netdev - [PATH net 2/2] net: ipv6: use drop reasons in ip6

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Message-Id: <1761286996-39440-3-git-send-email-liyonglong@chinatelecom.cn>
Date: Fri, 24 Oct 2025 14:23:16 +0800
From: Yonglong Li <liyonglong@...natelecom.cn>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	dsahern@...nel.org,
	edumazet@...gle.com,
	pabeni@...hat.com,
	kuba@...nel.org,
	horms@...nel.org,
	liyonglong@...natelecom.cn
Subject: [PATH net 2/2] net: ipv6: use drop reasons in ip6_fragment

use drop reasons in ip6_output like ip_fragment/ip_do_fragment

Signed-off-by: Yonglong Li <liyonglong@...natelecom.cn>
---
 net/ipv6/ip6_output.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index f904739e..575c7d1 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -875,6 +875,7 @@ int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
 		 int (*output)(struct net *, struct sock *, struct sk_buff *))
 {
 	struct sk_buff *frag;
+	enum skb_drop_reason reason = SKB_DROP_REASON_FRAG_FAILED;
 	struct rt6_info *rt = dst_rt6_info(skb_dst(skb));
 	struct ipv6_pinfo *np = skb->sk && !dev_recursion_level() ?
 				inet6_sk(skb->sk) : NULL;
@@ -995,7 +996,7 @@ int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
 			return 0;
 		}
 
-		kfree_skb_list(iter.frag);
+		kfree_skb_list_reason(iter.frag, reason);
 
 		IP6_INC_STATS(net, ip6_dst_idev(&rt->dst),
 			      IPSTATS_MIB_FRAGFAILS);
@@ -1050,12 +1051,13 @@ int ip6_fragment(struct net *net, struct sock *sk, struct sk_buff *skb,
 
 fail_toobig:
 	icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
+	reason = SKB_DROP_REASON_PKT_TOO_BIG;
 	err = -EMSGSIZE;
 
 fail:
 	IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
 		      IPSTATS_MIB_FRAGFAILS);
-	kfree_skb(skb);
+	kfree_skb_reason(skb, reason);
 	return err;
 }
 
-- 
1.8.3.1