X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Ftests%2Fsanity-scrub.sh;h=efbbd3b135936369c4116a736a8d2200cd70ace2;hb=b498499104af17da081f1c22b9c07951104846a3;hp=a5647d3a94eb9ece74145d63ae1f96c52358ffcd;hpb=b59c31057fb3500093d842a8b7c42771d19685b8;p=fs%2Flustre-release.git

diff --git a/lustre/tests/sanity-scrub.sh b/lustre/tests/sanity-scrub.sh
index a5647d3..efbbd3b 100644
--- a/lustre/tests/sanity-scrub.sh
+++ b/lustre/tests/sanity-scrub.sh
@@ -17,10 +17,6 @@ init_test_env $@
 . ${CONFIG:=$LUSTRE/tests/cfg/$NAME.sh}
 init_logging
 
-[ "${MDSFSTYPE:-$FSTYPE}" != "ldiskfs" ] &&
-	skip "test OI scrub only for ldiskfs" && exit 0
-[[ $(lustre_version_code $SINGLEMDS) -ge $(version_code 2.3.0) ]] ||
-	skip "Need MDS version at least 2.3.0" && exit 0
 require_dsh_mds || exit 0
 
 SAVED_MDSSIZE=${MDSSIZE}
@@ -30,40 +26,260 @@ SAVED_OSTSIZE=${OSTSIZE}
 MDSSIZE=100000
 OSTSIZE=100000
 
+MOUNT_2=""
 check_and_setup_lustre
+
+[ $(facet_fstype $SINGLEMDS) != "ldiskfs" ] &&
+	skip "test OI scrub only for ldiskfs" && check_and_cleanup_lustre &&
+	exit 0
+[ $(facet_fstype ost1) != "ldiskfs" ] &&
+	skip "test OI scrub only for ldiskfs" && check_and_cleanup_lustre &&
+	exit 0
+[[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.2.90) ]] &&
+	skip "Need MDS version at least 2.2.90" && check_and_cleanup_lustre &&
+	exit 0
+
+[[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.3.90) ]] &&
+	ALWAYS_EXCEPT="$ALWAYS_EXCEPT 1a"
+
+[[ $(lustre_version_code $SINGLEMDS) -le $(version_code 2.4.1) ]] &&
+	ALWAYS_EXCEPT="$ALWAYS_EXCEPT 15"
+
+[[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.4.90) ]] &&
+[[ $(lustre_version_code $SINGLEMDS) -ge $(version_code 2.4.50) ]] &&
+	ALWAYS_EXCEPT="$ALWAYS_EXCEPT 15"
+
+[[ $(lustre_version_code ost1) -lt $(version_code 2.4.50) ]] &&
+	ALWAYS_EXCEPT="$ALWAYS_EXCEPT 11 12 13 14"
+
 build_test_filter
 
 MDT_DEV="${FSNAME}-MDT0000"
+OST_DEV="${FSNAME}-OST0000"
 MDT_DEVNAME=$(mdsdevname ${SINGLEMDS//mds/})
+
+scrub_start() {
+	local error_id=$1
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL lfsck_start -M $(facet_svc mds$n) "$@" ||
+			error "($error_id) Failed to start OI scrub on mds$n"
+	done
+}
+
+scrub_stop() {
+	local error_id=$1
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL lfsck_stop -M $(facet_svc mds$n) ||
+			error "($error_id) Failed to stop OI scrub on mds$n"
+	done
+}
+
+scrub_status() {
+	local n=$1
+
+	do_facet mds$n $LCTL get_param -n \
+		osd-ldiskfs.$(facet_svc mds$n).oi_scrub
+}
+
 START_SCRUB="do_facet $SINGLEMDS $LCTL lfsck_start -M ${MDT_DEV}"
+START_SCRUB_ON_OST="do_facet ost1 $LCTL lfsck_start -M ${OST_DEV}"
 STOP_SCRUB="do_facet $SINGLEMDS $LCTL lfsck_stop -M ${MDT_DEV}"
 SHOW_SCRUB="do_facet $SINGLEMDS \
 		$LCTL get_param -n osd-ldiskfs.${MDT_DEV}.oi_scrub"
+SHOW_SCRUB_ON_OST="do_facet ost1 \
+		$LCTL get_param -n osd-ldiskfs.${OST_DEV}.oi_scrub"
 MOUNT_OPTS_SCRUB="-o user_xattr"
 MOUNT_OPTS_NOSCRUB="-o user_xattr,noscrub"
 
 scrub_prep() {
 	local nfiles=$1
+	local n
 
 	echo "formatall"
 	formatall > /dev/null
 	echo "setupall"
 	setupall > /dev/null
 
-	echo "preparing... ${nfiles} files will be created."
-	mkdir -p $DIR/$tdir
-	cp $LUSTRE/tests/*.sh $DIR/$tdir/
-	[[ $nfiles -gt 0 ]] && { createmany -o $DIR/$tdir/$tfile $nfiles ||
-				error "createmany failed"; }
-
+	echo "preparing..."
+	for n in $(seq $MDSCOUNT); do
+		echo "creating $nfiles files on mds$n"
+		if [ $n -eq 1 ]; then
+			mkdir -p $DIR/$tdir/mds$n ||
+				error "Failed to create directory mds$n"
+		else
+			$LFS mkdir -i $((n - 1)) $DIR/$tdir/mds$n ||
+				error "Failed to create remote directory mds$n"
+		fi
+		cp $LUSTRE/tests/*.sh $DIR/$tdir/mds$n ||
+			error "Failed to copy files to mds$n"
+		if [[ $nfiles -gt 0 ]]; then
+			createmany -o $DIR/$tdir/mds$n/$tfile $nfiles ||
+				error "createmany failed on mds$n"
+		fi
+	done
 	echo "prepared."
 	cleanup_mount $MOUNT > /dev/null || error "Fail to stop client!"
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "Fail to stop MDS!"
+	for n in $(seq $MDSCOUNT); do
+		echo "stop mds$n"
+		stop mds$n > /dev/null || error "Fail to stop MDS$n!"
+	done
+}
+
+scrub_start_mds() {
+	local error_id=$1
+	local opts=$2
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		start mds$n $(mdsdevname $n) $opts >/dev/null ||
+			error "($error_id) Failed to start mds$n"
+	done
+}
+
+scrub_stop_mds() {
+	local error_id=$1
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		echo "stopping mds$n"
+		stop mds$n >/dev/null ||
+			error "($error_id) Failed to stop mds$n"
+	done
+}
+
+scrub_check_status() {
+	local error_id=$1
+	local expected=$2
+	local actual
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		actual=$(do_facet mds$n $LCTL get_param -n \
+			osd-ldiskfs.$(facet_svc mds$n).oi_scrub |
+			awk '/^status/ { print $2 }')
+		if [ "$actual" != "$expected" ]; then
+			error "($error_id) Expected '$expected' on mds$n, but" \
+			       "got '$actual'"
+		fi
+	done
+}
+
+scrub_check_flags() {
+	local error_id=$1
+	local expected=$2
+	local actual
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		actual=$(do_facet mds$n $LCTL get_param -n \
+			osd-ldiskfs.$(facet_svc mds$n).oi_scrub |
+			awk '/^flags/ { print $2 }')
+		if [ "$actual" != "$expected" ]; then
+			error "($error_id) Expected '$expected' on mds$n, but" \
+			       "got '$actual'"
+		fi
+	done
+}
+
+scrub_check_params() {
+	local error_id=$1
+	local expected=$2
+	local actual
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		actual=$(do_facet mds$n $LCTL get_param -n \
+			osd-ldiskfs.$(facet_svc mds$n).oi_scrub |
+			awk '/^param/ { print $2 }')
+		if [ "$actual" != "$expected" ]; then
+			error "($error_id) Expected '$expected' on mds$n, but" \
+			       "got '$actual'"
+		fi
+	done
+}
+
+scrub_check_repaired() {
+	local error_id=$1
+	local expected=$2
+	local actual
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		actual=$(do_facet mds$n $LCTL get_param -n \
+			osd-ldiskfs.$(facet_svc mds$n).oi_scrub |
+			awk '/^updated/ { print $2 }')
+
+		if [ $expected -eq 0 -a $actual -ne 0 ]; then
+			error "($error_id) Expected no repaired on mds$n, but" \
+			       "got '$actual'"
+		fi
+
+		if [ $expected -ne 0 -a $actual -lt $expected ]; then
+			error "($error_id) Expected '$expected' on mds$n, but" \
+			       "got '$actual'"
+		fi
+	done
+}
+
+scrub_check_data() {
+	local error_id=$1
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		diff -q $LUSTRE/tests/test-framework.sh \
+			$DIR/$tdir/mds$n/test-framework.sh ||
+			error "($error_id) File data check failed"
+	done
+}
+
+scrub_remove_ois() {
+	local error_id=$1
+	local index=$2
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		mds_remove_ois mds$n $index ||
+			error "($error_id) Failed to remove OI .$index on mds$n"
+	done
+}
+
+scrub_backup_restore() {
+	local error_id=$1
+	local igif=$2
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		mds_backup_restore mds$n $igif ||
+			error "(error_id) Backup/restore on mds$n failed"
+	done
+}
+
+scrub_enable_auto() {
+	local n
+
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL set_param -n \
+			osd-ldiskfs.$(facet_svc mds$n).auto_scrub 1
+	done
 }
 
 test_0() {
 	scrub_prep 0
+	echo "starting MDTs without disabling OI scrub"
+	scrub_start_mds 1 "$MOUNT_OPTS_SCRUB"
+	scrub_check_status 2 init
+	scrub_check_flags 3 ""
+	mount_client $MOUNT || error "(4) Fail to start client!"
+	scrub_check_data 5
+}
+run_test 0 "Do not auto trigger OI scrub for non-backup/restore case"
+
+test_1a() {
+	scrub_prep 0
 	echo "start $SINGLEMDS without disabling OI scrub"
 	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
 		error "(1) Fail to start MDS!"
@@ -77,32 +293,44 @@ test_0() {
 
 	mount_client $MOUNT || error "(4) Fail to start client!"
 
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(5) File diff failed unexpected!"
-}
-run_test 0 "Do not auto trigger OI scrub for non-backup/restore case"
+	#define OBD_FAIL_OSD_FID_MAPPING			0x193
+	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x193
+	# update .lustre OI mapping
+	touch $MOUNT/.lustre
+	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
 
-test_1a() {
-	scrub_prep 0
-	mds_remove_ois || error "(1) Fail to remove/recreate!"
+	umount_client $MOUNT || error "(5) Fail to stop client!"
 
-	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
+	echo "stop $SINGLEMDS"
+	stop $SINGLEMDS > /dev/null || error "(6) Fail to stop MDS!"
 
-	sleep 3
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(3) Expect 'completed', but got '$STATUS'"
+	echo "start $SINGLEMDS with disabling OI scrub"
+	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
+		error "(7) Fail to start MDS!"
 
-	mount_client $MOUNT || error "(4) Fail to start client!"
+	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
+	[ "$STATUS" == "init" ] ||
+		error "(8) Expect 'init', but got '$STATUS'"
 
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(5) File diff failed unexpected!"
+	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
+	[ "$FLAGS" == "inconsistent" ] ||
+		error "(9) Expect 'inconsistent', but got '$FLAGS'"
 }
-run_test 1a "Trigger OI scrub when MDT mounts for OI files remove/recreate case"
+run_test 1a "Auto trigger initial OI scrub when server mounts"
 
 test_1b() {
+	scrub_prep 0
+	scrub_remove_ois 1
+	echo "start MDTs without disabling OI scrub"
+	scrub_start_mds 2 "$MOUNT_OPTS_SCRUB"
+	sleep 3
+	scrub_check_status 3 completed
+	mount_client $MOUNT || error "(4) Fail to start client!"
+	scrub_check_data 5
+}
+run_test 1b "Trigger OI scrub when MDT mounts for OI files remove/recreate case"
+
+test_1c() {
 	local index
 
 	# OI files to be removed:
@@ -114,64 +342,39 @@ test_1b() {
 	# idx 7: oi.16.{7,49}
 	for index in 0 1 2 3 5 7; do
 		scrub_prep 0
-		mds_remove_ois ${index} || error "(1) Fail to remove/recreate!"
+		scrub_remove_ois 1 $index
 
-		echo "start $SINGLEMDS with disabling OI scrub"
-		start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > \
-			/dev/null || error "(2) Fail to start MDS!"
-
-		local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-		[ "$FLAGS" == "recreated" ] ||
-			error "(3) Expect 'recreated', but got '$STATUS'"
-
-		$START_SCRUB || error "(4) Fail to start OI scrub!"
+		echo "start MDTs with OI scrub disabled"
+		scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+		scrub_check_flags 3 recreated
+		scrub_start 4
 		sleep 3
-		local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-		[ "$STATUS" == "completed" ] ||
-			error "(5) Expect 'completed', but got '$STATUS'"
-
-		FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-		[ -z "$FLAGS" ] ||
-			error "(6) Expect empty flags, but got '$FLAGS'"
+		scrub_check_status 5 completed
+		scrub_check_flags 6 ""
 	done
 }
-run_test 1b "Auto detect kinds of OI file(s) removed/recreated cases"
+run_test 1c "Auto detect kinds of OI file(s) removed/recreated cases"
 
 test_2() {
 	scrub_prep 0
-	mds_backup_restore || error "(1) Fail to backup/restore!"
-
-	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
-
+	scrub_backup_restore 1
+	echo "starting MDTs without disabling OI scrub"
+	scrub_start_mds 2 "$MOUNT_OPTS_SCRUB"
 	sleep 3
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(3) Expect 'completed', but got '$STATUS'"
-
+	scrub_check_status 3 completed
 	mount_client $MOUNT || error "(4) Fail to start client!"
-
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(5) File diff failed unexpected!"
+	scrub_check_data 5
 }
 run_test 2 "Trigger OI scrub when MDT mounts for backup/restore case"
 
 test_3() {
 	scrub_prep 0
-	mds_backup_restore || error "(1) Fail to backup/restore!"
-
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
-
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
-
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
+	scrub_backup_restore 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	sleep 3
+	scrub_check_status 3 init
+	scrub_check_flags 4 inconsistent
 	echo "stopall"
 	stopall > /dev/null
 }
@@ -179,307 +382,265 @@ run_test 3 "Do not trigger OI scrub when MDT mounts if 'noscrub' specified"
 
 test_4() {
 	scrub_prep 0
-	mds_backup_restore || error "(1) Fail to backup/restore!"
-
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
-
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
-
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
-
+	scrub_backup_restore 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_status 3 init
+	scrub_check_flags 4 inconsistent
 	mount_client $MOUNT || error "(5) Fail to start client!"
-
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n osd-ldiskfs.${MDT_DEV}.auto_scrub 1
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(6) File diff failed unexpected!"
-
+	scrub_enable_auto
+	scrub_check_data 6
 	sleep 3
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(7) Expect 'completed', but got '$STATUS'"
+	scrub_check_status 7 completed
 }
 run_test 4 "Trigger OI scrub automatically if inconsistent OI mapping was found"
 
 test_5() {
 	scrub_prep 1500
-	mds_backup_restore || error "(1) Fail to backup/restore!"
-
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
-
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
-
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
-
+	scrub_backup_restore 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_status 3 init
+	scrub_check_flags 4 inconsistent
 	mount_client $MOUNT || error "(5) Fail to start client!"
+	scrub_enable_auto
 
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n osd-ldiskfs.${MDT_DEV}.auto_scrub 1
-	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(6) File diff failed unexpected!"
+	local n
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
+		do_facet mds$n $LCTL set_param fail_val=3
+		do_facet mds$n $LCTL set_param fail_loc=0x190
+	done
+	scrub_check_data 6
 
 	umount_client $MOUNT || error "(7) Fail to stop client!"
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(8) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 8 scanning
 
-	#define OBD_FAIL_OSD_SCRUB_CRASH	 0x191
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x80000191
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_CRASH	 0x191
+		do_facet mds$n $LCTL set_param fail_loc=0x191
+	done
 	sleep 4
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(9) Fail to stop MDS!"
+	scrub_stop_mds 9
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(10) Fail to start MDS!"
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL set_param fail_loc=0
+		do_facet mds$n $LCTL set_param fail_val=0
+	done
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "crashed" ] ||
-		error "(11) Expect 'crashed', but got '$STATUS'"
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 10 "$MOUNT_OPTS_NOSCRUB"
 
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(12) Fail to stop MDS!"
+	scrub_check_status 11 crashed
 
-	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(13) Fail to start MDS!"
+	scrub_stop_mds 12
+
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
+		do_facet mds$n $LCTL set_param fail_val=3
+		do_facet mds$n $LCTL set_param fail_loc=0x190
+	done
+	echo "starting MDTs without disabling OI scrub"
+	scrub_start_mds 13 "$MOUNT_OPTS_SCRUB"
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(14) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 14 scanning
 
-	#define OBD_FAIL_OSD_SCRUB_FATAL	 0x192
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x80000192
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_FATAL	 0x192
+		do_facet mds$n $LCTL set_param fail_loc=0x192
+	done
 	sleep 4
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "failed" ] ||
-		error "(15) Expect 'failed', but got '$STATUS'"
+	scrub_check_status 15 failed
 
 	mount_client $MOUNT || error "(16) Fail to start client!"
 
-	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	stat $DIR/$tdir/${tfile}1000 ||
-		error "(17) Fail to stat $DIR/$tdir/${tfile}1000!"
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
+		do_facet mds$n $LCTL set_param fail_val=3
+		do_facet mds$n $LCTL set_param fail_loc=0x190
+		stat $DIR/$tdir/mds$n/${tfile}1000 ||
+			error "(17) Failed to stat mds$n/${tfile}1000"
+	done
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(18) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 18 scanning
 
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
-	do_facet $SINGLEMDS $LCTL set_param fail_val=0
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL set_param fail_loc=0
+		do_facet mds$n $LCTL set_param fail_val=0
+	done
 	sleep 5
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(19) Expect 'completed', but got '$STATUS'"
+	scrub_check_status 19 completed
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(20) Expect empty flags, but got '$FLAGS'"
+	scrub_check_flags 20 ""
 }
 run_test 5 "OI scrub state machine"
 
 test_6() {
 	scrub_prep 1000
-	mds_backup_restore || error "(1) Fail to backup/restore!"
-
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
-
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
-
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
-
+	scrub_backup_restore 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_status 3 init
+	scrub_check_flags 4 inconsistent
 	mount_client $MOUNT || error "(5) Fail to start client!"
-
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n osd-ldiskfs.${MDT_DEV}.auto_scrub 1
-	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(6) File diff failed unexpected!"
+	scrub_enable_auto
+	local n
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
+		do_facet mds$n $LCTL set_param fail_val=3
+		do_facet mds$n $LCTL set_param fail_loc=0x190
+	done
+	scrub_check_data 6
 
 	# Sleep 5 sec to guarantee at least one object processed by OI scrub
 	sleep 5
 	# Fail the OI scrub to guarantee there is at least one checkpoint
-	#define OBD_FAIL_OSD_SCRUB_FATAL	 0x192
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x80000192
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_FATAL	 0x192
+		do_facet mds$n $LCTL set_param fail_loc=0x192
+	done
 	sleep 4
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "failed" ] ||
-		error "(7) Expect 'failed', but got '$STATUS'"
-
-	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	# stat will re-trigger OI scrub
-	stat $DIR/$tdir/${tfile}800 ||
-		error "(8) Fail to stat $DIR/$tdir/${tfile}800!"
+	scrub_check_status 7 failed
+
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
+		do_facet mds$n $LCTL set_param fail_val=3
+		do_facet mds$n $LCTL set_param fail_loc=0x190
+		# stat will re-trigger OI scrub
+		stat $DIR/$tdir/mds$n/${tfile}800 ||
+			error "(8) Failed to stat mds$n/${tfile}800"
+	done
 
 	umount_client $MOUNT || error "(9) Fail to stop client!"
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(10) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 10 scanning
 
-	#define OBD_FAIL_OSD_SCRUB_CRASH	 0x191
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x80000191
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_CRASH	 0x191
+		do_facet mds$n $LCTL set_param fail_loc=0x191
+	done
 	sleep 4
-	local POSITION0=$($SHOW_SCRUB |
+	local -a position0
+	for n in $(seq $MDSCOUNT); do
+		position0[$n]=$(scrub_status $n |
 			awk '/^last_checkpoint_position/ {print $2}')
-	POSITION0=$((POSITION0 + 1))
+		position0[$n]=$((${position0[$n]} + 1))
+	done
 
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(11) Fail to stop MDS!"
+	scrub_stop_mds 11
 
-	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(12) Fail to start MDS!"
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
+		do_facet mds$n $LCTL set_param fail_val=3
+		do_facet mds$n $LCTL set_param fail_loc=0x190
+	done
+	echo "starting MDTs without disabling OI scrub"
+	scrub_start_mds 12 "$MOUNT_OPTS_SCRUB"
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(13) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 13 scanning
 
-	local POSITION1=$($SHOW_SCRUB |
+	local -a position1
+	for n in $(seq $MDSCOUNT); do
+		positions1[$n]=$(scrub_status $n |
 			awk '/^latest_start_position/ {print $2}')
-	[ $POSITION0 -eq $POSITION1 ] ||
-		error "(14) Expect position: $POSITION0, but got $POSITION1"
+		if [ ${position0[$n]} -ne ${position1[$n]} ]; then
+			error "(14) Expected position ${position0[$n]}, but" \
+				"got ${position1[$n]}"
+		fi
+	done
 
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
-	do_facet $SINGLEMDS $LCTL set_param fail_val=0
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL set_param fail_loc=0
+		do_facet mds$n $LCTL set_param fail_val=0
+	done
 	sleep 5
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(15) Expect 'completed', but got '$STATUS'"
+	scrub_check_status 15 completed
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(16) Expect empty flags, but got '$FLAGS'"
+	scrub_check_flags 16 ""
 }
 run_test 6 "OI scrub resumes from last checkpoint"
 
 test_7() {
-	scrub_prep 500
-	mds_backup_restore || error "(1) Fail to backup/restore!"
+	# skip test_7 for LU-4149
+	[ $MDSCOUNT -ge 2 ] && skip "skip now for >= 2 MDTs" && return
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
-
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
+	scrub_prep 500
+	scrub_backup_restore 1
 
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_status 3 init
+	scrub_check_flags 4 inconsistent
 
 	mount_client $MOUNT || error "(5) Fail to start client!"
 
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n osd-ldiskfs.${MDT_DEV}.auto_scrub 1
-	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(6) File diff failed unexpected!"
+	scrub_enable_auto
+	local n
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
+		do_facet mds$n $LCTL set_param fail_val=3
+		do_facet mds$n $LCTL set_param fail_loc=0x190
+	done
+	scrub_check_data 6
 
-	stat $DIR/$tdir/${tfile}300 ||
-		error "(7) Fail to stat $DIR/$tdir/${tfile}300!"
+	for n in $(seq $MDSCOUNT); do
+		stat $DIR/$tdir/mds$n/${tfile}300 ||
+			error "(7) Failed to stat mds$n/${tfile}300!"
+	done
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(8) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 8 scanning
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent,auto" ] ||
-		error "(9) Expect 'inconsistent,auto', but got '$FLAGS'"
+	scrub_check_flags 9 inconsistent,auto
 
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
-	do_facet $SINGLEMDS $LCTL set_param fail_val=0
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL set_param fail_loc=0
+		do_facet mds$n $LCTL set_param fail_val=0
+	done
 	sleep 5
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(10) Expect 'completed', but got '$STATUS'"
+	scrub_check_status 10 completed
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(11) Expect empty flags, but got '$FLAGS'"
+	scrub_check_flags ""
 }
 run_test 7 "System is available during OI scrub scanning"
 
 test_8() {
-	scrub_prep 0
-	mds_backup_restore || error "(1) Fail to backup/restore!"
+	scrub_prep 128
+	scrub_backup_restore 1
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
 
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
+	scrub_check_status 3 init
 
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
+	scrub_check_flags 4 inconsistent
 
-	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	$START_SCRUB || error "(5) Fail to start OI scrub!"
+	local n
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
+		do_facet mds$n $LCTL set_param fail_val=1
+		do_facet mds$n $LCTL set_param fail_loc=0x190
+	done
+	scrub_start 5
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(6) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 6 scanning
 
-	$STOP_SCRUB || error "(7) Fail to stop OI scrub!"
+	scrub_stop 7
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "stopped" ] ||
-		error "(8) Expect 'stopped', but got '$STATUS'"
+	scrub_check_status 8 stopped
 
-	$START_SCRUB || error "(9) Fail to start OI scrub!"
+	scrub_start 9
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(10) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 10 scanning
 
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
-	do_facet $SINGLEMDS $LCTL set_param fail_val=0
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL set_param fail_loc=0
+		do_facet mds$n $LCTL set_param fail_val=0
+	done
 	sleep 5
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(11) Expect 'completed', but got '$STATUS'"
+	scrub_check_status 11 completed
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(12) Expect empty flags, but got '$FLAGS'"
+	scrub_check_flags 12 ""
 }
 run_test 8 "Control OI scrub manually"
 
@@ -490,240 +651,406 @@ test_9() {
 	fi
 
 	scrub_prep 8000
-	mds_backup_restore || error "(1) Fail to backup/restore!"
+	scrub_backup_restore 1
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
 
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
+	scrub_check_status 3 init
 
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
+	scrub_check_flags 4 inconsistent
 
+	local BASE_SPEED1=100
+	local RUN_TIME1=10
 	# OI scrub should run with full speed under inconsistent case
-	$START_SCRUB -s 100 || error "(5) Fail to start OI scrub!"
+	scrub_start 5 -s $BASE_SPEED1
 
-	sleep 10
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(6) Expect 'completed', but got '$STATUS'"
+	sleep $RUN_TIME1
+	scrub_check_status 6 completed
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(7) Expect empty flags, but got '$FLAGS'"
+	scrub_check_flags 7 ""
 
 	# OI scrub should run with limited speed under non-inconsistent case
-	$START_SCRUB -s 100 -r || error "(8) Fail to start OI scrub!"
-
-	sleep 10
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(9) Expect 'scanning', but got '$STATUS'"
-
-	# Do NOT ignore that there are 1024 pre-fetched items.
-	# So the max speed may be (1024 + 100 * 10) / 10.
-	# And there may be time error, so the max speed may be more large.
-	local SPEED=$($SHOW_SCRUB | awk '/^average_speed/ { print $2 }')
-	[ $SPEED -gt 220 ] &&
-		error "(10) Unexpected speed $SPEED, should not more than 220"
+	scrub_start 8 -s $BASE_SPEED1 -r
+
+	sleep $RUN_TIME1
+	scrub_check_status 9 scanning
+
+	# Do NOT ignore that there are 1024 pre-fetched items. And there
+	# may be time error, normally it should be less than 2 seconds.
+	# We allow another 20% schedule error.
+	local PRE_FETCHED=1024
+	local TIME_DIFF=2
+	# MAX_MARGIN = 1.2 = 12 / 10
+	local MAX_SPEED=$(((PRE_FETCHED + BASE_SPEED1 * \
+		(RUN_TIME1 + TIME_DIFF)) / RUN_TIME1 * 12 / 10))
+	local n
+	for n in $(seq $MDSCOUNT); do
+		local SPEED=$(scrub_status $n | \
+			awk '/^average_speed/ { print $2 }')
+		[ $SPEED -lt $MAX_SPEED ] ||
+			error "(10) Got speed $SPEED, expected less than" \
+				"$MAX_SPEED"
+	done
 
 	# adjust speed limit
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n mdd.${MDT_DEV}.lfsck_speed_limit 300
-	sleep 10
-
-	SPEED=$($SHOW_SCRUB | awk '/^average_speed/ { print $2 }')
-	[ $SPEED -lt 220 ] &&
-		error "(11) Unexpected speed $SPEED, should not less than 220"
-
-	[ $SPEED -gt 300 ] &&
-		error "(12) Unexpected speed $SPEED, should not more than 300"
-
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n mdd.${MDT_DEV}.lfsck_speed_limit 0
+	local BASE_SPEED2=300
+	local RUN_TIME2=10
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL set_param -n \
+			mdd.$(facet_svc mds$n).lfsck_speed_limit $BASE_SPEED2
+	done
+	sleep $RUN_TIME2
+
+	# MIN_MARGIN = 0.8 = 8 / 10
+	local MIN_SPEED=$(((PRE_FETCHED + \
+			    BASE_SPEED1 * (RUN_TIME1 - TIME_DIFF) + \
+			    BASE_SPEED2 * (RUN_TIME2 - TIME_DIFF)) / \
+			   (RUN_TIME1 + RUN_TIME2) * 8 / 10))
+	# MAX_MARGIN = 1.2 = 12 / 10
+	MAX_SPEED=$(((PRE_FETCHED + \
+		      BASE_SPEED1 * (RUN_TIME1 + TIME_DIFF) + \
+		      BASE_SPEED2 * (RUN_TIME2 + TIME_DIFF)) / \
+		     (RUN_TIME1 + RUN_TIME2) * 12 / 10))
+	for n in $(seq $MDSCOUNT); do
+		SPEED=$(scrub_status $n | awk '/^average_speed/ { print $2 }')
+		[ $SPEED -gt $MIN_SPEED ] ||
+			error "(11) Got speed $SPEED, expected more than" \
+				"$MIN_SPEED"
+		[ $SPEED -lt $MAX_SPEED ] ||
+			error "(12) Got speed $SPEED, expected less than" \
+				"$MAX_SPEED"
+
+		do_facet mds$n $LCTL set_param -n \
+				mdd.$(facet_svc mds$n).lfsck_speed_limit 0
+	done
 	sleep 6
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(13) Expect 'completed', but got '$STATUS'"
+	scrub_check_status 13 completed
 }
 run_test 9 "OI scrub speed control"
 
 test_10a() {
 	scrub_prep 0
-	mds_backup_restore || error "(1) Fail to backup/restore!"
+	scrub_backup_restore 1
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
+	echo "starting mds$n with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
 
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
+	scrub_check_status 3 init
 
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
+	scrub_check_flags 4 inconsistent
 
 	mount_client $MOUNT || error "(5) Fail to start client!"
 
-	do_facet $SINGLEMDS \
-		$LCTL set_param -n osd-ldiskfs.${MDT_DEV}.auto_scrub 1
-	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
-	diff -q $LUSTRE/tests/test-framework.sh $DIR/$tdir/test-framework.sh ||
-		error "(6) File diff failed unexpected!"
+	scrub_enable_auto
+	local n
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
+		do_facet mds$n $LCTL set_param fail_val=1
+		do_facet mds$n $LCTL set_param fail_loc=0x190
+	done
+	scrub_check_data 6
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(7) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 7 scanning
 
 	umount_client $MOUNT || error "(8) Fail to stop client!"
 
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(9) Fail to stop MDS!"
+	scrub_stop_mds 9
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(10) Fail to start MDS!"
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 10 "$MOUNT_OPTS_NOSCRUB"
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "paused" ] ||
-		error "(11) Expect 'paused', but got '$STATUS'"
+	scrub_check_status 11 paused
 
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(12) Fail to stop MDS!"
+	scrub_stop_mds 12
 
-	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(13) Fail to start MDS!"
+	echo "starting MDTs without disabling OI scrub"
+	scrub_start_mds 13 "$MOUNT_OPTS_SCRUB"
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(14) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 14 scanning
 
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
-	do_facet $SINGLEMDS $LCTL set_param fail_val=0
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL set_param fail_loc=0
+		do_facet mds$n $LCTL set_param fail_val=0
+	done
 	sleep 5
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(15) Expect 'completed', but got '$STATUS'"
+	scrub_check_status 15 completed
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(16) Expect empty flags, but got '$FLAGS'"
+	scrub_check_flags 16 ""
 }
 run_test 10a "non-stopped OI scrub should auto restarts after MDS remount (1)"
 
+# test_10b is obsolete, it will be coverded by related sanity-lfsck tests.
 test_10b() {
 	scrub_prep 0
-	mds_backup_restore || error "(1) Fail to backup/restore!"
+	scrub_backup_restore 1
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(2) Fail to start MDS!"
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
 
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "init" ] ||
-		error "(3) Expect 'init', but got '$STATUS'"
+	scrub_check_status 3 init
 
-	local FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ "$FLAGS" == "inconsistent" ] ||
-		error "(4) Expect 'inconsistent', but got '$FLAGS'"
+	scrub_check_flags 4 inconsistent
 
-	#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
-	do_facet $SINGLEMDS $LCTL set_param fail_val=3
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0x190
+	local n
+	for n in $(seq $MDSCOUNT); do
+		#define OBD_FAIL_OSD_SCRUB_DELAY	 0x190
+		do_facet mds$n $LCTL set_param fail_val=3
+		do_facet mds$n $LCTL set_param fail_loc=0x190
+	done
 
-	$START_SCRUB || error "(5) Fail to start OI scrub!"
+	scrub_start 5
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(6) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 6 scanning
 
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(7) Fail to stop MDS!"
+	scrub_stop_mds 7
 
-	echo "start $SINGLEMDS with disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_NOSCRUB > /dev/null ||
-		error "(8) Fail to start MDS!"
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 8 "$MOUNT_OPTS_NOSCRUB"
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "paused" ] ||
-		error "(9) Expect 'paused', but got '$STATUS'"
+	scrub_check_status 9 paused
 
-	echo "stop $SINGLEMDS"
-	stop $SINGLEMDS > /dev/null || error "(10) Fail to stop MDS!"
+	scrub_stop_mds 10
 
-	echo "start $SINGLEMDS without disabling OI scrub"
-	start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
-		error "(11) Fail to start MDS!"
+	echo "starting MDTs without disabling OI scrub"
+	scrub_start_mds 11 "$MOUNT_OPTS_SCRUB"
 
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "scanning" ] ||
-		error "(12) Expect 'scanning', but got '$STATUS'"
+	scrub_check_status 12 scanning
 
-	do_facet $SINGLEMDS $LCTL set_param fail_loc=0
-	do_facet $SINGLEMDS $LCTL set_param fail_val=0
+	for n in $(seq $MDSCOUNT); do
+		do_facet mds$n $LCTL set_param fail_loc=0
+		do_facet mds$n $LCTL set_param fail_val=0
+	done
 	sleep 5
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(13) Expect 'completed', but got '$STATUS'"
+	scrub_check_status 13 completed
 
-	FLAGS=$($SHOW_SCRUB | awk '/^flags/ { print $2 }')
-	[ -z "$FLAGS" ] || error "(14) Expect empty flags, but got '$FLAGS'"
+	scrub_check_flags 14 ""
 }
-run_test 10b "non-stopped OI scrub should auto restarts after MDS remount (2)"
+#run_test 10b "non-stopped OI scrub should auto restarts after MDS remount (2)"
 
 test_11() {
 	echo "stopall"
 	stopall > /dev/null
+	echo "formatall"
+	formatall > /dev/null
 	echo "setupall"
 	setupall > /dev/null
 
+	local CREATED=100
 	local tname=`date +%s`
 	rm -rf $MOUNT/$tname > /dev/null
-	mkdir $MOUNT/$tname || error "(1) Fail to mkdir $MOUNT/$tname"
-
-	createmany -o $MOUNT/$tname/f 100 || error "(2) Fail to create!"
+	mkdir -p $MOUNT/$tname || error "(0) Failed to create $MOUNT/$tname"
+	local n
+	for n in $(seq $MDSCOUNT); do
+		$LFS mkdir -i $((n - 1)) $MOUNT/$tname/mds$n ||
+			error "(1) Fail to mkdir $MOUNT/$tname/mds$n"
+
+		createmany -o $MOUNT/$tname/mds$n/f $CREATED ||
+			error "(2) Fail to create in $tname/mds$n"
+	done
 
+	cleanup_mount $MOUNT
+	do_facet $SINGLEMDS $LCTL clear
+	start_full_debug_logging
 	# reset OI scrub start point by force
-	$START_SCRUB -r || error "(3) Fail to start OI scrub!"
+	scrub_start 3 -r
 	sleep 3
-	local STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(4) Expect 'completed', but got '$STATUS'"
+	scrub_check_status 4 completed
 
 	# OI scrub should skip the new created objects for the first accessing
-	local SKIPPED=$($SHOW_SCRUB | awk '/^noscrub/ { print $2 }')
-	[ $SKIPPED -eq 101 ] ||
-		error "(5) Expect 101 objects skipped, but got $SKIPPED"
+	# notice we're creating a new llog for every OST on every startup
+	# new features can make this even less stable, so we only check
+	# that the number of skipped files is less than 2x the number of files
+	local MAXIMUM=$((CREATED * 2))
+	local MINIMUM=$((CREATED + 1)) # files + directory
+	for n in $(seq $MDSCOUNT); do
+		local SKIPPED=$(scrub_status $n | awk '/^noscrub/ { print $2 }')
+		[ $SKIPPED -ge $MAXIMUM -o $SKIPPED -lt $MINIMUM ] &&
+			error "(5) Expect [ $MINIMUM , $MAXIMUM ) objects" \
+				"skipped on mds$n, but got $SKIPPED"
+	done
 
 	# reset OI scrub start point by force
-	$START_SCRUB -r || error "(6) Fail to start OI scrub!"
+	scrub_start -r
 	sleep 3
-	STATUS=$($SHOW_SCRUB | awk '/^status/ { print $2 }')
-	[ "$STATUS" == "completed" ] ||
-		error "(7) Expect 'completed', but got '$STATUS'"
+	scrub_check_status 7 completed
 
 	# OI scrub should skip the new created object only once
-	SKIPPED=$($SHOW_SCRUB | awk '/^noscrub/ { print $2 }')
-	[ $SKIPPED -eq 0 ] ||
-		error "(8) Expect 0 objects skipped, but got $SKIPPED"
+	for n in $(seq $MDSCOUNT); do
+		SKIPPED=$(scrub_status $n | awk '/^noscrub/ { print $2 }')
+		[ $SKIPPED -eq 0 ] ||
+			error "(8) Expect 0 objects skipped on mds$n, but" \
+				"got $SKIPPED"
+	done
 
+	stop_full_debug_logging
+	restore_mount $MOUNT || error "(9) Fail to start client!"
 	rm -rf $MOUNT/$tname > /dev/null
 }
 run_test 11 "OI scrub skips the new created objects only once"
 
-# restore the ${facet}_MKFS_OPTS variables
-for facet in MGS MDS OST; do
-	opts=SAVED_${facet}_MKFS_OPTS
-	if [[ -n ${!opts} ]]; then
-		eval ${facet}_MKFS_OPTS=\"${!opts}\"
-	fi
-done
+test_12() {
+	echo "stopall"
+	stopall > /dev/null
+	echo "formatall"
+	formatall > /dev/null
+	echo "setupall"
+	setupall > /dev/null
+
+	mkdir -p $DIR/$tdir
+	$SETSTRIPE -c 1 -i 0 $DIR/$tdir
+
+	#define OBD_FAIL_OSD_COMPAT_INVALID_ENTRY		0x195
+	do_facet ost1 $LCTL set_param fail_loc=0x195
+	createmany -o $DIR/$tdir/f 1000
+
+	echo "stopall"
+	stopall > /dev/null
+	echo "setupall"
+	setupall > /dev/null
+
+	do_facet ost1 $LCTL set_param fail_loc=0
+	local STATUS=$($SHOW_SCRUB_ON_OST | awk '/^status/ { print $2 }')
+	[ "$STATUS" == "init" ] ||
+		error "(1) Expect 'init', but got '$STATUS'"
+
+	ls -ail $DIR/$tdir > /dev/null 2>&1 && error "(2) ls should fail"
+
+	sleep 3
+	local STATUS=$($SHOW_SCRUB_ON_OST | awk '/^status/ { print $2 }')
+	[ "$STATUS" == "completed" ] ||
+		error "(3) Expect 'completed', but got '$STATUS'"
+
+	ls -ail $DIR/$tdir > /dev/null 2>&1 || error "(4) ls should succeed"
+}
+run_test 12 "OI scrub can rebuild invalid /O entries"
+
+test_13() {
+	echo "stopall"
+	stopall > /dev/null
+	echo "formatall"
+	formatall > /dev/null
+	echo "setupall"
+	setupall > /dev/null
+
+	mkdir -p $DIR/$tdir
+	$SETSTRIPE -c 1 -i 0 $DIR/$tdir
+
+	#define OBD_FAIL_OSD_COMPAT_NO_ENTRY		0x196
+	do_facet ost1 $LCTL set_param fail_loc=0x196
+	createmany -o $DIR/$tdir/f 1000
+	do_facet ost1 $LCTL set_param fail_loc=0
+
+	echo "stopall"
+	stopall > /dev/null
+	echo "setupall"
+	setupall > /dev/null
+
+	local STATUS=$($SHOW_SCRUB_ON_OST | awk '/^status/ { print $2 }')
+	[ "$STATUS" == "init" ] ||
+		error "(1) Expect 'init', but got '$STATUS'"
+
+	ls -ail $DIR/$tdir > /dev/null 2>&1 && error "(2) ls should fail"
+
+	$START_SCRUB_ON_OST || error "(3) Fail to start OI scrub on OST!"
+	sleep 3
+	local STATUS=$($SHOW_SCRUB_ON_OST | awk '/^status/ { print $2 }')
+	[ "$STATUS" == "completed" ] ||
+		error "(4) Expect 'completed', but got '$STATUS'"
+
+	ls -ail $DIR/$tdir > /dev/null 2>&1 || error "(5) ls should succeed"
+}
+run_test 13 "OI scrub can rebuild missed /O entries"
+
+test_14() {
+	echo "stopall"
+	stopall > /dev/null
+	echo "formatall"
+	formatall > /dev/null
+	echo "setupall"
+	setupall > /dev/null
+
+	mkdir -p $DIR/$tdir
+	$SETSTRIPE -c 1 -i 0 $DIR/$tdir
+
+	#define OBD_FAIL_OSD_COMPAT_NO_ENTRY		0x196
+	do_facet ost1 $LCTL set_param fail_loc=0x196
+	createmany -o $DIR/$tdir/f 64
+	do_facet ost1 $LCTL set_param fail_loc=0
+
+	echo "stopall"
+	stopall > /dev/null
+	echo "setupall"
+	setupall > /dev/null
+
+	local STATUS=$($SHOW_SCRUB_ON_OST | awk '/^status/ { print $2 }')
+	[ "$STATUS" == "init" ] ||
+		error "(1) Expect 'init', but got '$STATUS'"
+
+	ls -ail $DIR/$tdir > /dev/null 2>&1 && error "(2) ls should fail"
+
+	echo "stopall"
+	stopall > /dev/null
+
+	echo "run e2fsck"
+	run_e2fsck $(facet_host ost1) $(ostdevname 1) "-y" ||
+		error "(3) Fail to run e2fsck error"
+
+	echo "setupall"
+	setupall > /dev/null
+
+	local LF_REPAIRED=$($SHOW_SCRUB_ON_OST |
+			    awk '/^lf_reparied/ { print $2 }')
+	[ $LF_REPAIRED -gt 0 ] ||
+		error "(4) Some entry under /lost+found should be repaired"
+
+	ls -ail $DIR/$tdir > /dev/null 2>&1 || error "(5) ls should succeed"
+}
+run_test 14 "OI scrub can repair objects under lost+found"
+
+test_15() {
+	# skip test_15 for LU-4182
+	[ $MDSCOUNT -ge 2 ] && skip "skip now for >= 2 MDTs" && return
+	scrub_prep 20
+	scrub_backup_restore 1
+	echo "starting MDTs with OI scrub disabled"
+	scrub_start_mds 2 "$MOUNT_OPTS_NOSCRUB"
+	scrub_check_status 3 init
+	scrub_check_flags 4 inconsistent
+
+	# run under dryrun mode
+	scrub_start 5 -n on
+	sleep 3
+	scrub_check_status 6 completed
+	scrub_check_flags 7 inconsistent
+	scrub_check_params 8 dryrun
+	scrub_check_repaired 9 20
+
+	# run under dryrun mode again
+	scrub_start 10 -n on
+	sleep 3
+	scrub_check_status 11 completed
+	scrub_check_flags 12 inconsistent
+	scrub_check_params 13 dryrun
+	scrub_check_repaired 14 20
+
+	# run under normal mode
+	scrub_start 15 -n off
+	sleep 3
+	scrub_check_status 16 completed
+	scrub_check_flags 17 ""
+	scrub_check_params 18 ""
+	scrub_check_repaired 19 20
+
+	# run under normal mode again
+	scrub_start 20 -n off
+	sleep 3
+	scrub_check_status 21 completed
+	scrub_check_flags 22 ""
+	scrub_check_params 23 ""
+	scrub_check_repaired 24 0
+}
+run_test 15 "Dryrun mode OI scrub"
 
 # restore MDS/OST size
 MDSSIZE=${SAVED_MDSSIZE}
@@ -732,5 +1059,5 @@ OSTSIZE=${SAVED_OSTSIZE}
 # cleanup the system at last
 formatall
 
-complete $(basename $0) $SECONDS
+complete $SECONDS
 exit_status