From c58aaad2ac46f8dbce9ab7f7a7a3726e332a56ee Mon Sep 17 00:00:00 2001
From: Miao Xie <miaox@cn.fujitsu.com>
Date: Thu, 28 Feb 2013 10:05:36 +0000
Subject: [PATCH] Btrfs: fix wrong reserved space when deleting a
 snapshot/subvolume

When deleting a snapshot/subvolume, we need remove root ref/backref,
dir entries and update the dir inode, so we must reserve free space
for those operations.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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Reading git-format-patch failed