replay-single.sh

test_53a() {
    mkdir -p $DIR/${tdir}-1
    mkdir -p $DIR/${tdir}-2
    multiop $DIR/${tdir}-1/f O_c &
    close_pid=$!
    # give multiop a chance to open
    sleep 1

    #define OBD_FAIL_MDS_CLOSE_NET 0x115
    do_facet mds "lctl set_param fail_loc=0x80000115"
    kill -USR1 $close_pid
    cancel_lru_locks MDC # force the close
    do_facet mds "lctl set_param fail_loc=0"
    mcreate $DIR/${tdir}-2/f || return 1
    
    # close should still be here
    [ -d /proc/$close_pid ] || return 2
    replay_barrier_nodf mds
    fail mds
    wait $close_pid || return 3

    $CHECKSTAT -t file $DIR/${tdir}-1/f || return 4
    $CHECKSTAT -t file $DIR/${tdir}-2/f || return 5
    rm -rf $DIR/${tdir}-*
}
run_test 53a "|X| close request while two MDC requests in flight"

test_53b() {
    rm -rf $DIR/${tdir}-1 $DIR/${tdir}-2

    mkdir -p $DIR/$tdir-1
    mkdir -p $DIR/$tdir-2
    multiop $DIR/$tdir-1/f O_c &
    close_pid=$!

    #define OBD_FAIL_MDS_REINT_NET 0x107
    do_facet mds "lctl set_param fail_loc=0x80000107"
    mcreate $DIR/${tdir}-2/f &
    open_pid=$!
    sleep 1

    do_facet mds "lctl set_param fail_loc=0"
    kill -USR1 $close_pid
    cancel_lru_locks MDC # force the close
    wait $close_pid || return 1
    # open should still be here
    [ -d /proc/$open_pid ] || return 2

    replay_barrier_nodf mds
    fail mds
    wait $open_pid || return 3

    $CHECKSTAT -t file $DIR/${tdir}-1/f || return 4
    $CHECKSTAT -t file $DIR/${tdir}-2/f || return 5
    rm -rf $DIR/${tdir}-*
}
run_test 53b "|X| open request while two MDC requests in flight"

test_53c() {
    rm -rf $DIR/${tdir}-1 $DIR/${tdir}-2

    mkdir -p $DIR/${tdir}-1
    mkdir -p $DIR/${tdir}-2
    multiop $DIR/${tdir}-1/f O_c &
    close_pid=$!

    do_facet mds "lctl set_param fail_loc=0x80000107"
    mcreate $DIR/${tdir}-2/f &
    open_pid=$!
    sleep 1

    do_facet mds "lctl set_param fail_loc=0x80000115"
    kill -USR1 $close_pid
    cancel_lru_locks MDC  # force the close

    replay_barrier_nodf mds
    fail_nodf mds
    wait $open_pid || return 1
    sleep 2
    # close should be gone
    [ -d /proc/$close_pid ] && return 2
    do_facet mds "lctl set_param fail_loc=0"

    $CHECKSTAT -t file $DIR/${tdir}-1/f || return 3
    $CHECKSTAT -t file $DIR/${tdir}-2/f || return 4
    rm -rf $DIR/${tdir}-*
}
run_test 53c "|X| open request and close request while two MDC requests in flight"

test_53d() {
    rm -rf $DIR/${tdir}-1 $DIR/${tdir}-2

    mkdir -p $DIR/${tdir}-1
    mkdir -p $DIR/${tdir}-2
    multiop $DIR/${tdir}-1/f O_c &
    close_pid=$!
    # give multiop a chance to open
    sleep 1

    # define OBD_FAIL_MDS_CLOSE_NET_REP 0X138    
    do_facet mds "lctl set_param fail_loc=0x8000013b"
    kill -USR1 $close_pid
    cancel_lru_locks MDC  # force the close
    do_facet mds "lctl set_param fail_loc=0"
    mcreate $DIR/${tdir}-2/f || return 1
    
    # close should still be here
    [ -d /proc/$close_pid ] || return 2
    replay_barrier_nodf mds
    fail mds
    wait $close_pid || return 3

    $CHECKSTAT -t file $DIR/${tdir}-1/f || return 4
    $CHECKSTAT -t file $DIR/${tdir}-2/f || return 5
    rm -rf $DIR/${tdir}-*
}
run_test 53d "|X| close reply while two MDC requests in flight"

test_53e() {
    rm -rf $DIR/${tdir}-1 $DIR/${tdir}-2

    mkdir -p $DIR/$tdir-1
    mkdir -p $DIR/$tdir-2
    multiop $DIR/$tdir-1/f O_c &
    close_pid=$!

    #define OBD_FAIL_MDS_REINT_NET_REP       0x119
    do_facet mds "lctl set_param fail_loc=0x80000119"
    mcreate $DIR/${tdir}-2/f &
    open_pid=$!
    sleep 1
    
    do_facet mds "lctl set_param fail_loc=0"
    kill -USR1 $close_pid
    cancel_lru_locks MDC  # force the close
    wait $close_pid || return 1
    # open should still be here
    [ -d /proc/$open_pid ] || return 2
    
    replay_barrier_nodf mds
    fail mds
    wait $open_pid || return 3

    $CHECKSTAT -t file $DIR/${tdir}-1/f || return 4
    $CHECKSTAT -t file $DIR/${tdir}-2/f || return 5
    rm -rf $DIR/${tdir}-*
}
run_test 53e "|X| open reply while two MDC requests in flight"

test_53f() {
        rm -rf $DIR/${tdir}-1 $DIR/${tdir}-2

        mkdir -p $DIR/${tdir}-1
        mkdir -p $DIR/${tdir}-2
        multiop $DIR/${tdir}-1/f O_c &
        close_pid=$!

        do_facet mds "lctl set_param fail_loc=0x80000119"
        mcreate $DIR/${tdir}-2/f &
        open_pid=$!
        sleep 1

        do_facet mds "lctl set_param fail_loc=0x8000013b"
        kill -USR1 $close_pid
        cancel_lru_locks MDC

        replay_barrier_nodf mds
        fail_nodf mds
        wait $open_pid || return 1
        sleep 2
        #close should be gone
        [ -d /proc/$close_pid ] && return 2
        do_facet mds "lctl set_param fail_loc=0"

        $CHECKSTAT -t file $DIR/${tdir}-1/f || return 3
        $CHECKSTAT -t file $DIR/${tdir}-2/f || return 4
        rm -rf $DIR/${tdir}-*
}
run_test 53f "|X| open reply and close reply while two MDC requests in flight"

test_53g() {
        rm -rf $DIR/${tdir}-1 $DIR/${tdir}-2

        mkdir -p $DIR/${tdir}-1
        mkdir -p $DIR/${tdir}-2
        multiop $DIR/${tdir}-1/f O_c &
        close_pid=$!

        do_facet mds "lctl set_param fail_loc=0x80000119"
        mcreate $DIR/${tdir}-2/f &
        open_pid=$!
        sleep 1

        do_facet mds "lctl set_param fail_loc=0x80000115"
        kill -USR1 $close_pid
        cancel_lru_locks MDC # force the close

        do_facet mds "lctl set_param fail_loc=0"
        replay_barrier_nodf mds
        fail_nodf mds
        wait $open_pid || return 1
        sleep 2
        # close should be gone
        [ -d /proc/$close_pid ] && return 2

        $CHECKSTAT -t file $DIR/${tdir}-1/f || return 3
        $CHECKSTAT -t file $DIR/${tdir}-2/f || return 4
        rm -rf $DIR/${tdir}-*
}
run_test 53g "|X| drop open reply and close request while close and open are both in flight"

test_53h() {
    rm -rf $DIR/${tdir}-1 $DIR/${tdir}-2

    mkdir -p $DIR/${tdir}-1
    mkdir -p $DIR/${tdir}-2
    multiop $DIR/${tdir}-1/f O_c &
    close_pid=$!

    do_facet mds "lctl set_param fail_loc=0x80000107"
    mcreate $DIR/${tdir}-2/f &
    open_pid=$!
    sleep 1
    
    do_facet mds "lctl set_param fail_loc=0x8000013b"
    kill -USR1 $close_pid
    cancel_lru_locks MDC  # force the close
    sleep 1

    replay_barrier_nodf mds
    fail_nodf mds
    wait $open_pid || return 1
    sleep 2
    # close should be gone
    [ -d /proc/$close_pid ] && return 2
    do_facet mds "lctl set_param fail_loc=0"

    $CHECKSTAT -t file $DIR/${tdir}-1/f || return 3
    $CHECKSTAT -t file $DIR/${tdir}-2/f || return 4
    rm -rf $DIR/${tdir}-*
}
run_test 53h "|X| open request and close reply while two MDC requests in flight"

#b3761 ASSERTION(hash != 0) failed
test_55() {
# OBD_FAIL_MDS_OPEN_CREATE | OBD_FAIL_ONCE
    do_facet mds "lctl set_param fail_loc=0x8000012b"
    touch $DIR/$tfile &
    # give touch a chance to run
    sleep 5
    do_facet mds "lctl set_param fail_loc=0x0"
    rm $DIR/$tfile
    return 0
}
run_test 55 "let MDS_CHECK_RESENT return the original return code instead of 0"

#b3440 ASSERTION(rec->ur_fid2->id) failed
test_56() {
    ln -s foo $DIR/$tfile
    replay_barrier mds
    #drop_reply "cat $DIR/$tfile"
    fail mds
    sleep 10
}
run_test 56 "don't replay a symlink open request (3440)"

#recovery one mds-ost setattr from llog
test_57() {
#define OBD_FAIL_MDS_OST_SETATTR       0x12c
    do_facet mds "lctl set_param fail_loc=0x8000012c"
    touch $DIR/$tfile
    replay_barrier mds
    fail mds
    sleep 1
    $CHECKSTAT -t file $DIR/$tfile || return 1
    do_facet mds "lctl set_param fail_loc=0x0"
    rm $DIR/$tfile
}
run_test 57 "test recovery from llog for setattr op"

#recovery many mds-ost setattr from llog
test_58a() {
    mkdir -p $DIR/$tdir
#define OBD_FAIL_MDS_OST_SETATTR       0x12c
    do_facet mds "lctl set_param fail_loc=0x8000012c"
    createmany -o $DIR/$tdir/$tfile-%d 2500
    replay_barrier mds
    fail mds
    sleep 2
    $CHECKSTAT -t file $DIR/$tdir/$tfile-* >/dev/null || return 1
    do_facet mds "lctl set_param fail_loc=0x0"
    unlinkmany $DIR/$tdir/$tfile-%d 2500
    rmdir $DIR/$tdir
}
run_test 58a "test recovery from llog for setattr op (test llog_gen_rec)"

test_58b() {
    mount_client $MOUNT2
    mkdir -p $DIR/$tdir
    touch $DIR/$tdir/$tfile
    replay_barrier mds
    setfattr -n trusted.foo -v bar $DIR/$tdir/$tfile
    fail mds
    VAL=`getfattr --absolute-names --only-value -n trusted.foo $MOUNT2/$tdir/$tfile`
    [ x$VAL = x"bar" ] || return 1
    rm -f $DIR/$tdir/$tfile
    rmdir $DIR/$tdir
    zconf_umount `hostname` $MOUNT2
}
run_test 58b "test replay of setxattr op"

test_58c() { # bug 16570
        mount_client $MOUNT2
        mkdir -p $DIR/$tdir
        touch $DIR/$tdir/$tfile
        drop_request "setfattr -n trusted.foo -v bar $DIR/$tdir/$tfile" || \
                return 1
        VAL=`getfattr --absolute-names --only-value -n trusted.foo $MOUNT2/$tdir/$tfile`
        [ x$VAL = x"bar" ] || return 2
        drop_reint_reply "setfattr -n trusted.foo1 -v bar1 $DIR/$tdir/$tfile" || \
                return 3
        VAL=`getfattr --absolute-names --only-value -n trusted.foo1 $MOUNT2/$tdir/$tfile`
        [ x$VAL = x"bar1" ] || return 4
        rm -f $DIR/$tdir/$tfile
        rmdir $DIR/$tdir
        zconf_umount `hostname` $MOUNT2
}
run_test 58c "resend/reconstruct setxattr op"

# log_commit_thread vs filter_destroy race used to lead to import use after free
# bug 11658
test_59() {
    remote_ost_nodsh && skip "remote OST with nodsh" && return 0

    mkdir -p $DIR/$tdir
    createmany -o $DIR/$tdir/$tfile-%d 200
    sync
    unlinkmany $DIR/$tdir/$tfile-%d 200
#define OBD_FAIL_PTLRPC_DELAY_RECOV       0x507
    do_facet ost1 "lctl set_param fail_loc=0x507"
    fail ost1
    fail mds
    do_facet ost1 "lctl set_param fail_loc=0x0"
    sleep 20
    rmdir $DIR/$tdir
}
run_test 59 "test log_commit_thread vs filter_destroy race"

# race between add unlink llog vs cat log init in post_recovery (only for b1_6)
# bug 12086: should no oops and No ctxt error for this test
test_60() {
    mkdir -p $DIR/$tdir
    createmany -o $DIR/$tdir/$tfile-%d 200
    replay_barrier mds
    unlinkmany $DIR/$tdir/$tfile-%d 0 100
    fail mds
    unlinkmany $DIR/$tdir/$tfile-%d 100 100
    local no_ctxt=`dmesg | grep "No ctxt"`
    [ -z "$no_ctxt" ] || error "ctxt is not initialized in recovery" 
}
run_test 60 "test llog post recovery init vs llog unlink"

#test race  llog recovery thread vs llog cleanup
test_61a() {
    remote_ost_nodsh && skip "remote OST with nodsh" && return 0

    mkdir -p $DIR/$tdir
    createmany -o $DIR/$tdir/$tfile-%d 800
    replay_barrier ost1 
#   OBD_FAIL_OST_LLOG_RECOVERY_TIMEOUT 0x221 
    unlinkmany $DIR/$tdir/$tfile-%d 800 
    do_facet ost "lctl set_param fail_loc=0x80000221"
    facet_failover ost1
    sleep 10 
    fail ost1
    sleep 30
    do_facet ost "lctl set_param fail_loc=0x0"
    $CHECKSTAT -t file $DIR/$tdir/$tfile-* && return 1
    rmdir $DIR/$tdir
}
run_test 61a "test race llog recovery vs llog cleanup"

#test race  mds llog sync vs llog cleanup
test_61b() {
#   OBD_FAIL_MDS_LLOG_SYNC_TIMEOUT 0x13a 
    do_facet mds "lctl set_param fail_loc=0x8000013a"
    facet_failover mds 
    sleep 10
    fail mds
    do_facet client dd if=/dev/zero of=$DIR/$tfile bs=4k count=1 || return 1
}
run_test 61b "test race mds llog sync vs llog cleanup"

#test race  cancel cookie cb vs llog cleanup
test_61c() {
    remote_ost_nodsh && skip "remote OST with nodsh" && return 0

#   OBD_FAIL_OST_CANCEL_COOKIE_TIMEOUT 0x222 
    touch $DIR/$tfile 
    do_facet ost "lctl set_param fail_loc=0x80000222"
    rm $DIR/$tfile    
    sleep 10
    fail ost1
}
run_test 61c "test race mds llog sync vs llog cleanup"

test_61d() { # bug 16002
#define OBD_FAIL_OBD_LLOG_SETUP        0x605
    stop mds
    do_facet mds "lctl set_param fail_loc=0x80000605"
    start mds $MDSDEV $MDS_MOUNT_OPTS && error "mds start should have failed"
    do_facet mds "lctl set_param fail_loc=0"
    start mds $MDSDEV $MDS_MOUNT_OPTS || error "cannot restart mds"
}
run_test 61d "error in llog_setup should cleanup the llog context correctly"

test_62() { # Bug 15756 - don't mis-drop resent replay
    mkdir -p $DIR/$tdir
    replay_barrier mds
    createmany -o $DIR/$tdir/$tfile- 25
#define OBD_FAIL_TGT_REPLAY_DROP         0x707
    do_facet mds "lctl set_param fail_loc=0x80000707"
    facet_failover mds
    df $MOUNT || return 1
    do_facet mds "lctl set_param fail_loc=0"
    unlinkmany $DIR/$tdir/$tfile- 25 || return 2
    return 0
}
run_test 62 "don't mis-drop resent replay"

#Adaptive Timeouts (bug 3055)
AT_MAX_SET=0
# Suppose that all osts have the same at_max
for facet in mds client ost; do
    eval AT_MAX_SAVE_${facet}=$(at_max_get $facet)
done

at_start()
{
    local at_max_new=600
    if ! at_is_valid; then
        skip "AT env is invalid"
        return 1
    fi

    local at_max

    for facet in mds client ost; do
        at_max=$(at_max_get $facet)
        if [ $at_max -ne $at_max_new ]; then
            echo "AT value on $facet is $at_max, set it by force temporarily to $at_max_new"
            at_max_set $at_max_new $facet
            AT_MAX_SET=1
        fi
    done

    if [ -z "$ATOLDBASE" ]; then
	local at_history=$(do_facet mds "find /sys/ -name at_history")
	[ -z "$at_history" ] && skip "missing /sys/.../at_history " && return 1
	ATOLDBASE=$(do_facet mds "cat $at_history")
        # speed up the timebase so we can check decreasing AT
	do_facet mds "echo 8 >> $at_history"
	do_facet ost1 "echo 8 >> $at_history"

	# sleep for a while to cool down, should be > 8s and also allow
	# at least one ping to be sent. simply use TIMEOUT to be safe.
	sleep $TIMEOUT
    fi
}

test_65a() #bug 3055
{
    remote_ost_nodsh && skip "remote OST with nodsh" && return 0

    at_start || return 0
    $LCTL dk > /dev/null
    debugsave
    lctl set_param debug="+other"
    # Slow down a request to the current service time, this is critical
    # because previous tests may have caused this value to increase.
    REQ_DELAY=`lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts |
               awk '/portal 12/ {print $5}'`
    REQ_DELAY=$((${REQ_DELAY} + ${REQ_DELAY} / 4 + 5))

    do_facet mds lctl set_param fail_val=$((${REQ_DELAY} * 1000))
#define OBD_FAIL_PTLRPC_PAUSE_REQ        0x50a
    do_facet mds lctl set_param fail_loc=0x8000050a
    createmany -o $DIR/$tfile 10 > /dev/null
    unlinkmany $DIR/$tfile 10 > /dev/null
    # check for log message
    $LCTL dk | grep "Early reply #" || error "No early reply" 
    # client should show REQ_DELAY estimates
    lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts | grep portal
    sleep 9
    lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts | grep portal
}
run_test 65a "AT: verify early replies"

test_65b() #bug 3055
{
    remote_ost_nodsh && skip "remote OST with nodsh" && return 0

    at_start || return 0
    # turn on D_ADAPTTO
    debugsave
    lctl set_param debug="+other"
    $LCTL dk > /dev/null
    # Slow down a request to the current service time, this is critical
    # because previous tests may have caused this value to increase.
    REQ_DELAY=`lctl get_param -n osc.${FSNAME}-OST0000-osc-*.timeouts |
               awk '/portal 6/ {print $5}'`
    REQ_DELAY=$((${REQ_DELAY} + ${REQ_DELAY} / 4 + 5))

    do_facet ost1 lctl set_param fail_val=${REQ_DELAY}
#define OBD_FAIL_OST_BRW_PAUSE_PACK      0x224
    do_facet ost1 lctl set_param fail_loc=0x224

    rm -f $DIR/$tfile
    lfs setstripe $DIR/$tfile --index=0 --count=1
    # force some real bulk transfer
    multiop $DIR/$tfile oO_CREAT:O_RDWR:O_SYNC:w4096c

    do_facet ost1 lctl set_param fail_loc=0
    # check for log message
    $LCTL dk | grep "Early reply #" || error "No early reply"
    debugrestore
    # client should show REQ_DELAY estimates
    lctl get_param -n osc.${FSNAME}-OST0000-osc-*.timeouts | grep portal
}
run_test 65b "AT: verify early replies on packed reply / bulk"

test_66a() #bug 3055
{
    remote_ost_nodsh && skip "remote OST with nodsh" && return 0

    at_start || return 0
    lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts | grep "portal 12"
    # adjust 5s at a time so no early reply is sent (within deadline)
    do_facet mds "lctl set_param fail_val=5000"
#define OBD_FAIL_PTLRPC_PAUSE_REQ        0x50a
    do_facet mds "lctl set_param fail_loc=0x8000050a"
    createmany -o $DIR/$tfile 20 > /dev/null
    unlinkmany $DIR/$tfile 20 > /dev/null
    lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts | grep "portal 12"
    do_facet mds "lctl set_param fail_val=10000"
    do_facet mds "lctl set_param fail_loc=0x8000050a"
    createmany -o $DIR/$tfile 20 > /dev/null
    unlinkmany $DIR/$tfile 20 > /dev/null
    lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts | grep "portal 12"
    do_facet mds "lctl set_param fail_loc=0"
    sleep 9
    createmany -o $DIR/$tfile 20 > /dev/null
    unlinkmany $DIR/$tfile 20 > /dev/null
    lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts | grep portal | grep "portal 12"
    CUR=$(lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts | awk '/portal 12/ {print $5}')
    WORST=$(lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts | awk '/portal 12/ {print $7}')
    echo "Current MDT timeout $CUR, worst $WORST"
    [ $CUR -lt $WORST ] || error "Current $CUR should be less than worst $WORST" 
}
run_test 66a "AT: verify MDT service time adjusts with no early replies"

test_66b() #bug 3055
{
    remote_ost_nodsh && skip "remote OST with nodsh" && return 0

    at_start || return 0
    ORIG=$(lctl get_param -n mdc.${FSNAME}-*.timeouts | awk '/network/ {print $4}')
    lctl set_param fail_val=$(($ORIG + 5))
#define OBD_FAIL_PTLRPC_PAUSE_REP      0x50c
    lctl set_param fail_loc=0x50c
    ls $DIR/$tfile > /dev/null 2>&1
    lctl set_param fail_loc=0
    CUR=$(lctl get_param -n mdc.${FSNAME}-*.timeouts | awk '/network/ {print $4}')
    WORST=$(lctl get_param -n mdc.${FSNAME}-*.timeouts | awk '/network/ {print $6}')
    echo "network timeout orig $ORIG, cur $CUR, worst $WORST"
    [ $WORST -gt $ORIG ] || error "Worst $WORST should be worse than orig $ORIG" 
}
run_test 66b "AT: verify net latency adjusts"

test_67a() #bug 3055
{
    remote_ost_nodsh && skip "remote OST with nodsh" && return 0

    at_start || return 0
    CONN1=$(lctl get_param -n osc.*.stats | awk '/_connect/ {total+=$2} END {print total}')
    # sleeping threads may drive values above this
    do_facet ost1 "lctl set_param fail_val=400"
#define OBD_FAIL_PTLRPC_PAUSE_REQ    0x50a
    do_facet ost1 "lctl set_param fail_loc=0x50a"
    createmany -o $DIR/$tfile 20 > /dev/null
    unlinkmany $DIR/$tfile 20 > /dev/null
    do_facet ost1 "lctl set_param fail_loc=0"
    CONN2=$(lctl get_param -n osc.*.stats | awk '/_connect/ {total+=$2} END {print total}')
    ATTEMPTS=$(($CONN2 - $CONN1))
    echo "$ATTEMPTS osc reconnect attemps on gradual slow"
    [ $ATTEMPTS -gt 0 ] && error_ignore 13721 "AT should have prevented reconnect"
    return 0
}
run_test 67a "AT: verify slow request processing doesn't induce reconnects"

test_67b() #bug 3055
{
    remote_ost_nodsh && skip "remote OST with nodsh" && return 0

    at_start || return 0
    CONN1=$(lctl get_param -n osc.*.stats | awk '/_connect/ {total+=$2} END {print total}')
#define OBD_FAIL_OST_PAUSE_CREATE        0x223
    do_facet ost1 "lctl set_param fail_val=20000"
    do_facet ost1 "lctl set_param fail_loc=0x80000223"
    cp /etc/profile $DIR/$tfile || error "cp failed"
    client_reconnect
    do_facet ost1 "lctl get_param -n ost.OSS.ost_create.timeouts"
    log "phase 2"
    CONN2=$(lctl get_param -n osc.*.stats | awk '/_connect/ {total+=$2} END {print total}')
    ATTEMPTS=$(($CONN2 - $CONN1))
    echo "$ATTEMPTS osc reconnect attemps on instant slow"
    # do it again; should not timeout
    do_facet ost1 "lctl set_param fail_loc=0x80000223"
    cp /etc/profile $DIR/$tfile || error "cp failed"
    do_facet ost1 "lctl set_param fail_loc=0"
    client_reconnect
    do_facet ost1 "lctl get_param -n ost.OSS.ost_create.timeouts"
    CONN3=$(lctl get_param -n osc.*.stats | awk '/_connect/ {total+=$2} END {print total}')
    ATTEMPTS=$(($CONN3 - $CONN2))
    echo "$ATTEMPTS osc reconnect attemps on 2nd slow"
    [ $ATTEMPTS -gt 0 ] && error "AT should have prevented reconnect"
    return 0
}
run_test 67b "AT: verify instant slowdown doesn't induce reconnects"

test_68 () #bug 13813
{
    remote_ost_nodsh && skip "remote OST with nodsh" && return 0

    at_start || return 0
    local ldlm_enqueue_min=$(find /sys -name ldlm_enqueue_min)
    [ -z "$ldlm_enqueue_min" ] && skip "missing /sys/.../ldlm_enqueue_min" && return 0
    local ENQ_MIN=$(cat $ldlm_enqueue_min)
    echo $TIMEOUT >> $ldlm_enqueue_min
    rm -f $DIR/${tfile}_[1-2]
    lfs setstripe $DIR/$tfile --index=0 --count=1
#define OBD_FAIL_LDLM_PAUSE_CANCEL       0x312
    lctl set_param fail_val=$(($TIMEOUT - 1))
    lctl set_param fail_loc=0x80000312
    cp /etc/profile $DIR/${tfile}_1 || error "1st cp failed $?"
    lctl set_param fail_val=$((TIMEOUT * 3 / 2))
    lctl set_param fail_loc=0x80000312
    cp /etc/profile $DIR/${tfile}_2 || error "2nd cp failed $?"
    lctl set_param fail_loc=0
    echo $ENQ_MIN >> $ldlm_enqueue_min
    return 0
}
run_test 68 "AT: verify slowing locks"

if [ -n "$ATOLDBASE" ]; then
    at_history=$(do_facet mds "find /sys/ -name at_history")
    do_facet mds "echo $ATOLDBASE >> $at_history" || true
    do_facet ost1 "echo $ATOLDBASE >> $at_history" || true
fi

if [ $AT_MAX_SET -ne 0 ]; then
    for facet in mds client ost; do
        var=AT_MAX_SAVE_${facet}
        echo restore AT on $facet to saved value ${!var}
        at_max_set ${!var} $facet
        AT_NEW=$(at_max_get $facet)
        echo Restored AT value on $facet $AT_NEW 
        [ $AT_NEW -ne ${!var} ] && \
            error "$facet : AT value was not restored SAVED ${!var} NEW $AT_NEW"
    done
fi

# end of AT tests includes above lines

# start multi-client tests
test_70a () {
	[ -z "$CLIENTS" ] && \
		{ skip "Need two or more clients." && return; }
	[ $CLIENTCOUNT -lt 2 ] && \
		{ skip "Need two or more clients, have $CLIENTCOUNT" && return; }

	echo "mount clients $CLIENTS ..."
	zconf_mount_clients $CLIENTS $DIR

	local clients=${CLIENTS//,/ }
	echo "Write/read files on $DIR ; clients $CLIENTS ... "
	for CLIENT in $clients; do
		do_node $CLIENT dd bs=1M count=10 if=/dev/zero \
			of=$DIR/${tfile}_${CLIENT} 2>/dev/null || \
				error "dd failed on $CLIENT"
	done

	local prev_client=$(echo $clients | sed 's/^.* \(.\+\)$/\1/') 
	for C in ${CLIENTS//,/ }; do
		do_node $prev_client dd if=$DIR/${tfile}_${C} of=/dev/null 2>/dev/null || \
			error "dd if=$DIR/${tfile}_${C} failed on $prev_client"
		prev_client=$C
	done
	
	ls $DIR
}
run_test 70a "check multi client t-f"

test_70b () {
	[ -z "$CLIENTS" ] && \
		{ skip "Need two or more clients." && return; }
	[ $CLIENTCOUNT -lt 2 ] && \
		{ skip "Need two or more clients, have $CLIENTCOUNT" && return; }

	zconf_mount_clients $CLIENTS $DIR
	
	local duration=120
	[ "$SLOW" = "no" ] && duration=60
	local cmd="rundbench 1 -t $duration"
	local PID=""
	do_nodes $CLIENTS "set -x; MISSING_DBENCH_OK=$MISSING_DBENCH_OK \
		PATH=:$PATH:$LUSTRE/utils:$LUSTRE/tests/:$DBENCH_LIB \
		DBENCH_LIB=$DBENCH_LIB TESTSUITE=$TESTSUITE TESTNAME=$TESTNAME \
		LCTL=$LCTL $cmd" &
	PID=$!
	log "Started rundbench load PID=$PID ..."

	sleep $((duration / 4))
	replay_barrier mds 
	sleep 3 # give clients a time to do operations

	log "$TESTNAME fail mds 1"
	fail mds

	wait $PID || error "rundbench load on $CLIENTS failed!"

}
run_test 70b "mds recovery; $CLIENTCOUNT clients"
# end multi-client tests

equals_msg `basename $0`: test complete, cleaning up
check_and_cleanup_lustre
[ -f "$TESTSUITELOG" ] && cat $TESTSUITELOG && grep -q FAIL $TESTSUITELOG && exit 1 || true