linux-kernel - Re: [PATCH] Remove broken netfilter binary sysctls from bridging code

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Message-ID: <46F935CC.20400@trash.net>
Date:	Tue, 25 Sep 2007 18:22:36 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
CC:	linux-kernel@...r.kernel.org,
	Linux Netdev List <netdev@...r.kernel.org>
Subject: Re: [PATCH] Remove broken netfilter binary sysctls from bridging
 code

Stephen Hemminger wrote:
> On Tue, 25 Sep 2007 06:07:24 +0200
> Patrick McHardy <kaber@...sh.net> wrote:
>
>   
>> I meant removing brnf_sysctl_call_tables function, not the sysctls
>> themselves, all it does is change values != 0 to 1. Or did you
>> actually mean that something in userspace might depend on reading
>> back the value 1 after writing a value != 0?
>>     
>
> I was going farther, because don't really see the value of having
> a sysctl for this. It seems better to just not load filters if
> they aren't going to be used. Having another enable/disable hook
> just adds needless complexity.
>   

These sysctls control whether bridged packets will be handled
by iptables and friends. The bridge netfilter code always
handles bridged packets, and iptables might be loaded for
different reasons. So I don't see how that would work.

I think it should be specified in the ebtables ruleset, but
the current netfilter infrastructure doesn't allow to do that
cleanly.


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