Subnet segment_id writable extension

To enable the possibility to migrate a non-routed network to a
routed network allow updating the segment_id of a subnet.

Change-Id: Iffda823a149a1143f46ee9a05e9640b34bf42c51
Partial-Bug: #1692490

neutron_lib/api/definitions/__init__.py

@@ -67,6 +67,7 @@ from neutron_lib.api.definitions import servicetype
 from neutron_lib.api.definitions import sorting
 from neutron_lib.api.definitions import subnet
 from neutron_lib.api.definitions import subnet_onboard
+from neutron_lib.api.definitions import subnet_segmentid_writable
 from neutron_lib.api.definitions import subnetpool
 from neutron_lib.api.definitions import trunk
 from neutron_lib.api.definitions import trunk_details
@@ -131,6 +132,7 @@ _ALL_API_DEFINITIONS = {
     sorting,
     subnet,
     subnet_onboard,
+    subnet_segmentid_writable,
     subnetpool,
     trunk,
     trunk_details,

neutron_lib/api/definitions/base.py

@@ -110,6 +110,7 @@ KNOWN_EXTENSIONS = (
     'router',
     'router_availability_zone',
     'security-group',
+    'segment',
     'service-type',
     'sorting',
     'standard-attr-description',
@@ -117,6 +118,7 @@ KNOWN_EXTENSIONS = (
     'standard-attr-timestamp',
     'subnet_allocation',
     'subnet_onboard',
+    'subnet-segmentid-writable',
     'tag',
     'trunk',
     'trunk-details',

neutron_lib/api/definitions/subnet_segmentid_writable.py

@@ -0,0 +1,80 @@
+# 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.
+
+from neutron_lib.api.definitions import segment
+from neutron_lib.api.definitions import subnet
+
+
+# The alias of the extension.
+ALIAS = 'subnet-segmentid-writable'
+
+# The label to lookup the plugin in the plugin directory. It can match the
+# alias, as required.
+LABEL = ALIAS
+
+# Whether or not this extension is simply signaling behavior to the user
+# or it actively modifies the attribute map.
+IS_SHIM_EXTENSION = False
+
+# Whether the extension is marking the adoption of standardattr model for
+# legacy resources, or introducing new standardattr attributes. False or
+# None if the standardattr model is adopted since the introduction of
+# resource extension.
+# If this is True, the alias for the extension should be prefixed with
+# 'standard-attr-'.
+IS_STANDARD_ATTR_EXTENSION = False
+
+# The name of the extension.
+NAME = 'Subnet SegmentID (writable)'
+
+# A prefix for API resources. An empty prefix means that the API is going
+# to be exposed at the v2/ level as any other core resource.
+API_PREFIX = ''
+
+# The description of the extension.
+DESCRIPTION = (
+    "Provides a writable segment_id attribute for a subnet resource.")
+
+# A timestamp of when the extension was introduced.
+UPDATED_TIMESTAMP = "2018-03-12T00:00:00-00:00"
+
+
+RESOURCE_ATTRIBUTE_MAP = {
+    subnet.COLLECTION_NAME: {
+        segment.SEGMENT_ID: {'allow_post': True, 'allow_put': True,
+                             'default': None,
+                             'validate': {'type:uuid_or_none': None},
+                             'is_visible': True}
+    }
+}
+
+# The subresource attribute map for the extension. It adds child resources
+# to main extension's resource. The subresource map must have a parent and
+# a parameters entry. If an extension does not need such a map, None can
+# be specified (mandatory).
+SUB_RESOURCE_ATTRIBUTE_MAP = {}
+
+# The action map: it associates verbs with methods to be performed on
+# the API resource.
+ACTION_MAP = {}
+
+# The action status.
+ACTION_STATUS = {
+}
+
+# The list of required extensions.
+REQUIRED_EXTENSIONS = [segment.ALIAS]
+
+# The list of optional extensions.
+OPTIONAL_EXTENSIONS = []

neutron_lib/tests/unit/api/definitions/test_subnet_segmentid_writable.py

@@ -0,0 +1,20 @@
+#    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 neutron_lib.api.definitions import segment
+from neutron_lib.api.definitions import subnet_segmentid_writable
+from neutron_lib.tests.unit.api.definitions import base
+
+
+class SubnetSegmentIDDefinitionTestCase(base.DefinitionBaseTestCase):
+    extension_module = subnet_segmentid_writable
+    extension_attributes = (segment.SEGMENT_ID,)

releasenotes/notes/subnet_segmentid_writable-e28a85033272f05d.yaml

@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Make ``segment_id`` of subnet resource writable. Enables the possibility to
+    migrate a non-routed network to a routed network.