diff options
Diffstat (limited to 'drivers/md/dm-bufio.h')
| -rw-r--r-- | drivers/md/dm-bufio.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/md/dm-bufio.h b/drivers/md/dm-bufio.h index 5c4c3a04e38..c096779a729 100644 --- a/drivers/md/dm-bufio.h +++ b/drivers/md/dm-bufio.h @@ -63,6 +63,14 @@ void *dm_bufio_new(struct dm_bufio_client *c, sector_t block, struct dm_buffer **bp); /* + * Prefetch the specified blocks to the cache. + * The function starts to read the blocks and returns without waiting for + * I/O to finish. + */ +void dm_bufio_prefetch(struct dm_bufio_client *c, + sector_t block, unsigned n_blocks); + +/* * Release a reference obtained with dm_bufio_{read,get,new}. The data * pointer and dm_buffer pointer is no longer valid after this call. */ @@ -100,6 +108,18 @@ int dm_bufio_issue_flush(struct dm_bufio_client *c); */ void dm_bufio_release_move(struct dm_buffer *b, sector_t new_block); +/* + * Free the given buffer. + * This is just a hint, if the buffer is in use or dirty, this function + * does nothing. + */ +void dm_bufio_forget(struct dm_bufio_client *c, sector_t block); + +/* + * Set the minimum number of buffers before cleanup happens. + */ +void dm_bufio_set_minimum_buffers(struct dm_bufio_client *c, unsigned n); + unsigned dm_bufio_get_block_size(struct dm_bufio_client *c); sector_t dm_bufio_get_device_size(struct dm_bufio_client *c); sector_t dm_bufio_get_block_number(struct dm_buffer *b); |