From e49efd5288bd6670cc05860fe04ef611c3887399 Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Mon, 19 Nov 2018 15:21:43 -0800 Subject: net: sched: gred: support reporting stats from offloads Allow drivers which offload GRED to report back statistics. Since A lot of GRED stats is fairly ad hoc in nature pass to drivers the standard struct gnet_stats_basic/gnet_stats_queue pairs, and untangle the values in the core. Signed-off-by: Jakub Kicinski Reviewed-by: John Hurley Signed-off-by: David S. Miller --- include/net/pkt_cls.h | 8 ++++++++ net/sched/sch_gred.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 55 insertions(+) diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h index c9198797aaed..d0e9a8091426 100644 --- a/include/net/pkt_cls.h +++ b/include/net/pkt_cls.h @@ -871,6 +871,7 @@ struct tc_red_qopt_offload { enum tc_gred_command { TC_GRED_REPLACE, TC_GRED_DESTROY, + TC_GRED_STATS, }; struct tc_gred_vq_qopt_offload_params { @@ -895,12 +896,19 @@ struct tc_gred_qopt_offload_params { struct tc_gred_vq_qopt_offload_params tab[MAX_DPs]; }; +struct tc_gred_qopt_offload_stats { + struct gnet_stats_basic_packed bstats[MAX_DPs]; + struct gnet_stats_queue qstats[MAX_DPs]; + struct red_stats *xstats[MAX_DPs]; +}; + struct tc_gred_qopt_offload { enum tc_gred_command command; u32 handle; u32 parent; union { struct tc_gred_qopt_offload_params set; + struct tc_gred_qopt_offload_stats stats; }; }; diff --git a/net/sched/sch_gred.c b/net/sched/sch_gred.c index 908c9d1dfdf8..234afbf9115b 100644 --- a/net/sched/sch_gred.c +++ b/net/sched/sch_gred.c @@ -354,6 +354,50 @@ static void gred_offload(struct Qdisc *sch, enum tc_gred_command command) dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_QDISC_GRED, &opt); } +static int gred_offload_dump_stats(struct Qdisc *sch) +{ + struct gred_sched *table = qdisc_priv(sch); + struct tc_gred_qopt_offload *hw_stats; + unsigned int i; + int ret; + + hw_stats = kzalloc(sizeof(*hw_stats), GFP_KERNEL); + if (!hw_stats) + return -ENOMEM; + + hw_stats->command = TC_GRED_STATS; + hw_stats->handle = sch->handle; + hw_stats->parent = sch->parent; + + for (i = 0; i < MAX_DPs; i++) + if (table->tab[i]) + hw_stats->stats.xstats[i] = &table->tab[i]->stats; + + ret = qdisc_offload_dump_helper(sch, TC_SETUP_QDISC_GRED, hw_stats); + /* Even if driver returns failure adjust the stats - in case offload + * ended but driver still wants to adjust the values. + */ + for (i = 0; i < MAX_DPs; i++) { + if (!table->tab[i]) + continue; + table->tab[i]->packetsin += hw_stats->stats.bstats[i].packets; + table->tab[i]->bytesin += hw_stats->stats.bstats[i].bytes; + table->tab[i]->backlog += hw_stats->stats.qstats[i].backlog; + + _bstats_update(&sch->bstats, + hw_stats->stats.bstats[i].bytes, + hw_stats->stats.bstats[i].packets); + sch->qstats.qlen += hw_stats->stats.qstats[i].qlen; + sch->qstats.backlog += hw_stats->stats.qstats[i].backlog; + sch->qstats.drops += hw_stats->stats.qstats[i].drops; + sch->qstats.requeues += hw_stats->stats.qstats[i].requeues; + sch->qstats.overlimits += hw_stats->stats.qstats[i].overlimits; + } + + kfree(hw_stats); + return ret; +} + static inline void gred_destroy_vq(struct gred_sched_data *q) { kfree(q); @@ -725,6 +769,9 @@ static int gred_dump(struct Qdisc *sch, struct sk_buff *skb) .flags = table->red_flags, }; + if (gred_offload_dump_stats(sch)) + goto nla_put_failure; + opts = nla_nest_start(skb, TCA_OPTIONS); if (opts == NULL) goto nla_put_failure; -- cgit v1.2.3