autofs_node_vn
int autofs_node_vn(struct autofs_node *anp, struct mount *mp,
error = autofs_node_vn(amp->am_root, mp, flags, vpp);
return (autofs_node_vn(arg, mp, flags, vpp));
error = autofs_node_vn(child, mp, cnp->cn_lkflags, vpp);
error = autofs_node_vn(child, vp->v_mount, LK_EXCLUSIVE, ap->a_vpp);