+ void (*zbd_queue_io)(struct thread_data *td, struct io_u *, int q,
+ bool success);
+
+ /*
+ * ZBD mode zbd_put_io callback: called in after completion of an I/O
+ * or commit of an async I/O to unlock the I/O target zone.
+ */
+ void (*zbd_put_io)(struct thread_data *td, const struct io_u *);