1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
# 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
def set_vif_guest_frontend_config(conf, mac, model, driver, queues,
rx_queue_size):
"""Populate a LibvirtConfigGuestInterface instance
with guest frontend details.
NOTE: @model, @driver, @queues and @rx_queue_size can be None.
"""
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
if rx_queue_size:
conf.vhost_rx_queue_size = rx_queue_size
def set_vif_host_backend_ethernet_config(conf, tapname):
"""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
conf.script = None
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, rx_queue_size,
tx_queue_size, tapname=None):
"""Populate a LibvirtConfigGuestInterface instance
with host backend details for vhostuser socket.
NOTE: @rx_queue_size and @tx_queue_size can be None
"""
conf.net_type = "vhostuser"
conf.vhostuser_type = "unix"
conf.vhostuser_mode = mode
conf.vhostuser_path = path
if rx_queue_size:
conf.vhost_rx_queue_size = rx_queue_size
if tx_queue_size:
conf.vhost_tx_queue_size = tx_queue_size
if tapname:
conf.target_dev = tapname
def set_vif_host_backend_vdpa_config(
conf, dev_path, rx_queue_size=None, tx_queue_size=None,
):
"""Populate a LibvirtConfigGuestInterface instance
with host backend details for a vdpa device.
NOTE: @rx_queue_size and @tx_queue_size can be None
"""
conf.net_type = "vdpa"
conf.source_dev = dev_path
if rx_queue_size:
conf.vhost_rx_queue_size = rx_queue_size
if tx_queue_size:
conf.vhost_tx_queue_size = tx_queue_size
def set_vif_mtu_config(conf, mtu):
"""Populate a LibvirtConfigGuestInterface instance
with network mtu.
"""
conf.mtu = mtu
def set_vif_bandwidth_config(conf, flavor):
"""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 flavor.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)
def set_numa_memnode(conf, guest_node_id, host_cell_id):
"""Prepares numa memory node config for the guest.
"""
conf.cellid = guest_node_id
conf.nodeset = [host_cell_id]
conf.mode = "strict"
def set_vcpu_realtime_scheduler(conf, vcpus_rt, priority):
"""Prepares realtime config for the guest."""
conf.vcpus = vcpus_rt
conf.scheduler = "fifo"
conf.priority = priority
def set_driver_iommu_for_device(dev):
if dev.uses_virtio:
dev.driver_iommu = True
def set_driver_iommu_for_all_devices(conf):
for dev in conf.devices:
set_driver_iommu_for_device(dev)
|
