netdev - Re: [PATCH v2 1/2] selftests: net: Fix missing nat6to4.o when running udpgro

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Date:   Fri, 27 Jan 2023 14:10:35 +0000
From:   Andrei Gherzan <andrei.gherzan@...onical.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, Shuah Khan <shuah@...nel.org>,
        netdev@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
        Hangbin Liu <liuhangbin@...il.com>
Subject: Re: [PATCH v2 1/2] selftests: net: Fix missing nat6to4.o when
 running udpgro_frglist.sh

On 23/01/26 03:36PM, Jakub Kicinski wrote:
> On Thu, 26 Jan 2023 10:01:44 +0000 Andrei Gherzan wrote:
> > On 23/01/25 11:08PM, Jakub Kicinski wrote:
> > > On Wed, 25 Jan 2023 21:13:49 +0000 Andrei Gherzan wrote:  
> > > > The udpgro_frglist.sh uses nat6to4.o which is tested for existence in
> > > > bpf/nat6to4.o (relative to the script). This is where the object is
> > > > compiled. Even so, the script attempts to use it as part of tc with a
> > > > different path (../bpf/nat6to4.o). As a consequence, this fails the script:  
> > > 
> > > Is this a recent regression? Can you add a Fixes tag?  
> > 
> > This issue seems to be included from the beginning (edae34a3ed92). I can't say
> > why this was not seen before upstream but on our side, this test was disabled
> > internally due to lack of CC support in BPF programs. This was fixed in the
> > meanwhile in 837a3d66d698 (selftests: net: Add cross-compilation support for
> > BPF programs) and we found this issue while trying to reenable the test.
> > 
> > So if you think that is reasonable, I could add a Fixes tag for the initial 
> > script commit edae34a3ed92 (selftests net: add UDP GRO fraglist + bpf
> > self-tests) and push a v3.
> 
> We have queued commit 3c107f36db06 ("selftests/net: mv bpf/nat6to4.c 
> to net folder") in net-next, I think that should fix it, too?

That would fix it indeed. Thanks for the pointer.

> 
> > > What tree did you base this patch on? Doesn't seem to apply  
> > 
> > The patches were done on top of
> > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git, the master
> > branch - 948ef7bb70c4 (Merge tag 'modules-6.2-rc6' of
> > git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux). There is another
> > merge that happened in the meanwhile but the rebase works without issues. I can
> > send a rebased v3 if needed.
> 
> Could you try linux-next or net-next ?

I have sent a v3 rebased on linux-next, split out the remaining changes
and added a commit to fix some shellcheck warnings/errors.

-- 
Andrei Gherzan