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X70FsdFileInfo.c
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X70FsdFileInfo.c
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#include "X70FsdData.h"
#include "X70FsdFileInfo.h"
extern CACHE_MANAGER_CALLBACKS G_CacheMgrCallbacks;
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//完成卷查询接口
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
FLT_PREOP_CALLBACK_STATUS
PtPreOperationQueryVolumeInformation (
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__deref_out_opt PVOID *CompletionContext
)
{
//用自己的文件对象下发然后完成请求
NTSTATUS Status;
PFLT_CALLBACK_DATA RetNewCallbackData = NULL;
PVOLUME_CONTEXT volCtx = NULL;
PVOID VolumeBuffer;
PFLT_IO_PARAMETER_BLOCK Iopb = Data->Iopb;
FS_INFORMATION_CLASS FsInformationClass;
PFILE_OBJECT FileObject;
PFCB Fcb;
PCCB Ccb;
BOOLEAN AcquireResource = FALSE;
FsRtlEnterFileSystem();
//
if(!IsMyFakeFcb(FltObjects->FileObject))
{
FsRtlExitFileSystem();
return FLT_PREOP_SUCCESS_NO_CALLBACK;
}
Status = FltGetVolumeContext( FltObjects->Filter,
FltObjects->Volume,
&volCtx );
if(!NT_SUCCESS(Status))
{
Data->IoStatus.Status = Status;
Data->IoStatus.Information = 0;
FsRtlExitFileSystem();
return FLT_PREOP_COMPLETE;
}
VolumeBuffer = Iopb->Parameters.SetVolumeInformation.VolumeBuffer;
FsInformationClass = Iopb->Parameters.SetVolumeInformation.FsInformationClass;
FileObject = FltObjects->FileObject;
Fcb = (PFCB)FileObject->FsContext;
Ccb = (PCCB)FileObject->FsContext2;
try{
ExAcquireResourceSharedLite(volCtx->VolResource, TRUE);
AcquireResource = TRUE;
if(Ccb->StreamFileInfo.StreamObject == NULL)
{
try_return(Data->IoStatus.Status = STATUS_FILE_DELETED);
}
Status = FltAllocateCallbackData(FltObjects->Instance,Ccb->StreamFileInfo.StreamObject,&RetNewCallbackData);
if(NT_SUCCESS(Status))
{
RtlCopyMemory(RetNewCallbackData->Iopb,Data->Iopb,sizeof(FLT_IO_PARAMETER_BLOCK));
RetNewCallbackData->Iopb->TargetFileObject = Ccb->StreamFileInfo.StreamObject;
FltPerformSynchronousIo(RetNewCallbackData);
Status = RetNewCallbackData->IoStatus.Status;
Data->IoStatus = RetNewCallbackData->IoStatus;
if(NT_SUCCESS(Status))
{
if(FsInformationClass == FileFsSizeInformation) //更新下扇区大小跟簇大小
{
volCtx->SectorsPerAllocationUnit = ((PFILE_FS_SIZE_INFORMATION)VolumeBuffer)->SectorsPerAllocationUnit;
volCtx->SectorSize = ((PFILE_FS_SIZE_INFORMATION)VolumeBuffer)->BytesPerSector;
}
if(FsInformationClass == FileFsFullSizeInformation)
{
volCtx->SectorsPerAllocationUnit = ((PFILE_FS_FULL_SIZE_INFORMATION)VolumeBuffer)->SectorsPerAllocationUnit;
volCtx->SectorSize = ((PFILE_FS_FULL_SIZE_INFORMATION)VolumeBuffer)->BytesPerSector;
}
}
}
try_exit:NOTHING;
}
finally
{
if(RetNewCallbackData != NULL)
{
FltFreeCallbackData(RetNewCallbackData);
}
if(AcquireResource)
{
ExReleaseResourceLite(volCtx->VolResource);
}
if(volCtx != NULL)
{
FltReleaseContext(volCtx);
}
}
FsRtlExitFileSystem();
return FLT_PREOP_COMPLETE;
}
FLT_PREOP_CALLBACK_STATUS
PtPreOperationSetVolumeInformation (
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__deref_out_opt PVOID *CompletionContext
)
{
//用自己的文件对象下发然后完成请求
NTSTATUS Status;
PFLT_CALLBACK_DATA RetNewCallbackData = NULL;
PVOLUME_CONTEXT volCtx = NULL;
PFLT_IO_PARAMETER_BLOCK Iopb = Data->Iopb;
PVOID VolumeBuffer;
PFILE_OBJECT FileObject;
PFCB Fcb;
PCCB Ccb;
BOOLEAN AcquireResource = FALSE;
FsRtlEnterFileSystem();
//
if(!IsMyFakeFcb(FltObjects->FileObject))
{
FsRtlExitFileSystem();
return FLT_PREOP_SUCCESS_NO_CALLBACK;
}
Status = FltGetVolumeContext( FltObjects->Filter,
FltObjects->Volume,
&volCtx );
if(!NT_SUCCESS(Status))
{
Data->IoStatus.Status = Status;
Data->IoStatus.Information = 0;
FsRtlExitFileSystem();
return FLT_PREOP_COMPLETE;
}
FileObject = FltObjects->FileObject;
Fcb = (PFCB)FileObject->FsContext;
Ccb = (PCCB)FileObject->FsContext2;
try
{
ExAcquireResourceExclusiveLite(volCtx->VolResource, TRUE);
AcquireResource = TRUE;
if(Ccb->StreamFileInfo.StreamObject == NULL)
{
try_return(Data->IoStatus.Status = STATUS_FILE_DELETED);
}
Status = FltAllocateCallbackData(FltObjects->Instance,Ccb->StreamFileInfo.StreamObject,&RetNewCallbackData);
if(NT_SUCCESS(Status))
{
RtlCopyMemory(RetNewCallbackData->Iopb,Data->Iopb,sizeof(FLT_IO_PARAMETER_BLOCK));
RetNewCallbackData->Iopb->TargetFileObject = Ccb->StreamFileInfo.StreamObject;
FltPerformSynchronousIo(RetNewCallbackData);
Status = RetNewCallbackData->IoStatus.Status;
Data->IoStatus = RetNewCallbackData->IoStatus;
}
try_exit: NOTHING;
}
finally
{
if(RetNewCallbackData != NULL)
{
FltFreeCallbackData(RetNewCallbackData);
}
if(AcquireResource)
{
ExReleaseResourceLite(volCtx->VolResource);
}
if(volCtx != NULL)
{
FltReleaseContext(volCtx);
}
}
FsRtlExitFileSystem();
return FLT_PREOP_COMPLETE;
}
FLT_POSTOP_CALLBACK_STATUS
PtPostOperationQueryVolumeInformation (
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__in_opt PVOID CompletionContext,
__in FLT_POST_OPERATION_FLAGS Flags
)
{
UNREFERENCED_PARAMETER( Data );
UNREFERENCED_PARAMETER( FltObjects );
UNREFERENCED_PARAMETER( CompletionContext );
UNREFERENCED_PARAMETER( Flags );
return FLT_POSTOP_FINISHED_PROCESSING;
}
FLT_POSTOP_CALLBACK_STATUS
PtPostOperationSetVolumeInformation (
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__in_opt PVOID CompletionContext,
__in FLT_POST_OPERATION_FLAGS Flags
)
{
UNREFERENCED_PARAMETER( Data );
UNREFERENCED_PARAMETER( FltObjects );
UNREFERENCED_PARAMETER( CompletionContext );
UNREFERENCED_PARAMETER( Flags );
return FLT_POSTOP_FINISHED_PROCESSING;
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//文件查询接口
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
FLT_POSTOP_CALLBACK_STATUS
PtPostOperationQueryInformation (
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__in_opt PVOID CompletionContext,
__in FLT_POST_OPERATION_FLAGS Flags
)
{
UNREFERENCED_PARAMETER( Data );
UNREFERENCED_PARAMETER( FltObjects );
UNREFERENCED_PARAMETER( CompletionContext );
UNREFERENCED_PARAMETER( Flags );
return FLT_POSTOP_FINISHED_PROCESSING;
}
//完成文件查询接口
FLT_PREOP_CALLBACK_STATUS
PtPreOperationQueryInformation (
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__deref_out_opt PVOID *CompletionContext
)
{
FLT_PREOP_CALLBACK_STATUS FltStatus;
PIRP_CONTEXT IrpContext = NULL;
BOOLEAN TopLevel = FALSE;
FsRtlEnterFileSystem();
if(!IsMyFakeFcb(FltObjects->FileObject))
{
FsRtlExitFileSystem();
return FLT_PREOP_SUCCESS_NO_CALLBACK;
}
if(FLT_IS_IRP_OPERATION(Data)) //irp query
{
//
//设置顶层组件
TopLevel = X70FsdIsIrpTopLevel( Data );
//创建irp上下文
try
{
IrpContext = X70FsdCreateIrpContext( Data,FltObjects, CanFsdWait( Data ) );
if(IrpContext == NULL)
{
X70FsdRaiseStatus(IrpContext,STATUS_INSUFFICIENT_RESOURCES);
}
FltStatus = X70FsdCommonQueryInformation(Data, FltObjects,IrpContext);
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
//出现异常直接返回
DbgPrint("queryinfo出现异常直接返回 \n");
X70FsdProcessException(&IrpContext,&Data,GetExceptionCode());
FltStatus = FLT_PREOP_COMPLETE;
}
if (TopLevel) { IoSetTopLevelIrp( NULL ); }
}
else if(FLT_IS_FASTIO_OPERATION(Data)) //fastio read
{
//DbgPrint("FastIo queryinfo \n");
FltStatus = FLT_PREOP_DISALLOW_FASTIO ;// X70FsdFastIoRead(Data, FltObjects);
}
else
{
Data->IoStatus.Status = STATUS_INSUFFICIENT_RESOURCES;
Data->IoStatus.Information = 0;
FltStatus = FLT_PREOP_COMPLETE;
/*FltStatus = FLT_PREOP_SUCCESS_NO_CALLBACK;*/
DbgPrint("收到其他的queryinfo类型请求 \n");
}
FsRtlExitFileSystem();
return FltStatus;
}
//
FLT_PREOP_CALLBACK_STATUS
X70FsdCommonQueryInformation(
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__in PIRP_CONTEXT IrpContext)
{
//用原始文件对象进行文件的查询
NTSTATUS Status = STATUS_SUCCESS;
FLT_PREOP_CALLBACK_STATUS FltStatus = FLT_PREOP_COMPLETE;
ULONG Length = 0 ,LengthReturned = 0;
FILE_INFORMATION_CLASS FileInformationClass;
PFLT_IO_PARAMETER_BLOCK Iopb = Data->Iopb;
PVOID InfoBuffer ;
//PVOID QueryBuffer = NULL;
PFILE_OBJECT FileObject;
PFCB Fcb;
PCCB Ccb;
PFLT_CALLBACK_DATA RetNewCallbackData = NULL;
BOOLEAN PostIrp = FALSE;
PVOLUME_CONTEXT volCtx = NULL;
BOOLEAN AcquireResource = FALSE;
BOOLEAN AcquireVolResource = FALSE;
BOOLEAN ReleaseScbPaging = FALSE;
PDEVICE_OBJECT pVolumeDevObj,DeviceObject;
BOOLEAN FcbAcquired = FALSE;
BOOLEAN EncryptResourceAcquired = FALSE;
BOOLEAN NonCachedIoPending = FALSE;
if(FltObjects == NULL)
{
FltObjects = &IrpContext->FltObjects;
}
try{
LengthReturned = Length = Iopb->Parameters.QueryFileInformation.Length;
FileInformationClass = Iopb->Parameters.QueryFileInformation.FileInformationClass;
InfoBuffer = Iopb->Parameters.QueryFileInformation.InfoBuffer ;
FileObject = FltObjects->FileObject;
Fcb = (PFCB)FileObject->FsContext;
Ccb = FileObject->FsContext2;
if (!X70FsdAcquireSharedFcb( IrpContext, Fcb ))
{
Status = X70FsdPostRequest(Data, IrpContext );
IrpContext = NULL;
NonCachedIoPending = TRUE;
try_return( Status );
}
FcbAcquired = TRUE;
ExAcquireResourceSharedLite(Fcb->EncryptResource,TRUE);
EncryptResourceAcquired = TRUE;
//DbgPrint("查询文件信息 %d ,%ws \n",FileInformationClass,FileObject->FileName.Buffer);
//QueryBuffer = FltAllocatePoolAlignedWithTag(FltObjects->Instance,NonPagedPool,Length,'qfi');
//if(QueryBuffer == NULL)
//{
// try_return(Status = STATUS_INSUFFICIENT_RESOURCES);
//}
//RtlZeroMemory(QueryBuffer,Length);
//RtlCopyMemory(QueryBuffer,InfoBuffer,Length);
if(Ccb->StreamFileInfo.StreamObject == NULL)
{
try_return(Status = STATUS_FILE_DELETED);
}
Status = FltAllocateCallbackData(FltObjects->Instance,Ccb->StreamFileInfo.StreamObject,&RetNewCallbackData);
if(NT_SUCCESS(Status))
{
RtlCopyMemory(RetNewCallbackData->Iopb,Data->Iopb,sizeof(FLT_IO_PARAMETER_BLOCK));
//RetNewCallbackData->Iopb->Parameters.QueryFileInformation.InfoBuffer = QueryBuffer;
//RetNewCallbackData->Iopb->Parameters.QueryFileInformation.Length = Length;
ClearFlag(RetNewCallbackData->Iopb->IrpFlags,IRP_PAGING_IO);
RetNewCallbackData->Iopb->TargetFileObject = Ccb->StreamFileInfo.StreamObject;
FltPerformSynchronousIo(RetNewCallbackData);
Status = RetNewCallbackData->IoStatus.Status;
Data->IoStatus = RetNewCallbackData->IoStatus;
//RtlCopyMemory(InfoBuffer,QueryBuffer,Length);
if(NT_SUCCESS(Status) ||
(Status == STATUS_BUFFER_OVERFLOW))
{
//处理文件大小等参数
switch(FileInformationClass)
{
case FileAllInformation:
{
// FileAllInformation
PFILE_ALL_INFORMATION fai;
fai = (PFILE_ALL_INFORMATION)InfoBuffer;
if(Ccb->FileAccess == FILE_ONLY_READ && Length >= sizeof(FILE_BASIC_INFORMATION))
{
SetFlag(fai->BasicInformation.FileAttributes,FILE_ATTRIBUTE_READONLY);
}
if(Length >= (sizeof(FILE_BASIC_INFORMATION)+sizeof(FILE_STANDARD_INFORMATION)))
{
fai->StandardInformation.EndOfFile.QuadPart = Fcb->Header.FileSize.QuadPart;
fai->StandardInformation.AllocationSize.QuadPart = Fcb->Header.AllocationSize.QuadPart;
}
if(Length >= (sizeof(FILE_BASIC_INFORMATION)
+sizeof(FILE_STANDARD_INFORMATION)
+sizeof(FILE_INTERNAL_INFORMATION)
+sizeof(FILE_EA_INFORMATION)
+sizeof(FILE_ACCESS_INFORMATION)
+sizeof(FILE_POSITION_INFORMATION)))
{
fai->PositionInformation.CurrentByteOffset = FileObject->CurrentByteOffset;
}
}
break;
case FileBasicInformation:
{
PFILE_BASIC_INFORMATION fbi;
fbi = (PFILE_BASIC_INFORMATION)InfoBuffer;
if(Ccb->FileAccess == FILE_ONLY_READ)
{
SetFlag(fbi->FileAttributes,FILE_ATTRIBUTE_READONLY);
}
}
break;
case FileAttributeTagInformation:
{
PFILE_ATTRIBUTE_TAG_INFORMATION fati;
fati = (PFILE_ATTRIBUTE_TAG_INFORMATION)InfoBuffer;
if(Ccb->FileAccess == FILE_ONLY_READ)
{
SetFlag(fati->FileAttributes,FILE_ATTRIBUTE_READONLY);
}
}
break;
case FileStandardInformation:
{
PFILE_STANDARD_INFORMATION fsi;
fsi = (PFILE_STANDARD_INFORMATION)InfoBuffer;
fsi->EndOfFile.QuadPart = Fcb->Header.FileSize.QuadPart;
// 保留文件标识部分
fsi->AllocationSize.QuadPart = Fcb->Header.AllocationSize.QuadPart;
}
break;
case FilePositionInformation:
{
PFILE_POSITION_INFORMATION fpi;
fpi = (PFILE_POSITION_INFORMATION)InfoBuffer;
fpi->CurrentByteOffset = FltObjects->FileObject->CurrentByteOffset;
}
break;
case FileNetworkOpenInformation:
{
PFILE_NETWORK_OPEN_INFORMATION fnoi;
fnoi = (PFILE_NETWORK_OPEN_INFORMATION)InfoBuffer;
//DbgPrint("查询网络信息 \n");
fnoi->EndOfFile.QuadPart = Fcb->Header.FileSize.QuadPart;
// 保留文件标识部分
fnoi->AllocationSize.QuadPart = Fcb->Header.AllocationSize.QuadPart;
}
break;
case FileStreamInformation: //如果加密文件流的话，这里相关文件流的大小必须返回正确的数据，最好是访问一下设备然后去读一下加密头
{
WCHAR NtfsData[] = L"::$DATA";
WCHAR StreamData[] = L":$DATA";
PFILE_STREAM_INFORMATION fsi;
ULONG offset = 0;
fsi = (PFILE_STREAM_INFORMATION)InfoBuffer;
#ifdef CV
VirtualizerStart();
#endif
do
{
offset = fsi->NextEntryOffset;
//默认流为文件本身
if( (fsi->StreamNameLength == 0 ) ||
((fsi->StreamNameLength == (sizeof(NtfsData)-sizeof(WCHAR))) &&
(RtlCompareMemory(fsi->StreamName,NtfsData,fsi->StreamNameLength) == fsi->StreamNameLength)))
{
fsi->StreamSize.QuadPart = Fcb->Header.FileSize.QuadPart;
// 保留文件标识部分
fsi->StreamAllocationSize.QuadPart = Fcb->Header.AllocationSize.QuadPart;
}
//NTFS文件流暂时不考虑
//else if(fsi->StreamNameLength >= sizeof(StreamData) &&
// (RtlCompareMemory(
// Add2Ptr(fsi->StreamName,fsi->StreamNameLength-sizeof(StreamData)+sizeof(WCHAR)),
// StreamData,
// sizeof(StreamData)-sizeof(WCHAR)
// ) == sizeof(StreamData)-sizeof(WCHAR)))//修改跟这个文件关联流的大小
//{
// BOOLEAN IsEnFile = FALSE;
// NTSTATUS StrStatus;
// //fsi->StreamSize.QuadPart -= Fcb->FileHeaderLength;
// StrStatus = GetFileStreamRealSize( IrpContext,
// FltObjects,
// fsi->StreamName,
// fsi->StreamNameLength,
// &IsEnFile);
// if(NT_SUCCESS(StrStatus) && IsEnFile)
// {
// fsi->StreamSize.QuadPart = IrpContext->CreateInfo.RealFileSize.QuadPart;
// fsi->StreamAllocationSize.QuadPart -= FILE_HEADER_LENGTH;
// }
//}
fsi = (PFILE_STREAM_INFORMATION)Add2Ptr(fsi,offset);
}
while(offset != 0);
#ifdef CV
VirtualizerEnd();
#endif
}
break;
default:
//DbgPrint("收到其他查询请求 %d \n",FileInformationClass);
break;
}
}
}
try_exit: NOTHING;
}
finally
{
if (FcbAcquired)
{
X70FsdReleaseFcb( IrpContext, Fcb );
}
if(AcquireVolResource)
{
ExReleaseResourceLite(volCtx->VolResource);
}
if(volCtx != NULL)
{
FltReleaseContext(volCtx);
}
if(EncryptResourceAcquired)
{
ExReleaseResourceLite( Fcb->EncryptResource );
}
if(RetNewCallbackData != NULL)
{
FltFreeCallbackData(RetNewCallbackData);
}
//if(QueryBuffer != NULL)
//{
// FltFreePoolAlignedWithTag(FltObjects->Instance,QueryBuffer,'qfi');
//}
if(!NT_SUCCESS(Status))
{
//DbgPrint("QueryInformation %ws 请求 %d 出错 ,%x \n ",FileObject->FileName.Buffer,FileInformationClass,Status);
}
if(Status == STATUS_PENDING)
{
FltStatus = FLT_PREOP_PENDING;
}
else
{
Data->IoStatus.Status = Status;
FltStatus = FLT_PREOP_COMPLETE;
}
if(!AbnormalTermination())
{
X70FsdCompleteRequest( &IrpContext, &Data, Data->IoStatus.Status,FALSE );
}
}
return FltStatus;
}
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//文件设置接口
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//对文件信息设置接口
FLT_POSTOP_CALLBACK_STATUS
PtPostOperationSetInformation (
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__in_opt PVOID CompletionContext,
__in FLT_POST_OPERATION_FLAGS Flags
)
{
UNREFERENCED_PARAMETER( Data );
UNREFERENCED_PARAMETER( FltObjects );
UNREFERENCED_PARAMETER( CompletionContext );
UNREFERENCED_PARAMETER( Flags );
return FLT_POSTOP_FINISHED_PROCESSING;
}
FLT_PREOP_CALLBACK_STATUS
PtPreOperationSetInformation (
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__deref_out_opt PVOID *CompletionContext
)
{
FLT_PREOP_CALLBACK_STATUS FltStatus;
PIRP_CONTEXT IrpContext = NULL;
BOOLEAN TopLevel = FALSE;
PAGED_CODE();
FsRtlEnterFileSystem();
if(!IsMyFakeFcb(FltObjects->FileObject))
{
FsRtlExitFileSystem();
return FLT_PREOP_SUCCESS_NO_CALLBACK;
}
if(FLT_IS_IRP_OPERATION(Data)) //irp query
{
//
//设置顶层组件
TopLevel = X70FsdIsIrpTopLevel( Data );
//创建irp上下文
try
{
IrpContext = X70FsdCreateIrpContext( Data,FltObjects, CanFsdWait( Data ) );
if(IrpContext == NULL)
{
X70FsdRaiseStatus(IrpContext,STATUS_INSUFFICIENT_RESOURCES);
}
FltStatus = X70FsdCommonSetInformation(Data, FltObjects,IrpContext);
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
//出现异常直接返回
DbgPrint("setinfo出现异常直接返回 \n");
X70FsdProcessException(&IrpContext,&Data,GetExceptionCode());
FltStatus = FLT_PREOP_COMPLETE;
}
// 恢复Top-Level IRP
if (TopLevel) { IoSetTopLevelIrp( NULL ); }
}
else if(FLT_IS_FASTIO_OPERATION(Data)) //fastio read
{
//DbgPrint("FastIo setinfo \n");
FltStatus = FLT_PREOP_DISALLOW_FASTIO ;//
}
else
{
Data->IoStatus.Status = STATUS_INSUFFICIENT_RESOURCES;
Data->IoStatus.Information = 0;
FltStatus = FLT_PREOP_COMPLETE;
/*FltStatus = FLT_PREOP_SUCCESS_NO_CALLBACK;*/
DbgPrint("收到其他的setinfo类型请求 \n");
}
FsRtlExitFileSystem();
return FltStatus;
}
//对文件信息设置接口
FLT_PREOP_CALLBACK_STATUS
X70FsdCommonSetInformation(
__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__in PIRP_CONTEXT IrpContext
)
{
NTSTATUS Status;
ULONG Length = 0 ;
FILE_INFORMATION_CLASS FileInformationClass;
PFLT_IO_PARAMETER_BLOCK Iopb = Data->Iopb;
PVOID InfoBuffer = NULL ;
PFILE_OBJECT FileObject;
PFCB Fcb;
PCCB Ccb;
PCCB TargetCcb;
BOOLEAN PostIrp = FALSE;
FLT_PREOP_CALLBACK_STATUS FltStatus;
PFLT_CALLBACK_DATA RetNewCallbackData = NULL;
PVOLUME_CONTEXT volCtx = NULL;
BOOLEAN AcquireVolResource = FALSE;
BOOLEAN ReleaseScbPaging = FALSE;
BOOLEAN FsRtlHeaderLocked = FALSE;
BOOLEAN FcbAcquired = FALSE;
BOOLEAN PagingIoResourceAcquired = FALSE;
BOOLEAN FileSizeChanged = FALSE;
BOOLEAN NonCachedIoPending = FALSE;
BOOLEAN FOResourceAcquired =FALSE;
BOOLEAN EncryptResourceAcquired = FALSE;
BOOLEAN Delete = FALSE;
if(FltObjects == NULL)
{
FltObjects = &IrpContext->FltObjects;
}
try{
Status = FltGetVolumeContext( FltObjects->Filter,
FltObjects->Volume,
&volCtx );
if(!NT_SUCCESS(Status))
{
Data->IoStatus.Status = Status;
Data->IoStatus.Information = 0;
try_return(FltStatus = FLT_PREOP_COMPLETE);
}
Length = Iopb->Parameters.SetFileInformation.Length;
FileInformationClass = Iopb->Parameters.SetFileInformation.FileInformationClass;
InfoBuffer = Iopb->Parameters.SetFileInformation.InfoBuffer ;
FileObject = FltObjects->FileObject;
Fcb = (PFCB)FileObject->FsContext;
Ccb = FileObject->FsContext2;
//DbgPrint("收到SetInfo %ws \n",FileObject->FileName.Buffer);
if(FileInformationClass == FileEndOfFileInformation ||
FileInformationClass == FileValidDataLengthInformation ||
FileInformationClass == FileAllocationInformation)
{
FLT_PREOP_CALLBACK_STATUS FltOplockStatus;
FltOplockStatus = FltCheckOplock( &Fcb->Oplock,
Data,
IrpContext,
NULL,
NULL );
if (FltOplockStatus != FLT_PREOP_SUCCESS_WITH_CALLBACK )
{
try_return( Data->IoStatus.Status );
}
ExAcquireFastMutex(Fcb->Header.FastMutex);
if ( FltOplockIsFastIoPossible(&Fcb->Oplock) )
{
if ( Fcb->FileLock &&
Fcb->FileLock->FastIoIsQuestionable )
{
Fcb->Header.IsFastIoPossible = FastIoIsQuestionable;
}
else
{
Fcb->Header.IsFastIoPossible = FastIoIsPossible;
}
}
else
{
Fcb->Header.IsFastIoPossible = FastIoIsNotPossible;
}
ExReleaseFastMutex(Fcb->Header.FastMutex);
if(!Fcb->IsEnFile && BooleanFlagOn(Fcb->FileType,FILE_ACCESS_WRITE_CHANGE_TO_ENCRYPTION)) //文件修改过需要转变成加密文件
{
//对文件进行加密
DbgPrint("对非加密文件加密\n");
Status = TransformFileToEncrypted(Data,FltObjects,Fcb,Ccb);
if(!NT_SUCCESS(Status))
{
try_return( Status );
}
}
}
if ((FileInformationClass == FileDispositionInformation) ||
(FileInformationClass == FileRenameInformation))
{
//互斥取得资源
if (!ExAcquireResourceExclusiveLite( volCtx->VolResource, BooleanFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT)))
{
Status = X70FsdPostRequest( Data,IrpContext);
NonCachedIoPending = TRUE;
IrpContext = NULL;
try_return( Status );
}
AcquireVolResource = TRUE;
}
if (!X70FsdAcquireExclusiveFcb( IrpContext, Fcb )) //
{
Status = X70FsdPostRequest( Data,IrpContext);
NonCachedIoPending = TRUE;
IrpContext = NULL;
try_return( Status );
}
FcbAcquired = TRUE;
ExAcquireResourceSharedLite(Fcb->EncryptResource,TRUE);
EncryptResourceAcquired = TRUE;
if(Ccb->StreamFileInfo.StreamObject == NULL)
{
try_return(Status = STATUS_FILE_DELETED);
}
//DbgPrint("收到SetInformation %ws \n",FileObject->FileName.Buffer);
switch(FileInformationClass)
{
case FileAllocationInformation:
{
Status = X70FsdCommonSetAllocationInfo(Data,FltObjects,IrpContext);
}
break;
case FileEndOfFileInformation:
{
Status = X70FsdCommonSetEndOfFileInfo(Data,FltObjects,IrpContext);
}
break;
case FileValidDataLengthInformation:
{
Status = X70FsdCommonSetValidDataLengthInfo(Data,FltObjects,IrpContext);
}
break;
case FilePositionInformation:
{
Status = X70FsdCommonFilePositionInfo(Data,FltObjects,IrpContext);
}
break;
case FileRenameInformation:
{
Status = X70FsdCommonRenameInfo(Data,FltObjects,IrpContext);
}
break;
case FileDispositionInformation:
{
PFILE_DISPOSITION_INFORMATION fdi;
fdi =(PFILE_DISPOSITION_INFORMATION)InfoBuffer;
if(fdi->DeleteFile )
{
if (!MmFlushImageSection( &Fcb->SectionObjectPointers,
MmFlushForDelete ))
{
Status = STATUS_CANNOT_DELETE;
break;
}
SetFlag( Fcb->FcbState, SCB_STATE_DELETE_ON_CLOSE );
FileObject->DeletePending = TRUE;
Delete = TRUE;
}
else
{
ClearFlag( Fcb->FcbState, SCB_STATE_DELETE_ON_CLOSE );
FileObject->DeletePending = FALSE;
}
}
default:
{
//DbgPrint("收到请求 %d \n",FileInformationClass);
Status = FltAllocateCallbackData(FltObjects->Instance,Ccb->StreamFileInfo.StreamObject,&RetNewCallbackData);
if(NT_SUCCESS(Status))
{
RtlCopyMemory(RetNewCallbackData->Iopb,Data->Iopb,sizeof(FLT_IO_PARAMETER_BLOCK));
ClearFlag(RetNewCallbackData->Iopb->IrpFlags,IRP_PAGING_IO);
RetNewCallbackData->Iopb->TargetFileObject = Ccb->StreamFileInfo.StreamObject;
if(IsMyFakeFcb(RetNewCallbackData->Iopb->Parameters.SetFileInformation.ParentOfTarget )) //如果是一个我们的对象换掉他
{
TargetCcb = RetNewCallbackData->Iopb->Parameters.SetFileInformation.ParentOfTarget->FsContext2;
if(TargetCcb != NULL)
{
RetNewCallbackData->Iopb->Parameters.SetFileInformation.ParentOfTarget = TargetCcb->StreamFileInfo.StreamObject;
}
else
{
try_return(Status = STATUS_ACCESS_DENIED;);
}
}
FltPerformSynchronousIo(RetNewCallbackData);
Data->IoStatus = RetNewCallbackData->IoStatus;
Status = RetNewCallbackData->IoStatus.Status;