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index-pack: drop type_cas mutex
[git/debian.git] / upload-pack.c
blob46a5cac0a97c6cce9cd6c0466347754c38a6fa4a
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 "strvec.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 struct string_list allowed_filters;
92
93 struct packet_writer writer;
94
95 const char *pack_objects_hook;
96
97 unsigned stateless_rpc : 1; /* v0 only */
98 unsigned no_done : 1; /* v0 only */
99 unsigned daemon_mode : 1; /* v0 only */
100 unsigned filter_capability_requested : 1; /* v0 only */
101
102 unsigned use_thin_pack : 1;
103 unsigned use_ofs_delta : 1;
104 unsigned no_progress : 1;
105 unsigned use_include_tag : 1;
106 unsigned allow_filter : 1;
107 unsigned allow_filter_fallback : 1;
108 unsigned long tree_filter_max_depth;
109
110 unsigned done : 1; /* v2 only */
111 unsigned allow_ref_in_want : 1; /* v2 only */
112 unsigned allow_sideband_all : 1; /* v2 only */
113 };
114
115 static void upload_pack_data_init(struct upload_pack_data *data)
116 {
117 struct string_list symref = STRING_LIST_INIT_DUP;
118 struct string_list wanted_refs = STRING_LIST_INIT_DUP;
119 struct object_array want_obj = OBJECT_ARRAY_INIT;
120 struct object_array have_obj = OBJECT_ARRAY_INIT;
121 struct oid_array haves = OID_ARRAY_INIT;
122 struct object_array shallows = OBJECT_ARRAY_INIT;
123 struct string_list deepen_not = STRING_LIST_INIT_DUP;
124 struct string_list uri_protocols = STRING_LIST_INIT_DUP;
125 struct object_array extra_edge_obj = OBJECT_ARRAY_INIT;
126 struct string_list allowed_filters = STRING_LIST_INIT_DUP;
127
128 memset(data, 0, sizeof(*data));
129 data->symref = symref;
130 data->wanted_refs = wanted_refs;
131 data->want_obj = want_obj;
132 data->have_obj = have_obj;
133 data->haves = haves;
134 data->shallows = shallows;
135 data->deepen_not = deepen_not;
136 data->uri_protocols = uri_protocols;
137 data->extra_edge_obj = extra_edge_obj;
138 data->allowed_filters = allowed_filters;
139 data->allow_filter_fallback = 1;
140 data->tree_filter_max_depth = ULONG_MAX;
141 packet_writer_init(&data->writer, 1);
142
143 data->keepalive = 5;
144 }
145
146 static void upload_pack_data_clear(struct upload_pack_data *data)
147 {
148 string_list_clear(&data->symref, 1);
149 string_list_clear(&data->wanted_refs, 1);
150 object_array_clear(&data->want_obj);
151 object_array_clear(&data->have_obj);
152 oid_array_clear(&data->haves);
153 object_array_clear(&data->shallows);
154 string_list_clear(&data->deepen_not, 0);
155 object_array_clear(&data->extra_edge_obj);
156 list_objects_filter_release(&data->filter_options);
157 string_list_clear(&data->allowed_filters, 1);
158
159 free((char *)data->pack_objects_hook);
160 }
161
162 static void reset_timeout(unsigned int timeout)
163 {
164 alarm(timeout);
165 }
166
167 static void send_client_data(int fd, const char *data, ssize_t sz,
168 int use_sideband)
169 {
170 if (use_sideband) {
171 send_sideband(1, fd, data, sz, use_sideband);
172 return;
173 }
174 if (fd == 3)
175 /* emergency quit */
176 fd = 2;
177 if (fd == 2) {
178 /* XXX: are we happy to lose stuff here? */
179 xwrite(fd, data, sz);
180 return;
181 }
182 write_or_die(fd, data, sz);
183 }
184
185 static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
186 {
187 FILE *fp = cb_data;
188 if (graft->nr_parent == -1)
189 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
190 return 0;
191 }
192
193 struct output_state {
194 char buffer[8193];
195 int used;
196 unsigned packfile_uris_started : 1;
197 unsigned packfile_started : 1;
198 };
199
200 static int relay_pack_data(int pack_objects_out, struct output_state *os,
201 int use_sideband, int write_packfile_line)
202 {
203 /*
204 * We keep the last byte to ourselves
205 * in case we detect broken rev-list, so that we
206 * can leave the stream corrupted. This is
207 * unfortunate -- unpack-objects would happily
208 * accept a valid packdata with trailing garbage,
209 * so appending garbage after we pass all the
210 * pack data is not good enough to signal
211 * breakage to downstream.
212 */
213 ssize_t readsz;
214
215 readsz = xread(pack_objects_out, os->buffer + os->used,
216 sizeof(os->buffer) - os->used);
217 if (readsz < 0) {
218 return readsz;
219 }
220 os->used += readsz;
221
222 while (!os->packfile_started) {
223 char *p;
224 if (os->used >= 4 && !memcmp(os->buffer, "PACK", 4)) {
225 os->packfile_started = 1;
226 if (write_packfile_line) {
227 if (os->packfile_uris_started)
228 packet_delim(1);
229 packet_write_fmt(1, "\1packfile\n");
230 }
231 break;
232 }
233 if ((p = memchr(os->buffer, '\n', os->used))) {
234 if (!os->packfile_uris_started) {
235 os->packfile_uris_started = 1;
236 if (!write_packfile_line)
237 BUG("packfile_uris requires sideband-all");
238 packet_write_fmt(1, "\1packfile-uris\n");
239 }
240 *p = '\0';
241 packet_write_fmt(1, "\1%s\n", os->buffer);
242
243 os->used -= p - os->buffer + 1;
244 memmove(os->buffer, p + 1, os->used);
245 } else {
246 /*
247 * Incomplete line.
248 */
249 return readsz;
250 }
251 }
252
253 if (os->used > 1) {
254 send_client_data(1, os->buffer, os->used - 1, use_sideband);
255 os->buffer[0] = os->buffer[os->used - 1];
256 os->used = 1;
257 } else {
258 send_client_data(1, os->buffer, os->used, use_sideband);
259 os->used = 0;
260 }
261
262 return readsz;
263 }
264
265 static void create_pack_file(struct upload_pack_data *pack_data,
266 const struct string_list *uri_protocols)
267 {
268 struct child_process pack_objects = CHILD_PROCESS_INIT;
269 struct output_state output_state = { { 0 } };
270 char progress[128];
271 char abort_msg[] = "aborting due to possible repository "
272 "corruption on the remote side.";
273 ssize_t sz;
274 int i;
275 FILE *pipe_fd;
276
277 if (!pack_data->pack_objects_hook)
278 pack_objects.git_cmd = 1;
279 else {
280 strvec_push(&pack_objects.args, pack_data->pack_objects_hook);
281 strvec_push(&pack_objects.args, "git");
282 pack_objects.use_shell = 1;
283 }
284
285 if (pack_data->shallow_nr) {
286 strvec_push(&pack_objects.args, "--shallow-file");
287 strvec_push(&pack_objects.args, "");
288 }
289 strvec_push(&pack_objects.args, "pack-objects");
290 strvec_push(&pack_objects.args, "--revs");
291 if (pack_data->use_thin_pack)
292 strvec_push(&pack_objects.args, "--thin");
293
294 strvec_push(&pack_objects.args, "--stdout");
295 if (pack_data->shallow_nr)
296 strvec_push(&pack_objects.args, "--shallow");
297 if (!pack_data->no_progress)
298 strvec_push(&pack_objects.args, "--progress");
299 if (pack_data->use_ofs_delta)
300 strvec_push(&pack_objects.args, "--delta-base-offset");
301 if (pack_data->use_include_tag)
302 strvec_push(&pack_objects.args, "--include-tag");
303 if (pack_data->filter_options.choice) {
304 const char *spec =
305 expand_list_objects_filter_spec(&pack_data->filter_options);
306 if (pack_objects.use_shell) {
307 struct strbuf buf = STRBUF_INIT;
308 sq_quote_buf(&buf, spec);
309 strvec_pushf(&pack_objects.args, "--filter=%s", buf.buf);
310 strbuf_release(&buf);
311 } else {
312 strvec_pushf(&pack_objects.args, "--filter=%s", spec);
313 }
314 }
315 if (uri_protocols) {
316 for (i = 0; i < uri_protocols->nr; i++)
317 strvec_pushf(&pack_objects.args, "--uri-protocol=%s",
318 uri_protocols->items[i].string);
319 }
320
321 pack_objects.in = -1;
322 pack_objects.out = -1;
323 pack_objects.err = -1;
324
325 if (start_command(&pack_objects))
326 die("git upload-pack: unable to fork git-pack-objects");
327
328 pipe_fd = xfdopen(pack_objects.in, "w");
329
330 if (pack_data->shallow_nr)
331 for_each_commit_graft(write_one_shallow, pipe_fd);
332
333 for (i = 0; i < pack_data->want_obj.nr; i++)
334 fprintf(pipe_fd, "%s\n",
335 oid_to_hex(&pack_data->want_obj.objects[i].item->oid));
336 fprintf(pipe_fd, "--not\n");
337 for (i = 0; i < pack_data->have_obj.nr; i++)
338 fprintf(pipe_fd, "%s\n",
339 oid_to_hex(&pack_data->have_obj.objects[i].item->oid));
340 for (i = 0; i < pack_data->extra_edge_obj.nr; i++)
341 fprintf(pipe_fd, "%s\n",
342 oid_to_hex(&pack_data->extra_edge_obj.objects[i].item->oid));
343 fprintf(pipe_fd, "\n");
344 fflush(pipe_fd);
345 fclose(pipe_fd);
346
347 /* We read from pack_objects.err to capture stderr output for
348 * progress bar, and pack_objects.out to capture the pack data.
349 */
350
351 while (1) {
352 struct pollfd pfd[2];
353 int pe, pu, pollsize, polltimeout;
354 int ret;
355
356 reset_timeout(pack_data->timeout);
357
358 pollsize = 0;
359 pe = pu = -1;
360
361 if (0 <= pack_objects.out) {
362 pfd[pollsize].fd = pack_objects.out;
363 pfd[pollsize].events = POLLIN;
364 pu = pollsize;
365 pollsize++;
366 }
367 if (0 <= pack_objects.err) {
368 pfd[pollsize].fd = pack_objects.err;
369 pfd[pollsize].events = POLLIN;
370 pe = pollsize;
371 pollsize++;
372 }
373
374 if (!pollsize)
375 break;
376
377 polltimeout = pack_data->keepalive < 0
378 ? -1
379 : 1000 * pack_data->keepalive;
380
381 ret = poll(pfd, pollsize, polltimeout);
382
383 if (ret < 0) {
384 if (errno != EINTR) {
385 error_errno("poll failed, resuming");
386 sleep(1);
387 }
388 continue;
389 }
390 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
391 /* Status ready; we ship that in the side-band
392 * or dump to the standard error.
393 */
394 sz = xread(pack_objects.err, progress,
395 sizeof(progress));
396 if (0 < sz)
397 send_client_data(2, progress, sz,
398 pack_data->use_sideband);
399 else if (sz == 0) {
400 close(pack_objects.err);
401 pack_objects.err = -1;
402 }
403 else
404 goto fail;
405 /* give priority to status messages */
406 continue;
407 }
408 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
409 int result = relay_pack_data(pack_objects.out,
410 &output_state,
411 pack_data->use_sideband,
412 !!uri_protocols);
413
414 if (result == 0) {
415 close(pack_objects.out);
416 pack_objects.out = -1;
417 } else if (result < 0) {
418 goto fail;
419 }
420 }
421
422 /*
423 * We hit the keepalive timeout without saying anything; send
424 * an empty message on the data sideband just to let the other
425 * side know we're still working on it, but don't have any data
426 * yet.
427 *
428 * If we don't have a sideband channel, there's no room in the
429 * protocol to say anything, so those clients are just out of
430 * luck.
431 */
432 if (!ret && pack_data->use_sideband) {
433 static const char buf[] = "0005\1";
434 write_or_die(1, buf, 5);
435 }
436 }
437
438 if (finish_command(&pack_objects)) {
439 error("git upload-pack: git-pack-objects died with error.");
440 goto fail;
441 }
442
443 /* flush the data */
444 if (output_state.used > 0) {
445 send_client_data(1, output_state.buffer, output_state.used,
446 pack_data->use_sideband);
447 fprintf(stderr, "flushed.\n");
448 }
449 if (pack_data->use_sideband)
450 packet_flush(1);
451 return;
452
453 fail:
454 send_client_data(3, abort_msg, sizeof(abort_msg),
455 pack_data->use_sideband);
456 die("git upload-pack: %s", abort_msg);
457 }
458
459 static int do_got_oid(struct upload_pack_data *data, const struct object_id *oid)
460 {
461 int we_knew_they_have = 0;
462 struct object *o = parse_object(the_repository, oid);
463
464 if (!o)
465 die("oops (%s)", oid_to_hex(oid));
466 if (o->type == OBJ_COMMIT) {
467 struct commit_list *parents;
468 struct commit *commit = (struct commit *)o;
469 if (o->flags & THEY_HAVE)
470 we_knew_they_have = 1;
471 else
472 o->flags |= THEY_HAVE;
473 if (!data->oldest_have || (commit->date < data->oldest_have))
474 data->oldest_have = commit->date;
475 for (parents = commit->parents;
476 parents;
477 parents = parents->next)
478 parents->item->object.flags |= THEY_HAVE;
479 }
480 if (!we_knew_they_have) {
481 add_object_array(o, NULL, &data->have_obj);
482 return 1;
483 }
484 return 0;
485 }
486
487 static int got_oid(struct upload_pack_data *data,
488 const char *hex, struct object_id *oid)
489 {
490 if (get_oid_hex(hex, oid))
491 die("git upload-pack: expected SHA1 object, got '%s'", hex);
492 if (!has_object_file_with_flags(oid,
493 OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT))
494 return -1;
495 return do_got_oid(data, oid);
496 }
497
498 static int ok_to_give_up(struct upload_pack_data *data)
499 {
500 uint32_t min_generation = GENERATION_NUMBER_ZERO;
501
502 if (!data->have_obj.nr)
503 return 0;
504
505 return can_all_from_reach_with_flag(&data->want_obj, THEY_HAVE,
506 COMMON_KNOWN, data->oldest_have,
507 min_generation);
508 }
509
510 static int get_common_commits(struct upload_pack_data *data,
511 struct packet_reader *reader)
512 {
513 struct object_id oid;
514 char last_hex[GIT_MAX_HEXSZ + 1];
515 int got_common = 0;
516 int got_other = 0;
517 int sent_ready = 0;
518
519 save_commit_buffer = 0;
520
521 for (;;) {
522 const char *arg;
523
524 reset_timeout(data->timeout);
525
526 if (packet_reader_read(reader) != PACKET_READ_NORMAL) {
527 if (data->multi_ack == MULTI_ACK_DETAILED
528 && got_common
529 && !got_other
530 && ok_to_give_up(data)) {
531 sent_ready = 1;
532 packet_write_fmt(1, "ACK %s ready\n", last_hex);
533 }
534 if (data->have_obj.nr == 0 || data->multi_ack)
535 packet_write_fmt(1, "NAK\n");
536
537 if (data->no_done && sent_ready) {
538 packet_write_fmt(1, "ACK %s\n", last_hex);
539 return 0;
540 }
541 if (data->stateless_rpc)
542 exit(0);
543 got_common = 0;
544 got_other = 0;
545 continue;
546 }
547 if (skip_prefix(reader->line, "have ", &arg)) {
548 switch (got_oid(data, arg, &oid)) {
549 case -1: /* they have what we do not */
550 got_other = 1;
551 if (data->multi_ack
552 && ok_to_give_up(data)) {
553 const char *hex = oid_to_hex(&oid);
554 if (data->multi_ack == MULTI_ACK_DETAILED) {
555 sent_ready = 1;
556 packet_write_fmt(1, "ACK %s ready\n", hex);
557 } else
558 packet_write_fmt(1, "ACK %s continue\n", hex);
559 }
560 break;
561 default:
562 got_common = 1;
563 oid_to_hex_r(last_hex, &oid);
564 if (data->multi_ack == MULTI_ACK_DETAILED)
565 packet_write_fmt(1, "ACK %s common\n", last_hex);
566 else if (data->multi_ack)
567 packet_write_fmt(1, "ACK %s continue\n", last_hex);
568 else if (data->have_obj.nr == 1)
569 packet_write_fmt(1, "ACK %s\n", last_hex);
570 break;
571 }
572 continue;
573 }
574 if (!strcmp(reader->line, "done")) {
575 if (data->have_obj.nr > 0) {
576 if (data->multi_ack)
577 packet_write_fmt(1, "ACK %s\n", last_hex);
578 return 0;
579 }
580 packet_write_fmt(1, "NAK\n");
581 return -1;
582 }
583 die("git upload-pack: expected SHA1 list, got '%s'", reader->line);
584 }
585 }
586
587 static int is_our_ref(struct object *o, enum allow_uor allow_uor)
588 {
589 int allow_hidden_ref = (allow_uor &
590 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
591 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
592 }
593
594 /*
595 * on successful case, it's up to the caller to close cmd->out
596 */
597 static int do_reachable_revlist(struct child_process *cmd,
598 struct object_array *src,
599 struct object_array *reachable,
600 enum allow_uor allow_uor)
601 {
602 static const char *argv[] = {
603 "rev-list", "--stdin", NULL,
604 };
605 struct object *o;
606 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
607 int i;
608 const unsigned hexsz = the_hash_algo->hexsz;
609
610 cmd->argv = argv;
611 cmd->git_cmd = 1;
612 cmd->no_stderr = 1;
613 cmd->in = -1;
614 cmd->out = -1;
615
616 /*
617 * If the next rev-list --stdin encounters an unknown commit,
618 * it terminates, which will cause SIGPIPE in the write loop
619 * below.
620 */
621 sigchain_push(SIGPIPE, SIG_IGN);
622
623 if (start_command(cmd))
624 goto error;
625
626 namebuf[0] = '^';
627 namebuf[hexsz + 1] = '\n';
628 for (i = get_max_object_index(); 0 < i; ) {
629 o = get_indexed_object(--i);
630 if (!o)
631 continue;
632 if (reachable && o->type == OBJ_COMMIT)
633 o->flags &= ~TMP_MARK;
634 if (!is_our_ref(o, allow_uor))
635 continue;
636 memcpy(namebuf + 1, oid_to_hex(&o->oid), hexsz);
637 if (write_in_full(cmd->in, namebuf, hexsz + 2) < 0)
638 goto error;
639 }
640 namebuf[hexsz] = '\n';
641 for (i = 0; i < src->nr; i++) {
642 o = src->objects[i].item;
643 if (is_our_ref(o, allow_uor)) {
644 if (reachable)
645 add_object_array(o, NULL, reachable);
646 continue;
647 }
648 if (reachable && o->type == OBJ_COMMIT)
649 o->flags |= TMP_MARK;
650 memcpy(namebuf, oid_to_hex(&o->oid), hexsz);
651 if (write_in_full(cmd->in, namebuf, hexsz + 1) < 0)
652 goto error;
653 }
654 close(cmd->in);
655 cmd->in = -1;
656 sigchain_pop(SIGPIPE);
657
658 return 0;
659
660 error:
661 sigchain_pop(SIGPIPE);
662
663 if (cmd->in >= 0)
664 close(cmd->in);
665 if (cmd->out >= 0)
666 close(cmd->out);
667 return -1;
668 }
669
670 static int get_reachable_list(struct upload_pack_data *data,
671 struct object_array *reachable)
672 {
673 struct child_process cmd = CHILD_PROCESS_INIT;
674 int i;
675 struct object *o;
676 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
677 const unsigned hexsz = the_hash_algo->hexsz;
678
679 if (do_reachable_revlist(&cmd, &data->shallows, reachable,
680 data->allow_uor) < 0)
681 return -1;
682
683 while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) {
684 struct object_id oid;
685 const char *p;
686
687 if (parse_oid_hex(namebuf, &oid, &p) || *p != '\n')
688 break;
689
690 o = lookup_object(the_repository, &oid);
691 if (o && o->type == OBJ_COMMIT) {
692 o->flags &= ~TMP_MARK;
693 }
694 }
695 for (i = get_max_object_index(); 0 < i; i--) {
696 o = get_indexed_object(i - 1);
697 if (o && o->type == OBJ_COMMIT &&
698 (o->flags & TMP_MARK)) {
699 add_object_array(o, NULL, reachable);
700 o->flags &= ~TMP_MARK;
701 }
702 }
703 close(cmd.out);
704
705 if (finish_command(&cmd))
706 return -1;
707
708 return 0;
709 }
710
711 static int has_unreachable(struct object_array *src, enum allow_uor allow_uor)
712 {
713 struct child_process cmd = CHILD_PROCESS_INIT;
714 char buf[1];
715 int i;
716
717 if (do_reachable_revlist(&cmd, src, NULL, allow_uor) < 0)
718 return 1;
719
720 /*
721 * The commits out of the rev-list are not ancestors of
722 * our ref.
723 */
724 i = read_in_full(cmd.out, buf, 1);
725 if (i)
726 goto error;
727 close(cmd.out);
728 cmd.out = -1;
729
730 /*
731 * rev-list may have died by encountering a bad commit
732 * in the history, in which case we do want to bail out
733 * even when it showed no commit.
734 */
735 if (finish_command(&cmd))
736 goto error;
737
738 /* All the non-tip ones are ancestors of what we advertised */
739 return 0;
740
741 error:
742 if (cmd.out >= 0)
743 close(cmd.out);
744 return 1;
745 }
746
747 static void check_non_tip(struct upload_pack_data *data)
748 {
749 int i;
750
751 /*
752 * In the normal in-process case without
753 * uploadpack.allowReachableSHA1InWant,
754 * non-tip requests can never happen.
755 */
756 if (!data->stateless_rpc && !(data->allow_uor & ALLOW_REACHABLE_SHA1))
757 goto error;
758 if (!has_unreachable(&data->want_obj, data->allow_uor))
759 /* All the non-tip ones are ancestors of what we advertised */
760 return;
761
762 error:
763 /* Pick one of them (we know there at least is one) */
764 for (i = 0; i < data->want_obj.nr; i++) {
765 struct object *o = data->want_obj.objects[i].item;
766 if (!is_our_ref(o, data->allow_uor)) {
767 packet_writer_error(&data->writer,
768 "upload-pack: not our ref %s",
769 oid_to_hex(&o->oid));
770 die("git upload-pack: not our ref %s",
771 oid_to_hex(&o->oid));
772 }
773 }
774 }
775
776 static void send_shallow(struct upload_pack_data *data,
777 struct commit_list *result)
778 {
779 while (result) {
780 struct object *object = &result->item->object;
781 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
782 packet_writer_write(&data->writer, "shallow %s",
783 oid_to_hex(&object->oid));
784 register_shallow(the_repository, &object->oid);
785 data->shallow_nr++;
786 }
787 result = result->next;
788 }
789 }
790
791 static void send_unshallow(struct upload_pack_data *data)
792 {
793 int i;
794
795 for (i = 0; i < data->shallows.nr; i++) {
796 struct object *object = data->shallows.objects[i].item;
797 if (object->flags & NOT_SHALLOW) {
798 struct commit_list *parents;
799 packet_writer_write(&data->writer, "unshallow %s",
800 oid_to_hex(&object->oid));
801 object->flags &= ~CLIENT_SHALLOW;
802 /*
803 * We want to _register_ "object" as shallow, but we
804 * also need to traverse object's parents to deepen a
805 * shallow clone. Unregister it for now so we can
806 * parse and add the parents to the want list, then
807 * re-register it.
808 */
809 unregister_shallow(&object->oid);
810 object->parsed = 0;
811 parse_commit_or_die((struct commit *)object);
812 parents = ((struct commit *)object)->parents;
813 while (parents) {
814 add_object_array(&parents->item->object,
815 NULL, &data->want_obj);
816 parents = parents->next;
817 }
818 add_object_array(object, NULL, &data->extra_edge_obj);
819 }
820 /* make sure commit traversal conforms to client */
821 register_shallow(the_repository, &object->oid);
822 }
823 }
824
825 static int check_ref(const char *refname_full, const struct object_id *oid,
826 int flag, void *cb_data);
827 static void deepen(struct upload_pack_data *data, int depth)
828 {
829 if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) {
830 int i;
831
832 for (i = 0; i < data->shallows.nr; i++) {
833 struct object *object = data->shallows.objects[i].item;
834 object->flags |= NOT_SHALLOW;
835 }
836 } else if (data->deepen_relative) {
837 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
838 struct commit_list *result;
839
840 /*
841 * Checking for reachable shallows requires that our refs be
842 * marked with OUR_REF.
843 */
844 head_ref_namespaced(check_ref, NULL);
845 for_each_namespaced_ref(check_ref, NULL);
846
847 get_reachable_list(data, &reachable_shallows);
848 result = get_shallow_commits(&reachable_shallows,
849 depth + 1,
850 SHALLOW, NOT_SHALLOW);
851 send_shallow(data, result);
852 free_commit_list(result);
853 object_array_clear(&reachable_shallows);
854 } else {
855 struct commit_list *result;
856
857 result = get_shallow_commits(&data->want_obj, depth,
858 SHALLOW, NOT_SHALLOW);
859 send_shallow(data, result);
860 free_commit_list(result);
861 }
862
863 send_unshallow(data);
864 }
865
866 static void deepen_by_rev_list(struct upload_pack_data *data,
867 int ac,
868 const char **av)
869 {
870 struct commit_list *result;
871
872 disable_commit_graph(the_repository);
873 result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
874 send_shallow(data, result);
875 free_commit_list(result);
876 send_unshallow(data);
877 }
878
879 /* Returns 1 if a shallow list is sent or 0 otherwise */
880 static int send_shallow_list(struct upload_pack_data *data)
881 {
882 int ret = 0;
883
884 if (data->depth > 0 && data->deepen_rev_list)
885 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
886 if (data->depth > 0) {
887 deepen(data, data->depth);
888 ret = 1;
889 } else if (data->deepen_rev_list) {
890 struct strvec av = STRVEC_INIT;
891 int i;
892
893 strvec_push(&av, "rev-list");
894 if (data->deepen_since)
895 strvec_pushf(&av, "--max-age=%"PRItime, data->deepen_since);
896 if (data->deepen_not.nr) {
897 strvec_push(&av, "--not");
898 for (i = 0; i < data->deepen_not.nr; i++) {
899 struct string_list_item *s = data->deepen_not.items + i;
900 strvec_push(&av, s->string);
901 }
902 strvec_push(&av, "--not");
903 }
904 for (i = 0; i < data->want_obj.nr; i++) {
905 struct object *o = data->want_obj.objects[i].item;
906 strvec_push(&av, oid_to_hex(&o->oid));
907 }
908 deepen_by_rev_list(data, av.nr, av.v);
909 strvec_clear(&av);
910 ret = 1;
911 } else {
912 if (data->shallows.nr > 0) {
913 int i;
914 for (i = 0; i < data->shallows.nr; i++)
915 register_shallow(the_repository,
916 &data->shallows.objects[i].item->oid);
917 }
918 }
919
920 data->shallow_nr += data->shallows.nr;
921 return ret;
922 }
923
924 static int process_shallow(const char *line, struct object_array *shallows)
925 {
926 const char *arg;
927 if (skip_prefix(line, "shallow ", &arg)) {
928 struct object_id oid;
929 struct object *object;
930 if (get_oid_hex(arg, &oid))
931 die("invalid shallow line: %s", line);
932 object = parse_object(the_repository, &oid);
933 if (!object)
934 return 1;
935 if (object->type != OBJ_COMMIT)
936 die("invalid shallow object %s", oid_to_hex(&oid));
937 if (!(object->flags & CLIENT_SHALLOW)) {
938 object->flags |= CLIENT_SHALLOW;
939 add_object_array(object, NULL, shallows);
940 }
941 return 1;
942 }
943
944 return 0;
945 }
946
947 static int process_deepen(const char *line, int *depth)
948 {
949 const char *arg;
950 if (skip_prefix(line, "deepen ", &arg)) {
951 char *end = NULL;
952 *depth = (int)strtol(arg, &end, 0);
953 if (!end || *end || *depth <= 0)
954 die("Invalid deepen: %s", line);
955 return 1;
956 }
957
958 return 0;
959 }
960
961 static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
962 {
963 const char *arg;
964 if (skip_prefix(line, "deepen-since ", &arg)) {
965 char *end = NULL;
966 *deepen_since = parse_timestamp(arg, &end, 0);
967 if (!end || *end || !deepen_since ||
968 /* revisions.c's max_age -1 is special */
969 *deepen_since == -1)
970 die("Invalid deepen-since: %s", line);
971 *deepen_rev_list = 1;
972 return 1;
973 }
974 return 0;
975 }
976
977 static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
978 {
979 const char *arg;
980 if (skip_prefix(line, "deepen-not ", &arg)) {
981 char *ref = NULL;
982 struct object_id oid;
983 if (expand_ref(the_repository, arg, strlen(arg), &oid, &ref) != 1)
984 die("git upload-pack: ambiguous deepen-not: %s", line);
985 string_list_append(deepen_not, ref);
986 free(ref);
987 *deepen_rev_list = 1;
988 return 1;
989 }
990 return 0;
991 }
992
993 NORETURN __attribute__((format(printf,2,3)))
994 static void send_err_and_die(struct upload_pack_data *data,
995 const char *fmt, ...)
996 {
997 struct strbuf buf = STRBUF_INIT;
998 va_list ap;
999
1000 va_start(ap, fmt);
1001 strbuf_vaddf(&buf, fmt, ap);
1002 va_end(ap);
1003
1004 packet_writer_error(&data->writer, "%s", buf.buf);
1005 die("%s", buf.buf);
1006 }
1007
1008 static void check_one_filter(struct upload_pack_data *data,
1009 struct list_objects_filter_options *opts)
1010 {
1011 const char *key = list_object_filter_config_name(opts->choice);
1012 struct string_list_item *item = string_list_lookup(&data->allowed_filters,
1013 key);
1014 int allowed;
1015
1016 if (item)
1017 allowed = (intptr_t)item->util;
1018 else
1019 allowed = data->allow_filter_fallback;
1020
1021 if (!allowed)
1022 send_err_and_die(data, "filter '%s' not supported", key);
1023
1024 if (opts->choice == LOFC_TREE_DEPTH &&
1025 opts->tree_exclude_depth > data->tree_filter_max_depth)
1026 send_err_and_die(data,
1027 "tree filter allows max depth %lu, but got %lu",
1028 data->tree_filter_max_depth,
1029 opts->tree_exclude_depth);
1030 }
1031
1032 static void check_filter_recurse(struct upload_pack_data *data,
1033 struct list_objects_filter_options *opts)
1034 {
1035 size_t i;
1036
1037 check_one_filter(data, opts);
1038 if (opts->choice != LOFC_COMBINE)
1039 return;
1040
1041 for (i = 0; i < opts->sub_nr; i++)
1042 check_filter_recurse(data, &opts->sub[i]);
1043 }
1044
1045 static void die_if_using_banned_filter(struct upload_pack_data *data)
1046 {
1047 check_filter_recurse(data, &data->filter_options);
1048 }
1049
1050 static void receive_needs(struct upload_pack_data *data,
1051 struct packet_reader *reader)
1052 {
1053 int has_non_tip = 0;
1054
1055 data->shallow_nr = 0;
1056 for (;;) {
1057 struct object *o;
1058 const char *features;
1059 struct object_id oid_buf;
1060 const char *arg;
1061
1062 reset_timeout(data->timeout);
1063 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
1064 break;
1065
1066 if (process_shallow(reader->line, &data->shallows))
1067 continue;
1068 if (process_deepen(reader->line, &data->depth))
1069 continue;
1070 if (process_deepen_since(reader->line, &data->deepen_since, &data->deepen_rev_list))
1071 continue;
1072 if (process_deepen_not(reader->line, &data->deepen_not, &data->deepen_rev_list))
1073 continue;
1074
1075 if (skip_prefix(reader->line, "filter ", &arg)) {
1076 if (!data->filter_capability_requested)
1077 die("git upload-pack: filtering capability not negotiated");
1078 list_objects_filter_die_if_populated(&data->filter_options);
1079 parse_list_objects_filter(&data->filter_options, arg);
1080 die_if_using_banned_filter(data);
1081 continue;
1082 }
1083
1084 if (!skip_prefix(reader->line, "want ", &arg) ||
1085 parse_oid_hex(arg, &oid_buf, &features))
1086 die("git upload-pack: protocol error, "
1087 "expected to get object ID, not '%s'", reader->line);
1088
1089 if (parse_feature_request(features, "deepen-relative"))
1090 data->deepen_relative = 1;
1091 if (parse_feature_request(features, "multi_ack_detailed"))
1092 data->multi_ack = MULTI_ACK_DETAILED;
1093 else if (parse_feature_request(features, "multi_ack"))
1094 data->multi_ack = MULTI_ACK;
1095 if (parse_feature_request(features, "no-done"))
1096 data->no_done = 1;
1097 if (parse_feature_request(features, "thin-pack"))
1098 data->use_thin_pack = 1;
1099 if (parse_feature_request(features, "ofs-delta"))
1100 data->use_ofs_delta = 1;
1101 if (parse_feature_request(features, "side-band-64k"))
1102 data->use_sideband = LARGE_PACKET_MAX;
1103 else if (parse_feature_request(features, "side-band"))
1104 data->use_sideband = DEFAULT_PACKET_MAX;
1105 if (parse_feature_request(features, "no-progress"))
1106 data->no_progress = 1;
1107 if (parse_feature_request(features, "include-tag"))
1108 data->use_include_tag = 1;
1109 if (data->allow_filter &&
1110 parse_feature_request(features, "filter"))
1111 data->filter_capability_requested = 1;
1112
1113 o = parse_object(the_repository, &oid_buf);
1114 if (!o) {
1115 packet_writer_error(&data->writer,
1116 "upload-pack: not our ref %s",
1117 oid_to_hex(&oid_buf));
1118 die("git upload-pack: not our ref %s",
1119 oid_to_hex(&oid_buf));
1120 }
1121 if (!(o->flags & WANTED)) {
1122 o->flags |= WANTED;
1123 if (!((data->allow_uor & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
1124 || is_our_ref(o, data->allow_uor)))
1125 has_non_tip = 1;
1126 add_object_array(o, NULL, &data->want_obj);
1127 }
1128 }
1129
1130 /*
1131 * We have sent all our refs already, and the other end
1132 * should have chosen out of them. When we are operating
1133 * in the stateless RPC mode, however, their choice may
1134 * have been based on the set of older refs advertised
1135 * by another process that handled the initial request.
1136 */
1137 if (has_non_tip)
1138 check_non_tip(data);
1139
1140 if (!data->use_sideband && data->daemon_mode)
1141 data->no_progress = 1;
1142
1143 if (data->depth == 0 && !data->deepen_rev_list && data->shallows.nr == 0)
1144 return;
1145
1146 if (send_shallow_list(data))
1147 packet_flush(1);
1148 }
1149
1150 /* return non-zero if the ref is hidden, otherwise 0 */
1151 static int mark_our_ref(const char *refname, const char *refname_full,
1152 const struct object_id *oid)
1153 {
1154 struct object *o = lookup_unknown_object(oid);
1155
1156 if (ref_is_hidden(refname, refname_full)) {
1157 o->flags |= HIDDEN_REF;
1158 return 1;
1159 }
1160 o->flags |= OUR_REF;
1161 return 0;
1162 }
1163
1164 static int check_ref(const char *refname_full, const struct object_id *oid,
1165 int flag, void *cb_data)
1166 {
1167 const char *refname = strip_namespace(refname_full);
1168
1169 mark_our_ref(refname, refname_full, oid);
1170 return 0;
1171 }
1172
1173 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
1174 {
1175 struct string_list_item *item;
1176
1177 if (!symref->nr)
1178 return;
1179 for_each_string_list_item(item, symref)
1180 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
1181 }
1182
1183 static int send_ref(const char *refname, const struct object_id *oid,
1184 int flag, void *cb_data)
1185 {
1186 static const char *capabilities = "multi_ack thin-pack side-band"
1187 " side-band-64k ofs-delta shallow deepen-since deepen-not"
1188 " deepen-relative no-progress include-tag multi_ack_detailed";
1189 const char *refname_nons = strip_namespace(refname);
1190 struct object_id peeled;
1191 struct upload_pack_data *data = cb_data;
1192
1193 if (mark_our_ref(refname_nons, refname, oid))
1194 return 0;
1195
1196 if (capabilities) {
1197 struct strbuf symref_info = STRBUF_INIT;
1198
1199 format_symref_info(&symref_info, &data->symref);
1200 packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s object-format=%s agent=%s\n",
1201 oid_to_hex(oid), refname_nons,
1202 0, capabilities,
1203 (data->allow_uor & ALLOW_TIP_SHA1) ?
1204 " allow-tip-sha1-in-want" : "",
1205 (data->allow_uor & ALLOW_REACHABLE_SHA1) ?
1206 " allow-reachable-sha1-in-want" : "",
1207 data->stateless_rpc ? " no-done" : "",
1208 symref_info.buf,
1209 data->allow_filter ? " filter" : "",
1210 the_hash_algo->name,
1211 git_user_agent_sanitized());
1212 strbuf_release(&symref_info);
1213 } else {
1214 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
1215 }
1216 capabilities = NULL;
1217 if (!peel_ref(refname, &peeled))
1218 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
1219 return 0;
1220 }
1221
1222 static int find_symref(const char *refname, const struct object_id *oid,
1223 int flag, void *cb_data)
1224 {
1225 const char *symref_target;
1226 struct string_list_item *item;
1227
1228 if ((flag & REF_ISSYMREF) == 0)
1229 return 0;
1230 symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
1231 if (!symref_target || (flag & REF_ISSYMREF) == 0)
1232 die("'%s' is a symref but it is not?", refname);
1233 item = string_list_append(cb_data, strip_namespace(refname));
1234 item->util = xstrdup(strip_namespace(symref_target));
1235 return 0;
1236 }
1237
1238 static int parse_object_filter_config(const char *var, const char *value,
1239 struct upload_pack_data *data)
1240 {
1241 struct strbuf buf = STRBUF_INIT;
1242 const char *sub, *key;
1243 size_t sub_len;
1244
1245 if (parse_config_key(var, "uploadpackfilter", &sub, &sub_len, &key))
1246 return 0;
1247
1248 if (!sub) {
1249 if (!strcmp(key, "allow"))
1250 data->allow_filter_fallback = git_config_bool(var, value);
1251 return 0;
1252 }
1253
1254 strbuf_add(&buf, sub, sub_len);
1255
1256 if (!strcmp(key, "allow"))
1257 string_list_insert(&data->allowed_filters, buf.buf)->util =
1258 (void *)(intptr_t)git_config_bool(var, value);
1259 else if (!strcmp(buf.buf, "tree") && !strcmp(key, "maxdepth")) {
1260 if (!value) {
1261 strbuf_release(&buf);
1262 return config_error_nonbool(var);
1263 }
1264 string_list_insert(&data->allowed_filters, buf.buf)->util =
1265 (void *)(intptr_t)1;
1266 data->tree_filter_max_depth = git_config_ulong(var, value);
1267 }
1268
1269 strbuf_release(&buf);
1270 return 0;
1271 }
1272
1273 static int upload_pack_config(const char *var, const char *value, void *cb_data)
1274 {
1275 struct upload_pack_data *data = cb_data;
1276
1277 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1278 if (git_config_bool(var, value))
1279 data->allow_uor |= ALLOW_TIP_SHA1;
1280 else
1281 data->allow_uor &= ~ALLOW_TIP_SHA1;
1282 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1283 if (git_config_bool(var, value))
1284 data->allow_uor |= ALLOW_REACHABLE_SHA1;
1285 else
1286 data->allow_uor &= ~ALLOW_REACHABLE_SHA1;
1287 } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1288 if (git_config_bool(var, value))
1289 data->allow_uor |= ALLOW_ANY_SHA1;
1290 else
1291 data->allow_uor &= ~ALLOW_ANY_SHA1;
1292 } else if (!strcmp("uploadpack.keepalive", var)) {
1293 data->keepalive = git_config_int(var, value);
1294 if (!data->keepalive)
1295 data->keepalive = -1;
1296 } else if (!strcmp("uploadpack.allowfilter", var)) {
1297 data->allow_filter = git_config_bool(var, value);
1298 } else if (!strcmp("uploadpack.allowrefinwant", var)) {
1299 data->allow_ref_in_want = git_config_bool(var, value);
1300 } else if (!strcmp("uploadpack.allowsidebandall", var)) {
1301 data->allow_sideband_all = git_config_bool(var, value);
1302 } else if (!strcmp("core.precomposeunicode", var)) {
1303 precomposed_unicode = git_config_bool(var, value);
1304 }
1305
1306 if (current_config_scope() != CONFIG_SCOPE_LOCAL &&
1307 current_config_scope() != CONFIG_SCOPE_WORKTREE) {
1308 if (!strcmp("uploadpack.packobjectshook", var))
1309 return git_config_string(&data->pack_objects_hook, var, value);
1310 }
1311
1312 parse_object_filter_config(var, value, data);
1313
1314 return parse_hide_refs_config(var, value, "uploadpack");
1315 }
1316
1317 void upload_pack(struct upload_pack_options *options)
1318 {
1319 struct packet_reader reader;
1320 struct upload_pack_data data;
1321
1322 upload_pack_data_init(&data);
1323
1324 git_config(upload_pack_config, &data);
1325
1326 data.stateless_rpc = options->stateless_rpc;
1327 data.daemon_mode = options->daemon_mode;
1328 data.timeout = options->timeout;
1329
1330 head_ref_namespaced(find_symref, &data.symref);
1331
1332 if (options->advertise_refs || !data.stateless_rpc) {
1333 reset_timeout(data.timeout);
1334 head_ref_namespaced(send_ref, &data);
1335 for_each_namespaced_ref(send_ref, &data);
1336 advertise_shallow_grafts(1);
1337 packet_flush(1);
1338 } else {
1339 head_ref_namespaced(check_ref, NULL);
1340 for_each_namespaced_ref(check_ref, NULL);
1341 }
1342
1343 if (!options->advertise_refs) {
1344 packet_reader_init(&reader, 0, NULL, 0,
1345 PACKET_READ_CHOMP_NEWLINE |
1346 PACKET_READ_DIE_ON_ERR_PACKET);
1347
1348 receive_needs(&data, &reader);
1349 if (data.want_obj.nr) {
1350 get_common_commits(&data, &reader);
1351 create_pack_file(&data, NULL);
1352 }
1353 }
1354
1355 upload_pack_data_clear(&data);
1356 }
1357
1358 static int parse_want(struct packet_writer *writer, const char *line,
1359 struct object_array *want_obj)
1360 {
1361 const char *arg;
1362 if (skip_prefix(line, "want ", &arg)) {
1363 struct object_id oid;
1364 struct object *o;
1365
1366 if (get_oid_hex(arg, &oid))
1367 die("git upload-pack: protocol error, "
1368 "expected to get oid, not '%s'", line);
1369
1370 o = parse_object(the_repository, &oid);
1371 if (!o) {
1372 packet_writer_error(writer,
1373 "upload-pack: not our ref %s",
1374 oid_to_hex(&oid));
1375 die("git upload-pack: not our ref %s",
1376 oid_to_hex(&oid));
1377 }
1378
1379 if (!(o->flags & WANTED)) {
1380 o->flags |= WANTED;
1381 add_object_array(o, NULL, want_obj);
1382 }
1383
1384 return 1;
1385 }
1386
1387 return 0;
1388 }
1389
1390 static int parse_want_ref(struct packet_writer *writer, const char *line,
1391 struct string_list *wanted_refs,
1392 struct object_array *want_obj)
1393 {
1394 const char *arg;
1395 if (skip_prefix(line, "want-ref ", &arg)) {
1396 struct object_id oid;
1397 struct string_list_item *item;
1398 struct object *o;
1399
1400 if (read_ref(arg, &oid)) {
1401 packet_writer_error(writer, "unknown ref %s", arg);
1402 die("unknown ref %s", arg);
1403 }
1404
1405 item = string_list_append(wanted_refs, arg);
1406 item->util = oiddup(&oid);
1407
1408 o = parse_object_or_die(&oid, arg);
1409 if (!(o->flags & WANTED)) {
1410 o->flags |= WANTED;
1411 add_object_array(o, NULL, want_obj);
1412 }
1413
1414 return 1;
1415 }
1416
1417 return 0;
1418 }
1419
1420 static int parse_have(const char *line, struct oid_array *haves)
1421 {
1422 const char *arg;
1423 if (skip_prefix(line, "have ", &arg)) {
1424 struct object_id oid;
1425
1426 if (get_oid_hex(arg, &oid))
1427 die("git upload-pack: expected SHA1 object, got '%s'", arg);
1428 oid_array_append(haves, &oid);
1429 return 1;
1430 }
1431
1432 return 0;
1433 }
1434
1435 static void process_args(struct packet_reader *request,
1436 struct upload_pack_data *data)
1437 {
1438 while (packet_reader_read(request) == PACKET_READ_NORMAL) {
1439 const char *arg = request->line;
1440 const char *p;
1441
1442 /* process want */
1443 if (parse_want(&data->writer, arg, &data->want_obj))
1444 continue;
1445 if (data->allow_ref_in_want &&
1446 parse_want_ref(&data->writer, arg, &data->wanted_refs,
1447 &data->want_obj))
1448 continue;
1449 /* process have line */
1450 if (parse_have(arg, &data->haves))
1451 continue;
1452
1453 /* process args like thin-pack */
1454 if (!strcmp(arg, "thin-pack")) {
1455 data->use_thin_pack = 1;
1456 continue;
1457 }
1458 if (!strcmp(arg, "ofs-delta")) {
1459 data->use_ofs_delta = 1;
1460 continue;
1461 }
1462 if (!strcmp(arg, "no-progress")) {
1463 data->no_progress = 1;
1464 continue;
1465 }
1466 if (!strcmp(arg, "include-tag")) {
1467 data->use_include_tag = 1;
1468 continue;
1469 }
1470 if (!strcmp(arg, "done")) {
1471 data->done = 1;
1472 continue;
1473 }
1474
1475 /* Shallow related arguments */
1476 if (process_shallow(arg, &data->shallows))
1477 continue;
1478 if (process_deepen(arg, &data->depth))
1479 continue;
1480 if (process_deepen_since(arg, &data->deepen_since,
1481 &data->deepen_rev_list))
1482 continue;
1483 if (process_deepen_not(arg, &data->deepen_not,
1484 &data->deepen_rev_list))
1485 continue;
1486 if (!strcmp(arg, "deepen-relative")) {
1487 data->deepen_relative = 1;
1488 continue;
1489 }
1490
1491 if (data->allow_filter && skip_prefix(arg, "filter ", &p)) {
1492 list_objects_filter_die_if_populated(&data->filter_options);
1493 parse_list_objects_filter(&data->filter_options, p);
1494 die_if_using_banned_filter(data);
1495 continue;
1496 }
1497
1498 if ((git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1499 data->allow_sideband_all) &&
1500 !strcmp(arg, "sideband-all")) {
1501 data->writer.use_sideband = 1;
1502 continue;
1503 }
1504
1505 if (skip_prefix(arg, "packfile-uris ", &p)) {
1506 string_list_split(&data->uri_protocols, p, ',', -1);
1507 continue;
1508 }
1509
1510 /* ignore unknown lines maybe? */
1511 die("unexpected line: '%s'", arg);
1512 }
1513
1514 if (data->uri_protocols.nr && !data->writer.use_sideband)
1515 string_list_clear(&data->uri_protocols, 0);
1516
1517 if (request->status != PACKET_READ_FLUSH)
1518 die(_("expected flush after fetch arguments"));
1519 }
1520
1521 static int process_haves(struct upload_pack_data *data, struct oid_array *common)
1522 {
1523 int i;
1524
1525 /* Process haves */
1526 for (i = 0; i < data->haves.nr; i++) {
1527 const struct object_id *oid = &data->haves.oid[i];
1528
1529 if (!has_object_file_with_flags(oid,
1530 OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT))
1531 continue;
1532
1533 oid_array_append(common, oid);
1534
1535 do_got_oid(data, oid);
1536 }
1537
1538 return 0;
1539 }
1540
1541 static int send_acks(struct upload_pack_data *data, struct oid_array *acks)
1542 {
1543 int i;
1544
1545 packet_writer_write(&data->writer, "acknowledgments\n");
1546
1547 /* Send Acks */
1548 if (!acks->nr)
1549 packet_writer_write(&data->writer, "NAK\n");
1550
1551 for (i = 0; i < acks->nr; i++) {
1552 packet_writer_write(&data->writer, "ACK %s\n",
1553 oid_to_hex(&acks->oid[i]));
1554 }
1555
1556 if (ok_to_give_up(data)) {
1557 /* Send Ready */
1558 packet_writer_write(&data->writer, "ready\n");
1559 return 1;
1560 }
1561
1562 return 0;
1563 }
1564
1565 static int process_haves_and_send_acks(struct upload_pack_data *data)
1566 {
1567 struct oid_array common = OID_ARRAY_INIT;
1568 int ret = 0;
1569
1570 process_haves(data, &common);
1571 if (data->done) {
1572 ret = 1;
1573 } else if (send_acks(data, &common)) {
1574 packet_writer_delim(&data->writer);
1575 ret = 1;
1576 } else {
1577 /* Add Flush */
1578 packet_writer_flush(&data->writer);
1579 ret = 0;
1580 }
1581
1582 oid_array_clear(&data->haves);
1583 oid_array_clear(&common);
1584 return ret;
1585 }
1586
1587 static void send_wanted_ref_info(struct upload_pack_data *data)
1588 {
1589 const struct string_list_item *item;
1590
1591 if (!data->wanted_refs.nr)
1592 return;
1593
1594 packet_writer_write(&data->writer, "wanted-refs\n");
1595
1596 for_each_string_list_item(item, &data->wanted_refs) {
1597 packet_writer_write(&data->writer, "%s %s\n",
1598 oid_to_hex(item->util),
1599 item->string);
1600 }
1601
1602 packet_writer_delim(&data->writer);
1603 }
1604
1605 static void send_shallow_info(struct upload_pack_data *data)
1606 {
1607 /* No shallow info needs to be sent */
1608 if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1609 !is_repository_shallow(the_repository))
1610 return;
1611
1612 packet_writer_write(&data->writer, "shallow-info\n");
1613
1614 if (!send_shallow_list(data) &&
1615 is_repository_shallow(the_repository))
1616 deepen(data, INFINITE_DEPTH);
1617
1618 packet_delim(1);
1619 }
1620
1621 enum fetch_state {
1622 FETCH_PROCESS_ARGS = 0,
1623 FETCH_SEND_ACKS,
1624 FETCH_SEND_PACK,
1625 FETCH_DONE,
1626 };
1627
1628 int upload_pack_v2(struct repository *r, struct strvec *keys,
1629 struct packet_reader *request)
1630 {
1631 enum fetch_state state = FETCH_PROCESS_ARGS;
1632 struct upload_pack_data data;
1633
1634 clear_object_flags(ALL_FLAGS);
1635
1636 upload_pack_data_init(&data);
1637 data.use_sideband = LARGE_PACKET_MAX;
1638
1639 git_config(upload_pack_config, &data);
1640
1641 while (state != FETCH_DONE) {
1642 switch (state) {
1643 case FETCH_PROCESS_ARGS:
1644 process_args(request, &data);
1645
1646 if (!data.want_obj.nr) {
1647 /*
1648 * Request didn't contain any 'want' lines,
1649 * guess they didn't want anything.
1650 */
1651 state = FETCH_DONE;
1652 } else if (data.haves.nr) {
1653 /*
1654 * Request had 'have' lines, so lets ACK them.
1655 */
1656 state = FETCH_SEND_ACKS;
1657 } else {
1658 /*
1659 * Request had 'want's but no 'have's so we can
1660 * immedietly go to construct and send a pack.
1661 */
1662 state = FETCH_SEND_PACK;
1663 }
1664 break;
1665 case FETCH_SEND_ACKS:
1666 if (process_haves_and_send_acks(&data))
1667 state = FETCH_SEND_PACK;
1668 else
1669 state = FETCH_DONE;
1670 break;
1671 case FETCH_SEND_PACK:
1672 send_wanted_ref_info(&data);
1673 send_shallow_info(&data);
1674
1675 if (data.uri_protocols.nr) {
1676 create_pack_file(&data, &data.uri_protocols);
1677 } else {
1678 packet_writer_write(&data.writer, "packfile\n");
1679 create_pack_file(&data, NULL);
1680 }
1681 state = FETCH_DONE;
1682 break;
1683 case FETCH_DONE:
1684 continue;
1685 }
1686 }
1687
1688 upload_pack_data_clear(&data);
1689 return 0;
1690 }
1691
1692 int upload_pack_advertise(struct repository *r,
1693 struct strbuf *value)
1694 {
1695 if (value) {
1696 int allow_filter_value;
1697 int allow_ref_in_want;
1698 int allow_sideband_all_value;
1699 char *str = NULL;
1700
1701 strbuf_addstr(value, "shallow");
1702
1703 if (!repo_config_get_bool(the_repository,
1704 "uploadpack.allowfilter",
1705 &allow_filter_value) &&
1706 allow_filter_value)
1707 strbuf_addstr(value, " filter");
1708
1709 if (!repo_config_get_bool(the_repository,
1710 "uploadpack.allowrefinwant",
1711 &allow_ref_in_want) &&
1712 allow_ref_in_want)
1713 strbuf_addstr(value, " ref-in-want");
1714
1715 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1716 (!repo_config_get_bool(the_repository,
1717 "uploadpack.allowsidebandall",
1718 &allow_sideband_all_value) &&
1719 allow_sideband_all_value))
1720 strbuf_addstr(value, " sideband-all");
1721
1722 if (!repo_config_get_string(the_repository,
1723 "uploadpack.blobpackfileuri",
1724 &str) &&
1725 str) {
1726 strbuf_addstr(value, " packfile-uris");
1727 free(str);
1728 }
1729 }
1730
1731 return 1;
1732 }
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