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Merge branch 'bc/sha-256-part-2'
[thirdparty/git.git] / upload-pack.c
1 #include "cache.h"
2 #include "config.h"
3 #include "refs.h"
4 #include "pkt-line.h"
5 #include "sideband.h"
6 #include "repository.h"
7 #include "object-store.h"
8 #include "tag.h"
9 #include "object.h"
10 #include "commit.h"
11 #include "diff.h"
12 #include "revision.h"
13 #include "list-objects.h"
14 #include "list-objects-filter.h"
15 #include "list-objects-filter-options.h"
16 #include "run-command.h"
17 #include "connect.h"
18 #include "sigchain.h"
19 #include "version.h"
20 #include "string-list.h"
21 #include "argv-array.h"
22 #include "prio-queue.h"
23 #include "protocol.h"
24 #include "quote.h"
25 #include "upload-pack.h"
26 #include "serve.h"
27 #include "commit-graph.h"
28 #include "commit-reach.h"
29 #include "shallow.h"
30
31 /* Remember to update object flag allocation in object.h */
32 #define THEY_HAVE (1u << 11)
33 #define OUR_REF (1u << 12)
34 #define WANTED (1u << 13)
35 #define COMMON_KNOWN (1u << 14)
36
37 #define SHALLOW (1u << 16)
38 #define NOT_SHALLOW (1u << 17)
39 #define CLIENT_SHALLOW (1u << 18)
40 #define HIDDEN_REF (1u << 19)
41
42 #define ALL_FLAGS (THEY_HAVE | OUR_REF | WANTED | COMMON_KNOWN | SHALLOW | \
43 NOT_SHALLOW | CLIENT_SHALLOW | HIDDEN_REF)
44
45 /* Enum for allowed unadvertised object request (UOR) */
46 enum allow_uor {
47 /* Allow specifying sha1 if it is a ref tip. */
48 ALLOW_TIP_SHA1 = 0x01,
49 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
50 ALLOW_REACHABLE_SHA1 = 0x02,
51 /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */
52 ALLOW_ANY_SHA1 = 0x07
53 };
54
55 /*
56 * Please annotate, and if possible group together, fields used only
57 * for protocol v0 or only for protocol v2.
58 */
59 struct upload_pack_data {
60 struct string_list symref; /* v0 only */
61 struct object_array want_obj;
62 struct object_array have_obj;
63 struct oid_array haves; /* v2 only */
64 struct string_list wanted_refs; /* v2 only */
65
66 struct object_array shallows;
67 struct string_list deepen_not;
68 struct object_array extra_edge_obj;
69 int depth;
70 timestamp_t deepen_since;
71 int deepen_rev_list;
72 int deepen_relative;
73 int keepalive;
74 int shallow_nr;
75 timestamp_t oldest_have;
76
77 unsigned int timeout; /* v0 only */
78 enum {
79 NO_MULTI_ACK = 0,
80 MULTI_ACK = 1,
81 MULTI_ACK_DETAILED = 2
82 } multi_ack; /* v0 only */
83
84 /* 0 for no sideband, otherwise DEFAULT_PACKET_MAX or LARGE_PACKET_MAX */
85 int use_sideband;
86
87 struct string_list uri_protocols;
88 enum allow_uor allow_uor;
89
90 struct list_objects_filter_options filter_options;
91
92 struct packet_writer writer;
93
94 const char *pack_objects_hook;
95
96 unsigned stateless_rpc : 1; /* v0 only */
97 unsigned no_done : 1; /* v0 only */
98 unsigned daemon_mode : 1; /* v0 only */
99 unsigned filter_capability_requested : 1; /* v0 only */
100
101 unsigned use_thin_pack : 1;
102 unsigned use_ofs_delta : 1;
103 unsigned no_progress : 1;
104 unsigned use_include_tag : 1;
105 unsigned allow_filter : 1;
106
107 unsigned done : 1; /* v2 only */
108 unsigned allow_ref_in_want : 1; /* v2 only */
109 unsigned allow_sideband_all : 1; /* v2 only */
110 };
111
112 static void upload_pack_data_init(struct upload_pack_data *data)
113 {
114 struct string_list symref = STRING_LIST_INIT_DUP;
115 struct string_list wanted_refs = STRING_LIST_INIT_DUP;
116 struct object_array want_obj = OBJECT_ARRAY_INIT;
117 struct object_array have_obj = OBJECT_ARRAY_INIT;
118 struct oid_array haves = OID_ARRAY_INIT;
119 struct object_array shallows = OBJECT_ARRAY_INIT;
120 struct string_list deepen_not = STRING_LIST_INIT_DUP;
121 struct string_list uri_protocols = STRING_LIST_INIT_DUP;
122 struct object_array extra_edge_obj = OBJECT_ARRAY_INIT;
123
124 memset(data, 0, sizeof(*data));
125 data->symref = symref;
126 data->wanted_refs = wanted_refs;
127 data->want_obj = want_obj;
128 data->have_obj = have_obj;
129 data->haves = haves;
130 data->shallows = shallows;
131 data->deepen_not = deepen_not;
132 data->uri_protocols = uri_protocols;
133 data->extra_edge_obj = extra_edge_obj;
134 packet_writer_init(&data->writer, 1);
135
136 data->keepalive = 5;
137 }
138
139 static void upload_pack_data_clear(struct upload_pack_data *data)
140 {
141 string_list_clear(&data->symref, 1);
142 string_list_clear(&data->wanted_refs, 1);
143 object_array_clear(&data->want_obj);
144 object_array_clear(&data->have_obj);
145 oid_array_clear(&data->haves);
146 object_array_clear(&data->shallows);
147 string_list_clear(&data->deepen_not, 0);
148 object_array_clear(&data->extra_edge_obj);
149 list_objects_filter_release(&data->filter_options);
150
151 free((char *)data->pack_objects_hook);
152 }
153
154 static void reset_timeout(unsigned int timeout)
155 {
156 alarm(timeout);
157 }
158
159 static void send_client_data(int fd, const char *data, ssize_t sz,
160 int use_sideband)
161 {
162 if (use_sideband) {
163 send_sideband(1, fd, data, sz, use_sideband);
164 return;
165 }
166 if (fd == 3)
167 /* emergency quit */
168 fd = 2;
169 if (fd == 2) {
170 /* XXX: are we happy to lose stuff here? */
171 xwrite(fd, data, sz);
172 return;
173 }
174 write_or_die(fd, data, sz);
175 }
176
177 static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
178 {
179 FILE *fp = cb_data;
180 if (graft->nr_parent == -1)
181 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
182 return 0;
183 }
184
185 struct output_state {
186 char buffer[8193];
187 int used;
188 unsigned packfile_uris_started : 1;
189 unsigned packfile_started : 1;
190 };
191
192 static int relay_pack_data(int pack_objects_out, struct output_state *os,
193 int use_sideband, int write_packfile_line)
194 {
195 /*
196 * We keep the last byte to ourselves
197 * in case we detect broken rev-list, so that we
198 * can leave the stream corrupted. This is
199 * unfortunate -- unpack-objects would happily
200 * accept a valid packdata with trailing garbage,
201 * so appending garbage after we pass all the
202 * pack data is not good enough to signal
203 * breakage to downstream.
204 */
205 ssize_t readsz;
206
207 readsz = xread(pack_objects_out, os->buffer + os->used,
208 sizeof(os->buffer) - os->used);
209 if (readsz < 0) {
210 return readsz;
211 }
212 os->used += readsz;
213
214 while (!os->packfile_started) {
215 char *p;
216 if (os->used >= 4 && !memcmp(os->buffer, "PACK", 4)) {
217 os->packfile_started = 1;
218 if (write_packfile_line) {
219 if (os->packfile_uris_started)
220 packet_delim(1);
221 packet_write_fmt(1, "\1packfile\n");
222 }
223 break;
224 }
225 if ((p = memchr(os->buffer, '\n', os->used))) {
226 if (!os->packfile_uris_started) {
227 os->packfile_uris_started = 1;
228 if (!write_packfile_line)
229 BUG("packfile_uris requires sideband-all");
230 packet_write_fmt(1, "\1packfile-uris\n");
231 }
232 *p = '\0';
233 packet_write_fmt(1, "\1%s\n", os->buffer);
234
235 os->used -= p - os->buffer + 1;
236 memmove(os->buffer, p + 1, os->used);
237 } else {
238 /*
239 * Incomplete line.
240 */
241 return readsz;
242 }
243 }
244
245 if (os->used > 1) {
246 send_client_data(1, os->buffer, os->used - 1, use_sideband);
247 os->buffer[0] = os->buffer[os->used - 1];
248 os->used = 1;
249 } else {
250 send_client_data(1, os->buffer, os->used, use_sideband);
251 os->used = 0;
252 }
253
254 return readsz;
255 }
256
257 static void create_pack_file(struct upload_pack_data *pack_data,
258 const struct string_list *uri_protocols)
259 {
260 struct child_process pack_objects = CHILD_PROCESS_INIT;
261 struct output_state output_state = { { 0 } };
262 char progress[128];
263 char abort_msg[] = "aborting due to possible repository "
264 "corruption on the remote side.";
265 ssize_t sz;
266 int i;
267 FILE *pipe_fd;
268
269 if (!pack_data->pack_objects_hook)
270 pack_objects.git_cmd = 1;
271 else {
272 argv_array_push(&pack_objects.args, pack_data->pack_objects_hook);
273 argv_array_push(&pack_objects.args, "git");
274 pack_objects.use_shell = 1;
275 }
276
277 if (pack_data->shallow_nr) {
278 argv_array_push(&pack_objects.args, "--shallow-file");
279 argv_array_push(&pack_objects.args, "");
280 }
281 argv_array_push(&pack_objects.args, "pack-objects");
282 argv_array_push(&pack_objects.args, "--revs");
283 if (pack_data->use_thin_pack)
284 argv_array_push(&pack_objects.args, "--thin");
285
286 argv_array_push(&pack_objects.args, "--stdout");
287 if (pack_data->shallow_nr)
288 argv_array_push(&pack_objects.args, "--shallow");
289 if (!pack_data->no_progress)
290 argv_array_push(&pack_objects.args, "--progress");
291 if (pack_data->use_ofs_delta)
292 argv_array_push(&pack_objects.args, "--delta-base-offset");
293 if (pack_data->use_include_tag)
294 argv_array_push(&pack_objects.args, "--include-tag");
295 if (pack_data->filter_options.choice) {
296 const char *spec =
297 expand_list_objects_filter_spec(&pack_data->filter_options);
298 if (pack_objects.use_shell) {
299 struct strbuf buf = STRBUF_INIT;
300 sq_quote_buf(&buf, spec);
301 argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf);
302 strbuf_release(&buf);
303 } else {
304 argv_array_pushf(&pack_objects.args, "--filter=%s",
305 spec);
306 }
307 }
308 if (uri_protocols) {
309 for (i = 0; i < uri_protocols->nr; i++)
310 argv_array_pushf(&pack_objects.args, "--uri-protocol=%s",
311 uri_protocols->items[i].string);
312 }
313
314 pack_objects.in = -1;
315 pack_objects.out = -1;
316 pack_objects.err = -1;
317
318 if (start_command(&pack_objects))
319 die("git upload-pack: unable to fork git-pack-objects");
320
321 pipe_fd = xfdopen(pack_objects.in, "w");
322
323 if (pack_data->shallow_nr)
324 for_each_commit_graft(write_one_shallow, pipe_fd);
325
326 for (i = 0; i < pack_data->want_obj.nr; i++)
327 fprintf(pipe_fd, "%s\n",
328 oid_to_hex(&pack_data->want_obj.objects[i].item->oid));
329 fprintf(pipe_fd, "--not\n");
330 for (i = 0; i < pack_data->have_obj.nr; i++)
331 fprintf(pipe_fd, "%s\n",
332 oid_to_hex(&pack_data->have_obj.objects[i].item->oid));
333 for (i = 0; i < pack_data->extra_edge_obj.nr; i++)
334 fprintf(pipe_fd, "%s\n",
335 oid_to_hex(&pack_data->extra_edge_obj.objects[i].item->oid));
336 fprintf(pipe_fd, "\n");
337 fflush(pipe_fd);
338 fclose(pipe_fd);
339
340 /* We read from pack_objects.err to capture stderr output for
341 * progress bar, and pack_objects.out to capture the pack data.
342 */
343
344 while (1) {
345 struct pollfd pfd[2];
346 int pe, pu, pollsize, polltimeout;
347 int ret;
348
349 reset_timeout(pack_data->timeout);
350
351 pollsize = 0;
352 pe = pu = -1;
353
354 if (0 <= pack_objects.out) {
355 pfd[pollsize].fd = pack_objects.out;
356 pfd[pollsize].events = POLLIN;
357 pu = pollsize;
358 pollsize++;
359 }
360 if (0 <= pack_objects.err) {
361 pfd[pollsize].fd = pack_objects.err;
362 pfd[pollsize].events = POLLIN;
363 pe = pollsize;
364 pollsize++;
365 }
366
367 if (!pollsize)
368 break;
369
370 polltimeout = pack_data->keepalive < 0
371 ? -1
372 : 1000 * pack_data->keepalive;
373
374 ret = poll(pfd, pollsize, polltimeout);
375
376 if (ret < 0) {
377 if (errno != EINTR) {
378 error_errno("poll failed, resuming");
379 sleep(1);
380 }
381 continue;
382 }
383 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
384 /* Status ready; we ship that in the side-band
385 * or dump to the standard error.
386 */
387 sz = xread(pack_objects.err, progress,
388 sizeof(progress));
389 if (0 < sz)
390 send_client_data(2, progress, sz,
391 pack_data->use_sideband);
392 else if (sz == 0) {
393 close(pack_objects.err);
394 pack_objects.err = -1;
395 }
396 else
397 goto fail;
398 /* give priority to status messages */
399 continue;
400 }
401 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
402 int result = relay_pack_data(pack_objects.out,
403 &output_state,
404 pack_data->use_sideband,
405 !!uri_protocols);
406
407 if (result == 0) {
408 close(pack_objects.out);
409 pack_objects.out = -1;
410 } else if (result < 0) {
411 goto fail;
412 }
413 }
414
415 /*
416 * We hit the keepalive timeout without saying anything; send
417 * an empty message on the data sideband just to let the other
418 * side know we're still working on it, but don't have any data
419 * yet.
420 *
421 * If we don't have a sideband channel, there's no room in the
422 * protocol to say anything, so those clients are just out of
423 * luck.
424 */
425 if (!ret && pack_data->use_sideband) {
426 static const char buf[] = "0005\1";
427 write_or_die(1, buf, 5);
428 }
429 }
430
431 if (finish_command(&pack_objects)) {
432 error("git upload-pack: git-pack-objects died with error.");
433 goto fail;
434 }
435
436 /* flush the data */
437 if (output_state.used > 0) {
438 send_client_data(1, output_state.buffer, output_state.used,
439 pack_data->use_sideband);
440 fprintf(stderr, "flushed.\n");
441 }
442 if (pack_data->use_sideband)
443 packet_flush(1);
444 return;
445
446 fail:
447 send_client_data(3, abort_msg, sizeof(abort_msg),
448 pack_data->use_sideband);
449 die("git upload-pack: %s", abort_msg);
450 }
451
452 static int do_got_oid(struct upload_pack_data *data, const struct object_id *oid)
453 {
454 int we_knew_they_have = 0;
455 struct object *o = parse_object(the_repository, oid);
456
457 if (!o)
458 die("oops (%s)", oid_to_hex(oid));
459 if (o->type == OBJ_COMMIT) {
460 struct commit_list *parents;
461 struct commit *commit = (struct commit *)o;
462 if (o->flags & THEY_HAVE)
463 we_knew_they_have = 1;
464 else
465 o->flags |= THEY_HAVE;
466 if (!data->oldest_have || (commit->date < data->oldest_have))
467 data->oldest_have = commit->date;
468 for (parents = commit->parents;
469 parents;
470 parents = parents->next)
471 parents->item->object.flags |= THEY_HAVE;
472 }
473 if (!we_knew_they_have) {
474 add_object_array(o, NULL, &data->have_obj);
475 return 1;
476 }
477 return 0;
478 }
479
480 static int got_oid(struct upload_pack_data *data,
481 const char *hex, struct object_id *oid)
482 {
483 if (get_oid_hex(hex, oid))
484 die("git upload-pack: expected SHA1 object, got '%s'", hex);
485 if (!has_object_file(oid))
486 return -1;
487 return do_got_oid(data, oid);
488 }
489
490 static int ok_to_give_up(struct upload_pack_data *data)
491 {
492 uint32_t min_generation = GENERATION_NUMBER_ZERO;
493
494 if (!data->have_obj.nr)
495 return 0;
496
497 return can_all_from_reach_with_flag(&data->want_obj, THEY_HAVE,
498 COMMON_KNOWN, data->oldest_have,
499 min_generation);
500 }
501
502 static int get_common_commits(struct upload_pack_data *data,
503 struct packet_reader *reader)
504 {
505 struct object_id oid;
506 char last_hex[GIT_MAX_HEXSZ + 1];
507 int got_common = 0;
508 int got_other = 0;
509 int sent_ready = 0;
510
511 save_commit_buffer = 0;
512
513 for (;;) {
514 const char *arg;
515
516 reset_timeout(data->timeout);
517
518 if (packet_reader_read(reader) != PACKET_READ_NORMAL) {
519 if (data->multi_ack == MULTI_ACK_DETAILED
520 && got_common
521 && !got_other
522 && ok_to_give_up(data)) {
523 sent_ready = 1;
524 packet_write_fmt(1, "ACK %s ready\n", last_hex);
525 }
526 if (data->have_obj.nr == 0 || data->multi_ack)
527 packet_write_fmt(1, "NAK\n");
528
529 if (data->no_done && sent_ready) {
530 packet_write_fmt(1, "ACK %s\n", last_hex);
531 return 0;
532 }
533 if (data->stateless_rpc)
534 exit(0);
535 got_common = 0;
536 got_other = 0;
537 continue;
538 }
539 if (skip_prefix(reader->line, "have ", &arg)) {
540 switch (got_oid(data, arg, &oid)) {
541 case -1: /* they have what we do not */
542 got_other = 1;
543 if (data->multi_ack
544 && ok_to_give_up(data)) {
545 const char *hex = oid_to_hex(&oid);
546 if (data->multi_ack == MULTI_ACK_DETAILED) {
547 sent_ready = 1;
548 packet_write_fmt(1, "ACK %s ready\n", hex);
549 } else
550 packet_write_fmt(1, "ACK %s continue\n", hex);
551 }
552 break;
553 default:
554 got_common = 1;
555 oid_to_hex_r(last_hex, &oid);
556 if (data->multi_ack == MULTI_ACK_DETAILED)
557 packet_write_fmt(1, "ACK %s common\n", last_hex);
558 else if (data->multi_ack)
559 packet_write_fmt(1, "ACK %s continue\n", last_hex);
560 else if (data->have_obj.nr == 1)
561 packet_write_fmt(1, "ACK %s\n", last_hex);
562 break;
563 }
564 continue;
565 }
566 if (!strcmp(reader->line, "done")) {
567 if (data->have_obj.nr > 0) {
568 if (data->multi_ack)
569 packet_write_fmt(1, "ACK %s\n", last_hex);
570 return 0;
571 }
572 packet_write_fmt(1, "NAK\n");
573 return -1;
574 }
575 die("git upload-pack: expected SHA1 list, got '%s'", reader->line);
576 }
577 }
578
579 static int is_our_ref(struct object *o, enum allow_uor allow_uor)
580 {
581 int allow_hidden_ref = (allow_uor &
582 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
583 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
584 }
585
586 /*
587 * on successful case, it's up to the caller to close cmd->out
588 */
589 static int do_reachable_revlist(struct child_process *cmd,
590 struct object_array *src,
591 struct object_array *reachable,
592 enum allow_uor allow_uor)
593 {
594 static const char *argv[] = {
595 "rev-list", "--stdin", NULL,
596 };
597 struct object *o;
598 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
599 int i;
600 const unsigned hexsz = the_hash_algo->hexsz;
601
602 cmd->argv = argv;
603 cmd->git_cmd = 1;
604 cmd->no_stderr = 1;
605 cmd->in = -1;
606 cmd->out = -1;
607
608 /*
609 * If the next rev-list --stdin encounters an unknown commit,
610 * it terminates, which will cause SIGPIPE in the write loop
611 * below.
612 */
613 sigchain_push(SIGPIPE, SIG_IGN);
614
615 if (start_command(cmd))
616 goto error;
617
618 namebuf[0] = '^';
619 namebuf[hexsz + 1] = '\n';
620 for (i = get_max_object_index(); 0 < i; ) {
621 o = get_indexed_object(--i);
622 if (!o)
623 continue;
624 if (reachable && o->type == OBJ_COMMIT)
625 o->flags &= ~TMP_MARK;
626 if (!is_our_ref(o, allow_uor))
627 continue;
628 memcpy(namebuf + 1, oid_to_hex(&o->oid), hexsz);
629 if (write_in_full(cmd->in, namebuf, hexsz + 2) < 0)
630 goto error;
631 }
632 namebuf[hexsz] = '\n';
633 for (i = 0; i < src->nr; i++) {
634 o = src->objects[i].item;
635 if (is_our_ref(o, allow_uor)) {
636 if (reachable)
637 add_object_array(o, NULL, reachable);
638 continue;
639 }
640 if (reachable && o->type == OBJ_COMMIT)
641 o->flags |= TMP_MARK;
642 memcpy(namebuf, oid_to_hex(&o->oid), hexsz);
643 if (write_in_full(cmd->in, namebuf, hexsz + 1) < 0)
644 goto error;
645 }
646 close(cmd->in);
647 cmd->in = -1;
648 sigchain_pop(SIGPIPE);
649
650 return 0;
651
652 error:
653 sigchain_pop(SIGPIPE);
654
655 if (cmd->in >= 0)
656 close(cmd->in);
657 if (cmd->out >= 0)
658 close(cmd->out);
659 return -1;
660 }
661
662 static int get_reachable_list(struct upload_pack_data *data,
663 struct object_array *reachable)
664 {
665 struct child_process cmd = CHILD_PROCESS_INIT;
666 int i;
667 struct object *o;
668 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
669 const unsigned hexsz = the_hash_algo->hexsz;
670
671 if (do_reachable_revlist(&cmd, &data->shallows, reachable,
672 data->allow_uor) < 0)
673 return -1;
674
675 while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) {
676 struct object_id oid;
677 const char *p;
678
679 if (parse_oid_hex(namebuf, &oid, &p) || *p != '\n')
680 break;
681
682 o = lookup_object(the_repository, &oid);
683 if (o && o->type == OBJ_COMMIT) {
684 o->flags &= ~TMP_MARK;
685 }
686 }
687 for (i = get_max_object_index(); 0 < i; i--) {
688 o = get_indexed_object(i - 1);
689 if (o && o->type == OBJ_COMMIT &&
690 (o->flags & TMP_MARK)) {
691 add_object_array(o, NULL, reachable);
692 o->flags &= ~TMP_MARK;
693 }
694 }
695 close(cmd.out);
696
697 if (finish_command(&cmd))
698 return -1;
699
700 return 0;
701 }
702
703 static int has_unreachable(struct object_array *src, enum allow_uor allow_uor)
704 {
705 struct child_process cmd = CHILD_PROCESS_INIT;
706 char buf[1];
707 int i;
708
709 if (do_reachable_revlist(&cmd, src, NULL, allow_uor) < 0)
710 return 1;
711
712 /*
713 * The commits out of the rev-list are not ancestors of
714 * our ref.
715 */
716 i = read_in_full(cmd.out, buf, 1);
717 if (i)
718 goto error;
719 close(cmd.out);
720 cmd.out = -1;
721
722 /*
723 * rev-list may have died by encountering a bad commit
724 * in the history, in which case we do want to bail out
725 * even when it showed no commit.
726 */
727 if (finish_command(&cmd))
728 goto error;
729
730 /* All the non-tip ones are ancestors of what we advertised */
731 return 0;
732
733 error:
734 sigchain_pop(SIGPIPE);
735 if (cmd.out >= 0)
736 close(cmd.out);
737 return 1;
738 }
739
740 static void check_non_tip(struct upload_pack_data *data)
741 {
742 int i;
743
744 /*
745 * In the normal in-process case without
746 * uploadpack.allowReachableSHA1InWant,
747 * non-tip requests can never happen.
748 */
749 if (!data->stateless_rpc && !(data->allow_uor & ALLOW_REACHABLE_SHA1))
750 goto error;
751 if (!has_unreachable(&data->want_obj, data->allow_uor))
752 /* All the non-tip ones are ancestors of what we advertised */
753 return;
754
755 error:
756 /* Pick one of them (we know there at least is one) */
757 for (i = 0; i < data->want_obj.nr; i++) {
758 struct object *o = data->want_obj.objects[i].item;
759 if (!is_our_ref(o, data->allow_uor)) {
760 packet_writer_error(&data->writer,
761 "upload-pack: not our ref %s",
762 oid_to_hex(&o->oid));
763 die("git upload-pack: not our ref %s",
764 oid_to_hex(&o->oid));
765 }
766 }
767 }
768
769 static void send_shallow(struct upload_pack_data *data,
770 struct commit_list *result)
771 {
772 while (result) {
773 struct object *object = &result->item->object;
774 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
775 packet_writer_write(&data->writer, "shallow %s",
776 oid_to_hex(&object->oid));
777 register_shallow(the_repository, &object->oid);
778 data->shallow_nr++;
779 }
780 result = result->next;
781 }
782 }
783
784 static void send_unshallow(struct upload_pack_data *data)
785 {
786 int i;
787
788 for (i = 0; i < data->shallows.nr; i++) {
789 struct object *object = data->shallows.objects[i].item;
790 if (object->flags & NOT_SHALLOW) {
791 struct commit_list *parents;
792 packet_writer_write(&data->writer, "unshallow %s",
793 oid_to_hex(&object->oid));
794 object->flags &= ~CLIENT_SHALLOW;
795 /*
796 * We want to _register_ "object" as shallow, but we
797 * also need to traverse object's parents to deepen a
798 * shallow clone. Unregister it for now so we can
799 * parse and add the parents to the want list, then
800 * re-register it.
801 */
802 unregister_shallow(&object->oid);
803 object->parsed = 0;
804 parse_commit_or_die((struct commit *)object);
805 parents = ((struct commit *)object)->parents;
806 while (parents) {
807 add_object_array(&parents->item->object,
808 NULL, &data->want_obj);
809 parents = parents->next;
810 }
811 add_object_array(object, NULL, &data->extra_edge_obj);
812 }
813 /* make sure commit traversal conforms to client */
814 register_shallow(the_repository, &object->oid);
815 }
816 }
817
818 static int check_ref(const char *refname_full, const struct object_id *oid,
819 int flag, void *cb_data);
820 static void deepen(struct upload_pack_data *data, int depth)
821 {
822 if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) {
823 int i;
824
825 for (i = 0; i < data->shallows.nr; i++) {
826 struct object *object = data->shallows.objects[i].item;
827 object->flags |= NOT_SHALLOW;
828 }
829 } else if (data->deepen_relative) {
830 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
831 struct commit_list *result;
832
833 /*
834 * Checking for reachable shallows requires that our refs be
835 * marked with OUR_REF.
836 */
837 head_ref_namespaced(check_ref, NULL);
838 for_each_namespaced_ref(check_ref, NULL);
839
840 get_reachable_list(data, &reachable_shallows);
841 result = get_shallow_commits(&reachable_shallows,
842 depth + 1,
843 SHALLOW, NOT_SHALLOW);
844 send_shallow(data, result);
845 free_commit_list(result);
846 object_array_clear(&reachable_shallows);
847 } else {
848 struct commit_list *result;
849
850 result = get_shallow_commits(&data->want_obj, depth,
851 SHALLOW, NOT_SHALLOW);
852 send_shallow(data, result);
853 free_commit_list(result);
854 }
855
856 send_unshallow(data);
857 }
858
859 static void deepen_by_rev_list(struct upload_pack_data *data,
860 int ac,
861 const char **av)
862 {
863 struct commit_list *result;
864
865 disable_commit_graph(the_repository);
866 result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
867 send_shallow(data, result);
868 free_commit_list(result);
869 send_unshallow(data);
870 }
871
872 /* Returns 1 if a shallow list is sent or 0 otherwise */
873 static int send_shallow_list(struct upload_pack_data *data)
874 {
875 int ret = 0;
876
877 if (data->depth > 0 && data->deepen_rev_list)
878 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
879 if (data->depth > 0) {
880 deepen(data, data->depth);
881 ret = 1;
882 } else if (data->deepen_rev_list) {
883 struct argv_array av = ARGV_ARRAY_INIT;
884 int i;
885
886 argv_array_push(&av, "rev-list");
887 if (data->deepen_since)
888 argv_array_pushf(&av, "--max-age=%"PRItime, data->deepen_since);
889 if (data->deepen_not.nr) {
890 argv_array_push(&av, "--not");
891 for (i = 0; i < data->deepen_not.nr; i++) {
892 struct string_list_item *s = data->deepen_not.items + i;
893 argv_array_push(&av, s->string);
894 }
895 argv_array_push(&av, "--not");
896 }
897 for (i = 0; i < data->want_obj.nr; i++) {
898 struct object *o = data->want_obj.objects[i].item;
899 argv_array_push(&av, oid_to_hex(&o->oid));
900 }
901 deepen_by_rev_list(data, av.argc, av.argv);
902 argv_array_clear(&av);
903 ret = 1;
904 } else {
905 if (data->shallows.nr > 0) {
906 int i;
907 for (i = 0; i < data->shallows.nr; i++)
908 register_shallow(the_repository,
909 &data->shallows.objects[i].item->oid);
910 }
911 }
912
913 data->shallow_nr += data->shallows.nr;
914 return ret;
915 }
916
917 static int process_shallow(const char *line, struct object_array *shallows)
918 {
919 const char *arg;
920 if (skip_prefix(line, "shallow ", &arg)) {
921 struct object_id oid;
922 struct object *object;
923 if (get_oid_hex(arg, &oid))
924 die("invalid shallow line: %s", line);
925 object = parse_object(the_repository, &oid);
926 if (!object)
927 return 1;
928 if (object->type != OBJ_COMMIT)
929 die("invalid shallow object %s", oid_to_hex(&oid));
930 if (!(object->flags & CLIENT_SHALLOW)) {
931 object->flags |= CLIENT_SHALLOW;
932 add_object_array(object, NULL, shallows);
933 }
934 return 1;
935 }
936
937 return 0;
938 }
939
940 static int process_deepen(const char *line, int *depth)
941 {
942 const char *arg;
943 if (skip_prefix(line, "deepen ", &arg)) {
944 char *end = NULL;
945 *depth = (int)strtol(arg, &end, 0);
946 if (!end || *end || *depth <= 0)
947 die("Invalid deepen: %s", line);
948 return 1;
949 }
950
951 return 0;
952 }
953
954 static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
955 {
956 const char *arg;
957 if (skip_prefix(line, "deepen-since ", &arg)) {
958 char *end = NULL;
959 *deepen_since = parse_timestamp(arg, &end, 0);
960 if (!end || *end || !deepen_since ||
961 /* revisions.c's max_age -1 is special */
962 *deepen_since == -1)
963 die("Invalid deepen-since: %s", line);
964 *deepen_rev_list = 1;
965 return 1;
966 }
967 return 0;
968 }
969
970 static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
971 {
972 const char *arg;
973 if (skip_prefix(line, "deepen-not ", &arg)) {
974 char *ref = NULL;
975 struct object_id oid;
976 if (expand_ref(the_repository, arg, strlen(arg), &oid, &ref) != 1)
977 die("git upload-pack: ambiguous deepen-not: %s", line);
978 string_list_append(deepen_not, ref);
979 free(ref);
980 *deepen_rev_list = 1;
981 return 1;
982 }
983 return 0;
984 }
985
986 static void receive_needs(struct upload_pack_data *data,
987 struct packet_reader *reader)
988 {
989 int has_non_tip = 0;
990
991 data->shallow_nr = 0;
992 for (;;) {
993 struct object *o;
994 const char *features;
995 struct object_id oid_buf;
996 const char *arg;
997
998 reset_timeout(data->timeout);
999 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
1000 break;
1001
1002 if (process_shallow(reader->line, &data->shallows))
1003 continue;
1004 if (process_deepen(reader->line, &data->depth))
1005 continue;
1006 if (process_deepen_since(reader->line, &data->deepen_since, &data->deepen_rev_list))
1007 continue;
1008 if (process_deepen_not(reader->line, &data->deepen_not, &data->deepen_rev_list))
1009 continue;
1010
1011 if (skip_prefix(reader->line, "filter ", &arg)) {
1012 if (!data->filter_capability_requested)
1013 die("git upload-pack: filtering capability not negotiated");
1014 list_objects_filter_die_if_populated(&data->filter_options);
1015 parse_list_objects_filter(&data->filter_options, arg);
1016 continue;
1017 }
1018
1019 if (!skip_prefix(reader->line, "want ", &arg) ||
1020 parse_oid_hex(arg, &oid_buf, &features))
1021 die("git upload-pack: protocol error, "
1022 "expected to get object ID, not '%s'", reader->line);
1023
1024 if (parse_feature_request(features, "deepen-relative"))
1025 data->deepen_relative = 1;
1026 if (parse_feature_request(features, "multi_ack_detailed"))
1027 data->multi_ack = MULTI_ACK_DETAILED;
1028 else if (parse_feature_request(features, "multi_ack"))
1029 data->multi_ack = MULTI_ACK;
1030 if (parse_feature_request(features, "no-done"))
1031 data->no_done = 1;
1032 if (parse_feature_request(features, "thin-pack"))
1033 data->use_thin_pack = 1;
1034 if (parse_feature_request(features, "ofs-delta"))
1035 data->use_ofs_delta = 1;
1036 if (parse_feature_request(features, "side-band-64k"))
1037 data->use_sideband = LARGE_PACKET_MAX;
1038 else if (parse_feature_request(features, "side-band"))
1039 data->use_sideband = DEFAULT_PACKET_MAX;
1040 if (parse_feature_request(features, "no-progress"))
1041 data->no_progress = 1;
1042 if (parse_feature_request(features, "include-tag"))
1043 data->use_include_tag = 1;
1044 if (data->allow_filter &&
1045 parse_feature_request(features, "filter"))
1046 data->filter_capability_requested = 1;
1047
1048 o = parse_object(the_repository, &oid_buf);
1049 if (!o) {
1050 packet_writer_error(&data->writer,
1051 "upload-pack: not our ref %s",
1052 oid_to_hex(&oid_buf));
1053 die("git upload-pack: not our ref %s",
1054 oid_to_hex(&oid_buf));
1055 }
1056 if (!(o->flags & WANTED)) {
1057 o->flags |= WANTED;
1058 if (!((data->allow_uor & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
1059 || is_our_ref(o, data->allow_uor)))
1060 has_non_tip = 1;
1061 add_object_array(o, NULL, &data->want_obj);
1062 }
1063 }
1064
1065 /*
1066 * We have sent all our refs already, and the other end
1067 * should have chosen out of them. When we are operating
1068 * in the stateless RPC mode, however, their choice may
1069 * have been based on the set of older refs advertised
1070 * by another process that handled the initial request.
1071 */
1072 if (has_non_tip)
1073 check_non_tip(data);
1074
1075 if (!data->use_sideband && data->daemon_mode)
1076 data->no_progress = 1;
1077
1078 if (data->depth == 0 && !data->deepen_rev_list && data->shallows.nr == 0)
1079 return;
1080
1081 if (send_shallow_list(data))
1082 packet_flush(1);
1083 }
1084
1085 /* return non-zero if the ref is hidden, otherwise 0 */
1086 static int mark_our_ref(const char *refname, const char *refname_full,
1087 const struct object_id *oid)
1088 {
1089 struct object *o = lookup_unknown_object(oid);
1090
1091 if (ref_is_hidden(refname, refname_full)) {
1092 o->flags |= HIDDEN_REF;
1093 return 1;
1094 }
1095 o->flags |= OUR_REF;
1096 return 0;
1097 }
1098
1099 static int check_ref(const char *refname_full, const struct object_id *oid,
1100 int flag, void *cb_data)
1101 {
1102 const char *refname = strip_namespace(refname_full);
1103
1104 mark_our_ref(refname, refname_full, oid);
1105 return 0;
1106 }
1107
1108 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
1109 {
1110 struct string_list_item *item;
1111
1112 if (!symref->nr)
1113 return;
1114 for_each_string_list_item(item, symref)
1115 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
1116 }
1117
1118 static int send_ref(const char *refname, const struct object_id *oid,
1119 int flag, void *cb_data)
1120 {
1121 static const char *capabilities = "multi_ack thin-pack side-band"
1122 " side-band-64k ofs-delta shallow deepen-since deepen-not"
1123 " deepen-relative no-progress include-tag multi_ack_detailed";
1124 const char *refname_nons = strip_namespace(refname);
1125 struct object_id peeled;
1126 struct upload_pack_data *data = cb_data;
1127
1128 if (mark_our_ref(refname_nons, refname, oid))
1129 return 0;
1130
1131 if (capabilities) {
1132 struct strbuf symref_info = STRBUF_INIT;
1133
1134 format_symref_info(&symref_info, &data->symref);
1135 packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s object-format=%s agent=%s\n",
1136 oid_to_hex(oid), refname_nons,
1137 0, capabilities,
1138 (data->allow_uor & ALLOW_TIP_SHA1) ?
1139 " allow-tip-sha1-in-want" : "",
1140 (data->allow_uor & ALLOW_REACHABLE_SHA1) ?
1141 " allow-reachable-sha1-in-want" : "",
1142 data->stateless_rpc ? " no-done" : "",
1143 symref_info.buf,
1144 data->allow_filter ? " filter" : "",
1145 the_hash_algo->name,
1146 git_user_agent_sanitized());
1147 strbuf_release(&symref_info);
1148 } else {
1149 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
1150 }
1151 capabilities = NULL;
1152 if (!peel_ref(refname, &peeled))
1153 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
1154 return 0;
1155 }
1156
1157 static int find_symref(const char *refname, const struct object_id *oid,
1158 int flag, void *cb_data)
1159 {
1160 const char *symref_target;
1161 struct string_list_item *item;
1162
1163 if ((flag & REF_ISSYMREF) == 0)
1164 return 0;
1165 symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
1166 if (!symref_target || (flag & REF_ISSYMREF) == 0)
1167 die("'%s' is a symref but it is not?", refname);
1168 item = string_list_append(cb_data, strip_namespace(refname));
1169 item->util = xstrdup(strip_namespace(symref_target));
1170 return 0;
1171 }
1172
1173 static int upload_pack_config(const char *var, const char *value, void *cb_data)
1174 {
1175 struct upload_pack_data *data = cb_data;
1176
1177 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1178 if (git_config_bool(var, value))
1179 data->allow_uor |= ALLOW_TIP_SHA1;
1180 else
1181 data->allow_uor &= ~ALLOW_TIP_SHA1;
1182 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1183 if (git_config_bool(var, value))
1184 data->allow_uor |= ALLOW_REACHABLE_SHA1;
1185 else
1186 data->allow_uor &= ~ALLOW_REACHABLE_SHA1;
1187 } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1188 if (git_config_bool(var, value))
1189 data->allow_uor |= ALLOW_ANY_SHA1;
1190 else
1191 data->allow_uor &= ~ALLOW_ANY_SHA1;
1192 } else if (!strcmp("uploadpack.keepalive", var)) {
1193 data->keepalive = git_config_int(var, value);
1194 if (!data->keepalive)
1195 data->keepalive = -1;
1196 } else if (!strcmp("uploadpack.allowfilter", var)) {
1197 data->allow_filter = git_config_bool(var, value);
1198 } else if (!strcmp("uploadpack.allowrefinwant", var)) {
1199 data->allow_ref_in_want = git_config_bool(var, value);
1200 } else if (!strcmp("uploadpack.allowsidebandall", var)) {
1201 data->allow_sideband_all = git_config_bool(var, value);
1202 } else if (!strcmp("core.precomposeunicode", var)) {
1203 precomposed_unicode = git_config_bool(var, value);
1204 }
1205
1206 if (current_config_scope() != CONFIG_SCOPE_LOCAL &&
1207 current_config_scope() != CONFIG_SCOPE_WORKTREE) {
1208 if (!strcmp("uploadpack.packobjectshook", var))
1209 return git_config_string(&data->pack_objects_hook, var, value);
1210 }
1211
1212 return parse_hide_refs_config(var, value, "uploadpack");
1213 }
1214
1215 void upload_pack(struct upload_pack_options *options)
1216 {
1217 struct packet_reader reader;
1218 struct upload_pack_data data;
1219
1220 upload_pack_data_init(&data);
1221
1222 git_config(upload_pack_config, &data);
1223
1224 data.stateless_rpc = options->stateless_rpc;
1225 data.daemon_mode = options->daemon_mode;
1226 data.timeout = options->timeout;
1227
1228 head_ref_namespaced(find_symref, &data.symref);
1229
1230 if (options->advertise_refs || !data.stateless_rpc) {
1231 reset_timeout(data.timeout);
1232 head_ref_namespaced(send_ref, &data);
1233 for_each_namespaced_ref(send_ref, &data);
1234 advertise_shallow_grafts(1);
1235 packet_flush(1);
1236 } else {
1237 head_ref_namespaced(check_ref, NULL);
1238 for_each_namespaced_ref(check_ref, NULL);
1239 }
1240
1241 if (!options->advertise_refs) {
1242 packet_reader_init(&reader, 0, NULL, 0,
1243 PACKET_READ_CHOMP_NEWLINE |
1244 PACKET_READ_DIE_ON_ERR_PACKET);
1245
1246 receive_needs(&data, &reader);
1247 if (data.want_obj.nr) {
1248 get_common_commits(&data, &reader);
1249 create_pack_file(&data, NULL);
1250 }
1251 }
1252
1253 upload_pack_data_clear(&data);
1254 }
1255
1256 static int parse_want(struct packet_writer *writer, const char *line,
1257 struct object_array *want_obj)
1258 {
1259 const char *arg;
1260 if (skip_prefix(line, "want ", &arg)) {
1261 struct object_id oid;
1262 struct object *o;
1263
1264 if (get_oid_hex(arg, &oid))
1265 die("git upload-pack: protocol error, "
1266 "expected to get oid, not '%s'", line);
1267
1268 o = parse_object(the_repository, &oid);
1269 if (!o) {
1270 packet_writer_error(writer,
1271 "upload-pack: not our ref %s",
1272 oid_to_hex(&oid));
1273 die("git upload-pack: not our ref %s",
1274 oid_to_hex(&oid));
1275 }
1276
1277 if (!(o->flags & WANTED)) {
1278 o->flags |= WANTED;
1279 add_object_array(o, NULL, want_obj);
1280 }
1281
1282 return 1;
1283 }
1284
1285 return 0;
1286 }
1287
1288 static int parse_want_ref(struct packet_writer *writer, const char *line,
1289 struct string_list *wanted_refs,
1290 struct object_array *want_obj)
1291 {
1292 const char *arg;
1293 if (skip_prefix(line, "want-ref ", &arg)) {
1294 struct object_id oid;
1295 struct string_list_item *item;
1296 struct object *o;
1297
1298 if (read_ref(arg, &oid)) {
1299 packet_writer_error(writer, "unknown ref %s", arg);
1300 die("unknown ref %s", arg);
1301 }
1302
1303 item = string_list_append(wanted_refs, arg);
1304 item->util = oiddup(&oid);
1305
1306 o = parse_object_or_die(&oid, arg);
1307 if (!(o->flags & WANTED)) {
1308 o->flags |= WANTED;
1309 add_object_array(o, NULL, want_obj);
1310 }
1311
1312 return 1;
1313 }
1314
1315 return 0;
1316 }
1317
1318 static int parse_have(const char *line, struct oid_array *haves)
1319 {
1320 const char *arg;
1321 if (skip_prefix(line, "have ", &arg)) {
1322 struct object_id oid;
1323
1324 if (get_oid_hex(arg, &oid))
1325 die("git upload-pack: expected SHA1 object, got '%s'", arg);
1326 oid_array_append(haves, &oid);
1327 return 1;
1328 }
1329
1330 return 0;
1331 }
1332
1333 static void process_args(struct packet_reader *request,
1334 struct upload_pack_data *data)
1335 {
1336 while (packet_reader_read(request) == PACKET_READ_NORMAL) {
1337 const char *arg = request->line;
1338 const char *p;
1339
1340 /* process want */
1341 if (parse_want(&data->writer, arg, &data->want_obj))
1342 continue;
1343 if (data->allow_ref_in_want &&
1344 parse_want_ref(&data->writer, arg, &data->wanted_refs,
1345 &data->want_obj))
1346 continue;
1347 /* process have line */
1348 if (parse_have(arg, &data->haves))
1349 continue;
1350
1351 /* process args like thin-pack */
1352 if (!strcmp(arg, "thin-pack")) {
1353 data->use_thin_pack = 1;
1354 continue;
1355 }
1356 if (!strcmp(arg, "ofs-delta")) {
1357 data->use_ofs_delta = 1;
1358 continue;
1359 }
1360 if (!strcmp(arg, "no-progress")) {
1361 data->no_progress = 1;
1362 continue;
1363 }
1364 if (!strcmp(arg, "include-tag")) {
1365 data->use_include_tag = 1;
1366 continue;
1367 }
1368 if (!strcmp(arg, "done")) {
1369 data->done = 1;
1370 continue;
1371 }
1372
1373 /* Shallow related arguments */
1374 if (process_shallow(arg, &data->shallows))
1375 continue;
1376 if (process_deepen(arg, &data->depth))
1377 continue;
1378 if (process_deepen_since(arg, &data->deepen_since,
1379 &data->deepen_rev_list))
1380 continue;
1381 if (process_deepen_not(arg, &data->deepen_not,
1382 &data->deepen_rev_list))
1383 continue;
1384 if (!strcmp(arg, "deepen-relative")) {
1385 data->deepen_relative = 1;
1386 continue;
1387 }
1388
1389 if (data->allow_filter && skip_prefix(arg, "filter ", &p)) {
1390 list_objects_filter_die_if_populated(&data->filter_options);
1391 parse_list_objects_filter(&data->filter_options, p);
1392 continue;
1393 }
1394
1395 if ((git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1396 data->allow_sideband_all) &&
1397 !strcmp(arg, "sideband-all")) {
1398 data->writer.use_sideband = 1;
1399 continue;
1400 }
1401
1402 if (skip_prefix(arg, "packfile-uris ", &p)) {
1403 string_list_split(&data->uri_protocols, p, ',', -1);
1404 continue;
1405 }
1406
1407 /* ignore unknown lines maybe? */
1408 die("unexpected line: '%s'", arg);
1409 }
1410
1411 if (data->uri_protocols.nr && !data->writer.use_sideband)
1412 string_list_clear(&data->uri_protocols, 0);
1413
1414 if (request->status != PACKET_READ_FLUSH)
1415 die(_("expected flush after fetch arguments"));
1416 }
1417
1418 static int process_haves(struct upload_pack_data *data, struct oid_array *common)
1419 {
1420 int i;
1421
1422 /* Process haves */
1423 for (i = 0; i < data->haves.nr; i++) {
1424 const struct object_id *oid = &data->haves.oid[i];
1425
1426 if (!has_object_file(oid))
1427 continue;
1428
1429 oid_array_append(common, oid);
1430
1431 do_got_oid(data, oid);
1432 }
1433
1434 return 0;
1435 }
1436
1437 static int send_acks(struct upload_pack_data *data, struct oid_array *acks)
1438 {
1439 int i;
1440
1441 packet_writer_write(&data->writer, "acknowledgments\n");
1442
1443 /* Send Acks */
1444 if (!acks->nr)
1445 packet_writer_write(&data->writer, "NAK\n");
1446
1447 for (i = 0; i < acks->nr; i++) {
1448 packet_writer_write(&data->writer, "ACK %s\n",
1449 oid_to_hex(&acks->oid[i]));
1450 }
1451
1452 if (ok_to_give_up(data)) {
1453 /* Send Ready */
1454 packet_writer_write(&data->writer, "ready\n");
1455 return 1;
1456 }
1457
1458 return 0;
1459 }
1460
1461 static int process_haves_and_send_acks(struct upload_pack_data *data)
1462 {
1463 struct oid_array common = OID_ARRAY_INIT;
1464 int ret = 0;
1465
1466 process_haves(data, &common);
1467 if (data->done) {
1468 ret = 1;
1469 } else if (send_acks(data, &common)) {
1470 packet_writer_delim(&data->writer);
1471 ret = 1;
1472 } else {
1473 /* Add Flush */
1474 packet_writer_flush(&data->writer);
1475 ret = 0;
1476 }
1477
1478 oid_array_clear(&data->haves);
1479 oid_array_clear(&common);
1480 return ret;
1481 }
1482
1483 static void send_wanted_ref_info(struct upload_pack_data *data)
1484 {
1485 const struct string_list_item *item;
1486
1487 if (!data->wanted_refs.nr)
1488 return;
1489
1490 packet_writer_write(&data->writer, "wanted-refs\n");
1491
1492 for_each_string_list_item(item, &data->wanted_refs) {
1493 packet_writer_write(&data->writer, "%s %s\n",
1494 oid_to_hex(item->util),
1495 item->string);
1496 }
1497
1498 packet_writer_delim(&data->writer);
1499 }
1500
1501 static void send_shallow_info(struct upload_pack_data *data)
1502 {
1503 /* No shallow info needs to be sent */
1504 if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1505 !is_repository_shallow(the_repository))
1506 return;
1507
1508 packet_writer_write(&data->writer, "shallow-info\n");
1509
1510 if (!send_shallow_list(data) &&
1511 is_repository_shallow(the_repository))
1512 deepen(data, INFINITE_DEPTH);
1513
1514 packet_delim(1);
1515 }
1516
1517 enum fetch_state {
1518 FETCH_PROCESS_ARGS = 0,
1519 FETCH_SEND_ACKS,
1520 FETCH_SEND_PACK,
1521 FETCH_DONE,
1522 };
1523
1524 int upload_pack_v2(struct repository *r, struct argv_array *keys,
1525 struct packet_reader *request)
1526 {
1527 enum fetch_state state = FETCH_PROCESS_ARGS;
1528 struct upload_pack_data data;
1529
1530 clear_object_flags(ALL_FLAGS);
1531
1532 upload_pack_data_init(&data);
1533 data.use_sideband = LARGE_PACKET_MAX;
1534
1535 git_config(upload_pack_config, &data);
1536
1537 while (state != FETCH_DONE) {
1538 switch (state) {
1539 case FETCH_PROCESS_ARGS:
1540 process_args(request, &data);
1541
1542 if (!data.want_obj.nr) {
1543 /*
1544 * Request didn't contain any 'want' lines,
1545 * guess they didn't want anything.
1546 */
1547 state = FETCH_DONE;
1548 } else if (data.haves.nr) {
1549 /*
1550 * Request had 'have' lines, so lets ACK them.
1551 */
1552 state = FETCH_SEND_ACKS;
1553 } else {
1554 /*
1555 * Request had 'want's but no 'have's so we can
1556 * immedietly go to construct and send a pack.
1557 */
1558 state = FETCH_SEND_PACK;
1559 }
1560 break;
1561 case FETCH_SEND_ACKS:
1562 if (process_haves_and_send_acks(&data))
1563 state = FETCH_SEND_PACK;
1564 else
1565 state = FETCH_DONE;
1566 break;
1567 case FETCH_SEND_PACK:
1568 send_wanted_ref_info(&data);
1569 send_shallow_info(&data);
1570
1571 if (data.uri_protocols.nr) {
1572 create_pack_file(&data, &data.uri_protocols);
1573 } else {
1574 packet_writer_write(&data.writer, "packfile\n");
1575 create_pack_file(&data, NULL);
1576 }
1577 state = FETCH_DONE;
1578 break;
1579 case FETCH_DONE:
1580 continue;
1581 }
1582 }
1583
1584 upload_pack_data_clear(&data);
1585 return 0;
1586 }
1587
1588 int upload_pack_advertise(struct repository *r,
1589 struct strbuf *value)
1590 {
1591 if (value) {
1592 int allow_filter_value;
1593 int allow_ref_in_want;
1594 int allow_sideband_all_value;
1595 char *str = NULL;
1596
1597 strbuf_addstr(value, "shallow");
1598
1599 if (!repo_config_get_bool(the_repository,
1600 "uploadpack.allowfilter",
1601 &allow_filter_value) &&
1602 allow_filter_value)
1603 strbuf_addstr(value, " filter");
1604
1605 if (!repo_config_get_bool(the_repository,
1606 "uploadpack.allowrefinwant",
1607 &allow_ref_in_want) &&
1608 allow_ref_in_want)
1609 strbuf_addstr(value, " ref-in-want");
1610
1611 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1612 (!repo_config_get_bool(the_repository,
1613 "uploadpack.allowsidebandall",
1614 &allow_sideband_all_value) &&
1615 allow_sideband_all_value))
1616 strbuf_addstr(value, " sideband-all");
1617
1618 if (!repo_config_get_string(the_repository,
1619 "uploadpack.blobpackfileuri",
1620 &str) &&
1621 str) {
1622 strbuf_addstr(value, " packfile-uris");
1623 free(str);
1624 }
1625 }
1626
1627 return 1;
1628 }
Unnamed repository; edit this file 'description' to name the repository.