Re: [PATCH bpf-next 2/2] selftests/bpf: add tests for target information in bpf_link info queries

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Toke Høiland-Jørgensen <toke@xxxxxxxxxx> writes:

> Andrii Nakryiko <andrii.nakryiko@xxxxxxxxx> writes:
>
>> On Thu, Apr 8, 2021 at 12:57 PM Toke Høiland-Jørgensen <toke@xxxxxxxxxx> wrote:
>>>
>>> Extend the fexit_bpf2bpf test to check that the info for the bpf_link
>>> returned by the kernel matches the expected values.
>>>
>>> While we're updating the test, change existing uses of CHEC() to use the
>>> much easier to read ASSERT_*() macros.
>>>
>>> Signed-off-by: Toke Høiland-Jørgensen <toke@xxxxxxxxxx>
>>> ---
>>
>> Just a minor nit below. Looks good, thanks.
>>
>> Acked-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
>>
>>>  .../selftests/bpf/prog_tests/fexit_bpf2bpf.c  | 50 +++++++++++++++----
>>>  1 file changed, 39 insertions(+), 11 deletions(-)
>>>
>>> diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c b/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c
>>> index 5c0448910426..019a46d8e98e 100644
>>> --- a/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c
>>> +++ b/tools/testing/selftests/bpf/prog_tests/fexit_bpf2bpf.c
>>> @@ -57,11 +57,13 @@ static void test_fexit_bpf2bpf_common(const char *obj_file,
>>>                                       bool run_prog,
>>>                                       test_cb cb)
>>>  {
>>> +       __u32 duration = 0, retval, tgt_prog_id, info_len;
>>
>> if not CHECK() is used, duration shouldn't be needed anymore
>
> Oh, and duration is still needed for bpf_prog_test_run(), so I'll keep
> that; but removing it did make the compiler point out that I missed one
> CHECK() at the beginning of the function when converting, so will fix
> that instead :)

Argh, no, bpf_prog_test_run() will accept a NULL pointer for duration;
sorry for the noise!

-Toke





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