addons: warn or ignore if IP address is assigned to an enslaved interface

Ticket: CM-11967
Reviewed By: Roopa, Daniel W, Nikhil G
Testing Done: ifupdown2-tests

Signed-off-by: Julien Fortin <julien@cumulusnetworks.com>

addons/address.py

@@ -98,6 +98,15 @@ class address(moduleBase):
         if self.max_mtu:
             self.logger.info('address: using max mtu %s' %self.max_mtu)
 
+    def syntax_check(self, ifaceobj, ifaceobj_func=None):
+        return (self.syntax_check_multiple_gateway(ifaceobj)
+                and self.syntax_check_addr_allowed_on(ifaceobj, True))
+
+    def syntax_check_addr_allowed_on(self, ifaceobj, syntax_check=False):
+        if ifaceobj.get_attr_value('address'):
+            return utils.is_addr_ip_allowed_on(ifaceobj, syntax_check=syntax_check)
+        return True
+
     def _syntax_check_multiple_gateway(self, family, found, addr, type_obj):
         if type(IPNetwork(addr)) == type_obj:
             if found:
@@ -106,7 +115,7 @@ class address(moduleBase):
             return True
         return False
 
-    def syntax_check(self, ifaceobj, ifaceobj_func=None):
+    def syntax_check_multiple_gateway(self, ifaceobj):
         result = True
         inet = False
         inet6 = False
@@ -179,15 +188,8 @@ class address(moduleBase):
             if not addrs:
                 continue
 
-            if (((ifaceobj.role & ifaceRole.SLAVE) and
-                not (ifaceobj.link_privflags & ifaceLinkPrivFlags.VRF_SLAVE)) or
-                ((ifaceobj.link_kind & ifaceLinkKind.BRIDGE) and
-                 (ifaceobj.link_privflags & ifaceLinkPrivFlags.BRIDGE_VLAN_AWARE))):
-                # we must not configure an IP address if the interface is
-                # enslaved or is a VLAN AWARE BRIDGE
-                self.logger.info('%s: ignoring ip address. Interface is '
-                                 'enslaved or a vlan aware bridge and cannot'
-                                 ' have an IP Address' %(ifaceobj.name))
+            if not self.syntax_check_addr_allowed_on(ifaceobj,
+                                                     syntax_check=False):
                 return (False, newaddrs, newaddr_attrs)
             # If user address is not in CIDR notation, convert them to CIDR
             for addr_index in range(0, len(addrs)):

addons/dhcp.py

@@ -27,6 +27,14 @@ class dhcp(moduleBase):
         self.dhclientcmd = dhclient(**kargs)
         self.ipcmd = None
 
+    def syntax_check(self, ifaceobj, ifaceobj_getfunc):
+        return self.is_dhcp_allowed_on(ifaceobj, syntax_check=True)
+
+    def is_dhcp_allowed_on(self, ifaceobj, syntax_check):
+        if ifaceobj.addr_method and 'dhcp' in ifaceobj.addr_method:
+            return utils.is_addr_ip_allowed_on(ifaceobj, syntax_check=True)
+        return True
+
     def _up(self, ifaceobj):
         # if dhclient is already running do not stop and start it
         if self.dhclientcmd.is_running(ifaceobj.name) or \
@@ -162,6 +170,8 @@ class dhcp(moduleBase):
                 return
         except:
             return
+        if not self.is_dhcp_allowed_on(ifaceobj, syntax_check=False):
+            return
         self._init_command_handlers()
         if operation == 'query-checkcurr':
             op_handler(self, ifaceobj, query_ifaceobj)

ifupdown/utils.py

@@ -19,6 +19,8 @@ import ifupdownflags
 from functools import partial
 from ipaddr import IPNetwork, IPAddress
 
+from ifupdown.iface import *
+
 def signal_handler_f(ps, sig, frame):
     if ps:
         ps.send_signal(sig)
@@ -210,6 +212,33 @@ class utils():
                 cls.logger.warning('%s: %s' % (ifacename, e))
             return ipaddrs
 
+    @classmethod
+    def is_addr_ip_allowed_on(cls, ifaceobj, syntax_check=False):
+        msg = ('%s: ignoring ip address. Assigning an IP '
+               'address is not allowed on' % ifaceobj.name)
+        if (ifaceobj.role & ifaceRole.SLAVE
+                and not (ifaceobj.link_privflags & ifaceLinkPrivFlags.VRF_SLAVE)):
+            up = None
+            if ifaceobj.upperifaces:
+                up = ifaceobj.upperifaces[0]
+            msg = ('%s enslaved interfaces. %s'
+                   % (msg, ('%s is enslaved to %s'
+                            % (ifaceobj.name, up)) if up else '')).strip()
+            if syntax_check:
+                cls.logger.warning(msg)
+            else:
+                cls.logger.info(msg)
+            return False
+        elif (ifaceobj.link_kind & ifaceLinkKind.BRIDGE
+                and ifaceobj.link_privflags & ifaceLinkPrivFlags.BRIDGE_VLAN_AWARE):
+            msg = '%s bridge vlan aware interfaces'
+            if syntax_check:
+                cls.logger.warning(msg)
+            else:
+                cls.logger.info(msg)
+            return False
+        return True
+
     @classmethod
     def _execute_subprocess(cls, cmd,
                             env=None,