X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Ftests%2Fconf-sanity.sh;h=b2317840d11512fc49fafe6c60014beeaba19cbb;hp=1100c02a3af255d5a96da062569dc97c837714d0;hb=8438f2a7b56fd97aa2207aac375a880df668a61d;hpb=34f94efa4847ebd84b2fa42b7a0fc85bd7f6f8e3

diff --git a/lustre/tests/conf-sanity.sh b/lustre/tests/conf-sanity.sh
index 1100c02..b231784 100644
--- a/lustre/tests/conf-sanity.sh
+++ b/lustre/tests/conf-sanity.sh
@@ -78,8 +78,8 @@ if [[ "$LDISKFS_MKFS_OPTS" != *lazy_itable_init* ]]; then
 fi
 
 [ $(facet_fstype $SINGLEMDS) = "zfs" ] &&
-# bug number for skipped test:        LU-2778 LU-4444
-	ALWAYS_EXCEPT="$ALWAYS_EXCEPT 57b     69"
+# bug number for skipped test:        LU-4444
+	ALWAYS_EXCEPT="$ALWAYS_EXCEPT 69"
 
 init_logging
 
@@ -213,16 +213,17 @@ remount_client() {
 }
 
 umount_client() {
-	local MOUNTPATH=$1
-	echo "umount lustre on ${MOUNTPATH}....."
-	zconf_umount $(hostname) $MOUNTPATH || return 97
+	local mountpath=$1
+	shift
+	echo "umount lustre on $mountpath....."
+	zconf_umount $HOSTNAME $mountpath $@ || return 97
 }
 
 manual_umount_client(){
 	local rc
 	local FORCE=$1
 	echo "manual umount lustre on ${MOUNT}...."
-	do_facet client "umount -d ${FORCE} $MOUNT"
+	do_facet client "umount ${FORCE} $MOUNT"
 	rc=$?
 	return $rc
 }
@@ -344,7 +345,8 @@ test_4() {
 	setup
 	touch $DIR/$tfile || error "touch $DIR/$tfile failed"
 	stop_ost || error "Unable to stop OST1"
-	cleanup
+	umount_client $MOUNT -f || error “unmount $MOUNT failed”
+	cleanup_nocli
 	eno=$?
 	# ok for ost to fail shutdown
 	if [ 202 -ne $eno ] && [ 0 -ne $eno ]; then
@@ -363,7 +365,7 @@ test_5a() {	# was test_5
 	# cleanup may return an error from the failed
 	# disconnects; for now I'll consider this successful
 	# if all the modules have unloaded.
-	umount -d $MOUNT &
+	$UMOUNT -f $MOUNT &
 	UMOUNT_PID=$!
 	sleep 6
 	echo "killing umount"
@@ -458,7 +460,8 @@ test_5d() {
 	start_mds || error "MDS start failed"
 	stop_ost || error "Unable to stop OST1"
 	mount_client $MOUNT || error "mount_client $MOUNT failed"
-	cleanup || error "cleanup_nocli failed with $?"
+	umount_client $MOUNT -f || error "umount_client $MOUNT failed"
+	cleanup_nocli || error "cleanup_nocli failed with $?"
 	grep " $MOUNT " /etc/mtab &&
 		error "$MOUNT entry in mtab after unmount"
 	pass
@@ -841,7 +844,7 @@ test_22() {
 	# check_mount will block trying to contact ost
 	mcreate $DIR/$tfile || error "mcreate $DIR/$tfile failed"
 	rm -f $DIR/$tfile || error "remove $DIR/$tfile failed"
-	umount_client $MOUNT
+	umount_client $MOUNT -f
 	pass
 
 	echo "Client mount with a running ost"
@@ -1274,30 +1277,35 @@ run_test 30a "Big config llog and conf_param deletion"
 test_30b() {
 	setup
 
+	local orignids=$($LCTL get_param -n \
+		osc.$FSNAME-OST0000-osc-[^M]*.import | grep failover_nids)
+
+	local orignidcount=$(echo "$orignids" | wc -w)
+
 	# Make a fake nid.  Use the OST nid, and add 20 to the least significant
 	# numerical part of it. Hopefully that's not already a failover address
 	# for the server.
-	OSTNID=$(do_facet ost1 "$LCTL get_param nis" | tail -1 | awk '{print $1}')
-	ORIGVAL=$(echo $OSTNID | egrep -oi "[0-9]*@")
-	NEWVAL=$((($(echo $ORIGVAL | egrep -oi "[0-9]*") + 20) % 256))
-	NEW=$(echo $OSTNID | sed "s/$ORIGVAL/$NEWVAL@/")
+	local OSTNID=$(do_facet ost1 "$LCTL get_param nis" | tail -1 | \
+		awk '{print $1}')
+	local ORIGVAL=$(echo $OSTNID | egrep -oi "[0-9]*@")
+	local NEWVAL=$((($(echo $ORIGVAL | egrep -oi "[0-9]*") + 20) % 256))
+	local NEW=$(echo $OSTNID | sed "s/$ORIGVAL/$NEWVAL@/")
 	echo "Using fake nid $NEW"
 
-	TEST="$LCTL get_param -n osc.$FSNAME-OST0000-osc-[^M]*.import |
+	local TEST="$LCTL get_param -n osc.$FSNAME-OST0000-osc-[^M]*.import |
 		grep failover_nids | sed -n 's/.*\($NEW\).*/\1/p'"
 	set_conf_param_and_check client "$TEST" \
 		"$FSNAME-OST0000.failover.node" $NEW ||
 		error "didn't add failover nid $NEW"
-	NIDS=$($LCTL get_param -n osc.$FSNAME-OST0000-osc-[^M]*.import |
+	local NIDS=$($LCTL get_param -n osc.$FSNAME-OST0000-osc-[^M]*.import |
 		grep failover_nids)
 	echo $NIDS
-	# The NIDS value is the failover nid strings and "[" and "]". So
-	# we need to subtract the space taken by the delimiters. This has
-	# changed from earlier version of Lustre but this test is run only
-	# locally so this change will not break interop. See LU-3386
-	NIDCOUNT=$(($(echo "$NIDS" | wc -w) - 3))
-	echo "should have 2 failover nids: $NIDCOUNT"
-	[ $NIDCOUNT -eq 2 ] || error "Failover nid not added"
+	local NIDCOUNT=$(echo "$NIDS" | wc -w)
+	echo "should have $((orignidcount + 1)) entries \
+		in failover nids string, have $NIDCOUNT"
+	[ $NIDCOUNT -eq $((orignidcount + 1)) ] ||
+		error "Failover nid not added"
+
 	do_facet mgs "$LCTL conf_param -d $FSNAME-OST0000.failover.node" ||
 		error "conf_param delete failed"
 	umount_client $MOUNT
@@ -1306,9 +1314,10 @@ test_30b() {
 	NIDS=$($LCTL get_param -n osc.$FSNAME-OST0000-osc-[^M]*.import |
 		grep failover_nids)
 	echo $NIDS
-	NIDCOUNT=$(($(echo "$NIDS" | wc -w) - 3))
-	echo "only 1 final nid should remain: $NIDCOUNT"
-	[ $NIDCOUNT -eq 1 ] || error "Failover nids not removed"
+	NIDCOUNT=$(echo "$NIDS" | wc -w)
+	echo "only $orignidcount final entries should remain \
+		in failover nids string, have $NIDCOUNT"
+	[ $NIDCOUNT -eq $orignidcount ] || error "Failover nids not removed"
 
 	cleanup || error "cleanup failed with rc $?"
 }
@@ -1341,12 +1350,13 @@ test_32newtarball() {
 	local src=/etc/rc.d
 	local tmp=$TMP/t32_image_create
 
-	if [ $FSNAME != t32fs -o $MDSCOUNT -ne 1 -o								\
-		 \( -z "$MDSDEV" -a -z "$MDSDEV1" \) -o $OSTCOUNT -ne 1 -o			\
-		 -z "$OSTDEV1" ]; then
-		error "Needs FSNAME=t32fs MDSCOUNT=1 MDSDEV1=<nonexistent_file>"	\
-			  "(or MDSDEV, in the case of b1_8) OSTCOUNT=1"					\
-			  "OSTDEV1=<nonexistent_file>"
+	if [ $FSNAME != t32fs -o \( -z "$MDSDEV" -a -z "$MDSDEV1" \) -o	\
+	     $OSTCOUNT -ne 1 -o	-z "$OSTDEV1" ]; then
+		error "Needs FSNAME=t32fs MDSCOUNT=2 "			\
+		      "MDSDEV1=<nonexistent_file>"			\
+		      "MDSDEV2=<nonexistent_file>"			\
+		      "(or MDSDEV, in the case of b1_8)"		\
+		      "OSTCOUNT=1 OSTDEV1=<nonexistent_file>"
 	fi
 
 	mkdir $tmp || {
@@ -1379,7 +1389,7 @@ test_32newtarball() {
 	setupall
 	pushd /mnt/$FSNAME
 	ls -Rni --time-style=+%s >$tmp/img/list
-	find . ! -name .lustre -type f -exec sha1sum {} \; |
+	find ! -name .lustre -type f -exec sha1sum {} \; |
 		sort -k 2 >$tmp/img/sha1sums
 	popd
 	$LCTL get_param -n version | head -n 1 |
@@ -1397,6 +1407,11 @@ test_32newtarball() {
 		{ if (NF == 1) { getline } else { num++ } ; print $num;} }' \
 		| tr -d "*" > $tmp/img/ispace
 
+	if [ $MDSCOUNT -ge 2 ]; then
+		$LFS mkdir -i 1 /mnt/$FSNAME/remote_dir
+		tar cf - -C $tmp/src . | tar xf - -C /mnt/$FSNAME/remote_dir
+	fi
+
 	stopall
 
 	pushd $tmp/src
@@ -1411,6 +1426,10 @@ test_32newtarball() {
 	uname -m >$tmp/img/arch
 
 	mv ${MDSDEV1:-$MDSDEV} $tmp/img
+	for num in $(seq 2 $MDSCOUNT); do
+		local devname=$(mdsdevname $num)
+		mv $devname $tmp/img
+	done
 	mv $OSTDEV1 $tmp/img
 
 	version=$(sed -e 's/\(^[0-9]\+\.[0-9]\+\)\(.*$\)/\1/' $tmp/img/commit |
@@ -1461,13 +1480,13 @@ t32_test_cleanup() {
 		umount $tmp/mnt/lustre || rc=$?
 	fi
 	if $shall_cleanup_mdt; then
-		$r umount -d $tmp/mnt/mdt || rc=$?
+		$r $UMOUNT $tmp/mnt/mdt || rc=$?
 	fi
 	if $shall_cleanup_mdt1; then
-		$r umount -d $tmp/mnt/mdt1 || rc=$?
+		$r $UMOUNT $tmp/mnt/mdt1 || rc=$?
 	fi
 	if $shall_cleanup_ost; then
-		$r umount -d $tmp/mnt/ost || rc=$?
+		$r $UMOUNT $tmp/mnt/ost || rc=$?
 	fi
 
 	$r rm -rf $tmp
@@ -1639,13 +1658,16 @@ t32_test() {
 	local list
 	local fstype=$(facet_fstype $SINGLEMDS)
 	local mdt_dev=$tmp/mdt
+	local mdt2_dev=$tmp/mdt2
 	local ost_dev=$tmp/ost
+	local stripe_index
+	local dir
 
 	trap 'trap - RETURN; t32_test_cleanup' RETURN
 
 	load_modules
 	mkdir -p $tmp/mnt/lustre || error "mkdir $tmp/mnt/lustre failed"
-	$r mkdir -p $tmp/mnt/{mdt,ost}
+	$r mkdir -p $tmp/mnt/{mdt,mdt1,ost}
 	$r tar xjvf $tarball -S -C $tmp || {
 		error_noexit "Unpacking the disk image tarball"
 		return 1
@@ -1689,6 +1711,15 @@ t32_test() {
 		error_noexit "tunefs.lustre before mounting the MDT"
 		return 1
 	}
+
+	if $r test -f $mdt2_dev; then
+		$r $TUNEFS --dryrun $mdt2_dev || {
+			$r losetup -a
+			error_noexit "tunefs.lustre before mounting the MDT"
+			return 1
+		}
+	fi
+
 	if [ "$writeconf" ]; then
 		mopts=writeconf
 		if [ $fstype == "ldiskfs" ]; then
@@ -1698,6 +1729,13 @@ t32_test() {
 				error_noexit "Enable mdt quota feature"
 				return 1
 			}
+			if $r test -f $mdt2_dev; then
+				$r $TUNEFS --quota $mdt2_dev || {
+					$r losetup -a
+					error_noexit "Enable mdt quota feature"
+					return 1
+				}
+			fi
 		fi
 	else
 		if [ -n "$($LCTL list_nids | grep -v '\(tcp\|lo\)[[:digit:]]*$')" ]; then
@@ -1715,7 +1753,7 @@ t32_test() {
 			$r $MOUNT_CMD -o $mopts $mdt_dev $tmp/mnt/mdt
 			$r $LCTL replace_nids $fsname-OST0000 $ostnid
 			$r $LCTL replace_nids $fsname-MDT0000 $nid
-			$r umount -d $tmp/mnt/mdt
+			$r $UMOUNT $tmp/mnt/mdt
 		fi
 
 		mopts=exclude=$fsname-OST0000
@@ -1733,7 +1771,20 @@ t32_test() {
 	}
 	shall_cleanup_mdt=true
 
-	if [ "$dne_upgrade" != "no" ]; then
+	if $r test -f $mdt2_dev; then
+		mopts=mgsnode=$nid,$mopts
+		$r $MOUNT_CMD -o $mopts $mdt2_dev $tmp/mnt/mdt1 || {
+			$r losetup -a
+			error_noexit "Mounting the MDT"
+			return 1
+		}
+
+		echo "mount new MDT....$mdt2_dev"
+		$r $LCTL set_param -n mdt.${fsname}*.enable_remote_dir=1 ||
+			error_noexit "enable remote dir create failed"
+
+		shall_cleanup_mdt1=true
+	elif [ "$dne_upgrade" != "no" ]; then
 		local fs2mdsdev=$(mdsdevname 1_2)
 		local fs2mdsvdev=$(mdsvdevname 1_2)
 
@@ -1754,7 +1805,6 @@ t32_test() {
 		}
 
 		echo "mount new MDT....$fs2mdsdev"
-		$r mkdir -p $tmp/mnt/mdt1
 		$r $MOUNT_CMD -o $mopts $fs2mdsdev $tmp/mnt/mdt1 || {
 			error_noexit "mount mdt1 failed"
 			return 1
@@ -1877,7 +1927,6 @@ t32_test() {
 			error_noexit "Setting MDT1 \"lov.stripesize\""
 			return 1
 		}
-
 	fi
 
 	if [ "$writeconf" ]; then
@@ -1885,8 +1934,9 @@ t32_test() {
 			error_noexit "Mounting the client"
 			return 1
 		}
+
 		shall_cleanup_lustre=true
-		$LCTL set_param debug="$PTLDEBUG"
+		$r $LCTL set_param debug="$PTLDEBUG"
 
 		t32_verify_quota $node $fsname $tmp/mnt/lustre || {
 			error_noexit "verify quota failed"
@@ -1894,22 +1944,39 @@ t32_test() {
 		}
 
 		if [ "$dne_upgrade" != "no" ]; then
-			$LFS mkdir -i 1 -c2 $tmp/mnt/lustre/remote_dir || {
+			$LFS mkdir -i 1 -c2 $tmp/mnt/lustre/striped_dir || {
 				error_noexit "set remote dir failed"
 				return 1
 			}
 
-			$LFS setdirstripe -D -c2 $tmp/mnt/lustre/remote_dir
+			$LFS setdirstripe -D -c2 $tmp/mnt/lustre/striped_dir
 
 			pushd $tmp/mnt/lustre
-			tar -cf - . --exclude=./remote_dir |
-				tar -xvf - -C remote_dir 1>/dev/null || {
+			tar -cf - . --exclude=./striped_dir \
+				    --exclude=./remote_dir |
+				tar -xvf - -C striped_dir 1>/dev/null || {
 				error_noexit "cp to remote dir failed"
 				return 1
 			}
 			popd
 		fi
 
+		# If it is upgrade from DNE (2.5), then rename the remote dir,
+		# which is created in 2.5 to striped dir.
+		if $r test -f $mdt2_dev; then
+			stripe_index=$(LFS getdirstripe -i	\
+				       $tmp/mnt/lustre/remote_dir)
+			[ $stripe_index -eq 1 ] || {
+				error_noexit "get index $striped_index failed"
+				return 1
+			}
+			mv $tmp/mnt/lustre/remote_dir	\
+				$tmp/mnt/lustre/striped_dir/ || {
+				error_noexit "mv failed"
+				return 1
+			}
+		fi
+
 		dd if=/dev/zero of=$tmp/mnt/lustre/tmp_file bs=10k count=10 || {
 			error_noexit "dd failed"
 			return 1
@@ -1924,13 +1991,15 @@ t32_test() {
 			# is identical
 			$r cat $tmp/sha1sums | sort -k 2 >$tmp/sha1sums.orig
 			if [ "$dne_upgrade" != "no" ]; then
-				pushd $tmp/mnt/lustre/remote_dir
+				pushd $tmp/mnt/lustre/striped_dir
 			else
 				pushd $tmp/mnt/lustre
 			fi
 
-			find ! -name .lustre -type f -exec sha1sum {} \; |
+			find ! -path "*remote_dir*" ! -name .lustre -type f \
+					-exec sha1sum {} \; |
 				sort -k 2 >$tmp/sha1sums || {
+				popd
 				error_noexit "sha1sum"
 				return 1
 			}
@@ -1939,12 +2008,30 @@ t32_test() {
 				error_noexit "sha1sum verification failed"
 				return 1
 			fi
+
+			# if upgrade from DNE (2.5), then check remote directory
+			if $r test -f $mdt2_dev; then
+				pushd $tmp/mnt/lustre/striped_dir/remote_dir
+				find ! -name .lustre -type f	\
+							-exec sha1sum {} \; |
+					sort -k 2 >$tmp/sha1sums || {
+					popd
+					error_noexit "sha1sum"
+					return 1
+				}
+				popd
+				if ! diff -ub $tmp/sha1sums.orig \
+					      $tmp/sha1sums; then
+					error_noexit "sha1sum dne failed"
+					return 1
+				fi
+			fi
 		else
 			echo "sha1sum verification skipped"
 		fi
 
 		if [ "$dne_upgrade" != "no" ]; then
-			rm -rf $tmp/mnt/lustre/remote_dir || {
+			rm -rf $tmp/mnt/lustre/striped_dir || {
 				error_noexit "remove remote dir failed"
 				return 1
 			}
@@ -1986,6 +2073,40 @@ t32_test() {
 			echo "list verification skipped"
 		fi
 
+		# migrate files/dirs to remote MDT, then move them back
+		if [ $(lustre_version_code mds1) -ge $(version_code 2.7.50) -a \
+		     $dne_upgrade != "no" ]; then
+			$r $LCTL set_param -n	\
+				mdt.${fsname}*.enable_remote_dir=1 2>/dev/null
+
+			echo "test migration"
+			pushd $tmp/mnt/lustre
+			for dir in $(find ! -name .lustre ! -name . -type d); do
+				mdt_index=$($LFS getdirstripe -i $dir)
+				stripe_cnt=$($LFS getdirstripe -c $dir)
+				if [ $mdt_index = 0 -a $stripe_cnt -le 1 ]; then
+					$LFS mv -M 1 $dir || {
+					popd
+					error_noexit "migrate MDT1 failed"
+					return 1
+				}
+				fi
+			done
+
+			for dir in $(find ! -name . ! -name .lustre -type d); do
+				mdt_index=$($LFS getdirstripe -i $dir)
+				stripe_cnt=$($LFS getdirstripe -c $dir)
+				if [ $mdt_index = 1 -a $stripe_cnt -le 1 ]; then
+					$LFS mv -M 0 $dir || {
+					popd
+					error_noexit "migrate MDT0 failed"
+					return 1
+				}
+				fi
+			done
+			popd
+		fi
+
 		#
 		# When adding new data verification tests, please check for
 		# the presence of the required reference files first, like
@@ -2016,20 +2137,20 @@ t32_test() {
 		shall_cleanup_lustre=false
 	else
 		if [ "$dne_upgrade" != "no" ]; then
-			$r umount -d $tmp/mnt/mdt1 || {
+			$r $UMOUNT $tmp/mnt/mdt1 || {
 				error_noexit "Unmounting the MDT2"
 				return 1
 			}
 			shall_cleanup_mdt1=false
 		fi
 
-		$r umount -d $tmp/mnt/mdt || {
+		$r $UMOUNT $tmp/mnt/mdt || {
 			error_noexit "Unmounting the MDT"
 			return 1
 		}
 		shall_cleanup_mdt=false
 
-		$r umount -d $tmp/mnt/ost || {
+		$r $UMOUNT $tmp/mnt/ost || {
 			error_noexit "Unmounting the OST"
 			return 1
 		}
@@ -2096,6 +2217,7 @@ test_32c() {
 		# Do not support 1_8 and 2_1 direct upgrade to DNE2 anymore */
 		echo $tarball | grep "1_8" && continue
 		echo $tarball | grep "2_1" && continue
+		load_modules
 		dne_upgrade=yes t32_test $tarball writeconf || rc=$?
 	done
 	return $rc
@@ -2156,7 +2278,7 @@ test_33a() { # bug 12333, was test_33
 	cp /etc/hosts $MOUNT2/ || error "copy /etc/hosts $MOUNT2/ failed"
 	$GETSTRIPE $MOUNT2/hosts || error "$GETSTRIPE $MOUNT2/hosts failed"
 
-	umount -d $MOUNT2
+	umount $MOUNT2
 	stop fs2ost -f
 	stop fs2mds -f
 	cleanup_nocli || error "cleanup_nocli failed with $?"
@@ -2421,7 +2543,7 @@ test_36() { # 12743
                 rc=3
        fi
 
-	umount -d $MOUNT2
+	$UMOUNT $MOUNT2
 	stop fs3ost -f || error "unable to stop OST3"
 	stop fs2ost -f || error "unable to stop OST2"
 	stop fs2mds -f || error "unable to stop second MDS"
@@ -2459,7 +2581,7 @@ test_37() {
 
 	echo mount_op=$mount_op
 
-	do_facet $SINGLEMDS "umount -d $mntpt && rm -f $mdsdev_sym"
+	do_facet $SINGLEMDS "$UMOUNT $mntpt && rm -f $mdsdev_sym"
 
 	if $(echo $mount_op | grep -q "unable to set tunable"); then
 		error "set tunables failed for symlink device"
@@ -2872,7 +2994,7 @@ test_43() {
 	#   root should be able to access root file after that
 	#
 	local NIDLIST=$($LCTL list_nids all | tr '\n' ' ')
-	NIDLIST="2@elan $NIDLIST 192.168.0.[2,10]@tcp"
+	NIDLIST="2@gni $NIDLIST 192.168.0.[2,10]@tcp"
 	NIDLIST=$(echo $NIDLIST | tr -s ' ' ' ')
 	set_conf_param_and_check mds					\
 		"$LCTL get_param -n mdt.$FSNAME-MDT0000.nosquash_nids"	\
@@ -3309,7 +3431,7 @@ test_50f() {
 	    stop_ost2 || error "Unable to stop OST2"
 	fi
 
-	umount_client $MOUNT || error "Unable to unmount client"
+	umount_client $MOUNT -f || error "Unable to unmount client"
 	stop_ost || error "Unable to stop OST1"
 	stop_mds || error "Unable to stop MDS"
 	#writeconf to remove all ost2 traces for subsequent tests
@@ -3385,6 +3507,57 @@ test_50h() {
 }
 run_test 50h "LU-642: activate deactivated OST"
 
+test_50i() {
+	# prepare MDT/OST, make OSC inactive for OST1
+	[ "$MDSCOUNT" -lt "2" ] && skip_env "$MDSCOUNT < 2, skipping" && return
+
+	[ $(facet_fstype ost1) == zfs ] && import_zpool ost1
+	load_modules
+	do_facet mds2 "$TUNEFS --param mdc.active=0 $(mdsdevname 2)" ||
+		error "tunefs MDT2 failed"
+	start_mds  || error "Unable to start MDT"
+	start_ost  || error "Unable to start OST1"
+	start_ost2 || error "Unable to start OST2"
+	mount_client $MOUNT || error "client start failed"
+
+	mkdir $DIR/$tdir || error "mkdir $DIR/$tdir failed"
+
+	$LCTL conf_param ${FSNAME}-MDT0000.mdc.active=0 &&
+		error "deactive MDC0 succeeds"
+	# activate MDC for MDT2
+	local TEST="$LCTL get_param -n mdc.${FSNAME}-MDT0001-mdc-[!M]*.active"
+	set_conf_param_and_check client					\
+		"$TEST" "${FSNAME}-MDT0001.mdc.active" 1 ||
+		error "Unable to activate MDT2"
+
+	wait_clients_import_state ${CLIENTS:-$HOSTNAME} mds2 FULL
+	if [ $(lustre_version_code $SINGLEMDS) -ge $(version_code 2.7.60) ]
+	then
+		wait_dne_interconnect
+	fi
+	$LFS mkdir -i1 $DIR/$tdir/2 || error "mkdir $DIR/$tdir/2 failed"
+	# create some file
+	createmany -o $DIR/$tdir/2/$tfile-%d 1 || error "create files failed"
+
+	rm -rf $DIR/$tdir/2 || error "unlink dir failed"
+
+	# deactivate MDC for MDT2
+	local TEST="$LCTL get_param -n mdc.${FSNAME}-MDT0001-mdc-[!M]*.active"
+	set_conf_param_and_check client					\
+		"$TEST" "${FSNAME}-MDT0001.mdc.active" 0 ||
+		error "Unable to deactivate MDT2"
+
+	$LFS mkdir -i1 $DIR/$tdir/2 &&
+		error "mkdir $DIR/$tdir/2 succeeds after deactive MDT"
+
+	# cleanup
+	umount_client $MOUNT || error "Unable to umount client"
+	stop_mds
+	stop_ost
+	stop_ost 2
+}
+run_test 50i "activate deactivated MDT"
+
 test_51() {
 	local LOCAL_TIMEOUT=20
 
@@ -3403,7 +3576,8 @@ test_51() {
 	start_ost2 || error "Unable to start OST1"
 	wait $pid
 	stop_ost2 || error "Unable to stop OST1"
-	cleanup || error "cleanup failed with $?"
+	umount_client $MOUNT -f || error “unmount $MOUNT failed”
+	cleanup_nocli || error “stop server failed”
 	#writeconf to remove all ost2 traces for subsequent tests
 	writeconf_or_reformat
 }
@@ -3761,8 +3935,7 @@ test_56() {
 	MDSJOURNALSIZE=16
 
 	for num in $(seq 1 $MDSCOUNT); do
-		add mds${num} $(mkfs_opts mds${num} $(mdsdevname $num)) \
-			--reformat $(mdsdevname $num) $(mdsvdevname $num)
+		reformat_mdt $num
 	done
 	add ost1 $(mkfs_opts ost1 $(ostdevname 1)) --index=10000 --reformat \
 		$(ostdevname 1) $(ostvdevname 1)
@@ -3914,20 +4087,19 @@ test_60() { # LU-471
 run_test 60 "check mkfs.lustre --mkfsoptions -E -O options setting"
 
 test_61() { # LU-80
-	local reformat=false
+	local lxattr=false
 
 	[ $(lustre_version_code $SINGLEMDS) -ge $(version_code 2.1.53) ] ||
 		{ skip "Need MDS version at least 2.1.53"; return 0; }
 
 	if [ $(facet_fstype $SINGLEMDS) == ldiskfs ] &&
-	   ! large_xattr_enabled; then
-		reformat=true
-		LDISKFS_MKFS_OPTS+=" -O large_xattr"
+	     ! large_xattr_enabled; then
+		lxattr=true
 
 		for num in $(seq $MDSCOUNT); do
-			add mds${num} $(mkfs_opts mds$num $(mdsdevname $num)) \
-			--reformat $(mdsdevname $num) $(mdsvdevname $num) ||
-			error "add mds $num failed"
+			do_facet mds${num} $TUNE2FS -O large_xattr \
+				$(mdsdevname $num) ||
+				error "tune2fs on mds $num failed"
 		done
 	fi
 
@@ -3940,45 +4112,59 @@ test_61() { # LU-80
 	local large_value="$(generate_string $(max_xattr_size))"
 	local small_value="bar"
 
-    local name="trusted.big"
-    log "save large xattr $name on $file"
-    setfattr -n $name -v $large_value $file ||
-        error "saving $name on $file failed"
-
-    local new_value=$(get_xattr_value $name $file)
-    [[ "$new_value" != "$large_value" ]] &&
-        error "$name different after saving"
-
-    log "shrink value of $name on $file"
-    setfattr -n $name -v $small_value $file ||
-        error "shrinking value of $name on $file failed"
-
-    new_value=$(get_xattr_value $name $file)
-    [[ "$new_value" != "$small_value" ]] &&
-        error "$name different after shrinking"
-
-    log "grow value of $name on $file"
-    setfattr -n $name -v $large_value $file ||
-        error "growing value of $name on $file failed"
-
-    new_value=$(get_xattr_value $name $file)
-    [[ "$new_value" != "$large_value" ]] &&
-        error "$name different after growing"
-
-    log "check value of $name on $file after remounting MDS"
-    fail $SINGLEMDS
-    new_value=$(get_xattr_value $name $file)
-    [[ "$new_value" != "$large_value" ]] &&
-        error "$name different after remounting MDS"
-
-    log "remove large xattr $name from $file"
-    setfattr -x $name $file || error "removing $name from $file failed"
-
-    rm -f $file
-    stopall
-	if $reformat; then
-		LDISKFS_MKFS_OPTS=${LDISKFS_MKFS_OPTS% -O large_xattr}
-		reformat
+	local name="trusted.big"
+	log "save large xattr $name on $file"
+	setfattr -n $name -v $large_value $file ||
+		error "saving $name on $file failed"
+
+	local new_value=$(get_xattr_value $name $file)
+	[[ "$new_value" != "$large_value" ]] &&
+		error "$name different after saving"
+
+	log "shrink value of $name on $file"
+	setfattr -n $name -v $small_value $file ||
+		error "shrinking value of $name on $file failed"
+
+	new_value=$(get_xattr_value $name $file)
+	[[ "$new_value" != "$small_value" ]] &&
+		error "$name different after shrinking"
+
+	log "grow value of $name on $file"
+	setfattr -n $name -v $large_value $file ||
+		error "growing value of $name on $file failed"
+
+	new_value=$(get_xattr_value $name $file)
+	[[ "$new_value" != "$large_value" ]] &&
+		error "$name different after growing"
+
+	log "check value of $name on $file after remounting MDS"
+	fail $SINGLEMDS
+	new_value=$(get_xattr_value $name $file)
+	[[ "$new_value" != "$large_value" ]] &&
+		error "$name different after remounting MDS"
+
+	log "remove large xattr $name from $file"
+	setfattr -x $name $file || error "removing $name from $file failed"
+
+	if $lxattr; then
+		stopall || error "stopping for e2fsck run"
+		for num in $(seq $MDSCOUNT); do
+			run_e2fsck $(facet_active_host mds$num) \
+				$(mdsdevname $num) "-y" ||
+				error "e2fsck MDT$num failed"
+		done
+		setup_noconfig || error "remounting the filesystem failed"
+	fi
+
+	# need to delete this file to avoid problems in other tests
+	rm -f $file
+	stopall || error "stopping systems to turn off large_xattr"
+	if $lxattr; then
+		for num in $(seq $MDSCOUNT); do
+			do_facet mds${num} $TUNE2FS -O ^large_xattr \
+				$(mdsdevname $num) ||
+				error "tune2fs on mds $num failed"
+		done
 	fi
 }
 run_test 61 "large xattr"
@@ -3997,10 +4183,10 @@ test_62() {
 		{ skip "Need MDS version at least 2.2.51"; return 0; }
 
 	echo "disable journal for mds"
-	do_facet mds tune2fs -O ^has_journal $mdsdev || error "tune2fs failed"
+	do_facet mds $TUNE2FS -O ^has_journal $mdsdev || error "tune2fs failed"
 	start_mds && error "MDT start should fail"
 	echo "disable journal for ost"
-	do_facet ost1 tune2fs -O ^has_journal $ostdev || error "tune2fs failed"
+	do_facet ost1 $TUNE2FS -O ^has_journal $ostdev || error "tune2fs failed"
 	start_ost && error "OST start should fail"
 	cleanup || error "cleanup failed with rc $?"
 	reformat_and_config
@@ -4035,7 +4221,8 @@ test_64() {
 	stop_ost2 || error "Unable to stop second ost"
 	echo "$LFS df"
 	$LFS df --lazy || error "lfs df failed"
-	cleanup || error "cleanup failed with $?"
+	umount_client $MOUNT -f || error “unmount $MOUNT failed”
+	cleanup_nocli || error "cleanup_nocli failed with $?"
 	#writeconf to remove all ost2 traces for subsequent tests
 	writeconf_or_reformat
 }
@@ -4070,7 +4257,7 @@ test_65() { # LU-2237
 	do_facet $SINGLEMDS \
 		"mount -t $(facet_fstype $SINGLEMDS) $opts $devname $brpt"
 	do_facet $SINGLEMDS "rm -f ${brpt}/last_rcvd"
-	do_facet $SINGLEMDS "umount -d $brpt"
+	do_facet $SINGLEMDS "$UMOUNT $brpt"
 
 	# restart MDS, the "last_rcvd" file should be recreated.
 	start_mds || error "fail to restart the MDS"
@@ -4255,6 +4442,10 @@ test_68() {
 }
 run_test 68 "be able to reserve specific sequences in FLDB"
 
+# Test 69: is about the total number of objects ever created on an OST.
+# so that when it is reformatted the normal MDS->OST orphan recovery won't
+# just "precreate" the missing objects. In the past it might try to recreate
+# millions of objects after an OST was reformatted
 test_69() {
 	local server_version=$(lustre_version_code $SINGLEMDS)
 
@@ -4266,25 +4457,50 @@ test_69() {
 		skip "Need MDS version at least 2.5.0" && return
 
 	setup
+	mkdir $DIR/$tdir || error "mkdir $DIR/$tdir failed"
 
 	# use OST0000 since it probably has the most creations
 	local OSTNAME=$(ostname_from_index 0)
 	local mdtosc_proc1=$(get_mdtosc_proc_path mds1 $OSTNAME)
+	local last_id=$(do_facet mds1 $LCTL get_param -n \
+			osc.$mdtosc_proc1.prealloc_last_id)
 
-	# Want to have OST LAST_ID over 1.5 * OST_MAX_PRECREATE to
-	# verify that the LAST_ID recovery is working properly.  If
+	# Want to have OST LAST_ID over 5 * OST_MAX_PRECREATE to
+	# verify that the LAST_ID recovery is working properly. If
 	# not, then the OST will refuse to allow the MDS connect
 	# because the LAST_ID value is too different from the MDS
 	#define OST_MAX_PRECREATE=20000
-	local num_create=$((20000 * 3))
+	local ost_max_pre=20000
+	local num_create=$(( ost_max_pre * 5 + 1 - last_id))
+
+	# If the LAST_ID is already over 5 * OST_MAX_PRECREATE, we don't
+	# need to create any files. So, skip this section.
+	if [ $num_create -gt 0 ]; then
+		# Check the number of inodes available on OST0
+		local files=0
+		local ifree=$($LFS df -i $MOUNT | awk '/OST0000/ { print $4 }')
+		log "On OST0, $ifree inodes available. Want $num_create."
+
+		$SETSTRIPE -i 0 $DIR/$tdir ||
+			error "$SETSTRIPE -i 0 $DIR/$tdir failed"
+		if [ $ifree -lt 10000 ]; then
+			files=$(( ifree - 50 ))
+		else
+			files=10000
+		fi
+
+		local j=$((num_create / files + 1))
+		for i in $(seq 1 $j); do
+			createmany -o $DIR/$tdir/$tfile-$i- $files ||
+				error "createmany fail create $files files: $?"
+			unlinkmany $DIR/$tdir/$tfile-$i- $files ||
+				error "unlinkmany failed unlink $files files"
+		done
+	fi
 
-	mkdir $DIR/$tdir || error "mkdir $DIR/$tdir failed"
-	$SETSTRIPE -i 0 $DIR/$tdir || error "$SETSTRIPE -i 0 $DIR/$tdir failed"
-	createmany -o $DIR/$tdir/$tfile- $num_create ||
-		error "createmany: failed to create $num_create files: $?"
 	# delete all of the files with objects on OST0 so the
 	# filesystem is not inconsistent later on
-	$LFS find $MOUNT --ost 0 | xargs rm
+	$LFS find $MOUNT --ost 0 -print0 | xargs -0 rm
 
 	umount_client $MOUNT || error "umount client failed"
 	stop_ost || error "OST0 stop failure"
@@ -4299,6 +4515,10 @@ test_69() {
 	local idx=$($GETSTRIPE -i $DIR/$tdir/$tfile-last)
 	[ $idx -ne 0 ] && error "$DIR/$tdir/$tfile-last on $idx not 0" || true
 
+	local iused=$($LFS df -i $MOUNT | awk '/OST0000/ { print $3 }')
+	log "On OST0, $iused used inodes"
+	[ $iused -ge $((ost_max_pre/2 + 1000)) ] &&
+		error "OST replacement created too many inodes; $iused"
 	cleanup || error "cleanup failed with $?"
 }
 run_test 69 "replace an OST with the same index"
@@ -4956,7 +5176,7 @@ test_80() {
 }
 run_test 80 "mgc import reconnect race"
 
-# Save the original values of $OSTCOUNT and $OSTINDEX$i.
+#Save the original values of $OSTCOUNT and $OSTINDEX$i.
 save_ostindex() {
 	local new_ostcount=$1
 	saved_ostcount=$OSTCOUNT
@@ -5346,11 +5566,13 @@ test_84() {
 	local time_min=$(recovery_time_min)
 	local recovery_duration
 	local completed_clients
+	local correct_clients
 	local wrap_up=5
 
+	load_modules
 	echo "start mds service on $(facet_active_host $facet)"
-	start $facet ${dev} $MDS_MOUNT_OPTS \
-	    "-o recovery_time_hard=$time_min,recovery_time_soft=$time_min" $@ ||
+	start_mds \
+	"-o recovery_time_hard=$time_min,recovery_time_soft=$time_min" $@ ||
 		error "start MDS failed"
 
 	start_ost
@@ -5369,7 +5591,7 @@ test_84() {
 	#define OBD_FAIL_TGT_REPLAY_DELAY  0x709 | FAIL_SKIP
 	do_facet $SINGLEMDS "lctl set_param fail_loc=0x20000709 fail_val=5"
 
-	facet_failover $SINGLEMDS || error "failover: $?"
+	facet_failover --fsck $SINGLEMDS || error "failover: $?"
 	client_up
 
 	echo "recovery status"
@@ -5384,8 +5606,10 @@ test_84() {
 	completed_clients=$(do_facet $SINGLEMDS \
 		"$LCTL get_param -n mdt.$FSNAME-MDT0000.recovery_status" |
 		awk '/completed_clients/ { print $2 }')
-	[ "$completed_clients" = "1/2" ] ||
-		error "completed_clients != 1/2: $completed_clients"
+
+	correct_clients="$MDSCOUNT/$((MDSCOUNT+1))"
+	[ "$completed_clients" = "${correct_clients}" ] ||
+		error "$completed_clients != $correct_clients"
 
 	do_facet $SINGLEMDS "lctl set_param fail_loc=0"
 	umount_client $MOUNT1
@@ -5407,6 +5631,484 @@ test_85() {
 }
 run_test 85 "osd_ost init: fail ea_fid_set"
 
+test_86() {
+	[ "$(facet_fstype ost1)" = "zfs" ] &&
+		skip "LU-6442: no such mkfs params for ZFS OSTs" && return
+
+	local OST_OPTS="$(mkfs_opts ost1 $(ostdevname 1)) \
+		--reformat $(ostdevname 1) $(ostvdevname 1)"
+
+	local NEWSIZE=1024
+	local OLDSIZE=$(do_facet ost1 "$DEBUGFS -c -R stats $(ostdevname 1)" |
+		awk '/Flex block group size: / { print $NF; exit; }')
+
+	local opts=OST_OPTS
+	if [[ ${!opts} != *mkfsoptions* ]]; then
+		eval opts=\"${!opts} \
+			--mkfsoptions='\\\"-O flex_bg -G $NEWSIZE\\\"'\"
+	else
+		val=${!opts//--mkfsoptions=\\\"/ \
+			--mkfsoptions=\\\"-O flex_bg -G $NEWSIZE }
+		eval opts='${val}'
+	fi
+
+	echo "params: $opts"
+
+	add ost1 $opts || error "add ost1 failed with new params"
+
+	local FOUNDSIZE=$(do_facet ost1 "$DEBUGFS -c -R stats $(ostdevname 1)" |
+		awk '/Flex block group size: / { print $NF; exit; }')
+
+	[[ $FOUNDSIZE == $NEWSIZE ]] ||
+		error "Flex block group size: $FOUNDSIZE, expected: $NEWSIZE"
+	return 0
+}
+run_test 86 "Replacing mkfs.lustre -G option"
+
+test_87() { #LU-6544
+	[[ $(lustre_version_code $SINGLEMDS1) -ge $(version_code 2.7.56) ]] ||
+		{ skip "Need MDS version at least 2.7.56" && return; }
+	[[ $(facet_fstype $SINGLEMDS) != ldiskfs ]] &&
+		{ skip "Only applicable to ldiskfs-based MDTs" && return; }
+	[[ $OSTCOUNT -gt 69 ]] &&
+		{ skip "Ignore wide striping situation" && return; }
+
+	local mdsdev=$(mdsdevname 1)
+	local mdsvdev=$(mdsvdevname 1)
+	local file=$DIR/$tfile
+	local mntpt=$(facet_mntpt $SINGLEMDS)
+	local used_xattr_blk=0
+	local inode_size=${1:-512}
+	local left_size=0
+	local xtest="trusted.test"
+	local value
+	local orig
+	local i
+
+	#Please see LU-6544 for MDT inode size calculation
+	if [ $OSTCOUNT -gt 26 ]; then
+		inode_size=2048
+	elif [ $OSTCOUNT -gt 5 ]; then
+		inode_size=1024
+	fi
+	left_size=$(expr $inode_size - \
+			156 - \
+			32 - \
+			32 - $OSTCOUNT \* 24 - 16 - 3 -  \
+			24 - 16 - 3 - \
+			24 - 18 - $(expr length $tfile) - 16 - 4)
+	if [ $left_size -le 0 ]; then
+		echo "No space($left_size) is expected in inode."
+		echo "Try 1-byte xattr instead to verify this."
+		left_size=1
+	else
+		echo "Estimate: at most $left_size-byte space left in inode."
+	fi
+
+	unload_modules
+	reformat
+
+	add mds1 $(mkfs_opts mds1 ${mdsdev}) --stripe-count-hint=$OSTCOUNT \
+		--reformat $mdsdev $mdsvdev || error "add mds1 failed"
+	start_mdt 1 > /dev/null || error "start mdt1 failed"
+	for i in $(seq $OSTCOUNT); do
+		start ost$i $(ostdevname $i) $OST_MOUNT_OPTS > /dev/null ||
+			error "start ost$i failed"
+	done
+	mount_client $MOUNT > /dev/null || error "mount client $MOUNT failed"
+	check_mount || error "check client $MOUNT failed"
+
+	#set xattr
+	$SETSTRIPE -c -1 $file || error "$SETSTRIPE -c -1 $file failed"
+	$GETSTRIPE $file || error "$GETSTRIPE $file failed"
+	i=$($GETSTRIPE -c $file)
+	if [ $i -ne $OSTCOUNT ]; then
+		left_size=$(expr $left_size + $(expr $OSTCOUNT - $i) \* 24)
+		echo -n "Since only $i out $OSTCOUNT OSTs are used, "
+		echo -n "the expected left space is changed to "
+		echo "$left_size bytes at most."
+	fi
+	value=$(generate_string $left_size)
+	setfattr -n $xtest -v $value $file
+	orig=$(get_xattr_value $xtest $file)
+	[[ "$orig" != "$value" ]] && error "$xtest changed"
+
+	#Verify if inode has some expected space left
+	umount $MOUNT > /dev/null || error "umount $MOUNT failed"
+	stop_mdt 1 > /dev/null || error "stop mdt1 failed"
+	mount_ldiskfs $SINGLEMDS || error "mount -t ldiskfs $SINGLEMDS failed"
+
+	do_facet $SINGLEMDS ls -sal $mntpt/ROOT/$tfile
+	used_xattr_blk=$(do_facet $SINGLEMDS ls -s $mntpt/ROOT/$tfile |
+			awk '{ print $1 }')
+	[[ $used_xattr_blk -eq 0 ]] &&
+		error "Please check MDS inode size calculation: \
+		       more than $left_size-byte space left in inode."
+	echo "Verified: at most $left_size-byte space left in inode."
+
+	stopall
+}
+run_test 87 "check if MDT inode can hold EAs with N stripes properly"
+
+# $1 test directory
+# $2 (optional) value of max_mod_rpcs_in_flight to set
+check_max_mod_rpcs_in_flight() {
+	local dir="$1"
+	local mmr="$2"
+	local idx
+	local facet
+	local tmp
+	local i
+
+	idx=$(printf "%04x" $($LFS getdirstripe -i $dir))
+	facet="mds$((0x$idx + 1))"
+
+	if [ -z "$mmr" ]; then
+		# get value of max_mod_rcps_in_flight
+		mmr=$($LCTL get_param -n \
+			mdc.$FSNAME-MDT$idx-mdc-*.max_mod_rpcs_in_flight) ||
+			error "Unable to get max_mod_rpcs_in_flight"
+		echo "max_mod_rcps_in_flight is $mmr"
+	else
+		# set value of max_mod_rpcs_in_flight
+		$LCTL set_param \
+		    mdc.$FSNAME-MDT$idx-mdc-*.max_mod_rpcs_in_flight=$mmr ||
+			error "Unable to set max_mod_rpcs_in_flight to $mmr"
+		echo "max_mod_rpcs_in_flight set to $mmr"
+	fi
+
+	# create mmr+1 files
+	echo "creating $((mmr + 1)) files ..."
+	umask 0022
+	for i in $(seq $((mmr + 1))); do
+		touch $dir/file-$i
+	done
+
+	### part 1 ###
+
+	# consumes mmr-1 modify RPC slots
+	#define OBD_FAIL_MDS_REINT_MULTI_NET     0x159
+	# drop requests on MDT so that RPC slots are consumed
+	# during all the request resend interval
+	do_facet $facet "$LCTL set_param fail_loc=0x159"
+	echo "launch $((mmr - 1)) chmod in parallel ..."
+	for i in $(seq $((mmr - 1))); do
+		chmod 0600 $dir/file-$i &
+	done
+	sleep 1
+
+	# send one additional modify RPC
+	do_facet $facet "$LCTL set_param fail_loc=0"
+	echo "launch 1 additional chmod in parallel ..."
+	chmod 0600 $dir/file-$mmr &
+	sleep 1
+
+	# check this additional modify RPC get a modify RPC slot
+	# and succeed its operation
+	checkstat -vp 0600 $dir/file-$mmr ||
+		error "Unable to send $mmr modify RPCs in parallel"
+	wait
+
+	### part 2 ###
+
+	# consumes mmr modify RPC slots
+	#define OBD_FAIL_MDS_REINT_MULTI_NET     0x159
+	# drop requests on MDT so that RPC slots are consumed
+	# during all the request resend interval
+	do_facet $facet "$LCTL set_param fail_loc=0x159"
+	echo "launch $mmr chmod in parallel ..."
+	for i in $(seq $mmr); do
+		chmod 0666 $dir/file-$i &
+	done
+	sleep 1
+
+	# send one additional modify RPC
+	do_facet $facet "$LCTL set_param fail_loc=0"
+	echo "launch 1 additional chmod in parallel ..."
+	chmod 0666 $dir/file-$((mmr + 1)) &
+	sleep 1
+
+	# check this additional modify RPC blocked getting a modify RPC slot
+	checkstat -vp 0644 $dir/file-$((mmr + 1)) ||
+		error "Unexpectedly send $(($mmr + 1)) modify RPCs in parallel"
+	wait
+}
+
+test_90a() {
+	reformat
+	if ! combined_mgs_mds ; then
+		start_mgs
+	fi
+	setup
+
+	[[ $($LCTL get_param mdc.*.import |
+	     grep "connect_flags:.*multi_mod_rpc") ]] ||
+		{ skip "Need MDC with 'multi_mod_rpcs' feature"; return 0; }
+
+	# check default value
+	$LFS mkdir -c1 $DIR/$tdir || error "mkdir $DIR/$tdir failed"
+	check_max_mod_rpcs_in_flight $DIR/$tdir
+
+	cleanup
+}
+run_test 90a "check max_mod_rpcs_in_flight is enforced"
+
+test_90b() {
+	local idx
+	local facet
+	local tmp
+	local mmrpc
+
+	setup
+
+	[[ $($LCTL get_param mdc.*.import |
+	     grep "connect_flags:.*multi_mod_rpc") ]] ||
+		{ skip "Need MDC with 'multi_mod_rpcs' feature"; return 0; }
+
+	### test 1.
+	# update max_mod_rpcs_in_flight
+	$LFS mkdir -c1 $DIR/${tdir}1 || error "mkdir $DIR/${tdir}1 failed"
+	check_max_mod_rpcs_in_flight $DIR/${tdir}1 1
+
+	### test 2.
+	# check client is able to send multiple modify RPCs in paralell
+	tmp=$($LCTL get_param -n mdc.$FSNAME-MDT*-mdc-*.import |
+		grep -c "multi_mod_rpcs")
+	if [ "$tmp" -ne $MDSCOUNT ]; then
+		echo "Client not able to send multiple modify RPCs in parallel"
+		cleanup
+		return
+	fi
+
+	# update max_mod_rpcs_in_flight
+	$LFS mkdir -c1 $DIR/${tdir}2 || error "mkdir $DIR/${tdir}2 failed"
+	check_max_mod_rpcs_in_flight $DIR/${tdir}2 5
+
+	### test 3.
+	$LFS mkdir -c1 $DIR/${tdir}3 || error "mkdir $DIR/${tdir}3 failed"
+	idx=$(printf "%04x" $($LFS getdirstripe -i $DIR/${tdir}3))
+	facet="mds$((0x$idx + 1))"
+
+	# save MDT max_mod_rpcs_per_client
+	mmrpc=$(do_facet $facet \
+		    cat /sys/module/mdt/parameters/max_mod_rpcs_per_client)
+
+	# update max_mod_rpcs_in_flight
+	umount_client $MOUNT
+	do_facet $facet \
+		"echo 16 > /sys/module/mdt/parameters/max_mod_rpcs_per_client"
+	mount_client $MOUNT
+	$LCTL set_param mdc.$FSNAME-MDT$idx-mdc-*.max_rpcs_in_flight=17
+	check_max_mod_rpcs_in_flight $DIR/${tdir}3 16
+
+	# restore MDT max_mod_rpcs_per_client initial value
+	do_facet $facet \
+		"echo $mmrpc > /sys/module/mdt/parameters/max_mod_rpcs_per_client"
+
+	rm -rf $DIR/${tdir}?
+	cleanup
+}
+run_test 90b "check max_mod_rpcs_in_flight is enforced after update"
+
+test_90c() {
+	local tmp
+	local mrif
+	local mmrpc
+
+	setup
+
+	[[ $($LCTL get_param mdc.*.import |
+	     grep "connect_flags:.*multi_mod_rpc") ]] ||
+		{ skip "Need MDC with 'multi_mod_rpcs' feature"; return 0; }
+
+	# check client is able to send multiple modify RPCs in paralell
+	tmp=$($LCTL get_param -n mdc.$FSNAME-MDT*-mdc-*.import |
+		grep -c "multi_mod_rpcs")
+	if [ "$tmp" -ne $MDSCOUNT ]; then
+		skip "Client not able to send multiple modify RPCs in parallel"
+		cleanup
+		return
+	fi
+
+	# get max_rpcs_in_flight value
+	mrif=$($LCTL get_param -n mdc.$FSNAME-MDT0000-mdc-*.max_rpcs_in_flight)
+	echo "max_rpcs_in_flight is $mrif"
+
+	# get MDT max_mod_rpcs_per_client
+	mmrpc=$(do_facet mds1 \
+		    cat /sys/module/mdt/parameters/max_mod_rpcs_per_client)
+	echo "max_mod_rpcs_per_client is $mmrpc"
+
+	# testcase 1
+	# attempt to set max_mod_rpcs_in_flight to max_rpcs_in_flight value
+	# prerequisite: set max_mod_rpcs_per_client to max_rpcs_in_flight value
+	umount_client $MOUNT
+	do_facet mds1 \
+		"echo $mrif > /sys/module/mdt/parameters/max_mod_rpcs_per_client"
+	mount_client $MOUNT
+
+	$LCTL set_param \
+	    mdc.$FSNAME-MDT0000-mdc-*.max_mod_rpcs_in_flight=$mrif &&
+	    error "set max_mod_rpcs_in_flight to $mrif should fail"
+
+	umount_client $MOUNT
+	do_facet mds1 \
+		"echo $mmrpc > /sys/module/mdt/parameters/max_mod_rpcs_per_client"
+	mount_client $MOUNT
+
+	# testcase 2
+	# attempt to set max_mod_rpcs_in_flight to max_mod_rpcs_per_client+1
+	# prerequisite: set max_rpcs_in_flight to max_mod_rpcs_per_client+2
+	$LCTL set_param \
+	    mdc.$FSNAME-MDT0000-mdc-*.max_rpcs_in_flight=$((mmrpc + 2))
+
+	$LCTL set_param \
+	    mdc.$FSNAME-MDT0000-mdc-*.max_mod_rpcs_in_flight=$((mmrpc + 1)) &&
+	    error "set max_mod_rpcs_in_flight to $((mmrpc + 1)) should fail"
+
+	cleanup
+}
+run_test 90c "check max_mod_rpcs_in_flight update limits"
+
+test_90d() {
+	local idx
+	local facet
+	local mmr
+	local i
+	local pid
+
+	setup
+
+	[[ $($LCTL get_param mdc.*.import |
+	     grep "connect_flags:.*multi_mod_rpc") ]] ||
+		{ skip "Need MDC with 'multi_mod_rpcs' feature"; return 0; }
+
+	$LFS mkdir -c1 $DIR/$tdir || error "mkdir $DIR/$tdir failed"
+	idx=$(printf "%04x" $($LFS getdirstripe -i $DIR/$tdir))
+	facet="mds$((0x$idx + 1))"
+
+	# check client version supports multislots
+	tmp=$($LCTL get_param -N \
+		mdc.$FSNAME-MDT$idx-mdc-*.max_mod_rpcs_in_flight)
+	if [ -z "$tmp" ]; then
+		skip "Client does not support multiple modify RPCs in flight"
+		cleanup
+		return
+	fi
+
+	# get current value of max_mod_rcps_in_flight
+	mmr=$($LCTL get_param -n \
+		mdc.$FSNAME-MDT$idx-mdc-*.max_mod_rpcs_in_flight)
+	echo "max_mod_rcps_in_flight is $mmr"
+
+	# create mmr files
+	echo "creating $mmr files ..."
+	umask 0022
+	for i in $(seq $mmr); do
+		touch $DIR/$tdir/file-$i
+	done
+
+	# prepare for close RPC
+	multiop_bg_pause $DIR/$tdir/file-close O_c
+	pid=$!
+
+	# consumes mmr modify RPC slots
+	#define OBD_FAIL_MDS_REINT_MULTI_NET     0x159
+	# drop requests on MDT so that RPC slots are consumed
+	# during all the request resend interval
+	do_facet $facet "$LCTL set_param fail_loc=0x159"
+	echo "launch $mmr chmod in parallel ..."
+	for i in $(seq $mmr); do
+		chmod 0600 $DIR/$tdir/file-$i &
+	done
+
+	# send one additional close RPC
+	do_facet $facet "$LCTL set_param fail_loc=0"
+	echo "launch 1 additional close in parallel ..."
+	kill -USR1 $pid
+	cancel_lru_locks mdc
+	sleep 1
+
+	# check this additional close RPC get a modify RPC slot
+	# and multiop process completed
+	[ -d /proc/$pid ] &&
+		error "Unable to send the additional close RPC in parallel"
+	wait
+	rm -rf $DIR/$tdir
+	cleanup
+}
+run_test 90d "check one close RPC is allowed above max_mod_rpcs_in_flight"
+
+check_uuid_on_ost() {
+	local nid=$1
+	do_facet ost1 "$LCTL get_param obdfilter.${FSNAME}*.exports.'$nid'.uuid"
+}
+
+check_uuid_on_mdt() {
+	local nid=$1
+	do_facet $SINGLEMDS "$LCTL get_param mdt.${FSNAME}*.exports.'$nid'.uuid"
+}
+
+test_91() {
+	local uuid
+	local nid
+	local found
+
+	load_modules
+
+	[[ $(lustre_version_code ost1) -ge $(version_code 2.7.63) ]] ||
+		{ skip "Need OST version at least 2.7.63" && return 0; }
+	[[ $(lustre_version_code $SINGLEMDS) -ge $(version_code 2.7.63) ]] ||
+		{ skip "Need MDT version at least 2.7.63" && return 0; }
+
+	start_mds || error "MDS start failed"
+	start_ost || error "unable to start OST"
+	mount_client $MOUNT || error "client start failed"
+	check_mount || error "check_mount failed"
+
+	if remote_mds; then
+		nid=$($LCTL list_nids | head -1 | sed  "s/\./\\\./g")
+	else
+		nid="0@lo"
+	fi
+	uuid=$(get_client_uuid $MOUNT)
+
+	echo "list nids on mdt:"
+	do_facet $SINGLEMDS "$LCTL list_param mdt.${FSNAME}*.exports.*"
+	echo "uuid from $nid:"
+	do_facet $SINGLEMDS "$LCTL get_param mdt.${FSNAME}*.exports.'$nid'.uuid"
+
+	found=$(check_uuid_on_mdt $nid | grep $uuid)
+	[ -z "$found" ] && error "can't find $uuid $nid on MDT"
+	found=$(check_uuid_on_ost $nid | grep $uuid)
+	[ -z "$found" ] && error "can't find $uuid $nid on OST"
+
+	# umount the client so it won't reconnect
+	manual_umount_client --force || error "failed to umount $?"
+	# shouldn't disappear on MDS after forced umount
+	found=$(check_uuid_on_mdt $nid | grep $uuid)
+	[ -z "$found" ] && error "can't find $uuid $nid"
+
+	echo "evict $nid"
+	do_facet $SINGLEMDS \
+		"$LCTL set_param -n mdt.${mds1_svc}.evict_client nid:$nid"
+
+	found=$(check_uuid_on_mdt $nid | grep $uuid)
+	[ -n "$found" ] && error "found $uuid $nid on MDT"
+	found=$(check_uuid_on_ost $nid | grep $uuid)
+	[ -n "$found" ] && error "found $uuid $nid on OST"
+
+	# check it didn't reconnect (being umounted)
+	sleep $((TIMEOUT+1))
+	found=$(check_uuid_on_mdt $nid | grep $uuid)
+	[ -n "$found" ] && error "found $uuid $nid on MDT"
+	found=$(check_uuid_on_ost $nid | grep $uuid)
+	[ -n "$found" ] && error "found $uuid $nid on OST"
+
+	cleanup
+}
+run_test 91 "evict-by-nid support"
+
 if ! combined_mgs_mds ; then
 	stop mgs
 fi