73 lines
2.3 KiB
Python
73 lines
2.3 KiB
Python
# 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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from cinder import db
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from cinder import objects
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class VolumeMigration(object):
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"""Lightweight Volume Migration object.
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Will be used by KeyMigrator instead of regular Volume object to avoid
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extra memory usage.
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"""
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@staticmethod
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def from_volume(volume, context):
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volume_migration = VolumeMigration(volume.id,
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volume.user_id,
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volume.encryption_key_id)
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volume_migration._context = context
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return volume_migration
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def __init__(self, id, user_id, encryption_key_id):
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self.id = id
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self.user_id = user_id
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self.orig_encryption_key_id = encryption_key_id
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self.encryption_key_id = encryption_key_id
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def _get_updates(self):
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updates = {}
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if self.orig_encryption_key_id != self.encryption_key_id:
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updates['encryption_key_id'] = self.encryption_key_id
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return updates
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def _reset_changes(self):
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self.orig_encryption_key_id = self.encryption_key_id
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def save(self):
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updates = self._get_updates()
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if updates:
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db.volume_update(self._context, self.id, updates)
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self._reset_changes()
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def __str__(self):
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return 'id = {}'.format(self.id)
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def __repr__(self):
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return self.__str__()
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class VolumeMigrationList(list):
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def __init__(self):
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list.__init__(self)
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def append(self, volumes, context):
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if not isinstance(volumes, objects.volume.VolumeList):
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return
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for volume in volumes:
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volume_migration = VolumeMigration.from_volume(volume, context)
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super(VolumeMigrationList, self).append(volume_migration)
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