[libvirt] [PATCH 3/3] qemu: domain: Fix backing store terminator for non-backing local files

[Peter Krempa]

Raw local files do not pass through the backing store detector and thus
the code did not allocate the required backing store terminator for
them. Previously the terminating element would be formatted into the XML
since the default values used for the metadata allowed that. This is a
regression since a693fdba0111ff which was not detected in the review.

This patch also reverts all the changes in the test files.
---
 src/qemu/qemu_domain.c                                               | 5 +++++
 .../qemuhotplugtestdomains/qemuhotplug-base-ccw-live+ccw-virtio.xml  | 1 +
 ...uhotplug-base-ccw-live-with-2-ccw-virtio+ccw-virtio-1-reverse.xml | 2 ++
 .../qemuhotplug-base-ccw-live-with-2-ccw-virtio.xml                  | 1 +
 ...muhotplug-base-ccw-live-with-ccw-virtio+ccw-virtio-2-explicit.xml | 1 +
 .../qemuhotplug-base-ccw-live-with-ccw-virtio+ccw-virtio-2.xml       | 1 +
 .../qemuhotplug-base-live+disk-scsi-wwn+disk-scsi-duplicate-wwn.xml  | 1 +
 tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-scsi.xml     | 1 +
 tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-usb.xml      | 1 +
 tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-virtio.xml   | 1 +
 .../qemuhotplug-base-without-scsi-controller-live+disk-scsi-2.xml    | 1 +
 11 files changed, 16 insertions(+)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 0cdcb11c37..82671d99c6 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -6167,6 +6167,11 @@ qemuDomainDetermineDiskChain(virQEMUDriverPtr driver,
             goto cleanup;
         }

+        /* terminate the chain for such images as the code below would do */
+        if (!src->backingStore &&
+            VIR_ALLOC(src->backingStore) < 0)
+            goto cleanup;
+
         ret = 0;
         goto cleanup;
     }
diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live+ccw-virtio.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live+ccw-virtio.xml
index 0fa8d036b9..cd03d0e09b 100644
--- a/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live+ccw-virtio.xml
+++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live+ccw-virtio.xml
@@ -22,6 +22,7 @@
     <disk type='file' device='disk'>
       <driver name='qemu' type='raw' cache='none'/>
       <source file='/dev/null'/>
+      <backingStore/>
       <target dev='vde' bus='virtio'/>
       <readonly/>
       <shareable/>
diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-2-ccw-virtio+ccw-virtio-1-reverse.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-2-ccw-virtio+ccw-virtio-1-reverse.xml
index 135427fff5..7be75f977b 100644
--- a/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-2-ccw-virtio+ccw-virtio-1-reverse.xml
+++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-2-ccw-virtio+ccw-virtio-1-reverse.xml
@@ -22,6 +22,7 @@
     <disk type='file' device='disk'>
       <driver name='qemu' type='raw' cache='none'/>
       <source file='/dev/null'/>
+      <backingStore/>
       <target dev='hda' bus='virtio'/>
       <readonly/>
       <shareable/>
@@ -31,6 +32,7 @@
     <disk type='file' device='disk'>
       <driver name='qemu' type='raw' cache='none'/>
       <source file='/dev/null'/>
+      <backingStore/>
       <target dev='hdb' bus='virtio'/>
       <readonly/>
       <shareable/>
diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-2-ccw-virtio.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-2-ccw-virtio.xml
index e17c4e43b2..a83f1b5d73 100644
--- a/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-2-ccw-virtio.xml
+++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-2-ccw-virtio.xml
@@ -22,6 +22,7 @@
     <disk type='file' device='disk'>
       <driver name='qemu' type='raw' cache='none'/>
       <source file='/dev/null'/>
+      <backingStore/>
       <target dev='hda' bus='virtio'/>
       <readonly/>
       <shareable/>
diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-ccw-virtio+ccw-virtio-2-explicit.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-ccw-virtio+ccw-virtio-2-explicit.xml
index 326d312fa9..3e90207519 100644
--- a/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-ccw-virtio+ccw-virtio-2-explicit.xml
+++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-ccw-virtio+ccw-virtio-2-explicit.xml
@@ -22,6 +22,7 @@
     <disk type='file' device='disk'>
       <driver name='qemu' type='raw' cache='none'/>
       <source file='/dev/null'/>
+      <backingStore/>
       <target dev='hda' bus='virtio'/>
       <readonly/>
       <shareable/>
diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-ccw-virtio+ccw-virtio-2.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-ccw-virtio+ccw-virtio-2.xml
index 326d312fa9..3e90207519 100644
--- a/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-ccw-virtio+ccw-virtio-2.xml
+++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-ccw-live-with-ccw-virtio+ccw-virtio-2.xml
@@ -22,6 +22,7 @@
     <disk type='file' device='disk'>
       <driver name='qemu' type='raw' cache='none'/>
       <source file='/dev/null'/>
+      <backingStore/>
       <target dev='hda' bus='virtio'/>
       <readonly/>
       <shareable/>
diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-scsi-wwn+disk-scsi-duplicate-wwn.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-scsi-wwn+disk-scsi-duplicate-wwn.xml
index 16caeb3542..4c3ea3202b 100644
--- a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-scsi-wwn+disk-scsi-duplicate-wwn.xml
+++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-scsi-wwn+disk-scsi-duplicate-wwn.xml
@@ -33,6 +33,7 @@
     <disk type='file' device='disk'>
       <driver name='qemu' type='raw' cache='none'/>
       <source file='/dev/null'/>
+      <backingStore/>
       <target dev='sdg' bus='scsi'/>
       <readonly/>
       <shareable/>
diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-scsi.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-scsi.xml
index a6dbf0b1bd..493a615fd3 100644
--- a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-scsi.xml
+++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-scsi.xml
@@ -22,6 +22,7 @@
     <disk type='file' device='disk'>
       <driver name='qemu' type='raw' cache='none'/>
       <source file='/dev/null'/>
+      <backingStore/>
       <target dev='sdf' bus='scsi'/>
       <readonly/>
       <shareable/>
diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-usb.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-usb.xml
index 6ccb88f140..3609819ea3 100644
--- a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-usb.xml
+++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-usb.xml
@@ -22,6 +22,7 @@
     <disk type='file' device='disk'>
       <driver name='qemu' type='raw' cache='none'/>
       <source file='/dev/null'/>
+      <backingStore/>
       <target dev='sdq' bus='usb'/>
       <readonly/>
       <shareable/>
diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-virtio.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-virtio.xml
index b97c0b41e2..b88b220e33 100644
--- a/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-virtio.xml
+++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-live+disk-virtio.xml
@@ -22,6 +22,7 @@
     <disk type='file' device='disk'>
       <driver name='qemu' type='raw' cache='none'/>
       <source file='/dev/null'/>
+      <backingStore/>
       <target dev='vde' bus='virtio'/>
       <readonly/>
       <shareable/>
diff --git a/tests/qemuhotplugtestdomains/qemuhotplug-base-without-scsi-controller-live+disk-scsi-2.xml b/tests/qemuhotplugtestdomains/qemuhotplug-base-without-scsi-controller-live+disk-scsi-2.xml
index 6422e1640d..c12d18f716 100644
--- a/tests/qemuhotplugtestdomains/qemuhotplug-base-without-scsi-controller-live+disk-scsi-2.xml
+++ b/tests/qemuhotplugtestdomains/qemuhotplug-base-without-scsi-controller-live+disk-scsi-2.xml
@@ -22,6 +22,7 @@
     <disk type='file' device='disk'>
       <driver name='qemu' type='raw' cache='none'/>
       <source file='/dev/null'/>
+      <backingStore/>
       <target dev='sdf' bus='scsi'/>
       <readonly/>
       <shareable/>
-- 
2.14.3