb;
	36	case FSNOTIFY_OBJ_TYPE_VFSMOUNT:
	37	return ((struct vfsmount *)obj)->mnt_sb;
	38	case FSNOTIFY_OBJ_TYPE_SB:
	39	return (struct super_block *)obj;
	40	default:
	41	return NULL;
	42	}
	43	}
	44
ec44610f AG	45	static inline struct super_block *fsnotify_connector_sb(
	46	struct fsnotify_mark_connector *conn)
	47	{
	48	switch (conn->type) {
	49	case FSNOTIFY_OBJ_TYPE_INODE:
	50	return fsnotify_conn_inode(conn)->i_sb;
	51	case FSNOTIFY_OBJ_TYPE_VFSMOUNT:
	52	return fsnotify_conn_mount(conn)->mnt.mnt_sb;
	53	case FSNOTIFY_OBJ_TYPE_SB:
	54	return fsnotify_conn_sb(conn);
	55	default:
	56	return NULL;
	57	}
	58	}
	59
a2d8bc6c EP	60	/* destroy all events sitting in this groups notification queue */
	61	extern void fsnotify_flush_notify(struct fsnotify_group *group);
	62
75c1be48 EP	63	/* protects reads of inode and vfsmount marks list */
	64	extern struct srcu_struct fsnotify_mark_srcu;
	65
8edc6e16 JK	66	/* compare two groups for sorting of marks lists */
	67	extern int fsnotify_compare_groups(struct fsnotify_group *a,
	68	struct fsnotify_group *b);
	69
9b6e5434 AG	70	/* Destroy all marks attached to an object via connector */
9b6e5434 AG	71	extern void fsnotify_destroy_marks(fsnotify_connp_t *connp);
925d1132 JK	72	/* run the list of all marks associated with inode and destroy them */
	73	static inline void fsnotify_clear_marks_by_inode(struct inode *inode)
	74	{
08991e83	75	fsnotify_destroy_marks(&inode->i_fsnotify_marks);
925d1132 JK	76	}
	77	/* run the list of all marks associated with vfsmount and destroy them */
	78	static inline void fsnotify_clear_marks_by_mount(struct vfsmount *mnt)
	79	{
08991e83	80	fsnotify_destroy_marks(&real_mount(mnt)->mnt_fsnotify_marks);
925d1132	81	}
1e6cb723 AG	82	/* run the list of all marks associated with sb and destroy them */
	83	static inline void fsnotify_clear_marks_by_sb(struct super_block *sb)
	84	{
	85	fsnotify_destroy_marks(&sb->s_fsnotify_marks);
	86	}
35e48176	87
c28f7e56 EP	88	/*
	89	* update the dentry->d_flags of all of inode's children to indicate if inode cares
	90	* about events that happen to its children.
	91	*/
	92	extern void __fsnotify_update_child_dentry_flags(struct inode *inode);
a2d8bc6c	93
4a0b20be BD	94	extern struct kmem_cache *fsnotify_mark_connector_cachep;
4a0b20be BD	95
90586523	96	#endif /* __FS_NOTIFY_FSNOTIFY_H_ */