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#!/bin/bash
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#set -v
#
# This test needs to be run on the client
#
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SAVE_PWD=$PWD
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LUSTRE=${LUSTRE:-$(cd $(dirname $0)/..; echo $PWD)}
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SETUP=${SETUP:-}
CLEANUP=${CLEANUP:-}
. $LUSTRE/tests/test-framework.sh
init_test_env $@
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. ${CONFIG:=$LUSTRE/tests/cfg/$NAME.sh}
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CHECK_GRANT=${CHECK_GRANT:-"yes"}
GRANT_CHECK_LIST=${GRANT_CHECK_LIST:-""}
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# bug number:
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ALWAYS_EXCEPT="$REPLAY_SINGLE_EXCEPT"
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#                                                  63 min  7 min  AT AT AT AT"
[ "$SLOW" = "no" ] && EXCEPT_SLOW="1 2 3 4 6 12 16 44a     44b    65 66 67 68"
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cleanup_and_setup_lustre
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rm -rf $DIR/[df][0-9]*

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test_0a() {	# was test_0
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    replay_barrier mds
    fail mds
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run_test 0a "empty replay"
test_0b() {
    # this test attempts to trigger a race in the precreation code, 
    # and must run before any other objects are created on the filesystem
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    fail ost1
    createmany -o $DIR/$tfile 20 || return 1
    unlinkmany $DIR/$tfile 20 || return 2
}
run_test 0b "ensure object created after recover exists. (3284)"

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    replay_barrier mds
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    fail mds
    $CHECKSTAT -t file $DIR/$tfile || return 1
    rm $DIR/$tfile
run_test 1 "simple create"
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    replay_barrier mds
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    fail mds
    $CHECKSTAT -t file $DIR/$tfile || return 1
    rm $DIR/$tfile
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    mcreate $DIR/$tfile
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    replay_barrier mds
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    fail mds
    $CHECKSTAT -t file $DIR/$tfile || return 1
    rm $DIR/$tfile
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    replay_barrier mds
    mcreate $DIR/$tfile
    o_directory $DIR/$tfile
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    fail mds
    $CHECKSTAT -t file $DIR/$tfile || return 2
    rm $DIR/$tfile
run_test 3a "replay failed open(O_DIRECTORY)"

test_3b() {
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    replay_barrier mds
#define OBD_FAIL_MDS_OPEN_PACK | OBD_FAIL_ONCE
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    do_facet mds "lctl set_param fail_loc=0x80000114"
    touch $DIR/$tfile
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    do_facet mds "lctl set_param fail_loc=0"
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    fail mds
    $CHECKSTAT -t file $DIR/$tfile && return 2
    return 0
}
run_test 3b "replay failed open -ENOMEM"

test_3c() {
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    replay_barrier mds
#define OBD_FAIL_MDS_ALLOC_OBDO | OBD_FAIL_ONCE
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    do_facet mds "lctl set_param fail_loc=0x80000128"
    touch $DIR/$tfile
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    do_facet mds "lctl set_param fail_loc=0"
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    fail mds

    $CHECKSTAT -t file $DIR/$tfile && return 2
    return 0
}
run_test 3c "replay failed open -ENOMEM"
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test_4a() {	# was test_4
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    replay_barrier mds
    for i in `seq 10`; do
        echo "tag-$i" > $DIR/$tfile-$i
    done 
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    fail mds
    for i in `seq 10`; do
      grep -q "tag-$i" $DIR/$tfile-$i || error "$tfile-$i"
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run_test 4a "|x| 10 open(O_CREAT)s"
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    replay_barrier mds
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    fail mds
    $CHECKSTAT -t file $DIR/$tfile-* && return 1 || true
}
run_test 4b "|x| rm 10 files"

# The idea is to get past the first block of precreated files on both 
# osts, and then replay.
test_5() {
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    replay_barrier mds
    for i in `seq 220`; do
        echo "tag-$i" > $DIR/$tfile-$i
    done 
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    fail mds
    for i in `seq 220`; do
      grep -q "tag-$i" $DIR/$tfile-$i || error "f1c-$i"
    done 
    rm -rf $DIR/$tfile-*
    sleep 3
    # waiting for commitment of removal
}
run_test 5 "|x| 220 open(O_CREAT)"


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test_6a() {	# was test_6a
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    replay_barrier mds
    mcreate $DIR/$tdir/$tfile
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    fail mds
    $CHECKSTAT -t dir $DIR/$tdir || return 1
    $CHECKSTAT -t file $DIR/$tdir/$tfile || return 2
    sleep 2
    # waiting for log process thread
}
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run_test 6a "mkdir + contained create"
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    replay_barrier mds
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    fail mds
    $CHECKSTAT -t dir $DIR/$tdir && return 1 || true 
}
run_test 6b "|X| rmdir"

test_7() {
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    replay_barrier mds
    mcreate $DIR/$tdir/$tfile
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    fail mds
    $CHECKSTAT -t dir $DIR/$tdir || return 1
    $CHECKSTAT -t file $DIR/$tdir/$tfile || return 2
    rm -fr $DIR/$tdir
}
run_test 7 "mkdir |X| contained create"

test_8() {
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    replay_barrier mds
    multiop_bg_pause $DIR/$tfile mo_c || return 4
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    fail mds
    ls $DIR/$tfile
    $CHECKSTAT -t file $DIR/$tfile || return 1
    kill -USR1 $MULTIPID || return 2
    wait $MULTIPID || return 3
    rm $DIR/$tfile
}
run_test 8 "creat open |X| close"

test_9() {
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    replay_barrier mds
    mcreate $DIR/$tfile
    local old_inum=`ls -i $DIR/$tfile | awk '{print $1}'`
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    fail mds
    local new_inum=`ls -i $DIR/$tfile | awk '{print $1}'`

    echo " old_inum == $old_inum, new_inum == $new_inum"
    if [ $old_inum -eq $new_inum  ] ;
    then
        echo " old_inum and new_inum match"
    else
        echo "!!!! old_inum and new_inum NOT match"
        return 1
    fi
    rm $DIR/$tfile
}
run_test 9  "|X| create (same inum/gen)"

test_10() {
    mcreate $DIR/$tfile
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    replay_barrier mds
    mv $DIR/$tfile $DIR/$tfile-2
    rm -f $DIR/$tfile
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    fail mds
    $CHECKSTAT $DIR/$tfile && return 1
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    $CHECKSTAT $DIR/$tfile-2 ||return 2
    rm $DIR/$tfile-2
    return 0
}
run_test 10 "create |X| rename unlink"

test_11() {
    mcreate $DIR/$tfile
    echo "old" > $DIR/$tfile
    mv $DIR/$tfile $DIR/$tfile-2
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    replay_barrier mds
    echo "new" > $DIR/$tfile
    grep new $DIR/$tfile 
    grep old $DIR/$tfile-2
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    fail mds
    grep new $DIR/$tfile || return 1
    grep old $DIR/$tfile-2 || return 2
}
run_test 11 "create open write rename |X| create-old-name read"

test_12() {
    mcreate $DIR/$tfile 
    multiop_bg_pause $DIR/$tfile o_tSc || return 3
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    replay_barrier mds
    kill -USR1 $pid
    wait $pid || return 1

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    fail mds
    [ -e $DIR/$tfile ] && return 2
    return 0
}
run_test 12 "open, unlink |X| close"


# 1777 - replay open after committed chmod that would make
#        a regular open a failure    
test_13() {
    mcreate $DIR/$tfile 
    multiop_bg_pause $DIR/$tfile O_wc || return 3
    pid=$!
    chmod 0 $DIR/$tfile
    $CHECKSTAT -p 0 $DIR/$tfile
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    replay_barrier mds
    fail mds
    kill -USR1 $pid
    wait $pid || return 1

    $CHECKSTAT -s 1 -p 0 $DIR/$tfile || return 2
    return 0
}
run_test 13 "open chmod 0 |x| write close"

test_14() {
    multiop_bg_pause $DIR/$tfile O_tSc || return 4
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    replay_barrier mds
    kill -USR1 $pid || return 1
    wait $pid || return 2

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    fail mds
    [ -e $DIR/$tfile ] && return 3
    return 0
}
run_test 14 "open(O_CREAT), unlink |X| close"

test_15() {
    multiop_bg_pause $DIR/$tfile O_tSc || return 5
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    replay_barrier mds
    touch $DIR/g11 || return 1
    kill -USR1 $pid
    wait $pid || return 2

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    fail mds
    [ -e $DIR/$tfile ] && return 3
    touch $DIR/h11 || return 4
    return 0
}
run_test 15 "open(O_CREAT), unlink |X|  touch new, close"


test_16() {
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    replay_barrier mds
    mcreate $DIR/$tfile
    munlink $DIR/$tfile
    mcreate $DIR/$tfile-2
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    fail mds
    [ -e $DIR/$tfile ] && return 1
    [ -e $DIR/$tfile-2 ] || return 2
    munlink $DIR/$tfile-2 || return 3
}
run_test 16 "|X| open(O_CREAT), unlink, touch new,  unlink new"

test_17() {
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    replay_barrier mds
    multiop_bg_pause $DIR/$tfile O_c || return 4
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    fail mds
    kill -USR1 $pid || return 1
    wait $pid || return 2
    $CHECKSTAT -t file $DIR/$tfile || return 3
    rm $DIR/$tfile
}
run_test 17 "|X| open(O_CREAT), |replay| close"

test_18() {
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    replay_barrier mds
    multiop_bg_pause $DIR/$tfile O_tSc || return 8
    pid=$!
    rm -f $DIR/$tfile
    touch $DIR/$tfile-2 || return 1
    echo "pid: $pid will close"
    kill -USR1 $pid
    wait $pid || return 2
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    fail mds
    [ -e $DIR/$tfile ] && return 3
    [ -e $DIR/$tfile-2 ] || return 4
    # this touch frequently fails
    touch $DIR/$tfile-3 || return 5
    munlink $DIR/$tfile-2 || return 6
    munlink $DIR/$tfile-3 || return 7
    return 0
}
run_test 18 "|X| open(O_CREAT), unlink, touch new, close, touch, unlink"

# bug 1855 (a simpler form of test_11 above)
test_19() {
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    replay_barrier mds
    mcreate $DIR/$tfile
    echo "old" > $DIR/$tfile
    mv $DIR/$tfile $DIR/$tfile-2
    grep old $DIR/$tfile-2
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    fail mds
    grep old $DIR/$tfile-2 || return 2
}
run_test 19 "|X| mcreate, open, write, rename "

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test_20a() {	# was test_20
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    replay_barrier mds
    multiop_bg_pause $DIR/$tfile O_tSc || return 3
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    fail mds
    kill -USR1 $pid
    wait $pid || return 1
    [ -e $DIR/$tfile ] && return 2
    return 0
}
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run_test 20a "|X| open(O_CREAT), unlink, replay, close (test mds_cleanup_orphans)"
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test_20b() { # bug 10480
    BEFOREUSED=`df -P $DIR | tail -1 | awk '{ print $3 }'`

    dd if=/dev/zero of=$DIR/$tfile bs=4k count=10000 &
    pid=$!
    while [ ! -e $DIR/$tfile ] ; do
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        sleep 0.060s                           # give dd a chance to start
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    done

    lfs getstripe $DIR/$tfile || return 1
    rm -f $DIR/$tfile || return 2       # make it an orphan
    mds_evict_client
    df -P $DIR || df -P $DIR || true    # reconnect

    fail mds                            # start orphan recovery
    df -P $DIR || df -P $DIR || true    # reconnect
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    wait_mds_recovery_done || error "MDS recovery not done"
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    AFTERUSED=`df -P $DIR | tail -1 | awk '{ print $3 }'`
    log "before $BEFOREUSED, after $AFTERUSED"
    [ $AFTERUSED -gt $((BEFOREUSED + 20)) ] && \
        error "after $AFTERUSED > before $BEFOREUSED" && return 5
    return 0
}
run_test 20b "write, unlink, eviction, replay, (test mds_cleanup_orphans)"

test_20c() { # bug 10480
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    multiop $DIR/$tfile Ow_c &
    pid=$!
    # give multiop a chance to open
    sleep 1
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    ls -la $DIR/$tfile

    mds_evict_client

    df -P $DIR || df -P $DIR || true    # reconnect

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    kill -USR1 $pid
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    test -s $DIR/$tfile || error "File was truncated"

    return 0
}
run_test 20c "check that client eviction does not affect file content"

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    replay_barrier mds
    multiop_bg_pause $DIR/$tfile O_tSc || return 5
    pid=$!
    rm -f $DIR/$tfile
    touch $DIR/g11 || return 1

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    fail mds
    kill -USR1 $pid
    wait $pid || return 2
    [ -e $DIR/$tfile ] && return 3
    touch $DIR/h11 || return 4
    return 0
}
run_test 21 "|X| open(O_CREAT), unlink touch new, replay, close (test mds_cleanup_orphans)"

test_22() {
    multiop_bg_pause $DIR/$tfile O_tSc || return 3
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    replay_barrier mds
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    fail mds
    kill -USR1 $pid
    wait $pid || return 1
    [ -e $DIR/$tfile ] && return 2
    return 0
}
run_test 22 "open(O_CREAT), |X| unlink, replay, close (test mds_cleanup_orphans)"

test_23() {
    multiop_bg_pause $DIR/$tfile O_tSc || return 5
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    replay_barrier mds
    rm -f $DIR/$tfile
    touch $DIR/g11 || return 1

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    fail mds
    kill -USR1 $pid
    wait $pid || return 2
    [ -e $DIR/$tfile ] && return 3
    touch $DIR/h11 || return 4
    return 0
}
run_test 23 "open(O_CREAT), |X| unlink touch new, replay, close (test mds_cleanup_orphans)"

test_24() {
    multiop_bg_pause $DIR/$tfile O_tSc || return 3
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    replay_barrier mds
    fail mds
    rm -f $DIR/$tfile
    kill -USR1 $pid
    wait $pid || return 1
    [ -e $DIR/$tfile ] && return 2
    return 0
}
run_test 24 "open(O_CREAT), replay, unlink, close (test mds_cleanup_orphans)"

test_25() {
    multiop_bg_pause $DIR/$tfile O_tSc || return 3
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    replay_barrier mds
    fail mds
    kill -USR1 $pid
    wait $pid || return 1
    [ -e $DIR/$tfile ] && return 2
    return 0
}
run_test 25 "open(O_CREAT), unlink, replay, close (test mds_cleanup_orphans)"

test_26() {
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    replay_barrier mds
    multiop_bg_pause $DIR/$tfile-1 O_tSc || return 5
    multiop_bg_pause $DIR/$tfile-2 O_tSc || return 6
    pid2=$!
    rm -f $DIR/$tfile-1
    rm -f $DIR/$tfile-2
    kill -USR1 $pid2
    wait $pid2 || return 1

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    fail mds
    kill -USR1 $pid1
    wait $pid1 || return 2
    [ -e $DIR/$tfile-1 ] && return 3
    [ -e $DIR/$tfile-2 ] && return 4
    return 0
}
run_test 26 "|X| open(O_CREAT), unlink two, close one, replay, close one (test mds_cleanup_orphans)"

test_27() {
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    replay_barrier mds
    multiop_bg_pause $DIR/$tfile-1 O_tSc || return 5
    multiop_bg_pause $DIR/$tfile-2 O_tSc || return 6
    pid2=$!
    rm -f $DIR/$tfile-1
    rm -f $DIR/$tfile-2

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    fail mds
    kill -USR1 $pid1
    wait $pid1 || return 1
    kill -USR1 $pid2
    wait $pid2 || return 2
    [ -e $DIR/$tfile-1 ] && return 3
    [ -e $DIR/$tfile-2 ] && return 4
    return 0
}
run_test 27 "|X| open(O_CREAT), unlink two, replay, close two (test mds_cleanup_orphans)"

test_28() {
    multiop_bg_pause $DIR/$tfile-1 O_tSc || return 5
    multiop_bg_pause $DIR/$tfile-2 O_tSc || return 6
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    replay_barrier mds
    rm -f $DIR/$tfile-1
    rm -f $DIR/$tfile-2
    kill -USR1 $pid2
    wait $pid2 || return 1

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    fail mds
    kill -USR1 $pid1
    wait $pid1 || return 2
    [ -e $DIR/$tfile-1 ] && return 3
    [ -e $DIR/$tfile-2 ] && return 4
    return 0
}
run_test 28 "open(O_CREAT), |X| unlink two, close one, replay, close one (test mds_cleanup_orphans)"

test_29() {
    multiop_bg_pause $DIR/$tfile-1 O_tSc || return 5
    multiop_bg_pause $DIR/$tfile-2 O_tSc || return 6
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    replay_barrier mds
    rm -f $DIR/$tfile-1
    rm -f $DIR/$tfile-2

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    fail mds
    kill -USR1 $pid1
    wait $pid1 || return 1
    kill -USR1 $pid2
    wait $pid2 || return 2
    [ -e $DIR/$tfile-1 ] && return 3
    [ -e $DIR/$tfile-2 ] && return 4
    return 0
}
run_test 29 "open(O_CREAT), |X| unlink two, replay, close two (test mds_cleanup_orphans)"

test_30() {
    multiop_bg_pause $DIR/$tfile-1 O_tSc || return 5
    multiop_bg_pause $DIR/$tfile-2 O_tSc || return 6
    pid2=$!
    rm -f $DIR/$tfile-1
    rm -f $DIR/$tfile-2

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    replay_barrier mds
    fail mds
    kill -USR1 $pid1
    wait $pid1 || return 1
    kill -USR1 $pid2
    wait $pid2 || return 2
    [ -e $DIR/$tfile-1 ] && return 3
    [ -e $DIR/$tfile-2 ] && return 4
    return 0
}
run_test 30 "open(O_CREAT) two, unlink two, replay, close two (test mds_cleanup_orphans)"

test_31() {
    multiop_bg_pause $DIR/$tfile-1 O_tSc || return 5
    multiop_bg_pause $DIR/$tfile-2 O_tSc || return 6
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    replay_barrier mds
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    fail mds
    kill -USR1 $pid1
    wait $pid1 || return 1
    kill -USR1 $pid2
    wait $pid2 || return 2
    [ -e $DIR/$tfile-1 ] && return 3
    [ -e $DIR/$tfile-2 ] && return 4
    return 0
}
run_test 31 "open(O_CREAT) two, unlink one, |X| unlink one, close two (test mds_cleanup_orphans)"

# tests for bug 2104; completion without crashing is success.  The close is
# stale, but we always return 0 for close, so the app never sees it.
test_32() {
    multiop_bg_pause $DIR/$tfile O_c || return 2
    multiop_bg_pause $DIR/$tfile O_c || return 3
    df $MOUNT || sleep 1 && df $MOUNT || return 1
    kill -USR1 $pid1
    kill -USR1 $pid2
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    sleep 1
    return 0
}
run_test 32 "close() notices client eviction; close() after client eviction"

# Abort recovery before client complete
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test_33a() {	# was test_33
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    replay_barrier mds
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    createmany -o $DIR/$tfile-%d 100 
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    fail_abort mds
    # this file should be gone, because the replay was aborted
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    $CHECKSTAT -t file $DIR/$tfile-* && return 3 
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    unlinkmany $DIR/$tfile-%d 0 100
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run_test 33a "abort recovery before client does replay"
    multiop_bg_pause $DIR/$tfile O_c || return 2
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    replay_barrier mds
    fail_abort mds
    kill -USR1 $pid
    [ -e $DIR/$tfile ] && return 1
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    sync
    return 0
}
run_test 34 "abort recovery before client does replay (test mds_cleanup_orphans)"

# bug 2278 - generate one orphan on OST, then destroy it during recovery from llog 
test_35() {
    touch $DIR/$tfile

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#define OBD_FAIL_MDS_REINT_NET_REP       0x119
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    do_facet mds "lctl set_param fail_loc=0x80000119"
    rm -f $DIR/$tfile &
    sleep 1
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    sync
    sleep 1
    # give a chance to remove from MDS
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    fail_abort mds
    $CHECKSTAT -t file $DIR/$tfile && return 1 || true
}
run_test 35 "test recovery from llog for unlink op"
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# b=2432 resent cancel after replay uses wrong cookie,
# so don't resend cancels
test_36() {
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    replay_barrier mds
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    touch $DIR/$tfile
    checkstat $DIR/$tfile
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    facet_failover mds
    cancel_lru_locks mdc
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    if dmesg | grep "unknown lock cookie"; then 
	echo "cancel after replay failed"
	return 1
    fi
}
run_test 36 "don't resend cancel"

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# b=2368
# directory orphans can't be unlinked from PENDING directory
test_37() {
    rmdir $DIR/$tfile 2>/dev/null
    multiop_bg_pause $DIR/$tfile dD_c || return 2
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    pid=$!
    rmdir $DIR/$tfile

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    replay_barrier mds
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    # clear the dmesg buffer so we only see errors from this recovery
    dmesg -c >/dev/null
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    fail_abort mds
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    kill -USR1 $pid
    dmesg | grep  "mds_unlink_orphan.*error .* unlinking orphan" && return 1
    sync
    return 0
}
run_test 37 "abort recovery before client does replay (test mds_cleanup_orphans for directories)"

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    createmany -o $DIR/$tfile-%d 800
    unlinkmany $DIR/$tfile-%d 0 400
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    replay_barrier mds
    fail mds
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    unlinkmany $DIR/$tfile-%d 400 400
    sleep 2
    $CHECKSTAT -t file $DIR/$tfile-* && return 1 || true
}
run_test 38 "test recovery from unlink llog (test llog_gen_rec) "

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test_39() { # bug 4176
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    createmany -o $DIR/$tfile-%d 800
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    replay_barrier mds
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    unlinkmany $DIR/$tfile-%d 0 400
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    fail mds
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    unlinkmany $DIR/$tfile-%d 400 400
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    ls -1f $DIR/$tfile-*
    $CHECKSTAT -t file $DIR/$tfile-* && return 1 || true
}
run_test 39 "test recovery from unlink llog (test llog_gen_rec) "

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count_ost_writes() {
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    lctl get_param -n osc.*.stats | awk -vwrites=0 '/ost_write/ { writes += $2 } END { print writes; }'
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}

#b=2477,2532
test_40(){
    $LCTL mark multiop $MOUNT/$tfile OS_c 
    multiop $MOUNT/$tfile OS_c  &
    PID=$!
    writeme -s $MOUNT/${tfile}-2 &
    WRITE_PID=$!
    sleep 1
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    facet_failover mds
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#define OBD_FAIL_MDS_CONNECT_NET         0x117
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    do_facet mds "lctl set_param fail_loc=0x80000117"
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    kill -USR1 $PID
    stat1=`count_ost_writes`
    sleep $TIMEOUT
    stat2=`count_ost_writes`
    echo "$stat1, $stat2"
    if [ $stat1 -lt $stat2 ]; then 
       echo "writes continuing during recovery"
       RC=0
    else
       echo "writes not continuing during recovery, bug 2477"
       RC=4
    fi
    echo "waiting for writeme $WRITE_PID"
    kill $WRITE_PID
    wait $WRITE_PID 

    echo "waiting for multiop $PID"
    wait $PID || return 2
    do_facet client munlink $MOUNT/$tfile  || return 3
    do_facet client munlink $MOUNT/${tfile}-2  || return 3
    return $RC
}
run_test 40 "cause recovery in ptlrpc, ensure IO continues"


#b=2814
# make sure that a read to one osc doesn't try to double-unlock its page just
# because another osc is invalid.  trigger_group_io used to mistakenly return
# an error if any oscs were invalid even after having successfully put rpcs
# on valid oscs.  This was fatal if the caller was ll_readpage who unlocked
# the page, guarnateeing that the unlock from the RPC completion would
# assert on trying to unlock the unlocked page.
test_41() {
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    [ $OSTCOUNT -lt 2 ] && \
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	skip "skipping test 41: we don't have a second OST to test with" && \
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	return

    local f=$MOUNT/$tfile
    # make sure the start of the file is ost1
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    lfs setstripe $f -s $((128 * 1024)) -i 0 
    do_facet client dd if=/dev/zero of=$f bs=4k count=1 || return 3
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    cancel_lru_locks osc
    # fail ost2 and read from ost1
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    local osc2dev=`lctl get_param -n devices | grep ${ost2_svc}-osc- | awk '{print $1}'`
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    [ "$osc2dev" ] || return 4
    $LCTL --device $osc2dev deactivate || return 1
    do_facet client dd if=$f of=/dev/null bs=4k count=1 || return 3
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    $LCTL --device $osc2dev activate || return 2
    return 0
}
run_test 41 "read from a valid osc while other oscs are invalid"

# test MDS recovery after ost failure
test_42() {
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    blocks=`df -P $MOUNT | tail -n 1 | awk '{ print $2 }'`
    createmany -o $DIR/$tfile-%d 800
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    replay_barrier ost1
    unlinkmany $DIR/$tfile-%d 0 400
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    debugsave
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    lctl set_param debug=-1
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    facet_failover ost1
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    # osc is evicted, fs is smaller (but only with failout OSTs (bug 7287)
    #blocks_after=`df -P $MOUNT | tail -n 1 | awk '{ print $2 }'`
    #[ $blocks_after -lt $blocks ] || return 1
    echo wait for MDS to timeout and recover
    sleep $((TIMEOUT * 2))
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    debugrestore
    unlinkmany $DIR/$tfile-%d 400 400
    $CHECKSTAT -t file $DIR/$tfile-* && return 2 || true
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run_test 42 "recovery after ost failure"
# timeout in MDS/OST recovery RPC will LBUG MDS
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test_43() { # bug 2530
    replay_barrier mds
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    do_facet ost1 "lctl set_param fail_loc=0x80000204"
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    fail mds
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    do_facet ost1 "lctl set_param fail_loc=0"

    return 0
}
run_test 43 "mds osc import failure during recovery; don't LBUG"

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test_44a() {	# was test_44
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    local at_max_saved=0

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    mdcdev=`lctl get_param -n devices | awk '/-mdc-/ {print $1}'`
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    [ "$mdcdev" ] || exit 2
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    # adaptive timeouts slow this way down
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    if at_is_valid && at_is_enabled; then
        at_max_saved=$(at_max_get mds)
        at_max_set 40 mds
    fi

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    for i in `seq 1 10`; do
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	echo "$i of 10 ($(date +%s))"
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	do_facet mds "lctl get_param -n mdt.MDS.mds.timeouts | grep service"
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	#define OBD_FAIL_TGT_CONN_RACE     0x701
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	do_facet mds "lctl set_param fail_loc=0x80000701"
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	$LCTL --device $mdcdev recover
	df $MOUNT
    done
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    do_facet mds "lctl set_param fail_loc=0"
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    [ $at_max_saved -ne 0 ] && at_max_set $at_max_saved mds
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    return 0
}
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run_test 44a "race in target handle connect"
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test_44b() {
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    mdcdev=`lctl get_param -n devices | awk '/-mdc-/ {print $1}'`
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    [ "$mdcdev" ] || exit 2
    for i in `seq 1 10`; do
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	echo "$i of 10 ($(date +%s))"
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	do_facet mds "lctl get_param -n mdt.MDS.mds.timeouts | grep service"
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	#define OBD_FAIL_TGT_DELAY_RECONNECT 0x704
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	do_facet mds "lctl set_param fail_loc=0x80000704"
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	$LCTL --device $mdcdev recover
	df $MOUNT
    done
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    do_facet mds "lctl set_param fail_loc=0"
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    return 0
}
run_test 44b "race in target handle connect"

# Handle failed close
test_45() {
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    mdcdev=`lctl get_param -n devices | awk '/-mdc-/ {print $1}'`
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    [ "$mdcdev" ] || exit 2
    $LCTL --device $mdcdev recover

    multiop_bg_pause $DIR/$tfile O_c || return 1
    pid=$!

    # This will cause the CLOSE to fail before even 
    # allocating a reply buffer
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    $LCTL --device $mdcdev deactivate || return 4

    # try the close
    kill -USR1 $pid
    wait $pid || return 1

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    $LCTL --device $mdcdev activate || return 5
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    sleep 1

    $CHECKSTAT -t file $DIR/$tfile || return 2
    return 0
}
run_test 45 "Handle failed close"

test_46() {
    dmesg -c >/dev/null
    drop_reply "touch $DIR/$tfile"
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    fail mds
    # ironically, the previous test, 45, will cause a real forced close,
    # so just look for one for this test
    dmesg | grep -i "force closing client file handle for $tfile" && return 1
    return 0
}
run_test 46 "Don't leak file handle after open resend (3325)"

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test_47() { # bug 2824
    # create some files to make sure precreate has been done on all 
    # OSTs. (just in case this test is run independently)
    createmany -o $DIR/$tfile 20  || return 1

    # OBD_FAIL_OST_CREATE_NET 0x204
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    fail ost1
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    do_facet ost1 "lctl set_param fail_loc=0x80000204"
    df $MOUNT || return 2

    # let the MDS discover the OST failure, attempt to recover, fail
    # and recover again.  
    sleep $((3 * TIMEOUT))

    # Without 2824, this createmany would hang 
    createmany -o $DIR/$tfile 20 || return 3
    unlinkmany $DIR/$tfile 20 || return 4

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    do_facet ost1 "lctl set_param fail_loc=0"
    return 0
}
run_test 47 "MDS->OSC failure during precreate cleanup (2824)"

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test_48() {
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    replay_barrier mds
    createmany -o $DIR/$tfile 20  || return 1
    # OBD_FAIL_OST_EROFS 0x216
    fail mds
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    do_facet ost1 "lctl set_param fail_loc=0x80000216"
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    df $MOUNT || return 2
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    createmany -o $DIR/$tfile 20 20 || return 2
    unlinkmany $DIR/$tfile 40 || return 3
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    do_facet ost1 "lctl set_param fail_loc=0"
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    return 0
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}
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run_test 48 "MDS->OSC failure during precreate cleanup (2824)"
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    local oscdev=`do_facet mds lctl get_param -n devices | grep ${ost1_svc}-osc | awk '{print $1}' | head -1`
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    [ "$oscdev" ] || return 1
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    do_facet mds $LCTL --device $oscdev recover || return 2 
    do_facet mds $LCTL --device $oscdev recover || return 3 
    # give the mds_lov_sync threads a chance to run
    sleep 5
}
run_test 50 "Double OSC recovery, don't LASSERT (3812)"

# b3764 timed out lock replay
test_52() {
    touch $DIR/$tfile
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    cancel_lru_locks mdc
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    multiop $DIR/$tfile s || return 1
    replay_barrier mds
#define OBD_FAIL_LDLM_REPLY              0x30c
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    do_facet mds "lctl set_param fail_loc=0x8000030c"
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    fail mds || return 2
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    do_facet mds "lctl set_param fail_loc=0x0"

    $CHECKSTAT -t file $DIR/$tfile-* && return 3 || true
}
run_test 52 "time out lock replay (3764)"

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# bug 3462 - simultaneous MDC requests
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
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    do_facet mds "lctl set_param fail_loc=0x80000115"
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    kill -USR1 $close_pid
    cancel_lru_locks MDC # force the close
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    do_facet mds "lctl set_param fail_loc=0"
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    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() {
    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
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    do_facet mds "lctl set_param fail_loc=0x80000107"
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    mcreate $DIR/${tdir}-2/f &
    open_pid=$!
    sleep 1

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    do_facet mds "lctl set_param fail_loc=0"
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    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() {
    mkdir -p $DIR/${tdir}-1
    mkdir -p $DIR/${tdir}-2
    multiop $DIR/${tdir}-1/f O_c &
    close_pid=$!

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

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    do_facet mds "lctl set_param fail_loc=0x80000115"
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    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
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    do_facet mds "lctl set_param fail_loc=0"
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    $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() {
    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    
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    do_facet mds "lctl set_param fail_loc=0x8000013b"
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    kill -USR1 $close_pid
    cancel_lru_locks MDC  # force the close
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    do_facet mds "lctl set_param fail_loc=0"
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    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() {
    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
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    do_facet mds "lctl set_param fail_loc=0x80000119"
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    mcreate $DIR/${tdir}-2/f &
    open_pid=$!
    sleep 1
    
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    do_facet mds "lctl set_param fail_loc=0"
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    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"

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test_53f() {
        mkdir -p $DIR/${tdir}-1
        mkdir -p $DIR/${tdir}-2
        multiop $DIR/${tdir}-1/f O_c &
        close_pid=$!

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

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        do_facet mds "lctl set_param fail_loc=0x8000013b"
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        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
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        do_facet mds "lctl set_param fail_loc=0"
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        $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() {
        mkdir -p $DIR/${tdir}-1
        mkdir -p $DIR/${tdir}-2
        multiop $DIR/${tdir}-1/f O_c &
        close_pid=$!

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

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

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        do_facet mds "lctl set_param fail_loc=0"
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        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"

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test_53h() {
    mkdir -p $DIR/${tdir}-1
    mkdir -p $DIR/${tdir}-2
    multiop $DIR/${tdir}-1/f O_c &
    close_pid=$!

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    do_facet mds "lctl set_param fail_loc=0x80000107"
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    mcreate $DIR/${tdir}-2/f &
    open_pid=$!
    sleep 1
    
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    do_facet mds "lctl set_param fail_loc=0x8000013b"
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    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
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    do_facet mds "lctl set_param fail_loc=0"
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    $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"
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#b3761 ASSERTION(hash != 0) failed
test_55() {
# OBD_FAIL_MDS_OPEN_CREATE | OBD_FAIL_ONCE
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    do_facet mds "lctl set_param fail_loc=0x8000012b"
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    touch $DIR/$tfile &
    # give touch a chance to run
    sleep 5
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    do_facet mds "lctl set_param fail_loc=0x0"
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    rm $DIR/$tfile
    return 0
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run_test 55 "let MDS_CHECK_RESENT return the original return code instead of 0"
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#b3440 ASSERTION(rec->ur_fid2->id) failed
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test_56() {
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    ln -s foo $DIR/$tfile
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    replay_barrier mds
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    #drop_reply "cat $DIR/$tfile"
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    fail mds
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    sleep 10
}
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run_test 56 "don't replay a symlink open request (3440)"
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#recovery one mds-ost setattr from llog
test_57() {
#define OBD_FAIL_MDS_OST_SETATTR       0x12c
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    do_facet mds "lctl set_param fail_loc=0x8000012c"
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    touch $DIR/$tfile
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    replay_barrier mds
    fail mds
    sleep 1
    $CHECKSTAT -t file $DIR/$tfile || return 1
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    do_facet mds "lctl set_param fail_loc=0x0"
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    rm $DIR/$tfile
}
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run_test 57 "test recovery from llog for setattr op"
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#recovery many mds-ost setattr from llog
test_58() {
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#define OBD_FAIL_MDS_OST_SETATTR       0x12c
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    do_facet mds "lctl set_param fail_loc=0x8000012c"
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    createmany -o $DIR/$tdir/$tfile-%d 2500
    replay_barrier mds
    fail mds
    sleep 2
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    $CHECKSTAT -t file $DIR/$tdir/$tfile-* >/dev/null || return 1
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    do_facet mds "lctl set_param fail_loc=0x0"
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    unlinkmany $DIR/$tdir/$tfile-%d 2500
    rmdir $DIR/$tdir
}
run_test 58 "test recovery from llog for setattr op (test llog_gen_rec)"
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# log_commit_thread vs filter_destroy race used to lead to import use after free
# bug 11658
test_59() {
    createmany -o $DIR/$tdir/$tfile-%d 200
    sync
    unlinkmany $DIR/$tdir/$tfile-%d 200
#define OBD_FAIL_PTLRPC_DELAY_RECOV       0x507
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    do_facet ost1 "lctl set_param fail_loc=0x507"
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    fail ost1
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    fail mds
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    do_facet ost1 "lctl set_param fail_loc=0x0"
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    sleep 20
    rmdir $DIR/$tdir
}
run_test 59 "test log_commit_thread vs filter_destroy race"

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# 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() {
    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"
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#test race  llog recovery thread vs llog cleanup
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test_61a() {
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    createmany -o $DIR/$tdir/$tfile-%d 800
    replay_barrier ost1 
#   OBD_FAIL_OST_LLOG_RECOVERY_TIMEOUT 0x221 
    unlinkmany $DIR/$tdir/$tfile-%d 800 
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    do_facet ost "lctl set_param fail_loc=0x80000221"
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    facet_failover ost1
    sleep 10 
    fail ost1
    sleep 30
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    do_facet ost "lctl set_param fail_loc=0x0"
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    $CHECKSTAT -t file $DIR/$tdir/$tfile-* && return 1
    rmdir $DIR/$tdir
}
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run_test 61a "test race llog recovery vs llog cleanup"
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#test race  mds llog sync vs llog cleanup
test_61b() {
#   OBD_FAIL_MDS_LLOG_SYNC_TIMEOUT 0x13a 
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    do_facet mds "lctl set_param fail_loc=0x8000013a"
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    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() {
#   OBD_FAIL_OST_CANCEL_COOKIE_TIMEOUT 0x222 
    touch $DIR/$tfile 
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    do_facet ost "lctl set_param fail_loc=0x80000222"
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    rm $DIR/$tfile    
    sleep 10
    fail ost1
}
run_test 61c "test race mds llog sync vs llog cleanup"

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

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#Adaptive Timeouts (bug 3055)
AT_MAX_SET=0

at_start()
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{
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    if ! at_is_valid; then
        skip "AT env is invalid"
        return 1
    fi
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    if ! at_is_enabled; then
        echo "AT is disabled, enable it by force temporarily"
        at_max_set 600 mds ost client
        AT_MAX_SET=1
    fi

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    if [ -z "$ATOLDBASE" ]; then
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	local at_history=$(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")
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        # speed up the timebase so we can check decreasing AT
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	do_facet mds "echo 8 >> $at_history"
	do_facet ost1 "echo 8 >> $at_history"
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    fi
}

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test_65a() #bug 3055
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{
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    at_start || return 0
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    $LCTL dk > /dev/null
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    debugsave
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    lctl set_param debug="+other"
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    # slow down a request
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    do_facet mds lctl set_param fail_val=30000
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#define OBD_FAIL_PTLRPC_PAUSE_REQ        0x50a
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    do_facet mds lctl set_param fail_loc=0x8000050a
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    createmany -o $DIR/$tfile 10 > /dev/null
    unlinkmany $DIR/$tfile 10 > /dev/null
    # check for log message
    $LCTL dk | grep "Early reply #" || error "No early reply" 
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    # client should show 30s estimates
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    lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts | grep portal
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    sleep 9
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    lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts | grep portal
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}
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run_test 65a "AT: verify early replies"

test_65b() #bug 3055
{
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    at_start || return 0
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    # turn on D_ADAPTTO
    debugsave
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    lctl set_param debug="+other"
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    $LCTL dk > /dev/null
    # slow down bulk i/o
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    do_facet ost1 lctl set_param fail_val=30
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#define OBD_FAIL_OST_BRW_PAUSE_PACK      0x224
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    do_facet ost1 lctl set_param fail_loc=0x224
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    rm -f $DIR/$tfile
    lfs setstripe $DIR/$tfile --index=0 --count=1
    # force some real bulk transfer
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    multiop $DIR/$tfile oO_CREAT:O_RDWR:O_SYNC:w4096c
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    do_facet ost1 lctl set_param fail_loc=0
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    # check for log message
    $LCTL dk | grep "Early reply #" || error "No early reply"
    debugrestore
    # client should show 30s estimates
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    lctl get_param -n osc.${FSNAME}-OST0000-osc-*.timeouts | grep portal
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}
run_test 65b "AT: verify early replies on packed reply / bulk"
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test_66a() #bug 3055
{
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    at_start || return 0
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    lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts | grep "portal 12"
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    # adjust 5s at a time so no early reply is sent (within deadline)
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    do_facet mds "lctl set_param fail_val=5000"
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#define OBD_FAIL_PTLRPC_PAUSE_REQ        0x50a
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    do_facet mds "lctl set_param fail_loc=0x8000050a"
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    createmany -o $DIR/$tfile 20 > /dev/null
    unlinkmany $DIR/$tfile 20 > /dev/null
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    lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts | grep "portal 12"
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    do_facet mds "lctl set_param fail_val=10000"
    do_facet mds "lctl set_param fail_loc=0x8000050a"
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    createmany -o $DIR/$tfile 20 > /dev/null
    unlinkmany $DIR/$tfile 20 > /dev/null
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    lctl get_param -n mdc.${FSNAME}-MDT0000-mdc-*.timeouts | grep "portal 12"
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    do_facet mds "lctl set_param fail_loc=0"
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    sleep 9
    createmany -o $DIR/$tfile 20 > /dev/null
    unlinkmany $DIR/$tfile 20 > /dev/null
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    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}')
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    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
{
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    at_start || return 0
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    ORIG=$(lctl get_param -n mdc.${FSNAME}-*.timeouts | awk '/network/ {print $4}')
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    lctl set_param fail_val=$(($ORIG + 5))
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#define OBD_FAIL_PTLRPC_PAUSE_REP      0x50c
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    lctl set_param fail_loc=0x50c
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    ls $DIR/$tfile > /dev/null 2>&1
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    lctl set_param fail_loc=0
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    CUR=$(lctl get_param -n mdc.${FSNAME}-*.timeouts | awk '/network/ {print $4}')
    WORST=$(lctl get_param -n mdc.${FSNAME}-*.timeouts | awk '/network/ {print $6}')
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    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
{
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    at_start || return 0
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    CONN1=$(lctl get_param -n osc.*.stats | awk '/_connect/ {total+=$2} END {print total}')
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    # sleeping threads may drive values above this
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    do_facet ost1 "lctl set_param fail_val=400"
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#define OBD_FAIL_PTLRPC_PAUSE_REQ    0x50a
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    do_facet ost1 "lctl set_param fail_loc=0x50a"
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    createmany -o $DIR/$tfile 20 > /dev/null
    unlinkmany $DIR/$tfile 20 > /dev/null
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    do_facet ost1 "lctl set_param fail_loc=0"
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    CONN2=$(lctl get_param -n osc.*.stats | awk '/_connect/ {total+=$2} END {print total}')
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    ATTEMPTS=$(($CONN2 - $CONN1))
    echo "$ATTEMPTS osc reconnect attemps on gradual slow"
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    [ $ATTEMPTS -gt 0 ] && error_ignore 13721 "AT should have prevented reconnect"
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    return 0
}
run_test 67a "AT: verify slow request processing doesn't induce reconnects"

test_67b() #bug 3055
{
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    at_start || return 0
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    CONN1=$(lctl get_param -n osc.*.stats | awk '/_connect/ {total+=$2} END {print total}')
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#define OBD_FAIL_OST_PAUSE_CREATE        0x223
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    do_facet ost1 "lctl set_param fail_val=20000"
    do_facet ost1 "lctl set_param fail_loc=0x80000223"
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    cp /etc/profile $DIR/$tfile || error "cp failed"
    client_reconnect
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    lctl get_param -n ost.OSS.ost_create.timeouts
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    log "phase 2"
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    CONN2=$(lctl get_param -n osc.*.stats | awk '/_connect/ {total+=$2} END {print total}')
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    ATTEMPTS=$(($CONN2 - $CONN1))
    echo "$ATTEMPTS osc reconnect attemps on instant slow"
    # do it again; should not timeout
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    do_facet ost1 "lctl set_param fail_loc=0x80000223"
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    cp /etc/profile $DIR/$tfile || error "cp failed"
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    do_facet ost1 "lctl set_param fail_loc=0"
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    client_reconnect
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    lctl get_param -n ost.OSS.ost_create.timeouts
    CONN3=$(`lctl get_param -n osc.*.stats` | awk '/_connect/ {total+=$2} END {print total}')
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    ATTEMPTS=$(($CONN3 - $CONN2))
    echo "$ATTEMPTS osc reconnect attemps on 2nd slow"
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    [ $ATTEMPTS -gt 0 ] && error "AT should have prevented reconnect"
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    return 0
}
run_test 67b "AT: verify instant slowdown doesn't induce reconnects"

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test_68 () #bug 13813
{
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    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
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    rm -f $DIR/${tfile}_[1-2]
    lfs setstripe $DIR/$tfile --index=0 --count=1
#define OBD_FAIL_LDLM_PAUSE_CANCEL       0x312
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    lctl set_param fail_val=$(($TIMEOUT - 1))
    lctl set_param fail_loc=0x80000312
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    cp /etc/profile $DIR/${tfile}_1 || error "1st cp failed $?"
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    lctl set_param fail_val=$((TIMEOUT * 3 / 2))
    lctl set_param fail_loc=0x80000312
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    cp /etc/profile $DIR/${tfile}_2 || error "2nd cp failed $?"
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    lctl set_param fail_loc=0
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    echo $ENQ_MIN >> $ldlm_enqueue_min
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    return 0
}
run_test 68 "AT: verify slowing locks"

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if [ -n "$ATOLDBASE" ]; then
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    at_history=$(do_facet mds "find /sys/ -name at_history")
    do_facet mds "echo $ATOLDBASE >> $at_history" || true
    do_facet ost1 "echo $ATOLDBASE >> $at_history" || true
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fi
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if [ $AT_MAX_SET -ne 0 ]; then
    echo "restore AT status to be disabled"
    at_max_set 0 mds ost client
fi

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# end of AT tests includes above lines

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# 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/^.* \(\w\+\)$/\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

	zconf_umount_clients $CLIENTS $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="-t 60"
	local cmd="rundbench 1 $duration "
	local PID=""
	for CLIENT in ${CLIENTS//,/ }; do
		$PDSH $CLIENT "set -x; PATH=:$PATH:$LUSTRE/utils:$LUSTRE/tests/:${DBENCH_LIB} DBENCH_LIB=${DBENCH_LIB} $cmd" &
		PID=$!
		echo $PID >pid.$CLIENT
		echo "Started load PID=`cat pid.$CLIENT`"
	done

	replay_barrier mds 
	sleep 3 # give clients a time to do operations

	log "$TESTNAME fail mds 1"
	fail mds

# wait for client to reconnect to MDS
	sleep $TIMEOUT

	for CLIENT in ${CLIENTS//,/ }; do
		PID=`cat pid.$CLIENT`
		wait $PID
		rc=$?
		echo "load on ${CLIENT} returned $rc"
	done

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

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