/
instance_pci_requests.py
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/
instance_pci_requests.py
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# 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.
from oslo_serialization import jsonutils
from oslo_utils import versionutils
from nova.db import api as db
from nova.objects import base
from nova.objects import fields
# TODO(berrange): Remove NovaObjectDictCompat
@base.NovaObjectRegistry.register
class InstancePCIRequest(base.NovaObject,
base.NovaObjectDictCompat):
# Version 1.0: Initial version
# Version 1.1: Add request_id
# Version 1.2: Add PCI NUMA affinity policy
# Version 1.3: Add requester_id
VERSION = '1.3'
# Possible sources for a PCI request:
# FLAVOR_ALIAS : Request originated from a flavor alias.
# NEUTRON_PORT : Request originated from a neutron port.
FLAVOR_ALIAS = 0
NEUTRON_PORT = 1
fields = {
'count': fields.IntegerField(),
'spec': fields.ListOfDictOfNullableStringsField(),
'alias_name': fields.StringField(nullable=True),
# Note(moshele): is_new is deprecated and should be removed
# on major version bump
'is_new': fields.BooleanField(default=False),
'request_id': fields.UUIDField(nullable=True),
'requester_id': fields.StringField(nullable=True),
'numa_policy': fields.PCINUMAAffinityPolicyField(nullable=True),
}
@property
def source(self):
# PCI requests originate from two sources: instance flavor alias and
# neutron SR-IOV ports.
# SR-IOV ports pci_request don't have an alias_name.
return (InstancePCIRequest.NEUTRON_PORT if self.alias_name is None
else InstancePCIRequest.FLAVOR_ALIAS)
def obj_load_attr(self, attr):
setattr(self, attr, None)
def obj_make_compatible(self, primitive, target_version):
super(InstancePCIRequest, self).obj_make_compatible(primitive,
target_version)
target_version = versionutils.convert_version_to_tuple(target_version)
if target_version < (1, 3) and 'requester_id' in primitive:
del primitive['requester_id']
if target_version < (1, 2) and 'numa_policy' in primitive:
del primitive['numa_policy']
if target_version < (1, 1) and 'request_id' in primitive:
del primitive['request_id']
# TODO(berrange): Remove NovaObjectDictCompat
@base.NovaObjectRegistry.register
class InstancePCIRequests(base.NovaObject,
base.NovaObjectDictCompat):
# Version 1.0: Initial version
# Version 1.1: InstancePCIRequest 1.1
VERSION = '1.1'
fields = {
'instance_uuid': fields.UUIDField(),
'requests': fields.ListOfObjectsField('InstancePCIRequest'),
}
@classmethod
def obj_from_db(cls, context, instance_uuid, db_requests):
self = cls(context=context, requests=[],
instance_uuid=instance_uuid)
if db_requests is not None:
requests = jsonutils.loads(db_requests)
else:
requests = []
for request in requests:
# Note(moshele): is_new is deprecated and therefore we load it
# with default value of False
request_obj = InstancePCIRequest(
count=request['count'], spec=request['spec'],
alias_name=request['alias_name'], is_new=False,
numa_policy=request.get('numa_policy',
fields.PCINUMAAffinityPolicy.LEGACY),
request_id=request['request_id'],
requester_id=request.get('requester_id'))
request_obj.obj_reset_changes()
self.requests.append(request_obj)
self.obj_reset_changes()
return self
@base.remotable_classmethod
def get_by_instance_uuid(cls, context, instance_uuid):
db_pci_requests = db.instance_extra_get_by_instance_uuid(
context, instance_uuid, columns=['pci_requests'])
if db_pci_requests is not None:
db_pci_requests = db_pci_requests['pci_requests']
return cls.obj_from_db(context, instance_uuid, db_pci_requests)
@staticmethod
def _load_legacy_requests(sysmeta_value, is_new=False):
if sysmeta_value is None:
return []
requests = []
db_requests = jsonutils.loads(sysmeta_value)
for db_request in db_requests:
request = InstancePCIRequest(
count=db_request['count'], spec=db_request['spec'],
alias_name=db_request['alias_name'], is_new=is_new)
request.obj_reset_changes()
requests.append(request)
return requests
@classmethod
def get_by_instance(cls, context, instance):
# NOTE (baoli): not all callers are passing instance as object yet.
# Therefore, use the dict syntax in this routine
if 'pci_requests' in instance['system_metadata']:
# NOTE(danms): This instance hasn't been converted to use
# instance_extra yet, so extract the data from sysmeta
sysmeta = instance['system_metadata']
_requests = (
cls._load_legacy_requests(sysmeta['pci_requests']) +
cls._load_legacy_requests(sysmeta.get('new_pci_requests'),
is_new=True))
requests = cls(instance_uuid=instance['uuid'], requests=_requests)
requests.obj_reset_changes()
return requests
else:
return cls.get_by_instance_uuid(context, instance['uuid'])
def to_json(self):
blob = [{'count': x.count,
'spec': x.spec,
'alias_name': x.alias_name,
'is_new': x.is_new,
'numa_policy': x.numa_policy,
'request_id': x.request_id,
'requester_id': x.requester_id} for x in self.requests]
return jsonutils.dumps(blob)
@classmethod
def from_request_spec_instance_props(cls, pci_requests):
objs = [InstancePCIRequest(**request)
for request in pci_requests['requests']]
return cls(requests=objs, instance_uuid=pci_requests['instance_uuid'])