Disk's State Update Problem for KMDF DiskDrive UpperFilter Driver

NTDEV
1

Hello!

After Installing my driver, Windows prompt for restart to apply changes. Then after restarting, From the User Mode, I store the unique identifier in the registry which I made to distinguish the disks and In Kernel Mode Driver.

Then I check for that disk and Intercept the IOCTL_DISK_IS_WRITABLE. I am calling the EvtIoDeviceControl to intercept the IOCTLs and then I am returning STATUS_MEDIA_WRITE_PROTECTED like:

if (IoControlCode == IOCTL_DISK_IS_WRITABLE) {
    WdfRequestComplete(Request, STATUS_MEDIA_WRITE_PROTECTED);
    DbgPrint("IOCTL_DISK_IS_WRITABLE Write operation blocked for device with pdoName: %ws\n", pdoName);
    return;
}

In Disk Management, It shows Read Only in for the particular disk, But in the Explorer I can still create and write file for the same disk.

But after restarting again, The disk goes back to previous state like it deletes whatever files I created and the writes too and shows as Read Only everywhere!
That's the main problem!

Can someone please tell me why is this happening and how can I immediately notify windows that the disk is write protected without restarting it again?

2

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