netdev - Re: [RFC] allow device to stop packet mirror behaviour

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Date:	Tue, 07 Aug 2007 18:06:07 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	johannes@...solutions.net
Cc:	netdev@...r.kernel.org, andy@...mcat.com,
	linux-wireless@...r.kernel.org
Subject: Re: [RFC] allow device to stop packet mirror behaviour

From: Johannes Berg <johannes@...solutions.net>
Date: Tue, 07 Aug 2007 10:25:55 +0200

> The only way to solve this problem therefore seems to be to suppress the
> mirroring out of the packet by dev_queue_xmit_nit(). The patch below
> does that by way of adding a new netdev flag.

Multicast packets also get looped back in a similar manner in the ipv4
code.  These will also be seen twice due to this issue.

There are probably many other examples as well, dev_queue_xmit_nit()
is just the tip of the iceberg.
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