2005-04-16 16:20:36 -06:00
|
|
|
/*
|
|
|
|
|
File: linux/mbcache.h
|
|
|
|
|
|
|
|
|
|
(C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
/* Hardwire the number of additional indexes */
|
|
|
|
|
#define MB_CACHE_INDEXES_COUNT 1
|
|
|
|
|
|
|
|
|
|
struct mb_cache_entry {
|
|
|
|
|
struct list_head e_lru_list;
|
|
|
|
|
struct mb_cache *e_cache;
|
|
|
|
|
unsigned short e_used;
|
|
|
|
|
unsigned short e_queued;
|
|
|
|
|
struct block_device *e_bdev;
|
|
|
|
|
sector_t e_block;
|
|
|
|
|
struct list_head e_block_list;
|
|
|
|
|
struct {
|
|
|
|
|
struct list_head o_list;
|
|
|
|
|
unsigned int o_key;
|
|
|
|
|
} e_indexes[0];
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
struct mb_cache_op {
|
2005-10-21 01:20:48 -06:00
|
|
|
int (*free)(struct mb_cache_entry *, gfp_t);
|
2005-04-16 16:20:36 -06:00
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* Functions on caches */
|
|
|
|
|
|
|
|
|
|
struct mb_cache * mb_cache_create(const char *, struct mb_cache_op *, size_t,
|
|
|
|
|
int, int);
|
2005-07-27 12:45:15 -06:00
|
|
|
void mb_cache_shrink(struct block_device *);
|
2005-04-16 16:20:36 -06:00
|
|
|
void mb_cache_destroy(struct mb_cache *);
|
|
|
|
|
|
|
|
|
|
/* Functions on cache entries */
|
|
|
|
|
|
|
|
|
|
struct mb_cache_entry *mb_cache_entry_alloc(struct mb_cache *);
|
|
|
|
|
int mb_cache_entry_insert(struct mb_cache_entry *, struct block_device *,
|
|
|
|
|
sector_t, unsigned int[]);
|
|
|
|
|
void mb_cache_entry_release(struct mb_cache_entry *);
|
|
|
|
|
void mb_cache_entry_free(struct mb_cache_entry *);
|
|
|
|
|
struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *,
|
|
|
|
|
struct block_device *,
|
|
|
|
|
sector_t);
|
|
|
|
|
#if !defined(MB_CACHE_INDEXES_COUNT) || (MB_CACHE_INDEXES_COUNT > 0)
|
|
|
|
|
struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache, int,
|
|
|
|
|
struct block_device *,
|
|
|
|
|
unsigned int);
|
|
|
|
|
struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache_entry *, int,
|
|
|
|
|
struct block_device *,
|
|
|
|
|
unsigned int);
|
|
|
|
|
#endif
|
