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Diffstat (limited to 'build/neutron/agent/l3/namespaces.py')
| -rw-r--r-- | build/neutron/agent/l3/namespaces.py | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/build/neutron/agent/l3/namespaces.py b/build/neutron/agent/l3/namespaces.py deleted file mode 100644 index aa282052..00000000 --- a/build/neutron/agent/l3/namespaces.py +++ /dev/null @@ -1,142 +0,0 @@ -# Copyright 2015 Hewlett-Packard Development Company, L.P. -# -# 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. -# - -import functools - -from oslo_log import log as logging -from oslo_utils import excutils - -from neutron.agent.linux.interface import OVSInterfaceDriver -from neutron._i18n import _LE, _LW -from neutron.agent.linux import ip_lib - -LOG = logging.getLogger(__name__) - -NS_PREFIX = 'qrouter-' -INTERNAL_DEV_PREFIX = 'qr-' -EXTERNAL_DEV_PREFIX = 'qg-' -# TODO(Carl) It is odd that this file needs this. It is a dvr detail. -ROUTER_2_FIP_DEV_PREFIX = 'rfp-' - - -def build_ns_name(prefix, identifier): - """Builds a namespace name from the given prefix and identifier - - :param prefix: The prefix which must end with '-' for legacy reasons - :param identifier: The id associated with the namespace - """ - return prefix + identifier - - -def get_prefix_from_ns_name(ns_name): - """Parses prefix from prefix-identifier - - :param ns_name: The name of a namespace - :returns: The prefix ending with a '-' or None if there is no '-' - """ - dash_index = ns_name.find('-') - if 0 <= dash_index: - return ns_name[:dash_index + 1] - - -def get_id_from_ns_name(ns_name): - """Parses identifier from prefix-identifier - - :param ns_name: The name of a namespace - :returns: Identifier or None if there is no - to end the prefix - """ - dash_index = ns_name.find('-') - if 0 <= dash_index: - return ns_name[dash_index + 1:] - - -def check_ns_existence(f): - @functools.wraps(f) - def wrapped(self, *args, **kwargs): - if not self.exists(): - LOG.warning(_LW('Namespace %(name)s does not exists. Skipping ' - '%(func)s'), - {'name': self.name, 'func': f.__name__}) - return - try: - return f(self, *args, **kwargs) - except RuntimeError: - with excutils.save_and_reraise_exception() as ctx: - if not self.exists(): - LOG.debug('Namespace %(name)s was concurrently deleted', - self.name) - ctx.reraise = False - return wrapped - - -class Namespace(object): - - def __init__(self, name, agent_conf, driver, use_ipv6): - self.name = name - self.ip_wrapper_root = ip_lib.IPWrapper() - self.agent_conf = agent_conf - self.driver = driver - self.use_ipv6 = use_ipv6 - - def create(self): - ip_wrapper = self.ip_wrapper_root.ensure_namespace(self.name) - cmd = ['sysctl', '-w', 'net.ipv4.ip_forward=1'] - ip_wrapper.netns.execute(cmd) - if self.use_ipv6: - cmd = ['sysctl', '-w', 'net.ipv6.conf.all.forwarding=1'] - ip_wrapper.netns.execute(cmd) - - def delete(self): - try: - self.ip_wrapper_root.netns.delete(self.name) - except RuntimeError: - msg = _LE('Failed trying to delete namespace: %s') - LOG.exception(msg, self.name) - - def exists(self): - return self.ip_wrapper_root.netns.exists(self.name) - - -class RouterNamespace(Namespace): - - def __init__(self, router_id, agent_conf, driver, use_ipv6, ovs_driver): - self.router_id = router_id - self.ovs_driver = ovs_driver - name = self._get_ns_name(router_id) - super(RouterNamespace, self).__init__( - name, agent_conf, driver, use_ipv6) - - @classmethod - def _get_ns_name(cls, router_id): - return build_ns_name(NS_PREFIX, router_id) - - @check_ns_existence - def delete(self): - ns_ip = ip_lib.IPWrapper(namespace=self.name) - for d in ns_ip.get_devices(exclude_loopback=True): - if d.name.startswith(INTERNAL_DEV_PREFIX): - # device is on default bridge - self.driver.unplug(d.name, namespace=self.name, - prefix=INTERNAL_DEV_PREFIX) - elif d.name.startswith(ROUTER_2_FIP_DEV_PREFIX): - ns_ip.del_veth(d.name) - elif d.name.startswith(EXTERNAL_DEV_PREFIX): - self.ovs_driver.unplug( - d.name, - bridge=self.agent_conf.external_network_bridge, - namespace=self.name, - prefix=EXTERNAL_DEV_PREFIX) - - super(RouterNamespace, self).delete() |