From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
To: linux-block@vger.kernel.org
Cc: axboe@kernel.dk, hch@lst.de,
Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Subject: [PATCH 6/8] null_blk: allow memory-backed write-zeroes-bio
Date: Thu, 11 Jul 2019 10:53:26 -0700 [thread overview]
Message-ID: <20190711175328.16430-7-chaitanya.kulkarni@wdc.com> (raw)
In-Reply-To: <20190711175328.16430-1-chaitanya.kulkarni@wdc.com>
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@wdc.com>
---
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
next prev parent reply other threads:[~2019-07-11 17:54 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-11 17:53 [PATCH 0/8] null_blk: add missing write-zeroes and discard support Chaitanya Kulkarni
2019-07-11 17:53 ` [PATCH 1/8] null_blk: add module parameter for REQ_OP_DISCARD Chaitanya Kulkarni
2019-07-28 6:04 ` Minwoo Im
2019-07-30 4:48 ` Chaitanya Kulkarni
2019-07-11 17:53 ` [PATCH 2/8] null_blk: add REQ_OP_WRITE_ZEROES config property Chaitanya Kulkarni
2019-07-28 6:17 ` Minwoo Im
2019-07-11 17:53 ` [PATCH 3/8] null_blk: add support for write-zeroes Chaitanya Kulkarni
2019-07-28 6:08 ` Minwoo Im
2019-07-11 17:53 ` [PATCH 4/8] null_blk: allow memory-backed write-zeroes-req Chaitanya Kulkarni
2019-07-28 6:11 ` Minwoo Im
2019-07-11 17:53 ` [PATCH 5/8] null_blk: code cleaup Chaitanya Kulkarni
2019-07-28 6:12 ` Minwoo Im
2019-07-11 17:53 ` Chaitanya Kulkarni [this message]
2019-07-28 6:18 ` [PATCH 6/8] null_blk: allow memory-backed write-zeroes-bio Minwoo Im
2019-07-11 17:53 ` [PATCH 7/8] null_blk: add support for configfs write_zeroes Chaitanya Kulkarni
2019-07-11 17:53 ` [PATCH 8/8] null_blk: adjusts the code with latest changes Chaitanya Kulkarni
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