Re: [libvirt PATCH 2/2] qemu_snapshot: create: don't require disk-only flag for offline external snapshot

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On Tue, Jan 30, 2024 at 12:33:51 +0100, Pavel Hrdina wrote:
> Historically creating offline external snapshot required disk-only flag
> as well. Now when user requests new snapshot for offline VM and at least
> one disk is specified to use external snapshot we will no longer require
> disk-only flag as all other not specified disk will use external
> snapshots as well.
> 
> Resolves: https://issues.redhat.com/browse/RHEL-22797
> Signed-off-by: Pavel Hrdina <phrdina@xxxxxxxxxx>
> ---
>  src/qemu/qemu_snapshot.c | 14 ++++++++++++--
>  1 file changed, 12 insertions(+), 2 deletions(-)
> 
> diff --git a/src/qemu/qemu_snapshot.c b/src/qemu/qemu_snapshot.c
> index ab7b47319b..d089f70d4e 100644
> --- a/src/qemu/qemu_snapshot.c
> +++ b/src/qemu/qemu_snapshot.c
> @@ -1577,15 +1577,25 @@ qemuSnapshotCreateXMLValidateDef(virDomainObj *vm,
>  
>  
>  static bool
> -qemuSnapshotCreateUseExternal(virDomainSnapshotDef *def,
> +qemuSnapshotCreateUseExternal(virDomainObj *vm,
> +                              virDomainSnapshotDef *def,
>                                unsigned int flags)
>  {
> +    ssize_t i;

size_t, def->ndisks is also size_t

> +
>      if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY)
>          return true;
>  
>      if (def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL)
>          return true;
>  
> +    if (!virDomainObjIsActive(vm)) {
> +        for (i = 0; i < def->ndisks; i++) {

I'd mention that $OTHER_FUNCTION guarantees that we don't have a
combination of _LOCATION_INTERNAL and _LOCATION_EXTERNAL here.

Reviewed-by: Peter Krempa <pkrempa@xxxxxxxxxx>
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