5 files changed, 51 insertions, 1 deletions
diff --git a/src/vnet/l2/l2_bd.h b/src/vnet/l2/l2_bd.h
index 93ed1a8532a..0e070651859 100644
--- a/src/vnet/l2/l2_bd.h
+++ b/src/vnet/l2/l2_bd.h
@@ -34,7 +34,7 @@ typedef struct
   vnet_main_t *vnet_main;
 } bd_main_t;
 
-bd_main_t bd_main;
+extern bd_main_t bd_main;
 
 /* Bridge domain member  */
 
diff --git a/src/vnet/l2/l2_input.c b/src/vnet/l2/l2_input.c
index 26c832adfb1..faed7c7fd76 100644
--- a/src/vnet/l2/l2_input.c
+++ b/src/vnet/l2/l2_input.c
@@ -60,6 +60,29 @@ l2input_get_feat_names (void)
   return l2input_feat_names;
 }
 
+u8 *
+format_l2_input_features (u8 * s, va_list * args)
+{
+  static char *display_names[] = {
+#define _(sym,name) #sym,
+    foreach_l2input_feat
+#undef _
+  };
+  u32 feature_bitmap = va_arg (*args, u32);
+
+  if (feature_bitmap == 0)
+    {
+      s = format (s, "  none configured");
+      return s;
+    }
+
+  feature_bitmap &= ~L2INPUT_FEAT_DROP;	/* Not a feature */
+  int i;
+  for (i = L2INPUT_N_FEAT; i >= 0; i--)
+    if (feature_bitmap & (1 << i))
+      s = format (s, "%10s (%s)\n", display_names[i], l2input_feat_names[i]);
+  return s;
+}
 
 typedef struct
 {
diff --git a/src/vnet/l2/l2_input.h b/src/vnet/l2/l2_input.h
index e6b3bc7f9cd..e8a6c776cef 100644
--- a/src/vnet/l2/l2_input.h
+++ b/src/vnet/l2/l2_input.h
@@ -148,6 +148,8 @@ STATIC_ASSERT ((u64) L2INPUT_VALID_MASK == (1ull << L2INPUT_N_FEAT) - 1, "");
 /** Return an array of strings containing graph node names of each feature */
 char **l2input_get_feat_names (void);
 
+/* arg0 - u32 feature_bitmap */
+u8 *format_l2_input_features (u8 * s, va_list * args);
 
 static_always_inline u8
 bd_feature_flood (l2_bridge_domain_t * bd_config)
diff --git a/src/vnet/l2/l2_output.c b/src/vnet/l2/l2_output.c
index fbee590c944..500fc5d0e95 100644
--- a/src/vnet/l2/l2_output.c
+++ b/src/vnet/l2/l2_output.c
@@ -40,6 +40,29 @@ l2output_get_feat_names (void)
   return l2output_feat_names;
 }
 
+u8 *
+format_l2_output_features (u8 * s, va_list * args)
+{
+  static char *display_names[] = {
+#define _(sym,name) #sym,
+    foreach_l2output_feat
+#undef _
+  };
+  u32 feature_bitmap = va_arg (*args, u32);
+
+  if (feature_bitmap == 0)
+    {
+      s = format (s, "  none configured");
+      return s;
+    }
+
+  int i;
+  for (i = L2OUTPUT_N_FEAT - 1; i >= 0; i--)
+    if (feature_bitmap & (1 << i))
+      s = format (s, "%10s (%s)\n", display_names[i], l2output_feat_names[i]);
+  return s;
+}
+
 l2output_main_t l2output_main;
 
 typedef struct
diff --git a/src/vnet/l2/l2_output.h b/src/vnet/l2/l2_output.h
index a54b8d67c93..1a73fdf9790 100644
--- a/src/vnet/l2/l2_output.h
+++ b/src/vnet/l2/l2_output.h
@@ -141,6 +141,8 @@ typedef enum
 /* Return an array of strings containing graph node names of each feature */
 char **l2output_get_feat_names (void);
 
+/* arg0 - u32 feature_bitmap */
+u8 *format_l2_output_features (u8 * s, va_list * args);
 
 /**
  * The next set of functions is for use by output feature graph nodes.