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From: Goldwyn Rodrigues <rgoldwyn@suse.de>
To: linux-block@vger.kernel.org
Cc: hch@infradead.org, jack@suse.cz, linux-raid@vger.kernel.org,
	dm-devel@redhat.com, Goldwyn Rodrigues <rgoldwyn@suse.com>
Subject: [PATCH 8/9] dm: Add nowait support to dm-delay
Date: Wed, 26 Jul 2017 18:58:05 -0500	[thread overview]
Message-ID: <20170726235806.12148-9-rgoldwyn@suse.de> (raw)
In-Reply-To: <20170726235806.12148-1-rgoldwyn@suse.de>

From: Goldwyn Rodrigues <rgoldwyn@suse.com>

I/O should bail out if any value for delay is set.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
---
 drivers/md/dm-delay.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/md/dm-delay.c b/drivers/md/dm-delay.c
index ae3158795d26..97da97c3c039 100644
--- a/drivers/md/dm-delay.c
+++ b/drivers/md/dm-delay.c
@@ -240,6 +240,10 @@ static int delay_bio(struct delay_c *dc, int delay, struct bio *bio)
 	if (!delay || !atomic_read(&dc->may_delay))
 		return DM_MAPIO_REMAPPED;
 
+	if (bio->bi_opf & REQ_NOWAIT) {
+		bio_wouldblock_error(bio);
+		return DM_MAPIO_SUBMITTED;
+	}
 	delayed = dm_per_bio_data(bio, sizeof(struct dm_delay_info));
 
 	delayed->context = dc;
-- 
2.12.3


  parent reply	other threads:[~2017-07-26 23:58 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-26 23:57 [PATCH 0/9] Nowait feature for stacked block devices Goldwyn Rodrigues
2017-07-26 23:57 ` [PATCH 1/9] QUEUE_FLAG_NOWAIT to indicate device supports nowait Goldwyn Rodrigues
2017-08-08 20:32   ` Shaohua Li
2017-08-08 20:36     ` Jens Axboe
2017-08-10  2:18       ` Jens Axboe
2017-08-10 11:38         ` Goldwyn Rodrigues
2017-08-10 14:14           ` Jens Axboe
2017-08-10 17:15             ` Goldwyn Rodrigues
2017-08-10 17:17               ` Jens Axboe
2017-08-09 11:44     ` Goldwyn Rodrigues
2017-08-09 15:02       ` Shaohua Li
2017-08-09 15:35         ` Goldwyn Rodrigues
2017-08-09 20:21           ` Shaohua Li
2017-08-09 22:16             ` Goldwyn Rodrigues
2017-08-10  1:17               ` Shaohua Li
2017-08-10  2:07                 ` Goldwyn Rodrigues
2017-08-10  2:17                   ` Jens Axboe
2017-08-10 11:49                     ` Goldwyn Rodrigues
2017-08-10 14:23                       ` Jens Axboe
2017-08-10 14:25                       ` Jan Kara
2017-08-10 14:28                         ` Jens Axboe
2017-08-10 17:15                           ` Goldwyn Rodrigues
2017-08-10 17:20                             ` Jens Axboe
2017-07-26 23:57 ` [PATCH 2/9] md: Add nowait support to md Goldwyn Rodrigues
2017-08-08 20:34   ` Shaohua Li
2017-07-26 23:58 ` [PATCH 3/9] md: raid1 nowait support Goldwyn Rodrigues
2017-08-08 20:39   ` Shaohua Li
2017-08-09 11:45     ` Goldwyn Rodrigues
2017-07-26 23:58 ` [PATCH 4/9] md: raid5 " Goldwyn Rodrigues
2017-08-08 20:43   ` Shaohua Li
2017-08-09 11:45     ` Goldwyn Rodrigues
2017-07-26 23:58 ` [PATCH 5/9] md: raid10 " Goldwyn Rodrigues
2017-08-08 20:40   ` Shaohua Li
2017-07-26 23:58 ` [PATCH 6/9] dm: add " Goldwyn Rodrigues
2017-07-26 23:58 ` [PATCH 7/9] dm: Add nowait support to raid1 Goldwyn Rodrigues
2017-07-26 23:58 ` Goldwyn Rodrigues [this message]
2017-07-26 23:58 ` [PATCH 9/9] dm-mpath: Add nowait support Goldwyn Rodrigues
2017-10-04 13:55 [PATCH v2 0/9] Nowait support for stacked block devices Goldwyn Rodrigues
2017-10-04 13:55 ` [PATCH 8/9] dm: Add nowait support to dm-delay Goldwyn Rodrigues

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