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Commit | Line | Data |
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fff42755 VM |
1 | #include "cache.h" |
2 | #include "commit.h" | |
3 | #include "tag.h" | |
4 | #include "diff.h" | |
5 | #include "revision.h" | |
6 | #include "progress.h" | |
7 | #include "list-objects.h" | |
8 | #include "pack.h" | |
9 | #include "pack-bitmap.h" | |
10 | #include "pack-revindex.h" | |
11 | #include "pack-objects.h" | |
0317f455 | 12 | #include "packfile.h" |
a80d72db SB |
13 | #include "repository.h" |
14 | #include "object-store.h" | |
fff42755 VM |
15 | |
16 | /* | |
17 | * An entry on the bitmap index, representing the bitmap for a given | |
18 | * commit. | |
19 | */ | |
20 | struct stored_bitmap { | |
21 | unsigned char sha1[20]; | |
22 | struct ewah_bitmap *root; | |
23 | struct stored_bitmap *xor; | |
24 | int flags; | |
25 | }; | |
26 | ||
27 | /* | |
3ae5fa07 | 28 | * The active bitmap index for a repository. By design, repositories only have |
fff42755 VM |
29 | * a single bitmap index available (the index for the biggest packfile in |
30 | * the repository), since bitmap indexes need full closure. | |
31 | * | |
32 | * If there is more than one bitmap index available (e.g. because of alternates), | |
33 | * the active bitmap index is the largest one. | |
34 | */ | |
3ae5fa07 | 35 | struct bitmap_index { |
fff42755 VM |
36 | /* Packfile to which this bitmap index belongs to */ |
37 | struct packed_git *pack; | |
38 | ||
fff42755 VM |
39 | /* |
40 | * Mark the first `reuse_objects` in the packfile as reused: | |
41 | * they will be sent as-is without using them for repacking | |
42 | * calculations | |
43 | */ | |
44 | uint32_t reuse_objects; | |
45 | ||
46 | /* mmapped buffer of the whole bitmap index */ | |
47 | unsigned char *map; | |
48 | size_t map_size; /* size of the mmaped buffer */ | |
49 | size_t map_pos; /* current position when loading the index */ | |
50 | ||
51 | /* | |
52 | * Type indexes. | |
53 | * | |
54 | * Each bitmap marks which objects in the packfile are of the given | |
55 | * type. This provides type information when yielding the objects from | |
56 | * the packfile during a walk, which allows for better delta bases. | |
57 | */ | |
58 | struct ewah_bitmap *commits; | |
59 | struct ewah_bitmap *trees; | |
60 | struct ewah_bitmap *blobs; | |
61 | struct ewah_bitmap *tags; | |
62 | ||
25143a54 | 63 | /* Map from SHA1 -> `stored_bitmap` for all the bitmapped commits */ |
fff42755 VM |
64 | khash_sha1 *bitmaps; |
65 | ||
66 | /* Number of bitmapped commits */ | |
67 | uint32_t entry_count; | |
68 | ||
f3c23db2 | 69 | /* If not NULL, this is a name-hash cache pointing into map. */ |
ae4f07fb VM |
70 | uint32_t *hashes; |
71 | ||
fff42755 VM |
72 | /* |
73 | * Extended index. | |
74 | * | |
75 | * When trying to perform bitmap operations with objects that are not | |
76 | * packed in `pack`, these objects are added to this "fake index" and | |
77 | * are assumed to appear at the end of the packfile for all operations | |
78 | */ | |
79 | struct eindex { | |
80 | struct object **objects; | |
81 | uint32_t *hashes; | |
82 | uint32_t count, alloc; | |
83 | khash_sha1_pos *positions; | |
84 | } ext_index; | |
85 | ||
86 | /* Bitmap result of the last performed walk */ | |
87 | struct bitmap *result; | |
88 | ||
30cdc33f JK |
89 | /* "have" bitmap from the last performed walk */ |
90 | struct bitmap *haves; | |
91 | ||
fff42755 VM |
92 | /* Version of the bitmap index */ |
93 | unsigned int version; | |
3ae5fa07 | 94 | }; |
fff42755 VM |
95 | |
96 | static struct ewah_bitmap *lookup_stored_bitmap(struct stored_bitmap *st) | |
97 | { | |
98 | struct ewah_bitmap *parent; | |
99 | struct ewah_bitmap *composed; | |
100 | ||
101 | if (st->xor == NULL) | |
102 | return st->root; | |
103 | ||
104 | composed = ewah_pool_new(); | |
105 | parent = lookup_stored_bitmap(st->xor); | |
106 | ewah_xor(st->root, parent, composed); | |
107 | ||
108 | ewah_pool_free(st->root); | |
109 | st->root = composed; | |
110 | st->xor = NULL; | |
111 | ||
112 | return composed; | |
113 | } | |
114 | ||
115 | /* | |
116 | * Read a bitmap from the current read position on the mmaped | |
117 | * index, and increase the read position accordingly | |
118 | */ | |
119 | static struct ewah_bitmap *read_bitmap_1(struct bitmap_index *index) | |
120 | { | |
121 | struct ewah_bitmap *b = ewah_pool_new(); | |
122 | ||
1140bf01 | 123 | ssize_t bitmap_size = ewah_read_mmap(b, |
fff42755 VM |
124 | index->map + index->map_pos, |
125 | index->map_size - index->map_pos); | |
126 | ||
127 | if (bitmap_size < 0) { | |
128 | error("Failed to load bitmap index (corrupted?)"); | |
129 | ewah_pool_free(b); | |
130 | return NULL; | |
131 | } | |
132 | ||
133 | index->map_pos += bitmap_size; | |
134 | return b; | |
135 | } | |
136 | ||
137 | static int load_bitmap_header(struct bitmap_index *index) | |
138 | { | |
139 | struct bitmap_disk_header *header = (void *)index->map; | |
140 | ||
141 | if (index->map_size < sizeof(*header) + 20) | |
142 | return error("Corrupted bitmap index (missing header data)"); | |
143 | ||
144 | if (memcmp(header->magic, BITMAP_IDX_SIGNATURE, sizeof(BITMAP_IDX_SIGNATURE)) != 0) | |
145 | return error("Corrupted bitmap index file (wrong header)"); | |
146 | ||
147 | index->version = ntohs(header->version); | |
148 | if (index->version != 1) | |
149 | return error("Unsupported version for bitmap index file (%d)", index->version); | |
150 | ||
151 | /* Parse known bitmap format options */ | |
152 | { | |
153 | uint32_t flags = ntohs(header->options); | |
154 | ||
155 | if ((flags & BITMAP_OPT_FULL_DAG) == 0) | |
156 | return error("Unsupported options for bitmap index file " | |
157 | "(Git requires BITMAP_OPT_FULL_DAG)"); | |
ae4f07fb VM |
158 | |
159 | if (flags & BITMAP_OPT_HASH_CACHE) { | |
160 | unsigned char *end = index->map + index->map_size - 20; | |
161 | index->hashes = ((uint32_t *)end) - index->pack->num_objects; | |
162 | } | |
fff42755 VM |
163 | } |
164 | ||
165 | index->entry_count = ntohl(header->entry_count); | |
166 | index->map_pos += sizeof(*header); | |
167 | return 0; | |
168 | } | |
169 | ||
170 | static struct stored_bitmap *store_bitmap(struct bitmap_index *index, | |
171 | struct ewah_bitmap *root, | |
172 | const unsigned char *sha1, | |
173 | struct stored_bitmap *xor_with, | |
174 | int flags) | |
175 | { | |
176 | struct stored_bitmap *stored; | |
177 | khiter_t hash_pos; | |
178 | int ret; | |
179 | ||
180 | stored = xmalloc(sizeof(struct stored_bitmap)); | |
181 | stored->root = root; | |
182 | stored->xor = xor_with; | |
183 | stored->flags = flags; | |
184 | hashcpy(stored->sha1, sha1); | |
185 | ||
186 | hash_pos = kh_put_sha1(index->bitmaps, stored->sha1, &ret); | |
187 | ||
188 | /* a 0 return code means the insertion succeeded with no changes, | |
189 | * because the SHA1 already existed on the map. this is bad, there | |
190 | * shouldn't be duplicated commits in the index */ | |
191 | if (ret == 0) { | |
192 | error("Duplicate entry in bitmap index: %s", sha1_to_hex(sha1)); | |
193 | return NULL; | |
194 | } | |
195 | ||
196 | kh_value(index->bitmaps, hash_pos) = stored; | |
197 | return stored; | |
198 | } | |
199 | ||
b5007211 KB |
200 | static inline uint32_t read_be32(const unsigned char *buffer, size_t *pos) |
201 | { | |
202 | uint32_t result = get_be32(buffer + *pos); | |
203 | (*pos) += sizeof(result); | |
204 | return result; | |
205 | } | |
206 | ||
207 | static inline uint8_t read_u8(const unsigned char *buffer, size_t *pos) | |
208 | { | |
209 | return buffer[(*pos)++]; | |
210 | } | |
211 | ||
599dc766 RS |
212 | #define MAX_XOR_OFFSET 160 |
213 | ||
fff42755 VM |
214 | static int load_bitmap_entries_v1(struct bitmap_index *index) |
215 | { | |
fff42755 | 216 | uint32_t i; |
599dc766 | 217 | struct stored_bitmap *recent_bitmaps[MAX_XOR_OFFSET] = { NULL }; |
fff42755 VM |
218 | |
219 | for (i = 0; i < index->entry_count; ++i) { | |
220 | int xor_offset, flags; | |
221 | struct ewah_bitmap *bitmap = NULL; | |
222 | struct stored_bitmap *xor_bitmap = NULL; | |
223 | uint32_t commit_idx_pos; | |
224 | const unsigned char *sha1; | |
225 | ||
b5007211 KB |
226 | commit_idx_pos = read_be32(index->map, &index->map_pos); |
227 | xor_offset = read_u8(index->map, &index->map_pos); | |
228 | flags = read_u8(index->map, &index->map_pos); | |
fff42755 | 229 | |
fff42755 VM |
230 | sha1 = nth_packed_object_sha1(index->pack, commit_idx_pos); |
231 | ||
fff42755 VM |
232 | bitmap = read_bitmap_1(index); |
233 | if (!bitmap) | |
234 | return -1; | |
235 | ||
236 | if (xor_offset > MAX_XOR_OFFSET || xor_offset > i) | |
237 | return error("Corrupted bitmap pack index"); | |
238 | ||
239 | if (xor_offset > 0) { | |
240 | xor_bitmap = recent_bitmaps[(i - xor_offset) % MAX_XOR_OFFSET]; | |
241 | ||
242 | if (xor_bitmap == NULL) | |
243 | return error("Invalid XOR offset in bitmap pack index"); | |
244 | } | |
245 | ||
246 | recent_bitmaps[i % MAX_XOR_OFFSET] = store_bitmap( | |
247 | index, bitmap, sha1, xor_bitmap, flags); | |
248 | } | |
249 | ||
250 | return 0; | |
251 | } | |
252 | ||
cb468050 JH |
253 | static char *pack_bitmap_filename(struct packed_git *p) |
254 | { | |
9ae97018 | 255 | size_t len; |
cb468050 | 256 | |
9ae97018 | 257 | if (!strip_suffix(p->pack_name, ".pack", &len)) |
033abf97 | 258 | BUG("pack_name does not end in .pack"); |
9ae97018 | 259 | return xstrfmt("%.*s.bitmap", (int)len, p->pack_name); |
cb468050 JH |
260 | } |
261 | ||
3ae5fa07 | 262 | static int open_pack_bitmap_1(struct bitmap_index *bitmap_git, struct packed_git *packfile) |
fff42755 VM |
263 | { |
264 | int fd; | |
265 | struct stat st; | |
266 | char *idx_name; | |
267 | ||
268 | if (open_pack_index(packfile)) | |
269 | return -1; | |
270 | ||
271 | idx_name = pack_bitmap_filename(packfile); | |
a5436b57 | 272 | fd = git_open(idx_name); |
fff42755 VM |
273 | free(idx_name); |
274 | ||
275 | if (fd < 0) | |
276 | return -1; | |
277 | ||
278 | if (fstat(fd, &st)) { | |
279 | close(fd); | |
280 | return -1; | |
281 | } | |
282 | ||
3ae5fa07 | 283 | if (bitmap_git->pack) { |
fff42755 VM |
284 | warning("ignoring extra bitmap file: %s", packfile->pack_name); |
285 | close(fd); | |
286 | return -1; | |
287 | } | |
288 | ||
3ae5fa07 JT |
289 | bitmap_git->pack = packfile; |
290 | bitmap_git->map_size = xsize_t(st.st_size); | |
291 | bitmap_git->map = xmmap(NULL, bitmap_git->map_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
292 | bitmap_git->map_pos = 0; | |
fff42755 VM |
293 | close(fd); |
294 | ||
3ae5fa07 JT |
295 | if (load_bitmap_header(bitmap_git) < 0) { |
296 | munmap(bitmap_git->map, bitmap_git->map_size); | |
297 | bitmap_git->map = NULL; | |
298 | bitmap_git->map_size = 0; | |
fff42755 VM |
299 | return -1; |
300 | } | |
301 | ||
302 | return 0; | |
303 | } | |
304 | ||
3ae5fa07 | 305 | static int load_pack_bitmap(struct bitmap_index *bitmap_git) |
fff42755 | 306 | { |
199c86be | 307 | assert(bitmap_git->map); |
fff42755 | 308 | |
3ae5fa07 JT |
309 | bitmap_git->bitmaps = kh_init_sha1(); |
310 | bitmap_git->ext_index.positions = kh_init_sha1_pos(); | |
311 | load_pack_revindex(bitmap_git->pack); | |
fff42755 | 312 | |
3ae5fa07 JT |
313 | if (!(bitmap_git->commits = read_bitmap_1(bitmap_git)) || |
314 | !(bitmap_git->trees = read_bitmap_1(bitmap_git)) || | |
315 | !(bitmap_git->blobs = read_bitmap_1(bitmap_git)) || | |
316 | !(bitmap_git->tags = read_bitmap_1(bitmap_git))) | |
fff42755 VM |
317 | goto failed; |
318 | ||
3ae5fa07 | 319 | if (load_bitmap_entries_v1(bitmap_git) < 0) |
fff42755 VM |
320 | goto failed; |
321 | ||
fff42755 VM |
322 | return 0; |
323 | ||
324 | failed: | |
3ae5fa07 JT |
325 | munmap(bitmap_git->map, bitmap_git->map_size); |
326 | bitmap_git->map = NULL; | |
327 | bitmap_git->map_size = 0; | |
fff42755 VM |
328 | return -1; |
329 | } | |
330 | ||
7c141127 NTND |
331 | static int open_pack_bitmap(struct repository *r, |
332 | struct bitmap_index *bitmap_git) | |
fff42755 VM |
333 | { |
334 | struct packed_git *p; | |
335 | int ret = -1; | |
336 | ||
199c86be | 337 | assert(!bitmap_git->map); |
fff42755 | 338 | |
7c141127 | 339 | for (p = get_all_packs(r); p; p = p->next) { |
3ae5fa07 | 340 | if (open_pack_bitmap_1(bitmap_git, p) == 0) |
fff42755 VM |
341 | ret = 0; |
342 | } | |
343 | ||
344 | return ret; | |
345 | } | |
346 | ||
7c141127 | 347 | struct bitmap_index *prepare_bitmap_git(struct repository *r) |
fff42755 | 348 | { |
3ae5fa07 | 349 | struct bitmap_index *bitmap_git = xcalloc(1, sizeof(*bitmap_git)); |
fff42755 | 350 | |
7c141127 | 351 | if (!open_pack_bitmap(r, bitmap_git) && !load_pack_bitmap(bitmap_git)) |
3ae5fa07 | 352 | return bitmap_git; |
fff42755 | 353 | |
f3c23db2 | 354 | free_bitmap_index(bitmap_git); |
3ae5fa07 | 355 | return NULL; |
fff42755 VM |
356 | } |
357 | ||
358 | struct include_data { | |
3ae5fa07 | 359 | struct bitmap_index *bitmap_git; |
fff42755 VM |
360 | struct bitmap *base; |
361 | struct bitmap *seen; | |
362 | }; | |
363 | ||
3ae5fa07 JT |
364 | static inline int bitmap_position_extended(struct bitmap_index *bitmap_git, |
365 | const unsigned char *sha1) | |
fff42755 | 366 | { |
3ae5fa07 | 367 | khash_sha1_pos *positions = bitmap_git->ext_index.positions; |
fff42755 VM |
368 | khiter_t pos = kh_get_sha1_pos(positions, sha1); |
369 | ||
370 | if (pos < kh_end(positions)) { | |
371 | int bitmap_pos = kh_value(positions, pos); | |
3ae5fa07 | 372 | return bitmap_pos + bitmap_git->pack->num_objects; |
fff42755 VM |
373 | } |
374 | ||
375 | return -1; | |
376 | } | |
377 | ||
3ae5fa07 JT |
378 | static inline int bitmap_position_packfile(struct bitmap_index *bitmap_git, |
379 | const unsigned char *sha1) | |
fff42755 | 380 | { |
3ae5fa07 | 381 | off_t offset = find_pack_entry_one(sha1, bitmap_git->pack); |
fff42755 VM |
382 | if (!offset) |
383 | return -1; | |
384 | ||
3ae5fa07 | 385 | return find_revindex_position(bitmap_git->pack, offset); |
fff42755 VM |
386 | } |
387 | ||
3ae5fa07 JT |
388 | static int bitmap_position(struct bitmap_index *bitmap_git, |
389 | const unsigned char *sha1) | |
fff42755 | 390 | { |
3ae5fa07 JT |
391 | int pos = bitmap_position_packfile(bitmap_git, sha1); |
392 | return (pos >= 0) ? pos : bitmap_position_extended(bitmap_git, sha1); | |
fff42755 VM |
393 | } |
394 | ||
3ae5fa07 JT |
395 | static int ext_index_add_object(struct bitmap_index *bitmap_git, |
396 | struct object *object, const char *name) | |
fff42755 | 397 | { |
3ae5fa07 | 398 | struct eindex *eindex = &bitmap_git->ext_index; |
fff42755 VM |
399 | |
400 | khiter_t hash_pos; | |
401 | int hash_ret; | |
402 | int bitmap_pos; | |
403 | ||
ed1c9977 | 404 | hash_pos = kh_put_sha1_pos(eindex->positions, object->oid.hash, &hash_ret); |
fff42755 VM |
405 | if (hash_ret > 0) { |
406 | if (eindex->count >= eindex->alloc) { | |
407 | eindex->alloc = (eindex->alloc + 16) * 3 / 2; | |
2756ca43 RS |
408 | REALLOC_ARRAY(eindex->objects, eindex->alloc); |
409 | REALLOC_ARRAY(eindex->hashes, eindex->alloc); | |
fff42755 VM |
410 | } |
411 | ||
412 | bitmap_pos = eindex->count; | |
413 | eindex->objects[eindex->count] = object; | |
414 | eindex->hashes[eindex->count] = pack_name_hash(name); | |
415 | kh_value(eindex->positions, hash_pos) = bitmap_pos; | |
416 | eindex->count++; | |
417 | } else { | |
418 | bitmap_pos = kh_value(eindex->positions, hash_pos); | |
419 | } | |
420 | ||
3ae5fa07 | 421 | return bitmap_pos + bitmap_git->pack->num_objects; |
fff42755 VM |
422 | } |
423 | ||
3ae5fa07 JT |
424 | struct bitmap_show_data { |
425 | struct bitmap_index *bitmap_git; | |
426 | struct bitmap *base; | |
427 | }; | |
428 | ||
429 | static void show_object(struct object *object, const char *name, void *data_) | |
fff42755 | 430 | { |
3ae5fa07 | 431 | struct bitmap_show_data *data = data_; |
fff42755 VM |
432 | int bitmap_pos; |
433 | ||
3ae5fa07 | 434 | bitmap_pos = bitmap_position(data->bitmap_git, object->oid.hash); |
fff42755 | 435 | |
de1e67d0 | 436 | if (bitmap_pos < 0) |
3ae5fa07 JT |
437 | bitmap_pos = ext_index_add_object(data->bitmap_git, object, |
438 | name); | |
fff42755 | 439 | |
3ae5fa07 | 440 | bitmap_set(data->base, bitmap_pos); |
fff42755 VM |
441 | } |
442 | ||
443 | static void show_commit(struct commit *commit, void *data) | |
444 | { | |
445 | } | |
446 | ||
3ae5fa07 JT |
447 | static int add_to_include_set(struct bitmap_index *bitmap_git, |
448 | struct include_data *data, | |
fff42755 VM |
449 | const unsigned char *sha1, |
450 | int bitmap_pos) | |
451 | { | |
452 | khiter_t hash_pos; | |
453 | ||
454 | if (data->seen && bitmap_get(data->seen, bitmap_pos)) | |
455 | return 0; | |
456 | ||
457 | if (bitmap_get(data->base, bitmap_pos)) | |
458 | return 0; | |
459 | ||
3ae5fa07 JT |
460 | hash_pos = kh_get_sha1(bitmap_git->bitmaps, sha1); |
461 | if (hash_pos < kh_end(bitmap_git->bitmaps)) { | |
462 | struct stored_bitmap *st = kh_value(bitmap_git->bitmaps, hash_pos); | |
fff42755 VM |
463 | bitmap_or_ewah(data->base, lookup_stored_bitmap(st)); |
464 | return 0; | |
465 | } | |
466 | ||
467 | bitmap_set(data->base, bitmap_pos); | |
468 | return 1; | |
469 | } | |
470 | ||
471 | static int should_include(struct commit *commit, void *_data) | |
472 | { | |
473 | struct include_data *data = _data; | |
474 | int bitmap_pos; | |
475 | ||
3ae5fa07 | 476 | bitmap_pos = bitmap_position(data->bitmap_git, commit->object.oid.hash); |
fff42755 | 477 | if (bitmap_pos < 0) |
3ae5fa07 JT |
478 | bitmap_pos = ext_index_add_object(data->bitmap_git, |
479 | (struct object *)commit, | |
480 | NULL); | |
fff42755 | 481 | |
3ae5fa07 JT |
482 | if (!add_to_include_set(data->bitmap_git, data, commit->object.oid.hash, |
483 | bitmap_pos)) { | |
fff42755 VM |
484 | struct commit_list *parent = commit->parents; |
485 | ||
486 | while (parent) { | |
487 | parent->item->object.flags |= SEEN; | |
488 | parent = parent->next; | |
489 | } | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | return 1; | |
495 | } | |
496 | ||
3ae5fa07 JT |
497 | static struct bitmap *find_objects(struct bitmap_index *bitmap_git, |
498 | struct rev_info *revs, | |
fff42755 VM |
499 | struct object_list *roots, |
500 | struct bitmap *seen) | |
501 | { | |
502 | struct bitmap *base = NULL; | |
503 | int needs_walk = 0; | |
504 | ||
505 | struct object_list *not_mapped = NULL; | |
506 | ||
507 | /* | |
508 | * Go through all the roots for the walk. The ones that have bitmaps | |
509 | * on the bitmap index will be `or`ed together to form an initial | |
510 | * global reachability analysis. | |
511 | * | |
512 | * The ones without bitmaps in the index will be stored in the | |
513 | * `not_mapped_list` for further processing. | |
514 | */ | |
515 | while (roots) { | |
516 | struct object *object = roots->item; | |
517 | roots = roots->next; | |
518 | ||
519 | if (object->type == OBJ_COMMIT) { | |
3ae5fa07 | 520 | khiter_t pos = kh_get_sha1(bitmap_git->bitmaps, object->oid.hash); |
fff42755 | 521 | |
3ae5fa07 JT |
522 | if (pos < kh_end(bitmap_git->bitmaps)) { |
523 | struct stored_bitmap *st = kh_value(bitmap_git->bitmaps, pos); | |
fff42755 VM |
524 | struct ewah_bitmap *or_with = lookup_stored_bitmap(st); |
525 | ||
526 | if (base == NULL) | |
527 | base = ewah_to_bitmap(or_with); | |
528 | else | |
529 | bitmap_or_ewah(base, or_with); | |
530 | ||
531 | object->flags |= SEEN; | |
532 | continue; | |
533 | } | |
534 | } | |
535 | ||
536 | object_list_insert(object, ¬_mapped); | |
537 | } | |
538 | ||
539 | /* | |
540 | * Best case scenario: We found bitmaps for all the roots, | |
541 | * so the resulting `or` bitmap has the full reachability analysis | |
542 | */ | |
543 | if (not_mapped == NULL) | |
544 | return base; | |
545 | ||
546 | roots = not_mapped; | |
547 | ||
548 | /* | |
549 | * Let's iterate through all the roots that don't have bitmaps to | |
550 | * check if we can determine them to be reachable from the existing | |
551 | * global bitmap. | |
552 | * | |
553 | * If we cannot find them in the existing global bitmap, we'll need | |
554 | * to push them to an actual walk and run it until we can confirm | |
555 | * they are reachable | |
556 | */ | |
557 | while (roots) { | |
558 | struct object *object = roots->item; | |
559 | int pos; | |
560 | ||
561 | roots = roots->next; | |
3ae5fa07 | 562 | pos = bitmap_position(bitmap_git, object->oid.hash); |
fff42755 VM |
563 | |
564 | if (pos < 0 || base == NULL || !bitmap_get(base, pos)) { | |
565 | object->flags &= ~UNINTERESTING; | |
566 | add_pending_object(revs, object, ""); | |
567 | needs_walk = 1; | |
568 | } else { | |
569 | object->flags |= SEEN; | |
570 | } | |
571 | } | |
572 | ||
573 | if (needs_walk) { | |
574 | struct include_data incdata; | |
3ae5fa07 | 575 | struct bitmap_show_data show_data; |
fff42755 VM |
576 | |
577 | if (base == NULL) | |
578 | base = bitmap_new(); | |
579 | ||
3ae5fa07 | 580 | incdata.bitmap_git = bitmap_git; |
fff42755 VM |
581 | incdata.base = base; |
582 | incdata.seen = seen; | |
583 | ||
584 | revs->include_check = should_include; | |
585 | revs->include_check_data = &incdata; | |
586 | ||
587 | if (prepare_revision_walk(revs)) | |
588 | die("revision walk setup failed"); | |
589 | ||
3ae5fa07 JT |
590 | show_data.bitmap_git = bitmap_git; |
591 | show_data.base = base; | |
592 | ||
593 | traverse_commit_list(revs, show_commit, show_object, | |
594 | &show_data); | |
fff42755 VM |
595 | } |
596 | ||
597 | return base; | |
598 | } | |
599 | ||
3ae5fa07 | 600 | static void show_extended_objects(struct bitmap_index *bitmap_git, |
fff42755 VM |
601 | show_reachable_fn show_reach) |
602 | { | |
3ae5fa07 JT |
603 | struct bitmap *objects = bitmap_git->result; |
604 | struct eindex *eindex = &bitmap_git->ext_index; | |
fff42755 VM |
605 | uint32_t i; |
606 | ||
607 | for (i = 0; i < eindex->count; ++i) { | |
608 | struct object *obj; | |
609 | ||
3ae5fa07 | 610 | if (!bitmap_get(objects, bitmap_git->pack->num_objects + i)) |
fff42755 VM |
611 | continue; |
612 | ||
613 | obj = eindex->objects[i]; | |
20664967 | 614 | show_reach(&obj->oid, obj->type, 0, eindex->hashes[i], NULL, 0); |
fff42755 VM |
615 | } |
616 | } | |
617 | ||
618 | static void show_objects_for_type( | |
3ae5fa07 | 619 | struct bitmap_index *bitmap_git, |
fff42755 VM |
620 | struct ewah_bitmap *type_filter, |
621 | enum object_type object_type, | |
622 | show_reachable_fn show_reach) | |
623 | { | |
624 | size_t pos = 0, i = 0; | |
625 | uint32_t offset; | |
626 | ||
627 | struct ewah_iterator it; | |
628 | eword_t filter; | |
629 | ||
3ae5fa07 JT |
630 | struct bitmap *objects = bitmap_git->result; |
631 | ||
632 | if (bitmap_git->reuse_objects == bitmap_git->pack->num_objects) | |
fff42755 VM |
633 | return; |
634 | ||
635 | ewah_iterator_init(&it, type_filter); | |
636 | ||
637 | while (i < objects->word_alloc && ewah_iterator_next(&filter, &it)) { | |
638 | eword_t word = objects->words[i] & filter; | |
639 | ||
34b935c0 | 640 | for (offset = 0; offset < BITS_IN_EWORD; ++offset) { |
20664967 | 641 | struct object_id oid; |
fff42755 VM |
642 | struct revindex_entry *entry; |
643 | uint32_t hash = 0; | |
644 | ||
645 | if ((word >> offset) == 0) | |
646 | break; | |
647 | ||
648 | offset += ewah_bit_ctz64(word >> offset); | |
649 | ||
3ae5fa07 | 650 | if (pos + offset < bitmap_git->reuse_objects) |
fff42755 VM |
651 | continue; |
652 | ||
3ae5fa07 JT |
653 | entry = &bitmap_git->pack->revindex[pos + offset]; |
654 | nth_packed_object_oid(&oid, bitmap_git->pack, entry->nr); | |
fff42755 | 655 | |
3ae5fa07 JT |
656 | if (bitmap_git->hashes) |
657 | hash = get_be32(bitmap_git->hashes + entry->nr); | |
ae4f07fb | 658 | |
3ae5fa07 | 659 | show_reach(&oid, object_type, 0, hash, bitmap_git->pack, entry->offset); |
fff42755 VM |
660 | } |
661 | ||
34b935c0 | 662 | pos += BITS_IN_EWORD; |
fff42755 VM |
663 | i++; |
664 | } | |
665 | } | |
666 | ||
3ae5fa07 JT |
667 | static int in_bitmapped_pack(struct bitmap_index *bitmap_git, |
668 | struct object_list *roots) | |
fff42755 VM |
669 | { |
670 | while (roots) { | |
671 | struct object *object = roots->item; | |
672 | roots = roots->next; | |
673 | ||
3ae5fa07 | 674 | if (find_pack_entry_one(object->oid.hash, bitmap_git->pack) > 0) |
fff42755 VM |
675 | return 1; |
676 | } | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
3ae5fa07 | 681 | struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs) |
fff42755 VM |
682 | { |
683 | unsigned int i; | |
fff42755 VM |
684 | |
685 | struct object_list *wants = NULL; | |
686 | struct object_list *haves = NULL; | |
687 | ||
688 | struct bitmap *wants_bitmap = NULL; | |
689 | struct bitmap *haves_bitmap = NULL; | |
690 | ||
3ae5fa07 JT |
691 | struct bitmap_index *bitmap_git = xcalloc(1, sizeof(*bitmap_git)); |
692 | /* try to open a bitmapped pack, but don't parse it yet | |
693 | * because we may not need to use it */ | |
7c141127 | 694 | if (open_pack_bitmap(revs->repo, bitmap_git) < 0) |
f3c23db2 | 695 | goto cleanup; |
fff42755 | 696 | |
4d01a7fa MÅ |
697 | for (i = 0; i < revs->pending.nr; ++i) { |
698 | struct object *object = revs->pending.objects[i].item; | |
fff42755 VM |
699 | |
700 | if (object->type == OBJ_NONE) | |
c251c83d | 701 | parse_object_or_die(&object->oid, NULL); |
fff42755 VM |
702 | |
703 | while (object->type == OBJ_TAG) { | |
704 | struct tag *tag = (struct tag *) object; | |
705 | ||
706 | if (object->flags & UNINTERESTING) | |
707 | object_list_insert(object, &haves); | |
708 | else | |
709 | object_list_insert(object, &wants); | |
710 | ||
711 | if (!tag->tagged) | |
712 | die("bad tag"); | |
c251c83d | 713 | object = parse_object_or_die(&tag->tagged->oid, NULL); |
fff42755 VM |
714 | } |
715 | ||
716 | if (object->flags & UNINTERESTING) | |
717 | object_list_insert(object, &haves); | |
718 | else | |
719 | object_list_insert(object, &wants); | |
720 | } | |
721 | ||
722 | /* | |
723 | * if we have a HAVES list, but none of those haves is contained | |
724 | * in the packfile that has a bitmap, we don't have anything to | |
725 | * optimize here | |
726 | */ | |
3ae5fa07 | 727 | if (haves && !in_bitmapped_pack(bitmap_git, haves)) |
f3c23db2 | 728 | goto cleanup; |
fff42755 VM |
729 | |
730 | /* if we don't want anything, we're done here */ | |
731 | if (!wants) | |
f3c23db2 | 732 | goto cleanup; |
fff42755 VM |
733 | |
734 | /* | |
735 | * now we're going to use bitmaps, so load the actual bitmap entries | |
736 | * from disk. this is the point of no return; after this the rev_list | |
737 | * becomes invalidated and we must perform the revwalk through bitmaps | |
738 | */ | |
199c86be | 739 | if (load_pack_bitmap(bitmap_git) < 0) |
f3c23db2 | 740 | goto cleanup; |
fff42755 | 741 | |
4d01a7fa | 742 | object_array_clear(&revs->pending); |
fff42755 VM |
743 | |
744 | if (haves) { | |
2db1a43f | 745 | revs->ignore_missing_links = 1; |
3ae5fa07 | 746 | haves_bitmap = find_objects(bitmap_git, revs, haves, NULL); |
fff42755 | 747 | reset_revision_walk(); |
2db1a43f | 748 | revs->ignore_missing_links = 0; |
fff42755 VM |
749 | |
750 | if (haves_bitmap == NULL) | |
033abf97 | 751 | BUG("failed to perform bitmap walk"); |
fff42755 VM |
752 | } |
753 | ||
3ae5fa07 | 754 | wants_bitmap = find_objects(bitmap_git, revs, wants, haves_bitmap); |
fff42755 VM |
755 | |
756 | if (!wants_bitmap) | |
033abf97 | 757 | BUG("failed to perform bitmap walk"); |
fff42755 VM |
758 | |
759 | if (haves_bitmap) | |
760 | bitmap_and_not(wants_bitmap, haves_bitmap); | |
761 | ||
3ae5fa07 | 762 | bitmap_git->result = wants_bitmap; |
30cdc33f | 763 | bitmap_git->haves = haves_bitmap; |
fff42755 | 764 | |
3ae5fa07 | 765 | return bitmap_git; |
f3c23db2 JT |
766 | |
767 | cleanup: | |
768 | free_bitmap_index(bitmap_git); | |
769 | return NULL; | |
fff42755 VM |
770 | } |
771 | ||
3ae5fa07 JT |
772 | int reuse_partial_packfile_from_bitmap(struct bitmap_index *bitmap_git, |
773 | struct packed_git **packfile, | |
fff42755 VM |
774 | uint32_t *entries, |
775 | off_t *up_to) | |
776 | { | |
777 | /* | |
778 | * Reuse the packfile content if we need more than | |
779 | * 90% of its objects | |
780 | */ | |
781 | static const double REUSE_PERCENT = 0.9; | |
782 | ||
3ae5fa07 | 783 | struct bitmap *result = bitmap_git->result; |
fff42755 VM |
784 | uint32_t reuse_threshold; |
785 | uint32_t i, reuse_objects = 0; | |
786 | ||
787 | assert(result); | |
788 | ||
789 | for (i = 0; i < result->word_alloc; ++i) { | |
790 | if (result->words[i] != (eword_t)~0) { | |
791 | reuse_objects += ewah_bit_ctz64(~result->words[i]); | |
792 | break; | |
793 | } | |
794 | ||
34b935c0 | 795 | reuse_objects += BITS_IN_EWORD; |
fff42755 VM |
796 | } |
797 | ||
798 | #ifdef GIT_BITMAP_DEBUG | |
799 | { | |
800 | const unsigned char *sha1; | |
801 | struct revindex_entry *entry; | |
802 | ||
3ae5fa07 JT |
803 | entry = &bitmap_git->reverse_index->revindex[reuse_objects]; |
804 | sha1 = nth_packed_object_sha1(bitmap_git->pack, entry->nr); | |
fff42755 VM |
805 | |
806 | fprintf(stderr, "Failed to reuse at %d (%016llx)\n", | |
807 | reuse_objects, result->words[i]); | |
808 | fprintf(stderr, " %s\n", sha1_to_hex(sha1)); | |
809 | } | |
810 | #endif | |
811 | ||
812 | if (!reuse_objects) | |
813 | return -1; | |
814 | ||
3ae5fa07 JT |
815 | if (reuse_objects >= bitmap_git->pack->num_objects) { |
816 | bitmap_git->reuse_objects = *entries = bitmap_git->pack->num_objects; | |
fff42755 | 817 | *up_to = -1; /* reuse the full pack */ |
3ae5fa07 | 818 | *packfile = bitmap_git->pack; |
fff42755 VM |
819 | return 0; |
820 | } | |
821 | ||
3ae5fa07 | 822 | reuse_threshold = bitmap_popcount(bitmap_git->result) * REUSE_PERCENT; |
fff42755 VM |
823 | |
824 | if (reuse_objects < reuse_threshold) | |
825 | return -1; | |
826 | ||
3ae5fa07 JT |
827 | bitmap_git->reuse_objects = *entries = reuse_objects; |
828 | *up_to = bitmap_git->pack->revindex[reuse_objects].offset; | |
829 | *packfile = bitmap_git->pack; | |
fff42755 VM |
830 | |
831 | return 0; | |
832 | } | |
833 | ||
3ae5fa07 JT |
834 | void traverse_bitmap_commit_list(struct bitmap_index *bitmap_git, |
835 | show_reachable_fn show_reachable) | |
fff42755 | 836 | { |
3ae5fa07 | 837 | assert(bitmap_git->result); |
fff42755 | 838 | |
3ae5fa07 | 839 | show_objects_for_type(bitmap_git, bitmap_git->commits, |
fff42755 | 840 | OBJ_COMMIT, show_reachable); |
3ae5fa07 | 841 | show_objects_for_type(bitmap_git, bitmap_git->trees, |
fff42755 | 842 | OBJ_TREE, show_reachable); |
3ae5fa07 | 843 | show_objects_for_type(bitmap_git, bitmap_git->blobs, |
fff42755 | 844 | OBJ_BLOB, show_reachable); |
3ae5fa07 | 845 | show_objects_for_type(bitmap_git, bitmap_git->tags, |
fff42755 VM |
846 | OBJ_TAG, show_reachable); |
847 | ||
3ae5fa07 | 848 | show_extended_objects(bitmap_git, show_reachable); |
fff42755 VM |
849 | } |
850 | ||
3ae5fa07 | 851 | static uint32_t count_object_type(struct bitmap_index *bitmap_git, |
fff42755 VM |
852 | enum object_type type) |
853 | { | |
3ae5fa07 JT |
854 | struct bitmap *objects = bitmap_git->result; |
855 | struct eindex *eindex = &bitmap_git->ext_index; | |
fff42755 VM |
856 | |
857 | uint32_t i = 0, count = 0; | |
858 | struct ewah_iterator it; | |
859 | eword_t filter; | |
860 | ||
861 | switch (type) { | |
862 | case OBJ_COMMIT: | |
3ae5fa07 | 863 | ewah_iterator_init(&it, bitmap_git->commits); |
fff42755 VM |
864 | break; |
865 | ||
866 | case OBJ_TREE: | |
3ae5fa07 | 867 | ewah_iterator_init(&it, bitmap_git->trees); |
fff42755 VM |
868 | break; |
869 | ||
870 | case OBJ_BLOB: | |
3ae5fa07 | 871 | ewah_iterator_init(&it, bitmap_git->blobs); |
fff42755 VM |
872 | break; |
873 | ||
874 | case OBJ_TAG: | |
3ae5fa07 | 875 | ewah_iterator_init(&it, bitmap_git->tags); |
fff42755 VM |
876 | break; |
877 | ||
878 | default: | |
879 | return 0; | |
880 | } | |
881 | ||
882 | while (i < objects->word_alloc && ewah_iterator_next(&filter, &it)) { | |
883 | eword_t word = objects->words[i++] & filter; | |
884 | count += ewah_bit_popcount64(word); | |
885 | } | |
886 | ||
887 | for (i = 0; i < eindex->count; ++i) { | |
888 | if (eindex->objects[i]->type == type && | |
3ae5fa07 | 889 | bitmap_get(objects, bitmap_git->pack->num_objects + i)) |
fff42755 VM |
890 | count++; |
891 | } | |
892 | ||
893 | return count; | |
894 | } | |
895 | ||
3ae5fa07 JT |
896 | void count_bitmap_commit_list(struct bitmap_index *bitmap_git, |
897 | uint32_t *commits, uint32_t *trees, | |
fff42755 VM |
898 | uint32_t *blobs, uint32_t *tags) |
899 | { | |
3ae5fa07 | 900 | assert(bitmap_git->result); |
fff42755 VM |
901 | |
902 | if (commits) | |
3ae5fa07 | 903 | *commits = count_object_type(bitmap_git, OBJ_COMMIT); |
fff42755 VM |
904 | |
905 | if (trees) | |
3ae5fa07 | 906 | *trees = count_object_type(bitmap_git, OBJ_TREE); |
fff42755 VM |
907 | |
908 | if (blobs) | |
3ae5fa07 | 909 | *blobs = count_object_type(bitmap_git, OBJ_BLOB); |
fff42755 VM |
910 | |
911 | if (tags) | |
3ae5fa07 | 912 | *tags = count_object_type(bitmap_git, OBJ_TAG); |
fff42755 VM |
913 | } |
914 | ||
915 | struct bitmap_test_data { | |
3ae5fa07 | 916 | struct bitmap_index *bitmap_git; |
fff42755 VM |
917 | struct bitmap *base; |
918 | struct progress *prg; | |
919 | size_t seen; | |
920 | }; | |
921 | ||
de1e67d0 JK |
922 | static void test_show_object(struct object *object, const char *name, |
923 | void *data) | |
fff42755 VM |
924 | { |
925 | struct bitmap_test_data *tdata = data; | |
926 | int bitmap_pos; | |
927 | ||
3ae5fa07 | 928 | bitmap_pos = bitmap_position(tdata->bitmap_git, object->oid.hash); |
fff42755 | 929 | if (bitmap_pos < 0) |
f2fd0760 | 930 | die("Object not in bitmap: %s\n", oid_to_hex(&object->oid)); |
fff42755 VM |
931 | |
932 | bitmap_set(tdata->base, bitmap_pos); | |
933 | display_progress(tdata->prg, ++tdata->seen); | |
934 | } | |
935 | ||
936 | static void test_show_commit(struct commit *commit, void *data) | |
937 | { | |
938 | struct bitmap_test_data *tdata = data; | |
939 | int bitmap_pos; | |
940 | ||
3ae5fa07 JT |
941 | bitmap_pos = bitmap_position(tdata->bitmap_git, |
942 | commit->object.oid.hash); | |
fff42755 | 943 | if (bitmap_pos < 0) |
f2fd0760 | 944 | die("Object not in bitmap: %s\n", oid_to_hex(&commit->object.oid)); |
fff42755 VM |
945 | |
946 | bitmap_set(tdata->base, bitmap_pos); | |
947 | display_progress(tdata->prg, ++tdata->seen); | |
948 | } | |
949 | ||
950 | void test_bitmap_walk(struct rev_info *revs) | |
951 | { | |
952 | struct object *root; | |
953 | struct bitmap *result = NULL; | |
954 | khiter_t pos; | |
955 | size_t result_popcnt; | |
956 | struct bitmap_test_data tdata; | |
3ae5fa07 | 957 | struct bitmap_index *bitmap_git; |
fff42755 | 958 | |
7c141127 | 959 | if (!(bitmap_git = prepare_bitmap_git(revs->repo))) |
fff42755 VM |
960 | die("failed to load bitmap indexes"); |
961 | ||
962 | if (revs->pending.nr != 1) | |
963 | die("you must specify exactly one commit to test"); | |
964 | ||
965 | fprintf(stderr, "Bitmap v%d test (%d entries loaded)\n", | |
3ae5fa07 | 966 | bitmap_git->version, bitmap_git->entry_count); |
fff42755 VM |
967 | |
968 | root = revs->pending.objects[0].item; | |
3ae5fa07 | 969 | pos = kh_get_sha1(bitmap_git->bitmaps, root->oid.hash); |
fff42755 | 970 | |
3ae5fa07 JT |
971 | if (pos < kh_end(bitmap_git->bitmaps)) { |
972 | struct stored_bitmap *st = kh_value(bitmap_git->bitmaps, pos); | |
fff42755 VM |
973 | struct ewah_bitmap *bm = lookup_stored_bitmap(st); |
974 | ||
975 | fprintf(stderr, "Found bitmap for %s. %d bits / %08x checksum\n", | |
f2fd0760 | 976 | oid_to_hex(&root->oid), (int)bm->bit_size, ewah_checksum(bm)); |
fff42755 VM |
977 | |
978 | result = ewah_to_bitmap(bm); | |
979 | } | |
980 | ||
981 | if (result == NULL) | |
f2fd0760 | 982 | die("Commit %s doesn't have an indexed bitmap", oid_to_hex(&root->oid)); |
fff42755 VM |
983 | |
984 | revs->tag_objects = 1; | |
985 | revs->tree_objects = 1; | |
986 | revs->blob_objects = 1; | |
987 | ||
988 | result_popcnt = bitmap_popcount(result); | |
989 | ||
990 | if (prepare_revision_walk(revs)) | |
991 | die("revision walk setup failed"); | |
992 | ||
3ae5fa07 | 993 | tdata.bitmap_git = bitmap_git; |
fff42755 VM |
994 | tdata.base = bitmap_new(); |
995 | tdata.prg = start_progress("Verifying bitmap entries", result_popcnt); | |
996 | tdata.seen = 0; | |
997 | ||
998 | traverse_commit_list(revs, &test_show_commit, &test_show_object, &tdata); | |
999 | ||
1000 | stop_progress(&tdata.prg); | |
1001 | ||
1002 | if (bitmap_equals(result, tdata.base)) | |
1003 | fprintf(stderr, "OK!\n"); | |
1004 | else | |
1005 | fprintf(stderr, "Mismatch!\n"); | |
f86a3747 | 1006 | |
f3c23db2 | 1007 | free_bitmap_index(bitmap_git); |
fff42755 | 1008 | } |
7cc8f971 VM |
1009 | |
1010 | static int rebuild_bitmap(uint32_t *reposition, | |
1011 | struct ewah_bitmap *source, | |
1012 | struct bitmap *dest) | |
1013 | { | |
1014 | uint32_t pos = 0; | |
1015 | struct ewah_iterator it; | |
1016 | eword_t word; | |
1017 | ||
1018 | ewah_iterator_init(&it, source); | |
1019 | ||
1020 | while (ewah_iterator_next(&word, &it)) { | |
1021 | uint32_t offset, bit_pos; | |
1022 | ||
34b935c0 | 1023 | for (offset = 0; offset < BITS_IN_EWORD; ++offset) { |
7cc8f971 VM |
1024 | if ((word >> offset) == 0) |
1025 | break; | |
1026 | ||
1027 | offset += ewah_bit_ctz64(word >> offset); | |
1028 | ||
1029 | bit_pos = reposition[pos + offset]; | |
1030 | if (bit_pos > 0) | |
1031 | bitmap_set(dest, bit_pos - 1); | |
1032 | else /* can't reuse, we don't have the object */ | |
1033 | return -1; | |
1034 | } | |
1035 | ||
34b935c0 | 1036 | pos += BITS_IN_EWORD; |
7cc8f971 VM |
1037 | } |
1038 | return 0; | |
1039 | } | |
1040 | ||
3ae5fa07 JT |
1041 | int rebuild_existing_bitmaps(struct bitmap_index *bitmap_git, |
1042 | struct packing_data *mapping, | |
7cc8f971 VM |
1043 | khash_sha1 *reused_bitmaps, |
1044 | int show_progress) | |
1045 | { | |
1046 | uint32_t i, num_objects; | |
1047 | uint32_t *reposition; | |
1048 | struct bitmap *rebuild; | |
1049 | struct stored_bitmap *stored; | |
1050 | struct progress *progress = NULL; | |
1051 | ||
1052 | khiter_t hash_pos; | |
1053 | int hash_ret; | |
1054 | ||
3ae5fa07 | 1055 | num_objects = bitmap_git->pack->num_objects; |
7cc8f971 VM |
1056 | reposition = xcalloc(num_objects, sizeof(uint32_t)); |
1057 | ||
1058 | for (i = 0; i < num_objects; ++i) { | |
1059 | const unsigned char *sha1; | |
1060 | struct revindex_entry *entry; | |
1061 | struct object_entry *oe; | |
1062 | ||
3ae5fa07 JT |
1063 | entry = &bitmap_git->pack->revindex[i]; |
1064 | sha1 = nth_packed_object_sha1(bitmap_git->pack, entry->nr); | |
7cc8f971 VM |
1065 | oe = packlist_find(mapping, sha1, NULL); |
1066 | ||
1067 | if (oe) | |
06af3bba | 1068 | reposition[i] = oe_in_pack_pos(mapping, oe) + 1; |
7cc8f971 VM |
1069 | } |
1070 | ||
1071 | rebuild = bitmap_new(); | |
1072 | i = 0; | |
1073 | ||
1074 | if (show_progress) | |
1075 | progress = start_progress("Reusing bitmaps", 0); | |
1076 | ||
3ae5fa07 | 1077 | kh_foreach_value(bitmap_git->bitmaps, stored, { |
7cc8f971 VM |
1078 | if (stored->flags & BITMAP_FLAG_REUSE) { |
1079 | if (!rebuild_bitmap(reposition, | |
1080 | lookup_stored_bitmap(stored), | |
1081 | rebuild)) { | |
1082 | hash_pos = kh_put_sha1(reused_bitmaps, | |
1083 | stored->sha1, | |
1084 | &hash_ret); | |
1085 | kh_value(reused_bitmaps, hash_pos) = | |
1086 | bitmap_to_ewah(rebuild); | |
1087 | } | |
1088 | bitmap_reset(rebuild); | |
1089 | display_progress(progress, ++i); | |
1090 | } | |
1091 | }); | |
1092 | ||
1093 | stop_progress(&progress); | |
1094 | ||
1095 | free(reposition); | |
1096 | bitmap_free(rebuild); | |
1097 | return 0; | |
1098 | } | |
f3c23db2 JT |
1099 | |
1100 | void free_bitmap_index(struct bitmap_index *b) | |
1101 | { | |
1102 | if (!b) | |
1103 | return; | |
1104 | ||
1105 | if (b->map) | |
1106 | munmap(b->map, b->map_size); | |
1107 | ewah_pool_free(b->commits); | |
1108 | ewah_pool_free(b->trees); | |
1109 | ewah_pool_free(b->blobs); | |
1110 | ewah_pool_free(b->tags); | |
1111 | kh_destroy_sha1(b->bitmaps); | |
1112 | free(b->ext_index.objects); | |
1113 | free(b->ext_index.hashes); | |
1114 | bitmap_free(b->result); | |
30cdc33f | 1115 | bitmap_free(b->haves); |
f3c23db2 JT |
1116 | free(b); |
1117 | } | |
30cdc33f JK |
1118 | |
1119 | int bitmap_has_sha1_in_uninteresting(struct bitmap_index *bitmap_git, | |
1120 | const unsigned char *sha1) | |
1121 | { | |
1122 | int pos; | |
1123 | ||
1124 | if (!bitmap_git) | |
1125 | return 0; /* no bitmap loaded */ | |
30cdc33f JK |
1126 | if (!bitmap_git->haves) |
1127 | return 0; /* walk had no "haves" */ | |
1128 | ||
1129 | pos = bitmap_position_packfile(bitmap_git, sha1); | |
1130 | if (pos < 0) | |
1131 | return 0; | |
1132 | ||
1133 | return bitmap_get(bitmap_git->haves, pos); | |
1134 | } |