qemu: domain: Format storage source node names into private data

Save and restore node names if we know them or when we will be
generating them in the status XML.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

src/qemu/qemu_domain.c

@@ -1937,6 +1937,9 @@ static int
 qemuStorageSourcePrivateDataParse(xmlXPathContextPtr ctxt,
                                   virStorageSourcePtr src)
 {
+    src->nodestorage = virXPathString("string(./nodenames/nodename[@type='storage']/@name)", ctxt);
+    src->nodeformat = virXPathString("string(./nodenames/nodename[@type='format']/@name)", ctxt);
+
     if (virStorageSourcePrivateDataParseRelPath(ctxt, src) < 0)
         return -1;
 
@@ -1948,6 +1951,15 @@ static int
 qemuStorageSourcePrivateDataFormat(virStorageSourcePtr src,
                                    virBufferPtr buf)
 {
+    if (src->nodestorage || src->nodeformat) {
+        virBufferAddLit(buf, "<nodenames>\n");
+        virBufferAdjustIndent(buf, 2);
+        virBufferEscapeString(buf, "<nodename type='storage' name='%s'/>\n", src->nodestorage);
+        virBufferEscapeString(buf, "<nodename type='format' name='%s'/>\n", src->nodeformat);
+        virBufferAdjustIndent(buf, -2);
+        virBufferAddLit(buf, "</nodenames>\n");
+    }
+
     if (virStorageSourcePrivateDataFormatRelPath(src, buf) < 0)
         return -1;
 

tests/qemustatusxml2xmldata/modern-in.xml

@@ -309,6 +309,10 @@
           <format type='qcow2'/>
           <source file='/var/lib/libvirt/images/base.qcow2'>
             <privateData>
+              <nodenames>
+                <nodename type='storage' name='test-storage'/>
+                <nodename type='format' name='test-format'/>
+              </nodenames>
               <relPath>base.qcow2</relPath>
             </privateData>
           </source>