opt/fsext: kernel mode winfsp extension

opt/fsext/inc/winfsp/fsext.h

@@ -0,0 +1,60 @@
+/**
+ * @file winfsp/fsext.h
+ *
+ * @copyright 2015-2019 Bill Zissimopoulos
+ */
+/*
+ * This file is part of WinFsp.
+ *
+ * You can redistribute it and/or modify it under the terms of the GNU
+ * General Public License version 3 as published by the Free Software
+ * Foundation.
+ *
+ * Licensees holding a valid commercial license may use this software
+ * in accordance with the commercial license agreement provided in
+ * conjunction with the software.  The terms and conditions of any such
+ * commercial license agreement shall govern, supersede, and render
+ * ineffective any application of the GPLv3 license to this software,
+ * notwithstanding of any reference thereto in the software or
+ * associated repository.
+ */
+
+#ifndef WINFSP_FSEXT_H_INCLUDED
+#define WINFSP_FSEXT_H_INCLUDED
+
+#if !defined(_KERNEL_MODE)
+#error This file can only be included when compiling for kernel mode.
+#endif
+
+#include <winfsp/fsctl.h>
+
+#if defined(WINFSP_SYS_INTERNAL)
+#define FSP_DDI                         __declspec(dllexport)
+#else
+#define FSP_DDI                         __declspec(dllimport)
+#endif
+#if !defined(FSP_DDI_DEF)
+#define FSP_DDI_DEF(RetType, Name, ...) FSP_DDI RetType NTAPI Name ( __VA_ARGS__ );
+#endif
+
+typedef struct
+{
+    UINT32 Version;
+    /* in */
+    UINT32 DeviceTransactCode;
+    UINT32 DeviceExtensionSize;
+    NTSTATUS (*DeviceInit)(PDEVICE_OBJECT DeviceObject);
+    VOID (*DeviceFini)(PDEVICE_OBJECT DeviceObject);
+    VOID (*DeviceExpirationRoutine)(PDEVICE_OBJECT DeviceObject, UINT64 ExpirationTime);
+    NTSTATUS (*DeviceTransact)(PIRP Irp, PDEVICE_OBJECT DeviceObject);
+    /* out */
+    UINT32 DeviceExtensionOffset;
+} FSP_FSEXT_PROVIDER;
+
+FSP_DDI_DEF(NTSTATUS, FspFsextRegisterProvider, FSP_FSEXT_PROVIDER *Provider)
+
+FSP_DDI_DEF(NTSTATUS, FspPosixMapSidToUid, PSID Sid, PUINT32 PUid)
+FSP_DDI_DEF(NTSTATUS, FspPosixMapWindowsToPosixPathEx, PWSTR WindowsPath, char **PPosixPath,
+    BOOLEAN Translate)
+
+#endif