/* Parse netlink message to set options */
static int netem_change(struct Qdisc *sch, struct nlattr *opt)
{
struct netem_sched_data *q = qdisc_priv(sch);
struct nlattr *tb[TCA_NETEM_MAX + 1];
struct tc_netem_qopt *qopt;
int ret;
if (opt == NULL)
return -EINVAL;
qopt = nla_data(opt);
ret = parse_attr(tb, TCA_NETEM_MAX, opt, netem_policy, sizeof(*qopt));
if (ret < 0)
return ret;
ret = fifo_set_limit(q->qdisc, qopt->limit);
if (ret) {
pr_debug("netem: can't set fifo limit\n");
return ret;
}
q->latency = qopt->latency;
q->jitter = qopt->jitter;
q->limit = qopt->limit;
q->gap = qopt->gap;
q->counter = 0;
q->loss = qopt->loss;
q->duplicate = qopt->duplicate;
/* for compatibility with earlier versions.
* if gap is set, need to assume 100% probability
*/
if (q->gap)
q->reorder = ~0;
if (tb[TCA_NETEM_CORR])
get_correlation(sch, tb[TCA_NETEM_CORR]);
if (tb[TCA_NETEM_DELAY_DIST]) {
ret = get_dist_table(sch, tb[TCA_NETEM_DELAY_DIST]);
if (ret)
return ret;
}
if (tb[TCA_NETEM_REORDER])
get_reorder(sch, tb[TCA_NETEM_REORDER]);
if (tb[TCA_NETEM_CORRUPT])
get_corrupt(sch, tb[TCA_NETEM_CORRUPT]);
return 0;
}
/* Parse netlink message to set options */
static int netem_change(struct Qdisc *sch, struct rtattr *opt)
{
struct netem_sched_data *q = qdisc_priv(sch);
struct tc_netem_qopt *qopt;
int ret;
if (opt == NULL || RTA_PAYLOAD(opt) < sizeof(*qopt))
return -EINVAL;
qopt = RTA_DATA(opt);
ret = set_fifo_limit(q->qdisc, qopt->limit);
if (ret) {
pr_debug("netem: can't set fifo limit\n");
return ret;
}
q->latency = qopt->latency;
q->jitter = qopt->jitter;
q->limit = qopt->limit;
q->gap = qopt->gap;
q->counter = 0;
q->loss = qopt->loss;
q->duplicate = qopt->duplicate;
/* for compatibility with earlier versions.
* if gap is set, need to assume 100% probability
*/
if (q->gap)
q->reorder = ~0;
/* Handle nested options after initial queue options.
* Should have put all options in nested format but too late now.
*/
if (RTA_PAYLOAD(opt) > sizeof(*qopt)) {
struct rtattr *tb[TCA_NETEM_MAX];
if (rtattr_parse(tb, TCA_NETEM_MAX,
RTA_DATA(opt) + sizeof(*qopt),
RTA_PAYLOAD(opt) - sizeof(*qopt)))
return -EINVAL;
if (tb[TCA_NETEM_CORR-1]) {
ret = get_correlation(sch, tb[TCA_NETEM_CORR-1]);
if (ret)
return ret;
}
if (tb[TCA_NETEM_DELAY_DIST-1]) {
ret = get_dist_table(sch, tb[TCA_NETEM_DELAY_DIST-1]);
if (ret)
return ret;
}
if (tb[TCA_NETEM_REORDER-1]) {
ret = get_reorder(sch, tb[TCA_NETEM_REORDER-1]);
if (ret)
return ret;
}
if (tb[TCA_NETEM_CORRUPT-1]) {
ret = get_corrupt(sch, tb[TCA_NETEM_CORRUPT-1]);
if (ret)
return ret;
}
}
return 0;
}