mlxsw: spectrum: Apply RIF configuration when joining a LAG

In case a router interface (RIF) is configured for a LAG, make sure its
configuration is applied on the new LAG member.
Signed-off-by: NIdo Schimmel <idosch@nvidia.com>
Reviewed-by: NJiri Pirko <jiri@nvidia.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

@@ -3595,7 +3595,8 @@ static int mlxsw_sp_port_lag_index_get(struct mlxsw_sp *mlxsw_sp,
 }
 
 static int mlxsw_sp_port_lag_join(struct mlxsw_sp_port *mlxsw_sp_port,
-				  struct net_device *lag_dev)
+				  struct net_device *lag_dev,
+				  struct netlink_ext_ack *extack)
 {
 	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
 	struct mlxsw_sp_upper *lag;
@@ -3631,8 +3632,20 @@ static int mlxsw_sp_port_lag_join(struct mlxsw_sp_port *mlxsw_sp_port,
 	if (mlxsw_sp_port->default_vlan->fid)
 		mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port->default_vlan);
 
+	/* Join a router interface configured on the LAG, if exists */
+	err = mlxsw_sp_port_vlan_router_join(mlxsw_sp_port->default_vlan,
+					     lag_dev, extack);
+	if (err)
+		goto err_router_join;
+
 	return 0;
 
+err_router_join:
+	lag->ref_count--;
+	mlxsw_sp_port->lagged = 0;
+	mlxsw_core_lag_mapping_clear(mlxsw_sp->core, lag_id,
+				     mlxsw_sp_port->local_port);
+	mlxsw_sp_lag_col_port_remove(mlxsw_sp_port, lag_id);
 err_col_port_add:
 	if (!lag->ref_count)
 		mlxsw_sp_lag_destroy(mlxsw_sp, lag_id);
@@ -3997,7 +4010,7 @@ static int mlxsw_sp_netdevice_port_upper_event(struct net_device *lower_dev,
 		} else if (netif_is_lag_master(upper_dev)) {
 			if (info->linking) {
 				err = mlxsw_sp_port_lag_join(mlxsw_sp_port,
-							     upper_dev);
+							     upper_dev, extack);
 			} else {
 				mlxsw_sp_port_lag_col_dist_disable(mlxsw_sp_port);
 				mlxsw_sp_port_lag_leave(mlxsw_sp_port,

drivers/net/ethernet/mellanox/mlxsw/spectrum.h

@@ -656,6 +656,10 @@ mlxsw_sp_netdevice_ipip_ul_event(struct mlxsw_sp *mlxsw_sp,
 				 struct net_device *l3_dev,
 				 unsigned long event,
 				 struct netdev_notifier_info *info);
+int
+mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan,
+			       struct net_device *l3_dev,
+			       struct netlink_ext_ack *extack);
 void
 mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan);
 void mlxsw_sp_rif_destroy_by_dev(struct mlxsw_sp *mlxsw_sp,

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c

@@ -7697,9 +7697,9 @@ static void mlxsw_sp_rif_subport_put(struct mlxsw_sp_rif *rif)
 }
 
 static int
-mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan,
-			       struct net_device *l3_dev,
-			       struct netlink_ext_ack *extack)
+__mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan,
+				 struct net_device *l3_dev,
+				 struct netlink_ext_ack *extack)
 {
 	struct mlxsw_sp_port *mlxsw_sp_port = mlxsw_sp_port_vlan->mlxsw_sp_port;
 	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port->mlxsw_sp;
@@ -7764,6 +7764,27 @@ __mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan)
 	mlxsw_sp_rif_subport_put(rif);
 }
 
+int
+mlxsw_sp_port_vlan_router_join(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan,
+			       struct net_device *l3_dev,
+			       struct netlink_ext_ack *extack)
+{
+	struct mlxsw_sp *mlxsw_sp = mlxsw_sp_port_vlan->mlxsw_sp_port->mlxsw_sp;
+	struct mlxsw_sp_rif *rif;
+	int err = 0;
+
+	mutex_lock(&mlxsw_sp->router->lock);
+	rif = mlxsw_sp_rif_find_by_dev(mlxsw_sp, l3_dev);
+	if (!rif)
+		goto out;
+
+	err = __mlxsw_sp_port_vlan_router_join(mlxsw_sp_port_vlan, l3_dev,
+					       extack);
+out:
+	mutex_unlock(&mlxsw_sp->router->lock);
+	return err;
+}
+
 void
 mlxsw_sp_port_vlan_router_leave(struct mlxsw_sp_port_vlan *mlxsw_sp_port_vlan)
 {
@@ -7788,8 +7809,8 @@ static int mlxsw_sp_inetaddr_port_vlan_event(struct net_device *l3_dev,
 
 	switch (event) {
 	case NETDEV_UP:
-		return mlxsw_sp_port_vlan_router_join(mlxsw_sp_port_vlan,
-						      l3_dev, extack);
+		return __mlxsw_sp_port_vlan_router_join(mlxsw_sp_port_vlan,
+							l3_dev, extack);
 	case NETDEV_DOWN:
 		__mlxsw_sp_port_vlan_router_leave(mlxsw_sp_port_vlan);
 		break;