Re: [Xen-users] Re: network-bridge fails leaving tmpbridge around

["Weismueller, Jonas" <jonas.weismueller@xxxxxxxxxx>]

Daniel P. Berrange wrote:
> But given the place in the network-bridge scrpit where you say it is failing,
> the tmpbridge device has not been brought up yet, so I've no clue how it
> got into that state.
>
> As a nasty hack you can try changing op_start method from
>
>     ip link set ${netdev} name ${pdev}
>     ip link set ${tdev} name ${bridge}
>
> To
>
>     ip link set ${netdev} name ${pdev}
>     ip link set ${tdev} link down
>     ip link set ${tdev} name ${bridge}
>
> But I'd really like to know why it was in the UP state at all. So it'd
> be useful if you could edit op_start and put in a call 'ifconfig ${tdev}'
> and "echo doing stage ...blah..." in between every step in op_start() to 
> see just where it gets into the UP state
> Dan.
>   
I disabled libvirtd in the runlevel to get rid of the virbr0 device and 
rebooted. The result is shown in the *.before files.
I changed the lines in op_start as you said:
op_start () {
...
#    ip link set ${netdev} name ${pdev}
#    ip link set ${tdev} name ${bridge}
    ip link set ${netdev} name ${pdev}
    ip link set ${tdev} link down
    ip link set ${tdev} name ${bridge}
...

A /etc/init.d/xend start results in the *.after files.

Debugging the code results in:
[root@scp-156 ~]# /etc/xen/scripts/network-bridge start
stage 1
tmpbridge: error fetching interface information: Device not found

Attached you will find the code block of op_start{}

Regards Jonas

op_start () {
    if [ "${bridge}" = "null" ] ; then
        return
    fi
        echo 'stage 1'
        ifconfig ${tdev}
    if link_exists "$pdev"; then
        # The device is already up.
        return
    fi
        echo 'stage 2'
        ifconfig ${tdev}

    create_bridge ${tdev}
        echo 'stage 3'
        ifconfig ${tdev}

    preiftransfer ${netdev}
        echo 'stage 4'
        ifconfig ${tdev}

    transfer_addrs ${netdev} ${tdev}
        echo 'stage 5'
        ifconfig ${tdev}

    if ! ifdown ${netdev}; then
        # If ifdown fails, remember the IP details.
        get_ip_info ${netdev}
        ip link set ${netdev} down
        ip addr flush ${netdev}
    fi
        echo 'stage 6'
        ifconfig ${tdev}

    ip link set ${netdev} name ${pdev}
        echo 'stage 7'
        ifconfig ${tdev}

    ip link set ${tdev} name ${bridge}
        echo 'stage 8'
        ifconfig ${tdev}

#    ip link set ${netdev} name ${pdev}
#    ip link set ${tdev} link down
#    ip link set ${tdev} name ${bridge}

    setup_bridge_port ${pdev}
        echo 'stage 9'
        ifconfig ${tdev}


    add_to_bridge2 ${bridge} ${pdev}
        echo 'stage 10'
        ifconfig ${tdev}

    do_ifup ${bridge}
        echo 'stage 11'
        ifconfig ${tdev}


    if [ ${antispoof} = 'yes' ] ; then
        antispoofing
    fi
        echo 'stage 12'
        ifconfig ${tdev}

}

bridge name     bridge id               STP enabled     interfaces
tmpbridge               8000.000000000000       no              
virbr0          8000.000000000000       no              

bridge name     bridge id               STP enabled     interfaces

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:4 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:200 (200.0 b)  TX bytes:200 (200.0 b)

peth0     Link encap:Ethernet  HWaddr 00:30:05:C4:99:E2  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:674117 errors:0 dropped:0 overruns:0 frame:0
          TX packets:449 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:50516088 (48.1 MiB)  TX bytes:67552 (65.9 KiB)
          Base address:0x4840 Memory:d0500000-d0520000 

tmpbridge Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          inet addr:172.16.135.156  Bcast:172.16.255.255  Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

virbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

eth0      Link encap:Ethernet  HWaddr 00:30:05:C4:99:E2  
          inet addr:172.16.135.156  Bcast:172.16.255.255  Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:669612 errors:0 dropped:0 overruns:0 frame:0
          TX packets:153 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100 
          RX bytes:50159030 (47.8 MiB)  TX bytes:24776 (24.1 KiB)
          Base address:0x4840 Memory:d0500000-d0520000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:4 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:200 (200.0 b)  TX bytes:200 (200.0 b)

172.16.0.0/16 dev eth0  proto kernel  scope link  src 172.16.135.156 
default via 172.16.1.16 dev eth0 

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