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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" |
b8a2486f | 12 | #include "thread-utils.h" |
9cf6d335 SV |
13 | |
14 | static const char index_pack_usage[] = | |
e337a04d | 15 | "git index-pack [-v] [-o <index-file>] [--keep | --keep=<msg>] [--verify] [--strict] (<pack-file> | --stdin [--fix-thin] [<pack-file>])"; |
9cf6d335 | 16 | |
9cba13ca | 17 | struct object_entry { |
aa7e44bf | 18 | struct pack_idx_entry idx; |
2d477051 NP |
19 | unsigned long size; |
20 | unsigned int hdr_size; | |
9cf6d335 SV |
21 | enum object_type type; |
22 | enum object_type real_type; | |
38a45561 JH |
23 | unsigned delta_depth; |
24 | int base_object_no; | |
9cf6d335 SV |
25 | }; |
26 | ||
53dda6ff NP |
27 | union delta_base { |
28 | unsigned char sha1[20]; | |
d7dd0223 | 29 | off_t offset; |
53dda6ff NP |
30 | }; |
31 | ||
f41aebd4 | 32 | struct base_data { |
4a438cab SP |
33 | struct base_data *base; |
34 | struct base_data *child; | |
03993e13 | 35 | struct object_entry *obj; |
f41aebd4 SP |
36 | void *data; |
37 | unsigned long size; | |
2baad220 NTND |
38 | int ref_first, ref_last; |
39 | int ofs_first, ofs_last; | |
f41aebd4 SP |
40 | }; |
41 | ||
b038a610 NTND |
42 | #if !defined(NO_PTHREADS) && defined(NO_PREAD) |
43 | /* NO_PREAD uses compat/pread.c, which is not thread-safe. Disable threading. */ | |
44 | #define NO_PTHREADS | |
45 | #endif | |
46 | ||
b8a2486f NTND |
47 | struct thread_local { |
48 | #ifndef NO_PTHREADS | |
49 | pthread_t thread; | |
50 | #endif | |
51 | struct base_data *base_cache; | |
52 | size_t base_cache_used; | |
53 | }; | |
54 | ||
3c552873 NP |
55 | /* |
56 | * Even if sizeof(union delta_base) == 24 on 64-bit archs, we really want | |
57 | * to memcmp() only the first 20 bytes. | |
58 | */ | |
59 | #define UNION_BASE_SZ 20 | |
60 | ||
0153be05 MK |
61 | #define FLAG_LINK (1u<<20) |
62 | #define FLAG_CHECKED (1u<<21) | |
63 | ||
9cba13ca | 64 | struct delta_entry { |
53dda6ff | 65 | union delta_base base; |
636171cb | 66 | int obj_no; |
9cf6d335 SV |
67 | }; |
68 | ||
9cf6d335 SV |
69 | static struct object_entry *objects; |
70 | static struct delta_entry *deltas; | |
b8a2486f | 71 | static struct thread_local nothread_data; |
9cf6d335 SV |
72 | static int nr_objects; |
73 | static int nr_deltas; | |
636171cb | 74 | static int nr_resolved_deltas; |
b8a2486f | 75 | static int nr_threads; |
9cf6d335 | 76 | |
e42797f5 | 77 | static int from_stdin; |
0153be05 | 78 | static int strict; |
3c9af366 NP |
79 | static int verbose; |
80 | ||
dc6a0757 | 81 | static struct progress *progress; |
e42797f5 | 82 | |
2d477051 NP |
83 | /* We always read in 4kB chunks. */ |
84 | static unsigned char input_buffer[4096]; | |
d7dd0223 NP |
85 | static unsigned int input_offset, input_len; |
86 | static off_t consumed_bytes; | |
d1a0ed18 | 87 | static unsigned deepest_delta; |
9126f009 | 88 | static git_SHA_CTX input_ctx; |
ee5743ce | 89 | static uint32_t input_crc32; |
6d2fa7f1 | 90 | static int input_fd, output_fd, pack_fd; |
2d477051 | 91 | |
b8a2486f NTND |
92 | #ifndef NO_PTHREADS |
93 | ||
94 | static struct thread_local *thread_data; | |
95 | static int nr_dispatched; | |
96 | static int threads_active; | |
97 | ||
98 | static pthread_mutex_t read_mutex; | |
99 | #define read_lock() lock_mutex(&read_mutex) | |
100 | #define read_unlock() unlock_mutex(&read_mutex) | |
101 | ||
102 | static pthread_mutex_t counter_mutex; | |
103 | #define counter_lock() lock_mutex(&counter_mutex) | |
104 | #define counter_unlock() unlock_mutex(&counter_mutex) | |
105 | ||
106 | static pthread_mutex_t work_mutex; | |
107 | #define work_lock() lock_mutex(&work_mutex) | |
108 | #define work_unlock() unlock_mutex(&work_mutex) | |
109 | ||
110 | static pthread_key_t key; | |
111 | ||
112 | static inline void lock_mutex(pthread_mutex_t *mutex) | |
113 | { | |
114 | if (threads_active) | |
115 | pthread_mutex_lock(mutex); | |
116 | } | |
117 | ||
118 | static inline void unlock_mutex(pthread_mutex_t *mutex) | |
119 | { | |
120 | if (threads_active) | |
121 | pthread_mutex_unlock(mutex); | |
122 | } | |
123 | ||
124 | /* | |
125 | * Mutex and conditional variable can't be statically-initialized on Windows. | |
126 | */ | |
127 | static void init_thread(void) | |
128 | { | |
129 | init_recursive_mutex(&read_mutex); | |
130 | pthread_mutex_init(&counter_mutex, NULL); | |
131 | pthread_mutex_init(&work_mutex, NULL); | |
132 | pthread_key_create(&key, NULL); | |
133 | thread_data = xcalloc(nr_threads, sizeof(*thread_data)); | |
134 | threads_active = 1; | |
135 | } | |
136 | ||
137 | static void cleanup_thread(void) | |
138 | { | |
139 | if (!threads_active) | |
140 | return; | |
141 | threads_active = 0; | |
142 | pthread_mutex_destroy(&read_mutex); | |
143 | pthread_mutex_destroy(&counter_mutex); | |
144 | pthread_mutex_destroy(&work_mutex); | |
145 | pthread_key_delete(key); | |
146 | free(thread_data); | |
147 | } | |
148 | ||
149 | #else | |
150 | ||
151 | #define read_lock() | |
152 | #define read_unlock() | |
153 | ||
154 | #define counter_lock() | |
155 | #define counter_unlock() | |
156 | ||
157 | #define work_lock() | |
158 | #define work_unlock() | |
159 | ||
160 | #endif | |
161 | ||
162 | ||
0153be05 MK |
163 | static int mark_link(struct object *obj, int type, void *data) |
164 | { | |
165 | if (!obj) | |
166 | return -1; | |
167 | ||
168 | if (type != OBJ_ANY && obj->type != type) | |
c2b97ecf | 169 | die(_("object type mismatch at %s"), sha1_to_hex(obj->sha1)); |
0153be05 MK |
170 | |
171 | obj->flags |= FLAG_LINK; | |
172 | return 0; | |
173 | } | |
174 | ||
175 | /* The content of each linked object must have been checked | |
176 | or it must be already present in the object database */ | |
177 | static void check_object(struct object *obj) | |
178 | { | |
179 | if (!obj) | |
180 | return; | |
181 | ||
182 | if (!(obj->flags & FLAG_LINK)) | |
183 | return; | |
184 | ||
185 | if (!(obj->flags & FLAG_CHECKED)) { | |
186 | unsigned long size; | |
187 | int type = sha1_object_info(obj->sha1, &size); | |
188 | if (type != obj->type || type <= 0) | |
c2b97ecf | 189 | die(_("object of unexpected type")); |
0153be05 MK |
190 | obj->flags |= FLAG_CHECKED; |
191 | return; | |
192 | } | |
193 | } | |
194 | ||
195 | static void check_objects(void) | |
196 | { | |
197 | unsigned i, max; | |
198 | ||
199 | max = get_max_object_index(); | |
200 | for (i = 0; i < max; i++) | |
201 | check_object(get_indexed_object(i)); | |
202 | } | |
203 | ||
204 | ||
636171cb | 205 | /* Discard current buffer used content. */ |
a6e8a767 | 206 | static void flush(void) |
636171cb NP |
207 | { |
208 | if (input_offset) { | |
209 | if (output_fd >= 0) | |
210 | write_or_die(output_fd, input_buffer, input_offset); | |
9126f009 | 211 | git_SHA1_Update(&input_ctx, input_buffer, input_offset); |
554a2636 | 212 | memmove(input_buffer, input_buffer + input_offset, input_len); |
636171cb NP |
213 | input_offset = 0; |
214 | } | |
215 | } | |
216 | ||
2d477051 NP |
217 | /* |
218 | * Make sure at least "min" bytes are available in the buffer, and | |
219 | * return the pointer to the buffer. | |
220 | */ | |
b89c4e93 | 221 | static void *fill(int min) |
9cf6d335 | 222 | { |
2d477051 NP |
223 | if (min <= input_len) |
224 | return input_buffer + input_offset; | |
225 | if (min > sizeof(input_buffer)) | |
c2b97ecf NTND |
226 | die(Q_("cannot fill %d byte", |
227 | "cannot fill %d bytes", | |
228 | min), | |
229 | min); | |
636171cb | 230 | flush(); |
2d477051 | 231 | do { |
8a912bcb | 232 | ssize_t ret = xread(input_fd, input_buffer + input_len, |
2d477051 NP |
233 | sizeof(input_buffer) - input_len); |
234 | if (ret <= 0) { | |
235 | if (!ret) | |
c2b97ecf NTND |
236 | die(_("early EOF")); |
237 | die_errno(_("read error on input")); | |
2d477051 NP |
238 | } |
239 | input_len += ret; | |
218558af NP |
240 | if (from_stdin) |
241 | display_throughput(progress, consumed_bytes + input_len); | |
2d477051 NP |
242 | } while (input_len < min); |
243 | return input_buffer; | |
244 | } | |
245 | ||
246 | static void use(int bytes) | |
247 | { | |
248 | if (bytes > input_len) | |
c2b97ecf | 249 | die(_("used more bytes than were available")); |
ee5743ce | 250 | input_crc32 = crc32(input_crc32, input_buffer + input_offset, bytes); |
2d477051 NP |
251 | input_len -= bytes; |
252 | input_offset += bytes; | |
d7dd0223 NP |
253 | |
254 | /* make sure off_t is sufficiently large not to wrap */ | |
c03c8315 | 255 | if (signed_add_overflows(consumed_bytes, bytes)) |
c2b97ecf | 256 | die(_("pack too large for current definition of off_t")); |
2d477051 NP |
257 | consumed_bytes += bytes; |
258 | } | |
9cf6d335 | 259 | |
3bb72562 | 260 | static const char *open_pack_file(const char *pack_name) |
2d477051 | 261 | { |
e42797f5 NP |
262 | if (from_stdin) { |
263 | input_fd = 0; | |
264 | if (!pack_name) { | |
ab1900a3 ÆAB |
265 | static char tmp_file[PATH_MAX]; |
266 | output_fd = odb_mkstemp(tmp_file, sizeof(tmp_file), | |
6e180cdc | 267 | "pack/tmp_pack_XXXXXX"); |
ab1900a3 | 268 | pack_name = xstrdup(tmp_file); |
e42797f5 NP |
269 | } else |
270 | output_fd = open(pack_name, O_CREAT|O_EXCL|O_RDWR, 0600); | |
271 | if (output_fd < 0) | |
c2b97ecf | 272 | die_errno(_("unable to create '%s'"), pack_name); |
6d2fa7f1 | 273 | pack_fd = output_fd; |
e42797f5 NP |
274 | } else { |
275 | input_fd = open(pack_name, O_RDONLY); | |
276 | if (input_fd < 0) | |
c2b97ecf | 277 | die_errno(_("cannot open packfile '%s'"), pack_name); |
e42797f5 | 278 | output_fd = -1; |
6d2fa7f1 | 279 | pack_fd = input_fd; |
e42797f5 | 280 | } |
9126f009 | 281 | git_SHA1_Init(&input_ctx); |
e42797f5 | 282 | return pack_name; |
9cf6d335 SV |
283 | } |
284 | ||
285 | static void parse_pack_header(void) | |
286 | { | |
2d477051 | 287 | struct pack_header *hdr = fill(sizeof(struct pack_header)); |
9cf6d335 SV |
288 | |
289 | /* Header consistency check */ | |
9cf6d335 | 290 | if (hdr->hdr_signature != htonl(PACK_SIGNATURE)) |
c2b97ecf | 291 | die(_("pack signature mismatch")); |
d60fc1c8 | 292 | if (!pack_version_ok(hdr->hdr_version)) |
6e1c2344 RJ |
293 | die("pack version %"PRIu32" unsupported", |
294 | ntohl(hdr->hdr_version)); | |
9cf6d335 SV |
295 | |
296 | nr_objects = ntohl(hdr->hdr_entries); | |
2d477051 | 297 | use(sizeof(struct pack_header)); |
9cf6d335 SV |
298 | } |
299 | ||
a4f3131c EFL |
300 | static NORETURN void bad_object(unsigned long offset, const char *format, |
301 | ...) __attribute__((format (printf, 2, 3))); | |
9cf6d335 | 302 | |
c2e86add | 303 | static NORETURN void bad_object(unsigned long offset, const char *format, ...) |
9cf6d335 SV |
304 | { |
305 | va_list params; | |
306 | char buf[1024]; | |
307 | ||
308 | va_start(params, format); | |
309 | vsnprintf(buf, sizeof(buf), format, params); | |
310 | va_end(params); | |
c2b97ecf | 311 | die(_("pack has bad object at offset %lu: %s"), offset, buf); |
9cf6d335 SV |
312 | } |
313 | ||
b8a2486f NTND |
314 | static inline struct thread_local *get_thread_data(void) |
315 | { | |
316 | #ifndef NO_PTHREADS | |
317 | if (threads_active) | |
318 | return pthread_getspecific(key); | |
319 | assert(!threads_active && | |
320 | "This should only be reached when all threads are gone"); | |
321 | #endif | |
322 | return ¬hread_data; | |
323 | } | |
324 | ||
325 | #ifndef NO_PTHREADS | |
326 | static void set_thread_data(struct thread_local *data) | |
327 | { | |
328 | if (threads_active) | |
329 | pthread_setspecific(key, data); | |
330 | } | |
331 | #endif | |
332 | ||
2baad220 NTND |
333 | static struct base_data *alloc_base_data(void) |
334 | { | |
335 | struct base_data *base = xmalloc(sizeof(struct base_data)); | |
336 | memset(base, 0, sizeof(*base)); | |
337 | base->ref_last = -1; | |
338 | base->ofs_last = -1; | |
339 | return base; | |
340 | } | |
341 | ||
6a87ed97 NP |
342 | static void free_base_data(struct base_data *c) |
343 | { | |
344 | if (c->data) { | |
345 | free(c->data); | |
346 | c->data = NULL; | |
b8a2486f | 347 | get_thread_data()->base_cache_used -= c->size; |
6a87ed97 NP |
348 | } |
349 | } | |
350 | ||
92392b4a SP |
351 | static void prune_base_data(struct base_data *retain) |
352 | { | |
8e24cbae | 353 | struct base_data *b; |
b8a2486f NTND |
354 | struct thread_local *data = get_thread_data(); |
355 | for (b = data->base_cache; | |
356 | data->base_cache_used > delta_base_cache_limit && b; | |
92392b4a | 357 | b = b->child) { |
6a87ed97 NP |
358 | if (b->data && b != retain) |
359 | free_base_data(b); | |
92392b4a SP |
360 | } |
361 | } | |
362 | ||
4a438cab SP |
363 | static void link_base_data(struct base_data *base, struct base_data *c) |
364 | { | |
365 | if (base) | |
366 | base->child = c; | |
367 | else | |
b8a2486f | 368 | get_thread_data()->base_cache = c; |
4a438cab SP |
369 | |
370 | c->base = base; | |
371 | c->child = NULL; | |
9441b61d | 372 | if (c->data) |
b8a2486f | 373 | get_thread_data()->base_cache_used += c->size; |
92392b4a | 374 | prune_base_data(c); |
4a438cab SP |
375 | } |
376 | ||
377 | static void unlink_base_data(struct base_data *c) | |
378 | { | |
379 | struct base_data *base = c->base; | |
380 | if (base) | |
381 | base->child = NULL; | |
382 | else | |
b8a2486f | 383 | get_thread_data()->base_cache = NULL; |
6a87ed97 | 384 | free_base_data(c); |
4a438cab SP |
385 | } |
386 | ||
681b07de NTND |
387 | static int is_delta_type(enum object_type type) |
388 | { | |
389 | return (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA); | |
390 | } | |
391 | ||
392 | static void *unpack_entry_data(unsigned long offset, unsigned long size, | |
393 | enum object_type type, unsigned char *sha1) | |
9cf6d335 | 394 | { |
7ce4721a | 395 | int status; |
ef49a7a0 | 396 | git_zstream stream; |
9cf6d335 | 397 | void *buf = xmalloc(size); |
681b07de NTND |
398 | git_SHA_CTX c; |
399 | char hdr[32]; | |
400 | int hdrlen; | |
401 | ||
402 | if (!is_delta_type(type)) { | |
403 | hdrlen = sprintf(hdr, "%s %lu", typename(type), size) + 1; | |
404 | git_SHA1_Init(&c); | |
405 | git_SHA1_Update(&c, hdr, hdrlen); | |
406 | } else | |
407 | sha1 = NULL; | |
9cf6d335 SV |
408 | |
409 | memset(&stream, 0, sizeof(stream)); | |
7ce4721a | 410 | git_inflate_init(&stream); |
9cf6d335 SV |
411 | stream.next_out = buf; |
412 | stream.avail_out = size; | |
9cf6d335 | 413 | |
7ce4721a | 414 | do { |
681b07de | 415 | unsigned char *last_out = stream.next_out; |
2d477051 NP |
416 | stream.next_in = fill(1); |
417 | stream.avail_in = input_len; | |
7ce4721a NP |
418 | status = git_inflate(&stream, 0); |
419 | use(input_len - stream.avail_in); | |
681b07de NTND |
420 | if (sha1) |
421 | git_SHA1_Update(&c, last_out, stream.next_out - last_out); | |
7ce4721a NP |
422 | } while (status == Z_OK); |
423 | if (stream.total_out != size || status != Z_STREAM_END) | |
c2b97ecf | 424 | bad_object(offset, _("inflate returned %d"), status); |
39c68542 | 425 | git_inflate_end(&stream); |
681b07de NTND |
426 | if (sha1) |
427 | git_SHA1_Final(sha1, &c); | |
9cf6d335 SV |
428 | return buf; |
429 | } | |
430 | ||
681b07de NTND |
431 | static void *unpack_raw_entry(struct object_entry *obj, |
432 | union delta_base *delta_base, | |
433 | unsigned char *sha1) | |
9cf6d335 | 434 | { |
48fb7deb LT |
435 | unsigned char *p; |
436 | unsigned long size, c; | |
d7dd0223 | 437 | off_t base_offset; |
9cf6d335 | 438 | unsigned shift; |
ee5743ce | 439 | void *data; |
9cf6d335 | 440 | |
aa7e44bf | 441 | obj->idx.offset = consumed_bytes; |
1e4cd68c | 442 | input_crc32 = crc32(0, NULL, 0); |
2d477051 NP |
443 | |
444 | p = fill(1); | |
445 | c = *p; | |
446 | use(1); | |
447 | obj->type = (c >> 4) & 7; | |
9cf6d335 SV |
448 | size = (c & 15); |
449 | shift = 4; | |
450 | while (c & 0x80) { | |
2d477051 NP |
451 | p = fill(1); |
452 | c = *p; | |
453 | use(1); | |
48fb7deb | 454 | size += (c & 0x7f) << shift; |
9cf6d335 SV |
455 | shift += 7; |
456 | } | |
2d477051 | 457 | obj->size = size; |
9cf6d335 | 458 | |
2d477051 | 459 | switch (obj->type) { |
eb32d236 | 460 | case OBJ_REF_DELTA: |
2d477051 NP |
461 | hashcpy(delta_base->sha1, fill(20)); |
462 | use(20); | |
53dda6ff NP |
463 | break; |
464 | case OBJ_OFS_DELTA: | |
465 | memset(delta_base, 0, sizeof(*delta_base)); | |
2d477051 NP |
466 | p = fill(1); |
467 | c = *p; | |
468 | use(1); | |
53dda6ff NP |
469 | base_offset = c & 127; |
470 | while (c & 128) { | |
471 | base_offset += 1; | |
8723f216 | 472 | if (!base_offset || MSB(base_offset, 7)) |
c2b97ecf | 473 | bad_object(obj->idx.offset, _("offset value overflow for delta base object")); |
2d477051 NP |
474 | p = fill(1); |
475 | c = *p; | |
476 | use(1); | |
53dda6ff NP |
477 | base_offset = (base_offset << 7) + (c & 127); |
478 | } | |
aa7e44bf | 479 | delta_base->offset = obj->idx.offset - base_offset; |
d8f32556 | 480 | if (delta_base->offset <= 0 || delta_base->offset >= obj->idx.offset) |
c2b97ecf | 481 | bad_object(obj->idx.offset, _("delta base offset is out of bound")); |
53dda6ff | 482 | break; |
9cf6d335 SV |
483 | case OBJ_COMMIT: |
484 | case OBJ_TREE: | |
485 | case OBJ_BLOB: | |
486 | case OBJ_TAG: | |
9cf6d335 SV |
487 | break; |
488 | default: | |
c2b97ecf | 489 | bad_object(obj->idx.offset, _("unknown object type %d"), obj->type); |
9cf6d335 | 490 | } |
aa7e44bf | 491 | obj->hdr_size = consumed_bytes - obj->idx.offset; |
2d477051 | 492 | |
681b07de | 493 | data = unpack_entry_data(obj->idx.offset, obj->size, obj->type, sha1); |
aa7e44bf | 494 | obj->idx.crc32 = input_crc32; |
ee5743ce | 495 | return data; |
2d477051 NP |
496 | } |
497 | ||
b89c4e93 | 498 | static void *get_data_from_pack(struct object_entry *obj) |
2d477051 | 499 | { |
a91ef6e7 | 500 | off_t from = obj[0].idx.offset + obj[0].hdr_size; |
aa7e44bf | 501 | unsigned long len = obj[1].idx.offset - from; |
776ea370 | 502 | unsigned char *data, *inbuf; |
ef49a7a0 | 503 | git_zstream stream; |
776ea370 | 504 | int status; |
9cf6d335 | 505 | |
2d477051 | 506 | data = xmalloc(obj->size); |
776ea370 NP |
507 | inbuf = xmalloc((len < 64*1024) ? len : 64*1024); |
508 | ||
2d477051 | 509 | memset(&stream, 0, sizeof(stream)); |
776ea370 | 510 | git_inflate_init(&stream); |
2d477051 NP |
511 | stream.next_out = data; |
512 | stream.avail_out = obj->size; | |
776ea370 NP |
513 | |
514 | do { | |
515 | ssize_t n = (len < 64*1024) ? len : 64*1024; | |
516 | n = pread(pack_fd, inbuf, n, from); | |
517 | if (n < 0) | |
c2b97ecf | 518 | die_errno(_("cannot pread pack file")); |
776ea370 | 519 | if (!n) |
c2b97ecf NTND |
520 | die(Q_("premature end of pack file, %lu byte missing", |
521 | "premature end of pack file, %lu bytes missing", | |
522 | len), | |
523 | len); | |
776ea370 NP |
524 | from += n; |
525 | len -= n; | |
526 | stream.next_in = inbuf; | |
527 | stream.avail_in = n; | |
528 | status = git_inflate(&stream, 0); | |
529 | } while (len && status == Z_OK && !stream.avail_in); | |
530 | ||
531 | /* This has been inflated OK when first encountered, so... */ | |
532 | if (status != Z_STREAM_END || stream.total_out != obj->size) | |
c2b97ecf | 533 | die(_("serious inflate inconsistency")); |
776ea370 NP |
534 | |
535 | git_inflate_end(&stream); | |
536 | free(inbuf); | |
9cf6d335 SV |
537 | return data; |
538 | } | |
539 | ||
7218a215 JH |
540 | static int compare_delta_bases(const union delta_base *base1, |
541 | const union delta_base *base2, | |
542 | enum object_type type1, | |
543 | enum object_type type2) | |
544 | { | |
545 | int cmp = type1 - type2; | |
546 | if (cmp) | |
547 | return cmp; | |
548 | return memcmp(base1, base2, UNION_BASE_SZ); | |
549 | } | |
550 | ||
551 | static int find_delta(const union delta_base *base, enum object_type type) | |
9cf6d335 SV |
552 | { |
553 | int first = 0, last = nr_deltas; | |
554 | ||
555 | while (first < last) { | |
556 | int next = (first + last) / 2; | |
557 | struct delta_entry *delta = &deltas[next]; | |
558 | int cmp; | |
559 | ||
7218a215 JH |
560 | cmp = compare_delta_bases(base, &delta->base, |
561 | type, objects[delta->obj_no].type); | |
9cf6d335 SV |
562 | if (!cmp) |
563 | return next; | |
564 | if (cmp < 0) { | |
565 | last = next; | |
566 | continue; | |
567 | } | |
568 | first = next+1; | |
569 | } | |
570 | return -first-1; | |
571 | } | |
572 | ||
6a87ed97 | 573 | static void find_delta_children(const union delta_base *base, |
7218a215 JH |
574 | int *first_index, int *last_index, |
575 | enum object_type type) | |
9cf6d335 | 576 | { |
7218a215 | 577 | int first = find_delta(base, type); |
9cf6d335 SV |
578 | int last = first; |
579 | int end = nr_deltas - 1; | |
580 | ||
6a87ed97 NP |
581 | if (first < 0) { |
582 | *first_index = 0; | |
583 | *last_index = -1; | |
584 | return; | |
585 | } | |
3c552873 | 586 | while (first > 0 && !memcmp(&deltas[first - 1].base, base, UNION_BASE_SZ)) |
9cf6d335 | 587 | --first; |
3c552873 | 588 | while (last < end && !memcmp(&deltas[last + 1].base, base, UNION_BASE_SZ)) |
9cf6d335 SV |
589 | ++last; |
590 | *first_index = first; | |
591 | *last_index = last; | |
9cf6d335 SV |
592 | } |
593 | ||
594 | static void sha1_object(const void *data, unsigned long size, | |
681b07de | 595 | enum object_type type, const unsigned char *sha1) |
9cf6d335 | 596 | { |
b8a2486f | 597 | read_lock(); |
9096c660 | 598 | if (has_sha1_file(sha1)) { |
8685da42 NP |
599 | void *has_data; |
600 | enum object_type has_type; | |
601 | unsigned long has_size; | |
602 | has_data = read_sha1_file(sha1, &has_type, &has_size); | |
b8a2486f | 603 | read_unlock(); |
8685da42 | 604 | if (!has_data) |
c2b97ecf | 605 | die(_("cannot read existing object %s"), sha1_to_hex(sha1)); |
8685da42 NP |
606 | if (size != has_size || type != has_type || |
607 | memcmp(data, has_data, size) != 0) | |
c2b97ecf | 608 | die(_("SHA1 COLLISION FOUND WITH %s !"), sha1_to_hex(sha1)); |
bbf4b41b | 609 | free(has_data); |
b8a2486f NTND |
610 | } else |
611 | read_unlock(); | |
612 | ||
0153be05 | 613 | if (strict) { |
b8a2486f | 614 | read_lock(); |
0153be05 MK |
615 | if (type == OBJ_BLOB) { |
616 | struct blob *blob = lookup_blob(sha1); | |
617 | if (blob) | |
618 | blob->object.flags |= FLAG_CHECKED; | |
619 | else | |
c2b97ecf | 620 | die(_("invalid blob object %s"), sha1_to_hex(sha1)); |
0153be05 MK |
621 | } else { |
622 | struct object *obj; | |
623 | int eaten; | |
624 | void *buf = (void *) data; | |
625 | ||
626 | /* | |
627 | * we do not need to free the memory here, as the | |
628 | * buf is deleted by the caller. | |
629 | */ | |
630 | obj = parse_object_buffer(sha1, type, size, buf, &eaten); | |
631 | if (!obj) | |
c2b97ecf | 632 | die(_("invalid %s"), typename(type)); |
0153be05 | 633 | if (fsck_object(obj, 1, fsck_error_function)) |
c2b97ecf | 634 | die(_("Error in object")); |
2af202be | 635 | if (fsck_walk(obj, mark_link, NULL)) |
c2b97ecf | 636 | die(_("Not all child objects of %s are reachable"), sha1_to_hex(obj->sha1)); |
0153be05 MK |
637 | |
638 | if (obj->type == OBJ_TREE) { | |
639 | struct tree *item = (struct tree *) obj; | |
640 | item->buffer = NULL; | |
641 | } | |
642 | if (obj->type == OBJ_COMMIT) { | |
643 | struct commit *commit = (struct commit *) obj; | |
644 | commit->buffer = NULL; | |
645 | } | |
646 | obj->flags |= FLAG_CHECKED; | |
647 | } | |
b8a2486f | 648 | read_unlock(); |
0153be05 | 649 | } |
9cf6d335 SV |
650 | } |
651 | ||
20e95d0a NTND |
652 | /* |
653 | * This function is part of find_unresolved_deltas(). There are two | |
654 | * walkers going in the opposite ways. | |
655 | * | |
656 | * The first one in find_unresolved_deltas() traverses down from | |
657 | * parent node to children, deflating nodes along the way. However, | |
658 | * memory for deflated nodes is limited by delta_base_cache_limit, so | |
659 | * at some point parent node's deflated content may be freed. | |
660 | * | |
661 | * The second walker is this function, which goes from current node up | |
662 | * to top parent if necessary to deflate the node. In normal | |
663 | * situation, its parent node would be already deflated, so it just | |
664 | * needs to apply delta. | |
665 | * | |
666 | * In the worst case scenario, parent node is no longer deflated because | |
667 | * we're running out of delta_base_cache_limit; we need to re-deflate | |
668 | * parents, possibly up to the top base. | |
669 | * | |
670 | * All deflated objects here are subject to be freed if we exceed | |
671 | * delta_base_cache_limit, just like in find_unresolved_deltas(), we | |
672 | * just need to make sure the last node is not freed. | |
673 | */ | |
92392b4a SP |
674 | static void *get_base_data(struct base_data *c) |
675 | { | |
676 | if (!c->data) { | |
677 | struct object_entry *obj = c->obj; | |
20e95d0a NTND |
678 | struct base_data **delta = NULL; |
679 | int delta_nr = 0, delta_alloc = 0; | |
92392b4a | 680 | |
20e95d0a NTND |
681 | while (is_delta_type(c->obj->type) && !c->data) { |
682 | ALLOC_GROW(delta, delta_nr + 1, delta_alloc); | |
683 | delta[delta_nr++] = c; | |
684 | c = c->base; | |
685 | } | |
686 | if (!delta_nr) { | |
687 | c->data = get_data_from_pack(obj); | |
688 | c->size = obj->size; | |
b8a2486f | 689 | get_thread_data()->base_cache_used += c->size; |
20e95d0a NTND |
690 | prune_base_data(c); |
691 | } | |
692 | for (; delta_nr > 0; delta_nr--) { | |
693 | void *base, *raw; | |
694 | c = delta[delta_nr - 1]; | |
695 | obj = c->obj; | |
696 | base = get_base_data(c->base); | |
697 | raw = get_data_from_pack(obj); | |
92392b4a SP |
698 | c->data = patch_delta( |
699 | base, c->base->size, | |
700 | raw, obj->size, | |
701 | &c->size); | |
702 | free(raw); | |
703 | if (!c->data) | |
c2b97ecf | 704 | bad_object(obj->idx.offset, _("failed to apply delta")); |
b8a2486f | 705 | get_thread_data()->base_cache_used += c->size; |
20e95d0a | 706 | prune_base_data(c); |
9441b61d | 707 | } |
20e95d0a | 708 | free(delta); |
92392b4a SP |
709 | } |
710 | return c->data; | |
711 | } | |
712 | ||
f41aebd4 | 713 | static void resolve_delta(struct object_entry *delta_obj, |
9441b61d | 714 | struct base_data *base, struct base_data *result) |
9cf6d335 | 715 | { |
ce3f6dc6 | 716 | void *base_data, *delta_data; |
9cf6d335 | 717 | |
ce3f6dc6 | 718 | delta_obj->real_type = base->obj->real_type; |
38a45561 | 719 | delta_obj->delta_depth = base->obj->delta_depth + 1; |
d1a0ed18 JH |
720 | if (deepest_delta < delta_obj->delta_depth) |
721 | deepest_delta = delta_obj->delta_depth; | |
38a45561 | 722 | delta_obj->base_object_no = base->obj - objects; |
636171cb | 723 | delta_data = get_data_from_pack(delta_obj); |
ce3f6dc6 | 724 | base_data = get_base_data(base); |
9441b61d | 725 | result->obj = delta_obj; |
ce3f6dc6 NP |
726 | result->data = patch_delta(base_data, base->size, |
727 | delta_data, delta_obj->size, &result->size); | |
9cf6d335 | 728 | free(delta_data); |
9441b61d | 729 | if (!result->data) |
c2b97ecf | 730 | bad_object(delta_obj->idx.offset, _("failed to apply delta")); |
681b07de NTND |
731 | hash_sha1_file(result->data, result->size, |
732 | typename(delta_obj->real_type), delta_obj->idx.sha1); | |
9441b61d NP |
733 | sha1_object(result->data, result->size, delta_obj->real_type, |
734 | delta_obj->idx.sha1); | |
b8a2486f | 735 | counter_lock(); |
636171cb | 736 | nr_resolved_deltas++; |
b8a2486f | 737 | counter_unlock(); |
9441b61d NP |
738 | } |
739 | ||
2baad220 NTND |
740 | static struct base_data *find_unresolved_deltas_1(struct base_data *base, |
741 | struct base_data *prev_base) | |
9441b61d | 742 | { |
2baad220 | 743 | if (base->ref_last == -1 && base->ofs_last == -1) { |
9441b61d NP |
744 | union delta_base base_spec; |
745 | ||
746 | hashcpy(base_spec.sha1, base->obj->idx.sha1); | |
7218a215 | 747 | find_delta_children(&base_spec, |
2baad220 | 748 | &base->ref_first, &base->ref_last, OBJ_REF_DELTA); |
53dda6ff | 749 | |
9441b61d NP |
750 | memset(&base_spec, 0, sizeof(base_spec)); |
751 | base_spec.offset = base->obj->idx.offset; | |
7218a215 | 752 | find_delta_children(&base_spec, |
2baad220 | 753 | &base->ofs_first, &base->ofs_last, OBJ_OFS_DELTA); |
4a438cab | 754 | |
2baad220 NTND |
755 | if (base->ref_last == -1 && base->ofs_last == -1) { |
756 | free(base->data); | |
757 | return NULL; | |
758 | } | |
53dda6ff | 759 | |
2baad220 NTND |
760 | link_base_data(prev_base, base); |
761 | } | |
4a438cab | 762 | |
2baad220 NTND |
763 | if (base->ref_first <= base->ref_last) { |
764 | struct object_entry *child = objects + deltas[base->ref_first].obj_no; | |
765 | struct base_data *result = alloc_base_data(); | |
7218a215 JH |
766 | |
767 | assert(child->real_type == OBJ_REF_DELTA); | |
2baad220 NTND |
768 | resolve_delta(child, base, result); |
769 | if (base->ref_first == base->ref_last && base->ofs_last == -1) | |
7218a215 | 770 | free_base_data(base); |
2baad220 NTND |
771 | |
772 | base->ref_first++; | |
773 | return result; | |
53dda6ff NP |
774 | } |
775 | ||
2baad220 NTND |
776 | if (base->ofs_first <= base->ofs_last) { |
777 | struct object_entry *child = objects + deltas[base->ofs_first].obj_no; | |
778 | struct base_data *result = alloc_base_data(); | |
7218a215 JH |
779 | |
780 | assert(child->real_type == OBJ_OFS_DELTA); | |
2baad220 NTND |
781 | resolve_delta(child, base, result); |
782 | if (base->ofs_first == base->ofs_last) | |
7218a215 | 783 | free_base_data(base); |
2baad220 NTND |
784 | |
785 | base->ofs_first++; | |
786 | return result; | |
9cf6d335 | 787 | } |
53dda6ff | 788 | |
9441b61d | 789 | unlink_base_data(base); |
2baad220 NTND |
790 | return NULL; |
791 | } | |
792 | ||
793 | static void find_unresolved_deltas(struct base_data *base) | |
794 | { | |
795 | struct base_data *new_base, *prev_base = NULL; | |
796 | for (;;) { | |
797 | new_base = find_unresolved_deltas_1(base, prev_base); | |
798 | ||
799 | if (new_base) { | |
800 | prev_base = base; | |
801 | base = new_base; | |
802 | } else { | |
803 | free(base); | |
804 | base = prev_base; | |
805 | if (!base) | |
806 | return; | |
807 | prev_base = base->base; | |
808 | } | |
809 | } | |
9cf6d335 SV |
810 | } |
811 | ||
812 | static int compare_delta_entry(const void *a, const void *b) | |
813 | { | |
814 | const struct delta_entry *delta_a = a; | |
815 | const struct delta_entry *delta_b = b; | |
7218a215 JH |
816 | |
817 | /* group by type (ref vs ofs) and then by value (sha-1 or offset) */ | |
818 | return compare_delta_bases(&delta_a->base, &delta_b->base, | |
819 | objects[delta_a->obj_no].type, | |
820 | objects[delta_b->obj_no].type); | |
9cf6d335 SV |
821 | } |
822 | ||
5272f755 NTND |
823 | static void resolve_base(struct object_entry *obj) |
824 | { | |
825 | struct base_data *base_obj = alloc_base_data(); | |
826 | base_obj->obj = obj; | |
827 | base_obj->data = NULL; | |
828 | find_unresolved_deltas(base_obj); | |
829 | } | |
830 | ||
b8a2486f NTND |
831 | #ifndef NO_PTHREADS |
832 | static void *threaded_second_pass(void *data) | |
833 | { | |
834 | set_thread_data(data); | |
835 | for (;;) { | |
836 | int i; | |
837 | work_lock(); | |
838 | display_progress(progress, nr_resolved_deltas); | |
839 | while (nr_dispatched < nr_objects && | |
840 | is_delta_type(objects[nr_dispatched].type)) | |
841 | nr_dispatched++; | |
842 | if (nr_dispatched >= nr_objects) { | |
843 | work_unlock(); | |
844 | break; | |
845 | } | |
846 | i = nr_dispatched++; | |
847 | work_unlock(); | |
848 | ||
849 | resolve_base(&objects[i]); | |
850 | } | |
851 | return NULL; | |
852 | } | |
853 | #endif | |
854 | ||
5272f755 NTND |
855 | /* |
856 | * First pass: | |
857 | * - find locations of all objects; | |
858 | * - calculate SHA1 of all non-delta objects; | |
859 | * - remember base (SHA1 or offset) for all deltas. | |
860 | */ | |
2d477051 | 861 | static void parse_pack_objects(unsigned char *sha1) |
9cf6d335 | 862 | { |
96a02f8f | 863 | int i; |
53dda6ff | 864 | struct delta_entry *delta = deltas; |
2d477051 | 865 | struct stat st; |
9cf6d335 | 866 | |
13aaf148 | 867 | if (verbose) |
29e63ed3 | 868 | progress = start_progress( |
c2b97ecf | 869 | from_stdin ? _("Receiving objects") : _("Indexing objects"), |
29e63ed3 | 870 | nr_objects); |
9cf6d335 SV |
871 | for (i = 0; i < nr_objects; i++) { |
872 | struct object_entry *obj = &objects[i]; | |
681b07de | 873 | void *data = unpack_raw_entry(obj, &delta->base, obj->idx.sha1); |
9cf6d335 | 874 | obj->real_type = obj->type; |
4f8ec74e | 875 | if (is_delta_type(obj->type)) { |
53dda6ff | 876 | nr_deltas++; |
636171cb | 877 | delta->obj_no = i; |
53dda6ff | 878 | delta++; |
9cf6d335 | 879 | } else |
aa7e44bf | 880 | sha1_object(data, obj->size, obj->type, obj->idx.sha1); |
9cf6d335 | 881 | free(data); |
4d4fcc54 | 882 | display_progress(progress, i+1); |
9cf6d335 | 883 | } |
aa7e44bf | 884 | objects[i].idx.offset = consumed_bytes; |
4d4fcc54 | 885 | stop_progress(&progress); |
2d477051 NP |
886 | |
887 | /* Check pack integrity */ | |
636171cb | 888 | flush(); |
9126f009 | 889 | git_SHA1_Final(sha1, &input_ctx); |
2d477051 | 890 | if (hashcmp(fill(20), sha1)) |
c2b97ecf | 891 | die(_("pack is corrupted (SHA1 mismatch)")); |
9bee2478 | 892 | use(20); |
2d477051 NP |
893 | |
894 | /* If input_fd is a file, we should have reached its end now. */ | |
895 | if (fstat(input_fd, &st)) | |
c2b97ecf | 896 | die_errno(_("cannot fstat packfile")); |
fa257b05 JS |
897 | if (S_ISREG(st.st_mode) && |
898 | lseek(input_fd, 0, SEEK_CUR) - input_len != st.st_size) | |
c2b97ecf | 899 | die(_("pack has junk at the end")); |
5272f755 NTND |
900 | } |
901 | ||
902 | /* | |
903 | * Second pass: | |
904 | * - for all non-delta objects, look if it is used as a base for | |
905 | * deltas; | |
906 | * - if used as a base, uncompress the object and apply all deltas, | |
907 | * recursively checking if the resulting object is used as a base | |
908 | * for some more deltas. | |
909 | */ | |
910 | static void resolve_deltas(void) | |
911 | { | |
912 | int i; | |
9cf6d335 | 913 | |
3c9af366 NP |
914 | if (!nr_deltas) |
915 | return; | |
916 | ||
53dda6ff | 917 | /* Sort deltas by base SHA1/offset for fast searching */ |
9cf6d335 SV |
918 | qsort(deltas, nr_deltas, sizeof(struct delta_entry), |
919 | compare_delta_entry); | |
920 | ||
13aaf148 | 921 | if (verbose) |
c2b97ecf | 922 | progress = start_progress(_("Resolving deltas"), nr_deltas); |
b8a2486f NTND |
923 | |
924 | #ifndef NO_PTHREADS | |
925 | nr_dispatched = 0; | |
926 | if (nr_threads > 1 || getenv("GIT_FORCE_THREADS")) { | |
927 | init_thread(); | |
928 | for (i = 0; i < nr_threads; i++) { | |
929 | int ret = pthread_create(&thread_data[i].thread, NULL, | |
930 | threaded_second_pass, thread_data + i); | |
931 | if (ret) | |
932 | die("unable to create thread: %s", strerror(ret)); | |
933 | } | |
934 | for (i = 0; i < nr_threads; i++) | |
935 | pthread_join(thread_data[i].thread, NULL); | |
936 | cleanup_thread(); | |
937 | return; | |
938 | } | |
939 | #endif | |
940 | ||
9cf6d335 SV |
941 | for (i = 0; i < nr_objects; i++) { |
942 | struct object_entry *obj = &objects[i]; | |
9cf6d335 | 943 | |
4f8ec74e | 944 | if (is_delta_type(obj->type)) |
9cf6d335 | 945 | continue; |
5272f755 | 946 | resolve_base(obj); |
4d4fcc54 | 947 | display_progress(progress, nr_resolved_deltas); |
9cf6d335 | 948 | } |
636171cb NP |
949 | } |
950 | ||
5272f755 NTND |
951 | /* |
952 | * Third pass: | |
953 | * - append objects to convert thin pack to full pack if required | |
954 | * - write the final 20-byte SHA-1 | |
955 | */ | |
956 | static void fix_unresolved_deltas(struct sha1file *f, int nr_unresolved); | |
957 | static void conclude_pack(int fix_thin_pack, const char *curr_pack, unsigned char *pack_sha1) | |
958 | { | |
959 | if (nr_deltas == nr_resolved_deltas) { | |
960 | stop_progress(&progress); | |
961 | /* Flush remaining pack final 20-byte SHA1. */ | |
962 | flush(); | |
963 | return; | |
964 | } | |
965 | ||
966 | if (fix_thin_pack) { | |
967 | struct sha1file *f; | |
968 | unsigned char read_sha1[20], tail_sha1[20]; | |
969 | char msg[48]; | |
970 | int nr_unresolved = nr_deltas - nr_resolved_deltas; | |
971 | int nr_objects_initial = nr_objects; | |
972 | if (nr_unresolved <= 0) | |
cc13431a | 973 | die(_("confusion beyond insanity")); |
5272f755 NTND |
974 | objects = xrealloc(objects, |
975 | (nr_objects + nr_unresolved + 1) | |
976 | * sizeof(*objects)); | |
977 | f = sha1fd(output_fd, curr_pack); | |
978 | fix_unresolved_deltas(f, nr_unresolved); | |
979 | sprintf(msg, "completed with %d local objects", | |
980 | nr_objects - nr_objects_initial); | |
981 | stop_progress_msg(&progress, msg); | |
982 | sha1close(f, tail_sha1, 0); | |
983 | hashcpy(read_sha1, pack_sha1); | |
984 | fixup_pack_header_footer(output_fd, pack_sha1, | |
985 | curr_pack, nr_objects, | |
986 | read_sha1, consumed_bytes-20); | |
987 | if (hashcmp(read_sha1, tail_sha1) != 0) | |
988 | die("Unexpected tail checksum for %s " | |
989 | "(disk corruption?)", curr_pack); | |
990 | } | |
991 | if (nr_deltas != nr_resolved_deltas) | |
cc13431a JH |
992 | die(Q_("pack has %d unresolved delta", |
993 | "pack has %d unresolved deltas", | |
994 | nr_deltas - nr_resolved_deltas), | |
5272f755 NTND |
995 | nr_deltas - nr_resolved_deltas); |
996 | } | |
997 | ||
8522148f | 998 | static int write_compressed(struct sha1file *f, void *in, unsigned int size) |
636171cb | 999 | { |
ef49a7a0 | 1000 | git_zstream stream; |
7734d7f2 NP |
1001 | int status; |
1002 | unsigned char outbuf[4096]; | |
636171cb NP |
1003 | |
1004 | memset(&stream, 0, sizeof(stream)); | |
55bb5c91 | 1005 | git_deflate_init(&stream, zlib_compression_level); |
636171cb NP |
1006 | stream.next_in = in; |
1007 | stream.avail_in = size; | |
636171cb | 1008 | |
7734d7f2 NP |
1009 | do { |
1010 | stream.next_out = outbuf; | |
1011 | stream.avail_out = sizeof(outbuf); | |
55bb5c91 | 1012 | status = git_deflate(&stream, Z_FINISH); |
7734d7f2 NP |
1013 | sha1write(f, outbuf, sizeof(outbuf) - stream.avail_out); |
1014 | } while (status == Z_OK); | |
1015 | ||
1016 | if (status != Z_STREAM_END) | |
c2b97ecf | 1017 | die(_("unable to deflate appended object (%d)"), status); |
636171cb | 1018 | size = stream.total_out; |
55bb5c91 | 1019 | git_deflate_end(&stream); |
636171cb NP |
1020 | return size; |
1021 | } | |
1022 | ||
8522148f | 1023 | static struct object_entry *append_obj_to_pack(struct sha1file *f, |
03993e13 | 1024 | const unsigned char *sha1, void *buf, |
636171cb NP |
1025 | unsigned long size, enum object_type type) |
1026 | { | |
1027 | struct object_entry *obj = &objects[nr_objects++]; | |
1028 | unsigned char header[10]; | |
1029 | unsigned long s = size; | |
1030 | int n = 0; | |
1031 | unsigned char c = (type << 4) | (s & 15); | |
1032 | s >>= 4; | |
1033 | while (s) { | |
1034 | header[n++] = c | 0x80; | |
1035 | c = s & 0x7f; | |
1036 | s >>= 7; | |
1037 | } | |
1038 | header[n++] = c; | |
8522148f NP |
1039 | crc32_begin(f); |
1040 | sha1write(f, header, n); | |
72de2883 BS |
1041 | obj[0].size = size; |
1042 | obj[0].hdr_size = n; | |
1043 | obj[0].type = type; | |
1044 | obj[0].real_type = type; | |
aa7e44bf | 1045 | obj[1].idx.offset = obj[0].idx.offset + n; |
8522148f NP |
1046 | obj[1].idx.offset += write_compressed(f, buf, size); |
1047 | obj[0].idx.crc32 = crc32_end(f); | |
838cd346 | 1048 | sha1flush(f); |
aa7e44bf | 1049 | hashcpy(obj->idx.sha1, sha1); |
03993e13 | 1050 | return obj; |
636171cb NP |
1051 | } |
1052 | ||
1053 | static int delta_pos_compare(const void *_a, const void *_b) | |
1054 | { | |
1055 | struct delta_entry *a = *(struct delta_entry **)_a; | |
1056 | struct delta_entry *b = *(struct delta_entry **)_b; | |
1057 | return a->obj_no - b->obj_no; | |
1058 | } | |
9cf6d335 | 1059 | |
8522148f | 1060 | static void fix_unresolved_deltas(struct sha1file *f, int nr_unresolved) |
636171cb NP |
1061 | { |
1062 | struct delta_entry **sorted_by_pos; | |
96a02f8f | 1063 | int i, n = 0; |
636171cb NP |
1064 | |
1065 | /* | |
1066 | * Since many unresolved deltas may well be themselves base objects | |
1067 | * for more unresolved deltas, we really want to include the | |
1068 | * smallest number of base objects that would cover as much delta | |
1069 | * as possible by picking the | |
1070 | * trunc deltas first, allowing for other deltas to resolve without | |
1071 | * additional base objects. Since most base objects are to be found | |
1072 | * before deltas depending on them, a good heuristic is to start | |
1073 | * resolving deltas in the same order as their position in the pack. | |
1074 | */ | |
1075 | sorted_by_pos = xmalloc(nr_unresolved * sizeof(*sorted_by_pos)); | |
9cf6d335 | 1076 | for (i = 0; i < nr_deltas; i++) { |
636171cb NP |
1077 | if (objects[deltas[i].obj_no].real_type != OBJ_REF_DELTA) |
1078 | continue; | |
1079 | sorted_by_pos[n++] = &deltas[i]; | |
9cf6d335 | 1080 | } |
636171cb NP |
1081 | qsort(sorted_by_pos, n, sizeof(*sorted_by_pos), delta_pos_compare); |
1082 | ||
1083 | for (i = 0; i < n; i++) { | |
1084 | struct delta_entry *d = sorted_by_pos[i]; | |
21666f1a | 1085 | enum object_type type; |
2baad220 | 1086 | struct base_data *base_obj = alloc_base_data(); |
636171cb NP |
1087 | |
1088 | if (objects[d->obj_no].real_type != OBJ_REF_DELTA) | |
1089 | continue; | |
2baad220 NTND |
1090 | base_obj->data = read_sha1_file(d->base.sha1, &type, &base_obj->size); |
1091 | if (!base_obj->data) | |
636171cb | 1092 | continue; |
636171cb | 1093 | |
2baad220 NTND |
1094 | if (check_sha1_signature(d->base.sha1, base_obj->data, |
1095 | base_obj->size, typename(type))) | |
c2b97ecf | 1096 | die(_("local object %s is corrupt"), sha1_to_hex(d->base.sha1)); |
2baad220 NTND |
1097 | base_obj->obj = append_obj_to_pack(f, d->base.sha1, |
1098 | base_obj->data, base_obj->size, type); | |
1099 | find_unresolved_deltas(base_obj); | |
4d4fcc54 | 1100 | display_progress(progress, nr_resolved_deltas); |
636171cb NP |
1101 | } |
1102 | free(sorted_by_pos); | |
1103 | } | |
1104 | ||
e42797f5 NP |
1105 | static void final(const char *final_pack_name, const char *curr_pack_name, |
1106 | const char *final_index_name, const char *curr_index_name, | |
b8077709 | 1107 | const char *keep_name, const char *keep_msg, |
e42797f5 NP |
1108 | unsigned char *sha1) |
1109 | { | |
3a55602e | 1110 | const char *report = "pack"; |
e42797f5 NP |
1111 | char name[PATH_MAX]; |
1112 | int err; | |
1113 | ||
1114 | if (!from_stdin) { | |
1115 | close(input_fd); | |
1116 | } else { | |
4c81b03e | 1117 | fsync_or_die(output_fd, curr_pack_name); |
e42797f5 NP |
1118 | err = close(output_fd); |
1119 | if (err) | |
c2b97ecf | 1120 | die_errno(_("error while closing pack file")); |
e42797f5 NP |
1121 | } |
1122 | ||
b8077709 SP |
1123 | if (keep_msg) { |
1124 | int keep_fd, keep_msg_len = strlen(keep_msg); | |
6e180cdc JH |
1125 | |
1126 | if (!keep_name) | |
1127 | keep_fd = odb_pack_keep(name, sizeof(name), sha1); | |
1128 | else | |
1129 | keep_fd = open(keep_name, O_RDWR|O_CREAT|O_EXCL, 0600); | |
1130 | ||
9ca4a201 NP |
1131 | if (keep_fd < 0) { |
1132 | if (errno != EEXIST) | |
c2b97ecf | 1133 | die_errno(_("cannot write keep file '%s'"), |
d824cbba | 1134 | keep_name); |
9ca4a201 NP |
1135 | } else { |
1136 | if (keep_msg_len > 0) { | |
1137 | write_or_die(keep_fd, keep_msg, keep_msg_len); | |
1138 | write_or_die(keep_fd, "\n", 1); | |
1139 | } | |
91c8d590 | 1140 | if (close(keep_fd) != 0) |
c2b97ecf | 1141 | die_errno(_("cannot close written keep file '%s'"), |
d824cbba | 1142 | keep_name); |
576162a4 | 1143 | report = "keep"; |
b8077709 | 1144 | } |
b8077709 SP |
1145 | } |
1146 | ||
e42797f5 NP |
1147 | if (final_pack_name != curr_pack_name) { |
1148 | if (!final_pack_name) { | |
1149 | snprintf(name, sizeof(name), "%s/pack/pack-%s.pack", | |
1150 | get_object_directory(), sha1_to_hex(sha1)); | |
1151 | final_pack_name = name; | |
1152 | } | |
1153 | if (move_temp_to_file(curr_pack_name, final_pack_name)) | |
c2b97ecf | 1154 | die(_("cannot store pack file")); |
fb8b1936 | 1155 | } else if (from_stdin) |
33b65030 | 1156 | chmod(final_pack_name, 0444); |
e42797f5 | 1157 | |
e42797f5 NP |
1158 | if (final_index_name != curr_index_name) { |
1159 | if (!final_index_name) { | |
1160 | snprintf(name, sizeof(name), "%s/pack/pack-%s.idx", | |
1161 | get_object_directory(), sha1_to_hex(sha1)); | |
1162 | final_index_name = name; | |
1163 | } | |
1164 | if (move_temp_to_file(curr_index_name, final_index_name)) | |
c2b97ecf | 1165 | die(_("cannot store index file")); |
fb8b1936 JH |
1166 | } else |
1167 | chmod(final_index_name, 0444); | |
576162a4 NP |
1168 | |
1169 | if (!from_stdin) { | |
1170 | printf("%s\n", sha1_to_hex(sha1)); | |
1171 | } else { | |
1172 | char buf[48]; | |
1173 | int len = snprintf(buf, sizeof(buf), "%s\t%s\n", | |
1174 | report, sha1_to_hex(sha1)); | |
d1b2ddc8 | 1175 | write_or_die(1, buf, len); |
576162a4 NP |
1176 | |
1177 | /* | |
1178 | * Let's just mimic git-unpack-objects here and write | |
1179 | * the last part of the input buffer to stdout. | |
1180 | */ | |
1181 | while (input_len) { | |
1182 | err = xwrite(1, input_buffer + input_offset, input_len); | |
1183 | if (err <= 0) | |
1184 | break; | |
1185 | input_len -= err; | |
1186 | input_offset += err; | |
1187 | } | |
1188 | } | |
9cf6d335 SV |
1189 | } |
1190 | ||
ef90d6d4 | 1191 | static int git_index_pack_config(const char *k, const char *v, void *cb) |
4d00bda2 | 1192 | { |
ebcfb379 JH |
1193 | struct pack_idx_option *opts = cb; |
1194 | ||
4d00bda2 | 1195 | if (!strcmp(k, "pack.indexversion")) { |
ebcfb379 JH |
1196 | opts->version = git_config_int(k, v); |
1197 | if (opts->version > 2) | |
1198 | die("bad pack.indexversion=%"PRIu32, opts->version); | |
4d00bda2 NP |
1199 | return 0; |
1200 | } | |
b8a2486f NTND |
1201 | if (!strcmp(k, "pack.threads")) { |
1202 | nr_threads = git_config_int(k, v); | |
1203 | if (nr_threads < 0) | |
1204 | die("invalid number of threads specified (%d)", | |
1205 | nr_threads); | |
1206 | #ifdef NO_PTHREADS | |
1207 | if (nr_threads != 1) | |
1208 | warning("no threads support, ignoring %s", k); | |
1209 | nr_threads = 1; | |
1210 | #endif | |
1211 | return 0; | |
1212 | } | |
ef90d6d4 | 1213 | return git_default_config(k, v, cb); |
4d00bda2 NP |
1214 | } |
1215 | ||
3c9fc074 JH |
1216 | static int cmp_uint32(const void *a_, const void *b_) |
1217 | { | |
1218 | uint32_t a = *((uint32_t *)a_); | |
1219 | uint32_t b = *((uint32_t *)b_); | |
1220 | ||
1221 | return (a < b) ? -1 : (a != b); | |
1222 | } | |
1223 | ||
1224 | static void read_v2_anomalous_offsets(struct packed_git *p, | |
1225 | struct pack_idx_option *opts) | |
1226 | { | |
1227 | const uint32_t *idx1, *idx2; | |
1228 | uint32_t i; | |
1229 | ||
1230 | /* The address of the 4-byte offset table */ | |
1231 | idx1 = (((const uint32_t *)p->index_data) | |
1232 | + 2 /* 8-byte header */ | |
1233 | + 256 /* fan out */ | |
1234 | + 5 * p->num_objects /* 20-byte SHA-1 table */ | |
1235 | + p->num_objects /* CRC32 table */ | |
1236 | ); | |
1237 | ||
1238 | /* The address of the 8-byte offset table */ | |
1239 | idx2 = idx1 + p->num_objects; | |
1240 | ||
1241 | for (i = 0; i < p->num_objects; i++) { | |
1242 | uint32_t off = ntohl(idx1[i]); | |
1243 | if (!(off & 0x80000000)) | |
1244 | continue; | |
1245 | off = off & 0x7fffffff; | |
1246 | if (idx2[off * 2]) | |
1247 | continue; | |
1248 | /* | |
1249 | * The real offset is ntohl(idx2[off * 2]) in high 4 | |
1250 | * octets, and ntohl(idx2[off * 2 + 1]) in low 4 | |
1251 | * octets. But idx2[off * 2] is Zero!!! | |
1252 | */ | |
1253 | ALLOC_GROW(opts->anomaly, opts->anomaly_nr + 1, opts->anomaly_alloc); | |
1254 | opts->anomaly[opts->anomaly_nr++] = ntohl(idx2[off * 2 + 1]); | |
1255 | } | |
1256 | ||
1257 | if (1 < opts->anomaly_nr) | |
1258 | qsort(opts->anomaly, opts->anomaly_nr, sizeof(uint32_t), cmp_uint32); | |
1259 | } | |
1260 | ||
e337a04d JH |
1261 | static void read_idx_option(struct pack_idx_option *opts, const char *pack_name) |
1262 | { | |
1263 | struct packed_git *p = add_packed_git(pack_name, strlen(pack_name), 1); | |
1264 | ||
1265 | if (!p) | |
c2b97ecf | 1266 | die(_("Cannot open existing pack file '%s'"), pack_name); |
e337a04d | 1267 | if (open_pack_index(p)) |
c2b97ecf | 1268 | die(_("Cannot open existing pack idx file for '%s'"), pack_name); |
e337a04d JH |
1269 | |
1270 | /* Read the attributes from the existing idx file */ | |
1271 | opts->version = p->index_version; | |
1272 | ||
3c9fc074 JH |
1273 | if (opts->version == 2) |
1274 | read_v2_anomalous_offsets(p, opts); | |
1275 | ||
e337a04d JH |
1276 | /* |
1277 | * Get rid of the idx file as we do not need it anymore. | |
1278 | * NEEDSWORK: extract this bit from free_pack_by_name() in | |
1279 | * sha1_file.c, perhaps? It shouldn't matter very much as we | |
1280 | * know we haven't installed this pack (hence we never have | |
1281 | * read anything from it). | |
1282 | */ | |
1283 | close_pack_index(p); | |
1284 | free(p); | |
1285 | } | |
1286 | ||
38a45561 JH |
1287 | static void show_pack_info(int stat_only) |
1288 | { | |
d1a0ed18 JH |
1289 | int i, baseobjects = nr_objects - nr_deltas; |
1290 | unsigned long *chain_histogram = NULL; | |
1291 | ||
1292 | if (deepest_delta) | |
1293 | chain_histogram = xcalloc(deepest_delta, sizeof(unsigned long)); | |
1294 | ||
38a45561 JH |
1295 | for (i = 0; i < nr_objects; i++) { |
1296 | struct object_entry *obj = &objects[i]; | |
1297 | ||
d1a0ed18 JH |
1298 | if (is_delta_type(obj->type)) |
1299 | chain_histogram[obj->delta_depth - 1]++; | |
38a45561 JH |
1300 | if (stat_only) |
1301 | continue; | |
1302 | printf("%s %-6s %lu %lu %"PRIuMAX, | |
1303 | sha1_to_hex(obj->idx.sha1), | |
1304 | typename(obj->real_type), obj->size, | |
1305 | (unsigned long)(obj[1].idx.offset - obj->idx.offset), | |
1306 | (uintmax_t)obj->idx.offset); | |
1307 | if (is_delta_type(obj->type)) { | |
1308 | struct object_entry *bobj = &objects[obj->base_object_no]; | |
1309 | printf(" %u %s", obj->delta_depth, sha1_to_hex(bobj->idx.sha1)); | |
1310 | } | |
1311 | putchar('\n'); | |
1312 | } | |
d1a0ed18 JH |
1313 | |
1314 | if (baseobjects) | |
c2b97ecf NTND |
1315 | printf_ln(Q_("non delta: %d object", |
1316 | "non delta: %d objects", | |
1317 | baseobjects), | |
1318 | baseobjects); | |
d1a0ed18 JH |
1319 | for (i = 0; i < deepest_delta; i++) { |
1320 | if (!chain_histogram[i]) | |
1321 | continue; | |
c2b97ecf NTND |
1322 | printf_ln(Q_("chain length = %d: %lu object", |
1323 | "chain length = %d: %lu objects", | |
1324 | chain_histogram[i]), | |
1325 | i + 1, | |
1326 | chain_histogram[i]); | |
d1a0ed18 | 1327 | } |
38a45561 JH |
1328 | } |
1329 | ||
3bb72562 | 1330 | int cmd_index_pack(int argc, const char **argv, const char *prefix) |
9cf6d335 | 1331 | { |
38a45561 | 1332 | int i, fix_thin_pack = 0, verify = 0, stat_only = 0, stat = 0; |
3bb72562 LT |
1333 | const char *curr_pack, *curr_index; |
1334 | const char *index_name = NULL, *pack_name = NULL; | |
b8077709 SP |
1335 | const char *keep_name = NULL, *keep_msg = NULL; |
1336 | char *index_name_buf = NULL, *keep_name_buf = NULL; | |
aa7e44bf | 1337 | struct pack_idx_entry **idx_objects; |
ebcfb379 | 1338 | struct pack_idx_option opts; |
8522148f | 1339 | unsigned char pack_sha1[20]; |
9cf6d335 | 1340 | |
99caeed0 JN |
1341 | if (argc == 2 && !strcmp(argv[1], "-h")) |
1342 | usage(index_pack_usage); | |
1343 | ||
6e2a09d2 NE |
1344 | read_replace_refs = 0; |
1345 | ||
ebcfb379 JH |
1346 | reset_pack_idx_option(&opts); |
1347 | git_config(git_index_pack_config, &opts); | |
3f8099fc | 1348 | if (prefix && chdir(prefix)) |
c2b97ecf | 1349 | die(_("Cannot come back to cwd")); |
4d00bda2 | 1350 | |
9cf6d335 | 1351 | for (i = 1; i < argc; i++) { |
3bb72562 | 1352 | const char *arg = argv[i]; |
9cf6d335 SV |
1353 | |
1354 | if (*arg == '-') { | |
e42797f5 NP |
1355 | if (!strcmp(arg, "--stdin")) { |
1356 | from_stdin = 1; | |
636171cb NP |
1357 | } else if (!strcmp(arg, "--fix-thin")) { |
1358 | fix_thin_pack = 1; | |
0153be05 MK |
1359 | } else if (!strcmp(arg, "--strict")) { |
1360 | strict = 1; | |
e337a04d JH |
1361 | } else if (!strcmp(arg, "--verify")) { |
1362 | verify = 1; | |
38a45561 JH |
1363 | } else if (!strcmp(arg, "--verify-stat")) { |
1364 | verify = 1; | |
1365 | stat = 1; | |
1366 | } else if (!strcmp(arg, "--verify-stat-only")) { | |
1367 | verify = 1; | |
1368 | stat = 1; | |
1369 | stat_only = 1; | |
b8077709 SP |
1370 | } else if (!strcmp(arg, "--keep")) { |
1371 | keep_msg = ""; | |
cc44c765 | 1372 | } else if (!prefixcmp(arg, "--keep=")) { |
b8077709 | 1373 | keep_msg = arg + 7; |
b8a2486f NTND |
1374 | } else if (!prefixcmp(arg, "--threads=")) { |
1375 | char *end; | |
1376 | nr_threads = strtoul(arg+10, &end, 0); | |
1377 | if (!arg[10] || *end || nr_threads < 0) | |
1378 | usage(index_pack_usage); | |
1379 | #ifdef NO_PTHREADS | |
1380 | if (nr_threads != 1) | |
1381 | warning("no threads support, " | |
1382 | "ignoring %s", arg); | |
1383 | nr_threads = 1; | |
1384 | #endif | |
cc44c765 | 1385 | } else if (!prefixcmp(arg, "--pack_header=")) { |
bed006fb NP |
1386 | struct pack_header *hdr; |
1387 | char *c; | |
1388 | ||
1389 | hdr = (struct pack_header *)input_buffer; | |
1390 | hdr->hdr_signature = htonl(PACK_SIGNATURE); | |
1391 | hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10)); | |
1392 | if (*c != ',') | |
c2b97ecf | 1393 | die(_("bad %s"), arg); |
bed006fb NP |
1394 | hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10)); |
1395 | if (*c) | |
c2b97ecf | 1396 | die(_("bad %s"), arg); |
bed006fb | 1397 | input_len = sizeof(*hdr); |
3c9af366 NP |
1398 | } else if (!strcmp(arg, "-v")) { |
1399 | verbose = 1; | |
e42797f5 | 1400 | } else if (!strcmp(arg, "-o")) { |
9cf6d335 SV |
1401 | if (index_name || (i+1) >= argc) |
1402 | usage(index_pack_usage); | |
1403 | index_name = argv[++i]; | |
4ba7d711 NP |
1404 | } else if (!prefixcmp(arg, "--index-version=")) { |
1405 | char *c; | |
ebcfb379 JH |
1406 | opts.version = strtoul(arg + 16, &c, 10); |
1407 | if (opts.version > 2) | |
c2b97ecf | 1408 | die(_("bad %s"), arg); |
4ba7d711 | 1409 | if (*c == ',') |
ebcfb379 JH |
1410 | opts.off32_limit = strtoul(c+1, &c, 0); |
1411 | if (*c || opts.off32_limit & 0x80000000) | |
c2b97ecf | 1412 | die(_("bad %s"), arg); |
9cf6d335 SV |
1413 | } else |
1414 | usage(index_pack_usage); | |
1415 | continue; | |
1416 | } | |
1417 | ||
1418 | if (pack_name) | |
1419 | usage(index_pack_usage); | |
1420 | pack_name = arg; | |
1421 | } | |
1422 | ||
e42797f5 | 1423 | if (!pack_name && !from_stdin) |
9cf6d335 | 1424 | usage(index_pack_usage); |
636171cb | 1425 | if (fix_thin_pack && !from_stdin) |
c2b97ecf | 1426 | die(_("--fix-thin cannot be used without --stdin")); |
e42797f5 | 1427 | if (!index_name && pack_name) { |
9cf6d335 | 1428 | int len = strlen(pack_name); |
5bb1cda5 | 1429 | if (!has_extension(pack_name, ".pack")) |
c2b97ecf | 1430 | die(_("packfile name '%s' does not end with '.pack'"), |
9cf6d335 | 1431 | pack_name); |
6689f087 | 1432 | index_name_buf = xmalloc(len); |
9cf6d335 SV |
1433 | memcpy(index_name_buf, pack_name, len - 5); |
1434 | strcpy(index_name_buf + len - 5, ".idx"); | |
1435 | index_name = index_name_buf; | |
1436 | } | |
b8077709 SP |
1437 | if (keep_msg && !keep_name && pack_name) { |
1438 | int len = strlen(pack_name); | |
1439 | if (!has_extension(pack_name, ".pack")) | |
c2b97ecf | 1440 | die(_("packfile name '%s' does not end with '.pack'"), |
b8077709 SP |
1441 | pack_name); |
1442 | keep_name_buf = xmalloc(len); | |
1443 | memcpy(keep_name_buf, pack_name, len - 5); | |
1444 | strcpy(keep_name_buf + len - 5, ".keep"); | |
1445 | keep_name = keep_name_buf; | |
1446 | } | |
e337a04d JH |
1447 | if (verify) { |
1448 | if (!index_name) | |
c2b97ecf | 1449 | die(_("--verify with no packfile name given")); |
e337a04d | 1450 | read_idx_option(&opts, index_name); |
68be2fea | 1451 | opts.flags |= WRITE_IDX_VERIFY | WRITE_IDX_STRICT; |
e337a04d | 1452 | } |
68be2fea JH |
1453 | if (strict) |
1454 | opts.flags |= WRITE_IDX_STRICT; | |
9cf6d335 | 1455 | |
b8a2486f NTND |
1456 | #ifndef NO_PTHREADS |
1457 | if (!nr_threads) { | |
1458 | nr_threads = online_cpus(); | |
1459 | /* An experiment showed that more threads does not mean faster */ | |
1460 | if (nr_threads > 3) | |
1461 | nr_threads = 3; | |
1462 | } | |
1463 | #endif | |
1464 | ||
e42797f5 | 1465 | curr_pack = open_pack_file(pack_name); |
9cf6d335 | 1466 | parse_pack_header(); |
38a45561 JH |
1467 | objects = xcalloc(nr_objects + 1, sizeof(struct object_entry)); |
1468 | deltas = xcalloc(nr_objects, sizeof(struct delta_entry)); | |
8522148f | 1469 | parse_pack_objects(pack_sha1); |
5272f755 NTND |
1470 | resolve_deltas(); |
1471 | conclude_pack(fix_thin_pack, curr_pack, pack_sha1); | |
9cf6d335 | 1472 | free(deltas); |
0153be05 MK |
1473 | if (strict) |
1474 | check_objects(); | |
aa7e44bf | 1475 | |
38a45561 JH |
1476 | if (stat) |
1477 | show_pack_info(stat_only); | |
1478 | ||
aa7e44bf GB |
1479 | idx_objects = xmalloc((nr_objects) * sizeof(struct pack_idx_entry *)); |
1480 | for (i = 0; i < nr_objects; i++) | |
1481 | idx_objects[i] = &objects[i].idx; | |
ebcfb379 | 1482 | curr_index = write_idx_file(index_name, idx_objects, nr_objects, &opts, pack_sha1); |
aa7e44bf GB |
1483 | free(idx_objects); |
1484 | ||
e337a04d JH |
1485 | if (!verify) |
1486 | final(pack_name, curr_pack, | |
1487 | index_name, curr_index, | |
1488 | keep_name, keep_msg, | |
1489 | pack_sha1); | |
1490 | else | |
1491 | close(input_fd); | |
9cf6d335 SV |
1492 | free(objects); |
1493 | free(index_name_buf); | |
b8077709 | 1494 | free(keep_name_buf); |
c85228ed | 1495 | if (pack_name == NULL) |
3bb72562 | 1496 | free((void *) curr_pack); |
c85228ed | 1497 | if (index_name == NULL) |
3bb72562 | 1498 | free((void *) curr_index); |
9cf6d335 SV |
1499 | |
1500 | return 0; | |
1501 | } |