Add an external function to unlink a netgraph type from the types list.

2 files changed, 21 insertions, 0 deletions

diff --git a/sys/netgraph/netgraph.h b/sys/netgraph/netgraph.h
index c1f03ce8686b..33fcfb048c70 100644
--- a/sys/netgraph/netgraph.h
+++ b/sys/netgraph/netgraph.h
@@ -1123,6 +1123,7 @@ item_p	ng_package_msg_self(node_p here, hook_p hook, struct ng_mesg *msg);
 void	ng_replace_retaddr(node_p here, item_p item, ng_ID_t retaddr);
 int	ng_rmhook_self(hook_p hook);	/* if a node wants to kill a hook */
 int	ng_rmnode_self(node_p here);	/* if a node wants to suicide */
+int	ng_rmtype(struct ng_type *tp);
 int	ng_snd_item(item_p item, int queue);
 int 	ng_send_fn(node_p node, hook_p hook, ng_item_fn *fn,
 	void *arg1, int arg2);
diff --git a/sys/netgraph/ng_base.c b/sys/netgraph/ng_base.c
index 6cba23b3c473..553193b99c39 100644
--- a/sys/netgraph/ng_base.c
+++ b/sys/netgraph/ng_base.c
@@ -1167,6 +1167,26 @@ ng_newtype(struct ng_type *tp)
 }
 
 /*
+ * unlink a netgraph type
+ * If no examples exist
+ */
+int
+ng_rmtype(struct ng_type *tp)
+{
+	/* Check for name collision */
+	if (tp->refs != 1) {
+		TRAP_ERROR();
+		return (EBUSY);
+	}
+
+	/* Unlink type */
+	mtx_lock(&ng_typelist_mtx);
+	LIST_REMOVE(tp, types);
+	mtx_unlock(&ng_typelist_mtx);
+	return (0);
+}
+
+/*
  * Look for a type of the name given
  */
 struct ng_type *