diff options
| author | WANG Cong <xiyou.wangcong@gmail.com> | 2016-02-25 14:55:01 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-05-18 17:06:39 -0700 |
| commit | ca375cf34a7186f5b8817082d2b594dcd8cedc8b (patch) | |
| tree | 682af6cf7b7913bef5e736c1d0e76fb947d1f4b9 /net/sched/sch_api.c | |
| parent | 1188e1403a772d9698c06bcc53c44783536ff09e (diff) | |
net_sched: update hierarchical backlog too
[ Upstream commit 2ccccf5fb43ff62b2b96cc58d95fc0b3596516e4 ]
When the bottom qdisc decides to, for example, drop some packet,
it calls qdisc_tree_decrease_qlen() to update the queue length
for all its ancestors, we need to update the backlog too to
keep the stats on root qdisc accurate.
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/sched/sch_api.c')
| -rw-r--r-- | net/sched/sch_api.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index af1acf009866..95b560f0b253 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -744,14 +744,15 @@ static u32 qdisc_alloc_handle(struct net_device *dev) return 0; } -void qdisc_tree_decrease_qlen(struct Qdisc *sch, unsigned int n) +void qdisc_tree_reduce_backlog(struct Qdisc *sch, unsigned int n, + unsigned int len) { const struct Qdisc_class_ops *cops; unsigned long cl; u32 parentid; int drops; - if (n == 0) + if (n == 0 && len == 0) return; drops = max_t(int, n, 0); rcu_read_lock(); @@ -774,11 +775,12 @@ void qdisc_tree_decrease_qlen(struct Qdisc *sch, unsigned int n) cops->put(sch, cl); } sch->q.qlen -= n; + sch->qstats.backlog -= len; __qdisc_qstats_drop(sch, drops); } rcu_read_unlock(); } -EXPORT_SYMBOL(qdisc_tree_decrease_qlen); +EXPORT_SYMBOL(qdisc_tree_reduce_backlog); static void notify_and_destroy(struct net *net, struct sk_buff *skb, struct nlmsghdr *n, u32 clid, |