From patchwork Wed Aug 14 13:48:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chao Yu X-Patchwork-Id: 13763511 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 lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 36211C52D7B for ; Wed, 14 Aug 2024 13:48:44 +0000 (UTC) Received: from [127.0.0.1] (helo=sfs-ml-4.v29.lw.sourceforge.com) by sfs-ml-4.v29.lw.sourceforge.com with esmtp (Exim 4.95) (envelope-from ) id 1seEMk-0006cr-8V; Wed, 14 Aug 2024 13:48:42 +0000 Received: from [172.30.29.66] (helo=mx.sourceforge.net) by sfs-ml-4.v29.lw.sourceforge.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1seEMi-0006cl-ES for linux-f2fs-devel@lists.sourceforge.net; Wed, 14 Aug 2024 13:48:40 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Transfer-Encoding:MIME-Version:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=WDlpJHA17VbVcj/5/KFD30uoW08xvAC1hTf5oYRgX60=; b=LRH+am+EcFeQKW5k67AlQQq7py jCZjdlvnDhbBcIztW0TpLkTUxSTSe/tGnoynwi3d8h/3fNnrMF+Rd/YPwvS0HtL1UR+47ntzz9Cgx 7MxpgM51SgtRnWt+w7ROx4Wc6mghJnvOfK7NqHkqOtAh6fckGeg8HJI/1doZ+3ymLOLA=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Transfer-Encoding:MIME-Version:Message-Id:Date:Subject:Cc:To:From :Sender:Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Id:List-Help:List-Unsubscribe:List-Subscribe:List-Post: List-Owner:List-Archive; bh=WDlpJHA17VbVcj/5/KFD30uoW08xvAC1hTf5oYRgX60=; b=S BM0RqqWjhvtZaV5Q4ZFHjVQXrMJPPs5WWqGOwedpSETX5ZMUb05d6hjs74N9I2jUJPFQ+zIo2Rxjj 3Db1q1i8ndcm64wU0fraksshUiZLabJoBNMcwtqbumQo68Fu8WiGZBx40oFWki8FxOsw2QQo/iN6p BHKVT9iuChvGlR9w=; Received: from dfw.source.kernel.org ([139.178.84.217]) by sfi-mx-2.v28.lw.sourceforge.com with esmtps (TLS1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.95) id 1seEMh-0002B3-LR for linux-f2fs-devel@lists.sourceforge.net; Wed, 14 Aug 2024 13:48:40 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 4DC7761A5F for ; Wed, 14 Aug 2024 13:48:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6D5FC32786; Wed, 14 Aug 2024 13:48:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1723643309; bh=TV7e8O5Dp1Ln1kyoeo3xPcNmajK9Di/HeAdWJnXc+QE=; h=From:To:Cc:Subject:Date:From; b=hrvbRPMYY3E1N+RGXO5pT93z20i48atFAcLwYJTvO+k9i9dN4KGN1vRzX5gZ5OBDM F9KhGZ853eIhSAo/2NvBr952pzUCO6t31S3qZfp7BHbHsDyEuqoQjN2t6z7j501yi3 dRiuXZVu5vKhQ/QQ/HHW9oOFd9TRqBCFZy30LoMzYsZbxD/qwchaXi6Q1PsHu4OiEt s2Ji+0yXTi134fOcybzSmERgTV2aMNJujQA9CGKeffHbRJAowyuDdU4eg1qHOUaFgj QWPt47JfizVwcIYraEjOoGA8NAv0wffnwWaC65NxRURZzLK317eAukCFzH5lS8K03I wVdMemaiwsCMQ== From: Chao Yu To: jaegeuk@kernel.org Date: Wed, 14 Aug 2024 21:48:15 +0800 Message-Id: <20240814134815.801303-1-chao@kernel.org> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 X-Headers-End: 1seEMh-0002B3-LR Subject: [f2fs-dev] [PATCH v2 2/4] f2fs: atomic: fix to not allow GC to pollute atomic_file X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net SQLite App GC Thread Shrinker - f2fs_ioc_start_atomic_write - f2fs_ioc_commit_atomic_write - f2fs_commit_atomic_write - filemap_write_and_wait_range : write atomic_file's data to cow_inode echo 3 > drop_caches - f2fs_gc - gc_data_segment - move_data_page - set_page_dirty : it may load data of previous transaction into pagecache. - f2fs_down_write(&fi->i_gc_rwsem[WRITE]) - __f2fs_commit_atomic_write - f2fs_up_write(&fi->i_gc_rwsem[WRITE]) During committing atomic_file, GC may be triggered to migrate atomic_file's block, so it may contain data of previous transaction in page cache, we should drop atomic_file's cache once it was migrated by GC. And also, we should writeback atomic_file and cow_file's data w/ i_gc_rwsem lock held, in order to avoid block address change during __f2fs_commit_atomic_write(). Meahwhile, this patch adds f2fs_wait_on_block_writeback_range() to wait completion of block migration. Fixes: 3db1de0e582c ("f2fs: change the current atomic write way") Signed-off-by: Chao Yu --- v2: - fix error path handling. fs/f2fs/segment.c | 27 +++++++++++++++++++++++---- 1 file changed, 23 insertions(+), 4 deletions(-) diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 3aee71c9f3c6..a43054ab0cf1 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -236,6 +236,9 @@ static int __replace_atomic_write_block(struct inode *inode, pgoff_t index, return err; } + if (__is_valid_data_blkaddr(dn.data_blkaddr)) + f2fs_wait_on_block_writeback_range(inode, dn.data_blkaddr, 1); + if (recover) { /* dn.data_blkaddr is always valid */ if (!__is_valid_data_blkaddr(new_addr)) { @@ -339,6 +342,9 @@ static int __f2fs_commit_atomic_write(struct inode *inode) goto out; } + f2fs_wait_on_block_writeback_range(cow_inode, + blkaddr, 1); + new = f2fs_kmem_cache_alloc(revoke_entry_slab, GFP_NOFS, true, NULL); @@ -379,16 +385,29 @@ int f2fs_commit_atomic_write(struct inode *inode) struct f2fs_inode_info *fi = F2FS_I(inode); int err; + f2fs_down_write(&fi->i_gc_rwsem[WRITE]); + err = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX); if (err) - return err; + goto out; - f2fs_down_write(&fi->i_gc_rwsem[WRITE]); - f2fs_lock_op(sbi); + /* writeback GCing page of cow_inode */ + err = filemap_write_and_wait_range(fi->cow_inode->i_mapping, + 0, LLONG_MAX); + if (err) + goto out; - err = __f2fs_commit_atomic_write(inode); + filemap_invalidate_lock(inode->i_mapping); + + /* don't allow clean page loaded by GC to pollute atomic_file */ + truncate_pagecache(inode, 0); + f2fs_lock_op(sbi); + err = __f2fs_commit_atomic_write(inode); f2fs_unlock_op(sbi); + + filemap_invalidate_unlock(inode->i_mapping); +out: f2fs_up_write(&fi->i_gc_rwsem[WRITE]); return err;