mirror of
https://github.com/torvalds/linux.git
synced 2024-11-06 03:51:48 +00:00
3241b1d3e0
The persistent-data library offers a re-usable framework for the storage and management of on-disk metadata in device-mapper targets. It's used by the thin-provisioning target in the next patch and in an upcoming hierarchical storage target. For further information, please read Documentation/device-mapper/persistent-data.txt Signed-off-by: Joe Thornber <thornber@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
34 lines
731 B
C
34 lines
731 B
C
/*
|
|
* 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 */
|