/
trx0sys.c
2049 lines (1647 loc) · 55.4 KB
/
trx0sys.c
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
/*****************************************************************************
Copyright (c) 1996, 2013, Oracle and/or its affiliates. All Rights Reserved.
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 Street, Suite 500, Boston, MA 02110-1335 USA
*****************************************************************************/
/**************************************************//**
@file trx/trx0sys.c
Transaction system
Created 3/26/1996 Heikki Tuuri
*******************************************************/
#include "trx0sys.h"
#ifdef UNIV_NONINL
#include "trx0sys.ic"
#endif
#ifndef UNIV_HOTBACKUP
#include "fsp0fsp.h"
#include "mtr0log.h"
#include "mtr0log.h"
#include "trx0trx.h"
#include "trx0rseg.h"
#include "trx0undo.h"
#include "srv0srv.h"
#include "srv0start.h"
#include "trx0purge.h"
#include "log0log.h"
#include "log0recv.h"
#include "os0file.h"
#include "read0read.h"
/** The file format tag structure with id and name. */
struct file_format_struct {
ulint id; /*!< id of the file format */
const char* name; /*!< text representation of the
file format */
mutex_t mutex; /*!< covers changes to the above
fields */
};
/** The file format tag */
typedef struct file_format_struct file_format_t;
/** The transaction system */
UNIV_INTERN trx_sys_t* trx_sys = NULL;
/** The doublewrite buffer */
UNIV_INTERN trx_doublewrite_t* trx_doublewrite = NULL;
/** The following is set to TRUE when we are upgrading from pre-4.1
format data files to the multiple tablespaces format data files */
UNIV_INTERN ibool trx_doublewrite_must_reset_space_ids = FALSE;
/** Set to TRUE when the doublewrite buffer is being created */
UNIV_INTERN ibool trx_doublewrite_buf_is_being_created = FALSE;
/** The following is TRUE when we are using the database in the
post-4.1 format, i.e., we have successfully upgraded, or have created
a new database installation */
UNIV_INTERN ibool trx_sys_multiple_tablespace_format = FALSE;
/** In a MySQL replication slave, in crash recovery we store the master log
file name and position here. */
/* @{ */
/** Master binlog file name */
UNIV_INTERN char trx_sys_mysql_master_log_name[TRX_SYS_MYSQL_MASTER_LOG_NAME_LEN];
/** Master binlog file position. We have successfully got the updates
up to this position. -1 means that no crash recovery was needed, or
there was no master log position info inside InnoDB.*/
UNIV_INTERN ib_int64_t trx_sys_mysql_master_log_pos = -1;
/* @} */
UNIV_INTERN char trx_sys_mysql_relay_log_name[TRX_SYS_MYSQL_MASTER_LOG_NAME_LEN];
UNIV_INTERN ib_int64_t trx_sys_mysql_relay_log_pos = -1;
/** If this MySQL server uses binary logging, after InnoDB has been inited
and if it has done a crash recovery, we store the binlog file name and position
here. */
/* @{ */
/** Binlog file name */
UNIV_INTERN char trx_sys_mysql_bin_log_name[TRX_SYS_MYSQL_LOG_NAME_LEN];
/** Binlog file position, or -1 if unknown */
UNIV_INTERN ib_int64_t trx_sys_mysql_bin_log_pos = -1;
/* @} */
#endif /* !UNIV_HOTBACKUP */
/** List of animal names representing file format. */
static const char* file_format_name_map[] = {
"Antelope",
"Barracuda",
"Cheetah",
"Dragon",
"Elk",
"Fox",
"Gazelle",
"Hornet",
"Impala",
"Jaguar",
"Kangaroo",
"Leopard",
"Moose",
"Nautilus",
"Ocelot",
"Porpoise",
"Quail",
"Rabbit",
"Shark",
"Tiger",
"Urchin",
"Viper",
"Whale",
"Xenops",
"Yak",
"Zebra"
};
/** The number of elements in the file format name array. */
static const ulint FILE_FORMAT_NAME_N
= sizeof(file_format_name_map) / sizeof(file_format_name_map[0]);
#ifdef UNIV_PFS_MUTEX
/* Key to register the mutex with performance schema */
UNIV_INTERN mysql_pfs_key_t trx_doublewrite_mutex_key;
UNIV_INTERN mysql_pfs_key_t file_format_max_mutex_key;
#endif /* UNIV_PFS_MUTEX */
#ifndef UNIV_HOTBACKUP
#ifdef UNIV_DEBUG
/* Flag to control TRX_RSEG_N_SLOTS behavior debugging. */
UNIV_INTERN uint trx_rseg_n_slots_debug = 0;
#endif
/** This is used to track the maximum file format id known to InnoDB. It's
updated via SET GLOBAL innodb_file_format_max = 'x' or when we open
or create a table. */
static file_format_t file_format_max;
/****************************************************************//**
Determines if a page number is located inside the doublewrite buffer.
@return TRUE if the location is inside the two blocks of the
doublewrite buffer */
UNIV_INTERN
ibool
trx_doublewrite_page_inside(
/*========================*/
ulint page_no) /*!< in: page number */
{
if (trx_doublewrite == NULL) {
return(FALSE);
}
if (page_no >= trx_doublewrite->block1
&& page_no < trx_doublewrite->block1
+ TRX_SYS_DOUBLEWRITE_BLOCK_SIZE) {
return(TRUE);
}
if (page_no >= trx_doublewrite->block2
&& page_no < trx_doublewrite->block2
+ TRX_SYS_DOUBLEWRITE_BLOCK_SIZE) {
return(TRUE);
}
return(FALSE);
}
/****************************************************************//**
Creates or initialializes the doublewrite buffer at a database start. */
static
void
trx_doublewrite_init(
/*=================*/
byte* doublewrite) /*!< in: pointer to the doublewrite buf
header on trx sys page */
{
trx_doublewrite = mem_alloc(sizeof(trx_doublewrite_t));
/* Since we now start to use the doublewrite buffer, no need to call
fsync() after every write to a data file */
#ifdef UNIV_DO_FLUSH
os_do_not_call_flush_at_each_write = TRUE;
#endif /* UNIV_DO_FLUSH */
mutex_create(trx_doublewrite_mutex_key,
&trx_doublewrite->mutex, SYNC_DOUBLEWRITE);
trx_doublewrite->first_free = 0;
trx_doublewrite->block1 = mach_read_from_4(
doublewrite + TRX_SYS_DOUBLEWRITE_BLOCK1);
trx_doublewrite->block2 = mach_read_from_4(
doublewrite + TRX_SYS_DOUBLEWRITE_BLOCK2);
trx_doublewrite->write_buf_unaligned = ut_malloc(
(1 + 2 * TRX_SYS_DOUBLEWRITE_BLOCK_SIZE) * UNIV_PAGE_SIZE);
trx_doublewrite->write_buf = ut_align(
trx_doublewrite->write_buf_unaligned, UNIV_PAGE_SIZE);
trx_doublewrite->buf_block_arr = mem_alloc(
2 * TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * sizeof(void*));
}
/****************************************************************//**
Marks the trx sys header when we have successfully upgraded to the >= 4.1.x
multiple tablespace format. */
UNIV_INTERN
void
trx_sys_mark_upgraded_to_multiple_tablespaces(void)
/*===============================================*/
{
buf_block_t* block;
byte* doublewrite;
mtr_t mtr;
/* We upgraded to 4.1.x and reset the space id fields in the
doublewrite buffer. Let us mark to the trx_sys header that the upgrade
has been done. */
mtr_start(&mtr);
block = buf_page_get(TRX_SYS_SPACE, 0, TRX_SYS_PAGE_NO,
RW_X_LATCH, &mtr);
buf_block_dbg_add_level(block, SYNC_NO_ORDER_CHECK);
doublewrite = buf_block_get_frame(block) + TRX_SYS_DOUBLEWRITE;
mlog_write_ulint(doublewrite + TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED,
TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED_N,
MLOG_4BYTES, &mtr);
mtr_commit(&mtr);
/* Flush the modified pages to disk and make a checkpoint */
log_make_checkpoint_at(IB_ULONGLONG_MAX, TRUE);
trx_sys_multiple_tablespace_format = TRUE;
}
/****************************************************************//**
Creates the doublewrite buffer to a new InnoDB installation. The header of the
doublewrite buffer is placed on the trx system header page. */
UNIV_INTERN
void
trx_sys_create_doublewrite_buf(void)
/*================================*/
{
buf_block_t* block;
buf_block_t* block2;
buf_block_t* new_block;
byte* doublewrite;
byte* fseg_header;
ulint page_no;
ulint prev_page_no;
ulint i;
mtr_t mtr;
if (trx_doublewrite) {
/* Already inited */
return;
}
start_again:
mtr_start(&mtr);
trx_doublewrite_buf_is_being_created = TRUE;
block = buf_page_get(TRX_SYS_SPACE, 0, TRX_SYS_PAGE_NO,
RW_X_LATCH, &mtr);
buf_block_dbg_add_level(block, SYNC_NO_ORDER_CHECK);
doublewrite = buf_block_get_frame(block) + TRX_SYS_DOUBLEWRITE;
if (mach_read_from_4(doublewrite + TRX_SYS_DOUBLEWRITE_MAGIC)
== TRX_SYS_DOUBLEWRITE_MAGIC_N) {
/* The doublewrite buffer has already been created:
just read in some numbers */
trx_doublewrite_init(doublewrite);
mtr_commit(&mtr);
trx_doublewrite_buf_is_being_created = FALSE;
} else {
fprintf(stderr,
"InnoDB: Doublewrite buffer not found:"
" creating new\n");
if (buf_pool_get_curr_size()
< ((2 * TRX_SYS_DOUBLEWRITE_BLOCK_SIZE
+ FSP_EXTENT_SIZE / 2 + 100)
* UNIV_PAGE_SIZE)) {
fprintf(stderr,
"InnoDB: Cannot create doublewrite buffer:"
" you must\n"
"InnoDB: increase your buffer pool size.\n"
"InnoDB: Cannot continue operation.\n");
exit(1);
}
block2 = fseg_create(TRX_SYS_SPACE, TRX_SYS_PAGE_NO,
TRX_SYS_DOUBLEWRITE
+ TRX_SYS_DOUBLEWRITE_FSEG, &mtr);
/* fseg_create acquires a second latch on the page,
therefore we must declare it: */
buf_block_dbg_add_level(block2, SYNC_NO_ORDER_CHECK);
if (block2 == NULL) {
fprintf(stderr,
"InnoDB: Cannot create doublewrite buffer:"
" you must\n"
"InnoDB: increase your tablespace size.\n"
"InnoDB: Cannot continue operation.\n");
/* We exit without committing the mtr to prevent
its modifications to the database getting to disk */
exit(1);
}
fseg_header = buf_block_get_frame(block)
+ TRX_SYS_DOUBLEWRITE + TRX_SYS_DOUBLEWRITE_FSEG;
prev_page_no = 0;
for (i = 0; i < 2 * TRX_SYS_DOUBLEWRITE_BLOCK_SIZE
+ FSP_EXTENT_SIZE / 2; i++) {
new_block = fseg_alloc_free_page(
fseg_header, prev_page_no + 1, FSP_UP, &mtr);
if (new_block == NULL) {
fprintf(stderr,
"InnoDB: Cannot create doublewrite"
" buffer: you must\n"
"InnoDB: increase your"
" tablespace size.\n"
"InnoDB: Cannot continue operation.\n"
);
exit(1);
}
/* We read the allocated pages to the buffer pool;
when they are written to disk in a flush, the space
id and page number fields are also written to the
pages. When we at database startup read pages
from the doublewrite buffer, we know that if the
space id and page number in them are the same as
the page position in the tablespace, then the page
has not been written to in doublewrite. */
ut_ad(rw_lock_get_x_lock_count(&new_block->lock) == 1);
page_no = buf_block_get_page_no(new_block);
if (i == FSP_EXTENT_SIZE / 2) {
ut_a(page_no == FSP_EXTENT_SIZE);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_BLOCK1,
page_no, MLOG_4BYTES, &mtr);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_REPEAT
+ TRX_SYS_DOUBLEWRITE_BLOCK1,
page_no, MLOG_4BYTES, &mtr);
} else if (i == FSP_EXTENT_SIZE / 2
+ TRX_SYS_DOUBLEWRITE_BLOCK_SIZE) {
ut_a(page_no == 2 * FSP_EXTENT_SIZE);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_BLOCK2,
page_no, MLOG_4BYTES, &mtr);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_REPEAT
+ TRX_SYS_DOUBLEWRITE_BLOCK2,
page_no, MLOG_4BYTES, &mtr);
} else if (i > FSP_EXTENT_SIZE / 2) {
ut_a(page_no == prev_page_no + 1);
}
prev_page_no = page_no;
}
mlog_write_ulint(doublewrite + TRX_SYS_DOUBLEWRITE_MAGIC,
TRX_SYS_DOUBLEWRITE_MAGIC_N,
MLOG_4BYTES, &mtr);
mlog_write_ulint(doublewrite + TRX_SYS_DOUBLEWRITE_MAGIC
+ TRX_SYS_DOUBLEWRITE_REPEAT,
TRX_SYS_DOUBLEWRITE_MAGIC_N,
MLOG_4BYTES, &mtr);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED,
TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED_N,
MLOG_4BYTES, &mtr);
mtr_commit(&mtr);
/* Flush the modified pages to disk and make a checkpoint */
log_make_checkpoint_at(IB_ULONGLONG_MAX, TRUE);
fprintf(stderr, "InnoDB: Doublewrite buffer created\n");
trx_sys_multiple_tablespace_format = TRUE;
goto start_again;
}
if (srv_doublewrite_file) {
/* the same doublewrite buffer to TRX_SYS_SPACE should exist.
check and create if not exist.*/
mtr_start(&mtr);
trx_doublewrite_buf_is_being_created = TRUE;
block = buf_page_get(TRX_DOUBLEWRITE_SPACE, 0, TRX_SYS_PAGE_NO,
RW_X_LATCH, &mtr);
buf_block_dbg_add_level(block, SYNC_NO_ORDER_CHECK);
doublewrite = buf_block_get_frame(block) + TRX_SYS_DOUBLEWRITE;
if (mach_read_from_4(doublewrite + TRX_SYS_DOUBLEWRITE_MAGIC)
== TRX_SYS_DOUBLEWRITE_MAGIC_N) {
/* The doublewrite buffer has already been created:
just read in some numbers */
trx_doublewrite_init(doublewrite);
mtr_commit(&mtr);
trx_doublewrite_buf_is_being_created = FALSE;
} else {
fprintf(stderr,
"InnoDB: Doublewrite buffer not found in the doublewrite file:"
" creating new doublewrite buffer.\n");
if (buf_pool_get_curr_size()
< ((2 * TRX_SYS_DOUBLEWRITE_BLOCK_SIZE
+ FSP_EXTENT_SIZE / 2 + 100)
* UNIV_PAGE_SIZE)) {
fprintf(stderr,
"InnoDB: Cannot create the doublewrite buffer:"
" You must\n"
"InnoDB: increase your buffer pool size.\n"
"InnoDB: Cannot continue processing.\n");
exit(1);
}
block2 = fseg_create(TRX_DOUBLEWRITE_SPACE, TRX_SYS_PAGE_NO,
TRX_SYS_DOUBLEWRITE
+ TRX_SYS_DOUBLEWRITE_FSEG, &mtr);
/* fseg_create acquires a second latch on the page,
therefore we must declare it: */
buf_block_dbg_add_level(block2, SYNC_NO_ORDER_CHECK);
if (block2 == NULL) {
fprintf(stderr,
"InnoDB: Cannot create the doublewrite buffer:"
" You must\n"
"InnoDB: increase your tablespace size.\n"
"InnoDB: Cannot continue processing.\n");
/* We exit without committing the mtr to prevent
its modifications to the database getting to disk */
exit(1);
}
fseg_header = buf_block_get_frame(block)
+ TRX_SYS_DOUBLEWRITE + TRX_SYS_DOUBLEWRITE_FSEG;
prev_page_no = 0;
for (i = 0; i < 2 * TRX_SYS_DOUBLEWRITE_BLOCK_SIZE
+ FSP_EXTENT_SIZE / 2; i++) {
new_block = fseg_alloc_free_page(
fseg_header, prev_page_no + 1, FSP_UP, &mtr);
if (new_block == NULL) {
fprintf(stderr,
"InnoDB: Cannot create doublewrite"
" buffer: you must\n"
"InnoDB: increase your"
" tablespace size.\n"
"InnoDB: Cannot continue operation.\n"
);
exit(1);
}
/* We read the allocated pages to the buffer pool;
when they are written to disk in a flush, the space
id and page number fields are also written to the
pages. When we at database startup read pages
from the doublewrite buffer, we know that if the
space id and page number in them are the same as
the page position in the tablespace, then the page
has not been written to in doublewrite. */
ut_ad(rw_lock_get_x_lock_count(&new_block->lock) == 1);
page_no = buf_block_get_page_no(new_block);
if (i == FSP_EXTENT_SIZE / 2) {
ut_a(page_no == FSP_EXTENT_SIZE);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_BLOCK1,
page_no, MLOG_4BYTES, &mtr);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_REPEAT
+ TRX_SYS_DOUBLEWRITE_BLOCK1,
page_no, MLOG_4BYTES, &mtr);
} else if (i == FSP_EXTENT_SIZE / 2
+ TRX_SYS_DOUBLEWRITE_BLOCK_SIZE) {
ut_a(page_no == 2 * FSP_EXTENT_SIZE);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_BLOCK2,
page_no, MLOG_4BYTES, &mtr);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_REPEAT
+ TRX_SYS_DOUBLEWRITE_BLOCK2,
page_no, MLOG_4BYTES, &mtr);
} else if (i > FSP_EXTENT_SIZE / 2) {
ut_a(page_no == prev_page_no + 1);
}
prev_page_no = page_no;
}
mlog_write_ulint(doublewrite + TRX_SYS_DOUBLEWRITE_MAGIC,
TRX_SYS_DOUBLEWRITE_MAGIC_N,
MLOG_4BYTES, &mtr);
mlog_write_ulint(doublewrite + TRX_SYS_DOUBLEWRITE_MAGIC
+ TRX_SYS_DOUBLEWRITE_REPEAT,
TRX_SYS_DOUBLEWRITE_MAGIC_N,
MLOG_4BYTES, &mtr);
mlog_write_ulint(doublewrite
+ TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED,
TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED_N,
MLOG_4BYTES, &mtr);
mtr_commit(&mtr);
/* Flush the modified pages to disk and make a checkpoint */
log_make_checkpoint_at(IB_ULONGLONG_MAX, TRUE);
fprintf(stderr, "InnoDB: Doublewrite buffer created in the doublewrite file\n");
trx_sys_multiple_tablespace_format = TRUE;
}
trx_doublewrite_buf_is_being_created = FALSE;
}
}
/****************************************************************//**
At a database startup initializes the doublewrite buffer memory structure if
we already have a doublewrite buffer created in the data files. If we are
upgrading to an InnoDB version which supports multiple tablespaces, then this
function performs the necessary update operations. If we are in a crash
recovery, this function uses a possible doublewrite buffer to restore
half-written pages in the data files. */
UNIV_INTERN
void
trx_sys_doublewrite_init_or_restore_pages(
/*======================================*/
ibool restore_corrupt_pages) /*!< in: TRUE=restore pages */
{
byte* buf;
byte* read_buf;
byte* unaligned_read_buf;
ulint block1;
ulint block2;
ulint source_page_no;
byte* page;
byte* doublewrite;
ulint doublewrite_space_id;
ulint space_id;
ulint page_no;
ulint i;
doublewrite_space_id = (srv_doublewrite_file ? TRX_DOUBLEWRITE_SPACE : TRX_SYS_SPACE);
if (srv_doublewrite_file) {
fprintf(stderr,
"InnoDB: doublewrite file '%s' is used.\n",
srv_doublewrite_file);
}
/* We do the file i/o past the buffer pool */
unaligned_read_buf = ut_malloc(2 * UNIV_PAGE_SIZE);
read_buf = ut_align(unaligned_read_buf, UNIV_PAGE_SIZE);
/* Read the trx sys header to check if we are using the doublewrite
buffer */
fil_io(OS_FILE_READ, TRUE, doublewrite_space_id, 0, TRX_SYS_PAGE_NO, 0,
UNIV_PAGE_SIZE, read_buf, NULL);
doublewrite = read_buf + TRX_SYS_DOUBLEWRITE;
if (mach_read_from_4(doublewrite + TRX_SYS_DOUBLEWRITE_MAGIC)
== TRX_SYS_DOUBLEWRITE_MAGIC_N) {
/* The doublewrite buffer has been created */
trx_doublewrite_init(doublewrite);
block1 = trx_doublewrite->block1;
block2 = trx_doublewrite->block2;
buf = trx_doublewrite->write_buf;
} else {
goto leave_func;
}
if (mach_read_from_4(doublewrite + TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED)
!= TRX_SYS_DOUBLEWRITE_SPACE_ID_STORED_N) {
/* We are upgrading from a version < 4.1.x to a version where
multiple tablespaces are supported. We must reset the space id
field in the pages in the doublewrite buffer because starting
from this version the space id is stored to
FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID. */
trx_doublewrite_must_reset_space_ids = TRUE;
fprintf(stderr,
"InnoDB: Resetting space id's in the"
" doublewrite buffer\n");
} else {
trx_sys_multiple_tablespace_format = TRUE;
}
/* Read the pages from the doublewrite buffer to memory */
fil_io(OS_FILE_READ, TRUE, doublewrite_space_id, 0, block1, 0,
TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * UNIV_PAGE_SIZE,
buf, NULL);
fil_io(OS_FILE_READ, TRUE, doublewrite_space_id, 0, block2, 0,
TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * UNIV_PAGE_SIZE,
buf + TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * UNIV_PAGE_SIZE,
NULL);
/* Check if any of these pages is half-written in data files, in the
intended position */
page = buf;
for (i = 0; i < TRX_SYS_DOUBLEWRITE_BLOCK_SIZE * 2; i++) {
page_no = mach_read_from_4(page + FIL_PAGE_OFFSET);
if (trx_doublewrite_must_reset_space_ids) {
space_id = 0;
mach_write_to_4(page
+ FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID, 0);
/* We do not need to calculate new checksums for the
pages because the field .._SPACE_ID does not affect
them. Write the page back to where we read it from. */
if (i < TRX_SYS_DOUBLEWRITE_BLOCK_SIZE) {
source_page_no = block1 + i;
} else {
source_page_no = block2
+ i - TRX_SYS_DOUBLEWRITE_BLOCK_SIZE;
}
fil_io(OS_FILE_WRITE, TRUE, 0, 0, source_page_no, 0,
UNIV_PAGE_SIZE, page, NULL);
/* printf("Resetting space id in page %lu\n",
source_page_no); */
} else {
space_id = mach_read_from_4(
page + FIL_PAGE_ARCH_LOG_NO_OR_SPACE_ID);
}
if (!restore_corrupt_pages) {
/* The database was shut down gracefully: no need to
restore pages */
} else if (!fil_tablespace_exists_in_mem(space_id)) {
/* Maybe we have dropped the single-table tablespace
and this page once belonged to it: do nothing */
} else if (!fil_check_adress_in_tablespace(space_id,
page_no)) {
fprintf(stderr,
"InnoDB: Warning: a page in the"
" doublewrite buffer is not within space\n"
"InnoDB: bounds; space id %lu"
" page number %lu, page %lu in"
" doublewrite buf.\n",
(ulong) space_id, (ulong) page_no, (ulong) i);
} else if ((space_id == TRX_SYS_SPACE
|| (srv_doublewrite_file && space_id == TRX_DOUBLEWRITE_SPACE))
&& ((page_no >= block1
&& page_no
< block1 + TRX_SYS_DOUBLEWRITE_BLOCK_SIZE)
|| (page_no >= block2
&& page_no
< (block2
+ TRX_SYS_DOUBLEWRITE_BLOCK_SIZE)))) {
/* It is an unwritten doublewrite buffer page:
do nothing */
} else {
ulint zip_size = fil_space_get_zip_size(space_id);
/* Read in the actual page from the file */
fil_io(OS_FILE_READ, TRUE, space_id, zip_size,
page_no, 0,
zip_size ? zip_size : UNIV_PAGE_SIZE,
read_buf, NULL);
if (srv_recovery_stats && recv_recovery_is_on()) {
mutex_enter(&(recv_sys->mutex));
recv_sys->stats_doublewrite_check_pages++;
mutex_exit(&(recv_sys->mutex));
}
/* Check if the page is corrupt */
if (UNIV_UNLIKELY
(buf_page_is_corrupted(
TRUE, read_buf, zip_size))) {
fprintf(stderr,
"InnoDB: Database page"
" corruption or a failed\n"
"InnoDB: file read of"
" space %lu page %lu.\n"
"InnoDB: Trying to recover it from"
" the doublewrite buffer.\n",
(ulong) space_id, (ulong) page_no);
if (buf_page_is_corrupted(
TRUE, page, zip_size)) {
fprintf(stderr,
"InnoDB: Dump of the page:\n");
buf_page_print(
read_buf, zip_size,
BUF_PAGE_PRINT_NO_CRASH);
fprintf(stderr,
"InnoDB: Dump of"
" corresponding page"
" in doublewrite buffer:\n");
buf_page_print(
page, zip_size,
BUF_PAGE_PRINT_NO_CRASH);
fprintf(stderr,
"InnoDB: Also the page in the"
" doublewrite buffer"
" is corrupt.\n"
"InnoDB: Cannot continue"
" operation.\n"
"InnoDB: You can try to"
" recover the database"
" with the my.cnf\n"
"InnoDB: option:\n"
"InnoDB:"
" innodb_force_recovery=6\n");
ut_error;
}
/* Write the good page from the
doublewrite buffer to the intended
position */
fil_io(OS_FILE_WRITE, TRUE, space_id,
zip_size, page_no, 0,
zip_size ? zip_size : UNIV_PAGE_SIZE,
page, NULL);
if (srv_recovery_stats && recv_recovery_is_on()) {
mutex_enter(&(recv_sys->mutex));
recv_sys->stats_doublewrite_overwrite_pages++;
mutex_exit(&(recv_sys->mutex));
}
fprintf(stderr,
"InnoDB: Recovered the page from"
" the doublewrite buffer.\n");
}
}
page += UNIV_PAGE_SIZE;
}
fil_flush_file_spaces(FIL_TABLESPACE);
leave_func:
ut_free(unaligned_read_buf);
}
/****************************************************************//**
Checks that trx is in the trx list.
@return TRUE if is in */
UNIV_INTERN
ibool
trx_in_trx_list(
/*============*/
trx_t* in_trx) /*!< in: trx */
{
trx_t* trx;
ut_ad(mutex_own(&(kernel_mutex)));
trx = UT_LIST_GET_FIRST(trx_sys->trx_list);
while (trx != NULL) {
if (trx == in_trx) {
return(TRUE);
}
trx = UT_LIST_GET_NEXT(trx_list, trx);
}
return(FALSE);
}
/*****************************************************************//**
Writes the value of max_trx_id to the file based trx system header. */
UNIV_INTERN
void
trx_sys_flush_max_trx_id(void)
/*==========================*/
{
trx_sysf_t* sys_header;
mtr_t mtr;
ut_ad(mutex_own(&kernel_mutex));
mtr_start(&mtr);
sys_header = trx_sysf_get(&mtr);
mlog_write_ull(sys_header + TRX_SYS_TRX_ID_STORE,
trx_sys->max_trx_id, &mtr);
mtr_commit(&mtr);
}
/*****************************************************************//**
Updates the offset information about the end of the MySQL binlog entry
which corresponds to the transaction just being committed. In a MySQL
replication slave updates the latest master binlog position up to which
replication has proceeded. */
UNIV_INTERN
void
trx_sys_update_mysql_binlog_offset(
/*===============================*/
trx_sysf_t* sys_header,
const char* file_name_in,/*!< in: MySQL log file name */
ib_int64_t offset, /*!< in: position in that log file */
ulint field, /*!< in: offset of the MySQL log info field in
the trx sys header */
mtr_t* mtr) /*!< in: mtr */
{
const char* file_name;
if (ut_strlen(file_name_in) >= TRX_SYS_MYSQL_MASTER_LOG_NAME_LEN) {
/* We cannot fit the name to the 512 bytes we have reserved */
/* -> To store relay log file information, file_name must fit to the 480 bytes */
file_name = "";
} else {
file_name = file_name_in;
}
if (mach_read_from_4(sys_header + field
+ TRX_SYS_MYSQL_LOG_MAGIC_N_FLD)
!= TRX_SYS_MYSQL_LOG_MAGIC_N) {
mlog_write_ulint(sys_header + field
+ TRX_SYS_MYSQL_LOG_MAGIC_N_FLD,
TRX_SYS_MYSQL_LOG_MAGIC_N,
MLOG_4BYTES, mtr);
}
if (0 != strcmp((char*) (sys_header + field + TRX_SYS_MYSQL_LOG_NAME),
file_name)) {
mlog_write_string(sys_header + field
+ TRX_SYS_MYSQL_LOG_NAME,
(byte*) file_name, 1 + ut_strlen(file_name),
mtr);
}
if (mach_read_from_4(sys_header + field
+ TRX_SYS_MYSQL_LOG_OFFSET_HIGH) > 0
|| (offset >> 32) > 0) {
mlog_write_ulint(sys_header + field
+ TRX_SYS_MYSQL_LOG_OFFSET_HIGH,
(ulint)(offset >> 32),
MLOG_4BYTES, mtr);
}
mlog_write_ulint(sys_header + field
+ TRX_SYS_MYSQL_LOG_OFFSET_LOW,
(ulint)(offset & 0xFFFFFFFFUL),
MLOG_4BYTES, mtr);
}
/*****************************************************************//**
Stores the MySQL binlog offset info in the trx system header if
the magic number shows it valid, and print the info to stderr */
UNIV_INTERN
void
trx_sys_print_mysql_binlog_offset(void)
/*===================================*/
{
trx_sysf_t* sys_header;
mtr_t mtr;
ulint trx_sys_mysql_bin_log_pos_high;
ulint trx_sys_mysql_bin_log_pos_low;
mtr_start(&mtr);
sys_header = trx_sysf_get(&mtr);
if (mach_read_from_4(sys_header + TRX_SYS_MYSQL_LOG_INFO
+ TRX_SYS_MYSQL_LOG_MAGIC_N_FLD)
!= TRX_SYS_MYSQL_LOG_MAGIC_N) {
mtr_commit(&mtr);
return;
}
trx_sys_mysql_bin_log_pos_high = mach_read_from_4(
sys_header + TRX_SYS_MYSQL_LOG_INFO
+ TRX_SYS_MYSQL_LOG_OFFSET_HIGH);
trx_sys_mysql_bin_log_pos_low = mach_read_from_4(
sys_header + TRX_SYS_MYSQL_LOG_INFO
+ TRX_SYS_MYSQL_LOG_OFFSET_LOW);
trx_sys_mysql_bin_log_pos
= (((ib_int64_t)trx_sys_mysql_bin_log_pos_high) << 32)
+ (ib_int64_t)trx_sys_mysql_bin_log_pos_low;
ut_memcpy(trx_sys_mysql_bin_log_name,
sys_header + TRX_SYS_MYSQL_LOG_INFO
+ TRX_SYS_MYSQL_LOG_NAME, TRX_SYS_MYSQL_LOG_NAME_LEN);
fprintf(stderr,
"InnoDB: Last MySQL binlog file position %lu %lu,"
" file name %s\n",
trx_sys_mysql_bin_log_pos_high, trx_sys_mysql_bin_log_pos_low,
trx_sys_mysql_bin_log_name);
mtr_commit(&mtr);
}
/*****************************************************************//**
Reads the log coordinates at the given offset in the trx sys header. */
static
void
trx_sys_read_log_pos(
/*=================*/
const trx_sysf_t* sys_header, /*!< in: the trx sys header */
uint header_offset, /*!< in: coord offset in the
header */
char* log_fn, /*!< out: the log file name */
ib_int64_t* log_pos) /*!< out: the log poistion */
{
ut_memcpy(log_fn, sys_header + header_offset + TRX_SYS_MYSQL_LOG_NAME,
TRX_SYS_MYSQL_MASTER_LOG_NAME_LEN);
*log_pos =
(((ib_int64_t)mach_read_from_4(sys_header + header_offset
+ TRX_SYS_MYSQL_LOG_OFFSET_HIGH)) << 32)
+ mach_read_from_4(sys_header + header_offset
+ TRX_SYS_MYSQL_LOG_OFFSET_LOW);
}
/*****************************************************************//**
Prints to stderr the MySQL master log offset info in the trx system header
PREPARE set of fields if the magic number shows it valid and stores it
in global variables. */
UNIV_INTERN
void
trx_sys_print_mysql_master_log_pos(void)
/*====================================*/
{
trx_sysf_t* sys_header;
mtr_t mtr;
mtr_start(&mtr);
sys_header = trx_sysf_get(&mtr);