netdev - Re: [PATCH ipsec-next,v2 3/3] selftests/bpf: add xfrm

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Message-ID: <CAHsH6GsDmw5qNv-9u-DfOXaUgtaGhOesEveOvX5cVcnYmjtonA@mail.gmail.com>
Date:   Thu, 1 Dec 2022 22:48:35 +0200
From:   Eyal Birger <eyal.birger@...il.com>
To:     Martin KaFai Lau <martin.lau@...ux.dev>
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        linux-kselftest@...r.kernel.org, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        steffen.klassert@...unet.com, herbert@...dor.apana.org.au,
        andrii@...nel.org, daniel@...earbox.net, nicolas.dichtel@...nd.com,
        razor@...ckwall.org, mykolal@...com, ast@...nel.org,
        song@...nel.org, yhs@...com, john.fastabend@...il.com,
        kpsingh@...nel.org, sdf@...gle.com, haoluo@...gle.com,
        jolsa@...nel.org, shuah@...nel.org
Subject: Re: [PATCH ipsec-next,v2 3/3] selftests/bpf: add xfrm_info tests

On Thu, Dec 1, 2022 at 10:26 PM Martin KaFai Lau <martin.lau@...ux.dev> wrote:
>
> On 11/30/22 9:34 PM, Eyal Birger wrote:
> >>> +
> >>> +struct {
> >>> +     __uint(type, BPF_MAP_TYPE_ARRAY);
> >>> +     __uint(max_entries, 2);
> >>> +     __type(key, __u32);
> >>> +     __type(value, __u32);
> >>> +} dst_if_id_map SEC(".maps");
> >>
> >> It is easier to use global variables instead of a map.
> >
> > Would these be available for read/write from the test application (as the
> > map is currently populated/read from userspace)?
>
> Yes, through the skel->bss->...
> selftests/bpf/prog_tests/ has examples.

Oh this is very useful! I tested and indeed this works perfectly.
WIll use in v3.

Thanks!
Eyal.