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From: Christoph Hellwig <hch@lst.de>
To: darrick.wong@oracle.com, viro@ZenIV.linux.org.uk
Cc: Anna.Schumaker@netapp.com, linux-fsdevel@vger.kernel.org
Subject: make copy_file_range do the right thing
Date: Fri, 25 Nov 2016 09:40:00 +0100
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Sender: linux-fsdevel-owner@vger.kernel.org
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Hi all,

this patch consolidates the attempt to clone a file before copying
in the VFS.  This avoids boilerplate code in filesystems and makes
them do the right thing automatically.

I think this should go in before the series from Darrick to implement
clone_file_range for ocfs2, preferably together with these patches.