Add lock-order regression test.

b=1844

lustre/tests/lockorder.sh

+#!/bin/sh
+set -e
+
+export PATH=`dirname $0`:$PATH
+CREATEMANY=${CREATEMANY:-createmany}
+STATMANY=${STATMANY:-statmany}
+UNLINKMANY=${UNLINKMANY:-unlinkmany}
+LCTL=${LCTL:-lctl}
+
+MOUNT1=${MOUNT1:-/mnt/lustre1}
+MOUNT2=${MOUNT2:-/mnt/lustre2}
+DIR=${DIR:-$MOUNT1}
+DIR2=${DIR2:-$MOUNT2}
+COUNT=${COUNT:-100}
+
+cleanup() {
+	[ $CR_PID ] && kill -9 $CR_PID
+}
+
+trap cleanup 0
+
+LOCKDIR=$DIR/lockdir
+LOCKFILE=$LOCKDIR/lockfile
+rm -rf $LOCKDIR
+
+NUM=0
+
+MINDIR=$DIR
+MAXDIR=$DIR
+MINRES=2000000000
+MAXRES=0
+mkdir -p $MINDIR
+while [ $MINRES -gt $MAXRES ]; do
+	FILETMP=$MINDIR/f$$${NUM}
+	DIRTMP=$MAXDIR/d$$${NUM}
+	touch $FILETMP
+	mkdir -p $DIRTMP
+	FILERES=`ls -id $FILETMP | awk '{ print $1 }'`
+	DIRRES=`ls -id $DIRTMP | awk '{ print $1 }'`
+	if [ $DIRRES -gt $MAXRES ]; then
+		MAXDIR=$DIRTMP
+		MAXRES=$DIRRES
+	fi
+	if [ $FILERES -lt $MINRES ]; then
+		[ -f "$MINFILE" ] && rm $MINFILE
+		MINFILE=$FILETMP
+		MINRES=$FILERES
+	else
+		rm $TMPFILE
+	fi
+	NUM=$(($NUM + 1))
+done
+
+mv $MAXDIR $LOCKDIR
+mv $MINFILE $LOCKFILE
+rm -rf $DIR/d$$*
+
+$LCTL mark "start dir: $LOCKDIR=$MAXRES file: $LOCKFILE=$MINRES"
+# link will lock $LOCKFILE and $DIR as it creates ${LOCKFILE}{0,1,...}
+$CREATEMANY -l$LOCKFILE $LOCKFILE -$COUNT &
+CR_PID=$!
+
+sleep 1
+
+# this will lock $DIR and ${LOCKFILE}0
+$STATMANY -s $DIR2/lockdir/lockfile 1 -$COUNT &
+ST_PID=$!
+
+sleep $(($COUNT / 2))
+
+$UNLINKMANY $DIR2/lockdir/lockfile 1 $(($COUNT * 1000)) || true
+
+trap 0
+kill $CR_PID || true
+kill $ST_PID || true
+
+#rm -r $PDIR