linux-kernel - [PATCH V9 net-next 11/11] net: add ndo_validate_addr check in dev_set_mac

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Message-ID: <20240910075942.1270054-12-shaojijie@huawei.com>
Date: Tue, 10 Sep 2024 15:59:42 +0800
From: Jijie Shao <shaojijie@...wei.com>
To: <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
	<pabeni@...hat.com>
CC: <shenjian15@...wei.com>, <wangpeiyang1@...wei.com>,
	<liuyonglong@...wei.com>, <chenhao418@...wei.com>, <sudongming1@...wei.com>,
	<xujunsheng@...wei.com>, <shiyongbang@...wei.com>, <libaihan@...wei.com>,
	<andrew@...n.ch>, <jdamato@...tly.com>, <horms@...nel.org>,
	<kalesh-anakkur.purayil@...adcom.com>, <jonathan.cameron@...wei.com>,
	<shameerali.kolothum.thodi@...wei.com>, <salil.mehta@...wei.com>,
	<netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<shaojijie@...wei.com>
Subject: [PATCH V9 net-next 11/11] net: add ndo_validate_addr check in dev_set_mac_address

If driver implements ndo_validate_addr,
core should check the mac address before ndo_set_mac_address.

Signed-off-by: Jijie Shao <shaojijie@...wei.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---
ChangeLog:
v2 -> v3:
  - Use ndo_validate_addr() instead of is_valid_ether_addr()
    in dev_set_mac_address(), suggested by Jakub and Andrew.
  v2: https://lore.kernel.org/all/20240820140154.137876-1-shaojijie@huawei.com/
---
 net/core/dev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/core/dev.c b/net/core/dev.c
index 22c3f14d9287..00e0f473ed44 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -9087,6 +9087,11 @@ int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa,
 		return -EOPNOTSUPP;
 	if (sa->sa_family != dev->type)
 		return -EINVAL;
+	if (ops->ndo_validate_addr) {
+		err = ops->ndo_validate_addr(dev);
+		if (err)
+			return err;
+	}
 	if (!netif_device_present(dev))
 		return -ENODEV;
 	err = dev_pre_changeaddr_notify(dev, sa->sa_data, extack);
-- 
2.33.0