contrail raises wrong quota exception

I added a new exception named OverQuota to raise on
quota hit.Also added new status code 412 to catch
and raise new quota exception.I also have path in
contrail-neutron-plugin to catch this new OverQuota
exception.

Change-Id: I02fdf80b04999f995ab34d00c4d18605648229d6
Closes-Bug: #1590930

src/api-lib/vnc_api.py

@@ -544,6 +544,8 @@ def _request(self, op, url, data=None, retry_on_error=True,
                                 % (op, url, data, content))
             elif status == 403:
                 raise PermissionDenied(content)
+            elif status == 412:
+                raise OverQuota(content)
             elif status == 409:
                 raise RefsExistError(content)
             elif status == 504:

src/config/api-server/vnc_cfg_types.py

@@ -572,7 +572,7 @@ def http_put(cls, id, fq_name, obj_dict, db_conn):
         (ok, result) = cls.addr_mgmt.net_check_subnet_quota(read_result,
                                                             obj_dict, db_conn)
         if not ok:
-            return (ok, (403, result))
+            return (ok, (vnc_quota.QUOTA_OVER_ERROR_CODE, result))
         (ok, result) = cls.addr_mgmt.net_check_subnet_overlap(read_result,
                                                               obj_dict)
         if not ok:
@@ -1116,7 +1116,7 @@ def http_put(cls, id, fq_name, obj_dict, db_conn):
                 (ok, quota_limit) = QuotaHelper.check_quota_limit(
                                         proj_dict, obj_type, rule_count-1)
                 if not ok:
-                    return (False, (403, pformat(fq_name) + ' : ' + quota_limit))
+                    return (False, (vnc_quota.QUOTA_OVER_ERROR_CODE, pformat(fq_name) + ' : ' + quota_limit))
 
         return _check_policy_rules(obj_dict.get('security_group_entries'))
     # end http_put
@@ -1364,7 +1364,7 @@ def http_post_collection(cls, tenant_name, obj_dict, db_conn):
         (ok, quota_limit) = QuotaHelper.check_quota_limit(
             proj_dict, 'loadbalancer-member', quota_count)
         if not ok:
-            return (False, (403, pformat(fq_name) + ' : ' + quota_limit))
+            return (False, (vnc_quota.QUOTA_OVER_ERROR_CODE, pformat(fq_name) + ' : ' + quota_limit))
 
         return True, ""
 

src/config/api-server/vnc_quota.py

@@ -4,6 +4,7 @@
 from pprint import pformat
 import cfgm_common.exceptions
 
+QUOTA_OVER_ERROR_CODE = 412
 
 class QuotaHelper(object):
 
@@ -82,6 +83,6 @@ def verify_quota_for_resource(cls, db_conn, resource, obj_type,
         if quota_count >= quota_limit:
             msg = ('quota limit (%d) exceeded for resource %s'
                    % (quota_limit, obj_type))
-            return (False, (403, pformat(fq_name) + ' : ' + msg))
+            return (False, (QUOTA_OVER_ERROR_CODE, pformat(fq_name) + ' : ' + msg))
 
         return True, ""

src/config/common/exceptions.py

@@ -108,6 +108,9 @@ class PermissionDenied(VncError):
     pass
 # end class PermissionDenied
 
+class OverQuota(VncError):
+    pass
+# end class OverQuota
 
 class RefsExistError(VncError):
     pass

src/config/vnc_openstack/vnc_openstack/neutron_plugin_db.py

@@ -217,6 +217,9 @@ def _security_group_rule_create(self, sg_id, sg_rule):
         except PermissionDenied as e:
             self._raise_contrail_exception('BadRequest',
                 resource='security_group_rule', msg=str(e))
+        except OverQuota as e:
+            self._raise_contrail_exception('OverQuota',
+                resource='security_group_rule', msg=str(e))
         return
     #end _security_group_rule_create
 
@@ -279,16 +282,19 @@ def _route_table_delete(self, rt_id):
     def _resource_create(self, resource_type, obj):
         create_method = getattr(self._vnc_lib, resource_type + '_create')
         try:
-            obj_uuid = create_method(obj)
-        except RefsExistError:
-            obj.uuid = str(uuid.uuid4())
-            obj.name += '-' + obj.uuid
-            obj.fq_name[-1] += '-' + obj.uuid
-            obj_uuid = create_method(obj)
+            try:
+                obj_uuid = create_method(obj)
+            except RefsExistError:
+                obj.uuid = str(uuid.uuid4())
+                obj.name += '-' + obj.uuid
+                obj.fq_name[-1] += '-' + obj.uuid
+                obj_uuid = create_method(obj)
         except (PermissionDenied, BadRequest) as e:
             self._raise_contrail_exception('BadRequest',
                 resource=resource_type, msg=str(e))
-
+        except OverQuota as e:
+            self._raise_contrail_exception('OverQuota',
+                resource=resource_type, msg=str(e))
         return obj_uuid
     #end _resource_create
 
@@ -3426,6 +3432,9 @@ def floatingip_create(self, context, fip_q):
                                            resource='floatingip', msg=msg)
         try:
             fip_uuid = self._vnc_lib.floating_ip_create(fip_obj)
+        except OverQuota as e:
+            self._raise_contrail_exception('OverQuota',
+                resource='floatingip', msg=str(e))
         except Exception as e:
             self._raise_contrail_exception('IpAddressGenerationFailure',
                                            net_id=fip_q['floating_network_id'])