Subject: Re: [PATCH net-next 1/6] net: add new netdevice feature for tunnel offloading

From: Jiri Benc <[email-masked]>
Date: Fri, 30 Jun 2017 17:50:01 +0200

On Fri, 30 Jun 2017 15:19:45 +0200, Sabrina Dubroca wrote:
> This adds a new netdevice feature, so that tunnel offloading can be
> disabled by the administrator on some netdevices, using the
> "tunnel-offload" ethtool feature.
> 
> This feature is set for all devices that provide ndo_udp_tunnel_add.

This patchset looks great, Sabrina! A few comments below.

> --- a/include/linux/netdev_features.h
> +++ b/include/linux/netdev_features.h
> @@ -76,6 +76,7 @@ enum {
>  	NETIF_F_HW_TC_BIT,		/* Offload TC infrastructure */
>  	NETIF_F_HW_ESP_BIT,		/* Hardware ESP transformation offload */
>  	NETIF_F_HW_ESP_TX_CSUM_BIT,	/* ESP with TX checksum offload */
> +	NETIF_F_TUNNEL_OFFLOAD_BIT,     /* Tunnel offloads */

"Tunnel offload" is very broad. Could we be more specific, e.g. "RSS
tunnel offload" or such? NETIF_F_HW_TUNNEL_RSS?

> --- a/net/core/ethtool.c
> +++ b/net/core/ethtool.c
> @@ -106,6 +106,7 @@ static const char netdev_features_strings[NETDEV_FEATURE_COUNT][ETH_GSTRING_LEN]
>  	[NETIF_F_HW_TC_BIT] =		 "hw-tc-offload",
>  	[NETIF_F_HW_ESP_BIT] =		 "esp-hw-offload",
>  	[NETIF_F_HW_ESP_TX_CSUM_BIT] =	 "esp-tx-csum-hw-offload",
> +	[NETIF_F_TUNNEL_OFFLOAD_BIT] =	 "tunnel-offload",
>  };

And here, too. "rss-tunnel-offload"?

Thanks!

 Jiri