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# vim: tabstop=4 shiftwidth=4 softtabstop=4
# Copyright 2011 Nicira Networks, Inc.
# 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.
# @author: Aaron Rosen, Nicira Networks, Inc.
# @author: Bob Kukura, Red Hat, Inc.
from sqlalchemy import func
from sqlalchemy.orm import exc
from neutron.common import exceptions as q_exc
import neutron.db.api as db
from neutron.db import models_v2
from neutron.db import securitygroups_db as sg_db
from neutron.extensions import securitygroup as ext_sg
from neutron import manager
from neutron.openstack.common.db import exception as db_exc
from neutron.openstack.common import log as logging
from neutron.plugins.openvswitch.common import constants
from neutron.plugins.openvswitch import ovs_models_v2
LOG = logging.getLogger(__name__)
def initialize():
db.configure_db()
def get_network_binding(session, network_id):
session = session or db.get_session()
try:
binding = (session.query(ovs_models_v2.NetworkBinding).
filter_by(network_id=network_id).
one())
return binding
except exc.NoResultFound:
return
def add_network_binding(session, network_id, network_type,
physical_network, segmentation_id):
with session.begin(subtransactions=True):
binding = ovs_models_v2.NetworkBinding(network_id, network_type,
physical_network,
segmentation_id)
session.add(binding)
def get_port_forwarding(session, port_id):
session = session or db.get_session()
try:
forward = (session.query(ovs_models_v2.PortForwarding).
filter_by(port_id=port_id).one())
return forward['forward_ports']
except exc.NoResultFound:
return
def clear_port_forwarding(session, port_id):
with session.begin(subtransactions=True):
try:
# Get rid of old port bindings
forward = (session.query(ovs_models_v2.PortForwarding).
filter_by(port_id=port_id).one())
if forward:
session.delete(forward)
except exc.NoResultFound:
pass
def add_port_forwarding(session, port_id, forward_ports):
with session.begin(subtransactions=True):
forward = ovs_models_v2.PortForwarding(port_id, forward_ports)
session.add(forward)
def sync_vlan_allocations(network_vlan_ranges):
"""Synchronize vlan_allocations table with configured VLAN ranges."""
session = db.get_session()
with session.begin():
# get existing allocations for all physical networks
allocations = dict()
allocs = (session.query(ovs_models_v2.VlanAllocation).
all())
for alloc in allocs:
if alloc.physical_network not in allocations:
allocations[alloc.physical_network] = set()
allocations[alloc.physical_network].add(alloc)
# process vlan ranges for each configured physical network
for physical_network, vlan_ranges in network_vlan_ranges.iteritems():
# determine current configured allocatable vlans for this
# physical network
vlan_ids = set()
for vlan_range in vlan_ranges:
vlan_ids |= set(xrange(vlan_range[0], vlan_range[1] + 1))
# remove from table unallocated vlans not currently allocatable
if physical_network in allocations:
for alloc in allocations[physical_network]:
try:
# see if vlan is allocatable
vlan_ids.remove(alloc.vlan_id)
except KeyError:
# it's not allocatable, so check if its allocated
if not alloc.allocated:
# it's not, so remove it from table
LOG.debug(_("Removing vlan %(vlan_id)s on "
"physical network "
"%(physical_network)s from pool"),
{'vlan_id': alloc.vlan_id,
'physical_network': physical_network})
session.delete(alloc)
del allocations[physical_network]
# add missing allocatable vlans to table
for vlan_id in sorted(vlan_ids):
alloc = ovs_models_v2.VlanAllocation(physical_network, vlan_id)
session.add(alloc)
# remove from table unallocated vlans for any unconfigured physical
# networks
for allocs in allocations.itervalues():
for alloc in allocs:
if not alloc.allocated:
LOG.debug(_("Removing vlan %(vlan_id)s on physical "
"network %(physical_network)s from pool"),
{'vlan_id': alloc.vlan_id,
'physical_network': alloc.physical_network})
session.delete(alloc)
def get_vlan_allocation(physical_network, vlan_id):
session = db.get_session()
try:
alloc = (session.query(ovs_models_v2.VlanAllocation).
filter_by(physical_network=physical_network,
vlan_id=vlan_id).
one())
return alloc
except exc.NoResultFound:
return
def reserve_vlan(session):
with session.begin(subtransactions=True):
alloc = (session.query(ovs_models_v2.VlanAllocation).
filter_by(allocated=False).
with_lockmode('update').
first())
if alloc:
LOG.debug(_("Reserving vlan %(vlan_id)s on physical network "
"%(physical_network)s from pool"),
{'vlan_id': alloc.vlan_id,
'physical_network': alloc.physical_network})
alloc.allocated = True
return (alloc.physical_network, alloc.vlan_id)
raise q_exc.NoNetworkAvailable()
def reserve_specific_vlan(session, physical_network, vlan_id):
with session.begin(subtransactions=True):
try:
alloc = (session.query(ovs_models_v2.VlanAllocation).
filter_by(physical_network=physical_network,
vlan_id=vlan_id).
with_lockmode('update').
one())
if alloc.allocated:
if vlan_id == constants.FLAT_VLAN_ID:
raise q_exc.FlatNetworkInUse(
physical_network=physical_network)
else:
raise q_exc.VlanIdInUse(vlan_id=vlan_id,
physical_network=physical_network)
LOG.debug(_("Reserving specific vlan %(vlan_id)s on physical "
"network %(physical_network)s from pool"),
{'vlan_id': vlan_id,
'physical_network': physical_network})
alloc.allocated = True
except exc.NoResultFound:
LOG.debug(_("Reserving specific vlan %(vlan_id)s on physical "
"network %(physical_network)s outside pool"),
{'vlan_id': vlan_id,
'physical_network': physical_network})
alloc = ovs_models_v2.VlanAllocation(physical_network, vlan_id)
alloc.allocated = True
session.add(alloc)
def release_vlan(session, physical_network, vlan_id, network_vlan_ranges):
with session.begin(subtransactions=True):
try:
alloc = (session.query(ovs_models_v2.VlanAllocation).
filter_by(physical_network=physical_network,
vlan_id=vlan_id).
with_lockmode('update').
one())
alloc.allocated = False
inside = False
for vlan_range in network_vlan_ranges.get(physical_network, []):
if vlan_id >= vlan_range[0] and vlan_id <= vlan_range[1]:
inside = True
break
if not inside:
session.delete(alloc)
LOG.debug(_("Releasing vlan %(vlan_id)s on physical network "
"%(physical_network)s outside pool"),
{'vlan_id': vlan_id,
'physical_network': physical_network})
else:
LOG.debug(_("Releasing vlan %(vlan_id)s on physical network "
"%(physical_network)s to pool"),
{'vlan_id': vlan_id,
'physical_network': physical_network})
except exc.NoResultFound:
LOG.warning(_("vlan_id %(vlan_id)s on physical network "
"%(physical_network)s not found"),
{'vlan_id': vlan_id,
'physical_network': physical_network})
def sync_tunnel_allocations(tunnel_id_ranges):
"""Synchronize tunnel_allocations table with configured tunnel ranges."""
# determine current configured allocatable tunnels
tunnel_ids = set()
for tunnel_id_range in tunnel_id_ranges:
tun_min, tun_max = tunnel_id_range
if tun_max + 1 - tun_min > 1000000:
LOG.error(_("Skipping unreasonable tunnel ID range "
"%(tun_min)s:%(tun_max)s"),
{'tun_min': tun_min, 'tun_max': tun_max})
else:
tunnel_ids |= set(xrange(tun_min, tun_max + 1))
session = db.get_session()
with session.begin():
# remove from table unallocated tunnels not currently allocatable
allocs = (session.query(ovs_models_v2.TunnelAllocation).
all())
for alloc in allocs:
try:
# see if tunnel is allocatable
tunnel_ids.remove(alloc.tunnel_id)
except KeyError:
# it's not allocatable, so check if its allocated
if not alloc.allocated:
# it's not, so remove it from table
LOG.debug(_("Removing tunnel %s from pool"),
alloc.tunnel_id)
session.delete(alloc)
# add missing allocatable tunnels to table
for tunnel_id in sorted(tunnel_ids):
alloc = ovs_models_v2.TunnelAllocation(tunnel_id)
session.add(alloc)
def get_tunnel_allocation(tunnel_id):
session = db.get_session()
try:
alloc = (session.query(ovs_models_v2.TunnelAllocation).
filter_by(tunnel_id=tunnel_id).
with_lockmode('update').
one())
return alloc
except exc.NoResultFound:
return
def reserve_tunnel(session):
with session.begin(subtransactions=True):
alloc = (session.query(ovs_models_v2.TunnelAllocation).
filter_by(allocated=False).
with_lockmode('update').
first())
if alloc:
LOG.debug(_("Reserving tunnel %s from pool"), alloc.tunnel_id)
alloc.allocated = True
return alloc.tunnel_id
raise q_exc.NoNetworkAvailable()
def reserve_specific_tunnel(session, tunnel_id):
with session.begin(subtransactions=True):
try:
alloc = (session.query(ovs_models_v2.TunnelAllocation).
filter_by(tunnel_id=tunnel_id).
with_lockmode('update').
one())
if alloc.allocated:
raise q_exc.TunnelIdInUse(tunnel_id=tunnel_id)
LOG.debug(_("Reserving specific tunnel %s from pool"), tunnel_id)
alloc.allocated = True
except exc.NoResultFound:
LOG.debug(_("Reserving specific tunnel %s outside pool"),
tunnel_id)
alloc = ovs_models_v2.TunnelAllocation(tunnel_id)
alloc.allocated = True
session.add(alloc)
def release_tunnel(session, tunnel_id, tunnel_id_ranges):
with session.begin(subtransactions=True):
try:
alloc = (session.query(ovs_models_v2.TunnelAllocation).
filter_by(tunnel_id=tunnel_id).
with_lockmode('update').
one())
alloc.allocated = False
inside = False
for tunnel_id_range in tunnel_id_ranges:
if (tunnel_id >= tunnel_id_range[0]
and tunnel_id <= tunnel_id_range[1]):
inside = True
break
if not inside:
session.delete(alloc)
LOG.debug(_("Releasing tunnel %s outside pool"), tunnel_id)
else:
LOG.debug(_("Releasing tunnel %s to pool"), tunnel_id)
except exc.NoResultFound:
LOG.warning(_("tunnel_id %s not found"), tunnel_id)
def get_port(port_id):
session = db.get_session()
try:
port = session.query(models_v2.Port).filter_by(id=port_id).one()
except exc.NoResultFound:
port = None
return port
def get_port_from_device(port_id):
"""Get port from database."""
LOG.debug(_("get_port_with_securitygroups() called:port_id=%s"), port_id)
session = db.get_session()
sg_binding_port = sg_db.SecurityGroupPortBinding.port_id
query = session.query(models_v2.Port,
sg_db.SecurityGroupPortBinding.security_group_id)
query = query.outerjoin(sg_db.SecurityGroupPortBinding,
models_v2.Port.id == sg_binding_port)
query = query.filter(models_v2.Port.id == port_id)
port_and_sgs = query.all()
if not port_and_sgs:
return None
port = port_and_sgs[0][0]
plugin = manager.NeutronManager.get_plugin()
port_dict = plugin._make_port_dict(port)
port_dict[ext_sg.SECURITYGROUPS] = [
sg_id for port_, sg_id in port_and_sgs if sg_id]
port_dict['security_group_rules'] = []
port_dict['security_group_source_groups'] = []
port_dict['fixed_ips'] = [ip['ip_address']
for ip in port['fixed_ips']]
return port_dict
def set_port_status(port_id, status):
session = db.get_session()
try:
port = session.query(models_v2.Port).filter_by(id=port_id).one()
port['status'] = status
session.merge(port)
session.flush()
except exc.NoResultFound:
raise q_exc.PortNotFound(port_id=port_id)
def get_tunnel_endpoints():
session = db.get_session()
tunnels = session.query(ovs_models_v2.TunnelEndpoint)
return [{'id': tunnel.id,
'ip_address': tunnel.ip_address} for tunnel in tunnels]
def _generate_tunnel_id(session):
max_tunnel_id = session.query(
func.max(ovs_models_v2.TunnelEndpoint.id)).scalar() or 0
return max_tunnel_id + 1
def add_tunnel_endpoint(ip, max_retries=10):
"""Return the endpoint of the given IP address or generate a new one."""
# NOTE(rpodolyaka): generation of a new tunnel endpoint must be put into a
# repeatedly executed transactional block to ensure it
# doesn't conflict with any other concurrently executed
# DB transactions in spite of the specified transactions
# isolation level value
for i in xrange(max_retries):
LOG.debug(_('Adding a tunnel endpoint for %s'), ip)
try:
session = db.get_session()
with session.begin(subtransactions=True):
tunnel = (session.query(ovs_models_v2.TunnelEndpoint).
filter_by(ip_address=ip).with_lockmode('update').
first())
if tunnel is None:
tunnel_id = _generate_tunnel_id(session)
tunnel = ovs_models_v2.TunnelEndpoint(ip, tunnel_id)
session.add(tunnel)
return tunnel
except db_exc.DBDuplicateEntry:
# a concurrent transaction has been commited, try again
LOG.debug(_('Adding a tunnel endpoint failed due to a concurrent'
'transaction had been commited (%s attempts left)'),
max_retries - (i + 1))
raise q_exc.NeutronException(
message=_('Unable to generate a new tunnel id'))