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Intercept same CD/DVD access at 2 time

blknitblknit Member Posts: 22

We got a working minifilter driver. already developed a few years ago and only handled IRP_MJ_CREATE. It works well but when user replugin the same CD/DVD for Burn. I can't get IRP_MJ_CREATE preoperation callback function or instanceSetup be called. Sometimes it also happens on RAW Volume on usb.

What would I do in general to intercept the same CD/DVD or raw volume when it replugined?

Thanks for any suggestions.


  • blknitblknit Member Posts: 22

    I found that when replugin the CD I can get irp of IRP_MN_VERIFY_VOLUME and if RAW CD I get irp IRP_MN_USER_FS_REQUEST with FSCTL_IS_VOLUME_DIRTY. Can I use this as notification of CD plugin? like below:

        if (data->Iopb->MinorFunction == IRP_MN_USER_FS_REQUEST && 
            ctx->getFileSystemType() == FLT_FSTYPE_RAW && 
            data->Iopb->Parameters.FileSystemControl.Common.FsControlCode == FSCTL_IS_VOLUME_DIRTY) 
            // RAW CD/DVD plugin
        if (data->Iopb->MinorFunction == IRP_MN_VERIFY_VOLUME)
            // CDFS CD/DVD plugin
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