Re: [PATCH] Export MDRAID bitmap on disk structure in UAPI header file

[Christoph Hellwig]

On Tue, Dec 31, 2024 at 04:09:27AM +0100, Tomas Mudrunka wrote:
> When working on software that manages MD RAID disks from
> userspace. Currently provided headers only contain MD superblock.
> That is not enough to fully populate MD RAID metadata.
> Therefore this patch adds bitmap superblock as well.

the bitmap format is not a userspace ABI, it is an on-disk format.
As such it does not belong into the uapi.  It might make sense to
create a clean standalone header just for the on-disk format that
you could copy, though.