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#!/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/>.
# T3619: mirror Linux Kernel defaults for ethernet offloading options into VyOS
# CLI. See https://vyos.dev/T3619#102254 for all the details.
# T3787: Remove deprecated UDP fragmentation offloading option
from sys import argv
from vyos.ethtool import Ethtool
from vyos.configtree import ConfigTree
if (len(argv) < 1):
print("Must specify file name!")
exit(1)
file_name = argv[1]
with open(file_name, 'r') as f:
config_file = f.read()
base = ['interfaces', 'ethernet']
config = ConfigTree(config_file)
if not config.exists(base):
exit(0)
for ifname in config.list_nodes(base):
eth = Ethtool(ifname)
# If GRO is enabled by the Kernel - we reflect this on the CLI. If GRO is
# enabled via CLI but not supported by the NIC - we remove it from the CLI
configured = config.exists(base + [ifname, 'offload', 'gro'])
enabled, fixed = eth.get_generic_receive_offload()
if configured and fixed:
config.delete(base + [ifname, 'offload', 'gro'])
elif enabled and not fixed:
config.set(base + [ifname, 'offload', 'gro'])
# If GSO is enabled by the Kernel - we reflect this on the CLI. If GSO is
# enabled via CLI but not supported by the NIC - we remove it from the CLI
configured = config.exists(base + [ifname, 'offload', 'gso'])
enabled, fixed = eth.get_generic_segmentation_offload()
if configured and fixed:
config.delete(base + [ifname, 'offload', 'gso'])
elif enabled and not fixed:
config.set(base + [ifname, 'offload', 'gso'])
# If LRO is enabled by the Kernel - we reflect this on the CLI. If LRO is
# enabled via CLI but not supported by the NIC - we remove it from the CLI
configured = config.exists(base + [ifname, 'offload', 'lro'])
enabled, fixed = eth.get_large_receive_offload()
if configured and fixed:
config.delete(base + [ifname, 'offload', 'lro'])
elif enabled and not fixed:
config.set(base + [ifname, 'offload', 'lro'])
# If SG is enabled by the Kernel - we reflect this on the CLI. If SG is
# enabled via CLI but not supported by the NIC - we remove it from the CLI
configured = config.exists(base + [ifname, 'offload', 'sg'])
enabled, fixed = eth.get_scatter_gather()
if configured and fixed:
config.delete(base + [ifname, 'offload', 'sg'])
elif enabled and not fixed:
config.set(base + [ifname, 'offload', 'sg'])
# If TSO is enabled by the Kernel - we reflect this on the CLI. If TSO is
# enabled via CLI but not supported by the NIC - we remove it from the CLI
configured = config.exists(base + [ifname, 'offload', 'tso'])
enabled, fixed = eth.get_tcp_segmentation_offload()
if configured and fixed:
config.delete(base + [ifname, 'offload', 'tso'])
elif enabled and not fixed:
config.set(base + [ifname, 'offload', 'tso'])
# Remove deprecated UDP fragmentation offloading option
if config.exists(base + [ifname, 'offload', 'ufo']):
config.delete(base + [ifname, 'offload', 'ufo'])
# Also while processing the interface configuration, not all adapters support
# changing the speed and duplex settings. If the desired speed and duplex
# values do not work for the NIC driver, we change them back to the default
# value of "auto" - which will be applied if the CLI node is deleted.
speed_path = base + [ifname, 'speed']
duplex_path = base + [ifname, 'duplex']
# speed and duplex must always be set at the same time if not set to "auto"
if config.exists(speed_path) and config.exists(duplex_path):
speed = config.return_value(speed_path)
duplex = config.return_value(duplex_path)
if speed != 'auto' and duplex != 'auto':
if not eth.check_speed_duplex(speed, duplex):
config.delete(speed_path)
config.delete(duplex_path)
# Also while processing the interface configuration, not all adapters support
# changing disabling flow-control - or change this setting. If disabling
# flow-control is not supported by the NIC, we remove the setting from CLI
flow_control_path = base + [ifname, 'disable-flow-control']
if config.exists(flow_control_path):
if not eth.check_flow_control():
config.delete(flow_control_path)
try:
with open(file_name, 'w') as f:
f.write(config.to_string())
except OSError as e:
print("Failed to save the modified config: {}".format(e))
exit(1)
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