ifupdown2/ifupdown/ifupdownbase.py

   1 #!/usr/bin/python
   2 #
   3 # Copyright 2014-2017 Cumulus Networks, Inc. All rights reserved.
   4 # Author: Roopa Prabhu, roopa@cumulusnetworks.com
   5 #
   6 # ifupdownBase --
   7 #    base object for various ifupdown objects
   8 #
   9
  10 import re
  11 import os
  12 import logging
  13 import traceback
  14
  15 try:
  16     from ifupdown2.ifupdown.netlink import netlink
  17
  18     import ifupdown2.ifupdown.ifupdownflags as ifupdownflags
  19 except ImportError:
  20     from ifupdown.netlink import netlink
  21
  22     import ifupdown.ifupdownflags as ifupdownflags
  23
  24
  25 class ifupdownBase(object):
  26
  27     def __init__(self):
  28         modulename = self.__class__.__name__
  29         self.logger = logging.getLogger('ifupdown.' + modulename)
  30
  31     def ignore_error(self, errmsg):
  32         if (ifupdownflags.flags.FORCE == True or re.search(r'exists', errmsg,
  33             re.IGNORECASE | re.MULTILINE) is not None):
  34             return True
  35         return False
  36
  37     def log_warn(self, str):
  38         if self.ignore_error(str) == False:
  39             if self.logger.getEffectiveLevel() == logging.DEBUG:
  40                 traceback.print_stack()
  41                 traceback.print_exc()
  42             self.logger.warn(str)
  43         pass
  44
  45     def log_error(self, str):
  46         if self.ignore_error(str) == False:
  47             raise Exception(str)
  48         else:
  49             pass
  50
  51     def link_exists(self, ifacename):
  52         return os.path.exists('/sys/class/net/%s' %ifacename)
  53
  54     def link_up(self, ifacename):
  55         netlink.link_set_updown(ifacename, "up")
  56
  57     def link_down(self, ifacename):
  58         netlink.link_set_updown(ifacename, "down")