netdev - Re: network namespace and kernel bind issue

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Message-ID: <20121002085128.53251583@nehalam.linuxnetplumber.net>
Date:	Tue, 2 Oct 2012 08:51:28 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Julian Anastasov <ja@....bg>, James Chapman <jchapman@...alix.com>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>, netdev@...r.kernel.org
Subject: Re: network namespace and kernel bind issue

On Tue, 2 Oct 2012 09:15:46 +0300 (EEST)
Julian Anastasov <ja@....bg> wrote:

> 
> 	Hello,
> 
> On Mon, 1 Oct 2012, Stephen Hemminger wrote:
> 
> > The problem was vxlan wasn't doing sk_change_net on the created socket.
> > 
> > I'm testing that fix.
> > 
> > The long term fix is to change sock_create_kern() to take a 'struct net'
> > argument. This would avoid the trap of having to change the namespace.
> > Also several places using __sock_create() could use it.
> > 
> > L2TP still looks to have several namespace related issues.
> 
> 	There should be also .netnsok = true in l2tp_nl_family
> as final step.
> 
> Regards
> 
> --
> Julian Anastasov <ja@....bg>

There are actually lots more net namespace issues in L2TP.
For example session and tunnel counts are global, not per namespace.
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