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net/sched: act_police: add support for packet-per-second policing

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Allow a policer action to enforce a rate-limit based on packets-per-second,
configurable using a packet-per-second rate and burst parameters.

e.g.
tc filter add dev tap1 parent ffff: u32 match \
        u32 0 0 police pkts_rate 3000 pkts_burst 1000

Testing was unable to uncover a performance impact of this change on
existing features.

Signed-off-by: Baowen Zheng <baowen.zheng@corigine.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Louis Peens <louis.peens@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Baowen Zheng 2021-03-12 15:08:31 +01:00 • committed by David S. Miller
parent 6a56e19902
commit 2ffe039528
5 changed files with 162 additions and 36 deletions
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14
include/net/sch_generic.h
View file

@ -1242,6 +1242,20 @@ static inline void psched_ratecfg_getrate(struct tc_ratespec *res,
res->linklayer = (r->linklayer & TC_LINKLAYER_MASK);
}
struct psched_pktrate {
u64 rate_pkts_ps; /* packets per second */
u32 mult;
u8 shift;
};
static inline u64 psched_pkt2t_ns(const struct psched_pktrate *r,
unsigned int pkt_num)
{
return ((u64)pkt_num * r->mult) >> r->shift;
}
void psched_ppscfg_precompute(struct psched_pktrate *r, u64 pktrate64);
/* Mini Qdisc serves for specific needs of ingress/clsact Qdisc.
* The fast path only needs to access filter list and to update stats
*/