From patchwork Wed Jan 15 17:02:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 11335397 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2280592A for ; Wed, 15 Jan 2020 17:03:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0150D24671 for ; Wed, 15 Jan 2020 17:03:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="IIz7YPiA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728963AbgAORDQ (ORCPT ); Wed, 15 Jan 2020 12:03:16 -0500 Received: from aserp2120.oracle.com ([141.146.126.78]:34486 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726574AbgAORDQ (ORCPT ); Wed, 15 Jan 2020 12:03:16 -0500 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id 00FGhXBd193122; Wed, 15 Jan 2020 17:03:04 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-2019-08-05; bh=bo4C+FjZ6pC9B5172rgVcQ00PpkmYirHMO77OF2J/ww=; b=IIz7YPiAe6VYeyg/Ti3BBFAnGuBv/98YCkuKPG7eSz9SaXndEPSygQ4Je/s+1jRi4YIc RP/qMzhO5uGZOb2mOUX5e/0aXfwZO3xj1kPFmu2scQ/Ks/T5Hyqsu3lLIP1zBzJlwwQ8 t99OcR4ihBq4I15rrWwKQUj/sqpYs//4/FTClDVeq1LydGEJ8Vr8dN1mVpTg0meZU8XS 3ELeIbe6zgbmQC+pnkq077qcz4d2vC9Fh7kWiVPN0KSJJ2xKf9pW93JDl4MOSG0R5xhM TICRdj97NCotRm1VOk/64YL7hXm3pO86PYmWJx040rCMGUMAi7+aMFMYDJPmhEaKWT8s 9Q== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by aserp2120.oracle.com with ESMTP id 2xf73twb8c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 15 Jan 2020 17:03:04 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id 00FGhwRT021632; Wed, 15 Jan 2020 17:03:03 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3020.oracle.com with ESMTP id 2xj1prgm04-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 15 Jan 2020 17:03:02 +0000 Received: from abhmp0008.oracle.com (abhmp0008.oracle.com [141.146.116.14]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 00FH316M023256; Wed, 15 Jan 2020 17:03:01 GMT Received: from localhost (/67.169.218.210) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 15 Jan 2020 09:03:00 -0800 Subject: [PATCH 1/7] xfs: refactor remote attr value buffer invalidation From: "Darrick J. Wong" To: darrick.wong@oracle.com Cc: linux-xfs@vger.kernel.org, hch@infradead.org, Christoph Hellwig Date: Wed, 15 Jan 2020 09:02:59 -0800 Message-ID: <157910777966.2028015.5063424466481996316.stgit@magnolia> In-Reply-To: <157910777330.2028015.5017943601641757827.stgit@magnolia> References: <157910777330.2028015.5017943601641757827.stgit@magnolia> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9501 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=898 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001150129 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9501 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=948 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911140001 definitions=main-2001150129 Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org From: Darrick J. Wong Hoist the code that invalidates remote extended attribute value buffers into a separate helper function. This prepares us for a memory corruption fix in the next patch. Signed-off-by: Darrick J. Wong Reviewed-by: Christoph Hellwig --- fs/xfs/libxfs/xfs_attr_remote.c | 52 ++++++++++++++++++++++++--------------- fs/xfs/libxfs/xfs_attr_remote.h | 2 ++ 2 files changed, 34 insertions(+), 20 deletions(-) diff --git a/fs/xfs/libxfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c index a6ef5df42669..df1ab0569481 100644 --- a/fs/xfs/libxfs/xfs_attr_remote.c +++ b/fs/xfs/libxfs/xfs_attr_remote.c @@ -552,6 +552,33 @@ xfs_attr_rmtval_set( return 0; } +/* Mark stale any incore buffers for the remote value. */ +int +xfs_attr_rmtval_stale( + struct xfs_inode *ip, + struct xfs_bmbt_irec *map, + xfs_buf_flags_t incore_flags) +{ + struct xfs_mount *mp = ip->i_mount; + struct xfs_buf *bp; + + ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); + + if (XFS_IS_CORRUPT(mp, map->br_startblock == DELAYSTARTBLOCK) || + XFS_IS_CORRUPT(mp, map->br_startblock == HOLESTARTBLOCK)) + return -EFSCORRUPTED; + + bp = xfs_buf_incore(mp->m_ddev_targp, + XFS_FSB_TO_DADDR(mp, map->br_startblock), + XFS_FSB_TO_BB(mp, map->br_blockcount), incore_flags); + if (bp) { + xfs_buf_stale(bp); + xfs_buf_relse(bp); + } + + return 0; +} + /* * Remove the value associated with an attribute by deleting the * out-of-line buffer that it is stored on. @@ -560,7 +587,6 @@ int xfs_attr_rmtval_remove( struct xfs_da_args *args) { - struct xfs_mount *mp = args->dp->i_mount; xfs_dablk_t lblkno; int blkcnt; int error; @@ -575,9 +601,6 @@ xfs_attr_rmtval_remove( blkcnt = args->rmtblkcnt; while (blkcnt > 0) { struct xfs_bmbt_irec map; - struct xfs_buf *bp; - xfs_daddr_t dblkno; - int dblkcnt; int nmap; /* @@ -588,22 +611,11 @@ xfs_attr_rmtval_remove( blkcnt, &map, &nmap, XFS_BMAPI_ATTRFORK); if (error) return error; - ASSERT(nmap == 1); - ASSERT((map.br_startblock != DELAYSTARTBLOCK) && - (map.br_startblock != HOLESTARTBLOCK)); - - dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock), - dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount); - - /* - * If the "remote" value is in the cache, remove it. - */ - bp = xfs_buf_incore(mp->m_ddev_targp, dblkno, dblkcnt, XBF_TRYLOCK); - if (bp) { - xfs_buf_stale(bp); - xfs_buf_relse(bp); - bp = NULL; - } + if (XFS_IS_CORRUPT(args->dp->i_mount, nmap != 1)) + return -EFSCORRUPTED; + error = xfs_attr_rmtval_stale(args->dp, &map, XBF_TRYLOCK); + if (error) + return error; lblkno += map.br_blockcount; blkcnt -= map.br_blockcount; diff --git a/fs/xfs/libxfs/xfs_attr_remote.h b/fs/xfs/libxfs/xfs_attr_remote.h index 9d20b66ad379..6fb4572845ce 100644 --- a/fs/xfs/libxfs/xfs_attr_remote.h +++ b/fs/xfs/libxfs/xfs_attr_remote.h @@ -11,5 +11,7 @@ int xfs_attr3_rmt_blocks(struct xfs_mount *mp, int attrlen); int xfs_attr_rmtval_get(struct xfs_da_args *args); int xfs_attr_rmtval_set(struct xfs_da_args *args); int xfs_attr_rmtval_remove(struct xfs_da_args *args); +int xfs_attr_rmtval_stale(struct xfs_inode *ip, struct xfs_bmbt_irec *map, + xfs_buf_flags_t incore_flags); #endif /* __XFS_ATTR_REMOTE_H__ */