linux-kernel - Re: [PATCH] netfilter: Fix br_nf_pre_routing() in conjunction with bridge-nf-call-ip(6)tables=0

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Date:	Thu, 05 Jan 2012 20:54:55 +0100
From:	Richard Weinberger <richard@....at>
To:	Bart De Schuymer <bdschuym@...dora.be>
CC:	Stephen Hemminger <shemminger@...tta.com>, davem@...emloft.net,
	bridge@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, netfilter-devel@...r.kernel.org
Subject: Re: [PATCH] netfilter: Fix br_nf_pre_routing() in conjunction with
 bridge-nf-call-ip(6)tables=0

Am 05.01.2012 20:50, schrieb Bart De Schuymer:
> Op 5/01/2012 0:13, Richard Weinberger schreef:
>>
>> Let's export brnf_call_iptables and brnf_call_ip6tables, such that
>> physdev_mt_check() can notify the user that his iptables rule will have
>> no effect.
>>
> 
> I don't want to introduce a runtime dependency between the iptables
> physdev module and the bridge module.
> This should keep working:
> #modprobe bridge
> #modprobe xt_physdev
> #rmmod bridge
> It will stop working if you use exported symbols of the bridge module in
> the physdev module.
> 

IMHO this behavior would be useful. 8-)

Removing bridge while xt_physdev is loaded will make some netfilter
rules void.
Which is not fun on a production firewall.

Thanks,
//richard


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