From patchwork Tue Apr 9 15:08:44 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Lehrer X-Patchwork-Id: 10891413 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9814D1708 for ; Tue, 9 Apr 2019 15:10:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 280EF285E8 for ; Tue, 9 Apr 2019 15:10:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1B7572886F; Tue, 9 Apr 2019 15:10:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ABEDE286A7 for ; Tue, 9 Apr 2019 15:10:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726487AbfDIPJ7 (ORCPT ); Tue, 9 Apr 2019 11:09:59 -0400 Received: from esa2.hgst.iphmx.com ([68.232.143.124]:3984 "EHLO esa2.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726456AbfDIPJ7 (ORCPT ); Tue, 9 Apr 2019 11:09:59 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1554822615; x=1586358615; h=from:to:cc:subject:date:message-id; bh=tTns3NWdvPncL7ovKcClltty6prWzEOUVJ/qV/YsXLU=; b=I9nhFYX35MfHvac32vXia4GugPY6g4BO1AhcE5FZxYrjEQYCihfyHspO 1EYvvidoOMalBdH5QwgNyys9GlJgqdrAb3mjF9m/oNGcBzMC1payKZ3gl dbCDCM88fly8MxB5URDc3YPYrKhHEUt3aGf/XN0mq9gzrLoGh7a8ANqrx jV26NcfQ8tlWpZTIfXcQUIq5fIzfsVpi40GHQAZrZGpR//3/4i50sCvMF DEaoJ/PZHYcVurJ4qu9F7DEJ8Agq54jQ7PmbCxV59N9JMjqqBQT9neoQt MfpqP+53PXaXt6e0pdhBghWqb2TRQu8jDljplLc5mRtkffRW3KOUHXtxV Q==; X-IronPort-AV: E=Sophos;i="5.60,329,1549900800"; d="scan'208";a="204253344" Received: from uls-op-cesaip01.wdc.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 09 Apr 2019 23:10:15 +0800 IronPort-SDR: T5c0qU5bEomP+6rOLM0ZDr5hnUswaITWprN9gSzcb6wiuFt9G0Y0cyuDL2guVlLQwckY4aNHQ8 l2A9wmeZrWxAa2S8LjNjwqdloBkCsKcCkNV0lrbTne+/VwDyM127LHWjgIx4hz6RRoAU7VgeYj vBXUqJfiIavVymV9cgKcHO9JREsLxU2zaQihobYOp/QzXJoF4kU3nQFJcMVfOWAiF4EBbg+uSw ZDa6qKAFSswRWi3UxvJMOot+2xx3EYP+cwPx2SyLg2kLmSP/Y1ve7pYHbQ282VO/OnXaOsm/qc V61M8c5Mu0OnY68ckjA8wdOY Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep01.wdc.com with ESMTP; 09 Apr 2019 07:46:55 -0700 IronPort-SDR: Ij45UTcdw4Vltqlo/tUV1va+Q7JHpmMkhWoeVKBVj2mKB/M9bmM5cDe1CthvGLj5K0i7G/xWVB lQUqwMH29L+eXp0iMMJDTW8yhhe+j6RBvRa6ujQRetI7PFOYUyCUPhIyef+3wKFuFwml5iaHvL 8oK+lh0aUXkfr5WEd2s1QN/dAfS/h5gNwJcFZSmKSPHzKXYQ7LRJHKoYK+lsLzI9+qG7S6KUN3 6j/n7QPzJjB1o1sEpqIihxueV0dkLWwseFaiaL+JdIQjOw1X34ntvpPdaClYz7vo63hW4KKEBI B68= Received: from z820.hgst.com (HELO z820.fms.local) ([10.41.103.236]) by uls-op-cesaip02.wdc.com with ESMTP; 09 Apr 2019 08:09:59 -0700 From: Mark Lehrer To: linux-block@vger.kernel.org Cc: axboe@kernel.dk, Damien.LeMoal@wdc.com, hch@infradead.org, Mark Lehrer Subject: [PATCH 1/1] brd: Add an option to disable 512e sector size Date: Tue, 9 Apr 2019 09:08:44 -0600 Message-Id: <20190409150844.26270-1-mark.lehrer@wdc.com> X-Mailer: git-send-email 2.17.1 Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Mark Lehrer This patch adds a new option, "disable_512e", which causes the driver to set the blk_queue_logical_block_size to 4K to match the blk_queue_physical_block_size. If this option is left at the default, brd will work the same way it always has so this shouldn't affect anyone unexpectedly. Signed-off-by: Mark Lehrer diff -uprN a/drivers/block/brd.c b/drivers/block/brd.c --- a/drivers/block/brd.c 2019-04-08 09:57:42.016921473 -0600 +++ b/drivers/block/brd.c 2019-04-08 10:20:58.248623425 -0600 @@ -342,6 +342,10 @@ static int max_part = 1; module_param(max_part, int, 0444); MODULE_PARM_DESC(max_part, "Num Minors to reserve between devices"); +static int disable_512e = 0; +module_param(disable_512e, int, 0444); +MODULE_PARM_DESC(disable_512e, "Disable Logical 512e sector size"); + MODULE_LICENSE("GPL"); MODULE_ALIAS_BLOCKDEV_MAJOR(RAMDISK_MAJOR); MODULE_ALIAS("rd"); @@ -389,6 +393,10 @@ static struct brd_device *brd_alloc(int * is harmless) */ blk_queue_physical_block_size(brd->brd_queue, PAGE_SIZE); + + if (disable_512e) + blk_queue_logical_block_size(brd->brd_queue, PAGE_SIZE); + disk = brd->brd_disk = alloc_disk(max_part); if (!disk) goto out_free_queue;