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Date: Mon, 09 Jul 2012 12:32:35 +0400
From: "Alexander V. Chernikov" <melifaro@FreeBSD.org>
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To: Hiroki Sato <hrs@FreeBSD.org>
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Cc: svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org,
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Subject: Re: svn commit: r238277 - in head: etc/defaults etc/rc.d sbin/ipfw
 share/man/man5 sys/netinet/ipfw
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On 09.07.2012 12:08, Hiroki Sato wrote:
> "Alexander V. Chernikov"<melifaro@FreeBSD.org>  wrote
>    in<4FFA894D.9050104@FreeBSD.org>:
>
>   I meant there was no strong objection.  I am sorry for not commenting
>   your implementation, but at least for ipfw0 it is difficult to
>   decouple ifnet and bpf because the primary consumer is tcpdump(8),
>   which depends on NET_RT_IFLIST to find the target.  Probably your
tcpdump -i still works with interface name supplied.
>   solution can be used for usbdump(8).  The reason why I committed the
>   patch now is there are reports that these pseudo interfaces made some
>   applications confused and/or caused some performance degradation on
>   9.0R, and wanted to fix it in some way.
Do you plan to take this to 9.1 ?
>
>   I am still open for more sophisticated implementation and have no
>   objection to replace mine with it.  Do you have an idea about
>   converting it with a loadable module?
Personally I think that the right way is to add user<>kernel interface 
for requesting interface list since this is the most major stopper for 
doing BPF-only providers. However this should be discussed with rpaulo@ 
and delphij@ (so most probably this skips 9.1).

And, as fallback solution we can probably add separate ipfwlog module 
which is quite easy but much less clean.

>
> -- Hiroki