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

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Message-Id: <20200720104119.19146-1-hongbo.wang@nxp.com>
Date:   Mon, 20 Jul 2020 18:41:18 +0800
From:   hongbo.wang@....com
To:     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,
        nikolay@...ulusnetworks.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
Cc:     "hongbo.wang" <hongbo.wang@....com>
Subject: [PATCH 1/2] net: dsa: Add flag for 802.1AD when adding VLAN for dsa  switch and port

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(-)

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;
-- 
2.17.1