Re: [PATCH 20/38] netns ct: NOTRACK in netns

[Pablo Neira Ayuso <pablo@netfilter.org>]

Patrick McHardy wrote:
> Alexey Dobriyan wrote:
>> On Thu, Sep 04, 2008 at 06:54:16PM +0200, Patrick McHardy wrote:
>>> adobriyan@gmail.com wrote:
>>>> Make untracked conntrack per-netns. Compare conntracks with relevant
>>>> untracked one.
>>>>
>>>> The following code you'll start laughing at this code:
>>>>
>>>>     if (ct == ct->ct_net->ct.untracked)
>>>>         ...
>>>>
>>>> let me remind you that ->ct_net is set in only one place, and never
>>>> overwritten later.
>>>>
>>>> All of this requires some surgery with headers, otherwise horrible
>>>> circular
>>>> dependencies. And we lost nf_ct_is_untracked() as function, it
>>>> became macro.
>>> I think you could avoid this mess by using a struct nf_conntrack
>>> for the untracked conntrack instead of struct nf_conn. It shouldn't
>>> make any difference since its ignored anyways.
>>
>> Ewww, can I?
> 
> I hope so :) A different possiblity suggest by Pablo some time ago
> would be to mark untracked packets in skb->nfctinfo and not
> attach a conntrack at all.

Indeed, I remember that :). I left that patch of the table time ago [1].
There's a nf_reset call missing as Patrick said at that time. I can
recover it if you like the idea.

[1]
http://lists.netfilter.org/pipermail/netfilter-devel/2005-June/020171.html

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