Block Cache

include/block/bcache.h

struct bcache_entry

Member Type	Member Name
uint8_t	*buffer
uint64_t	size
uint64_t	lba
uint64_t	access_time
struct mutex	lock
bool	dirty
bool	no_evict
struct bio_request	*request
refcount_t	refcount

struct bcache_wrapper

Member Type	Member Name
uint64_t	key
struct bcache_entry	*value
bool	occupied
struct bcache_wrapper	*next

struct bcache

Member Type	Member Name
struct bcache_wrapper	**entries
uint64_t	ticks
uint64_t	capacity
uint64_t	count
uint64_t	spb
struct spinlock	lock

• static inline uint64_t bcache_hash(uint64_t x,uint64_t capacity)
• void bcache_init(struct bcache *cache,uint64_t capacity)
• void * bcache_get(struct generic_disk *disk,uint64_t lba,uint64_t block_size,uint64_t spb,bool no_evict,struct bcache_entry **out_entry)
• bool bcache_writethrough(struct generic_disk *disk,struct bcache_entry *ent,uint64_t spb)
• void bcache_write_queue(struct generic_disk *disk,struct bcache_entry *ent,uint64_t spb,enum bio_request_priority prio)
• void bcache_stat(struct generic_disk *disk,uint64_t *total_dirty_out,uint64_t *total_present_out)
• bool bcache_insert(struct generic_disk *disk,uint64_t lba,struct bcache_entry *ent,uint64_t spb)
• bool bcache_evict(struct generic_disk *disk,uint64_t spb)
• enum errnobcache_prefetch_async(struct generic_disk *disk,uint64_t lba,uint64_t block_size,uint64_t spb)
• void * bcache_create_ent(struct generic_disk *disk,uint64_t lba,uint64_t block_size,uint64_t sectors_per_block,bool no_evict,struct bcache_entry **out_entry)
• static inline void bcache_increment_ticks(struct bcache *cache)
• static inline uint64_t bcache_get_ticks(struct bcache *cache)
• static inline void bcache_ent_lock(struct bcache_entry *ent)
• static inline void bcache_ent_unlock(struct bcache_entry *ent)
• static inline void bcache_ent_pin(struct bcache_entry *ent)
• static inline void bcache_ent_unpin(struct bcache_entry *ent)
• static inline void bcache_ent_acquire(struct bcache_entry *ent)
• static inline void bcache_ent_release(struct bcache_entry *ent)

Defines

• DEFAULT_BLOCK_CACHE_SIZE: 2048
• DEFAULT_MAX_DIRTY_ENTS: 64

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