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diff --git a/qemu/qga/vss-win32/requester.h b/qemu/qga/vss-win32/requester.h
new file mode 100644
index 000000000..374f9b8d1
--- /dev/null
+++ b/qemu/qga/vss-win32/requester.h
@@ -0,0 +1,43 @@
+/*
+ * QEMU Guest Agent VSS requester declarations
+ *
+ * Copyright Hitachi Data Systems Corp. 2013
+ *
+ * Authors:
+ *  Tomoki Sekiyama   <tomoki.sekiyama@hds.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef VSS_WIN32_REQUESTER_H
+#define VSS_WIN32_REQUESTER_H
+
+#include <basetyps.h>           /* STDAPI */
+#include "qemu/compiler.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Callback to set Error; used to avoid linking glib to the DLL */
+typedef void (*ErrorSetFunc)(void **errp, int win32_err, int err_class,
+                             const char *fmt, ...) GCC_FMT_ATTR(4, 5);
+typedef struct ErrorSet {
+    ErrorSetFunc error_set;
+    void **errp;
+    int err_class;
+} ErrorSet;
+
+STDAPI requester_init(void);
+STDAPI requester_deinit(void);
+
+typedef void (*QGAVSSRequesterFunc)(int *, ErrorSet *);
+void requester_freeze(int *num_vols, ErrorSet *errset);
+void requester_thaw(int *num_vols, ErrorSet *errset);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif