From patchwork Mon Oct 18 04:40:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12565139 X-Patchwork-Delegate: snitzer@redhat.com 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9ABFEC433F5 for ; Mon, 18 Oct 2021 05:56:41 +0000 (UTC) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 0AE4260F48 for ; Mon, 18 Oct 2021 05:56:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 0AE4260F48 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=redhat.com Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-3-IZU-JT4eNeeV4ntrLgD7xA-1; Mon, 18 Oct 2021 01:56:36 -0400 X-MC-Unique: IZU-JT4eNeeV4ntrLgD7xA-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 71C61806668; Mon, 18 Oct 2021 05:56:32 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 55B6E5DA60; Mon, 18 Oct 2021 05:56:32 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 290504EA2F; Mon, 18 Oct 2021 05:56:32 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 19I5uUlh007965 for ; Mon, 18 Oct 2021 01:56:30 -0400 Received: by smtp.corp.redhat.com (Postfix) id 4985540CFD11; Mon, 18 Oct 2021 05:56:30 +0000 (UTC) Received: from mimecast-mx02.redhat.com (mimecast06.extmail.prod.ext.rdu2.redhat.com [10.11.55.22]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 4427840CFD0B for ; Mon, 18 Oct 2021 05:56:30 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-1.mimecast.com [205.139.110.61]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 2B634185A7A4 for ; Mon, 18 Oct 2021 05:56:30 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-362-UHcdBvEePv2ftPiQydTVZQ-1; Mon, 18 Oct 2021 01:56:28 -0400 X-MC-Unique: UHcdBvEePv2ftPiQydTVZQ-1 Received: from 089144211028.atnat0020.highway.a1.net ([89.144.211.28] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mcKSW-00E3IX-In; Mon, 18 Oct 2021 04:41:13 +0000 From: Christoph Hellwig To: Date: Mon, 18 Oct 2021 06:40:48 +0200 Message-Id: <20211018044054.1779424-6-hch@lst.de> In-Reply-To: <20211018044054.1779424-1-hch@lst.de> References: <20211018044054.1779424-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Mimecast-Impersonation-Protect: Policy=CLT - Impersonation Protection Definition; Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 X-loop: dm-devel@redhat.com Cc: nvdimm@lists.linux.dev, Mike Snitzer , linux-s390@vger.kernel.org, linux-erofs@lists.ozlabs.org, virtualization@lists.linux-foundation.org, linux-xfs@vger.kernel.org, dm-devel@redhat.com, linux-fsdevel@vger.kernel.org, Dan Williams , linux-ext4@vger.kernel.org, Ira Weiny Subject: [dm-devel] [PATCH 05/11] dax: move the partition alignment check into fs_dax_get_by_bdev X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com fs_dax_get_by_bdev is the primary interface to find a dax device for a block device, so move the partition alignment check there instead of wiring it up through ->dax_supported. Signed-off-by: Christoph Hellwig --- drivers/dax/super.c | 23 ++++++----------------- 1 file changed, 6 insertions(+), 17 deletions(-) diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 04fc680542e8d..482fe775324a4 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -93,6 +93,12 @@ struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev) if (!blk_queue_dax(bdev->bd_disk->queue)) return NULL; + if ((get_start_sect(bdev) * SECTOR_SIZE) % PAGE_SIZE || + (bdev_nr_sectors(bdev) * SECTOR_SIZE) % PAGE_SIZE) { + pr_info("%pg: error: unaligned partition for dax\n", bdev); + return NULL; + } + id = dax_read_lock(); dax_dev = xa_load(&dax_hosts, (unsigned long)bdev->bd_disk); if (!dax_dev || !dax_alive(dax_dev) || !igrab(&dax_dev->inode)) @@ -107,10 +113,6 @@ bool generic_fsdax_supported(struct dax_device *dax_dev, struct block_device *bdev, int blocksize, sector_t start, sector_t sectors) { - pgoff_t pgoff, pgoff_end; - sector_t last_page; - int err; - if (blocksize != PAGE_SIZE) { pr_info("%pg: error: unsupported blocksize for dax\n", bdev); return false; @@ -121,19 +123,6 @@ bool generic_fsdax_supported(struct dax_device *dax_dev, return false; } - err = bdev_dax_pgoff(bdev, start, PAGE_SIZE, &pgoff); - if (err) { - pr_info("%pg: error: unaligned partition for dax\n", bdev); - return false; - } - - last_page = PFN_DOWN((start + sectors - 1) * 512) * PAGE_SIZE / 512; - err = bdev_dax_pgoff(bdev, last_page, PAGE_SIZE, &pgoff_end); - if (err) { - pr_info("%pg: error: unaligned partition for dax\n", bdev); - return false; - } - return true; } EXPORT_SYMBOL_GPL(generic_fsdax_supported);