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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 0E2E8C3A59E for ; Wed, 21 Aug 2019 17:59:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DCCA82082F for ; Wed, 21 Aug 2019 17:59:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728437AbfHUR7I (ORCPT ); Wed, 21 Aug 2019 13:59:08 -0400 Received: from mx1.redhat.com ([209.132.183.28]:13173 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727255AbfHUR5i (ORCPT ); Wed, 21 Aug 2019 13:57:38 -0400 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 mx1.redhat.com (Postfix) with ESMTPS id D8810898107; Wed, 21 Aug 2019 17:57:37 +0000 (UTC) Received: from horse.redhat.com (unknown [10.18.25.158]) by smtp.corp.redhat.com (Postfix) with ESMTP id F40A217CFD; Wed, 21 Aug 2019 17:57:32 +0000 (UTC) Received: by horse.redhat.com (Postfix, from userid 10451) id 80E67223CFE; Wed, 21 Aug 2019 13:57:32 -0400 (EDT) From: Vivek Goyal To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org Cc: virtio-fs@redhat.com, vgoyal@redhat.com, miklos@szeredi.hu, stefanha@redhat.com, dgilbert@redhat.com, Dan Williams Subject: [PATCH 02/19] dax: Pass dax_dev to dax_writeback_mapping_range() Date: Wed, 21 Aug 2019 13:57:03 -0400 Message-Id: <20190821175720.25901-3-vgoyal@redhat.com> In-Reply-To: <20190821175720.25901-1-vgoyal@redhat.com> References: <20190821175720.25901-1-vgoyal@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.67]); Wed, 21 Aug 2019 17:57:37 +0000 (UTC) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Right now dax_writeback_mapping_range() is passed a bdev and dax_dev is searched from that bdev name. virtio-fs does not have a bdev. So pass in dax_dev also to dax_writeback_mapping_range(). If dax_dev is passed in, bdev is not used otherwise dax_dev is searched using bdev. Cc: Dan Williams Signed-off-by: Vivek Goyal --- fs/dax.c | 16 ++++++++++------ fs/ext2/inode.c | 2 +- fs/ext4/inode.c | 2 +- fs/xfs/xfs_aops.c | 2 +- include/linux/dax.h | 6 ++++-- 5 files changed, 17 insertions(+), 11 deletions(-) diff --git a/fs/dax.c b/fs/dax.c index a11147bbaf9e..60620a37030c 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -936,12 +936,12 @@ static int dax_writeback_one(struct xa_state *xas, struct dax_device *dax_dev, * on persistent storage prior to completion of the operation. */ int dax_writeback_mapping_range(struct address_space *mapping, - struct block_device *bdev, struct writeback_control *wbc) + struct block_device *bdev, struct dax_device *dax_dev, + struct writeback_control *wbc) { XA_STATE(xas, &mapping->i_pages, wbc->range_start >> PAGE_SHIFT); struct inode *inode = mapping->host; pgoff_t end_index = wbc->range_end >> PAGE_SHIFT; - struct dax_device *dax_dev; void *entry; int ret = 0; unsigned int scanned = 0; @@ -952,9 +952,12 @@ int dax_writeback_mapping_range(struct address_space *mapping, if (!mapping->nrexceptional || wbc->sync_mode != WB_SYNC_ALL) return 0; - dax_dev = dax_get_by_host(bdev->bd_disk->disk_name); - if (!dax_dev) - return -EIO; + if (bdev) { + WARN_ON(dax_dev); + dax_dev = dax_get_by_host(bdev->bd_disk->disk_name); + if (!dax_dev) + return -EIO; + } trace_dax_writeback_range(inode, xas.xa_index, end_index); @@ -976,7 +979,8 @@ int dax_writeback_mapping_range(struct address_space *mapping, xas_lock_irq(&xas); } xas_unlock_irq(&xas); - put_dax(dax_dev); + if (bdev) + put_dax(dax_dev); trace_dax_writeback_range_done(inode, xas.xa_index, end_index); return ret; } diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c index 7004ce581a32..4e3870c4e255 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -958,7 +958,7 @@ static int ext2_dax_writepages(struct address_space *mapping, struct writeback_control *wbc) { return dax_writeback_mapping_range(mapping, - mapping->host->i_sb->s_bdev, wbc); + mapping->host->i_sb->s_bdev, NULL, wbc); } const struct address_space_operations ext2_aops = { diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 420fe3deed39..75b85c56c732 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -2992,7 +2992,7 @@ static int ext4_dax_writepages(struct address_space *mapping, percpu_down_read(&sbi->s_journal_flag_rwsem); trace_ext4_writepages(inode, wbc); - ret = dax_writeback_mapping_range(mapping, inode->i_sb->s_bdev, wbc); + ret = dax_writeback_mapping_range(mapping, inode->i_sb->s_bdev, NULL, wbc); trace_ext4_writepages_result(inode, wbc, ret, nr_to_write - wbc->nr_to_write); percpu_up_read(&sbi->s_journal_flag_rwsem); diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index f16d5f196c6b..71a7007509c4 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -1120,7 +1120,7 @@ xfs_dax_writepages( { xfs_iflags_clear(XFS_I(mapping->host), XFS_ITRUNCATED); return dax_writeback_mapping_range(mapping, - xfs_find_bdev_for_inode(mapping->host), wbc); + xfs_find_bdev_for_inode(mapping->host), NULL, wbc); } STATIC int diff --git a/include/linux/dax.h b/include/linux/dax.h index 9bd8528bd305..e7f40108f2c9 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -141,7 +141,8 @@ static inline void fs_put_dax(struct dax_device *dax_dev) struct dax_device *fs_dax_get_by_bdev(struct block_device *bdev); int dax_writeback_mapping_range(struct address_space *mapping, - struct block_device *bdev, struct writeback_control *wbc); + struct block_device *bdev, struct dax_device *dax_dev, + struct writeback_control *wbc); struct page *dax_layout_busy_page(struct address_space *mapping); dax_entry_t dax_lock_page(struct page *page); @@ -180,7 +181,8 @@ static inline struct page *dax_layout_busy_page(struct address_space *mapping) } static inline int dax_writeback_mapping_range(struct address_space *mapping, - struct block_device *bdev, struct writeback_control *wbc) + struct block_device *bdev, struct dax_device *dax_dev, + struct writeback_control *wbc) { return -EOPNOTSUPP; } -- 2.20.1