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 325B9C4742C for ; Fri, 13 Nov 2020 06:57:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DDF2E206D9 for ; Fri, 13 Nov 2020 06:57:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mykernel.net header.i=cgxu519@mykernel.net header.b="gCORlk4J" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726133AbgKMG5M (ORCPT ); Fri, 13 Nov 2020 01:57:12 -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 S1726083AbgKMG5M (ORCPT ); Fri, 13 Nov 2020 01:57:12 -0500 ARC-Seal: i=1; a=rsa-sha256; t=1605250613; cv=none; d=zoho.com.cn; s=zohoarc; b=OJGa2fcfyxjzbu6AIxkD0UAXvQRC6G45+olHvR+tMNLEmSDjd24uyEb8FsWo1vlQ7GAHOsnMRvfLwczMfsCfS86ZNitGu4a/rkRIV1vPiXtrKTWKWp9mncnxaxJuDxPEfOhxAWk6XnU1+QkL8Wml7fn+1e0s6f48i/nNnpBGU88= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com.cn; s=zohoarc; t=1605250613; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:MIME-Version:Message-ID:References:Subject:To; bh=ZdSh8eREzPnVlAiCPIG4ZzRu+AUpP6611hYDLM3CBvA=; b=djoK7g0dGQs8rKmXsm4bxZt3XAWJCJs8dBug6owYooLrhaUFuNbdEtLQyIW0ncKGa+OonTD2rdvJMzab97c7o23JTRxl3LYYY94sbBArvdKxICbln3lNtPnmUvLScD4VJstij3LYLyB669ct/JQCsSutasY9P/JfwuryJwRQI8U= 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=1605250613; 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=ZdSh8eREzPnVlAiCPIG4ZzRu+AUpP6611hYDLM3CBvA=; b=gCORlk4JijJuB0JBxE24pZGE9itXVfRRXaigLnif8HnXmfeVm8oxuQ+Q1ljBEgxx 1kSUYROLpQddYLV+7Obr80NTeWOhpMpZWp5e6Hr78+4P9fyXItBWsZRIslOEJAwVSKB p7NHr4vkr3Y32tYS5XcHRjGVEGteLlBIvE6gRXKM= Received: from localhost.localdomain (116.30.195.173 [116.30.195.173]) by mx.zoho.com.cn with SMTPS id 1605250610633346.4087931492967; Fri, 13 Nov 2020 14:56:50 +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: <20201113065555.147276-3-cgxu519@mykernel.net> Subject: [RFC PATCH v4 2/9] ovl: implement ->writepages operation Date: Fri, 13 Nov 2020 14:55:48 +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-unionfs@vger.kernel.org Implement overlayfs' ->writepages operation so that we can sync dirty data/metadata to upper filesystem. Signed-off-by: Chengguang Xu --- fs/overlayfs/inode.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index b584dca845ba..8cfa75e86f56 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -11,6 +11,7 @@ #include #include #include +#include #include "overlayfs.h" =20 =20 @@ -516,7 +517,20 @@ static const struct inode_operations ovl_special_inode= _operations =3D { =09.update_time=09=3D ovl_update_time, }; =20 +static int ovl_writepages(struct address_space *mapping, +=09=09=09 struct writeback_control *wbc) +{ +=09struct inode *inode =3D mapping->host; +=09struct ovl_fs *ofs =3D inode->i_sb->s_fs_info; +=09struct inode *upper =3D ovl_inode_upper(inode); + +=09if (!ovl_should_sync(ofs)) +=09=09return 0; +=09return sync_inode(upper, wbc); +} + static const struct address_space_operations ovl_aops =3D { +=09.writepages=09=09=3D ovl_writepages, =09/* For O_DIRECT dentry_open() checks f_mapping->a_ops->direct_IO */ =09.direct_IO=09=09=3D noop_direct_IO, }; --=20 2.26.2