reactos/include/reactos/drivers/ntddrdsk.h

   1 /*
   2  * PROJECT:         ReactOS Kernel
   3  * LICENSE:         BSD - See COPYING.ARM in the top level directory
   4  * FILE:            include/reactos/drivers/ntddrdsk.h
   5  * PURPOSE:         Constants and types for accessing the RAM disk device
   6  * PROGRAMMERS:     ReactOS Portable Systems Group
   7  */
   8 #ifndef _NTDDRDSK_H_
   9 #define _NTDDRDSK_H_
  10
  11 #if _MSC_VER > 1000
  12 #pragma once
  13 #endif
  14
  15 #ifdef __cplusplus1
  16 extern "C" {
  17 #endif
  18
  19 //
  20 // This guid identifies a RAM disk volume
  21 //
  22 DEFINE_GUID(RAMDISK_BOOTDISK_GUID, 0xd9b257fc, 0x684e, 0x4dcb, 0x79, 0xab, 0xf6, 0xa2, 0xcf, 0x03, 0x50, 0xb7);
  23
  24 //
  25 // This guid identifies a RAM disk bus
  26 //
  27 DEFINE_GUID(GUID_BUS_TYPE_RAMDISK, 0x9d6d66a6, 0x0b0c, 0x4563, 0x90, 0x77, 0xa0, 0xe9, 0xa7, 0x95, 0x5a, 0xe4);
  28
  29 //
  30 // Device Name - this string is the name of the device.  It is the name
  31 // that should be passed to NtOpenFile when accessing the device.
  32 //
  33 // Note:  For devices that support multiple units, it should be suffixed
  34 //        with the Ascii representation of the unit number.
  35 //
  36 #define DD_RAMDISK_DEVICE_NAME            "\\Device\\Ramdisk"
  37
  38 //
  39 // IoControlCode values for ramdisk devices.
  40 //
  41 #define IOCTL_RAMDISK_BASE                FILE_DEVICE_VIRTUAL_DISK
  42 #define FSCTL_CREATE_RAM_DISK             CTL_CODE(FILE_DEVICE_VIRTUAL_DISK, 0x0000, METHOD_BUFFERED, FILE_ANY_ACCESS)
  43
  44 //
  45 // Disk Types
  46 //
  47 #define RAMDISK_REGISTRY_DISK             1 // Loaded from the registry
  48 #define RAMDISK_MEMORY_MAPPED_DISK        2 // Loaded from the registry
  49 #define RAMDISK_BOOT_DISK                 3 // Used as a boot device
  50 #define RAMDISK_WIM_DISK                  4 // Used as an installation device
  51
  52 //
  53 // Options when creating a ramdisk
  54 //
  55 typedef struct _RAMDISK_CREATE_OPTIONS
  56 {
  57     ULONG Readonly:1;
  58     ULONG Fixed:1;
  59     ULONG NoDriveLetter:1;
  60     ULONG NoDosDevice:1;
  61     ULONG Hidden:1;
  62     ULONG ExportAsCd:1;
  63 } RAMDISK_CREATE_OPTIONS;
  64
  65 //
  66 // This structure is passed in for a FSCTL_CREATE_RAM_DISK call
  67 //
  68 typedef struct _RAMDISK_CREATE_INPUT
  69 {
  70     ULONG Version;
  71     GUID DiskGuid;
  72     ULONG DiskType;
  73     RAMDISK_CREATE_OPTIONS Options;
  74     LARGE_INTEGER DiskLength;
  75     LONG DiskOffset;
  76     union
  77     {
  78         struct
  79         {
  80             ULONG ViewCount;
  81             SIZE_T ViewLength;
  82             WCHAR FileName[ANYSIZE_ARRAY];
  83         };
  84         struct
  85         {
  86             ULONG_PTR BasePage;
  87             WCHAR DriveLetter;
  88         };
  89         PVOID BaseAddress;
  90     };
  91 } RAMDISK_CREATE_INPUT, *PRAMDISK_CREATE_INPUT;
  92
  93 #ifdef __cplusplus
  94 }
  95 #endif
  96
  97 #endif // _NTDDRDSK_H_