linux-kernel - [PATCH bpf-next v2 0/2] selftests: bpf: Migrate test_xdp_meta.sh to test

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Message-Id: <20241213-xdp_meta-v2-0-634582725b90@bootlin.com>
Date: Fri, 13 Dec 2024 16:06:19 +0100
From: Bastien Curutchet <bastien.curutchet@...tlin.com>
To: Alexei Starovoitov <ast@...nel.org>, 
 Daniel Borkmann <daniel@...earbox.net>, 
 "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, 
 Jesper Dangaard Brouer <hawk@...nel.org>, 
 John Fastabend <john.fastabend@...il.com>, 
 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>, 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>
Cc: Alexis Lothore <alexis.lothore@...tlin.com>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org, 
 bpf@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Bastien Curutchet <bastien.curutchet@...tlin.com>
Subject: [PATCH bpf-next v2 0/2] selftests: bpf: Migrate test_xdp_meta.sh
 to test_progs

Hi all,

This patch series continues the work to migrate the script tests into
prog_tests.

test_xdp_meta.sh uses the BPF programs defined in progs/test_xdp_meta.c
to do a simple XDP/TC functional test that checks the metadata
allocation performed by the bpf_xdp_adjust_meta() helper.

This is already partly covered by two tests under prog_tests/:
- xdp_context_test_run.c uses bpf_prog_test_run_opts() to verify the
validity of the xdp_md context after a call to bpf_xdp_adjust_meta()
- xdp_metadata.c ensures that these meta-data can be exchanged through
an AF_XDP socket.

However test_xdp_meta.sh also verifies that the meta-data initialized
in the struct xdp_md is forwarded to the struct __sk_buff used by BPF
programs at 'TC level'. To cover this, I add a test case in
xdp_context_test_run.c that uses the same BPF programs from
progs/test_xdp_meta.c.

---
Changes in v2:
- Add missing close_netns()
- Use a unique 'close' label
- Link to v1: https://lore.kernel.org/r/20241206-xdp_meta-v1-0-5c150618f6e9@bootlin.com

---
Bastien Curutchet (2):
      selftests/bpf: test_xdp_meta: Rename BPF sections
      selftests/bpf: Migrate test_xdp_meta.sh into xdp_context_test_run.c

 tools/testing/selftests/bpf/Makefile               |  1 -
 .../bpf/prog_tests/xdp_context_test_run.c          | 87 ++++++++++++++++++++++
 tools/testing/selftests/bpf/progs/test_xdp_meta.c  |  4 +-
 tools/testing/selftests/bpf/test_xdp_meta.sh       | 58 ---------------
 4 files changed, 89 insertions(+), 61 deletions(-)
---
base-commit: 0c30734c4f35c4784d3d3ca1bb89d9779045878c
change-id: 20241203-xdp_meta-868307cd0e03

Best regards,
-- 
Bastien Curutchet (eBPF Foundation) <bastien.curutchet@...tlin.com>