Re: [PATCH v2 7/8] selftests: ublk: add support for user copy to kublk

On Thu, Dec 11, 2025 at 10:16:57PM -0700, Caleb Sander Mateos wrote:

The ublk selftests mock ublk server kublk supports every data copy mode except user copy. Add support for user copy to kublk, enabled via the --user_copy (-u) command line argument. On writes, issue pread() calls to copy the write data into the ublk_io's buffer before dispatching the write to the target implementation. On reads, issue pwrite() calls to copy read data from the ublk_io's buffer before committing the request. Copy in 2 KB chunks to provide some coverage of the offseting logic.

Signed-off-by: Caleb Sander Mateos csander@purestorage.com

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

Thanks, Ming