linux-kernel - [PATCH 5.4 127/348] nvmet-fc: do not check for invalid target port in nvmet_fc_handle_fcp

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Date:   Mon, 12 Jul 2021 08:08:31 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hannes Reinecke <hare@...e.de>,
        James Smart <jsmart2021@...il.com>,
        Christoph Hellwig <hch@....de>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 127/348] nvmet-fc: do not check for invalid target port in nvmet_fc_handle_fcp_rqst()

From: Hannes Reinecke <hare@...e.de>

[ Upstream commit 2a4a910aa4f0acc428dc8d10227c42e14ed21d10 ]

When parsing a request in nvmet_fc_handle_fcp_rqst() we should not
check for invalid target ports; if we do the command is aborted
from the fcp layer, causing the host to assume a transport error.
Rather we should still forward this request to the nvmet layer, which
will then correctly fail the command with an appropriate error status.

Signed-off-by: Hannes Reinecke <hare@...e.de>
Reviewed-by: James Smart <jsmart2021@...il.com>
Signed-off-by: Christoph Hellwig <hch@....de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/nvme/target/fc.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c
index fc35f7ae67b0..9b07e8c7689a 100644
--- a/drivers/nvme/target/fc.c
+++ b/drivers/nvme/target/fc.c
@@ -2151,13 +2151,6 @@ nvmet_fc_handle_fcp_rqst(struct nvmet_fc_tgtport *tgtport,
 	u32 xfrlen = be32_to_cpu(cmdiu->data_len);
 	int ret;
 
-	/*
-	 * if there is no nvmet mapping to the targetport there
-	 * shouldn't be requests. just terminate them.
-	 */
-	if (!tgtport->pe)
-		goto transport_error;
-
 	/*
 	 * Fused commands are currently not supported in the linux
 	 * implementation.
@@ -2185,7 +2178,8 @@ nvmet_fc_handle_fcp_rqst(struct nvmet_fc_tgtport *tgtport,
 
 	fod->req.cmd = &fod->cmdiubuf.sqe;
 	fod->req.cqe = &fod->rspiubuf.cqe;
-	fod->req.port = tgtport->pe->port;
+	if (tgtport->pe)
+		fod->req.port = tgtport->pe->port;
 
 	/* clear any response payload */
 	memset(&fod->rspiubuf, 0, sizeof(fod->rspiubuf));
-- 
2.30.2