From: David Dai <zdai@linux.vnet.ibm.com>
Date: Wed, 4 Sep 2019 10:03:43 -0500
Subject: net_sched: act_police: add 2 new attributes to support police 64bit
 rate and peakrate
Patch-mainline: v5.4-rc1
Git-commit: d1967e495a8d1dd6b8ff2df9d3e045c5d60a37a6
References: bsc#1154353

For high speed adapter like Mellanox CX-5 card, it can reach upto
100 Gbits per second bandwidth. Currently htb already supports 64bit rate
in tc utility. However police action rate and peakrate are still limited
to 32bit value (upto 32 Gbits per second). Add 2 new attributes
TCA_POLICE_RATE64 and TCA_POLICE_RATE64 in kernel for 64bit support
so that tc utility can use them for 64bit rate and peakrate value to
break the 32bit limit, and still keep the backward binary compatibility.

Tested-by: David Dai <zdai@linux.vnet.ibm.com>
Signed-off-by: David Dai <zdai@linux.vnet.ibm.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 include/uapi/linux/pkt_cls.h |    2 ++
 net/sched/act_police.c       |   27 +++++++++++++++++++++++----
 2 files changed, 25 insertions(+), 4 deletions(-)

--- a/include/uapi/linux/pkt_cls.h
+++ b/include/uapi/linux/pkt_cls.h
@@ -160,6 +160,8 @@ enum {
 	TCA_POLICE_RESULT,
 	TCA_POLICE_TM,
 	TCA_POLICE_PAD,
+	TCA_POLICE_RATE64,
+	TCA_POLICE_PEAKRATE64,
 	__TCA_POLICE_MAX
 #define TCA_POLICE_RESULT TCA_POLICE_RESULT
 };
--- a/net/sched/act_police.c
+++ b/net/sched/act_police.c
@@ -40,6 +40,8 @@ static const struct nla_policy police_po
 	[TCA_POLICE_PEAKRATE]	= { .len = TC_RTAB_SIZE },
 	[TCA_POLICE_AVRATE]	= { .type = NLA_U32 },
 	[TCA_POLICE_RESULT]	= { .type = NLA_U32 },
+	[TCA_POLICE_RATE64]     = { .type = NLA_U64 },
+	[TCA_POLICE_PEAKRATE64] = { .type = NLA_U64 },
 };
 
 static int tcf_police_init(struct net *net, struct nlattr *nla,
@@ -58,6 +60,7 @@ static int tcf_police_init(struct net *n
 	struct tcf_police_params *new;
 	bool exists = false;
 	u32 index;
+	u64 rate64, prate64;
 
 	if (nla == NULL)
 		return -EINVAL;
@@ -155,14 +158,18 @@ static int tcf_police_init(struct net *n
 	}
 	if (R_tab) {
 		new->rate_present = true;
-		psched_ratecfg_precompute(&new->rate, &R_tab->rate, 0);
+		rate64 = tb[TCA_POLICE_RATE64] ?
+			 nla_get_u64(tb[TCA_POLICE_RATE64]) : 0;
+		psched_ratecfg_precompute(&new->rate, &R_tab->rate, rate64);
 		qdisc_put_rtab(R_tab);
 	} else {
 		new->rate_present = false;
 	}
 	if (P_tab) {
 		new->peak_present = true;
-		psched_ratecfg_precompute(&new->peak, &P_tab->rate, 0);
+		prate64 = tb[TCA_POLICE_PEAKRATE64] ?
+			  nla_get_u64(tb[TCA_POLICE_PEAKRATE64]) : 0;
+		psched_ratecfg_precompute(&new->peak, &P_tab->rate, prate64);
 		qdisc_put_rtab(P_tab);
 	} else {
 		new->peak_present = false;
@@ -313,10 +320,22 @@ static int tcf_police_dump(struct sk_buf
 				      lockdep_is_held(&police->tcf_lock));
 	opt.mtu = p->tcfp_mtu;
 	opt.burst = PSCHED_NS2TICKS(p->tcfp_burst);
-	if (p->rate_present)
+	if (p->rate_present) {
 		psched_ratecfg_getrate(&opt.rate, &p->rate);
-	if (p->peak_present)
+		if ((police->params->rate.rate_bytes_ps >= (1ULL << 32)) &&
+		    nla_put_u64_64bit(skb, TCA_POLICE_RATE64,
+				      police->params->rate.rate_bytes_ps,
+				      TCA_POLICE_PAD))
+			goto nla_put_failure;
+	}
+	if (p->peak_present) {
 		psched_ratecfg_getrate(&opt.peakrate, &p->peak);
+		if ((police->params->peak.rate_bytes_ps >= (1ULL << 32)) &&
+		    nla_put_u64_64bit(skb, TCA_POLICE_PEAKRATE64,
+				      police->params->peak.rate_bytes_ps,
+				      TCA_POLICE_PAD))
+			goto nla_put_failure;
+	}
 	if (nla_put(skb, TCA_POLICE_TBF, sizeof(opt), &opt))
 		goto nla_put_failure;
 	if (p->tcfp_result &&