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diff --git a/extras/geo-rep/gsync-upgrade.sh b/extras/geo-rep/gsync-upgrade.sh
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+#!/bin/bash
+#usage: gsync-upgrade.sh <slave-volfile-server:slave-volume> <gfid-file>
+# <path-to-gsync-sync-gfid> <ssh-identity-file>
+#<slave-volfile-server>: a machine on which gluster cli can fetch slave volume info.
+# slave-volfile-server defaults to localhost.
+#
+#<gfid-file>: a file containing paths and their associated gfids
+# on master. The paths are relative to master mount point
+# (not absolute). An example extract of <gfid-file> can be,
+#
+# <extract>
+# 22114455-57c5-46e9-a783-c40f83a72b09 /dir
+# 25772386-3eb8-4550-a802-c3fdc938ca80 /dir/file
+# </extract>
+#
+#<ssh-identity-file>: file from which the identity (private key) for public key authentication is read.
+
+SLAVE_MOUNT='/tmp/glfs_slave'
+
+function SSH()
+{
+ HOST=$1
+ SSHKEY=$2
+
+ shift 2
+
+ ssh -qi $SSHKEY \
+ -oPasswordAuthentication=no \
+ -oStrictHostKeyChecking=no \
+ "$HOST" "$@";
+}
+
+function get_bricks()
+{
+ SSHKEY=$3
+
+ SSH $1 $SSHKEY "gluster volume info $2" | grep -E 'Brick[0-9]+' | sed -e 's/[^:]*:\(.*\)/\1/g'
+}
+
+function cleanup_brick()
+{
+ HOST=$1
+ BRICK=$2
+ SSHKEY=$3
+
+ # TODO: write a C program to receive a list of files and does cleanup on
+ # them instead of spawning a new setfattr process for each file if
+ # performance is bad.
+ SSH -i $SSHKEY $HOST "rm -rf $BRICK/.glusterfs/* && find $BRICK -exec setfattr -x trusted.gfid {} \;"
+}
+
+function cleanup_slave()
+{
+ SSHKEY=$2
+
+ VOLFILE_SERVER=`echo $1 | sed -e 's/\(.*\):.*/\1/'`
+ VOLUME_NAME=`echo $1 | sed -e 's/.*:\(.*\)/\1/'`
+
+ BRICKS=`get_bricks $VOLFILE_SERVER $VOLUME_NAME $SSHKEY`
+
+ for i in $BRICKS; do
+ HOST=`echo $i | sed -e 's/\(.*\):.*/\1/'`
+ BRICK=`echo $i | sed -e 's/.*:\(.*\)/\1/'`
+ cleanup_brick $HOST $BRICK $SSHKEY
+ done
+
+ SSH -i $SSHKEY $VOLFILE_SERVER "gluster --mode=script volume stop $VOLUME_NAME; gluster volume start $VOLUME_NAME";
+
+}
+
+function mount_client()
+{
+ local T; # temporary mount
+ local i; # inode number
+ GFID_FILE=$3
+ SYNC_CMD=$4
+
+ T=$(mktemp -d);
+
+ glusterfs --aux-gfid-mount -s $1 --volfile-id $2 $T;
+
+ i=$(stat -c '%i' $T);
+
+ [ "x$i" = "x1" ] || fatal "could not mount volume $MASTER on $T";
+
+ cd $T;
+
+ $SYNC_CMD $GFID_FILE
+
+ cd -;
+
+ umount -l $T || fatal "could not umount $MASTER from $T";
+
+ rmdir $T || warn "rmdir of $T failed";
+}
+
+function sync_gfids()
+{
+ SLAVE=$1
+ GFID_FILE=$2
+
+ SLAVE_VOLFILE_SERVER=`echo $SLAVE | sed -e 's/\(.*\):.*/\1/'`
+ SLAVE_VOLUME_NAME=`echo $SLAVE | sed -e 's/.*:\(.*\)/\1/'`
+
+ if [ "x$SLAVE_VOLFILE_SERVER" = "x" ]; then
+ SLAVE_VOLFILE_SERVER="localhost"
+ fi
+
+ mount_client $SLAVE_VOLFILE_SERVER $SLAVE_VOLUME_NAME $GFID_FILE $3
+}
+
+function upgrade()
+{
+ SLAVE=$1
+ GFID_FILE=$2
+ SYNC_CMD=$3
+ SSHKEY=$4
+
+ cleanup_slave $SLAVE $SSHKEY
+ sync_gfids $SLAVE $GFID_FILE $SYNC_CMD
+}
+
+upgrade "$@"