[libvirt PATCH] qemu: Fix memstat for (non-)transitional memballoon

[Andrea Bolognani]

Depending on the memballoon model, the corresponding QOM node
will have a different type and we need to account for this
when searching for it in the QOM tree.

https://bugzilla.redhat.com/show_bug.cgi?id=1911786
Signed-off-by: Andrea Bolognani <abologna at redhat.com>
---
 src/qemu/qemu_monitor.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index b5c0364652..c97dadd11e 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -1017,7 +1017,27 @@ qemuMonitorInitBalloonObjectPath(qemuMonitorPtr mon,
 
     switch (balloon->info.type) {
     case VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI:
-        name = "virtio-balloon-pci";
+        switch (balloon->model) {
+            case VIR_DOMAIN_MEMBALLOON_MODEL_VIRTIO:
+                name = "virtio-balloon-pci";
+                break;
+            case VIR_DOMAIN_MEMBALLOON_MODEL_VIRTIO_TRANSITIONAL:
+                name = "virtio-balloon-pci-transitional";
+                break;
+            case VIR_DOMAIN_MEMBALLOON_MODEL_VIRTIO_NON_TRANSITIONAL:
+                name = "virtio-balloon-pci-non-transitional";
+                break;
+            case VIR_DOMAIN_MEMBALLOON_MODEL_XEN:
+            case VIR_DOMAIN_MEMBALLOON_MODEL_NONE:
+                virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                        _("invalid model for virtio-balloon-pci"));
+                return;
+            case VIR_DOMAIN_MEMBALLOON_MODEL_LAST:
+            default:
+                virReportEnumRangeError(virDomainMemballoonModel,
+                                        balloon->model);
+                return;
+        }
         break;
     case VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW:
         name = "virtio-balloon-ccw";
-- 
2.26.2