schema: Allow iSCSI source to have interleaved children

There is no need to require users to produce iSCSI disk source
following our ordering of children elements. In fact, we don't
even accept our own order in the schema :(.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Laine Stump <laine@redhat.com>

docs/schemas/domaincommon.rng

@@ -1772,6 +1772,7 @@
         <value>iscsi</value>
       </attribute>
       <attribute name="name"/>
+      <interleave>
         <ref name="diskSourceCommon"/>
         <ref name="diskSourceNetworkHost"/>
         <optional>
@@ -1783,6 +1784,7 @@
         <optional>
           <ref name="initiatorinfo"/>
         </optional>
+      </interleave>
     </element>
   </define>
 

tests/qemuxml2argvdata/disk-network-iscsi-modern.args

@@ -58,4 +58,11 @@ file.target=iqn.1992-01.com.example:server,file.lun=0,file.transport=tcp,\
 file.initiator-name=iqn.1992-01.com.example:client,format=raw,if=none,\
 id=drive-scsi0-0-0-1 \
 -device scsi-block,bus=scsi0.0,channel=0,scsi-id=0,lun=1,\
-drive=drive-scsi0-0-0-1,id=scsi0-0-0-1
+drive=drive-scsi0-0-0-1,id=scsi0-0-0-1 \
+-drive file.driver=iscsi,file.portal=example.org:3260,\
+file.target=iqn.1992-01.com.example:server,file.lun=0,file.transport=tcp,\
+file.user=myname,file.password-secret=AQCVn5hO6HzFAhAAq0NCv8jtJcIcE+HOBlMQ1A,\
+file.initiator-name=iqn.1992-01.com.example:client,format=raw,if=none,\
+id=drive-scsi0-0-0-2 \
+-device scsi-block,bus=scsi0.0,channel=0,scsi-id=0,lun=2,\
+drive=drive-scsi0-0-0-2,id=scsi0-0-0-2

tests/qemuxml2argvdata/disk-network-iscsi-modern.xml

@@ -65,6 +65,19 @@
       </source>
       <target dev='sdb' bus='scsi'/>
     </disk>
+    <disk type='network' device='lun'>
+      <driver name='qemu' type='raw'/>
+      <source protocol='iscsi' name='iqn.1992-01.com.example:server/0'>
+        <host name='example.org' port='3260'/>
+        <initiator>
+          <iqn name='iqn.1992-01.com.example:client'/>
+        </initiator>
+        <auth username='myname'>
+          <secret type='iscsi' usage='mycluster_myname'/>
+        </auth>
+      </source>
+      <target dev='sdc' bus='scsi'/>
+    </disk>
     <controller type='usb' index='0'/>
     <controller type='pci' index='0' model='pci-root'/>
     <controller type='scsi' index='0' model='virtio-scsi'/>