Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | File: linux/mbcache.h | |
3 | ||
4 | (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org> | |
5 | */ | |
6 | ||
7 | /* Hardwire the number of additional indexes */ | |
8 | #define MB_CACHE_INDEXES_COUNT 1 | |
9 | ||
10 | struct mb_cache_entry { | |
11 | struct list_head e_lru_list; | |
12 | struct mb_cache *e_cache; | |
13 | unsigned short e_used; | |
14 | unsigned short e_queued; | |
15 | struct block_device *e_bdev; | |
16 | sector_t e_block; | |
17 | struct list_head e_block_list; | |
18 | struct { | |
19 | struct list_head o_list; | |
20 | unsigned int o_key; | |
21 | } e_indexes[0]; | |
22 | }; | |
23 | ||
24 | struct mb_cache_op { | |
27496a8c | 25 | int (*free)(struct mb_cache_entry *, gfp_t); |
1da177e4 LT |
26 | }; |
27 | ||
28 | /* Functions on caches */ | |
29 | ||
30 | struct mb_cache * mb_cache_create(const char *, struct mb_cache_op *, size_t, | |
31 | int, int); | |
8c52ab42 | 32 | void mb_cache_shrink(struct block_device *); |
1da177e4 LT |
33 | void mb_cache_destroy(struct mb_cache *); |
34 | ||
35 | /* Functions on cache entries */ | |
36 | ||
335e92e8 | 37 | struct mb_cache_entry *mb_cache_entry_alloc(struct mb_cache *, gfp_t); |
1da177e4 LT |
38 | int mb_cache_entry_insert(struct mb_cache_entry *, struct block_device *, |
39 | sector_t, unsigned int[]); | |
40 | void mb_cache_entry_release(struct mb_cache_entry *); | |
41 | void mb_cache_entry_free(struct mb_cache_entry *); | |
42 | struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *, | |
43 | struct block_device *, | |
44 | sector_t); | |
45 | #if !defined(MB_CACHE_INDEXES_COUNT) || (MB_CACHE_INDEXES_COUNT > 0) | |
46 | struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache, int, | |
47 | struct block_device *, | |
48 | unsigned int); | |
49 | struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache_entry *, int, | |
50 | struct block_device *, | |
51 | unsigned int); | |
52 | #endif |