na_bytes
nap->na_bytes = fxdr_hyper(&fp->fa3_used);
nap->na_bytes =
if ((u_int64_t)nap->na_bytes != thyp)
nap->na_bytes = thyp;
txdr_hyper(nvap->na_bytes, &fp->fa3_used);
fp->fa2_blocks = txdr_unsigned(nvap->na_bytes / NFS_FABLKSIZE);