summaryrefslogtreecommitdiffstats
path: root/ldap/servers/slapd/back-ldbm/import.c
blob: 9513a8bf4da77014901380b6892db92c13df1592 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
/** BEGIN COPYRIGHT BLOCK
 * This Program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; version 2 of the License.
 * 
 * This Program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this Program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place, Suite 330, Boston, MA 02111-1307 USA.
 * 
 * In addition, as a special exception, Red Hat, Inc. gives You the additional
 * right to link the code of this Program with code not covered under the GNU
 * General Public License ("Non-GPL Code") and to distribute linked combinations
 * including the two, subject to the limitations in this paragraph. Non-GPL Code
 * permitted under this exception must only link to the code of this Program
 * through those well defined interfaces identified in the file named EXCEPTION
 * found in the source code files (the "Approved Interfaces"). The files of
 * Non-GPL Code may instantiate templates or use macros or inline functions from
 * the Approved Interfaces without causing the resulting work to be covered by
 * the GNU General Public License. Only Red Hat, Inc. may make changes or
 * additions to the list of Approved Interfaces. You must obey the GNU General
 * Public License in all respects for all of the Program code and other code used
 * in conjunction with the Program except the Non-GPL Code covered by this
 * exception. If you modify this file, you may extend this exception to your
 * version of the file, but you are not obligated to do so. If you do not wish to
 * provide this exception without modification, you must delete this exception
 * statement from your version and license this file solely under the GPL without
 * exception. 
 * 
 * 
 * Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
 * Copyright (C) 2005 Red Hat, Inc.
 * All rights reserved.
 * END COPYRIGHT BLOCK **/

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

/*
 * the "new" ("deluxe") backend import code
 *
 * please make sure you use 4-space indentation on this file.
 */


#include "back-ldbm.h"
#include "vlv_srch.h"
#include "import.h"

#define ERR_IMPORT_ABORTED      -23


/********** routines to manipulate the entry fifo **********/

/* this is pretty bogus -- could be a HUGE amount of memory */
/* Not anymore with the Import Queue Adaptative Algorithm (Regulation) */
#define MAX_FIFO_SIZE    8000

static int import_fifo_init(ImportJob *job)
{
    ldbm_instance *inst = job->inst;

    /* Work out how big the entry fifo can be */
    if (inst->inst_cache.c_maxentries > 0)
    job->fifo.size = inst->inst_cache.c_maxentries;
    else
    job->fifo.size = inst->inst_cache.c_maxsize / 1024;    /* guess */

    /* byte limit that should be respected to avoid memory starvation */
    /* conservative computing: multiply by .8 to allow for reasonable overflow */
    job->fifo.bsize = (inst->inst_cache.c_maxsize/10) << 3;

    job->fifo.c_bsize = 0;
    
    if (job->fifo.size > MAX_FIFO_SIZE)
    job->fifo.size = MAX_FIFO_SIZE;
    /* has to be at least 1 or 2, and anything less than about 100 destroys
     * the point of doing all this optimization in the first place. */
    if (job->fifo.size < 100)
        job->fifo.size = 100;

    /* Get memory for the entry fifo */
    /* This is used to keep a ref'ed pointer to the last <cachesize> 
     * processed entries */
    PR_ASSERT(NULL == job->fifo.item);
    job->fifo.item = (FifoItem *)slapi_ch_calloc(job->fifo.size,
                         sizeof(FifoItem));
    if (NULL == job->fifo.item) {
    /* Memory allocation error */
    return -1;
    }
    return 0;
}

FifoItem *import_fifo_fetch(ImportJob *job, ID id, int worker, int shift)
{
    int idx = id % job->fifo.size;
    FifoItem *fi;

    if (job->fifo.item) {
    fi = &(job->fifo.item[idx]);
    } else {
    return NULL;
    }
    if (fi->entry) {
        if (id != fi->entry->ep_id - shift)
            fi = NULL;
        else if (worker) {
            if (fi->bad) return NULL;
            PR_ASSERT(fi->entry->ep_refcnt > 0);
        }
    }
    return fi;
}

static void import_fifo_destroy(ImportJob *job)
{
    /* Free any entries in the fifo first */
    struct backentry *be = NULL;
    size_t i = 0;

    for (i = 0; i < job->fifo.size; i++) {
        be = job->fifo.item[i].entry;
        backentry_free(&be);
        job->fifo.item[i].entry = NULL;
        job->fifo.item[i].filename = NULL;
    }
    free(job->fifo.item);
    job->fifo.item = NULL;
}


/********** logging stuff **********/

#define LOG_BUFFER        256

/* this changes the 'nsTaskStatus' value, which is transient (anything logged
 * here wipes out any previous status)
 */
static void import_log_status_start(ImportJob *job)
{
    if (! job->task_status)
    job->task_status = (char *)slapi_ch_malloc(10 * LOG_BUFFER);
    if (! job->task_status)
    return;        /* out of memory? */

    job->task_status[0] = 0;
}

static void import_log_status_add_line(ImportJob *job, char *format, ...)
{
    va_list ap;
    int len = 0;

    if (! job->task_status)
        return;
    len = strlen(job->task_status);
    if (len + 5 > (10 * LOG_BUFFER))
        return;         /* no room */

    if (job->task_status[0])
        strcat(job->task_status, "\n");

    va_start(ap, format);
    PR_vsnprintf(job->task_status + len, (10 * LOG_BUFFER) - len, format, ap);
    va_end(ap);
}

static void import_log_status_done(ImportJob *job)
{
    if (job->task) {
        int len = 0;
        len = strlen(job->task_status);
        slapi_task_log_status(job->task, "%s", job->task_status);
    }
}

/* this adds a line to the 'nsTaskLog' value, which is cumulative (anything
 * logged here is added to the end)
 */
void import_log_notice(ImportJob *job, char *format, ...)
{
    va_list ap;
    char buffer[LOG_BUFFER];

    va_start(ap, format);
    PR_vsnprintf(buffer, LOG_BUFFER, format, ap);
    va_end(ap);

    if (job->task) {
        slapi_task_log_notice(job->task, "%s", buffer);
    }
    /* also save it in the logs for posterity */
    LDAPDebug(LDAP_DEBUG_ANY, "import %s: %s\n", job->inst->inst_name,
          buffer, 0);
}

static int import_task_destroy(Slapi_Task *task)
{
    ImportJob *job = (ImportJob *)task->task_private;

    if (task->task_log) {
        slapi_ch_free((void **)&task->task_log);
    }

    if (task->task_status) {
        slapi_ch_free((void **)&task->task_status);
    }
    

    if (job && job->task_status) {
        slapi_ch_free((void **)&job->task_status);
        job->task_status = NULL;
    }
    FREE(job);
    task->task_private = NULL;
    return 0;
}

static int import_task_abort(Slapi_Task *task)
{
    ImportJob *job;

    /* don't log anything from here, because we're still holding the
     * DSE lock for modify...
     */

    if (task->task_state == SLAPI_TASK_FINISHED) {
        /* too late */
        return 0;
    }

    /*
     * Race condition.
     * If the import thread happens to finish right now we're in trouble
     * because it will free the job.
     */

    job = (ImportJob *)task->task_private;

    import_abort_all(job, 0); 
    while (task->task_state != SLAPI_TASK_FINISHED)
         DS_Sleep(PR_MillisecondsToInterval(100));


    return 0;
}


/********** helper functions for importing **********/


/* Function used to gather a list of indexed attrs */
static int import_attr_callback(void *node, void *param)
{
    ImportJob *job = (ImportJob *)param;
    struct attrinfo *a = (struct attrinfo *)node;

    /* OK, so we now have hold of the attribute structure and the job info, 
     * let's see what we have.  Remember that although this function is called
     * many times, all these calls are in the context of a single thread, so we
     * don't need to worry about protecting the data in the job structure.
     */

    /* We need to specifically exclude the entrydn & parentid indexes because
     * we build those in the foreman thread.
     */
    if (IS_INDEXED(a->ai_indexmask) &&
    (strcasecmp(a->ai_type, "entrydn") != 0) &&
    (strcasecmp(a->ai_type, "parentid") != 0) &&
    (strcasecmp(a->ai_type, "ancestorid") != 0) &&
    (strcasecmp(a->ai_type, numsubordinates) != 0)) {
    /* Make an import_index_info structure, fill it in and insert into the
     * job's list */
    IndexInfo *info = CALLOC(IndexInfo);
    
    if (NULL == info) {
        /* Memory allocation error */
        return -1;
    }
    info->name = slapi_ch_strdup(a->ai_type);
    info->ai = a;
    if (NULL == info->name) {
        /* Memory allocation error */
        free(info);
        return -1;
    }
    info->next = job->index_list;
    job->index_list = info;
    job->number_indexers++;
    }
    return 0;
}

static void import_set_index_buffer_size(ImportJob *job)
{
    IndexInfo *current_index = NULL;
    size_t substring_index_count = 0;
    size_t proposed_size = 0;

    /* Count the substring indexes we have */
    for (current_index = job->index_list; current_index != NULL;
     current_index = current_index->next)  {
    if (current_index->ai->ai_indexmask & INDEX_SUB) {
        substring_index_count++;
    }
    }
    if (substring_index_count > 0) {
    /* Make proposed size such that if all substring indices were
     * reasonably full, we'd hit the target space */
    proposed_size = (job->job_index_buffer_size / substring_index_count) /
        IMPORT_INDEX_BUFFER_SIZE_CONSTANT;
    if (proposed_size > IMPORT_MAX_INDEX_BUFFER_SIZE) {
        proposed_size = IMPORT_MAX_INDEX_BUFFER_SIZE;
    }
    if (proposed_size < IMPORT_MIN_INDEX_BUFFER_SIZE) {
        proposed_size = 0;
    }
    }

    job->job_index_buffer_suggestion = proposed_size;
}

static void import_free_thread_data(ImportJob *job)
{
    /* DBDB free the lists etc */
    ImportWorkerInfo *worker = job->worker_list;

    while (worker != NULL) {
    ImportWorkerInfo *asabird = worker;
    worker = worker->next;
    if (asabird->work_type != PRODUCER)
        slapi_ch_free( (void**)&asabird);
    }
}

void import_free_job(ImportJob *job)
{
    /* DBDB free the lists etc */
    IndexInfo *index = job->index_list;

    import_free_thread_data(job);
    while (index != NULL) {
        IndexInfo *asabird = index;
        index = index->next;
        slapi_ch_free( (void**)&asabird->name);
        slapi_ch_free( (void**)&asabird);
    }
    job->index_list = NULL;
    if (NULL != job->mothers) {
        import_subcount_stuff_term(job->mothers);
        slapi_ch_free( (void**)&job->mothers);
    }
    
    ldbm_back_free_incl_excl(job->include_subtrees, job->exclude_subtrees);
    charray_free(job->input_filenames);
    if (job->fifo.size)
        import_fifo_destroy(job);
    if (NULL != job->uuid_namespace)
        slapi_ch_free((void **)&job->uuid_namespace);
    if (job->wire_lock)
        PR_DestroyLock(job->wire_lock);
    if (job->wire_cv)
        PR_DestroyCondVar(job->wire_cv);
    slapi_ch_free((void **)&job->task_status);
}

/* determine if we are the correct backend for this entry
 * (in a distributed suffix, some entries may be for other backends).
 * if the entry's dn actually matches one of the suffixes of the be, we 
 * automatically take it as a belonging one, for such entries must be 
 * present in EVERY backend independently of the distribution applied.
 */
int import_entry_belongs_here(Slapi_Entry *e, backend *be)
{
    Slapi_Backend *retbe;
    Slapi_DN *sdn = slapi_entry_get_sdn(e);

    if (slapi_be_issuffix(be, sdn))
        return 1;

    retbe = slapi_mapping_tree_find_backend_for_sdn(sdn);
    return (retbe == be);
}


/********** starting threads and stuff **********/

/* Solaris is weird---we need an LWP per thread but NSPR doesn't give us
 * one unless we make this magic belshe-call */
/* Fixed on Solaris 8; NSPR supports PR_GLOBAL_BOUND_THREAD */
#define CREATE_THREAD PR_CreateThread

static void import_init_worker_info(ImportWorkerInfo *info, ImportJob *job)
{
    info->command = PAUSE; 
    info->job = job;
    info->first_ID = job->first_ID;
    info->index_buffer_size = job->job_index_buffer_suggestion;
}

static int import_start_threads(ImportJob *job)
{
    IndexInfo *current_index = NULL;
    ImportWorkerInfo *foreman = NULL, *worker = NULL;

    foreman = CALLOC(ImportWorkerInfo);
    if (!foreman)
    goto error;

    /* start the foreman */
    import_init_worker_info(foreman, job);
    foreman->work_type = FOREMAN;
    if (! CREATE_THREAD(PR_USER_THREAD, (VFP)import_foreman, foreman,
            PR_PRIORITY_NORMAL, PR_GLOBAL_BOUND_THREAD,
            PR_UNJOINABLE_THREAD, SLAPD_DEFAULT_THREAD_STACKSIZE)) {    
        PRErrorCode prerr = PR_GetError();
        LDAPDebug(LDAP_DEBUG_ANY, "unable to spawn import foreman thread, "
                SLAPI_COMPONENT_NAME_NSPR " error %d (%s)\n",
                prerr, slapd_pr_strerror(prerr), 0);
        FREE(foreman);
        goto error;
    }

    foreman->next = job->worker_list;
    job->worker_list = foreman;
    
    /* Start follower threads, if we are doing attribute indexing */
    current_index = job->index_list;
    if (job->flags & FLAG_INDEX_ATTRS) {
    while (current_index) {
        /* make a new thread info structure */
        worker = CALLOC(ImportWorkerInfo);
        if (! worker)
        goto error;

        /* fill it in */
        import_init_worker_info(worker, job);
        worker->index_info = current_index;
        worker->work_type = WORKER;

        /* Start the thread */
        if (! CREATE_THREAD(PR_USER_THREAD, (VFP)import_worker, worker,
                PR_PRIORITY_NORMAL, PR_GLOBAL_BOUND_THREAD,
                PR_UNJOINABLE_THREAD,
                SLAPD_DEFAULT_THREAD_STACKSIZE)) {
            PRErrorCode prerr = PR_GetError();
            LDAPDebug(LDAP_DEBUG_ANY, "unable to spawn import worker thread, "
                    SLAPI_COMPONENT_NAME_NSPR " error %d (%s)\n",
                    prerr, slapd_pr_strerror(prerr), 0);
            FREE(worker);
            goto error;
        }

        /* link it onto the job's thread list */
        worker->next = job->worker_list;
        job->worker_list = worker;
        current_index = current_index->next;
    }
    }
    return 0;

error:
    import_log_notice(job, "Import thread creation failed.");
    import_log_notice(job, "Aborting all import threads...");
    import_abort_all(job, 1);
    import_log_notice(job, "Import threads aborted.");
    return -1;
}


/********** monitoring the worker threads **********/

static void import_clear_progress_history(ImportJob *job)
{
    int i = 0;

    for (i = 0; i < IMPORT_JOB_PROG_HISTORY_SIZE /*- 1*/; i++) {
    job->progress_history[i] = job->first_ID;
    job->progress_times[i] = job->start_time;
    }
    /* reset libdb cache stats */
    job->inst->inst_cache_hits = job->inst->inst_cache_misses = 0;
}

static double import_grok_db_stats(ldbm_instance *inst)
{
    DB_MPOOL_STAT *mpstat = NULL;
    DB_MPOOL_FSTAT **mpfstat = NULL;
    int return_value = -1;
    double cache_hit_ratio = 0.0;

    return_value = dblayer_memp_stat_instance(inst, &mpstat, &mpfstat);

    if (0 == return_value) {
    unsigned long current_cache_hits = mpstat->st_cache_hit;
    unsigned long current_cache_misses = mpstat->st_cache_miss;
    
    if (inst->inst_cache_hits) {
        unsigned long hit_delta, miss_delta;

        hit_delta = current_cache_hits - inst->inst_cache_hits;
        miss_delta = current_cache_misses - inst->inst_cache_misses;
        if (hit_delta != 0) {
        cache_hit_ratio = (double)hit_delta /
            (double)(hit_delta + miss_delta);
        }
    }
    inst->inst_cache_misses = current_cache_misses;
    inst->inst_cache_hits = current_cache_hits;

    if (mpstat)
        free(mpstat);
    if (mpfstat) {
#if 1000*DB_VERSION_MAJOR + 100*DB_VERSION_MINOR + DB_VERSION_PATCH <= 3204
            /* In DB 3.2.4 and earlier, we need to free each element */
        DB_MPOOL_FSTAT **tfsp;
        for (tfsp = mpfstat; *tfsp; tfsp++)
        free(*tfsp);
#endif
        free(mpfstat);
    }
    }
    return cache_hit_ratio;
}

static char* import_decode_worker_state(int state)
{
    switch (state) {
    case WAITING:
        return "W";
    case RUNNING:
        return "R";
    case FINISHED:
        return "F";
    case ABORTED:
        return "A";
    default:
        return "?";
    }
}

static void import_print_worker_status(ImportWorkerInfo *info)
{
    char *name = (info->work_type == PRODUCER ? "Producer" :
                  (info->work_type == FOREMAN ? "Foreman" :
                   info->index_info->name));

    import_log_status_add_line(info->job,
                               "%-25s %s%10ld %7.1f", name,
                               import_decode_worker_state(info->state),
                               info->last_ID_processed, info->rate);
}


#define IMPORT_CHUNK_TEST_HOLDOFF_TIME (5*60)    /* Seconds */

/* Got to be lower than this: */
#define IMPORT_CHUNK_TEST_CACHE_HIT_RATIO (0.99)
/* Less than half as fast as we were doing: */
#define IMPORT_CHUNK_TEST_SLOWDOWN_RATIO_A (0.5)
/* A lot less fast than we were doing: */
#define IMPORT_CHUNK_TEST_SLOWDOWN_RATIO_B (0.1)

static int import_throw_in_towel(ImportJob *job, time_t current_time,
                                 ID trailing_ID)
{
    static int number_of_times_here = 0;

    /* secret -c option allows specific chunk size to be set... */
    if (job->merge_chunk_size != 0) {
    if ((0 != job->lead_ID) &&
            (trailing_ID > job->first_ID) &&
        (trailing_ID - job->first_ID > job->merge_chunk_size)) {
        return 1;
    }
    return 0;
    }

    /* Check stats to decide whether we're getting bogged down and should
     * terminate this pass.
     */

    /* Check #1 : are we more than 10 minutes into the chunk ? */
    if (current_time - job->start_time > IMPORT_CHUNK_TEST_HOLDOFF_TIME) {
    /* Check #2 : Have we slowed down considerably recently ? */
    if ((job->recent_progress_rate / job->average_progress_rate) < 
        IMPORT_CHUNK_TEST_SLOWDOWN_RATIO_A) {
        /* Check #3: Cache performing poorly---the puported reason
         * for the slowdown */
        if (job->cache_hit_ratio < IMPORT_CHUNK_TEST_CACHE_HIT_RATIO) {
        /* We have a winner ! */
        import_log_notice(job, "Decided to end this pass because "
                  "the progress rate has dropped below "
                  "the %.0f%% threshold.",
                  IMPORT_CHUNK_TEST_SLOWDOWN_RATIO_A*100.0);
        return 1;
        }
    } else {
        if ((job->recent_progress_rate / job->average_progress_rate) <
        IMPORT_CHUNK_TEST_SLOWDOWN_RATIO_B) {
        /* Alternative check: have we really, really slowed down, 
         * without the test for cache overflow? */
        /* This is designed to catch the case where the cache has
         * been misconfigured too large */
        if (number_of_times_here > 10) {
            /* Got to get here ten times at least */
            import_log_notice(job, "Decided to end this pass "
                      "because the progress rate "
                      "plummeted below %.0f%%",
                      IMPORT_CHUNK_TEST_SLOWDOWN_RATIO_B*100.0);
            return 1;
        }
        number_of_times_here++;
        }
    }
    }

    number_of_times_here = 0;
    return 0;
}

static void import_push_progress_history(ImportJob *job, ID current_id,
                     time_t current_time)
{
    int i = 0;

    for (i = 0; i < IMPORT_JOB_PROG_HISTORY_SIZE - 1; i++) {
    job->progress_history[i] = job->progress_history[i+1];
    job->progress_times[i] = job->progress_times[i+1];
    }
    job->progress_history[i] = current_id;
    job->progress_times[i] = current_time;
}

static void import_calc_rate(ImportWorkerInfo *info, int time_interval)
{
    size_t ids = info->last_ID_processed - info->previous_ID_counted;
    double rate = (double)ids / time_interval;
    
    if ( (info->previous_ID_counted != 0) && (info->last_ID_processed != 0) ) {
    info->rate = rate;
    } else {
    info->rate = 0;
    }
    info->previous_ID_counted = info->last_ID_processed;
}

/* find the rate (ids/time) of work from a worker thread between history
 * marks A and B.
 */
#define HISTORY(N)    (job->progress_history[N])
#define TIMES(N)    (job->progress_times[N])
#define PROGRESS(A, B)    ((HISTORY(B) > HISTORY(A)) ? \
                           ((double)(HISTORY(B) - HISTORY(A)) /    \
                            (double)(TIMES(B) - TIMES(A))) : \
                           (double)0)

static int import_monitor_threads(ImportJob *job, int *status)
{
    PRIntervalTime tenthsecond = PR_MillisecondsToInterval(100);
    ImportWorkerInfo *current_worker = NULL;
    ImportWorkerInfo *producer = NULL, *foreman = NULL;
    int finished = 0;
    int giveup = 0;
    int count = 1;              /* 1 to prevent premature status report */
    int producer_done = 0;
    const int display_interval = 200;
    time_t time_now = 0;
    time_t last_time = 0;
    time_t time_interval = 0;


    for (current_worker = job->worker_list; current_worker != NULL; 
         current_worker = current_worker->next) {
        current_worker->command = RUN;
        if (current_worker->work_type == PRODUCER)
            producer = current_worker;
        if (current_worker->work_type == FOREMAN)
            foreman = current_worker;
    }


    if (job->flags & FLAG_USE_FILES)
        PR_ASSERT(producer != NULL);
    PR_ASSERT(foreman != NULL);

    time(&last_time);
    job->start_time = last_time;
    import_clear_progress_history(job);

    while (!finished) {
        ID trailing_ID = NOID;

        DS_Sleep(tenthsecond);
        finished = 1;

        /* First calculate the time interval since last reported */
        if (0 == (count % display_interval)) {
            time(&time_now);
            time_interval = time_now - last_time;
            last_time = time_now;
            /* Now calculate our rate of progress overall for this chunk */
            if (time_now != job->start_time) {
                /* log a cute chart of the worker progress */
                import_log_status_start(job);
                import_log_status_add_line(job,
                    "Index status for import of %s:", job->inst->inst_name);
                import_log_status_add_line(job,
                    "-------Index Task-------State---Entry----Rate-");

                import_push_progress_history(job, foreman->last_ID_processed,
                                             time_now);
                job->average_progress_rate = 
                    (double)(HISTORY(IMPORT_JOB_PROG_HISTORY_SIZE-1)+1 - foreman->first_ID) /
                    (double)(TIMES(IMPORT_JOB_PROG_HISTORY_SIZE-1) - job->start_time);
                job->recent_progress_rate =
                    PROGRESS(0, IMPORT_JOB_PROG_HISTORY_SIZE-1);
                job->cache_hit_ratio = import_grok_db_stats(job->inst);
            }
        }

        for (current_worker = job->worker_list; current_worker != NULL;
             current_worker = current_worker->next) {
            /* Calculate the ID at which the slowest worker is currently
             * processing */
            if ((trailing_ID > current_worker->last_ID_processed) &&
                (current_worker->work_type == WORKER)) {
                trailing_ID = current_worker->last_ID_processed;
            }
            if (0 == (count % display_interval) && time_interval) {
                import_calc_rate(current_worker, time_interval);
                import_print_worker_status(current_worker);
            }
            if (current_worker->state != FINISHED) {
                finished = 0;
            }
            if (current_worker->state == ABORTED) {
                goto error_abort;
            }
        }

        if ((0 == (count % display_interval)) &&
            (job->start_time != time_now)) {
            char buffer[256], *p = buffer;

            import_log_status_done(job);
            p += sprintf(p, "Processed %lu entries ", (u_long)job->ready_ID);
            if (job->total_pass > 1)
                p += sprintf(p, "(pass %d) ", job->total_pass);

            p += sprintf(p, "-- average rate %.1f/sec, ",
                         job->average_progress_rate);
            p += sprintf(p, "recent rate %.1f/sec, ",
                         job->recent_progress_rate);
            p += sprintf(p, "hit ratio %.0f%%", job->cache_hit_ratio * 100.0);
            import_log_notice(job, "%s", buffer);
        }

        /* Then let's see if it's time to complete this import pass */
        if (!giveup) {
            giveup = import_throw_in_towel(job, time_now, trailing_ID);
            if (giveup) {
                /* If so, signal the lead thread to stop */
                import_log_notice(job, "Ending pass number %d ...",
                                  job->total_pass);
                foreman->command = STOP;
                while (foreman->state != FINISHED) {
                    DS_Sleep(tenthsecond);
                }
                import_log_notice(job, "Foreman is done; waiting for "
                                  "workers to finish...");
            }
        }

        /* if the producer is finished, and the foreman has caught up... */
        if (producer) {
            producer_done = (producer->state == FINISHED);
        } else {
            producer_done = (job->flags & FLAG_PRODUCER_DONE);
        }
        if (producer_done && (job->lead_ID == job->ready_ID)) {
            /* tell the foreman to stop if he's still working. */
            if (foreman->state != FINISHED)
                foreman->command = STOP;

            /* if all the workers are caught up too, we're done */
            if (trailing_ID == job->lead_ID)
                break;
        }

        /* if the foreman is done (end of pass) and the worker threads
         * have caught up...
         */
        if ((foreman->state == FINISHED) && (job->ready_ID == trailing_ID)) {
            break;
        }

        count++;
    }

    import_log_notice(job, "Workers finished; cleaning up...");

    /* Now tell all the workers to stop */
    for (current_worker = job->worker_list; current_worker != NULL;
         current_worker = current_worker->next) {
        if (current_worker->work_type != PRODUCER)
            current_worker->command = STOP;
    }

    /* Having done that, wait for them to say that they've stopped */
    for (current_worker = job->worker_list; current_worker != NULL; ) {
        if ((current_worker->state != FINISHED) &&
            (current_worker->state != ABORTED) &&
            (current_worker->work_type != PRODUCER)) {
            DS_Sleep(tenthsecond);    /* Only sleep if we hit a thread that is still not done */
            continue;
        } else {
            current_worker = current_worker->next;
        }
    }
    import_log_notice(job, "Workers cleaned up.");

    /* If we're here and giveup is true, and the primary hadn't finished
     * processing the input files, we need to return IMPORT_INCOMPLETE_PASS */
    if (giveup && (job->input_filenames || (job->flags & FLAG_ONLINE) ||
                   (job->flags & FLAG_REINDEXING /* support multi-pass */))) {
        if (producer_done && (job->ready_ID == job->lead_ID)) {
            /* foreman caught up with the producer, and the producer is
             * done.
             */
            *status = IMPORT_COMPLETE_PASS;
        } else {
            *status = IMPORT_INCOMPLETE_PASS;
        }
    } else {
        *status = IMPORT_COMPLETE_PASS;
    }
    return 0;

error_abort:
    return ERR_IMPORT_ABORTED;
}


/********** running passes **********/

static int import_run_pass(ImportJob *job, int *status)
{
    int ret = 0;

    /* Start the threads running */
    ret = import_start_threads(job);
    if (ret != 0) {
        import_log_notice(job, "Starting threads failed: %d\n", ret);
    goto error;
    }

    /* Monitor the threads until we're done or fail */
    ret = import_monitor_threads(job, status);
    if (ret == ERR_IMPORT_ABORTED) {
        goto error;
    } else if (ret != 0) {
        import_log_notice(job, "Thread monitoring aborted: %d\n", ret);
    goto error;
    }

error:
    return ret;
}

static void import_set_abort_flag_all(ImportJob *job, int wait_for_them)
{

    ImportWorkerInfo *worker;

    /* tell all the worker threads to abort */
    job->flags |= FLAG_ABORT;

    /* setting of the flag in the job will be detected in the worker, foreman
     * threads and if there are any threads which have a sleeptime  200 msecs
     * = import_sleep_time; after that time, they will examine the condition
     * (job->flags & FLAG_ABORT) which will unblock the thread to proceed to
     * abort. Hence, we will sleep here for atleast 3 sec to make sure clean
     * up occurs */
        /* allow all the aborts to be processed */
             DS_Sleep(PR_MillisecondsToInterval(3000)); 

     if (wait_for_them) {
        /* Having done that, wait for them to say that they've stopped */
        for (worker = job->worker_list; worker != NULL; ) {
            DS_Sleep(PR_MillisecondsToInterval(100));
            if ((worker->state != FINISHED) &&
                (worker->state != ABORTED)){
                continue;
        }
            else{
                worker = worker->next;
        }
        }
    }

}


/* tell all the threads to abort */
void import_abort_all(ImportJob *job, int wait_for_them)
{
    ImportWorkerInfo *worker;

    /* tell all the worker threads to abort */
    job->flags |= FLAG_ABORT;
    
    for (worker = job->worker_list; worker; worker = worker->next)
        worker->command = ABORT;

    if (wait_for_them) {
        /* Having done that, wait for them to say that they've stopped */
        for (worker = job->worker_list; worker != NULL; ) {
            DS_Sleep(PR_MillisecondsToInterval(100));
            if ((worker->state != FINISHED) &&
                (worker->state != ABORTED))
                continue;
            else
                worker = worker->next;
        }
    }
}

/* Helper function to make up filenames */
int import_make_merge_filenames(char *directory, char *indexname, int pass,
                char **oldname, char **newname)
{
    /* Filenames look like this: attributename<LDBM_FILENAME_SUFFIX> 
       and need to be renamed to: attributename<LDBM_FILENAME_SUFFIX>.n
       where n is the pass number.
       */
    *oldname = slapi_ch_smprintf("%s/%s%s", directory, indexname, LDBM_FILENAME_SUFFIX);
    *newname = slapi_ch_smprintf("%s/%s.%d%s", directory, indexname, pass,
        LDBM_FILENAME_SUFFIX);
	if (!*oldname || !*newname) {
		slapi_ch_free_string(oldname);
		slapi_ch_free_string(newname);
		return -1;
	}
    return 0;
}

/* Task here is as follows:
 * First, if this is pass #1, check for the presence of a merge
 *     directory. If it is not present, create it.
 * If it is present, delete all the files in it.
 * Then, flush the dblayer and close files.
 * Now create a numbered subdir of the merge directory for this pass.
 * Next, move the index files, except entrydn, parentid and id2entry to 
 *     the merge subdirectory. Important to move if we can, because
 *     that can be millions of times faster than a copy.
 * Finally open the dblayer back up because the caller expects 
 *     us to not muck with it.
 */
static int import_sweep_after_pass(ImportJob *job)
{
    backend *be = job->inst->inst_be;
    int ret = 0;

    import_log_notice(job, "Sweeping files for merging later...");

    ret = dblayer_instance_close(be);
    
    if (0 == ret) {
    /* Walk the list of index jobs */
    ImportWorkerInfo *current_worker = NULL;
    
    for (current_worker = job->worker_list; current_worker != NULL;
         current_worker = current_worker->next) {
        /* Foreach job, rename the file to <filename>.n, where n is the 
         * pass number */
        if ((current_worker->work_type != FOREMAN) && 
        (current_worker->work_type != PRODUCER) && 
        (strcasecmp(current_worker->index_info->name, "parentid") != 0)) {
        char *newname = NULL;
        char *oldname = NULL;

        ret = import_make_merge_filenames(job->inst->inst_dir_name,
            current_worker->index_info->name, job->current_pass,
            &oldname, &newname);
        if (0 != ret) {
            break;
        }
        if (PR_Access(oldname, PR_ACCESS_EXISTS) == PR_SUCCESS) {
            ret = PR_Rename(oldname, newname);
            if (ret != PR_SUCCESS) {
                PRErrorCode prerr = PR_GetError();
                import_log_notice(job, "Failed to rename file \"%s\" to \"%s\", "
                    SLAPI_COMPONENT_NAME_NSPR " error %d (%s)",
                    oldname, newname, prerr, slapd_pr_strerror(prerr));
                slapi_ch_free( (void**)&newname);
                slapi_ch_free( (void**)&oldname);
                break;
            }
        }
        slapi_ch_free( (void**)&newname);
        slapi_ch_free( (void**)&oldname);
        }
    }

    ret = dblayer_instance_start(be, DBLAYER_IMPORT_MODE);
    }

    if (0 == ret) {
    import_log_notice(job, "Sweep done.");
    } else {
    if (ENOSPC == ret) {
        import_log_notice(job, "ERROR: NO DISK SPACE LEFT in sweep phase");
    } else {
        import_log_notice(job, "ERROR: Sweep phase error %d (%s)", ret,
                  dblayer_strerror(ret));
    }
    }
    
    return ret;
}

/* when the import is done, this function is called to bring stuff back up.
 * returns 0 on success; anything else is an error
 */
static int import_all_done(ImportJob *job, int ret)
{
    ldbm_instance *inst = job->inst;

    /* Writing this file indicates to future server startups that
     * the db is OK */
    if (ret == 0) {
        char inst_dir[MAXPATHLEN*2];
        char *inst_dirp = NULL;
        inst_dirp = dblayer_get_full_inst_dir(inst->inst_li, inst,
                                              inst_dir, MAXPATHLEN*2);
        ret = dbversion_write(inst->inst_li, inst_dirp, NULL);
        if (inst_dirp != inst_dir)
            slapi_ch_free_string(&inst_dirp);
    }

    if (job->task != NULL && 0 == job->task->task_refcount) {
        /* exit code */
        job->task->task_exitcode = ret;
        job->task->task_state = SLAPI_TASK_FINISHED;
        job->task->task_progress = job->task->task_work;
        job->task->task_private = NULL;
        slapi_task_status_changed(job->task);
    }

    if (job->flags & FLAG_ONLINE) {
        /* make sure the indexes are online as well */
        /* richm 20070919 - if index entries are added online, they
           are created and marked as INDEX_OFFLINE, in anticipation
           of someone doing a db2index.  In this case, the db2index
           code will correctly unset the INDEX_OFFLINE flag.
           However, if import is used to create the indexes, the
           INDEX_OFFLINE flag will not be cleared.  So, we do that
           here
        */
        IndexInfo *index = job->index_list;
        while (index != NULL) {
            index->ai->ai_indexmask &= ~INDEX_OFFLINE;
            index = index->next;
        }
        /* start up the instance */
        ret = dblayer_instance_start(job->inst->inst_be, DBLAYER_NORMAL_MODE);
        if (ret != 0)
            return ret;

        /* bring backend online again */
        slapi_mtn_be_enable(inst->inst_be);
    }

    return ret;
}


int import_main_offline(void *arg)
{
    ImportJob *job = (ImportJob *)arg;
    ldbm_instance *inst = job->inst;
    backend *be = inst->inst_be;
    int ret = 0;
    time_t beginning = 0;
    time_t end = 0;
    int finished = 0;
    int status = 0;
    int verbose = 1;
    ImportWorkerInfo *producer = NULL;

    if (job->task)
        job->task->task_refcount++;

    PR_ASSERT(inst != NULL);
    time(&beginning);

    /* Decide which indexes are needed */
    if (job->flags & FLAG_INDEX_ATTRS) {
        /* Here, we get an AVL tree which contains nodes for all attributes
         * in the schema.  Given this tree, we need to identify those nodes
         * which are marked for indexing. */
        avl_apply(job->inst->inst_attrs, (IFP)import_attr_callback,
                  (caddr_t)job, -1, AVL_INORDER);
        vlv_getindices((IFP)import_attr_callback, (void *)job, be);
    }

    /* Determine how much index buffering space to allocate to each index */
    import_set_index_buffer_size(job);

    /* initialize the entry FIFO */
    ret = import_fifo_init(job);
    if (ret) {
        if (! (job->flags & FLAG_USE_FILES)) {
            PR_Lock(job->wire_lock);
            PR_NotifyCondVar(job->wire_cv);
            PR_Unlock(job->wire_lock);
        }
        goto error;
    }

    if (job->flags & FLAG_USE_FILES) {
        /* importing from files: start up a producer thread to read the
         * files and queue them
         */
        producer = CALLOC(ImportWorkerInfo);
        if (! producer)
            goto error;
        
        /* start the producer */
        import_init_worker_info(producer, job);
        producer->work_type = PRODUCER;
        if (job->flags & FLAG_REINDEXING)
        {
            if (! CREATE_THREAD(PR_USER_THREAD, (VFP)index_producer, producer,
                PR_PRIORITY_NORMAL, PR_GLOBAL_BOUND_THREAD,
                PR_UNJOINABLE_THREAD,
                SLAPD_DEFAULT_THREAD_STACKSIZE)) {
                PRErrorCode prerr = PR_GetError();
                LDAPDebug(LDAP_DEBUG_ANY,
                    "unable to spawn index producer thread, "
                    SLAPI_COMPONENT_NAME_NSPR " error %d (%s)\n",
                    prerr, slapd_pr_strerror(prerr), 0);
                goto error;
            }
        }
        else
        {
            import_log_notice(job, "Beginning import job...");
            if (! CREATE_THREAD(PR_USER_THREAD, (VFP)import_producer, producer,
                            PR_PRIORITY_NORMAL, PR_GLOBAL_BOUND_THREAD,
                            PR_UNJOINABLE_THREAD,
                            SLAPD_DEFAULT_THREAD_STACKSIZE)) {
                        PRErrorCode prerr = PR_GetError();
                LDAPDebug(LDAP_DEBUG_ANY,
                        "unable to spawn import producer thread, "
                        SLAPI_COMPONENT_NAME_NSPR " error %d (%s)\n",
                        prerr, slapd_pr_strerror(prerr), 0);
                goto error;
            }
        }

        if (0 == job->job_index_buffer_suggestion)
                import_log_notice(job, "Index buffering is disabled.");
        else
                import_log_notice(job,
                                "Index buffering enabled with bucket size %lu", 
                                job->job_index_buffer_suggestion);

        job->worker_list = producer;
    } else {
        /* release the startup lock and let the entries start queueing up
         * in for import */
        PR_Lock(job->wire_lock);
        PR_NotifyCondVar(job->wire_cv);
        PR_Unlock(job->wire_lock);
    }

    /* Run as many passes as we need to complete the job or die honourably in
     * the attempt */
    while (! finished) {
        job->current_pass++;
        job->total_pass++;
        ret = import_run_pass(job, &status);
        /* The following could have happened: 
         *     (a) Some error happened such that we're hosed.
         *         This is indicated by a non-zero return code.
         *     (b) We finished the complete file without needing a second pass
         *         This is indicated by a zero return code and a status of 
         *         IMPORT_COMPLETE_PASS and current_pass == 1;
         *     (c) We completed a pass and need at least another one
         *         This is indicated by a zero return code and a status of
         *         IMPORT_INCOMPLETE_PASS
         *     (d) We just completed what turned out to be the last in a
         *         series of passes
         *         This is indicated by a zero return code and a status of
         *         IMPORT_COMPLETE_PASS and current_pass > 1
         */
        if (ret == ERR_IMPORT_ABORTED) {
            /* at least one of the threads has aborted -- shut down ALL
             * of the threads */
            import_log_notice(job, "Aborting all import threads...");
            /* this abort sets the  abort flag on the threads and will block for 
             * the exit of all threads 
             */
            import_set_abort_flag_all(job, 1); 
            import_log_notice(job, "Import threads aborted.");
            goto error;
        }

        if (0 != ret) {
            /* Some horrible fate has befallen the import */
            import_log_notice(job, "Fatal pass error %d", ret);
            goto error;
        }

        /* No error, but a number of possibilities */
        if ( IMPORT_COMPLETE_PASS == status ) {
            if (1 == job->current_pass) {
                /* We're done !!!! */ ;
            } else {
                /* Save the files, then merge */
                ret = import_sweep_after_pass(job);
                if (0 != ret) {
                    goto error;
                }
                ret = import_mega_merge(job);
                if (0 != ret) {
                    goto error;
                }
            }
            finished = 1;
        } else {
            if (IMPORT_INCOMPLETE_PASS == status) {
                /* Need to go round again */
                /* Time to save the files we've built for later */
                ret = import_sweep_after_pass(job);
                if (0 != ret) {
                    goto error;
                }
                if ( (inst->inst_li->li_maxpassbeforemerge != 0) &&
                        (job->current_pass > inst->inst_li->li_maxpassbeforemerge) )
                {
                        ret = import_mega_merge(job);
                        if (0 != ret) {
                                   goto error;
                        }
                        job->current_pass = 1;
                        ret = import_sweep_after_pass(job);
                        if (0 != ret) {
                                   goto error;
                        }
                }

                /* Fixup the first_ID value to reflect previous work */
                job->first_ID = job->ready_ID + 1;
                import_free_thread_data(job);
                job->worker_list = producer;
                import_log_notice(job, "Beginning pass number %d",
                                  job->total_pass+1);
            } else {
                /* Bizarro-slapd */
                goto error;
            }
        }
    }

    /* kill the producer now; we're done */
    if (producer) {
        import_log_notice(job, "Cleaning up producer thread...");
        producer->command = STOP;
        /* wait for the lead thread to stop */
        while (producer->state != FINISHED) {
            DS_Sleep(PR_MillisecondsToInterval(100));
        }
    }

    /* Now do the numsubordinates attribute */
    import_log_notice(job, "Indexing complete.  Post-processing...");
    /* [610066] reindexed db cannot be used in the following backup/restore */
    if ( !(job->flags & FLAG_REINDEXING) &&
            (ret = update_subordinatecounts(be, job->mothers, NULL)) != 0) {
        import_log_notice(job, "Failed to update numsubordinates attributes");
        goto error;
    }

    /* And the ancestorid index */
    if ((ret = ldbm_ancestorid_create_index(be)) != 0) {
        import_log_notice(job, "Failed to create ancestorid index");
        goto error;
    }

    import_log_notice(job, "Flushing caches...");
    if (0 != (ret = dblayer_flush(job->inst->inst_li)) ) {
        import_log_notice(job, "Failed to flush database");
        goto error;
    }

    /* New way to exit the routine: check the return code.
     * If it's non-zero, delete the database files. 
     * Otherwise don't, but always close the database layer properly.
     * Then return. This ensures that we can't make a half-good/half-bad
     * Database. */
        
error:
    /* If we fail, the database is now in a mess, so we delete it */
    import_log_notice(job, "Closing files...");
    cache_clear(&job->inst->inst_cache);
    if (0 != ret) {
        dblayer_delete_instance_dir(be);
        dblayer_instance_close(job->inst->inst_be);
    } else {
        if (0 != (ret = dblayer_instance_close(job->inst->inst_be)) ) {
            import_log_notice(job, "Failed to close database");
        }
    }
    if (!(job->flags & FLAG_ONLINE))
        dblayer_close(job->inst->inst_li, DBLAYER_IMPORT_MODE);
    
    time(&end);
    if (verbose && (0 == ret)) {
        int seconds_to_import = end - beginning;
        size_t entries_processed = job->lead_ID - (job->starting_ID - 1);
        double entries_per_second = (double) entries_processed / 
            (double) seconds_to_import;

        if (job->not_here_skipped)
        {
                if (job->skipped)
                        import_log_notice(job, "Import complete.  Processed %lu entries "
                              "(%d bad entries were skipped, "
                              "%d entries were skipped because they don't "
                                                          "belong to this database) in %d seconds. "
                              "(%.2f entries/sec)", entries_processed,
                              job->skipped, job->not_here_skipped,
                                                          seconds_to_import, entries_per_second);
                else
                        import_log_notice(job, "Import complete.  Processed %lu entries "
                              "(%d entries were skipped because they don't "
                                                          "belong to this database) "
                              "in %d seconds. (%.2f entries/sec)",
                              entries_processed, job->not_here_skipped,
                                                          seconds_to_import, entries_per_second);
        }
        else
        {
                if (job->skipped)
                        import_log_notice(job, "Import complete.  Processed %lu entries "
                              "(%d were skipped) in %d seconds. "
                              "(%.2f entries/sec)", entries_processed,
                              job->skipped, seconds_to_import,
                              entries_per_second);
                else
                        import_log_notice(job, "Import complete.  Processed %lu entries "
                              "in %d seconds. (%.2f entries/sec)",
                              entries_processed, seconds_to_import,
                              entries_per_second);
        }
    }

    if (0 != ret) {
        import_log_notice(job, "Import failed.");
        if (job->task != NULL) {
            job->task->task_state = SLAPI_TASK_FINISHED;
            job->task->task_exitcode = ret;
            slapi_task_status_changed(job->task);
        }
    } else {
        if (job->task)
            job->task->task_refcount--;

        import_all_done(job, ret);
    }

    /* This instance isn't busy anymore */
    instance_set_not_busy(job->inst);
    
    import_free_job(job);
    if (producer)
        FREE(producer);

    
    return(ret);
}

/*
 * to be called by online import using PR_CreateThread()
 * offline import directly calls import_main_offline()
 *
 */
void import_main(void *arg)
{
    import_main_offline(arg);
}

int ldbm_back_ldif2ldbm_deluxe(Slapi_PBlock *pb)
{
    backend *be = NULL;
    int noattrindexes = 0;
    ImportJob *job = NULL;
    char **name_array = NULL;
    int total_files, i;
    PRThread *thread = NULL;

    job = CALLOC(ImportJob);
    if (job == NULL) {
        LDAPDebug(LDAP_DEBUG_ANY, "not enough memory to do import job\n",
                  0, 0, 0);
        return -1;
    }

    slapi_pblock_get( pb, SLAPI_BACKEND, &be);
    PR_ASSERT(NULL != be);
    job->inst = (ldbm_instance *)be->be_instance_info;
    slapi_pblock_get( pb, SLAPI_LDIF2DB_NOATTRINDEXES, &noattrindexes );
    slapi_pblock_get( pb, SLAPI_LDIF2DB_FILE, &name_array );

    /* the removedupvals field is blatantly overloaded here to mean
     * the chunk size too.  (chunk size = number of entries that should
     * be imported before starting a new pass.  usually for debugging.)
     */
    slapi_pblock_get(pb, SLAPI_LDIF2DB_REMOVEDUPVALS, &job->merge_chunk_size);
    if (job->merge_chunk_size == 1)
        job->merge_chunk_size = 0;
    /* get list of specifically included and/or excluded subtrees from
     * the front-end */
    ldbm_back_fetch_incl_excl(pb, &job->include_subtrees,
                  &job->exclude_subtrees);
    /* get cn=tasks info, if any */
    slapi_pblock_get(pb, SLAPI_BACKEND_TASK, &job->task);
    slapi_pblock_get(pb, SLAPI_LDIF2DB_ENCRYPT, &job->encrypt);
    /* get uniqueid info */
    slapi_pblock_get(pb, SLAPI_LDIF2DB_GENERATE_UNIQUEID, &job->uuid_gen_type);
    if (job->uuid_gen_type == SLAPI_UNIQUEID_GENERATE_NAME_BASED) {
        char *namespaceid;

        slapi_pblock_get(pb, SLAPI_LDIF2DB_NAMESPACEID, &namespaceid);
        job->uuid_namespace = slapi_ch_strdup(namespaceid);
    }

    job->flags = FLAG_USE_FILES;
    if (NULL == name_array)    /* no ldif file is given -> reindexing */
        job->flags |= FLAG_REINDEXING;
    if (!noattrindexes)
    job->flags |= FLAG_INDEX_ATTRS;
    for (i = 0; name_array && name_array[i] != NULL; i++)
        charray_add(&job->input_filenames, slapi_ch_strdup(name_array[i]));
    job->starting_ID = 1;
    job->first_ID = 1;
    job->mothers = CALLOC(import_subcount_stuff);

    /* how much space should we allocate to index buffering? */
    job->job_index_buffer_size = import_get_index_buffer_size();
    if (job->job_index_buffer_size == 0) {
    /* 10% of the allocated cache size + one meg */
        PR_Lock(job->inst->inst_li->li_config_mutex);
    job->job_index_buffer_size = (job->inst->inst_li->li_import_cachesize/10) +
            (1024*1024);
        PR_Unlock(job->inst->inst_li->li_config_mutex);
    }
    import_subcount_stuff_init(job->mothers);

    if (job->task != NULL) {
        /* count files, use that to track "progress" in cn=tasks */
        total_files = 0;
        while (name_array && name_array[total_files] != NULL)
            total_files++;
        /* add 1 to account for post-import cleanup (which can take a
         * significant amount of time)
         */
    if (0 == total_files)    /* reindexing */
            job->task->task_work = 2;
    else
            job->task->task_work = total_files + 1;
        job->task->task_progress = 0;
        job->task->task_state = SLAPI_TASK_RUNNING;
        job->task->task_private = job;
        job->task->destructor = import_task_destroy;
        job->task->cancel = import_task_abort;
        job->flags |= FLAG_ONLINE;

        /* create thread for import_main, so we can return */
        thread = PR_CreateThread(PR_USER_THREAD, import_main, (void *)job,
                                 PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD,
                                 PR_UNJOINABLE_THREAD,
                                 SLAPD_DEFAULT_THREAD_STACKSIZE);
        if (thread == NULL) {
            PRErrorCode prerr = PR_GetError();
            LDAPDebug(LDAP_DEBUG_ANY, "unable to spawn import thread, "
                        SLAPI_COMPONENT_NAME_NSPR " error %d (%s)\n",
                        prerr, slapd_pr_strerror(prerr), 0);
            import_free_job(job);
            FREE(job);
            return -2;
        }
        return 0;
    }

    /* old style -- do it all synchronously (THIS IS GOING AWAY SOON) */
    return import_main_offline((void *)job);
}