Re: [PATCH 0/5 -v2] Add support for VMUFAT filesystem

[Pedro Falcato]

On Sat, Apr 11, 2026 at 04:11:34PM +0100, Adrian McMenamin wrote:
> SEGA Dreamcasts come with a "visual memory unit" (VMU) which contains a slab
> of flash memory to save games playable on the VMU or data from Dreamcast games.
> 
> The VMU uses a file allocation based filesystem - which we label VMUFAT - to
> organise the data. With a control block, a file allocation table and a directory.
> 
> All physical VMUs are of the same size (256 blocks of 512 octets) but the
> filesystem itself is extendable to other sizes and need not be tied to the VMU.
> 
> These patches implement VMUFAT as a Linux filesystem independent of hardware.

Isn't this filesystem a great target for FUSE? You definitely don't need
super high performance here.

Also, you're missing the fs maintainers. Adding them.

> 
> It seems obvious almost all users will be those working with Linux on
> Dreamcasts or Dreamcast emulators but there is no dependence on SH or on the
> MTD layer.
> 
> VMUFAT has been tested on a 32 bit Dreamcast and on x86_64 systems.
> 
> Tools to format a filesystem are available here: 
> https://github.com/mcmenaminadrian/mkfs.vmufat
> 
> Signed-off-by: Adrian McMenamin <adrianmcmenamin@xxxxxxxxx>
> 
> Adrian McMenamin (5):
>   Add vmufat super.c
>   Add vmufat inode.c
>   Add vmufat header
>   Add vmufat documentation
>   miscellaneous vmufat changes and additions
> 
>  Documentation/filesystems/index.rst  |    1 +
>  Documentation/filesystems/vmufat.rst |  127 ++++
>  fs/Kconfig                           |    1 +
>  fs/Makefile                          |    1 +
>  fs/vmufat/Kconfig                    |   14 +
>  fs/vmufat/Makefile                   |    7 +
>  fs/vmufat/inode.c                    | 1017 ++++++++++++++++++++++++++
>  fs/vmufat/super.c                    |  581 +++++++++++++++
>  fs/vmufat/vmufat.h                   |  126 ++++
>  include/uapi/linux/magic.h           |    1 +
>  10 files changed, 1876 insertions(+)
>  create mode 100644 Documentation/filesystems/vmufat.rst
>  create mode 100644 fs/vmufat/Kconfig
>  create mode 100644 fs/vmufat/Makefile
>  create mode 100644 fs/vmufat/inode.c
>  create mode 100644 fs/vmufat/super.c
>  create mode 100644 fs/vmufat/vmufat.h
> 
> -- 
> 2.43.0
> 

-- 
Pedro