def get_system_serial_from_iqn(iqn_str):
from infi.dtypes.iqn import IQN, InvalidIQN
try:
last_iqn_field = IQN(iqn_str).get_extra_fields()[-1]
except InvalidIQN:
raise InvalidInfiniboxConnectivity("Invalid IQN {}".format(iqn_str))
if last_iqn_field.startswith("infinibox-sn-"):
try:
return int(last_iqn_field.split("-")[-2])
except ValueError:
raise InvalidInfiniboxConnectivity("Invalid InfiniBox IQN {}".format(iqn_str))
raise InvalidInfiniboxConnectivity("Could not get InfiniBox serial from IQN {}".format(iqn_str))
