d5c3f3a7f6
When using Scale-Out File Server SMB shares, we have to use the local share paths instead of the UNC paths if the host is part of the cluster. There's an os-win method that allows fetching the shared path but it expects the share name, while we're passing subdirs as well, for which reason it fails. We'll have to make sure we're passing the share name only, appending the subdir afterwards. Closes-Bug: #1805341 Change-Id: I47d7e7afefe050cd4b25435cfcfc3e8963bd04bc
146 lines
5.4 KiB
Python
146 lines
5.4 KiB
Python
# Copyright 2016 Cloudbase Solutions Srl
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# All Rights Reserved
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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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"""Windows remote filesystem client utilities."""
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import os
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import re
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from oslo_log import log as logging
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from os_win import utilsfactory
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from os_brick import exception
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from os_brick.i18n import _
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from os_brick.remotefs import remotefs
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LOG = logging.getLogger(__name__)
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class WindowsRemoteFsClient(remotefs.RemoteFsClient):
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_username_regex = re.compile(r'user(?:name)?=([^, ]+)')
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_password_regex = re.compile(r'pass(?:word)?=([^, ]+)')
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_loopback_share_map = {}
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def __init__(self, mount_type, root_helper=None,
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execute=None, *args, **kwargs):
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mount_type_to_option_prefix = {
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'cifs': 'smbfs',
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'smbfs': 'smbfs',
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}
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self._local_path_for_loopback = kwargs.get('local_path_for_loopback',
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True)
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if mount_type not in mount_type_to_option_prefix:
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raise exception.ProtocolNotSupported(protocol=mount_type)
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self._mount_type = mount_type
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option_prefix = mount_type_to_option_prefix[mount_type]
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self._mount_base = kwargs.get(option_prefix + '_mount_point_base')
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self._mount_options = kwargs.get(option_prefix + '_mount_options')
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self._smbutils = utilsfactory.get_smbutils()
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self._pathutils = utilsfactory.get_pathutils()
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def get_local_share_path(self, share, expect_existing=True):
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share = self._get_share_norm_path(share)
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share_name = self.get_share_name(share)
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share_subdir = self.get_share_subdir(share)
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is_local_share = self._smbutils.is_local_share(share)
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if not is_local_share:
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LOG.debug("Share '%s' is not exposed by the current host.", share)
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local_share_path = None
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else:
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local_share_path = self._smbutils.get_smb_share_path(share_name)
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if not local_share_path and expect_existing:
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err_msg = _("Could not find the local "
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"share path for %(share)s.")
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raise exception.VolumePathsNotFound(err_msg % dict(share=share))
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if local_share_path and share_subdir:
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local_share_path = os.path.join(local_share_path, share_subdir)
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return local_share_path
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def _get_share_norm_path(self, share):
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return share.replace('/', '\\')
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def get_share_name(self, share):
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return self._get_share_norm_path(share).lstrip('\\').split('\\')[1]
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def get_share_subdir(self, share):
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return "\\".join(
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self._get_share_norm_path(share).lstrip('\\').split('\\')[2:])
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def mount(self, share, flags=None):
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share_norm_path = self._get_share_norm_path(share)
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use_local_path = (self._local_path_for_loopback and
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self._smbutils.is_local_share(share_norm_path))
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if use_local_path:
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LOG.info("Skipping mounting local share %(share_path)s.",
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dict(share_path=share_norm_path))
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else:
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mount_options = " ".join(
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[self._mount_options or '', flags or ''])
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username, password = self._parse_credentials(mount_options)
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if not self._smbutils.check_smb_mapping(
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share_norm_path):
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self._smbutils.mount_smb_share(share_norm_path,
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username=username,
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password=password)
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if self._mount_base:
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self._create_mount_point(share, use_local_path)
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def unmount(self, share):
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self._smbutils.unmount_smb_share(self._get_share_norm_path(share))
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def _create_mount_point(self, share, use_local_path):
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# The mount point will contain a hash of the share so we're
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# intentionally preserving the original share path as this is
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# what the caller will expect.
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mnt_point = self.get_mount_point(share)
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share_norm_path = self._get_share_norm_path(share)
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symlink_dest = (share_norm_path if not use_local_path
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else self.get_local_share_path(share))
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if not os.path.isdir(self._mount_base):
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os.makedirs(self._mount_base)
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if os.path.exists(mnt_point):
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if not self._pathutils.is_symlink(mnt_point):
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raise exception.BrickException(_("Link path already exists "
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"and it's not a symlink"))
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else:
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self._pathutils.create_sym_link(mnt_point, symlink_dest)
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def _parse_credentials(self, opts_str):
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if not opts_str:
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return None, None
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match = self._username_regex.findall(opts_str)
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username = match[0] if match and match[0] != 'guest' else None
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match = self._password_regex.findall(opts_str)
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password = match[0] if match else None
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return username, password
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