From patchwork Thu Aug 25 23:27:16 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: 9300133 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 51909607F0 for ; Thu, 25 Aug 2016 23:27:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 42C9729410 for ; Thu, 25 Aug 2016 23:27:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 37A1529412; Thu, 25 Aug 2016 23:27:30 +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 A3A1C29410 for ; Thu, 25 Aug 2016 23:27:29 +0000 (UTC) Received: from oss.sgi.com (localhost [IPv6:::1]) by oss.sgi.com (Postfix) with ESMTP id C64D07CB2; Thu, 25 Aug 2016 18:27:25 -0500 (CDT) X-Original-To: xfs@oss.sgi.com Delivered-To: xfs@oss.sgi.com Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (Postfix) with ESMTP id 9F9CE7CB1 for ; Thu, 25 Aug 2016 18:27:23 -0500 (CDT) Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by relay3.corp.sgi.com (Postfix) with ESMTP id 24810AC002 for ; Thu, 25 Aug 2016 16:27:22 -0700 (PDT) X-ASG-Debug-ID: 1472167641-0bf8155c751e5c20001-NocioJ Received: from userp1040.oracle.com (userp1040.oracle.com [156.151.31.81]) by cuda.sgi.com with ESMTP id wnrd0eq26v0SKZpl (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Thu, 25 Aug 2016 16:27:21 -0700 (PDT) X-Barracuda-Envelope-From: darrick.wong@oracle.com X-Barracuda-Effective-Source-IP: userp1040.oracle.com[156.151.31.81] X-Barracuda-Apparent-Source-IP: 156.151.31.81 Received: from aserv0021.oracle.com (aserv0021.oracle.com [141.146.126.233]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id u7PNRJpL012968 (version=TLSv1 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 25 Aug 2016 23:27:20 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserv0021.oracle.com (8.13.8/8.13.8) with ESMTP id u7PNRJh9031053 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 25 Aug 2016 23:27:19 GMT Received: from abhmp0017.oracle.com (abhmp0017.oracle.com [141.146.116.23]) by aserv0121.oracle.com (8.13.8/8.13.8) with ESMTP id u7PNRISf026690; Thu, 25 Aug 2016 23:27:18 GMT Received: from localhost (/10.145.178.207) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 25 Aug 2016 16:27:18 -0700 Subject: [PATCH 3/7] xfsdocs: update the on-disk format with changes for Linux 4.5 From: "Darrick J. Wong" X-ASG-Orig-Subj: [PATCH 3/7] xfsdocs: update the on-disk format with changes for Linux 4.5 To: david@fromorbit.com, darrick.wong@oracle.com Date: Thu, 25 Aug 2016 16:27:16 -0700 Message-ID: <147216763695.32447.8173128727182823319.stgit@birch.djwong.org> In-Reply-To: <147216761636.32447.4229640006064129056.stgit@birch.djwong.org> References: <147216761636.32447.4229640006064129056.stgit@birch.djwong.org> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Source-IP: aserv0021.oracle.com [141.146.126.233] X-Barracuda-Connect: userp1040.oracle.com[156.151.31.81] X-Barracuda-Start-Time: 1472167641 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: 1773 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 Signed-off-by: Darrick J. Wong --- .../XFS_Filesystem_Structure/ondisk_inode.asciidoc | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-) diff --git a/design/XFS_Filesystem_Structure/ondisk_inode.asciidoc b/design/XFS_Filesystem_Structure/ondisk_inode.asciidoc index 4aabc55..dc1fad2 100644 --- a/design/XFS_Filesystem_Structure/ondisk_inode.asciidoc +++ b/design/XFS_Filesystem_Structure/ondisk_inode.asciidoc @@ -66,9 +66,10 @@ of the literal area and +di_forkoff+. The attribute fork is located between [[Inode_Core]] == Inode Core -The inode's core is 96 bytes in size and contains information about the file -itself including most stat data information about data and attribute forks after -the core within the inode. It uses the following structure: +The inode's core is 96 bytes on a V4 filesystem and 176 bytes on a V5 +filesystem. It contains information about the file itself including most stat +data information about data and attribute forks after the core within the +inode. It uses the following structure: [source, c] ---- @@ -313,8 +314,16 @@ Counts the number of changes made to the attributes in this inode. Log sequence number of the last inode write. *di_flags2*:: -Specifies extended flags associated with a v3 inode. There are no flags defined -currently. +Specifies extended flags associated with a v3 inode. + +.Version 3 Inode flags +[options="header"] +|===== +| Flag | Description +| +XFS_DIFLAG2_DAX+ | +For a file, enable DAX to increase performance on persistent-memory storage. +If set on a directory, files created in the directory will inherit this flag. +|===== *di_pad2*:: Padding for future expansion of the inode.