From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: [PATCH v6 net-next 4/6] bpf: enable bpf syscall on x64 and i386 Date: Tue, 26 Aug 2014 10:02:31 +0200 Message-ID: <20140826080231.GA20565@gmail.com> References: <1409014858-1410-1-git-send-email-ast@plumgrid.com> <1409014858-1410-5-git-send-email-ast@plumgrid.com> <20140825205201.10ac5ee3@uryu.home.lan> <20140826074655.GB19799@gmail.com> <53FC3E9A.1020108@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii 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 To: Daniel Borkmann Return-path: Content-Disposition: inline In-Reply-To: <53FC3E9A.1020108-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: netdev.vger.kernel.org * Daniel Borkmann wrote: > 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. I mean, if all the testing already exists, it should be part of an initial submission and such. Thanks, Ingo