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Date:	Tue, 26 Aug 2014 10:00:26 +0200
From:	Daniel Borkmann <>
To:	Ingo Molnar <>
CC:	Alexei Starovoitov <>,
	Stephen Hemminger <>,
	"David S. Miller" <>,
	Linus Torvalds <>,
	Andy Lutomirski <>,
	Steven Rostedt <>,
	Chema Gonzalez <>,
	Eric Dumazet <>,
	Peter Zijlstra <>,
	Brendan Gregg <>,
	Namhyung Kim <>,
	"H. Peter Anvin" <>,
	Andrew Morton <>,
	Kees Cook <>,
	Linux API <>,
	Network Development <>,
	LKML <>
Subject: Re: [PATCH v6 net-next 4/6] bpf: enable bpf syscall on x64 and i386

On 08/26/2014 09:46 AM, Ingo Molnar wrote:
> * Alexei Starovoitov <> wrote:
>> On Mon, Aug 25, 2014 at 8:52 PM, Stephen Hemminger
>> <> wrote:
>>> Per discussion at Kernel Summit. Every new syscall requires
>>> a manual page and test programs. We have had too many new syscalls
>>> that are DOA.
>> There is verifier testsuite that is testing eBPF verifier from userspace
>> via bpf syscall. Also there are multiple examples and libbpf.
>> I think test coverage for bpf syscall is quite substantial already.
> This is in tools/bpf/, right?

No, it contains a BPF JIT disasm, bpf assembler and a debugger, but the
last two are for the 'classic' BPF interface only. There's a test suite
for BPF/eBPF in general under lib/test_bpf.c, but so far it tests only
the current code w/o eBPF verifier.

That said, I think Alexei is referring to the examples et al from the
bigger previous proposed patch set.
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