9 #include "cache-tree.h"
10 #include "tree-walk.h"
12 #include "parse-options.h"
15 #include "streaming.h"
17 #define REACHABLE 0x0001
22 static int show_unreachable
;
23 static int include_reflogs
= 1;
24 static int check_full
= 1;
25 static int check_strict
;
26 static int keep_cache_objects
;
27 static unsigned char head_sha1
[20];
28 static const char *head_points_at
;
29 static int errors_found
;
30 static int write_lost_and_found
;
32 static int show_progress
= -1;
33 static int show_dangling
= 1;
34 #define ERROR_OBJECT 01
35 #define ERROR_REACHABLE 02
38 #ifdef NO_D_INO_IN_DIRENT
40 #define DIRENT_SORT_HINT(de) 0
43 #define DIRENT_SORT_HINT(de) ((de)->d_ino)
46 static void objreport(struct object
*obj
, const char *severity
,
47 const char *err
, va_list params
)
49 fprintf(stderr
, "%s in %s %s: ",
50 severity
, typename(obj
->type
), sha1_to_hex(obj
->sha1
));
51 vfprintf(stderr
, err
, params
);
55 __attribute__((format (printf
, 2, 3)))
56 static int objerror(struct object
*obj
, const char *err
, ...)
59 va_start(params
, err
);
60 errors_found
|= ERROR_OBJECT
;
61 objreport(obj
, "error", err
, params
);
66 __attribute__((format (printf
, 3, 4)))
67 static int fsck_error_func(struct object
*obj
, int type
, const char *err
, ...)
70 va_start(params
, err
);
71 objreport(obj
, (type
== FSCK_WARN
) ? "warning" : "error", err
, params
);
73 return (type
== FSCK_WARN
) ? 0 : 1;
76 static struct object_array pending
;
78 static int mark_object(struct object
*obj
, int type
, void *data
)
80 struct object
*parent
= data
;
83 * The only case data is NULL or type is OBJ_ANY is when
84 * mark_object_reachable() calls us. All the callers of
85 * that function has non-NULL obj hence ...
88 /* ... these references to parent->fld are safe here */
89 printf("broken link from %7s %s\n",
90 typename(parent
->type
), sha1_to_hex(parent
->sha1
));
91 printf("broken link from %7s %s\n",
92 (type
== OBJ_ANY
? "unknown" : typename(type
)), "unknown");
93 errors_found
|= ERROR_REACHABLE
;
97 if (type
!= OBJ_ANY
&& obj
->type
!= type
)
98 /* ... and the reference to parent is safe here */
99 objerror(parent
, "wrong object type in link");
101 if (obj
->flags
& REACHABLE
)
103 obj
->flags
|= REACHABLE
;
105 if (parent
&& !has_sha1_file(obj
->sha1
)) {
106 printf("broken link from %7s %s\n",
107 typename(parent
->type
), sha1_to_hex(parent
->sha1
));
108 printf(" to %7s %s\n",
109 typename(obj
->type
), sha1_to_hex(obj
->sha1
));
110 errors_found
|= ERROR_REACHABLE
;
115 add_object_array(obj
, (void *) parent
, &pending
);
119 static void mark_object_reachable(struct object
*obj
)
121 mark_object(obj
, OBJ_ANY
, NULL
);
124 static int traverse_one_object(struct object
*obj
)
127 struct tree
*tree
= NULL
;
129 if (obj
->type
== OBJ_TREE
) {
131 tree
= (struct tree
*)obj
;
132 if (parse_tree(tree
) < 0)
133 return 1; /* error already displayed */
135 result
= fsck_walk(obj
, mark_object
, obj
);
143 static int traverse_reachable(void)
145 struct progress
*progress
= NULL
;
149 progress
= start_progress_delay("Checking connectivity", 0, 0, 2);
151 struct object_array_entry
*entry
;
154 entry
= pending
.objects
+ --pending
.nr
;
156 result
|= traverse_one_object(obj
);
157 display_progress(progress
, ++nr
);
159 stop_progress(&progress
);
163 static int mark_used(struct object
*obj
, int type
, void *data
)
172 * Check a single reachable object
174 static void check_reachable_object(struct object
*obj
)
177 * We obviously want the object to be parsed,
178 * except if it was in a pack-file and we didn't
182 if (has_sha1_pack(obj
->sha1
))
183 return; /* it is in pack - forget about it */
184 printf("missing %s %s\n", typename(obj
->type
), sha1_to_hex(obj
->sha1
));
185 errors_found
|= ERROR_REACHABLE
;
191 * Check a single unreachable object
193 static void check_unreachable_object(struct object
*obj
)
196 * Missing unreachable object? Ignore it. It's not like
197 * we miss it (since it can't be reached), nor do we want
198 * to complain about it being unreachable (since it does
205 * Unreachable object that exists? Show it if asked to,
206 * since this is something that is prunable.
208 if (show_unreachable
) {
209 printf("unreachable %s %s\n", typename(obj
->type
), sha1_to_hex(obj
->sha1
));
214 * "!used" means that nothing at all points to it, including
215 * other unreachable objects. In other words, it's the "tip"
216 * of some set of unreachable objects, usually a commit that
219 * Such starting points are more interesting than some random
220 * set of unreachable objects, so we show them even if the user
221 * hasn't asked for _all_ unreachable objects. If you have
222 * deleted a branch by mistake, this is a prime candidate to
223 * start looking at, for example.
227 printf("dangling %s %s\n", typename(obj
->type
),
228 sha1_to_hex(obj
->sha1
));
229 if (write_lost_and_found
) {
230 char *filename
= git_path("lost-found/%s/%s",
231 obj
->type
== OBJ_COMMIT
? "commit" : "other",
232 sha1_to_hex(obj
->sha1
));
235 if (safe_create_leading_directories(filename
)) {
236 error("Could not create lost-found");
239 if (!(f
= fopen(filename
, "w")))
240 die_errno("Could not open '%s'", filename
);
241 if (obj
->type
== OBJ_BLOB
) {
242 if (stream_blob_to_fd(fileno(f
), obj
->sha1
, NULL
, 1))
243 die_errno("Could not write '%s'", filename
);
245 fprintf(f
, "%s\n", sha1_to_hex(obj
->sha1
));
247 die_errno("Could not finish '%s'",
254 * Otherwise? It's there, it's unreachable, and some other unreachable
255 * object points to it. Ignore it - it's not interesting, and we showed
256 * all the interesting cases above.
260 static void check_object(struct object
*obj
)
263 fprintf(stderr
, "Checking %s\n", sha1_to_hex(obj
->sha1
));
265 if (obj
->flags
& REACHABLE
)
266 check_reachable_object(obj
);
268 check_unreachable_object(obj
);
271 static void check_connectivity(void)
275 /* Traverse the pending reachable objects */
276 traverse_reachable();
278 /* Look up all the requirements, warn about missing objects.. */
279 max
= get_max_object_index();
281 fprintf(stderr
, "Checking connectivity (%d objects)\n", max
);
283 for (i
= 0; i
< max
; i
++) {
284 struct object
*obj
= get_indexed_object(i
);
291 static int fsck_obj(struct object
*obj
)
293 if (obj
->flags
& SEEN
)
298 fprintf(stderr
, "Checking %s %s\n",
299 typename(obj
->type
), sha1_to_hex(obj
->sha1
));
301 if (fsck_walk(obj
, mark_used
, NULL
))
302 objerror(obj
, "broken links");
303 if (fsck_object(obj
, check_strict
, fsck_error_func
))
306 if (obj
->type
== OBJ_TREE
) {
307 struct tree
*item
= (struct tree
*) obj
;
313 if (obj
->type
== OBJ_COMMIT
) {
314 struct commit
*commit
= (struct commit
*) obj
;
316 free(commit
->buffer
);
317 commit
->buffer
= NULL
;
319 if (!commit
->parents
&& show_root
)
320 printf("root %s\n", sha1_to_hex(commit
->object
.sha1
));
323 if (obj
->type
== OBJ_TAG
) {
324 struct tag
*tag
= (struct tag
*) obj
;
326 if (show_tags
&& tag
->tagged
) {
327 printf("tagged %s %s", typename(tag
->tagged
->type
), sha1_to_hex(tag
->tagged
->sha1
));
328 printf(" (%s) in %s\n", tag
->tag
, sha1_to_hex(tag
->object
.sha1
));
335 static int fsck_sha1(const unsigned char *sha1
)
337 struct object
*obj
= parse_object(sha1
);
339 errors_found
|= ERROR_OBJECT
;
340 return error("%s: object corrupt or missing",
343 return fsck_obj(obj
);
346 static int fsck_obj_buffer(const unsigned char *sha1
, enum object_type type
,
347 unsigned long size
, void *buffer
, int *eaten
)
350 obj
= parse_object_buffer(sha1
, type
, size
, buffer
, eaten
);
352 errors_found
|= ERROR_OBJECT
;
353 return error("%s: object corrupt or missing", sha1_to_hex(sha1
));
355 return fsck_obj(obj
);
359 * This is the sorting chunk size: make it reasonably
360 * big so that we can sort well..
362 #define MAX_SHA1_ENTRIES (1024)
366 unsigned char sha1
[20];
371 struct sha1_entry
*entry
[MAX_SHA1_ENTRIES
];
374 static int ino_compare(const void *_a
, const void *_b
)
376 const struct sha1_entry
*a
= _a
, *b
= _b
;
377 unsigned long ino1
= a
->ino
, ino2
= b
->ino
;
378 return ino1
< ino2
? -1 : ino1
> ino2
? 1 : 0;
381 static void fsck_sha1_list(void)
383 int i
, nr
= sha1_list
.nr
;
386 qsort(sha1_list
.entry
, nr
,
387 sizeof(struct sha1_entry
*), ino_compare
);
388 for (i
= 0; i
< nr
; i
++) {
389 struct sha1_entry
*entry
= sha1_list
.entry
[i
];
390 unsigned char *sha1
= entry
->sha1
;
392 sha1_list
.entry
[i
] = NULL
;
399 static void add_sha1_list(unsigned char *sha1
, unsigned long ino
)
401 struct sha1_entry
*entry
= xmalloc(sizeof(*entry
));
405 hashcpy(entry
->sha1
, sha1
);
407 if (nr
== MAX_SHA1_ENTRIES
) {
411 sha1_list
.entry
[nr
] = entry
;
415 static inline int is_loose_object_file(struct dirent
*de
,
416 char *name
, unsigned char *sha1
)
418 if (strlen(de
->d_name
) != 38)
420 memcpy(name
+ 2, de
->d_name
, 39);
421 return !get_sha1_hex(name
, sha1
);
424 static void fsck_dir(int i
, char *path
)
426 DIR *dir
= opendir(path
);
434 fprintf(stderr
, "Checking directory %s\n", path
);
436 sprintf(name
, "%02x", i
);
437 while ((de
= readdir(dir
)) != NULL
) {
438 unsigned char sha1
[20];
440 if (is_dot_or_dotdot(de
->d_name
))
442 if (is_loose_object_file(de
, name
, sha1
)) {
443 add_sha1_list(sha1
, DIRENT_SORT_HINT(de
));
446 if (!prefixcmp(de
->d_name
, "tmp_obj_"))
448 fprintf(stderr
, "bad sha1 file: %s/%s\n", path
, de
->d_name
);
453 static int default_refs
;
455 static int fsck_handle_reflog_ent(unsigned char *osha1
, unsigned char *nsha1
,
456 const char *email
, unsigned long timestamp
, int tz
,
457 const char *message
, void *cb_data
)
462 fprintf(stderr
, "Checking reflog %s->%s\n",
463 sha1_to_hex(osha1
), sha1_to_hex(nsha1
));
465 if (!is_null_sha1(osha1
)) {
466 obj
= lookup_object(osha1
);
469 mark_object_reachable(obj
);
472 obj
= lookup_object(nsha1
);
475 mark_object_reachable(obj
);
480 static int fsck_handle_reflog(const char *logname
, const unsigned char *sha1
, int flag
, void *cb_data
)
482 for_each_reflog_ent(logname
, fsck_handle_reflog_ent
, NULL
);
486 static int is_branch(const char *refname
)
488 return !strcmp(refname
, "HEAD") || !prefixcmp(refname
, "refs/heads/");
491 static int fsck_handle_ref(const char *refname
, const unsigned char *sha1
, int flag
, void *cb_data
)
495 obj
= parse_object(sha1
);
497 error("%s: invalid sha1 pointer %s", refname
, sha1_to_hex(sha1
));
498 /* We'll continue with the rest despite the error.. */
501 if (obj
->type
!= OBJ_COMMIT
&& is_branch(refname
))
502 error("%s: not a commit", refname
);
505 mark_object_reachable(obj
);
510 static void get_default_heads(void)
512 if (head_points_at
&& !is_null_sha1(head_sha1
))
513 fsck_handle_ref("HEAD", head_sha1
, 0, NULL
);
514 for_each_ref(fsck_handle_ref
, NULL
);
516 for_each_reflog(fsck_handle_reflog
, NULL
);
519 * Not having any default heads isn't really fatal, but
520 * it does mean that "--unreachable" no longer makes any
521 * sense (since in this case everything will obviously
522 * be unreachable by definition.
524 * Showing dangling objects is valid, though (as those
525 * dangling objects are likely lost heads).
527 * So we just print a warning about it, and clear the
528 * "show_unreachable" flag.
531 fprintf(stderr
, "notice: No default references\n");
532 show_unreachable
= 0;
536 static void fsck_object_dir(const char *path
)
539 struct progress
*progress
= NULL
;
542 fprintf(stderr
, "Checking object directory\n");
545 progress
= start_progress("Checking object directories", 256);
546 for (i
= 0; i
< 256; i
++) {
547 static char dir
[4096];
548 sprintf(dir
, "%s/%02x", path
, i
);
550 display_progress(progress
, i
+1);
552 stop_progress(&progress
);
556 static int fsck_head_link(void)
559 int null_is_error
= 0;
562 fprintf(stderr
, "Checking HEAD link\n");
564 head_points_at
= resolve_ref_unsafe("HEAD", head_sha1
, 0, &flag
);
566 return error("Invalid HEAD");
567 if (!strcmp(head_points_at
, "HEAD"))
570 else if (prefixcmp(head_points_at
, "refs/heads/"))
571 return error("HEAD points to something strange (%s)",
573 if (is_null_sha1(head_sha1
)) {
575 return error("HEAD: detached HEAD points at nothing");
576 fprintf(stderr
, "notice: HEAD points to an unborn branch (%s)\n",
577 head_points_at
+ 11);
582 static int fsck_cache_tree(struct cache_tree
*it
)
588 fprintf(stderr
, "Checking cache tree\n");
590 if (0 <= it
->entry_count
) {
591 struct object
*obj
= parse_object(it
->sha1
);
593 error("%s: invalid sha1 pointer in cache-tree",
594 sha1_to_hex(it
->sha1
));
598 mark_object_reachable(obj
);
599 if (obj
->type
!= OBJ_TREE
)
600 err
|= objerror(obj
, "non-tree in cache-tree");
602 for (i
= 0; i
< it
->subtree_nr
; i
++)
603 err
|= fsck_cache_tree(it
->down
[i
]->cache_tree
);
607 static char const * const fsck_usage
[] = {
608 "git fsck [options] [<object>...]",
612 static struct option fsck_opts
[] = {
613 OPT__VERBOSE(&verbose
, "be verbose"),
614 OPT_BOOLEAN(0, "unreachable", &show_unreachable
, "show unreachable objects"),
615 OPT_BOOL(0, "dangling", &show_dangling
, "show dangling objects"),
616 OPT_BOOLEAN(0, "tags", &show_tags
, "report tags"),
617 OPT_BOOLEAN(0, "root", &show_root
, "report root nodes"),
618 OPT_BOOLEAN(0, "cache", &keep_cache_objects
, "make index objects head nodes"),
619 OPT_BOOLEAN(0, "reflogs", &include_reflogs
, "make reflogs head nodes (default)"),
620 OPT_BOOLEAN(0, "full", &check_full
, "also consider packs and alternate objects"),
621 OPT_BOOLEAN(0, "strict", &check_strict
, "enable more strict checking"),
622 OPT_BOOLEAN(0, "lost-found", &write_lost_and_found
,
623 "write dangling objects in .git/lost-found"),
624 OPT_BOOL(0, "progress", &show_progress
, "show progress"),
628 int cmd_fsck(int argc
, const char **argv
, const char *prefix
)
631 struct alternate_object_database
*alt
;
634 read_replace_refs
= 0;
636 argc
= parse_options(argc
, argv
, prefix
, fsck_opts
, fsck_usage
, 0);
638 if (show_progress
== -1)
639 show_progress
= isatty(2);
643 if (write_lost_and_found
) {
649 fsck_object_dir(get_object_directory());
652 for (alt
= alt_odb_list
; alt
; alt
= alt
->next
) {
653 char namebuf
[PATH_MAX
];
654 int namelen
= alt
->name
- alt
->base
;
655 memcpy(namebuf
, alt
->base
, namelen
);
656 namebuf
[namelen
- 1] = 0;
657 fsck_object_dir(namebuf
);
661 struct packed_git
*p
;
662 uint32_t total
= 0, count
= 0;
663 struct progress
*progress
= NULL
;
665 prepare_packed_git();
668 for (p
= packed_git
; p
; p
= p
->next
) {
669 if (open_pack_index(p
))
671 total
+= p
->num_objects
;
674 progress
= start_progress("Checking objects", total
);
676 for (p
= packed_git
; p
; p
= p
->next
) {
677 /* verify gives error messages itself */
678 if (verify_pack(p
, fsck_obj_buffer
,
680 errors_found
|= ERROR_PACK
;
681 count
+= p
->num_objects
;
683 stop_progress(&progress
);
687 for (i
= 0; i
< argc
; i
++) {
688 const char *arg
= argv
[i
];
689 unsigned char sha1
[20];
690 if (!get_sha1(arg
, sha1
)) {
691 struct object
*obj
= lookup_object(sha1
);
693 /* Error is printed by lookup_object(). */
698 mark_object_reachable(obj
);
702 error("invalid parameter: expected sha1, got '%s'", arg
);
706 * If we've not been given any explicit head information, do the
707 * default ones from .git/refs. We also consider the index file
708 * in this case (ie this implies --cache).
712 keep_cache_objects
= 1;
715 if (keep_cache_objects
) {
717 for (i
= 0; i
< active_nr
; i
++) {
722 mode
= active_cache
[i
]->ce_mode
;
723 if (S_ISGITLINK(mode
))
725 blob
= lookup_blob(active_cache
[i
]->sha1
);
730 mark_object_reachable(obj
);
732 if (active_cache_tree
)
733 fsck_cache_tree(active_cache_tree
);
736 check_connectivity();