From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6413F8C0B; Wed, 19 Feb 2025 06:11:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739945477; cv=none; b=DmJ4d//L5pygoqy/Fzu/nCF1gSS9KFqWWT4iGxRqt8VqmsIP0Hvy1Glt7msfYsUd+PseLs4daeFAdYBQwhNNOjcXauOUKaOmK5H9cS1tTaYHQ6B9EJaQ5FDUUqtDPxvUjsKo538eK8XjSCUCo/uZFzIPUUi1mNnWy3wMEZKS4KE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739945477; c=relaxed/simple; bh=EC7aRhWxEdFgnj9wDiew/+iEhJbj9rkcA+nuvj+3liM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=ABaZ9aJP8BCPhCFp3n/w9nIHVCA3t+fxKj1vMbO1jx9cB6FRc1GFzzoNBRCTEtmCO05utkMy+hTmmEEH5/aDu2eAXPi136zgG6FktYuFtM0vuv5+rGDilzbOMDwMSMvxb2awVAI7Plx/hZYIjlkQvhb3/Du5sSZTL7TsSnBuu6U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=1FqYmu6z; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="1FqYmu6z" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=oXouTXzjUnrhTVETNlXojPpLysEcZeYgvoq76tXJNj4=; b=1FqYmu6zMH/B7XG2sTb94l33jh kEbjksSuAMR3HhjZyiv4QctPeoPbC7PyKhA9q0erNljDXELeObc1DW082YhP06gvt3p9wvPsZRUMo SIQM933V/bXKnY0m5B2uA16W0vh4K78JlJDbehTqwnvg0lSjfbUMUAXrbON1UdOgM3btM+c4yGi5t X1RxNhBfPmxVcfcOpMEGp7hfBgoRM2uf22xAaHf7XeW8fffh0w8G4NEE/GOsXHn5GqCLJn2d+sJjl UwrDnlPEpNRLFHnAs6/H9HMmX7BB0pK9zKgMjE6Wcnd7G+uqz7w9nHstk9beVB2CsJI2kArspVrfq 6K8WEUtA==; Received: from hch by bombadil.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1tkdIi-0000000B0Ua-0FRg; Wed, 19 Feb 2025 06:11:16 +0000 Date: Tue, 18 Feb 2025 22:11:16 -0800 From: Christoph Hellwig To: Tomas Mudrunka Cc: yukuai3@huawei.com, linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, mtkaczyk@kernel.org, song@kernel.org Subject: Re: [PATCH v4] Export MDRAID bitmap on disk structure in UAPI header file Message-ID: References: <20250218113849.561007-1-tomas.mudrunka@gmail.com> Precedence: bulk X-Mailing-List: linux-raid@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250218113849.561007-1-tomas.mudrunka@gmail.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html 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.