Re: [PATCH v4] Export MDRAID bitmap on disk structure in UAPI header file

[Christoph Hellwig]

On Tue, Feb 18, 2025 at 12:38:49PM +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.

And despite multiple resends this still is not a userspace ABI in any
sense of the word.  Just copy the header defining the stable on-disk
format.