[Xen-users] Find domID from domU

[Pepe Barbe <elventear@xxxxxxxxx>]

Hello,

I am trying to write a script to add to the proper bridge any vif that  
is brought up trying to use a domU as a backend.
After much researching, I don't know if I have found the proper  
solution but, at least, a viable one.
I see that I can read the bridge name in xenstore from the following  
key:
/local/domain/<domid>/backend/vif/<vif num>/bridge

But I have found two obstacles to this solution.

First, by default a domU cannot list /local/domain, so the only way to  
find my domID would be to guess, up to the maximum number of domain  
IDs that Xen can have, which is a horrid solution. I can change the  
permissions so that key can be listed, and then I can try to read the  
different domain IDs until one succeeds, which would be a better way  
of guessing my own domID.
So my question is. Is there a deterministic way of reading the proper  
key /local/domain/<domid>/backend/vif/<vif num>/bridge from the domU,  
or a way to determine my domID in a deterministic fashion or change  
the the default permissions, so that if I ever reboot my dom0 I can  
bring everything back automatically.
Thanks,
Pepe

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users