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# Copyright 2011 OpenStack Foundation
# 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.
from oslo_utils import strutils
import webob
from cinder.api import extensions
from cinder.api.openstack import wsgi
from cinder.api import xmlutil
from cinder import db
from cinder.db.sqlalchemy import api as sqlalchemy_api
from cinder import exception
from cinder.i18n import _
from cinder import quota
QUOTAS = quota.QUOTAS
NON_QUOTA_KEYS = ['tenant_id', 'id']
authorize_update = extensions.extension_authorizer('volume', 'quotas:update')
authorize_show = extensions.extension_authorizer('volume', 'quotas:show')
authorize_delete = extensions.extension_authorizer('volume', 'quotas:delete')
class QuotaTemplate(xmlutil.TemplateBuilder):
def construct(self):
root = xmlutil.TemplateElement('quota_set', selector='quota_set')
root.set('id')
for resource in QUOTAS.resources:
elem = xmlutil.SubTemplateElement(root, resource)
elem.text = resource
return xmlutil.MasterTemplate(root, 1)
class QuotaSetsController(wsgi.Controller):
def _format_quota_set(self, project_id, quota_set):
"""Convert the quota object to a result dict."""
quota_set['id'] = str(project_id)
return dict(quota_set=quota_set)
def _validate_quota_limit(self, limit):
try:
limit = int(limit)
except ValueError:
msg = _("Quota limit must be specified as an integer value.")
raise webob.exc.HTTPBadRequest(explanation=msg)
# NOTE: -1 is a flag value for unlimited
if limit < -1:
msg = _("Quota limit must be -1 or greater.")
raise webob.exc.HTTPBadRequest(explanation=msg)
return limit
def _get_quotas(self, context, id, usages=False):
values = QUOTAS.get_project_quotas(context, id, usages=usages)
if usages:
return values
else:
return dict((k, v['limit']) for k, v in values.items())
@wsgi.serializers(xml=QuotaTemplate)
def show(self, req, id):
context = req.environ['cinder.context']
authorize_show(context)
params = req.params
if not hasattr(params, '__call__') and 'usage' in params:
usage = strutils.bool_from_string(params['usage'])
else:
usage = False
try:
sqlalchemy_api.authorize_project_context(context, id)
except exception.NotAuthorized:
raise webob.exc.HTTPForbidden()
return self._format_quota_set(id, self._get_quotas(context, id, usage))
@wsgi.serializers(xml=QuotaTemplate)
def update(self, req, id, body):
context = req.environ['cinder.context']
authorize_update(context)
project_id = id
if not self.is_valid_body(body, 'quota_set'):
msg = (_("Missing required element quota_set in request body."))
raise webob.exc.HTTPBadRequest(explanation=msg)
bad_keys = []
# NOTE(ankit): Pass #1 - In this loop for body['quota_set'].items(),
# we figure out if we have any bad keys.
for key, value in body['quota_set'].items():
if (key not in QUOTAS and key not in NON_QUOTA_KEYS):
bad_keys.append(key)
continue
if len(bad_keys) > 0:
msg = _("Bad key(s) in quota set: %s") % ",".join(bad_keys)
raise webob.exc.HTTPBadRequest(explanation=msg)
# NOTE(ankit): Pass #2 - In this loop for body['quota_set'].keys(),
# we validate the quota limits to ensure that we can bail out if
# any of the items in the set is bad.
valid_quotas = {}
for key in body['quota_set'].keys():
if key in NON_QUOTA_KEYS:
continue
value = self._validate_quota_limit(body['quota_set'][key])
valid_quotas[key] = value
# NOTE(ankit): Pass #3 - At this point we know that all the keys and
# values are valid and we can iterate and update them all in one shot
# without having to worry about rolling back etc as we have done
# the validation up front in the 2 loops above.
for key, value in valid_quotas.items():
try:
db.quota_update(context, project_id, key, value)
except exception.ProjectQuotaNotFound:
db.quota_create(context, project_id, key, value)
except exception.AdminRequired:
raise webob.exc.HTTPForbidden()
return {'quota_set': self._get_quotas(context, id)}
@wsgi.serializers(xml=QuotaTemplate)
def defaults(self, req, id):
context = req.environ['cinder.context']
authorize_show(context)
return self._format_quota_set(id, QUOTAS.get_defaults(context))
@wsgi.serializers(xml=QuotaTemplate)
def delete(self, req, id):
context = req.environ['cinder.context']
authorize_delete(context)
try:
db.quota_destroy_all_by_project(context, id)
except exception.AdminRequired:
raise webob.exc.HTTPForbidden()
class Quotas(extensions.ExtensionDescriptor):
"""Quota management support."""
name = "Quotas"
alias = "os-quota-sets"
namespace = "http://docs.openstack.org/volume/ext/quotas-sets/api/v1.1"
updated = "2011-08-08T00:00:00+00:00"
def get_resources(self):
resources = []
res = extensions.ResourceExtension('os-quota-sets',
QuotaSetsController(),
member_actions={'defaults': 'GET'})
resources.append(res)
return resources
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