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OpenStack Study: db_base_plugin_v2.py**** CubicPower OpenStack Study ****
# vim: tabstop=4 shiftwidth=4 softtabstop=4 # Copyright (c) 2012 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. import random import netaddr from oslo.config import cfg from sqlalchemy import event from sqlalchemy import orm from sqlalchemy.orm import exc from neutron.api.v2 import attributes from neutron.common import constants from neutron.common import exceptions as n_exc from neutron import context as ctx from neutron.db import api as db from neutron.db import models_v2 from neutron.db import sqlalchemyutils from neutron.extensions import l3 from neutron import manager from neutron import neutron_plugin_base_v2 from neutron.notifiers import nova from neutron.openstack.common import excutils from neutron.openstack.common import log as logging from neutron.openstack.common import uuidutils from neutron.plugins.common import constants as service_constants LOG = logging.getLogger(__name__) # Ports with the following 'device_owner' values will not prevent # network deletion. If delete_network() finds that all ports on a # network have these owners, it will explicitly delete each port # and allow network deletion to continue. Similarly, if delete_subnet() # finds out that all existing IP Allocations are associated with ports # with these owners, it will allow subnet deletion to proceed with the # IP allocations being cleaned up by cascade. AUTO_DELETE_PORT_OWNERS = [constants.DEVICE_OWNER_DHCP]
**** CubicPower OpenStack Study **** class CommonDbMixin(object): """Common methods used in core and service plugins.""" # Plugins, mixin classes implementing extension will register # hooks into the dict below for "augmenting" the "core way" of # building a query for retrieving objects from a model class. # To this aim, the register_model_query_hook and unregister_query_hook # from this class should be invoked _model_query_hooks = {} # This dictionary will store methods for extending attributes of # api resources. Mixins can use this dict for adding their own methods # TODO(salvatore-orlando): Avoid using class-level variables _dict_extend_functions = {} @classmethod
**** CubicPower OpenStack Study **** def register_model_query_hook(cls, model, name, query_hook, filter_hook, result_filters=None): """Register a hook to be invoked when a query is executed. Add the hooks to the _model_query_hooks dict. Models are the keys of this dict, whereas the value is another dict mapping hook names to callables performing the hook. Each hook has a "query" component, used to build the query expression and a "filter" component, which is used to build the filter expression. Query hooks take as input the query being built and return a transformed query expression. Filter hooks take as input the filter expression being built and return a transformed filter expression """ model_hooks = cls._model_query_hooks.get(model) if not model_hooks: # add key to dict model_hooks = {} cls._model_query_hooks[model] = model_hooks model_hooks[name] = {'query': query_hook, 'filter': filter_hook, 'result_filters': result_filters}
**** CubicPower OpenStack Study **** def _model_query(self, context, model): query = context.session.query(model) # define basic filter condition for model query # NOTE(jkoelker) non-admin queries are scoped to their tenant_id # NOTE(salvatore-orlando): unless the model allows for shared objects query_filter = None if not context.is_admin and hasattr(model, 'tenant_id'): if hasattr(model, 'shared'): query_filter = ((model.tenant_id == context.tenant_id) | (model.shared == True)) else: query_filter = (model.tenant_id == context.tenant_id) # Execute query hooks registered from mixins and plugins for _name, hooks in self._model_query_hooks.get(model, {}).iteritems(): query_hook = hooks.get('query') if isinstance(query_hook, basestring): query_hook = getattr(self, query_hook, None) if query_hook: query = query_hook(context, model, query) filter_hook = hooks.get('filter') if isinstance(filter_hook, basestring): filter_hook = getattr(self, filter_hook, None) if filter_hook: query_filter = filter_hook(context, model, query_filter) # NOTE(salvatore-orlando): 'if query_filter' will try to evaluate the # condition, raising an exception if query_filter is not None: query = query.filter(query_filter) return query
**** CubicPower OpenStack Study **** def _fields(self, resource, fields): if fields: return dict(((key, item) for key, item in resource.items() if key in fields)) return resource
**** CubicPower OpenStack Study **** def _get_tenant_id_for_create(self, context, resource): if context.is_admin and 'tenant_id' in resource: tenant_id = resource['tenant_id'] elif ('tenant_id' in resource and resource['tenant_id'] != context.tenant_id): reason = _('Cannot create resource for another tenant') raise n_exc.AdminRequired(reason=reason) else: tenant_id = context.tenant_id return tenant_id
**** CubicPower OpenStack Study **** def _get_by_id(self, context, model, id): query = self._model_query(context, model) return query.filter(model.id == id).one()
**** CubicPower OpenStack Study **** def _apply_filters_to_query(self, query, model, filters): if filters: for key, value in filters.iteritems(): column = getattr(model, key, None) if column: query = query.filter(column.in_(value)) for _name, hooks in self._model_query_hooks.get(model, {}).iteritems(): result_filter = hooks.get('result_filters', None) if isinstance(result_filter, basestring): result_filter = getattr(self, result_filter, None) if result_filter: query = result_filter(query, filters) return query
**** CubicPower OpenStack Study **** def _apply_dict_extend_functions(self, resource_type, response, db_object): for func in self._dict_extend_functions.get( resource_type, []): args = (response, db_object) if isinstance(func, basestring): func = getattr(self, func, None) else: # must call unbound method - use self as 1st argument args = (self,) + args if func: func(*args)
**** CubicPower OpenStack Study **** def _get_collection_query(self, context, model, filters=None, sorts=None, limit=None, marker_obj=None, page_reverse=False): collection = self._model_query(context, model) collection = self._apply_filters_to_query(collection, model, filters) if limit and page_reverse and sorts: sorts = [(s[0], not s[1]) for s in sorts] collection = sqlalchemyutils.paginate_query(collection, model, limit, sorts, marker_obj=marker_obj) return collection
**** CubicPower OpenStack Study **** def _get_collection(self, context, model, dict_func, filters=None, fields=None, sorts=None, limit=None, marker_obj=None, page_reverse=False): query = self._get_collection_query(context, model, filters=filters, sorts=sorts, limit=limit, marker_obj=marker_obj, page_reverse=page_reverse) items = [dict_func(c, fields) for c in query] if limit and page_reverse: items.reverse() return items
**** CubicPower OpenStack Study **** def _get_collection_count(self, context, model, filters=None): return self._get_collection_query(context, model, filters).count()
**** CubicPower OpenStack Study **** def _get_marker_obj(self, context, resource, limit, marker): if limit and marker: return getattr(self, '_get_%s' % resource)(context, marker) return None
**** CubicPower OpenStack Study **** class NeutronDbPluginV2(neutron_plugin_base_v2.NeutronPluginBaseV2,
CommonDbMixin): """V2 Neutron plugin interface implementation using SQLAlchemy models. Whenever a non-read call happens the plugin will call an event handler class method (e.g., network_created()). The result is that this class can be sub-classed by other classes that add custom behaviors on certain events. """ # This attribute specifies whether the plugin supports or not # bulk/pagination/sorting operations. Name mangling is used in # order to ensure it is qualified by class __native_bulk_support = True __native_pagination_support = True __native_sorting_support = True
**** CubicPower OpenStack Study **** def __init__(self): db.configure_db() if cfg.CONF.notify_nova_on_port_status_changes: # NOTE(arosen) These event listners are here to hook into when # port status changes and notify nova about their change. self.nova_notifier = nova.Notifier() event.listen(models_v2.Port, 'after_insert', self.nova_notifier.send_port_status) event.listen(models_v2.Port, 'after_update', self.nova_notifier.send_port_status) event.listen(models_v2.Port.status, 'set', self.nova_notifier.record_port_status_changed) @classmethod
**** CubicPower OpenStack Study **** def register_dict_extend_funcs(cls, resource, funcs): cur_funcs = cls._dict_extend_functions.get(resource, []) cur_funcs.extend(funcs) cls._dict_extend_functions[resource] = cur_funcs
**** CubicPower OpenStack Study **** def _filter_non_model_columns(self, data, model): """Remove all the attributes from data which are not columns of the model passed as second parameter. """ columns = [c.name for c in model.__table__.columns] return dict((k, v) for (k, v) in data.iteritems() if k in columns)
**** CubicPower OpenStack Study **** def _get_network(self, context, id): try: network = self._get_by_id(context, models_v2.Network, id) except exc.NoResultFound: raise n_exc.NetworkNotFound(net_id=id) return network
**** CubicPower OpenStack Study **** def _get_subnet(self, context, id): try: subnet = self._get_by_id(context, models_v2.Subnet, id) except exc.NoResultFound: raise n_exc.SubnetNotFound(subnet_id=id) return subnet
**** CubicPower OpenStack Study **** def _get_port(self, context, id): try: port = self._get_by_id(context, models_v2.Port, id) except exc.NoResultFound: raise n_exc.PortNotFound(port_id=id) return port
**** CubicPower OpenStack Study **** def _get_dns_by_subnet(self, context, subnet_id): dns_qry = context.session.query(models_v2.DNSNameServer) return dns_qry.filter_by(subnet_id=subnet_id).all()
**** CubicPower OpenStack Study **** def _get_route_by_subnet(self, context, subnet_id): route_qry = context.session.query(models_v2.SubnetRoute) return route_qry.filter_by(subnet_id=subnet_id).all()
**** CubicPower OpenStack Study **** def _get_subnets_by_network(self, context, network_id): subnet_qry = context.session.query(models_v2.Subnet) return subnet_qry.filter_by(network_id=network_id).all()
**** CubicPower OpenStack Study **** def _get_all_subnets(self, context): # NOTE(salvatore-orlando): This query might end up putting # a lot of stress on the db. Consider adding a cache layer return context.session.query(models_v2.Subnet).all() @staticmethod
**** CubicPower OpenStack Study **** def _generate_mac(context, network_id): base_mac = cfg.CONF.base_mac.split(':') max_retries = cfg.CONF.mac_generation_retries for i in range(max_retries): mac = [int(base_mac[0], 16), int(base_mac[1], 16), int(base_mac[2], 16), random.randint(0x00, 0xff), random.randint(0x00, 0xff), random.randint(0x00, 0xff)] if base_mac[3] != '00': mac[3] = int(base_mac[3], 16) mac_address = ':'.join(map(lambda x: "%02x" % x, mac)) if NeutronDbPluginV2._check_unique_mac(context, network_id, mac_address): LOG.debug(_("Generated mac for network %(network_id)s " "is %(mac_address)s"), {'network_id': network_id, 'mac_address': mac_address}) return mac_address else: LOG.debug(_("Generated mac %(mac_address)s exists. Remaining " "attempts %(max_retries)s."), {'mac_address': mac_address, 'max_retries': max_retries - (i + 1)}) LOG.error(_("Unable to generate mac address after %s attempts"), max_retries) raise n_exc.MacAddressGenerationFailure(net_id=network_id) @staticmethod
**** CubicPower OpenStack Study **** def _check_unique_mac(context, network_id, mac_address): mac_qry = context.session.query(models_v2.Port) try: mac_qry.filter_by(network_id=network_id, mac_address=mac_address).one() except exc.NoResultFound: return True return False @staticmethod
**** CubicPower OpenStack Study **** def _delete_ip_allocation(context, network_id, subnet_id, ip_address): # Delete the IP address from the IPAllocate table LOG.debug(_("Delete allocated IP %(ip_address)s " "(%(network_id)s/%(subnet_id)s)"), {'ip_address': ip_address, 'network_id': network_id, 'subnet_id': subnet_id}) context.session.query(models_v2.IPAllocation).filter_by( network_id=network_id, ip_address=ip_address, subnet_id=subnet_id).delete() @staticmethod
**** CubicPower OpenStack Study **** def _generate_ip(context, subnets): try: return NeutronDbPluginV2._try_generate_ip(context, subnets) except n_exc.IpAddressGenerationFailure: NeutronDbPluginV2._rebuild_availability_ranges(context, subnets) return NeutronDbPluginV2._try_generate_ip(context, subnets) @staticmethod
**** CubicPower OpenStack Study **** def _try_generate_ip(context, subnets): """Generate an IP address. The IP address will be generated from one of the subnets defined on the network. """ range_qry = context.session.query( models_v2.IPAvailabilityRange).join( models_v2.IPAllocationPool).with_lockmode('update') for subnet in subnets: range = range_qry.filter_by(subnet_id=subnet['id']).first() if not range: LOG.debug(_("All IPs from subnet %(subnet_id)s (%(cidr)s) " "allocated"), {'subnet_id': subnet['id'], 'cidr': subnet['cidr']}) continue ip_address = range['first_ip'] LOG.debug(_("Allocated IP - %(ip_address)s from %(first_ip)s " "to %(last_ip)s"), {'ip_address': ip_address, 'first_ip': range['first_ip'], 'last_ip': range['last_ip']}) if range['first_ip'] == range['last_ip']: # No more free indices on subnet => delete LOG.debug(_("No more free IP's in slice. Deleting allocation " "pool.")) context.session.delete(range) else: # increment the first free range['first_ip'] = str(netaddr.IPAddress(ip_address) + 1) return {'ip_address': ip_address, 'subnet_id': subnet['id']} raise n_exc.IpAddressGenerationFailure(net_id=subnets[0]['network_id']) @staticmethod
**** CubicPower OpenStack Study **** def _rebuild_availability_ranges(context, subnets): ip_qry = context.session.query( models_v2.IPAllocation).with_lockmode('update') # PostgreSQL does not support select...for update with an outer join. # No join is needed here. pool_qry = context.session.query( models_v2.IPAllocationPool).options( orm.noload('available_ranges')).with_lockmode('update') for subnet in sorted(subnets): LOG.debug(_("Rebuilding availability ranges for subnet %s") % subnet) # Create a set of all currently allocated addresses ip_qry_results = ip_qry.filter_by(subnet_id=subnet['id']) allocations = netaddr.IPSet([netaddr.IPAddress(i['ip_address']) for i in ip_qry_results]) for pool in pool_qry.filter_by(subnet_id=subnet['id']): # Create a set of all addresses in the pool poolset = netaddr.IPSet(netaddr.iter_iprange(pool['first_ip'], pool['last_ip'])) # Use set difference to find free addresses in the pool available = poolset - allocations # Generator compacts an ip set into contiguous ranges def ipset_to_ranges(ipset): first, last = None, None for cidr in ipset.iter_cidrs(): if last and last + 1 != cidr.first: yield netaddr.IPRange(first, last) first = None first, last = first if first else cidr.first, cidr.last if first: yield netaddr.IPRange(first, last) # Write the ranges to the db for range in ipset_to_ranges(available): available_range = models_v2.IPAvailabilityRange( allocation_pool_id=pool['id'], first_ip=str(netaddr.IPAddress(range.first)), last_ip=str(netaddr.IPAddress(range.last))) context.session.add(available_range) @staticmethod
**** CubicPower OpenStack Study **** def _allocate_specific_ip(context, subnet_id, ip_address): """Allocate a specific IP address on the subnet.""" ip = int(netaddr.IPAddress(ip_address)) range_qry = context.session.query( models_v2.IPAvailabilityRange).join( models_v2.IPAllocationPool).with_lockmode('update') results = range_qry.filter_by(subnet_id=subnet_id) for range in results: first = int(netaddr.IPAddress(range['first_ip'])) last = int(netaddr.IPAddress(range['last_ip'])) if first <= ip <= last: if first == last: context.session.delete(range) return elif first == ip: range['first_ip'] = str(netaddr.IPAddress(ip_address) + 1) return elif last == ip: range['last_ip'] = str(netaddr.IPAddress(ip_address) - 1) return else: # Split into two ranges new_first = str(netaddr.IPAddress(ip_address) + 1) new_last = range['last_ip'] range['last_ip'] = str(netaddr.IPAddress(ip_address) - 1) ip_range = models_v2.IPAvailabilityRange( allocation_pool_id=range['allocation_pool_id'], first_ip=new_first, last_ip=new_last) context.session.add(ip_range) return @staticmethod
**** CubicPower OpenStack Study **** def _check_unique_ip(context, network_id, subnet_id, ip_address): """Validate that the IP address on the subnet is not in use.""" ip_qry = context.session.query(models_v2.IPAllocation) try: ip_qry.filter_by(network_id=network_id, subnet_id=subnet_id, ip_address=ip_address).one() except exc.NoResultFound: return True return False @staticmethod
**** CubicPower OpenStack Study **** def _check_subnet_ip(cidr, ip_address): """Validate that the IP address is on the subnet.""" ip = netaddr.IPAddress(ip_address) net = netaddr.IPNetwork(cidr) # Check that the IP is valid on subnet. This cannot be the # network or the broadcast address if (ip != net.network and ip != net.broadcast and net.netmask & ip == net.network): return True return False @staticmethod
**** CubicPower OpenStack Study **** def _check_ip_in_allocation_pool(context, subnet_id, gateway_ip, ip_address): """Validate IP in allocation pool. Validates that the IP address is either the default gateway or in the allocation pools of the subnet. """ # Check if the IP is the gateway if ip_address == gateway_ip: # Gateway is not in allocation pool return False # Check if the requested IP is in a defined allocation pool pool_qry = context.session.query(models_v2.IPAllocationPool) allocation_pools = pool_qry.filter_by(subnet_id=subnet_id) ip = netaddr.IPAddress(ip_address) for allocation_pool in allocation_pools: allocation_pool_range = netaddr.IPRange( allocation_pool['first_ip'], allocation_pool['last_ip']) if ip in allocation_pool_range: return True return False
**** CubicPower OpenStack Study **** def _test_fixed_ips_for_port(self, context, network_id, fixed_ips): """Test fixed IPs for port. Check that configured subnets are valid prior to allocating any IPs. Include the subnet_id in the result if only an IP address is configured. :raises: InvalidInput, IpAddressInUse """ fixed_ip_set = [] for fixed in fixed_ips: found = False if 'subnet_id' not in fixed: if 'ip_address' not in fixed: msg = _('IP allocation requires subnet_id or ip_address') raise n_exc.InvalidInput(error_message=msg) filter = {'network_id': [network_id]} subnets = self.get_subnets(context, filters=filter) for subnet in subnets: if NeutronDbPluginV2._check_subnet_ip(subnet['cidr'], fixed['ip_address']): found = True subnet_id = subnet['id'] break if not found: msg = _('IP address %s is not a valid IP for the defined ' 'networks subnets') % fixed['ip_address'] raise n_exc.InvalidInput(error_message=msg) else: subnet = self._get_subnet(context, fixed['subnet_id']) if subnet['network_id'] != network_id: msg = (_("Failed to create port on network %(network_id)s" ", because fixed_ips included invalid subnet " "%(subnet_id)s") % {'network_id': network_id, 'subnet_id': fixed['subnet_id']}) raise n_exc.InvalidInput(error_message=msg) subnet_id = subnet['id'] if 'ip_address' in fixed: # Ensure that the IP's are unique if not NeutronDbPluginV2._check_unique_ip(context, network_id, subnet_id, fixed['ip_address']): raise n_exc.IpAddressInUse(net_id=network_id, ip_address=fixed['ip_address']) # Ensure that the IP is valid on the subnet if (not found and not NeutronDbPluginV2._check_subnet_ip( subnet['cidr'], fixed['ip_address'])): msg = _('IP address %s is not a valid IP for the defined ' 'subnet') % fixed['ip_address'] raise n_exc.InvalidInput(error_message=msg) fixed_ip_set.append({'subnet_id': subnet_id, 'ip_address': fixed['ip_address']}) else: fixed_ip_set.append({'subnet_id': subnet_id}) if len(fixed_ip_set) > cfg.CONF.max_fixed_ips_per_port: msg = _('Exceeded maximim amount of fixed ips per port') raise n_exc.InvalidInput(error_message=msg) return fixed_ip_set
**** CubicPower OpenStack Study **** def _allocate_fixed_ips(self, context, network, fixed_ips): """Allocate IP addresses according to the configured fixed_ips.""" ips = [] for fixed in fixed_ips: if 'ip_address' in fixed: # Remove the IP address from the allocation pool NeutronDbPluginV2._allocate_specific_ip( context, fixed['subnet_id'], fixed['ip_address']) ips.append({'ip_address': fixed['ip_address'], 'subnet_id': fixed['subnet_id']}) # Only subnet ID is specified => need to generate IP # from subnet else: subnets = [self._get_subnet(context, fixed['subnet_id'])] # IP address allocation result = self._generate_ip(context, subnets) ips.append({'ip_address': result['ip_address'], 'subnet_id': result['subnet_id']}) return ips
**** CubicPower OpenStack Study **** def _update_ips_for_port(self, context, network_id, port_id, original_ips, new_ips): """Add or remove IPs from the port.""" ips = [] # These ips are still on the port and haven't been removed prev_ips = [] # the new_ips contain all of the fixed_ips that are to be updated if len(new_ips) > cfg.CONF.max_fixed_ips_per_port: msg = _('Exceeded maximim amount of fixed ips per port') raise n_exc.InvalidInput(error_message=msg) # Remove all of the intersecting elements for original_ip in original_ips[:]: for new_ip in new_ips[:]: if ('ip_address' in new_ip and original_ip['ip_address'] == new_ip['ip_address']): original_ips.remove(original_ip) new_ips.remove(new_ip) prev_ips.append(original_ip) # Check if the IP's to add are OK to_add = self._test_fixed_ips_for_port(context, network_id, new_ips) for ip in original_ips: LOG.debug(_("Port update. Hold %s"), ip) NeutronDbPluginV2._delete_ip_allocation(context, network_id, ip['subnet_id'], ip['ip_address']) if to_add: LOG.debug(_("Port update. Adding %s"), to_add) network = self._get_network(context, network_id) ips = self._allocate_fixed_ips(context, network, to_add) return ips, prev_ips
**** CubicPower OpenStack Study **** def _allocate_ips_for_port(self, context, network, port): """Allocate IP addresses for the port. If port['fixed_ips'] is set to 'ATTR_NOT_SPECIFIED', allocate IP addresses for the port. If port['fixed_ips'] contains an IP address or a subnet_id then allocate an IP address accordingly. """ p = port['port'] ips = [] fixed_configured = p['fixed_ips'] is not attributes.ATTR_NOT_SPECIFIED if fixed_configured: configured_ips = self._test_fixed_ips_for_port(context, p["network_id"], p['fixed_ips']) ips = self._allocate_fixed_ips(context, network, configured_ips) else: filter = {'network_id': [p['network_id']]} subnets = self.get_subnets(context, filters=filter) # Split into v4 and v6 subnets v4 = [] v6 = [] for subnet in subnets: if subnet['ip_version'] == 4: v4.append(subnet) else: v6.append(subnet) version_subnets = [v4, v6] for subnets in version_subnets: if subnets: result = NeutronDbPluginV2._generate_ip(context, subnets) ips.append({'ip_address': result['ip_address'], 'subnet_id': result['subnet_id']}) return ips
**** CubicPower OpenStack Study **** def _validate_subnet_cidr(self, context, network, new_subnet_cidr): """Validate the CIDR for a subnet. Verifies the specified CIDR does not overlap with the ones defined for the other subnets specified for this network, or with any other CIDR if overlapping IPs are disabled. """ new_subnet_ipset = netaddr.IPSet([new_subnet_cidr]) if cfg.CONF.allow_overlapping_ips: subnet_list = network.subnets else: subnet_list = self._get_all_subnets(context) for subnet in subnet_list: if (netaddr.IPSet([subnet.cidr]) & new_subnet_ipset): # don't give out details of the overlapping subnet err_msg = (_("Requested subnet with cidr: %(cidr)s for " "network: %(network_id)s overlaps with another " "subnet") % {'cidr': new_subnet_cidr, 'network_id': network.id}) LOG.info(_("Validation for CIDR: %(new_cidr)s failed - " "overlaps with subnet %(subnet_id)s " "(CIDR: %(cidr)s)"), {'new_cidr': new_subnet_cidr, 'subnet_id': subnet.id, 'cidr': subnet.cidr}) raise n_exc.InvalidInput(error_message=err_msg)
**** CubicPower OpenStack Study **** def _validate_allocation_pools(self, ip_pools, subnet_cidr): """Validate IP allocation pools. Verify start and end address for each allocation pool are valid, ie: constituted by valid and appropriately ordered IP addresses. Also, verify pools do not overlap among themselves. Finally, verify that each range fall within the subnet's CIDR. """ subnet = netaddr.IPNetwork(subnet_cidr) subnet_first_ip = netaddr.IPAddress(subnet.first + 1) subnet_last_ip = netaddr.IPAddress(subnet.last - 1) LOG.debug(_("Performing IP validity checks on allocation pools")) ip_sets = [] for ip_pool in ip_pools: try: start_ip = netaddr.IPAddress(ip_pool['start']) end_ip = netaddr.IPAddress(ip_pool['end']) except netaddr.AddrFormatError: LOG.info(_("Found invalid IP address in pool: " "%(start)s - %(end)s:"), {'start': ip_pool['start'], 'end': ip_pool['end']}) raise n_exc.InvalidAllocationPool(pool=ip_pool) if (start_ip.version != subnet.version or end_ip.version != subnet.version): LOG.info(_("Specified IP addresses do not match " "the subnet IP version")) raise n_exc.InvalidAllocationPool(pool=ip_pool) if end_ip < start_ip: LOG.info(_("Start IP (%(start)s) is greater than end IP " "(%(end)s)"), {'start': ip_pool['start'], 'end': ip_pool['end']}) raise n_exc.InvalidAllocationPool(pool=ip_pool) if start_ip < subnet_first_ip or end_ip > subnet_last_ip: LOG.info(_("Found pool larger than subnet " "CIDR:%(start)s - %(end)s"), {'start': ip_pool['start'], 'end': ip_pool['end']}) raise n_exc.OutOfBoundsAllocationPool( pool=ip_pool, subnet_cidr=subnet_cidr) # Valid allocation pool # Create an IPSet for it for easily verifying overlaps ip_sets.append(netaddr.IPSet(netaddr.IPRange( ip_pool['start'], ip_pool['end']).cidrs())) LOG.debug(_("Checking for overlaps among allocation pools " "and gateway ip")) ip_ranges = ip_pools[:] # Use integer cursors as an efficient way for implementing # comparison and avoiding comparing the same pair twice for l_cursor in range(len(ip_sets)): for r_cursor in range(l_cursor + 1, len(ip_sets)): if ip_sets[l_cursor] & ip_sets[r_cursor]: l_range = ip_ranges[l_cursor] r_range = ip_ranges[r_cursor] LOG.info(_("Found overlapping ranges: %(l_range)s and " "%(r_range)s"), {'l_range': l_range, 'r_range': r_range}) raise n_exc.OverlappingAllocationPools( pool_1=l_range, pool_2=r_range, subnet_cidr=subnet_cidr)
**** CubicPower OpenStack Study **** def _validate_host_route(self, route, ip_version): try: netaddr.IPNetwork(route['destination']) netaddr.IPAddress(route['nexthop']) except netaddr.core.AddrFormatError: err_msg = _("Invalid route: %s") % route raise n_exc.InvalidInput(error_message=err_msg) except ValueError: # netaddr.IPAddress would raise this err_msg = _("Invalid route: %s") % route raise n_exc.InvalidInput(error_message=err_msg) self._validate_ip_version(ip_version, route['nexthop'], 'nexthop') self._validate_ip_version(ip_version, route['destination'], 'destination')
**** CubicPower OpenStack Study **** def _allocate_pools_for_subnet(self, context, subnet): """Create IP allocation pools for a given subnet Pools are defined by the 'allocation_pools' attribute, a list of dict objects with 'start' and 'end' keys for defining the pool range. """ pools = [] # Auto allocate the pool around gateway_ip net = netaddr.IPNetwork(subnet['cidr']) first_ip = net.first + 1 last_ip = net.last - 1 gw_ip = int(netaddr.IPAddress(subnet['gateway_ip'] or net.last)) # Use the gw_ip to find a point for splitting allocation pools # for this subnet split_ip = min(max(gw_ip, net.first), net.last) if split_ip > first_ip: pools.append({'start': str(netaddr.IPAddress(first_ip)), 'end': str(netaddr.IPAddress(split_ip - 1))}) if split_ip < last_ip: pools.append({'start': str(netaddr.IPAddress(split_ip + 1)), 'end': str(netaddr.IPAddress(last_ip))}) # return auto-generated pools # no need to check for their validity return pools
**** CubicPower OpenStack Study **** def _validate_shared_update(self, context, id, original, updated): # The only case that needs to be validated is when 'shared' # goes from True to False if updated['shared'] == original.shared or updated['shared']: return ports = self._model_query( context, models_v2.Port).filter( models_v2.Port.network_id == id) subnets = self._model_query( context, models_v2.Subnet).filter( models_v2.Subnet.network_id == id) tenant_ids = set([port['tenant_id'] for port in ports] + [subnet['tenant_id'] for subnet in subnets]) # raise if multiple tenants found or if the only tenant found # is not the owner of the network if (len(tenant_ids) > 1 or len(tenant_ids) == 1 and tenant_ids.pop() != original.tenant_id): raise n_exc.InvalidSharedSetting(network=original.name)
**** CubicPower OpenStack Study **** def _validate_ipv6_attributes(self, subnet, cur_subnet): ra_mode_set = attributes.is_attr_set(subnet.get('ipv6_ra_mode')) address_mode_set = attributes.is_attr_set( subnet.get('ipv6_address_mode')) if cur_subnet: ra_mode = (subnet['ipv6_ra_mode'] if ra_mode_set else cur_subnet['ipv6_ra_mode']) addr_mode = (subnet['ipv6_address_mode'] if address_mode_set else cur_subnet['ipv6_address_mode']) if ra_mode_set or address_mode_set: # Check that updated subnet ipv6 attributes do not conflict self._validate_ipv6_combination(ra_mode, addr_mode) self._validate_ipv6_update_dhcp(subnet, cur_subnet) else: self._validate_ipv6_dhcp(ra_mode_set, address_mode_set, subnet['enable_dhcp']) if ra_mode_set and address_mode_set: self._validate_ipv6_combination(subnet['ipv6_ra_mode'], subnet['ipv6_address_mode'])
**** CubicPower OpenStack Study **** def _validate_ipv6_combination(self, ra_mode, address_mode): if ra_mode != address_mode: msg = _("ipv6_ra_mode set to '%(ra_mode)s' with ipv6_address_mode " "set to '%(addr_mode)s' is not valid. " "If both attributes are set, they must be the same value" ) % {'ra_mode': ra_mode, 'addr_mode': address_mode} raise n_exc.InvalidInput(error_message=msg)
**** CubicPower OpenStack Study **** def _validate_ipv6_dhcp(self, ra_mode_set, address_mode_set, enable_dhcp): if (ra_mode_set or address_mode_set) and not enable_dhcp: msg = _("ipv6_ra_mode or ipv6_address_mode cannot be set when " "enable_dhcp is set to False.") raise n_exc.InvalidInput(error_message=msg)
**** CubicPower OpenStack Study **** def _validate_ipv6_update_dhcp(self, subnet, cur_subnet): if ('enable_dhcp' in subnet and not subnet['enable_dhcp']): msg = _("Cannot disable enable_dhcp with " "ipv6 attributes set") ra_mode_set = attributes.is_attr_set(subnet.get('ipv6_ra_mode')) address_mode_set = attributes.is_attr_set( subnet.get('ipv6_address_mode')) if ra_mode_set or address_mode_set: raise n_exc.InvalidInput(error_message=msg) old_ra_mode_set = attributes.is_attr_set( cur_subnet.get('ipv6_ra_mode')) old_address_mode_set = attributes.is_attr_set( cur_subnet.get('ipv6_address_mode')) if old_ra_mode_set or old_address_mode_set: raise n_exc.InvalidInput(error_message=msg)
**** CubicPower OpenStack Study **** def _make_network_dict(self, network, fields=None, process_extensions=True): res = {'id': network['id'], 'name': network['name'], 'tenant_id': network['tenant_id'], 'admin_state_up': network['admin_state_up'], 'status': network['status'], 'shared': network['shared'], 'subnets': [subnet['id'] for subnet in network['subnets']]} # Call auxiliary extend functions, if any if process_extensions: self._apply_dict_extend_functions( attributes.NETWORKS, res, network) return self._fields(res, fields)
**** CubicPower OpenStack Study **** def _make_subnet_dict(self, subnet, fields=None): res = {'id': subnet['id'], 'name': subnet['name'], 'tenant_id': subnet['tenant_id'], 'network_id': subnet['network_id'], 'ip_version': subnet['ip_version'], 'cidr': subnet['cidr'], 'allocation_pools': [{'start': pool['first_ip'], 'end': pool['last_ip']} for pool in subnet['allocation_pools']], 'gateway_ip': subnet['gateway_ip'], 'enable_dhcp': subnet['enable_dhcp'], 'ipv6_ra_mode': subnet['ipv6_ra_mode'], 'ipv6_address_mode': subnet['ipv6_address_mode'], 'dns_nameservers': [dns['address'] for dns in subnet['dns_nameservers']], 'host_routes': [{'destination': route['destination'], 'nexthop': route['nexthop']} for route in subnet['routes']], 'shared': subnet['shared'] } return self._fields(res, fields)
**** CubicPower OpenStack Study **** def _make_port_dict(self, port, fields=None, process_extensions=True): res = {"id": port["id"], 'name': port['name'], "network_id": port["network_id"], 'tenant_id': port['tenant_id'], "mac_address": port["mac_address"], "admin_state_up": port["admin_state_up"], "status": port["status"], "fixed_ips": [{'subnet_id': ip["subnet_id"], 'ip_address': ip["ip_address"]} for ip in port["fixed_ips"]], "device_id": port["device_id"], "device_owner": port["device_owner"]} # Call auxiliary extend functions, if any if process_extensions: self._apply_dict_extend_functions( attributes.PORTS, res, port) return self._fields(res, fields)
**** CubicPower OpenStack Study **** def _create_bulk(self, resource, context, request_items): objects = [] collection = "%ss" % resource items = request_items[collection] context.session.begin(subtransactions=True) try: for item in items: obj_creator = getattr(self, 'create_%s' % resource) objects.append(obj_creator(context, item)) context.session.commit() except Exception: context.session.rollback() with excutils.save_and_reraise_exception(): LOG.error(_("An exception occurred while creating " "the %(resource)s:%(item)s"), {'resource': resource, 'item': item}) return objects
**** CubicPower OpenStack Study **** def create_network_bulk(self, context, networks): return self._create_bulk('network', context, networks)
**** CubicPower OpenStack Study **** def create_network(self, context, network): """Handle creation of a single network.""" # single request processing n = network['network'] # NOTE(jkoelker) Get the tenant_id outside of the session to avoid # unneeded db action if the operation raises tenant_id = self._get_tenant_id_for_create(context, n) with context.session.begin(subtransactions=True): args = {'tenant_id': tenant_id, 'id': n.get('id') or uuidutils.generate_uuid(), 'name': n['name'], 'admin_state_up': n['admin_state_up'], 'shared': n['shared'], 'status': n.get('status', constants.NET_STATUS_ACTIVE)} network = models_v2.Network(**args) context.session.add(network) return self._make_network_dict(network, process_extensions=False)
**** CubicPower OpenStack Study **** def update_network(self, context, id, network): n = network['network'] with context.session.begin(subtransactions=True): network = self._get_network(context, id) # validate 'shared' parameter if 'shared' in n: self._validate_shared_update(context, id, network, n) network.update(n) # also update shared in all the subnets for this network subnets = self._get_subnets_by_network(context, id) for subnet in subnets: subnet['shared'] = network['shared'] return self._make_network_dict(network)
**** CubicPower OpenStack Study **** def delete_network(self, context, id): with context.session.begin(subtransactions=True): network = self._get_network(context, id) filters = {'network_id': [id]} # NOTE(armando-migliaccio): stick with base plugin query = context.session.query( models_v2.Port).enable_eagerloads(False) ports = self._apply_filters_to_query( query, models_v2.Port, filters).with_lockmode('update') # check if there are any tenant owned ports in-use only_auto_del = all(p['device_owner'] in AUTO_DELETE_PORT_OWNERS for p in ports) if not only_auto_del: raise n_exc.NetworkInUse(net_id=id) # clean up network owned ports for port in ports: self._delete_port(context, port['id']) # clean up subnets subnets_qry = context.session.query(models_v2.Subnet) subnets_qry.filter_by(network_id=id).delete() context.session.delete(network)
**** CubicPower OpenStack Study **** def get_network(self, context, id, fields=None): network = self._get_network(context, id) return self._make_network_dict(network, fields)
**** CubicPower OpenStack Study **** def get_networks(self, context, filters=None, fields=None, sorts=None, limit=None, marker=None, page_reverse=False): marker_obj = self._get_marker_obj(context, 'network', limit, marker) return self._get_collection(context, models_v2.Network, self._make_network_dict, filters=filters, fields=fields, sorts=sorts, limit=limit, marker_obj=marker_obj, page_reverse=page_reverse)
**** CubicPower OpenStack Study **** def get_networks_count(self, context, filters=None): return self._get_collection_count(context, models_v2.Network, filters=filters)
**** CubicPower OpenStack Study **** def create_subnet_bulk(self, context, subnets): return self._create_bulk('subnet', context, subnets)
**** CubicPower OpenStack Study **** def _validate_ip_version(self, ip_version, addr, name): """Check IP field of a subnet match specified ip version.""" ip = netaddr.IPNetwork(addr) if ip.version != ip_version: data = {'name': name, 'addr': addr, 'ip_version': ip_version} msg = _("%(name)s '%(addr)s' does not match " "the ip_version '%(ip_version)s'") % data raise n_exc.InvalidInput(error_message=msg)
**** CubicPower OpenStack Study **** def _validate_subnet(self, context, s, cur_subnet=None): """Validate a subnet spec.""" # This method will validate attributes which may change during # create_subnet() and update_subnet(). # The method requires the subnet spec 's' has 'ip_version' field. # If 's' dict does not have 'ip_version' field in an API call # (e.g., update_subnet()), you need to set 'ip_version' field # before calling this method. ip_ver = s['ip_version'] if 'cidr' in s: self._validate_ip_version(ip_ver, s['cidr'], 'cidr') if attributes.is_attr_set(s.get('gateway_ip')): self._validate_ip_version(ip_ver, s['gateway_ip'], 'gateway_ip') if (cfg.CONF.force_gateway_on_subnet and not NeutronDbPluginV2._check_subnet_ip(s['cidr'], s['gateway_ip'])): error_message = _("Gateway is not valid on subnet") raise n_exc.InvalidInput(error_message=error_message) # Ensure the gateway IP is not assigned to any port # skip this check in case of create (s parameter won't have id) # NOTE(salv-orlando): There is slight chance of a race, when # a subnet-update and a router-interface-add operation are # executed concurrently if cur_subnet: alloc_qry = context.session.query(models_v2.IPAllocation) allocated = alloc_qry.filter_by( ip_address=cur_subnet['gateway_ip'], subnet_id=cur_subnet['id']).first() if allocated and allocated['port_id']: raise n_exc.GatewayIpInUse( ip_address=cur_subnet['gateway_ip'], port_id=allocated['port_id']) if attributes.is_attr_set(s.get('dns_nameservers')): if len(s['dns_nameservers']) > cfg.CONF.max_dns_nameservers: raise n_exc.DNSNameServersExhausted( subnet_id=s.get('id', _('new subnet')), quota=cfg.CONF.max_dns_nameservers) for dns in s['dns_nameservers']: try: netaddr.IPAddress(dns) except Exception: raise n_exc.InvalidInput( error_message=(_("Error parsing dns address %s") % dns)) self._validate_ip_version(ip_ver, dns, 'dns_nameserver') if attributes.is_attr_set(s.get('host_routes')): if len(s['host_routes']) > cfg.CONF.max_subnet_host_routes: raise n_exc.HostRoutesExhausted( subnet_id=s.get('id', _('new subnet')), quota=cfg.CONF.max_subnet_host_routes) # check if the routes are all valid for rt in s['host_routes']: self._validate_host_route(rt, ip_ver) if ip_ver == 6: self._validate_ipv6_attributes(s, cur_subnet)
**** CubicPower OpenStack Study **** def _validate_gw_out_of_pools(self, gateway_ip, pools): for allocation_pool in pools: pool_range = netaddr.IPRange( allocation_pool['start'], allocation_pool['end']) if netaddr.IPAddress(gateway_ip) in pool_range: raise n_exc.GatewayConflictWithAllocationPools( pool=pool_range, ip_address=gateway_ip)
**** CubicPower OpenStack Study **** def create_subnet(self, context, subnet): net = netaddr.IPNetwork(subnet['subnet']['cidr']) # turn the CIDR into a proper subnet subnet['subnet']['cidr'] = '%s/%s' % (net.network, net.prefixlen) s = subnet['subnet'] if s['gateway_ip'] is attributes.ATTR_NOT_SPECIFIED: s['gateway_ip'] = str(netaddr.IPAddress(net.first + 1)) if s['allocation_pools'] == attributes.ATTR_NOT_SPECIFIED: s['allocation_pools'] = self._allocate_pools_for_subnet(context, s) else: self._validate_allocation_pools(s['allocation_pools'], s['cidr']) if s['gateway_ip'] is not None: self._validate_gw_out_of_pools(s['gateway_ip'], s['allocation_pools']) self._validate_subnet(context, s) tenant_id = self._get_tenant_id_for_create(context, s) with context.session.begin(subtransactions=True): network = self._get_network(context, s["network_id"]) self._validate_subnet_cidr(context, network, s['cidr']) # The 'shared' attribute for subnets is for internal plugin # use only. It is not exposed through the API args = {'tenant_id': tenant_id, 'id': s.get('id') or uuidutils.generate_uuid(), 'name': s['name'], 'network_id': s['network_id'], 'ip_version': s['ip_version'], 'cidr': s['cidr'], 'enable_dhcp': s['enable_dhcp'], 'gateway_ip': s['gateway_ip'], 'shared': network.shared} if s['ip_version'] == 6 and s['enable_dhcp']: if attributes.is_attr_set(s.get('ipv6_ra_mode')): args['ipv6_ra_mode'] = s['ipv6_ra_mode'] if attributes.is_attr_set(s.get('ipv6_address_mode')): args['ipv6_address_mode'] = s['ipv6_address_mode'] subnet = models_v2.Subnet(**args) context.session.add(subnet) if s['dns_nameservers'] is not attributes.ATTR_NOT_SPECIFIED: for addr in s['dns_nameservers']: ns = models_v2.DNSNameServer(address=addr, subnet_id=subnet.id) context.session.add(ns) if s['host_routes'] is not attributes.ATTR_NOT_SPECIFIED: for rt in s['host_routes']: route = models_v2.SubnetRoute( subnet_id=subnet.id, destination=rt['destination'], nexthop=rt['nexthop']) context.session.add(route) for pool in s['allocation_pools']: ip_pool = models_v2.IPAllocationPool(subnet=subnet, first_ip=pool['start'], last_ip=pool['end']) context.session.add(ip_pool) ip_range = models_v2.IPAvailabilityRange( ipallocationpool=ip_pool, first_ip=pool['start'], last_ip=pool['end']) context.session.add(ip_range) return self._make_subnet_dict(subnet)
**** CubicPower OpenStack Study **** def update_subnet(self, context, id, subnet): """Update the subnet with new info. The change however will not be realized until the client renew the dns lease or we support gratuitous DHCP offers """ s = subnet['subnet'] changed_host_routes = False changed_dns = False db_subnet = self._get_subnet(context, id) # Fill 'ip_version' and 'allocation_pools' fields with the current # value since _validate_subnet() expects subnet spec has 'ip_version' # and 'allocation_pools' fields. s['ip_version'] = db_subnet.ip_version s['cidr'] = db_subnet.cidr s['id'] = db_subnet.id self._validate_subnet(context, s, cur_subnet=db_subnet) if 'gateway_ip' in s and s['gateway_ip'] is not None: allocation_pools = [{'start': p['first_ip'], 'end': p['last_ip']} for p in db_subnet.allocation_pools] self._validate_gw_out_of_pools(s["gateway_ip"], allocation_pools) with context.session.begin(subtransactions=True): if "dns_nameservers" in s: changed_dns = True old_dns_list = self._get_dns_by_subnet(context, id) new_dns_addr_set = set(s["dns_nameservers"]) old_dns_addr_set = set([dns['address'] for dns in old_dns_list]) new_dns = list(new_dns_addr_set) for dns_addr in old_dns_addr_set - new_dns_addr_set: for dns in old_dns_list: if dns['address'] == dns_addr: context.session.delete(dns) for dns_addr in new_dns_addr_set - old_dns_addr_set: dns = models_v2.DNSNameServer( address=dns_addr, subnet_id=id) context.session.add(dns) del s["dns_nameservers"] def _combine(ht): return ht['destination'] + "_" + ht['nexthop'] if "host_routes" in s: changed_host_routes = True old_route_list = self._get_route_by_subnet(context, id) new_route_set = set([_combine(route) for route in s['host_routes']]) old_route_set = set([_combine(route) for route in old_route_list]) for route_str in old_route_set - new_route_set: for route in old_route_list: if _combine(route) == route_str: context.session.delete(route) for route_str in new_route_set - old_route_set: route = models_v2.SubnetRoute( destination=route_str.partition("_")[0], nexthop=route_str.partition("_")[2], subnet_id=id) context.session.add(route) # Gather host routes for result new_routes = [] for route_str in new_route_set: new_routes.append( {'destination': route_str.partition("_")[0], 'nexthop': route_str.partition("_")[2]}) del s["host_routes"] subnet = self._get_subnet(context, id) subnet.update(s) result = self._make_subnet_dict(subnet) # Keep up with fields that changed if changed_dns: result['dns_nameservers'] = new_dns if changed_host_routes: result['host_routes'] = new_routes return result
**** CubicPower OpenStack Study **** def delete_subnet(self, context, id): with context.session.begin(subtransactions=True): subnet = self._get_subnet(context, id) # Check if any tenant owned ports are using this subnet allocated = (context.session.query(models_v2.IPAllocation). filter_by(subnet_id=subnet['id']). join(models_v2.Port). filter_by(network_id=subnet['network_id']). with_lockmode('update')) # remove network owned ports for a in allocated: if a.ports.device_owner in AUTO_DELETE_PORT_OWNERS: NeutronDbPluginV2._delete_ip_allocation( context, subnet.network_id, id, a.ip_address) else: raise n_exc.SubnetInUse(subnet_id=id) context.session.delete(subnet)
**** CubicPower OpenStack Study **** def get_subnet(self, context, id, fields=None): subnet = self._get_subnet(context, id) return self._make_subnet_dict(subnet, fields)
**** CubicPower OpenStack Study **** def get_subnets(self, context, filters=None, fields=None, sorts=None, limit=None, marker=None, page_reverse=False): marker_obj = self._get_marker_obj(context, 'subnet', limit, marker) return self._get_collection(context, models_v2.Subnet, self._make_subnet_dict, filters=filters, fields=fields, sorts=sorts, limit=limit, marker_obj=marker_obj, page_reverse=page_reverse)
**** CubicPower OpenStack Study **** def get_subnets_count(self, context, filters=None): return self._get_collection_count(context, models_v2.Subnet, filters=filters)
**** CubicPower OpenStack Study **** def create_port_bulk(self, context, ports): return self._create_bulk('port', context, ports)
**** CubicPower OpenStack Study **** def create_port(self, context, port): p = port['port'] port_id = p.get('id') or uuidutils.generate_uuid() network_id = p['network_id'] mac_address = p['mac_address'] # NOTE(jkoelker) Get the tenant_id outside of the session to avoid # unneeded db action if the operation raises tenant_id = self._get_tenant_id_for_create(context, p) if p.get('device_owner') == constants.DEVICE_OWNER_ROUTER_INTF: self._enforce_device_owner_not_router_intf_or_device_id(context, p, tenant_id) with context.session.begin(subtransactions=True): network = self._get_network(context, network_id) # Ensure that a MAC address is defined and it is unique on the # network if mac_address is attributes.ATTR_NOT_SPECIFIED: mac_address = NeutronDbPluginV2._generate_mac(context, network_id) else: # Ensure that the mac on the network is unique if not NeutronDbPluginV2._check_unique_mac(context, network_id, mac_address): raise n_exc.MacAddressInUse(net_id=network_id, mac=mac_address) # Returns the IP's for the port ips = self._allocate_ips_for_port(context, network, port) if 'status' not in p: status = constants.PORT_STATUS_ACTIVE else: status = p['status'] port = models_v2.Port(tenant_id=tenant_id, name=p['name'], id=port_id, network_id=network_id, mac_address=mac_address, admin_state_up=p['admin_state_up'], status=status, device_id=p['device_id'], device_owner=p['device_owner']) context.session.add(port) # Update the allocated IP's if ips: for ip in ips: ip_address = ip['ip_address'] subnet_id = ip['subnet_id'] LOG.debug(_("Allocated IP %(ip_address)s " "(%(network_id)s/%(subnet_id)s/%(port_id)s)"), {'ip_address': ip_address, 'network_id': network_id, 'subnet_id': subnet_id, 'port_id': port_id}) allocated = models_v2.IPAllocation( network_id=network_id, port_id=port_id, ip_address=ip_address, subnet_id=subnet_id, ) context.session.add(allocated) return self._make_port_dict(port, process_extensions=False)
**** CubicPower OpenStack Study **** def update_port(self, context, id, port): p = port['port'] changed_ips = False with context.session.begin(subtransactions=True): port = self._get_port(context, id) if 'device_owner' in p: current_device_owner = p['device_owner'] changed_device_owner = True else: current_device_owner = port['device_owner'] changed_device_owner = False if p.get('device_id') != port['device_id']: changed_device_id = True # if the current device_owner is ROUTER_INF and the device_id or # device_owner changed check device_id is not another tenants # router if ((current_device_owner == constants.DEVICE_OWNER_ROUTER_INTF) and (changed_device_id or changed_device_owner)): self._enforce_device_owner_not_router_intf_or_device_id( context, p, port['tenant_id'], port) # Check if the IPs need to be updated if 'fixed_ips' in p: changed_ips = True original = self._make_port_dict(port, process_extensions=False) added_ips, prev_ips = self._update_ips_for_port( context, port["network_id"], id, original["fixed_ips"], p['fixed_ips']) # Update ips if necessary for ip in added_ips: allocated = models_v2.IPAllocation( network_id=port['network_id'], port_id=port.id, ip_address=ip['ip_address'], subnet_id=ip['subnet_id']) context.session.add(allocated) # Remove all attributes in p which are not in the port DB model # and then update the port port.update(self._filter_non_model_columns(p, models_v2.Port)) result = self._make_port_dict(port) # Keep up with fields that changed if changed_ips: result['fixed_ips'] = prev_ips + added_ips return result
**** CubicPower OpenStack Study **** def delete_port(self, context, id): with context.session.begin(subtransactions=True): self._delete_port(context, id)
**** CubicPower OpenStack Study **** def delete_ports_by_device_id(self, context, device_id, network_id=None): query = (context.session.query(models_v2.Port.id) .enable_eagerloads(False) .filter(models_v2.Port.device_id == device_id)) if network_id: query = query.filter(models_v2.Port.network_id == network_id) port_ids = [p[0] for p in query] for port_id in port_ids: try: self.delete_port(context, port_id) except n_exc.PortNotFound: # Don't raise if something else concurrently deleted the port LOG.debug(_("Ignoring PortNotFound when deleting port '%s'. " "The port has already been deleted."), port_id)
**** CubicPower OpenStack Study **** def _delete_port(self, context, id): query = (context.session.query(models_v2.Port). enable_eagerloads(False).filter_by(id=id)) if not context.is_admin: query = query.filter_by(tenant_id=context.tenant_id) query.delete()
**** CubicPower OpenStack Study **** def get_port(self, context, id, fields=None): port = self._get_port(context, id) return self._make_port_dict(port, fields)
**** CubicPower OpenStack Study **** def _get_ports_query(self, context, filters=None, sorts=None, limit=None, marker_obj=None, page_reverse=False): Port = models_v2.Port IPAllocation = models_v2.IPAllocation if not filters: filters = {} query = self._model_query(context, Port) fixed_ips = filters.pop('fixed_ips', {}) ip_addresses = fixed_ips.get('ip_address') subnet_ids = fixed_ips.get('subnet_id') if ip_addresses or subnet_ids: query = query.join(Port.fixed_ips) if ip_addresses: query = query.filter(IPAllocation.ip_address.in_(ip_addresses)) if subnet_ids: query = query.filter(IPAllocation.subnet_id.in_(subnet_ids)) query = self._apply_filters_to_query(query, Port, filters) if limit and page_reverse and sorts: sorts = [(s[0], not s[1]) for s in sorts] query = sqlalchemyutils.paginate_query(query, Port, limit, sorts, marker_obj) return query
**** CubicPower OpenStack Study **** def get_ports(self, context, filters=None, fields=None, sorts=None, limit=None, marker=None, page_reverse=False): marker_obj = self._get_marker_obj(context, 'port', limit, marker) query = self._get_ports_query(context, filters=filters, sorts=sorts, limit=limit, marker_obj=marker_obj, page_reverse=page_reverse) items = [self._make_port_dict(c, fields) for c in query] if limit and page_reverse: items.reverse() return items
**** CubicPower OpenStack Study **** def get_ports_count(self, context, filters=None): return self._get_ports_query(context, filters).count()
**** CubicPower OpenStack Study **** def _enforce_device_owner_not_router_intf_or_device_id(self, context, port_request, tenant_id, db_port=None): if not context.is_admin: # find the device_id. If the call was update_port and the # device_id was not passed in we use the device_id from the # db. device_id = port_request.get('device_id') if not device_id and db_port: device_id = db_port.get('device_id') # check to make sure device_id does not match another tenants # router. if device_id: if hasattr(self, 'get_router'): try: ctx_admin = ctx.get_admin_context() router = self.get_router(ctx_admin, device_id) except l3.RouterNotFound: return else: l3plugin = ( manager.NeutronManager.get_service_plugins().get( service_constants.L3_ROUTER_NAT)) if l3plugin: try: ctx_admin = ctx.get_admin_context() router = l3plugin.get_router(ctx_admin, device_id) except l3.RouterNotFound: return else: # raise as extension doesn't support L3 anyways. raise n_exc.DeviceIDNotOwnedByTenant( device_id=device_id) if tenant_id != router['tenant_id']: raise n_exc.DeviceIDNotOwnedByTenant(device_id=device_id)
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