/usr/lib/python3/dist-packages/os_brick/initiator/connectors/sheepdog.py is in python3-os-brick 2.3.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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.
from oslo_log import log as logging
from os_brick import exception
from os_brick.i18n import _
from os_brick import initiator
from os_brick.initiator.connectors import base
from os_brick.initiator import linuxsheepdog
from os_brick import utils
DEVICE_SCAN_ATTEMPTS_DEFAULT = 3
LOG = logging.getLogger(__name__)
class SheepdogConnector(base.BaseLinuxConnector):
""""Connector class to attach/detach sheepdog volumes."""
def __init__(self, root_helper, driver=None, use_multipath=False,
device_scan_attempts=initiator.DEVICE_SCAN_ATTEMPTS_DEFAULT,
*args, **kwargs):
super(SheepdogConnector, self).__init__(root_helper, driver=driver,
device_scan_attempts=
device_scan_attempts,
*args, **kwargs)
@staticmethod
def get_connector_properties(root_helper, *args, **kwargs):
"""The Sheepdog connector properties."""
return {}
def get_volume_paths(self, connection_properties):
# TODO(lixiaoy1): don't know where the connector
# looks for sheepdog volumes.
return []
def get_search_path(self):
# TODO(lixiaoy1): don't know where the connector
# looks for sheepdog volumes.
return None
def get_all_available_volumes(self, connection_properties=None):
# TODO(lixiaoy1): not sure what to return here for sheepdog
return []
def _get_sheepdog_handle(self, connection_properties):
try:
host = connection_properties['hosts'][0]
name = connection_properties['name']
port = connection_properties['ports'][0]
except IndexError:
msg = _("Connect volume failed, malformed connection properties")
raise exception.BrickException(msg=msg)
sheepdog_handle = linuxsheepdog.SheepdogVolumeIOWrapper(
host, port, name)
return sheepdog_handle
@utils.trace
def connect_volume(self, connection_properties):
"""Connect to a volume.
:param connection_properties: The dictionary that describes all
of the target volume attributes.
:type connection_properties: dict
:returns: dict
"""
sheepdog_handle = self._get_sheepdog_handle(connection_properties)
return {'path': sheepdog_handle}
@utils.trace
def disconnect_volume(self, connection_properties, device_info,
force=False, ignore_errors=False):
"""Disconnect a volume.
:param connection_properties: The dictionary that describes all
of the target volume attributes.
:type connection_properties: dict
:param device_info: historical difference, but same as connection_props
:type device_info: dict
"""
if device_info:
sheepdog_handle = device_info.get('path', None)
self.check_IO_handle_valid(sheepdog_handle,
linuxsheepdog.SheepdogVolumeIOWrapper,
'Sheepdog')
if sheepdog_handle is not None:
sheepdog_handle.close()
def check_valid_device(self, path, run_as_root=True):
"""Verify an existing sheepdog handle is connected and valid."""
sheepdog_handle = path
if sheepdog_handle is None:
return False
original_offset = sheepdog_handle.tell()
try:
sheepdog_handle.read(4096)
except Exception as e:
LOG.error("Failed to access sheepdog device "
"handle: %(error)s",
{"error": e})
return False
finally:
sheepdog_handle.seek(original_offset, 0)
return True
def extend_volume(self, connection_properties):
# TODO(lixiaoy1): is this possible?
raise NotImplementedError
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