235 lines
8.0 KiB
Python
235 lines
8.0 KiB
Python
# Copyright (c) 2014 FUJITSU LIMITED
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# Copyright (c) 2014 EMC Corporation.
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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FC Drivers for ETERNUS DX arrays based on SMI-S.
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"""
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import six
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from cinder import context
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from cinder.openstack.common import lockutils
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from cinder.openstack.common import log as logging
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from cinder.volume import driver
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from cinder.volume.drivers import fujitsu_eternus_dx_common
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from cinder.zonemanager import utils as fczm_utils
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LOG = logging.getLogger(__name__)
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class FJDXFCDriver(driver.FibreChannelDriver):
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"""FC Drivers using SMI-S."""
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VERSION = "1.2.0"
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def __init__(self, *args, **kwargs):
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super(FJDXFCDriver, self).__init__(*args, **kwargs)
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self.common = fujitsu_eternus_dx_common.FJDXCommon(
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'FC',
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configuration=self.configuration)
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def check_for_setup_error(self):
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pass
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@lockutils.synchronized('ETERNUS_DX-vol', 'cinder-', True)
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def create_volume(self, volume):
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"""Creates a volume."""
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volpath = self.common.create_volume(volume)
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model_update = {}
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volume['provider_location'] = six.text_type(volpath)
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model_update['provider_location'] = volume['provider_location']
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return model_update
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@lockutils.synchronized('ETERNUS_DX-vol', 'cinder-', True)
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def create_volume_from_snapshot(self, volume, snapshot):
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"""Creates a volume from a snapshot."""
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volpath = self.common.create_volume_from_snapshot(volume, snapshot)
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model_update = {}
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volume['provider_location'] = six.text_type(volpath)
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model_update['provider_location'] = volume['provider_location']
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return model_update
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@lockutils.synchronized('ETERNUS_DX-vol', 'cinder-', True)
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def create_cloned_volume(self, volume, src_vref):
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"""Creates a cloned volume."""
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volpath = self.common.create_cloned_volume(volume, src_vref)
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model_update = {}
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volume['provider_location'] = six.text_type(volpath)
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model_update['provider_location'] = volume['provider_location']
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return model_update
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@lockutils.synchronized('ETERNUS_DX-vol', 'cinder-', True)
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def delete_volume(self, volume):
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"""Deletes a volume."""
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self.common.delete_volume(volume)
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@lockutils.synchronized('ETERNUS_DX-vol', 'cinder-', True)
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def create_snapshot(self, snapshot):
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"""Creates a snapshot."""
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ctxt = context.get_admin_context()
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volumename = snapshot['volume_name']
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index = volumename.index('-')
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volumeid = volumename[index + 1:]
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volume = self.db.volume_get(ctxt, volumeid)
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volpath = self.common.create_snapshot(snapshot, volume)
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model_update = {}
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snapshot['provider_location'] = six.text_type(volpath)
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model_update['provider_location'] = snapshot['provider_location']
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return model_update
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@lockutils.synchronized('ETERNUS_DX-vol', 'cinder-', True)
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def delete_snapshot(self, snapshot):
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"""Deletes a snapshot."""
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self.common.delete_volume(snapshot)
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def ensure_export(self, context, volume):
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"""Driver entry point to get the export info for an existing volume."""
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pass
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def create_export(self, context, volume):
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"""Driver entry point to get the export info for a new volume."""
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pass
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def remove_export(self, context, volume):
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"""Driver entry point to remove an export for a volume."""
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pass
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def check_for_export(self, context, volume_id):
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"""Make sure volume is exported."""
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pass
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@fczm_utils.AddFCZone
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@lockutils.synchronized('ETERNUS_DX-vol', 'cinder-', True)
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def initialize_connection(self, volume, connector):
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"""Initializes the connection and returns connection info.
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Assign any created volume to a compute node/host so that it can be
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used from that host.
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The driver returns a driver_volume_type of 'fibre_channel'.
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The target_wwn can be a single entry or a list of wwns that
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correspond to the list of remote wwn(s) that will export the volume.
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Example return values:
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{
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'driver_volume_type': 'fibre_channel'
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'data': {
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'target_discovered': True,
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'target_lun': 1,
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'target_wwn': '1234567890123',
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}
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}
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or
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{
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'driver_volume_type': 'fibre_channel'
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'data': {
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'target_discovered': True,
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'target_lun': 1,
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'target_wwn': ['1234567890123', '0987654321321'],
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}
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}
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"""
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device_info = self.common.initialize_connection(volume,
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connector)
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device_number = device_info['hostlunid']
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storage_system = device_info['storagesystem']
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target_wwns, init_targ_map = self._build_initiator_target_map(
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storage_system, connector)
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data = {'driver_volume_type': 'fibre_channel',
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'data': {'target_lun': device_number,
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'target_discovered': True,
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'target_wwn': target_wwns,
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'initiator_target_map': init_targ_map}}
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LOG.debug('Return FC data: %(data)s.'
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% {'data': data})
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return data
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@fczm_utils.RemoveFCZone
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@lockutils.synchronized('ETERNUS_DX-vol', 'cinder-', True)
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def terminate_connection(self, volume, connector, **kwargs):
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"""Disallow connection from connector."""
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ctrl = self.common.terminate_connection(volume, connector)
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loc = volume['provider_location']
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name = eval(loc)
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storage_system = name['keybindings']['SystemName']
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target_wwns, init_targ_map = self._build_initiator_target_map(
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storage_system, connector)
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data = {'driver_volume_type': 'fibre_channel',
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'data': {}}
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if len(ctrl) == 0:
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# No more volumes attached to the host
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data['data'] = {'target_wwn': target_wwns,
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'initiator_target_map': init_targ_map}
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LOG.debug('Return FC data: %(data)s.'
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% {'data': data})
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return data
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def _build_initiator_target_map(self, storage_system, connector):
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"""Build the target_wwns and the initiator target map."""
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target_wwns = self.common.get_target_portid(connector)
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initiator_wwns = connector['wwpns']
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init_targ_map = {}
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for initiator in initiator_wwns:
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init_targ_map[initiator] = target_wwns
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return target_wwns, init_targ_map
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@lockutils.synchronized('ETERNUS_DX-vol', 'cinder-', True)
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def extend_volume(self, volume, new_size):
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"""Extend an existing volume."""
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self.common.extend_volume(volume, new_size)
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def get_volume_stats(self, refresh=False):
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"""Get volume stats.
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If 'refresh' is True, run update the stats first.
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"""
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if refresh:
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self.update_volume_stats()
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return self._stats
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def update_volume_stats(self):
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"""Retrieve stats info from volume group."""
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LOG.debug("Updating volume stats")
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data = self.common.update_volume_stats()
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backend_name = self.configuration.safe_get('volume_backend_name')
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data['volume_backend_name'] = backend_name or 'FJDXFCDriver'
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data['storage_protocol'] = 'FC'
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data['driver_version'] = self.VERSION
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self._stats = data
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