Ejemplo n.º 1
0
NTSTATUS
NdasFatSecondaryQueryDirectory (
    IN PIRP_CONTEXT IrpContext,
    IN PIRP Irp
    )

/*++

Routine Description:

    This routine performs the query directory operation.  It is responsible
    for either completing of enqueuing the input Irp.

Arguments:

    Irp - Supplies the Irp to process

Return Value:

    NTSTATUS - The return status for the operation

--*/

{
    NTSTATUS Status;
    PIO_STACK_LOCATION IrpSp;

    PVCB Vcb;
    PDCB Dcb;
    PCCB Ccb;
    PBCB Bcb;

    ULONG i;
    PUCHAR Buffer;
    CLONG UserBufferLength;

    PUNICODE_STRING UniArgFileName;
    WCHAR LongFileNameBuffer[ FAT_CREATE_INITIAL_NAME_BUF_SIZE];
    UNICODE_STRING LongFileName;
    FILE_INFORMATION_CLASS FileInformationClass;
    ULONG FileIndex;
    BOOLEAN RestartScan;
    BOOLEAN ReturnSingleEntry;
    BOOLEAN IndexSpecified;

    BOOLEAN InitialQuery;
    VBO CurrentVbo;
    BOOLEAN UpdateCcb;
    PDIRENT Dirent;
    UCHAR Fat8Dot3Buffer[12];
    OEM_STRING Fat8Dot3String;
    ULONG DiskAllocSize;

    ULONG NextEntry;
    ULONG LastEntry;

    PFILE_DIRECTORY_INFORMATION DirInfo;
    PFILE_FULL_DIR_INFORMATION FullDirInfo;
    PFILE_BOTH_DIR_INFORMATION BothDirInfo;
    PFILE_ID_FULL_DIR_INFORMATION IdFullDirInfo;
    PFILE_ID_BOTH_DIR_INFORMATION IdBothDirInfo;
    PFILE_NAMES_INFORMATION NamesInfo;

#if 1

	PVOLUME_DEVICE_OBJECT		volDo;
	BOOLEAN						secondarySessionResourceAcquired = FALSE;

	PSECONDARY_REQUEST			secondaryRequest = NULL;

	PNDFS_REQUEST_HEADER		ndfsRequestHeader;
	PNDFS_WINXP_REQUEST_HEADER	ndfsWinxpRequestHeader;
	PNDFS_WINXP_REPLY_HEADER	ndfsWinxpReplytHeader;
	_U8							*ndfsWinxpRequestData;

	LARGE_INTEGER				timeOut;

	struct QueryDirectory		queryDirectory;
	PVOID						inputBuffer;
	ULONG						inputBufferLength;

	ULONG						returnedDataSize;

#endif

    PAGED_CODE();

    //
    //  Get the current Stack location
    //

    IrpSp = IoGetCurrentIrpStackLocation( Irp );

    //
    //  Display the input values.
    //
    DebugTrace(+1, Dbg, "FatQueryDirectory...\n", 0);
    DebugTrace( 0, Dbg, " Wait                   = %08lx\n", FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT));
    DebugTrace( 0, Dbg, " Irp                    = %08lx\n", Irp);
    DebugTrace( 0, Dbg, " ->Length               = %08lx\n", IrpSp->Parameters.QueryDirectory.Length);
    DebugTrace( 0, Dbg, " ->FileName             = %08lx\n", IrpSp->Parameters.QueryDirectory.FileName);
    DebugTrace( 0, Dbg, " ->FileInformationClass = %08lx\n", IrpSp->Parameters.QueryDirectory.FileInformationClass);
    DebugTrace( 0, Dbg, " ->FileIndex            = %08lx\n", IrpSp->Parameters.QueryDirectory.FileIndex);
    DebugTrace( 0, Dbg, " ->UserBuffer           = %08lx\n", Irp->AssociatedIrp.SystemBuffer);
    DebugTrace( 0, Dbg, " ->RestartScan          = %08lx\n", FlagOn( IrpSp->Flags, SL_RESTART_SCAN ));
    DebugTrace( 0, Dbg, " ->ReturnSingleEntry    = %08lx\n", FlagOn( IrpSp->Flags, SL_RETURN_SINGLE_ENTRY ));
    DebugTrace( 0, Dbg, " ->IndexSpecified       = %08lx\n", FlagOn( IrpSp->Flags, SL_INDEX_SPECIFIED ));

    //
    //  Reference our input parameters to make things easier
    //

    UserBufferLength = IrpSp->Parameters.QueryDirectory.Length;

    FileInformationClass = IrpSp->Parameters.QueryDirectory.FileInformationClass;
    FileIndex = IrpSp->Parameters.QueryDirectory.FileIndex;

    UniArgFileName = (PUNICODE_STRING) IrpSp->Parameters.QueryDirectory.FileName;

    RestartScan       = BooleanFlagOn(IrpSp->Flags, SL_RESTART_SCAN);
    ReturnSingleEntry = BooleanFlagOn(IrpSp->Flags, SL_RETURN_SINGLE_ENTRY);
    IndexSpecified    = BooleanFlagOn(IrpSp->Flags, SL_INDEX_SPECIFIED);

    //
    //  Check on the type of open.  We return invalid parameter for all
    //  but UserDirectoryOpens.  Also check that the filename is a valid
    //  UNICODE string.
    //
    
    if (FatDecodeFileObject( IrpSp->FileObject,
                             &Vcb,
                             &Dcb,
                             &Ccb) != UserDirectoryOpen ||
        (UniArgFileName &&
         UniArgFileName->Length % sizeof(WCHAR))) {

        FatCompleteRequest( IrpContext, Irp, STATUS_INVALID_PARAMETER );
        DebugTrace(-1, Dbg, "FatQueryDirectory -> STATUS_INVALID_PARAMETER\n", 0);

        return STATUS_INVALID_PARAMETER;
    }

#if 1

	 if (FlagOn(Ccb->NdasFatFlags, ND_FAT_CCB_FLAG_UNOPENED)) {

		 ASSERT( FlagOn(Ccb->NdasFatFlags, ND_FAT_CCB_FLAG_CORRUPTED) );

		 FatCompleteRequest( IrpContext, Irp, STATUS_FILE_CORRUPT_ERROR );

		 DebugTrace2( -1, Dbg, ("NtfsCommonDirectoryControl -> STATUS_FILE_CORRUPT_ERROR\n") );
		 return STATUS_FILE_CORRUPT_ERROR;
	 }

#endif


    //
    //  Initialize the local variables.
    //

    Bcb = NULL;
    UpdateCcb = TRUE;
    Dirent = NULL;

    Fat8Dot3String.MaximumLength = 12;
    Fat8Dot3String.Buffer = Fat8Dot3Buffer;

    LongFileName.Length = 0;
    LongFileName.MaximumLength = sizeof( LongFileNameBuffer);
    LongFileName.Buffer = LongFileNameBuffer;

    InitialQuery = (BOOLEAN)((Ccb->UnicodeQueryTemplate.Buffer == NULL) &&
                             !FlagOn(Ccb->Flags, CCB_FLAG_MATCH_ALL));
    Status = STATUS_SUCCESS;
    Irp->IoStatus.Information = 0;

    DiskAllocSize = 1 << Vcb->AllocationSupport.LogOfBytesPerCluster;

    //
    //  If this is the initial query, then grab exclusive access in
    //  order to update the search string in the Ccb.  We may
    //  discover that we are not the initial query once we grab the Fcb
    //  and downgrade our status.
    //

    if (InitialQuery) {

        if (!FatAcquireExclusiveFcb( IrpContext, Dcb )) {

            DebugTrace(0, Dbg, "FatQueryDirectory -> Enqueue to Fsp\n", 0);
            Status = FatFsdPostRequest( IrpContext, Irp );
            DebugTrace(-1, Dbg, "FatQueryDirectory -> %08lx\n", Status);

            return Status;
        }

        if (Ccb->UnicodeQueryTemplate.Buffer != NULL) {

            InitialQuery = FALSE;

            FatConvertToSharedFcb( IrpContext, Dcb );
        }

    } else {

        if (!FatAcquireSharedFcb( IrpContext, Dcb )) {

            DebugTrace(0, Dbg, "FatQueryDirectory -> Enqueue to Fsp\n", 0);
            Status = FatFsdPostRequest( IrpContext, Irp );
            DebugTrace(-1, Dbg, "FatQueryDirectory -> %08lx\n", Status);

            return Status;

        }
    }

    try {

        ULONG BaseLength;
        ULONG BytesConverted;

        //
        // If we are in the Fsp now because we had to wait earlier,
        // we must map the user buffer, otherwise we can use the
        // user's buffer directly.
        //

        Buffer = FatMapUserBuffer( IrpContext, Irp );

#if 1

		volDo = CONTAINING_RECORD( Vcb, VOLUME_DEVICE_OBJECT, Vcb );

		secondarySessionResourceAcquired 
			= SecondaryAcquireResourceExclusiveLite( IrpContext, 
													 &volDo->SessionResource, 
													 BooleanFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) );

		
		if (FlagOn(volDo->Secondary->Thread.Flags, SECONDARY_THREAD_FLAG_REMOTE_DISCONNECTED)) {

			NDASFAT_ASSERT( FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) );
			SetFlag( IrpContext->NdasFatFlags, NDAS_FAT_IRP_CONTEXT_FLAG_DONT_POST_REQUEST );
			FatRaiseStatus( IrpContext, STATUS_CANT_WAIT );
		}

		queryDirectory.FileIndex			= IrpSp->Parameters.QueryDirectory.FileIndex;
		queryDirectory.FileInformationClass = IrpSp->Parameters.QueryDirectory.FileInformationClass;
		queryDirectory.FileName				= IrpSp->Parameters.QueryDirectory.FileName;
		queryDirectory.Length				= IrpSp->Parameters.QueryDirectory.Length;

		inputBuffer			= (queryDirectory.FileName) ? (queryDirectory.FileName->Buffer) : NULL;
		inputBufferLength	= (queryDirectory.FileName) ? (queryDirectory.FileName->Length) : 0;

		if (queryDirectory.FileName) {

			DebugTrace2( 0, Dbg, ("NdNtfsSecondaryQueryDirectory: queryFileName = %wZ\n", queryDirectory.FileName) );
		}

		ASSERT( inputBufferLength <= volDo->Secondary->Thread.SessionContext.PrimaryMaxDataSize );
		ASSERT( UserBufferLength <= volDo->Secondary->Thread.SessionContext.SecondaryMaxDataSize );

		secondaryRequest = AllocateWinxpSecondaryRequest( volDo->Secondary, 
														  IRP_MJ_DIRECTORY_CONTROL,
														  ((inputBufferLength > UserBufferLength) ? inputBufferLength : UserBufferLength) );

		if (secondaryRequest == NULL) {

			try_return( Status = STATUS_INSUFFICIENT_RESOURCES );
		}

		ndfsRequestHeader = &secondaryRequest->NdfsRequestHeader;
		INITIALIZE_NDFS_REQUEST_HEADER(	ndfsRequestHeader, 
										NDFS_COMMAND_EXECUTE, 
										volDo->Secondary, 
										IRP_MJ_DIRECTORY_CONTROL, 
										inputBufferLength );

		ndfsWinxpRequestHeader = (PNDFS_WINXP_REQUEST_HEADER)(ndfsRequestHeader+1);
		ASSERT( ndfsWinxpRequestHeader == (PNDFS_WINXP_REQUEST_HEADER)secondaryRequest->NdfsRequestData );
		INITIALIZE_NDFS_WINXP_REQUEST_HEADER( ndfsWinxpRequestHeader, Irp, IrpSp, Ccb->PrimaryFileHandle );

		ndfsWinxpRequestHeader->QueryDirectory.Length				= UserBufferLength;
		ndfsWinxpRequestHeader->QueryDirectory.FileInformationClass	= queryDirectory.FileInformationClass;
		ndfsWinxpRequestHeader->QueryDirectory.FileIndex			= queryDirectory.FileIndex;

		ndfsWinxpRequestData = (_U8 *)(ndfsWinxpRequestHeader+1);
		if (inputBufferLength)
			RtlCopyMemory( ndfsWinxpRequestData, inputBuffer, inputBufferLength );

		secondaryRequest->RequestType = SECONDARY_REQ_SEND_MESSAGE;
		QueueingSecondaryRequest( volDo->Secondary, secondaryRequest );

		timeOut.QuadPart = -NDASFAT_TIME_OUT;		
		Status = KeWaitForSingleObject( &secondaryRequest->CompleteEvent, Executive, KernelMode, FALSE, &timeOut );
		
		KeClearEvent( &secondaryRequest->CompleteEvent );

		if (Status != STATUS_SUCCESS) {

			secondaryRequest = NULL;
			try_return( Status = STATUS_IO_DEVICE_ERROR );
		}

		SecondaryReleaseResourceLite( IrpContext, &volDo->SessionResource );		
		secondarySessionResourceAcquired = FALSE;

		if (secondaryRequest->ExecuteStatus != STATUS_SUCCESS) {

			if (IrpContext->OriginatingIrp)
				PrintIrp( Dbg2, "secondaryRequest->ExecuteStatus != STATUS_SUCCESS", NULL, IrpContext->OriginatingIrp );
			DebugTrace2( 0, Dbg2, ("secondaryRequest->ExecuteStatus != STATUS_SUCCESS file = %s, line = %d\n", __FILE__, __LINE__) );

			NDASFAT_ASSERT( FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) );
			SetFlag( IrpContext->NdasFatFlags, NDAS_FAT_IRP_CONTEXT_FLAG_DONT_POST_REQUEST );
			FatRaiseStatus( IrpContext, STATUS_CANT_WAIT );
		}

		ndfsWinxpReplytHeader = (PNDFS_WINXP_REPLY_HEADER)secondaryRequest->NdfsReplyData;
		Status = Irp->IoStatus.Status = ndfsWinxpReplytHeader->Status;
		Irp->IoStatus.Information = ndfsWinxpReplytHeader->Information;
		
		returnedDataSize = secondaryRequest->NdfsReplyHeader.MessageSize - sizeof(NDFS_REPLY_HEADER) - sizeof(NDFS_WINXP_REPLY_HEADER);

		if (returnedDataSize) {

			ASSERT( ndfsWinxpReplytHeader->Information != 0 );
			ASSERT(returnedDataSize <= ADD_ALIGN8(queryDirectory.Length));
			ASSERT( Buffer );

			RtlCopyMemory( Buffer,
						   (_U8 *)(ndfsWinxpReplytHeader+1),
						   (returnedDataSize < queryDirectory.Length) ? returnedDataSize : queryDirectory.Length );
		}

#endif

#if 0

        //
        //  Make sure the Dcb is still good.
        //

        FatVerifyFcb( IrpContext, Dcb );

        //
        //  Determine where to start the scan.  Highest priority is given
        //  to the file index.  Lower priority is the restart flag.  If
        //  neither of these is specified, then the Vbo offset field in the
        //  Ccb is used.
        //

        if (IndexSpecified) {

            CurrentVbo = FileIndex + sizeof( DIRENT );

        } else if (RestartScan) {

            CurrentVbo = 0;

        } else {

            CurrentVbo = Ccb->OffsetToStartSearchFrom;

        }

        //
        //  If this is the first try then allocate a buffer for the file
        //  name.
        //

        if (InitialQuery) {

            //
            //  If either:
            //
            //  - No name was specified
            //  - An empty name was specified
            //  - We received a '*'
            //  - The user specified the DOS equivolent of ????????.???
            //
            //  then match all names.
            //

            if ((UniArgFileName == NULL) ||
                (UniArgFileName->Length == 0) ||
                (UniArgFileName->Buffer == NULL) ||
                ((UniArgFileName->Length == sizeof(WCHAR)) &&
                 (UniArgFileName->Buffer[0] == L'*')) ||
                ((UniArgFileName->Length == 12*sizeof(WCHAR)) &&
                 (RtlEqualMemory( UniArgFileName->Buffer,
                                  Fat8QMdot3QM,
                                  12*sizeof(WCHAR) )))) {

                Ccb->ContainsWildCards = TRUE;

                SetFlag( Ccb->Flags, CCB_FLAG_MATCH_ALL );

            } else {

                BOOLEAN ExtendedName = FALSE;
                OEM_STRING LocalBestFit;

                //
                //  First and formost, see if the name has wild cards.
                //

                Ccb->ContainsWildCards =
                    FsRtlDoesNameContainWildCards( UniArgFileName );

                //
                //  Now check to see if the name contains any extended
                //  characters
                //

                for (i=0; i < UniArgFileName->Length / sizeof(WCHAR); i++) {

                    if (UniArgFileName->Buffer[i] >= 0x80) {

                        ExtendedName = TRUE;
                        break;
                    }
                }

                //
                //  OK, now do the conversions we need.
                //

                if (ExtendedName) {

                    Status = RtlUpcaseUnicodeString( &Ccb->UnicodeQueryTemplate,
                                                     UniArgFileName,
                                                     TRUE );

                    if (!NT_SUCCESS(Status)) {

                        try_return( Status );
                    }

                    SetFlag( Ccb->Flags, CCB_FLAG_FREE_UNICODE );

                    //
                    //  Upcase the name and convert it to the Oem code page.
                    //

                    Status = RtlUpcaseUnicodeStringToCountedOemString( &LocalBestFit,
                                                                       UniArgFileName,
                                                                       TRUE );

                    //
                    //  If this conversion failed for any reason other than
                    //  an unmappable character fail the request.
                    //

                    if (!NT_SUCCESS(Status)) {

                        if (Status == STATUS_UNMAPPABLE_CHARACTER) {

                            SetFlag( Ccb->Flags, CCB_FLAG_SKIP_SHORT_NAME_COMPARE );

                        } else {

                            try_return( Status );
                        }

                    } else {

                        SetFlag( Ccb->Flags, CCB_FLAG_FREE_OEM_BEST_FIT );
                    }

                } else {

                    PVOID Buffers;

                    //
                    //  This case is optimized because I know I only have to
                    //  worry about a-z.
                    //

                    Buffers = FsRtlAllocatePoolWithTag( PagedPool,
                                                        UniArgFileName->Length +
                                                        UniArgFileName->Length / sizeof(WCHAR),
                                                        TAG_FILENAME_BUFFER );

                    Ccb->UnicodeQueryTemplate.Buffer = Buffers;
                    Ccb->UnicodeQueryTemplate.Length = UniArgFileName->Length;
                    Ccb->UnicodeQueryTemplate.MaximumLength = UniArgFileName->Length;

                    LocalBestFit.Buffer = (PUCHAR)Buffers + UniArgFileName->Length;
                    LocalBestFit.Length = UniArgFileName->Length / sizeof(WCHAR);
                    LocalBestFit.MaximumLength = LocalBestFit.Length;

                    SetFlag( Ccb->Flags, CCB_FLAG_FREE_UNICODE );

                    for (i=0; i < UniArgFileName->Length / sizeof(WCHAR); i++) {

                        WCHAR c = UniArgFileName->Buffer[i];

                        LocalBestFit.Buffer[i] = (UCHAR)
                        (Ccb->UnicodeQueryTemplate.Buffer[i] =
                             (c < 'a' ? c : c <= 'z' ? c - ('a' - 'A') : c));
                    }
                }

                //
                //  At this point we now have the upcased unicode name,
                //  and the two Oem names if they could be represented in
                //  this code page.
                //
                //  Now determine if the Oem names are legal for what we
                //  going to try and do.  Mark them as not usable is they
                //  are not legal.  Note that we can optimize extended names
                //  since they are actually both the same string.
                //

                if (!FlagOn( Ccb->Flags, CCB_FLAG_SKIP_SHORT_NAME_COMPARE ) &&
                    !FatIsNameShortOemValid( IrpContext,
                                             LocalBestFit,
                                             Ccb->ContainsWildCards,
                                             FALSE,
                                             FALSE )) {

                    if (ExtendedName) {

                        RtlFreeOemString( &LocalBestFit );
                        ClearFlag( Ccb->Flags, CCB_FLAG_FREE_OEM_BEST_FIT );
                    }

                    SetFlag( Ccb->Flags, CCB_FLAG_SKIP_SHORT_NAME_COMPARE );
                }

                //
                //  OK, now both locals oem strings correctly reflect their
                //  usability.  Now we want to load up the Ccb structure.
                //
                //  Now we will branch on two paths of wheather the name
                //  is wild or not.
                //

                if (!FlagOn( Ccb->Flags, CCB_FLAG_SKIP_SHORT_NAME_COMPARE )) {

                    if (Ccb->ContainsWildCards) {

                        Ccb->OemQueryTemplate.Wild = LocalBestFit;

                    } else {

                        FatStringTo8dot3( IrpContext,
                                          LocalBestFit,
                                          &Ccb->OemQueryTemplate.Constant );

                        if (FlagOn(Ccb->Flags, CCB_FLAG_FREE_OEM_BEST_FIT)) {

                            RtlFreeOemString( &LocalBestFit );
                            ClearFlag( Ccb->Flags, CCB_FLAG_FREE_OEM_BEST_FIT );
                        }
                    }
                }
            }

            //
            //  We convert to shared access.
            //

            FatConvertToSharedFcb( IrpContext, Dcb );
        }

        LastEntry = 0;
        NextEntry = 0;

        switch (FileInformationClass) {

        case FileDirectoryInformation:

            BaseLength = FIELD_OFFSET( FILE_DIRECTORY_INFORMATION,
                                       FileName[0] );
            break;

        case FileFullDirectoryInformation:

            BaseLength = FIELD_OFFSET( FILE_FULL_DIR_INFORMATION,
                                       FileName[0] );
            break;

        case FileIdFullDirectoryInformation:

            BaseLength = FIELD_OFFSET( FILE_ID_FULL_DIR_INFORMATION,
                                       FileName[0] );
            break;

        case FileNamesInformation:

            BaseLength = FIELD_OFFSET( FILE_NAMES_INFORMATION,
                                       FileName[0] );
            break;

        case FileBothDirectoryInformation:

            BaseLength = FIELD_OFFSET( FILE_BOTH_DIR_INFORMATION,
                                       FileName[0] );
            break;

        case FileIdBothDirectoryInformation:

            BaseLength = FIELD_OFFSET( FILE_ID_BOTH_DIR_INFORMATION,
                                       FileName[0] );
            break;

        default:

            try_return( Status = STATUS_INVALID_INFO_CLASS );
        }

        //
        //  At this point we are about to enter our query loop.  We have
        //  determined the index into the directory file to begin the
        //  search.  LastEntry and NextEntry are used to index into the user
        //  buffer.  LastEntry is the last entry we've added, NextEntry is
        //  current one we're working on.  If NextEntry is non-zero, then
        //  at least one entry was added.
        //

        while ( TRUE ) {

            VBO NextVbo;
            ULONG FileNameLength;
            ULONG BytesRemainingInBuffer;


            DebugTrace(0, Dbg, "FatQueryDirectory -> Top of loop\n", 0);

            //
            //  If the user had requested only a single match and we have
            //  returned that, then we stop at this point.
            //

            if (ReturnSingleEntry && NextEntry != 0) {

                try_return( Status );
            }

            //
            //  We call FatLocateDirent to lock down the next matching dirent.
            //

            FatLocateDirent( IrpContext,
                             Dcb,
                             Ccb,
                             CurrentVbo,
                             &Dirent,
                             &Bcb,
                             &NextVbo,
                             NULL,
                             &LongFileName);

            //
            //  If we didn't receive a dirent, then we are at the end of the
            //  directory.  If we have returned any files, we exit with
            //  success, otherwise we return STATUS_NO_MORE_FILES.
            //

            if (!Dirent) {

                DebugTrace(0, Dbg, "FatQueryDirectory -> No dirent\n", 0);

                if (NextEntry == 0) {

                    UpdateCcb = FALSE;

                    if (InitialQuery) {

                        Status = STATUS_NO_SUCH_FILE;

                    } else {

                        Status = STATUS_NO_MORE_FILES;
                    }
                }

                try_return( Status );
            }

            //
            //  Protect access to the user buffer with an exception handler.
            //  Since (at our request) IO doesn't buffer these requests, we have
            //  to guard against a user messing with the page protection and other
            //  such trickery.
            //
            
            try {
                
                if (LongFileName.Length == 0) {

                    //
                    //  Now we have an entry to return to our caller.  We'll convert
                    //  the name from the form in the dirent to a <name>.<ext> form.
                    //  We'll case on the type of information requested and fill up
                    //  the user buffer if everything fits.
                    //

                    Fat8dot3ToString( IrpContext, Dirent, TRUE, &Fat8Dot3String );
    
                    //
                    //  Determine the UNICODE length of the file name.
                    //
    
                    FileNameLength = RtlOemStringToCountedUnicodeSize(&Fat8Dot3String);

                    //
                    //  Here are the rules concerning filling up the buffer:
                    //
                    //  1.  The Io system garentees that there will always be
                    //      enough room for at least one base record.
                    //
                    //  2.  If the full first record (including file name) cannot
                    //      fit, as much of the name as possible is copied and
                    //      STATUS_BUFFER_OVERFLOW is returned.
                    //
                    //  3.  If a subsequent record cannot completely fit into the
                    //      buffer, none of it (as in 0 bytes) is copied, and
                    //      STATUS_SUCCESS is returned.  A subsequent query will
                    //      pick up with this record.
                    //
    
                    BytesRemainingInBuffer = UserBufferLength - NextEntry;
    
                    if ( (NextEntry != 0) &&
                         ( (BaseLength + FileNameLength > BytesRemainingInBuffer) ||
                           (UserBufferLength < NextEntry) ) ) {
    
                        DebugTrace(0, Dbg, "Next entry won't fit\n", 0);
    
                        try_return( Status = STATUS_SUCCESS );
                    }
    
                    ASSERT( BytesRemainingInBuffer >= BaseLength );

                    //
                    //  Zero the base part of the structure.
                    //

                    RtlZeroMemory( &Buffer[NextEntry], BaseLength );

                    switch ( FileInformationClass ) {
    
                    //
                    //  Now fill the base parts of the strucure that are applicable.
                    //
    
                    case FileBothDirectoryInformation:
                    case FileFullDirectoryInformation:
                    case FileIdBothDirectoryInformation:
                    case FileIdFullDirectoryInformation:

                        DebugTrace(0, Dbg, "FatQueryDirectory -> Getting file full directory information\n", 0);
    
                        //
                        //  Get the Ea file length.
                        //
    
                        FullDirInfo = (PFILE_FULL_DIR_INFORMATION)&Buffer[NextEntry];
    
                        //
                        //  If the EAs are corrupt, ignore the error.  We don't want
                        //  to abort the directory query.
                        //
    
                        try {
    
                            FatGetEaLength( IrpContext,
                                            Vcb,
                                            Dirent,
                                            &FullDirInfo->EaSize );
    
                        } except(EXCEPTION_EXECUTE_HANDLER) {
    
                              FatResetExceptionState( IrpContext );
                              FullDirInfo->EaSize = 0;
                        }
                        
                    case FileDirectoryInformation:
    
                        DirInfo = (PFILE_DIRECTORY_INFORMATION)&Buffer[NextEntry];
    
                        FatGetDirTimes( IrpContext, Dirent, DirInfo );
    
                        DirInfo->EndOfFile.QuadPart = Dirent->FileSize;
    
                        if (!FlagOn( Dirent->Attributes, FAT_DIRENT_ATTR_DIRECTORY )) {
    
                            DirInfo->AllocationSize.QuadPart =
                               (((Dirent->FileSize + DiskAllocSize - 1) / DiskAllocSize) *
                                DiskAllocSize );
                        }
    
                        DirInfo->FileAttributes = Dirent->Attributes != 0 ?
                                                  Dirent->Attributes :
                                                  FILE_ATTRIBUTE_NORMAL;
    
                        DirInfo->FileIndex = NextVbo;
    
                        DirInfo->FileNameLength = FileNameLength;
    
                        DebugTrace(0, Dbg, "FatQueryDirectory -> Name = \"%Z\"\n", &Fat8Dot3String);
    
                        break;
    
                    case FileNamesInformation:
    
                        DebugTrace(0, Dbg, "FatQueryDirectory -> Getting file names information\n", 0);
    
                        NamesInfo = (PFILE_NAMES_INFORMATION)&Buffer[NextEntry];
    
                        NamesInfo->FileIndex = NextVbo;
    
                        NamesInfo->FileNameLength = FileNameLength;
    
                        DebugTrace(0, Dbg, "FatQueryDirectory -> Name = \"%Z\"\n", &Fat8Dot3String );
    
                        break;
    
                    default:
    
                        FatBugCheck( FileInformationClass, 0, 0 );
                    }

                    BytesConverted = 0;
    
                    Status = RtlOemToUnicodeN( (PWCH)&Buffer[NextEntry + BaseLength],
                                               BytesRemainingInBuffer - BaseLength,
                                               &BytesConverted,
                                               Fat8Dot3String.Buffer,
                                               Fat8Dot3String.Length );
                    
                    //
                    //  Check for the case that a single entry doesn't fit.
                    //  This should only get this far on the first entry
                    //
    
                    if (BytesConverted < FileNameLength) {
    
                        ASSERT( NextEntry == 0 );
                        Status = STATUS_BUFFER_OVERFLOW;
                    }
    
                    //
                    //  Set up the previous next entry offset
                    //
    
                    *((PULONG)(&Buffer[LastEntry])) = NextEntry - LastEntry;
    
                    //
                    //  And indicate how much of the user buffer we have currently
                    //  used up.  We must compute this value before we long align
                    //  ourselves for the next entry
                    //
    
                    Irp->IoStatus.Information = QuadAlign( Irp->IoStatus.Information ) +
                                                BaseLength + BytesConverted;
    
                    //
                    //  If something happened with the conversion, bail here.
                    //
    
                    if ( !NT_SUCCESS( Status ) ) {
    
                        try_return( NOTHING );
                    }

                } else {

                    ULONG ShortNameLength;
    
                    FileNameLength = LongFileName.Length;
    
                    //
                    //  Here are the rules concerning filling up the buffer:
                    //
                    //  1.  The Io system garentees that there will always be
                    //      enough room for at least one base record.
                    //
                    //  2.  If the full first record (including file name) cannot
                    //      fit, as much of the name as possible is copied and
                    //      STATUS_BUFFER_OVERFLOW is returned.
                    //
                    //  3.  If a subsequent record cannot completely fit into the
                    //      buffer, none of it (as in 0 bytes) is copied, and
                    //      STATUS_SUCCESS is returned.  A subsequent query will
                    //      pick up with this record.
                    //
    
                    BytesRemainingInBuffer = UserBufferLength - NextEntry;
    
                    if ( (NextEntry != 0) &&
                         ( (BaseLength + FileNameLength > BytesRemainingInBuffer) ||
                           (UserBufferLength < NextEntry) ) ) {
    
                        DebugTrace(0, Dbg, "Next entry won't fit\n", 0);
    
                        try_return( Status = STATUS_SUCCESS );
                    }
    
                    ASSERT( BytesRemainingInBuffer >= BaseLength );
    
                    //
                    //  Zero the base part of the structure.
                    //

                    RtlZeroMemory( &Buffer[NextEntry], BaseLength );

                    switch ( FileInformationClass ) {
    
                    //
                    //  Now fill the base parts of the strucure that are applicable.
                    //
    
                    case FileBothDirectoryInformation:
                    case FileIdBothDirectoryInformation:
    
                        BothDirInfo = (PFILE_BOTH_DIR_INFORMATION)&Buffer[NextEntry];
    
                        //
                        //  Now we have an entry to return to our caller.  We'll convert
                        //  the name from the form in the dirent to a <name>.<ext> form.
                        //  We'll case on the type of information requested and fill up
                        //  the user buffer if everything fits.
                        //
    
                        Fat8dot3ToString( IrpContext, Dirent, FALSE, &Fat8Dot3String );
    
                        ASSERT( Fat8Dot3String.Length <= 12 );
    
                        Status = RtlOemToUnicodeN( &BothDirInfo->ShortName[0],
                                                   12*sizeof(WCHAR),
                                                   &ShortNameLength,
                                                   Fat8Dot3String.Buffer,
                                                   Fat8Dot3String.Length );
    
                        ASSERT( Status != STATUS_BUFFER_OVERFLOW );
                        ASSERT( ShortNameLength <= 12*sizeof(WCHAR) );
    
                        //
                        //  Copy the length into the dirinfo structure.  Note
                        //  that the LHS below is a USHORT, so it can not
                        //  be specificed as the OUT parameter above.
                        //
    
                        BothDirInfo->ShortNameLength = (UCHAR)ShortNameLength;
    
                        //
                        //  If something happened with the conversion, bail here.
                        //
    
                        if ( !NT_SUCCESS( Status ) ) {
    
                            try_return( NOTHING );
                        }
    
                    case FileFullDirectoryInformation:
                    case FileIdFullDirectoryInformation:
    
                        DebugTrace(0, Dbg, "FatQueryDirectory -> Getting file full directory information\n", 0);
    
                        //
                        //  Get the Ea file length.
                        //
    
                        FullDirInfo = (PFILE_FULL_DIR_INFORMATION)&Buffer[NextEntry];
    
                        //
                        //  If the EAs are corrupt, ignore the error.  We don't want
                        //  to abort the directory query.
                        //
    
                        try {
    
                            FatGetEaLength( IrpContext,
                                            Vcb,
                                            Dirent,
                                            &FullDirInfo->EaSize );
    
                        } except(EXCEPTION_EXECUTE_HANDLER) {
    
                              FatResetExceptionState( IrpContext );
                              FullDirInfo->EaSize = 0;
                        }
    
                    case FileDirectoryInformation:
    
                        DirInfo = (PFILE_DIRECTORY_INFORMATION)&Buffer[NextEntry];
    
                        FatGetDirTimes( IrpContext, Dirent, DirInfo );
    
                        DirInfo->EndOfFile.QuadPart = Dirent->FileSize;
    
                        if (!FlagOn( Dirent->Attributes, FAT_DIRENT_ATTR_DIRECTORY )) {
    
                            DirInfo->AllocationSize.QuadPart = (
                                                            (( Dirent->FileSize
                                                               + DiskAllocSize - 1 )
                                                             / DiskAllocSize )
                                                            * DiskAllocSize );
                        }
    
                        DirInfo->FileAttributes = Dirent->Attributes != 0 ?
                                                  Dirent->Attributes :
                                                  FILE_ATTRIBUTE_NORMAL;
    
                        DirInfo->FileIndex = NextVbo;
    
                        DirInfo->FileNameLength = FileNameLength;
    
                        DebugTrace(0, Dbg, "FatQueryDirectory -> Name = \"%Z\"\n", &Fat8Dot3String);
    
                        break;
    
                    case FileNamesInformation:
    
                        DebugTrace(0, Dbg, "FatQueryDirectory -> Getting file names information\n", 0);
    
                        NamesInfo = (PFILE_NAMES_INFORMATION)&Buffer[NextEntry];
    
                        NamesInfo->FileIndex = NextVbo;
    
                        NamesInfo->FileNameLength = FileNameLength;
    
                        DebugTrace(0, Dbg, "FatQueryDirectory -> Name = \"%Z\"\n", &Fat8Dot3String );
    
                        break;
    
                    default:
    
                        FatBugCheck( FileInformationClass, 0, 0 );
                    }

                    BytesConverted = BytesRemainingInBuffer - BaseLength >= FileNameLength ?
                                     FileNameLength :
                                     BytesRemainingInBuffer - BaseLength;
    
                    RtlCopyMemory( &Buffer[NextEntry + BaseLength],
                                   &LongFileName.Buffer[0],
                                   BytesConverted );
    
                    //
                    //  Set up the previous next entry offset
                    //
    
                    *((PULONG)(&Buffer[LastEntry])) = NextEntry - LastEntry;

                    //
                    //  And indicate how much of the user buffer we have currently
                    //  used up.  We must compute this value before we long align
                    //  ourselves for the next entry
                    //
    
                    Irp->IoStatus.Information = QuadAlign( Irp->IoStatus.Information ) +
                                                BaseLength + BytesConverted;

                    //
                    //  Check for the case that a single entry doesn't fit.
                    //  This should only get this far on the first entry.
                    //

                    if (BytesConverted < FileNameLength) {

                        ASSERT( NextEntry == 0 );

                        try_return( Status = STATUS_BUFFER_OVERFLOW );
                    }
                }

                //
                //  Finish up by filling in the FileId
                //

                switch ( FileInformationClass ) {

                case FileIdBothDirectoryInformation:

                    IdBothDirInfo = (PFILE_ID_BOTH_DIR_INFORMATION)&Buffer[NextEntry];
                    IdBothDirInfo->FileId.QuadPart = FatGenerateFileIdFromDirentAndOffset( Dcb, Dirent, NextVbo );
                    break;

                case FileIdFullDirectoryInformation:

                    IdFullDirInfo = (PFILE_ID_FULL_DIR_INFORMATION)&Buffer[NextEntry];
                    IdFullDirInfo->FileId.QuadPart = FatGenerateFileIdFromDirentAndOffset( Dcb, Dirent, NextVbo );
                    break;

                default:
                    break;
                }
            
            }  except (EXCEPTION_EXECUTE_HANDLER) {

                  //
                  //  We had a problem filling in the user's buffer, so stop and
                  //  fail this request.  This is the only reason any exception
                  //  would have occured at this level.
                  //
                  
                  Irp->IoStatus.Information = 0;
                  UpdateCcb = FALSE;
                  try_return( Status = GetExceptionCode());
            }

            //
            //  Set ourselves up for the next iteration
            //

            LastEntry = NextEntry;
            NextEntry += (ULONG)QuadAlign(BaseLength + BytesConverted);

            CurrentVbo = NextVbo + sizeof( DIRENT );
        }

#endif

    try_exit: NOTHING;
    } finally {
Ejemplo n.º 2
0
NTSTATUS
NdFatCommonFlushBuffers (
    IN PIRP_CONTEXT IrpContext,
    IN PIRP Irp
    )

/*++

Routine Description:

    This is the common routine for flushing a buffer.

Arguments:

    Irp - Supplies the Irp to process

Return Value:

    NTSTATUS - The return status for the operation

--*/

{
    NTSTATUS Status;

    PIO_STACK_LOCATION IrpSp;

    PFILE_OBJECT FileObject;

    TYPE_OF_OPEN TypeOfOpen;
    PVCB Vcb;
    PFCB Fcb;
    PCCB Ccb;

    BOOLEAN VcbAcquired = FALSE;
    BOOLEAN FcbAcquired = FALSE;

    PDIRENT Dirent;
    PBCB DirentBcb = NULL;

	PVOLUME_DEVICE_OBJECT		volDo = CONTAINING_RECORD( IrpContext->Vcb, VOLUME_DEVICE_OBJECT, Vcb );
	BOOLEAN						secondarySessionResourceAcquired = FALSE;

	PSECONDARY_REQUEST			secondaryRequest = NULL;

	PNDFS_REQUEST_HEADER		ndfsRequestHeader;
	PNDFS_WINXP_REQUEST_HEADER	ndfsWinxpRequestHeader;
	PNDFS_WINXP_REPLY_HEADER	ndfsWinxpReplytHeader;

	LARGE_INTEGER				timeOut;



    PAGED_CODE();

    IrpSp = IoGetCurrentIrpStackLocation( Irp );

    DebugTrace(+1, Dbg, "FatCommonFlushBuffers\n", 0);
    DebugTrace( 0, Dbg, "Irp           = %08lx\n", Irp);
    DebugTrace( 0, Dbg, "->FileObject  = %08lx\n", IrpSp->FileObject);

	
	//
    //  Extract and decode the file object
    //

    FileObject = IrpSp->FileObject;
    TypeOfOpen = FatDecodeFileObject( FileObject, &Vcb, &Fcb, &Ccb );

    //
    //  CcFlushCache is always synchronous, so if we can't wait enqueue
    //  the irp to the Fsp.
    //

    if ( !FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) ) {

        Status = FatFsdPostRequest( IrpContext, Irp );

        DebugTrace(-1, Dbg, "FatCommonFlushBuffers -> %08lx\n", Status );
        return Status;
    }

    Status = STATUS_SUCCESS;

    try {

		if (!FlagOn(Ccb->NdFatFlags, ND_FAT_CCB_FLAG_UNOPENED)) {

			do {
			
				secondarySessionResourceAcquired 
					= SecondaryAcquireResourceExclusiveLite( IrpContext, 
															 &volDo->Secondary->SessionResource, 
															 BooleanFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) );

				if (FlagOn(volDo->Secondary->Thread.Flags, SECONDARY_THREAD_FLAG_REMOTE_DISCONNECTED) ) {

					PrintIrp( Dbg2, "SECONDARY_THREAD_FLAG_REMOTE_DISCONNECTED", NULL, IrpContext->OriginatingIrp );
					FatRaiseStatus( IrpContext, STATUS_CANT_WAIT );	
				}

				secondaryRequest = ALLOC_WINXP_SECONDARY_REQUEST( volDo->Secondary, IRP_MJ_FLUSH_BUFFERS, 0 );

				if (secondaryRequest == NULL) {
	
					Status = STATUS_INSUFFICIENT_RESOURCES;
					break;
				}

				ndfsRequestHeader = &secondaryRequest->NdfsRequestHeader;

				INITIALIZE_NDFS_REQUEST_HEADER( ndfsRequestHeader, NDFS_COMMAND_EXECUTE, volDo->Secondary, IRP_MJ_FLUSH_BUFFERS, 0 );

				ndfsWinxpRequestHeader = (PNDFS_WINXP_REQUEST_HEADER)(ndfsRequestHeader+1);
				ASSERT( ndfsWinxpRequestHeader == (PNDFS_WINXP_REQUEST_HEADER)secondaryRequest->NdfsRequestData );

				INITIALIZE_NDFS_WINXP_REQUEST_HEADER( ndfsWinxpRequestHeader, 
													  IrpContext->OriginatingIrp, 
													  IoGetCurrentIrpStackLocation(IrpContext->OriginatingIrp), 
													  Ccb->PrimaryFileHandle );
				
				ASSERT( !ExIsResourceAcquiredSharedLite(&IrpContext->Vcb->Resource) );	

				secondaryRequest->RequestType = SECONDARY_REQ_SEND_MESSAGE;
				QueueingSecondaryRequest( volDo->Secondary, secondaryRequest );

				timeOut.QuadPart = -NDFAT_TIME_OUT;		
				Status = KeWaitForSingleObject( &secondaryRequest->CompleteEvent, Executive, KernelMode, FALSE, &timeOut );
			
				if (Status != STATUS_SUCCESS) {

					ASSERT( NDFAT_BUG );
					break;
				}

				KeClearEvent (&secondaryRequest->CompleteEvent);

				if (BooleanFlagOn(volDo->Secondary->Thread.Flags, SECONDARY_THREAD_FLAG_REMOTE_DISCONNECTED)) {

					FatRaiseStatus( IrpContext, STATUS_CANT_WAIT );
				}

				if (secondaryRequest->ExecuteStatus == STATUS_SUCCESS) {

					ndfsWinxpReplytHeader = (PNDFS_WINXP_REPLY_HEADER)secondaryRequest->NdfsReplyData;
					ASSERT(ndfsWinxpReplytHeader->Status == STATUS_SUCCESS);
				}

				if (secondaryRequest) {

					DereferenceSecondaryRequest( secondaryRequest );
					secondaryRequest = NULL;
				}

				if ( secondarySessionResourceAcquired == TRUE ) {
					
					SecondaryReleaseResourceLite( IrpContext, &volDo->Secondary->SessionResource );		
					secondarySessionResourceAcquired = FALSE;
				}

				break;

			} while(0);
		} 

		Status = STATUS_SUCCESS;

        //
        //  Case on the type of open that we are trying to flush
        //

        switch (TypeOfOpen) {

        case VirtualVolumeFile:
        case EaFile:
        case DirectoryFile:

            DebugTrace(0, Dbg, "Flush that does nothing\n", 0);
            break;

        case UserFileOpen:

            DebugTrace(0, Dbg, "Flush User File Open\n", 0);

            (VOID)FatAcquireExclusiveFcb( IrpContext, Fcb );

            FcbAcquired = TRUE;

            FatVerifyFcb( IrpContext, Fcb );

            //
            //  If the file is cached then flush its cache
            //

            Status = FatFlushFile( IrpContext, Fcb, Flush );

            //
            //  Also update and flush the file's dirent in the parent directory if the
            //  file flush worked.
            //

            if (NT_SUCCESS( Status )) {

                //
                //  Insure that we get the filesize to disk correctly.  This is
                //  benign if it was already good.
                //
                //  (why do we need to do this?)
                //

                SetFlag(FileObject->Flags, FO_FILE_SIZE_CHANGED);
#if 0
                FatUpdateDirentFromFcb( IrpContext, FileObject, Fcb, Ccb );
#endif                
                //
                //  Flush the volume file to get any allocation information
                //  updates to disk.
                //

                if (FlagOn(Fcb->FcbState, FCB_STATE_FLUSH_FAT)) {

                    Status = FatFlushFat( IrpContext, Vcb );

                    ClearFlag(Fcb->FcbState, FCB_STATE_FLUSH_FAT);
                }

                //
                //  Set the write through bit so that these modifications
                //  will be completed with the request.
                //

                SetFlag(IrpContext->Flags, IRP_CONTEXT_FLAG_WRITE_THROUGH);
            }

            break;

        case UserDirectoryOpen:

            //
            //  If the user had opened the root directory then we'll
            //  oblige by flushing the volume.
            //

            if (NodeType(Fcb) != FAT_NTC_ROOT_DCB) {

                DebugTrace(0, Dbg, "Flush a directory does nothing\n", 0);
                break;
            }

        case UserVolumeOpen:

            DebugTrace(0, Dbg, "Flush User Volume Open, or root dcb\n", 0);

            //
            //  Acquire exclusive access to the Vcb.
            //

            {
                BOOLEAN Finished;
                Finished = FatAcquireExclusiveSecondaryVcb( IrpContext, Vcb );
                ASSERT( Finished );
            }

            VcbAcquired = TRUE;

            //
            //  Mark the volume clean and then flush the volume file,
            //  and then all directories
            //

            Status = FatFlushVolume( IrpContext, Vcb, Flush );

            //
            //  If the volume was dirty, do the processing that the delayed
            //  callback would have done.
            //

            if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_VOLUME_DIRTY)) {

                //
                //  Cancel any pending clean volumes.
                //

                (VOID)KeCancelTimer( &Vcb->CleanVolumeTimer );
                (VOID)KeRemoveQueueDpc( &Vcb->CleanVolumeDpc );

                //
                //  The volume is now clean, note it.
                //

                if (!FlagOn(Vcb->VcbState, VCB_STATE_FLAG_MOUNTED_DIRTY)) {

                    FatMarkVolume( IrpContext, Vcb, VolumeClean );
                    ClearFlag( Vcb->VcbState, VCB_STATE_FLAG_VOLUME_DIRTY );
                }

                //
                //  Unlock the volume if it is removable.
                //

                if (FlagOn(Vcb->VcbState, VCB_STATE_FLAG_REMOVABLE_MEDIA) &&
                    !FlagOn(Vcb->VcbState, VCB_STATE_FLAG_BOOT_OR_PAGING_FILE)) {

                    FatToggleMediaEjectDisable( IrpContext, Vcb, FALSE );
                }
            }

            break;

        default:

            FatBugCheck( TypeOfOpen, 0, 0 );
        }

        FatUnpinBcb( IrpContext, DirentBcb );

        FatUnpinRepinnedBcbs( IrpContext );

    } finally {

        DebugUnwind( FatCommonFlushBuffers );

		if (secondaryRequest)
			DereferenceSecondaryRequest( secondaryRequest );

		if (secondarySessionResourceAcquired) {

			SecondaryReleaseResourceLite( IrpContext, &volDo->Secondary->SessionResource );		
		}

        FatUnpinBcb( IrpContext, DirentBcb );

        if (VcbAcquired) { FatReleaseSecondaryVcb( IrpContext, Vcb ); }

        if (FcbAcquired) { FatReleaseFcb( IrpContext, Fcb ); }

        //
        //  If this is a normal termination then pass the request on
        //  to the target device object.
        //

        if (!AbnormalTermination()) {

            NTSTATUS DriverStatus;
            PIO_STACK_LOCATION NextIrpSp;

            //
            //  Get the next stack location, and copy over the stack location
            //

            NextIrpSp = IoGetNextIrpStackLocation( Irp );

            *NextIrpSp = *IrpSp;

            //
            //  Set up the completion routine
            //

            IoSetCompletionRoutine( Irp,
                                    FatFlushCompletionRoutine,
                                    ULongToPtr( Status ),
                                    TRUE,
                                    TRUE,
                                    TRUE );

            //
            //  Send the request.
            //

            DriverStatus = IoCallDriver(Vcb->TargetDeviceObject, Irp);

            Status = (DriverStatus == STATUS_INVALID_DEVICE_REQUEST) ?
                     Status : DriverStatus;

            //
            //  Free the IrpContext and return to the caller.
            //

            FatCompleteRequest( IrpContext, FatNull, STATUS_SUCCESS );
        }

        DebugTrace(-1, Dbg, "FatCommonFlushBuffers -> %08lx\n", Status);
    }

    return Status;
}
Ejemplo n.º 3
0
NTSTATUS
NdFatSecondaryCommonWrite (
	IN PIRP_CONTEXT IrpContext,
	IN PIRP			Irp
	)
{
	NTSTATUS					status;

	PVOLUME_DEVICE_OBJECT		volDo = CONTAINING_RECORD( IrpContext->Vcb, VOLUME_DEVICE_OBJECT, Vcb );
	BOOLEAN						secondarySessionResourceAcquired = FALSE;
	
	PIO_STACK_LOCATION			irpSp = IoGetCurrentIrpStackLocation( Irp );
	PFILE_OBJECT				fileObject = irpSp->FileObject;

	struct Write				write;
	
	PSECONDARY_REQUEST			secondaryRequest = NULL;
	PNDFS_REQUEST_HEADER		ndfsRequestHeader;
	PNDFS_WINXP_REQUEST_HEADER	ndfsWinxpRequestHeader;
	PNDFS_WINXP_REPLY_HEADER	ndfsWinxpReplytHeader;

	LARGE_INTEGER				timeOut;

	TYPE_OF_OPEN				typeOfOpen;
	PVCB						vcb;
	PFCB						fcb;
	PCCB						ccb;
	BOOLEAN						fcbAcquired = FALSE;


	ASSERT( KeGetCurrentIrql() == PASSIVE_LEVEL );

	typeOfOpen = FatDecodeFileObject( fileObject, &vcb, &fcb, &ccb );

	ASSERT( typeOfOpen == UserFileOpen );

	if (FlagOn(ccb->NdFatFlags, ND_FAT_CCB_FLAG_UNOPENED)) {

		/*if (FlagOn( fcb->FcbState, FCB_STATE_FILE_DELETED )) {
	
			ASSERT( FALSE );
			FatRaiseStatus( IrpContext, STATUS_FILE_DELETED, NULL, NULL );
					
		} else */{
					
			ASSERT( FlagOn(ccb->NdFatFlags, ND_FAT_CCB_FLAG_CORRUPTED) );
			
			return STATUS_FILE_CORRUPT_ERROR;
		}
	}

	if (irpSp->Parameters.Write.ByteOffset.QuadPart == FILE_WRITE_TO_END_OF_FILE && 
		irpSp->Parameters.Write.ByteOffset.HighPart == -1) {

		write.ByteOffset = fcb->Header.FileSize;

	} else {

		write.ByteOffset = irpSp->Parameters.Write.ByteOffset;
	}

	write.Key		= 0;
	write.Length	= irpSp->Parameters.Write.Length;

	if (FlagOn(Irp->Flags, IRP_PAGING_IO)) {
		
		ASSERT( (write.ByteOffset.QuadPart + write.Length) <= 
				((fcb->Header.AllocationSize.QuadPart + PAGE_SIZE - 1) & ~((LONGLONG) (PAGE_SIZE-1))) );

		return STATUS_SUCCESS;
	}

	ASSERT( FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) ); 
	//ASSERT( !FlagOn( IrpContext->State, IRP_CONTEXT_STATE_LAZY_WRITE ) );

	if ( (write.ByteOffset.QuadPart + write.Length) <= fcb->Header.FileSize.LowPart) {

		return STATUS_SUCCESS;
	}

	if (!FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT)) {

		return STATUS_PENDING;

		ASSERT( FALSE );
		DebugTrace2( 0, Dbg, ("Can't wait in NdFatSecondaryCommonWrite\n") );

		status = FatFsdPostRequest( IrpContext, Irp );

		DebugTrace2( -1, Dbg2, ("NdFatSecondaryCommonWrite:  FatFsdPostRequest -> %08lx\n", status) );
		return status;
	}

		DebugTrace2( 0, Dbg, ("write.ByteOffset.QuadPart + write.Length > fcb->Header.AllocationSize.QuadPart = %d "
								 "ExIsResourceAcquiredSharedLite(fcb->Header.Resource) = %d\n",
							   ((write.ByteOffset.QuadPart + write.Length) > fcb->Header.AllocationSize.QuadPart),
							   ExIsResourceAcquiredSharedLite(fcb->Header.Resource)) );

	if ((write.ByteOffset.QuadPart + write.Length) > fcb->Header.AllocationSize.QuadPart) {

		FatAcquireExclusiveFcb( IrpContext, fcb );
		fcbAcquired = TRUE;
	
	} 	

	try {

		secondarySessionResourceAcquired 
			= SecondaryAcquireResourceExclusiveLite( IrpContext, 
													 &volDo->Secondary->SessionResource, 
													 BooleanFlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT) );

		if (FlagOn(volDo->Secondary->Thread.Flags, SECONDARY_THREAD_FLAG_REMOTE_DISCONNECTED) ) {

			PrintIrp( Dbg, "SECONDARY_THREAD_FLAG_REMOTE_DISCONNECTED", NULL, IrpContext->OriginatingIrp );
			FatRaiseStatus( IrpContext, STATUS_CANT_WAIT );	
		}


		secondaryRequest = ALLOC_WINXP_SECONDARY_REQUEST( volDo->Secondary, 
														  IRP_MJ_SET_INFORMATION,
														  volDo->Secondary->Thread.SessionContext.SecondaryMaxDataSize );

		if (secondaryRequest == NULL) {

			FatRaiseStatus( IrpContext, STATUS_INSUFFICIENT_RESOURCES );
		}

		ndfsRequestHeader = &secondaryRequest->NdfsRequestHeader;
		INITIALIZE_NDFS_REQUEST_HEADER(	ndfsRequestHeader, NDFS_COMMAND_EXECUTE, volDo->Secondary, IRP_MJ_SET_INFORMATION, 0 );

		ndfsWinxpRequestHeader = (PNDFS_WINXP_REQUEST_HEADER)(ndfsRequestHeader+1);
		ASSERT( ndfsWinxpRequestHeader == (PNDFS_WINXP_REQUEST_HEADER)secondaryRequest->NdfsRequestData );

		//ndfsWinxpRequestHeader->IrpTag   = (_U32)Irp;
		ndfsWinxpRequestHeader->IrpMajorFunction = IRP_MJ_SET_INFORMATION;
		ndfsWinxpRequestHeader->IrpMinorFunction = 0;

		ndfsWinxpRequestHeader->FileHandle = ccb->PrimaryFileHandle;

		ndfsWinxpRequestHeader->IrpFlags   = 0;
		ndfsWinxpRequestHeader->IrpSpFlags = 0;

		ndfsWinxpRequestHeader->SetFile.FileHandle				= 0;
		ndfsWinxpRequestHeader->SetFile.Length					= sizeof( FILE_END_OF_FILE_INFORMATION );
		ndfsWinxpRequestHeader->SetFile.FileInformationClass	= FileEndOfFileInformation;

		ndfsWinxpRequestHeader->SetFile.EndOfFileInformation.EndOfFile = write.ByteOffset.QuadPart + write.Length;


		secondaryRequest->RequestType = SECONDARY_REQ_SEND_MESSAGE;
		QueueingSecondaryRequest( volDo->Secondary, secondaryRequest );

		timeOut.QuadPart = -NDFAT_TIME_OUT;
		status = KeWaitForSingleObject( &secondaryRequest->CompleteEvent, Executive, KernelMode, FALSE, &timeOut );
		
		if (status != STATUS_SUCCESS) {

			secondaryRequest = NULL;
			status = STATUS_IO_DEVICE_ERROR;
			leave;
		}

		KeClearEvent( &secondaryRequest->CompleteEvent );

		if (secondaryRequest->ExecuteStatus != STATUS_SUCCESS) {

			if (IrpContext->OriginatingIrp)
				PrintIrp( Dbg2, "secondaryRequest->ExecuteStatus != STATUS_SUCCESS", NULL, IrpContext->OriginatingIrp );
			DebugTrace2( 0, Dbg2, ("secondaryRequest->ExecuteStatus != STATUS_SUCCESS file = %s, line = %d\n", __FILE__, __LINE__) );

			FatRaiseStatus( IrpContext, STATUS_CANT_WAIT );
		}

		ndfsWinxpReplytHeader = (PNDFS_WINXP_REPLY_HEADER)secondaryRequest->NdfsReplyData;
		status = ndfsWinxpReplytHeader->Status;
		Irp->IoStatus.Information = write.Length;

		if (ndfsWinxpReplytHeader->Status != STATUS_SUCCESS) {

			DebugTrace2( 0, Dbg2, ("NdNtfsSecondaryCommonWrite: ndfsWinxpReplytHeader->Status = %x\n", ndfsWinxpReplytHeader->Status) );
			ASSERT( ndfsWinxpReplytHeader->Information == 0 );
		
		} else
			ASSERT( ndfsWinxpReplytHeader->FileInformationSet );
	
		if (ndfsWinxpReplytHeader->FileInformationSet) {

			PNDFS_FAT_MCB_ENTRY	mcbEntry;
			ULONG			index;

			BOOLEAN			lookupResut;
			VBO				vcn;
			LBO				lcn;
			//LBO			startingLcn;
			ULONG			clusterCount;

			//DbgPrint( "w ndfsWinxpReplytHeader->FileSize = %x\n", ndfsWinxpReplytHeader->FileSize );

			if (ndfsWinxpReplytHeader->AllocationSize != fcb->Header.AllocationSize.QuadPart) {

				ASSERT( ExIsResourceAcquiredExclusiveLite(fcb->Header.Resource) );

				ASSERT( ndfsWinxpReplytHeader->AllocationSize > fcb->Header.AllocationSize.QuadPart );

				mcbEntry = (PNDFS_FAT_MCB_ENTRY)( ndfsWinxpReplytHeader+1 );

				for (index=0, vcn=0; index < ndfsWinxpReplytHeader->NumberOfMcbEntry; index++, mcbEntry++) {

					lookupResut = FatLookupMcbEntry( vcb, &fcb->Mcb, vcn, &lcn, &clusterCount, NULL );
					
					if (lookupResut == TRUE && vcn < fcb->Header.AllocationSize.QuadPart) {

						ASSERT( lookupResut == TRUE );
						//ASSERT( startingLcn == lcn );
						ASSERT( vcn == mcbEntry->Vcn );
						ASSERT( lcn == (((LBO)mcbEntry->Lcn) << vcb->AllocationSupport.LogOfBytesPerSector) );
						ASSERT( clusterCount <= mcbEntry->ClusterCount );

						if (clusterCount < mcbEntry->ClusterCount) {

							FatAddMcbEntry ( vcb, 
											 &fcb->Mcb, 
											 (VBO)mcbEntry->Vcn, 
											 ((LBO)mcbEntry->Lcn) << vcb->AllocationSupport.LogOfBytesPerSector, 
											 (ULONG)mcbEntry->ClusterCount );

							lookupResut = FatLookupMcbEntry( vcb, &fcb->Mcb, vcn, &lcn, &clusterCount, NULL );

							ASSERT( lookupResut == TRUE );
							//ASSERT( startingLcn == lcn );
							ASSERT( vcn == mcbEntry->Vcn );
							ASSERT( lcn == (((LBO)mcbEntry->Lcn) << vcb->AllocationSupport.LogOfBytesPerSector) );
							ASSERT( clusterCount == mcbEntry->ClusterCount );
						}
					
					} else { 

						ASSERT( lookupResut == FALSE || lcn == 0 );

						FatAddMcbEntry ( vcb, 
										 &fcb->Mcb, 
										 (VBO)mcbEntry->Vcn, 
										 ((LBO)mcbEntry->Lcn) << vcb->AllocationSupport.LogOfBytesPerSector, 
										 (ULONG)mcbEntry->ClusterCount );
					}

					vcn += (ULONG)mcbEntry->ClusterCount;
				}

				ASSERT( vcn == ndfsWinxpReplytHeader->AllocationSize );

				fcb->Header.AllocationSize.QuadPart = ndfsWinxpReplytHeader->AllocationSize;
				SetFlag( fcb->FcbState, FCB_STATE_TRUNCATE_ON_CLOSE );		

				if (CcIsFileCached(fileObject)) {

					ASSERT( fileObject->SectionObjectPointer->SharedCacheMap != NULL );
					CcSetFileSizes( fileObject, (PCC_FILE_SIZES)&fcb->Header.AllocationSize );
				}
			}

			DebugTrace2(0, Dbg, ("write scb->Header.FileSize.LowPart = %I64x, scb->Header.ValidDataLength.QuadPart = %I64x\n", 
								 fcb->Header.FileSize.LowPart, fcb->Header.ValidDataLength.QuadPart) );

		}

#if DBG
		{
			BOOLEAN			lookupResut;
			VBO				vcn;
			LBO				lcn;
			//LCN				startingLcn;
			ULONG			clusterCount;

			vcn = 0;
			while (1) {

				lookupResut = FatLookupMcbEntry( vcb, &fcb->Mcb, vcn, &lcn, &clusterCount, NULL );
				if (lookupResut == FALSE || lcn == 0)
					break;

				vcn += clusterCount;
			}

			ASSERT( vcn == fcb->Header.AllocationSize.QuadPart );
		}

#endif

	} finally {
	
		if (secondarySessionResourceAcquired == TRUE)
				SecondaryReleaseResourceLite( IrpContext, &volDo->Secondary->SessionResource );

		if (fcbAcquired) {
             FatReleaseFcb( IrpContext, fcb );
        }

		if (secondaryRequest)
			DereferenceSecondaryRequest( secondaryRequest );
	}
			
	return status;
}
Ejemplo n.º 4
0
IO_STATUS_BLOCK
NTAPI
FatiOpenExistingDcb(IN PFAT_IRP_CONTEXT IrpContext,
                    IN PFILE_OBJECT FileObject,
                    IN PVCB Vcb,
                    IN PFCB Dcb,
                    IN PACCESS_MASK DesiredAccess,
                    IN USHORT ShareAccess,
                    IN ULONG CreateDisposition,
                    IN BOOLEAN NoEaKnowledge,
                    IN BOOLEAN DeleteOnClose)
{
    IO_STATUS_BLOCK Iosb = {{0}};
    PCCB Ccb;

    /* Exclusively lock this FCB */
    FatAcquireExclusiveFcb(IrpContext, Dcb);

    /* Check if it's a delete-on-close of a root DCB */
    if (FatNodeType(Dcb) == FAT_NTC_ROOT_DCB && DeleteOnClose)
    {
        Iosb.Status = STATUS_CANNOT_DELETE;

        /* Release the lock and return */
        FatReleaseFcb(IrpContext, Dcb);
        return Iosb;
    }

    /*if (NoEaKnowledge && NodeType(Dcb) != FAT_NTC_ROOT_DCB &&
        !FatIsFat32(Vcb))
    {
        UNIMPLEMENTED;
    }*/

    /* Check the create disposition and desired access */
    if ((CreateDisposition != FILE_OPEN) &&
        (CreateDisposition != FILE_OPEN_IF))
    {
        Iosb.Status = STATUS_OBJECT_NAME_COLLISION;

        /* Release the lock and return */
        FatReleaseFcb(IrpContext, Dcb);
        return Iosb;
    }

#if 0
    if (!FatCheckFileAccess(IrpContext,
                            Dcb->DirentFatFlags,
                            DesiredAccess))
    {
        Iosb.Status = STATUS_ACCESS_DENIED;
        try_return( Iosb );
    }
#endif

    /* If it's already opened - check share access */
    if (Dcb->OpenCount > 0)
    {
        Iosb.Status = IoCheckShareAccess(*DesiredAccess,
                                         ShareAccess,
                                         FileObject,
                                         &Dcb->ShareAccess,
                                         TRUE);

        if (!NT_SUCCESS(Iosb.Status))
        {
            /* Release the lock and return */
            FatReleaseFcb(IrpContext, Dcb);
            return Iosb;
        }
    }
    else
    {
        IoSetShareAccess(*DesiredAccess,
                         ShareAccess,
                         FileObject,
                         &Dcb->ShareAccess);
    }

    /* Set the file object */
    Ccb = FatCreateCcb();
    FatSetFileObject(FileObject,
                     UserDirectoryOpen,
                     Dcb,
                     Ccb);

    /* Increase counters */
    Dcb->UncleanCount++;
    Dcb->OpenCount++;
    Vcb->OpenFileCount++;
    if (IsFileObjectReadOnly(FileObject)) Vcb->ReadOnlyCount++;

    /* Set delete on close */
    if (DeleteOnClose)
        SetFlag(Ccb->Flags, CCB_DELETE_ON_CLOSE);

    /* Clear delay close flag */
    ClearFlag(Dcb->State, FCB_STATE_DELAY_CLOSE);

    /* That's it */
    Iosb.Status = STATUS_SUCCESS;
    Iosb.Information = FILE_OPENED;

    /* Release the lock */
    FatReleaseFcb(IrpContext, Dcb);

    return Iosb;
}
Ejemplo n.º 5
0
IO_STATUS_BLOCK
NTAPI
FatiOpenExistingFcb(IN PFAT_IRP_CONTEXT IrpContext,
                    IN PFILE_OBJECT FileObject,
                    IN PVCB Vcb,
                    IN PFCB Fcb,
                    IN PACCESS_MASK DesiredAccess,
                    IN USHORT ShareAccess,
                    IN ULONG AllocationSize,
                    IN PFILE_FULL_EA_INFORMATION EaBuffer,
                    IN ULONG EaLength,
                    IN UCHAR FileAttributes,
                    IN ULONG CreateDisposition,
                    IN BOOLEAN NoEaKnowledge,
                    IN BOOLEAN DeleteOnClose,
                    IN BOOLEAN OpenedAsDos,
                    OUT PBOOLEAN OplockPostIrp)
{
    IO_STATUS_BLOCK Iosb = {{0}};
    ACCESS_MASK AddedAccess = 0;
    BOOLEAN Hidden;
    BOOLEAN System;
    PCCB Ccb = NULL;
    NTSTATUS Status, StatusPrev;

    /* Acquire exclusive FCB lock */
    (VOID)FatAcquireExclusiveFcb(IrpContext, Fcb);

    *OplockPostIrp = FALSE;

    /* Check if there is a batch oplock */
    if (FsRtlCurrentBatchOplock(&Fcb->Fcb.Oplock))
    {
        /* Return with a special information field */
        Iosb.Information = FILE_OPBATCH_BREAK_UNDERWAY;

        /* Check the oplock */
        Iosb.Status = FsRtlCheckOplock(&Fcb->Fcb.Oplock,
                                       IrpContext->Irp,
                                       IrpContext,
                                       FatOplockComplete,
                                       FatPrePostIrp);

        if (Iosb.Status != STATUS_SUCCESS &&
            Iosb.Status != STATUS_OPLOCK_BREAK_IN_PROGRESS)
        {
            /* The Irp needs to be queued */
            *OplockPostIrp = TRUE;

            /* Release the FCB and return */
            FatReleaseFcb(IrpContext, Fcb);
            return Iosb;
        }
    }

    /* Validate parameters and modify access */
    if (CreateDisposition == FILE_CREATE)
    {
        Iosb.Status = STATUS_OBJECT_NAME_COLLISION;

        /* Release the FCB and return */
        FatReleaseFcb(IrpContext, Fcb);
        return Iosb;
    }
    else if (CreateDisposition == FILE_SUPERSEDE)
    {
        SetFlag(AddedAccess, DELETE & ~(*DesiredAccess));
        *DesiredAccess |= DELETE;
    }
    else if ((CreateDisposition == FILE_OVERWRITE) ||
             (CreateDisposition == FILE_OVERWRITE_IF))
    {
        SetFlag(AddedAccess,
                (FILE_WRITE_DATA | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES)
                & ~(*DesiredAccess) );

        *DesiredAccess |= FILE_WRITE_DATA | FILE_WRITE_EA | FILE_WRITE_ATTRIBUTES;
    }

    // TODO: Check desired access

    // TODO: Check if this file is readonly and DeleteOnClose is set

    /* Validate disposition information */
    if ((CreateDisposition == FILE_SUPERSEDE) ||
        (CreateDisposition == FILE_OVERWRITE) ||
        (CreateDisposition == FILE_OVERWRITE_IF))
    {
        // TODO: Get this attributes from the dirent
        Hidden = FALSE;
        System = FALSE;

        if ((Hidden && !FlagOn(FileAttributes, FILE_ATTRIBUTE_HIDDEN)) ||
            (System && !FlagOn(FileAttributes, FILE_ATTRIBUTE_SYSTEM)))
        {
            DPRINT1("Hidden/system attributes don't match\n");

            Iosb.Status = STATUS_ACCESS_DENIED;

            /* Release the FCB and return */
            FatReleaseFcb(IrpContext, Fcb);
            return Iosb;
        }

        // TODO: Check for write protected volume
    }

    /* Check share access */
    Iosb.Status = IoCheckShareAccess(*DesiredAccess,
                                     ShareAccess,
                                     FileObject,
                                     &Fcb->ShareAccess,
                                     FALSE);
    if (!NT_SUCCESS(Iosb.Status))
    {
        /* Release the FCB and return */
        FatReleaseFcb(IrpContext, Fcb);
        return Iosb;
    }

    /* Check the oplock status after checking for share access */
    Iosb.Status = FsRtlCheckOplock(&Fcb->Fcb.Oplock,
                                   IrpContext->Irp,
                                   IrpContext,
                                   FatOplockComplete,
                                   FatPrePostIrp );

    if (Iosb.Status != STATUS_SUCCESS &&
        Iosb.Status != STATUS_OPLOCK_BREAK_IN_PROGRESS)
    {
        /* The Irp needs to be queued */
        *OplockPostIrp = TRUE;

        /* Release the FCB and return */
        FatReleaseFcb(IrpContext, Fcb);
        return Iosb;
    }

    /* Set Fast I/O flag */
    Fcb->Header.IsFastIoPossible = FALSE; //FatiIsFastIoPossible(Fcb);

    /* Make sure image is not mapped */
    if (DeleteOnClose || FlagOn(*DesiredAccess, FILE_WRITE_DATA))
    {
        /* Try to flush the image section */
        if (!MmFlushImageSection(&Fcb->SectionObjectPointers, MmFlushForWrite))
        {
            /* Yes, image section exists, set correct status code */
            if (DeleteOnClose)
                Iosb.Status = STATUS_CANNOT_DELETE;
            else
                Iosb.Status = STATUS_SHARING_VIOLATION;

            /* Release the FCB and return */
            FatReleaseFcb(IrpContext, Fcb);
            return Iosb;
        }
    }

    /* Flush the cache if it's non-cached non-pagefile access */
    if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING) &&
        Fcb->SectionObjectPointers.DataSectionObject &&
        !FlagOn(Fcb->State, FCB_STATE_PAGEFILE))
    {
        /* Set the flag that create is in progress */
        SetFlag(Fcb->Vcb->State, VCB_STATE_CREATE_IN_PROGRESS);

        /* Flush the cache */
        CcFlushCache(&Fcb->SectionObjectPointers, NULL, 0, NULL);

        /* Acquire and release Paging I/O resource before purging the cache section
           to let lazy writer finish */
        ExAcquireResourceExclusiveLite( Fcb->Header.PagingIoResource, TRUE);
        ExReleaseResourceLite( Fcb->Header.PagingIoResource );

        /* Delete the cache section */
        CcPurgeCacheSection(&Fcb->SectionObjectPointers, NULL, 0, FALSE);

        /* Clear the flag */
        ClearFlag(Fcb->Vcb->State, VCB_STATE_CREATE_IN_PROGRESS);
    }

    /* Check create disposition flags and branch accordingly */
    if (CreateDisposition == FILE_OPEN ||
        CreateDisposition == FILE_OPEN_IF)
    {
        DPRINT("Opening a file\n");

        /* Check if we need to bother with EA */
        if (NoEaKnowledge && FALSE /* FatIsFat32(Vcb)*/)
        {
            UNIMPLEMENTED;
        }

        /* Set up file object */
        Ccb = FatCreateCcb();
        FatSetFileObject(FileObject,
                         UserFileOpen,
                         Fcb,
                         Ccb);

        FileObject->SectionObjectPointer = &Fcb->SectionObjectPointers;

        /* The file is opened */
        Iosb.Information = FILE_OPENED;
        goto SuccComplete;
    }
    else if ((CreateDisposition == FILE_SUPERSEDE) ||
             (CreateDisposition == FILE_OVERWRITE) ||
             (CreateDisposition == FILE_OVERWRITE_IF))
    {
        /* Remember previous status */
        StatusPrev = Iosb.Status;

        // TODO: Check system security access

        /* Perform overwrite operation */
        Iosb = FatiOverwriteFile(IrpContext,
                                 FileObject,
                                 Fcb,
                                 AllocationSize,
                                 EaBuffer,
                                 EaLength,
                                 FileAttributes,
                                 CreateDisposition,
                                 NoEaKnowledge);

        /* Restore previous status in case of success */
        if (Iosb.Status == STATUS_SUCCESS)
            Iosb.Status = StatusPrev;

        /* Fall down to completion */
    }
    else
    {
        /* We can't get here */
        KeBugCheckEx(FAT_FILE_SYSTEM, CreateDisposition, 0, 0, 0);
    }


SuccComplete:
    /* If all is fine */
    if (Iosb.Status != STATUS_PENDING &&
        NT_SUCCESS(Iosb.Status))
    {
        /* Update access if needed */
        if (AddedAccess)
        {
            /* Remove added access flags from desired access */
            ClearFlag(*DesiredAccess, AddedAccess);

            /* Check share access */
            Status = IoCheckShareAccess(*DesiredAccess,
                                        ShareAccess,
                                        FileObject,
                                        &Fcb->ShareAccess,
                                        TRUE);

            /* Make sure it's success */
            ASSERT(Status == STATUS_SUCCESS);
        }
        else
        {
            /* Update the share access */
            IoUpdateShareAccess(FileObject, &Fcb->ShareAccess);
        }

        /* Clear the delay close */
        ClearFlag(Fcb->State, FCB_STATE_DELAY_CLOSE);

        /* Increase counters */
        Fcb->UncleanCount++;
        Fcb->OpenCount++;
        Vcb->OpenFileCount++;
        if (IsFileObjectReadOnly(FileObject)) Vcb->ReadOnlyCount++;
        if (FlagOn(FileObject->Flags, FO_NO_INTERMEDIATE_BUFFERING)) Fcb->NonCachedUncleanCount++;

        // TODO: Handle DeleteOnClose and OpenedAsDos by storing those flags in CCB
    }

    return Iosb;
}
Ejemplo n.º 6
0
/* Last handle to a file object is closed */
NTSTATUS
NTAPI
FatiCleanup(PFAT_IRP_CONTEXT IrpContext, PIRP Irp)
{
    PIO_STACK_LOCATION IrpSp;
    PFILE_OBJECT FileObject;
    TYPE_OF_OPEN TypeOfOpen;
    PSHARE_ACCESS ShareAccess;
    BOOLEAN SendUnlockNotification = FALSE;
    PLARGE_INTEGER TruncateSize = NULL;
    //LARGE_INTEGER LocalTruncateSize;
    BOOLEAN AcquiredVcb = FALSE, AcquiredFcb = FALSE;
    NTSTATUS Status;
    PVCB Vcb;
    PFCB Fcb;
    PCCB Ccb;

    IrpSp = IoGetCurrentIrpStackLocation( Irp );

    DPRINT("FatiCleanup\n");
    DPRINT("\tIrp           = %p\n", Irp);
    DPRINT("\t->FileObject  = %p\n", IrpSp->FileObject);

    FileObject = IrpSp->FileObject;
    TypeOfOpen = FatDecodeFileObject(FileObject, &Vcb, &Fcb, &Ccb);

    if (TypeOfOpen == UnopenedFileObject)
    {
        DPRINT1("Unopened File Object\n");

        FatCompleteRequest(IrpContext, Irp, STATUS_SUCCESS);
        return STATUS_SUCCESS;
    }

    if (FlagOn( FileObject->Flags, FO_CLEANUP_COMPLETE ))
    {
        /* Just flush the file */

        if (FlagOn(Vcb->State, VCB_STATE_FLAG_DEFERRED_FLUSH) &&
            FlagOn(FileObject->Flags, FO_FILE_MODIFIED) &&
            !FlagOn(Vcb->State, VCB_STATE_FLAG_WRITE_PROTECTED) &&
            (TypeOfOpen == UserFileOpen))
        {
            //Status = FatFlushFile(IrpContext, Fcb, Flush);
            //if (!NT_SUCCESS(Status)) FatNormalizeAndRaiseStatus(IrpContext, Status);
            UNIMPLEMENTED;
        }

        FatCompleteRequest(IrpContext, Irp, STATUS_SUCCESS);
        return STATUS_SUCCESS;
    }

    if (TypeOfOpen == UserFileOpen ||
        TypeOfOpen == UserDirectoryOpen)
    {
        ASSERT(Fcb != NULL);

        (VOID)FatAcquireExclusiveFcb(IrpContext, Fcb);

        AcquiredFcb = TRUE;

        /* Set FCB flags according to DELETE_ON_CLOSE */
        if (FlagOn(Ccb->Flags, CCB_DELETE_ON_CLOSE))
        {
            ASSERT(FatNodeType(Fcb) != FAT_NTC_ROOT_DCB);

            SetFlag(Fcb->State, FCB_STATE_DELETE_ON_CLOSE);

            /* Issue a notification */
            if (TypeOfOpen == UserDirectoryOpen)
            {
                FsRtlNotifyFullChangeDirectory(Vcb->NotifySync,
                                               &Vcb->NotifyList,
                                               FileObject->FsContext,
                                               NULL,
                                               FALSE,
                                               FALSE,
                                               0,
                                               NULL,
                                               NULL,
                                               NULL);
            }
        }

        /* If file should be deleted, acquire locks */
        if ((Fcb->UncleanCount == 1) &&
            FlagOn(Fcb->State, FCB_STATE_DELETE_ON_CLOSE) &&
            (Fcb->Condition != FcbBad) &&
            !FlagOn(Vcb->State, VCB_STATE_FLAG_WRITE_PROTECTED))
        {
            FatReleaseFcb(IrpContext, Fcb);
            AcquiredFcb = FALSE;

            (VOID)FatAcquireExclusiveVcb(IrpContext, Vcb);
            AcquiredVcb = TRUE;

            (VOID)FatAcquireExclusiveFcb(IrpContext, Fcb);
            AcquiredFcb = TRUE;
        }
    }

    /* Acquire VCB lock if it was a volume open */
    if (TypeOfOpen == UserVolumeOpen)
    {
        (VOID)FatAcquireExclusiveVcb(IrpContext, Vcb);
        AcquiredVcb = TRUE;
    }

    /* Cleanup all notifications */
    if (TypeOfOpen == UserDirectoryOpen)
    {
        FsRtlNotifyCleanup(Vcb->NotifySync,
                           &Vcb->NotifyList,
                           Ccb);
    }

    if (Fcb)
    {
        //TODO: FatVerifyFcb
    }

    switch (TypeOfOpen)
    {
    case DirectoryFile:
    case VirtualVolumeFile:
        DPRINT1("Cleanup VirtualVolumeFile/DirectoryFile\n");
        ShareAccess = NULL;
        break;

    case UserVolumeOpen:
        DPRINT("Cleanup UserVolumeOpen\n");

        if (FlagOn(Ccb->Flags, CCB_COMPLETE_DISMOUNT))
        {
            FatCheckForDismount( IrpContext, Vcb, TRUE );
        } else if (FileObject->WriteAccess &&
            FlagOn(FileObject->Flags, FO_FILE_MODIFIED))
        {
            UNIMPLEMENTED;
        }

        /* Release the volume and send notification */
        if (FlagOn(Vcb->State, VCB_STATE_FLAG_LOCKED) &&
            (Vcb->FileObjectWithVcbLocked == FileObject))
        {
            UNIMPLEMENTED;
            SendUnlockNotification = TRUE;
        }

        ShareAccess = &Vcb->ShareAccess;
        break;

    case EaFile:
        DPRINT1("Cleanup EaFileObject\n");
        ShareAccess = NULL;
        break;

    case UserDirectoryOpen:
        DPRINT("Cleanup UserDirectoryOpen\n");

        ShareAccess = &Fcb->ShareAccess;

        /* Should it be a delayed close? */
        if ((Fcb->UncleanCount == 1) &&
            (Fcb->OpenCount == 1) &&
            (Fcb->Dcb.DirectoryFileOpenCount == 0) &&
            !FlagOn(Fcb->State, FCB_STATE_DELETE_ON_CLOSE) &&
            Fcb->Condition == FcbGood)
        {
            /* Yes, a delayed one */
            SetFlag(Fcb->State, FCB_STATE_DELAY_CLOSE);
        }

        if (VcbGood == Vcb->Condition)
        {
            //FatUpdateDirentFromFcb( IrpContext, FileObject, Fcb, Ccb );
            //TODO: Actually update dirent
        }

        if ((Fcb->UncleanCount == 1) &&
            (FatNodeType(Fcb) == FAT_NTC_DCB) &&
            (FlagOn(Fcb->State, FCB_STATE_DELETE_ON_CLOSE)) &&
            (Fcb->Condition != FcbBad) &&
            !FlagOn(Vcb->State, VCB_STATE_FLAG_WRITE_PROTECTED))
        {
            UNIMPLEMENTED;
        }

        /*  Decrement unclean counter */
        ASSERT(Fcb->UncleanCount != 0);
        Fcb->UncleanCount--;
        break;

    case UserFileOpen:
        DPRINT("Cleanup UserFileOpen\n");

        ShareAccess = &Fcb->ShareAccess;

        /* Should it be a delayed close? */
        if ((FileObject->SectionObjectPointer->DataSectionObject == NULL) &&
            (FileObject->SectionObjectPointer->ImageSectionObject == NULL) &&
            (Fcb->UncleanCount == 1) &&
            (Fcb->OpenCount == 1) &&
            !FlagOn(Fcb->State, FCB_STATE_DELETE_ON_CLOSE) &&
            Fcb->Condition == FcbGood)
        {
            /* Yes, a delayed one */
            //SetFlag(Fcb->State, FCB_STATE_DELAY_CLOSE);
            DPRINT1("Setting a delay on close for some reason for FCB %p, FF handle %p, file name '%wZ'\n", Fcb, Fcb->FatHandle, &Fcb->FullFileName);
        }

        /* Unlock all file locks */
        FsRtlFastUnlockAll(&Fcb->Fcb.Lock,
                           FileObject,
                           IoGetRequestorProcess(Irp),
                           NULL);

        if (Vcb->Condition == VcbGood)
        {
            if (Fcb->Condition != FcbBad)
            {
                //FatUpdateDirentFromFcb( IrpContext, FileObject, Fcb, Ccb );
                // TODO: Update on-disk structures
            }

            if (Fcb->UncleanCount == 1 &&
                Fcb->Condition != FcbBad)
            {
                //DELETE_CONTEXT DeleteContext;

                /* Should this file be deleted on close? */
                if (FlagOn(Fcb->State, FCB_STATE_DELETE_ON_CLOSE) &&
                    !FlagOn(Vcb->State, VCB_STATE_FLAG_WRITE_PROTECTED))
                {
                    UNIMPLEMENTED;
                }
                else
                {
                    if (!FlagOn(Fcb->State, FCB_STATE_PAGEFILE) &&
                        (Fcb->Header.ValidDataLength.LowPart < Fcb->Header.FileSize.LowPart))
                    {
#if 0
                        ULONG ValidDataLength;

                        ValidDataLength = Fcb->Header.ValidDataLength.LowPart;

                        if (ValidDataLength < Fcb->ValidDataToDisk) {
                            ValidDataLength = Fcb->ValidDataToDisk;
                        }

                        if (ValidDataLength < Fcb->Header.FileSize.LowPart)
                        {
                            FatZeroData( IrpContext,
                                Vcb,
                                FileObject,
                                ValidDataLength,
                                Fcb->Header.FileSize.LowPart -
                                ValidDataLength );

                            Fcb->ValidDataToDisk =
                                Fcb->Header.ValidDataLength.LowPart =
                                Fcb->Header.FileSize.LowPart;

                            if (CcIsFileCached(FileObject))
                            {
                                CcSetFileSizes(FileObject, (PCC_FILE_SIZES)&Fcb->Header.AllocationSize);
                            }
                        }
#endif
                        DPRINT1("Zeroing out data is not implemented\n");
                    }
                }

                /* Should the file be truncated on close? */
                if (FlagOn(Fcb->State, FCB_STATE_TRUNCATE_ON_CLOSE))
                {
                    if (Vcb->Condition == VcbGood)
                    {
                        // TODO: Actually truncate the file allocation
                        UNIMPLEMENTED;
                    }

                    /* Remove truncation flag */
                    Fcb->State &= ~FCB_STATE_TRUNCATE_ON_CLOSE;
                }

                /* Check again if it should be deleted */
                if (FlagOn(Fcb->State, FCB_STATE_DELETE_ON_CLOSE) &&
                    Fcb->Header.AllocationSize.LowPart == 0)
                {
                    FatNotifyReportChange(IrpContext,
                                          Vcb,
                                          Fcb,
                                          FILE_NOTIFY_CHANGE_FILE_NAME,
                                          FILE_ACTION_REMOVED);
                }

                /* Remove the entry from the splay table if the file was deleted */
                if (FlagOn(Fcb->State, FCB_STATE_DELETE_ON_CLOSE))
                {
                    FatRemoveNames(IrpContext, Fcb);
                }
            }
        }

        ASSERT(Fcb->UncleanCount != 0);
        Fcb->UncleanCount--;
        if (!FlagOn(FileObject->Flags, FO_CACHE_SUPPORTED))
        {
            ASSERT(Fcb->NonCachedUncleanCount != 0);
            Fcb->NonCachedUncleanCount--;
        }

        if (FlagOn(FileObject->Flags, FO_CACHE_SUPPORTED) &&
            (Fcb->NonCachedUncleanCount != 0) &&
            (Fcb->NonCachedUncleanCount == Fcb->UncleanCount) &&
            (Fcb->SectionObjectPointers.DataSectionObject != NULL))
        {
            CcFlushCache(&Fcb->SectionObjectPointers, NULL, 0, NULL);

            /* Acquire and release PagingIo to get in sync with lazy writer */
            ExAcquireResourceExclusiveLite(Fcb->Header.PagingIoResource, TRUE);
            ExReleaseResourceLite(Fcb->Header.PagingIoResource);

            CcPurgeCacheSection(&Fcb->SectionObjectPointers,
                                NULL,
                                0,
                                FALSE);
        }

        if (Fcb->Condition == FcbBad)
        {
            //TruncateSize = &FatLargeZero;
            UNIMPLEMENTED;
        }

        /*  Cleanup the cache map */
        CcUninitializeCacheMap(FileObject, TruncateSize, NULL);
        break;

    default:
        KeBugCheckEx(FAT_FILE_SYSTEM, __LINE__, (ULONG_PTR)TypeOfOpen, 0, 0);
    }

    /* Cleanup the share access */

    if (ShareAccess)
    {
        DPRINT("Cleaning up the share access\n");
        IoRemoveShareAccess(FileObject, ShareAccess);
    }

    if (TypeOfOpen == UserFileOpen)
    {
        /* Update oplocks */
        FsRtlCheckOplock(&Fcb->Fcb.Oplock,
                         Irp,
                         IrpContext,
                         NULL,
                         NULL);

        Fcb->Header.IsFastIoPossible = FatIsFastIoPossible(Fcb);
    }

    /* Set the FO_CLEANUP_COMPLETE flag */
    SetFlag(FileObject->Flags, FO_CLEANUP_COMPLETE);

    Status = STATUS_SUCCESS;

    // TODO: Unpin repinned BCBs
    //FatUnpinRepinnedBcbs(IrpContext);

    /* Flush the volume if necessary */
    if (FlagOn(Vcb->State, VCB_STATE_FLAG_DEFERRED_FLUSH) &&
        !FlagOn(Vcb->State, VCB_STATE_FLAG_WRITE_PROTECTED))
    {
        UNIMPLEMENTED;
    }

    /* Cleanup */
    if (AcquiredFcb) FatReleaseFcb(IrpContext, Fcb);
    if (AcquiredVcb) FatReleaseVcb(IrpContext, Vcb);

    /* Send volume notification */
    if (SendUnlockNotification)
        FsRtlNotifyVolumeEvent(FileObject, FSRTL_VOLUME_UNLOCK);

    return Status;
}
Ejemplo n.º 7
0
VOID
FatForceCacheMiss (
    IN PIRP_CONTEXT IrpContext,
    IN PFCB Fcb,
    IN FAT_FLUSH_TYPE FlushType
    )

/*++

Routine Description:

    The following routine asks either Cc or Mm to get rid of any cached
    pages on a file.  Note that this will fail if a user has mapped a file.

    If there is a shared cache map, purge the cache section.  Otherwise
    we have to go and ask Mm to blow away the section.

    NOTE: This caller MUST own the Vcb exclusive.

Arguments:

    Fcb - Supplies a pointer to an fcb

    FlushType - Specifies the kind of flushing to perform
    
Return Value:

    None.

--*/

{
    PVCB Vcb;
    BOOLEAN ChildrenAcquired = FALSE;

    PAGED_CODE();

    //
    //  If we can't wait, bail.
    //

    ASSERT( FatVcbAcquiredExclusive( IrpContext, Fcb->Vcb ) ||
            FlagOn( Fcb->Vcb->VcbState, VCB_STATE_FLAG_LOCKED ) );

    if (!FlagOn(IrpContext->Flags, IRP_CONTEXT_FLAG_WAIT)) {

        FatRaiseStatus( IrpContext, STATUS_CANT_WAIT );
    }

    //
    //  If we are purging a directory file object, we must acquire all the
    //  FCBs exclusive so that the parent directory is not being pinned.
    //  Careful, we can collide with something acquiring up the tree like
    //  an unpin repinned flush (FsRtlAcquireFileForCcFlush ...) of a parent
    //  dir on extending writethrough of a child file (oops).  So get things
    //  going up the tree, not down.
    //

    if ((NodeType(Fcb) != FAT_NTC_FCB) &&
        !IsListEmpty(&Fcb->Specific.Dcb.ParentDcbQueue)) {

        PLIST_ENTRY Links;
        PFCB TempFcb;

        ChildrenAcquired = TRUE;

        for (Links = Fcb->Specific.Dcb.ParentDcbQueue.Flink;
             Links != &Fcb->Specific.Dcb.ParentDcbQueue;
             Links = Links->Flink) {

            TempFcb = CONTAINING_RECORD( Links, FCB, ParentDcbLinks );

            (VOID)FatAcquireExclusiveFcb( IrpContext, TempFcb );
        }
    }

    (VOID)FatAcquireExclusiveFcb( IrpContext, Fcb );

    //
    //  We use this flag to indicate to a close beneath us that
    //  the Fcb resource should be freed before deleting the Fcb.
    //

    Vcb = Fcb->Vcb;

    SetFlag( Fcb->FcbState, FCB_STATE_FORCE_MISS_IN_PROGRESS );

    ClearFlag( Vcb->VcbState, VCB_STATE_FLAG_DELETED_FCB );

    try {

        BOOLEAN DataSectionExists;
        BOOLEAN ImageSectionExists;

        PSECTION_OBJECT_POINTERS Section;

        if ( FlushType ) {

            (VOID)FatFlushFile( IrpContext, Fcb, FlushType );
        }

        //
        //  The Flush may have made the Fcb go away
        //

        if (!FlagOn(Vcb->VcbState, VCB_STATE_FLAG_DELETED_FCB)) {

            Section = &Fcb->NonPaged->SectionObjectPointers;

            DataSectionExists = (BOOLEAN)(Section->DataSectionObject != NULL);
            ImageSectionExists = (BOOLEAN)(Section->ImageSectionObject != NULL);

            //
            //  Note, it is critical to do the Image section first as the
            //  purge of the data section may cause the image section to go
            //  away, but the opposite is not true.
            //

            if (ImageSectionExists) {

                (VOID)MmFlushImageSection( Section, MmFlushForWrite );
            }

            if (DataSectionExists) {

                CcPurgeCacheSection( Section, NULL, 0, FALSE );
            }
        }

    } finally {

        //
        //  If we purging a directory file object, release all the Fcb
        //  resources that we acquired above.  The Dcb cannot have vanished
        //  if there were Fcbs underneath it, and the Fcbs couldn't have gone
        //  away since I own the Vcb.
        //

        if (ChildrenAcquired) {

            PLIST_ENTRY Links;
            PFCB TempFcb;

            for (Links = Fcb->Specific.Dcb.ParentDcbQueue.Flink;
                 Links != &Fcb->Specific.Dcb.ParentDcbQueue;
                 Links = Links->Flink) {

                TempFcb = CONTAINING_RECORD( Links, FCB, ParentDcbLinks );

                FatReleaseFcb( IrpContext, TempFcb );
            }
        }

        //
        //  Since we have the Vcb exclusive we know that if any closes
        //  come in it is because the CcPurgeCacheSection caused the
        //  Fcb to go away.  Also in close, the Fcb was released
        //  before being freed.
        //

        if ( !FlagOn(Vcb->VcbState, VCB_STATE_FLAG_DELETED_FCB) ) {

            ClearFlag( Fcb->FcbState, FCB_STATE_FORCE_MISS_IN_PROGRESS );

            FatReleaseFcb( (IRPCONTEXT), Fcb );
        }
    }
}