static int tbf_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)
{
struct rtattr *tb[TCA_TBF_PTAB+1];
struct tc_tbf_qopt *qopt;
double buffer, mtu;
double latency;
SPRINT_BUF(b1);
SPRINT_BUF(b2);
if (opt == NULL)
return 0;
parse_rtattr_nested(tb, TCA_TBF_PTAB, opt);
if (tb[TCA_TBF_PARMS] == NULL)
return -1;
qopt = RTA_DATA(tb[TCA_TBF_PARMS]);
if (RTA_PAYLOAD(tb[TCA_TBF_PARMS]) < sizeof(*qopt))
return -1;
fprintf(f, "rate %s ", sprint_rate(qopt->rate.rate, b1));
buffer = tc_calc_xmitsize(qopt->rate.rate, qopt->buffer);
if (show_details) {
fprintf(f, "burst %s/%u mpu %s ", sprint_size(buffer, b1),
1<<qopt->rate.cell_log, sprint_size(qopt->rate.mpu, b2));
} else {
fprintf(f, "burst %s ", sprint_size(buffer, b1));
}
if (show_raw)
fprintf(f, "[%08x] ", qopt->buffer);
if (qopt->peakrate.rate) {
fprintf(f, "peakrate %s ", sprint_rate(qopt->peakrate.rate, b1));
if (qopt->mtu || qopt->peakrate.mpu) {
mtu = tc_calc_xmitsize(qopt->peakrate.rate, qopt->mtu);
if (show_details) {
fprintf(f, "mtu %s/%u mpu %s ", sprint_size(mtu, b1),
1<<qopt->peakrate.cell_log, sprint_size(qopt->peakrate.mpu, b2));
} else {
fprintf(f, "minburst %s ", sprint_size(mtu, b1));
}
if (show_raw)
fprintf(f, "[%08x] ", qopt->mtu);
}
}
if (show_raw)
fprintf(f, "limit %s ", sprint_size(qopt->limit, b1));
latency = TIME_UNITS_PER_SEC*(qopt->limit/(double)qopt->rate.rate) - tc_core_tick2time(qopt->buffer);
if (qopt->peakrate.rate) {
double lat2 = TIME_UNITS_PER_SEC*(qopt->limit/(double)qopt->peakrate.rate) - tc_core_tick2time(qopt->mtu);
if (lat2 > latency)
latency = lat2;
}
fprintf(f, "lat %s ", sprint_time(latency, b1));
return 0;
}
unsigned tc_calc_xmitsize(__u64 rate, unsigned ticks)
{
return ((double)rate*tc_core_tick2time(ticks))/TIME_UNITS_PER_SEC;
}
