vlib: autogenerate <node> before <last-in-arc> constraints

[vpp.git] / src / vnet / feature / registration.c

diff --git a/src/vnet/feature/registration.c b/src/vnet/feature/registration.c
index fb10fbb..030486a 100644 (file)
--- a/src/vnet/feature/registration.c
+++ b/src/vnet/feature/registration.c
@@ -122,6 +122,7 @@ vnet_feature_arc_init (vlib_main_t * vm,
                       vnet_config_main_t * vcm,
                       char **feature_start_nodes,
                       int num_feature_start_nodes,
+                      char *last_in_arc,
                       vnet_feature_registration_t * first_reg,
                       vnet_feature_constraint_registration_t *
                       first_const_set, char ***in_feature_nodes)
@@ -154,6 +155,27 @@ vnet_feature_arc_init (vlib_main_t * vm,
 
   this_reg = first_reg;
 
+  /* Autogenerate <node> before <last-in-arc> constraints */
+  if (last_in_arc)
+    {
+      while (this_reg)
+       {
+         /* If this isn't the last node in the arc... */
+         if (clib_strcmp (this_reg->node_name, last_in_arc))
+           {
+             /*
+              * Add an explicit constraint so this feature will run
+              * before the last node in the arc
+              */
+             constraint_tuple = format (0, "%s,%s%c", this_reg->node_name,
+                                        last_in_arc, 0);
+             vec_add1 (constraints, constraint_tuple);
+           }
+         this_reg = this_reg->next_in_arc;
+       }
+      this_reg = first_reg;
+    }
+
   /* pass 1, collect feature node names, construct a before b pairs */
   while (this_reg)
     {