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virt-manager/virtinst/interface.py

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#
# Copyright 2009, 2013 Red Hat, Inc.
# Cole Robinson <crobinso@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301 USA.
"""
Classes for building and installing libvirt interface xml
"""
import logging
import libvirt
import ipaddr
from . import util
from .xmlbuilder import XMLBuilder, XMLChildProperty, XMLProperty
class _IPAddress(XMLBuilder):
_XML_PROP_ORDER = ["address", "prefix"]
_XML_ROOT_NAME = "ip"
######################
# Validation helpers #
######################
def _validate_ipaddr(self, addr):
ipaddr.IPAddress(addr)
return addr
address = XMLProperty("./@address", validate_cb=_validate_ipaddr)
prefix = XMLProperty("./@prefix", is_int=True)
class InterfaceProtocol(XMLBuilder):
INTERFACE_PROTOCOL_FAMILY_IPV4 = "ipv4"
INTERFACE_PROTOCOL_FAMILY_IPV6 = "ipv6"
INTERFACE_PROTOCOL_FAMILIES = [INTERFACE_PROTOCOL_FAMILY_IPV4,
INTERFACE_PROTOCOL_FAMILY_IPV6]
_XML_ROOT_NAME = "protocol"
_XML_PROP_ORDER = ["autoconf", "dhcp", "dhcp_peerdns", "ips", "gateway"]
family = XMLProperty("./@family")
dhcp = XMLProperty("./dhcp", is_bool=True, doc=_("Whether to enable DHCP"))
dhcp_peerdns = XMLProperty("./dhcp/@peerdns", is_yesno=True)
gateway = XMLProperty("./route/@gateway", doc=_("Network gateway address"))
autoconf = XMLProperty("./autoconf", is_bool=True,
doc=_("Whether to enable IPv6 autoconfiguration"))
#####################
# IP child handling #
#####################
def add_ip(self, addr, prefix=None):
ip = _IPAddress(self.conn)
ip.address = addr
ip.prefix = prefix
self._add_child(ip)
def remove_ip(self, ip):
self._remove_child(ip)
ip.clear()
ips = XMLChildProperty(_IPAddress)
class Interface(XMLBuilder):
"""
Base class for building any libvirt interface object.
Mostly meaningless to directly instantiate.
"""
INTERFACE_TYPE_BRIDGE = "bridge"
INTERFACE_TYPE_BOND = "bond"
INTERFACE_TYPE_ETHERNET = "ethernet"
INTERFACE_TYPE_VLAN = "vlan"
INTERFACE_TYPES = [INTERFACE_TYPE_BRIDGE, INTERFACE_TYPE_BOND,
INTERFACE_TYPE_ETHERNET, INTERFACE_TYPE_VLAN]
INTERFACE_START_MODE_NONE = "none"
INTERFACE_START_MODE_ONBOOT = "onboot"
INTERFACE_START_MODE_HOTPLUG = "hotplug"
INTERFACE_START_MODES = [INTERFACE_START_MODE_NONE,
INTERFACE_START_MODE_ONBOOT,
INTERFACE_START_MODE_HOTPLUG]
INTERFACE_BOND_MODES = ["active-backup", "balance-alb", "balance-rr",
"balance-tlb", "balance-xor", "broadcast",
"802.3ad"]
INTERFACE_BOND_MONITOR_MODE_ARP = "arpmon"
INTERFACE_BOND_MONITOR_MODE_MII = "miimon"
INTERFACE_BOND_MONITOR_MODES = [INTERFACE_BOND_MONITOR_MODE_ARP,
INTERFACE_BOND_MONITOR_MODE_MII]
INTERFACE_BOND_MONITOR_MODE_ARP_VALIDATE_MODES = ["active", "backup",
"all"]
INTERFACE_BOND_MONITOR_MODE_MII_CARRIER_TYPES = ["netif", "ioctl"]
@staticmethod
def find_free_name(conn, prefix):
"""
Generate an unused interface name based on prefix. For example,
if prefix="br", we find the first unused name such as "br0", "br1",
etc.
"""
return util.generate_name(prefix, conn.interfaceLookupByName, sep="",
force_num=True)
_XML_ROOT_NAME = "interface"
_XML_PROP_ORDER = ["type", "name", "start_mode", "macaddr", "mtu",
"stp", "delay", "bond_mode", "arp_interval",
"arp_target", "arp_validate_mode", "mii_frequency",
"mii_downdelay", "mii_updelay", "mii_carrier_mode",
"tag", "parent_interface",
"protocols", "interfaces"]
##################
# Child handling #
##################
def add_interface(self, obj):
self._add_child(obj)
def remove_interface(self, obj):
self._remove_child(obj)
# 'interfaces' property is added outside this class, since it needs
# to reference the completed Interface class
def add_protocol(self, obj):
self._add_child(obj)
def remove_protocol(self, obj):
self._remove_child(obj)
protocols = XMLChildProperty(InterfaceProtocol)
######################
# Validation helpers #
######################
def _validate_name(self, name):
if name == self.name:
return
try:
self.conn.interfaceLookupByName(name)
except libvirt.libvirtError:
return
raise ValueError(_("Name '%s' already in use by another interface.") %
name)
def _validate_mac(self, val):
util.validate_macaddr(val)
return val
##################
# General params #
##################
type = XMLProperty("./@type")
mtu = XMLProperty("./mtu/@size", is_int=True,
doc=_("Maximum transmit size in bytes"))
start_mode = XMLProperty("./start/@mode",
doc=_("When the interface will be auto-started."))
name = XMLProperty("./@name", validate_cb=_validate_name,
doc=_("Name for the interface object."))
macaddr = XMLProperty("./mac/@address", validate_cb=_validate_mac,
doc=_("Interface MAC address"))
#################
# Bridge params #
#################
stp = XMLProperty("./bridge/@stp", is_onoff=True,
doc=_("Whether STP is enabled on the bridge"))
delay = XMLProperty("./bridge/@delay",
doc=_("Delay in seconds before forwarding begins when "
"joining a network."))
###############
# Bond params #
###############
bond_mode = XMLProperty("./bond/@mode",
doc=_("Mode of operation of the bonding device"))
arp_interval = XMLProperty("./bond/arpmon/@interval", is_int=True,
doc=_("ARP monitoring interval in "
"milliseconds"))
arp_target = XMLProperty("./bond/arpmon/@target",
doc=_("IP target used in ARP monitoring packets"))
arp_validate_mode = XMLProperty("./bond/arpmon/@validate",
doc=_("ARP monitor validation mode"))
mii_carrier_mode = XMLProperty("./bond/miimon/@carrier",
doc=_("MII monitoring method."))
mii_frequency = XMLProperty("./bond/miimon/@freq", is_int=True,
doc=_("MII monitoring interval in "
"milliseconds"))
mii_updelay = XMLProperty("./bond/miimon/@updelay", is_int=True,
doc=_("Time in milliseconds to wait before "
"enabling a slave after link recovery "))
mii_downdelay = XMLProperty("./bond/miimon/@downdelay", is_int=True,
doc=_("Time in milliseconds to wait before "
"disabling a slave after link failure"))
###############
# VLAN params #
###############
tag = XMLProperty("./vlan/@tag", is_int=True,
doc=_("VLAN device tag number"))
parent_interface = XMLProperty("./vlan/interface/@name",
doc=_("Parent interface to create VLAN on"))
##################
# Build routines #
##################
def validate(self):
if (self.type == self.INTERFACE_TYPE_VLAN and
(self.tag is None or self.parent_interface is None)):
raise ValueError(_("VLAN Tag and parent interface are required."))
def install(self, meter=None, create=True):
"""
Install network interface xml.
"""
xml = self.get_xml_config()
logging.debug("Creating interface '%s' with xml:\n%s",
self.name, xml)
try:
iface = self.conn.interfaceDefineXML(xml, 0)
except Exception, e:
raise RuntimeError(_("Could not define interface: %s" % str(e)))
errmsg = None
if create and not errmsg:
try:
iface.create(0)
except Exception, e:
errmsg = _("Could not create interface: %s" % str(e))
if errmsg:
# Try and clean up the leftover pool
try:
iface.undefine()
except Exception, e:
logging.debug("Error cleaning up interface after failure: " +
"%s" % str(e))
raise RuntimeError(errmsg)
return iface
Interface.interfaces = XMLChildProperty(Interface,
relative_xpath="./%(type)s")
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