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

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Message-ID: <917db515-072c-31d5-1cd2-b28bc40f7bd4@linux.dev>
Date:   Thu, 1 Dec 2022 12:26:14 -0800
From:   Martin KaFai Lau <martin.lau@...ux.dev>
To:     Eyal Birger <eyal.birger@...il.com>
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 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.