OP_LAYOUTERROR
return decode_op_hdr(xdr, OP_LAYOUTERROR);
encode_op_hdr(xdr, OP_LAYOUTERROR, decode_layouterror_maxsz, hdr);
[OP_LAYOUTERROR] = nfsd4_decode_notsupp,
[OP_LAYOUTERROR] = nfsd4_encode_noop,