linux-kernel - [PATCH net-next 2/3] net: ipgre: make erspan_rcv() return PACKET

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Message-Id: <20220314133312.336653-3-imagedong@tencent.com>
Date:   Mon, 14 Mar 2022 21:33:11 +0800
From:   menglong8.dong@...il.com
To:     dsahern@...nel.org, kuba@...nel.org
Cc:     rostedt@...dmis.org, mingo@...hat.com, xeb@...l.ru,
        davem@...emloft.net, yoshfuji@...ux-ipv6.org,
        imagedong@...cent.com, edumazet@...gle.com, kafai@...com,
        talalahmad@...gle.com, keescook@...omium.org, alobakin@...me,
        flyingpeng@...cent.com, mengensun@...cent.com,
        dongli.zhang@...cle.com, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, Biao Jiang <benbjiang@...cent.com>
Subject: [PATCH net-next 2/3] net: ipgre: make erspan_rcv() return PACKET_NEXT

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

PACKET_NEXT is returned in ipgre_rcv() when no tunnel device found. To
report skb drop reasons, we make erspan_rcv() the same way. Therefore,
we can know that skb is dropped out of tunnel device's absence when
PACKET_NEXT is returned.

Reviewed-by: Hao Peng <flyingpeng@...cent.com>
Reviewed-by: Biao Jiang <benbjiang@...cent.com>
Signed-off-by: Menglong Dong <imagedong@...cent.com>
---
 net/ipv4/ip_gre.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 99db2e41ed10..b1579d8374fd 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -341,7 +341,7 @@ static int erspan_rcv(struct sk_buff *skb, struct tnl_ptk_info *tpi,
 		ip_tunnel_rcv(tunnel, skb, tpi, tun_dst, log_ecn_error);
 		return PACKET_RCVD;
 	}
-	return PACKET_REJECT;
+	return PACKET_NEXT;
 
 drop:
 	kfree_skb(skb);
-- 
2.35.1