netdev - Re: [PATCH bpf-next 0/6] selftests/bpf: move sockopt tests under test

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Date:   Fri, 6 Sep 2019 08:18:08 -0700
From:   Stanislav Fomichev <sdf@...ichev.me>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Stanislav Fomichev <sdf@...gle.com>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Subject: Re: [PATCH bpf-next 0/6] selftests/bpf: move sockopt tests under
 test_progs

On 09/06, Andrii Nakryiko wrote:
> On Wed, Sep 4, 2019 at 4:03 PM Alexei Starovoitov
> <alexei.starovoitov@...il.com> wrote:
> >
> > On Wed, Sep 04, 2019 at 09:25:03AM -0700, Stanislav Fomichev wrote:
> > > Now that test_progs is shaping into more generic test framework,
> > > let's convert sockopt tests to it. This requires adding
> > > a helper to create and join a cgroup first (test__join_cgroup).
> > > Since we already hijack stdout/stderr that shouldn't be
> > > a problem (cgroup helpers log to stderr).
> > >
> > > The rest of the patches just move sockopt tests files under prog_tests/
> > > and do the required small adjustments.
> >
> > Looks good. Thank you for working on it.
> > Could you de-verbose setsockopt test a bit?
> > #23/32 setsockopt: deny write ctx->retval:OK
> > #23/33 setsockopt: deny read ctx->retval:OK
> > #23/34 setsockopt: deny writing to ctx->optval:OK
> > #23/35 setsockopt: deny writing to ctx->optval_end:OK
> > #23/36 setsockopt: allow IP_TOS <= 128:OK
> > #23/37 setsockopt: deny IP_TOS > 128:OK
> > 37 subtests is a bit too much spam.
> 
> If we merged test_btf into test_progs, we'd have >150 subtests, which
> would be pretty verbose as well. But the benefit of subtest is that
> you can run just that sub-test and debug/verify just it, without all
> the rest stuff.
> 
> So I'm wondering, if too many lines of default output is the only
> problem, should we just not output per-subtest line by default?
Ack, we can output per-subtest line if it fails so it's easy to re-run;
otherwise, hiding by default sounds good. I'll prepare a v3 sometime
today; Alexei, let us know if you disagree.