251 lines
11 KiB
Python
251 lines
11 KiB
Python
# Copyright (c) 2013 OpenStack Foundation
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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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import collections
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import sys
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from neutron_lib import constants as p_const
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from neutron_lib import context
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from neutron_lib.db import api as lib_db_api
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from neutron_lib import exceptions as exc
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from neutron_lib.plugins.ml2 import api
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from neutron_lib.plugins import utils as plugin_utils
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from oslo_config import cfg
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from oslo_log import log
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from neutron._i18n import _
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from neutron.conf.plugins.ml2.drivers import driver_type
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from neutron.db import api as db_api
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from neutron.objects.plugins.ml2 import vlanallocation as vlanalloc
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from neutron.plugins.ml2.drivers import helpers
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LOG = log.getLogger(__name__)
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driver_type.register_ml2_drivers_vlan_opts()
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class VlanTypeDriver(helpers.SegmentTypeDriver):
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"""Manage state for VLAN networks with ML2.
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The VlanTypeDriver implements the 'vlan' network_type. VLAN
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network segments provide connectivity between VMs and other
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devices using any connected IEEE 802.1Q conformant
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physical_network segmented into virtual networks via IEEE 802.1Q
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headers. Up to 4094 VLAN network segments can exist on each
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available physical_network.
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"""
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def __init__(self):
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super(VlanTypeDriver, self).__init__(vlanalloc.VlanAllocation)
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self._parse_network_vlan_ranges()
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def _parse_network_vlan_ranges(self):
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try:
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self.network_vlan_ranges = plugin_utils.parse_network_vlan_ranges(
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cfg.CONF.ml2_type_vlan.network_vlan_ranges)
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except Exception:
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LOG.exception("Failed to parse network_vlan_ranges. "
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"Service terminated!")
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sys.exit(1)
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LOG.info("Network VLAN ranges: %s", self.network_vlan_ranges)
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@lib_db_api.retry_db_errors
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def _sync_vlan_allocations(self):
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ctx = context.get_admin_context()
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with db_api.context_manager.writer.using(ctx):
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# VLAN ranges per physical network:
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# {phy1: [(1, 10), (30, 50)], ...}
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ranges = self.network_vlan_ranges
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# Delete those VLAN registers from unconfigured physical networks
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physnets = vlanalloc.VlanAllocation.get_physical_networks(ctx)
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physnets_unconfigured = physnets - set(ranges)
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if physnets_unconfigured:
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LOG.debug('Removing any VLAN register on physical networks %s',
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physnets_unconfigured)
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vlanalloc.VlanAllocation.delete_physical_networks(
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ctx, physnets_unconfigured)
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# Get existing allocations for all configured physical networks
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allocations = collections.defaultdict(list)
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for alloc in vlanalloc.VlanAllocation.get_objects(ctx):
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allocations[alloc.physical_network].append(alloc)
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for physical_network, vlan_ranges in ranges.items():
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# determine current configured allocatable vlans for
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# this physical network
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vlan_ids = set()
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for vlan_min, vlan_max in vlan_ranges:
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vlan_ids |= set(range(vlan_min, vlan_max + 1))
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# remove from table unallocated vlans not currently
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# allocatable
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if physical_network in allocations:
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for alloc in allocations[physical_network]:
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try:
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# see if vlan is allocatable
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vlan_ids.remove(alloc.vlan_id)
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except KeyError:
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# it's not allocatable, so check if its allocated
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if not alloc.allocated:
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# it's not, so remove it from table
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LOG.debug("Removing vlan %(vlan_id)s on "
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"physical network "
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"%(physical_network)s from pool",
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{'vlan_id': alloc.vlan_id,
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'physical_network':
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physical_network})
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# This UPDATE WHERE statement blocks anyone
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# from concurrently changing the allocation
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# values to True while our transaction is
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# open so we don't accidentally delete
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# allocated segments. If someone has already
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# allocated, update_objects will return 0 so we
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# don't delete.
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if vlanalloc.VlanAllocation.update_objects(
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ctx, values={'allocated': False},
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allocated=False, vlan_id=alloc.vlan_id,
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physical_network=physical_network):
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alloc.delete()
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del allocations[physical_network]
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# Add missing allocatable VLAN registers for "physical_network"
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vlanalloc.VlanAllocation.bulk_create(ctx, physical_network,
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vlan_ids)
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def get_type(self):
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return p_const.TYPE_VLAN
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def initialize(self):
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self._sync_vlan_allocations()
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LOG.info("VlanTypeDriver initialization complete")
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def is_partial_segment(self, segment):
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return segment.get(api.SEGMENTATION_ID) is None
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def validate_provider_segment(self, segment):
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physical_network = segment.get(api.PHYSICAL_NETWORK)
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segmentation_id = segment.get(api.SEGMENTATION_ID)
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if physical_network:
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if physical_network not in self.network_vlan_ranges:
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msg = (_("physical_network '%s' unknown "
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"for VLAN provider network") % physical_network)
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raise exc.InvalidInput(error_message=msg)
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if segmentation_id is not None:
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if not plugin_utils.is_valid_vlan_tag(segmentation_id):
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msg = (_("segmentation_id out of range (%(min)s through "
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"%(max)s)") %
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{'min': p_const.MIN_VLAN_TAG,
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'max': p_const.MAX_VLAN_TAG})
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raise exc.InvalidInput(error_message=msg)
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else:
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if not self.network_vlan_ranges.get(physical_network):
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msg = (_("Physical network %s requires segmentation_id "
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"to be specified when creating a provider "
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"network") % physical_network)
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raise exc.InvalidInput(error_message=msg)
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elif segmentation_id is not None:
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msg = _("segmentation_id requires physical_network for VLAN "
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"provider network")
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raise exc.InvalidInput(error_message=msg)
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for key, value in segment.items():
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if value and key not in [api.NETWORK_TYPE,
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api.PHYSICAL_NETWORK,
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api.SEGMENTATION_ID]:
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msg = _("%s prohibited for VLAN provider network") % key
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raise exc.InvalidInput(error_message=msg)
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def reserve_provider_segment(self, context, segment):
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filters = {}
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physical_network = segment.get(api.PHYSICAL_NETWORK)
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if physical_network is not None:
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filters['physical_network'] = physical_network
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vlan_id = segment.get(api.SEGMENTATION_ID)
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if vlan_id is not None:
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filters['vlan_id'] = vlan_id
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if self.is_partial_segment(segment):
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alloc = self.allocate_partially_specified_segment(
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context, **filters)
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if not alloc:
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raise exc.NoNetworkAvailable()
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else:
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alloc = self.allocate_fully_specified_segment(
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context, **filters)
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if not alloc:
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raise exc.VlanIdInUse(**filters)
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return {api.NETWORK_TYPE: p_const.TYPE_VLAN,
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api.PHYSICAL_NETWORK: alloc.physical_network,
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api.SEGMENTATION_ID: alloc.vlan_id,
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api.MTU: self.get_mtu(alloc.physical_network)}
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def allocate_tenant_segment(self, context):
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for physnet in self.network_vlan_ranges:
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alloc = self.allocate_partially_specified_segment(
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context, physical_network=physnet)
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if alloc:
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break
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else:
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return
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return {api.NETWORK_TYPE: p_const.TYPE_VLAN,
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api.PHYSICAL_NETWORK: alloc.physical_network,
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api.SEGMENTATION_ID: alloc.vlan_id,
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api.MTU: self.get_mtu(alloc.physical_network)}
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def release_segment(self, context, segment):
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physical_network = segment[api.PHYSICAL_NETWORK]
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vlan_id = segment[api.SEGMENTATION_ID]
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ranges = self.network_vlan_ranges.get(physical_network, [])
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inside = any(lo <= vlan_id <= hi for lo, hi in ranges)
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count = False
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with db_api.context_manager.writer.using(context):
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alloc = vlanalloc.VlanAllocation.get_object(
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context, physical_network=physical_network, vlan_id=vlan_id)
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if alloc:
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if inside and alloc.allocated:
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count = True
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alloc.allocated = False
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alloc.update()
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LOG.debug("Releasing vlan %(vlan_id)s on physical "
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"network %(physical_network)s to pool",
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{'vlan_id': vlan_id,
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'physical_network': physical_network})
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else:
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count = True
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alloc.delete()
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LOG.debug("Releasing vlan %(vlan_id)s on physical "
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"network %(physical_network)s outside pool",
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{'vlan_id': vlan_id,
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'physical_network': physical_network})
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if not count:
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LOG.warning("No vlan_id %(vlan_id)s found on physical "
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"network %(physical_network)s",
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{'vlan_id': vlan_id,
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'physical_network': physical_network})
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def get_mtu(self, physical_network):
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seg_mtu = super(VlanTypeDriver, self).get_mtu()
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mtu = []
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if seg_mtu > 0:
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mtu.append(seg_mtu)
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if physical_network in self.physnet_mtus:
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mtu.append(int(self.physnet_mtus[physical_network]))
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return min(mtu) if mtu else 0
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