[libvirt] [PATCH] vz: Fix error messages in libvirt log caused by unhadled events
Nikolay Shirokovskiy
nshirokovskiy at parallels.com
Mon Jun 22 13:49:41 UTC 2015
On 22.06.2015 16:48, Maxim Nestratov wrote:
> 22.06.2015 16:44, Nikolay Shirokovskiy пишет:
>>
>> On 22.06.2015 16:00, Mikhail Feoktistov wrote:
>>> 22.06.2015 14:22, Maxim Nestratov пишет:
>>>> 22.06.2015 14:15, Mikhail Feoktistov пишет:
>>>>> We need to handle events with PIE_DISPATCHER type.
>>>> Could you please shed some more light on why we need this. I guess it fixes some problem, so more explanation could be useful.
>>> If the configuration of the instance has been modified, for example added disk or network device, then hypervisor
>>> sends event with prlIssuerType = PIE_DISPATCHER and EventType = PET_DSP_EVT_VM_CONFIG_CHANGED
>>> We should handle this event in prlsdkHandleVmEvent function to update instance's XML config.
>>>
>> This was breaked by my commit c71f5f8cee3fe4078c3ab8aa7c46de7210b468c6
>> The only event of issuer type PIE_VIRTUAL_MACHINE is performace event, all
>> others events issuer type is PIE_VIRTUAL_MACHINE. I was miguided
>> by event names:
>> PET_DSP_EVT_VM_PERFSTATS
>> PET_DSP_EVT_VM_UNREGISTERED
>>
>
> So what are others?
PIE_DISPATCHER
>
>>>>> Do not write error messages to log in case of unhandled event types.
>>>> Again, please explain why we shouldn't log them as errors if we return them as failure.
>>> prlsdkHandleVmEvent is a common handler and it recieves many events.
>>> We handle only part of them. In case we don't handle event, we return error code to a caller function,
>>> which should make a decision whether to write error message to log.
>> This also restores behaviour before named commit.
>>>>> ---
>>>>> src/parallels/parallels_sdk.c | 4 ++--
>>>>> 1 files changed, 2 insertions(+), 2 deletions(-)
>>>>>
>>>>> diff --git a/src/parallels/parallels_sdk.c b/src/parallels/parallels_sdk.c
>>>>> index 34605ea..d208c19 100644
>>>>> --- a/src/parallels/parallels_sdk.c
>>>>> +++ b/src/parallels/parallels_sdk.c
>>>>> @@ -1685,8 +1685,7 @@ prlsdkHandleVmEvent(parallelsConnPtr privconn, PRL_HANDLE prlEvent)
>>>>> return prlsdkHandleVmRemovedEvent(privconn, uuid);
>>>>> break;
>>>>> default:
>>>>> - virReportError(VIR_ERR_INTERNAL_ERROR,
>>>>> - _("Can't handle event of type %d"), prlEventType);
>>>>> + VIR_DEBUG("Skipping event type %d", prlEventType);
>>>>> return PRL_ERR_FAILURE;
>>>>> }
>>>>> @@ -1721,6 +1720,7 @@ prlsdkEventsHandler(PRL_HANDLE prlEvent, PRL_VOID_PTR opaque)
>>>>> switch (prlIssuerType) {
>>>>> case PIE_VIRTUAL_MACHINE:
>>>>> + case PIE_DISPATCHER:
>>>>> pret = prlsdkHandleVmEvent(privconn, prlEvent);
>>>>> break;
>>>>> default:
>
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