Commit 5eac5f33 authored Aug 18, 2020 by Chao Leng Committed by Jens Axboe Aug 21, 2020

nvme: redirect commands on dying queue



If a command send through nvme-multipath failed on a dying queue, resend it
on another path.

Signed-off-by: Chao Leng <lengchao@huawei.com>
[hch: rebased on top of the completion refactoring]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 1e41f3bd

drivers/nvme/host/core.c

+5 −4

Original line number	Diff line number	Diff line
		@@ -274,12 +274,13 @@ static inline enum nvme_disposition nvme_decide_disposition(struct request *req)
		return COMPLETE;

		if (req->cmd_flags & REQ_NVME_MPATH) {
		if (nvme_is_path_error(nvme_req(req)->status))
		if (nvme_is_path_error(nvme_req(req)->status) \|\|
		blk_queue_dying(req->q))
		return FAILOVER;
		}

		} else {
		if (blk_queue_dying(req->q))
		return COMPLETE;
		}

		return RETRY;
		}

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