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# Copyright 2013 Cloudbase Solutions Srl
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import mock
from oslo.utils import units
from nova import test
from nova.virt.hyperv import constants
from nova.virt.hyperv import vhdutilsv2
class VHDUtilsV2TestCase(test.NoDBTestCase):
"""Unit tests for the Hyper-V VHDUtilsV2 class."""
_FAKE_VHD_PATH = "C:\\fake_path.vhdx"
_FAKE_PARENT_VHD_PATH = "C:\\fake_parent_path.vhdx"
_FAKE_FORMAT = 3
_FAKE_MAK_INTERNAL_SIZE = units.Gi
_FAKE_TYPE = 3
_FAKE_JOB_PATH = 'fake_job_path'
_FAKE_RET_VAL = 0
_FAKE_VHD_FORMAT = 'vhdx'
_FAKE_BLOCK_SIZE = 33554432
_FAKE_LOG_SIZE = 1048576
_FAKE_LOGICAL_SECTOR_SIZE = 4096
_FAKE_METADATA_SIZE = 1048576
_FAKE_VHD_INFO = {'ParentPath': _FAKE_PARENT_VHD_PATH,
'Format': _FAKE_FORMAT,
'BlockSize': _FAKE_BLOCK_SIZE,
'LogicalSectorSize': _FAKE_LOGICAL_SECTOR_SIZE,
'Type': _FAKE_TYPE}
def setUp(self):
self._vhdutils = vhdutilsv2.VHDUtilsV2()
self._vhdutils._conn = mock.MagicMock()
self._vhdutils._vmutils = mock.MagicMock()
self._vhdutils.get_vhd_format = mock.MagicMock(
return_value=self._FAKE_VHD_FORMAT)
self._fake_file_handle = mock.MagicMock()
self._fake_vhd_info_xml = (
'<INSTANCE CLASSNAME="Msvm_VirtualHardDiskSettingData">'
'<PROPERTY NAME="BlockSize" TYPE="uint32">'
'<VALUE>33554432</VALUE>'
'</PROPERTY>'
'<PROPERTY NAME="Caption" TYPE="string">'
'<VALUE>Virtual Hard Disk Setting Data</VALUE>'
'</PROPERTY>'
'<PROPERTY NAME="Description" TYPE="string">'
'<VALUE>Setting Data for a Virtual Hard Disk.</VALUE>'
'</PROPERTY>'
'<PROPERTY NAME="ElementName" TYPE="string">'
'<VALUE>fake_path.vhdx</VALUE>'
'</PROPERTY>'
'<PROPERTY NAME="Format" TYPE="uint16">'
'<VALUE>%(format)s</VALUE>'
'</PROPERTY>'
'<PROPERTY NAME="InstanceID" TYPE="string">'
'<VALUE>52794B89-AC06-4349-AC57-486CAAD52F69</VALUE>'
'</PROPERTY>'
'<PROPERTY NAME="LogicalSectorSize" TYPE="uint32">'
'<VALUE>512</VALUE>'
'</PROPERTY>'
'<PROPERTY NAME="MaxInternalSize" TYPE="uint64">'
'<VALUE>%(max_internal_size)s</VALUE>'
'</PROPERTY>'
'<PROPERTY NAME="ParentPath" TYPE="string">'
'<VALUE>%(parent_path)s</VALUE>'
'</PROPERTY>'
'<PROPERTY NAME="Path" TYPE="string">'
'<VALUE>%(path)s</VALUE>'
'</PROPERTY>'
'<PROPERTY NAME="PhysicalSectorSize" TYPE="uint32">'
'<VALUE>4096</VALUE>'
'</PROPERTY>'
'<PROPERTY NAME="Type" TYPE="uint16">'
'<VALUE>%(type)s</VALUE>'
'</PROPERTY>'
'</INSTANCE>' %
{'path': self._FAKE_VHD_PATH,
'parent_path': self._FAKE_PARENT_VHD_PATH,
'format': self._FAKE_FORMAT,
'max_internal_size': self._FAKE_MAK_INTERNAL_SIZE,
'type': self._FAKE_TYPE})
super(VHDUtilsV2TestCase, self).setUp()
def test_get_vhd_info(self):
mock_img_svc = self._vhdutils._conn.Msvm_ImageManagementService()[0]
mock_img_svc.GetVirtualHardDiskSettingData.return_value = (
self._FAKE_JOB_PATH, self._FAKE_RET_VAL, self._fake_vhd_info_xml)
vhd_info = self._vhdutils.get_vhd_info(self._FAKE_VHD_PATH)
self.assertEqual(self._FAKE_VHD_PATH, vhd_info['Path'])
self.assertEqual(self._FAKE_PARENT_VHD_PATH, vhd_info['ParentPath'])
self.assertEqual(self._FAKE_FORMAT, vhd_info['Format'])
self.assertEqual(self._FAKE_MAK_INTERNAL_SIZE,
vhd_info['MaxInternalSize'])
self.assertEqual(self._FAKE_TYPE, vhd_info['Type'])
def test_create_dynamic_vhd(self):
self._vhdutils.get_vhd_info = mock.MagicMock(
return_value={'Format': self._FAKE_FORMAT})
mock_img_svc = self._vhdutils._conn.Msvm_ImageManagementService()[0]
mock_img_svc.CreateVirtualHardDisk.return_value = (self._FAKE_JOB_PATH,
self._FAKE_RET_VAL)
self._vhdutils.create_dynamic_vhd(self._FAKE_VHD_PATH,
self._FAKE_MAK_INTERNAL_SIZE,
constants.DISK_FORMAT_VHDX)
self.assertTrue(mock_img_svc.CreateVirtualHardDisk.called)
def test_create_differencing_vhd(self):
self._vhdutils.get_vhd_info = mock.MagicMock(
return_value={'ParentPath': self._FAKE_PARENT_VHD_PATH,
'Format': self._FAKE_FORMAT})
mock_img_svc = self._vhdutils._conn.Msvm_ImageManagementService()[0]
mock_img_svc.CreateVirtualHardDisk.return_value = (self._FAKE_JOB_PATH,
self._FAKE_RET_VAL)
self._vhdutils.create_differencing_vhd(self._FAKE_VHD_PATH,
self._FAKE_PARENT_VHD_PATH)
self.assertTrue(mock_img_svc.CreateVirtualHardDisk.called)
def test_reconnect_parent_vhd(self):
mock_img_svc = self._vhdutils._conn.Msvm_ImageManagementService()[0]
self._vhdutils._get_vhd_info_xml = mock.MagicMock(
return_value=self._fake_vhd_info_xml)
mock_img_svc.SetVirtualHardDiskSettingData.return_value = (
self._FAKE_JOB_PATH, self._FAKE_RET_VAL)
self._vhdutils.reconnect_parent_vhd(self._FAKE_VHD_PATH,
self._FAKE_PARENT_VHD_PATH)
mock_img_svc.SetVirtualHardDiskSettingData.assert_called_once_with(
VirtualDiskSettingData=self._fake_vhd_info_xml)
def test_resize_vhd(self):
mock_img_svc = self._vhdutils._conn.Msvm_ImageManagementService()[0]
mock_img_svc.ResizeVirtualHardDisk.return_value = (self._FAKE_JOB_PATH,
self._FAKE_RET_VAL)
self._vhdutils.get_internal_vhd_size_by_file_size = mock.MagicMock(
return_value=self._FAKE_MAK_INTERNAL_SIZE)
self._vhdutils.resize_vhd(self._FAKE_VHD_PATH,
self._FAKE_MAK_INTERNAL_SIZE)
mock_img_svc.ResizeVirtualHardDisk.assert_called_once_with(
Path=self._FAKE_VHD_PATH,
MaxInternalSize=self._FAKE_MAK_INTERNAL_SIZE)
self.mock_get = self._vhdutils.get_internal_vhd_size_by_file_size
self.mock_get.assert_called_once_with(self._FAKE_VHD_PATH,
self._FAKE_MAK_INTERNAL_SIZE)
def _test_get_vhdx_internal_size(self, vhd_type):
self._vhdutils.get_vhd_info = mock.MagicMock()
self._vhdutils.get_vhd_parent_path = mock.Mock(
return_value=self._FAKE_PARENT_VHD_PATH)
if vhd_type == 4:
self._vhdutils.get_vhd_info.side_effect = [
{'Type': vhd_type}, self._FAKE_VHD_INFO]
else:
self._vhdutils.get_vhd_info.return_value = self._FAKE_VHD_INFO
self._vhdutils._get_vhdx_log_size = mock.MagicMock(
return_value=self._FAKE_LOG_SIZE)
self._vhdutils._get_vhdx_metadata_size_and_offset = mock.MagicMock(
return_value=(self._FAKE_METADATA_SIZE, 1024))
self._vhdutils._get_vhdx_block_size = mock.MagicMock(
return_value=self._FAKE_BLOCK_SIZE)
file_mock = mock.MagicMock()
with mock.patch('__builtin__.open', file_mock):
internal_size = (
self._vhdutils.get_internal_vhd_size_by_file_size(
self._FAKE_VHD_PATH, self._FAKE_MAK_INTERNAL_SIZE))
self.assertEqual(self._FAKE_MAK_INTERNAL_SIZE - self._FAKE_BLOCK_SIZE,
internal_size)
def test_get_vhdx_internal_size_dynamic(self):
self._test_get_vhdx_internal_size(3)
def test_get_vhdx_internal_size_differencing(self):
self._test_get_vhdx_internal_size(4)
def test_get_vhdx_current_header(self):
VHDX_HEADER_OFFSETS = [64 * 1024, 128 * 1024]
fake_sequence_numbers = ['\x01\x00\x00\x00\x00\x00\x00\x00',
'\x02\x00\x00\x00\x00\x00\x00\x00']
self._fake_file_handle.read = mock.MagicMock(
side_effect=fake_sequence_numbers)
offset = self._vhdutils._get_vhdx_current_header_offset(
self._fake_file_handle)
self.assertEqual(offset, VHDX_HEADER_OFFSETS[1])
def test_get_vhdx_metadata_size(self):
fake_metadata_offset = '\x01\x00\x00\x00\x00\x00\x00\x00'
fake_metadata_size = '\x01\x00\x00\x00'
self._fake_file_handle.read = mock.MagicMock(
side_effect=[fake_metadata_offset, fake_metadata_size])
metadata_size, metadata_offset = (
self._vhdutils._get_vhdx_metadata_size_and_offset(
self._fake_file_handle))
self.assertEqual(metadata_size, 1)
self.assertEqual(metadata_offset, 1)
def test_get_block_size(self):
self._vhdutils._get_vhdx_metadata_size_and_offset = mock.MagicMock(
return_value=(self._FAKE_METADATA_SIZE, 1024))
fake_block_size = '\x01\x00\x00\x00'
self._fake_file_handle.read = mock.MagicMock(
return_value=fake_block_size)
block_size = self._vhdutils._get_vhdx_block_size(
self._fake_file_handle)
self.assertEqual(block_size, 1)
def test_get_log_size(self):
fake_current_header_offset = 64 * 1024
self._vhdutils._get_vhdx_current_header_offset = mock.MagicMock(
return_value=fake_current_header_offset)
fake_log_size = '\x01\x00\x00\x00'
self._fake_file_handle.read = mock.MagicMock(
return_value=fake_log_size)
log_size = self._vhdutils._get_vhdx_log_size(self._fake_file_handle)
self.assertEqual(log_size, 1)
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