Re: [PATCH 1/5] rds: tcp: release the created connection

On 2017/3/27 15:37, Sowmini Varadhan wrote:

On (03/27/17 03:06), Zhu Yanjun wrote:

quoted

Date: Mon, 27 Mar 2017 03:06:26 -0400
From: Zhu Yanjun <redacted>
To: yanjun.zhu-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org, santosh.shilimkar-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org,
  netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
  rds-devel-N0ozoZBvEnrZJqsBc5GL+g@public.gmane.org, junxiao.bi-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org, joe.jin-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org
Subject: [PATCH 1/5] rds: tcp: release the created connection
X-Mailer: git-send-email 2.7.4

When some error occurs, the created connection should be destroyed.

No please dont do this.

This is the case when there are duelling connections. We want
to reset the new (accept sock) and leave the old socket in place.

How did you test this? Did you test it with network namespaces?

Sorry. I just made simple test. It seems that it worked well. Would you 
like to show me some test about this patch?

Thanks a lot.
Zhu Yanjun

--Sowmini

quoted

  net/rds/tcp_listen.c | 1 +

diff --git a/net/rds/tcp_listen.c b/net/rds/tcp_listen.c
index 5076788..58aa5bc 100644
--- a/net/rds/tcp_listen.c
+++ b/net/rds/tcp_listen.c

@@ -196,6 +196,7 @@ int rds_tcp_accept_one(struct socket *sock)
  rst_nsk:
  	/* reset the newly returned accept sock and bail */
  	kernel_sock_shutdown(new_sock, SHUT_RDWR);
+	rds_conn_destroy(conn);
  	ret = 0;
  out:
  	if (rs_tcp)

-- 
2.7.4

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On (03/27/17 16:05), Yanjun Zhu wrote:

Sorry. I just made simple test. It seems that it worked well. Would you like
to show me some test about this patch?

Your patch is a non-trivial bug. Dont do this.

Please read the comments above the "goto rst_nsk" in that function.
Also note the comments above rds_conn_destroy.

Thanks
--Sowmini