From 7cf6d6457c74a63ec7df282c402fcd31a60a12af Mon Sep 17 00:00:00 2001
From: zhangsong <zhangsong@cmss.chinamobile.com>
Date: Sat, 14 Nov 2015 00:44:53 +0800
Subject: [PATCH] Fix the bug of can't get the desired image info

When we use 'qemu-img info' command to get image info, some kinds
of image may show an 'unavailable' disk size. For example:

$qemu-img info sheepdog:volume-1af1afa0-7820-4063-9b90-4fa6161a74a9
image: sheepdog:volume-1af1afa0-7820-4063-9b90-4fa6161a74a9
file format: raw
virtual size: 10G (10737418240 bytes)
disk size: unavailable

$qemu-img info -f rbd rbd:data/foo
image: rbd:data/foo
file format: rbd
virtual size: 10G (10737418240 bytes)
disk size: unavailable
cluster_size: 4194304

The current code didn't consider 'unavailable' size, and it will
raise a ValueError in this case. This patch fixed this bug by
adding the judgment of 'unavailable' size.

Change-Id: Ic5f3b80e172baaafc07432319f8aa24bf117b392
Closes-Bug: #1516083
---
 cinder/openstack/common/imageutils.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cinder/openstack/common/imageutils.py b/cinder/openstack/common/imageutils.py
index 9a85e8512..c41d896e8 100644
--- a/cinder/openstack/common/imageutils.py
+++ b/cinder/openstack/common/imageutils.py
@@ -93,7 +93,7 @@ class QemuImgInfo(object):
                 real_details = backing_match.group(2).strip()
         elif root_cmd in ['virtual_size', 'cluster_size', 'disk_size']:
             # Replace it with the byte amount (if we can convert it)
-            if root_details == 'None':
+            if root_details in ('None', 'unavailable'):
                 real_details = 0
             else:
                 real_details = self._extract_bytes(root_details)
-- 
2.45.2