From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jamie Lokier <jamie@shareable.org>
Subject: Re: [PATCH 0/4] Fiemap, an extent mapping ioctl - round 2
Date: Wed, 2 Jul 2008 15:26:51 +0100
Message-ID: <20080702142650.GA2993@shareable.org>
References: <20080625221835.GQ28100@wotan.suse.de> <20080626093634.GA30025@shareable.org> <20080626102403.GN6239@webber.adilger.int> <20080626121950.GB32417@shareable.org> <20080626131600.GS29319@disturbed> <48639E2B.4000401@redhat.com> <20080626141649.GD3356@shareable.org> <20080626165618.GP6239@webber.adilger.int> <1DAFD0EF-FF4A-456C-A7E6-E718031E220D@cam.ac.uk> <20080702063331.GQ6239@webber.adilger.int>
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Cc: Anton Altaparmakov <aia21@cam.ac.uk>,
	Eric Sandeen <sandeen@redhat.com>,
	Mark Fasheh <mfasheh@suse.com>, linux-fsdevel@vger.kernel.org,
	Andreas Dilger <adilger@shaw.ca>,
	Kalpak Shah <Kalpak.Shah@sun.com>,
	Josef Bacik <jbacik@redhat.com>
To: Andreas Dilger <adilger@sun.com>
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Andreas Dilger wrote:
> If there are large "xattrs" (i.e. data forks) then I'd suggest instead
> to use openat() to open the data fork and call FIEMAP on that directly.

Ooh.  Can yon openat() with a file as dirfd?  Equivalently, can you
open "file/fork"?

That sounds like the "file-as-directory" feature Reiser tried to get
into the kernel some time back.  Wasn't it rejected after a long
discussion?

-- Jamie