commit 8269d3dbe70adaae60806d5d84e35f25d23193c5
author Neale Ranns <nranns@cisco.com> Tue Jan 30 09:02:20 2018 -0800
committer Damjan Marion <dmarion.lists@gmail.com> Wed Jan 31 17:42:27 2018 +0000
tree 7e56cd4feed2fffcf8d6791ccc828cae5385d352
parent f2a23cc8602525a325eaeaae6aca5e18882c33da

Improved tracing for the IP[46] not-enabled case.

now we get
00:00:03:665501: pg-input
 ...
00:00:03:665681: ethernet-input
 ...
00:00:03:665691: ip6-input
  UDP: 2001::1 -> ffef::1
    tos 0x00, flow label 0x0, hop limit 64, payload length 108
  UDP: 1234 -> 1234
    length 108, checksum 0x7b25
00:00:03:665695: ip6-not-enabled
    UDP: 2001::1 -> ffef::1
      tos 0x00, flow label 0x0, hop limit 64, payload length 108
    UDP: 1234 -> 1234
      length 108, checksum 0x7b25
00:00:03:665706: error-drop
  ethernet-input: no error

Same goes for IPv4

Change-Id: Ia360df39b43281d3a0aa1b686f04b73cfa37c546
Signed-off-by: Neale Ranns <nranns@cisco.com>

src/vnet/ip/ip4_punt_drop.c

diff --git a/src/vnet/ip/ip4_punt_drop.c b/src/vnet/ip/ip4_punt_drop.c
index 4e74963..3600d7c 100644
--- a/src/vnet/ip/ip4_punt_drop.c
+++ b/src/vnet/ip/ip4_punt_drop.c
@@ -28,7 +28,7 @@
 VNET_FEATURE_ARC_INIT (ip4_drop) =
 {
   .arc_name  = "ip4-drop",
-  .start_nodes = VNET_FEATURES ("ip4-drop"),
+  .start_nodes = VNET_FEATURES ("ip4-drop", "ip4-not-enabled"),
 };
 /* *INDENT-ON* */
 
@@ -187,6 +187,17 @@
 }
 
 static uword
+ip4_not_enabled (vlib_main_t * vm,
+		 vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  if (node->flags & VLIB_NODE_FLAG_TRACE)
+    ip4_forward_next_trace (vm, node, frame, VLIB_TX);
+
+  return ip_drop_or_punt (vm, node, frame,
+			  vnet_feat_arc_ip4_drop.feature_arc_index);
+}
+
+static uword
 ip4_punt (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
 {
   if (node->flags & VLIB_NODE_FLAG_TRACE)
@@ -211,6 +222,20 @@
 
 VLIB_NODE_FUNCTION_MULTIARCH (ip4_drop_node, ip4_drop);
 
+VLIB_REGISTER_NODE (ip4_not_enabled_node, static) =
+{
+  .function = ip4_not_enabled,
+  .name = "ip4-not-enabled",
+  .vector_size = sizeof (u32),
+  .format_trace = format_ip4_forward_next_trace,
+  .n_next_nodes = 1,
+  .next_nodes = {
+    [0] = "error-drop",
+  },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (ip4_not_enabled_node, ip4_not_enabled);
+
 VLIB_REGISTER_NODE (ip4_punt_node, static) =
 {
   .function = ip4_punt,