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

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Message-ID: <CAH-L+nP2oy4Haw1+8Jy3GGgphxBii8m2zD03FXbC0SeR7QdhQg@mail.gmail.com>
Date: Tue, 10 Sep 2024 14:09:37 +0530
From: Kalesh Anakkur Purayil <kalesh-anakkur.purayil@...adcom.com>
To: Jijie Shao <shaojijie@...wei.com>
Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, 
	pabeni@...hat.com, 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, 
	jonathan.cameron@...wei.com, shameerali.kolothum.thodi@...wei.com, 
	salil.mehta@...wei.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V9 net-next 11/11] net: add ndo_validate_addr check in dev_set_mac_address

On Tue, Sep 10, 2024 at 1:36 PM Jijie Shao <shaojijie@...wei.com> wrote:
>
> 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;
> +       }
[Kalesh] It would be better to move this code after
netif_device_present() check. Minor nit and there will not be any
functional impact.
>         if (!netif_device_present(dev))
>                 return -ENODEV;
>         err = dev_pre_changeaddr_notify(dev, sa->sa_data, extack);
> --
> 2.33.0
>


-- 
Regards,
Kalesh A P

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