netdev - Re: [PATCH for 2.6.33] conntrack: restrict runtime hashsize modifications

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Message-Id: <1265370662.2861.769.camel@tonnant>
Date:	Fri, 05 Feb 2010 06:51:02 -0500
From:	Jon Masters <jonathan@...masters.org>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	Alexey Dobriyan <adobriyan@...il.com>, davem@...emloft.net,
	eric.dumazet@...il.com, netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org
Subject: Re: [PATCH for 2.6.33] conntrack: restrict runtime hashsize 
 modifications

On Fri, 2010-02-05 at 12:22 +0100, Patrick McHardy wrote:
> Alexey Dobriyan wrote:
> > On Fri, Feb 5, 2010 at 1:16 PM, Patrick McHardy <kaber@...sh.net> wrote:
> >> OK testing looks fine, although I'm quite surprised that its actually
> >> possible to change module parameters from within non-init namespaces.
> >> How is this supposed to work at all? I don't see how sysfs could
> >> possibly provide a network namespace context ...
> > 
> > 
> > You can do in write hook
> > 
> >     if (!net_eq(current->nsproxy->net_ns, &init_net))
> >             return -EINVAL;
> 
> Right, I see. So we could actually make resizing work for all
> namespaces quite easily. Is there any reason not to do this?

Yes, but I think (2.6.34) there also needs to be a better way to expose
netns topology and visualize all the hashtables on a system - if you're
the admin you really want to be able to see all of them, not just for a
particular namespace you might be in, in addition to the perns views.

We already discussed 2.6.34, I'm only mentioning this "for the record".

Jon.


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