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# Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import copy
from oslo_serialization import jsonutils
from oslo_utils import versionutils
from nova import objects
from nova.objects import base
from nova.objects import fields
@base.NovaObjectRegistry.register
class PciDevicePool(base.NovaObject):
# Version 1.0: Initial version
# Version 1.1: Added numa_node field
VERSION = '1.1'
fields = {
'product_id': fields.StringField(),
'vendor_id': fields.StringField(),
'numa_node': fields.IntegerField(nullable=True),
'tags': fields.DictOfNullableStringsField(),
'count': fields.IntegerField(),
}
def obj_make_compatible(self, primitive, target_version):
target_version = versionutils.convert_version_to_tuple(target_version)
if target_version < (1, 1) and 'numa_node' in primitive:
del primitive['numa_node']
# NOTE(pmurray): before this object existed the pci device pool data was
# stored as a dict. For backward compatibility we need to be able to read
# it in from a dict
@classmethod
def from_dict(cls, value):
pool_dict = copy.copy(value)
pool = cls()
pool.vendor_id = pool_dict.pop("vendor_id")
pool.product_id = pool_dict.pop("product_id")
pool.numa_node = pool_dict.pop("numa_node", None)
pool.count = pool_dict.pop("count")
pool.tags = pool_dict
return pool
# NOTE(sbauza): Before using objects, pci stats was a list of
# dictionaries not having tags. For compatibility with other modules, let's
# create a reversible method
def to_dict(self):
pci_pool = base.obj_to_primitive(self)
tags = pci_pool.pop('tags', {})
for k, v in tags.items():
pci_pool[k] = v
return pci_pool
@base.NovaObjectRegistry.register
class PciDevicePoolList(base.ObjectListBase, base.NovaObject):
# Version 1.0: Initial version
# PciDevicePool <= 1.0
# Version 1.1: PciDevicePool version 1.1
VERSION = '1.1'
fields = {
'objects': fields.ListOfObjectsField('PciDevicePool'),
}
def from_pci_stats(pci_stats):
"""Create and return a PciDevicePoolList from the data stored in the db,
which can be either the serialized object, or, prior to the creation of the
device pool objects, a simple dict or a list of such dicts.
"""
pools = []
if isinstance(pci_stats, str):
try:
pci_stats = jsonutils.loads(pci_stats)
except (ValueError, TypeError):
pci_stats = None
if pci_stats:
# Check for object-ness, or old-style storage format.
if 'nova_object.namespace' in pci_stats:
return objects.PciDevicePoolList.obj_from_primitive(pci_stats)
else:
# This can be either a dict or a list of dicts
if isinstance(pci_stats, list):
pools = [objects.PciDevicePool.from_dict(stat)
for stat in pci_stats]
else:
pools = [objects.PciDevicePool.from_dict(pci_stats)]
return objects.PciDevicePoolList(objects=pools)
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