[libvirt] domain shutdown requests

[Christian Benvenuti (benve)]

When you shutdown a domain that is in PAUSED state, the shutdown will
not
take effect until you issue a resume cmd:

# virsh suspend <domain_name>

  <domain_name> is now PAUSED

# virsh shutdown <domain_name>

  <domain_name> does not shutdown, with the reason being that, for
  example in the case of a Linux Guest, the guest is not running and
  therefore there is no acpid running and able to process the shutdown
  request. Right?

If now we issue a resume

#virsh resume <domain_name>

  the guest initiates the (pending) shutdown (ie, acpid processes the
  pending request).

Is this the expected behavior?

Shouldn't virsh do something like this when it issues a shutdown
request?

  if (domain.state == PAUSED)
    resume(domain)
  
  shutdown(domain)

If yes, then I guess this logic should go
- into the cmdShutdown routine if we want to make it available to virsh
only,
or
- inside the driver's domainShutdown fn if we want to make it available
to any
  libvirt user.

One more minor comment.
As of now, "virsh list" (or 'virsh domstate <domain>') does not provide
any way of
knowing if
- a domain is being shutdown
or
- a domain has a pending shutdown request (like in the example above).

Would it make any sense to enhance the output of list/domstate , for
example to
show something like this when libvirt issues a shutdown to a running
domain

 Id Name                 State
----------------------------------
  3 FC15-2               running (shutdown in progress)

Or something like this when it issues a shutdown to a PAUSED domain?

Id Name                 State
----------------------------------
  3 FC15-2               PAUSED (shutdown request pending)

Thanks
/Chris