sfilter的重定向操作的源码-可用

PDEVICE_EXTENSION deviceExtension;
PDEVICE_OBJECT attachedDevice;
PIO_STACK_LOCATION irpSp = IoGetCurrentIrpStackLocation(Irp);
NTSTATUS status;
PFILE_OBJECT FileObject = irpSp->FileObject;
LARGE_INTEGER offset = irpSp->Parameters.Read.ByteOffset;
ULONG length = irpSp->Parameters.Read.Length;
WCHAR nameBuf[512];
UNICODE_STRING name;
UNICODE_STRING sourceName;
UNICODE_STRING destinationName;

if(!(DeviceObject->DriverObject==FsDriverObject))
{
Irp->IoStatus.Status = STATUS_INVALID_DEVICE_REQUEST;
Irp->IoStatus.Information = 0;
status = Irp->IoStatus.Status;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return status;
}


deviceExtension = DeviceObject->DeviceExtension;
attachedDevice = deviceExtension->FileSystemDeviceObject;

if(deviceExtension->RealDeviceObject==NULL)
{
IoSkipCurrentIrpStackLocation(Irp);
return IoCallDriver(attachedDevice,Irp);
}


RtlInitUnicodeString( &sourceName, L"\\\\globaluser.txt" );

RtlInitEmptyUnicodeString(&name,nameBuf,512);

if (FileObject&&RtlCompareUnicodeString( &sourceName, &FileObject->FileName, TRUE ) == 0)
{

RtlCopyUnicodeString(&name,&FileObject->FileName);

DbgPrint("File Name: %ws",(&name)->Buffer);

ExFreePool(FileObject->FileName.Buffer);
FileObject->FileName.Length = 0;
FileObject->FileName.MaximumLength = name.MaximumLength;
FileObject->FileName.Buffer=(PWCHAR)ExAllocatePool(NonPagedPool, name.MaximumLength);

RtlInitUnicodeString( &destinationName, L"\\\\??\\\\G:\\\\user\\\\globaluser.txt" );
RtlCopyUnicodeString(&FileObject->FileName, &destinationName);

FileObject->FileName.Buffer[FileObject->FileName.Length/2] = UNICODE_NULL;

Irp->IoStatus.Status = STATUS_REPARSE;
Irp->IoStatus.Information = IO_REPARSE;
IoCompleteRequest( Irp, IO_NO_INCREMENT );


return STATUS_REPARSE;

}
else
{
IoSkipCurrentIrpStackLocation(Irp);
return IoCallDriver(attachedDevice,Irp);
}

这段代码添加在sfcreate中。现在可以实现同盘文件的重定向，例如，当发打开G:\\globaluser.txt的请求,实际打开的是G:\\user\\globaluser.txt
但将G:\\user\\globaluser.txt改为不同盘的文件时就显示“系统找不到指定路径”，应该是可以实现不同盘重定向操作的，大家帮帮忙。
另外一个问题：请问sfilter可不可以实现网络文件的重定向。

sqiosr
xxxxxx@fcni.com Join Date: 10 Dec 2002
Posts To This List: 47
 
Re: Redirecting FILE_OPEN_BY_FILE_ID to another volume

--------------------------------------------------------------------------------

Bob,

Try this in your create dispatch routine:

Irp->IoStatus.Information = IO_REPARSE;
free the old buffer in IrpSp->FileObject->FileName;
set the new full qualified file name such as \??\d:\dir\fn.xx to
IrpSp->FileObject->FileName;
return STATUS_REPARSE;

Shangwu

多少年的代码，哥顶

路径都多了\\的