def scan_vf_devices(cls, dev_name):
"""Scan os directories to get VF devices
@param dev_name: pf network device name
@return: list of virtual functions
"""
vf_list = []
dev_path = cls.DEVICE_PATH % dev_name
if not os.path.isdir(dev_path):
LOG.error(_LE("Failed to get devices for %s"), dev_name)
raise exc.InvalidDeviceError(dev_name=dev_name,
reason=_("Device not found"))
file_list = os.listdir(dev_path)
for file_name in file_list:
pattern_match = cls.VIRTFN_REG_EX.match(file_name)
if pattern_match:
vf_index = int(pattern_match.group("vf_index"))
file_path = os.path.join(dev_path, file_name)
if os.path.islink(file_path):
file_link = os.readlink(file_path)
pci_slot = os.path.basename(file_link)
vf_list.append((pci_slot, vf_index))
if not vf_list:
raise exc.InvalidDeviceError(
dev_name=dev_name, reason=_("Device has no virtual functions"))
return vf_list
def test_create_eswitch_mgr_fail(self):
device_mappings = {'physnet1': 'p6p1'}
with mock.patch("neutron.plugins.sriovnicagent.eswitch_manager."
"PciOsWrapper.scan_vf_devices",
side_effect=exc.InvalidDeviceError(
dev_name="p6p1", reason="device" " not found")),\
mock.patch("neutron.plugins.sriovnicagent.eswitch_manager."
"PciOsWrapper.is_assigned_vf", return_value=True):
with testtools.ExpectedException(exc.InvalidDeviceError):
esm.ESwitchManager(device_mappings, None)