Re: [libvirt PATCH 17/20] virdomainmomentobjlist: introduce virDomainMomentIsAncestor

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On Mon, Mar 13, 2023 at 16:42:18 +0100, Pavel Hrdina wrote:
> This new helper will allow us to check if we are able to delete external
> snapshot after user did revert to non-leaf snapshot.
> 
> Signed-off-by: Pavel Hrdina <phrdina@xxxxxxxxxx>
> ---
>  src/conf/virdomainmomentobjlist.c | 21 +++++++++++++++++++++
>  src/conf/virdomainmomentobjlist.h |  4 ++++
>  src/libvirt_private.syms          |  1 +
>  3 files changed, 26 insertions(+)
> 
> diff --git a/src/conf/virdomainmomentobjlist.c b/src/conf/virdomainmomentobjlist.c
> index f19ec3319a..0c520fb173 100644
> --- a/src/conf/virdomainmomentobjlist.c
> +++ b/src/conf/virdomainmomentobjlist.c
> @@ -582,3 +582,24 @@ virDomainMomentFindLeaf(virDomainMomentObjList *list)
>          return moment;
>      return NULL;
>  }
> +
> +
> +bool
> +virDomainMomentIsAncestor(virDomainMomentObj *moment,
> +                          virDomainMomentObj *ancestor)
> +{
> +    if (!moment)
> +        return false;

for (moment = moment->parent; moment; moment = moment->parent) {
    if (moment == ancestor)
        return true;
}

return false;

This should be sufficient IIUC to replace the condition and the loop,
right?

Either way:

Reviewed-by: Peter Krempa <pkrempa@xxxxxxxxxx>

Consider documenting expectations though.




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