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| author | Philipp Reisner <philipp.reisner@linbit.com> | 2016-06-14 01:26:15 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2016-06-14 06:43:04 +0300 |
| commit | 92d94ae66aebda5e4832d96e96b95117c44693b5 (patch) | |
| tree | 08266c08a393aa5ca014d38d9813f61f74f5ae81 /drivers/block/drbd/drbd_protocol.h | |
| parent | a5ca66c419410b4a26ab47b120d5424bd1d33700 (diff) | |
| download | linux-92d94ae66aebda5e4832d96e96b95117c44693b5.tar.xz | |
drbd: Create the protocol feature THIN_RESYNC
If thinly provisioned volumes are used, during a resync the sync source
tries to find out if a block is deallocated. If it is deallocated, then
the resync target uses block_dev_issue_zeroout() on the range in
question.
Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/drbd/drbd_protocol.h')
| -rw-r--r-- | drivers/block/drbd/drbd_protocol.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/block/drbd/drbd_protocol.h b/drivers/block/drbd/drbd_protocol.h index ce0e72ca47ec..95ca4586af59 100644 --- a/drivers/block/drbd/drbd_protocol.h +++ b/drivers/block/drbd/drbd_protocol.h @@ -165,6 +165,7 @@ struct p_block_req { */ #define FF_TRIM 1 +#define FF_THIN_RESYNC 2 struct p_connection_features { u32 protocol_min; |