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Commit | Line | Data |
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a3407730 | 1 | #include "cache.h" |
c4d25228 | 2 | #include "config.h" |
fc59e748 | 3 | #include "csum-file.h" |
396f2570 | 4 | #include "dir.h" |
fc59e748 | 5 | #include "lockfile.h" |
396f2570 | 6 | #include "packfile.h" |
4d80560c | 7 | #include "object-store.h" |
3715a633 | 8 | #include "sha1-lookup.h" |
a3407730 | 9 | #include "midx.h" |
144d7033 | 10 | #include "progress.h" |
d829223a | 11 | #include "trace2.h" |
a3407730 | 12 | |
fc59e748 DS |
13 | #define MIDX_SIGNATURE 0x4d494458 /* "MIDX" */ |
14 | #define MIDX_VERSION 1 | |
4d80560c DS |
15 | #define MIDX_BYTE_FILE_VERSION 4 |
16 | #define MIDX_BYTE_HASH_VERSION 5 | |
17 | #define MIDX_BYTE_NUM_CHUNKS 6 | |
18 | #define MIDX_BYTE_NUM_PACKS 8 | |
fc59e748 DS |
19 | #define MIDX_HASH_VERSION 1 |
20 | #define MIDX_HEADER_SIZE 12 | |
4d80560c DS |
21 | #define MIDX_HASH_LEN 20 |
22 | #define MIDX_MIN_SIZE (MIDX_HEADER_SIZE + MIDX_HASH_LEN) | |
fc59e748 | 23 | |
662148c4 | 24 | #define MIDX_MAX_CHUNKS 5 |
32f3c541 DS |
25 | #define MIDX_CHUNK_ALIGNMENT 4 |
26 | #define MIDX_CHUNKID_PACKNAMES 0x504e414d /* "PNAM" */ | |
d7cacf29 | 27 | #define MIDX_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */ |
0d5b3a5e | 28 | #define MIDX_CHUNKID_OIDLOOKUP 0x4f49444c /* "OIDL" */ |
662148c4 DS |
29 | #define MIDX_CHUNKID_OBJECTOFFSETS 0x4f4f4646 /* "OOFF" */ |
30 | #define MIDX_CHUNKID_LARGEOFFSETS 0x4c4f4646 /* "LOFF" */ | |
32f3c541 | 31 | #define MIDX_CHUNKLOOKUP_WIDTH (sizeof(uint32_t) + sizeof(uint64_t)) |
d7cacf29 | 32 | #define MIDX_CHUNK_FANOUT_SIZE (sizeof(uint32_t) * 256) |
662148c4 DS |
33 | #define MIDX_CHUNK_OFFSET_WIDTH (2 * sizeof(uint32_t)) |
34 | #define MIDX_CHUNK_LARGE_OFFSET_WIDTH (sizeof(uint64_t)) | |
35 | #define MIDX_LARGE_OFFSET_NEEDED 0x80000000 | |
32f3c541 | 36 | |
fc59e748 DS |
37 | static char *get_midx_filename(const char *object_dir) |
38 | { | |
39 | return xstrfmt("%s/pack/multi-pack-index", object_dir); | |
40 | } | |
41 | ||
2cf489a3 | 42 | struct multi_pack_index *load_multi_pack_index(const char *object_dir, int local) |
4d80560c DS |
43 | { |
44 | struct multi_pack_index *m = NULL; | |
45 | int fd; | |
46 | struct stat st; | |
47 | size_t midx_size; | |
48 | void *midx_map = NULL; | |
49 | uint32_t hash_version; | |
50 | char *midx_name = get_midx_filename(object_dir); | |
32f3c541 | 51 | uint32_t i; |
3227565c | 52 | const char *cur_pack_name; |
4d80560c DS |
53 | |
54 | fd = git_open(midx_name); | |
55 | ||
56 | if (fd < 0) | |
57 | goto cleanup_fail; | |
58 | if (fstat(fd, &st)) { | |
59 | error_errno(_("failed to read %s"), midx_name); | |
60 | goto cleanup_fail; | |
61 | } | |
62 | ||
63 | midx_size = xsize_t(st.st_size); | |
64 | ||
65 | if (midx_size < MIDX_MIN_SIZE) { | |
66 | error(_("multi-pack-index file %s is too small"), midx_name); | |
67 | goto cleanup_fail; | |
68 | } | |
69 | ||
70 | FREE_AND_NULL(midx_name); | |
71 | ||
72 | midx_map = xmmap(NULL, midx_size, PROT_READ, MAP_PRIVATE, fd, 0); | |
73 | ||
577314ca | 74 | FLEX_ALLOC_STR(m, object_dir, object_dir); |
4d80560c DS |
75 | m->fd = fd; |
76 | m->data = midx_map; | |
77 | m->data_len = midx_size; | |
2cf489a3 | 78 | m->local = local; |
4d80560c DS |
79 | |
80 | m->signature = get_be32(m->data); | |
53ad0407 DS |
81 | if (m->signature != MIDX_SIGNATURE) |
82 | die(_("multi-pack-index signature 0x%08x does not match signature 0x%08x"), | |
4d80560c | 83 | m->signature, MIDX_SIGNATURE); |
4d80560c DS |
84 | |
85 | m->version = m->data[MIDX_BYTE_FILE_VERSION]; | |
53ad0407 DS |
86 | if (m->version != MIDX_VERSION) |
87 | die(_("multi-pack-index version %d not recognized"), | |
4d80560c | 88 | m->version); |
4d80560c DS |
89 | |
90 | hash_version = m->data[MIDX_BYTE_HASH_VERSION]; | |
53ad0407 DS |
91 | if (hash_version != MIDX_HASH_VERSION) |
92 | die(_("hash version %u does not match"), hash_version); | |
4d80560c DS |
93 | m->hash_len = MIDX_HASH_LEN; |
94 | ||
95 | m->num_chunks = m->data[MIDX_BYTE_NUM_CHUNKS]; | |
96 | ||
97 | m->num_packs = get_be32(m->data + MIDX_BYTE_NUM_PACKS); | |
98 | ||
32f3c541 DS |
99 | for (i = 0; i < m->num_chunks; i++) { |
100 | uint32_t chunk_id = get_be32(m->data + MIDX_HEADER_SIZE + | |
101 | MIDX_CHUNKLOOKUP_WIDTH * i); | |
102 | uint64_t chunk_offset = get_be64(m->data + MIDX_HEADER_SIZE + 4 + | |
103 | MIDX_CHUNKLOOKUP_WIDTH * i); | |
104 | ||
d3f8e211 DS |
105 | if (chunk_offset >= m->data_len) |
106 | die(_("invalid chunk offset (too large)")); | |
107 | ||
32f3c541 DS |
108 | switch (chunk_id) { |
109 | case MIDX_CHUNKID_PACKNAMES: | |
110 | m->chunk_pack_names = m->data + chunk_offset; | |
111 | break; | |
112 | ||
d7cacf29 DS |
113 | case MIDX_CHUNKID_OIDFANOUT: |
114 | m->chunk_oid_fanout = (uint32_t *)(m->data + chunk_offset); | |
115 | break; | |
116 | ||
0d5b3a5e DS |
117 | case MIDX_CHUNKID_OIDLOOKUP: |
118 | m->chunk_oid_lookup = m->data + chunk_offset; | |
119 | break; | |
120 | ||
662148c4 DS |
121 | case MIDX_CHUNKID_OBJECTOFFSETS: |
122 | m->chunk_object_offsets = m->data + chunk_offset; | |
123 | break; | |
124 | ||
125 | case MIDX_CHUNKID_LARGEOFFSETS: | |
126 | m->chunk_large_offsets = m->data + chunk_offset; | |
127 | break; | |
128 | ||
32f3c541 DS |
129 | case 0: |
130 | die(_("terminating multi-pack-index chunk id appears earlier than expected")); | |
131 | break; | |
132 | ||
133 | default: | |
134 | /* | |
135 | * Do nothing on unrecognized chunks, allowing future | |
136 | * extensions to add optional chunks. | |
137 | */ | |
138 | break; | |
139 | } | |
140 | } | |
141 | ||
142 | if (!m->chunk_pack_names) | |
143 | die(_("multi-pack-index missing required pack-name chunk")); | |
d7cacf29 DS |
144 | if (!m->chunk_oid_fanout) |
145 | die(_("multi-pack-index missing required OID fanout chunk")); | |
0d5b3a5e DS |
146 | if (!m->chunk_oid_lookup) |
147 | die(_("multi-pack-index missing required OID lookup chunk")); | |
662148c4 DS |
148 | if (!m->chunk_object_offsets) |
149 | die(_("multi-pack-index missing required object offsets chunk")); | |
32f3c541 | 150 | |
d7cacf29 DS |
151 | m->num_objects = ntohl(m->chunk_oid_fanout[255]); |
152 | ||
3227565c | 153 | m->pack_names = xcalloc(m->num_packs, sizeof(*m->pack_names)); |
3715a633 | 154 | m->packs = xcalloc(m->num_packs, sizeof(*m->packs)); |
3227565c DS |
155 | |
156 | cur_pack_name = (const char *)m->chunk_pack_names; | |
157 | for (i = 0; i < m->num_packs; i++) { | |
158 | m->pack_names[i] = cur_pack_name; | |
159 | ||
160 | cur_pack_name += strlen(cur_pack_name) + 1; | |
161 | ||
8e72a3c3 DS |
162 | if (i && strcmp(m->pack_names[i], m->pack_names[i - 1]) <= 0) |
163 | die(_("multi-pack-index pack names out of order: '%s' before '%s'"), | |
3227565c DS |
164 | m->pack_names[i - 1], |
165 | m->pack_names[i]); | |
3227565c DS |
166 | } |
167 | ||
d829223a JH |
168 | trace2_data_intmax("midx", the_repository, "load/num_packs", m->num_packs); |
169 | trace2_data_intmax("midx", the_repository, "load/num_objects", m->num_objects); | |
170 | ||
4d80560c DS |
171 | return m; |
172 | ||
173 | cleanup_fail: | |
174 | free(m); | |
175 | free(midx_name); | |
176 | if (midx_map) | |
177 | munmap(midx_map, midx_size); | |
178 | if (0 <= fd) | |
179 | close(fd); | |
180 | return NULL; | |
181 | } | |
182 | ||
1dcd9f20 | 183 | void close_midx(struct multi_pack_index *m) |
a40498a1 DS |
184 | { |
185 | uint32_t i; | |
1dcd9f20 DS |
186 | |
187 | if (!m) | |
188 | return; | |
189 | ||
a40498a1 DS |
190 | munmap((unsigned char *)m->data, m->data_len); |
191 | close(m->fd); | |
192 | m->fd = -1; | |
193 | ||
194 | for (i = 0; i < m->num_packs; i++) { | |
af96fe33 DS |
195 | if (m->packs[i]) |
196 | m->packs[i]->multi_pack_index = 0; | |
a40498a1 DS |
197 | } |
198 | FREE_AND_NULL(m->packs); | |
199 | FREE_AND_NULL(m->pack_names); | |
200 | } | |
201 | ||
64404a24 | 202 | int prepare_midx_pack(struct repository *r, struct multi_pack_index *m, uint32_t pack_int_id) |
3715a633 DS |
203 | { |
204 | struct strbuf pack_name = STRBUF_INIT; | |
af96fe33 | 205 | struct packed_git *p; |
3715a633 DS |
206 | |
207 | if (pack_int_id >= m->num_packs) | |
d355e46a | 208 | die(_("bad pack-int-id: %u (%u total packs)"), |
cc6af73c | 209 | pack_int_id, m->num_packs); |
3715a633 DS |
210 | |
211 | if (m->packs[pack_int_id]) | |
212 | return 0; | |
213 | ||
214 | strbuf_addf(&pack_name, "%s/pack/%s", m->object_dir, | |
215 | m->pack_names[pack_int_id]); | |
216 | ||
af96fe33 | 217 | p = add_packed_git(pack_name.buf, pack_name.len, m->local); |
3715a633 | 218 | strbuf_release(&pack_name); |
af96fe33 DS |
219 | |
220 | if (!p) | |
221 | return 1; | |
222 | ||
223 | p->multi_pack_index = 1; | |
224 | m->packs[pack_int_id] = p; | |
225 | install_packed_git(r, p); | |
226 | list_add_tail(&p->mru, &r->objects->packed_git_mru); | |
227 | ||
228 | return 0; | |
3715a633 DS |
229 | } |
230 | ||
231 | int bsearch_midx(const struct object_id *oid, struct multi_pack_index *m, uint32_t *result) | |
232 | { | |
233 | return bsearch_hash(oid->hash, m->chunk_oid_fanout, m->chunk_oid_lookup, | |
234 | MIDX_HASH_LEN, result); | |
235 | } | |
236 | ||
8aac67a1 DS |
237 | struct object_id *nth_midxed_object_oid(struct object_id *oid, |
238 | struct multi_pack_index *m, | |
239 | uint32_t n) | |
240 | { | |
241 | if (n >= m->num_objects) | |
242 | return NULL; | |
243 | ||
244 | hashcpy(oid->hash, m->chunk_oid_lookup + m->hash_len * n); | |
245 | return oid; | |
246 | } | |
247 | ||
3715a633 DS |
248 | static off_t nth_midxed_offset(struct multi_pack_index *m, uint32_t pos) |
249 | { | |
250 | const unsigned char *offset_data; | |
251 | uint32_t offset32; | |
252 | ||
253 | offset_data = m->chunk_object_offsets + pos * MIDX_CHUNK_OFFSET_WIDTH; | |
254 | offset32 = get_be32(offset_data + sizeof(uint32_t)); | |
255 | ||
256 | if (m->chunk_large_offsets && offset32 & MIDX_LARGE_OFFSET_NEEDED) { | |
d8ac9ee1 | 257 | if (sizeof(off_t) < sizeof(uint64_t)) |
3715a633 DS |
258 | die(_("multi-pack-index stores a 64-bit offset, but off_t is too small")); |
259 | ||
260 | offset32 ^= MIDX_LARGE_OFFSET_NEEDED; | |
261 | return get_be64(m->chunk_large_offsets + sizeof(uint64_t) * offset32); | |
262 | } | |
263 | ||
264 | return offset32; | |
265 | } | |
266 | ||
267 | static uint32_t nth_midxed_pack_int_id(struct multi_pack_index *m, uint32_t pos) | |
268 | { | |
269 | return get_be32(m->chunk_object_offsets + pos * MIDX_CHUNK_OFFSET_WIDTH); | |
270 | } | |
271 | ||
64404a24 DS |
272 | static int nth_midxed_pack_entry(struct repository *r, |
273 | struct multi_pack_index *m, | |
274 | struct pack_entry *e, | |
275 | uint32_t pos) | |
3715a633 DS |
276 | { |
277 | uint32_t pack_int_id; | |
278 | struct packed_git *p; | |
279 | ||
280 | if (pos >= m->num_objects) | |
281 | return 0; | |
282 | ||
283 | pack_int_id = nth_midxed_pack_int_id(m, pos); | |
284 | ||
64404a24 | 285 | if (prepare_midx_pack(r, m, pack_int_id)) |
3715a633 DS |
286 | die(_("error preparing packfile from multi-pack-index")); |
287 | p = m->packs[pack_int_id]; | |
288 | ||
289 | /* | |
290 | * We are about to tell the caller where they can locate the | |
291 | * requested object. We better make sure the packfile is | |
292 | * still here and can be accessed before supplying that | |
293 | * answer, as it may have been deleted since the MIDX was | |
294 | * loaded! | |
295 | */ | |
296 | if (!is_pack_valid(p)) | |
297 | return 0; | |
298 | ||
c39b02ae DS |
299 | if (p->num_bad_objects) { |
300 | uint32_t i; | |
301 | struct object_id oid; | |
302 | nth_midxed_object_oid(&oid, m, pos); | |
303 | for (i = 0; i < p->num_bad_objects; i++) | |
e43d2dcc JK |
304 | if (hasheq(oid.hash, |
305 | p->bad_object_sha1 + the_hash_algo->rawsz * i)) | |
c39b02ae DS |
306 | return 0; |
307 | } | |
308 | ||
3715a633 DS |
309 | e->offset = nth_midxed_offset(m, pos); |
310 | e->p = p; | |
311 | ||
312 | return 1; | |
313 | } | |
314 | ||
64404a24 DS |
315 | int fill_midx_entry(struct repository * r, |
316 | const struct object_id *oid, | |
317 | struct pack_entry *e, | |
318 | struct multi_pack_index *m) | |
3715a633 DS |
319 | { |
320 | uint32_t pos; | |
321 | ||
322 | if (!bsearch_midx(oid, m, &pos)) | |
323 | return 0; | |
324 | ||
64404a24 | 325 | return nth_midxed_pack_entry(r, m, e, pos); |
3715a633 DS |
326 | } |
327 | ||
013fd7ad JK |
328 | /* Match "foo.idx" against either "foo.pack" _or_ "foo.idx". */ |
329 | static int cmp_idx_or_pack_name(const char *idx_or_pack_name, | |
330 | const char *idx_name) | |
331 | { | |
332 | /* Skip past any initial matching prefix. */ | |
333 | while (*idx_name && *idx_name == *idx_or_pack_name) { | |
334 | idx_name++; | |
335 | idx_or_pack_name++; | |
336 | } | |
337 | ||
338 | /* | |
339 | * If we didn't match completely, we may have matched "pack-1234." and | |
340 | * be left with "idx" and "pack" respectively, which is also OK. We do | |
341 | * not have to check for "idx" and "idx", because that would have been | |
342 | * a complete match (and in that case these strcmps will be false, but | |
343 | * we'll correctly return 0 from the final strcmp() below. | |
344 | * | |
345 | * Technically this matches "fooidx" and "foopack", but we'd never have | |
346 | * such names in the first place. | |
347 | */ | |
348 | if (!strcmp(idx_name, "idx") && !strcmp(idx_or_pack_name, "pack")) | |
349 | return 0; | |
350 | ||
351 | /* | |
352 | * This not only checks for a complete match, but also orders based on | |
353 | * the first non-identical character, which means our ordering will | |
354 | * match a raw strcmp(). That makes it OK to use this to binary search | |
355 | * a naively-sorted list. | |
356 | */ | |
357 | return strcmp(idx_or_pack_name, idx_name); | |
358 | } | |
359 | ||
360 | int midx_contains_pack(struct multi_pack_index *m, const char *idx_or_pack_name) | |
a40498a1 DS |
361 | { |
362 | uint32_t first = 0, last = m->num_packs; | |
363 | ||
364 | while (first < last) { | |
365 | uint32_t mid = first + (last - first) / 2; | |
366 | const char *current; | |
367 | int cmp; | |
368 | ||
369 | current = m->pack_names[mid]; | |
013fd7ad | 370 | cmp = cmp_idx_or_pack_name(idx_or_pack_name, current); |
a40498a1 DS |
371 | if (!cmp) |
372 | return 1; | |
373 | if (cmp > 0) { | |
374 | first = mid + 1; | |
375 | continue; | |
376 | } | |
377 | last = mid; | |
378 | } | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
2cf489a3 | 383 | int prepare_multi_pack_index_one(struct repository *r, const char *object_dir, int local) |
c4d25228 | 384 | { |
29e2016b | 385 | struct multi_pack_index *m; |
c4d25228 DS |
386 | struct multi_pack_index *m_search; |
387 | int config_value; | |
0465a505 | 388 | static int env_value = -1; |
c4d25228 | 389 | |
0465a505 DS |
390 | if (env_value < 0) |
391 | env_value = git_env_bool(GIT_TEST_MULTI_PACK_INDEX, 0); | |
c4d25228 | 392 | |
0465a505 DS |
393 | if (!env_value && |
394 | (repo_config_get_bool(r, "core.multipackindex", &config_value) || | |
395 | !config_value)) | |
c4d25228 DS |
396 | return 0; |
397 | ||
29e2016b | 398 | for (m_search = r->objects->multi_pack_index; m_search; m_search = m_search->next) |
c4d25228 DS |
399 | if (!strcmp(object_dir, m_search->object_dir)) |
400 | return 1; | |
401 | ||
29e2016b | 402 | m = load_multi_pack_index(object_dir, local); |
c4d25228 | 403 | |
29e2016b DS |
404 | if (m) { |
405 | m->next = r->objects->multi_pack_index; | |
406 | r->objects->multi_pack_index = m; | |
c4d25228 DS |
407 | return 1; |
408 | } | |
409 | ||
410 | return 0; | |
411 | } | |
412 | ||
fc59e748 DS |
413 | static size_t write_midx_header(struct hashfile *f, |
414 | unsigned char num_chunks, | |
415 | uint32_t num_packs) | |
416 | { | |
417 | unsigned char byte_values[4]; | |
418 | ||
419 | hashwrite_be32(f, MIDX_SIGNATURE); | |
420 | byte_values[0] = MIDX_VERSION; | |
421 | byte_values[1] = MIDX_HASH_VERSION; | |
422 | byte_values[2] = num_chunks; | |
423 | byte_values[3] = 0; /* unused */ | |
424 | hashwrite(f, byte_values, sizeof(byte_values)); | |
425 | hashwrite_be32(f, num_packs); | |
426 | ||
427 | return MIDX_HEADER_SIZE; | |
428 | } | |
429 | ||
396f2570 DS |
430 | struct pack_list { |
431 | struct packed_git **list; | |
32f3c541 | 432 | char **names; |
396f2570 DS |
433 | uint32_t nr; |
434 | uint32_t alloc_list; | |
32f3c541 DS |
435 | uint32_t alloc_names; |
436 | size_t pack_name_concat_len; | |
a40498a1 | 437 | struct multi_pack_index *m; |
396f2570 DS |
438 | }; |
439 | ||
440 | static void add_pack_to_midx(const char *full_path, size_t full_path_len, | |
441 | const char *file_name, void *data) | |
442 | { | |
443 | struct pack_list *packs = (struct pack_list *)data; | |
444 | ||
445 | if (ends_with(file_name, ".idx")) { | |
a40498a1 DS |
446 | if (packs->m && midx_contains_pack(packs->m, file_name)) |
447 | return; | |
448 | ||
396f2570 | 449 | ALLOC_GROW(packs->list, packs->nr + 1, packs->alloc_list); |
32f3c541 | 450 | ALLOC_GROW(packs->names, packs->nr + 1, packs->alloc_names); |
396f2570 DS |
451 | |
452 | packs->list[packs->nr] = add_packed_git(full_path, | |
453 | full_path_len, | |
454 | 0); | |
fe1ed56f | 455 | |
396f2570 DS |
456 | if (!packs->list[packs->nr]) { |
457 | warning(_("failed to add packfile '%s'"), | |
458 | full_path); | |
459 | return; | |
460 | } | |
461 | ||
fe1ed56f DS |
462 | if (open_pack_index(packs->list[packs->nr])) { |
463 | warning(_("failed to open pack-index '%s'"), | |
464 | full_path); | |
465 | close_pack(packs->list[packs->nr]); | |
466 | FREE_AND_NULL(packs->list[packs->nr]); | |
467 | return; | |
468 | } | |
469 | ||
32f3c541 DS |
470 | packs->names[packs->nr] = xstrdup(file_name); |
471 | packs->pack_name_concat_len += strlen(file_name) + 1; | |
396f2570 DS |
472 | packs->nr++; |
473 | } | |
474 | } | |
475 | ||
32f3c541 DS |
476 | struct pack_pair { |
477 | uint32_t pack_int_id; | |
478 | char *pack_name; | |
479 | }; | |
480 | ||
481 | static int pack_pair_compare(const void *_a, const void *_b) | |
482 | { | |
483 | struct pack_pair *a = (struct pack_pair *)_a; | |
484 | struct pack_pair *b = (struct pack_pair *)_b; | |
485 | return strcmp(a->pack_name, b->pack_name); | |
486 | } | |
487 | ||
488 | static void sort_packs_by_name(char **pack_names, uint32_t nr_packs, uint32_t *perm) | |
489 | { | |
490 | uint32_t i; | |
491 | struct pack_pair *pairs; | |
492 | ||
493 | ALLOC_ARRAY(pairs, nr_packs); | |
494 | ||
495 | for (i = 0; i < nr_packs; i++) { | |
496 | pairs[i].pack_int_id = i; | |
497 | pairs[i].pack_name = pack_names[i]; | |
498 | } | |
499 | ||
500 | QSORT(pairs, nr_packs, pack_pair_compare); | |
501 | ||
502 | for (i = 0; i < nr_packs; i++) { | |
503 | pack_names[i] = pairs[i].pack_name; | |
504 | perm[pairs[i].pack_int_id] = i; | |
505 | } | |
506 | ||
507 | free(pairs); | |
508 | } | |
509 | ||
fe1ed56f DS |
510 | struct pack_midx_entry { |
511 | struct object_id oid; | |
512 | uint32_t pack_int_id; | |
513 | time_t pack_mtime; | |
514 | uint64_t offset; | |
515 | }; | |
516 | ||
517 | static int midx_oid_compare(const void *_a, const void *_b) | |
518 | { | |
519 | const struct pack_midx_entry *a = (const struct pack_midx_entry *)_a; | |
520 | const struct pack_midx_entry *b = (const struct pack_midx_entry *)_b; | |
521 | int cmp = oidcmp(&a->oid, &b->oid); | |
522 | ||
523 | if (cmp) | |
524 | return cmp; | |
525 | ||
526 | if (a->pack_mtime > b->pack_mtime) | |
527 | return -1; | |
528 | else if (a->pack_mtime < b->pack_mtime) | |
529 | return 1; | |
530 | ||
531 | return a->pack_int_id - b->pack_int_id; | |
532 | } | |
533 | ||
a40498a1 DS |
534 | static int nth_midxed_pack_midx_entry(struct multi_pack_index *m, |
535 | uint32_t *pack_perm, | |
536 | struct pack_midx_entry *e, | |
537 | uint32_t pos) | |
538 | { | |
539 | if (pos >= m->num_objects) | |
540 | return 1; | |
541 | ||
542 | nth_midxed_object_oid(&e->oid, m, pos); | |
543 | e->pack_int_id = pack_perm[nth_midxed_pack_int_id(m, pos)]; | |
544 | e->offset = nth_midxed_offset(m, pos); | |
545 | ||
546 | /* consider objects in midx to be from "old" packs */ | |
547 | e->pack_mtime = 0; | |
548 | return 0; | |
549 | } | |
550 | ||
fe1ed56f DS |
551 | static void fill_pack_entry(uint32_t pack_int_id, |
552 | struct packed_git *p, | |
553 | uint32_t cur_object, | |
554 | struct pack_midx_entry *entry) | |
555 | { | |
556 | if (!nth_packed_object_oid(&entry->oid, p, cur_object)) | |
557 | die(_("failed to locate object %d in packfile"), cur_object); | |
558 | ||
559 | entry->pack_int_id = pack_int_id; | |
560 | entry->pack_mtime = p->mtime; | |
561 | ||
562 | entry->offset = nth_packed_object_offset(p, cur_object); | |
563 | } | |
564 | ||
565 | /* | |
566 | * It is possible to artificially get into a state where there are many | |
567 | * duplicate copies of objects. That can create high memory pressure if | |
568 | * we are to create a list of all objects before de-duplication. To reduce | |
569 | * this memory pressure without a significant performance drop, automatically | |
570 | * group objects by the first byte of their object id. Use the IDX fanout | |
571 | * tables to group the data, copy to a local array, then sort. | |
572 | * | |
573 | * Copy only the de-duplicated entries (selected by most-recent modified time | |
574 | * of a packfile containing the object). | |
575 | */ | |
a40498a1 DS |
576 | static struct pack_midx_entry *get_sorted_entries(struct multi_pack_index *m, |
577 | struct packed_git **p, | |
fe1ed56f DS |
578 | uint32_t *perm, |
579 | uint32_t nr_packs, | |
580 | uint32_t *nr_objects) | |
581 | { | |
582 | uint32_t cur_fanout, cur_pack, cur_object; | |
583 | uint32_t alloc_fanout, alloc_objects, total_objects = 0; | |
584 | struct pack_midx_entry *entries_by_fanout = NULL; | |
585 | struct pack_midx_entry *deduplicated_entries = NULL; | |
a40498a1 | 586 | uint32_t start_pack = m ? m->num_packs : 0; |
fe1ed56f | 587 | |
a40498a1 | 588 | for (cur_pack = start_pack; cur_pack < nr_packs; cur_pack++) |
fe1ed56f DS |
589 | total_objects += p[cur_pack]->num_objects; |
590 | ||
591 | /* | |
592 | * As we de-duplicate by fanout value, we expect the fanout | |
593 | * slices to be evenly distributed, with some noise. Hence, | |
594 | * allocate slightly more than one 256th. | |
595 | */ | |
596 | alloc_objects = alloc_fanout = total_objects > 3200 ? total_objects / 200 : 16; | |
597 | ||
598 | ALLOC_ARRAY(entries_by_fanout, alloc_fanout); | |
599 | ALLOC_ARRAY(deduplicated_entries, alloc_objects); | |
600 | *nr_objects = 0; | |
601 | ||
602 | for (cur_fanout = 0; cur_fanout < 256; cur_fanout++) { | |
603 | uint32_t nr_fanout = 0; | |
604 | ||
a40498a1 DS |
605 | if (m) { |
606 | uint32_t start = 0, end; | |
607 | ||
608 | if (cur_fanout) | |
609 | start = ntohl(m->chunk_oid_fanout[cur_fanout - 1]); | |
610 | end = ntohl(m->chunk_oid_fanout[cur_fanout]); | |
611 | ||
612 | for (cur_object = start; cur_object < end; cur_object++) { | |
613 | ALLOC_GROW(entries_by_fanout, nr_fanout + 1, alloc_fanout); | |
614 | nth_midxed_pack_midx_entry(m, perm, | |
615 | &entries_by_fanout[nr_fanout], | |
616 | cur_object); | |
617 | nr_fanout++; | |
618 | } | |
619 | } | |
620 | ||
621 | for (cur_pack = start_pack; cur_pack < nr_packs; cur_pack++) { | |
fe1ed56f DS |
622 | uint32_t start = 0, end; |
623 | ||
624 | if (cur_fanout) | |
625 | start = get_pack_fanout(p[cur_pack], cur_fanout - 1); | |
626 | end = get_pack_fanout(p[cur_pack], cur_fanout); | |
627 | ||
628 | for (cur_object = start; cur_object < end; cur_object++) { | |
629 | ALLOC_GROW(entries_by_fanout, nr_fanout + 1, alloc_fanout); | |
630 | fill_pack_entry(perm[cur_pack], p[cur_pack], cur_object, &entries_by_fanout[nr_fanout]); | |
631 | nr_fanout++; | |
632 | } | |
633 | } | |
634 | ||
635 | QSORT(entries_by_fanout, nr_fanout, midx_oid_compare); | |
636 | ||
637 | /* | |
638 | * The batch is now sorted by OID and then mtime (descending). | |
639 | * Take only the first duplicate. | |
640 | */ | |
641 | for (cur_object = 0; cur_object < nr_fanout; cur_object++) { | |
e43d2dcc JK |
642 | if (cur_object && oideq(&entries_by_fanout[cur_object - 1].oid, |
643 | &entries_by_fanout[cur_object].oid)) | |
fe1ed56f DS |
644 | continue; |
645 | ||
646 | ALLOC_GROW(deduplicated_entries, *nr_objects + 1, alloc_objects); | |
647 | memcpy(&deduplicated_entries[*nr_objects], | |
648 | &entries_by_fanout[cur_object], | |
649 | sizeof(struct pack_midx_entry)); | |
650 | (*nr_objects)++; | |
651 | } | |
652 | } | |
653 | ||
654 | free(entries_by_fanout); | |
655 | return deduplicated_entries; | |
656 | } | |
657 | ||
32f3c541 DS |
658 | static size_t write_midx_pack_names(struct hashfile *f, |
659 | char **pack_names, | |
660 | uint32_t num_packs) | |
661 | { | |
662 | uint32_t i; | |
663 | unsigned char padding[MIDX_CHUNK_ALIGNMENT]; | |
664 | size_t written = 0; | |
665 | ||
666 | for (i = 0; i < num_packs; i++) { | |
667 | size_t writelen = strlen(pack_names[i]) + 1; | |
668 | ||
669 | if (i && strcmp(pack_names[i], pack_names[i - 1]) <= 0) | |
670 | BUG("incorrect pack-file order: %s before %s", | |
671 | pack_names[i - 1], | |
672 | pack_names[i]); | |
673 | ||
674 | hashwrite(f, pack_names[i], writelen); | |
675 | written += writelen; | |
676 | } | |
677 | ||
678 | /* add padding to be aligned */ | |
679 | i = MIDX_CHUNK_ALIGNMENT - (written % MIDX_CHUNK_ALIGNMENT); | |
680 | if (i < MIDX_CHUNK_ALIGNMENT) { | |
681 | memset(padding, 0, sizeof(padding)); | |
682 | hashwrite(f, padding, i); | |
683 | written += i; | |
684 | } | |
685 | ||
686 | return written; | |
687 | } | |
688 | ||
d7cacf29 DS |
689 | static size_t write_midx_oid_fanout(struct hashfile *f, |
690 | struct pack_midx_entry *objects, | |
691 | uint32_t nr_objects) | |
692 | { | |
693 | struct pack_midx_entry *list = objects; | |
694 | struct pack_midx_entry *last = objects + nr_objects; | |
695 | uint32_t count = 0; | |
696 | uint32_t i; | |
697 | ||
698 | /* | |
699 | * Write the first-level table (the list is sorted, | |
700 | * but we use a 256-entry lookup to be able to avoid | |
701 | * having to do eight extra binary search iterations). | |
702 | */ | |
703 | for (i = 0; i < 256; i++) { | |
704 | struct pack_midx_entry *next = list; | |
705 | ||
706 | while (next < last && next->oid.hash[0] == i) { | |
707 | count++; | |
708 | next++; | |
709 | } | |
710 | ||
711 | hashwrite_be32(f, count); | |
712 | list = next; | |
713 | } | |
714 | ||
715 | return MIDX_CHUNK_FANOUT_SIZE; | |
716 | } | |
717 | ||
0d5b3a5e DS |
718 | static size_t write_midx_oid_lookup(struct hashfile *f, unsigned char hash_len, |
719 | struct pack_midx_entry *objects, | |
720 | uint32_t nr_objects) | |
721 | { | |
722 | struct pack_midx_entry *list = objects; | |
723 | uint32_t i; | |
724 | size_t written = 0; | |
725 | ||
726 | for (i = 0; i < nr_objects; i++) { | |
727 | struct pack_midx_entry *obj = list++; | |
728 | ||
729 | if (i < nr_objects - 1) { | |
730 | struct pack_midx_entry *next = list; | |
731 | if (oidcmp(&obj->oid, &next->oid) >= 0) | |
732 | BUG("OIDs not in order: %s >= %s", | |
733 | oid_to_hex(&obj->oid), | |
734 | oid_to_hex(&next->oid)); | |
735 | } | |
736 | ||
737 | hashwrite(f, obj->oid.hash, (int)hash_len); | |
738 | written += hash_len; | |
739 | } | |
740 | ||
741 | return written; | |
742 | } | |
743 | ||
662148c4 DS |
744 | static size_t write_midx_object_offsets(struct hashfile *f, int large_offset_needed, |
745 | struct pack_midx_entry *objects, uint32_t nr_objects) | |
746 | { | |
747 | struct pack_midx_entry *list = objects; | |
748 | uint32_t i, nr_large_offset = 0; | |
749 | size_t written = 0; | |
750 | ||
751 | for (i = 0; i < nr_objects; i++) { | |
752 | struct pack_midx_entry *obj = list++; | |
753 | ||
754 | hashwrite_be32(f, obj->pack_int_id); | |
755 | ||
756 | if (large_offset_needed && obj->offset >> 31) | |
757 | hashwrite_be32(f, MIDX_LARGE_OFFSET_NEEDED | nr_large_offset++); | |
758 | else if (!large_offset_needed && obj->offset >> 32) | |
759 | BUG("object %s requires a large offset (%"PRIx64") but the MIDX is not writing large offsets!", | |
760 | oid_to_hex(&obj->oid), | |
761 | obj->offset); | |
762 | else | |
763 | hashwrite_be32(f, (uint32_t)obj->offset); | |
764 | ||
765 | written += MIDX_CHUNK_OFFSET_WIDTH; | |
766 | } | |
767 | ||
768 | return written; | |
769 | } | |
770 | ||
771 | static size_t write_midx_large_offsets(struct hashfile *f, uint32_t nr_large_offset, | |
772 | struct pack_midx_entry *objects, uint32_t nr_objects) | |
773 | { | |
61b0fcbb | 774 | struct pack_midx_entry *list = objects, *end = objects + nr_objects; |
662148c4 DS |
775 | size_t written = 0; |
776 | ||
777 | while (nr_large_offset) { | |
61b0fcbb JK |
778 | struct pack_midx_entry *obj; |
779 | uint64_t offset; | |
780 | ||
781 | if (list >= end) | |
782 | BUG("too many large-offset objects"); | |
783 | ||
784 | obj = list++; | |
785 | offset = obj->offset; | |
662148c4 DS |
786 | |
787 | if (!(offset >> 31)) | |
788 | continue; | |
789 | ||
790 | hashwrite_be32(f, offset >> 32); | |
791 | hashwrite_be32(f, offset & 0xffffffffUL); | |
792 | written += 2 * sizeof(uint32_t); | |
793 | ||
794 | nr_large_offset--; | |
795 | } | |
796 | ||
797 | return written; | |
798 | } | |
799 | ||
a3407730 DS |
800 | int write_midx_file(const char *object_dir) |
801 | { | |
32f3c541 | 802 | unsigned char cur_chunk, num_chunks = 0; |
fc59e748 | 803 | char *midx_name; |
396f2570 | 804 | uint32_t i; |
fc59e748 DS |
805 | struct hashfile *f = NULL; |
806 | struct lock_file lk; | |
396f2570 | 807 | struct pack_list packs; |
32f3c541 DS |
808 | uint32_t *pack_perm = NULL; |
809 | uint64_t written = 0; | |
810 | uint32_t chunk_ids[MIDX_MAX_CHUNKS + 1]; | |
811 | uint64_t chunk_offsets[MIDX_MAX_CHUNKS + 1]; | |
662148c4 | 812 | uint32_t nr_entries, num_large_offsets = 0; |
fe1ed56f | 813 | struct pack_midx_entry *entries = NULL; |
662148c4 | 814 | int large_offsets_needed = 0; |
fc59e748 DS |
815 | |
816 | midx_name = get_midx_filename(object_dir); | |
817 | if (safe_create_leading_directories(midx_name)) { | |
818 | UNLEAK(midx_name); | |
819 | die_errno(_("unable to create leading directories of %s"), | |
820 | midx_name); | |
821 | } | |
822 | ||
2cf489a3 | 823 | packs.m = load_multi_pack_index(object_dir, 1); |
a40498a1 | 824 | |
396f2570 | 825 | packs.nr = 0; |
a40498a1 DS |
826 | packs.alloc_list = packs.m ? packs.m->num_packs : 16; |
827 | packs.alloc_names = packs.alloc_list; | |
396f2570 | 828 | packs.list = NULL; |
a40498a1 | 829 | packs.names = NULL; |
32f3c541 | 830 | packs.pack_name_concat_len = 0; |
396f2570 | 831 | ALLOC_ARRAY(packs.list, packs.alloc_list); |
32f3c541 | 832 | ALLOC_ARRAY(packs.names, packs.alloc_names); |
396f2570 | 833 | |
a40498a1 DS |
834 | if (packs.m) { |
835 | for (i = 0; i < packs.m->num_packs; i++) { | |
836 | ALLOC_GROW(packs.list, packs.nr + 1, packs.alloc_list); | |
837 | ALLOC_GROW(packs.names, packs.nr + 1, packs.alloc_names); | |
838 | ||
839 | packs.list[packs.nr] = NULL; | |
840 | packs.names[packs.nr] = xstrdup(packs.m->pack_names[i]); | |
841 | packs.pack_name_concat_len += strlen(packs.names[packs.nr]) + 1; | |
842 | packs.nr++; | |
843 | } | |
844 | } | |
845 | ||
396f2570 DS |
846 | for_each_file_in_pack_dir(object_dir, add_pack_to_midx, &packs); |
847 | ||
a40498a1 DS |
848 | if (packs.m && packs.nr == packs.m->num_packs) |
849 | goto cleanup; | |
850 | ||
32f3c541 DS |
851 | if (packs.pack_name_concat_len % MIDX_CHUNK_ALIGNMENT) |
852 | packs.pack_name_concat_len += MIDX_CHUNK_ALIGNMENT - | |
853 | (packs.pack_name_concat_len % MIDX_CHUNK_ALIGNMENT); | |
854 | ||
855 | ALLOC_ARRAY(pack_perm, packs.nr); | |
856 | sort_packs_by_name(packs.names, packs.nr, pack_perm); | |
857 | ||
a40498a1 DS |
858 | entries = get_sorted_entries(packs.m, packs.list, pack_perm, packs.nr, &nr_entries); |
859 | ||
662148c4 DS |
860 | for (i = 0; i < nr_entries; i++) { |
861 | if (entries[i].offset > 0x7fffffff) | |
862 | num_large_offsets++; | |
863 | if (entries[i].offset > 0xffffffff) | |
864 | large_offsets_needed = 1; | |
865 | } | |
fe1ed56f | 866 | |
fc59e748 DS |
867 | hold_lock_file_for_update(&lk, midx_name, LOCK_DIE_ON_ERROR); |
868 | f = hashfd(lk.tempfile->fd, lk.tempfile->filename.buf); | |
869 | FREE_AND_NULL(midx_name); | |
870 | ||
a40498a1 DS |
871 | if (packs.m) |
872 | close_midx(packs.m); | |
873 | ||
32f3c541 | 874 | cur_chunk = 0; |
662148c4 | 875 | num_chunks = large_offsets_needed ? 5 : 4; |
32f3c541 DS |
876 | |
877 | written = write_midx_header(f, num_chunks, packs.nr); | |
878 | ||
879 | chunk_ids[cur_chunk] = MIDX_CHUNKID_PACKNAMES; | |
880 | chunk_offsets[cur_chunk] = written + (num_chunks + 1) * MIDX_CHUNKLOOKUP_WIDTH; | |
881 | ||
882 | cur_chunk++; | |
d7cacf29 | 883 | chunk_ids[cur_chunk] = MIDX_CHUNKID_OIDFANOUT; |
32f3c541 DS |
884 | chunk_offsets[cur_chunk] = chunk_offsets[cur_chunk - 1] + packs.pack_name_concat_len; |
885 | ||
d7cacf29 DS |
886 | cur_chunk++; |
887 | chunk_ids[cur_chunk] = MIDX_CHUNKID_OIDLOOKUP; | |
888 | chunk_offsets[cur_chunk] = chunk_offsets[cur_chunk - 1] + MIDX_CHUNK_FANOUT_SIZE; | |
889 | ||
0d5b3a5e | 890 | cur_chunk++; |
662148c4 | 891 | chunk_ids[cur_chunk] = MIDX_CHUNKID_OBJECTOFFSETS; |
0d5b3a5e DS |
892 | chunk_offsets[cur_chunk] = chunk_offsets[cur_chunk - 1] + nr_entries * MIDX_HASH_LEN; |
893 | ||
662148c4 DS |
894 | cur_chunk++; |
895 | chunk_offsets[cur_chunk] = chunk_offsets[cur_chunk - 1] + nr_entries * MIDX_CHUNK_OFFSET_WIDTH; | |
896 | if (large_offsets_needed) { | |
897 | chunk_ids[cur_chunk] = MIDX_CHUNKID_LARGEOFFSETS; | |
898 | ||
899 | cur_chunk++; | |
900 | chunk_offsets[cur_chunk] = chunk_offsets[cur_chunk - 1] + | |
901 | num_large_offsets * MIDX_CHUNK_LARGE_OFFSET_WIDTH; | |
902 | } | |
903 | ||
904 | chunk_ids[cur_chunk] = 0; | |
905 | ||
32f3c541 DS |
906 | for (i = 0; i <= num_chunks; i++) { |
907 | if (i && chunk_offsets[i] < chunk_offsets[i - 1]) | |
908 | BUG("incorrect chunk offsets: %"PRIu64" before %"PRIu64, | |
909 | chunk_offsets[i - 1], | |
910 | chunk_offsets[i]); | |
911 | ||
912 | if (chunk_offsets[i] % MIDX_CHUNK_ALIGNMENT) | |
913 | BUG("chunk offset %"PRIu64" is not properly aligned", | |
914 | chunk_offsets[i]); | |
915 | ||
916 | hashwrite_be32(f, chunk_ids[i]); | |
917 | hashwrite_be32(f, chunk_offsets[i] >> 32); | |
918 | hashwrite_be32(f, chunk_offsets[i]); | |
919 | ||
920 | written += MIDX_CHUNKLOOKUP_WIDTH; | |
921 | } | |
922 | ||
923 | for (i = 0; i < num_chunks; i++) { | |
924 | if (written != chunk_offsets[i]) | |
925 | BUG("incorrect chunk offset (%"PRIu64" != %"PRIu64") for chunk id %"PRIx32, | |
926 | chunk_offsets[i], | |
927 | written, | |
928 | chunk_ids[i]); | |
929 | ||
930 | switch (chunk_ids[i]) { | |
931 | case MIDX_CHUNKID_PACKNAMES: | |
932 | written += write_midx_pack_names(f, packs.names, packs.nr); | |
933 | break; | |
934 | ||
d7cacf29 DS |
935 | case MIDX_CHUNKID_OIDFANOUT: |
936 | written += write_midx_oid_fanout(f, entries, nr_entries); | |
937 | break; | |
938 | ||
0d5b3a5e DS |
939 | case MIDX_CHUNKID_OIDLOOKUP: |
940 | written += write_midx_oid_lookup(f, MIDX_HASH_LEN, entries, nr_entries); | |
941 | break; | |
942 | ||
662148c4 DS |
943 | case MIDX_CHUNKID_OBJECTOFFSETS: |
944 | written += write_midx_object_offsets(f, large_offsets_needed, entries, nr_entries); | |
945 | break; | |
946 | ||
947 | case MIDX_CHUNKID_LARGEOFFSETS: | |
948 | written += write_midx_large_offsets(f, num_large_offsets, entries, nr_entries); | |
949 | break; | |
950 | ||
32f3c541 DS |
951 | default: |
952 | BUG("trying to write unknown chunk id %"PRIx32, | |
953 | chunk_ids[i]); | |
954 | } | |
955 | } | |
956 | ||
957 | if (written != chunk_offsets[num_chunks]) | |
958 | BUG("incorrect final offset %"PRIu64" != %"PRIu64, | |
959 | written, | |
960 | chunk_offsets[num_chunks]); | |
fc59e748 DS |
961 | |
962 | finalize_hashfile(f, NULL, CSUM_FSYNC | CSUM_HASH_IN_STREAM); | |
963 | commit_lock_file(&lk); | |
964 | ||
a40498a1 | 965 | cleanup: |
396f2570 DS |
966 | for (i = 0; i < packs.nr; i++) { |
967 | if (packs.list[i]) { | |
968 | close_pack(packs.list[i]); | |
969 | free(packs.list[i]); | |
970 | } | |
32f3c541 | 971 | free(packs.names[i]); |
396f2570 DS |
972 | } |
973 | ||
974 | free(packs.list); | |
32f3c541 | 975 | free(packs.names); |
fe1ed56f | 976 | free(entries); |
a40498a1 DS |
977 | free(pack_perm); |
978 | free(midx_name); | |
a3407730 DS |
979 | return 0; |
980 | } | |
525e18c0 | 981 | |
1dcd9f20 | 982 | void clear_midx_file(struct repository *r) |
525e18c0 | 983 | { |
3b2f8a02 | 984 | char *midx = get_midx_filename(r->objects->odb->path); |
1dcd9f20 DS |
985 | |
986 | if (r->objects && r->objects->multi_pack_index) { | |
987 | close_midx(r->objects->multi_pack_index); | |
988 | r->objects->multi_pack_index = NULL; | |
989 | } | |
525e18c0 DS |
990 | |
991 | if (remove_path(midx)) { | |
992 | UNLEAK(midx); | |
993 | die(_("failed to clear multi-pack-index at %s"), midx); | |
994 | } | |
995 | ||
996 | free(midx); | |
997 | } | |
56ee7ff1 DS |
998 | |
999 | static int verify_midx_error; | |
1000 | ||
d4bf1d88 DS |
1001 | static void midx_report(const char *fmt, ...) |
1002 | { | |
1003 | va_list ap; | |
1004 | verify_midx_error = 1; | |
1005 | va_start(ap, fmt); | |
1006 | vfprintf(stderr, fmt, ap); | |
1007 | fprintf(stderr, "\n"); | |
1008 | va_end(ap); | |
1009 | } | |
1010 | ||
5ae18df9 JH |
1011 | struct pair_pos_vs_id |
1012 | { | |
1013 | uint32_t pos; | |
1014 | uint32_t pack_int_id; | |
1015 | }; | |
1016 | ||
1017 | static int compare_pair_pos_vs_id(const void *_a, const void *_b) | |
1018 | { | |
1019 | struct pair_pos_vs_id *a = (struct pair_pos_vs_id *)_a; | |
1020 | struct pair_pos_vs_id *b = (struct pair_pos_vs_id *)_b; | |
1021 | ||
1022 | return b->pack_int_id - a->pack_int_id; | |
1023 | } | |
1024 | ||
430efb8a JH |
1025 | /* |
1026 | * Limit calls to display_progress() for performance reasons. | |
1027 | * The interval here was arbitrarily chosen. | |
1028 | */ | |
1029 | #define SPARSE_PROGRESS_INTERVAL (1 << 12) | |
1030 | #define midx_display_sparse_progress(progress, n) \ | |
1031 | do { \ | |
1032 | uint64_t _n = (n); \ | |
1033 | if ((_n & (SPARSE_PROGRESS_INTERVAL - 1)) == 0) \ | |
1034 | display_progress(progress, _n); \ | |
1035 | } while (0) | |
1036 | ||
64404a24 | 1037 | int verify_midx_file(struct repository *r, const char *object_dir) |
56ee7ff1 | 1038 | { |
5ae18df9 | 1039 | struct pair_pos_vs_id *pairs = NULL; |
d4bf1d88 | 1040 | uint32_t i; |
17eeb067 | 1041 | struct progress *progress; |
56ee7ff1 DS |
1042 | struct multi_pack_index *m = load_multi_pack_index(object_dir, 1); |
1043 | verify_midx_error = 0; | |
1044 | ||
1045 | if (!m) | |
1046 | return 0; | |
1047 | ||
430efb8a JH |
1048 | progress = start_progress(_("Looking for referenced packfiles"), |
1049 | m->num_packs); | |
d4bf1d88 | 1050 | for (i = 0; i < m->num_packs; i++) { |
64404a24 | 1051 | if (prepare_midx_pack(r, m, i)) |
d4bf1d88 | 1052 | midx_report("failed to load pack in position %d", i); |
430efb8a JH |
1053 | |
1054 | display_progress(progress, i + 1); | |
d4bf1d88 | 1055 | } |
430efb8a | 1056 | stop_progress(&progress); |
d4bf1d88 | 1057 | |
2f23d3f3 DS |
1058 | for (i = 0; i < 255; i++) { |
1059 | uint32_t oid_fanout1 = ntohl(m->chunk_oid_fanout[i]); | |
1060 | uint32_t oid_fanout2 = ntohl(m->chunk_oid_fanout[i + 1]); | |
1061 | ||
1062 | if (oid_fanout1 > oid_fanout2) | |
1063 | midx_report(_("oid fanout out of order: fanout[%d] = %"PRIx32" > %"PRIx32" = fanout[%d]"), | |
1064 | i, oid_fanout1, oid_fanout2, i + 1); | |
1065 | } | |
1066 | ||
430efb8a JH |
1067 | progress = start_sparse_progress(_("Verifying OID order in MIDX"), |
1068 | m->num_objects - 1); | |
55c5648d DS |
1069 | for (i = 0; i < m->num_objects - 1; i++) { |
1070 | struct object_id oid1, oid2; | |
1071 | ||
1072 | nth_midxed_object_oid(&oid1, m, i); | |
1073 | nth_midxed_object_oid(&oid2, m, i + 1); | |
1074 | ||
1075 | if (oidcmp(&oid1, &oid2) >= 0) | |
1076 | midx_report(_("oid lookup out of order: oid[%d] = %s >= %s = oid[%d]"), | |
1077 | i, oid_to_hex(&oid1), oid_to_hex(&oid2), i + 1); | |
430efb8a JH |
1078 | |
1079 | midx_display_sparse_progress(progress, i + 1); | |
55c5648d | 1080 | } |
430efb8a | 1081 | stop_progress(&progress); |
55c5648d | 1082 | |
5ae18df9 JH |
1083 | /* |
1084 | * Create an array mapping each object to its packfile id. Sort it | |
1085 | * to group the objects by packfile. Use this permutation to visit | |
1086 | * each of the objects and only require 1 packfile to be open at a | |
1087 | * time. | |
1088 | */ | |
1089 | ALLOC_ARRAY(pairs, m->num_objects); | |
1090 | for (i = 0; i < m->num_objects; i++) { | |
1091 | pairs[i].pos = i; | |
1092 | pairs[i].pack_int_id = nth_midxed_pack_int_id(m, i); | |
1093 | } | |
1094 | ||
1095 | progress = start_sparse_progress(_("Sorting objects by packfile"), | |
1096 | m->num_objects); | |
1097 | display_progress(progress, 0); /* TODO: Measure QSORT() progress */ | |
1098 | QSORT(pairs, m->num_objects, compare_pair_pos_vs_id); | |
1099 | stop_progress(&progress); | |
1100 | ||
430efb8a | 1101 | progress = start_sparse_progress(_("Verifying object offsets"), m->num_objects); |
cc6af73c DS |
1102 | for (i = 0; i < m->num_objects; i++) { |
1103 | struct object_id oid; | |
1104 | struct pack_entry e; | |
1105 | off_t m_offset, p_offset; | |
1106 | ||
5ae18df9 JH |
1107 | if (i > 0 && pairs[i-1].pack_int_id != pairs[i].pack_int_id && |
1108 | m->packs[pairs[i-1].pack_int_id]) | |
1109 | { | |
1110 | close_pack_fd(m->packs[pairs[i-1].pack_int_id]); | |
1111 | close_pack_index(m->packs[pairs[i-1].pack_int_id]); | |
1112 | } | |
1113 | ||
1114 | nth_midxed_object_oid(&oid, m, pairs[i].pos); | |
1115 | ||
64404a24 | 1116 | if (!fill_midx_entry(r, &oid, &e, m)) { |
cc6af73c | 1117 | midx_report(_("failed to load pack entry for oid[%d] = %s"), |
5ae18df9 | 1118 | pairs[i].pos, oid_to_hex(&oid)); |
cc6af73c DS |
1119 | continue; |
1120 | } | |
1121 | ||
1122 | if (open_pack_index(e.p)) { | |
1123 | midx_report(_("failed to load pack-index for packfile %s"), | |
1124 | e.p->pack_name); | |
1125 | break; | |
1126 | } | |
1127 | ||
1128 | m_offset = e.offset; | |
1129 | p_offset = find_pack_entry_one(oid.hash, e.p); | |
1130 | ||
1131 | if (m_offset != p_offset) | |
1132 | midx_report(_("incorrect object offset for oid[%d] = %s: %"PRIx64" != %"PRIx64), | |
5ae18df9 | 1133 | pairs[i].pos, oid_to_hex(&oid), m_offset, p_offset); |
144d7033 | 1134 | |
430efb8a | 1135 | midx_display_sparse_progress(progress, i + 1); |
cc6af73c | 1136 | } |
144d7033 | 1137 | stop_progress(&progress); |
cc6af73c | 1138 | |
5ae18df9 JH |
1139 | free(pairs); |
1140 | ||
56ee7ff1 DS |
1141 | return verify_midx_error; |
1142 | } |