mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
314 lines
12 KiB
314 lines
12 KiB
/**************************************************************************************************
|
|
|
|
FILENAME: MFTDefrag.cpp
|
|
|
|
COPYRIGHT© 2001 Microsoft Corporation and Executive Software International, Inc.
|
|
|
|
DESCRIPTION:
|
|
MFT defragment for NTFS.
|
|
|
|
**************************************************************************************************/
|
|
|
|
#include "stdafx.h"
|
|
|
|
extern "C"{
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
}
|
|
|
|
#include "Windows.h"
|
|
#include <winioctl.h>
|
|
#include <math.h>
|
|
#include <fcntl.h>
|
|
|
|
|
|
extern "C" {
|
|
#include "SysStruc.h"
|
|
}
|
|
|
|
#include "MFTDefrag.h"
|
|
#include "DfrgCmn.h"
|
|
#include "GetReg.h"
|
|
|
|
#include "Devio.h"
|
|
|
|
#include "movefile.h"
|
|
|
|
#include "Alloc.h"
|
|
#include "defragcommon.h"
|
|
|
|
#define THIS_MODULE 'M'
|
|
#include "logfile.h"
|
|
|
|
|
|
|
|
|
|
|
|
#if OPTLONGLONGMATH
|
|
#define DIVIDELONGLONGBY32(num) Int64ShraMod32((num), 5)
|
|
#define MODULUSLONGLONGBY32(num) ((num) & 0x1F)
|
|
#else
|
|
#define DIVIDELONGLONGBY32(num) ((num) / 32)
|
|
#define MODULUSLONGLONGBY32(num) ((num) % 32)
|
|
#endif
|
|
|
|
|
|
/*****************************************************************************************************************
|
|
|
|
COPYRIGHT© 2001 Microsoft Corporation and Executive Software International, Inc.
|
|
|
|
ROUTINE DESCRIPTION:
|
|
The main process of the MFT Defrag functionality
|
|
MFT Defrag defragments the MFT file. If the MFT (minus the first extent that includes the
|
|
first 16 records) is in two fragments, find a empty space to move it to, and move it, else
|
|
dont move it if a space big enough is not found
|
|
|
|
INPUT:
|
|
HANDLE hVolumeHandle Handle to the Volume
|
|
LONGLONG BitmapSize The size of the bitmap, since its already known
|
|
LONGLONG BytesPerSector The number of Bytes per Sector
|
|
LONGLONG TotalClusters Total number of clusters on the drive
|
|
ULONGLONG MftZoneStart The Cluster Number of the start of the MFT Zone
|
|
ULONGLONG MftZoneEnd The Cluster Number of the end of the MFT Zone
|
|
TCHAR tDrive The current drive letter
|
|
RETURN:
|
|
return TRUE if I was able to defragment the MFT, else I return FALSE if an error occured.
|
|
*/
|
|
BOOL MFTDefrag(
|
|
IN HANDLE hVolumeHandle,
|
|
IN LONGLONG BitmapSize,
|
|
IN LONGLONG BytesPerSector,
|
|
IN LONGLONG TotalClusters,
|
|
IN ULONGLONG MftZoneStart,
|
|
IN ULONGLONG MftZoneEnd,
|
|
IN TCHAR tDrive,
|
|
IN LONGLONG ClustersPerFRS
|
|
)
|
|
{
|
|
|
|
HANDLE hMFTHandle = NULL; //Handle to the MFT file.
|
|
|
|
LONGLONG lFirstAvailableFreeSpace = 0; //the first available free space on the disk dig enough to move to
|
|
ULONGLONG ulMFTsize = 0; //size in clusters of how big the mft file is
|
|
LONGLONG lMFTFragments = 0; //the number of fragments in the MFT after excluding the first 16 records
|
|
LONGLONG lMFTStartingVcn = 0; //the VCN of the MFT from record 17.
|
|
BOOL bReturnValue = TRUE; //value to return
|
|
|
|
//make sure the drive letter is upper case
|
|
tDrive = towupper(tDrive);
|
|
|
|
Trace(log, "Start: MFTDefrag");
|
|
|
|
//get the handle to the MFT
|
|
TCHAR tMFTPath[100]; //build the path to the MFT
|
|
_stprintf(tMFTPath,TEXT("\\\\.\\%c:\\$MFT"),tDrive);
|
|
|
|
hMFTHandle = CreateFile(tMFTPath,
|
|
0,
|
|
FILE_SHARE_READ|FILE_SHARE_WRITE,
|
|
NULL,
|
|
OPEN_EXISTING,
|
|
FILE_FLAG_NO_BUFFERING,
|
|
0);
|
|
|
|
//check to make sure we got a valid handle (valid handle will be not NULL)
|
|
if((hMFTHandle) && (hMFTHandle != INVALID_HANDLE_VALUE))
|
|
{
|
|
//get the size of the MFT minus the first extent in clusters.
|
|
ulMFTsize = GetMFTSize(hMFTHandle, &lMFTFragments, &lMFTStartingVcn);
|
|
if(lMFTStartingVcn > (ClustersPerFRS * 16)) //check to see if the first extent is beyond the first 16 record
|
|
{
|
|
if(lMFTFragments > 1) //mft fragmented go ahead and try and move else just leave
|
|
{
|
|
//find the first available chunk of free space that is available
|
|
lFirstAvailableFreeSpace = FindFreeSpaceChunk(BitmapSize, BytesPerSector,
|
|
TotalClusters, ulMFTsize, TRUE, MftZoneStart, MftZoneEnd, hVolumeHandle);
|
|
if(lFirstAvailableFreeSpace > 0) //if the first available space is zero, nothing was found dont move
|
|
{
|
|
//adjust the MFT size down by the size of the first extent, since we do not move
|
|
//the first extent
|
|
ulMFTsize = ulMFTsize - (ULONGLONG)lMFTStartingVcn;
|
|
//move the MFT to new location
|
|
if(!MoveFileLocation(hMFTHandle, lFirstAvailableFreeSpace, ulMFTsize, lMFTStartingVcn, hVolumeHandle))
|
|
{
|
|
//the move failed, so we return FALSE;
|
|
Trace(log, "MFTDefrag: MoveFileLocation failed");
|
|
bReturnValue = FALSE;
|
|
}
|
|
}
|
|
}
|
|
} else
|
|
{
|
|
//the end of the first extent is not past record 16, so return FALSE;
|
|
Trace(log, "MFTDefrag: End of first extent is not past record 16");
|
|
bReturnValue = FALSE;
|
|
}
|
|
|
|
CloseHandle(hMFTHandle);
|
|
} else
|
|
{
|
|
Trace(log, "MFTDefrag: Could not open %ws", tMFTPath);
|
|
bReturnValue = FALSE; //could not open the MFT
|
|
}
|
|
|
|
Trace(log, "End: MFTDefrag (%s)", bReturnValue ? "succeeded" : "failed");
|
|
return bReturnValue;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*****************************************************************************************************************
|
|
|
|
COPYRIGHT© 2001 Microsoft Corporation and Executive Software International, Inc.
|
|
|
|
ROUTINE DESCRIPTION:
|
|
Get the size of the MFT in clusters from calling FSCL_GET_RETRIEVAL_POINTERS.
|
|
Also return the number of fragments in the MFT and the starting VCN of the second
|
|
fragment of the MFT.
|
|
|
|
INPUT:
|
|
HANDLE hMFTFile The handle to the MFT File
|
|
RETURN:
|
|
The size of the MFT file in clusters
|
|
the number of fragments in the MFT
|
|
the starting VCN of the MFT after the first extent
|
|
*/
|
|
|
|
ULONGLONG GetMFTSize(
|
|
IN HANDLE hMFTHandle,
|
|
OUT LONGLONG* lMFTFragments,
|
|
OUT LONGLONG* lMFTStartingVcn
|
|
)
|
|
{
|
|
ULONGLONG ulSizeofFileInClusters = 0; //size of the file in clusters
|
|
int i;
|
|
ULONGLONG startVcn = 0; //starting VCN of the file, always 0
|
|
STARTING_VCN_INPUT_BUFFER startingVcn; //starting VCN Buffer
|
|
ULONG BytesReturned = 0; //number of bytes returned by ESDeviceIoControl
|
|
HANDLE hRetrievalPointersBuffer = NULL; //Handle to the Retrieval Pointers Buffer
|
|
PRETRIEVAL_POINTERS_BUFFER pRetrievalPointersBuffer = NULL; //pointer to the Retrieval Pointer
|
|
PLARGE_INTEGER pRetrievalPointers = NULL; //Pointer to retrieval pointers
|
|
ULONG RetrievalPointers = 0x100; //Number of extents for the file, try 256 first
|
|
BOOL bGetRetrievalPointersMore = TRUE; //boolean to test the end of getting retrieval pointers
|
|
BOOL bGetRetrievalPointersSuccess = TRUE; //test if I was able to get retrieval pointers
|
|
ULONG ulGlobalLockCount = 0; //count the number of times I lock memory
|
|
ULONG ii; //index
|
|
|
|
|
|
//initalize the values I give back incase I have an error
|
|
*lMFTFragments = 0;
|
|
*lMFTStartingVcn = 0;
|
|
|
|
if (hMFTHandle == INVALID_HANDLE_VALUE)
|
|
{
|
|
ulSizeofFileInClusters = 0;
|
|
|
|
} else //continue
|
|
{
|
|
//zero the memory of the starting VCN input buffer
|
|
ZeroMemory(&startVcn, sizeof(STARTING_VCN_INPUT_BUFFER));
|
|
|
|
//0.1E00 Read the retrieval pointers into a buffer in memory.
|
|
while(bGetRetrievalPointersMore){
|
|
|
|
//0.0E00 Allocate a RetrievalPointersBuffer.
|
|
if(!AllocateMemory(sizeof(RETRIEVAL_POINTERS_BUFFER) + (RetrievalPointers * 2 * sizeof(LARGE_INTEGER)),
|
|
&hRetrievalPointersBuffer,
|
|
(void**)(PCHAR*)&pRetrievalPointersBuffer))
|
|
{
|
|
ulSizeofFileInClusters = 0;
|
|
bGetRetrievalPointersSuccess = FALSE;
|
|
break; //break out of the while loop
|
|
}
|
|
ulGlobalLockCount++;
|
|
|
|
//call NTControlFile via ESDeviceIoControl to get a buffer with the
|
|
//retrieval pointers on the MFT.
|
|
startingVcn.StartingVcn.QuadPart = 0;
|
|
if(ESDeviceIoControl(hMFTHandle,
|
|
FSCTL_GET_RETRIEVAL_POINTERS,
|
|
&startingVcn,
|
|
sizeof(STARTING_VCN_INPUT_BUFFER),
|
|
pRetrievalPointersBuffer,
|
|
(DWORD)GlobalSize(hRetrievalPointersBuffer),
|
|
&BytesReturned,
|
|
NULL))
|
|
{
|
|
bGetRetrievalPointersMore = FALSE;
|
|
bGetRetrievalPointersSuccess = TRUE;
|
|
} else
|
|
{
|
|
|
|
//This occurs on a zero length file (no clusters allocated).
|
|
if(GetLastError() == ERROR_HANDLE_EOF)
|
|
{
|
|
//file is zero lenght, so return 0
|
|
//free the memory for the retrival pointers
|
|
//the while loop makes sure all occurances are unlocked
|
|
ulSizeofFileInClusters = 0;
|
|
bGetRetrievalPointersSuccess = FALSE;
|
|
break; //break out of the while loop
|
|
|
|
}
|
|
|
|
//0.0E00 Check to see if the error is not because the buffer is too small.
|
|
if(GetLastError() == ERROR_MORE_DATA)
|
|
{
|
|
//0.1E00 Double the buffer size until it's large enough to hold the file's extent list.
|
|
RetrievalPointers *= 2;
|
|
} else
|
|
{
|
|
//some other error, return 0
|
|
//free the memory for the retrival pointers
|
|
//the while loop makes sure all occurances are unlocked
|
|
ulSizeofFileInClusters = 0;
|
|
bGetRetrievalPointersSuccess = FALSE;
|
|
break; //break out of the while loop
|
|
|
|
}
|
|
}
|
|
|
|
}
|
|
if(bGetRetrievalPointersSuccess) //continue processing if we were able to get retrieval pointers
|
|
{
|
|
//get the number of fragments in the MFT
|
|
*lMFTFragments = pRetrievalPointersBuffer->ExtentCount;
|
|
|
|
//get the size of the first extend for the starting VCN
|
|
*lMFTStartingVcn = pRetrievalPointersBuffer->Extents[0].NextVcn.QuadPart - startVcn;
|
|
|
|
//loop through the retrival pointer list and add up the size of the file
|
|
startVcn = pRetrievalPointersBuffer->StartingVcn.QuadPart;
|
|
for (i = 1; i < (ULONGLONG) pRetrievalPointersBuffer->ExtentCount; i++)
|
|
{
|
|
ulSizeofFileInClusters += pRetrievalPointersBuffer->Extents[i].NextVcn.QuadPart - startVcn;
|
|
startVcn = pRetrievalPointersBuffer->Extents[i].NextVcn.QuadPart;
|
|
}
|
|
|
|
}
|
|
|
|
if(hRetrievalPointersBuffer != NULL)
|
|
{
|
|
//free the memory for the retrival pointers
|
|
//the while loop makes sure all occurances are unlocked
|
|
for (ii=0;ii< ulGlobalLockCount;ii++)
|
|
{
|
|
GlobalUnlock(hRetrievalPointersBuffer);
|
|
}
|
|
|
|
GlobalFree(hRetrievalPointersBuffer);
|
|
hRetrievalPointersBuffer = NULL;
|
|
}
|
|
|
|
}
|
|
return ulSizeofFileInClusters;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|