forked from RfidResearchGroup/proxmark3
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathspiffs_check.c
1006 lines (914 loc) · 52.4 KB
/
spiffs_check.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
/*
* spiffs_check.c
*
* Contains functionality for checking file system consistency
* and mending problems.
* Three levels of consistency checks are implemented:
*
* Look up consistency
* Checks if indices in lookup pages are coherent with page headers
* Object index consistency
* Checks if there are any orphaned object indices (missing object index headers).
* If an object index is found but not its header, the object index is deleted.
* This is critical for the following page consistency check.
* Page consistency
* Checks for pages that ought to be indexed, ought not to be indexed, are multiple indexed
*
*
* Created on: Jul 7, 2013
* Author: petera
*/
#include "spiffs.h"
#include "spiffs_nucleus.h"
#if !SPIFFS_READ_ONLY
#if SPIFFS_HAL_CALLBACK_EXTRA
#define CHECK_CB(_fs, _type, _rep, _arg1, _arg2) \
do { \
if ((_fs)->check_cb_f) (_fs)->check_cb_f((_fs), (_type), (_rep), (_arg1), (_arg2)); \
} while (0)
#else
#define CHECK_CB(_fs, _type, _rep, _arg1, _arg2) \
do { \
if ((_fs)->check_cb_f) (_fs)->check_cb_f((_type), (_rep), (_arg1), (_arg2)); \
} while (0)
#endif
//---------------------------------------
// Look up consistency
// searches in the object indices and returns the referenced page index given
// the object id and the data span index
// destroys fs->lu_work
static s32_t spiffs_object_get_data_page_index_reference(
spiffs *fs,
spiffs_obj_id obj_id,
spiffs_span_ix data_spix,
spiffs_page_ix *pix,
spiffs_page_ix *objix_pix) {
s32_t res;
// calculate object index span index for given data page span index
spiffs_span_ix objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, data_spix);
// find obj index for obj id and span index
res = spiffs_obj_lu_find_id_and_span(fs, obj_id | SPIFFS_OBJ_ID_IX_FLAG, objix_spix, 0, objix_pix);
SPIFFS_CHECK_RES(res);
// load obj index entry
u32_t addr = SPIFFS_PAGE_TO_PADDR(fs, *objix_pix);
if (objix_spix == 0) {
// get referenced page from object index header
addr += sizeof(spiffs_page_object_ix_header) + data_spix * sizeof(spiffs_page_ix);
} else {
// get referenced page from object index
addr += sizeof(spiffs_page_object_ix) + SPIFFS_OBJ_IX_ENTRY(fs, data_spix) * sizeof(spiffs_page_ix);
}
res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, addr, sizeof(spiffs_page_ix), (u8_t *)pix);
return res;
}
// copies page contents to a new page
static s32_t spiffs_rewrite_page(spiffs *fs, spiffs_page_ix cur_pix, spiffs_page_header *p_hdr, spiffs_page_ix *new_pix) {
s32_t res;
res = spiffs_page_allocate_data(fs, p_hdr->obj_id, p_hdr, 0, 0, 0, 0, new_pix);
SPIFFS_CHECK_RES(res);
res = spiffs_phys_cpy(fs, 0,
SPIFFS_PAGE_TO_PADDR(fs, *new_pix) + sizeof(spiffs_page_header),
SPIFFS_PAGE_TO_PADDR(fs, cur_pix) + sizeof(spiffs_page_header),
SPIFFS_DATA_PAGE_SIZE(fs));
SPIFFS_CHECK_RES(res);
return res;
}
// rewrites the object index for given object id and replaces the
// data page index to a new page index
static s32_t spiffs_rewrite_index(spiffs *fs, spiffs_obj_id obj_id, spiffs_span_ix data_spix, spiffs_page_ix new_data_pix, spiffs_page_ix objix_pix) {
s32_t res;
spiffs_block_ix bix;
int entry;
spiffs_page_ix free_pix;
obj_id |= SPIFFS_OBJ_ID_IX_FLAG;
// find free entry
res = spiffs_obj_lu_find_free(fs, fs->free_cursor_block_ix, fs->free_cursor_obj_lu_entry, &bix, &entry);
SPIFFS_CHECK_RES(res);
free_pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, entry);
// calculate object index span index for given data page span index
spiffs_span_ix objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, data_spix);
if (objix_spix == 0) {
// calc index in index header
entry = data_spix;
} else {
// calc entry in index
entry = SPIFFS_OBJ_IX_ENTRY(fs, data_spix);
}
// load index
res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
0, SPIFFS_PAGE_TO_PADDR(fs, objix_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work);
SPIFFS_CHECK_RES(res);
spiffs_page_header *objix_p_hdr = (spiffs_page_header *)fs->lu_work;
// be ultra safe, double check header against provided data
if (objix_p_hdr->obj_id != obj_id) {
spiffs_page_delete(fs, free_pix);
return SPIFFS_ERR_CHECK_OBJ_ID_MISM;
}
if (objix_p_hdr->span_ix != objix_spix) {
spiffs_page_delete(fs, free_pix);
return SPIFFS_ERR_CHECK_SPIX_MISM;
}
if ((objix_p_hdr->flags & (SPIFFS_PH_FLAG_USED | SPIFFS_PH_FLAG_IXDELE | SPIFFS_PH_FLAG_INDEX |
SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_DELET)) !=
(SPIFFS_PH_FLAG_IXDELE | SPIFFS_PH_FLAG_DELET)) {
spiffs_page_delete(fs, free_pix);
return SPIFFS_ERR_CHECK_FLAGS_BAD;
}
// rewrite in mem
if (objix_spix == 0) {
((spiffs_page_ix *)((u8_t *)fs->lu_work + sizeof(spiffs_page_object_ix_header)))[data_spix] = new_data_pix;
} else {
((spiffs_page_ix *)((u8_t *)fs->lu_work + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, data_spix)] = new_data_pix;
}
res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT,
0, SPIFFS_PAGE_TO_PADDR(fs, free_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work);
SPIFFS_CHECK_RES(res);
res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_UPDT,
0, SPIFFS_BLOCK_TO_PADDR(fs, SPIFFS_BLOCK_FOR_PAGE(fs, free_pix)) + SPIFFS_OBJ_LOOKUP_ENTRY_FOR_PAGE(fs, free_pix) * sizeof(spiffs_page_ix),
sizeof(spiffs_obj_id),
(u8_t *)&obj_id);
SPIFFS_CHECK_RES(res);
res = spiffs_page_delete(fs, objix_pix);
return res;
}
// deletes an object just by marking object index header as deleted
static s32_t spiffs_delete_obj_lazy(spiffs *fs, spiffs_obj_id obj_id) {
spiffs_page_ix objix_hdr_pix;
s32_t res;
res = spiffs_obj_lu_find_id_and_span(fs, obj_id, 0, 0, &objix_hdr_pix);
if (res == SPIFFS_ERR_NOT_FOUND) {
return SPIFFS_OK;
}
SPIFFS_CHECK_RES(res);
u8_t flags = 0xff;
#if SPIFFS_NO_BLIND_WRITES
res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ,
0, SPIFFS_PAGE_TO_PADDR(fs, objix_hdr_pix) + offsetof(spiffs_page_header, flags),
sizeof(flags), &flags);
SPIFFS_CHECK_RES(res);
#endif
flags &= ~SPIFFS_PH_FLAG_IXDELE;
res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_UPDT,
0, SPIFFS_PAGE_TO_PADDR(fs, objix_hdr_pix) + offsetof(spiffs_page_header, flags),
sizeof(flags), &flags);
return res;
}
// validates the given look up entry
static s32_t spiffs_lookup_check_validate(spiffs *fs, spiffs_obj_id lu_obj_id, spiffs_page_header *p_hdr,
spiffs_page_ix cur_pix, spiffs_block_ix cur_block, int cur_entry, int *reload_lu) {
(void)cur_block;
(void)cur_entry;
u8_t delete_page = 0;
s32_t res = SPIFFS_OK;
spiffs_page_ix objix_pix;
spiffs_page_ix ref_pix;
// check validity, take actions
if (((lu_obj_id == SPIFFS_OBJ_ID_DELETED) && (p_hdr->flags & SPIFFS_PH_FLAG_DELET)) ||
((lu_obj_id == SPIFFS_OBJ_ID_FREE) && (p_hdr->flags & SPIFFS_PH_FLAG_USED) == 0)) {
// look up entry deleted / free but used in page header
SPIFFS_CHECK_DBG("LU: pix "_SPIPRIpg" deleted/free in lu but not on page\n", cur_pix);
*reload_lu = 1;
delete_page = 1;
if (p_hdr->flags & SPIFFS_PH_FLAG_INDEX) {
// header says data page
// data page can be removed if not referenced by some object index
res = spiffs_object_get_data_page_index_reference(fs, p_hdr->obj_id, p_hdr->span_ix, &ref_pix, &objix_pix);
if (res == SPIFFS_ERR_NOT_FOUND) {
// no object with this id, so remove page safely
res = SPIFFS_OK;
} else {
SPIFFS_CHECK_RES(res);
if (ref_pix == cur_pix) {
// data page referenced by object index but deleted in lu
// copy page to new place and re-write the object index to new place
spiffs_page_ix new_pix;
res = spiffs_rewrite_page(fs, cur_pix, p_hdr, &new_pix);
SPIFFS_CHECK_DBG("LU: FIXUP: data page not found elsewhere, rewriting "_SPIPRIpg" to new page "_SPIPRIpg"\n", cur_pix, new_pix);
SPIFFS_CHECK_RES(res);
*reload_lu = 1;
SPIFFS_CHECK_DBG("LU: FIXUP: "_SPIPRIpg" rewritten to "_SPIPRIpg", affected objix_pix "_SPIPRIpg"\n", cur_pix, new_pix, objix_pix);
res = spiffs_rewrite_index(fs, p_hdr->obj_id, p_hdr->span_ix, new_pix, objix_pix);
if (res <= _SPIFFS_ERR_CHECK_FIRST && res > _SPIFFS_ERR_CHECK_LAST) {
// index bad also, cannot mend this file
SPIFFS_CHECK_DBG("LU: FIXUP: index bad "_SPIPRIi", cannot mend!\n", res);
res = spiffs_page_delete(fs, new_pix);
SPIFFS_CHECK_RES(res);
res = spiffs_delete_obj_lazy(fs, p_hdr->obj_id);
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_DELETE_BAD_FILE, p_hdr->obj_id, 0);
} else {
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_INDEX, p_hdr->obj_id, p_hdr->span_ix);
}
SPIFFS_CHECK_RES(res);
}
}
} else {
// header says index page
// index page can be removed if other index with same obj_id and spanix is found
res = spiffs_obj_lu_find_id_and_span(fs, p_hdr->obj_id | SPIFFS_OBJ_ID_IX_FLAG, p_hdr->span_ix, cur_pix, 0);
if (res == SPIFFS_ERR_NOT_FOUND) {
// no such index page found, check for a data page amongst page headers
// lu cannot be trusted
res = spiffs_obj_lu_find_id_and_span_by_phdr(fs, p_hdr->obj_id | SPIFFS_OBJ_ID_IX_FLAG, 0, 0, 0);
if (res == SPIFFS_OK) { // ignore other errors
// got a data page also, assume lu corruption only, rewrite to new page
spiffs_page_ix new_pix;
res = spiffs_rewrite_page(fs, cur_pix, p_hdr, &new_pix);
SPIFFS_CHECK_DBG("LU: FIXUP: ix page with data not found elsewhere, rewriting "_SPIPRIpg" to new page "_SPIPRIpg"\n", cur_pix, new_pix);
SPIFFS_CHECK_RES(res);
*reload_lu = 1;
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_LOOKUP, p_hdr->obj_id, p_hdr->span_ix);
}
} else {
SPIFFS_CHECK_RES(res);
}
}
}
if (lu_obj_id != SPIFFS_OBJ_ID_FREE && lu_obj_id != SPIFFS_OBJ_ID_DELETED) {
// look up entry used
if ((p_hdr->obj_id | SPIFFS_OBJ_ID_IX_FLAG) != (lu_obj_id | SPIFFS_OBJ_ID_IX_FLAG)) {
SPIFFS_CHECK_DBG("LU: pix "_SPIPRIpg" differ in obj_id lu:"_SPIPRIid" ph:"_SPIPRIid"\n", cur_pix, lu_obj_id, p_hdr->obj_id);
delete_page = 1;
if ((p_hdr->flags & SPIFFS_PH_FLAG_DELET) == 0 ||
(p_hdr->flags & SPIFFS_PH_FLAG_FINAL) ||
(p_hdr->flags & (SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_IXDELE)) == 0) {
// page deleted or not finalized, just remove it
} else {
if (p_hdr->flags & SPIFFS_PH_FLAG_INDEX) {
// if data page, check for reference to this page
res = spiffs_object_get_data_page_index_reference(fs, p_hdr->obj_id, p_hdr->span_ix, &ref_pix, &objix_pix);
if (res == SPIFFS_ERR_NOT_FOUND) {
// no object with this id, so remove page safely
res = SPIFFS_OK;
} else {
SPIFFS_CHECK_RES(res);
// if found, rewrite page with object id, update index, and delete current
if (ref_pix == cur_pix) {
spiffs_page_ix new_pix;
res = spiffs_rewrite_page(fs, cur_pix, p_hdr, &new_pix);
SPIFFS_CHECK_RES(res);
res = spiffs_rewrite_index(fs, p_hdr->obj_id, p_hdr->span_ix, new_pix, objix_pix);
if (res <= _SPIFFS_ERR_CHECK_FIRST && res > _SPIFFS_ERR_CHECK_LAST) {
// index bad also, cannot mend this file
SPIFFS_CHECK_DBG("LU: FIXUP: index bad "_SPIPRIi", cannot mend!\n", res);
res = spiffs_page_delete(fs, new_pix);
SPIFFS_CHECK_RES(res);
res = spiffs_delete_obj_lazy(fs, p_hdr->obj_id);
*reload_lu = 1;
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_DELETE_BAD_FILE, p_hdr->obj_id, 0);
}
SPIFFS_CHECK_RES(res);
}
}
} else {
// else if index, check for other pages with both obj_id's and spanix
spiffs_page_ix objix_pix_lu, objix_pix_ph;
// see if other object index page exists for lookup obj id and span index
res = spiffs_obj_lu_find_id_and_span(fs, lu_obj_id | SPIFFS_OBJ_ID_IX_FLAG, p_hdr->span_ix, 0, &objix_pix_lu);
if (res == SPIFFS_ERR_NOT_FOUND) {
res = SPIFFS_OK;
objix_pix_lu = 0;
}
SPIFFS_CHECK_RES(res);
// see if other object index exists for page header obj id and span index
res = spiffs_obj_lu_find_id_and_span(fs, p_hdr->obj_id | SPIFFS_OBJ_ID_IX_FLAG, p_hdr->span_ix, 0, &objix_pix_ph);
if (res == SPIFFS_ERR_NOT_FOUND) {
res = SPIFFS_OK;
objix_pix_ph = 0;
}
SPIFFS_CHECK_RES(res);
// if both obj_id's found, just delete current
if (objix_pix_ph == 0 || objix_pix_lu == 0) {
// otherwise try finding first corresponding data pages
spiffs_page_ix data_pix_lu, data_pix_ph;
// see if other data page exists for look up obj id and span index
res = spiffs_obj_lu_find_id_and_span(fs, lu_obj_id & ~SPIFFS_OBJ_ID_IX_FLAG, 0, 0, &data_pix_lu);
if (res == SPIFFS_ERR_NOT_FOUND) {
res = SPIFFS_OK;
objix_pix_lu = 0;
}
SPIFFS_CHECK_RES(res);
// see if other data page exists for page header obj id and span index
res = spiffs_obj_lu_find_id_and_span(fs, p_hdr->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG, 0, 0, &data_pix_ph);
if (res == SPIFFS_ERR_NOT_FOUND) {
res = SPIFFS_OK;
objix_pix_ph = 0;
}
SPIFFS_CHECK_RES(res);
spiffs_page_header new_ph;
new_ph.flags = 0xff & ~(SPIFFS_PH_FLAG_USED | SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_FINAL);
new_ph.span_ix = p_hdr->span_ix;
spiffs_page_ix new_pix;
if ((objix_pix_lu && data_pix_lu && data_pix_ph && objix_pix_ph == 0) ||
(objix_pix_lu == 0 && data_pix_ph && objix_pix_ph == 0)) {
// got a data page for page header obj id
// rewrite as obj_id_ph
new_ph.obj_id = p_hdr->obj_id | SPIFFS_OBJ_ID_IX_FLAG;
res = spiffs_rewrite_page(fs, cur_pix, &new_ph, &new_pix);
SPIFFS_CHECK_DBG("LU: FIXUP: rewrite page "_SPIPRIpg" as "_SPIPRIid" to pix "_SPIPRIpg"\n", cur_pix, new_ph.obj_id, new_pix);
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_LOOKUP, p_hdr->obj_id, p_hdr->span_ix);
SPIFFS_CHECK_RES(res);
*reload_lu = 1;
} else if ((objix_pix_ph && data_pix_ph && data_pix_lu && objix_pix_lu == 0) ||
(objix_pix_ph == 0 && data_pix_lu && objix_pix_lu == 0)) {
// got a data page for look up obj id
// rewrite as obj_id_lu
new_ph.obj_id = lu_obj_id | SPIFFS_OBJ_ID_IX_FLAG;
SPIFFS_CHECK_DBG("LU: FIXUP: rewrite page "_SPIPRIpg" as "_SPIPRIid"\n", cur_pix, new_ph.obj_id);
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_LOOKUP, p_hdr->obj_id, p_hdr->span_ix);
res = spiffs_rewrite_page(fs, cur_pix, &new_ph, &new_pix);
SPIFFS_CHECK_RES(res);
*reload_lu = 1;
} else {
// cannot safely do anything
SPIFFS_CHECK_DBG("LU: FIXUP: nothing to do, just delete\n", NULL);
}
}
}
}
} else if (((lu_obj_id & SPIFFS_OBJ_ID_IX_FLAG) && (p_hdr->flags & SPIFFS_PH_FLAG_INDEX)) ||
((lu_obj_id & SPIFFS_OBJ_ID_IX_FLAG) == 0 && (p_hdr->flags & SPIFFS_PH_FLAG_INDEX) == 0)) {
SPIFFS_CHECK_DBG("LU: "_SPIPRIpg" lu/page index marking differ\n", cur_pix);
spiffs_page_ix data_pix, objix_pix_d;
// see if other data page exists for given obj id and span index
res = spiffs_obj_lu_find_id_and_span(fs, lu_obj_id & ~SPIFFS_OBJ_ID_IX_FLAG, p_hdr->span_ix, cur_pix, &data_pix);
if (res == SPIFFS_ERR_NOT_FOUND) {
res = SPIFFS_OK;
data_pix = 0;
}
SPIFFS_CHECK_RES(res);
// see if other object index exists for given obj id and span index
res = spiffs_obj_lu_find_id_and_span(fs, lu_obj_id | SPIFFS_OBJ_ID_IX_FLAG, p_hdr->span_ix, cur_pix, &objix_pix_d);
if (res == SPIFFS_ERR_NOT_FOUND) {
res = SPIFFS_OK;
objix_pix_d = 0;
}
SPIFFS_CHECK_RES(res);
delete_page = 1;
// if other data page exists and object index exists, just delete page
if (data_pix && objix_pix_d) {
SPIFFS_CHECK_DBG("LU: FIXUP: other index and data page exists, simply remove\n", NULL);
} else
// if only data page exists, make this page index
if (data_pix && objix_pix_d == 0) {
SPIFFS_CHECK_DBG("LU: FIXUP: other data page exists, make this index\n", NULL);
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_INDEX, lu_obj_id, p_hdr->span_ix);
spiffs_page_header new_ph;
spiffs_page_ix new_pix;
new_ph.flags = 0xff & ~(SPIFFS_PH_FLAG_USED | SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_INDEX);
new_ph.obj_id = lu_obj_id | SPIFFS_OBJ_ID_IX_FLAG;
new_ph.span_ix = p_hdr->span_ix;
res = spiffs_page_allocate_data(fs, new_ph.obj_id, &new_ph, 0, 0, 0, 1, &new_pix);
SPIFFS_CHECK_RES(res);
res = spiffs_phys_cpy(fs, 0, SPIFFS_PAGE_TO_PADDR(fs, new_pix) + sizeof(spiffs_page_header),
SPIFFS_PAGE_TO_PADDR(fs, cur_pix) + sizeof(spiffs_page_header),
SPIFFS_CFG_LOG_PAGE_SZ(fs) - sizeof(spiffs_page_header));
SPIFFS_CHECK_RES(res);
} else
// if only index exists, make data page
if (data_pix == 0 && objix_pix_d) {
SPIFFS_CHECK_DBG("LU: FIXUP: other index page exists, make this data\n", NULL);
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_LOOKUP, lu_obj_id, p_hdr->span_ix);
spiffs_page_header new_ph;
spiffs_page_ix new_pix;
new_ph.flags = 0xff & ~(SPIFFS_PH_FLAG_USED | SPIFFS_PH_FLAG_FINAL);
new_ph.obj_id = lu_obj_id & ~SPIFFS_OBJ_ID_IX_FLAG;
new_ph.span_ix = p_hdr->span_ix;
res = spiffs_page_allocate_data(fs, new_ph.obj_id, &new_ph, 0, 0, 0, 1, &new_pix);
SPIFFS_CHECK_RES(res);
res = spiffs_phys_cpy(fs, 0, SPIFFS_PAGE_TO_PADDR(fs, new_pix) + sizeof(spiffs_page_header),
SPIFFS_PAGE_TO_PADDR(fs, cur_pix) + sizeof(spiffs_page_header),
SPIFFS_CFG_LOG_PAGE_SZ(fs) - sizeof(spiffs_page_header));
SPIFFS_CHECK_RES(res);
} else {
// if nothing exists, we cannot safely make a decision - delete
}
} else if ((p_hdr->flags & SPIFFS_PH_FLAG_DELET) == 0) {
SPIFFS_CHECK_DBG("LU: pix "_SPIPRIpg" busy in lu but deleted on page\n", cur_pix);
delete_page = 1;
} else if ((p_hdr->flags & SPIFFS_PH_FLAG_FINAL)) {
SPIFFS_CHECK_DBG("LU: pix "_SPIPRIpg" busy but not final\n", cur_pix);
// page can be removed if not referenced by object index
*reload_lu = 1;
res = spiffs_object_get_data_page_index_reference(fs, lu_obj_id, p_hdr->span_ix, &ref_pix, &objix_pix);
if (res == SPIFFS_ERR_NOT_FOUND) {
// no object with this id, so remove page safely
res = SPIFFS_OK;
delete_page = 1;
} else {
SPIFFS_CHECK_RES(res);
if (ref_pix != cur_pix) {
SPIFFS_CHECK_DBG("LU: FIXUP: other finalized page is referred, just delete\n", NULL);
delete_page = 1;
} else {
// page referenced by object index but not final
// just finalize
SPIFFS_CHECK_DBG("LU: FIXUP: unfinalized page is referred, finalizing\n", NULL);
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_LOOKUP, p_hdr->obj_id, p_hdr->span_ix);
u8_t flags = 0xff;
#if SPIFFS_NO_BLIND_WRITES
res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_READ,
0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix) + offsetof(spiffs_page_header, flags),
sizeof(flags), &flags);
SPIFFS_CHECK_RES(res);
#endif
flags &= ~SPIFFS_PH_FLAG_FINAL;
res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT,
0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix) + offsetof(spiffs_page_header, flags),
sizeof(flags), &flags);
}
}
}
}
if (delete_page) {
SPIFFS_CHECK_DBG("LU: FIXUP: deleting page "_SPIPRIpg"\n", cur_pix);
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_DELETE_PAGE, cur_pix, 0);
res = spiffs_page_delete(fs, cur_pix);
SPIFFS_CHECK_RES(res);
}
return res;
}
static s32_t spiffs_lookup_check_v(spiffs *fs, spiffs_obj_id obj_id, spiffs_block_ix cur_block, int cur_entry,
const void *user_const_p, void *user_var_p) {
(void)user_const_p;
(void)user_var_p;
s32_t res = SPIFFS_OK;
spiffs_page_header p_hdr;
spiffs_page_ix cur_pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, cur_block, cur_entry);
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_PROGRESS,
(cur_block * 256) / fs->block_count, 0);
// load header
res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t *)&p_hdr);
SPIFFS_CHECK_RES(res);
int reload_lu = 0;
res = spiffs_lookup_check_validate(fs, obj_id, &p_hdr, cur_pix, cur_block, cur_entry, &reload_lu);
SPIFFS_CHECK_RES(res);
if (res == SPIFFS_OK) {
return reload_lu ? SPIFFS_VIS_COUNTINUE_RELOAD : SPIFFS_VIS_COUNTINUE;
}
return res;
}
// Scans all object look up. For each entry, corresponding page header is checked for validity.
// If an object index header page is found, this is also checked
s32_t spiffs_lookup_consistency_check(spiffs *fs, u8_t check_all_objects) {
(void)check_all_objects;
s32_t res = SPIFFS_OK;
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_PROGRESS, 0, 0);
res = spiffs_obj_lu_find_entry_visitor(fs, 0, 0, 0, 0, spiffs_lookup_check_v, 0, 0, 0, 0);
if (res == SPIFFS_VIS_END) {
res = SPIFFS_OK;
}
if (res != SPIFFS_OK) {
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_ERROR, res, 0);
}
CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_PROGRESS, 256, 0);
return res;
}
//---------------------------------------
// Page consistency
// Scans all pages (except lu pages), reserves 4 bits in working memory for each page
// bit 0: 0 == FREE|DELETED, 1 == USED
// bit 1: 0 == UNREFERENCED, 1 == REFERENCED
// bit 2: 0 == NOT_INDEX, 1 == INDEX
// bit 3: unused
// A consistent file system will have only pages being
// * x000 free, unreferenced, not index
// * x011 used, referenced only once, not index
// * x101 used, unreferenced, index
// The working memory might not fit all pages so several scans might be needed
static s32_t spiffs_page_consistency_check_i(spiffs *fs) {
const u32_t bits = 4;
const spiffs_page_ix pages_per_scan = SPIFFS_CFG_LOG_PAGE_SZ(fs) * 8 / bits;
s32_t res = SPIFFS_OK;
spiffs_page_ix pix_offset = 0;
// for each range of pages fitting into work memory
while (pix_offset < SPIFFS_PAGES_PER_BLOCK(fs) * fs->block_count) {
// set this flag to abort all checks and rescan the page range
u8_t restart = 0;
memset(fs->work, 0, SPIFFS_CFG_LOG_PAGE_SZ(fs));
spiffs_block_ix cur_block = 0;
// build consistency bitmap for id range traversing all blocks
while (!restart && cur_block < fs->block_count) {
CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_PROGRESS,
(pix_offset * 256) / (SPIFFS_PAGES_PER_BLOCK(fs) * fs->block_count) +
((((cur_block * pages_per_scan * 256) / (SPIFFS_PAGES_PER_BLOCK(fs) * fs->block_count))) / fs->block_count),
0);
// traverse each page except for lookup pages
spiffs_page_ix cur_pix = SPIFFS_OBJ_LOOKUP_PAGES(fs) + SPIFFS_PAGES_PER_BLOCK(fs) * cur_block;
while (!restart && cur_pix < SPIFFS_PAGES_PER_BLOCK(fs) * (cur_block + 1)) {
//if ((cur_pix & 0xff) == 0)
// SPIFFS_CHECK_DBG("PA: processing pix "_SPIPRIpg", block "_SPIPRIbl" of pix "_SPIPRIpg", block "_SPIPRIbl"\n",
// cur_pix, cur_block, SPIFFS_PAGES_PER_BLOCK(fs) * fs->block_count, fs->block_count);
// read header
spiffs_page_header p_hdr;
res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t *)&p_hdr);
SPIFFS_CHECK_RES(res);
u8_t within_range = (cur_pix >= pix_offset && cur_pix < pix_offset + pages_per_scan);
const u32_t pix_byte_ix = (cur_pix - pix_offset) / (8 / bits);
const u8_t pix_bit_ix = (cur_pix & ((8 / bits) - 1)) * bits;
if (within_range &&
(p_hdr.flags & SPIFFS_PH_FLAG_DELET) && (p_hdr.flags & SPIFFS_PH_FLAG_USED) == 0) {
// used
fs->work[pix_byte_ix] |= (1 << (pix_bit_ix + 0));
}
if ((p_hdr.flags & SPIFFS_PH_FLAG_DELET) &&
(p_hdr.flags & SPIFFS_PH_FLAG_IXDELE) &&
(p_hdr.flags & (SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_USED)) == 0) {
// found non-deleted index
if (within_range) {
fs->work[pix_byte_ix] |= (1 << (pix_bit_ix + 2));
}
// load non-deleted index
res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work);
SPIFFS_CHECK_RES(res);
// traverse index for referenced pages
spiffs_page_ix *object_page_index;
spiffs_page_header *objix_p_hdr = (spiffs_page_header *)fs->lu_work;
int entries;
int i;
spiffs_span_ix data_spix_offset;
if (p_hdr.span_ix == 0) {
// object header page index
entries = SPIFFS_OBJ_HDR_IX_LEN(fs);
data_spix_offset = 0;
object_page_index = (spiffs_page_ix *)((u8_t *)fs->lu_work + sizeof(spiffs_page_object_ix_header));
} else {
// object page index
entries = SPIFFS_OBJ_IX_LEN(fs);
data_spix_offset = SPIFFS_OBJ_HDR_IX_LEN(fs) + SPIFFS_OBJ_IX_LEN(fs) * (p_hdr.span_ix - 1);
object_page_index = (spiffs_page_ix *)((u8_t *)fs->lu_work + sizeof(spiffs_page_object_ix));
}
// for all entries in index
for (i = 0; !restart && i < entries; i++) {
spiffs_page_ix rpix = object_page_index[i];
u8_t rpix_within_range = rpix >= pix_offset && rpix < pix_offset + pages_per_scan;
if ((rpix != (spiffs_page_ix) - 1 && rpix > SPIFFS_MAX_PAGES(fs))
|| (rpix_within_range && SPIFFS_IS_LOOKUP_PAGE(fs, rpix))) {
// bad reference
SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg"x bad pix / LU referenced from page "_SPIPRIpg"\n",
rpix, cur_pix);
// check for data page elsewhere
spiffs_page_ix data_pix;
res = spiffs_obj_lu_find_id_and_span(fs, objix_p_hdr->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG,
data_spix_offset + i, 0, &data_pix);
if (res == SPIFFS_ERR_NOT_FOUND) {
res = SPIFFS_OK;
data_pix = 0;
}
SPIFFS_CHECK_RES(res);
if (data_pix == 0) {
// if not, allocate free page
spiffs_page_header new_ph;
new_ph.flags = 0xff & ~(SPIFFS_PH_FLAG_USED | SPIFFS_PH_FLAG_FINAL);
new_ph.obj_id = objix_p_hdr->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG;
new_ph.span_ix = data_spix_offset + i;
res = spiffs_page_allocate_data(fs, new_ph.obj_id, &new_ph, 0, 0, 0, 1, &data_pix);
SPIFFS_CHECK_RES(res);
SPIFFS_CHECK_DBG("PA: FIXUP: found no existing data page, created new @ "_SPIPRIpg"\n", data_pix);
}
// remap index
SPIFFS_CHECK_DBG("PA: FIXUP: rewriting index pix "_SPIPRIpg"\n", cur_pix);
res = spiffs_rewrite_index(fs, objix_p_hdr->obj_id | SPIFFS_OBJ_ID_IX_FLAG,
data_spix_offset + i, data_pix, cur_pix);
if (res <= _SPIFFS_ERR_CHECK_FIRST && res > _SPIFFS_ERR_CHECK_LAST) {
// index bad also, cannot mend this file
SPIFFS_CHECK_DBG("PA: FIXUP: index bad "_SPIPRIi", cannot mend - delete object\n", res);
CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_DELETE_BAD_FILE, objix_p_hdr->obj_id, 0);
// delete file
res = spiffs_page_delete(fs, cur_pix);
} else {
CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_FIX_INDEX, objix_p_hdr->obj_id, objix_p_hdr->span_ix);
}
SPIFFS_CHECK_RES(res);
restart = 1;
} else if (rpix_within_range) {
// valid reference
// read referenced page header
spiffs_page_header rp_hdr;
res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
0, SPIFFS_PAGE_TO_PADDR(fs, rpix), sizeof(spiffs_page_header), (u8_t *)&rp_hdr);
SPIFFS_CHECK_RES(res);
// cross reference page header check
if (rp_hdr.obj_id != (p_hdr.obj_id & ~SPIFFS_OBJ_ID_IX_FLAG) ||
rp_hdr.span_ix != data_spix_offset + i ||
(rp_hdr.flags & (SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_USED)) !=
(SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_INDEX)) {
SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" has inconsistent page header ix id/span:"_SPIPRIid"/"_SPIPRIsp", ref id/span:"_SPIPRIid"/"_SPIPRIsp" flags:"_SPIPRIfl"\n",
rpix, p_hdr.obj_id & ~SPIFFS_OBJ_ID_IX_FLAG, data_spix_offset + i,
rp_hdr.obj_id, rp_hdr.span_ix, rp_hdr.flags);
// try finding correct page
spiffs_page_ix data_pix;
res = spiffs_obj_lu_find_id_and_span(fs, p_hdr.obj_id & ~SPIFFS_OBJ_ID_IX_FLAG,
data_spix_offset + i, rpix, &data_pix);
if (res == SPIFFS_ERR_NOT_FOUND) {
res = SPIFFS_OK;
data_pix = 0;
}
SPIFFS_CHECK_RES(res);
if (data_pix == 0) {
// not found, this index is badly borked
SPIFFS_CHECK_DBG("PA: FIXUP: index bad, delete object id "_SPIPRIid"\n", p_hdr.obj_id);
CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_DELETE_BAD_FILE, p_hdr.obj_id, 0);
res = spiffs_delete_obj_lazy(fs, p_hdr.obj_id);
SPIFFS_CHECK_RES(res);
break;
} else {
// found it, so rewrite index
SPIFFS_CHECK_DBG("PA: FIXUP: found correct data pix "_SPIPRIpg", rewrite ix pix "_SPIPRIpg" id "_SPIPRIid"\n",
data_pix, cur_pix, p_hdr.obj_id);
res = spiffs_rewrite_index(fs, p_hdr.obj_id, data_spix_offset + i, data_pix, cur_pix);
if (res <= _SPIFFS_ERR_CHECK_FIRST && res > _SPIFFS_ERR_CHECK_LAST) {
// index bad also, cannot mend this file
SPIFFS_CHECK_DBG("PA: FIXUP: index bad "_SPIPRIi", cannot mend!\n", res);
CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_DELETE_BAD_FILE, p_hdr.obj_id, 0);
res = spiffs_delete_obj_lazy(fs, p_hdr.obj_id);
} else {
CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_FIX_INDEX, p_hdr.obj_id, p_hdr.span_ix);
}
SPIFFS_CHECK_RES(res);
restart = 1;
}
} else {
// mark rpix as referenced
const u32_t rpix_byte_ix = (rpix - pix_offset) / (8 / bits);
const u8_t rpix_bit_ix = (rpix & ((8 / bits) - 1)) * bits;
if (fs->work[rpix_byte_ix] & (1 << (rpix_bit_ix + 1))) {
SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" multiple referenced from page "_SPIPRIpg"\n",
rpix, cur_pix);
// Here, we should have fixed all broken references - getting this means there
// must be multiple files with same object id. Only solution is to delete
// the object which is referring to this page
SPIFFS_CHECK_DBG("PA: FIXUP: removing object "_SPIPRIid" and page "_SPIPRIpg"\n",
p_hdr.obj_id, cur_pix);
CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_DELETE_BAD_FILE, p_hdr.obj_id, 0);
res = spiffs_delete_obj_lazy(fs, p_hdr.obj_id);
SPIFFS_CHECK_RES(res);
// extra precaution, delete this page also
res = spiffs_page_delete(fs, cur_pix);
SPIFFS_CHECK_RES(res);
restart = 1;
}
fs->work[rpix_byte_ix] |= (1 << (rpix_bit_ix + 1));
}
}
} // for all index entries
} // found index
// next page
cur_pix++;
}
// next block
cur_block++;
}
// check consistency bitmap
if (!restart) {
spiffs_page_ix objix_pix;
spiffs_page_ix rpix;
u32_t byte_ix;
u8_t bit_ix;
for (byte_ix = 0; !restart && byte_ix < SPIFFS_CFG_LOG_PAGE_SZ(fs); byte_ix++) {
for (bit_ix = 0; !restart && bit_ix < 8 / bits; bit_ix ++) {
u8_t bitmask = (fs->work[byte_ix] >> (bit_ix * bits)) & 0x7;
spiffs_page_ix cur_pix = pix_offset + byte_ix * (8 / bits) + bit_ix;
// 000 ok - free, unreferenced, not index
if (bitmask == 0x1) {
// 001
SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" USED, UNREFERENCED, not index\n", cur_pix);
u8_t rewrite_ix_to_this = 0;
u8_t delete_page = 0;
// check corresponding object index entry
spiffs_page_header p_hdr;
res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t *)&p_hdr);
SPIFFS_CHECK_RES(res);
res = spiffs_object_get_data_page_index_reference(fs, p_hdr.obj_id, p_hdr.span_ix,
&rpix, &objix_pix);
if (res == SPIFFS_OK) {
if (((rpix == (spiffs_page_ix) - 1 || rpix > SPIFFS_MAX_PAGES(fs)) || (SPIFFS_IS_LOOKUP_PAGE(fs, rpix)))) {
// pointing to a bad page altogether, rewrite index to this
rewrite_ix_to_this = 1;
SPIFFS_CHECK_DBG("PA: corresponding ref is bad: "_SPIPRIpg", rewrite to this "_SPIPRIpg"\n", rpix, cur_pix);
} else {
// pointing to something else, check what
spiffs_page_header rp_hdr;
res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
0, SPIFFS_PAGE_TO_PADDR(fs, rpix), sizeof(spiffs_page_header), (u8_t *)&rp_hdr);
SPIFFS_CHECK_RES(res);
if (((p_hdr.obj_id & ~SPIFFS_OBJ_ID_IX_FLAG) == rp_hdr.obj_id) &&
((rp_hdr.flags & (SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_USED | SPIFFS_PH_FLAG_FINAL)) ==
(SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_DELET))) {
// pointing to something else valid, just delete this page then
SPIFFS_CHECK_DBG("PA: corresponding ref is good but different: "_SPIPRIpg", delete this "_SPIPRIpg"\n", rpix, cur_pix);
delete_page = 1;
} else {
// pointing to something weird, update index to point to this page instead
if (rpix != cur_pix) {
SPIFFS_CHECK_DBG("PA: corresponding ref is weird: "_SPIPRIpg" %s%s%s%s, rewrite this "_SPIPRIpg"\n", rpix,
(rp_hdr.flags & SPIFFS_PH_FLAG_INDEX) ? "" : "INDEX ",
(rp_hdr.flags & SPIFFS_PH_FLAG_DELET) ? "" : "DELETED ",
(rp_hdr.flags & SPIFFS_PH_FLAG_USED) ? "NOTUSED " : "",
(rp_hdr.flags & SPIFFS_PH_FLAG_FINAL) ? "NOTFINAL " : "",
cur_pix);
rewrite_ix_to_this = 1;
} else {
// should not happen, destined for fubar
}
}
}
} else if (res == SPIFFS_ERR_NOT_FOUND) {
SPIFFS_CHECK_DBG("PA: corresponding ref not found, delete "_SPIPRIpg"\n", cur_pix);
delete_page = 1;
res = SPIFFS_OK;
}
if (rewrite_ix_to_this) {
// if pointing to invalid page, redirect index to this page
SPIFFS_CHECK_DBG("PA: FIXUP: rewrite index id "_SPIPRIid" data spix "_SPIPRIsp" to point to this pix: "_SPIPRIpg"\n",
p_hdr.obj_id, p_hdr.span_ix, cur_pix);
res = spiffs_rewrite_index(fs, p_hdr.obj_id, p_hdr.span_ix, cur_pix, objix_pix);
if (res <= _SPIFFS_ERR_CHECK_FIRST && res > _SPIFFS_ERR_CHECK_LAST) {
// index bad also, cannot mend this file
SPIFFS_CHECK_DBG("PA: FIXUP: index bad "_SPIPRIi", cannot mend!\n", res);
CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_DELETE_BAD_FILE, p_hdr.obj_id, 0);
res = spiffs_page_delete(fs, cur_pix);
SPIFFS_CHECK_RES(res);
res = spiffs_delete_obj_lazy(fs, p_hdr.obj_id);
} else {
CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_FIX_INDEX, p_hdr.obj_id, p_hdr.span_ix);
}
SPIFFS_CHECK_RES(res);
restart = 1;
continue;
} else if (delete_page) {
SPIFFS_CHECK_DBG("PA: FIXUP: deleting page "_SPIPRIpg"\n", cur_pix);
CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_DELETE_PAGE, cur_pix, 0);
res = spiffs_page_delete(fs, cur_pix);
}
SPIFFS_CHECK_RES(res);
}
if (bitmask == 0x2) {
// 010
SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" FREE, REFERENCED, not index\n", cur_pix);
// no op, this should be taken care of when checking valid references
}
// 011 ok - busy, referenced, not index
if (bitmask == 0x4) {
// 100
SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" FREE, unreferenced, INDEX\n", cur_pix);
// this should never happen, major fubar
}
// 101 ok - busy, unreferenced, index
if (bitmask == 0x6) {
// 110
SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" FREE, REFERENCED, INDEX\n", cur_pix);
// no op, this should be taken care of when checking valid references
}
if (bitmask == 0x7) {
// 111
SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" USED, REFERENCED, INDEX\n", cur_pix);
// no op, this should be taken care of when checking valid references
}
}
}
}
SPIFFS_CHECK_DBG("PA: processed "_SPIPRIpg", restart "_SPIPRIi"\n", pix_offset, restart);
// next page range
if (!restart) {
pix_offset += pages_per_scan;
}
} // while page range not reached end
return res;
}
// Checks consistency amongst all pages and fixes irregularities
s32_t spiffs_page_consistency_check(spiffs *fs) {
CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_PROGRESS, 0, 0);
s32_t res = spiffs_page_consistency_check_i(fs);
if (res != SPIFFS_OK) {
CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_ERROR, res, 0);
}
CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_PROGRESS, 256, 0);
return res;
}
//---------------------------------------
// Object index consistency
// searches for given object id in temporary object id index,
// returns the index or -1
static int spiffs_object_index_search(spiffs *fs, spiffs_obj_id obj_id) {
u32_t i;
spiffs_obj_id *obj_table = (spiffs_obj_id *)fs->work;
obj_id &= ~SPIFFS_OBJ_ID_IX_FLAG;
for (i = 0; i < SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(spiffs_obj_id); i++) {
if ((obj_table[i] & ~SPIFFS_OBJ_ID_IX_FLAG) == obj_id) {
return i;
}
}
return -1;
}
static s32_t spiffs_object_index_consistency_check_v(spiffs *fs, spiffs_obj_id obj_id, spiffs_block_ix cur_block,
int cur_entry, const void *user_const_p, void *user_var_p) {
(void)user_const_p;
s32_t res_c = SPIFFS_VIS_COUNTINUE;
s32_t res = SPIFFS_OK;
u32_t *log_ix = (u32_t *)user_var_p;
spiffs_obj_id *obj_table = (spiffs_obj_id *)fs->work;
CHECK_CB(fs, SPIFFS_CHECK_INDEX, SPIFFS_CHECK_PROGRESS,
(cur_block * 256) / fs->block_count, 0);
if (obj_id != SPIFFS_OBJ_ID_FREE && obj_id != SPIFFS_OBJ_ID_DELETED && (obj_id & SPIFFS_OBJ_ID_IX_FLAG)) {
spiffs_page_header p_hdr;
spiffs_page_ix cur_pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, cur_block, cur_entry);
// load header
res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t *)&p_hdr);
SPIFFS_CHECK_RES(res);
if (p_hdr.span_ix == 0 &&
(p_hdr.flags & (SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_IXDELE)) ==
(SPIFFS_PH_FLAG_DELET)) {
SPIFFS_CHECK_DBG("IX: pix "_SPIPRIpg", obj id:"_SPIPRIid" spix:"_SPIPRIsp" header not fully deleted - deleting\n",
cur_pix, obj_id, p_hdr.span_ix);
CHECK_CB(fs, SPIFFS_CHECK_INDEX, SPIFFS_CHECK_DELETE_PAGE, cur_pix, obj_id);
res = spiffs_page_delete(fs, cur_pix);
SPIFFS_CHECK_RES(res);
return res_c;
}
if ((p_hdr.flags & (SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_IXDELE)) ==
(SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_IXDELE)) {
return res_c;
}
if (p_hdr.span_ix == 0) {
// objix header page, register objid as reachable
int r = spiffs_object_index_search(fs, obj_id);
if (r == -1) {
// not registered, do it
obj_table[*log_ix] = obj_id & ~SPIFFS_OBJ_ID_IX_FLAG;
(*log_ix)++;
if (*log_ix >= SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(spiffs_obj_id)) {
*log_ix = 0;
}
}
} else { // span index
// objix page, see if header can be found
int r = spiffs_object_index_search(fs, obj_id);
u8_t delete = 0;
if (r == -1) {
// not in temporary index, try finding it
spiffs_page_ix objix_hdr_pix;
res = spiffs_obj_lu_find_id_and_span(fs, obj_id | SPIFFS_OBJ_ID_IX_FLAG, 0, 0, &objix_hdr_pix);
res_c = SPIFFS_VIS_COUNTINUE_RELOAD;
if (res == SPIFFS_OK) {
// found, register as reachable
obj_table[*log_ix] = obj_id & ~SPIFFS_OBJ_ID_IX_FLAG;
} else if (res == SPIFFS_ERR_NOT_FOUND) {
// not found, register as unreachable
delete = 1;
obj_table[*log_ix] = obj_id | SPIFFS_OBJ_ID_IX_FLAG;
} else {
SPIFFS_CHECK_RES(res);
}
(*log_ix)++;
if (*log_ix >= SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(spiffs_obj_id)) {
*log_ix = 0;
}
} else {
// in temporary index, check reachable flag
if ((obj_table[r] & SPIFFS_OBJ_ID_IX_FLAG)) {
// registered as unreachable
delete = 1;
}
}
if (delete) {
SPIFFS_CHECK_DBG("IX: FIXUP: pix "_SPIPRIpg", obj id:"_SPIPRIid" spix:"_SPIPRIsp" is orphan index - deleting\n",
cur_pix, obj_id, p_hdr.span_ix);
CHECK_CB(fs, SPIFFS_CHECK_INDEX, SPIFFS_CHECK_DELETE_ORPHANED_INDEX, cur_pix, obj_id);
res = spiffs_page_delete(fs, cur_pix);
SPIFFS_CHECK_RES(res);
}
} // span index
} // valid object index id
return res_c;
}
// Removes orphaned and partially deleted index pages.
// Scans for index pages. When an index page is found, corresponding index header is searched for.
// If no such page exists, the index page cannot be reached as no index header exists and must be
// deleted.
s32_t spiffs_object_index_consistency_check(spiffs *fs) {
s32_t res = SPIFFS_OK;
// impl note:
// fs->work is used for a temporary object index memory, listing found object ids and
// indicating whether they can be reached or not. Acting as a fifo if object ids cannot fit.
// In the temporary object index memory, SPIFFS_OBJ_ID_IX_FLAG bit is used to indicate
// a reachable/unreachable object id.
memset(fs->work, 0, SPIFFS_CFG_LOG_PAGE_SZ(fs));
u32_t obj_id_log_ix = 0;
CHECK_CB(fs, SPIFFS_CHECK_INDEX, SPIFFS_CHECK_PROGRESS, 0, 0);
res = spiffs_obj_lu_find_entry_visitor(fs, 0, 0, 0, 0, spiffs_object_index_consistency_check_v, 0, &obj_id_log_ix,
0, 0);
if (res == SPIFFS_VIS_END) {
res = SPIFFS_OK;
}
if (res != SPIFFS_OK) {
CHECK_CB(fs, SPIFFS_CHECK_INDEX, SPIFFS_CHECK_ERROR, res, 0);