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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 23081C35643 for ; Fri, 21 Feb 2020 07:44:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EAE9624673 for ; Fri, 21 Feb 2020 07:44:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582271050; bh=D4GG98E9c9Y1icIuu9/OOXLVnOGJq8xtVvyjOWugdBc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ERyVMyDCmmxcUJUXgwQ2KWw6FONW42Y4sXWfhjLaNnF6sxYsYVtAMC4eMMgXh91yI xN1GHME76Hsh0GPNrWORhX7ajo4XPOX9HICujDznq0rQ45jAtYUBWUV2vyGqU9ADSZ XFL5b8b/ScNbSy6YIszv/anyYlhiFw83gMHHiqCA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727742AbgBUHoI (ORCPT ); Fri, 21 Feb 2020 02:44:08 -0500 Received: from mail.kernel.org ([198.145.29.99]:38658 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727683AbgBUHoE (ORCPT ); Fri, 21 Feb 2020 02:44:04 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 09F3B24672; Fri, 21 Feb 2020 07:44:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582271044; bh=D4GG98E9c9Y1icIuu9/OOXLVnOGJq8xtVvyjOWugdBc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KmDixRiS/rmKD3kPlZ6hPm0wxAJmGnsz0hUwL/wmlMkuazQO8bsfM4SGzQYMyVXz9 jOoEoGmYjcpqqO52QfUwOIF+vjkHWt5YZdkoUeobaEfXj70dBE2MjYO9btskIvBzZ7 W4zJncw/2RhiBdXwlVl7TBPD14tOxS9Y6RWxsBcA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Damien Le Moal , Shinichiro Kawasaki , Chao Yu , =?UTF-8?q?Javier=20Gonz=C3=A1lez?= , Jaegeuk Kim , Sasha Levin Subject: [PATCH 5.5 019/399] f2fs: preallocate DIO blocks when forcing buffered_io Date: Fri, 21 Feb 2020 08:35:44 +0100 Message-Id: <20200221072404.185975701@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200221072402.315346745@linuxfoundation.org> References: <20200221072402.315346745@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jaegeuk Kim [ Upstream commit 47501f87c61ad2aa234add63e1ae231521dbc3f5 ] The previous preallocation and DIO decision like below. allow_outplace_dio !allow_outplace_dio f2fs_force_buffered_io (*) No_Prealloc / Buffered_IO Prealloc / Buffered_IO !f2fs_force_buffered_io No_Prealloc / DIO Prealloc / DIO But, Javier reported Case (*) where zoned device bypassed preallocation but fell back to buffered writes in f2fs_direct_IO(), resulting in stale data being read. In order to fix the issue, actually we need to preallocate blocks whenever we fall back to buffered IO like this. No change is made in the other cases. allow_outplace_dio !allow_outplace_dio f2fs_force_buffered_io (*) Prealloc / Buffered_IO Prealloc / Buffered_IO !f2fs_force_buffered_io No_Prealloc / DIO Prealloc / DIO Reported-and-tested-by: Javier Gonzalez Signed-off-by: Damien Le Moal Tested-by: Shin'ichiro Kawasaki Reviewed-by: Chao Yu Reviewed-by: Javier González Signed-off-by: Jaegeuk Kim Signed-off-by: Sasha Levin --- fs/f2fs/data.c | 13 ------------- fs/f2fs/file.c | 43 +++++++++++++++++++++++++++++++++---------- 2 files changed, 33 insertions(+), 23 deletions(-) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index a034cd0ce0217..fc40a72f7827f 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -1180,19 +1180,6 @@ int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) int err = 0; bool direct_io = iocb->ki_flags & IOCB_DIRECT; - /* convert inline data for Direct I/O*/ - if (direct_io) { - err = f2fs_convert_inline_inode(inode); - if (err) - return err; - } - - if (direct_io && allow_outplace_dio(inode, iocb, from)) - return 0; - - if (is_inode_flag_set(inode, FI_NO_PREALLOC)) - return 0; - map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from)); if (map.m_len > map.m_lblk) diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 13aef5f28fa8f..33c412d178f0f 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -3383,18 +3383,41 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) ret = -EAGAIN; goto out; } - } else { - preallocated = true; - target_size = iocb->ki_pos + iov_iter_count(from); + goto write; + } - err = f2fs_preallocate_blocks(iocb, from); - if (err) { - clear_inode_flag(inode, FI_NO_PREALLOC); - inode_unlock(inode); - ret = err; - goto out; - } + if (is_inode_flag_set(inode, FI_NO_PREALLOC)) + goto write; + + if (iocb->ki_flags & IOCB_DIRECT) { + /* + * Convert inline data for Direct I/O before entering + * f2fs_direct_IO(). + */ + err = f2fs_convert_inline_inode(inode); + if (err) + goto out_err; + /* + * If force_buffere_io() is true, we have to allocate + * blocks all the time, since f2fs_direct_IO will fall + * back to buffered IO. + */ + if (!f2fs_force_buffered_io(inode, iocb, from) && + allow_outplace_dio(inode, iocb, from)) + goto write; + } + preallocated = true; + target_size = iocb->ki_pos + iov_iter_count(from); + + err = f2fs_preallocate_blocks(iocb, from); + if (err) { +out_err: + clear_inode_flag(inode, FI_NO_PREALLOC); + inode_unlock(inode); + ret = err; + goto out; } +write: ret = __generic_file_write_iter(iocb, from); clear_inode_flag(inode, FI_NO_PREALLOC); -- 2.20.1