linux-kernel - Re: [PATCH 02/18] xstat: Add a pair of system calls to make extended file stats available [ver #6]

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Date:	Sun, 8 Aug 2010 05:12:09 -0700
From:	Jeremy Allison <jra@...ba.org>
To:	Neil Brown <neilb@...e.de>
Cc:	Jeremy Allison <jra@...ba.org>, Jeff Layton <jlayton@...hat.com>,
	utz lehmann <lkml123@...4n2c.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Volker.Lendecke@...net.de, David Howells <dhowells@...hat.com>,
	Jan Engelhardt <jengelh@...ozas.de>,
	linux-cifs@...r.kernel.org, linux-nfs@...r.kernel.org,
	samba-technical@...ts.samba.org, linux-kernel@...r.kernel.org,
	viro@...iv.linux.org.uk, linux-fsde@...per.es
Subject: Re: [PATCH 02/18] xstat: Add a pair of system calls to make
 extended  file stats available [ver #6]

On Fri, Aug 06, 2010 at 01:38:36PM +1000, Neil Brown wrote:
> I'm curious.  Why do you particularly care what interface the kernel uses to
> provide you with access to this attribute?

It's a matter of taste. The *BSD's have this right IMHO. It
should be part of the stat information. A file timestamp is not
an EA. Making it available that way just feels like an appalingly
tasteless kludge. It offends the artist in me :-).

> Or do you really want something like BSD's 'btime' which as I understand it
> cannot be set.  Would that be really useful to you?

It is *already* useful to us, and is widely used in
existing code. The occasions when btime is set are
relatively rare, and at that point we store it in a
separate EA for Windows reporting purposes.

Jeremy.
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