[Ocfs2-tools-commits] smushran commits r1313 - trunk/extras

[svn-commits at oss.oracle.com]

Author: smushran
Date: 2007-03-02 11:38:33 -0800 (Fri, 02 Mar 2007)
New Revision: 1313

Added:
   trunk/extras/verify_backup_super
Log:
verify_backup_super script added
Signed-off-by: mmatsuna

Added: trunk/extras/verify_backup_super
===================================================================
--- trunk/extras/verify_backup_super	2007-03-02 02:14:56 UTC (rev 1312)
+++ trunk/extras/verify_backup_super	2007-03-02 19:38:33 UTC (rev 1313)
@@ -0,0 +1,159 @@
+#!/bin/bash
+# 
+# Copyright (C) 2007 Oracle.  All rights reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public
+# License, version 2,  as published by the Free Software Foundation.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public
+# License along with this program; if not, write to the
+# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+# Boston, MA 021110-1307, USA.
+#
+# Author: Sunil Mushran 03/01/2007
+#
+################################################################
+#
+# verify_backup_super
+#
+# This script lists all the objects using the clusters that are
+# reserved for OCFS2's backup superblocks. This script is
+# useful for users unable to retroactively enable backup super
+# block using tunefs.ocfs2 --backup-super.
+#
+################################################################
+
+usage() {
+    echo "usage ${APP} /dev/sdX"
+    exit 1
+}
+
+get_sizes() {
+    bsbits=`${DEBUGFS} -R "stats" ${device} 2>/dev/null | ${AWK} '/Block Size Bits/ {print $4;}'`
+    csbits=`${DEBUGFS} -R "stats" ${device} 2>/dev/null | ${AWK} '/Cluster Size Bits/ {print $8;}'`
+    numcls=`${DEBUGFS} -R "stats" ${device} 2>/dev/null | ${AWK} '/Clusters:/ {print $4;}'`
+
+    if [ -z "$bsbits" ] || [ -a "$csbits" ] || [ -a "$numcls" ]; then
+        echo "error: not an OCFS2 device"
+        exit 1
+    fi
+
+    #in bytes
+    blocksize=$[$[2 ** $[$bsbits - 9]] * 512]
+    clustsize=$[$[2 ** $[$csbits - 9]] * 512]
+
+    #in blocks
+    numblocks=$[$numcls * $clustsize / $blocksize]
+}
+
+# Ensure version is >= 1.2.3
+verify_version() {
+    ret=`${DEBUGFS} --version 2>&1 |
+         ${AWK} '/debugfs.ocfs2/ {
+              flds=split($2, ver, ".");
+              if (flds >= 3) { if (ver[1] > 1) {print 1;}
+                               else if (ver[2] < 2) {print 0;}
+                               else if (ver[2] > 2) {print 1;}
+                               else if (ver[3] > 2) {print 1;}
+                               else {print 0}; }
+              else {print 0;} }'`
+    if [ "${ret}" = "0" ]; then
+        echo "Upgrade to ocfs2-tools 1.2.3 or later"
+        exit 1
+    fi
+}
+
+# Feature Compat: 1 BackupSuper
+has_backup_super() {
+    feat=`${DEBUGFS} -R "stats" ${device} 2>/dev/null |
+            ${AWK} 'BEGIN {fnd=0;} /Feature Compat/ {if (match($0, "BackupSuper")) fnd=1;} END {print fnd;}'`
+    if [ "${feat}" = "1" ]; then
+        echo "Backup super block already enabled on device ${device}"
+        exit 0
+    fi
+}
+
+get_icheck_args() {
+    if [ $numblocks -le ${backup[0]} ]; then
+        echo "Device $device too small to hold backup superblocks"
+        exit 0
+    fi
+
+    for i in `${SEQ} 0 5`
+    do
+       block=$[${backup[$i]} / $[2 ** $[$bsbits - 9]]]
+       if [ $block -lt $numblocks ]; then
+           icheckargs="$icheckargs $block"
+       else
+           break
+       fi
+    done
+}
+
+DEBUGFS=`which debugfs.ocfs2`
+AWK=`which awk`
+SEQ=`which seq`
+TEE=`which tee`
+DATE=`which date`
+APP=`basename $0`
+
+if [ -z "${DEBUGFS}" ]; then echo "error: \"debugfs.ocfs2\" not found in path"; exit 1; fi
+if [ -z "${AWK}" ]; then echo "error: \"awk\" not found in path"; exit 1; fi
+if [ -z "${SEQ}" ]; then echo "error: \"seq\" not found in path"; exit 1; fi
+if [ -z "${TEE}" ]; then echo "error: \"tee\" not found in path"; exit 1; fi
+if [ -z "${DATE}" ]; then echo "error: \"date\" not found in path"; exit 1; fi
+
+blocksize=0
+bsbits=0
+csbits=0
+clustersize=0
+numblocks=0
+icheckargs=""
+
+YMD=`${DATE} +%Y%m%d_%H%M%S`
+TEMPFILE=/tmp/__${YMD}__
+
+# Backup super offsets in 512 byte blocks
+backup[0]=2097152
+backup[1]=8388608
+backup[2]=33554432
+backup[3]=134217728
+backup[4]=536870912
+backup[5]=2147483648
+
+device=$1
+
+if [ -z "${device}" ]; then
+    usage ;
+fi
+
+get_sizes
+
+verify_version
+
+has_backup_super
+
+get_icheck_args
+
+echo "Locating inodes using blocks${icheckargs} on device ${device}"
+#echo "${DEBUGFS} -R \"icheck${icheckargs}\" ${device}"
+${DEBUGFS} -R "icheck${icheckargs}" ${device} | ${TEE} ${TEMPFILE}
+
+inodes=`${AWK} 'BEGIN {out = "";} // {if (strtonum($2) != 0) out = out " " "<"$2">";} END {print out};'  ${TEMPFILE}`
+
+#echo $inodes
+
+if [ -z "${inodes}" ]; then
+    echo "All Backup superblock clusters are unused"
+    exit 0
+fi
+
+echo "Matching inodes to object names"
+#echo "${DEBUGFS} -R \"findpath ${inodes}\" ${device}"
+${DEBUGFS} -R "findpath ${inodes}" ${device}


Property changes on: trunk/extras/verify_backup_super
___________________________________________________________________
Name: svn:executable
   + *