VOP_PATHCONF
error = VOP_PATHCONF(vp, flag, retf);
error = VOP_PATHCONF(vp, _PC_ACL_NFS4, &retval);
return (VOP_PATHCONF(vp, ap->a_name, ap->a_retval));
error = VOP_PATHCONF(nd.ni_vp, name, retval);
error = VOP_PATHCONF(vp, name, retval);
error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax);
error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax);
error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres);
error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc);
error = VOP_PATHCONF(vp, name, retval);
int VOP_PATHCONF(struct vnode *, int, register_t *);