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

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Message-ID: <Z7V2BOHbY5oslIeO@infradead.org>
Date: Tue, 18 Feb 2025 22:11:16 -0800
From: Christoph Hellwig <hch@...radead.org>
To: Tomas Mudrunka <tomas.mudrunka@...il.com>
Cc: yukuai3@...wei.com, linux-kernel@...r.kernel.org,
	linux-raid@...r.kernel.org, mtkaczyk@...nel.org, song@...nel.org
Subject: Re: [PATCH v4] Export MDRAID bitmap on disk structure in UAPI header
 file

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.