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,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 3847EC61DD8 for ; Sun, 8 Nov 2020 14:04:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA117206F9 for ; Sun, 8 Nov 2020 14:04:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mykernel.net header.i=cgxu519@mykernel.net header.b="QYaPIrsV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728430AbgKHOEE (ORCPT ); Sun, 8 Nov 2020 09:04:04 -0500 Received: from sender2-op-o12.zoho.com.cn ([163.53.93.243]:17110 "EHLO sender2-op-o12.zoho.com.cn" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727844AbgKHOED (ORCPT ); Sun, 8 Nov 2020 09:04:03 -0500 ARC-Seal: i=1; a=rsa-sha256; t=1604844207; cv=none; d=zoho.com.cn; s=zohoarc; b=jSyydPPDI06nqpbPUxBlX9SMyH3EHLzB6uoGQaJmgugonhbOY47jf2bg9RIf0L6DD24QeXcQygz+NPjrqVlpk5MTVCzvOxISjkGKsfJ9xiMYY1NuN93egMj9uYuhe4gfMMoFxbj2Zjsu6AIqB1u3ZeL6XUN3a7CH/HY1A+M5CKY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com.cn; s=zohoarc; t=1604844207; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To; bh=Hs9NI+ahedQ8YyeMtVZWX4Uqq8hHYsmgHZ2u4WxWbuM=; b=ClZ4nlAxYcqppxC1bU5r8O35qwePv4VMM8Wov4VVaKzrlFgG72SiaZxnBmKim16G0qgULK/sLDktPUVYGkQln5vKA1Fc/m5AJ8Ye65Gd4glvEFGJfOHTqQ+FTUSCg4XN/SuEiUmHaesaAfq1unUtFqF9l3ETtAL9u6CExnOk0Q8= 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=1604844207; 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=Hs9NI+ahedQ8YyeMtVZWX4Uqq8hHYsmgHZ2u4WxWbuM=; b=QYaPIrsVQ0xd946iFhvwE7UGRRyP1rMwBzdEu9vklvUecgV5LhBeM0XsHtAULS9e pS9yFFCh/lnzA1f3NxBJpT5g6vGWOlWBl0oHixYJLnOgKYjYlgQz0eQaaqkSyCA5kPn r1V1q1bY33M1izl8he9ryW2spPpJUnwbDE0m+9GE= Received: from localhost.localdomain (113.116.49.189 [113.116.49.189]) by mx.zoho.com.cn with SMTPS id 1604844206284238.6408227363977; Sun, 8 Nov 2020 22:03:26 +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: <20201108140307.1385745-8-cgxu519@mykernel.net> Subject: [RFC PATCH v3 07/10] ovl: implement overlayfs' ->write_inode operation Date: Sun, 8 Nov 2020 22:03:04 +0800 X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201108140307.1385745-1-cgxu519@mykernel.net> References: <20201108140307.1385745-1-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-unionfs@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 694eff76eb09..0ddee18b0bab 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -391,6 +391,35 @@ 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); + +=09iflag |=3D upper->i_state & I_DIRTY_ALL; + +=09if (mapping_writably_mapped(upper->i_mapping) || +=09 mapping_tagged(upper->i_mapping, PAGECACHE_TAG_WRITEBACK)) +=09=09iflag |=3D I_DIRTY_PAGES; + +=09if (iflag) +=09=09ovl_mark_inode_dirty(inode); + +=09return ret; +} + static void ovl_evict_inode(struct inode *inode) { =09struct ovl_fs *ofs =3D inode->i_sb->s_fs_info; @@ -411,6 +440,7 @@ 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