[libvirt] [PATCH 1/3] qemu: pass stop reason from qemuProcessStopCPUs to stop handler

[John Ferlan]

$SUBJ:

s/pass/Pass

On 10/10/18 4:04 AM, Nikolay Shirokovskiy wrote:
> We send duplicate suspended lifecycle events on qemu process stop in several
> places. The reason is stop event handler always send suspended event and
> we addidionally send same event but with more presise reason after call

*additionally
*precise

> to qemuProcessStopCPUs. Domain state change is also duplicated.
> 
> Let's change domain state and send event only in handler. For this
> purpuse first let's pass state change reason to event handler (event

*purpose

> reason is deducible from it).
> 
> Inspired by similar patch for resume: 5dab984ed
> "qemu: Pass running reason to RESUME event handler".
> 

In any case, I think the above was a bit more appropriate for the cover
since it details a few things being altered in the 3rd patch of the
series. So, maybe this could change to:

Similar to commit 5dab984ed which saves and passes the running reason to
the RESUME event handler, during qemuProcessStopCPUs let's save and pass
the pause reason in the domain private data so that the STOP event
handler can use it.

> Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy at virtuozzo.com>
> ---
>  src/qemu/qemu_domain.h  |  4 ++++
>  src/qemu/qemu_process.c | 15 ++++++++++++---
>  2 files changed, 16 insertions(+), 3 deletions(-)
> 
> diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
> index 80bd4bd..380ea14 100644
> --- a/src/qemu/qemu_domain.h
> +++ b/src/qemu/qemu_domain.h
> @@ -370,6 +370,10 @@ struct _qemuDomainObjPrivate {
>      /* qemuProcessStartCPUs stores the reason for starting vCPUs here for the
>       * RESUME event handler to use it */
>      virDomainRunningReason runningReason;
> +
> +    /* qemuProcessStopCPUs stores the reason for starting vCPUs here for the

s/starting/pausing/

too much copy-pasta

FWIW: Similar to the comment I made to Jirka for his series, I assume
this STOP processing would have the similar issue with the event going
to the old libvirtd and thus not needing to save/restore via XML state
processing. For context see:

https://www.redhat.com/archives/libvir-list/2018-September/msg01145.html

> +     * STOP event handler to use it */
> +    virDomainPausedReason pausedReason;
>  };
>  

With a couple of adjustments,

Reviewed-by: John Ferlan <jferlan at redhat.com>

John

I can make the adjustments so that you don't need to send another series
- just need your acknowledgment for that.