dm: add persistent data library
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / md / persistent-data / dm-space-map-disk.h
1 /*
2 * Copyright (C) 2011 Red Hat, Inc.
3 *
4 * This file is released under the GPL.
5 */
6
7 #ifndef _LINUX_DM_SPACE_MAP_DISK_H
8 #define _LINUX_DM_SPACE_MAP_DISK_H
9
10 #include "dm-block-manager.h"
11
12 struct dm_space_map;
13 struct dm_transaction_manager;
14
15 /*
16 * Unfortunately we have to use two-phase construction due to the cycle
17 * between the tm and sm.
18 */
19 struct dm_space_map *dm_sm_disk_create(struct dm_transaction_manager *tm,
20 dm_block_t nr_blocks);
21
22 struct dm_space_map *dm_sm_disk_open(struct dm_transaction_manager *tm,
23 void *root, size_t len);
24
25 #endif /* _LINUX_DM_SPACE_MAP_DISK_H */