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 BB078ECAAA1 for ; Tue, 6 Sep 2022 09:35:45 +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=GmOju39ql7HAJFwpUo4KznTlyCzWoxpz9anlvvBTAYc=; b=1qJHDUMu13pplpxrTyE/58MKhq 50WXoy9k+ClVwQNjQOXqafIfR6rRiE87L0eyU7HQzSJBFTjsftmuCGMGGODoV9xMniEb/w/hdbQFc v6lHUt6ucJomQZxXrZLg5+BrsvB0q3WiqYefE0irZ/t4vx4TKd6Lzn3fSyljiLdPGL0IE6DVcsO3I W+tKiLd7Z9dTJGvSZxli5sPH/4QlU2WS1nH4UwY/HYrfyyIOpEI7HJ6LDR00KCY2Sqpxd/5y422cD DHq093tk/hc3gnwZRMqIW2zM8IpVuoIfG0FbW5uOXtTEy9+2k8RREgemhCf97so5UFtvzlCTCliXp QoAgno3A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oVUzd-00BuEu-OY; Tue, 06 Sep 2022 09:35:41 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oVUzZ-00Bu6X-4s for linux-nvme@lists.infradead.org; Tue, 06 Sep 2022 09:35:39 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 0F8F968AA6; Tue, 6 Sep 2022 11:35:28 +0200 (CEST) Date: Tue, 6 Sep 2022 11:35:27 +0200 From: Christoph Hellwig To: Max Gurtovoy Cc: Christoph Hellwig , Chao Leng , "Martin K. Petersen" , linux-nvme@lists.infradead.org, sagi@grimberg.me, kbusch@kernel.org Subject: Re: [PATCH] nvme: add DIX support for nvme-rdma Message-ID: <20220906093527.GA14205@lst.de> References: <20220829081256.24570-1-lengchao@huawei.com> <673f2871-3c0d-3910-c9b7-7cb4913c7cd5@nvidia.com> <59dc78d8-c91d-6a7a-339e-b191cb77fd31@huawei.com> <289da5df-e988-f0a9-95cd-2c437327a043@huawei.com> <20220905063759.GB2092@lst.de> <79f9829f-3337-6582-7ea7-6de5c8afc69b@huawei.com> <20220906065903.GA2345@lst.de> <42216010-70a0-e0ef-2b4f-b25072792f36@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <42216010-70a0-e0ef-2b4f-b25072792f36@nvidia.com> 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-20220906_023537_385574_A7809623 X-CRM114-Status: GOOD ( 11.89 ) 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 Tue, Sep 06, 2022 at 12:34:13PM +0300, Max Gurtovoy wrote: > Maybe we can extend the spec and say that for Fabrics only we can use > IP_CSUM as protection for "host_buf-------->host HBA". > > On the wire we'll use extended LBA with CRC as defined today. Please read up on the concept of end to end data protection again.