[mirror_ifupdown2.git] / pkg / scheduler.py

#!/usr/bin/python
#
# Copyright 2013.  Cumulus Networks, Inc.
# Author: Roopa Prabhu, roopa@cumulusnetworks.com
#
# ifaceScheduler --
#    interface scheduler
#

from statemanager import *
from iface import *
from graph import *
from collections import deque
from collections import OrderedDict
import logging
import traceback
import sys
from graph import *
from collections import deque
from threading import *
from ifupdownbase import *

class ifaceSchedulerFlags():
    INORDER = 0x1
    POSTORDER = 0x2

class ifaceScheduler():
    """ scheduler functions to schedule configuration of interfaces.

    supports scheduling of interfaces serially in plain interface list
    or dependency graph format.

    Algo:
        - run topological sort on the iface objects
        - In the sorted iface object list, pick up interfaces with no parents
        and run ops on them and their children. 
        - If operation is up and user gave interface list (ie not all)
        option, also see if there were upper-devices and run ops on them. 
        - if operation is down, dont down the interface if it still
        has upperifaces present. The down operation is executed when the
        last upperiface goes away. If force option is set, this rule does not
        apply.
        - run ops calls addon modules run operation passing the iface
        object and op to each module.
        - ops are [pre-up, up, post-up, pre-down, down,
                   post-down, query-running, query-check]
    """

    _STATE_CHECK = True

    @classmethod
    def run_iface_op(cls, ifupdownobj, ifaceobj, op, cenv=None):
        """ Runs sub operation on an interface """
        ifacename = ifaceobj.name

        if (cls._STATE_CHECK and
            (ifaceobj.state >= ifaceState.from_str(op)) and
            (ifaceobj.status == ifaceStatus.SUCCESS)):
            ifupdownobj.logger.debug('%s: already in state %s' %(ifacename, op))
            return
        if not ifupdownobj.ADDONS_ENABLE: return
        if op == 'query-checkcurr':
            query_ifaceobj=ifupdownobj.create_n_save_ifaceobjcurr(ifaceobj)
        for mname in ifupdownobj.module_ops.get(op):
            m = ifupdownobj.modules.get(mname)
            err = 0
            try:
                if hasattr(m, 'run'):
                    msg = ('%s: %s : running module %s' %(ifacename, op, mname))
                    if op == 'query-checkcurr':
                        # Dont check curr if the interface object was 
                        # auto generated
                        if (ifaceobj.priv_flags & ifupdownobj.NOCONFIG):
                            continue
                        ifupdownobj.logger.debug(msg)
                        m.run(ifaceobj, op, query_ifaceobj)
                    else:
                        ifupdownobj.logger.debug(msg)
                        m.run(ifaceobj, op)
            except Exception, e:
                err = 1
                ifupdownobj.log_error(str(e))
            finally:
                if err:
                    ifaceobj.set_state_n_status(ifaceState.from_str(op),
                                                ifaceStatus.ERROR)
                else:
                    ifaceobj.set_state_n_status(ifaceState.from_str(op),
                                                ifaceStatus.SUCCESS)

        if ifupdownobj.COMPAT_EXEC_SCRIPTS:
            # execute /etc/network/ scripts 
            for mname in ifupdownobj.script_ops.get(op, []):
                ifupdownobj.logger.debug('%s: %s : running script %s'
                    %(ifacename, op, mname))
                try:
                    ifupdownobj.exec_command(mname, cmdenv=cenv)
                except Exception, e:
                    ifupdownobj.log_error(str(e))

    @classmethod
    def run_iface_list_ops(cls, ifupdownobj, ifaceobjs, ops):
        """ Runs all operations on a list of interface
            configurations for the same interface
        """
        # minor optimization. If operation is 'down', proceed only
        # if interface exists in the system
        ifacename = ifaceobjs[0].name
        if ('down' in ops[0] and
                not ifupdownobj.link_exists(ifacename)):
            ifupdownobj.logger.debug('%s: does not exist' %ifacename)
            # run posthook before you get out of here, so that
            # appropriate cleanup is done
            posthookfunc = ifupdownobj.sched_hooks.get('posthook')
            if posthookfunc:
                for ifaceobj in ifaceobjs:
                    ifaceobj.status = ifaceStatus.SUCCESS
                    posthookfunc(ifupdownobj, ifaceobj, 'down')
            return 
        for op in ops:
            # first run ifupdownobj handlers. This is good enough
            # for the first object in the list
            handler = ifupdownobj.ops_handlers.get(op)
            if handler:
                if (not ifaceobjs[0].addr_method or
                    (ifaceobjs[0].addr_method and
                    ifaceobjs[0].addr_method != 'manual')):
                    handler(ifupdownobj, ifaceobjs[0])
            for ifaceobj in ifaceobjs:
                cls.run_iface_op(ifupdownobj, ifaceobj, op,
                    cenv=ifupdownobj.generate_running_env(ifaceobj, op)
                        if ifupdownobj.COMPAT_EXEC_SCRIPTS else None) 
                posthookfunc = ifupdownobj.sched_hooks.get('posthook')
                if posthookfunc:
                    posthookfunc(ifupdownobj, ifaceobj, op)

    @classmethod
    def _check_upperifaces(cls, ifupdownobj, ifaceobj, ops, parent,
                           followdependents=False):
        """ Check if upperifaces are hanging off us and help caller decide
        if he can proceed with the ops on this device

        Returns True or False indicating the caller to proceed with the
        operation.
        """
        # proceed only for down operation
        if 'down' not in ops[0]:
            return True

        if (ifupdownobj.FORCE or
                not ifupdownobj.ADDONS_ENABLE or
                (not ifupdownobj.is_ifaceobj_noconfig(ifaceobj) and
                ifupdownobj.config.get('warn_on_ifdown', '0') == '0' and
                not ifupdownobj.ALL)):
            return True

        ulist = ifaceobj.upperifaces
        if not ulist:
            return True

        # Get the list of upper ifaces other than the parent
        tmpulist = ([u for u in ulist if u != parent] if parent
                    else ulist)
        if not tmpulist:
            return True
        # XXX: This is expensive. Find a cheaper way to do this.
        # if any of the upperdevs are present,
        # return false to the caller to skip this interface
        for u in tmpulist:
            if ifupdownobj.link_exists(u):
                if not ifupdownobj.ALL:
                    if ifupdownobj.is_ifaceobj_noconfig(ifaceobj):
                        ifupdownobj.logger.info('%s: skipping interface down,'
                            %ifaceobj.name + ' upperiface %s still around ' %u)
                    else:
                        ifupdownobj.logger.warn('%s: skipping interface down,'
                            %ifaceobj.name + ' upperiface %s still around ' %u)
                return False
        return True

    @classmethod
    def run_iface_graph(cls, ifupdownobj, ifacename, ops, parent=None,
                        order=ifaceSchedulerFlags.POSTORDER,
                        followdependents=True):
        """ runs interface by traversing all nodes rooted at itself """

        # Each ifacename can have a list of iface objects
        ifaceobjs = ifupdownobj.get_ifaceobjs(ifacename)
        if not ifaceobjs:
            raise Exception('%s: not found' %ifacename)

        for ifaceobj in ifaceobjs:
            if not cls._check_upperifaces(ifupdownobj, ifaceobj,
                                          ops, parent, followdependents):
                return

        # If inorder, run the iface first and then its dependents
        if order == ifaceSchedulerFlags.INORDER:
            cls.run_iface_list_ops(ifupdownobj, ifaceobjs, ops)

        for ifaceobj in ifaceobjs:
            # Run lowerifaces or dependents
            dlist = ifaceobj.lowerifaces
            if dlist:
                ifupdownobj.logger.debug('%s: found dependents %s'
                            %(ifacename, str(dlist)))
                try:
                    if not followdependents:
                        # XXX: this is yet another extra step,
                        # but is needed for interfaces that are
                        # implicit dependents. even though we are asked to
                        # not follow dependents, we must follow the ones
                        # that dont have user given config. Because we own them
                        new_dlist = [d for d in dlist
                                    if ifupdownobj.is_iface_noconfig(d)]
                        if new_dlist:
                            cls.run_iface_list(ifupdownobj, new_dlist, ops,
                                           ifacename, order, followdependents,
                                           continueonfailure=False)
                    else:
                        cls.run_iface_list(ifupdownobj, dlist, ops,
                                            ifacename, order,
                                            followdependents,
                                            continueonfailure=False)
                except Exception, e:
                    if (ifupdownobj.ignore_error(str(e))):
                        pass
                    else:
                        # Dont bring the iface up if children did not come up
                        ifaceobj.set_state_n_status(ifaceState.NEW,
                                                ifaceStatus.ERROR)
                        raise
        if order == ifaceSchedulerFlags.POSTORDER:
            cls.run_iface_list_ops(ifupdownobj, ifaceobjs, ops)

    @classmethod
    def run_iface_list(cls, ifupdownobj, ifacenames,
                       ops, parent=None, order=ifaceSchedulerFlags.POSTORDER,
                       followdependents=True, continueonfailure=True):
        """ Runs interface list """

        for ifacename in ifacenames:
            try:
              cls.run_iface_graph(ifupdownobj, ifacename, ops, parent,
                      order, followdependents)
            except Exception, e:
                if continueonfailure:
                    if ifupdownobj.logger.isEnabledFor(logging.DEBUG):
                        traceback.print_tb(sys.exc_info()[2])
                    ifupdownobj.logger.error('%s : %s' %(ifacename, str(e)))
                    pass
                else:
                    if (ifupdownobj.ignore_error(str(e))):
                        pass
                    else:
                        raise Exception('%s : (%s)' %(ifacename, str(e)))

    @classmethod
    def run_iface_graph_upper(cls, ifupdownobj, ifacename, ops, parent=None,
                        followdependents=True, skip_root=False):
        """ runs interface by traversing all nodes rooted at itself """

        # Each ifacename can have a list of iface objects
        ifaceobjs = ifupdownobj.get_ifaceobjs(ifacename)
        if not ifaceobjs:
            raise Exception('%s: not found' %ifacename)

        if not skip_root:
            # run the iface first and then its upperifaces
            cls.run_iface_list_ops(ifupdownobj, ifaceobjs, ops)
        for ifaceobj in ifaceobjs:
            # Run upperifaces
            ulist = ifaceobj.upperifaces
            if ulist:
                ifupdownobj.logger.debug('%s: found upperifaces %s'
                                            %(ifacename, str(ulist)))
                try:
                    cls.run_iface_list_upper(ifupdownobj, ulist, ops,
                                            ifacename,
                                            followdependents,
                                            continueonfailure=True)
                except Exception, e:
                    if (ifupdownobj.ignore_error(str(e))):
                        pass
                    else:
                        raise

    @classmethod
    def run_iface_list_upper(cls, ifupdownobj, ifacenames,
                       ops, parent=None, followdependents=True,
                       continueonfailure=True, skip_root=False):
        """ Runs interface list """

        for ifacename in ifacenames:
            try:
              cls.run_iface_graph_upper(ifupdownobj, ifacename, ops, parent,
                      followdependents, skip_root)
            except Exception, e:
                if continueonfailure:
                    if ifupdownobj.logger.isEnabledFor(logging.DEBUG):
                        traceback.print_tb(sys.exc_info()[2])
                    ifupdownobj.logger.error('%s : %s' %(ifacename, str(e)))
                    pass
                else:
                    if (ifupdownobj.ignore_error(str(e))):
                        pass
                    else:
                        raise Exception('%s : (%s)' %(ifacename, str(e)))

    @classmethod
    def sched_ifaces(cls, ifupdownobj, ifacenames, ops,
                dependency_graph=None, indegrees=None,
                order=ifaceSchedulerFlags.POSTORDER,
                followdependents=True):
        """ Runs iface dependeny graph by visiting all the nodes
        
        Parameters:
        -----------
        ifupdownobj : ifupdown object (used for getting and updating iface
                                        object state)
        dependency_graph : dependency graph in adjacency list
                            format (contains more than one dependency graph)
        ops : list of operations to perform eg ['pre-up', 'up', 'post-up']

        indegrees : indegree array if present is used to determine roots
                    of the graphs in the dependency_graph
        """

        if not ifupdownobj.ALL or not followdependents or len(ifacenames) == 1:
            # If there is any interface that does exist, maybe it is a
            # logical interface and we have to followupperifaces
            followupperifaces = (True if
                                    [i for i in ifacenames
                                        if not ifupdownobj.link_exists(i)]
                                        else False)
            cls.run_iface_list(ifupdownobj, ifacenames, ops,
                                  parent=None,order=order,
                                  followdependents=followdependents)
            if (not ifupdownobj.ALL and
                    (followdependents or followupperifaces) and
                    'up' in ops[0]):
                # If user had given a set of interfaces to bring up
                # try and execute 'up' on the upperifaces
                ifupdownobj.logger.info('running upperifaces if available')
                cls._STATE_CHECK = False
                cls.run_iface_list_upper(ifupdownobj, ifacenames, ops,
                                         skip_root=True)
                cls._STATE_CHECK = True
            return

        if ifupdownobj.config.get('skip_ifacesort', '0') == '1':
            # This is a backdoor to skip sorting of interfaces, if required
            cls.run_iface_list(ifupdownobj, ifacenames, ops,
                                  parent=None,order=order,
                                  followdependents=followdependents)
            return

        run_queue = []
        # Get a sorted list of all interfaces
        if not indegrees:
            indegrees = OrderedDict()
            for ifacename in dependency_graph.keys():
                indegrees[ifacename] = ifupdownobj.get_iface_refcnt(ifacename)
        sorted_ifacenames = graph.topological_sort_graphs_all(dependency_graph,
                                                          indegrees)
        ifupdownobj.logger.debug('sorted ifacenames %s : '
                                 %str(sorted_ifacenames))

        # From the sorted list, pick interfaces that user asked
        # and those that dont have any dependents first
        [run_queue.append(ifacename)
                    for ifacename in sorted_ifacenames
                        if ifacename in ifacenames and
                        not indegrees.get(ifacename)]

        ifupdownobj.logger.debug('graph roots (interfaces that dont have '
                                 'dependents):' + ' %s' %str(run_queue))
        cls.run_iface_list(ifupdownobj, run_queue, ops,
                                  parent=None,order=order,
                                  followdependents=followdependents)
Commit	Line	Data
a6f80f0e	1	#!/usr/bin/python
3e8ee54f	2	#
	3	# Copyright 2013. Cumulus Networks, Inc.
	4	# Author: Roopa Prabhu, roopa@cumulusnetworks.com
	5	#
	6	# ifaceScheduler --
	7	# interface scheduler
	8	#
a6f80f0e	9
a6f80f0e	10	from statemanager import *
	11	from iface import *
	12	from graph import *
	13	from collections import deque
	14	from collections import OrderedDict
a6f80f0e	15	import logging
d08d5f54	16	import traceback
69f58278	17	import sys
a6f80f0e	18	from graph import *
	19	from collections import deque
	20	from threading import *
	21	from ifupdownbase import *
	22
d08d5f54	23	class ifaceSchedulerFlags():
c798b0f4	24	INORDER = 0x1
c798b0f4	25	POSTORDER = 0x2
d08d5f54	26
be0b20f2	27	class ifaceScheduler():
be0b20f2	28	""" scheduler functions to schedule configuration of interfaces.
a6f80f0e	29
a6f80f0e	30	supports scheduling of interfaces serially in plain interface list
a6f80f0e	31	or dependency graph format.
99b212b0	32
	33	Algo:
	34	- run topological sort on the iface objects
	35	- In the sorted iface object list, pick up interfaces with no parents
	36	and run ops on them and their children.
	37	- If operation is up and user gave interface list (ie not all)
	38	option, also see if there were upper-devices and run ops on them.
	39	- if operation is down, dont down the interface if it still
	40	has upperifaces present. The down operation is executed when the
	41	last upperiface goes away. If force option is set, this rule does not
	42	apply.
	43	- run ops calls addon modules run operation passing the iface
	44	object and op to each module.
	45	- ops are [pre-up, up, post-up, pre-down, down,
	46	post-down, query-running, query-check]
a6f80f0e	47	"""
a6f80f0e	48
c798b0f4	49	_STATE_CHECK = True
c798b0f4	50
be0b20f2	51	@classmethod
44a6ca06	52	def run_iface_op(cls, ifupdownobj, ifaceobj, op, cenv=None):
a6f80f0e	53	""" Runs sub operation on an interface """
62ddec8b	54	ifacename = ifaceobj.name
a6f80f0e	55
c798b0f4	56	if (cls._STATE_CHECK and
62ddec8b	57	(ifaceobj.state >= ifaceState.from_str(op)) and
62ddec8b	58	(ifaceobj.status == ifaceStatus.SUCCESS)):
be0b20f2	59	ifupdownobj.logger.debug('%s: already in state %s' %(ifacename, op))
d08d5f54	60	return
20dd6242	61	if not ifupdownobj.ADDONS_ENABLE: return
44a6ca06 RP	62	if op == 'query-checkcurr':
44a6ca06 RP	63	query_ifaceobj=ifupdownobj.create_n_save_ifaceobjcurr(ifaceobj)
be0b20f2	64	for mname in ifupdownobj.module_ops.get(op):
37c0543d	65	m = ifupdownobj.modules.get(mname)
a6f80f0e	66	err = 0
a6f80f0e	67	try:
d08d5f54	68	if hasattr(m, 'run'):
a690dfae	69	msg = ('%s: %s : running module %s' %(ifacename, op, mname))
739f665b	70	if op == 'query-checkcurr':
d08d5f54	71	# Dont check curr if the interface object was
37c0543d	72	# auto generated
d08d5f54	73	if (ifaceobj.priv_flags & ifupdownobj.NOCONFIG):
37c0543d	74	continue
a690dfae	75	ifupdownobj.logger.debug(msg)
44a6ca06	76	m.run(ifaceobj, op, query_ifaceobj)
a6f80f0e	77	else:
a690dfae	78	ifupdownobj.logger.debug(msg)
d08d5f54	79	m.run(ifaceobj, op)
a6f80f0e	80	except Exception, e:
a6f80f0e	81	err = 1
be0b20f2	82	ifupdownobj.log_error(str(e))
a6f80f0e	83	finally:
31a5f4c3	84	if err:
	85	ifaceobj.set_state_n_status(ifaceState.from_str(op),
	86	ifaceStatus.ERROR)
d08d5f54	87	else:
31a5f4c3	88	ifaceobj.set_state_n_status(ifaceState.from_str(op),
31a5f4c3	89	ifaceStatus.SUCCESS)
6bd7fc74	90
	91	if ifupdownobj.COMPAT_EXEC_SCRIPTS:
	92	# execute /etc/network/ scripts
	93	for mname in ifupdownobj.script_ops.get(op, []):
	94	ifupdownobj.logger.debug('%s: %s : running script %s'
d08d5f54	95	%(ifacename, op, mname))
6bd7fc74	96	try:
	97	ifupdownobj.exec_command(mname, cmdenv=cenv)
	98	except Exception, e:
	99	ifupdownobj.log_error(str(e))
37c0543d	100
be0b20f2	101	@classmethod
923290bd	102	def run_iface_list_ops(cls, ifupdownobj, ifaceobjs, ops):
	103	""" Runs all operations on a list of interface
	104	configurations for the same interface
	105	"""
a690dfae	106	# minor optimization. If operation is 'down', proceed only
a690dfae	107	# if interface exists in the system
923290bd	108	ifacename = ifaceobjs[0].name
	109	if ('down' in ops[0] and
	110	not ifupdownobj.link_exists(ifacename)):
525f0a30	111	ifupdownobj.logger.debug('%s: does not exist' %ifacename)
923290bd	112	# run posthook before you get out of here, so that
	113	# appropriate cleanup is done
	114	posthookfunc = ifupdownobj.sched_hooks.get('posthook')
	115	if posthookfunc:
	116	for ifaceobj in ifaceobjs:
	117	ifaceobj.status = ifaceStatus.SUCCESS
	118	posthookfunc(ifupdownobj, ifaceobj, 'down')
a690dfae	119	return
923290bd	120	for op in ops:
	121	# first run ifupdownobj handlers. This is good enough
	122	# for the first object in the list
	123	handler = ifupdownobj.ops_handlers.get(op)
	124	if handler:
	125	if (not ifaceobjs[0].addr_method or
	126	(ifaceobjs[0].addr_method and
	127	ifaceobjs[0].addr_method != 'manual')):
	128	handler(ifupdownobj, ifaceobjs[0])
	129	for ifaceobj in ifaceobjs:
	130	cls.run_iface_op(ifupdownobj, ifaceobj, op,
923290bd	131	cenv=ifupdownobj.generate_running_env(ifaceobj, op)
	132	if ifupdownobj.COMPAT_EXEC_SCRIPTS else None)
	133	posthookfunc = ifupdownobj.sched_hooks.get('posthook')
	134	if posthookfunc:
	135	posthookfunc(ifupdownobj, ifaceobj, op)
21c7daa7	136
21c7daa7	137	@classmethod
fa3da4be	138	def _check_upperifaces(cls, ifupdownobj, ifaceobj, ops, parent,
fa3da4be	139	followdependents=False):
99b212b0	140	""" Check if upperifaces are hanging off us and help caller decide
99b212b0	141	if he can proceed with the ops on this device
21c7daa7	142
99b212b0	143	Returns True or False indicating the caller to proceed with the
	144	operation.
	145	"""
86fc62e2	146	# proceed only for down operation
	147	if 'down' not in ops[0]:
	148	return True
	149
65c48517	150	if (ifupdownobj.FORCE or
65c48517	151	not ifupdownobj.ADDONS_ENABLE or
86fc62e2	152	(not ifupdownobj.is_ifaceobj_noconfig(ifaceobj) and
33e106da RP	153	ifupdownobj.config.get('warn_on_ifdown', '0') == '0' and
33e106da RP	154	not ifupdownobj.ALL)):
99b212b0	155	return True
65c48517	156
62ddec8b	157	ulist = ifaceobj.upperifaces
99b212b0	158	if not ulist:
99b212b0	159	return True
33e106da	160
99b212b0	161	# Get the list of upper ifaces other than the parent
	162	tmpulist = ([u for u in ulist if u != parent] if parent
	163	else ulist)
	164	if not tmpulist:
	165	return True
	166	# XXX: This is expensive. Find a cheaper way to do this.
	167	# if any of the upperdevs are present,
	168	# return false to the caller to skip this interface
	169	for u in tmpulist:
	170	if ifupdownobj.link_exists(u):
	171	if not ifupdownobj.ALL:
86fc62e2	172	if ifupdownobj.is_ifaceobj_noconfig(ifaceobj):
	173	ifupdownobj.logger.info('%s: skipping interface down,'
	174	%ifaceobj.name + ' upperiface %s still around ' %u)
	175	else:
	176	ifupdownobj.logger.warn('%s: skipping interface down,'
	177	%ifaceobj.name + ' upperiface %s still around ' %u)
99b212b0	178	return False
21c7daa7	179	return True
21c7daa7	180
be0b20f2	181	@classmethod
be0b20f2	182	def run_iface_graph(cls, ifupdownobj, ifacename, ops, parent=None,
d08d5f54	183	order=ifaceSchedulerFlags.POSTORDER,
d08d5f54	184	followdependents=True):
6ef5bfa2	185	""" runs interface by traversing all nodes rooted at itself """
6ef5bfa2	186
d08d5f54	187	# Each ifacename can have a list of iface objects
31a5f4c3	188	ifaceobjs = ifupdownobj.get_ifaceobjs(ifacename)
31a5f4c3	189	if not ifaceobjs:
d08d5f54	190	raise Exception('%s: not found' %ifacename)
a6f80f0e	191
d08d5f54	192	for ifaceobj in ifaceobjs:
ca3f4fc7	193	if not cls._check_upperifaces(ifupdownobj, ifaceobj,
ca3f4fc7	194	ops, parent, followdependents):
21c7daa7	195	return
f3215127	196
923290bd	197	# If inorder, run the iface first and then its dependents
	198	if order == ifaceSchedulerFlags.INORDER:
	199	cls.run_iface_list_ops(ifupdownobj, ifaceobjs, ops)
	200
	201	for ifaceobj in ifaceobjs:
f3215127	202	# Run lowerifaces or dependents
62ddec8b	203	dlist = ifaceobj.lowerifaces
f3215127	204	if dlist:
fa3da4be	205	ifupdownobj.logger.debug('%s: found dependents %s'
fa3da4be	206	%(ifacename, str(dlist)))
d08d5f54	207	try:
	208	if not followdependents:
	209	# XXX: this is yet another extra step,
	210	# but is needed for interfaces that are
f3215127	211	# implicit dependents. even though we are asked to
	212	# not follow dependents, we must follow the ones
	213	# that dont have user given config. Because we own them
d08d5f54	214	new_dlist = [d for d in dlist
923290bd	215	if ifupdownobj.is_iface_noconfig(d)]
6ef5bfa2	216	if new_dlist:
be0b20f2	217	cls.run_iface_list(ifupdownobj, new_dlist, ops,
923290bd	218	ifacename, order, followdependents,
923290bd	219	continueonfailure=False)
d08d5f54	220	else:
be0b20f2	221	cls.run_iface_list(ifupdownobj, dlist, ops,
f3215127	222	ifacename, order,
f3215127	223	followdependents,
6ef5bfa2	224	continueonfailure=False)
d08d5f54	225	except Exception, e:
be0b20f2	226	if (ifupdownobj.ignore_error(str(e))):
d08d5f54	227	pass
	228	else:
	229	# Dont bring the iface up if children did not come up
a690dfae	230	ifaceobj.set_state_n_status(ifaceState.NEW,
923290bd	231	ifaceStatus.ERROR)
d08d5f54	232	raise
923290bd	233	if order == ifaceSchedulerFlags.POSTORDER:
923290bd	234	cls.run_iface_list_ops(ifupdownobj, ifaceobjs, ops)
a6f80f0e	235
be0b20f2	236	@classmethod
be0b20f2	237	def run_iface_list(cls, ifupdownobj, ifacenames,
f3215127	238	ops, parent=None, order=ifaceSchedulerFlags.POSTORDER,
6ef5bfa2	239	followdependents=True, continueonfailure=True):
d08d5f54	240	""" Runs interface list """
a6f80f0e	241
d08d5f54	242	for ifacename in ifacenames:
a6f80f0e	243	try:
be0b20f2	244	cls.run_iface_graph(ifupdownobj, ifacename, ops, parent,
d08d5f54	245	order, followdependents)
a6f80f0e	246	except Exception, e:
6ef5bfa2	247	if continueonfailure:
69f58278	248	if ifupdownobj.logger.isEnabledFor(logging.DEBUG):
69f58278	249	traceback.print_tb(sys.exc_info()[2])
be0b20f2	250	ifupdownobj.logger.error('%s : %s' %(ifacename, str(e)))
d08d5f54	251	pass
d08d5f54	252	else:
be0b20f2	253	if (ifupdownobj.ignore_error(str(e))):
6ef5bfa2	254	pass
6ef5bfa2	255	else:
9dce3561	256	raise Exception('%s : (%s)' %(ifacename, str(e)))
d08d5f54	257
be0b20f2	258	@classmethod
c798b0f4	259	def run_iface_graph_upper(cls, ifupdownobj, ifacename, ops, parent=None,
	260	followdependents=True, skip_root=False):
	261	""" runs interface by traversing all nodes rooted at itself """
	262
	263	# Each ifacename can have a list of iface objects
	264	ifaceobjs = ifupdownobj.get_ifaceobjs(ifacename)
	265	if not ifaceobjs:
	266	raise Exception('%s: not found' %ifacename)
	267
923290bd	268	if not skip_root:
	269	# run the iface first and then its upperifaces
	270	cls.run_iface_list_ops(ifupdownobj, ifaceobjs, ops)
c798b0f4	271	for ifaceobj in ifaceobjs:
c798b0f4	272	# Run upperifaces
62ddec8b	273	ulist = ifaceobj.upperifaces
c798b0f4	274	if ulist:
fa3da4be	275	ifupdownobj.logger.debug('%s: found upperifaces %s'
fa3da4be	276	%(ifacename, str(ulist)))
c798b0f4	277	try:
	278	cls.run_iface_list_upper(ifupdownobj, ulist, ops,
	279	ifacename,
	280	followdependents,
	281	continueonfailure=True)
	282	except Exception, e:
	283	if (ifupdownobj.ignore_error(str(e))):
	284	pass
	285	else:
	286	raise
	287
	288	@classmethod
	289	def run_iface_list_upper(cls, ifupdownobj, ifacenames,
	290	ops, parent=None, followdependents=True,
	291	continueonfailure=True, skip_root=False):
	292	""" Runs interface list """
	293
	294	for ifacename in ifacenames:
	295	try:
	296	cls.run_iface_graph_upper(ifupdownobj, ifacename, ops, parent,
	297	followdependents, skip_root)
	298	except Exception, e:
	299	if continueonfailure:
	300	if ifupdownobj.logger.isEnabledFor(logging.DEBUG):
	301	traceback.print_tb(sys.exc_info()[2])
	302	ifupdownobj.logger.error('%s : %s' %(ifacename, str(e)))
	303	pass
	304	else:
	305	if (ifupdownobj.ignore_error(str(e))):
	306	pass
	307	else:
9dce3561	308	raise Exception('%s : (%s)' %(ifacename, str(e)))
c798b0f4	309
	310	@classmethod
	311	def sched_ifaces(cls, ifupdownobj, ifacenames, ops,
	312	dependency_graph=None, indegrees=None,
d08d5f54	313	order=ifaceSchedulerFlags.POSTORDER,
	314	followdependents=True):
	315	""" Runs iface dependeny graph by visiting all the nodes
	316
	317	Parameters:
	318	-----------
	319	ifupdownobj : ifupdown object (used for getting and updating iface
	320	object state)
	321	dependency_graph : dependency graph in adjacency list
	322	format (contains more than one dependency graph)
	323	ops : list of operations to perform eg ['pre-up', 'up', 'post-up']
	324
	325	indegrees : indegree array if present is used to determine roots
	326	of the graphs in the dependency_graph
	327	"""
c798b0f4	328
c798b0f4	329	if not ifupdownobj.ALL or not followdependents or len(ifacenames) == 1:
ca3f4fc7	330	# If there is any interface that does exist, maybe it is a
	331	# logical interface and we have to followupperifaces
	332	followupperifaces = (True if
	333	[i for i in ifacenames
923290bd	334	if not ifupdownobj.link_exists(i)]
923290bd	335	else False)
c798b0f4	336	cls.run_iface_list(ifupdownobj, ifacenames, ops,
	337	parent=None,order=order,
	338	followdependents=followdependents)
ca3f4fc7	339	if (not ifupdownobj.ALL and
923290bd	340	(followdependents or followupperifaces) and
923290bd	341	'up' in ops[0]):
c798b0f4	342	# If user had given a set of interfaces to bring up
	343	# try and execute 'up' on the upperifaces
	344	ifupdownobj.logger.info('running upperifaces if available')
	345	cls._STATE_CHECK = False
	346	cls.run_iface_list_upper(ifupdownobj, ifacenames, ops,
	347	skip_root=True)
	348	cls._STATE_CHECK = True
	349	return
f3215127	350
44a6ca06 RP	351	if ifupdownobj.config.get('skip_ifacesort', '0') == '1':
	352	# This is a backdoor to skip sorting of interfaces, if required
	353	cls.run_iface_list(ifupdownobj, ifacenames, ops,
	354	parent=None,order=order,
	355	followdependents=followdependents)
	356	return
	357
	358	run_queue = []
c798b0f4	359	# Get a sorted list of all interfaces
20dd6242	360	if not indegrees:
f3215127	361	indegrees = OrderedDict()
d08d5f54	362	for ifacename in dependency_graph.keys():
f3215127	363	indegrees[ifacename] = ifupdownobj.get_iface_refcnt(ifacename)
f3215127	364	sorted_ifacenames = graph.topological_sort_graphs_all(dependency_graph,
f90dd038	365	indegrees)
be0b20f2	366	ifupdownobj.logger.debug('sorted ifacenames %s : '
be0b20f2	367	%str(sorted_ifacenames))
f3215127	368
c798b0f4	369	# From the sorted list, pick interfaces that user asked
	370	# and those that dont have any dependents first
	371	[run_queue.append(ifacename)
	372	for ifacename in sorted_ifacenames
	373	if ifacename in ifacenames and
	374	not indegrees.get(ifacename)]
d08d5f54	375
20dd6242	376	ifupdownobj.logger.debug('graph roots (interfaces that dont have '
20dd6242	377	'dependents):' + ' %s' %str(run_queue))
c798b0f4	378	cls.run_iface_list(ifupdownobj, run_queue, ops,
be0b20f2	379	parent=None,order=order,
be0b20f2	380	followdependents=followdependents)