39 lines
1.3 KiB
Python
39 lines
1.3 KiB
Python
# Copyright 2018 Huawei
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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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"""
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Revert to snapshot capable volume driver interface.
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"""
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from cinder.interface import base
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class VolumeSnapshotRevertDriver(base.CinderInterface):
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"""Interface for drivers that support revert to snapshot."""
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def revert_to_snapshot(self, context, volume, snapshot):
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"""Revert volume to snapshot.
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Note: the revert process should not change the volume's
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current size, that means if the driver shrank
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the volume during the process, it should extend the
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volume internally.
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:param context: the context of the caller.
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:param volume: The volume to be reverted.
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:param snapshot: The snapshot used for reverting.
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"""
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