Relocate Geneve DB models

To avoid cyclic imports for OVO work.

Change-Id: Iebd5a44d2195276e92111cb8964b90fc2955e2de
Partial-Bug: #1597913

neutron/db/migration/models/head.py

@@ -50,7 +50,6 @@ from neutron.db import segments_db  # noqa
 from neutron.db import servicetype_db  # noqa
 from neutron.db import tag_db  # noqa
 from neutron.ipam.drivers.neutrondb_ipam import db_models  # noqa
-from neutron.plugins.ml2.drivers import type_geneve  # noqa
 from neutron.plugins.ml2 import models as ml2_models  # noqa
 from neutron.services.auto_allocate import models as aa_models  # noqa
 from neutron.services.segments import db  # noqa

neutron/db/models/plugins/ml2/geneveallocation.py

@@ -0,0 +1,42 @@
+#    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 sqlalchemy as sa
+from sqlalchemy import sql
+
+from neutron_lib.db import model_base
+
+
+class GeneveAllocation(model_base.BASEV2):
+
+    __tablename__ = 'ml2_geneve_allocations'
+
+    geneve_vni = sa.Column(sa.Integer, nullable=False, primary_key=True,
+                        autoincrement=False)
+    allocated = sa.Column(sa.Boolean, nullable=False, default=False,
+                          server_default=sql.false(), index=True)
+
+
+class GeneveEndpoints(model_base.BASEV2):
+    """Represents tunnel endpoint in RPC mode."""
+
+    __tablename__ = 'ml2_geneve_endpoints'
+    __table_args__ = (
+        sa.UniqueConstraint('host',
+                            name='unique_ml2_geneve_endpoints0host'),
+        model_base.BASEV2.__table_args__
+    )
+    ip_address = sa.Column(sa.String(64), primary_key=True)
+    host = sa.Column(sa.String(255), nullable=True)
+
+    def __repr__(self):
+        return "<GeneveTunnelEndpoint(%s)>" % self.ip_address

neutron/plugins/ml2/drivers/type_geneve.py

@@ -13,19 +13,23 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-from neutron_lib.db import model_base
+
 from neutron_lib import exceptions as n_exc
 from oslo_config import cfg
 from oslo_log import log
-import sqlalchemy as sa
-from sqlalchemy import sql
 
 from neutron._i18n import _, _LE
+from neutron.common import _deprecate
+from neutron.db.models.plugins.ml2 import geneveallocation \
+     as geneve_model
 from neutron.plugins.common import constants as p_const
 from neutron.plugins.ml2.drivers import type_tunnel
 
 LOG = log.getLogger(__name__)
 
+_deprecate._moved_global('GeneveAllocation', new_module=geneve_model)
+_deprecate._moved_global('GeneveEndpoints', new_module=geneve_model)
+
 geneve_opts = [
     cfg.ListOpt('vni_ranges',
                 default=[],
@@ -47,37 +51,11 @@ geneve_opts = [
 cfg.CONF.register_opts(geneve_opts, "ml2_type_geneve")
 
 
-class GeneveAllocation(model_base.BASEV2):
-
-    __tablename__ = 'ml2_geneve_allocations'
-
-    geneve_vni = sa.Column(sa.Integer, nullable=False, primary_key=True,
-                        autoincrement=False)
-    allocated = sa.Column(sa.Boolean, nullable=False, default=False,
-                          server_default=sql.false(), index=True)
-
-
-class GeneveEndpoints(model_base.BASEV2):
-    """Represents tunnel endpoint in RPC mode."""
-
-    __tablename__ = 'ml2_geneve_endpoints'
-    __table_args__ = (
-        sa.UniqueConstraint('host',
-                            name='unique_ml2_geneve_endpoints0host'),
-        model_base.BASEV2.__table_args__
-    )
-    ip_address = sa.Column(sa.String(64), primary_key=True)
-    host = sa.Column(sa.String(255), nullable=True)
-
-    def __repr__(self):
-        return "<GeneveTunnelEndpoint(%s)>" % self.ip_address
-
-
 class GeneveTypeDriver(type_tunnel.EndpointTunnelTypeDriver):
 
     def __init__(self):
-        super(GeneveTypeDriver, self).__init__(GeneveAllocation,
-                                               GeneveEndpoints)
+        super(GeneveTypeDriver, self).__init__(geneve_model.GeneveAllocation,
+                                               geneve_model.GeneveEndpoints)
         self.max_encap_size = cfg.CONF.ml2_type_geneve.max_header_size
 
     def get_type(self):
@@ -104,3 +82,5 @@ class GeneveTypeDriver(type_tunnel.EndpointTunnelTypeDriver):
     def get_mtu(self, physical_network=None):
         mtu = super(GeneveTypeDriver, self).get_mtu()
         return mtu - self.max_encap_size if mtu else 0
+
+_deprecate._MovedGlobals()