netdev - [PATCH net-next 3/9] net: ipv6: add skb drop reasons to ip6_pkt

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Date:   Wed, 13 Apr 2022 16:15:54 +0800
From:   menglong8.dong@...il.com
To:     dsahern@...nel.org
Cc:     rostedt@...dmis.org, mingo@...hat.com, davem@...emloft.net,
        yoshfuji@...ux-ipv6.org, kuba@...nel.org, pabeni@...hat.com,
        benbjiang@...cent.com, flyingpeng@...cent.com,
        imagedong@...cent.com, edumazet@...gle.com, kafai@...com,
        talalahmad@...gle.com, keescook@...omium.org,
        mengensun@...cent.com, dongli.zhang@...cle.com,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: [PATCH net-next 3/9] net: ipv6: add skb drop reasons to ip6_pkt_drop()

From: Menglong Dong <imagedong@...cent.com>

Replace kfree_skb() used in ip6_pkt_drop() with kfree_skb_reason().
No new reason is added.

Signed-off-by: Menglong Dong <imagedong@...cent.com>
Reviewed-by: Jiang Biao <benbjiang@...cent.com>
Reviewed-by: Hao Peng <flyingpeng@...cent.com>
---
 net/ipv6/route.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 169e9df6d172..9471ab4421c8 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -4482,6 +4482,7 @@ static int ip6_pkt_drop(struct sk_buff *skb, u8 code, int ipstats_mib_noroutes)
 	struct dst_entry *dst = skb_dst(skb);
 	struct net *net = dev_net(dst->dev);
 	struct inet6_dev *idev;
+	SKB_DR(reason);
 	int type;
 
 	if (netif_is_l3_master(skb->dev) ||
@@ -4494,11 +4495,14 @@ static int ip6_pkt_drop(struct sk_buff *skb, u8 code, int ipstats_mib_noroutes)
 	case IPSTATS_MIB_INNOROUTES:
 		type = ipv6_addr_type(&ipv6_hdr(skb)->daddr);
 		if (type == IPV6_ADDR_ANY) {
+			SKB_DR_SET(reason, IP_INADDRERRORS);
 			IP6_INC_STATS(net, idev, IPSTATS_MIB_INADDRERRORS);
 			break;
 		}
+		SKB_DR_SET(reason, IP_INNOROUTES);
 		fallthrough;
 	case IPSTATS_MIB_OUTNOROUTES:
+		SKB_DR_OR(reason, IP_OUTNOROUTES);
 		IP6_INC_STATS(net, idev, ipstats_mib_noroutes);
 		break;
 	}
@@ -4508,7 +4512,7 @@ static int ip6_pkt_drop(struct sk_buff *skb, u8 code, int ipstats_mib_noroutes)
 		skb_dst_drop(skb);
 
 	icmpv6_send(skb, ICMPV6_DEST_UNREACH, code, 0);
-	kfree_skb(skb);
+	kfree_skb_reason(skb, reason);
 	return 0;
 }
 
-- 
2.35.1