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#ifndef _LINUX_MB2CACHE_H
#define _LINUX_MB2CACHE_H
#include <linux/hash.h>
#include <linux/list_bl.h>
#include <linux/list.h>
#include <linux/atomic.h>
#include <linux/fs.h>
struct mb2_cache;
struct mb2_cache_entry {
/* LRU list - protected by cache->c_lru_list_lock */
struct list_head e_lru_list;
/* Hash table list - protected by bitlock in e_hash_list_head */
struct hlist_bl_node e_hash_list;
atomic_t e_refcnt;
/* Key in hash - stable during lifetime of the entry */
u32 e_key;
/* Block number of hashed block - stable during lifetime of the entry */
sector_t e_block;
/* Head of hash list (for list bit lock) - stable */
struct hlist_bl_head *e_hash_list_head;
};
struct mb2_cache *mb2_cache_create(int bucket_bits);
void mb2_cache_destroy(struct mb2_cache *cache);
int mb2_cache_entry_create(struct mb2_cache *cache, gfp_t mask, u32 key,
sector_t block);
void __mb2_cache_entry_free(struct mb2_cache_entry *entry);
static inline int mb2_cache_entry_put(struct mb2_cache *cache,
struct mb2_cache_entry *entry)
{
if (!atomic_dec_and_test(&entry->e_refcnt))
return 0;
__mb2_cache_entry_free(entry);
return 1;
}
void mb2_cache_entry_delete_block(struct mb2_cache *cache, u32 key,
sector_t block);
struct mb2_cache_entry *mb2_cache_entry_find_first(struct mb2_cache *cache,
u32 key);
struct mb2_cache_entry *mb2_cache_entry_find_next(struct mb2_cache *cache,
struct mb2_cache_entry *entry);
void mb2_cache_entry_touch(struct mb2_cache *cache,
struct mb2_cache_entry *entry);
#endif /* _LINUX_MB2CACHE_H */
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