5 files changed, 16 insertions, 15 deletions
diff --git a/qemu/qga/vss-win32/install.cpp b/qemu/qga/vss-win32/install.cpp
index b0e4426c7..cd9cdb4a2 100644
--- a/qemu/qga/vss-win32/install.cpp
+++ b/qemu/qga/vss-win32/install.cpp
@@ -10,8 +10,7 @@
  * See the COPYING file in the top-level directory.
  */
 
-#include <stdio.h>
-#include <string.h>
+#include "qemu/osdep.h"
 
 #include "vss-common.h"
 #include "inc/win2003/vscoordint.h"
diff --git a/qemu/qga/vss-win32/provider.cpp b/qemu/qga/vss-win32/provider.cpp
index d5129f8f6..d977393e3 100644
--- a/qemu/qga/vss-win32/provider.cpp
+++ b/qemu/qga/vss-win32/provider.cpp
@@ -10,7 +10,7 @@
  * See the COPYING file in the top-level directory.
  */
 
-#include <stdio.h>
+#include "qemu/osdep.h"
 #include "vss-common.h"
 #include "inc/win2003/vscoordint.h"
 #include "inc/win2003/vsprov.h"
diff --git a/qemu/qga/vss-win32/requester.cpp b/qemu/qga/vss-win32/requester.cpp
index 922e74ddf..889052ded 100644
--- a/qemu/qga/vss-win32/requester.cpp
+++ b/qemu/qga/vss-win32/requester.cpp
@@ -10,10 +10,9 @@
  * See the COPYING file in the top-level directory.
  */
 
-#include <stdio.h>
+#include "qemu/osdep.h"
 #include "vss-common.h"
 #include "requester.h"
-#include "assert.h"
 #include "inc/win2003/vswriter.h"
 #include "inc/win2003/vsbackup.h"
 
@@ -23,10 +22,12 @@
 /* Call QueryStatus every 10 ms while waiting for frozen event */
 #define VSS_TIMEOUT_EVENT_MSEC 10
 
-#define err_set(e, err, fmt, ...) \
-    ((e)->error_set((e)->errp, err, (e)->err_class, fmt, ## __VA_ARGS__))
+#define err_set(e, err, fmt, ...)                                           \
+    ((e)->error_setg_win32_wrapper((e)->errp, __FILE__, __LINE__, __func__, \
+                                   err, fmt, ## __VA_ARGS__))
+/* Bad idea, works only when (e)->errp != NULL: */
 #define err_is_set(e) ((e)->errp && *(e)->errp)
-
+/* To lift this restriction, error_propagate(), like we do in QEMU code */
 
 /* Handle to VSSAPI.DLL */
 static HMODULE hLib;
diff --git a/qemu/qga/vss-win32/requester.h b/qemu/qga/vss-win32/requester.h
index 374f9b8d1..2a39d734a 100644
--- a/qemu/qga/vss-win32/requester.h
+++ b/qemu/qga/vss-win32/requester.h
@@ -14,19 +14,21 @@
 #define VSS_WIN32_REQUESTER_H
 
 #include <basetyps.h>           /* STDAPI */
-#include "qemu/compiler.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+struct Error;
+
 /* 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 void (*ErrorSetFunc)(struct Error **errp,
+                             const char *src, int line, const char *func,
+                             int win32_err, const char *fmt, ...)
+    GCC_FMT_ATTR(6, 7);
 typedef struct ErrorSet {
-    ErrorSetFunc error_set;
-    void **errp;
-    int err_class;
+    ErrorSetFunc error_setg_win32_wrapper;
+    struct Error **errp;        /* restriction: must not be null */
 } ErrorSet;
 
 STDAPI requester_init(void);
diff --git a/qemu/qga/vss-win32/vss-common.h b/qemu/qga/vss-win32/vss-common.h
index ce14e1429..91dae0c38 100644
--- a/qemu/qga/vss-win32/vss-common.h
+++ b/qemu/qga/vss-win32/vss-common.h
@@ -14,7 +14,6 @@
 #define VSS_WIN32_H
 
 #define __MIDL_user_allocate_free_DEFINED__
-#include "config-host.h"
 #include <windows.h>
 #include <shlwapi.h>