SQLite

Check-in [383eb87bbf]
Login

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Add file test_quota.c, demonstrating how file-system quotas may be implemented as a VFS wrapper.
Downloads: Tarball | ZIP archive
Timelines: family | ancestors | descendants | both | experimental
Files: files | file ages | folders
SHA1: 383eb87bbf560b20682dd5be0e18ddadf762f415
User & Date: dan 2010-09-01 11:40:05.000
Context
2010-09-01
12:50
Update the quota shim so that when the same file is opened multiple times, its size only counts against the quota once. (check-in: f5d2638030 user: drh tags: experimental)
11:40
Add file test_quota.c, demonstrating how file-system quotas may be implemented as a VFS wrapper. (check-in: 383eb87bbf user: dan tags: experimental)
02:38
Fix some compiler warnings under MSVC. (check-in: afdc82a99e user: shaneh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to main.mk.
241
242
243
244
245
246
247

248
249
250
251
252
253
254
  $(TOP)/src/test_intarray.c \
  $(TOP)/src/test_journal.c \
  $(TOP)/src/test_malloc.c \
  $(TOP)/src/test_mutex.c \
  $(TOP)/src/test_onefile.c \
  $(TOP)/src/test_osinst.c \
  $(TOP)/src/test_pcache.c \

  $(TOP)/src/test_rtree.c \
  $(TOP)/src/test_schema.c \
  $(TOP)/src/test_server.c \
  $(TOP)/src/test_stat.c \
  $(TOP)/src/test_tclvar.c \
  $(TOP)/src/test_thread.c \
  $(TOP)/src/test_vfs.c \







>







241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
  $(TOP)/src/test_intarray.c \
  $(TOP)/src/test_journal.c \
  $(TOP)/src/test_malloc.c \
  $(TOP)/src/test_mutex.c \
  $(TOP)/src/test_onefile.c \
  $(TOP)/src/test_osinst.c \
  $(TOP)/src/test_pcache.c \
  $(TOP)/src/test_quota.c \
  $(TOP)/src/test_rtree.c \
  $(TOP)/src/test_schema.c \
  $(TOP)/src/test_server.c \
  $(TOP)/src/test_stat.c \
  $(TOP)/src/test_tclvar.c \
  $(TOP)/src/test_thread.c \
  $(TOP)/src/test_vfs.c \
Changes to src/tclsqlite.c.
3573
3574
3575
3576
3577
3578
3579

3580
3581
3582
3583
3584
3585
3586
    extern int SqlitetestOnefile_Init();
    extern int SqlitetestOsinst_Init(Tcl_Interp*);
    extern int Sqlitetestbackup_Init(Tcl_Interp*);
    extern int Sqlitetestintarray_Init(Tcl_Interp*);
    extern int Sqlitetestvfs_Init(Tcl_Interp *);
    extern int SqlitetestStat_Init(Tcl_Interp*);
    extern int Sqlitetestrtree_Init(Tcl_Interp*);


    Sqliteconfig_Init(interp);
    Sqlitetest1_Init(interp);
    Sqlitetest2_Init(interp);
    Sqlitetest3_Init(interp);
    Sqlitetest4_Init(interp);
    Sqlitetest5_Init(interp);







>







3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
    extern int SqlitetestOnefile_Init();
    extern int SqlitetestOsinst_Init(Tcl_Interp*);
    extern int Sqlitetestbackup_Init(Tcl_Interp*);
    extern int Sqlitetestintarray_Init(Tcl_Interp*);
    extern int Sqlitetestvfs_Init(Tcl_Interp *);
    extern int SqlitetestStat_Init(Tcl_Interp*);
    extern int Sqlitetestrtree_Init(Tcl_Interp*);
    extern int Sqlitequota_Init(Tcl_Interp*);

    Sqliteconfig_Init(interp);
    Sqlitetest1_Init(interp);
    Sqlitetest2_Init(interp);
    Sqlitetest3_Init(interp);
    Sqlitetest4_Init(interp);
    Sqlitetest5_Init(interp);
3602
3603
3604
3605
3606
3607
3608

3609
3610
3611
3612
3613
3614
3615
    SqlitetestOnefile_Init(interp);
    SqlitetestOsinst_Init(interp);
    Sqlitetestbackup_Init(interp);
    Sqlitetestintarray_Init(interp);
    Sqlitetestvfs_Init(interp);
    SqlitetestStat_Init(interp);
    Sqlitetestrtree_Init(interp);


    Tcl_CreateObjCommand(interp,"load_testfixture_extensions",init_all_cmd,0,0);

#ifdef SQLITE_SSE
    Sqlitetestsse_Init(interp);
#endif
  }







>







3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
    SqlitetestOnefile_Init(interp);
    SqlitetestOsinst_Init(interp);
    Sqlitetestbackup_Init(interp);
    Sqlitetestintarray_Init(interp);
    Sqlitetestvfs_Init(interp);
    SqlitetestStat_Init(interp);
    Sqlitetestrtree_Init(interp);
    Sqlitequota_Init(interp);

    Tcl_CreateObjCommand(interp,"load_testfixture_extensions",init_all_cmd,0,0);

#ifdef SQLITE_SSE
    Sqlitetestsse_Init(interp);
#endif
  }
Added src/test_quota.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
/*
** 2010 September 31
**
** The author disclaims copyright to this source code.  In place of
** a legal notice, here is a blessing:
**
**    May you do good and not evil.
**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
**
** This file contains a VFS "shim" - a layer that sits in between the
** pager and the real VFS.
**
** This particular shim enforces a quota system on files.  One or more
** database files are in a "quota group" that is defined by a GLOB
** pattern.  A quota is set for the combined size of all files in the
** the group.  A quota of zero means "no limit".  If the total size
** of all files in the quota group is met or exceeded, then new
** write requests that attempt to enlarge a file fail with SQLITE_FULL.
**
** However, before returning SQLITE_FULL, the write requests invoke
** a callback function that is configurable for each quota group.
** This callback has the opportunity to enlarge the quota.  If the
** callback does enlarge the quota such that the total size of all
** files within the group is less than the new quota, then the write
** continues as if nothing had happened.
*/
#include "sqlite3.h"
#include <string.h>
#include <assert.h>

/************************ Object Definitions ******************************/

/*
** This module contains a table of filename patterns that have size
** quotas.  The quota applies to the sum of the sizes of all open
** database files whose names match the GLOB pattern.
**
** Each quota is an instance of the following object.  Quotas must
** be established (using sqlite3_quota_set()) prior to opening any
** of the database connections that access files governed by the
** quota.
**
** Each entry in the quota table is an instance of the following object.
*/
typedef struct quotaGroup quotaGroup;
struct quotaGroup {
  const char *zPattern;          /* Filename pattern to be quotaed */
  sqlite3_int64 iLimit;          /* Upper bound on total file size */
  sqlite3_int64 iSize;           /* Current size of all files */
  void (*xCallback)(             /* Callback invoked when going over quota */
     const char *zFilename,         /* Name of file whose size increases */
     sqlite3_int64 *piLimit,        /* IN/OUT: The current limit */
     sqlite3_int64 iSize,           /* Total size of all files in the group */
     void *pArg                     /* Client data */
  );
  void *pArg;                    /* Third argument to the xCallback() */
  int nRef;                      /* Number of files in the group references. */
  quotaGroup *pNext, **ppPrev;   /* Doubly linked list of all quota objects */
};

/*
** An instance of the following object represents each file that
** participates in quota tracking.  The sqlite3_file object for the
** underlying VFS is appended to this structure.
*/
typedef struct quotaFile quotaFile;
struct quotaFile {
  sqlite3_file base;              /* Base class - must be first */
  const char *zFilename;          /* Name of this file */
  quotaGroup *pGroup;             /* Upper bound on file size */
  sqlite3_int64 iSize;            /* Current size of this file */
  /* The underlying VFS sqlite3_file is appended to this object */
};

/************************* Global Variables **********************************/
/*
** All global variables used by this file are containing within the following
** gQuota structure.
*/
static struct {
  /* The pOrigVfs is a pointer to the real underlying VFS implementation.
  ** Most operations pass-through to the real VFS.  This value is read-only
  ** during operation.  It is only modified at start-time and thus does not
  ** require a mutex.
  */
  sqlite3_vfs *pOrigVfs;

  /* The sThisVfs is the VFS structure used by this shim.  It is initialized
  ** at start-time and thus does not require a mutex
  */
  sqlite3_vfs sThisVfs;

  /* The sIoMethods defines the methods used by sqlite3_file objects 
  ** associated with this shim.  It is initialized at start-time and does
  ** not require a mutex.
  **
  ** When the underlying VFS is called to open a file, it might return 
  ** either a version 1 or a version 2 sqlite3_file object.  This shim
  ** has to create a wrapper sqlite3_file of the same version.  Hence
  ** there are two I/O method structures, one for version 1 and the other
  ** for version 2.
  */
  sqlite3_io_methods sIoMethodsV1;
  sqlite3_io_methods sIoMethodsV2;

  /* True when this shim as been initialized.
  */
  int isInitialized;

  /* For run-time access any of the other global data structures in this
  ** shim, the following mutex must be held.
  */
  sqlite3_mutex *pMutex;

  /* List of quotaGroup objects.
  */
  quotaGroup *pGroup;

} gQuota;

/************************* Utility Routines *********************************/
/*
** Acquire and release the mutex used to serialize access to the
** list of quotaGroups.
*/
static void quotaEnter(void){ sqlite3_mutex_enter(gQuota.pMutex); }
static void quotaLeave(void){ sqlite3_mutex_leave(gQuota.pMutex); }


/* If the reference count and threshold for a quotaGroup are both
** zero, then destroy the quotaGroup.
*/
static void quotaGroupDeref(quotaGroup *p){
  if( p->nRef==0 && p->iLimit==0 ){
    if( p->pNext ) p->pNext->ppPrev = p->ppPrev;
    if( p->ppPrev ) *p->ppPrev = p->pNext;
    sqlite3_free(p);
  }
}

/*
** Return TRUE if string z matches glob pattern zGlob.
**
** Globbing rules:
**
**      '*'       Matches any sequence of zero or more characters.
**
**      '?'       Matches exactly one character.
**
**     [...]      Matches one character from the enclosed list of
**                characters.
**
**     [^...]     Matches one character not in the enclosed list.
**
*/
static int strglob(const char *zGlob, const char *z){
  int c, c2;
  int invert;
  int seen;

  while( (c = (*(zGlob++)))!=0 ){
    if( c=='*' ){
      while( (c=(*(zGlob++))) == '*' || c=='?' ){
        if( c=='?' && (*(z++))==0 ) return 0;
      }
      if( c==0 ){
        return 1;
      }else if( c=='[' ){
        while( *z && strglob(zGlob-1,z)==0 ){
          z++;
        }
        return (*z)!=0;
      }
      while( (c2 = (*(z++)))!=0 ){
        while( c2!=c ){
          c2 = *(z++);
          if( c2==0 ) return 0;
        }
        if( strglob(zGlob,z) ) return 1;
      }
      return 0;
    }else if( c=='?' ){
      if( (*(z++))==0 ) return 0;
    }else if( c=='[' ){
      int prior_c = 0;
      seen = 0;
      invert = 0;
      c = *(z++);
      if( c==0 ) return 0;
      c2 = *(zGlob++);
      if( c2=='^' ){
        invert = 1;
        c2 = *(zGlob++);
      }
      if( c2==']' ){
        if( c==']' ) seen = 1;
        c2 = *(zGlob++);
      }
      while( c2 && c2!=']' ){
        if( c2=='-' && zGlob[0]!=']' && zGlob[0]!=0 && prior_c>0 ){
          c2 = *(zGlob++);
          if( c>=prior_c && c<=c2 ) seen = 1;
          prior_c = 0;
        }else{
          if( c==c2 ){
            seen = 1;
          }
          prior_c = c2;
        }
        c2 = *(zGlob++);
      }
      if( c2==0 || (seen ^ invert)==0 ) return 0;
    }else{
      if( c!=(*(z++)) ) return 0;
    }
  }
  return *z==0;
}


/* Find a quotaGroup given the filename.
**
** Return a pointer to the quotaFile object. Return NULL if not found.
*/
static quotaGroup *quotaGroupFind(const char *zFilename){
  quotaGroup *p;
  for(p=gQuota.pGroup; p && strglob(p->zPattern, zFilename)==0; p=p->pNext){}
  return p;
}

/* Translate an sqlite3_file* that is really a quotaFile* into
** an sqlite3_file* for the underlying original VFS.
*/
static sqlite3_file *quotaSubFile(sqlite3_file *pFile){
  quotaFile *p = (quotaFile*)pFile;
  return (sqlite3_file*)&p[1];
}

/************************* VFS Method Wrappers *****************************/
/*
** This is the xOpen method used for the "quota" VFS.
**
** Most of the work is done by the underlying original VFS.  This method
** simply links the new file into the quota group if it is a file that
** needs to be tracked.
*/
static int quotaOpen(
  sqlite3_vfs *pVfs,
  const char *zName,
  sqlite3_file *pFile,
  int flags,
  int *pOutFlags
){
  int rc;
  quotaFile *pQuotaFile;
  quotaGroup *pGroup;
  sqlite3_file *pSubFile;
  sqlite3_vfs *pOrigVfs = gQuota.pOrigVfs;

  /* If the file is not a main database file or a WAL, then use the
  ** normal xOpen method.
  */
  if( (flags & (SQLITE_OPEN_MAIN_DB|SQLITE_OPEN_WAL))==0 ){
    return pOrigVfs->xOpen(pOrigVfs, zName, pFile, flags, pOutFlags);
  }

  /* If the name of the file does not match any quota group, then
  ** use the normal xOpen method.
  */
  quotaEnter();
  pGroup = quotaGroupFind(zName);
  if( pGroup==0 ){
    rc = pOrigVfs->xOpen(pOrigVfs, zName, pFile, flags, pOutFlags);
  }else{
    /* If we get to this point, it means the file needs to be quota tracked.
    */
    pQuotaFile = (quotaFile*)pFile;
    pSubFile = quotaSubFile(pFile);
    rc = pOrigVfs->xOpen(pOrigVfs, zName, pSubFile, flags, pOutFlags);
    if( rc==SQLITE_OK ){
      pQuotaFile->iSize = 0;
      pQuotaFile->pGroup = pGroup;
      pGroup->nRef++;
      pQuotaFile->zFilename = zName;
      if( pSubFile->pMethods->iVersion==1 ){
        pQuotaFile->base.pMethods = &gQuota.sIoMethodsV1;
      }else{
        pQuotaFile->base.pMethods = &gQuota.sIoMethodsV2;
      }
    }
  }
  quotaLeave();
  return rc;
}

/************************ I/O Method Wrappers *******************************/

/* xClose requests get passed through to the original VFS.  But we
** also have to unlink the quotaFile from the quotaGroup.
*/
static int quotaClose(sqlite3_file *pFile){
  quotaFile *p = (quotaFile*)pFile;
  quotaGroup *pGroup = p->pGroup;
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  int rc;
  rc = pSubFile->pMethods->xClose(pSubFile);
  quotaEnter();
  pGroup->nRef--;
  pGroup->iSize -= p->iSize;
  quotaGroupDeref(pGroup);
  quotaLeave();
  return rc;
}

/* Pass xRead requests directory thru to the original VFS without
** further processing.
*/
static int quotaRead(
  sqlite3_file *pFile,
  void *pBuf,
  int iAmt,
  sqlite3_int64 iOfst
){
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  return pSubFile->pMethods->xRead(pSubFile, pBuf, iAmt, iOfst);
}

/* Check xWrite requests to see if they expand the file.  If they do,
** the perform a quota check before passing them through to the
** original VFS.
*/
static int quotaWrite(
  sqlite3_file *pFile,
  const void *pBuf,
  int iAmt,
  sqlite3_int64 iOfst
){
  quotaFile *p = (quotaFile*)pFile;
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  sqlite3_int64 iEnd = iOfst+iAmt;
  quotaGroup *pGroup;
  sqlite3_int64 szNew;

  if( p->iSize<iEnd ){
    pGroup = p->pGroup;
    quotaEnter();
    szNew = pGroup->iSize - p->iSize + iEnd;
    if( szNew>pGroup->iLimit && pGroup->iLimit>0 ){
      if( pGroup->xCallback ){
        pGroup->xCallback(p->zFilename, &pGroup->iLimit, szNew, 
                          pGroup->pArg);
      }
      if( szNew>pGroup->iLimit && pGroup->iLimit>0 ){
        quotaLeave();
        return SQLITE_FULL;
      }
    }
    pGroup->iSize = szNew;
    p->iSize = iEnd;
    quotaLeave();
  }
  return pSubFile->pMethods->xWrite(pSubFile, pBuf, iAmt, iOfst);
}

/* Pass xTruncate requests thru to the original VFS.  If the
** success, update the file size.
*/
static int quotaTruncate(sqlite3_file *pFile, sqlite3_int64 size){
  quotaFile *p = (quotaFile*)pFile;
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  int rc = pSubFile->pMethods->xTruncate(pSubFile, size);
  quotaGroup *pGroup = p->pGroup;
  if( rc==SQLITE_OK ){
    quotaEnter();
    pGroup->iSize -= p->iSize;
    p->iSize = size;
    pGroup->iSize += size;
    quotaLeave();
  }
  return rc;
}

/* Pass xSync requests through to the original VFS without change
*/
static int quotaSync(sqlite3_file *pFile, int flags){
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  return pSubFile->pMethods->xSync(pSubFile, flags);
}

/* Pass xFileSize requests through to the original VFS but then
** update the quotaGroup with the new size before returning.
*/
static int quotaFileSize(sqlite3_file *pFile, sqlite3_int64 *pSize){
  quotaFile *p = (quotaFile*)pFile;
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  quotaGroup *pGroup;
  sqlite3_int64 sz;
  int rc;

  rc = pSubFile->pMethods->xFileSize(pSubFile, &sz);
  if( rc==SQLITE_OK ){
    pGroup = p->pGroup;
    quotaEnter();
    pGroup->iSize -= p->iSize;
    p->iSize = sz;
    pGroup->iSize += sz;
    quotaLeave();
    *pSize = sz;
  }
  return rc;
}

/* Pass xLock requests through to the original VFS unchanged.
*/
static int quotaLock(sqlite3_file *pFile, int lock){
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  return pSubFile->pMethods->xLock(pSubFile, lock);
}

/* Pass xUnlock requests through to the original VFS unchanged.
*/
static int quotaUnlock(sqlite3_file *pFile, int lock){
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  return pSubFile->pMethods->xUnlock(pSubFile, lock);
}

/* Pass xCheckReservedLock requests through to the original VFS unchanged.
*/
static int quotaCheckReservedLock(sqlite3_file *pFile, int *pResOut){
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  return pSubFile->pMethods->xCheckReservedLock(pSubFile, pResOut);
}

/* Pass xFileControl requests through to the original VFS unchanged.
*/
static int quotaFileControl(sqlite3_file *pFile, int op, void *pArg){
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  return pSubFile->pMethods->xFileControl(pSubFile, op, pArg);
}

/* Pass xSectorSize requests through to the original VFS unchanged.
*/
static int quotaSectorSize(sqlite3_file *pFile){
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  return pSubFile->pMethods->xSectorSize(pSubFile);
}

/* Pass xDeviceCharacteristics requests through to the original VFS unchanged.
*/
static int quotaDeviceCharacteristics(sqlite3_file *pFile){
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  return pSubFile->pMethods->xDeviceCharacteristics(pSubFile);
}

/* Pass xShmMap requests through to the original VFS unchanged.
*/
static int quotaShmMap(
  sqlite3_file *pFile,            /* Handle open on database file */
  int iRegion,                    /* Region to retrieve */
  int szRegion,                   /* Size of regions */
  int bExtend,                    /* True to extend file if necessary */
  void volatile **pp              /* OUT: Mapped memory */
){
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  return pSubFile->pMethods->xShmMap(pSubFile, iRegion, szRegion, bExtend, pp);
}

/* Pass xShmLock requests through to the original VFS unchanged.
*/
static int quotaShmLock(
  sqlite3_file *pFile,       /* Database file holding the shared memory */
  int ofst,                  /* First lock to acquire or release */
  int n,                     /* Number of locks to acquire or release */
  int flags                  /* What to do with the lock */
){
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  return pSubFile->pMethods->xShmLock(pSubFile, ofst, n, flags);
}

/* Pass xShmBarrier requests through to the original VFS unchanged.
*/
static void quotaShmBarrier(sqlite3_file *pFile){
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  pSubFile->pMethods->xShmBarrier(pSubFile);
}

/* Pass xShmUnmap requests through to the original VFS unchanged.
*/
static int quotaShmUnmap(sqlite3_file *pFile, int deleteFlag){
  sqlite3_file *pSubFile = quotaSubFile(pFile);
  return pSubFile->pMethods->xShmUnmap(pSubFile, deleteFlag);
}

/************************** Public Interfaces *****************************/
/*
** Initialize the quota VFS shim.  Use the VFS named zOrigVfsName
** as the VFS that does the actual work.  Use the default if
** zOrigVfsName==NULL.  
**
** The quota VFS shim is named "quota".  It will become the default
** VFS if makeDefault is non-zero.
**
** THIS ROUTINE IS NOT THREADSAFE.  Call this routine exactly once
** during start-up.
*/
int sqlite3_quota_initialize(const char *zOrigVfsName, int makeDefault){
  sqlite3_vfs *pOrigVfs;
  if( gQuota.isInitialized ) return SQLITE_MISUSE;
  pOrigVfs = sqlite3_vfs_find(zOrigVfsName);
  if( pOrigVfs==0 ) return SQLITE_ERROR;
  assert( pOrigVfs!=&gQuota.sThisVfs );
  gQuota.pMutex = sqlite3_mutex_alloc(SQLITE_MUTEX_FAST);
  if( !gQuota.pMutex ){
    return SQLITE_NOMEM;
  }
  gQuota.isInitialized = 1;
  gQuota.pOrigVfs = pOrigVfs;
  gQuota.sThisVfs = *pOrigVfs;
  gQuota.sThisVfs.xOpen = quotaOpen;
  gQuota.sThisVfs.szOsFile += sizeof(quotaFile);
  gQuota.sThisVfs.zName = "quota";
  gQuota.sIoMethodsV1.iVersion = 1;
  gQuota.sIoMethodsV1.xClose = quotaClose;
  gQuota.sIoMethodsV1.xRead = quotaRead;
  gQuota.sIoMethodsV1.xWrite = quotaWrite;
  gQuota.sIoMethodsV1.xTruncate = quotaTruncate;
  gQuota.sIoMethodsV1.xSync = quotaSync;
  gQuota.sIoMethodsV1.xFileSize = quotaFileSize;
  gQuota.sIoMethodsV1.xLock = quotaLock;
  gQuota.sIoMethodsV1.xUnlock = quotaUnlock;
  gQuota.sIoMethodsV1.xCheckReservedLock = quotaCheckReservedLock;
  gQuota.sIoMethodsV1.xFileControl = quotaFileControl;
  gQuota.sIoMethodsV1.xSectorSize = quotaSectorSize;
  gQuota.sIoMethodsV1.xDeviceCharacteristics = quotaDeviceCharacteristics;
  gQuota.sIoMethodsV2 = gQuota.sIoMethodsV1;
  gQuota.sIoMethodsV2.iVersion = 2;
  gQuota.sIoMethodsV2.xShmMap = quotaShmMap;
  gQuota.sIoMethodsV2.xShmLock = quotaShmLock;
  gQuota.sIoMethodsV2.xShmBarrier = quotaShmBarrier;
  gQuota.sIoMethodsV2.xShmUnmap = quotaShmUnmap;
  sqlite3_vfs_register(&gQuota.sThisVfs, makeDefault);
  return SQLITE_OK;
}

/*
** Shutdown the quota system.
**
** All SQLite database connections must be closed before calling this
** routine.
**
** THIS ROUTINE IS NOT THREADSAFE.  Call this routine exactly one while
** shutting down in order to free all remaining quota groups.
*/
int sqlite3_quota_shutdown(void){
  quotaGroup *p;
  if( gQuota.isInitialized==0 ) return SQLITE_MISUSE;
  for(p=gQuota.pGroup; p; p=p->pNext){
    if( p->nRef ) return SQLITE_MISUSE;
  }
  while( gQuota.pGroup ){
    quotaGroup *p = gQuota.pGroup;
    gQuota.pGroup = p->pNext;
    sqlite3_free(p);
  }
  gQuota.isInitialized = 0;
  sqlite3_mutex_free(gQuota.pMutex);
  sqlite3_vfs_unregister(&gQuota.sThisVfs);
  memset(&gQuota, 0, sizeof(gQuota));
  return SQLITE_OK;
}

/*
** Create or destroy a quota group.
**
** The quota group is defined by the zPattern.  When calling this routine
** with a zPattern for a quota group that already exists, this routine
** merely updates the iLimit, xCallback, and pArg values for that quota
** group.  If zPattern is new, then a new quota group is created.
**
** If the iLimit for a quota group is set to zero, then the quota group
** is disabled and will be deleted when the last database connection using
** the quota group is closed.
**
** Calling this routine on a zPattern that does not exist and with a
** zero iLimit is a no-op.
**
** A quota group must exist with a non-zero iLimit prior to opening
** database connections if those connections are to participate in the
** quota group.  Creating a quota group does not affect database connections
** that are already open.
*/
int sqlite3_quota_set(
  const char *zPattern,           /* The filename pattern */
  sqlite3_int64 iLimit,           /* New quota to set for this quota group */
  void (*xCallback)(              /* Callback invoked when going over quota */
     const char *zFilename,         /* Name of file whose size increases */
     sqlite3_int64 *piLimit,        /* IN/OUT: The current limit */
     sqlite3_int64 iSize,           /* Total size of all files in the group */
     void *pArg                     /* Client data */
  ),
  void *pArg                      /* client data passed thru to callback */
){
  quotaGroup *pGroup;
  quotaEnter();
  pGroup = gQuota.pGroup;
  while( pGroup && strcmp(pGroup->zPattern, zPattern)!=0 ){
    pGroup = pGroup->pNext;
  }
  if( pGroup==0 && iLimit>0 ){
    int nPattern = strlen(zPattern);
    pGroup = sqlite3_malloc( sizeof(*pGroup) + nPattern + 1 );
    if( pGroup==0 ){
      quotaLeave();
      return SQLITE_NOMEM;
    }
    memset(pGroup, 0, sizeof(*pGroup));
    pGroup->zPattern = (char*)&pGroup[1];
    memcpy((char *)pGroup->zPattern, zPattern, nPattern+1);
    if( gQuota.pGroup ) gQuota.pGroup->ppPrev = &pGroup->pNext;
    pGroup->pNext = gQuota.pGroup;
    pGroup->ppPrev = &gQuota.pGroup;
    gQuota.pGroup = pGroup;
  }
  pGroup->iLimit = iLimit;
  pGroup->xCallback = xCallback;
  pGroup->pArg = pArg;
  quotaGroupDeref(pGroup);
  quotaLeave();
  return SQLITE_OK;
}

  
/***************************** Test Code ***********************************/
#ifdef SQLITE_TEST
#include <tcl.h>

typedef struct TclQuotaCallback TclQuotaCallback;
struct TclQuotaCallback {
  Tcl_Interp *interp;
  Tcl_Obj *pScript;
  TclQuotaCallback *pNext;
};
static TclQuotaCallback *pQuotaCallbackList = 0;

extern const char *sqlite3TestErrorName(int);

static void tclQuotaCallback(
  const char *zFilename,          /* Name of file whose size increases */
  sqlite3_int64 *piLimit,         /* IN/OUT: The current limit */
  sqlite3_int64 iSize,            /* Total size of all files in the group */
  void *pArg                      /* Client data */
){
  TclQuotaCallback *p;            /* Callback script object */
  Tcl_Obj *pEval;                 /* Script to evaluate */
  Tcl_Obj *pVarname;              /* Name of variable to pass as 2nd arg */
  unsigned int rnd;               /* Random part of pVarname */
  int rc;                         /* Tcl error code */

  p = (TclQuotaCallback *)pArg;

  pVarname = Tcl_NewStringObj("::piLimit_", -1);
  Tcl_IncrRefCount(pVarname);
  sqlite3_randomness(sizeof(rnd), (void *)&rnd);
  Tcl_AppendObjToObj(pVarname, Tcl_NewIntObj((int)(rnd&0x7FFFFFFF)));
  Tcl_ObjSetVar2(p->interp, pVarname, 0, Tcl_NewWideIntObj(*piLimit), 0);

  pEval = Tcl_DuplicateObj(p->pScript);
  Tcl_IncrRefCount(pEval);
  Tcl_ListObjAppendElement(0, pEval, Tcl_NewStringObj(zFilename, -1));
  Tcl_ListObjAppendElement(0, pEval, pVarname);
  Tcl_ListObjAppendElement(0, pEval, Tcl_NewWideIntObj(iSize));
  rc = Tcl_EvalObjEx(p->interp, pEval, TCL_EVAL_GLOBAL);

  if( rc==TCL_OK ){
    Tcl_Obj *pLimit = Tcl_ObjGetVar2(p->interp, pVarname, 0, 0);
    rc = Tcl_GetWideIntFromObj(p->interp, pLimit, piLimit);
    Tcl_UnsetVar(p->interp, Tcl_GetString(pVarname), 0);
  }

  Tcl_DecrRefCount(pEval);
  Tcl_DecrRefCount(pVarname);
  if( rc!=TCL_OK ) Tcl_BackgroundError(p->interp);
}

/*
** tclcmd: sqlite3_quota_initialize NAME MAKEDEFAULT
*/
static int test_quota_initialize(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  const char *zName;              /* Name of new quota VFS */
  int makeDefault;                /* True to make the new VFS the default */
  int rc;                         /* Value returned by quota_initialize() */

  /* Process arguments */
  if( objc!=3 ){
    Tcl_WrongNumArgs(interp, 1, objv, "NAME MAKEDEFAULT");
    return TCL_ERROR;
  }
  zName = Tcl_GetString(objv[1]);
  if( Tcl_GetBooleanFromObj(interp, objv[2], &makeDefault) ) return TCL_ERROR;
  if( zName[0]=='\0' ) zName = 0;

  /* Call sqlite3_quota_initialize() */
  rc = sqlite3_quota_initialize(zName, makeDefault);
  Tcl_SetResult(interp, (char *)sqlite3TestErrorName(rc), TCL_STATIC);

  return TCL_OK;
}

/*
** tclcmd: sqlite3_quota_shutdown
*/
static int test_quota_shutdown(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  int rc;                         /* Value returned by quota_shutdown() */

  if( objc!=1 ){
    Tcl_WrongNumArgs(interp, 1, objv, "");
    return TCL_ERROR;
  }

  /* Call sqlite3_quota_shutdown() */
  rc = sqlite3_quota_shutdown();
  Tcl_SetResult(interp, (char *)sqlite3TestErrorName(rc), TCL_STATIC);

  /* If the quota system was successfully shut down, delete all the quota
  ** callback script objects in the global linked list.
  */
  if( rc==SQLITE_OK ){
    TclQuotaCallback *p, *pNext;
    for(p=pQuotaCallbackList; p; p=pNext){
      pNext = p->pNext;
      Tcl_DecrRefCount(p->pScript);
      ckfree((char *)p);
    }
    pQuotaCallbackList = 0;
  }

  return TCL_OK;
}

/*
** tclcmd: sqlite3_quota_set PATTERN LIMIT SCRIPT
*/
static int test_quota_set(
  void * clientData,
  Tcl_Interp *interp,
  int objc,
  Tcl_Obj *CONST objv[]
){
  const char *zPattern;           /* File pattern to configure */
  sqlite3_int64 iLimit;           /* Initial quota in bytes */
  Tcl_Obj *pScript;               /* Tcl script to invoke to increase quota */
  int rc;                         /* Value returned by quota_set() */
  TclQuotaCallback *p;            /* Callback object */

  /* Process arguments */
  if( objc!=4 ){
    Tcl_WrongNumArgs(interp, 1, objv, "PATTERN LIMIT SCRIPT");
    return TCL_ERROR;
  }
  zPattern = Tcl_GetString(objv[1]);
  if( Tcl_GetWideIntFromObj(interp, objv[2], &iLimit) ) return TCL_ERROR;
  pScript = objv[3];

  /* Allocate a TclQuotaCallback object */
  p = (TclQuotaCallback *)ckalloc(sizeof(TclQuotaCallback));
  memset(p, 0, sizeof(TclQuotaCallback));

  /* Invoke sqlite3_quota_set() */
  rc = sqlite3_quota_set(zPattern, iLimit, tclQuotaCallback, (void *)p);
  if( rc!=SQLITE_OK ){
    ckfree((char *)p);
  }else{
    Tcl_IncrRefCount(pScript);
    p->interp = interp;
    p->pScript = pScript;
    p->pNext = pQuotaCallbackList;
    pQuotaCallbackList = p;
  }

  Tcl_SetResult(interp, (char *)sqlite3TestErrorName(rc), TCL_STATIC);
  return TCL_OK;
}

/*
** This routine registers the custom TCL commands defined in this
** module.  This should be the only procedure visible from outside
** of this module.
*/
int Sqlitequota_Init(Tcl_Interp *interp){
  static struct {
     char *zName;
     Tcl_ObjCmdProc *xProc;
  } aCmd[] = {
    { "sqlite3_quota_initialize", test_quota_initialize },
    { "sqlite3_quota_shutdown", test_quota_shutdown },
    { "sqlite3_quota_set", test_quota_set },
  };
  int i;

  for(i=0; i<sizeof(aCmd)/sizeof(aCmd[0]); i++){
    Tcl_CreateObjCommand(interp, aCmd[i].zName, aCmd[i].xProc, 0, 0);
  }

  return TCL_OK;
}
#endif
Added test/quota.test.












































































































































































































































































































>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
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
# 2010 September 1
#
# The author disclaims copyright to this source code.  In place of
# a legal notice, here is a blessing:
#
#    May you do good and not evil.
#    May you find forgiveness for yourself and forgive others.
#    May you share freely, never taking more than you give.
#
#***********************************************************************
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl

db close

do_test quota-1.1 { sqlite3_quota_initialize nosuchvfs 1 } {SQLITE_ERROR}
do_test quota-1.2 { sqlite3_quota_initialize "" 1 }        {SQLITE_OK}
do_test quota-1.3 { sqlite3_quota_initialize "" 1 }        {SQLITE_MISUSE}
do_test quota-1.4 { sqlite3_quota_shutdown }               {SQLITE_OK}

do_test quota-1.5 { sqlite3_quota_initialize "" 0 }        {SQLITE_OK}
do_test quota-1.6 { sqlite3_quota_shutdown }               {SQLITE_OK}
do_test quota-1.7 { sqlite3_quota_initialize "" 1 }        {SQLITE_OK}
do_test quota-1.8 { sqlite3_quota_shutdown }               {SQLITE_OK}


#-------------------------------------------------------------------------
# Some simple warm-body tests with a single database file in rollback 
# mode:
#
#   quota-2.1.*: Test that SQLITE_FULL is returned if the database would
#                exceed the configured quota.
#
#   quota-2.2.*: Test that SQLITE_FULL is not returned and the database
#                grows if the callback extends the quota when the database
#                attempts to grow beyond the configured quota.
#
#   quota-2.3.*: Open and close a db that is not part of any quota group. At
#                one point this was causing mutex refs to be leaked.
#
#   quota-2.4.*: Try to shutdown the quota system before closing the db
#                file. Check that this fails and the quota system still works
#                afterwards. Then close the database and successfully shut
#                down the quota system.
#   
sqlite3_quota_initialize "" 1

proc quota_check {filename limitvar size} {
  upvar $limitvar limit

  lappend ::quota [set limit] $size
  if {[info exists ::quota_request_ok]} { set limit $size }
}

do_test quota-2.1.1 {
  sqlite3_quota_set *test.db 4096 quota_check
} {SQLITE_OK}
do_test quota-2.1.2 {
  sqlite3 db test.db
  execsql {
    PRAGMA page_size=1024;
    PRAGMA auto_vacuum=OFF;
    PRAGMA journal_mode=DELETE;
  }
  set ::quota [list]
  execsql {
    CREATE TABLE t1(a, b);
    INSERT INTO t1 VALUES(1, randomblob(1100));
    INSERT INTO t1 VALUES(2, randomblob(1100));
  }
  set ::quota
} {}
do_test quota-2.1.3 { file size test.db } {4096}
do_test quota-2.1.4 {
  catchsql { INSERT INTO t1 VALUES(3, randomblob(1100)) }
} {1 {database or disk is full}}
do_test quota-2.1.5 { set ::quota } {4096 5120}

set ::quota_request_ok 1
set ::quota [list]
do_test quota-2.2.1 {
  execsql { INSERT INTO t1 VALUES(3, randomblob(1100)) }
} {}
do_test quota-2.2.2 { set ::quota } {4096 5120}
do_test quota-2.2.3 { file size test.db } {5120}
unset ::quota_request_ok

do_test quota-2.3.1 {
  sqlite3 db2 bak.db
  db2 close
} {}

do_test quota-2.4.1 {
  sqlite3_quota_shutdown
} {SQLITE_MISUSE}
set ::quota [list]
do_test quota-2.4.2 {
  catchsql { INSERT INTO t1 VALUES(3, randomblob(1100)) }
} {1 {database or disk is full}}
do_test quota-2.4.3 { set ::quota } {5120 6144}
do_test quota-2.4.4 { file size test.db } {5120}
do_test quota-2.4.5 {
  db close
  sqlite3_quota_shutdown
} {SQLITE_OK}

#-------------------------------------------------------------------------
# Try some tests with more than one connection to a database file. Still
# in rollback mode.
#
proc quota_check {filename limitvar size} {
  upvar $limitvar limit
  lappend ::quota [set limit] $size
  if {[info exists ::quota_request_ok]} { set limit $size }
}

do_test quota-3.1.1 {
  file delete -force test.db
  sqlite3_quota_initialize "" 1
  sqlite3_quota_set *test.db 4096 quota_check
} {SQLITE_OK}

do_test quota-3.1.2 {
  sqlite3 db test.db
  execsql {
    PRAGMA page_size = 1024;
    PRAGMA journal_mode = delete;
    PRAGMA auto_vacuum = off;
    CREATE TABLE t1(a PRIMARY KEY, b);
    INSERT INTO t1 VALUES(1, 'one');
  }
  file size test.db
} {3072}
do_test quota-3.1.3 {
  sqlite3 db2 test.db
  set ::quota [list]
  execsql { CREATE TABLE t2(a, b) } db2
  set ::quota
} {}

do_test quota-3.X {
  catch { db close }
  catch { db2 close }
  sqlite3_quota_shutdown 
} {SQLITE_OK}
finish_test