diff options
Diffstat (limited to 'include/linux/dm-bufio.h')
| -rw-r--r-- | include/linux/dm-bufio.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/dm-bufio.h b/include/linux/dm-bufio.h index 3c8b7d274bd9..29d255fdd5d6 100644 --- a/include/linux/dm-bufio.h +++ b/include/linux/dm-bufio.h @@ -119,6 +119,11 @@ int dm_bufio_write_dirty_buffers(struct dm_bufio_client *c); int dm_bufio_issue_flush(struct dm_bufio_client *c); /* + * Send a discard request to the underlying device. + */ +int dm_bufio_issue_discard(struct dm_bufio_client *c, sector_t block, sector_t count); + +/* * Like dm_bufio_release but also move the buffer to the new * block. dm_bufio_write_dirty_buffers is needed to commit the new block. */ @@ -132,6 +137,13 @@ void dm_bufio_release_move(struct dm_buffer *b, sector_t new_block); void dm_bufio_forget(struct dm_bufio_client *c, sector_t block); /* + * Free the given range of buffers. + * This is just a hint, if the buffer is in use or dirty, this function + * does nothing. + */ +void dm_bufio_forget_buffers(struct dm_bufio_client *c, sector_t block, sector_t n_blocks); + +/* * Set the minimum number of buffers before cleanup happens. */ void dm_bufio_set_minimum_buffers(struct dm_bufio_client *c, unsigned n); |