netdev - Re: [PATCH bpf-next 2/2] selftests: xsk: Add test case for packets at end of UMEM

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Date:   Tue, 4 Apr 2023 08:27:46 +0200
From:   Magnus Karlsson <magnus.karlsson@...il.com>
To:     Kal Conley <kal.conley@...tris.com>
Cc:     Björn Töpel <bjorn@...nel.org>,
        Magnus Karlsson <magnus.karlsson@...el.com>,
        Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Mykola Lysenko <mykolal@...com>, Shuah Khan <shuah@...nel.org>,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH bpf-next 2/2] selftests: xsk: Add test case for packets at
 end of UMEM

On Mon, 3 Apr 2023 at 16:52, Kal Conley <kal.conley@...tris.com> wrote:
>
> Add test case to testapp_invalid_desc for valid packets at the end of
> the UMEM.

Thanks.

Acked-by: Magnus Karlsson <magnus.karlsson@...el.com>

> Signed-off-by: Kal Conley <kal.conley@...tris.com>
> ---
>  tools/testing/selftests/bpf/xskxceiver.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/xskxceiver.c b/tools/testing/selftests/bpf/xskxceiver.c
> index 3956f5db84f3..34a1f32fe752 100644
> --- a/tools/testing/selftests/bpf/xskxceiver.c
> +++ b/tools/testing/selftests/bpf/xskxceiver.c
> @@ -1662,6 +1662,8 @@ static void testapp_invalid_desc(struct test_spec *test)
>                 {-2, PKT_SIZE, 0, false},
>                 /* Packet too large */
>                 {0x2000, XSK_UMEM__INVALID_FRAME_SIZE, 0, false},
> +               /* Up to end of umem allowed */
> +               {umem_size - PKT_SIZE, PKT_SIZE, 0, true},
>                 /* After umem ends */
>                 {umem_size, PKT_SIZE, 0, false},
>                 /* Straddle the end of umem */
> @@ -1675,16 +1677,17 @@ static void testapp_invalid_desc(struct test_spec *test)
>
>         if (test->ifobj_tx->umem->unaligned_mode) {
>                 /* Crossing a page boundrary allowed */
> -               pkts[6].valid = true;
> +               pkts[7].valid = true;
>         }
>         if (test->ifobj_tx->umem->frame_size == XSK_UMEM__DEFAULT_FRAME_SIZE / 2) {
>                 /* Crossing a 2K frame size boundrary not allowed */
> -               pkts[7].valid = false;
> +               pkts[8].valid = false;
>         }
>
>         if (test->ifobj_tx->shared_umem) {
>                 pkts[4].addr += umem_size;
>                 pkts[5].addr += umem_size;
> +               pkts[6].addr += umem_size;
>         }
>
>         pkt_stream_generate_custom(test, pkts, ARRAY_SIZE(pkts));
> --
> 2.39.2
>