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.