netdev - Re: [PATCH bpf-next v5 5/5] selftests: Add tests for automatic map pinning

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Date:   Fri, 1 Nov 2019 22:07:58 -0700
From:   Andrii Nakryiko <andrii.nakryiko@...il.com>
To:     Toke Høiland-Jørgensen <toke@...hat.com>
Cc:     Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        David Miller <davem@...emloft.net>,
        Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>
Subject: Re: [PATCH bpf-next v5 5/5] selftests: Add tests for automatic map pinning

On Fri, Nov 1, 2019 at 2:53 AM Toke Høiland-Jørgensen <toke@...hat.com> wrote:
>
> From: Toke Høiland-Jørgensen <toke@...hat.com>
>
> This adds a new BPF selftest to exercise the new automatic map pinning
> code.
>
> Acked-by: Andrii Nakryiko <andriin@...com>

I don't believe I acked this patch before, must have been added by
mistake. But either way thanks for improving tests and testing a good
variety of scenarios, I appreciate the work. Please fix bpf_object
leak below and keep my Acked-by :)

> Signed-off-by: Toke Høiland-Jørgensen <toke@...hat.com>
> ---
>  tools/testing/selftests/bpf/prog_tests/pinning.c   |  208 ++++++++++++++++++++
>  tools/testing/selftests/bpf/progs/test_pinning.c   |   31 +++
>  .../selftests/bpf/progs/test_pinning_invalid.c     |   16 ++
>  3 files changed, 255 insertions(+)
>  create mode 100644 tools/testing/selftests/bpf/prog_tests/pinning.c
>  create mode 100644 tools/testing/selftests/bpf/progs/test_pinning.c
>  create mode 100644 tools/testing/selftests/bpf/progs/test_pinning_invalid.c
>

[...]

> +       /* should fail because of map parameter mismatch */
> +       err = bpf_object__load(obj);
> +       if (CHECK(err != -EINVAL, "param mismatch load", "err %d errno %d\n", err, errno))
> +               goto out;
> +

You need to close obj here, before overwriting it below?

> +       /* test auto-pinning at custom path with open opt */
> +       obj = bpf_object__open_file(file, &opts);
> +       if (CHECK_FAIL(libbpf_get_error(obj))) {
> +               obj = NULL;
> +               goto out;
> +       }

[...]