5a6f63a1ad
Occassionally I've found myself debugging os-net-config's behavior related to detecting active nics. This adds a little debugging output to help see what's going on in the ordered_active_nics function. Change-Id: If7ea010071d2253b29aaaabb242690ea5fbfb165
114 lines
3.3 KiB
Python
114 lines
3.3 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
# Copyright 2014 Red Hat, Inc.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
import glob
|
|
import logging
|
|
import os
|
|
import re
|
|
|
|
|
|
logger = logging.getLogger(__name__)
|
|
_SYS_CLASS_NET = '/sys/class/net'
|
|
|
|
|
|
def write_config(filename, data):
|
|
with open(filename, 'w') as f:
|
|
f.write(str(data))
|
|
|
|
|
|
def get_file_data(filename):
|
|
if not os.path.exists(filename):
|
|
return ''
|
|
|
|
try:
|
|
with open(filename, 'r') as f:
|
|
return f.read()
|
|
except IOError:
|
|
logger.error("Error reading file: %s" % filename)
|
|
return ''
|
|
|
|
|
|
def interface_mac(name):
|
|
try:
|
|
with open('/sys/class/net/%s/address' % name, 'r') as f:
|
|
return f.read().rstrip()
|
|
except IOError:
|
|
logger.error("Unable to read mac address: %s" % name)
|
|
raise
|
|
|
|
|
|
def _is_active_nic(interface_name):
|
|
try:
|
|
if interface_name == 'lo':
|
|
return False
|
|
|
|
device_dir = _SYS_CLASS_NET + '/%s/device' % interface_name
|
|
has_device_dir = os.path.isdir(device_dir)
|
|
|
|
operstate = None
|
|
with open(_SYS_CLASS_NET + '/%s/operstate' % interface_name, 'r') as f:
|
|
operstate = f.read().rstrip().lower()
|
|
|
|
address = None
|
|
with open(_SYS_CLASS_NET + '/%s/address' % interface_name, 'r') as f:
|
|
address = f.read().rstrip()
|
|
|
|
if has_device_dir and operstate == 'up' and address:
|
|
return True
|
|
else:
|
|
return False
|
|
except IOError:
|
|
return False
|
|
|
|
|
|
def _natural_sort_key(s):
|
|
nsre = re.compile('([0-9]+)')
|
|
return [int(text) if text.isdigit() else text
|
|
for text in re.split(nsre, s)]
|
|
|
|
|
|
def ordered_active_nics():
|
|
embedded_nics = []
|
|
nics = []
|
|
logger.debug("Finding active nics")
|
|
for name in glob.iglob(_SYS_CLASS_NET + '/*'):
|
|
nic = name[(len(_SYS_CLASS_NET) + 1):]
|
|
if _is_active_nic(nic):
|
|
if nic.startswith('em') or nic.startswith('eth') or \
|
|
nic.startswith('eno'):
|
|
logger.debug("%s is an embedded active nic" % nic)
|
|
embedded_nics.append(nic)
|
|
else:
|
|
logger.debug("%s is an active nic" % nic)
|
|
nics.append(nic)
|
|
else:
|
|
logger.debug("%s is not an active nic" % nic)
|
|
# NOTE: we could just natural sort all active devices,
|
|
# but this ensures em, eno, and eth are ordered first
|
|
# (more backwards compatible)
|
|
active_nics = (sorted(embedded_nics, key=_natural_sort_key) +
|
|
sorted(nics, key=_natural_sort_key))
|
|
logger.debug("Active nics are %s" % active_nics)
|
|
return active_nics
|
|
|
|
|
|
def diff(filename, data):
|
|
file_data = get_file_data(filename)
|
|
logger.debug("Diff file data:\n%s" % file_data)
|
|
logger.debug("Diff data:\n%s" % data)
|
|
# convert to string as JSON may have unicode in it
|
|
return not file_data == data
|