[PATCH bpf-next 0/5] selftests/bpf: convert test_tc_tunnel.sh to test_progs

["Alexis Lothoré (eBPF Foundation)" <alexis.lothore@bootlin.com>]

Hello,
this series aims to convert another test to the test_progs framework to
make sure that it is executed in CI for series sent on the mailing list.
test_tc_tunnel.sh tests a variety of tunnels based on BPF: packets are
encapsulated by a BPF program on the client egress. We then check that
those packets can be decapsulated on server ingress side, either thanks
to kernel-based or BPF-based decapsulation. Those tests are run thanks
to two veths in two dedicated namespaces.

- patches 1 to 3 are preparatory patches
- patch 4 introduce tc_tunnel test into test_progs
- patch 5 gets rid of the test_tc_tunnel.sh script

The new test has been executed both in some x86 local qemu machine, as
well as in CI:

  # ./test_progs -a tc_tunnel
  #454/1   tc_tunnel/ipip_none:OK
  #454/2   tc_tunnel/ipip6_none:OK
  #454/3   tc_tunnel/ip6tnl_none:OK
  #454/4   tc_tunnel/sit_none:OK
  #454/5   tc_tunnel/vxlan_eth:OK
  #454/6   tc_tunnel/ip6vxlan_eth:OK
  #454/7   tc_tunnel/gre_none:OK
  #454/8   tc_tunnel/gre_eth:OK
  #454/9   tc_tunnel/gre_mpls:OK
  #454/10  tc_tunnel/ip6gre_none:OK
  #454/11  tc_tunnel/ip6gre_eth:OK
  #454/12  tc_tunnel/ip6gre_mpls:OK
  #454/13  tc_tunnel/udp_none:OK
  #454/14  tc_tunnel/udp_eth:OK
  #454/15  tc_tunnel/udp_mpls:OK
  #454/16  tc_tunnel/ip6udp_none:OK
  #454/17  tc_tunnel/ip6udp_eth:OK
  #454/18  tc_tunnel/ip6udp_mpls:OK
  #454     tc_tunnel:OK
  Summary: 1/18 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin.com>
---
Alexis Lothoré (eBPF Foundation) (5):
      testing/selftests: rename tc_helpers.h to tcx_helpers.h
      selftests/bpf: add tc helpers
      selftests/bpf: make test_tc_tunnel.bpf.c compatible with big endian platforms
      selftests/bpf: integrate test_tc_tunnel.sh tests into test_progs
      selftests/bpf: remove test_tc_tunnel.sh

 tools/testing/selftests/bpf/Makefile               |   2 +-
 tools/testing/selftests/bpf/prog_tests/tc_links.c  |  46 +-
 tools/testing/selftests/bpf/prog_tests/tc_netkit.c |  22 +-
 tools/testing/selftests/bpf/prog_tests/tc_opts.c   |  40 +-
 .../bpf/prog_tests/{tc_helpers.h => tcx_helpers.h} |   6 +-
 .../selftests/bpf/prog_tests/test_tc_tunnel.c      | 684 +++++++++++++++++++++
 .../testing/selftests/bpf/prog_tests/test_tunnel.c |  80 +--
 tools/testing/selftests/bpf/progs/test_tc_tunnel.c |  99 ++-
 tools/testing/selftests/bpf/tc_helpers.c           |  87 +++
 tools/testing/selftests/bpf/tc_helpers.h           |   9 +
 tools/testing/selftests/bpf/test_tc_tunnel.sh      | 320 ----------
 11 files changed, 884 insertions(+), 511 deletions(-)
---
base-commit: 22267893b8c7f2773896e814800bbe693f206e0c
change-id: 20250811-tc_tunnel-c61342683f18

Best regards,
-- 
Alexis Lothoré, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com