Re: [PATCH v2 6/8] selftests: ublk: forbid multiple data copy modes

[Ming Lei]

On Thu, Dec 11, 2025 at 10:16:56PM -0700, Caleb Sander Mateos wrote:
> The kublk mock ublk server allows multiple data copy mode arguments to
> be passed on the command line (--zero_copy, --get_data, and --auto_zc).
> The ublk device will be created with all the requested feature flags,
> however kublk will only use one of the modes to interact with request
> data (arbitrarily preferring auto_zc over zero_copy over get_data). To
> clarify the intent of the test, don't allow multiple data copy modes to
> be specified. --zero_copy and --auto_zc are allowed together for
> --auto_zc_fallback, which uses both copy modes.
> Don't set UBLK_F_USER_COPY for zero_copy, as it's a separate feature.
> Fix the test cases in test_stress_05 passing --get_data along with
> --zero_copy or --auto_zc.
> 
> Signed-off-by: Caleb Sander Mateos <csander@xxxxxxxxxxxxxxx>

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


Thanks,
Ming