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1 | #include "cache.h" | |
2 | #include "config.h" | |
3 | #include "dir.h" | |
4 | #include "git-compat-util.h" | |
5 | #include "lockfile.h" | |
6 | #include "pack.h" | |
7 | #include "packfile.h" | |
8 | #include "commit.h" | |
9 | #include "object.h" | |
10 | #include "refs.h" | |
11 | #include "revision.h" | |
12 | #include "sha1-lookup.h" | |
13 | #include "commit-graph.h" | |
14 | #include "object-store.h" | |
15 | #include "alloc.h" | |
16 | #include "hashmap.h" | |
17 | #include "replace-object.h" | |
18 | #include "progress.h" | |
19 | ||
20 | #define GRAPH_SIGNATURE 0x43475048 /* "CGPH" */ | |
21 | #define GRAPH_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */ | |
22 | #define GRAPH_CHUNKID_OIDLOOKUP 0x4f49444c /* "OIDL" */ | |
23 | #define GRAPH_CHUNKID_DATA 0x43444154 /* "CDAT" */ | |
24 | #define GRAPH_CHUNKID_EXTRAEDGES 0x45444745 /* "EDGE" */ | |
25 | #define GRAPH_CHUNKID_BASE 0x42415345 /* "BASE" */ | |
26 | ||
27 | #define GRAPH_DATA_WIDTH (the_hash_algo->rawsz + 16) | |
28 | ||
29 | #define GRAPH_VERSION_1 0x1 | |
30 | #define GRAPH_VERSION GRAPH_VERSION_1 | |
31 | ||
32 | #define GRAPH_EXTRA_EDGES_NEEDED 0x80000000 | |
33 | #define GRAPH_EDGE_LAST_MASK 0x7fffffff | |
34 | #define GRAPH_PARENT_NONE 0x70000000 | |
35 | ||
36 | #define GRAPH_LAST_EDGE 0x80000000 | |
37 | ||
38 | #define GRAPH_HEADER_SIZE 8 | |
39 | #define GRAPH_FANOUT_SIZE (4 * 256) | |
40 | #define GRAPH_CHUNKLOOKUP_WIDTH 12 | |
41 | #define GRAPH_MIN_SIZE (GRAPH_HEADER_SIZE + 4 * GRAPH_CHUNKLOOKUP_WIDTH \ | |
42 | + GRAPH_FANOUT_SIZE + the_hash_algo->rawsz) | |
43 | ||
44 | char *get_commit_graph_filename(const char *obj_dir) | |
45 | { | |
46 | char *filename = xstrfmt("%s/info/commit-graph", obj_dir); | |
47 | char *normalized = xmalloc(strlen(filename) + 1); | |
48 | normalize_path_copy(normalized, filename); | |
49 | free(filename); | |
50 | return normalized; | |
51 | } | |
52 | ||
53 | static char *get_split_graph_filename(const char *obj_dir, | |
54 | const char *oid_hex) | |
55 | { | |
56 | char *filename = xstrfmt("%s/info/commit-graphs/graph-%s.graph", | |
57 | obj_dir, | |
58 | oid_hex); | |
59 | char *normalized = xmalloc(strlen(filename) + 1); | |
60 | normalize_path_copy(normalized, filename); | |
61 | free(filename); | |
62 | return normalized; | |
63 | } | |
64 | ||
65 | static char *get_chain_filename(const char *obj_dir) | |
66 | { | |
67 | return xstrfmt("%s/info/commit-graphs/commit-graph-chain", obj_dir); | |
68 | } | |
69 | ||
70 | static uint8_t oid_version(void) | |
71 | { | |
72 | return 1; | |
73 | } | |
74 | ||
75 | static struct commit_graph *alloc_commit_graph(void) | |
76 | { | |
77 | struct commit_graph *g = xcalloc(1, sizeof(*g)); | |
78 | g->graph_fd = -1; | |
79 | ||
80 | return g; | |
81 | } | |
82 | ||
83 | extern int read_replace_refs; | |
84 | ||
85 | static int commit_graph_compatible(struct repository *r) | |
86 | { | |
87 | if (!r->gitdir) | |
88 | return 0; | |
89 | ||
90 | if (read_replace_refs) { | |
91 | prepare_replace_object(r); | |
92 | if (hashmap_get_size(&r->objects->replace_map->map)) | |
93 | return 0; | |
94 | } | |
95 | ||
96 | prepare_commit_graft(r); | |
97 | if (r->parsed_objects && r->parsed_objects->grafts_nr) | |
98 | return 0; | |
99 | if (is_repository_shallow(r)) | |
100 | return 0; | |
101 | ||
102 | return 1; | |
103 | } | |
104 | ||
105 | int open_commit_graph(const char *graph_file, int *fd, struct stat *st) | |
106 | { | |
107 | *fd = git_open(graph_file); | |
108 | if (*fd < 0) | |
109 | return 0; | |
110 | if (fstat(*fd, st)) { | |
111 | close(*fd); | |
112 | return 0; | |
113 | } | |
114 | return 1; | |
115 | } | |
116 | ||
117 | struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st) | |
118 | { | |
119 | void *graph_map; | |
120 | size_t graph_size; | |
121 | struct commit_graph *ret; | |
122 | ||
123 | graph_size = xsize_t(st->st_size); | |
124 | ||
125 | if (graph_size < GRAPH_MIN_SIZE) { | |
126 | close(fd); | |
127 | error(_("commit-graph file is too small")); | |
128 | return NULL; | |
129 | } | |
130 | graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
131 | ret = parse_commit_graph(graph_map, fd, graph_size); | |
132 | ||
133 | if (!ret) { | |
134 | munmap(graph_map, graph_size); | |
135 | close(fd); | |
136 | } | |
137 | ||
138 | return ret; | |
139 | } | |
140 | ||
141 | static int verify_commit_graph_lite(struct commit_graph *g) | |
142 | { | |
143 | /* | |
144 | * Basic validation shared between parse_commit_graph() | |
145 | * which'll be called every time the graph is used, and the | |
146 | * much more expensive verify_commit_graph() used by | |
147 | * "commit-graph verify". | |
148 | * | |
149 | * There should only be very basic checks here to ensure that | |
150 | * we don't e.g. segfault in fill_commit_in_graph(), but | |
151 | * because this is a very hot codepath nothing that e.g. loops | |
152 | * over g->num_commits, or runs a checksum on the commit-graph | |
153 | * itself. | |
154 | */ | |
155 | if (!g->chunk_oid_fanout) { | |
156 | error("commit-graph is missing the OID Fanout chunk"); | |
157 | return 1; | |
158 | } | |
159 | if (!g->chunk_oid_lookup) { | |
160 | error("commit-graph is missing the OID Lookup chunk"); | |
161 | return 1; | |
162 | } | |
163 | if (!g->chunk_commit_data) { | |
164 | error("commit-graph is missing the Commit Data chunk"); | |
165 | return 1; | |
166 | } | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | struct commit_graph *parse_commit_graph(void *graph_map, int fd, | |
172 | size_t graph_size) | |
173 | { | |
174 | const unsigned char *data, *chunk_lookup; | |
175 | uint32_t i; | |
176 | struct commit_graph *graph; | |
177 | uint64_t last_chunk_offset; | |
178 | uint32_t last_chunk_id; | |
179 | uint32_t graph_signature; | |
180 | unsigned char graph_version, hash_version; | |
181 | ||
182 | if (!graph_map) | |
183 | return NULL; | |
184 | ||
185 | if (graph_size < GRAPH_MIN_SIZE) | |
186 | return NULL; | |
187 | ||
188 | data = (const unsigned char *)graph_map; | |
189 | ||
190 | graph_signature = get_be32(data); | |
191 | if (graph_signature != GRAPH_SIGNATURE) { | |
192 | error(_("commit-graph signature %X does not match signature %X"), | |
193 | graph_signature, GRAPH_SIGNATURE); | |
194 | return NULL; | |
195 | } | |
196 | ||
197 | graph_version = *(unsigned char*)(data + 4); | |
198 | if (graph_version != GRAPH_VERSION) { | |
199 | error(_("commit-graph version %X does not match version %X"), | |
200 | graph_version, GRAPH_VERSION); | |
201 | return NULL; | |
202 | } | |
203 | ||
204 | hash_version = *(unsigned char*)(data + 5); | |
205 | if (hash_version != oid_version()) { | |
206 | error(_("commit-graph hash version %X does not match version %X"), | |
207 | hash_version, oid_version()); | |
208 | return NULL; | |
209 | } | |
210 | ||
211 | graph = alloc_commit_graph(); | |
212 | ||
213 | graph->hash_len = the_hash_algo->rawsz; | |
214 | graph->num_chunks = *(unsigned char*)(data + 6); | |
215 | graph->graph_fd = fd; | |
216 | graph->data = graph_map; | |
217 | graph->data_len = graph_size; | |
218 | ||
219 | last_chunk_id = 0; | |
220 | last_chunk_offset = 8; | |
221 | chunk_lookup = data + 8; | |
222 | for (i = 0; i < graph->num_chunks; i++) { | |
223 | uint32_t chunk_id; | |
224 | uint64_t chunk_offset; | |
225 | int chunk_repeated = 0; | |
226 | ||
227 | if (data + graph_size - chunk_lookup < | |
228 | GRAPH_CHUNKLOOKUP_WIDTH) { | |
229 | error(_("commit-graph chunk lookup table entry missing; file may be incomplete")); | |
230 | free(graph); | |
231 | return NULL; | |
232 | } | |
233 | ||
234 | chunk_id = get_be32(chunk_lookup + 0); | |
235 | chunk_offset = get_be64(chunk_lookup + 4); | |
236 | ||
237 | chunk_lookup += GRAPH_CHUNKLOOKUP_WIDTH; | |
238 | ||
239 | if (chunk_offset > graph_size - the_hash_algo->rawsz) { | |
240 | error(_("commit-graph improper chunk offset %08x%08x"), (uint32_t)(chunk_offset >> 32), | |
241 | (uint32_t)chunk_offset); | |
242 | free(graph); | |
243 | return NULL; | |
244 | } | |
245 | ||
246 | switch (chunk_id) { | |
247 | case GRAPH_CHUNKID_OIDFANOUT: | |
248 | if (graph->chunk_oid_fanout) | |
249 | chunk_repeated = 1; | |
250 | else | |
251 | graph->chunk_oid_fanout = (uint32_t*)(data + chunk_offset); | |
252 | break; | |
253 | ||
254 | case GRAPH_CHUNKID_OIDLOOKUP: | |
255 | if (graph->chunk_oid_lookup) | |
256 | chunk_repeated = 1; | |
257 | else | |
258 | graph->chunk_oid_lookup = data + chunk_offset; | |
259 | break; | |
260 | ||
261 | case GRAPH_CHUNKID_DATA: | |
262 | if (graph->chunk_commit_data) | |
263 | chunk_repeated = 1; | |
264 | else | |
265 | graph->chunk_commit_data = data + chunk_offset; | |
266 | break; | |
267 | ||
268 | case GRAPH_CHUNKID_EXTRAEDGES: | |
269 | if (graph->chunk_extra_edges) | |
270 | chunk_repeated = 1; | |
271 | else | |
272 | graph->chunk_extra_edges = data + chunk_offset; | |
273 | break; | |
274 | ||
275 | case GRAPH_CHUNKID_BASE: | |
276 | if (graph->chunk_base_graphs) | |
277 | chunk_repeated = 1; | |
278 | else | |
279 | graph->chunk_base_graphs = data + chunk_offset; | |
280 | } | |
281 | ||
282 | if (chunk_repeated) { | |
283 | error(_("commit-graph chunk id %08x appears multiple times"), chunk_id); | |
284 | free(graph); | |
285 | return NULL; | |
286 | } | |
287 | ||
288 | if (last_chunk_id == GRAPH_CHUNKID_OIDLOOKUP) | |
289 | { | |
290 | graph->num_commits = (chunk_offset - last_chunk_offset) | |
291 | / graph->hash_len; | |
292 | } | |
293 | ||
294 | last_chunk_id = chunk_id; | |
295 | last_chunk_offset = chunk_offset; | |
296 | } | |
297 | ||
298 | hashcpy(graph->oid.hash, graph->data + graph->data_len - graph->hash_len); | |
299 | ||
300 | if (verify_commit_graph_lite(graph)) { | |
301 | free(graph); | |
302 | return NULL; | |
303 | } | |
304 | ||
305 | return graph; | |
306 | } | |
307 | ||
308 | static struct commit_graph *load_commit_graph_one(const char *graph_file) | |
309 | { | |
310 | ||
311 | struct stat st; | |
312 | int fd; | |
313 | struct commit_graph *g; | |
314 | int open_ok = open_commit_graph(graph_file, &fd, &st); | |
315 | ||
316 | if (!open_ok) | |
317 | return NULL; | |
318 | ||
319 | g = load_commit_graph_one_fd_st(fd, &st); | |
320 | ||
321 | if (g) | |
322 | g->filename = xstrdup(graph_file); | |
323 | ||
324 | return g; | |
325 | } | |
326 | ||
327 | static struct commit_graph *load_commit_graph_v1(struct repository *r, const char *obj_dir) | |
328 | { | |
329 | char *graph_name = get_commit_graph_filename(obj_dir); | |
330 | struct commit_graph *g = load_commit_graph_one(graph_name); | |
331 | free(graph_name); | |
332 | ||
333 | if (g) | |
334 | g->obj_dir = obj_dir; | |
335 | ||
336 | return g; | |
337 | } | |
338 | ||
339 | static int add_graph_to_chain(struct commit_graph *g, | |
340 | struct commit_graph *chain, | |
341 | struct object_id *oids, | |
342 | int n) | |
343 | { | |
344 | struct commit_graph *cur_g = chain; | |
345 | ||
346 | if (n && !g->chunk_base_graphs) { | |
347 | warning(_("commit-graph has no base graphs chunk")); | |
348 | return 0; | |
349 | } | |
350 | ||
351 | while (n) { | |
352 | n--; | |
353 | ||
354 | if (!cur_g || | |
355 | !oideq(&oids[n], &cur_g->oid) || | |
356 | !hasheq(oids[n].hash, g->chunk_base_graphs + g->hash_len * n)) { | |
357 | warning(_("commit-graph chain does not match")); | |
358 | return 0; | |
359 | } | |
360 | ||
361 | cur_g = cur_g->base_graph; | |
362 | } | |
363 | ||
364 | g->base_graph = chain; | |
365 | ||
366 | if (chain) | |
367 | g->num_commits_in_base = chain->num_commits + chain->num_commits_in_base; | |
368 | ||
369 | return 1; | |
370 | } | |
371 | ||
372 | static struct commit_graph *load_commit_graph_chain(struct repository *r, const char *obj_dir) | |
373 | { | |
374 | struct commit_graph *graph_chain = NULL; | |
375 | struct strbuf line = STRBUF_INIT; | |
376 | struct stat st; | |
377 | struct object_id *oids; | |
378 | int i = 0, valid = 1, count; | |
379 | char *chain_name = get_chain_filename(obj_dir); | |
380 | FILE *fp; | |
381 | int stat_res; | |
382 | ||
383 | fp = fopen(chain_name, "r"); | |
384 | stat_res = stat(chain_name, &st); | |
385 | free(chain_name); | |
386 | ||
387 | if (!fp || | |
388 | stat_res || | |
389 | st.st_size <= the_hash_algo->hexsz) | |
390 | return NULL; | |
391 | ||
392 | count = st.st_size / (the_hash_algo->hexsz + 1); | |
393 | oids = xcalloc(count, sizeof(struct object_id)); | |
394 | ||
395 | prepare_alt_odb(r); | |
396 | ||
397 | for (i = 0; i < count; i++) { | |
398 | struct object_directory *odb; | |
399 | ||
400 | if (strbuf_getline_lf(&line, fp) == EOF) | |
401 | break; | |
402 | ||
403 | if (get_oid_hex(line.buf, &oids[i])) { | |
404 | warning(_("invalid commit-graph chain: line '%s' not a hash"), | |
405 | line.buf); | |
406 | valid = 0; | |
407 | break; | |
408 | } | |
409 | ||
410 | valid = 0; | |
411 | for (odb = r->objects->odb; odb; odb = odb->next) { | |
412 | char *graph_name = get_split_graph_filename(odb->path, line.buf); | |
413 | struct commit_graph *g = load_commit_graph_one(graph_name); | |
414 | ||
415 | free(graph_name); | |
416 | ||
417 | if (g) { | |
418 | g->obj_dir = odb->path; | |
419 | ||
420 | if (add_graph_to_chain(g, graph_chain, oids, i)) { | |
421 | graph_chain = g; | |
422 | valid = 1; | |
423 | } | |
424 | ||
425 | break; | |
426 | } | |
427 | } | |
428 | ||
429 | if (!valid) { | |
430 | warning(_("unable to find all commit-graph files")); | |
431 | break; | |
432 | } | |
433 | } | |
434 | ||
435 | free(oids); | |
436 | fclose(fp); | |
437 | strbuf_release(&line); | |
438 | ||
439 | return graph_chain; | |
440 | } | |
441 | ||
442 | struct commit_graph *read_commit_graph_one(struct repository *r, const char *obj_dir) | |
443 | { | |
444 | struct commit_graph *g = load_commit_graph_v1(r, obj_dir); | |
445 | ||
446 | if (!g) | |
447 | g = load_commit_graph_chain(r, obj_dir); | |
448 | ||
449 | return g; | |
450 | } | |
451 | ||
452 | static void prepare_commit_graph_one(struct repository *r, const char *obj_dir) | |
453 | { | |
454 | ||
455 | if (r->objects->commit_graph) | |
456 | return; | |
457 | ||
458 | r->objects->commit_graph = read_commit_graph_one(r, obj_dir); | |
459 | } | |
460 | ||
461 | /* | |
462 | * Return 1 if commit_graph is non-NULL, and 0 otherwise. | |
463 | * | |
464 | * On the first invocation, this function attemps to load the commit | |
465 | * graph if the_repository is configured to have one. | |
466 | */ | |
467 | static int prepare_commit_graph(struct repository *r) | |
468 | { | |
469 | struct object_directory *odb; | |
470 | ||
471 | /* | |
472 | * This must come before the "already attempted?" check below, because | |
473 | * we want to disable even an already-loaded graph file. | |
474 | */ | |
475 | if (r->commit_graph_disabled) | |
476 | return 0; | |
477 | ||
478 | if (r->objects->commit_graph_attempted) | |
479 | return !!r->objects->commit_graph; | |
480 | r->objects->commit_graph_attempted = 1; | |
481 | ||
482 | if (git_env_bool(GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD, 0)) | |
483 | die("dying as requested by the '%s' variable on commit-graph load!", | |
484 | GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD); | |
485 | ||
486 | prepare_repo_settings(r); | |
487 | ||
488 | if (!git_env_bool(GIT_TEST_COMMIT_GRAPH, 0) && | |
489 | r->settings.core_commit_graph != 1) | |
490 | /* | |
491 | * This repository is not configured to use commit graphs, so | |
492 | * do not load one. (But report commit_graph_attempted anyway | |
493 | * so that commit graph loading is not attempted again for this | |
494 | * repository.) | |
495 | */ | |
496 | return 0; | |
497 | ||
498 | if (!commit_graph_compatible(r)) | |
499 | return 0; | |
500 | ||
501 | prepare_alt_odb(r); | |
502 | for (odb = r->objects->odb; | |
503 | !r->objects->commit_graph && odb; | |
504 | odb = odb->next) | |
505 | prepare_commit_graph_one(r, odb->path); | |
506 | return !!r->objects->commit_graph; | |
507 | } | |
508 | ||
509 | int generation_numbers_enabled(struct repository *r) | |
510 | { | |
511 | uint32_t first_generation; | |
512 | struct commit_graph *g; | |
513 | if (!prepare_commit_graph(r)) | |
514 | return 0; | |
515 | ||
516 | g = r->objects->commit_graph; | |
517 | ||
518 | if (!g->num_commits) | |
519 | return 0; | |
520 | ||
521 | first_generation = get_be32(g->chunk_commit_data + | |
522 | g->hash_len + 8) >> 2; | |
523 | ||
524 | return !!first_generation; | |
525 | } | |
526 | ||
527 | static void close_commit_graph_one(struct commit_graph *g) | |
528 | { | |
529 | if (!g) | |
530 | return; | |
531 | ||
532 | close_commit_graph_one(g->base_graph); | |
533 | free_commit_graph(g); | |
534 | } | |
535 | ||
536 | void close_commit_graph(struct raw_object_store *o) | |
537 | { | |
538 | close_commit_graph_one(o->commit_graph); | |
539 | o->commit_graph = NULL; | |
540 | } | |
541 | ||
542 | static int bsearch_graph(struct commit_graph *g, struct object_id *oid, uint32_t *pos) | |
543 | { | |
544 | return bsearch_hash(oid->hash, g->chunk_oid_fanout, | |
545 | g->chunk_oid_lookup, g->hash_len, pos); | |
546 | } | |
547 | ||
548 | static void load_oid_from_graph(struct commit_graph *g, | |
549 | uint32_t pos, | |
550 | struct object_id *oid) | |
551 | { | |
552 | uint32_t lex_index; | |
553 | ||
554 | while (g && pos < g->num_commits_in_base) | |
555 | g = g->base_graph; | |
556 | ||
557 | if (!g) | |
558 | BUG("NULL commit-graph"); | |
559 | ||
560 | if (pos >= g->num_commits + g->num_commits_in_base) | |
561 | die(_("invalid commit position. commit-graph is likely corrupt")); | |
562 | ||
563 | lex_index = pos - g->num_commits_in_base; | |
564 | ||
565 | hashcpy(oid->hash, g->chunk_oid_lookup + g->hash_len * lex_index); | |
566 | } | |
567 | ||
568 | static struct commit_list **insert_parent_or_die(struct repository *r, | |
569 | struct commit_graph *g, | |
570 | uint32_t pos, | |
571 | struct commit_list **pptr) | |
572 | { | |
573 | struct commit *c; | |
574 | struct object_id oid; | |
575 | ||
576 | if (pos >= g->num_commits + g->num_commits_in_base) | |
577 | die("invalid parent position %"PRIu32, pos); | |
578 | ||
579 | load_oid_from_graph(g, pos, &oid); | |
580 | c = lookup_commit(r, &oid); | |
581 | if (!c) | |
582 | die(_("could not find commit %s"), oid_to_hex(&oid)); | |
583 | c->graph_pos = pos; | |
584 | return &commit_list_insert(c, pptr)->next; | |
585 | } | |
586 | ||
587 | static void fill_commit_graph_info(struct commit *item, struct commit_graph *g, uint32_t pos) | |
588 | { | |
589 | const unsigned char *commit_data; | |
590 | uint32_t lex_index; | |
591 | ||
592 | while (pos < g->num_commits_in_base) | |
593 | g = g->base_graph; | |
594 | ||
595 | lex_index = pos - g->num_commits_in_base; | |
596 | commit_data = g->chunk_commit_data + GRAPH_DATA_WIDTH * lex_index; | |
597 | item->graph_pos = pos; | |
598 | item->generation = get_be32(commit_data + g->hash_len + 8) >> 2; | |
599 | } | |
600 | ||
601 | static inline void set_commit_tree(struct commit *c, struct tree *t) | |
602 | { | |
603 | c->maybe_tree = t; | |
604 | } | |
605 | ||
606 | static int fill_commit_in_graph(struct repository *r, | |
607 | struct commit *item, | |
608 | struct commit_graph *g, uint32_t pos) | |
609 | { | |
610 | uint32_t edge_value; | |
611 | uint32_t *parent_data_ptr; | |
612 | uint64_t date_low, date_high; | |
613 | struct commit_list **pptr; | |
614 | const unsigned char *commit_data; | |
615 | uint32_t lex_index; | |
616 | ||
617 | while (pos < g->num_commits_in_base) | |
618 | g = g->base_graph; | |
619 | ||
620 | if (pos >= g->num_commits + g->num_commits_in_base) | |
621 | die(_("invalid commit position. commit-graph is likely corrupt")); | |
622 | ||
623 | /* | |
624 | * Store the "full" position, but then use the | |
625 | * "local" position for the rest of the calculation. | |
626 | */ | |
627 | item->graph_pos = pos; | |
628 | lex_index = pos - g->num_commits_in_base; | |
629 | ||
630 | commit_data = g->chunk_commit_data + (g->hash_len + 16) * lex_index; | |
631 | ||
632 | item->object.parsed = 1; | |
633 | ||
634 | set_commit_tree(item, NULL); | |
635 | ||
636 | date_high = get_be32(commit_data + g->hash_len + 8) & 0x3; | |
637 | date_low = get_be32(commit_data + g->hash_len + 12); | |
638 | item->date = (timestamp_t)((date_high << 32) | date_low); | |
639 | ||
640 | item->generation = get_be32(commit_data + g->hash_len + 8) >> 2; | |
641 | ||
642 | pptr = &item->parents; | |
643 | ||
644 | edge_value = get_be32(commit_data + g->hash_len); | |
645 | if (edge_value == GRAPH_PARENT_NONE) | |
646 | return 1; | |
647 | pptr = insert_parent_or_die(r, g, edge_value, pptr); | |
648 | ||
649 | edge_value = get_be32(commit_data + g->hash_len + 4); | |
650 | if (edge_value == GRAPH_PARENT_NONE) | |
651 | return 1; | |
652 | if (!(edge_value & GRAPH_EXTRA_EDGES_NEEDED)) { | |
653 | pptr = insert_parent_or_die(r, g, edge_value, pptr); | |
654 | return 1; | |
655 | } | |
656 | ||
657 | parent_data_ptr = (uint32_t*)(g->chunk_extra_edges + | |
658 | 4 * (uint64_t)(edge_value & GRAPH_EDGE_LAST_MASK)); | |
659 | do { | |
660 | edge_value = get_be32(parent_data_ptr); | |
661 | pptr = insert_parent_or_die(r, g, | |
662 | edge_value & GRAPH_EDGE_LAST_MASK, | |
663 | pptr); | |
664 | parent_data_ptr++; | |
665 | } while (!(edge_value & GRAPH_LAST_EDGE)); | |
666 | ||
667 | return 1; | |
668 | } | |
669 | ||
670 | static int find_commit_in_graph(struct commit *item, struct commit_graph *g, uint32_t *pos) | |
671 | { | |
672 | if (item->graph_pos != COMMIT_NOT_FROM_GRAPH) { | |
673 | *pos = item->graph_pos; | |
674 | return 1; | |
675 | } else { | |
676 | struct commit_graph *cur_g = g; | |
677 | uint32_t lex_index; | |
678 | ||
679 | while (cur_g && !bsearch_graph(cur_g, &(item->object.oid), &lex_index)) | |
680 | cur_g = cur_g->base_graph; | |
681 | ||
682 | if (cur_g) { | |
683 | *pos = lex_index + cur_g->num_commits_in_base; | |
684 | return 1; | |
685 | } | |
686 | ||
687 | return 0; | |
688 | } | |
689 | } | |
690 | ||
691 | static int parse_commit_in_graph_one(struct repository *r, | |
692 | struct commit_graph *g, | |
693 | struct commit *item) | |
694 | { | |
695 | uint32_t pos; | |
696 | ||
697 | if (item->object.parsed) | |
698 | return 1; | |
699 | ||
700 | if (find_commit_in_graph(item, g, &pos)) | |
701 | return fill_commit_in_graph(r, item, g, pos); | |
702 | ||
703 | return 0; | |
704 | } | |
705 | ||
706 | int parse_commit_in_graph(struct repository *r, struct commit *item) | |
707 | { | |
708 | if (!prepare_commit_graph(r)) | |
709 | return 0; | |
710 | return parse_commit_in_graph_one(r, r->objects->commit_graph, item); | |
711 | } | |
712 | ||
713 | void load_commit_graph_info(struct repository *r, struct commit *item) | |
714 | { | |
715 | uint32_t pos; | |
716 | if (!prepare_commit_graph(r)) | |
717 | return; | |
718 | if (find_commit_in_graph(item, r->objects->commit_graph, &pos)) | |
719 | fill_commit_graph_info(item, r->objects->commit_graph, pos); | |
720 | } | |
721 | ||
722 | static struct tree *load_tree_for_commit(struct repository *r, | |
723 | struct commit_graph *g, | |
724 | struct commit *c) | |
725 | { | |
726 | struct object_id oid; | |
727 | const unsigned char *commit_data; | |
728 | ||
729 | while (c->graph_pos < g->num_commits_in_base) | |
730 | g = g->base_graph; | |
731 | ||
732 | commit_data = g->chunk_commit_data + | |
733 | GRAPH_DATA_WIDTH * (c->graph_pos - g->num_commits_in_base); | |
734 | ||
735 | hashcpy(oid.hash, commit_data); | |
736 | set_commit_tree(c, lookup_tree(r, &oid)); | |
737 | ||
738 | return c->maybe_tree; | |
739 | } | |
740 | ||
741 | static struct tree *get_commit_tree_in_graph_one(struct repository *r, | |
742 | struct commit_graph *g, | |
743 | const struct commit *c) | |
744 | { | |
745 | if (c->maybe_tree) | |
746 | return c->maybe_tree; | |
747 | if (c->graph_pos == COMMIT_NOT_FROM_GRAPH) | |
748 | BUG("get_commit_tree_in_graph_one called from non-commit-graph commit"); | |
749 | ||
750 | return load_tree_for_commit(r, g, (struct commit *)c); | |
751 | } | |
752 | ||
753 | struct tree *get_commit_tree_in_graph(struct repository *r, const struct commit *c) | |
754 | { | |
755 | return get_commit_tree_in_graph_one(r, r->objects->commit_graph, c); | |
756 | } | |
757 | ||
758 | struct packed_commit_list { | |
759 | struct commit **list; | |
760 | int nr; | |
761 | int alloc; | |
762 | }; | |
763 | ||
764 | struct packed_oid_list { | |
765 | struct object_id *list; | |
766 | int nr; | |
767 | int alloc; | |
768 | }; | |
769 | ||
770 | struct write_commit_graph_context { | |
771 | struct repository *r; | |
772 | char *obj_dir; | |
773 | char *graph_name; | |
774 | struct packed_oid_list oids; | |
775 | struct packed_commit_list commits; | |
776 | int num_extra_edges; | |
777 | unsigned long approx_nr_objects; | |
778 | struct progress *progress; | |
779 | int progress_done; | |
780 | uint64_t progress_cnt; | |
781 | ||
782 | char *base_graph_name; | |
783 | int num_commit_graphs_before; | |
784 | int num_commit_graphs_after; | |
785 | char **commit_graph_filenames_before; | |
786 | char **commit_graph_filenames_after; | |
787 | char **commit_graph_hash_after; | |
788 | uint32_t new_num_commits_in_base; | |
789 | struct commit_graph *new_base_graph; | |
790 | ||
791 | unsigned append:1, | |
792 | report_progress:1, | |
793 | split:1, | |
794 | check_oids:1; | |
795 | ||
796 | const struct split_commit_graph_opts *split_opts; | |
797 | }; | |
798 | ||
799 | static void write_graph_chunk_fanout(struct hashfile *f, | |
800 | struct write_commit_graph_context *ctx) | |
801 | { | |
802 | int i, count = 0; | |
803 | struct commit **list = ctx->commits.list; | |
804 | ||
805 | /* | |
806 | * Write the first-level table (the list is sorted, | |
807 | * but we use a 256-entry lookup to be able to avoid | |
808 | * having to do eight extra binary search iterations). | |
809 | */ | |
810 | for (i = 0; i < 256; i++) { | |
811 | while (count < ctx->commits.nr) { | |
812 | if ((*list)->object.oid.hash[0] != i) | |
813 | break; | |
814 | display_progress(ctx->progress, ++ctx->progress_cnt); | |
815 | count++; | |
816 | list++; | |
817 | } | |
818 | ||
819 | hashwrite_be32(f, count); | |
820 | } | |
821 | } | |
822 | ||
823 | static void write_graph_chunk_oids(struct hashfile *f, int hash_len, | |
824 | struct write_commit_graph_context *ctx) | |
825 | { | |
826 | struct commit **list = ctx->commits.list; | |
827 | int count; | |
828 | for (count = 0; count < ctx->commits.nr; count++, list++) { | |
829 | display_progress(ctx->progress, ++ctx->progress_cnt); | |
830 | hashwrite(f, (*list)->object.oid.hash, (int)hash_len); | |
831 | } | |
832 | } | |
833 | ||
834 | static const unsigned char *commit_to_sha1(size_t index, void *table) | |
835 | { | |
836 | struct commit **commits = table; | |
837 | return commits[index]->object.oid.hash; | |
838 | } | |
839 | ||
840 | static void write_graph_chunk_data(struct hashfile *f, int hash_len, | |
841 | struct write_commit_graph_context *ctx) | |
842 | { | |
843 | struct commit **list = ctx->commits.list; | |
844 | struct commit **last = ctx->commits.list + ctx->commits.nr; | |
845 | uint32_t num_extra_edges = 0; | |
846 | ||
847 | while (list < last) { | |
848 | struct commit_list *parent; | |
849 | struct object_id *tree; | |
850 | int edge_value; | |
851 | uint32_t packedDate[2]; | |
852 | display_progress(ctx->progress, ++ctx->progress_cnt); | |
853 | ||
854 | if (parse_commit_no_graph(*list)) | |
855 | die(_("unable to parse commit %s"), | |
856 | oid_to_hex(&(*list)->object.oid)); | |
857 | tree = get_commit_tree_oid(*list); | |
858 | if (!tree) | |
859 | die(_("unable to get tree for %s"), | |
860 | oid_to_hex(&(*list)->object.oid)); | |
861 | hashwrite(f, tree->hash, hash_len); | |
862 | ||
863 | parent = (*list)->parents; | |
864 | ||
865 | if (!parent) | |
866 | edge_value = GRAPH_PARENT_NONE; | |
867 | else { | |
868 | edge_value = sha1_pos(parent->item->object.oid.hash, | |
869 | ctx->commits.list, | |
870 | ctx->commits.nr, | |
871 | commit_to_sha1); | |
872 | ||
873 | if (edge_value >= 0) | |
874 | edge_value += ctx->new_num_commits_in_base; | |
875 | else { | |
876 | uint32_t pos; | |
877 | if (find_commit_in_graph(parent->item, | |
878 | ctx->new_base_graph, | |
879 | &pos)) | |
880 | edge_value = pos; | |
881 | } | |
882 | ||
883 | if (edge_value < 0) | |
884 | BUG("missing parent %s for commit %s", | |
885 | oid_to_hex(&parent->item->object.oid), | |
886 | oid_to_hex(&(*list)->object.oid)); | |
887 | } | |
888 | ||
889 | hashwrite_be32(f, edge_value); | |
890 | ||
891 | if (parent) | |
892 | parent = parent->next; | |
893 | ||
894 | if (!parent) | |
895 | edge_value = GRAPH_PARENT_NONE; | |
896 | else if (parent->next) | |
897 | edge_value = GRAPH_EXTRA_EDGES_NEEDED | num_extra_edges; | |
898 | else { | |
899 | edge_value = sha1_pos(parent->item->object.oid.hash, | |
900 | ctx->commits.list, | |
901 | ctx->commits.nr, | |
902 | commit_to_sha1); | |
903 | ||
904 | if (edge_value >= 0) | |
905 | edge_value += ctx->new_num_commits_in_base; | |
906 | else { | |
907 | uint32_t pos; | |
908 | if (find_commit_in_graph(parent->item, | |
909 | ctx->new_base_graph, | |
910 | &pos)) | |
911 | edge_value = pos; | |
912 | } | |
913 | ||
914 | if (edge_value < 0) | |
915 | BUG("missing parent %s for commit %s", | |
916 | oid_to_hex(&parent->item->object.oid), | |
917 | oid_to_hex(&(*list)->object.oid)); | |
918 | } | |
919 | ||
920 | hashwrite_be32(f, edge_value); | |
921 | ||
922 | if (edge_value & GRAPH_EXTRA_EDGES_NEEDED) { | |
923 | do { | |
924 | num_extra_edges++; | |
925 | parent = parent->next; | |
926 | } while (parent); | |
927 | } | |
928 | ||
929 | if (sizeof((*list)->date) > 4) | |
930 | packedDate[0] = htonl(((*list)->date >> 32) & 0x3); | |
931 | else | |
932 | packedDate[0] = 0; | |
933 | ||
934 | packedDate[0] |= htonl((*list)->generation << 2); | |
935 | ||
936 | packedDate[1] = htonl((*list)->date); | |
937 | hashwrite(f, packedDate, 8); | |
938 | ||
939 | list++; | |
940 | } | |
941 | } | |
942 | ||
943 | static void write_graph_chunk_extra_edges(struct hashfile *f, | |
944 | struct write_commit_graph_context *ctx) | |
945 | { | |
946 | struct commit **list = ctx->commits.list; | |
947 | struct commit **last = ctx->commits.list + ctx->commits.nr; | |
948 | struct commit_list *parent; | |
949 | ||
950 | while (list < last) { | |
951 | int num_parents = 0; | |
952 | ||
953 | display_progress(ctx->progress, ++ctx->progress_cnt); | |
954 | ||
955 | for (parent = (*list)->parents; num_parents < 3 && parent; | |
956 | parent = parent->next) | |
957 | num_parents++; | |
958 | ||
959 | if (num_parents <= 2) { | |
960 | list++; | |
961 | continue; | |
962 | } | |
963 | ||
964 | /* Since num_parents > 2, this initializer is safe. */ | |
965 | for (parent = (*list)->parents->next; parent; parent = parent->next) { | |
966 | int edge_value = sha1_pos(parent->item->object.oid.hash, | |
967 | ctx->commits.list, | |
968 | ctx->commits.nr, | |
969 | commit_to_sha1); | |
970 | ||
971 | if (edge_value >= 0) | |
972 | edge_value += ctx->new_num_commits_in_base; | |
973 | else { | |
974 | uint32_t pos; | |
975 | if (find_commit_in_graph(parent->item, | |
976 | ctx->new_base_graph, | |
977 | &pos)) | |
978 | edge_value = pos; | |
979 | } | |
980 | ||
981 | if (edge_value < 0) | |
982 | BUG("missing parent %s for commit %s", | |
983 | oid_to_hex(&parent->item->object.oid), | |
984 | oid_to_hex(&(*list)->object.oid)); | |
985 | else if (!parent->next) | |
986 | edge_value |= GRAPH_LAST_EDGE; | |
987 | ||
988 | hashwrite_be32(f, edge_value); | |
989 | } | |
990 | ||
991 | list++; | |
992 | } | |
993 | } | |
994 | ||
995 | static int oid_compare(const void *_a, const void *_b) | |
996 | { | |
997 | const struct object_id *a = (const struct object_id *)_a; | |
998 | const struct object_id *b = (const struct object_id *)_b; | |
999 | return oidcmp(a, b); | |
1000 | } | |
1001 | ||
1002 | static int add_packed_commits(const struct object_id *oid, | |
1003 | struct packed_git *pack, | |
1004 | uint32_t pos, | |
1005 | void *data) | |
1006 | { | |
1007 | struct write_commit_graph_context *ctx = (struct write_commit_graph_context*)data; | |
1008 | enum object_type type; | |
1009 | off_t offset = nth_packed_object_offset(pack, pos); | |
1010 | struct object_info oi = OBJECT_INFO_INIT; | |
1011 | ||
1012 | if (ctx->progress) | |
1013 | display_progress(ctx->progress, ++ctx->progress_done); | |
1014 | ||
1015 | oi.typep = &type; | |
1016 | if (packed_object_info(ctx->r, pack, offset, &oi) < 0) | |
1017 | die(_("unable to get type of object %s"), oid_to_hex(oid)); | |
1018 | ||
1019 | if (type != OBJ_COMMIT) | |
1020 | return 0; | |
1021 | ||
1022 | ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc); | |
1023 | oidcpy(&(ctx->oids.list[ctx->oids.nr]), oid); | |
1024 | ctx->oids.nr++; | |
1025 | ||
1026 | return 0; | |
1027 | } | |
1028 | ||
1029 | static void add_missing_parents(struct write_commit_graph_context *ctx, struct commit *commit) | |
1030 | { | |
1031 | struct commit_list *parent; | |
1032 | for (parent = commit->parents; parent; parent = parent->next) { | |
1033 | if (!(parent->item->object.flags & UNINTERESTING)) { | |
1034 | ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc); | |
1035 | oidcpy(&ctx->oids.list[ctx->oids.nr], &(parent->item->object.oid)); | |
1036 | ctx->oids.nr++; | |
1037 | parent->item->object.flags |= UNINTERESTING; | |
1038 | } | |
1039 | } | |
1040 | } | |
1041 | ||
1042 | static void close_reachable(struct write_commit_graph_context *ctx) | |
1043 | { | |
1044 | int i; | |
1045 | struct commit *commit; | |
1046 | ||
1047 | if (ctx->report_progress) | |
1048 | ctx->progress = start_delayed_progress( | |
1049 | _("Loading known commits in commit graph"), | |
1050 | ctx->oids.nr); | |
1051 | for (i = 0; i < ctx->oids.nr; i++) { | |
1052 | display_progress(ctx->progress, i + 1); | |
1053 | commit = lookup_commit(ctx->r, &ctx->oids.list[i]); | |
1054 | if (commit) | |
1055 | commit->object.flags |= UNINTERESTING; | |
1056 | } | |
1057 | stop_progress(&ctx->progress); | |
1058 | ||
1059 | /* | |
1060 | * As this loop runs, ctx->oids.nr may grow, but not more | |
1061 | * than the number of missing commits in the reachable | |
1062 | * closure. | |
1063 | */ | |
1064 | if (ctx->report_progress) | |
1065 | ctx->progress = start_delayed_progress( | |
1066 | _("Expanding reachable commits in commit graph"), | |
1067 | 0); | |
1068 | for (i = 0; i < ctx->oids.nr; i++) { | |
1069 | display_progress(ctx->progress, i + 1); | |
1070 | commit = lookup_commit(ctx->r, &ctx->oids.list[i]); | |
1071 | ||
1072 | if (!commit) | |
1073 | continue; | |
1074 | if (ctx->split) { | |
1075 | if (!parse_commit(commit) && | |
1076 | commit->graph_pos == COMMIT_NOT_FROM_GRAPH) | |
1077 | add_missing_parents(ctx, commit); | |
1078 | } else if (!parse_commit_no_graph(commit)) | |
1079 | add_missing_parents(ctx, commit); | |
1080 | } | |
1081 | stop_progress(&ctx->progress); | |
1082 | ||
1083 | if (ctx->report_progress) | |
1084 | ctx->progress = start_delayed_progress( | |
1085 | _("Clearing commit marks in commit graph"), | |
1086 | ctx->oids.nr); | |
1087 | for (i = 0; i < ctx->oids.nr; i++) { | |
1088 | display_progress(ctx->progress, i + 1); | |
1089 | commit = lookup_commit(ctx->r, &ctx->oids.list[i]); | |
1090 | ||
1091 | if (commit) | |
1092 | commit->object.flags &= ~UNINTERESTING; | |
1093 | } | |
1094 | stop_progress(&ctx->progress); | |
1095 | } | |
1096 | ||
1097 | static void compute_generation_numbers(struct write_commit_graph_context *ctx) | |
1098 | { | |
1099 | int i; | |
1100 | struct commit_list *list = NULL; | |
1101 | ||
1102 | if (ctx->report_progress) | |
1103 | ctx->progress = start_progress( | |
1104 | _("Computing commit graph generation numbers"), | |
1105 | ctx->commits.nr); | |
1106 | for (i = 0; i < ctx->commits.nr; i++) { | |
1107 | display_progress(ctx->progress, i + 1); | |
1108 | if (ctx->commits.list[i]->generation != GENERATION_NUMBER_INFINITY && | |
1109 | ctx->commits.list[i]->generation != GENERATION_NUMBER_ZERO) | |
1110 | continue; | |
1111 | ||
1112 | commit_list_insert(ctx->commits.list[i], &list); | |
1113 | while (list) { | |
1114 | struct commit *current = list->item; | |
1115 | struct commit_list *parent; | |
1116 | int all_parents_computed = 1; | |
1117 | uint32_t max_generation = 0; | |
1118 | ||
1119 | for (parent = current->parents; parent; parent = parent->next) { | |
1120 | if (parent->item->generation == GENERATION_NUMBER_INFINITY || | |
1121 | parent->item->generation == GENERATION_NUMBER_ZERO) { | |
1122 | all_parents_computed = 0; | |
1123 | commit_list_insert(parent->item, &list); | |
1124 | break; | |
1125 | } else if (parent->item->generation > max_generation) { | |
1126 | max_generation = parent->item->generation; | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | if (all_parents_computed) { | |
1131 | current->generation = max_generation + 1; | |
1132 | pop_commit(&list); | |
1133 | ||
1134 | if (current->generation > GENERATION_NUMBER_MAX) | |
1135 | current->generation = GENERATION_NUMBER_MAX; | |
1136 | } | |
1137 | } | |
1138 | } | |
1139 | stop_progress(&ctx->progress); | |
1140 | } | |
1141 | ||
1142 | static int add_ref_to_list(const char *refname, | |
1143 | const struct object_id *oid, | |
1144 | int flags, void *cb_data) | |
1145 | { | |
1146 | struct string_list *list = (struct string_list *)cb_data; | |
1147 | ||
1148 | string_list_append(list, oid_to_hex(oid)); | |
1149 | return 0; | |
1150 | } | |
1151 | ||
1152 | int write_commit_graph_reachable(const char *obj_dir, | |
1153 | enum commit_graph_write_flags flags, | |
1154 | const struct split_commit_graph_opts *split_opts) | |
1155 | { | |
1156 | struct string_list list = STRING_LIST_INIT_DUP; | |
1157 | int result; | |
1158 | ||
1159 | for_each_ref(add_ref_to_list, &list); | |
1160 | result = write_commit_graph(obj_dir, NULL, &list, | |
1161 | flags, split_opts); | |
1162 | ||
1163 | string_list_clear(&list, 0); | |
1164 | return result; | |
1165 | } | |
1166 | ||
1167 | static int fill_oids_from_packs(struct write_commit_graph_context *ctx, | |
1168 | struct string_list *pack_indexes) | |
1169 | { | |
1170 | uint32_t i; | |
1171 | struct strbuf progress_title = STRBUF_INIT; | |
1172 | struct strbuf packname = STRBUF_INIT; | |
1173 | int dirlen; | |
1174 | ||
1175 | strbuf_addf(&packname, "%s/pack/", ctx->obj_dir); | |
1176 | dirlen = packname.len; | |
1177 | if (ctx->report_progress) { | |
1178 | strbuf_addf(&progress_title, | |
1179 | Q_("Finding commits for commit graph in %d pack", | |
1180 | "Finding commits for commit graph in %d packs", | |
1181 | pack_indexes->nr), | |
1182 | pack_indexes->nr); | |
1183 | ctx->progress = start_delayed_progress(progress_title.buf, 0); | |
1184 | ctx->progress_done = 0; | |
1185 | } | |
1186 | for (i = 0; i < pack_indexes->nr; i++) { | |
1187 | struct packed_git *p; | |
1188 | strbuf_setlen(&packname, dirlen); | |
1189 | strbuf_addstr(&packname, pack_indexes->items[i].string); | |
1190 | p = add_packed_git(packname.buf, packname.len, 1); | |
1191 | if (!p) { | |
1192 | error(_("error adding pack %s"), packname.buf); | |
1193 | return -1; | |
1194 | } | |
1195 | if (open_pack_index(p)) { | |
1196 | error(_("error opening index for %s"), packname.buf); | |
1197 | return -1; | |
1198 | } | |
1199 | for_each_object_in_pack(p, add_packed_commits, ctx, | |
1200 | FOR_EACH_OBJECT_PACK_ORDER); | |
1201 | close_pack(p); | |
1202 | free(p); | |
1203 | } | |
1204 | ||
1205 | stop_progress(&ctx->progress); | |
1206 | strbuf_release(&progress_title); | |
1207 | strbuf_release(&packname); | |
1208 | ||
1209 | return 0; | |
1210 | } | |
1211 | ||
1212 | static int fill_oids_from_commit_hex(struct write_commit_graph_context *ctx, | |
1213 | struct string_list *commit_hex) | |
1214 | { | |
1215 | uint32_t i; | |
1216 | struct strbuf progress_title = STRBUF_INIT; | |
1217 | ||
1218 | if (ctx->report_progress) { | |
1219 | strbuf_addf(&progress_title, | |
1220 | Q_("Finding commits for commit graph from %d ref", | |
1221 | "Finding commits for commit graph from %d refs", | |
1222 | commit_hex->nr), | |
1223 | commit_hex->nr); | |
1224 | ctx->progress = start_delayed_progress( | |
1225 | progress_title.buf, | |
1226 | commit_hex->nr); | |
1227 | } | |
1228 | for (i = 0; i < commit_hex->nr; i++) { | |
1229 | const char *end; | |
1230 | struct object_id oid; | |
1231 | struct commit *result; | |
1232 | ||
1233 | display_progress(ctx->progress, i + 1); | |
1234 | if (!parse_oid_hex(commit_hex->items[i].string, &oid, &end) && | |
1235 | (result = lookup_commit_reference_gently(ctx->r, &oid, 1))) { | |
1236 | ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc); | |
1237 | oidcpy(&ctx->oids.list[ctx->oids.nr], &(result->object.oid)); | |
1238 | ctx->oids.nr++; | |
1239 | } else if (ctx->check_oids) { | |
1240 | error(_("invalid commit object id: %s"), | |
1241 | commit_hex->items[i].string); | |
1242 | return -1; | |
1243 | } | |
1244 | } | |
1245 | stop_progress(&ctx->progress); | |
1246 | strbuf_release(&progress_title); | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | static void fill_oids_from_all_packs(struct write_commit_graph_context *ctx) | |
1252 | { | |
1253 | if (ctx->report_progress) | |
1254 | ctx->progress = start_delayed_progress( | |
1255 | _("Finding commits for commit graph among packed objects"), | |
1256 | ctx->approx_nr_objects); | |
1257 | for_each_packed_object(add_packed_commits, ctx, | |
1258 | FOR_EACH_OBJECT_PACK_ORDER); | |
1259 | if (ctx->progress_done < ctx->approx_nr_objects) | |
1260 | display_progress(ctx->progress, ctx->approx_nr_objects); | |
1261 | stop_progress(&ctx->progress); | |
1262 | } | |
1263 | ||
1264 | static uint32_t count_distinct_commits(struct write_commit_graph_context *ctx) | |
1265 | { | |
1266 | uint32_t i, count_distinct = 1; | |
1267 | ||
1268 | if (ctx->report_progress) | |
1269 | ctx->progress = start_delayed_progress( | |
1270 | _("Counting distinct commits in commit graph"), | |
1271 | ctx->oids.nr); | |
1272 | display_progress(ctx->progress, 0); /* TODO: Measure QSORT() progress */ | |
1273 | QSORT(ctx->oids.list, ctx->oids.nr, oid_compare); | |
1274 | ||
1275 | for (i = 1; i < ctx->oids.nr; i++) { | |
1276 | display_progress(ctx->progress, i + 1); | |
1277 | if (!oideq(&ctx->oids.list[i - 1], &ctx->oids.list[i])) { | |
1278 | if (ctx->split) { | |
1279 | struct commit *c = lookup_commit(ctx->r, &ctx->oids.list[i]); | |
1280 | ||
1281 | if (!c || c->graph_pos != COMMIT_NOT_FROM_GRAPH) | |
1282 | continue; | |
1283 | } | |
1284 | ||
1285 | count_distinct++; | |
1286 | } | |
1287 | } | |
1288 | stop_progress(&ctx->progress); | |
1289 | ||
1290 | return count_distinct; | |
1291 | } | |
1292 | ||
1293 | static void copy_oids_to_commits(struct write_commit_graph_context *ctx) | |
1294 | { | |
1295 | uint32_t i; | |
1296 | ||
1297 | ctx->num_extra_edges = 0; | |
1298 | if (ctx->report_progress) | |
1299 | ctx->progress = start_delayed_progress( | |
1300 | _("Finding extra edges in commit graph"), | |
1301 | ctx->oids.nr); | |
1302 | for (i = 0; i < ctx->oids.nr; i++) { | |
1303 | unsigned int num_parents; | |
1304 | ||
1305 | display_progress(ctx->progress, i + 1); | |
1306 | if (i > 0 && oideq(&ctx->oids.list[i - 1], &ctx->oids.list[i])) | |
1307 | continue; | |
1308 | ||
1309 | ALLOC_GROW(ctx->commits.list, ctx->commits.nr + 1, ctx->commits.alloc); | |
1310 | ctx->commits.list[ctx->commits.nr] = lookup_commit(ctx->r, &ctx->oids.list[i]); | |
1311 | ||
1312 | if (ctx->split && | |
1313 | ctx->commits.list[ctx->commits.nr]->graph_pos != COMMIT_NOT_FROM_GRAPH) | |
1314 | continue; | |
1315 | ||
1316 | parse_commit_no_graph(ctx->commits.list[ctx->commits.nr]); | |
1317 | ||
1318 | num_parents = commit_list_count(ctx->commits.list[ctx->commits.nr]->parents); | |
1319 | if (num_parents > 2) | |
1320 | ctx->num_extra_edges += num_parents - 1; | |
1321 | ||
1322 | ctx->commits.nr++; | |
1323 | } | |
1324 | stop_progress(&ctx->progress); | |
1325 | } | |
1326 | ||
1327 | static int write_graph_chunk_base_1(struct hashfile *f, | |
1328 | struct commit_graph *g) | |
1329 | { | |
1330 | int num = 0; | |
1331 | ||
1332 | if (!g) | |
1333 | return 0; | |
1334 | ||
1335 | num = write_graph_chunk_base_1(f, g->base_graph); | |
1336 | hashwrite(f, g->oid.hash, the_hash_algo->rawsz); | |
1337 | return num + 1; | |
1338 | } | |
1339 | ||
1340 | static int write_graph_chunk_base(struct hashfile *f, | |
1341 | struct write_commit_graph_context *ctx) | |
1342 | { | |
1343 | int num = write_graph_chunk_base_1(f, ctx->new_base_graph); | |
1344 | ||
1345 | if (num != ctx->num_commit_graphs_after - 1) { | |
1346 | error(_("failed to write correct number of base graph ids")); | |
1347 | return -1; | |
1348 | } | |
1349 | ||
1350 | return 0; | |
1351 | } | |
1352 | ||
1353 | static int write_commit_graph_file(struct write_commit_graph_context *ctx) | |
1354 | { | |
1355 | uint32_t i; | |
1356 | int fd; | |
1357 | struct hashfile *f; | |
1358 | struct lock_file lk = LOCK_INIT; | |
1359 | uint32_t chunk_ids[6]; | |
1360 | uint64_t chunk_offsets[6]; | |
1361 | const unsigned hashsz = the_hash_algo->rawsz; | |
1362 | struct strbuf progress_title = STRBUF_INIT; | |
1363 | int num_chunks = 3; | |
1364 | struct object_id file_hash; | |
1365 | ||
1366 | if (ctx->split) { | |
1367 | struct strbuf tmp_file = STRBUF_INIT; | |
1368 | ||
1369 | strbuf_addf(&tmp_file, | |
1370 | "%s/info/commit-graphs/tmp_graph_XXXXXX", | |
1371 | ctx->obj_dir); | |
1372 | ctx->graph_name = strbuf_detach(&tmp_file, NULL); | |
1373 | } else { | |
1374 | ctx->graph_name = get_commit_graph_filename(ctx->obj_dir); | |
1375 | } | |
1376 | ||
1377 | if (safe_create_leading_directories(ctx->graph_name)) { | |
1378 | UNLEAK(ctx->graph_name); | |
1379 | error(_("unable to create leading directories of %s"), | |
1380 | ctx->graph_name); | |
1381 | return -1; | |
1382 | } | |
1383 | ||
1384 | if (ctx->split) { | |
1385 | char *lock_name = get_chain_filename(ctx->obj_dir); | |
1386 | ||
1387 | hold_lock_file_for_update(&lk, lock_name, LOCK_DIE_ON_ERROR); | |
1388 | ||
1389 | fd = git_mkstemp_mode(ctx->graph_name, 0444); | |
1390 | if (fd < 0) { | |
1391 | error(_("unable to create '%s'"), ctx->graph_name); | |
1392 | return -1; | |
1393 | } | |
1394 | ||
1395 | f = hashfd(fd, ctx->graph_name); | |
1396 | } else { | |
1397 | hold_lock_file_for_update(&lk, ctx->graph_name, LOCK_DIE_ON_ERROR); | |
1398 | fd = lk.tempfile->fd; | |
1399 | f = hashfd(lk.tempfile->fd, lk.tempfile->filename.buf); | |
1400 | } | |
1401 | ||
1402 | chunk_ids[0] = GRAPH_CHUNKID_OIDFANOUT; | |
1403 | chunk_ids[1] = GRAPH_CHUNKID_OIDLOOKUP; | |
1404 | chunk_ids[2] = GRAPH_CHUNKID_DATA; | |
1405 | if (ctx->num_extra_edges) { | |
1406 | chunk_ids[num_chunks] = GRAPH_CHUNKID_EXTRAEDGES; | |
1407 | num_chunks++; | |
1408 | } | |
1409 | if (ctx->num_commit_graphs_after > 1) { | |
1410 | chunk_ids[num_chunks] = GRAPH_CHUNKID_BASE; | |
1411 | num_chunks++; | |
1412 | } | |
1413 | ||
1414 | chunk_ids[num_chunks] = 0; | |
1415 | ||
1416 | chunk_offsets[0] = 8 + (num_chunks + 1) * GRAPH_CHUNKLOOKUP_WIDTH; | |
1417 | chunk_offsets[1] = chunk_offsets[0] + GRAPH_FANOUT_SIZE; | |
1418 | chunk_offsets[2] = chunk_offsets[1] + hashsz * ctx->commits.nr; | |
1419 | chunk_offsets[3] = chunk_offsets[2] + (hashsz + 16) * ctx->commits.nr; | |
1420 | ||
1421 | num_chunks = 3; | |
1422 | if (ctx->num_extra_edges) { | |
1423 | chunk_offsets[num_chunks + 1] = chunk_offsets[num_chunks] + | |
1424 | 4 * ctx->num_extra_edges; | |
1425 | num_chunks++; | |
1426 | } | |
1427 | if (ctx->num_commit_graphs_after > 1) { | |
1428 | chunk_offsets[num_chunks + 1] = chunk_offsets[num_chunks] + | |
1429 | hashsz * (ctx->num_commit_graphs_after - 1); | |
1430 | num_chunks++; | |
1431 | } | |
1432 | ||
1433 | hashwrite_be32(f, GRAPH_SIGNATURE); | |
1434 | ||
1435 | hashwrite_u8(f, GRAPH_VERSION); | |
1436 | hashwrite_u8(f, oid_version()); | |
1437 | hashwrite_u8(f, num_chunks); | |
1438 | hashwrite_u8(f, ctx->num_commit_graphs_after - 1); | |
1439 | ||
1440 | for (i = 0; i <= num_chunks; i++) { | |
1441 | uint32_t chunk_write[3]; | |
1442 | ||
1443 | chunk_write[0] = htonl(chunk_ids[i]); | |
1444 | chunk_write[1] = htonl(chunk_offsets[i] >> 32); | |
1445 | chunk_write[2] = htonl(chunk_offsets[i] & 0xffffffff); | |
1446 | hashwrite(f, chunk_write, 12); | |
1447 | } | |
1448 | ||
1449 | if (ctx->report_progress) { | |
1450 | strbuf_addf(&progress_title, | |
1451 | Q_("Writing out commit graph in %d pass", | |
1452 | "Writing out commit graph in %d passes", | |
1453 | num_chunks), | |
1454 | num_chunks); | |
1455 | ctx->progress = start_delayed_progress( | |
1456 | progress_title.buf, | |
1457 | num_chunks * ctx->commits.nr); | |
1458 | } | |
1459 | write_graph_chunk_fanout(f, ctx); | |
1460 | write_graph_chunk_oids(f, hashsz, ctx); | |
1461 | write_graph_chunk_data(f, hashsz, ctx); | |
1462 | if (ctx->num_extra_edges) | |
1463 | write_graph_chunk_extra_edges(f, ctx); | |
1464 | if (ctx->num_commit_graphs_after > 1 && | |
1465 | write_graph_chunk_base(f, ctx)) { | |
1466 | return -1; | |
1467 | } | |
1468 | stop_progress(&ctx->progress); | |
1469 | strbuf_release(&progress_title); | |
1470 | ||
1471 | if (ctx->split && ctx->base_graph_name && ctx->num_commit_graphs_after > 1) { | |
1472 | char *new_base_hash = xstrdup(oid_to_hex(&ctx->new_base_graph->oid)); | |
1473 | char *new_base_name = get_split_graph_filename(ctx->new_base_graph->obj_dir, new_base_hash); | |
1474 | ||
1475 | free(ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 2]); | |
1476 | free(ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 2]); | |
1477 | ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 2] = new_base_name; | |
1478 | ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 2] = new_base_hash; | |
1479 | } | |
1480 | ||
1481 | close_commit_graph(ctx->r->objects); | |
1482 | finalize_hashfile(f, file_hash.hash, CSUM_HASH_IN_STREAM | CSUM_FSYNC); | |
1483 | ||
1484 | if (ctx->split) { | |
1485 | FILE *chainf = fdopen_lock_file(&lk, "w"); | |
1486 | char *final_graph_name; | |
1487 | int result; | |
1488 | ||
1489 | close(fd); | |
1490 | ||
1491 | if (!chainf) { | |
1492 | error(_("unable to open commit-graph chain file")); | |
1493 | return -1; | |
1494 | } | |
1495 | ||
1496 | if (ctx->base_graph_name) { | |
1497 | const char *dest = ctx->commit_graph_filenames_after[ | |
1498 | ctx->num_commit_graphs_after - 2]; | |
1499 | ||
1500 | if (strcmp(ctx->base_graph_name, dest)) { | |
1501 | result = rename(ctx->base_graph_name, dest); | |
1502 | ||
1503 | if (result) { | |
1504 | error(_("failed to rename base commit-graph file")); | |
1505 | return -1; | |
1506 | } | |
1507 | } | |
1508 | } else { | |
1509 | char *graph_name = get_commit_graph_filename(ctx->obj_dir); | |
1510 | unlink(graph_name); | |
1511 | } | |
1512 | ||
1513 | ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 1] = xstrdup(oid_to_hex(&file_hash)); | |
1514 | final_graph_name = get_split_graph_filename(ctx->obj_dir, | |
1515 | ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 1]); | |
1516 | ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 1] = final_graph_name; | |
1517 | ||
1518 | result = rename(ctx->graph_name, final_graph_name); | |
1519 | ||
1520 | for (i = 0; i < ctx->num_commit_graphs_after; i++) | |
1521 | fprintf(lk.tempfile->fp, "%s\n", ctx->commit_graph_hash_after[i]); | |
1522 | ||
1523 | if (result) { | |
1524 | error(_("failed to rename temporary commit-graph file")); | |
1525 | return -1; | |
1526 | } | |
1527 | } | |
1528 | ||
1529 | commit_lock_file(&lk); | |
1530 | ||
1531 | return 0; | |
1532 | } | |
1533 | ||
1534 | static void split_graph_merge_strategy(struct write_commit_graph_context *ctx) | |
1535 | { | |
1536 | struct commit_graph *g; | |
1537 | uint32_t num_commits; | |
1538 | uint32_t i; | |
1539 | ||
1540 | int max_commits = 0; | |
1541 | int size_mult = 2; | |
1542 | ||
1543 | if (ctx->split_opts) { | |
1544 | max_commits = ctx->split_opts->max_commits; | |
1545 | size_mult = ctx->split_opts->size_multiple; | |
1546 | } | |
1547 | ||
1548 | g = ctx->r->objects->commit_graph; | |
1549 | num_commits = ctx->commits.nr; | |
1550 | ctx->num_commit_graphs_after = ctx->num_commit_graphs_before + 1; | |
1551 | ||
1552 | while (g && (g->num_commits <= size_mult * num_commits || | |
1553 | (max_commits && num_commits > max_commits))) { | |
1554 | if (strcmp(g->obj_dir, ctx->obj_dir)) | |
1555 | break; | |
1556 | ||
1557 | num_commits += g->num_commits; | |
1558 | g = g->base_graph; | |
1559 | ||
1560 | ctx->num_commit_graphs_after--; | |
1561 | } | |
1562 | ||
1563 | ctx->new_base_graph = g; | |
1564 | ||
1565 | if (ctx->num_commit_graphs_after == 2) { | |
1566 | char *old_graph_name = get_commit_graph_filename(g->obj_dir); | |
1567 | ||
1568 | if (!strcmp(g->filename, old_graph_name) && | |
1569 | strcmp(g->obj_dir, ctx->obj_dir)) { | |
1570 | ctx->num_commit_graphs_after = 1; | |
1571 | ctx->new_base_graph = NULL; | |
1572 | } | |
1573 | ||
1574 | free(old_graph_name); | |
1575 | } | |
1576 | ||
1577 | ALLOC_ARRAY(ctx->commit_graph_filenames_after, ctx->num_commit_graphs_after); | |
1578 | ALLOC_ARRAY(ctx->commit_graph_hash_after, ctx->num_commit_graphs_after); | |
1579 | ||
1580 | for (i = 0; i < ctx->num_commit_graphs_after && | |
1581 | i < ctx->num_commit_graphs_before; i++) | |
1582 | ctx->commit_graph_filenames_after[i] = xstrdup(ctx->commit_graph_filenames_before[i]); | |
1583 | ||
1584 | i = ctx->num_commit_graphs_before - 1; | |
1585 | g = ctx->r->objects->commit_graph; | |
1586 | ||
1587 | while (g) { | |
1588 | if (i < ctx->num_commit_graphs_after) | |
1589 | ctx->commit_graph_hash_after[i] = xstrdup(oid_to_hex(&g->oid)); | |
1590 | ||
1591 | i--; | |
1592 | g = g->base_graph; | |
1593 | } | |
1594 | } | |
1595 | ||
1596 | static void merge_commit_graph(struct write_commit_graph_context *ctx, | |
1597 | struct commit_graph *g) | |
1598 | { | |
1599 | uint32_t i; | |
1600 | uint32_t offset = g->num_commits_in_base; | |
1601 | ||
1602 | ALLOC_GROW(ctx->commits.list, ctx->commits.nr + g->num_commits, ctx->commits.alloc); | |
1603 | ||
1604 | for (i = 0; i < g->num_commits; i++) { | |
1605 | struct object_id oid; | |
1606 | struct commit *result; | |
1607 | ||
1608 | display_progress(ctx->progress, i + 1); | |
1609 | ||
1610 | load_oid_from_graph(g, i + offset, &oid); | |
1611 | ||
1612 | /* only add commits if they still exist in the repo */ | |
1613 | result = lookup_commit_reference_gently(ctx->r, &oid, 1); | |
1614 | ||
1615 | if (result) { | |
1616 | ctx->commits.list[ctx->commits.nr] = result; | |
1617 | ctx->commits.nr++; | |
1618 | } | |
1619 | } | |
1620 | } | |
1621 | ||
1622 | static int commit_compare(const void *_a, const void *_b) | |
1623 | { | |
1624 | const struct commit *a = *(const struct commit **)_a; | |
1625 | const struct commit *b = *(const struct commit **)_b; | |
1626 | return oidcmp(&a->object.oid, &b->object.oid); | |
1627 | } | |
1628 | ||
1629 | static void sort_and_scan_merged_commits(struct write_commit_graph_context *ctx) | |
1630 | { | |
1631 | uint32_t i; | |
1632 | ||
1633 | if (ctx->report_progress) | |
1634 | ctx->progress = start_delayed_progress( | |
1635 | _("Scanning merged commits"), | |
1636 | ctx->commits.nr); | |
1637 | ||
1638 | QSORT(ctx->commits.list, ctx->commits.nr, commit_compare); | |
1639 | ||
1640 | ctx->num_extra_edges = 0; | |
1641 | for (i = 0; i < ctx->commits.nr; i++) { | |
1642 | display_progress(ctx->progress, i); | |
1643 | ||
1644 | if (i && oideq(&ctx->commits.list[i - 1]->object.oid, | |
1645 | &ctx->commits.list[i]->object.oid)) { | |
1646 | die(_("unexpected duplicate commit id %s"), | |
1647 | oid_to_hex(&ctx->commits.list[i]->object.oid)); | |
1648 | } else { | |
1649 | unsigned int num_parents; | |
1650 | ||
1651 | num_parents = commit_list_count(ctx->commits.list[i]->parents); | |
1652 | if (num_parents > 2) | |
1653 | ctx->num_extra_edges += num_parents - 1; | |
1654 | } | |
1655 | } | |
1656 | ||
1657 | stop_progress(&ctx->progress); | |
1658 | } | |
1659 | ||
1660 | static void merge_commit_graphs(struct write_commit_graph_context *ctx) | |
1661 | { | |
1662 | struct commit_graph *g = ctx->r->objects->commit_graph; | |
1663 | uint32_t current_graph_number = ctx->num_commit_graphs_before; | |
1664 | struct strbuf progress_title = STRBUF_INIT; | |
1665 | ||
1666 | while (g && current_graph_number >= ctx->num_commit_graphs_after) { | |
1667 | current_graph_number--; | |
1668 | ||
1669 | if (ctx->report_progress) { | |
1670 | strbuf_addstr(&progress_title, _("Merging commit-graph")); | |
1671 | ctx->progress = start_delayed_progress(progress_title.buf, 0); | |
1672 | } | |
1673 | ||
1674 | merge_commit_graph(ctx, g); | |
1675 | stop_progress(&ctx->progress); | |
1676 | strbuf_release(&progress_title); | |
1677 | ||
1678 | g = g->base_graph; | |
1679 | } | |
1680 | ||
1681 | if (g) { | |
1682 | ctx->new_base_graph = g; | |
1683 | ctx->new_num_commits_in_base = g->num_commits + g->num_commits_in_base; | |
1684 | } | |
1685 | ||
1686 | if (ctx->new_base_graph) | |
1687 | ctx->base_graph_name = xstrdup(ctx->new_base_graph->filename); | |
1688 | ||
1689 | sort_and_scan_merged_commits(ctx); | |
1690 | } | |
1691 | ||
1692 | static void mark_commit_graphs(struct write_commit_graph_context *ctx) | |
1693 | { | |
1694 | uint32_t i; | |
1695 | time_t now = time(NULL); | |
1696 | ||
1697 | for (i = ctx->num_commit_graphs_after - 1; i < ctx->num_commit_graphs_before; i++) { | |
1698 | struct stat st; | |
1699 | struct utimbuf updated_time; | |
1700 | ||
1701 | stat(ctx->commit_graph_filenames_before[i], &st); | |
1702 | ||
1703 | updated_time.actime = st.st_atime; | |
1704 | updated_time.modtime = now; | |
1705 | utime(ctx->commit_graph_filenames_before[i], &updated_time); | |
1706 | } | |
1707 | } | |
1708 | ||
1709 | static void expire_commit_graphs(struct write_commit_graph_context *ctx) | |
1710 | { | |
1711 | struct strbuf path = STRBUF_INIT; | |
1712 | DIR *dir; | |
1713 | struct dirent *de; | |
1714 | size_t dirnamelen; | |
1715 | timestamp_t expire_time = time(NULL); | |
1716 | ||
1717 | if (ctx->split_opts && ctx->split_opts->expire_time) | |
1718 | expire_time -= ctx->split_opts->expire_time; | |
1719 | if (!ctx->split) { | |
1720 | char *chain_file_name = get_chain_filename(ctx->obj_dir); | |
1721 | unlink(chain_file_name); | |
1722 | free(chain_file_name); | |
1723 | ctx->num_commit_graphs_after = 0; | |
1724 | } | |
1725 | ||
1726 | strbuf_addstr(&path, ctx->obj_dir); | |
1727 | strbuf_addstr(&path, "/info/commit-graphs"); | |
1728 | dir = opendir(path.buf); | |
1729 | ||
1730 | if (!dir) | |
1731 | goto out; | |
1732 | ||
1733 | strbuf_addch(&path, '/'); | |
1734 | dirnamelen = path.len; | |
1735 | while ((de = readdir(dir)) != NULL) { | |
1736 | struct stat st; | |
1737 | uint32_t i, found = 0; | |
1738 | ||
1739 | strbuf_setlen(&path, dirnamelen); | |
1740 | strbuf_addstr(&path, de->d_name); | |
1741 | ||
1742 | stat(path.buf, &st); | |
1743 | ||
1744 | if (st.st_mtime > expire_time) | |
1745 | continue; | |
1746 | if (path.len < 6 || strcmp(path.buf + path.len - 6, ".graph")) | |
1747 | continue; | |
1748 | ||
1749 | for (i = 0; i < ctx->num_commit_graphs_after; i++) { | |
1750 | if (!strcmp(ctx->commit_graph_filenames_after[i], | |
1751 | path.buf)) { | |
1752 | found = 1; | |
1753 | break; | |
1754 | } | |
1755 | } | |
1756 | ||
1757 | if (!found) | |
1758 | unlink(path.buf); | |
1759 | } | |
1760 | ||
1761 | out: | |
1762 | strbuf_release(&path); | |
1763 | } | |
1764 | ||
1765 | int write_commit_graph(const char *obj_dir, | |
1766 | struct string_list *pack_indexes, | |
1767 | struct string_list *commit_hex, | |
1768 | enum commit_graph_write_flags flags, | |
1769 | const struct split_commit_graph_opts *split_opts) | |
1770 | { | |
1771 | struct write_commit_graph_context *ctx; | |
1772 | uint32_t i, count_distinct = 0; | |
1773 | size_t len; | |
1774 | int res = 0; | |
1775 | ||
1776 | if (!commit_graph_compatible(the_repository)) | |
1777 | return 0; | |
1778 | ||
1779 | ctx = xcalloc(1, sizeof(struct write_commit_graph_context)); | |
1780 | ctx->r = the_repository; | |
1781 | ||
1782 | /* normalize object dir with no trailing slash */ | |
1783 | ctx->obj_dir = xmallocz(strlen(obj_dir) + 1); | |
1784 | normalize_path_copy(ctx->obj_dir, obj_dir); | |
1785 | len = strlen(ctx->obj_dir); | |
1786 | if (len && ctx->obj_dir[len - 1] == '/') | |
1787 | ctx->obj_dir[len - 1] = 0; | |
1788 | ||
1789 | ctx->append = flags & COMMIT_GRAPH_WRITE_APPEND ? 1 : 0; | |
1790 | ctx->report_progress = flags & COMMIT_GRAPH_WRITE_PROGRESS ? 1 : 0; | |
1791 | ctx->split = flags & COMMIT_GRAPH_WRITE_SPLIT ? 1 : 0; | |
1792 | ctx->check_oids = flags & COMMIT_GRAPH_WRITE_CHECK_OIDS ? 1 : 0; | |
1793 | ctx->split_opts = split_opts; | |
1794 | ||
1795 | if (ctx->split) { | |
1796 | struct commit_graph *g; | |
1797 | prepare_commit_graph(ctx->r); | |
1798 | ||
1799 | g = ctx->r->objects->commit_graph; | |
1800 | ||
1801 | while (g) { | |
1802 | ctx->num_commit_graphs_before++; | |
1803 | g = g->base_graph; | |
1804 | } | |
1805 | ||
1806 | if (ctx->num_commit_graphs_before) { | |
1807 | ALLOC_ARRAY(ctx->commit_graph_filenames_before, ctx->num_commit_graphs_before); | |
1808 | i = ctx->num_commit_graphs_before; | |
1809 | g = ctx->r->objects->commit_graph; | |
1810 | ||
1811 | while (g) { | |
1812 | ctx->commit_graph_filenames_before[--i] = xstrdup(g->filename); | |
1813 | g = g->base_graph; | |
1814 | } | |
1815 | } | |
1816 | } | |
1817 | ||
1818 | ctx->approx_nr_objects = approximate_object_count(); | |
1819 | ctx->oids.alloc = ctx->approx_nr_objects / 32; | |
1820 | ||
1821 | if (ctx->split && split_opts && ctx->oids.alloc > split_opts->max_commits) | |
1822 | ctx->oids.alloc = split_opts->max_commits; | |
1823 | ||
1824 | if (ctx->append) { | |
1825 | prepare_commit_graph_one(ctx->r, ctx->obj_dir); | |
1826 | if (ctx->r->objects->commit_graph) | |
1827 | ctx->oids.alloc += ctx->r->objects->commit_graph->num_commits; | |
1828 | } | |
1829 | ||
1830 | if (ctx->oids.alloc < 1024) | |
1831 | ctx->oids.alloc = 1024; | |
1832 | ALLOC_ARRAY(ctx->oids.list, ctx->oids.alloc); | |
1833 | ||
1834 | if (ctx->append && ctx->r->objects->commit_graph) { | |
1835 | struct commit_graph *g = ctx->r->objects->commit_graph; | |
1836 | for (i = 0; i < g->num_commits; i++) { | |
1837 | const unsigned char *hash = g->chunk_oid_lookup + g->hash_len * i; | |
1838 | hashcpy(ctx->oids.list[ctx->oids.nr++].hash, hash); | |
1839 | } | |
1840 | } | |
1841 | ||
1842 | if (pack_indexes) { | |
1843 | if ((res = fill_oids_from_packs(ctx, pack_indexes))) | |
1844 | goto cleanup; | |
1845 | } | |
1846 | ||
1847 | if (commit_hex) { | |
1848 | if ((res = fill_oids_from_commit_hex(ctx, commit_hex))) | |
1849 | goto cleanup; | |
1850 | } | |
1851 | ||
1852 | if (!pack_indexes && !commit_hex) | |
1853 | fill_oids_from_all_packs(ctx); | |
1854 | ||
1855 | close_reachable(ctx); | |
1856 | ||
1857 | count_distinct = count_distinct_commits(ctx); | |
1858 | ||
1859 | if (count_distinct >= GRAPH_EDGE_LAST_MASK) { | |
1860 | error(_("the commit graph format cannot write %d commits"), count_distinct); | |
1861 | res = -1; | |
1862 | goto cleanup; | |
1863 | } | |
1864 | ||
1865 | ctx->commits.alloc = count_distinct; | |
1866 | ALLOC_ARRAY(ctx->commits.list, ctx->commits.alloc); | |
1867 | ||
1868 | copy_oids_to_commits(ctx); | |
1869 | ||
1870 | if (ctx->commits.nr >= GRAPH_EDGE_LAST_MASK) { | |
1871 | error(_("too many commits to write graph")); | |
1872 | res = -1; | |
1873 | goto cleanup; | |
1874 | } | |
1875 | ||
1876 | if (!ctx->commits.nr) | |
1877 | goto cleanup; | |
1878 | ||
1879 | if (ctx->split) { | |
1880 | split_graph_merge_strategy(ctx); | |
1881 | ||
1882 | merge_commit_graphs(ctx); | |
1883 | } else | |
1884 | ctx->num_commit_graphs_after = 1; | |
1885 | ||
1886 | compute_generation_numbers(ctx); | |
1887 | ||
1888 | res = write_commit_graph_file(ctx); | |
1889 | ||
1890 | if (ctx->split) | |
1891 | mark_commit_graphs(ctx); | |
1892 | ||
1893 | expire_commit_graphs(ctx); | |
1894 | ||
1895 | cleanup: | |
1896 | free(ctx->graph_name); | |
1897 | free(ctx->commits.list); | |
1898 | free(ctx->oids.list); | |
1899 | free(ctx->obj_dir); | |
1900 | ||
1901 | if (ctx->commit_graph_filenames_after) { | |
1902 | for (i = 0; i < ctx->num_commit_graphs_after; i++) { | |
1903 | free(ctx->commit_graph_filenames_after[i]); | |
1904 | free(ctx->commit_graph_hash_after[i]); | |
1905 | } | |
1906 | ||
1907 | for (i = 0; i < ctx->num_commit_graphs_before; i++) | |
1908 | free(ctx->commit_graph_filenames_before[i]); | |
1909 | ||
1910 | free(ctx->commit_graph_filenames_after); | |
1911 | free(ctx->commit_graph_filenames_before); | |
1912 | free(ctx->commit_graph_hash_after); | |
1913 | } | |
1914 | ||
1915 | free(ctx); | |
1916 | ||
1917 | return res; | |
1918 | } | |
1919 | ||
1920 | #define VERIFY_COMMIT_GRAPH_ERROR_HASH 2 | |
1921 | static int verify_commit_graph_error; | |
1922 | ||
1923 | static void graph_report(const char *fmt, ...) | |
1924 | { | |
1925 | va_list ap; | |
1926 | ||
1927 | verify_commit_graph_error = 1; | |
1928 | va_start(ap, fmt); | |
1929 | vfprintf(stderr, fmt, ap); | |
1930 | fprintf(stderr, "\n"); | |
1931 | va_end(ap); | |
1932 | } | |
1933 | ||
1934 | #define GENERATION_ZERO_EXISTS 1 | |
1935 | #define GENERATION_NUMBER_EXISTS 2 | |
1936 | ||
1937 | int verify_commit_graph(struct repository *r, struct commit_graph *g, int flags) | |
1938 | { | |
1939 | uint32_t i, cur_fanout_pos = 0; | |
1940 | struct object_id prev_oid, cur_oid, checksum; | |
1941 | int generation_zero = 0; | |
1942 | struct hashfile *f; | |
1943 | int devnull; | |
1944 | struct progress *progress = NULL; | |
1945 | int local_error = 0; | |
1946 | ||
1947 | if (!g) { | |
1948 | graph_report("no commit-graph file loaded"); | |
1949 | return 1; | |
1950 | } | |
1951 | ||
1952 | verify_commit_graph_error = verify_commit_graph_lite(g); | |
1953 | if (verify_commit_graph_error) | |
1954 | return verify_commit_graph_error; | |
1955 | ||
1956 | devnull = open("/dev/null", O_WRONLY); | |
1957 | f = hashfd(devnull, NULL); | |
1958 | hashwrite(f, g->data, g->data_len - g->hash_len); | |
1959 | finalize_hashfile(f, checksum.hash, CSUM_CLOSE); | |
1960 | if (!hasheq(checksum.hash, g->data + g->data_len - g->hash_len)) { | |
1961 | graph_report(_("the commit-graph file has incorrect checksum and is likely corrupt")); | |
1962 | verify_commit_graph_error = VERIFY_COMMIT_GRAPH_ERROR_HASH; | |
1963 | } | |
1964 | ||
1965 | for (i = 0; i < g->num_commits; i++) { | |
1966 | struct commit *graph_commit; | |
1967 | ||
1968 | hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i); | |
1969 | ||
1970 | if (i && oidcmp(&prev_oid, &cur_oid) >= 0) | |
1971 | graph_report(_("commit-graph has incorrect OID order: %s then %s"), | |
1972 | oid_to_hex(&prev_oid), | |
1973 | oid_to_hex(&cur_oid)); | |
1974 | ||
1975 | oidcpy(&prev_oid, &cur_oid); | |
1976 | ||
1977 | while (cur_oid.hash[0] > cur_fanout_pos) { | |
1978 | uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos); | |
1979 | ||
1980 | if (i != fanout_value) | |
1981 | graph_report(_("commit-graph has incorrect fanout value: fanout[%d] = %u != %u"), | |
1982 | cur_fanout_pos, fanout_value, i); | |
1983 | cur_fanout_pos++; | |
1984 | } | |
1985 | ||
1986 | graph_commit = lookup_commit(r, &cur_oid); | |
1987 | if (!parse_commit_in_graph_one(r, g, graph_commit)) | |
1988 | graph_report(_("failed to parse commit %s from commit-graph"), | |
1989 | oid_to_hex(&cur_oid)); | |
1990 | } | |
1991 | ||
1992 | while (cur_fanout_pos < 256) { | |
1993 | uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos); | |
1994 | ||
1995 | if (g->num_commits != fanout_value) | |
1996 | graph_report(_("commit-graph has incorrect fanout value: fanout[%d] = %u != %u"), | |
1997 | cur_fanout_pos, fanout_value, i); | |
1998 | ||
1999 | cur_fanout_pos++; | |
2000 | } | |
2001 | ||
2002 | if (verify_commit_graph_error & ~VERIFY_COMMIT_GRAPH_ERROR_HASH) | |
2003 | return verify_commit_graph_error; | |
2004 | ||
2005 | if (flags & COMMIT_GRAPH_WRITE_PROGRESS) | |
2006 | progress = start_progress(_("Verifying commits in commit graph"), | |
2007 | g->num_commits); | |
2008 | ||
2009 | for (i = 0; i < g->num_commits; i++) { | |
2010 | struct commit *graph_commit, *odb_commit; | |
2011 | struct commit_list *graph_parents, *odb_parents; | |
2012 | uint32_t max_generation = 0; | |
2013 | ||
2014 | display_progress(progress, i + 1); | |
2015 | hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i); | |
2016 | ||
2017 | graph_commit = lookup_commit(r, &cur_oid); | |
2018 | odb_commit = (struct commit *)create_object(r, &cur_oid, alloc_commit_node(r)); | |
2019 | if (parse_commit_internal(odb_commit, 0, 0)) { | |
2020 | graph_report(_("failed to parse commit %s from object database for commit-graph"), | |
2021 | oid_to_hex(&cur_oid)); | |
2022 | continue; | |
2023 | } | |
2024 | ||
2025 | if (!oideq(&get_commit_tree_in_graph_one(r, g, graph_commit)->object.oid, | |
2026 | get_commit_tree_oid(odb_commit))) | |
2027 | graph_report(_("root tree OID for commit %s in commit-graph is %s != %s"), | |
2028 | oid_to_hex(&cur_oid), | |
2029 | oid_to_hex(get_commit_tree_oid(graph_commit)), | |
2030 | oid_to_hex(get_commit_tree_oid(odb_commit))); | |
2031 | ||
2032 | graph_parents = graph_commit->parents; | |
2033 | odb_parents = odb_commit->parents; | |
2034 | ||
2035 | while (graph_parents) { | |
2036 | if (odb_parents == NULL) { | |
2037 | graph_report(_("commit-graph parent list for commit %s is too long"), | |
2038 | oid_to_hex(&cur_oid)); | |
2039 | break; | |
2040 | } | |
2041 | ||
2042 | /* parse parent in case it is in a base graph */ | |
2043 | parse_commit_in_graph_one(r, g, graph_parents->item); | |
2044 | ||
2045 | if (!oideq(&graph_parents->item->object.oid, &odb_parents->item->object.oid)) | |
2046 | graph_report(_("commit-graph parent for %s is %s != %s"), | |
2047 | oid_to_hex(&cur_oid), | |
2048 | oid_to_hex(&graph_parents->item->object.oid), | |
2049 | oid_to_hex(&odb_parents->item->object.oid)); | |
2050 | ||
2051 | if (graph_parents->item->generation > max_generation) | |
2052 | max_generation = graph_parents->item->generation; | |
2053 | ||
2054 | graph_parents = graph_parents->next; | |
2055 | odb_parents = odb_parents->next; | |
2056 | } | |
2057 | ||
2058 | if (odb_parents != NULL) | |
2059 | graph_report(_("commit-graph parent list for commit %s terminates early"), | |
2060 | oid_to_hex(&cur_oid)); | |
2061 | ||
2062 | if (!graph_commit->generation) { | |
2063 | if (generation_zero == GENERATION_NUMBER_EXISTS) | |
2064 | graph_report(_("commit-graph has generation number zero for commit %s, but non-zero elsewhere"), | |
2065 | oid_to_hex(&cur_oid)); | |
2066 | generation_zero = GENERATION_ZERO_EXISTS; | |
2067 | } else if (generation_zero == GENERATION_ZERO_EXISTS) | |
2068 | graph_report(_("commit-graph has non-zero generation number for commit %s, but zero elsewhere"), | |
2069 | oid_to_hex(&cur_oid)); | |
2070 | ||
2071 | if (generation_zero == GENERATION_ZERO_EXISTS) | |
2072 | continue; | |
2073 | ||
2074 | /* | |
2075 | * If one of our parents has generation GENERATION_NUMBER_MAX, then | |
2076 | * our generation is also GENERATION_NUMBER_MAX. Decrement to avoid | |
2077 | * extra logic in the following condition. | |
2078 | */ | |
2079 | if (max_generation == GENERATION_NUMBER_MAX) | |
2080 | max_generation--; | |
2081 | ||
2082 | if (graph_commit->generation != max_generation + 1) | |
2083 | graph_report(_("commit-graph generation for commit %s is %u != %u"), | |
2084 | oid_to_hex(&cur_oid), | |
2085 | graph_commit->generation, | |
2086 | max_generation + 1); | |
2087 | ||
2088 | if (graph_commit->date != odb_commit->date) | |
2089 | graph_report(_("commit date for commit %s in commit-graph is %"PRItime" != %"PRItime), | |
2090 | oid_to_hex(&cur_oid), | |
2091 | graph_commit->date, | |
2092 | odb_commit->date); | |
2093 | } | |
2094 | stop_progress(&progress); | |
2095 | ||
2096 | local_error = verify_commit_graph_error; | |
2097 | ||
2098 | if (!(flags & COMMIT_GRAPH_VERIFY_SHALLOW) && g->base_graph) | |
2099 | local_error |= verify_commit_graph(r, g->base_graph, flags); | |
2100 | ||
2101 | return local_error; | |
2102 | } | |
2103 | ||
2104 | void free_commit_graph(struct commit_graph *g) | |
2105 | { | |
2106 | if (!g) | |
2107 | return; | |
2108 | if (g->graph_fd >= 0) { | |
2109 | munmap((void *)g->data, g->data_len); | |
2110 | g->data = NULL; | |
2111 | close(g->graph_fd); | |
2112 | } | |
2113 | free(g->filename); | |
2114 | free(g); | |
2115 | } | |
2116 | ||
2117 | void disable_commit_graph(struct repository *r) | |
2118 | { | |
2119 | r->commit_graph_disabled = 1; | |
2120 | } |