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 
21 typedef dm_block_t __bitwise dm_oblock_t;
22 typedef uint32_t __bitwise dm_cblock_t;
23 typedef dm_block_t __bitwise dm_dblock_t;
24 
to_oblock(dm_block_t b)25 static inline dm_oblock_t to_oblock(dm_block_t b)
26 {
27 	return (__force dm_oblock_t) b;
28 }
29 
from_oblock(dm_oblock_t b)30 static inline dm_block_t from_oblock(dm_oblock_t b)
31 {
32 	return (__force dm_block_t) b;
33 }
34 
to_cblock(uint32_t b)35 static inline dm_cblock_t to_cblock(uint32_t b)
36 {
37 	return (__force dm_cblock_t) b;
38 }
39 
from_cblock(dm_cblock_t b)40 static inline uint32_t from_cblock(dm_cblock_t b)
41 {
42 	return (__force uint32_t) b;
43 }
44 
to_dblock(dm_block_t b)45 static inline dm_dblock_t to_dblock(dm_block_t b)
46 {
47 	return (__force dm_dblock_t) b;
48 }
49 
from_dblock(dm_dblock_t b)50 static 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