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Date: Thu, 02 Apr 2015 02:24:13 +0200 From: Daniel Borkmann <daniel@...earbox.net> To: Hannes Frederic Sowa <hannes@...essinduktion.org>, stephen@...workplumber.org CC: ast@...mgrid.com, jiri@...nulli.us, tgraf@...g.ch, netdev@...r.kernel.org, Jamal Hadi Salim <jhs@...atatu.com> Subject: Re: [PATCH iproute2 -next] tc, bpf: finalize eBPF support for cls and act front-end Hi Hannes, On 04/02/2015 02:13 AM, Hannes Frederic Sowa wrote: ... > Maybe a small utility programs like: > > bpf (--lookup|--update|--delete|--get-next-key) -fd > filedescriptor-number (type conversion parameters here) key [value] > > So it can be easily used by shell scripts. > > For that the filedescriptor numbers would need to be exported (already > opened) into a spawned shell and the numbers could be specified either > in environment or just by printing text which can be sourced by shells > (we already talked about the maybe exec 5</proc/pid/fd/1234 idea). Seems > this can be just build ontop this current patch by extending the > bpf-agent you already build, no? I was thinking about that and trying it out, but as far as I can tell, due to the anon inodes that are currently underlying as the fd provider, it doesn't work w/o larger kernel changes. So, the file descriptor passing is currently the only way to transfer control. Cheers, Daniel -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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