netdev - Re: [PATCH] bridge: make bridge-nf-call-*tables default configurable

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Message-ID: <alpine.LSU.2.00.0906302211300.25417@fbirervta.pbzchgretzou.qr>
Date:	Tue, 30 Jun 2009 22:16:35 +0200 (CEST)
From:	Jan Engelhardt <jengelh@...ozas.de>
To:	David Miller <davem@...emloft.net>
cc:	herbert@...dor.apana.org.au, markmc@...hat.com,
	netdev@...r.kernel.org, kaber@...sh.net,
	netfilter-devel@...r.kernel.org
Subject: Re: [PATCH] bridge: make bridge-nf-call-*tables default
 configurable


On Tuesday 2009-06-30 21:06, David Miller wrote:
>Adding appropriate lists and persons to CC:
>
>> On Tue, Jun 30, 2009 at 05:27:47PM +0100, Mark McLoughlin wrote:
>>> 
>>> However, because nf_conntrack introduces an skb_orphan(), it is now
>>> recommended that bridge-nf-call-iptables be disabled completely so as
>>> to ensure features like TUNSETSNDBUF work as expected.
>> 
>> Patrick, does conntrack ever make sense for bridging? Perhaps
>> we should get rid of that completely?

It makes sense absolutely. Consider:

* packet enters bridge
* NF_HOOK(PF_INET6, NF_INET_PRE_ROUTING, ...) is called by nr_netfilter.c
* (connection tracking entry is set up)
* let bridging decision be "local delivery"
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