[deliverable/linux.git] / drivers / md / persistent-data / dm-space-map-metadata.h

/*
 * Copyright (C) 2011 Red Hat, Inc.
 *
 * This file is released under the GPL.
 */

#ifndef DM_SPACE_MAP_METADATA_H
#define DM_SPACE_MAP_METADATA_H

#include "dm-transaction-manager.h"

/*
 * Unfortunately we have to use two-phase construction due to the cycle
 * between the tm and sm.
 */
struct dm_space_map *dm_sm_metadata_init(void);

/*
 * Create a fresh space map.
 */
int dm_sm_metadata_create(struct dm_space_map *sm,
			  struct dm_transaction_manager *tm,
			  dm_block_t nr_blocks,
			  dm_block_t superblock);

/*
 * Open from a previously-recorded root.
 */
int dm_sm_metadata_open(struct dm_space_map *sm,
			struct dm_transaction_manager *tm,
			void *root_le, size_t len);

#endif	/* DM_SPACE_MAP_METADATA_H */
Commit	Line	Data
3241b1d3 JT	1	/*
	2	* Copyright (C) 2011 Red Hat, Inc.
	3	*
	4	* This file is released under the GPL.
	5	*/
	6
	7	#ifndef DM_SPACE_MAP_METADATA_H
	8	#define DM_SPACE_MAP_METADATA_H
	9
	10	#include "dm-transaction-manager.h"
	11
	12	/*
	13	* Unfortunately we have to use two-phase construction due to the cycle
	14	* between the tm and sm.
	15	*/
	16	struct dm_space_map *dm_sm_metadata_init(void);
	17
	18	/*
	19	* Create a fresh space map.
	20	*/
	21	int dm_sm_metadata_create(struct dm_space_map *sm,
	22	struct dm_transaction_manager *tm,
	23	dm_block_t nr_blocks,
	24	dm_block_t superblock);
	25
	26	/*
	27	* Open from a previously-recorded root.
	28	*/
	29	int dm_sm_metadata_open(struct dm_space_map *sm,
	30	struct dm_transaction_manager *tm,
	31	void *root_le, size_t len);
	32
	33	#endif /* DM_SPACE_MAP_METADATA_H */