Re: [PATCH v2] selftests: ublk: fix behavior when fio is not installed

[Ming Lei <ming.lei@redhat.com>]

On Tue, Sep 16, 2025 at 06:42:52PM -0600, Uday Shankar wrote:
> Some ublk selftests have strange behavior when fio is not installed.
> While most tests behave correctly (run if they don't need fio, or skip
> if they need fio), the following tests have different behavior:
> 
> - test_null_01, test_null_02, test_generic_01, test_generic_02, and
>   test_generic_12 try to run fio without checking if it exists first,
>   and fail on any failure of the fio command (including "fio command
>   not found"). So these tests fail when they should skip.
> - test_stress_05 runs fio without checking if it exists first, but
>   doesn't fail on fio command failure. This test passes, but that pass
>   is misleading as the test doesn't do anything useful without fio
>   installed. So this test passes when it should skip.
> 
> Fix these issues by adding _have_program fio checks to the top of all of
> these tests.
> 
> Signed-off-by: Uday Shankar <ushankar@purestorage.com>
> ---
> Changes in v2:
> - Also fix test_generic_01, test_generic_02, test_generic_12, which fail 
>   on systems where bpftrace is installed but fio is not (Mohit Gupta)
> - Link to v1: https://lore.kernel.org/r/20250916-ublk_fio-v1-1-8d522539eed7@purestorage.com

Reviewed-by: Ming Lei <ming.lei@redhat.com>

Thanks,
Ming