1 #ifndef _LINUX_MB2CACHE_H
2 #define _LINUX_MB2CACHE_H
4 #include <linux/hash.h>
5 #include <linux/list_bl.h>
6 #include <linux/list.h>
7 #include <linux/atomic.h>
12 struct mb2_cache_entry {
13 /* List of entries in cache - protected by cache->c_list_lock */
14 struct list_head e_list;
15 /* Hash table list - protected by bitlock in e_hash_list_head */
16 struct hlist_bl_node e_hash_list;
18 /* Key in hash - stable during lifetime of the entry */
20 /* Block number of hashed block - stable during lifetime of the entry */
23 * Head of hash list (for list bit lock) - stable. Combined with
24 * referenced bit of entry
26 unsigned long _e_hash_list_head;
29 struct mb2_cache *mb2_cache_create(int bucket_bits);
30 void mb2_cache_destroy(struct mb2_cache *cache);
32 int mb2_cache_entry_create(struct mb2_cache *cache, gfp_t mask, u32 key,
34 void __mb2_cache_entry_free(struct mb2_cache_entry *entry);
35 static inline int mb2_cache_entry_put(struct mb2_cache *cache,
36 struct mb2_cache_entry *entry)
38 if (!atomic_dec_and_test(&entry->e_refcnt))
40 __mb2_cache_entry_free(entry);
44 void mb2_cache_entry_delete_block(struct mb2_cache *cache, u32 key,
46 struct mb2_cache_entry *mb2_cache_entry_find_first(struct mb2_cache *cache,
48 struct mb2_cache_entry *mb2_cache_entry_find_next(struct mb2_cache *cache,
49 struct mb2_cache_entry *entry);
50 void mb2_cache_entry_touch(struct mb2_cache *cache,
51 struct mb2_cache_entry *entry);
53 #endif /* _LINUX_MB2CACHE_H */