netdev - Re: [PATCH v3 net-next 1/4] flow_keys: include thoff into flow

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Date:	Tue, 19 Mar 2013 09:41:55 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Daniel Borkmann <dborkman@...hat.com>
Cc:	netdev@...r.kernel.org, davem@...emloft.net
Subject: Re: [PATCH v3 net-next 1/4] flow_keys: include thoff into flow_keys
 for later usage

On Tue, 2013-03-19 at 17:39 +0100, Daniel Borkmann wrote:
> In skb_flow_dissect(), we perform a dissection of a skbuff. Since we're
> doing the work here anyway, also store thoff for a later usage, e.g. in
> the BPF filter.
> 
> Suggested-by: Eric Dumazet <edumazet@...gle.com>
> Signed-off-by: Daniel Borkmann <dborkman@...hat.com>
> ---
>  This patch also needs to go into the net tree, since Eric or Jason will
>  post a bug fix on top of this one.
> 
>  include/net/flow_keys.h   | 1 +
>  net/core/flow_dissector.c | 2 ++
>  2 files changed, 3 insertions(+)
> 
> diff --git a/include/net/flow_keys.h b/include/net/flow_keys.h
> index 80461c1..bb8271d 100644
> --- a/include/net/flow_keys.h
> +++ b/include/net/flow_keys.h
> @@ -9,6 +9,7 @@ struct flow_keys {
>  		__be32 ports;
>  		__be16 port16[2];
>  	};
> +	u16 thoff;
>  	u8 ip_proto;
>  };
>  
> diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
> index f8d9e03..f4be293 100644
> --- a/net/core/flow_dissector.c
> +++ b/net/core/flow_dissector.c
> @@ -151,6 +151,8 @@ ipv6:
>  			flow->ports = *ports;
>  	}
>  
> +	flow->thoff = (u16) nhoff;
> +
>  	return true;
>  }
>  EXPORT_SYMBOL(skb_flow_dissect);

Signed-off-by: Eric Dumazet <edumazet@...gle.com>


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