2026ee8e0f
In order to provide support for VFAT ConfigDrive, this patch uses a couple of tools from the mtools package, mdir for listing VFAT filesystems, respectively mcopy, for copying files from such filesystems. The first step when retrieving the metadata from a ConfigDrive is now the lookup for VFAT filesystems. If any such filesystem is found, the metadata will be taken from there. Change-Id: I2fa9c96ce22936ca3d8d8fb9f55ca1ab29ce1d1d
69 lines
2.1 KiB
Python
69 lines
2.1 KiB
Python
# Copyright 2015 Cloudbase Solutions Srl
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os
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from cloudbaseinit import exception
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from cloudbaseinit.openstack.common import log as logging
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from oslo.config import cfg
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opts = [
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cfg.StrOpt('mtools_path', default=None,
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help='Path to "mtools" program suite, used for interacting '
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'with VFAT filesystems'),
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]
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CONF = cfg.CONF
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CONF.register_opts(opts)
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LOG = logging.getLogger(__name__)
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def _check_mtools_path():
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if not CONF.mtools_path:
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raise exception.CloudbaseInitException(
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'"mtools_path" needs to be provided in order '
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'to access VFAT drives')
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def is_vfat_drive(osutils, drive_path):
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"""Check if the given drive contains a VFAT filesystem."""
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_check_mtools_path()
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mdir = os.path.join(CONF.mtools_path, "mdir.exe")
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args = [mdir, "-/", "-b", "-i", drive_path, "/"]
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_, _, exit_code = osutils.execute_process(args, shell=False)
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if exit_code:
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LOG.warning("%r is not a VFAT location.", drive_path)
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return
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return True
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def copy_from_vfat_drive(osutils, drive_path, target_path):
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"""Copy everything from the given VFAT drive into the given target."""
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_check_mtools_path()
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cwd = os.getcwd()
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try:
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os.chdir(target_path)
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# A mcopy call looks like this:
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#
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# mcopy -n -i \\.\PHYSICALDRIVEx ::/file/path destination/path
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mcopy = os.path.join(CONF.mtools_path, "mcopy.exe")
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args = [mcopy, "-s", "-n", "-i", drive_path, "::/", "."]
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osutils.execute_process(args, shell=False)
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finally:
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os.chdir(cwd)
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