netdev - Re: [PATCH] af_packet: add interframe drop cmsg (v5)

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Date:	Thu, 01 Oct 2009 13:54:02 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	nhorman@...driver.com
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH] af_packet: add interframe drop cmsg (v5)

From: Neil Horman <nhorman@...driver.com>
Date: Wed, 30 Sep 2009 13:04:10 -0400

> @@ -207,7 +207,8 @@ struct packet_sock {
>  };
>  
>  struct packet_skb_cb {
> -	unsigned int origlen;
> +	unsigned short origlen;
> +	unsigned short gap;
>  	union {
>  		struct sockaddr_pkt pkt;
>  		struct sockaddr_ll ll;

First of all, your commit message says the gap value is a u32
whereas the code uses a u16.

Secondly, this is going to break with IPV6 jumbo grams which
get us past the 64K barrier and thus whose lengths will exceed
what fits in an unsigned short.
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