From patchwork Wed Oct 10 00:14:31 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 10633717 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DDCE016B1 for ; Wed, 10 Oct 2018 00:14:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CDB09284C9 for ; Wed, 10 Oct 2018 00:14:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C24FE28F95; Wed, 10 Oct 2018 00:14:39 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7F3DD284C9 for ; Wed, 10 Oct 2018 00:14:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726822AbeJJHeE (ORCPT ); Wed, 10 Oct 2018 03:34:04 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:60630 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725955AbeJJHeE (ORCPT ); Wed, 10 Oct 2018 03:34:04 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w9A0DqkA086521; Wed, 10 Oct 2018 00:14:34 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : from : to : cc : date : message-id : in-reply-to : references : mime-version : content-type : content-transfer-encoding; s=corp-2018-07-02; bh=Icc+JrsLPRZVtCMs/wn62urfmv9Yq+ib7pEnkq7mY+Y=; b=sj0/q1R+kRa+FPhQ+pFYjxffHMcLA+Cllcu/sqI5DIyAK3T5Br7rj5K5cWgnRpW8bEzb f6wk8ICnAAU71CNsjeJq7h3TXJb+JFLtG2VuULDBtS4ATeJMFkMxWyjrwyKDUGRi7R9L 909vQpoOuPiE1DFrP5UTdg+BKjBy/BozIgVP3+tRzMYVee49ZpB10x9RDeyRcHB2Wy2H 6qrZ1yJLFiXnND4K6FGLot55pOUu6Iig2I8ldDJ/DxpAG1Fm7lenleNgVc8xgFNWdXul CIzvVIuheeVAJkPBsgcbR1/Y9xfwkJeGqBX15K9iKt3+241VrpY9eH2/syPLQEww+Qec ag== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp2120.oracle.com with ESMTP id 2mxnpr0pa0-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 10 Oct 2018 00:14:34 +0000 Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w9A0EYB4016267 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 10 Oct 2018 00:14:34 GMT Received: from abhmp0010.oracle.com (abhmp0010.oracle.com [141.146.116.16]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w9A0EXwY022053; Wed, 10 Oct 2018 00:14:33 GMT Received: from localhost (/10.159.249.114) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 10 Oct 2018 00:14:32 +0000 Subject: [PATCH 22/25] ocfs2: fix pagecache truncation prior to reflink From: "Darrick J. Wong" To: david@fromorbit.com, darrick.wong@oracle.com Cc: sandeen@redhat.com, linux-nfs@vger.kernel.org, linux-cifs@vger.kernel.org, linux-unionfs@vger.kernel.org, linux-xfs@vger.kernel.org, linux-mm@kvack.org, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, ocfs2-devel@oss.oracle.com Date: Tue, 09 Oct 2018 17:14:31 -0700 Message-ID: <153913047133.32295.149030337934464712.stgit@magnolia> In-Reply-To: <153913023835.32295.13962696655740190941.stgit@magnolia> References: <153913023835.32295.13962696655740190941.stgit@magnolia> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9041 signatures=668706 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=902 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1810100001 Sender: linux-cifs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-cifs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Darrick J. Wong Prior to remapping blocks, it is necessary to remove pages from the destination file's page cache. Unfortunately, the truncation is not aggressive enough -- if page size > block size, we'll end up zeroing subpage blocks instead of removing them. So, round the start offset down and the end offset up. Signed-off-by: Darrick J. Wong --- fs/ocfs2/refcounttree.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c index 851ba3ae7ce8..b9e0418a1974 100644 --- a/fs/ocfs2/refcounttree.c +++ b/fs/ocfs2/refcounttree.c @@ -4870,8 +4870,9 @@ int ocfs2_reflink_remap_range(struct file *file_in, SINGLE_DEPTH_NESTING); /* Zap any page cache for the destination file's range. */ - truncate_inode_pages_range(&inode_out->i_data, pos_out, - PAGE_ALIGN(pos_out + len) - 1); + truncate_inode_pages_range(&inode_out->i_data, + round_down(pos_out, PAGE_SIZE), + round_up(pos_out + len, PAGE_SIZE) - 1); ret = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in, inode_out, out_bh, pos_out, len);