object-store: move packed_git and packed_git_mru to object store
[git/git.git] / builtin / fsck.c
CommitLineData
baffc0e7 1#include "builtin.h"
4b182421 2#include "cache.h"
031dc927 3#include "repository.h"
b2141fc1 4#include "config.h"
ff5ebe39
DB
5#include "commit.h"
6#include "tree.h"
7#include "blob.h"
c418eda4 8#include "tag.h"
944d8589 9#include "refs.h"
f9253394 10#include "pack.h"
53dc3f3e 11#include "cache-tree.h"
e9a95bef 12#include "tree-walk.h"
271b8d25 13#include "fsck.h"
5ac0a206 14#include "parse-options.h"
8ca12c0d 15#include "dir.h"
1e49f22f 16#include "progress.h"
6f7f3beb 17#include "streaming.h"
90cf590f 18#include "decorate.h"
0317f455 19#include "packfile.h"
0d4a1321 20#include "object-store.h"
ff5ebe39
DB
21
22#define REACHABLE 0x0001
2d9c58c6 23#define SEEN 0x0002
6e454b9a 24#define HAS_OBJ 0x0004
092c55d0
JT
25/* This flag is set if something points to this object. */
26#define USED 0x0008
d9839e03 27
96f1e58f
DR
28static int show_root;
29static int show_tags;
30static int show_unreachable;
566842f6 31static int include_reflogs = 1;
f29cd393 32static int check_full = 1;
02976bf8 33static int connectivity_only;
96f1e58f
DR
34static int check_strict;
35static int keep_cache_objects;
22410549
JS
36static struct fsck_options fsck_walk_options = FSCK_OPTIONS_DEFAULT;
37static struct fsck_options fsck_obj_options = FSCK_OPTIONS_DEFAULT;
635b99a0 38static struct object_id head_oid;
469e2ebf 39static const char *head_points_at;
e2b4f635 40static int errors_found;
68f6c019 41static int write_lost_and_found;
20f1eb6b 42static int verbose;
1e49f22f 43static int show_progress = -1;
c6a13b2c 44static int show_dangling = 1;
90cf590f 45static int name_objects;
e2b4f635
JH
46#define ERROR_OBJECT 01
47#define ERROR_REACHABLE 02
a3ed7552 48#define ERROR_PACK 04
122f76f5 49#define ERROR_REFS 010
d9839e03 50
993a21b0
JS
51static const char *describe_object(struct object *obj)
52{
90cf590f
JS
53 static struct strbuf buf = STRBUF_INIT;
54 char *name = name_objects ?
55 lookup_decoration(fsck_walk_options.object_names, obj) : NULL;
56
57 strbuf_reset(&buf);
58 strbuf_addstr(&buf, oid_to_hex(&obj->oid));
59 if (name)
60 strbuf_addf(&buf, " (%s)", name);
61
62 return buf.buf;
993a21b0
JS
63}
64
97ca7ca8
JK
65static const char *printable_type(struct object *obj)
66{
67 const char *ret;
68
a2b22854
JK
69 if (obj->type == OBJ_NONE) {
70 enum object_type type = sha1_object_info(obj->oid.hash, NULL);
71 if (type > 0)
72 object_as_type(obj, type, 0);
73 }
74
97ca7ca8
JK
75 ret = typename(obj->type);
76 if (!ret)
77 ret = "unknown";
78
79 return ret;
80}
81
2becf00f 82static int fsck_config(const char *var, const char *value, void *cb)
f1f0d088 83{
1335f732
JS
84 if (strcmp(var, "fsck.skiplist") == 0) {
85 const char *path;
86 struct strbuf sb = STRBUF_INIT;
87
88 if (git_config_pathname(&path, var, value))
89 return 1;
90 strbuf_addf(&sb, "skiplist=%s", path);
91 free((char *)path);
92 fsck_set_msg_types(&fsck_obj_options, sb.buf);
93 strbuf_release(&sb);
94 return 0;
95 }
96
2becf00f
JS
97 if (skip_prefix(var, "fsck.", &var)) {
98 fsck_set_msg_type(&fsck_obj_options, var, value);
99 return 0;
100 }
101
102 return git_default_config(var, value, cb);
103}
104
c99ba492
JS
105static void objreport(struct object *obj, const char *msg_type,
106 const char *err)
f1f0d088 107{
c99ba492 108 fprintf(stderr, "%s in %s %s: %s\n",
97ca7ca8 109 msg_type, printable_type(obj), describe_object(obj), err);
f1f0d088
PB
110}
111
c99ba492 112static int objerror(struct object *obj, const char *err)
f1f0d088 113{
e2b4f635 114 errors_found |= ERROR_OBJECT;
c99ba492 115 objreport(obj, "error", err);
f1f0d088
PB
116 return -1;
117}
118
1cd772cc
JS
119static int fsck_error_func(struct fsck_options *o,
120 struct object *obj, int type, const char *message)
f1f0d088 121{
c99ba492 122 objreport(obj, (type == FSCK_WARN) ? "warning" : "error", message);
ba002f3b 123 return (type == FSCK_WARN) ? 0 : 1;
f1f0d088
PB
124}
125
04d39759
LT
126static struct object_array pending;
127
22410549 128static int mark_object(struct object *obj, int type, void *data, struct fsck_options *options)
271b8d25 129{
271b8d25 130 struct object *parent = data;
271b8d25 131
a1cdc251
JH
132 /*
133 * The only case data is NULL or type is OBJ_ANY is when
134 * mark_object_reachable() calls us. All the callers of
135 * that function has non-NULL obj hence ...
136 */
271b8d25 137 if (!obj) {
a1cdc251 138 /* ... these references to parent->fld are safe here */
271b8d25 139 printf("broken link from %7s %s\n",
97ca7ca8 140 printable_type(parent), describe_object(parent));
271b8d25
MK
141 printf("broken link from %7s %s\n",
142 (type == OBJ_ANY ? "unknown" : typename(type)), "unknown");
143 errors_found |= ERROR_REACHABLE;
144 return 1;
145 }
146
147 if (type != OBJ_ANY && obj->type != type)
a1cdc251 148 /* ... and the reference to parent is safe here */
271b8d25
MK
149 objerror(parent, "wrong object type in link");
150
151 if (obj->flags & REACHABLE)
152 return 0;
153 obj->flags |= REACHABLE;
caba7fc3
JT
154
155 if (is_promisor_object(&obj->oid))
156 /*
157 * Further recursion does not need to be performed on this
158 * object since it is a promisor object (so it does not need to
159 * be added to "pending").
160 */
161 return 0;
162
6e454b9a 163 if (!(obj->flags & HAS_OBJ)) {
f2fd0760 164 if (parent && !has_object_file(&obj->oid)) {
271b8d25 165 printf("broken link from %7s %s\n",
97ca7ca8 166 printable_type(parent), describe_object(parent));
271b8d25 167 printf(" to %7s %s\n",
97ca7ca8 168 printable_type(obj), describe_object(obj));
271b8d25
MK
169 errors_found |= ERROR_REACHABLE;
170 }
171 return 1;
172 }
173
16aa3bfc 174 add_object_array(obj, NULL, &pending);
04d39759
LT
175 return 0;
176}
177
178static void mark_object_reachable(struct object *obj)
179{
22410549 180 mark_object(obj, OBJ_ANY, NULL, NULL);
04d39759
LT
181}
182
a1cdc251 183static int traverse_one_object(struct object *obj)
04d39759 184{
ad2db403 185 return fsck_walk(obj, obj, &fsck_walk_options);
271b8d25
MK
186}
187
04d39759 188static int traverse_reachable(void)
271b8d25 189{
1e49f22f
NTND
190 struct progress *progress = NULL;
191 unsigned int nr = 0;
04d39759 192 int result = 0;
1e49f22f 193 if (show_progress)
8aade107 194 progress = start_delayed_progress(_("Checking connectivity"), 0);
04d39759 195 while (pending.nr) {
71992039 196 result |= traverse_one_object(object_array_pop(&pending));
1e49f22f 197 display_progress(progress, ++nr);
04d39759 198 }
1e49f22f 199 stop_progress(&progress);
04d39759 200 return !!result;
271b8d25
MK
201}
202
22410549 203static int mark_used(struct object *obj, int type, void *data, struct fsck_options *options)
271b8d25
MK
204{
205 if (!obj)
206 return 1;
092c55d0 207 obj->flags |= USED;
271b8d25 208 return 0;
f1f0d088
PB
209}
210
18af29f2
LT
211/*
212 * Check a single reachable object
213 */
214static void check_reachable_object(struct object *obj)
215{
18af29f2
LT
216 /*
217 * We obviously want the object to be parsed,
218 * except if it was in a pack-file and we didn't
219 * do a full fsck
220 */
6e454b9a 221 if (!(obj->flags & HAS_OBJ)) {
caba7fc3
JT
222 if (is_promisor_object(&obj->oid))
223 return;
ed1c9977 224 if (has_sha1_pack(obj->oid.hash))
18af29f2 225 return; /* it is in pack - forget about it */
97ca7ca8 226 printf("missing %s %s\n", printable_type(obj),
993a21b0 227 describe_object(obj));
e2b4f635 228 errors_found |= ERROR_REACHABLE;
18af29f2
LT
229 return;
230 }
18af29f2
LT
231}
232
233/*
234 * Check a single unreachable object
235 */
236static void check_unreachable_object(struct object *obj)
237{
238 /*
239 * Missing unreachable object? Ignore it. It's not like
240 * we miss it (since it can't be reached), nor do we want
241 * to complain about it being unreachable (since it does
242 * not exist).
243 */
b4584e4f 244 if (!(obj->flags & HAS_OBJ))
18af29f2
LT
245 return;
246
247 /*
248 * Unreachable object that exists? Show it if asked to,
249 * since this is something that is prunable.
250 */
251 if (show_unreachable) {
97ca7ca8 252 printf("unreachable %s %s\n", printable_type(obj),
993a21b0 253 describe_object(obj));
18af29f2
LT
254 return;
255 }
256
257 /*
092c55d0 258 * "!USED" means that nothing at all points to it, including
3dff5379 259 * other unreachable objects. In other words, it's the "tip"
18af29f2
LT
260 * of some set of unreachable objects, usually a commit that
261 * got dropped.
262 *
263 * Such starting points are more interesting than some random
264 * set of unreachable objects, so we show them even if the user
265 * hasn't asked for _all_ unreachable objects. If you have
266 * deleted a branch by mistake, this is a prime candidate to
267 * start looking at, for example.
268 */
092c55d0 269 if (!(obj->flags & USED)) {
c6a13b2c 270 if (show_dangling)
97ca7ca8 271 printf("dangling %s %s\n", printable_type(obj),
993a21b0 272 describe_object(obj));
68f6c019 273 if (write_lost_and_found) {
fcd12db6 274 char *filename = git_pathdup("lost-found/%s/%s",
68f6c019 275 obj->type == OBJ_COMMIT ? "commit" : "other",
993a21b0 276 describe_object(obj));
68f6c019
JS
277 FILE *f;
278
dcf69262 279 if (safe_create_leading_directories_const(filename)) {
68f6c019 280 error("Could not create lost-found");
fcd12db6 281 free(filename);
68f6c019
JS
282 return;
283 }
23a9e071 284 f = xfopen(filename, "w");
16a7fcfe 285 if (obj->type == OBJ_BLOB) {
7eda0e4f 286 if (stream_blob_to_fd(fileno(f), &obj->oid, NULL, 1))
eb726f2d 287 die_errno("Could not write '%s'", filename);
16a7fcfe 288 } else
993a21b0 289 fprintf(f, "%s\n", describe_object(obj));
47d32af2 290 if (fclose(f))
d824cbba
TR
291 die_errno("Could not finish '%s'",
292 filename);
fcd12db6 293 free(filename);
68f6c019 294 }
18af29f2
LT
295 return;
296 }
297
298 /*
299 * Otherwise? It's there, it's unreachable, and some other unreachable
300 * object points to it. Ignore it - it's not interesting, and we showed
301 * all the interesting cases above.
302 */
303}
304
305static void check_object(struct object *obj)
306{
20f1eb6b 307 if (verbose)
993a21b0 308 fprintf(stderr, "Checking %s\n", describe_object(obj));
20f1eb6b 309
18af29f2
LT
310 if (obj->flags & REACHABLE)
311 check_reachable_object(obj);
312 else
313 check_unreachable_object(obj);
314}
f1f0d088 315
8ba0bbb2
LT
316static void check_connectivity(void)
317{
fc046a75 318 int i, max;
8ba0bbb2 319
04d39759
LT
320 /* Traverse the pending reachable objects */
321 traverse_reachable();
322
8ba0bbb2 323 /* Look up all the requirements, warn about missing objects.. */
fc046a75 324 max = get_max_object_index();
20f1eb6b
JS
325 if (verbose)
326 fprintf(stderr, "Checking connectivity (%d objects)\n", max);
327
fc046a75 328 for (i = 0; i < max; i++) {
fc046a75 329 struct object *obj = get_indexed_object(i);
8ba0bbb2 330
18af29f2
LT
331 if (obj)
332 check_object(obj);
8ba0bbb2
LT
333 }
334}
335
c9486eb0 336static int fsck_obj(struct object *obj)
85003492 337{
83cd6f90
RS
338 int err;
339
ba002f3b 340 if (obj->flags & SEEN)
85003492 341 return 0;
ba002f3b 342 obj->flags |= SEEN;
85003492 343
20f1eb6b 344 if (verbose)
ba002f3b 345 fprintf(stderr, "Checking %s %s\n",
97ca7ca8 346 printable_type(obj), describe_object(obj));
42ea9cb2 347
22410549 348 if (fsck_walk(obj, NULL, &fsck_obj_options))
ba002f3b 349 objerror(obj, "broken links");
83cd6f90
RS
350 err = fsck_object(obj, NULL, 0, &fsck_obj_options);
351 if (err)
352 goto out;
1ea34e36 353
ba002f3b
MK
354 if (obj->type == OBJ_COMMIT) {
355 struct commit *commit = (struct commit *) obj;
de2eb7f6 356
ba002f3b 357 if (!commit->parents && show_root)
993a21b0 358 printf("root %s\n", describe_object(&commit->object));
ba002f3b 359 }
92d4c85d 360
ba002f3b
MK
361 if (obj->type == OBJ_TAG) {
362 struct tag *tag = (struct tag *) obj;
20f1eb6b 363
ba002f3b 364 if (show_tags && tag->tagged) {
97ca7ca8 365 printf("tagged %s %s", printable_type(tag->tagged),
993a21b0
JS
366 describe_object(tag->tagged));
367 printf(" (%s) in %s\n", tag->tag,
368 describe_object(&tag->object));
ba002f3b 369 }
92d4c85d 370 }
889262ea 371
83cd6f90
RS
372out:
373 if (obj->type == OBJ_TREE)
374 free_tree_buffer((struct tree *)obj);
375 if (obj->type == OBJ_COMMIT)
376 free_commit_buffer((struct commit *)obj);
377 return err;
20222118
LT
378}
379
9fd75046 380static int fsck_obj_buffer(const struct object_id *oid, enum object_type type,
c9486eb0
NTND
381 unsigned long size, void *buffer, int *eaten)
382{
ec9d2249
NTND
383 /*
384 * Note, buffer may be NULL if type is OBJ_BLOB. See
385 * verify_packfile(), data_valid variable for details.
386 */
c9486eb0 387 struct object *obj;
c251c83d 388 obj = parse_object_buffer(oid, type, size, buffer, eaten);
c9486eb0
NTND
389 if (!obj) {
390 errors_found |= ERROR_OBJECT;
9fd75046 391 return error("%s: object corrupt or missing", oid_to_hex(oid));
c9486eb0 392 }
092c55d0
JT
393 obj->flags &= ~(REACHABLE | SEEN);
394 obj->flags |= HAS_OBJ;
c9486eb0
NTND
395 return fsck_obj(obj);
396}
397
96f1e58f 398static int default_refs;
944d8589 399
9461d272 400static void fsck_handle_reflog_oid(const char *refname, struct object_id *oid,
dddbad72 401 timestamp_t timestamp)
55dd5526
JH
402{
403 struct object *obj;
404
9461d272 405 if (!is_null_oid(oid)) {
406 obj = lookup_object(oid->hash);
c2d17b3b 407 if (obj && (obj->flags & HAS_OBJ)) {
90cf590f
JS
408 if (timestamp && name_objects)
409 add_decoration(fsck_walk_options.object_names,
410 obj,
cb71f8bd 411 xstrfmt("%s@{%"PRItime"}", refname, timestamp));
092c55d0 412 obj->flags |= USED;
271b8d25 413 mark_object_reachable(obj);
498f1f61 414 } else if (!is_promisor_object(oid)) {
9461d272 415 error("%s: invalid reflog entry %s", refname, oid_to_hex(oid));
19bf6c9b 416 errors_found |= ERROR_REACHABLE;
55dd5526
JH
417 }
418 }
d66ae59b
MH
419}
420
9461d272 421static int fsck_handle_reflog_ent(struct object_id *ooid, struct object_id *noid,
dddbad72 422 const char *email, timestamp_t timestamp, int tz,
883d60fa 423 const char *message, void *cb_data)
55dd5526 424{
19bf6c9b 425 const char *refname = cb_data;
55dd5526 426
20f1eb6b
JS
427 if (verbose)
428 fprintf(stderr, "Checking reflog %s->%s\n",
9461d272 429 oid_to_hex(ooid), oid_to_hex(noid));
20f1eb6b 430
9461d272 431 fsck_handle_reflog_oid(refname, ooid, 0);
432 fsck_handle_reflog_oid(refname, noid, timestamp);
55dd5526
JH
433 return 0;
434}
435
635b99a0
MH
436static int fsck_handle_reflog(const char *logname, const struct object_id *oid,
437 int flag, void *cb_data)
eb8381c8 438{
19bf6c9b 439 for_each_reflog_ent(logname, fsck_handle_reflog_ent, (void *)logname);
eb8381c8
NP
440 return 0;
441}
442
635b99a0
MH
443static int fsck_handle_ref(const char *refname, const struct object_id *oid,
444 int flag, void *cb_data)
1024932f 445{
1024932f
LT
446 struct object *obj;
447
c251c83d 448 obj = parse_object(oid);
8a498a05 449 if (!obj) {
43f25158
JT
450 if (is_promisor_object(oid)) {
451 /*
452 * Increment default_refs anyway, because this is a
453 * valid ref.
454 */
455 default_refs++;
456 return 0;
457 }
635b99a0 458 error("%s: invalid sha1 pointer %s", refname, oid_to_hex(oid));
30d1038d 459 errors_found |= ERROR_REACHABLE;
944d8589
LT
460 /* We'll continue with the rest despite the error.. */
461 return 0;
8a498a05 462 }
122f76f5 463 if (obj->type != OBJ_COMMIT && is_branch(refname)) {
6232f62b 464 error("%s: not a commit", refname);
122f76f5
JH
465 errors_found |= ERROR_REFS;
466 }
944d8589 467 default_refs++;
092c55d0 468 obj->flags |= USED;
90cf590f
JS
469 if (name_objects)
470 add_decoration(fsck_walk_options.object_names,
471 obj, xstrdup(refname));
271b8d25 472 mark_object_reachable(obj);
55dd5526 473
7c4d07c7 474 return 0;
1024932f
LT
475}
476
1024932f
LT
477static void get_default_heads(void)
478{
635b99a0
MH
479 if (head_points_at && !is_null_oid(&head_oid))
480 fsck_handle_ref("HEAD", &head_oid, 0, NULL);
481 for_each_rawref(fsck_handle_ref, NULL);
566842f6 482 if (include_reflogs)
635b99a0 483 for_each_reflog(fsck_handle_reflog, NULL);
071fa89e
LT
484
485 /*
486 * Not having any default heads isn't really fatal, but
487 * it does mean that "--unreachable" no longer makes any
488 * sense (since in this case everything will obviously
489 * be unreachable by definition.
490 *
491 * Showing dangling objects is valid, though (as those
492 * dangling objects are likely lost heads).
493 *
494 * So we just print a warning about it, and clear the
495 * "show_unreachable" flag.
496 */
497 if (!default_refs) {
8eb2d0be 498 fprintf(stderr, "notice: No default references\n");
071fa89e
LT
499 show_unreachable = 0;
500 }
1024932f
LT
501}
502
76c1d9a0 503static struct object *parse_loose_object(const struct object_id *oid,
c68b489e
JK
504 const char *path)
505{
506 struct object *obj;
507 void *contents;
508 enum object_type type;
509 unsigned long size;
510 int eaten;
511
76c1d9a0 512 if (read_loose_object(path, oid->hash, &type, &size, &contents) < 0)
c68b489e
JK
513 return NULL;
514
515 if (!contents && type != OBJ_BLOB)
516 die("BUG: read_loose_object streamed a non-blob");
517
c251c83d 518 obj = parse_object_buffer(oid, type, size, contents, &eaten);
c68b489e
JK
519
520 if (!eaten)
521 free(contents);
522 return obj;
523}
524
76c1d9a0 525static int fsck_loose(const struct object_id *oid, const char *path, void *data)
f0766bf9 526{
76c1d9a0 527 struct object *obj = parse_loose_object(oid, path);
c68b489e
JK
528
529 if (!obj) {
530 errors_found |= ERROR_OBJECT;
531 error("%s: object corrupt or missing: %s",
76c1d9a0 532 oid_to_hex(oid), path);
c68b489e
JK
533 return 0; /* keep checking other objects */
534 }
535
092c55d0
JT
536 obj->flags &= ~(REACHABLE | SEEN);
537 obj->flags |= HAS_OBJ;
c68b489e 538 if (fsck_obj(obj))
f0766bf9
JK
539 errors_found |= ERROR_OBJECT;
540 return 0;
541}
542
543static int fsck_cruft(const char *basename, const char *path, void *data)
544{
545 if (!starts_with(basename, "tmp_obj_"))
546 fprintf(stderr, "bad sha1 file: %s\n", path);
547 return 0;
548}
549
70c49050 550static int fsck_subdir(unsigned int nr, const char *path, void *progress)
f0766bf9
JK
551{
552 display_progress(progress, nr + 1);
553 return 0;
554}
555
8a498a05
JH
556static void fsck_object_dir(const char *path)
557{
1e49f22f 558 struct progress *progress = NULL;
20f1eb6b
JS
559
560 if (verbose)
561 fprintf(stderr, "Checking object directory\n");
562
1e49f22f 563 if (show_progress)
754dbc43 564 progress = start_progress(_("Checking object directories"), 256);
f0766bf9
JK
565
566 for_each_loose_file_in_objdir(path, fsck_loose, fsck_cruft, fsck_subdir,
567 progress);
568 display_progress(progress, 256);
1e49f22f 569 stop_progress(&progress);
8a498a05
JH
570}
571
c3330383
LT
572static int fsck_head_link(void)
573{
8eb2d0be 574 int null_is_error = 0;
8eb2d0be 575
20f1eb6b
JS
576 if (verbose)
577 fprintf(stderr, "Checking HEAD link\n");
578
49e61479 579 head_points_at = resolve_ref_unsafe("HEAD", 0, &head_oid, NULL);
122f76f5
JH
580 if (!head_points_at) {
581 errors_found |= ERROR_REFS;
8eb2d0be 582 return error("Invalid HEAD");
122f76f5 583 }
8eb2d0be
JH
584 if (!strcmp(head_points_at, "HEAD"))
585 /* detached HEAD */
586 null_is_error = 1;
122f76f5
JH
587 else if (!starts_with(head_points_at, "refs/heads/")) {
588 errors_found |= ERROR_REFS;
8098a178 589 return error("HEAD points to something strange (%s)",
5b10b091 590 head_points_at);
122f76f5 591 }
635b99a0 592 if (is_null_oid(&head_oid)) {
122f76f5
JH
593 if (null_is_error) {
594 errors_found |= ERROR_REFS;
8eb2d0be 595 return error("HEAD: detached HEAD points at nothing");
122f76f5 596 }
8eb2d0be
JH
597 fprintf(stderr, "notice: HEAD points to an unborn branch (%s)\n",
598 head_points_at + 11);
599 }
c3330383
LT
600 return 0;
601}
602
53dc3f3e
JH
603static int fsck_cache_tree(struct cache_tree *it)
604{
605 int i;
606 int err = 0;
607
20f1eb6b
JS
608 if (verbose)
609 fprintf(stderr, "Checking cache tree\n");
610
53dc3f3e 611 if (0 <= it->entry_count) {
c251c83d 612 struct object *obj = parse_object(&it->oid);
6d60bbef
JH
613 if (!obj) {
614 error("%s: invalid sha1 pointer in cache-tree",
e0a92804 615 oid_to_hex(&it->oid));
122f76f5 616 errors_found |= ERROR_REFS;
6d60bbef
JH
617 return 1;
618 }
092c55d0 619 obj->flags |= USED;
90cf590f
JS
620 if (name_objects)
621 add_decoration(fsck_walk_options.object_names,
622 obj, xstrdup(":"));
a1cdc251 623 mark_object_reachable(obj);
1974632c 624 if (obj->type != OBJ_TREE)
53dc3f3e
JH
625 err |= objerror(obj, "non-tree in cache-tree");
626 }
627 for (i = 0; i < it->subtree_nr; i++)
628 err |= fsck_cache_tree(it->down[i]->cache_tree);
629 return err;
630}
631
76c1d9a0 632static void mark_object_for_connectivity(const struct object_id *oid)
3e3f8bd6 633{
76c1d9a0 634 struct object *obj = lookup_unknown_object(oid->hash);
3e3f8bd6
JK
635 obj->flags |= HAS_OBJ;
636}
637
76c1d9a0 638static int mark_loose_for_connectivity(const struct object_id *oid,
3e3f8bd6
JK
639 const char *path,
640 void *data)
641{
76c1d9a0 642 mark_object_for_connectivity(oid);
3e3f8bd6
JK
643 return 0;
644}
645
76c1d9a0 646static int mark_packed_for_connectivity(const struct object_id *oid,
3e3f8bd6
JK
647 struct packed_git *pack,
648 uint32_t pos,
649 void *data)
650{
76c1d9a0 651 mark_object_for_connectivity(oid);
3e3f8bd6
JK
652 return 0;
653}
654
5ac0a206 655static char const * const fsck_usage[] = {
9c9b4f2f 656 N_("git fsck [<options>] [<object>...]"),
5ac0a206
PH
657 NULL
658};
659
660static struct option fsck_opts[] = {
cf8fe315 661 OPT__VERBOSE(&verbose, N_("be verbose")),
d5d09d47 662 OPT_BOOL(0, "unreachable", &show_unreachable, N_("show unreachable objects")),
cf8fe315 663 OPT_BOOL(0, "dangling", &show_dangling, N_("show dangling objects")),
d5d09d47
SB
664 OPT_BOOL(0, "tags", &show_tags, N_("report tags")),
665 OPT_BOOL(0, "root", &show_root, N_("report root nodes")),
666 OPT_BOOL(0, "cache", &keep_cache_objects, N_("make index objects head nodes")),
667 OPT_BOOL(0, "reflogs", &include_reflogs, N_("make reflogs head nodes (default)")),
668 OPT_BOOL(0, "full", &check_full, N_("also consider packs and alternate objects")),
02976bf8 669 OPT_BOOL(0, "connectivity-only", &connectivity_only, N_("check only connectivity")),
d5d09d47
SB
670 OPT_BOOL(0, "strict", &check_strict, N_("enable more strict checking")),
671 OPT_BOOL(0, "lost-found", &write_lost_and_found,
cf8fe315
NTND
672 N_("write dangling objects in .git/lost-found")),
673 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
90cf590f 674 OPT_BOOL(0, "name-objects", &name_objects, N_("show verbose names for reachable objects")),
5ac0a206
PH
675 OPT_END(),
676};
e2b4f635 677
baffc0e7 678int cmd_fsck(int argc, const char **argv, const char *prefix)
20222118 679{
78e7b98f 680 int i;
e15ef669 681 struct alternate_object_database *alt;
20222118 682
8b4c0103
JT
683 /* fsck knows how to handle missing promisor objects */
684 fetch_if_missing = 0;
685
e2b4f635 686 errors_found = 0;
afc711b8 687 check_replace_refs = 0;
61e2b015 688
37782920 689 argc = parse_options(argc, argv, prefix, fsck_opts, fsck_usage, 0);
1e49f22f 690
22410549
JS
691 fsck_walk_options.walk = mark_object;
692 fsck_obj_options.walk = mark_used;
693 fsck_obj_options.error_func = fsck_error_func;
694 if (check_strict)
695 fsck_obj_options.strict = 1;
696
1e49f22f
NTND
697 if (show_progress == -1)
698 show_progress = isatty(2);
699 if (verbose)
700 show_progress = 0;
701
5ac0a206
PH
702 if (write_lost_and_found) {
703 check_full = 1;
704 include_reflogs = 0;
889262ea
LT
705 }
706
90cf590f
JS
707 if (name_objects)
708 fsck_walk_options.object_names =
709 xcalloc(1, sizeof(struct decoration));
710
2becf00f
JS
711 git_config(fsck_config, NULL);
712
c3330383 713 fsck_head_link();
3e3f8bd6
JK
714 if (connectivity_only) {
715 for_each_loose_object(mark_loose_for_connectivity, NULL, 0);
716 for_each_packed_object(mark_packed_for_connectivity, NULL, 0);
717 } else {
031dc927
SB
718 struct alternate_object_database *alt_odb_list;
719
02976bf8 720 fsck_object_dir(get_object_directory());
e15ef669 721
fbe85e73 722 prepare_alt_odb();
031dc927 723 alt_odb_list = the_repository->objects->alt_odb_list;
597f9134
JK
724 for (alt = alt_odb_list; alt; alt = alt->next)
725 fsck_object_dir(alt->path);
e15ef669 726
3e3f8bd6
JK
727 if (check_full) {
728 struct packed_git *p;
729 uint32_t total = 0, count = 0;
730 struct progress *progress = NULL;
e15ef669 731
3e3f8bd6 732 prepare_packed_git();
1e49f22f 733
3e3f8bd6 734 if (show_progress) {
a80d72db
SB
735 for (p = get_packed_git(the_repository); p;
736 p = p->next) {
3e3f8bd6
JK
737 if (open_pack_index(p))
738 continue;
739 total += p->num_objects;
740 }
1e49f22f 741
3e3f8bd6
JK
742 progress = start_progress(_("Checking objects"), total);
743 }
a80d72db
SB
744 for (p = get_packed_git(the_repository); p;
745 p = p->next) {
3e3f8bd6
JK
746 /* verify gives error messages itself */
747 if (verify_pack(p, fsck_obj_buffer,
748 progress, count))
749 errors_found |= ERROR_PACK;
750 count += p->num_objects;
1e49f22f 751 }
3e3f8bd6 752 stop_progress(&progress);
1e49f22f 753 }
bcee6fd8
LT
754 }
755
3aed2fda 756 for (i = 0; i < argc; i++) {
a6080a0a 757 const char *arg = argv[i];
aca6065c 758 struct object_id oid;
759 if (!get_oid(arg, &oid)) {
760 struct object *obj = lookup_object(oid.hash);
e1a1388d 761
c2d17b3b 762 if (!obj || !(obj->flags & HAS_OBJ)) {
096c9b8b
JT
763 if (is_promisor_object(&oid))
764 continue;
aca6065c 765 error("%s: object missing", oid_to_hex(&oid));
c6c7b16d 766 errors_found |= ERROR_OBJECT;
e1a1388d 767 continue;
c6c7b16d 768 }
e1a1388d 769
092c55d0 770 obj->flags |= USED;
90cf590f
JS
771 if (name_objects)
772 add_decoration(fsck_walk_options.object_names,
773 obj, xstrdup(arg));
271b8d25 774 mark_object_reachable(obj);
d9839e03
LT
775 continue;
776 }
f1f0d088 777 error("invalid parameter: expected sha1, got '%s'", arg);
c6c7b16d 778 errors_found |= ERROR_OBJECT;
d9839e03 779 }
d9839e03 780
1024932f 781 /*
d1af002d 782 * If we've not been given any explicit head information, do the
e7bd907d
LT
783 * default ones from .git/refs. We also consider the index file
784 * in this case (ie this implies --cache).
1024932f 785 */
c3271a0e 786 if (!argc) {
1024932f
LT
787 get_default_heads();
788 keep_cache_objects = 1;
789 }
790
ae7c0c92 791 if (keep_cache_objects) {
a33fc72f 792 verify_index_checksum = 1;
00ec50e5 793 verify_ce_order = 1;
ae7c0c92
JH
794 read_cache();
795 for (i = 0; i < active_nr; i++) {
8d9721c8
LT
796 unsigned int mode;
797 struct blob *blob;
ae7c0c92 798 struct object *obj;
8d9721c8 799
7a51ed66 800 mode = active_cache[i]->ce_mode;
302b9282 801 if (S_ISGITLINK(mode))
8d9721c8 802 continue;
3aca1fc6 803 blob = lookup_blob(&active_cache[i]->oid);
ae7c0c92
JH
804 if (!blob)
805 continue;
806 obj = &blob->object;
092c55d0 807 obj->flags |= USED;
90cf590f
JS
808 if (name_objects)
809 add_decoration(fsck_walk_options.object_names,
810 obj,
811 xstrfmt(":%s", active_cache[i]->name));
271b8d25 812 mark_object_reachable(obj);
ae7c0c92 813 }
53dc3f3e
JH
814 if (active_cache_tree)
815 fsck_cache_tree(active_cache_tree);
ae7c0c92
JH
816 }
817
8ba0bbb2 818 check_connectivity();
e2b4f635 819 return errors_found;
20222118 820}