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=-8.8 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 8B779C43613 for ; Thu, 20 Jun 2019 18:29:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 60DCB20675 for ; Thu, 20 Jun 2019 18:29:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561055382; bh=CuS6uZSJ7lgfSoK+W+xGUsXBrvbKOJRcbUYbcj8uS5c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=okHqGTv7dtYJAZA8KncAVxMjjPv9NJK5MAYsCIdUCL377ZN9dYcMCBHarkkKoAsQz t7p9SaWhX4AEBho8rWngj/amH2bIObsDWUv9xniQ+EG0FJoD4Ypk3i8a7LmOYxWxxg adnn1o7JF3shODQhXMAOttZZXpyk0SfBV7Lu2VtA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726655AbfFTS3i (ORCPT ); Thu, 20 Jun 2019 14:29:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:52748 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727418AbfFTSCU (ORCPT ); Thu, 20 Jun 2019 14:02:20 -0400 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 8D1932084A; Thu, 20 Jun 2019 18:02:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1561053740; bh=CuS6uZSJ7lgfSoK+W+xGUsXBrvbKOJRcbUYbcj8uS5c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GeOcTmw+vovFMsj5jM7KfT/96BCBT8jq1/4uH5JevaqBuGifPwU9jQu9bZAp1j87O rSjUl2Mg0n1jn4oClKL29Y+xTdJPLYxMwmElhDE2fYYBJU1pGb7rxApfhfb4ZFp+IP iYjHG7gY25l7myNUmVZDbrqimCu3qT2isacyER7w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hou Tao , OGAWA Hirofumi , Al Viro , Jan Kara , Andrew Morton , Linus Torvalds , Sasha Levin Subject: [PATCH 4.9 002/117] fs/fat/file.c: issue flush after the writeback of FAT Date: Thu, 20 Jun 2019 19:55:36 +0200 Message-Id: <20190620174352.105648515@linuxfoundation.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190620174351.964339809@linuxfoundation.org> References: <20190620174351.964339809@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit bd8309de0d60838eef6fb575b0c4c7e95841cf73 ] fsync() needs to make sure the data & meta-data of file are persistent after the return of fsync(), even when a power-failure occurs later. In the case of fat-fs, the FAT belongs to the meta-data of file, so we need to issue a flush after the writeback of FAT instead before. Also bail out early when any stage of fsync fails. Link: http://lkml.kernel.org/r/20190409030158.136316-1-houtao1@huawei.com Signed-off-by: Hou Tao Acked-by: OGAWA Hirofumi Cc: Al Viro Cc: Jan Kara Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- fs/fat/file.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/fs/fat/file.c b/fs/fat/file.c index 3d04b124bce0..392ec5641f38 100644 --- a/fs/fat/file.c +++ b/fs/fat/file.c @@ -160,12 +160,17 @@ static int fat_file_release(struct inode *inode, struct file *filp) int fat_file_fsync(struct file *filp, loff_t start, loff_t end, int datasync) { struct inode *inode = filp->f_mapping->host; - int res, err; + int err; + + err = __generic_file_fsync(filp, start, end, datasync); + if (err) + return err; - res = generic_file_fsync(filp, start, end, datasync); err = sync_mapping_buffers(MSDOS_SB(inode->i_sb)->fat_inode->i_mapping); + if (err) + return err; - return res ? res : err; + return blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); } -- 2.20.1