diff options
Diffstat (limited to 'kernel/include/linux/mbcache.h')
| -rw-r--r-- | kernel/include/linux/mbcache.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/kernel/include/linux/mbcache.h b/kernel/include/linux/mbcache.h new file mode 100644 index 000000000..6a392e7a7 --- /dev/null +++ b/kernel/include/linux/mbcache.h @@ -0,0 +1,55 @@ +/* + 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; + atomic_t e_refcnt; + struct block_device *e_bdev; + sector_t e_block; + struct hlist_bl_node e_block_list; + struct { + struct hlist_bl_node o_list; + unsigned int o_key; + } e_index; + struct hlist_bl_head *e_block_hash_p; + struct hlist_bl_head *e_index_hash_p; +}; + +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 hlist_bl_head *c_block_hash; + struct hlist_bl_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); |