xdr_encode_u64
bp = xdr_encode_u64(bp, op->store.pos);
bp = xdr_encode_u64(bp, op->store.size);
bp = xdr_encode_u64(bp, op->store.i_size);
bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */
bp = xdr_encode_u64(bp, 0); /* size of write */
bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
bp = xdr_encode_u64(bp, vp->fid.vid);
bp = xdr_encode_u64(bp, subreq->start + subreq->transferred);
bp = xdr_encode_u64(bp, subreq->len - subreq->transferred);