This patch adds support for memory backed REQ_OP_WRITE_ZEROES operations for the null_blk bio mode.
Signed-off-by: Chaitanya Kulkarni <[email protected]> --- 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
