796157a3a1
Fixes bug: 1027194 Update the interface driver to use veths instead of tap devices. This change is compatible with the netns work. Change-Id: Ic236f5fdeb79eb36791434999df2b731856de092
290 lines
8.7 KiB
Python
290 lines
8.7 KiB
Python
# vim: tabstop=4 shiftwidth=4 softtabstop=4
|
|
# Copyright 2012 OpenStack LLC
|
|
# All Rights Reserved.
|
|
#
|
|
# 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.
|
|
|
|
from quantum.agent.linux import utils
|
|
from quantum.common import exceptions
|
|
|
|
|
|
class SubProcessBase(object):
|
|
def __init__(self, root_helper=None, namespace=None):
|
|
self.root_helper = root_helper
|
|
self.namespace = namespace
|
|
|
|
def _run(self, options, command, args):
|
|
if self.namespace:
|
|
return self._as_root(options, command, args)
|
|
else:
|
|
return self._execute(options, command, args)
|
|
|
|
def _as_root(self, options, command, args):
|
|
if not self.root_helper:
|
|
raise exceptions.SudoRequired()
|
|
return self._execute(options,
|
|
command,
|
|
args,
|
|
self.root_helper,
|
|
self.namespace)
|
|
|
|
@classmethod
|
|
def _execute(cls, options, command, args, root_helper=None,
|
|
namespace=None):
|
|
opt_list = ['-%s' % o for o in options]
|
|
if namespace:
|
|
ip_cmd = ['ip', 'netns', 'exec', namespace, 'ip']
|
|
else:
|
|
ip_cmd = ['ip']
|
|
return utils.execute(ip_cmd + opt_list + [command] + list(args),
|
|
root_helper=root_helper)
|
|
|
|
|
|
class IPWrapper(SubProcessBase):
|
|
def __init__(self, root_helper=None, namespace=None):
|
|
super(IPWrapper, self).__init__(root_helper=root_helper,
|
|
namespace=namespace)
|
|
self.netns = IpNetnsCommand(self)
|
|
|
|
def device(self, name):
|
|
return IPDevice(name, self.root_helper, self.namespace)
|
|
|
|
def get_devices(self):
|
|
retval = []
|
|
output = self._execute('o', 'link', ('list',),
|
|
self.root_helper, self.namespace)
|
|
for line in output.split('\n'):
|
|
if '<' not in line:
|
|
continue
|
|
tokens = line.split(':', 2)
|
|
if len(tokens) >= 3:
|
|
retval.append(IPDevice(tokens[1].strip(),
|
|
self.root_helper,
|
|
self.namespace))
|
|
return retval
|
|
|
|
def add_tuntap(self, name, mode='tap'):
|
|
self._as_root('', 'tuntap', ('add', name, 'mode', mode))
|
|
return IPDevice(name, self.root_helper, self.namespace)
|
|
|
|
def add_veth(self, name1, name2):
|
|
self._as_root('', 'link',
|
|
('add', name1, 'type', 'veth', 'peer', 'name', name2))
|
|
|
|
return (IPDevice(name1, self.root_helper, self.namespace),
|
|
IPDevice(name2, self.root_helper, self.namespace))
|
|
|
|
def ensure_namespace(self, name):
|
|
if not self.netns.exists(name):
|
|
ip = self.netns.add(name)
|
|
lo = ip.device('lo')
|
|
lo.link.set_up()
|
|
else:
|
|
ip = IP(self.root_helper, name)
|
|
return ip
|
|
|
|
def add_device_to_namespace(self, device):
|
|
if self.namespace:
|
|
device.link.set_netns(self.namespace)
|
|
|
|
@classmethod
|
|
def get_namespaces(cls, root_helper):
|
|
output = cls._execute('netns', ('list',), root_helper=root_helper)
|
|
return [l.strip() for l in output.split('\n')]
|
|
|
|
|
|
class IPDevice(SubProcessBase):
|
|
def __init__(self, name, root_helper=None, namespace=None):
|
|
super(IPDevice, self).__init__(root_helper=root_helper,
|
|
namespace=namespace)
|
|
self.name = name
|
|
self.link = IpLinkCommand(self)
|
|
self.addr = IpAddrCommand(self)
|
|
|
|
def __eq__(self, other):
|
|
return (other is not None and self.name == other.name
|
|
and self.namespace == other.namespace)
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
|
|
class IpCommandBase(object):
|
|
COMMAND = ''
|
|
|
|
def __init__(self, parent):
|
|
self._parent = parent
|
|
|
|
def _run(self, *args, **kwargs):
|
|
return self._parent._run(kwargs.get('options', []), self.COMMAND, args)
|
|
|
|
def _as_root(self, *args, **kwargs):
|
|
return self._parent._as_root(kwargs.get('options', []),
|
|
self.COMMAND,
|
|
args)
|
|
|
|
|
|
class IpDeviceCommandBase(IpCommandBase):
|
|
@property
|
|
def name(self):
|
|
return self._parent.name
|
|
|
|
|
|
class IpLinkCommand(IpDeviceCommandBase):
|
|
COMMAND = 'link'
|
|
|
|
def set_address(self, mac_address):
|
|
self._as_root('set', self.name, 'address', mac_address)
|
|
|
|
def set_mtu(self, mtu_size):
|
|
self._as_root('set', self.name, 'mtu', mtu_size)
|
|
|
|
def set_up(self):
|
|
self._as_root('set', self.name, 'up')
|
|
|
|
def set_down(self):
|
|
self._as_root('set', self.name, 'down')
|
|
|
|
def set_netns(self, namespace):
|
|
self._as_root('set', self.name, 'netns', namespace)
|
|
self._parent.namespace = namespace
|
|
|
|
def set_name(self, name):
|
|
self._as_root('set', self.name, 'name', name)
|
|
self._parent.name = name
|
|
|
|
def delete(self):
|
|
self._as_root('delete', self.name)
|
|
|
|
@property
|
|
def address(self):
|
|
return self.attributes.get('link/ether')
|
|
|
|
@property
|
|
def state(self):
|
|
return self.attributes.get('state')
|
|
|
|
@property
|
|
def mtu(self):
|
|
return self.attributes.get('mtu')
|
|
|
|
@property
|
|
def qdisc(self):
|
|
return self.attributes.get('qdisc')
|
|
|
|
@property
|
|
def qlen(self):
|
|
return self.attributes.get('qlen')
|
|
|
|
@property
|
|
def attributes(self):
|
|
return self._parse_line(self._run('show', self.name, options='o'))
|
|
|
|
def _parse_line(self, value):
|
|
device_name, settings = value.replace("\\", '').split('>', 1)
|
|
|
|
tokens = settings.split()
|
|
keys = tokens[::2]
|
|
values = [int(v) if v.isdigit() else v for v in tokens[1::2]]
|
|
|
|
retval = dict(zip(keys, values))
|
|
return retval
|
|
|
|
|
|
class IpAddrCommand(IpDeviceCommandBase):
|
|
COMMAND = 'addr'
|
|
|
|
def add(self, ip_version, cidr, broadcast, scope='global'):
|
|
self._as_root('add',
|
|
cidr,
|
|
'brd',
|
|
broadcast,
|
|
'scope',
|
|
scope,
|
|
'dev',
|
|
self.name,
|
|
options=[ip_version])
|
|
|
|
def delete(self, ip_version, cidr):
|
|
self._as_root('del',
|
|
cidr,
|
|
'dev',
|
|
self.name,
|
|
options=[ip_version])
|
|
|
|
def flush(self):
|
|
self._as_root('flush', self.name)
|
|
|
|
def list(self, scope=None, to=None, filters=[]):
|
|
retval = []
|
|
|
|
if scope:
|
|
filters += ['scope', scope]
|
|
if to:
|
|
filters += ['to', to]
|
|
|
|
for line in self._run('show', self.name, *filters).split('\n'):
|
|
line = line.strip()
|
|
if not line.startswith('inet'):
|
|
continue
|
|
parts = line.split()
|
|
if parts[0] == 'inet6':
|
|
version = 6
|
|
scope = parts[3]
|
|
else:
|
|
version = 4
|
|
scope = parts[5]
|
|
|
|
retval.append(dict(cidr=parts[1],
|
|
scope=scope,
|
|
ip_version=version,
|
|
dynamic=('dynamic' == parts[-1])))
|
|
return retval
|
|
|
|
|
|
class IpNetnsCommand(IpCommandBase):
|
|
COMMAND = 'netns'
|
|
|
|
def add(self, name):
|
|
self._as_root('add', name)
|
|
return IPWrapper(self._parent.root_helper, name)
|
|
|
|
def delete(self, name):
|
|
self._as_root('delete', name)
|
|
|
|
def execute(self, cmds):
|
|
if not self._parent.root_helper:
|
|
raise exceptions.SudoRequired()
|
|
elif not self._parent.namespace:
|
|
raise Exception(_('No namespace defined for parent'))
|
|
else:
|
|
return utils.execute(
|
|
['ip', 'netns', 'exec', self._parent.namespace] + list(cmds),
|
|
root_helper=self._parent.root_helper)
|
|
|
|
def exists(self, name):
|
|
output = self._as_root('list', options='o')
|
|
|
|
for line in output.split('\n'):
|
|
if name == line.strip():
|
|
return True
|
|
return False
|
|
|
|
|
|
def device_exists(device_name, root_helper=None, namespace=None):
|
|
try:
|
|
address = IPDevice(device_name, root_helper, namespace).link.address
|
|
except RuntimeError:
|
|
return False
|
|
return True
|