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interfaces_ethernet.py
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interfaces_ethernet.py
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#!/usr/bin/env python3
#
# Copyright (C) 2019-2024 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 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_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.configverify import verify_pki_certificate
from vyos.configverify import verify_pki_ca_certificate
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()
base = ['interfaces', 'ethernet']
ifname, ethernet = get_interface_dict(conf, base, with_pki=True)
# T5862 - default MTU is not acceptable in some environments
# There are cloud environments available where the maximum supported
# ethernet MTU is e.g. 1450 bytes, thus we clamp this to the adapters
# maximum MTU value or 1500 bytes - whatever is lower
if 'mtu' not in ethernet:
try:
ethernet['mtu'] = '1500'
max_mtu = EthernetIf(ifname).get_max_mtu()
if max_mtu < int(ethernet['mtu']):
ethernet['mtu'] = str(max_mtu)
except:
pass
if 'is_bond_member' in ethernet:
update_bond_options(conf, ethernet)
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_eapol(ethernet: dict):
"""
Common helper function used by interface implementations to perform
recurring validation of EAPoL configuration.
"""
if 'eapol' not in ethernet:
return
if 'certificate' not in ethernet['eapol']:
raise ConfigError('Certificate must be specified when using EAPoL!')
verify_pki_certificate(ethernet, ethernet['eapol']['certificate'], no_password_protected=True)
if 'ca_certificate' in ethernet['eapol']:
for ca_cert in ethernet['eapol']['ca_certificate']:
verify_pki_ca_certificate(ethernet, ca_cert)
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)

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