code: def _rescanSizes(self, force=True):
          
          status = self.QUOTA_CTL(cmd=BTRFS_QUOTA_CTL_ENABLE).status
          logger.debug("CTL Status: %s", hex(status))
  
          status = self.QUOTA_RESCAN_STATUS()
          logger.debug("RESCAN Status: %s", status)
  
          if not status.flags:
              if not force:
                  return
              self.QUOTA_RESCAN()
  
          logger.warn("Waiting for btrfs quota usage scan...")
          self.QUOTA_RESCAN_WAIT()
docs: Zero and recalculate quota sizes to subvolume sizes will be correct.