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cwindowsdriverminifilterfilter-driver

What is the IRP message generated on file delete in a filter driver?


I am trying to create a filter driver to block file deletion operations, but I can't identify the IRP message on deleting files.

I worked with the code below; it works in windows 7 but not in windows version 8 or later.

if (pIrp->MajorFunction==IRP_MJ_WRITE || pIrp->MajorFunction==IRP_MJ_SET_INFORMATION ||
            pIrp->MajorFunction==IRP_MJ_SET_VOLUME_INFORMATION || pIrp->MajorFunction==IRP_MJ_SET_SECURITY ||
            pIrp->MajorFunction==IRP_MJ_SET_QUOTA)
    {
                             DbgPrint("fdrv :Read only operation block");
            Irp->IoStatus.Status = STATUS_ACCESS_DENIED;//Deny Access
            Irp->IoStatus.Information = 0;
            IoCompleteRequest(Irp, IO_NO_INCREMENT);
            return STATUS_ACCESS_DENIED;

            }

Solution

  • exist 2 ways to delete file

    --

    union {
        PVOID Buffer;
        PFILE_DISPOSITION_INFORMATION pfdi;
        PFILE_DISPOSITION_INFORMATION_EX pfdi_ex;
    };
    PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
    switch (IrpSp->MajorFunction)
    {
    case IRP_MJ_SET_INFORMATION:
        Buffer = Irp->AssociatedIrp.SystemBuffer;
        switch (IrpSp->Parameters.SetFile.FileInformationClass)
        {
        case FileDispositionInformation:
            if (pfdi->DeleteFile)
            {
                //
            }
            break;
        case FileDispositionInformationEx:
            if (pfdi_ex->Flags & FILE_DISPOSITION_DELETE)
            {
                //
            }
            break;
        }
        break;
    case IRP_MJ_CREATE:
        if (IrpSp->Parameters.Create.Options & FILE_DELETE_ON_CLOSE)
        {
            //
        }
        break;
    }