Add adjacency counters to the stats segment

Change-Id: I6b59df939c9daf40e261d73d19f500bd90abe6ff
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>

4 files changed, 34 insertions, 6 deletions

diff --git a/src/vnet/ip/ip.api b/src/vnet/ip/ip.api
index 71ad1c189c1..5cd0dfaac54 100644
--- a/src/vnet/ip/ip.api
+++ b/src/vnet/ip/ip.api
@@ -120,12 +120,15 @@ define ip_neighbor_dump
 /** \brief IP neighboors dump response
     @param context - sender context which was passed in the request
     @param sw_if_index - The interface used to reach the neighbor
+    @param stats_index - An index in the stats segment that can be used to read
+                         the counters for this neighbour.
     @param is_static - [1|0] to indicate if neighbor is statically configured
     @param is_ipv6 - [1|0] to indicate if address family is ipv[6|4]
 */
 define ip_neighbor_details {
     u32 context;
     u32 sw_if_index;
+    u32 stats_index;
     u8  is_static;
     u8  is_ipv6;
     u8  mac_address[6];
@@ -146,7 +149,7 @@ define ip_neighbor_details {
     @param mac_address - l2 address of the neighbor
     @param dst_address - ip4 or ip6 address of the neighbor
 */
-autoreply define ip_neighbor_add_del
+define ip_neighbor_add_del
 {
   u32 client_index;
   u32 context;
@@ -160,6 +163,13 @@ autoreply define ip_neighbor_add_del
   u8 dst_address[16];
 };
 
+define ip_neighbor_add_del_reply
+{
+  u32 context;
+  i32 retval;
+  u32 stats_index;
+};
+
 /** \brief Set the ip flow hash config for a fib request
     @param client_index - opaque cookie to identify the sender
     @param context - sender context, to match reply w/ request
diff --git a/src/vnet/ip/ip_api.c b/src/vnet/ip/ip_api.c
index 5dbc02d5c59..b0a7e82949b 100644
--- a/src/vnet/ip/ip_api.c
+++ b/src/vnet/ip/ip_api.c
@@ -659,6 +659,7 @@ vl_api_ip_neighbor_add_del_t_handler (vl_api_ip_neighbor_add_del_t * mp,
   ip46_address_t ip = ip46_address_initializer;
   vl_api_ip_neighbor_add_del_reply_t *rmp;
   ip_neighbor_flags_t flags;
+  u32 stats_index = ~0;
   int rv = 0;
 
   VALIDATE_SW_IF_INDEX (mp);
@@ -678,14 +679,20 @@ vl_api_ip_neighbor_add_del_t_handler (vl_api_ip_neighbor_add_del_t * mp,
 
   if (mp->is_add)
     rv = ip_neighbor_add (&ip, mp->is_ipv6, mp->mac_address,
-			  ntohl (mp->sw_if_index), flags);
+			  ntohl (mp->sw_if_index), flags, &stats_index);
   else
     rv = ip_neighbor_del (&ip, mp->is_ipv6, ntohl (mp->sw_if_index));
 
   stats_dsunlock ();
 
   BAD_SW_IF_INDEX_LABEL;
-  REPLY_MACRO (VL_API_IP_NEIGHBOR_ADD_DEL_REPLY);
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2 (VL_API_IP_NEIGHBOR_ADD_DEL_REPLY,
+  ({
+    rmp->stats_index = htonl (stats_index);
+  }));
+  /* *INDENT-ON* */
 }
 
 void
diff --git a/src/vnet/ip/ip_neighbor.c b/src/vnet/ip/ip_neighbor.c
index 2edd737aa07..f5a816d5a18 100644
--- a/src/vnet/ip/ip_neighbor.c
+++ b/src/vnet/ip/ip_neighbor.c
@@ -50,8 +50,12 @@ static ip_neighbor_scan_config_t ip_neighbor_scan_conf;
 int
 ip_neighbor_add (const ip46_address_t * ip,
 		 u8 is_ip6,
-		 const u8 * mac, u32 sw_if_index, ip_neighbor_flags_t flags)
+		 const u8 * mac,
+		 u32 sw_if_index,
+		 ip_neighbor_flags_t flags, u32 * stats_index)
 {
+  fib_protocol_t fproto;
+  vnet_link_t linkt;
   int rv;
 
   /*
@@ -66,7 +70,8 @@ ip_neighbor_add (const ip46_address_t * ip,
 					   (flags & IP_NEIGHBOR_FLAG_STATIC),
 					   (flags &
 					    IP_NEIGHBOR_FLAG_NO_ADJ_FIB));
-
+      fproto = FIB_PROTOCOL_IP6;
+      linkt = VNET_LINK_IP6;
     }
   else
     {
@@ -82,8 +87,13 @@ ip_neighbor_add (const ip46_address_t * ip,
 					   (flags & IP_NEIGHBOR_FLAG_STATIC),
 					   (flags &
 					    IP_NEIGHBOR_FLAG_NO_ADJ_FIB));
+      fproto = FIB_PROTOCOL_IP4;
+      linkt = VNET_LINK_IP4;
     }
 
+  if (0 == rv && stats_index)
+    *stats_index = adj_nbr_find (fproto, linkt, ip, sw_if_index);
+
   return (rv);
 }
 
diff --git a/src/vnet/ip/ip_neighbor.h b/src/vnet/ip/ip_neighbor.h
index b865862c06e..9eeebdb1555 100644
--- a/src/vnet/ip/ip_neighbor.h
+++ b/src/vnet/ip/ip_neighbor.h
@@ -45,7 +45,8 @@ typedef enum ip_neighbor_flags_t_
 extern int ip_neighbor_add (const ip46_address_t * ip,
 			    u8 is_ip6,
 			    const u8 * mac,
-			    u32 sw_if_index, ip_neighbor_flags_t flags);
+			    u32 sw_if_index,
+			    ip_neighbor_flags_t flags, u32 * stats_index);
 
 extern int ip_neighbor_del (const ip46_address_t * ip,
 			    u8 is_ip6, u32 sw_if_index);