From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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.lore.kernel.org (Postfix) with ESMTPS id 9AEB8D2127B for ; Fri, 18 Oct 2024 09:06:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=9bIzrIihdcipzKF7iYz6VoA32I9H9GmU3Qk4oDZNZxE=; b=pf4D5i1u11LJL6LVBuxgkD/jkD uYhHQny6xoaxC/znO9vBjcitRhYr0LP4wObrf2hVgNgBgwS3upA5iRp4c13QemG/D50AC9vE3ECoN HC3HzoOKUG0PXfasQkroxV8wGGZAFeoJ5YwfEjAd938iAv3a/LUC7hKjI57p6XtyrnygtPoVaAJEq f6mQgJOMZVpMe35TR1ri5a+Sv5dtO7rrWUhLIkEhEMLRwKI+UtxSTxLp2I0clWdQRDNLdIJWsvpW6 2xo20Mc0PUaZy+HiDP7Rkest3xzQtQFRm3hyWmQyX0d86jN6sr9kNowhk6YU7PjOW5edZf3Raf5vU EiIsGTEg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1t1iwM-000000006yI-2r9s; Fri, 18 Oct 2024 09:06:34 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1t1it3-0000000060U-42VM for linux-nvme@lists.infradead.org; Fri, 18 Oct 2024 09:03:12 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 6CE38227AB1; Fri, 18 Oct 2024 11:02:59 +0200 (CEST) Date: Fri, 18 Oct 2024 11:02:59 +0200 From: Christoph Hellwig To: Anuj Gupta Cc: Christoph Hellwig , axboe@kernel.dk, kbusch@kernel.org, martin.petersen@oracle.com, asml.silence@gmail.com, anuj1072538@gmail.com, krisman@suse.de, io-uring@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, gost.dev@samsung.com, linux-scsi@vger.kernel.org, vishak.g@samsung.com Subject: Re: [PATCH v4 11/11] scsi: add support for user-meta interface Message-ID: <20241018090259.GA30253@lst.de> References: <20241016112912.63542-1-anuj20.g@samsung.com> <20241016112912.63542-12-anuj20.g@samsung.com> <20241017113923.GC1885@green245> <20241017143918.GC21905@lst.de> <20241018082648.GA32006@green245> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241018082648.GA32006@green245> User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241018_020310_163341_46E0E6C6 X-CRM114-Status: GOOD ( 16.87 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Fri, Oct 18, 2024 at 01:56:48PM +0530, Anuj Gupta wrote: > > Just curious, do you have any user of the more fine grained checking > > in NVMe? If not we could support the SCSI semantics only and emulate > > them using the fine grained NVMe semantics and have no portability > > problems. > > We can choose to support scsi semantics only and expose only the valid > scsi combinations to userspace i.e. > > 1. no check > 2. guard check only > 3. ref + app check only > 4. guard + ref + app check > > Something like this [*] on top of this series, untested though. Does > this align with what you have in mind? That is indeed what I had in mind. But I'd really like to hear from Martin on this as well.