OpenStack Block Storage (Cinder)
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# Copyright 2015 SimpliVity Corp.
#
# 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_utils import versionutils
from oslo_versionedobjects import fields
from cinder import db
from cinder import exception
from cinder.i18n import _
from cinder import objects
from cinder.objects import base
from cinder.volume import volume_types
from cinder.volume import volume_utils
@base.CinderObjectRegistry.register
class VolumeType(base.CinderPersistentObject, base.CinderObject,
base.CinderObjectDictCompat, base.CinderComparableObject):
# Version 1.0: Initial version
# Version 1.1: Changed extra_specs to DictOfNullableStringsField
# Version 1.2: Added qos_specs
# Version 1.3: Add qos_specs_id
VERSION = '1.3'
OPTIONAL_FIELDS = ('extra_specs', 'projects', 'qos_specs')
fields = {
'id': fields.UUIDField(),
'name': fields.StringField(nullable=True),
'description': fields.StringField(nullable=True),
'is_public': fields.BooleanField(default=True, nullable=True),
'projects': fields.ListOfStringsField(nullable=True),
'extra_specs': fields.DictOfNullableStringsField(nullable=True),
'qos_specs_id': fields.UUIDField(nullable=True),
'qos_specs': fields.ObjectField('QualityOfServiceSpecs',
nullable=True),
}
def obj_make_compatible(self, primitive, target_version):
super(VolumeType, self).obj_make_compatible(primitive, target_version)
target_version = versionutils.convert_version_to_tuple(target_version)
if target_version < (1, 1):
if primitive.get('extra_specs'):
# Before 1.1 extra_specs field didn't allowed None values. To
# make sure we won't explode on receiver side - change Nones to
# empty string.
for k, v in primitive['extra_specs'].items():
if v is None:
primitive['extra_specs'][k] = ''
if target_version < (1, 3):
primitive.pop('qos_specs_id', None)
@classmethod
def _get_expected_attrs(cls, context, *args, **kwargs):
return 'extra_specs', 'projects'
@classmethod
def _from_db_object(cls, context, type, db_type, expected_attrs=None):
if expected_attrs is None:
expected_attrs = ['extra_specs', 'projects']
for name, field in type.fields.items():
if name in cls.OPTIONAL_FIELDS:
continue
value = db_type[name]
if isinstance(field, fields.IntegerField):
value = value or 0
type[name] = value
# Get data from db_type object that was queried by joined query
# from DB
if 'extra_specs' in expected_attrs:
type.extra_specs = {}
specs = db_type.get('extra_specs')
if specs and isinstance(specs, list):
type.extra_specs = {item['key']: item['value']
for item in specs}
elif specs and isinstance(specs, dict):
type.extra_specs = specs
if 'projects' in expected_attrs:
# NOTE(geguileo): Until projects stops being a polymorphic value we
# have to do a conversion here for VolumeTypeProjects ORM instance
# lists.
projects = db_type.get('projects', [])
if projects and not isinstance(projects[0], str):
projects = [p.project_id for p in projects]
type.projects = projects
if 'qos_specs' in expected_attrs:
qos_specs = objects.QualityOfServiceSpecs(context)
qos_specs._from_db_object(context, qos_specs, db_type['qos_specs'])
type.qos_specs = qos_specs
type._context = context
type.obj_reset_changes()
return type
def create(self):
if self.obj_attr_is_set('id'):
raise exception.ObjectActionError(action='create',
reason=_('already created'))
db_volume_type = volume_types.create(self._context, self.name,
self.extra_specs,
self.is_public, self.projects,
self.description)
self._from_db_object(self._context, self, db_volume_type)
def save(self):
updates = self.cinder_obj_get_changes()
if updates:
volume_types.update(self._context, self.id, self.name,
self.description)
self.obj_reset_changes()
def destroy(self):
with self.obj_as_admin():
updated_values = volume_types.destroy(self._context, self.id)
self.update(updated_values)
self.obj_reset_changes(updated_values.keys())
def obj_load_attr(self, attrname):
if attrname not in self.OPTIONAL_FIELDS:
raise exception.ObjectActionError(
action='obj_load_attr',
reason=_('attribute %s not lazy-loadable') % attrname)
if not self._context:
raise exception.OrphanedObjectError(method='obj_load_attr',
objtype=self.obj_name())
if attrname == 'extra_specs':
self.extra_specs = db.volume_type_extra_specs_get(self._context,
self.id)
elif attrname == 'qos_specs':
if self.qos_specs_id:
self.qos_specs = objects.QualityOfServiceSpecs.get_by_id(
self._context, self.qos_specs_id)
else:
self.qos_specs = None
elif attrname == 'projects':
volume_type_projects = db.volume_type_access_get_all(self._context,
self.id)
self.projects = [x.project_id for x in volume_type_projects]
self.obj_reset_changes(fields=[attrname])
@classmethod
def get_by_name_or_id(cls, context, identity):
orm_obj = volume_types.get_by_name_or_id(context, identity)
expected_attrs = cls._get_expected_attrs(context)
return cls._from_db_object(context, cls(context),
orm_obj, expected_attrs=expected_attrs)
def is_replicated(self):
return volume_utils.is_replicated_spec(self.extra_specs)
def is_multiattach(self):
return volume_utils.is_multiattach_spec(self.extra_specs)
@base.CinderObjectRegistry.register
class VolumeTypeList(base.ObjectListBase, base.CinderObject):
# Version 1.0: Initial version
# Version 1.1: Add pagination support to volume type
VERSION = '1.1'
fields = {
'objects': fields.ListOfObjectsField('VolumeType'),
}
@classmethod
def get_all(cls, context, inactive=0, filters=None, marker=None,
limit=None, sort_keys=None, sort_dirs=None, offset=None):
types = volume_types.get_all_types(context, inactive, filters,
marker=marker, limit=limit,
sort_keys=sort_keys,
sort_dirs=sort_dirs, offset=offset)
expected_attrs = VolumeType._get_expected_attrs(context)
return base.obj_make_list(context, cls(context),
objects.VolumeType, types.values(),
expected_attrs=expected_attrs)
@classmethod
def get_all_types_for_qos(cls, context, qos_id):
types = db.qos_specs_associations_get(context, qos_id)
return base.obj_make_list(context, cls(context), objects.VolumeType,
types)
@classmethod
def get_all_by_group(cls, context, group_id):
# Generic volume group
types = volume_types.get_all_types_by_group(
context.elevated(), group_id)
expected_attrs = VolumeType._get_expected_attrs(context)
return base.obj_make_list(context, cls(context),
objects.VolumeType, types,
expected_attrs=expected_attrs)