mirror of https://gitee.com/openkylin/linux.git
44 lines
907 B
C
44 lines
907 B
C
/*
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* Copyright (C) 2012 Red Hat, Inc.
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*
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* This file is released under the GPL.
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*/
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#ifndef DM_CACHE_BLOCK_TYPES_H
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#define DM_CACHE_BLOCK_TYPES_H
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#include "persistent-data/dm-block-manager.h"
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/*----------------------------------------------------------------*/
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/*
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* It's helpful to get sparse to differentiate between indexes into the
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* origin device, indexes into the cache device, and indexes into the
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* discard bitset.
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*/
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typedef dm_block_t __bitwise__ dm_oblock_t;
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typedef uint32_t __bitwise__ dm_cblock_t;
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static inline dm_oblock_t to_oblock(dm_block_t b)
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{
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return (__force dm_oblock_t) b;
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}
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static inline dm_block_t from_oblock(dm_oblock_t b)
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{
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return (__force dm_block_t) b;
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}
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static inline dm_cblock_t to_cblock(uint32_t b)
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{
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return (__force dm_cblock_t) b;
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}
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static inline uint32_t from_cblock(dm_cblock_t b)
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{
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return (__force uint32_t) b;
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}
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#endif /* DM_CACHE_BLOCK_TYPES_H */
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