linux-kernel - [PATCH v2] ipvlan: flush arp table when mac address changed

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Message-ID: <20180514092256.10940-1-liuqifa@huawei.com>
Date:   Mon, 14 May 2018 17:22:56 +0800
From:   <liuqifa@...wei.com>
To:     <davem@...emloft.net>, <dsahern@...il.com>, <maheshb@...gle.com>,
        <weiyongjun1@...wei.com>, <maowenan@...wei.com>,
        <dingtianhong@...wei.com>, <liuqifa@...wei.com>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] ipvlan: flush arp table when mac address changed

From: Keefe Liu <liuqifa@...wei.com>

When master device's mac has been changed, the
commit <32c10bbfe914> "ipvlan: always use the current L2
addr of the master" makes the IPVlan devices's mac changed
also, but it doesn't flush the IPVlan's arp table.

Signed-off-by: Keefe Liu <liuqifa@...wei.com>
---
 drivers/net/ipvlan/ipvlan_main.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c
index 450eec2..4377c26 100644
--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -792,8 +792,10 @@ static int ipvlan_device_event(struct notifier_block *unused,
 		break;
 
 	case NETDEV_CHANGEADDR:
-		list_for_each_entry(ipvlan, &port->ipvlans, pnode)
+		list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
 			ether_addr_copy(ipvlan->dev->dev_addr, dev->dev_addr);
+			call_netdevice_notifiers(NETDEV_CHANGEADDR, ipvlan->dev);
+		}
 		break;
 
 	case NETDEV_PRE_TYPE_CHANGE:
-- 
1.8.3.1