mac_sdu_get
mac_sdu_get(mh, NULL, &ifreq.ifr_mtu);
mac_sdu_get(mh, NULL, &lifreq.lifr_mtu);
mac_sdu_get(ps->ps_mh, NULL, &ps->ps_max_sdu);
mac_sdu_get(mh, NULL, &maxsdu);
mac_sdu_get(port->lp_mh, NULL, &port_sdu_max);
mac_sdu_get(port->lp_mh, NULL, &port_sdu_max);
mac_sdu_get((mac_handle_t)mhandle, NULL, mtup);
mac_sdu_get(blp->bl_mh, NULL, &maxsdu);
mac_sdu_get(mh, NULL, &maxsdu);
mac_sdu_get(dlp->dl_mh, NULL, &diap->dia_max_sdu);
mac_sdu_get(dsp->ds_mh, NULL, &max_sdu);
mac_sdu_get(dsp->ds_mh, &dlp->dl_min_sdu, &dlp->dl_max_sdu);
mac_sdu_get(dsp->ds_mh, NULL, &max_sdu);
mac_sdu_get(mac->fm_handle, NULL, &mac->fm_eport.eport_mtu);
mac_sdu_get(odd->odd_mh, NULL, &mtu);
mac_sdu_get(vnic->vn_lower_mh, &mac->m_min_sdu,
extern void mac_sdu_get(mac_handle_t, uint_t *, uint_t *);
extern void mac_sdu_get(mac_handle_t, uint_t *, uint_t *);
mac_sdu_get(xnbop->o_mh, NULL, &max_sdu);