rt_use
ro->ro_rt->rt_use++;
rtm->rtm_use = rt->rt_use;
ipf->ipf_ro.ro_rt->rt_use += ipf->ipf_uses;
ipf->ipf_ro.ro_rt->rt_use += ipf->ipf_uses;
ro->ro_rt->rt_use++;
ro->ro_rt->rt_use++;
ro->ro_rt->rt_use++;
len = snprintf(buffer, sizeof(buffer), "%lu", rt->rt_use);
wid_use, rt->rt_use);