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| author | Eric Dumazet <edumazet@google.com> | 2012-11-05 16:40:49 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-11-06 19:06:29 -0500 |
| commit | 196d97f6b1a5d44be17f12e5adba36368915ba52 (patch) | |
| tree | 2e512f8271b19ba3d15dcb370ff0015eb110329e /net/sched | |
| parent | bd473da35bc21a0004b8ad35c19e0c8b53b03f36 (diff) | |
| download | linux-196d97f6b1a5d44be17f12e5adba36368915ba52.tar.gz linux-196d97f6b1a5d44be17f12e5adba36368915ba52.tar.bz2 linux-196d97f6b1a5d44be17f12e5adba36368915ba52.zip | |
htb: fix two bugs
Commit 56b765b79e9 (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>
Diffstat (limited to 'net/sched')
| -rw-r--r-- | net/sched/sch_htb.c | 17 |
1 files changed, 5 insertions, 12 deletions
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c index 32a80977cf54..d2922c0ef57a 100644 --- a/net/sched/sch_htb.c +++ b/net/sched/sch_htb.c @@ -879,6 +879,7 @@ next: } while (cl != start); if (likely(skb != NULL)) { + bstats_update(&cl->bstats, skb); cl->un.leaf.deficit[level] -= qdisc_pkt_len(skb); if (cl->un.leaf.deficit[level] < 0) { cl->un.leaf.deficit[level] += cl->quantum; @@ -1355,7 +1356,6 @@ static int htb_change_class(struct Qdisc *sch, u32 classid, struct htb_sched *q = qdisc_priv(sch); struct htb_class *cl = (struct htb_class *)*arg, *parent; struct nlattr *opt = tca[TCA_OPTIONS]; - struct qdisc_rate_table *rtab = NULL, *ctab = NULL; struct nlattr *tb[__TCA_HTB_MAX]; struct tc_htb_opt *hopt; @@ -1374,10 +1374,7 @@ static int htb_change_class(struct Qdisc *sch, u32 classid, parent = parentid == TC_H_ROOT ? NULL : htb_find(parentid, sch); hopt = nla_data(tb[TCA_HTB_PARMS]); - - rtab = qdisc_get_rtab(&hopt->rate, tb[TCA_HTB_RTAB]); - ctab = qdisc_get_rtab(&hopt->ceil, tb[TCA_HTB_CTAB]); - if (!rtab || !ctab) + if (!hopt->rate.rate || !hopt->ceil.rate) goto failure; if (!cl) { /* new class */ @@ -1487,7 +1484,7 @@ static int htb_change_class(struct Qdisc *sch, u32 classid, * is really leaf before changing cl->un.leaf ! */ if (!cl->level) { - cl->quantum = rtab->rate.rate / q->rate2quantum; + cl->quantum = hopt->rate.rate / q->rate2quantum; if (!hopt->quantum && cl->quantum < 1000) { pr_warning( "HTB: quantum of class %X is small. Consider r2q change.\n", @@ -1509,8 +1506,8 @@ static int htb_change_class(struct Qdisc *sch, u32 classid, cl->buffer = hopt->buffer; cl->cbuffer = hopt->cbuffer; - cl->rate.rate_bps = (u64)rtab->rate.rate << 3; - cl->ceil.rate_bps = (u64)ctab->rate.rate << 3; + cl->rate.rate_bps = (u64)hopt->rate.rate << 3; + cl->ceil.rate_bps = (u64)hopt->ceil.rate << 3; htb_precompute_ratedata(&cl->rate); htb_precompute_ratedata(&cl->ceil); @@ -1526,10 +1523,6 @@ static int htb_change_class(struct Qdisc *sch, u32 classid, return 0; failure: - if (rtab) - qdisc_put_rtab(rtab); - if (ctab) - qdisc_put_rtab(ctab); return err; } |