Add support for UDF mounts for optical drives (CD/DVD/Bluray)

[mliradelc]

Describe the feature

Add native support to Home Assistant OS for mounting UDF (Universal Disk Format) filesystems from optical drives (CD/DVD/Bluray). Home Assistant OS currently lacks the ability to automatically mount discs that use the UDF standard, which prevents addons from accessing them. This is a blocker for the development of my ARM (Automatic Ripping Machine) HASS Addon, which relies on this capability.

Use cases

This feature is important for any Home Assistant user who wants to interact with physical media. It would allow automations and addons to access content on CDs, DVDs, and Blu-rays for various purposes, such as:

• Automated Media Ripping: Enabling addons to automatically digitize music, movies, or software from discs inserted into a connected USB drive.
• Data Access & Backup: Allowing users to read data from archival discs or create backups directly to optical media.
• Expanding Home Assistant's Role: Transforming Home Assistant into a more capable, all-in-one home server that can manage not just smart devices, but also physical media libraries.

By natively supporting a common standard like UDF, Home Assistant becomes a more versatile and powerful platform for everyone, opening the door for developers to create a new class of media-focused addons and integrations.

Current workarounds

There are no viable workarounds within Home Assistant OS itself. While custom udev rules can help manage devices, they cannot mount a disc if the underlying UDF filesystem support is missing from the OS kernel.

The only alternatives are:

1. Using a Separate PC: The most common approach is to use another computer to read or rip the disc and then transfer the files to Home Assistant over the network. This is a manual process that defeats the purpose of automation.
2. Forking and Compiling HAOS: The only other technical solution is to fork the Home Assistant OS project, manually add the required UDF kernel modules, and compile a custom version of the OS. This is highly complex, unsustainable, and must be repeated for every new HAOS release.

Neither of these is a practical solution for the average user, highlighting the need for official support.

Anything else?

From a technical standpoint, this implementation would likely require adding the udf kernel module to the Home Assistant OS build. The Supervisor would also need the necessary permissions to manage these optical drive mounts, possibly through the existing udisk2 and D-Bus interfaces.

Security Consideration: Access to mounted optical media must be properly controlled. A permission model would be needed to ensure addons can only access disc contents after being explicitly granted permission by the user, preventing unauthorized data access from a connected drive.

This feature is the primary enabler for a whole class of community addons focused on physical media management, including my ARM HASS Addon.