summaryrefslogtreecommitdiffstats
path: root/sql/rpl_mi.cc
blob: 4fc204dddd36a33dc1db0d8684c88cde3abb9deb (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
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
/* Copyright (c) 2006, 2017, Oracle and/or its affiliates.
   Copyright (c) 2010, 2022, MariaDB Corporation.

   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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */

#include "mariadb.h" // For HAVE_REPLICATION
#include "sql_priv.h"
#include <my_dir.h>
#include "rpl_mi.h"
#include "slave.h"
#include "strfunc.h"
#include "sql_repl.h"

#ifdef HAVE_REPLICATION

#define DEFAULT_CONNECT_RETRY 60

static void init_master_log_pos(Master_info* mi);

Master_info::Master_info(LEX_CSTRING *connection_name_arg,
                         bool is_slave_recovery)
  :Slave_reporting_capability("I/O"),
   ssl(0), ssl_verify_server_cert(1), fd(-1), io_thd(0), 
   rli(is_slave_recovery), port(MYSQL_PORT),
   checksum_alg_before_fd(BINLOG_CHECKSUM_ALG_UNDEF),
   connect_retry(DEFAULT_CONNECT_RETRY), inited(0), abort_slave(0),
   slave_running(MYSQL_SLAVE_NOT_RUN), slave_run_id(0),
   clock_diff_with_master(0),
   sync_counter(0), heartbeat_period(0), received_heartbeats(0),
   master_id(0), prev_master_id(0),
   using_gtid(USE_GTID_SLAVE_POS), events_queued_since_last_gtid(0),
   gtid_reconnect_event_skip_count(0), gtid_event_seen(false),
   in_start_all_slaves(0), in_stop_all_slaves(0), in_flush_all_relay_logs(0),
   users(0), killed(0),
   total_ddl_groups(0), total_non_trans_groups(0), total_trans_groups(0),
   semi_sync_reply_enabled(0)
{
  char *tmp;
  host[0] = 0; user[0] = 0; password[0] = 0;
  ssl_ca[0]= 0; ssl_capath[0]= 0; ssl_cert[0]= 0;
  ssl_cipher[0]= 0; ssl_key[0]= 0;
  ssl_crl[0]= 0; ssl_crlpath[0]= 0;

  /*
    Store connection name and lower case connection name
    It's safe to ignore any OMM errors as this is checked by error()
  */
  connection_name.length= cmp_connection_name.length=
    connection_name_arg->length;
  if ((connection_name.str= tmp= (char*)
       my_malloc(PSI_INSTRUMENT_ME, connection_name_arg->length*2+2, MYF(MY_WME))))
  {
    strmake(tmp, connection_name_arg->str, connection_name.length);
    tmp+= connection_name_arg->length+1;
    cmp_connection_name.str= tmp;
    memcpy(tmp, connection_name_arg->str, connection_name.length+1);
    my_casedn_str(system_charset_info, tmp);
  }
  /*
    When MySQL restarted, all Rpl_filter settings which aren't in the my.cnf
    will be lost. If you want to lose a setting after restart, you
    should add them into my.cnf
  */
  rpl_filter= get_or_create_rpl_filter(connection_name.str, 
                                       connection_name.length);
  copy_filter_setting(rpl_filter, global_rpl_filter);

  parallel_mode= rpl_filter->get_parallel_mode();

  my_init_dynamic_array(PSI_INSTRUMENT_ME, &ignore_server_ids,
                        sizeof(global_system_variables.server_id), 16, 16,
                        MYF(0));
  bzero((char*) &file, sizeof(file));
  mysql_mutex_init(key_master_info_run_lock, &run_lock, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_master_info_data_lock, &data_lock, MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_master_info_start_stop_lock, &start_stop_lock,
                   MY_MUTEX_INIT_SLOW);
  /*
    start_alter_lock will protect individual start_alter_info while
    start_alter_list_lock is for list insertion and deletion operations
  */
  mysql_mutex_init(key_master_info_start_alter_lock, &start_alter_lock,
                                      MY_MUTEX_INIT_FAST);
  mysql_mutex_init(key_master_info_start_alter_list_lock, &start_alter_list_lock,
                                      MY_MUTEX_INIT_FAST);
  mysql_mutex_setflags(&run_lock, MYF_NO_DEADLOCK_DETECTION);
  mysql_mutex_setflags(&data_lock, MYF_NO_DEADLOCK_DETECTION);
  mysql_mutex_init(key_master_info_sleep_lock, &sleep_lock, MY_MUTEX_INIT_FAST);
  mysql_cond_init(key_master_info_data_cond, &data_cond, NULL);
  mysql_cond_init(key_master_info_start_cond, &start_cond, NULL);
  mysql_cond_init(key_master_info_stop_cond, &stop_cond, NULL);
  mysql_cond_init(key_master_info_sleep_cond, &sleep_cond, NULL);
  init_sql_alloc(PSI_INSTRUMENT_ME, &mem_root, MEM_ROOT_BLOCK_SIZE, 0, MYF(0));
}


/**
   Wait until no one is using Master_info
*/

void Master_info::wait_until_free()
{
  mysql_mutex_lock(&sleep_lock);
  killed= 1;
  while (users)
    mysql_cond_wait(&sleep_cond, &sleep_lock);
  mysql_mutex_unlock(&sleep_lock);
}

/**
   Delete master_info
*/

Master_info::~Master_info()
{
  wait_until_free();
  my_free(const_cast<char*>(connection_name.str));
  delete_dynamic(&ignore_server_ids);
  mysql_mutex_destroy(&run_lock);
  mysql_mutex_destroy(&data_lock);
  mysql_mutex_destroy(&sleep_lock);
  mysql_mutex_destroy(&start_stop_lock);
  mysql_mutex_destroy(&start_alter_lock);
  mysql_mutex_destroy(&start_alter_list_lock);
  mysql_cond_destroy(&data_cond);
  mysql_cond_destroy(&start_cond);
  mysql_cond_destroy(&stop_cond);
  mysql_cond_destroy(&sleep_cond);
  free_root(&mem_root, MYF(0));
}

/**
   A comparison function to be supplied as argument to @c sort_dynamic()
   and @c bsearch()

   @return -1 if first argument is less, 0 if it equal to, 1 if it is greater
   than the second
*/
static int change_master_id_cmp(const void *id1, const void *id2)
{
  return (*(ulong *) id1 - *(ulong *) id2);
}

/**
   Reports if the s_id server has been configured to ignore events 
   it generates with

      CHANGE MASTER IGNORE_SERVER_IDS= ( list of server ids )

   Method is called from the io thread event receiver filtering.

   @param      s_id    the master server identifier

   @retval   TRUE    if s_id is in the list of ignored master  servers,
   @retval   FALSE   otherwise.
 */
bool Master_info::shall_ignore_server_id(ulong s_id)
{
  if (likely(ignore_server_ids.elements == 1))
    return (* (ulong*) dynamic_array_ptr(&ignore_server_ids, 0)) == s_id;
  else
    return bsearch((const ulong *) &s_id,
                   ignore_server_ids.buffer,
                   ignore_server_ids.elements, sizeof(ulong),
                   change_master_id_cmp) != NULL;
}

void Master_info::clear_in_memory_info(bool all)
{
  init_master_log_pos(this);
  if (all)
  {
    port= MYSQL_PORT;
    host[0] = 0; user[0] = 0; password[0] = 0;
    domain_id_filter.clear_ids();
    reset_dynamic(&ignore_server_ids);
  }
}


const char *
Master_info::using_gtid_astext(enum enum_using_gtid arg)
{
  switch (arg)
  {
  case USE_GTID_NO:
    return "No";
  case USE_GTID_SLAVE_POS:
    return "Slave_Pos";
  default:
    DBUG_ASSERT(arg == USE_GTID_CURRENT_POS);
    return "Current_Pos";
  }
}


void init_master_log_pos(Master_info* mi)
{
  DBUG_ENTER("init_master_log_pos");

  mi->master_log_name[0] = 0;
  mi->master_log_pos = BIN_LOG_HEADER_SIZE;             // skip magic number
  if (mi->master_supports_gtid)
  {
    mi->using_gtid= Master_info::USE_GTID_SLAVE_POS;
  }
  mi->gtid_current_pos.reset();
  mi->events_queued_since_last_gtid= 0;
  mi->gtid_reconnect_event_skip_count= 0;
  mi->gtid_event_seen= false;

  /* Intentionally init ssl_verify_server_cert to 0, no option available  */
  mi->ssl_verify_server_cert= 0;
  /* 
    always request heartbeat unless master_heartbeat_period is set
    explicitly zero.  Here is the default value for heartbeat period
    if CHANGE MASTER did not specify it.  (no data loss in conversion
    as hb period has a max)
  */
  mi->heartbeat_period= (float) MY_MIN(SLAVE_MAX_HEARTBEAT_PERIOD,
                                    (slave_net_timeout/2.0));
  DBUG_ASSERT(mi->heartbeat_period > (float) 0.001
              || mi->heartbeat_period == 0);

  DBUG_VOID_RETURN;
}

/**
  Parses the IO_CACHE for "key=" and returns the "key".
  If no '=' found, returns the whole line (for END_MARKER).

  @param key      [OUT]               Key buffer
  @param max_size [IN]                Maximum buffer size
  @param f        [IN]                IO_CACHE file
  @param found_equal [OUT]            Set true if a '=' was found.

  @retval 0                           Either "key=" or '\n' found
  @retval 1                           EOF
*/
static int
read_mi_key_from_file(char *key, int max_size, IO_CACHE *f, bool *found_equal)
{
  int i= 0, c;

  DBUG_ENTER("read_key_from_file");

  *found_equal= false;
  if (max_size <= 0)
    DBUG_RETURN(1);
  for (;;)
  {
    if (i >= max_size-1)
    {
      key[i] = '\0';
      DBUG_RETURN(0);
    }
    c= my_b_get(f);
    if (c == my_b_EOF)
    {
      DBUG_RETURN(1);
    }
    else if (c == '\n')
    {
      key[i]= '\0';
      DBUG_RETURN(0);
    }
    else if (c == '=')
    {
      key[i]= '\0';
      *found_equal= true;
      DBUG_RETURN(0);
    }
    else
    {
      key[i]= c;
      ++i;
    }
  }
  /* NotReached */
}

enum {
  LINES_IN_MASTER_INFO_WITH_SSL= 14,

  /* 5.1.16 added value of master_ssl_verify_server_cert */
  LINE_FOR_MASTER_SSL_VERIFY_SERVER_CERT= 15,

  /* 5.5 added value of master_heartbeat_period */
  LINE_FOR_MASTER_HEARTBEAT_PERIOD= 16,

  /* MySQL Cluster 6.3 added master_bind */
  LINE_FOR_MASTER_BIND = 17,

  /* 6.0 added value of master_ignore_server_id */
  LINE_FOR_REPLICATE_IGNORE_SERVER_IDS= 18,

  /* 6.0 added value of master_uuid */
  LINE_FOR_MASTER_UUID= 19,

  /* line for master_retry_count */
  LINE_FOR_MASTER_RETRY_COUNT= 20,

  /* line for ssl_crl */
  LINE_FOR_SSL_CRL= 21,

  /* line for ssl_crl */
  LINE_FOR_SSL_CRLPATH= 22,

  /* MySQL 5.6 fixed-position lines. */
  LINE_FOR_FIRST_MYSQL_5_6=23,
  LINE_FOR_LAST_MYSQL_5_6=23,
  /* Reserved lines for MySQL future versions. */
  LINE_FOR_LAST_MYSQL_FUTURE=33,
  /* Number of (fixed-position) lines used when saving master info file */
  LINES_IN_MASTER_INFO= LINE_FOR_LAST_MYSQL_FUTURE
};

int init_master_info(Master_info* mi, const char* master_info_fname,
                     const char* slave_info_fname,
                     bool abort_if_no_master_info_file,
                     int thread_mask)
{
  int fd,error;
  char fname[FN_REFLEN+128];
  DBUG_ENTER("init_master_info");

  if (mi->inited)
  {
    /*
      We have to reset read position of relay-log-bin as we may have
      already been reading from 'hotlog' when the slave was stopped
      last time. If this case pos_in_file would be set and we would
      get a crash when trying to read the signature for the binary
      relay log.

      We only rewind the read position if we are starting the SQL
      thread. The handle_slave_sql thread assumes that the read
      position is at the beginning of the file, and will read the
      "signature" and then fast-forward to the last position read.
    */
    if (thread_mask & SLAVE_SQL)
    {
      bool hot_log= FALSE;
      /* 
         my_b_seek does an implicit flush_io_cache, so we need to:

         1. check if this log is active (hot)
         2. if it is we keep log_lock until the seek ends, otherwise 
            release it right away.

         If we did not take log_lock, SQL thread might race with IO
         thread for the IO_CACHE mutex.

       */
      mysql_mutex_t *log_lock= mi->rli.relay_log.get_log_lock();
      mysql_mutex_lock(log_lock);
      hot_log= mi->rli.relay_log.is_active(mi->rli.linfo.log_file_name);

      if (!hot_log)
        mysql_mutex_unlock(log_lock);

      my_b_seek(mi->rli.cur_log, (my_off_t) 0);

      if (hot_log)
        mysql_mutex_unlock(log_lock);
    }
    DBUG_RETURN(0);
  }

  mi->mysql=0;
  mi->file_id=1;
  fn_format(fname, master_info_fname, mysql_data_home, "", 4+32);

  /*
    We need a mutex while we are changing master info parameters to
    keep other threads from reading bogus info
  */

  mysql_mutex_lock(&mi->data_lock);
  fd = mi->fd;

  /* does master.info exist ? */

  if (access(fname,F_OK))
  {
    if (abort_if_no_master_info_file)
    {
      mysql_mutex_unlock(&mi->data_lock);
      DBUG_RETURN(0);
    }
    /*
      if someone removed the file from underneath our feet, just close
      the old descriptor and re-create the old file
    */
    if (fd >= 0)
      mysql_file_close(fd, MYF(MY_WME));
    if ((fd= mysql_file_open(key_file_master_info,
                             fname, O_CREAT|O_RDWR|O_BINARY, MYF(MY_WME))) < 0 )
    {
      sql_print_error("Failed to create a new master info file (\
file '%s', errno %d)", fname, my_errno);
      goto err;
    }
    if (init_io_cache(&mi->file, fd, IO_SIZE*2, READ_CACHE, 0L,0,
                      MYF(MY_WME)))
    {
      sql_print_error("Failed to create a cache on master info file (\
file '%s')", fname);
      goto err;
    }

    mi->fd = fd;
    mi->clear_in_memory_info(false);

  }
  else // file exists
  {
    if (fd >= 0)
      reinit_io_cache(&mi->file, READ_CACHE, 0L,0,0);
    else
    {
      if ((fd= mysql_file_open(key_file_master_info,
                               fname, O_RDWR|O_BINARY, MYF(MY_WME))) < 0 )
      {
        sql_print_error("Failed to open the existing master info file (\
file '%s', errno %d)", fname, my_errno);
        goto err;
      }
      if (init_io_cache(&mi->file, fd, IO_SIZE*2, READ_CACHE, 0L,
                        0, MYF(MY_WME)))
      {
        sql_print_error("Failed to create a cache on master info file (\
file '%s')", fname);
        goto err;
      }
    }

    mi->fd = fd;
    int port, connect_retry, master_log_pos, lines;
    int ssl= 0, ssl_verify_server_cert= 0;
    float master_heartbeat_period= 0.0;
    char *first_non_digit;
    char buf[HOSTNAME_LENGTH+1];

    /*
       Starting from 4.1.x master.info has new format. Now its
       first line contains number of lines in file. By reading this
       number we will be always distinguish to which version our
       master.info corresponds to. We can't simply count lines in
       file since versions before 4.1.x could generate files with more
       lines than needed.
       If first line doesn't contain a number or contain number less than
       LINES_IN_MASTER_INFO_WITH_SSL then such file is treated like file
       from pre 4.1.1 version.
       There is no ambiguity when reading an old master.info, as before
       4.1.1, the first line contained the binlog's name, which is either
       empty or has an extension (contains a '.'), so can't be confused
       with an integer.

       So we're just reading first line and trying to figure which version
       is this.
    */

    /*
       The first row is temporarily stored in mi->master_log_name,
       if it is line count and not binlog name (new format) it will be
       overwritten by the second row later.
    */
    if (init_strvar_from_file(mi->master_log_name,
                              sizeof(mi->master_log_name), &mi->file,
                              ""))
      goto errwithmsg;

    lines= strtoul(mi->master_log_name, &first_non_digit, 10);

    if (mi->master_log_name[0]!='\0' &&
        *first_non_digit=='\0' && lines >= LINES_IN_MASTER_INFO_WITH_SSL)
    {
      /* Seems to be new format => read master log name from next line */
      if (init_strvar_from_file(mi->master_log_name,
            sizeof(mi->master_log_name), &mi->file, ""))
        goto errwithmsg;
    }
    else
      lines= 7;

    if (init_intvar_from_file(&master_log_pos, &mi->file, 4) ||
        init_strvar_from_file(mi->host, sizeof(mi->host), &mi->file, 0) ||
        init_strvar_from_file(mi->user, sizeof(mi->user), &mi->file, "test") ||
        init_strvar_from_file(mi->password, SCRAMBLED_PASSWORD_CHAR_LENGTH+1,
                              &mi->file, 0) ||
        init_intvar_from_file(&port, &mi->file, MYSQL_PORT) ||
        init_intvar_from_file(&connect_retry, &mi->file,
                              DEFAULT_CONNECT_RETRY))
      goto errwithmsg;

    /*
       If file has ssl part use it even if we have server without
       SSL support. But these options will be ignored later when
       slave will try connect to master, so in this case warning
       is printed.
     */
    if (lines >= LINES_IN_MASTER_INFO_WITH_SSL)
    {
      if (init_intvar_from_file(&ssl, &mi->file, 0) ||
          init_strvar_from_file(mi->ssl_ca, sizeof(mi->ssl_ca),
                                &mi->file, 0) ||
          init_strvar_from_file(mi->ssl_capath, sizeof(mi->ssl_capath),
                                &mi->file, 0) ||
          init_strvar_from_file(mi->ssl_cert, sizeof(mi->ssl_cert),
                                &mi->file, 0) ||
          init_strvar_from_file(mi->ssl_cipher, sizeof(mi->ssl_cipher),
                                &mi->file, 0) ||
          init_strvar_from_file(mi->ssl_key, sizeof(mi->ssl_key),
                                &mi->file, 0))
        goto errwithmsg;

      /*
        Starting from 5.1.16 ssl_verify_server_cert might be
        in the file
      */
      if (lines >= LINE_FOR_MASTER_SSL_VERIFY_SERVER_CERT &&
          init_intvar_from_file(&ssl_verify_server_cert, &mi->file, 0))
        goto errwithmsg;
      /*
        Starting from 6.0 master_heartbeat_period might be
        in the file
      */
      if (lines >= LINE_FOR_MASTER_HEARTBEAT_PERIOD &&
          init_floatvar_from_file(&master_heartbeat_period, &mi->file, 0.0))
        goto errwithmsg;
      /*
	Starting from MySQL Cluster 6.3 master_bind might be in the file
	(this is just a reservation to avoid future upgrade problems) 
       */
      if (lines >= LINE_FOR_MASTER_BIND &&
	  init_strvar_from_file(buf, sizeof(buf), &mi->file, ""))
	  goto errwithmsg;
      /*
        Starting from 6.0 list of server_id of ignorable servers might be
        in the file
      */
      if (lines >= LINE_FOR_REPLICATE_IGNORE_SERVER_IDS &&
          init_dynarray_intvar_from_file(&mi->ignore_server_ids, &mi->file))
      {
        sql_print_error("Failed to initialize master info ignore_server_ids");
        goto errwithmsg;
      }

      /* reserved */
      if (lines >= LINE_FOR_MASTER_UUID &&
	  init_strvar_from_file(buf, sizeof(buf), &mi->file, ""))
	  goto errwithmsg;

      /* Starting from 5.5 the master_retry_count may be in the repository. */
      if (lines >= LINE_FOR_MASTER_RETRY_COUNT &&
	  init_strvar_from_file(buf, sizeof(buf), &mi->file, ""))
	  goto errwithmsg;

      if (lines >= LINE_FOR_SSL_CRLPATH &&
	  (init_strvar_from_file(mi->ssl_crl, sizeof(mi->ssl_crl),
                                 &mi->file, "") ||
	   init_strvar_from_file(mi->ssl_crlpath, sizeof(mi->ssl_crlpath),
                                 &mi->file, "")))
	  goto errwithmsg;

      /*
        Starting with MariaDB 10.0, we use a key=value syntax, which is nicer
        in several ways. But we leave a bunch of empty lines to accomodate
        any future old-style additions in MySQL (this will make it easier for
        users moving from MariaDB to MySQL, to not have MySQL try to
        interpret a MariaDB key=value line.)
      */
      if (lines >= LINE_FOR_LAST_MYSQL_FUTURE)
      {
        uint i;
        bool got_eq;
        bool seen_using_gtid= false;
        bool seen_do_domain_ids=false, seen_ignore_domain_ids=false;

        /* Skip lines used by / reserved for MySQL >= 5.6. */
        for (i= LINE_FOR_FIRST_MYSQL_5_6; i <= LINE_FOR_LAST_MYSQL_FUTURE; ++i)
        {
          if (init_strvar_from_file(buf, sizeof(buf), &mi->file, ""))
          goto errwithmsg;
        }

        /*
          Parse any extra key=value lines. read_key_from_file() parses the file
          for "key=" and returns the "key" if found. The "value" can then the
          parsed on case by case basis. The "unknown" lines would be ignored to
          facilitate downgrades.
          10.0 does not have the END_MARKER before any left-overs at the end
          of the file. So ignore any but the first occurrence of a key.
        */
        while (!read_mi_key_from_file(buf, sizeof(buf), &mi->file, &got_eq))
        {
          if (got_eq && !seen_using_gtid && !strcmp(buf, "using_gtid"))
          {
            int val;
            if (!init_intvar_from_file(&val, &mi->file, 0))
            {
              if (val == Master_info::USE_GTID_CURRENT_POS)
                mi->using_gtid= Master_info::USE_GTID_CURRENT_POS;
              else if (val == Master_info::USE_GTID_SLAVE_POS)
                mi->using_gtid= Master_info::USE_GTID_SLAVE_POS;
              else
                mi->using_gtid= Master_info::USE_GTID_NO;
              seen_using_gtid= true;
            } else {
              sql_print_error("Failed to initialize master info using_gtid");
              goto errwithmsg;
            }
          }
          else if (got_eq && !seen_do_domain_ids && !strcmp(buf, "do_domain_ids"))
          {
            if (mi->domain_id_filter.init_ids(&mi->file,
                                              Domain_id_filter::DO_DOMAIN_IDS))
            {
              sql_print_error("Failed to initialize master info do_domain_ids");
              goto errwithmsg;
            }
            seen_do_domain_ids= true;
          }
          else if (got_eq && !seen_ignore_domain_ids &&
                   !strcmp(buf, "ignore_domain_ids"))
          {
            if (mi->domain_id_filter.init_ids(&mi->file,
                                              Domain_id_filter::IGNORE_DOMAIN_IDS))
            {
              sql_print_error("Failed to initialize master info "
                              "ignore_domain_ids");
              goto errwithmsg;
            }
            seen_ignore_domain_ids= true;
          }
          else if (!got_eq && !strcmp(buf, "END_MARKER"))
          {
            /*
              Guard agaist extra left-overs at the end of file, in case a later
              update causes the file to shrink compared to earlier contents.
            */
            break;
          }
        }
      }
    }

#ifndef HAVE_OPENSSL
    if (ssl)
      sql_print_warning("SSL information in the master info file "
                      "('%s') are ignored because this MySQL slave was "
                      "compiled without SSL support.", fname);
#endif /* HAVE_OPENSSL */

    /*
      This has to be handled here as init_intvar_from_file can't handle
      my_off_t types
    */
    mi->master_log_pos= (my_off_t) master_log_pos;
    mi->port= (uint) port;
    mi->connect_retry= (uint) connect_retry;
    mi->ssl= (my_bool) ssl;
    mi->ssl_verify_server_cert= ssl_verify_server_cert;
    mi->heartbeat_period= MY_MIN(SLAVE_MAX_HEARTBEAT_PERIOD, master_heartbeat_period);
  }
  DBUG_PRINT("master_info",("log_file_name: %s  position: %ld",
                            mi->master_log_name,
                            (ulong) mi->master_log_pos));

  mi->rli.mi= mi;
  if (mi->rli.init(slave_info_fname))
    goto err;

  mi->inited = 1;
  mi->rli.is_relay_log_recovery= FALSE;
  // now change cache READ -> WRITE - must do this before flush_master_info
  reinit_io_cache(&mi->file, WRITE_CACHE, 0L, 0, 1);
  if (unlikely((error= MY_TEST(flush_master_info(mi, TRUE, TRUE)))))
    sql_print_error("Failed to flush master info file");
  mysql_mutex_unlock(&mi->data_lock);
  DBUG_RETURN(error);

errwithmsg:
  sql_print_error("Error reading master configuration");

err:
  if (fd >= 0)
  {
    mysql_file_close(fd, MYF(0));
    end_io_cache(&mi->file);
  }
  mi->fd= -1;
  mysql_mutex_unlock(&mi->data_lock);
  DBUG_RETURN(1);
}


/*
  RETURN
     2 - flush relay log failed
     1 - flush master info failed
     0 - all ok
*/
int flush_master_info(Master_info* mi, 
                      bool flush_relay_log_cache, 
                      bool need_lock_relay_log)
{
  IO_CACHE* file = &mi->file;
  char lbuf[22];
  int err= 0;

  DBUG_ENTER("flush_master_info");
  DBUG_PRINT("enter",("master_pos: %ld", (long) mi->master_log_pos));

  /*
    Flush the relay log to disk. If we don't do it, then the relay log while
    have some part (its last kilobytes) in memory only, so if the slave server
    dies now, with, say, from master's position 100 to 150 in memory only (not
    on disk), and with position 150 in master.info, then when the slave
    restarts, the I/O thread will fetch binlogs from 150, so in the relay log
    we will have "[0, 100] U [150, infinity[" and nobody will notice it, so the
    SQL thread will jump from 100 to 150, and replication will silently break.

    When we come to this place in code, relay log may or not be initialized;
    the caller is responsible for setting 'flush_relay_log_cache' accordingly.
  */
  if (flush_relay_log_cache)
  {
    mysql_mutex_t *log_lock= mi->rli.relay_log.get_log_lock();
    IO_CACHE *log_file= mi->rli.relay_log.get_log_file();

    if (need_lock_relay_log)
      mysql_mutex_lock(log_lock);

    mysql_mutex_assert_owner(log_lock);
    err= flush_io_cache(log_file);

    if (need_lock_relay_log)
      mysql_mutex_unlock(log_lock);

    if (err)
      DBUG_RETURN(2);
  }

  /*
    produce a line listing the total number and all the ignored server_id:s
  */
  char* ignore_server_ids_buf;
  {
    ignore_server_ids_buf=
      (char *) my_malloc(PSI_INSTRUMENT_ME,
                         (sizeof(global_system_variables.server_id) * 3 + 1) *
                         (1 + mi->ignore_server_ids.elements), MYF(MY_WME));
    if (!ignore_server_ids_buf)
      DBUG_RETURN(1);                           /* error */
    ulong cur_len= sprintf(ignore_server_ids_buf, "%zu",
                           mi->ignore_server_ids.elements);
    for (ulong i= 0; i < mi->ignore_server_ids.elements; i++)
    {
      ulong s_id;
      get_dynamic(&mi->ignore_server_ids, (uchar*) &s_id, i);
      cur_len+= sprintf(ignore_server_ids_buf + cur_len, " %lu", s_id);
    }
  }

  char *do_domain_ids_buf= 0, *ignore_domain_ids_buf= 0;

  do_domain_ids_buf=
    mi->domain_id_filter.as_string(Domain_id_filter::DO_DOMAIN_IDS);
  if (do_domain_ids_buf == NULL)
  {
    err= 1;                                     /* error */
    goto done;
  }

  ignore_domain_ids_buf=
    mi->domain_id_filter.as_string(Domain_id_filter::IGNORE_DOMAIN_IDS);
  if (ignore_domain_ids_buf == NULL)
  {
    err= 1;                                     /* error */
    goto done;
  }

  /*
    We flushed the relay log BEFORE the master.info file, because if we crash
    now, we will get a duplicate event in the relay log at restart. If we
    flushed in the other order, we would get a hole in the relay log.
    And duplicate is better than hole (with a duplicate, in later versions we
    can add detection and scrap one event; with a hole there's nothing we can
    do).
  */

  /*
     In certain cases this code may create master.info files that seems
     corrupted, because of extra lines filled with garbage in the end
     file (this happens if new contents take less space than previous
     contents of file). But because of number of lines in the first line
     of file we don't care about this garbage.
  */
  char heartbeat_buf[FLOATING_POINT_BUFFER];
  my_fcvt(mi->heartbeat_period, 3, heartbeat_buf, NULL);
  my_b_seek(file, 0L);
  my_b_printf(file,
              "%u\n%s\n%s\n%s\n%s\n%s\n%d\n%d\n%d\n%s\n%s\n%s\n%s\n%s\n%d\n%s\n%s\n%s\n%s\n%d\n%s\n%s\n"
              "\n\n\n\n\n\n\n\n\n\n\n"
              "using_gtid=%d\n"
              "do_domain_ids=%s\n"
              "ignore_domain_ids=%s\n"
              "END_MARKER\n",
              LINES_IN_MASTER_INFO,
              mi->master_log_name, llstr(mi->master_log_pos, lbuf),
              mi->host, mi->user,
              mi->password, mi->port, mi->connect_retry,
              (int)(mi->ssl), mi->ssl_ca, mi->ssl_capath, mi->ssl_cert,
              mi->ssl_cipher, mi->ssl_key, mi->ssl_verify_server_cert,
              heartbeat_buf, "", ignore_server_ids_buf,
              "", 0,
              mi->ssl_crl, mi->ssl_crlpath, mi->using_gtid,
              do_domain_ids_buf, ignore_domain_ids_buf);
  err= flush_io_cache(file);
  if (sync_masterinfo_period && !err &&
      ++(mi->sync_counter) >= sync_masterinfo_period)
  {
    err= my_sync(mi->fd, MYF(MY_WME));
    mi->sync_counter= 0;
  }

  /* Fix err; flush_io_cache()/my_sync() may return -1 */
  err= (err != 0) ? 1 : 0;

done:
  my_free(ignore_server_ids_buf);
  my_free(do_domain_ids_buf);
  my_free(ignore_domain_ids_buf);
  DBUG_RETURN(err);
}


void end_master_info(Master_info* mi)
{
  DBUG_ENTER("end_master_info");

  if (!mi->inited)
    DBUG_VOID_RETURN;
  if (mi->fd >= 0)
  {
    end_io_cache(&mi->file);
    mysql_file_close(mi->fd, MYF(MY_WME));
    mi->fd = -1;
  }
  mi->inited = 0;

  DBUG_VOID_RETURN;
}

/* Multi-Master By P.Linux */
uchar *get_key_master_info(Master_info *mi, size_t *length,
                           my_bool not_used __attribute__((unused)))
{
  /* Return lower case name */
  *length= mi->cmp_connection_name.length;
  return (uchar*) mi->cmp_connection_name.str;
}

/*
  Delete a master info

  Called from my_hash_delete(&master_info_hash)
  Stops associated slave threads and frees master_info
*/

void free_key_master_info(Master_info *mi)
{
  DBUG_ENTER("free_key_master_info");
  mysql_mutex_unlock(&LOCK_active_mi);

  /* Ensure that we are not in reset_slave while this is done */
  mi->lock_slave_threads();
  terminate_slave_threads(mi,SLAVE_FORCE_ALL);
  /* We use 2 here instead of 1 just to make it easier when debugging */
  mi->killed= 2;
  end_master_info(mi);
  end_relay_log_info(&mi->rli);
  mi->unlock_slave_threads();
  delete mi;

  mysql_mutex_lock(&LOCK_active_mi);
  DBUG_VOID_RETURN;
}

/**
   Check if connection name for master_info is valid.

   It's valid if it's a valid system name of length less than
   MAX_CONNECTION_NAME.

   @return
   0 ok
   1 error
*/

bool check_master_connection_name(LEX_CSTRING *name)
{
  if (name->length >= MAX_CONNECTION_NAME)
    return 1;
  return 0;
}
 

/**
   Create a log file with a given suffix.

   @param
   res_file_name	Store result here
   length		Length of res_file_name buffer
   info_file		Original file name (prefix)
   append		1 if we should add suffix last (not before ext)
   suffix		Suffix

   @note
   The suffix is added before the extension of the file name prefixed with '-'.
   The suffix is also converted to lower case and we transform
   all not safe character, as we do with MySQL table names.

   If suffix is an empty string, then we don't add any suffix.
   This is to allow one to use this function also to generate old
   file names without a prefix.
*/

void create_logfile_name_with_suffix(char *res_file_name, size_t length,
                                     const char *info_file, bool append,
                                     LEX_CSTRING *suffix)
{
  char buff[MAX_CONNECTION_NAME+1],
    res[MAX_CONNECTION_NAME * MAX_FILENAME_MBWIDTH+1], *p;

  p= strmake(res_file_name, info_file, length);
  /* If not empty suffix and there is place left for some part of the suffix */
  if (suffix->length != 0 && p <= res_file_name + length -1)
  {
    const char *info_file_end= info_file + (p - res_file_name);
    const char *ext= append ? info_file_end : fn_ext2(info_file);
    size_t res_length, ext_pos, from_length;
    uint errors;

    /* Create null terminated string */
    from_length= strmake(buff, suffix->str, suffix->length) - buff;
    /* Convert to characters usable in a file name */
    res_length= strconvert(system_charset_info, buff, from_length,
                           &my_charset_filename, res, sizeof(res), &errors);
    
    ext_pos= (size_t) (ext - info_file);
    length-= (suffix->length - ext_pos); /* Leave place for extension */
    p= res_file_name + ext_pos;
    *p++= '-';                           /* Add separator */
    p= strmake(p, res, MY_MIN((size_t) (length - (p - res_file_name)),
                           res_length));
    /* Add back extension. We have checked above that there is space for it */
    strmov(p, ext);
  }
}

void copy_filter_setting(Rpl_filter* dst_filter, Rpl_filter* src_filter)
{
  char buf[256];
  String tmp(buf, sizeof(buf), &my_charset_bin);

  dst_filter->get_do_db(&tmp);
  if (tmp.is_empty())
  {
    src_filter->get_do_db(&tmp);
    if (!tmp.is_empty())
      dst_filter->set_do_db(tmp.ptr());
  }

  dst_filter->get_do_table(&tmp);
  if (tmp.is_empty())
  {
    src_filter->get_do_table(&tmp);
    if (!tmp.is_empty())
      dst_filter->set_do_table(tmp.ptr());
  }

  dst_filter->get_ignore_db(&tmp);
  if (tmp.is_empty())
  {
    src_filter->get_ignore_db(&tmp);
    if (!tmp.is_empty())
      dst_filter->set_ignore_db(tmp.ptr());
  }

  dst_filter->get_ignore_table(&tmp);
  if (tmp.is_empty())
  {
    src_filter->get_ignore_table(&tmp);
    if (!tmp.is_empty())
      dst_filter->set_ignore_table(tmp.ptr());
  }

  dst_filter->get_wild_do_table(&tmp);
  if (tmp.is_empty())
  {
    src_filter->get_wild_do_table(&tmp);
    if (!tmp.is_empty())
      dst_filter->set_wild_do_table(tmp.ptr());
  }

  dst_filter->get_wild_ignore_table(&tmp);
  if (tmp.is_empty())
  {
    src_filter->get_wild_ignore_table(&tmp);
    if (!tmp.is_empty())
      dst_filter->set_wild_ignore_table(tmp.ptr());
  }

  dst_filter->get_rewrite_db(&tmp);
  if (tmp.is_empty())
  {
    src_filter->get_rewrite_db(&tmp);
    if (!tmp.is_empty())
      dst_filter->set_rewrite_db(tmp.ptr());
  }
}

Master_info_index::Master_info_index()
{
  size_t filename_length, dir_length;
  /*
    Create the Master_info index file by prepending 'multi-' before
    the master_info_file file name.
  */
  fn_format(index_file_name, master_info_file, mysql_data_home,
            "", MY_UNPACK_FILENAME);
  filename_length= strlen(index_file_name) + 1; /* Count 0 byte */
  dir_length= dirname_length(index_file_name);
  bmove_upp((uchar*) index_file_name + filename_length + 6,
            (uchar*) index_file_name + filename_length,
            filename_length - dir_length);
  memcpy(index_file_name + dir_length, "multi-", 6);

  bzero((char*) &index_file, sizeof(index_file));
  index_file.file= -1;
}


/**
   Free all connection threads

   This is done during early stages of shutdown
   to give connection threads and slave threads time
   to die before ~Master_info_index is called
*/

void Master_info_index::free_connections()
{
  mysql_mutex_assert_owner(&LOCK_active_mi);
  my_hash_reset(&master_info_hash);
}


/**
   Free all connection threads and free structures
*/

Master_info_index::~Master_info_index()
{
  my_hash_free(&master_info_hash);
  end_io_cache(&index_file);
  if (index_file.file >= 0)
    my_close(index_file.file, MYF(MY_WME));
}


/* Load All Master_info from master.info.index File
 * RETURN:
 *   0 - All Success
 *   1 - All Fail
 *   2 - Some Success, Some Fail
 */

bool Master_info_index::init_all_master_info()
{
  int thread_mask;
  int err_num= 0, succ_num= 0; // The number of success read Master_info
  char sign[MAX_CONNECTION_NAME+1];
  File index_file_nr;
  THD *thd;
  DBUG_ENTER("init_all_master_info");

  DBUG_ASSERT(master_info_index);

  if ((index_file_nr= my_open(index_file_name,
                              O_RDWR | O_CREAT | O_BINARY ,
                              MYF(MY_WME | ME_ERROR_LOG))) < 0 ||
      my_sync(index_file_nr, MYF(MY_WME)) ||
      init_io_cache(&index_file, index_file_nr,
                    IO_SIZE, READ_CACHE,
                    my_seek(index_file_nr,0L,MY_SEEK_END,MYF(0)),
                    0, MYF(MY_WME | MY_WAIT_IF_FULL)))
  {
    if (index_file_nr >= 0)
      my_close(index_file_nr,MYF(0));

    sql_print_error("Creation of Master_info index file '%s' failed",
                    index_file_name);
    DBUG_RETURN(1);
  }

  /* Initialize Master_info Hash Table */
  if (my_hash_init(PSI_INSTRUMENT_ME, &master_info_hash, system_charset_info, 
                   MAX_REPLICATION_THREAD, 0, 0, 
                   (my_hash_get_key) get_key_master_info, 
                   (my_hash_free_key)free_key_master_info, HASH_UNIQUE))
  {                                                      
    sql_print_error("Initializing Master_info hash table failed");
    DBUG_RETURN(1);
  }

  thd= new THD(next_thread_id());  /* Needed by start_slave_threads */
  thd->thread_stack= (char*) &thd;
  thd->store_globals();

  reinit_io_cache(&index_file, READ_CACHE, 0L,0,0);
  while (!init_strvar_from_file(sign, sizeof(sign),
                                &index_file, NULL))
  {
    LEX_CSTRING connection_name;
    Master_info *mi;
    char buf_master_info_file[FN_REFLEN];
    char buf_relay_log_info_file[FN_REFLEN];

    connection_name.str=    sign;
    connection_name.length= strlen(sign);
    if (!(mi= new Master_info(&connection_name, relay_log_recovery)) ||
        mi->error())
    {
      delete mi;
      goto error;
    }

    init_thread_mask(&thread_mask,mi,0 /*not inverse*/);

    create_logfile_name_with_suffix(buf_master_info_file,
                                    sizeof(buf_master_info_file),
                                    master_info_file, 0,
                                    &mi->cmp_connection_name);
    create_logfile_name_with_suffix(buf_relay_log_info_file,
                                    sizeof(buf_relay_log_info_file),
                                    relay_log_info_file, 0,
                                    &mi->cmp_connection_name);
    if (global_system_variables.log_warnings > 1)
      sql_print_information("Reading Master_info: '%s'  Relay_info:'%s'",
                            buf_master_info_file, buf_relay_log_info_file);

    mi->lock_slave_threads();
    if (init_master_info(mi, buf_master_info_file, buf_relay_log_info_file, 
                         0, thread_mask))
    {
      err_num++;
      sql_print_error("Initialized Master_info from '%s' failed",
                      buf_master_info_file);
      if (!master_info_index->get_master_info(&connection_name,
                                              Sql_condition::WARN_LEVEL_NOTE))
      {
        /* Master_info is not in HASH; Add it */
        if (master_info_index->add_master_info(mi, FALSE))
          goto error;
        succ_num++;
        mi->unlock_slave_threads();
      }
      else
      {
        /* Master_info already in HASH */
        sql_print_error(ER_THD_OR_DEFAULT(current_thd,
                                          ER_CONNECTION_ALREADY_EXISTS),
                        (int) connection_name.length, connection_name.str,
                        (int) connection_name.length, connection_name.str);
        mi->unlock_slave_threads();
        delete mi;
      }
      continue;
    }
    else
    {
      /* Initialization of Master_info succeeded. Add it to HASH */
      if (global_system_variables.log_warnings > 1)
        sql_print_information("Initialized Master_info from '%s'",
                              buf_master_info_file);
      if (master_info_index->get_master_info(&connection_name,
                                             Sql_condition::WARN_LEVEL_NOTE))
      {
        /* Master_info was already registered */
        sql_print_error(ER_THD_OR_DEFAULT(current_thd,
                                          ER_CONNECTION_ALREADY_EXISTS),
                        (int) connection_name.length, connection_name.str,
                        (int) connection_name.length, connection_name.str);
        mi->unlock_slave_threads();
        delete mi;
        continue;
      }

      /* Master_info was not registered; add it */
      if (master_info_index->add_master_info(mi, FALSE))
        goto error;
      succ_num++;

      if (!opt_skip_slave_start)
      {
        if (start_slave_threads(current_thd,
                                1 /* need mutex */,
                                1 /* wait for start*/,
                                mi,
                                buf_master_info_file,
                                buf_relay_log_info_file,
                                SLAVE_IO | SLAVE_SQL))
        {
          sql_print_error("Failed to create slave threads for connection '%.*s'",
                          (int) connection_name.length,
                          connection_name.str);
          continue;
        }
        if (global_system_variables.log_warnings)
          sql_print_information("Started replication for '%.*s'",
                                (int) connection_name.length,
                                connection_name.str);
      }
      mi->unlock_slave_threads();
    }
  }
  thd->reset_globals();
  delete thd;

  if (!err_num) // No Error on read Master_info
  {
    if (global_system_variables.log_warnings > 2)
      sql_print_information("Reading of all Master_info entries succeeded");
    DBUG_RETURN(0);
  }

  if (succ_num) // Have some Error and some Success
    sql_print_warning("Reading of some Master_info entries failed");
  else
    sql_print_error("Reading of all Master_info entries failed!");
  DBUG_RETURN(1);

error:
  thd->reset_globals();
  delete thd;
  DBUG_RETURN(1);
}


/* Write new master.info to master.info.index File */
bool Master_info_index::write_master_name_to_index_file(LEX_CSTRING *name,
                                                        bool do_sync)
{
  DBUG_ASSERT(my_b_inited(&index_file) != 0);
  DBUG_ENTER("write_master_name_to_index_file");

  /* Don't write default slave to master_info.index */
  if (name->length == 0)
    DBUG_RETURN(0);

  reinit_io_cache(&index_file, WRITE_CACHE,
                  my_b_filelength(&index_file), 0, 0);

  if (my_b_write(&index_file, (uchar*) name->str, name->length) ||
      my_b_write(&index_file, (uchar*) "\n", 1) ||
      flush_io_cache(&index_file) ||
      (do_sync && my_sync(index_file.file, MYF(MY_WME))))
  {
    sql_print_error("Write of new Master_info for '%.*s' to index file failed",
                    (int) name->length, name->str);
    DBUG_RETURN(1);
  }

  DBUG_RETURN(0);
}


/**
   Get Master_info for a connection and lock the object from deletion

   @param
   connection_name	Connection name
   warning		WARN_LEVEL_NOTE -> Don't print anything
			WARN_LEVEL_WARN -> Issue warning if not exists
			WARN_LEVEL_ERROR-> Issue error if not exists
*/

Master_info *get_master_info(const LEX_CSTRING *connection_name,
                             Sql_condition::enum_warning_level warning)
{
  Master_info *mi;
  DBUG_ENTER("get_master_info");

  /* Protect against inserts into hash */
  mysql_mutex_lock(&LOCK_active_mi);
  /*
    The following can only be true during shutdown when slave has been killed
    but some other threads are still trying to access slave statistics.
  */
  if (unlikely(!master_info_index)) 
  {
    if (warning != Sql_condition::WARN_LEVEL_NOTE)
      my_error(WARN_NO_MASTER_INFO,
               MYF(warning == Sql_condition::WARN_LEVEL_WARN ?
                   ME_WARNING : 0),
               (int) connection_name->length, connection_name->str);
    mysql_mutex_unlock(&LOCK_active_mi);
    DBUG_RETURN(0);
  }
  if ((mi= master_info_index->get_master_info(connection_name, warning)))
  {
    /*
      We have to use sleep_lock here. If we would use LOCK_active_mi
      then we would take locks in wrong order in Master_info::release()
    */
    mysql_mutex_lock(&mi->sleep_lock);
    mi->users++;
    DBUG_PRINT("info",("users: %d", mi->users));
    mysql_mutex_unlock(&mi->sleep_lock);
  }
  mysql_mutex_unlock(&LOCK_active_mi);
  DBUG_RETURN(mi);
}


/**
   Release master info.
   Signals ~Master_info that it's now safe to delete it
*/

void Master_info::release()
{
  mysql_mutex_lock(&sleep_lock);
  if (!--users && killed)
  {
    /* Signal ~Master_info that it's ok to now free it */
    mysql_cond_signal(&sleep_cond);
  }
  mysql_mutex_unlock(&sleep_lock);
}


/**
   Get Master_info for a connection

   @param
   connection_name	Connection name
   warning		WARN_LEVEL_NOTE -> Don't print anything
			WARN_LEVEL_WARN -> Issue warning if not exists
			WARN_LEVEL_ERROR-> Issue error if not exists
*/

Master_info *
Master_info_index::get_master_info(const LEX_CSTRING *connection_name,
                                   Sql_condition::enum_warning_level warning)
{
  Master_info *mi;
  char buff[MAX_CONNECTION_NAME+1], *res;
  size_t buff_length;
  DBUG_ENTER("get_master_info");
  DBUG_PRINT("enter",
             ("connection_name: '%.*s'", (int) connection_name->length,
              connection_name->str));

  /* Make name lower case for comparison */
  res= strmake(buff, connection_name->str, connection_name->length);
  my_casedn_str(system_charset_info, buff); 
  buff_length= (size_t) (res-buff);

  mi= (Master_info*) my_hash_search(&master_info_hash,
                                    (uchar*) buff, buff_length);
  if (!mi && warning != Sql_condition::WARN_LEVEL_NOTE)
  {
    my_error(WARN_NO_MASTER_INFO,
             MYF(warning == Sql_condition::WARN_LEVEL_WARN ? ME_WARNING :
                 0),
             (int) connection_name->length,
             connection_name->str);
  }
  DBUG_RETURN(mi);
}


/* Check Master_host & Master_port is duplicated or not */
bool Master_info_index::check_duplicate_master_info(LEX_CSTRING *name_arg,
                                                    const char *host,
                                                    uint port)
{
  Master_info *mi;
  DBUG_ENTER("check_duplicate_master_info");

  mysql_mutex_assert_owner(&LOCK_active_mi);
  DBUG_ASSERT(master_info_index);

  /* Get full host and port name */
  if ((mi= master_info_index->get_master_info(name_arg,
                                              Sql_condition::WARN_LEVEL_NOTE)))
  {
    if (!host)
      host= mi->host;
    if (!port)
      port= mi->port;
  }
  if (!host || !port)
    DBUG_RETURN(FALSE);                         // Not comparable yet

  for (uint i= 0; i < master_info_hash.records; ++i)
  {
    Master_info *tmp_mi;
    tmp_mi= (Master_info *) my_hash_element(&master_info_hash, i);
    if (tmp_mi == mi)
      continue;                                 // Current connection
    if (!strcasecmp(host, tmp_mi->host) && port == tmp_mi->port)
    {
      my_error(ER_CONNECTION_ALREADY_EXISTS, MYF(0),
               (int) name_arg->length,
               name_arg->str,
               (int) tmp_mi->connection_name.length,
               tmp_mi->connection_name.str);
      DBUG_RETURN(TRUE);
    }
  }
  DBUG_RETURN(FALSE);
}


/* Add a Master_info class to Hash Table */
bool Master_info_index::add_master_info(Master_info *mi, bool write_to_file)
{
  /*
    We have to protect against shutdown to ensure we are not calling
    my_hash_insert() while my_hash_free() is in progress
  */
  if (unlikely(abort_loop) ||
      !my_hash_insert(&master_info_hash, (uchar*) mi))
  {
    if (global_system_variables.log_warnings > 2)
      sql_print_information("Added new Master_info '%.*s' to hash table",
                            (int) mi->connection_name.length,
                            mi->connection_name.str);
    if (write_to_file)
      return write_master_name_to_index_file(&mi->connection_name, 1);
    return FALSE;
  }

  /* Impossible error (EOM) ? */
  sql_print_error("Adding new entry '%.*s' to master_info failed",
                  (int) mi->connection_name.length,
                  mi->connection_name.str);
  return TRUE;
}


/**
   Remove a Master_info class From Hash Table

   TODO: Change this to use my_rename() to make the file name creation
   atomic
*/

bool Master_info_index::remove_master_info(Master_info *mi, bool clear_log_files)
{
  char tmp_name[FN_REFLEN];
  DBUG_ENTER("remove_master_info");
  mysql_mutex_assert_owner(&LOCK_active_mi);

  if (clear_log_files)
  {
    /* This code is only executed when change_master() failes to create a new master info */

    // Delete any temporary relay log files that could have been created by change_master()
    mi->rli.relay_log.reset_logs(current_thd, 0, (rpl_gtid*) 0, 0, 0);
    /* Delete master-'connection'.info */
    create_logfile_name_with_suffix(tmp_name,
                                    sizeof(tmp_name),
                                    master_info_file, 0,
                                    &mi->cmp_connection_name);
    my_delete(tmp_name, MYF(0));
    /* Delete relay-log-'connection'.info */
    create_logfile_name_with_suffix(tmp_name,
                                    sizeof(tmp_name),
                                    relay_log_info_file, 0,
                                    &mi->cmp_connection_name);
    my_delete(tmp_name, MYF(0));
  }

  // Delete Master_info and rewrite others to file
  if (!my_hash_delete(&master_info_hash, (uchar*) mi))
  {
    File index_file_nr;

    // Close IO_CACHE and FILE handler fisrt
    end_io_cache(&index_file);
    my_close(index_file.file, MYF(MY_WME));

    // Reopen File and truncate it
    if ((index_file_nr= my_open(index_file_name,
                                O_RDWR | O_CREAT | O_TRUNC | O_BINARY ,
                                MYF(MY_WME))) < 0 ||
        init_io_cache(&index_file, index_file_nr,
                      IO_SIZE, WRITE_CACHE,
                      my_seek(index_file_nr,0L,MY_SEEK_END,MYF(0)),
                      0, MYF(MY_WME | MY_WAIT_IF_FULL)))
    {
      int error= my_errno;
      if (index_file_nr >= 0)
        my_close(index_file_nr,MYF(0));

      sql_print_error("Create of Master Info Index file '%s' failed with "
                      "error: %M",
                      index_file_name, error);
      DBUG_RETURN(TRUE);
    }

    // Rewrite Master_info.index
    for (uint i= 0; i< master_info_hash.records; ++i)
    {
      Master_info *tmp_mi;
      tmp_mi= (Master_info *) my_hash_element(&master_info_hash, i);
      write_master_name_to_index_file(&tmp_mi->connection_name, 0);
    }
    if (my_sync(index_file_nr, MYF(MY_WME)))
      DBUG_RETURN(TRUE);
  }
  DBUG_RETURN(FALSE);
}


/**
   give_error_if_slave_running()

   @param
   already_locked  0 if we need to lock, 1 if we have LOCK_active_mi_locked  

   @return
   TRUE  	If some slave is running.  An error is printed
   FALSE	No slave is running
*/

bool give_error_if_slave_running(bool already_locked)
{
  bool ret= 0;
  DBUG_ENTER("give_error_if_slave_running");

  if (!already_locked)
    mysql_mutex_lock(&LOCK_active_mi);
  if (!master_info_index)
  {
    my_error(ER_SERVER_SHUTDOWN, MYF(0));
    ret= 1;
  }
  else
  {
    HASH *hash= &master_info_index->master_info_hash;
    for (uint i= 0; i< hash->records; ++i)
    {
      Master_info *mi;
      mi= (Master_info *) my_hash_element(hash, i);
      if (mi->rli.slave_running != MYSQL_SLAVE_NOT_RUN)
      {
        my_error(ER_SLAVE_MUST_STOP, MYF(0), (int) mi->connection_name.length,
                 mi->connection_name.str);
        ret= 1;
        break;
      }
    }
  }
  if (!already_locked)
    mysql_mutex_unlock(&LOCK_active_mi);
  DBUG_RETURN(ret);
}


/**
   any_slave_sql_running()

   @param
   already_locked  0 if we need to lock, 1 if we have LOCK_active_mi_locked

   @return
   0            No Slave SQL thread is running
   #		Number of slave SQL thread running

   Note that during shutdown we return 1. This is needed to ensure we
   don't try to resize thread pool during shutdown as during shutdown
   master_info_hash may be freeing the hash and during that time
   hash entries can't be accessed.
*/

uint any_slave_sql_running(bool already_locked)
{
  uint count= 0;
  HASH *hash;
  DBUG_ENTER("any_slave_sql_running");

  if (!already_locked)
    mysql_mutex_lock(&LOCK_active_mi);
  else
    mysql_mutex_assert_owner(&LOCK_active_mi);
  if (unlikely(abort_loop || !master_info_index))
    count= 1;
  else
  {
    hash= &master_info_index->master_info_hash;
    for (uint i= 0; i< hash->records; ++i)
    {
      Master_info *mi= (Master_info *)my_hash_element(hash, i);
      if (mi->rli.slave_running != MYSQL_SLAVE_NOT_RUN)
        count++;
    }
  }
  if (!already_locked)
    mysql_mutex_unlock(&LOCK_active_mi);
  DBUG_RETURN(count);
}


/**
   Master_info_index::start_all_slaves()

   Start all slaves that was not running.

   @return
   TRUE  	Error
   FALSE	Everything ok.

   This code is written so that we don't keep LOCK_active_mi active
   while we are starting a slave.
*/

bool Master_info_index::start_all_slaves(THD *thd)
{
  bool result= FALSE;
  DBUG_ENTER("start_all_slaves");
  mysql_mutex_assert_owner(&LOCK_active_mi);

  for (uint i= 0; i< master_info_hash.records; i++)
  {
    Master_info *mi;
    mi= (Master_info *) my_hash_element(&master_info_hash, i);
    mi->in_start_all_slaves= 0;
  }

  for (uint i= 0; i< master_info_hash.records; )
  {
    int error;
    Master_info *mi;
    mi= (Master_info *) my_hash_element(&master_info_hash, i);

    /*
      Try to start all slaves that are configured (host is defined)
      and are not already running
    */
    if (!((mi->slave_running == MYSQL_SLAVE_NOT_RUN ||
           !mi->rli.slave_running) && *mi->host) ||
        mi->in_start_all_slaves)
    {
      i++;
      continue;
    }
    mi->in_start_all_slaves= 1;

    mysql_mutex_lock(&mi->sleep_lock);
    mi->users++;                                // Mark used
    mysql_mutex_unlock(&mi->sleep_lock);
    mysql_mutex_unlock(&LOCK_active_mi);
    error= start_slave(thd, mi, 1);
    mi->release();
    mysql_mutex_lock(&LOCK_active_mi);
    if (unlikely(error))
    {
      my_error(ER_CANT_START_STOP_SLAVE, MYF(0),
               "START",
               (int) mi->connection_name.length,
               mi->connection_name.str);
      result= 1;
      if (error < 0)                            // fatal error
        break;
    }
    else if (thd)
      push_warning_printf(thd, Sql_condition::WARN_LEVEL_NOTE,
                          ER_SLAVE_STARTED, ER_THD(thd, ER_SLAVE_STARTED),
                          (int) mi->connection_name.length,
                          mi->connection_name.str);
    /* Restart from first element as master_info_hash may have changed */
    i= 0;
    continue;
  }
  DBUG_RETURN(result);
}


/**
   Master_info_index::stop_all_slaves()

   Start all slaves that was not running.

   @param	thread id from user

   @return
   TRUE  	Error
   FALSE	Everything ok.

   This code is written so that we don't keep LOCK_active_mi active
   while we are stopping a slave.
*/

bool Master_info_index::stop_all_slaves(THD *thd)
{
  bool result= FALSE;
  DBUG_ENTER("stop_all_slaves");
  mysql_mutex_assert_owner(&LOCK_active_mi);
  DBUG_ASSERT(thd);

  for (uint i= 0; i< master_info_hash.records; i++)
  {
    Master_info *mi;
    mi= (Master_info *) my_hash_element(&master_info_hash, i);
    mi->in_stop_all_slaves= 0;
  }

  for (uint i= 0; i< master_info_hash.records ;)
  {
    int error;
    Master_info *mi;
    mi= (Master_info *) my_hash_element(&master_info_hash, i);
    if (!(mi->slave_running != MYSQL_SLAVE_NOT_RUN ||
          mi->rli.slave_running) ||
        mi->in_stop_all_slaves)
    {
      i++;
      continue;
    }
    mi->in_stop_all_slaves= 1;                  // Protection for loops

    mysql_mutex_lock(&mi->sleep_lock);
    mi->users++;                                // Mark used
    mysql_mutex_unlock(&mi->sleep_lock);
    mysql_mutex_unlock(&LOCK_active_mi);
    error= stop_slave(thd, mi, 1);
    mi->release();
    mysql_mutex_lock(&LOCK_active_mi);
    if (unlikely(error))
    {
      my_error(ER_CANT_START_STOP_SLAVE, MYF(0),
               "STOP",
               (int) mi->connection_name.length,
               mi->connection_name.str);
      result= 1;
      if (error < 0)                            // Fatal error
        break;
    }
    else
      push_warning_printf(thd, Sql_condition::WARN_LEVEL_NOTE,
                          ER_SLAVE_STOPPED, ER_THD(thd, ER_SLAVE_STOPPED),
                          (int) mi->connection_name.length,
                          mi->connection_name.str);
    /* Restart from first element as master_info_hash may have changed */
    i= 0;
    continue;
  }
  DBUG_RETURN(result);
}

Domain_id_filter::Domain_id_filter() : m_filter(false)
{
  for (int i= DO_DOMAIN_IDS; i <= IGNORE_DOMAIN_IDS; i ++)
  {
    my_init_dynamic_array(PSI_INSTRUMENT_ME, &m_domain_ids[i], sizeof(ulong),
                          16, 16, MYF(0));
  }
}

Domain_id_filter::~Domain_id_filter()
{
  for (int i= DO_DOMAIN_IDS; i <= IGNORE_DOMAIN_IDS; i ++)
  {
    delete_dynamic(&m_domain_ids[i]);
  }
}

/**
  Update m_filter flag for the current group by looking up its domain id in the
  domain ids list. DO_DOMAIN_IDS list is only looked-up is both (do & ignore)
  list are non-empty.
*/
void Domain_id_filter::do_filter(ulong domain_id)
{
  DYNAMIC_ARRAY *do_domain_ids= &m_domain_ids[DO_DOMAIN_IDS];
  DYNAMIC_ARRAY *ignore_domain_ids= &m_domain_ids[IGNORE_DOMAIN_IDS];

  if (do_domain_ids->elements > 0)
  {
    if (likely(do_domain_ids->elements == 1))
      m_filter= ((* (ulong *) dynamic_array_ptr(do_domain_ids, 0))
                 != domain_id);
    else
      m_filter= (bsearch((const ulong *) &domain_id, do_domain_ids->buffer,
                         do_domain_ids->elements, sizeof(ulong),
                         change_master_id_cmp) == NULL);
  }
  else if (ignore_domain_ids->elements > 0)
  {
    if (likely(ignore_domain_ids->elements == 1))
      m_filter= ((* (ulong *) dynamic_array_ptr(ignore_domain_ids, 0)) ==
                 domain_id);
    else
      m_filter= (bsearch((const ulong *) &domain_id, ignore_domain_ids->buffer,
                         ignore_domain_ids->elements, sizeof(ulong),
                         change_master_id_cmp) != NULL);
  }
  return;
}

/**
  Reset m_filter. It should be called when IO thread receives COMMIT_EVENT or
  XID_EVENT.
*/
void Domain_id_filter::reset_filter()
{
  m_filter= false;
}

void Domain_id_filter::clear_ids()
{
  reset_dynamic(&m_domain_ids[DO_DOMAIN_IDS]);
  reset_dynamic(&m_domain_ids[IGNORE_DOMAIN_IDS]);
}

/**
  Update the do/ignore domain id filter lists.

  @param do_ids     [IN]            domain ids to be kept
  @param ignore_ids [IN]            domain ids to be filtered out
  @param using_gtid [IN]            use GTID?

  @retval false                     Success
          true                      Error
*/
bool Domain_id_filter::update_ids(DYNAMIC_ARRAY *do_ids,
                                  DYNAMIC_ARRAY *ignore_ids,
                                  bool using_gtid)
{
  bool do_list_empty, ignore_list_empty;

  if (do_ids)
  {
    do_list_empty= (do_ids->elements > 0) ? false : true;
  } else {
    do_list_empty= (m_domain_ids[DO_DOMAIN_IDS].elements > 0) ? false : true;
  }

  if (ignore_ids)
  {
    ignore_list_empty= (ignore_ids->elements > 0) ? false : true;
  } else {
    ignore_list_empty= (m_domain_ids[IGNORE_DOMAIN_IDS].elements > 0) ? false :
      true;
  }

  if (!do_list_empty && !ignore_list_empty)
  {
    sql_print_error("Both DO_DOMAIN_IDS & IGNORE_DOMAIN_IDS lists can't be "
                    "non-empty at the same time");
    return true;
  }

  if (using_gtid == Master_info::USE_GTID_NO &&
      (!do_list_empty || !ignore_list_empty))
  {
    sql_print_error("DO_DOMAIN_IDS or IGNORE_DOMAIN_IDS lists can't be "
                    "non-empty in non-GTID mode (MASTER_USE_GTID=no)");
    return true;
  }

  if (do_ids)
    update_change_master_ids(do_ids, &m_domain_ids[DO_DOMAIN_IDS]);

  if (ignore_ids)
    update_change_master_ids(ignore_ids, &m_domain_ids[IGNORE_DOMAIN_IDS]);

  m_filter= false;

  return false;
}

/**
  Serialize and store the ids from domain id lists into the thd's protocol
  buffer.

  @param thd [IN]                   thread handler

  @retval void
*/
void Domain_id_filter::store_ids(THD *thd)
{
  for (int i= DO_DOMAIN_IDS; i <= IGNORE_DOMAIN_IDS; i ++)
  {
    prot_store_ids(thd, &m_domain_ids[i]);
  }
}

/**
  Initialize the given domain_id list (DYNAMIC_ARRAY) with the
  space-separated list of numbers from the specified IO_CACHE where
  the first number represents the total number of entries to follows.

  @param f    [IN]                  IO_CACHE file
  @param type [IN]                  domain id list type

  @retval false                     Success
          true                      Error
*/
bool Domain_id_filter::init_ids(IO_CACHE *f, enum_list_type type)
{
  return init_dynarray_intvar_from_file(&m_domain_ids[type], f);
}

/**
  Return the elements of the give domain id list type as string.

  @param type [IN]                  domain id list type

  @retval                           a string buffer storing the total number
                                    of elements followed by the individual
                                    elements (space-separated) in the
                                    specified list.

  Note: Its caller's responsibility to free the returned string buffer.
*/
char *Domain_id_filter::as_string(enum_list_type type)
{
  char *buf;
  size_t sz;
  DYNAMIC_ARRAY *ids= &m_domain_ids[type];

  sz= (sizeof(ulong) * 3 + 1) * (1 + ids->elements);

  if (!(buf= (char *) my_malloc(PSI_INSTRUMENT_ME, sz, MYF(MY_WME))))
    return NULL;

  // Store the total number of elements followed by the individual elements.
  size_t cur_len= sprintf(buf, "%zu", ids->elements);
  sz-= cur_len;

  for (uint i= 0; i < ids->elements; i++)
  {
    ulong domain_id;
    get_dynamic(ids, (void *) &domain_id, i);
    cur_len+= my_snprintf(buf + cur_len, sz, " %lu", domain_id);
    sz-= cur_len;
  }
  return buf;
}

void update_change_master_ids(DYNAMIC_ARRAY *new_ids, DYNAMIC_ARRAY *old_ids)
{
  reset_dynamic(old_ids);

  /* bsearch requires an ordered list. */
  sort_dynamic(new_ids, change_master_id_cmp);

  for (uint i= 0; i < new_ids->elements; i++)
  {
    ulong id;
    get_dynamic(new_ids, (void *) &id, i);

    if (bsearch((const ulong *) &id, old_ids->buffer, old_ids->elements,
                sizeof(ulong), change_master_id_cmp) == NULL)
    {
      insert_dynamic(old_ids, (ulong *) &id);
    }
  }
  return;
}

/**
  Serialize and store the ids from the given ids DYNAMIC_ARRAY into the thd's
  protocol buffer.

  @param thd [IN]                   thread handler
  @param ids [IN]                   ids list

  @retval void
*/

void prot_store_ids(THD *thd, DYNAMIC_ARRAY *ids)
{
  char buff[FN_REFLEN];
  uint i, cur_len;

  for (i= 0, buff[0]= 0, cur_len= 0; i < ids->elements; i++)
  {
    ulong id, len;
    char dbuff[FN_REFLEN];
    get_dynamic(ids, (void *) &id, i);
    len= sprintf(dbuff, (i == 0 ? "%lu" : ", %lu"), id);
    if (cur_len + len + 4 > FN_REFLEN)
    {
      /*
        break the loop whenever remained space could not fit
        ellipses on the next cycle
      */
      cur_len+= sprintf(dbuff + cur_len, "...");
      break;
    }
    cur_len+= sprintf(buff + cur_len, "%s", dbuff);
  }
  thd->protocol->store(buff, cur_len, &my_charset_bin);
  return;
}


bool Master_info_index::flush_all_relay_logs()
{
  DBUG_ENTER("flush_all_relay_logs");
  bool result= false;
  int error= 0;
  mysql_mutex_lock(&LOCK_active_mi);
  for (uint i= 0; i< master_info_hash.records; i++)
  {
    Master_info *mi;
    mi= (Master_info *) my_hash_element(&master_info_hash, i);
    mi->in_flush_all_relay_logs= 0;
  }
  for (uint i=0; i < master_info_hash.records;)
  {
    Master_info *mi;
    mi= (Master_info *)my_hash_element(&master_info_hash, i);
    DBUG_ASSERT(mi);

    if (mi->in_flush_all_relay_logs)
    {
      i++;
      continue;
    }
    mi->in_flush_all_relay_logs= 1;

    mysql_mutex_lock(&mi->sleep_lock);
    mi->users++;                                // Mark used
    mysql_mutex_unlock(&mi->sleep_lock);
    mysql_mutex_unlock(&LOCK_active_mi);

    mysql_mutex_lock(&mi->data_lock);
    error= rotate_relay_log(mi);
    mysql_mutex_unlock(&mi->data_lock);
    mi->release();
    mysql_mutex_lock(&LOCK_active_mi);

    if (unlikely(error))
    {
      result= true;
      break;
    }
    /* Restart from first element as master_info_hash may have changed */
    i= 0;
    continue;
  }
  mysql_mutex_unlock(&LOCK_active_mi);
  DBUG_RETURN(result);
}

#endif /* HAVE_REPLICATION */