diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-04-05 19:21:22 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-04-08 19:25:38 +0200 |
| commit | 45c21793a6601b29926d67f7a07fe4077a45072e (patch) | |
| tree | e4ece67aa634a002b696697d904f5340b13fe970 /drivers/block/drbd/drbd_main.c | |
| parent | drbd: make intelligent use of blkdev_issue_zeroout (diff) | |
| download | linux-45c21793a6601b29926d67f7a07fe4077a45072e.tar.xz linux-45c21793a6601b29926d67f7a07fe4077a45072e.zip | |
drbd: implement REQ_OP_WRITE_ZEROES
It seems like DRBD assumes its on the wire TRIM request always zeroes data.
Use that fact to implement REQ_OP_WRITE_ZEROES.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers/block/drbd/drbd_main.c')
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 92c60cbd04ee..8e62d9f65510 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -1668,7 +1668,8 @@ static u32 bio_flags_to_wire(struct drbd_connection *connection, (bio->bi_opf & REQ_FUA ? DP_FUA : 0) | (bio->bi_opf & REQ_PREFLUSH ? DP_FLUSH : 0) | (bio_op(bio) == REQ_OP_WRITE_SAME ? DP_WSAME : 0) | - (bio_op(bio) == REQ_OP_DISCARD ? DP_DISCARD : 0); + (bio_op(bio) == REQ_OP_DISCARD ? DP_DISCARD : 0) | + (bio_op(bio) == REQ_OP_WRITE_ZEROES ? DP_DISCARD : 0); else return bio->bi_opf & REQ_SYNC ? DP_RW_SYNC : 0; } |