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LU-3350 tests: allow test-error for lfsck/scrub speed
[fs/lustre-release.git] / lustre / tests / sanity-lfsck.sh
index 6163542..066aca3 100644 (file)
@@ -47,6 +47,7 @@ MOUNT_OPTS_NOSCRUB="-o user_xattr,noscrub"
 lfsck_prep() {
        local ndirs=$1
        local nfiles=$2
+       local igif=$3
 
        echo "formatall"
        formatall > /dev/null
@@ -54,9 +55,14 @@ lfsck_prep() {
        echo "setupall"
        setupall > /dev/null
 
+       if [ ! -z $igif ]; then
+               #define OBD_FAIL_FID_IGIF       0x1504
+               do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1504
+       fi
+
        echo "preparing... ${nfiles} * ${ndirs} files will be created."
        mkdir -p $DIR/$tdir
-       cp $LUSTRE/tests/*.sh $DIR/$tdir/
+       cp $LUSTRE/tests/*.sh $DIR/
        for ((i=0; i<${ndirs}; i++)); do
                mkdir $DIR/$tdir/d${i}
                touch $DIR/$tdir/f${i}
@@ -66,6 +72,11 @@ lfsck_prep() {
                mkdir $DIR/$tdir/e${i}
        done
 
+       if [ ! -z $igif ]; then
+               touch $DIR/$tdir/dummy
+               do_facet $SINGLEMDS $LCTL set_param fail_loc=0
+       fi
+
        echo "prepared."
        cleanup_mount $MOUNT > /dev/null || error "Fail to stop client!"
        echo "stop $SINGLEMDS"
@@ -191,6 +202,83 @@ test_1b()
 }
 run_test 1b "LFSCK can find out and repair missed FID-in-LMA"
 
+test_2a() {
+       lfsck_prep 1 1
+       echo "start $SINGLEMDS"
+       start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
+               error "(1) Fail to start MDS!"
+
+       mount_client $MOUNT || error "(2) Fail to start client!"
+
+       #define OBD_FAIL_LFSCK_LINKEA_CRASH     0x1603
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1603
+       touch $DIR/$tdir/dummy
+
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0
+       umount_client $MOUNT
+       $START_NAMESPACE || error "(3) Fail to start LFSCK for namespace!"
+
+       sleep 3
+       local STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "completed" ] ||
+               error "(4) Expect 'completed', but got '$STATUS'"
+
+       local repaired=$($SHOW_NAMESPACE |
+                        awk '/^updated_phase1/ { print $2 }')
+       [ $repaired -eq 1 ] ||
+               error "(5) Fail to repair crashed linkEA: $repaired"
+
+       mount_client $MOUNT || error "(6) Fail to start client!"
+
+       stat $DIR/$tdir/dummy | grep "Links: 1" > /dev/null ||
+               error "(7) Fail to stat $DIR/$tdir/dummy"
+
+       local dummyfid=$($LFS path2fid $DIR/$tdir/dummy)
+       local dummyname=$($LFS fid2path $DIR $dummyfid)
+       [ "$dummyname" == "$DIR/$tdir/dummy" ] ||
+               error "(8) Fail to repair linkEA: $dummyfid $dummyname"
+}
+run_test 2a "LFSCK can find out and repair crashed linkEA entry"
+
+test_2b()
+{
+       lfsck_prep 1 1
+       echo "start $SINGLEMDS"
+       start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
+               error "(1) Fail to start MDS!"
+
+       mount_client $MOUNT || error "(2) Fail to start client!"
+
+       #define OBD_FAIL_LFSCK_LINKEA_MORE      0x1604
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1604
+       touch $DIR/$tdir/dummy
+
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0
+       umount_client $MOUNT
+       $START_NAMESPACE || error "(3) Fail to start LFSCK for namespace!"
+
+       sleep 3
+       local STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "completed" ] ||
+               error "(4) Expect 'completed', but got '$STATUS'"
+
+       local repaired=$($SHOW_NAMESPACE |
+                        awk '/^updated_phase2/ { print $2 }')
+       [ $repaired -eq 1 ] ||
+               error "(5) Fail to repair crashed linkEA: $repaired"
+
+       mount_client $MOUNT || error "(6) Fail to start client!"
+
+       stat $DIR/$tdir/dummy | grep "Links: 1" > /dev/null ||
+               error "(7) Fail to stat $DIR/$tdir/dummy"
+
+       local dummyfid=$($LFS path2fid $DIR/$tdir/dummy)
+       local dummyname=$($LFS fid2path $DIR $dummyfid)
+       [ "$dummyname" == "$DIR/$tdir/dummy" ] ||
+               error "(8) Fail to repair linkEA: $dummyfid $dummyname"
+}
+run_test 2b "LFSCK can find out and remove invalid linkEA entry"
+
 test_4()
 {
        lfsck_prep 3 3
@@ -242,6 +330,63 @@ test_4()
 }
 run_test 4 "FID-in-dirent can be rebuilt after MDT file-level backup/restore"
 
+test_5()
+{
+       lfsck_prep 1 1 1
+       mds_backup_restore 1 || 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_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "init" ] ||
+               error "(3) Expect 'init', but got '$STATUS'"
+
+       #define OBD_FAIL_LFSCK_DELAY2           0x1601
+       do_facet $SINGLEMDS $LCTL set_param fail_val=1
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1601
+       $START_NAMESPACE || error "(4) Fail to start LFSCK for namespace!"
+
+       sleep 5
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "scanning-phase1" ] ||
+               error "(5) Expect 'scanning-phase1', but got '$STATUS'"
+
+       local FLAGS=$($SHOW_NAMESPACE | awk '/^flags/ { print $2 }')
+       [ "$FLAGS" == "inconsistent,upgrade" ] ||
+               error "(6) Expect 'inconsistent,upgrade', but got '$FLAGS'"
+
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0
+       do_facet $SINGLEMDS $LCTL set_param fail_val=0
+       sleep 3
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "completed" ] ||
+               error "(7) Expect 'completed', but got '$STATUS'"
+
+       FLAGS=$($SHOW_NAMESPACE | awk '/^flags/ { print $2 }')
+       [ -z "$FLAGS" ] || error "(8) Expect empty flags, but got '$FLAGS'"
+
+       local repaired=$($SHOW_NAMESPACE |
+                        awk '/^updated_phase1/ { print $2 }')
+       [ $repaired -ge 2 ] ||
+               error "(9) Fail to repair crashed linkEA: $repaired"
+
+       mount_client $MOUNT || error "(10) Fail to start client!"
+
+       #define OBD_FAIL_FID_LOOKUP     0x1505
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1505
+       stat $DIR/$tdir/dummy > /dev/null || error "(11) no FID-in-LMA."
+
+       ls $DIR/$tdir/ > /dev/null || error "(12) no FID-in-dirent."
+
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0
+       local dummyfid=$($LFS path2fid $DIR/$tdir/dummy)
+       local dummyname=$($LFS fid2path $DIR $dummyfid)
+       [ "$dummyname" == "$DIR/$tdir/dummy" ] ||
+               error "(13) Fail to generate linkEA: $dummyfid $dummyname"
+}
+run_test 5 "LFSCK can handle IFIG object upgrading"
+
 test_6a() {
        lfsck_prep 10 10
        echo "start $SINGLEMDS"
@@ -335,7 +480,7 @@ test_6b() {
        local POSITION1=$($SHOW_NAMESPACE |
                          awk '/^latest_start_position/ { print $4 }')
        if [ $POSITION0 -gt $POSITION1 ]; then
-               [ $POSITION1 -eq 0 -a $POSITINO0 -eq $((POSITION1 + 1)) ] ||
+               [ $POSITION1 -eq 0 -a $POSITION0 -eq $((POSITION1 + 1)) ] ||
                error "(7) Expect larger than: $POSITION0, but got $POSITION1"
        fi
 
@@ -386,6 +531,177 @@ test_7a()
 }
 run_test 7a "non-stopped LFSCK should auto restarts after MDS remount (1)"
 
+test_7b()
+{
+       lfsck_prep 2 2
+       echo "start $SINGLEMDS"
+       start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
+               error "(1) Fail to start MDS!"
+
+       mount_client $MOUNT || error "(2) Fail to start client!"
+
+       #define OBD_FAIL_LFSCK_LINKEA_MORE      0x1604
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1604
+       for ((i=0; i<10; i++)); do
+               touch $DIR/$tdir/dummy${i}
+       done
+
+       #define OBD_FAIL_LFSCK_DELAY3           0x1602
+       do_facet $SINGLEMDS $LCTL set_param fail_val=1
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1602
+       $START_NAMESPACE || error "(3) Fail to start LFSCK for namespace!"
+
+       sleep 3
+       local STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "scanning-phase2" ] ||
+               error "(4) Expect 'scanning-phase2', but got '$STATUS'"
+
+       echo "stop $SINGLEMDS"
+       stop $SINGLEMDS > /dev/null || error "(5) Fail to stop MDS!"
+
+       echo "start $SINGLEMDS"
+       start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
+               error "(6) Fail to start MDS!"
+
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "scanning-phase2" ] ||
+               error "(7) Expect 'scanning-phase2', but got '$STATUS'"
+
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0
+       do_facet $SINGLEMDS $LCTL set_param fail_val=0
+       sleep 3
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "completed" ] ||
+               error "(8) Expect 'completed', but got '$STATUS'"
+}
+run_test 7b "non-stopped LFSCK should auto restarts after MDS remount (2)"
+
+test_8()
+{
+       lfsck_prep 20 20
+       echo "start $SINGLEMDS"
+       start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
+               error "(1) Fail to start MDS!"
+
+       local STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "init" ] ||
+               error "(2) Expect 'init', but got '$STATUS'"
+
+       mount_client $MOUNT || error "(3) Fail to start client!"
+
+       #define OBD_FAIL_LFSCK_LINKEA_CRASH     0x1603
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1603
+       mkdir $DIR/$tdir/crashed
+
+       #define OBD_FAIL_LFSCK_LINKEA_MORE      0x1604
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1604
+       for ((i=0; i<5; i++)); do
+               touch $DIR/$tdir/dummy${i}
+       done
+
+       #define OBD_FAIL_LFSCK_DELAY2           0x1601
+       do_facet $SINGLEMDS $LCTL set_param fail_val=2
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1601
+       $START_NAMESPACE || error "(4) Fail to start LFSCK for namespace!"
+
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "scanning-phase1" ] ||
+               error "(5) Expect 'scanning-phase1', but got '$STATUS'"
+
+       $STOP_LFSCK || error "(6) Fail to stop LFSCK!"
+
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "stopped" ] ||
+               error "(7) Expect 'stopped', but got '$STATUS'"
+
+       $START_NAMESPACE || error "(8) Fail to start LFSCK for namespace!"
+
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "scanning-phase1" ] ||
+               error "(9) Expect 'scanning-phase1', but got '$STATUS'"
+
+       #define OBD_FAIL_LFSCK_FATAL2           0x1609
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x80001609
+       sleep 3
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "failed" ] ||
+               error "(10) Expect 'failed', but got '$STATUS'"
+
+       #define OBD_FAIL_LFSCK_DELAY1           0x1600
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1600
+       $START_NAMESPACE || error "(11) Fail to start LFSCK for namespace!"
+
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "scanning-phase1" ] ||
+               error "(12) Expect 'scanning-phase1', but got '$STATUS'"
+
+       #define OBD_FAIL_LFSCK_CRASH            0x160a
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x160a
+       sleep 5
+
+       echo "stop $SINGLEMDS"
+       stop $SINGLEMDS > /dev/null || error "(13) Fail to stop MDS!"
+
+       #define OBD_FAIL_LFSCK_NO_AUTO          0x160b
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x160b
+
+       echo "start $SINGLEMDS"
+       start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
+               error "(14) Fail to start MDS!"
+
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "crashed" ] ||
+               error "(15) Expect 'crashed', but got '$STATUS'"
+
+       #define OBD_FAIL_LFSCK_DELAY2           0x1601
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1601
+       $START_NAMESPACE || error "(16) Fail to start LFSCK for namespace!"
+
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "scanning-phase1" ] ||
+               error "(17) Expect 'scanning-phase1', but got '$STATUS'"
+
+       echo "stop $SINGLEMDS"
+       stop $SINGLEMDS > /dev/null || error "(18) Fail to stop MDS!"
+
+       #define OBD_FAIL_LFSCK_NO_AUTO          0x160b
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x160b
+
+       echo "start $SINGLEMDS"
+       start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
+               error "(19) Fail to start MDS!"
+
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "paused" ] ||
+               error "(20) Expect 'paused', but got '$STATUS'"
+
+       #define OBD_FAIL_LFSCK_DELAY3           0x1602
+       do_facet $SINGLEMDS $LCTL set_param fail_val=2
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1602
+
+       $START_NAMESPACE || error "(21) Fail to start LFSCK for namespace!"
+       sleep 2
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "scanning-phase2" ] ||
+               error "(22) Expect 'scanning-phase2', but got '$STATUS'"
+
+       local FLAGS=$($SHOW_NAMESPACE | awk '/^flags/ { print $2 }')
+       [ "$FLAGS" == "scanned-once,inconsistent" ] ||
+               error "(23) Expect 'scanned-once,inconsistent',but got '$FLAGS'"
+
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0
+       do_facet $SINGLEMDS $LCTL set_param fail_val=0
+       sleep 2
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "completed" ] ||
+               error "(24) Expect 'completed', but got '$STATUS'"
+
+       FLAGS=$($SHOW_NAMESPACE | awk '/^flags/ { print $2 }')
+       [ -z "$FLAGS" ] || error "(25) Expect empty flags, but got '$FLAGS'"
+
+}
+run_test 8 "LFSCK state machine"
+
 test_9a() {
        if [ -z "$(grep "processor.*: 1" /proc/cpuinfo)" ]; then
                skip "Testing on UP system, the speed may be inaccurate."
@@ -401,32 +717,48 @@ test_9a() {
        [ "$STATUS" == "init" ] ||
                error "(2) Expect 'init', but got '$STATUS'"
 
-       $START_NAMESPACE -s 100 || error "(3) Fail to start LFSCK!"
+       local BASE_SPEED1=100
+       local RUN_TIME1=10
+       $START_NAMESPACE -s $BASE_SPEED1 || error "(3) Fail to start LFSCK!"
 
-       sleep 10
+       sleep $RUN_TIME1
        STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
        [ "$STATUS" == "scanning-phase1" ] ||
                error "(3) Expect 'scanning-phase1', but got '$STATUS'"
 
        local SPEED=$($SHOW_NAMESPACE |
                      awk '/^average_speed_phase1/ { print $2 }')
-       # (100 * (10 + 1)) / 10 = 110
-       [ $SPEED -lt 120 ] ||
-               error "(4) Unexpected speed $SPEED, should not more than 120"
+
+       # There may be time error, normally it should be less than 2 seconds.
+       # We allow another 20% schedule error.
+       local TIME_DIFF=2
+       # MAX_MARGIN = 1.2 = 12 / 10
+       local MAX_SPEED=$((BASE_SPEED1 * (RUN_TIME1 + TIME_DIFF) / \
+                          RUN_TIME1 * 12 / 10))
+       [ $SPEED -lt $MAX_SPEED ] ||
+               error "(4) Got speed $SPEED, expected less than $MAX_SPEED"
 
        # adjust speed limit
+       local BASE_SPEED2=300
+       local RUN_TIME2=10
        do_facet $SINGLEMDS \
-               $LCTL set_param -n mdd.${MDT_DEV}.lfsck_speed_limit 300
-       sleep 10
+               $LCTL set_param -n mdd.${MDT_DEV}.lfsck_speed_limit $BASE_SPEED2
+       sleep $RUN_TIME2
 
        SPEED=$($SHOW_NAMESPACE | awk '/^average_speed_phase1/ { print $2 }')
-       # (100 * (10 - 1) + 300 * (10 - 1)) / 20 = 180
-       [ $SPEED -lt 170 ] &&
-               error "(5) Unexpected speed $SPEED, should not less than 170"
-
-       # (100 * (10 + 1) + 300 * (10 + 1)) / 20 = 220
-       [ $SPEED -lt 230 ] ||
-               error "(6) Unexpected speed $SPEED, should not more than 230"
+       # MIN_MARGIN = 0.8 = 8 / 10
+       local MIN_SPEED=$(((BASE_SPEED1 * (RUN_TIME1 - TIME_DIFF) + \
+                           BASE_SPEED2 * (RUN_TIME2 - TIME_DIFF)) / \
+                          (RUN_TIME1 + RUN_TIME2) * 8 / 10))
+       [ $SPEED -gt $MIN_SPEED ] ||
+               error "(5) Got speed $SPEED, expected more than $MIN_SPEED"
+
+       # MAX_MARGIN = 1.2 = 12 / 10
+       MAX_SPEED=$(((BASE_SPEED1 * (RUN_TIME1 + TIME_DIFF) + \
+                     BASE_SPEED2 * (RUN_TIME2 + TIME_DIFF)) / \
+                    (RUN_TIME1 + RUN_TIME2) * 12 / 10))
+       [ $SPEED -lt $MAX_SPEED ] ||
+               error "(6) Got speed $SPEED, expected less than $MAX_SPEED"
 
        do_facet $SINGLEMDS \
                $LCTL set_param -n mdd.${MDT_DEV}.lfsck_speed_limit 0
@@ -437,6 +769,173 @@ test_9a() {
 }
 run_test 9a "LFSCK speed control (1)"
 
+test_9b() {
+       if [ -z "$(grep "processor.*: 1" /proc/cpuinfo)" ]; then
+               skip "Testing on UP system, the speed may be inaccurate."
+               return 0
+       fi
+
+       lfsck_prep 0 0
+       echo "start $SINGLEMDS"
+       start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
+               error "(1) Fail to start MDS!"
+
+       mount_client $MOUNT || error "(2) Fail to start client!"
+
+       echo "Another preparing... 50 * 50 files (with error) will be created."
+       #define OBD_FAIL_LFSCK_LINKEA_MORE      0x1604
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1604
+       for ((i=0; i<50; i++)); do
+               mkdir -p $DIR/$tdir/d${i}
+               touch $DIR/$tdir/f${i}
+               for ((j=0; j<50; j++)); do
+                       touch $DIR/$tdir/d${i}/f${j}
+               done
+       done
+
+       local STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "init" ] ||
+               error "(3) Expect 'init', but got '$STATUS'"
+
+       #define OBD_FAIL_LFSCK_NO_DOUBLESCAN    0x160c
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x160c
+       $START_NAMESPACE || error "(4) Fail to start LFSCK!"
+
+       sleep 10
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "stopped" ] ||
+               error "(5) Expect 'stopped', but got '$STATUS'"
+
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0
+
+       local BASE_SPEED1=50
+       local RUN_TIME1=10
+       $START_NAMESPACE -s $BASE_SPEED1 || error "(6) Fail to start LFSCK!"
+
+       sleep $RUN_TIME1
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "scanning-phase2" ] ||
+               error "(7) Expect 'scanning-phase2', but got '$STATUS'"
+
+       local SPEED=$($SHOW_NAMESPACE |
+                     awk '/^average_speed_phase2/ { print $2 }')
+       # There may be time error, normally it should be less than 2 seconds.
+       # We allow another 20% schedule error.
+       local TIME_DIFF=2
+       # MAX_MARGIN = 1.2 = 12 / 10
+       local MAX_SPEED=$((BASE_SPEED1 * (RUN_TIME1 + TIME_DIFF) / \
+                         RUN_TIME1 * 12 / 10))
+       [ $SPEED -lt $MAX_SPEED ] ||
+               error "(8) Got speed $SPEED, expected less than $MAX_SPEED"
+
+       # adjust speed limit
+       local BASE_SPEED2=150
+       local RUN_TIME2=10
+       do_facet $SINGLEMDS \
+               $LCTL set_param -n mdd.${MDT_DEV}.lfsck_speed_limit $BASE_SPEED2
+       sleep $RUN_TIME2
+
+       SPEED=$($SHOW_NAMESPACE | awk '/^average_speed_phase2/ { print $2 }')
+       # MIN_MARGIN = 0.8 = 8 / 10
+       local MIN_SPEED=$(((BASE_SPEED1 * (RUN_TIME1 - TIME_DIFF) + \
+                           BASE_SPEED2 * (RUN_TIME2 - TIME_DIFF)) / \
+                          (RUN_TIME1 + RUN_TIME2) * 8 / 10))
+       [ $SPEED -gt $MIN_SPEED ] ||
+               error "(9) Got speed $SPEED, expected more than $MIN_SPEED"
+
+       # MAX_MARGIN = 1.2 = 12 / 10
+       MAX_SPEED=$(((BASE_SPEED1 * (RUN_TIME1 + TIME_DIFF) + \
+                     BASE_SPEED2 * (RUN_TIME2 + TIME_DIFF)) / \
+                    (RUN_TIME1 + RUN_TIME2) * 12 / 10))
+       [ $SPEED -lt $MAX_SPEED ] ||
+               error "(10) Got speed $SPEED, expected less than $MAX_SPEED"
+
+       do_facet $SINGLEMDS \
+               $LCTL set_param -n mdd.${MDT_DEV}.lfsck_speed_limit 0
+       sleep 5
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "completed" ] ||
+               error "(11) Expect 'completed', but got '$STATUS'"
+}
+run_test 9b "LFSCK speed control (2)"
+
+test_10()
+{
+       lfsck_prep 1 1
+       echo "start $SINGLEMDS"
+       start $SINGLEMDS $MDT_DEVNAME $MOUNT_OPTS_SCRUB > /dev/null ||
+               error "(1) Fail to start MDS!"
+
+       mount_client $MOUNT || error "(2) Fail to start client!"
+
+       #define OBD_FAIL_LFSCK_LINKEA_CRASH     0x1603
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1603
+       for ((i=0; i<1000; i=$((i+2)))); do
+               mkdir -p $DIR/$tdir/d${i}
+               touch $DIR/$tdir/f${i}
+               for ((j=0; j<5; j++)); do
+                       touch $DIR/$tdir/d${i}/f${j}
+               done
+       done
+
+       #define OBD_FAIL_LFSCK_LINKEA_MORE      0x1604
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0x1604
+       for ((i=1; i<1000; i=$((i+2)))); do
+               mkdir -p $DIR/$tdir/d${i}
+               touch $DIR/$tdir/f${i}
+               for ((j=0; j<5; j++)); do
+                       touch $DIR/$tdir/d${i}/f${j}
+               done
+       done
+
+       do_facet $SINGLEMDS $LCTL set_param fail_loc=0
+       ln $DIR/$tdir/f200 $DIR/$tdir/d200/dummy
+
+       umount_client $MOUNT
+       mount_client $MOUNT || error "(3) Fail to start client!"
+
+       local STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "init" ] ||
+               error "(4) Expect 'init', but got '$STATUS'"
+
+       $START_NAMESPACE -s 100 || error "(5) Fail to start LFSCK!"
+
+       sleep 10
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "scanning-phase1" ] ||
+               error "(6) Expect 'scanning-phase1', but got '$STATUS'"
+
+       ls -ailR $MOUNT > /dev/null || error "(7) Fail to ls!"
+
+       touch $DIR/$tdir/d198/a0 || error "(8) Fail to touch!"
+
+       mkdir $DIR/$tdir/d199/a1 || error "(9) Fail to mkdir!"
+
+       unlink $DIR/$tdir/f200 || error "(10) Fail to unlink!"
+
+       rm -rf $DIR/$tdir/d201 || error "(11) Fail to rmdir!"
+
+       mv $DIR/$tdir/f202 $DIR/$tdir/d203/ || error "(12) Fail to rename!"
+
+       ln $DIR/$tdir/f204 $DIR/$tdir/d205/a3 || error "(13) Fail to hardlink!"
+
+       ln -s $DIR/$tdir/d206 $DIR/$tdir/d207/a4 ||
+               error "(14) Fail to softlink!"
+
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "scanning-phase1" ] ||
+               error "(15) Expect 'scanning-phase1', but got '$STATUS'"
+
+       do_facet $SINGLEMDS \
+               $LCTL set_param -n mdd.${MDT_DEV}.lfsck_speed_limit 0
+       umount_client $MOUNT
+       sleep 10
+       STATUS=$($SHOW_NAMESPACE | awk '/^status/ { print $2 }')
+       [ "$STATUS" == "completed" ] ||
+               error "(16) Expect 'completed', but got '$STATUS'"
+}
+run_test 10 "System is available during LFSCK scanning"
+
 $LCTL set_param debug=-lfsck > /dev/null || true
 
 # restore MDS/OST size