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    Subject[PATCH 4.4 092/312] sch_sfb: keep backlog updated with qlen
    Date
    From: WANG Cong <xiyou.wangcong@gmail.com>

    commit 3d4357fba82b3cf19ebf0a04d1c9cb086af15d02 upstream.

    Fixes: 2ccccf5fb43f ("net_sched: update hierarchical backlog too")
    Cc: Jamal Hadi Salim <jhs@mojatatu.com>
    Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
    Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    net/sched/sch_sfb.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/net/sched/sch_sfb.c
    +++ b/net/sched/sch_sfb.c
    @@ -400,6 +400,7 @@ static int sfb_enqueue(struct sk_buff *s
    enqueue:
    ret = qdisc_enqueue(skb, child);
    if (likely(ret == NET_XMIT_SUCCESS)) {
    + qdisc_qstats_backlog_inc(sch, skb);
    sch->q.qlen++;
    increment_qlen(skb, q);
    } else if (net_xmit_drop_count(ret)) {
    @@ -428,6 +429,7 @@ static struct sk_buff *sfb_dequeue(struc

    if (skb) {
    qdisc_bstats_update(sch, skb);
    + qdisc_qstats_backlog_dec(sch, skb);
    sch->q.qlen--;
    decrement_qlen(skb, q);
    }
    @@ -450,6 +452,7 @@ static void sfb_reset(struct Qdisc *sch)
    struct sfb_sched_data *q = qdisc_priv(sch);

    qdisc_reset(q->qdisc);
    + sch->qstats.backlog = 0;
    sch->q.qlen = 0;
    q->slot = 0;
    q->double_buffering = false;

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