bgpd: Save memory when using bgp_path_info_extra and vnc

Structure size of bgp_path_info_extra when compiled
with vnc is 184 bytes.  Reduce this size to 72 bytes
when compiled w/ vnc but not necessarily turned
on vnc.

With 2 full bgp feeds this saves aproximately 100mb
when compiling with vnc and not using vnc.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>

1 files changed, 30 insertions, 26 deletions

diff --git a/bgpd/bgp_route.h b/bgpd/bgp_route.h
index 18a60341f7..2d82f0f206 100644
--- a/bgpd/bgp_route.h
+++ b/bgpd/bgp_route.h
@@ -193,33 +193,9 @@ struct bgp_path_info_extra_vrfleak {
 	struct prefix nexthop_orig;
 };
 
-/* Ancillary information to struct bgp_path_info,
- * used for uncommonly used data (aggregation, MPLS, etc.)
- * and lazily allocated to save memory.
- */
-struct bgp_path_info_extra {
-	/* Pointer to dampening structure.  */
-	struct bgp_damp_info *damp_info;
-
-	/** List of aggregations that suppress this path. */
-	struct list *aggr_suppressors;
-
-	/* Nexthop reachability check.  */
-	uint32_t igpmetric;
-
-	/* MPLS label(s) - VNI(s) for EVPN-VxLAN  */
-	mpls_label_t label[BGP_MAX_LABELS];
-	uint32_t num_labels;
-
-	/* timestamp of the rib installation */
-	time_t bgp_rib_uptime;
-
-	/*For EVPN*/
-	struct bgp_path_info_extra_evpn *evpn;
-
 #ifdef ENABLE_BGP_VNC
+struct bgp_path_info_extra_vnc {
 	union {
-
 		struct {
 			void *rfapi_handle; /* export: NVE advertising this
 					       route */
@@ -242,8 +218,36 @@ struct bgp_path_info_extra {
 			struct prefix aux_prefix; /* AFI_L2VPN: the IP addr,
 						     if family set */
 		} import;
-
 	} vnc;
+};
+#endif
+
+/* Ancillary information to struct bgp_path_info,
+ * used for uncommonly used data (aggregation, MPLS, etc.)
+ * and lazily allocated to save memory.
+ */
+struct bgp_path_info_extra {
+	/* Pointer to dampening structure.  */
+	struct bgp_damp_info *damp_info;
+
+	/** List of aggregations that suppress this path. */
+	struct list *aggr_suppressors;
+
+	/* Nexthop reachability check.  */
+	uint32_t igpmetric;
+
+	/* MPLS label(s) - VNI(s) for EVPN-VxLAN  */
+	mpls_label_t label[BGP_MAX_LABELS];
+	uint32_t num_labels;
+
+	/* timestamp of the rib installation */
+	time_t bgp_rib_uptime;
+
+	/*For EVPN*/
+	struct bgp_path_info_extra_evpn *evpn;
+
+#ifdef ENABLE_BGP_VNC
+	struct bgp_path_info_extra_vnc *vnc;
 #endif
 
 	/* For flowspec*/