selftests/bpf: Verify bpf-tcp-cc rejects TCP_NODELAY

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Add a bpf_tcp_ca selftest for the TCP_NODELAY restriction in
bpf-tcp-cc.

Update bpf_cubic to exercise init() and cwnd_event_tx_start(),
and check that both callbacks reject bpf_setsockopt(TCP_NODELAY)
with -EOPNOTSUPP.

Signed-off-by: KaFai Wan <kafai.wan@linux.dev>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20260421155804.135786-5-kafai.wan@linux.dev

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KaFai Wan 2026-04-21 23:58:04 +08:00 • committed by Martin KaFai Lau

parent 52b6b53349

commit 2c7e33f1fc

2 changed files with 18 additions and 0 deletions

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4

tools/testing/selftests/bpf/prog_tests/bpf_tcp_ca.c

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14

tools/testing/selftests/bpf/progs/bpf_cubic.c

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