179 lines
7.3 KiB
Python
179 lines
7.3 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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#
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# Copyright 2013, Nachi Ueno, NTT MCL, Inc.
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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 netaddr
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from oslo.config import cfg
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import sqlalchemy as sa
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from sqlalchemy import orm
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from neutron.common import utils
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from neutron.db import db_base_plugin_v2
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from neutron.db import l3_db
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from neutron.db import model_base
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from neutron.db import models_v2
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from neutron.extensions import extraroute
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from neutron.extensions import l3
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from neutron.openstack.common import log as logging
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LOG = logging.getLogger(__name__)
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extra_route_opts = [
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#TODO(nati): use quota framework when it support quota for attributes
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cfg.IntOpt('max_routes', default=30,
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help=_("Maximum number of routes")),
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]
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cfg.CONF.register_opts(extra_route_opts)
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class RouterRoute(model_base.BASEV2, models_v2.Route):
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router_id = sa.Column(sa.String(36),
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sa.ForeignKey('routers.id',
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ondelete="CASCADE"),
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primary_key=True)
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router = orm.relationship(l3_db.Router,
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backref=orm.backref("route_list",
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lazy='joined',
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cascade='delete'))
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class ExtraRoute_db_mixin(l3_db.L3_NAT_db_mixin):
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"""Mixin class to support extra route configuration on router."""
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def _extend_router_dict_extraroute(self, router_res, router_db):
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router_res['routes'] = (ExtraRoute_db_mixin.
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_make_extra_route_list(
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router_db['route_list']
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))
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db_base_plugin_v2.NeutronDbPluginV2.register_dict_extend_funcs(
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l3.ROUTERS, ['_extend_router_dict_extraroute'])
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def update_router(self, context, id, router):
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r = router['router']
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with context.session.begin(subtransactions=True):
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#check if route exists and have permission to access
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router_db = self._get_router(context, id)
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if 'routes' in r:
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self._update_extra_routes(context, router_db, r['routes'])
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routes = self._get_extra_routes_by_router_id(context, id)
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router_updated = super(ExtraRoute_db_mixin, self).update_router(
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context, id, router)
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router_updated['routes'] = routes
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return router_updated
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def _get_subnets_by_cidr(self, context, cidr):
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query_subnets = context.session.query(models_v2.Subnet)
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return query_subnets.filter_by(cidr=cidr).all()
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def _validate_routes_nexthop(self, context, ports, routes, nexthop):
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#Note(nati): Nexthop should be connected,
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# so we need to check
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# nexthop belongs to one of cidrs of the router ports
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cidrs = []
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for port in ports:
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cidrs += [self._core_plugin._get_subnet(context,
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ip['subnet_id'])['cidr']
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for ip in port['fixed_ips']]
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if not netaddr.all_matching_cidrs(nexthop, cidrs):
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raise extraroute.InvalidRoutes(
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routes=routes,
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reason=_('the nexthop is not connected with router'))
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#Note(nati) nexthop should not be same as fixed_ips
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for port in ports:
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for ip in port['fixed_ips']:
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if nexthop == ip['ip_address']:
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raise extraroute.InvalidRoutes(
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routes=routes,
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reason=_('the nexthop is used by router'))
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def _validate_routes(self, context,
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router_id, routes):
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if len(routes) > cfg.CONF.max_routes:
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raise extraroute.RoutesExhausted(
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router_id=router_id,
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quota=cfg.CONF.max_routes)
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filters = {'device_id': [router_id]}
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ports = self._core_plugin.get_ports(context, filters)
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for route in routes:
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self._validate_routes_nexthop(
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context, ports, routes, route['nexthop'])
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def _update_extra_routes(self, context, router, routes):
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self._validate_routes(context, router['id'],
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routes)
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old_routes = self._get_extra_routes_by_router_id(
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context, router['id'])
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added, removed = utils.diff_list_of_dict(old_routes,
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routes)
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LOG.debug(_('Added routes are %s'), added)
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for route in added:
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router_routes = RouterRoute(
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router_id=router['id'],
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destination=route['destination'],
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nexthop=route['nexthop'])
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context.session.add(router_routes)
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LOG.debug(_('Removed routes are %s'), removed)
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for route in removed:
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del_context = context.session.query(RouterRoute)
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del_context.filter_by(router_id=router['id'],
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destination=route['destination'],
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nexthop=route['nexthop']).delete()
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@staticmethod
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def _make_extra_route_list(extra_routes):
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return [{'destination': route['destination'],
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'nexthop': route['nexthop']}
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for route in extra_routes]
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def _get_extra_routes_by_router_id(self, context, id):
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query = context.session.query(RouterRoute)
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query = query.filter_by(router_id=id)
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return self._make_extra_route_list(query)
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def get_router(self, context, id, fields=None):
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with context.session.begin(subtransactions=True):
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router = super(ExtraRoute_db_mixin, self).get_router(
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context, id, fields)
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return router
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def get_routers(self, context, filters=None, fields=None,
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sorts=None, limit=None, marker=None,
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page_reverse=False):
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with context.session.begin(subtransactions=True):
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routers = super(ExtraRoute_db_mixin, self).get_routers(
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context, filters, fields, sorts=sorts, limit=limit,
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marker=marker, page_reverse=page_reverse)
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return routers
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def _confirm_router_interface_not_in_use(self, context, router_id,
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subnet_id):
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super(ExtraRoute_db_mixin, self)._confirm_router_interface_not_in_use(
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context, router_id, subnet_id)
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subnet_db = self._core_plugin._get_subnet(context, subnet_id)
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subnet_cidr = netaddr.IPNetwork(subnet_db['cidr'])
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extra_routes = self._get_extra_routes_by_router_id(context, router_id)
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for route in extra_routes:
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if netaddr.all_matching_cidrs(route['nexthop'], [subnet_cidr]):
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raise extraroute.RouterInterfaceInUseByRoute(
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router_id=router_id, subnet_id=subnet_id)
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