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# Copyright (C) 2013 Red Hat, Inc.
#
# 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.
"""
Policy based configuration of libvirt objects
This module provides helper APIs for populating the config.py
classes based on common operational needs / policies
"""
from nova.pci import utils as pci_utils
MIN_LIBVIRT_ETHERNET_SCRIPT_PATH_NONE = (1, 3, 3)
def set_vif_guest_frontend_config(conf, mac, model, driver, queues=None):
"""Populate a LibvirtConfigGuestInterface instance
with guest frontend details.
"""
conf.mac_addr = mac
if model is not None:
conf.model = model
if driver is not None:
conf.driver_name = driver
if queues is not None:
conf.vhost_queues = queues
def set_vif_host_backend_bridge_config(conf, brname, tapname=None):
"""Populate a LibvirtConfigGuestInterface instance
with host backend details for a software bridge.
"""
conf.net_type = "bridge"
conf.source_dev = brname
if tapname:
conf.target_dev = tapname
def set_vif_host_backend_ethernet_config(conf, tapname, host):
"""Populate a LibvirtConfigGuestInterface instance
with host backend details for an externally configured
host device.
NB use of this configuration is discouraged by
libvirt project and will mark domains as 'tainted'.
"""
conf.net_type = "ethernet"
conf.target_dev = tapname
# NOTE(mriedem): Before libvirt 1.3.3, passing script=None results
# in errors because /etc/qemu-ifup gets run which is blocked by
# AppArmor. Passing script='' between libvirt 1.3.3 and 3.1 will also
# result in errors. So we have to check the libvirt version and set
# the script value accordingly. Libvirt 3.1 allows and properly handles
# both None and '' as no-ops.
if host.has_min_version(MIN_LIBVIRT_ETHERNET_SCRIPT_PATH_NONE):
conf.script = None
else:
conf.script = ''
def set_vif_host_backend_802qbg_config(conf, devname, managerid,
typeid, typeidversion,
instanceid, tapname=None):
"""Populate a LibvirtConfigGuestInterface instance
with host backend details for an 802.1qbg device.
"""
conf.net_type = "direct"
conf.source_dev = devname
conf.source_mode = "vepa"
conf.vporttype = "802.1Qbg"
conf.add_vport_param("managerid", managerid)
conf.add_vport_param("typeid", typeid)
conf.add_vport_param("typeidversion", typeidversion)
conf.add_vport_param("instanceid", instanceid)
if tapname:
conf.target_dev = tapname
def set_vif_host_backend_802qbh_config(conf, net_type, devname, profileid,
tapname=None):
"""Populate a LibvirtConfigGuestInterface instance
with host backend details for an 802.1qbh device.
"""
conf.net_type = net_type
if net_type == 'direct':
conf.source_mode = 'passthrough'
conf.source_dev = pci_utils.get_ifname_by_pci_address(devname)
conf.driver_name = 'vhost'
else:
conf.source_dev = devname
conf.model = None
conf.vporttype = "802.1Qbh"
conf.add_vport_param("profileid", profileid)
if tapname:
conf.target_dev = tapname
def set_vif_host_backend_hw_veb(conf, net_type, devname, vlan,
tapname=None):
"""Populate a LibvirtConfigGuestInterface instance
with host backend details for an device that supports hardware
virtual ethernet bridge.
"""
conf.net_type = net_type
conf.vlan = vlan
if net_type == 'direct':
conf.source_mode = 'passthrough'
conf.source_dev = pci_utils.get_ifname_by_pci_address(devname)
conf.driver_name = 'vhost'
else: # net_type == network_model.VNIC_TYPE_DIRECT
conf.source_dev = devname
conf.model = None
if tapname:
conf.target_dev = tapname
def set_vif_host_backend_hostdev_pci_config(conf, pci_slot):
"""Populate a LibvirtConfigGuestHostdev instance with pci address data."""
conf.domain, conf.bus, conf.slot, conf.function = (
pci_utils.get_pci_address_fields(pci_slot))
def set_vif_host_backend_direct_config(conf, devname, mode="passthrough"):
"""Populate a LibvirtConfigGuestInterface instance
with direct Interface.
"""
conf.net_type = "direct"
conf.source_mode = mode
conf.source_dev = devname
conf.model = "virtio"
def set_vif_host_backend_vhostuser_config(conf, mode, path):
"""Populate a LibvirtConfigGuestInterface instance
with host backend details for vhostuser socket.
"""
conf.net_type = "vhostuser"
conf.vhostuser_type = "unix"
conf.vhostuser_mode = mode
conf.vhostuser_path = path
def set_vif_mtu_config(conf, mtu):
"""Populate a LibvirtConfigGuestInterface instance
with network mtu.
"""
conf.mtu = mtu
def set_vif_bandwidth_config(conf, inst_type):
"""Config vif inbound/outbound bandwidth limit. parameters are
set in instance_type_extra_specs table, key is in the format
quota:vif_inbound_average.
"""
bandwidth_items = ['vif_inbound_average', 'vif_inbound_peak',
'vif_inbound_burst', 'vif_outbound_average', 'vif_outbound_peak',
'vif_outbound_burst']
for key, value in inst_type.get('extra_specs', {}).items():
scope = key.split(':')
if len(scope) > 1 and scope[0] == 'quota':
if scope[1] in bandwidth_items:
setattr(conf, scope[1], value)
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