netdev - Re: [bpf-next PATCH 1/4] selftests/bpf: Move test_tcppbf_user into test

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Date:   Thu, 29 Oct 2020 17:39:44 -0700
From:   Alexander Duyck <alexander.duyck@...il.com>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc:     bpf <bpf@...r.kernel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin Lau <kafai@...com>,
        john fastabend <john.fastabend@...il.com>,
        Kernel Team <kernel-team@...com>,
        Networking <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Lawrence Brakmo <brakmo@...com>, alexanderduyck@...com
Subject: Re: [bpf-next PATCH 1/4] selftests/bpf: Move test_tcppbf_user into test_progs

On Thu, Oct 29, 2020 at 4:27 PM Andrii Nakryiko
<andrii.nakryiko@...il.com> wrote:
>
> On Wed, Oct 28, 2020 at 4:50 PM Alexander Duyck
> <alexander.duyck@...il.com> wrote:
> >
> > From: Alexander Duyck <alexanderduyck@...com>
> >
> > Recently a bug was missed due to the fact that test_tcpbpf_user is not a
> > part of test_progs. In order to prevent similar issues in the future move
> > the test functionality into test_progs. By doing this we can make certain
> > that it is a part of standard testing and will not be overlooked.
> >
> > As a part of moving the functionality into test_progs it is necessary to
> > integrate with the test_progs framework and to drop any redundant code.
> > This patch:
> > 1. Cleans up the include headers
> > 2. Dropped a duplicate definition of bpf_find_map
> > 3. Replaced printf calls with fprintf to stderr
> > 4. Renamed main to test_tcpbpf_user
> > 5. Dropped return value in favor of CHECK calls to check for errors
> >
> > Signed-off-by: Alexander Duyck <alexanderduyck@...com>
> > ---
> >  tools/testing/selftests/bpf/Makefile               |    3
> >  .../testing/selftests/bpf/prog_tests/tcpbpf_user.c |  138 +++++++++++++++++
> >  tools/testing/selftests/bpf/test_tcpbpf_user.c     |  165 --------------------
>
> Please remove the binary from .gitignore as well

Okay, I will update that.

> >  3 files changed, 139 insertions(+), 167 deletions(-)
> >  create mode 100644 tools/testing/selftests/bpf/prog_tests/tcpbpf_user.c
> >  delete mode 100644 tools/testing/selftests/bpf/test_tcpbpf_user.c
>
> if this file is mostly the same, then Git should be able to detect
> that this is a file rename. That will be captured in a diff explicitly
> and will minimize this patch significantly. Please double-check why
> this was not detected properly.
>
> [...]

I'll look into it. I hadn't noticed that the patch it generated is
different then the one I am looking at in stgit. When I am doing a stg
show in stgit it is listing it as a rename so I suspect it is a
setting somewhere that is likely assuming legacy support or something.
I'll get that straightened out before I submit a v2.

Thanks.

- Alex