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Date: Thu, 02 Apr 2015 02:29:16 +0200 From: Hannes Frederic Sowa <hannes@...essinduktion.org> To: Daniel Borkmann <daniel@...earbox.net>, 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 Hey Daniel, On Thu, Apr 2, 2015, at 02:24, Daniel Borkmann wrote: > 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. Does receiving them via af_unix and spawning a new shell with the fds already open work? Bye, Hannes -- 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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