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virDomainSetBlockThreshold: Document that two events are fired when index isn't used

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Libvirt started emitting two threshold events, once with index and once
withouth when the index isn't registered. Document this caveat.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Peter Krempa 2021-07-01 16:03:58 +02:00
parent a3edda6b9e
commit 0ba4066819
1 changed files with 4 additions and 0 deletions
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src/libvirt-domain.c
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@ -12637,6 +12637,10 @@ int virDomainGetGuestInfo(virDomainPtr domain,
* live VM XML for 'backingStore' or 'source' elements of a disk. If index is
* given the threshold is set for the corresponding image.
*
* In case when @dev does not contain index the
* VIR_DOMAIN_EVENT_ID_BLOCK_THRESHOLD event may be emitted twice, once for the
* disk device target without index and once containing the index.
*
* Note that the threshold event can be registered also for destinations of a
* 'virDomainBlockCopy' destination by using the 'index' of the 'mirror' source.
*