[Xen-devel] xenstore and "my domid" on hvm guest

["Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx>]

It appears that if an hvm guest has /proc/xen/xenbus, the
xenstore-* tools can be made to work inside this guest.
For example, inside an hvm guest which (according to
"xm list" in domain0) has a domid of 2, I can do:

# xenstore-ls /local/domain/2

and it works fine, whereas:

# xenstore-ls /local/domain/0

fails properly with "Permission denied".

So I can use xenstore-read and xenstore-write inside the
guest but I need to know "my" domid to do so.

Is there any way from inside the guest to determine
its domid?  Alternately, is there any syntax for the
xenstore tools that allows me to refer to "self"?

By using xenstore-exists repeatedly marching through the
numerals, I can figure it out, but is there a better
way?

Thanks,
Dan

===================================
Thanks... for the memory
I really could use more / My throughput's on the floor
The balloon is flat / My swap disk's fat / I've OOM's in store
Overcommitted so much
(with apologies to the late great Bob Hope)

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