netdev - Re: [PATCH 2/4] [RFC] Add sock_create_kern

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Date:	Wed, 28 Apr 2010 08:06:06 -0700
From:	Dan Smith <danms@...ibm.com>
To:	David Miller <davem@...emloft.net>
Cc:	containers@...ts.osdl.org, netdev@...r.kernel.org
Subject: Re: [PATCH 2/4] [RFC] Add sock_create_kern_net()

Hi,

DM> If you can create netlink sockets in a remote NS you can also make
DM> changes there, and the whole point is to disallow changes.

DM> So maybe you won't be making changes, but others will think about
DM> using this and doing so.

I would be making changes on restart, because I insert routes.  As has
been pointed out, Eric's setns() patches allow this sort of violation
from userspace even :)

Following that example, I could have the checkpointing task stash the
current nsproxy and temporarily jump to the destination netns to do
the checkpoint.  I'll cook up something to look at...

Thanks Dave!

-- 
Dan Smith
IBM Linux Technology Center
email: danms@...ibm.com
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