78 lines
2.3 KiB
Python
78 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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"""
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Abstract base class for NetApp NAS protocol helper classes.
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"""
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import abc
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import six
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from manila.common import constants
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from manila import utils
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def access_rules_synchronized(f):
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"""Decorator for synchronizing share access rule modification methods."""
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def wrapped_func(self, *args, **kwargs):
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# The first argument is always a share, which has an ID
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key = "share-access-%s" % args[0]['id']
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@utils.synchronized(key)
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def source_func(self, *args, **kwargs):
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return f(self, *args, **kwargs)
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return source_func(self, *args, **kwargs)
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return wrapped_func
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@six.add_metaclass(abc.ABCMeta)
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class NetAppBaseHelper(object):
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"""Interface for protocol-specific NAS drivers."""
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def __init__(self):
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self._client = None
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def set_client(self, client):
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self._client = client
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def _is_readonly(self, access_level):
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"""Returns whether an access rule specifies read-only access."""
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return access_level == constants.ACCESS_LEVEL_RO
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@abc.abstractmethod
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def create_share(self, share, share_name):
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"""Creates NAS share."""
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@abc.abstractmethod
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def delete_share(self, share, share_name):
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"""Deletes NAS share."""
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@abc.abstractmethod
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def update_access(self, share, share_name, rules):
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"""Replaces the list of access rules known to the backend storage."""
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@abc.abstractmethod
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def get_target(self, share):
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"""Returns host where the share located."""
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@abc.abstractmethod
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def get_share_name_for_share(self, share):
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"""Returns the flexvol name that hosts a share."""
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@abc.abstractmethod
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def cleanup_demoted_replica(self, share, share_name):
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"""Do some cleanup regarding the former active replica"""
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