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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2013 Cloudbase Solutions Srl
# All Rights Reserved.
#
# 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 sys
if sys.platform == 'win32':
import wmi
from nova.virt.hyperv import vmutils
from xml.etree import ElementTree
class VHDUtils(object):
def __init__(self):
self._vmutils = vmutils.VMUtils()
if sys.platform == 'win32':
self._conn = wmi.WMI(moniker='//./root/virtualization')
def validate_vhd(self, vhd_path):
image_man_svc = self._conn.Msvm_ImageManagementService()[0]
(job_path, ret_val) = image_man_svc.ValidateVirtualHardDisk(
Path=vhd_path)
self._vmutils.check_ret_val(ret_val, job_path)
def create_differencing_vhd(self, path, parent_path):
image_man_svc = self._conn.Msvm_ImageManagementService()[0]
(job_path, ret_val) = image_man_svc.CreateDifferencingVirtualHardDisk(
Path=path, ParentPath=parent_path)
self._vmutils.check_ret_val(ret_val, job_path)
def reconnect_parent_vhd(self, child_vhd_path, parent_vhd_path):
image_man_svc = self._conn.Msvm_ImageManagementService()[0]
(job_path, ret_val) = image_man_svc.ReconnectParentVirtualHardDisk(
ChildPath=child_vhd_path,
ParentPath=parent_vhd_path,
Force=True)
self._vmutils.check_ret_val(ret_val, job_path)
def merge_vhd(self, src_vhd_path, dest_vhd_path):
image_man_svc = self._conn.Msvm_ImageManagementService()[0]
(job_path, ret_val) = image_man_svc.MergeVirtualHardDisk(
SourcePath=src_vhd_path,
DestinationPath=dest_vhd_path)
self._vmutils.check_ret_val(ret_val, job_path)
def resize_vhd(self, vhd_path, new_max_size):
image_man_svc = self._conn.Msvm_ImageManagementService()[0]
(job_path, ret_val) = image_man_svc.ExpandVirtualHardDisk(
Path=vhd_path, MaxInternalSize=new_max_size)
self._vmutils.check_ret_val(ret_val, job_path)
def get_vhd_parent_path(self, vhd_path):
return self.get_vhd_info(vhd_path).get("ParentPath")
def get_vhd_info(self, vhd_path):
image_man_svc = self._conn.Msvm_ImageManagementService()[0]
(vhd_info,
job_path,
ret_val) = image_man_svc.GetVirtualHardDiskInfo(vhd_path)
self._vmutils.check_ret_val(ret_val, job_path)
vhd_info_dict = {}
et = ElementTree.fromstring(vhd_info)
for item in et.findall("PROPERTY"):
name = item.attrib["NAME"]
value_text = item.find("VALUE").text
if name == "ParentPath":
vhd_info_dict[name] = value_text
elif name in ["FileSize", "MaxInternalSize"]:
vhd_info_dict[name] = long(value_text)
elif name in ["InSavedState", "InUse"]:
vhd_info_dict[name] = bool(value_text)
elif name == "Type":
vhd_info_dict[name] = int(value_text)
return vhd_info_dict
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