[Xen-devel] Xen 4.2.0: unable to add disk devices

[Fabiano Francesconi <fabiano.francesconi@xxxxxxxxx>]

Hello everybody, 
I think I've screwed up today. I was trying to fix a malfunctioning domU and I 
ended up issuing xenstore-rm {/local,/vm}.

I feel like an idiot that did something really wrong. Since that, all the my 
virtual machines cannot start anymore.

What I get is:

xevelon ~ # xl cr -c /xen/configs/aquaria 
Parsing config from /xen/configs/aquaria
libxl: error: libxl_device.c:858:device_backend_callback: unable to disconnect 
device with path /local/domain/0/backend/vbd/12/51713
libxl: error: libxl_device.c:858:device_backend_callback: unable to disconnect 
device with path /local/domain/0/backend/vbd/12/51714
libxl: error: libxl_device.c:858:device_backend_callback: unable to disconnect 
device with path /local/domain/0/backend/vbd/12/51715
libxl: error: libxl_device.c:858:device_backend_callback: unable to disconnect 
device with path /local/domain/0/backend/vbd/12/51728
libxl: error: libxl_create.c:933:domcreate_launch_dm: unable to add disk devices
libxl: error: libxl_device.c:858:device_backend_callback: unable to disconnect 
device with path /local/domain/0/backend/vbd/12/51713
libxl: error: libxl_device.c:858:device_backend_callback: unable to disconnect 
device with path /local/domain/0/backend/vbd/12/51714
libxl: error: libxl_device.c:858:device_backend_callback: unable to disconnect 
device with path /local/domain/0/backend/vbd/12/51715
libxl: error: libxl_device.c:858:device_backend_callback: unable to disconnect 
device with path /local/domain/0/backend/vbd/12/51728
libxl: error: libxl.c:1465:devices_destroy_cb: libxl__devices_destroy failed 
for 12


And if I take a look at xenstored:

xevelon ~ # xenstore-ls -fp
/tool = "" (n0)
/tool/xenstored = "" (n0)
/libxl = "" (n0)
/vm = "" (n0)
/local = "" (n0)
/local/domain = "" (n0)
/local/domain/0 = "" (n0)
/local/domain/0/name = "Domain-0" (n0)
/local/domain/0/libxl = "" (n0)
/local/domain/0/libxl/disable_udev = "1" (n0)

Obviously something is wrong here. I've no data about the dom0, no information 
about the backend. Is there a way to reload all the stuff I've removed?

Thank you very much  

-- 
Fabiano Francesconi [GPG key: 0x81E53461]



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