[libvirt] [PATCH 2/5] qemu: snapshot: Skip empty drives with internal snapshots

[Peter Krempa]

The code that validates whether an internal snapshot is possible would
reject an empty but not-readonly drive. Since floppies can have this
property, add a check for emptiness.
---
 src/qemu/qemu_driver.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 388af4f6f..e39de625d 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -13825,7 +13825,8 @@ qemuDomainSnapshotPrepare(virConnectPtr conn,

         case VIR_DOMAIN_SNAPSHOT_LOCATION_NONE:
             /* Remember seeing a disk that has snapshot disabled */
-            if (!dom_disk->src->readonly)
+            if (!virStorageSourceIsEmpty(dom_disk->src) &&
+                !dom_disk->src->readonly)
                 forbid_internal = true;
             break;

-- 
2.12.2