netdev - Re: [PATCH] flow_diseector: Add support for IPPROTO

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Message-ID: <1375117819.10515.8.camel@edumazet-glaptop>
Date:	Mon, 29 Jul 2013 10:10:19 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Tom Herbert <therbert@...gle.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org
Subject: Re: [PATCH] flow_diseector: Add support for IPPROTO_IPV6

On Mon, 2013-07-29 at 08:06 -0700, Tom Herbert wrote:
> Add support for dissecting flows in IPv6/IPv4 packets.
> 
> Signed-off-by: Tom Herbert <therbert@...gle.com>
> ---
>  net/core/flow_dissector.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
> index 00ee068..96901de 100644
> --- a/net/core/flow_dissector.c
> +++ b/net/core/flow_dissector.c
> @@ -139,7 +139,11 @@ ipv6:
>  		break;
>  	}
>  	case IPPROTO_IPIP:
> -		goto again;
> +		proto = __constant_htons(ETH_P_IP);
> +		goto ip;
> +	case IPPROTO_IPV6:
> +		proto = __constant_htons(ETH_P_IPV6);
> +		goto ipv6;
>  	default:
>  		break;
>  	}

It seems this patch makes two different changes, but changelog is vague.
(As if we were not dissecting flows in IPv4/IPv6 packets ...)

How about :

1) Fix a problem if IPIP is tunneled into IPv6
   Prior code assumed IPIP was encapsulated into IPv4 only. 

2) Add support for IPPROTO_IPV6

Thanks

BTW it looks like we do not support ETH_P_8021AD yet


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