zbd: improve replay range validation

zbd: improve replay range validation

The function zbd_replay_write_order() is called when a read is
issued by fio verification code to compare the read data with the
previously written data. Any data mismatch is marked as a verification
failure.

Since zbd_adjust_block() may change the i/o offset and length
to comply with i/o constrains that zoned model has set,
zbd_replay_write_order() needs to replicate the same adjustment during
verify. The general flow in this function matches the write processing
done in zbd_adjust_block(), but there are some differences. For
example, z->verify_block acts as the pseudo-write pointer during replay
and it needs to be advanced by buflen every time the function called,
but it is advanced by min_bs in the existing code (the value of this
variable is measured in min_bs units).

Fix the issue with verify_block and add more error logging to simplify
troubleshooting of this tricky part of ZBD code.

Signed-off-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
Reviewed-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>