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import errno
from . import hotplug
from .decorators import *
import tuned.logs
from tuned.utils.nettool import ethcard
from tuned.utils.commands import commands
import os
import re
log = tuned.logs.get()
WOL_VALUES = "pumbagsd"
class NetTuningPlugin(hotplug.Plugin):
"""
`net`::
Configures network driver, hardware and Netfilter settings.
Dynamic change of the interface speed according to the interface
utilization is also supported. The dynamic tuning is controlled by
the [option]`dynamic` and the global [option]`dynamic_tuning`
option in `tuned-main.conf`.
+
The [option]`wake_on_lan` option sets wake-on-lan to the specified
value as when using the `ethtool` utility.
+
.Set Wake-on-LAN for device eth0 on MagicPacket(TM)
====
----
[net]
devices=eth0
wake_on_lan=g
----
====
+
The [option]`coalesce` option allows changing coalescing settings
for the specified network devices. The syntax is:
+
[subs="+quotes,+macros"]
----
coalesce=__param1__ __value1__ __param2__ __value2__ ... __paramN__ __valueN__
----
Note that not all the coalescing parameters are supported by all
network cards. For the list of coalescing parameters of your network
device, use `ethtool -c device`.
+
.Setting coalescing parameters rx/tx-usecs for all network devices
====
----
[net]
coalesce=rx-usecs 3 tx-usecs 16
----
====
+
The [option]`features` option allows changing
the offload parameters and other features for the specified
network devices. To query the features of your network device,
use `ethtool -k device`. The syntax of the option is the same as
the [option]`coalesce` option.
+
.Turn off TX checksumming, generic segmentation and receive offload
====
----
[net]
features=tx off gso off gro off
----
====
The [option]`pause` option allows changing the pause parameters for
the specified network devices. To query the pause parameters of your
network device, use `ethtool -a device`. The syntax of the option
is the same as the [option]`coalesce` option.
+
.Disable autonegotiation
====
----
[net]
pause=autoneg off
----
====
+
The [option]`ring` option allows changing the rx/tx ring parameters
for the specified network devices. To query the ring parameters of your
network device, use `ethtool -g device`. The syntax of the option
is the same as the [option]`coalesce` option.
+
.Change the number of ring entries for the Rx/Tx rings to 1024/512 respectively
=====
-----
[net]
ring=rx 1024 tx 512
-----
=====
+
The [option]`channels` option allows changing the numbers of channels
for the specified network device. A channel is an IRQ and the set
of queues that can trigger that IRQ. To query the channels parameters of your
network device, use `ethtool -l device`. The syntax of the option
is the same as the [option]`coalesce` option.
+
.Set the number of multi-purpose channels to 16
=====
-----
[net]
channels=combined 16
-----
=====
+
A network device either supports rx/tx or combined queue
mode. The [option]`channels` option automatically adjusts the
parameters based on the mode supported by the device as long as a
valid configuration is requested.
+
The [option]`nf_conntrack_hashsize` option sets the size of the hash
table which stores lists of conntrack entries by writing to
`/sys/module/nf_conntrack/parameters/hashsize`.
+
.Adjust the size of the conntrack hash table
====
----
[net]
nf_conntrack_hashsize=131072
----
====
+
The [option]`txqueuelen` option allows changing txqueuelen (the length
of the transmit queue). It uses `ip` utility that is in package iproute
recommended for TuneD, so the package needs to be installed for its correct
functionality. To query the txqueuelen parameters of your network device
use `ip link show` and the current value is shown after the qlen column.
+
.Adjust the length of the transmit queue
====
----
[net]
txqueuelen=5000
----
====
+
The [option]`mtu` option allows changing MTU (Maximum Transmission Unit).
It uses `ip` utility that is in package iproute recommended for TuneD, so
the package needs to be installed for its correct functionality. To query
the MTU parameters of your network device use `ip link show` and the
current value is shown after the MTU column.
+
.Adjust the size of the MTU
====
----
[net]
mtu=9000
----
====
"""
def __init__(self, *args, **kwargs):
super(NetTuningPlugin, self).__init__(*args, **kwargs)
self._load_smallest = 0.05
self._level_steps = 6
self._cmd = commands()
self._re_ip_link_show = {}
self._use_ip = True
def _init_devices(self):
self._devices_supported = True
self._free_devices = set()
self._assigned_devices = set()
re_not_virtual = re.compile('(?!.*/virtual/.*)')
for device in self._hardware_inventory.get_devices("net"):
if re_not_virtual.match(device.device_path):
self._free_devices.add(device.sys_name)
log.debug("devices: %s" % str(self._free_devices));
def _get_device_objects(self, devices):
return [self._hardware_inventory.get_device("net", x) for x in devices]
def _instance_init(self, instance):
instance._has_static_tuning = True
if self._option_bool(instance.options["dynamic"]):
instance._has_dynamic_tuning = True
instance._load_monitor = self._monitors_repository.create("net", instance.assigned_devices)
instance._idle = {}
instance._stats = {}
else:
instance._has_dynamic_tuning = False
instance._load_monitor = None
instance._idle = None
instance._stats = None
def _instance_cleanup(self, instance):
if instance._load_monitor is not None:
self._monitors_repository.delete(instance._load_monitor)
instance._load_monitor = None
def _instance_apply_dynamic(self, instance, device):
self._instance_update_dynamic(instance, device)
def _instance_update_dynamic(self, instance, device):
load = [int(value) for value in instance._load_monitor.get_device_load(device)]
if load is None:
return
if not device in instance._stats:
self._init_stats_and_idle(instance, device)
self._update_stats(instance, device, load)
self._update_idle(instance, device)
stats = instance._stats[device]
idle = instance._idle[device]
if idle["level"] == 0 and idle["read"] >= self._level_steps and idle["write"] >= self._level_steps:
idle["level"] = 1
log.info("%s: setting 100Mbps" % device)
ethcard(device).set_speed(100)
elif idle["level"] == 1 and (idle["read"] == 0 or idle["write"] == 0):
idle["level"] = 0
log.info("%s: setting max speed" % device)
ethcard(device).set_max_speed()
log.debug("%s load: read %0.2f, write %0.2f" % (device, stats["read"], stats["write"]))
log.debug("%s idle: read %d, write %d, level %d" % (device, idle["read"], idle["write"], idle["level"]))
@classmethod
def _get_config_options_coalesce(cls):
return {
"adaptive-rx": None,
"adaptive-tx": None,
"rx-usecs": None,
"rx-frames": None,
"rx-usecs-irq": None,
"rx-frames-irq": None,
"tx-usecs": None,
"tx-frames": None,
"tx-usecs-irq": None,
"tx-frames-irq": None,
"stats-block-usecs": None,
"pkt-rate-low": None,
"rx-usecs-low": None,
"rx-frames-low": None,
"tx-usecs-low": None,
"tx-frames-low": None,
"pkt-rate-high": None,
"rx-usecs-high": None,
"rx-frames-high": None,
"tx-usecs-high": None,
"tx-frames-high": None,
"sample-interval": None
}
@classmethod
def _get_config_options_pause(cls):
return { "autoneg": None,
"rx": None,
"tx": None }
@classmethod
def _get_config_options_ring(cls):
return { "rx": None,
"rx-mini": None,
"rx-jumbo": None,
"tx": None }
@classmethod
def _get_config_options_channels(cls):
return { "rx": None,
"tx": None,
"other": None,
"combined": None }
@classmethod
def _get_config_options(cls):
return {
"dynamic": True,
"wake_on_lan": None,
"nf_conntrack_hashsize": None,
"features": None,
"coalesce": None,
"pause": None,
"ring": None,
"channels": None,
"txqueuelen": None,
"mtu": None,
}
def _init_stats_and_idle(self, instance, device):
max_speed = self._calc_speed(ethcard(device).get_max_speed())
instance._stats[device] = { "new": 4 * [0], "max": 2 * [max_speed, 1] }
instance._idle[device] = { "level": 0, "read": 0, "write": 0 }
def _update_stats(self, instance, device, new_load):
# put new to old
instance._stats[device]["old"] = old_load = instance._stats[device]["new"]
instance._stats[device]["new"] = new_load
# load difference
diff = [new_old[0] - new_old[1] for new_old in zip(new_load, old_load)]
instance._stats[device]["diff"] = diff
# adapt maximum expected load if the difference is higer
old_max_load = instance._stats[device]["max"]
max_load = [max(pair) for pair in zip(old_max_load, diff)]
instance._stats[device]["max"] = max_load
# read/write ratio
instance._stats[device]["read"] = float(diff[0]) / float(max_load[0])
instance._stats[device]["write"] = float(diff[2]) / float(max_load[2])
def _update_idle(self, instance, device):
# increase counter if there is no load, otherwise reset the counter
for operation in ["read", "write"]:
if instance._stats[device][operation] < self._load_smallest:
instance._idle[device][operation] += 1
else:
instance._idle[device][operation] = 0
def _instance_unapply_dynamic(self, instance, device):
if device in instance._idle and instance._idle[device]["level"] > 0:
instance._idle[device]["level"] = 0
log.info("%s: setting max speed" % device)
ethcard(device).set_max_speed()
def _calc_speed(self, speed):
# 0.6 is just a magical constant (empirical value): Typical workload on netcard won't exceed
# that and if it does, then the code is smart enough to adapt it.
# 1024 * 1024 as for MB -> B
# speed / 8 Mb -> MB
return (int) (0.6 * 1024 * 1024 * speed / 8)
# parse features/coalesce config parameters (those defined in profile configuration)
# context is for error message
def _parse_config_parameters(self, value, context):
# expand config variables
value = self._variables.expand(value)
# split supporting various dellimeters
v = str(re.sub(r"(:\s*)|(\s+)|(\s*;\s*)|(\s*,\s*)", " ", value)).split()
lv = len(v)
if lv % 2 != 0:
log.error("invalid %s parameter: '%s'" % (context, str(value)))
return None
if lv == 0:
return dict()
# convert flat list to dict
return dict(list(zip(v[::2], v[1::2])))
# parse features/coalesce device parameters (those returned by ethtool)
def _parse_device_parameters(self, value):
# substitute "Adaptive RX: val1 TX: val2" to 'adaptive-rx: val1' and
# 'adaptive-tx: val2' and workaround for ethtool inconsistencies
# (rhbz#1225375)
value = self._cmd.multiple_re_replace({
"Adaptive RX:": "adaptive-rx:",
"\\s+TX:": "\nadaptive-tx:",
"rx-frame-low:": "rx-frames-low:",
"rx-frame-high:": "rx-frames-high:",
"tx-frame-low:": "tx-frames-low:",
"tx-frame-high:": "tx-frames-high:",
"large-receive-offload:": "lro:",
"rx-checksumming:": "rx:",
"tx-checksumming:": "tx:",
"scatter-gather:": "sg:",
"tcp-segmentation-offload:": "tso:",
"udp-fragmentation-offload:": "ufo:",
"generic-segmentation-offload:": "gso:",
"generic-receive-offload:": "gro:",
"rx-vlan-offload:": "rxvlan:",
"tx-vlan-offload:": "txvlan:",
"ntuple-filters:": "ntuple:",
"receive-hashing:": "rxhash:",
}, value)
# remove empty lines, remove fixed parameters (those with "[fixed]")
vl = [v for v in value.split('\n') if len(str(v)) > 0 and not re.search(r"\[fixed\]$", str(v))]
if len(vl) < 2:
return None
# skip first line (device name), split to key/value,
# remove pairs which are not key/value
return dict([u for u in [re.split(r":\s*", str(v)) for v in vl[1:]] if len(u) == 2])
@classmethod
def _nf_conntrack_hashsize_path(self):
return "/sys/module/nf_conntrack/parameters/hashsize"
@command_set("wake_on_lan", per_device=True)
def _set_wake_on_lan(self, value, device, sim, remove):
if value is None:
return None
# see man ethtool for possible wol values, 0 added as an alias for 'd'
value = re.sub(r"0", "d", str(value));
if not re.match(r"^[" + WOL_VALUES + r"]+$", value):
log.warn("Incorrect 'wake_on_lan' value.")
return None
if not sim:
self._cmd.execute(["ethtool", "-s", device, "wol", value])
return value
@command_get("wake_on_lan")
def _get_wake_on_lan(self, device, ignore_missing=False):
value = None
try:
m = re.match(r".*Wake-on:\s*([" + WOL_VALUES + "]+).*", self._cmd.execute(["ethtool", device])[1], re.S)
if m:
value = m.group(1)
except IOError:
pass
return value
@command_set("nf_conntrack_hashsize")
def _set_nf_conntrack_hashsize(self, value, sim, remove):
if value is None:
return None
hashsize = int(value)
if hashsize >= 0:
if not sim:
self._cmd.write_to_file(self._nf_conntrack_hashsize_path(), hashsize, \
no_error = [errno.ENOENT] if remove else False)
return hashsize
else:
return None
@command_get("nf_conntrack_hashsize")
def _get_nf_conntrack_hashsize(self):
value = self._cmd.read_file(self._nf_conntrack_hashsize_path())
if len(value) > 0:
return int(value)
return None
def _call_ip_link(self, args=[]):
if not self._use_ip:
return None
args = ["ip", "link"] + args
(rc, out, err_msg) = self._cmd.execute(args, no_errors=[errno.ENOENT], return_err=True)
if rc == -errno.ENOENT:
log.warn("ip command not found, ignoring for other devices")
self._use_ip = False
return None
elif rc:
log.info("Problem calling ip command")
log.debug("(rc: %s, msg: '%s')" % (rc, err_msg))
return None
return out
def _ip_link_show(self, device=None):
args = ["show"]
if device:
args.append(device)
return self._call_ip_link(args)
@command_set("txqueuelen", per_device=True)
def _set_txqueuelen(self, value, device, sim, remove):
if value is None:
return None
try:
int(value)
except ValueError:
log.warn("txqueuelen value '%s' is not integer" % value)
return None
if not sim:
# there is inconsistency in "ip", where "txqueuelen" is set as it, but is shown as "qlen"
res = self._call_ip_link(["set", "dev", device, "txqueuelen", value])
if res is None:
log.warn("Cannot set txqueuelen for device '%s'" % device)
return None
return value
def _get_re_ip_link_show(self, arg):
"""
Return regex for int arg value from "ip link show" command
"""
if arg not in self._re_ip_link_show:
self._re_ip_link_show[arg] = re.compile(r".*\s+%s\s+(\d+)" % arg)
return self._re_ip_link_show[arg]
@command_get("txqueuelen")
def _get_txqueuelen(self, device, ignore_missing=False):
out = self._ip_link_show(device)
if out is None:
if not ignore_missing:
log.info("Cannot get 'ip link show' result for txqueuelen value for device '%s'" % device)
return None
res = self._get_re_ip_link_show("qlen").search(out)
if res is None:
# We can theoretically get device without qlen (http://linux-ip.net/gl/ip-cref/ip-cref-node17.html)
if not ignore_missing:
log.info("Cannot get txqueuelen value from 'ip link show' result for device '%s'" % device)
return None
return res.group(1)
@command_set("mtu", per_device=True)
def _set_mtu(self, value, device, sim, remove):
if value is None:
return None
try:
int(value)
except ValueError:
log.warn("mtu value '%s' is not integer" % value)
return None
if not sim:
res = self._call_ip_link(["set", "dev", device, "mtu", value])
if res is None:
log.warn("Cannot set mtu for device '%s'" % device)
return None
return value
@command_get("mtu")
def _get_mtu(self, device, ignore_missing=False):
out = self._ip_link_show(device)
if out is None:
if not ignore_missing:
log.info("Cannot get 'ip link show' result for mtu value for device '%s'" % device)
return None
res = self._get_re_ip_link_show("mtu").search(out)
if res is None:
# mtu value should be always present, but it's better to have a test
if not ignore_missing:
log.info("Cannot get mtu value from 'ip link show' result for device '%s'" % device)
return None
return res.group(1)
# d is dict: {parameter: value}
def _check_parameters(self, context, d):
if context == "features":
return True
params = set(d.keys())
supported_getter = { "coalesce": self._get_config_options_coalesce, \
"pause": self._get_config_options_pause, \
"ring": self._get_config_options_ring, \
"channels": self._get_config_options_channels }
supported = set(supported_getter[context]().keys())
if not params.issubset(supported):
log.error("unknown %s parameter(s): %s" % (context, str(params - supported)))
return False
return True
# parse output of ethtool -a
def _parse_pause_parameters(self, s):
s = self._cmd.multiple_re_replace(\
{"Autonegotiate": "autoneg",
"RX": "rx",
"TX": "tx"}, s)
l = s.split("\n")[1:]
l = [x for x in l if x != '' and not re.search(r"\[fixed\]", x)]
return dict([x for x in [re.split(r":\s*", x) for x in l] if len(x) == 2])
# parse output of ethtool -g
def _parse_ring_parameters(self, s):
a = re.split(r"^Current hardware settings:$", s, flags=re.MULTILINE)
s = a[1]
s = self._cmd.multiple_re_replace(\
{"RX": "rx",
"RX Mini": "rx-mini",
"RX Jumbo": "rx-jumbo",
"TX": "tx"}, s)
l = s.split("\n")
l = [x for x in l if x != '']
l = [x for x in [re.split(r":\s*", x) for x in l] if len(x) == 2]
return dict(l)
# parse output of ethtool -l
def _parse_channels_parameters(self, s):
a = re.split(r"^Current hardware settings:$", s, flags=re.MULTILINE)
s = a[1]
s = self._cmd.multiple_re_replace(\
{"RX": "rx",
"TX": "tx",
"Other": "other",
"Combined": "combined"}, s)
l = s.split("\n")
l = [x for x in l if x != '']
l = [x for x in [re.split(r":\s*", x) for x in l] if len(x) == 2]
return dict(l)
def _replace_channels_parameters(self, context, params_list, dev_params):
mod_params_list = []
if "combined" in params_list:
mod_params_list.extend(["rx", params_list[1], "tx", params_list[1]])
else:
cnt = str(max(int(params_list[1]), int(params_list[3])))
mod_params_list.extend(["combined", cnt])
return dict(list(zip(mod_params_list[::2], mod_params_list[1::2])))
def _check_device_support(self, context, parameters, device, dev_params):
"""Filter unsupported parameters and log warnings about it
Positional parameters:
context -- context of change
parameters -- parameters to change
device -- name of device on which should be parameters set
dev_params -- dictionary of currently known parameters of device
"""
supported_parameters = set(dev_params.keys())
parameters_to_change = set(parameters.keys())
# if parameters_to_change contains unsupported parameter(s) then remove
# it/them
unsupported_parameters = (parameters_to_change
- supported_parameters)
for param in unsupported_parameters:
log.warning("%s parameter %s is not supported by device %s" % (
context,
param,
device,
))
parameters.pop(param, None)
def _get_device_parameters(self, context, device):
context2opt = { "coalesce": "-c", "features": "-k", "pause": "-a", "ring": "-g", \
"channels": "-l"}
opt = context2opt[context]
ret, value = self._cmd.execute(["ethtool", opt, device])
if ret != 0 or len(value) == 0:
return None
context2parser = { "coalesce": self._parse_device_parameters, \
"features": self._parse_device_parameters, \
"pause": self._parse_pause_parameters, \
"ring": self._parse_ring_parameters, \
"channels": self._parse_channels_parameters }
parser = context2parser[context]
d = parser(value)
if context == "coalesce" and not self._check_parameters(context, d):
return None
return d
def _set_device_parameters(self, context, value, device, sim,
dev_params = None):
if value is None or len(value) == 0:
return None
d = self._parse_config_parameters(value, context)
if d is None or not self._check_parameters(context, d):
return {}
# check if device supports parameters and filter out unsupported ones
if dev_params:
self._check_device_support(context, d, device, dev_params)
# replace the channel parameters based on the device support
if context == "channels" and str(dev_params[next(iter(d))]) in ["n/a", "0"]:
d = self._replace_channels_parameters(context, self._cmd.dict2list(d), dev_params)
if not sim and len(d) != 0:
log.debug("setting %s: %s" % (context, str(d)))
context2opt = { "coalesce": "-C", "features": "-K", "pause": "-A", "ring": "-G", \
"channels": "-L"}
opt = context2opt[context]
# ignore ethtool return code 80, it means parameter is already set
self._cmd.execute(["ethtool", opt, device] + self._cmd.dict2list(d), no_errors = [80])
return d
def _custom_parameters(self, context, start, value, device, verify):
storage_key = self._storage_key(
command_name = context,
device_name = device)
if start:
params_current = self._get_device_parameters(context,
device)
if params_current is None or len(params_current) == 0:
return False
params_set = self._set_device_parameters(context,
value, device, verify,
dev_params = params_current)
# if none of parameters passed checks then the command completely
# failed
if params_set is None or len(params_set) == 0:
return False
relevant_params_current = [(param, value) for param, value
in params_current.items()
if param in params_set]
relevant_params_current = dict(relevant_params_current)
if verify:
res = (self._cmd.dict2list(params_set)
== self._cmd.dict2list(relevant_params_current))
self._log_verification_result(context, res,
params_set,
relevant_params_current,
device = device)
return res
# saved are only those parameters which passed checks
self._storage.set(storage_key, " ".join(
self._cmd.dict2list(relevant_params_current)))
else:
original_value = self._storage.get(storage_key)
# in storage are only those parameters which were already tested
# so skip check for supported parameters
self._set_device_parameters(context, original_value, device, False)
return None
@command_custom("features", per_device = True)
def _features(self, start, value, device, verify, ignore_missing):
return self._custom_parameters("features", start, value, device, verify)
@command_custom("coalesce", per_device = True)
def _coalesce(self, start, value, device, verify, ignore_missing):
return self._custom_parameters("coalesce", start, value, device, verify)
@command_custom("pause", per_device = True)
def _pause(self, start, value, device, verify, ignore_missing):
return self._custom_parameters("pause", start, value, device, verify)
@command_custom("ring", per_device = True)
def _ring(self, start, value, device, verify, ignore_missing):
return self._custom_parameters("ring", start, value, device, verify)
@command_custom("channels", per_device = True)
def _channels(self, start, value, device, verify, ignore_missing):
return self._custom_parameters("channels", start, value, device, verify)