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qcow2.py: Add required padding for header extensions 

The qcow2 specification requires that the header extension data be
padded to round up the extension size to the next multiple of 8 bytes.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 1416935562-7760-3-git-send-email-kwolf@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 8884dd1bbc)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
(cherry picked from commit a163ac3f57b5baa117158f7c0488d276ba3377e2)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Kevin Wolf 2014-11-25 18:12:41 +01:00 committed by Michael Roth
parent b495764ae8
commit 75eb0f5dbb
1 changed files with 4 additions and 0 deletions
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4
tests/qemu-iotests/qcow2.py
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@ -7,6 +7,10 @@ import string
class QcowHeaderExtension:
def __init__(self, magic, length, data):
if length % 8 != 0:
padding = 8 - (length % 8)
data += "\0" * padding
self.magic = magic
self.length = length
self.data = data