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Date: Thu, 07 Mar 2024 11:29:45 +0100
From: Johannes Berg <johannes@...solutions.net>
To: Anton Ivanov <anton.ivanov@...bridgegreys.com>, Waqar Hameed
	 <waqar.hameed@...s.com>, Ingo Molnar <mingo@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org, 
	kernel@...s.com, Richard Weinberger <richard@....at>, 
	linux-um@...ts.infradead.org
Subject: Re: pcap-dbus.o:undefined reference to `dbus_message_demarshal'

On Thu, 2024-03-07 at 10:27 +0000, Anton Ivanov wrote:
> > 
> > How's that required to be formatted and loaded? tcpdump itself can also
> > dump the filter in BPF format, with -d/-ddd (-dd is a C representation,
> > so probably not useful). Perhaps we could even automatically call
> > 'tcpdump' at runtime?
> 
> That is one option.
> 
> As far as common use cases are concerned, at present you can:
> 
> tcpdump -ddd, convert it to raw binary (3 liner in a language of choice) and pass that to vecX as a bpffile=
> 
> It may be worth it to make vecX also take the -ddd format directly by adding "format" options to bpffile.
> 
> I'd rather do that instead of invoking tcpdump out of a device open. The -ddd notation (+/- a comma here and there) is
> standard - it is also used by iptables, etc. It can used by other code generators as well.

Yeah, that makes sense, this is all kind of special configuration
anyway, and given that it's been broken forever ...

I actually doubt anyone would scream if we just removed it, so maybe
just remove it and if they do scream, point to the above, including said
3-liner in the response?

johannes

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