partition can request to update ip route of tap interface

slapos/format.py

@@ -840,8 +840,10 @@ class Tap(object):
     if self.ipv4_addr:
       # Check if this route exits
       code, result = callAndRead(['ip', 'route', 'show', self.ipv4_addr])
-      if code == 0 and self.ipv4_addr in result and self.name in result:
+      if self.ipv4_addr in result:
+        # Skip already configured route
         return
+      code, result = callAndRead(['ip', 'route', 'show'])
       callAndRead(['route', 'add', '-host', self.ipv4_addr, 'dev', self.name])
     else:
       raise ValueError("%s should not be empty. No ipv4 address assigned to %s" %