-
Notifications
You must be signed in to change notification settings - Fork 167
/
Copy pathfsck.c
1154 lines (1005 loc) · 30.6 KB
/
fsck.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
#define USE_THE_REPOSITORY_VARIABLE
#include "builtin.h"
#include "gettext.h"
#include "hex.h"
#include "config.h"
#include "commit.h"
#include "tree.h"
#include "blob.h"
#include "tag.h"
#include "refs.h"
#include "pack.h"
#include "cache-tree.h"
#include "fsck.h"
#include "parse-options.h"
#include "progress.h"
#include "streaming.h"
#include "packfile.h"
#include "object-file.h"
#include "object-name.h"
#include "object-store.h"
#include "path.h"
#include "read-cache-ll.h"
#include "replace-object.h"
#include "resolve-undo.h"
#include "run-command.h"
#include "sparse-index.h"
#include "worktree.h"
#include "pack-revindex.h"
#include "pack-bitmap.h"
#define REACHABLE 0x0001
#define SEEN 0x0002
#define HAS_OBJ 0x0004
/* This flag is set if something points to this object. */
#define USED 0x0008
static int show_root;
static int show_tags;
static int show_unreachable;
static int include_reflogs = 1;
static int check_full = 1;
static int connectivity_only;
static int check_strict;
static int keep_cache_objects;
static struct fsck_options fsck_walk_options = FSCK_OPTIONS_DEFAULT;
static struct fsck_options fsck_obj_options = FSCK_OPTIONS_DEFAULT;
static int errors_found;
static int write_lost_and_found;
static int verbose;
static int show_progress = -1;
static int show_dangling = 1;
static int name_objects;
static int check_references = 1;
#define ERROR_OBJECT 01
#define ERROR_REACHABLE 02
#define ERROR_PACK 04
#define ERROR_REFS 010
#define ERROR_COMMIT_GRAPH 020
#define ERROR_MULTI_PACK_INDEX 040
#define ERROR_PACK_REV_INDEX 0100
#define ERROR_BITMAP 0200
static const char *describe_object(const struct object_id *oid)
{
return fsck_describe_object(&fsck_walk_options, oid);
}
static const char *printable_type(const struct object_id *oid,
enum object_type type)
{
const char *ret;
if (type == OBJ_NONE)
type = oid_object_info(the_repository, oid, NULL);
ret = type_name(type);
if (!ret)
ret = _("unknown");
return ret;
}
static int objerror(struct object *obj, const char *err)
{
errors_found |= ERROR_OBJECT;
/* TRANSLATORS: e.g. error in tree 01bfda: <more explanation> */
fprintf_ln(stderr, _("error in %s %s: %s"),
printable_type(&obj->oid, obj->type),
describe_object(&obj->oid), err);
return -1;
}
static int fsck_objects_error_func(struct fsck_options *o UNUSED,
void *fsck_report,
enum fsck_msg_type msg_type,
enum fsck_msg_id msg_id UNUSED,
const char *message)
{
struct fsck_object_report *report = fsck_report;
const struct object_id *oid = report->oid;
enum object_type object_type = report->object_type;
switch (msg_type) {
case FSCK_WARN:
/* TRANSLATORS: e.g. warning in tree 01bfda: <more explanation> */
fprintf_ln(stderr, _("warning in %s %s: %s"),
printable_type(oid, object_type),
describe_object(oid), message);
return 0;
case FSCK_ERROR:
/* TRANSLATORS: e.g. error in tree 01bfda: <more explanation> */
fprintf_ln(stderr, _("error in %s %s: %s"),
printable_type(oid, object_type),
describe_object(oid), message);
return 1;
default:
BUG("%d (FSCK_IGNORE?) should never trigger this callback",
msg_type);
}
}
static struct object_array pending;
static int mark_object(struct object *obj, enum object_type type,
void *data, struct fsck_options *options UNUSED)
{
struct object *parent = data;
/*
* The only case data is NULL or type is OBJ_ANY is when
* mark_object_reachable() calls us. All the callers of
* that function has non-NULL obj hence ...
*/
if (!obj) {
/* ... these references to parent->fld are safe here */
printf_ln(_("broken link from %7s %s"),
printable_type(&parent->oid, parent->type),
describe_object(&parent->oid));
printf_ln(_("broken link from %7s %s"),
(type == OBJ_ANY ? _("unknown") : type_name(type)),
_("unknown"));
errors_found |= ERROR_REACHABLE;
return 1;
}
if (type != OBJ_ANY && obj->type != type)
/* ... and the reference to parent is safe here */
objerror(parent, _("wrong object type in link"));
if (obj->flags & REACHABLE)
return 0;
obj->flags |= REACHABLE;
if (is_promisor_object(the_repository, &obj->oid))
/*
* Further recursion does not need to be performed on this
* object since it is a promisor object (so it does not need to
* be added to "pending").
*/
return 0;
if (!(obj->flags & HAS_OBJ)) {
if (parent && !has_object(the_repository, &obj->oid, 1)) {
printf_ln(_("broken link from %7s %s\n"
" to %7s %s"),
printable_type(&parent->oid, parent->type),
describe_object(&parent->oid),
printable_type(&obj->oid, obj->type),
describe_object(&obj->oid));
errors_found |= ERROR_REACHABLE;
}
return 1;
}
add_object_array(obj, NULL, &pending);
return 0;
}
static void mark_object_reachable(struct object *obj)
{
mark_object(obj, OBJ_ANY, NULL, NULL);
}
static int traverse_one_object(struct object *obj)
{
int result = fsck_walk(obj, obj, &fsck_walk_options);
if (obj->type == OBJ_TREE) {
struct tree *tree = (struct tree *)obj;
free_tree_buffer(tree);
}
return result;
}
static int traverse_reachable(void)
{
struct progress *progress = NULL;
unsigned int nr = 0;
int result = 0;
if (show_progress)
progress = start_delayed_progress(the_repository,
_("Checking connectivity"), 0);
while (pending.nr) {
result |= traverse_one_object(object_array_pop(&pending));
display_progress(progress, ++nr);
}
stop_progress(&progress);
return !!result;
}
static int mark_used(struct object *obj, enum object_type type UNUSED,
void *data UNUSED, struct fsck_options *options UNUSED)
{
if (!obj)
return 1;
obj->flags |= USED;
return 0;
}
static void mark_unreachable_referents(const struct object_id *oid)
{
struct fsck_options options = FSCK_OPTIONS_DEFAULT;
struct object *obj = lookup_object(the_repository, oid);
if (!obj || !(obj->flags & HAS_OBJ))
return; /* not part of our original set */
if (obj->flags & REACHABLE)
return; /* reachable objects already traversed */
/*
* Avoid passing OBJ_NONE to fsck_walk, which will parse the object
* (and we want to avoid parsing blobs).
*/
if (obj->type == OBJ_NONE) {
enum object_type type = oid_object_info(the_repository,
&obj->oid, NULL);
if (type > 0)
object_as_type(obj, type, 0);
}
options.walk = mark_used;
fsck_walk(obj, NULL, &options);
if (obj->type == OBJ_TREE)
free_tree_buffer((struct tree *)obj);
}
static int mark_loose_unreachable_referents(const struct object_id *oid,
const char *path UNUSED,
void *data UNUSED)
{
mark_unreachable_referents(oid);
return 0;
}
static int mark_packed_unreachable_referents(const struct object_id *oid,
struct packed_git *pack UNUSED,
uint32_t pos UNUSED,
void *data UNUSED)
{
mark_unreachable_referents(oid);
return 0;
}
/*
* Check a single reachable object
*/
static void check_reachable_object(struct object *obj)
{
/*
* We obviously want the object to be parsed,
* except if it was in a pack-file and we didn't
* do a full fsck
*/
if (!(obj->flags & HAS_OBJ)) {
if (is_promisor_object(the_repository, &obj->oid))
return;
if (has_object_pack(the_repository, &obj->oid))
return; /* it is in pack - forget about it */
printf_ln(_("missing %s %s"),
printable_type(&obj->oid, obj->type),
describe_object(&obj->oid));
errors_found |= ERROR_REACHABLE;
return;
}
}
/*
* Check a single unreachable object
*/
static void check_unreachable_object(struct object *obj)
{
/*
* Missing unreachable object? Ignore it. It's not like
* we miss it (since it can't be reached), nor do we want
* to complain about it being unreachable (since it does
* not exist).
*/
if (!(obj->flags & HAS_OBJ))
return;
/*
* Unreachable object that exists? Show it if asked to,
* since this is something that is prunable.
*/
if (show_unreachable) {
printf_ln(_("unreachable %s %s"),
printable_type(&obj->oid, obj->type),
describe_object(&obj->oid));
return;
}
/*
* "!USED" means that nothing at all points to it, including
* other unreachable objects. In other words, it's the "tip"
* of some set of unreachable objects, usually a commit that
* got dropped.
*
* Such starting points are more interesting than some random
* set of unreachable objects, so we show them even if the user
* hasn't asked for _all_ unreachable objects. If you have
* deleted a branch by mistake, this is a prime candidate to
* start looking at, for example.
*/
if (!(obj->flags & USED)) {
if (show_dangling)
printf_ln(_("dangling %s %s"),
printable_type(&obj->oid, obj->type),
describe_object(&obj->oid));
if (write_lost_and_found) {
char *filename = repo_git_path(the_repository, "lost-found/%s/%s",
obj->type == OBJ_COMMIT ? "commit" : "other",
describe_object(&obj->oid));
FILE *f;
if (safe_create_leading_directories_const(the_repository, filename)) {
error(_("could not create lost-found"));
free(filename);
return;
}
f = xfopen(filename, "w");
if (obj->type == OBJ_BLOB) {
if (stream_blob_to_fd(fileno(f), &obj->oid, NULL, 1))
die_errno(_("could not write '%s'"), filename);
} else
fprintf(f, "%s\n", describe_object(&obj->oid));
if (fclose(f))
die_errno(_("could not finish '%s'"),
filename);
free(filename);
}
return;
}
/*
* Otherwise? It's there, it's unreachable, and some other unreachable
* object points to it. Ignore it - it's not interesting, and we showed
* all the interesting cases above.
*/
}
static void check_object(struct object *obj)
{
if (verbose)
fprintf_ln(stderr, _("Checking %s"), describe_object(&obj->oid));
if (obj->flags & REACHABLE)
check_reachable_object(obj);
else
check_unreachable_object(obj);
}
static void check_connectivity(void)
{
int i, max;
/* Traverse the pending reachable objects */
traverse_reachable();
/*
* With --connectivity-only, we won't have actually opened and marked
* unreachable objects with USED. Do that now to make --dangling, etc
* accurate.
*/
if (connectivity_only && (show_dangling || write_lost_and_found)) {
/*
* Even though we already have a "struct object" for each of
* these in memory, we must not iterate over the internal
* object hash as we do below. Our loop would potentially
* resize the hash, making our iteration invalid.
*
* Instead, we'll just go back to the source list of objects,
* and ignore any that weren't present in our earlier
* traversal.
*/
for_each_loose_object(mark_loose_unreachable_referents, NULL, 0);
for_each_packed_object(the_repository,
mark_packed_unreachable_referents,
NULL,
0);
}
/* Look up all the requirements, warn about missing objects.. */
max = get_max_object_index(the_repository);
if (verbose)
fprintf_ln(stderr, _("Checking connectivity (%d objects)"), max);
for (i = 0; i < max; i++) {
struct object *obj = get_indexed_object(the_repository, i);
if (obj)
check_object(obj);
}
}
static int fsck_obj(struct object *obj, void *buffer, unsigned long size)
{
int err;
if (obj->flags & SEEN)
return 0;
obj->flags |= SEEN;
if (verbose)
fprintf_ln(stderr, _("Checking %s %s"),
printable_type(&obj->oid, obj->type),
describe_object(&obj->oid));
if (fsck_walk(obj, NULL, &fsck_obj_options))
objerror(obj, _("broken links"));
err = fsck_object(obj, buffer, size, &fsck_obj_options);
if (err)
goto out;
if (obj->type == OBJ_COMMIT) {
struct commit *commit = (struct commit *) obj;
if (!commit->parents && show_root)
printf_ln(_("root %s"),
describe_object(&commit->object.oid));
}
if (obj->type == OBJ_TAG) {
struct tag *tag = (struct tag *) obj;
if (show_tags && tag->tagged) {
printf_ln(_("tagged %s %s (%s) in %s"),
printable_type(&tag->tagged->oid, tag->tagged->type),
describe_object(&tag->tagged->oid),
tag->tag,
describe_object(&tag->object.oid));
}
}
out:
if (obj->type == OBJ_TREE)
free_tree_buffer((struct tree *)obj);
return err;
}
static int fsck_obj_buffer(const struct object_id *oid, enum object_type type,
unsigned long size, void *buffer, int *eaten)
{
/*
* Note, buffer may be NULL if type is OBJ_BLOB. See
* verify_packfile(), data_valid variable for details.
*/
struct object *obj;
obj = parse_object_buffer(the_repository, oid, type, size, buffer,
eaten);
if (!obj) {
errors_found |= ERROR_OBJECT;
return error(_("%s: object corrupt or missing"),
oid_to_hex(oid));
}
obj->flags &= ~(REACHABLE | SEEN);
obj->flags |= HAS_OBJ;
return fsck_obj(obj, buffer, size);
}
static int default_refs;
static void fsck_handle_reflog_oid(const char *refname, struct object_id *oid,
timestamp_t timestamp)
{
struct object *obj;
if (!is_null_oid(oid)) {
obj = lookup_object(the_repository, oid);
if (obj && (obj->flags & HAS_OBJ)) {
if (timestamp)
fsck_put_object_name(&fsck_walk_options, oid,
"%s@{%"PRItime"}",
refname, timestamp);
obj->flags |= USED;
mark_object_reachable(obj);
} else if (!is_promisor_object(the_repository, oid)) {
error(_("%s: invalid reflog entry %s"),
refname, oid_to_hex(oid));
errors_found |= ERROR_REACHABLE;
}
}
}
static int fsck_handle_reflog_ent(struct object_id *ooid, struct object_id *noid,
const char *email UNUSED,
timestamp_t timestamp, int tz UNUSED,
const char *message UNUSED, void *cb_data)
{
const char *refname = cb_data;
if (verbose)
fprintf_ln(stderr, _("Checking reflog %s->%s"),
oid_to_hex(ooid), oid_to_hex(noid));
fsck_handle_reflog_oid(refname, ooid, 0);
fsck_handle_reflog_oid(refname, noid, timestamp);
return 0;
}
static int fsck_handle_reflog(const char *logname, void *cb_data)
{
struct strbuf refname = STRBUF_INIT;
strbuf_worktree_ref(cb_data, &refname, logname);
refs_for_each_reflog_ent(get_main_ref_store(the_repository),
refname.buf, fsck_handle_reflog_ent,
refname.buf);
strbuf_release(&refname);
return 0;
}
static int fsck_handle_ref(const char *refname, const char *referent UNUSED, const struct object_id *oid,
int flag UNUSED, void *cb_data UNUSED)
{
struct object *obj;
obj = parse_object(the_repository, oid);
if (!obj) {
if (is_promisor_object(the_repository, oid)) {
/*
* Increment default_refs anyway, because this is a
* valid ref.
*/
default_refs++;
return 0;
}
error(_("%s: invalid sha1 pointer %s"),
refname, oid_to_hex(oid));
errors_found |= ERROR_REACHABLE;
/* We'll continue with the rest despite the error.. */
return 0;
}
if (obj->type != OBJ_COMMIT && is_branch(refname)) {
error(_("%s: not a commit"), refname);
errors_found |= ERROR_REFS;
}
default_refs++;
obj->flags |= USED;
fsck_put_object_name(&fsck_walk_options,
oid, "%s", refname);
mark_object_reachable(obj);
return 0;
}
static int fsck_head_link(const char *head_ref_name,
const char **head_points_at,
struct object_id *head_oid);
static void get_default_heads(void)
{
struct worktree **worktrees, **p;
const char *head_points_at;
struct object_id head_oid;
refs_for_each_rawref(get_main_ref_store(the_repository),
fsck_handle_ref, NULL);
worktrees = get_worktrees();
for (p = worktrees; *p; p++) {
struct worktree *wt = *p;
struct strbuf ref = STRBUF_INIT;
strbuf_worktree_ref(wt, &ref, "HEAD");
fsck_head_link(ref.buf, &head_points_at, &head_oid);
if (head_points_at && !is_null_oid(&head_oid))
fsck_handle_ref(ref.buf, NULL, &head_oid, 0, NULL);
strbuf_release(&ref);
if (include_reflogs)
refs_for_each_reflog(get_worktree_ref_store(wt),
fsck_handle_reflog, wt);
}
free_worktrees(worktrees);
/*
* Not having any default heads isn't really fatal, but
* it does mean that "--unreachable" no longer makes any
* sense (since in this case everything will obviously
* be unreachable by definition.
*
* Showing dangling objects is valid, though (as those
* dangling objects are likely lost heads).
*
* So we just print a warning about it, and clear the
* "show_unreachable" flag.
*/
if (!default_refs) {
fprintf_ln(stderr, _("notice: No default references"));
show_unreachable = 0;
}
}
struct for_each_loose_cb
{
struct progress *progress;
struct strbuf obj_type;
};
static int fsck_loose(const struct object_id *oid, const char *path, void *data)
{
struct for_each_loose_cb *cb_data = data;
struct object *obj;
enum object_type type = OBJ_NONE;
unsigned long size;
void *contents = NULL;
int eaten;
struct object_info oi = OBJECT_INFO_INIT;
struct object_id real_oid = *null_oid(the_hash_algo);
int err = 0;
strbuf_reset(&cb_data->obj_type);
oi.type_name = &cb_data->obj_type;
oi.sizep = &size;
oi.typep = &type;
if (read_loose_object(path, oid, &real_oid, &contents, &oi) < 0) {
if (contents && !oideq(&real_oid, oid))
err = error(_("%s: hash-path mismatch, found at: %s"),
oid_to_hex(&real_oid), path);
else
err = error(_("%s: object corrupt or missing: %s"),
oid_to_hex(oid), path);
}
if (type != OBJ_NONE && type < 0)
err = error(_("%s: object is of unknown type '%s': %s"),
oid_to_hex(&real_oid), cb_data->obj_type.buf,
path);
if (err < 0) {
errors_found |= ERROR_OBJECT;
free(contents);
return 0; /* keep checking other objects */
}
if (!contents && type != OBJ_BLOB)
BUG("read_loose_object streamed a non-blob");
obj = parse_object_buffer(the_repository, oid, type, size,
contents, &eaten);
if (!obj) {
errors_found |= ERROR_OBJECT;
error(_("%s: object could not be parsed: %s"),
oid_to_hex(oid), path);
if (!eaten)
free(contents);
return 0; /* keep checking other objects */
}
obj->flags &= ~(REACHABLE | SEEN);
obj->flags |= HAS_OBJ;
if (fsck_obj(obj, contents, size))
errors_found |= ERROR_OBJECT;
if (!eaten)
free(contents);
return 0; /* keep checking other objects, even if we saw an error */
}
static int fsck_cruft(const char *basename, const char *path,
void *data UNUSED)
{
if (!starts_with(basename, "tmp_obj_"))
fprintf_ln(stderr, _("bad sha1 file: %s"), path);
return 0;
}
static int fsck_subdir(unsigned int nr, const char *path UNUSED, void *data)
{
struct for_each_loose_cb *cb_data = data;
struct progress *progress = cb_data->progress;
display_progress(progress, nr + 1);
return 0;
}
static void fsck_object_dir(const char *path)
{
struct progress *progress = NULL;
struct for_each_loose_cb cb_data = {
.obj_type = STRBUF_INIT,
.progress = progress,
};
if (verbose)
fprintf_ln(stderr, _("Checking object directory"));
if (show_progress)
progress = start_progress(the_repository,
_("Checking object directories"), 256);
for_each_loose_file_in_objdir(path, fsck_loose, fsck_cruft, fsck_subdir,
&cb_data);
display_progress(progress, 256);
stop_progress(&progress);
strbuf_release(&cb_data.obj_type);
}
static int fsck_head_link(const char *head_ref_name,
const char **head_points_at,
struct object_id *head_oid)
{
int null_is_error = 0;
if (verbose)
fprintf_ln(stderr, _("Checking %s link"), head_ref_name);
*head_points_at = refs_resolve_ref_unsafe(get_main_ref_store(the_repository),
head_ref_name, 0, head_oid,
NULL);
if (!*head_points_at) {
errors_found |= ERROR_REFS;
return error(_("invalid %s"), head_ref_name);
}
if (!strcmp(*head_points_at, head_ref_name))
/* detached HEAD */
null_is_error = 1;
else if (!starts_with(*head_points_at, "refs/heads/")) {
errors_found |= ERROR_REFS;
return error(_("%s points to something strange (%s)"),
head_ref_name, *head_points_at);
}
if (is_null_oid(head_oid)) {
if (null_is_error) {
errors_found |= ERROR_REFS;
return error(_("%s: detached HEAD points at nothing"),
head_ref_name);
}
fprintf_ln(stderr,
_("notice: %s points to an unborn branch (%s)"),
head_ref_name, *head_points_at + 11);
}
return 0;
}
static int fsck_cache_tree(struct cache_tree *it, const char *index_path)
{
int i;
int err = 0;
if (verbose)
fprintf_ln(stderr, _("Checking cache tree of %s"), index_path);
if (0 <= it->entry_count) {
struct object *obj = parse_object(the_repository, &it->oid);
if (!obj) {
error(_("%s: invalid sha1 pointer in cache-tree of %s"),
oid_to_hex(&it->oid), index_path);
errors_found |= ERROR_REFS;
return 1;
}
obj->flags |= USED;
fsck_put_object_name(&fsck_walk_options, &it->oid, ":");
mark_object_reachable(obj);
if (obj->type != OBJ_TREE)
err |= objerror(obj, _("non-tree in cache-tree"));
}
for (i = 0; i < it->subtree_nr; i++)
err |= fsck_cache_tree(it->down[i]->cache_tree, index_path);
return err;
}
static int fsck_resolve_undo(struct index_state *istate,
const char *index_path)
{
struct string_list_item *item;
struct string_list *resolve_undo = istate->resolve_undo;
if (!resolve_undo)
return 0;
for_each_string_list_item(item, resolve_undo) {
const char *path = item->string;
struct resolve_undo_info *ru = item->util;
int i;
if (!ru)
continue;
for (i = 0; i < 3; i++) {
struct object *obj;
if (!ru->mode[i] || !S_ISREG(ru->mode[i]))
continue;
obj = parse_object(the_repository, &ru->oid[i]);
if (!obj) {
error(_("%s: invalid sha1 pointer in resolve-undo of %s"),
oid_to_hex(&ru->oid[i]),
index_path);
errors_found |= ERROR_REFS;
continue;
}
obj->flags |= USED;
fsck_put_object_name(&fsck_walk_options, &ru->oid[i],
":(%d):%s", i, path);
mark_object_reachable(obj);
}
}
return 0;
}
static void fsck_index(struct index_state *istate, const char *index_path,
int is_current_worktree)
{
unsigned int i;
/* TODO: audit for interaction with sparse-index. */
ensure_full_index(istate);
for (i = 0; i < istate->cache_nr; i++) {
unsigned int mode;
struct blob *blob;
struct object *obj;
mode = istate->cache[i]->ce_mode;
if (S_ISGITLINK(mode))
continue;
blob = lookup_blob(the_repository,
&istate->cache[i]->oid);
if (!blob)
continue;
obj = &blob->object;
obj->flags |= USED;
fsck_put_object_name(&fsck_walk_options, &obj->oid,
"%s:%s",
is_current_worktree ? "" : index_path,
istate->cache[i]->name);
mark_object_reachable(obj);
}
if (istate->cache_tree)
fsck_cache_tree(istate->cache_tree, index_path);
fsck_resolve_undo(istate, index_path);
}
static void mark_object_for_connectivity(const struct object_id *oid)
{
struct object *obj = lookup_unknown_object(the_repository, oid);
obj->flags |= HAS_OBJ;
}
static int mark_loose_for_connectivity(const struct object_id *oid,
const char *path UNUSED,
void *data UNUSED)
{
mark_object_for_connectivity(oid);
return 0;
}
static int mark_packed_for_connectivity(const struct object_id *oid,
struct packed_git *pack UNUSED,
uint32_t pos UNUSED,
void *data UNUSED)
{
mark_object_for_connectivity(oid);
return 0;
}
static int check_pack_rev_indexes(struct repository *r, int show_progress)
{
struct progress *progress = NULL;
uint32_t pack_count = 0;
int res = 0;
if (show_progress) {
for (struct packed_git *p = get_all_packs(r); p; p = p->next)
pack_count++;
progress = start_delayed_progress(the_repository,
"Verifying reverse pack-indexes", pack_count);
pack_count = 0;
}
for (struct packed_git *p = get_all_packs(r); p; p = p->next) {
int load_error = load_pack_revindex_from_disk(p);
if (load_error < 0) {
error(_("unable to load rev-index for pack '%s'"), p->pack_name);
res = ERROR_PACK_REV_INDEX;
} else if (!load_error &&
!load_pack_revindex(r, p) &&
verify_pack_revindex(p)) {
error(_("invalid rev-index for pack '%s'"), p->pack_name);
res = ERROR_PACK_REV_INDEX;
}
display_progress(progress, ++pack_count);
}
stop_progress(&progress);
return res;
}
static void fsck_refs(struct repository *r)
{
struct child_process refs_verify = CHILD_PROCESS_INIT;
struct progress *progress = NULL;
if (show_progress)
progress = start_progress(r, _("Checking ref database"), 1);
if (verbose)
fprintf_ln(stderr, _("Checking ref database"));
child_process_init(&refs_verify);
refs_verify.git_cmd = 1;
strvec_pushl(&refs_verify.args, "refs", "verify", NULL);
if (verbose)
strvec_push(&refs_verify.args, "--verbose");
if (check_strict)
strvec_push(&refs_verify.args, "--strict");
if (run_command(&refs_verify))
errors_found |= ERROR_REFS;
display_progress(progress, 1);
stop_progress(&progress);
}
static char const * const fsck_usage[] = {
N_("git fsck [--tags] [--root] [--unreachable] [--cache] [--no-reflogs]\n"
" [--[no-]full] [--strict] [--verbose] [--lost-found]\n"
" [--[no-]dangling] [--[no-]progress] [--connectivity-only]\n"
" [--[no-]name-objects] [--[no-]references] [<object>...]"),
NULL
};
static struct option fsck_opts[] = {
OPT__VERBOSE(&verbose, N_("be verbose")),
OPT_BOOL(0, "unreachable", &show_unreachable, N_("show unreachable objects")),
OPT_BOOL(0, "dangling", &show_dangling, N_("show dangling objects")),
OPT_BOOL(0, "tags", &show_tags, N_("report tags")),
OPT_BOOL(0, "root", &show_root, N_("report root nodes")),
OPT_BOOL(0, "cache", &keep_cache_objects, N_("make index objects head nodes")),
OPT_BOOL(0, "reflogs", &include_reflogs, N_("make reflogs head nodes (default)")),
OPT_BOOL(0, "full", &check_full, N_("also consider packs and alternate objects")),
OPT_BOOL(0, "connectivity-only", &connectivity_only, N_("check only connectivity")),
OPT_BOOL(0, "strict", &check_strict, N_("enable more strict checking")),
OPT_BOOL(0, "lost-found", &write_lost_and_found,
N_("write dangling objects in .git/lost-found")),
OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
OPT_BOOL(0, "name-objects", &name_objects, N_("show verbose names for reachable objects")),
OPT_BOOL(0, "references", &check_references, N_("check reference database consistency")),
OPT_END(),
};
int cmd_fsck(int argc,
const char **argv,
const char *prefix,
struct repository *repo UNUSED)
{
int i;
struct object_directory *odb;
/* fsck knows how to handle missing promisor objects */
fetch_if_missing = 0;
errors_found = 0;
disable_replace_refs();
save_commit_buffer = 0;
argc = parse_options(argc, argv, prefix, fsck_opts, fsck_usage, 0);
fsck_walk_options.walk = mark_object;
fsck_obj_options.walk = mark_used;
fsck_obj_options.error_func = fsck_objects_error_func;
if (check_strict)
fsck_obj_options.strict = 1;
if (show_progress == -1)
show_progress = isatty(2);
if (verbose)
show_progress = 0;
if (write_lost_and_found) {
check_full = 1;
include_reflogs = 0;
}
if (name_objects)
fsck_enable_object_names(&fsck_walk_options);
git_config(git_fsck_config, &fsck_obj_options);
prepare_repo_settings(the_repository);