netdev - IPv4/IPv6 nf_defrag on/off ?

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Message-ID: <201112081444.52166.hans.schillstrom@ericsson.com>
Date:	Thu, 8 Dec 2011 14:44:51 +0100
From:	Hans Schillstrom <hans.schillstrom@...csson.com>
To:	Patrick McHardy <kaber@...sh.net>,
	"pablo@...filter.org" <pablo@...filter.org>,
	"jengelh@...ozas.de" <jengelh@...ozas.de>
CC:	Hans Schillstrom <hans@...illstrom.com>,
	"netfilter-devel@...r.kernel.org" <netfilter-devel@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: IPv4/IPv6 nf_defrag on/off ?

Hello
On Thursday 08 December 2011 10:12:11 Hans Schillstrom wrote:
> Hi 
> While testing HMARK and IPv6 with nf_defrag_ipv6 (and nf_conntrack_ipv6 loaded) I can't see the defrag ?
> 
> From what I can see nf_conntrack_reasm goes into PREROUTING with prio -400
> and HMARK in PREROUTING with prio -150
> 
We are running the external interfaces in LXC containers 
i.e. in a netns and depend on that no defragmentation is done in this stage.
Fragments can arrive on any interface on any blade so...

I had an idea of a sysctl to be able to turn off nf_defrag_ipv{4,6} per namespace
Default is of course on so excisting apps will be happy.
Any objections to that idea ?

-- 
Regards
Hans Schillstrom <hans.schillstrom@...csson.com>
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