[dts] [PATCH V2]pmd_stacked_bonded: upload automation script

Chen, Zhaoyan zhaoyan.chen at intel.com
Thu Feb 28 09:40:32 CET 2019


Acked-by: Chen, Zhaoyan <zhaoyan.chen at intel.com>



Regards,
Zhaoyan Chen


> -----Original Message-----
> From: dts [mailto:dts-bounces at dpdk.org] On Behalf Of Mo, YufengX
> Sent: Thursday, February 28, 2019 2:03 PM
> To: dts at dpdk.org
> Cc: Mo, YufengX <yufengx.mo at intel.com>
> Subject: Re: [dts] [PATCH V2]pmd_stacked_bonded: upload automation script
> 
> 
> 
> Tested-by: Mo, YufengX <yufengx.mo at intel.com>
> 
> > -----Original Message-----
> > From: Mo, YufengX
> > Sent: Thursday, February 28, 2019 2:02 PM
> > To: dts at dpdk.org
> > Cc: Mo, YufengX <yufengx.mo at intel.com>
> > Subject: [dts][PATCH V2]pmd_stacked_bonded: upload automation script
> >
> >
> > This automation script is for pmd stacked bonded feature.
> >
> > Allow bonded devices to be stacked to allow two or more bonded devices
> > to be bonded into one master bonded device
> >
> > Signed-off-by: yufengmx <yufengx.mo at intel.com>
> > ---
> >  tests/TestSuite_pmd_stacked_bonded.py | 531
> > ++++++++++++++++++++++++++++++++++
> >  1 file changed, 531 insertions(+)
> >  create mode 100644 tests/TestSuite_pmd_stacked_bonded.py
> >
> > diff --git a/tests/TestSuite_pmd_stacked_bonded.py
> > b/tests/TestSuite_pmd_stacked_bonded.py
> > new file mode 100644
> > index 0000000..e1ce01a
> > --- /dev/null
> > +++ b/tests/TestSuite_pmd_stacked_bonded.py
> > @@ -0,0 +1,531 @@
> > +# BSD LICENSE
> > +#
> > +# Copyright(c) 2010-2019 Intel Corporation. All rights reserved.
> > +# All rights reserved.
> > +#
> > +# Redistribution and use in source and binary forms, with or without
> > +# modification, are permitted provided that the following conditions
> > +# are met:
> > +#
> > +#   * Redistributions of source code must retain the above copyright
> > +#     notice, this list of conditions and the following disclaimer.
> > +#   * Redistributions in binary form must reproduce the above copyright
> > +#     notice, this list of conditions and the following disclaimer in
> > +#     the documentation and/or other materials provided with the
> > +#     distribution.
> > +#   * Neither the name of Intel Corporation nor the names of its
> > +#     contributors may be used to endorse or promote products derived
> > +#     from this software without specific prior written permission.
> > +#
> > +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
> CONTRIBUTORS
> > +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
> NOT #
> > +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
> FITNESS FOR
> > +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
> > +COPYRIGHT # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
> INDIRECT,
> > +INCIDENTAL, # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
> > +(INCLUDING, BUT NOT # LIMITED TO, PROCUREMENT OF SUBSTITUTE
> GOODS OR
> > +SERVICES; LOSS OF USE, # DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> > +HOWEVER CAUSED AND ON ANY # THEORY OF LIABILITY, WHETHER IN
> CONTRACT,
> > +STRICT LIABILITY, OR TORT # (INCLUDING NEGLIGENCE OR OTHERWISE)
> > +ARISING IN ANY WAY OUT OF THE USE # OF THIS SOFTWARE, EVEN IF
> ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> > +
> > +import time
> > +import traceback
> > +
> > +# import dts/framework libs
> > +import utils
> > +from test_case import TestCase
> > +from exception import VerifyFailure
> > +
> > +# import bonding lib
> > +import bonding
> > +from bonding import (
> > +                MODE_ROUND_ROBIN,
> > +                MODE_ACTIVE_BACKUP,
> > +                MODE_XOR_BALANCE,
> > +                MODE_BROADCAST,
> > +                MODE_LACP,
> > +                MODE_TLB_BALANCE,
> > +                MODE_ALB_BALANCE,
> > +                FRAME_SIZE_64)
> > +
> > +class TestBondingStacked(TestCase):
> > +
> > +    #
> > +    # On dut, dpdk bonding
> > +    #
> > +    def check_bonded_device_queue_config(self, *devices):
> > +        '''
> > +        check if master bonded device/slave device queue configuration
> > +        is the same.
> > +        '''
> > +        # get master bonded device queue configuration
> > +        master = self.bond_inst.get_port_info(devices[0], 'queue_config')
> > +        # get slave device queue configuration
> > +        for port_id in devices[1:]:
> > +            config = self.bond_inst.get_port_info(port_id, 'queue_config')
> > +            if cmp(config, master) == 0:
> > +                continue
> > +            msg = ("slave bonded port [{0}] is "
> > +                   "different to top bonded port [{1}]").format(
> > +                                                        port_id, devices[0])
> > +            raise VerifyFailure('bonded device queue config:: ' +
> > + msg)
> > +
> > +    def set_stacked_bonded(self, slaveGrpOne, slaveGrpTwo, bond_mode,
> > +                           ignore=False):
> > +        '''
> > +        set stacked bonded mode for a custom bonding mode
> > +        '''
> > +        inst = self.bond_inst
> > +        socket_id = self.dut.get_numa_id(self.bond_slave)
> > +        # create first bonded device 1, add slaves in it
> > +        bond_port_1 = inst.create_bonded_device(bond_mode, socket_id)
> > +        inst.add_slave(bond_port_1, False, '', *slaveGrpOne)
> > +        # create second bonded device 2, add slaves in it
> > +        bond_port_2 = inst.create_bonded_device(bond_mode, socket_id)
> > +        inst.add_slave(bond_port_2, False, '', *slaveGrpTwo)
> > +        # create master bonded device 3, which is the top bonded device
> > +        master_bond_port = inst.create_bonded_device(bond_mode, socket_id)
> > +        # add bond bonded device 1 to bonded device 3
> > +        # check bonding config status
> > +        inst.add_slave(master_bond_port, False, '', *[bond_port_1])
> > +        # add bonded device 2 to bonded device 3
> > +        # check bonding config status
> > +        inst.add_slave(master_bond_port, False, '', *[bond_port_2])
> > +        # check if master bonding/each slaves queue configuration is the same.
> > +        if not ignore:
> > +            self.check_bonded_device_queue_config(*[master_bond_port,
> > +                                                 bond_port_1,
> > + bond_port_2])
> > +
> > +        return [bond_port_1, bond_port_2, master_bond_port]
> > +
> > +    def set_third_stacked_bonded(self, bond_port, bond_mode):
> > +        '''
> > +        set third level stacked bonded to check if stacked level can be set
> > +        more than 2
> > +        '''
> > +        inst = self.bond_inst
> > +        socket_id = self.dut.get_numa_id(self.bond_slave)
> > +        third_bond_port = inst.create_bonded_device(bond_mode, socket_id)
> > +        inst.add_slave(third_bond_port, False, '', *[bond_port])
> > +
> > +    def duplicate_add_stacked_bonded(self, bond_port_1, bond_port_2,
> > +                                     master_bond_port):
> > +        '''
> > +        check if adding duplicate stacked bonded device is forbidden
> > +        '''
> > +        inst = self.bond_inst
> > +        # check exception process
> > +        expected_str = 'Slave device is already a slave of a bonded device'
> > +        # add bonded device 1 to bonded device 3
> > +        # check bonding config status
> > +        inst.add_slave(master_bond_port, False, expected_str, *[bond_port_1])
> > +        # add bonded device 2 to bonded device 3
> > +        # check bonding config status
> > +        inst.add_slave(master_bond_port, False, expected_str,
> > + *[bond_port_2])
> > +
> > +    def preset_stacked_bonded(self, slaveGrpOne, slaveGrpTwo, bond_mode):
> > +        bond_port_1, bond_port_2, master_bond_port = self.set_stacked_bonded(
> > +                                                                slaveGrpOne,
> > +                                                                slaveGrpTwo,
> > +                                                                bond_mode,
> > +                                                                ignore=True)
> > +        portList = [slaveGrpOne[0],
> > +                    slaveGrpTwo[0],
> > +                    bond_port_1,
> > +                    bond_port_2,
> > +                    master_bond_port]
> > +        cmds = [
> > +            ["port stop all", ''],
> > +            ["set portlist " + ",".join([str(port) for port in portList]), ''],
> > +            ["port start all", ' ', 15]]
> > +        self.bond_inst.d_console(cmds)
> > +        # blank space command is used to skip LSC event to avoid core dumped
> issue
> > +        time.sleep(5)
> > +        cmds = [ [' ', ''],
> > +                 ["start", '']]
> > +        self.bond_inst.d_console(cmds)
> > +        time.sleep(5)
> > +
> > +        return bond_port_1, bond_port_2, master_bond_port
> > +
> > +    #
> > +    # packet transmission
> > +    #
> > +    def traffic(self, traffic_config, ports):
> > +        # get ports statistics before sending packets
> > +        stats_pre = self.bond_inst.get_all_stats(ports)
> > +        # send packets
> > +        self.bond_inst.send_packet(traffic_config)
> > +        # get ports statistics after sending packets
> > +        stats_post = self.bond_inst.get_all_stats(ports)
> > +        # calculate ports statistics result
> > +        for port_id in ports:
> > +            stats_post[port_id]['RX-packets'] -= stats_pre[port_id]['RX-packets']
> > +            stats_post[port_id]['TX-packets'] -=
> > + stats_pre[port_id]['TX-packets']
> > +
> > +        return stats_post
> > +
> > +    def config_port_traffic(self, tx_port, rx_port, total_pkt):
> > +        ''' set traffic configuration '''
> > +        traffic_config = {
> > +            'port topo': [tx_port, rx_port],
> > +            'stream': self.bond_inst.set_stream_to_slave_port(rx_port),
> > +            'traffic configs': {
> > +                  'count': total_pkt,
> > +            },}
> > +
> > +        return traffic_config
> > +
> > +    def active_slave_rx(self, slave, bond_port, mode):
> > +        msg = "send packet to active slave port <{0}>".format(slave)
> > +        self.logger.info(msg)
> > +        tx_intf = self.tester.get_interface(
> > +                        self.tester.get_local_port(self.dut_ports[slave]))
> > +        # get traffic config
> > +        traffic_config = self.config_port_traffic(tx_intf, slave,self.total_pkt)
> > +        # select ports for statistics
> > +        ports = [slave, bond_port]
> > +        # run traffic
> > +        stats = self.traffic(traffic_config, ports)
> > +        # check slave statistics
> > +        msg = "port <{0}> Data not received by port <{1}>".format(
> > +                                                       tx_intf, slave)
> > +        # here using `>=` to ignore some miscellaneous packets, e.g. lldp
> > +        self.verify(stats[slave]['RX-packets'] >= self.total_pkt, msg)
> > +        msg = "tester port {0}  <----> dut port {1} is ok".format(
> > +                                                        tx_intf, slave)
> > +        self.logger.info(msg)
> > +        # check bond port statistics
> > +        # here using `>=` to ignore some miscellaneous packets, e.g. lldp
> > +        self.verify(stats[slave]['RX-packets'] >= self.total_pkt,
> > +                    "Bond port have error RX packet in XOR")
> > +
> > +    def inactive_slave_rx(self, slave, bond_port, mode):
> > +        msg = "send packet to inactive slave port <{0}>".format(slave)
> > +        self.logger.info(msg)
> > +        tx_intf = self.tester.get_interface(
> > +                        self.tester.get_local_port(self.dut_ports[slave]))
> > +        # get traffic config
> > +        traffic_config = self.config_port_traffic(tx_intf, slave,self.total_pkt)
> > +        # select ports for statistics
> > +        ports = [slave, bond_port]
> > +        # run traffic
> > +        stats = self.traffic(traffic_config, ports)
> > +        # check slave statistics
> > +        msg = ("port <{0}> Data received by port <{1}>, "
> > +               "but should not.").format(tx_intf, slave)
> > +        self.verify(stats[slave]['RX-packets'] == 0, msg)
> > +        msg = "tester port {0}  <-|  |-> dut port {1} is blocked".format(
> > +                                                                tx_intf, slave)
> > +        self.logger.info(msg)
> > +        # check bond port statistics
> > +        self.verify(stats[slave]['RX-packets'] == 0,
> > +                    "Bond port have error RX packet in
> > + {0}".format(mode))
> > +
> > +    def check_traffic_with_one_slave_down(self, mode):
> > +        """
> > +        Verify that transmitting packets correctly when set one slave of
> > +        the bonded device link down.
> > +        """
> > +        results = []
> > +        #-------------------------------
> > +        # boot up testpmd
> > +        self.bond_inst.start_testpmd()
> > +        try:
> > +            slaves = {'active' : [], 'inactive' : []}
> > +            #-------------------------------
> > +            # preset stacked bonded device
> > +            slaveGrpOne = self.slaveGrpOne
> > +            slaveGrpTwo = self.slaveGrpTwo
> > +            bond_port_1, bond_port_2, master_bond_port = \
> > +                    self.preset_stacked_bonded(slaveGrpOne, slaveGrpTwo, mode)
> > +            #---------------------------------------------------
> > +            # set one slave of first bonded device link down
> > +            primary_slave = slaveGrpOne[0]
> > +            self.bond_inst.set_dut_port_status(primary_slave, "down")
> > +            slaves['inactive'].append(primary_slave)
> > +            # get slave status
> > +            primary_port, active_slaves = \
> > +                                self.bond_inst.get_active_slaves(bond_port_1)
> > +            slaves['active'].extend(active_slaves)
> > +            if primary_slave in slaves['active']:
> > +                msg = "{0} should not be in active slaves list".format(
> > +                                                                primary_slave)
> > +                raise Exception(msg)
> > +            #---------------------------------------------------
> > +            # set one slave of second bonded device link down
> > +            primary_slave = slaveGrpTwo[0]
> > +            self.bond_inst.set_dut_port_status(primary_slave, "down")
> > +            slaves['inactive'].append(primary_slave)
> > +            # check active slaves
> > +            primary_port_2, active_slaves_2 = \
> > +                                self.bond_inst.get_active_slaves(bond_port_2)
> > +            slaves['active'].extend(active_slaves_2)
> > +            if primary_slave in slaves['active']:
> > +                msg = "{0} should not be in active slaves list".format(
> > +                                                                primary_slave)
> > +                raise Exception(msg)
> > +            # traffic testing
> > +            # active slave traffic testing
> > +            for slave in slaves['active']:
> > +                self.active_slave_rx(slave, master_bond_port, mode)
> > +            # inactive slave traffic testing
> > +            for slave in slaves['inactive']:
> > +                self.inactive_slave_rx(slave, master_bond_port, mode)
> > +        except Exception as e:
> > +            results.append(e)
> > +            self.logger.error(traceback.format_exc())
> > +        finally:
> > +            self.bond_inst.close_testpmd()
> > +
> > +        return results
> > +
> > +    def check_traffic(self, mode):
> > +        """ normal traffic with all slaves are under active status.
> > +        verify the RX packets are all correct with stacked bonded device.
> > +        bonded device's statistics should be the sum of slaves statistics.
> > +        """
> > +        self.bond_inst.start_testpmd()
> > +        slaveGrpOne = self.slaveGrpOne
> > +        slaveGrpTwo = self.slaveGrpTwo
> > +        bond_port_1, bond_port_2, master_bond_port = \
> > +                self.preset_stacked_bonded(slaveGrpOne, slaveGrpTwo, mode)
> > +        results = []
> > +        # check first bonded device
> > +        try:
> > +            self.logger.info('check first bonded device')
> > +            # active slave traffic testing
> > +            for slave in slaveGrpOne:
> > +                self.active_slave_rx(slave, bond_port_1, mode)
> > +        except Exception as e:
> > +            results.append(e)
> > +        # check second bonded device
> > +        try:
> > +            self.logger.info('check second bonded device')
> > +            # active slave traffic testing
> > +            for slave in slaveGrpOne:
> > +                self.active_slave_rx(slave, bond_port_2, mode)
> > +        except Exception as e:
> > +            results.append(e)
> > +
> > +        # check top bonded device
> > +        try:
> > +            self.logger.info('check master bonded device')
> > +            # active slave traffic testing
> > +            for slave in slaveGrpOne + slaveGrpTwo:
> > +                self.active_slave_rx(slave, master_bond_port, mode)
> > +        except Exception as e:
> > +            results.append(e)
> > +
> > +        self.bond_inst.close_testpmd()
> > +
> > +        return results
> > +
> > +    def backup_check_traffic(self):
> > +        mode = MODE_ACTIVE_BACKUP
> > +        msg = "begin checking bonding backup(stacked) mode transmission"
> > +        self.logger.info(msg)
> > +        results = self.check_traffic(mode)
> > +        if results:
> > +            for item in results:
> > +                self.logger.error(item)
> > +            raise VerifyFailure("backup(stacked) mode: rx failed")
> > +
> > +    def backup_check_traffic_with_slave_down(self):
> > +        mode = MODE_ACTIVE_BACKUP
> > +        self.logger.info("begin checking bonding backup(stacked) "
> > +                         "mode transmission with one slave down")
> > +        results = self.check_traffic_with_one_slave_down(mode)
> > +        if results:
> > +            for item in results:
> > +                self.logger.error(item)
> > +            msg = "backup(stacked) mode: rx with one slave down failed"
> > +            raise VerifyFailure(msg)
> > +
> > +    def xor_check_rx(self):
> > +        mode = MODE_XOR_BALANCE
> > +        msg = "begin checking bonding xor(stacked) mode transmission"
> > +        self.logger.info(msg)
> > +        results = self.check_traffic(mode)
> > +        if results:
> > +            for item in results:
> > +                self.logger.error(item)
> > +            raise VerifyFailure("xor(stacked) mode: rx failed")
> > +
> > +    def xor_check_stacked_rx_one_slave_down(self):
> > +        mode = MODE_XOR_BALANCE
> > +        self.logger.info("begin checking bonding xor(stacked) mode "
> > +                         "transmission with one slave down")
> > +        results = self.check_traffic_with_one_slave_down(mode)
> > +        if results:
> > +            for item in results:
> > +                self.logger.error(item)
> > +            msg = "xor(stacked) mode: rx with one slave down failed"
> > +            raise VerifyFailure(msg)
> > +    #
> > +    # Test cases.
> > +    #
> > +    def set_up_all(self):
> > +        """
> > +        Run before each test suite
> > +        """
> > +        self.verify('bsdapp' not in self.target, "Bonding not support freebsd")
> > +        self.dut_ports = self.dut.get_ports()
> > +        num_ports = len(self.dut_ports)
> > +        self.verify(num_ports == 2 or num_ports == 4, "Insufficient ports")
> > +        # separate ports into two group as first level bond ports' slaves
> > +        sep_index = len(self.dut_ports)/2
> > +        self.slaveGrpOne = self.dut_ports[:sep_index]
> > +        self.slaveGrpTwo = self.dut_ports[sep_index:]
> > +        self.bond_slave = self.dut_ports[0]
> > +        # initialize bonding common methods name
> > +        self.total_pkt = 100
> > +        config = {
> > +            'parent': self,
> > +            'pkt_name': 'udp',
> > +            'pkt_size': FRAME_SIZE_64,
> > +            'src_mac': '52:00:00:00:00:03',
> > +            'src_ip': '10.239.129.65',
> > +            'src_port': 61,
> > +            'dst_ip': '10.239.129.88',
> > +            'dst_port': 53,}
> > +        self.bond_inst = bonding.PmdBonding(**config)
> > +
> > +    def tear_down_all(self):
> > +        """
> > +        Run after each test suite.
> > +        """
> > +        pass
> > +
> > +    def set_up(self):
> > +        """
> > +        Run before each test case.
> > +        """
> > +        pass
> > +
> > +    def tear_down(self):
> > +        """
> > +        Run after each test case.
> > +        """
> > +
> > +    def test_basic_behav(self):
> > +        '''
> > +        allow a bonded device to be added to another bonded device.
> > +        There's two limitations to create master bonding:
> > +
> > +         - Total depth of nesting is limited to two levels,
> > +         - 802.3ad mode is not supported if one or more slaves is a
> > + bond device
> > +
> > +        note: There 802.3ad mode can not be supported on this bond device.
> > +
> > +        This case is aimed at testing basic behavior of stacked bonded commands.
> > +
> > +        '''
> > +        #------------------------------------------------
> > +        # check stacked bonded status, except mode 4 (802.3ad)
> > +        mode_list =[MODE_ROUND_ROBIN,
> > +                    MODE_ACTIVE_BACKUP,
> > +                    MODE_XOR_BALANCE,
> > +                    MODE_BROADCAST,
> > +                    MODE_TLB_BALANCE,
> > +                    MODE_ALB_BALANCE]
> > +        slaveGrpOne = self.slaveGrpOne
> > +        slaveGrpTwo = self.slaveGrpTwo
> > +        check_result = []
> > +        for bond_mode in mode_list:
> > +            self.logger.info("begin mode <{0}> checking".format(bond_mode))
> > +            # boot up testpmd
> > +            self.bond_inst.start_testpmd()
> > +            try:
> > +                self.logger.info("check bonding mode <{0}>".format(bond_mode))
> > +                # set up stacked bonded status
> > +                bond_port_1, bond_port_2, master_bond_port = \
> > +                    self.set_stacked_bonded(slaveGrpOne, slaveGrpTwo, bond_mode)
> > +                # check duplicate add slave
> > +                self.duplicate_add_stacked_bonded(bond_port_1, bond_port_2,
> > +                                                  master_bond_port)
> > +                # check stacked limitation
> > +                self.set_third_stacked_bonded(master_bond_port, bond_mode)
> > +                # quit testpmd, it is not supported to reset testpmd
> > +                self.logger.info("mode <{0}> done !".format(bond_mode))
> > +                check_result.append([bond_mode, None])
> > +            except Exception as e:
> > +                check_result.append([bond_mode, e])
> > +                self.logger.error(e)
> > +            finally:
> > +                self.bond_inst.close_testpmd()
> > +                time.sleep(5)
> > +        #------------------------------------------------
> > +        # 802.3ad mode is not supported
> > +        # if one or more slaves is a bond device
> > +        # so it should raise a exception
> > +        msg = ''
> > +        try:
> > +            # boot up testpmd
> > +            self.bond_inst.start_testpmd()
> > +            # set up stacked bonded status
> > +            self.set_stacked_bonded(slaveGrpOne, slaveGrpTwo, MODE_LACP)
> > +            # quit testpmd, it is not supported to reset testpmd
> > +            msg = ("802.3ad mode hasn't been forbidden to "
> > +                   "use stacked bonded setting")
> > +            check_result.append([MODE_LACP, msg])
> > +        except Exception as e:
> > +            check_result.append([MODE_LACP, None])
> > +        finally:
> > +            self.bond_inst.close_testpmd()
> > +
> > +        exception_flag = False
> > +        for bond_mode, e in check_result:
> > +            msg = "mode <{0}>".format(bond_mode)
> > +            if e:
> > +                self.logger.info(msg)
> > +                self.logger.error(e)
> > +                exception_flag = True
> > +            else:
> > +                self.logger.info(msg + ' done !')
> > +        # if some checking item is failed, raise exception
> > +        if exception_flag:
> > +            raise VerifyFailure('some test items failed')
> > +        else:
> > +            self.logger.info('all test items have done !')
> > +
> > +    def test_mode_backup_rx(self):
> > +        """
> > +        Verify receive packets correctly in the active-backup(stacked) mode.
> > +        """
> > +        self.backup_check_traffic()
> > +
> > +    def test_mode_backup_one_slave_down(self):
> > +        """
> > +        Verify that receive packets correctly in the active-backup(stacked) mode
> > +        when bringing any one slave of the bonding device link down.
> > +        """
> > +        slave_down_port_limit = 4
> > +        if len(self.dut_ports) < slave_down_port_limit:
> > +            msg = ("ports less than {0}, "
> > +                   "ignore stacked one slave down check").format(
> > +                                                        slave_down_port_limit)
> > +            self.logger.warning(msg)
> > +            return
> > +        self.backup_check_traffic_with_slave_down()
> > +
> > +    def test_mode_xor_rx(self):
> > +        """
> > +        Verify that receive packets correctly in the XOR(stacked) mode.
> > +        """
> > +        self.xor_check_rx()
> > +
> > +    def test_mode_xor_rx_one_slave_down(self):
> > +        """
> > +        Verify that receive packets correctly in the XOR(stacked) mode when
> > +        bringing any one slave of the bonding device link down.
> > +        """
> > +        slave_down_port_limit = 4
> > +        if len(self.dut_ports) < slave_down_port_limit:
> > +            msg = ("ports less than {0}, "
> > +                   "ignore stacked one slave down check").format(
> > +                                                        slave_down_port_limit)
> > +            self.logger.warning(msg)
> > +            return
> > +        self.xor_check_stacked_rx_one_slave_down()
> > \ No newline at end of file
> > --
> > 1.9.3



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