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X70Fsd.c
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X70Fsd.c
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/*++
本程序基于minifilter的文件过滤驱动框架实现了layerfsd的基本功能。
遵循GPL v3.0协议，请您严格遵守协议!
本人程序员生涯中有快5年的windows驱动开发，这个程序作为我5年windows驱动开发工作的结束，从此本人将不再写windows驱动，如果您有什么问题可以给我email：[email protected]
欢迎加qq群：26258114 进来跟我们扯淡，聊天，卖萌。
--*/
#include "X70FsdStruct.h"
#include "X70FsdFileInfo.h"
#include "X70FsdCreate.h"
#include "X70FsdData.h"
#include "X70FsdRead.h"
#include "X70FsdWrite.h"
#include "X70FsdCloseCleanup.h"
#include "X70FsdSupport.h"
#include "X70FsdInterface.h"
#include "X70FsdDirCtrl.h"
#pragma prefast(disable:__WARNING_ENCODE_MEMBER_FUNCTION_POINTER, "Not valid for kernel mode drivers")
#define X70FSD_PORT_NAME L"\\PortXiao70"
PFLT_FILTER gFilterHandle = NULL;
extern COMMAND gCommand;
PFLT_PORT gServerPort = NULL;
PFLT_PORT gClientPort = NULL;
ULONG_PTR OperationStatusCtx = 1;
#define CONTEXT_TAG 'x70'
#define PTDBG_TRACE_ROUTINES 0x00000001
#define PTDBG_TRACE_OPERATION_STATUS 0x00000002
ULONG gTraceFlags = 0;
#define PT_DBG_PRINT( _dbgLevel, _string ) \
(FlagOn(gTraceFlags,(_dbgLevel)) ? \
DbgPrint _string : \
((int)0))
/*************************************************************************
Prototypes
*************************************************************************/
DRIVER_INITIALIZE DriverEntry;
NTSTATUS
DriverEntry (
__in PDRIVER_OBJECT DriverObject,
__in PUNICODE_STRING RegistryPath
);
NTSTATUS
PtInstanceSetup (
__in PCFLT_RELATED_OBJECTS FltObjects,
__in FLT_INSTANCE_SETUP_FLAGS Flags,
__in DEVICE_TYPE VolumeDeviceType,
__in FLT_FILESYSTEM_TYPE VolumeFilesystemType
);
VOID
PtInstanceTeardownStart (
__in PCFLT_RELATED_OBJECTS FltObjects,
__in FLT_INSTANCE_TEARDOWN_FLAGS Flags
);
VOID
PtInstanceTeardownComplete (
__in PCFLT_RELATED_OBJECTS FltObjects,
__in FLT_INSTANCE_TEARDOWN_FLAGS Flags
);
NTSTATUS
PtUnload (
__in FLT_FILTER_UNLOAD_FLAGS Flags
);
NTSTATUS
PtInstanceQueryTeardown (
__in PCFLT_RELATED_OBJECTS FltObjects,
__in FLT_INSTANCE_QUERY_TEARDOWN_FLAGS Flags
);
FLT_PREOP_CALLBACK_STATUS
PtPreOperationPassThrough (
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__deref_out_opt PVOID *CompletionContext
);
VOID
PtOperationStatusCallback (
__in PCFLT_RELATED_OBJECTS FltObjects,
__in PFLT_IO_PARAMETER_BLOCK ParameterSnapshot,
__in NTSTATUS OperationStatus,
__in PVOID RequesterContext
);
FLT_POSTOP_CALLBACK_STATUS
PtPostOperationPassThrough (
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__in_opt PVOID CompletionContext,
__in FLT_POST_OPERATION_FLAGS Flags
);
FLT_PREOP_CALLBACK_STATUS
PtPreOperationNoPostOperationPassThrough (
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__deref_out_opt PVOID *CompletionContext
);
BOOLEAN
PtDoRequestOperationStatus(
__in PFLT_CALLBACK_DATA Data
);
VOID
CleanupVolumeContext(
__in PFLT_CONTEXT Context,
__in FLT_CONTEXT_TYPE ContextType
);
NTSTATUS GenerateFileName(IN PFLT_INSTANCE Instance,
IN PFILE_OBJECT FileObject,
IN PFLT_CALLBACK_DATA CallbackData,
IN FLT_FILE_NAME_OPTIONS NameOptions,
OUT PBOOLEAN CacheFileNameInformation,
OUT PFLT_NAME_CONTROL FileName
);
NTSTATUS NormalizeContextCleanupCallback(IN PVOID *NormalizationContext);
NTSTATUS NormalizeNameComponentCallback ( IN PFLT_INSTANCE Instance,
IN PCUNICODE_STRING ParentDirectory,
IN USHORT VolumeNameLength,
IN PCUNICODE_STRING Component,
IN OUT PFILE_NAMES_INFORMATION ExpandComponentName,
IN ULONG ExpandComponentNameLength,
IN FLT_NORMALIZE_NAME_FLAGS Flags,
IN OUT PVOID *NormalizationContext
);
#ifdef ALLOC_PRAGMA
#pragma alloc_text(INIT, DriverEntry)
#pragma alloc_text(PAGE, PtUnload)
#pragma alloc_text(PAGE, PtInstanceQueryTeardown)
#pragma alloc_text(PAGE, PtInstanceSetup)
#pragma alloc_text(PAGE, PtInstanceTeardownStart)
#pragma alloc_text(PAGE, PtInstanceTeardownComplete)
#endif
//
// operation registration
//
CONST FLT_OPERATION_REGISTRATION Callbacks[] = {
{ IRP_MJ_CREATE,
0,
PtPreOperationCreate,
PtPostOperationCreate },
{ IRP_MJ_CREATE_NAMED_PIPE,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_CLOSE,
0,
PtPreOperationClose,
PtPostOperationClose },
{ IRP_MJ_READ,
0,
PtPreOperationRead,
PtPostOperationRead },
{ IRP_MJ_WRITE,
0,
PtPreOperationWrite,
PtPostOperationWrite},
{ IRP_MJ_QUERY_INFORMATION,
0,
PtPreOperationQueryInformation,
PtPostOperationQueryInformation },
{ IRP_MJ_SET_INFORMATION,
0,
PtPreOperationSetInformation,
PtPostOperationSetInformation },
{ IRP_MJ_QUERY_EA,
0,
PtPreOperationQueryEa,
PtPostOperationPassThrough },
{ IRP_MJ_SET_EA,
0,
PtPreOperationSetEa,
PtPostOperationPassThrough },
{ IRP_MJ_FLUSH_BUFFERS,
0,
PtPreOperationFlushBuffers,
PtPostOperationFlushBuffers },
{ IRP_MJ_QUERY_VOLUME_INFORMATION,
0,
PtPreOperationQueryVolumeInformation,
PtPostOperationQueryVolumeInformation },
{ IRP_MJ_SET_VOLUME_INFORMATION,
0,
PtPreOperationSetVolumeInformation,
PtPostOperationSetVolumeInformation },
{ IRP_MJ_DIRECTORY_CONTROL,
0,
PtPreOperationDirCtrl,
PtPostOperationDirCtrl },
{ IRP_MJ_FILE_SYSTEM_CONTROL,
0,
PtPreOperationFileSystemControl,
PtPostOperationFileSystemControl },
{ IRP_MJ_DEVICE_CONTROL,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_INTERNAL_DEVICE_CONTROL,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_SHUTDOWN,
0,
PtPreOperationNoPostOperationPassThrough,
NULL },
{ IRP_MJ_LOCK_CONTROL,
0,
PtPreOperationLockControl,
PtPostOperationLockControl },
{ IRP_MJ_CLEANUP,
0,
PtPreOperationCleanup,
PtPostOperationCleanup },
{ IRP_MJ_CREATE_MAILSLOT,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_QUERY_SECURITY,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_SET_SECURITY,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_QUERY_QUOTA,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_SET_QUOTA,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_PNP,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_ACQUIRE_FOR_SECTION_SYNCHRONIZATION,
0,
PtPreOperationAcquireForCreateSection ,
PtPostOperationAcquireForCreateSection },
{ IRP_MJ_RELEASE_FOR_SECTION_SYNCHRONIZATION,
0,
PtPreOperationReleaseForCreateSection,
PtPostOperationReleaseForCreateSection },
{ IRP_MJ_ACQUIRE_FOR_MOD_WRITE,
0,
PtPreOperationAcquireForModWrite,
PtPostOperationAcquireForModWrite },
{ IRP_MJ_RELEASE_FOR_MOD_WRITE,
0,
PtPreOperationReleaseForModWrite,
PtPostOperationReleaseForModWrite },
{ IRP_MJ_ACQUIRE_FOR_CC_FLUSH,
0,
PtPreOperationAcquireForCcFlush,
PtPostOperationAcquireForCcFlush },
{ IRP_MJ_RELEASE_FOR_CC_FLUSH,
0,
PtPreOperationReleaseForCcFlush,
PtPostOperationReleaseForCcFlush },
{ IRP_MJ_FAST_IO_CHECK_IF_POSSIBLE,
0,
PtPreOperationCheckIfPossible,
PtPostOperationCheckIfPossible },
{ IRP_MJ_NETWORK_QUERY_OPEN,
0,
PtPreOperationNetworkQueryOpen,
PtPostOperationNetworkQueryOpen },
{ IRP_MJ_MDL_READ,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_MDL_READ_COMPLETE,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_PREPARE_MDL_WRITE,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_MDL_WRITE_COMPLETE,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_VOLUME_MOUNT,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_VOLUME_DISMOUNT,
0,
PtPreOperationPassThrough,
PtPostOperationPassThrough },
{ IRP_MJ_OPERATION_END }
};
CONST FLT_CONTEXT_REGISTRATION ContextNotifications[] = {
{ FLT_VOLUME_CONTEXT,
0,
CleanupVolumeContext,
sizeof(VOLUME_CONTEXT),
CONTEXT_TAG },
{ FLT_CONTEXT_END }
};
//
// This defines what we want to filter with FltMgr
//
//
CONST FLT_REGISTRATION FilterRegistration = {
sizeof( FLT_REGISTRATION ), // Size
FLT_REGISTRATION_VERSION, // Version
FLTFL_REGISTRATION_DO_NOT_SUPPORT_SERVICE_STOP, //0 // Flags
ContextNotifications, // Context
Callbacks, // Operation callbacks
PtUnload, // MiniFilterUnload
PtInstanceSetup, // InstanceSetup
PtInstanceQueryTeardown, // InstanceQueryTeardown
PtInstanceTeardownStart, // InstanceTeardownStart
PtInstanceTeardownComplete, // InstanceTeardownComplete
GenerateFileName, //NULL // GenerateFileName
NormalizeNameComponentCallback, // GenerateDestinationFileName
NULL,//NormalizeContextCleanupCallback, // NormalizeNameComponent
};
NTSTATUS NormalizeContextCleanupCallback(IN PVOID *NormalizationContext)
{
NTSTATUS Status = STATUS_UNSUCCESSFUL;
return Status;
}
NTSTATUS GenerateFileName(IN PFLT_INSTANCE Instance,
IN PFILE_OBJECT FileObject,
IN PFLT_CALLBACK_DATA CallbackData,
IN FLT_FILE_NAME_OPTIONS NameOptions,
OUT PBOOLEAN CacheFileNameInformation,
OUT PFLT_NAME_CONTROL FileName
) //上层的minifilter过滤驱动的名字请求进行处理
{
NTSTATUS Status = STATUS_UNSUCCESSFUL;
PFILE_OBJECT StreamObject = FileObject;
PFLT_FILE_NAME_INFORMATION FileNameInformation = NULL;
BOOLEAN bEncryptResource = FALSE;
PFCB Fcb = FileObject->FsContext;
PCCB Ccb = FileObject->FsContext2;
FsRtlEnterFileSystem();
try
{
if(IsMyFakeFcb(FileObject))
{
ExAcquireResourceSharedLite(Fcb->EncryptResource,TRUE);
bEncryptResource = TRUE;
if(BooleanFlagOn(Fcb->FcbState,SCB_STATE_SHADOW_CLOSE) || Ccb->StreamFileInfo.StreamObject == NULL)
{
try_return (Status = STATUS_FILE_DELETED);
}
else
{
StreamObject = Ccb->StreamFileInfo.StreamObject;
}
}
ClearFlag(NameOptions,FLT_FILE_NAME_REQUEST_FROM_CURRENT_PROVIDER);
if(FlagOn(NameOptions,FLT_FILE_NAME_NORMALIZED))
{
ClearFlag(NameOptions,FLT_FILE_NAME_NORMALIZED);
SetFlag(NameOptions,FLT_FILE_NAME_OPENED);
}
if (CallbackData)
{
PFILE_OBJECT TemFileObject = CallbackData->Iopb->TargetFileObject;
CallbackData->Iopb->TargetFileObject = StreamObject;
FltSetCallbackDataDirty(CallbackData);
Status = FltGetFileNameInformation(CallbackData,NameOptions, &FileNameInformation);
CallbackData->Iopb->TargetFileObject = TemFileObject;
FltClearCallbackDataDirty(CallbackData);
}
else
{
Status = FltGetFileNameInformationUnsafe(StreamObject,Instance, NameOptions, &FileNameInformation);
}
if(!NT_SUCCESS(Status))
{
try_return (Status);
}
Status = FltCheckAndGrowNameControl(FileName, FileNameInformation->Name.Length);
if(!NT_SUCCESS(Status))
{
try_return (Status);
}
RtlCopyUnicodeString(&FileName->Name, &FileNameInformation->Name);
if(FileNameInformation != NULL)
{
FltReleaseFileNameInformation(FileNameInformation);
}
Status = STATUS_SUCCESS;
try_exit: NOTHING;
}
finally
{
if(bEncryptResource)
{
ExReleaseResourceLite( Fcb->EncryptResource );
}
}
FsRtlExitFileSystem();
return Status;
}
NTSTATUS NormalizeNameComponentCallback ( IN PFLT_INSTANCE Instance,
IN PCUNICODE_STRING ParentDirectory,
IN USHORT VolumeNameLength,
IN PCUNICODE_STRING Component,
IN OUT PFILE_NAMES_INFORMATION ExpandComponentName,
IN ULONG ExpandComponentNameLength,
IN FLT_NORMALIZE_NAME_FLAGS Flags,
IN OUT PVOID *NormalizationContext
)
{
NTSTATUS Status = STATUS_UNSUCCESSFUL;
return Status;
}
VOID
CleanupVolumeContext(
__in PFLT_CONTEXT Context,
__in FLT_CONTEXT_TYPE ContextType
)
{
PVOLUME_CONTEXT ctx = Context;
PAGED_CODE();
UNREFERENCED_PARAMETER( ContextType );
ASSERT(ContextType == FLT_VOLUME_CONTEXT);
FltDeleteContext(Context);
}
NTSTATUS
PtInstanceSetup (
__in PCFLT_RELATED_OBJECTS FltObjects,
__in FLT_INSTANCE_SETUP_FLAGS Flags,
__in DEVICE_TYPE VolumeDeviceType,
__in FLT_FILESYSTEM_TYPE VolumeFilesystemType
)
{
PDEVICE_OBJECT devObj = NULL;
PVOLUME_CONTEXT ctx = NULL;
PFILE_FS_SIZE_INFORMATION VolumeBuffer = NULL;
NTSTATUS status = STATUS_SUCCESS;
ULONG retLen;
PUNICODE_STRING workingName;
USHORT size;
IO_STATUS_BLOCK IoStatus;
UCHAR volPropBuffer[sizeof(FLT_VOLUME_PROPERTIES)+512];
PFLT_VOLUME_PROPERTIES volProp = (PFLT_VOLUME_PROPERTIES)volPropBuffer;
PAGED_CODE();
UNREFERENCED_PARAMETER( Flags );
UNREFERENCED_PARAMETER( VolumeDeviceType );
UNREFERENCED_PARAMETER( VolumeFilesystemType );
try {
//我们在卷上下文中保存扇区大小跟一个资源，用卷上下文完成vcb的工作
status = FltAllocateContext( FltObjects->Filter,
FLT_VOLUME_CONTEXT,
sizeof(VOLUME_CONTEXT),
NonPagedPool,
&ctx );
if (!NT_SUCCESS(status))
{
leave;
}
status = FltGetVolumeProperties( FltObjects->Volume,
volProp,
sizeof(volPropBuffer),
&retLen );
if (!NT_SUCCESS(status))
{
leave;
}
ASSERT((volProp->SectorSize == 0) || (volProp->SectorSize >= MIN_SECTOR_SIZE));
if(volProp->SectorSize > MAX_SECTOR_SIZE)
{
DbgPrint("volProp->SectorSize false %d \n",volProp->SectorSize );
status = STATUS_UNSUCCESSFUL;
leave;
}
ctx->SectorSize = max(volProp->SectorSize ,MIN_SECTOR_SIZE);
ctx->VolResource = X70FsdAllocateResource();
ctx->DeviceType = volProp->DeviceType;
VolumeBuffer = FltAllocatePoolAlignedWithTag(FltObjects->Instance,NonPagedPool,sizeof(FILE_FS_SIZE_INFORMATION),'clu');
if(VolumeBuffer == NULL)
{
status = STATUS_INSUFFICIENT_RESOURCES;
leave;
}
status = FltQueryVolumeInformation(
FltObjects->Instance,
&IoStatus,
VolumeBuffer,
sizeof(FILE_FS_SIZE_INFORMATION),
FileFsSizeInformation
);
if (NT_SUCCESS(status))
{
ctx->SectorsPerAllocationUnit = VolumeBuffer->SectorsPerAllocationUnit;
}
else
{
ctx->SectorsPerAllocationUnit = 1; //网络设备会返回失败。
}
FltIsVolumeWritable(FltObjects->Volume,&ctx->IsWritable );
status = FltSetVolumeContext( FltObjects->Volume,
FLT_SET_CONTEXT_KEEP_IF_EXISTS,
ctx,
NULL );
if (status == STATUS_FLT_CONTEXT_ALREADY_DEFINED)
{
status = STATUS_SUCCESS;
}
}
finally
{
if (ctx != NULL)
{
FltReleaseContext( ctx );
}
if(VolumeBuffer != NULL)
{
FltFreePoolAlignedWithTag(FltObjects->Instance,VolumeBuffer,'clu');
}
}
return status;
}
NTSTATUS
PtInstanceQueryTeardown (
__in PCFLT_RELATED_OBJECTS FltObjects,
__in FLT_INSTANCE_QUERY_TEARDOWN_FLAGS Flags
)
{
PAGED_CODE();
UNREFERENCED_PARAMETER( FltObjects );
UNREFERENCED_PARAMETER( Flags );
return STATUS_SUCCESS;
}
VOID
PtInstanceTeardownStart (
__in PCFLT_RELATED_OBJECTS FltObjects,
__in FLT_INSTANCE_TEARDOWN_FLAGS Flags
)
/*++
Routine Description:
This routine is called at the start of instance teardown.
Arguments:
FltObjects - Pointer to the FLT_RELATED_OBJECTS data structure containing
opaque handles to this filter, instance and its associated volume.
Flags - Reason why this instance is been deleted.
Return Value:
None.
--*/
{
UNREFERENCED_PARAMETER( FltObjects );
UNREFERENCED_PARAMETER( Flags );
PAGED_CODE();
PT_DBG_PRINT( PTDBG_TRACE_ROUTINES,
("PassThrough!PtInstanceTeardownStart: Entered\n") );
}
VOID
PtInstanceTeardownComplete (
__in PCFLT_RELATED_OBJECTS FltObjects,
__in FLT_INSTANCE_TEARDOWN_FLAGS Flags
)
/*++
Routine Description:
This routine is called at the end of instance teardown.
Arguments:
FltObjects - Pointer to the FLT_RELATED_OBJECTS data structure containing
opaque handles to this filter, instance and its associated volume.
Flags - Reason why this instance is been deleted.
Return Value:
None.
--*/
{
UNREFERENCED_PARAMETER( FltObjects );
UNREFERENCED_PARAMETER( Flags );
PAGED_CODE();
PT_DBG_PRINT( PTDBG_TRACE_ROUTINES,
("PassThrough!PtInstanceTeardownComplete: Entered\n") );
}
/*************************************************************************
MiniFilter initialization and unload routines.
*************************************************************************/
NTSTATUS
DriverEntry (
__in PDRIVER_OBJECT DriverObject,
__in PUNICODE_STRING RegistryPath
)
/*++
Routine Description:
This is the initialization routine for this miniFilter driver. This
registers with FltMgr and initializes all global data structures.
Arguments:
DriverObject - Pointer to driver object created by the system to
represent this driver.
RegistryPath - Unicode string identifying where the parameters for this
driver are located in the registry.
Return Value:
Returns STATUS_SUCCESS.
--*/
{
NTSTATUS status;
BOOLEAN bInit = FALSE;
PSECURITY_DESCRIPTOR sd;
OBJECT_ATTRIBUTES oa;
UNICODE_STRING uniString;
UNREFERENCED_PARAMETER( RegistryPath );
PT_DBG_PRINT( PTDBG_TRACE_ROUTINES,
("PassThrough!DriverEntry: Entered\n") );
try
{
status = FltRegisterFilter( DriverObject,
&FilterRegistration,
&gFilterHandle );
if (!NT_SUCCESS( status ))
{
leave;
}
#ifdef CV
VirtualizerStart();
#endif
status = InitDriverEntry( DriverObject,RegistryPath);
#ifdef CV
VirtualizerEnd();
#endif
if (!NT_SUCCESS( status ))
{
bInit = FALSE;
leave;
}
bInit = TRUE;
status = FltBuildDefaultSecurityDescriptor( &sd,
FLT_PORT_ALL_ACCESS );
if (!NT_SUCCESS( status ))
{
leave;
}
RtlInitUnicodeString( &uniString, X70FSD_PORT_NAME );
InitializeObjectAttributes( &oa,
&uniString,
OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE,
NULL,
sd );
status = FltCreateCommunicationPort( gFilterHandle,
&gServerPort,
&oa,
NULL,
PtMiniConnect,
PtMiniDisconnect,
PtMiniMessage,
1 );
FltFreeSecurityDescriptor( sd );
if (!NT_SUCCESS( status ))
{
leave;
}
status = FltStartFiltering( gFilterHandle );
}
finally
{
if (!NT_SUCCESS( status ) )
{
if (NULL != gServerPort)
{
FltCloseCommunicationPort( gServerPort);
}
if (NULL != gFilterHandle)
{
FltUnregisterFilter( gFilterHandle );
}
if(bInit)
{
UnloadDriver();
}
}
}
return status;
}
NTSTATUS
PtUnload (
__in FLT_FILTER_UNLOAD_FLAGS Flags
)
/*++
Routine Description:
This is the unload routine for this miniFilter driver. This is called
when the minifilter is about to be unloaded. We can fail this unload
request if this is not a mandatory unloaded indicated by the Flags
parameter.
Arguments:
Flags - Indicating if this is a mandatory unload.
Return Value:
Returns the final status of this operation.
--*/
{
UNREFERENCED_PARAMETER( Flags );
PAGED_CODE();
UnloadDriver();
PT_DBG_PRINT( PTDBG_TRACE_ROUTINES,
("PassThrough!PtUnload: Entered\n") );
FltUnregisterFilter( gFilterHandle );
return STATUS_SUCCESS;
}
/*************************************************************************
MiniFilter callback routines.
*************************************************************************/
FLT_PREOP_CALLBACK_STATUS
PtPreOperationPassThrough (
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__deref_out_opt PVOID *CompletionContext
)
/*++
Routine Description:
This routine is the main pre-operation dispatch routine for this
miniFilter. Since this is just a simple passThrough miniFilter it
does not do anything with the callbackData but rather return
FLT_PREOP_SUCCESS_WITH_CALLBACK thereby passing it down to the next
miniFilter in the chain.
This is non-pageable because it could be called on the paging path
Arguments:
Data - Pointer to the filter callbackData that is passed to us.
FltObjects - Pointer to the FLT_RELATED_OBJECTS data structure containing
opaque handles to this filter, instance, its associated volume and
file object.
CompletionContext - The context for the completion routine for this
operation.
Return Value:
The return value is the status of the operation.
--*/
{
NTSTATUS status;
FLT_PREOP_CALLBACK_STATUS FltStatus = FLT_PREOP_COMPLETE;
UNREFERENCED_PARAMETER( FltObjects );
UNREFERENCED_PARAMETER( CompletionContext );
PT_DBG_PRINT( PTDBG_TRACE_ROUTINES,
("PassThrough!PtPreOperationPassThrough: Entered\n") );
if(IsMyFakeFcb(FltObjects->FileObject))
{
if(FLT_IS_FASTIO_OPERATION(Data))
{
FltStatus = FLT_PREOP_DISALLOW_FASTIO ;
return FltStatus;
}
if(FLT_IS_IRP_OPERATION(Data))
{
FltStatus = X70FsdPrePassThroughIrp(Data,FltObjects,CompletionContext);
return FltStatus;
}
if(FLT_IS_FS_FILTER_OPERATION(Data))
{
Data->IoStatus.Status = STATUS_INVALID_DEVICE_REQUEST;
return FltStatus;
}
}
//
// See if this is an operation we would like the operation status
// for. If so request it.
//
// NOTE: most filters do NOT need to do this. You only need to make
// this call if, for example, you need to know if the oplock was
// actually granted.
//
if (PtDoRequestOperationStatus( Data )) {
status = FltRequestOperationStatusCallback( Data,
PtOperationStatusCallback,
(PVOID)(++OperationStatusCtx) );
if (!NT_SUCCESS(status)) {
PT_DBG_PRINT( PTDBG_TRACE_OPERATION_STATUS,
("PassThrough!PtPreOperationPassThrough: FltRequestOperationStatusCallback Failed, status=%08x\n",
status) );
}
}
return FLT_PREOP_SUCCESS_WITH_CALLBACK;
}
VOID
PtOperationStatusCallback (
__in PCFLT_RELATED_OBJECTS FltObjects,
__in PFLT_IO_PARAMETER_BLOCK ParameterSnapshot,
__in NTSTATUS OperationStatus,
__in PVOID RequesterContext
)
/*++
Routine Description: