From patchwork Thu Aug 25 23:40:25 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 9300367 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 22F6360757 for ; Thu, 25 Aug 2016 23:41:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 13B5F292E8 for ; Thu, 25 Aug 2016 23:41:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0887D293C1; Thu, 25 Aug 2016 23:41:00 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from oss.sgi.com (oss.sgi.com [192.48.182.195]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6E7FA292E8 for ; Thu, 25 Aug 2016 23:40:59 +0000 (UTC) Received: from oss.sgi.com (localhost [IPv6:::1]) by oss.sgi.com (Postfix) with ESMTP id EB9FA7EDA; Thu, 25 Aug 2016 18:40:33 -0500 (CDT) X-Original-To: xfs@oss.sgi.com Delivered-To: xfs@oss.sgi.com Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (Postfix) with ESMTP id 16D857ED4 for ; Thu, 25 Aug 2016 18:40:32 -0500 (CDT) Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by relay2.corp.sgi.com (Postfix) with ESMTP id B5769304043 for ; Thu, 25 Aug 2016 16:40:31 -0700 (PDT) X-ASG-Debug-ID: 1472168429-0bf8155c751e7370001-NocioJ Received: from aserp1040.oracle.com (aserp1040.oracle.com [141.146.126.69]) by cuda.sgi.com with ESMTP id B7A56keMhv0BqBRN (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Thu, 25 Aug 2016 16:40:30 -0700 (PDT) X-Barracuda-Envelope-From: darrick.wong@oracle.com X-Barracuda-Effective-Source-IP: aserp1040.oracle.com[141.146.126.69] X-Barracuda-Apparent-Source-IP: 141.146.126.69 Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by aserp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id u7PNeScL017016 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 25 Aug 2016 23:40:28 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userv0022.oracle.com (8.14.4/8.13.8) with ESMTP id u7PNeRfC024305 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 25 Aug 2016 23:40:28 GMT Received: from abhmp0012.oracle.com (abhmp0012.oracle.com [141.146.116.18]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id u7PNeRRh018897; Thu, 25 Aug 2016 23:40:27 GMT Received: from localhost (/10.145.178.207) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 25 Aug 2016 16:40:27 -0700 Subject: [PATCH 02/25] xfs: report shared extents in getfsmapx From: "Darrick J. Wong" X-ASG-Orig-Subj: [PATCH 02/25] xfs: report shared extents in getfsmapx To: david@fromorbit.com, darrick.wong@oracle.com Date: Thu, 25 Aug 2016 16:40:25 -0700 Message-ID: <147216842570.3108.8594952543604455508.stgit@birch.djwong.org> In-Reply-To: <147216841262.3108.10746252464845687338.stgit@birch.djwong.org> References: <147216841262.3108.10746252464845687338.stgit@birch.djwong.org> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Source-IP: userv0022.oracle.com [156.151.31.74] X-Barracuda-Connect: aserp1040.oracle.com[141.146.126.69] X-Barracuda-Start-Time: 1472168430 X-Barracuda-Encrypted: ECDHE-RSA-AES256-GCM-SHA384 X-Barracuda-URL: https://192.48.157.11:443/cgi-mod/mark.cgi X-Barracuda-Scan-Msg-Size: 2295 X-Virus-Scanned: by bsmtpd at sgi.com X-Barracuda-BRTS-Status: 1 X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using per-user scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.7 tests=BSF_SC0_MISMATCH_TO, UNPARSEABLE_RELAY X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.32328 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 BSF_SC0_MISMATCH_TO Envelope rcpt doesn't match header 0.00 UNPARSEABLE_RELAY Informational: message has unparseable relay lines Cc: linux-xfs@vger.kernel.org, xfs@oss.sgi.com X-BeenThere: xfs@oss.sgi.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com X-Virus-Scanned: ClamAV using ClamSMTP Cross-reference the reverse mapping data with the refcount btree to find out which extents are shared. Signed-off-by: Darrick J. Wong --- fs/xfs/xfs_fsmap.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/fs/xfs/xfs_fsmap.c b/fs/xfs/xfs_fsmap.c index a167acb..2eca7b9 100644 --- a/fs/xfs/xfs_fsmap.c +++ b/fs/xfs/xfs_fsmap.c @@ -37,6 +37,8 @@ #include "xfs_alloc.h" #include "xfs_bit.h" #include "xfs_fsmap.h" +#include "xfs_refcount.h" +#include "xfs_refcount_btree.h" /* getfsmap query state */ struct xfs_getfsmap_info { @@ -99,6 +101,42 @@ xfs_getfsmap_rec_before_low_key( return false; } +/* Decide if this mapping is shared. */ +STATIC int +xfs_getfsmap_is_shared( + struct xfs_mount *mp, + struct xfs_getfsmap_info *info, + struct xfs_rmap_irec *rec, + bool *stat) +{ + struct xfs_btree_cur *cur; + xfs_agblock_t fbno; + xfs_extlen_t flen; + int error; + + *stat = false; + if (!xfs_sb_version_hasreflink(&mp->m_sb)) + return 0; + /* rt files will have agno set to NULLAGNUMBER */ + if (info->agno == NULLAGNUMBER) + return 0; + + /* Are there any shared blocks here? */ + flen = 0; + cur = xfs_refcountbt_init_cursor(mp, NULL, info->agbp, + info->agno, NULL); + + error = xfs_refcount_find_shared(cur, rec->rm_startblock, + rec->rm_blockcount, &fbno, &flen, false); + + xfs_btree_del_cursor(cur, error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); + if (error) + return error; + + *stat = flen > 0; + return 0; +} + /* * Format a reverse mapping for getfsmap, having translated rm_startblock * into the appropriate daddr units. @@ -112,6 +150,7 @@ xfs_getfsmap_helper( { struct getfsmap fmv; xfs_daddr_t key_end; + bool shared; int error; /* @@ -221,6 +260,13 @@ xfs_getfsmap_helper( fmv.fmv_oflags |= FMV_OF_ATTR_FORK; if (rec->rm_flags & XFS_RMAP_BMBT_BLOCK) fmv.fmv_oflags |= FMV_OF_EXTENT_MAP; + if (fmv.fmv_oflags == 0) { + error = xfs_getfsmap_is_shared(mp, info, rec, &shared); + if (error) + return error; + if (shared) + fmv.fmv_oflags |= FMV_OF_SHARED; + } error = info->formatter(&fmv, info->format_arg); if (error) return error;