linux-kernel - Re: [PATCH] bpfilter: Fix build error with CONFIG_BPFILTER

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Date:   Fri, 16 Oct 2020 14:18:53 +0800
From:   Yuehaibing <yuehaibing@...wei.com>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        Jakub Kicinski <kuba@...nel.org>
CC:     "David S. Miller" <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andrii@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...omium.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Network Development <netdev@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] bpfilter: Fix build error with CONFIG_BPFILTER_UMH



On 2020/10/16 3:57, Alexei Starovoitov wrote:
> On Thu, Oct 15, 2020 at 12:26 PM Jakub Kicinski <kuba@...nel.org> wrote:
>>
>> On Thu, 15 Oct 2020 12:03:14 -0700 Alexei Starovoitov wrote:
>>> On Thu, Oct 15, 2020 at 11:56 AM Jakub Kicinski <kuba@...nel.org> wrote:
>>>> How so? It's using in-tree headers instead of system ones.
>>>> Many samples seem to be doing the same thing.
>>>
>>> There is no such thing as "usr/include" in the kernel build and source trees.
>>
>> Hm. I thought bpfilter somehow depends on make headers. But it doesn't
>> seem to. Reverting now.
> 
> Thanks!
> Right. To explain it a bit further for the author of the patch:
> Some samples makefiles use this -I usr/include pattern.
> That's different. This local "usr/include" is a result of 'make
> headers_install'.

I didn't notice this, sorry for the wrong fix.

> For samples and such it's ok to depend on that, but bpfilter is
> the part of the kernel build.
> It cannot depend on the 'make headers_install' step,
> so the fix has to be different.

Yes, this should rework.

> 
>>>>> Also please don't take bpf patches.
>>>>
>>>> You had it marked it as netdev in your patchwork :/
>>>
>>> It was delegated automatically by the patchwork system.
>>> I didn't have time to reassign, but you should have known better
>>> when you saw 'bpfilter' in the subject.
>>
>> The previous committers for bpfilter are almost all Dave, so I checked
>> your patchwork to make sure and it was netdev...
> 
> It was my fault. I was sloppy in the past and didn't pay enough attention
> to bpfilter and it started to bitrot because Dave was applying patches
> with his normal SLAs while I was silent.
> .
>