1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2012 Red Hat, Inc.
4 *
5 * This file is released under the GPL.
6 */
7
8#ifndef DM_CACHE_BLOCK_TYPES_H
9#define DM_CACHE_BLOCK_TYPES_H
10
11#include "persistent-data/dm-block-manager.h"
12
13/*----------------------------------------------------------------*/
14
15/*
16 * It's helpful to get sparse to differentiate between indexes into the
17 * origin device, indexes into the cache device, and indexes into the
18 * discard bitset.
19 */
20
21typedef dm_block_t __bitwise dm_oblock_t;
22typedef uint32_t __bitwise dm_cblock_t;
23typedef dm_block_t __bitwise dm_dblock_t;
24
25static inline dm_oblock_t to_oblock(dm_block_t b)
26{
27 return (__force dm_oblock_t) b;
28}
29
30static inline dm_block_t from_oblock(dm_oblock_t b)
31{
32 return (__force dm_block_t) b;
33}
34
35static inline dm_cblock_t to_cblock(uint32_t b)
36{
37 return (__force dm_cblock_t) b;
38}
39
40static inline uint32_t from_cblock(dm_cblock_t b)
41{
42 return (__force uint32_t) b;
43}
44
45static inline dm_dblock_t to_dblock(dm_block_t b)
46{
47 return (__force dm_dblock_t) b;
48}
49
50static inline dm_block_t from_dblock(dm_dblock_t b)
51{
52 return (__force dm_block_t) b;
53}
54
55#endif /* DM_CACHE_BLOCK_TYPES_H */
56

source code of linux/drivers/md/dm-cache-block-types.h