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SubjectRe: [PATCH v3 2/2] bpf: add selftest for rawir_event type program
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2018-05-18 14:33 UTC+0100 ~ Sean Young <sean@mess.org>
> On Fri, May 18, 2018 at 11:13:07AM +0100, Quentin Monnet wrote:
>> 2018-05-17 22:01 UTC+0100 ~ Sean Young <sean@mess.org>
>>> On Thu, May 17, 2018 at 10:17:59AM -0700, Y Song wrote:
>>>> On Wed, May 16, 2018 at 2:04 PM, Sean Young <sean@mess.org> wrote:
>>>>> This is simple test over rc-loopback.
>>>>>
>>>>> Signed-off-by: Sean Young <sean@mess.org>
>>>>> ---
>>>>> tools/bpf/bpftool/prog.c | 1 +
>>>>> tools/include/uapi/linux/bpf.h | 57 +++++++-
>>>>> tools/lib/bpf/libbpf.c | 1 +
>>>>> tools/testing/selftests/bpf/Makefile | 8 +-
>>>>> tools/testing/selftests/bpf/bpf_helpers.h | 6 +
>>>>> tools/testing/selftests/bpf/test_rawir.sh | 37 +++++
>>>>> .../selftests/bpf/test_rawir_event_kern.c | 26 ++++
>>>>> .../selftests/bpf/test_rawir_event_user.c | 130 ++++++++++++++++++
>>>>> 8 files changed, 261 insertions(+), 5 deletions(-)
>>>>> create mode 100755 tools/testing/selftests/bpf/test_rawir.sh
>>>>> create mode 100644 tools/testing/selftests/bpf/test_rawir_event_kern.c
>>>>> create mode 100644 tools/testing/selftests/bpf/test_rawir_event_user.c
>>
>> [...]
>>
>>>> Most people probably not really familiar with lircN device. It would be
>>>> good to provide more information about how to enable this, e.g.,
>>>> CONFIG_RC_CORE=y
>>>> CONFIG_BPF_RAWIR_EVENT=y
>>>> CONFIG_RC_LOOPBACK=y
>>>> ......
>>>
>>> Good point. I'll add some words explaining what is and how to make it work.
>>>
>>> Thanks
>>> Sean
>>
>>
>> By the way, shouldn't the two eBPF helpers bpf_rc_keydown() and
>> bpf_rc_repeat() be compiled out in patch 1 if e.g.
>> CONFIG_BPF_RAWIR_EVENT is not set? There are some other helpers that are
>> compiled only if relevant config options are set (bpf_get_xfrm_state()
>> for example).
>
> So if CONFIG_BPF_RAWIR_EVENT is not set, then bpf-rawir-event.c is not
> compiled. Stubs are created in include/linux/bpf_rcdev.h, so this is
> already the case if I understand your correctly.

This is correct, sorry for the mistake.

>> (If you were to change that, please also update helper documentations to
>> indicate what configuration options are required to be able to use the
>> helpers.)
>
> Ok, I'll add that.
Thanks a lot!

Quentin

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