www.pudn.com > defrag.rar > defrag.h

//==================================================================== 
// 
// Defrag.h 
// 
// Copyright (C) 1997 Mark Russinovich 
// 
// Header file for defragmentation demonstration program. This file 
// includes definitions for defragmentation File System Control  
// commands, as well as the undocumented NtFsControl call. 
// 
//==================================================================== 
 
//-------------------------------------------------------------------- 
//                     D E F I N E S  
//-------------------------------------------------------------------- 
 
// 
// File System Control commands related to defragging 
// 
 
#define FSCTL_READ_MFT_RECORD           0x90068 
#define FSCTL_GET_VOLUME_BITMAP         0x9006F 
#define FSCTL_GET_RETRIEVAL_POINTERS    0x90073 
#define FSCTL_MOVE_FILE                 0x90074 
 
// 
// return code type 
// 
 
typedef UINT NTSTATUS; 
 
// 
// Error codes returned by NtFsControlFile (see NTSTATUS.H) 
// 
 
#define STATUS_SUCCESS                   ((NTSTATUS)0x00000000L) 
#define STATUS_BUFFER_OVERFLOW           ((NTSTATUS)0x80000005L) 
#define STATUS_INVALID_PARAMETER         ((NTSTATUS)0xC000000DL) 
#define STATUS_BUFFER_TOO_SMALL          ((NTSTATUS)0xC0000023L) 
#define STATUS_ALREADY_COMMITTED         ((NTSTATUS)0xC0000021L) 
#define STATUS_INVALID_DEVICE_REQUEST    ((NTSTATUS)0xC0000010L) 
 
//-------------------------------------------------------------------- 
//       F S C T L  S P E C I F I C   T Y P E D E F S   
//-------------------------------------------------------------------- 
 
// 
// This is the definition for a VCN/LCN (virtual cluster/logical cluster) 
// mapping pair that is returned in the buffer passed to  
// FSCTL_GET_RETRIEVAL_POINTERS 
// 
 
typedef struct { 
      ULONGLONG               Vcn; 
      ULONGLONG               Lcn; 
} MAPPING_PAIR, *PMAPPING_PAIR; 
 
// 
// This is the definition for the buffer that FSCTL_GET_RETRIEVAL_POINTERS 
// returns. It consists of a header followed by mapping pairs 
// 
 
typedef struct { 
      ULONG                  NumberOfPairs; 
      ULONGLONG               StartVcn; 
      MAPPING_PAIR      Pair[1]; 
} GET_RETRIEVAL_DESCRIPTOR, *PGET_RETRIEVAL_DESCRIPTOR; 
 
// 
// This is the definition of the buffer that FSCTL_GET_VOLUME_BITMAP 
// returns. It consists of a header followed by the actual bitmap data 
// 
 
typedef struct { 
      ULONGLONG               StartLcn; 
      ULONGLONG               ClustersToEndOfVol; 
      BYTE                     Map[1]; 
} BITMAP_DESCRIPTOR, *PBITMAP_DESCRIPTOR;  
 
// 
// This is the definition for the data structure that is passed in to 
// FSCTL_MOVE_FILE 
// 
 
typedef struct { 
     HANDLE            FileHandle;  
     ULONG             Reserved;    
     LARGE_INTEGER     StartVcn;  
     LARGE_INTEGER     TargetLcn; 
     ULONG             NumVcns;  
     ULONG             Reserved1;      
} MOVEFILE_DESCRIPTOR, *PMOVEFILE_DESCRIPTOR; 
 
//-------------------------------------------------------------------- 
//     N T F S C O N T R O L F I L E   D E F I N I T I O N S 
//-------------------------------------------------------------------- 
 
// 
// Prototype for NtFsControlFile and data structures 
// used in its definition 
// 
 
// 
// Io Status block (see NTDDK.H) 
// 
 
typedef struct _IO_STATUS_BLOCK { 
    NTSTATUS Status; 
    ULONG Information; 
} IO_STATUS_BLOCK, *PIO_STATUS_BLOCK; 
 
// 
// Apc Routine (see NTDDK.H) 
// 
 
typedef VOID (*PIO_APC_ROUTINE) ( 
                      PVOID ApcContext, 
                      PIO_STATUS_BLOCK IoStatusBlock, 
                      ULONG Reserved 
                 ); 
 
// 
// The undocumented NtFsControlFile 
// 
// This function is used to send File System Control (FSCTL) 
// commands into file system drivers. Its definition is  
// in ntdll.dll (ntdll.lib), a file shipped with the NTDDK. 
// 
 
NTSTATUS (__stdcall *NtFsControlFile)(  
                            HANDLE FileHandle, 
                            HANDLE Event,                       // optional 
                            PIO_APC_ROUTINE ApcRoutine,          // optional 
                            PVOID ApcContext,                 // optional 
                            PIO_STATUS_BLOCK IoStatusBlock,     
                            ULONG FsControlCode, 
                            PVOID InputBuffer,                 // optional 
                            ULONG InputBufferLength, 
                            PVOID OutputBuffer,                     // optional 
                            ULONG OutputBufferLength 
                 );