IB/mlx5: Port status track LAG master, when LAG is active

When LAG is active, port up/down events should be triggered
by tracking the LAG master, and not one of the two slave
netdevs.

In the same manner, ib_query_port() should return the details
of the LAG master.

Signed-off-by: Aviv Heller <avivh@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 70e7c8d..00a3616 100644 (file)
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -118,8 +118,17 @@ static int mlx5_netdev_event(struct notifier_block *this,
                break;
 
        case NETDEV_UP:
-       case NETDEV_DOWN:
-               if (ndev == ibdev->roce.netdev && ibdev->ib_active) {
+       case NETDEV_DOWN: {
+               struct net_device *lag_ndev = mlx5_lag_get_roce_netdev(ibdev->mdev);
+               struct net_device *upper = NULL;
+
+               if (lag_ndev) {
+                       upper = netdev_master_upper_dev_get(lag_ndev);
+                       dev_put(lag_ndev);
+               }
+
+               if ((upper == ndev || (!upper && ndev == ibdev->roce.netdev))
+                   && ibdev->ib_active) {
                        struct ib_event ibev = {0};
 
                        ibev.device = &ibdev->ib_dev;
@@ -129,6 +138,7 @@ static int mlx5_netdev_event(struct notifier_block *this,
                        ib_dispatch_event(&ibev);
                }
                break;
+       }
 
        default:
                break;
@@ -143,6 +153,10 @@ static struct net_device *mlx5_ib_get_netdev(struct ib_device *device,
        struct mlx5_ib_dev *ibdev = to_mdev(device);
        struct net_device *ndev;
 
+       ndev = mlx5_lag_get_roce_netdev(ibdev->mdev);
+       if (ndev)
+               return ndev;
+
        /* Ensure ndev does not disappear before we invoke dev_hold()
         */
        read_lock(&ibdev->roce.netdev_lock);
@@ -158,7 +172,7 @@ static int mlx5_query_port_roce(struct ib_device *device, u8 port_num,
                                struct ib_port_attr *props)
 {
        struct mlx5_ib_dev *dev = to_mdev(device);
-       struct net_device *ndev;
+       struct net_device *ndev, *upper;
        enum ib_mtu ndev_ib_mtu;
        u16 qkey_viol_cntr;
 
@@ -182,6 +196,17 @@ static int mlx5_query_port_roce(struct ib_device *device, u8 port_num,
        if (!ndev)
                return 0;
 
+       if (mlx5_lag_is_active(dev->mdev)) {
+               rcu_read_lock();
+               upper = netdev_master_upper_dev_get_rcu(ndev);
+               if (upper) {
+                       dev_put(ndev);
+                       ndev = upper;
+                       dev_hold(ndev);
+               }
+               rcu_read_unlock();
+       }
+
        if (netif_running(ndev) && netif_carrier_ok(ndev)) {
                props->state      = IB_PORT_ACTIVE;
                props->phys_state = 5;