netdev - Re: [PATCH v2] Re: problem with IPoA (CLIP), NAT, and VLANS

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Date:	Tue, 17 Feb 2009 12:05:24 +0100
From:	Karl Hiramoto <karl@...amoto.org>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org,
	netfilter@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH v2] Re: problem with IPoA (CLIP),  NAT, and VLANS



Jarek Poplawski wrote:
> Sorry:
> -----------------> take 2: changelog fix only
>
> vlan: Update skb->mac_header in __vlan_put_tag().
>
> After moving mac addresses in __vlan_put_tag() skb->mac_header needs
> to be updated.
>   
This works on IPoE.  I notice no change with or w/o this patch on IPoE
only routing.    However has no effect on the original problem i
reported with  IPoA --> NAT --> VLAN

Tested-by: Karl Hiramoto <karl@...amoto.org>

> Reported-by: Karl Hiramoto <karl@...amoto.org>
> Signed-off-by: Jarek Poplawski <jarkao2@...il.com>
> ---
>
>  include/linux/if_vlan.h |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
> index f8ff918..e1ff5b1 100644
> --- a/include/linux/if_vlan.h
> +++ b/include/linux/if_vlan.h
> @@ -210,6 +210,7 @@ static inline struct sk_buff *__vlan_put_tag(struct sk_buff *skb, u16 vlan_tci)
>  
>  	/* Move the mac addresses to the beginning of the new header. */
>  	memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN);
> +	skb->mac_header -= VLAN_HLEN;
>  
>  	/* first, the ethernet type */
>  	veth->h_vlan_proto = htons(ETH_P_8021Q);
>
> --
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>   

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