Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
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
10struct 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
24struct mb_cache_op {
25 int (*free)(struct mb_cache_entry *, gfp_t);
26};
27
28/* Functions on caches */
29
30struct mb_cache * mb_cache_create(const char *, struct mb_cache_op *, size_t,
31 int, int);
32void mb_cache_shrink(struct block_device *);
33void mb_cache_destroy(struct mb_cache *);
34
35/* Functions on cache entries */
36
37struct mb_cache_entry *mb_cache_entry_alloc(struct mb_cache *, gfp_t);
38int mb_cache_entry_insert(struct mb_cache_entry *, struct block_device *,
39 sector_t, unsigned int[]);
40void mb_cache_entry_release(struct mb_cache_entry *);
41void mb_cache_entry_free(struct mb_cache_entry *);
42struct 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)
46struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache, int,
47 struct block_device *,
48 unsigned int);
49struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache_entry *, int,
50 struct block_device *,
51 unsigned int);
52#endif