UBLKS_IO_NEED_FETCH_RQ
q->ios[i].flags = UBLKS_IO_NEED_FETCH_RQ | UBLKS_IO_FREE;
(UBLKS_IO_NEED_FETCH_RQ | UBLKS_IO_NEED_COMMIT_RQ_COMP | UBLKS_IO_NEED_GET_DATA)))
} else if (io->flags & UBLKS_IO_NEED_FETCH_RQ)
io->flags &= ~UBLKS_IO_NEED_FETCH_RQ;