#!/usr/bin/env python3 # # Copyright (C) 2021 VyOS maintainers and contributors # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 or later as # published by the Free Software Foundation. # # 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, see <http://www.gnu.org/licenses/>. import os from sys import exit from tempfile import NamedTemporaryFile from vyos.config import Config from vyos.configdict import node_changed from vyos.ifconfig import Interface from vyos.util import call from vyos.util import dict_search from vyos.util import get_interface_config from vyos import ConfigError from vyos import airbag airbag.enable() def netns_interfaces(c, match): """ get NETNS bound interfaces """ matched = [] old_level = c.get_level() c.set_level(['interfaces']) section = c.get_config_dict([], get_first_key=True) for type in section: interfaces = section[type] for name in interfaces: interface = interfaces[name] if 'netns' in interface: v = interface.get('netns', '') if v == match: matched.append(name) c.set_level(old_level) return matched def get_config(config=None): if config: conf = config else: conf = Config() base = ['netns'] netns = conf.get_config_dict(base, get_first_key=True, no_tag_node_value_mangle=True) # determine which NETNS has been removed for name in node_changed(conf, base + ['name']): if 'netns_remove' not in netns: netns.update({'netns_remove' : {}}) netns['netns_remove'][name] = {} # get NETNS bound interfaces interfaces = netns_interfaces(conf, name) if interfaces: netns['netns_remove'][name]['interface'] = interfaces return netns def verify(netns): # ensure NETNS is not assigned to any interface if 'netns_remove' in netns: for name, config in netns['netns_remove'].items(): if 'interface' in config: raise ConfigError(f'Can not remove NETNS "{name}", it still has '\ f'member interfaces!') if 'name' in netns: for name, config in netns['name'].items(): print(name) return None def generate(netns): if not netns: return None return None def apply(netns): for tmp in (dict_search('netns_remove', netns) or []): if os.path.isfile(f'/run/netns/{tmp}'): call(f'ip netns del {tmp}') if 'name' in netns: for name, config in netns['name'].items(): if not os.path.isfile(f'/run/netns/{name}'): call(f'ip netns add {name}') return None if __name__ == '__main__': try: c = get_config() verify(c) generate(c) apply(c) except ConfigError as e: print(e) exit(1)