9 #include "cache-tree.h"
10 #include "tree-walk.h"
12 #include "parse-options.h"
15 #define REACHABLE 0x0001
20 static int show_unreachable
;
21 static int include_reflogs
= 1;
22 static int check_full
;
23 static int check_strict
;
24 static int keep_cache_objects
;
25 static unsigned char head_sha1
[20];
26 static int errors_found
;
27 static int write_lost_and_found
;
29 #define ERROR_OBJECT 01
30 #define ERROR_REACHABLE 02
32 #ifdef NO_D_INO_IN_DIRENT
34 #define DIRENT_SORT_HINT(de) 0
37 #define DIRENT_SORT_HINT(de) ((de)->d_ino)
40 static void objreport(struct object
*obj
, const char *severity
,
41 const char *err
, va_list params
)
43 fprintf(stderr
, "%s in %s %s: ",
44 severity
, typename(obj
->type
), sha1_to_hex(obj
->sha1
));
45 vfprintf(stderr
, err
, params
);
49 static int objerror(struct object
*obj
, const char *err
, ...)
52 va_start(params
, err
);
53 errors_found
|= ERROR_OBJECT
;
54 objreport(obj
, "error", err
, params
);
59 static int fsck_error_func(struct object
*obj
, int type
, const char *err
, ...)
62 va_start(params
, err
);
63 objreport(obj
, (type
== FSCK_WARN
) ? "warning" : "error", err
, params
);
65 return (type
== FSCK_WARN
) ? 0 : 1;
68 static struct object_array pending
;
70 static int mark_object(struct object
*obj
, int type
, void *data
)
72 struct object
*parent
= data
;
75 printf("broken link from %7s %s\n",
76 typename(parent
->type
), sha1_to_hex(parent
->sha1
));
77 printf("broken link from %7s %s\n",
78 (type
== OBJ_ANY
? "unknown" : typename(type
)), "unknown");
79 errors_found
|= ERROR_REACHABLE
;
83 if (type
!= OBJ_ANY
&& obj
->type
!= type
)
84 objerror(parent
, "wrong object type in link");
86 if (obj
->flags
& REACHABLE
)
88 obj
->flags
|= REACHABLE
;
90 if (parent
&& !has_sha1_file(obj
->sha1
)) {
91 printf("broken link from %7s %s\n",
92 typename(parent
->type
), sha1_to_hex(parent
->sha1
));
93 printf(" to %7s %s\n",
94 typename(obj
->type
), sha1_to_hex(obj
->sha1
));
95 errors_found
|= ERROR_REACHABLE
;
100 add_object_array(obj
, (void *) parent
, &pending
);
104 static void mark_object_reachable(struct object
*obj
)
106 mark_object(obj
, OBJ_ANY
, 0);
109 static int traverse_one_object(struct object
*obj
, struct object
*parent
)
112 struct tree
*tree
= NULL
;
114 if (obj
->type
== OBJ_TREE
) {
116 tree
= (struct tree
*)obj
;
117 if (parse_tree(tree
) < 0)
118 return 1; /* error already displayed */
120 result
= fsck_walk(obj
, mark_object
, obj
);
128 static int traverse_reachable(void)
132 struct object_array_entry
*entry
;
133 struct object
*obj
, *parent
;
135 entry
= pending
.objects
+ --pending
.nr
;
137 parent
= (struct object
*) entry
->name
;
138 result
|= traverse_one_object(obj
, parent
);
143 static int mark_used(struct object
*obj
, int type
, void *data
)
152 * Check a single reachable object
154 static void check_reachable_object(struct object
*obj
)
157 * We obviously want the object to be parsed,
158 * except if it was in a pack-file and we didn't
162 if (has_sha1_pack(obj
->sha1
, NULL
))
163 return; /* it is in pack - forget about it */
164 printf("missing %s %s\n", typename(obj
->type
), sha1_to_hex(obj
->sha1
));
165 errors_found
|= ERROR_REACHABLE
;
171 * Check a single unreachable object
173 static void check_unreachable_object(struct object
*obj
)
176 * Missing unreachable object? Ignore it. It's not like
177 * we miss it (since it can't be reached), nor do we want
178 * to complain about it being unreachable (since it does
185 * Unreachable object that exists? Show it if asked to,
186 * since this is something that is prunable.
188 if (show_unreachable
) {
189 printf("unreachable %s %s\n", typename(obj
->type
), sha1_to_hex(obj
->sha1
));
194 * "!used" means that nothing at all points to it, including
195 * other unreachable objects. In other words, it's the "tip"
196 * of some set of unreachable objects, usually a commit that
199 * Such starting points are more interesting than some random
200 * set of unreachable objects, so we show them even if the user
201 * hasn't asked for _all_ unreachable objects. If you have
202 * deleted a branch by mistake, this is a prime candidate to
203 * start looking at, for example.
206 printf("dangling %s %s\n", typename(obj
->type
),
207 sha1_to_hex(obj
->sha1
));
208 if (write_lost_and_found
) {
209 char *filename
= git_path("lost-found/%s/%s",
210 obj
->type
== OBJ_COMMIT
? "commit" : "other",
211 sha1_to_hex(obj
->sha1
));
214 if (safe_create_leading_directories(filename
)) {
215 error("Could not create lost-found");
218 if (!(f
= fopen(filename
, "w")))
219 die("Could not open %s", filename
);
220 if (obj
->type
== OBJ_BLOB
) {
221 enum object_type type
;
223 char *buf
= read_sha1_file(obj
->sha1
,
226 if (fwrite(buf
, size
, 1, f
) != 1)
227 die("Could not write %s: %s",
228 filename
, strerror(errno
));
232 fprintf(f
, "%s\n", sha1_to_hex(obj
->sha1
));
234 die("Could not finish %s: %s",
235 filename
, strerror(errno
));
241 * Otherwise? It's there, it's unreachable, and some other unreachable
242 * object points to it. Ignore it - it's not interesting, and we showed
243 * all the interesting cases above.
247 static void check_object(struct object
*obj
)
250 fprintf(stderr
, "Checking %s\n", sha1_to_hex(obj
->sha1
));
252 if (obj
->flags
& REACHABLE
)
253 check_reachable_object(obj
);
255 check_unreachable_object(obj
);
258 static void check_connectivity(void)
262 /* Traverse the pending reachable objects */
263 traverse_reachable();
265 /* Look up all the requirements, warn about missing objects.. */
266 max
= get_max_object_index();
268 fprintf(stderr
, "Checking connectivity (%d objects)\n", max
);
270 for (i
= 0; i
< max
; i
++) {
271 struct object
*obj
= get_indexed_object(i
);
278 static int fsck_sha1(const unsigned char *sha1
)
280 struct object
*obj
= parse_object(sha1
);
282 errors_found
|= ERROR_OBJECT
;
283 return error("%s: object corrupt or missing",
286 if (obj
->flags
& SEEN
)
291 fprintf(stderr
, "Checking %s %s\n",
292 typename(obj
->type
), sha1_to_hex(obj
->sha1
));
294 if (fsck_walk(obj
, mark_used
, 0))
295 objerror(obj
, "broken links");
296 if (fsck_object(obj
, check_strict
, fsck_error_func
))
299 if (obj
->type
== OBJ_TREE
) {
300 struct tree
*item
= (struct tree
*) obj
;
306 if (obj
->type
== OBJ_COMMIT
) {
307 struct commit
*commit
= (struct commit
*) obj
;
309 free(commit
->buffer
);
310 commit
->buffer
= NULL
;
312 if (!commit
->parents
&& show_root
)
313 printf("root %s\n", sha1_to_hex(commit
->object
.sha1
));
316 if (obj
->type
== OBJ_TAG
) {
317 struct tag
*tag
= (struct tag
*) obj
;
319 if (show_tags
&& tag
->tagged
) {
320 printf("tagged %s %s", typename(tag
->tagged
->type
), sha1_to_hex(tag
->tagged
->sha1
));
321 printf(" (%s) in %s\n", tag
->tag
, sha1_to_hex(tag
->object
.sha1
));
329 * This is the sorting chunk size: make it reasonably
330 * big so that we can sort well..
332 #define MAX_SHA1_ENTRIES (1024)
336 unsigned char sha1
[20];
341 struct sha1_entry
*entry
[MAX_SHA1_ENTRIES
];
344 static int ino_compare(const void *_a
, const void *_b
)
346 const struct sha1_entry
*a
= _a
, *b
= _b
;
347 unsigned long ino1
= a
->ino
, ino2
= b
->ino
;
348 return ino1
< ino2
? -1 : ino1
> ino2
? 1 : 0;
351 static void fsck_sha1_list(void)
353 int i
, nr
= sha1_list
.nr
;
356 qsort(sha1_list
.entry
, nr
,
357 sizeof(struct sha1_entry
*), ino_compare
);
358 for (i
= 0; i
< nr
; i
++) {
359 struct sha1_entry
*entry
= sha1_list
.entry
[i
];
360 unsigned char *sha1
= entry
->sha1
;
362 sha1_list
.entry
[i
] = NULL
;
369 static void add_sha1_list(unsigned char *sha1
, unsigned long ino
)
371 struct sha1_entry
*entry
= xmalloc(sizeof(*entry
));
375 hashcpy(entry
->sha1
, sha1
);
377 if (nr
== MAX_SHA1_ENTRIES
) {
381 sha1_list
.entry
[nr
] = entry
;
385 static void fsck_dir(int i
, char *path
)
387 DIR *dir
= opendir(path
);
394 fprintf(stderr
, "Checking directory %s\n", path
);
396 while ((de
= readdir(dir
)) != NULL
) {
398 unsigned char sha1
[20];
400 if (is_dot_or_dotdot(de
->d_name
))
402 if (strlen(de
->d_name
) == 38) {
403 sprintf(name
, "%02x", i
);
404 memcpy(name
+2, de
->d_name
, 39);
405 if (get_sha1_hex(name
, sha1
) < 0)
407 add_sha1_list(sha1
, DIRENT_SORT_HINT(de
));
410 if (!prefixcmp(de
->d_name
, "tmp_obj_"))
412 fprintf(stderr
, "bad sha1 file: %s/%s\n", path
, de
->d_name
);
417 static int default_refs
;
419 static int fsck_handle_reflog_ent(unsigned char *osha1
, unsigned char *nsha1
,
420 const char *email
, unsigned long timestamp
, int tz
,
421 const char *message
, void *cb_data
)
426 fprintf(stderr
, "Checking reflog %s->%s\n",
427 sha1_to_hex(osha1
), sha1_to_hex(nsha1
));
429 if (!is_null_sha1(osha1
)) {
430 obj
= lookup_object(osha1
);
433 mark_object_reachable(obj
);
436 obj
= lookup_object(nsha1
);
439 mark_object_reachable(obj
);
444 static int fsck_handle_reflog(const char *logname
, const unsigned char *sha1
, int flag
, void *cb_data
)
446 for_each_reflog_ent(logname
, fsck_handle_reflog_ent
, NULL
);
450 static int is_branch(const char *refname
)
452 return !strcmp(refname
, "HEAD") || !prefixcmp(refname
, "refs/heads/");
455 static int fsck_handle_ref(const char *refname
, const unsigned char *sha1
, int flag
, void *cb_data
)
459 obj
= parse_object(sha1
);
461 error("%s: invalid sha1 pointer %s", refname
, sha1_to_hex(sha1
));
462 /* We'll continue with the rest despite the error.. */
465 if (obj
->type
!= OBJ_COMMIT
&& is_branch(refname
))
466 error("%s: not a commit", refname
);
469 mark_object_reachable(obj
);
474 static void get_default_heads(void)
476 for_each_ref(fsck_handle_ref
, NULL
);
478 for_each_reflog(fsck_handle_reflog
, NULL
);
481 * Not having any default heads isn't really fatal, but
482 * it does mean that "--unreachable" no longer makes any
483 * sense (since in this case everything will obviously
484 * be unreachable by definition.
486 * Showing dangling objects is valid, though (as those
487 * dangling objects are likely lost heads).
489 * So we just print a warning about it, and clear the
490 * "show_unreachable" flag.
493 fprintf(stderr
, "notice: No default references\n");
494 show_unreachable
= 0;
498 static void fsck_object_dir(const char *path
)
503 fprintf(stderr
, "Checking object directory\n");
505 for (i
= 0; i
< 256; i
++) {
506 static char dir
[4096];
507 sprintf(dir
, "%s/%02x", path
, i
);
513 static int fsck_head_link(void)
515 unsigned char sha1
[20];
517 int null_is_error
= 0;
518 const char *head_points_at
= resolve_ref("HEAD", sha1
, 0, &flag
);
521 fprintf(stderr
, "Checking HEAD link\n");
524 return error("Invalid HEAD");
525 if (!strcmp(head_points_at
, "HEAD"))
528 else if (prefixcmp(head_points_at
, "refs/heads/"))
529 return error("HEAD points to something strange (%s)",
531 if (is_null_sha1(sha1
)) {
533 return error("HEAD: detached HEAD points at nothing");
534 fprintf(stderr
, "notice: HEAD points to an unborn branch (%s)\n",
535 head_points_at
+ 11);
540 static int fsck_cache_tree(struct cache_tree
*it
)
546 fprintf(stderr
, "Checking cache tree\n");
548 if (0 <= it
->entry_count
) {
549 struct object
*obj
= parse_object(it
->sha1
);
551 error("%s: invalid sha1 pointer in cache-tree",
552 sha1_to_hex(it
->sha1
));
555 mark_object_reachable(obj
);
557 if (obj
->type
!= OBJ_TREE
)
558 err
|= objerror(obj
, "non-tree in cache-tree");
560 for (i
= 0; i
< it
->subtree_nr
; i
++)
561 err
|= fsck_cache_tree(it
->down
[i
]->cache_tree
);
565 static char const * const fsck_usage
[] = {
566 "git fsck [options] [<object>...]",
570 static struct option fsck_opts
[] = {
571 OPT__VERBOSE(&verbose
),
572 OPT_BOOLEAN(0, "unreachable", &show_unreachable
, "show unreachable objects"),
573 OPT_BOOLEAN(0, "tags", &show_tags
, "report tags"),
574 OPT_BOOLEAN(0, "root", &show_root
, "report root nodes"),
575 OPT_BOOLEAN(0, "cache", &keep_cache_objects
, "make index objects head nodes"),
576 OPT_BOOLEAN(0, "reflogs", &include_reflogs
, "make reflogs head nodes (default)"),
577 OPT_BOOLEAN(0, "full", &check_full
, "also consider alternate objects"),
578 OPT_BOOLEAN(0, "strict", &check_strict
, "enable more strict checking"),
579 OPT_BOOLEAN(0, "lost-found", &write_lost_and_found
,
580 "write dangling objects in .git/lost-found"),
584 int cmd_fsck(int argc
, const char **argv
, const char *prefix
)
590 argc
= parse_options(argc
, argv
, fsck_opts
, fsck_usage
, 0);
591 if (write_lost_and_found
) {
597 fsck_object_dir(get_object_directory());
599 struct alternate_object_database
*alt
;
600 struct packed_git
*p
;
602 for (alt
= alt_odb_list
; alt
; alt
= alt
->next
) {
603 char namebuf
[PATH_MAX
];
604 int namelen
= alt
->name
- alt
->base
;
605 memcpy(namebuf
, alt
->base
, namelen
);
606 namebuf
[namelen
- 1] = 0;
607 fsck_object_dir(namebuf
);
609 prepare_packed_git();
610 for (p
= packed_git
; p
; p
= p
->next
)
611 /* verify gives error messages itself */
614 for (p
= packed_git
; p
; p
= p
->next
) {
616 if (open_pack_index(p
))
618 num
= p
->num_objects
;
619 for (j
= 0; j
< num
; j
++)
620 fsck_sha1(nth_packed_object_sha1(p
, j
));
625 for (i
= 1; i
< argc
; i
++) {
626 const char *arg
= argv
[i
];
627 if (!get_sha1(arg
, head_sha1
)) {
628 struct object
*obj
= lookup_object(head_sha1
);
630 /* Error is printed by lookup_object(). */
635 mark_object_reachable(obj
);
639 error("invalid parameter: expected sha1, got '%s'", arg
);
643 * If we've not been given any explicit head information, do the
644 * default ones from .git/refs. We also consider the index file
645 * in this case (ie this implies --cache).
649 keep_cache_objects
= 1;
652 if (keep_cache_objects
) {
654 for (i
= 0; i
< active_nr
; i
++) {
659 mode
= active_cache
[i
]->ce_mode
;
660 if (S_ISGITLINK(mode
))
662 blob
= lookup_blob(active_cache
[i
]->sha1
);
667 mark_object_reachable(obj
);
669 if (active_cache_tree
)
670 fsck_cache_tree(active_cache_tree
);
673 check_connectivity();