1 # Copyright (c) 2008,2009 Citrix Systems, Inc.
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU Lesser General Public License as published
5 # by the Free Software Foundation; version 2.1 only. with the special
6 # exception on linking described in file LICENSE.
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU Lesser General Public License for more details.
17 from xml.dom.minidom import getDOMImplementation
18 from xml.dom.minidom import parse as parseXML
22 """Returns a string to prefix to all file name references, which
23 is useful for testing."""
24 return the_root_prefix
25 def set_root_prefix(prefix):
26 global the_root_prefix
27 the_root_prefix = prefix
29 log_destination = "syslog"
30 def get_log_destination():
31 """Returns the current log destination.
32 'syslog' means "log to syslog".
33 'stderr' means "log to stderr"."""
34 return log_destination
35 def set_log_destination(dest):
36 global log_destination
37 log_destination = dest
44 if get_log_destination() == 'syslog':
53 class Error(Exception):
54 def __init__(self, msg):
55 Exception.__init__(self)
59 # Run external utilities
62 def run_command(command):
63 log("Running command: " + ' '.join(command))
64 rc = os.spawnl(os.P_WAIT, root_prefix() + command[0], *command)
66 log("Command failed %d: " % rc + ' '.join(command))
71 # Configuration File Handling.
74 class ConfigurationFile(object):
75 """Write a file, tracking old and new versions.
77 Supports writing a new version of a file and applying and
78 reverting those changes.
81 __STATE = {"OPEN":"OPEN",
82 "NOT-APPLIED":"NOT-APPLIED", "APPLIED":"APPLIED",
83 "REVERTED":"REVERTED", "COMMITTED": "COMMITTED"}
85 def __init__(self, path):
86 dirname,basename = os.path.split(path)
88 self.__state = self.__STATE['OPEN']
91 self.__path = os.path.join(dirname, basename)
92 self.__oldpath = os.path.join(dirname, "." + basename + ".xapi-old")
93 self.__newpath = os.path.join(dirname, "." + basename + ".xapi-new")
95 self.__f = open(self.__newpath, "w")
97 def attach_child(self, child):
98 self.__children.append(child)
105 return open(self.path()).readlines()
109 def write(self, args):
110 if self.__state != self.__STATE['OPEN']:
111 raise Error("Attempt to write to file in state %s" % self.__state)
115 if self.__state != self.__STATE['OPEN']:
116 raise Error("Attempt to close file in state %s" % self.__state)
119 self.__state = self.__STATE['NOT-APPLIED']
122 if self.__state != self.__STATE['NOT-APPLIED']:
123 raise Error("Attempt to compare file in state %s" % self.__state)
128 if self.__state != self.__STATE['NOT-APPLIED']:
129 raise Error("Attempt to apply configuration from state %s" % self.__state)
131 for child in self.__children:
134 log("Applying changes to %s configuration" % self.__path)
136 # Remove previous backup.
137 if os.access(self.__oldpath, os.F_OK):
138 os.unlink(self.__oldpath)
140 # Save current configuration.
141 if os.access(self.__path, os.F_OK):
142 os.link(self.__path, self.__oldpath)
143 os.unlink(self.__path)
145 # Apply new configuration.
146 assert(os.path.exists(self.__newpath))
147 os.link(self.__newpath, self.__path)
149 # Remove temporary file.
150 os.unlink(self.__newpath)
152 self.__state = self.__STATE['APPLIED']
155 if self.__state != self.__STATE['APPLIED']:
156 raise Error("Attempt to revert configuration from state %s" % self.__state)
158 for child in self.__children:
161 log("Reverting changes to %s configuration" % self.__path)
163 # Remove existing new configuration
164 if os.access(self.__newpath, os.F_OK):
165 os.unlink(self.__newpath)
167 # Revert new configuration.
168 if os.access(self.__path, os.F_OK):
169 os.link(self.__path, self.__newpath)
170 os.unlink(self.__path)
172 # Revert to old configuration.
173 if os.access(self.__oldpath, os.F_OK):
174 os.link(self.__oldpath, self.__path)
175 os.unlink(self.__oldpath)
177 # Leave .*.xapi-new as an aid to debugging.
179 self.__state = self.__STATE['REVERTED']
182 if self.__state != self.__STATE['APPLIED']:
183 raise Error("Attempt to commit configuration from state %s" % self.__state)
185 for child in self.__children:
188 log("Committing changes to %s configuration" % self.__path)
190 if os.access(self.__oldpath, os.F_OK):
191 os.unlink(self.__oldpath)
192 if os.access(self.__newpath, os.F_OK):
193 os.unlink(self.__newpath)
195 self.__state = self.__STATE['COMMITTED']
198 # Helper functions for encoding/decoding database attributes to/from XML.
201 def _str_to_xml(xml, parent, tag, val):
202 e = xml.createElement(tag)
203 parent.appendChild(e)
204 v = xml.createTextNode(val)
206 def _str_from_xml(n):
207 def getText(nodelist):
209 for node in nodelist:
210 if node.nodeType == node.TEXT_NODE:
213 return getText(n.childNodes).strip()
215 def _bool_to_xml(xml, parent, tag, val):
217 _str_to_xml(xml, parent, tag, "True")
219 _str_to_xml(xml, parent, tag, "False")
220 def _bool_from_xml(n):
227 raise Error("Unknown boolean value %s" % s)
229 def _strlist_to_xml(xml, parent, ltag, itag, val):
230 e = xml.createElement(ltag)
231 parent.appendChild(e)
233 c = xml.createElement(itag)
235 cv = xml.createTextNode(v)
237 def _strlist_from_xml(n, ltag, itag):
239 for n in n.childNodes:
240 if n.nodeName == itag:
241 ret.append(_str_from_xml(n))
244 def _map_to_xml(xml, parent, tag, val, attrs):
245 e = xml.createElement(tag)
246 parent.appendChild(e)
247 for n,v in val.items():
249 _str_to_xml(xml, e, n, v)
251 log("Unknown other-config attribute: %s" % n)
253 def _map_from_xml(n, attrs):
255 for n in n.childNodes:
256 if n.nodeName in attrs:
257 ret[n.nodeName] = _str_from_xml(n)
260 def _otherconfig_to_xml(xml, parent, val, attrs):
261 return _map_to_xml(xml, parent, "other_config", val, attrs)
262 def _otherconfig_from_xml(n, attrs):
263 return _map_from_xml(n, attrs)
266 # Definitions of the database objects (and their attributes) used by interface-reconfigure.
268 # Each object is defined by a dictionary mapping an attribute name in
269 # the xapi database to a tuple containing two items:
270 # - a function which takes this attribute and encodes it as XML.
271 # - a function which takes XML and decocdes it into a value.
273 # other-config attributes are specified as a simple array of strings
276 _VLAN_XML_TAG = "vlan"
277 _TUNNEL_XML_TAG = "tunnel"
278 _BOND_XML_TAG = "bond"
279 _NETWORK_XML_TAG = "network"
280 _POOL_XML_TAG = "pool"
282 _ETHTOOL_OTHERCONFIG_ATTRS = ['ethtool-%s' % x for x in 'autoneg', 'speed', 'duplex', 'rx', 'tx', 'sg', 'tso', 'ufo', 'gso' ]
284 _PIF_OTHERCONFIG_ATTRS = [ 'domain', 'peerdns', 'defaultroute', 'mtu', 'static-routes' ] + \
285 [ 'bond-%s' % x for x in 'mode', 'miimon', 'downdelay', 'updelay', 'use_carrier' ] + \
286 _ETHTOOL_OTHERCONFIG_ATTRS
288 _PIF_ATTRS = { 'uuid': (_str_to_xml,_str_from_xml),
289 'management': (_bool_to_xml,_bool_from_xml),
290 'network': (_str_to_xml,_str_from_xml),
291 'device': (_str_to_xml,_str_from_xml),
292 'bond_master_of': (lambda x, p, t, v: _strlist_to_xml(x, p, 'bond_master_of', 'slave', v),
293 lambda n: _strlist_from_xml(n, 'bond_master_of', 'slave')),
294 'bond_slave_of': (_str_to_xml,_str_from_xml),
295 'VLAN': (_str_to_xml,_str_from_xml),
296 'VLAN_master_of': (_str_to_xml,_str_from_xml),
297 'VLAN_slave_of': (lambda x, p, t, v: _strlist_to_xml(x, p, 'VLAN_slave_of', 'master', v),
298 lambda n: _strlist_from_xml(n, 'VLAN_slave_Of', 'master')),
299 'tunnel_access_PIF_of': (lambda x, p, t, v: _strlist_to_xml(x, p, 'tunnel_access_PIF_of', 'pif', v),
300 lambda n: _strlist_from_xml(n, 'tunnel_access_PIF_of', 'pif')),
301 'tunnel_transport_PIF_of': (lambda x, p, t, v: _strlist_to_xml(x, p, 'tunnel_transport_PIF_of', 'pif', v),
302 lambda n: _strlist_from_xml(n, 'tunnel_transport_PIF_of', 'pif')),
303 'ip_configuration_mode': (_str_to_xml,_str_from_xml),
304 'IP': (_str_to_xml,_str_from_xml),
305 'netmask': (_str_to_xml,_str_from_xml),
306 'gateway': (_str_to_xml,_str_from_xml),
307 'DNS': (_str_to_xml,_str_from_xml),
308 'MAC': (_str_to_xml,_str_from_xml),
309 'other_config': (lambda x, p, t, v: _otherconfig_to_xml(x, p, v, _PIF_OTHERCONFIG_ATTRS),
310 lambda n: _otherconfig_from_xml(n, _PIF_OTHERCONFIG_ATTRS)),
312 # Special case: We write the current value
313 # PIF.currently-attached to the cache but since it will
314 # not be valid when we come to use the cache later
315 # (i.e. after a reboot) we always read it as False.
316 'currently_attached': (_bool_to_xml, lambda n: False),
319 _VLAN_ATTRS = { 'uuid': (_str_to_xml,_str_from_xml),
320 'tagged_PIF': (_str_to_xml,_str_from_xml),
321 'untagged_PIF': (_str_to_xml,_str_from_xml),
324 _TUNNEL_ATTRS = { 'uuid': (_str_to_xml,_str_from_xml),
325 'access_PIF': (_str_to_xml,_str_from_xml),
326 'transport_PIF': (_str_to_xml,_str_from_xml),
328 _BOND_ATTRS = { 'uuid': (_str_to_xml,_str_from_xml),
329 'master': (_str_to_xml,_str_from_xml),
330 'slaves': (lambda x, p, t, v: _strlist_to_xml(x, p, 'slaves', 'slave', v),
331 lambda n: _strlist_from_xml(n, 'slaves', 'slave')),
334 _NETWORK_OTHERCONFIG_ATTRS = [ 'mtu', 'static-routes' ] + _ETHTOOL_OTHERCONFIG_ATTRS
336 _NETWORK_ATTRS = { 'uuid': (_str_to_xml,_str_from_xml),
337 'bridge': (_str_to_xml,_str_from_xml),
338 'MTU': (_str_to_xml,_str_from_xml),
339 'PIFs': (lambda x, p, t, v: _strlist_to_xml(x, p, 'PIFs', 'PIF', v),
340 lambda n: _strlist_from_xml(n, 'PIFs', 'PIF')),
341 'other_config': (lambda x, p, t, v: _otherconfig_to_xml(x, p, v, _NETWORK_OTHERCONFIG_ATTRS),
342 lambda n: _otherconfig_from_xml(n, _NETWORK_OTHERCONFIG_ATTRS)),
345 _POOL_OTHERCONFIG_ATTRS = ['vswitch-controller-fail-mode']
347 _POOL_ATTRS = { 'other_config': (lambda x, p, t, v: _otherconfig_to_xml(x, p, v, _POOL_OTHERCONFIG_ATTRS),
348 lambda n: _otherconfig_from_xml(n, _POOL_OTHERCONFIG_ATTRS)),
352 # Database Cache object
358 assert(_db is not None)
361 def db_init_from_cache(cache):
364 _db = DatabaseCache(cache_file=cache)
366 def db_init_from_xenapi(session):
369 _db = DatabaseCache(session_ref=session)
371 class DatabaseCache(object):
372 def __read_xensource_inventory(self):
373 filename = root_prefix() + "/etc/xensource-inventory"
374 f = open(filename, "r")
375 lines = [x.strip("\n") for x in f.readlines()]
378 defs = [ (l[:l.find("=")], l[(l.find("=") + 1):]) for l in lines ]
379 defs = [ (a, b.strip("'")) for (a,b) in defs ]
383 def __pif_on_host(self,pif):
384 return self.__pifs.has_key(pif)
386 def __get_pif_records_from_xapi(self, session, host):
388 for (p,rec) in session.xenapi.PIF.get_all_records().items():
389 if rec['host'] != host:
393 if f in [ "tunnel_access_PIF_of", "tunnel_transport_PIF_of" ] and f not in rec:
394 # XenServer 5.5 network records did not have
395 # these fields, so allow them to be missing.
398 self.__pifs[p][f] = rec[f]
399 self.__pifs[p]['other_config'] = {}
400 for f in _PIF_OTHERCONFIG_ATTRS:
401 if not rec['other_config'].has_key(f): continue
402 self.__pifs[p]['other_config'][f] = rec['other_config'][f]
404 def __get_vlan_records_from_xapi(self, session):
406 for v in session.xenapi.VLAN.get_all():
407 rec = session.xenapi.VLAN.get_record(v)
408 if not self.__pif_on_host(rec['untagged_PIF']):
411 for f in _VLAN_ATTRS:
412 self.__vlans[v][f] = rec[f]
414 def __get_tunnel_records_from_xapi(self, session):
416 for t in session.xenapi.tunnel.get_all():
417 rec = session.xenapi.tunnel.get_record(t)
418 if not self.__pif_on_host(rec['transport_PIF']):
420 self.__tunnels[t] = {}
421 for f in _TUNNEL_ATTRS:
422 self.__tunnels[t][f] = rec[f]
424 def __get_bond_records_from_xapi(self, session):
426 for b in session.xenapi.Bond.get_all():
427 rec = session.xenapi.Bond.get_record(b)
428 if not self.__pif_on_host(rec['master']):
431 for f in _BOND_ATTRS:
432 self.__bonds[b][f] = rec[f]
434 def __get_network_records_from_xapi(self, session):
436 for n in session.xenapi.network.get_all():
437 rec = session.xenapi.network.get_record(n)
438 self.__networks[n] = {}
439 for f in _NETWORK_ATTRS:
441 # drop PIFs on other hosts
442 self.__networks[n][f] = [p for p in rec[f] if self.__pif_on_host(p)]
443 elif f == "MTU" and f not in rec:
444 # XenServer 5.5 network records did not have an
445 # MTU field, so allow this to be missing.
448 self.__networks[n][f] = rec[f]
449 self.__networks[n]['other_config'] = {}
450 for f in _NETWORK_OTHERCONFIG_ATTRS:
451 if not rec['other_config'].has_key(f): continue
452 self.__networks[n]['other_config'][f] = rec['other_config'][f]
454 def __get_pool_records_from_xapi(self, session):
456 for p in session.xenapi.pool.get_all():
457 rec = session.xenapi.pool.get_record(p)
461 for f in _POOL_ATTRS:
462 self.__pools[p][f] = rec[f]
464 for f in _POOL_OTHERCONFIG_ATTRS:
465 if rec['other_config'].has_key(f):
466 self.__pools[p]['other_config'][f] = rec['other_config'][f]
468 def __to_xml(self, xml, parent, key, ref, rec, attrs):
469 """Encode a database object as XML"""
470 e = xml.createElement(key)
471 parent.appendChild(e)
473 e.setAttribute('ref', ref)
475 for n,v in rec.items():
480 raise Error("Unknown attribute %s" % n)
481 def __from_xml(self, e, attrs):
482 """Decode a database object from XML"""
483 ref = e.attributes['ref'].value
485 for n in e.childNodes:
486 if n.nodeName in attrs:
487 _,h = attrs[n.nodeName]
488 rec[n.nodeName] = h(n)
491 def __init__(self, session_ref=None, cache_file=None):
492 if session_ref and cache_file:
493 raise Error("can't specify session reference and cache file")
494 if cache_file == None:
496 session = XenAPI.xapi_local()
499 log("No session ref given on command line, logging in.")
500 session.xenapi.login_with_password("root", "")
502 session._session = session_ref
506 inventory = self.__read_xensource_inventory()
507 assert(inventory.has_key('INSTALLATION_UUID'))
508 log("host uuid is %s" % inventory['INSTALLATION_UUID'])
510 host = session.xenapi.host.get_by_uuid(inventory['INSTALLATION_UUID'])
512 self.__get_pif_records_from_xapi(session, host)
515 self.__get_tunnel_records_from_xapi(session)
516 except XenAPI.Failure, e:
517 error,details = e.details
518 if error == "MESSAGE_METHOD_UNKNOWN" and details == "tunnel.get_all":
521 self.__get_pool_records_from_xapi(session)
522 self.__get_vlan_records_from_xapi(session)
523 self.__get_bond_records_from_xapi(session)
524 self.__get_network_records_from_xapi(session)
527 session.xenapi.session.logout()
529 log("Loading xapi database cache from %s" % cache_file)
531 xml = parseXML(root_prefix() + cache_file)
540 assert(len(xml.childNodes) == 1)
541 toplevel = xml.childNodes[0]
543 assert(toplevel.nodeName == "xenserver-network-configuration")
545 for n in toplevel.childNodes:
546 if n.nodeName == "#text":
548 elif n.nodeName == _PIF_XML_TAG:
549 (ref,rec) = self.__from_xml(n, _PIF_ATTRS)
550 self.__pifs[ref] = rec
551 elif n.nodeName == _BOND_XML_TAG:
552 (ref,rec) = self.__from_xml(n, _BOND_ATTRS)
553 self.__bonds[ref] = rec
554 elif n.nodeName == _VLAN_XML_TAG:
555 (ref,rec) = self.__from_xml(n, _VLAN_ATTRS)
556 self.__vlans[ref] = rec
557 elif n.nodeName == _TUNNEL_XML_TAG:
558 (ref,rec) = self.__from_xml(n, _TUNNEL_ATTRS)
559 self.__vlans[ref] = rec
560 elif n.nodeName == _NETWORK_XML_TAG:
561 (ref,rec) = self.__from_xml(n, _NETWORK_ATTRS)
562 self.__networks[ref] = rec
563 elif n.nodeName == _POOL_XML_TAG:
564 (ref,rec) = self.__from_xml(n, _POOL_ATTRS)
565 self.__pools[ref] = rec
567 raise Error("Unknown XML element %s" % n.nodeName)
569 def save(self, cache_file):
571 xml = getDOMImplementation().createDocument(
572 None, "xenserver-network-configuration", None)
573 for (ref,rec) in self.__pifs.items():
574 self.__to_xml(xml, xml.documentElement, _PIF_XML_TAG, ref, rec, _PIF_ATTRS)
575 for (ref,rec) in self.__bonds.items():
576 self.__to_xml(xml, xml.documentElement, _BOND_XML_TAG, ref, rec, _BOND_ATTRS)
577 for (ref,rec) in self.__vlans.items():
578 self.__to_xml(xml, xml.documentElement, _VLAN_XML_TAG, ref, rec, _VLAN_ATTRS)
579 for (ref,rec) in self.__tunnels.items():
580 self.__to_xml(xml, xml.documentElement, _TUNNEL_XML_TAG, ref, rec, _TUNNEL_ATTRS)
581 for (ref,rec) in self.__networks.items():
582 self.__to_xml(xml, xml.documentElement, _NETWORK_XML_TAG, ref, rec,
584 for (ref,rec) in self.__pools.items():
585 self.__to_xml(xml, xml.documentElement, _POOL_XML_TAG, ref, rec, _POOL_ATTRS)
587 f = open(cache_file, 'w')
588 f.write(xml.toprettyxml())
591 def get_pif_by_uuid(self, uuid):
592 pifs = map(lambda (ref,rec): ref,
593 filter(lambda (ref,rec): uuid == rec['uuid'],
594 self.__pifs.items()))
596 raise Error("Unknown PIF \"%s\"" % uuid)
598 raise Error("Non-unique PIF \"%s\"" % uuid)
602 def get_pifs_by_device(self, device):
603 return map(lambda (ref,rec): ref,
604 filter(lambda (ref,rec): rec['device'] == device,
605 self.__pifs.items()))
607 def get_pif_by_bridge(self, bridge):
608 networks = map(lambda (ref,rec): ref,
609 filter(lambda (ref,rec): rec['bridge'] == bridge,
610 self.__networks.items()))
611 if len(networks) == 0:
612 raise Error("No matching network \"%s\"" % bridge)
615 for network in networks:
616 nwrec = self.get_network_record(network)
617 for pif in nwrec['PIFs']:
618 pifrec = self.get_pif_record(pif)
620 raise Error("Multiple PIFs on host for network %s" % (bridge))
623 raise Error("No PIF on host for network %s" % (bridge))
626 def get_pif_record(self, pif):
627 if self.__pifs.has_key(pif):
628 return self.__pifs[pif]
629 raise Error("Unknown PIF \"%s\"" % pif)
630 def get_all_pifs(self):
632 def pif_exists(self, pif):
633 return self.__pifs.has_key(pif)
635 def get_management_pif(self):
636 """ Returns the management pif on host
638 all = self.get_all_pifs()
640 pifrec = self.get_pif_record(pif)
641 if pifrec['management']: return pif
644 def get_network_record(self, network):
645 if self.__networks.has_key(network):
646 return self.__networks[network]
647 raise Error("Unknown network \"%s\"" % network)
649 def get_bond_record(self, bond):
650 if self.__bonds.has_key(bond):
651 return self.__bonds[bond]
655 def get_vlan_record(self, vlan):
656 if self.__vlans.has_key(vlan):
657 return self.__vlans[vlan]
661 def get_pool_record(self):
662 return self.__pools.values()[0]
668 def ethtool_settings(oc):
670 if oc.has_key('ethtool-speed'):
671 val = oc['ethtool-speed']
672 if val in ["10", "100", "1000"]:
673 settings += ['speed', val]
675 log("Invalid value for ethtool-speed = %s. Must be 10|100|1000." % val)
676 if oc.has_key('ethtool-duplex'):
677 val = oc['ethtool-duplex']
678 if val in ["10", "100", "1000"]:
679 settings += ['duplex', 'val']
681 log("Invalid value for ethtool-duplex = %s. Must be half|full." % val)
682 if oc.has_key('ethtool-autoneg'):
683 val = oc['ethtool-autoneg']
684 if val in ["true", "on"]:
685 settings += ['autoneg', 'on']
686 elif val in ["false", "off"]:
687 settings += ['autoneg', 'off']
689 log("Invalid value for ethtool-autoneg = %s. Must be on|true|off|false." % val)
691 for opt in ("rx", "tx", "sg", "tso", "ufo", "gso"):
692 if oc.has_key("ethtool-" + opt):
693 val = oc["ethtool-" + opt]
694 if val in ["true", "on"]:
695 offload += [opt, 'on']
696 elif val in ["false", "off"]:
697 offload += [opt, 'off']
699 log("Invalid value for ethtool-%s = %s. Must be on|true|off|false." % (opt, val))
700 return settings,offload
702 # By default the MTU is taken from the Network.MTU setting for VIF,
703 # PIF and Bridge. However it is possible to override this by using
704 # {VIF,PIF,Network}.other-config:mtu.
706 # type parameter is a string describing the object that the oc parameter
707 # is from. e.g. "PIF", "Network"
708 def mtu_setting(nw, type, oc):
711 nwrec = db().get_network_record(nw)
712 if nwrec.has_key('MTU'):
717 if oc.has_key('mtu'):
718 log("Override Network.MTU setting on bridge %s from %s.MTU is %s" % \
719 (nwrec['bridge'], type, mtu))
724 int(mtu) # Check that the value is an integer
726 except ValueError, x:
727 log("Invalid value for mtu = %s" % mtu)
732 # IP Network Devices -- network devices with IP configuration
734 def pif_ipdev_name(pif):
735 """Return the ipdev name associated with pif"""
736 pifrec = db().get_pif_record(pif)
737 nwrec = db().get_network_record(pifrec['network'])
740 # TODO: sanity check that nwrec['bridgeless'] != 'true'
741 return nwrec['bridge']
743 # TODO: sanity check that nwrec['bridgeless'] == 'true'
744 return pif_netdev_name(pif)
747 # Bare Network Devices -- network devices without IP configuration
750 def netdev_exists(netdev):
751 return os.path.exists(root_prefix() + "/sys/class/net/" + netdev)
753 def pif_netdev_name(pif):
754 """Get the netdev name for a PIF."""
756 pifrec = db().get_pif_record(pif)
759 return "%(device)s.%(VLAN)s" % pifrec
761 return pifrec['device']
767 def pif_is_bridged(pif):
768 pifrec = db().get_pif_record(pif)
769 nwrec = db().get_network_record(pifrec['network'])
772 # TODO: sanity check that nwrec['bridgeless'] != 'true'
775 # TODO: sanity check that nwrec['bridgeless'] == 'true'
778 def pif_bridge_name(pif):
779 """Return the bridge name of a pif.
781 PIF must be a bridged PIF."""
782 pifrec = db().get_pif_record(pif)
784 nwrec = db().get_network_record(pifrec['network'])
787 return nwrec['bridge']
789 raise Error("PIF %(uuid)s does not have a bridge name" % pifrec)
794 def pif_is_bond(pif):
795 pifrec = db().get_pif_record(pif)
797 return len(pifrec['bond_master_of']) > 0
799 def pif_get_bond_masters(pif):
800 """Returns a list of PIFs which are bond masters of this PIF"""
802 pifrec = db().get_pif_record(pif)
804 bso = pifrec['bond_slave_of']
806 # bond-slave-of is currently a single reference but in principle a
807 # PIF could be a member of several bonds which are not
808 # concurrently attached. Be robust to this possibility.
809 if not bso or bso == "OpaqueRef:NULL":
811 elif not type(bso) == list:
814 bondrecs = [db().get_bond_record(bond) for bond in bso]
815 bondrecs = [rec for rec in bondrecs if rec]
817 return [bond['master'] for bond in bondrecs]
819 def pif_get_bond_slaves(pif):
820 """Returns a list of PIFs which make up the given bonded pif."""
822 pifrec = db().get_pif_record(pif)
824 bmo = pifrec['bond_master_of']
826 raise Error("Bond-master-of contains too many elements")
831 bondrec = db().get_bond_record(bmo[0])
833 raise Error("No bond record for bond master PIF")
835 return bondrec['slaves']
841 def pif_is_vlan(pif):
842 return db().get_pif_record(pif)['VLAN'] != '-1'
844 def pif_get_vlan_slave(pif):
845 """Find the PIF which is the VLAN slave of pif.
847 Returns the 'physical' PIF underneath the a VLAN PIF @pif."""
849 pifrec = db().get_pif_record(pif)
851 vlan = pifrec['VLAN_master_of']
852 if not vlan or vlan == "OpaqueRef:NULL":
853 raise Error("PIF is not a VLAN master")
855 vlanrec = db().get_vlan_record(vlan)
857 raise Error("No VLAN record found for PIF")
859 return vlanrec['tagged_PIF']
861 def pif_get_vlan_masters(pif):
862 """Returns a list of PIFs which are VLANs on top of the given pif."""
864 pifrec = db().get_pif_record(pif)
865 vlans = [db().get_vlan_record(v) for v in pifrec['VLAN_slave_of']]
866 return [v['untagged_PIF'] for v in vlans if v and db().pif_exists(v['untagged_PIF'])]
871 def pif_is_tunnel(pif):
872 rec = db().get_pif_record(pif)
873 return rec.has_key('tunnel_access_PIF_of') and len(rec['tunnel_access_PIF_of']) > 0
876 # Datapath base class
879 class Datapath(object):
880 """Object encapsulating the actions necessary to (de)configure the
881 datapath for a given PIF. Does not include configuration of the
882 IP address on the ipdev.
885 def __init__(self, pif):
890 """Class method called when write action is called. Can be used
891 to update any backend specific configuration."""
894 def configure_ipdev(self, cfg):
895 """Write ifcfg TYPE field for an IPdev, plus any type specific
898 raise NotImplementedError
900 def preconfigure(self, parent):
901 """Prepare datapath configuration for PIF, but do not actually
904 Any configuration files should be attached to parent.
906 raise NotImplementedError
908 def bring_down_existing(self):
909 """Tear down any existing network device configuration which
910 needs to be undone in order to bring this PIF up.
912 raise NotImplementedError
915 """Apply the configuration prepared in the preconfigure stage.
917 Should assume any configuration files changed attached in
918 the preconfigure stage are applied and bring up the
919 necesary devices to provide the datapath for the
922 Should not bring up the IPdev.
924 raise NotImplementedError
927 """Called after the IPdev has been brought up.
929 Should do any final setup, including reinstating any
930 devices which were taken down in the bring_down_existing
933 raise NotImplementedError
935 def bring_down(self):
936 """Tear down and deconfigure the datapath. Should assume the
937 IPdev has already been brought down.
939 raise NotImplementedError
941 def DatapathFactory():
942 # XXX Need a datapath object for bridgeless PIFs
945 network_conf = open(root_prefix() + "/etc/xensource/network.conf", 'r')
946 network_backend = network_conf.readline().strip()
949 raise Error("failed to determine network backend:" + e)
951 if network_backend == "bridge":
952 from InterfaceReconfigureBridge import DatapathBridge
953 return DatapathBridge
954 elif network_backend in ["openvswitch", "vswitch"]:
955 from InterfaceReconfigureVswitch import DatapathVswitch
956 return DatapathVswitch
958 raise Error("unknown network backend %s" % network_backend)