Re: Fail to attach CDWriter

[Cole Robinson <crobinso@redhat.com>]

On 02/19/2010 04:47 AM, Mark Cave-Ayland wrote:
> satimis@pacific.net.hk wrote:
> 
>> Hi folks
>>
>>
>> KVM
>> Host - Fedora 12 64bit
>> VM (guest) - Windows Server 2008 64bit
>>
>>
>> Fail to attach CDWriter.
>>
>>
>> $ sudo virsh -c qemu:///system start vm06_wser08
>> Domain vm06_wser08 started
>>
>>
>> $ cat VM/DEV/cd.xml
>> <disk type="block" device="cdrom">
>> <target dev="hdc" bus="ide"/>
>> <readonly/>
>> <source dev="/dev/sr0"/>
>> </disk>
>>
>>
>> $ sudo virsh attach-device vm06_wser08 VM/DEV/cd.xml
>> error: Failed to attach device from VM/DEV/cd.xml
>> error: server closed connection
>>
>>
>> $ sudo tail /var/log/messages
>> Feb 19 15:45:36 localhost kernel: br0: port 2(vnet0) entering forwarding 
>> state
>> Feb 19 15:48:31 localhost libvirtd: 15:48:31.574: error : 
>> qemudDomainChangeEjectableMedia:5186 : internal error No device with bus 
>> 'ide' and target 'hdc'
>> Feb 19 15:48:31 localhost kernel: libvirtd[1738]: segfault at 70 ip 
>> 00000000004367e2 sp 00007f210acfc8f0 error 4 in libvirtd[400000+7f000]
>> Feb 19 15:48:31 localhost abrtd: Directory 'ccpp-1266565711-1639' 
>> creation detected
>> Feb 19 15:48:31 localhost abrtd: Lock file 
>> '/var/cache/abrt/ccpp-1266565711-1639.lock' is locked by process 21223
>> Feb 19 15:48:32 localhost abrtd: Lock file 
>> '/var/cache/abrt/ccpp-1266565711-1639.lock' is locked by process 21223
>> Feb 19 15:48:33 localhost abrt[21223]: saved core dump of pid 1639 
>> (/usr/sbin/libvirtd) to /var/cache/abrt/ccpp-1266565711-1639/coredump 
>> (60129280 bytes)
>> Feb 19 15:48:33 localhost abrtd: Getting local universal unique 
>> identification...
>> Feb 19 15:48:33 localhost abrtd: New crash, saving
>> Feb 19 15:48:33 localhost abrtd: 
>> RunApp('/var/cache/abrt/ccpp-1266565711-1639','test x"`cat component`" = 
>> x"xorg-x11-server-Xorg" && cp /var/log/Xorg.0.log .')
>>
>>
>> If I put following content on vm06_wser08 ; (cd.xml)
>> <disk type="block" device="cdrom">
>> <target dev="hdc" bus="ide"/>
>> <readonly/>
>> <source dev="/dev/sr0"/>
>> </disk>
>>
>>
>> Then it works.  CDWriter can be attached to Vista.  But I must insert 
>> the CD on the drive before starting vm06_wser08.  Otherwises it complains.
> 
> I second this bug report. Just yesterday I tried to attach a CDROM to an 
> already-running WinXP guest under qemu-0.12.1.2 with libvirt 0.7.5 using 
> virt-manager 0.8.2. virt-manager immediately dropped its connection and 
> refused to re-connect to the libvirtd socket. Futher investigation 
> showed that the libvirtd process had died.
> 
> Restarting libvirtd, stopping the VM, attaching the CDROM again, and 
> then re-starting the VM from scratch made the CDROM visible within the 
> guest, suggesting there is something not quite right with the dynamic 
> device attachment mechanism in libvirt.
> 

FYI, libvirt issues shouldn't be reported here: libvirt-list@redhat.com
is better.

I can't reproduce with libvirt 0.7.6. If either of you can still
reproduce, can you run libvirtd under gdb, reproduce the crash, and
report a backtrace? More info here:

http://fedoraproject.org/wiki/StackTraces

Thanks,
Cole