From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [RFC][PATCH 0/5] Fiemap, an extent mapping ioctl
Date: Thu, 29 May 2008 01:55:24 -0400
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References: <20080525000148.GJ8325@wotan.suse.de> <20080525194203.GB24328@infradead.org> <20080527185622.GR8325@wotan.suse.de> <20080527203124.GC27827@mail.oracle.com> <20080528160201.GA7263@webber.adilger.int>
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Cc: Joel Becker <Joel.Becker@oracle.com>,
	Mark Fasheh <mfasheh@suse.com>,
	Christoph Hellwig <hch@infradead.org>,
	linux-fsdevel@vger.kernel.org, Andreas Dilger <adilger@shaw.ca>,
	Kalpak Shah <Kalpak.Shah@sun.com>,
	Eric Sandeen <sandeen@redhat.com>,
	Josef Bacik <jbacik@redhat.com>
To: Andreas Dilger <adilger@sun.com>
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On Wed, May 28, 2008 at 10:02:01AM -0600, Andreas Dilger wrote:
> The question is whether there are any (or many) filesystems that will NOT
> implement ->fiecount() as a wrapper of ->fiemap()?  At that point the
> "simplification" of the API means that there is actually more code and
> layers being called for the simple version.

ext4 for example as obvious from the code posted in this thread.