lib, zebra: add "vrf_id" into the "struct interface"

Later, an interface will belong to a specific VRF. Now we add a
property "vrf_id" to the "struct interface", and keep it as the
default value 0.

This property is shown when displaying interfaces information.
It is also added in some logs.

This is just the preparation to move the interace list into the
"struct vrf". The main logic is not changed.

Signed-off-by: Feng Lu <lu.feng@6wind.com>
Reviewed-by: Alain Ritoux <alain.ritoux@6wind.com>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Vincent JARDIN <vincent.jardin@6wind.com>
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

lib/if.c

@@ -454,12 +454,12 @@ if_dump (const struct interface *ifp)
   struct connected *c __attribute__((unused));
 
   for (ALL_LIST_ELEMENTS_RO (ifp->connected, node, c))
-    zlog_info ("Interface %s index %d metric %d mtu %d "
+    zlog_info ("Interface %s vrf %u index %d metric %d mtu %d "
 #ifdef HAVE_IPV6
                "mtu6 %d "
 #endif /* HAVE_IPV6 */
                "%s",
-               ifp->name, ifp->ifindex, ifp->metric, ifp->mtu, 
+               ifp->name, ifp->vrf_id, ifp->ifindex, ifp->metric, ifp->mtu,
 #ifdef HAVE_IPV6
                ifp->mtu6,
 #endif /* HAVE_IPV6 */
@@ -675,8 +675,8 @@ connected_log (struct connected *connected, char *str)
   ifp = connected->ifp;
   p = connected->address;
 
-  snprintf (logbuf, BUFSIZ, "%s interface %s %s %s/%d ", 
-	    str, ifp->name, prefix_family_str (p),
+  snprintf (logbuf, BUFSIZ, "%s interface %s vrf %u %s %s/%d ",
+	    str, ifp->name, ifp->vrf_id, prefix_family_str (p),
 	    inet_ntop (p->family, &p->u.prefix, buf, BUFSIZ),
 	    p->prefixlen);
 

lib/if.h

@@ -139,6 +139,8 @@ struct interface
 #ifdef HAVE_NET_RT_IFLIST
   struct if_data stats;
 #endif /* HAVE_NET_RT_IFLIST */
+
+  vrf_id_t vrf_id;
 };
 
 /* Connected address structure. */

zebra/interface.c

@@ -381,21 +381,23 @@ if_add_update (struct interface *ifp)
       if (if_data && if_data->shutdown == IF_ZEBRA_SHUTDOWN_ON)
 	{
 	  if (IS_ZEBRA_DEBUG_KERNEL)
-	    zlog_debug ("interface %s index %d is shutdown. Won't wake it up.",
-			ifp->name, ifp->ifindex);
+	    zlog_debug ("interface %s vrf %u index %d is shutdown. "
+			"Won't wake it up.",
+			ifp->name, ifp->vrf_id, ifp->ifindex);
 	  return;
 	}
 
       if_addr_wakeup (ifp);
 
       if (IS_ZEBRA_DEBUG_KERNEL)
-	zlog_debug ("interface %s index %d becomes active.", 
-		    ifp->name, ifp->ifindex);
+	zlog_debug ("interface %s vrf %u index %d becomes active.",
+		    ifp->name, ifp->vrf_id, ifp->ifindex);
     }
   else
     {
       if (IS_ZEBRA_DEBUG_KERNEL)
-	zlog_debug ("interface %s index %d is added.", ifp->name, ifp->ifindex);
+	zlog_debug ("interface %s vrf %u index %d is added.",
+		    ifp->name, ifp->vrf_id, ifp->ifindex);
     }
 }
 
@@ -412,17 +414,17 @@ if_delete_update (struct interface *ifp)
 
   if (if_is_up(ifp))
     {
-      zlog_err ("interface %s index %d is still up while being deleted.",
-	    ifp->name, ifp->ifindex);
+      zlog_err ("interface %s vrf %u index %d is still up while being deleted.",
+                ifp->name, ifp->vrf_id, ifp->ifindex);
       return;
     }
 
   /* Mark interface as inactive */
   UNSET_FLAG (ifp->status, ZEBRA_INTERFACE_ACTIVE);
 
   if (IS_ZEBRA_DEBUG_KERNEL)
-    zlog_debug ("interface %s index %d is now inactive.",
-	       ifp->name, ifp->ifindex);
+    zlog_debug ("interface %s vrf %u index %d is now inactive.",
+                ifp->name, ifp->vrf_id, ifp->ifindex);
 
   /* Delete connected routes from the kernel. */
   if (ifp->connected)
@@ -726,6 +728,8 @@ if_dump_vty (struct vty *vty, struct interface *ifp)
     vty_out (vty, "down%s", VTY_NEWLINE);
   }
 
+  vty_out (vty, "  vrf: %u%s", ifp->vrf_id, VTY_NEWLINE);
+
   if (ifp->desc)
     vty_out (vty, "  Description: %s%s", ifp->desc,
 	     VTY_NEWLINE);