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net/mlx4_en: Advertize encapsulation offloads features only when VXLAN tunnel is set 

Currenly we only support Large-Send and TX checksum offloads for
encapsulated traffic of type VXLAN. We must make sure to advertize
these offloads up to the stack only when VXLAN tunnel is set.

Failing to do so, would mislead the the networking stack to assume
that the driver can offload the internal TX checksum for GRE packets
and other buggy schemes.

Reported-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Or Gerlitz 2014-11-09 14:25:39 +02:00 committed by David S. Miller
parent a815286b94
commit f4a1edd561
1 changed files with 14 additions and 8 deletions
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22
drivers/net/ethernet/mellanox/mlx4/en_netdev.c
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@ -2281,8 +2281,16 @@ static void mlx4_en_add_vxlan_offloads(struct work_struct *work)
ret = mlx4_SET_PORT_VXLAN(priv->mdev->dev, priv->port,
VXLAN_STEER_BY_OUTER_MAC, 1);
out:
if (ret)
if (ret) {
en_err(priv, "failed setting L2 tunnel configuration ret %d\n", ret);
return;
}
/* set offloads */
priv->dev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
NETIF_F_TSO | NETIF_F_GSO_UDP_TUNNEL;
priv->dev->hw_features |= NETIF_F_GSO_UDP_TUNNEL;
priv->dev->features |= NETIF_F_GSO_UDP_TUNNEL;
}
static void mlx4_en_del_vxlan_offloads(struct work_struct *work)
@ -2290,6 +2298,11 @@ static void mlx4_en_del_vxlan_offloads(struct work_struct *work)
int ret;
struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
vxlan_del_task);
/* unset offloads */
priv->dev->hw_enc_features &= ~(NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
NETIF_F_TSO | NETIF_F_GSO_UDP_TUNNEL);
priv->dev->hw_features &= ~NETIF_F_GSO_UDP_TUNNEL;
priv->dev->features &= ~NETIF_F_GSO_UDP_TUNNEL;
ret = mlx4_SET_PORT_VXLAN(priv->mdev->dev, priv->port,
VXLAN_STEER_BY_OUTER_MAC, 0);
@ -2568,13 +2581,6 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
if (mdev->dev->caps.steering_mode != MLX4_STEERING_MODE_A0)
dev->priv_flags |= IFF_UNICAST_FLT;
if (mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
dev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_RXCSUM |
NETIF_F_TSO | NETIF_F_GSO_UDP_TUNNEL;
dev->hw_features |= NETIF_F_GSO_UDP_TUNNEL;
dev->features |= NETIF_F_GSO_UDP_TUNNEL;
}
mdev->pndev[port] = dev;
netif_carrier_off(dev);