tests: qemu: Add test data for backing chains and indexes

Add test data for nested backing chains with/without indexes (used in
status XMLs) which will excercise blockdev and the related work.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJán Tomko <jtomko@redhat.com>

tests/qemuxml2argvdata/disk-backing-chains-index.x86_64-2.12.0.args

+disk-backing-chains-noindex.x86_64-2.12.0.args
\ No newline at end of file

tests/qemuxml2argvdata/disk-backing-chains-index.x86_64-latest.args

+disk-backing-chains-noindex.x86_64-latest.args
\ No newline at end of file

tests/qemuxml2argvdata/disk-backing-chains-index.xml

+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-i686</emulator>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source protocol='gluster' name='Volume2/Image'>
+        <host transport='unix' socket='/path/to/sock'/>
+      </source>
+      <backingStore type='file' index='1'>
+        <format type='qcow2'/>
+        <source file='/tmp/missing-backing-store.qcow'/>
+      </backingStore>
+      <target dev='vda' bus='virtio'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source protocol='nbd' name='bar'>
+        <host transport='unix' socket='/var/run/nbdsock'/>
+      </source>
+      <backingStore type='block' index='8'>
+        <format type='qcow2'/>
+        <source dev='/dev/HostVG/QEMUGuest1'/>
+        <backingStore type='file' index='7'>
+          <format type='vmdk'/>
+          <source file='/tmp/image2'/>
+          <backingStore type='file' index='6'>
+            <format type='qcow2'/>
+            <source file='/tmp/image3.qcow'/>
+            <backingStore type='file' index='5'>
+              <format type='qcow2'/>
+              <source file='/tmp/image4.qcow'>
+              </source>
+              <backingStore type='file' index='4'>
+                <source file='/tmp/image5.qcow'/>
+                <format type='qcow2'/>
+                <backingStore type='file' index='3'>
+                  <format type='raw'/>
+                  <source file='/tmp/Fedora-17-x86_64-Live-KDE.iso'/>
+                  <backingStore/>
+                </backingStore>
+              </backingStore>
+            </backingStore>
+          </backingStore>
+        </backingStore>
+      </backingStore>
+      <target dev='vdb' bus='virtio'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='raw'/>
+      <backingStore/>
+      <source protocol='gluster' name='Volume1/Image'>
+        <host name='example.org' port='6000'/>
+      </source>
+      <target dev='vdc' bus='virtio'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <auth username='myname'>
+        <secret type='ceph' usage='mycluster_myname'/>
+      </auth>
+      <source protocol='rbd' name='pool/image'>
+        <host name='mon1.example.org' port='6321'/>
+        <host name='mon2.example.org' port='6322'/>
+        <host name='mon3.example.org' port='6322'/>
+      </source>
+      <backingStore type='file' index='11'>
+        <source file='/tmp/image.qcow'/>
+        <backingStore/>
+        <format type='qcow2'/>
+      </backingStore>
+      <target dev='vdd' bus='virtio'/>
+    </disk>
+    <disk type='block' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source dev='/dev/HostVG/QEMUGuest11'/>
+      <target dev='vde' bus='virtio'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source file='/var/lib/libvirt/images/rhel7.1484071880'/>
+      <backingStore type='file' index='24'>
+        <format type='qcow2'/>
+        <source file='/var/lib/libvirt/images/rhel7.1484071877'/>
+        <backingStore type='file' index='23'>
+          <format type='qcow2'/>
+          <source file='/var/lib/libvirt/images/rhel7.1484071876'/>
+          <backingStore type='file' index='22'>
+            <format type='qcow2'/>
+            <source file='/var/lib/libvirt/images/rhel7.1484071872'/>
+            <backingStore type='file' index='21'>
+              <format type='qcow2'/>
+              <source file='/var/lib/libvirt/images/rhel7.1483615252'/>
+              <backingStore type='file' index='20'>
+                <format type='qcow2'/>
+                <source file='/var/lib/libvirt/images/rhel7.1483605924'/>
+                <backingStore type='file' index='19'>
+                  <format type='qcow2'/>
+                  <source file='/var/lib/libvirt/images/rhel7.1483605920'/>
+                  <backingStore type='file' index='18'>
+                    <format type='qcow2'/>
+                    <source file='/var/lib/libvirt/images/rhel7.1483546244'/>
+                    <backingStore type='file' index='17'>
+                      <format type='qcow2'/>
+                      <source file='/var/lib/libvirt/images/rhel7.1483545901'/>
+                      <backingStore type='file' index='16'>
+                        <format type='qcow2'/>
+                        <source file='/var/lib/libvirt/images/rhel7.1483545313'/>
+                        <backingStore type='file' index='15'>
+                          <format type='qcow2'/>
+                          <source file='/var/lib/libvirt/images/rhel7.1483536402'/>
+                          <backingStore type='file' index='14'>
+                            <format type='qcow2'/>
+                            <source file='/var/lib/libvirt/images/rhel7.qcow2'/>
+                            <backingStore/>
+                          </backingStore>
+                        </backingStore>
+                      </backingStore>
+                    </backingStore>
+                  </backingStore>
+                </backingStore>
+              </backingStore>
+            </backingStore>
+          </backingStore>
+        </backingStore>
+      </backingStore>
+      <target dev='vdf' bus='virtio'/>
+    </disk>
+    <controller type='usb' index='0'/>
+    <controller type='pci' index='0' model='pci-root'/>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>

tests/qemuxml2argvdata/disk-backing-chains-noindex.x86_64-2.12.0.args

+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-i686 \
+-name guest=QEMUGuest1,debug-threads=on \
+-S \
+-object secret,id=masterKey0,format=raw,\
+file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
+-machine pc-i440fx-2.12,accel=tcg,usb=off,dump-guest-core=off \
+-m 214 \
+-realtime mlock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server,nowait \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-no-acpi \
+-boot strict=on \
+-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \
+-drive 'file=gluster+unix:///Volume2/Image?socket=/path/to/sock,file.debug=4,\
+format=qcow2,if=none,id=drive-virtio-disk0' \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x2,drive=drive-virtio-disk0,\
+id=virtio-disk0,bootindex=1 \
+-drive file=nbd:unix:/var/run/nbdsock:exportname=bar,format=qcow2,if=none,\
+id=drive-virtio-disk1 \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x3,drive=drive-virtio-disk1,\
+id=virtio-disk1 \
+-drive file=gluster://example.org:6000/Volume1/Image,file.debug=4,format=raw,\
+if=none,id=drive-virtio-disk2 \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk2,\
+id=virtio-disk2 \
+-object secret,id=virtio-disk3-secret0,\
+data=9eao5F8qtkGt+seB1HYivWIxbtwUu6MQtg1zpj/oDtUsPr1q8wBYM91uEHCn6j/1,\
+keyid=masterKey0,iv=AAECAwQFBgcICQoLDA0ODw==,format=base64 \
+-drive 'file=rbd:pool/image:id=myname:auth_supported=cephx\;none:\
+mon_host=mon1.example.org\:6321\;mon2.example.org\:6322\;mon3.example.org\:\
+6322,file.password-secret=virtio-disk3-secret0,format=qcow2,if=none,\
+id=drive-virtio-disk3' \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk3,\
+id=virtio-disk3 \
+-drive file=/dev/HostVG/QEMUGuest11,format=qcow2,if=none,id=drive-virtio-disk4 \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk4,\
+id=virtio-disk4 \
+-drive file=/var/lib/libvirt/images/rhel7.1484071880,format=qcow2,if=none,\
+id=drive-virtio-disk5 \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk5,\
+id=virtio-disk5 \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x8 \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
+resourcecontrol=deny \
+-msg timestamp=on

tests/qemuxml2argvdata/disk-backing-chains-noindex.x86_64-latest.args

+LC_ALL=C \
+PATH=/bin \
+HOME=/home/test \
+USER=test \
+LOGNAME=test \
+QEMU_AUDIO_DRV=none \
+/usr/bin/qemu-system-i686 \
+-name guest=QEMUGuest1,debug-threads=on \
+-S \
+-object secret,id=masterKey0,format=raw,\
+file=/tmp/lib/domain--1-QEMUGuest1/master-key.aes \
+-machine pc,accel=tcg,usb=off,dump-guest-core=off \
+-m 214 \
+-realtime mlock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server,nowait \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-no-acpi \
+-boot strict=on \
+-device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 \
+-drive 'file=gluster+unix:///Volume2/Image?socket=/path/to/sock,file.debug=4,\
+format=qcow2,if=none,id=drive-virtio-disk0' \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x2,drive=drive-virtio-disk0,\
+id=virtio-disk0,bootindex=1 \
+-drive file=nbd:unix:/var/run/nbdsock:exportname=bar,format=qcow2,if=none,\
+id=drive-virtio-disk1 \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x3,drive=drive-virtio-disk1,\
+id=virtio-disk1 \
+-drive file=gluster://example.org:6000/Volume1/Image,file.debug=4,format=raw,\
+if=none,id=drive-virtio-disk2 \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk2,\
+id=virtio-disk2 \
+-object secret,id=virtio-disk3-secret0,\
+data=9eao5F8qtkGt+seB1HYivWIxbtwUu6MQtg1zpj/oDtUsPr1q8wBYM91uEHCn6j/1,\
+keyid=masterKey0,iv=AAECAwQFBgcICQoLDA0ODw==,format=base64 \
+-drive 'file=rbd:pool/image:id=myname:auth_supported=cephx\;none:\
+mon_host=mon1.example.org\:6321\;mon2.example.org\:6322\;mon3.example.org\:\
+6322,file.password-secret=virtio-disk3-secret0,format=qcow2,if=none,\
+id=drive-virtio-disk3' \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk3,\
+id=virtio-disk3 \
+-drive file=/dev/HostVG/QEMUGuest11,format=qcow2,if=none,id=drive-virtio-disk4 \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x6,drive=drive-virtio-disk4,\
+id=virtio-disk4 \
+-drive file=/var/lib/libvirt/images/rhel7.1484071880,format=qcow2,if=none,\
+id=drive-virtio-disk5 \
+-device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x7,drive=drive-virtio-disk5,\
+id=virtio-disk5 \
+-device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x8 \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,\
+resourcecontrol=deny \
+-msg timestamp=on

tests/qemuxml2argvdata/disk-backing-chains-noindex.xml

+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-i686</emulator>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source protocol='gluster' name='Volume2/Image'>
+        <host transport='unix' socket='/path/to/sock'/>
+      </source>
+      <backingStore type='file'>
+        <format type='qcow2'/>
+        <source file='/tmp/missing-backing-store.qcow'/>
+      </backingStore>
+      <target dev='vda' bus='virtio'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source protocol='nbd' name='bar'>
+        <host transport='unix' socket='/var/run/nbdsock'/>
+      </source>
+      <backingStore type='block'>
+        <format type='qcow2'/>
+        <source dev='/dev/HostVG/QEMUGuest1'/>
+        <backingStore type='file'>
+          <format type='vmdk'/>
+          <source file='/tmp/image2'/>
+          <backingStore type='file'>
+            <format type='qcow2'/>
+            <source file='/tmp/image3.qcow'/>
+            <backingStore type='file'>
+              <format type='qcow2'/>
+              <source file='/tmp/image4.qcow'>
+              </source>
+              <backingStore type='file'>
+                <source file='/tmp/image5.qcow'/>
+                <format type='qcow2'/>
+                <backingStore type='file'>
+                  <format type='raw'/>
+                  <source file='/tmp/Fedora-17-x86_64-Live-KDE.iso'/>
+                  <backingStore/>
+                </backingStore>
+              </backingStore>
+            </backingStore>
+          </backingStore>
+        </backingStore>
+      </backingStore>
+      <target dev='vdb' bus='virtio'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='raw'/>
+      <backingStore/>
+      <source protocol='gluster' name='Volume1/Image'>
+        <host name='example.org' port='6000'/>
+      </source>
+      <target dev='vdc' bus='virtio'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <auth username='myname'>
+        <secret type='ceph' usage='mycluster_myname'/>
+      </auth>
+      <source protocol='rbd' name='pool/image'>
+        <host name='mon1.example.org' port='6321'/>
+        <host name='mon2.example.org' port='6322'/>
+        <host name='mon3.example.org' port='6322'/>
+      </source>
+      <backingStore type='file'>
+        <source file='/tmp/image.qcow'/>
+        <backingStore/>
+        <format type='qcow2'/>
+      </backingStore>
+      <target dev='vdd' bus='virtio'/>
+    </disk>
+    <disk type='block' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source dev='/dev/HostVG/QEMUGuest11'/>
+      <target dev='vde' bus='virtio'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source file='/var/lib/libvirt/images/rhel7.1484071880'/>
+      <backingStore type='file'>
+        <format type='qcow2'/>
+        <source file='/var/lib/libvirt/images/rhel7.1484071877'/>
+        <backingStore type='file'>
+          <format type='qcow2'/>
+          <source file='/var/lib/libvirt/images/rhel7.1484071876'/>
+          <backingStore type='file'>
+            <format type='qcow2'/>
+            <source file='/var/lib/libvirt/images/rhel7.1484071872'/>
+            <backingStore type='file'>
+              <format type='qcow2'/>
+              <source file='/var/lib/libvirt/images/rhel7.1483615252'/>
+              <backingStore type='file'>
+                <format type='qcow2'/>
+                <source file='/var/lib/libvirt/images/rhel7.1483605924'/>
+                <backingStore type='file'>
+                  <format type='qcow2'/>
+                  <source file='/var/lib/libvirt/images/rhel7.1483605920'/>
+                  <backingStore type='file'>
+                    <format type='qcow2'/>
+                    <source file='/var/lib/libvirt/images/rhel7.1483546244'/>
+                    <backingStore type='file'>
+                      <format type='qcow2'/>
+                      <source file='/var/lib/libvirt/images/rhel7.1483545901'/>
+                      <backingStore type='file'>
+                        <format type='qcow2'/>
+                        <source file='/var/lib/libvirt/images/rhel7.1483545313'/>
+                        <backingStore type='file'>
+                          <format type='qcow2'/>
+                          <source file='/var/lib/libvirt/images/rhel7.1483536402'/>
+                          <backingStore type='file'>
+                            <format type='qcow2'/>
+                            <source file='/var/lib/libvirt/images/rhel7.qcow2'/>
+                            <backingStore/>
+                          </backingStore>
+                        </backingStore>
+                      </backingStore>
+                    </backingStore>
+                  </backingStore>
+                </backingStore>
+              </backingStore>
+            </backingStore>
+          </backingStore>
+        </backingStore>
+      </backingStore>
+      <target dev='vdf' bus='virtio'/>
+    </disk>
+    <controller type='usb'/>
+    <controller type='pci' model='pci-root'/>
+    <memballoon model='virtio'/>
+  </devices>
+</domain>

tests/qemuxml2argvtest.c

@@ -1218,6 +1218,10 @@ mymain(void)
                         QEMU_CAPS_ICH9_AHCI);
     DO_TEST_PARSE_ERROR("disk-scsi-incompatible-address",
                         QEMU_CAPS_VIRTIO_SCSI);
+    DO_TEST_CAPS_VER("disk-backing-chains-index", "2.12.0");
+    DO_TEST_CAPS_LATEST("disk-backing-chains-index");
+    DO_TEST_CAPS_VER("disk-backing-chains-noindex", "2.12.0");
+    DO_TEST_CAPS_LATEST("disk-backing-chains-noindex");
 
     DO_TEST("graphics-egl-headless",
             QEMU_CAPS_EGL_HEADLESS,

tests/qemuxml2xmloutdata/disk-backing-chains-index-active.xml

+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-i686</emulator>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source protocol='gluster' name='Volume2/Image'>
+        <host transport='unix' socket='/path/to/sock'/>
+      </source>
+      <target dev='vda' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source protocol='nbd' name='bar'>
+        <host transport='unix' socket='/var/run/nbdsock'/>
+      </source>
+      <target dev='vdb' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='raw'/>
+      <source protocol='gluster' name='Volume1/Image'>
+        <host name='example.org' port='6000'/>
+      </source>
+      <target dev='vdc' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <auth username='myname'>
+        <secret type='ceph' usage='mycluster_myname'/>
+      </auth>
+      <source protocol='rbd' name='pool/image'>
+        <host name='mon1.example.org' port='6321'/>
+        <host name='mon2.example.org' port='6322'/>
+        <host name='mon3.example.org' port='6322'/>
+      </source>
+      <target dev='vdd' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
+    </disk>
+    <disk type='block' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source dev='/dev/HostVG/QEMUGuest11'/>
+      <target dev='vde' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source file='/var/lib/libvirt/images/rhel7.1484071880'/>
+      <target dev='vdf' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
+    </disk>
+    <controller type='usb' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <memballoon model='virtio'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
+    </memballoon>
+  </devices>
+</domain>

tests/qemuxml2xmloutdata/disk-backing-chains-index-inactive.xml

+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-i686</emulator>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source protocol='gluster' name='Volume2/Image'>
+        <host transport='unix' socket='/path/to/sock'/>
+      </source>
+      <target dev='vda' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source protocol='nbd' name='bar'>
+        <host transport='unix' socket='/var/run/nbdsock'/>
+      </source>
+      <target dev='vdb' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='raw'/>
+      <source protocol='gluster' name='Volume1/Image'>
+        <host name='example.org' port='6000'/>
+      </source>
+      <target dev='vdc' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <auth username='myname'>
+        <secret type='ceph' usage='mycluster_myname'/>
+      </auth>
+      <source protocol='rbd' name='pool/image'>
+        <host name='mon1.example.org' port='6321'/>
+        <host name='mon2.example.org' port='6322'/>
+        <host name='mon3.example.org' port='6322'/>
+      </source>
+      <target dev='vdd' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
+    </disk>
+    <disk type='block' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source dev='/dev/HostVG/QEMUGuest11'/>
+      <target dev='vde' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source file='/var/lib/libvirt/images/rhel7.1484071880'/>
+      <target dev='vdf' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
+    </disk>
+    <controller type='usb' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <memballoon model='virtio'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
+    </memballoon>
+  </devices>
+</domain>

tests/qemuxml2xmloutdata/disk-backing-chains-noindex-active.xml

+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-i686</emulator>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source protocol='gluster' name='Volume2/Image'>
+        <host transport='unix' socket='/path/to/sock'/>
+      </source>
+      <target dev='vda' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source protocol='nbd' name='bar'>
+        <host transport='unix' socket='/var/run/nbdsock'/>
+      </source>
+      <target dev='vdb' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='raw'/>
+      <source protocol='gluster' name='Volume1/Image'>
+        <host name='example.org' port='6000'/>
+      </source>
+      <target dev='vdc' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <auth username='myname'>
+        <secret type='ceph' usage='mycluster_myname'/>
+      </auth>
+      <source protocol='rbd' name='pool/image'>
+        <host name='mon1.example.org' port='6321'/>
+        <host name='mon2.example.org' port='6322'/>
+        <host name='mon3.example.org' port='6322'/>
+      </source>
+      <target dev='vdd' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
+    </disk>
+    <disk type='block' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source dev='/dev/HostVG/QEMUGuest11'/>
+      <target dev='vde' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source file='/var/lib/libvirt/images/rhel7.1484071880'/>
+      <target dev='vdf' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
+    </disk>
+    <controller type='usb' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <memballoon model='virtio'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
+    </memballoon>
+  </devices>
+</domain>

tests/qemuxml2xmloutdata/disk-backing-chains-noindex-inactive.xml

+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219136</memory>
+  <currentMemory unit='KiB'>219136</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-i686</emulator>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source protocol='gluster' name='Volume2/Image'>
+        <host transport='unix' socket='/path/to/sock'/>
+      </source>
+      <target dev='vda' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source protocol='nbd' name='bar'>
+        <host transport='unix' socket='/var/run/nbdsock'/>
+      </source>
+      <target dev='vdb' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='raw'/>
+      <source protocol='gluster' name='Volume1/Image'>
+        <host name='example.org' port='6000'/>
+      </source>
+      <target dev='vdc' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
+    </disk>
+    <disk type='network' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <auth username='myname'>
+        <secret type='ceph' usage='mycluster_myname'/>
+      </auth>
+      <source protocol='rbd' name='pool/image'>
+        <host name='mon1.example.org' port='6321'/>
+        <host name='mon2.example.org' port='6322'/>
+        <host name='mon3.example.org' port='6322'/>
+      </source>
+      <target dev='vdd' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
+    </disk>
+    <disk type='block' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source dev='/dev/HostVG/QEMUGuest11'/>
+      <target dev='vde' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2'/>
+      <source file='/var/lib/libvirt/images/rhel7.1484071880'/>
+      <target dev='vdf' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
+    </disk>
+    <controller type='usb' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <memballoon model='virtio'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
+    </memballoon>
+  </devices>
+</domain>

tests/qemuxml2xmltest.c

@@ -990,6 +990,8 @@ mymain(void)
     DO_TEST("panic-no-address", NONE);
 
     DO_TEST("disk-backing-chains", NONE);
+    DO_TEST("disk-backing-chains-index", NONE);
+    DO_TEST("disk-backing-chains-noindex", NONE);
 
     DO_TEST("chardev-label", NONE);