selftests/bpf: Add test cases for htab update

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One test demonstrates the reentrancy of hash map update on the same
bucket should fail, and another one shows concureently updates of
the same hash map bucket should succeed and not fail due to
the reentrancy checking for bucket lock.

There is no trampoline support on s390x, so move htab_update to
denylist.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/r/20220831042629.130006-4-houtao@huaweicloud.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>

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Hou Tao 2022-08-31 12:26:29 +08:00 • committed by Martin KaFai Lau

parent 66a7a92e4d

commit 1c636b6277

3 changed files with 156 additions and 0 deletions

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1

tools/testing/selftests/bpf/DENYLIST.s390x

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126

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

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29

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

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