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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 | ||
67a530fa | 95 | struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st) |
2a2e32bd DS |
96 | { |
97 | void *graph_map; | |
2a2e32bd | 98 | size_t graph_size; |
aa658574 | 99 | struct commit_graph *ret; |
2a2e32bd | 100 | |
61df89c8 | 101 | graph_size = xsize_t(st->st_size); |
2a2e32bd DS |
102 | |
103 | if (graph_size < GRAPH_MIN_SIZE) { | |
104 | close(fd); | |
67a530fa | 105 | error(_("commit-graph file is too small")); |
61df89c8 | 106 | return NULL; |
2a2e32bd DS |
107 | } |
108 | graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
aa658574 JS |
109 | ret = parse_commit_graph(graph_map, fd, graph_size); |
110 | ||
111 | if (!ret) { | |
112 | munmap(graph_map, graph_size); | |
113 | close(fd); | |
aa658574 JS |
114 | } |
115 | ||
116 | return ret; | |
117 | } | |
118 | ||
2ac138d5 ÆAB |
119 | static int verify_commit_graph_lite(struct commit_graph *g) |
120 | { | |
121 | /* | |
122 | * Basic validation shared between parse_commit_graph() | |
123 | * which'll be called every time the graph is used, and the | |
124 | * much more expensive verify_commit_graph() used by | |
125 | * "commit-graph verify". | |
126 | * | |
127 | * There should only be very basic checks here to ensure that | |
128 | * we don't e.g. segfault in fill_commit_in_graph(), but | |
129 | * because this is a very hot codepath nothing that e.g. loops | |
130 | * over g->num_commits, or runs a checksum on the commit-graph | |
131 | * itself. | |
132 | */ | |
133 | if (!g->chunk_oid_fanout) { | |
134 | error("commit-graph is missing the OID Fanout chunk"); | |
135 | return 1; | |
136 | } | |
137 | if (!g->chunk_oid_lookup) { | |
138 | error("commit-graph is missing the OID Lookup chunk"); | |
139 | return 1; | |
140 | } | |
141 | if (!g->chunk_commit_data) { | |
142 | error("commit-graph is missing the Commit Data chunk"); | |
143 | return 1; | |
144 | } | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
aa658574 JS |
149 | struct commit_graph *parse_commit_graph(void *graph_map, int fd, |
150 | size_t graph_size) | |
151 | { | |
152 | const unsigned char *data, *chunk_lookup; | |
153 | uint32_t i; | |
154 | struct commit_graph *graph; | |
155 | uint64_t last_chunk_offset; | |
156 | uint32_t last_chunk_id; | |
157 | uint32_t graph_signature; | |
158 | unsigned char graph_version, hash_version; | |
159 | ||
160 | if (!graph_map) | |
161 | return NULL; | |
162 | ||
163 | if (graph_size < GRAPH_MIN_SIZE) | |
164 | return NULL; | |
165 | ||
2a2e32bd DS |
166 | data = (const unsigned char *)graph_map; |
167 | ||
168 | graph_signature = get_be32(data); | |
169 | if (graph_signature != GRAPH_SIGNATURE) { | |
4f5b532d | 170 | error(_("graph signature %X does not match signature %X"), |
2a2e32bd | 171 | graph_signature, GRAPH_SIGNATURE); |
aa658574 | 172 | return NULL; |
2a2e32bd DS |
173 | } |
174 | ||
175 | graph_version = *(unsigned char*)(data + 4); | |
176 | if (graph_version != GRAPH_VERSION) { | |
4f5b532d | 177 | error(_("graph version %X does not match version %X"), |
2a2e32bd | 178 | graph_version, GRAPH_VERSION); |
aa658574 | 179 | return NULL; |
2a2e32bd DS |
180 | } |
181 | ||
182 | hash_version = *(unsigned char*)(data + 5); | |
c1665998 | 183 | if (hash_version != oid_version()) { |
4f5b532d | 184 | error(_("hash version %X does not match version %X"), |
c1665998 | 185 | hash_version, oid_version()); |
aa658574 | 186 | return NULL; |
2a2e32bd DS |
187 | } |
188 | ||
189 | graph = alloc_commit_graph(); | |
190 | ||
c1665998 | 191 | graph->hash_len = the_hash_algo->rawsz; |
2a2e32bd DS |
192 | graph->num_chunks = *(unsigned char*)(data + 6); |
193 | graph->graph_fd = fd; | |
194 | graph->data = graph_map; | |
195 | graph->data_len = graph_size; | |
196 | ||
197 | last_chunk_id = 0; | |
198 | last_chunk_offset = 8; | |
199 | chunk_lookup = data + 8; | |
200 | for (i = 0; i < graph->num_chunks; i++) { | |
d2b86fba JS |
201 | uint32_t chunk_id; |
202 | uint64_t chunk_offset; | |
2a2e32bd DS |
203 | int chunk_repeated = 0; |
204 | ||
d2b86fba JS |
205 | if (data + graph_size - chunk_lookup < |
206 | GRAPH_CHUNKLOOKUP_WIDTH) { | |
207 | error(_("chunk lookup table entry missing; graph file may be incomplete")); | |
208 | free(graph); | |
209 | return NULL; | |
210 | } | |
211 | ||
212 | chunk_id = get_be32(chunk_lookup + 0); | |
213 | chunk_offset = get_be64(chunk_lookup + 4); | |
214 | ||
2a2e32bd DS |
215 | chunk_lookup += GRAPH_CHUNKLOOKUP_WIDTH; |
216 | ||
c1665998 | 217 | if (chunk_offset > graph_size - the_hash_algo->rawsz) { |
4f5b532d | 218 | error(_("improper chunk offset %08x%08x"), (uint32_t)(chunk_offset >> 32), |
2a2e32bd | 219 | (uint32_t)chunk_offset); |
aa658574 JS |
220 | free(graph); |
221 | return NULL; | |
2a2e32bd DS |
222 | } |
223 | ||
224 | switch (chunk_id) { | |
225 | case GRAPH_CHUNKID_OIDFANOUT: | |
226 | if (graph->chunk_oid_fanout) | |
227 | chunk_repeated = 1; | |
228 | else | |
229 | graph->chunk_oid_fanout = (uint32_t*)(data + chunk_offset); | |
230 | break; | |
231 | ||
232 | case GRAPH_CHUNKID_OIDLOOKUP: | |
233 | if (graph->chunk_oid_lookup) | |
234 | chunk_repeated = 1; | |
235 | else | |
236 | graph->chunk_oid_lookup = data + chunk_offset; | |
237 | break; | |
238 | ||
239 | case GRAPH_CHUNKID_DATA: | |
240 | if (graph->chunk_commit_data) | |
241 | chunk_repeated = 1; | |
242 | else | |
243 | graph->chunk_commit_data = data + chunk_offset; | |
244 | break; | |
245 | ||
5af7417b SG |
246 | case GRAPH_CHUNKID_EXTRAEDGES: |
247 | if (graph->chunk_extra_edges) | |
2a2e32bd DS |
248 | chunk_repeated = 1; |
249 | else | |
5af7417b | 250 | graph->chunk_extra_edges = data + chunk_offset; |
2a2e32bd DS |
251 | break; |
252 | } | |
253 | ||
254 | if (chunk_repeated) { | |
4f5b532d | 255 | error(_("chunk id %08x appears multiple times"), chunk_id); |
aa658574 JS |
256 | free(graph); |
257 | return NULL; | |
2a2e32bd DS |
258 | } |
259 | ||
260 | if (last_chunk_id == GRAPH_CHUNKID_OIDLOOKUP) | |
261 | { | |
262 | graph->num_commits = (chunk_offset - last_chunk_offset) | |
263 | / graph->hash_len; | |
264 | } | |
265 | ||
266 | last_chunk_id = chunk_id; | |
267 | last_chunk_offset = chunk_offset; | |
268 | } | |
269 | ||
2ac138d5 ÆAB |
270 | if (verify_commit_graph_lite(graph)) |
271 | return NULL; | |
272 | ||
2a2e32bd | 273 | return graph; |
2a2e32bd DS |
274 | } |
275 | ||
61df89c8 ÆAB |
276 | static struct commit_graph *load_commit_graph_one(const char *graph_file) |
277 | { | |
278 | ||
279 | struct stat st; | |
280 | int fd; | |
281 | int open_ok = open_commit_graph(graph_file, &fd, &st); | |
282 | ||
283 | if (!open_ok) | |
284 | return NULL; | |
285 | ||
67a530fa | 286 | return load_commit_graph_one_fd_st(fd, &st); |
61df89c8 ÆAB |
287 | } |
288 | ||
dade47c0 | 289 | static void prepare_commit_graph_one(struct repository *r, const char *obj_dir) |
177722b3 DS |
290 | { |
291 | char *graph_name; | |
292 | ||
dade47c0 | 293 | if (r->objects->commit_graph) |
177722b3 DS |
294 | return; |
295 | ||
296 | graph_name = get_commit_graph_filename(obj_dir); | |
dade47c0 | 297 | r->objects->commit_graph = |
85277506 | 298 | load_commit_graph_one(graph_name); |
177722b3 DS |
299 | |
300 | FREE_AND_NULL(graph_name); | |
301 | } | |
302 | ||
5faf357b JT |
303 | /* |
304 | * Return 1 if commit_graph is non-NULL, and 0 otherwise. | |
305 | * | |
306 | * On the first invocation, this function attemps to load the commit | |
307 | * graph if the_repository is configured to have one. | |
308 | */ | |
dade47c0 | 309 | static int prepare_commit_graph(struct repository *r) |
177722b3 | 310 | { |
263db403 | 311 | struct object_directory *odb; |
dade47c0 JT |
312 | int config_value; |
313 | ||
43d35618 ÆAB |
314 | if (git_env_bool(GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD, 0)) |
315 | die("dying as requested by the '%s' variable on commit-graph load!", | |
316 | GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD); | |
317 | ||
dade47c0 JT |
318 | if (r->objects->commit_graph_attempted) |
319 | return !!r->objects->commit_graph; | |
320 | r->objects->commit_graph_attempted = 1; | |
321 | ||
859fdc0c DS |
322 | if (!git_env_bool(GIT_TEST_COMMIT_GRAPH, 0) && |
323 | (repo_config_get_bool(r, "core.commitgraph", &config_value) || | |
324 | !config_value)) | |
dade47c0 JT |
325 | /* |
326 | * This repository is not configured to use commit graphs, so | |
327 | * do not load one. (But report commit_graph_attempted anyway | |
328 | * so that commit graph loading is not attempted again for this | |
329 | * repository.) | |
330 | */ | |
5faf357b JT |
331 | return 0; |
332 | ||
d6538246 DS |
333 | if (!commit_graph_compatible(r)) |
334 | return 0; | |
335 | ||
dade47c0 | 336 | prepare_alt_odb(r); |
f0eaf638 | 337 | for (odb = r->objects->odb; |
263db403 JK |
338 | !r->objects->commit_graph && odb; |
339 | odb = odb->next) | |
340 | prepare_commit_graph_one(r, odb->path); | |
dade47c0 | 341 | return !!r->objects->commit_graph; |
177722b3 DS |
342 | } |
343 | ||
6cc01743 DS |
344 | int generation_numbers_enabled(struct repository *r) |
345 | { | |
346 | uint32_t first_generation; | |
347 | struct commit_graph *g; | |
348 | if (!prepare_commit_graph(r)) | |
349 | return 0; | |
350 | ||
351 | g = r->objects->commit_graph; | |
352 | ||
353 | if (!g->num_commits) | |
354 | return 0; | |
355 | ||
356 | first_generation = get_be32(g->chunk_commit_data + | |
357 | g->hash_len + 8) >> 2; | |
358 | ||
359 | return !!first_generation; | |
360 | } | |
361 | ||
829a3215 | 362 | void close_commit_graph(struct repository *r) |
177722b3 | 363 | { |
829a3215 DS |
364 | free_commit_graph(r->objects->commit_graph); |
365 | r->objects->commit_graph = NULL; | |
177722b3 DS |
366 | } |
367 | ||
368 | static int bsearch_graph(struct commit_graph *g, struct object_id *oid, uint32_t *pos) | |
369 | { | |
370 | return bsearch_hash(oid->hash, g->chunk_oid_fanout, | |
371 | g->chunk_oid_lookup, g->hash_len, pos); | |
372 | } | |
373 | ||
4f542b7a SB |
374 | static struct commit_list **insert_parent_or_die(struct repository *r, |
375 | struct commit_graph *g, | |
177722b3 DS |
376 | uint64_t pos, |
377 | struct commit_list **pptr) | |
378 | { | |
379 | struct commit *c; | |
380 | struct object_id oid; | |
96af91d4 | 381 | |
53614b13 DS |
382 | if (pos >= g->num_commits) |
383 | die("invalid parent position %"PRIu64, pos); | |
384 | ||
177722b3 | 385 | hashcpy(oid.hash, g->chunk_oid_lookup + g->hash_len * pos); |
4f542b7a | 386 | c = lookup_commit(r, &oid); |
177722b3 | 387 | if (!c) |
4f5b532d | 388 | die(_("could not find commit %s"), oid_to_hex(&oid)); |
177722b3 DS |
389 | c->graph_pos = pos; |
390 | return &commit_list_insert(c, pptr)->next; | |
391 | } | |
392 | ||
e2838d85 DS |
393 | static void fill_commit_graph_info(struct commit *item, struct commit_graph *g, uint32_t pos) |
394 | { | |
395 | const unsigned char *commit_data = g->chunk_commit_data + GRAPH_DATA_WIDTH * pos; | |
396 | item->graph_pos = pos; | |
397 | item->generation = get_be32(commit_data + g->hash_len + 8) >> 2; | |
398 | } | |
399 | ||
4f542b7a SB |
400 | static int fill_commit_in_graph(struct repository *r, |
401 | struct commit *item, | |
402 | struct commit_graph *g, uint32_t pos) | |
177722b3 | 403 | { |
177722b3 DS |
404 | uint32_t edge_value; |
405 | uint32_t *parent_data_ptr; | |
406 | uint64_t date_low, date_high; | |
407 | struct commit_list **pptr; | |
408 | const unsigned char *commit_data = g->chunk_commit_data + (g->hash_len + 16) * pos; | |
409 | ||
410 | item->object.parsed = 1; | |
411 | item->graph_pos = pos; | |
412 | ||
7b8a21db | 413 | item->maybe_tree = NULL; |
177722b3 DS |
414 | |
415 | date_high = get_be32(commit_data + g->hash_len + 8) & 0x3; | |
416 | date_low = get_be32(commit_data + g->hash_len + 12); | |
417 | item->date = (timestamp_t)((date_high << 32) | date_low); | |
418 | ||
83073cc9 DS |
419 | item->generation = get_be32(commit_data + g->hash_len + 8) >> 2; |
420 | ||
177722b3 DS |
421 | pptr = &item->parents; |
422 | ||
423 | edge_value = get_be32(commit_data + g->hash_len); | |
424 | if (edge_value == GRAPH_PARENT_NONE) | |
425 | return 1; | |
4f542b7a | 426 | pptr = insert_parent_or_die(r, g, edge_value, pptr); |
177722b3 DS |
427 | |
428 | edge_value = get_be32(commit_data + g->hash_len + 4); | |
429 | if (edge_value == GRAPH_PARENT_NONE) | |
430 | return 1; | |
5af7417b | 431 | if (!(edge_value & GRAPH_EXTRA_EDGES_NEEDED)) { |
4f542b7a | 432 | pptr = insert_parent_or_die(r, g, edge_value, pptr); |
177722b3 DS |
433 | return 1; |
434 | } | |
435 | ||
5af7417b | 436 | parent_data_ptr = (uint32_t*)(g->chunk_extra_edges + |
177722b3 DS |
437 | 4 * (uint64_t)(edge_value & GRAPH_EDGE_LAST_MASK)); |
438 | do { | |
439 | edge_value = get_be32(parent_data_ptr); | |
4f542b7a | 440 | pptr = insert_parent_or_die(r, g, |
177722b3 DS |
441 | edge_value & GRAPH_EDGE_LAST_MASK, |
442 | pptr); | |
443 | parent_data_ptr++; | |
444 | } while (!(edge_value & GRAPH_LAST_EDGE)); | |
445 | ||
446 | return 1; | |
447 | } | |
448 | ||
e2838d85 DS |
449 | static int find_commit_in_graph(struct commit *item, struct commit_graph *g, uint32_t *pos) |
450 | { | |
451 | if (item->graph_pos != COMMIT_NOT_FROM_GRAPH) { | |
452 | *pos = item->graph_pos; | |
453 | return 1; | |
454 | } else { | |
455 | return bsearch_graph(g, &(item->object.oid), pos); | |
456 | } | |
457 | } | |
458 | ||
4f542b7a SB |
459 | static int parse_commit_in_graph_one(struct repository *r, |
460 | struct commit_graph *g, | |
461 | struct commit *item) | |
177722b3 | 462 | { |
e2838d85 DS |
463 | uint32_t pos; |
464 | ||
177722b3 DS |
465 | if (item->object.parsed) |
466 | return 1; | |
ee797053 DS |
467 | |
468 | if (find_commit_in_graph(item, g, &pos)) | |
4f542b7a | 469 | return fill_commit_in_graph(r, item, g, pos); |
ee797053 DS |
470 | |
471 | return 0; | |
472 | } | |
473 | ||
dade47c0 | 474 | int parse_commit_in_graph(struct repository *r, struct commit *item) |
ee797053 | 475 | { |
dade47c0 | 476 | if (!prepare_commit_graph(r)) |
ee797053 | 477 | return 0; |
4f542b7a | 478 | return parse_commit_in_graph_one(r, r->objects->commit_graph, item); |
177722b3 DS |
479 | } |
480 | ||
dade47c0 | 481 | void load_commit_graph_info(struct repository *r, struct commit *item) |
e2838d85 DS |
482 | { |
483 | uint32_t pos; | |
dade47c0 | 484 | if (!prepare_commit_graph(r)) |
e2838d85 | 485 | return; |
dade47c0 JT |
486 | if (find_commit_in_graph(item, r->objects->commit_graph, &pos)) |
487 | fill_commit_graph_info(item, r->objects->commit_graph, pos); | |
e2838d85 DS |
488 | } |
489 | ||
4f542b7a SB |
490 | static struct tree *load_tree_for_commit(struct repository *r, |
491 | struct commit_graph *g, | |
492 | struct commit *c) | |
7b8a21db DS |
493 | { |
494 | struct object_id oid; | |
495 | const unsigned char *commit_data = g->chunk_commit_data + | |
496 | GRAPH_DATA_WIDTH * (c->graph_pos); | |
497 | ||
498 | hashcpy(oid.hash, commit_data); | |
4f542b7a | 499 | c->maybe_tree = lookup_tree(r, &oid); |
7b8a21db DS |
500 | |
501 | return c->maybe_tree; | |
502 | } | |
503 | ||
4f542b7a SB |
504 | static struct tree *get_commit_tree_in_graph_one(struct repository *r, |
505 | struct commit_graph *g, | |
0cbef8f8 | 506 | const struct commit *c) |
7b8a21db DS |
507 | { |
508 | if (c->maybe_tree) | |
509 | return c->maybe_tree; | |
510 | if (c->graph_pos == COMMIT_NOT_FROM_GRAPH) | |
0cbef8f8 DS |
511 | BUG("get_commit_tree_in_graph_one called from non-commit-graph commit"); |
512 | ||
4f542b7a | 513 | return load_tree_for_commit(r, g, (struct commit *)c); |
0cbef8f8 | 514 | } |
7b8a21db | 515 | |
dade47c0 | 516 | struct tree *get_commit_tree_in_graph(struct repository *r, const struct commit *c) |
0cbef8f8 | 517 | { |
4f542b7a | 518 | return get_commit_tree_in_graph_one(r, r->objects->commit_graph, c); |
7b8a21db DS |
519 | } |
520 | ||
08fd81c9 DS |
521 | static void write_graph_chunk_fanout(struct hashfile *f, |
522 | struct commit **commits, | |
53035c4f ÆAB |
523 | int nr_commits, |
524 | struct progress *progress, | |
525 | uint64_t *progress_cnt) | |
08fd81c9 DS |
526 | { |
527 | int i, count = 0; | |
528 | struct commit **list = commits; | |
529 | ||
530 | /* | |
531 | * Write the first-level table (the list is sorted, | |
532 | * but we use a 256-entry lookup to be able to avoid | |
533 | * having to do eight extra binary search iterations). | |
534 | */ | |
535 | for (i = 0; i < 256; i++) { | |
536 | while (count < nr_commits) { | |
537 | if ((*list)->object.oid.hash[0] != i) | |
538 | break; | |
53035c4f | 539 | display_progress(progress, ++*progress_cnt); |
08fd81c9 DS |
540 | count++; |
541 | list++; | |
542 | } | |
543 | ||
544 | hashwrite_be32(f, count); | |
545 | } | |
546 | } | |
547 | ||
548 | static void write_graph_chunk_oids(struct hashfile *f, int hash_len, | |
53035c4f ÆAB |
549 | struct commit **commits, int nr_commits, |
550 | struct progress *progress, | |
551 | uint64_t *progress_cnt) | |
08fd81c9 DS |
552 | { |
553 | struct commit **list = commits; | |
554 | int count; | |
53035c4f ÆAB |
555 | for (count = 0; count < nr_commits; count++, list++) { |
556 | display_progress(progress, ++*progress_cnt); | |
08fd81c9 | 557 | hashwrite(f, (*list)->object.oid.hash, (int)hash_len); |
53035c4f | 558 | } |
08fd81c9 DS |
559 | } |
560 | ||
561 | static const unsigned char *commit_to_sha1(size_t index, void *table) | |
562 | { | |
563 | struct commit **commits = table; | |
564 | return commits[index]->object.oid.hash; | |
565 | } | |
566 | ||
567 | static void write_graph_chunk_data(struct hashfile *f, int hash_len, | |
53035c4f ÆAB |
568 | struct commit **commits, int nr_commits, |
569 | struct progress *progress, | |
570 | uint64_t *progress_cnt) | |
08fd81c9 DS |
571 | { |
572 | struct commit **list = commits; | |
573 | struct commit **last = commits + nr_commits; | |
574 | uint32_t num_extra_edges = 0; | |
575 | ||
576 | while (list < last) { | |
577 | struct commit_list *parent; | |
578 | int edge_value; | |
579 | uint32_t packedDate[2]; | |
53035c4f | 580 | display_progress(progress, ++*progress_cnt); |
08fd81c9 | 581 | |
43d35618 | 582 | parse_commit_no_graph(*list); |
2e27bd77 | 583 | hashwrite(f, get_commit_tree_oid(*list)->hash, hash_len); |
08fd81c9 DS |
584 | |
585 | parent = (*list)->parents; | |
586 | ||
587 | if (!parent) | |
588 | edge_value = GRAPH_PARENT_NONE; | |
589 | else { | |
590 | edge_value = sha1_pos(parent->item->object.oid.hash, | |
591 | commits, | |
592 | nr_commits, | |
593 | commit_to_sha1); | |
594 | ||
595 | if (edge_value < 0) | |
cce99cd8 DS |
596 | BUG("missing parent %s for commit %s", |
597 | oid_to_hex(&parent->item->object.oid), | |
598 | oid_to_hex(&(*list)->object.oid)); | |
08fd81c9 DS |
599 | } |
600 | ||
601 | hashwrite_be32(f, edge_value); | |
602 | ||
603 | if (parent) | |
604 | parent = parent->next; | |
605 | ||
606 | if (!parent) | |
607 | edge_value = GRAPH_PARENT_NONE; | |
608 | else if (parent->next) | |
5af7417b | 609 | edge_value = GRAPH_EXTRA_EDGES_NEEDED | num_extra_edges; |
08fd81c9 DS |
610 | else { |
611 | edge_value = sha1_pos(parent->item->object.oid.hash, | |
612 | commits, | |
613 | nr_commits, | |
614 | commit_to_sha1); | |
615 | if (edge_value < 0) | |
cce99cd8 DS |
616 | BUG("missing parent %s for commit %s", |
617 | oid_to_hex(&parent->item->object.oid), | |
618 | oid_to_hex(&(*list)->object.oid)); | |
08fd81c9 DS |
619 | } |
620 | ||
621 | hashwrite_be32(f, edge_value); | |
622 | ||
5af7417b | 623 | if (edge_value & GRAPH_EXTRA_EDGES_NEEDED) { |
08fd81c9 DS |
624 | do { |
625 | num_extra_edges++; | |
626 | parent = parent->next; | |
627 | } while (parent); | |
628 | } | |
629 | ||
630 | if (sizeof((*list)->date) > 4) | |
631 | packedDate[0] = htonl(((*list)->date >> 32) & 0x3); | |
632 | else | |
633 | packedDate[0] = 0; | |
634 | ||
3258c663 DS |
635 | packedDate[0] |= htonl((*list)->generation << 2); |
636 | ||
08fd81c9 DS |
637 | packedDate[1] = htonl((*list)->date); |
638 | hashwrite(f, packedDate, 8); | |
639 | ||
640 | list++; | |
641 | } | |
642 | } | |
643 | ||
5af7417b | 644 | static void write_graph_chunk_extra_edges(struct hashfile *f, |
08fd81c9 | 645 | struct commit **commits, |
53035c4f ÆAB |
646 | int nr_commits, |
647 | struct progress *progress, | |
648 | uint64_t *progress_cnt) | |
08fd81c9 DS |
649 | { |
650 | struct commit **list = commits; | |
651 | struct commit **last = commits + nr_commits; | |
652 | struct commit_list *parent; | |
653 | ||
654 | while (list < last) { | |
655 | int num_parents = 0; | |
53035c4f ÆAB |
656 | |
657 | display_progress(progress, ++*progress_cnt); | |
658 | ||
08fd81c9 DS |
659 | for (parent = (*list)->parents; num_parents < 3 && parent; |
660 | parent = parent->next) | |
661 | num_parents++; | |
662 | ||
663 | if (num_parents <= 2) { | |
664 | list++; | |
665 | continue; | |
666 | } | |
667 | ||
668 | /* Since num_parents > 2, this initializer is safe. */ | |
669 | for (parent = (*list)->parents->next; parent; parent = parent->next) { | |
670 | int edge_value = sha1_pos(parent->item->object.oid.hash, | |
671 | commits, | |
672 | nr_commits, | |
673 | commit_to_sha1); | |
674 | ||
675 | if (edge_value < 0) | |
cce99cd8 DS |
676 | BUG("missing parent %s for commit %s", |
677 | oid_to_hex(&parent->item->object.oid), | |
678 | oid_to_hex(&(*list)->object.oid)); | |
08fd81c9 DS |
679 | else if (!parent->next) |
680 | edge_value |= GRAPH_LAST_EDGE; | |
681 | ||
682 | hashwrite_be32(f, edge_value); | |
683 | } | |
684 | ||
685 | list++; | |
686 | } | |
687 | } | |
688 | ||
689 | static int commit_compare(const void *_a, const void *_b) | |
690 | { | |
691 | const struct object_id *a = (const struct object_id *)_a; | |
692 | const struct object_id *b = (const struct object_id *)_b; | |
693 | return oidcmp(a, b); | |
694 | } | |
695 | ||
696 | struct packed_commit_list { | |
697 | struct commit **list; | |
698 | int nr; | |
699 | int alloc; | |
700 | }; | |
701 | ||
702 | struct packed_oid_list { | |
703 | struct object_id *list; | |
704 | int nr; | |
705 | int alloc; | |
7b0f2292 ÆAB |
706 | struct progress *progress; |
707 | int progress_done; | |
08fd81c9 DS |
708 | }; |
709 | ||
710 | static int add_packed_commits(const struct object_id *oid, | |
711 | struct packed_git *pack, | |
712 | uint32_t pos, | |
713 | void *data) | |
714 | { | |
715 | struct packed_oid_list *list = (struct packed_oid_list*)data; | |
716 | enum object_type type; | |
717 | off_t offset = nth_packed_object_offset(pack, pos); | |
718 | struct object_info oi = OBJECT_INFO_INIT; | |
719 | ||
7b0f2292 ÆAB |
720 | if (list->progress) |
721 | display_progress(list->progress, ++list->progress_done); | |
722 | ||
08fd81c9 | 723 | oi.typep = &type; |
fcb6df32 | 724 | if (packed_object_info(the_repository, pack, offset, &oi) < 0) |
4f5b532d | 725 | die(_("unable to get type of object %s"), oid_to_hex(oid)); |
08fd81c9 DS |
726 | |
727 | if (type != OBJ_COMMIT) | |
728 | return 0; | |
729 | ||
730 | ALLOC_GROW(list->list, list->nr + 1, list->alloc); | |
731 | oidcpy(&(list->list[list->nr]), oid); | |
732 | list->nr++; | |
733 | ||
734 | return 0; | |
735 | } | |
736 | ||
4f2542b4 DS |
737 | static void add_missing_parents(struct packed_oid_list *oids, struct commit *commit) |
738 | { | |
739 | struct commit_list *parent; | |
740 | for (parent = commit->parents; parent; parent = parent->next) { | |
741 | if (!(parent->item->object.flags & UNINTERESTING)) { | |
742 | ALLOC_GROW(oids->list, oids->nr + 1, oids->alloc); | |
743 | oidcpy(&oids->list[oids->nr], &(parent->item->object.oid)); | |
744 | oids->nr++; | |
745 | parent->item->object.flags |= UNINTERESTING; | |
746 | } | |
747 | } | |
748 | } | |
749 | ||
7b0f2292 | 750 | static void close_reachable(struct packed_oid_list *oids, int report_progress) |
4f2542b4 | 751 | { |
49bbc57a | 752 | int i; |
4f2542b4 | 753 | struct commit *commit; |
7b0f2292 | 754 | struct progress *progress = NULL; |
4f2542b4 | 755 | |
7b0f2292 ÆAB |
756 | if (report_progress) |
757 | progress = start_delayed_progress( | |
49bbc57a | 758 | _("Loading known commits in commit graph"), oids->nr); |
4f2542b4 | 759 | for (i = 0; i < oids->nr; i++) { |
49bbc57a | 760 | display_progress(progress, i + 1); |
c1f5eb49 | 761 | commit = lookup_commit(the_repository, &oids->list[i]); |
4f2542b4 DS |
762 | if (commit) |
763 | commit->object.flags |= UNINTERESTING; | |
764 | } | |
01ca3877 | 765 | stop_progress(&progress); |
4f2542b4 DS |
766 | |
767 | /* | |
768 | * As this loop runs, oids->nr may grow, but not more | |
769 | * than the number of missing commits in the reachable | |
770 | * closure. | |
771 | */ | |
01ca3877 ÆAB |
772 | if (report_progress) |
773 | progress = start_delayed_progress( | |
49bbc57a | 774 | _("Expanding reachable commits in commit graph"), oids->nr); |
4f2542b4 | 775 | for (i = 0; i < oids->nr; i++) { |
49bbc57a | 776 | display_progress(progress, i + 1); |
c1f5eb49 | 777 | commit = lookup_commit(the_repository, &oids->list[i]); |
4f2542b4 | 778 | |
43d35618 | 779 | if (commit && !parse_commit_no_graph(commit)) |
4f2542b4 DS |
780 | add_missing_parents(oids, commit); |
781 | } | |
01ca3877 | 782 | stop_progress(&progress); |
4f2542b4 | 783 | |
01ca3877 ÆAB |
784 | if (report_progress) |
785 | progress = start_delayed_progress( | |
49bbc57a | 786 | _("Clearing commit marks in commit graph"), oids->nr); |
4f2542b4 | 787 | for (i = 0; i < oids->nr; i++) { |
49bbc57a | 788 | display_progress(progress, i + 1); |
c1f5eb49 | 789 | commit = lookup_commit(the_repository, &oids->list[i]); |
4f2542b4 DS |
790 | |
791 | if (commit) | |
792 | commit->object.flags &= ~UNINTERESTING; | |
793 | } | |
7b0f2292 | 794 | stop_progress(&progress); |
4f2542b4 DS |
795 | } |
796 | ||
7b0f2292 ÆAB |
797 | static void compute_generation_numbers(struct packed_commit_list* commits, |
798 | int report_progress) | |
3258c663 DS |
799 | { |
800 | int i; | |
801 | struct commit_list *list = NULL; | |
7b0f2292 | 802 | struct progress *progress = NULL; |
3258c663 | 803 | |
7b0f2292 ÆAB |
804 | if (report_progress) |
805 | progress = start_progress( | |
806 | _("Computing commit graph generation numbers"), | |
807 | commits->nr); | |
3258c663 | 808 | for (i = 0; i < commits->nr; i++) { |
7b0f2292 | 809 | display_progress(progress, i + 1); |
3258c663 DS |
810 | if (commits->list[i]->generation != GENERATION_NUMBER_INFINITY && |
811 | commits->list[i]->generation != GENERATION_NUMBER_ZERO) | |
812 | continue; | |
813 | ||
814 | commit_list_insert(commits->list[i], &list); | |
815 | while (list) { | |
816 | struct commit *current = list->item; | |
817 | struct commit_list *parent; | |
818 | int all_parents_computed = 1; | |
819 | uint32_t max_generation = 0; | |
820 | ||
821 | for (parent = current->parents; parent; parent = parent->next) { | |
822 | if (parent->item->generation == GENERATION_NUMBER_INFINITY || | |
823 | parent->item->generation == GENERATION_NUMBER_ZERO) { | |
824 | all_parents_computed = 0; | |
825 | commit_list_insert(parent->item, &list); | |
826 | break; | |
827 | } else if (parent->item->generation > max_generation) { | |
828 | max_generation = parent->item->generation; | |
829 | } | |
830 | } | |
831 | ||
832 | if (all_parents_computed) { | |
833 | current->generation = max_generation + 1; | |
834 | pop_commit(&list); | |
835 | ||
836 | if (current->generation > GENERATION_NUMBER_MAX) | |
837 | current->generation = GENERATION_NUMBER_MAX; | |
838 | } | |
839 | } | |
840 | } | |
7b0f2292 | 841 | stop_progress(&progress); |
3258c663 DS |
842 | } |
843 | ||
59fb8770 DS |
844 | static int add_ref_to_list(const char *refname, |
845 | const struct object_id *oid, | |
846 | int flags, void *cb_data) | |
847 | { | |
848 | struct string_list *list = (struct string_list *)cb_data; | |
849 | ||
850 | string_list_append(list, oid_to_hex(oid)); | |
851 | return 0; | |
852 | } | |
853 | ||
7b0f2292 ÆAB |
854 | void write_commit_graph_reachable(const char *obj_dir, int append, |
855 | int report_progress) | |
59fb8770 | 856 | { |
f4dbdfc4 | 857 | struct string_list list = STRING_LIST_INIT_DUP; |
59fb8770 | 858 | |
59fb8770 | 859 | for_each_ref(add_ref_to_list, &list); |
7b0f2292 | 860 | write_commit_graph(obj_dir, NULL, &list, append, report_progress); |
f4dbdfc4 DS |
861 | |
862 | string_list_clear(&list, 0); | |
59fb8770 DS |
863 | } |
864 | ||
049d51a2 | 865 | void write_commit_graph(const char *obj_dir, |
d88b14b3 DS |
866 | struct string_list *pack_indexes, |
867 | struct string_list *commit_hex, | |
7b0f2292 | 868 | int append, int report_progress) |
08fd81c9 DS |
869 | { |
870 | struct packed_oid_list oids; | |
871 | struct packed_commit_list commits; | |
872 | struct hashfile *f; | |
873 | uint32_t i, count_distinct = 0; | |
874 | char *graph_name; | |
08fd81c9 DS |
875 | struct lock_file lk = LOCK_INIT; |
876 | uint32_t chunk_ids[5]; | |
877 | uint64_t chunk_offsets[5]; | |
878 | int num_chunks; | |
879 | int num_extra_edges; | |
880 | struct commit_list *parent; | |
7b0f2292 | 881 | struct progress *progress = NULL; |
c1665998 | 882 | const unsigned hashsz = the_hash_algo->rawsz; |
53035c4f | 883 | uint64_t progress_cnt = 0; |
28944739 | 884 | struct strbuf progress_title = STRBUF_INIT; |
d9b1b309 | 885 | unsigned long approx_nr_objects; |
08fd81c9 | 886 | |
d6538246 DS |
887 | if (!commit_graph_compatible(the_repository)) |
888 | return; | |
889 | ||
08fd81c9 | 890 | oids.nr = 0; |
d9b1b309 ÆAB |
891 | approx_nr_objects = approximate_object_count(); |
892 | oids.alloc = approx_nr_objects / 32; | |
7b0f2292 ÆAB |
893 | oids.progress = NULL; |
894 | oids.progress_done = 0; | |
08fd81c9 | 895 | |
7547b95b | 896 | if (append) { |
dade47c0 | 897 | prepare_commit_graph_one(the_repository, obj_dir); |
85277506 JT |
898 | if (the_repository->objects->commit_graph) |
899 | oids.alloc += the_repository->objects->commit_graph->num_commits; | |
7547b95b DS |
900 | } |
901 | ||
08fd81c9 DS |
902 | if (oids.alloc < 1024) |
903 | oids.alloc = 1024; | |
904 | ALLOC_ARRAY(oids.list, oids.alloc); | |
905 | ||
85277506 JT |
906 | if (append && the_repository->objects->commit_graph) { |
907 | struct commit_graph *commit_graph = | |
908 | the_repository->objects->commit_graph; | |
7547b95b DS |
909 | for (i = 0; i < commit_graph->num_commits; i++) { |
910 | const unsigned char *hash = commit_graph->chunk_oid_lookup + | |
911 | commit_graph->hash_len * i; | |
912 | hashcpy(oids.list[oids.nr++].hash, hash); | |
913 | } | |
914 | } | |
915 | ||
049d51a2 DS |
916 | if (pack_indexes) { |
917 | struct strbuf packname = STRBUF_INIT; | |
918 | int dirlen; | |
919 | strbuf_addf(&packname, "%s/pack/", obj_dir); | |
920 | dirlen = packname.len; | |
7b0f2292 | 921 | if (report_progress) { |
7c7b8a7f ÆAB |
922 | strbuf_addf(&progress_title, |
923 | Q_("Finding commits for commit graph in %d pack", | |
924 | "Finding commits for commit graph in %d packs", | |
925 | pack_indexes->nr), | |
926 | pack_indexes->nr); | |
927 | oids.progress = start_delayed_progress(progress_title.buf, 0); | |
7b0f2292 ÆAB |
928 | oids.progress_done = 0; |
929 | } | |
d88b14b3 | 930 | for (i = 0; i < pack_indexes->nr; i++) { |
049d51a2 DS |
931 | struct packed_git *p; |
932 | strbuf_setlen(&packname, dirlen); | |
d88b14b3 | 933 | strbuf_addstr(&packname, pack_indexes->items[i].string); |
049d51a2 DS |
934 | p = add_packed_git(packname.buf, packname.len, 1); |
935 | if (!p) | |
4f5b532d | 936 | die(_("error adding pack %s"), packname.buf); |
049d51a2 | 937 | if (open_pack_index(p)) |
4f5b532d | 938 | die(_("error opening index for %s"), packname.buf); |
d7574c95 ÆAB |
939 | for_each_object_in_pack(p, add_packed_commits, &oids, |
940 | FOR_EACH_OBJECT_PACK_ORDER); | |
049d51a2 | 941 | close_pack(p); |
f4dbdfc4 | 942 | free(p); |
049d51a2 | 943 | } |
7b0f2292 | 944 | stop_progress(&oids.progress); |
7c7b8a7f | 945 | strbuf_reset(&progress_title); |
049d51a2 | 946 | strbuf_release(&packname); |
3d5df01b DS |
947 | } |
948 | ||
949 | if (commit_hex) { | |
7c7b8a7f ÆAB |
950 | if (report_progress) { |
951 | strbuf_addf(&progress_title, | |
952 | Q_("Finding commits for commit graph from %d ref", | |
953 | "Finding commits for commit graph from %d refs", | |
954 | commit_hex->nr), | |
955 | commit_hex->nr); | |
956 | progress = start_delayed_progress(progress_title.buf, | |
957 | commit_hex->nr); | |
958 | } | |
d88b14b3 | 959 | for (i = 0; i < commit_hex->nr; i++) { |
3d5df01b DS |
960 | const char *end; |
961 | struct object_id oid; | |
962 | struct commit *result; | |
963 | ||
7b0f2292 | 964 | display_progress(progress, i + 1); |
d88b14b3 DS |
965 | if (commit_hex->items[i].string && |
966 | parse_oid_hex(commit_hex->items[i].string, &oid, &end)) | |
3d5df01b DS |
967 | continue; |
968 | ||
21e1ee8f | 969 | result = lookup_commit_reference_gently(the_repository, &oid, 1); |
3d5df01b DS |
970 | |
971 | if (result) { | |
972 | ALLOC_GROW(oids.list, oids.nr + 1, oids.alloc); | |
973 | oidcpy(&oids.list[oids.nr], &(result->object.oid)); | |
974 | oids.nr++; | |
975 | } | |
976 | } | |
7b0f2292 | 977 | stop_progress(&progress); |
7c7b8a7f | 978 | strbuf_reset(&progress_title); |
3d5df01b DS |
979 | } |
980 | ||
7b0f2292 ÆAB |
981 | if (!pack_indexes && !commit_hex) { |
982 | if (report_progress) | |
983 | oids.progress = start_delayed_progress( | |
7c7b8a7f | 984 | _("Finding commits for commit graph among packed objects"), |
d9b1b309 | 985 | approx_nr_objects); |
d7574c95 ÆAB |
986 | for_each_packed_object(add_packed_commits, &oids, |
987 | FOR_EACH_OBJECT_PACK_ORDER); | |
d9b1b309 ÆAB |
988 | if (oids.progress_done < approx_nr_objects) |
989 | display_progress(oids.progress, approx_nr_objects); | |
7b0f2292 ÆAB |
990 | stop_progress(&oids.progress); |
991 | } | |
049d51a2 | 992 | |
7b0f2292 | 993 | close_reachable(&oids, report_progress); |
08fd81c9 | 994 | |
890226cc ÆAB |
995 | if (report_progress) |
996 | progress = start_delayed_progress( | |
997 | _("Counting distinct commits in commit graph"), | |
998 | oids.nr); | |
999 | display_progress(progress, 0); /* TODO: Measure QSORT() progress */ | |
08fd81c9 | 1000 | QSORT(oids.list, oids.nr, commit_compare); |
08fd81c9 DS |
1001 | count_distinct = 1; |
1002 | for (i = 1; i < oids.nr; i++) { | |
890226cc | 1003 | display_progress(progress, i + 1); |
9001dc2a | 1004 | if (!oideq(&oids.list[i - 1], &oids.list[i])) |
08fd81c9 DS |
1005 | count_distinct++; |
1006 | } | |
890226cc | 1007 | stop_progress(&progress); |
08fd81c9 | 1008 | |
cce99cd8 | 1009 | if (count_distinct >= GRAPH_EDGE_LAST_MASK) |
08fd81c9 DS |
1010 | die(_("the commit graph format cannot write %d commits"), count_distinct); |
1011 | ||
1012 | commits.nr = 0; | |
1013 | commits.alloc = count_distinct; | |
1014 | ALLOC_ARRAY(commits.list, commits.alloc); | |
1015 | ||
1016 | num_extra_edges = 0; | |
890226cc ÆAB |
1017 | if (report_progress) |
1018 | progress = start_delayed_progress( | |
1019 | _("Finding extra edges in commit graph"), | |
1020 | oids.nr); | |
08fd81c9 DS |
1021 | for (i = 0; i < oids.nr; i++) { |
1022 | int num_parents = 0; | |
890226cc | 1023 | display_progress(progress, i + 1); |
4a7e27e9 | 1024 | if (i > 0 && oideq(&oids.list[i - 1], &oids.list[i])) |
08fd81c9 DS |
1025 | continue; |
1026 | ||
c1f5eb49 | 1027 | commits.list[commits.nr] = lookup_commit(the_repository, &oids.list[i]); |
43d35618 | 1028 | parse_commit_no_graph(commits.list[commits.nr]); |
08fd81c9 DS |
1029 | |
1030 | for (parent = commits.list[commits.nr]->parents; | |
1031 | parent; parent = parent->next) | |
1032 | num_parents++; | |
1033 | ||
1034 | if (num_parents > 2) | |
1035 | num_extra_edges += num_parents - 1; | |
1036 | ||
1037 | commits.nr++; | |
1038 | } | |
1039 | num_chunks = num_extra_edges ? 4 : 3; | |
890226cc | 1040 | stop_progress(&progress); |
08fd81c9 | 1041 | |
cce99cd8 | 1042 | if (commits.nr >= GRAPH_EDGE_LAST_MASK) |
08fd81c9 DS |
1043 | die(_("too many commits to write graph")); |
1044 | ||
7b0f2292 | 1045 | compute_generation_numbers(&commits, report_progress); |
08fd81c9 | 1046 | |
08fd81c9 | 1047 | graph_name = get_commit_graph_filename(obj_dir); |
f4dbdfc4 DS |
1048 | if (safe_create_leading_directories(graph_name)) { |
1049 | UNLEAK(graph_name); | |
33286dcd DS |
1050 | die_errno(_("unable to create leading directories of %s"), |
1051 | graph_name); | |
f4dbdfc4 | 1052 | } |
08fd81c9 | 1053 | |
33286dcd | 1054 | hold_lock_file_for_update(&lk, graph_name, LOCK_DIE_ON_ERROR); |
08fd81c9 DS |
1055 | f = hashfd(lk.tempfile->fd, lk.tempfile->filename.buf); |
1056 | ||
1057 | hashwrite_be32(f, GRAPH_SIGNATURE); | |
1058 | ||
1059 | hashwrite_u8(f, GRAPH_VERSION); | |
c1665998 | 1060 | hashwrite_u8(f, oid_version()); |
08fd81c9 DS |
1061 | hashwrite_u8(f, num_chunks); |
1062 | hashwrite_u8(f, 0); /* unused padding byte */ | |
1063 | ||
1064 | chunk_ids[0] = GRAPH_CHUNKID_OIDFANOUT; | |
1065 | chunk_ids[1] = GRAPH_CHUNKID_OIDLOOKUP; | |
1066 | chunk_ids[2] = GRAPH_CHUNKID_DATA; | |
1067 | if (num_extra_edges) | |
5af7417b | 1068 | chunk_ids[3] = GRAPH_CHUNKID_EXTRAEDGES; |
08fd81c9 DS |
1069 | else |
1070 | chunk_ids[3] = 0; | |
1071 | chunk_ids[4] = 0; | |
1072 | ||
1073 | chunk_offsets[0] = 8 + (num_chunks + 1) * GRAPH_CHUNKLOOKUP_WIDTH; | |
1074 | chunk_offsets[1] = chunk_offsets[0] + GRAPH_FANOUT_SIZE; | |
c1665998 | 1075 | chunk_offsets[2] = chunk_offsets[1] + hashsz * commits.nr; |
1076 | chunk_offsets[3] = chunk_offsets[2] + (hashsz + 16) * commits.nr; | |
08fd81c9 DS |
1077 | chunk_offsets[4] = chunk_offsets[3] + 4 * num_extra_edges; |
1078 | ||
1079 | for (i = 0; i <= num_chunks; i++) { | |
1080 | uint32_t chunk_write[3]; | |
1081 | ||
1082 | chunk_write[0] = htonl(chunk_ids[i]); | |
1083 | chunk_write[1] = htonl(chunk_offsets[i] >> 32); | |
1084 | chunk_write[2] = htonl(chunk_offsets[i] & 0xffffffff); | |
1085 | hashwrite(f, chunk_write, 12); | |
1086 | } | |
1087 | ||
28944739 ÆAB |
1088 | if (report_progress) { |
1089 | strbuf_addf(&progress_title, | |
1090 | Q_("Writing out commit graph in %d pass", | |
1091 | "Writing out commit graph in %d passes", | |
1092 | num_chunks), | |
1093 | num_chunks); | |
53035c4f | 1094 | progress = start_delayed_progress( |
28944739 | 1095 | progress_title.buf, |
53035c4f | 1096 | num_chunks * commits.nr); |
28944739 | 1097 | } |
53035c4f | 1098 | write_graph_chunk_fanout(f, commits.list, commits.nr, progress, &progress_cnt); |
e5eac573 JH |
1099 | write_graph_chunk_oids(f, hashsz, commits.list, commits.nr, progress, &progress_cnt); |
1100 | write_graph_chunk_data(f, hashsz, commits.list, commits.nr, progress, &progress_cnt); | |
857ba928 | 1101 | if (num_extra_edges) |
53035c4f ÆAB |
1102 | write_graph_chunk_extra_edges(f, commits.list, commits.nr, progress, &progress_cnt); |
1103 | stop_progress(&progress); | |
28944739 | 1104 | strbuf_release(&progress_title); |
08fd81c9 | 1105 | |
829a3215 | 1106 | close_commit_graph(the_repository); |
08fd81c9 DS |
1107 | finalize_hashfile(f, NULL, CSUM_HASH_IN_STREAM | CSUM_FSYNC); |
1108 | commit_lock_file(&lk); | |
1109 | ||
f4dbdfc4 DS |
1110 | free(graph_name); |
1111 | free(commits.list); | |
08fd81c9 | 1112 | free(oids.list); |
08fd81c9 | 1113 | } |
283e68c7 | 1114 | |
41df0e30 | 1115 | #define VERIFY_COMMIT_GRAPH_ERROR_HASH 2 |
283e68c7 DS |
1116 | static int verify_commit_graph_error; |
1117 | ||
1118 | static void graph_report(const char *fmt, ...) | |
1119 | { | |
1120 | va_list ap; | |
1121 | ||
1122 | verify_commit_graph_error = 1; | |
1123 | va_start(ap, fmt); | |
1124 | vfprintf(stderr, fmt, ap); | |
1125 | fprintf(stderr, "\n"); | |
1126 | va_end(ap); | |
1127 | } | |
1128 | ||
1373e547 DS |
1129 | #define GENERATION_ZERO_EXISTS 1 |
1130 | #define GENERATION_NUMBER_EXISTS 2 | |
1131 | ||
283e68c7 DS |
1132 | int verify_commit_graph(struct repository *r, struct commit_graph *g) |
1133 | { | |
9bda8467 | 1134 | uint32_t i, cur_fanout_pos = 0; |
41df0e30 | 1135 | struct object_id prev_oid, cur_oid, checksum; |
1373e547 | 1136 | int generation_zero = 0; |
41df0e30 DS |
1137 | struct hashfile *f; |
1138 | int devnull; | |
1f7f557f | 1139 | struct progress *progress = NULL; |
9bda8467 | 1140 | |
283e68c7 DS |
1141 | if (!g) { |
1142 | graph_report("no commit-graph file loaded"); | |
1143 | return 1; | |
1144 | } | |
1145 | ||
2ac138d5 | 1146 | verify_commit_graph_error = verify_commit_graph_lite(g); |
9bda8467 DS |
1147 | if (verify_commit_graph_error) |
1148 | return verify_commit_graph_error; | |
1149 | ||
41df0e30 DS |
1150 | devnull = open("/dev/null", O_WRONLY); |
1151 | f = hashfd(devnull, NULL); | |
1152 | hashwrite(f, g->data, g->data_len - g->hash_len); | |
1153 | finalize_hashfile(f, checksum.hash, CSUM_CLOSE); | |
67947c34 | 1154 | if (!hasheq(checksum.hash, g->data + g->data_len - g->hash_len)) { |
41df0e30 DS |
1155 | graph_report(_("the commit-graph file has incorrect checksum and is likely corrupt")); |
1156 | verify_commit_graph_error = VERIFY_COMMIT_GRAPH_ERROR_HASH; | |
1157 | } | |
1158 | ||
9bda8467 | 1159 | for (i = 0; i < g->num_commits; i++) { |
2e3c0737 DS |
1160 | struct commit *graph_commit; |
1161 | ||
9bda8467 DS |
1162 | hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i); |
1163 | ||
1164 | if (i && oidcmp(&prev_oid, &cur_oid) >= 0) | |
1165 | graph_report("commit-graph has incorrect OID order: %s then %s", | |
1166 | oid_to_hex(&prev_oid), | |
1167 | oid_to_hex(&cur_oid)); | |
1168 | ||
1169 | oidcpy(&prev_oid, &cur_oid); | |
1170 | ||
1171 | while (cur_oid.hash[0] > cur_fanout_pos) { | |
1172 | uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos); | |
1173 | ||
1174 | if (i != fanout_value) | |
1175 | graph_report("commit-graph has incorrect fanout value: fanout[%d] = %u != %u", | |
1176 | cur_fanout_pos, fanout_value, i); | |
1177 | cur_fanout_pos++; | |
1178 | } | |
2e3c0737 | 1179 | |
82952964 | 1180 | graph_commit = lookup_commit(r, &cur_oid); |
4f542b7a | 1181 | if (!parse_commit_in_graph_one(r, g, graph_commit)) |
2e3c0737 DS |
1182 | graph_report("failed to parse %s from commit-graph", |
1183 | oid_to_hex(&cur_oid)); | |
9bda8467 DS |
1184 | } |
1185 | ||
1186 | while (cur_fanout_pos < 256) { | |
1187 | uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos); | |
1188 | ||
1189 | if (g->num_commits != fanout_value) | |
1190 | graph_report("commit-graph has incorrect fanout value: fanout[%d] = %u != %u", | |
1191 | cur_fanout_pos, fanout_value, i); | |
1192 | ||
1193 | cur_fanout_pos++; | |
1194 | } | |
1195 | ||
41df0e30 | 1196 | if (verify_commit_graph_error & ~VERIFY_COMMIT_GRAPH_ERROR_HASH) |
96af91d4 DS |
1197 | return verify_commit_graph_error; |
1198 | ||
1f7f557f ÆAB |
1199 | progress = start_progress(_("Verifying commits in commit graph"), |
1200 | g->num_commits); | |
96af91d4 | 1201 | for (i = 0; i < g->num_commits; i++) { |
2e3c0737 | 1202 | struct commit *graph_commit, *odb_commit; |
53614b13 | 1203 | struct commit_list *graph_parents, *odb_parents; |
1373e547 | 1204 | uint32_t max_generation = 0; |
96af91d4 | 1205 | |
1f7f557f | 1206 | display_progress(progress, i + 1); |
96af91d4 DS |
1207 | hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i); |
1208 | ||
82952964 | 1209 | graph_commit = lookup_commit(r, &cur_oid); |
96af91d4 DS |
1210 | odb_commit = (struct commit *)create_object(r, cur_oid.hash, alloc_commit_node(r)); |
1211 | if (parse_commit_internal(odb_commit, 0, 0)) { | |
1212 | graph_report("failed to parse %s from object database", | |
1213 | oid_to_hex(&cur_oid)); | |
1214 | continue; | |
1215 | } | |
2e3c0737 | 1216 | |
4f542b7a | 1217 | if (!oideq(&get_commit_tree_in_graph_one(r, g, graph_commit)->object.oid, |
2e3c0737 DS |
1218 | get_commit_tree_oid(odb_commit))) |
1219 | graph_report("root tree OID for commit %s in commit-graph is %s != %s", | |
1220 | oid_to_hex(&cur_oid), | |
1221 | oid_to_hex(get_commit_tree_oid(graph_commit)), | |
1222 | oid_to_hex(get_commit_tree_oid(odb_commit))); | |
53614b13 DS |
1223 | |
1224 | graph_parents = graph_commit->parents; | |
1225 | odb_parents = odb_commit->parents; | |
1226 | ||
1227 | while (graph_parents) { | |
1228 | if (odb_parents == NULL) { | |
1229 | graph_report("commit-graph parent list for commit %s is too long", | |
1230 | oid_to_hex(&cur_oid)); | |
1231 | break; | |
1232 | } | |
1233 | ||
9001dc2a | 1234 | if (!oideq(&graph_parents->item->object.oid, &odb_parents->item->object.oid)) |
53614b13 DS |
1235 | graph_report("commit-graph parent for %s is %s != %s", |
1236 | oid_to_hex(&cur_oid), | |
1237 | oid_to_hex(&graph_parents->item->object.oid), | |
1238 | oid_to_hex(&odb_parents->item->object.oid)); | |
1239 | ||
1373e547 DS |
1240 | if (graph_parents->item->generation > max_generation) |
1241 | max_generation = graph_parents->item->generation; | |
1242 | ||
53614b13 DS |
1243 | graph_parents = graph_parents->next; |
1244 | odb_parents = odb_parents->next; | |
1245 | } | |
1246 | ||
1247 | if (odb_parents != NULL) | |
1248 | graph_report("commit-graph parent list for commit %s terminates early", | |
1249 | oid_to_hex(&cur_oid)); | |
1373e547 DS |
1250 | |
1251 | if (!graph_commit->generation) { | |
1252 | if (generation_zero == GENERATION_NUMBER_EXISTS) | |
1253 | graph_report("commit-graph has generation number zero for commit %s, but non-zero elsewhere", | |
1254 | oid_to_hex(&cur_oid)); | |
1255 | generation_zero = GENERATION_ZERO_EXISTS; | |
1256 | } else if (generation_zero == GENERATION_ZERO_EXISTS) | |
1257 | graph_report("commit-graph has non-zero generation number for commit %s, but zero elsewhere", | |
1258 | oid_to_hex(&cur_oid)); | |
1259 | ||
1260 | if (generation_zero == GENERATION_ZERO_EXISTS) | |
1261 | continue; | |
1262 | ||
1263 | /* | |
1264 | * If one of our parents has generation GENERATION_NUMBER_MAX, then | |
1265 | * our generation is also GENERATION_NUMBER_MAX. Decrement to avoid | |
1266 | * extra logic in the following condition. | |
1267 | */ | |
1268 | if (max_generation == GENERATION_NUMBER_MAX) | |
1269 | max_generation--; | |
1270 | ||
1271 | if (graph_commit->generation != max_generation + 1) | |
1272 | graph_report("commit-graph generation for commit %s is %u != %u", | |
1273 | oid_to_hex(&cur_oid), | |
1274 | graph_commit->generation, | |
1275 | max_generation + 1); | |
88968ebf DS |
1276 | |
1277 | if (graph_commit->date != odb_commit->date) | |
1278 | graph_report("commit date for commit %s in commit-graph is %"PRItime" != %"PRItime, | |
1279 | oid_to_hex(&cur_oid), | |
1280 | graph_commit->date, | |
1281 | odb_commit->date); | |
96af91d4 | 1282 | } |
1f7f557f | 1283 | stop_progress(&progress); |
96af91d4 | 1284 | |
283e68c7 DS |
1285 | return verify_commit_graph_error; |
1286 | } | |
c3756d5b JT |
1287 | |
1288 | void free_commit_graph(struct commit_graph *g) | |
1289 | { | |
1290 | if (!g) | |
1291 | return; | |
1292 | if (g->graph_fd >= 0) { | |
1293 | munmap((void *)g->data, g->data_len); | |
1294 | g->data = NULL; | |
1295 | close(g->graph_fd); | |
1296 | } | |
1297 | free(g); | |
1298 | } |