qemu: monitor: Add transaction generators for snapshot APIs

Unify with other code that generates parameters for the 'transaction'
command.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>

src/qemu/qemu_monitor.c

@@ -4539,3 +4539,24 @@ qemuMonitorTransactionBitmapMerge(virJSONValuePtr actions,
 {
     return qemuMonitorJSONTransactionBitmapMerge(actions, node, target, sources);
 }
+
+
+int
+qemuMonitorTransactionSnapshotLegacy(virJSONValuePtr actions,
+                                     const char *device,
+                                     const char *path,
+                                     const char *format,
+                                     bool existing)
+{
+    return qemuMonitorJSONTransactionSnapshotLegacy(actions, device, path,
+                                                    format, existing);
+}
+
+
+int
+qemuMonitorTransactionSnapshotBlockdev(virJSONValuePtr actions,
+                                       const char *node,
+                                       const char *overlay)
+{
+    return qemuMonitorJSONTransactionSnapshotBlockdev(actions, node, overlay);
+}

src/qemu/qemu_monitor.h

@@ -1361,3 +1361,14 @@ qemuMonitorTransactionBitmapMerge(virJSONValuePtr actions,
                                   const char *node,
                                   const char *target,
                                   virJSONValuePtr *sources);
+
+int
+qemuMonitorTransactionSnapshotLegacy(virJSONValuePtr actions,
+                                     const char *device,
+                                     const char *path,
+                                     const char *format,
+                                     bool existing);
+int
+qemuMonitorTransactionSnapshotBlockdev(virJSONValuePtr actions,
+                                       const char *node,
+                                       const char *overlay);

src/qemu/qemu_monitor_json.c

@@ -9100,6 +9100,41 @@ qemuMonitorJSONTransactionBitmapMerge(virJSONValuePtr actions,
 }
 
 
+int
+qemuMonitorJSONTransactionSnapshotLegacy(virJSONValuePtr actions,
+                                         const char *device,
+                                         const char *path,
+                                         const char *format,
+                                         bool existing)
+{
+    const char *mode = NULL;
+
+    if (existing)
+        mode = "existing";
+
+    return qemuMonitorJSONTransactionAdd(actions,
+                                         "blockdev-snapshot-sync",
+                                         "s:device", device,
+                                         "s:snapshot-file", path,
+                                         "s:format", format,
+                                         "S:mode", mode,
+                                         NULL);
+}
+
+
+int
+qemuMonitorJSONTransactionSnapshotBlockdev(virJSONValuePtr actions,
+                                           const char *node,
+                                           const char *overlay)
+{
+    return qemuMonitorJSONTransactionAdd(actions,
+                                         "blockdev-snapshot",
+                                         "s:node", node,
+                                         "s:overlay", overlay,
+                                         NULL);
+}
+
+
 static qemuMonitorJobInfoPtr
 qemuMonitorJSONGetJobInfoOne(virJSONValuePtr data)
 {

src/qemu/qemu_monitor_json.h

@@ -656,3 +656,14 @@ qemuMonitorJSONTransactionBitmapMerge(virJSONValuePtr actions,
                                       const char *node,
                                       const char *target,
                                       virJSONValuePtr *sources);
+
+int
+qemuMonitorJSONTransactionSnapshotLegacy(virJSONValuePtr actions,
+                                         const char *device,
+                                         const char *path,
+                                         const char *format,
+                                         bool existing);
+int
+qemuMonitorJSONTransactionSnapshotBlockdev(virJSONValuePtr actions,
+                                           const char *node,
+                                           const char *overlay);