194 lines
7.9 KiB
Python
194 lines
7.9 KiB
Python
# 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 sys
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from oslo_log import log as logging
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from vif_plug_ovs import constants
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from vif_plug_ovs import linux_net
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from vif_plug_ovs.ovsdb import api as ovsdb_api
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LOG = logging.getLogger(__name__)
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class BaseOVS(object):
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def __init__(self, config):
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self.timeout = config.ovs_vsctl_timeout
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self.connection = config.ovsdb_connection
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self.interface = config.ovsdb_interface
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self._ovsdb = None
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# NOTE(sean-k-mooney): when using the native ovsdb bindings
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# creating an instance of the ovsdb api connects to the ovsdb
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# to initialize the library based on the schema version
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# of the ovsdb. To avoid that we lazy load the ovsdb
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# instance the first time we need it via a property.
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@property
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def ovsdb(self):
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if not self._ovsdb:
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self._ovsdb = ovsdb_api.get_instance(self)
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return self._ovsdb
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def _ovs_supports_mtu_requests(self):
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return self.ovsdb.has_table_column('Interface', 'mtu_request')
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def _set_mtu_request(self, dev, mtu):
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self.ovsdb.db_set('Interface', dev, ('mtu_request', mtu)).execute()
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def update_device_mtu(self, dev, mtu, interface_type=None):
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if not mtu:
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return
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if interface_type not in [
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constants.OVS_VHOSTUSER_INTERFACE_TYPE,
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constants.OVS_VHOSTUSER_CLIENT_INTERFACE_TYPE]:
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if sys.platform != constants.PLATFORM_WIN32:
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# Hyper-V with OVS does not support external programming of
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# virtual interface MTUs via netsh or other Windows tools.
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# When plugging an interface on Windows, we therefore skip
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# programming the MTU and fallback to DHCP advertisement.
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linux_net.set_device_mtu(dev, mtu)
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elif self._ovs_supports_mtu_requests():
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self._set_mtu_request(dev, mtu)
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else:
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LOG.debug("MTU not set on %(interface_name)s interface "
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"of type %(interface_type)s.",
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{'interface_name': dev,
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'interface_type': interface_type})
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def ensure_ovs_bridge(self, bridge, datapath_type):
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return self.ovsdb.add_br(bridge, may_exist=True,
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datapath_type=datapath_type).execute()
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def delete_ovs_bridge(self, bridge):
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"""Delete ovs bridge by name
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:param bridge: bridge name as a string
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.. note:: Do Not call with br-int !!!
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"""
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# TODO(sean-k-mooney): when we fix bug: #1914886
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# add a guard against deleting the integration bridge
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# after adding a config option to store its name.
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return self.ovsdb.del_br(bridge).execute()
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def create_patch_port_pair(
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self, port_bridge, port_bridge_port, int_bridge, int_bridge_port,
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iface_id, mac, instance_id, tag=None
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):
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"""Create a patch port pair between any two bridges.
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:param port_bridge: the source bridge name for the patch port pair.
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:param port_bridge_port: the name of the patch port on the
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source bridge.
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:param int_bridge: the target bridge name, typically br-int.
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:param int_bridge_port: the name of the patch port on the
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target bridge.
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:param iface_id: neutron port ID.
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:param mac: port MAC.
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:param instance_id: instance uuid.
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:param mtu: port MTU.
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:param tag: OVS interface tag used for vlan isolation.
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"""
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# NOTE(sean-k-mooney): we use a transaction here for 2 reasons:
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# 1.) if using the vsctl client its faster
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# 2.) in all cases we either want to fully create the patch port
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# pair or not create it atomically. By using a transaction we know
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# that we will never be in a mixed state where it was partly created.
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with self.ovsdb.transaction() as txn:
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# create integration bridge patch peer
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external_ids = {
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'iface-id': iface_id, 'iface-status': 'active',
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'attached-mac': mac, 'vm-uuid': instance_id
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}
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col_values = [
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('external_ids', external_ids),
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('type', 'patch'),
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('options', {'peer': port_bridge_port})
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]
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txn.add(self.ovsdb.add_port(int_bridge, int_bridge_port))
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if tag:
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txn.add(
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self.ovsdb.db_set('Port', int_bridge_port, ('tag', tag)))
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txn.add(
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self.ovsdb.db_set('Interface', int_bridge_port, *col_values))
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# create port bridge patch peer
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col_values = [
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('type', 'patch'),
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('options', {'peer': int_bridge_port})
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]
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txn.add(self.ovsdb.add_port(port_bridge, port_bridge_port))
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txn.add(
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self.ovsdb.db_set('Interface', port_bridge_port, *col_values))
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def create_ovs_vif_port(
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self, bridge, dev, iface_id, mac, instance_id,
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mtu=None, interface_type=None, vhost_server_path=None,
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tag=None, pf_pci=None, vf_num=None, set_ids=True
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):
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"""Create OVS port
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:param bridge: bridge name to create the port on.
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:param dev: port name.
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:param iface_id: port ID.
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:param mac: port MAC.
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:param instance_id: VM ID on which the port is attached to.
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:param mtu: port MTU.
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:param interface_type: OVS interface type.
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:param vhost_server_path: path to socket file of vhost server.
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:param tag: OVS interface tag.
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:param pf_pci: PCI address of PF for dpdk representor port.
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:param vf_num: VF number of PF for dpdk representor port.
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:param set_ids: set external ids on port (bool).
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.. note:: create DPDK representor port by setting all three values:
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`interface_type`, `pf_pci` and `vf_num`. if interface type is
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not `OVS_DPDK_INTERFACE_TYPE` then `pf_pci` and `vf_num` values
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are ignored.
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"""
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external_ids = {'iface-id': iface_id,
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'iface-status': 'active',
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'attached-mac': mac,
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'vm-uuid': instance_id}
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col_values = [('external_ids', external_ids)] if set_ids else []
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if interface_type:
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col_values.append(('type', interface_type))
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if vhost_server_path:
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col_values.append(('options',
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{'vhost-server-path': vhost_server_path}))
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if (interface_type == constants.OVS_DPDK_INTERFACE_TYPE and
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pf_pci and vf_num):
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devargs_string = "{PF_PCI},representor=[{VF_NUM}]".format(
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PF_PCI=pf_pci, VF_NUM=vf_num)
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col_values.append(('options',
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{'dpdk-devargs': devargs_string}))
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with self.ovsdb.transaction() as txn:
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txn.add(self.ovsdb.add_port(bridge, dev))
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if tag:
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txn.add(self.ovsdb.db_set('Port', dev, ('tag', tag)))
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if col_values:
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txn.add(self.ovsdb.db_set('Interface', dev, *col_values))
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self.update_device_mtu(dev, mtu, interface_type=interface_type)
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def update_ovs_vif_port(self, dev, mtu=None, interface_type=None):
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self.update_device_mtu(dev, mtu, interface_type=interface_type)
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def delete_ovs_vif_port(self, bridge, dev, delete_netdev=True):
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self.ovsdb.del_port(dev, bridge=bridge, if_exists=True).execute()
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if delete_netdev:
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linux_net.delete_net_dev(dev)
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