Btrfs: check for read permission on src file in the clone ioctl
authorDan Rosenberg <dan.j.rosenberg@gmail.com>
Sat, 15 May 2010 15:27:37 +0000 (11:27 -0400)
committerChris Mason <chris.mason@oracle.com>
Sat, 15 May 2010 16:05:50 +0000 (12:05 -0400)
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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