netdev - Re: [PATCH v2 net-next] ipv[4|6]: correct dropwatch false positive in local_deliver

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Message-ID: <1362160604.15793.57.camel@edumazet-glaptop>
Date:	Fri, 01 Mar 2013 09:56:44 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Neil Horman <nhorman@...driver.com>
Cc:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	William Reich <reich@...icom.com>
Subject: Re: [PATCH v2 net-next] ipv[4|6]: correct dropwatch false positive
 in local_deliver_finish

On Fri, 2013-03-01 at 12:44 -0500, Neil Horman wrote:
> I had a report recently of a user trying to use dropwatch to localise some frame
> loss, and they were getting false positives.  Turned out they were using a user
> space SCTP stack that used raw sockets to grab frames.  When we don't have a
> registered protocol for a given packet, we record it as a drop, even if a raw
> socket receieves the frame.  We should only record the drop in the event a raw
> socket doesnt exist to receive the frames
> 
> Tested by the reported successfully
> 
> Signed-off-by: Neil Horman <nhorman@...driver.com>
> Reported-by: William Reich <reich@...icom.com>
> Tested-by: William Reich <reich@...icom.com>
> CC: "David S. Miller" <davem@...emloft.net>
> CC: William Reich <reich@...icom.com>
> CC: eric.dumazet@...il.com
> ---
>  net/ipv4/ip_input.c  | 6 ++++--
>  net/ipv6/ip6_input.c | 6 ++++--
>  2 files changed, 8 insertions(+), 4 deletions(-)

Thanks !

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


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