netdev - Re: [PATCHv4 net-next 05/10] openvswitch: Add conntrack action

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Date:	Wed, 19 Aug 2015 13:30:24 -0700
From:	Pravin Shelar <pshelar@...ira.com>
To:	Joe Stringer <joestringer@...ira.com>
Cc:	netdev <netdev@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>, pablo <pablo@...filter.org>,
	Florian Westphal <fwestpha@...hat.com>,
	Hannes Sowa <hannes@...hat.com>, Thomas Graf <tgraf@...g.ch>,
	Justin Pettit <jpettit@...ira.com>,
	Jesse Gross <jesse@...ira.com>, Andy Zhou <azhou@...ira.com>
Subject: Re: [PATCHv4 net-next 05/10] openvswitch: Add conntrack action

On Tue, Aug 18, 2015 at 4:39 PM, Joe Stringer <joestringer@...ira.com> wrote:
> Expose the kernel connection tracker via OVS. Userspace components can
> make use of the "ct()" action, followed by "recirculate", to populate
> the conntracking state in the OVS flow key, and subsequently match on
> that state.
>
> Example ODP flows allowing traffic from 1->2, only replies from 2->1:
> in_port=1,tcp,action=ct(commit,zone=1),2
> in_port=2,ct_state=-trk,tcp,action=ct(zone=1),recirc(1)
> recirc_id=1,in_port=2,ct_state=+trk+est-new,tcp,action=1
>
> IP fragments are handled by transparently assembling them as part of the
> ct action. The maximum received unit (MRU) size is tracked so that
> refragmentation can occur during output.
>
> IP frag handling contributed by Andy Zhou.
>
> Signed-off-by: Joe Stringer <joestringer@...ira.com>
> Signed-off-by: Justin Pettit <jpettit@...ira.com>
> Signed-off-by: Andy Zhou <azhou@...ira.com>
Acked-by: Pravin B Shelar <pshelar@...ira.com>
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