From patchwork Mon Feb 17 18:16:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Goyal X-Patchwork-Id: 11387161 X-Patchwork-Delegate: snitzer@redhat.com Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6A4D4924 for ; Mon, 17 Feb 2020 18:17:29 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 278C7207FD for ; Mon, 17 Feb 2020 18:17:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="YJBBCdSD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 278C7207FD Authentication-Results: mail.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=dm-devel-bounces@redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1581963448; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post; bh=oqZcSApG7NlJb00W41dykJ8c9DP1hKigZsJaVs5cWvM=; b=YJBBCdSD7EG+YhFoQ99KhRB+Uw0oPCNVPIliaeFdZiFyExhu7/jUe4aHcvjmS6sDDy20Z8 ayBlfaG03ZOJKhzOB5m3NITR4tD3y5rT1T4n0E7qdVMh+9Cm+SPP9Z1sY+FvRFPnw1Zxri 2XPhZ4SWh/bWdtIsOur0rr9Lpeu+g8A= 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-218-0BDm51zKMcuyPI96yGvoAw-1; Mon, 17 Feb 2020 13:17:25 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6A357107ACCD; Mon, 17 Feb 2020 18:17:20 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 433F187056; Mon, 17 Feb 2020 18:17:20 +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 EF90C18089CF; Mon, 17 Feb 2020 18:17:19 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id 01HIHCkN022286 for ; Mon, 17 Feb 2020 13:17:12 -0500 Received: by smtp.corp.redhat.com (Postfix) id 0670E60C80; Mon, 17 Feb 2020 18:17:12 +0000 (UTC) Delivered-To: dm-devel@redhat.com Received: from horse.redhat.com (unknown [10.18.25.35]) by smtp.corp.redhat.com (Postfix) with ESMTP id D6C9360BE1; Mon, 17 Feb 2020 18:17:11 +0000 (UTC) Received: by horse.redhat.com (Postfix, from userid 10451) id 20D4A2257D9; Mon, 17 Feb 2020 13:17:08 -0500 (EST) From: Vivek Goyal To: linux-fsdevel@vger.kernel.org, linux-nvdimm@lists.01.org, hch@infradead.org, dan.j.williams@intel.com Date: Mon, 17 Feb 2020 13:16:53 -0500 Message-Id: <20200217181653.4706-8-vgoyal@redhat.com> In-Reply-To: <20200217181653.4706-1-vgoyal@redhat.com> References: <20200217181653.4706-1-vgoyal@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-loop: dm-devel@redhat.com Cc: vishal.l.verma@intel.com, dm-devel@redhat.com, Christoph Hellwig , vgoyal@redhat.com Subject: [dm-devel] [PATCH v4 7/7] dax, iomap: Add helper dax_iomap_zero() to zero a range 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 10.5.11.15 X-MC-Unique: 0BDm51zKMcuyPI96yGvoAw-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Add a helper dax_ioamp_zero() to zero a range. This patch basically merges __dax_zero_page_range() and iomap_dax_zero(). Suggested-by: Christoph Hellwig Reviewed-by: Christoph Hellwig Signed-off-by: Vivek Goyal --- fs/dax.c | 12 ++++++------ fs/iomap/buffered-io.c | 9 +-------- include/linux/dax.h | 17 +++-------------- 3 files changed, 10 insertions(+), 28 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index 6757e12b86b2..f6c4788ba764 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -1044,23 +1044,23 @@ static vm_fault_t dax_load_hole(struct xa_state *xas, return ret; } -int __dax_zero_page_range(struct block_device *bdev, - struct dax_device *dax_dev, sector_t sector, - unsigned int offset, unsigned int size) +int dax_iomap_zero(loff_t pos, unsigned offset, unsigned size, + struct iomap *iomap) { pgoff_t pgoff; long rc, id; + sector_t sector = iomap_sector(iomap, pos & PAGE_MASK); - rc = bdev_dax_pgoff(bdev, sector, PAGE_SIZE, &pgoff); + rc = bdev_dax_pgoff(iomap->bdev, sector, PAGE_SIZE, &pgoff); if (rc) return rc; id = dax_read_lock(); - rc = dax_zero_page_range(dax_dev, (pgoff << PAGE_SHIFT) + offset, size); + rc = dax_zero_page_range(iomap->dax_dev, (pgoff << PAGE_SHIFT) + offset, + size); dax_read_unlock(id); return rc; } -EXPORT_SYMBOL_GPL(__dax_zero_page_range); static loff_t dax_iomap_actor(struct inode *inode, loff_t pos, loff_t length, void *data, diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 7c84c4c027c4..6f750da545e5 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -974,13 +974,6 @@ static int iomap_zero(struct inode *inode, loff_t pos, unsigned offset, return iomap_write_end(inode, pos, bytes, bytes, page, iomap, srcmap); } -static int iomap_dax_zero(loff_t pos, unsigned offset, unsigned bytes, - struct iomap *iomap) -{ - return __dax_zero_page_range(iomap->bdev, iomap->dax_dev, - iomap_sector(iomap, pos & PAGE_MASK), offset, bytes); -} - static loff_t iomap_zero_range_actor(struct inode *inode, loff_t pos, loff_t count, void *data, struct iomap *iomap, struct iomap *srcmap) @@ -1000,7 +993,7 @@ iomap_zero_range_actor(struct inode *inode, loff_t pos, loff_t count, bytes = min_t(loff_t, PAGE_SIZE - offset, count); if (IS_DAX(inode)) - status = iomap_dax_zero(pos, offset, bytes, iomap); + status = dax_iomap_zero(pos, offset, bytes, iomap); else status = iomap_zero(inode, pos, offset, bytes, iomap, srcmap); diff --git a/include/linux/dax.h b/include/linux/dax.h index a555f0aeb7bd..31d0e6fc3023 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -13,6 +13,7 @@ typedef unsigned long dax_entry_t; struct iomap_ops; +struct iomap; struct dax_device; struct dax_operations { /* @@ -223,20 +224,8 @@ vm_fault_t dax_finish_sync_fault(struct vm_fault *vmf, int dax_delete_mapping_entry(struct address_space *mapping, pgoff_t index); int dax_invalidate_mapping_entry_sync(struct address_space *mapping, pgoff_t index); - -#ifdef CONFIG_FS_DAX -int __dax_zero_page_range(struct block_device *bdev, - struct dax_device *dax_dev, sector_t sector, - unsigned int offset, unsigned int length); -#else -static inline int __dax_zero_page_range(struct block_device *bdev, - struct dax_device *dax_dev, sector_t sector, - unsigned int offset, unsigned int length) -{ - return -ENXIO; -} -#endif - +int dax_iomap_zero(loff_t pos, unsigned offset, unsigned size, + struct iomap *iomap); static inline bool dax_mapping(struct address_space *mapping) { return mapping->host && IS_DAX(mapping->host);