/* File: linux/mbcache.h (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org> */ /* Hardwire the number of additional indexes */ #define MB_CACHE_INDEXES_COUNT 1 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_indexes[0]; }; struct mb_cache_op { int (*free)(struct mb_cache_entry *, gfp_t); }; /* Functions on caches */ struct mb_cache * mb_cache_create(const char *, struct mb_cache_op *, size_t, int, 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 *); 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); #if !defined(MB_CACHE_INDEXES_COUNT) || (MB_CACHE_INDEXES_COUNT > 0) struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache, int, struct block_device *, unsigned int); struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache_entry *, int, struct block_device *, unsigned int); #endif