netdev - Re: [PATCH] test_bpf: flag tests that cannot be jited on s390

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Message-ID: <CAPhsuW5hbF9K9U0G6oT2OYZVXsUiT=Xg+jUEFwhJn7sPx49Smw@mail.gmail.com>
Date:   Thu, 28 Jun 2018 10:31:07 -0700
From:   Song Liu <liu.song.a23@...il.com>
To:     Kleber Sacilotto de Souza <kleber.souza@...onical.com>
Cc:     linux-s390@...r.kernel.org, Networking <netdev@...r.kernel.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>
Subject: Re: [PATCH] test_bpf: flag tests that cannot be jited on s390

On Wed, Jun 27, 2018 at 8:19 AM, Kleber Sacilotto de Souza
<kleber.souza@...onical.com> wrote:
> Flag with FLAG_EXPECTED_FAIL the BPF_MAXINSNS tests that cannot be jited
> on s390 because they exceed BPF_SIZE_MAX and fail when
> CONFIG_BPF_JIT_ALWAYS_ON is set. Also set .expected_errcode to -ENOTSUPP
> so the tests pass in that case.
>
> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@...onical.com>

Acked-by: Song Liu <songliubraving@...com>

> ---
>  lib/test_bpf.c | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
>
> diff --git a/lib/test_bpf.c b/lib/test_bpf.c
> index 60aedc879361..08d3d59dca17 100644
> --- a/lib/test_bpf.c
> +++ b/lib/test_bpf.c
> @@ -5282,21 +5282,31 @@ static struct bpf_test tests[] = {
>         {       /* Mainly checking JIT here. */
>                 "BPF_MAXINSNS: Ctx heavy transformations",
>                 { },
> +#if defined(CONFIG_BPF_JIT_ALWAYS_ON) && defined(CONFIG_S390)
> +               CLASSIC | FLAG_EXPECTED_FAIL,
> +#else
>                 CLASSIC,
> +#endif
>                 { },
>                 {
>                         {  1, !!(SKB_VLAN_TCI & VLAN_TAG_PRESENT) },
>                         { 10, !!(SKB_VLAN_TCI & VLAN_TAG_PRESENT) }
>                 },
>                 .fill_helper = bpf_fill_maxinsns6,
> +               .expected_errcode = -ENOTSUPP,
>         },
>         {       /* Mainly checking JIT here. */
>                 "BPF_MAXINSNS: Call heavy transformations",
>                 { },
> +#if defined(CONFIG_BPF_JIT_ALWAYS_ON) && defined(CONFIG_S390)
> +               CLASSIC | FLAG_NO_DATA | FLAG_EXPECTED_FAIL,
> +#else
>                 CLASSIC | FLAG_NO_DATA,
> +#endif
>                 { },
>                 { { 1, 0 }, { 10, 0 } },
>                 .fill_helper = bpf_fill_maxinsns7,
> +               .expected_errcode = -ENOTSUPP,
>         },
>         {       /* Mainly checking JIT here. */
>                 "BPF_MAXINSNS: Jump heavy test",
> @@ -5347,18 +5357,28 @@ static struct bpf_test tests[] = {
>         {
>                 "BPF_MAXINSNS: exec all MSH",
>                 { },
> +#if defined(CONFIG_BPF_JIT_ALWAYS_ON) && defined(CONFIG_S390)
> +               CLASSIC | FLAG_EXPECTED_FAIL,
> +#else
>                 CLASSIC,
> +#endif
>                 { 0xfa, 0xfb, 0xfc, 0xfd, },
>                 { { 4, 0xababab83 } },
>                 .fill_helper = bpf_fill_maxinsns13,
> +               .expected_errcode = -ENOTSUPP,
>         },
>         {
>                 "BPF_MAXINSNS: ld_abs+get_processor_id",
>                 { },
> +#if defined(CONFIG_BPF_JIT_ALWAYS_ON) && defined(CONFIG_S390)
> +               CLASSIC | FLAG_EXPECTED_FAIL,
> +#else
>                 CLASSIC,
> +#endif
>                 { },
>                 { { 1, 0xbee } },
>                 .fill_helper = bpf_fill_ld_abs_get_processor_id,
> +               .expected_errcode = -ENOTSUPP,
>         },
>         /*
>          * LD_IND / LD_ABS on fragmented SKBs
> --
> 2.17.1
>