linux-kernel - Re: Re: [PATCH bpf-next] selftests/bpf: Fix error undeclared identifier 'NF_NAT_MANIP

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Message-ID: <tencent_0316F265A5CADBEBFCA811E28E019A106806@qq.com>
Date:   Thu, 17 Nov 2022 22:15:52 +0800
From:   Rong Tao <rtoax@...mail.com>
To:     andrii.nakryiko@...il.com
Cc:     andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org,
        daniel@...earbox.net, dxu@...uu.xyz, haoluo@...gle.com,
        john.fastabend@...il.com, jolsa@...nel.org, kpsingh@...nel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        lkp@...el.com, lorenzo@...nel.org, martin.lau@...ux.dev,
        memxor@...il.com, mykolal@...com, rongtao@...tc.cn,
        rtoax@...mail.com, sdf@...gle.com, shuah@...nel.org,
        song@...nel.org, yhs@...com
Subject: Re: Re: [PATCH bpf-next] selftests/bpf: Fix error undeclared identifier 'NF_NAT_MANIP_SRC'

First of all, thank you all for your suggestions on this compilation
issue.

> It does break CI ([0]). We could use BPF CO-RE and ___suffix rule to
> avoid this. But we can also say that selftests/bpf/config{,<arch>} has
> to be used by bots that want to build BPF selftests.
>
>  [0] https://github.com/kernel-patches/bpf/actions/runs/3446651033/jobs/5752592868

I try to use bpf_core_enum_value_exists() and bpf_core_enum_value(), However, 
as far as my knowledge is concerned, I have to redefine a NF_NAT_MANIP_SRC 
enumeration, but this would conflict with the situation where there is no 
secondary compilation problem. How do I fix this with CO-RE, it seems that 
there is no similar CO-RE+ __suffix solution for enumerations in selftests. 
Can you give me some tips or help me?