[PATCH 5.4 230/434] nvme: introduce "Command Aborted By host" status code

Greg Kroah-Hartman
2019-12-29T17:50:42Z

From: Max Gurtovoy <maxg@mellanox.com>

[ Upstream commit 2dc3947b53f573e8a75ea9cbec5588df88ca502e ]

Fix the status code of canceled requests initiated by the host according
to TP4028 (Status Code 0x371):
"Command Aborted By host: The command was aborted as a result of host
action (e.g., the host disconnected the Fabric connection)."

Also in a multipath environment, unless otherwise specified, errors of
this type (path related) should be retried using a different path, if
one is available.

Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/nvme/host/core.c | 2 +-
drivers/nvme/host/multipath.c | 1 +
include/linux/nvme.h | 1 +
3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index af3212aec871..b4e1e4379f1f 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -313,7 +313,7 @@ bool nvme_cancel_request(struct request *req, void *data, bool reserved)
if (blk_mq_request_completed(req))
return true;

- nvme_req(req)->status = NVME_SC_HOST_PATH_ERROR;
+ nvme_req(req)->status = NVME_SC_HOST_ABORTED_CMD;
blk_mq_complete_request(req);
return true;
}
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index e0f064dcbd02..132ade51ee87 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -95,6 +95,7 @@ void nvme_failover_req(struct request *req)
}
break;
case NVME_SC_HOST_PATH_ERROR:
+ case NVME_SC_HOST_ABORTED_CMD:
/*
* Temporary transport disruption in talking to the controller.
* Try to send on a new path.
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index f61d6906e59d..a260cd754f28 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -1368,6 +1368,7 @@ enum {
NVME_SC_ANA_INACCESSIBLE = 0x302,
NVME_SC_ANA_TRANSITION = 0x303,
NVME_SC_HOST_PATH_ERROR = 0x370,
+ NVME_SC_HOST_ABORTED_CMD = 0x371,

NVME_SC_CRD = 0x1800,
NVME_SC_DNR = 0x4000,
--
2.20.1