obj: object header is no longer allocated automatically

obj/namespace.c

@@ -1,9 +1,13 @@
 #include <socks/object.h>
 
+#define NAMESPACE_CAST(p) OBJECT_C_CAST(struct object_namespace, ns_base, &ns_type, p)
+
+static struct object_type ns_type;
 static struct object_namespace *global_ns;
 
 struct object_namespace {
 	/* root directory set object */
+	struct object ns_base;
 	struct object *ns_root;
 };
 
@@ -16,13 +20,13 @@ static kern_status_t ns_query_name(struct object *obj, char out[OBJECT_NAME_MAX]
 
 static kern_status_t ns_get_child_at(struct object *obj, size_t at, struct object **out)
 {
-	struct object_namespace *ns = object_data(obj);
+	struct object_namespace *ns = NAMESPACE_CAST(obj);
 	return object_get_child_at(ns->ns_root, at, out);
 }
 
 static kern_status_t ns_get_child_named(struct object *obj, const char *name, struct object **out)
 {
-	struct object_namespace *ns = object_data(obj);
+	struct object_namespace *ns = NAMESPACE_CAST(obj);
 	return object_get_child_named(ns->ns_root, name, out);
 }
 
@@ -36,7 +40,6 @@ static struct object_type ns_type = {
 	},
 };
 
-
 void init_global_namespace(void)
 {
 	object_type_register(&ns_type);
@@ -51,7 +54,7 @@ struct object_namespace *global_namespace(void)
 struct object_namespace *object_namespace_create(void)
 {
 	struct object *ns_object = object_create(&ns_type);
-	struct object_namespace *ns = object_data(ns_object);
+	struct object_namespace *ns = NAMESPACE_CAST(ns_object);
 	ns->ns_root = set_create("/");
 	return ns;
 }
@@ -93,6 +96,11 @@ static void cleanup_object_path(char *path, size_t len, size_t *parts)
 	path[final_len] = 0;
 }
 
+struct object *ns_header(struct object_namespace *ns)
+{
+	return &ns->ns_base;
+}
+
 kern_status_t object_publish(struct object_namespace *ns, const char *path, struct object *obj)
 {
 	if (*path != '/') {