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list-objects-filter: add and use initializers
[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 "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 wait_for_done : 1;
107 unsigned allow_filter : 1;
108 unsigned allow_filter_fallback : 1;
109 unsigned long tree_filter_max_depth;
110
111 unsigned done : 1; /* v2 only */
112 unsigned allow_ref_in_want : 1; /* v2 only */
113 unsigned allow_sideband_all : 1; /* v2 only */
114 unsigned advertise_sid : 1;
115 };
116
117 static void upload_pack_data_init(struct upload_pack_data *data)
118 {
119 struct string_list symref = STRING_LIST_INIT_DUP;
120 struct string_list wanted_refs = STRING_LIST_INIT_DUP;
121 struct object_array want_obj = OBJECT_ARRAY_INIT;
122 struct object_array have_obj = OBJECT_ARRAY_INIT;
123 struct oid_array haves = OID_ARRAY_INIT;
124 struct object_array shallows = OBJECT_ARRAY_INIT;
125 struct string_list deepen_not = STRING_LIST_INIT_DUP;
126 struct string_list uri_protocols = STRING_LIST_INIT_DUP;
127 struct object_array extra_edge_obj = OBJECT_ARRAY_INIT;
128 struct string_list allowed_filters = STRING_LIST_INIT_DUP;
129
130 memset(data, 0, sizeof(*data));
131 data->symref = symref;
132 data->wanted_refs = wanted_refs;
133 data->want_obj = want_obj;
134 data->have_obj = have_obj;
135 data->haves = haves;
136 data->shallows = shallows;
137 data->deepen_not = deepen_not;
138 data->uri_protocols = uri_protocols;
139 data->extra_edge_obj = extra_edge_obj;
140 data->allowed_filters = allowed_filters;
141 data->allow_filter_fallback = 1;
142 data->tree_filter_max_depth = ULONG_MAX;
143 packet_writer_init(&data->writer, 1);
144 list_objects_filter_init(&data->filter_options);
145
146 data->keepalive = 5;
147 data->advertise_sid = 0;
148 }
149
150 static void upload_pack_data_clear(struct upload_pack_data *data)
151 {
152 string_list_clear(&data->symref, 1);
153 string_list_clear(&data->wanted_refs, 1);
154 object_array_clear(&data->want_obj);
155 object_array_clear(&data->have_obj);
156 oid_array_clear(&data->haves);
157 object_array_clear(&data->shallows);
158 string_list_clear(&data->deepen_not, 0);
159 object_array_clear(&data->extra_edge_obj);
160 list_objects_filter_release(&data->filter_options);
161 string_list_clear(&data->allowed_filters, 0);
162
163 free((char *)data->pack_objects_hook);
164 }
165
166 static void reset_timeout(unsigned int timeout)
167 {
168 alarm(timeout);
169 }
170
171 static void send_client_data(int fd, const char *data, ssize_t sz,
172 int use_sideband)
173 {
174 if (use_sideband) {
175 send_sideband(1, fd, data, sz, use_sideband);
176 return;
177 }
178 if (fd == 3)
179 /* emergency quit */
180 fd = 2;
181 if (fd == 2) {
182 /* XXX: are we happy to lose stuff here? */
183 xwrite(fd, data, sz);
184 return;
185 }
186 write_or_die(fd, data, sz);
187 }
188
189 static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
190 {
191 FILE *fp = cb_data;
192 if (graft->nr_parent == -1)
193 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
194 return 0;
195 }
196
197 struct output_state {
198 /*
199 * We do writes no bigger than LARGE_PACKET_DATA_MAX - 1, because with
200 * sideband-64k the band designator takes up 1 byte of space. Because
201 * relay_pack_data keeps the last byte to itself, we make the buffer 1
202 * byte bigger than the intended maximum write size.
203 */
204 char buffer[(LARGE_PACKET_DATA_MAX - 1) + 1];
205 int used;
206 unsigned packfile_uris_started : 1;
207 unsigned packfile_started : 1;
208 };
209
210 static int relay_pack_data(int pack_objects_out, struct output_state *os,
211 int use_sideband, int write_packfile_line)
212 {
213 /*
214 * We keep the last byte to ourselves
215 * in case we detect broken rev-list, so that we
216 * can leave the stream corrupted. This is
217 * unfortunate -- unpack-objects would happily
218 * accept a valid packdata with trailing garbage,
219 * so appending garbage after we pass all the
220 * pack data is not good enough to signal
221 * breakage to downstream.
222 */
223 ssize_t readsz;
224
225 readsz = xread(pack_objects_out, os->buffer + os->used,
226 sizeof(os->buffer) - os->used);
227 if (readsz < 0) {
228 return readsz;
229 }
230 os->used += readsz;
231
232 while (!os->packfile_started) {
233 char *p;
234 if (os->used >= 4 && !memcmp(os->buffer, "PACK", 4)) {
235 os->packfile_started = 1;
236 if (write_packfile_line) {
237 if (os->packfile_uris_started)
238 packet_delim(1);
239 packet_write_fmt(1, "\1packfile\n");
240 }
241 break;
242 }
243 if ((p = memchr(os->buffer, '\n', os->used))) {
244 if (!os->packfile_uris_started) {
245 os->packfile_uris_started = 1;
246 if (!write_packfile_line)
247 BUG("packfile_uris requires sideband-all");
248 packet_write_fmt(1, "\1packfile-uris\n");
249 }
250 *p = '\0';
251 packet_write_fmt(1, "\1%s\n", os->buffer);
252
253 os->used -= p - os->buffer + 1;
254 memmove(os->buffer, p + 1, os->used);
255 } else {
256 /*
257 * Incomplete line.
258 */
259 return readsz;
260 }
261 }
262
263 if (os->used > 1) {
264 send_client_data(1, os->buffer, os->used - 1, use_sideband);
265 os->buffer[0] = os->buffer[os->used - 1];
266 os->used = 1;
267 } else {
268 send_client_data(1, os->buffer, os->used, use_sideband);
269 os->used = 0;
270 }
271
272 return readsz;
273 }
274
275 static void create_pack_file(struct upload_pack_data *pack_data,
276 const struct string_list *uri_protocols)
277 {
278 struct child_process pack_objects = CHILD_PROCESS_INIT;
279 struct output_state *output_state = xcalloc(1, sizeof(struct output_state));
280 char progress[128];
281 char abort_msg[] = "aborting due to possible repository "
282 "corruption on the remote side.";
283 ssize_t sz;
284 int i;
285 FILE *pipe_fd;
286
287 if (!pack_data->pack_objects_hook)
288 pack_objects.git_cmd = 1;
289 else {
290 strvec_push(&pack_objects.args, pack_data->pack_objects_hook);
291 strvec_push(&pack_objects.args, "git");
292 pack_objects.use_shell = 1;
293 }
294
295 if (pack_data->shallow_nr) {
296 strvec_push(&pack_objects.args, "--shallow-file");
297 strvec_push(&pack_objects.args, "");
298 }
299 strvec_push(&pack_objects.args, "pack-objects");
300 strvec_push(&pack_objects.args, "--revs");
301 if (pack_data->use_thin_pack)
302 strvec_push(&pack_objects.args, "--thin");
303
304 strvec_push(&pack_objects.args, "--stdout");
305 if (pack_data->shallow_nr)
306 strvec_push(&pack_objects.args, "--shallow");
307 if (!pack_data->no_progress)
308 strvec_push(&pack_objects.args, "--progress");
309 if (pack_data->use_ofs_delta)
310 strvec_push(&pack_objects.args, "--delta-base-offset");
311 if (pack_data->use_include_tag)
312 strvec_push(&pack_objects.args, "--include-tag");
313 if (pack_data->filter_options.choice) {
314 const char *spec =
315 expand_list_objects_filter_spec(&pack_data->filter_options);
316 strvec_pushf(&pack_objects.args, "--filter=%s", spec);
317 }
318 if (uri_protocols) {
319 for (i = 0; i < uri_protocols->nr; i++)
320 strvec_pushf(&pack_objects.args, "--uri-protocol=%s",
321 uri_protocols->items[i].string);
322 }
323
324 pack_objects.in = -1;
325 pack_objects.out = -1;
326 pack_objects.err = -1;
327 pack_objects.clean_on_exit = 1;
328
329 if (start_command(&pack_objects))
330 die("git upload-pack: unable to fork git-pack-objects");
331
332 pipe_fd = xfdopen(pack_objects.in, "w");
333
334 if (pack_data->shallow_nr)
335 for_each_commit_graft(write_one_shallow, pipe_fd);
336
337 for (i = 0; i < pack_data->want_obj.nr; i++)
338 fprintf(pipe_fd, "%s\n",
339 oid_to_hex(&pack_data->want_obj.objects[i].item->oid));
340 fprintf(pipe_fd, "--not\n");
341 for (i = 0; i < pack_data->have_obj.nr; i++)
342 fprintf(pipe_fd, "%s\n",
343 oid_to_hex(&pack_data->have_obj.objects[i].item->oid));
344 for (i = 0; i < pack_data->extra_edge_obj.nr; i++)
345 fprintf(pipe_fd, "%s\n",
346 oid_to_hex(&pack_data->extra_edge_obj.objects[i].item->oid));
347 fprintf(pipe_fd, "\n");
348 fflush(pipe_fd);
349 fclose(pipe_fd);
350
351 /* We read from pack_objects.err to capture stderr output for
352 * progress bar, and pack_objects.out to capture the pack data.
353 */
354
355 while (1) {
356 struct pollfd pfd[2];
357 int pe, pu, pollsize, polltimeout;
358 int ret;
359
360 reset_timeout(pack_data->timeout);
361
362 pollsize = 0;
363 pe = pu = -1;
364
365 if (0 <= pack_objects.out) {
366 pfd[pollsize].fd = pack_objects.out;
367 pfd[pollsize].events = POLLIN;
368 pu = pollsize;
369 pollsize++;
370 }
371 if (0 <= pack_objects.err) {
372 pfd[pollsize].fd = pack_objects.err;
373 pfd[pollsize].events = POLLIN;
374 pe = pollsize;
375 pollsize++;
376 }
377
378 if (!pollsize)
379 break;
380
381 polltimeout = pack_data->keepalive < 0
382 ? -1
383 : 1000 * pack_data->keepalive;
384
385 ret = poll(pfd, pollsize, polltimeout);
386
387 if (ret < 0) {
388 if (errno != EINTR) {
389 error_errno("poll failed, resuming");
390 sleep(1);
391 }
392 continue;
393 }
394 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
395 /* Status ready; we ship that in the side-band
396 * or dump to the standard error.
397 */
398 sz = xread(pack_objects.err, progress,
399 sizeof(progress));
400 if (0 < sz)
401 send_client_data(2, progress, sz,
402 pack_data->use_sideband);
403 else if (sz == 0) {
404 close(pack_objects.err);
405 pack_objects.err = -1;
406 }
407 else
408 goto fail;
409 /* give priority to status messages */
410 continue;
411 }
412 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
413 int result = relay_pack_data(pack_objects.out,
414 output_state,
415 pack_data->use_sideband,
416 !!uri_protocols);
417
418 if (result == 0) {
419 close(pack_objects.out);
420 pack_objects.out = -1;
421 } else if (result < 0) {
422 goto fail;
423 }
424 }
425
426 /*
427 * We hit the keepalive timeout without saying anything; send
428 * an empty message on the data sideband just to let the other
429 * side know we're still working on it, but don't have any data
430 * yet.
431 *
432 * If we don't have a sideband channel, there's no room in the
433 * protocol to say anything, so those clients are just out of
434 * luck.
435 */
436 if (!ret && pack_data->use_sideband) {
437 static const char buf[] = "0005\1";
438 write_or_die(1, buf, 5);
439 }
440 }
441
442 if (finish_command(&pack_objects)) {
443 error("git upload-pack: git-pack-objects died with error.");
444 goto fail;
445 }
446
447 /* flush the data */
448 if (output_state->used > 0) {
449 send_client_data(1, output_state->buffer, output_state->used,
450 pack_data->use_sideband);
451 fprintf(stderr, "flushed.\n");
452 }
453 free(output_state);
454 if (pack_data->use_sideband)
455 packet_flush(1);
456 return;
457
458 fail:
459 send_client_data(3, abort_msg, sizeof(abort_msg),
460 pack_data->use_sideband);
461 die("git upload-pack: %s", abort_msg);
462 }
463
464 static int do_got_oid(struct upload_pack_data *data, const struct object_id *oid)
465 {
466 int we_knew_they_have = 0;
467 struct object *o = parse_object(the_repository, oid);
468
469 if (!o)
470 die("oops (%s)", oid_to_hex(oid));
471 if (o->type == OBJ_COMMIT) {
472 struct commit_list *parents;
473 struct commit *commit = (struct commit *)o;
474 if (o->flags & THEY_HAVE)
475 we_knew_they_have = 1;
476 else
477 o->flags |= THEY_HAVE;
478 if (!data->oldest_have || (commit->date < data->oldest_have))
479 data->oldest_have = commit->date;
480 for (parents = commit->parents;
481 parents;
482 parents = parents->next)
483 parents->item->object.flags |= THEY_HAVE;
484 }
485 if (!we_knew_they_have) {
486 add_object_array(o, NULL, &data->have_obj);
487 return 1;
488 }
489 return 0;
490 }
491
492 static int got_oid(struct upload_pack_data *data,
493 const char *hex, struct object_id *oid)
494 {
495 if (get_oid_hex(hex, oid))
496 die("git upload-pack: expected SHA1 object, got '%s'", hex);
497 if (!has_object_file_with_flags(oid,
498 OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT))
499 return -1;
500 return do_got_oid(data, oid);
501 }
502
503 static int ok_to_give_up(struct upload_pack_data *data)
504 {
505 timestamp_t min_generation = GENERATION_NUMBER_ZERO;
506
507 if (!data->have_obj.nr)
508 return 0;
509
510 return can_all_from_reach_with_flag(&data->want_obj, THEY_HAVE,
511 COMMON_KNOWN, data->oldest_have,
512 min_generation);
513 }
514
515 static int get_common_commits(struct upload_pack_data *data,
516 struct packet_reader *reader)
517 {
518 struct object_id oid;
519 char last_hex[GIT_MAX_HEXSZ + 1];
520 int got_common = 0;
521 int got_other = 0;
522 int sent_ready = 0;
523
524 save_commit_buffer = 0;
525
526 for (;;) {
527 const char *arg;
528
529 reset_timeout(data->timeout);
530
531 if (packet_reader_read(reader) != PACKET_READ_NORMAL) {
532 if (data->multi_ack == MULTI_ACK_DETAILED
533 && got_common
534 && !got_other
535 && ok_to_give_up(data)) {
536 sent_ready = 1;
537 packet_write_fmt(1, "ACK %s ready\n", last_hex);
538 }
539 if (data->have_obj.nr == 0 || data->multi_ack)
540 packet_write_fmt(1, "NAK\n");
541
542 if (data->no_done && sent_ready) {
543 packet_write_fmt(1, "ACK %s\n", last_hex);
544 return 0;
545 }
546 if (data->stateless_rpc)
547 exit(0);
548 got_common = 0;
549 got_other = 0;
550 continue;
551 }
552 if (skip_prefix(reader->line, "have ", &arg)) {
553 switch (got_oid(data, arg, &oid)) {
554 case -1: /* they have what we do not */
555 got_other = 1;
556 if (data->multi_ack
557 && ok_to_give_up(data)) {
558 const char *hex = oid_to_hex(&oid);
559 if (data->multi_ack == MULTI_ACK_DETAILED) {
560 sent_ready = 1;
561 packet_write_fmt(1, "ACK %s ready\n", hex);
562 } else
563 packet_write_fmt(1, "ACK %s continue\n", hex);
564 }
565 break;
566 default:
567 got_common = 1;
568 oid_to_hex_r(last_hex, &oid);
569 if (data->multi_ack == MULTI_ACK_DETAILED)
570 packet_write_fmt(1, "ACK %s common\n", last_hex);
571 else if (data->multi_ack)
572 packet_write_fmt(1, "ACK %s continue\n", last_hex);
573 else if (data->have_obj.nr == 1)
574 packet_write_fmt(1, "ACK %s\n", last_hex);
575 break;
576 }
577 continue;
578 }
579 if (!strcmp(reader->line, "done")) {
580 if (data->have_obj.nr > 0) {
581 if (data->multi_ack)
582 packet_write_fmt(1, "ACK %s\n", last_hex);
583 return 0;
584 }
585 packet_write_fmt(1, "NAK\n");
586 return -1;
587 }
588 die("git upload-pack: expected SHA1 list, got '%s'", reader->line);
589 }
590 }
591
592 static int is_our_ref(struct object *o, enum allow_uor allow_uor)
593 {
594 int allow_hidden_ref = (allow_uor &
595 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
596 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
597 }
598
599 /*
600 * on successful case, it's up to the caller to close cmd->out
601 */
602 static int do_reachable_revlist(struct child_process *cmd,
603 struct object_array *src,
604 struct object_array *reachable,
605 enum allow_uor allow_uor)
606 {
607 struct object *o;
608 FILE *cmd_in = NULL;
609 int i;
610
611 strvec_pushl(&cmd->args, "rev-list", "--stdin", NULL);
612 cmd->git_cmd = 1;
613 cmd->no_stderr = 1;
614 cmd->in = -1;
615 cmd->out = -1;
616
617 /*
618 * If the next rev-list --stdin encounters an unknown commit,
619 * it terminates, which will cause SIGPIPE in the write loop
620 * below.
621 */
622 sigchain_push(SIGPIPE, SIG_IGN);
623
624 if (start_command(cmd))
625 goto error;
626
627 cmd_in = xfdopen(cmd->in, "w");
628
629 for (i = get_max_object_index(); 0 < i; ) {
630 o = get_indexed_object(--i);
631 if (!o)
632 continue;
633 if (reachable && o->type == OBJ_COMMIT)
634 o->flags &= ~TMP_MARK;
635 if (!is_our_ref(o, allow_uor))
636 continue;
637 if (fprintf(cmd_in, "^%s\n", oid_to_hex(&o->oid)) < 0)
638 goto error;
639 }
640 for (i = 0; i < src->nr; i++) {
641 o = src->objects[i].item;
642 if (is_our_ref(o, allow_uor)) {
643 if (reachable)
644 add_object_array(o, NULL, reachable);
645 continue;
646 }
647 if (reachable && o->type == OBJ_COMMIT)
648 o->flags |= TMP_MARK;
649 if (fprintf(cmd_in, "%s\n", oid_to_hex(&o->oid)) < 0)
650 goto error;
651 }
652 if (ferror(cmd_in) || fflush(cmd_in))
653 goto error;
654 fclose(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)
664 fclose(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 int feature_len;
1062
1063 reset_timeout(data->timeout);
1064 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
1065 break;
1066
1067 if (process_shallow(reader->line, &data->shallows))
1068 continue;
1069 if (process_deepen(reader->line, &data->depth))
1070 continue;
1071 if (process_deepen_since(reader->line, &data->deepen_since, &data->deepen_rev_list))
1072 continue;
1073 if (process_deepen_not(reader->line, &data->deepen_not, &data->deepen_rev_list))
1074 continue;
1075
1076 if (skip_prefix(reader->line, "filter ", &arg)) {
1077 if (!data->filter_capability_requested)
1078 die("git upload-pack: filtering capability not negotiated");
1079 list_objects_filter_die_if_populated(&data->filter_options);
1080 parse_list_objects_filter(&data->filter_options, arg);
1081 die_if_using_banned_filter(data);
1082 continue;
1083 }
1084
1085 if (!skip_prefix(reader->line, "want ", &arg) ||
1086 parse_oid_hex(arg, &oid_buf, &features))
1087 die("git upload-pack: protocol error, "
1088 "expected to get object ID, not '%s'", reader->line);
1089
1090 if (parse_feature_request(features, "deepen-relative"))
1091 data->deepen_relative = 1;
1092 if (parse_feature_request(features, "multi_ack_detailed"))
1093 data->multi_ack = MULTI_ACK_DETAILED;
1094 else if (parse_feature_request(features, "multi_ack"))
1095 data->multi_ack = MULTI_ACK;
1096 if (parse_feature_request(features, "no-done"))
1097 data->no_done = 1;
1098 if (parse_feature_request(features, "thin-pack"))
1099 data->use_thin_pack = 1;
1100 if (parse_feature_request(features, "ofs-delta"))
1101 data->use_ofs_delta = 1;
1102 if (parse_feature_request(features, "side-band-64k"))
1103 data->use_sideband = LARGE_PACKET_MAX;
1104 else if (parse_feature_request(features, "side-band"))
1105 data->use_sideband = DEFAULT_PACKET_MAX;
1106 if (parse_feature_request(features, "no-progress"))
1107 data->no_progress = 1;
1108 if (parse_feature_request(features, "include-tag"))
1109 data->use_include_tag = 1;
1110 if (data->allow_filter &&
1111 parse_feature_request(features, "filter"))
1112 data->filter_capability_requested = 1;
1113
1114 arg = parse_feature_value(features, "session-id", &feature_len, NULL);
1115 if (arg) {
1116 char *client_sid = xstrndup(arg, feature_len);
1117 trace2_data_string("transfer", NULL, "client-sid", client_sid);
1118 free(client_sid);
1119 }
1120
1121 o = parse_object(the_repository, &oid_buf);
1122 if (!o) {
1123 packet_writer_error(&data->writer,
1124 "upload-pack: not our ref %s",
1125 oid_to_hex(&oid_buf));
1126 die("git upload-pack: not our ref %s",
1127 oid_to_hex(&oid_buf));
1128 }
1129 if (!(o->flags & WANTED)) {
1130 o->flags |= WANTED;
1131 if (!((data->allow_uor & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
1132 || is_our_ref(o, data->allow_uor)))
1133 has_non_tip = 1;
1134 add_object_array(o, NULL, &data->want_obj);
1135 }
1136 }
1137
1138 /*
1139 * We have sent all our refs already, and the other end
1140 * should have chosen out of them. When we are operating
1141 * in the stateless RPC mode, however, their choice may
1142 * have been based on the set of older refs advertised
1143 * by another process that handled the initial request.
1144 */
1145 if (has_non_tip)
1146 check_non_tip(data);
1147
1148 if (!data->use_sideband && data->daemon_mode)
1149 data->no_progress = 1;
1150
1151 if (data->depth == 0 && !data->deepen_rev_list && data->shallows.nr == 0)
1152 return;
1153
1154 if (send_shallow_list(data))
1155 packet_flush(1);
1156 }
1157
1158 /* return non-zero if the ref is hidden, otherwise 0 */
1159 static int mark_our_ref(const char *refname, const char *refname_full,
1160 const struct object_id *oid)
1161 {
1162 struct object *o = lookup_unknown_object(the_repository, oid);
1163
1164 if (ref_is_hidden(refname, refname_full)) {
1165 o->flags |= HIDDEN_REF;
1166 return 1;
1167 }
1168 o->flags |= OUR_REF;
1169 return 0;
1170 }
1171
1172 static int check_ref(const char *refname_full, const struct object_id *oid,
1173 int flag, void *cb_data)
1174 {
1175 const char *refname = strip_namespace(refname_full);
1176
1177 mark_our_ref(refname, refname_full, oid);
1178 return 0;
1179 }
1180
1181 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
1182 {
1183 struct string_list_item *item;
1184
1185 if (!symref->nr)
1186 return;
1187 for_each_string_list_item(item, symref)
1188 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
1189 }
1190
1191 static void format_session_id(struct strbuf *buf, struct upload_pack_data *d) {
1192 if (d->advertise_sid)
1193 strbuf_addf(buf, " session-id=%s", trace2_session_id());
1194 }
1195
1196 static int send_ref(const char *refname, const struct object_id *oid,
1197 int flag, void *cb_data)
1198 {
1199 static const char *capabilities = "multi_ack thin-pack side-band"
1200 " side-band-64k ofs-delta shallow deepen-since deepen-not"
1201 " deepen-relative no-progress include-tag multi_ack_detailed";
1202 const char *refname_nons = strip_namespace(refname);
1203 struct object_id peeled;
1204 struct upload_pack_data *data = cb_data;
1205
1206 if (mark_our_ref(refname_nons, refname, oid))
1207 return 0;
1208
1209 if (capabilities) {
1210 struct strbuf symref_info = STRBUF_INIT;
1211 struct strbuf session_id = STRBUF_INIT;
1212
1213 format_symref_info(&symref_info, &data->symref);
1214 format_session_id(&session_id, data);
1215 packet_fwrite_fmt(stdout, "%s %s%c%s%s%s%s%s%s%s object-format=%s agent=%s\n",
1216 oid_to_hex(oid), refname_nons,
1217 0, capabilities,
1218 (data->allow_uor & ALLOW_TIP_SHA1) ?
1219 " allow-tip-sha1-in-want" : "",
1220 (data->allow_uor & ALLOW_REACHABLE_SHA1) ?
1221 " allow-reachable-sha1-in-want" : "",
1222 data->no_done ? " no-done" : "",
1223 symref_info.buf,
1224 data->allow_filter ? " filter" : "",
1225 session_id.buf,
1226 the_hash_algo->name,
1227 git_user_agent_sanitized());
1228 strbuf_release(&symref_info);
1229 strbuf_release(&session_id);
1230 } else {
1231 packet_fwrite_fmt(stdout, "%s %s\n", oid_to_hex(oid), refname_nons);
1232 }
1233 capabilities = NULL;
1234 if (!peel_iterated_oid(oid, &peeled))
1235 packet_fwrite_fmt(stdout, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
1236 return 0;
1237 }
1238
1239 static int find_symref(const char *refname, const struct object_id *oid,
1240 int flag, void *cb_data)
1241 {
1242 const char *symref_target;
1243 struct string_list_item *item;
1244
1245 if ((flag & REF_ISSYMREF) == 0)
1246 return 0;
1247 symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
1248 if (!symref_target || (flag & REF_ISSYMREF) == 0)
1249 die("'%s' is a symref but it is not?", refname);
1250 item = string_list_append(cb_data, strip_namespace(refname));
1251 item->util = xstrdup(strip_namespace(symref_target));
1252 return 0;
1253 }
1254
1255 static int parse_object_filter_config(const char *var, const char *value,
1256 struct upload_pack_data *data)
1257 {
1258 struct strbuf buf = STRBUF_INIT;
1259 const char *sub, *key;
1260 size_t sub_len;
1261
1262 if (parse_config_key(var, "uploadpackfilter", &sub, &sub_len, &key))
1263 return 0;
1264
1265 if (!sub) {
1266 if (!strcmp(key, "allow"))
1267 data->allow_filter_fallback = git_config_bool(var, value);
1268 return 0;
1269 }
1270
1271 strbuf_add(&buf, sub, sub_len);
1272
1273 if (!strcmp(key, "allow"))
1274 string_list_insert(&data->allowed_filters, buf.buf)->util =
1275 (void *)(intptr_t)git_config_bool(var, value);
1276 else if (!strcmp(buf.buf, "tree") && !strcmp(key, "maxdepth")) {
1277 if (!value) {
1278 strbuf_release(&buf);
1279 return config_error_nonbool(var);
1280 }
1281 string_list_insert(&data->allowed_filters, buf.buf)->util =
1282 (void *)(intptr_t)1;
1283 data->tree_filter_max_depth = git_config_ulong(var, value);
1284 }
1285
1286 strbuf_release(&buf);
1287 return 0;
1288 }
1289
1290 static int upload_pack_config(const char *var, const char *value, void *cb_data)
1291 {
1292 struct upload_pack_data *data = cb_data;
1293
1294 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1295 if (git_config_bool(var, value))
1296 data->allow_uor |= ALLOW_TIP_SHA1;
1297 else
1298 data->allow_uor &= ~ALLOW_TIP_SHA1;
1299 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1300 if (git_config_bool(var, value))
1301 data->allow_uor |= ALLOW_REACHABLE_SHA1;
1302 else
1303 data->allow_uor &= ~ALLOW_REACHABLE_SHA1;
1304 } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1305 if (git_config_bool(var, value))
1306 data->allow_uor |= ALLOW_ANY_SHA1;
1307 else
1308 data->allow_uor &= ~ALLOW_ANY_SHA1;
1309 } else if (!strcmp("uploadpack.keepalive", var)) {
1310 data->keepalive = git_config_int(var, value);
1311 if (!data->keepalive)
1312 data->keepalive = -1;
1313 } else if (!strcmp("uploadpack.allowfilter", var)) {
1314 data->allow_filter = git_config_bool(var, value);
1315 } else if (!strcmp("uploadpack.allowrefinwant", var)) {
1316 data->allow_ref_in_want = git_config_bool(var, value);
1317 } else if (!strcmp("uploadpack.allowsidebandall", var)) {
1318 data->allow_sideband_all = git_config_bool(var, value);
1319 } else if (!strcmp("core.precomposeunicode", var)) {
1320 precomposed_unicode = git_config_bool(var, value);
1321 } else if (!strcmp("transfer.advertisesid", var)) {
1322 data->advertise_sid = git_config_bool(var, value);
1323 }
1324
1325 if (current_config_scope() != CONFIG_SCOPE_LOCAL &&
1326 current_config_scope() != CONFIG_SCOPE_WORKTREE) {
1327 if (!strcmp("uploadpack.packobjectshook", var))
1328 return git_config_string(&data->pack_objects_hook, var, value);
1329 }
1330
1331 if (parse_object_filter_config(var, value, data) < 0)
1332 return -1;
1333
1334 return parse_hide_refs_config(var, value, "uploadpack");
1335 }
1336
1337 void upload_pack(const int advertise_refs, const int stateless_rpc,
1338 const int timeout)
1339 {
1340 struct packet_reader reader;
1341 struct upload_pack_data data;
1342
1343 upload_pack_data_init(&data);
1344
1345 git_config(upload_pack_config, &data);
1346
1347 data.stateless_rpc = stateless_rpc;
1348 data.timeout = timeout;
1349 if (data.timeout)
1350 data.daemon_mode = 1;
1351
1352 head_ref_namespaced(find_symref, &data.symref);
1353
1354 if (advertise_refs || !data.stateless_rpc) {
1355 reset_timeout(data.timeout);
1356 if (advertise_refs)
1357 data.no_done = 1;
1358 head_ref_namespaced(send_ref, &data);
1359 for_each_namespaced_ref(send_ref, &data);
1360 /*
1361 * fflush stdout before calling advertise_shallow_grafts because send_ref
1362 * uses stdio.
1363 */
1364 fflush_or_die(stdout);
1365 advertise_shallow_grafts(1);
1366 packet_flush(1);
1367 } else {
1368 head_ref_namespaced(check_ref, NULL);
1369 for_each_namespaced_ref(check_ref, NULL);
1370 }
1371
1372 if (!advertise_refs) {
1373 packet_reader_init(&reader, 0, NULL, 0,
1374 PACKET_READ_CHOMP_NEWLINE |
1375 PACKET_READ_DIE_ON_ERR_PACKET);
1376
1377 receive_needs(&data, &reader);
1378
1379 /*
1380 * An EOF at this exact point in negotiation should be
1381 * acceptable from stateless clients as they will consume the
1382 * shallow list before doing subsequent rpc with haves/etc.
1383 */
1384 if (data.stateless_rpc)
1385 reader.options |= PACKET_READ_GENTLE_ON_EOF;
1386
1387 if (data.want_obj.nr &&
1388 packet_reader_peek(&reader) != PACKET_READ_EOF) {
1389 reader.options &= ~PACKET_READ_GENTLE_ON_EOF;
1390 get_common_commits(&data, &reader);
1391 create_pack_file(&data, NULL);
1392 }
1393 }
1394
1395 upload_pack_data_clear(&data);
1396 }
1397
1398 static int parse_want(struct packet_writer *writer, const char *line,
1399 struct object_array *want_obj)
1400 {
1401 const char *arg;
1402 if (skip_prefix(line, "want ", &arg)) {
1403 struct object_id oid;
1404 struct commit *commit;
1405 struct object *o;
1406
1407 if (get_oid_hex(arg, &oid))
1408 die("git upload-pack: protocol error, "
1409 "expected to get oid, not '%s'", line);
1410
1411 commit = lookup_commit_in_graph(the_repository, &oid);
1412 if (commit)
1413 o = &commit->object;
1414 else
1415 o = parse_object(the_repository, &oid);
1416
1417 if (!o) {
1418 packet_writer_error(writer,
1419 "upload-pack: not our ref %s",
1420 oid_to_hex(&oid));
1421 die("git upload-pack: not our ref %s",
1422 oid_to_hex(&oid));
1423 }
1424
1425 if (!(o->flags & WANTED)) {
1426 o->flags |= WANTED;
1427 add_object_array(o, NULL, want_obj);
1428 }
1429
1430 return 1;
1431 }
1432
1433 return 0;
1434 }
1435
1436 static int parse_want_ref(struct packet_writer *writer, const char *line,
1437 struct string_list *wanted_refs,
1438 struct object_array *want_obj)
1439 {
1440 const char *refname_nons;
1441 if (skip_prefix(line, "want-ref ", &refname_nons)) {
1442 struct object_id oid;
1443 struct string_list_item *item;
1444 struct object *o = NULL;
1445 struct strbuf refname = STRBUF_INIT;
1446
1447 strbuf_addf(&refname, "%s%s", get_git_namespace(), refname_nons);
1448 if (ref_is_hidden(refname_nons, refname.buf) ||
1449 read_ref(refname.buf, &oid)) {
1450 packet_writer_error(writer, "unknown ref %s", refname_nons);
1451 die("unknown ref %s", refname_nons);
1452 }
1453 strbuf_release(&refname);
1454
1455 item = string_list_append(wanted_refs, refname_nons);
1456 item->util = oiddup(&oid);
1457
1458 if (!starts_with(refname_nons, "refs/tags/")) {
1459 struct commit *commit = lookup_commit_in_graph(the_repository, &oid);
1460 if (commit)
1461 o = &commit->object;
1462 }
1463
1464 if (!o)
1465 o = parse_object_or_die(&oid, refname_nons);
1466
1467 if (!(o->flags & WANTED)) {
1468 o->flags |= WANTED;
1469 add_object_array(o, NULL, want_obj);
1470 }
1471
1472 return 1;
1473 }
1474
1475 return 0;
1476 }
1477
1478 static int parse_have(const char *line, struct oid_array *haves)
1479 {
1480 const char *arg;
1481 if (skip_prefix(line, "have ", &arg)) {
1482 struct object_id oid;
1483
1484 if (get_oid_hex(arg, &oid))
1485 die("git upload-pack: expected SHA1 object, got '%s'", arg);
1486 oid_array_append(haves, &oid);
1487 return 1;
1488 }
1489
1490 return 0;
1491 }
1492
1493 static void process_args(struct packet_reader *request,
1494 struct upload_pack_data *data)
1495 {
1496 while (packet_reader_read(request) == PACKET_READ_NORMAL) {
1497 const char *arg = request->line;
1498 const char *p;
1499
1500 /* process want */
1501 if (parse_want(&data->writer, arg, &data->want_obj))
1502 continue;
1503 if (data->allow_ref_in_want &&
1504 parse_want_ref(&data->writer, arg, &data->wanted_refs,
1505 &data->want_obj))
1506 continue;
1507 /* process have line */
1508 if (parse_have(arg, &data->haves))
1509 continue;
1510
1511 /* process args like thin-pack */
1512 if (!strcmp(arg, "thin-pack")) {
1513 data->use_thin_pack = 1;
1514 continue;
1515 }
1516 if (!strcmp(arg, "ofs-delta")) {
1517 data->use_ofs_delta = 1;
1518 continue;
1519 }
1520 if (!strcmp(arg, "no-progress")) {
1521 data->no_progress = 1;
1522 continue;
1523 }
1524 if (!strcmp(arg, "include-tag")) {
1525 data->use_include_tag = 1;
1526 continue;
1527 }
1528 if (!strcmp(arg, "done")) {
1529 data->done = 1;
1530 continue;
1531 }
1532 if (!strcmp(arg, "wait-for-done")) {
1533 data->wait_for_done = 1;
1534 continue;
1535 }
1536
1537 /* Shallow related arguments */
1538 if (process_shallow(arg, &data->shallows))
1539 continue;
1540 if (process_deepen(arg, &data->depth))
1541 continue;
1542 if (process_deepen_since(arg, &data->deepen_since,
1543 &data->deepen_rev_list))
1544 continue;
1545 if (process_deepen_not(arg, &data->deepen_not,
1546 &data->deepen_rev_list))
1547 continue;
1548 if (!strcmp(arg, "deepen-relative")) {
1549 data->deepen_relative = 1;
1550 continue;
1551 }
1552
1553 if (data->allow_filter && skip_prefix(arg, "filter ", &p)) {
1554 list_objects_filter_die_if_populated(&data->filter_options);
1555 parse_list_objects_filter(&data->filter_options, p);
1556 die_if_using_banned_filter(data);
1557 continue;
1558 }
1559
1560 if ((git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1561 data->allow_sideband_all) &&
1562 !strcmp(arg, "sideband-all")) {
1563 data->writer.use_sideband = 1;
1564 continue;
1565 }
1566
1567 if (skip_prefix(arg, "packfile-uris ", &p)) {
1568 string_list_split(&data->uri_protocols, p, ',', -1);
1569 continue;
1570 }
1571
1572 /* ignore unknown lines maybe? */
1573 die("unexpected line: '%s'", arg);
1574 }
1575
1576 if (data->uri_protocols.nr && !data->writer.use_sideband)
1577 string_list_clear(&data->uri_protocols, 0);
1578
1579 if (request->status != PACKET_READ_FLUSH)
1580 die(_("expected flush after fetch arguments"));
1581 }
1582
1583 static int process_haves(struct upload_pack_data *data, struct oid_array *common)
1584 {
1585 int i;
1586
1587 /* Process haves */
1588 for (i = 0; i < data->haves.nr; i++) {
1589 const struct object_id *oid = &data->haves.oid[i];
1590
1591 if (!has_object_file_with_flags(oid,
1592 OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT))
1593 continue;
1594
1595 oid_array_append(common, oid);
1596
1597 do_got_oid(data, oid);
1598 }
1599
1600 return 0;
1601 }
1602
1603 static int send_acks(struct upload_pack_data *data, struct oid_array *acks)
1604 {
1605 int i;
1606
1607 packet_writer_write(&data->writer, "acknowledgments\n");
1608
1609 /* Send Acks */
1610 if (!acks->nr)
1611 packet_writer_write(&data->writer, "NAK\n");
1612
1613 for (i = 0; i < acks->nr; i++) {
1614 packet_writer_write(&data->writer, "ACK %s\n",
1615 oid_to_hex(&acks->oid[i]));
1616 }
1617
1618 if (!data->wait_for_done && ok_to_give_up(data)) {
1619 /* Send Ready */
1620 packet_writer_write(&data->writer, "ready\n");
1621 return 1;
1622 }
1623
1624 return 0;
1625 }
1626
1627 static int process_haves_and_send_acks(struct upload_pack_data *data)
1628 {
1629 struct oid_array common = OID_ARRAY_INIT;
1630 int ret = 0;
1631
1632 process_haves(data, &common);
1633 if (data->done) {
1634 ret = 1;
1635 } else if (send_acks(data, &common)) {
1636 packet_writer_delim(&data->writer);
1637 ret = 1;
1638 } else {
1639 /* Add Flush */
1640 packet_writer_flush(&data->writer);
1641 ret = 0;
1642 }
1643
1644 oid_array_clear(&data->haves);
1645 oid_array_clear(&common);
1646 return ret;
1647 }
1648
1649 static void send_wanted_ref_info(struct upload_pack_data *data)
1650 {
1651 const struct string_list_item *item;
1652
1653 if (!data->wanted_refs.nr)
1654 return;
1655
1656 packet_writer_write(&data->writer, "wanted-refs\n");
1657
1658 for_each_string_list_item(item, &data->wanted_refs) {
1659 packet_writer_write(&data->writer, "%s %s\n",
1660 oid_to_hex(item->util),
1661 item->string);
1662 }
1663
1664 packet_writer_delim(&data->writer);
1665 }
1666
1667 static void send_shallow_info(struct upload_pack_data *data)
1668 {
1669 /* No shallow info needs to be sent */
1670 if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1671 !is_repository_shallow(the_repository))
1672 return;
1673
1674 packet_writer_write(&data->writer, "shallow-info\n");
1675
1676 if (!send_shallow_list(data) &&
1677 is_repository_shallow(the_repository))
1678 deepen(data, INFINITE_DEPTH);
1679
1680 packet_delim(1);
1681 }
1682
1683 enum fetch_state {
1684 FETCH_PROCESS_ARGS = 0,
1685 FETCH_SEND_ACKS,
1686 FETCH_SEND_PACK,
1687 FETCH_DONE,
1688 };
1689
1690 int upload_pack_v2(struct repository *r, struct packet_reader *request)
1691 {
1692 enum fetch_state state = FETCH_PROCESS_ARGS;
1693 struct upload_pack_data data;
1694
1695 clear_object_flags(ALL_FLAGS);
1696
1697 upload_pack_data_init(&data);
1698 data.use_sideband = LARGE_PACKET_MAX;
1699
1700 git_config(upload_pack_config, &data);
1701
1702 while (state != FETCH_DONE) {
1703 switch (state) {
1704 case FETCH_PROCESS_ARGS:
1705 process_args(request, &data);
1706
1707 if (!data.want_obj.nr && !data.wait_for_done) {
1708 /*
1709 * Request didn't contain any 'want' lines (and
1710 * the request does not contain
1711 * "wait-for-done", in which it is reasonable
1712 * to just send 'have's without 'want's); guess
1713 * they didn't want anything.
1714 */
1715 state = FETCH_DONE;
1716 } else if (data.haves.nr) {
1717 /*
1718 * Request had 'have' lines, so lets ACK them.
1719 */
1720 state = FETCH_SEND_ACKS;
1721 } else {
1722 /*
1723 * Request had 'want's but no 'have's so we can
1724 * immedietly go to construct and send a pack.
1725 */
1726 state = FETCH_SEND_PACK;
1727 }
1728 break;
1729 case FETCH_SEND_ACKS:
1730 if (process_haves_and_send_acks(&data))
1731 state = FETCH_SEND_PACK;
1732 else
1733 state = FETCH_DONE;
1734 break;
1735 case FETCH_SEND_PACK:
1736 send_wanted_ref_info(&data);
1737 send_shallow_info(&data);
1738
1739 if (data.uri_protocols.nr) {
1740 create_pack_file(&data, &data.uri_protocols);
1741 } else {
1742 packet_writer_write(&data.writer, "packfile\n");
1743 create_pack_file(&data, NULL);
1744 }
1745 state = FETCH_DONE;
1746 break;
1747 case FETCH_DONE:
1748 continue;
1749 }
1750 }
1751
1752 upload_pack_data_clear(&data);
1753 return 0;
1754 }
1755
1756 int upload_pack_advertise(struct repository *r,
1757 struct strbuf *value)
1758 {
1759 if (value) {
1760 int allow_filter_value;
1761 int allow_ref_in_want;
1762 int allow_sideband_all_value;
1763 char *str = NULL;
1764
1765 strbuf_addstr(value, "shallow wait-for-done");
1766
1767 if (!repo_config_get_bool(the_repository,
1768 "uploadpack.allowfilter",
1769 &allow_filter_value) &&
1770 allow_filter_value)
1771 strbuf_addstr(value, " filter");
1772
1773 if (!repo_config_get_bool(the_repository,
1774 "uploadpack.allowrefinwant",
1775 &allow_ref_in_want) &&
1776 allow_ref_in_want)
1777 strbuf_addstr(value, " ref-in-want");
1778
1779 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1780 (!repo_config_get_bool(the_repository,
1781 "uploadpack.allowsidebandall",
1782 &allow_sideband_all_value) &&
1783 allow_sideband_all_value))
1784 strbuf_addstr(value, " sideband-all");
1785
1786 if (!repo_config_get_string(the_repository,
1787 "uploadpack.blobpackfileuri",
1788 &str) &&
1789 str) {
1790 strbuf_addstr(value, " packfile-uris");
1791 free(str);
1792 }
1793 }
1794
1795 return 1;
1796 }
Unnamed repository; edit this file 'description' to name the repository.