From 5dc6416414fb3ec6e2825fd4d20c8bf1d7fe0395 Mon Sep 17 00:00:00 2001
From: Dan Rosenberg <dan.j.rosenberg@gmail.com>
Date: Sat, 15 May 2010 11:27:37 -0400
Subject: [PATCH] Btrfs: check for read permission on src file in the clone
 ioctl

The existing code would have allowed you to clone a file that was
only open for writing

Signed-off-by: Chris Mason <chris.mason@oracle.com>
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Reading git-format-patch failed