/usr/lib/python3/dist-packages/os_win/utils/storage/initiator/base_iscsi_utils.py is in python3-os-win 1.2.0-2.
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# Copyright 2012 Pedro Navarro Perez
# Copyright 2013 Cloudbase Solutions Srl
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""
Helper methods for operations related to the management of volumes,
and storage repositories
"""
import abc
import re
import sys
from oslo_log import log as logging
from os_win._i18n import _LI
from os_win.utils import baseutils
if sys.platform == 'win32':
from six.moves import winreg
LOG = logging.getLogger(__name__)
class BaseISCSIInitiatorUtils(baseutils.BaseUtils):
_FILE_DEVICE_DISK = 7
def __init__(self, host='.'):
self._conn_wmi = self._get_wmi_conn('//%s/root/wmi' % host)
self._conn_cimv2 = self._get_wmi_conn('//%s/root/cimv2' % host)
self._drive_number_regex = re.compile(r'DeviceID=\"[^,]*\\(\d+)\"')
@abc.abstractmethod
def login_storage_target(self, target_lun, target_iqn, target_portal):
pass
@abc.abstractmethod
def logout_storage_target(self, target_iqn):
pass
@abc.abstractmethod
def execute_log_out(self, session_id):
pass
def get_iscsi_initiator(self):
"""Get iscsi initiator name for this machine."""
computer_system = self._conn_cimv2.Win32_ComputerSystem()[0]
hostname = computer_system.name
keypath = ("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\"
"iSCSI\\Discovery")
try:
key = winreg.OpenKey(
winreg.HKEY_LOCAL_MACHINE,
keypath,
0,
winreg.KEY_WOW64_64KEY + winreg.KEY_ALL_ACCESS)
temp = winreg.QueryValueEx(key, 'DefaultInitiatorName')
initiator_name = str(temp[0])
winreg.CloseKey(key)
except Exception:
LOG.info(_LI("The ISCSI initiator name can't be found. "
"Choosing the default one"))
initiator_name = "iqn.1991-05.com.microsoft:" + hostname.lower()
if computer_system.PartofDomain:
initiator_name += '.' + computer_system.Domain.lower()
return initiator_name
def _get_drive_number_from_disk_path(self, disk_path):
drive_number = self._drive_number_regex.findall(disk_path)
if drive_number:
return int(drive_number[0])
def get_session_id_from_mounted_disk(self, physical_drive_path):
drive_number = self._get_drive_number_from_disk_path(
physical_drive_path)
if not drive_number:
return None
initiator_sessions = self._conn_wmi.MSiSCSIInitiator_SessionClass()
for initiator_session in initiator_sessions:
devices = initiator_session.Devices
for device in devices:
device_number = device.DeviceNumber
if device_number == drive_number:
return initiator_session.SessionId
def _get_devices_for_target(self, target_iqn):
initiator_sessions = self._conn_wmi.MSiSCSIInitiator_SessionClass(
TargetName=target_iqn)
if not initiator_sessions:
return []
return initiator_sessions[0].Devices
def get_device_number_for_target(self, target_iqn, target_lun):
devices = self._get_devices_for_target(target_iqn)
for device in devices:
if device.ScsiLun == target_lun:
return device.DeviceNumber
def get_target_lun_count(self, target_iqn):
devices = self._get_devices_for_target(target_iqn)
disk_devices = [device for device in devices
if device.DeviceType == self._FILE_DEVICE_DISK]
return len(disk_devices)
def get_target_from_disk_path(self, disk_path):
initiator_sessions = self._conn_wmi.MSiSCSIInitiator_SessionClass()
drive_number = self._get_drive_number_from_disk_path(disk_path)
if not drive_number:
return None
for initiator_session in initiator_sessions:
devices = initiator_session.Devices
for device in devices:
if device.DeviceNumber == drive_number:
return (device.TargetName, device.ScsiLun)
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