OpenStack Block Storage (Cinder)
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# Copyright 2015 Intel Corporation
#
# 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_versionedobjects import fields
from cinder import db
from cinder import exception
from cinder.i18n import _
from cinder import objects
from cinder.objects import base
@base.CinderObjectRegistry.register
class CGSnapshot(base.CinderPersistentObject, base.CinderObject,
base.CinderObjectDictCompat, base.ClusteredObject):
# Version 1.0: Initial version
# Version 1.1: Added from_group_snapshot
VERSION = '1.1'
OPTIONAL_FIELDS = ['consistencygroup', 'snapshots']
fields = {
'id': fields.UUIDField(),
'consistencygroup_id': fields.UUIDField(nullable=True),
'project_id': fields.StringField(),
'user_id': fields.StringField(),
'name': fields.StringField(nullable=True),
'description': fields.StringField(nullable=True),
'status': fields.StringField(nullable=True),
'consistencygroup': fields.ObjectField('ConsistencyGroup',
nullable=True),
'snapshots': fields.ObjectField('SnapshotList', nullable=True),
}
@property
def host(self):
return self.consistencygroup.host
@property
def cluster_name(self):
return self.consistencygroup.cluster_name
@classmethod
def _from_db_object(cls, context, cgsnapshot, db_cgsnapshots,
expected_attrs=None):
expected_attrs = expected_attrs or []
for name, field in cgsnapshot.fields.items():
if name in cls.OPTIONAL_FIELDS:
continue
value = db_cgsnapshots.get(name)
setattr(cgsnapshot, name, value)
if 'consistencygroup' in expected_attrs:
consistencygroup = objects.ConsistencyGroup(context)
consistencygroup._from_db_object(context, consistencygroup,
db_cgsnapshots[
'consistencygroup'])
cgsnapshot.consistencygroup = consistencygroup
if 'snapshots' in expected_attrs:
snapshots = base.obj_make_list(
context, objects.SnapshotsList(context),
objects.Snapshots,
db_cgsnapshots['snapshots'])
cgsnapshot.snapshots = snapshots
cgsnapshot._context = context
cgsnapshot.obj_reset_changes()
return cgsnapshot
def create(self):
if self.obj_attr_is_set('id'):
raise exception.ObjectActionError(action='create',
reason=_('already_created'))
updates = self.cinder_obj_get_changes()
if 'consistencygroup' in updates:
raise exception.ObjectActionError(
action='create', reason=_('consistencygroup assigned'))
db_cgsnapshots = db.cgsnapshot_create(self._context, updates)
self._from_db_object(self._context, self, db_cgsnapshots)
def from_group_snapshot(self, group_snapshot):
"""Convert a generic volume group object to a cg object."""
self.id = group_snapshot.id
self.consistencygroup_id = group_snapshot.group_id
self.user_id = group_snapshot.user_id
self.project_id = group_snapshot.project_id
self.name = group_snapshot.name
self.description = group_snapshot.description
self.status = group_snapshot.status
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 == 'consistencygroup':
self.consistencygroup = objects.ConsistencyGroup.get_by_id(
self._context, self.consistencygroup_id)
if attrname == 'snapshots':
self.snapshots = objects.SnapshotList.get_all_for_cgsnapshot(
self._context, self.id)
self.obj_reset_changes(fields=[attrname])
def save(self):
updates = self.cinder_obj_get_changes()
if updates:
if 'consistencygroup' in updates:
raise exception.ObjectActionError(
action='save', reason=_('consistencygroup changed'))
if 'snapshots' in updates:
raise exception.ObjectActionError(
action='save', reason=_('snapshots changed'))
db.cgsnapshot_update(self._context, self.id, updates)
self.obj_reset_changes()
def destroy(self):
with self.obj_as_admin():
updated_values = db.cgsnapshot_destroy(self._context, self.id)
self.update(updated_values)
self.obj_reset_changes(updated_values.keys())
@base.CinderObjectRegistry.register
class CGSnapshotList(base.ObjectListBase, base.CinderObject):
VERSION = '1.0'
fields = {
'objects': fields.ListOfObjectsField('CGSnapshot')
}
@classmethod
def get_all(cls, context, filters=None):
cgsnapshots = db.cgsnapshot_get_all(context, filters)
return base.obj_make_list(context, cls(context), objects.CGSnapshot,
cgsnapshots)
@classmethod
def get_all_by_project(cls, context, project_id, filters=None):
cgsnapshots = db.cgsnapshot_get_all_by_project(context, project_id,
filters)
return base.obj_make_list(context, cls(context), objects.CGSnapshot,
cgsnapshots)
@classmethod
def get_all_by_group(cls, context, group_id, filters=None):
cgsnapshots = db.cgsnapshot_get_all_by_group(context, group_id,
filters)
return base.obj_make_list(context, cls(context),
objects.CGSnapshot,
cgsnapshots)