diff options
Diffstat (limited to 'drivers/md/persistent-data/dm-block-manager.h')
| -rw-r--r-- | drivers/md/persistent-data/dm-block-manager.h | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/drivers/md/persistent-data/dm-block-manager.h b/drivers/md/persistent-data/dm-block-manager.h index 924833d2dfa..1b95dfc1778 100644 --- a/drivers/md/persistent-data/dm-block-manager.h +++ b/drivers/md/persistent-data/dm-block-manager.h @@ -97,14 +97,6 @@ int dm_bm_write_lock_zero(struct dm_block_manager *bm, dm_block_t b, int dm_bm_unlock(struct dm_block *b); /* - * An optimisation; we often want to copy a block's contents to a new - * block. eg, as part of the shadowing operation. It's far better for - * bufio to do this move behind the scenes than hold 2 locks and memcpy the - * data. - */ -int dm_bm_unlock_move(struct dm_block *b, dm_block_t n); - -/* * It's a common idiom to have a superblock that should be committed last. * * @superblock should be write-locked on entry. It will be unlocked during @@ -113,8 +105,26 @@ int dm_bm_unlock_move(struct dm_block *b, dm_block_t n); * * This method always blocks. */ -int dm_bm_flush_and_unlock(struct dm_block_manager *bm, - struct dm_block *superblock); +int dm_bm_flush(struct dm_block_manager *bm); + +/* + * Request data is prefetched into the cache. + */ +void dm_bm_prefetch(struct dm_block_manager *bm, dm_block_t b); + +/* + * Switches the bm to a read only mode. Once read-only mode + * has been entered the following functions will return -EPERM. + * + * dm_bm_write_lock + * dm_bm_write_lock_zero + * dm_bm_flush_and_unlock + * + * Additionally you should not use dm_bm_unlock_move, however no error will + * be returned if you do. + */ +void dm_bm_set_read_only(struct dm_block_manager *bm); +void dm_bm_set_read_write(struct dm_block_manager *bm); u32 dm_bm_checksum(const void *data, size_t len, u32 init_xor); |