A bit of buffer metadata reshuffling to accommodate flow_id

Change-Id: I2794384557c6272fe217269b14a9db09eda19220
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vnet/feature/feature.h b/src/vnet/feature/feature.h
index f6b1d12..ce9e2ca 100644
--- a/src/vnet/feature/feature.h
+++ b/src/vnet/feature/feature.h
@@ -204,7 +204,7 @@
 
   if (PREDICT_FALSE (vnet_have_features (arc, sw_if_index)))
     {
-      b->feature_arc_index = arc;
+      vnet_buffer (b)->feature_arc_index = arc;
       b->current_config_index =
 	vec_elt (cm->config_index_by_sw_if_index, sw_if_index);
       return vnet_get_config_data (&cm->config_main, &b->current_config_index,
@@ -225,7 +225,7 @@
 			     vlib_buffer_t * b0, u32 n_data_bytes)
 {
   vnet_feature_main_t *fm = &feature_main;
-  u8 arc = b0->feature_arc_index;
+  u8 arc = vnet_buffer (b0)->feature_arc_index;
   vnet_feature_config_main_t *cm = &fm->feature_config_mains[arc];
 
   return vnet_get_config_data (&cm->config_main,
@@ -270,7 +270,7 @@
       vnet_buffer (b0)->device_input_feat.buffer_advance = adv;
       vlib_buffer_advance (b0, -adv);
 
-      b0->feature_arc_index = feature_arc_index;
+      vnet_buffer (b0)->feature_arc_index = feature_arc_index;
       b0->current_config_index =
 	vec_elt (cm->config_index_by_sw_if_index, sw_if_index);
       vnet_get_config_data (&cm->config_main, &b0->current_config_index,
@@ -309,8 +309,8 @@
       vnet_buffer (b1)->device_input_feat.buffer_advance = adv;
       vlib_buffer_advance (b1, -adv);
 
-      b0->feature_arc_index = feature_arc_index;
-      b1->feature_arc_index = feature_arc_index;
+      vnet_buffer (b0)->feature_arc_index = feature_arc_index;
+      vnet_buffer (b1)->feature_arc_index = feature_arc_index;
       b0->current_config_index =
 	vec_elt (cm->config_index_by_sw_if_index, sw_if_index);
       b1->current_config_index = b0->current_config_index;
@@ -366,10 +366,10 @@
       vnet_buffer (b3)->device_input_feat.buffer_advance = adv;
       vlib_buffer_advance (b3, -adv);
 
-      b0->feature_arc_index = feature_arc_index;
-      b1->feature_arc_index = feature_arc_index;
-      b2->feature_arc_index = feature_arc_index;
-      b3->feature_arc_index = feature_arc_index;
+      vnet_buffer (b0)->feature_arc_index = feature_arc_index;
+      vnet_buffer (b1)->feature_arc_index = feature_arc_index;
+      vnet_buffer (b2)->feature_arc_index = feature_arc_index;
+      vnet_buffer (b3)->feature_arc_index = feature_arc_index;
 
       b0->current_config_index =
 	vec_elt (cm->config_index_by_sw_if_index, sw_if_index);