linux-kernel - [PATCH AUTOSEL 5.4 07/10] nvmet-tcp: fix unhandled tcp states in nvmet_tcp_state

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Date:   Sat, 10 Sep 2022 17:18:58 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Maurizio Lombardi <mlombard@...hat.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Chaitanya Kulkarni <kch@...dia.com>,
        Christoph Hellwig <hch@....de>,
        Sasha Levin <sashal@...nel.org>, linux-nvme@...ts.infradead.org
Subject: [PATCH AUTOSEL 5.4 07/10] nvmet-tcp: fix unhandled tcp states in nvmet_tcp_state_change()

From: Maurizio Lombardi <mlombard@...hat.com>

[ Upstream commit 478814a5584197fa1fb18377653626e3416e7cd6 ]

TCP_FIN_WAIT2 and TCP_LAST_ACK were not handled, the connection is closing
so we can ignore them and avoid printing the "unhandled state"
warning message.

[ 1298.852386] nvmet_tcp: queue 2 unhandled state 5
[ 1298.879112] nvmet_tcp: queue 7 unhandled state 5
[ 1298.884253] nvmet_tcp: queue 8 unhandled state 5
[ 1298.889475] nvmet_tcp: queue 9 unhandled state 5

v2: Do not call nvmet_tcp_schedule_release_queue(), just ignore
the fin_wait2 and last_ack states.

Signed-off-by: Maurizio Lombardi <mlombard@...hat.com>
Reviewed-by: Sagi Grimberg <sagi@...mberg.me>
Reviewed-by: Chaitanya Kulkarni <kch@...dia.com>
Signed-off-by: Christoph Hellwig <hch@....de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/nvme/target/tcp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c
index e9512d077b8a8..eb5b39c2bba84 100644
--- a/drivers/nvme/target/tcp.c
+++ b/drivers/nvme/target/tcp.c
@@ -1416,6 +1416,9 @@ static void nvmet_tcp_state_change(struct sock *sk)
 		goto done;
 
 	switch (sk->sk_state) {
+	case TCP_FIN_WAIT2:
+	case TCP_LAST_ACK:
+		break;
 	case TCP_FIN_WAIT1:
 	case TCP_CLOSE_WAIT:
 	case TCP_CLOSE:
-- 
2.35.1