Current File : //proc/self/root/usr/share/virt-manager/virtinst/deviceinterface.py
#
# Copyright 2006-2009, 2013 Red Hat, Inc.
# Jeremy Katz <katzj@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.
import logging
import os
import random
from . import util
from .device import VirtualDevice
from .xmlbuilder import XMLBuilder, XMLChildProperty, XMLProperty
def _random_mac(conn):
"""Generate a random MAC address.
00-16-3E allocated to xensource
52-54-00 used by qemu/kvm
The OUI list is available at http://standards.ieee.org/regauth/oui/oui.txt.
The remaining 3 fields are random, with the first bit of the first
random field set 0.
@return: MAC address string
"""
if conn.is_qemu():
oui = [0x52, 0x54, 0x00]
else:
# Xen
oui = [0x00, 0x16, 0x3E]
mac = oui + [
random.randint(0x00, 0xff),
random.randint(0x00, 0xff),
random.randint(0x00, 0xff)]
return ':'.join(["%02x" % x for x in mac])
def _default_route():
route_file = "/proc/net/route"
if not os.path.exists(route_file):
logging.debug("route_file=%s does not exist", route_file)
return None
for line in open(route_file):
info = line.split()
if len(info) != 11:
logging.debug("Unexpected field count=%s when parsing %s",
len(info), route_file)
break
try:
route = int(info[1], 16)
if route == 0:
return info[0]
except ValueError:
continue
return None
def _default_bridge(conn):
if "VIRTINST_TEST_SUITE" in os.environ:
return "eth0"
if conn.is_remote():
return None
dev = _default_route()
if not dev:
return None
# New style peth0 == phys dev, eth0 == bridge, eth0 == default route
if os.path.exists("/sys/class/net/%s/bridge" % dev):
return dev
# Old style, peth0 == phys dev, eth0 == netloop, xenbr0 == bridge,
# vif0.0 == netloop enslaved, eth0 == default route
try:
defn = int(dev[-1])
except Exception:
defn = -1
if (defn >= 0 and
os.path.exists("/sys/class/net/peth%d/brport" % defn) and
os.path.exists("/sys/class/net/xenbr%d/bridge" % defn)):
return "xenbr%d"
return None
def _default_network(conn):
ret = _default_bridge(conn)
if ret:
return ["bridge", ret]
# FIXME: Check that this exists
return ["network", "default"]
class VirtualPort(XMLBuilder):
_XML_ROOT_NAME = "virtualport"
type = XMLProperty("./@type")
managerid = XMLProperty("./parameters/@managerid", is_int=True)
typeid = XMLProperty("./parameters/@typeid", is_int=True)
typeidversion = XMLProperty("./parameters/@typeidversion", is_int=True)
instanceid = XMLProperty("./parameters/@instanceid")
profileid = XMLProperty("./parameters/@profileid")
interfaceid = XMLProperty("./parameters/@interfaceid")
class VirtualNetworkInterface(VirtualDevice):
virtual_device_type = VirtualDevice.VIRTUAL_DEV_NET
TYPE_BRIDGE = "bridge"
TYPE_VIRTUAL = "network"
TYPE_USER = "user"
TYPE_VHOSTUSER = "vhostuser"
TYPE_ETHERNET = "ethernet"
TYPE_DIRECT = "direct"
network_types = [TYPE_BRIDGE, TYPE_VIRTUAL, TYPE_USER, TYPE_ETHERNET,
TYPE_DIRECT]
@staticmethod
def get_network_type_desc(net_type):
"""
Return human readable description for passed network type
"""
desc = net_type.capitalize()
if net_type == VirtualNetworkInterface.TYPE_BRIDGE:
desc = _("Shared physical device")
elif net_type == VirtualNetworkInterface.TYPE_VIRTUAL:
desc = _("Virtual networking")
elif net_type == VirtualNetworkInterface.TYPE_USER:
desc = _("Usermode networking")
return desc
@staticmethod
def generate_mac(conn):
"""
Generate a random MAC that doesn't conflict with any VMs on
the connection.
"""
if conn.fake_conn_predictable():
# Testing hack
return "00:11:22:33:44:55"
for ignore in range(256):
mac = _random_mac(conn)
ret = VirtualNetworkInterface.is_conflict_net(conn, mac)
if ret[1] is None:
return mac
logging.debug("Failed to generate non-conflicting MAC")
return None
@staticmethod
def is_conflict_net(conn, searchmac):
"""
@returns: a two element tuple:
first element is True if fatal collision occured
second element is a string description of the collision.
Non fatal collisions (mac addr collides with inactive guest) will
return (False, "description of collision")
"""
if searchmac is None:
return (False, None)
vms = conn.fetch_all_guests()
for vm in vms:
for nic in vm.get_devices("interface"):
nicmac = nic.macaddr or ""
if nicmac.lower() == searchmac.lower():
return (True, _("The MAC address '%s' is in use "
"by another virtual machine.") % searchmac)
return (False, None)
def __init__(self, *args, **kwargs):
VirtualDevice.__init__(self, *args, **kwargs)
self._random_mac = None
self._default_bridge = None
###############
# XML helpers #
###############
def _generate_default_bridge(self):
ret = self._default_bridge
if ret is None:
ret = False
default = _default_bridge(self.conn)
if default:
ret = default
self._default_bridge = ret
return ret or None
def _get_default_bridge(self):
if self.type == self.TYPE_BRIDGE:
return self._generate_default_bridge()
return None
def _default_source_mode(self):
if self.type == self.TYPE_DIRECT:
return "vepa"
return None
def _get_default_mac(self):
if not self._random_mac:
self._random_mac = self.generate_mac(self.conn)
return self._random_mac
def _validate_mac(self, val):
util.validate_macaddr(val)
return val
def _get_source(self):
"""
Convenience function, try to return the relevant <source> value
per the network type.
"""
if self.type == self.TYPE_VIRTUAL:
return self._network
if self.type == self.TYPE_BRIDGE:
return self._bridge
if self.type == self.TYPE_DIRECT:
return self._source_dev
if self.type == self.TYPE_USER or self.type == self.TYPE_ETHERNET:
return None
return self._network or self._bridge or self._source_dev
def _set_source(self, newsource):
"""
Convenience function, try to set the relevant <source> value
per the network type
"""
self._bridge = None
self._network = None
self._source_dev = None
if self.type == self.TYPE_VIRTUAL:
self._network = newsource
elif self.type == self.TYPE_BRIDGE:
self._bridge = newsource
elif self.type == self.TYPE_DIRECT:
self._source_dev = newsource
source = property(_get_source, _set_source)
##################
# XML properties #
##################
_XML_PROP_ORDER = [
"_bridge", "_network", "_source_dev", "source_type", "source_path",
"source_mode", "portgroup", "macaddr", "target_dev", "model",
"virtualport", "filterref", "rom_bar", "rom_file"]
_bridge = XMLProperty("./source/@bridge", default_cb=_get_default_bridge)
_network = XMLProperty("./source/@network")
_source_dev = XMLProperty("./source/@dev")
virtualport = XMLChildProperty(VirtualPort, is_single=True)
type = XMLProperty("./@type",
default_cb=lambda s: s.TYPE_BRIDGE)
trustGuestRxFilters = XMLProperty("./@trustGuestRxFilters", is_yesno=True)
macaddr = XMLProperty("./mac/@address",
set_converter=_validate_mac,
default_cb=_get_default_mac)
source_type = XMLProperty("./source/@type")
source_path = XMLProperty("./source/@path")
source_mode = XMLProperty("./source/@mode",
default_cb=_default_source_mode)
portgroup = XMLProperty("./source/@portgroup")
model = XMLProperty("./model/@type")
target_dev = XMLProperty("./target/@dev")
filterref = XMLProperty("./filterref/@filter")
link_state = XMLProperty("./link/@state")
driver_name = XMLProperty("./driver/@name")
driver_queues = XMLProperty("./driver/@queues", is_int=True)
rom_bar = XMLProperty("./rom/@bar", is_onoff=True)
rom_file = XMLProperty("./rom/@file")
#############
# Build API #
#############
def setup(self, meter=None):
ignore = meter
if not self.macaddr:
return
ret, msg = self.is_conflict_net(self.conn, self.macaddr)
if msg is None:
return
if ret is False:
logging.warning(msg)
else:
raise RuntimeError(msg)
def set_default_source(self):
if (self.conn.is_qemu_session() or self.conn.is_test()):
self.type = self.TYPE_USER
else:
self.type, self.source = _default_network(self.conn)
VirtualNetworkInterface.register_type()
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