netdev - Re: [PATCH net-next 3/9] IB/ipoib: Add support for acting as VIF

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Message-ID: <4FFD33B8.5010604@mellanox.com>
Date:	Wed, 11 Jul 2012 11:05:12 +0300
From:	Or Gerlitz <ogerlitz@...lanox.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	<davem@...emloft.net>, <roland@...nel.org>,
	<netdev@...r.kernel.org>, <ali@...lanox.com>,
	<sean.hefty@...el.com>, Erez Shitrit <erezsh@...lanox.co.il>
Subject: Re: [PATCH net-next 3/9] IB/ipoib: Add support for acting as VIF

On 7/10/2012 3:26 PM, Eric Dumazet wrote:
> On Tue, 2012-07-10 at 15:16 +0300, Or Gerlitz wrote:
>> The IPoIB code checks the VIF private flag on the RX path, and accoriding
>> to the value of the flag prepares the skb CB data, etc.
>>
>
> skb->cb[] can be destroyed in netif_receive_skb() / __netif_receive_skb()
>
> #ifdef CONFIG_NET_CLS_ACT
> 	skb = handle_ing(skb, &pt_prev, &ret, orig_dev);
> 	...
> #endif

Eric,

Can you elaborate a little further? we're not sure to see where 
skb->cb[] is touched on the flow
you pointed to.

Or.

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