mbcache.h revision 2aec7c523291621ebb68ba8e0bd9b52a26bb76ee 
1/*
2  File: linux/mbcache.h
3
4  (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
5*/
6
7struct 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
23struct mb_cache *mb_cache_create(const char *, int);
24void mb_cache_shrink(struct block_device *);
25void mb_cache_destroy(struct mb_cache *);
26
27/* Functions on cache entries */
28
29struct mb_cache_entry *mb_cache_entry_alloc(struct mb_cache *, gfp_t);
30int mb_cache_entry_insert(struct mb_cache_entry *, struct block_device *,
31			  sector_t, unsigned int);
32void mb_cache_entry_release(struct mb_cache_entry *);
33void mb_cache_entry_free(struct mb_cache_entry *);
34struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *,
35					  struct block_device *,
36					  sector_t);
37struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache,
38						 struct block_device *,
39						 unsigned int);
40struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache_entry *,
41						struct block_device *,
42						unsigned int);
43