netdev - Re: [PATCH v3] vlan: Fix the ingress VLAN_FLAG_REORDER

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Date:	Sat, 11 Jun 2011 08:05:37 +0800
From:	Changli Gao <xiaosuo@...il.com>
To:	Jiri Pirko <jpirko@...hat.com>
Cc:	David Miller <davem@...emloft.net>, pratnakarlx@...il.com,
	ebiederm@...ssion.com, shemminger@...ux-foundation.org,
	greearb@...delatech.com, nicolas.2p.debian@...il.com,
	netdev@...r.kernel.org, kaber@...sh.net, fubar@...ibm.com,
	eric.dumazet@...il.com, andy@...yhouse.net, jesse@...ira.com
Subject: Re: [PATCH v3] vlan: Fix the ingress VLAN_FLAG_REORDER_HDR check

On Sat, Jun 11, 2011 at 12:56 AM, Jiri Pirko <jpirko@...hat.com> wrote:
> This time heavily based on Eric's V2. mac_len is reset at appropriate
> places. Also skb->data is adjusted to point to beginning of mac header
> before calling vlan_insert_tag.
>
> Please review (fingers crossed).
>
> Subject: [patch net-2.6 v2.1] vlan: Fix the ingress VLAN_FLAG_REORDER_HDR check
>
> Testing of VLAN_FLAG_REORDER_HDR does not belong in vlan_untag
> but rather in vlan_do_receive.  Otherwise the vlan header
> will not be properly put on the packet in the case of
> vlan header accelleration.
>
> As we remove the check from vlan_check_reorder_header
> rename it vlan_reorder_header to keep the naming clean.
>
> Fix up the skb->pkt_type early so we don't look at the packet
> after adding the vlan tag, which guarantees we don't goof
> and look at the wrong field.
>
> Use a simple if statement instead of a complicated switch
> statement to decided that we need to increment rx_stats
> for a multicast packet.
>
> Hopefully at somepoint we will just declare the case where
> VLAN_FLAG_REORDER_HDR is cleared as unsupported and remove
> the code.  Until then this keeps it working correctly.
>
> Signed-off-by: Eric W. Biederman <ebiederm@...ssion.com>
> Signed-off-by: Jiri Pirko <jpirko@...hat.com>
Acked-by: Changli Gao <xiaosuo@...il.com>

-- 
Regards,
Changli Gao(xiaosuo@...il.com)
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