From mboxrd@z Thu Jan  1 00:00:00 1970
From: redneb@gmx.com
Subject: File cloning across subvolumes with BTRFS_IOC_CLONE ioctl
Date: Tue, 20 Jul 2010 01:39:35 -0400
Message-ID: <20100720053934.GA14402@epicurus>
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To: linux-btrfs@vger.kernel.org
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It seems that the BTRFS_IOC_CLONE ioctl fails when trying to do a 
cross-subvolume clone of a file. Chris Mason suggested in the past ([1]) 
that this should be possible. Am I missing something?

[1] http://kerneltrap.org/mailarchive/linux-btrfs/2010/6/10/6884911