[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / mbcache.h

/*
  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);
Commit	Line	Data
1da177e4 LT	1	/*
	2	File: linux/mbcache.h
	3
	4	(C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org>
	5	*/
	6
1da177e4 LT	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;
2aec7c52	18	} e_index;
1da177e4 LT	19	};
1da177e4 LT	20
d96336b0 JH	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
1da177e4 LT	32	/* Functions on caches */
1da177e4 LT	33
2aec7c52	34	struct mb_cache mb_cache_create(const char , int);
8c52ab42	35	void mb_cache_shrink(struct block_device *);
1da177e4 LT	36	void mb_cache_destroy(struct mb_cache *);
	37
	38	/* Functions on cache entries */
	39
335e92e8	40	struct mb_cache_entry mb_cache_entry_alloc(struct mb_cache , gfp_t);
1da177e4	41	int mb_cache_entry_insert(struct mb_cache_entry , struct block_device ,
2aec7c52	42	sector_t, unsigned int);
1da177e4 LT	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);
2aec7c52	48	struct mb_cache_entry mb_cache_entry_find_first(struct mb_cache cache,
1da177e4 LT	49	struct block_device *,
1da177e4 LT	50	unsigned int);
2aec7c52	51	struct mb_cache_entry mb_cache_entry_find_next(struct mb_cache_entry ,
1da177e4 LT	52	struct block_device *,
1da177e4 LT	53	unsigned int);