netdev - Re: [patch 0/7] CAN: Add new PF_CAN protocol family, try #3

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Date:	Fri, 22 Jun 2007 14:34:49 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Urs Thuermann <urs@...ogud.escape.de>
CC:	David Miller <davem@...emloft.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Oliver Hartkopp <oliver.hartkopp@...kswagen.de>,
	Urs Thuermann <urs.thuermann@...kswagen.de>,
	netdev@...r.kernel.org
Subject: Re: [patch 0/7] CAN: Add new PF_CAN protocol family, try #3

Urs Thuermann wrote:
> * Use skb->iif instead of skb->cb to pass receiving interface from
>   raw_rcv() and bcm_rcv() up to raw_recvmsg() and bcm_recvmsg().

skb->iif doesn't necessarily point to the incoming network device
as seen seen by netif_receive_skb, for layered devices it currently
always points to the first interface that received a packet.

Its so far also only used for traffic classification, please explain
how you're using it and what values it is set to on which paths.
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