netdev - [PATCH net] ipvlan: Fix return value of ipvlan_queue

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Date: Fri, 16 Jun 2023 11:33:17 +0800
From: Cambda Zhu <cambda@...ux.alibaba.com>
To: netdev@...r.kernel.org
Cc: Eric Dumazet <edumazet@...gle.com>,
	Paolo Abeni <pabeni@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	David Ahern <dsahern@...nel.org>,
	Jakub Kicinski <kuba@...nel.org>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
	Dust Li <dust.li@...ux.alibaba.com>,
	Tony Lu <tonylu@...ux.alibaba.com>,
	Cambda Zhu <cambda@...ux.alibaba.com>
Subject: [PATCH net] ipvlan: Fix return value of ipvlan_queue_xmit()

The ipvlan_queue_xmit() should return NET_XMIT_XXX,
but ipvlan_xmit_mode_l2/l3() returns rx_handler_result_t or NET_RX_XXX
in some cases. The skb to forward could be treated as xmitted
successfully.

Signed-off-by: Cambda Zhu <cambda@...ux.alibaba.com>
---
 drivers/net/ipvlan/ipvlan_core.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ipvlan/ipvlan_core.c b/drivers/net/ipvlan/ipvlan_core.c
index ab5133eb1d51..e45817caaee8 100644
--- a/drivers/net/ipvlan/ipvlan_core.c
+++ b/drivers/net/ipvlan/ipvlan_core.c
@@ -585,7 +585,8 @@ static int ipvlan_xmit_mode_l3(struct sk_buff *skb, struct net_device *dev)
 				consume_skb(skb);
 				return NET_XMIT_DROP;
 			}
-			return ipvlan_rcv_frame(addr, &skb, true);
+			ipvlan_rcv_frame(addr, &skb, true);
+			return NET_XMIT_SUCCESS;
 		}
 	}
 out:
@@ -611,7 +612,8 @@ static int ipvlan_xmit_mode_l2(struct sk_buff *skb, struct net_device *dev)
 					consume_skb(skb);
 					return NET_XMIT_DROP;
 				}
-				return ipvlan_rcv_frame(addr, &skb, true);
+				ipvlan_rcv_frame(addr, &skb, true);
+				return NET_XMIT_SUCCESS;
 			}
 		}
 		skb = skb_share_check(skb, GFP_ATOMIC);
@@ -623,7 +625,8 @@ static int ipvlan_xmit_mode_l2(struct sk_buff *skb, struct net_device *dev)
 		 * the skb for the main-dev. At the RX side we just return
 		 * RX_PASS for it to be processed further on the stack.
 		 */
-		return dev_forward_skb(ipvlan->phy_dev, skb);
+		dev_forward_skb(ipvlan->phy_dev, skb);
+		return NET_XMIT_SUCCESS;
 
 	} else if (is_multicast_ether_addr(eth->h_dest)) {
 		skb_reset_mac_header(skb);
-- 
2.16.6