- Define NT RAM Disk device interface (100% compatible with Microsoft ramdisk.sys)

svn path=/trunk/; revision=34201

reactos/include/reactos/drivers/ntddrdsk.h

@@ -0,0 +1,84 @@
+/*
+ * PROJECT:         ReactOS Kernel
+ * LICENSE:         BSD - See COPYING.ARM in the top level directory
+ * FILE:            include/reactos/drivers/ntddrdsk.h
+ * PURPOSE:         Constants and types for accessing the RAM disk device
+ * PROGRAMMERS:     ReactOS Portable Systems Group
+ */
+#ifndef _NTDDRDSK_H_
+#define _NTDDRDSK_H_
+
+#if _MSC_VER > 1000
+#pragma once
+#endif
+
+#ifdef __cplusplus1
+extern "C" {
+#endif
+
+//
+// This guid identifies a RAM disk volume
+//
+DEFINE_GUID(RAMDISK_BOOTDISK_GUID, 0xd9b257fc, 0x684e, 0x4dcb, 0x79, 0xab, 0xf6, 0xa2, 0xcf, 0x03, 0x50, 0xb7);
+    
+//
+// Device Name - this string is the name of the device.  It is the name
+// that should be passed to NtOpenFile when accessing the device.
+//
+// Note:  For devices that support multiple units, it should be suffixed
+//        with the Ascii representation of the unit number.
+//
+#define DD_RAMDISK_DEVICE_NAME            "\\Device\\Ramdisk"
+
+//
+// IoControlCode values for ramdisk devices.
+//
+#define IOCTL_RAMDISK_BASE                FILE_DEVICE_VIRTUAL_DISK
+#define FSCTL_CREATE_RAM_DISK             CTL_CODE(FILE_DEVICE_VIRTUAL_DISK, 0x0000, METHOD_BUFFERED, FILE_ANY_ACCESS)
+
+//
+// Options when creating a ramdisk
+//
+typedef struct _RAMDISK_CREATE_OPTIONS
+{
+    ULONG Readonly:1;
+    ULONG Fixed:1;
+    ULONG NoDriveLetter:1;
+    ULONG NoDosDevice:1;
+    ULONG Hidden:1;
+    ULONG ExportAsCd:1;
+} RAMDISK_CREATE_OPTIONS;
+
+//
+// This structure is passed in for a FSCTL_CREATE_RAM_DISK call
+//
+typedef struct _RAMDISK_CREATE_INPUT
+{
+    ULONG Version;
+    GUID DiskGuid;
+    ULONG DiskType;
+    RAMDISK_CREATE_OPTIONS Options;
+    ULONGLONG DiskLength;
+    ULONG DiskOffset;
+    union
+    {
+        struct
+        {
+            ULONG ViewCount;
+            ULONG ViewLength;
+            WCHAR FileName[ANYSIZE_ARRAY];
+        };
+        struct
+        {
+            ULONG BasePage;
+            WCHAR DriveLetter;
+        };
+        PVOID BaseAddress;
+    };
+} RAMDISK_CREATE_INPUT, *PRAMDISK_CREATE_INPUT;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _NTDDRDSK_H_