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virt-manager/virtinst/interface.py
Cole Robinson 3db5cb5f06 Use XMLBuilder for Interface XML 
So we unify parsing and building the XML.

Since we already do this for vmmDomain, take the opportunity to move
the shared infrastructure into vmmLibvirtObject
2013-09-19 16:56:38 -04:00

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#
# Copyright 2009 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
from virtinst import util
from virtinst.xmlbuilder import XMLBuilder, XMLChildProperty, XMLProperty
class _IPAddress(XMLBuilder):
_XML_PROP_ORDER = ["address", "prefix"]
_XML_ROOT_NAME = "ip"
address = XMLProperty("./@address")
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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