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https://github.com/CumulusNetworks/ifupdown2.git
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fc5e1735c0
Ticket: cleanup Reviewed By: Testing Done: Tested ifupdown sanity This gets rid of some ugly previous flag handling which was passed through modules. This creates a global instance of flags that all addon modules and helper modules can use. Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
272 lines
12 KiB
Python
272 lines
12 KiB
Python
#!/usr/bin/python
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#
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# Copyright 2014 Cumulus Networks, Inc. All rights reserved.
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# Author: Roopa Prabhu, roopa@cumulusnetworks.com
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#
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import json
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import ifupdown.policymanager as policymanager
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try:
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from ipaddr import IPNetwork
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from sets import Set
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from ifupdown.iface import *
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from ifupdownaddons.utilsbase import *
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from ifupdownaddons.modulebase import moduleBase
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from ifupdownaddons.iproute2 import iproute2
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except ImportError, e:
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raise ImportError (str(e) + "- required module not found")
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class ethtool(moduleBase,utilsBase):
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""" ifupdown2 addon module to configure ethtool attributes """
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_modinfo = {'mhelp' : 'ethtool configuration module for interfaces',
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'attrs': {
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'link-speed' :
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{'help' : 'set link speed',
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'example' : ['link-speed 1000'],
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'default' : 'varies by platform and port'},
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'link-duplex' :
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{'help': 'set link duplex',
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'example' : ['link-duplex full'],
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'validvals' : ['half', 'full'],
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'default' : 'full'},
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'link-autoneg' :
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{'help': 'set autonegotiation',
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'example' : ['link-autoneg on'],
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'validvals' : ['on', 'off'],
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'default' : 'varies by platform and port'}}}
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def __init__(self, *args, **kargs):
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moduleBase.__init__(self, *args, **kargs)
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self.ipcmd = None
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# keep a list of iface objects who have modified link attributes
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self.ifaceobjs_modified_configs = []
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def _post_up(self, ifaceobj, operation='post_up'):
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"""
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_post_up and _pre_down will reset the layer 2 attributes to default policy
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settings.
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"""
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if not self.ipcmd.link_exists(ifaceobj.name):
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return
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cmd = ''
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for attr in ['speed', 'duplex', 'autoneg']:
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# attribute existed before but we must reset to default
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config_val = ifaceobj.get_attr_value_first('link-%s'%attr)
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default_val = policymanager.policymanager_api.get_iface_default(
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module_name='ethtool',
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ifname=ifaceobj.name,
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attr='link-%s'%attr)
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if not default_val and not config_val:
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# there is no point in checking the running config
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# if we have no default and the user did not have settings
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continue
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# check running values
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running_val = self.get_running_attr(attr, ifaceobj)
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# we need to track if an interface has a configured value
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# this will be used if there are duplicate iface stanza and
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# the configured interface will always take precedence.
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# so even if we do not change the settings because they match
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# what is configured, we need to append it here so that later duplicate
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# ifaces will see that we had a configured iface and not change things.
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if config_val and config_val == running_val:
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# running value is what is configured, do nothing
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# this prevents unconfigured ifaces from resetting to default
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self.ifaceobjs_modified_configs.append(ifaceobj.name)
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continue
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if not config_val and default_val and default_val == running_val:
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# nothing configured but the default is running
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continue
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# if we are the oldest sibling, we have to reset to defaults
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# unless a previous sibling had link attr configured and made changes
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if ((ifaceobj.flags & iface.HAS_SIBLINGS) and
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(ifaceobj.flags & iface.OLDEST_SIBLING) and
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(ifaceobj.name in self.ifaceobjs_modified_configs)):
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continue
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# if we are not the oldest and we have no configs, do not change anything
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# the only way a non-oldest sibling would change values is if it
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# had configured settings
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if (not ((ifaceobj.flags & iface.HAS_SIBLINGS) and
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(ifaceobj.flags & iface.OLDEST_SIBLING)) and
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not config_val):
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continue
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# if we got this far, we need to change it
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if config_val and (config_val != running_val):
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# if the configured value is not set, set it
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cmd += ' %s %s' % (attr, config_val)
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elif default_val and (default_val != running_val):
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# or if it has a default not equal to running value, set it
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cmd += ' %s %s' % (attr, default_val)
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else:
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# no value set nor default, leave it alone
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pass
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if cmd:
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try:
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# we should only be calling ethtool if there
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# is a speed set or we can find a default speed
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# because we should only be calling ethtool on swp ports
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# we also need to set this here in case we changed
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# something. this prevents unconfigured ifaces from resetting to default
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self.ifaceobjs_modified_configs.append(ifaceobj.name)
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cmd = 'ethtool -s %s %s' %(ifaceobj.name, cmd)
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self.exec_command(cmd)
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except Exception, e:
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ifaceobj.status = ifaceStatus.ERROR
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self.log_warn('%s: %s' %(ifaceobj.name, str(e)))
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else:
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pass
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def _pre_down(self, ifaceobj):
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pass #self._post_up(ifaceobj,operation="_pre_down")
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def _query_check(self, ifaceobj, ifaceobjcurr):
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"""
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_query_check() needs to compare the configured (or running)
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attribute with the running attribute.
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If there is nothing configured, we compare the default attribute with
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the running attribute and FAIL if they are different.
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This is because a reboot will lose their running attribute
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(the default will get set).
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"""
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for attr in ['speed', 'duplex', 'autoneg']:
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configured = ifaceobj.get_attr_value_first('link-%s'%attr)
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# if there is nothing configured, do not check
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if not configured:
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continue
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default = policymanager.policymanager_api.get_iface_default(
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module_name='ethtool',
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ifname=ifaceobj.name,
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attr='link-%s'%attr)
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# if we have no default, do not bother checking
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# this avoids ethtool calls on virtual interfaces
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if not default:
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continue
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# autoneg comes from ethtool whereas speed and duplex from /sys/class
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running_attr = self.get_running_attr(attr, ifaceobj)
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if (not running_attr):
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continue
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# we make sure we can get a running value first
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if (running_attr and configured and running_attr == configured):
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# PASS since running is what is configured
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ifaceobjcurr.update_config_with_status('link-%s'%attr,
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running_attr, 0)
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elif (running_attr and configured and running_attr != configured):
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# We show a FAIL since it is not the configured or default
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ifaceobjcurr.update_config_with_status('link-%s'%attr,
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running_attr, 1)
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elif (running_attr and default and running_attr == default):
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# PASS since running is default
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ifaceobjcurr.update_config_with_status('link-%s'%attr,
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running_attr, 0)
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elif (default or configured):
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# We show a FAIL since it is not the configured or default
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ifaceobjcurr.update_config_with_status('link-%s'%attr,
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running_attr, 1)
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return
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def get_autoneg(self,ethtool_output=None):
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"""
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get_autoneg simply calls the ethtool command and parses out
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the autoneg value.
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"""
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ethtool_attrs = ethtool_output.split()
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if ('Auto-negotiation:' in ethtool_attrs):
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return(ethtool_attrs[ethtool_attrs.index('Auto-negotiation:')+1])
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else:
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return(None)
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def get_running_attr(self,attr='',ifaceobj=None):
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if not ifaceobj or not attr:
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return
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running_attr = None
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try:
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if attr == 'autoneg':
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output=self.exec_commandl(['ethtool', ifaceobj.name])
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running_attr = self.get_autoneg(ethtool_output=output)
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else:
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running_attr = self.read_file_oneline('/sys/class/net/%s/%s' % \
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(ifaceobj.name, attr))
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except:
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# for nonexistent interfaces, we get an error (rc = 256 or 19200)
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self.logger.debug('ethtool: problems calling ethtool or reading'
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' /sys/class on iface %s for attr %s' % \
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(ifaceobj.name,attr))
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return running_attr
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def _query_running(self, ifaceobj, ifaceobj_getfunc=None):
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"""
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_query_running looks at the speed and duplex from /sys/class
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and retreives autoneg from ethtool. We do not report autoneg
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if speed is not available because this usually means the link is
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down and the autoneg value is not reliable when the link is down.
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"""
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# do not bother showing swp ifaces that are not up for the speed
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# duplex and autoneg are not reliable.
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if not self.ipcmd.is_link_up(ifaceobj.name):
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return
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for attr in ['speed', 'duplex', 'autoneg']:
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default_val = policymanager.policymanager_api.get_iface_default(
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module_name='ethtool',
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ifname=ifaceobj.name,
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attr='link-%s'%attr)
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# do not continue if we have no defaults
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# this avoids ethtool calls on virtual interfaces
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if not default_val:
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continue
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running_attr = self.get_running_attr(attr, ifaceobj)
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# Only show the link attributes if they differ from defaults
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# to see the defaults, we should implement another flag (--with-defaults)
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if default_val == running_attr:
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continue
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if running_attr:
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ifaceobj.update_config('link-%s'%attr, running_attr)
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return
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_run_ops = {'pre-down' : _pre_down,
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'post-up' : _post_up,
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'query-checkcurr' : _query_check,
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'query-running' : _query_running }
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def get_ops(self):
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""" returns list of ops supported by this module """
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return self._run_ops.keys()
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def _init_command_handlers(self):
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if not self.ipcmd:
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self.ipcmd = iproute2()
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def run(self, ifaceobj, operation, query_ifaceobj=None, **extra_args):
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""" run ethtool configuration on the interface object passed as
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argument
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Args:
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**ifaceobj** (object): iface object
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**operation** (str): any of 'post-up', 'query-checkcurr',
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'query-running'
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Kwargs:
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**query_ifaceobj** (object): query check ifaceobject. This is only
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valid when op is 'query-checkcurr'. It is an object same as
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ifaceobj, but contains running attribute values and its config
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status. The modules can use it to return queried running state
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of interfaces. status is success if the running state is same
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as user required state in ifaceobj. error otherwise.
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"""
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op_handler = self._run_ops.get(operation)
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if not op_handler:
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return
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self._init_command_handlers()
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if operation == 'query-checkcurr':
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op_handler(self, ifaceobj, query_ifaceobj)
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else:
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op_handler(self, ifaceobj)
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