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# Copyright 2019 VyOS maintainers and contributors <maintainers@vyos.io>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/>.
import os
import re
from vyos.ifconfig.vlan import VLANIf
from vyos.validate import *
class EthernetIf(VLANIf):
"""
Abstraction of a Linux Ethernet Interface
"""
_command_set = {**VLANIf._command_set, **{
'gro': {
'validate': lambda v: assert_list(v, ['on', 'off']),
'shellcmd': '/sbin/ethtool -K {ifname} gro {value}',
},
'gso': {
'validate': lambda v: assert_list(v, ['on', 'off']),
'shellcmd': '/sbin/ethtool -K {ifname} gso {value}',
},
'sg': {
'validate': lambda v: assert_list(v, ['on', 'off']),
'shellcmd': '/sbin/ethtool -K {ifname} sg {value}',
},
'tso': {
'validate': lambda v: assert_list(v, ['on', 'off']),
'shellcmd': '/sbin/ethtool -K {ifname} tso {value}',
},
'ufo': {
'validate': lambda v: assert_list(v, ['on', 'off']),
'shellcmd': '/sbin/ethtool -K {ifname} ufo {value}',
},
}}
default = {
'type': 'ethernet',
}
def _delete(self):
# Ethernet interfaces can not be removed
pass
def get_driver_name(self):
"""
Return the driver name used by NIC. Some NICs don't support all
features e.g. changing link-speed, duplex
Example:
>>> from vyos.ifconfig import EthernetIf
>>> i = EthernetIf('eth0')
>>> i.get_driver_name()
'vmxnet3'
"""
sysfs_file = '/sys/class/net/{}/device/driver/module'.format(
self.config['ifname'])
if os.path.exists(sysfs_file):
link = os.readlink(sysfs_file)
return os.path.basename(link)
else:
return None
def set_flow_control(self, enable):
"""
Changes the pause parameters of the specified Ethernet device.
@param enable: true -> enable pause frames, false -> disable pause frames
Example:
>>> from vyos.ifconfig import EthernetIf
>>> i = EthernetIf('eth0')
>>> i.set_flow_control(True)
"""
if enable not in ['on', 'off']:
raise ValueError("Value out of range")
if self.get_driver_name() in ['vmxnet3', 'virtio_net']:
self._debug_msg('{} driver does not support changing flow control settings!'
.format(self.get_driver_name()))
return
# Get current flow control settings:
cmd = '/sbin/ethtool --show-pause {0}'.format(self.config['ifname'])
tmp = self._cmd(cmd)
# The above command returns - with tabs:
#
# Pause parameters for eth0:
# Autonegotiate: on
# RX: off
# TX: off
if re.search("Autonegotiate:\ton", tmp):
if enable == "on":
# flowcontrol is already enabled - no need to re-enable it again
# this will prevent the interface from flapping as applying the
# flow-control settings will take the interface down and bring
# it back up every time.
return
# Assemble command executed on system. Unfortunately there is no way
# to change this setting via sysfs
cmd = '/sbin/ethtool --pause {0} autoneg {1} tx {1} rx {1}'.format(
self.config['ifname'], enable)
try:
# An exception will be thrown if the settings are not changed
return self._cmd(cmd)
except CalledProcessError:
pass
def set_speed_duplex(self, speed, duplex):
"""
Set link speed in Mbit/s and duplex.
@speed can be any link speed in MBit/s, e.g. 10, 100, 1000 auto
@duplex can be half, full, auto
Example:
>>> from vyos.ifconfig import EthernetIf
>>> i = EthernetIf('eth0')
>>> i.set_speed_duplex('auto', 'auto')
"""
if speed not in ['auto', '10', '100', '1000', '2500', '5000', '10000', '25000', '40000', '50000', '100000', '400000']:
raise ValueError("Value out of range (speed)")
if duplex not in ['auto', 'full', 'half']:
raise ValueError("Value out of range (duplex)")
if self.get_driver_name() in ['vmxnet3', 'virtio_net']:
self._debug_msg('{} driver does not support changing speed/duplex settings!'
.format(self.get_driver_name()))
return
# Get current speed and duplex settings:
cmd = '/sbin/ethtool {0}'.format(self.config['ifname'])
tmp = self._cmd(cmd)
if re.search("\tAuto-negotiation: on", tmp):
if speed == 'auto' and duplex == 'auto':
# bail out early as nothing is to change
return
else:
# read in current speed and duplex settings
cur_speed = 0
cur_duplex = ''
for line in tmp.splitlines():
if line.lstrip().startswith("Speed:"):
non_decimal = re.compile(r'[^\d.]+')
cur_speed = non_decimal.sub('', line)
continue
if line.lstrip().startswith("Duplex:"):
cur_duplex = line.split()[-1].lower()
break
if (cur_speed == speed) and (cur_duplex == duplex):
# bail out early as nothing is to change
return
cmd = '/sbin/ethtool -s {}'.format(self.config['ifname'])
if speed == 'auto' or duplex == 'auto':
cmd += ' autoneg on'
else:
cmd += ' speed {} duplex {} autoneg off'.format(speed, duplex)
return self._cmd(cmd)
def set_gro(self, state):
"""
Example:
>>> from vyos.ifconfig import EthernetIf
>>> i = EthernetIf('eth0')
>>> i.set_gro('on')
"""
return self.set_interface('gro', state)
def set_gso(self, state):
"""
Example:
>>> from vyos.ifconfig import EthernetIf
>>> i = EthernetIf('eth0')
>>> i.set_gso('on')
"""
return self.set_interface('gso', state)
def set_sg(self, state):
"""
Example:
>>> from vyos.ifconfig import EthernetIf
>>> i = EthernetIf('eth0')
>>> i.set_sg('on')
"""
return self.set_interface('sg', state)
def set_tso(self, state):
"""
Example:
>>> from vyos.ifconfig import EthernetIf
>>> i = EthernetIf('eth0')
>>> i.set_tso('on')
"""
return self.set_interface('tso', state)
def set_ufo(self, state):
"""
Example:
>>> from vyos.ifconfig import EthernetIf
>>> i = EthernetIf('eth0')
>>> i.set_udp_offload('on')
"""
if state not in ['on', 'off']:
raise ValueError('state must be "on" or "off"')
cmd = '/sbin/ethtool -K {} ufo {}'.format(self.config['ifname'], state)
return self._cmd(cmd)
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