qemuBlockReopenAccess: prepare for removal of 'raw' format layer

Make the helper reopening a blockdev for access pick the correct layer
to reopen based on what is currently in use.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c
index 2555db1778247ddab7bfd672070797d4728a0de2..8b73d93962b131d7db7117260f7d473abf459ed5 100644 (file)
--- a/src/qemu/qemu_block.c
+++ b/src/qemu/qemu_block.c
@@ -3202,8 +3202,19 @@ qemuBlockReopenAccess(virDomainObj *vm,
     src->readonly = readonly;
     /* from now on all error paths must use 'goto cleanup' */
 
-    if (!(srcprops = qemuBlockStorageSourceGetFormatProps(src, src->backingStore)))
-        return -1;
+    /* based on which is the current 'effecitve' layer we must reopen the
+     * appropriate blockdev */
+    if (qemuBlockStorageSourceGetFormatNodename(src)) {
+        if (!(srcprops = qemuBlockStorageSourceGetFormatProps(src, src->backingStore)))
+            return -1;
+    } else if (qemuBlockStorageSourceGetSliceNodename(src)) {
+        if (!(srcprops = qemuBlockStorageSourceGetBlockdevStorageSliceProps(src, true)))
+            return -1;
+    } else {
+        if (!(srcprops = qemuBlockStorageSourceGetBackendProps(src,
+                                                               QEMU_BLOCK_STORAGE_SOURCE_BACKEND_PROPS_EFFECTIVE_NODE)))
+            return -1;
+    }
 
     if (virJSONValueArrayAppend(reopenoptions, &srcprops) < 0)
         return -1;