/*
   * Copyright (C) 2012 Red Hat, Inc.
   *
   * This file is released under the GPL.
   */
  
  #ifndef DM_CACHE_BLOCK_TYPES_H
  #define DM_CACHE_BLOCK_TYPES_H
  
  #include "persistent-data/dm-block-manager.h"
  
  /*----------------------------------------------------------------*/
  
  /*
   * It's helpful to get sparse to differentiate between indexes into the
   * origin device, indexes into the cache device, and indexes into the
   * discard bitset.
   */
  
  typedef dm_block_t __bitwise dm_oblock_t;
  typedef uint32_t __bitwise dm_cblock_t;
  typedef dm_block_t __bitwise dm_dblock_t;
  
  static inline dm_oblock_t to_oblock(dm_block_t b)
  {
  	return (__force dm_oblock_t) b;
  }
  
  static inline dm_block_t from_oblock(dm_oblock_t b)
  {
  	return (__force dm_block_t) b;
  }
  
  static inline dm_cblock_t to_cblock(uint32_t b)
  {
  	return (__force dm_cblock_t) b;
  }
  
  static inline uint32_t from_cblock(dm_cblock_t b)
  {
  	return (__force uint32_t) b;
  }
  
  static inline dm_dblock_t to_dblock(dm_block_t b)
  {
  	return (__force dm_dblock_t) b;
  }
  
  static inline dm_block_t from_dblock(dm_dblock_t b)
  {
  	return (__force dm_block_t) b;
  }
  
  #endif /* DM_CACHE_BLOCK_TYPES_H */