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Commit | Line | Data |
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08fd81c9 DS |
1 | #include "cache.h" |
2 | #include "config.h" | |
33286dcd | 3 | #include "dir.h" |
08fd81c9 DS |
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" | |
59fb8770 | 10 | #include "refs.h" |
08fd81c9 DS |
11 | #include "revision.h" |
12 | #include "sha1-lookup.h" | |
13 | #include "commit-graph.h" | |
b10edb2d | 14 | #include "object-store.h" |
96af91d4 | 15 | #include "alloc.h" |
d6538246 DS |
16 | #include "hashmap.h" |
17 | #include "replace-object.h" | |
7b0f2292 | 18 | #include "progress.h" |
08fd81c9 DS |
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" */ | |
5af7417b | 24 | #define GRAPH_CHUNKID_EXTRAEDGES 0x45444745 /* "EDGE" */ |
08fd81c9 | 25 | |
c1665998 | 26 | #define GRAPH_DATA_WIDTH (the_hash_algo->rawsz + 16) |
08fd81c9 DS |
27 | |
28 | #define GRAPH_VERSION_1 0x1 | |
29 | #define GRAPH_VERSION GRAPH_VERSION_1 | |
30 | ||
5af7417b | 31 | #define GRAPH_EXTRA_EDGES_NEEDED 0x80000000 |
08fd81c9 DS |
32 | #define GRAPH_EDGE_LAST_MASK 0x7fffffff |
33 | #define GRAPH_PARENT_NONE 0x70000000 | |
34 | ||
35 | #define GRAPH_LAST_EDGE 0x80000000 | |
36 | ||
0e3b97cc | 37 | #define GRAPH_HEADER_SIZE 8 |
08fd81c9 DS |
38 | #define GRAPH_FANOUT_SIZE (4 * 256) |
39 | #define GRAPH_CHUNKLOOKUP_WIDTH 12 | |
0e3b97cc | 40 | #define GRAPH_MIN_SIZE (GRAPH_HEADER_SIZE + 4 * GRAPH_CHUNKLOOKUP_WIDTH \ |
c1665998 | 41 | + GRAPH_FANOUT_SIZE + the_hash_algo->rawsz) |
08fd81c9 | 42 | |
2a2e32bd | 43 | char *get_commit_graph_filename(const char *obj_dir) |
08fd81c9 DS |
44 | { |
45 | return xstrfmt("%s/info/commit-graph", obj_dir); | |
46 | } | |
47 | ||
c1665998 | 48 | static uint8_t oid_version(void) |
49 | { | |
50 | return 1; | |
51 | } | |
52 | ||
2a2e32bd DS |
53 | static struct commit_graph *alloc_commit_graph(void) |
54 | { | |
55 | struct commit_graph *g = xcalloc(1, sizeof(*g)); | |
56 | g->graph_fd = -1; | |
57 | ||
58 | return g; | |
59 | } | |
60 | ||
d6538246 DS |
61 | extern int read_replace_refs; |
62 | ||
63 | static int commit_graph_compatible(struct repository *r) | |
64 | { | |
5cef295f DS |
65 | if (!r->gitdir) |
66 | return 0; | |
67 | ||
d6538246 DS |
68 | if (read_replace_refs) { |
69 | prepare_replace_object(r); | |
70 | if (hashmap_get_size(&r->objects->replace_map->map)) | |
71 | return 0; | |
72 | } | |
73 | ||
20fd6d57 DS |
74 | prepare_commit_graft(r); |
75 | if (r->parsed_objects && r->parsed_objects->grafts_nr) | |
76 | return 0; | |
77 | if (is_repository_shallow(r)) | |
78 | return 0; | |
79 | ||
d6538246 DS |
80 | return 1; |
81 | } | |
82 | ||
61df89c8 ÆAB |
83 | int open_commit_graph(const char *graph_file, int *fd, struct stat *st) |
84 | { | |
85 | *fd = git_open(graph_file); | |
86 | if (*fd < 0) | |
87 | return 0; | |
88 | if (fstat(*fd, st)) { | |
89 | close(*fd); | |
90 | return 0; | |
91 | } | |
92 | return 1; | |
93 | } | |
94 | ||
95 | struct commit_graph *load_commit_graph_one_fd_st(const char *graph_file, | |
96 | int fd, struct stat *st) | |
2a2e32bd DS |
97 | { |
98 | void *graph_map; | |
2a2e32bd | 99 | size_t graph_size; |
aa658574 | 100 | struct commit_graph *ret; |
2a2e32bd | 101 | |
61df89c8 | 102 | graph_size = xsize_t(st->st_size); |
2a2e32bd DS |
103 | |
104 | if (graph_size < GRAPH_MIN_SIZE) { | |
105 | close(fd); | |
61df89c8 ÆAB |
106 | error(_("graph file %s is too small"), graph_file); |
107 | return NULL; | |
2a2e32bd DS |
108 | } |
109 | graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
aa658574 JS |
110 | ret = parse_commit_graph(graph_map, fd, graph_size); |
111 | ||
112 | if (!ret) { | |
113 | munmap(graph_map, graph_size); | |
114 | close(fd); | |
aa658574 JS |
115 | } |
116 | ||
117 | return ret; | |
118 | } | |
119 | ||
2ac138d5 ÆAB |
120 | static int verify_commit_graph_lite(struct commit_graph *g) |
121 | { | |
122 | /* | |
123 | * Basic validation shared between parse_commit_graph() | |
124 | * which'll be called every time the graph is used, and the | |
125 | * much more expensive verify_commit_graph() used by | |
126 | * "commit-graph verify". | |
127 | * | |
128 | * There should only be very basic checks here to ensure that | |
129 | * we don't e.g. segfault in fill_commit_in_graph(), but | |
130 | * because this is a very hot codepath nothing that e.g. loops | |
131 | * over g->num_commits, or runs a checksum on the commit-graph | |
132 | * itself. | |
133 | */ | |
134 | if (!g->chunk_oid_fanout) { | |
135 | error("commit-graph is missing the OID Fanout chunk"); | |
136 | return 1; | |
137 | } | |
138 | if (!g->chunk_oid_lookup) { | |
139 | error("commit-graph is missing the OID Lookup chunk"); | |
140 | return 1; | |
141 | } | |
142 | if (!g->chunk_commit_data) { | |
143 | error("commit-graph is missing the Commit Data chunk"); | |
144 | return 1; | |
145 | } | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
aa658574 JS |
150 | struct commit_graph *parse_commit_graph(void *graph_map, int fd, |
151 | size_t graph_size) | |
152 | { | |
153 | const unsigned char *data, *chunk_lookup; | |
154 | uint32_t i; | |
155 | struct commit_graph *graph; | |
156 | uint64_t last_chunk_offset; | |
157 | uint32_t last_chunk_id; | |
158 | uint32_t graph_signature; | |
159 | unsigned char graph_version, hash_version; | |
160 | ||
161 | if (!graph_map) | |
162 | return NULL; | |
163 | ||
164 | if (graph_size < GRAPH_MIN_SIZE) | |
165 | return NULL; | |
166 | ||
2a2e32bd DS |
167 | data = (const unsigned char *)graph_map; |
168 | ||
169 | graph_signature = get_be32(data); | |
170 | if (graph_signature != GRAPH_SIGNATURE) { | |
4f5b532d | 171 | error(_("graph signature %X does not match signature %X"), |
2a2e32bd | 172 | graph_signature, GRAPH_SIGNATURE); |
aa658574 | 173 | return NULL; |
2a2e32bd DS |
174 | } |
175 | ||
176 | graph_version = *(unsigned char*)(data + 4); | |
177 | if (graph_version != GRAPH_VERSION) { | |
4f5b532d | 178 | error(_("graph version %X does not match version %X"), |
2a2e32bd | 179 | graph_version, GRAPH_VERSION); |
aa658574 | 180 | return NULL; |
2a2e32bd DS |
181 | } |
182 | ||
183 | hash_version = *(unsigned char*)(data + 5); | |
c1665998 | 184 | if (hash_version != oid_version()) { |
4f5b532d | 185 | error(_("hash version %X does not match version %X"), |
c1665998 | 186 | hash_version, oid_version()); |
aa658574 | 187 | return NULL; |
2a2e32bd DS |
188 | } |
189 | ||
190 | graph = alloc_commit_graph(); | |
191 | ||
c1665998 | 192 | graph->hash_len = the_hash_algo->rawsz; |
2a2e32bd DS |
193 | graph->num_chunks = *(unsigned char*)(data + 6); |
194 | graph->graph_fd = fd; | |
195 | graph->data = graph_map; | |
196 | graph->data_len = graph_size; | |
197 | ||
198 | last_chunk_id = 0; | |
199 | last_chunk_offset = 8; | |
200 | chunk_lookup = data + 8; | |
201 | for (i = 0; i < graph->num_chunks; i++) { | |
d2b86fba JS |
202 | uint32_t chunk_id; |
203 | uint64_t chunk_offset; | |
2a2e32bd DS |
204 | int chunk_repeated = 0; |
205 | ||
d2b86fba JS |
206 | if (data + graph_size - chunk_lookup < |
207 | GRAPH_CHUNKLOOKUP_WIDTH) { | |
208 | error(_("chunk lookup table entry missing; graph file may be incomplete")); | |
209 | free(graph); | |
210 | return NULL; | |
211 | } | |
212 | ||
213 | chunk_id = get_be32(chunk_lookup + 0); | |
214 | chunk_offset = get_be64(chunk_lookup + 4); | |
215 | ||
2a2e32bd DS |
216 | chunk_lookup += GRAPH_CHUNKLOOKUP_WIDTH; |
217 | ||
c1665998 | 218 | if (chunk_offset > graph_size - the_hash_algo->rawsz) { |
4f5b532d | 219 | error(_("improper chunk offset %08x%08x"), (uint32_t)(chunk_offset >> 32), |
2a2e32bd | 220 | (uint32_t)chunk_offset); |
aa658574 JS |
221 | free(graph); |
222 | return NULL; | |
2a2e32bd DS |
223 | } |
224 | ||
225 | switch (chunk_id) { | |
226 | case GRAPH_CHUNKID_OIDFANOUT: | |
227 | if (graph->chunk_oid_fanout) | |
228 | chunk_repeated = 1; | |
229 | else | |
230 | graph->chunk_oid_fanout = (uint32_t*)(data + chunk_offset); | |
231 | break; | |
232 | ||
233 | case GRAPH_CHUNKID_OIDLOOKUP: | |
234 | if (graph->chunk_oid_lookup) | |
235 | chunk_repeated = 1; | |
236 | else | |
237 | graph->chunk_oid_lookup = data + chunk_offset; | |
238 | break; | |
239 | ||
240 | case GRAPH_CHUNKID_DATA: | |
241 | if (graph->chunk_commit_data) | |
242 | chunk_repeated = 1; | |
243 | else | |
244 | graph->chunk_commit_data = data + chunk_offset; | |
245 | break; | |
246 | ||
5af7417b SG |
247 | case GRAPH_CHUNKID_EXTRAEDGES: |
248 | if (graph->chunk_extra_edges) | |
2a2e32bd DS |
249 | chunk_repeated = 1; |
250 | else | |
5af7417b | 251 | graph->chunk_extra_edges = data + chunk_offset; |
2a2e32bd DS |
252 | break; |
253 | } | |
254 | ||
255 | if (chunk_repeated) { | |
4f5b532d | 256 | error(_("chunk id %08x appears multiple times"), chunk_id); |
aa658574 JS |
257 | free(graph); |
258 | return NULL; | |
2a2e32bd DS |
259 | } |
260 | ||
261 | if (last_chunk_id == GRAPH_CHUNKID_OIDLOOKUP) | |
262 | { | |
263 | graph->num_commits = (chunk_offset - last_chunk_offset) | |
264 | / graph->hash_len; | |
265 | } | |
266 | ||
267 | last_chunk_id = chunk_id; | |
268 | last_chunk_offset = chunk_offset; | |
269 | } | |
270 | ||
2ac138d5 ÆAB |
271 | if (verify_commit_graph_lite(graph)) |
272 | return NULL; | |
273 | ||
2a2e32bd | 274 | return graph; |
2a2e32bd DS |
275 | } |
276 | ||
61df89c8 ÆAB |
277 | static struct commit_graph *load_commit_graph_one(const char *graph_file) |
278 | { | |
279 | ||
280 | struct stat st; | |
281 | int fd; | |
282 | int open_ok = open_commit_graph(graph_file, &fd, &st); | |
283 | ||
284 | if (!open_ok) | |
285 | return NULL; | |
286 | ||
287 | return load_commit_graph_one_fd_st(graph_file, fd, &st); | |
288 | } | |
289 | ||
dade47c0 | 290 | static void prepare_commit_graph_one(struct repository *r, const char *obj_dir) |
177722b3 DS |
291 | { |
292 | char *graph_name; | |
293 | ||
dade47c0 | 294 | if (r->objects->commit_graph) |
177722b3 DS |
295 | return; |
296 | ||
297 | graph_name = get_commit_graph_filename(obj_dir); | |
dade47c0 | 298 | r->objects->commit_graph = |
85277506 | 299 | load_commit_graph_one(graph_name); |
177722b3 DS |
300 | |
301 | FREE_AND_NULL(graph_name); | |
302 | } | |
303 | ||
5faf357b JT |
304 | /* |
305 | * Return 1 if commit_graph is non-NULL, and 0 otherwise. | |
306 | * | |
307 | * On the first invocation, this function attemps to load the commit | |
308 | * graph if the_repository is configured to have one. | |
309 | */ | |
dade47c0 | 310 | static int prepare_commit_graph(struct repository *r) |
177722b3 | 311 | { |
263db403 | 312 | struct object_directory *odb; |
dade47c0 JT |
313 | int config_value; |
314 | ||
315 | if (r->objects->commit_graph_attempted) | |
316 | return !!r->objects->commit_graph; | |
317 | r->objects->commit_graph_attempted = 1; | |
318 | ||
859fdc0c DS |
319 | if (!git_env_bool(GIT_TEST_COMMIT_GRAPH, 0) && |
320 | (repo_config_get_bool(r, "core.commitgraph", &config_value) || | |
321 | !config_value)) | |
dade47c0 JT |
322 | /* |
323 | * This repository is not configured to use commit graphs, so | |
324 | * do not load one. (But report commit_graph_attempted anyway | |
325 | * so that commit graph loading is not attempted again for this | |
326 | * repository.) | |
327 | */ | |
5faf357b JT |
328 | return 0; |
329 | ||
d6538246 DS |
330 | if (!commit_graph_compatible(r)) |
331 | return 0; | |
332 | ||
dade47c0 | 333 | prepare_alt_odb(r); |
f0eaf638 | 334 | for (odb = r->objects->odb; |
263db403 JK |
335 | !r->objects->commit_graph && odb; |
336 | odb = odb->next) | |
337 | prepare_commit_graph_one(r, odb->path); | |
dade47c0 | 338 | return !!r->objects->commit_graph; |
177722b3 DS |
339 | } |
340 | ||
6cc01743 DS |
341 | int generation_numbers_enabled(struct repository *r) |
342 | { | |
343 | uint32_t first_generation; | |
344 | struct commit_graph *g; | |
345 | if (!prepare_commit_graph(r)) | |
346 | return 0; | |
347 | ||
348 | g = r->objects->commit_graph; | |
349 | ||
350 | if (!g->num_commits) | |
351 | return 0; | |
352 | ||
353 | first_generation = get_be32(g->chunk_commit_data + | |
354 | g->hash_len + 8) >> 2; | |
355 | ||
356 | return !!first_generation; | |
357 | } | |
358 | ||
829a3215 | 359 | void close_commit_graph(struct repository *r) |
177722b3 | 360 | { |
829a3215 DS |
361 | free_commit_graph(r->objects->commit_graph); |
362 | r->objects->commit_graph = NULL; | |
177722b3 DS |
363 | } |
364 | ||
365 | static int bsearch_graph(struct commit_graph *g, struct object_id *oid, uint32_t *pos) | |
366 | { | |
367 | return bsearch_hash(oid->hash, g->chunk_oid_fanout, | |
368 | g->chunk_oid_lookup, g->hash_len, pos); | |
369 | } | |
370 | ||
4f542b7a SB |
371 | static struct commit_list **insert_parent_or_die(struct repository *r, |
372 | struct commit_graph *g, | |
177722b3 DS |
373 | uint64_t pos, |
374 | struct commit_list **pptr) | |
375 | { | |
376 | struct commit *c; | |
377 | struct object_id oid; | |
96af91d4 | 378 | |
53614b13 DS |
379 | if (pos >= g->num_commits) |
380 | die("invalid parent position %"PRIu64, pos); | |
381 | ||
177722b3 | 382 | hashcpy(oid.hash, g->chunk_oid_lookup + g->hash_len * pos); |
4f542b7a | 383 | c = lookup_commit(r, &oid); |
177722b3 | 384 | if (!c) |
4f5b532d | 385 | die(_("could not find commit %s"), oid_to_hex(&oid)); |
177722b3 DS |
386 | c->graph_pos = pos; |
387 | return &commit_list_insert(c, pptr)->next; | |
388 | } | |
389 | ||
e2838d85 DS |
390 | static void fill_commit_graph_info(struct commit *item, struct commit_graph *g, uint32_t pos) |
391 | { | |
392 | const unsigned char *commit_data = g->chunk_commit_data + GRAPH_DATA_WIDTH * pos; | |
393 | item->graph_pos = pos; | |
394 | item->generation = get_be32(commit_data + g->hash_len + 8) >> 2; | |
395 | } | |
396 | ||
4f542b7a SB |
397 | static int fill_commit_in_graph(struct repository *r, |
398 | struct commit *item, | |
399 | struct commit_graph *g, uint32_t pos) | |
177722b3 | 400 | { |
177722b3 DS |
401 | uint32_t edge_value; |
402 | uint32_t *parent_data_ptr; | |
403 | uint64_t date_low, date_high; | |
404 | struct commit_list **pptr; | |
405 | const unsigned char *commit_data = g->chunk_commit_data + (g->hash_len + 16) * pos; | |
406 | ||
407 | item->object.parsed = 1; | |
408 | item->graph_pos = pos; | |
409 | ||
7b8a21db | 410 | item->maybe_tree = NULL; |
177722b3 DS |
411 | |
412 | date_high = get_be32(commit_data + g->hash_len + 8) & 0x3; | |
413 | date_low = get_be32(commit_data + g->hash_len + 12); | |
414 | item->date = (timestamp_t)((date_high << 32) | date_low); | |
415 | ||
83073cc9 DS |
416 | item->generation = get_be32(commit_data + g->hash_len + 8) >> 2; |
417 | ||
177722b3 DS |
418 | pptr = &item->parents; |
419 | ||
420 | edge_value = get_be32(commit_data + g->hash_len); | |
421 | if (edge_value == GRAPH_PARENT_NONE) | |
422 | return 1; | |
4f542b7a | 423 | pptr = insert_parent_or_die(r, g, edge_value, pptr); |
177722b3 DS |
424 | |
425 | edge_value = get_be32(commit_data + g->hash_len + 4); | |
426 | if (edge_value == GRAPH_PARENT_NONE) | |
427 | return 1; | |
5af7417b | 428 | if (!(edge_value & GRAPH_EXTRA_EDGES_NEEDED)) { |
4f542b7a | 429 | pptr = insert_parent_or_die(r, g, edge_value, pptr); |
177722b3 DS |
430 | return 1; |
431 | } | |
432 | ||
5af7417b | 433 | parent_data_ptr = (uint32_t*)(g->chunk_extra_edges + |
177722b3 DS |
434 | 4 * (uint64_t)(edge_value & GRAPH_EDGE_LAST_MASK)); |
435 | do { | |
436 | edge_value = get_be32(parent_data_ptr); | |
4f542b7a | 437 | pptr = insert_parent_or_die(r, g, |
177722b3 DS |
438 | edge_value & GRAPH_EDGE_LAST_MASK, |
439 | pptr); | |
440 | parent_data_ptr++; | |
441 | } while (!(edge_value & GRAPH_LAST_EDGE)); | |
442 | ||
443 | return 1; | |
444 | } | |
445 | ||
e2838d85 DS |
446 | static int find_commit_in_graph(struct commit *item, struct commit_graph *g, uint32_t *pos) |
447 | { | |
448 | if (item->graph_pos != COMMIT_NOT_FROM_GRAPH) { | |
449 | *pos = item->graph_pos; | |
450 | return 1; | |
451 | } else { | |
452 | return bsearch_graph(g, &(item->object.oid), pos); | |
453 | } | |
454 | } | |
455 | ||
4f542b7a SB |
456 | static int parse_commit_in_graph_one(struct repository *r, |
457 | struct commit_graph *g, | |
458 | struct commit *item) | |
177722b3 | 459 | { |
e2838d85 DS |
460 | uint32_t pos; |
461 | ||
177722b3 DS |
462 | if (item->object.parsed) |
463 | return 1; | |
ee797053 DS |
464 | |
465 | if (find_commit_in_graph(item, g, &pos)) | |
4f542b7a | 466 | return fill_commit_in_graph(r, item, g, pos); |
ee797053 DS |
467 | |
468 | return 0; | |
469 | } | |
470 | ||
dade47c0 | 471 | int parse_commit_in_graph(struct repository *r, struct commit *item) |
ee797053 | 472 | { |
dade47c0 | 473 | if (!prepare_commit_graph(r)) |
ee797053 | 474 | return 0; |
4f542b7a | 475 | return parse_commit_in_graph_one(r, r->objects->commit_graph, item); |
177722b3 DS |
476 | } |
477 | ||
dade47c0 | 478 | void load_commit_graph_info(struct repository *r, struct commit *item) |
e2838d85 DS |
479 | { |
480 | uint32_t pos; | |
dade47c0 | 481 | if (!prepare_commit_graph(r)) |
e2838d85 | 482 | return; |
dade47c0 JT |
483 | if (find_commit_in_graph(item, r->objects->commit_graph, &pos)) |
484 | fill_commit_graph_info(item, r->objects->commit_graph, pos); | |
e2838d85 DS |
485 | } |
486 | ||
4f542b7a SB |
487 | static struct tree *load_tree_for_commit(struct repository *r, |
488 | struct commit_graph *g, | |
489 | struct commit *c) | |
7b8a21db DS |
490 | { |
491 | struct object_id oid; | |
492 | const unsigned char *commit_data = g->chunk_commit_data + | |
493 | GRAPH_DATA_WIDTH * (c->graph_pos); | |
494 | ||
495 | hashcpy(oid.hash, commit_data); | |
4f542b7a | 496 | c->maybe_tree = lookup_tree(r, &oid); |
7b8a21db DS |
497 | |
498 | return c->maybe_tree; | |
499 | } | |
500 | ||
4f542b7a SB |
501 | static struct tree *get_commit_tree_in_graph_one(struct repository *r, |
502 | struct commit_graph *g, | |
0cbef8f8 | 503 | const struct commit *c) |
7b8a21db DS |
504 | { |
505 | if (c->maybe_tree) | |
506 | return c->maybe_tree; | |
507 | if (c->graph_pos == COMMIT_NOT_FROM_GRAPH) | |
0cbef8f8 DS |
508 | BUG("get_commit_tree_in_graph_one called from non-commit-graph commit"); |
509 | ||
4f542b7a | 510 | return load_tree_for_commit(r, g, (struct commit *)c); |
0cbef8f8 | 511 | } |
7b8a21db | 512 | |
dade47c0 | 513 | struct tree *get_commit_tree_in_graph(struct repository *r, const struct commit *c) |
0cbef8f8 | 514 | { |
4f542b7a | 515 | return get_commit_tree_in_graph_one(r, r->objects->commit_graph, c); |
7b8a21db DS |
516 | } |
517 | ||
08fd81c9 DS |
518 | static void write_graph_chunk_fanout(struct hashfile *f, |
519 | struct commit **commits, | |
53035c4f ÆAB |
520 | int nr_commits, |
521 | struct progress *progress, | |
522 | uint64_t *progress_cnt) | |
08fd81c9 DS |
523 | { |
524 | int i, count = 0; | |
525 | struct commit **list = commits; | |
526 | ||
527 | /* | |
528 | * Write the first-level table (the list is sorted, | |
529 | * but we use a 256-entry lookup to be able to avoid | |
530 | * having to do eight extra binary search iterations). | |
531 | */ | |
532 | for (i = 0; i < 256; i++) { | |
533 | while (count < nr_commits) { | |
534 | if ((*list)->object.oid.hash[0] != i) | |
535 | break; | |
53035c4f | 536 | display_progress(progress, ++*progress_cnt); |
08fd81c9 DS |
537 | count++; |
538 | list++; | |
539 | } | |
540 | ||
541 | hashwrite_be32(f, count); | |
542 | } | |
543 | } | |
544 | ||
545 | static void write_graph_chunk_oids(struct hashfile *f, int hash_len, | |
53035c4f ÆAB |
546 | struct commit **commits, int nr_commits, |
547 | struct progress *progress, | |
548 | uint64_t *progress_cnt) | |
08fd81c9 DS |
549 | { |
550 | struct commit **list = commits; | |
551 | int count; | |
53035c4f ÆAB |
552 | for (count = 0; count < nr_commits; count++, list++) { |
553 | display_progress(progress, ++*progress_cnt); | |
08fd81c9 | 554 | hashwrite(f, (*list)->object.oid.hash, (int)hash_len); |
53035c4f | 555 | } |
08fd81c9 DS |
556 | } |
557 | ||
558 | static const unsigned char *commit_to_sha1(size_t index, void *table) | |
559 | { | |
560 | struct commit **commits = table; | |
561 | return commits[index]->object.oid.hash; | |
562 | } | |
563 | ||
564 | static void write_graph_chunk_data(struct hashfile *f, int hash_len, | |
53035c4f ÆAB |
565 | struct commit **commits, int nr_commits, |
566 | struct progress *progress, | |
567 | uint64_t *progress_cnt) | |
08fd81c9 DS |
568 | { |
569 | struct commit **list = commits; | |
570 | struct commit **last = commits + nr_commits; | |
571 | uint32_t num_extra_edges = 0; | |
572 | ||
573 | while (list < last) { | |
574 | struct commit_list *parent; | |
575 | int edge_value; | |
576 | uint32_t packedDate[2]; | |
53035c4f | 577 | display_progress(progress, ++*progress_cnt); |
08fd81c9 DS |
578 | |
579 | parse_commit(*list); | |
2e27bd77 | 580 | hashwrite(f, get_commit_tree_oid(*list)->hash, hash_len); |
08fd81c9 DS |
581 | |
582 | parent = (*list)->parents; | |
583 | ||
584 | if (!parent) | |
585 | edge_value = GRAPH_PARENT_NONE; | |
586 | else { | |
587 | edge_value = sha1_pos(parent->item->object.oid.hash, | |
588 | commits, | |
589 | nr_commits, | |
590 | commit_to_sha1); | |
591 | ||
592 | if (edge_value < 0) | |
cce99cd8 DS |
593 | BUG("missing parent %s for commit %s", |
594 | oid_to_hex(&parent->item->object.oid), | |
595 | oid_to_hex(&(*list)->object.oid)); | |
08fd81c9 DS |
596 | } |
597 | ||
598 | hashwrite_be32(f, edge_value); | |
599 | ||
600 | if (parent) | |
601 | parent = parent->next; | |
602 | ||
603 | if (!parent) | |
604 | edge_value = GRAPH_PARENT_NONE; | |
605 | else if (parent->next) | |
5af7417b | 606 | edge_value = GRAPH_EXTRA_EDGES_NEEDED | num_extra_edges; |
08fd81c9 DS |
607 | else { |
608 | edge_value = sha1_pos(parent->item->object.oid.hash, | |
609 | commits, | |
610 | nr_commits, | |
611 | commit_to_sha1); | |
612 | if (edge_value < 0) | |
cce99cd8 DS |
613 | BUG("missing parent %s for commit %s", |
614 | oid_to_hex(&parent->item->object.oid), | |
615 | oid_to_hex(&(*list)->object.oid)); | |
08fd81c9 DS |
616 | } |
617 | ||
618 | hashwrite_be32(f, edge_value); | |
619 | ||
5af7417b | 620 | if (edge_value & GRAPH_EXTRA_EDGES_NEEDED) { |
08fd81c9 DS |
621 | do { |
622 | num_extra_edges++; | |
623 | parent = parent->next; | |
624 | } while (parent); | |
625 | } | |
626 | ||
627 | if (sizeof((*list)->date) > 4) | |
628 | packedDate[0] = htonl(((*list)->date >> 32) & 0x3); | |
629 | else | |
630 | packedDate[0] = 0; | |
631 | ||
3258c663 DS |
632 | packedDate[0] |= htonl((*list)->generation << 2); |
633 | ||
08fd81c9 DS |
634 | packedDate[1] = htonl((*list)->date); |
635 | hashwrite(f, packedDate, 8); | |
636 | ||
637 | list++; | |
638 | } | |
639 | } | |
640 | ||
5af7417b | 641 | static void write_graph_chunk_extra_edges(struct hashfile *f, |
08fd81c9 | 642 | struct commit **commits, |
53035c4f ÆAB |
643 | int nr_commits, |
644 | struct progress *progress, | |
645 | uint64_t *progress_cnt) | |
08fd81c9 DS |
646 | { |
647 | struct commit **list = commits; | |
648 | struct commit **last = commits + nr_commits; | |
649 | struct commit_list *parent; | |
650 | ||
651 | while (list < last) { | |
652 | int num_parents = 0; | |
53035c4f ÆAB |
653 | |
654 | display_progress(progress, ++*progress_cnt); | |
655 | ||
08fd81c9 DS |
656 | for (parent = (*list)->parents; num_parents < 3 && parent; |
657 | parent = parent->next) | |
658 | num_parents++; | |
659 | ||
660 | if (num_parents <= 2) { | |
661 | list++; | |
662 | continue; | |
663 | } | |
664 | ||
665 | /* Since num_parents > 2, this initializer is safe. */ | |
666 | for (parent = (*list)->parents->next; parent; parent = parent->next) { | |
667 | int edge_value = sha1_pos(parent->item->object.oid.hash, | |
668 | commits, | |
669 | nr_commits, | |
670 | commit_to_sha1); | |
671 | ||
672 | if (edge_value < 0) | |
cce99cd8 DS |
673 | BUG("missing parent %s for commit %s", |
674 | oid_to_hex(&parent->item->object.oid), | |
675 | oid_to_hex(&(*list)->object.oid)); | |
08fd81c9 DS |
676 | else if (!parent->next) |
677 | edge_value |= GRAPH_LAST_EDGE; | |
678 | ||
679 | hashwrite_be32(f, edge_value); | |
680 | } | |
681 | ||
682 | list++; | |
683 | } | |
684 | } | |
685 | ||
686 | static int commit_compare(const void *_a, const void *_b) | |
687 | { | |
688 | const struct object_id *a = (const struct object_id *)_a; | |
689 | const struct object_id *b = (const struct object_id *)_b; | |
690 | return oidcmp(a, b); | |
691 | } | |
692 | ||
693 | struct packed_commit_list { | |
694 | struct commit **list; | |
695 | int nr; | |
696 | int alloc; | |
697 | }; | |
698 | ||
699 | struct packed_oid_list { | |
700 | struct object_id *list; | |
701 | int nr; | |
702 | int alloc; | |
7b0f2292 ÆAB |
703 | struct progress *progress; |
704 | int progress_done; | |
08fd81c9 DS |
705 | }; |
706 | ||
707 | static int add_packed_commits(const struct object_id *oid, | |
708 | struct packed_git *pack, | |
709 | uint32_t pos, | |
710 | void *data) | |
711 | { | |
712 | struct packed_oid_list *list = (struct packed_oid_list*)data; | |
713 | enum object_type type; | |
714 | off_t offset = nth_packed_object_offset(pack, pos); | |
715 | struct object_info oi = OBJECT_INFO_INIT; | |
716 | ||
7b0f2292 ÆAB |
717 | if (list->progress) |
718 | display_progress(list->progress, ++list->progress_done); | |
719 | ||
08fd81c9 | 720 | oi.typep = &type; |
fcb6df32 | 721 | if (packed_object_info(the_repository, pack, offset, &oi) < 0) |
4f5b532d | 722 | die(_("unable to get type of object %s"), oid_to_hex(oid)); |
08fd81c9 DS |
723 | |
724 | if (type != OBJ_COMMIT) | |
725 | return 0; | |
726 | ||
727 | ALLOC_GROW(list->list, list->nr + 1, list->alloc); | |
728 | oidcpy(&(list->list[list->nr]), oid); | |
729 | list->nr++; | |
730 | ||
731 | return 0; | |
732 | } | |
733 | ||
4f2542b4 DS |
734 | static void add_missing_parents(struct packed_oid_list *oids, struct commit *commit) |
735 | { | |
736 | struct commit_list *parent; | |
737 | for (parent = commit->parents; parent; parent = parent->next) { | |
738 | if (!(parent->item->object.flags & UNINTERESTING)) { | |
739 | ALLOC_GROW(oids->list, oids->nr + 1, oids->alloc); | |
740 | oidcpy(&oids->list[oids->nr], &(parent->item->object.oid)); | |
741 | oids->nr++; | |
742 | parent->item->object.flags |= UNINTERESTING; | |
743 | } | |
744 | } | |
745 | } | |
746 | ||
7b0f2292 | 747 | static void close_reachable(struct packed_oid_list *oids, int report_progress) |
4f2542b4 | 748 | { |
49bbc57a | 749 | int i; |
4f2542b4 | 750 | struct commit *commit; |
7b0f2292 | 751 | struct progress *progress = NULL; |
4f2542b4 | 752 | |
7b0f2292 ÆAB |
753 | if (report_progress) |
754 | progress = start_delayed_progress( | |
49bbc57a | 755 | _("Loading known commits in commit graph"), oids->nr); |
4f2542b4 | 756 | for (i = 0; i < oids->nr; i++) { |
49bbc57a | 757 | display_progress(progress, i + 1); |
c1f5eb49 | 758 | commit = lookup_commit(the_repository, &oids->list[i]); |
4f2542b4 DS |
759 | if (commit) |
760 | commit->object.flags |= UNINTERESTING; | |
761 | } | |
01ca3877 | 762 | stop_progress(&progress); |
4f2542b4 DS |
763 | |
764 | /* | |
765 | * As this loop runs, oids->nr may grow, but not more | |
766 | * than the number of missing commits in the reachable | |
767 | * closure. | |
768 | */ | |
01ca3877 ÆAB |
769 | if (report_progress) |
770 | progress = start_delayed_progress( | |
49bbc57a | 771 | _("Expanding reachable commits in commit graph"), oids->nr); |
4f2542b4 | 772 | for (i = 0; i < oids->nr; i++) { |
49bbc57a | 773 | display_progress(progress, i + 1); |
c1f5eb49 | 774 | commit = lookup_commit(the_repository, &oids->list[i]); |
4f2542b4 DS |
775 | |
776 | if (commit && !parse_commit(commit)) | |
777 | add_missing_parents(oids, commit); | |
778 | } | |
01ca3877 | 779 | stop_progress(&progress); |
4f2542b4 | 780 | |
01ca3877 ÆAB |
781 | if (report_progress) |
782 | progress = start_delayed_progress( | |
49bbc57a | 783 | _("Clearing commit marks in commit graph"), oids->nr); |
4f2542b4 | 784 | for (i = 0; i < oids->nr; i++) { |
49bbc57a | 785 | display_progress(progress, i + 1); |
c1f5eb49 | 786 | commit = lookup_commit(the_repository, &oids->list[i]); |
4f2542b4 DS |
787 | |
788 | if (commit) | |
789 | commit->object.flags &= ~UNINTERESTING; | |
790 | } | |
7b0f2292 | 791 | stop_progress(&progress); |
4f2542b4 DS |
792 | } |
793 | ||
7b0f2292 ÆAB |
794 | static void compute_generation_numbers(struct packed_commit_list* commits, |
795 | int report_progress) | |
3258c663 DS |
796 | { |
797 | int i; | |
798 | struct commit_list *list = NULL; | |
7b0f2292 | 799 | struct progress *progress = NULL; |
3258c663 | 800 | |
7b0f2292 ÆAB |
801 | if (report_progress) |
802 | progress = start_progress( | |
803 | _("Computing commit graph generation numbers"), | |
804 | commits->nr); | |
3258c663 | 805 | for (i = 0; i < commits->nr; i++) { |
7b0f2292 | 806 | display_progress(progress, i + 1); |
3258c663 DS |
807 | if (commits->list[i]->generation != GENERATION_NUMBER_INFINITY && |
808 | commits->list[i]->generation != GENERATION_NUMBER_ZERO) | |
809 | continue; | |
810 | ||
811 | commit_list_insert(commits->list[i], &list); | |
812 | while (list) { | |
813 | struct commit *current = list->item; | |
814 | struct commit_list *parent; | |
815 | int all_parents_computed = 1; | |
816 | uint32_t max_generation = 0; | |
817 | ||
818 | for (parent = current->parents; parent; parent = parent->next) { | |
819 | if (parent->item->generation == GENERATION_NUMBER_INFINITY || | |
820 | parent->item->generation == GENERATION_NUMBER_ZERO) { | |
821 | all_parents_computed = 0; | |
822 | commit_list_insert(parent->item, &list); | |
823 | break; | |
824 | } else if (parent->item->generation > max_generation) { | |
825 | max_generation = parent->item->generation; | |
826 | } | |
827 | } | |
828 | ||
829 | if (all_parents_computed) { | |
830 | current->generation = max_generation + 1; | |
831 | pop_commit(&list); | |
832 | ||
833 | if (current->generation > GENERATION_NUMBER_MAX) | |
834 | current->generation = GENERATION_NUMBER_MAX; | |
835 | } | |
836 | } | |
837 | } | |
7b0f2292 | 838 | stop_progress(&progress); |
3258c663 DS |
839 | } |
840 | ||
59fb8770 DS |
841 | static int add_ref_to_list(const char *refname, |
842 | const struct object_id *oid, | |
843 | int flags, void *cb_data) | |
844 | { | |
845 | struct string_list *list = (struct string_list *)cb_data; | |
846 | ||
847 | string_list_append(list, oid_to_hex(oid)); | |
848 | return 0; | |
849 | } | |
850 | ||
7b0f2292 ÆAB |
851 | void write_commit_graph_reachable(const char *obj_dir, int append, |
852 | int report_progress) | |
59fb8770 | 853 | { |
f4dbdfc4 | 854 | struct string_list list = STRING_LIST_INIT_DUP; |
59fb8770 | 855 | |
59fb8770 | 856 | for_each_ref(add_ref_to_list, &list); |
7b0f2292 | 857 | write_commit_graph(obj_dir, NULL, &list, append, report_progress); |
f4dbdfc4 DS |
858 | |
859 | string_list_clear(&list, 0); | |
59fb8770 DS |
860 | } |
861 | ||
049d51a2 | 862 | void write_commit_graph(const char *obj_dir, |
d88b14b3 DS |
863 | struct string_list *pack_indexes, |
864 | struct string_list *commit_hex, | |
7b0f2292 | 865 | int append, int report_progress) |
08fd81c9 DS |
866 | { |
867 | struct packed_oid_list oids; | |
868 | struct packed_commit_list commits; | |
869 | struct hashfile *f; | |
870 | uint32_t i, count_distinct = 0; | |
871 | char *graph_name; | |
08fd81c9 DS |
872 | struct lock_file lk = LOCK_INIT; |
873 | uint32_t chunk_ids[5]; | |
874 | uint64_t chunk_offsets[5]; | |
875 | int num_chunks; | |
876 | int num_extra_edges; | |
877 | struct commit_list *parent; | |
7b0f2292 | 878 | struct progress *progress = NULL; |
c1665998 | 879 | const unsigned hashsz = the_hash_algo->rawsz; |
53035c4f | 880 | uint64_t progress_cnt = 0; |
28944739 | 881 | struct strbuf progress_title = STRBUF_INIT; |
d9b1b309 | 882 | unsigned long approx_nr_objects; |
08fd81c9 | 883 | |
d6538246 DS |
884 | if (!commit_graph_compatible(the_repository)) |
885 | return; | |
886 | ||
08fd81c9 | 887 | oids.nr = 0; |
d9b1b309 ÆAB |
888 | approx_nr_objects = approximate_object_count(); |
889 | oids.alloc = approx_nr_objects / 32; | |
7b0f2292 ÆAB |
890 | oids.progress = NULL; |
891 | oids.progress_done = 0; | |
08fd81c9 | 892 | |
7547b95b | 893 | if (append) { |
dade47c0 | 894 | prepare_commit_graph_one(the_repository, obj_dir); |
85277506 JT |
895 | if (the_repository->objects->commit_graph) |
896 | oids.alloc += the_repository->objects->commit_graph->num_commits; | |
7547b95b DS |
897 | } |
898 | ||
08fd81c9 DS |
899 | if (oids.alloc < 1024) |
900 | oids.alloc = 1024; | |
901 | ALLOC_ARRAY(oids.list, oids.alloc); | |
902 | ||
85277506 JT |
903 | if (append && the_repository->objects->commit_graph) { |
904 | struct commit_graph *commit_graph = | |
905 | the_repository->objects->commit_graph; | |
7547b95b DS |
906 | for (i = 0; i < commit_graph->num_commits; i++) { |
907 | const unsigned char *hash = commit_graph->chunk_oid_lookup + | |
908 | commit_graph->hash_len * i; | |
909 | hashcpy(oids.list[oids.nr++].hash, hash); | |
910 | } | |
911 | } | |
912 | ||
049d51a2 DS |
913 | if (pack_indexes) { |
914 | struct strbuf packname = STRBUF_INIT; | |
915 | int dirlen; | |
916 | strbuf_addf(&packname, "%s/pack/", obj_dir); | |
917 | dirlen = packname.len; | |
7b0f2292 | 918 | if (report_progress) { |
7c7b8a7f ÆAB |
919 | strbuf_addf(&progress_title, |
920 | Q_("Finding commits for commit graph in %d pack", | |
921 | "Finding commits for commit graph in %d packs", | |
922 | pack_indexes->nr), | |
923 | pack_indexes->nr); | |
924 | oids.progress = start_delayed_progress(progress_title.buf, 0); | |
7b0f2292 ÆAB |
925 | oids.progress_done = 0; |
926 | } | |
d88b14b3 | 927 | for (i = 0; i < pack_indexes->nr; i++) { |
049d51a2 DS |
928 | struct packed_git *p; |
929 | strbuf_setlen(&packname, dirlen); | |
d88b14b3 | 930 | strbuf_addstr(&packname, pack_indexes->items[i].string); |
049d51a2 DS |
931 | p = add_packed_git(packname.buf, packname.len, 1); |
932 | if (!p) | |
4f5b532d | 933 | die(_("error adding pack %s"), packname.buf); |
049d51a2 | 934 | if (open_pack_index(p)) |
4f5b532d | 935 | die(_("error opening index for %s"), packname.buf); |
d7574c95 ÆAB |
936 | for_each_object_in_pack(p, add_packed_commits, &oids, |
937 | FOR_EACH_OBJECT_PACK_ORDER); | |
049d51a2 | 938 | close_pack(p); |
f4dbdfc4 | 939 | free(p); |
049d51a2 | 940 | } |
7b0f2292 | 941 | stop_progress(&oids.progress); |
7c7b8a7f | 942 | strbuf_reset(&progress_title); |
049d51a2 | 943 | strbuf_release(&packname); |
3d5df01b DS |
944 | } |
945 | ||
946 | if (commit_hex) { | |
7c7b8a7f ÆAB |
947 | if (report_progress) { |
948 | strbuf_addf(&progress_title, | |
949 | Q_("Finding commits for commit graph from %d ref", | |
950 | "Finding commits for commit graph from %d refs", | |
951 | commit_hex->nr), | |
952 | commit_hex->nr); | |
953 | progress = start_delayed_progress(progress_title.buf, | |
954 | commit_hex->nr); | |
955 | } | |
d88b14b3 | 956 | for (i = 0; i < commit_hex->nr; i++) { |
3d5df01b DS |
957 | const char *end; |
958 | struct object_id oid; | |
959 | struct commit *result; | |
960 | ||
7b0f2292 | 961 | display_progress(progress, i + 1); |
d88b14b3 DS |
962 | if (commit_hex->items[i].string && |
963 | parse_oid_hex(commit_hex->items[i].string, &oid, &end)) | |
3d5df01b DS |
964 | continue; |
965 | ||
21e1ee8f | 966 | result = lookup_commit_reference_gently(the_repository, &oid, 1); |
3d5df01b DS |
967 | |
968 | if (result) { | |
969 | ALLOC_GROW(oids.list, oids.nr + 1, oids.alloc); | |
970 | oidcpy(&oids.list[oids.nr], &(result->object.oid)); | |
971 | oids.nr++; | |
972 | } | |
973 | } | |
7b0f2292 | 974 | stop_progress(&progress); |
7c7b8a7f | 975 | strbuf_reset(&progress_title); |
3d5df01b DS |
976 | } |
977 | ||
7b0f2292 ÆAB |
978 | if (!pack_indexes && !commit_hex) { |
979 | if (report_progress) | |
980 | oids.progress = start_delayed_progress( | |
7c7b8a7f | 981 | _("Finding commits for commit graph among packed objects"), |
d9b1b309 | 982 | approx_nr_objects); |
d7574c95 ÆAB |
983 | for_each_packed_object(add_packed_commits, &oids, |
984 | FOR_EACH_OBJECT_PACK_ORDER); | |
d9b1b309 ÆAB |
985 | if (oids.progress_done < approx_nr_objects) |
986 | display_progress(oids.progress, approx_nr_objects); | |
7b0f2292 ÆAB |
987 | stop_progress(&oids.progress); |
988 | } | |
049d51a2 | 989 | |
7b0f2292 | 990 | close_reachable(&oids, report_progress); |
08fd81c9 | 991 | |
890226cc ÆAB |
992 | if (report_progress) |
993 | progress = start_delayed_progress( | |
994 | _("Counting distinct commits in commit graph"), | |
995 | oids.nr); | |
996 | display_progress(progress, 0); /* TODO: Measure QSORT() progress */ | |
08fd81c9 | 997 | QSORT(oids.list, oids.nr, commit_compare); |
08fd81c9 DS |
998 | count_distinct = 1; |
999 | for (i = 1; i < oids.nr; i++) { | |
890226cc | 1000 | display_progress(progress, i + 1); |
9001dc2a | 1001 | if (!oideq(&oids.list[i - 1], &oids.list[i])) |
08fd81c9 DS |
1002 | count_distinct++; |
1003 | } | |
890226cc | 1004 | stop_progress(&progress); |
08fd81c9 | 1005 | |
cce99cd8 | 1006 | if (count_distinct >= GRAPH_EDGE_LAST_MASK) |
08fd81c9 DS |
1007 | die(_("the commit graph format cannot write %d commits"), count_distinct); |
1008 | ||
1009 | commits.nr = 0; | |
1010 | commits.alloc = count_distinct; | |
1011 | ALLOC_ARRAY(commits.list, commits.alloc); | |
1012 | ||
1013 | num_extra_edges = 0; | |
890226cc ÆAB |
1014 | if (report_progress) |
1015 | progress = start_delayed_progress( | |
1016 | _("Finding extra edges in commit graph"), | |
1017 | oids.nr); | |
08fd81c9 DS |
1018 | for (i = 0; i < oids.nr; i++) { |
1019 | int num_parents = 0; | |
890226cc | 1020 | display_progress(progress, i + 1); |
4a7e27e9 | 1021 | if (i > 0 && oideq(&oids.list[i - 1], &oids.list[i])) |
08fd81c9 DS |
1022 | continue; |
1023 | ||
c1f5eb49 | 1024 | commits.list[commits.nr] = lookup_commit(the_repository, &oids.list[i]); |
08fd81c9 DS |
1025 | parse_commit(commits.list[commits.nr]); |
1026 | ||
1027 | for (parent = commits.list[commits.nr]->parents; | |
1028 | parent; parent = parent->next) | |
1029 | num_parents++; | |
1030 | ||
1031 | if (num_parents > 2) | |
1032 | num_extra_edges += num_parents - 1; | |
1033 | ||
1034 | commits.nr++; | |
1035 | } | |
1036 | num_chunks = num_extra_edges ? 4 : 3; | |
890226cc | 1037 | stop_progress(&progress); |
08fd81c9 | 1038 | |
cce99cd8 | 1039 | if (commits.nr >= GRAPH_EDGE_LAST_MASK) |
08fd81c9 DS |
1040 | die(_("too many commits to write graph")); |
1041 | ||
7b0f2292 | 1042 | compute_generation_numbers(&commits, report_progress); |
08fd81c9 | 1043 | |
08fd81c9 | 1044 | graph_name = get_commit_graph_filename(obj_dir); |
f4dbdfc4 DS |
1045 | if (safe_create_leading_directories(graph_name)) { |
1046 | UNLEAK(graph_name); | |
33286dcd DS |
1047 | die_errno(_("unable to create leading directories of %s"), |
1048 | graph_name); | |
f4dbdfc4 | 1049 | } |
08fd81c9 | 1050 | |
33286dcd | 1051 | hold_lock_file_for_update(&lk, graph_name, LOCK_DIE_ON_ERROR); |
08fd81c9 DS |
1052 | f = hashfd(lk.tempfile->fd, lk.tempfile->filename.buf); |
1053 | ||
1054 | hashwrite_be32(f, GRAPH_SIGNATURE); | |
1055 | ||
1056 | hashwrite_u8(f, GRAPH_VERSION); | |
c1665998 | 1057 | hashwrite_u8(f, oid_version()); |
08fd81c9 DS |
1058 | hashwrite_u8(f, num_chunks); |
1059 | hashwrite_u8(f, 0); /* unused padding byte */ | |
1060 | ||
1061 | chunk_ids[0] = GRAPH_CHUNKID_OIDFANOUT; | |
1062 | chunk_ids[1] = GRAPH_CHUNKID_OIDLOOKUP; | |
1063 | chunk_ids[2] = GRAPH_CHUNKID_DATA; | |
1064 | if (num_extra_edges) | |
5af7417b | 1065 | chunk_ids[3] = GRAPH_CHUNKID_EXTRAEDGES; |
08fd81c9 DS |
1066 | else |
1067 | chunk_ids[3] = 0; | |
1068 | chunk_ids[4] = 0; | |
1069 | ||
1070 | chunk_offsets[0] = 8 + (num_chunks + 1) * GRAPH_CHUNKLOOKUP_WIDTH; | |
1071 | chunk_offsets[1] = chunk_offsets[0] + GRAPH_FANOUT_SIZE; | |
c1665998 | 1072 | chunk_offsets[2] = chunk_offsets[1] + hashsz * commits.nr; |
1073 | chunk_offsets[3] = chunk_offsets[2] + (hashsz + 16) * commits.nr; | |
08fd81c9 DS |
1074 | chunk_offsets[4] = chunk_offsets[3] + 4 * num_extra_edges; |
1075 | ||
1076 | for (i = 0; i <= num_chunks; i++) { | |
1077 | uint32_t chunk_write[3]; | |
1078 | ||
1079 | chunk_write[0] = htonl(chunk_ids[i]); | |
1080 | chunk_write[1] = htonl(chunk_offsets[i] >> 32); | |
1081 | chunk_write[2] = htonl(chunk_offsets[i] & 0xffffffff); | |
1082 | hashwrite(f, chunk_write, 12); | |
1083 | } | |
1084 | ||
28944739 ÆAB |
1085 | if (report_progress) { |
1086 | strbuf_addf(&progress_title, | |
1087 | Q_("Writing out commit graph in %d pass", | |
1088 | "Writing out commit graph in %d passes", | |
1089 | num_chunks), | |
1090 | num_chunks); | |
53035c4f | 1091 | progress = start_delayed_progress( |
28944739 | 1092 | progress_title.buf, |
53035c4f | 1093 | num_chunks * commits.nr); |
28944739 | 1094 | } |
53035c4f | 1095 | write_graph_chunk_fanout(f, commits.list, commits.nr, progress, &progress_cnt); |
e5eac573 JH |
1096 | write_graph_chunk_oids(f, hashsz, commits.list, commits.nr, progress, &progress_cnt); |
1097 | write_graph_chunk_data(f, hashsz, commits.list, commits.nr, progress, &progress_cnt); | |
857ba928 | 1098 | if (num_extra_edges) |
53035c4f ÆAB |
1099 | write_graph_chunk_extra_edges(f, commits.list, commits.nr, progress, &progress_cnt); |
1100 | stop_progress(&progress); | |
28944739 | 1101 | strbuf_release(&progress_title); |
08fd81c9 | 1102 | |
829a3215 | 1103 | close_commit_graph(the_repository); |
08fd81c9 DS |
1104 | finalize_hashfile(f, NULL, CSUM_HASH_IN_STREAM | CSUM_FSYNC); |
1105 | commit_lock_file(&lk); | |
1106 | ||
f4dbdfc4 DS |
1107 | free(graph_name); |
1108 | free(commits.list); | |
08fd81c9 | 1109 | free(oids.list); |
08fd81c9 | 1110 | } |
283e68c7 | 1111 | |
41df0e30 | 1112 | #define VERIFY_COMMIT_GRAPH_ERROR_HASH 2 |
283e68c7 DS |
1113 | static int verify_commit_graph_error; |
1114 | ||
1115 | static void graph_report(const char *fmt, ...) | |
1116 | { | |
1117 | va_list ap; | |
1118 | ||
1119 | verify_commit_graph_error = 1; | |
1120 | va_start(ap, fmt); | |
1121 | vfprintf(stderr, fmt, ap); | |
1122 | fprintf(stderr, "\n"); | |
1123 | va_end(ap); | |
1124 | } | |
1125 | ||
1373e547 DS |
1126 | #define GENERATION_ZERO_EXISTS 1 |
1127 | #define GENERATION_NUMBER_EXISTS 2 | |
1128 | ||
283e68c7 DS |
1129 | int verify_commit_graph(struct repository *r, struct commit_graph *g) |
1130 | { | |
9bda8467 | 1131 | uint32_t i, cur_fanout_pos = 0; |
41df0e30 | 1132 | struct object_id prev_oid, cur_oid, checksum; |
1373e547 | 1133 | int generation_zero = 0; |
41df0e30 DS |
1134 | struct hashfile *f; |
1135 | int devnull; | |
1f7f557f | 1136 | struct progress *progress = NULL; |
9bda8467 | 1137 | |
283e68c7 DS |
1138 | if (!g) { |
1139 | graph_report("no commit-graph file loaded"); | |
1140 | return 1; | |
1141 | } | |
1142 | ||
2ac138d5 | 1143 | verify_commit_graph_error = verify_commit_graph_lite(g); |
9bda8467 DS |
1144 | if (verify_commit_graph_error) |
1145 | return verify_commit_graph_error; | |
1146 | ||
41df0e30 DS |
1147 | devnull = open("/dev/null", O_WRONLY); |
1148 | f = hashfd(devnull, NULL); | |
1149 | hashwrite(f, g->data, g->data_len - g->hash_len); | |
1150 | finalize_hashfile(f, checksum.hash, CSUM_CLOSE); | |
67947c34 | 1151 | if (!hasheq(checksum.hash, g->data + g->data_len - g->hash_len)) { |
41df0e30 DS |
1152 | graph_report(_("the commit-graph file has incorrect checksum and is likely corrupt")); |
1153 | verify_commit_graph_error = VERIFY_COMMIT_GRAPH_ERROR_HASH; | |
1154 | } | |
1155 | ||
9bda8467 | 1156 | for (i = 0; i < g->num_commits; i++) { |
2e3c0737 DS |
1157 | struct commit *graph_commit; |
1158 | ||
9bda8467 DS |
1159 | hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i); |
1160 | ||
1161 | if (i && oidcmp(&prev_oid, &cur_oid) >= 0) | |
1162 | graph_report("commit-graph has incorrect OID order: %s then %s", | |
1163 | oid_to_hex(&prev_oid), | |
1164 | oid_to_hex(&cur_oid)); | |
1165 | ||
1166 | oidcpy(&prev_oid, &cur_oid); | |
1167 | ||
1168 | while (cur_oid.hash[0] > cur_fanout_pos) { | |
1169 | uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos); | |
1170 | ||
1171 | if (i != fanout_value) | |
1172 | graph_report("commit-graph has incorrect fanout value: fanout[%d] = %u != %u", | |
1173 | cur_fanout_pos, fanout_value, i); | |
1174 | cur_fanout_pos++; | |
1175 | } | |
2e3c0737 | 1176 | |
82952964 | 1177 | graph_commit = lookup_commit(r, &cur_oid); |
4f542b7a | 1178 | if (!parse_commit_in_graph_one(r, g, graph_commit)) |
2e3c0737 DS |
1179 | graph_report("failed to parse %s from commit-graph", |
1180 | oid_to_hex(&cur_oid)); | |
9bda8467 DS |
1181 | } |
1182 | ||
1183 | while (cur_fanout_pos < 256) { | |
1184 | uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos); | |
1185 | ||
1186 | if (g->num_commits != fanout_value) | |
1187 | graph_report("commit-graph has incorrect fanout value: fanout[%d] = %u != %u", | |
1188 | cur_fanout_pos, fanout_value, i); | |
1189 | ||
1190 | cur_fanout_pos++; | |
1191 | } | |
1192 | ||
41df0e30 | 1193 | if (verify_commit_graph_error & ~VERIFY_COMMIT_GRAPH_ERROR_HASH) |
96af91d4 DS |
1194 | return verify_commit_graph_error; |
1195 | ||
1f7f557f ÆAB |
1196 | progress = start_progress(_("Verifying commits in commit graph"), |
1197 | g->num_commits); | |
96af91d4 | 1198 | for (i = 0; i < g->num_commits; i++) { |
2e3c0737 | 1199 | struct commit *graph_commit, *odb_commit; |
53614b13 | 1200 | struct commit_list *graph_parents, *odb_parents; |
1373e547 | 1201 | uint32_t max_generation = 0; |
96af91d4 | 1202 | |
1f7f557f | 1203 | display_progress(progress, i + 1); |
96af91d4 DS |
1204 | hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i); |
1205 | ||
82952964 | 1206 | graph_commit = lookup_commit(r, &cur_oid); |
96af91d4 DS |
1207 | odb_commit = (struct commit *)create_object(r, cur_oid.hash, alloc_commit_node(r)); |
1208 | if (parse_commit_internal(odb_commit, 0, 0)) { | |
1209 | graph_report("failed to parse %s from object database", | |
1210 | oid_to_hex(&cur_oid)); | |
1211 | continue; | |
1212 | } | |
2e3c0737 | 1213 | |
4f542b7a | 1214 | if (!oideq(&get_commit_tree_in_graph_one(r, g, graph_commit)->object.oid, |
2e3c0737 DS |
1215 | get_commit_tree_oid(odb_commit))) |
1216 | graph_report("root tree OID for commit %s in commit-graph is %s != %s", | |
1217 | oid_to_hex(&cur_oid), | |
1218 | oid_to_hex(get_commit_tree_oid(graph_commit)), | |
1219 | oid_to_hex(get_commit_tree_oid(odb_commit))); | |
53614b13 DS |
1220 | |
1221 | graph_parents = graph_commit->parents; | |
1222 | odb_parents = odb_commit->parents; | |
1223 | ||
1224 | while (graph_parents) { | |
1225 | if (odb_parents == NULL) { | |
1226 | graph_report("commit-graph parent list for commit %s is too long", | |
1227 | oid_to_hex(&cur_oid)); | |
1228 | break; | |
1229 | } | |
1230 | ||
9001dc2a | 1231 | if (!oideq(&graph_parents->item->object.oid, &odb_parents->item->object.oid)) |
53614b13 DS |
1232 | graph_report("commit-graph parent for %s is %s != %s", |
1233 | oid_to_hex(&cur_oid), | |
1234 | oid_to_hex(&graph_parents->item->object.oid), | |
1235 | oid_to_hex(&odb_parents->item->object.oid)); | |
1236 | ||
1373e547 DS |
1237 | if (graph_parents->item->generation > max_generation) |
1238 | max_generation = graph_parents->item->generation; | |
1239 | ||
53614b13 DS |
1240 | graph_parents = graph_parents->next; |
1241 | odb_parents = odb_parents->next; | |
1242 | } | |
1243 | ||
1244 | if (odb_parents != NULL) | |
1245 | graph_report("commit-graph parent list for commit %s terminates early", | |
1246 | oid_to_hex(&cur_oid)); | |
1373e547 DS |
1247 | |
1248 | if (!graph_commit->generation) { | |
1249 | if (generation_zero == GENERATION_NUMBER_EXISTS) | |
1250 | graph_report("commit-graph has generation number zero for commit %s, but non-zero elsewhere", | |
1251 | oid_to_hex(&cur_oid)); | |
1252 | generation_zero = GENERATION_ZERO_EXISTS; | |
1253 | } else if (generation_zero == GENERATION_ZERO_EXISTS) | |
1254 | graph_report("commit-graph has non-zero generation number for commit %s, but zero elsewhere", | |
1255 | oid_to_hex(&cur_oid)); | |
1256 | ||
1257 | if (generation_zero == GENERATION_ZERO_EXISTS) | |
1258 | continue; | |
1259 | ||
1260 | /* | |
1261 | * If one of our parents has generation GENERATION_NUMBER_MAX, then | |
1262 | * our generation is also GENERATION_NUMBER_MAX. Decrement to avoid | |
1263 | * extra logic in the following condition. | |
1264 | */ | |
1265 | if (max_generation == GENERATION_NUMBER_MAX) | |
1266 | max_generation--; | |
1267 | ||
1268 | if (graph_commit->generation != max_generation + 1) | |
1269 | graph_report("commit-graph generation for commit %s is %u != %u", | |
1270 | oid_to_hex(&cur_oid), | |
1271 | graph_commit->generation, | |
1272 | max_generation + 1); | |
88968ebf DS |
1273 | |
1274 | if (graph_commit->date != odb_commit->date) | |
1275 | graph_report("commit date for commit %s in commit-graph is %"PRItime" != %"PRItime, | |
1276 | oid_to_hex(&cur_oid), | |
1277 | graph_commit->date, | |
1278 | odb_commit->date); | |
96af91d4 | 1279 | } |
1f7f557f | 1280 | stop_progress(&progress); |
96af91d4 | 1281 | |
283e68c7 DS |
1282 | return verify_commit_graph_error; |
1283 | } | |
c3756d5b JT |
1284 | |
1285 | void free_commit_graph(struct commit_graph *g) | |
1286 | { | |
1287 | if (!g) | |
1288 | return; | |
1289 | if (g->graph_fd >= 0) { | |
1290 | munmap((void *)g->data, g->data_len); | |
1291 | g->data = NULL; | |
1292 | close(g->graph_fd); | |
1293 | } | |
1294 | free(g); | |
1295 | } |