netdev - Re: [PATCH] net: clear iflink when moving to a new netns

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Message-ID: <CAHA+R7O4_a3wJct+rHhaQv+0OZHYV=c4+=QS9MTrQy5=rB1jLA@mail.gmail.com>
Date:	Thu, 13 Feb 2014 14:44:05 -0800
From:	Cong Wang <cwang@...pensource.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	netdev <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <eric.dumazet@...il.com>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>
Subject: Re: [PATCH] net: clear iflink when moving to a new netns

On Wed, Feb 12, 2014 at 6:00 PM, Eric W. Biederman
<ebiederm@...ssion.com> wrote:
>
> There was an effort not long ago to make tunnels safe to pass between
> namespaces.  NETIF_F_NETNS_LOCAL was removed from ip6_tunnel in that
> effort.  Apparently something was overlooked.
>
> Making iflink a netdevice reference or finding a way to remove it
> entirely seems better that masking the problem.
>

Yeah, looks like the trend is allowing more stacked devices to move to
a new netns.
Sounds good. I am working on a draft patch now.

Thanks.
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