Merge branch 'mv88e6xxx-vlan-filtering'

Vivien Didelot says:

====================
net: dsa: mv88e6xxx: implement VLAN filtering

This patchset fixes hardware bridging for non 802.1Q aware systems.

The mv88e6xxx DSA driver currently depends on CONFIG_VLAN_8021Q and
CONFIG_BRIDGE_VLAN_FILTERING enabled for correct bridging between switch ports.

Patch 1/9 adds support for the VLAN filtering switchdev attribute in DSA.

Patchs 2/9 and 3/9 add helper functions for the following patches.

Patchs 4/9 to 6/9 assign dynamic address databases to VLANs, ports, and
bridge groups (the lowest available FID is cleared and assigned), and thus
restore support for per-port FDB operations.

Patchs 7/9 to 9/9 refine ports isolation and setup 802.1Q on user demand.

With this patchset, ports get correctly bridged and the driver behaves as
expected, with or without 802.1Q support.

With CONFIG_VLAN_8021Q enabled, setting a default PVID to the bridge correctly
propagates the corresponding VLAN, in addition to the hardware bridging:

    # echo 42 > /sys/class/net/<bridge>/bridge/default_pvid

But considering CONFIG_BRIDGE_VLAN_FILTERING enabled, the hardware VLAN
filtering is enabled on all bridge members only when the user requests it:

    # echo 1 > /sys/class/net/<bridge>/bridge/vlan_filtering
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 0 deletions

diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index cde29239b60d..27bf03d11670 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -317,6 +317,24 @@ static int dsa_slave_stp_update(struct net_device *dev, u8 state)
 	return ret;
 }
 
+static int dsa_slave_vlan_filtering(struct net_device *dev,
+				    const struct switchdev_attr *attr,
+				    struct switchdev_trans *trans)
+{
+	struct dsa_slave_priv *p = netdev_priv(dev);
+	struct dsa_switch *ds = p->parent;
+
+	/* bridge skips -EOPNOTSUPP, so skip the prepare phase */
+	if (switchdev_trans_ph_prepare(trans))
+		return 0;
+
+	if (ds->drv->port_vlan_filtering)
+		return ds->drv->port_vlan_filtering(ds, p->port,
+						    attr->u.vlan_filtering);
+
+	return 0;
+}
+
 static int dsa_slave_port_attr_set(struct net_device *dev,
 				   const struct switchdev_attr *attr,
 				   struct switchdev_trans *trans)
@@ -333,6 +351,9 @@ static int dsa_slave_port_attr_set(struct net_device *dev,
 			ret = ds->drv->port_stp_update(ds, p->port,
 						       attr->u.stp_state);
 		break;
+	case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
+		ret = dsa_slave_vlan_filtering(dev, attr, trans);
+		break;
 	default:
 		ret = -EOPNOTSUPP;
 		break;