From: Tao Ma <tao.ma@oracle.com>
Date: Tue, 18 Aug 2009 03:47:56 +0000 (+0800)
Subject: ocfs2: Add preserve to reflink.
X-Git-Tag: v2.6.32-rc1~173^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0fe9b66c65f3ff227da45381afe7612f91e32740;p=pandora-kernel.git

ocfs2: Add preserve to reflink.

reflink has 2 options for the destination file:
1. snapshot: reflink will attempt to preserve ownership, permissions,
   and all other security state in order to create a full snapshot.
2. new file: it will acquire the data extent sharing but will see the
   file's security state and attributes initialized as a new file.

So add the option to ocfs2.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
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