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# 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 re
import nova.conf
from nova.virt.libvirt import utils as libvirt_utils
from nova.virt.libvirt.volume import fs
from nova.virt.libvirt.volume import remotefs
CONF = nova.conf.CONF
USERNAME_REGEX = re.compile(r"(user(?:name)?)=(?:[^ ,]+\\)?([^ ,]+)")
class LibvirtSMBFSVolumeDriver(fs.LibvirtBaseFileSystemVolumeDriver):
"""Class implements libvirt part of volume driver for SMBFS."""
def _get_mount_point_base(self):
return CONF.libvirt.smbfs_mount_point_base
def get_config(self, connection_info, disk_info):
"""Returns xml for libvirt."""
conf = super(LibvirtSMBFSVolumeDriver,
self).get_config(connection_info, disk_info)
conf.source_type = 'file'
conf.driver_cache = 'writeback'
conf.source_path = connection_info['data']['device_path']
conf.driver_format = connection_info['data'].get('format', 'raw')
return conf
def connect_volume(self, connection_info, instance):
"""Connect the volume."""
smbfs_share = connection_info['data']['export']
mount_path = self._get_mount_path(connection_info)
if not libvirt_utils.is_mounted(mount_path, smbfs_share):
mount_options = self._parse_mount_options(connection_info)
remotefs.mount_share(mount_path, smbfs_share,
export_type='cifs', options=mount_options)
device_path = self._get_device_path(connection_info)
connection_info['data']['device_path'] = device_path
def disconnect_volume(self, connection_info, instance, force=False):
"""Disconnect the volume."""
smbfs_share = connection_info['data']['export']
mount_path = self._get_mount_path(connection_info)
remotefs.unmount_share(mount_path, smbfs_share)
def _parse_mount_options(self, connection_info):
mount_options = " ".join(
[connection_info['data'].get('options') or '',
CONF.libvirt.smbfs_mount_options])
if not USERNAME_REGEX.findall(mount_options):
mount_options = mount_options + ' -o username=guest'
else:
# Remove the Domain Name from user name
mount_options = USERNAME_REGEX.sub(r'\1=\2', mount_options)
return mount_options.strip(", ").split(' ')
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