From: elad.grupi@dell.com
To: sagi@grimberg.me, linux-nvme@lists.infradead.org
Cc: Elad Grupi <elad.grupi@dell.com>
Subject: [PATCH] nvme-tcp: proper handling of tcp socket closing flows
Date: Thu, 28 Jan 2021 17:27:58 +0200 [thread overview]
Message-ID: <20210128152758.114112-1-elad.grupi@dell.com> (raw)
From: Elad Grupi <elad.grupi@dell.com>
avoid calling nvmet_tcp_release_queue_work if tcp socket was closed
before setting the sk callbacks.
Signed-off-by: Elad Grupi <elad.grupi@dell.com>
---
drivers/nvme/target/tcp.c | 24 ++++++++++++++++++++----
1 file changed, 20 insertions(+), 4 deletions(-)
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c
index d535080b781f..dac737bac874 100644
--- a/drivers/nvme/target/tcp.c
+++ b/drivers/nvme/target/tcp.c
@@ -647,7 +647,7 @@ static int nvmet_tcp_try_send_one(struct nvmet_tcp_queue *queue,
struct nvmet_tcp_cmd *cmd = queue->snd_cmd;
int ret = 0;
- if (!cmd || queue->state == NVMET_TCP_Q_DISCONNECTING) {
+ if (!cmd) {
cmd = nvmet_tcp_fetch_cmd(queue);
if (unlikely(!cmd))
return 0;
@@ -1453,9 +1453,27 @@ static int nvmet_tcp_set_queue_sock(struct nvmet_tcp_queue *queue)
sock->sk->sk_state_change = nvmet_tcp_state_change;
queue->write_space = sock->sk->sk_write_space;
sock->sk->sk_write_space = nvmet_tcp_write_space;
+
+ switch (sk->sk_state) {
+ case TCP_FIN_WAIT1:
+ case TCP_CLOSE_WAIT:
+ case TCP_CLOSE:
+ /* FALLTHRU */
+ sock->sk->sk_data_ready = queue->data_ready;
+ sock->sk->sk_state_change = queue->state_change;
+ sock->sk->sk_write_space = queue->write_space;
+ sk->sk_user_data = NULL;
+ queue->state = NVMET_TCP_Q_DISCONNECTING;
+ ret = -ENOTCONN;
+ break;
+ default:
+ queue_work_on(queue->cpu, nvmet_tcp_wq, &queue->io_work);
+ ret = 0;
+ }
+
write_unlock_bh(&sock->sk->sk_callback_lock);
- return 0;
+ return ret;
}
static int nvmet_tcp_alloc_queue(struct nvmet_tcp_port *port,
@@ -1506,8 +1524,6 @@ static int nvmet_tcp_alloc_queue(struct nvmet_tcp_port *port,
if (ret)
goto out_destroy_sq;
- queue_work_on(queue->cpu, nvmet_tcp_wq, &queue->io_work);
-
return 0;
out_destroy_sq:
mutex_lock(&nvmet_tcp_queue_mutex);
--
2.16.5
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next reply other threads:[~2021-01-28 15:28 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-28 15:27 elad.grupi [this message]
2021-01-28 22:03 ` [PATCH] nvme-tcp: proper handling of tcp socket closing flows Sagi Grimberg
2021-01-28 23:07 ` Grupi, Elad
2021-01-28 23:33 ` Sagi Grimberg
2021-01-28 23:43 ` Grupi, Elad
2021-01-28 23:54 ` Sagi Grimberg
2021-01-29 0:01 ` Grupi, Elad
2021-01-29 0:07 ` Sagi Grimberg
2021-01-31 15:47 ` Grupi, Elad
2021-01-29 22:10 ` Sagi Grimberg
2021-01-31 15:47 ` Grupi, Elad
-- strict thread matches above, loose matches on Subject: below --
2021-01-26 15:37 elad.grupi
2021-01-28 7:54 ` Sagi Grimberg
2021-01-28 15:27 ` Grupi, Elad
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