X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Ftests%2Fconf-sanity.sh;h=1f00d34503527e200bb5522bc5acd15e95bfed80;hp=cf8e3d43467bd3b9f644af5badf39c9744522794;hb=555561500b28a31639f360b209d7b1e4a81fa5f7;hpb=3917e62018878dfffac59ceed70f20b0419945d3

diff --git a/lustre/tests/conf-sanity.sh b/lustre/tests/conf-sanity.sh
index cf8e3d4..1f00d34 100644
--- a/lustre/tests/conf-sanity.sh
+++ b/lustre/tests/conf-sanity.sh
@@ -1,9 +1,9 @@
 #!/bin/bash
 
-# FIXME - there is no reason to use all of these different
-#   return codes, espcially when most of them are mapped to something
-#   else anyway.  The combination of test number and return code
-#   figure out what failed.
+# FIXME - there is no reason to use all of these different return codes,
+#   espcially when most of them are mapped to something else anyway.
+#   The tests should use error() to describe the failure more clearly,
+#   and reduce the need to look into the tests to see what failed.
 
 set -e
 
@@ -54,31 +54,29 @@ export MULTIOP=${MULTIOP:-multiop}
 
 . $LUSTRE/tests/test-framework.sh
 init_test_env $@
+. ${CONFIG:=$LUSTRE/tests/cfg/$NAME.sh}
 
 # use small MDS + OST size to speed formatting time
 # do not use too small MDSSIZE/OSTSIZE, which affect the default jouranl size
+# STORED_MDSSIZE is used in test_18
+STORED_MDSSIZE=$MDSSIZE
+STORED_OSTSIZE=$OSTSIZE
 MDSSIZE=200000
 OSTSIZE=200000
-. ${CONFIG:=$LUSTRE/tests/cfg/$NAME.sh}
 
 if ! combined_mgs_mds; then
     # bug number for skipped test:    23954
     ALWAYS_EXCEPT="$ALWAYS_EXCEPT       24b"
 fi
 
-# STORED_MDSSIZE is used in test_18
-if [ -n "$MDSSIZE" ]; then
-    STORED_MDSSIZE=$MDSSIZE
-fi
-
 # pass "-E lazy_itable_init" to mke2fs to speed up the formatting time
 if [[ "$LDISKFS_MKFS_OPTS" != *lazy_itable_init* ]]; then
 	LDISKFS_MKFS_OPTS=$(csa_add "$LDISKFS_MKFS_OPTS" -E lazy_itable_init)
 fi
 
 [ $(facet_fstype $SINGLEMDS) = "zfs" ] &&
-# bug number for skipped test:        LU-2778 LU-2059
-	ALWAYS_EXCEPT="$ALWAYS_EXCEPT 57b     50h"
+# bug number for skipped test:        LU-2778 LU-2059 LU-4444
+	ALWAYS_EXCEPT="$ALWAYS_EXCEPT 57b     50h     69"
 
 init_logging
 
@@ -86,7 +84,7 @@ init_logging
 require_dsh_mds || exit 0
 require_dsh_ost || exit 0
 #
-[ "$SLOW" = "no" ] && EXCEPT_SLOW="30a 31 45"
+[ "$SLOW" = "no" ] && EXCEPT_SLOW="30a 31 45 69"
 
 
 assert_DIR
@@ -125,7 +123,7 @@ reformat() {
 
 start_mgs () {
 	echo "start mgs"
-	start mgs $MGSDEV $MGS_MOUNT_OPTS
+	start mgs $(mgsdevname) $MGS_MOUNT_OPTS
 }
 
 start_mdt() {
@@ -896,7 +894,7 @@ MDSDEV1_2=$fs2mds_DEV
 OSTDEV1_2=$fs2ost_DEV
 OSTDEV2_2=$fs3ost_DEV
 
-cleanup_24a() {
+cleanup_fs2() {
 	trap 0
 	echo "umount $MOUNT2 ..."
 	umount $MOUNT2 || true
@@ -931,7 +929,7 @@ test_24a() {
 		--reformat $fs2ostdev $fs2ostvdev || exit 10
 
 	setup
-	start fs2mds $fs2mdsdev $MDS_MOUNT_OPTS && trap cleanup_24a EXIT INT
+	start fs2mds $fs2mdsdev $MDS_MOUNT_OPTS && trap cleanup_fs2 EXIT INT
 	start fs2ost $fs2ostdev $OST_MOUNT_OPTS
 	mkdir -p $MOUNT2
 	mount -t lustre $MGSNID:/${FSNAME2} $MOUNT2 || return 1
@@ -956,7 +954,7 @@ test_24a() {
 	stop_mds
 	MDS=$(do_facet $SINGLEMDS "lctl get_param -n devices" | awk '($3 ~ "mdt" && $4 ~ "MDT") { print $4 }' | head -1)
 	[ -z "$MDS" ] && error "No MDT" && return 8
-	cleanup_24a
+	cleanup_fs2
 	cleanup_nocli || return 6
 }
 run_test 24a "Multiple MDTs on a single node"
@@ -1064,6 +1062,78 @@ test_28() {
 }
 run_test 28 "permanent parameter setting"
 
+test_28a() { # LU-4221
+	[[ $(lustre_version_code ost1) -ge $(version_code 2.5.52) ]] ||
+		{ skip "Need OST version at least 2.5.52" && return 0; }
+	[ "$(facet_fstype ost1)" = "zfs" ] &&
+		skip "LU-4221: no such proc params for ZFS OSTs" && return
+
+	local name
+	local param
+	local cmd
+	local old
+	local new
+	local device="$FSNAME-OST0000"
+
+	setup
+
+	# In this test we will set three kinds of proc parameters with
+	# lctl conf_param:
+	# 1. the ones moved from the OFD to the OSD, and only their
+	#    symlinks kept in obdfilter
+	# 2. non-symlink ones in the OFD
+	# 3. non-symlink ones in the OSD
+
+	# Check 1.
+	# prepare a symlink parameter in the OFD
+	name="writethrough_cache_enable"
+	param="$device.ost.$name"
+	cmd="$LCTL get_param -n obdfilter.$device.$name"
+
+	# conf_param the symlink parameter in the OFD
+	old=$(do_facet ost1 $cmd)
+	new=$(((old + 1) % 2))
+	set_conf_param_and_check ost1 "$cmd" "$param" $new ||
+		error "lctl conf_param $device.ost.$param=$new failed"
+
+	# conf_param the target parameter in the OSD
+	param="$device.osd.$name"
+	cmd="$LCTL get_param -n osd-*.$device.$name"
+	set_conf_param_and_check ost1 "$cmd" "$param" $old ||
+		error "lctl conf_param $device.osd.$param=$old failed"
+
+	# Check 2.
+	# prepare a non-symlink parameter in the OFD
+	name="client_cache_seconds"
+	param="$device.ost.$name"
+	cmd="$LCTL get_param -n obdfilter.$device.$name"
+
+	# conf_param the parameter in the OFD
+	old=$(do_facet ost1 $cmd)
+	new=$((old * 2))
+	set_conf_param_and_check ost1 "$cmd" "$param" $new ||
+		error "lctl conf_param $device.ost.$param=$new failed"
+	set_conf_param_and_check ost1 "$cmd" "$param" $old ||
+		error "lctl conf_param $device.ost.$param=$old failed"
+
+	# Check 3.
+	# prepare a non-symlink parameter in the OSD
+	name="lma_self_repair"
+	param="$device.osd.$name"
+	cmd="$LCTL get_param -n osd-*.$device.$name"
+
+	# conf_param the parameter in the OSD
+	old=$(do_facet ost1 $cmd)
+	new=$(((old + 1) % 2))
+	set_conf_param_and_check ost1 "$cmd" "$param" $new ||
+		error "lctl conf_param $device.osd.$param=$new failed"
+	set_conf_param_and_check ost1 "$cmd" "$param" $old ||
+		error "lctl conf_param $device.osd.$param=$old failed"
+
+	cleanup
+}
+run_test 28a "set symlink parameters permanently with conf_param"
+
 test_29() {
 	[ "$OSTCOUNT" -lt "2" ] && skip_env "$OSTCOUNT < 2, skipping" && return
         setup > /dev/null 2>&1
@@ -1393,16 +1463,20 @@ t32_reload_modules() {
 t32_wait_til_devices_gone() {
 	local node=$1
 	local devices
+	local loops
 	local i=0
 
 	echo wait for devices to go
 	while ((i < 20)); do
 		devices=$(do_rpc_nodes $node $LCTL device_list | wc -l)
-		((devices == 0)) && return 0
+		loops=$(do_rpc_nodes $node losetup -a | grep -c t32)
+		((devices == 0 && loops == 0)) && return 0
 		sleep 5
 		i=$((i + 1))
 	done
-	echo "waiting for devices on $node: Given up"
+	echo "waiting for dev on $node: dev $devices loop $loops given up"
+	do_rpc_nodes $node "losetup -a"
+	do_rpc_nodes $node "$LCTL devices_list"
 	return 1
 }
 
@@ -1537,6 +1611,7 @@ t32_test() {
 	$r $LCTL set_param debug="$PTLDEBUG"
 
 	$r $TUNEFS --dryrun $tmp/mdt || {
+		$r losetup -a
 		error_noexit "tunefs.lustre before mounting the MDT"
 		return 1
 	}
@@ -1544,6 +1619,7 @@ t32_test() {
 		mopts=loop,writeconf
 		if [ $fstype == "ldiskfs" ]; then
 			$r $TUNEFS --quota $tmp/mdt || {
+				$r losetup -a
 				error_noexit "Enable mdt quota feature"
 				return 1
 			}
@@ -1560,7 +1636,7 @@ t32_test() {
 			$r mount -t lustre -o loop,nosvc $tmp/mdt $tmp/mnt/mdt
 			$r lctl replace_nids $fsname-OST0000 $ostnid
 			$r lctl replace_nids $fsname-MDT0000 $nid
-			$r umount $tmp/mnt/mdt
+			$r umount -d $tmp/mnt/mdt
 		fi
 
 		mopts=loop,exclude=$fsname-OST0000
@@ -1569,6 +1645,7 @@ t32_test() {
 	t32_wait_til_devices_gone $node
 
 	$r mount -t lustre -o $mopts $tmp/mdt $tmp/mnt/mdt || {
+		$r losetup -a
 		error_noexit "Mounting the MDT"
 		return 1
 	}
@@ -1620,6 +1697,7 @@ t32_test() {
 		mopts=loop,mgsnode=$nid,$writeconf
 		if [ $fstype == "ldiskfs" ]; then
 			$r $TUNEFS --quota $tmp/ost || {
+				$r losetup -a
 				error_noexit "Enable ost quota feature"
 				return 1
 			}
@@ -1868,6 +1946,7 @@ t32_test() {
 
 		# mount a second time to make sure we didnt leave upgrade flag on
 		$r $TUNEFS --dryrun $tmp/mdt || {
+			$r losetup -a
 			error_noexit "tunefs.lustre before remounting the MDT"
 			return 1
 		}
@@ -1963,7 +2042,7 @@ test_33a() { # bug 12333, was test_33
 		--fsname=${FSNAME2} --index=8191 --reformat $fs2ostdev \
 		$fs2ostvdev || exit 10
 
-        start fs2mds $fs2mdsdev $MDS_MOUNT_OPTS && trap cleanup_24a EXIT INT
+        start fs2mds $fs2mdsdev $MDS_MOUNT_OPTS && trap cleanup_fs2 EXIT INT
         start fs2ost $fs2ostdev $OST_MOUNT_OPTS
         do_facet $SINGLEMDS "$LCTL conf_param $FSNAME2.sys.timeout=200" || rc=1
         mkdir -p $MOUNT2
@@ -2728,7 +2807,7 @@ test_48() { # bug 17636
 run_test 48 "too many acls on file"
 
 # check PARAM_SYS_LDLM_TIMEOUT option of MKFS.LUSTRE
-test_49() { # bug 17710
+test_49a() { # bug 17710
 	local timeout_orig=$TIMEOUT
 	local ldlm_timeout_orig=$LDLM_TIMEOUT
 	local LOCAL_TIMEOUT=20
@@ -2738,49 +2817,60 @@ test_49() { # bug 17710
 
 	reformat
 	setup_noconfig
-	check_mount || return 1
+	check_mount || error "client mount failed"
 
 	echo "check ldlm_timout..."
-	LDLM_MDS="`do_facet $SINGLEMDS lctl get_param -n ldlm_timeout`"
-	LDLM_OST1="`do_facet ost1 lctl get_param -n ldlm_timeout`"
-	LDLM_CLIENT="`do_facet client lctl get_param -n ldlm_timeout`"
+	local LDLM_MDS="$(do_facet $SINGLEMDS lctl get_param -n ldlm_timeout)"
+	local LDLM_OST1="$(do_facet ost1 lctl get_param -n ldlm_timeout)"
+	local LDLM_CLIENT="$(do_facet client lctl get_param -n ldlm_timeout)"
 
-	if [ $LDLM_MDS -ne $LDLM_OST1 ] || [ $LDLM_MDS -ne $LDLM_CLIENT ]; then
+	if [ $LDLM_MDS -ne $LDLM_OST1 -o $LDLM_MDS -ne $LDLM_CLIENT ]; then
 		error "Different LDLM_TIMEOUT:$LDLM_MDS $LDLM_OST1 $LDLM_CLIENT"
 	fi
 
 	if [ $LDLM_MDS -ne $((LOCAL_TIMEOUT / 3)) ]; then
-		error "LDLM_TIMEOUT($LDLM_MDS) is not correct"
+		error "LDLM_TIMEOUT($LDLM_MDS) is not $((LOCAL_TIMEOUT / 3))"
 	fi
 
 	umount_client $MOUNT
-	stop_ost || return 2
-	stop_mds || return 3
+	stop_ost || error "problem stopping OSS"
+	stop_mds || error "problem stopping MDS"
+
+	LDLM_TIMEOUT=$ldlm_timeout_orig
+	TIMEOUT=$timeout_orig
+}
+run_test 49a "check PARAM_SYS_LDLM_TIMEOUT option of mkfs.lustre"
+
+test_49b() { # bug 17710
+	local timeout_orig=$TIMEOUT
+	local ldlm_timeout_orig=$LDLM_TIMEOUT
+	local LOCAL_TIMEOUT=20
 
 	LDLM_TIMEOUT=$((LOCAL_TIMEOUT - 1))
+	TIMEOUT=$LOCAL_TIMEOUT
 
 	reformat
 	setup_noconfig
-	check_mount || return 7
+	check_mount || error "client mount failed"
 
-	LDLM_MDS="`do_facet $SINGLEMDS lctl get_param -n ldlm_timeout`"
-	LDLM_OST1="`do_facet ost1 lctl get_param -n ldlm_timeout`"
-	LDLM_CLIENT="`do_facet client lctl get_param -n ldlm_timeout`"
+	local LDLM_MDS="$(do_facet $SINGLEMDS lctl get_param -n ldlm_timeout)"
+	local LDLM_OST1="$(do_facet ost1 lctl get_param -n ldlm_timeout)"
+	local LDLM_CLIENT="$(do_facet client lctl get_param -n ldlm_timeout)"
 
-	if [ $LDLM_MDS -ne $LDLM_OST1 ] || [ $LDLM_MDS -ne $LDLM_CLIENT ]; then
+	if [ $LDLM_MDS -ne $LDLM_OST1 -o $LDLM_MDS -ne $LDLM_CLIENT ]; then
 		error "Different LDLM_TIMEOUT:$LDLM_MDS $LDLM_OST1 $LDLM_CLIENT"
 	fi
 
 	if [ $LDLM_MDS -ne $((LOCAL_TIMEOUT - 1)) ]; then
-		error "LDLM_TIMEOUT($LDLM_MDS) is not correct"
+		error "LDLM_TIMEOUT($LDLM_MDS) is not $((LOCAL_TIMEOUT - 1))"
 	fi
 
-	cleanup || return $?
+	cleanup || error "cleanup failed"
 
 	LDLM_TIMEOUT=$ldlm_timeout_orig
 	TIMEOUT=$timeout_orig
 }
-run_test 49 "check PARAM_SYS_LDLM_TIMEOUT option of MKFS.LUSTRE"
+run_test 49b "check PARAM_SYS_LDLM_TIMEOUT option of mkfs.lustre"
 
 lazystatfs() {
         # Test both statfs and lfs df and fail if either one fails
@@ -3451,7 +3541,7 @@ test_58() { # bug 22658
 	# remove all files from the OBJECTS dir
 	do_facet $SINGLEMDS "mount -t ldiskfs $opts $devname $MNTDIR"
 	do_facet $SINGLEMDS "find $MNTDIR/O/1/d* -type f -delete"
-	do_facet $SINGLEMDS "umount $MNTDIR"
+	do_facet $SINGLEMDS "umount -d $MNTDIR"
 	# restart MDS with missing llog files
 	start_mds
 	do_facet mds "lctl set_param fail_loc=0"
@@ -3677,7 +3767,7 @@ 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 $brpt"
+	do_facet $SINGLEMDS "umount -d $brpt"
 
 	# restart MDS, the "last_rcvd" file should be recreated.
 	start_mds || error "fail to restart the MDS"
@@ -3827,7 +3917,7 @@ test_68() {
 
 	umount_client $MOUNT || error "umount client failed"
 
-	start_mds || error "MDT start failed"
+	start_mdt 1 || error "MDT start failed"
 	start_ost
 
 	# START-END - the sequences we'll be reserving
@@ -3862,10 +3952,60 @@ test_68() {
 }
 run_test 68 "be able to reserve specific sequences in FLDB"
 
+test_69() {
+	local server_version=$(lustre_version_code $SINGLEMDS)
+
+	[[ $server_version -lt $(version_code 2.4.2) ]] &&
+		skip "Need MDS version at least 2.4.2" && return
+
+	[[ $server_version -ge $(version_code 2.4.50) ]] &&
+	[[ $server_version -lt $(version_code 2.5.0) ]] &&
+		skip "Need MDS version at least 2.5.0" && return
+
+	setup
+
+	# use OST0000 since it probably has the most creations
+	local OSTNAME=$(ostname_from_index 0)
+	local mdtosc_proc1=$(get_mdtosc_proc_path mds1 $OSTNAME)
+	local last_id=$(do_facet mds1 lctl get_param -n \
+			osc.$mdtosc_proc1.prealloc_last_id)
+
+	# Want to have OST LAST_ID over 1.5 * OST_MAX_PRECREATE to
+	# verify that the LAST_ID recovery is working properly.  If
+	# not, then the OST will refuse to allow the MDS connect
+	# because the LAST_ID value is too different from the MDS
+	#define OST_MAX_PRECREATE=20000
+	local num_create=$((20000 * 5))
+
+	mkdir -p $DIR/$tdir
+	$LFS setstripe -i 0 $DIR/$tdir
+	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
+
+	stop_ost || error "OST0 stop failure"
+	add ost1 $(mkfs_opts ost1 $(ostdevname 1)) --reformat --replace \
+		$(ostdevname 1) $(ostvdevname 1) ||
+		error "reformat and replace $ostdev failed"
+	start_ost || error "OST0 restart failure"
+	wait_osc_import_state mds ost FULL
+
+	touch $DIR/$tdir/$tfile-last || error "create file after reformat"
+	local idx=$($LFS getstripe -i $DIR/$tdir/$tfile-last)
+	[ $idx -ne 0 ] && error "$DIR/$tdir/$tfile-last on $idx not 0" || true
+
+	cleanup
+}
+run_test 69 "replace an OST with the same index"
+
 test_70a() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
 	local MDTIDX=1
 
+	cleanup
+
 	start_mdt 1 || error "MDT0 start fail"
 
 	start_ost || error "OST0 start fail"
@@ -4284,7 +4424,7 @@ test_77() { # LU-3445
 
 	add fs2mds $(mkfs_opts mds1 $fs2mdsdev) --mgs --fsname=$fsname \
 		--reformat $fs2mdsdev $fs2mdsvdev || error "add fs2mds failed"
-	start fs2mds $fs2mdsdev $MDS_MOUNT_OPTS && trap cleanup_24a EXIT INT ||
+	start fs2mds $fs2mdsdev $MDS_MOUNT_OPTS && trap cleanup_fs2 EXIT INT ||
 		error "start fs2mds failed"
 
 	mgsnid=$(do_facet fs2mds $LCTL list_nids | xargs | tr ' ' ,)
@@ -4299,15 +4439,162 @@ test_77() { # LU-3445
 	mkdir -p $MOUNT2
 	mount -t lustre $mgsnid:/$fsname $MOUNT2 || error "mount $MOUNT2 failed"
 	DIR=$MOUNT2 MOUNT=$MOUNT2 check_mount || error "check $MOUNT2 failed"
-	cleanup_24a
+	cleanup_fs2
 }
 run_test 77 "comma-separated MGS NIDs and failover node NIDs"
 
+test_78() {
+	[[ $(facet_fstype $SINGLEMDS) != ldiskfs ||
+	   $(facet_fstype ost1) != ldiskfs ]] &&
+		skip "only applicable to ldiskfs-based MDTs and OSTs" && return
+
+	# reformat the Lustre filesystem with a smaller size
+	local saved_MDSSIZE=$MDSSIZE
+	local saved_OSTSIZE=$OSTSIZE
+	MDSSIZE=$((MDSSIZE - 20000))
+	OSTSIZE=$((OSTSIZE - 20000))
+	reformat || error "(1) reformat Lustre filesystem failed"
+	MDSSIZE=$saved_MDSSIZE
+	OSTSIZE=$saved_OSTSIZE
+
+	# mount the Lustre filesystem
+	setup_noconfig || error "(2) setup Lustre filesystem failed"
+
+	# create some files
+	log "create test files"
+	local i
+	local file
+	local num_files=100
+	mkdir -p $MOUNT/$tdir || error "(3) mkdir $MOUNT/$tdir failed"
+	for i in $(seq $num_files); do
+		file=$MOUNT/$tdir/$tfile-$i
+		dd if=/dev/urandom of=$file count=1 bs=1M ||
+			error "(4) create $file failed"
+	done
+
+	# unmount the Lustre filesystem
+	cleanup || error "(5) cleanup Lustre filesystem failed"
+
+	# run e2fsck on the MDT and OST devices
+	local mds_host=$(facet_active_host $SINGLEMDS)
+	local ost_host=$(facet_active_host ost1)
+	local mds_dev=$(mdsdevname ${SINGLEMDS//mds/})
+	local ost_dev=$(ostdevname 1)
+
+	run_e2fsck $mds_host $mds_dev "-y"
+	run_e2fsck $ost_host $ost_dev "-y"
+
+	# get the original block count of the MDT and OST filesystems
+	local mds_orig_blks=$(get_block_count $SINGLEMDS $mds_dev)
+	local ost_orig_blks=$(get_block_count ost1 $ost_dev)
+
+	# expand the MDT and OST filesystems to the device size
+	run_resize2fs $SINGLEMDS $mds_dev "" || error "expand $SINGLEMDS failed"
+	run_resize2fs ost1 $ost_dev "" || error "expand ost1 failed"
+
+	# run e2fsck on the MDT and OST devices again
+	run_e2fsck $mds_host $mds_dev "-y"
+	run_e2fsck $ost_host $ost_dev "-y"
+
+	# mount the Lustre filesystem
+	setup
+
+	# check the files
+	log "check files after expanding the MDT and OST filesystems"
+	for i in $(seq $num_files); do
+		file=$MOUNT/$tdir/$tfile-$i
+		$CHECKSTAT -t file -s 1048576 $file ||
+			error "(6) checkstat $file failed"
+	done
+
+	# create more files
+	log "create more files after expanding the MDT and OST filesystems"
+	for i in $(seq $((num_files + 1)) $((num_files + 10))); do
+		file=$MOUNT/$tdir/$tfile-$i
+		dd if=/dev/urandom of=$file count=1 bs=1M ||
+			error "(7) create $file failed"
+	done
+
+	# unmount the Lustre filesystem
+	cleanup || error "(8) cleanup Lustre filesystem failed"
+
+	# run e2fsck on the MDT and OST devices
+	run_e2fsck $mds_host $mds_dev "-y"
+	run_e2fsck $ost_host $ost_dev "-y"
+
+	# get the maximum block count of the MDT and OST filesystems
+	local mds_max_blks=$(get_block_count $SINGLEMDS $mds_dev)
+	local ost_max_blks=$(get_block_count ost1 $ost_dev)
+
+	# get the minimum block count of the MDT and OST filesystems
+	local mds_min_blks=$(run_resize2fs $SINGLEMDS $mds_dev "" "-P" 2>&1 |
+				grep minimum | sed -e 's/^.*filesystem: //g')
+	local ost_min_blks=$(run_resize2fs ost1 $ost_dev "" "-P" 2>&1 |
+				grep minimum | sed -e 's/^.*filesystem: //g')
+
+	# shrink the MDT and OST filesystems to a smaller size
+	local shrunk=false
+	local new_blks
+	local base_blks
+	if [[ $mds_max_blks -gt $mds_min_blks &&
+	      $mds_max_blks -gt $mds_orig_blks ]]; then
+		[[ $mds_orig_blks -gt $mds_min_blks ]] &&
+			base_blks=$mds_orig_blks || base_blks=$mds_min_blks
+		new_blks=$(( (mds_max_blks - base_blks) / 2 + base_blks ))
+		run_resize2fs $SINGLEMDS $mds_dev $new_blks ||
+			error "shrink $SINGLEMDS to $new_blks failed"
+		shrunk=true
+	fi
+
+	if [[ $ost_max_blks -gt $ost_min_blks &&
+	      $ost_max_blks -gt $ost_orig_blks ]]; then
+		[[ $ost_orig_blks -gt $ost_min_blks ]] &&
+			base_blks=$ost_orig_blks || base_blks=$ost_min_blks
+		new_blks=$(( (ost_max_blks - base_blks) / 2 + base_blks ))
+		run_resize2fs ost1 $ost_dev $new_blks ||
+			error "shrink ost1 to $new_blks failed"
+		shrunk=true
+	fi
+
+	# check whether the MDT or OST filesystem was shrunk or not
+	if ! $shrunk; then
+		combined_mgs_mds || stop_mgs || error "(9) stop mgs failed"
+		reformat || error "(10) reformat Lustre filesystem failed"
+		return 0
+	fi
+
+	# run e2fsck on the MDT and OST devices again
+	run_e2fsck $mds_host $mds_dev "-y"
+	run_e2fsck $ost_host $ost_dev "-y"
+
+	# mount the Lustre filesystem again
+	setup
+
+	# check the files
+	log "check files after shrinking the MDT and OST filesystems"
+	for i in $(seq $((num_files + 10))); do
+		file=$MOUNT/$tdir/$tfile-$i
+		$CHECKSTAT -t file -s 1048576 $file ||
+			error "(11) checkstat $file failed"
+	done
+
+	# unmount and reformat the Lustre filesystem
+	cleanup || error "(12) cleanup Lustre filesystem failed"
+	combined_mgs_mds || stop_mgs || error "(13) stop mgs failed"
+	reformat || error "(14) reformat Lustre filesystem failed"
+}
+run_test 78 "run resize2fs on MDT and OST filesystems"
+
 if ! combined_mgs_mds ; then
 	stop mgs
 fi
 
 cleanup_gss
 
+# restore the values of MDSSIZE and OSTSIZE
+MDSSIZE=$STORED_MDSSIZE
+OSTSIZE=$STORED_OSTSIZE
+reformat
+
 complete $SECONDS
 exit_status