netdev - Re: [PATCH net-next] net: hsr: Add support for MC filtering at the slave device

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Date: Tue, 21 Nov 2023 09:47:37 +0530
From: Ravi Gunasekaran <r-gunasekaran@...com>
To: Wojciech Drewek <wojciech.drewek@...el.com>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>
CC: <bigeasy@...utronix.de>, <horms@...nel.org>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next] net: hsr: Add support for MC filtering at the
 slave device



On 11/20/2023 5:10 PM, Wojciech Drewek wrote:
>
> On 20.11.2023 12:01, Ravi Gunasekaran wrote:
>> From: Murali Karicheri <m-karicheri2@...com>
>>
>> When MC (multicast) list is updated by the networking layer due to a
>> user command and as well as when allmulti flag is set, it needs to be
>> passed to the enslaved Ethernet devices. This patch allows this
>> to happen by implementing ndo_change_rx_flags() and ndo_set_rx_mode()
>> API calls that in turns pass it to the slave devices using
>> existing API calls.
>>
>> Signed-off-by: Murali Karicheri <m-karicheri2@...com>
>> Signed-off-by: Ravi Gunasekaran <r-gunasekaran@...com>
>> ---
> One small nit, besides that:
> Reviewed-by: Wojciech Drewek <wojciech.drewek@...el.com>
>
>>  net/hsr/hsr_device.c | 67 +++++++++++++++++++++++++++++++++++++++++++-
>>  1 file changed, 66 insertions(+), 1 deletion(-)
>>
>> diff --git a/net/hsr/hsr_device.c b/net/hsr/hsr_device.c
>> index 306f942c3b28..4e8f4a3cefbf 100644
>> --- a/net/hsr/hsr_device.c
>> +++ b/net/hsr/hsr_device.c
>> @@ -173,7 +173,24 @@ static int hsr_dev_open(struct net_device *dev)
>>  
>>  static int hsr_dev_close(struct net_device *dev)
>>  {
>> -	/* Nothing to do here. */
>> +	struct hsr_port *port;
>> +	struct hsr_priv *hsr;
>> +
>> +	hsr = netdev_priv(dev);
>> +	hsr_for_each_port(hsr, port) {
>> +		if (port->type == HSR_PT_MASTER)
>> +			continue;
>> +		switch (port->type) {
>> +		case HSR_PT_SLAVE_A:
>> +		case HSR_PT_SLAVE_B:
>> +			dev_uc_unsync(port->dev, dev);
>> +			dev_mc_unsync(port->dev, dev);
>> +			break;
>> +		default:
>> +			break;
>> +		}
>> +	}
>> +
>>  	return 0;
>>  }
>>  
>> @@ -404,12 +421,60 @@ void hsr_del_ports(struct hsr_priv *hsr)
>>  		hsr_del_port(port);
>>  }
>>  
>> +static void hsr_ndo_set_rx_mode(struct net_device *dev)
> I wouldn't add "ndo" to the callback name, let's not stand out from other ndo callbacks here.

Thank you for reviewing the patch. I will address the above comment and send out
a v2.

>> +{
>> +	struct hsr_port *port;
>> +	struct hsr_priv *hsr;
>> +
>> +	hsr = netdev_priv(dev);
>> +
>> +	hsr_for_each_port(hsr, port) {
>> +		if (port->type == HSR_PT_MASTER)
>> +			continue;
>> +		switch (port->type) {
>> +		case HSR_PT_SLAVE_A:
>> +		case HSR_PT_SLAVE_B:
>> +			dev_mc_sync_multiple(port->dev, dev);
>> +			dev_uc_sync_multiple(port->dev, dev);
>> +			break;
>> +		default:
>> +			break;
>> +		}
>> +	}
>> +}
>> +
>> +static void hsr_change_rx_flags(struct net_device *dev, int change)
>> +{
>> +	struct hsr_port *port;
>> +	struct hsr_priv *hsr;
>> +
>> +	hsr = netdev_priv(dev);
>> +
>> +	hsr_for_each_port(hsr, port) {
>> +		if (port->type == HSR_PT_MASTER)
>> +			continue;
>> +		switch (port->type) {
>> +		case HSR_PT_SLAVE_A:
>> +		case HSR_PT_SLAVE_B:
>> +			if (change & IFF_ALLMULTI)
>> +				dev_set_allmulti(port->dev,
>> +						 dev->flags &
>> +						 IFF_ALLMULTI ? 1 : -1);
>> +			break;
>> +		default:
>> +			break;
>> +		}
>> +	}
>> +}
>> +
>>  static const struct net_device_ops hsr_device_ops = {
>>  	.ndo_change_mtu = hsr_dev_change_mtu,
>>  	.ndo_open = hsr_dev_open,
>>  	.ndo_stop = hsr_dev_close,
>>  	.ndo_start_xmit = hsr_dev_xmit,
>> +	.ndo_change_rx_flags = hsr_change_rx_flags,
>>  	.ndo_fix_features = hsr_fix_features,
>> +	.ndo_set_rx_mode = hsr_ndo_set_rx_mode,
>>  };
>>  
>>  static struct device_type hsr_type = {
>>
>> base-commit: 5a82d69d48c82e89aef44483d2a129f869f3506a