Hi all,

This patch series continues the work to migrate the *.sh tests into
prog_tests framework.

The test_tunnel.sh script has already been partly migrated to
test_progs in prog_tests/test_tunnel.c so I add my work to it.

PATCH 1 & 2 create some helpers to avoid code duplication and ease the
migration in the following patches.
PATCH 3 to 9 migrate the tests of gre, ip6gre, erspan, ip6erspan,
geneve, ip6geneve and ip6tnl tunnels.
PATCH 10 removes test_tunnel.sh

Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@bootlin.com>
---
Changes in v2:
- PATCH 1: Move tc_hook definition to attatch_tc_prog()
- PATCH 4: Disable DAD through `ip addr`
- Link to v1: https://lore.kernel.org/r/20250227-tunnels-v1-0-33df5c30aa04@bootlin.com

---
Bastien Curutchet (eBPF Foundation) (10):
      selftests/bpf: test_tunnel: Add generic_attach* helpers
      selftests/bpf: test_tunnel: Add ping helpers
      selftests/bpf: test_tunnel: Move gre tunnel test to test_progs
      selftests/bpf: test_tunnel: Move ip6gre tunnel test to test_progs
      selftests/bpf: test_tunnel: Move erspan tunnel tests to test_progs
      selftests/bpf: test_tunnel: Move ip6erspan tunnel test to test_progs
      selftests/bpf: test_tunnel: Move geneve tunnel test to test_progs
      selftests/bpf: test_tunnel: Move ip6geneve tunnel test to test_progs
      selftests/bpf: test_tunnel: Move ip6tnl tunnel tests to test_progs
      selftests/bpf: test_tunnel: Remove test_tunnel.sh

 tools/testing/selftests/bpf/Makefile               |   1 -
 .../testing/selftests/bpf/prog_tests/test_tunnel.c | 633 ++++++++++++++++----
 tools/testing/selftests/bpf/test_tunnel.sh         | 645 ---------------------
 3 files changed, 530 insertions(+), 749 deletions(-)
---
base-commit: 97b4501198b918f1d0adeb8205004d64f780e472
change-id: 20250131-tunnels-59b641ea3f10

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