ifr_ifindex
sock.sll_ifindex = ifr.ifr_ifindex;
ret = add_del_if(netdev_priv(dev), ifr.ifr_ifindex, cmd == SIOCBRADDIF);
ifr->ifr_ifindex = dev->ifindex;
return netdev_get_name(net, ifr->ifr_name, ifr->ifr_ifindex);
addr.can_ifindex = ifr.ifr_ifindex;
return ifdata.ifr_ifindex;
dev->ifindex = ifr.ifr_ifindex;