Rev 422 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | /* |
| 2 | File: linux/mbcache.h |
||
| 3 | |||
| 4 | (C) 2001 by Andreas Gruenbacher, <a.gruenbacher@computer.org> |
||
| 5 | */ |
||
| 6 | |||
| 7 | /* Hardwire the number of additional indexes */ |
||
| 8 | #define MB_CACHE_INDEXES_COUNT 1 |
||
| 9 | |||
| 10 | struct mb_cache_entry; |
||
| 11 | |||
| 12 | struct mb_cache_op { |
||
| 13 | int (*free)(struct mb_cache_entry *, int); |
||
| 14 | }; |
||
| 15 | |||
| 16 | struct mb_cache { |
||
| 17 | struct list_head c_cache_list; |
||
| 18 | const char *c_name; |
||
| 19 | struct mb_cache_op c_op; |
||
| 20 | atomic_t c_entry_count; |
||
| 21 | int c_bucket_bits; |
||
| 22 | #ifndef MB_CACHE_INDEXES_COUNT |
||
| 23 | int c_indexes_count; |
||
| 24 | #endif |
||
| 25 | kmem_cache_t *c_entry_cache; |
||
| 26 | struct list_head *c_block_hash; |
||
| 27 | struct list_head *c_indexes_hash[0]; |
||
| 28 | }; |
||
| 29 | |||
| 30 | struct mb_cache_entry_index { |
||
| 31 | struct list_head o_list; |
||
| 32 | unsigned int o_key; |
||
| 33 | }; |
||
| 34 | |||
| 35 | struct mb_cache_entry { |
||
| 36 | struct list_head e_lru_list; |
||
| 37 | struct mb_cache *e_cache; |
||
| 38 | atomic_t e_used; |
||
| 39 | struct block_device *e_bdev; |
||
| 40 | sector_t e_block; |
||
| 41 | struct list_head e_block_list; |
||
| 42 | struct mb_cache_entry_index e_indexes[0]; |
||
| 43 | }; |
||
| 44 | |||
| 45 | /* Functions on caches */ |
||
| 46 | |||
| 47 | struct mb_cache * mb_cache_create(const char *, struct mb_cache_op *, size_t, |
||
| 48 | int, int); |
||
| 49 | void mb_cache_shrink(struct mb_cache *, struct block_device *); |
||
| 50 | void mb_cache_destroy(struct mb_cache *); |
||
| 51 | |||
| 52 | /* Functions on cache entries */ |
||
| 53 | |||
| 54 | struct mb_cache_entry *mb_cache_entry_alloc(struct mb_cache *); |
||
| 55 | int mb_cache_entry_insert(struct mb_cache_entry *, struct block_device *, |
||
| 56 | sector_t, unsigned int[]); |
||
| 57 | void mb_cache_entry_rehash(struct mb_cache_entry *, unsigned int[]); |
||
| 58 | void mb_cache_entry_release(struct mb_cache_entry *); |
||
| 59 | void mb_cache_entry_takeout(struct mb_cache_entry *); |
||
| 60 | void mb_cache_entry_free(struct mb_cache_entry *); |
||
| 61 | struct mb_cache_entry *mb_cache_entry_dup(struct mb_cache_entry *); |
||
| 62 | struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *, |
||
| 63 | struct block_device *, |
||
| 64 | sector_t); |
||
| 65 | #if !defined(MB_CACHE_INDEXES_COUNT) || (MB_CACHE_INDEXES_COUNT > 0) |
||
| 66 | struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache, int, |
||
| 67 | struct block_device *, |
||
| 68 | unsigned int); |
||
| 69 | struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache_entry *, int, |
||
| 70 | struct block_device *, |
||
| 71 | unsigned int); |
||
| 72 | #endif |