Re: [saag] [nfsv4] [Labeled-nfs] Common labeled security (comment on CALIPSO, labeled NFSv4)

James Morris <jmorris@namei.org> Wed, 08 April 2009 10:44 UTC

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Date: Wed, 8 Apr 2009 20:45:06 +1000 (EST)
From: James Morris <jmorris@namei.org>
To: Nicolas Williams <Nicolas.Williams@sun.com>
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Cc: labeled-nfs@linux-nfs.org, Kurt Zeilenga <Kurt.Zeilenga@Isode.com>, nfsv4@ietf.org, saag@ietf.org, nfs-discuss@opensolaris.org, Casey Schaufler <casey@schaufler-ca.com>, Santosh Chokhani <SChokhani@cygnacom.com>
Subject: Re: [saag] [nfsv4] [Labeled-nfs] Common labeled security (comment on CALIPSO, labeled NFSv4)
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On Wed, 8 Apr 2009, Nicolas Williams wrote:

> Therein lies the interop problem.  Will SELinux and Solaris TX interop
> with the labeled NFSv4 protocol we're working on?  Evidently: not w/o
> policy agreement (that was Jarret's point, which kick-started this
> thread on the NFSv4 WG list).

I don't know about TX, but it seems possible that someone might want to 
make SELinux with an MLS policy interoperate with a different MLS platform 
(note that this would not apply in the case of interop with purely legacy 
systems, as they won't have NFSv4.x support).  I have no idea how likely 
this scenario is, and I wouldn't try to accommodate this goal in the 
protocol unless a stakeholder could make a solid case for it.

Note that we should expect interoperability between Solaris FMAC and 
SELinux (i.e. the same security model implemented on different platforms, 
like Unix DAC).


- James
-- 
James Morris
<jmorris@namei.org>