bridge: T2232: prevent deletion of enslaved interfaces

Interfaces enslaved to a bridge are not allowed to be deleted. If an interface
is deleted from the config but it is still enslaved to a bridge will cause a
configuration error on the subsequent boot.

1 files changed, 9 insertions, 2 deletions

diff --git a/src/conf_mode/interfaces-vxlan.py b/src/conf_mode/interfaces-vxlan.py
index 1f9636729..b9bfb242a 100755
--- a/src/conf_mode/interfaces-vxlan.py
+++ b/src/conf_mode/interfaces-vxlan.py
@@ -18,11 +18,12 @@ import os
 
 from sys import exit
 from copy import deepcopy
+from netifaces import interfaces
 
 from vyos.config import Config
 from vyos.ifconfig import VXLANIf, Interface
+from vyos.util import is_bridge_member
 from vyos import ConfigError
-from netifaces import interfaces
 
 default_config_data = {
     'address': [],
@@ -148,7 +149,13 @@ def get_config():
 
 def verify(vxlan):
     if vxlan['deleted']:
-        # bail out early
+        interface = vxlan['intf']
+        is_member, bridge = is_bridge_member(interface)
+        if is_member:
+            # can not use a f'' formatted-string here as bridge would not get
+            # expanded in the print statement
+            raise ConfigError('Can not delete interface "{0}" as it ' \
+                              'is a member of bridge "{1}"!'.format(interface, bridge))
         return None
 
     if vxlan['mtu'] < 1500: