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/*
File: linux/mbcache.h
(C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
*/
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_index;
};
struct mb_cache {
struct list_head c_cache_list;
const char *c_name;
atomic_t c_entry_count;
int c_max_entries;
int c_bucket_bits;
struct kmem_cache *c_entry_cache;
struct list_head *c_block_hash;
struct list_head *c_index_hash;
};
/* Functions on caches */
struct mb_cache *mb_cache_create(const char *, int);
void mb_cache_shrink(struct block_device *);
void mb_cache_destroy(struct mb_cache *);
/* Functions on cache entries */
struct mb_cache_entry *mb_cache_entry_alloc(struct mb_cache *, gfp_t);
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);
struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache,
struct block_device *,
unsigned int);
struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache_entry *,
struct block_device *,
unsigned int);