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| author | Mikulas Patocka <mpatocka@redhat.com> | 2014-01-13 19:12:36 -0500 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2014-01-14 23:23:02 -0500 |
| commit | 55494bf2947dccdf2d98b62374fea7365dfead84 (patch) | |
| tree | 08958b0812f1c59732f6a56e2b567ad3a8da7230 /drivers/md/dm-bufio.h | |
| parent | 2cadabd512acca99e6553d303eaedc97a3178a4d (diff) | |
| download | lwn-55494bf2947dccdf2d98b62374fea7365dfead84.tar.gz lwn-55494bf2947dccdf2d98b62374fea7365dfead84.zip | |
dm snapshot: use dm-bufio
Use dm-bufio for initial loading of the exceptions.
Introduce a new function dm_bufio_forget that frees the given buffer.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-bufio.h')
| -rw-r--r-- | drivers/md/dm-bufio.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/md/dm-bufio.h b/drivers/md/dm-bufio.h index b142946a9e32..3dac37627ba4 100644 --- a/drivers/md/dm-bufio.h +++ b/drivers/md/dm-bufio.h @@ -108,6 +108,13 @@ 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); + 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); |