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Unable to read the source file or disk

stevezhougsstevezhougs Member Posts: 9

minifilter driver in win11.
If implement GenerateFileName with FilterRegistration ,once deleting file in Partition C, it prompts:

Can't read from the source file or disk.

If I change NcGenerateFileName to NULL,it work well. Why?

CONST FLT_REGISTRATION FilterRegistration = {
    sizeof( FLT_REGISTRATION ),         //  Size
    FLT_REGISTRATION_VERSION,           //  Version
    0,                                  //  Flags
    ContextNotifications,               //  Context
    Callbacks,                          //  Operation callbacks
    FilterUnload,                       //  MiniFilterUnload
    InstanceSetup,                      //  InstanceSetup
    InstanceQueryTeardown,              //  InstanceQueryTeardown
    NULL,                               //  InstanceTeardownStart
    NULL,                               //  InstanceTeardownComplete
    NcGenerateFileName,                               //  GenerateFileName
    NormalizeNameComponent,                               //  GenerateDestinationFileName
    NULL                                //  NormalizeNameComponent
};
NTSTATUS
FLTAPI GenerateFileName( Instance, FileObject,  CallbackData, NameOptions, CacheFileNameInformation, FileName)
{
    ...
    ClearFlag(NameOptions, FLT_FILE_NAME_REQUEST_FROM_CURRENT_PROVIDER);
    if (FlagOn(NameOptions, FLT_FILE_NAME_NORMALIZED)){
        ClearFlag(NameOptions, FLT_FILE_NAME_NORMALIZED);
        SetFlag(NameOptions, FLT_FILE_NAME_OPENED);
    }

    if (CallbackData){
        Status = FltGetFileNameInformation(CallbackData, NameOptions, &FileNameInformation);
    }
    else{
        Status = FltGetFileNameInformationUnsafe(StreamObject, Instance, NameOptions, &FileNameInformation);
    }

    Status = FltCheckAndGrowNameControl(FileName, FileNameInformation->Name.Length);
    ....
    RtlCopyUnicodeString(&FileName->Name, &FileNameInformation->Name);
    ....
    Status = STATUS_SUCCESS;
    ...
    return Status;
}~~~~

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