linux-kernel - Re: [PATCH v2 net-next 0/3] bpf: share helpers between tracing and networking

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Message-ID: <55827CF2.3000605@iogearbox.net>
Date:	Thu, 18 Jun 2015 10:10:26 +0200
From:	Daniel Borkmann <daniel@...earbox.net>
To:	Alexei Starovoitov <ast@...mgrid.com>,
	David Miller <davem@...emloft.net>
CC:	luto@...capital.net, mingo@...nel.org, rostedt@...dmis.org,
	wangnan0@...wei.com, lizefan@...wei.com,
	daniel.wagner@...-carit.de, linux-api@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 net-next 0/3] bpf: share helpers between tracing and
 networking

On 06/16/2015 07:10 PM, Alexei Starovoitov wrote:
...
> Ideally we would allow a blend of tracing and networking programs,
> then the best solution would be one or two stable tracepoints in
> networking stack where skb is visible and receiving/transmitting task
> is also visible, then skb->len and task->pid together would give nice
> foundation for accurate stats.

I think combining both seems interesting anyway, we need to find
a way to make this gluing of both worlds easy to use, though. It's
certainly interesting for stats/diagnostics, but one wouldn't be
able to use the current/future skb eBPF helpers from {cls,act}_bpf
in that context.
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