linux-kernel - Re: [RFC][PATCH 00/12] Enhanced file stat system call

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Message-ID: <5654779A.9000702@schaufler-ca.com>
Date:	Tue, 24 Nov 2015 06:43:38 -0800
From:	Casey Schaufler <casey@...aufler-ca.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	David Howells <dhowells@...hat.com>, arnd@...db.de,
	linux-afs@...r.kernel.org, linux-nfs@...r.kernel.org,
	linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-ext4@...r.kernel.org
Subject: Re: [RFC][PATCH 00/12] Enhanced file stat system call

On 11/24/2015 12:15 AM, Christoph Hellwig wrote:
> On Fri, Nov 20, 2015 at 08:50:22AM -0800, Casey Schaufler wrote:
>> How about relevant xattrs? SELinux context, ACL, that sort of thing.
>> The fact that these are optional should be taken care of by (4).
> Those are not simple, fixed size stat data and would make the system
> call a giant mess.
>
I didn't say it would be easy. I do think that adding a system call
that only deals with simple, fixed size data is going to fall short
of solving "the problem".

Actually, a Smack label is fixed size (256 bytes). I suspect there
is a maximum for SELinux contexts as well. ACLs I'll grant you are
infinite.

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