nfs3_cookie
srdc.nfs3_cookie = uiop->uio_loffset;
srdc.nfs3_cookie = rdc->nfs3_ncookie;
rrdc->nfs3_cookie = rdc->nfs3_ncookie;
nrdc->nfs3_cookie = uiop->uio_loffset;
args.cookie = (cookie3)rdc->nfs3_cookie;
res.loff = rdc->nfs3_cookie;
args.cookie = (cookie3)rdc->nfs3_cookie;
res.loff = rdc->nfs3_cookie;
if (a->nfs3_cookie == b->nfs3_cookie) {
if (a->nfs3_cookie < b->nfs3_cookie)