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 X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD507C2D0A3 for ; Fri, 6 Nov 2020 14:14:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4C9EE20882 for ; Fri, 6 Nov 2020 14:14:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726939AbgKFOOd (ORCPT ); Fri, 6 Nov 2020 09:14:33 -0500 Received: from verein.lst.de ([213.95.11.211]:51728 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726812AbgKFOOc (ORCPT ); Fri, 6 Nov 2020 09:14:32 -0500 Received: by verein.lst.de (Postfix, from userid 2407) id 71E9868B02; Fri, 6 Nov 2020 15:14:29 +0100 (CET) Date: Fri, 6 Nov 2020 15:14:28 +0100 From: Christoph Hellwig To: Javier =?iso-8859-1?Q?Gonz=E1lez?= Cc: linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, hch@lst.de, kbusch@kernel.org, sagi@grimberg.me, axboe@kernel.dk, joshi.k@samsung.com, k.jensen@samsung.com, Niklas.Cassel@wdc.com, Javier =?iso-8859-1?Q?Gonz=E1lez?= Subject: Re: [PATCH] nvme: enable ro namespace for ZNS without append Message-ID: <20201106141428.GA23884@lst.de> References: <20201106122637.14490-1-javier.gonz@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201106122637.14490-1-javier.gonz@samsung.com> User-Agent: Mutt/1.5.17 (2007-11-01) Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org > +#ifdef CONFIG_BLK_DEV_ZONED > + if (blk_queue_is_zoned(disk->queue) && !ns->zoned_ns_supp) > + set_disk_ro(disk, true); > +#endif I think we can simplify this at bit. Add a new NVME_NS_FORCE_RO flag to ns->flags, set it in nvme_update_zone_info, and just query it here without any ifdefs. > struct request_queue *q = disk->queue; > struct nvme_command c = { }; > struct nvme_id_ns_zns *id; > + bool zoned_ns_supp = true; > int status; > > /* Driver requires zone append support */ > if (!(le32_to_cpu(log->iocs[nvme_cmd_zone_append]) & > NVME_CMD_EFFECTS_CSUPP)) { > + zoned_ns_supp = false; > dev_warn(ns->ctrl->device, > "append not supported for zoned namespace:%d\n", > ns->head->ns_id); > + } else { > + /* Lazily query controller append limit for the first > + * zoned namespace > + */ > + if (!ns->ctrl->max_zone_append) { > + status = nvme_set_max_append(ns->ctrl); > + if (status) > + return status; > + } While you're at it: my inverse the polarity of the if check as that reads just a little more natural, and maybe mention in the warning that the namespace is forced to read-only mode? Otherwise this looks good.