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Commit | Line | Data |
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2ad9d4cb | 1 | #include "builtin.h" |
9cf6d335 SV |
2 | #include "delta.h" |
3 | #include "pack.h" | |
4 | #include "csum-file.h" | |
8e440259 PE |
5 | #include "blob.h" |
6 | #include "commit.h" | |
7 | #include "tag.h" | |
8 | #include "tree.h" | |
96a02f8f | 9 | #include "progress.h" |
0153be05 | 10 | #include "fsck.h" |
2fb3f6db | 11 | #include "exec_cmd.h" |
4614043c | 12 | #include "streaming.h" |
b8a2486f | 13 | #include "thread-utils.h" |
9cf6d335 SV |
14 | |
15 | static const char index_pack_usage[] = | |
e337a04d | 16 | "git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--verify] [--strict] (<pack-file> | --stdin [--fix-thin] [<pack-file>])"; |
9cf6d335 | 17 | |
9cba13ca | 18 | struct object_entry { |
aa7e44bf | 19 | struct pack_idx_entry idx; |
2d477051 | 20 | unsigned long size; |
41730576 NTND |
21 | unsigned char hdr_size; |
22 | signed char type; | |
23 | signed char real_type; | |
9cf6d335 SV |
24 | }; |
25 | ||
41730576 | 26 | struct object_stat { |
38a45561 JH |
27 | unsigned delta_depth; |
28 | int base_object_no; | |
53dda6ff NP |
29 | }; |
30 | ||
f41aebd4 | 31 | struct base_data { |
4a438cab SP |
32 | struct base_data *base; |
33 | struct base_data *child; | |
03993e13 | 34 | struct object_entry *obj; |
f41aebd4 SP |
35 | void *data; |
36 | unsigned long size; | |
2baad220 NTND |
37 | int ref_first, ref_last; |
38 | int ofs_first, ofs_last; | |
f41aebd4 SP |
39 | }; |
40 | ||
b8a2486f NTND |
41 | struct thread_local { |
42 | #ifndef NO_PTHREADS | |
43 | pthread_t thread; | |
44 | #endif | |
45 | struct base_data *base_cache; | |
46 | size_t base_cache_used; | |
39539495 | 47 | int pack_fd; |
b8a2486f NTND |
48 | }; |
49 | ||
0153be05 MK |
50 | #define FLAG_LINK (1u<<20) |
51 | #define FLAG_CHECKED (1u<<21) | |
52 | ||
c6458e60 NTND |
53 | struct ofs_delta_entry { |
54 | off_t offset; | |
55 | int obj_no; | |
56 | }; | |
57 | ||
58 | struct ref_delta_entry { | |
59 | unsigned char sha1[20]; | |
636171cb | 60 | int obj_no; |
9cf6d335 SV |
61 | }; |
62 | ||
9cf6d335 | 63 | static struct object_entry *objects; |
41730576 | 64 | static struct object_stat *obj_stat; |
c6458e60 NTND |
65 | static struct ofs_delta_entry *ofs_deltas; |
66 | static struct ref_delta_entry *ref_deltas; | |
b8a2486f | 67 | static struct thread_local nothread_data; |
9cf6d335 | 68 | static int nr_objects; |
c6458e60 NTND |
69 | static int nr_ofs_deltas; |
70 | static int nr_ref_deltas; | |
71 | static int ref_deltas_alloc; | |
636171cb | 72 | static int nr_resolved_deltas; |
b8a2486f | 73 | static int nr_threads; |
9cf6d335 | 74 | |
e42797f5 | 75 | static int from_stdin; |
0153be05 | 76 | static int strict; |
c6807a40 | 77 | static int do_fsck_object; |
22410549 | 78 | static struct fsck_options fsck_options = FSCK_OPTIONS_STRICT; |
3c9af366 | 79 | static int verbose; |
3aba2fdd | 80 | static int show_stat; |
c6807a40 | 81 | static int check_self_contained_and_connected; |
3c9af366 | 82 | |
dc6a0757 | 83 | static struct progress *progress; |
e42797f5 | 84 | |
2d477051 NP |
85 | /* We always read in 4kB chunks. */ |
86 | static unsigned char input_buffer[4096]; | |
d7dd0223 NP |
87 | static unsigned int input_offset, input_len; |
88 | static off_t consumed_bytes; | |
d1a0ed18 | 89 | static unsigned deepest_delta; |
9126f009 | 90 | static git_SHA_CTX input_ctx; |
ee5743ce | 91 | static uint32_t input_crc32; |
39539495 NTND |
92 | static int input_fd, output_fd; |
93 | static const char *curr_pack; | |
2d477051 | 94 | |
b8a2486f NTND |
95 | #ifndef NO_PTHREADS |
96 | ||
97 | static struct thread_local *thread_data; | |
98 | static int nr_dispatched; | |
99 | static int threads_active; | |
100 | ||
101 | static pthread_mutex_t read_mutex; | |
102 | #define read_lock() lock_mutex(&read_mutex) | |
103 | #define read_unlock() unlock_mutex(&read_mutex) | |
104 | ||
105 | static pthread_mutex_t counter_mutex; | |
106 | #define counter_lock() lock_mutex(&counter_mutex) | |
107 | #define counter_unlock() unlock_mutex(&counter_mutex) | |
108 | ||
109 | static pthread_mutex_t work_mutex; | |
110 | #define work_lock() lock_mutex(&work_mutex) | |
111 | #define work_unlock() unlock_mutex(&work_mutex) | |
112 | ||
3aba2fdd NTND |
113 | static pthread_mutex_t deepest_delta_mutex; |
114 | #define deepest_delta_lock() lock_mutex(&deepest_delta_mutex) | |
115 | #define deepest_delta_unlock() unlock_mutex(&deepest_delta_mutex) | |
116 | ||
ab791dd1 JK |
117 | static pthread_mutex_t type_cas_mutex; |
118 | #define type_cas_lock() lock_mutex(&type_cas_mutex) | |
119 | #define type_cas_unlock() unlock_mutex(&type_cas_mutex) | |
120 | ||
b8a2486f NTND |
121 | static pthread_key_t key; |
122 | ||
123 | static inline void lock_mutex(pthread_mutex_t *mutex) | |
124 | { | |
125 | if (threads_active) | |
126 | pthread_mutex_lock(mutex); | |
127 | } | |
128 | ||
129 | static inline void unlock_mutex(pthread_mutex_t *mutex) | |
130 | { | |
131 | if (threads_active) | |
132 | pthread_mutex_unlock(mutex); | |
133 | } | |
134 | ||
135 | /* | |
136 | * Mutex and conditional variable can't be statically-initialized on Windows. | |
137 | */ | |
138 | static void init_thread(void) | |
139 | { | |
39539495 | 140 | int i; |
b8a2486f NTND |
141 | init_recursive_mutex(&read_mutex); |
142 | pthread_mutex_init(&counter_mutex, NULL); | |
143 | pthread_mutex_init(&work_mutex, NULL); | |
ab791dd1 | 144 | pthread_mutex_init(&type_cas_mutex, NULL); |
3aba2fdd NTND |
145 | if (show_stat) |
146 | pthread_mutex_init(&deepest_delta_mutex, NULL); | |
b8a2486f NTND |
147 | pthread_key_create(&key, NULL); |
148 | thread_data = xcalloc(nr_threads, sizeof(*thread_data)); | |
39539495 NTND |
149 | for (i = 0; i < nr_threads; i++) { |
150 | thread_data[i].pack_fd = open(curr_pack, O_RDONLY); | |
151 | if (thread_data[i].pack_fd == -1) | |
152 | die_errno(_("unable to open %s"), curr_pack); | |
153 | } | |
154 | ||
b8a2486f NTND |
155 | threads_active = 1; |
156 | } | |
157 | ||
158 | static void cleanup_thread(void) | |
159 | { | |
39539495 | 160 | int i; |
b8a2486f NTND |
161 | if (!threads_active) |
162 | return; | |
163 | threads_active = 0; | |
164 | pthread_mutex_destroy(&read_mutex); | |
165 | pthread_mutex_destroy(&counter_mutex); | |
166 | pthread_mutex_destroy(&work_mutex); | |
ab791dd1 | 167 | pthread_mutex_destroy(&type_cas_mutex); |
3aba2fdd NTND |
168 | if (show_stat) |
169 | pthread_mutex_destroy(&deepest_delta_mutex); | |
39539495 NTND |
170 | for (i = 0; i < nr_threads; i++) |
171 | close(thread_data[i].pack_fd); | |
b8a2486f NTND |
172 | pthread_key_delete(key); |
173 | free(thread_data); | |
174 | } | |
175 | ||
176 | #else | |
177 | ||
178 | #define read_lock() | |
179 | #define read_unlock() | |
180 | ||
181 | #define counter_lock() | |
182 | #define counter_unlock() | |
183 | ||
184 | #define work_lock() | |
185 | #define work_unlock() | |
186 | ||
3aba2fdd NTND |
187 | #define deepest_delta_lock() |
188 | #define deepest_delta_unlock() | |
189 | ||
e0e21283 EB |
190 | #define type_cas_lock() |
191 | #define type_cas_unlock() | |
192 | ||
b8a2486f NTND |
193 | #endif |
194 | ||
195 | ||
22410549 | 196 | static int mark_link(struct object *obj, int type, void *data, struct fsck_options *options) |
0153be05 MK |
197 | { |
198 | if (!obj) | |
199 | return -1; | |
200 | ||
201 | if (type != OBJ_ANY && obj->type != type) | |
f2fd0760 | 202 | die(_("object type mismatch at %s"), oid_to_hex(&obj->oid)); |
0153be05 MK |
203 | |
204 | obj->flags |= FLAG_LINK; | |
205 | return 0; | |
206 | } | |
207 | ||
208 | /* The content of each linked object must have been checked | |
209 | or it must be already present in the object database */ | |
c6807a40 | 210 | static unsigned check_object(struct object *obj) |
0153be05 MK |
211 | { |
212 | if (!obj) | |
c6807a40 | 213 | return 0; |
0153be05 MK |
214 | |
215 | if (!(obj->flags & FLAG_LINK)) | |
c6807a40 | 216 | return 0; |
0153be05 MK |
217 | |
218 | if (!(obj->flags & FLAG_CHECKED)) { | |
219 | unsigned long size; | |
7999b2cf | 220 | int type = sha1_object_info(get_object_hash(*obj), &size); |
77583e77 JK |
221 | if (type <= 0) |
222 | die(_("did not receive expected object %s"), | |
f2fd0760 | 223 | oid_to_hex(&obj->oid)); |
77583e77 JK |
224 | if (type != obj->type) |
225 | die(_("object %s: expected type %s, found %s"), | |
f2fd0760 | 226 | oid_to_hex(&obj->oid), |
77583e77 | 227 | typename(obj->type), typename(type)); |
0153be05 | 228 | obj->flags |= FLAG_CHECKED; |
c6807a40 | 229 | return 1; |
0153be05 | 230 | } |
c6807a40 NTND |
231 | |
232 | return 0; | |
0153be05 MK |
233 | } |
234 | ||
c6807a40 | 235 | static unsigned check_objects(void) |
0153be05 | 236 | { |
c6807a40 | 237 | unsigned i, max, foreign_nr = 0; |
0153be05 MK |
238 | |
239 | max = get_max_object_index(); | |
240 | for (i = 0; i < max; i++) | |
c6807a40 NTND |
241 | foreign_nr += check_object(get_indexed_object(i)); |
242 | return foreign_nr; | |
0153be05 MK |
243 | } |
244 | ||
245 | ||
636171cb | 246 | /* Discard current buffer used content. */ |
a6e8a767 | 247 | static void flush(void) |
636171cb NP |
248 | { |
249 | if (input_offset) { | |
250 | if (output_fd >= 0) | |
251 | write_or_die(output_fd, input_buffer, input_offset); | |
9126f009 | 252 | git_SHA1_Update(&input_ctx, input_buffer, input_offset); |
554a2636 | 253 | memmove(input_buffer, input_buffer + input_offset, input_len); |
636171cb NP |
254 | input_offset = 0; |
255 | } | |
256 | } | |
257 | ||
2d477051 NP |
258 | /* |
259 | * Make sure at least "min" bytes are available in the buffer, and | |
260 | * return the pointer to the buffer. | |
261 | */ | |
b89c4e93 | 262 | static void *fill(int min) |
9cf6d335 | 263 | { |
2d477051 NP |
264 | if (min <= input_len) |
265 | return input_buffer + input_offset; | |
266 | if (min > sizeof(input_buffer)) | |
c2b97ecf NTND |
267 | die(Q_("cannot fill %d byte", |
268 | "cannot fill %d bytes", | |
269 | min), | |
270 | min); | |
636171cb | 271 | flush(); |
2d477051 | 272 | do { |
8a912bcb | 273 | ssize_t ret = xread(input_fd, input_buffer + input_len, |
2d477051 NP |
274 | sizeof(input_buffer) - input_len); |
275 | if (ret <= 0) { | |
276 | if (!ret) | |
c2b97ecf NTND |
277 | die(_("early EOF")); |
278 | die_errno(_("read error on input")); | |
2d477051 NP |
279 | } |
280 | input_len += ret; | |
218558af NP |
281 | if (from_stdin) |
282 | display_throughput(progress, consumed_bytes + input_len); | |
2d477051 NP |
283 | } while (input_len < min); |
284 | return input_buffer; | |
285 | } | |
286 | ||
287 | static void use(int bytes) | |
288 | { | |
289 | if (bytes > input_len) | |
c2b97ecf | 290 | die(_("used more bytes than were available")); |
ee5743ce | 291 | input_crc32 = crc32(input_crc32, input_buffer + input_offset, bytes); |
2d477051 NP |
292 | input_len -= bytes; |
293 | input_offset += bytes; | |
d7dd0223 NP |
294 | |
295 | /* make sure off_t is sufficiently large not to wrap */ | |
c03c8315 | 296 | if (signed_add_overflows(consumed_bytes, bytes)) |
c2b97ecf | 297 | die(_("pack too large for current definition of off_t")); |
2d477051 NP |
298 | consumed_bytes += bytes; |
299 | } | |
9cf6d335 | 300 | |
3bb72562 | 301 | static const char *open_pack_file(const char *pack_name) |
2d477051 | 302 | { |
e42797f5 NP |
303 | if (from_stdin) { |
304 | input_fd = 0; | |
305 | if (!pack_name) { | |
ab1900a3 ÆAB |
306 | static char tmp_file[PATH_MAX]; |
307 | output_fd = odb_mkstemp(tmp_file, sizeof(tmp_file), | |
6e180cdc | 308 | "pack/tmp_pack_XXXXXX"); |
ab1900a3 | 309 | pack_name = xstrdup(tmp_file); |
e42797f5 NP |
310 | } else |
311 | output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600); | |
312 | if (output_fd < 0) | |
c2b97ecf | 313 | die_errno(_("unable to create '%s'"), pack_name); |
39539495 | 314 | nothread_data.pack_fd = output_fd; |
e42797f5 NP |
315 | } else { |
316 | input_fd = open(pack_name, O_RDONLY); | |
317 | if (input_fd < 0) | |
c2b97ecf | 318 | die_errno(_("cannot open packfile '%s'"), pack_name); |
e42797f5 | 319 | output_fd = -1; |
39539495 | 320 | nothread_data.pack_fd = input_fd; |
e42797f5 | 321 | } |
9126f009 | 322 | git_SHA1_Init(&input_ctx); |
e42797f5 | 323 | return pack_name; |
9cf6d335 SV |
324 | } |
325 | ||
326 | static void parse_pack_header(void) | |
327 | { | |
2d477051 | 328 | struct pack_header *hdr = fill(sizeof(struct pack_header)); |
9cf6d335 SV |
329 | |
330 | /* Header consistency check */ | |
9cf6d335 | 331 | if (hdr->hdr_signature != htonl(PACK_SIGNATURE)) |
c2b97ecf | 332 | die(_("pack signature mismatch")); |
d60fc1c8 | 333 | if (!pack_version_ok(hdr->hdr_version)) |
f350df42 | 334 | die(_("pack version %"PRIu32" unsupported"), |
6e1c2344 | 335 | ntohl(hdr->hdr_version)); |
9cf6d335 SV |
336 | |
337 | nr_objects = ntohl(hdr->hdr_entries); | |
2d477051 | 338 | use(sizeof(struct pack_header)); |
9cf6d335 SV |
339 | } |
340 | ||
a4f3131c EFL |
341 | static NORETURN void bad_object(unsigned long offset, const char *format, |
342 | ...) __attribute__((format (printf, 2, 3))); | |
9cf6d335 | 343 | |
c2e86add | 344 | static NORETURN void bad_object(unsigned long offset, const char *format, ...) |
9cf6d335 SV |
345 | { |
346 | va_list params; | |
347 | char buf[1024]; | |
348 | ||
349 | va_start(params, format); | |
350 | vsnprintf(buf, sizeof(buf), format, params); | |
351 | va_end(params); | |
c2b97ecf | 352 | die(_("pack has bad object at offset %lu: %s"), offset, buf); |
9cf6d335 SV |
353 | } |
354 | ||
b8a2486f NTND |
355 | static inline struct thread_local *get_thread_data(void) |
356 | { | |
357 | #ifndef NO_PTHREADS | |
358 | if (threads_active) | |
359 | return pthread_getspecific(key); | |
360 | assert(!threads_active && | |
361 | "This should only be reached when all threads are gone"); | |
362 | #endif | |
363 | return ¬hread_data; | |
364 | } | |
365 | ||
366 | #ifndef NO_PTHREADS | |
367 | static void set_thread_data(struct thread_local *data) | |
368 | { | |
369 | if (threads_active) | |
370 | pthread_setspecific(key, data); | |
371 | } | |
372 | #endif | |
373 | ||
2baad220 NTND |
374 | static struct base_data *alloc_base_data(void) |
375 | { | |
51a60f5b | 376 | struct base_data *base = xcalloc(1, sizeof(struct base_data)); |
2baad220 NTND |
377 | base->ref_last = -1; |
378 | base->ofs_last = -1; | |
379 | return base; | |
380 | } | |
381 | ||
6a87ed97 NP |
382 | static void free_base_data(struct base_data *c) |
383 | { | |
384 | if (c->data) { | |
385 | free(c->data); | |
386 | c->data = NULL; | |
b8a2486f | 387 | get_thread_data()->base_cache_used -= c->size; |
6a87ed97 NP |
388 | } |
389 | } | |
390 | ||
92392b4a SP |
391 | static void prune_base_data(struct base_data *retain) |
392 | { | |
8e24cbae | 393 | struct base_data *b; |
b8a2486f NTND |
394 | struct thread_local *data = get_thread_data(); |
395 | for (b = data->base_cache; | |
396 | data->base_cache_used > delta_base_cache_limit && b; | |
92392b4a | 397 | b = b->child) { |
6a87ed97 NP |
398 | if (b->data && b != retain) |
399 | free_base_data(b); | |
92392b4a SP |
400 | } |
401 | } | |
402 | ||
4a438cab SP |
403 | static void link_base_data(struct base_data *base, struct base_data *c) |
404 | { | |
405 | if (base) | |
406 | base->child = c; | |
407 | else | |
b8a2486f | 408 | get_thread_data()->base_cache = c; |
4a438cab SP |
409 | |
410 | c->base = base; | |
411 | c->child = NULL; | |
9441b61d | 412 | if (c->data) |
b8a2486f | 413 | get_thread_data()->base_cache_used += c->size; |
92392b4a | 414 | prune_base_data(c); |
4a438cab SP |
415 | } |
416 | ||
417 | static void unlink_base_data(struct base_data *c) | |
418 | { | |
419 | struct base_data *base = c->base; | |
420 | if (base) | |
421 | base->child = NULL; | |
422 | else | |
b8a2486f | 423 | get_thread_data()->base_cache = NULL; |
6a87ed97 | 424 | free_base_data(c); |
4a438cab SP |
425 | } |
426 | ||
681b07de NTND |
427 | static int is_delta_type(enum object_type type) |
428 | { | |
429 | return (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA); | |
430 | } | |
431 | ||
432 | static void *unpack_entry_data(unsigned long offset, unsigned long size, | |
433 | enum object_type type, unsigned char *sha1) | |
9cf6d335 | 434 | { |
9ec2dde9 | 435 | static char fixed_buf[8192]; |
7ce4721a | 436 | int status; |
ef49a7a0 | 437 | git_zstream stream; |
9ec2dde9 | 438 | void *buf; |
681b07de NTND |
439 | git_SHA_CTX c; |
440 | char hdr[32]; | |
441 | int hdrlen; | |
442 | ||
443 | if (!is_delta_type(type)) { | |
ef1286d3 | 444 | hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(type), size) + 1; |
681b07de NTND |
445 | git_SHA1_Init(&c); |
446 | git_SHA1_Update(&c, hdr, hdrlen); | |
447 | } else | |
448 | sha1 = NULL; | |
9ec2dde9 NTND |
449 | if (type == OBJ_BLOB && size > big_file_threshold) |
450 | buf = fixed_buf; | |
451 | else | |
a1e920a0 | 452 | buf = xmallocz(size); |
9cf6d335 SV |
453 | |
454 | memset(&stream, 0, sizeof(stream)); | |
7ce4721a | 455 | git_inflate_init(&stream); |
9cf6d335 | 456 | stream.next_out = buf; |
9ec2dde9 | 457 | stream.avail_out = buf == fixed_buf ? sizeof(fixed_buf) : size; |
9cf6d335 | 458 | |
7ce4721a | 459 | do { |
681b07de | 460 | unsigned char *last_out = stream.next_out; |
2d477051 NP |
461 | stream.next_in = fill(1); |
462 | stream.avail_in = input_len; | |
7ce4721a NP |
463 | status = git_inflate(&stream, 0); |
464 | use(input_len - stream.avail_in); | |
681b07de NTND |
465 | if (sha1) |
466 | git_SHA1_Update(&c, last_out, stream.next_out - last_out); | |
9ec2dde9 NTND |
467 | if (buf == fixed_buf) { |
468 | stream.next_out = buf; | |
469 | stream.avail_out = sizeof(fixed_buf); | |
470 | } | |
7ce4721a NP |
471 | } while (status == Z_OK); |
472 | if (stream.total_out != size || status != Z_STREAM_END) | |
c2b97ecf | 473 | bad_object(offset, _("inflate returned %d"), status); |
39c68542 | 474 | git_inflate_end(&stream); |
681b07de NTND |
475 | if (sha1) |
476 | git_SHA1_Final(sha1, &c); | |
9ec2dde9 | 477 | return buf == fixed_buf ? NULL : buf; |
9cf6d335 SV |
478 | } |
479 | ||
681b07de | 480 | static void *unpack_raw_entry(struct object_entry *obj, |
c6458e60 NTND |
481 | off_t *ofs_offset, |
482 | unsigned char *ref_sha1, | |
681b07de | 483 | unsigned char *sha1) |
9cf6d335 | 484 | { |
48fb7deb LT |
485 | unsigned char *p; |
486 | unsigned long size, c; | |
d7dd0223 | 487 | off_t base_offset; |
9cf6d335 | 488 | unsigned shift; |
ee5743ce | 489 | void *data; |
9cf6d335 | 490 | |
aa7e44bf | 491 | obj->idx.offset = consumed_bytes; |
1e4cd68c | 492 | input_crc32 = crc32(0, NULL, 0); |
2d477051 NP |
493 | |
494 | p = fill(1); | |
495 | c = *p; | |
496 | use(1); | |
497 | obj->type = (c >> 4) & 7; | |
9cf6d335 SV |
498 | size = (c & 15); |
499 | shift = 4; | |
500 | while (c & 0x80) { | |
2d477051 NP |
501 | p = fill(1); |
502 | c = *p; | |
503 | use(1); | |
48fb7deb | 504 | size += (c & 0x7f) << shift; |
9cf6d335 SV |
505 | shift += 7; |
506 | } | |
2d477051 | 507 | obj->size = size; |
9cf6d335 | 508 | |
2d477051 | 509 | switch (obj->type) { |
eb32d236 | 510 | case OBJ_REF_DELTA: |
c6458e60 | 511 | hashcpy(ref_sha1, fill(20)); |
2d477051 | 512 | use(20); |
53dda6ff NP |
513 | break; |
514 | case OBJ_OFS_DELTA: | |
2d477051 NP |
515 | p = fill(1); |
516 | c = *p; | |
517 | use(1); | |
53dda6ff NP |
518 | base_offset = c & 127; |
519 | while (c & 128) { | |
520 | base_offset += 1; | |
8723f216 | 521 | if (!base_offset || MSB(base_offset, 7)) |
c2b97ecf | 522 | bad_object(obj->idx.offset, _("offset value overflow for delta base object")); |
2d477051 NP |
523 | p = fill(1); |
524 | c = *p; | |
525 | use(1); | |
53dda6ff NP |
526 | base_offset = (base_offset << 7) + (c & 127); |
527 | } | |
c6458e60 NTND |
528 | *ofs_offset = obj->idx.offset - base_offset; |
529 | if (*ofs_offset <= 0 || *ofs_offset >= obj->idx.offset) | |
c2b97ecf | 530 | bad_object(obj->idx.offset, _("delta base offset is out of bound")); |
53dda6ff | 531 | break; |
9cf6d335 SV |
532 | case OBJ_COMMIT: |
533 | case OBJ_TREE: | |
534 | case OBJ_BLOB: | |
535 | case OBJ_TAG: | |
9cf6d335 SV |
536 | break; |
537 | default: | |
c2b97ecf | 538 | bad_object(obj->idx.offset, _("unknown object type %d"), obj->type); |
9cf6d335 | 539 | } |
aa7e44bf | 540 | obj->hdr_size = consumed_bytes - obj->idx.offset; |
2d477051 | 541 | |
681b07de | 542 | data = unpack_entry_data(obj->idx.offset, obj->size, obj->type, sha1); |
aa7e44bf | 543 | obj->idx.crc32 = input_crc32; |
ee5743ce | 544 | return data; |
2d477051 NP |
545 | } |
546 | ||
8a2e163c NTND |
547 | static void *unpack_data(struct object_entry *obj, |
548 | int (*consume)(const unsigned char *, unsigned long, void *), | |
549 | void *cb_data) | |
2d477051 | 550 | { |
a91ef6e7 | 551 | off_t from = obj[0].idx.offset + obj[0].hdr_size; |
aa7e44bf | 552 | unsigned long len = obj[1].idx.offset - from; |
776ea370 | 553 | unsigned char *data, *inbuf; |
ef49a7a0 | 554 | git_zstream stream; |
776ea370 | 555 | int status; |
9cf6d335 | 556 | |
a1e920a0 | 557 | data = xmallocz(consume ? 64*1024 : obj->size); |
776ea370 NP |
558 | inbuf = xmalloc((len < 64*1024) ? len : 64*1024); |
559 | ||
2d477051 | 560 | memset(&stream, 0, sizeof(stream)); |
776ea370 | 561 | git_inflate_init(&stream); |
2d477051 | 562 | stream.next_out = data; |
8a2e163c | 563 | stream.avail_out = consume ? 64*1024 : obj->size; |
776ea370 NP |
564 | |
565 | do { | |
566 | ssize_t n = (len < 64*1024) ? len : 64*1024; | |
53f52cd9 | 567 | n = xpread(get_thread_data()->pack_fd, inbuf, n, from); |
776ea370 | 568 | if (n < 0) |
c2b97ecf | 569 | die_errno(_("cannot pread pack file")); |
776ea370 | 570 | if (!n) |
c2b97ecf NTND |
571 | die(Q_("premature end of pack file, %lu byte missing", |
572 | "premature end of pack file, %lu bytes missing", | |
573 | len), | |
574 | len); | |
776ea370 NP |
575 | from += n; |
576 | len -= n; | |
577 | stream.next_in = inbuf; | |
578 | stream.avail_in = n; | |
f8b09038 JK |
579 | if (!consume) |
580 | status = git_inflate(&stream, 0); | |
581 | else { | |
582 | do { | |
583 | status = git_inflate(&stream, 0); | |
584 | if (consume(data, stream.next_out - data, cb_data)) { | |
585 | free(inbuf); | |
586 | free(data); | |
587 | return NULL; | |
588 | } | |
589 | stream.next_out = data; | |
590 | stream.avail_out = 64*1024; | |
591 | } while (status == Z_OK && stream.avail_in); | |
8a2e163c | 592 | } |
776ea370 NP |
593 | } while (len && status == Z_OK && !stream.avail_in); |
594 | ||
595 | /* This has been inflated OK when first encountered, so... */ | |
596 | if (status != Z_STREAM_END || stream.total_out != obj->size) | |
c2b97ecf | 597 | die(_("serious inflate inconsistency")); |
776ea370 NP |
598 | |
599 | git_inflate_end(&stream); | |
600 | free(inbuf); | |
8a2e163c NTND |
601 | if (consume) { |
602 | free(data); | |
603 | data = NULL; | |
604 | } | |
9cf6d335 SV |
605 | return data; |
606 | } | |
607 | ||
8a2e163c NTND |
608 | static void *get_data_from_pack(struct object_entry *obj) |
609 | { | |
610 | return unpack_data(obj, NULL, NULL); | |
611 | } | |
612 | ||
c6458e60 NTND |
613 | static int compare_ofs_delta_bases(off_t offset1, off_t offset2, |
614 | enum object_type type1, | |
615 | enum object_type type2) | |
7218a215 JH |
616 | { |
617 | int cmp = type1 - type2; | |
618 | if (cmp) | |
619 | return cmp; | |
f0e7f11d JK |
620 | return offset1 < offset2 ? -1 : |
621 | offset1 > offset2 ? 1 : | |
622 | 0; | |
7218a215 JH |
623 | } |
624 | ||
c6458e60 | 625 | static int find_ofs_delta(const off_t offset, enum object_type type) |
9cf6d335 | 626 | { |
c6458e60 NTND |
627 | int first = 0, last = nr_ofs_deltas; |
628 | ||
629 | while (first < last) { | |
630 | int next = (first + last) / 2; | |
631 | struct ofs_delta_entry *delta = &ofs_deltas[next]; | |
632 | int cmp; | |
633 | ||
634 | cmp = compare_ofs_delta_bases(offset, delta->offset, | |
635 | type, objects[delta->obj_no].type); | |
636 | if (!cmp) | |
637 | return next; | |
638 | if (cmp < 0) { | |
639 | last = next; | |
640 | continue; | |
641 | } | |
642 | first = next+1; | |
643 | } | |
644 | return -first-1; | |
9cf6d335 SV |
645 | } |
646 | ||
c6458e60 NTND |
647 | static void find_ofs_delta_children(off_t offset, |
648 | int *first_index, int *last_index, | |
649 | enum object_type type) | |
9cf6d335 | 650 | { |
c6458e60 | 651 | int first = find_ofs_delta(offset, type); |
9cf6d335 | 652 | int last = first; |
c6458e60 | 653 | int end = nr_ofs_deltas - 1; |
9cf6d335 | 654 | |
6a87ed97 NP |
655 | if (first < 0) { |
656 | *first_index = 0; | |
657 | *last_index = -1; | |
658 | return; | |
659 | } | |
c6458e60 | 660 | while (first > 0 && ofs_deltas[first - 1].offset == offset) |
9cf6d335 | 661 | --first; |
c6458e60 NTND |
662 | while (last < end && ofs_deltas[last + 1].offset == offset) |
663 | ++last; | |
664 | *first_index = first; | |
665 | *last_index = last; | |
666 | } | |
667 | ||
668 | static int compare_ref_delta_bases(const unsigned char *sha1, | |
669 | const unsigned char *sha2, | |
670 | enum object_type type1, | |
671 | enum object_type type2) | |
672 | { | |
673 | int cmp = type1 - type2; | |
674 | if (cmp) | |
675 | return cmp; | |
676 | return hashcmp(sha1, sha2); | |
677 | } | |
678 | ||
679 | static int find_ref_delta(const unsigned char *sha1, enum object_type type) | |
680 | { | |
681 | int first = 0, last = nr_ref_deltas; | |
682 | ||
683 | while (first < last) { | |
684 | int next = (first + last) / 2; | |
685 | struct ref_delta_entry *delta = &ref_deltas[next]; | |
686 | int cmp; | |
687 | ||
688 | cmp = compare_ref_delta_bases(sha1, delta->sha1, | |
689 | type, objects[delta->obj_no].type); | |
690 | if (!cmp) | |
691 | return next; | |
692 | if (cmp < 0) { | |
693 | last = next; | |
694 | continue; | |
695 | } | |
696 | first = next+1; | |
697 | } | |
698 | return -first-1; | |
699 | } | |
700 | ||
701 | static void find_ref_delta_children(const unsigned char *sha1, | |
702 | int *first_index, int *last_index, | |
703 | enum object_type type) | |
704 | { | |
705 | int first = find_ref_delta(sha1, type); | |
706 | int last = first; | |
707 | int end = nr_ref_deltas - 1; | |
708 | ||
709 | if (first < 0) { | |
710 | *first_index = 0; | |
711 | *last_index = -1; | |
712 | return; | |
713 | } | |
714 | while (first > 0 && !hashcmp(ref_deltas[first - 1].sha1, sha1)) | |
715 | --first; | |
716 | while (last < end && !hashcmp(ref_deltas[last + 1].sha1, sha1)) | |
9cf6d335 SV |
717 | ++last; |
718 | *first_index = first; | |
719 | *last_index = last; | |
9cf6d335 SV |
720 | } |
721 | ||
4614043c NTND |
722 | struct compare_data { |
723 | struct object_entry *entry; | |
724 | struct git_istream *st; | |
725 | unsigned char *buf; | |
726 | unsigned long buf_size; | |
727 | }; | |
728 | ||
729 | static int compare_objects(const unsigned char *buf, unsigned long size, | |
730 | void *cb_data) | |
731 | { | |
732 | struct compare_data *data = cb_data; | |
733 | ||
734 | if (data->buf_size < size) { | |
735 | free(data->buf); | |
736 | data->buf = xmalloc(size); | |
737 | data->buf_size = size; | |
738 | } | |
739 | ||
740 | while (size) { | |
741 | ssize_t len = read_istream(data->st, data->buf, size); | |
742 | if (len == 0) | |
743 | die(_("SHA1 COLLISION FOUND WITH %s !"), | |
744 | sha1_to_hex(data->entry->idx.sha1)); | |
745 | if (len < 0) | |
746 | die(_("unable to read %s"), | |
747 | sha1_to_hex(data->entry->idx.sha1)); | |
748 | if (memcmp(buf, data->buf, len)) | |
749 | die(_("SHA1 COLLISION FOUND WITH %s !"), | |
750 | sha1_to_hex(data->entry->idx.sha1)); | |
751 | size -= len; | |
752 | buf += len; | |
753 | } | |
754 | return 0; | |
755 | } | |
756 | ||
757 | static int check_collison(struct object_entry *entry) | |
758 | { | |
759 | struct compare_data data; | |
760 | enum object_type type; | |
761 | unsigned long size; | |
762 | ||
763 | if (entry->size <= big_file_threshold || entry->type != OBJ_BLOB) | |
764 | return -1; | |
765 | ||
766 | memset(&data, 0, sizeof(data)); | |
767 | data.entry = entry; | |
768 | data.st = open_istream(entry->idx.sha1, &type, &size, NULL); | |
769 | if (!data.st) | |
770 | return -1; | |
771 | if (size != entry->size || type != entry->type) | |
772 | die(_("SHA1 COLLISION FOUND WITH %s !"), | |
773 | sha1_to_hex(entry->idx.sha1)); | |
774 | unpack_data(entry, compare_objects, &data); | |
775 | close_istream(data.st); | |
776 | free(data.buf); | |
777 | return 0; | |
778 | } | |
779 | ||
9ec2dde9 NTND |
780 | static void sha1_object(const void *data, struct object_entry *obj_entry, |
781 | unsigned long size, enum object_type type, | |
782 | const unsigned char *sha1) | |
9cf6d335 | 783 | { |
9ec2dde9 | 784 | void *new_data = NULL; |
4614043c | 785 | int collision_test_needed; |
9ec2dde9 NTND |
786 | |
787 | assert(data || obj_entry); | |
788 | ||
b8a2486f | 789 | read_lock(); |
0eeb077b | 790 | collision_test_needed = has_sha1_file_with_flags(sha1, HAS_SHA1_QUICK); |
4614043c NTND |
791 | read_unlock(); |
792 | ||
793 | if (collision_test_needed && !data) { | |
794 | read_lock(); | |
795 | if (!check_collison(obj_entry)) | |
796 | collision_test_needed = 0; | |
797 | read_unlock(); | |
798 | } | |
799 | if (collision_test_needed) { | |
8685da42 NP |
800 | void *has_data; |
801 | enum object_type has_type; | |
802 | unsigned long has_size; | |
4614043c NTND |
803 | read_lock(); |
804 | has_type = sha1_object_info(sha1, &has_size); | |
805 | if (has_type != type || has_size != size) | |
806 | die(_("SHA1 COLLISION FOUND WITH %s !"), sha1_to_hex(sha1)); | |
8685da42 | 807 | has_data = read_sha1_file(sha1, &has_type, &has_size); |
b8a2486f | 808 | read_unlock(); |
4614043c NTND |
809 | if (!data) |
810 | data = new_data = get_data_from_pack(obj_entry); | |
8685da42 | 811 | if (!has_data) |
c2b97ecf | 812 | die(_("cannot read existing object %s"), sha1_to_hex(sha1)); |
8685da42 NP |
813 | if (size != has_size || type != has_type || |
814 | memcmp(data, has_data, size) != 0) | |
c2b97ecf | 815 | die(_("SHA1 COLLISION FOUND WITH %s !"), sha1_to_hex(sha1)); |
bbf4b41b | 816 | free(has_data); |
4614043c | 817 | } |
b8a2486f | 818 | |
0153be05 | 819 | if (strict) { |
b8a2486f | 820 | read_lock(); |
0153be05 MK |
821 | if (type == OBJ_BLOB) { |
822 | struct blob *blob = lookup_blob(sha1); | |
823 | if (blob) | |
824 | blob->object.flags |= FLAG_CHECKED; | |
825 | else | |
c2b97ecf | 826 | die(_("invalid blob object %s"), sha1_to_hex(sha1)); |
0153be05 MK |
827 | } else { |
828 | struct object *obj; | |
829 | int eaten; | |
830 | void *buf = (void *) data; | |
831 | ||
920734b0 | 832 | assert(data && "data can only be NULL for large _blobs_"); |
9ec2dde9 | 833 | |
0153be05 MK |
834 | /* |
835 | * we do not need to free the memory here, as the | |
836 | * buf is deleted by the caller. | |
837 | */ | |
838 | obj = parse_object_buffer(sha1, type, size, buf, &eaten); | |
839 | if (!obj) | |
c2b97ecf | 840 | die(_("invalid %s"), typename(type)); |
c6807a40 | 841 | if (do_fsck_object && |
22410549 | 842 | fsck_object(obj, buf, size, &fsck_options)) |
c2b97ecf | 843 | die(_("Error in object")); |
22410549 | 844 | if (fsck_walk(obj, NULL, &fsck_options)) |
f2fd0760 | 845 | die(_("Not all child objects of %s are reachable"), oid_to_hex(&obj->oid)); |
0153be05 MK |
846 | |
847 | if (obj->type == OBJ_TREE) { | |
848 | struct tree *item = (struct tree *) obj; | |
849 | item->buffer = NULL; | |
6e454b9a | 850 | obj->parsed = 0; |
0153be05 MK |
851 | } |
852 | if (obj->type == OBJ_COMMIT) { | |
853 | struct commit *commit = (struct commit *) obj; | |
8597ea3a | 854 | if (detach_commit_buffer(commit, NULL) != data) |
0fb370da | 855 | die("BUG: parse_object_buffer transmogrified our buffer"); |
0153be05 MK |
856 | } |
857 | obj->flags |= FLAG_CHECKED; | |
858 | } | |
b8a2486f | 859 | read_unlock(); |
0153be05 | 860 | } |
9ec2dde9 NTND |
861 | |
862 | free(new_data); | |
9cf6d335 SV |
863 | } |
864 | ||
20e95d0a NTND |
865 | /* |
866 | * This function is part of find_unresolved_deltas(). There are two | |
867 | * walkers going in the opposite ways. | |
868 | * | |
869 | * The first one in find_unresolved_deltas() traverses down from | |
870 | * parent node to children, deflating nodes along the way. However, | |
871 | * memory for deflated nodes is limited by delta_base_cache_limit, so | |
872 | * at some point parent node's deflated content may be freed. | |
873 | * | |
874 | * The second walker is this function, which goes from current node up | |
875 | * to top parent if necessary to deflate the node. In normal | |
876 | * situation, its parent node would be already deflated, so it just | |
877 | * needs to apply delta. | |
878 | * | |
879 | * In the worst case scenario, parent node is no longer deflated because | |
880 | * we're running out of delta_base_cache_limit; we need to re-deflate | |
881 | * parents, possibly up to the top base. | |
882 | * | |
883 | * All deflated objects here are subject to be freed if we exceed | |
884 | * delta_base_cache_limit, just like in find_unresolved_deltas(), we | |
885 | * just need to make sure the last node is not freed. | |
886 | */ | |
92392b4a SP |
887 | static void *get_base_data(struct base_data *c) |
888 | { | |
889 | if (!c->data) { | |
890 | struct object_entry *obj = c->obj; | |
20e95d0a NTND |
891 | struct base_data **delta = NULL; |
892 | int delta_nr = 0, delta_alloc = 0; | |
92392b4a | 893 | |
20e95d0a NTND |
894 | while (is_delta_type(c->obj->type) && !c->data) { |
895 | ALLOC_GROW(delta, delta_nr + 1, delta_alloc); | |
896 | delta[delta_nr++] = c; | |
897 | c = c->base; | |
898 | } | |
899 | if (!delta_nr) { | |
900 | c->data = get_data_from_pack(obj); | |
901 | c->size = obj->size; | |
b8a2486f | 902 | get_thread_data()->base_cache_used += c->size; |
20e95d0a NTND |
903 | prune_base_data(c); |
904 | } | |
905 | for (; delta_nr > 0; delta_nr--) { | |
906 | void *base, *raw; | |
907 | c = delta[delta_nr - 1]; | |
908 | obj = c->obj; | |
909 | base = get_base_data(c->base); | |
910 | raw = get_data_from_pack(obj); | |
92392b4a SP |
911 | c->data = patch_delta( |
912 | base, c->base->size, | |
913 | raw, obj->size, | |
914 | &c->size); | |
915 | free(raw); | |
916 | if (!c->data) | |
c2b97ecf | 917 | bad_object(obj->idx.offset, _("failed to apply delta")); |
b8a2486f | 918 | get_thread_data()->base_cache_used += c->size; |
20e95d0a | 919 | prune_base_data(c); |
9441b61d | 920 | } |
20e95d0a | 921 | free(delta); |
92392b4a SP |
922 | } |
923 | return c->data; | |
924 | } | |
925 | ||
f41aebd4 | 926 | static void resolve_delta(struct object_entry *delta_obj, |
9441b61d | 927 | struct base_data *base, struct base_data *result) |
9cf6d335 | 928 | { |
ce3f6dc6 | 929 | void *base_data, *delta_data; |
9cf6d335 | 930 | |
3aba2fdd | 931 | if (show_stat) { |
41730576 NTND |
932 | int i = delta_obj - objects; |
933 | int j = base->obj - objects; | |
934 | obj_stat[i].delta_depth = obj_stat[j].delta_depth + 1; | |
3aba2fdd | 935 | deepest_delta_lock(); |
41730576 NTND |
936 | if (deepest_delta < obj_stat[i].delta_depth) |
937 | deepest_delta = obj_stat[i].delta_depth; | |
3aba2fdd | 938 | deepest_delta_unlock(); |
41730576 | 939 | obj_stat[i].base_object_no = j; |
3aba2fdd | 940 | } |
636171cb | 941 | delta_data = get_data_from_pack(delta_obj); |
ce3f6dc6 | 942 | base_data = get_base_data(base); |
9441b61d | 943 | result->obj = delta_obj; |
ce3f6dc6 NP |
944 | result->data = patch_delta(base_data, base->size, |
945 | delta_data, delta_obj->size, &result->size); | |
9cf6d335 | 946 | free(delta_data); |
9441b61d | 947 | if (!result->data) |
c2b97ecf | 948 | bad_object(delta_obj->idx.offset, _("failed to apply delta")); |
681b07de NTND |
949 | hash_sha1_file(result->data, result->size, |
950 | typename(delta_obj->real_type), delta_obj->idx.sha1); | |
9ec2dde9 | 951 | sha1_object(result->data, NULL, result->size, delta_obj->real_type, |
9441b61d | 952 | delta_obj->idx.sha1); |
b8a2486f | 953 | counter_lock(); |
636171cb | 954 | nr_resolved_deltas++; |
b8a2486f | 955 | counter_unlock(); |
9441b61d NP |
956 | } |
957 | ||
ab791dd1 JK |
958 | /* |
959 | * Standard boolean compare-and-swap: atomically check whether "*type" is | |
960 | * "want"; if so, swap in "set" and return true. Otherwise, leave it untouched | |
961 | * and return false. | |
962 | */ | |
41730576 | 963 | static int compare_and_swap_type(signed char *type, |
ab791dd1 JK |
964 | enum object_type want, |
965 | enum object_type set) | |
966 | { | |
967 | enum object_type old; | |
968 | ||
969 | type_cas_lock(); | |
970 | old = *type; | |
971 | if (old == want) | |
972 | *type = set; | |
973 | type_cas_unlock(); | |
974 | ||
975 | return old == want; | |
976 | } | |
977 | ||
2baad220 NTND |
978 | static struct base_data *find_unresolved_deltas_1(struct base_data *base, |
979 | struct base_data *prev_base) | |
9441b61d | 980 | { |
2baad220 | 981 | if (base->ref_last == -1 && base->ofs_last == -1) { |
c6458e60 NTND |
982 | find_ref_delta_children(base->obj->idx.sha1, |
983 | &base->ref_first, &base->ref_last, | |
984 | OBJ_REF_DELTA); | |
9441b61d | 985 | |
c6458e60 NTND |
986 | find_ofs_delta_children(base->obj->idx.offset, |
987 | &base->ofs_first, &base->ofs_last, | |
988 | OBJ_OFS_DELTA); | |
4a438cab | 989 | |
2baad220 NTND |
990 | if (base->ref_last == -1 && base->ofs_last == -1) { |
991 | free(base->data); | |
992 | return NULL; | |
993 | } | |
53dda6ff | 994 | |
2baad220 NTND |
995 | link_base_data(prev_base, base); |
996 | } | |
4a438cab | 997 | |
2baad220 | 998 | if (base->ref_first <= base->ref_last) { |
c6458e60 | 999 | struct object_entry *child = objects + ref_deltas[base->ref_first].obj_no; |
2baad220 | 1000 | struct base_data *result = alloc_base_data(); |
7218a215 | 1001 | |
ab791dd1 JK |
1002 | if (!compare_and_swap_type(&child->real_type, OBJ_REF_DELTA, |
1003 | base->obj->real_type)) | |
1004 | die("BUG: child->real_type != OBJ_REF_DELTA"); | |
1005 | ||
2baad220 NTND |
1006 | resolve_delta(child, base, result); |
1007 | if (base->ref_first == base->ref_last && base->ofs_last == -1) | |
7218a215 | 1008 | free_base_data(base); |
2baad220 NTND |
1009 | |
1010 | base->ref_first++; | |
1011 | return result; | |
53dda6ff NP |
1012 | } |
1013 | ||
2baad220 | 1014 | if (base->ofs_first <= base->ofs_last) { |
c6458e60 | 1015 | struct object_entry *child = objects + ofs_deltas[base->ofs_first].obj_no; |
2baad220 | 1016 | struct base_data *result = alloc_base_data(); |
7218a215 JH |
1017 | |
1018 | assert(child->real_type == OBJ_OFS_DELTA); | |
ab791dd1 | 1019 | child->real_type = base->obj->real_type; |
2baad220 NTND |
1020 | resolve_delta(child, base, result); |
1021 | if (base->ofs_first == base->ofs_last) | |
7218a215 | 1022 | free_base_data(base); |
2baad220 NTND |
1023 | |
1024 | base->ofs_first++; | |
1025 | return result; | |
9cf6d335 | 1026 | } |
53dda6ff | 1027 | |
9441b61d | 1028 | unlink_base_data(base); |
2baad220 NTND |
1029 | return NULL; |
1030 | } | |
1031 | ||
1032 | static void find_unresolved_deltas(struct base_data *base) | |
1033 | { | |
1034 | struct base_data *new_base, *prev_base = NULL; | |
1035 | for (;;) { | |
1036 | new_base = find_unresolved_deltas_1(base, prev_base); | |
1037 | ||
1038 | if (new_base) { | |
1039 | prev_base = base; | |
1040 | base = new_base; | |
1041 | } else { | |
1042 | free(base); | |
1043 | base = prev_base; | |
1044 | if (!base) | |
1045 | return; | |
1046 | prev_base = base->base; | |
1047 | } | |
1048 | } | |
9cf6d335 SV |
1049 | } |
1050 | ||
c6458e60 | 1051 | static int compare_ofs_delta_entry(const void *a, const void *b) |
9cf6d335 | 1052 | { |
c6458e60 NTND |
1053 | const struct ofs_delta_entry *delta_a = a; |
1054 | const struct ofs_delta_entry *delta_b = b; | |
7218a215 | 1055 | |
f0e7f11d JK |
1056 | return delta_a->offset < delta_b->offset ? -1 : |
1057 | delta_a->offset > delta_b->offset ? 1 : | |
1058 | 0; | |
c6458e60 NTND |
1059 | } |
1060 | ||
1061 | static int compare_ref_delta_entry(const void *a, const void *b) | |
9cf6d335 | 1062 | { |
c6458e60 NTND |
1063 | const struct ref_delta_entry *delta_a = a; |
1064 | const struct ref_delta_entry *delta_b = b; | |
7218a215 | 1065 | |
c6458e60 | 1066 | return hashcmp(delta_a->sha1, delta_b->sha1); |
9cf6d335 SV |
1067 | } |
1068 | ||
5272f755 NTND |
1069 | static void resolve_base(struct object_entry *obj) |
1070 | { | |
1071 | struct base_data *base_obj = alloc_base_data(); | |
1072 | base_obj->obj = obj; | |
1073 | base_obj->data = NULL; | |
1074 | find_unresolved_deltas(base_obj); | |
1075 | } | |
1076 | ||
b8a2486f NTND |
1077 | #ifndef NO_PTHREADS |
1078 | static void *threaded_second_pass(void *data) | |
1079 | { | |
1080 | set_thread_data(data); | |
1081 | for (;;) { | |
1082 | int i; | |
8f82aad4 | 1083 | counter_lock(); |
b8a2486f | 1084 | display_progress(progress, nr_resolved_deltas); |
8f82aad4 TR |
1085 | counter_unlock(); |
1086 | work_lock(); | |
b8a2486f NTND |
1087 | while (nr_dispatched < nr_objects && |
1088 | is_delta_type(objects[nr_dispatched].type)) | |
1089 | nr_dispatched++; | |
1090 | if (nr_dispatched >= nr_objects) { | |
1091 | work_unlock(); | |
1092 | break; | |
1093 | } | |
1094 | i = nr_dispatched++; | |
1095 | work_unlock(); | |
1096 | ||
1097 | resolve_base(&objects[i]); | |
1098 | } | |
1099 | return NULL; | |
1100 | } | |
1101 | #endif | |
1102 | ||
5272f755 NTND |
1103 | /* |
1104 | * First pass: | |
1105 | * - find locations of all objects; | |
1106 | * - calculate SHA1 of all non-delta objects; | |
1107 | * - remember base (SHA1 or offset) for all deltas. | |
1108 | */ | |
2d477051 | 1109 | static void parse_pack_objects(unsigned char *sha1) |
9cf6d335 | 1110 | { |
9ec2dde9 | 1111 | int i, nr_delays = 0; |
c6458e60 NTND |
1112 | struct ofs_delta_entry *ofs_delta = ofs_deltas; |
1113 | unsigned char ref_delta_sha1[20]; | |
2d477051 | 1114 | struct stat st; |
9cf6d335 | 1115 | |
13aaf148 | 1116 | if (verbose) |
29e63ed3 | 1117 | progress = start_progress( |
c2b97ecf | 1118 | from_stdin ? _("Receiving objects") : _("Indexing objects"), |
29e63ed3 | 1119 | nr_objects); |
9cf6d335 SV |
1120 | for (i = 0; i < nr_objects; i++) { |
1121 | struct object_entry *obj = &objects[i]; | |
c6458e60 NTND |
1122 | void *data = unpack_raw_entry(obj, &ofs_delta->offset, |
1123 | ref_delta_sha1, obj->idx.sha1); | |
9cf6d335 | 1124 | obj->real_type = obj->type; |
c6458e60 NTND |
1125 | if (obj->type == OBJ_OFS_DELTA) { |
1126 | nr_ofs_deltas++; | |
1127 | ofs_delta->obj_no = i; | |
1128 | ofs_delta++; | |
1129 | } else if (obj->type == OBJ_REF_DELTA) { | |
1130 | ALLOC_GROW(ref_deltas, nr_ref_deltas + 1, ref_deltas_alloc); | |
1131 | hashcpy(ref_deltas[nr_ref_deltas].sha1, ref_delta_sha1); | |
1132 | ref_deltas[nr_ref_deltas].obj_no = i; | |
1133 | nr_ref_deltas++; | |
9ec2dde9 NTND |
1134 | } else if (!data) { |
1135 | /* large blobs, check later */ | |
1136 | obj->real_type = OBJ_BAD; | |
1137 | nr_delays++; | |
9cf6d335 | 1138 | } else |
9ec2dde9 | 1139 | sha1_object(data, NULL, obj->size, obj->type, obj->idx.sha1); |
9cf6d335 | 1140 | free(data); |
4d4fcc54 | 1141 | display_progress(progress, i+1); |
9cf6d335 | 1142 | } |
aa7e44bf | 1143 | objects[i].idx.offset = consumed_bytes; |
4d4fcc54 | 1144 | stop_progress(&progress); |
2d477051 NP |
1145 | |
1146 | /* Check pack integrity */ | |
636171cb | 1147 | flush(); |
9126f009 | 1148 | git_SHA1_Final(sha1, &input_ctx); |
2d477051 | 1149 | if (hashcmp(fill(20), sha1)) |
c2b97ecf | 1150 | die(_("pack is corrupted (SHA1 mismatch)")); |
9bee2478 | 1151 | use(20); |
2d477051 NP |
1152 | |
1153 | /* If input_fd is a file, we should have reached its end now. */ | |
1154 | if (fstat(input_fd, &st)) | |
c2b97ecf | 1155 | die_errno(_("cannot fstat packfile")); |
fa257b05 JS |
1156 | if (S_ISREG(st.st_mode) && |
1157 | lseek(input_fd, 0, SEEK_CUR) - input_len != st.st_size) | |
c2b97ecf | 1158 | die(_("pack has junk at the end")); |
9ec2dde9 NTND |
1159 | |
1160 | for (i = 0; i < nr_objects; i++) { | |
1161 | struct object_entry *obj = &objects[i]; | |
1162 | if (obj->real_type != OBJ_BAD) | |
1163 | continue; | |
1164 | obj->real_type = obj->type; | |
1165 | sha1_object(NULL, obj, obj->size, obj->type, obj->idx.sha1); | |
1166 | nr_delays--; | |
1167 | } | |
1168 | if (nr_delays) | |
1169 | die(_("confusion beyond insanity in parse_pack_objects()")); | |
5272f755 NTND |
1170 | } |
1171 | ||
1172 | /* | |
1173 | * Second pass: | |
1174 | * - for all non-delta objects, look if it is used as a base for | |
1175 | * deltas; | |
1176 | * - if used as a base, uncompress the object and apply all deltas, | |
1177 | * recursively checking if the resulting object is used as a base | |
1178 | * for some more deltas. | |
1179 | */ | |
1180 | static void resolve_deltas(void) | |
1181 | { | |
1182 | int i; | |
9cf6d335 | 1183 | |
c6458e60 | 1184 | if (!nr_ofs_deltas && !nr_ref_deltas) |
3c9af366 NP |
1185 | return; |
1186 | ||
53dda6ff | 1187 | /* Sort deltas by base SHA1/offset for fast searching */ |
c6458e60 NTND |
1188 | qsort(ofs_deltas, nr_ofs_deltas, sizeof(struct ofs_delta_entry), |
1189 | compare_ofs_delta_entry); | |
1190 | qsort(ref_deltas, nr_ref_deltas, sizeof(struct ref_delta_entry), | |
1191 | compare_ref_delta_entry); | |
9cf6d335 | 1192 | |
13aaf148 | 1193 | if (verbose) |
c6458e60 NTND |
1194 | progress = start_progress(_("Resolving deltas"), |
1195 | nr_ref_deltas + nr_ofs_deltas); | |
b8a2486f NTND |
1196 | |
1197 | #ifndef NO_PTHREADS | |
1198 | nr_dispatched = 0; | |
1199 | if (nr_threads > 1 || getenv("GIT_FORCE_THREADS")) { | |
1200 | init_thread(); | |
1201 | for (i = 0; i < nr_threads; i++) { | |
1202 | int ret = pthread_create(&thread_data[i].thread, NULL, | |
1203 | threaded_second_pass, thread_data + i); | |
1204 | if (ret) | |
f350df42 NTND |
1205 | die(_("unable to create thread: %s"), |
1206 | strerror(ret)); | |
b8a2486f NTND |
1207 | } |
1208 | for (i = 0; i < nr_threads; i++) | |
1209 | pthread_join(thread_data[i].thread, NULL); | |
1210 | cleanup_thread(); | |
1211 | return; | |
1212 | } | |
1213 | #endif | |
1214 | ||
9cf6d335 SV |
1215 | for (i = 0; i < nr_objects; i++) { |
1216 | struct object_entry *obj = &objects[i]; | |
9cf6d335 | 1217 | |
4f8ec74e | 1218 | if (is_delta_type(obj->type)) |
9cf6d335 | 1219 | continue; |
5272f755 | 1220 | resolve_base(obj); |
4d4fcc54 | 1221 | display_progress(progress, nr_resolved_deltas); |
9cf6d335 | 1222 | } |
636171cb NP |
1223 | } |
1224 | ||
5272f755 NTND |
1225 | /* |
1226 | * Third pass: | |
1227 | * - append objects to convert thin pack to full pack if required | |
1228 | * - write the final 20-byte SHA-1 | |
1229 | */ | |
781d9306 | 1230 | static void fix_unresolved_deltas(struct sha1file *f); |
5272f755 NTND |
1231 | static void conclude_pack(int fix_thin_pack, const char *curr_pack, unsigned char *pack_sha1) |
1232 | { | |
c6458e60 | 1233 | if (nr_ref_deltas + nr_ofs_deltas == nr_resolved_deltas) { |
5272f755 NTND |
1234 | stop_progress(&progress); |
1235 | /* Flush remaining pack final 20-byte SHA1. */ | |
1236 | flush(); | |
1237 | return; | |
1238 | } | |
1239 | ||
1240 | if (fix_thin_pack) { | |
1241 | struct sha1file *f; | |
1242 | unsigned char read_sha1[20], tail_sha1[20]; | |
5c3459fc | 1243 | struct strbuf msg = STRBUF_INIT; |
c6458e60 | 1244 | int nr_unresolved = nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas; |
5272f755 NTND |
1245 | int nr_objects_initial = nr_objects; |
1246 | if (nr_unresolved <= 0) | |
cc13431a | 1247 | die(_("confusion beyond insanity")); |
2756ca43 | 1248 | REALLOC_ARRAY(objects, nr_objects + nr_unresolved + 1); |
57165db0 JK |
1249 | memset(objects + nr_objects + 1, 0, |
1250 | nr_unresolved * sizeof(*objects)); | |
5272f755 | 1251 | f = sha1fd(output_fd, curr_pack); |
781d9306 | 1252 | fix_unresolved_deltas(f); |
5c3459fc NTND |
1253 | strbuf_addf(&msg, _("completed with %d local objects"), |
1254 | nr_objects - nr_objects_initial); | |
1255 | stop_progress_msg(&progress, msg.buf); | |
1256 | strbuf_release(&msg); | |
5272f755 NTND |
1257 | sha1close(f, tail_sha1, 0); |
1258 | hashcpy(read_sha1, pack_sha1); | |
1259 | fixup_pack_header_footer(output_fd, pack_sha1, | |
1260 | curr_pack, nr_objects, | |
1261 | read_sha1, consumed_bytes-20); | |
1262 | if (hashcmp(read_sha1, tail_sha1) != 0) | |
f350df42 NTND |
1263 | die(_("Unexpected tail checksum for %s " |
1264 | "(disk corruption?)"), curr_pack); | |
5272f755 | 1265 | } |
c6458e60 | 1266 | if (nr_ofs_deltas + nr_ref_deltas != nr_resolved_deltas) |
cc13431a JH |
1267 | die(Q_("pack has %d unresolved delta", |
1268 | "pack has %d unresolved deltas", | |
c6458e60 NTND |
1269 | nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas), |
1270 | nr_ofs_deltas + nr_ref_deltas - nr_resolved_deltas); | |
5272f755 NTND |
1271 | } |
1272 | ||
8522148f | 1273 | static int write_compressed(struct sha1file *f, void *in, unsigned int size) |
636171cb | 1274 | { |
ef49a7a0 | 1275 | git_zstream stream; |
7734d7f2 NP |
1276 | int status; |
1277 | unsigned char outbuf[4096]; | |
636171cb | 1278 | |
55bb5c91 | 1279 | git_deflate_init(&stream, zlib_compression_level); |
636171cb NP |
1280 | stream.next_in = in; |
1281 | stream.avail_in = size; | |
636171cb | 1282 | |
7734d7f2 NP |
1283 | do { |
1284 | stream.next_out = outbuf; | |
1285 | stream.avail_out = sizeof(outbuf); | |
55bb5c91 | 1286 | status = git_deflate(&stream, Z_FINISH); |
7734d7f2 NP |
1287 | sha1write(f, outbuf, sizeof(outbuf) - stream.avail_out); |
1288 | } while (status == Z_OK); | |
1289 | ||
1290 | if (status != Z_STREAM_END) | |
c2b97ecf | 1291 | die(_("unable to deflate appended object (%d)"), status); |
636171cb | 1292 | size = stream.total_out; |
55bb5c91 | 1293 | git_deflate_end(&stream); |
636171cb NP |
1294 | return size; |
1295 | } | |
1296 | ||
8522148f | 1297 | static struct object_entry *append_obj_to_pack(struct sha1file *f, |
03993e13 | 1298 | const unsigned char *sha1, void *buf, |
636171cb NP |
1299 | unsigned long size, enum object_type type) |
1300 | { | |
1301 | struct object_entry *obj = &objects[nr_objects++]; | |
1302 | unsigned char header[10]; | |
1303 | unsigned long s = size; | |
1304 | int n = 0; | |
1305 | unsigned char c = (type << 4) | (s & 15); | |
1306 | s >>= 4; | |
1307 | while (s) { | |
1308 | header[n++] = c | 0x80; | |
1309 | c = s & 0x7f; | |
1310 | s >>= 7; | |
1311 | } | |
1312 | header[n++] = c; | |
8522148f NP |
1313 | crc32_begin(f); |
1314 | sha1write(f, header, n); | |
72de2883 BS |
1315 | obj[0].size = size; |
1316 | obj[0].hdr_size = n; | |
1317 | obj[0].type = type; | |
1318 | obj[0].real_type = type; | |
aa7e44bf | 1319 | obj[1].idx.offset = obj[0].idx.offset + n; |
8522148f NP |
1320 | obj[1].idx.offset += write_compressed(f, buf, size); |
1321 | obj[0].idx.crc32 = crc32_end(f); | |
838cd346 | 1322 | sha1flush(f); |
aa7e44bf | 1323 | hashcpy(obj->idx.sha1, sha1); |
03993e13 | 1324 | return obj; |
636171cb NP |
1325 | } |
1326 | ||
1327 | static int delta_pos_compare(const void *_a, const void *_b) | |
1328 | { | |
c6458e60 NTND |
1329 | struct ref_delta_entry *a = *(struct ref_delta_entry **)_a; |
1330 | struct ref_delta_entry *b = *(struct ref_delta_entry **)_b; | |
636171cb NP |
1331 | return a->obj_no - b->obj_no; |
1332 | } | |
9cf6d335 | 1333 | |
781d9306 | 1334 | static void fix_unresolved_deltas(struct sha1file *f) |
636171cb | 1335 | { |
c6458e60 | 1336 | struct ref_delta_entry **sorted_by_pos; |
781d9306 | 1337 | int i; |
636171cb NP |
1338 | |
1339 | /* | |
1340 | * Since many unresolved deltas may well be themselves base objects | |
1341 | * for more unresolved deltas, we really want to include the | |
1342 | * smallest number of base objects that would cover as much delta | |
1343 | * as possible by picking the | |
1344 | * trunc deltas first, allowing for other deltas to resolve without | |
1345 | * additional base objects. Since most base objects are to be found | |
1346 | * before deltas depending on them, a good heuristic is to start | |
1347 | * resolving deltas in the same order as their position in the pack. | |
1348 | */ | |
781d9306 | 1349 | sorted_by_pos = xmalloc(nr_ref_deltas * sizeof(*sorted_by_pos)); |
c6458e60 | 1350 | for (i = 0; i < nr_ref_deltas; i++) |
781d9306 JH |
1351 | sorted_by_pos[i] = &ref_deltas[i]; |
1352 | qsort(sorted_by_pos, nr_ref_deltas, sizeof(*sorted_by_pos), delta_pos_compare); | |
636171cb | 1353 | |
781d9306 | 1354 | for (i = 0; i < nr_ref_deltas; i++) { |
c6458e60 | 1355 | struct ref_delta_entry *d = sorted_by_pos[i]; |
21666f1a | 1356 | enum object_type type; |
2baad220 | 1357 | struct base_data *base_obj = alloc_base_data(); |
636171cb NP |
1358 | |
1359 | if (objects[d->obj_no].real_type != OBJ_REF_DELTA) | |
1360 | continue; | |
c6458e60 | 1361 | base_obj->data = read_sha1_file(d->sha1, &type, &base_obj->size); |
2baad220 | 1362 | if (!base_obj->data) |
636171cb | 1363 | continue; |
636171cb | 1364 | |
c6458e60 | 1365 | if (check_sha1_signature(d->sha1, base_obj->data, |
2baad220 | 1366 | base_obj->size, typename(type))) |
c6458e60 NTND |
1367 | die(_("local object %s is corrupt"), sha1_to_hex(d->sha1)); |
1368 | base_obj->obj = append_obj_to_pack(f, d->sha1, | |
2baad220 NTND |
1369 | base_obj->data, base_obj->size, type); |
1370 | find_unresolved_deltas(base_obj); | |
4d4fcc54 | 1371 | display_progress(progress, nr_resolved_deltas); |
636171cb NP |
1372 | } |
1373 | free(sorted_by_pos); | |
1374 | } | |
1375 | ||
e42797f5 NP |
1376 | static void final(const char *final_pack_name, const char *curr_pack_name, |
1377 | const char *final_index_name, const char *curr_index_name, | |
b8077709 | 1378 | const char *keep_name, const char *keep_msg, |
e42797f5 NP |
1379 | unsigned char *sha1) |
1380 | { | |
3a55602e | 1381 | const char *report = "pack"; |
e42797f5 NP |
1382 | char name[PATH_MAX]; |
1383 | int err; | |
1384 | ||
1385 | if (!from_stdin) { | |
1386 | close(input_fd); | |
1387 | } else { | |
4c81b03e | 1388 | fsync_or_die(output_fd, curr_pack_name); |
e42797f5 NP |
1389 | err = close(output_fd); |
1390 | if (err) | |
c2b97ecf | 1391 | die_errno(_("error while closing pack file")); |
e42797f5 NP |
1392 | } |
1393 | ||
b8077709 SP |
1394 | if (keep_msg) { |
1395 | int keep_fd, keep_msg_len = strlen(keep_msg); | |
6e180cdc JH |
1396 | |
1397 | if (!keep_name) | |
1398 | keep_fd = odb_pack_keep(name, sizeof(name), sha1); | |
1399 | else | |
1400 | keep_fd = open(keep_name, O_RDWR|O_CREAT|O_EXCL, 0600); | |
1401 | ||
9ca4a201 NP |
1402 | if (keep_fd < 0) { |
1403 | if (errno != EEXIST) | |
c2b97ecf | 1404 | die_errno(_("cannot write keep file '%s'"), |
de983a0a | 1405 | keep_name ? keep_name : name); |
9ca4a201 NP |
1406 | } else { |
1407 | if (keep_msg_len > 0) { | |
1408 | write_or_die(keep_fd, keep_msg, keep_msg_len); | |
1409 | write_or_die(keep_fd, "\n", 1); | |
1410 | } | |
91c8d590 | 1411 | if (close(keep_fd) != 0) |
c2b97ecf | 1412 | die_errno(_("cannot close written keep file '%s'"), |
de983a0a | 1413 | keep_name ? keep_name : name); |
576162a4 | 1414 | report = "keep"; |
b8077709 | 1415 | } |
b8077709 SP |
1416 | } |
1417 | ||
e42797f5 NP |
1418 | if (final_pack_name != curr_pack_name) { |
1419 | if (!final_pack_name) { | |
1420 | snprintf(name, sizeof(name), "%s/pack/pack-%s.pack", | |
1421 | get_object_directory(), sha1_to_hex(sha1)); | |
1422 | final_pack_name = name; | |
1423 | } | |
cb5add58 | 1424 | if (finalize_object_file(curr_pack_name, final_pack_name)) |
c2b97ecf | 1425 | die(_("cannot store pack file")); |
fb8b1936 | 1426 | } else if (from_stdin) |
33b65030 | 1427 | chmod(final_pack_name, 0444); |
e42797f5 | 1428 | |
e42797f5 NP |
1429 | if (final_index_name != curr_index_name) { |
1430 | if (!final_index_name) { | |
1431 | snprintf(name, sizeof(name), "%s/pack/pack-%s.idx", | |
1432 | get_object_directory(), sha1_to_hex(sha1)); | |
1433 | final_index_name = name; | |
1434 | } | |
cb5add58 | 1435 | if (finalize_object_file(curr_index_name, final_index_name)) |
c2b97ecf | 1436 | die(_("cannot store index file")); |
fb8b1936 JH |
1437 | } else |
1438 | chmod(final_index_name, 0444); | |
576162a4 NP |
1439 | |
1440 | if (!from_stdin) { | |
1441 | printf("%s\n", sha1_to_hex(sha1)); | |
1442 | } else { | |
1443 | char buf[48]; | |
1444 | int len = snprintf(buf, sizeof(buf), "%s\t%s\n", | |
1445 | report, sha1_to_hex(sha1)); | |
d1b2ddc8 | 1446 | write_or_die(1, buf, len); |
576162a4 NP |
1447 | |
1448 | /* | |
1449 | * Let's just mimic git-unpack-objects here and write | |
1450 | * the last part of the input buffer to stdout. | |
1451 | */ | |
1452 | while (input_len) { | |
1453 | err = xwrite(1, input_buffer + input_offset, input_len); | |
1454 | if (err <= 0) | |
1455 | break; | |
1456 | input_len -= err; | |
1457 | input_offset += err; | |
1458 | } | |
1459 | } | |
9cf6d335 SV |
1460 | } |
1461 | ||
ef90d6d4 | 1462 | static int git_index_pack_config(const char *k, const char *v, void *cb) |
4d00bda2 | 1463 | { |
ebcfb379 JH |
1464 | struct pack_idx_option *opts = cb; |
1465 | ||
4d00bda2 | 1466 | if (!strcmp(k, "pack.indexversion")) { |
ebcfb379 JH |
1467 | opts->version = git_config_int(k, v); |
1468 | if (opts->version > 2) | |
f350df42 | 1469 | die(_("bad pack.indexversion=%"PRIu32), opts->version); |
4d00bda2 NP |
1470 | return 0; |
1471 | } | |
b8a2486f NTND |
1472 | if (!strcmp(k, "pack.threads")) { |
1473 | nr_threads = git_config_int(k, v); | |
1474 | if (nr_threads < 0) | |
f350df42 | 1475 | die(_("invalid number of threads specified (%d)"), |
b8a2486f NTND |
1476 | nr_threads); |
1477 | #ifdef NO_PTHREADS | |
1478 | if (nr_threads != 1) | |
f350df42 | 1479 | warning(_("no threads support, ignoring %s"), k); |
b8a2486f NTND |
1480 | nr_threads = 1; |
1481 | #endif | |
1482 | return 0; | |
1483 | } | |
ef90d6d4 | 1484 | return git_default_config(k, v, cb); |
4d00bda2 NP |
1485 | } |
1486 | ||
3c9fc074 JH |
1487 | static int cmp_uint32(const void *a_, const void *b_) |
1488 | { | |
1489 | uint32_t a = *((uint32_t *)a_); | |
1490 | uint32_t b = *((uint32_t *)b_); | |
1491 | ||
1492 | return (a < b) ? -1 : (a != b); | |
1493 | } | |
1494 | ||
1495 | static void read_v2_anomalous_offsets(struct packed_git *p, | |
1496 | struct pack_idx_option *opts) | |
1497 | { | |
1498 | const uint32_t *idx1, *idx2; | |
1499 | uint32_t i; | |
1500 | ||
1501 | /* The address of the 4-byte offset table */ | |
1502 | idx1 = (((const uint32_t *)p->index_data) | |
1503 | + 2 /* 8-byte header */ | |
1504 | + 256 /* fan out */ | |
1505 | + 5 * p->num_objects /* 20-byte SHA-1 table */ | |
1506 | + p->num_objects /* CRC32 table */ | |
1507 | ); | |
1508 | ||
1509 | /* The address of the 8-byte offset table */ | |
1510 | idx2 = idx1 + p->num_objects; | |
1511 | ||
1512 | for (i = 0; i < p->num_objects; i++) { | |
1513 | uint32_t off = ntohl(idx1[i]); | |
1514 | if (!(off & 0x80000000)) | |
1515 | continue; | |
1516 | off = off & 0x7fffffff; | |
1517 | if (idx2[off * 2]) | |
1518 | continue; | |
1519 | /* | |
1520 | * The real offset is ntohl(idx2[off * 2]) in high 4 | |
1521 | * octets, and ntohl(idx2[off * 2 + 1]) in low 4 | |
1522 | * octets. But idx2[off * 2] is Zero!!! | |
1523 | */ | |
1524 | ALLOC_GROW(opts->anomaly, opts->anomaly_nr + 1, opts->anomaly_alloc); | |
1525 | opts->anomaly[opts->anomaly_nr++] = ntohl(idx2[off * 2 + 1]); | |
1526 | } | |
1527 | ||
1528 | if (1 < opts->anomaly_nr) | |
1529 | qsort(opts->anomaly, opts->anomaly_nr, sizeof(uint32_t), cmp_uint32); | |
1530 | } | |
1531 | ||
e337a04d JH |
1532 | static void read_idx_option(struct pack_idx_option *opts, const char *pack_name) |
1533 | { | |
1534 | struct packed_git *p = add_packed_git(pack_name, strlen(pack_name), 1); | |
1535 | ||
1536 | if (!p) | |
c2b97ecf | 1537 | die(_("Cannot open existing pack file '%s'"), pack_name); |
e337a04d | 1538 | if (open_pack_index(p)) |
c2b97ecf | 1539 | die(_("Cannot open existing pack idx file for '%s'"), pack_name); |
e337a04d JH |
1540 | |
1541 | /* Read the attributes from the existing idx file */ | |
1542 | opts->version = p->index_version; | |
1543 | ||
3c9fc074 JH |
1544 | if (opts->version == 2) |
1545 | read_v2_anomalous_offsets(p, opts); | |
1546 | ||
e337a04d JH |
1547 | /* |
1548 | * Get rid of the idx file as we do not need it anymore. | |
1549 | * NEEDSWORK: extract this bit from free_pack_by_name() in | |
1550 | * sha1_file.c, perhaps? It shouldn't matter very much as we | |
1551 | * know we haven't installed this pack (hence we never have | |
1552 | * read anything from it). | |
1553 | */ | |
1554 | close_pack_index(p); | |
1555 | free(p); | |
1556 | } | |
1557 | ||
38a45561 JH |
1558 | static void show_pack_info(int stat_only) |
1559 | { | |
c6458e60 | 1560 | int i, baseobjects = nr_objects - nr_ref_deltas - nr_ofs_deltas; |
d1a0ed18 JH |
1561 | unsigned long *chain_histogram = NULL; |
1562 | ||
1563 | if (deepest_delta) | |
1564 | chain_histogram = xcalloc(deepest_delta, sizeof(unsigned long)); | |
1565 | ||
38a45561 JH |
1566 | for (i = 0; i < nr_objects; i++) { |
1567 | struct object_entry *obj = &objects[i]; | |
1568 | ||
d1a0ed18 | 1569 | if (is_delta_type(obj->type)) |
41730576 | 1570 | chain_histogram[obj_stat[i].delta_depth - 1]++; |
38a45561 JH |
1571 | if (stat_only) |
1572 | continue; | |
1573 | printf("%s %-6s %lu %lu %"PRIuMAX, | |
1574 | sha1_to_hex(obj->idx.sha1), | |
1575 | typename(obj->real_type), obj->size, | |
1576 | (unsigned long)(obj[1].idx.offset - obj->idx.offset), | |
1577 | (uintmax_t)obj->idx.offset); | |
1578 | if (is_delta_type(obj->type)) { | |
41730576 NTND |
1579 | struct object_entry *bobj = &objects[obj_stat[i].base_object_no]; |
1580 | printf(" %u %s", obj_stat[i].delta_depth, sha1_to_hex(bobj->idx.sha1)); | |
38a45561 JH |
1581 | } |
1582 | putchar('\n'); | |
1583 | } | |
d1a0ed18 JH |
1584 | |
1585 | if (baseobjects) | |
c2b97ecf NTND |
1586 | printf_ln(Q_("non delta: %d object", |
1587 | "non delta: %d objects", | |
1588 | baseobjects), | |
1589 | baseobjects); | |
d1a0ed18 JH |
1590 | for (i = 0; i < deepest_delta; i++) { |
1591 | if (!chain_histogram[i]) | |
1592 | continue; | |
c2b97ecf NTND |
1593 | printf_ln(Q_("chain length = %d: %lu object", |
1594 | "chain length = %d: %lu objects", | |
1595 | chain_histogram[i]), | |
1596 | i + 1, | |
1597 | chain_histogram[i]); | |
d1a0ed18 | 1598 | } |
38a45561 JH |
1599 | } |
1600 | ||
3bb72562 | 1601 | int cmd_index_pack(int argc, const char **argv, const char *prefix) |
9cf6d335 | 1602 | { |
3aba2fdd | 1603 | int i, fix_thin_pack = 0, verify = 0, stat_only = 0; |
39539495 | 1604 | const char *curr_index; |
3bb72562 | 1605 | const char *index_name = NULL, *pack_name = NULL; |
b8077709 | 1606 | const char *keep_name = NULL, *keep_msg = NULL; |
592ce208 JK |
1607 | struct strbuf index_name_buf = STRBUF_INIT, |
1608 | keep_name_buf = STRBUF_INIT; | |
aa7e44bf | 1609 | struct pack_idx_entry **idx_objects; |
ebcfb379 | 1610 | struct pack_idx_option opts; |
8522148f | 1611 | unsigned char pack_sha1[20]; |
c6807a40 | 1612 | unsigned foreign_nr = 1; /* zero is a "good" value, assume bad */ |
9cf6d335 | 1613 | |
99caeed0 JN |
1614 | if (argc == 2 && !strcmp(argv[1], "-h")) |
1615 | usage(index_pack_usage); | |
1616 | ||
afc711b8 | 1617 | check_replace_refs = 0; |
22410549 | 1618 | fsck_options.walk = mark_link; |
6e2a09d2 | 1619 | |
ebcfb379 JH |
1620 | reset_pack_idx_option(&opts); |
1621 | git_config(git_index_pack_config, &opts); | |
3f8099fc | 1622 | if (prefix && chdir(prefix)) |
c2b97ecf | 1623 | die(_("Cannot come back to cwd")); |
4d00bda2 | 1624 | |
9cf6d335 | 1625 | for (i = 1; i < argc; i++) { |
3bb72562 | 1626 | const char *arg = argv[i]; |
9cf6d335 SV |
1627 | |
1628 | if (*arg == '-') { | |
e42797f5 NP |
1629 | if (!strcmp(arg, "--stdin")) { |
1630 | from_stdin = 1; | |
636171cb NP |
1631 | } else if (!strcmp(arg, "--fix-thin")) { |
1632 | fix_thin_pack = 1; | |
0153be05 MK |
1633 | } else if (!strcmp(arg, "--strict")) { |
1634 | strict = 1; | |
c6807a40 | 1635 | do_fsck_object = 1; |
5d477a33 JS |
1636 | } else if (skip_prefix(arg, "--strict=", &arg)) { |
1637 | strict = 1; | |
1638 | do_fsck_object = 1; | |
1639 | fsck_set_msg_types(&fsck_options, arg); | |
c6807a40 NTND |
1640 | } else if (!strcmp(arg, "--check-self-contained-and-connected")) { |
1641 | strict = 1; | |
1642 | check_self_contained_and_connected = 1; | |
e337a04d JH |
1643 | } else if (!strcmp(arg, "--verify")) { |
1644 | verify = 1; | |
38a45561 JH |
1645 | } else if (!strcmp(arg, "--verify-stat")) { |
1646 | verify = 1; | |
3aba2fdd | 1647 | show_stat = 1; |
38a45561 JH |
1648 | } else if (!strcmp(arg, "--verify-stat-only")) { |
1649 | verify = 1; | |
3aba2fdd | 1650 | show_stat = 1; |
38a45561 | 1651 | stat_only = 1; |
b8077709 SP |
1652 | } else if (!strcmp(arg, "--keep")) { |
1653 | keep_msg = ""; | |
59556548 | 1654 | } else if (starts_with(arg, "--keep=")) { |
b8077709 | 1655 | keep_msg = arg + 7; |
59556548 | 1656 | } else if (starts_with(arg, "--threads=")) { |
b8a2486f NTND |
1657 | char *end; |
1658 | nr_threads = strtoul(arg+10, &end, 0); | |
1659 | if (!arg[10] || *end || nr_threads < 0) | |
1660 | usage(index_pack_usage); | |
1661 | #ifdef NO_PTHREADS | |
1662 | if (nr_threads != 1) | |
f350df42 NTND |
1663 | warning(_("no threads support, " |
1664 | "ignoring %s"), arg); | |
b8a2486f NTND |
1665 | nr_threads = 1; |
1666 | #endif | |
59556548 | 1667 | } else if (starts_with(arg, "--pack_header=")) { |
bed006fb NP |
1668 | struct pack_header *hdr; |
1669 | char *c; | |
1670 | ||
1671 | hdr = (struct pack_header *)input_buffer; | |
1672 | hdr->hdr_signature = htonl(PACK_SIGNATURE); | |
1673 | hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10)); | |
1674 | if (*c != ',') | |
c2b97ecf | 1675 | die(_("bad %s"), arg); |
bed006fb NP |
1676 | hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10)); |
1677 | if (*c) | |
c2b97ecf | 1678 | die(_("bad %s"), arg); |
bed006fb | 1679 | input_len = sizeof(*hdr); |
3c9af366 NP |
1680 | } else if (!strcmp(arg, "-v")) { |
1681 | verbose = 1; | |
e42797f5 | 1682 | } else if (!strcmp(arg, "-o")) { |
9cf6d335 SV |
1683 | if (index_name || (i+1) >= argc) |
1684 | usage(index_pack_usage); | |
1685 | index_name = argv[++i]; | |
59556548 | 1686 | } else if (starts_with(arg, "--index-version=")) { |
4ba7d711 | 1687 | char *c; |
ebcfb379 JH |
1688 | opts.version = strtoul(arg + 16, &c, 10); |
1689 | if (opts.version > 2) | |
c2b97ecf | 1690 | die(_("bad %s"), arg); |
4ba7d711 | 1691 | if (*c == ',') |
ebcfb379 JH |
1692 | opts.off32_limit = strtoul(c+1, &c, 0); |
1693 | if (*c || opts.off32_limit & 0x80000000) | |
c2b97ecf | 1694 | die(_("bad %s"), arg); |
9cf6d335 SV |
1695 | } else |
1696 | usage(index_pack_usage); | |
1697 | continue; | |
1698 | } | |
1699 | ||
1700 | if (pack_name) | |
1701 | usage(index_pack_usage); | |
1702 | pack_name = arg; | |
1703 | } | |
1704 | ||
e42797f5 | 1705 | if (!pack_name && !from_stdin) |
9cf6d335 | 1706 | usage(index_pack_usage); |
636171cb | 1707 | if (fix_thin_pack && !from_stdin) |
c2b97ecf | 1708 | die(_("--fix-thin cannot be used without --stdin")); |
e42797f5 | 1709 | if (!index_name && pack_name) { |
592ce208 JK |
1710 | size_t len; |
1711 | if (!strip_suffix(pack_name, ".pack", &len)) | |
c2b97ecf | 1712 | die(_("packfile name '%s' does not end with '.pack'"), |
9cf6d335 | 1713 | pack_name); |
592ce208 JK |
1714 | strbuf_add(&index_name_buf, pack_name, len); |
1715 | strbuf_addstr(&index_name_buf, ".idx"); | |
1716 | index_name = index_name_buf.buf; | |
9cf6d335 | 1717 | } |
b8077709 | 1718 | if (keep_msg && !keep_name && pack_name) { |
592ce208 JK |
1719 | size_t len; |
1720 | if (!strip_suffix(pack_name, ".pack", &len)) | |
c2b97ecf | 1721 | die(_("packfile name '%s' does not end with '.pack'"), |
b8077709 | 1722 | pack_name); |
592ce208 JK |
1723 | strbuf_add(&keep_name_buf, pack_name, len); |
1724 | strbuf_addstr(&keep_name_buf, ".idx"); | |
1725 | keep_name = keep_name_buf.buf; | |
b8077709 | 1726 | } |
e337a04d JH |
1727 | if (verify) { |
1728 | if (!index_name) | |
c2b97ecf | 1729 | die(_("--verify with no packfile name given")); |
e337a04d | 1730 | read_idx_option(&opts, index_name); |
68be2fea | 1731 | opts.flags |= WRITE_IDX_VERIFY | WRITE_IDX_STRICT; |
e337a04d | 1732 | } |
68be2fea JH |
1733 | if (strict) |
1734 | opts.flags |= WRITE_IDX_STRICT; | |
9cf6d335 | 1735 | |
b8a2486f NTND |
1736 | #ifndef NO_PTHREADS |
1737 | if (!nr_threads) { | |
1738 | nr_threads = online_cpus(); | |
1739 | /* An experiment showed that more threads does not mean faster */ | |
1740 | if (nr_threads > 3) | |
1741 | nr_threads = 3; | |
1742 | } | |
1743 | #endif | |
1744 | ||
e42797f5 | 1745 | curr_pack = open_pack_file(pack_name); |
9cf6d335 | 1746 | parse_pack_header(); |
38a45561 | 1747 | objects = xcalloc(nr_objects + 1, sizeof(struct object_entry)); |
41730576 NTND |
1748 | if (show_stat) |
1749 | obj_stat = xcalloc(nr_objects + 1, sizeof(struct object_stat)); | |
c6458e60 | 1750 | ofs_deltas = xcalloc(nr_objects, sizeof(struct ofs_delta_entry)); |
8522148f | 1751 | parse_pack_objects(pack_sha1); |
5272f755 NTND |
1752 | resolve_deltas(); |
1753 | conclude_pack(fix_thin_pack, curr_pack, pack_sha1); | |
c6458e60 NTND |
1754 | free(ofs_deltas); |
1755 | free(ref_deltas); | |
0153be05 | 1756 | if (strict) |
c6807a40 | 1757 | foreign_nr = check_objects(); |
aa7e44bf | 1758 | |
3aba2fdd | 1759 | if (show_stat) |
38a45561 JH |
1760 | show_pack_info(stat_only); |
1761 | ||
aa7e44bf GB |
1762 | idx_objects = xmalloc((nr_objects) * sizeof(struct pack_idx_entry *)); |
1763 | for (i = 0; i < nr_objects; i++) | |
1764 | idx_objects[i] = &objects[i].idx; | |
ebcfb379 | 1765 | curr_index = write_idx_file(index_name, idx_objects, nr_objects, &opts, pack_sha1); |
aa7e44bf GB |
1766 | free(idx_objects); |
1767 | ||
e337a04d JH |
1768 | if (!verify) |
1769 | final(pack_name, curr_pack, | |
1770 | index_name, curr_index, | |
1771 | keep_name, keep_msg, | |
1772 | pack_sha1); | |
1773 | else | |
1774 | close(input_fd); | |
9cf6d335 | 1775 | free(objects); |
592ce208 JK |
1776 | strbuf_release(&index_name_buf); |
1777 | strbuf_release(&keep_name_buf); | |
c85228ed | 1778 | if (pack_name == NULL) |
3bb72562 | 1779 | free((void *) curr_pack); |
c85228ed | 1780 | if (index_name == NULL) |
3bb72562 | 1781 | free((void *) curr_index); |
9cf6d335 | 1782 | |
c6807a40 NTND |
1783 | /* |
1784 | * Let the caller know this pack is not self contained | |
1785 | */ | |
1786 | if (check_self_contained_and_connected && foreign_nr) | |
1787 | return 1; | |
1788 | ||
9cf6d335 SV |
1789 | return 0; |
1790 | } |