$ python -c "import logging; logging.basicConfig(level=logging.DEBUG); from ovirt_imageio_common import nbd; c = nbd.Client('/tmp/nbd.sock', 'export')"
INFO:nbd:Connecting to '/tmp/nbd.sock' 'export'
DEBUG:nbd:Received server flags: 3
DEBUG:nbd:Sending client flags: 1:
DEBUG:nbd:Sending option: 'IHAVEOPT\x00\x00\x00\x07\x00\x00\x00\x0c' data: bytearray(b'\x00\x00\x00\x06export\x00\x00')
DEBUG:nbd:Received reply [magic=3e889045565a9 option=7 type=80000001 len=0]
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "ovirt_imageio_common/nbd.py", line 126, in __init__
self._newstyle_handshake(export_name)
File "ovirt_imageio_common/nbd.py", line 181, in _newstyle_handshake
self._receive_go_reply()
File "ovirt_imageio_common/nbd.py", line 206, in _receive_go_reply
.format(ERROR_REPLY[reply], message))
ovirt_imageio_common.nbd.Error: The option sent by the client is unknown by this server implementation [message=])