net: ipv6: add skb drop reasons to ip6_pkt_drop()

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

Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Jiang Biao <benbjiang@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 169e9df6d172ead607cc20a108c3371a20dbc632..9471ab4421c887fb78f19f0002a59d003b171921 100644 (file)
--- 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;
 }