netdev - Re: selftests: bpf: test_libbpf.sh failed at file test

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Date:   Fri, 21 Jun 2019 11:17:52 -0500
From:   Dan Rue <dan.rue@...aro.org>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc:     Naresh Kamboju <naresh.kamboju@...aro.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        Netdev <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        xdp-newbies@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>, Martin Lau <kafai@...com>,
        Yonghong Song <yhs@...com>,
        john fastabend <john.fastabend@...il.com>, hawk@...nel.org,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Shuah Khan <shuah@...nel.org>
Subject: Re: selftests: bpf: test_libbpf.sh failed at file test_l4lb.o

On Thu, Jun 20, 2019 at 10:17:04PM -0700, Andrii Nakryiko wrote:
> On Thu, Jun 20, 2019 at 1:08 AM Naresh Kamboju
> <naresh.kamboju@...aro.org> wrote:
> >
> > selftests: bpf test_libbpf.sh failed running Linux -next kernel
> > 20190618 and 20190619.
> >
> > Here is the log from x86_64,
> > # selftests bpf test_libbpf.sh
> > bpf: test_libbpf.sh_ #
> > # [0] libbpf BTF is required, but is missing or corrupted.
> 
> You need at least clang-9.0.0 (not yet released) to run some of these
> tests successfully, as they rely on Clang's support for
> BTF_KIND_VAR/BTF_KIND_DATASEC.

Can there be a runtime check for BTF that emits a skip instead of a fail
in such a case?

Thanks,
Dan

> 
> > libbpf: BTF_is #
> > # test_libbpf failed at file test_l4lb.o
> > failed: at_file #
> > # selftests test_libbpf [FAILED]
> > test_libbpf: [FAILED]_ #
> > [FAIL] 29 selftests bpf test_libbpf.sh
> > selftests: bpf_test_libbpf.sh [FAIL]
> >
> > Full test log,
> > https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190619/testrun/781777/log
> >
> > Test results comparison,
> > https://qa-reports.linaro.org/lkft/linux-next-oe/tests/kselftest/bpf_test_libbpf.sh
> >
> > Good linux -next tag: next-20190617
> > Bad linux -next tag: next-20190618
> > git branch     master
> > git commit    1c6b40509daf5190b1fd2c758649f7df1da4827b
> > git repo
> > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> >
> > Best regards
> > Naresh Kamboju

-- 
Linaro - Kernel Validation