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=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 F2064C55179 for ; Sun, 25 Oct 2020 03:42:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AFFED207F7 for ; Sun, 25 Oct 2020 03:42:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mykernel.net header.i=cgxu519@mykernel.net header.b="cCIvohux" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1766964AbgJYDm2 (ORCPT ); Sat, 24 Oct 2020 23:42:28 -0400 Received: from sender2-op-o12.zoho.com.cn ([163.53.93.243]:17171 "EHLO sender2-op-o12.zoho.com.cn" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1766956AbgJYDm2 (ORCPT ); Sat, 24 Oct 2020 23:42:28 -0400 ARC-Seal: i=1; a=rsa-sha256; t=1603597314; cv=none; d=zoho.com.cn; s=zohoarc; b=cJglc88SO8/m5vvnaacGcQMt4ag/Bcta6ROObVljeZRH8kYjtQzdY6KKT8TyrzE86gAmYDfzQceZ4sT+NTDovmCj2rIyaBlLtnXTGw9jCzIPlyXczxagjuxCqDupOAGdUYXtJ/js0dmUJKpik8pSmZXKgZIsZQOBse8ABh8i3ZU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com.cn; s=zohoarc; t=1603597314; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To; bh=YQPSQWMCt9yX/niXxA9Y98SHIHVYHo3mXqsbyMEGE6M=; b=ZWl2wCbuZIxLUKfIaGOCGr3hY4MR7Rqd3Y6k9JU1y9DjF0byLplTYl/GpBiaFA96sY/FU/IeaY83SsUBFJSunOfR0Y3Er1h0eZ4wNNZv9L8nSBCZrfN/B9el6fK8mVA7xnE+R6CIKeB59cBdivvIRgdRmiNwbuYDToyc09eyJ0U= 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=1603597314; 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=YQPSQWMCt9yX/niXxA9Y98SHIHVYHo3mXqsbyMEGE6M=; b=cCIvohuxRjAO3GwMucSWhaGL1vziikLfVmMSYKgDcDwTe+mwPdPMci0hM3acuX3D xfyP3dyddxmgq9AqGH6UukIetWm8VUMMzbOlVDrIbaOXqf0aJ9Bz8UotLetxDomXOh1 AIrcYZxMrtL7V3ITdTW4b3YWw0b4oV+4Tl/L27e4= Received: from localhost.localdomain (113.88.132.7 [113.88.132.7]) by mx.zoho.com.cn with SMTPS id 1603597313166589.9733889441386; Sun, 25 Oct 2020 11:41:53 +0800 (CST) From: Chengguang Xu To: miklos@szeredi.hu, amir73il@gmail.com, jack@suse.cz Cc: linux-unionfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, Chengguang Xu Message-ID: <20201025034117.4918-7-cgxu519@mykernel.net> Subject: [RFC PATCH v2 6/8] ovl: implement overlayfs' ->write_inode operation Date: Sun, 25 Oct 2020 11:41:15 +0800 X-Mailer: git-send-email 2.26.2 In-Reply-To: <20201025034117.4918-1-cgxu519@mykernel.net> References: <20201025034117.4918-1-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 | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index 5d7e12b8bd1f..960e79e7a8b5 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -15,6 +15,7 @@ #include #include #include +#include #include "overlayfs.h" =20 MODULE_AUTHOR("Miklos Szeredi "); @@ -396,11 +397,36 @@ static void ovl_evict_inode (struct inode *inode) =09clear_inode(inode); } =20 +static int ovl_write_inode(struct inode *inode, +=09=09=09 struct writeback_control *wbc) +{ +=09struct inode *upper =3D ovl_inode_upper(inode); +=09unsigned long iflag =3D 0; +=09int ret =3D 0; + +=09if (!upper) +=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 const struct super_operations ovl_super_operations =3D { =09.alloc_inode=09=3D ovl_alloc_inode, =09.free_inode=09=3D ovl_free_inode, =09.destroy_inode=09=3D ovl_destroy_inode, =09.drop_inode=09=3D generic_delete_inode, +=09.write_inode=09=3D ovl_write_inode, =09.evict_inode=09=3D ovl_evict_inode, =09.put_super=09=3D ovl_put_super, =09.sync_fs=09=3D ovl_sync_fs, --=20 2.26.2