osd.py 文件源码

def is_partition(self, dev):
        """
        Check whether a given device path is a partition or a full disk.
        """
        if not os.path.exists(dev):
            raise Error('device not found', dev)

        dev = os.path.realpath(dev)
        if not stat.S_ISBLK(os.lstat(dev).st_mode):
            raise Error('not a block device', dev)

        name = self._get_dev_name(dev)
        if os.path.exists(os.path.join('/sys/block', name)):
            return False

        # make sure it is a partition of something else
        for basename in os.listdir('/sys/block'):
            if os.path.exists(os.path.join('/sys/block', basename, name)):
                return True
        raise Error('not a disk or partition', dev)