250 lines
8.0 KiB
Python
250 lines
8.0 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
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# Copyright 2012, Cisco Systems, Inc.
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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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# @author: Rohit Agarwalla, Cisco Systems, Inc.
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import logging
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from sqlalchemy import func
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from sqlalchemy.orm import exc
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from quantum.common import exceptions as q_exc
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from quantum.common.config import find_config_file
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import quantum.db.api as db
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from quantum.plugins.linuxbridge.common import exceptions as c_exc
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from quantum.plugins.linuxbridge.db import l2network_models
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from quantum.plugins.linuxbridge.common import config
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LOG = logging.getLogger(__name__)
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CONF_FILE = find_config_file({'plugin': 'linuxbridge'}, None,
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"linuxbridge_conf.ini")
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CONF = config.parse(CONF_FILE)
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def initialize():
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options = {"sql_connection": "%s" % CONF.DATABASE.sql_connection}
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options.update({"reconnect_interval": CONF.DATABASE.reconnect_interval})
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db.configure_db(options)
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create_vlanids()
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def create_vlanids():
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"""Prepopulates the vlan_bindings table"""
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LOG.debug("create_vlanids() called")
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session = db.get_session()
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start = CONF.VLANS.vlan_start
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end = CONF.VLANS.vlan_end
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try:
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vlanid = session.query(l2network_models.VlanID).\
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one()
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except exc.MultipleResultsFound:
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"""
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TODO (Sumit): Salvatore rightly points out that this will not handle
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change in VLAN ID range across server reboots. This is currently not
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a supported feature. This logic will need to change if this feature
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has to be supported.
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Per Dan's suggestion we just throw a server exception for now.
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"""
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current_start = (
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int(session.query(func.min(l2network_models.VlanID.vlan_id)).
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one()[0]))
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current_end = (
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int(session.query(func.max(l2network_models.VlanID.vlan_id)).
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one()[0]))
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if current_start != start or current_end != end:
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LOG.debug("Old VLAN range %s-%s" % (current_start, current_end))
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LOG.debug("New VLAN range %s-%s" % (start, end))
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raise c_exc.UnableToChangeVlanRange(range_start=current_start,
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range_end=current_end)
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except exc.NoResultFound:
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LOG.debug("Setting VLAN range to %s-%s" % (start, end))
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while start <= end:
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vlanid = l2network_models.VlanID(start)
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session.add(vlanid)
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start += 1
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session.flush()
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return
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def get_all_vlanids():
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"""Gets all the vlanids"""
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LOG.debug("get_all_vlanids() called")
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session = db.get_session()
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try:
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vlanids = (session.query(l2network_models.VlanID).
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all())
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return vlanids
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except exc.NoResultFound:
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return []
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def is_vlanid_used(vlan_id):
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"""Checks if a vlanid is in use"""
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LOG.debug("is_vlanid_used() called")
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session = db.get_session()
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try:
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vlanid = (session.query(l2network_models.VlanID).
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filter_by(vlan_id=vlan_id).
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one())
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return vlanid["vlan_used"]
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except exc.NoResultFound:
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raise c_exc.VlanIDNotFound(vlan_id=vlan_id)
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def release_vlanid(vlan_id):
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"""Sets the vlanid state to be unused"""
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LOG.debug("release_vlanid() called")
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session = db.get_session()
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try:
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vlanid = (session.query(l2network_models.VlanID).
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filter_by(vlan_id=vlan_id).
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one())
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vlanid["vlan_used"] = False
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session.merge(vlanid)
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session.flush()
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return vlanid["vlan_used"]
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except exc.NoResultFound:
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raise c_exc.VlanIDNotFound(vlan_id=vlan_id)
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return
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def delete_vlanid(vlan_id):
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"""Deletes a vlanid entry from db"""
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LOG.debug("delete_vlanid() called")
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session = db.get_session()
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try:
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vlanid = (session.query(l2network_models.VlanID).
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filter_by(vlan_id=vlan_id).
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one())
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session.delete(vlanid)
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session.flush()
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return vlanid
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except exc.NoResultFound:
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raise c_exc.VlanIDNotFound(vlan_id=vlan_id)
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def reserve_vlanid():
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"""Reserves the first unused vlanid"""
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LOG.debug("reserve_vlanid() called")
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session = db.get_session()
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try:
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rvlan = (session.query(l2network_models.VlanID).
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first())
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if not rvlan:
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create_vlanids()
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rvlan = (session.query(l2network_models.VlanID).
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filter_by(vlan_used=False).
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first())
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if not rvlan:
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raise c_exc.VlanIDNotAvailable()
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rvlanid = (session.query(l2network_models.VlanID).
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filter_by(vlan_id=rvlan["vlan_id"]).
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one())
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rvlanid["vlan_used"] = True
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session.merge(rvlanid)
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session.flush()
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return rvlan["vlan_id"]
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except exc.NoResultFound:
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raise c_exc.VlanIDNotAvailable()
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def get_all_vlanids_used():
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"""Gets all the vlanids used"""
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LOG.debug("get_all_vlanids() called")
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session = db.get_session()
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try:
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vlanids = (session.query(l2network_models.VlanID).
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filter_by(vlan_used=True).
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all())
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return vlanids
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except exc.NoResultFound:
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return []
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def get_all_vlan_bindings():
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"""Lists all the vlan to network associations"""
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LOG.debug("get_all_vlan_bindings() called")
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session = db.get_session()
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try:
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bindings = (session.query(l2network_models.VlanBinding).
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all())
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return bindings
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except exc.NoResultFound:
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return []
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def get_vlan_binding(netid):
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"""Lists the vlan given a network_id"""
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LOG.debug("get_vlan_binding() called")
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session = db.get_session()
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try:
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binding = (session.query(l2network_models.VlanBinding).
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filter_by(network_id=netid).
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one())
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return binding
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except exc.NoResultFound:
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raise c_exc.NetworkVlanBindingNotFound(network_id=netid)
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def add_vlan_binding(vlanid, netid):
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"""Adds a vlan to network association"""
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LOG.debug("add_vlan_binding() called")
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session = db.get_session()
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try:
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binding = (session.query(l2network_models.VlanBinding).
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filter_by(vlan_id=vlanid).
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one())
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raise c_exc.NetworkVlanBindingAlreadyExists(vlan_id=vlanid,
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network_id=netid)
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except exc.NoResultFound:
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binding = l2network_models.VlanBinding(vlanid, netid)
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session.add(binding)
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session.flush()
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return binding
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def remove_vlan_binding(netid):
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"""Removes a vlan to network association"""
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LOG.debug("remove_vlan_binding() called")
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session = db.get_session()
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try:
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binding = (session.query(l2network_models.VlanBinding).
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filter_by(network_id=netid).
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one())
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session.delete(binding)
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session.flush()
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return binding
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except exc.NoResultFound:
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pass
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def update_vlan_binding(netid, newvlanid=None):
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"""Updates a vlan to network association"""
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LOG.debug("update_vlan_binding() called")
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session = db.get_session()
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try:
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binding = (session.query(l2network_models.VlanBinding).
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filter_by(network_id=netid).
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one())
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if newvlanid:
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binding["vlan_id"] = newvlanid
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session.merge(binding)
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session.flush()
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return binding
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except exc.NoResultFound:
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raise q_exc.NetworkNotFound(net_id=netid)
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