From patchwork Wed May 15 19:26:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Goyal X-Patchwork-Id: 10945249 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 070306C5 for ; Wed, 15 May 2019 19:31:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ECF8A28947 for ; Wed, 15 May 2019 19:31:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E1A9428922; Wed, 15 May 2019 19:31:18 +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 6FA87288E6 for ; Wed, 15 May 2019 19:31:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728101AbfEOTa5 (ORCPT ); Wed, 15 May 2019 15:30:57 -0400 Received: from mx1.redhat.com ([209.132.183.28]:49836 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726124AbfEOT1d (ORCPT ); Wed, 15 May 2019 15:27:33 -0400 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 1999230001DA; Wed, 15 May 2019 19:27:33 +0000 (UTC) Received: from horse.redhat.com (unknown [10.18.25.29]) by smtp.corp.redhat.com (Postfix) with ESMTP id EA71B1001DE1; Wed, 15 May 2019 19:27:32 +0000 (UTC) Received: by horse.redhat.com (Postfix, from userid 10451) id B7996225481; Wed, 15 May 2019 15:27:29 -0400 (EDT) From: Vivek Goyal To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-nvdimm@lists.01.org Cc: vgoyal@redhat.com, miklos@szeredi.hu, stefanha@redhat.com, dgilbert@redhat.com, swhiteho@redhat.com Subject: [PATCH v2 13/30] dax: Pass dax_dev to dax_writeback_mapping_range() Date: Wed, 15 May 2019 15:26:58 -0400 Message-Id: <20190515192715.18000-14-vgoyal@redhat.com> In-Reply-To: <20190515192715.18000-1-vgoyal@redhat.com> References: <20190515192715.18000-1-vgoyal@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.46]); Wed, 15 May 2019 19:27:33 +0000 (UTC) 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 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. 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 815bc32fd967..c944c1efc78f 100644 --- a/fs/dax.c +++ b/fs/dax.c @@ -932,12 +932,12 @@ 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; @@ -948,9 +948,12 @@ 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); @@ -972,7 +975,8 @@ 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 c27c27300d95..9b0131c53429 100644 --- a/fs/ext2/inode.c +++ b/fs/ext2/inode.c @@ -956,7 +956,7 @@ 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 b32a57bc5d5d..cb8cf5eddd9b 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -2972,7 +2972,7 @@ 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 3619e9e8d359..27f71ff55096 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -994,7 +994,7 @@ 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 0dd316a74a29..bf3b00b5f0bf 100644 --- a/include/linux/dax.h +++ b/include/linux/dax.h @@ -87,7 +87,8 @@ 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); @@ -119,7 +120,8 @@ 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; }