linux-kernel - Re: [PATCH 1/2] net: dsa: Add flag for 802.1AD when adding VLAN for dsa switch and port

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Date:   Mon, 20 Jul 2020 13:44:41 +0300
From:   Nikolay Aleksandrov <nikolay@...ulusnetworks.com>
To:     hongbo.wang@....com, xiaoliang.yang_1@....com,
        allan.nielsen@...rochip.com, po.liu@....com,
        claudiu.manoil@....com, alexandru.marginean@....com,
        vladimir.oltean@....com, leoyang.li@....com, mingkai.hu@....com,
        andrew@...n.ch, f.fainelli@...il.com, vivien.didelot@...il.com,
        davem@...emloft.net, jiri@...nulli.us, idosch@...sch.org,
        kuba@...nel.org, vinicius.gomes@...el.com,
        roopa@...ulusnetworks.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, horatiu.vultur@...rochip.com,
        alexandre.belloni@...tlin.com, UNGLinuxDriver@...rochip.com,
        linux-devel@...ux.nxdi.nxp.com
Subject: Re: [PATCH 1/2] net: dsa: Add flag for 802.1AD when adding VLAN for
 dsa switch and port

On 20/07/2020 13:41, hongbo.wang@....com wrote:
> From: "hongbo.wang" <hongbo.wang@....com>
> 
> the following command can be supported:
> ip link add link swp1 name swp1.100 type vlan protocol 802.1ad id 100
> 
> Signed-off-by: hongbo.wang <hongbo.wang@....com>
> ---
>  include/uapi/linux/if_bridge.h | 1 +
>  net/dsa/slave.c                | 9 +++++++--
>  2 files changed, 8 insertions(+), 2 deletions(-)
> 

This is not bridge related at all, please leave its flags out of it.

Nacked-by: Nikolay Aleksandrov <nikolay@...ulusnetworks.com>



> diff --git a/include/uapi/linux/if_bridge.h b/include/uapi/linux/if_bridge.h
> index caa6914a3e53..ecd960aa65c7 100644
> --- a/include/uapi/linux/if_bridge.h
> +++ b/include/uapi/linux/if_bridge.h
> @@ -132,6 +132,7 @@ enum {
>  #define BRIDGE_VLAN_INFO_RANGE_END	(1<<4) /* VLAN is end of vlan range */
>  #define BRIDGE_VLAN_INFO_BRENTRY	(1<<5) /* Global bridge VLAN entry */
>  #define BRIDGE_VLAN_INFO_ONLY_OPTS	(1<<6) /* Skip create/delete/flags */
> +#define BRIDGE_VLAN_INFO_8021AD	(1<<7) /* VLAN is 802.1AD protocol */
>  
>  struct bridge_vlan_info {
>  	__u16 flags;
> diff --git a/net/dsa/slave.c b/net/dsa/slave.c
> index 4c7f086a047b..376d7ac5f1e5 100644
> --- a/net/dsa/slave.c
> +++ b/net/dsa/slave.c
> @@ -1232,6 +1232,7 @@ static int dsa_slave_get_ts_info(struct net_device *dev,
>  static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
>  				     u16 vid)
>  {
> +	u16 flags = 0;
>  	struct dsa_port *dp = dsa_slave_to_port(dev);
>  	struct bridge_vlan_info info;
>  	int ret;
> @@ -1252,7 +1253,10 @@ static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
>  			return -EBUSY;
>  	}
>  
> -	ret = dsa_port_vid_add(dp, vid, 0);
> +	if (ntohs(proto) == ETH_P_8021AD)
> +		flags |= BRIDGE_VLAN_INFO_8021AD;
> +
> +	ret = dsa_port_vid_add(dp, vid, flags);
>  	if (ret)
>  		return ret;
>  
> @@ -1744,7 +1748,8 @@ int dsa_slave_create(struct dsa_port *port)
>  
>  	slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
>  	if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
> -		slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
> +		slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
> +				       NETIF_F_HW_VLAN_STAG_FILTER;
>  	slave_dev->hw_features |= NETIF_F_HW_TC;
>  	slave_dev->features |= NETIF_F_LLTX;
>  	slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
>