160 lines
6.4 KiB
Python
160 lines
6.4 KiB
Python
# Copyright (c) 2015 OpenStack Foundation. 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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import collections
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from neutron.db import common_db_mixin as common_db_api
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from neutron.db.quota import models as quota_models
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class QuotaUsageInfo(collections.namedtuple(
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'QuotaUsageInfo', ['resource', 'tenant_id', 'used', 'reserved', 'dirty'])):
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@property
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def total(self):
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"""Total resource usage (reserved and used)."""
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return self.reserved + self.used
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def get_quota_usage_by_resource_and_tenant(context, resource, tenant_id,
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lock_for_update=False):
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"""Return usage info for a given resource and tenant.
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:param context: Request context
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:param resource: Name of the resource
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:param tenant_id: Tenant identifier
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:param lock_for_update: if True sets a write-intent lock on the query
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:returns: a QuotaUsageInfo instance
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"""
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query = common_db_api.model_query(context, quota_models.QuotaUsage)
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query = query.filter_by(resource=resource, tenant_id=tenant_id)
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if lock_for_update:
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query = query.with_lockmode('update')
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result = query.first()
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if not result:
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return
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return QuotaUsageInfo(result.resource,
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result.tenant_id,
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result.in_use,
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result.reserved,
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result.dirty)
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def get_quota_usage_by_resource(context, resource):
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query = common_db_api.model_query(context, quota_models.QuotaUsage)
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query = query.filter_by(resource=resource)
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return [QuotaUsageInfo(item.resource,
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item.tenant_id,
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item.in_use,
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item.reserved,
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item.dirty) for item in query]
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def get_quota_usage_by_tenant_id(context, tenant_id):
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query = common_db_api.model_query(context, quota_models.QuotaUsage)
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query = query.filter_by(tenant_id=tenant_id)
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return [QuotaUsageInfo(item.resource,
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item.tenant_id,
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item.in_use,
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item.reserved,
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item.dirty) for item in query]
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def set_quota_usage(context, resource, tenant_id,
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in_use=None, reserved=None, delta=False):
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"""Set resource quota usage.
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:param context: instance of neutron context with db session
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:param resource: name of the resource for which usage is being set
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:param tenant_id: identifier of the tenant for which quota usage is
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being set
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:param in_use: integer specifying the new quantity of used resources,
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or a delta to apply to current used resource
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:param reserved: integer specifying the new quantity of reserved resources,
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or a delta to apply to current reserved resources
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:param delta: Specififies whether in_use or reserved are absolute numbers
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or deltas (default to False)
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"""
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query = common_db_api.model_query(context, quota_models.QuotaUsage)
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query = query.filter_by(resource=resource).filter_by(tenant_id=tenant_id)
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usage_data = query.first()
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with context.session.begin(subtransactions=True):
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if not usage_data:
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# Must create entry
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usage_data = quota_models.QuotaUsage(
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resource=resource,
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tenant_id=tenant_id)
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context.session.add(usage_data)
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# Perform explicit comparison with None as 0 is a valid value
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if in_use is not None:
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if delta:
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in_use = usage_data.in_use + in_use
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usage_data.in_use = in_use
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if reserved is not None:
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if delta:
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reserved = usage_data.reserved + reserved
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usage_data.reserved = reserved
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# After an explicit update the dirty bit should always be reset
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usage_data.dirty = False
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return QuotaUsageInfo(usage_data.resource,
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usage_data.tenant_id,
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usage_data.in_use,
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usage_data.reserved,
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usage_data.dirty)
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def set_quota_usage_dirty(context, resource, tenant_id, dirty=True):
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"""Set quota usage dirty bit for a given resource and tenant.
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:param resource: a resource for which quota usage if tracked
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:param tenant_id: tenant identifier
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:param dirty: the desired value for the dirty bit (defaults to True)
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:returns: 1 if the quota usage data were updated, 0 otherwise.
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"""
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query = common_db_api.model_query(context, quota_models.QuotaUsage)
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query = query.filter_by(resource=resource).filter_by(tenant_id=tenant_id)
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return query.update({'dirty': dirty})
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def set_resources_quota_usage_dirty(context, resources, tenant_id, dirty=True):
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"""Set quota usage dirty bit for a given tenant and multiple resources.
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:param resources: list of resource for which the dirty bit is going
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to be set
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:param tenant_id: tenant identifier
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:param dirty: the desired value for the dirty bit (defaults to True)
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:returns: the number of records for which the bit was actually set.
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"""
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query = common_db_api.model_query(context, quota_models.QuotaUsage)
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query = query.filter_by(tenant_id=tenant_id)
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if resources:
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query = query.filter(quota_models.QuotaUsage.resource.in_(resources))
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# synchronize_session=False needed because of the IN condition
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return query.update({'dirty': dirty}, synchronize_session=False)
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def set_all_quota_usage_dirty(context, resource, dirty=True):
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"""Set the dirty bit on quota usage for all tenants.
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:param resource: the resource for which the dirty bit should be set
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:returns: the number of tenants for which the dirty bit was
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actually updated
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"""
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query = common_db_api.model_query(context, quota_models.QuotaUsage)
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query = query.filter_by(resource=resource)
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return query.update({'dirty': dirty})
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