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https://github.com/CumulusNetworks/ifupdown2.git
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2ec2da0cf9
Ticket: CM-3525 Reviewed By: CCR-3326 Testing Done: Tested creating dummy devices using ifupdown2 This is modification to gospos loopback module. It solves the same purpose ie using linux dummy device like a loopback device but there were objections on calling it loopback so i have renamed it to link and i have changed it into a generic module that can do any 'ip link'. Can be extended for link args in the future. below example creates a loopy device $ifquery loopy auto loopy iface loopy link-type dummy $ifup loopy $ifquery -c loopy auto loopy iface loopy [pass] link-type dummy [pass] (cherry picked from commit 1151420408a53c106d29183a1e0da5562c8b03a3)
77 lines
2.8 KiB
Python
77 lines
2.8 KiB
Python
#!/usr/bin/python
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# This should be pretty simple and might not really even need to exist.
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# The key is that we need to call link_create with a type of "dummy"
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# since that will translate to 'ip link add loopbackX type dummy'
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# The config file should probably just indicate that the type is
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# loopback or dummy.
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from ifupdown.iface import *
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from ifupdownaddons.modulebase import moduleBase
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from ifupdownaddons.iproute2 import iproute2
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import logging
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class link(moduleBase):
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_modinfo = {'mhelp' : 'create/configure link types. similar to ip-link',
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'attrs' : {
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'link-type' :
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{'help' : 'type of link as in \'ip link\' command.',
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'example' : ['link-type <dummy|veth>']}}}
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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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def _is_my_interface(self, ifaceobj):
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if ifaceobj.get_attr_value_first('link-type'):
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return True
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return False
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def _up(self, ifaceobj):
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self.ipcmd.link_create(ifaceobj.name,
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ifaceobj.get_attr_value_first('link-type'))
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def _down(self, ifaceobj):
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if not self.PERFMODE and not self.ipcmd.link_exists(ifaceobj.name):
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return
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try:
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self.ipcmd.link_delete(ifaceobj.name)
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except Exception, e:
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self.log_warn(str(e))
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def _query_check(self, ifaceobj, ifaceobjcurr):
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if not self.ipcmd.link_exists(ifaceobj.name):
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ifaceobjcurr.update_config_with_status('link-type', 'None', 1)
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else:
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link_type = ifaceobj.get_attr_value_first('link-type')
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if self.ipcmd.link_get_kind(ifaceobj.name) == link_type:
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ifaceobjcurr.update_config_with_status('link-type',
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link_type, 0)
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else:
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ifaceobjcurr.update_config_with_status('link-type',
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link_type, 1)
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_run_ops = {'pre-up' : _up,
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'post-down' : _down,
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'query-checkcurr' : _query_check}
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def get_ops(self):
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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(**self.get_flags())
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def run(self, ifaceobj, operation, query_ifaceobj=None, **extra_args):
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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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if (operation != 'query-running' and
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not self._is_my_interface(ifaceobj)):
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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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