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block: remove per-queue plugging
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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 struct mb_cache {
22 struct list_head c_cache_list;
23 const char *c_name;
24 atomic_t c_entry_count;
25 int c_max_entries;
26 int c_bucket_bits;
27 struct kmem_cache *c_entry_cache;
28 struct list_head *c_block_hash;
29 struct list_head *c_index_hash;
30 };
31
32 /* Functions on caches */
33
34 struct mb_cache *mb_cache_create(const char *, int);
35 void mb_cache_shrink(struct block_device *);
36 void mb_cache_destroy(struct mb_cache *);
37
38 /* Functions on cache entries */
39
40 struct mb_cache_entry *mb_cache_entry_alloc(struct mb_cache *, gfp_t);
41 int mb_cache_entry_insert(struct mb_cache_entry *, struct block_device *,
42 sector_t, unsigned int);
43 void mb_cache_entry_release(struct mb_cache_entry *);
44 void mb_cache_entry_free(struct mb_cache_entry *);
45 struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *,
46 struct block_device *,
47 sector_t);
48 struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache,
49 struct block_device *,
50 unsigned int);
51 struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache_entry *,
52 struct block_device *,
53 unsigned int);