netdev - [PATCH net-next 09/13] net/sched: allow stats updates from offloaded police actions

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Message-Id: <20190504114628.14755-10-jakub.kicinski@netronome.com>
Date:   Sat,  4 May 2019 04:46:24 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, oss-drivers@...ronome.com,
        jiri@...nulli.us, xiyou.wangcong@...il.com, idosch@...lanox.com,
        f.fainelli@...il.com, andrew@...n.ch, vivien.didelot@...il.com,
        gerlitz.or@...il.com, simon.horman@...ronome.com,
        Pieter Jansen van Vuuren 
        <pieter.jansenvanvuuren@...ronome.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>
Subject: [PATCH net-next 09/13] net/sched: allow stats updates from offloaded police actions

From: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@...ronome.com>

Implement the stats_update callback for the police action that
will be used by drivers for hardware offload.

Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@...ronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@...ronome.com>
---
 net/sched/act_police.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/net/sched/act_police.c b/net/sched/act_police.c
index e33bcab75d1f..61731944742a 100644
--- a/net/sched/act_police.c
+++ b/net/sched/act_police.c
@@ -282,6 +282,20 @@ static void tcf_police_cleanup(struct tc_action *a)
 		kfree_rcu(p, rcu);
 }
 
+static void tcf_police_stats_update(struct tc_action *a,
+				    u64 bytes, u32 packets,
+				    u64 lastuse, bool hw)
+{
+	struct tcf_police *police = to_police(a);
+	struct tcf_t *tm = &police->tcf_tm;
+
+	_bstats_cpu_update(this_cpu_ptr(a->cpu_bstats), bytes, packets);
+	if (hw)
+		_bstats_cpu_update(this_cpu_ptr(a->cpu_bstats_hw),
+				   bytes, packets);
+	tm->lastuse = max_t(u64, tm->lastuse, lastuse);
+}
+
 static int tcf_police_dump(struct sk_buff *skb, struct tc_action *a,
 			       int bind, int ref)
 {
@@ -345,6 +359,7 @@ static struct tc_action_ops act_police_ops = {
 	.kind		=	"police",
 	.id		=	TCA_ID_POLICE,
 	.owner		=	THIS_MODULE,
+	.stats_update	=	tcf_police_stats_update,
 	.act		=	tcf_police_act,
 	.dump		=	tcf_police_dump,
 	.init		=	tcf_police_init,
-- 
2.21.0