OP_GET_DIR_DELEGATION
encode_op_hdr(xdr, OP_GET_DIR_DELEGATION, decode_get_dir_deleg_maxsz, hdr);
status = decode_op_hdr(xdr, OP_GET_DIR_DELEGATION);
[OP_GET_DIR_DELEGATION] = {
[OP_GET_DIR_DELEGATION] = nfsd4_decode_get_dir_delegation,
[OP_GET_DIR_DELEGATION] = nfsd4_encode_get_dir_delegation,