selftests/bpf: modify_return: isolate fmod_ret hooks by pid#11390
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modify_return's fmod_ret programs can override bpf_modify_return_test()'s return value, which conflicts with get_func_ip_test when selftests run in parallel. Store current tgid in BSS and make modify_return hooks act only for that tgid. For other tasks, fentry/fexit become no-ops and fmod_ret returns the original ret. Drop the serial-only restriction and remove the TODO comment. Tested: sudo ./test_progs -t modify_return sudo ./test_progs -t get_func_ip_test sudo ./test_progs -j$(nproc) -t modify_return sudo ./test_progs -j$(nproc) -t get_func_ip_test Signed-off-by: Sun Jian <sun.jian.kdev@gmail.com>
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=1066051 irrelevant now. Closing PR. |
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Pull request for series with
subject: selftests/bpf: modify_return: isolate fmod_ret hooks by pid
version: 2
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1066051