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net/sched: sch_api: add helper for tc qdisc walker stats dump

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The walk implementation of most qdisc class modules is basically the
same. That is, the values of count and skip are checked first. If
count is greater than or equal to skip, the registered fn function is
executed. Otherwise, increase the value of count. So we can reconstruct
them.

Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Zhengchao Shao 2022-09-21 10:41:04 +08:00 committed by Jakub Kicinski
parent a2c2a4ddc2
commit d7a68e564e
1 changed files with 13 additions and 0 deletions
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13
include/net/pkt_sched.h
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@ -222,4 +222,17 @@ static inline struct tc_skb_cb *tc_skb_cb(const struct sk_buff *skb)
return cb;
}
static inline bool tc_qdisc_stats_dump(struct Qdisc *sch,
unsigned long cl,
struct qdisc_walker *arg)
{
if (arg->count >= arg->skip && arg->fn(sch, cl, arg) < 0) {
arg->stop = 1;
return false;
}
arg->count++;
return true;
}
#endif