diff options
Diffstat (limited to 'src/conf_mode/interfaces_ethernet.py')
| -rwxr-xr-x | src/conf_mode/interfaces_ethernet.py | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/src/conf_mode/interfaces_ethernet.py b/src/conf_mode/interfaces_ethernet.py new file mode 100755 index 000000000..7374a29f7 --- /dev/null +++ b/src/conf_mode/interfaces_ethernet.py @@ -0,0 +1,400 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2019-2021 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 +import pprint + +from glob import glob +from sys import exit + +from vyos.base import Warning +from vyos.config import Config +from vyos.configdict import get_interface_dict +from vyos.configdict import is_node_changed +from vyos.configverify import verify_address +from vyos.configverify import verify_dhcpv6 +from vyos.configverify import verify_eapol +from vyos.configverify import verify_interface_exists +from vyos.configverify import verify_mirror_redirect +from vyos.configverify import verify_mtu +from vyos.configverify import verify_mtu_ipv6 +from vyos.configverify import verify_vlan_config +from vyos.configverify import verify_vrf +from vyos.configverify import verify_bond_bridge_member +from vyos.ethtool import Ethtool +from vyos.ifconfig import EthernetIf +from vyos.ifconfig import BondIf +from vyos.pki import find_chain +from vyos.pki import encode_certificate +from vyos.pki import load_certificate +from vyos.pki import wrap_private_key +from vyos.template import render +from vyos.utils.process import call +from vyos.utils.dict import dict_search +from vyos.utils.dict import dict_to_paths_values +from vyos.utils.dict import dict_set +from vyos.utils.dict import dict_delete +from vyos.utils.file import write_file +from vyos import ConfigError +from vyos import airbag +airbag.enable() + +# XXX: wpa_supplicant works on the source interface +cfg_dir = '/run/wpa_supplicant' +wpa_suppl_conf = '/run/wpa_supplicant/{ifname}.conf' + +def update_bond_options(conf: Config, eth_conf: dict) -> list: + """ + Return list of blocked options if interface is a bond member + :param conf: Config object + :type conf: Config + :param eth_conf: Ethernet config dictionary + :type eth_conf: dict + :return: List of blocked options + :rtype: list + """ + blocked_list = [] + bond_name = list(eth_conf['is_bond_member'].keys())[0] + config_without_defaults = conf.get_config_dict( + ['interfaces', 'ethernet', eth_conf['ifname']], + key_mangling=('-', '_'), + get_first_key=True, + no_tag_node_value_mangle=True, + with_defaults=False, + with_recursive_defaults=False) + config_with_defaults = conf.get_config_dict( + ['interfaces', 'ethernet', eth_conf['ifname']], + key_mangling=('-', '_'), + get_first_key=True, + no_tag_node_value_mangle=True, + with_defaults=True, + with_recursive_defaults=True) + bond_config_with_defaults = conf.get_config_dict( + ['interfaces', 'bonding', bond_name], + key_mangling=('-', '_'), + get_first_key=True, + no_tag_node_value_mangle=True, + with_defaults=True, + with_recursive_defaults=True) + eth_dict_paths = dict_to_paths_values(config_without_defaults) + eth_path_base = ['interfaces', 'ethernet', eth_conf['ifname']] + + #if option is configured under ethernet section + for option_path, option_value in eth_dict_paths.items(): + bond_option_value = dict_search(option_path, bond_config_with_defaults) + + #If option is allowed for changing then continue + if option_path in EthernetIf.get_bond_member_allowed_options(): + continue + # if option is inherited from bond then set valued from bond interface + if option_path in BondIf.get_inherit_bond_options(): + # If option equals to bond option then do nothing + if option_value == bond_option_value: + continue + else: + # if ethernet has option and bond interface has + # then copy it from bond + if bond_option_value is not None: + if is_node_changed(conf, eth_path_base + option_path.split('.')): + Warning( + f'Cannot apply "{option_path.replace(".", " ")}" to "{option_value}".' \ + f' Interface "{eth_conf["ifname"]}" is a bond member.' \ + f' Option is inherited from bond "{bond_name}"') + dict_set(option_path, bond_option_value, eth_conf) + continue + # if ethernet has option and bond interface does not have + # then delete it form dict and do not apply it + else: + if is_node_changed(conf, eth_path_base + option_path.split('.')): + Warning( + f'Cannot apply "{option_path.replace(".", " ")}".' \ + f' Interface "{eth_conf["ifname"]}" is a bond member.' \ + f' Option is inherited from bond "{bond_name}"') + dict_delete(option_path, eth_conf) + blocked_list.append(option_path) + + # if inherited option is not configured under ethernet section but configured under bond section + for option_path in BondIf.get_inherit_bond_options(): + bond_option_value = dict_search(option_path, bond_config_with_defaults) + if bond_option_value is not None: + if option_path not in eth_dict_paths: + if is_node_changed(conf, eth_path_base + option_path.split('.')): + Warning( + f'Cannot apply "{option_path.replace(".", " ")}" to "{dict_search(option_path, config_with_defaults)}".' \ + f' Interface "{eth_conf["ifname"]}" is a bond member. ' \ + f'Option is inherited from bond "{bond_name}"') + dict_set(option_path, bond_option_value, eth_conf) + eth_conf['bond_blocked_changes'] = blocked_list + return None + +def get_config(config=None): + """ + Retrive CLI config as dictionary. Dictionary can never be empty, as at least the + interface name will be added or a deleted flag + """ + if config: + conf = config + else: + conf = Config() + + # This must be called prior to get_interface_dict(), as this function will + # alter the config level (config.set_level()) + pki = conf.get_config_dict(['pki'], key_mangling=('-', '_'), + get_first_key=True, no_tag_node_value_mangle=True) + + base = ['interfaces', 'ethernet'] + ifname, ethernet = get_interface_dict(conf, base) + if 'is_bond_member' in ethernet: + update_bond_options(conf, ethernet) + + if 'deleted' not in ethernet: + if pki: ethernet['pki'] = pki + + tmp = is_node_changed(conf, base + [ifname, 'speed']) + if tmp: ethernet.update({'speed_duplex_changed': {}}) + + tmp = is_node_changed(conf, base + [ifname, 'duplex']) + if tmp: ethernet.update({'speed_duplex_changed': {}}) + + return ethernet + + + +def verify_speed_duplex(ethernet: dict, ethtool: Ethtool): + """ + Verify speed and duplex + :param ethernet: dictionary which is received from get_interface_dict + :type ethernet: dict + :param ethtool: Ethernet object + :type ethtool: Ethtool + """ + if ((ethernet['speed'] == 'auto' and ethernet['duplex'] != 'auto') or + (ethernet['speed'] != 'auto' and ethernet['duplex'] == 'auto')): + raise ConfigError( + 'Speed/Duplex missmatch. Must be both auto or manually configured') + + if ethernet['speed'] != 'auto' and ethernet['duplex'] != 'auto': + # We need to verify if the requested speed and duplex setting is + # supported by the underlaying NIC. + speed = ethernet['speed'] + duplex = ethernet['duplex'] + if not ethtool.check_speed_duplex(speed, duplex): + raise ConfigError( + f'Adapter does not support changing speed ' \ + f'and duplex settings to: {speed}/{duplex}!') + + +def verify_flow_control(ethernet: dict, ethtool: Ethtool): + """ + Verify flow control + :param ethernet: dictionary which is received from get_interface_dict + :type ethernet: dict + :param ethtool: Ethernet object + :type ethtool: Ethtool + """ + if 'disable_flow_control' in ethernet: + if not ethtool.check_flow_control(): + raise ConfigError( + 'Adapter does not support changing flow-control settings!') + + +def verify_ring_buffer(ethernet: dict, ethtool: Ethtool): + """ + Verify ring buffer + :param ethernet: dictionary which is received from get_interface_dict + :type ethernet: dict + :param ethtool: Ethernet object + :type ethtool: Ethtool + """ + if 'ring_buffer' in ethernet: + max_rx = ethtool.get_ring_buffer_max('rx') + if not max_rx: + raise ConfigError( + 'Driver does not support RX ring-buffer configuration!') + + max_tx = ethtool.get_ring_buffer_max('tx') + if not max_tx: + raise ConfigError( + 'Driver does not support TX ring-buffer configuration!') + + rx = dict_search('ring_buffer.rx', ethernet) + if rx and int(rx) > int(max_rx): + raise ConfigError(f'Driver only supports a maximum RX ring-buffer ' \ + f'size of "{max_rx}" bytes!') + + tx = dict_search('ring_buffer.tx', ethernet) + if tx and int(tx) > int(max_tx): + raise ConfigError(f'Driver only supports a maximum TX ring-buffer ' \ + f'size of "{max_tx}" bytes!') + + +def verify_offload(ethernet: dict, ethtool: Ethtool): + """ + Verify offloading capabilities + :param ethernet: dictionary which is received from get_interface_dict + :type ethernet: dict + :param ethtool: Ethernet object + :type ethtool: Ethtool + """ + if dict_search('offload.rps', ethernet) != None: + if not os.path.exists(f'/sys/class/net/{ethernet["ifname"]}/queues/rx-0/rps_cpus'): + raise ConfigError('Interface does not suport RPS!') + driver = ethtool.get_driver_name() + # T3342 - Xen driver requires special treatment + if driver == 'vif': + if int(ethernet['mtu']) > 1500 and dict_search('offload.sg', ethernet) == None: + raise ConfigError('Xen netback drivers requires scatter-gatter offloading '\ + 'for MTU size larger then 1500 bytes') + + +def verify_allowedbond_changes(ethernet: dict): + """ + Verify changed options if interface is in bonding + :param ethernet: dictionary which is received from get_interface_dict + :type ethernet: dict + """ + if 'bond_blocked_changes' in ethernet: + for option in ethernet['bond_blocked_changes']: + raise ConfigError(f'Cannot configure "{option.replace(".", " ")}"' \ + f' on interface "{ethernet["ifname"]}".' \ + f' Interface is a bond member') + + +def verify(ethernet): + if 'deleted' in ethernet: + return None + if 'is_bond_member' in ethernet: + verify_bond_member(ethernet) + else: + verify_ethernet(ethernet) + + +def verify_bond_member(ethernet): + """ + Verification function for ethernet interface which is in bonding + :param ethernet: dictionary which is received from get_interface_dict + :type ethernet: dict + """ + ifname = ethernet['ifname'] + verify_interface_exists(ifname) + verify_eapol(ethernet) + verify_mirror_redirect(ethernet) + ethtool = Ethtool(ifname) + verify_speed_duplex(ethernet, ethtool) + verify_flow_control(ethernet, ethtool) + verify_ring_buffer(ethernet, ethtool) + verify_offload(ethernet, ethtool) + verify_allowedbond_changes(ethernet) + +def verify_ethernet(ethernet): + """ + Verification function for simple ethernet interface + :param ethernet: dictionary which is received from get_interface_dict + :type ethernet: dict + """ + ifname = ethernet['ifname'] + verify_interface_exists(ifname) + verify_mtu(ethernet) + verify_mtu_ipv6(ethernet) + verify_dhcpv6(ethernet) + verify_address(ethernet) + verify_vrf(ethernet) + verify_bond_bridge_member(ethernet) + verify_eapol(ethernet) + verify_mirror_redirect(ethernet) + ethtool = Ethtool(ifname) + # No need to check speed and duplex keys as both have default values. + verify_speed_duplex(ethernet, ethtool) + verify_flow_control(ethernet, ethtool) + verify_ring_buffer(ethernet, ethtool) + verify_offload(ethernet, ethtool) + # use common function to verify VLAN configuration + verify_vlan_config(ethernet) + return None + + +def generate(ethernet): + # render real configuration file once + wpa_supplicant_conf = wpa_suppl_conf.format(**ethernet) + + if 'deleted' in ethernet: + # delete configuration on interface removal + if os.path.isfile(wpa_supplicant_conf): + os.unlink(wpa_supplicant_conf) + return None + + if 'eapol' in ethernet: + ifname = ethernet['ifname'] + + render(wpa_supplicant_conf, 'ethernet/wpa_supplicant.conf.j2', ethernet) + + cert_file_path = os.path.join(cfg_dir, f'{ifname}_cert.pem') + cert_key_path = os.path.join(cfg_dir, f'{ifname}_cert.key') + + cert_name = ethernet['eapol']['certificate'] + pki_cert = ethernet['pki']['certificate'][cert_name] + + loaded_pki_cert = load_certificate(pki_cert['certificate']) + loaded_ca_certs = {load_certificate(c['certificate']) + for c in ethernet['pki']['ca'].values()} if 'ca' in ethernet['pki'] else {} + + cert_full_chain = find_chain(loaded_pki_cert, loaded_ca_certs) + + write_file(cert_file_path, + '\n'.join(encode_certificate(c) for c in cert_full_chain)) + write_file(cert_key_path, wrap_private_key(pki_cert['private']['key'])) + + if 'ca_certificate' in ethernet['eapol']: + ca_cert_file_path = os.path.join(cfg_dir, f'{ifname}_ca.pem') + ca_chains = [] + + for ca_cert_name in ethernet['eapol']['ca_certificate']: + pki_ca_cert = ethernet['pki']['ca'][ca_cert_name] + loaded_ca_cert = load_certificate(pki_ca_cert['certificate']) + ca_full_chain = find_chain(loaded_ca_cert, loaded_ca_certs) + ca_chains.append( + '\n'.join(encode_certificate(c) for c in ca_full_chain)) + + write_file(ca_cert_file_path, '\n'.join(ca_chains)) + + return None + +def apply(ethernet): + ifname = ethernet['ifname'] + # take care about EAPoL supplicant daemon + eapol_action='stop' + + e = EthernetIf(ifname) + if 'deleted' in ethernet: + # delete interface + e.remove() + else: + e.update(ethernet) + if 'eapol' in ethernet: + eapol_action='reload-or-restart' + + call(f'systemctl {eapol_action} wpa_supplicant-wired@{ifname}') + +if __name__ == '__main__': + try: + c = get_config() + verify(c) + generate(c) + + apply(c) + except ConfigError as e: + print(e) + exit(1) |