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.