X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Ftests%2Fsanityn.sh;h=91f9f9a3aa17b45093c3f4a24ab9c2eb84b1949d;hp=53499c2f1c1eff249892cf71b3ed4287b2e2cbbf;hb=HEAD;hpb=5a6ceb664f07812c351786c1043da71ff5027f8c;ds=sidebyside

diff --git a/lustre/tests/sanityn.sh b/lustre/tests/sanityn.sh
index 53499c2..896dce9 100755
--- a/lustre/tests/sanityn.sh
+++ b/lustre/tests/sanityn.sh
@@ -3,44 +3,37 @@
 set -e
 
 ONLY=${ONLY:-"$*"}
-# bug number for skipped test: 9977/LU-7105
-ALWAYS_EXCEPT="                28           $SANITYN_EXCEPT"
-# UPDATE THE COMMENT ABOVE WITH BUG NUMBERS WHEN CHANGING ALWAYS_EXCEPT!
-
-SRCDIR=$(dirname $0)
-PATH=$PWD/$SRCDIR:$SRCDIR:$SRCDIR/../utils:$PATH
 
 SIZE=${SIZE:-40960}
-CHECKSTAT=${CHECKSTAT:-"checkstat -v"}
 OPENFILE=${OPENFILE:-openfile}
 OPENUNLINK=${OPENUNLINK:-openunlink}
-export MULTIOP=${MULTIOP:-multiop}
 export TMP=${TMP:-/tmp}
 MOUNT_2=${MOUNT_2:-"yes"}
 CHECK_GRANT=${CHECK_GRANT:-"yes"}
 GRANT_CHECK_LIST=${GRANT_CHECK_LIST:-""}
 
-SAVE_PWD=$PWD
-
-export NAME=${NAME:-local}
-
-LUSTRE=${LUSTRE:-`dirname $0`/..}
+LUSTRE=${LUSTRE:-$(dirname $0)/..}
 . $LUSTRE/tests/test-framework.sh
-CLEANUP=${CLEANUP:-:}
-SETUP=${SETUP:-:}
 init_test_env $@
-. ${CONFIG:=$LUSTRE/tests/cfg/$NAME.sh}
 init_logging
 
-if [ $(facet_fstype $SINGLEMDS) = "zfs" ]; then
-# bug number for skipped test:
-	ALWAYS_EXCEPT="$ALWAYS_EXCEPT "
-# LU-2829 / LU-2887 - make allowances for ZFS slowness
+ALWAYS_EXCEPT="$SANITYN_EXCEPT "
+# bug number for skipped test:  LU-7105
+ALWAYS_EXCEPT+="                28"
+# UPDATE THE COMMENT ABOVE WITH BUG NUMBERS WHEN CHANGING ALWAYS_EXCEPT!
+
+if [ $mds1_FSTYPE = "zfs" ]; then
+	# bug number:    LU-15757 (test_102() causes crash in umount later)
+	ALWAYS_EXCEPT+=" 102"
+	# LU-2829 / LU-2887 - make allowances for ZFS slowness
 	TEST33_NFILES=${TEST33_NFILES:-1000}
 fi
+
 #                                  23   (min)"
 [ "$SLOW" = "no" ] && EXCEPT_SLOW="33a"
 
+build_test_filter
+
 FAIL_ON_ERROR=false
 
 SETUP=${SETUP:-:}
@@ -61,7 +54,33 @@ dd if=/dev/urandom of=$SAMPLE_FILE bs=1M count=1
 
 check_runas_id $RUNAS_ID $RUNAS_GID $RUNAS
 
-build_test_filter
+test_0() {
+	local client2=${CLIENT2:-$HOSTNAME}
+	local tmp=$(mktemp)
+
+	printf 'a b\n' > $tmp
+
+	do_node_vp "$HOSTNAME" printf 'a b\n' |
+	diff $tmp - || error "do_node_vp mismatch"
+
+	do_node_vp "$client2" printf 'a b\n' |
+	diff $tmp - || error "do_node_vp mismatch"
+
+	do_facet_vp mds1 printf 'a b\n' |
+	diff $tmp - || error "do_facet_vp mismatch"
+
+	printf '%s' 1 2 3 4 5 6 7 8 \ 9 10 ' ' '"' "'" \! \' \( \) $'\n' > $tmp
+
+	do_node_vp "$HOSTNAME" printf '%s' 1 2 3 4 5 6 7 8 \ 9 10 ' ' '"' "'" \! \' \( \) $'\n' |
+	diff $tmp - || error "do_node_vp mismatch"
+
+	do_node_vp "$client2" printf '%s' 1 2 3 4 5 6 7 8 \ 9 10 ' ' '"' "'" \! \' \( \) $'\n' |
+	diff $tmp - || error "do_node_vp mismatch"
+
+	do_facet_vp mds1 printf '%s' 1 2 3 4 5 6 7 8 \ 9 10 ' ' '"' "'" \! \' \( \) $'\n' |
+	diff $tmp - || error "do_facet_vp mismatch"
+}
+run_test 0 "do_node_vp() and do_facet_vp() do the right thing"
 
 test_1() {
 	touch $DIR1/$tfile
@@ -288,7 +307,7 @@ test_11() {
 run_test 11 "execution of file opened for write should return error ===="
 
 test_12() {
-	DIR=$DIR DIR2=$DIR2 sh lockorder.sh
+	DIR=$DIR DIR2=$DIR2 bash lockorder.sh
 }
 run_test 12 "test lock ordering (link, stat, unlink)"
 
@@ -315,73 +334,60 @@ test_14aa() {
 	MULTIPID=$!
 
 	$DIR2/$tdir/$tfile && error || true
-	kill -USR1 $MULTIPID
-	wait $MULTIPID || return 2
+	kill $MULTIPID
 }
 run_test 14aa "execution of file open for write returns -ETXTBSY"
 
 test_14ab() {
 	test_mkdir $DIR1/$tdir
-	cp -p $(which multiop) $DIR1/$tdir/multiop || error "cp failed"
-	MULTIOP_PROG=$DIR1/$tdir/multiop multiop_bg_pause $TMP/$tfile O_c ||
-		return 1
-	MULTIOP_PID=$!
-	$MULTIOP $DIR2/$tdir/multiop Oc && error "expected error, got success"
-	kill -USR1 $MULTIOP_PID || return 2
-	wait $MULTIOP_PID || return 3
-	rm $TMP/$tfile $DIR1/$tdir/multiop || error "removing multiop"
+	cp -p $(which sleep) $DIR1/$tdir/sleep || error "cp failed"
+	$DIR1/$tdir/sleep 60 &
+	SLEEP_PID=$!
+	$MULTIOP $DIR2/$tdir/sleep Oc && error "expected error, got success"
+	kill $SLEEP_PID
 }
 run_test 14ab "open(RDWR) of executing file returns -ETXTBSY"
 
 test_14b() { # bug 3192, 7040
 	test_mkdir $DIR1/$tdir
-	cp -p $(which multiop) $DIR1/$tdir/multiop || error "cp failed"
-	MULTIOP_PROG=$DIR1/$tdir/multiop multiop_bg_pause $TMP/$tfile O_c ||
-		return 1
-	MULTIOP_PID=$!
-	$TRUNCATE $DIR2/$tdir/multiop 0 && kill -9 $MULTIOP_PID && \
+	cp -p $(which sleep) $DIR1/$tdir/sleep || error "cp failed"
+	$DIR1/$tdir/sleep 60 &
+	SLEEP_PID=$!
+	$TRUNCATE $DIR2/$tdir/sleep 60 && kill -9 $SLEEP_PID && \
 		error "expected truncate error, got success"
-	kill -USR1 $MULTIOP_PID || return 2
-	wait $MULTIOP_PID || return 3
-	cmp $(which multiop) $DIR1/$tdir/multiop || error "binary changed"
-	rm $TMP/$tfile $DIR1/$tdir/multiop || error "removing multiop"
+	kill $SLEEP_PID
+	cmp $(which sleep) $DIR1/$tdir/sleep || error "binary changed"
 }
 run_test 14b "truncate of executing file returns -ETXTBSY ======"
 
 test_14c() { # bug 3430, 7040
 	test_mkdir $DIR1/$tdir
-	cp -p $(which multiop) $DIR1/$tdir/multiop || error "cp failed"
-	MULTIOP_PROG=$DIR1/$tdir/multiop multiop_bg_pause $TMP/$tfile O_c ||
-		return 1
-	MULTIOP_PID=$!
-	cp /etc/hosts $DIR2/$tdir/multiop && error "expected error, got success"
-	kill -USR1 $MULTIOP_PID || return 2
-	wait $MULTIOP_PID || return 3
-	cmp $(which multiop) $DIR1/$tdir/multiop || error "binary changed"
-	rm $TMP/$tfile $DIR1/$tdir/multiop || error "removing multiop"
+	cp -p $(which sleep) $DIR1/$tdir/sleep || error "cp failed"
+	$DIR1/$tdir/sleep 60 &
+	SLEEP_PID=$!
+	cp /etc/hosts $DIR2/$tdir/sleep && error "expected error, got success"
+	kill $SLEEP_PID
+	cmp $(which sleep) $DIR1/$tdir/sleep || error "binary changed"
 }
 run_test 14c "open(O_TRUNC) of executing file return -ETXTBSY =="
 
 test_14d() { # bug 10921
 	test_mkdir $DIR1/$tdir
-	cp -p $(which multiop) $DIR1/$tdir/multiop || error "cp failed"
-	MULTIOP_PROG=$DIR1/$tdir/multiop multiop_bg_pause $TMP/$tfile O_c ||
-		return 1
-	MULTIOP_PID=$!
+	cp -p $(which sleep) $DIR1/$tdir/sleep || error "cp failed"
+	$DIR1/$tdir/sleep 60 &
+	SLEEP_PID=$!
 	log chmod
-	chmod 600 $DIR1/$tdir/multiop || error "chmod failed"
-	kill -USR1 $MULTIOP_PID || return 2
-	wait $MULTIOP_PID || return 3
-	cmp $(which multiop) $DIR1/$tdir/multiop || error "binary changed"
-	rm $TMP/$tfile $DIR1/$tdir/multiop || error "removing multiop"
+	chmod 600 $DIR1/$tdir/sleep || error "chmod failed"
+	kill $SLEEP_PID
+	cmp $(which sleep) $DIR1/$tdir/sleep || error "binary changed"
 }
 run_test 14d "chmod of executing file is still possible ========"
 
 test_15() {	# bug 974 - ENOSPC
 	echo "PATH=$PATH"
-	sh oos2.sh $MOUNT1 $MOUNT2
+	bash oos2.sh $MOUNT1 $MOUNT2
 	wait_delete_completed
-	grant_error=`dmesg | grep "> available"`
+	grant_error=$(dmesg | grep "< tot_grant")
 	[ -z "$grant_error" ] || error "$grant_error"
 }
 run_test 15 "test out-of-space with multiple writers ==========="
@@ -390,7 +396,7 @@ COUNT=${COUNT:-2500}
 # The FSXNUM reduction for ZFS is needed until ORI-487 is fixed.
 # We don't want to skip it entirely, but ZFS is VERY slow and cannot
 # pass a 2500 operation dual-mount run within the time limit.
-if [ "$(facet_fstype ost1)" = "zfs" ]; then
+if [ "$ost1_FSTYPE" = "zfs" ]; then
 	FSXNUM=$((COUNT / 5))
 	FSXP=1
 elif [ "$SLOW" = "yes" ]; then
@@ -407,6 +413,8 @@ test_16a() {
 	local stripe_size=$(do_facet $SINGLEMDS \
 		"$LCTL get_param -n lod.$(facet_svc $SINGLEMDS)*.stripesize")
 
+	check_set_fallocate
+
 	# to allocate grant because it may run out due to test_15.
 	$LFS setstripe -c -1 $file1
 	dd if=/dev/zero of=$file1 bs=$stripe_size count=$OSTCOUNT oflag=sync
@@ -414,13 +422,13 @@ test_16a() {
 	rm -f $file1
 
 	$LFS setstripe -c -1 $file1 # b=10919
-	fsx -c 50 -p $FSXP -N $FSXNUM -l $((SIZE * 256)) -S 0 $file1 $file2 \
-		|| error "fsx failed"
+	$FSX -c 50 -p $FSXP -N $FSXNUM -l $((SIZE * 256)) -S 0 $file1 $file2 ||
+		error "fsx failed"
 	rm -f $file1
 
-	# O_DIRECT reads and writes must be aligned to the device block size.
-	fsx -c 50 -p $FSXP -N $FSXNUM -l $((SIZE * 256)) -S 0 -Z -r 4096 \
-		-w 4096 $file1 $file2 || error "fsx with O_DIRECT failed."
+	# O_DIRECT reads and writes must be aligned to the PAGE_SIZE.
+	$FSX -c 50 -p $FSXP -N $FSXNUM -l $((SIZE * 256)) -S 0 -Z -r $PAGE_SIZE \
+		-w $PAGE_SIZE $file1 $file2 || error "fsx with O_DIRECT failed."
 }
 run_test 16a "$FSXNUM iterations of dual-mount fsx"
 
@@ -428,28 +436,436 @@ run_test 16a "$FSXNUM iterations of dual-mount fsx"
 test_16b() {
 	local file1=$DIR1/$tfile
 	local file2=$DIR2/$tfile
+	local stripe_size=($($LFS getstripe -S $DIR))
+
+	check_set_fallocate
 
 	# to allocate grant because it may run out due to test_15.
 	lfs setstripe -c -1 $file1
-	dd if=/dev/zero of=$file1 bs=$STRIPE_BYTES count=$OSTCOUNT oflag=sync
-	dd if=/dev/zero of=$file2 bs=$STRIPE_BYTES count=$OSTCOUNT oflag=sync
+	dd if=/dev/zero of=$file1 bs=$stripe_size count=$OSTCOUNT oflag=sync ||
+		error "dd failed writing to file=$file1"
+	dd if=/dev/zero of=$file2 bs=$stripe_size count=$OSTCOUNT oflag=sync ||
+		error "dd failed writing to file=$file2"
 	rm -f $file1
 
 	lfs setstripe -c -1 $file1 # b=10919
 	# -o is set to 8192 because writes < 1 page and between 1 and 2 pages
 	# create a mix of tiny writes & normal writes
-	fsx -c 50 -p $FSXP -N $FSXNUM -l $((SIZE * 256)) -o 8192 -S 0 $file1 \
-	$file2
+	$FSX -c 50 -p $FSXP -N $FSXNUM -l $((SIZE * 256)) -o 8192 -S 0 \
+		$file1 $file2 || error "fsx with tiny write failed."
 }
 run_test 16b "$FSXNUM iterations of dual-mount fsx at small size"
 
+test_16c() {
+	local file1=$DIR1/$tfile
+	local file2=$DIR2/$tfile
+	local stripe_size=$(do_facet $SINGLEMDS \
+		"$LCTL get_param -n lod.$(facet_svc $SINGLEMDS)*.stripesize")
+
+	[ "$ost1_FSTYPE" != ldiskfs ] && skip "dio on ldiskfs only"
+
+	check_set_fallocate
+
+	# to allocate grant because it may run out due to test_15.
+	$LFS setstripe -c -1 $file1
+	dd if=/dev/zero of=$file1 bs=$stripe_size count=$OSTCOUNT oflag=sync
+	dd if=/dev/zero of=$file2 bs=$stripe_size count=$OSTCOUNT oflag=sync
+	rm -f $file1
+	wait_delete_completed
+
+	local list=$(comma_list $(osts_nodes))
+	if ! get_osd_param $list '' read_cache_enable >/dev/null; then
+		skip "not cache-capable obdfilter"
+	fi
+
+	set_osd_param $list '' read_cache_enable 0
+	set_osd_param $list '' writethrough_cache_enable 0
+
+	$LFS setstripe -c -1 $file1 # b=10919
+	$FSX -c 50 -p $FSXP -N $FSXNUM -l $((SIZE * 256)) -S 0 $file1 $file2 ||
+		error "fsx failed"
+	rm -f $file1
+
+	set_osd_param $list '' read_cache_enable 1
+	set_osd_param $list '' writethrough_cache_enable 1
+
+	return 0
+}
+run_test 16c "verify data consistency on ldiskfs with cache disabled (b=17397)"
+
+test_16d() {
+	local file1=$DIR1/$tfile
+	local file2=$DIR2/$tfile
+	local file3=$DIR1/file
+	local tmpfile=$(mktemp)
+	local stripe_size=$(do_facet $SINGLEMDS \
+		"$LCTL get_param -n lod.$(facet_svc $SINGLEMDS)*.stripesize")
+
+	# to allocate grant because it may run out due to test_15.
+	$LFS setstripe -c -1 $file1
+	stack_trap "rm -f $file1 $file2 $file3 $tmpfile"
+	dd if=/dev/zero of=$file1 bs=$stripe_size count=$OSTCOUNT oflag=sync
+	dd if=/dev/zero of=$file2 bs=$stripe_size count=$OSTCOUNT oflag=sync
+	rm -f $file1
+
+	$LFS setstripe -c -1 $file1 # b=10919
+	$LCTL set_param ldlm.namespaces.*.lru_size=clear
+
+	# direct write on one client and direct read from another
+	dd if=/dev/urandom of=$file1 bs=1M count=100 oflag=direct
+	dd if=$file2 of=$tmpfile iflag=direct bs=1M
+	diff $file1 $tmpfile || error "file different(1)"
+	rm -f $file1
+
+	# buffer write on one client, but direct read from another
+	dd if=$tmpfile of=$file1 bs=1M count=100
+	dd if=$file2 of=$file3 bs=1M iflag=direct count=100
+	diff $file3 $tmpfile || error "file different(2)"
+
+	rm -f $file3 $file2 $file1
+	# direct write on one client
+	dd if=$tmpfile of=$file1 bs=1M count=100 oflag=direct
+	# buffer read from another client
+	dd if=$file2 of=$file3 bs=1M count=100
+	diff $file3 $tmpfile || error "file different(3)"
+}
+run_test 16d "Verify DIO and buffer IO with two clients"
+
+test_16e() { # LU-13227
+	# issue:	LU-14314
+
+	(( "$MDS1_VERSION" >= $(version_code 2.13.53) )) ||
+		skip "Need MDS version at least 2.13.53"
+
+	local file1=$DIR1/$tfile
+	local file2=$DIR2/$tfile
+
+	# client1 write 10M data
+	dd if=/dev/zero of=$file1 bs=1M count=10
+	# drop locks
+	cancel_lru_locks osc > /dev/null
+	# use lockahead to generate one PW lock to keep LVB loaded.
+	$LFS ladvise -a lockahead --start 0 --length 1M \
+		--mode WRITE $file1
+	# direct write to extend file size on client2
+	dd if=/dev/zero of=$file2 bs=1M seek=20 count=1 \
+		oflag=direct conv=notrunc
+	local filesize=$(stat -c %s $file2)
+	[ "$filesize" -eq 22020096 ] ||
+		error "expected filesize 22020096 got $filesize"
+	rm -f $file1
+}
+run_test 16e "Verify size consistency for O_DIRECT write"
+
+test_16f() { # LU-14541
+	local file1=$DIR1/$tfile
+	local file2=$DIR2/$tfile
+	local duration=20
+	local status
+
+	(( $MDS1_VERSION > $(version_code 2.15.51) )) ||
+		skip "Need MDS version at least 2.15.51"
+
+	timeout --preserve-status --signal=USR1 $duration \
+		rw_seq_cst_vs_drop_caches $file1 $file2
+	status=$?
+
+	case $((status & 0x7f)) in
+		0)
+			echo OK # Computers must be fast now.
+			;;
+		6) # SIGABRT
+			error "sequential consistency violation detected"
+			;;
+		10) # SIGUSR1
+			echo TIMEOUT # This is fine.
+			;;
+		*)
+			error "strange status '$status'"
+			;;
+	esac
+
+	rm -f $file1
+}
+run_test 16f "rw sequential consistency vs drop_caches"
+
+test_16g() {
+	local file1=$DIR1/$tfile
+	local file2=$DIR2/$tfile
+	local duration=20
+	local status
+
+	timeout --preserve-status --signal=USR1 $duration \
+		rw_seq_cst_vs_drop_caches -m $file1 $file2
+	status=$?
+
+	case $((status & 0x7f)) in
+		0)
+			echo OK # Computers must be fast now.
+			;;
+		6) # SIGABRT
+			error "sequential consistency violation detected"
+			;;
+		10) # SIGUSR1
+			echo TIMEOUT # This is fine.
+			;;
+		*)
+			error "strange status '$status'"
+			;;
+	esac
+
+	rm -f $file1
+}
+run_test 16g "mmap rw sequential consistency vs drop_caches"
+
+test_16h() {
+	local tf=$DIR/$tdir/$tfile
+	local tf2=$DIR2/$tdir/$tfile
+	local cmd="$MMAP_CAT $tf | od -x | tail -q -n4"
+	local cmd2="$MMAP_CAT $tf2 | od -x | tail -q -n4"
+
+	test_mkdir $DIR/$tdir
+
+	# create file and populate data
+	cp /etc/passwd $tf || error "cp failed"
+
+	local size=$(stat -c %s $tf)
+	c1=$(eval $cmd)
+	c2=$(eval $cmd2)
+	if [[ "$c1" != "$c2" ]]; then
+		echo "  ------- mount 1 read --------"
+		echo $c1
+		echo "  ------- mount 2 read --------"
+		echo $c2
+		error "content mismatch"
+	fi
+
+	echo "  ------- before truncate --------"
+	echo $c1
+
+	# truncate file
+	$TRUNCATE $tf $((size / 2)) || error "truncate file"
+
+	#cancel_lru_locks
+	echo "  ------- after truncate --------"
+
+	# repeat the comparison
+	c1=$(eval $cmd)
+	c2=$(eval $cmd2)
+	if [[ "$c1" != "$c2" ]]; then
+		echo "  ------- mount 1 read --------"
+		echo $c1
+		echo "  ------- mount 2 read --------"
+		echo $c2
+		error "content mismatch after truncate"
+	fi
+	echo $c2
+}
+run_test 16h "mmap read after truncate file"
+
+test_16i() {
+	local tf=$DIR/$tdir/$tfile
+	local tf2=$DIR2/$tdir/$tfile
+
+	test_mkdir $DIR/$tdir
+
+	# create file and populate data
+	cp /etc/passwd $tf || error "cp failed"
+
+	local size=$(stat -c %s $tf)
+
+	c1=$(dd if=$tf bs=1 2>/dev/null | od -x | tail -q -n4)
+	c2=$(dd if=$tf2 bs=1 2>/dev/null | od -x | tail -q -n4)
+
+	if [[ "$c1" != "$c2" ]]; then
+		echo "  ------- mount 1 read --------"
+		echo $c1
+		echo "  ------- mount 2 read --------"
+		echo $c2
+		error "content mismatch"
+	fi
+
+	echo "  ------- before truncate --------"
+	echo $c1
+
+	# truncate file
+	$TRUNCATE $tf $((size / 2)) || error "truncate file"
+
+	echo "  ------- after truncate --------"
+
+	# repeat the comparison
+	c1=$(dd if=$tf bs=1 2>/dev/null | od -x | tail -q -n4)
+	c2=$(dd if=$tf2 bs=1 2>/dev/null | od -x | tail -q -n4)
+
+	if [[ "$c1" != "$c2" ]]; then
+		echo "  ------- mount 1 read --------"
+		echo $c1
+		echo "  ------- mount 2 read --------"
+		echo $c2
+		error "content mismatch after truncate"
+	fi
+	echo $c2
+}
+run_test 16i "read after truncate file"
+
+test_16j()
+{
+	(( $OSTCOUNT >= 2 )) || skip "needs >= 2 OSTs"
+
+	local stripe_size=$((1024 * 1024)) #1 MiB
+	# Max i/o below is ~ 4 * stripe_size, so this gives ~5 i/os
+	local file_size=$((25 * stripe_size))
+	local bsizes
+
+	$LFS setstripe -c 2 -S $stripe_size $DIR/$tfile.1
+	stack_trap "rm -f $DIR/$tfile.1"
+
+	# Just a bit bigger than the largest size in the test set below
+	dd if=/dev/urandom bs=$file_size count=1 of=$DIR/$tfile.1 ||
+		error "buffered i/o to create file failed"
+
+	if zfs_or_rotational; then
+		# DIO on ZFS can take up to 2 seconds per IO
+		# rotational is better, but still slow.
+		# Limit testing on those media to larger sizes
+		bsizes="$((stripe_size - PAGE_SIZE)) $stripe_size \
+			$((stripe_size + 1024))"
+	else
+		bsizes="$((PAGE_SIZE / 4)) $((PAGE_SIZE - 1024)) \
+			$((PAGE_SIZE - 1)) $PAGE_SIZE $((PAGE_SIZE + 1024)) \
+			$((PAGE_SIZE * 3/2)) $((PAGE_SIZE * 4)) \
+			$((stripe_size - 1)) $stripe_size \
+			$((stripe_size + 1)) $((stripe_size * 3/2)) \
+			$((stripe_size * 4)) $((stripe_size * 4 + 1))"
+	fi
+
+	# 1 process (BIO or DIO) on each client
+	for bs in $bsizes; do
+		$LFS setstripe -c 2 -S $stripe_size $DIR/$tfile.2
+		echo "bs: $bs, file_size $file_size"
+		dd if=$DIR/$tfile.1 bs=$((bs *2 )) of=$DIR/tfile.2 \
+			conv=notrunc oflag=direct iflag=direct &
+		pid_dio1=$!
+		# Buffered I/O with similar but not the same block size
+		dd if=$DIR2/$tfile.1 bs=$((bs * 2)) of=$DIR2/$tfile.2 \
+			conv=notrunc &
+		pid_bio2=$!
+		wait $pid_dio1
+		rc1=$?
+		wait $pid_bio2
+		rc2=$?
+		if (( rc1 != 0 )); then
+			error "dio copy 1 w/bsize $bs failed: $rc1"
+		fi
+		if (( rc2 != 0 )); then
+			error "buffered copy 2 w/bsize $bs failed: $rc2"
+		fi
+
+		$CHECKSTAT -t file -s $file_size $DIR/$tfile.2 ||
+			error "size incorrect"
+		$CHECKSTAT -t file -s $file_size $DIR2/$tfile.2 ||
+			error "size incorrect - mount 2"
+		cmp --verbose $DIR/$tfile.1 $DIR/$tfile.2 ||
+			error "files differ, bsize $bs"
+		cmp --verbose $DIR2/$tfile.1 $DIR2/$tfile.2 ||
+			error "files differ, bsize $bs - mount 2"
+		rm -f $DIR/$tfile.2
+	done
+
+	# 2 processes - both DIO and BIO - on each client
+	for bs in $bsizes; do
+		$LFS setstripe -c 2 -S $stripe_size $DIR/$tfile.2
+		echo "bs: $bs, file_size $file_size"
+		# Client 1
+		dd if=$DIR/$tfile.1 bs=$((bs *2 )) of=$DIR/tfile.2 \
+			conv=notrunc oflag=direct iflag=direct &
+		pid_dio1=$!
+		# Buffered I/O with similar but not the same block size
+		dd if=$DIR/$tfile.1 bs=$((bs * 2)) of=$DIR/$tfile.2 \
+			conv=notrunc &
+		pid_bio2=$!
+		# Client 2
+		dd if=$DIR2/$tfile.1 bs=$((bs *2 )) of=$DIR2/tfile.2 \
+			conv=notrunc oflag=direct iflag=direct &
+		pid_dio3=$!
+		# Buffered I/O with similar but not the same block size
+		dd if=$DIR2/$tfile.1 bs=$((bs * 2)) of=$DIR2/$tfile.2 \
+			conv=notrunc &
+		pid_bio4=$!
+		wait $pid_dio1
+		rc1=$?
+		wait $pid_bio2
+		rc2=$?
+		wait $pid_dio3
+		rc3=$?
+		wait $pid_bio4
+		rc4=$?
+
+		if (( rc1 != 0 )); then
+			error "dio copy 1 w/bsize $bs failed: $rc1"
+		fi
+		if (( rc2 != 0 )); then
+			error "buffered copy 2 w/bsize $bs failed: $rc2"
+		fi
+		if (( rc3 != 0 )); then
+			error "dio copy 3 w/bsize $bs failed: $rc1"
+		fi
+		if (( rc4 != 0 )); then
+			error "buffered copy 4 w/bsize $bs failed: $rc2"
+		fi
+
+		$CHECKSTAT -t file -s $file_size $DIR/$tfile.2 ||
+			error "size incorrect"
+		$CHECKSTAT -t file -s $file_size $DIR2/$tfile.2 ||
+			error "size incorrect - mount 2"
+		cmp --verbose $DIR/$tfile.1 $DIR/$tfile.2 ||
+			error "files differ, bsize $bs"
+		cmp --verbose $DIR2/$tfile.1 $DIR2/$tfile.2 ||
+			error "files differ, bsize $bs - mount 2"
+		rm -f $DIR/$tfile.2
+	done
+}
+run_test 16j "race dio with buffered i/o"
+
+test_16k() {
+	local fsxN=${FSX_NP:-5}
+	local fsxNops=${FSX_NOPS:-10000}
+	local fsxNparams=${FSXPARAMS_16k:-""}
+	local dropsleep=${DROP_SLEEP:-3}
+	local dpipd
+	local -a fsxpids
+	local cmd
+
+	[ "$SLOW" = "no" ] && fsxNops=1000
+
+	while true; do
+		echo 3 > /proc/sys/vm/drop_caches
+		sleep $dropsleep
+	done &
+	dpipd=$!
+	stack_trap "kill -9 $dpipd"
+
+	for ((i = 1; i <= fsxN; i++)); do
+		cmd="$FSX $fsxNparams -N $fsxNops $DIR/fsxfile.${i} -l $((64 * 1024 * 1024))"
+		echo "+ $cmd"
+		eval $cmd &
+		fsxpids[$i]=$!
+	done
+	for ((i = 1; i <= fsxN; i++)); do
+		wait ${fsxpids[$i]} && echo "+ fsx $i done: rc=$?" ||
+			error "- fsx $i FAILURE! rc=$?"
+		date
+	done
+}
+run_test 16k "Parallel FSX and drop caches should not panic"
+
 test_17() { # bug 3513, 3667
 	remote_ost_nodsh && skip "remote OST with nodsh" && return
 
 	lfs setstripe $DIR1/$tfile -i 0 -c 1
 	cp $SAMPLE_FILE $DIR1/$tfile
 	cancel_lru_locks osc > /dev/null
-	#define OBD_FAIL_ONCE|OBD_FAIL_LDLM_CREATE_RESOURCE    0x30a
+	#define CFS_FAIL_ONCE|OBD_FAIL_LDLM_CREATE_RESOURCE    0x30a
 	do_facet ost1 lctl set_param fail_loc=0x8000030a
 	ls -ls $DIR1/$tfile | awk '{ print $1,$6 }' > $DIR1/$tfile-1 & \
 	ls -ls $DIR2/$tfile | awk '{ print $1,$6 }' > $DIR2/$tfile-2
@@ -469,25 +885,27 @@ test_18() {
                 excepts="$excepts -e $(($(printf %d \'$idx)-96))"
         done
 
-	$LUSTRE/tests/mmap_sanity -d $MOUNT1 -m $MOUNT2 $excepts
+	excepts="$excepts -e 7 -e 8 -e 9"
+	$LUSTRE/tests/mmap_sanity -d $MOUNT1 -m $MOUNT2 $excepts ||
+		error "mmap_sanity test failed"
 	sync; sleep 1; sync
 }
 run_test 18 "mmap sanity check ================================="
 
 test_19() { # bug3811
 	local node=$(facet_active_host ost1)
+	local device="$FSNAME-OST*"
 
-	[ "x$DOM" = "xyes" ] && node=$(facet_active_host $SINGLEMDS)
+	[ "x$DOM" = "xyes" ] && node=$(facet_active_host $SINGLEMDS) &&
+		device="$FSNAME-MDT*"
 
 	# check whether obdfilter is cache capable at all
-	if ! get_osd_param $node '' read_cache_enable >/dev/null; then
-		echo "not cache-capable obdfilter"
-		return 0
-	fi
+	get_osd_param $node $device read_cache_enable >/dev/null ||
+		skip "not cache-capable obdfilter"
 
-	local MAX=$(get_osd_param $node '' readcache_max_filesize | \
-		    head -n 1)
-	set_osd_param $node '' readcache_max_filesize 4096
+	local max=$(get_osd_param $node $device readcache_max_filesize |\
+		head -n 1)
+	set_osd_param $node $device readcache_max_filesize 4096
 	dd if=/dev/urandom of=$TMP/$tfile bs=512k count=32
 	local SUM=$(cksum $TMP/$tfile | cut -d" " -f 1,2)
 	cp $TMP/$tfile $DIR1/$tfile
@@ -502,22 +920,22 @@ test_19() { # bug3811
 		[ "$(cat $TMP/sum2)" = "$SUM" ] || \
 			error "$DIR2/$tfile $(cat $TMP/sum2) != $SUM"
 	done
-	set_osd_param $node '' readcache_max_filesize $MAX
+	set_osd_param $node $device readcache_max_filesize $max
 	rm $DIR1/$tfile
 }
 run_test 19 "test concurrent uncached read races ==============="
 
 test_20() {
-	test_mkdir $DIR1/d20
-	cancel_lru_locks $OSC
-	CNT=$((`lctl get_param -n llite.*.dump_page_cache | wc -l`))
-	$MULTIOP $DIR1/f20 Ow8190c
-	$MULTIOP $DIR2/f20 Oz8194w8190c
-	$MULTIOP $DIR1/f20 Oz0r8190c
-	cancel_lru_locks $OSC
-	CNTD=$((`lctl get_param -n llite.*.dump_page_cache | wc -l` - $CNT))
-	[ $CNTD -gt 0 ] && \
-	    error $CNTD" page left in cache after lock cancel" || true
+	test_mkdir $DIR1/$tdir
+	cancel_lru_locks
+	CNT=$($LCTL get_param -n llite.*.dump_page_cache | wc -l)
+	$MULTIOP $DIR1/$tdir/$tfile Ow8190c
+	$MULTIOP $DIR2/$tdir/$tfile Oz8194w8190c
+	$MULTIOP $DIR1/$tdir/$tfile Oz0r8190c
+	cancel_lru_locks
+	CNT2=$($LCTL get_param -n llite.*.dump_page_cache | wc -l)
+	[[ $CNT2 == $CNT ]] ||
+		error $((CNT2 - CNT))" page left in cache after lock cancel"
 }
 run_test 20 "test extra readahead page left in cache ===="
 
@@ -668,12 +1086,37 @@ test_26b() {
 }
 run_test 26b "sync mtime between ost and mds"
 
+test_26c() {
+	(( $MDS1_VERSION >= $(version_code 2.15.61) )) ||
+		skip "Need MDS version at least 2.15.61"
+
+	multiop_bg_pause $DIR1/$tfile O_c || error "multiop failed"
+	MULTIPID=$!
+	touch -am -d @978261179 $DIR2/$tfile
+	kill -USR1 $MULTIPID
+	wait $MULTIPID || error "wait for PID $MULTIPID failed"
+	sleep 1
+
+	echo
+	stat $DIR/$tfile
+	local times="$(stat -c"%X %Y" $DIR/$tfile)"
+	[[ "$times" == "978261179 978261179" ]] ||
+		error "[am]times are not set in past on $DIR: $times"
+	echo
+	stat $DIR2/$tfile
+	local times="$(stat -c"%X %Y" $DIR2/$tfile)"
+	[[ "$times" == "978261179 978261179" ]] ||
+		error "[am]times are not set in past on $DIR2: $times"
+	echo
+}
+run_test 26c "set-in-past on open file is not lost on close"
+
 test_27() {
 	cancel_lru_locks $OSC
 	lctl clear
 	dd if=/dev/zero of=$DIR2/$tfile bs=$((4096+4))k conv=notrunc count=4 seek=3 &
 	DD2_PID=$!
-	usleep 50
+	sleep 0.5
 	log "dd 1 started"
 
 	dd if=/dev/zero of=$DIR1/$tfile bs=$((16384-1024))k conv=notrunc count=1 seek=4 &
@@ -690,47 +1133,14 @@ test_27() {
 run_test 27 "align non-overlapping extent locks from request ==="
 
 test_28() { # bug 9977
-	ECHO_UUID="ECHO_osc1_UUID"
-	tOST=$($LCTL dl | awk '/-osc-|OSC.*MNT/ { print $4 }' | head -n1)
-
-	$LFS setstripe $DIR1/$tfile -S 1048576 -i 0 -c 2
-	tOBJID=`$LFS getstripe $DIR1/$tfile | awk '$1 == 1 {print $2}'`
-	dd if=/dev/zero of=$DIR1/$tfile bs=1024k count=2
-
-	$LCTL <<-EOF
-		newdev
-		attach echo_client ECHO_osc1 $ECHO_UUID
-		setup $tOST
-	EOF
-
-	tECHOID=`$LCTL dl | grep $ECHO_UUID | awk '{ print $1 }'`
-	$LCTL --device $tECHOID destroy "${tOBJID}:0"
-
-    	$LCTL <<-EOF
-		cfg_device ECHO_osc1
-		cleanup
-		detach
-	EOF
-
-	# reading of 1st stripe should pass
-	dd if=$DIR2/$tfile of=/dev/null bs=1024k count=1 || error "dd failed"
-	# reading of 2nd stripe should fail (this stripe was destroyed)
-	dd if=$DIR2/$tfile of=/dev/null bs=1024k count=1 skip=1 && error
-
-	# now, recreating test file
-	dd if=/dev/zero of=$DIR1/$tfile bs=1024k count=2 || error "dd failed"
-	# reading of 1st stripe should pass
-	dd if=$DIR2/$tfile of=/dev/null bs=1024k count=1 || error "dd failed"
-	# reading of 2nd stripe should pass
-	dd if=$DIR2/$tfile of=/dev/null bs=1024k count=1 skip=1 ||
-		error "dd failed"
+	skip "echo_client on osc is no longer supported"
 }
 run_test 28 "read/write/truncate file with lost stripes"
 
 test_30() { #b=11110, LU-2523
 	test_mkdir $DIR1/$tdir
 	cp -f /bin/bash $DIR1/$tdir/bash
-	/bin/sh -c 'sleep 1; rm -f $DIR2/$tdir/bash; cp /bin/bash $DIR2/$tdir' &
+	bash -c 'sleep 1; rm -f $DIR2/$tdir/bash; cp /bin/bash $DIR2/$tdir' &
 	$DIR1/$tdir/bash -c 'sleep 2;
 		openfile -f O_RDONLY /proc/$$/exe >& /dev/null; echo $?'
 	wait
@@ -774,50 +1184,29 @@ test_31b() {
 }
 run_test 31b "voluntary OST cancel / blocking ast race=============="
 
-# enable/disable lockless truncate feature, depending on the arg 0/1
-enable_lockless_truncate() {
-	lctl set_param -n $OSC.*.lockless_truncate $1
-}
-
-test_32a() { # bug 11270
-	local p="$TMP/$TESTSUITE-$TESTNAME.parameters"
-	local stripe_size=$(do_facet $SINGLEMDS \
-		"$LCTL get_param -n lod.$(facet_svc $SINGLEMDS)*.stripesize")
+#LU-14949 - multi-client version of the test 31r in sanity.
+test_31r() {
+	touch $DIR/$tfile.target
+	touch $DIR/$tfile.source
 
-	save_lustre_params client "$OSC.*.lockless_truncate" > $p
-	cancel_lru_locks $OSC
-	enable_lockless_truncate 1
-	rm -f $DIR1/$tfile
-	lfs setstripe -c -1 $DIR1/$tfile
-	dd if=/dev/zero of=$DIR1/$tfile count=$OSTCOUNT bs=$stripe_size > \
-		/dev/null 2>&1
-	clear_stats $OSC.*.${OSC}_stats
+	ls -l $DIR/$tfile.target # cache it for sure
 
-	log "checking cached lockless truncate"
-	$TRUNCATE $DIR1/$tfile 8000000
-	$CHECKSTAT -s 8000000 $DIR2/$tfile || error "wrong file size"
-	[ $(calc_stats $OSC.*.${OSC}_stats lockless_truncate) -ne 0 ] ||
-		error "cached truncate isn't lockless"
+	#OBD_FAIL_LLITE_OPEN_DELAY 0x1419
+	$LCTL set_param fail_loc=0x1419 fail_val=3
+	cat $DIR/$tfile.target &
+	CATPID=$!
 
-	log "checking not cached lockless truncate"
-	$TRUNCATE $DIR2/$tfile 5000000
-	$CHECKSTAT -s 5000000 $DIR1/$tfile || error "wrong file size"
-	[ $(calc_stats $OSC.*.${OSC}_stats lockless_truncate) -ne 0 ] ||
-		error "not cached truncate isn't lockless"
+	# Guarantee open is waiting before we get here
+	sleep 1
+	mv $DIR2/$tfile.source $DIR2/$tfile.target
 
-	log "disabled lockless truncate"
-	enable_lockless_truncate 0
-	clear_stats $OSC.*.${OSC}_stats
-	$TRUNCATE $DIR2/$tfile 3000000
-	$CHECKSTAT -s 3000000 $DIR1/$tfile || error "wrong file size"
-	[ $(calc_stats $OSC.*.${OSC}_stats lockless_truncate) -eq 0 ] ||
-		error "lockless truncate disabling failed"
-	rm $DIR1/$tfile
-	# restore lockless_truncate default values
-	restore_lustre_params < $p
-	rm -f $p
+	wait $CATPID
+	RC=$?
+	if [[ $RC -ne 0 ]]; then
+		error "open with cat failed, rc=$RC"
+	fi
 }
-run_test 32a "lockless truncate"
+run_test 31r "open-rename(replace) race"
 
 test_32b() { # bug 11270
 	remote_ost_nodsh && skip "remote OST with nodsh" && return
@@ -870,75 +1259,76 @@ test_32b() { # bug 11270
 	restore_lustre_params <$p
 	rm -f $p
 }
-run_test 32b "lockless i/o"
+# Disable test 32b prior to full removal
+#run_test 32b "lockless i/o"
 
 print_jbd_stat () {
-    local dev
-    local mdts=$(get_facets MDS)
-    local varcvs
-    local mds
-
-    local stat=0
-    for mds in ${mdts//,/ }; do
-        varsvc=${mds}_svc
-        dev=$(basename $(do_facet $mds "lctl get_param -n osd*.${!varsvc}.mntdev|\
-		xargs readlink -f" ))
-	val=$(do_facet $mds "cat /proc/fs/jbd*/${dev}{,:*,-*}/info 2>/dev/null |
-		head -n1")
-        val=${val%% *};
-        stat=$(( stat + val))
-    done
-    echo $stat
+	local mdts=$(get_facets MDS)
+	local stat=0
+	local varsvc
+	local dev
+	local mds
+
+	for mds in ${mdts//,/ }; do
+		varsvc=${mds}_svc
+
+		dev=$(basename $(do_facet $mds "lctl get_param -n \
+			osd*.${!varsvc}.mntdev | xargs readlink -f"))
+		val=$(do_facet $mds "cat /proc/fs/jbd*/${dev}{,:*,-*}/info \
+			2>/dev/null | head -n1")
+		val=${val%% *};
+		stat=$((stat + val))
+	done
+	echo $stat
 }
 
 # commit on sharing tests
 test_33a() {
-    remote_mds_nodsh && skip "remote MDS with nodsh" && return
+	remote_mds_nodsh && skip "remote MDS with nodsh" && return
 
-    [ -z "$CLIENTS" ] && skip "Need two or more clients, have $CLIENTS" && return 0
-    [ $CLIENTCOUNT -lt 2 ] &&
-	skip "Need two or more clients, have $CLIENTCOUNT" && return 0
+	[ $CLIENTCOUNT -lt 2 ] &&
+		skip "Need two or more clients, have $CLIENTCOUNT"
 
-    local nfiles=${TEST33_NFILES:-10000}
-    local param_file=$TMP/$tfile-params
-    local fstype=$(facet_fstype $SINGLEMDS)
+	local nfiles=${TEST33_NFILES:-10000}
+	local param_file=$TMP/$tfile-params
+	local COS
+	local jbdold="N/A"
+	local jbdnew="N/A"
+	local jbd
 
 	save_lustre_params $(get_facets MDS) \
 		"mdt.*.commit_on_sharing" > $param_file
 
-    local COS
-    local jbdold="N/A"
-    local jbdnew="N/A"
-    local jbd
-
-    for COS in 0 1; do
-        do_facet $SINGLEMDS lctl set_param mdt.*.commit_on_sharing=$COS
-        avgjbd=0
-        avgtime=0
-        for i in 1 2 3; do
-            do_nodes $CLIENT1,$CLIENT2 "mkdir -p $DIR1/$tdir-\\\$(hostname)-$i"
-
-            [ $fstype = ldiskfs ] && jbdold=$(print_jbd_stat)
-            echo "=== START createmany old: $jbdold transaction"
-            local elapsed=$(do_and_time "do_nodes $CLIENT1,$CLIENT2 createmany -o $DIR1/$tdir-\\\$(hostname)-$i/f- -r$DIR2/$tdir-\\\$(hostname)-$i/f- $nfiles > /dev/null 2>&1")
-            [ $fstype = ldiskfs ] && jbdnew=$(print_jbd_stat)
-            [ $fstype = ldiskfs ] && jbd=$(( jbdnew - jbdold ))
-            echo "=== END   createmany new: $jbdnew transaction :  $jbd transactions  nfiles $nfiles time $elapsed COS=$COS"
-            [ $fstype = ldiskfs ] && avgjbd=$(( avgjbd + jbd ))
-            avgtime=$(( avgtime + elapsed ))
-        done
-        eval cos${COS}_jbd=$((avgjbd / 3))
-        eval cos${COS}_time=$((avgtime / 3))
-    done
+	for COS in 0 1; do
+		do_facet $SINGLEMDS lctl set_param mdt.*.commit_on_sharing=$COS
+		avgjbd=0
+		avgtime=0
+		for i in 1 2 3; do
+			do_nodes $CLIENT1,$CLIENT2 "mkdir -p $DIR1/$tdir-\\\$(hostname)-$i"
+
+		[ "$mds1_FSTYPE" = ldiskfs ] && jbdold=$(print_jbd_stat)
+		echo "=== START createmany old: $jbdold transaction"
+		local elapsed=$(do_and_time "do_nodes $CLIENT1,$CLIENT2 createmany -o $DIR1/$tdir-\\\$(hostname)-$i/f- -r$DIR2/$tdir-\\\$(hostname)-$i/f- $nfiles > /dev/null 2>&1")
+		[ "$mds1_FSTYPE" = ldiskfs ] && jbdnew=$(print_jbd_stat)
+		[ "$mds1_FSTYPE" = ldiskfs ] && jbd=$(( jbdnew - jbdold ))
+		echo "=== END   createmany new: $jbdnew transaction :  $jbd transactions  nfiles $nfiles time $elapsed COS=$COS"
+		[ "$mds1_FSTYPE" = ldiskfs ] && avgjbd=$(( avgjbd + jbd ))
+		avgtime=$(( avgtime + elapsed ))
+		done
+	eval cos${COS}_jbd=$((avgjbd / 3))
+	eval cos${COS}_time=$((avgtime / 3))
+	done
 
-    echo "COS=0 transactions (avg): $cos0_jbd  time (avg): $cos0_time"
-    echo "COS=1 transactions (avg): $cos1_jbd  time (avg): $cos1_time"
-    [ "$cos0_jbd" != 0 ] && echo "COS=1 vs COS=0 jbd:  $((((cos1_jbd/cos0_jbd - 1)) * 100 )) %"
-    [ "$cos0_time" != 0 ] && echo "COS=1 vs COS=0 time: $((((cos1_time/cos0_time - 1)) * 100 )) %"
+	echo "COS=0 transactions (avg): $cos0_jbd  time (avg): $cos0_time"
+	echo "COS=1 transactions (avg): $cos1_jbd  time (avg): $cos1_time"
+	[ "$cos0_jbd" != 0 ] &&
+		echo "COS=1 vs COS=0 jbd:  $((((cos1_jbd/cos0_jbd - 1)) * 100 )) %"
+	[ "$cos0_time" != 0 ] &&
+		echo "COS=1 vs COS=0 time: $((((cos1_time/cos0_time - 1)) * 100 )) %"
 
-    restore_lustre_params < $param_file
-    rm -f $param_file
-    return 0
+	restore_lustre_params < $param_file
+	rm -f $param_file
+	return 0
 }
 run_test 33a "commit on sharing, cross crete/delete, 2 clients, benchmark"
 
@@ -946,7 +1336,6 @@ run_test 33a "commit on sharing, cross crete/delete, 2 clients, benchmark"
 test_33b() {
 	remote_mds_nodsh && skip "remote MDS with nodsh" && return
 
-	[ -n "$CLIENTS" ] || { skip "Need two or more clients" && return 0; }
 	[ $CLIENTCOUNT -ge 2 ] ||
 		{ skip "Need two or more clients, have $CLIENTCOUNT" &&
 								return 0; }
@@ -1002,41 +1391,94 @@ test_33b() {
 }
 run_test 33b "COS: cross create/delete, 2 clients, benchmark under remote dir"
 
-test_33c() {
-	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.7.63) ] &&
-		skip "DNE CoS not supported" && return
-
+# arg1 is description, arg2 is operations before Sync-on-Lock-Cancel, arg3 is
+# the operation that triggers SoLC
+op_trigger_solc() {
 	local sync_count
+	local total=0
+	local nodes=$(comma_list $(mdts_nodes))
 
-	mkdir $DIR/$tdir
 	sync_all_data
-	do_facet mds1 "lctl set_param -n mdt.*.sync_count=0"
-	# do twice in case transaction is committed before unlock, see LU-8200
+
+	# trigger CoS twice in case transaction commit before unlock
 	for i in 1 2; do
-		# remote dir is created on MDT1, which enqueued lock of $tdir on
-		# MDT0
-		$LFS mkdir -i 1 $DIR/$tdir/remote.$i
-		mkdir $DIR/$tdir/local.$i
+		bash -c "$2"
+		do_nodes $nodes "$LCTL set_param -n mdt.*.sync_count=0"
+		bash -c "$3"
+		sync_count=$(do_nodes $nodes \
+			"lctl get_param -n mdt.*MDT*.sync_count" | calc_sum)
+		total=$((total + sync_count));
+		rm -rf $DIR/$tdir/*
+		sync_all_data
 	done
-	sync_count=$(do_facet mds1 "lctl get_param -n mdt.*MDT0000.sync_count")
-	echo "sync_count $sync_count"
-	[ $sync_count -eq 0 ] && error "Sync-Lock-Cancel not triggered"
 
+	echo $1
+	echo "  $2"
+	echo "  $3"
+	echo "  SoLC count $total"
+	(( total > 0 )) || error "$3 didn't trigger SoLC"
+}
+
+test_33_run() {
+	echo $1
+	echo "  $2"
+	eval $2
+}
+
+test_33c() {
+	(( MDSCOUNT >= 2 )) || skip "needs >= 2 MDTs"
+	(( MDS1_VERSION >= $(version_code 2.7.63) )) ||
+		skip "DNE CoS not supported"
+
+	# LU-13522
+	stop mds1
+	start mds1 $(mdsdevname 1) $MDS_MOUNT_OPTS || error "start mds1 failed"
+
+	mkdir_on_mdt0 $DIR/$tdir
+	sync_all_data
+
+	if (( MDS1_VERSION < $(version_code 2.15.55.204) )); then
+		op_trigger_solc "create remote dir and local dir" \
+			"$LFS mkdir -i 1 $DIR/$tdir/remote" \
+			"$LFS mkdir -i 0 $DIR/$tdir/local"
+		(( MDSCOUNT > 2 )) &&
+		op_trigger_solc "create remote dirs on different MDTs" \
+			"$LFS mkdir -i 1 $DIR/$tdir/remote.1" \
+			"$LFS mkdir -i 2 $DIR/$tdir/remote.2"
+	fi
+	op_trigger_solc "create file on 2nd stripe under striped directory" \
+		"$LFS mkdir -i 0 -c 2 $DIR/$tdir/striped" \
+		"touch $DIR2/$tdir/striped/subfile"
+
+	echo
+	echo "Below operations shouldn't trigger Solc:"
+	$LFS mkdir -i 0 -c 2 $DIR/$tdir/striped
 	sync_all_data
 	do_facet mds1 "lctl set_param -n mdt.*.sync_count=0"
-	$LFS mkdir -i 1 $DIR/$tdir/remote.3
-	# during sleep remote mkdir should have been committed and canceled
-	# remote lock spontaneously, which shouldn't trigger sync
-	sleep 6
-	mkdir $DIR/$tdir/local.3
+	if (( MDS1_VERSION >= $(version_code 2.15.55.204) )); then
+		test_33_run "create file on 2nd stripe after setattr" \
+			"chmod 777 $DIR/$tdir/striped; \
+			 touch $DIR2/$tdir/striped/subfile"
+		test_33_run "create remote dir and local dir" \
+			"$LFS mkdir -i 1 $DIR/$tdir/remote" \
+			"$LFS mkdir -i 0 $DIR/$tdir/local"
+		(( MDSCOUNT > 2 )) &&
+		test_33_run "create remote dirs on different MDTs" \
+			"$LFS mkdir -i 1 $DIR/$tdir/remote.1" \
+			"$LFS mkdir -i 2 $DIR/$tdir/remote.2"
+	fi
+	test_33_run "create local dir after remote dir creation transaction commit" \
+		"$LFS mkdir -i 1 $DIR/$tdir/remote.3; \
+		 do_facet mds2 $LCTL set_param -n osd*.*MDT0001.force_sync 1;
+		 mkdir $DIR/$tdir/local.3"
 	sync_count=$(do_facet mds1 "lctl get_param -n mdt.*MDT0000.sync_count")
-	echo "sync_count $sync_count"
+	echo "Solc count $sync_count"
 	[ $sync_count -eq 0 ] || error "Sync-Lock-Cancel triggered"
 }
-run_test 33c "Cancel cross-MDT lock should trigger Sync-Lock-Cancel"
+run_test 33c "Cancel cross-MDT lock should trigger Sync-on-Lock-Cancel"
 
-# arg1 is operations done before CoS, arg2 is the operation that triggers CoS
+# arg1 is description, arg2 is operations done before CoS, arg3 is the operation
+# that triggers CoS
 op_trigger_cos() {
 	local commit_nr
 	local total=0
@@ -1046,9 +1488,9 @@ op_trigger_cos() {
 
 	# trigger CoS twice in case transaction commit before unlock
 	for i in 1 2; do
-		sh -c "$1"
+		bash -c "$2"
 		do_nodes $nodes "lctl set_param -n mdt.*.async_commit_count=0"
-		sh -c "$2"
+		bash -c "$3"
 		commit_nr=$(do_nodes $nodes \
 			"lctl get_param -n mdt.*.async_commit_count" | calc_sum)
 		total=$((total + commit_nr));
@@ -1056,76 +1498,101 @@ op_trigger_cos() {
 		sync_all_data
 	done
 
-	echo "CoS count $total"
-	[ $total -gt 0 ] || error "$2 didn't trigger CoS"
+	echo $1
+	echo "  $2"
+	echo "  $3"
+	echo "  CoS count $total"
+	(( total > 0 )) || error "$3 didn't trigger CoS"
 }
 
 test_33d() {
-	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.7.63) ] &&
-		skip "DNE CoS not supported" && return
-
-	# remote directory create
-	op_trigger_cos "mkdir $DIR/$tdir" "$LFS mkdir -i 1 $DIR/$tdir/subdir"
-	# remote directory unlink
-	op_trigger_cos "$LFS mkdir -i 1 $DIR/$tdir" "rmdir $DIR/$tdir"
-	# striped directory create
-	op_trigger_cos "mkdir $DIR/$tdir" "$LFS mkdir -c 2 $DIR/$tdir/subdir"
-	# striped directory setattr
-	op_trigger_cos "$LFS mkdir -c 2 $DIR/$tdir; touch $DIR/$tdir" \
-		"chmod 713 $DIR/$tdir"
-	# striped directory unlink
-	op_trigger_cos "$LFS mkdir -c 2 $DIR/$tdir; touch $DIR/$tdir" \
-		"rmdir $DIR/$tdir"
-	# cross-MDT link
-	op_trigger_cos "$LFS mkdir -c 2 $DIR/$tdir; \
+	(( MDSCOUNT > 1 )) || skip "needs >= 2 MDTs"
+	(( MDS1_VERSION >= $(version_code 2.7.63) )) ||
+		skip "DNE CoS not supported"
+
+	if (( $MDS1_VERSION < $(version_code 2.15.55.133) )); then
+		op_trigger_cos "remote directory unlink" \
+			"$LFS mkdir -i 1 $DIR/$tdir" "rmdir $DIR2/$tdir"
+		op_trigger_cos "striped directory create" "mkdir $DIR/$tdir" \
+			"$LFS mkdir -c 2 $DIR2/$tdir/subdir"
+		op_trigger_cos "striped directory setattr" \
+			"$LFS mkdir -c 2 $DIR/$tdir" "chmod 713 $DIR2/$tdir"
+		op_trigger_cos "striped directory unlink" \
+			"$LFS mkdir -c 2 $DIR/$tdir" "rmdir $DIR2/$tdir"
+		op_trigger_cos "cross-MDT link" \
+			"mkdir $DIR/$tdir; \
 			$LFS mkdir -i 0 $DIR/$tdir/d1; \
 			$LFS mkdir -i 1 $DIR/$tdir/d2; \
 			touch $DIR/$tdir/d1/tgt" \
-		"ln $DIR/$tdir/d1/tgt $DIR/$tdir/d2/src"
-	# cross-MDT rename
-	op_trigger_cos "$LFS mkdir -c 2 $DIR/$tdir; \
-			$LFS mkdir -i 0 $DIR/$tdir/d1; \
-			$LFS mkdir -i 1 $DIR/$tdir/d2; \
-			touch $DIR/$tdir/d1/src" \
-		"mv $DIR/$tdir/d1/src $DIR/$tdir/d2/tgt"
-	# migrate
-	op_trigger_cos "$LFS mkdir -i 0 $DIR/$tdir" \
-		"$LFS migrate -m 1 $DIR/$tdir"
+			"ln $DIR2/$tdir/d1/tgt $DIR2/$tdir/d2/src"
+	fi
+
+	op_trigger_cos "remote directory create" "$LFS mkdir -i 0 $DIR/$tdir" \
+		"$LFS mkdir -i 1 $DIR2/$tdir/subdir"
+	op_trigger_cos "cross-MDT rename" \
+		"mkdir $DIR/$tdir; \
+		$LFS mkdir -i 0 $DIR/$tdir/d1; \
+		$LFS mkdir -i 1 $DIR/$tdir/d2; \
+		touch $DIR/$tdir/d1/src" \
+		"mv $DIR2/$tdir/d1/src $DIR2/$tdir/d2/tgt"
+	op_trigger_cos "migrate" \
+		"$LFS mkdir -i 0 $DIR/$tdir" \
+		"$LFS migrate -m 1 $DIR2/$tdir"
 
 	return 0
 }
-run_test 33d "DNE distributed operation should trigger COS"
+run_test 33d "dependent transactions should trigger COS"
 
 test_33e() {
-	[ -n "$CLIENTS" ] || { skip "Need two or more clients" && return 0; }
-	[ $CLIENTCOUNT -ge 2 ] ||
-		{ skip "Need two or more clients, have $CLIENTCOUNT" &&
-								return 0; }
-	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.7.63) ] &&
-		skip "DNE CoS not supported" && return
+	(( MDSCOUNT > 1 )) || skip "needs >= 2 MDTs"
+	(( MDS1_VERSION >= $(version_code 2.7.63) )) ||
+		skip "DNE CoS not supported"
 
-	local client2=${CLIENT2:-$(hostname)}
-
-	sync
+	$LFS mkdir -i 0 $DIR/$tdir
+	$LFS mkdir -i 0 $DIR/$tdir/d1
+	$LFS mkdir -i 1 $DIR/$tdir/d2
 
 	local nodes=$(comma_list $(mdts_nodes))
 	do_nodes $nodes "lctl set_param -n mdt.*.async_commit_count=0"
 
-	$LFS mkdir -c 2 $DIR/$tdir
-	mkdir $DIR/$tdir/subdir
-	echo abc > $DIR/$tdir/$tfile
-	do_node $client2 echo dfg >> $DIR/$tdir/$tfile
-	do_node $client2 touch $DIR/$tdir/subdir
+	test_33_run "plain dir creation" "mkdir $DIR2/$tdir/plain"
+	test_33_run "open file and write" "echo abc > $DIR2/$tdir/$tfile"
+	test_33_run "append write" "echo dfg >> $DIR2/$tdir/$tfile"
+	test_33_run "setattr" "touch $DIR2/$tdir/$tfile"
+	test_33_run "file unlink" "rm $DIR2/$tdir/$tfile"
+	test_33_run "plain dir unlink" "rmdir $DIR2/$tdir/plain"
+	if (( MDS1_VERSION >= $(version_code 2.15.55.133) )); then
+		test_33_run "striped directory creation" \
+			"$LFS mkdir -i 0 -c 2 $DIR2/$tdir/striped"
+		test_33_run "set default LMV to create striped subdir" \
+			"$LFS setdirstripe -D -c 2 $DIR/$tdir"
+		test_33_run "striped subdir creation" \
+			"createmany -d $DIR/$tdir/subdir 100"
+		test_33_run "sub file creation and write" \
+			"createmany -o $DIR/$tdir/subfile 100; \
+			echo abc > $DIR/$tdir/subfile1"
+		test_33_run "sub file append write" \
+			"echo dfg >> $DIR2/$tdir/subfile2"
+		test_33_run "subdir setatttr" "touch $DIR2/$tdir/subdir1"
+		test_33_run "subdir unlink" \
+			"unlinkmany -d $DIR/$tdir/subdir 100"
+		test_33_run "sub file unlink" \
+			"unlinkmany $DIR2/$tdir/subfile 100"
+		test_33_run "sub file creation follows striped dir chmod" \
+			"chmod 777 $DIR/$tdir/striped; \
+			 touch $DIR/$tdir/striped/subfile"
+		test_33_run "striped directory unlink" \
+			"rm -rf $DIR2/$tdir/striped"
+	fi
+
+	test_33_run "directory unlink" "rm -rf $DIR2/$tdir"
 
 	local async_commit_count=$(do_nodes $nodes \
 		"lctl get_param -n mdt.*.async_commit_count" | calc_sum)
-	[ $async_commit_count -gt 0 ] && error "CoS triggerred"
-
-	return 0
+	echo "CoS count $async_commit_count"
+	(( async_commit_count == 0 )) || error "CoS triggerred"
 }
-run_test 33e "DNE local operation shouldn't trigger COS"
+run_test 33e "independent transactions shouldn't trigger COS"
 
 # End commit on sharing tests
 
@@ -1250,7 +1717,7 @@ test_35() { # bug 17645
 	for g in $gen; do
 	    if ! test "$g" -eq "${generation[count]}"; then
 		list=$(lctl list_param mdc.$FSNAME-MDT*-mdc-*.import)
-		local c = 0
+		local c=0
 		for imp in $list; do
 			if [ $c = $count ]; then
 				break
@@ -1355,7 +1822,7 @@ test_39a() {
 		if [ $i = 0 ] ; then echo "repeat after cancel_lru_locks"; fi
 	done
 }
-run_test 39a "test from 11063 =================================="
+run_test 39a "file mtime does not change after rename"
 
 test_39b() {
 	local client1=${CLIENT1:-`hostname`}
@@ -1382,7 +1849,7 @@ test_39b() {
 		if [ $i = 0 ] ; then echo "repeat after cancel_lru_locks"; fi
 	done
 }
-run_test 39b "11063 problem 1 =================================="
+run_test 39b "file mtime the same on clients with/out lock"
 
 test_39c() {
 	local client1=${CLIENT1:-`hostname`}
@@ -1439,13 +1906,32 @@ test_39d() { # LU-7310
 }
 run_test 39d "sync write should update mtime"
 
+pdo_sched() {
+	# how long 40-47 take with specific delay
+	# sleep 0.1 # 78s
+	# sleep 0.2 # 103s
+	# sleep 0.3 # 124s
+	sleep 0.5 # 164s
+}
+
+# for pdo testing, we must cancel MDT-MDT locks as well as client locks to
+# avoid unexpected delays due to previous tests
+pdo_lru_clear() {
+	cancel_lru_locks mdc
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param -n ldlm.namespaces.*mdt*.lru_size=clear
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL get_param ldlm.namespaces.*mdt*.lock_unused_count \
+			ldlm.namespaces.*mdt*.lock_count | grep -v '=0'
+}
+
 # check that pid exists hence second operation wasn't blocked by first one
 # if it is so then there is no conflict, return 0
 # else second operation is conflicting with first one, return 1
 check_pdo_conflict() {
 	local pid=$1
 	local conflict=0
-	sleep 1 # to ensure OP1 is finished on client if OP2 is blocked by OP1
+	pdo_sched # to ensure OP1 is finished on client if OP2 is blocked by OP1
 	if [[ `ps --pid $pid | wc -l` == 1 ]]; then
 		conflict=1
 		echo "Conflict"
@@ -1459,120 +1945,139 @@ check_pdo_conflict() {
 # test 40: check non-blocking operations
 test_40a() {
 	remote_mds_nodsh && skip "remote MDS with nodsh" && return
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
-	touch $DIR2
-	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	touch $DIR2/$tfile-2
+
+	mkdir_on_mdt0 $DIR2/$tdir
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
+	mkdir $DIR1/$tdir/$tfile &
+	PID1=$!; pdo_sched
+	touch $DIR2/$tdir/$tfile-2
 	check_pdo_conflict $PID1 || error "create is blocked"
-	mkdir $DIR2/$tfile-3
+	mkdir $DIR2/$tdir/$tfile-3
 	check_pdo_conflict $PID1 || error "mkdir is blocked"
-	link $DIR2/$tfile-2 $DIR2/$tfile-4
+	link $DIR2/$tdir/$tfile-2 $DIR2/$tdir/$tfile-4
 	check_pdo_conflict $PID1 || error "link is blocked"
-	mv $DIR2/$tfile-2 $DIR2/$tfile-5
+	mv $DIR2/$tdir/$tfile-2 $DIR2/$tdir/$tfile-5
 	check_pdo_conflict $PID1 || error "rename is blocked"
-	stat $DIR2/$tfile-3 $DIR2/$tfile-4 > /dev/null
+	stat $DIR2/$tdir/$tfile-3 $DIR2/$tdir/$tfile-4 > /dev/null
 	check_pdo_conflict $PID1 || error "getattr is blocked"
-	rm $DIR2/$tfile-4 $DIR2/$tfile-5
-	rmdir $DIR2/$tfile-3
+	rm $DIR2/$tdir/$tfile-4 $DIR2/$tdir/$tfile-5
+	rmdir $DIR2/$tdir/$tfile-3
 	check_pdo_conflict $PID1 || error "unlink is blocked"
 
 	#  all operations above shouldn't wait the first one
 	check_pdo_conflict $PID1 || error "parallel operation is blocked"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	wait $PID1
-	rm -rf $DIR/$tfile*
+	rm -rf $DIR/$tdir
 	return 0
 }
 run_test 40a "pdirops: create vs others =============="
 
 test_40b() {
 	remote_mds_nodsh && skip "remote MDS with nodsh" && return
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
-	touch $DIR1/$tfile &
-	PID1=$!
-	sleep 1
+
+	mkdir_on_mdt0 $DIR2/$tdir
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
+	touch $DIR1/$tdir/$tfile &
+	PID1=$!; pdo_sched
 	# open|create
-	touch $DIR2/$tfile-2
+	touch $DIR2/$tdir/$tfile-2
 	check_pdo_conflict $PID1 || error "create is blocked"
-	mkdir $DIR2/$tfile-3
+	mkdir $DIR2/$tdir/$tfile-3
 	check_pdo_conflict $PID1 || error "mkdir is blocked"
-	link $DIR2/$tfile-2 $DIR2/$tfile-4
+	link $DIR2/$tdir/$tfile-2 $DIR2/$tdir/$tfile-4
 	check_pdo_conflict $PID1 || error "link is blocked"
-	mv $DIR2/$tfile-2 $DIR2/$tfile-5
+	mv $DIR2/$tdir/$tfile-2 $DIR2/$tdir/$tfile-5
 	check_pdo_conflict $PID1 || error "rename is blocked"
-	stat $DIR2/$tfile-3 $DIR2/$tfile-4 > /dev/null
+	stat $DIR2/$tdir/$tfile-3 $DIR2/$tdir/$tfile-4 > /dev/null
 	check_pdo_conflict $PID1 || error "getattr is blocked"
-	rm $DIR2/$tfile-4 $DIR2/$tfile-5
-	rmdir $DIR2/$tfile-3
+	rm $DIR2/$tdir/$tfile-4 $DIR2/$tdir/$tfile-5
+	rmdir $DIR2/$tdir/$tfile-3
 	check_pdo_conflict $PID1 || error "unlink is blocked"
 	# all operations above shouldn't wait the first one
 
         check_pdo_conflict $PID1 || error "parallel operation is blocked"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	wait $PID1
-	rm -rf $DIR/$tfile*
+	rm -rf $DIR/$tdir
 	return 0
 }
 run_test 40b "pdirops: open|create and others =============="
 
 test_40c() {
 	remote_mds_nodsh && skip "remote MDS with nodsh" && return
-	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
-	link $DIR1/$tfile $DIR1/$tfile-0 &
-	PID1=$!
-	sleep 1
+
+	mkdir_on_mdt0 $DIR2/$tdir
+	pdo_lru_clear
+	touch $DIR1/$tdir/$tfile
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
+	link $DIR1/$tdir/$tfile $DIR1/$tdir/$tfile-0 &
+	PID1=$!; pdo_sched
 	# open|create
-	touch $DIR2/$tfile-2
+	touch $DIR2/$tdir/$tfile-2
 	check_pdo_conflict $PID1 || error "create is blocked"
-	mkdir $DIR2/$tfile-3
+	mkdir $DIR2/$tdir/$tfile-3
 	check_pdo_conflict $PID1 || error "mkdir is blocked"
-	link $DIR2/$tfile-2 $DIR2/$tfile-4
+	link $DIR2/$tdir/$tfile-2 $DIR2/$tdir/$tfile-4
 	check_pdo_conflict $PID1 || error "link is blocked"
-	mv $DIR2/$tfile-2 $DIR2/$tfile-5
+	mv $DIR2/$tdir/$tfile-2 $DIR2/$tdir/$tfile-5
 	check_pdo_conflict $PID1 || error "rename is blocked"
-	stat $DIR2/$tfile-3 $DIR2/$tfile-4 > /dev/null
+	stat $DIR2/$tdir/$tfile-3 $DIR2/$tdir/$tfile-4 > /dev/null
 	check_pdo_conflict $PID1 || error "getattr is blocked"
-	rm $DIR2/$tfile-4 $DIR2/$tfile-5
-	rmdir $DIR2/$tfile-3
+	rm $DIR2/$tdir/$tfile-4 $DIR2/$tdir/$tfile-5
+	rmdir $DIR2/$tdir/$tfile-3
 	check_pdo_conflict $PID1 || error "unlink is blocked"
 
         # all operations above shouldn't wait the first one
 	check_pdo_conflict $PID1 || error "parallel operation is blocked"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	wait $PID1
-	rm -rf $DIR/$tfile*
+	rm -rf $DIR/$tdir
 	return 0
 }
 run_test 40c "pdirops: link and others =============="
 
 test_40d() {
 	remote_mds_nodsh && skip "remote MDS with nodsh" && return
-	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
-	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
+
+	mkdir_on_mdt0 $DIR2/$tdir
+	pdo_lru_clear
+	touch $DIR1/$tdir/$tfile
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
+	rm $DIR1/$tdir/$tfile &
+	PID1=$!; pdo_sched
 	# open|create
-	touch $DIR2/$tfile-2
+	touch $DIR2/$tdir/$tfile-2
 	check_pdo_conflict $PID1 || error "create is blocked"
-	mkdir $DIR2/$tfile-3
+	mkdir $DIR2/$tdir/$tfile-3
 	check_pdo_conflict $PID1 || error "mkdir is blocked"
-	link $DIR2/$tfile-2 $DIR2/$tfile-4
+	link $DIR2/$tdir/$tfile-2 $DIR2/$tdir/$tfile-4
 	check_pdo_conflict $PID1 || error "link is blocked"
-	mv $DIR2/$tfile-2 $DIR2/$tfile-5
+	mv $DIR2/$tdir/$tfile-2 $DIR2/$tdir/$tfile-5
 	check_pdo_conflict $PID1 || error "rename is blocked"
-	stat $DIR2/$tfile-3 $DIR2/$tfile-4 > /dev/null
+	stat $DIR2/$tdir/$tfile-3 $DIR2/$tdir/$tfile-4 > /dev/null
 	check_pdo_conflict $PID1 || error "getattr is blocked"
-	rm $DIR2/$tfile-4 $DIR2/$tfile-5
-	rmdir $DIR2/$tfile-3
+	rm $DIR2/$tdir/$tfile-4 $DIR2/$tdir/$tfile-5
+	rmdir $DIR2/$tdir/$tfile-3
 	check_pdo_conflict $PID1 || error "unlink is blocked"
 
 	# all operations above shouldn't wait the first one
 	check_pdo_conflict $PID1 || error "parallel operation is blocked"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	wait $PID1
 	return 0
 }
@@ -1580,357 +2085,523 @@ run_test 40d "pdirops: unlink and others =============="
 
 test_40e() {
 	remote_mds_nodsh && skip "remote MDS with nodsh" && return
-	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
-	mv $DIR1/$tfile $DIR1/$tfile-0 &
-	PID1=$!
-	sleep 1
+
+	mkdir_on_mdt0 $DIR2/$tdir
+	pdo_lru_clear
+	touch $DIR1/$tdir/$tfile
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
+	mv $DIR1/$tdir/$tfile $DIR1/$tdir/$tfile-0 &
+	PID1=$!; pdo_sched
 	# open|create
-	touch $DIR2/$tfile-2
+	touch $DIR2/$tdir/$tfile-2
 	check_pdo_conflict $PID1 || error "create is blocked"
-	mkdir $DIR2/$tfile-3
+	mkdir $DIR2/$tdir/$tfile-3
 	check_pdo_conflict $PID1 || error "mkdir is blocked"
-	link $DIR2/$tfile-2 $DIR2/$tfile-4
+	link $DIR2/$tdir/$tfile-2 $DIR2/$tdir/$tfile-4
 	check_pdo_conflict $PID1 || error "link is blocked"
-	stat $DIR2/$tfile-3 $DIR2/$tfile-4 > /dev/null
+	stat $DIR2/$tdir/$tfile-3 $DIR2/$tdir/$tfile-4 > /dev/null
 	check_pdo_conflict $PID1 || error "getattr is blocked"
-	rm $DIR2/$tfile-4 $DIR2/$tfile-2
-	rmdir $DIR2/$tfile-3
+	rm $DIR2/$tdir/$tfile-4 $DIR2/$tdir/$tfile-2
+	rmdir $DIR2/$tdir/$tfile-3
 	check_pdo_conflict $PID1 || error "unlink is blocked"
 
        # all operations above shouldn't wait the first one
 	check_pdo_conflict $PID1 || error "parallel operation is blocked"
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	wait $PID1
-	rm -rf $DIR/$tfile*
+	rm -rf $DIR/$tdir
 	return 0
 }
 run_test 40e "pdirops: rename and others =============="
 
 # test 41: create blocking operations
 test_41a() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile && error "mkdir must fail"
+	PID1=$! ; pdo_sched
+	mkdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; echo "mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "mkdir must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41a "pdirops: create vs mkdir =============="
 
 test_41b() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c && error "create must fail"
+	PID1=$! ; pdo_sched
+	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "create isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "create must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41b "pdirops: create vs create =============="
 
 test_41c() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile-2 $DIR2/$tfile && error "link must fail"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "link must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41c "pdirops: create vs link =============="
 
 test_41d() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	rm $DIR2/$tfile || error "unlink must succeed"
+	PID1=$! ; pdo_sched
+	rm $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "unlink must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41d "pdirops: create vs unlink =============="
 
 test_41e() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile-2 $DIR2/$tfile || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41e "pdirops: create and rename (tgt) =============="
 
 test_41f() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-2 || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-2 &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41f "pdirops: create and rename (src) =============="
 
 test_41g() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null || error "stat must succeed"
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "getattr isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "stat must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41g "pdirops: create vs getattr =============="
 
 test_41h() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	ls -lia $DIR2/ > /dev/null
+	PID1=$! ; pdo_sched
+	ls -lia $DIR2/ > /dev/null &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "readdir isn't blocked"; }
+	wait $PID2
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41h "pdirops: create vs readdir =============="
 
+sub_test_41i() {
+	local PID1 PID2
+	local fail_loc="$1"
+	local ret=0
+
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=${fail_loc} || true" &>/dev/null
+
+	$MULTIOP $DIR1/$tfile oO_CREAT:O_EXCL:c 2>/dev/null &
+	PID1=$!
+	sleep 0.2
+	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c 2>/dev/null &
+	PID2=$!
+
+	if ! wait $PID1 && ! wait $PID2; then
+		echo "Both creates failed (1 should fail, 1 should succeed)"
+		ret=1
+	elif wait $PID1 && wait $PID2; then
+		echo "Both creates succeeded (1 should fail, 1 should succeed)"
+		ret=2
+	fi
+
+	#Clean
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x0 || true" &>/dev/null
+	rm -f $DIR/$tfile
+
+	return $ret
+}
+
+test_41i() {
+	(( $MDS1_VERSION >= $(version_code 2.13.56) )) ||
+		skip "Need MDS version newer than 2.13.56"
+	local msg fail_loc
+
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_REINT_OPEN         0x169
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_REINT_OPEN2        0x16a
+	for fail_loc in "0x80000169" "0x8000016a"; do
+		echo "Begin 100 tests with fail_loc=$fail_loc"
+		printf "Progress: "
+		for i in {1..100}; do
+			printf "*"
+			msg=$(sub_test_41i "$fail_loc") ||
+				{ echo; error "iter=$i : $msg"; }
+		done
+		echo
+	done
+}
+run_test 41i "reint_open: create vs create"
+
+
 # test 42: unlink and blocking operations
 test_42a() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile && error "mkdir must fail"
+	PID1=$! ; pdo_sched
+	mkdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "mkdir must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42a "pdirops: mkdir vs mkdir =============="
 
 test_42b() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c && error "create must fail"
+	PID1=$! ; pdo_sched
+	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "create isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "create must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42b "pdirops: mkdir vs create =============="
 
 test_42c() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile-2 $DIR2/$tfile && error "link must fail"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "link must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42c "pdirops: mkdir vs link =============="
 
 test_42d() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	rmdir $DIR2/$tfile || error "unlink must succeed"
+	PID1=$! ; pdo_sched
+	rmdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "unlink must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42d "pdirops: mkdir vs unlink =============="
 
 test_42e() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv -T $DIR2/$tfile-2 $DIR2/$tfile && error "rename must fail"
+	PID1=$! ; pdo_sched
+	mv -T $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "rename must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42e "pdirops: mkdir and rename (tgt) =============="
 
 test_42f() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-2 || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-2 &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42f "pdirops: mkdir and rename (src) =============="
 
 test_42g() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
-	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null || error "stat must succeed"
+	mkdir_on_mdt0 $DIR1/$tdir
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
+	mkdir $DIR1/$tdir/$tfile &
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tdir/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "getattr isn't blocked"; }
-	rm -rf $DIR/$tfile*
-	return 0
+	wait $PID2 ; [ $? -eq 0 ] || error "stat must succeed"
+	rm -rf $DIR/$tdir
 }
 run_test 42g "pdirops: mkdir vs getattr =============="
 
 test_42h() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	ls -lia $DIR2/ > /dev/null
+	PID1=$! ; pdo_sched
+	ls -lia $DIR2/ > /dev/null &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "readdir isn't blocked"; }
+	wait $PID2
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42h "pdirops: mkdir vs readdir =============="
 
-# test 43: unlink and blocking operations
+# test 43: rmdir,mkdir won't return -EEXIST
 test_43a() {
-	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
-	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile || error "mkdir must succeed"
-	check_pdo_conflict $PID1 && { wait $PID1; error "mkdir isn't blocked"; }
-	rm -rf $DIR/$tfile*
+	for i in {1..1000}; do
+		mkdir $DIR1/$tdir || error "mkdir $tdir failed"
+		rmdir $DIR2/$tdir || error "rmdir $tdir failed"
+	done
 	return 0
 }
-run_test 43a "pdirops: unlink vs mkdir =============="
+run_test 43a "rmdir,mkdir doesn't return -EEXIST =============="
 
 test_43b() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c || error "create must succeed"
+	PID1=$! ; pdo_sched
+	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "create isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "create must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43b "pdirops: unlink vs create =============="
 
 test_43c() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile-2 $DIR2/$tfile || error "link must succeed"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "link must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43c "pdirops: unlink vs link =============="
 
 test_43d() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	rm $DIR2/$tfile && error "unlink must fail"
+	PID1=$! ; pdo_sched
+	rm $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "unlink must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43d "pdirops: unlink vs unlink =============="
 
 test_43e() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv -u $DIR2/$tfile-2 $DIR2/$tfile || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv -u $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43e "pdirops: unlink and rename (tgt) =============="
 
 test_43f() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-2 && error "rename must fail"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-2 &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "rename must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43f "pdirops: unlink and rename (src) =============="
 
 test_43g() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null && error "stat must fail"
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "getattr isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "stat must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43g "pdirops: unlink vs getattr =============="
 
 test_43h() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	ls -lia $DIR2/ > /dev/null
+	PID1=$! ; pdo_sched
+	ls -lia $DIR2/ > /dev/null &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "readdir isn't blocked"; }
+	wait $PID2
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -1938,132 +2609,258 @@ run_test 43h "pdirops: unlink vs readdir =============="
 
 test_43i() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$LFS mkdir -i 1 $DIR2/$tfile || error "remote mkdir must succeed"
+	PID1=$! ; pdo_sched
+	$LFS mkdir -i 1 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 &&
 		{ wait $PID1; error "remote mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "remote mkdir must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43i "pdirops: unlink vs remote mkdir"
 
+test_43j() {
+	[[ $MDS1_VERSION -lt $(version_code 2.13.52) ]] &&
+		skip "Need MDS version newer than 2.13.52"
+
+	mkdir_on_mdt0 $DIR1/$tdir
+	for i in {1..100}; do
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_CREATE_RACE         0x167
+		do_nodes $(comma_list $(mdts_nodes)) \
+			"lctl set_param -n fail_loc=0x80000167 2>/dev/null ||
+				true"
+		OK=0
+		mkdir $DIR1/$tdir/sub &
+		PID1=$!
+		mkdir $DIR2/$tdir/sub && ((OK++))
+		wait $PID1 && ((OK++))
+		(( OK == 1 )) || error "exactly one mkdir should succeed"
+
+		rmdir $DIR1/$tdir/sub || error "rmdir failed"
+	done
+	return 0
+}
+run_test 43j "racy mkdir return EEXIST =============="
+
+sub_test_43k() {
+	local PID1 PID2
+	local fail_loc="$1"
+	local ret=0
+
+	# We test in a separate directory to be able to unblock server thread in
+	# cfs_race() if LCK_PW is taken on the parent by mdt_reint_unlink.
+	test_mkdir $DIR2/$tdir
+	touch $DIR2/$tdir/$tfile
+	pdo_lru_clear
+
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=${fail_loc} || true" &>/dev/null
+	echo content > $DIR1/$tdir/$tfile & PID1=$!
+	pdo_sched
+	multiop $DIR2/$tdir/$tfile u & PID2=$!
+
+	wait $PID1 ||
+		{ ret=$?; \
+		echo -n "overwriting $tfile should succeed (err=$ret); "; }
+	wait $PID2 ||
+		{ ret=$?; \
+		echo -n "unlinking $tfile should succeed (err=$ret);"; }
+
+	#Clean
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x0 || true" &>/dev/null
+	rm -rf $DIR/$tdir
+
+	return $ret
+}
+
+test_43k() {
+	(( $MDS1_VERSION >= $(version_code 2.13.56) )) ||
+		skip "Need MDS version newer than 2.13.56"
+	local msg fail_loc
+
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_REINT_OPEN         0x169
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_REINT_OPEN2        0x16a
+	for fail_loc in "0x80000169" "0x8000016a"; do
+		echo "Begin 100 tests with fail_loc=$fail_loc"
+		printf "Progress: "
+		for i in {1..100}; do
+			printf "*"
+			msg=$(sub_test_43k "$fail_loc") ||
+				{ echo; error "iter=$i : $msg"; }
+		done
+		echo
+	done
+
+	#Clean
+	reset_fail_loc
+
+	return 0
+}
+run_test 43k "unlink vs create"
+
 # test 44: rename tgt and blocking operations
 test_44a() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2   0x146
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2   0x146
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000146 2>/dev/null || true"
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile && error "mkdir must fail"
-	check_pdo_conflict $PID1 && { wait $PID1; error "mkdir isn't blocked"; }
+	PID1=$! ; pdo_sched
+	mkdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
+	check_pdo_conflict $PID1 && { wait $PID1; date;error "mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "mkdir must fail"
+	date
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44a "pdirops: rename tgt vs mkdir =============="
 
 test_44b() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000146 2>/dev/null || true"
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c && error "create must fail"
+	PID1=$! ; pdo_sched
+	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "create isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "create must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44b "pdirops: rename tgt vs create =============="
 
 test_44c() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 	touch $DIR1/$tfile-3
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000146 2>/dev/null || true"
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile-3 $DIR2/$tfile && error "link must fail"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile-3 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "link must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44c "pdirops: rename tgt vs link =============="
 
 test_44d() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000146 2>/dev/null || true"
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	rm $DIR2/$tfile || error "unlink must succeed"
+	PID1=$! ; pdo_sched
+	rm $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "unlink must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44d "pdirops: rename tgt vs unlink =============="
 
 test_44e() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 	touch $DIR1/$tfile-2
 	touch $DIR1/$tfile-3
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000146 2>/dev/null || true"
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile-3 $DIR2/$tfile || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile-3 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44e "pdirops: rename tgt and rename (tgt) =============="
 
 test_44f() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 	touch $DIR1/$tfile-3
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000146 2>/dev/null || true"
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-3 || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-3 &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44f "pdirops: rename tgt and rename (src) =============="
 
 test_44g() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000146 2>/dev/null || true"
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null || error "stat must succeed"
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "getattr isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "stat must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44g "pdirops: rename tgt vs getattr =============="
 
 test_44h() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000146 2>/dev/null || true"
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	ls -lia $DIR2/ > /dev/null
+	PID1=$! ; pdo_sched
+	ls -lia $DIR2/ > /dev/null &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "readdir isn't blocked"; }
+	wait $PID2
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2072,130 +2869,166 @@ run_test 44h "pdirops: rename tgt vs readdir =============="
 # test 44: rename tgt and blocking operations
 test_44i() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2   0x146
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2   0x146
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000146 2>/dev/null || true"
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$LFS mkdir -i 1 $DIR2/$tfile && error "remote mkdir must fail"
+	PID1=$! ; pdo_sched
+	$LFS mkdir -i 1 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1;
 				error "remote mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "remote mkdir must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44i "pdirops: rename tgt vs remote mkdir"
 
-# test 45: rename src and blocking operations
+# test 45: rename,mkdir doesn't fail with -EEXIST
 test_45a() {
-	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
-	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile || error "mkdir must succeed"
-	check_pdo_conflict $PID1 && { wait $PID1; error "mkdir isn't blocked"; }
-	rm -rf $DIR/$tfile*
+	for i in {1..1000}; do
+		mkdir $DIR1/$tdir || error "mkdir $tdir failed"
+		mrename $DIR2/$tdir $DIR2/$tdir.$i > /dev/null ||
+			error "mrename to $tdir.$i failed"
+	done
+	rm -rf $DIR/$tdir*
 	return 0
 }
-run_test 45a "pdirops: rename src vs mkdir =============="
+run_test 45a "rename,mkdir doesn't return -EEXIST =============="
 
 test_45b() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c || error "create must succeed"
+	PID1=$! ; pdo_sched
+	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "create isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "create must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45b "pdirops: rename src vs create =============="
 
 test_45c() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 	touch $DIR1/$tfile-3
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile-3 $DIR2/$tfile || error "link must succeed"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile-3 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "link must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45c "pdirops: rename src vs link =============="
 
 test_45d() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	rm $DIR2/$tfile && error "unlink must fail"
+	PID1=$! ; pdo_sched
+	rm $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "unlink must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45d "pdirops: rename src vs unlink =============="
 
 test_45e() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 	touch $DIR1/$tfile-3
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile-3 $DIR2/$tfile || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile-3 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45e "pdirops: rename src and rename (tgt) =============="
 
 test_45f() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-3 && error "rename must fail"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-3 &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "rename must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45f "pdirops: rename src and rename (src) =============="
 
 test_45g() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null && error "stat must fail"
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "getattr isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "stat must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45g "pdirops: rename src vs getattr =============="
 
 test_45h() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	ls -lia $DIR2/ > /dev/null
+	PID1=$! ; pdo_sched
+	ls -lia $DIR2/ > /dev/null &
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "readdir isn't blocked"; }
+	wait $PID2
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2203,131 +3036,230 @@ run_test 45h "pdirops: unlink vs readdir =============="
 
 test_45i() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	$LFS mkdir -i 1 $DIR2/$tfile || error "create remote dir must succeed"
+	PID1=$! ; pdo_sched
+	$LFS mkdir -i 1 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1;
 				error "create remote dir isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "create remote dir must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45i "pdirops: rename src vs remote mkdir"
 
+sub_test_45j() {
+	local PID1 PID2
+	local fail_loc="$1"
+	local ret=0
+
+	# We test in a sparate directory to be able to unblock server thread in
+	# cfs_race if LCK_PW is taken on the parent by mdt_reint_rename.
+	test_mkdir $DIR2/$tdir
+	echo file1 > $DIR2/$tdir/$tfile
+	echo file2 > $DIR2/$tdir/$tfile-2
+	pdo_lru_clear
+
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=${fail_loc} || true" &>/dev/null
+
+	cat $DIR1/$tdir/$tfile >/dev/null &
+	PID1=$!
+	pdo_sched
+	mrename $DIR2/$tdir/$tfile-2 $DIR2/$tdir/$tfile > /dev/null &
+	PID2=$!
+
+	wait $PID1 ||
+		{ ret=$?; echo -n "cat $tfile should succeed (err=$ret); "; }
+	wait $PID2 ||
+		{ ret=$?; \
+		echo -n "mrename $tfile-2 to $tfile failed (err=$ret);"; }
+
+	#Clean
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x0 || true" &>/dev/null
+	rm -rf $DIR/$tdir
+
+	return $ret
+}
+
+test_45j() {
+	(( $MDS1_VERSION >= $(version_code 2.13.56) )) ||
+		skip "Need MDS version newer than 2.13.56"
+	local msg fail_loc
+
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_REINT_OPEN         0x169
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_REINT_OPEN2        0x16a
+	for fail_loc in "0x80000169" "0x8000016a"; do
+		echo "Begin 100 tests with fail_loc=$fail_loc"
+		printf "Progress: "
+		for i in {1..100}; do
+			printf "*"
+			msg=$(sub_test_45j "$fail_loc") ||
+				{ echo; error "iter=$i : $msg"; }
+		done
+		echo
+	done
+}
+run_test 45j "read vs rename =============="
+
 # test 46: link and blocking operations
 test_46a() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile && error "mkdir must fail"
+	PID1=$! ; pdo_sched
+	mkdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "mkdir must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46a "pdirops: link vs mkdir =============="
 
 test_46b() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c && error "create must fail"
+	PID1=$! ; pdo_sched
+	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "create isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "create must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46b "pdirops: link vs create =============="
 
 test_46c() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile $DIR2/$tfile && error "link must fail"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "link must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46c "pdirops: link vs link =============="
 
 test_46d() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	rm $DIR2/$tfile || error "unlink must succeed"
+	PID1=$! ; pdo_sched
+	rm $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "unlink must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46d "pdirops: link vs unlink =============="
 
 test_46e() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 	touch $DIR1/$tfile-3
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile-3 $DIR2/$tfile || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile-3 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46e "pdirops: link and rename (tgt) =============="
 
 test_46f() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 	touch $DIR1/$tfile-3
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-3 || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-3 &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46f "pdirops: link and rename (src) =============="
 
 test_46g() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null || error "stat must succeed"
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "getattr isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "stat must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46g "pdirops: link vs getattr =============="
 
 test_46h() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	ls -lia $DIR2/ > /dev/null
-	check_pdo_conflict $PID1 && { wait $PID1;
-			error "readdir isn't blocked"; }
+	PID1=$! ; pdo_sched
+	ls -lia $DIR2/ > /dev/null &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
+	check_pdo_conflict $PID1 && { wait $PID1; error "readdir isn't blocked"; }
+	wait $PID2
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2335,15 +3267,20 @@ run_test 46h "pdirops: link vs readdir =============="
 
 test_46i() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$LFS mkdir -i 1 $DIR2/$tfile && error "remote mkdir must fail"
+	PID1=$! ; pdo_sched
+	$LFS mkdir -i 1 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1;
 				error "remote mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "remote mkdir must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2351,29 +3288,40 @@ run_test 46i "pdirops: link vs remote mkdir"
 
 # test 47: remote mkdir and blocking operations
 test_47a() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile && error "mkdir must fail"
+	PID1=$! ; pdo_sched
+	mkdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "mkdir must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 47a "pdirops: remote mkdir vs mkdir"
 
 test_47b() {
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	multiop $DIR2/$tfile oO_CREAT:O_EXCL:c && error "create must fail"
+	PID1=$! ; pdo_sched
+	sleep 1 # please do not remove this sleep, see LU-10754
+	multiop $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1;
 					error "create isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "create must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2381,14 +3329,19 @@ run_test 47b "pdirops: remote mkdir vs create"
 
 test_47c() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile-2 $DIR2/$tfile && error "link must fail"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "link must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2396,14 +3349,19 @@ run_test 47c "pdirops: remote mkdir vs link"
 
 test_47d() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	rmdir $DIR2/$tfile || error "unlink must succeed"
+	PID1=$! ; pdo_sched
+	rmdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1;
 					error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rmdir must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2411,15 +3369,20 @@ run_test 47d "pdirops: remote mkdir vs unlink"
 
 test_47e() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv -T $DIR2/$tfile-2 $DIR2/$tfile && error "rename must fail"
+	PID1=$! ; pdo_sched
+	mv -T $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1;
 					error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "rename must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2427,14 +3390,19 @@ run_test 47e "pdirops: remote mkdir and rename (tgt)"
 
 test_47f() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-2 || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-2 &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1;
 					error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2442,14 +3410,21 @@ run_test 47f "pdirops: remote mkdir and rename (src)"
 
 test_47g() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
-#define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
-	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
+	sync
+	sync_all_data
+	pdo_lru_clear
+#define CFS_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0x80000145 2>/dev/null || true"
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null || error "stat must succeed"
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_nodes $(comma_list $(mdts_nodes)) \
+		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	check_pdo_conflict $PID1 && { wait $PID1;
 					error "getattr isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "stat must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2502,29 +3477,32 @@ test_51a() {
 run_test 51a "layout lock: refresh layout should work"
 
 test_51b() {
-	[[ $(lustre_version_code $SINGLEMDS) -ge $(version_code 2.3.59) ]] ||
-		{ skip "Need MDS version at least 2.3.59"; return 0; }
+	(( $MDS1_VERSION >= $(version_code 2.3.59) )) ||
+		skip "Need MDS version at least 2.3.59"
 
 	local tmpfile=`mktemp`
 
-	# create an empty file
-	$MCREATE $DIR1/$tfile || error "mcreate $DIR1/$tfile failed"
+	$LFS setstripe -E 1m -S 1M -c 1 -E -1 -c 1 $DIR1/$tfile ||
+		error "Create $DIR1/$tfile failed"
+
+	dd if=/dev/zero of=$DIR1/$tfile bs=1k count=1 conv=notrunc ||
+		error "dd $DIR1/$tfile failed"
 
 	# delay glimpse so that layout has changed when glimpse finish
 #define OBD_FAIL_GLIMPSE_DELAY 0x1404
-	$LCTL set_param fail_loc=0x1404
+	$LCTL set_param fail_loc=0x1404 fail_val=4
 	stat -c %s $DIR2/$tfile |tee $tmpfile &
 	local pid=$!
-	sleep 1
+	sleep 0.2
 
-	# create layout of testing file
-	dd if=/dev/zero of=$DIR1/$tfile bs=1k count=1 conv=notrunc >/dev/null ||
+	# extend layout of testing file
+	dd if=/dev/zero of=$DIR1/$tfile bs=1M count=1 seek=2 conv=notrunc ||
 		error "dd $DIR1/$tfile failed"
 
 	wait $pid
 	local fsize=$(cat $tmpfile)
 
-	[ x$fsize = x1024 ] || error "file size is $fsize, should be 1024"
+	[ x$fsize = x3145728 ] || error "file size is $fsize, should be 3145728"
 
 	rm -f $DIR1/$tfile $tmpfile
 }
@@ -2591,6 +3569,30 @@ test_51d() {
 }
 run_test 51d "layout lock: losing layout lock should clean up memory map region"
 
+test_51e() {
+	(( $MDS1_VERSION >= $(version_code 2.13.54.148) )) ||
+		skip "MDS version must be at least 2.13.54.148"
+
+	local pid
+
+	$MULTIOP $DIR/$tfile oO_CREAT:O_RDWR:eW_E+eUc &
+	pid=$!
+	sleep 1
+
+	$LFS getstripe $DIR2/$tfile
+	kill -USR1 $pid
+	wait $pid || error "multiop failed"
+
+	$MULTIOP $DIR/$tfile oO_RDONLY:eR_E+eUc &
+	pid=$!
+	sleep 1
+
+	$LFS getstripe $DIR2/$tfile
+	kill -USR1 $pid
+	wait $pid || error "multiop failed"
+}
+run_test 51e "lfs getstripe does not break leases, part 2"
+
 test_54_part1()
 {
 	echo "==> rename vs getattr vs setxattr should not deadlock"
@@ -2660,56 +3662,59 @@ test_54() {
 run_test 54 "rename locking"
 
 test_55a() {
-	mkdir -p $DIR/d1/d2 $DIR/d3 || error "(1) mkdir failed"
+	mkdir_on_mdt0 $DIR/$tdir
+	mkdir -p $DIR/$tdir/d1/d2 $DIR/$tdir/d3 || error "(1) mkdir failed"
 
 #define OBD_FAIL_MDS_RENAME4              0x156
 	do_facet mds1 $LCTL set_param fail_loc=0x80000156
 
-	mv -T $DIR/d1/d2 $DIR/d3/d2 &
+	mv -T $DIR/$tdir/d1/d2 $DIR/$tdir/d3/d2 &
 	PID1=$!
 	sleep 1
 
-	rm -r $DIR2/d3
+	rm -r $DIR2/$tdir/d3
 	wait $PID1 && error "(2) mv succeeded"
 
-	rm -rf $DIR/d1
+	rm -rf $DIR/$tdir
 }
 run_test 55a "rename vs unlink target dir"
 
 test_55b()
 {
-	mkdir -p $DIR/d1/d2 $DIR/d3 || error "(1) mkdir failed"
+	mkdir_on_mdt0 $DIR/$tdir
+	mkdir -p $DIR/$tdir/d1/d2 $DIR/$tdir/d3 || error "(1) mkdir failed"
 
 #define OBD_FAIL_MDS_RENAME4             0x156
 	do_facet mds1 $LCTL set_param fail_loc=0x80000156
 
-	mv -T $DIR/d1/d2 $DIR/d3/d2 &
+	mv -T $DIR/$tdir/d1/d2 $DIR/$tdir/d3/d2 &
 	PID1=$!
 	sleep 1
 
-	rm -r $DIR2/d1
+	rm -r $DIR2/$tdir/d1
 	wait $PID1 && error "(2) mv succeeded"
 
-	rm -rf $DIR/d3
+	rm -rf $DIR/$tdir
 }
 run_test 55b "rename vs unlink source dir"
 
 test_55c()
 {
-	mkdir -p $DIR/d1/d2 $DIR/d3 || error "(1) mkdir failed"
+	mkdir_on_mdt0 $DIR/$tdir
+	mkdir -p $DIR/$tdir/d1/d2 $DIR/$tdir/d3 || error "(1) mkdir failed"
 
 #define OBD_FAIL_MDS_RENAME4              0x156
 	do_facet mds1 $LCTL set_param fail_loc=0x156
 
-	mv -T $DIR/d1/d2 $DIR/d3/d2 &
+	mv -T $DIR/$tdir/d1/d2 $DIR/$tdir/d3/d2 &
 	PID1=$!
 	sleep 1
 
 	# while rename is sleeping, open and remove d3
-	$MULTIOP $DIR2/d3 D_c &
+	$MULTIOP $DIR2/$tdir/d3 D_c &
 	PID2=$!
 	sleep 1
-	rm -rf $DIR2/d3
+	rm -rf $DIR2/$tdir/d3
 	sleep 5
 
 	# while rename is sleeping 2nd time, close d3
@@ -2718,35 +3723,54 @@ test_55c()
 
 	wait $PID1 && error "(2) mv succeeded"
 
-	rm -rf $DIR/d1
+	rm -rf $DIR/$tdir
 }
 run_test 55c "rename vs unlink orphan target dir"
 
 test_55d()
 {
-	touch $DIR/f1
+	mkdir_on_mdt0 $DIR/$tdir
+
+	touch $DIR/$tdir/f1
 
 #define OBD_FAIL_MDS_RENAME3              0x155
 	do_facet mds1 $LCTL set_param fail_loc=0x155
-	mv $DIR/f1 $DIR/$tdir &
+	mv $DIR/$tdir/f1 $DIR/$tdir/$tdir &
 	PID1=$!
 	sleep 2
 
 	# while rename is sleeping, create $tdir, but as a directory
-	mkdir -p $DIR2/$tdir || error "(1) mkdir failed"
+	mkdir -p $DIR2/$tdir/$tdir || error "(1) mkdir failed"
 
 	# link in reverse locking order
-	ln $DIR2/f1 $DIR2/$tdir/
+	ln $DIR2/$tdir/f1 $DIR2/$tdir/$tdir/f1 || error "(2) ln failed"
 
-	wait $PID1 && error "(2) mv succeeded"
-	rm -rf $DIR/f1
+	! wait $PID1 || error "(3) mv succeeded"
+	rm -rf $DIR/$tdir
 }
 run_test 55d "rename file vs link"
 
+test_56a() {
+	$LFS setstripe -c 1 $MOUNT/$tfile || error "creating $MOUNT/$tfile"
+	stack_trap "rm -f $MOUNT/$tfile"
+	echo "run_llverdev $MOUNT/$tfile -p -s $((16000000)) -c 4k"
+	run_llverdev $MOUNT/$tfile -p -s $((16000000)) -c 4k ||
+		error "llverdev failed with rc=$?"
+}
+run_test 56a "test llverdev with single large stripe"
+
+test_56b() {
+	$LFS setstripe -C 2000 $MOUNT/$tfile || error "creating $MOUNT/$tfile"
+	stack_trap "rm -f $MOUNT/$tfile"
+	echo "run_llverdev $MOUNT/$tfile -p -s $((16000000 * OSTCOUNT)) -c 4k"
+	run_llverdev $MOUNT/$tfile -p -s $((16000000 * OSTCOUNT)) -c 4k ||
+		error "llverdev failed with rc=$?"
+}
+run_test 56b "test llverdev and partial verify of wide stripe file"
+
 test_60() {
-	local MDSVER=$(lustre_build_version $SINGLEMDS)
-	[ $(version_code $MDSVER) -lt $(version_code 2.3.0) ] &&
-		skip "MDS version $MDSVER must be >= 2.3.0" && return 0
+	[ $MDS1_VERSION -lt $(version_code 2.3.0) ] &&
+		skip "MDS version must be >= 2.3.0"
 
 	# Create a file
 	test_mkdir $DIR1/$tdir
@@ -2832,42 +3856,39 @@ test_70b() { # LU-2781
 run_test 70b "remove files after calling rm_entry"
 
 test_71a() {
-	local server_version=$(lustre_version_code $SINGLEMDS)
-
-	[[ $server_version -lt $(version_code 2.1.6) ]] &&
-		skip "Need MDS version at least 2.1.6" && return
+	[[ "$MDS1_VERSION" -lt $(version_code 2.1.6) ]] &&
+		skip "Need MDS version at least 2.1.6"
 
 	# Patch not applied to 2.2 and 2.3 branches
-	[[ $server_version -ge $(version_code 2.2.0) ]] &&
-	[[ $server_version -lt $(version_code 2.4.0) ]] &&
-		skip "Need MDS version earlier than 2.2.0 or at least 2.4.0" &&
-			return
+	[[ "$MDS1_VERSION" -ge $(version_code 2.2.0) ]] &&
+	[[ "$MDS1_VERSION" -lt $(version_code 2.4.0) ]] &&
+		skip "Need MDS version earlier than 2.2.0 or at least 2.4.0"
 
 	checkfiemap --test ||
-		{ skip "checkfiemap not runnable: $?" && return; }
+		skip "checkfiemap not runnable: $?"
 	# write data this way: hole - data - hole - data
-	dd if=/dev/urandom of=$DIR1/$tfile bs=40K seek=1 count=1
-	[ "$(facet_fstype ost$(($($GETSTRIPE -i $DIR1/$tfile) + 1)))" = \
+	dd if=/dev/urandom of=$DIR1/$tfile bs=64K seek=1 count=1
+	[ "$(facet_fstype ost$(($($LFS getstripe -i $DIR1/$tfile) + 1)))" = \
 		"zfs" ] &&
 		skip "ORI-366/LU-1941: FIEMAP unimplemented on ZFS" && return 0
-	dd if=/dev/urandom of=$DIR1/$tfile bs=40K seek=3 count=1
+	dd if=/dev/urandom of=$DIR1/$tfile bs=64K seek=3 count=1
 	GET_STAT="lctl get_param -n ldlm.services.ldlm_cbd.stats"
 	stat $DIR2/$tfile
 	local can1=$($GET_STAT | awk '/ldlm_bl_callback/ {print $2}')
 	echo $can1
-	checkfiemap $DIR2/$tfile 81920 ||
+	checkfiemap $DIR2/$tfile 131072 ||
 		error "data is not flushed from client"
 	local can2=$($GET_STAT | awk '/ldlm_bl_callback/ {print $2}')
 	echo $can2
 
 	# common case of "create file, copy file" on a single node
 	# should not flush data from ost
-	dd if=/dev/urandom of=$DIR1/$tfile bs=40K seek=1 count=1
-	dd if=/dev/urandom of=$DIR1/$tfile bs=40K seek=3 count=1
+	dd if=/dev/urandom of=$DIR1/$tfile bs=64K seek=1 count=1
+	dd if=/dev/urandom of=$DIR1/$tfile bs=64K seek=3 count=1
 	stat $DIR1/$tfile
 	local can3=$($GET_STAT | awk '/ldlm_bl_callback/ {print $2}')
 	echo $can3
-	checkfiemap $DIR1/$tfile 81920 ||
+	checkfiemap $DIR1/$tfile 131072 ||
 	error 4
 	local can4=$($GET_STAT | awk '/ldlm_bl_callback/ {print $2}')
 	echo $can2
@@ -2876,32 +3897,91 @@ test_71a() {
 run_test 71a "correct file map just after write operation is finished"
 
 test_71b() {
-	local server_version=$(lustre_version_code $SINGLEMDS)
-
-	[[ $server_version -lt $(version_code 2.1.6) ]] &&
-		skip "Need MDS version at least 2.1.6" && return
+	[[ "$MDS1_VERSION" -lt $(version_code 2.1.6) ]] &&
+		skip "Need MDS version at least 2.1.6"
 
 	# Patch not applied to 2.2 and 2.3 branches
-	[[ $server_version -ge $(version_code 2.2.0) ]] &&
-	[[ $server_version -lt $(version_code 2.4.0) ]] &&
-		skip "Need MDS version earlier than 2.2.0 or at least 2.4.0" &&
-			return
-	[[ $OSTCOUNT -ge 2 ]] || { skip "needs >= 2 OSTs"; return; }
+	[[ "$MDS1_VERSION" -ge $(version_code 2.2.0) ]] &&
+	[[ "$MDS1_VERSION" -lt $(version_code 2.4.0) ]] &&
+		skip "Need MDS version earlier than 2.2.0 or at least 2.4.0"
+	[[ $OSTCOUNT -ge 2 ]] || skip "needs >= 2 OSTs"
 
 	checkfiemap --test ||
-		{ skip "error $?: checkfiemap failed" && return; }
+		skip "error $?: checkfiemap failed"
 
 	mkdir -p $DIR1/$tdir
 
 	$LFS setstripe -c -1 $DIR1/$tdir || error "setstripe failed"
-	dd if=/dev/urandom of=$DIR1/$tdir/$tfile bs=40K count=1
-	[ "$(facet_fstype ost$(($($GETSTRIPE -i $DIR1/$tdir/$tfile) + 1)))" = \
+	dd if=/dev/urandom of=$DIR1/$tdir/$tfile bs=64K count=1
+	[ "$(facet_fstype ost$(($($LFS getstripe -i $DIR1/$tdir/$tfile) + 1)))" = \
 		"zfs" ] &&
 		skip "ORI-366/LU-1941: FIEMAP unimplemented on ZFS" && return 0
-	checkfiemap $DIR1/$tdir/$tfile 40960 || error "checkfiemap failed"
+	checkfiemap $DIR1/$tdir/$tfile 65536 || error "checkfiemap failed"
 }
 run_test 71b "check fiemap support for stripecount > 1"
 
+_check_last_flag_with_filefrag()
+{
+	local file=$1
+	local count=$2
+	local i
+	local offset
+
+	echo "check last flag for file with $count extents"
+	rm -f $file
+	for ((i=0; i<$count; i++)); do
+		offset=$((i * 256))
+		dd if=/dev/zero of=$file bs=4K count=1 seek=$offset 2> /dev/null
+	done
+
+	filefrag -s -v $file | grep "last" ||
+		error "test file with $i extents failed"
+
+	rm -f $file
+}
+
+test_71c() {
+	local file="$DIR1/$tdir/$tfile"
+
+	(( $CLIENT_VERSION >= $(version_code 2.15.57) )) ||
+		skip "Need client version >= 2.15.57"
+	[ $(facet_fstype ost1) = "ldiskfs" ] ||
+		skip "support only ldiskfs ost"
+	filefrag -V | grep wc ||
+		skip "need whamcloud version of e2fsprogs"
+
+	mkdir -p $DIR1/$tdir
+
+	# filefrag uses u64[2028] buffer to fetch fiemap. The number of extents
+	# in the buffer is (8 * 2048 - 32) / 56 = 292. Test file with 291, 292
+	# and 293 extents
+	_check_last_flag_with_filefrag $file 291
+	_check_last_flag_with_filefrag $file 292
+	_check_last_flag_with_filefrag $file 293
+}
+run_test 71c "check FIEMAP_EXTENT_LAST flag with different extents number"
+
+test_71d() { #LU-17110
+	checkfiemap --test ||
+		skip "error $?: checkfiemap failed"
+
+	local f=$DIR/$tfile
+
+	# write data this way: hole - data - hole - data
+	dd if=/dev/urandom of=$f bs=64K count=1
+	[[ "$(facet_fstype ost$(($($LFS getstripe -i $f) + 1)))" != "zfs" ]] ||
+		skip "ORI-366/LU-1941: FIEMAP unimplemented on ZFS"
+	dd if=/dev/urandom of=$f bs=64K seek=2 count=1
+	dd if=/dev/urandom of=$f bs=64K seek=4 count=1
+	dd if=/dev/urandom of=$f bs=64K seek=6 count=1 conv=fsync
+	echo "disk usage: $(du -B1 $f)"
+	echo "file size: $(du -b $f)"
+
+	checkfiemap --corruption_test $f $((4 * 64 *1024)) ||
+		error "checkfiemap failed"
+}
+run_test 71d "fiemap corruption test with fm_extent_count=0"
+
 test_72() {
 	local p="$TMP/sanityN-$TESTNAME.parameters"
 	local tlink1
@@ -2948,12 +4028,15 @@ test_73() {
 	clear_stats llite.*.stats
 	# PR lock should be cached by now on both clients
 	getfattr -n user.attr1 $DIR1/$tfile || error "getfattr3 failed"
-	# 2 hits for getfattr(0)+getfattr(size)
-	[ $(calc_stats llite.*.stats getxattr_hits) -eq 2 ] ||
+	# At least 2 hits for getfattr(0)+getfattr(size)
+	# There may be more if auditd has a filesystem-related rule enabled
+	(( $(calc_stats llite.*.stats getxattr_hits) >= 2 )) ||
 		error "not cached in $DIR1"
+	clear_stats llite.*.stats
 	getfattr -n user.attr1 $DIR2/$tfile || error "getfattr4 failed"
-	# 4 hits for more getfattr(0)+getfattr(size)
-	[ $(calc_stats llite.*.stats getxattr_hits) -eq 4 ] ||
+	# At least 2 hits for getfattr(0)+getfattr(size)
+	# There may be more if auditd has a filesystem-related rule enabled
+	(( $(calc_stats llite.*.stats getxattr_hits) >= 2 )) ||
 		error "not cached in $DIR2"
 	rm -f $DIR2/$tfile
 
@@ -2963,8 +4046,8 @@ test_73() {
 run_test 73 "getxattr should not cause xattr lock cancellation"
 
 test_74() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.4.93) ] &&
-		skip "Need MDS version at least 2.4.93" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.4.93) ] &&
+		skip "Need MDS version at least 2.4.93"
 
 	dd if=/dev/zero of=$DIR1/$tfile-1 bs=1K count=1
 	dd if=/dev/zero of=$DIR1/$tfile-2 bs=1K count=1
@@ -2995,10 +4078,10 @@ test_75() {
 run_test 75 "osc: upcall after unuse lock==================="
 
 test_76() { #LU-946
-	[[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.5.53) ]] &&
-		skip "Need MDS version at least 2.5.53" && return
+	[[ "$MDS1_VERSION" -lt $(version_code 2.5.53) ]] &&
+		skip "Need MDS version at least 2.5.53"
 
-	remote_mds_nodsh && skip "remote MDS with nodsh" && return
+	remote_mds_nodsh && skip "remote MDS with nodsh"
 	local fcount=$((MDSCOUNT * 256))
 	declare -a fd_list
 	declare -a fid_list
@@ -3082,37 +4165,63 @@ nrs_write_read() {
 	local n=16
 	local dir=$DIR/$tdir
 	local myRUNAS="$1"
+	local create_as="$2"
 
 	mkdir $dir || error "mkdir $dir failed"
 	$LFS setstripe -c $OSTCOUNT $dir || error "setstripe to $dir failed"
 	chmod 777 $dir
 
+	if [[ -n "$create_as" ]]; then
+		do_nodes $CLIENTS $create_as "touch $dir/nrs_r_\$HOSTNAME;" ||
+			error "touch failed for $dir/nrs_r_*"
+		do_nodes $CLIENTS $create_as touch "$dir/nrs_w_\$HOSTNAME" ||
+			error "touch failed for $dir/nrs_w_*"
+		do_nodes $CLIENTS $create_as "chmod 777 $dir/nrs_*_\$HOSTNAME;" ||
+			error "chmod failed for $dir/nrs_*"
+	fi
+
 	do_nodes $CLIENTS $myRUNAS \
-		dd if=/dev/zero of="$dir/nrs_r_$HOSTNAME" bs=1M count=$n ||
+		dd if=/dev/zero of="$dir/nrs_r_\$HOSTNAME" bs=1M count=$n ||
 		error "dd at 0 on client failed (1)"
 
-	for ((i = 0; i < $n; i++)); do
-		do_nodes $CLIENTS $myRUNAS dd if=/dev/zero \
-			of="$dir/nrs_w_$HOSTNAME" bs=1M seek=$i count=1 ||
-			 error "dd at ${i}MB on client failed (2)" &
-		local pids_w[$i]=$!
-	done
+	do_nodes $CLIENTS $myRUNAS \
+		"declare -a pids_w;
+		for ((i = 0; i < $n; i++)); do
+			dd if=/dev/zero of=$dir/nrs_w_\$HOSTNAME bs=1M \
+seek=\\\$i count=1 conv=notrunc &
+			pids_w[\\\$i]=\\\$!;
+		done;
+		rc_w=0;
+		for ((i = 0; i < $n; i++)); do
+			wait \\\${pids_w[\\\$i]};
+			newrc=\\\$?;
+			[ \\\$newrc -gt \\\$rc_w ] && rc_w=\\\$newrc;
+		done;
+		exit \\\$rc_w" &
+	local pid_w=$!
 	do_nodes $CLIENTS sync;
 	cancel_lru_locks osc
 
-	for ((i = 0; i < $n; i++)); do
-		do_nodes $CLIENTS $myRUNAS dd if="$dir/nrs_w_$HOSTNAME" \
-			of=/dev/zero bs=1M seek=$i count=1 > /dev/null ||
-			error "dd at ${i}MB on client failed (3)" &
-		local pids_r[$i]=$!
-	done
+	do_nodes $CLIENTS $myRUNAS \
+		"declare -a pids_r;
+		for ((i = 0; i < $n; i++)); do
+			dd if=$dir/nrs_r_\$HOSTNAME bs=1M of=/dev/null \
+seek=\\\$i count=1 &
+			pids_r[\\\$i]=\\\$!;
+		done;
+		rc_r=0;
+		for ((i = 0; i < $n; i++)); do
+			wait \\\${pids_r[\\\$i]};
+			newrc=\\\$?;
+			[ \\\$newrc -gt \\\$rc_r ] && rc_r=\\\$newrc;
+		done;
+		exit \\\$rc_r" &
+	local pid_r=$!
 	cancel_lru_locks osc
 
-	for ((i = 0; i < $n; i++)); do
-		wait ${pids_w[$i]}
-		wait ${pids_r[$i]}
-	done
-	rm -rf $dir || error "rm -rf $dir failed"
+	wait $pid_w || error "dd (write) failed (2)"
+	wait $pid_r || error "dd (read) failed (3)"
+	rm -rvf $dir || error "rm -rf $dir failed"
 }
 
 test_77a() { #LU-3266
@@ -3236,6 +4345,7 @@ tbf_verify() {
 	local dir=$DIR/$tdir
 	local client1=${CLIENT1:-$(hostname)}
 	local myRUNAS="$3"
+	local create_as="$4"
 
 	local np=$(check_cpt_number ost1)
 	[ $np -gt 0 ] || error "CPU partitions should not be $np."
@@ -3245,6 +4355,11 @@ tbf_verify() {
 	$LFS setstripe -c 1 -i 0 $dir || error "setstripe to $dir failed"
 	chmod 777 $dir
 
+	if [[ -n "$create_as" ]]; then
+		$create_as touch $dir/tbf
+		chmod 777 $dir/tbf
+	fi
+
 	trap cleanup_tbf_verify EXIT
 	echo "Limited write rate: $1, read rate: $2"
 	echo "Verify the write rate is under TBF control"
@@ -3289,7 +4404,7 @@ test_77e() {
 
 	local idis
 	local rateis
-	if [ $(lustre_version_code ost1) -ge $(version_code 2.8.54) ]; then
+	if [ "$OST1_VERSION" -ge $(version_code 2.8.54) ]; then
 		idis="nid="
 		rateis="rate="
 	fi
@@ -3339,14 +4454,13 @@ test_77f() {
 	[[ $rc -eq 3 ]] && skip "jobid_var not found" && return
 	[[ $rc -ne 0 ]] && error "failed to get param jobid_var"
 	if [ $saved_jobid_var != procname_uid ]; then
-		set_conf_param_and_check client			\
-			"$LCTL get_param -n jobid_var"		\
-			"$FSNAME.sys.jobid_var" procname_uid
+		set_persistent_param_and_check client \
+			"jobid_var" "$FSNAME.sys.jobid_var" procname_uid
 	fi
 
 	local idis
 	local rateis
-	if [ $(lustre_version_code ost1) -ge $(version_code 2.8.54) ]; then
+	if [ "$OST1_VERSION" -ge $(version_code 2.8.54) ]; then
 		idis="jobid="
 		rateis="rate="
 	fi
@@ -3378,9 +4492,8 @@ test_77f() {
 	local current_jobid_var=$($LCTL get_param -n jobid_var)
 	[[ $? -ne 0 ]] && error "failed to get param jobid_var"
 	if [ $saved_jobid_var != $current_jobid_var ]; then
-		set_conf_param_and_check client			\
-			"$LCTL get_param -n jobid_var"		\
-			"$FSNAME.sys.jobid_var" $saved_jobid_var
+		set_persistent_param_and_check client \
+			"jobid_var" "$FSNAME.sys.jobid_var" $saved_jobid_var
 	fi
 	return 0
 }
@@ -3402,7 +4515,7 @@ test_77g() {
 
 	local idis
 	local rateis
-	if [ $(lustre_version_code ost1) -ge $(version_code 2.8.54) ]; then
+	if [ "$OST1_VERSION" -ge $(version_code 2.8.54) ]; then
 		idis="jobid="
 		rateis="rate="
 	fi
@@ -3419,8 +4532,8 @@ test_77g() {
 run_test 77g "Change TBF type directly"
 
 test_77h() {
-	[ $(lustre_version_code ost1) -ge $(version_code 2.8.55) ] ||
-		{ skip "Need OST version at least 2.8.55"; return 0; }
+	[ "$OST1_VERSION" -ge $(version_code 2.8.55) ] ||
+		skip "Need OST version at least 2.8.55"
 
 	local old_policy=$(do_facet ost1 \
 		lctl get_param ost.OSS.ost_io.nrs_policies)
@@ -3474,8 +4587,8 @@ tbf_rule_check()
 }
 
 test_77i() {
-	[ $(lustre_version_code ost1) -ge $(version_code 2.8.55) ] ||
-		{ skip "Need OST version at least 2.8.55"; return 0; }
+	[ "$OST1_VERSION" -ge $(version_code 2.8.55) ] ||
+		skip "Need OST version at least 2.8.55"
 
 	for i in $(seq 1 $OSTCOUNT)
 	do
@@ -3529,11 +4642,10 @@ run_test 77i "Change rank of TBF rule"
 test_77j() {
 	local idis
 	local rateis
-	local ost_version=$(lustre_version_code ost1)
 
-	[ $ost_version -ge $(version_code 2.9.53) ] ||
-		{ skip "Need OST version at least 2.9.53"; return 0; }
-	if [ $ost_version -ge $(version_code 2.8.60) ]; then
+	[ "$OST1_VERSION" -ge $(version_code 2.9.53) ] ||
+		skip "Need OST version at least 2.9.53"
+	if [ "$OST1_VERSION" -ge $(version_code 2.8.60) ]; then
 		idis="opcode="
 		rateis="rate="
 	fi
@@ -3564,6 +4676,8 @@ test_id() {
 	local idstr="${1}id"
 	local policy="${idstr}={$2}"
 	local rate="rate=$3"
+	local runas_args="$4"
+	local createas_args="${5:-$runas_args}"
 
 	do_nodes $(comma_list $(osts_nodes)) \
 		lctl set_param jobid_var=procname_uid \
@@ -3571,8 +4685,8 @@ test_id() {
 			ost.OSS.ost_io.nrs_tbf_rule="start\ ost_${idstr}\ ${policy}\ ${rate}"
 	[ $? -ne 0 ] && error "failed to set tbf ${idstr} policy"
 
-	nrs_write_read "runas $4"
-	tbf_verify $3 $3 "runas $4"
+	nrs_write_read "runas $runas_args" "runas $createas_args"
+	tbf_verify $3 $3 "runas $runas_args" "runas $createas_args"
 
 	do_nodes $(comma_list $(osts_nodes)) \
 		lctl set_param ost.OSS.ost_io.nrs_tbf_rule="stop\ ost_${idstr}" \
@@ -3585,15 +4699,24 @@ test_id() {
 }
 
 test_77ja(){
-	if [ $(lustre_version_code ost1) -lt $(version_code 2.11.50) ]; then
+	if [ "$OST1_VERSION" -lt $(version_code 2.11.50) ]; then
 		skip "Need OST version at least 2.11.50"
-		return 0
 	fi
-	test_id "u" "500" "5" "-u 500"
-	test_id "g" "500" "5" "-u 500 -g 500"
+
+	test_id "u" "$RUNAS_ID" "5" "-u $RUNAS_ID"
+	test_id "g" "$RUNAS_GID" "5" "-u $RUNAS_ID -g $RUNAS_GID"
 }
 run_test 77ja "check TBF-UID/GID NRS policy"
 
+test_77jb() { # LU-16077
+	(( "$OST1_VERSION" >= $(version_code 2.15.51) )) ||
+		skip "Need OST version at least 2.15.51"
+
+	test_id "u" "$RUNAS_ID" "5" "-u $RUNAS_ID" "-u 0 -g $RUNAS_GID"
+	test_id "g" "$RUNAS_GID" "5" "-u $RUNAS_ID -g $RUNAS_GID" "-u $RUNAS_ID -g 0"
+}
+run_test 77jb "check TBF-UID/GID NRS policy on files that don't belong to us"
+
 cleanup_77k()
 {
 	local rule_lists=$1
@@ -3612,8 +4735,8 @@ cleanup_77k()
 }
 
 test_77k() {
-	[[ $(lustre_version_code ost1) -ge $(version_code 2.9.53) ]] ||
-		{ skip "Need OST version at least 2.9.53"; return 0; }
+	[[ "$OST1_VERSION" -ge $(version_code 2.9.53) ]] ||
+		skip "Need OST version at least 2.9.53"
 
 	do_nodes $(comma_list $(osts_nodes)) \
 		lctl set_param ost.OSS.ost_io.nrs_policies="tbf" \
@@ -3655,39 +4778,39 @@ test_77k() {
 
 	trap "cleanup_77k \"ext_a ext_b\" \"fifo\"" EXIT
 
-	[[ $(lustre_version_code ost1) -ge $(version_code 2.10.58) ]] ||
-		{ skip "Need OST version at least 2.10.58"; return 0; }
+	[[ "$OST1_VERSION" -ge $(version_code 2.10.58) ]] ||
+		skip "Need OST version at least 2.10.58"
 
 	do_nodes $(comma_list $(osts_nodes)) \
 		lctl set_param ost.OSS.ost_io.nrs_tbf_rule="stop\ ext_a" \
 			ost.OSS.ost_io.nrs_tbf_rule="stop\ ext_b" \
-			ost.OSS.ost_io.nrs_tbf_rule="start\ ext_ug\ uid={500}\&gid={1000}\ rate=5"
-	nrs_write_read "runas -u 500 -g 1000"
-	tbf_verify 5 5 "runas -u 500 -g 1000"
+			ost.OSS.ost_io.nrs_tbf_rule="start\ ext_ug\ uid={$RUNAS_ID}\&gid={$RUNAS_GID}\ rate=5"
+	nrs_write_read "runas -u $RUNAS_ID -g $RUNAS_GID"
+	tbf_verify 5 5 "runas -u $RUNAS_ID -g $RUNAS_GID"
 
 	do_nodes $(comma_list $(osts_nodes)) \
 		lctl set_param ost.OSS.ost_io.nrs_tbf_rule="stop\ ext_ug" \
-			ost.OSS.ost_io.nrs_tbf_rule="start\ ext_uw\ uid={500}\&opcode={ost_write}\ rate=20" \
-			ost.OSS.ost_io.nrs_tbf_rule="start\ ext_ur\ uid={500}\&opcode={ost_read}\ rate=10"
+			ost.OSS.ost_io.nrs_tbf_rule="start\ ext_uw\ uid={$RUNAS_ID}\&opcode={ost_write}\ rate=20" \
+			ost.OSS.ost_io.nrs_tbf_rule="start\ ext_ur\ uid={$RUNAS_ID}\&opcode={ost_read}\ rate=10"
 
-	nrs_write_read "runas -u 500"
-	tbf_verify 20 10 "runas -u 500"
+	nrs_write_read "runas -u $RUNAS_ID"
+	tbf_verify 20 10 "runas -u $RUNAS_ID"
 
 	do_nodes $(comma_list $(osts_nodes)) \
 		lctl set_param ost.OSS.ost_io.nrs_tbf_rule="stop\ ext_uw" \
 			ost.OSS.ost_io.nrs_tbf_rule="stop\ ext_ur" \
-			ost.OSS.ost_io.nrs_tbf_rule="start\ ext_a\ uid={500},opcode={ost_write}\ rate=20" \
-			ost.OSS.ost_io.nrs_tbf_rule="start\ ext_b\ uid={500},opcode={ost_read}\ rate=10"
-	nrs_write_read "runas -u 500"
-	tbf_verify 10 10 "runas -u 500"
-	tbf_verify 20 10 "runas -u 500"
+			ost.OSS.ost_io.nrs_tbf_rule="start\ ext_a\ uid={$RUNAS_ID},opcode={ost_write}\ rate=20" \
+			ost.OSS.ost_io.nrs_tbf_rule="start\ ext_b\ uid={$RUNAS_ID},opcode={ost_read}\ rate=10"
+	nrs_write_read "runas -u $RUNAS_ID"
+	tbf_verify 10 10 "runas -u $RUNAS_ID"
+	tbf_verify 20 10 "runas -u $RUNAS_ID"
 	cleanup_77k "ext_a ext_b" "fifo"
 }
-run_test 77k "check TBF policy with NID/JobID/OPCode expression"
+run_test 77k "check TBF policy with UID/GID/JobID/OPCode expression"
 
 test_77l() {
-	[[ $(lustre_version_code ost1) -ge $(version_code 2.10.56) ]] ||
-		{ skip "Need OST version at least 2.10.56"; return 0; }
+	[[ "$OST1_VERSION" -ge $(version_code 2.10.56) ]] ||
+		skip "Need OST version at least 2.10.56"
 
 	do_facet ost1 lctl set_param ost.OSS.ost_io.nrs_policies="tbf\ nid"
 	do_facet ost1 lctl set_param ost.OSS.ost_io.nrs_policies="tbf"
@@ -3706,9 +4829,8 @@ test_77l() {
 run_test 77l "check the output of NRS policies for generic TBF"
 
 test_77m() {
-	if [ $(lustre_version_code ost1) -lt $(version_code 2.9.54) ]; then
+	if [ "$OST1_VERSION" -lt $(version_code 2.9.54) ]; then
 		skip "Need OST version at least 2.9.54"
-		return 0
 	fi
 
 	local dir=$DIR/$tdir
@@ -3758,17 +4880,15 @@ test_77m() {
 run_test 77m "check NRS Delay slows write RPC processing"
 
 test_77n() { #LU-10802
-	if [ $(lustre_version_code ost1) -lt $(version_code 2.10.58) ]; then
+	if [ "$OST1_VERSION" -lt $(version_code 2.10.58) ]; then
 		skip "Need OST version at least 2.10.58"
-		return 0
 	fi
 
 	# Configure jobid_var
 	local saved_jobid_var=$($LCTL get_param -n jobid_var)
 	if [ $saved_jobid_var != procname_uid ]; then
-		set_conf_param_and_check client			\
-			"$LCTL get_param -n jobid_var"		\
-			"$FSNAME.sys.jobid_var" procname_uid
+		set_persistent_param_and_check client \
+			"jobid_var" "$FSNAME.sys.jobid_var" procname_uid
 	fi
 
 	do_nodes $(comma_list $(osts_nodes)) \
@@ -3794,13 +4914,209 @@ test_77n() { #LU-10802
 
 	local current_jobid_var=$($LCTL get_param -n jobid_var)
 	if [ $saved_jobid_var != $current_jobid_var ]; then
-		set_conf_param_and_check client			\
-			"$LCTL get_param -n jobid_var"		\
-			"$FSNAME.sys.jobid_var" $saved_jobid_var
+		set_persistent_param_and_check client \
+			"jobid_var" "$FSNAME.sys.jobid_var" $saved_jobid_var
 	fi
 }
 run_test 77n "check wildcard support for TBF JobID NRS policy"
 
+test_77o() {
+	(( $OST1_VERSION > $(version_code 2.14.54) )) ||
+        	skip "need OST > 2.14.54"
+
+	do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_policies="tbf\ nid"
+	do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_tbf_rule="start\ name\ nid={192.168.*.*@tcp}\ rate=10000"
+	do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_tbf_rule="start\ name1\ nid={192.168.*.*@tcp}\ rate=10000"
+	do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_tbf_rule="change\ name1\ rank=name"
+	do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_tbf_rule="stop\ name"
+	do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_policies="fifo"
+}
+run_test 77o "Changing rank should not panic"
+
+test_77q() {
+	local i
+	local gidlist="500 10 33   100 "
+	local uidlist=" 500  11 3"
+
+	(( $MDS1_VERSION > $(version_code 2.14.54) )) ||
+		skip "need MDS >= 2.14.54"
+
+	do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_policies="tbf"
+	stack_trap "do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_policies=fifo"
+
+	# require 44cc782/LU-9859 to support list with unexpected spaces
+	(( MDS1_VERSION >= $(version_code 2.15.57) )) ||
+		gidlist=$(echo $gidlist) uidlist=$(echo $uidlist)
+
+	for i in {1..50}; do
+		local pid1 pid2
+
+		do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_tbf_rule="'start rule77q_1 uid={$uidlist}&gid={$gidlist} rate=100'" &
+		pid1=$!
+		do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_tbf_rule="'start rule77q_2 uid={1000}&gid={1000} rate=100'" &
+		pid2=$!
+		wait $pid1 || error "$i: Fail to start TBF rule 'rule77q_1'"
+		wait $pid2 || error "$i: Fail to start TBF rule 'rule77q_2'"
+
+		do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_tbf_rule="'stop rule77q_1'" &
+		pid1=$!
+		do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_tbf_rule="'stop rule77q_2'" &
+		pid2=$!
+		wait $pid1 || error "$i: Fail to stop TBF rule 'rule77q_1'"
+		wait $pid2 || error "$i: Fail to stop TBF rule 'rule77q_2'"
+	done
+}
+run_test 77q "Parallel TBF rule definitions should not panic"
+
+test_77p() {
+	local c
+	local -a spec_chars=(
+		'@' '.' '~' '#' '/' '^' '%' '*' ';' ',' '?' '<' '>' ':'
+		'+' '=' ')' '(' '{' '}' '|' '[' ']' '!' '&' '\$' '\`' '\\')
+
+	(( $MDS1_VERSION > $(version_code 2.14.54) )) ||
+		skip "need MDS >= 2.14.54"
+
+	do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_policies="tbf"
+	stack_trap "do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_policies=fifo"
+
+	# TBF rule name size is 16 bytes
+	do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_tbf_rule="start\ test_77p_overflo\ uid={500}\ rate=500" &&
+		error "The length of tbf rule name is not checked" || true
+	do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_tbf_rule="start\ \ uid={500}\ rate=500" &&
+		error "The server should not accept empty tbf rule name" || true
+	do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_tbf_rule="start\ test_77p_empty" &&
+		error "The server should not accept 'start <tbf_rule_name>' without an expression" || true
+
+	# Test with special chars
+	for c in "${spec_chars[@]}"; do
+		do_facet mds1 $LCTL set_param mds.MDS.mdt.nrs_tbf_rule="'start test77p${c}spec uid={500} rate=500'" &&
+		error "Special char '${c}' should not be accepted in a tbf rule name" || true
+	done
+
+}
+run_test 77p "Check validity of rule names for TBF policies"
+
+cleanup_77r() {
+	local pid=$1
+	local saved_jobid=$2
+	local current_jobid_var
+
+	echo "cleanup 77r $pid"
+
+	do_facet mds1 $LCTL set_param -n mds.MDS.mdt.nrs_policies=fifo
+	kill $pid || echo "fail to kill md thread"
+
+	current_jobid_var=$($LCTL get_param -n jobid_var)
+	if [ $saved_jobid != $current_jobid_var ]; then
+		set_persistent_param_and_check client \
+			"jobid_var" "$FSNAME.sys.jobid_var" $saved_jobid
+	fi
+
+	sleep 2
+	rm -rf $DIR1/$tdir
+}
+
+md_thread_run="true"
+md_thread_77r() {
+	local pid
+
+	while $md_thread_run; do
+		printf '%s\n' {$DIR1,$DIR2}/$tdir/${tfile}-{01..20} |
+			xargs -P20 -I{} $RUNAS bash -c 'touch {}; rm -f {}' \
+				&> /dev/null & pid=$!
+		trap "echo kill md_thread xargs; md_thread_run=false; kill $pid" INT TERM
+		wait $pid
+	done
+}
+
+wait_policy_state() {
+	local state="$1"
+	local policy="$2"
+	local change_pid="$3"
+	local time
+
+	for time in {1..60}; do
+		local nbr_started
+
+		nbr_started=$(do_facet mds1 $LCTL get_param mds.MDS.mdt.nrs_policies |
+			egrep -A2 "name: ${policy}$" | grep -c "state: $state")
+
+		[[ "$nbr_started" != 2 ]] || return 0
+		sleep 1
+	done
+
+	[[ -z "$change_pid" ]] || kill $change_pid || true
+	return 1
+}
+
+test_77r() { #LU-14976
+
+	(( MDS1_VERSION > $(version_code 2.15.56) )) ||
+		skip "need MDS >= 2.15.56 c098c095 change nrs policies at run time"
+
+	local pid
+	local -A rules
+	local -a policies
+	local saved_jobid_var
+
+	rules["tbf uid"]="start md_rule uid={$RUNAS_ID} rate=1"
+	rules["tbf gid"]="start md_rule gid={$RUNAS_GID} rate=1"
+	rules["tbf jobid"]="start md_rule jobid={*.$RUNAS_ID} rate=1"
+	rules["tbf"]="start md_rule uid={$RUNAS_ID} rate=1"
+	policies=(
+	"tbf uid"
+	"tbf gid"
+	"tbf jobid"
+	"tbf"
+	"fifo"
+	)
+
+	test_mkdir -i 0 -c 1 $DIR1/$tdir
+	chmod 777 $DIR1/$tdir
+
+	# Configure jobid_var
+	saved_jobid_var=$($LCTL get_param -n jobid_var)
+	if [ $saved_jobid_var != procname_uid ]; then
+		set_persistent_param_and_check client \
+			"jobid_var" "$FSNAME.sys.jobid_var" procname_uid
+	fi
+
+	# start md thread
+	md_thread_77r & pid=$!
+	stack_trap "cleanup_77r $pid '$saved_jobid_var'"
+
+	local policy
+	for policy in "${policies[@]}"; do
+		local change_pid
+
+		# wait to queue requests
+		sleep 5
+
+		do_facet mds1 "$LCTL set_param mds.MDS.mdt.nrs_policies='$policy'" &
+		change_pid=$!
+
+		wait_policy_state "started" "$policy" "$change_pid" ||
+			error "timeout to start '$policy' policy"
+
+		[[ -n "${rules[$policy]}" ]] || continue
+
+		do_facet mds1 "$LCTL set_param mds.MDS.mdt.nrs_tbf_rule='${rules[$policy]}'" ||
+			error "fail to set rule '${rules[$policy]}' to '$policy'"
+	done
+
+	wait_policy_state "stopped" "tbf" ||
+		error "fail to stop tbf policy"
+
+	echo "check the number of requests in queue:"
+	local awkcmd='/name: / {last = $3} '
+	awkcmd+='/queued: / {printf "    %s: %d\n", last, $2;'
+	awkcmd+='	if (last == "tbf" && $2 > 0) exit 1;}'
+	do_facet mds1 $LCTL get_param mds.MDS.mdt.nrs_policies | awk "$awkcmd" ||
+		error "request leak in tbf policies"
+}
+run_test 77r "Change type of tbf policy at run time"
+
 test_78() { #LU-6673
 	local rc
 
@@ -3859,6 +5175,7 @@ test_80a() {
 	local file
 	local pid
 
+	mkdir_on_mdt0 $DIR1/$tdir
 	mkdir -p $DIR1/$tdir/dir
 	createmany -o $DIR1/$tdir/dir/f 10 ||
 		error "create files under remote dir failed $i"
@@ -3898,125 +5215,83 @@ cleanup_80b() {
 	kill -9 $migrate_pid
 }
 
+success_count=0
+failure_count=0
+
+run_and_count()
+{
+	eval $@ &>/dev/null && success_count=$((success_count + 1)) ||
+		failure_count=$((failure_count + 1))
+}
+
 test_80b() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
-	local migrate_dir1=$DIR1/$tdir/migrate_dir
-	local migrate_dir2=$DIR2/$tdir/migrate_dir
-	local migrate_run=$LUSTRE/tests/migrate.sh
+	local migdir1=$DIR1/$tdir/migrate_dir
+	local migdir2=$DIR2/$tdir/migrate_dir
 	local start_time
-	local end_time
-	local show_time=1
 	local mdt_idx
 	local rc=0
 	local rc1=0
 
 	trap cleanup_80b EXIT
-	#prepare migrate directory
-	mkdir -p $migrate_dir1
+	# prepare migrate directory
+	mkdir -p $migdir1
 	for F in {1,2,3,4,5}; do
-		echo "$F$F$F$F$F" > $migrate_dir1/file$F
+		echo "$F$F$F$F$F" > $migdir1/file$F
 		echo "$F$F$F$F$F" > $DIR/$tdir/file$F
 	done
 
-	#migrate the directories among MDTs
+	# migrate the directories among MDTs
 	(
 		while true; do
 			mdt_idx=$((RANDOM % MDSCOUNT))
-			$LFS migrate -m $mdt_idx $migrate_dir1 &>/dev/null ||
-				rc=$?
-			[ $rc -ne 0 -o $rc -ne 16 ] || break
+			# migrate may fail
+			$LFS migrate -m $mdt_idx $migdir1 &>/dev/null
 		done
 	) &
 	migrate_pid=$!
 
 	echo "start migration thread $migrate_pid"
-	#Access the files at the same time
-	start_time=$(date +%s)
-	echo "accessing the migrating directory for 5 minutes..."
-	while true; do
-		ls $migrate_dir2 > /dev/null || {
-			echo "read dir fails"
-			break
-		}
-		diff -u $DIR2/$tdir/file1 $migrate_dir2/file1 || {
-			echo "access file1 fails"
-			break
-		}
-
-		cat $migrate_dir2/file2 > $migrate_dir2/file3 || {
-			echo "access file2/3 fails"
-			break
-		}
-
-		echo "aaaaa" > $migrate_dir2/file4 > /dev/null || {
-			echo "access file4 fails"
-			break
-		}
-
-		stat $migrate_dir2/file5 > /dev/null || {
-			echo "stat file5 fails"
-			break
-		}
-
-		touch $migrate_dir2/source_file > /dev/null || rc1=$?
-		[ $rc1 -ne 0 -o $rc1 -ne 1 ] || {
-			echo "touch file failed with $rc1"
-			break;
-		}
-
-		if [ -e $migrate_dir2/source_file ]; then
-			ln $migrate_dir2/source_file $migrate_dir2/link_file \
-					&>/dev/null || rc1=$?
-			if [ -e $migrate_dir2/link_file ]; then
-				rm -rf $migrate_dir2/link_file
-			fi
-
-			mrename $migrate_dir2/source_file \
-				$migrate_dir2/target_file &>/dev/null || rc1=$?
-			[ $rc1 -ne 0 -o $rc1 -ne 1 ] || {
-				echo "rename failed with $rc1"
-				break
-			}
-
-			if [ -e $migrate_dir2/target_file ]; then
-				rm -rf $migrate_dir2/target_file &>/dev/null ||
-								rc1=$?
-			else
-				rm -rf $migrate_dir2/source_file &>/dev/null ||
-								rc1=$?
-			fi
-			[ $rc1 -ne 0 -o $rc1 -ne 1 ] || {
-				echo "unlink failed with $rc1"
-				break
-			}
-		fi
-
-		end_time=$(date +%s)
-		duration=$((end_time - start_time))
-		if [ $((duration % 10)) -eq 0 ]; then
-			if [ $show_time -eq 1 ]; then
-				echo "...$duration seconds"
-				show_time=0
-			fi
-		else
-			show_time=1
+	# access the files at the same time
+	start_time=$SECONDS
+	echo "accessing the migrating directory for 1 minute..."
+	while ((SECONDS - start_time < 60)); do
+		run_and_count ls $migdir2
+		run_and_count diff -u $DIR2/$tdir/file1 $migdir2/file1
+		run_and_count "cat $migdir2/file2 > $migdir2/file3"
+		run_and_count "echo "aaaaa" > $migdir2/file4"
+		run_and_count stat $migdir2/file5
+		run_and_count touch $migdir2/source_file
+		if [ -e $migdir2/source_file ]; then
+			run_and_count ln $migdir2/source_file \
+				$migdir2/link_file
+
+			[ -e $migdir2/link_file ] &&
+				rm -rf $migdir2/link_file
+
+			run_and_count mrename $migdir2/source_file \
+				$migdir2/target_file
+
+			[ -e $migdir2/target_file ] &&
+				run_and_count rm -rf $migdir2/target_file ||
+				run_and_count rm -rf $migdir2/source_file
 		fi
 
 		kill -0 $migrate_pid || {
 			echo "migration stopped 1"
 			break
 		}
-
-		[ $duration -ge 300 ] && break
 	done
 
-	#check migration are still there
+	# check migration are still there
 	kill -0 $migrate_pid || error "migration stopped 2"
 	cleanup_80b
+	# access during migration may fail
+	echo "concurrent access $failure_count failures, $success_count successes"
 }
 run_test 80b "Accessing directory during migration"
 
-test_81() {
+test_81a() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
 
 	rm -rf $DIR1/$tdir
@@ -4042,11 +5317,142 @@ test_81() {
 
 	return 0
 }
-run_test 81 "rename and stat under striped directory"
+run_test 81a "rename and stat under striped directory"
+
+test_81b() {
+	[ $MDSCOUNT -lt 2 ] &&
+		skip "We need at least 2 MDTs for this test"
+
+	local setattr_pid
+
+	$LFS mkdir -c $MDSCOUNT $DIR1/$tdir || error "$LFS mkdir"
+	createmany -o $DIR1/$tdir/$tfile. $COUNT || error "createmany"
+
+	(
+		while true; do
+			touch $DIR1/$tdir
+		done
+	) &
+	setattr_pid=$!
+
+	for ((i = 0; i < COUNT; i++)); do
+		mrename $DIR2/$tdir/$tfile.$i $DIR2/$tdir/$tfile-new.$i \
+			> /dev/null
+	done
+
+	kill -9 $setattr_pid
+}
+run_test 81b "rename under striped directory doesn't deadlock"
+
+test_81c() {
+	[ $MDSCOUNT -lt 4 ] && skip_env "needs >= 4 MDTs"
+	[ $MDS1_VERSION -lt $(version_code 2.13.52) ] &&
+		skip "Need MDS version at least 2.13.52"
+
+	# source is local, source parent is remote
+	$LFS mkdir -i 0 $DIR1/${tdir}_src || error "mkdir ${tdir}_src"
+	$LFS mkdir -i 1 $DIR1/${tdir}_tgt || error "mkdir ${tdir}_tgt"
+	$LFS mkdir -i 3 $DIR1/${tdir}_src/sub || error "mkdir sub"
+	$LFS mkdir -i 3 $DIR1/${tdir}_tgt/sub || error "mkdir sub"
+	stat $DIR2/${tdir}_src/sub || error "stat sub failed"
+	mv $DIR1/${tdir}_src/sub $DIR1/${tdir}_tgt/ || error "mv failed"
+	[ -f $DIR2/${tdir}_src/sub ] && error "sub should be gone"
+	rm -rf $DIR1/${tdir}_src $DIR1/${tdir}_tgt
+
+	# source is remote, source parent is local
+	$LFS mkdir -i 3 $DIR1/${tdir}_src || error "mkdir ${tdir}_src"
+	$LFS mkdir -i 1 $DIR1/${tdir}_tgt || error "mkdir ${tdir}_tgt"
+	$LFS mkdir -i 0 $DIR1/${tdir}_src/sub || error "mkdir sub"
+	$LFS mkdir -i 3 $DIR1/${tdir}_tgt/sub || error "mkdir sub"
+	stat $DIR2/${tdir}_src/sub || error "stat sub failed"
+	mv $DIR1/${tdir}_src/sub $DIR1/${tdir}_tgt/ || error "mv failed"
+	[ -f $DIR2/${tdir}_src/sub ] && error "sub should be gone"
+	rm -rf $DIR1/${tdir}_src $DIR1/${tdir}_tgt
+
+	# source and source parent are remote
+	$LFS mkdir -i 0 $DIR1/${tdir}_src || error "mkdir ${tdir}_src"
+	$LFS mkdir -i 1 $DIR1/${tdir}_tgt || error "mkdir ${tdir}_tgt"
+	mkdir $DIR1/${tdir}_src/sub || error "mkdir sub"
+	$LFS mkdir -i 3 $DIR1/${tdir}_tgt/sub || error "mkdir sub"
+	stat $DIR2/${tdir}_src/sub || error "stat sub failed"
+	mv $DIR1/${tdir}_src/sub $DIR1/${tdir}_tgt/ || error "mv failed"
+	[ -f $DIR2/${tdir}_src/sub ] && error "sub should be gone"
+	rm -rf $DIR1/${tdir}_src $DIR1/${tdir}_tgt
+
+	# source and source parent are remote, and source is remote object
+	$LFS mkdir -i 0 $DIR1/${tdir}_src || error "mkdir ${tdir}_src"
+	$LFS mkdir -i 1 $DIR1/${tdir}_tgt || error "mkdir ${tdir}_tgt"
+	$LFS mkdir -i 2 $DIR1/${tdir}_src/sub || error "mkdir sub"
+	$LFS mkdir -i 3 $DIR1/${tdir}_tgt/sub || error "mkdir sub"
+	stat $DIR2/${tdir}_src/sub || error "stat sub failed"
+	mv $DIR1/${tdir}_src/sub $DIR1/${tdir}_tgt/ || error "mv failed"
+	[ -f $DIR2/${tdir}_src/sub ] && error "sub should be gone" || true
+}
+run_test 81c "rename revoke LOOKUP lock for remote object"
+
+cleanup_81d() {
+	for ((mds = 0; mds < $MDSCOUNT; mds++)); do
+		local d2=$DIR2/$tdir-$mds
+
+		rm -rf $d2 &
+	done
+	wait || error "rm failed"
+}
+
+test_81d() {
+	local setattr_pid
+	local mdts=$(comma_list $(mdts_nodes))
+
+	do_nodes $mdts "$LCTL set_param mdt.*.md_stats=clear > /dev/null"
+
+	stack_trap cleanup_81d
+	for ((mds = 0; mds < $MDSCOUNT; mds++)); do
+		local d1=$DIR1/$tdir-$mds
+
+		$LFS mkdir -i $mds $d1 $d1/_temporary || error "mkdir failed"
+		createmany -o $d1/_temporary/$tfile. $COUNT ||
+			error "createmany failed for $d1/_temporary"
+	done
+
+	for ((mds = 0; mds < $MDSCOUNT; mds++)); do
+		local d1=$DIR1/$tdir-$mds
+		local d2=$DIR2/$tdir-$mds
+
+		for ((i = 0; i < COUNT; i++)); do
+			mrename $d1/_temporary/$tfile.$i $d1/$tfile.$i &
+			((i++))
+			mrename $d2/_temporary/$tfile.$i $d2/$tfile.$i &
+		done
+	done
+	wait || error "rename failed"
+
+	cleanup_81d
+	local stats=$DIR1/md_stats
+	local total=$((MDSCOUNT * COUNT))
+
+	do_nodes $mdts "$LCTL get_param -n mdt.*.md_stats" > $stats
+	cat $stats
+	crossdir=$(awk '/crossdir_rename/ {sum+=$2} END {print sum}' $stats)
+	(( crossdir == total )) ||
+		error "not crossdir: $crossdir != $total"
+	samedir=$(awk '/samedir_rename/ {sum+=$2} END {print sum}' $stats)
+	(( samedir == 0 )) || error "considered samedir: $samedir"
+	pardir=$(awk '/parallel_rename_dir/ {sum+=$2} END {print sum}' $stats)
+	(( pardir == 0 )) || error "considered directory: $pardir"
+
+
+	(( MDS1_VERSION >= $(version_code 2.15.60) )) ||
+		{ echo "need MDS >= 2.15.60 for parallel cross-dir"; return 0; }
+
+	parfile=$(awk '/parallel_rename_file/ {sum+=$2} END {print sum}' $stats)
+	(( parfile == total )) ||
+		error "not considered file: $parfile != $total"
+}
+run_test 81d "parallel rename file cross-dir on same MDT"
 
 test_82() {
-	[[ $(lustre_version_code $SINGLEMDS) -gt $(version_code 2.6.91) ]] ||
-		{ skip "Need MDS version at least 2.6.92"; return 0; }
+	[[ "$MDS1_VERSION" -gt $(version_code 2.6.91) ]] ||
+		skip "Need MDS version at least 2.6.92"
 
 	# Client 1 creates a file.
 	multiop_bg_pause $DIR1/$tfile O_ac || error "multiop_bg_pause 1"
@@ -4101,6 +5507,36 @@ test_83() {
 }
 run_test 83 "access striped directory while it is being created/unlinked"
 
+test_84() {
+	[ $MDS1_VERSION -lt $(version_code 2.12.55) ] &&
+		skip "lustre < 2.12.55 does not contain LU-12485 fix"
+
+	local mtime
+
+	$MULTIOP $DIR/$tfile oO_RDWR:O_CREAT:O_LOV_DELAY_CREATE:c ||
+		error "create $tfile failed"
+	mtime=$(stat -c%Y $DIR/$tfile)
+	mtime=$((mtime + 200))
+
+	#define OBD_FAIL_OBD_0NLINK_RACE  0x60b
+	do_facet mds1 $LCTL set_param fail_loc=0x8000060b
+
+	touch -c -m $mtime $DIR/$tfile &
+	setattr_pid=$!
+	# sleep a while to let 'touch' run first
+	sleep 5
+	rm -f $DIR2/$tfile || error "unlink $tfile failed"
+
+	# touch may fail
+	wait $setattr_pid || true
+}
+run_test 84 "0-nlink race in lu_object_find()"
+
+test_85() {
+	llapi_root_test $DIR/$tfile $DIR2/$tfile
+}
+run_test 85 "Lustre API root cache race"
+
 test_90() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
 	local pid1
@@ -4205,29 +5641,29 @@ test_93() {
 
 	mkdir -p $DIR1/$tfile-1/
 	mkdir -p $DIR2/$tfile-2/
-	local old_rr=$(do_facet $SINGLEMDS lctl get_param -n \
-		'lod.lustre-MDT*/qos_threshold_rr' | sed -e 's/%//')
-	do_facet $SINGLEMDS lctl set_param -n \
-		'lod.lustre-MDT*/qos_threshold_rr' 100
+	local old_rr=$(do_facet $SINGLEMDS "$LCTL get_param -n \
+		lod.$FSNAME-MDT0000-*/qos_threshold_rr" | sed -e 's/%//')
+	do_facet $SINGLEMDS "$LCTL set_param -n \
+		lod.$FSNAME-MDT0000-*/qos_threshold_rr=100"
 	#define OBD_FAIL_MDS_LOV_CREATE_RACE     0x163
-	do_facet $SINGLEMDS "lctl set_param fail_loc=0x00000163"
+	do_facet $SINGLEMDS "$LCTL set_param fail_loc=0x00000163"
 
-	$SETSTRIPE -c -1 $DIR1/$tfile-1/file1 &
+	$LFS setstripe -c -1 $DIR1/$tfile-1/file1 &
 	local PID1=$!
 	sleep 1
-	$SETSTRIPE -c -1 $DIR2/$tfile-2/file2 &
+	$LFS setstripe -c -1 $DIR2/$tfile-2/file2 &
 	local PID2=$!
 	wait $PID2
 	wait $PID1
-	do_facet $SINGLEMDS "lctl set_param fail_loc=0x0"
-	do_facet $SINGLEMDS "lctl set_param -n \
-		'lod.lustre-MDT*/qos_threshold_rr' $old_rr"
+	do_facet $SINGLEMDS "$LCTL set_param fail_loc=0x0"
+	do_facet $SINGLEMDS "$LCTL set_param -n \
+		lod.$FSNAME-MDT0000-*/qos_threshold_rr=$old_rr"
 
-	$GETSTRIPE $DIR1/$tfile-1/file1
-	rc1=$($GETSTRIPE -q $DIR1/$tfile-1/file1 |
+	$LFS getstripe $DIR1/$tfile-1/file1
+	rc1=$($LFS getstripe -q $DIR1/$tfile-1/file1 |
 		awk '{if (/[0-9]/) print $1 }' | sort | uniq -d | wc -l)
-	$GETSTRIPE $DIR2/$tfile-2/file2
-	rc2=$($GETSTRIPE -q $DIR2/$tfile-2/file2 |
+	$LFS getstripe $DIR2/$tfile-2/file2
+	rc2=$($LFS getstripe -q $DIR2/$tfile-2/file2 |
 		awk '{if (/[0-9]/) print $1 }' | sort | uniq -d | wc -l)
 	echo "rc1=$rc1 and rc2=$rc2 "
 	[ $rc1 -eq 0 ] && [ $rc2 -eq 0 ] ||
@@ -4235,11 +5671,110 @@ test_93() {
 }
 run_test 93 "alloc_rr should not allocate on same ost"
 
+test_94() {
+	$LCTL set_param osc.*.idle_timeout=0
+	dd if=/dev/zero of=$DIR2/$tfile bs=4k count=2 conv=fsync
+
+	local before=$(date +%s)
+	local evict
+
+	$LCTL mark write
+#define OBD_FAIL_LDLM_PAUSE_CANCEL       0x312
+	$LCTL set_param fail_val=5 fail_loc=0x80000312
+	dd if=/dev/zero of=$DIR/$tfile conv=notrunc oflag=append bs=4k count=1 &
+	local pid=$!
+	sleep 2
+
+#define OBD_FAIL_LDLM_PAUSE_CANCEL_LOCAL 0x329
+	$LCTL set_param fail_val=6 fail_loc=0x80000329
+	$LCTL mark kill $pid
+	kill -ALRM $pid
+
+	dd if=/dev/zero of=$DIR2/$tfile conv=notrunc oflag=append bs=4k count=1
+
+	wait $pid
+	dd if=/dev/zero of=$DIR/$tfile bs=4k count=1 conv=fsync
+
+	evict=$(do_facet client $LCTL get_param \
+		osc.$FSNAME-OST*-osc-*/state |
+	    awk -F"[ [,]" '/EVICTED ]$/ { if (t<$5) {t=$5;} } END { print t }')
+
+	[ -z "$evict" ] || [[ $evict -le $before ]] ||
+		(do_facet client $LCTL get_param \
+			osc.$FSNAME-OST*-osc-*/state;
+		    error "eviction happened: $evict before:$before")
+	$LCTL set_param osc.*.idle_timeout=debug
+}
+run_test 94 "signal vs CP callback race"
+
+test_95a() {
+	local file=$DIR/$tfile
+	local file2=$DIR2/$tfile
+	local fast_read_save
+	local pid
+
+	fast_read_save=$($LCTL get_param -n llite.*.fast_read | head -n 1)
+	[ -z "$fast_read_save" ] && skip "no fast read support"
+
+	stack_trap "$LCTL set_param llite.*.fast_read=$fast_read_save" EXIT
+	$LCTL set_param llite.*.fast_read=0
+
+	$LFS setstripe -c $OSTCOUNT $file || error "failed to setstripe $file"
+	dd if=/dev/zero of=$file bs=1M count=2 || error "failed to write $file"
+	cancel_lru_locks $OSC
+	$MULTIOP $file Oz1048576w4096c || error "failed to write $file"
+	$MULTIOP $file oz1044480r4096c || error "failed to read $file"
+
+	# OBD_FAIL_LLITE_PAGE_INVALIDATE_PAUSE	0x1421
+	$LCTL set_param fail_loc=0x80001421 fail_val=7
+	$MULTIOP $file2 Oz1048576w4096_c &
+	pid=$!
+
+	sleep 2
+	# OBD_FAIL_LLITE_READPAGE_PAUSE		0x1422
+	$LCTL set_param fail_loc=0x80001422 fail_val=10
+	$MULTIOP $file oz1044480r4096c || error "failed to read $file"
+
+	kill -USR1 $pid && wait $pid || error "wait for PID $pid failed"
+}
+run_test 95a "Check readpage() on a page that was removed from page cache"
+
+test_95b() {
+	local file=$DIR/$tfile
+	local file2=$DIR2/$tfile
+	local fast_read_save
+	local pid
+
+	fast_read_save=$($LCTL get_param -n llite.*.fast_read | head -n 1)
+	[ -z "$fast_read_save" ] && skip "no fast read support"
+
+	stack_trap "$LCTL set_param llite.*.fast_read=$fast_read_save" EXIT
+	$LCTL set_param llite.*.fast_read=0
+
+	$LFS setstripe -c $OSTCOUNT $file || error "failed to setstripe $file"
+	dd if=/dev/zero of=$file bs=$((PAGE_SIZE * 3)) count=1 ||
+		error "failed to write $file"
+
+	# This does the read from the second mount, so this flushes the pages
+	# the first mount and creates new ones on the second mount
+	# OBD_FAIL_LLITE_READPAGE_PAUSE2	0x1424
+	$LCTL set_param fail_loc=0x80001424 fail_val=5
+	$MULTIOP $file2 or${PAGE_SIZE}c &
+	pid=$!
+
+	sleep 2
+	fadvise_dontneed_helper $file2
+	$LCTL set_param fail_loc=0
+	sleep 4
+	wait $pid || error "failed to read file"
+}
+run_test 95b "Check readpage() on a page that is no longer uptodate"
+
 # Data-on-MDT tests
 test_100a() {
 	skip "Reserved for glimpse-ahead" && return
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	mkdir -p $DIR/$tdir
 
@@ -4250,21 +5785,20 @@ test_100a() {
 
 	$CHECKSTAT -t file -s 4096 $DIR/$tdir/dom || error "stat #1"
 	# first stat from server should return size data and save glimpse
-	local gls=$(lctl get_param -n mdc.*.stats | \
-		awk '/ldlm_glimpse/ {print $2}')
-	[ -z $gls ] || error "Unexpected $gls glimpse RPCs"
+	local gls=$(lctl get_param -n mdc.*.stats | grep -c ldlm_glimpse)
+	[ $gls -eq 0 ] || error "Unexpected $gls glimpse RPCs"
 	# second stat to check size is NOT cached on client without IO lock
 	$CHECKSTAT -t file -s 4096 $DIR/$tdir/dom || error "stat #2"
 
-	local gls=$(lctl get_param -n mdc.*.stats | grep ldlm_glimpse | wc -l)
-	[ "1" == "$gls" ] || error "Expect 1 glimpse RPCs but got $gls"
+	local gls=$(lctl get_param -n mdc.*.stats | grep -c ldlm_glimpse)
+	[ $gls -ge 1 ] || error "Expect glimpse RPCs but none"
 	rm -f $dom
 }
 run_test 100a "DoM: glimpse RPCs for stat without IO lock (DoM only file)"
 
 test_100b() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	mkdir -p $DIR/$tdir
 
@@ -4278,17 +5812,16 @@ test_100b() {
 	# second stat to check size is cached on client
 	$CHECKSTAT -t file -s 4096 $DIR/$tdir/dom || error "stat #2"
 
-	local gls=$(lctl get_param -n mdc.*.stats |
-			awk '/ldlm_glimpse/ {print $2}')
+	local gls=$(lctl get_param -n mdc.*.stats | grep -c ldlm_glimpse)
 	# both stats should cause no glimpse requests
-	[ -z $gls ] || error "Unexpected $gls glimpse RPCs"
+	[ $gls == 0 ] || error "Unexpected $gls glimpse RPCs"
 	rm -f $dom
 }
 run_test 100b "DoM: no glimpse RPC for stat with IO lock (DoM only file)"
 
 test_100c() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	mkdir -p $DIR/$tdir
 
@@ -4302,7 +5835,7 @@ test_100c() {
 	$CHECKSTAT -t file -s 2097152 $DIR/$tdir/dom ||
 		error "Wrong size from stat #1"
 
-	local gls=$(lctl get_param -n osc.*.stats | grep ldlm_glimpse | wc -l)
+	local gls=$(lctl get_param -n osc.*.stats | grep -c ldlm_glimpse)
 	[ $gls -eq 0 ] && error "Expect OST glimpse RPCs but got none"
 
 	rm -f $dom
@@ -4310,8 +5843,8 @@ test_100c() {
 run_test 100c "DoM: write vs stat without IO lock (combined file)"
 
 test_100d() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	mkdir -p $DIR/$tdir
 
@@ -4327,91 +5860,886 @@ test_100d() {
 	$CHECKSTAT -t file -s 4096 $DIR/$tdir/dom ||
 		error "Wrong size from stat #1"
 
-	local gls=$(lctl get_param -n osc.*.stats | grep ldlm_glimpse | wc -l)
+	local gls=$(lctl get_param -n osc.*.stats | grep -c ldlm_glimpse)
 	[ $gls -eq 0 ] && error "Expect OST glimpse but got none"
 
 	rm -f $dom
 }
 run_test 100d "DoM: write+truncate vs stat without IO lock (combined file)"
 
+test_100e() {
+	[ "$MDS1_VERSION" -lt $(version_code 2.11.50) ] &&
+		skip "Need MDS version at least 2.11.50"
+
+	local dom=$DIR/$tdir/dom
+	local dom2=$DIR2/$tdir/dom
+	mkdir -p $DIR/$tdir
+
+	$LFS setstripe -E 1024K -L mdt $DIR/$tdir
+
+	cancel_lru_locks mdc
+	dd if=/dev/urandom of=$dom bs=12000 count=1
+	$TRUNCATE $dom2 6000
+	cancel_lru_locks mdc
+	lctl set_param -n mdc.*.stats=clear
+	# expect read-on-open to return all data before write
+	cat /etc/hosts >> $dom
+	local read=$(lctl get_param -n mdc.*.stats | grep -c ost_read)
+	[[ $read -eq 0 ]] || error "Unexpected $read READ RPCs"
+}
+run_test 100e "DoM: read on open and file size"
+
 test_101a() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	$LFS setstripe -E 1024K -L mdt -E EOF $DIR1/$tfile
 	# to get layout
 	$CHECKSTAT -t file $DIR1/$tfile
 
-	OLD_VAL=$(cat /proc/sys/vm/dirty_writeback_centisecs)
-	echo 0 > /proc/sys/vm/dirty_writeback_centisecs
-	echo $OLD_VAL
+	local old_wb=$(sysctl -n vm.dirty_writeback_centisecs)
+	sysctl -wq vm.dirty_writeback_centisecs=0
+
+	trap "sysctl -wq vm.dirty_writeback_centisecs=$old_wb" EXIT
 
 	# open + IO lock
 	dd if=/dev/zero of=$DIR1/$tfile bs=4096 count=1 ||
 		error_noexit "Write fails"
 	# must discard pages
 	lctl set_param -n mdc.*.stats=clear
-	rm $DIR2/$tfile || error_noexit "Unlink fails"
-	local writes=$(lctl get_param -n mdc.*.stats | grep ost_write | wc -l)
-	echo $OLD_VAL > /proc/sys/vm/dirty_writeback_centisecs
+	rm $DIR2/$tfile || error "Unlink fails"
 
+	local writes=$(lctl get_param -n mdc.*.stats | grep -c ost_write)
 	[ $writes -eq 0 ] || error "Found WRITE RPC but expect none"
 }
 run_test 101a "Discard DoM data on unlink"
 
 test_101b() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	$LFS setstripe -E 1024K -L mdt -E EOF $DIR1/$tfile
 	touch $DIR1/${tfile}_2
 	# to get layout
 	$CHECKSTAT -t file $DIR1/$tfile
 
-	OLD_VAL=$(cat /proc/sys/vm/dirty_writeback_centisecs)
-	echo 0 > /proc/sys/vm/dirty_writeback_centisecs
-	echo $OLD_VAL
+	local old_wb=$(sysctl -n vm.dirty_writeback_centisecs)
+	sysctl -wq vm.dirty_writeback_centisecs=0
+
+	trap "sysctl -wq vm.dirty_writeback_centisecs=$old_wb" EXIT
 
 	# open + IO lock
-	dd if=/dev/zero of=$DIR1/$tfile bs=4096 count=1 ||
-		error_noexit "Write fails"
+	dd if=/dev/zero of=$DIR1/$tfile bs=4096 count=1 || error "Write fails"
 	# must discard pages
 	lctl set_param -n mdc.*.stats=clear
-	mv $DIR2/${tfile}_2 $DIR2/$tfile || error_noexit "Rename fails"
-	local writes=$(lctl get_param -n mdc.*.stats | grep ost_write | wc -l)
-	echo $OLD_VAL > /proc/sys/vm/dirty_writeback_centisecs
+	mv $DIR2/${tfile}_2 $DIR2/$tfile || error "Rename fails"
+
+	local writes=$(lctl get_param -n mdc.*.stats | grep -c ost_write)
 	[ $writes -eq 0 ] || error "Found WRITE RPC but expect none"
 }
 run_test 101b "Discard DoM data on rename"
 
 test_101c() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	$LFS setstripe -E 1024K -L mdt -E EOF $DIR1/$tfile
 	# to get layout
 	$CHECKSTAT -t file $DIR1/$tfile
 
-	OLD_VAL=$(cat /proc/sys/vm/dirty_writeback_centisecs)
-	echo 0 > /proc/sys/vm/dirty_writeback_centisecs
-	echo $OLD_VAL
+	local old_wb=$(sysctl -n vm.dirty_writeback_centisecs)
+	sysctl -wq vm.dirty_writeback_centisecs=0
+
+	trap "sysctl -wq vm.dirty_writeback_centisecs=$old_wb" EXIT
 
 	# open + IO lock
-	dd if=/dev/zero of=$DIR1/$tfile bs=4096 count=1 ||
-		error_noexit "Write fails"
+	dd if=/dev/zero of=$DIR1/$tfile bs=4096 count=1 || error "Write fails"
 	$MULTIOP $DIR1/$tfile O_c &
 	MULTIOP_PID=$!
 	sleep 1
 	lctl set_param -n mdc.*.stats=clear
-	rm $DIR2/$tfile > /dev/null || error_noexit "Unlink fails"
-	kill -USR1 $MULTIOP_PID && wait $MULTIOP_PID ||
-		error_noexit "multiop failure"
-	local writes=$(lctl get_param -n mdc.*.stats | grep ost_write | wc -l)
-	echo $OLD_VAL > /proc/sys/vm/dirty_writeback_centisecs
+	rm $DIR2/$tfile > /dev/null || error "Unlink fails for opened file"
+	kill -USR1 $MULTIOP_PID && wait $MULTIOP_PID || error "multiop failure"
+
+	local writes=$(lctl get_param -n mdc.*.stats | grep -c ost_write)
 	[ $writes -eq 0 ] || error "Found WRITE RPC but expect none"
 }
 run_test 101c "Discard DoM data on close-unlink"
 
+# test to verify file handle related system calls
+# (name_to_handle_at/open_by_handle_at)
+# The new system calls are supported in glibc >= 2.14.
+
+# test to verify we can open by handle an unlinked file from > 1 client
+# This test opens the file normally on $DIR1, which is on one mount, and then
+# opens it by handle on $DIR2, which is on a different mount.
+test_102() {
+	(( "$MDS1_VERSION" >= $(version_code 2.11.57) )) ||
+		skip "Needs MDS version 2.11.57 or later"
+
+	echo "Test file_handle syscalls" > $DIR/$tfile ||
+		error "write failed"
+	check_fhandle_syscalls $DIR/$tfile $DIR2 ||
+		error "check_fhandle_syscalls $tfile failed"
+
+	# test this is working on DNE directories also
+	if (( MDSCOUNT > 1 && MDS1_VERSION >= $(version_code 2.14.52) )); then
+		$LFS mkdir -i 1 $DIR/$tdir.remote
+		cancel_lru_locks mdc
+		check_fhandle_syscalls $DIR/$tdir.remote $DIR2 ||
+			error "check_fhandle_syscalls $tdir.remote failed"
+		$LFS mkdir -c -1 $DIR/$tdir.remote/subdir
+		cancel_lru_locks mdc
+		check_fhandle_syscalls $DIR/$tdir.remote/subdir $DIR2 ||
+			error "check_fhandle_syscalls $tdir.remote/subdir fail"
+
+		$LFS mkdir -c -1 $DIR/$tdir.stripe
+		cancel_lru_locks mdc
+		check_fhandle_syscalls $DIR/$tdir.stripe $DIR2 ||
+			error "check_fhandle_syscalls $tdir.stripe failed"
+		$LFS mkdir -c -1 $DIR/$tdir.stripe/subdir
+		cancel_lru_locks mdc
+		check_fhandle_syscalls $DIR/$tdir.stripe/subdir $DIR2 ||
+			error "check_fhandle_syscalls $tdir.stripe/subdir fail"
+	fi
+}
+run_test 102 "Test open by handle of unlinked file"
+
+# Compare file size between first & second mount, ensuring the client correctly
+# glimpses even with unused speculative locks - LU-11670
+test_103() {
+	[ $OST1_VERSION -lt $(version_code 2.10.50) ] &&
+		skip "Lockahead needs OST version at least 2.10.50"
+
+	local locktest=23
+
+	test_mkdir -p $DIR/$tdir
+
+	# Force file on to OST0
+	$LFS setstripe -i 0 $DIR/$tdir
+
+	# Do not check multiple locks on glimpse
+	# OBD_FAIL_OSC_NO_SIZE_DATA 0x415
+	$LCTL set_param fail_loc=0x415
+
+	# Delay write commit by 2 seconds to guarantee glimpse wins race
+	# The same fail_loc is used on client & server so it can work in the
+	# single node sanity setup
+	do_facet ost1 $LCTL set_param fail_loc=0x415 fail_val=2
+
+	echo "Incorrect size expected (no glimpse fix):"
+	lockahead_test -d $DIR/$tdir -D $DIR2/$tdir -t $locktest -f $tfile
+	rc=$?
+	if [ $rc -eq 0 ]; then
+		echo "This doesn't work 100%, but this is just reproducing the bug, not testing the fix, so OK to not fail test."
+	fi
+
+	# guarantee write commit timeout has expired
+	sleep 2
+
+	# Clear fail_loc on client
+	$LCTL set_param fail_loc=0
+
+	# Delay write commit by 2 seconds to guarantee glimpse wins race
+	# OBD_FAIL_OST_BRW_PAUSE_BULK 0x214
+	do_facet ost1 $LCTL set_param fail_loc=0x214 fail_val=2
+
+	# Write commit is still delayed by 2 seconds
+	lockahead_test -d $DIR/$tdir -D $DIR2/$tdir -t $locktest -f $tfile
+	rc=$?
+	[ $rc -eq 0 ] || error "Lockahead test$locktest failed, $rc"
+
+	# guarantee write commit timeout has expired
+	sleep 2
+
+	rm -f $DIR/$tfile || error "unable to delete $DIR/$tfile"
+}
+run_test 103 "Test size correctness with lockahead"
+
+get_stat_xtimes()
+{
+	local xtimes
+
+	xtimes=$(stat -c "%X %Y %Z" $DIR/$tfile)
+
+	echo ${xtimes[*]}
+}
+
+get_mdt_xtimes()
+{
+	local mdtdev=$1
+	local output
+	local xtimes
+
+	output=$(do_facet mds1 "$DEBUGFS -c -R 'stat ROOT/$tfile' $mdtdev")
+	((xtimes[0]=$(awk -F ':' /atime/'{ print $2 }' <<< "$output")))
+	((xtimes[1]=$(awk -F ':' /mtime/'{ print $2 }' <<< "$output")))
+	((xtimes[2]=$(awk -F ':' /ctime/'{ print $2 }' <<< "$output")))
+
+	echo ${xtimes[*]}
+}
+
+check_mdt_xtimes()
+{
+	local mdtdev=$1
+	local xtimes=($(get_stat_xtimes))
+	local mdt_xtimes=($(get_mdt_xtimes $mdtdev))
+
+	echo "STAT a|m|ctime ${xtimes[*]}"
+	echo "MDT a|m|ctime ${mdt_xtimes[*]}"
+	[[ ${xtimes[0]} == ${mdt_xtimes[0]} ]] ||
+		error "$DIR/$tfile atime (${xtimes[0]}:${mdt_xtimes[0]}) diff"
+	[[ ${xtimes[1]} == ${mdt_xtimes[1]} ]] ||
+		error "$DIR/$tfile mtime (${xtimes[1]}:${mdt_xtimes[1]}) diff"
+	[[ ${xtimes[2]} == ${mdt_xtimes[2]} ]] ||
+		error "$DIR/$tfile ctime (${xtimes[2]}:${mdt_xtimes[2]}) diff"
+}
+
+test_104() {
+	[ "$mds1_FSTYPE" == "ldiskfs" ] || skip_env "ldiskfs only test"
+	[ $MDS1_VERSION -lt $(version_code 2.12.4) ] &&
+		skip "Need MDS version at least 2.12.4"
+
+	local pid
+	local mdtdev=$(mdsdevname ${SINGLEMDS//mds/})
+	local atime_diff=$(do_facet $SINGLEMDS \
+		lctl get_param -n mdd.*MDT0000*.atime_diff)
+
+	do_facet $SINGLEMDS \
+		lctl set_param -n mdd.*MDT0000*.atime_diff=0
+
+	stack_trap "do_facet $SINGLEMDS \
+		lctl set_param -n mdd.*MDT0000*.atime_diff=$atime_diff" EXIT
+
+	dd if=/dev/zero of=$DIR/$tfile bs=1k count=1 conv=notrunc
+	check_mdt_xtimes $mdtdev
+	sleep 2
+
+	dd if=/dev/zero of=$DIR/$tfile bs=1k count=1 conv=notrunc
+	check_mdt_xtimes $mdtdev
+	sleep 2
+	$MULTIOP $DIR2/$tfile Oz8192w8192_c &
+	pid=$!
+	sleep 2
+	dd if=/dev/zero of=$DIR/$tfile bs=1k count=1 conv=notrunc
+	sleep 2
+	kill -USR1 $pid && wait $pid || error "multiop failure"
+	check_mdt_xtimes $mdtdev
+
+	local xtimes
+	local mdt_xtimes
+
+	# Verify mtime/ctime is NOT upated on MDS when there is no modification
+	# on the client side
+	xtimes=($(get_stat_xtimes))
+	$MULTIOP $DIR/$tfile O_c &
+	pid=$!
+	sleep 2
+	kill -USR1 $pid && wait $pid || error "multiop failure"
+	mdt_xtimes=($(get_mdt_xtimes $mdtdev))
+	[[ ${xtimes[1]} == ${mdt_xtimes[1]} ]] ||
+		error "$DIR/$tfile mtime (${xtimes[1]}:${mdt_xtimes[1]}) diff"
+	[[ ${xtimes[2]} == ${mdt_xtimes[2]} ]] ||
+		error "$DIR/$tfile ctime (${xtimes[2]}:${mdt_xtimes[2]}) diff"
+	check_mdt_xtimes $mdtdev
+
+	sleep 2
+	# Change ctime via chmod
+	$MULTIOP $DIR/$tfile o_tc &
+	pid=$!
+	sleep 2
+	kill -USR1 $pid && wait $pid || error "multiop failure"
+	check_mdt_xtimes $mdtdev
+}
+run_test 104 "Verify that MDS stores atime/mtime/ctime during close"
+
+test_105() {
+	test_mkdir -p $DIR/$tdir
+	echo test > $DIR/$tdir/$tfile
+	$LCTL set_param fail_loc=0x416
+	cancel_lru_locks osc & sleep 1
+	fsize1=$(stat -c %s $DIR2/$tdir/$tfile)
+	wait
+	[[ $fsize1 = 5 ]] ||  error "Glimpse returned wrong file size $fsize1"
+}
+run_test 105 "Glimpse and lock cancel race"
+
+test_106a() {
+	[ "$mds1_FSTYPE" == "ldiskfs" ] && statx_supported ||
+		skip_env "Test only for ldiskfs and statx() supported"
+
+	local btime
+	local mdt_btime
+	local output
+	local mdtdev=$(mdsdevname ${SINGLEMDS//mds/})
+
+	dd if=/dev/zero of=$DIR/$tfile bs=1k count=1 conv=notrunc
+	btime=$($STATX -c %W $DIR/$tfile)
+	output=$(do_facet mds1 "$DEBUGFS -c -R 'stat ROOT/$tfile' $mdtdev")
+	echo $output
+	((mdt_btime=$(awk -F ':' /crtime/'{ print $2 }' <<< "$output")))
+	[[ $btime == $mdt_btime ]] ||
+		error "$DIR/$tfile btime ($btime:$mdt_btime) diff"
+
+}
+run_test 106a "Verify the btime via statx()"
+
+test_106b() {
+	statx_supported || skip_env "statx() only test"
+
+	local rpcs_before
+	local rpcs_after
+
+	$LFS setstripe -c 1 $DIR/$tfile || error "$DIR/$tfile setstripe failed"
+	dd if=/dev/zero of=$DIR/$tfile bs=1k count=1 conv=notrunc
+	cancel_lru_locks $OSC
+	rpcs_before=$(calc_stats $OSC.*$OSC*.stats ldlm_glimpse_enqueue)
+	$STATX $DIR/$tfile
+	rpcs_after=$(calc_stats $OSC.*$OSC*.stats ldlm_glimpse_enqueue)
+	[ $rpcs_after -eq $((rpcs_before + 1)) ] ||
+		error "$STATX should send 1 glimpse RPC to $OSC"
+
+	cancel_lru_locks $OSC
+	rpcs_before=$(calc_stats $OSC.*$OSC*.stats ldlm_glimpse_enqueue)
+	# %n: FILENAME; %i: STATX_INO; %A STATX_MODE; %h STATX_NLINK;
+	# %u: STATX_UID; %g: STATX_GID; %W STATX_BTIME; %X STATX_ATIME;
+	# %Z: STATX_CTIME
+	$STATX -c "%n %i %A %h %u %g %W %X %Z" $DIR/$tfile
+	rpcs_after=$(calc_stats $OSC.*$OSC*.stats ldlm_glimpse_enqueue)
+	[ $rpcs_after -eq $rpcs_before ] ||
+		error "$STATX should not send glimpse RPCs to $OSC"
+
+	cancel_lru_locks $OSC
+	rpcs_before=$(calc_stats $OSC.*$OSC*.stats ldlm_glimpse_enqueue)
+	$STATX --cached=always $DIR/$tfile
+	rpcs_after=$(calc_stats $OSC.*$OSC*.stats ldlm_glimpse_enqueue)
+	[ $rpcs_after -eq $rpcs_before ] ||
+		error "$STATX should not send glimpse RPCs to $OSC"
+
+	cancel_lru_locks $OSC
+	rpcs_before=$(calc_stats $OSC.*$OSC*.stats ldlm_glimpse_enqueue)
+	$STATX -c %Y $DIR/$tfile
+	rpcs_after=$(calc_stats $OSC.*$OSC*.stats ldlm_glimpse_enqueue)
+	[ $rpcs_after -eq $((rpcs_before + 1)) ] ||
+		error "$STATX -c %Y should send 1 glimpse RPC to $OSC"
+
+	cancel_lru_locks $OSC
+	rpcs_before=$(calc_stats $OSC.*$OSC*.stats ldlm_glimpse_enqueue)
+	$STATX -c %s $DIR/$tfile
+	rpcs_after=$(calc_stats $OSC.*$OSC*.stats ldlm_glimpse_enqueue)
+	[ $rpcs_after -eq $((rpcs_before + 1)) ] ||
+		error "$STATX -c %s should send 1 glimpse RPC to $OSC"
+
+	cancel_lru_locks $OSC
+	rpcs_before=$(calc_stats $OSC.*$OSC*.stats ldlm_glimpse_enqueue)
+	$STATX -c %b $DIR/$tfile
+	rpcs_after=$(calc_stats $OSC.*$OSC*.stats ldlm_glimpse_enqueue)
+	[ $rpcs_after -eq $((rpcs_before + 1)) ] ||
+		error "$STATX -c %b should send 1 glimpse RPC to $OSC"
+}
+run_test 106b "Glimpse RPCs test for statx"
+
+test_106c() {
+	statx_supported || skip_env "statx() only test"
+
+	local mask
+
+	touch $DIR/$tfile
+	# Mask supported in stx_attributes by Lustre is
+	# STATX_ATTR_IMMUTABLE(0x10) | STATX_ATTR_APPEND(0x20) : (0x30).
+	mask=$($STATX -c %p $DIR/$tfile)
+	(( (0x$mask & 0x30) == 0x30 )) ||
+		error "supported stx_attributes: got '0x$mask', expected '0x30' at least"
+	chattr +i $DIR/$tfile || error "chattr +i $DIR/$tfile failed"
+	mask=$($STATX -c %r $DIR/$tfile)
+	[[ $mask == "10" ]] ||
+		error "got immutable flags '$mask', expected '10'"
+	chattr -i $DIR/$tfile || error "chattr -i $DIR/$tfile failed"
+	mask=$($STATX -c %r $DIR/$tfile)
+	[[ $mask == "0" ]] || error "got flags '$mask', expected '0'"
+	chattr +a $DIR/$tfile || error "chattr +a $DIR/$tfile failed"
+	mask=$($STATX -c %r $DIR/$tfile)
+	[[ $mask == "20" ]] || error "got flags '$mask', expected '20'"
+	chattr -a $DIR/$tfile || error "chattr -a $DIR/$tfile failed"
+	mask=$($STATX -c %r $DIR/$tfile)
+	[[ $mask == "0" ]] || error "got flags '$mask', expected '0'"
+	chattr +ia $DIR/$tfile || error "chattr +ia $DIR/$tfile failed"
+	mask=$($STATX -c %r $DIR/$tfile)
+	[[ $mask == "30" ]] || error "got flags '$mask', expected '30'"
+	chattr -ia $DIR/$tfile || error "chattr -ia $DIR/$tfile failed"
+	mask=$($STATX -c %r $DIR/$tfile)
+	[[ $mask == "0" ]] || error "got flags '$mask', expected '0'"
+}
+run_test 106c "Verify statx attributes mask"
+
+test_107a() { # LU-1031
+	dd if=/dev/zero of=$DIR1/$tfile bs=1M count=10
+	local gid1=14091995
+	local gid2=16022000
+
+	$LFS getstripe $DIR1/$tfile
+
+	multiop_bg_pause $DIR1/$tfile OG${gid1}_g${gid1}c || return 1
+	local MULTIPID1=$!
+	multiop_bg_pause $DIR2/$tfile O_G${gid2}r10g${gid2}c || return 2
+	local MULTIPID2=$!
+	kill -USR1 $MULTIPID2
+	sleep 2
+	if [[ $(ps h -o comm -p $MULTIPID2) == "" ]]; then
+		error "First grouplock does not block second one"
+	else
+		echo "First grouplock blocks second one"
+	fi
+	kill -USR1 $MULTIPID1
+	wait $MULTIPID1
+	wait $MULTIPID2
+}
+run_test 107a "Basic grouplock conflict"
+
+test_107b() {
+	dd if=/dev/zero of=$DIR1/$tfile bs=1M count=10
+	local gid1=14091995
+	local gid2=16022000
+
+	$LFS getstripe $DIR1/$tfile
+
+	multiop_bg_pause $DIR1/$tfile OG${gid1}_g${gid1}c || return 1
+	local MULTIPID1=$!
+	multiop $DIR2/$tfile Or10c &
+	local MULTIPID2=$!
+	sleep 2
+
+	if [[ $(ps h -o comm -p $MULTIPID2) == "" ]]; then
+		error "Grouplock does not block IO"
+	else
+		echo "Grouplock blocks IO"
+	fi
+
+	multiop $DIR2/$tfile OG${gid2}_g${gid2}c &
+	local MULTIPID3=$!
+	sleep 2
+	if [[ $(ps h -o comm -p $MULTIPID3) == "" ]]; then
+		error "First grouplock does not block second one"
+	else
+		echo "First grouplock blocks second one"
+	fi
+
+	kill -USR1 $MULTIPID1
+	sleep 2
+
+	if [[ $(ps h -o comm -p $MULTIPID3) == "" ]]; then
+		error "Second grouplock thread disappeared"
+	fi
+
+	if [[ $(ps h -o comm -p $MULTIPID2) == "" ]]; then
+		error "Second grouplock does not block IO"
+	else
+		echo "Second grouplock blocks IO"
+	fi
+
+	kill -USR1 $MULTIPID3
+	wait $MULTIPID1
+	wait $MULTIPID2
+	wait $MULTIPID3
+}
+run_test 107b "Grouplock is added to the head of waiting list"
+
+test_108a() {
+	local offset
+
+	$LFS setstripe -E 1M -c 1 -E -1 $DIR1/$tfile ||
+		error "Create $DIR1/$tfile failed"
+
+	dd if=/dev/zero of=$DIR1/$tfile bs=10000 count=1 ||
+		error "dd $DIR1/$tfile failed"
+	offset=$(lseek_test -d 5000 $DIR2/$tfile)
+	[[ $offset == 5000 ]] || error "offset $offset != 5000"
+
+	$TRUNCATE $DIR1/$tfile 2000
+	offset=$(lseek_test -l 1000 $DIR2/$tfile)
+	[[ $offset == 2000 ]] || error "offset $offset != 2000"
+
+	#define OBD_FAIL_OSC_DELAY_IO 0x414
+	$LCTL set_param fail_val=4 fail_loc=0x80000414
+	dd if=/dev/zero of=$DIR1/$tfile count=1 bs=8M conv=notrunc oflag=dsync &
+	local pid=$!
+	sleep 2
+
+	offset=$(lseek_test -l 8000 $DIR2/$tfile)
+	wait $pid
+	[[ $offset == 8388608 ]] || error "offset $offset != 8388608"
+}
+run_test 108a "lseek: parallel updates"
+
+# LU-14110
+test_109() {
+	local i
+	local pid1 pid2
+
+	! local_mode ||
+		skip "Clients need to be on different nodes than the servers"
+
+	umount_client $MOUNT
+	umount_client $MOUNT2
+
+	echo "Starting race between client mount instances (50 iterations):"
+	for i in {1..50}; do
+		log "Iteration $i"
+
+#define CFS_FAIL_ONCE|OBD_FAIL_LLITE_RACE_MOUNT        0x80001417
+		$LCTL set_param -n fail_loc=0x80001417
+
+		mount_client $MOUNT  & pid1=$!
+		mount_client $MOUNT2 & pid2=$!
+		wait $pid1 || error "Mount $MOUNT fails with $?"
+		wait $pid2 || error "Mount $MOUNT2 fails with $?"
+
+		umount_client $MOUNT  & pid1=$!
+		umount_client $MOUNT2 & pid2=$!
+		wait $pid1 || error "Umount $MOUNT fails with $?"
+		wait $pid2 || error "Umount $MOUNT2 fails with $?"
+
+		$LUSTRE_RMMOD || error "Fail to remove lustre modules"
+		load_modules
+		echo
+	done
+
+	mount_client $MOUNT
+	mount_client $MOUNT2
+}
+
+run_test 109 "Race with several mount instances on 1 node"
+
+test_110() {
+	local before=$(date +%s)
+	local evict
+
+	mkdir -p $DIR/$tdir
+	touch $DIR/$tdir/f1
+	touch $DIR/$tfile
+
+	#define OBD_FAIL_PTLRPC_RESEND_RACE	 0x525
+	do_facet mds1 lctl set_param fail_loc=0x525 fail_val=3
+
+	# disable last_xid logic by dropping link reply
+	ln $DIR/$tdir/f1 $DIR/$tdir/f2 &
+	sleep 1
+
+	#define OBD_FAIL_PTLRPC_ENQ_RESEND	0x534
+	do_facet mds1 lctl set_param fail_loc=0x534
+
+	# RPC will race with its Resend and the Resend will sleep to let
+	# the original lock to get granted & cancelled.
+	#
+	# AST_SENT is set artificially, so an explicit conflict is not needed
+	#
+	# The woken up Resend gets a new lock, but client does not wait for it
+	stat $DIR/$tfile
+	sleep $TIMEOUT
+	do_facet mds1 lctl set_param fail_loc=0 fail_val=0
+
+	# Take a conflict to wait long enough to see the eviction
+	touch $DIR2/$tfile
+
+	# let the client reconnect
+	client_reconnect
+	evict=$(do_facet client $LCTL get_param mdc.$FSNAME-MDT*.state |
+	  awk -F"[ [,]" '/EVICTED ]$/ { if (mx<$5) {mx=$5;} } END { print mx }')
+
+	[ -z "$evict" ] || [[ $evict -le $before ]] ||
+		(do_facet client $LCTL get_param mdc.$FSNAME-MDT*.state;
+		    error "eviction happened: $evict before:$before")
+}
+run_test 110 "do not grant another lock on resend"
+
+test_111() {
+	[ $MDSCOUNT -ge 2 ] || skip "needs >= 2 MDTs"
+	[[ $(facet_active_host mds1) = $(facet_active_host mds2) ]] ||
+		skip "MDT0 and MDT1 should be on the same node"
+
+	mkdir $DIR1/$tdir
+	$LFS mkdir -i 0 $DIR1/$tdir/mdt0dir
+	$LFS mkdir -i 1 $DIR1/$tdir/mdt1dir
+
+	mkdir $DIR1/$tdir/mdt0dir/foodir
+	touch $DIR1/$tdir/mdt0dir/foodir/{file1,file2}
+
+	$MULTIOP $DIR2/$tdir/mdt0dir/foodir/file2 Ow4096_c &
+	MULTIOP_PID=$!
+	ln $DIR1/$tdir/mdt0dir/foodir/file2 $DIR1/$tdir/mdt1dir/file2
+
+	#define OBD_FAIL_MDS_LINK_RENAME_RACE   0x18a
+	do_facet mds1 $LCTL set_param fail_loc=0x8000018a
+
+	ln $DIR1/$tdir/mdt0dir/foodir/file2 $DIR1/$tdir/mdt1dir/file2x &
+	sleep 1
+
+	rm $DIR2/$tdir/mdt1dir/file2
+	sleep 1
+
+	mv $DIR2/$tdir/mdt0dir/foodir/file1 $DIR2/$tdir/mdt0dir/foodir/file2
+	sleep 1
+
+	kill $MULTIOP_PID
+	wait
+	rm -r $DIR1/$tdir || error "Removing test dir failed"
+}
+run_test 111 "A racy rename/link an open file should not cause fs corruption"
+
+test_112() {
+	(( MDSCOUNT >= 2 )) ||
+		skip "We need at least 2 MDTs for this test"
+
+	(( MDS1_VERSION >= $(version_code 2.14.54) )) ||
+		skip "Need server version at least 2.14.54"
+
+	local rr
+	local count
+
+	rr=$($LCTL get_param -n lmv.*.qos_threshold_rr | head -n1)
+	rr=${rr%%%}
+	stack_trap "$LCTL set_param lmv.*.qos_threshold_rr=$rr > /dev/null"
+
+	mkdir -p $DIR1/$tdir/s1/s2 || error "mkdir s2 failed"
+	$LFS mkdir -i 0 $DIR1/$tdir/s1/s2/s3 || error "mkdir s3 failed"
+	$LFS setdirstripe -D -i -1 --max-inherit-rr=0 $DIR1/$tdir/s1/s2/s3 ||
+		error "setdirstripe s3 failed"
+	$LCTL set_param lmv.*.qos_threshold_rr=90
+	mkdir $DIR2/$tdir/s1/s2/s3/d{1..64}
+	count=$($LFS getstripe -m $DIR2/$tdir/s1/s2/s3/d* | grep ^0 | wc -l)
+	(( count == 64 )) || error "only $count subdirs created on MDT0"
+
+	$LFS setdirstripe -D -i -1 --max-inherit-rr=3 $DIR1/$tdir/s1/s2/s3 ||
+		error "setdirstripe s3 failed"
+	mkdir $DIR2/$tdir/s1/s2/s3/s{1..64}
+	count=$($LFS getstripe -m $DIR2/$tdir/s1/s2/s3/s* | grep ^0 | wc -l)
+	(( count == 64 / MDSCOUNT )) || error "$count subdirs created on MDT0"
+}
+run_test 112 "update max-inherit in default LMV"
+
+test_113 () {
+	(( MDS1_VERSION >= $(version_code 2.15.50) )) ||
+		skip "Need server version at least 2.15.50"
+
+	local instance
+	local nid
+
+	instance=$($LFS getname -i $DIR1) ||
+		error "cannot get instance of $DIR1"
+
+	$LFS check osts $DIR1 | grep $instance ||
+		error "cannot find OSTs of instance $instance"
+
+	$LFS check osts $DIR1 | grep -v $instance
+	if (( $? == 0 )); then
+		error "find OSTs other than instance $instance"
+	fi
+
+	$LFS check osts | grep $instance ||
+		error "cannot find other OSTs"
+
+	nid=$(df $DIR2 | tail -1 | sed 's%:/.*%%') ||
+		error "cannot parse nid for $DIR2"
+
+	$LFS check mgts $DIR2 | grep MGC$nid ||
+		error "cannot find mgc of $nid"
+
+	$LFS check mgts $DIR2 | grep -v MGC$nid
+	if (( $? == 0 )); then
+		error "find MGTs other than nid $nid"
+	fi
+}
+run_test 113 "check servers of specified fs"
+
+check_default_lmv() {
+	local dir=$1
+
+	local enabled
+	local dmv
+	local index
+	local count
+	local inherit
+	local inherit_rr
+	local raw
+
+	enabled=$(do_facet mds1 \
+		$LCTL get_param -n mdt.*-MDT0000*.enable_dmv_implicit_inherit)
+
+	dmv=$($LFS getdirstripe -D $dir)
+	echo $dir $dmv
+	index=$(echo $dmv | awk '{ print $4 }')
+	(( index == $2 )) || error "$dir default stripe index $index != $2"
+
+	count=$(echo $dmv | awk '{ print $2 }')
+	(( count == $3 )) || error "$dir default stripe count $count != $3"
+
+	inherit=$(echo $dmv | awk '{ print $8 }')
+	(( inherit == $4 )) || error "$dir default max-inherit $inherit != $4"
+
+	if [ $index -eq -1 ]; then
+		inherit_rr=$(echo $dmv | awk '{ print $10 }')
+		(( inherit_rr == $5 )) ||
+			error "$dir default max-inherit-rr $inherit_rr != $5"
+	fi
+
+	# with --raw, print default LMV stored in inode, otherwise print nothing
+	raw=$($LFS getdirstripe -D --raw $dir)
+	if (( enabled == 1 )); then
+		[ -z $raw ] ||
+			error "implicit inherited DMV is printed with --raw"
+	else
+		# if disabled, dmv is stored in inode, which will always
+		# print max-inherit-rr
+		echo $dir $raw
+		[[ $raw =~ $dmv.* ]] || error "$dir raw $raw != dmv $dmv"
+	fi
+}
+
+test_dmv_imp_inherit() {
+	local dmv
+	local raw
+	local index
+	local count
+	local inherit
+	local inherit_rr
+
+	rm -rf $DIR/$tdir || error "rm $tdir failed"
+	mkdir -p $DIR/$tdir || error "mkdir $tdir failed"
+
+	# set dir default LMV
+	$LFS setdirstripe -D -c1 -X4 --max-inherit-rr 2 $DIR/$tdir ||
+		error "setdirstripe -D $tdir failed"
+	dmv=$($LFS getdirstripe -D $DIR/$tdir)
+	raw=$($LFS getdirstripe -D --raw $DIR/$tdir)
+	[ "$dmv" == "$raw" ] || error "$dmv != $raw"
+
+	mkdir -p $DIR/$tdir/l1/l2/l3 || error "mkdir $DIR/$tdir/l1/l2/l3 failed"
+	check_default_lmv $DIR/$tdir/l1/l2/l3 -1 1 1 0
+	check_default_lmv $DIR2/$tdir/l1/l2/l3 -1 1 1 0
+
+	# below tests are valid only when this feature is enabled
+	local enabled=$(do_facet mds1 \
+		$LCTL get_param -n mdt.*-MDT0000*.enable_dmv_implicit_inherit)
+
+	(( enabled == 1 )) || return 0
+
+	# set l2 default LMV, dmv of l3 should change immediately
+	$LFS setdirstripe -D -i1 -c2 -X4 $DIR/$tdir/l1/l2 ||
+		error "setdirstripe -D $tdir/l1/l2 failed"
+
+	check_default_lmv $DIR/$tdir/l1/l2/l3 1 2 3
+	check_default_lmv $DIR2/$tdir/l1/l2/l3 1 2 3
+
+	# change tdir default LMV, dmv of l3 should be unchanged because dmv
+	# of l2 is explicitly set
+	$LFS setdirstripe -D -i2 -c2 -X3 $DIR/$tdir ||
+		error "setdirstripe -D $tdir failed"
+
+	check_default_lmv $DIR/$tdir/l1 2 2 2
+	check_default_lmv $DIR2/$tdir/l1 2 2 2
+	check_default_lmv $DIR/$tdir/l1/l2/l3 1 2 3
+	check_default_lmv $DIR2/$tdir/l1/l2/l3 1 2 3
+}
+
+test_114() {
+	(( MDSCOUNT >= 2 )) ||
+		skip "We need at least 2 MDTs for this test"
+
+	(( MDS1_VERSION >= $(version_code 2.15.55.45) )) ||
+		skip "Need server version at least 2.15.54.45"
+
+	test_dmv_imp_inherit
+
+	# disable dmv_imp_inherit to simulate old client
+	local mdts=$(comma_list $(mdts_nodes))
+
+	do_nodes $mdts $LCTL set_param -n \
+		mdt.*MDT*.enable_dmv_implicit_inherit=0
+	test_dmv_imp_inherit
+	do_nodes $mdts $LCTL set_param -n \
+		mdt.*MDT*.enable_dmv_implicit_inherit=1
+}
+run_test 114 "implicit default LMV inherit"
+
+test_115() {
+	local td=$DIR/$tdir
+
+	[ "$mds1_FSTYPE" == "ldiskfs" ] || skip_env "ldiskfs only test"
+
+	mkdir_on_mdt0 $td || error "can't mkdir"
+	# turn it htree (don't really needed)
+	createmany -m $td/f 3000 || error "can't createmany"
+
+	# here is an example of debugfs output for htree command:
+	# Entry #0: Hash 0x00000000, block 27
+	# Reading directory block 27, phys 16760
+	# 938 0x0016fb58-7f3d21f5 (32) f775   834 0x001db8c8-d31a4e0e (32) f671
+	# 1085 0x0040cb70-4498abd4 (32) f922   1850 0x0066a1e6-f6f0dc69 (32) f1687
+	# 2005 0x006c1a46-ef466058 (32) f1842   2025 0x007e64d4-8b28b734 (32) f1862
+	# 642 0x008b53a0-77adc601 (32) f479   447 0x009ec152-af54eea3 (32) f284
+	# 1740 0x00c38f56-ed310e61 (32) f1577   2165 0x00cdfd66-f429a93f (32) f2002
+	# 930 0x00d7ada4-b80421c9 (32) f767   1946 0x00da6a7a-e8080600 (32) f1783
+	# 273 0x00f8ea00-760bf97c (32) f110   1589 0x0103c4ee-94fad5dd (32) f1426
+	# 1383 0x01193516-83120b48 (32) f1220   2379 0x01431e3c-e85b5bd9 (32) f2216
+	#
+	# find couple names in a same htree block of the same size
+	mdt_dev=$(facet_device $SINGLEMDS)
+	de=( $(do_facet $SINGLEMDS "debugfs -c -R 'htree /ROOT/$tdir' $mdt_dev" |
+		awk '/Reading directory block/ { getline; print $4,$8; exit; }' ))
+	local de1=${de[0]}
+	local de2=${de[1]}
+	[[ $de1 == "" || $de2 == "" ]] && error "de1=$de1 de2=$de2"
+	echo "USE: $de1 $de2"
+	# release one mkdir will lookup
+	rm $DIR/$tdir/$de2
+#define OBD_FAIL_MDS_PAUSE_CREATE_AFTER_LOOKUP	0x2401
+	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x80002401 fail_val=5
+	mkdir $DIR/$tdir/$de2 &
+	sleep 0.3
+	local PID1=$!
+	# recreate $de2
+	mkdir $DIR2/$tdir/$de2
+	# release space $de1 (should be enough to save $de2)
+	rm $DIR2/$tdir/$de1
+	# ready to create a dup of $de2
+	wait $PID1
+	local found=$(ls $DIR/$tdir/|grep "^$de2\$"|wc -l)
+	(( $found == 1 )) || error "found $found"
+}
+run_test 115 "ldiskfs doesn't check direntry for uniqueness"
+
+test_116() {
+	(( $MDSCOUNT >= 2 )) || skip "needs >= 2 MDTs"
+	(( $MDS1_VERSION >= $(version_code 2.15.61) )) ||
+		skip "Need MDS version at least 2.15.61 for intent mkdir"
+
+	local mdt_idx
+	local save="$TMP/$TESTSUITE-$TESTNAME.parameters"
+
+	save_lustre_params client "llite.*.intent_mkdir" > $save
+	stack_trap "restore_lustre_params < $save; rm -f $save" EXIT
+	$LCTL set_param llite.*.intent_mkdir=1
+
+	$LFS mkdir -c$MDSCOUNT -i0 $DIR/$tdir ||
+		error "$LFS mkdir $DIR/$tdir failed"
+	echo "MD layout $DIR/$tdir:"
+	$LFS getdirstripe $DIR/$tdir
+	echo "mkdir $DIR/$tdir/tdir0"
+	mkdir $DIR/$tdir/tdir0 || error "mkdir tdir0 failed"
+	echo "setdirstripe -D -i1 $DIR2/$tdir/tdir0"
+	$LFS setdirstripe -D -i1 $DIR2/$tdir/tdir0 ||
+		error "$LFS setdirstripe $DIR2/$tdir/tdir0 failed"
+	echo "mkdir $DIR/$tdir/tdir0/tdir11"
+	mkdir $DIR/$tdir/tdir0/tdir11 || error "mkdir tdir0/tdir11 failed"
+	$LFS getdirstripe $DIR/$tdir/tdir0
+	$LFS getdirstripe $DIR/$tdir/tdir0/tdir11
+
+	mdt_idx=$($LFS getstripe -m $DIR/$tdir/tdir0/tdir11)
+	[ $mdt_idx == 1 ] ||
+		error "$DIR/$tdir/tdir0/tdir11 on wrong MDT $mdt_idx"
+}
+run_test 116 "DNE: Set default LMV layout from a remote client"
+
 log "cleanup: ======================================================"
 
 # kill and wait in each test only guarentee script finish, but command in script
@@ -4420,7 +6748,7 @@ log "cleanup: ======================================================"
 [ "$(mount | grep $MOUNT2)" ] && wait_update $HOSTNAME "fuser -m $MOUNT2" "" ||
 	true
 
-complete $SECONDS
+complete_test $SECONDS
 rm -f $SAMPLE_FILE
 check_and_cleanup_lustre
 exit_status