Carry 'tome' flag across flow queue enqueue and flush

If a packet is routed and the routing decision points to a nexthop
with policy, the packets that are enqueued in the flow entry has
to be routed (and not bridged) when they are flushed from the entry.
To do that, fmd_to_me flag has to be carried across enqueue and
flush.

Closes BUG: #1406873

Change-Id: Ie6b6d545abe814bfab7e6df35e53b1229984a92c

dp-core/vr_bridge.c

@@ -420,7 +420,6 @@ vr_bridge_input(struct vrouter *router, struct vr_packet *pkt,
 
     /* Adjust MSS for V4 and V6 packets */
     if ((pkt->vp_type == VP_TYPE_IP) || (pkt->vp_type == VP_TYPE_IP6)) {
-
         pull_len = pkt_get_network_header_off(pkt) - pkt_head_space(pkt);
         if (!pkt_pull(pkt, pull_len)) {
             vr_pfree(pkt, VP_DROP_PULL);

dp-core/vr_flow.c

@@ -474,6 +474,8 @@ vr_enqueue_flow(struct vrouter *router, struct vr_flow_entry *fe,
     if (fmd) {
         pnode->pl_outer_src_ip = fmd->fmd_outer_src_ip;
         pnode->pl_label = fmd->fmd_label;
+        if (fmd->fmd_to_me)
+            pnode->pl_flags |= PN_FLAG_TO_ME;
     }
 
     __sync_synchronize();
@@ -804,6 +806,8 @@ vr_flush_flow_queue(struct vrouter *router, struct vr_flow_entry *fe,
             memset(fmd, 0, sizeof(*fmd));
             fmd->fmd_outer_src_ip = pnode->pl_outer_src_ip;
             fmd->fmd_label = pnode->pl_label;
+            if (pnode->pl_flags & PN_FLAG_TO_ME)
+                fmd->fmd_to_me = 1;
         }
 
         pkt = pnode->pl_packet;

include/vr_flow.h

@@ -142,6 +142,7 @@ struct vr_flow_stats {
 #define VR_MAX_FLOW_QUEUE_ENTRIES   3U
 
 #define PN_FLAG_LABEL_IS_VNID       0x1
+#define PN_FLAG_TO_ME               0x2
 
 struct vr_packet_node {
     struct vr_packet *pl_packet;