83 lines
3.1 KiB
Python
83 lines
3.1 KiB
Python
#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from neutron.agent.linux import utils as linux_utils
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from neutron.common import utils
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class IpsetManager(object):
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"""Wrapper for ipset."""
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def __init__(self, execute=None, root_helper=None, namespace=None):
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self.execute = execute or linux_utils.execute
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self.root_helper = root_helper
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self.namespace = namespace
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@utils.synchronized('ipset', external=True)
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def create_ipset_chain(self, chain_name, ethertype):
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cmd = ['ipset', 'create', '-exist', chain_name, 'hash:net', 'family',
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self._get_ipset_chain_type(ethertype)]
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self._apply(cmd)
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@utils.synchronized('ipset', external=True)
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def add_member_to_ipset_chain(self, chain_name, member_ip):
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cmd = ['ipset', 'add', '-exist', chain_name, member_ip]
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self._apply(cmd)
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@utils.synchronized('ipset', external=True)
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def refresh_ipset_chain_by_name(self, chain_name, member_ips, ethertype):
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new_chain_name = chain_name + '-new'
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chain_type = self._get_ipset_chain_type(ethertype)
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process_input = ["create %s hash:net family %s" % (new_chain_name,
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chain_type)]
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for ip in member_ips:
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process_input.append("add %s %s" % (new_chain_name, ip))
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self._restore_ipset_chains(process_input)
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self._swap_ipset_chains(new_chain_name, chain_name)
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self._destroy_ipset_chain(new_chain_name)
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@utils.synchronized('ipset', external=True)
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def del_ipset_chain_member(self, chain_name, member_ip):
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cmd = ['ipset', 'del', chain_name, member_ip]
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self._apply(cmd)
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@utils.synchronized('ipset', external=True)
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def destroy_ipset_chain_by_name(self, chain_name):
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self._destroy_ipset_chain(chain_name)
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def _apply(self, cmd, input=None):
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input = '\n'.join(input) if input else None
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cmd_ns = []
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if self.namespace:
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cmd_ns.extend(['ip', 'netns', 'exec', self.namespace])
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cmd_ns.extend(cmd)
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self.execute(cmd_ns,
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root_helper=self.root_helper,
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process_input=input)
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def _get_ipset_chain_type(self, ethertype):
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return 'inet6' if ethertype == 'IPv6' else 'inet'
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def _restore_ipset_chains(self, process_input):
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cmd = ['ipset', 'restore', '-exist']
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self._apply(cmd, process_input)
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def _swap_ipset_chains(self, src_chain, dest_chain):
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cmd = ['ipset', 'swap', src_chain, dest_chain]
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self._apply(cmd)
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def _destroy_ipset_chain(self, chain_name):
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cmd = ['ipset', 'destroy', chain_name]
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self._apply(cmd)
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