X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Ftests%2Frecovery-small.sh;h=cc5447940e085dd17762301a15ff73cbe8abb008;hp=ee148e06c293680af62f748c301a4662ec7b46f8;hb=301d76a71176c186129231ddd1323bae21100165;hpb=5f3e926ac9ff8ad134ad920d0e8545e16395ef3b

diff --git a/lustre/tests/recovery-small.sh b/lustre/tests/recovery-small.sh
index ee148e0..cc54479 100755
--- a/lustre/tests/recovery-small.sh
+++ b/lustre/tests/recovery-small.sh
@@ -2,29 +2,18 @@
 
 set -e
 
-#         bug  5493  LU2034
-ALWAYS_EXCEPT="52    60      $RECOVERY_SMALL_EXCEPT"
-
-export MULTIOP=${MULTIOP:-multiop}
 PTLDEBUG=${PTLDEBUG:--1}
-LUSTRE=${LUSTRE:-`dirname $0`/..}
+LUSTRE=${LUSTRE:-$(dirname $0)/..}
 . $LUSTRE/tests/test-framework.sh
 init_test_env $@
-. ${CONFIG:=$LUSTRE/tests/cfg/$NAME.sh}
 init_logging
 
-require_dsh_mds || exit 0
-
-# also long tests: 19, 21a, 21e, 21f, 23, 27
-#                                   1  2.5  2.5    4    4          (min)"
-[ "$SLOW" = "no" ] && EXCEPT_SLOW="17  26a  26b    50   51     57"
-
-[ $(facet_fstype $SINGLEMDS) = "zfs" ] &&
-# bug number for skipped test:	      LU-2194 LU-2547
-	ALWAYS_EXCEPT="$ALWAYS_EXCEPT 19b     24a 24b"
+ALWAYS_EXCEPT="$RECOVERY_SMALL_EXCEPT "
 
 build_test_filter
 
+require_dsh_mds || exit 0
+
 # Allow us to override the setup if we already have a mounted system by
 # setting SETUP=" " and CLEANUP=" "
 SETUP=${SETUP:-""}
@@ -149,21 +138,181 @@ test_9() {
 run_test 9 "pause bulk on OST (bug 1420)"
 
 #bug 1521
-test_10() {
-	do_facet client mcreate $DIR/$tfile ||
-		{ error "mcreate failed: $?"; return 1; }
-	drop_bl_callback "chmod 0777 $DIR/$tfile"  || echo "evicted as expected"
-	# wait for the mds to evict the client
-	#echo "sleep $(($TIMEOUT*2))"
-	#sleep $(($TIMEOUT*2))
-	do_facet client touch $DIR/$tfile || echo "touch failed, evicted"
-	do_facet client checkstat -v -p 0777 $DIR/$tfile ||
-		{ error "client checkstat failed: $?"; return 3; }
-	do_facet client "munlink $DIR/$tfile"
-	# allow recovery to complete
-	client_up || client_up || sleep $TIMEOUT
+test_10a() {
+	local before=$(date +%s)
+	local evict
+
+	do_facet client "stat $DIR > /dev/null"  ||
+		error "failed to stat $DIR: $?"
+	drop_bl_callback "chmod 0777 $DIR" ||
+		error "failed to chmod $DIR: $?"
+
+	# let the client reconnect
+	client_reconnect
+	evict=$(do_facet client $LCTL get_param mdc.$FSNAME-MDT*.state |
+	  awk -F"[ [,]" '/EVICTED ]$/ { if (mx<$5) {mx=$5;} } END { print mx }')
+	[ ! -z "$evict" ] && [[ $evict -gt $before ]] ||
+		(do_facet client $LCTL get_param mdc.$FSNAME-MDT*.state;
+		    error "no eviction: $evict before:$before")
+
+	do_facet client checkstat -v -p 0777 $DIR ||
+		error "client checkstat failed: $?"
 }
-run_test 10 "finish request on server after client eviction (bug 1521)"
+run_test 10a "finish request on server after client eviction (bug 1521)"
+
+test_10b() {
+	local before=$(date +%s)
+	local evict
+
+	[[ "$MDS1_VERSION" -lt $(version_code 2.6.53) ]] &&
+		skip "Need MDS version at least 2.6.53"
+	do_facet client "stat $DIR > /dev/null"  ||
+		error "failed to stat $DIR: $?"
+	drop_bl_callback_once "chmod 0777 $DIR" ||
+		error "failed to chmod $DIR: $?"
+
+	# let the client reconnect
+	client_reconnect
+	evict=$(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")
+
+	do_facet client checkstat -v -p 0777 $DIR ||
+ 		error "client checkstat failed: $?"
+}
+run_test 10b "re-send BL AST"
+
+test_10c() {
+	local before=$(date +%s)
+	local evict
+	local mdccli
+	local mdcpath
+	local conn_uuid
+	local workdir
+	local pid
+	local rc
+
+	workdir="${DIR}/${tdir}"
+	mkdir -p ${workdir} || error "can't create workdir $?"
+	stat ${workdir} > /dev/null ||
+		error "failed to stat ${workdir}: $?"
+	mdtidx=$($LFS getdirstripe -i ${workdir})
+	mdtname=$($LFS mdts ${workdir} | grep -e "^$mdtidx:" |
+		  awk '{sub("_UUID", "", $2); print $2;}')
+	#assume one client
+	mdccli=$($LCTL dl | grep "${mdtname}-mdc" | awk '{print $4;}')
+	conn_uuid=$($LCTL get_param -n mdc.${mdccli}.conn_uuid)
+	mdcpath="mdc.${mdccli}.import=connection=${conn_uuid}"
+
+	drop_bl_callback_once "chmod 0777 ${workdir}" &
+	pid=$!
+
+	# let chmod blocked
+	sleep 1
+	# force client reconnect
+	$LCTL set_param "${mdcpath}"
+
+	# wait client reconnect
+	client_reconnect
+	wait $pid
+	rc=$?
+	evict=$($LCTL get_param mdc.${mdccli}.state |
+	   awk -F"[ [,]" '/EVICTED]$/ { if (t<$4) {t=$4;} } END { print t }')
+
+	[[ $evict -le $before ]] ||
+		( $LCTL get_param mdc.$FSNAME-MDT*.state;
+		    error "eviction happened: $EVICT before:$BEFORE" )
+
+	[ $rc -eq 0 ] || error "chmod must finished OK"
+	checkstat -v -p 0777 "${workdir}" ||
+		error "client checkstat failed: $?"
+}
+run_test 10c "re-send BL AST vs reconnect race (LU-5569)"
+
+test_10d() {
+	local before=$(date +%s)
+	local evict
+
+	[[ "$MDS1_VERSION" -lt $(version_code 2.6.90) ]] &&
+		skip "Need MDS version at least 2.6.90"
+
+	# sleep 1 is to make sure that BEFORE is not equal to EVICTED below
+	sleep 1
+	rm -f $TMP/$tfile
+	echo -n ", world" | dd of=$TMP/$tfile bs=1c seek=5
+
+	remount_client $MOUNT
+	mount_client $MOUNT2
+
+	cancel_lru_locks osc
+	$LFS setstripe -i 0 -c 1 $DIR1/$tfile
+	echo -n hello | dd of=$DIR1/$tfile bs=5
+
+	stat $DIR2/$tfile >& /dev/null
+	$LCTL set_param fail_err=71
+	drop_bl_callback "echo -n \\\", world\\\" >> $DIR2/$tfile"
+
+	client_reconnect
+
+	cancel_lru_locks osc
+	cmp -l $DIR1/$tfile $DIR2/$tfile || error "file contents differ"
+	cmp -l $DIR1/$tfile $TMP/$tfile || error "wrong content found"
+
+	evict=$(do_facet client $LCTL get_param osc.$FSNAME-OST0000*.state | \
+		tr -d '\-\[\] ' | \
+	  awk -F"[ [,]" '/EVICTED$/ { if (mx<$1) {mx=$1;} } END { print mx }')
+
+	[[ $evict -gt $before ]] ||
+		(do_facet client $LCTL get_param osc.$FSNAME-OST0000*.state;
+		    error "no eviction: $evict before:$before")
+
+	$LCTL set_param fail_err=0
+	rm $TMP/$tfile
+	umount_client $MOUNT2
+}
+run_test 10d "test failed blocking ast"
+
+test_10e()
+{
+	[[ "$OST1_VERSION" -le $(version_code 2.8.58) ]] &&
+		skip "Need OST version at least 2.8.59"
+	[ $CLIENTCOUNT -lt 2 ] && skip "need two clients"
+	[ $(facet_host client) == $(facet_host ost1) ] &&
+		skip "need ost1 and client on different nodes"
+	local -a clients=(${CLIENTS//,/ })
+	local client1=${clients[0]}
+	local client2=${clients[1]}
+
+	$LFS setstripe -c 1 -i 0 $DIR/$tfile-1 $DIR/$tfile-2
+	$MULTIOP $DIR/$tfile-1 Ow1048576c
+
+#define OBD_FAIL_LDLM_BL_CALLBACK_NET                   0x305
+	$LCTL set_param fail_loc=0x80000305
+
+#define OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT 0x30e
+	do_facet ost1 "$LCTL set_param fail_loc=0x1000030e"
+	# hit OBD_FAIL_LDLM_ENQUEUE_OLD_EXPORT twice:
+	# 1. to return ENOTCONN from ldlm_handle_enqueue0
+	# 2. to pause reconnect handling between resend and setting
+	# import to LUSTRE_IMP_FULL state
+	do_facet ost1 "$LCTL set_param fail_val=3"
+
+	# client1 fails ro respond to bl ast
+	do_node $client2 "$MULTIOP $DIR/$tfile-1 Ow1048576c" &
+	MULTIPID=$!
+
+	# ost1 returns error on enqueue, which causes client1 to reconnect
+	do_node $client1 "$MULTIOP $DIR/$tfile-2 Ow1048576c" ||
+		error "multiop failed"
+	wait $MULTIPID
+
+	do_facet ost1 "$LCTL set_param fail_loc=0"
+	do_facet ost1 "$LCTL set_param fail_val=0"
+}
+run_test 10e "re-send BL AST vs reconnect race 2"
 
 #bug 2460
 # wake up a thread waiting for completion after eviction
@@ -177,7 +326,8 @@ test_11(){
 
 	do_facet client $MULTIOP $DIR/$tfile or  ||
 		{ error "multiop read failed: $?"; return 3; }
-	drop_bl_callback $MULTIOP $DIR/$tfile Ow || echo "evicted as expected"
+	drop_bl_callback_once $MULTIOP $DIR/$tfile Ow ||
+		echo "evicted as expected"
 
 	do_facet client munlink $DIR/$tfile ||
 		{ error "munlink failed: $?"; return 4; }
@@ -264,10 +414,11 @@ test_16() {
 	sleep $TIMEOUT
 	do_facet client "cmp $TMP/$tfile $DIR/$tfile" || return 2
 	start_read_ahead
+	rm -f $TMP/$tfile
 }
 run_test 16 "timeout bulk put, don't evict client (2732)"
 
-test_17() {
+test_17a() {
     local at_max_saved=0
 
     remote_ost_nodsh && skip "remote OST with nodsh" && return 0
@@ -301,7 +452,93 @@ test_17() {
     [ $at_max_saved -ne 0 ] && at_max_set $at_max_saved ost1
     return 0
 }
-run_test 17 "timeout bulk get, don't evict client (2732)"
+run_test 17a "timeout bulk get, don't evict client (2732)"
+
+test_17b() {
+	[ -z "$RCLIENTS" ] && skip "Needs multiple clients" && return 0
+
+	# get one of the clients from client list
+	local rcli=$(echo $RCLIENTS | cut -d ' ' -f 1)
+	local p="$TMP/$TESTSUITE-$TESTNAME.parameters"
+	local ldlm_enqueue_min=$(do_facet ost1 find /sys -name ldlm_enqueue_min)
+	[ -z "$ldlm_enqueue_min" ] &&
+		skip "missing /sys/.../ldlm_enqueue_min" && return 0
+
+	$LFS setstripe -i 0 -c 1 -S 1048576 $DIR/$tfile ||
+		error "setstripe failed"
+	$LFS setstripe -i 0 -c 1 -S 1048576 $DIR/${tfile}2 ||
+		error "setstripe 2 failed"
+
+	save_lustre_params ost1 "at_history" > $p
+	save_lustre_params ost1 "bulk_timeout" >> $p
+	local dev="${FSNAME}-OST0000"
+	save_lustre_params ost1 "obdfilter.$dev.brw_size" >> $p
+	local ldlm_enqueue_min_save=$(do_facet ost1 cat $ldlm_enqueue_min)
+
+	local new_at_history=15
+
+	do_facet ost1 "$LCTL set_param at_history=$new_at_history"
+	do_facet ost1 "$LCTL set_param bulk_timeout=30"
+	do_facet ost1 "echo 30 > /sys/module/ptlrpc/parameters/ldlm_enqueue_min"
+
+	# brw_size is required to be 4m so that bulk transfer timeout
+	# could be simulated with OBD_FAIL_PTLRPC_CLIENT_BULK_CB3
+	local brw_size=$($LCTL get_param -n \
+	    osc.$FSNAME-OST0000-osc-[^M]*.import |
+	    awk '/max_brw_size/{print $2}')
+	if [ $brw_size -ne 4194304 ]
+	then
+		save_lustre_params ost1 "obdfilter.$dev.brw_size" >> $p
+		do_facet ost1 "$LCTL set_param obdfilter.$dev.brw_size=4"
+		remount_client $MOUNT
+	fi
+
+	# get service estimate expanded
+	#define OBD_FAIL_OST_BRW_PAUSE_PACK		 0x224
+	do_facet ost1 "$LCTL set_param fail_loc=0x80000224 fail_val=35"
+	echo "delay rpc servicing by 35 seconds"
+	dd if=/dev/zero of=$DIR/$tfile bs=1M count=1 conv=fdatasync
+
+	local estimate
+	estimate=$($LCTL get_param -n osc.$dev-osc-*.timeouts |
+	    awk '/portal 6/ {print $5}')
+	echo "service estimates increased to $estimate"
+
+	# let current worst service estimate to get closer to obliteration
+	sleep $((new_at_history / 3))
+
+	# start i/o and simulate bulk transfer loss
+	#define OBD_FAIL_PTLRPC_CLIENT_BULK_CB3     0x520
+	do_facet ost1 "$LCTL set_param fail_loc=0xa0000520 fail_val=1"
+	dd if=/dev/zero of=$DIR/$tfile bs=2M count=1 conv=fdatasync,notrunc &
+	local writedd=$!
+
+	# start lock conflict handling
+	sleep $((new_at_history / 3))
+	do_node $rcli "dd if=$DIR/$tfile of=/dev/null bs=1M count=1" &
+	local readdd=$!
+
+	# obliterate the worst service estimate
+	sleep $((new_at_history / 3 + 1))
+	dd if=/dev/zero of=$DIR/${tfile}2 bs=1M count=1
+
+	estimate=$($LCTL get_param -n osc.$dev-osc-*.timeouts |
+	    awk '/portal 6/ {print $5}')
+	echo "service estimate dropped to $estimate"
+
+	wait $writedd
+	[[ $? == 0 ]] || error "write failed"
+	wait $readdd
+	[[ $? == 0 ]] || error "read failed"
+
+	restore_lustre_params <$p
+	if [ $brw_size -ne 4194304 ]
+	then
+		remount_client $MOUNT || error "remount_client failed"
+	fi
+	do_facet ost1 "echo $ldlm_enqueue_min_save > $ldlm_enqueue_min"
+}
+run_test 17b "timeout bulk get, dont evict client (3582)"
 
 test_18a() {
     [ -z ${ost2_svc} ] && skip_env "needs 2 osts" && return 0
@@ -332,7 +569,7 @@ test_18a() {
     rc=0
     pgcache_empty || rc=2
     $LCTL --device $osc2dev activate
-    rm -f $f
+    rm -f $f $TMP/$tfile
     return $rc
 }
 run_test 18a "manual ost invalidate clears page cache immediately"
@@ -365,7 +602,7 @@ test_18b() {
     # cache after the client reconnects?     
     rc=0
     pgcache_empty || rc=2
-    rm -f $f
+    rm -f $f $TMP/$tfile
     return $rc
 }
 run_test 18b "eviction and reconnect clears page cache (2766)"
@@ -398,13 +635,13 @@ test_18c() {
     do_facet ost1 lctl set_param fail_loc=0x80000225
     # force reconnect
     sleep 1
-    df $MOUNT > /dev/null 2>&1
+    $LFS df $MOUNT > /dev/null 2>&1
     sleep 2
     # my understanding is that there should be nothing in the page
-    # cache after the client reconnects?     
+    # cache after the client reconnects?
     rc=0
     pgcache_empty || rc=2
-    rm -f $f
+    rm -f $f $TMP/$tfile
     return $rc
 }
 run_test 18c "Dropped connect reply after eviction handing (14755)"
@@ -427,8 +664,9 @@ test_19a() {
 
 	# let the client reconnect
 	client_reconnect
-	EVICT=$(do_facet client $LCTL get_param mdc.$FSNAME-MDT*.state | \
-	    awk -F"[ [,]" '/EVICTED]$/ { if (mx<$4) {mx=$4;} } END { print mx }')
+	EVICT=$(do_facet client $LCTL get_param mdc.$FSNAME-MDT*.state |
+		awk -F"[ [,]" '/EVICTED ]$/ \
+			{ if (mx<$5) {mx=$5;} } END { print mx }')
 
 	[ ! -z "$EVICT" ] && [[ $EVICT -gt $BEFORE ]] ||
 		(do_facet client $LCTL get_param mdc.$FSNAME-MDT*.state;
@@ -456,8 +694,9 @@ test_19b() {
 
 	# let the client reconnect
 	client_reconnect
-	EVICT=$(do_facet client $LCTL get_param osc.$FSNAME-OST*.state | \
-	    awk -F"[ [,]" '/EVICTED]$/ { if (mx<$4) {mx=$4;} } END { print mx }')
+	EVICT=$(do_facet client $LCTL get_param osc.$FSNAME-OST*.state |
+		awk -F"[ [,]" '/EVICTED ]$/ \
+			{ if (mx < $5) {mx = $5;} } END { print mx }')
 
 	[ ! -z "$EVICT" ] && [[ $EVICT -gt $BEFORE ]] ||
 		(do_facet client $LCTL get_param osc.$FSNAME-OST*.state;
@@ -489,7 +728,7 @@ test_19c() {
 	# let the client reconnect
 	sleep 5
 	EVICT=$(do_facet client $LCTL get_param mdc.$FSNAME-MDT*.state |
-	   awk -F"[ [,]" '/EVICTED]$/ { if (mx<$4) {mx=$4;} } END { print mx }')
+	  awk -F"[ [,]" '/EVICTED ]$/ { if (mx<$5) {mx=$5;} } END { print mx }')
 
 	[ -z "$EVICT" ] || [[ $EVICT -le $BEFORE ]] || error "eviction happened"
 }
@@ -787,7 +1026,8 @@ test_24b() {
 
 	dmesg -c > /dev/null
 	mkdir -p $DIR/$tdir
-	lfs setstripe $DIR/$tdir -s 0 -i 0 -c 1
+	lfs setstripe $DIR/$tdir -S 0 -i 0 -c 1 ||
+		error "$LFS setstripe failed"
 	cancel_lru_locks osc
 	multiop_bg_pause $DIR/$tdir/$tfile-1 Ow8192_yc ||
 		error "mulitop Ow8192_yc failed"
@@ -829,20 +1069,23 @@ test_26a() {      # was test_26 bug 5921 - evict dead exports by pinger
 
 	check_timeout || return 1
 
-	local OST_NEXP=$(do_facet ost1 lctl get_param -n obdfilter.${ost1_svc}.num_exports | cut -d' ' -f2)
-
-	echo starting with $OST_NEXP OST exports
+	# make sure all imports are connected and not IDLE
+	do_facet client lfs df > /dev/null
 # OBD_FAIL_PTLRPC_DROP_RPC 0x505
 	do_facet client lctl set_param fail_loc=0x505
-        # evictor takes PING_EVICT_TIMEOUT + 3 * PING_INTERVAL to evict.
-        # But if there's a race to start the evictor from various obds,
-        # the loser might have to wait for the next ping.
-
+	local before=$(date +%s)
 	local rc=0
-	wait_client_evicted ost1 $OST_NEXP $((TIMEOUT * 2 + TIMEOUT * 3 / 4))
-	rc=$?
+
+	# evictor takes PING_EVICT_TIMEOUT + 3 * PING_INTERVAL to evict.
+	# But if there's a race to start the evictor from various obds,
+	# the loser might have to wait for the next ping.
+	sleep $((TIMEOUT * 2 + TIMEOUT * 3 / 4))
 	do_facet client lctl set_param fail_loc=0x0
-        [ $rc -eq 0 ] || error "client not evicted from OST"
+	do_facet client lfs df > /dev/null
+
+	local oscs=$(lctl dl | awk '/-osc-/ {print $4}')
+	check_clients_evicted $before ${oscs[@]}
+	check_clients_full 10 ${oscs[@]}
 }
 run_test 26a "evict dead exports"
 
@@ -876,10 +1119,9 @@ test_26b() {      # bug 10140 - evict dead exports by pinger
 	# = 9 * PING_INTERVAL + PING_INTERVAL
 	# = 10 PING_INTERVAL = 10 obd_timeout / 4 = 2.5 obd_timeout
 	# let's wait $((TIMEOUT * 3)) # bug 19887
-	local rc=0
-	wait_client_evicted ost1 $OST_NEXP $((TIMEOUT * 3)) || \
-		error "Client was not evicted by ost" rc=1
-	wait_client_evicted $SINGLEMDS $MDS_NEXP $((TIMEOUT * 3)) || \
+	wait_client_evicted ost1 $OST_NEXP $((TIMEOUT * 3)) ||
+		error "Client was not evicted by ost"
+	wait_client_evicted $SINGLEMDS $MDS_NEXP $((TIMEOUT * 3)) ||
 		error "Client was not evicted by mds"
 }
 run_test 26b "evict dead exports"
@@ -908,7 +1150,8 @@ run_test 27 "fail LOV while using OSC's"
 
 test_28() {      # bug 6086 - error adding new clients
 	do_facet client mcreate $DIR/$tfile       || return 1
-	drop_bl_callback "chmod 0777 $DIR/$tfile" ||echo "evicted as expected"
+	drop_bl_callback_once "chmod 0777 $DIR/$tfile" ||
+		echo "evicted as expected"
 	#define OBD_FAIL_MDS_CLIENT_ADD 0x12f
 	do_facet $SINGLEMDS "lctl set_param fail_loc=0x8000012f"
 	# fail once (evicted), reconnect fail (fail_loc), ok
@@ -982,7 +1225,7 @@ test_51() {
         for i in $SEQ
         do
 		#echo failover in $i sec
-		log "test_$testnum: failover in $i sec"
+		log "$TESTNAME: failover in $i sec"
 		sleep $i
 		facet_failover $SINGLEMDS
         done
@@ -1039,21 +1282,22 @@ run_test 52 "failover OST under load"
 # test of open reconstruct
 test_53() {
 	touch $DIR/$tfile
-	drop_ldlm_reply "openfile -f O_RDWR:O_CREAT -m 0755 $DIR/$tfile" ||\
+	drop_mdt_ldlm_reply "openfile -f O_RDWR:O_CREAT -m 0755 $DIR/$tfile" ||\
 		return 2
 }
 run_test 53 "touch: drop rep"
 
 test_54() {
-	zconf_mount `hostname` $MOUNT2
-        touch $DIR/$tfile
-        touch $DIR2/$tfile.1
-        sleep 10
-        cat $DIR2/$tfile.missing # save transno = 0, rc != 0 into last_rcvd
-        fail $SINGLEMDS
-        umount $MOUNT2
-        ERROR=`dmesg | egrep "(test 54|went back in time)" | tail -n1 | grep "went back in time"`
-        [ x"$ERROR" == x ] || error "back in time occured"
+	zconf_mount $(hostname) $MOUNT2
+	touch $DIR/$tfile
+	touch $DIR2/$tfile.1
+	sleep 10
+	cat $DIR2/$tfile.missing # save transno = 0, rc != 0 into last_rcvd
+	fail $SINGLEMDS
+	umount $MOUNT2
+	ERROR=$(dmesg | egrep "(test 54|went back in time)" | tail -n1 |
+		grep "went back in time")
+	[ x"$ERROR" == x ] || error "back in time occured"
 }
 run_test 54 "back in time"
 
@@ -1063,10 +1307,17 @@ test_55() {
 
 	mkdir -p $DIR/$tdir
 
+	# This test assumes relatively small max_dirty_mb setting
+	# which we want to walk away from, so just for it we will
+	# temporarily lower the value
+	local max_dirty_mb=$(lctl get_param -n osc.*.max_dirty_mb | head -n 1)
+	lctl set_param -n osc.*.max_dirty_mb=32
+	stack_trap "lctl set_param osc.*.max_dirty_mb=$max_dirty_mb" EXIT
+
 	# Minimum pass speed is 2MBps
 	local ddtimeout=64
 	# LU-2887/LU-3089 - set min pass speed to 500KBps
-	[ "$(facet_fstype ost1)" = "zfs" ] && ddtimeout=256
+	[ "$ost1_FSTYPE" = zfs ] && ddtimeout=256
 
 	# first dd should be finished quickly
 	$LFS setstripe -c 1 -i 0 $DIR/$tdir/$tfile-1
@@ -1122,11 +1373,11 @@ test_56() { # b=11277
 #define OBD_FAIL_MDS_RESEND      0x136
         touch $DIR/$tfile
         do_facet $SINGLEMDS "lctl set_param fail_loc=0x80000136"
-        stat $DIR/$tfile
+        stat $DIR/$tfile || error "stat failed"
         do_facet $SINGLEMDS "lctl set_param fail_loc=0"
         rm -f $DIR/$tfile
 }
-run_test 56 "do not allow reconnect to busy exports"
+run_test 56 "do not fail on getattr resend"
 
 test_57_helper() {
         # no oscs means no client or mdt 
@@ -1160,10 +1411,10 @@ test_58() { # bug 11546
         pid=$!
         sleep 1
         lctl set_param fail_loc=0
-        drop_bl_callback rm -f $DIR/$tfile
+        drop_bl_callback_once rm -f $DIR/$tfile
         wait $pid
         # the first 'df' could tigger the eviction caused by
-        # 'drop_bl_callback', and it's normal case.
+        # 'drop_bl_callback_once', and it's normal case.
         # but the next 'df' should return successfully.
         do_facet client "df $DIR" || do_facet client "df $DIR"
 }
@@ -1187,63 +1438,47 @@ test_59() { # bug 10589
 }
 run_test 59 "Read cancel race on client eviction"
 
-err17935 () {
-	# we assume that all md changes are in the MDT0 changelog
-	if [ $MDSCOUNT -gt 1 ]; then
-		error_ignore bz17935 $*
-	else
-		error $*
-	fi
-}
-
 test_60() {
-        MDT0=$($LCTL get_param -n mdc.*.mds_server_uuid | \
-	    awk '{gsub(/_UUID/,""); print $1}' | head -1)
-
-	NUM_FILES=15000
-	mkdir -p $DIR/$tdir
+	local num_files=${COUNT:-5000}
+	test_mkdir $DIR/$tdir
 
 	# Register (and start) changelog
-	USER=$(do_facet $SINGLEMDS lctl --device $MDT0 changelog_register -n)
-	echo "Registered as $MDT0 changelog user $USER"
+	changelog_register || error "changelog_register failed"
 
 	# Generate a large number of changelog entries
-	createmany -o $DIR/$tdir/$tfile $NUM_FILES
+	createmany -o $DIR/$tdir/$tfile $num_files
 	sync
 	sleep 5
 
 	# Unlink files in the background
-	unlinkmany $DIR/$tdir/$tfile $NUM_FILES	&
-	CLIENT_PID=$!
+	unlinkmany $DIR/$tdir/$tfile $num_files &
+	local client_pid=$!
 	sleep 1
 
 	# Failover the MDS while unlinks are happening
 	facet_failover $SINGLEMDS
 
 	# Wait for unlinkmany to finish
-	wait $CLIENT_PID
+	wait $client_pid
 
 	# Check if all the create/unlink events were recorded
 	# in the changelog
-	$LFS changelog $MDT0 >> $DIR/$tdir/changelog
-	local cl_count=$(grep UNLNK $DIR/$tdir/changelog | wc -l)
-	echo "$cl_count unlinks in $MDT0 changelog"
-
-	do_facet $SINGLEMDS lctl --device $MDT0 changelog_deregister $USER
-	USERS=$(( $(do_facet $SINGLEMDS lctl get_param -n \
-	    mdd.$MDT0.changelog_users | wc -l) - 2 ))
-	if [ $USERS -eq 0 ]; then
-	    [ $cl_count -eq $NUM_FILES ] || \
-		err17935 "Recorded ${cl_count} unlinks out of $NUM_FILES"
-	    # Also make sure we can clear large changelogs
-	    cl_count=$($LFS changelog $FSNAME | wc -l)
-	    [ $cl_count -le 2 ] || \
-		error "Changelog not empty: $cl_count entries"
-	else
-	    # If there are other users, there may be other unlinks in the log
-	    [ $cl_count -ge $NUM_FILES ] || \
-		err17935 "Recorded ${cl_count} unlinks out of $NUM_FILES"
-	    echo "$USERS other changelog users; can't verify clear"
+	local cl_count=$(changelog_dump | grep -c UNLNK)
+	echo "$cl_count unlinks in changelog"
+
+	changelog_deregister || error "changelog_deregister failed"
+	if ! changelog_users $SINGLEMDS | grep -q "^cl"; then
+		[ $cl_count -eq $num_files ] ||
+			error "Recorded $cl_count of $num_files unlinks"
+		# Also make sure we can clear large changelogs
+		cl_count=$(changelog_dump | wc -l)
+		[ $cl_count -le 2 ] ||
+			error "Changelog not empty: $cl_count entries"
+	else # If other users, there may be other unlinks in the log
+		[ $cl_count -ge $num_files ] ||
+			error "Recorded $cl_count of $num_files unlinks"
+		changelog_users $SINGLEMDS
+		echo "other changelog users; can't verify clear"
 	fi
 }
 run_test 60 "Add Changelog entries during MDS failover"
@@ -1262,12 +1497,14 @@ test_61()
 
 	replay_barrier $SINGLEMDS
 	createmany -o $DIR/$tdir/$tfile-%d 10 
-	local oid=`do_facet ost1 "lctl get_param -n obdfilter.${ost1_svc}.last_id"`
+	local oid=$(do_facet ost1 "lctl get_param -n \
+		obdfilter.${ost1_svc}.last_id" | sed -e 's/.*://')
 
 	fail_abort $SINGLEMDS
-	
+
 	touch $DIR/$tdir/$tfile
-	local id=`$LFS getstripe $DIR/$tdir/$tfile | awk '$1 == 0 { print $2 }'`
+	local id=$($LFS getstripe $DIR/$tdir/$tfile |
+		awk '$1 == 0 { print $2 }')
 	[ $id -le $oid ] && error "the orphan objid was reused, failed"
 
 	# Cleanup
@@ -1285,6 +1522,92 @@ run_test 61 "Verify to not reuse orphan objects - bug 17025"
 #}
 #run_test 62 "Verify connection flags race - bug LU-1716"
 
+test_65() {
+	mount_client $DIR2
+
+	#grant lock1, export2
+	$LFS setstripe -i -0 $DIR2/$tfile || error "setstripe failed"
+	$MULTIOP $DIR2/$tfile Ow  || error "multiop failed"
+
+#define OBD_FAIL_LDLM_BL_EVICT            0x31e
+	do_facet ost $LCTL set_param fail_loc=0x31e
+	#get waiting lock2, export1
+	$MULTIOP $DIR/$tfile Ow &
+	PID1=$!
+	# let enqueue to get asleep
+	sleep 2
+
+	#get lock2 blocked
+	$MULTIOP $DIR2/$tfile Ow &
+	PID2=$!
+	sleep 2
+
+	#evict export1
+	ost_evict_client
+
+	sleep 2
+	do_facet ost $LCTL set_param fail_loc=0
+
+	wait $PID1
+	wait $PID2
+
+	umount_client $DIR2
+}
+run_test 65 "lock enqueue for destroyed export"
+
+test_66()
+{
+	[[ "$MDS1_VERSION" -ge $(version_code 2.7.51) ]] ||
+		skip "Need MDS version at least 2.7.51"
+
+	local list=$(comma_list $(osts_nodes))
+
+	# modify dir so that next revalidate would not obtain UPDATE lock
+	touch $DIR
+
+	# drop 1 reply with UPDATE lock
+	mcreate $DIR/$tfile || error "mcreate failed: $?"
+	drop_mdt_ldlm_reply_once "stat $DIR/$tfile" &
+	sleep 2
+
+	# make the re-sent lock to sleep
+#define OBD_FAIL_MDS_RESEND              0x136
+	do_nodes $list $LCTL set_param fail_loc=0x80000136
+
+	#initiate the re-connect & re-send
+	local mdtname="MDT0000"
+	local mdccli=$($LCTL dl | grep "${mdtname}-mdc" | awk '{print $4;}')
+	local conn_uuid=$($LCTL get_param -n mdc.${mdccli}.conn_uuid)
+	$LCTL set_param "mdc.${mdccli}.import=connection=${conn_uuid}"
+	sleep 2
+
+	#initiate the client eviction while enqueue re-send is in progress
+	mds_evict_client
+
+	client_reconnect
+	wait
+}
+run_test 66 "lock enqueue re-send vs client eviction"
+
+test_67()
+{
+#define OBD_FAIL_PTLRPC_CONNECT_RACE	 0x531
+	$LCTL set_param fail_loc=0x80000531
+
+	local mdtname="MDT0000"
+	local mdccli=$($LCTL dl | grep "${mdtname}-mdc" | awk '{print $4;}')
+	local conn_uuid=$($LCTL get_param -n mdc.${mdccli}.mds_conn_uuid)
+	$LCTL set_param "mdc.${mdccli}.import=connection=${conn_uuid}" &
+	sleep 2
+
+	mds_evict_client
+	sleep 1
+
+	client_reconnect
+	wait
+}
+run_test 67 "connect vs import invalidate race"
+
 check_cli_ir_state()
 {
         local NODE=${1:-$HOSTNAME}
@@ -1303,6 +1626,11 @@ check_target_ir_state()
         local recovery_proc=obdfilter.${!name}.recovery_status
         local st
 
+	while : ; do
+		st=$(do_facet $target "$LCTL get_param -n $recovery_proc |
+			awk '/status:/{ print \\\$2}'")
+		[ x$st = xRECOVERING ] || break
+	done
         st=$(do_facet $target "lctl get_param -n $recovery_proc |
                                awk '/IR:/{ print \\\$2}'")
 	[ $st != ON -o $st != OFF -o $st != ENABLED -o $st != DISABLED ] ||
@@ -1384,8 +1712,8 @@ target_instance_match()
 
         local target=${srv}_svc
         local si=$(do_facet $srv lctl get_param -n $obdname.${!target}.instance)
-        local ci=$(lctl get_param -n $cliname.${!target}-${cliname}-*.import | \
-                  awk '/instance/{ print $2 }' |head -1)
+	local ci=$(lctl get_param -n $cliname.${!target}-${cliname}-*.import |
+		awk '/instance/{ print $2 }' | head -n1)
 
         return $([ $si -eq $ci ])
 }
@@ -1424,26 +1752,45 @@ test_100()
 }
 run_test 100 "IR: Make sure normal recovery still works w/o IR"
 
-test_101()
+test_101a()
 {
-        do_facet mgs $LCTL list_param mgs.*.ir_timeout ||
-                { skip "MGS without IR support"; return 0; }
+	do_facet mgs $LCTL list_param mgs.*.ir_timeout ||
+		skip "MGS without IR support"
 
-        set_ir_status full
+	set_ir_status full
 
-        local OST1_IMP=$(get_osc_import_name client ost1)
+	local ost1_imp=$(get_osc_import_name client ost1)
 
-        # disable pinger recovery
-        lctl set_param -n osc.$OST1_IMP.pinger_recov=0
+	# disable pinger recovery
+	lctl set_param -n osc.$ost1_imp.pinger_recov=0
+	stack_trap "$LCTL set_param -n osc.$ost1_imp.pinger_recov=1" EXIT
 
-        fail ost1
+	fail ost1
 
-        target_instance_match ost1 || error "instance mismatch"
-        nidtbl_versions_match || error "version must match"
+	target_instance_match ost1 || error "instance mismatch"
+	nidtbl_versions_match || error "version must match"
+}
+run_test 101a "IR: Make sure IR works w/o normal recovery"
+
+test_101b()
+{
+	do_facet mgs $LCTL list_param mgs.*.ir_timeout ||
+		skip "MGS without IR support"
 
-        lctl set_param -n osc.$OST1_IMP.pinger_recov=1
+	set_ir_status full
+
+	local ost1_imp=$(get_osc_import_name client ost1)
+
+#define OBD_FAIL_OST_PREPARE_DELAY	 0x247
+	do_facet ost1 "$LCTL set_param fail_loc=0x247"
+	# disable pinger recovery
+	$LCTL set_param -n osc.$ost1_imp.pinger_recov=0
+	stack_trap "$LCTL set_param -n osc.$ost1_imp.pinger_recov=1" EXIT
+
+#OST may return EAGAIN if it is not configured yet
+	fail ost1
 }
-run_test 101 "IR: Make sure IR works w/o normal recovery"
+run_test 101b "IR: Make sure IR works w/o normal recovery and proceed EAGAIN"
 
 test_102()
 {
@@ -1499,7 +1846,7 @@ test_103()
         do_facet mgs $LCTL list_param mgs.*.ir_timeout ||
                 { skip "MGS without IR support"; return 0; }
 
-        combined_mgs_mds && skip "mgs and mds on the same target" && return 0
+	combined_mgs_mds && skip "needs separate mgs and mds" && return 0
 
         # workaround solution to generate config log on the mds
         remount_facet mds1
@@ -1565,10 +1912,9 @@ test_105()
         # get one of the clients from client list
         local rcli=$(echo $RCLIENTS |cut -d' ' -f 1)
 
-        local old_MOUNTOPT=$MOUNTOPT
-        MOUNTOPT=${MOUNTOPT},noir
+        local mount_opts=${MOUNT_OPTS:+$MOUNT_OPTS,}noir
         zconf_umount $rcli $MOUNT || error "umount failed"
-        zconf_mount $rcli $MOUNT || error "mount failed"
+        zconf_mount $rcli $MOUNT $mount_opts || error "mount failed"
 
         # make sure lustre mount at $rcli disabling IR
         local ir_state=$(check_cli_ir_state $rcli)
@@ -1578,7 +1924,7 @@ test_105()
 	# Since the client just mounted, its last_rcvd entry is not on disk.
 	# Send an RPC so exp_need_sync forces last_rcvd to commit this export
 	# so the client can reconnect during OST recovery (LU-924, LU-1582)
-	$SETSTRIPE -i 0 $DIR/$tfile
+	$LFS setstripe -i 0 $DIR/$tfile
 	dd if=/dev/zero of=$DIR/$tfile bs=1M count=1 conv=sync
 
         # make sure MGS's state is Partial
@@ -1590,8 +1936,7 @@ test_105()
 	[ $ir_state = "DISABLED" -o $ir_state = "OFF" ] ||
 		error "IR status on ost1 should be DISABLED"
 
-        # restore it
-        MOUNTOPT=$old_MOUNTOPT
+        # remount with the default MOUNT_OPTS
         zconf_umount $rcli $MOUNT || error "umount failed"
         zconf_mount $rcli $MOUNT || error "mount failed"
 
@@ -1615,8 +1960,8 @@ cleanup_106() {
 }
 
 test_106() { # LU-1789
-	[[ $(lustre_version_code $SINGLEMDS) -ge $(version_code 2.3.50) ]] ||
-		{ skip "Need MDS version at least 2.3.50"; return 0; }
+	[[ "$MDS1_VERSION" -ge $(version_code 2.3.50) ]] ||
+		skip "Need MDS version at least 2.3.50"
 
 #define OBD_FAIL_MDC_LIGHTWEIGHT         0x805
 	$LCTL set_param fail_loc=0x805
@@ -1635,17 +1980,16 @@ test_106() { # LU-1789
 	touch $DIR2/$tfile || error "failed to create empty file"
 	replay_barrier $SINGLEMDS
 
-	$LCTL set_param debug=console
+	$LCTL set_param debug=ha
 	$LCTL clear
 	facet_failover $SINGLEMDS
 
-	# lightweight connection must be evicted
+	# lightweight goes through LUSTRE_IMP_RECOVER during failover
 	touch -c $DIR2/$tfile || true
 	$LCTL dk $TMP/lustre-log-$TESTNAME.log
-	evicted=`awk '/This client was evicted by .*MDT0000/ {
-				      print;
-		      }' $TMP/lustre-log-$TESTNAME.log`
-	[ -z "$evicted" ] && error "lightweight client not evicted by mds"
+	recovered=$(awk '/MDT0000-mdc-[0-9a-f]*. lwp recover/ { print }' \
+		    $TMP/lustre-log-$TESTNAME.log)
+	[ -z "$recovered" ] && error "lightweight client was not recovered"
 
 	# and all operations performed by lightweight client should be
 	# synchronous, so the file created before mds restart should be there
@@ -1680,16 +2024,41 @@ test_107 () {
 }
 run_test 107 "drop reint reply, then restart MDT"
 
+test_108() {
+	mkdir -p $DIR/$tdir
+	$LFS setstripe -c 1 -i 0 $DIR/$tdir
+
+	dd if=/dev/zero of=$DIR/$tdir/$tfile bs=1M count=256 &
+	local dd_pid=$!
+	sleep 0.1
+
+	ost_evict_client
+
+	wait $dd_pid
+
+	client_up || error "reconnect failed"
+	rm -f $DIR/$tdir/$tfile
+}
+run_test 108 "client eviction don't crash"
+
 test_110a () {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return 0
 	local remote_dir=$DIR/$tdir/remote_dir
-	local MDTIDX=1
+	local mdtidx=1
+	local num
+
+	#prepare for 110 test, which need set striped dir on remote MDT.
+	for num in $(seq $MDSCOUNT); do
+		do_facet mds$num \
+			lctl set_param -n mdt.$FSNAME*.enable_remote_dir=1 \
+				2>/dev/null
+	done
 
 	mkdir -p $DIR/$tdir
-	drop_request "$LFS mkdir -i $MDTIDX $remote_dir" ||
-					error "lfs mkdir failed"
-	local diridx=$($GETSTRIPE -M $remote_dir)
-	[ $diridx -eq $MDTIDX ] || error "$diridx != $MDTIDX"
+	drop_request "$LFS mkdir -i $mdtidx -c2 $remote_dir" ||
+		error "lfs mkdir failed"
+	local diridx=$($LFS getstripe -m $remote_dir)
+	[ $diridx -eq $mdtidx ] || error "$diridx != $mdtidx"
 
 	rm -rf $DIR/$tdir || error "rmdir failed"
 }
@@ -1698,14 +2067,14 @@ run_test 110a "create remote directory: drop client req"
 test_110b () {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return 0
 	local remote_dir=$DIR/$tdir/remote_dir
-	local MDTIDX=1
+	local mdtidx=1
 
 	mkdir -p $DIR/$tdir
-	drop_reint_reply "$LFS mkdir -i $MDTIDX $remote_dir" ||
-					error "lfs mkdir failed"
+	drop_reint_reply "$LFS mkdir -i $mdtidx -c2 $remote_dir" ||
+		error "lfs mkdir failed"
 
-	diridx=$($GETSTRIPE -M $remote_dir)
-	[ $diridx -eq $MDTIDX ] || error "$diridx != $MDTIDX"
+	diridx=$($LFS getstripe -m $remote_dir)
+	[ $diridx -eq $mdtidx ] || error "$diridx != $mdtidx"
 
 	rm -rf $DIR/$tdir || error "rmdir failed"
 }
@@ -1714,14 +2083,14 @@ run_test 110b "create remote directory: drop Master rep"
 test_110c () {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return 0
 	local remote_dir=$DIR/$tdir/remote_dir
-	local MDTIDX=1
+	local mdtidx=1
 
 	mkdir -p $DIR/$tdir
-	drop_update_reply $MDTIDX "$LFS mkdir -i $MDTIDX $remote_dir" ||
-						error "lfs mkdir failed"
+	drop_update_reply $mdtidx "$LFS mkdir -i $mdtidx -c2 $remote_dir" ||
+		error "lfs mkdir failed"
 
-	diridx=$($GETSTRIPE -M $remote_dir)
-	[ $diridx -eq $MDTIDX ] || error "$diridx != $MDTIDX"
+	diridx=$($LFS getstripe -m $remote_dir)
+	[ $diridx -eq $mdtidx ] || error "$diridx != $mdtidx"
 
 	rm -rf $DIR/$tdir || error "rmdir failed"
 }
@@ -1733,7 +2102,7 @@ test_110d () {
 	local MDTIDX=1
 
 	mkdir -p $DIR/$tdir
-	$LFS mkdir -i $MDTIDX $remote_dir || error "lfs mkdir failed"
+	$LFS mkdir -i $MDTIDX -c2 $remote_dir || error "lfs mkdir failed"
 
 	drop_request "rm -rf $remote_dir" || error "rm remote dir failed"
 
@@ -1749,7 +2118,7 @@ test_110e () {
 	local MDTIDX=1
 
 	mkdir -p $DIR/$tdir
-	$LFS mkdir -i $MDTIDX $remote_dir  || error "lfs mkdir failed"
+	$LFS mkdir -i $MDTIDX -c2 $remote_dir  || error "lfs mkdir failed"
 	drop_reint_reply "rm -rf $remote_dir" || error "rm remote dir failed"
 
 	rm -rf $DIR/$tdir || error "rmdir failed"
@@ -1764,7 +2133,7 @@ test_110f () {
 	local MDTIDX=1
 
 	mkdir -p $DIR/$tdir
-	$LFS mkdir -i $MDTIDX $remote_dir || error "lfs mkdir failed"
+	$LFS mkdir -i $MDTIDX -c2 $remote_dir || error "lfs mkdir failed"
 	drop_update_reply $MDTIDX "rm -rf $remote_dir" ||
 					error "rm remote dir failed"
 
@@ -1772,19 +2141,183 @@ test_110f () {
 }
 run_test 110f "remove remote directory: drop slave rep"
 
+test_110g () {
+	[[ "$MDS1_VERSION" -ge $(version_code 2.11.0) ]] ||
+		skip "Need MDS version at least 2.11.0"
+
+	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs"
+
+	mkdir -p $DIR/$tdir
+	touch $DIR/$tdir/$tfile
+
+	# OBD_FAIL_MDS_REINT_NET_REP	0x119
+	do_facet mds1 $LCTL set_param fail_loc=0x119
+	$LFS migrate -m 1 $DIR/$tdir &
+	migrate_pid=$!
+	sleep 5
+	do_facet mds1 $LCTL set_param fail_loc=0
+	wait $migrate_pid
+
+	local mdt_index
+	mdt_index=$($LFS getstripe -m $DIR/$tdir)
+	[ $mdt_index == 1 ] || error "$tdir is not on MDT1"
+	mdt_index=$($LFS getstripe -m $DIR/$tdir/$tfile)
+	[ $mdt_index == 1 ] || error "$tfile is not on MDT1"
+
+	rm -rf $DIR/$tdir || error "rmdir failed"
+}
+run_test 110g "drop reply during migration"
+
+test_110h () {
+	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs"
+	[[ "$MDS1_VERSION" -ge $(version_code 2.7.56) ]] ||
+		skip "Need MDS version at least 2.7.56"
+
+	local src_dir=$DIR/$tdir/source_dir
+	local tgt_dir=$DIR/$tdir/target_dir
+	local MDTIDX=1
+
+	mkdir -p $src_dir
+	$LFS mkdir -i $MDTIDX $tgt_dir
+
+	dd if=/etc/hosts of=$src_dir/src_file
+	touch $tgt_dir/tgt_file
+	drop_update_reply $MDTIDX \
+		"mrename $src_dir/src_file $tgt_dir/tgt_file" ||
+		error "mrename failed"
+
+	$CHECKSTAT -t file $src_dir/src_file &&
+				error "src_file present after rename"
+
+	diff /etc/hosts $tgt_dir/tgt_file ||
+			error "file changed after rename"
+
+}
+run_test 110h "drop update reply during cross-MDT file rename"
+
+test_110i () {
+	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs"
+	[[ "$MDS1_VERSION" -ge $(version_code 2.7.56) ]] ||
+		skip "Need MDS version at least 2.7.56"
+
+	local src_dir=$DIR/$tdir/source_dir
+	local tgt_dir=$DIR/$tdir/target_dir
+	local MDTIDX=1
+
+	mkdir -p $src_dir
+	$LFS mkdir -i $MDTIDX $tgt_dir
+
+	mkdir $src_dir/src_dir
+	touch $src_dir/src_dir/a
+	mkdir $tgt_dir/tgt_dir
+	drop_update_reply $MDTIDX \
+		"mrename $src_dir/src_dir $tgt_dir/tgt_dir" ||
+		error "mrename failed"
+
+	$CHECKSTAT -t dir $src_dir/src_dir &&
+			error "src_dir present after rename"
+
+	$CHECKSTAT -t dir $tgt_dir/tgt_dir ||
+				error "tgt_dir not present after rename"
+
+	$CHECKSTAT -t file $tgt_dir/tgt_dir/a ||
+				error "a not present after rename"
+}
+run_test 110i "drop update reply during cross-MDT dir rename"
+
+test_110j () {
+	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs"
+	[[ "$MDS1_VERSION" -ge $(version_code 2.7.56) ]] ||
+		skip "Need MDS version at least 2.7.56"
+
+	local remote_dir=$DIR/$tdir/remote_dir
+	local local_dir=$DIR/$tdir/local_dir
+	local MDTIDX=1
+
+	mkdir -p $DIR/$tdir
+	mkdir $DIR/$tdir/local_dir
+	$LFS mkdir -i $MDTIDX $remote_dir
+
+	touch $local_dir/local_file
+	drop_update_reply $MDTIDX \
+		"ln $local_dir/local_file $remote_dir/remote_file" ||
+		error "ln failed"
+
+	$CHECKSTAT -t file $remote_dir/remote_file ||
+				error "remote not present after ln"
+}
+run_test 110j "drop update reply during cross-MDT ln"
+
+test_110k() {
+	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTS"
+	[[ "$MDS1_VERSION" -ge $(version_code 2.12.55) ]] ||
+		skip "Need MDS version at least 2.12.55"
+
+	umount $MOUNT
+	stop mds2 || error "stop mds2 failed"
+
+#define OBD_FAIL_FLD_QUERY_REQ 0x1103
+	do_facet mds2 lctl set_param fail_loc=0x1103
+	local OPTS="$MDS_MOUNT_OPTS -o abort_recovery"
+	start mds2 $(mdsdevname 2) $OPTS ||
+		error "start MDS with abort_recovery should succeed"
+	do_facet mds2 lctl set_param fail_loc=0
+
+	# cleanup
+	stop mds2 || error "cleanup: stop mds2 failed"
+	start mds2 $(mdsdevname 2) $MDS_MOUNT_OPTS ||
+		error "cleanup: start mds2 failed"
+	zconf_mount $(hostname) $MOUNT || error "cleanup: mount failed"
+	client_up || error "post-failover df failed"
+}
+run_test 110k "FID_QUERY failed during recovery"
+
+test_110m () {
+	(( $(lustre_version_code $SINGLEMDS) >= $(version_code 2.14.52) )) ||
+		skip "Need MDS version at least 2.14.52"
+	(( $MDSCOUNT >= 2 )) || skip "needs at least 2 MDTs"
+	local remote_dir=$DIR/$tdir/remote_dir
+	local mdccli
+	local uuid
+	local diridx
+
+	mkdir_on_mdt0 $DIR/$tdir
+
+#define OBD_FAIL_PTLRPC_RESEND_RACE 0x0525
+	do_facet mds1 $LCTL set_param fail_loc=0x80000525
+	$LFS mkdir -i 1 -c2 $remote_dir &
+	mkdir_pid=$!
+	sleep 3
+	# initiate the re-connect & re-send
+	mdccli=$(do_facet mds2 $LCTL dl |
+		awk '/MDT0000-osp-MDT0001/ {print $4;}')
+	uuid=$(do_facet mds2 $LCTL get_param -n osp.$mdccli.mdt_conn_uuid)
+	echo "conn_uuid=$uuid"
+	do_facet mds2 $LCTL set_param "osp.$mdccli.import=connection=$uuid"
+
+	wait $mkdir_pid
+	(( $? == 0 )) || error "mkdir failed"
+
+	diridx=$($LFS getstripe -m $remote_dir)
+	(( $diridx == 1 )) || error "$diridx != 1"
+	rm -rf $DIR/$tdir || error "rmdir failed"
+}
+run_test 110m "update resent vs original RPC race"
+
 # LU-2844 mdt prepare fail should not cause umount oops
 test_111 ()
 {
-	[[ $(lustre_version_code $SINGLEMDS) -ge $(version_code 2.3.62) ]] ||
-		{ skip "Need MDS version at least 2.3.62"; return 0; }
+	[[ "$MDS1_VERSION" -ge $(version_code 2.3.62) ]] ||
+		skip "Need MDS version at least 2.3.62"
 
-	local mdsdev=$(mdsdevname ${SINGLEMDS//mds/})
 #define OBD_FAIL_MDS_CHANGELOG_INIT 0x151
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x151
 	stop $SINGLEMDS || error "stop MDS failed"
-	start $SINGLEMDS $mdsdev && error "start MDS should fail"
+	start $SINGLEMDS $(mdsdevname ${SINGLEMDS//mds/}) $MDS_MOUNT_OPTS &&
+		error "start MDS should fail"
 	do_facet $SINGLEMDS lctl set_param fail_loc=0
-	start $SINGLEMDS $mdsdev || error "start MDS failed"
+	start $SINGLEMDS $(mdsdevname ${SINGLEMDS//mds/}) $MDS_MOUNT_OPTS ||
+		error "start MDS failed"
 }
 run_test 111 "mdd setup fail should not cause umount oops"
 
@@ -1808,6 +2341,880 @@ test_112a() {
 }
 run_test 112a "bulk resend while orignal request is in progress"
 
+test_115_read() {
+	local fail1=$1
+	local fail2=$2
+
+	df $DIR
+	dd if=/dev/zero of=$DIR/$tfile bs=4096 count=1
+	cancel_lru_locks osc
+
+	# OST_READ       =  3,
+	$LCTL set_param fail_loc=$fail1 fail_val=3
+	dd of=/dev/null if=$DIR/$tfile bs=4096 count=1 &
+	pid=$!
+	sleep 1
+
+	set_nodes_failloc "$(osts_nodes)" $fail2
+
+	wait $pid || error "dd failed"
+	return 0
+}
+
+test_115_write() {
+	local fail1=$1
+	local fail2=$2
+	local error=$3
+	local fail_val2=${4:-0}
+
+	df $DIR
+	touch $DIR/$tfile
+
+	# OST_WRITE      =  4,
+	$LCTL set_param fail_loc=$fail1 fail_val=4
+	dd if=/dev/zero of=$DIR/$tfile bs=4096 count=1 oflag=dsync &
+	pid=$!
+	sleep 1
+
+	df $MOUNT
+	set_nodes_failloc "$(osts_nodes)" $fail2 $fail_val2
+
+	wait $pid
+	rc=$?
+	[ $error -eq 0 ] && [ $rc -ne 0 ] && error "dd error ($rc)"
+	[ $error -ne 0 ] && [ $rc -eq 0 ] && error "dd success"
+	return 0
+}
+
+test_115a() {
+	[ "$OST1_VERSION" -lt $(version_code 2.8.50) ] &&
+		skip "need at least 2.8.50 on OST"
+
+	#define OBD_FAIL_PTLRPC_LONG_REQ_UNLINK  0x51b
+	#define OBD_FAIL_PTLRPC_DROP_BULK	 0x51a
+	test_115_read 0x8000051b 0x8000051a
+}
+run_test 115a "read: late REQ MDunlink and no bulk"
+
+test_115b() {
+	[ "$OST1_VERSION" -lt $(version_code 2.8.50) ] &&
+		skip "need at least 2.8.50 on OST"
+
+	#define OBD_FAIL_PTLRPC_LONG_REQ_UNLINK  0x51b
+	#define OBD_FAIL_OST_ENOSPC              0x215
+
+	# pass $OSTCOUNT for the fail_loc to be caught
+	# appropriately by the IO thread
+	test_115_write 0x8000051b 0x80000215 1 $OSTCOUNT
+}
+run_test 115b "write: late REQ MDunlink and no bulk"
+
+test_115c() {
+	[ "$OST1_VERSION" -lt $(version_code 2.8.50) ] &&
+		skip "need at least 2.8.50 on OST"
+
+	#define OBD_FAIL_PTLRPC_LONG_REPL_UNLINK 0x50f
+	#define OBD_FAIL_PTLRPC_DROP_BULK	 0x51a
+	test_115_read 0x8000050f 0x8000051a
+}
+run_test 115c "read: late Reply MDunlink and no bulk"
+
+test_115d() {
+	[ "$OST1_VERSION" -lt $(version_code 2.8.50) ] &&
+		skip "need at least 2.8.50 on OST"
+
+	#define OBD_FAIL_PTLRPC_LONG_REPL_UNLINK 0x50f
+	#define OBD_FAIL_OST_ENOSPC              0x215
+	test_115_write 0x8000050f 0x80000215 0
+}
+run_test 115d "write: late Reply MDunlink and no bulk"
+
+test_115e() {
+	[ "$OST1_VERSION" -lt $(version_code 2.8.50) ] &&
+		skip "need at least 2.8.50 on OST"
+
+	#define OBD_FAIL_PTLRPC_LONG_BULK_UNLINK 0x510
+	#define OBD_FAIL_OST_ALL_REPLY_NET       0x211
+	test_115_read 0x80000510 0x80000211
+}
+run_test 115e "read: late Bulk MDunlink and no reply"
+
+test_115f() {
+	[ "$OST1_VERSION" -lt $(version_code 2.8.50) ] &&
+		skip "need at least 2.8.50 on OST"
+
+	#define OBD_FAIL_PTLRPC_LONG_REQ_UNLINK  0x51b
+	#define OBD_FAIL_OST_ALL_REPLY_NET       0x211
+	test_115_read 0x8000051b 0x80000211
+}
+run_test 115f "read: late REQ MDunlink and no reply"
+
+test_115g() {
+	[ "$OST1_VERSION" -lt $(version_code 2.8.50) ] &&
+		skip "need at least 2.8.50 on OST"
+
+	#define OBD_FAIL_PTLRPC_LONG_BOTH_UNLINK 0x51c
+	test_115_read 0x8000051c 0
+}
+run_test 115g "read: late REQ MDunlink and Reply MDunlink"
+
+# parameters: fail_loc CMD RC
+test_120_reply() {
+	local PID
+	local PID2
+	local rc=5
+	local fail
+
+	#define OBD_FAIL_LDLM_CP_CB_WAIT2	0x320
+	#define OBD_FAIL_LDLM_CP_CB_WAIT3	0x321
+	#define OBD_FAIL_LDLM_CP_CB_WAIT4	0x322
+	#define OBD_FAIL_LDLM_CP_CB_WAIT5	0x323
+
+	echo
+	echo -n "** FLOCK REPLY vs. EVICTION race, lock $2"
+	[ "$1" = "CLEANUP" ] &&
+		fail=0x80000320 && echo ", $1 cp first"
+	[ "$1" = "REPLY" ] &&
+		fail=0x80000321 && echo ", $1 cp first"
+	[ "$1" = "DEADLOCK CLEANUP" ] &&
+		fail=0x80000322 && echo " DEADLOCK, CLEANUP cp first"
+	[ "$1" = "DEADLOCK REPLY" ] &&
+		fail=0x80000323 && echo " DEADLOCK, REPLY cp first"
+
+	if [ x"$2" = x"get" ]; then
+		#for TEST lock, take a conflict in advance
+		# sleep longer than evictor to not confuse fail_loc: 2+2+4
+		echo "** Taking conflict **"
+		flocks_test 5 set read sleep 10 $DIR/$tfile &
+		PID2=$!
+
+		sleep 2
+	fi
+
+	$LCTL set_param fail_loc=$fail
+
+	flocks_test 5 $2 write $DIR/$tfile &
+	PID=$!
+
+	sleep 2
+	echo "** Evicting and re-connecting client **"
+	mds_evict_client
+
+	client_reconnect
+
+	if [ x"$2" = x"get" ]; then
+		wait $PID2
+	fi
+
+	wait $PID
+	rc=$?
+
+	# check if the return value is allowed
+	[ $rc -eq $3 ] && rc=0
+
+	$LCTL set_param fail_loc=0
+	return $rc
+}
+
+# a lock is taken, unlock vs. cleanup_resource() race for destroying
+# the ORIGINAL lock.
+test_120_destroy()
+{
+	local PID
+
+	flocks_test 5 set write sleep 4 $DIR/$tfile &
+	PID=$!
+	sleep 2
+
+	# let unlock to sleep in CP CB
+	$LCTL set_param fail_loc=$1
+	sleep 4
+
+	# let cleanup to cleep in CP CB
+	mds_evict_client
+
+	client_reconnect
+
+	wait $PID
+	rc=$?
+
+	$LCTL set_param fail_loc=0
+	return $rc
+}
+
+test_120() {
+	flock_is_enabled || { skip "mount w/o flock enabled" && return; }
+	touch $DIR/$tfile
+
+	test_120_reply "CLEANUP" set 5 || error "SET race failed"
+	test_120_reply "CLEANUP" get 5 || error "GET race failed"
+	test_120_reply "CLEANUP" unlock 5 || error "UNLOCK race failed"
+
+	test_120_reply "REPLY" set 5 || error "SET race failed"
+	test_120_reply "REPLY" get 5 || error "GET race failed"
+	test_120_reply "REPLY" unlock 5 || error "UNLOCK race failed"
+
+	# DEADLOCK tests
+	test_120_reply "DEADLOCK CLEANUP" set 5 || error "DEADLOCK race failed"
+	test_120_reply "DEADLOCK REPLY" set 35 || error "DEADLOCK race failed"
+
+	test_120_destroy 0x320 || error "unlock-cleanup race failed"
+}
+run_test 120 "flock race: completion vs. evict"
+
+test_113() {
+	local BEFORE=$(date +%s)
+	local EVICT
+
+	# modify dir so that next revalidate would not obtain UPDATE lock
+	touch $DIR
+
+	# drop 1 reply with UPDATE lock,
+	# resend should not create 2nd lock on server
+	mcreate $DIR/$tfile || error "mcreate failed: $?"
+	drop_mdt_ldlm_reply_once "stat $DIR/$tfile" || error "stat failed: $?"
+
+	# 2 BL AST will be sent to client, both must find the same lock,
+	# race them to not get EINVAL for 2nd BL AST
+	#define OBD_FAIL_LDLM_PAUSE_CANCEL2      0x31f
+	$LCTL set_param fail_loc=0x8000031f
+
+	$LCTL set_param ldlm.namespaces.*.early_lock_cancel=0 > /dev/null
+	chmod 0777 $DIR/$tfile || error "chmod failed: $?"
+	$LCTL set_param ldlm.namespaces.*.early_lock_cancel=1 > /dev/null
+
+	# let the client reconnect
+	client_reconnect
+	EVICT=$($LCTL get_param mdc.$FSNAME-MDT*.state |
+	  awk -F"[ [,]" '/EVICTED ]$/ { if (mx<$5) {mx=$5;} } END { print mx }')
+
+	[ -z "$EVICT" ] || [[ $EVICT -le $BEFORE ]] || error "eviction happened"
+}
+run_test 113 "ldlm enqueue dropped reply should not cause deadlocks"
+
+T130_PID=0
+test_130_base() {
+	test_mkdir -p $DIR/$tdir
+
+	# Prevent interference from layout intent RPCs due to
+	# asynchronous writeback. These will be tested in 130c below.
+	do_nodes ${CLIENTS:-$HOSTNAME} sync
+
+	# get only LOOKUP lock on $tdir
+	cancel_lru_locks mdc
+	ls $DIR/$tdir/$tfile 2>/dev/null
+
+	# get getattr by fid on $tdir
+	#
+	# we need to race with unlink, unlink must complete before we will
+	# take a DLM lock, otherwise unlink will wait until getattr will
+	# complete; but later than getattr starts so that getattr found
+	# the object
+#define OBD_FAIL_MDS_INTENT_DELAY		0x160
+	set_nodes_failloc "$(mdts_nodes)" 0x80000160
+	stat $DIR/$tdir &
+	T130_PID=$!
+	sleep 2
+
+	rm -rf $DIR/$tdir
+
+	# drop the reply so that resend happens on an unlinked file.
+#define OBD_FAIL_MDS_LDLM_REPLY_NET	 0x157
+	set_nodes_failloc "$(mdts_nodes)" 0x80000157
+}
+
+test_130a() {
+	remote_mds_nodsh && skip "remote MDS with nodsh"
+	[[ "$MDS1_VERSION" -ge $(version_code 2.7.2) ]] ||
+		skip "Need server version newer than 2.7.1"
+
+	test_130_base
+
+	wait $T130_PID || [ $? -eq 0 ] && error "stat should fail"
+	return 0
+}
+run_test 130a "enqueue resend on not existing file"
+
+test_130b() {
+	remote_mds_nodsh && skip "remote MDS with nodsh"
+	[[ "$MDS1_VERSION" -ge $(version_code 2.7.2) ]] ||
+		skip "Need server version newer than 2.7.1"
+
+	test_130_base
+	# let the reply to be dropped
+	sleep 10
+
+#define OBD_FAIL_SRV_ENOENT              0x217
+	set_nodes_failloc "$(mdts_nodes)" 0x80000217
+
+	wait $T130_PID || [ $? -eq 0 ] && error "stat should fail"
+	return 0
+}
+run_test 130b "enqueue resend on a stale inode"
+
+test_130c() {
+	remote_mds_nodsh && skip "remote MDS with nodsh" && return
+
+	do_nodes ${CLIENTS:-$HOSTNAME} sync
+	echo XXX > $DIR/$tfile
+
+	cancel_lru_locks mdc
+
+	# Trigger writeback on $tfile.
+	#
+	# we need to race with unlink, unlink must complete before we will
+	# take a DLM lock, otherwise unlink will wait until intent will
+	# complete; but later than intent starts so that intent found
+	# the object
+#define OBD_FAIL_MDS_INTENT_DELAY		0x160
+	set_nodes_failloc "$(mdts_nodes)" 0x80000160
+	sync &
+	T130_PID=$!
+	sleep 2
+
+	rm $DIR/$tfile
+
+	# drop the reply so that resend happens on an unlinked file.
+#define OBD_FAIL_MDS_LDLM_REPLY_NET	 0x157
+	set_nodes_failloc "$(mdts_nodes)" 0x80000157
+
+	# let the reply to be dropped
+	sleep 10
+
+#define OBD_FAIL_SRV_ENOENT              0x217
+	set_nodes_failloc "$(mdts_nodes)" 0x80000217
+
+	wait $T130_PID
+
+	return 0
+}
+run_test 130c "layout intent resend on a stale inode"
+
+test_132() {
+	local before=$(date +%s)
+	local evict
+
+	mount_client $MOUNT2 || error "mount filed"
+
+	rm -f $DIR/$tfile
+	# get a lock on client so that export would reach the stale list
+	$LFS setstripe -i 0 $DIR/$tfile || error "setstripe failed"
+	dd if=/dev/zero of=$DIR/$tfile bs=4096 count=1 conv=fsync ||
+		error "dd failed"
+
+	#define OBD_FAIL_OST_PAUSE_PUNCH         0x236
+	do_facet ost1 $LCTL set_param fail_val=120 fail_loc=0x80000236
+
+	$TRUNCATE $DIR/$tfile 100 &
+
+	sleep 1
+	dd if=/dev/zero of=$DIR2/$tfile bs=4096 count=1 conv=notrunc ||
+		error "dd failed"
+
+	wait
+	umount_client $MOUNT2
+
+	evict=$(do_facet client $LCTL get_param \
+		osc.$FSNAME-OST0000-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-OST0000-osc-*/state;
+		    error "eviction happened: $evict before:$before")
+}
+run_test 132 "long punch"
+
+test_131() {
+	remote_ost_nodsh && skip "remote OST with nodsh" && return 0
+
+	rm -f $DIR/$tfile
+	# get a lock on client so that export would reach the stale list
+	$LFS setstripe -i 0 $DIR/$tfile || error "setstripe failed"
+	dd if=/dev/zero of=$DIR/$tfile count=1 || error "dd failed"
+
+	# another IO under the same lock
+	#define OBD_FAIL_OSC_DELAY_IO            0x414
+	$LCTL set_param fail_loc=0x80000414
+	$LCTL set_param fail_val=4 fail_loc=0x80000414
+	dd if=/dev/zero of=$DIR/$tfile count=1 conv=notrunc oflag=dsync &
+	local pid=$!
+	sleep 1
+
+	#define OBD_FAIL_LDLM_BL_EVICT           0x31e
+	set_nodes_failloc "$(osts_nodes)" 0x8000031e
+	ost_evict_client
+	client_reconnect
+
+	wait $pid && error "dd succeeded"
+	return 0
+}
+run_test 131 "IO vs evict results to IO under staled lock"
+
+test_133() {
+	local list=$(comma_list $(mdts_nodes))
+
+	local t=$((TIMEOUT * 2))
+	touch $DIR/$tfile
+
+	flock $DIR/$tfile -c "echo bl lock;sleep $t;echo bl flock unlocked" &
+	sleep 1
+	multiop_bg_pause $DIR/$tfile O_jc || return 1
+	PID=$!
+
+	#define OBD_FAIL_MDS_LDLM_REPLY_NET 0x157
+	do_nodes $list $LCTL set_param fail_loc=0x80000157
+	kill -USR1 $PID
+	echo "waiting for multiop $PID"
+	wait $PID || return 2
+
+	rm -f $DIR/$tfile
+
+	return 0
+}
+run_test 133 "don't fail on flock resend"
+
+test_134() {
+	[ -z "$CLIENTS" ] && skip "Need two or more clients" && return
+	[ $CLIENTCOUNT -lt 2 ] &&
+		{ skip "Need 2+ clients, have $CLIENTCOUNT" && return; }
+
+	mkdir -p $MOUNT/$tdir/1 $MOUNT/$tdir/2 || error "mkdir failed"
+	touch $MOUNT/$tdir/1/$tfile $MOUNT/$tdir/2/$tfile ||
+		error "touch failed"
+	zconf_umount_clients $CLIENTS $MOUNT
+	zconf_mount_clients $CLIENTS $MOUNT
+
+#define OBD_FAIL_TGT_REPLY_DATA_RACE    0x722
+	# assume commit interval is 5
+	do_facet mds1 "$LCTL set_param fail_loc=0x722 fail_val=5"
+
+	local -a clients=(${CLIENTS//,/ })
+	local client1=${clients[0]}
+	local client2=${clients[1]}
+
+	do_node $client1 rm $MOUNT/$tdir/1/$tfile &
+	rmpid=$!
+	do_node $client2 mv $MOUNT/$tdir/2/$tfile $MOUNT/$tdir/2/${tfile}_2 &
+	mvpid=$!
+	fail mds1
+	wait $rmpid || error "rm failed"
+	wait $mvpid || error "mv failed"
+	return 0
+}
+run_test 134 "race between failover and search for reply data free slot"
+
+test_135() {
+	[ "$MDS1_VERSION" -lt $(version_code 2.12.51) ] &&
+		skip "Need MDS version at least 2.12.51"
+
+	mkdir -p $DIR/$tdir
+	$LFS setstripe -E 1M -L mdt $DIR/$tdir
+	# to have parent dir write lock before open/resend
+	touch $DIR/$tdir/$tfile
+	#define OBD_FAIL_MDS_LDLM_REPLY_NET 0x157
+	do_nodes $(comma_list $(mdts_nodes)) $LCTL set_param fail_loc=0x80000157
+	openfile -f O_RDWR:O_CREAT -m 0755 $DIR/$tdir/$tfile ||
+		error "Failed to open DOM file"
+}
+run_test 135 "DOM: open/create resend to return size"
+
+test_136() {
+	remote_mds_nodsh && skip "remote MDS with nodsh"
+	[[ "$MDS1_VERSION" -ge $(version_code 2.12.52) ]] ||
+		skip "Need MDS version at least 2.12.52"
+
+	local mdts=$(comma_list $(mdts_nodes))
+	local MDT0=$(facet_svc $SINGLEMDS)
+
+	local clog=$(do_facet mds1 $LCTL --device $MDT0 changelog_register -n)
+	[ -n "$clog" ] || error "changelog_register failed"
+	cl_mask=$(do_facet mds1 $LCTL get_param \
+				mdd.$MDT0.changelog_mask -n)
+	changelog_chmask "ALL"
+
+	# generate some changelog records to accumulate
+	test_mkdir -i 0 -c 0 $DIR/$tdir || error "mkdir $tdir failed"
+	createmany -m $DIR/$tdir/$tfile 10000 ||
+		error "create $DIR/$tdir/$tfile failed"
+
+	local size1=$(do_facet $SINGLEMDS \
+		      $LCTL get_param -n mdd.$MDT0.changelog_size)
+	echo "Changelog size $size1"
+
+	#define OBD_FAIL_LLOG_PURGE_DELAY		    0x1318
+	do_nodes $mdts $LCTL set_param fail_loc=0x1318 fail_val=30
+
+	# launch changelog_deregister in background on MDS
+	do_facet mds1 "nohup $LCTL --device $MDT0 changelog_deregister $clog \
+			> foo.out 2> foo.err < /dev/null &"
+	# give time to reach fail_loc
+	sleep 15
+
+	# fail_loc will make MDS sleep in the middle of changelog_deregister
+	# take this opportunity to abruptly kill MDS
+	FAILURE_MODE_save=$FAILURE_MODE
+	FAILURE_MODE=HARD
+	fail mds1
+	FAILURE_MODE=$FAILURE_MODE_save
+
+	do_nodes $mdts $LCTL set_param fail_loc=0x0 fail_val=0
+
+	local size2=$(do_facet $SINGLEMDS \
+		      $LCTL get_param -n mdd.$MDT0.changelog_size)
+	echo "Changelog size $size2"
+	local clog2=$(do_facet $SINGLEMDS "$LCTL get_param -n \
+			mdd.$MDT0.changelog_users | grep $clog")
+	echo "After crash, changelog user $clog2"
+
+	[ -n "$clog2" -o $size2 -lt $size1 ] ||
+		error "changelog record count unchanged"
+
+	do_facet mds1 $LCTL set_param mdd.$MDT0.changelog_mask=\'$cl_mask\' -n
+}
+run_test 136 "changelog_deregister leaving pending records"
+
+test_137() {
+	df $DIR
+	mkdir -p $DIR/d1
+	mkdir -p $DIR/d2
+	dd if=/dev/zero of=$DIR/d1/$tfile bs=4096 count=1
+	dd if=/dev/zero of=$DIR/d2/$tfile bs=4096 count=1
+	cancel_lru_locks osc
+
+	#define OBD_FAIL_PTLRPC_RESEND_RACE	 0x525
+	do_facet $SINGLEMDS "lctl set_param fail_loc=0x80000525"
+
+	# RPC1: any reply is to be delayed to disable last_xid logic
+	ln $DIR/d1/$tfile $DIR/d1/f2 &
+	sleep 1
+
+	# RPC2: setattr1 reply is delayed & resent
+	# original reply comes to client; the resend get asleep
+	chmod 666 $DIR/d2/$tfile
+
+	# RPC3: setattr2 on the same file; run ahead of RPC2 resend
+	chmod 777 $DIR/d2/$tfile
+
+	# RPC2 resend wakes up
+	sleep 5
+	[ $(stat -c "%a" $DIR/d2/$tfile) == 777 ] || error "resend got applied"
+}
+run_test 137 "late resend must be skipped if already applied"
+
+test_138() {
+	remote_mds_nodsh && skip "remote MDS with nodsh"
+	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return 0
+	[[ "$MDS1_VERSION" -ge $(version_code 2.12.59) ]] ||
+		skip "Need server version newer than 2.12.59"
+
+	zconf_umount_clients $CLIENTS $MOUNT
+
+#define OBD_FAIL_TGT_RECOVERY_CONNECT 0x724
+	#delay a first step of recovey when MDS waiting clients
+	#and failing to get osp logs
+	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x724 fail_val=5
+
+	facet_failover $SINGLEMDS
+
+	#waiting failover and recovery timer
+	#the valuse is based on target_recovery_overseer() wait_event timeout
+	sleep 55
+	stop $SINGLEMDS || error "stop MDS failed"
+	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
+	start $SINGLEMDS $(mdsdevname ${SINGLEMDS//mds/}) $MDS_MOUNT_OPTS ||
+		error "start MDS failed"
+	zconf_mount_clients $CLIENTS $MOUNT
+}
+run_test 138 "Umount MDT during recovery"
+
+test_139() {
+	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return 0
+	[ $MDS1_VERSION -lt $(version_code 2.13.50) ] &&
+		skip "Need MDS version at least 2.13.50"
+
+	mdt_dev=$(mdsdevname 1)
+
+	stop $SINGLEMDS || error "stop $SINGLEMDS failed"
+
+#define OBD_FAIL_OSP_INVALID_LOGID		0x2106
+	do_facet $SINGLEMDS $LCTL set_param fail_val=0x68 fail_loc=0x80002106
+	start $SINGLEMDS $mdt_dev $MDS_MOUNT_OPTS || error "Fail to start MDT"
+}
+run_test 139 "corrupted catid won't cause crash"
+
+test_140a() {
+	[ $MDS1_VERSION -lt $(version_code 2.12.58) ] &&
+		skip "Need MDS version at least 2.13.50"
+
+	[ "$SHARED_KEY" = true ] &&
+		skip "server local client incompatible with SSK keys installed"
+
+	slr=$(do_facet mds1 \
+		$LCTL get_param -n mdt.$FSNAME-MDT0000.local_recovery)
+	stack_trap "do_facet mds1 $LCTL set_param \
+		mdt.*.local_recovery=$slr" EXIT
+
+	# disable recovery for local clients
+	# so local clients should be marked with no_recovery flag
+	do_facet mds1 $LCTL set_param mdt.*.local_recovery=0
+	mount_mds_client
+
+	local cnt
+	cnt=$(do_facet mds1 $LCTL get_param "mdt.*MDT0000.exports.*.export" |
+		grep export_flags.*no_recovery | wc -l)
+	echo "$cnt clients with recovery disabled"
+	umount_mds_client
+	[ $cnt -eq 0 ] && error "no clients with recovery disabled"
+
+	# enable recovery for local clients
+	# so no local clients should be marked with no_recovery flag
+	do_facet mds1 $LCTL set_param mdt.*.local_recovery=1
+	mount_mds_client
+
+	cnt=$(do_facet mds1 $LCTL get_param "mdt.*MDT0000.exports.*.export" |
+		grep export_flags.*no_recovery | wc -l)
+	echo "$cnt clients with recovery disabled"
+	umount_mds_client
+	[ $cnt -eq 0 ] || error "$cnt clients with recovery disabled"
+}
+run_test 140a "local mount is flagged properly"
+
+test_140b() {
+	[ $MDS1_VERSION -lt $(version_code 2.12.58) ] &&
+		skip "Need MDS version at least 2.13.50"
+
+	[ "$SHARED_KEY" = true ] &&
+		skip "server local client incompatible with SSK keys installed"
+
+	slr=$(do_facet mds1 \
+		$LCTL get_param -n mdt.$FSNAME-MDT0000.local_recovery)
+	stack_trap "do_facet mds1 $LCTL set_param \
+		mdt.*.local_recovery=$slr" EXIT
+
+	# disable recovery for local clients
+	do_facet mds1 $LCTL set_param mdt.*.local_recovery=0
+
+	mount_mds_client
+	replay_barrier mds1
+	umount_mds_client
+	fail mds1
+	# Lustre: tfs-MDT0000: Recovery over after 0:03, of 2 clients 2 rec...
+	local recovery=$(do_facet mds1 dmesg |
+			 awk '/Recovery over after/ { print $6 }' | tail -1 |
+			 awk -F: '{ print $1 * 60 + $2 }')
+	(( recovery < TIMEOUT * 2 + 5 )) ||
+		error "recovery took too long $recovery > $((TIMEOUT * 2 + 5))"
+}
+run_test 140b "local mount is excluded from recovery"
+
+test_141() {
+	local oldc
+	local newc
+
+	[ $PARALLEL == "yes" ] && skip "skip parallel run"
+	combined_mgs_mds || skip "needs combined MGS/MDT"
+	( local_mode || from_build_tree ) &&
+		skip "cannot run in local mode or from build tree"
+
+	# some get_param have a bug to handle dot in param name
+	do_rpc_nodes $(facet_active_host $SINGLEMDS) cancel_lru_locks MGC
+	oldc=$(do_facet $SINGLEMDS $LCTL get_param -n \
+		'ldlm.namespaces.MGC*.lock_count')
+	fail $SINGLEMDS
+	do_rpc_nodes $(facet_active_host $SINGLEMDS) cancel_lru_locks MGC
+	newc=$(do_facet $SINGLEMDS $LCTL get_param -n \
+		'ldlm.namespaces.MGC*.lock_count')
+
+	[ $oldc -eq $newc ] || error "mgc lost locks ($oldc != $newc)"
+	return 0
+}
+run_test 141 "do not lose locks on MGS restart"
+
+test_142() {
+	[ $MDS1_VERSION -lt $(version_code 2.11.56) ] &&
+		skip "Need MDS version at least 2.11.56"
+
+	#define OBD_FAIL_MDS_ORPHAN_DELETE	0x165
+	do_facet mds1 $LCTL set_param fail_loc=0x165
+	$MULTIOP $DIR/$tfile Ouc || error "multiop failed"
+
+	stop mds1
+	start mds1 $(mdsdevname 1) $MDS_MOUNT_OPTS
+
+	wait_update_facet mds1 "pgrep orph_.*-MDD | wc -l" "0" ||
+		error "MDD orphan cleanup thread not quit"
+}
+run_test 142 "orphan name stub can be cleaned up in startup"
+
+test_143() {
+	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.13.00) ] &&
+		skip "Need MDS version at least 2.13.00"
+	[ $PARALLEL == "yes" ] && skip "skip parallel run"
+
+	local mntpt=$(facet_mntpt $SINGLEMDS)
+	stop mds1
+	mount_fstype $SINGLEMDS || error "mount as fstype $SINGLEMDS failed"
+	do_facet $SINGLEMDS touch $mntpt/PENDING/$tfile
+	unmount_fstype $SINGLEMDS
+	start mds1 $(mdsdevname 1) $MDS_MOUNT_OPTS || error "mds1 start fail"
+
+	wait_recovery_complete $SINGLEMDS || error "MDS recovery not done"
+	wait_update_facet mds1 "pgrep orph_.*-MDD | wc -l" "0" ||
+		error "MDD orphan cleanup thread not quit"
+}
+run_test 143 "orphan cleanup thread shouldn't be blocked even delete failed"
+
+test_145() {
+	[ $MDSCOUNT -lt 3 ] && skip "needs >= 3 MDTs"
+	[ $(facet_active_host mds2) = $(facet_active_host mds3) ] &&
+		skip "needs mds2 and mds3 on separate nodes"
+
+	replay_barrier mds1
+
+	touch $DIR/$tfile
+
+#define OBD_FAIL_PTLRPC_DELAY_RECOV      0x507
+	echo block mds_connect from mds2
+	do_facet mds2 "$LCTL set_param fail_loc=0x507"
+
+#define OBD_FAIL_OUT_UPDATE_DROP	0x1707
+	echo block recovery updates from mds3
+	do_facet mds3 "$LCTL set_param fail_loc=0x1707"
+
+	local hard_timeout=\
+$(do_facet mds1 $LCTL get_param -n mdt.$FSNAME-MDT0000.recovery_time_hard)
+
+	fail mds1 &
+
+	local get_soft_timeout_cmd=\
+"$LCTL get_param -n mdt.$FSNAME-MDT0000.recovery_time_soft 2>/dev/null"
+
+	echo wait until mds1 recovery_time_soft is $hard_timeout
+	wait_update $(facet_host mds1) "$get_soft_timeout_cmd" \
+"$hard_timeout" $hard_timeout
+
+	echo unblock mds_connect from mds2
+	do_facet mds2 "$LCTL set_param fail_loc=0"
+
+	echo upblock recovery updates from mds3
+	do_facet mds3 "$LCTL set_param fail_loc=0"
+
+	wait
+	[ -f $DIR/$tfile ] || error "$DIR/$tfile does not exist"
+}
+run_test 145 "connect mdtlovs and process update logs after recovery expire"
+
+test_147() {
+	local obd_timeout=200
+	local old=$($LCTL get_param -n timeout)
+	local f=$DIR/$tfile
+	local connection_count
+
+	$LFS setstripe -i 0 -c 1 $f
+	stripe_index=$($LFS getstripe -i $f)
+	if [ $stripe_index -ne 0 ]; then
+	       $LFS getstripe $f
+	       error "$f: stripe_index $stripe_index != 0" && return
+	fi
+
+	$LCTL set_param timeout=$obd_timeout
+	stack_trap "$LCTL set_param timeout=$old && client_reconnect" EXIT
+
+	# OBD_FAIL_OST_CONNECT_NET2
+	# lost reply to connect request
+	do_facet ost1 lctl set_param fail_loc=0x00000225 timeout=$obd_timeout
+	stack_trap "do_facet ost1 $LCTL set_param fail_loc=0 timeout=$old" EXIT
+
+
+	ost_evict_client
+	# force reconnect
+	$LFS df $MOUNT > /dev/null 2>&1 &
+	sleep $((obd_timeout * 3 / 4))
+
+	$LCTL get_param osc.$FSNAME-OST0000-osc-*.state
+	connection_count=$($LCTL get_param osc.$FSNAME-OST0000-osc-*.state |
+			   tac |  sed "/FULL/,$ d" | grep CONNECTING | wc -l)
+
+	echo $connection_count
+	(($connection_count >= 6)) || error "Client reconnected too slow"
+}
+run_test 147 "Check client reconnect"
+
+test_148() {
+	local wce_param="obdfilter.$FSNAME-OST0000.writethrough_cache_enable"
+	local p="$TMP/$TESTSUITE-$TESTNAME.parameters"
+	local amc=$(at_max_get client)
+	local amo=$(at_max_get ost1)
+	local timeout
+
+	at_max_set 0 client
+	at_max_set 0 ost1
+	timeout=$(request_timeout client)
+
+	[ "$(facet_fstype ost1)" = "ldiskfs" ] && {
+		# save old r/o cache settings
+		save_lustre_params ost1 $wce_param > $p
+
+		# disable r/o cache
+		do_facet ost1 "$LCTL set_param -n $wce_param=0"
+	}
+
+	$LFS setstripe -i 0 -c 1 $DIR/$tfile
+	dd if=/dev/zero of=$DIR/$tfile bs=4096 count=1 oflag=direct
+	cp $DIR/$tfile $TMP/$tfile
+	#define OBD_FAIL_OST_BRW_PAUSE_BULK2     0x227
+	do_facet ost1 $LCTL set_param fail_loc=0x80000227
+	do_facet ost1 $LCTL set_param fail_val=$((timeout+2))
+	dd if=/dev/urandom of=$DIR/$tfile bs=4096 count=1 conv=notrunc,fdatasync
+	dd if=/dev/zero of=$DIR/$tfile bs=4096 count=1 conv=notrunc,fdatasync
+	sleep 2
+	cancel_lru_locks osc
+	cmp -b $DIR/$tfile $TMP/$tfile || error "wrong data"
+
+	rm -f $DIR/$tfile $TMP/$tfile
+
+	at_max_set $amc client
+	at_max_set $amo ost1
+
+	[ "$(facet_fstype ost1)" = "ldiskfs" ] && {
+		# restore initial r/o cache settings
+		restore_lustre_params < $p
+	}
+
+	return 0
+}
+run_test 148 "data corruption through resend"
+
+test_149() {
+	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs"
+
+	test_mkdir -i 0 -c $MDSCOUNT $DIR/$tdir || error "mkdir $tdir failed"
+
+	# make an orphan striped dir
+	$MULTIOP $DIR/$tdir D_c &
+	local PID=$!
+	sleep 0.3
+	rmdir $DIR/$tdir || error "can't rmdir"
+
+	# stop a slave MDT where one ons stripe is located
+	stop mds2 -f
+
+	# stopping should not cause orphan as another MDT can
+	# be stopped yet
+	stop mds1 -f
+
+	start mds1 $(mdsdevname 1) $MDS_MOUNT_OPTS || error "mds1 start fail"
+	start mds2 $(mdsdevname 2) $MDS_MOUNT_OPTS || error "mds1 start fail"
+
+	kill -USR1 $PID
+	wait $PID
+
+	clients_up
+	return 0
+}
+run_test 149 "skip orphan removal at umount"
+
 complete $SECONDS
 check_and_cleanup_lustre
 exit_status