diff options
| -rw-r--r-- | python/vyos/ethtool.py | 101 | ||||
| -rwxr-xr-x | src/conf_mode/interfaces-ethernet.py | 16 |
2 files changed, 117 insertions, 0 deletions
diff --git a/python/vyos/ethtool.py b/python/vyos/ethtool.py new file mode 100644 index 000000000..cef7d476f --- /dev/null +++ b/python/vyos/ethtool.py @@ -0,0 +1,101 @@ +# Copyright 2021 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/>. + +from vyos.util import cmd + +class Ethtool: + """ + Class is used to retrive and cache information about an ethernet adapter + """ + + # dictionary containing driver featurs, it will be populated on demand and + # the content will look like: + # { + # 'tls-hw-tx-offload': {'fixed': True, 'on': False}, + # 'tx-checksum-fcoe-crc': {'fixed': True, 'on': False}, + # 'tx-checksum-ip-generic': {'fixed': False, 'on': True}, + # 'tx-checksum-ipv4': {'fixed': True, 'on': False}, + # 'tx-checksum-ipv6': {'fixed': True, 'on': False}, + # 'tx-checksum-sctp': {'fixed': True, 'on': False}, + # 'tx-checksumming': {'fixed': False, 'on': True}, + # 'tx-esp-segmentation': {'fixed': True, 'on': False}, + # } + features = { } + ring_buffers = { } + + def __init__(self, ifname): + # Now populate features dictionaty + tmp = cmd(f'ethtool -k {ifname}') + # skip the first line, it only says: "Features for eth0": + for line in tmp.splitlines()[1:]: + if ":" in line: + key, value = [s.strip() for s in line.strip().split(":", 1)] + fixed = "fixed" in value + if fixed: + value = value.split()[0].strip() + self.features[key.strip()] = { + "on": value == "on", + "fixed": fixed + } + + tmp = cmd(f'ethtool -g {ifname}') + # We are only interested in line 2-5 which contains the device maximum + # ringbuffers + for line in tmp.splitlines()[2:6]: + if ':' in line: + key, value = [s.strip() for s in line.strip().split(":", 1)] + key = key.lower().replace(' ', '_') + self.ring_buffers[key] = int(value) + + + def is_fixed_lro(self): + # in case of a missing configuration, rather return "fixed". In Ethtool + # terminology "fixed" means the setting can not be changed by the user. + return self.features.get('large-receive-offload', True).get('fixed', True) + + def is_fixed_gro(self): + # in case of a missing configuration, rather return "fixed". In Ethtool + # terminology "fixed" means the setting can not be changed by the user. + return self.features.get('generic-receive-offload', True).get('fixed', True) + + def is_fixed_gso(self): + # in case of a missing configuration, rather return "fixed". In Ethtool + # terminology "fixed" means the setting can not be changed by the user. + return self.features.get('generic-segmentation-offload', True).get('fixed', True) + + def is_fixed_sg(self): + # in case of a missing configuration, rather return "fixed". In Ethtool + # terminology "fixed" means the setting can not be changed by the user. + return self.features.get('scatter-gather', True).get('fixed', True) + + def is_fixed_tso(self): + # in case of a missing configuration, rather return "fixed". In Ethtool + # terminology "fixed" means the setting can not be changed by the user. + return self.features.get('tcp-segmentation-offload', True).get('fixed', True) + + def is_fixed_ufo(self): + # in case of a missing configuration, rather return "fixed". In Ethtool + # terminology "fixed" means the setting can not be changed by the user. + return self.features.get('udp-fragmentation-offload', True).get('fixed', True) + + def get_rx_buffer(self): + # in case of a missing configuration rather return a "small" + # buffer of only 512 bytes. + return self.ring_buffers.get('rx', '512') + + def get_tx_buffer(self): + # in case of a missing configuration rather return a "small" + # buffer of only 512 bytes. + return self.ring_buffers.get('tx', '512') diff --git a/src/conf_mode/interfaces-ethernet.py b/src/conf_mode/interfaces-ethernet.py index e7f0cd6a5..e92c16eb6 100755 --- a/src/conf_mode/interfaces-ethernet.py +++ b/src/conf_mode/interfaces-ethernet.py @@ -30,6 +30,7 @@ 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.ethtool import Ethtool from vyos.ifconfig import EthernetIf from vyos.template import render from vyos.util import call @@ -80,6 +81,21 @@ def verify(ethernet): if not os.path.exists(f'/sys/class/net/{ifname}/queues/rx-0/rps_cpus'): raise ConfigError('Interface does not suport RPS!') + ethtool = Ethtool(ifname) + if 'ring_buffer' in ethernet: + max_rx = ethtool.get_rx_buffer() + max_tx = ethtool.get_tx_buffer() + + 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!') + # XDP requires multiple TX queues if 'xdp' in ethernet: queues = glob(f'/sys/class/net/{ifname}/queues/tx-*') |