9 #include "cache-tree.h"
10 #include "tree-walk.h"
12 #include "parse-options.h"
15 #include "streaming.h"
17 #define REACHABLE 0x0001
19 #define HAS_OBJ 0x0004
23 static int show_unreachable
;
24 static int include_reflogs
= 1;
25 static int check_full
= 1;
26 static int connectivity_only
;
27 static int check_strict
;
28 static int keep_cache_objects
;
29 static struct fsck_options fsck_walk_options
= FSCK_OPTIONS_DEFAULT
;
30 static struct fsck_options fsck_obj_options
= FSCK_OPTIONS_DEFAULT
;
31 static struct object_id head_oid
;
32 static const char *head_points_at
;
33 static int errors_found
;
34 static int write_lost_and_found
;
36 static int show_progress
= -1;
37 static int show_dangling
= 1;
38 #define ERROR_OBJECT 01
39 #define ERROR_REACHABLE 02
42 static int fsck_config(const char *var
, const char *value
, void *cb
)
44 if (strcmp(var
, "fsck.skiplist") == 0) {
46 struct strbuf sb
= STRBUF_INIT
;
48 if (git_config_pathname(&path
, var
, value
))
50 strbuf_addf(&sb
, "skiplist=%s", path
);
52 fsck_set_msg_types(&fsck_obj_options
, sb
.buf
);
57 if (skip_prefix(var
, "fsck.", &var
)) {
58 fsck_set_msg_type(&fsck_obj_options
, var
, value
);
62 return git_default_config(var
, value
, cb
);
65 static void objreport(struct object
*obj
, const char *msg_type
,
68 fprintf(stderr
, "%s in %s %s: %s\n",
69 msg_type
, typename(obj
->type
), sha1_to_hex(obj
->sha1
), err
);
72 static int objerror(struct object
*obj
, const char *err
)
74 errors_found
|= ERROR_OBJECT
;
75 objreport(obj
, "error", err
);
79 static int fsck_error_func(struct object
*obj
, int type
, const char *message
)
81 objreport(obj
, (type
== FSCK_WARN
) ? "warning" : "error", message
);
82 return (type
== FSCK_WARN
) ? 0 : 1;
85 static struct object_array pending
;
87 static int mark_object(struct object
*obj
, int type
, void *data
, struct fsck_options
*options
)
89 struct object
*parent
= data
;
92 * The only case data is NULL or type is OBJ_ANY is when
93 * mark_object_reachable() calls us. All the callers of
94 * that function has non-NULL obj hence ...
97 /* ... these references to parent->fld are safe here */
98 printf("broken link from %7s %s\n",
99 typename(parent
->type
), sha1_to_hex(parent
->sha1
));
100 printf("broken link from %7s %s\n",
101 (type
== OBJ_ANY
? "unknown" : typename(type
)), "unknown");
102 errors_found
|= ERROR_REACHABLE
;
106 if (type
!= OBJ_ANY
&& obj
->type
!= type
)
107 /* ... and the reference to parent is safe here */
108 objerror(parent
, "wrong object type in link");
110 if (obj
->flags
& REACHABLE
)
112 obj
->flags
|= REACHABLE
;
113 if (!(obj
->flags
& HAS_OBJ
)) {
114 if (parent
&& !has_sha1_file(obj
->sha1
)) {
115 printf("broken link from %7s %s\n",
116 typename(parent
->type
), sha1_to_hex(parent
->sha1
));
117 printf(" to %7s %s\n",
118 typename(obj
->type
), sha1_to_hex(obj
->sha1
));
119 errors_found
|= ERROR_REACHABLE
;
124 add_object_array(obj
, NULL
, &pending
);
128 static void mark_object_reachable(struct object
*obj
)
130 mark_object(obj
, OBJ_ANY
, NULL
, NULL
);
133 static int traverse_one_object(struct object
*obj
)
136 struct tree
*tree
= NULL
;
138 if (obj
->type
== OBJ_TREE
) {
139 tree
= (struct tree
*)obj
;
140 if (parse_tree(tree
) < 0)
141 return 1; /* error already displayed */
143 result
= fsck_walk(obj
, obj
, &fsck_walk_options
);
145 free_tree_buffer(tree
);
149 static int traverse_reachable(void)
151 struct progress
*progress
= NULL
;
155 progress
= start_progress_delay(_("Checking connectivity"), 0, 0, 2);
157 struct object_array_entry
*entry
;
160 entry
= pending
.objects
+ --pending
.nr
;
162 result
|= traverse_one_object(obj
);
163 display_progress(progress
, ++nr
);
165 stop_progress(&progress
);
169 static int mark_used(struct object
*obj
, int type
, void *data
, struct fsck_options
*options
)
178 * Check a single reachable object
180 static void check_reachable_object(struct object
*obj
)
183 * We obviously want the object to be parsed,
184 * except if it was in a pack-file and we didn't
187 if (!(obj
->flags
& HAS_OBJ
)) {
188 if (has_sha1_pack(obj
->sha1
))
189 return; /* it is in pack - forget about it */
190 if (connectivity_only
&& has_sha1_file(obj
->sha1
))
192 printf("missing %s %s\n", typename(obj
->type
), sha1_to_hex(obj
->sha1
));
193 errors_found
|= ERROR_REACHABLE
;
199 * Check a single unreachable object
201 static void check_unreachable_object(struct object
*obj
)
204 * Missing unreachable object? Ignore it. It's not like
205 * we miss it (since it can't be reached), nor do we want
206 * to complain about it being unreachable (since it does
213 * Unreachable object that exists? Show it if asked to,
214 * since this is something that is prunable.
216 if (show_unreachable
) {
217 printf("unreachable %s %s\n", typename(obj
->type
), sha1_to_hex(obj
->sha1
));
222 * "!used" means that nothing at all points to it, including
223 * other unreachable objects. In other words, it's the "tip"
224 * of some set of unreachable objects, usually a commit that
227 * Such starting points are more interesting than some random
228 * set of unreachable objects, so we show them even if the user
229 * hasn't asked for _all_ unreachable objects. If you have
230 * deleted a branch by mistake, this is a prime candidate to
231 * start looking at, for example.
235 printf("dangling %s %s\n", typename(obj
->type
),
236 sha1_to_hex(obj
->sha1
));
237 if (write_lost_and_found
) {
238 char *filename
= git_pathdup("lost-found/%s/%s",
239 obj
->type
== OBJ_COMMIT
? "commit" : "other",
240 sha1_to_hex(obj
->sha1
));
243 if (safe_create_leading_directories_const(filename
)) {
244 error("Could not create lost-found");
248 if (!(f
= fopen(filename
, "w")))
249 die_errno("Could not open '%s'", filename
);
250 if (obj
->type
== OBJ_BLOB
) {
251 if (stream_blob_to_fd(fileno(f
), obj
->sha1
, NULL
, 1))
252 die_errno("Could not write '%s'", filename
);
254 fprintf(f
, "%s\n", sha1_to_hex(obj
->sha1
));
256 die_errno("Could not finish '%s'",
264 * Otherwise? It's there, it's unreachable, and some other unreachable
265 * object points to it. Ignore it - it's not interesting, and we showed
266 * all the interesting cases above.
270 static void check_object(struct object
*obj
)
273 fprintf(stderr
, "Checking %s\n", sha1_to_hex(obj
->sha1
));
275 if (obj
->flags
& REACHABLE
)
276 check_reachable_object(obj
);
278 check_unreachable_object(obj
);
281 static void check_connectivity(void)
285 /* Traverse the pending reachable objects */
286 traverse_reachable();
288 /* Look up all the requirements, warn about missing objects.. */
289 max
= get_max_object_index();
291 fprintf(stderr
, "Checking connectivity (%d objects)\n", max
);
293 for (i
= 0; i
< max
; i
++) {
294 struct object
*obj
= get_indexed_object(i
);
301 static int fsck_obj(struct object
*obj
)
303 if (obj
->flags
& SEEN
)
308 fprintf(stderr
, "Checking %s %s\n",
309 typename(obj
->type
), sha1_to_hex(obj
->sha1
));
311 if (fsck_walk(obj
, NULL
, &fsck_obj_options
))
312 objerror(obj
, "broken links");
313 if (fsck_object(obj
, NULL
, 0, &fsck_obj_options
))
316 if (obj
->type
== OBJ_TREE
) {
317 struct tree
*item
= (struct tree
*) obj
;
319 free_tree_buffer(item
);
322 if (obj
->type
== OBJ_COMMIT
) {
323 struct commit
*commit
= (struct commit
*) obj
;
325 free_commit_buffer(commit
);
327 if (!commit
->parents
&& show_root
)
328 printf("root %s\n", sha1_to_hex(commit
->object
.sha1
));
331 if (obj
->type
== OBJ_TAG
) {
332 struct tag
*tag
= (struct tag
*) obj
;
334 if (show_tags
&& tag
->tagged
) {
335 printf("tagged %s %s", typename(tag
->tagged
->type
), sha1_to_hex(tag
->tagged
->sha1
));
336 printf(" (%s) in %s\n", tag
->tag
, sha1_to_hex(tag
->object
.sha1
));
343 static int fsck_sha1(const unsigned char *sha1
)
345 struct object
*obj
= parse_object(sha1
);
347 errors_found
|= ERROR_OBJECT
;
348 return error("%s: object corrupt or missing",
351 obj
->flags
|= HAS_OBJ
;
352 return fsck_obj(obj
);
355 static int fsck_obj_buffer(const unsigned char *sha1
, enum object_type type
,
356 unsigned long size
, void *buffer
, int *eaten
)
359 obj
= parse_object_buffer(sha1
, type
, size
, buffer
, eaten
);
361 errors_found
|= ERROR_OBJECT
;
362 return error("%s: object corrupt or missing", sha1_to_hex(sha1
));
364 obj
->flags
= HAS_OBJ
;
365 return fsck_obj(obj
);
368 static int default_refs
;
370 static void fsck_handle_reflog_sha1(const char *refname
, unsigned char *sha1
)
374 if (!is_null_sha1(sha1
)) {
375 obj
= lookup_object(sha1
);
378 mark_object_reachable(obj
);
380 error("%s: invalid reflog entry %s", refname
, sha1_to_hex(sha1
));
381 errors_found
|= ERROR_REACHABLE
;
386 static int fsck_handle_reflog_ent(unsigned char *osha1
, unsigned char *nsha1
,
387 const char *email
, unsigned long timestamp
, int tz
,
388 const char *message
, void *cb_data
)
390 const char *refname
= cb_data
;
393 fprintf(stderr
, "Checking reflog %s->%s\n",
394 sha1_to_hex(osha1
), sha1_to_hex(nsha1
));
396 fsck_handle_reflog_sha1(refname
, osha1
);
397 fsck_handle_reflog_sha1(refname
, nsha1
);
401 static int fsck_handle_reflog(const char *logname
, const struct object_id
*oid
,
402 int flag
, void *cb_data
)
404 for_each_reflog_ent(logname
, fsck_handle_reflog_ent
, (void *)logname
);
408 static int fsck_handle_ref(const char *refname
, const struct object_id
*oid
,
409 int flag
, void *cb_data
)
413 obj
= parse_object(oid
->hash
);
415 error("%s: invalid sha1 pointer %s", refname
, oid_to_hex(oid
));
416 errors_found
|= ERROR_REACHABLE
;
417 /* We'll continue with the rest despite the error.. */
420 if (obj
->type
!= OBJ_COMMIT
&& is_branch(refname
))
421 error("%s: not a commit", refname
);
424 mark_object_reachable(obj
);
429 static void get_default_heads(void)
431 if (head_points_at
&& !is_null_oid(&head_oid
))
432 fsck_handle_ref("HEAD", &head_oid
, 0, NULL
);
433 for_each_rawref(fsck_handle_ref
, NULL
);
435 for_each_reflog(fsck_handle_reflog
, NULL
);
438 * Not having any default heads isn't really fatal, but
439 * it does mean that "--unreachable" no longer makes any
440 * sense (since in this case everything will obviously
441 * be unreachable by definition.
443 * Showing dangling objects is valid, though (as those
444 * dangling objects are likely lost heads).
446 * So we just print a warning about it, and clear the
447 * "show_unreachable" flag.
450 fprintf(stderr
, "notice: No default references\n");
451 show_unreachable
= 0;
455 static int fsck_loose(const unsigned char *sha1
, const char *path
, void *data
)
458 errors_found
|= ERROR_OBJECT
;
462 static int fsck_cruft(const char *basename
, const char *path
, void *data
)
464 if (!starts_with(basename
, "tmp_obj_"))
465 fprintf(stderr
, "bad sha1 file: %s\n", path
);
469 static int fsck_subdir(int nr
, const char *path
, void *progress
)
471 display_progress(progress
, nr
+ 1);
475 static void fsck_object_dir(const char *path
)
477 struct progress
*progress
= NULL
;
480 fprintf(stderr
, "Checking object directory\n");
483 progress
= start_progress(_("Checking object directories"), 256);
485 for_each_loose_file_in_objdir(path
, fsck_loose
, fsck_cruft
, fsck_subdir
,
487 display_progress(progress
, 256);
488 stop_progress(&progress
);
491 static int fsck_head_link(void)
494 int null_is_error
= 0;
497 fprintf(stderr
, "Checking HEAD link\n");
499 head_points_at
= resolve_ref_unsafe("HEAD", 0, head_oid
.hash
, &flag
);
501 return error("Invalid HEAD");
502 if (!strcmp(head_points_at
, "HEAD"))
505 else if (!starts_with(head_points_at
, "refs/heads/"))
506 return error("HEAD points to something strange (%s)",
508 if (is_null_oid(&head_oid
)) {
510 return error("HEAD: detached HEAD points at nothing");
511 fprintf(stderr
, "notice: HEAD points to an unborn branch (%s)\n",
512 head_points_at
+ 11);
517 static int fsck_cache_tree(struct cache_tree
*it
)
523 fprintf(stderr
, "Checking cache tree\n");
525 if (0 <= it
->entry_count
) {
526 struct object
*obj
= parse_object(it
->sha1
);
528 error("%s: invalid sha1 pointer in cache-tree",
529 sha1_to_hex(it
->sha1
));
533 mark_object_reachable(obj
);
534 if (obj
->type
!= OBJ_TREE
)
535 err
|= objerror(obj
, "non-tree in cache-tree");
537 for (i
= 0; i
< it
->subtree_nr
; i
++)
538 err
|= fsck_cache_tree(it
->down
[i
]->cache_tree
);
542 static char const * const fsck_usage
[] = {
543 N_("git fsck [<options>] [<object>...]"),
547 static struct option fsck_opts
[] = {
548 OPT__VERBOSE(&verbose
, N_("be verbose")),
549 OPT_BOOL(0, "unreachable", &show_unreachable
, N_("show unreachable objects")),
550 OPT_BOOL(0, "dangling", &show_dangling
, N_("show dangling objects")),
551 OPT_BOOL(0, "tags", &show_tags
, N_("report tags")),
552 OPT_BOOL(0, "root", &show_root
, N_("report root nodes")),
553 OPT_BOOL(0, "cache", &keep_cache_objects
, N_("make index objects head nodes")),
554 OPT_BOOL(0, "reflogs", &include_reflogs
, N_("make reflogs head nodes (default)")),
555 OPT_BOOL(0, "full", &check_full
, N_("also consider packs and alternate objects")),
556 OPT_BOOL(0, "connectivity-only", &connectivity_only
, N_("check only connectivity")),
557 OPT_BOOL(0, "strict", &check_strict
, N_("enable more strict checking")),
558 OPT_BOOL(0, "lost-found", &write_lost_and_found
,
559 N_("write dangling objects in .git/lost-found")),
560 OPT_BOOL(0, "progress", &show_progress
, N_("show progress")),
564 int cmd_fsck(int argc
, const char **argv
, const char *prefix
)
567 struct alternate_object_database
*alt
;
570 check_replace_refs
= 0;
572 argc
= parse_options(argc
, argv
, prefix
, fsck_opts
, fsck_usage
, 0);
574 fsck_walk_options
.walk
= mark_object
;
575 fsck_obj_options
.walk
= mark_used
;
576 fsck_obj_options
.error_func
= fsck_error_func
;
578 fsck_obj_options
.strict
= 1;
580 if (show_progress
== -1)
581 show_progress
= isatty(2);
585 if (write_lost_and_found
) {
590 git_config(fsck_config
, NULL
);
593 if (!connectivity_only
) {
594 fsck_object_dir(get_object_directory());
597 for (alt
= alt_odb_list
; alt
; alt
= alt
->next
) {
598 /* directory name, minus trailing slash */
599 size_t namelen
= alt
->name
- alt
->base
- 1;
600 struct strbuf name
= STRBUF_INIT
;
601 strbuf_add(&name
, alt
->base
, namelen
);
602 fsck_object_dir(name
.buf
);
603 strbuf_release(&name
);
608 struct packed_git
*p
;
609 uint32_t total
= 0, count
= 0;
610 struct progress
*progress
= NULL
;
612 prepare_packed_git();
615 for (p
= packed_git
; p
; p
= p
->next
) {
616 if (open_pack_index(p
))
618 total
+= p
->num_objects
;
621 progress
= start_progress(_("Checking objects"), total
);
623 for (p
= packed_git
; p
; p
= p
->next
) {
624 /* verify gives error messages itself */
625 if (verify_pack(p
, fsck_obj_buffer
,
627 errors_found
|= ERROR_PACK
;
628 count
+= p
->num_objects
;
630 stop_progress(&progress
);
634 for (i
= 0; i
< argc
; i
++) {
635 const char *arg
= argv
[i
];
636 unsigned char sha1
[20];
637 if (!get_sha1(arg
, sha1
)) {
638 struct object
*obj
= lookup_object(sha1
);
640 /* Error is printed by lookup_object(). */
645 mark_object_reachable(obj
);
649 error("invalid parameter: expected sha1, got '%s'", arg
);
653 * If we've not been given any explicit head information, do the
654 * default ones from .git/refs. We also consider the index file
655 * in this case (ie this implies --cache).
659 keep_cache_objects
= 1;
662 if (keep_cache_objects
) {
664 for (i
= 0; i
< active_nr
; i
++) {
669 mode
= active_cache
[i
]->ce_mode
;
670 if (S_ISGITLINK(mode
))
672 blob
= lookup_blob(active_cache
[i
]->sha1
);
677 mark_object_reachable(obj
);
679 if (active_cache_tree
)
680 fsck_cache_tree(active_cache_tree
);
683 check_connectivity();