htb: fix two bugs
Commit 56b765b79e
(htb: improved accuracy at high rates)
introduced two bugs :
1) one bstats_update() was inadvertently removed from
htb_dequeue_tree(), breaking statistics/rate estimation.
2) Missing qdisc_put_rtab() calls in htb_change_class(),
leaking kernel memory, now struct htb_class no longer
retains pointers to qdisc_rate_table structs.
Since only rate is used, dont use qdisc_get_rtab() calls
copying data we ignore anyway.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Vimalkumar <j.vimal@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -879,6 +879,7 @@ next:
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} while (cl != start);
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if (likely(skb != NULL)) {
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bstats_update(&cl->bstats, skb);
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cl->un.leaf.deficit[level] -= qdisc_pkt_len(skb);
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if (cl->un.leaf.deficit[level] < 0) {
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cl->un.leaf.deficit[level] += cl->quantum;
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@ -1355,7 +1356,6 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
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struct htb_sched *q = qdisc_priv(sch);
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struct htb_class *cl = (struct htb_class *)*arg, *parent;
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struct nlattr *opt = tca[TCA_OPTIONS];
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struct qdisc_rate_table *rtab = NULL, *ctab = NULL;
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struct nlattr *tb[__TCA_HTB_MAX];
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struct tc_htb_opt *hopt;
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@ -1374,10 +1374,7 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
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parent = parentid == TC_H_ROOT ? NULL : htb_find(parentid, sch);
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hopt = nla_data(tb[TCA_HTB_PARMS]);
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rtab = qdisc_get_rtab(&hopt->rate, tb[TCA_HTB_RTAB]);
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ctab = qdisc_get_rtab(&hopt->ceil, tb[TCA_HTB_CTAB]);
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if (!rtab || !ctab)
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if (!hopt->rate.rate || !hopt->ceil.rate)
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goto failure;
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if (!cl) { /* new class */
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@ -1487,7 +1484,7 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
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* is really leaf before changing cl->un.leaf !
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*/
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if (!cl->level) {
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cl->quantum = rtab->rate.rate / q->rate2quantum;
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cl->quantum = hopt->rate.rate / q->rate2quantum;
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if (!hopt->quantum && cl->quantum < 1000) {
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pr_warning(
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"HTB: quantum of class %X is small. Consider r2q change.\n",
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@ -1509,8 +1506,8 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
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cl->buffer = hopt->buffer;
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cl->cbuffer = hopt->cbuffer;
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cl->rate.rate_bps = (u64)rtab->rate.rate << 3;
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cl->ceil.rate_bps = (u64)ctab->rate.rate << 3;
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cl->rate.rate_bps = (u64)hopt->rate.rate << 3;
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cl->ceil.rate_bps = (u64)hopt->ceil.rate << 3;
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htb_precompute_ratedata(&cl->rate);
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htb_precompute_ratedata(&cl->ceil);
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@ -1526,10 +1523,6 @@ static int htb_change_class(struct Qdisc *sch, u32 classid,
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return 0;
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failure:
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if (rtab)
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qdisc_put_rtab(rtab);
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if (ctab)
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qdisc_put_rtab(ctab);
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return err;
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}
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