udf_dir_attach
error = udf_dir_attach(tdnode->ump, tdnode, fnode, &fvap, tcnp);
udf_dir_attach(tdnode->ump, fdnode, fnode, &fvap, fcnp);
error = udf_dir_attach(ump, dir_node, udf_node, vap, cnp);
int udf_dir_attach(struct udf_mount *ump, struct udf_node *dir_node, struct udf_node *udf_node, struct vattr *vap, struct componentname *cnp);
error = udf_dir_attach(dir_node->ump, dir_node, udf_node, &vap, cnp);