netdev - Re: [PATCH] ipv4: Disallow non-namespace aware protocols to register.

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Message-Id: <20130215.134136.798843717749865061.davem@davemloft.net>
Date:	Fri, 15 Feb 2013 13:41:36 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	ebiederm@...ssion.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] ipv4: Disallow non-namespace aware protocols to
 register.

From: ebiederm@...ssion.com (Eric W. Biederman)
Date: Thu, 14 Feb 2013 22:25:26 -0800

> David Miller <davem@...emloft.net> writes:
> 
>> All in-tree ipv4 protocol implementations are now namespace
>> aware.  Therefore all the run-time checks are superfluous.
>>
>> Reject registry of any non-namespace aware ipv4 protocol.
>> Eventually we'll remove prot->netns_ok and this registry
>> time check as well.
> 
> It has been a long time coming but this is very cool to see we have
> finally made all of ipv4 network namespace aware.

BTW, I took a look at ipv6 and unlike ipv4 there seems to be no sanity
checks or per-protocol booleans indicating proper netns support.

Is my interpretation right that ipv6 just assumes all registered
protocols are netns aware at this point?

If so that was definitely a bug, because things like l2tp have an
ipv6 component and were not fully netns aware until very recently.
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