df70ae91ca
This patch logs whatever mlabel returns. This can help us to debug situations where the output is actually different that what it is expected, which can lead to a is_vfat_drive to fail on a real VFAT Config Drive. Change-Id: I9fe6c19995b30335aeea2471164434b10626b004
78 lines
2.5 KiB
Python
78 lines
2.5 KiB
Python
# Copyright 2015 Cloudbase Solutions Srl
|
|
#
|
|
# 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.
|
|
|
|
import os
|
|
import re
|
|
|
|
from cloudbaseinit import exception
|
|
from cloudbaseinit.openstack.common import log as logging
|
|
|
|
from oslo.config import cfg
|
|
|
|
|
|
opts = [
|
|
cfg.StrOpt('mtools_path', default=None,
|
|
help='Path to "mtools" program suite, used for interacting '
|
|
'with VFAT filesystems'),
|
|
]
|
|
|
|
CONF = cfg.CONF
|
|
CONF.register_opts(opts)
|
|
CONFIG_DRIVE_LABEL = 'config-2'
|
|
LOG = logging.getLogger(__name__)
|
|
VOLUME_LABEL_REGEX = re.compile("Volume label is (.*?)$")
|
|
|
|
|
|
def _check_mtools_path():
|
|
if not CONF.mtools_path:
|
|
raise exception.CloudbaseInitException(
|
|
'"mtools_path" needs to be provided in order '
|
|
'to access VFAT drives')
|
|
|
|
|
|
def is_vfat_drive(osutils, drive_path):
|
|
"""Check if the given drive contains a VFAT filesystem."""
|
|
_check_mtools_path()
|
|
mlabel = os.path.join(CONF.mtools_path, "mlabel.exe")
|
|
args = [mlabel, "-i", drive_path, "-s"]
|
|
|
|
out, err, exit_code = osutils.execute_process(args, shell=False)
|
|
if exit_code:
|
|
LOG.warning("Could not retrieve label for VFAT drive path %r",
|
|
drive_path)
|
|
LOG.warning("mlabel failed with error %r", err)
|
|
return False
|
|
|
|
LOG.info("Obtained label information for drive %r: %r", drive_path, out)
|
|
out = out.decode().strip()
|
|
match = VOLUME_LABEL_REGEX.search(out)
|
|
return match.group(1) == CONFIG_DRIVE_LABEL
|
|
|
|
|
|
def copy_from_vfat_drive(osutils, drive_path, target_path):
|
|
"""Copy everything from the given VFAT drive into the given target."""
|
|
_check_mtools_path()
|
|
cwd = os.getcwd()
|
|
try:
|
|
os.chdir(target_path)
|
|
|
|
# A mcopy call looks like this:
|
|
#
|
|
# mcopy -n -i \\.\PHYSICALDRIVEx ::/file/path destination/path
|
|
mcopy = os.path.join(CONF.mtools_path, "mcopy.exe")
|
|
args = [mcopy, "-s", "-n", "-i", drive_path, "::/", "."]
|
|
osutils.execute_process(args, shell=False)
|
|
finally:
|
|
os.chdir(cwd)
|