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[Xen-devel] xend crash at startup

from [Guillaume Rousse] [Permanent Link][Original]
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] xend crash at startup
From: Guillaume Rousse <Guillaume.Rousse@xxxxxxxx>
Date: Mon, 05 Nov 2007 18:30:28 +0100
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xend crashes at startup with following stack trace:
...
File "/usr/lib64/python/xen/xend/XendPIF.py", line 68, in
linux_get_phy_ifaces
    phy_ifaces.append((name, int(mtu), bridged_mac))
UnboundLocalError: local variable 'bridged_mac' referenced before assignment

The simple patch attached below prevent the crash, and allow xend to
start normally.

It seems the crash happens when bridged_ifname is set to eth2, whereas
eth2 doesn't appear in ip -o link show.

I'm joining output of 'ifconfig', 'ip -o link', and 'brctl show'.
-- 
Guillaume Rousse
Moyens Informatiques - INRIA Futurs
Tel: 01 69 35 69 62

--- /usr/lib64/python/xen/xend/XendPIF.py       2007-05-18 16:45:21.000000000 
+0200
+++ XendPIF.py  2007-11-05 18:22:56.000000000 +0100
@@ -61,6 +61,7 @@
             if name[0] == 'p' and mac == 'fe:ff:ff:ff:ff:ff':
                 bridged_ifname = linux_phy_to_virt(name)
                 bridged_if = ifaces.get(bridged_ifname)
+                bridged_mac = ''
                 if bridged_if:
                     bridged_mac = bridged_if[2]
                 phy_ifaces.append((name, int(mtu), bridged_mac))

bridge name     bridge id               STP enabled     interfaces
administratif           8000.feffffffffff       no              peth2
dmz             8000.feffffffffff       no              peth3
recherche               8000.feffffffffff       no              peth1
services                8000.feffffffffff       no              vif0.0
                                                        peth0
                                                        vif2.0
xenbr0          8000.000000000000       no              

administratif Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:3034 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          RX bytes:305104 (297.9 KiB)  TX bytes:0 (0.0 b)

dmz       Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:447 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          RX bytes:106353 (103.8 KiB)  TX bytes:0 (0.0 b)

eth0      Link encap:Ethernet  HWaddr 00:1A:A0:14:A9:53  
          inet adr:193.51.235.19  Bcast:193.51.235.63  Masque:255.255.255.192
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:211728 errors:0 dropped:0 overruns:0 frame:0
          TX packets:150507 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          RX bytes:247843263 (236.3 MiB)  TX bytes:67882172 (64.7 MiB)

lo        Link encap:Boucle locale  
          inet adr:127.0.0.1  Masque:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:82 errors:0 dropped:0 overruns:0 frame:0
          TX packets:82 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          RX bytes:6712 (6.5 KiB)  TX bytes:6712 (6.5 KiB)

peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:220556 errors:0 dropped:0 overruns:0 frame:0
          TX packets:164769 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          RX bytes:249622348 (238.0 MiB)  TX bytes:69630057 (66.4 MiB)
          Interruption:16 Mémoire:f8000000-f8011100 

peth1     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:25464 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          RX bytes:2958983 (2.8 MiB)  TX bytes:0 (0.0 b)
          Interruption:16 Mémoire:f4000000-f4011100 

peth2     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:9703 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          RX bytes:786995 (768.5 KiB)  TX bytes:0 (0.0 b)
          Adresse de base:0xecc0 Mémoire:fc5e0000-fc600000 

peth3     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:7100 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:1000 
          RX bytes:541022 (528.3 KiB)  TX bytes:0 (0.0 b)
          Adresse de base:0xec80 Mémoire:fc5c0000-fc5e0000 

recherche Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:18341 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          RX bytes:2154136 (2.0 MiB)  TX bytes:0 (0.0 b)

services  Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:19473 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          RX bytes:3365681 (3.2 MiB)  TX bytes:0 (0.0 b)

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:150747 errors:0 dropped:0 overruns:0 frame:0
          TX packets:212225 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 lg file transmission:0 
          RX bytes:67923236 (64.7 MiB)  TX bytes:247900044 (236.4 MiB)

vif2.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:1529 errors:0 dropped:0 overruns:0 frame:0
          TX packets:53338 errors:0 dropped:18536 overruns:0 carrier:0
          collisions:0 lg file transmission:32 
          RX bytes:199763 (195.0 KiB)  TX bytes:43411929 (41.4 MiB)

xenbr0    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 lg file transmission:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)


1: lo: <LOOPBACK,UP,10000> mtu 16436 qdisc noqueue \    link/loopback 
00:00:00:00:00:00 brd 00:00:00:00:00:00
2: vif0.0: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc noqueue \    link/ether 
fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
3: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc noqueue \    link/ether 
00:1a:a0:14:a9:53 brd ff:ff:ff:ff:ff:ff
4: vif0.1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop \    link/ether 
fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
5: veth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop \    link/ether 
00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
6: vif0.2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop \    link/ether 
fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
7: veth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop \    link/ether 
00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
8: vif0.3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop \    link/ether 
fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
9: veth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop \    link/ether 
00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
10: peth1: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000\    
link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
11: peth2: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000\    
link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
12: peth3: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000\    
link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
13: eth4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000\    link/ether 
00:0e:0c:db:3e:36 brd ff:ff:ff:ff:ff:ff
14: eth5: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000\    link/ether 
00:0e:0c:db:3e:37 brd ff:ff:ff:ff:ff:ff
15: peth0: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000\    
link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
16: services: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc noqueue \    link/ether 
fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
17: recherche: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc noqueue \    
link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
18: administratif: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc noqueue \    
link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
19: dmz: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc noqueue \    link/ether 
fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
20: xenbr0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc noqueue \    
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
22: vif2.0: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc pfifo_fast qlen 32\    
link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff

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