[libvirt] [RFC PATCH 02/30] qemu: domain: Format storage source node names into private data

[Peter Krempa]

Save and restore node names if we know them in the status XML so that we
don't need to recalculate them or don't lose them in some cases.

Signed-off-by: Peter Krempa <pkrempa at redhat.com>
---
 src/qemu/qemu_domain.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index e2a8450e2e..224b3b0478 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -1934,6 +1934,9 @@ static int
 qemuStorageSourcePrivateDataParse(xmlXPathContextPtr ctxt,
                                   virStorageSourcePtr src)
 {
+    src->nodestorage = virXPathString("string(./nodename/@storage)", ctxt);
+    src->nodeformat = virXPathString("string(./nodename/@format)", ctxt);
+
     if (virStorageSourcePrivateDataParseRelPath(ctxt, src) < 0)
         return -1;

@@ -1945,6 +1948,15 @@ static int
 qemuStorageSourcePrivateDataFormat(virStorageSourcePtr src,
                                    virBufferPtr buf)
 {
+    if (src->nodestorage || src->nodeformat) {
+        virBufferAddLit(buf, "<nodename");
+        if (src->nodestorage)
+            virBufferAsprintf(buf, " storage='%s'", src->nodestorage);
+        if (src->nodeformat)
+            virBufferAsprintf(buf, " format='%s'", src->nodeformat);
+        virBufferAddLit(buf, "/>\n");
+    }
+
     if (virStorageSourcePrivateDataFormatRelPath(src, buf) < 0)
         return -1;

-- 
2.14.3