OpenStack Block Storage (Cinder)
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# 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.
from oslo_log import log as logging
from oslo_utils import strutils
import webob
from webob import exc
from cinder.i18n import _
LOG = logging.getLogger(__name__)
def _parse_is_public(is_public):
"""Parse is_public into something usable.
* True: List public volume types only
* False: List private volume types only
* None: List both public and private volume types
"""
if is_public is None:
# preserve default value of showing only public types
return True
elif is_none_string(is_public):
return None
else:
try:
return strutils.bool_from_string(is_public, strict=True)
except ValueError:
msg = _('Invalid is_public filter [%s]') % is_public
raise exc.HTTPBadRequest(explanation=msg)
def is_none_string(val):
"""Check if a string represents a None value."""
if not isinstance(val, str):
return False
return val.lower() == 'none'
def remove_invalid_filter_options(context, filters,
allowed_search_options):
"""Remove search options that are not valid for non-admin API/context."""
if context.is_admin:
# Allow all options
return
# Otherwise, strip out all unknown options
unknown_options = [opt for opt in filters
if opt not in allowed_search_options]
bad_options = ", ".join(unknown_options)
LOG.debug("Removing options '%s' from query.", bad_options)
for opt in unknown_options:
del filters[opt]
_visible_admin_metadata_keys = ['readonly', 'attached_mode']
def add_visible_admin_metadata(volume):
"""Add user-visible admin metadata to regular metadata.
Extracts the admin metadata keys that are to be made visible to
non-administrators, and adds them to the regular metadata structure for the
passed-in volume.
"""
visible_admin_meta = {}
if volume.get('volume_admin_metadata'):
if isinstance(volume['volume_admin_metadata'], dict):
volume_admin_metadata = volume['volume_admin_metadata']
for key in volume_admin_metadata:
if key in _visible_admin_metadata_keys:
visible_admin_meta[key] = volume_admin_metadata[key]
else:
for item in volume['volume_admin_metadata']:
if item['key'] in _visible_admin_metadata_keys:
visible_admin_meta[item['key']] = item['value']
# avoid circular ref when volume is a Volume instance
elif (volume.get('admin_metadata') and
isinstance(volume.get('admin_metadata'), dict)):
for key in _visible_admin_metadata_keys:
if key in volume['admin_metadata'].keys():
visible_admin_meta[key] = volume['admin_metadata'][key]
if not visible_admin_meta:
return
# NOTE(zhiyan): update visible administration metadata to
# volume metadata, administration metadata will rewrite existing key.
if volume.get('volume_metadata'):
orig_meta = list(volume.get('volume_metadata'))
for item in orig_meta:
if item['key'] in visible_admin_meta.keys():
item['value'] = visible_admin_meta.pop(item['key'])
for key, value in visible_admin_meta.items():
orig_meta.append({'key': key, 'value': value})
volume['volume_metadata'] = orig_meta
# avoid circular ref when vol is a Volume instance
elif (volume.get('metadata') and
isinstance(volume.get('metadata'), dict)):
volume['metadata'].update(visible_admin_meta)
else:
volume['metadata'] = visible_admin_meta
def validate_integer(value, name, min_value=None, max_value=None):
"""Make sure that value is a valid integer, potentially within range.
:param value: the value of the integer
:param name: the name of the integer
:param min_length: the min_length of the integer
:param max_length: the max_length of the integer
:returns: integer
"""
try:
value = strutils.validate_integer(value, name, min_value, max_value)
return value
except ValueError as e:
raise webob.exc.HTTPBadRequest(explanation=str(e))
def walk_class_hierarchy(clazz, encountered=None):
"""Walk class hierarchy, yielding most derived classes first."""
if not encountered:
encountered = []
for subclass in clazz.__subclasses__():
if subclass not in encountered:
encountered.append(subclass)
# drill down to leaves first
for subsubclass in walk_class_hierarchy(subclass, encountered):
yield subsubclass
yield subclass