linux-kernel - Re: [PATCH 08/14] NFSv4: Add label recommended attribute and NFSv4 flags

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Message-ID: <alpine.LRH.2.00.0904032239330.16607@tundra.namei.org>
Date:	Fri, 3 Apr 2009 22:43:15 +1100 (EST)
From:	James Morris <jmorris@...ei.org>
To:	"David P. Quigley" <dpquigl@...ho.nsa.gov>
cc:	hch@...radead.org, viro@...iv.linux.org.uk, casey@...aufler-ca.com,
	sds@...ho.nsa.gov, "Matthew N. Dodd" <matthew.dodd@...rta.com>,
	trond.myklebust@....uio.no, bfields@...ldses.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-security-module@...r.kernel.org, selinux@...ho.nsa.gov,
	labeled-nfs@...ux-nfs.org
Subject: Re: [PATCH 08/14] NFSv4: Add label recommended attribute and NFSv4
 flags

On Fri, 3 Apr 2009, David P. Quigley wrote:

> We tried to change this to be dynamically allocated based on what was
> coming off of the wire but we ran into a problem that it required us to
> do allocations where they really shouldn't be done in the rpc/nfsv4
> code. Trond suggested to make this static and that if someone really
> needed more than a page for their label that something was horrifically
> wrong. I'm tempted to agree with him on this but there are people trying
> to send contexts with an MLS component with every other compartment set
> which tend to be really large. 

Well, future labels might include cryptographic information, for example.

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