Hi all,
this series contains some improvements for the selftest patches. The other patches remain unchanged. Please check the changelist below.
I have reverted the addition of the NOARP flag from the previous version, as it was not effective and the CI was still failing occasionally because of the race condition caused by foreign packets interfering with the veth tests. This series contains an alternative solution by filtering all but the test packets using the attached XDP program.
Successful pipeline: https://github.com/kernel-patches/bpf/actions/runs/13552017584
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v4: - strip unrelated changes from the selftest patches - extend commit message for "selftests/bpf: refactor xdp_context_functional test and bpf program" - the NOARP flag was not effective to prevent other packets from interfering with the tests, add a filter to the XDP program instead - run xdp_context_tuntap in a separate namespace to avoid conflicts with other tests
v3: https://lore.kernel.org/bpf/20250224152909.3911544-1-marcus.wichelmann@hetzn... - change the condition to handle xdp_buffs without metadata support, as suggested by Willem de Bruijn willemb@google.com - add clarifying comment why that condition is needed - set NOARP flag in selftests to ensure that the kernel does not send packets on the test interfaces that may interfere with the tests
v2: https://lore.kernel.org/bpf/20250217172308.3291739-1-marcus.wichelmann@hetzn... - submit against bpf-next subtree - split commits and improved commit messages - remove redundant metasize check and add clarifying comment instead - use max() instead of ternary operator - add selftest for metadata support in the tun driver
v1: https://lore.kernel.org/all/20250130171614.1657224-1-marcus.wichelmann@hetzn...
Marcus Wichelmann (6): net: tun: enable XDP metadata support net: tun: enable transfer of XDP metadata to skb selftests/bpf: move open_tuntap to network helpers selftests/bpf: refactor xdp_context_functional test and bpf program selftests/bpf: add test for XDP metadata support in tun driver selftests/bpf: fix file descriptor assertion in open_tuntap helper
drivers/net/tun.c | 28 +++- tools/testing/selftests/bpf/network_helpers.c | 28 ++++ tools/testing/selftests/bpf/network_helpers.h | 3 + .../selftests/bpf/prog_tests/lwt_helpers.h | 29 ---- .../bpf/prog_tests/xdp_context_test_run.c | 138 +++++++++++++++++- .../selftests/bpf/progs/test_xdp_meta.c | 53 +++++-- 6 files changed, 223 insertions(+), 56 deletions(-)