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[11/11] rbd: set the remaining discard properties to enable support

Message ID bb124876ef478f371f1b972ffdc7e22f83c9d2b4.1396987789.git.josh.durgin@inktank.com (mailing list archive)
State New, archived
Headers show

Commit Message

Josh Durgin April 8, 2014, 8:42 p.m. UTC 
max_discard_sectors must be set for the queue to support discard.
Operations implementing discard for rbd zero data, so report that.

Signed-off-by: Josh Durgin <josh.durgin@inktank.com>
---
 drivers/block/rbd.c |    2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index c8fc8fc..8f908c4 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -3595,6 +3595,8 @@  static int rbd_init_disk(struct rbd_device *rbd_dev)
 	queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
 	q->limits.discard_granularity = segment_size;
 	q->limits.discard_alignment = segment_size;
+	q->limits.max_discard_sectors = segment_size / SECTOR_SIZE;
+	q->limits.discard_zeroes_data = 1;
 
 	blk_queue_merge_bvec(q, rbd_merge_bvec);
 	disk->queue = q;