netdev - Re: [PATCH bpf-next] selftests/bpf: integrate verbose verifier log into test

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Message-ID: <CAADnVQK9XT1s36r4mj2HHj9M2W307qdgrURhwEPm_LO3S2vVhQ@mail.gmail.com>
Date:   Thu, 21 Nov 2019 09:02:07 -0800
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Andrii Nakryiko <andriin@...com>
Cc:     bpf <bpf@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii.nakryiko@...il.com>,
        Kernel Team <kernel-team@...com>
Subject: Re: [PATCH bpf-next] selftests/bpf: integrate verbose verifier log
 into test_progs

On Tue, Nov 19, 2019 at 4:36 PM Andrii Nakryiko <andriin@...com> wrote:
>
> Add exra level of verboseness, activated by -vvv argument. When -vv is
> specified, verbose libbpf and verifier log (level 1) is output, even for
> successful tests. With -vvv, verifier log goes to level 2.
>
> This is extremely useful to debug verifier failures, as well as just see the
> state and flow of verification. Before this, you'd have to go and modify
> load_program()'s source code inside libbpf to specify extra log_level flags,
> which is suboptimal to say the least.
>
> Currently -vv and -vvv triggering verifier output is integrated into
> test_stub's bpf_prog_load as well as bpf_verif_scale.c tests.
>
> Signed-off-by: Andrii Nakryiko <andriin@...com>

Applied. Thanks