linux-kernel - Re: [PATCH 5.10 373/575] selftests: bpf: Convert sk_lookup ctx access tests to PROG_TEST

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Message-ID: <d6740ddd-c154-0cba-9ab3-34b55822402a@linux.alibaba.com>
Date:   Thu, 28 Jul 2022 11:03:13 +0800
From:   Tianchen Ding <dtcccc@...ux.alibaba.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     ast@...nel.org, linux-kernel@...r.kernel.org, lmb@...udflare.com,
        sashal@...nel.org, stable@...r.kernel.org
Subject: Re: [PATCH 5.10 373/575] selftests: bpf: Convert sk_lookup ctx access
 tests to PROG_TEST_RUN

On 2022/7/27 18:10, Greg KH wrote:
> On Mon, Jul 25, 2022 at 10:53:38AM +0800, Tianchen Ding wrote:
>> Hi Greg.
>>
>> We found a compile error when building tools/testing/selftests/bpf/ on 5.10.
>>
>> tools/testing/selftests/bpf/prog_tests/sk_lookup.c:1092:15: error: 'struct bpf_sk_lookup' has no member named 'cookie'
>>   1092 |  if (CHECK(ctx.cookie == 0, "ctx.cookie", "no socket selected\n"))
>>
>> It requires 7c32e8f8bc33 ("bpf: Add PROG_TEST_RUN support for sk_lookup programs") from upstream.
>>
>> Maybe the left patches of this patchset are needed for 5.10 LTS?
>> https://lore.kernel.org/bpf/20210303101816.36774-1-lmb@cloudflare.com/
> 
> If so, please submit them with the git commit ids so that I can fix this
> up.
> 
> thanks,
> 
> greg k-h

These 2 commits from upstream are necessary for bpf selftests build pass on 5.10.y:
607b9cc92bd7208338d714a22b8082fe83bcb177 bpf: Consolidate shared test timing code
7c32e8f8bc33a5f4b113a630857e46634e3e143b bpf: Add PROG_TEST_RUN support for sk_lookup programs

This commit does not impact building stage, but can avoid a test case failure (by skipping it):
b4f894633fa14d7d46ba7676f950b90a401504bb selftests: bpf: Don't run sk_lookup in verifier tests

Thanks.