nfsd4_decode_opaque
status = nfsd4_decode_opaque(argp, &setclientid->se_name);
status = nfsd4_decode_opaque(argp, &exid->nii_domain);
status = nfsd4_decode_opaque(argp, &exid->nii_name);
status = nfsd4_decode_opaque(argp, &exid->clname);
return nfsd4_decode_opaque(argp, owner);