release/src-rt-6.x.4708/linux/linux-2.6.36/include/linux/mbcache.h

   1 /*
   2   File: linux/mbcache.h
   3
   4   (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
   5 */
   6
   7 struct mb_cache_entry {
   8         struct list_head                e_lru_list;
   9         struct mb_cache                 *e_cache;
  10         unsigned short                  e_used;
  11         unsigned short                  e_queued;
  12         struct block_device             *e_bdev;
  13         sector_t                        e_block;
  14         struct list_head                e_block_list;
  15         struct {
  16                 struct list_head        o_list;
  17                 unsigned int            o_key;
  18         } e_index;
  19 };
  20
  21 /* Functions on caches */
  22
  23 struct mb_cache *mb_cache_create(const char *, int);
  24 void mb_cache_shrink(struct block_device *);
  25 void mb_cache_destroy(struct mb_cache *);
  26
  27 /* Functions on cache entries */
  28
  29 struct mb_cache_entry *mb_cache_entry_alloc(struct mb_cache *, gfp_t);
  30 int mb_cache_entry_insert(struct mb_cache_entry *, struct block_device *,
  31                           sector_t, unsigned int);
  32 void mb_cache_entry_release(struct mb_cache_entry *);
  33 void mb_cache_entry_free(struct mb_cache_entry *);
  34 struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *,
  35                                           struct block_device *,
  36                                           sector_t);
  37 struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache,
  38                                                  struct block_device *,
  39                                                  unsigned int);
  40 struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache_entry *,
  41                                                 struct block_device *,
  42                                                 unsigned int);