# Copyright 2019 VyOS maintainers and contributors # # 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 . 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 RuntimeError: 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)