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Commit | Line | Data |
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b6fdc44c | 1 | #include "git-compat-util.h" |
fa796530 | 2 | #include "config.h" |
f394e093 | 3 | #include "gettext.h" |
41771fa4 | 4 | #include "hex.h" |
08fd81c9 DS |
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 | 11 | #include "revision.h" |
bc626927 | 12 | #include "hash-lookup.h" |
08fd81c9 | 13 | #include "commit-graph.h" |
87bed179 | 14 | #include "object-file.h" |
a034e910 | 15 | #include "object-store-ll.h" |
6f2d7430 | 16 | #include "oid-array.h" |
c339932b | 17 | #include "path.h" |
96af91d4 | 18 | #include "alloc.h" |
d6538246 DS |
19 | #include "hashmap.h" |
20 | #include "replace-object.h" | |
7b0f2292 | 21 | #include "progress.h" |
f97b9325 | 22 | #include "bloom.h" |
d21ee7d1 | 23 | #include "commit-slab.h" |
120ad2b0 | 24 | #include "shallow.h" |
0087a87b DS |
25 | #include "json-writer.h" |
26 | #include "trace2.h" | |
d4a4f929 | 27 | #include "tree.h" |
47410aa8 | 28 | #include "chunk-format.h" |
08fd81c9 | 29 | |
b23ea979 DS |
30 | void git_test_write_commit_graph_or_die(void) |
31 | { | |
32 | int flags = 0; | |
33 | if (!git_env_bool(GIT_TEST_COMMIT_GRAPH, 0)) | |
34 | return; | |
35 | ||
36 | if (git_env_bool(GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS, 0)) | |
37 | flags = COMMIT_GRAPH_WRITE_BLOOM_FILTERS; | |
38 | ||
39 | if (write_commit_graph_reachable(the_repository->objects->odb, | |
40 | flags, NULL)) | |
41 | die("failed to write commit-graph under GIT_TEST_COMMIT_GRAPH"); | |
42 | } | |
43 | ||
08fd81c9 DS |
44 | #define GRAPH_SIGNATURE 0x43475048 /* "CGPH" */ |
45 | #define GRAPH_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */ | |
46 | #define GRAPH_CHUNKID_OIDLOOKUP 0x4f49444c /* "OIDL" */ | |
47 | #define GRAPH_CHUNKID_DATA 0x43444154 /* "CDAT" */ | |
6dbf4b81 DS |
48 | #define GRAPH_CHUNKID_GENERATION_DATA 0x47444132 /* "GDA2" */ |
49 | #define GRAPH_CHUNKID_GENERATION_DATA_OVERFLOW 0x47444f32 /* "GDO2" */ | |
5af7417b | 50 | #define GRAPH_CHUNKID_EXTRAEDGES 0x45444745 /* "EDGE" */ |
76ffbca7 GS |
51 | #define GRAPH_CHUNKID_BLOOMINDEXES 0x42494458 /* "BIDX" */ |
52 | #define GRAPH_CHUNKID_BLOOMDATA 0x42444154 /* "BDAT" */ | |
118bd570 | 53 | #define GRAPH_CHUNKID_BASE 0x42415345 /* "BASE" */ |
08fd81c9 | 54 | |
c1665998 | 55 | #define GRAPH_DATA_WIDTH (the_hash_algo->rawsz + 16) |
08fd81c9 DS |
56 | |
57 | #define GRAPH_VERSION_1 0x1 | |
58 | #define GRAPH_VERSION GRAPH_VERSION_1 | |
59 | ||
5af7417b | 60 | #define GRAPH_EXTRA_EDGES_NEEDED 0x80000000 |
08fd81c9 DS |
61 | #define GRAPH_EDGE_LAST_MASK 0x7fffffff |
62 | #define GRAPH_PARENT_NONE 0x70000000 | |
63 | ||
64 | #define GRAPH_LAST_EDGE 0x80000000 | |
65 | ||
0e3b97cc | 66 | #define GRAPH_HEADER_SIZE 8 |
08fd81c9 | 67 | #define GRAPH_FANOUT_SIZE (4 * 256) |
2692c2f6 | 68 | #define GRAPH_MIN_SIZE (GRAPH_HEADER_SIZE + 4 * CHUNK_TOC_ENTRY_SIZE \ |
c1665998 | 69 | + GRAPH_FANOUT_SIZE + the_hash_algo->rawsz) |
08fd81c9 | 70 | |
e8b63005 AK |
71 | #define CORRECTED_COMMIT_DATE_OFFSET_OVERFLOW (1ULL << 31) |
72 | ||
cb99a34e DS |
73 | /* Remember to update object flag allocation in object.h */ |
74 | #define REACHABLE (1u<<15) | |
75 | ||
72a2bfca AK |
76 | define_commit_slab(topo_level_slab, uint32_t); |
77 | ||
d21ee7d1 JK |
78 | /* Keep track of the order in which commits are added to our list. */ |
79 | define_commit_slab(commit_pos, int); | |
80 | static struct commit_pos commit_pos = COMMIT_SLAB_INIT(1, commit_pos); | |
81 | ||
82 | static void set_commit_pos(struct repository *r, const struct object_id *oid) | |
83 | { | |
84 | static int32_t max_pos; | |
85 | struct commit *commit = lookup_commit(r, oid); | |
86 | ||
87 | if (!commit) | |
88 | return; /* should never happen, but be lenient */ | |
89 | ||
90 | *commit_pos_at(&commit_pos, commit) = max_pos++; | |
91 | } | |
92 | ||
93 | static int commit_pos_cmp(const void *va, const void *vb) | |
08fd81c9 | 94 | { |
d21ee7d1 JK |
95 | const struct commit *a = *(const struct commit **)va; |
96 | const struct commit *b = *(const struct commit **)vb; | |
97 | return commit_pos_at(&commit_pos, a) - | |
98 | commit_pos_at(&commit_pos, b); | |
99 | } | |
100 | ||
4844812b AK |
101 | define_commit_slab(commit_graph_data_slab, struct commit_graph_data); |
102 | static struct commit_graph_data_slab commit_graph_data_slab = | |
103 | COMMIT_SLAB_INIT(1, commit_graph_data_slab); | |
104 | ||
702110aa DS |
105 | static int get_configured_generation_version(struct repository *r) |
106 | { | |
107 | int version = 2; | |
108 | repo_config_get_int(r, "commitgraph.generationversion", &version); | |
109 | return version; | |
110 | } | |
111 | ||
4844812b AK |
112 | uint32_t commit_graph_position(const struct commit *c) |
113 | { | |
114 | struct commit_graph_data *data = | |
115 | commit_graph_data_slab_peek(&commit_graph_data_slab, c); | |
116 | ||
117 | return data ? data->graph_pos : COMMIT_NOT_FROM_GRAPH; | |
118 | } | |
119 | ||
d7f92784 | 120 | timestamp_t commit_graph_generation(const struct commit *c) |
4844812b AK |
121 | { |
122 | struct commit_graph_data *data = | |
123 | commit_graph_data_slab_peek(&commit_graph_data_slab, c); | |
124 | ||
2ee11f72 DS |
125 | if (data && data->generation) |
126 | return data->generation; | |
4844812b | 127 | |
2ee11f72 | 128 | return GENERATION_NUMBER_INFINITY; |
4844812b AK |
129 | } |
130 | ||
868c9911 TB |
131 | static timestamp_t commit_graph_generation_from_graph(const struct commit *c) |
132 | { | |
133 | struct commit_graph_data *data = | |
134 | commit_graph_data_slab_peek(&commit_graph_data_slab, c); | |
135 | ||
136 | if (!data || data->graph_pos == COMMIT_NOT_FROM_GRAPH) | |
137 | return GENERATION_NUMBER_INFINITY; | |
138 | return data->generation; | |
139 | } | |
140 | ||
4844812b AK |
141 | static struct commit_graph_data *commit_graph_data_at(const struct commit *c) |
142 | { | |
143 | unsigned int i, nth_slab; | |
144 | struct commit_graph_data *data = | |
145 | commit_graph_data_slab_peek(&commit_graph_data_slab, c); | |
146 | ||
147 | if (data) | |
148 | return data; | |
149 | ||
150 | nth_slab = c->index / commit_graph_data_slab.slab_size; | |
151 | data = commit_graph_data_slab_at(&commit_graph_data_slab, c); | |
152 | ||
153 | /* | |
154 | * commit-slab initializes elements with zero, overwrite this with | |
155 | * COMMIT_NOT_FROM_GRAPH for graph_pos. | |
156 | * | |
157 | * We avoid initializing generation with checking if graph position | |
158 | * is not COMMIT_NOT_FROM_GRAPH. | |
159 | */ | |
160 | for (i = 0; i < commit_graph_data_slab.slab_size; i++) { | |
161 | commit_graph_data_slab.slab[nth_slab][i].graph_pos = | |
162 | COMMIT_NOT_FROM_GRAPH; | |
163 | } | |
164 | ||
165 | return data; | |
166 | } | |
167 | ||
e30c5ee7 AK |
168 | /* |
169 | * Should be used only while writing commit-graph as it compares | |
170 | * generation value of commits by directly accessing commit-slab. | |
171 | */ | |
3d112755 GS |
172 | static int commit_gen_cmp(const void *va, const void *vb) |
173 | { | |
174 | const struct commit *a = *(const struct commit **)va; | |
175 | const struct commit *b = *(const struct commit **)vb; | |
176 | ||
d7f92784 AK |
177 | const timestamp_t generation_a = commit_graph_data_at(a)->generation; |
178 | const timestamp_t generation_b = commit_graph_data_at(b)->generation; | |
3d112755 | 179 | /* lower generation commits first */ |
c752ad09 | 180 | if (generation_a < generation_b) |
3d112755 | 181 | return -1; |
c752ad09 | 182 | else if (generation_a > generation_b) |
3d112755 GS |
183 | return 1; |
184 | ||
185 | /* use date as a heuristic when generations are equal */ | |
186 | if (a->date < b->date) | |
187 | return -1; | |
188 | else if (a->date > b->date) | |
189 | return 1; | |
190 | return 0; | |
191 | } | |
192 | ||
d21ee7d1 | 193 | char *get_commit_graph_filename(struct object_directory *obj_dir) |
08fd81c9 | 194 | { |
d21ee7d1 | 195 | return xstrfmt("%s/info/commit-graph", obj_dir->path); |
08fd81c9 DS |
196 | } |
197 | ||
ad2dd5bb | 198 | static char *get_split_graph_filename(struct object_directory *odb, |
5c84b339 DS |
199 | const char *oid_hex) |
200 | { | |
ad2dd5bb TB |
201 | return xstrfmt("%s/info/commit-graphs/graph-%s.graph", odb->path, |
202 | oid_hex); | |
5c84b339 DS |
203 | } |
204 | ||
663b2b1b | 205 | char *get_commit_graph_chain_filename(struct object_directory *odb) |
5c84b339 | 206 | { |
ad2dd5bb | 207 | return xstrfmt("%s/info/commit-graphs/commit-graph-chain", odb->path); |
08fd81c9 DS |
208 | } |
209 | ||
2a2e32bd DS |
210 | static struct commit_graph *alloc_commit_graph(void) |
211 | { | |
212 | struct commit_graph *g = xcalloc(1, sizeof(*g)); | |
2a2e32bd DS |
213 | |
214 | return g; | |
215 | } | |
216 | ||
d6538246 DS |
217 | static int commit_graph_compatible(struct repository *r) |
218 | { | |
5cef295f DS |
219 | if (!r->gitdir) |
220 | return 0; | |
221 | ||
f1178380 | 222 | if (replace_refs_enabled(r)) { |
d6538246 | 223 | prepare_replace_object(r); |
cdc986a7 | 224 | if (hashmap_get_size(&r->objects->replace_map->map)) |
d6538246 DS |
225 | return 0; |
226 | } | |
227 | ||
20fd6d57 | 228 | prepare_commit_graft(r); |
ce16364e | 229 | if (r->parsed_objects && |
cdc986a7 | 230 | (r->parsed_objects->grafts_nr || r->parsed_objects->substituted_parent)) |
20fd6d57 | 231 | return 0; |
cdc986a7 | 232 | if (is_repository_shallow(r)) |
20fd6d57 DS |
233 | return 0; |
234 | ||
d6538246 DS |
235 | return 1; |
236 | } | |
237 | ||
61df89c8 ÆAB |
238 | int open_commit_graph(const char *graph_file, int *fd, struct stat *st) |
239 | { | |
240 | *fd = git_open(graph_file); | |
241 | if (*fd < 0) | |
242 | return 0; | |
243 | if (fstat(*fd, st)) { | |
244 | close(*fd); | |
245 | return 0; | |
246 | } | |
247 | return 1; | |
248 | } | |
249 | ||
ab14d067 TB |
250 | struct commit_graph *load_commit_graph_one_fd_st(struct repository *r, |
251 | int fd, struct stat *st, | |
a7df60ca | 252 | struct object_directory *odb) |
2a2e32bd DS |
253 | { |
254 | void *graph_map; | |
2a2e32bd | 255 | size_t graph_size; |
aa658574 | 256 | struct commit_graph *ret; |
2a2e32bd | 257 | |
61df89c8 | 258 | graph_size = xsize_t(st->st_size); |
2a2e32bd DS |
259 | |
260 | if (graph_size < GRAPH_MIN_SIZE) { | |
261 | close(fd); | |
67a530fa | 262 | error(_("commit-graph file is too small")); |
61df89c8 | 263 | return NULL; |
2a2e32bd DS |
264 | } |
265 | graph_map = xmmap(NULL, graph_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
c8828530 | 266 | close(fd); |
a92d8523 TB |
267 | prepare_repo_settings(r); |
268 | ret = parse_commit_graph(&r->settings, graph_map, graph_size); | |
aa658574 | 269 | |
a7df60ca TB |
270 | if (ret) |
271 | ret->odb = odb; | |
c8828530 | 272 | else |
aa658574 | 273 | munmap(graph_map, graph_size); |
aa658574 JS |
274 | |
275 | return ret; | |
276 | } | |
277 | ||
2ac138d5 ÆAB |
278 | static int verify_commit_graph_lite(struct commit_graph *g) |
279 | { | |
280 | /* | |
281 | * Basic validation shared between parse_commit_graph() | |
282 | * which'll be called every time the graph is used, and the | |
283 | * much more expensive verify_commit_graph() used by | |
284 | * "commit-graph verify". | |
285 | * | |
286 | * There should only be very basic checks here to ensure that | |
287 | * we don't e.g. segfault in fill_commit_in_graph(), but | |
288 | * because this is a very hot codepath nothing that e.g. loops | |
289 | * over g->num_commits, or runs a checksum on the commit-graph | |
290 | * itself. | |
291 | */ | |
292 | if (!g->chunk_oid_fanout) { | |
293 | error("commit-graph is missing the OID Fanout chunk"); | |
294 | return 1; | |
295 | } | |
296 | if (!g->chunk_oid_lookup) { | |
297 | error("commit-graph is missing the OID Lookup chunk"); | |
298 | return 1; | |
299 | } | |
300 | if (!g->chunk_commit_data) { | |
301 | error("commit-graph is missing the Commit Data chunk"); | |
302 | return 1; | |
303 | } | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
2692c2f6 DS |
308 | static int graph_read_oid_lookup(const unsigned char *chunk_start, |
309 | size_t chunk_size, void *data) | |
310 | { | |
311 | struct commit_graph *g = data; | |
312 | g->chunk_oid_lookup = chunk_start; | |
313 | g->num_commits = chunk_size / g->hash_len; | |
314 | return 0; | |
315 | } | |
316 | ||
317 | static int graph_read_bloom_data(const unsigned char *chunk_start, | |
318 | size_t chunk_size, void *data) | |
319 | { | |
320 | struct commit_graph *g = data; | |
321 | uint32_t hash_version; | |
322 | g->chunk_bloom_data = chunk_start; | |
323 | hash_version = get_be32(chunk_start); | |
324 | ||
325 | if (hash_version != 1) | |
326 | return 0; | |
327 | ||
328 | g->bloom_filter_settings = xmalloc(sizeof(struct bloom_filter_settings)); | |
329 | g->bloom_filter_settings->hash_version = hash_version; | |
330 | g->bloom_filter_settings->num_hashes = get_be32(chunk_start + 4); | |
331 | g->bloom_filter_settings->bits_per_entry = get_be32(chunk_start + 8); | |
332 | g->bloom_filter_settings->max_changed_paths = DEFAULT_BLOOM_MAX_CHANGES; | |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
a92d8523 | 337 | struct commit_graph *parse_commit_graph(struct repo_settings *s, |
ab14d067 | 338 | void *graph_map, size_t graph_size) |
aa658574 | 339 | { |
2692c2f6 | 340 | const unsigned char *data; |
aa658574 | 341 | struct commit_graph *graph; |
aa658574 JS |
342 | uint32_t graph_signature; |
343 | unsigned char graph_version, hash_version; | |
2692c2f6 | 344 | struct chunkfile *cf = NULL; |
aa658574 JS |
345 | |
346 | if (!graph_map) | |
347 | return NULL; | |
348 | ||
349 | if (graph_size < GRAPH_MIN_SIZE) | |
350 | return NULL; | |
351 | ||
2a2e32bd DS |
352 | data = (const unsigned char *)graph_map; |
353 | ||
354 | graph_signature = get_be32(data); | |
355 | if (graph_signature != GRAPH_SIGNATURE) { | |
93b4405f | 356 | error(_("commit-graph signature %X does not match signature %X"), |
2a2e32bd | 357 | graph_signature, GRAPH_SIGNATURE); |
aa658574 | 358 | return NULL; |
2a2e32bd DS |
359 | } |
360 | ||
361 | graph_version = *(unsigned char*)(data + 4); | |
362 | if (graph_version != GRAPH_VERSION) { | |
93b4405f | 363 | error(_("commit-graph version %X does not match version %X"), |
2a2e32bd | 364 | graph_version, GRAPH_VERSION); |
aa658574 | 365 | return NULL; |
2a2e32bd DS |
366 | } |
367 | ||
368 | hash_version = *(unsigned char*)(data + 5); | |
d9fef9d9 | 369 | if (hash_version != oid_version(the_hash_algo)) { |
93b4405f | 370 | error(_("commit-graph hash version %X does not match version %X"), |
d9fef9d9 | 371 | hash_version, oid_version(the_hash_algo)); |
aa658574 | 372 | return NULL; |
2a2e32bd DS |
373 | } |
374 | ||
375 | graph = alloc_commit_graph(); | |
376 | ||
c1665998 | 377 | graph->hash_len = the_hash_algo->rawsz; |
2a2e32bd | 378 | graph->num_chunks = *(unsigned char*)(data + 6); |
2a2e32bd DS |
379 | graph->data = graph_map; |
380 | graph->data_len = graph_size; | |
381 | ||
2ad4f1a7 | 382 | if (graph_size < GRAPH_HEADER_SIZE + |
2692c2f6 | 383 | (graph->num_chunks + 1) * CHUNK_TOC_ENTRY_SIZE + |
2ad4f1a7 SG |
384 | GRAPH_FANOUT_SIZE + the_hash_algo->rawsz) { |
385 | error(_("commit-graph file is too small to hold %u chunks"), | |
386 | graph->num_chunks); | |
387 | free(graph); | |
388 | return NULL; | |
389 | } | |
390 | ||
2692c2f6 | 391 | cf = init_chunkfile(NULL); |
118bd570 | 392 | |
2692c2f6 DS |
393 | if (read_table_of_contents(cf, graph->data, graph_size, |
394 | GRAPH_HEADER_SIZE, graph->num_chunks)) | |
395 | goto free_and_return; | |
2a2e32bd | 396 | |
2692c2f6 DS |
397 | pair_chunk(cf, GRAPH_CHUNKID_OIDFANOUT, |
398 | (const unsigned char **)&graph->chunk_oid_fanout); | |
399 | read_chunk(cf, GRAPH_CHUNKID_OIDLOOKUP, graph_read_oid_lookup, graph); | |
400 | pair_chunk(cf, GRAPH_CHUNKID_DATA, &graph->chunk_commit_data); | |
401 | pair_chunk(cf, GRAPH_CHUNKID_EXTRAEDGES, &graph->chunk_extra_edges); | |
402 | pair_chunk(cf, GRAPH_CHUNKID_BASE, &graph->chunk_base_graphs); | |
702110aa | 403 | |
a92d8523 | 404 | if (s->commit_graph_generation_version >= 2) { |
702110aa DS |
405 | pair_chunk(cf, GRAPH_CHUNKID_GENERATION_DATA, |
406 | &graph->chunk_generation_data); | |
407 | pair_chunk(cf, GRAPH_CHUNKID_GENERATION_DATA_OVERFLOW, | |
408 | &graph->chunk_generation_data_overflow); | |
3b0199d4 DS |
409 | |
410 | if (graph->chunk_generation_data) | |
411 | graph->read_generation_data = 1; | |
702110aa | 412 | } |
2692c2f6 | 413 | |
a92d8523 | 414 | if (s->commit_graph_read_changed_paths) { |
2692c2f6 DS |
415 | pair_chunk(cf, GRAPH_CHUNKID_BLOOMINDEXES, |
416 | &graph->chunk_bloom_indexes); | |
417 | read_chunk(cf, GRAPH_CHUNKID_BLOOMDATA, | |
418 | graph_read_bloom_data, graph); | |
2a2e32bd DS |
419 | } |
420 | ||
76ffbca7 GS |
421 | if (graph->chunk_bloom_indexes && graph->chunk_bloom_data) { |
422 | init_bloom_filters(); | |
423 | } else { | |
424 | /* We need both the bloom chunks to exist together. Else ignore the data */ | |
425 | graph->chunk_bloom_indexes = NULL; | |
426 | graph->chunk_bloom_data = NULL; | |
fbda77c6 | 427 | FREE_AND_NULL(graph->bloom_filter_settings); |
76ffbca7 GS |
428 | } |
429 | ||
92e2cab9 | 430 | oidread(&graph->oid, graph->data + graph->data_len - graph->hash_len); |
118bd570 | 431 | |
fbda77c6 JT |
432 | if (verify_commit_graph_lite(graph)) |
433 | goto free_and_return; | |
2ac138d5 | 434 | |
2692c2f6 | 435 | free_chunkfile(cf); |
2a2e32bd | 436 | return graph; |
fbda77c6 JT |
437 | |
438 | free_and_return: | |
2692c2f6 | 439 | free_chunkfile(cf); |
fbda77c6 JT |
440 | free(graph->bloom_filter_settings); |
441 | free(graph); | |
442 | return NULL; | |
2a2e32bd DS |
443 | } |
444 | ||
ab14d067 TB |
445 | static struct commit_graph *load_commit_graph_one(struct repository *r, |
446 | const char *graph_file, | |
a7df60ca | 447 | struct object_directory *odb) |
61df89c8 ÆAB |
448 | { |
449 | ||
450 | struct stat st; | |
451 | int fd; | |
6c622f9f | 452 | struct commit_graph *g; |
61df89c8 ÆAB |
453 | int open_ok = open_commit_graph(graph_file, &fd, &st); |
454 | ||
455 | if (!open_ok) | |
456 | return NULL; | |
457 | ||
ab14d067 | 458 | g = load_commit_graph_one_fd_st(r, fd, &st, odb); |
6c622f9f DS |
459 | |
460 | if (g) | |
461 | g->filename = xstrdup(graph_file); | |
462 | ||
463 | return g; | |
61df89c8 ÆAB |
464 | } |
465 | ||
13c24992 TB |
466 | static struct commit_graph *load_commit_graph_v1(struct repository *r, |
467 | struct object_directory *odb) | |
5c84b339 | 468 | { |
ad2dd5bb | 469 | char *graph_name = get_commit_graph_filename(odb); |
ab14d067 | 470 | struct commit_graph *g = load_commit_graph_one(r, graph_name, odb); |
5c84b339 DS |
471 | free(graph_name); |
472 | ||
473 | return g; | |
474 | } | |
475 | ||
476 | static int add_graph_to_chain(struct commit_graph *g, | |
477 | struct commit_graph *chain, | |
478 | struct object_id *oids, | |
479 | int n) | |
480 | { | |
481 | struct commit_graph *cur_g = chain; | |
482 | ||
118bd570 DS |
483 | if (n && !g->chunk_base_graphs) { |
484 | warning(_("commit-graph has no base graphs chunk")); | |
485 | return 0; | |
486 | } | |
487 | ||
5c84b339 DS |
488 | while (n) { |
489 | n--; | |
118bd570 DS |
490 | |
491 | if (!cur_g || | |
492 | !oideq(&oids[n], &cur_g->oid) || | |
209250ef | 493 | !hasheq(oids[n].hash, g->chunk_base_graphs + st_mult(g->hash_len, n))) { |
118bd570 DS |
494 | warning(_("commit-graph chain does not match")); |
495 | return 0; | |
496 | } | |
497 | ||
5c84b339 DS |
498 | cur_g = cur_g->base_graph; |
499 | } | |
500 | ||
209250ef TB |
501 | if (chain) { |
502 | if (unsigned_add_overflows(chain->num_commits, | |
503 | chain->num_commits_in_base)) { | |
504 | warning(_("commit count in base graph too high: %"PRIuMAX), | |
505 | (uintmax_t)chain->num_commits_in_base); | |
506 | return 0; | |
507 | } | |
5c84b339 | 508 | g->num_commits_in_base = chain->num_commits + chain->num_commits_in_base; |
209250ef | 509 | } |
5c84b339 | 510 | |
991d549f JK |
511 | g->base_graph = chain; |
512 | ||
5c84b339 DS |
513 | return 1; |
514 | } | |
515 | ||
13c24992 TB |
516 | static struct commit_graph *load_commit_graph_chain(struct repository *r, |
517 | struct object_directory *odb) | |
5c84b339 DS |
518 | { |
519 | struct commit_graph *graph_chain = NULL; | |
520 | struct strbuf line = STRBUF_INIT; | |
521 | struct stat st; | |
522 | struct object_id *oids; | |
523 | int i = 0, valid = 1, count; | |
663b2b1b | 524 | char *chain_name = get_commit_graph_chain_filename(odb); |
5c84b339 DS |
525 | FILE *fp; |
526 | int stat_res; | |
527 | ||
528 | fp = fopen(chain_name, "r"); | |
529 | stat_res = stat(chain_name, &st); | |
530 | free(chain_name); | |
531 | ||
c0befa0c | 532 | if (!fp) |
5c84b339 | 533 | return NULL; |
c0befa0c KT |
534 | if (stat_res || |
535 | st.st_size <= the_hash_algo->hexsz) { | |
536 | fclose(fp); | |
537 | return NULL; | |
538 | } | |
5c84b339 DS |
539 | |
540 | count = st.st_size / (the_hash_algo->hexsz + 1); | |
ca56dadb | 541 | CALLOC_ARRAY(oids, count); |
5c84b339 | 542 | |
c523035c DS |
543 | prepare_alt_odb(r); |
544 | ||
545 | for (i = 0; i < count; i++) { | |
546 | struct object_directory *odb; | |
5c84b339 DS |
547 | |
548 | if (strbuf_getline_lf(&line, fp) == EOF) | |
549 | break; | |
550 | ||
551 | if (get_oid_hex(line.buf, &oids[i])) { | |
552 | warning(_("invalid commit-graph chain: line '%s' not a hash"), | |
553 | line.buf); | |
554 | valid = 0; | |
555 | break; | |
556 | } | |
557 | ||
c523035c DS |
558 | valid = 0; |
559 | for (odb = r->objects->odb; odb; odb = odb->next) { | |
ad2dd5bb | 560 | char *graph_name = get_split_graph_filename(odb, line.buf); |
ab14d067 | 561 | struct commit_graph *g = load_commit_graph_one(r, graph_name, odb); |
5c84b339 | 562 | |
c523035c DS |
563 | free(graph_name); |
564 | ||
565 | if (g) { | |
c523035c DS |
566 | if (add_graph_to_chain(g, graph_chain, oids, i)) { |
567 | graph_chain = g; | |
568 | valid = 1; | |
1d94abfe JK |
569 | } else { |
570 | free_commit_graph(g); | |
c523035c DS |
571 | } |
572 | ||
573 | break; | |
574 | } | |
575 | } | |
576 | ||
577 | if (!valid) { | |
578 | warning(_("unable to find all commit-graph files")); | |
579 | break; | |
580 | } | |
5c84b339 DS |
581 | } |
582 | ||
583 | free(oids); | |
584 | fclose(fp); | |
0aa6bce7 | 585 | strbuf_release(&line); |
5c84b339 DS |
586 | |
587 | return graph_chain; | |
588 | } | |
589 | ||
448a39e6 DS |
590 | /* |
591 | * returns 1 if and only if all graphs in the chain have | |
592 | * corrected commit dates stored in the generation_data chunk. | |
593 | */ | |
594 | static int validate_mixed_generation_chain(struct commit_graph *g) | |
1fdc383c | 595 | { |
448a39e6 DS |
596 | int read_generation_data = 1; |
597 | struct commit_graph *p = g; | |
1fdc383c | 598 | |
448a39e6 DS |
599 | while (read_generation_data && p) { |
600 | read_generation_data = p->read_generation_data; | |
601 | p = p->base_graph; | |
602 | } | |
1fdc383c | 603 | |
448a39e6 DS |
604 | if (read_generation_data) |
605 | return 1; | |
1fdc383c AK |
606 | |
607 | while (g) { | |
448a39e6 | 608 | g->read_generation_data = 0; |
1fdc383c AK |
609 | g = g->base_graph; |
610 | } | |
448a39e6 DS |
611 | |
612 | return 0; | |
1fdc383c AK |
613 | } |
614 | ||
13c24992 TB |
615 | struct commit_graph *read_commit_graph_one(struct repository *r, |
616 | struct object_directory *odb) | |
5c84b339 | 617 | { |
13c24992 | 618 | struct commit_graph *g = load_commit_graph_v1(r, odb); |
5c84b339 DS |
619 | |
620 | if (!g) | |
13c24992 | 621 | g = load_commit_graph_chain(r, odb); |
5c84b339 | 622 | |
1fdc383c AK |
623 | validate_mixed_generation_chain(g); |
624 | ||
5c84b339 | 625 | return g; |
61df89c8 ÆAB |
626 | } |
627 | ||
13c24992 TB |
628 | static void prepare_commit_graph_one(struct repository *r, |
629 | struct object_directory *odb) | |
177722b3 | 630 | { |
177722b3 | 631 | |
dade47c0 | 632 | if (r->objects->commit_graph) |
177722b3 DS |
633 | return; |
634 | ||
13c24992 | 635 | r->objects->commit_graph = read_commit_graph_one(r, odb); |
177722b3 DS |
636 | } |
637 | ||
5faf357b JT |
638 | /* |
639 | * Return 1 if commit_graph is non-NULL, and 0 otherwise. | |
640 | * | |
15beaaa3 | 641 | * On the first invocation, this function attempts to load the commit |
5faf357b JT |
642 | * graph if the_repository is configured to have one. |
643 | */ | |
dade47c0 | 644 | static int prepare_commit_graph(struct repository *r) |
177722b3 | 645 | { |
263db403 | 646 | struct object_directory *odb; |
dade47c0 | 647 | |
6abada18 | 648 | /* |
0803f9c7 LD |
649 | * Early return if there is no git dir or if the commit graph is |
650 | * disabled. | |
651 | * | |
6abada18 JK |
652 | * This must come before the "already attempted?" check below, because |
653 | * we want to disable even an already-loaded graph file. | |
654 | */ | |
0803f9c7 | 655 | if (!r->gitdir || r->commit_graph_disabled) |
6abada18 | 656 | return 0; |
43d35618 | 657 | |
dade47c0 JT |
658 | if (r->objects->commit_graph_attempted) |
659 | return !!r->objects->commit_graph; | |
660 | r->objects->commit_graph_attempted = 1; | |
661 | ||
7211b9e7 DS |
662 | prepare_repo_settings(r); |
663 | ||
859fdc0c | 664 | if (!git_env_bool(GIT_TEST_COMMIT_GRAPH, 0) && |
7211b9e7 | 665 | r->settings.core_commit_graph != 1) |
dade47c0 JT |
666 | /* |
667 | * This repository is not configured to use commit graphs, so | |
668 | * do not load one. (But report commit_graph_attempted anyway | |
669 | * so that commit graph loading is not attempted again for this | |
670 | * repository.) | |
671 | */ | |
5faf357b JT |
672 | return 0; |
673 | ||
d6538246 DS |
674 | if (!commit_graph_compatible(r)) |
675 | return 0; | |
676 | ||
dade47c0 | 677 | prepare_alt_odb(r); |
f0eaf638 | 678 | for (odb = r->objects->odb; |
263db403 JK |
679 | !r->objects->commit_graph && odb; |
680 | odb = odb->next) | |
13c24992 | 681 | prepare_commit_graph_one(r, odb); |
dade47c0 | 682 | return !!r->objects->commit_graph; |
177722b3 DS |
683 | } |
684 | ||
6cc01743 DS |
685 | int generation_numbers_enabled(struct repository *r) |
686 | { | |
687 | uint32_t first_generation; | |
688 | struct commit_graph *g; | |
689 | if (!prepare_commit_graph(r)) | |
690 | return 0; | |
691 | ||
692 | g = r->objects->commit_graph; | |
693 | ||
694 | if (!g->num_commits) | |
695 | return 0; | |
696 | ||
697 | first_generation = get_be32(g->chunk_commit_data + | |
698 | g->hash_len + 8) >> 2; | |
699 | ||
700 | return !!first_generation; | |
701 | } | |
702 | ||
8d00d7c3 AK |
703 | int corrected_commit_dates_enabled(struct repository *r) |
704 | { | |
705 | struct commit_graph *g; | |
706 | if (!prepare_commit_graph(r)) | |
707 | return 0; | |
708 | ||
709 | g = r->objects->commit_graph; | |
710 | ||
711 | if (!g->num_commits) | |
712 | return 0; | |
713 | ||
714 | return g->read_generation_data; | |
715 | } | |
716 | ||
4f364405 TB |
717 | struct bloom_filter_settings *get_bloom_filter_settings(struct repository *r) |
718 | { | |
719 | struct commit_graph *g = r->objects->commit_graph; | |
720 | while (g) { | |
721 | if (g->bloom_filter_settings) | |
722 | return g->bloom_filter_settings; | |
723 | g = g->base_graph; | |
724 | } | |
725 | return NULL; | |
726 | } | |
727 | ||
c3a3a964 | 728 | void close_commit_graph(struct raw_object_store *o) |
177722b3 | 729 | { |
ac6d45d1 | 730 | clear_commit_graph_data_slab(&commit_graph_data_slab); |
09a75abb | 731 | free_commit_graph(o->commit_graph); |
c3a3a964 | 732 | o->commit_graph = NULL; |
177722b3 DS |
733 | } |
734 | ||
809ea28f | 735 | static int bsearch_graph(struct commit_graph *g, const struct object_id *oid, uint32_t *pos) |
177722b3 DS |
736 | { |
737 | return bsearch_hash(oid->hash, g->chunk_oid_fanout, | |
738 | g->chunk_oid_lookup, g->hash_len, pos); | |
739 | } | |
740 | ||
d4f4d60f DS |
741 | static void load_oid_from_graph(struct commit_graph *g, |
742 | uint32_t pos, | |
743 | struct object_id *oid) | |
744 | { | |
745 | uint32_t lex_index; | |
746 | ||
747 | while (g && pos < g->num_commits_in_base) | |
748 | g = g->base_graph; | |
749 | ||
750 | if (!g) | |
751 | BUG("NULL commit-graph"); | |
752 | ||
753 | if (pos >= g->num_commits + g->num_commits_in_base) | |
754 | die(_("invalid commit position. commit-graph is likely corrupt")); | |
755 | ||
756 | lex_index = pos - g->num_commits_in_base; | |
757 | ||
0bd8f30a | 758 | oidread(oid, g->chunk_oid_lookup + st_mult(g->hash_len, lex_index)); |
d4f4d60f DS |
759 | } |
760 | ||
4f542b7a SB |
761 | static struct commit_list **insert_parent_or_die(struct repository *r, |
762 | struct commit_graph *g, | |
d4f4d60f | 763 | uint32_t pos, |
177722b3 DS |
764 | struct commit_list **pptr) |
765 | { | |
766 | struct commit *c; | |
767 | struct object_id oid; | |
96af91d4 | 768 | |
d4f4d60f DS |
769 | if (pos >= g->num_commits + g->num_commits_in_base) |
770 | die("invalid parent position %"PRIu32, pos); | |
53614b13 | 771 | |
d4f4d60f | 772 | load_oid_from_graph(g, pos, &oid); |
4f542b7a | 773 | c = lookup_commit(r, &oid); |
177722b3 | 774 | if (!c) |
4f5b532d | 775 | die(_("could not find commit %s"), oid_to_hex(&oid)); |
c49c82aa | 776 | commit_graph_data_at(c)->graph_pos = pos; |
177722b3 DS |
777 | return &commit_list_insert(c, pptr)->next; |
778 | } | |
779 | ||
e2838d85 DS |
780 | static void fill_commit_graph_info(struct commit *item, struct commit_graph *g, uint32_t pos) |
781 | { | |
d4f4d60f | 782 | const unsigned char *commit_data; |
c752ad09 | 783 | struct commit_graph_data *graph_data; |
e8b63005 AK |
784 | uint32_t lex_index, offset_pos; |
785 | uint64_t date_high, date_low, offset; | |
d4f4d60f DS |
786 | |
787 | while (pos < g->num_commits_in_base) | |
788 | g = g->base_graph; | |
789 | ||
f90fca63 AK |
790 | if (pos >= g->num_commits + g->num_commits_in_base) |
791 | die(_("invalid commit position. commit-graph is likely corrupt")); | |
792 | ||
d4f4d60f | 793 | lex_index = pos - g->num_commits_in_base; |
2740ed1c | 794 | commit_data = g->chunk_commit_data + st_mult(GRAPH_DATA_WIDTH, lex_index); |
c752ad09 AK |
795 | |
796 | graph_data = commit_graph_data_at(item); | |
797 | graph_data->graph_pos = pos; | |
f90fca63 AK |
798 | |
799 | date_high = get_be32(commit_data + g->hash_len + 8) & 0x3; | |
800 | date_low = get_be32(commit_data + g->hash_len + 12); | |
801 | item->date = (timestamp_t)((date_high << 32) | date_low); | |
802 | ||
1fdc383c | 803 | if (g->read_generation_data) { |
2740ed1c | 804 | offset = (timestamp_t)get_be32(g->chunk_generation_data + st_mult(sizeof(uint32_t), lex_index)); |
e8b63005 AK |
805 | |
806 | if (offset & CORRECTED_COMMIT_DATE_OFFSET_OVERFLOW) { | |
807 | if (!g->chunk_generation_data_overflow) | |
808 | die(_("commit-graph requires overflow generation data but has none")); | |
809 | ||
810 | offset_pos = offset ^ CORRECTED_COMMIT_DATE_OFFSET_OVERFLOW; | |
2740ed1c | 811 | graph_data->generation = item->date + get_be64(g->chunk_generation_data_overflow + st_mult(8, offset_pos)); |
e8b63005 AK |
812 | } else |
813 | graph_data->generation = item->date + offset; | |
814 | } else | |
815 | graph_data->generation = get_be32(commit_data + g->hash_len + 8) >> 2; | |
72a2bfca AK |
816 | |
817 | if (g->topo_levels) | |
818 | *topo_level_slab_at(g->topo_levels, item) = get_be32(commit_data + g->hash_len + 8) >> 2; | |
e2838d85 DS |
819 | } |
820 | ||
a133c40b NTND |
821 | static inline void set_commit_tree(struct commit *c, struct tree *t) |
822 | { | |
823 | c->maybe_tree = t; | |
824 | } | |
825 | ||
4f542b7a SB |
826 | static int fill_commit_in_graph(struct repository *r, |
827 | struct commit *item, | |
828 | struct commit_graph *g, uint32_t pos) | |
177722b3 | 829 | { |
177722b3 DS |
830 | uint32_t edge_value; |
831 | uint32_t *parent_data_ptr; | |
177722b3 | 832 | struct commit_list **pptr; |
d4f4d60f DS |
833 | const unsigned char *commit_data; |
834 | uint32_t lex_index; | |
177722b3 | 835 | |
d4f4d60f DS |
836 | while (pos < g->num_commits_in_base) |
837 | g = g->base_graph; | |
838 | ||
f90fca63 | 839 | fill_commit_graph_info(item, g, pos); |
d4f4d60f | 840 | |
d4f4d60f | 841 | lex_index = pos - g->num_commits_in_base; |
50a71c29 | 842 | commit_data = g->chunk_commit_data + st_mult(g->hash_len + 16, lex_index); |
d4f4d60f DS |
843 | |
844 | item->object.parsed = 1; | |
177722b3 | 845 | |
a133c40b | 846 | set_commit_tree(item, NULL); |
177722b3 | 847 | |
177722b3 DS |
848 | pptr = &item->parents; |
849 | ||
850 | edge_value = get_be32(commit_data + g->hash_len); | |
851 | if (edge_value == GRAPH_PARENT_NONE) | |
852 | return 1; | |
4f542b7a | 853 | pptr = insert_parent_or_die(r, g, edge_value, pptr); |
177722b3 DS |
854 | |
855 | edge_value = get_be32(commit_data + g->hash_len + 4); | |
856 | if (edge_value == GRAPH_PARENT_NONE) | |
857 | return 1; | |
5af7417b | 858 | if (!(edge_value & GRAPH_EXTRA_EDGES_NEEDED)) { |
4f542b7a | 859 | pptr = insert_parent_or_die(r, g, edge_value, pptr); |
177722b3 DS |
860 | return 1; |
861 | } | |
862 | ||
5af7417b | 863 | parent_data_ptr = (uint32_t*)(g->chunk_extra_edges + |
50a71c29 | 864 | st_mult(4, edge_value & GRAPH_EDGE_LAST_MASK)); |
177722b3 DS |
865 | do { |
866 | edge_value = get_be32(parent_data_ptr); | |
4f542b7a | 867 | pptr = insert_parent_or_die(r, g, |
177722b3 DS |
868 | edge_value & GRAPH_EDGE_LAST_MASK, |
869 | pptr); | |
870 | parent_data_ptr++; | |
871 | } while (!(edge_value & GRAPH_LAST_EDGE)); | |
872 | ||
873 | return 1; | |
874 | } | |
875 | ||
809ea28f PS |
876 | static int search_commit_pos_in_graph(const struct object_id *id, struct commit_graph *g, uint32_t *pos) |
877 | { | |
878 | struct commit_graph *cur_g = g; | |
879 | uint32_t lex_index; | |
880 | ||
881 | while (cur_g && !bsearch_graph(cur_g, id, &lex_index)) | |
882 | cur_g = cur_g->base_graph; | |
883 | ||
884 | if (cur_g) { | |
885 | *pos = lex_index + cur_g->num_commits_in_base; | |
886 | return 1; | |
887 | } | |
888 | ||
889 | return 0; | |
890 | } | |
891 | ||
892 | static int find_commit_pos_in_graph(struct commit *item, struct commit_graph *g, uint32_t *pos) | |
e2838d85 | 893 | { |
c752ad09 AK |
894 | uint32_t graph_pos = commit_graph_position(item); |
895 | if (graph_pos != COMMIT_NOT_FROM_GRAPH) { | |
896 | *pos = graph_pos; | |
e2838d85 DS |
897 | return 1; |
898 | } else { | |
809ea28f | 899 | return search_commit_pos_in_graph(&item->object.oid, g, pos); |
e2838d85 DS |
900 | } |
901 | } | |
902 | ||
7805360b TB |
903 | int repo_find_commit_pos_in_graph(struct repository *r, struct commit *c, |
904 | uint32_t *pos) | |
905 | { | |
906 | if (!prepare_commit_graph(r)) | |
907 | return 0; | |
908 | return find_commit_pos_in_graph(c, r->objects->commit_graph, pos); | |
909 | } | |
910 | ||
f559d6d4 PS |
911 | struct commit *lookup_commit_in_graph(struct repository *repo, const struct object_id *id) |
912 | { | |
913 | struct commit *commit; | |
914 | uint32_t pos; | |
915 | ||
d6045294 | 916 | if (!prepare_commit_graph(repo)) |
f559d6d4 PS |
917 | return NULL; |
918 | if (!search_commit_pos_in_graph(id, repo->objects->commit_graph, &pos)) | |
919 | return NULL; | |
3a1ea94a | 920 | if (!has_object(repo, id, 0)) |
f559d6d4 PS |
921 | return NULL; |
922 | ||
923 | commit = lookup_commit(repo, id); | |
924 | if (!commit) | |
925 | return NULL; | |
926 | if (commit->object.parsed) | |
927 | return commit; | |
928 | ||
929 | if (!fill_commit_in_graph(repo, commit, repo->objects->commit_graph, pos)) | |
930 | return NULL; | |
931 | ||
932 | return commit; | |
933 | } | |
934 | ||
4f542b7a SB |
935 | static int parse_commit_in_graph_one(struct repository *r, |
936 | struct commit_graph *g, | |
937 | struct commit *item) | |
177722b3 | 938 | { |
e2838d85 DS |
939 | uint32_t pos; |
940 | ||
177722b3 DS |
941 | if (item->object.parsed) |
942 | return 1; | |
ee797053 | 943 | |
809ea28f | 944 | if (find_commit_pos_in_graph(item, g, &pos)) |
4f542b7a | 945 | return fill_commit_in_graph(r, item, g, pos); |
ee797053 DS |
946 | |
947 | return 0; | |
948 | } | |
949 | ||
dade47c0 | 950 | int parse_commit_in_graph(struct repository *r, struct commit *item) |
ee797053 | 951 | { |
7b671f8c DS |
952 | static int checked_env = 0; |
953 | ||
954 | if (!checked_env && | |
955 | git_env_bool(GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE, 0)) | |
956 | die("dying as requested by the '%s' variable on commit-graph parse!", | |
957 | GIT_TEST_COMMIT_GRAPH_DIE_ON_PARSE); | |
958 | checked_env = 1; | |
959 | ||
dade47c0 | 960 | if (!prepare_commit_graph(r)) |
ee797053 | 961 | return 0; |
4f542b7a | 962 | return parse_commit_in_graph_one(r, r->objects->commit_graph, item); |
177722b3 DS |
963 | } |
964 | ||
dade47c0 | 965 | void load_commit_graph_info(struct repository *r, struct commit *item) |
e2838d85 DS |
966 | { |
967 | uint32_t pos; | |
7805360b | 968 | if (repo_find_commit_pos_in_graph(r, item, &pos)) |
dade47c0 | 969 | fill_commit_graph_info(item, r->objects->commit_graph, pos); |
e2838d85 DS |
970 | } |
971 | ||
4f542b7a SB |
972 | static struct tree *load_tree_for_commit(struct repository *r, |
973 | struct commit_graph *g, | |
974 | struct commit *c) | |
7b8a21db DS |
975 | { |
976 | struct object_id oid; | |
d4f4d60f | 977 | const unsigned char *commit_data; |
c752ad09 | 978 | uint32_t graph_pos = commit_graph_position(c); |
d4f4d60f | 979 | |
c752ad09 | 980 | while (graph_pos < g->num_commits_in_base) |
d4f4d60f DS |
981 | g = g->base_graph; |
982 | ||
983 | commit_data = g->chunk_commit_data + | |
51c31a64 | 984 | st_mult(GRAPH_DATA_WIDTH, graph_pos - g->num_commits_in_base); |
7b8a21db | 985 | |
92e2cab9 | 986 | oidread(&oid, commit_data); |
a133c40b | 987 | set_commit_tree(c, lookup_tree(r, &oid)); |
7b8a21db DS |
988 | |
989 | return c->maybe_tree; | |
990 | } | |
991 | ||
4f542b7a SB |
992 | static struct tree *get_commit_tree_in_graph_one(struct repository *r, |
993 | struct commit_graph *g, | |
0cbef8f8 | 994 | const struct commit *c) |
7b8a21db DS |
995 | { |
996 | if (c->maybe_tree) | |
997 | return c->maybe_tree; | |
c49c82aa | 998 | if (commit_graph_position(c) == COMMIT_NOT_FROM_GRAPH) |
0cbef8f8 DS |
999 | BUG("get_commit_tree_in_graph_one called from non-commit-graph commit"); |
1000 | ||
4f542b7a | 1001 | return load_tree_for_commit(r, g, (struct commit *)c); |
0cbef8f8 | 1002 | } |
7b8a21db | 1003 | |
dade47c0 | 1004 | struct tree *get_commit_tree_in_graph(struct repository *r, const struct commit *c) |
0cbef8f8 | 1005 | { |
4f542b7a | 1006 | return get_commit_tree_in_graph_one(r, r->objects->commit_graph, c); |
7b8a21db DS |
1007 | } |
1008 | ||
c9905bea DS |
1009 | struct packed_commit_list { |
1010 | struct commit **list; | |
3361390c JK |
1011 | size_t nr; |
1012 | size_t alloc; | |
c9905bea DS |
1013 | }; |
1014 | ||
c9905bea DS |
1015 | struct write_commit_graph_context { |
1016 | struct repository *r; | |
0bd52e27 | 1017 | struct object_directory *odb; |
c9905bea | 1018 | char *graph_name; |
a5f1c448 | 1019 | struct oid_array oids; |
c9905bea DS |
1020 | struct packed_commit_list commits; |
1021 | int num_extra_edges; | |
e8b63005 | 1022 | int num_generation_data_overflows; |
c9905bea DS |
1023 | unsigned long approx_nr_objects; |
1024 | struct progress *progress; | |
1025 | int progress_done; | |
1026 | uint64_t progress_cnt; | |
6c622f9f DS |
1027 | |
1028 | char *base_graph_name; | |
1029 | int num_commit_graphs_before; | |
1030 | int num_commit_graphs_after; | |
1031 | char **commit_graph_filenames_before; | |
1032 | char **commit_graph_filenames_after; | |
1033 | char **commit_graph_hash_after; | |
1034 | uint32_t new_num_commits_in_base; | |
1035 | struct commit_graph *new_base_graph; | |
1036 | ||
c9905bea | 1037 | unsigned append:1, |
6c622f9f | 1038 | report_progress:1, |
7c5c9b9c | 1039 | split:1, |
3d112755 | 1040 | changed_paths:1, |
e8b63005 | 1041 | order_by_pack:1, |
fde55b09 DS |
1042 | write_generation_data:1, |
1043 | trust_generation_numbers:1; | |
c2bc6e6a | 1044 | |
72a2bfca | 1045 | struct topo_level_slab *topo_levels; |
98bb7961 | 1046 | const struct commit_graph_opts *opts; |
f97b9325 | 1047 | size_t total_bloom_filter_data_size; |
98037f2b | 1048 | const struct bloom_filter_settings *bloom_settings; |
312cff52 TB |
1049 | |
1050 | int count_bloom_filter_computed; | |
1051 | int count_bloom_filter_not_computed; | |
59f0d507 | 1052 | int count_bloom_filter_trunc_empty; |
312cff52 | 1053 | int count_bloom_filter_trunc_large; |
c9905bea DS |
1054 | }; |
1055 | ||
9bab081d | 1056 | static int write_graph_chunk_fanout(struct hashfile *f, |
eb907191 | 1057 | void *data) |
08fd81c9 | 1058 | { |
eb907191 | 1059 | struct write_commit_graph_context *ctx = data; |
08fd81c9 | 1060 | int i, count = 0; |
c9905bea | 1061 | struct commit **list = ctx->commits.list; |
08fd81c9 DS |
1062 | |
1063 | /* | |
1064 | * Write the first-level table (the list is sorted, | |
1065 | * but we use a 256-entry lookup to be able to avoid | |
1066 | * having to do eight extra binary search iterations). | |
1067 | */ | |
1068 | for (i = 0; i < 256; i++) { | |
c9905bea | 1069 | while (count < ctx->commits.nr) { |
08fd81c9 DS |
1070 | if ((*list)->object.oid.hash[0] != i) |
1071 | break; | |
c9905bea | 1072 | display_progress(ctx->progress, ++ctx->progress_cnt); |
08fd81c9 DS |
1073 | count++; |
1074 | list++; | |
1075 | } | |
1076 | ||
1077 | hashwrite_be32(f, count); | |
1078 | } | |
9bab081d SG |
1079 | |
1080 | return 0; | |
08fd81c9 DS |
1081 | } |
1082 | ||
9bab081d | 1083 | static int write_graph_chunk_oids(struct hashfile *f, |
eb907191 | 1084 | void *data) |
08fd81c9 | 1085 | { |
eb907191 | 1086 | struct write_commit_graph_context *ctx = data; |
c9905bea | 1087 | struct commit **list = ctx->commits.list; |
08fd81c9 | 1088 | int count; |
c9905bea DS |
1089 | for (count = 0; count < ctx->commits.nr; count++, list++) { |
1090 | display_progress(ctx->progress, ++ctx->progress_cnt); | |
9bab081d | 1091 | hashwrite(f, (*list)->object.oid.hash, the_hash_algo->rawsz); |
53035c4f | 1092 | } |
9bab081d SG |
1093 | |
1094 | return 0; | |
08fd81c9 DS |
1095 | } |
1096 | ||
8380dcd7 | 1097 | static const struct object_id *commit_to_oid(size_t index, const void *table) |
08fd81c9 | 1098 | { |
8380dcd7 | 1099 | const struct commit * const *commits = table; |
45ee13b9 | 1100 | return &commits[index]->object.oid; |
08fd81c9 DS |
1101 | } |
1102 | ||
9bab081d | 1103 | static int write_graph_chunk_data(struct hashfile *f, |
eb907191 | 1104 | void *data) |
08fd81c9 | 1105 | { |
eb907191 | 1106 | struct write_commit_graph_context *ctx = data; |
c9905bea DS |
1107 | struct commit **list = ctx->commits.list; |
1108 | struct commit **last = ctx->commits.list + ctx->commits.nr; | |
08fd81c9 DS |
1109 | uint32_t num_extra_edges = 0; |
1110 | ||
1111 | while (list < last) { | |
1112 | struct commit_list *parent; | |
806278de | 1113 | struct object_id *tree; |
08fd81c9 DS |
1114 | int edge_value; |
1115 | uint32_t packedDate[2]; | |
c9905bea | 1116 | display_progress(ctx->progress, ++ctx->progress_cnt); |
08fd81c9 | 1117 | |
c4cc0831 | 1118 | if (repo_parse_commit_no_graph(ctx->r, *list)) |
16749b8d TB |
1119 | die(_("unable to parse commit %s"), |
1120 | oid_to_hex(&(*list)->object.oid)); | |
806278de | 1121 | tree = get_commit_tree_oid(*list); |
9bab081d | 1122 | hashwrite(f, tree->hash, the_hash_algo->rawsz); |
08fd81c9 DS |
1123 | |
1124 | parent = (*list)->parents; | |
1125 | ||
1126 | if (!parent) | |
1127 | edge_value = GRAPH_PARENT_NONE; | |
1128 | else { | |
45ee13b9 JK |
1129 | edge_value = oid_pos(&parent->item->object.oid, |
1130 | ctx->commits.list, | |
1131 | ctx->commits.nr, | |
1132 | commit_to_oid); | |
08fd81c9 | 1133 | |
6c622f9f DS |
1134 | if (edge_value >= 0) |
1135 | edge_value += ctx->new_num_commits_in_base; | |
8a6ac287 | 1136 | else if (ctx->new_base_graph) { |
6c622f9f | 1137 | uint32_t pos; |
809ea28f PS |
1138 | if (find_commit_pos_in_graph(parent->item, |
1139 | ctx->new_base_graph, | |
1140 | &pos)) | |
6c622f9f DS |
1141 | edge_value = pos; |
1142 | } | |
1143 | ||
08fd81c9 | 1144 | if (edge_value < 0) |
cce99cd8 DS |
1145 | BUG("missing parent %s for commit %s", |
1146 | oid_to_hex(&parent->item->object.oid), | |
1147 | oid_to_hex(&(*list)->object.oid)); | |
08fd81c9 DS |
1148 | } |
1149 | ||
1150 | hashwrite_be32(f, edge_value); | |
1151 | ||
1152 | if (parent) | |
1153 | parent = parent->next; | |
1154 | ||
1155 | if (!parent) | |
1156 | edge_value = GRAPH_PARENT_NONE; | |
1157 | else if (parent->next) | |
5af7417b | 1158 | edge_value = GRAPH_EXTRA_EDGES_NEEDED | num_extra_edges; |
08fd81c9 | 1159 | else { |
45ee13b9 JK |
1160 | edge_value = oid_pos(&parent->item->object.oid, |
1161 | ctx->commits.list, | |
1162 | ctx->commits.nr, | |
1163 | commit_to_oid); | |
6c622f9f DS |
1164 | |
1165 | if (edge_value >= 0) | |
1166 | edge_value += ctx->new_num_commits_in_base; | |
8a6ac287 | 1167 | else if (ctx->new_base_graph) { |
6c622f9f | 1168 | uint32_t pos; |
809ea28f PS |
1169 | if (find_commit_pos_in_graph(parent->item, |
1170 | ctx->new_base_graph, | |
1171 | &pos)) | |
6c622f9f DS |
1172 | edge_value = pos; |
1173 | } | |
1174 | ||
08fd81c9 | 1175 | if (edge_value < 0) |
cce99cd8 DS |
1176 | BUG("missing parent %s for commit %s", |
1177 | oid_to_hex(&parent->item->object.oid), | |
1178 | oid_to_hex(&(*list)->object.oid)); | |
08fd81c9 DS |
1179 | } |
1180 | ||
1181 | hashwrite_be32(f, edge_value); | |
1182 | ||
5af7417b | 1183 | if (edge_value & GRAPH_EXTRA_EDGES_NEEDED) { |
08fd81c9 DS |
1184 | do { |
1185 | num_extra_edges++; | |
1186 | parent = parent->next; | |
1187 | } while (parent); | |
1188 | } | |
1189 | ||
1190 | if (sizeof((*list)->date) > 4) | |
1191 | packedDate[0] = htonl(((*list)->date >> 32) & 0x3); | |
1192 | else | |
1193 | packedDate[0] = 0; | |
1194 | ||
72a2bfca | 1195 | packedDate[0] |= htonl(*topo_level_slab_at(ctx->topo_levels, *list) << 2); |
3258c663 | 1196 | |
08fd81c9 DS |
1197 | packedDate[1] = htonl((*list)->date); |
1198 | hashwrite(f, packedDate, 8); | |
1199 | ||
1200 | list++; | |
1201 | } | |
9bab081d SG |
1202 | |
1203 | return 0; | |
08fd81c9 DS |
1204 | } |
1205 | ||
e8b63005 | 1206 | static int write_graph_chunk_generation_data(struct hashfile *f, |
eb907191 | 1207 | void *data) |
e8b63005 | 1208 | { |
eb907191 | 1209 | struct write_commit_graph_context *ctx = data; |
e8b63005 AK |
1210 | int i, num_generation_data_overflows = 0; |
1211 | ||
1212 | for (i = 0; i < ctx->commits.nr; i++) { | |
1213 | struct commit *c = ctx->commits.list[i]; | |
90cb1c47 DS |
1214 | timestamp_t offset; |
1215 | repo_parse_commit(ctx->r, c); | |
1216 | offset = commit_graph_data_at(c)->generation - c->date; | |
e8b63005 AK |
1217 | display_progress(ctx->progress, ++ctx->progress_cnt); |
1218 | ||
1219 | if (offset > GENERATION_NUMBER_V2_OFFSET_MAX) { | |
1220 | offset = CORRECTED_COMMIT_DATE_OFFSET_OVERFLOW | num_generation_data_overflows; | |
1221 | num_generation_data_overflows++; | |
1222 | } | |
1223 | ||
1224 | hashwrite_be32(f, offset); | |
1225 | } | |
1226 | ||
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | static int write_graph_chunk_generation_data_overflow(struct hashfile *f, | |
eb907191 | 1231 | void *data) |
e8b63005 | 1232 | { |
eb907191 | 1233 | struct write_commit_graph_context *ctx = data; |
e8b63005 AK |
1234 | int i; |
1235 | for (i = 0; i < ctx->commits.nr; i++) { | |
1236 | struct commit *c = ctx->commits.list[i]; | |
1237 | timestamp_t offset = commit_graph_data_at(c)->generation - c->date; | |
1238 | display_progress(ctx->progress, ++ctx->progress_cnt); | |
1239 | ||
1240 | if (offset > GENERATION_NUMBER_V2_OFFSET_MAX) { | |
1241 | hashwrite_be32(f, offset >> 32); | |
1242 | hashwrite_be32(f, (uint32_t) offset); | |
1243 | } | |
1244 | } | |
1245 | ||
1246 | return 0; | |
1247 | } | |
1248 | ||
9bab081d | 1249 | static int write_graph_chunk_extra_edges(struct hashfile *f, |
eb907191 | 1250 | void *data) |
08fd81c9 | 1251 | { |
eb907191 | 1252 | struct write_commit_graph_context *ctx = data; |
c9905bea DS |
1253 | struct commit **list = ctx->commits.list; |
1254 | struct commit **last = ctx->commits.list + ctx->commits.nr; | |
08fd81c9 DS |
1255 | struct commit_list *parent; |
1256 | ||
1257 | while (list < last) { | |
1258 | int num_parents = 0; | |
53035c4f | 1259 | |
c9905bea | 1260 | display_progress(ctx->progress, ++ctx->progress_cnt); |
53035c4f | 1261 | |
08fd81c9 DS |
1262 | for (parent = (*list)->parents; num_parents < 3 && parent; |
1263 | parent = parent->next) | |
1264 | num_parents++; | |
1265 | ||
1266 | if (num_parents <= 2) { | |
1267 | list++; | |
1268 | continue; | |
1269 | } | |
1270 | ||
1271 | /* Since num_parents > 2, this initializer is safe. */ | |
1272 | for (parent = (*list)->parents->next; parent; parent = parent->next) { | |
45ee13b9 JK |
1273 | int edge_value = oid_pos(&parent->item->object.oid, |
1274 | ctx->commits.list, | |
1275 | ctx->commits.nr, | |
1276 | commit_to_oid); | |
08fd81c9 | 1277 | |
6c622f9f DS |
1278 | if (edge_value >= 0) |
1279 | edge_value += ctx->new_num_commits_in_base; | |
8a6ac287 | 1280 | else if (ctx->new_base_graph) { |
6c622f9f | 1281 | uint32_t pos; |
809ea28f PS |
1282 | if (find_commit_pos_in_graph(parent->item, |
1283 | ctx->new_base_graph, | |
1284 | &pos)) | |
6c622f9f DS |
1285 | edge_value = pos; |
1286 | } | |
1287 | ||
08fd81c9 | 1288 | if (edge_value < 0) |
cce99cd8 DS |
1289 | BUG("missing parent %s for commit %s", |
1290 | oid_to_hex(&parent->item->object.oid), | |
1291 | oid_to_hex(&(*list)->object.oid)); | |
08fd81c9 DS |
1292 | else if (!parent->next) |
1293 | edge_value |= GRAPH_LAST_EDGE; | |
1294 | ||
1295 | hashwrite_be32(f, edge_value); | |
1296 | } | |
1297 | ||
1298 | list++; | |
1299 | } | |
9bab081d SG |
1300 | |
1301 | return 0; | |
08fd81c9 DS |
1302 | } |
1303 | ||
9bab081d | 1304 | static int write_graph_chunk_bloom_indexes(struct hashfile *f, |
eb907191 | 1305 | void *data) |
76ffbca7 | 1306 | { |
eb907191 | 1307 | struct write_commit_graph_context *ctx = data; |
76ffbca7 GS |
1308 | struct commit **list = ctx->commits.list; |
1309 | struct commit **last = ctx->commits.list + ctx->commits.nr; | |
1310 | uint32_t cur_pos = 0; | |
76ffbca7 GS |
1311 | |
1312 | while (list < last) { | |
312cff52 | 1313 | struct bloom_filter *filter = get_bloom_filter(ctx->r, *list); |
94919742 DS |
1314 | size_t len = filter ? filter->len : 0; |
1315 | cur_pos += len; | |
150cd3b6 | 1316 | display_progress(ctx->progress, ++ctx->progress_cnt); |
76ffbca7 GS |
1317 | hashwrite_be32(f, cur_pos); |
1318 | list++; | |
1319 | } | |
1320 | ||
9bab081d | 1321 | return 0; |
76ffbca7 GS |
1322 | } |
1323 | ||
0087a87b DS |
1324 | static void trace2_bloom_filter_settings(struct write_commit_graph_context *ctx) |
1325 | { | |
1326 | struct json_writer jw = JSON_WRITER_INIT; | |
1327 | ||
1328 | jw_object_begin(&jw, 0); | |
1329 | jw_object_intmax(&jw, "hash_version", ctx->bloom_settings->hash_version); | |
1330 | jw_object_intmax(&jw, "num_hashes", ctx->bloom_settings->num_hashes); | |
1331 | jw_object_intmax(&jw, "bits_per_entry", ctx->bloom_settings->bits_per_entry); | |
97ffa4fa | 1332 | jw_object_intmax(&jw, "max_changed_paths", ctx->bloom_settings->max_changed_paths); |
0087a87b DS |
1333 | jw_end(&jw); |
1334 | ||
1335 | trace2_data_json("bloom", ctx->r, "settings", &jw); | |
1336 | ||
1337 | jw_release(&jw); | |
76ffbca7 GS |
1338 | } |
1339 | ||
9bab081d | 1340 | static int write_graph_chunk_bloom_data(struct hashfile *f, |
eb907191 | 1341 | void *data) |
76ffbca7 | 1342 | { |
eb907191 | 1343 | struct write_commit_graph_context *ctx = data; |
76ffbca7 GS |
1344 | struct commit **list = ctx->commits.list; |
1345 | struct commit **last = ctx->commits.list + ctx->commits.nr; | |
76ffbca7 | 1346 | |
0087a87b DS |
1347 | trace2_bloom_filter_settings(ctx); |
1348 | ||
98037f2b DS |
1349 | hashwrite_be32(f, ctx->bloom_settings->hash_version); |
1350 | hashwrite_be32(f, ctx->bloom_settings->num_hashes); | |
1351 | hashwrite_be32(f, ctx->bloom_settings->bits_per_entry); | |
76ffbca7 GS |
1352 | |
1353 | while (list < last) { | |
312cff52 | 1354 | struct bloom_filter *filter = get_bloom_filter(ctx->r, *list); |
94919742 | 1355 | size_t len = filter ? filter->len : 0; |
94919742 | 1356 | |
150cd3b6 | 1357 | display_progress(ctx->progress, ++ctx->progress_cnt); |
94919742 DS |
1358 | if (len) |
1359 | hashwrite(f, filter->data, len * sizeof(unsigned char)); | |
76ffbca7 GS |
1360 | list++; |
1361 | } | |
1362 | ||
9bab081d | 1363 | return 0; |
76ffbca7 GS |
1364 | } |
1365 | ||
08fd81c9 DS |
1366 | static int add_packed_commits(const struct object_id *oid, |
1367 | struct packed_git *pack, | |
1368 | uint32_t pos, | |
1369 | void *data) | |
1370 | { | |
c9905bea | 1371 | struct write_commit_graph_context *ctx = (struct write_commit_graph_context*)data; |
08fd81c9 DS |
1372 | enum object_type type; |
1373 | off_t offset = nth_packed_object_offset(pack, pos); | |
1374 | struct object_info oi = OBJECT_INFO_INIT; | |
1375 | ||
c9905bea DS |
1376 | if (ctx->progress) |
1377 | display_progress(ctx->progress, ++ctx->progress_done); | |
7b0f2292 | 1378 | |
08fd81c9 | 1379 | oi.typep = &type; |
c9905bea | 1380 | if (packed_object_info(ctx->r, pack, offset, &oi) < 0) |
4f5b532d | 1381 | die(_("unable to get type of object %s"), oid_to_hex(oid)); |
08fd81c9 DS |
1382 | |
1383 | if (type != OBJ_COMMIT) | |
1384 | return 0; | |
1385 | ||
a5f1c448 | 1386 | oid_array_append(&ctx->oids, oid); |
d21ee7d1 JK |
1387 | set_commit_pos(ctx->r, oid); |
1388 | ||
08fd81c9 DS |
1389 | return 0; |
1390 | } | |
1391 | ||
c9905bea | 1392 | static void add_missing_parents(struct write_commit_graph_context *ctx, struct commit *commit) |
4f2542b4 DS |
1393 | { |
1394 | struct commit_list *parent; | |
1395 | for (parent = commit->parents; parent; parent = parent->next) { | |
cb99a34e | 1396 | if (!(parent->item->object.flags & REACHABLE)) { |
a5f1c448 | 1397 | oid_array_append(&ctx->oids, &parent->item->object.oid); |
cb99a34e | 1398 | parent->item->object.flags |= REACHABLE; |
4f2542b4 DS |
1399 | } |
1400 | } | |
1401 | } | |
1402 | ||
c9905bea | 1403 | static void close_reachable(struct write_commit_graph_context *ctx) |
4f2542b4 | 1404 | { |
49bbc57a | 1405 | int i; |
4f2542b4 | 1406 | struct commit *commit; |
98bb7961 TB |
1407 | enum commit_graph_split_flags flags = ctx->opts ? |
1408 | ctx->opts->split_flags : COMMIT_GRAPH_SPLIT_UNSPECIFIED; | |
4f2542b4 | 1409 | |
c9905bea DS |
1410 | if (ctx->report_progress) |
1411 | ctx->progress = start_delayed_progress( | |
1412 | _("Loading known commits in commit graph"), | |
1413 | ctx->oids.nr); | |
1414 | for (i = 0; i < ctx->oids.nr; i++) { | |
1415 | display_progress(ctx->progress, i + 1); | |
a5f1c448 | 1416 | commit = lookup_commit(ctx->r, &ctx->oids.oid[i]); |
4f2542b4 | 1417 | if (commit) |
cb99a34e | 1418 | commit->object.flags |= REACHABLE; |
4f2542b4 | 1419 | } |
c9905bea | 1420 | stop_progress(&ctx->progress); |
4f2542b4 DS |
1421 | |
1422 | /* | |
c9905bea | 1423 | * As this loop runs, ctx->oids.nr may grow, but not more |
4f2542b4 DS |
1424 | * than the number of missing commits in the reachable |
1425 | * closure. | |
1426 | */ | |
c9905bea DS |
1427 | if (ctx->report_progress) |
1428 | ctx->progress = start_delayed_progress( | |
1429 | _("Expanding reachable commits in commit graph"), | |
67fa6aac | 1430 | 0); |
c9905bea DS |
1431 | for (i = 0; i < ctx->oids.nr; i++) { |
1432 | display_progress(ctx->progress, i + 1); | |
a5f1c448 | 1433 | commit = lookup_commit(ctx->r, &ctx->oids.oid[i]); |
4f2542b4 | 1434 | |
6c622f9f DS |
1435 | if (!commit) |
1436 | continue; | |
1437 | if (ctx->split) { | |
c4cc0831 | 1438 | if ((!repo_parse_commit(ctx->r, commit) && |
c49c82aa | 1439 | commit_graph_position(commit) == COMMIT_NOT_FROM_GRAPH) || |
8a6ac287 | 1440 | flags == COMMIT_GRAPH_SPLIT_REPLACE) |
6c622f9f | 1441 | add_missing_parents(ctx, commit); |
c4cc0831 | 1442 | } else if (!repo_parse_commit_no_graph(ctx->r, commit)) |
c9905bea | 1443 | add_missing_parents(ctx, commit); |
4f2542b4 | 1444 | } |
c9905bea | 1445 | stop_progress(&ctx->progress); |
4f2542b4 | 1446 | |
c9905bea DS |
1447 | if (ctx->report_progress) |
1448 | ctx->progress = start_delayed_progress( | |
1449 | _("Clearing commit marks in commit graph"), | |
1450 | ctx->oids.nr); | |
1451 | for (i = 0; i < ctx->oids.nr; i++) { | |
1452 | display_progress(ctx->progress, i + 1); | |
a5f1c448 | 1453 | commit = lookup_commit(ctx->r, &ctx->oids.oid[i]); |
4f2542b4 DS |
1454 | |
1455 | if (commit) | |
cb99a34e | 1456 | commit->object.flags &= ~REACHABLE; |
4f2542b4 | 1457 | } |
c9905bea | 1458 | stop_progress(&ctx->progress); |
4f2542b4 DS |
1459 | } |
1460 | ||
368d19b0 DS |
1461 | struct compute_generation_info { |
1462 | struct repository *r; | |
1463 | struct packed_commit_list *commits; | |
1464 | struct progress *progress; | |
1465 | int progress_cnt; | |
1466 | ||
1467 | timestamp_t (*get_generation)(struct commit *c, void *data); | |
1468 | void (*set_generation)(struct commit *c, timestamp_t gen, void *data); | |
1469 | void *data; | |
1470 | }; | |
1471 | ||
1472 | static timestamp_t compute_generation_from_max(struct commit *c, | |
1473 | timestamp_t max_gen, | |
1474 | int generation_version) | |
1475 | { | |
1476 | switch (generation_version) { | |
1477 | case 1: /* topological levels */ | |
1478 | if (max_gen > GENERATION_NUMBER_V1_MAX - 1) | |
1479 | max_gen = GENERATION_NUMBER_V1_MAX - 1; | |
1480 | return max_gen + 1; | |
1481 | ||
1482 | case 2: /* corrected commit date */ | |
1483 | if (c->date && c->date > max_gen) | |
1484 | max_gen = c->date - 1; | |
1485 | return max_gen + 1; | |
1486 | ||
1487 | default: | |
1488 | BUG("attempting unimplemented version"); | |
1489 | } | |
1490 | } | |
1491 | ||
1492 | static void compute_reachable_generation_numbers( | |
1493 | struct compute_generation_info *info, | |
1494 | int generation_version) | |
3258c663 DS |
1495 | { |
1496 | int i; | |
1497 | struct commit_list *list = NULL; | |
1498 | ||
368d19b0 DS |
1499 | for (i = 0; i < info->commits->nr; i++) { |
1500 | struct commit *c = info->commits->list[i]; | |
1501 | timestamp_t gen; | |
1502 | repo_parse_commit(info->r, c); | |
1503 | gen = info->get_generation(c, info->data); | |
1504 | display_progress(info->progress, info->progress_cnt + 1); | |
4844812b | 1505 | |
368d19b0 | 1506 | if (gen != GENERATION_NUMBER_ZERO && gen != GENERATION_NUMBER_INFINITY) |
3258c663 DS |
1507 | continue; |
1508 | ||
90cb1c47 | 1509 | commit_list_insert(c, &list); |
3258c663 DS |
1510 | while (list) { |
1511 | struct commit *current = list->item; | |
1512 | struct commit_list *parent; | |
1513 | int all_parents_computed = 1; | |
368d19b0 | 1514 | uint32_t max_gen = 0; |
3258c663 DS |
1515 | |
1516 | for (parent = current->parents; parent; parent = parent->next) { | |
368d19b0 DS |
1517 | repo_parse_commit(info->r, parent->item); |
1518 | gen = info->get_generation(parent->item, info->data); | |
4844812b | 1519 | |
368d19b0 | 1520 | if (gen == GENERATION_NUMBER_ZERO) { |
3258c663 DS |
1521 | all_parents_computed = 0; |
1522 | commit_list_insert(parent->item, &list); | |
1523 | break; | |
3258c663 | 1524 | } |
c1a09119 | 1525 | |
368d19b0 DS |
1526 | if (gen > max_gen) |
1527 | max_gen = gen; | |
3258c663 DS |
1528 | } |
1529 | ||
1530 | if (all_parents_computed) { | |
3258c663 | 1531 | pop_commit(&list); |
368d19b0 DS |
1532 | gen = compute_generation_from_max( |
1533 | current, max_gen, | |
1534 | generation_version); | |
1535 | info->set_generation(current, gen, info->data); | |
9c2c0a82 DS |
1536 | } |
1537 | } | |
1538 | } | |
368d19b0 DS |
1539 | } |
1540 | ||
1541 | static timestamp_t get_topo_level(struct commit *c, void *data) | |
1542 | { | |
1543 | struct write_commit_graph_context *ctx = data; | |
1544 | return *topo_level_slab_at(ctx->topo_levels, c); | |
1545 | } | |
1546 | ||
1547 | static void set_topo_level(struct commit *c, timestamp_t t, void *data) | |
1548 | { | |
1549 | struct write_commit_graph_context *ctx = data; | |
1550 | *topo_level_slab_at(ctx->topo_levels, c) = (uint32_t)t; | |
1551 | } | |
1552 | ||
1553 | static void compute_topological_levels(struct write_commit_graph_context *ctx) | |
1554 | { | |
1555 | struct compute_generation_info info = { | |
1556 | .r = ctx->r, | |
1557 | .commits = &ctx->commits, | |
1558 | .get_generation = get_topo_level, | |
1559 | .set_generation = set_topo_level, | |
1560 | .data = ctx, | |
1561 | }; | |
1562 | ||
1563 | if (ctx->report_progress) | |
1564 | info.progress = ctx->progress | |
1565 | = start_delayed_progress( | |
1566 | _("Computing commit graph topological levels"), | |
1567 | ctx->commits.nr); | |
1568 | ||
1569 | compute_reachable_generation_numbers(&info, 1); | |
1570 | ||
9c2c0a82 DS |
1571 | stop_progress(&ctx->progress); |
1572 | } | |
1573 | ||
e1cba404 JK |
1574 | static timestamp_t get_generation_from_graph_data(struct commit *c, |
1575 | void *data UNUSED) | |
80c928d9 DS |
1576 | { |
1577 | return commit_graph_data_at(c)->generation; | |
1578 | } | |
1579 | ||
e1cba404 JK |
1580 | static void set_generation_v2(struct commit *c, timestamp_t t, |
1581 | void *data UNUSED) | |
80c928d9 DS |
1582 | { |
1583 | struct commit_graph_data *g = commit_graph_data_at(c); | |
d3af1c19 | 1584 | g->generation = t; |
80c928d9 DS |
1585 | } |
1586 | ||
9c2c0a82 DS |
1587 | static void compute_generation_numbers(struct write_commit_graph_context *ctx) |
1588 | { | |
1589 | int i; | |
80c928d9 DS |
1590 | struct compute_generation_info info = { |
1591 | .r = ctx->r, | |
1592 | .commits = &ctx->commits, | |
1593 | .get_generation = get_generation_from_graph_data, | |
1594 | .set_generation = set_generation_v2, | |
80c928d9 | 1595 | }; |
9c2c0a82 DS |
1596 | |
1597 | if (ctx->report_progress) | |
80c928d9 DS |
1598 | info.progress = ctx->progress |
1599 | = start_delayed_progress( | |
9c2c0a82 DS |
1600 | _("Computing commit graph generation numbers"), |
1601 | ctx->commits.nr); | |
fde55b09 DS |
1602 | |
1603 | if (!ctx->trust_generation_numbers) { | |
1604 | for (i = 0; i < ctx->commits.nr; i++) { | |
1605 | struct commit *c = ctx->commits.list[i]; | |
1606 | repo_parse_commit(ctx->r, c); | |
1607 | commit_graph_data_at(c)->generation = GENERATION_NUMBER_ZERO; | |
1608 | } | |
1609 | } | |
1610 | ||
80c928d9 | 1611 | compute_reachable_generation_numbers(&info, 2); |
75979d94 DS |
1612 | |
1613 | for (i = 0; i < ctx->commits.nr; i++) { | |
1614 | struct commit *c = ctx->commits.list[i]; | |
1615 | timestamp_t offset = commit_graph_data_at(c)->generation - c->date; | |
1616 | if (offset > GENERATION_NUMBER_V2_OFFSET_MAX) | |
1617 | ctx->num_generation_data_overflows++; | |
1618 | } | |
c9905bea | 1619 | stop_progress(&ctx->progress); |
3258c663 DS |
1620 | } |
1621 | ||
c08645b3 | 1622 | static void set_generation_in_graph_data(struct commit *c, timestamp_t t, |
e1cba404 | 1623 | void *data UNUSED) |
c08645b3 TB |
1624 | { |
1625 | commit_graph_data_at(c)->generation = t; | |
1626 | } | |
1627 | ||
1628 | /* | |
1629 | * After this method, all commits reachable from those in the given | |
1630 | * list will have non-zero, non-infinite generation numbers. | |
1631 | */ | |
1632 | void ensure_generations_valid(struct repository *r, | |
1633 | struct commit **commits, size_t nr) | |
1634 | { | |
1635 | int generation_version = get_configured_generation_version(r); | |
1636 | struct packed_commit_list list = { | |
1637 | .list = commits, | |
1638 | .alloc = nr, | |
1639 | .nr = nr, | |
1640 | }; | |
1641 | struct compute_generation_info info = { | |
1642 | .r = r, | |
1643 | .commits = &list, | |
1644 | .get_generation = get_generation_from_graph_data, | |
1645 | .set_generation = set_generation_in_graph_data, | |
1646 | }; | |
1647 | ||
1648 | compute_reachable_generation_numbers(&info, generation_version); | |
1649 | } | |
1650 | ||
312cff52 TB |
1651 | static void trace2_bloom_filter_write_statistics(struct write_commit_graph_context *ctx) |
1652 | { | |
1653 | trace2_data_intmax("commit-graph", ctx->r, "filter-computed", | |
1654 | ctx->count_bloom_filter_computed); | |
1655 | trace2_data_intmax("commit-graph", ctx->r, "filter-not-computed", | |
1656 | ctx->count_bloom_filter_not_computed); | |
59f0d507 TB |
1657 | trace2_data_intmax("commit-graph", ctx->r, "filter-trunc-empty", |
1658 | ctx->count_bloom_filter_trunc_empty); | |
312cff52 TB |
1659 | trace2_data_intmax("commit-graph", ctx->r, "filter-trunc-large", |
1660 | ctx->count_bloom_filter_trunc_large); | |
1661 | } | |
1662 | ||
f97b9325 GS |
1663 | static void compute_bloom_filters(struct write_commit_graph_context *ctx) |
1664 | { | |
1665 | int i; | |
1666 | struct progress *progress = NULL; | |
d21ee7d1 | 1667 | struct commit **sorted_commits; |
809e0327 | 1668 | int max_new_filters; |
f97b9325 GS |
1669 | |
1670 | init_bloom_filters(); | |
1671 | ||
1672 | if (ctx->report_progress) | |
1673 | progress = start_delayed_progress( | |
1674 | _("Computing commit changed paths Bloom filters"), | |
1675 | ctx->commits.nr); | |
1676 | ||
6e578410 | 1677 | DUP_ARRAY(sorted_commits, ctx->commits.list, ctx->commits.nr); |
3d112755 GS |
1678 | |
1679 | if (ctx->order_by_pack) | |
1680 | QSORT(sorted_commits, ctx->commits.nr, commit_pos_cmp); | |
1681 | else | |
1682 | QSORT(sorted_commits, ctx->commits.nr, commit_gen_cmp); | |
d21ee7d1 | 1683 | |
809e0327 TB |
1684 | max_new_filters = ctx->opts && ctx->opts->max_new_filters >= 0 ? |
1685 | ctx->opts->max_new_filters : ctx->commits.nr; | |
1686 | ||
f97b9325 | 1687 | for (i = 0; i < ctx->commits.nr; i++) { |
312cff52 | 1688 | enum bloom_filter_computed computed = 0; |
d21ee7d1 | 1689 | struct commit *c = sorted_commits[i]; |
312cff52 TB |
1690 | struct bloom_filter *filter = get_or_compute_bloom_filter( |
1691 | ctx->r, | |
1692 | c, | |
809e0327 | 1693 | ctx->count_bloom_filter_computed < max_new_filters, |
9a7a9ed1 | 1694 | ctx->bloom_settings, |
312cff52 TB |
1695 | &computed); |
1696 | if (computed & BLOOM_COMPUTED) { | |
1697 | ctx->count_bloom_filter_computed++; | |
59f0d507 TB |
1698 | if (computed & BLOOM_TRUNC_EMPTY) |
1699 | ctx->count_bloom_filter_trunc_empty++; | |
312cff52 TB |
1700 | if (computed & BLOOM_TRUNC_LARGE) |
1701 | ctx->count_bloom_filter_trunc_large++; | |
1702 | } else if (computed & BLOOM_NOT_COMPUTED) | |
1703 | ctx->count_bloom_filter_not_computed++; | |
809e0327 TB |
1704 | ctx->total_bloom_filter_data_size += filter |
1705 | ? sizeof(unsigned char) * filter->len : 0; | |
f97b9325 GS |
1706 | display_progress(progress, i + 1); |
1707 | } | |
1708 | ||
312cff52 TB |
1709 | if (trace2_is_enabled()) |
1710 | trace2_bloom_filter_write_statistics(ctx); | |
1711 | ||
d21ee7d1 | 1712 | free(sorted_commits); |
f97b9325 GS |
1713 | stop_progress(&progress); |
1714 | } | |
1715 | ||
1fe10844 TB |
1716 | struct refs_cb_data { |
1717 | struct oidset *commits; | |
d335ce8f | 1718 | struct progress *progress; |
1fe10844 TB |
1719 | }; |
1720 | ||
5cf88fd8 | 1721 | static int add_ref_to_set(const char *refname UNUSED, |
6830c360 | 1722 | const struct object_id *oid, |
5cf88fd8 | 1723 | int flags UNUSED, void *cb_data) |
59fb8770 | 1724 | { |
630cd519 | 1725 | struct object_id peeled; |
1fe10844 | 1726 | struct refs_cb_data *data = (struct refs_cb_data *)cb_data; |
59fb8770 | 1727 | |
36a31792 | 1728 | if (!peel_iterated_oid(oid, &peeled)) |
630cd519 TB |
1729 | oid = &peeled; |
1730 | if (oid_object_info(the_repository, oid, NULL) == OBJ_COMMIT) | |
1731 | oidset_insert(data->commits, oid); | |
d335ce8f TB |
1732 | |
1733 | display_progress(data->progress, oidset_size(data->commits)); | |
59fb8770 | 1734 | |
59fb8770 DS |
1735 | return 0; |
1736 | } | |
1737 | ||
0bd52e27 | 1738 | int write_commit_graph_reachable(struct object_directory *odb, |
39d88318 | 1739 | enum commit_graph_write_flags flags, |
98bb7961 | 1740 | const struct commit_graph_opts *opts) |
59fb8770 | 1741 | { |
6830c360 | 1742 | struct oidset commits = OIDSET_INIT; |
1fe10844 | 1743 | struct refs_cb_data data; |
e103f727 | 1744 | int result; |
59fb8770 | 1745 | |
1fe10844 TB |
1746 | memset(&data, 0, sizeof(data)); |
1747 | data.commits = &commits; | |
d335ce8f TB |
1748 | if (flags & COMMIT_GRAPH_WRITE_PROGRESS) |
1749 | data.progress = start_delayed_progress( | |
1750 | _("Collecting referenced commits"), 0); | |
1fe10844 TB |
1751 | |
1752 | for_each_ref(add_ref_to_set, &data); | |
6f9d5f2f SG |
1753 | |
1754 | stop_progress(&data.progress); | |
1755 | ||
6830c360 | 1756 | result = write_commit_graph(odb, NULL, &commits, |
98bb7961 | 1757 | flags, opts); |
f4dbdfc4 | 1758 | |
6830c360 | 1759 | oidset_clear(&commits); |
e103f727 | 1760 | return result; |
59fb8770 DS |
1761 | } |
1762 | ||
ef5b83f2 | 1763 | static int fill_oids_from_packs(struct write_commit_graph_context *ctx, |
4a047908 | 1764 | const struct string_list *pack_indexes) |
08fd81c9 | 1765 | { |
ef5b83f2 | 1766 | uint32_t i; |
28944739 | 1767 | struct strbuf progress_title = STRBUF_INIT; |
ef5b83f2 DS |
1768 | struct strbuf packname = STRBUF_INIT; |
1769 | int dirlen; | |
51a94d8f | 1770 | int ret = 0; |
08fd81c9 | 1771 | |
0bd52e27 | 1772 | strbuf_addf(&packname, "%s/pack/", ctx->odb->path); |
ef5b83f2 DS |
1773 | dirlen = packname.len; |
1774 | if (ctx->report_progress) { | |
1775 | strbuf_addf(&progress_title, | |
99d60545 ÆAB |
1776 | Q_("Finding commits for commit graph in %"PRIuMAX" pack", |
1777 | "Finding commits for commit graph in %"PRIuMAX" packs", | |
ef5b83f2 | 1778 | pack_indexes->nr), |
99d60545 | 1779 | (uintmax_t)pack_indexes->nr); |
ef5b83f2 DS |
1780 | ctx->progress = start_delayed_progress(progress_title.buf, 0); |
1781 | ctx->progress_done = 0; | |
7547b95b | 1782 | } |
ef5b83f2 DS |
1783 | for (i = 0; i < pack_indexes->nr; i++) { |
1784 | struct packed_git *p; | |
1785 | strbuf_setlen(&packname, dirlen); | |
1786 | strbuf_addstr(&packname, pack_indexes->items[i].string); | |
1787 | p = add_packed_git(packname.buf, packname.len, 1); | |
1788 | if (!p) { | |
51a94d8f ÆAB |
1789 | ret = error(_("error adding pack %s"), packname.buf); |
1790 | goto cleanup; | |
7547b95b | 1791 | } |
ef5b83f2 | 1792 | if (open_pack_index(p)) { |
51a94d8f ÆAB |
1793 | ret = error(_("error opening index for %s"), packname.buf); |
1794 | goto cleanup; | |
ef5b83f2 DS |
1795 | } |
1796 | for_each_object_in_pack(p, add_packed_commits, ctx, | |
1797 | FOR_EACH_OBJECT_PACK_ORDER); | |
1798 | close_pack(p); | |
1799 | free(p); | |
7547b95b DS |
1800 | } |
1801 | ||
51a94d8f | 1802 | cleanup: |
ef5b83f2 | 1803 | stop_progress(&ctx->progress); |
0aa6bce7 | 1804 | strbuf_release(&progress_title); |
ef5b83f2 DS |
1805 | strbuf_release(&packname); |
1806 | ||
51a94d8f | 1807 | return ret; |
ef5b83f2 DS |
1808 | } |
1809 | ||
6830c360 TB |
1810 | static int fill_oids_from_commits(struct write_commit_graph_context *ctx, |
1811 | struct oidset *commits) | |
4c9efe85 | 1812 | { |
6830c360 TB |
1813 | struct oidset_iter iter; |
1814 | struct object_id *oid; | |
1815 | ||
1816 | if (!oidset_size(commits)) | |
1817 | return 0; | |
4c9efe85 | 1818 | |
6830c360 TB |
1819 | oidset_iter_init(commits, &iter); |
1820 | while ((oid = oidset_iter_next(&iter))) { | |
a5f1c448 | 1821 | oid_array_append(&ctx->oids, oid); |
3d5df01b | 1822 | } |
6830c360 | 1823 | |
7c5c9b9c | 1824 | return 0; |
4c9efe85 | 1825 | } |
3d5df01b | 1826 | |
b2c83060 DS |
1827 | static void fill_oids_from_all_packs(struct write_commit_graph_context *ctx) |
1828 | { | |
1829 | if (ctx->report_progress) | |
1830 | ctx->progress = start_delayed_progress( | |
1831 | _("Finding commits for commit graph among packed objects"), | |
1832 | ctx->approx_nr_objects); | |
1833 | for_each_packed_object(add_packed_commits, ctx, | |
1834 | FOR_EACH_OBJECT_PACK_ORDER); | |
1835 | if (ctx->progress_done < ctx->approx_nr_objects) | |
1836 | display_progress(ctx->progress, ctx->approx_nr_objects); | |
1837 | stop_progress(&ctx->progress); | |
1838 | } | |
049d51a2 | 1839 | |
f998d542 DS |
1840 | static void copy_oids_to_commits(struct write_commit_graph_context *ctx) |
1841 | { | |
1842 | uint32_t i; | |
98bb7961 TB |
1843 | enum commit_graph_split_flags flags = ctx->opts ? |
1844 | ctx->opts->split_flags : COMMIT_GRAPH_SPLIT_UNSPECIFIED; | |
08fd81c9 | 1845 | |
f998d542 DS |
1846 | ctx->num_extra_edges = 0; |
1847 | if (ctx->report_progress) | |
1848 | ctx->progress = start_delayed_progress( | |
890226cc | 1849 | _("Finding extra edges in commit graph"), |
f998d542 | 1850 | ctx->oids.nr); |
a5f1c448 JK |
1851 | oid_array_sort(&ctx->oids); |
1852 | for (i = 0; i < ctx->oids.nr; i = oid_array_next_unique(&ctx->oids, i)) { | |
689a146c RS |
1853 | unsigned int num_parents; |
1854 | ||
f998d542 | 1855 | display_progress(ctx->progress, i + 1); |
08fd81c9 | 1856 | |
6c622f9f | 1857 | ALLOC_GROW(ctx->commits.list, ctx->commits.nr + 1, ctx->commits.alloc); |
a5f1c448 | 1858 | ctx->commits.list[ctx->commits.nr] = lookup_commit(ctx->r, &ctx->oids.oid[i]); |
6c622f9f | 1859 | |
8a6ac287 | 1860 | if (ctx->split && flags != COMMIT_GRAPH_SPLIT_REPLACE && |
c49c82aa | 1861 | commit_graph_position(ctx->commits.list[ctx->commits.nr]) != COMMIT_NOT_FROM_GRAPH) |
6c622f9f DS |
1862 | continue; |
1863 | ||
8a6ac287 | 1864 | if (ctx->split && flags == COMMIT_GRAPH_SPLIT_REPLACE) |
c4cc0831 | 1865 | repo_parse_commit(ctx->r, ctx->commits.list[ctx->commits.nr]); |
8a6ac287 | 1866 | else |
c4cc0831 | 1867 | repo_parse_commit_no_graph(ctx->r, ctx->commits.list[ctx->commits.nr]); |
08fd81c9 | 1868 | |
689a146c | 1869 | num_parents = commit_list_count(ctx->commits.list[ctx->commits.nr]->parents); |
08fd81c9 | 1870 | if (num_parents > 2) |
f998d542 | 1871 | ctx->num_extra_edges += num_parents - 1; |
08fd81c9 | 1872 | |
f998d542 | 1873 | ctx->commits.nr++; |
08fd81c9 | 1874 | } |
f998d542 DS |
1875 | stop_progress(&ctx->progress); |
1876 | } | |
08fd81c9 | 1877 | |
6c622f9f DS |
1878 | static int write_graph_chunk_base_1(struct hashfile *f, |
1879 | struct commit_graph *g) | |
1880 | { | |
1881 | int num = 0; | |
1882 | ||
1883 | if (!g) | |
1884 | return 0; | |
1885 | ||
1886 | num = write_graph_chunk_base_1(f, g->base_graph); | |
1887 | hashwrite(f, g->oid.hash, the_hash_algo->rawsz); | |
1888 | return num + 1; | |
1889 | } | |
1890 | ||
1891 | static int write_graph_chunk_base(struct hashfile *f, | |
eb907191 | 1892 | void *data) |
6c622f9f | 1893 | { |
eb907191 | 1894 | struct write_commit_graph_context *ctx = data; |
6c622f9f DS |
1895 | int num = write_graph_chunk_base_1(f, ctx->new_base_graph); |
1896 | ||
1897 | if (num != ctx->num_commit_graphs_after - 1) { | |
1898 | error(_("failed to write correct number of base graph ids")); | |
1899 | return -1; | |
1900 | } | |
1901 | ||
1902 | return 0; | |
1903 | } | |
1904 | ||
238def57 | 1905 | static int write_commit_graph_file(struct write_commit_graph_context *ctx) |
08fd81c9 | 1906 | { |
238def57 | 1907 | uint32_t i; |
6c622f9f | 1908 | int fd; |
08fd81c9 | 1909 | struct hashfile *f; |
08fd81c9 | 1910 | struct lock_file lk = LOCK_INIT; |
c1665998 | 1911 | const unsigned hashsz = the_hash_algo->rawsz; |
28944739 | 1912 | struct strbuf progress_title = STRBUF_INIT; |
47410aa8 | 1913 | struct chunkfile *cf; |
72871b13 | 1914 | unsigned char file_hash[GIT_MAX_RAWSZ]; |
6c622f9f DS |
1915 | |
1916 | if (ctx->split) { | |
1917 | struct strbuf tmp_file = STRBUF_INIT; | |
1918 | ||
1919 | strbuf_addf(&tmp_file, | |
1920 | "%s/info/commit-graphs/tmp_graph_XXXXXX", | |
0bd52e27 | 1921 | ctx->odb->path); |
6c622f9f DS |
1922 | ctx->graph_name = strbuf_detach(&tmp_file, NULL); |
1923 | } else { | |
ad2dd5bb | 1924 | ctx->graph_name = get_commit_graph_filename(ctx->odb); |
6c622f9f | 1925 | } |
238def57 | 1926 | |
238def57 DS |
1927 | if (safe_create_leading_directories(ctx->graph_name)) { |
1928 | UNLEAK(ctx->graph_name); | |
1929 | error(_("unable to create leading directories of %s"), | |
1930 | ctx->graph_name); | |
1931 | return -1; | |
f4dbdfc4 | 1932 | } |
08fd81c9 | 1933 | |
6c622f9f | 1934 | if (ctx->split) { |
663b2b1b | 1935 | char *lock_name = get_commit_graph_chain_filename(ctx->odb); |
08fd81c9 | 1936 | |
45a4365c TB |
1937 | hold_lock_file_for_update_mode(&lk, lock_name, |
1938 | LOCK_DIE_ON_ERROR, 0444); | |
ef3fe214 | 1939 | free(lock_name); |
08fd81c9 | 1940 | |
6c622f9f DS |
1941 | fd = git_mkstemp_mode(ctx->graph_name, 0444); |
1942 | if (fd < 0) { | |
a2d57e22 | 1943 | error(_("unable to create temporary graph layer")); |
6c622f9f DS |
1944 | return -1; |
1945 | } | |
1946 | ||
f4d62847 TB |
1947 | if (adjust_shared_perm(ctx->graph_name)) { |
1948 | error(_("unable to adjust shared permissions for '%s'"), | |
1949 | ctx->graph_name); | |
1950 | return -1; | |
1951 | } | |
1952 | ||
6c622f9f DS |
1953 | f = hashfd(fd, ctx->graph_name); |
1954 | } else { | |
1f9becae TB |
1955 | hold_lock_file_for_update_mode(&lk, ctx->graph_name, |
1956 | LOCK_DIE_ON_ERROR, 0444); | |
a52cdce9 MÅ |
1957 | fd = get_lock_file_fd(&lk); |
1958 | f = hashfd(fd, get_lock_file_path(&lk)); | |
6c622f9f | 1959 | } |
08fd81c9 | 1960 | |
47410aa8 DS |
1961 | cf = init_chunkfile(f); |
1962 | ||
1963 | add_chunk(cf, GRAPH_CHUNKID_OIDFANOUT, GRAPH_FANOUT_SIZE, | |
1964 | write_graph_chunk_fanout); | |
48f3f8cf | 1965 | add_chunk(cf, GRAPH_CHUNKID_OIDLOOKUP, st_mult(hashsz, ctx->commits.nr), |
47410aa8 | 1966 | write_graph_chunk_oids); |
48f3f8cf | 1967 | add_chunk(cf, GRAPH_CHUNKID_DATA, st_mult(hashsz + 16, ctx->commits.nr), |
47410aa8 | 1968 | write_graph_chunk_data); |
e8b63005 | 1969 | |
47410aa8 DS |
1970 | if (ctx->write_generation_data) |
1971 | add_chunk(cf, GRAPH_CHUNKID_GENERATION_DATA, | |
48f3f8cf | 1972 | st_mult(sizeof(uint32_t), ctx->commits.nr), |
47410aa8 DS |
1973 | write_graph_chunk_generation_data); |
1974 | if (ctx->num_generation_data_overflows) | |
1975 | add_chunk(cf, GRAPH_CHUNKID_GENERATION_DATA_OVERFLOW, | |
48f3f8cf | 1976 | st_mult(sizeof(timestamp_t), ctx->num_generation_data_overflows), |
47410aa8 DS |
1977 | write_graph_chunk_generation_data_overflow); |
1978 | if (ctx->num_extra_edges) | |
1979 | add_chunk(cf, GRAPH_CHUNKID_EXTRAEDGES, | |
48f3f8cf | 1980 | st_mult(4, ctx->num_extra_edges), |
47410aa8 | 1981 | write_graph_chunk_extra_edges); |
76ffbca7 | 1982 | if (ctx->changed_paths) { |
47410aa8 | 1983 | add_chunk(cf, GRAPH_CHUNKID_BLOOMINDEXES, |
48f3f8cf | 1984 | st_mult(sizeof(uint32_t), ctx->commits.nr), |
47410aa8 DS |
1985 | write_graph_chunk_bloom_indexes); |
1986 | add_chunk(cf, GRAPH_CHUNKID_BLOOMDATA, | |
48f3f8cf TB |
1987 | st_add(sizeof(uint32_t) * 3, |
1988 | ctx->total_bloom_filter_data_size), | |
47410aa8 | 1989 | write_graph_chunk_bloom_data); |
76ffbca7 | 1990 | } |
47410aa8 DS |
1991 | if (ctx->num_commit_graphs_after > 1) |
1992 | add_chunk(cf, GRAPH_CHUNKID_BASE, | |
48f3f8cf | 1993 | st_mult(hashsz, ctx->num_commit_graphs_after - 1), |
47410aa8 | 1994 | write_graph_chunk_base); |
144354b0 DS |
1995 | |
1996 | hashwrite_be32(f, GRAPH_SIGNATURE); | |
1997 | ||
1998 | hashwrite_u8(f, GRAPH_VERSION); | |
d9fef9d9 | 1999 | hashwrite_u8(f, oid_version(the_hash_algo)); |
47410aa8 | 2000 | hashwrite_u8(f, get_num_chunks(cf)); |
6c622f9f | 2001 | hashwrite_u8(f, ctx->num_commit_graphs_after - 1); |
08fd81c9 | 2002 | |
238def57 | 2003 | if (ctx->report_progress) { |
28944739 ÆAB |
2004 | strbuf_addf(&progress_title, |
2005 | Q_("Writing out commit graph in %d pass", | |
2006 | "Writing out commit graph in %d passes", | |
c4ff24bb TB |
2007 | get_num_chunks(cf)), |
2008 | get_num_chunks(cf)); | |
238def57 | 2009 | ctx->progress = start_delayed_progress( |
28944739 | 2010 | progress_title.buf, |
48f3f8cf | 2011 | st_mult(get_num_chunks(cf), ctx->commits.nr)); |
28944739 | 2012 | } |
17e6275f | 2013 | |
47410aa8 | 2014 | write_chunkfile(cf, ctx); |
17e6275f | 2015 | |
238def57 | 2016 | stop_progress(&ctx->progress); |
28944739 | 2017 | strbuf_release(&progress_title); |
08fd81c9 | 2018 | |
6c622f9f DS |
2019 | if (ctx->split && ctx->base_graph_name && ctx->num_commit_graphs_after > 1) { |
2020 | char *new_base_hash = xstrdup(oid_to_hex(&ctx->new_base_graph->oid)); | |
ad2dd5bb | 2021 | char *new_base_name = get_split_graph_filename(ctx->new_base_graph->odb, new_base_hash); |
6c622f9f DS |
2022 | |
2023 | free(ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 2]); | |
2024 | free(ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 2]); | |
2025 | ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 2] = new_base_name; | |
2026 | ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 2] = new_base_hash; | |
2027 | } | |
2028 | ||
c3a3a964 | 2029 | close_commit_graph(ctx->r->objects); |
020406ea NS |
2030 | finalize_hashfile(f, file_hash, FSYNC_COMPONENT_COMMIT_GRAPH, |
2031 | CSUM_HASH_IN_STREAM | CSUM_FSYNC); | |
47410aa8 | 2032 | free_chunkfile(cf); |
6c622f9f DS |
2033 | |
2034 | if (ctx->split) { | |
2035 | FILE *chainf = fdopen_lock_file(&lk, "w"); | |
2036 | char *final_graph_name; | |
2037 | int result; | |
2038 | ||
2039 | close(fd); | |
2040 | ||
2041 | if (!chainf) { | |
2042 | error(_("unable to open commit-graph chain file")); | |
2043 | return -1; | |
2044 | } | |
2045 | ||
2046 | if (ctx->base_graph_name) { | |
8a6ac287 TB |
2047 | const char *dest; |
2048 | int idx = ctx->num_commit_graphs_after - 1; | |
2049 | if (ctx->num_commit_graphs_after > 1) | |
2050 | idx--; | |
2051 | ||
2052 | dest = ctx->commit_graph_filenames_after[idx]; | |
6c622f9f | 2053 | |
135a7123 DS |
2054 | if (strcmp(ctx->base_graph_name, dest)) { |
2055 | result = rename(ctx->base_graph_name, dest); | |
2056 | ||
2057 | if (result) { | |
2058 | error(_("failed to rename base commit-graph file")); | |
2059 | return -1; | |
2060 | } | |
6c622f9f DS |
2061 | } |
2062 | } else { | |
ad2dd5bb | 2063 | char *graph_name = get_commit_graph_filename(ctx->odb); |
6c622f9f | 2064 | unlink(graph_name); |
ef3fe214 | 2065 | free(graph_name); |
6c622f9f DS |
2066 | } |
2067 | ||
274bfa7f | 2068 | free(ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 1]); |
72871b13 | 2069 | ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 1] = xstrdup(hash_to_hex(file_hash)); |
ad2dd5bb | 2070 | final_graph_name = get_split_graph_filename(ctx->odb, |
6c622f9f | 2071 | ctx->commit_graph_hash_after[ctx->num_commit_graphs_after - 1]); |
274bfa7f | 2072 | free(ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 1]); |
6c622f9f DS |
2073 | ctx->commit_graph_filenames_after[ctx->num_commit_graphs_after - 1] = final_graph_name; |
2074 | ||
2075 | result = rename(ctx->graph_name, final_graph_name); | |
2076 | ||
2077 | for (i = 0; i < ctx->num_commit_graphs_after; i++) | |
a52cdce9 | 2078 | fprintf(get_lock_file_fp(&lk), "%s\n", ctx->commit_graph_hash_after[i]); |
6c622f9f DS |
2079 | |
2080 | if (result) { | |
2081 | error(_("failed to rename temporary commit-graph file")); | |
2082 | return -1; | |
2083 | } | |
2084 | } | |
2085 | ||
08fd81c9 DS |
2086 | commit_lock_file(&lk); |
2087 | ||
238def57 DS |
2088 | return 0; |
2089 | } | |
2090 | ||
1771be90 DS |
2091 | static void split_graph_merge_strategy(struct write_commit_graph_context *ctx) |
2092 | { | |
8da02ce6 AH |
2093 | struct commit_graph *g; |
2094 | uint32_t num_commits; | |
fdbde82f | 2095 | enum commit_graph_split_flags flags = COMMIT_GRAPH_SPLIT_UNSPECIFIED; |
1771be90 DS |
2096 | uint32_t i; |
2097 | ||
c2bc6e6a DS |
2098 | int max_commits = 0; |
2099 | int size_mult = 2; | |
2100 | ||
98bb7961 TB |
2101 | if (ctx->opts) { |
2102 | max_commits = ctx->opts->max_commits; | |
63020f17 | 2103 | |
98bb7961 TB |
2104 | if (ctx->opts->size_multiple) |
2105 | size_mult = ctx->opts->size_multiple; | |
fdbde82f | 2106 | |
98bb7961 | 2107 | flags = ctx->opts->split_flags; |
c2bc6e6a DS |
2108 | } |
2109 | ||
1771be90 | 2110 | g = ctx->r->objects->commit_graph; |
8da02ce6 | 2111 | num_commits = ctx->commits.nr; |
8a6ac287 TB |
2112 | if (flags == COMMIT_GRAPH_SPLIT_REPLACE) |
2113 | ctx->num_commit_graphs_after = 1; | |
2114 | else | |
2115 | ctx->num_commit_graphs_after = ctx->num_commit_graphs_before + 1; | |
1771be90 | 2116 | |
8a6ac287 TB |
2117 | if (flags != COMMIT_GRAPH_SPLIT_MERGE_PROHIBITED && |
2118 | flags != COMMIT_GRAPH_SPLIT_REPLACE) { | |
19565d09 | 2119 | while (g && (g->num_commits <= st_mult(size_mult, num_commits) || |
fdbde82f TB |
2120 | (max_commits && num_commits > max_commits))) { |
2121 | if (g->odb != ctx->odb) | |
2122 | break; | |
c523035c | 2123 | |
19565d09 TB |
2124 | if (unsigned_add_overflows(num_commits, g->num_commits)) |
2125 | die(_("cannot merge graphs with %"PRIuMAX", " | |
2126 | "%"PRIuMAX" commits"), | |
2127 | (uintmax_t)num_commits, | |
2128 | (uintmax_t)g->num_commits); | |
fdbde82f TB |
2129 | num_commits += g->num_commits; |
2130 | g = g->base_graph; | |
1771be90 | 2131 | |
fdbde82f TB |
2132 | ctx->num_commit_graphs_after--; |
2133 | } | |
1771be90 DS |
2134 | } |
2135 | ||
8a6ac287 TB |
2136 | if (flags != COMMIT_GRAPH_SPLIT_REPLACE) |
2137 | ctx->new_base_graph = g; | |
2138 | else if (ctx->num_commit_graphs_after != 1) | |
2139 | BUG("split_graph_merge_strategy: num_commit_graphs_after " | |
2140 | "should be 1 with --split=replace"); | |
1771be90 | 2141 | |
c523035c | 2142 | if (ctx->num_commit_graphs_after == 2) { |
ad2dd5bb | 2143 | char *old_graph_name = get_commit_graph_filename(g->odb); |
c523035c DS |
2144 | |
2145 | if (!strcmp(g->filename, old_graph_name) && | |
ad2dd5bb | 2146 | g->odb != ctx->odb) { |
c523035c DS |
2147 | ctx->num_commit_graphs_after = 1; |
2148 | ctx->new_base_graph = NULL; | |
2149 | } | |
2150 | ||
2151 | free(old_graph_name); | |
2152 | } | |
2153 | ||
b78a556a TB |
2154 | CALLOC_ARRAY(ctx->commit_graph_filenames_after, ctx->num_commit_graphs_after); |
2155 | CALLOC_ARRAY(ctx->commit_graph_hash_after, ctx->num_commit_graphs_after); | |
1771be90 DS |
2156 | |
2157 | for (i = 0; i < ctx->num_commit_graphs_after && | |
2158 | i < ctx->num_commit_graphs_before; i++) | |
2159 | ctx->commit_graph_filenames_after[i] = xstrdup(ctx->commit_graph_filenames_before[i]); | |
2160 | ||
2161 | i = ctx->num_commit_graphs_before - 1; | |
2162 | g = ctx->r->objects->commit_graph; | |
2163 | ||
2164 | while (g) { | |
2165 | if (i < ctx->num_commit_graphs_after) | |
2166 | ctx->commit_graph_hash_after[i] = xstrdup(oid_to_hex(&g->oid)); | |
2167 | ||
1fdc383c AK |
2168 | /* |
2169 | * If the topmost remaining layer has generation data chunk, the | |
2170 | * resultant layer also has generation data chunk. | |
2171 | */ | |
2172 | if (i == ctx->num_commit_graphs_after - 2) | |
2173 | ctx->write_generation_data = !!g->chunk_generation_data; | |
2174 | ||
1771be90 DS |
2175 | i--; |
2176 | g = g->base_graph; | |
2177 | } | |
2178 | } | |
2179 | ||
2180 | static void merge_commit_graph(struct write_commit_graph_context *ctx, | |
2181 | struct commit_graph *g) | |
2182 | { | |
2183 | uint32_t i; | |
2184 | uint32_t offset = g->num_commits_in_base; | |
2185 | ||
d76e0a74 TB |
2186 | if (unsigned_add_overflows(ctx->commits.nr, g->num_commits)) |
2187 | die(_("cannot merge graph %s, too many commits: %"PRIuMAX), | |
2188 | oid_to_hex(&g->oid), | |
2189 | (uintmax_t)st_add(ctx->commits.nr, g->num_commits)); | |
2190 | ||
1771be90 DS |
2191 | ALLOC_GROW(ctx->commits.list, ctx->commits.nr + g->num_commits, ctx->commits.alloc); |
2192 | ||
2193 | for (i = 0; i < g->num_commits; i++) { | |
2194 | struct object_id oid; | |
2195 | struct commit *result; | |
2196 | ||
2197 | display_progress(ctx->progress, i + 1); | |
2198 | ||
2199 | load_oid_from_graph(g, i + offset, &oid); | |
2200 | ||
2201 | /* only add commits if they still exist in the repo */ | |
2202 | result = lookup_commit_reference_gently(ctx->r, &oid, 1); | |
2203 | ||
2204 | if (result) { | |
2205 | ctx->commits.list[ctx->commits.nr] = result; | |
2206 | ctx->commits.nr++; | |
2207 | } | |
2208 | } | |
2209 | } | |
2210 | ||
2211 | static int commit_compare(const void *_a, const void *_b) | |
2212 | { | |
2213 | const struct commit *a = *(const struct commit **)_a; | |
2214 | const struct commit *b = *(const struct commit **)_b; | |
2215 | return oidcmp(&a->object.oid, &b->object.oid); | |
2216 | } | |
2217 | ||
2218 | static void sort_and_scan_merged_commits(struct write_commit_graph_context *ctx) | |
2219 | { | |
150f1157 | 2220 | uint32_t i, dedup_i = 0; |
1771be90 DS |
2221 | |
2222 | if (ctx->report_progress) | |
2223 | ctx->progress = start_delayed_progress( | |
2224 | _("Scanning merged commits"), | |
2225 | ctx->commits.nr); | |
2226 | ||
2227 | QSORT(ctx->commits.list, ctx->commits.nr, commit_compare); | |
2228 | ||
2229 | ctx->num_extra_edges = 0; | |
2230 | for (i = 0; i < ctx->commits.nr; i++) { | |
40112249 | 2231 | display_progress(ctx->progress, i + 1); |
1771be90 DS |
2232 | |
2233 | if (i && oideq(&ctx->commits.list[i - 1]->object.oid, | |
2234 | &ctx->commits.list[i]->object.oid)) { | |
150f1157 DS |
2235 | /* |
2236 | * Silently ignore duplicates. These were likely | |
2237 | * created due to a commit appearing in multiple | |
2238 | * layers of the chain, which is unexpected but | |
2239 | * not invalid. We should make sure there is a | |
2240 | * unique copy in the new layer. | |
2241 | */ | |
1771be90 | 2242 | } else { |
689a146c | 2243 | unsigned int num_parents; |
1771be90 | 2244 | |
150f1157 DS |
2245 | ctx->commits.list[dedup_i] = ctx->commits.list[i]; |
2246 | dedup_i++; | |
2247 | ||
689a146c | 2248 | num_parents = commit_list_count(ctx->commits.list[i]->parents); |
1771be90 | 2249 | if (num_parents > 2) |
a35bea40 | 2250 | ctx->num_extra_edges += num_parents - 1; |
1771be90 DS |
2251 | } |
2252 | } | |
2253 | ||
150f1157 DS |
2254 | ctx->commits.nr = dedup_i; |
2255 | ||
1771be90 DS |
2256 | stop_progress(&ctx->progress); |
2257 | } | |
2258 | ||
2259 | static void merge_commit_graphs(struct write_commit_graph_context *ctx) | |
2260 | { | |
2261 | struct commit_graph *g = ctx->r->objects->commit_graph; | |
2262 | uint32_t current_graph_number = ctx->num_commit_graphs_before; | |
1771be90 DS |
2263 | |
2264 | while (g && current_graph_number >= ctx->num_commit_graphs_after) { | |
2265 | current_graph_number--; | |
2266 | ||
d68ce906 RS |
2267 | if (ctx->report_progress) |
2268 | ctx->progress = start_delayed_progress(_("Merging commit-graph"), 0); | |
1771be90 DS |
2269 | |
2270 | merge_commit_graph(ctx, g); | |
2271 | stop_progress(&ctx->progress); | |
1771be90 DS |
2272 | |
2273 | g = g->base_graph; | |
2274 | } | |
2275 | ||
2276 | if (g) { | |
2277 | ctx->new_base_graph = g; | |
2278 | ctx->new_num_commits_in_base = g->num_commits + g->num_commits_in_base; | |
2279 | } | |
2280 | ||
2281 | if (ctx->new_base_graph) | |
2282 | ctx->base_graph_name = xstrdup(ctx->new_base_graph->filename); | |
2283 | ||
2284 | sort_and_scan_merged_commits(ctx); | |
2285 | } | |
2286 | ||
8d84097f DS |
2287 | static void mark_commit_graphs(struct write_commit_graph_context *ctx) |
2288 | { | |
2289 | uint32_t i; | |
2290 | time_t now = time(NULL); | |
2291 | ||
2292 | for (i = ctx->num_commit_graphs_after - 1; i < ctx->num_commit_graphs_before; i++) { | |
2293 | struct stat st; | |
2294 | struct utimbuf updated_time; | |
2295 | ||
7c898554 ÆAB |
2296 | if (stat(ctx->commit_graph_filenames_before[i], &st) < 0) |
2297 | continue; | |
8d84097f DS |
2298 | |
2299 | updated_time.actime = st.st_atime; | |
2300 | updated_time.modtime = now; | |
2301 | utime(ctx->commit_graph_filenames_before[i], &updated_time); | |
2302 | } | |
2303 | } | |
2304 | ||
2305 | static void expire_commit_graphs(struct write_commit_graph_context *ctx) | |
2306 | { | |
2307 | struct strbuf path = STRBUF_INIT; | |
2308 | DIR *dir; | |
2309 | struct dirent *de; | |
2310 | size_t dirnamelen; | |
c2bc6e6a DS |
2311 | timestamp_t expire_time = time(NULL); |
2312 | ||
98bb7961 TB |
2313 | if (ctx->opts && ctx->opts->expire_time) |
2314 | expire_time = ctx->opts->expire_time; | |
ba41112a | 2315 | if (!ctx->split) { |
663b2b1b | 2316 | char *chain_file_name = get_commit_graph_chain_filename(ctx->odb); |
ba41112a DS |
2317 | unlink(chain_file_name); |
2318 | free(chain_file_name); | |
2319 | ctx->num_commit_graphs_after = 0; | |
2320 | } | |
8d84097f | 2321 | |
0bd52e27 | 2322 | strbuf_addstr(&path, ctx->odb->path); |
8d84097f DS |
2323 | strbuf_addstr(&path, "/info/commit-graphs"); |
2324 | dir = opendir(path.buf); | |
2325 | ||
0aa6bce7 RS |
2326 | if (!dir) |
2327 | goto out; | |
8d84097f DS |
2328 | |
2329 | strbuf_addch(&path, '/'); | |
2330 | dirnamelen = path.len; | |
2331 | while ((de = readdir(dir)) != NULL) { | |
2332 | struct stat st; | |
2333 | uint32_t i, found = 0; | |
2334 | ||
2335 | strbuf_setlen(&path, dirnamelen); | |
2336 | strbuf_addstr(&path, de->d_name); | |
2337 | ||
7c898554 ÆAB |
2338 | if (stat(path.buf, &st) < 0) |
2339 | continue; | |
8d84097f DS |
2340 | |
2341 | if (st.st_mtime > expire_time) | |
2342 | continue; | |
2343 | if (path.len < 6 || strcmp(path.buf + path.len - 6, ".graph")) | |
2344 | continue; | |
2345 | ||
2346 | for (i = 0; i < ctx->num_commit_graphs_after; i++) { | |
2347 | if (!strcmp(ctx->commit_graph_filenames_after[i], | |
2348 | path.buf)) { | |
2349 | found = 1; | |
2350 | break; | |
2351 | } | |
2352 | } | |
2353 | ||
2354 | if (!found) | |
2355 | unlink(path.buf); | |
8d84097f | 2356 | } |
0aa6bce7 RS |
2357 | |
2358 | out: | |
12f1ae53 ML |
2359 | if(dir) |
2360 | closedir(dir); | |
0aa6bce7 | 2361 | strbuf_release(&path); |
8d84097f DS |
2362 | } |
2363 | ||
0bd52e27 | 2364 | int write_commit_graph(struct object_directory *odb, |
4a047908 | 2365 | const struct string_list *const pack_indexes, |
6830c360 | 2366 | struct oidset *commits, |
39d88318 | 2367 | enum commit_graph_write_flags flags, |
98bb7961 | 2368 | const struct commit_graph_opts *opts) |
238def57 | 2369 | { |
c7ef8fe6 | 2370 | struct repository *r = the_repository; |
238def57 | 2371 | struct write_commit_graph_context *ctx; |
1cbdbf3b | 2372 | uint32_t i; |
e103f727 | 2373 | int res = 0; |
8a6ac287 | 2374 | int replace = 0; |
9a7a9ed1 | 2375 | struct bloom_filter_settings bloom_settings = DEFAULT_BLOOM_FILTER_SETTINGS; |
72a2bfca | 2376 | struct topo_level_slab topo_levels; |
08fd81c9 | 2377 | |
c7ef8fe6 DS |
2378 | prepare_repo_settings(r); |
2379 | if (!r->settings.core_commit_graph) { | |
85102ac7 DS |
2380 | warning(_("attempting to write a commit-graph, but 'core.commitGraph' is disabled")); |
2381 | return 0; | |
2382 | } | |
c7ef8fe6 | 2383 | if (!commit_graph_compatible(r)) |
e103f727 | 2384 | return 0; |
d6538246 | 2385 | |
ca56dadb | 2386 | CALLOC_ARRAY(ctx, 1); |
c7ef8fe6 | 2387 | ctx->r = r; |
0bd52e27 | 2388 | ctx->odb = odb; |
39d88318 SG |
2389 | ctx->append = flags & COMMIT_GRAPH_WRITE_APPEND ? 1 : 0; |
2390 | ctx->report_progress = flags & COMMIT_GRAPH_WRITE_PROGRESS ? 1 : 0; | |
2391 | ctx->split = flags & COMMIT_GRAPH_WRITE_SPLIT ? 1 : 0; | |
98bb7961 | 2392 | ctx->opts = opts; |
f97b9325 | 2393 | ctx->total_bloom_filter_data_size = 0; |
702110aa | 2394 | ctx->write_generation_data = (get_configured_generation_version(r) == 2); |
e8b63005 | 2395 | ctx->num_generation_data_overflows = 0; |
6c622f9f | 2396 | |
9a7a9ed1 TB |
2397 | bloom_settings.bits_per_entry = git_env_ulong("GIT_TEST_BLOOM_SETTINGS_BITS_PER_ENTRY", |
2398 | bloom_settings.bits_per_entry); | |
2399 | bloom_settings.num_hashes = git_env_ulong("GIT_TEST_BLOOM_SETTINGS_NUM_HASHES", | |
2400 | bloom_settings.num_hashes); | |
2401 | bloom_settings.max_changed_paths = git_env_ulong("GIT_TEST_BLOOM_SETTINGS_MAX_CHANGED_PATHS", | |
2402 | bloom_settings.max_changed_paths); | |
2403 | ctx->bloom_settings = &bloom_settings; | |
2404 | ||
72a2bfca AK |
2405 | init_topo_level_slab(&topo_levels); |
2406 | ctx->topo_levels = &topo_levels; | |
2407 | ||
bc50d6c9 | 2408 | prepare_commit_graph(ctx->r); |
72a2bfca AK |
2409 | if (ctx->r->objects->commit_graph) { |
2410 | struct commit_graph *g = ctx->r->objects->commit_graph; | |
2411 | ||
2412 | while (g) { | |
2413 | g->topo_levels = &topo_levels; | |
2414 | g = g->base_graph; | |
2415 | } | |
2416 | } | |
2417 | ||
0087a87b DS |
2418 | if (flags & COMMIT_GRAPH_WRITE_BLOOM_FILTERS) |
2419 | ctx->changed_paths = 1; | |
2420 | if (!(flags & COMMIT_GRAPH_NO_WRITE_BLOOM_FILTERS)) { | |
2421 | struct commit_graph *g; | |
0087a87b DS |
2422 | |
2423 | g = ctx->r->objects->commit_graph; | |
2424 | ||
2425 | /* We have changed-paths already. Keep them in the next graph */ | |
2426 | if (g && g->chunk_bloom_data) { | |
2427 | ctx->changed_paths = 1; | |
2428 | ctx->bloom_settings = g->bloom_filter_settings; | |
2429 | } | |
2430 | } | |
2431 | ||
6c622f9f | 2432 | if (ctx->split) { |
bc50d6c9 | 2433 | struct commit_graph *g = ctx->r->objects->commit_graph; |
6c622f9f DS |
2434 | |
2435 | while (g) { | |
2436 | ctx->num_commit_graphs_before++; | |
2437 | g = g->base_graph; | |
2438 | } | |
2439 | ||
2440 | if (ctx->num_commit_graphs_before) { | |
2441 | ALLOC_ARRAY(ctx->commit_graph_filenames_before, ctx->num_commit_graphs_before); | |
2442 | i = ctx->num_commit_graphs_before; | |
2443 | g = ctx->r->objects->commit_graph; | |
2444 | ||
2445 | while (g) { | |
2446 | ctx->commit_graph_filenames_before[--i] = xstrdup(g->filename); | |
2447 | g = g->base_graph; | |
2448 | } | |
2449 | } | |
8a6ac287 | 2450 | |
98bb7961 TB |
2451 | if (ctx->opts) |
2452 | replace = ctx->opts->split_flags & COMMIT_GRAPH_SPLIT_REPLACE; | |
6c622f9f | 2453 | } |
c9905bea | 2454 | |
afe27c88 | 2455 | ctx->approx_nr_objects = repo_approximate_object_count(the_repository); |
c9905bea | 2456 | |
c9905bea DS |
2457 | if (ctx->append && ctx->r->objects->commit_graph) { |
2458 | struct commit_graph *g = ctx->r->objects->commit_graph; | |
2459 | for (i = 0; i < g->num_commits; i++) { | |
a5f1c448 | 2460 | struct object_id oid; |
588af1bf | 2461 | oidread(&oid, g->chunk_oid_lookup + st_mult(g->hash_len, i)); |
a5f1c448 | 2462 | oid_array_append(&ctx->oids, &oid); |
7547b95b DS |
2463 | } |
2464 | } | |
2465 | ||
049d51a2 | 2466 | if (pack_indexes) { |
3d112755 | 2467 | ctx->order_by_pack = 1; |
ef5b83f2 DS |
2468 | if ((res = fill_oids_from_packs(ctx, pack_indexes))) |
2469 | goto cleanup; | |
3d5df01b DS |
2470 | } |
2471 | ||
6830c360 TB |
2472 | if (commits) { |
2473 | if ((res = fill_oids_from_commits(ctx, commits))) | |
7c5c9b9c SG |
2474 | goto cleanup; |
2475 | } | |
3d5df01b | 2476 | |
9b6606f4 | 2477 | if (!pack_indexes && !commits) { |
3d112755 | 2478 | ctx->order_by_pack = 1; |
b2c83060 | 2479 | fill_oids_from_all_packs(ctx); |
3d112755 | 2480 | } |
049d51a2 | 2481 | |
c9905bea | 2482 | close_reachable(ctx); |
08fd81c9 | 2483 | |
f998d542 | 2484 | copy_oids_to_commits(ctx); |
08fd81c9 | 2485 | |
c9905bea | 2486 | if (ctx->commits.nr >= GRAPH_EDGE_LAST_MASK) { |
e103f727 DS |
2487 | error(_("too many commits to write graph")); |
2488 | res = -1; | |
2489 | goto cleanup; | |
2490 | } | |
08fd81c9 | 2491 | |
8a6ac287 | 2492 | if (!ctx->commits.nr && !replace) |
6c622f9f DS |
2493 | goto cleanup; |
2494 | ||
1771be90 DS |
2495 | if (ctx->split) { |
2496 | split_graph_merge_strategy(ctx); | |
2497 | ||
8a6ac287 TB |
2498 | if (!replace) |
2499 | merge_commit_graphs(ctx); | |
1771be90 | 2500 | } else |
6c622f9f DS |
2501 | ctx->num_commit_graphs_after = 1; |
2502 | ||
fde55b09 | 2503 | ctx->trust_generation_numbers = validate_mixed_generation_chain(ctx->r->objects->commit_graph); |
1fdc383c | 2504 | |
9c2c0a82 DS |
2505 | compute_topological_levels(ctx); |
2506 | if (ctx->write_generation_data) | |
2507 | compute_generation_numbers(ctx); | |
08fd81c9 | 2508 | |
f97b9325 GS |
2509 | if (ctx->changed_paths) |
2510 | compute_bloom_filters(ctx); | |
2511 | ||
238def57 | 2512 | res = write_commit_graph_file(ctx); |
08fd81c9 | 2513 | |
ba41112a | 2514 | if (ctx->split) |
8d84097f | 2515 | mark_commit_graphs(ctx); |
ba41112a DS |
2516 | |
2517 | expire_commit_graphs(ctx); | |
8d84097f | 2518 | |
e103f727 | 2519 | cleanup: |
238def57 | 2520 | free(ctx->graph_name); |
d9c84c6d | 2521 | free(ctx->base_graph_name); |
c9905bea | 2522 | free(ctx->commits.list); |
a5f1c448 | 2523 | oid_array_clear(&ctx->oids); |
bf4bb9f9 | 2524 | clear_topo_level_slab(&topo_levels); |
6c622f9f DS |
2525 | |
2526 | if (ctx->commit_graph_filenames_after) { | |
2527 | for (i = 0; i < ctx->num_commit_graphs_after; i++) { | |
2528 | free(ctx->commit_graph_filenames_after[i]); | |
2529 | free(ctx->commit_graph_hash_after[i]); | |
2530 | } | |
2531 | ||
2532 | for (i = 0; i < ctx->num_commit_graphs_before; i++) | |
2533 | free(ctx->commit_graph_filenames_before[i]); | |
2534 | ||
2535 | free(ctx->commit_graph_filenames_after); | |
2536 | free(ctx->commit_graph_filenames_before); | |
2537 | free(ctx->commit_graph_hash_after); | |
2538 | } | |
2539 | ||
c9905bea | 2540 | free(ctx); |
e103f727 DS |
2541 | |
2542 | return res; | |
08fd81c9 | 2543 | } |
283e68c7 | 2544 | |
41df0e30 | 2545 | #define VERIFY_COMMIT_GRAPH_ERROR_HASH 2 |
283e68c7 DS |
2546 | static int verify_commit_graph_error; |
2547 | ||
48ca53ca | 2548 | __attribute__((format (printf, 1, 2))) |
283e68c7 DS |
2549 | static void graph_report(const char *fmt, ...) |
2550 | { | |
2551 | va_list ap; | |
2552 | ||
2553 | verify_commit_graph_error = 1; | |
2554 | va_start(ap, fmt); | |
2555 | vfprintf(stderr, fmt, ap); | |
2556 | fprintf(stderr, "\n"); | |
2557 | va_end(ap); | |
2558 | } | |
2559 | ||
15316a47 TB |
2560 | static int commit_graph_checksum_valid(struct commit_graph *g) |
2561 | { | |
2562 | return hashfile_checksum_valid(g->data, g->data_len); | |
2563 | } | |
2564 | ||
eb319d67 TB |
2565 | static int verify_one_commit_graph(struct repository *r, |
2566 | struct commit_graph *g, | |
9281cd07 TB |
2567 | struct progress *progress, |
2568 | uint64_t *seen) | |
283e68c7 | 2569 | { |
9bda8467 | 2570 | uint32_t i, cur_fanout_pos = 0; |
72871b13 | 2571 | struct object_id prev_oid, cur_oid; |
db6044d7 TB |
2572 | struct commit *seen_gen_zero = NULL; |
2573 | struct commit *seen_gen_non_zero = NULL; | |
283e68c7 | 2574 | |
2ac138d5 | 2575 | verify_commit_graph_error = verify_commit_graph_lite(g); |
9bda8467 DS |
2576 | if (verify_commit_graph_error) |
2577 | return verify_commit_graph_error; | |
2578 | ||
15316a47 | 2579 | if (!commit_graph_checksum_valid(g)) { |
41df0e30 DS |
2580 | graph_report(_("the commit-graph file has incorrect checksum and is likely corrupt")); |
2581 | verify_commit_graph_error = VERIFY_COMMIT_GRAPH_ERROR_HASH; | |
2582 | } | |
2583 | ||
9bda8467 | 2584 | for (i = 0; i < g->num_commits; i++) { |
2e3c0737 DS |
2585 | struct commit *graph_commit; |
2586 | ||
9a25cad7 | 2587 | oidread(&cur_oid, g->chunk_oid_lookup + st_mult(g->hash_len, i)); |
9bda8467 DS |
2588 | |
2589 | if (i && oidcmp(&prev_oid, &cur_oid) >= 0) | |
93b4405f | 2590 | graph_report(_("commit-graph has incorrect OID order: %s then %s"), |
9bda8467 DS |
2591 | oid_to_hex(&prev_oid), |
2592 | oid_to_hex(&cur_oid)); | |
2593 | ||
2594 | oidcpy(&prev_oid, &cur_oid); | |
2595 | ||
2596 | while (cur_oid.hash[0] > cur_fanout_pos) { | |
2597 | uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos); | |
2598 | ||
2599 | if (i != fanout_value) | |
93b4405f | 2600 | graph_report(_("commit-graph has incorrect fanout value: fanout[%d] = %u != %u"), |
9bda8467 DS |
2601 | cur_fanout_pos, fanout_value, i); |
2602 | cur_fanout_pos++; | |
2603 | } | |
2e3c0737 | 2604 | |
82952964 | 2605 | graph_commit = lookup_commit(r, &cur_oid); |
4f542b7a | 2606 | if (!parse_commit_in_graph_one(r, g, graph_commit)) |
93b4405f | 2607 | graph_report(_("failed to parse commit %s from commit-graph"), |
2e3c0737 | 2608 | oid_to_hex(&cur_oid)); |
9bda8467 DS |
2609 | } |
2610 | ||
2611 | while (cur_fanout_pos < 256) { | |
2612 | uint32_t fanout_value = get_be32(g->chunk_oid_fanout + cur_fanout_pos); | |
2613 | ||
2614 | if (g->num_commits != fanout_value) | |
93b4405f | 2615 | graph_report(_("commit-graph has incorrect fanout value: fanout[%d] = %u != %u"), |
9bda8467 DS |
2616 | cur_fanout_pos, fanout_value, i); |
2617 | ||
2618 | cur_fanout_pos++; | |
2619 | } | |
2620 | ||
41df0e30 | 2621 | if (verify_commit_graph_error & ~VERIFY_COMMIT_GRAPH_ERROR_HASH) |
96af91d4 DS |
2622 | return verify_commit_graph_error; |
2623 | ||
2624 | for (i = 0; i < g->num_commits; i++) { | |
2e3c0737 | 2625 | struct commit *graph_commit, *odb_commit; |
53614b13 | 2626 | struct commit_list *graph_parents, *odb_parents; |
d7f92784 AK |
2627 | timestamp_t max_generation = 0; |
2628 | timestamp_t generation; | |
96af91d4 | 2629 | |
9281cd07 | 2630 | display_progress(progress, ++(*seen)); |
9a25cad7 | 2631 | oidread(&cur_oid, g->chunk_oid_lookup + st_mult(g->hash_len, i)); |
96af91d4 | 2632 | |
82952964 | 2633 | graph_commit = lookup_commit(r, &cur_oid); |
a378509e | 2634 | odb_commit = (struct commit *)create_object(r, &cur_oid, alloc_commit_node(r)); |
4a93b899 | 2635 | if (repo_parse_commit_internal(r, odb_commit, 0, 0)) { |
93b4405f | 2636 | graph_report(_("failed to parse commit %s from object database for commit-graph"), |
96af91d4 DS |
2637 | oid_to_hex(&cur_oid)); |
2638 | continue; | |
2639 | } | |
2e3c0737 | 2640 | |
4f542b7a | 2641 | if (!oideq(&get_commit_tree_in_graph_one(r, g, graph_commit)->object.oid, |
2e3c0737 | 2642 | get_commit_tree_oid(odb_commit))) |
93b4405f | 2643 | graph_report(_("root tree OID for commit %s in commit-graph is %s != %s"), |
2e3c0737 DS |
2644 | oid_to_hex(&cur_oid), |
2645 | oid_to_hex(get_commit_tree_oid(graph_commit)), | |
2646 | oid_to_hex(get_commit_tree_oid(odb_commit))); | |
53614b13 DS |
2647 | |
2648 | graph_parents = graph_commit->parents; | |
2649 | odb_parents = odb_commit->parents; | |
2650 | ||
2651 | while (graph_parents) { | |
afe8a907 | 2652 | if (!odb_parents) { |
93b4405f | 2653 | graph_report(_("commit-graph parent list for commit %s is too long"), |
53614b13 DS |
2654 | oid_to_hex(&cur_oid)); |
2655 | break; | |
2656 | } | |
2657 | ||
3da4b609 DS |
2658 | /* parse parent in case it is in a base graph */ |
2659 | parse_commit_in_graph_one(r, g, graph_parents->item); | |
2660 | ||
9001dc2a | 2661 | if (!oideq(&graph_parents->item->object.oid, &odb_parents->item->object.oid)) |
93b4405f | 2662 | graph_report(_("commit-graph parent for %s is %s != %s"), |
53614b13 DS |
2663 | oid_to_hex(&cur_oid), |
2664 | oid_to_hex(&graph_parents->item->object.oid), | |
2665 | oid_to_hex(&odb_parents->item->object.oid)); | |
2666 | ||
868c9911 | 2667 | generation = commit_graph_generation_from_graph(graph_parents->item); |
c752ad09 AK |
2668 | if (generation > max_generation) |
2669 | max_generation = generation; | |
1373e547 | 2670 | |
53614b13 DS |
2671 | graph_parents = graph_parents->next; |
2672 | odb_parents = odb_parents->next; | |
2673 | } | |
2674 | ||
afe8a907 | 2675 | if (odb_parents) |
93b4405f | 2676 | graph_report(_("commit-graph parent list for commit %s terminates early"), |
53614b13 | 2677 | oid_to_hex(&cur_oid)); |
1373e547 | 2678 | |
db6044d7 TB |
2679 | if (commit_graph_generation_from_graph(graph_commit)) |
2680 | seen_gen_non_zero = graph_commit; | |
2681 | else | |
2682 | seen_gen_zero = graph_commit; | |
1373e547 | 2683 | |
db6044d7 | 2684 | if (seen_gen_zero) |
1373e547 DS |
2685 | continue; |
2686 | ||
2687 | /* | |
e8b63005 AK |
2688 | * If we are using topological level and one of our parents has |
2689 | * generation GENERATION_NUMBER_V1_MAX, then our generation is | |
2690 | * also GENERATION_NUMBER_V1_MAX. Decrement to avoid extra logic | |
2691 | * in the following condition. | |
1373e547 | 2692 | */ |
1fdc383c | 2693 | if (!g->read_generation_data && max_generation == GENERATION_NUMBER_V1_MAX) |
1373e547 DS |
2694 | max_generation--; |
2695 | ||
c752ad09 | 2696 | generation = commit_graph_generation(graph_commit); |
e8b63005 AK |
2697 | if (generation < max_generation + 1) |
2698 | graph_report(_("commit-graph generation for commit %s is %"PRItime" < %"PRItime), | |
1373e547 | 2699 | oid_to_hex(&cur_oid), |
c752ad09 | 2700 | generation, |
1373e547 | 2701 | max_generation + 1); |
88968ebf DS |
2702 | |
2703 | if (graph_commit->date != odb_commit->date) | |
93b4405f | 2704 | graph_report(_("commit date for commit %s in commit-graph is %"PRItime" != %"PRItime), |
88968ebf DS |
2705 | oid_to_hex(&cur_oid), |
2706 | graph_commit->date, | |
2707 | odb_commit->date); | |
96af91d4 | 2708 | } |
db6044d7 TB |
2709 | |
2710 | if (seen_gen_zero && seen_gen_non_zero) | |
2711 | graph_report(_("commit-graph has both zero and non-zero " | |
2712 | "generations (e.g., commits '%s' and '%s')"), | |
2713 | oid_to_hex(&seen_gen_zero->object.oid), | |
2714 | oid_to_hex(&seen_gen_non_zero->object.oid)); | |
96af91d4 | 2715 | |
eb319d67 TB |
2716 | return verify_commit_graph_error; |
2717 | } | |
2718 | ||
2719 | int verify_commit_graph(struct repository *r, struct commit_graph *g, int flags) | |
2720 | { | |
9281cd07 | 2721 | struct progress *progress = NULL; |
eb319d67 | 2722 | int local_error = 0; |
9281cd07 | 2723 | uint64_t seen = 0; |
eb319d67 TB |
2724 | |
2725 | if (!g) { | |
2726 | graph_report("no commit-graph file loaded"); | |
2727 | return 1; | |
2728 | } | |
2729 | ||
9281cd07 TB |
2730 | if (flags & COMMIT_GRAPH_WRITE_PROGRESS) { |
2731 | uint64_t total = g->num_commits; | |
2732 | if (!(flags & COMMIT_GRAPH_VERIFY_SHALLOW)) | |
2733 | total += g->num_commits_in_base; | |
2734 | ||
2735 | progress = start_progress(_("Verifying commits in commit graph"), | |
2736 | total); | |
2737 | } | |
7248857b | 2738 | |
9281cd07 TB |
2739 | for (; g; g = g->base_graph) { |
2740 | local_error |= verify_one_commit_graph(r, g, progress, &seen); | |
f5facaa4 TB |
2741 | if (flags & COMMIT_GRAPH_VERIFY_SHALLOW) |
2742 | break; | |
2743 | } | |
3da4b609 | 2744 | |
9281cd07 | 2745 | stop_progress(&progress); |
3da4b609 DS |
2746 | |
2747 | return local_error; | |
283e68c7 | 2748 | } |
c3756d5b JT |
2749 | |
2750 | void free_commit_graph(struct commit_graph *g) | |
2751 | { | |
09a75abb JK |
2752 | while (g) { |
2753 | struct commit_graph *next = g->base_graph; | |
2754 | ||
2755 | if (g->data) | |
2756 | munmap((void *)g->data, g->data_len); | |
2757 | free(g->filename); | |
2758 | free(g->bloom_filter_settings); | |
2759 | free(g); | |
2760 | ||
2761 | g = next; | |
c3756d5b | 2762 | } |
c3756d5b | 2763 | } |
6abada18 JK |
2764 | |
2765 | void disable_commit_graph(struct repository *r) | |
2766 | { | |
2767 | r->commit_graph_disabled = 1; | |
2768 | } |