This patch adds support for memory backed REQ_OP_WRITE_ZEROES
operations for the null_blk bio mode.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@xxxxxxx>
---
drivers/block/null_blk_main.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c
index d463bde001b6..30cb90553167 100644
--- a/drivers/block/null_blk_main.c
+++ b/drivers/block/null_blk_main.c
@@ -1147,6 +1147,7 @@ static int null_handle_rq(struct nullb_cmd *cmd)
static int null_handle_bio(struct nullb_cmd *cmd)
{
+ unsigned int blk_bio_bytes = bio_sectors(cmd->bio) << SECTOR_SHIFT;
struct bio *bio = cmd->bio;
struct nullb *nullb = cmd->nq->dev->nullb;
int err;
@@ -1157,10 +1158,15 @@ static int null_handle_bio(struct nullb_cmd *cmd)
sector = bio->bi_iter.bi_sector;
- if (bio_op(bio) == REQ_OP_DISCARD) {
- null_handle_discard(nullb, sector,
- bio_sectors(bio) << SECTOR_SHIFT);
+ switch (bio_op(bio)) {
+ case REQ_OP_DISCARD:
+ null_handle_discard(nullb, sector, blk_bio_bytes);
+ return 0;
+ case REQ_OP_WRITE_ZEROES:
+ null_handle_write_zeroes(nullb, sector, blk_bio_bytes);
return 0;
+ default:
+ break;
}
spin_lock_irq(&nullb->lock);
--
2.17.0
