OP_LOCK
encode_op_hdr(xdr, OP_LOCK, decode_lock_maxsz, hdr);
status = decode_op_hdr(xdr, OP_LOCK);
[OP_LOCK] = {
[OP_LOCK] = nfsd4_decode_lock,
if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
[OP_LOCK] = nfsd4_encode_lock,