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Daniel Kahn Gillmor

2007-Nov-09 06:48 UTC

[Pkg-xen-devel] Bug#450678: xen-utils-common: /etc/init.d/xen restart fails when using network-bridge if netdev does not match eth[0-9+]

Subject: xen-utils-common: /etc/init.d/xen restart fails when using
network-bridge if netdev does not match eth[0-9+]
Package: xen-utils-common
Version: 3.1.0-1
Severity: normal

*** Please type your report below this line ***

On a machine where the NICs are named something other than ethN, and
using (network-script 'network-bridge netdev=XXX') (where XXX is the
name of one of these devices), /etc/init.d/xend restart fails
consistently.

For instance, i've got a machine which has the interface to be bridged
named "wan".  It's named this reliably by a hand-modified
/etc/udev/rules.d/z25_persistent-net.rules.

So /etc/xen/xend-config.sxp has this line:

(network-script 'network-bridge netdev=wan')

xen comes up and works fine with this device bridged, but this happens
(the leading "0" is the return code of the previous process):

0 zorro:~# /etc/init.d/xend restart
Restarting XEN control daemon: xend failed!
0 zorro:~# 

trying the commands by hand (without the initscript) does no better
(though you can see the return code directly, at least):

0 zorro:~# /usr/lib/xen-3.1-1/bin/xend status
0 zorro:~# /usr/lib/xen-3.1-1/bin/xend stop
0 zorro:~# /usr/lib/xen-3.1-1/bin/xend start
1 zorro:~# 

When the failure happens, the following messages show up in
/var/log/xen/xend.log:

[2007-11-09 01:10:15 3111] INFO (__init__:1072) Xend Daemon started
[2007-11-09 01:10:15 3111] INFO (__init__:1072) Xend changeset: unavailable.
[2007-11-09 01:10:15 3111] INFO (__init__:1072) Xend version: Unknown.
[2007-11-09 01:10:15 3111] ERROR (__init__:1072) Exception starting xend (local
variable 'bridged_mac' referenced before assignment)
Traceback (most recent call last):
  File "/usr/lib/xen-3.1-1/lib/python/xen/xend/server/SrvDaemon.py",
line 345, in run
    servers = SrvServer.create()
  File "/usr/lib/xen-3.1-1/lib/python/xen/xend/server/SrvServer.py",
line 254, in create
    root.putChild('xend', SrvRoot())
  File "/usr/lib/xen-3.1-1/lib/python/xen/xend/server/SrvRoot.py",
line 40, in __init__
    self.get(name)
  File "/usr/lib/xen-3.1-1/lib/python/xen/web/SrvDir.py", line 82, in
get
    val = val.getobj()
  File "/usr/lib/xen-3.1-1/lib/python/xen/web/SrvDir.py", line 52, in
getobj
    self.obj = klassobj()
  File "/usr/lib/xen-3.1-1/lib/python/xen/xend/server/SrvNode.py",
line 30, in __init__
    self.xn = XendNode.instance()
  File "/usr/lib/xen-3.1-1/lib/python/xen/xend/XendNode.py", line 659,
in instance
    inst = XendNode()
  File "/usr/lib/xen-3.1-1/lib/python/xen/xend/XendNode.py", line 178,
in __init__
    unconfigured_pifs = [(name, mtu, mac)
  File "/usr/lib/xen-3.1-1/lib/python/xen/xend/XendPIF.py", line 66,
in linux_get_phy_ifaces
    phy_ifaces.append((name, int(mtu), bridged_mac))
UnboundLocalError: local variable 'bridged_mac' referenced before
assignment

It's interesting that during the first boot (before the network-bridge
is brought up for the first time), there doesn't seem to be a problem
doing /etc/init.d/xend start.  Only subsequent /etc/init.d/xend/starts
seem to fail.

The following patch seems to fix things for me (i.e. i can restart xen
cleanly), but i haven't excercised xen enough with it to know if it
breaks anything else:

--- /usr/lib/xen-3.1-1/lib/python/xen/xend/XendPIF.py.orig	2007-11-09
01:29:00.000000000 -0500
+++ /usr/lib/xen-3.1-1/lib/python/xen/xend/XendPIF.py		2007-11-09
01:29:29.000000000 -0500
@@ -32,7 +32,7 @@
 IP_IFACE_RE = re.compile(r'^\d+: (\w+):.*mtu (\d+) .* link/\w+
([0-9a-f:]+)')
 
 def linux_phy_to_virt(pif_name):
-    return 'eth' + re.sub(r'^[a-z]+', '', pif_name)
+    return re.sub(r'^p', '', pif_name)
 
 def linux_get_phy_ifaces():
     """Returns a list of physical interfaces.

Thanks for maintaining xen in debian!

Regards,

	--dkg

-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 2.6.18-5-xen-686 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages xen-utils-common depends on:
ii  lsb-base                      3.1-24     Linux Standard Base 3.1 init scrip
ii  udev                          0.114-2    /dev/ and hotplug management daemo

xen-utils-common recommends no packages.

-- no debconf information
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Debian Bug Tracking System

2012-May-06 13:51 UTC

head link

[Pkg-xen-devel] Bug#450678: marked as done (xen-utils-common: /etc/init.d/xen restart fails when using network-bridge if netdev does not match eth[0-9+])

Your message dated Sun, 6 May 2012 15:50:24 +0200
with message-id <20120506135024.GF11813 at wavehammer.waldi.eu.org>
and subject line network-bridge not supported
has caused the Debian Bug report #450678,
regarding xen-utils-common: /etc/init.d/xen restart fails when using
network-bridge if netdev does not match eth[0-9+]
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner at bugs.debian.org
immediately.)


-- 
450678: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=450678
Debian Bug Tracking System
Contact owner at bugs.debian.org with problems
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Pkg xen devel - Nov 2007 - Bug#450678: xen-utils-common: /etc/init.d/xen restart fails when using network-bridge if netdev does not match eth[0-9+]

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[Pkg-xen-devel] Bug#450678: marked as done (xen-utils-common: /etc/init.d/xen restart fails when using network-bridge if netdev does not match eth[0-9+])

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