linux-kernel - Re: [PATCH bpf-next v3 00/14] selftests/bpf: Integrate test_xsk.c to test

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Message-ID: <aLmfXuSwtQgwrCRC@boxer>
Date: Thu, 4 Sep 2025 16:17:02 +0200
From: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
To: "Bastien Curutchet (eBPF Foundation)" <bastien.curutchet@...tlin.com>
CC: Björn Töpel <bjorn@...nel.org>, Magnus Karlsson
	<magnus.karlsson@...el.com>, Jonathan Lemon <jonathan.lemon@...il.com>,
	Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>,
	Andrii Nakryiko <andrii@...nel.org>, Martin KaFai Lau <martin.lau@...ux.dev>,
	Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, "Yonghong
 Song" <yonghong.song@...ux.dev>, John Fastabend <john.fastabend@...il.com>,
	"KP Singh" <kpsingh@...nel.org>, Stanislav Fomichev <sdf@...ichev.me>, Hao
 Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>, Mykola Lysenko
	<mykolal@...com>, Shuah Khan <shuah@...nel.org>, "David S. Miller"
	<davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, "Jesper Dangaard
 Brouer" <hawk@...nel.org>, Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	Alexis Lothore <alexis.lothore@...tlin.com>, <netdev@...r.kernel.org>,
	<bpf@...r.kernel.org>, <linux-kselftest@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf-next v3 00/14] selftests/bpf: Integrate test_xsk.c to
 test_progs framework

On Thu, Sep 04, 2025 at 12:10:15PM +0200, Bastien Curutchet (eBPF Foundation) wrote:
> Hi all,
> 
> This is a second version of a series I sent some time ago, it continues
> the work of migrating the script tests into prog_tests.
> 
> The test_xsk.sh script covers many AF_XDP use cases. The tests it runs
> are defined in xksxceiver.c. Since this script is used to test real
> hardware, the goal here is to leave it as it is, and only integrate the
> tests that run on veth peers into the test_progs framework.
> 
> Some tests are flaky so they can't be integrated in the CI as they are.
> I think that fixing their flakyness would require a significant amount of
> work. So, as first step, I've excluded them from the list of tests
> migrated to the CI (see PATCH 13). If these tests get fixed at some
> point, integrating them into the CI will be straightforward.
> 
> PATCH 1 extracts test_xsk[.c/.h] from xskxceiver[.c/.h] to make the
> tests available to test_progs.
> PATCH 2 to 5 fix small issues in the current test
> PATCH 7 to 12 handle all errors to release resources instead of calling
> exit() when any error occurs.
> PATCH 13 isolates some flaky tests
> PATCH 14 integrate the non-flaky tests to the test_progs framework
> 
> Maciej, I've fixed the bug you found in the initial series. I've
> looked for any hardware able to run test_xsk.sh in my office, but I
> couldn't find one ... So here again, only the veth part has been tested,
> sorry about that.

Hi Bastien,

just a heads up, I won't be able to review this until 15 sept. If anyone
else would pick this up earlier then good, otherwise please stay patient
:)

> 
> Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@...tlin.com>
> ---
> Changes in v3:
> - Rebase on latest bpf-next_base to integrate commit c9110e6f7237 ("selftests/bpf:
> Fix count write in testapp_xdp_metadata_copy()").
> - Move XDP_METADATA_COPY_* tests from flaky-tests to nominal tests
> - Link to v2: https://lore.kernel.org/r/20250902-xsk-v2-0-17c6345d5215@bootlin.com
> 
> Changes in v2:
> - Rebase on the latest bpf-next_base and integrate the newly added tests
>   to the work (adjust_tail* and tx_queue_consumer tests)
> - Re-order patches to split xkxceiver sooner.
> - Fix the bug reported by Maciej.
> - Fix verbose mode in test_xsk.sh by keeping kselftest (remove PATCH 1,
>   7 and 8)
> - Link to v1: https://lore.kernel.org/r/20250313-xsk-v1-0-7374729a93b9@bootlin.com
> 
> ---
> Bastien Curutchet (eBPF Foundation) (14):
>       selftests/bpf: test_xsk: Split xskxceiver
>       selftests/bpf: test_xsk: Initialize bitmap before use
>       selftests/bpf: test_xsk: Fix memory leaks
>       selftests/bpf: test_xsk: Wrap test clean-up in functions
>       selftests/bpf: test_xsk: Release resources when swap fails
>       selftests/bpf: test_xsk: Add return value to init_iface()
>       selftests/bpf: test_xsk: Don't exit immediately when xsk_attach fails
>       selftests/bpf: test_xsk: Don't exit immediately when gettimeofday fails
>       selftests/bpf: test_xsk: Don't exit immediately when workers fail
>       selftests/bpf: test_xsk: Don't exit immediately if validate_traffic fails
>       selftests/bpf: test_xsk: Don't exit immediately on allocation failures
>       selftests/bpf: test_xsk: Move exit_with_error to xskxceiver.c
>       selftests/bpf: test_xsk: Isolate flaky tests
>       selftests/bpf: test_xsk: Integrate test_xsk.c to test_progs framework
> 
>  tools/testing/selftests/bpf/Makefile              |   11 +-
>  tools/testing/selftests/bpf/prog_tests/test_xsk.c | 2604 ++++++++++++++++++++
>  tools/testing/selftests/bpf/prog_tests/test_xsk.h |  294 +++
>  tools/testing/selftests/bpf/prog_tests/xsk.c      |  146 ++
>  tools/testing/selftests/bpf/xskxceiver.c          | 2685 +--------------------
>  tools/testing/selftests/bpf/xskxceiver.h          |  156 --
>  6 files changed, 3170 insertions(+), 2726 deletions(-)
> ---
> base-commit: e4e08c130231eb8071153ab5f056874d8f70430b
> change-id: 20250218-xsk-0cf90e975d14
> 
> Best regards,
> -- 
> Bastien Curutchet (eBPF Foundation) <bastien.curutchet@...tlin.com>
>