vop_aclcheck
.vop_aclcheck = (void *)vop_eopnotsupp,
DO_OPS(ops, error, &ap, vop_aclcheck);
DO_OPS(ap->a_head.a_ops, error, ap, vop_aclcheck);
vop_aclcheck(*(vp)->v_ops, vp, type, aclp, cred)
int (*vop_aclcheck)(struct vop_aclcheck_args *);
int vop_aclcheck(struct vop_ops *ops, struct vnode *vp, acl_type_t type,