netdev - Re: [PATCH net-next v2 2/5] net/mlx5e: Make the log friendly when decapsulation offload not supported

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Date:   Tue, 26 Feb 2019 13:50:37 +0000
From:   Roi Dayan <roid@...lanox.com>
To:     "xiangxia.m.yue@...il.com" <xiangxia.m.yue@...il.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        "gerlitz.or@...il.com" <gerlitz.or@...il.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next v2 2/5] net/mlx5e: Make the log friendly when
 decapsulation offload not supported



On 25/02/2019 12:40, xiangxia.m.yue@...il.com wrote:
> From: Tonghao Zhang <xiangxia.m.yue@...il.com>
> 
> If we try to offload decapsulation actions to VFs hw, we get the log [1].
> It's not friendly, because the kind of net device is null, and we don't
> know what '0' means.
> 
> [1] "mlx5_core 0000:05:01.2 vf_0: decapsulation offload is not supported for  net device (0)"
> 
> Signed-off-by: Tonghao Zhang <xiangxia.m.yue@...il.com>
> ---
>  drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
> index bdcc5e7..6cbfbfa 100644
> --- a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
> +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c
> @@ -84,7 +84,7 @@ static const char *mlx5e_netdev_kind(struct net_device *dev)
>  	if (dev->rtnl_link_ops)
>  		return dev->rtnl_link_ops->kind;
>  	else
> -		return "";
> +		return "unknown";
>  }
>  
>  static int mlx5e_route_lookup_ipv6(struct mlx5e_priv *priv,
> @@ -620,8 +620,10 @@ int mlx5e_tc_tun_parse(struct net_device *filter_dev,
>  						headers_c, headers_v);
>  	} else {
>  		netdev_warn(priv->netdev,
> -			    "decapsulation offload is not supported for %s net device (%d)\n",
> -			    mlx5e_netdev_kind(filter_dev), tunnel_type);
> +			    "decapsulation offload is not supported for %s (kind: \"%s\")\n",
> +			    netdev_name(filter_dev),
> +			    mlx5e_netdev_kind(filter_dev));
> +
>  		return -EOPNOTSUPP;
>  	}
>  	return err;
> 

Reviewed-by: Roi Dayan <roid@...lanox.com>