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=-12.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 1FEFFC63699 for ; Fri, 13 Nov 2020 06:57:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A2528206D9 for ; Fri, 13 Nov 2020 06:57:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mykernel.net header.i=cgxu519@mykernel.net header.b="Lqm3x8zy" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726309AbgKMG5W (ORCPT ); Fri, 13 Nov 2020 01:57:22 -0500 Received: from sender2-op-o12.zoho.com.cn ([163.53.93.243]:17163 "EHLO sender2-op-o12.zoho.com.cn" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726301AbgKMG5V (ORCPT ); Fri, 13 Nov 2020 01:57:21 -0500 ARC-Seal: i=1; a=rsa-sha256; t=1605250629; cv=none; d=zoho.com.cn; s=zohoarc; b=cd/r+FdpqhCnKkX3xMu4TUI+spYTT1m+d2ggyzYzTDjcG4EuqMrWO+fj2ghAPYDWaDv25aCNKqguQQzMkHHuFegFRwF0Lpofqpiiq5fLDIU2R67vFtONETKN3ZITIGBxFF/5qD1tSDP2rRgDlAi/U7poG8loCurGfHPbSgw+8hU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com.cn; s=zohoarc; t=1605250629; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To; bh=Tlxw7j172mvgTwkWSXC4EiCFRBOcSo+hBBmaIMmXsg4=; b=h1RKBMbWqkthXkks2NHWKM0DvRwiYbQmnpEevia1bX1FD8deCJoilcKg4VjPTi8o9hzTgjSSG8YdblvaJW9lAU7WUlCx0OtjWe1PALgl4xwlrOp4so0ou1TSihaVeHxLl1VIeWlo0cLcbg/YOQiUMg/i7y6bINh40HqTqBzAcgM= ARC-Authentication-Results: i=1; mx.zoho.com.cn; dkim=pass header.i=mykernel.net; spf=pass smtp.mailfrom=cgxu519@mykernel.net; dmarc=pass header.from= header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1605250629; s=zohomail; d=mykernel.net; i=cgxu519@mykernel.net; h=From:To:Cc:Message-ID:Subject:Date:In-Reply-To:References:MIME-Version:Content-Transfer-Encoding:Content-Type; bh=Tlxw7j172mvgTwkWSXC4EiCFRBOcSo+hBBmaIMmXsg4=; b=Lqm3x8zyRHTSFas/hvciSYX5gMZI+EAVuJHUFG2+9T2ml0OFG5iApQLBbi4oZtwu sDqNtbkGQAGPF97RsmKUJ7Ot4lQ0LyY4pQXgvYS2yVHVp2W53c7EUMM0rPxZnVBZ65V l//3yMi3cBKbzbmJHMIrPea507V0laPOBGi/Tpbo= Received: from localhost.localdomain (116.30.195.173 [116.30.195.173]) by mx.zoho.com.cn with SMTPS id 1605250626771895.4721674647662; Fri, 13 Nov 2020 14:57:06 +0800 (CST) From: Chengguang Xu To: miklos@szeredi.hu, jack@suse.cz, amir73il@gmail.com Cc: linux-unionfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, Chengguang Xu Message-ID: <20201113065555.147276-7-cgxu519@mykernel.net> Subject: [RFC PATCH v4 6/9] ovl: implement overlayfs' ->write_inode operation Date: Fri, 13 Nov 2020 14:55:52 +0800 X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201113065555.147276-1-cgxu519@mykernel.net> References: <20201113065555.147276-1-cgxu519@mykernel.net> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoCNMailClient: External Content-Type: text/plain; charset=utf8 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Implement overlayfs' ->write_inode to sync dirty data and redirty overlayfs' inode if necessary. Signed-off-by: Chengguang Xu --- fs/overlayfs/super.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 883172ac8a12..82e001b97f38 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -390,6 +390,35 @@ static int ovl_remount(struct super_block *sb, int *fl= ags, char *data) =09return ret; } =20 +static int ovl_write_inode(struct inode *inode, +=09=09=09 struct writeback_control *wbc) +{ +=09struct ovl_fs *ofs =3D inode->i_sb->s_fs_info; +=09struct inode *upper =3D ovl_inode_upper(inode); +=09unsigned long iflag =3D 0; +=09int ret =3D 0; + +=09if (!upper) +=09=09return 0; + +=09if (!ovl_should_sync(ofs)) +=09=09return 0; + +=09if (upper->i_sb->s_op->write_inode) +=09=09ret =3D upper->i_sb->s_op->write_inode(inode, wbc); + +=09if (mapping_writably_mapped(upper->i_mapping) || +=09 mapping_tagged(upper->i_mapping, PAGECACHE_TAG_WRITEBACK)) +=09=09iflag |=3D I_DIRTY_PAGES; + +=09iflag |=3D upper->i_state & I_DIRTY_ALL; + +=09if (iflag) +=09=09ovl_mark_inode_dirty(inode); + +=09return ret; +} + static void ovl_evict_inode(struct inode *inode) { =09inode->i_state &=3D ~I_DIRTY_ALL; @@ -402,6 +431,7 @@ static const struct super_operations ovl_super_operatio= ns =3D { =09.destroy_inode=09=3D ovl_destroy_inode, =09.drop_inode=09=3D generic_delete_inode, =09.evict_inode=09=3D ovl_evict_inode, +=09.write_inode=09=3D ovl_write_inode, =09.put_super=09=3D ovl_put_super, =09.sync_fs=09=3D ovl_sync_fs, =09.statfs=09=09=3D ovl_statfs, --=20 2.26.2