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