From patchwork Wed Mar 23 20:12:12 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 8653941 Return-Path: X-Original-To: patchwork-ocfs2-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id E59F49F38C for ; Wed, 23 Mar 2016 20:12:33 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EC05B20121 for ; Wed, 23 Mar 2016 20:12:32 +0000 (UTC) Received: from aserp1040.oracle.com (aserp1040.oracle.com [141.146.126.69]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E14A8200D0 for ; Wed, 23 Mar 2016 20:12:31 +0000 (UTC) Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id u2NKCHQR021079 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 23 Mar 2016 20:12:18 GMT Received: from oss.oracle.com (oss-old-reserved.oracle.com [137.254.22.2]) by userv0021.oracle.com (8.13.8/8.13.8) with ESMTP id u2NKCHN2008510 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 23 Mar 2016 20:12:17 GMT Received: from localhost ([127.0.0.1] helo=lb-oss.oracle.com) by oss.oracle.com with esmtp (Exim 4.63) (envelope-from ) id 1aip8b-0005XX-4p; Wed, 23 Mar 2016 13:12:17 -0700 Received: from userv0021.oracle.com ([156.151.31.71]) by oss.oracle.com with esmtp (Exim 4.63) (envelope-from ) id 1aip8Z-0005XJ-Eu for ocfs2-devel@oss.oracle.com; Wed, 23 Mar 2016 13:12:15 -0700 Received: from aserp1020.oracle.com (aserp1020.oracle.com [141.146.126.67]) by userv0021.oracle.com (8.13.8/8.13.8) with ESMTP id u2NKCEOM008390 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Wed, 23 Mar 2016 20:12:14 GMT Received: from userp2030.oracle.com (userp2030.oracle.com [156.151.31.89]) by aserp1020.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id u2NKCDx5026660 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Wed, 23 Mar 2016 20:12:14 GMT Received: from pps.filterd (userp2030.oracle.com [127.0.0.1]) by userp2030.oracle.com (8.15.0.59/8.15.0.59) with SMTP id u2NKCDVa015017 for ; Wed, 23 Mar 2016 20:12:13 GMT Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) by userp2030.oracle.com with ESMTP id 21ukgau8qf-1 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 23 Mar 2016 20:12:13 +0000 Received: from akpm3.mtv.corp.google.com (unknown [104.132.1.65]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 509CB305; Wed, 23 Mar 2016 20:12:12 +0000 (UTC) Date: Wed, 23 Mar 2016 13:12:12 -0700 From: akpm@linux-foundation.org To: mfasheh@suse.de, jlbec@evilplan.org, junxiao.bi@oracle.com, joseph.qi@huawei.com, ocfs2-devel@oss.oracle.com, akpm@linux-foundation.org, ryan.ding@oracle.com Message-ID: <56f2f89c.ZsLzLQVlrfzj4rNW%akpm@linux-foundation.org> User-Agent: Heirloom mailx 12.5 6/20/10 MIME-Version: 1.0 X-Proofpoint-SPF-Result: pass X-Proofpoint-SPF-Record: v=spf1 ip4:140.211.169.12/30 include:_spf.google.com ~all X-ServerName: mail.linuxfoundation.org X-Proofpoint-Virus-Version: vendor=nai engine=5800 definitions=8113 signatures=670704 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1601100000 definitions=main-1603230309 Subject: [Ocfs2-devel] [patch 10/25] ocfs2: take ip_alloc_sem in ocfs2_dio_get_block & ocfs2_dio_end_io_write X-BeenThere: ocfs2-devel@oss.oracle.com X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: ocfs2-devel-bounces@oss.oracle.com Errors-To: ocfs2-devel-bounces@oss.oracle.com X-Source-IP: userv0021.oracle.com [156.151.31.71] X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Ryan Ding Subject: ocfs2: take ip_alloc_sem in ocfs2_dio_get_block & ocfs2_dio_end_io_write Take ip_alloc_sem to prevent concurrent access to extent tree, which may cause the extent tree in an unstable state. Signed-off-by: Ryan Ding Reviewed-by: Junxiao Bi Cc: Joseph Qi Cc: Mark Fasheh Cc: Joel Becker Signed-off-by: Andrew Morton --- fs/ocfs2/aops.c | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-) diff -puN fs/ocfs2/aops.c~ocfs2-take-ip_alloc_sem-in-ocfs2_dio_get_block-ocfs2_dio_end_io_write fs/ocfs2/aops.c --- a/fs/ocfs2/aops.c~ocfs2-take-ip_alloc_sem-in-ocfs2_dio_get_block-ocfs2_dio_end_io_write +++ a/fs/ocfs2/aops.c @@ -2151,6 +2151,7 @@ static int ocfs2_dio_get_block(struct in struct buffer_head *bh_result, int create) { struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct ocfs2_inode_info *oi = OCFS2_I(inode); struct ocfs2_write_ctxt *wc; struct ocfs2_write_cluster_desc *desc = NULL; struct ocfs2_dio_write_ctxt *dwc = NULL; @@ -2166,9 +2167,12 @@ static int ocfs2_dio_get_block(struct in mlog(0, "get block of %lu at %llu:%u req %u\n", inode->i_ino, pos, len, total_len); + down_read(&oi->ip_alloc_sem); /* This is the fast path for re-write. */ ret = ocfs2_get_block(inode, iblock, bh_result, create); + up_read(&oi->ip_alloc_sem); + if (buffer_mapped(bh_result) && !buffer_new(bh_result) && ret == 0) @@ -2206,6 +2210,8 @@ static int ocfs2_dio_get_block(struct in goto out; } + down_write(&oi->ip_alloc_sem); + if (first_get_block) { if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) ret = ocfs2_zero_tail(inode, di_bh, pos); @@ -2259,6 +2265,7 @@ static int ocfs2_dio_get_block(struct in BUG_ON(ret != len); ret = 0; unlock: + up_write(&oi->ip_alloc_sem); ocfs2_inode_unlock(inode, 1); brelse(di_bh); out: @@ -2275,6 +2282,7 @@ static void ocfs2_dio_end_io_write(struc struct ocfs2_cached_dealloc_ctxt dealloc; struct ocfs2_extent_tree et; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct ocfs2_inode_info *oi = OCFS2_I(inode); struct ocfs2_unwritten_extent *ue = NULL; struct buffer_head *di_bh = NULL; struct ocfs2_dinode *di; @@ -2293,12 +2301,6 @@ static void ocfs2_dio_end_io_write(struc !dwc->dw_orphaned) goto out; - ret = ocfs2_inode_lock(inode, &di_bh, 1); - if (ret < 0) { - mlog_errno(ret); - goto out; - } - /* ocfs2_file_write_iter will get i_mutex, so we need not lock if we * are in that context. */ if (dwc->dw_writer_pid != task_pid_nr(current)) { @@ -2306,6 +2308,14 @@ static void ocfs2_dio_end_io_write(struc locked = 1; } + ret = ocfs2_inode_lock(inode, &di_bh, 1); + if (ret < 0) { + mlog_errno(ret); + goto out; + } + + down_write(&oi->ip_alloc_sem); + /* Delete orphan before acquire i_mutex. */ if (dwc->dw_orphaned) { BUG_ON(dwc->dw_writer_pid != task_pid_nr(current)); @@ -2359,6 +2369,7 @@ static void ocfs2_dio_end_io_write(struc commit: ocfs2_commit_trans(osb, handle); unlock: + up_write(&oi->ip_alloc_sem); ocfs2_inode_unlock(inode, 1); brelse(di_bh); out: