diff options
Diffstat (limited to 'include/linux/mbcache.h')
| -rw-r--r-- | include/linux/mbcache.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/include/linux/mbcache.h b/include/linux/mbcache.h new file mode 100644 index 000000000000..8e5a10410a30 --- /dev/null +++ b/include/linux/mbcache.h | |||
| @@ -0,0 +1,52 @@ | |||
| 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 | struct list_head e_lru_list; | ||
| 12 | struct mb_cache *e_cache; | ||
| 13 | unsigned short e_used; | ||
| 14 | unsigned short e_queued; | ||
| 15 | struct block_device *e_bdev; | ||
| 16 | sector_t e_block; | ||
| 17 | struct list_head e_block_list; | ||
| 18 | struct { | ||
| 19 | struct list_head o_list; | ||
| 20 | unsigned int o_key; | ||
| 21 | } e_indexes[0]; | ||
| 22 | }; | ||
| 23 | |||
| 24 | struct mb_cache_op { | ||
| 25 | int (*free)(struct mb_cache_entry *, int); | ||
| 26 | }; | ||
| 27 | |||
| 28 | /* Functions on caches */ | ||
| 29 | |||
| 30 | struct mb_cache * mb_cache_create(const char *, struct mb_cache_op *, size_t, | ||
| 31 | int, int); | ||
| 32 | void mb_cache_shrink(struct mb_cache *, struct block_device *); | ||
| 33 | void mb_cache_destroy(struct mb_cache *); | ||
| 34 | |||
| 35 | /* Functions on cache entries */ | ||
| 36 | |||
| 37 | struct mb_cache_entry *mb_cache_entry_alloc(struct mb_cache *); | ||
| 38 | int mb_cache_entry_insert(struct mb_cache_entry *, struct block_device *, | ||
| 39 | sector_t, unsigned int[]); | ||
| 40 | void mb_cache_entry_release(struct mb_cache_entry *); | ||
| 41 | void mb_cache_entry_free(struct mb_cache_entry *); | ||
| 42 | struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *, | ||
| 43 | struct block_device *, | ||
| 44 | sector_t); | ||
| 45 | #if !defined(MB_CACHE_INDEXES_COUNT) || (MB_CACHE_INDEXES_COUNT > 0) | ||
| 46 | struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache, int, | ||
| 47 | struct block_device *, | ||
| 48 | unsigned int); | ||
| 49 | struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache_entry *, int, | ||
| 50 | struct block_device *, | ||
| 51 | unsigned int); | ||
| 52 | #endif | ||