netdev - [patch net-next 03/23] mlxsw: spectrum: Forbid LAG slave from having VLAN uppers

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Date:	Mon, 20 Jun 2016 23:04:01 +0200
From:	Jiri Pirko <jiri@...nulli.us>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, idosch@...lanox.com, eladr@...lanox.com,
	yotamg@...lanox.com, nogahf@...lanox.com, ogerlitz@...lanox.com
Subject: [patch net-next 03/23] mlxsw: spectrum: Forbid LAG slave from having VLAN uppers

From: Ido Schimmel <idosch@...lanox.com>

When a port netdev is put under LAG it cannot have VLAN upper devices,
so forbid that. The LAG device itself can have VLAN upper devices.

Signed-off-by: Ido Schimmel <idosch@...lanox.com>
Signed-off-by: Jiri Pirko <jiri@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/spectrum.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index b47e3fb..46c867f 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -3038,7 +3038,7 @@ static int mlxsw_sp_netdevice_port_upper_event(struct net_device *dev,
 		    !netif_is_lag_master(upper_dev) &&
 		    !netif_is_bridge_master(upper_dev))
 			return -EINVAL;
-		if (!info->master || !info->linking)
+		if (!info->linking)
 			break;
 		/* HW limitation forbids to put ports to multiple bridges. */
 		if (netif_is_bridge_master(upper_dev) &&
@@ -3048,6 +3048,11 @@ static int mlxsw_sp_netdevice_port_upper_event(struct net_device *dev,
 		    !mlxsw_sp_master_lag_check(mlxsw_sp, upper_dev,
 					       info->upper_info))
 			return -EINVAL;
+		if (netif_is_lag_master(upper_dev) && vlan_uses_dev(dev))
+			return -EINVAL;
+		if (netif_is_lag_port(dev) && is_vlan_dev(upper_dev) &&
+		    !netif_is_lag_master(vlan_dev_real_dev(upper_dev)))
+			return -EINVAL;
 		break;
 	case NETDEV_CHANGEUPPER:
 		upper_dev = info->upper_dev;
-- 
2.5.5