netdev - Re: [PATCH v3 RESEND] net: hsr: Provide RedBox support

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Date: Wed, 27 Mar 2024 09:05:12 +0530
From: Ratheesh Kannoth <rkannoth@...vell.com>
To: Lukasz Majewski <lukma@...x.de>
CC: <netdev@...r.kernel.org>, Andrew Lunn <andrew@...n.ch>,
        Eric Dumazet
	<edumazet@...gle.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller"
	<davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Oleksij Rempel
	<o.rempel@...gutronix.de>, <Tristram.Ha@...rochip.com>,
        Sebastian Andrzej
 Siewior <bigeasy@...utronix.de>,
        Paolo Abeni <pabeni@...hat.com>,
        Ravi
 Gunasekaran <r-gunasekaran@...com>,
        Simon Horman <horms@...nel.org>,
        Nikita
 Zhandarovich <n.zhandarovich@...tech.ru>,
        Murali Karicheri
	<m-karicheri2@...com>, Jiri Pirko <jiri@...nulli.us>,
        Dan Carpenter
	<dan.carpenter@...aro.org>,
        Ziyang Xuan <william.xuanziyang@...wei.com>,
        Shigeru Yoshida <syoshida@...hat.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 RESEND] net: hsr: Provide RedBox support

On 2024-03-26 at 14:32:20, Lukasz Majewski (lukma@...x.de) wrote:
> --- a/net/hsr/hsr_device.h
> +++ b/net/hsr/hsr_device.h
> @@ -16,8 +16,8 @@
>  void hsr_del_ports(struct hsr_priv *hsr);
>  void hsr_dev_setup(struct net_device *dev);
>  int hsr_dev_finalize(struct net_device *hsr_dev, struct net_device *slave[2],
> -		     unsigned char multicast_spec, u8 protocol_version,
> -		     struct netlink_ext_ack *extack);
> +		     struct net_device *interlink, unsigned char multicast_spec,
> +		     u8 protocol_version, struct netlink_ext_ack *extack);
>  void hsr_check_carrier_and_operstate(struct hsr_priv *hsr);
>  int hsr_get_max_mtu(struct hsr_priv *hsr);
>  #endif /* __HSR_DEVICE_H */
> diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c
> index 5d68cb181695..7c5a4bda1cca 100644
> --- a/net/hsr/hsr_forward.c
> +++ b/net/hsr/hsr_forward.c
> @@ -377,6 +377,15 @@ static int hsr_xmit(struct sk_buff *skb, struct hsr_port *port,
>  		 */
>  		ether_addr_copy(eth_hdr(skb)->h_source, port->dev->dev_addr);
>  	}
> +
> +	/* When HSR node is used as RedBox - the frame received from HSR ring
> +	 * requires source MAC address (SA) replacement to one which can be
> +	 * recognized by SAN devices (otherwise, frames are dropped by switch)
> +	 */
> +	if (port->type == HSR_PT_INTERLINK)
> +		memcpy(&eth_hdr(skb)->h_source, port->hsr->macaddress_redbox,
> +		       ETH_ALEN);
why not ether_addr_copy here too ?