diff --git a/src/qemu/qemu_fd.c b/src/qemu/qemu_fd.c
index ebeeb65505..f5eedb88ec 100644
--- a/src/qemu/qemu_fd.c
+++ b/src/qemu/qemu_fd.c
@@ -96,6 +96,47 @@ qemuFDPassNew(const char *prefix,
 }
 
 
+/**
+ * qemuFDPassNewPassed:
+ * @fdSetID: ID of an FDset which was allready passed to qemu
+ *
+ * Create qemuFDPass pointing to an already passed FD. Useful to usw with
+ * qemuFDPassTransferMonitorRollback, when restoring after restart.
+ */
+qemuFDPass *
+qemuFDPassNewPassed(unsigned int fdSetID)
+{
+    qemuFDPass *fdpass = g_new0(qemuFDPass, 1);
+
+    fdpass->fdSetID = fdSetID;
+    fdpass->passed = true;
+
+    return fdpass;
+}
+
+
+/**
+ * qemuFDPassIsPassed:
+ * @fdpass: The fd passing helper struct
+ * @id: when non-NULL filled with the fdset ID
+ *
+ * Returns true if @fdpass was passed to qemu. In such case @id is also filled
+ * with the ID of the fdset if non-NULL.
+ */
+bool
+qemuFDPassIsPassed(qemuFDPass *fdpass,
+                   unsigned *id)
+{
+    if (!fdpass || !fdpass->passed)
+        return false;
+
+    if (id)
+        *id = fdpass->fdSetID;
+
+    return true;
+}
+
+
 /**
  * qemuFDPassAddFD:
  * @fdpass: The fd passing helper struct
diff --git a/src/qemu/qemu_fd.h b/src/qemu/qemu_fd.h
index 032b9442ee..cd0ff2c690 100644
--- a/src/qemu/qemu_fd.h
+++ b/src/qemu/qemu_fd.h
@@ -31,6 +31,13 @@ qemuFDPass *
 qemuFDPassNew(const char *prefix,
               void *dompriv);
 
+qemuFDPass *
+qemuFDPassNewPassed(unsigned int fdSetID);
+
+bool
+qemuFDPassIsPassed(qemuFDPass *fdpass,
+                   unsigned *id);
+
 void
 qemuFDPassAddFD(qemuFDPass *fdpass,
                 int *fd,