linux-kernel - Re: [PATCH 1/2] openvswitch: support asymmetric conntrack

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Message-Id: <20191204.163232.1306369201437008300.davem@davemloft.net>
Date:   Wed, 04 Dec 2019 16:32:32 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     aconole@...hat.com
Cc:     netdev@...r.kernel.org, pshelar@....org, jhs@...atatu.com,
        xiyou.wangcong@...il.com, jiri@...nulli.us, dev@...nvswitch.org,
        linux-kernel@...r.kernel.org, mleitner@...hat.com,
        paulb@...lanox.com, roid@...lanox.com, nicolas.dichtel@...nd.com
Subject: Re: [PATCH 1/2] openvswitch: support asymmetric conntrack

From: Aaron Conole <aconole@...hat.com>
Date: Tue,  3 Dec 2019 16:34:13 -0500

> The openvswitch module shares a common conntrack and NAT infrastructure
> exposed via netfilter.  It's possible that a packet needs both SNAT and
> DNAT manipulation, due to e.g. tuple collision.  Netfilter can support
> this because it runs through the NAT table twice - once on ingress and
> again after egress.  The openvswitch module doesn't have such capability.
> 
> Like netfilter hook infrastructure, we should run through NAT twice to
> keep the symmetry.
> 
> Fixes: 05752523e565 ("openvswitch: Interface with NAT.")
> Signed-off-by: Aaron Conole <aconole@...hat.com>
> ---
> NOTE: this is a repost to see if the email client issues go away.

Applied and queued up for -stable.