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

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Date:	Wed, 8 Jun 2011 18:28:42 +0200
From:	Jiri Pirko <jpirko@...hat.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	David Miller <davem@...emloft.net>,
	shemminger@...ux-foundation.org, greearb@...delatech.com,
	nicolas.2p.debian@...il.com, xiaosuo@...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] vlan: Fix the ingress VLAN_FLAG_REORDER_HDR check v2

Thu, Jun 02, 2011 at 03:03:53PM CEST, ebiederm@...ssion.com wrote:
>
>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.

Why we can't remove this right away?
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