www.pudn.com > FsDriver.rar > QUERYINFORMATION.cpp

/******************************************************************** 
	created:	2003/08/10 
	created:	10:8:2003   9:48 
	filename: 	g:\temp\FsTPM\FsTPM\FsTPM\QUERYINFORMATION.cpp 
	file path:	g:\temp\FsTPM\FsTPM\FsTPM 
	file base:	QUERYINFORMATION 
	file ext:	cpp 
	author:		Supermi 
	 
	purpose:	 
*********************************************************************/ 
#include "FsTPM.h" 
 
NTSTATUS  
FsTPMQueryInformationRoutine(  
					PDEVICE_OBJECT pHookDevice,  
					IN PIRP pIrp  
					) 
{ 
	//  
	// 获得当前堆栈，以及下一个处理IRP的堆栈 
	// 
	PIO_STACK_LOCATION  pCurrentIrpStack = IoGetCurrentIrpStackLocation(pIrp); 
	PIO_STACK_LOCATION  pNextIrpStack    = IoGetNextIrpStackLocation(pIrp); 
	// 
	// 指向我定义的扩展结构，该结构中包括了我所需要的关于下层文件系统的信息 
	// 
	PHOOK_EXTENSION     pHookExt=(PHOOK_EXTENSION)pHookDevice->DeviceExtension; 
 
	PFILE_OBJECT        pFileObject=pCurrentIrpStack->FileObject; 
 
	PDEVICE_OBJECT		pNextLowerDevice=pHookExt->Vcb.NextLowerDevice; 
 
 
	if (pHookExt->Type==GUIINTERFACE) 
	{ 
		pIrp->IoStatus.Information = 0; 
		pIrp->IoStatus.Status = STATUS_SUCCESS; 
 
		IoCompleteRequest( pIrp, IO_NO_INCREMENT ); 
		return STATUS_SUCCESS; 
	} 
 
 
	WCHAR   USName[256]; 
 
	UNICODE_STRING UniSource; 
 
	RtlInitUnicodeString(&UniSource,USName); 
	 
	UniSource.MaximumLength=512; 
 
	NTSTATUS ntStatus=GetFileFullNameByQuery(&UniSource,pHookExt,pFileObject); 
	if (!NT_SUCCESS(ntStatus)) 
	{ 
		FsTPM_DbgPrint(("Get file name by Query Failed In IRP_MJ_QUERY_INFORMATION: ")); 
		ErrorString(ntStatus); 
		return ntStatus; 
	} 
	UpperWordW(UniSource.Buffer); 
	 
	FsTPM_DbgPrint(("IRP_QUERYINFO: %S\n",UniSource.Buffer)); 
 
	IoSkipCurrentIrpStackLocation(pIrp); 
 
	ntStatus=IoCallDriver( pNextLowerDevice, pIrp ); 
 
	return ntStatus; 
 
}