From patchwork Tue Jun 26 17:59:31 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ross Zwisler X-Patchwork-Id: 10489957 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 457906023A for ; Tue, 26 Jun 2018 18:00:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3C9C9286F5 for ; Tue, 26 Jun 2018 18:00:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 30BED28726; Tue, 26 Jun 2018 18:00:36 +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=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable 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 D8416286F5 for ; Tue, 26 Jun 2018 18:00:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933995AbeFZSAZ (ORCPT ); Tue, 26 Jun 2018 14:00:25 -0400 Received: from mga07.intel.com ([134.134.136.100]:23718 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754813AbeFZR7g (ORCPT ); Tue, 26 Jun 2018 13:59:36 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Jun 2018 10:59:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,275,1526367600"; d="scan'208";a="50086622" Received: from theros.lm.intel.com ([10.232.112.164]) by fmsmga007.fm.intel.com with ESMTP; 26 Jun 2018 10:59:35 -0700 From: Ross Zwisler To: Toshi Kani , Mike Snitzer , dm-devel@redhat.com Cc: Ross Zwisler , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org, linux-xfs@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH v3 2/3] dax: bdev_dax_supported() check for QUEUE_FLAG_DAX Date: Tue, 26 Jun 2018 11:59:31 -0600 Message-Id: <20180626175932.8899-3-ross.zwisler@linux.intel.com> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20180626175932.8899-1-ross.zwisler@linux.intel.com> References: <20180626175932.8899-1-ross.zwisler@linux.intel.com> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add an explicit check for QUEUE_FLAG_DAX to __bdev_dax_supported(). This is needed for DM configurations where the first element in the dm-linear or dm-stripe target supports DAX, but other elements do not. Without this check __bdev_dax_supported() will pass for such devices, letting a filesystem on that device mount with the DAX option. Signed-off-by: Ross Zwisler Suggested-by: Mike Snitzer Cc: stable@vger.kernel.org --- drivers/dax/super.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 903d9c473749..45276abf03aa 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -86,6 +86,7 @@ bool __bdev_dax_supported(struct block_device *bdev, int blocksize) { struct dax_device *dax_dev; bool dax_enabled = false; + struct request_queue *q; pgoff_t pgoff; int err, id; void *kaddr; @@ -99,6 +100,13 @@ bool __bdev_dax_supported(struct block_device *bdev, int blocksize) return false; } + q = bdev_get_queue(bdev); + if (!q || !blk_queue_dax(q)) { + pr_debug("%s: error: request queue doesn't support dax\n", + bdevname(bdev, buf)); + return false; + } + err = bdev_dax_pgoff(bdev, 0, PAGE_SIZE, &pgoff); if (err) { pr_debug("%s: error: unaligned partition for dax\n",