145 lines
4.8 KiB
Python
145 lines
4.8 KiB
Python
# Copyright (c) 2016 Huawei Technologies Co., Ltd.
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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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import json
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from oslo_log import log as logging
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from cinder import exception
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from cinder.i18n import _
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from cinder import utils
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from cinder.volume.drivers.huawei import constants
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LOG = logging.getLogger(__name__)
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class SmartQos(object):
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def __init__(self, client):
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self.client = client
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def _check_qos_consistency(self, policy, qos):
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for key in [k.upper() for k in constants.QOS_SPEC_KEYS]:
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if qos.get(key, '0') != policy.get(key, '0'):
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return False
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return True
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def _change_lun_priority(self, qos, lun_id):
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for key in qos:
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if key.startswith('MIN') or key.startswith('LATENCY'):
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data = {"IOPRIORITY": "3"}
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self.client.update_lun(lun_id, data)
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break
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@utils.synchronized('huawei_qos', external=True)
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def add(self, qos, lun_id):
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self._change_lun_priority(qos, lun_id)
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qos_id = self.client.create_qos(qos, lun_id)
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try:
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self.client.activate_deactivate_qos(qos_id, True)
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except exception.VolumeBackendAPIException:
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self.remove(qos_id, lun_id)
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raise
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return qos_id
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@utils.synchronized('huawei_qos', external=True)
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def remove(self, qos_id, lun_id, qos_info=None):
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if not qos_info:
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qos_info = self.client.get_qos_info(qos_id)
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lun_list = json.loads(qos_info['LUNLIST'])
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if lun_id in lun_list:
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lun_list.remove(lun_id)
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if len(lun_list) == 0:
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if qos_info['RUNNINGSTATUS'] != constants.QOS_INACTIVATED:
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self.client.activate_deactivate_qos(qos_id, False)
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self.client.delete_qos(qos_id)
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else:
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self.client.update_qos_luns(qos_id, lun_list)
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def update(self, qos_id, new_qos, lun_id):
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qos_info = self.client.get_qos_info(qos_id)
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if self._check_qos_consistency(qos_info, new_qos):
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return
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self.remove(qos_id, lun_id, qos_info)
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self.add(new_qos, lun_id)
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class SmartPartition(object):
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def __init__(self, client):
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self.client = client
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def add(self, partitionname, lun_id):
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partition_id = self.client.get_partition_id_by_name(partitionname)
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if not partition_id:
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msg = _('Cannot find partition by name %s.') % partitionname
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LOG.error(msg)
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raise exception.InvalidInput(reason=msg)
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self.client.add_lun_to_partition(lun_id, partition_id)
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return partition_id
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def remove(self, partition_id, lun_id):
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self.client.remove_lun_from_partition(lun_id, partition_id)
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def update(self, partition_id, partitionname, lun_id):
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partition_info = self.client.get_partition_info_by_id(partition_id)
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if partition_info['NAME'] == partitionname:
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return
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self.remove(partition_id, lun_id)
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self.add(partitionname, lun_id)
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def check_partition_valid(self, partitionname):
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partition_id = self.client.get_partition_id_by_name(partitionname)
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if not partition_id:
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msg = _("Partition %s doesn't exist.") % partitionname
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LOG.error(msg)
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raise exception.InvalidInput(reason=msg)
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class SmartCache(object):
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def __init__(self, client):
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self.client = client
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def add(self, cachename, lun_id):
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cache_id = self.client.get_cache_id_by_name(cachename)
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if not cache_id:
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msg = _('Cannot find cache by name %s.') % cachename
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LOG.error(msg)
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raise exception.InvalidInput(reason=msg)
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self.client.add_lun_to_cache(lun_id, cache_id)
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return cache_id
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def remove(self, cache_id, lun_id):
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self.client.remove_lun_from_cache(lun_id, cache_id)
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def update(self, cache_id, cachename, lun_id):
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cache_info = self.client.get_cache_info_by_id(cache_id)
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if cache_info['NAME'] == cachename:
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return
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self.remove(cache_id, lun_id)
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self.add(cachename, lun_id)
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def check_cache_valid(self, cachename):
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cache_id = self.client.get_cache_id_by_name(cachename)
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if not cache_id:
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msg = _("Cache %s doesn't exit.") % cachename
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LOG.error(msg)
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raise exception.InvalidInput(reason=msg)
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