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Commit | Line | Data |
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20222118 LT |
1 | #include <sys/types.h> |
2 | #include <dirent.h> | |
3 | ||
4b182421 | 4 | #include "cache.h" |
ff5ebe39 DB |
5 | #include "commit.h" |
6 | #include "tree.h" | |
7 | #include "blob.h" | |
c418eda4 | 8 | #include "tag.h" |
d1af002d | 9 | #include "delta.h" |
ff5ebe39 DB |
10 | |
11 | #define REACHABLE 0x0001 | |
d9839e03 | 12 | |
ab7df187 | 13 | static int show_root = 0; |
889262ea | 14 | static int show_tags = 0; |
d9839e03 | 15 | static int show_unreachable = 0; |
d1af002d | 16 | static int show_max_delta_depth = 0; |
ae7c0c92 | 17 | static int keep_cache_objects = 0; |
d9839e03 LT |
18 | static unsigned char head_sha1[20]; |
19 | ||
d1af002d NP |
20 | static void expand_deltas(void) |
21 | { | |
22 | int i, max_depth = 0; | |
23 | ||
24 | /* | |
25 | * To be as efficient as possible we look for delta heads and | |
26 | * recursively process them going backward, and parsing | |
27 | * resulting objects along the way. This allows for processing | |
28 | * each delta objects only once regardless of the delta depth. | |
29 | */ | |
30 | for (i = 0; i < nr_objs; i++) { | |
31 | struct object *obj = objs[i]; | |
32 | if (obj->parsed && !obj->delta && obj->attached_deltas) { | |
33 | int depth = 0; | |
34 | char type[10]; | |
35 | unsigned long size; | |
36 | void *buf = read_sha1_file(obj->sha1, type, &size); | |
37 | if (!buf) | |
38 | continue; | |
39 | depth = process_deltas(buf, size, obj->type, | |
40 | obj->attached_deltas); | |
41 | if (max_depth < depth) | |
42 | max_depth = depth; | |
43 | } | |
44 | } | |
45 | if (show_max_delta_depth) | |
46 | printf("maximum delta depth = %d\n", max_depth); | |
47 | } | |
48 | ||
8ba0bbb2 LT |
49 | static void check_connectivity(void) |
50 | { | |
51 | int i; | |
52 | ||
8ba0bbb2 | 53 | /* Look up all the requirements, warn about missing objects.. */ |
ff5ebe39 DB |
54 | for (i = 0; i < nr_objs; i++) { |
55 | struct object *obj = objs[i]; | |
c418eda4 | 56 | struct object_list *refs; |
8ba0bbb2 | 57 | |
3a6a23e6 | 58 | if (!obj->parsed) { |
d1af002d NP |
59 | if (obj->delta) |
60 | printf("unresolved delta %s\n", | |
61 | sha1_to_hex(obj->sha1)); | |
62 | else | |
63 | printf("missing %s %s\n", | |
64 | obj->type, sha1_to_hex(obj->sha1)); | |
3a6a23e6 LT |
65 | continue; |
66 | } | |
67 | ||
68 | for (refs = obj->refs; refs; refs = refs->next) { | |
69 | if (refs->item->parsed) | |
70 | continue; | |
71 | printf("broken link from %7s %s\n", | |
72 | obj->type, sha1_to_hex(obj->sha1)); | |
73 | printf(" to %7s %s\n", | |
aa034134 | 74 | refs->item->type, sha1_to_hex(refs->item->sha1)); |
3a6a23e6 LT |
75 | } |
76 | ||
77 | /* Don't bother with tag reachability. */ | |
78 | if (obj->type == tag_type) | |
79 | continue; | |
80 | ||
ff5ebe39 | 81 | if (show_unreachable && !(obj->flags & REACHABLE)) { |
d1af002d NP |
82 | if (obj->attached_deltas) |
83 | printf("foreign delta reference %s\n", | |
84 | sha1_to_hex(obj->sha1)); | |
85 | else | |
86 | printf("unreachable %s %s\n", | |
87 | obj->type, sha1_to_hex(obj->sha1)); | |
8ba0bbb2 | 88 | continue; |
d9839e03 | 89 | } |
8ba0bbb2 | 90 | |
ff5ebe39 DB |
91 | if (!obj->used) { |
92 | printf("dangling %s %s\n", obj->type, | |
93 | sha1_to_hex(obj->sha1)); | |
d9839e03 | 94 | } |
8ba0bbb2 LT |
95 | } |
96 | } | |
97 | ||
85003492 LT |
98 | /* |
99 | * The entries in a tree are ordered in the _path_ order, | |
100 | * which means that a directory entry is ordered by adding | |
101 | * a slash to the end of it. | |
102 | * | |
103 | * So a directory called "a" is ordered _after_ a file | |
104 | * called "a.c", because "a/" sorts after "a.c". | |
105 | */ | |
a4f35a2d JH |
106 | #define TREE_UNORDERED (-1) |
107 | #define TREE_HAS_DUPS (-2) | |
108 | ||
85003492 LT |
109 | static int verify_ordered(struct tree_entry_list *a, struct tree_entry_list *b) |
110 | { | |
111 | int len1 = strlen(a->name); | |
112 | int len2 = strlen(b->name); | |
113 | int len = len1 < len2 ? len1 : len2; | |
114 | unsigned char c1, c2; | |
115 | int cmp; | |
116 | ||
117 | cmp = memcmp(a->name, b->name, len); | |
118 | if (cmp < 0) | |
119 | return 0; | |
120 | if (cmp > 0) | |
a4f35a2d | 121 | return TREE_UNORDERED; |
85003492 LT |
122 | |
123 | /* | |
124 | * Ok, the first <len> characters are the same. | |
125 | * Now we need to order the next one, but turn | |
126 | * a '\0' into a '/' for a directory entry. | |
127 | */ | |
128 | c1 = a->name[len]; | |
129 | c2 = b->name[len]; | |
a4f35a2d JH |
130 | if (!c1 && !c2) |
131 | /* | |
132 | * git-write-tree used to write out a nonsense tree that has | |
133 | * entries with the same name, one blob and one tree. Make | |
134 | * sure we do not have duplicate entries. | |
135 | */ | |
136 | return TREE_HAS_DUPS; | |
85003492 LT |
137 | if (!c1 && a->directory) |
138 | c1 = '/'; | |
139 | if (!c2 && b->directory) | |
140 | c2 = '/'; | |
a4f35a2d | 141 | return c1 < c2 ? 0 : TREE_UNORDERED; |
85003492 LT |
142 | } |
143 | ||
c418eda4 | 144 | static int fsck_tree(struct tree *item) |
20222118 | 145 | { |
85003492 LT |
146 | int has_full_path = 0; |
147 | struct tree_entry_list *entry, *last; | |
148 | ||
149 | last = NULL; | |
150 | for (entry = item->entries; entry; entry = entry->next) { | |
151 | if (strchr(entry->name, '/')) | |
152 | has_full_path = 1; | |
153 | ||
42ea9cb2 LT |
154 | switch (entry->mode) { |
155 | /* | |
156 | * Standard modes.. | |
157 | */ | |
158 | case S_IFREG | 0755: | |
159 | case S_IFREG | 0644: | |
160 | case S_IFLNK: | |
161 | case S_IFDIR: | |
162 | break; | |
163 | /* | |
164 | * This is nonstandard, but we had a few of these | |
165 | * early on when we honored the full set of mode | |
166 | * bits.. | |
167 | */ | |
168 | case S_IFREG | 0664: | |
169 | break; | |
170 | default: | |
171 | printf("tree %s has entry %o %s\n", | |
172 | sha1_to_hex(item->object.sha1), | |
173 | entry->mode, entry->name); | |
174 | } | |
175 | ||
85003492 | 176 | if (last) { |
a4f35a2d JH |
177 | switch (verify_ordered(last, entry)) { |
178 | case TREE_UNORDERED: | |
85003492 LT |
179 | fprintf(stderr, "tree %s not ordered\n", |
180 | sha1_to_hex(item->object.sha1)); | |
181 | return -1; | |
a4f35a2d JH |
182 | case TREE_HAS_DUPS: |
183 | fprintf(stderr, "tree %s has duplicate entries for '%s'\n", | |
184 | sha1_to_hex(item->object.sha1), | |
185 | entry->name); | |
186 | return -1; | |
187 | default: | |
188 | break; | |
85003492 LT |
189 | } |
190 | } | |
191 | ||
192 | last = entry; | |
193 | } | |
194 | ||
195 | if (has_full_path) { | |
667bb59b | 196 | fprintf(stderr, "warning: git-fsck-cache: tree %s " |
c418eda4 DB |
197 | "has full pathnames in it\n", |
198 | sha1_to_hex(item->object.sha1)); | |
1ea34e36 | 199 | } |
85003492 | 200 | |
59c1e249 | 201 | return 0; |
1ea34e36 LT |
202 | } |
203 | ||
c418eda4 | 204 | static int fsck_commit(struct commit *commit) |
1ea34e36 | 205 | { |
ff5ebe39 | 206 | if (!commit->tree) |
1ea34e36 | 207 | return -1; |
ab7df187 | 208 | if (!commit->parents && show_root) |
c418eda4 | 209 | printf("root %s\n", sha1_to_hex(commit->object.sha1)); |
e6948b6d | 210 | if (!commit->date) |
c418eda4 DB |
211 | printf("bad commit date in %s\n", |
212 | sha1_to_hex(commit->object.sha1)); | |
4728b861 LT |
213 | return 0; |
214 | } | |
215 | ||
c418eda4 | 216 | static int fsck_tag(struct tag *tag) |
ec4465ad | 217 | { |
92d4c85d LT |
218 | struct object *tagged = tag->tagged; |
219 | ||
220 | if (!tagged) { | |
221 | printf("bad object in tag %s\n", sha1_to_hex(tag->object.sha1)); | |
222 | return -1; | |
223 | } | |
889262ea LT |
224 | if (!show_tags) |
225 | return 0; | |
226 | ||
92d4c85d LT |
227 | printf("tagged %s %s", tagged->type, sha1_to_hex(tagged->sha1)); |
228 | printf(" (%s) in %s\n", tag->tag, sha1_to_hex(tag->object.sha1)); | |
ff5ebe39 | 229 | return 0; |
20222118 LT |
230 | } |
231 | ||
7e8c174a | 232 | static int fsck_sha1(unsigned char *sha1) |
20222118 | 233 | { |
7e8c174a LT |
234 | struct object *obj = parse_object(sha1); |
235 | if (!obj) | |
236 | return -1; | |
237 | if (obj->type == blob_type) | |
238 | return 0; | |
239 | if (obj->type == tree_type) | |
240 | return fsck_tree((struct tree *) obj); | |
241 | if (obj->type == commit_type) | |
242 | return fsck_commit((struct commit *) obj); | |
243 | if (obj->type == tag_type) | |
244 | return fsck_tag((struct tag *) obj); | |
d1af002d NP |
245 | if (!obj->type && obj->delta) |
246 | return 0; | |
7e8c174a LT |
247 | return -1; |
248 | } | |
249 | ||
250 | /* | |
251 | * This is the sorting chunk size: make it reasonably | |
252 | * big so that we can sort well.. | |
253 | */ | |
254 | #define MAX_SHA1_ENTRIES (1024) | |
255 | ||
256 | struct sha1_entry { | |
257 | unsigned long ino; | |
20222118 | 258 | unsigned char sha1[20]; |
7e8c174a LT |
259 | }; |
260 | ||
261 | static struct { | |
262 | unsigned long nr; | |
263 | struct sha1_entry *entry[MAX_SHA1_ENTRIES]; | |
264 | } sha1_list; | |
265 | ||
266 | static int ino_compare(const void *_a, const void *_b) | |
267 | { | |
268 | const struct sha1_entry *a = _a, *b = _b; | |
269 | unsigned long ino1 = a->ino, ino2 = b->ino; | |
270 | return ino1 < ino2 ? -1 : ino1 > ino2 ? 1 : 0; | |
271 | } | |
272 | ||
273 | static void fsck_sha1_list(void) | |
274 | { | |
275 | int i, nr = sha1_list.nr; | |
276 | ||
277 | qsort(sha1_list.entry, nr, sizeof(struct sha1_entry *), ino_compare); | |
278 | for (i = 0; i < nr; i++) { | |
279 | struct sha1_entry *entry = sha1_list.entry[i]; | |
280 | unsigned char *sha1 = entry->sha1; | |
281 | ||
282 | sha1_list.entry[i] = NULL; | |
283 | if (fsck_sha1(sha1) < 0) | |
284 | fprintf(stderr, "bad sha1 entry '%s'\n", sha1_to_hex(sha1)); | |
285 | free(entry); | |
20222118 | 286 | } |
7e8c174a LT |
287 | sha1_list.nr = 0; |
288 | } | |
289 | ||
290 | static void add_sha1_list(unsigned char *sha1, unsigned long ino) | |
291 | { | |
292 | struct sha1_entry *entry = xmalloc(sizeof(*entry)); | |
293 | int nr; | |
294 | ||
295 | entry->ino = ino; | |
296 | memcpy(entry->sha1, sha1, 20); | |
297 | nr = sha1_list.nr; | |
298 | if (nr == MAX_SHA1_ENTRIES) { | |
299 | fsck_sha1_list(); | |
300 | nr = 0; | |
301 | } | |
302 | sha1_list.entry[nr] = entry; | |
303 | sha1_list.nr = ++nr; | |
20222118 LT |
304 | } |
305 | ||
306 | static int fsck_dir(int i, char *path) | |
307 | { | |
308 | DIR *dir = opendir(path); | |
309 | struct dirent *de; | |
310 | ||
311 | if (!dir) { | |
2de381f9 | 312 | return error("missing sha1 directory '%s'", path); |
20222118 LT |
313 | } |
314 | ||
315 | while ((de = readdir(dir)) != NULL) { | |
316 | char name[100]; | |
7e8c174a | 317 | unsigned char sha1[20]; |
20222118 LT |
318 | int len = strlen(de->d_name); |
319 | ||
320 | switch (len) { | |
321 | case 2: | |
322 | if (de->d_name[1] != '.') | |
323 | break; | |
324 | case 1: | |
325 | if (de->d_name[0] != '.') | |
326 | break; | |
327 | continue; | |
328 | case 38: | |
329 | sprintf(name, "%02x", i); | |
330 | memcpy(name+2, de->d_name, len+1); | |
7e8c174a LT |
331 | if (get_sha1_hex(name, sha1) < 0) |
332 | break; | |
333 | add_sha1_list(sha1, de->d_ino); | |
334 | continue; | |
20222118 LT |
335 | } |
336 | fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name); | |
337 | } | |
338 | closedir(dir); | |
339 | return 0; | |
340 | } | |
341 | ||
7c4d07c7 | 342 | static int read_sha1_reference(const char *path) |
1024932f LT |
343 | { |
344 | char hexname[60]; | |
345 | unsigned char sha1[20]; | |
346 | int fd = open(path, O_RDONLY), len; | |
347 | struct object *obj; | |
348 | ||
349 | if (fd < 0) | |
7c4d07c7 | 350 | return -1; |
1024932f LT |
351 | |
352 | len = read(fd, hexname, sizeof(hexname)); | |
353 | close(fd); | |
354 | if (len < 40) | |
7c4d07c7 | 355 | return -1; |
1024932f LT |
356 | |
357 | if (get_sha1_hex(hexname, sha1) < 0) | |
7c4d07c7 | 358 | return -1; |
1024932f LT |
359 | |
360 | obj = lookup_object(sha1); | |
7c4d07c7 LT |
361 | if (!obj) |
362 | return error("%s: invalid sha1 pointer %.40s", path, hexname); | |
363 | ||
1024932f LT |
364 | obj->used = 1; |
365 | mark_reachable(obj, REACHABLE); | |
7c4d07c7 | 366 | return 0; |
1024932f LT |
367 | } |
368 | ||
369 | static void find_file_objects(const char *base, const char *name) | |
370 | { | |
371 | int baselen = strlen(base); | |
372 | int namelen = strlen(name); | |
373 | char *path = xmalloc(baselen + namelen + 2); | |
374 | struct stat st; | |
375 | ||
376 | memcpy(path, base, baselen); | |
377 | path[baselen] = '/'; | |
378 | memcpy(path + baselen + 1, name, namelen+1); | |
379 | if (stat(path, &st) < 0) | |
380 | return; | |
381 | ||
382 | /* | |
383 | * Recurse into directories | |
384 | */ | |
385 | if (S_ISDIR(st.st_mode)) { | |
386 | DIR *dir = opendir(path); | |
387 | if (dir) { | |
388 | struct dirent *de; | |
389 | while ((de = readdir(dir)) != NULL) { | |
390 | if (de->d_name[0] == '.') | |
391 | continue; | |
392 | find_file_objects(path, de->d_name); | |
393 | } | |
394 | closedir(dir); | |
395 | } | |
396 | return; | |
397 | } | |
398 | if (S_ISREG(st.st_mode)) { | |
399 | read_sha1_reference(path); | |
400 | return; | |
401 | } | |
402 | } | |
403 | ||
404 | static void get_default_heads(void) | |
405 | { | |
406 | char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT; | |
407 | find_file_objects(git_dir, "refs"); | |
408 | } | |
409 | ||
20222118 LT |
410 | int main(int argc, char **argv) |
411 | { | |
bcee6fd8 | 412 | int i, heads; |
20222118 LT |
413 | char *sha1_dir; |
414 | ||
889262ea LT |
415 | for (i = 1; i < argc; i++) { |
416 | const char *arg = argv[i]; | |
417 | ||
418 | if (!strcmp(arg, "--unreachable")) { | |
419 | show_unreachable = 1; | |
420 | continue; | |
421 | } | |
422 | if (!strcmp(arg, "--tags")) { | |
423 | show_tags = 1; | |
424 | continue; | |
425 | } | |
ab7df187 LT |
426 | if (!strcmp(arg, "--root")) { |
427 | show_root = 1; | |
428 | continue; | |
429 | } | |
d1af002d NP |
430 | if (!strcmp(arg, "--delta-depth")) { |
431 | show_max_delta_depth = 1; | |
432 | continue; | |
433 | } | |
ae7c0c92 JH |
434 | if (!strcmp(arg, "--cache")) { |
435 | keep_cache_objects = 1; | |
436 | continue; | |
437 | } | |
889262ea | 438 | if (*arg == '-') |
667bb59b | 439 | usage("git-fsck-cache [--tags] [[--unreachable] [--cache] <head-sha1>*]"); |
889262ea LT |
440 | } |
441 | ||
ace1534d | 442 | sha1_dir = get_object_directory(); |
bcee6fd8 LT |
443 | for (i = 0; i < 256; i++) { |
444 | static char dir[4096]; | |
445 | sprintf(dir, "%s/%02x", sha1_dir, i); | |
446 | fsck_dir(i, dir); | |
447 | } | |
7e8c174a | 448 | fsck_sha1_list(); |
bcee6fd8 | 449 | |
d1af002d NP |
450 | expand_deltas(); |
451 | ||
bcee6fd8 | 452 | heads = 0; |
d9839e03 | 453 | for (i = 1; i < argc; i++) { |
889262ea LT |
454 | const char *arg = argv[i]; |
455 | ||
456 | if (*arg == '-') | |
d9839e03 | 457 | continue; |
889262ea | 458 | |
3c249c95 | 459 | if (!get_sha1(arg, head_sha1)) { |
770896e5 | 460 | struct object *obj = lookup_object(head_sha1); |
e1a1388d | 461 | |
770896e5 LT |
462 | /* Error is printed by lookup_object(). */ |
463 | if (!obj) | |
e1a1388d JF |
464 | continue; |
465 | ||
ff5ebe39 DB |
466 | obj->used = 1; |
467 | mark_reachable(obj, REACHABLE); | |
bcee6fd8 | 468 | heads++; |
d9839e03 LT |
469 | continue; |
470 | } | |
889262ea | 471 | error("expected sha1, got %s", arg); |
d9839e03 | 472 | } |
d9839e03 | 473 | |
1024932f | 474 | /* |
d1af002d | 475 | * If we've not been given any explicit head information, do the |
e7bd907d LT |
476 | * default ones from .git/refs. We also consider the index file |
477 | * in this case (ie this implies --cache). | |
1024932f | 478 | */ |
e7bd907d | 479 | if (!heads) { |
1024932f LT |
480 | get_default_heads(); |
481 | keep_cache_objects = 1; | |
482 | } | |
483 | ||
ae7c0c92 JH |
484 | if (keep_cache_objects) { |
485 | int i; | |
486 | read_cache(); | |
487 | for (i = 0; i < active_nr; i++) { | |
488 | struct blob *blob = lookup_blob(active_cache[i]->sha1); | |
489 | struct object *obj; | |
490 | if (!blob) | |
491 | continue; | |
492 | obj = &blob->object; | |
493 | obj->used = 1; | |
494 | mark_reachable(obj, REACHABLE); | |
495 | } | |
496 | } | |
497 | ||
8ba0bbb2 | 498 | check_connectivity(); |
20222118 LT |
499 | return 0; |
500 | } |