From patchwork Tue Oct 19 06:25:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12568715 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 97D39C433EF for ; Tue, 19 Oct 2021 06:26:29 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 66DA360230 for ; Tue, 19 Oct 2021 06:26:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 66DA360230 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.212677.370707 (Exim 4.92) (envelope-from ) id 1mciZp-0003X9-Tz; Tue, 19 Oct 2021 06:26:21 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 212677.370707; Tue, 19 Oct 2021 06:26:21 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mciZp-0003WB-Q2; Tue, 19 Oct 2021 06:26:21 +0000 Received: by outflank-mailman (input) for mailman id 212677; Tue, 19 Oct 2021 06:26:19 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1mciZn-0000gN-SF for xen-devel@lists.xenproject.org; Tue, 19 Oct 2021 06:26:19 +0000 Received: from bombadil.infradead.org (unknown [2607:7c80:54:e::133]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 5c7c45c5-d2ad-41d1-9a12-3ab7ef7b8ef3; Tue, 19 Oct 2021 06:26:04 +0000 (UTC) Received: from 089144192247.atnat0001.highway.a1.net ([89.144.192.247] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1mciZS-000Hcl-En; Tue, 19 Oct 2021 06:25:59 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 5c7c45c5-d2ad-41d1-9a12-3ab7ef7b8ef3 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=cXQ4VmbpQdlaz9Fmo/lMgXjRxPhGL2zNDx/ooEcOzSQ=; b=qUTsTibTDXkcY0Wb1gT1F8+GEQ wThkDWhya9HN4InkMFj6QODhitCXAaG/43QDQBJ6U3Fjp4vXx/IrMkQsiFzv2I8fLXPbwN0m3O8kW 3y7sg+bvGJtDcnCctC1+jyXAR6zOLHW5NymOTgpEIeyeU8hCKHAFl5CJ0tdM5s16vvXAFwon35s8K gp66mA7cqSS2glu+vSh0xXVKc2bPlHL76YfAPqxfQJhxNi76HMGaYQK5ux9u/m+BsPWuIMULAfEeH 2uYBjIGbGcMJNj/6YH0HrNfPDFNiBtgXp0j7i6zOLjoJnC3x4oA3ZJcRyztZ5rOI3ll6ebCYToKg6 5IoYE03A==; From: Christoph Hellwig To: Jens Axboe Cc: =?utf-8?q?Roger_Pau_Monn=C3=A9?= , Josef Bacik , David Sterba , OGAWA Hirofumi , Konstantin Komarov , linux-block@vger.kernel.org, xen-devel@lists.xenproject.org, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, ntfs3@lists.linux.dev Subject: [PATCH 7/7] block: simplify the block device syncing code Date: Tue, 19 Oct 2021 08:25:30 +0200 Message-Id: <20211019062530.2174626-8-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211019062530.2174626-1-hch@lst.de> References: <20211019062530.2174626-1-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 Get rid of the indirections and just provide a sync_bdevs helper for the generic sync code. Signed-off-by: Christoph Hellwig --- block/bdev.c | 17 ++++++++++++++--- fs/internal.h | 6 ------ fs/sync.c | 23 ++++------------------- include/linux/blkdev.h | 4 ++++ 4 files changed, 22 insertions(+), 28 deletions(-) diff --git a/block/bdev.c b/block/bdev.c index fe91209881730..3a8a753f970bb 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -1019,7 +1019,7 @@ int __invalidate_device(struct block_device *bdev, bool kill_dirty) } EXPORT_SYMBOL(__invalidate_device); -void iterate_bdevs(void (*func)(struct block_device *, void *), void *arg) +void sync_bdevs(bool wait) { struct inode *inode, *old_inode = NULL; @@ -1050,8 +1050,19 @@ void iterate_bdevs(void (*func)(struct block_device *, void *), void *arg) bdev = I_BDEV(inode); mutex_lock(&bdev->bd_disk->open_mutex); - if (bdev->bd_openers) - func(bdev, arg); + if (!bdev->bd_openers) { + ; /* skip */ + } else if (wait) { + /* + * We keep the error status of individual mapping so + * that applications can catch the writeback error using + * fsync(2). See filemap_fdatawait_keep_errors() for + * details. + */ + filemap_fdatawait_keep_errors(inode->i_mapping); + } else { + filemap_fdatawrite(inode->i_mapping); + } mutex_unlock(&bdev->bd_disk->open_mutex); spin_lock(&blockdev_superblock->s_inode_list_lock); diff --git a/fs/internal.h b/fs/internal.h index b5caa16f4645d..cdd83d4899bb3 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -23,17 +23,11 @@ struct pipe_inode_info; #ifdef CONFIG_BLOCK extern void __init bdev_cache_init(void); -void iterate_bdevs(void (*)(struct block_device *, void *), void *); void emergency_thaw_bdev(struct super_block *sb); #else static inline void bdev_cache_init(void) { } - -static inline void iterate_bdevs(void (*f)(struct block_device *, void *), - void *arg) -{ -} static inline int emergency_thaw_bdev(struct super_block *sb) { return 0; diff --git a/fs/sync.c b/fs/sync.c index a621089eb07ee..3ce8e2137f310 100644 --- a/fs/sync.c +++ b/fs/sync.c @@ -78,21 +78,6 @@ static void sync_fs_one_sb(struct super_block *sb, void *arg) sb->s_op->sync_fs(sb, *(int *)arg); } -static void fdatawrite_one_bdev(struct block_device *bdev, void *arg) -{ - filemap_fdatawrite(bdev->bd_inode->i_mapping); -} - -static void fdatawait_one_bdev(struct block_device *bdev, void *arg) -{ - /* - * We keep the error status of individual mapping so that - * applications can catch the writeback error using fsync(2). - * See filemap_fdatawait_keep_errors() for details. - */ - filemap_fdatawait_keep_errors(bdev->bd_inode->i_mapping); -} - /* * Sync everything. We start by waking flusher threads so that most of * writeback runs on all devices in parallel. Then we sync all inodes reliably @@ -111,8 +96,8 @@ void ksys_sync(void) iterate_supers(sync_inodes_one_sb, NULL); iterate_supers(sync_fs_one_sb, &nowait); iterate_supers(sync_fs_one_sb, &wait); - iterate_bdevs(fdatawrite_one_bdev, NULL); - iterate_bdevs(fdatawait_one_bdev, NULL); + sync_bdevs(false); + sync_bdevs(true); if (unlikely(laptop_mode)) laptop_sync_completion(); } @@ -133,10 +118,10 @@ static void do_sync_work(struct work_struct *work) */ iterate_supers(sync_inodes_one_sb, &nowait); iterate_supers(sync_fs_one_sb, &nowait); - iterate_bdevs(fdatawrite_one_bdev, NULL); + sync_bdevs(false); iterate_supers(sync_inodes_one_sb, &nowait); iterate_supers(sync_fs_one_sb, &nowait); - iterate_bdevs(fdatawrite_one_bdev, NULL); + sync_bdevs(false); printk("Emergency Sync complete\n"); kfree(work); } diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 67a3b9e04233f..4bb9c621e0ac3 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1286,6 +1286,7 @@ int truncate_bdev_range(struct block_device *bdev, fmode_t mode, loff_t lstart, void invalidate_bdev(struct block_device *bdev); int sync_blockdev(struct block_device *bdev); int sync_blockdev_nowait(struct block_device *bdev); +void sync_bdevs(bool wait); #else static inline void invalidate_bdev(struct block_device *bdev) { @@ -1298,6 +1299,9 @@ static inline int sync_blockdev_nowait(struct block_device *bdev) { return 0; } +static inline void sync_bdevs(bool wait) +{ +} #endif int fsync_bdev(struct block_device *bdev);