OP_RENEW
encode_op_hdr(xdr, OP_RENEW, decode_renew_maxsz, hdr);
return decode_op_hdr(xdr, OP_RENEW);
[OP_RENEW] = {
[OP_RENEW] = nfsd4_decode_renew,
[OP_RENEW] = nfsd4_encode_noop,