111 lines
3.6 KiB
Python
111 lines
3.6 KiB
Python
# Copyright 2019 Intel Inc.
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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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from oslo_serialization import jsonutils
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from nova.db.main import api as db
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from nova.objects import base
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from nova.objects import fields
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@base.NovaObjectRegistry.register
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class ResourceMetadata(base.NovaObject):
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# Version 1.0: Initial version
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VERSION = "1.0"
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# This is parent object of specific resources.
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# And it's used to be a object field of Resource,
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# that is to say Resource.metadata.
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def __eq__(self, other):
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return base.all_things_equal(self, other)
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def __ne__(self, other):
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return not (self == other)
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@base.NovaObjectRegistry.register
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class Resource(base.NovaObject):
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# Version 1.0: Initial version
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VERSION = "1.0"
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fields = {
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# UUID of resource provider
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'provider_uuid': fields.UUIDField(),
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# resource class of the Resource
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'resource_class': fields.ResourceClassField(),
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# identifier is used to identify resource, it is up to virt drivers
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# for mdev, it will be a UUID, for vpmem, it's backend namespace name
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'identifier': fields.StringField(),
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# metadata is used to contain virt driver specific resource info
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'metadata': fields.ObjectField('ResourceMetadata', subclasses=True),
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}
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def __eq__(self, other):
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return base.all_things_equal(self, other)
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def __ne__(self, other):
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return not (self == other)
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def __hash__(self):
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metadata = self.metadata if 'metadata' in self else None
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return hash((self.provider_uuid, self.resource_class,
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self.identifier, metadata))
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@base.NovaObjectRegistry.register
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class ResourceList(base.ObjectListBase, base.NovaObject):
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# Version 1.0: Initial version
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VERSION = "1.0"
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fields = {
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'objects': fields.ListOfObjectsField('Resource'),
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}
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@base.remotable_classmethod
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def get_by_instance_uuid(cls, context, instance_uuid):
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db_extra = db.instance_extra_get_by_instance_uuid(
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context, instance_uuid, columns=['resources'])
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if not db_extra or db_extra['resources'] is None:
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return None
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primitive = jsonutils.loads(db_extra['resources'])
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resources = cls.obj_from_primitive(primitive)
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return resources
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@base.NovaObjectRegistry.register
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class LibvirtVPMEMDevice(ResourceMetadata):
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# Version 1.0: Initial version
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VERSION = "1.0"
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fields = {
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# This is configured in file, used to generate resource class name
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# CUSTOM_PMEM_NAMESPACE_$LABEL
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'label': fields.StringField(),
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# Backend pmem namespace's name
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'name': fields.StringField(),
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# Backend pmem namespace's size
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'size': fields.IntegerField(),
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# Backend device path
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'devpath': fields.StringField(),
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# Backend pmem namespace's alignment
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'align': fields.IntegerField(),
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}
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def __hash__(self):
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# Be sure all fields are set before using hash method
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return hash((self.label, self.name, self.size,
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self.devpath, self.align))
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