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1 | #include "cache.h" | |
2 | #include "config.h" | |
3 | #include "refs.h" | |
4 | #include "pkt-line.h" | |
5 | #include "sideband.h" | |
6 | #include "repository.h" | |
7 | #include "object-store.h" | |
8 | #include "tag.h" | |
9 | #include "object.h" | |
10 | #include "commit.h" | |
11 | #include "diff.h" | |
12 | #include "revision.h" | |
13 | #include "list-objects.h" | |
14 | #include "list-objects-filter.h" | |
15 | #include "list-objects-filter-options.h" | |
16 | #include "run-command.h" | |
17 | #include "connect.h" | |
18 | #include "sigchain.h" | |
19 | #include "version.h" | |
20 | #include "string-list.h" | |
21 | #include "argv-array.h" | |
22 | #include "prio-queue.h" | |
23 | #include "protocol.h" | |
24 | #include "quote.h" | |
25 | #include "upload-pack.h" | |
26 | #include "serve.h" | |
27 | #include "commit-graph.h" | |
28 | #include "commit-reach.h" | |
29 | ||
30 | /* Remember to update object flag allocation in object.h */ | |
31 | #define THEY_HAVE (1u << 11) | |
32 | #define OUR_REF (1u << 12) | |
33 | #define WANTED (1u << 13) | |
34 | #define COMMON_KNOWN (1u << 14) | |
35 | ||
36 | #define SHALLOW (1u << 16) | |
37 | #define NOT_SHALLOW (1u << 17) | |
38 | #define CLIENT_SHALLOW (1u << 18) | |
39 | #define HIDDEN_REF (1u << 19) | |
40 | ||
41 | #define ALL_FLAGS (THEY_HAVE | OUR_REF | WANTED | COMMON_KNOWN | SHALLOW | \ | |
42 | NOT_SHALLOW | CLIENT_SHALLOW | HIDDEN_REF) | |
43 | ||
44 | static timestamp_t oldest_have; | |
45 | ||
46 | static int multi_ack; | |
47 | static int no_done; | |
48 | static int use_thin_pack, use_ofs_delta, use_include_tag; | |
49 | static int no_progress, daemon_mode; | |
50 | /* Allow specifying sha1 if it is a ref tip. */ | |
51 | #define ALLOW_TIP_SHA1 01 | |
52 | /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */ | |
53 | #define ALLOW_REACHABLE_SHA1 02 | |
54 | /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */ | |
55 | #define ALLOW_ANY_SHA1 07 | |
56 | static unsigned int allow_unadvertised_object_request; | |
57 | static int shallow_nr; | |
58 | static struct object_array extra_edge_obj; | |
59 | static unsigned int timeout; | |
60 | static int keepalive = 5; | |
61 | /* 0 for no sideband, | |
62 | * otherwise maximum packet size (up to 65520 bytes). | |
63 | */ | |
64 | static int use_sideband; | |
65 | static int stateless_rpc; | |
66 | static const char *pack_objects_hook; | |
67 | ||
68 | static int filter_capability_requested; | |
69 | static int allow_filter; | |
70 | static int allow_ref_in_want; | |
71 | static struct list_objects_filter_options filter_options; | |
72 | ||
73 | static int allow_sideband_all; | |
74 | ||
75 | static void reset_timeout(void) | |
76 | { | |
77 | alarm(timeout); | |
78 | } | |
79 | ||
80 | static void send_client_data(int fd, const char *data, ssize_t sz) | |
81 | { | |
82 | if (use_sideband) { | |
83 | send_sideband(1, fd, data, sz, use_sideband); | |
84 | return; | |
85 | } | |
86 | if (fd == 3) | |
87 | /* emergency quit */ | |
88 | fd = 2; | |
89 | if (fd == 2) { | |
90 | /* XXX: are we happy to lose stuff here? */ | |
91 | xwrite(fd, data, sz); | |
92 | return; | |
93 | } | |
94 | write_or_die(fd, data, sz); | |
95 | } | |
96 | ||
97 | static int write_one_shallow(const struct commit_graft *graft, void *cb_data) | |
98 | { | |
99 | FILE *fp = cb_data; | |
100 | if (graft->nr_parent == -1) | |
101 | fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid)); | |
102 | return 0; | |
103 | } | |
104 | ||
105 | static void create_pack_file(const struct object_array *have_obj, | |
106 | const struct object_array *want_obj) | |
107 | { | |
108 | struct child_process pack_objects = CHILD_PROCESS_INIT; | |
109 | char data[8193], progress[128]; | |
110 | char abort_msg[] = "aborting due to possible repository " | |
111 | "corruption on the remote side."; | |
112 | int buffered = -1; | |
113 | ssize_t sz; | |
114 | int i; | |
115 | FILE *pipe_fd; | |
116 | ||
117 | if (!pack_objects_hook) | |
118 | pack_objects.git_cmd = 1; | |
119 | else { | |
120 | argv_array_push(&pack_objects.args, pack_objects_hook); | |
121 | argv_array_push(&pack_objects.args, "git"); | |
122 | pack_objects.use_shell = 1; | |
123 | } | |
124 | ||
125 | if (shallow_nr) { | |
126 | argv_array_push(&pack_objects.args, "--shallow-file"); | |
127 | argv_array_push(&pack_objects.args, ""); | |
128 | } | |
129 | argv_array_push(&pack_objects.args, "pack-objects"); | |
130 | argv_array_push(&pack_objects.args, "--revs"); | |
131 | if (use_thin_pack) | |
132 | argv_array_push(&pack_objects.args, "--thin"); | |
133 | ||
134 | argv_array_push(&pack_objects.args, "--stdout"); | |
135 | if (shallow_nr) | |
136 | argv_array_push(&pack_objects.args, "--shallow"); | |
137 | if (!no_progress) | |
138 | argv_array_push(&pack_objects.args, "--progress"); | |
139 | if (use_ofs_delta) | |
140 | argv_array_push(&pack_objects.args, "--delta-base-offset"); | |
141 | if (use_include_tag) | |
142 | argv_array_push(&pack_objects.args, "--include-tag"); | |
143 | if (filter_options.filter_spec) { | |
144 | struct strbuf expanded_filter_spec = STRBUF_INIT; | |
145 | expand_list_objects_filter_spec(&filter_options, | |
146 | &expanded_filter_spec); | |
147 | if (pack_objects.use_shell) { | |
148 | struct strbuf buf = STRBUF_INIT; | |
149 | sq_quote_buf(&buf, expanded_filter_spec.buf); | |
150 | argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf); | |
151 | strbuf_release(&buf); | |
152 | } else { | |
153 | argv_array_pushf(&pack_objects.args, "--filter=%s", | |
154 | expanded_filter_spec.buf); | |
155 | } | |
156 | } | |
157 | ||
158 | pack_objects.in = -1; | |
159 | pack_objects.out = -1; | |
160 | pack_objects.err = -1; | |
161 | ||
162 | if (start_command(&pack_objects)) | |
163 | die("git upload-pack: unable to fork git-pack-objects"); | |
164 | ||
165 | pipe_fd = xfdopen(pack_objects.in, "w"); | |
166 | ||
167 | if (shallow_nr) | |
168 | for_each_commit_graft(write_one_shallow, pipe_fd); | |
169 | ||
170 | for (i = 0; i < want_obj->nr; i++) | |
171 | fprintf(pipe_fd, "%s\n", | |
172 | oid_to_hex(&want_obj->objects[i].item->oid)); | |
173 | fprintf(pipe_fd, "--not\n"); | |
174 | for (i = 0; i < have_obj->nr; i++) | |
175 | fprintf(pipe_fd, "%s\n", | |
176 | oid_to_hex(&have_obj->objects[i].item->oid)); | |
177 | for (i = 0; i < extra_edge_obj.nr; i++) | |
178 | fprintf(pipe_fd, "%s\n", | |
179 | oid_to_hex(&extra_edge_obj.objects[i].item->oid)); | |
180 | fprintf(pipe_fd, "\n"); | |
181 | fflush(pipe_fd); | |
182 | fclose(pipe_fd); | |
183 | ||
184 | /* We read from pack_objects.err to capture stderr output for | |
185 | * progress bar, and pack_objects.out to capture the pack data. | |
186 | */ | |
187 | ||
188 | while (1) { | |
189 | struct pollfd pfd[2]; | |
190 | int pe, pu, pollsize; | |
191 | int ret; | |
192 | ||
193 | reset_timeout(); | |
194 | ||
195 | pollsize = 0; | |
196 | pe = pu = -1; | |
197 | ||
198 | if (0 <= pack_objects.out) { | |
199 | pfd[pollsize].fd = pack_objects.out; | |
200 | pfd[pollsize].events = POLLIN; | |
201 | pu = pollsize; | |
202 | pollsize++; | |
203 | } | |
204 | if (0 <= pack_objects.err) { | |
205 | pfd[pollsize].fd = pack_objects.err; | |
206 | pfd[pollsize].events = POLLIN; | |
207 | pe = pollsize; | |
208 | pollsize++; | |
209 | } | |
210 | ||
211 | if (!pollsize) | |
212 | break; | |
213 | ||
214 | ret = poll(pfd, pollsize, | |
215 | keepalive < 0 ? -1 : 1000 * keepalive); | |
216 | ||
217 | if (ret < 0) { | |
218 | if (errno != EINTR) { | |
219 | error_errno("poll failed, resuming"); | |
220 | sleep(1); | |
221 | } | |
222 | continue; | |
223 | } | |
224 | if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) { | |
225 | /* Status ready; we ship that in the side-band | |
226 | * or dump to the standard error. | |
227 | */ | |
228 | sz = xread(pack_objects.err, progress, | |
229 | sizeof(progress)); | |
230 | if (0 < sz) | |
231 | send_client_data(2, progress, sz); | |
232 | else if (sz == 0) { | |
233 | close(pack_objects.err); | |
234 | pack_objects.err = -1; | |
235 | } | |
236 | else | |
237 | goto fail; | |
238 | /* give priority to status messages */ | |
239 | continue; | |
240 | } | |
241 | if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) { | |
242 | /* Data ready; we keep the last byte to ourselves | |
243 | * in case we detect broken rev-list, so that we | |
244 | * can leave the stream corrupted. This is | |
245 | * unfortunate -- unpack-objects would happily | |
246 | * accept a valid packdata with trailing garbage, | |
247 | * so appending garbage after we pass all the | |
248 | * pack data is not good enough to signal | |
249 | * breakage to downstream. | |
250 | */ | |
251 | char *cp = data; | |
252 | ssize_t outsz = 0; | |
253 | if (0 <= buffered) { | |
254 | *cp++ = buffered; | |
255 | outsz++; | |
256 | } | |
257 | sz = xread(pack_objects.out, cp, | |
258 | sizeof(data) - outsz); | |
259 | if (0 < sz) | |
260 | ; | |
261 | else if (sz == 0) { | |
262 | close(pack_objects.out); | |
263 | pack_objects.out = -1; | |
264 | } | |
265 | else | |
266 | goto fail; | |
267 | sz += outsz; | |
268 | if (1 < sz) { | |
269 | buffered = data[sz-1] & 0xFF; | |
270 | sz--; | |
271 | } | |
272 | else | |
273 | buffered = -1; | |
274 | send_client_data(1, data, sz); | |
275 | } | |
276 | ||
277 | /* | |
278 | * We hit the keepalive timeout without saying anything; send | |
279 | * an empty message on the data sideband just to let the other | |
280 | * side know we're still working on it, but don't have any data | |
281 | * yet. | |
282 | * | |
283 | * If we don't have a sideband channel, there's no room in the | |
284 | * protocol to say anything, so those clients are just out of | |
285 | * luck. | |
286 | */ | |
287 | if (!ret && use_sideband) { | |
288 | static const char buf[] = "0005\1"; | |
289 | write_or_die(1, buf, 5); | |
290 | } | |
291 | } | |
292 | ||
293 | if (finish_command(&pack_objects)) { | |
294 | error("git upload-pack: git-pack-objects died with error."); | |
295 | goto fail; | |
296 | } | |
297 | ||
298 | /* flush the data */ | |
299 | if (0 <= buffered) { | |
300 | data[0] = buffered; | |
301 | send_client_data(1, data, 1); | |
302 | fprintf(stderr, "flushed.\n"); | |
303 | } | |
304 | if (use_sideband) | |
305 | packet_flush(1); | |
306 | return; | |
307 | ||
308 | fail: | |
309 | send_client_data(3, abort_msg, sizeof(abort_msg)); | |
310 | die("git upload-pack: %s", abort_msg); | |
311 | } | |
312 | ||
313 | static int got_oid(const char *hex, struct object_id *oid, | |
314 | struct object_array *have_obj) | |
315 | { | |
316 | struct object *o; | |
317 | int we_knew_they_have = 0; | |
318 | ||
319 | if (get_oid_hex(hex, oid)) | |
320 | die("git upload-pack: expected SHA1 object, got '%s'", hex); | |
321 | if (!has_object_file(oid)) | |
322 | return -1; | |
323 | ||
324 | o = parse_object(the_repository, oid); | |
325 | if (!o) | |
326 | die("oops (%s)", oid_to_hex(oid)); | |
327 | if (o->type == OBJ_COMMIT) { | |
328 | struct commit_list *parents; | |
329 | struct commit *commit = (struct commit *)o; | |
330 | if (o->flags & THEY_HAVE) | |
331 | we_knew_they_have = 1; | |
332 | else | |
333 | o->flags |= THEY_HAVE; | |
334 | if (!oldest_have || (commit->date < oldest_have)) | |
335 | oldest_have = commit->date; | |
336 | for (parents = commit->parents; | |
337 | parents; | |
338 | parents = parents->next) | |
339 | parents->item->object.flags |= THEY_HAVE; | |
340 | } | |
341 | if (!we_knew_they_have) { | |
342 | add_object_array(o, NULL, have_obj); | |
343 | return 1; | |
344 | } | |
345 | return 0; | |
346 | } | |
347 | ||
348 | static int ok_to_give_up(const struct object_array *have_obj, | |
349 | struct object_array *want_obj) | |
350 | { | |
351 | uint32_t min_generation = GENERATION_NUMBER_ZERO; | |
352 | ||
353 | if (!have_obj->nr) | |
354 | return 0; | |
355 | ||
356 | return can_all_from_reach_with_flag(want_obj, THEY_HAVE, | |
357 | COMMON_KNOWN, oldest_have, | |
358 | min_generation); | |
359 | } | |
360 | ||
361 | static int get_common_commits(struct packet_reader *reader, | |
362 | struct object_array *have_obj, | |
363 | struct object_array *want_obj) | |
364 | { | |
365 | struct object_id oid; | |
366 | char last_hex[GIT_MAX_HEXSZ + 1]; | |
367 | int got_common = 0; | |
368 | int got_other = 0; | |
369 | int sent_ready = 0; | |
370 | ||
371 | save_commit_buffer = 0; | |
372 | ||
373 | for (;;) { | |
374 | const char *arg; | |
375 | ||
376 | reset_timeout(); | |
377 | ||
378 | if (packet_reader_read(reader) != PACKET_READ_NORMAL) { | |
379 | if (multi_ack == 2 && got_common | |
380 | && !got_other && ok_to_give_up(have_obj, want_obj)) { | |
381 | sent_ready = 1; | |
382 | packet_write_fmt(1, "ACK %s ready\n", last_hex); | |
383 | } | |
384 | if (have_obj->nr == 0 || multi_ack) | |
385 | packet_write_fmt(1, "NAK\n"); | |
386 | ||
387 | if (no_done && sent_ready) { | |
388 | packet_write_fmt(1, "ACK %s\n", last_hex); | |
389 | return 0; | |
390 | } | |
391 | if (stateless_rpc) | |
392 | exit(0); | |
393 | got_common = 0; | |
394 | got_other = 0; | |
395 | continue; | |
396 | } | |
397 | if (skip_prefix(reader->line, "have ", &arg)) { | |
398 | switch (got_oid(arg, &oid, have_obj)) { | |
399 | case -1: /* they have what we do not */ | |
400 | got_other = 1; | |
401 | if (multi_ack && ok_to_give_up(have_obj, want_obj)) { | |
402 | const char *hex = oid_to_hex(&oid); | |
403 | if (multi_ack == 2) { | |
404 | sent_ready = 1; | |
405 | packet_write_fmt(1, "ACK %s ready\n", hex); | |
406 | } else | |
407 | packet_write_fmt(1, "ACK %s continue\n", hex); | |
408 | } | |
409 | break; | |
410 | default: | |
411 | got_common = 1; | |
412 | oid_to_hex_r(last_hex, &oid); | |
413 | if (multi_ack == 2) | |
414 | packet_write_fmt(1, "ACK %s common\n", last_hex); | |
415 | else if (multi_ack) | |
416 | packet_write_fmt(1, "ACK %s continue\n", last_hex); | |
417 | else if (have_obj->nr == 1) | |
418 | packet_write_fmt(1, "ACK %s\n", last_hex); | |
419 | break; | |
420 | } | |
421 | continue; | |
422 | } | |
423 | if (!strcmp(reader->line, "done")) { | |
424 | if (have_obj->nr > 0) { | |
425 | if (multi_ack) | |
426 | packet_write_fmt(1, "ACK %s\n", last_hex); | |
427 | return 0; | |
428 | } | |
429 | packet_write_fmt(1, "NAK\n"); | |
430 | return -1; | |
431 | } | |
432 | die("git upload-pack: expected SHA1 list, got '%s'", reader->line); | |
433 | } | |
434 | } | |
435 | ||
436 | static int is_our_ref(struct object *o) | |
437 | { | |
438 | int allow_hidden_ref = (allow_unadvertised_object_request & | |
439 | (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1)); | |
440 | return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF); | |
441 | } | |
442 | ||
443 | /* | |
444 | * on successful case, it's up to the caller to close cmd->out | |
445 | */ | |
446 | static int do_reachable_revlist(struct child_process *cmd, | |
447 | struct object_array *src, | |
448 | struct object_array *reachable) | |
449 | { | |
450 | static const char *argv[] = { | |
451 | "rev-list", "--stdin", NULL, | |
452 | }; | |
453 | struct object *o; | |
454 | char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */ | |
455 | int i; | |
456 | const unsigned hexsz = the_hash_algo->hexsz; | |
457 | ||
458 | cmd->argv = argv; | |
459 | cmd->git_cmd = 1; | |
460 | cmd->no_stderr = 1; | |
461 | cmd->in = -1; | |
462 | cmd->out = -1; | |
463 | ||
464 | /* | |
465 | * If the next rev-list --stdin encounters an unknown commit, | |
466 | * it terminates, which will cause SIGPIPE in the write loop | |
467 | * below. | |
468 | */ | |
469 | sigchain_push(SIGPIPE, SIG_IGN); | |
470 | ||
471 | if (start_command(cmd)) | |
472 | goto error; | |
473 | ||
474 | namebuf[0] = '^'; | |
475 | namebuf[hexsz + 1] = '\n'; | |
476 | for (i = get_max_object_index(); 0 < i; ) { | |
477 | o = get_indexed_object(--i); | |
478 | if (!o) | |
479 | continue; | |
480 | if (reachable && o->type == OBJ_COMMIT) | |
481 | o->flags &= ~TMP_MARK; | |
482 | if (!is_our_ref(o)) | |
483 | continue; | |
484 | memcpy(namebuf + 1, oid_to_hex(&o->oid), hexsz); | |
485 | if (write_in_full(cmd->in, namebuf, hexsz + 2) < 0) | |
486 | goto error; | |
487 | } | |
488 | namebuf[hexsz] = '\n'; | |
489 | for (i = 0; i < src->nr; i++) { | |
490 | o = src->objects[i].item; | |
491 | if (is_our_ref(o)) { | |
492 | if (reachable) | |
493 | add_object_array(o, NULL, reachable); | |
494 | continue; | |
495 | } | |
496 | if (reachable && o->type == OBJ_COMMIT) | |
497 | o->flags |= TMP_MARK; | |
498 | memcpy(namebuf, oid_to_hex(&o->oid), hexsz); | |
499 | if (write_in_full(cmd->in, namebuf, hexsz + 1) < 0) | |
500 | goto error; | |
501 | } | |
502 | close(cmd->in); | |
503 | cmd->in = -1; | |
504 | sigchain_pop(SIGPIPE); | |
505 | ||
506 | return 0; | |
507 | ||
508 | error: | |
509 | sigchain_pop(SIGPIPE); | |
510 | ||
511 | if (cmd->in >= 0) | |
512 | close(cmd->in); | |
513 | if (cmd->out >= 0) | |
514 | close(cmd->out); | |
515 | return -1; | |
516 | } | |
517 | ||
518 | static int get_reachable_list(struct object_array *src, | |
519 | struct object_array *reachable) | |
520 | { | |
521 | struct child_process cmd = CHILD_PROCESS_INIT; | |
522 | int i; | |
523 | struct object *o; | |
524 | char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */ | |
525 | const unsigned hexsz = the_hash_algo->hexsz; | |
526 | ||
527 | if (do_reachable_revlist(&cmd, src, reachable) < 0) | |
528 | return -1; | |
529 | ||
530 | while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) { | |
531 | struct object_id sha1; | |
532 | const char *p; | |
533 | ||
534 | if (parse_oid_hex(namebuf, &sha1, &p) || *p != '\n') | |
535 | break; | |
536 | ||
537 | o = lookup_object(the_repository, sha1.hash); | |
538 | if (o && o->type == OBJ_COMMIT) { | |
539 | o->flags &= ~TMP_MARK; | |
540 | } | |
541 | } | |
542 | for (i = get_max_object_index(); 0 < i; i--) { | |
543 | o = get_indexed_object(i - 1); | |
544 | if (o && o->type == OBJ_COMMIT && | |
545 | (o->flags & TMP_MARK)) { | |
546 | add_object_array(o, NULL, reachable); | |
547 | o->flags &= ~TMP_MARK; | |
548 | } | |
549 | } | |
550 | close(cmd.out); | |
551 | ||
552 | if (finish_command(&cmd)) | |
553 | return -1; | |
554 | ||
555 | return 0; | |
556 | } | |
557 | ||
558 | static int has_unreachable(struct object_array *src) | |
559 | { | |
560 | struct child_process cmd = CHILD_PROCESS_INIT; | |
561 | char buf[1]; | |
562 | int i; | |
563 | ||
564 | if (do_reachable_revlist(&cmd, src, NULL) < 0) | |
565 | return 1; | |
566 | ||
567 | /* | |
568 | * The commits out of the rev-list are not ancestors of | |
569 | * our ref. | |
570 | */ | |
571 | i = read_in_full(cmd.out, buf, 1); | |
572 | if (i) | |
573 | goto error; | |
574 | close(cmd.out); | |
575 | cmd.out = -1; | |
576 | ||
577 | /* | |
578 | * rev-list may have died by encountering a bad commit | |
579 | * in the history, in which case we do want to bail out | |
580 | * even when it showed no commit. | |
581 | */ | |
582 | if (finish_command(&cmd)) | |
583 | goto error; | |
584 | ||
585 | /* All the non-tip ones are ancestors of what we advertised */ | |
586 | return 0; | |
587 | ||
588 | error: | |
589 | sigchain_pop(SIGPIPE); | |
590 | if (cmd.out >= 0) | |
591 | close(cmd.out); | |
592 | return 1; | |
593 | } | |
594 | ||
595 | static void check_non_tip(struct object_array *want_obj) | |
596 | { | |
597 | int i; | |
598 | ||
599 | /* | |
600 | * In the normal in-process case without | |
601 | * uploadpack.allowReachableSHA1InWant, | |
602 | * non-tip requests can never happen. | |
603 | */ | |
604 | if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1)) | |
605 | goto error; | |
606 | if (!has_unreachable(want_obj)) | |
607 | /* All the non-tip ones are ancestors of what we advertised */ | |
608 | return; | |
609 | ||
610 | error: | |
611 | /* Pick one of them (we know there at least is one) */ | |
612 | for (i = 0; i < want_obj->nr; i++) { | |
613 | struct object *o = want_obj->objects[i].item; | |
614 | if (!is_our_ref(o)) | |
615 | die("git upload-pack: not our ref %s", | |
616 | oid_to_hex(&o->oid)); | |
617 | } | |
618 | } | |
619 | ||
620 | static void send_shallow(struct packet_writer *writer, | |
621 | struct commit_list *result) | |
622 | { | |
623 | while (result) { | |
624 | struct object *object = &result->item->object; | |
625 | if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) { | |
626 | packet_writer_write(writer, "shallow %s", | |
627 | oid_to_hex(&object->oid)); | |
628 | register_shallow(the_repository, &object->oid); | |
629 | shallow_nr++; | |
630 | } | |
631 | result = result->next; | |
632 | } | |
633 | } | |
634 | ||
635 | static void send_unshallow(struct packet_writer *writer, | |
636 | const struct object_array *shallows, | |
637 | struct object_array *want_obj) | |
638 | { | |
639 | int i; | |
640 | ||
641 | for (i = 0; i < shallows->nr; i++) { | |
642 | struct object *object = shallows->objects[i].item; | |
643 | if (object->flags & NOT_SHALLOW) { | |
644 | struct commit_list *parents; | |
645 | packet_writer_write(writer, "unshallow %s", | |
646 | oid_to_hex(&object->oid)); | |
647 | object->flags &= ~CLIENT_SHALLOW; | |
648 | /* | |
649 | * We want to _register_ "object" as shallow, but we | |
650 | * also need to traverse object's parents to deepen a | |
651 | * shallow clone. Unregister it for now so we can | |
652 | * parse and add the parents to the want list, then | |
653 | * re-register it. | |
654 | */ | |
655 | unregister_shallow(&object->oid); | |
656 | object->parsed = 0; | |
657 | parse_commit_or_die((struct commit *)object); | |
658 | parents = ((struct commit *)object)->parents; | |
659 | while (parents) { | |
660 | add_object_array(&parents->item->object, | |
661 | NULL, want_obj); | |
662 | parents = parents->next; | |
663 | } | |
664 | add_object_array(object, NULL, &extra_edge_obj); | |
665 | } | |
666 | /* make sure commit traversal conforms to client */ | |
667 | register_shallow(the_repository, &object->oid); | |
668 | } | |
669 | } | |
670 | ||
671 | static int check_ref(const char *refname_full, const struct object_id *oid, | |
672 | int flag, void *cb_data); | |
673 | static void deepen(struct packet_writer *writer, int depth, int deepen_relative, | |
674 | struct object_array *shallows, struct object_array *want_obj) | |
675 | { | |
676 | if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) { | |
677 | int i; | |
678 | ||
679 | for (i = 0; i < shallows->nr; i++) { | |
680 | struct object *object = shallows->objects[i].item; | |
681 | object->flags |= NOT_SHALLOW; | |
682 | } | |
683 | } else if (deepen_relative) { | |
684 | struct object_array reachable_shallows = OBJECT_ARRAY_INIT; | |
685 | struct commit_list *result; | |
686 | ||
687 | /* | |
688 | * Checking for reachable shallows requires that our refs be | |
689 | * marked with OUR_REF. | |
690 | */ | |
691 | head_ref_namespaced(check_ref, NULL); | |
692 | for_each_namespaced_ref(check_ref, NULL); | |
693 | ||
694 | get_reachable_list(shallows, &reachable_shallows); | |
695 | result = get_shallow_commits(&reachable_shallows, | |
696 | depth + 1, | |
697 | SHALLOW, NOT_SHALLOW); | |
698 | send_shallow(writer, result); | |
699 | free_commit_list(result); | |
700 | object_array_clear(&reachable_shallows); | |
701 | } else { | |
702 | struct commit_list *result; | |
703 | ||
704 | result = get_shallow_commits(want_obj, depth, | |
705 | SHALLOW, NOT_SHALLOW); | |
706 | send_shallow(writer, result); | |
707 | free_commit_list(result); | |
708 | } | |
709 | ||
710 | send_unshallow(writer, shallows, want_obj); | |
711 | } | |
712 | ||
713 | static void deepen_by_rev_list(struct packet_writer *writer, int ac, | |
714 | const char **av, | |
715 | struct object_array *shallows, | |
716 | struct object_array *want_obj) | |
717 | { | |
718 | struct commit_list *result; | |
719 | ||
720 | close_commit_graph(the_repository); | |
721 | result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW); | |
722 | send_shallow(writer, result); | |
723 | free_commit_list(result); | |
724 | send_unshallow(writer, shallows, want_obj); | |
725 | } | |
726 | ||
727 | /* Returns 1 if a shallow list is sent or 0 otherwise */ | |
728 | static int send_shallow_list(struct packet_writer *writer, | |
729 | int depth, int deepen_rev_list, | |
730 | timestamp_t deepen_since, | |
731 | struct string_list *deepen_not, | |
732 | int deepen_relative, | |
733 | struct object_array *shallows, | |
734 | struct object_array *want_obj) | |
735 | { | |
736 | int ret = 0; | |
737 | ||
738 | if (depth > 0 && deepen_rev_list) | |
739 | die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together"); | |
740 | if (depth > 0) { | |
741 | deepen(writer, depth, deepen_relative, shallows, want_obj); | |
742 | ret = 1; | |
743 | } else if (deepen_rev_list) { | |
744 | struct argv_array av = ARGV_ARRAY_INIT; | |
745 | int i; | |
746 | ||
747 | argv_array_push(&av, "rev-list"); | |
748 | if (deepen_since) | |
749 | argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since); | |
750 | if (deepen_not->nr) { | |
751 | argv_array_push(&av, "--not"); | |
752 | for (i = 0; i < deepen_not->nr; i++) { | |
753 | struct string_list_item *s = deepen_not->items + i; | |
754 | argv_array_push(&av, s->string); | |
755 | } | |
756 | argv_array_push(&av, "--not"); | |
757 | } | |
758 | for (i = 0; i < want_obj->nr; i++) { | |
759 | struct object *o = want_obj->objects[i].item; | |
760 | argv_array_push(&av, oid_to_hex(&o->oid)); | |
761 | } | |
762 | deepen_by_rev_list(writer, av.argc, av.argv, shallows, want_obj); | |
763 | argv_array_clear(&av); | |
764 | ret = 1; | |
765 | } else { | |
766 | if (shallows->nr > 0) { | |
767 | int i; | |
768 | for (i = 0; i < shallows->nr; i++) | |
769 | register_shallow(the_repository, | |
770 | &shallows->objects[i].item->oid); | |
771 | } | |
772 | } | |
773 | ||
774 | shallow_nr += shallows->nr; | |
775 | return ret; | |
776 | } | |
777 | ||
778 | static int process_shallow(const char *line, struct object_array *shallows) | |
779 | { | |
780 | const char *arg; | |
781 | if (skip_prefix(line, "shallow ", &arg)) { | |
782 | struct object_id oid; | |
783 | struct object *object; | |
784 | if (get_oid_hex(arg, &oid)) | |
785 | die("invalid shallow line: %s", line); | |
786 | object = parse_object(the_repository, &oid); | |
787 | if (!object) | |
788 | return 1; | |
789 | if (object->type != OBJ_COMMIT) | |
790 | die("invalid shallow object %s", oid_to_hex(&oid)); | |
791 | if (!(object->flags & CLIENT_SHALLOW)) { | |
792 | object->flags |= CLIENT_SHALLOW; | |
793 | add_object_array(object, NULL, shallows); | |
794 | } | |
795 | return 1; | |
796 | } | |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
801 | static int process_deepen(const char *line, int *depth) | |
802 | { | |
803 | const char *arg; | |
804 | if (skip_prefix(line, "deepen ", &arg)) { | |
805 | char *end = NULL; | |
806 | *depth = (int)strtol(arg, &end, 0); | |
807 | if (!end || *end || *depth <= 0) | |
808 | die("Invalid deepen: %s", line); | |
809 | return 1; | |
810 | } | |
811 | ||
812 | return 0; | |
813 | } | |
814 | ||
815 | static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list) | |
816 | { | |
817 | const char *arg; | |
818 | if (skip_prefix(line, "deepen-since ", &arg)) { | |
819 | char *end = NULL; | |
820 | *deepen_since = parse_timestamp(arg, &end, 0); | |
821 | if (!end || *end || !deepen_since || | |
822 | /* revisions.c's max_age -1 is special */ | |
823 | *deepen_since == -1) | |
824 | die("Invalid deepen-since: %s", line); | |
825 | *deepen_rev_list = 1; | |
826 | return 1; | |
827 | } | |
828 | return 0; | |
829 | } | |
830 | ||
831 | static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list) | |
832 | { | |
833 | const char *arg; | |
834 | if (skip_prefix(line, "deepen-not ", &arg)) { | |
835 | char *ref = NULL; | |
836 | struct object_id oid; | |
837 | if (expand_ref(arg, strlen(arg), &oid, &ref) != 1) | |
838 | die("git upload-pack: ambiguous deepen-not: %s", line); | |
839 | string_list_append(deepen_not, ref); | |
840 | free(ref); | |
841 | *deepen_rev_list = 1; | |
842 | return 1; | |
843 | } | |
844 | return 0; | |
845 | } | |
846 | ||
847 | static void receive_needs(struct packet_reader *reader, struct object_array *want_obj) | |
848 | { | |
849 | struct object_array shallows = OBJECT_ARRAY_INIT; | |
850 | struct string_list deepen_not = STRING_LIST_INIT_DUP; | |
851 | int depth = 0; | |
852 | int has_non_tip = 0; | |
853 | timestamp_t deepen_since = 0; | |
854 | int deepen_rev_list = 0; | |
855 | int deepen_relative = 0; | |
856 | struct packet_writer writer; | |
857 | ||
858 | shallow_nr = 0; | |
859 | packet_writer_init(&writer, 1); | |
860 | for (;;) { | |
861 | struct object *o; | |
862 | const char *features; | |
863 | struct object_id oid_buf; | |
864 | const char *arg; | |
865 | ||
866 | reset_timeout(); | |
867 | if (packet_reader_read(reader) != PACKET_READ_NORMAL) | |
868 | break; | |
869 | ||
870 | if (process_shallow(reader->line, &shallows)) | |
871 | continue; | |
872 | if (process_deepen(reader->line, &depth)) | |
873 | continue; | |
874 | if (process_deepen_since(reader->line, &deepen_since, &deepen_rev_list)) | |
875 | continue; | |
876 | if (process_deepen_not(reader->line, &deepen_not, &deepen_rev_list)) | |
877 | continue; | |
878 | ||
879 | if (skip_prefix(reader->line, "filter ", &arg)) { | |
880 | if (!filter_capability_requested) | |
881 | die("git upload-pack: filtering capability not negotiated"); | |
882 | parse_list_objects_filter(&filter_options, arg); | |
883 | continue; | |
884 | } | |
885 | ||
886 | if (!skip_prefix(reader->line, "want ", &arg) || | |
887 | parse_oid_hex(arg, &oid_buf, &features)) | |
888 | die("git upload-pack: protocol error, " | |
889 | "expected to get object ID, not '%s'", reader->line); | |
890 | ||
891 | if (parse_feature_request(features, "deepen-relative")) | |
892 | deepen_relative = 1; | |
893 | if (parse_feature_request(features, "multi_ack_detailed")) | |
894 | multi_ack = 2; | |
895 | else if (parse_feature_request(features, "multi_ack")) | |
896 | multi_ack = 1; | |
897 | if (parse_feature_request(features, "no-done")) | |
898 | no_done = 1; | |
899 | if (parse_feature_request(features, "thin-pack")) | |
900 | use_thin_pack = 1; | |
901 | if (parse_feature_request(features, "ofs-delta")) | |
902 | use_ofs_delta = 1; | |
903 | if (parse_feature_request(features, "side-band-64k")) | |
904 | use_sideband = LARGE_PACKET_MAX; | |
905 | else if (parse_feature_request(features, "side-band")) | |
906 | use_sideband = DEFAULT_PACKET_MAX; | |
907 | if (parse_feature_request(features, "no-progress")) | |
908 | no_progress = 1; | |
909 | if (parse_feature_request(features, "include-tag")) | |
910 | use_include_tag = 1; | |
911 | if (allow_filter && parse_feature_request(features, "filter")) | |
912 | filter_capability_requested = 1; | |
913 | ||
914 | o = parse_object(the_repository, &oid_buf); | |
915 | if (!o) { | |
916 | packet_writer_error(&writer, | |
917 | "upload-pack: not our ref %s", | |
918 | oid_to_hex(&oid_buf)); | |
919 | die("git upload-pack: not our ref %s", | |
920 | oid_to_hex(&oid_buf)); | |
921 | } | |
922 | if (!(o->flags & WANTED)) { | |
923 | o->flags |= WANTED; | |
924 | if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1 | |
925 | || is_our_ref(o))) | |
926 | has_non_tip = 1; | |
927 | add_object_array(o, NULL, want_obj); | |
928 | } | |
929 | } | |
930 | ||
931 | /* | |
932 | * We have sent all our refs already, and the other end | |
933 | * should have chosen out of them. When we are operating | |
934 | * in the stateless RPC mode, however, their choice may | |
935 | * have been based on the set of older refs advertised | |
936 | * by another process that handled the initial request. | |
937 | */ | |
938 | if (has_non_tip) | |
939 | check_non_tip(want_obj); | |
940 | ||
941 | if (!use_sideband && daemon_mode) | |
942 | no_progress = 1; | |
943 | ||
944 | if (depth == 0 && !deepen_rev_list && shallows.nr == 0) | |
945 | return; | |
946 | ||
947 | if (send_shallow_list(&writer, depth, deepen_rev_list, deepen_since, | |
948 | &deepen_not, deepen_relative, &shallows, | |
949 | want_obj)) | |
950 | packet_flush(1); | |
951 | object_array_clear(&shallows); | |
952 | } | |
953 | ||
954 | /* return non-zero if the ref is hidden, otherwise 0 */ | |
955 | static int mark_our_ref(const char *refname, const char *refname_full, | |
956 | const struct object_id *oid) | |
957 | { | |
958 | struct object *o = lookup_unknown_object(oid->hash); | |
959 | ||
960 | if (ref_is_hidden(refname, refname_full)) { | |
961 | o->flags |= HIDDEN_REF; | |
962 | return 1; | |
963 | } | |
964 | o->flags |= OUR_REF; | |
965 | return 0; | |
966 | } | |
967 | ||
968 | static int check_ref(const char *refname_full, const struct object_id *oid, | |
969 | int flag, void *cb_data) | |
970 | { | |
971 | const char *refname = strip_namespace(refname_full); | |
972 | ||
973 | mark_our_ref(refname, refname_full, oid); | |
974 | return 0; | |
975 | } | |
976 | ||
977 | static void format_symref_info(struct strbuf *buf, struct string_list *symref) | |
978 | { | |
979 | struct string_list_item *item; | |
980 | ||
981 | if (!symref->nr) | |
982 | return; | |
983 | for_each_string_list_item(item, symref) | |
984 | strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util); | |
985 | } | |
986 | ||
987 | static int send_ref(const char *refname, const struct object_id *oid, | |
988 | int flag, void *cb_data) | |
989 | { | |
990 | static const char *capabilities = "multi_ack thin-pack side-band" | |
991 | " side-band-64k ofs-delta shallow deepen-since deepen-not" | |
992 | " deepen-relative no-progress include-tag multi_ack_detailed"; | |
993 | const char *refname_nons = strip_namespace(refname); | |
994 | struct object_id peeled; | |
995 | ||
996 | if (mark_our_ref(refname_nons, refname, oid)) | |
997 | return 0; | |
998 | ||
999 | if (capabilities) { | |
1000 | struct strbuf symref_info = STRBUF_INIT; | |
1001 | ||
1002 | format_symref_info(&symref_info, cb_data); | |
1003 | packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s agent=%s\n", | |
1004 | oid_to_hex(oid), refname_nons, | |
1005 | 0, capabilities, | |
1006 | (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ? | |
1007 | " allow-tip-sha1-in-want" : "", | |
1008 | (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ? | |
1009 | " allow-reachable-sha1-in-want" : "", | |
1010 | stateless_rpc ? " no-done" : "", | |
1011 | symref_info.buf, | |
1012 | allow_filter ? " filter" : "", | |
1013 | git_user_agent_sanitized()); | |
1014 | strbuf_release(&symref_info); | |
1015 | } else { | |
1016 | packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons); | |
1017 | } | |
1018 | capabilities = NULL; | |
1019 | if (!peel_ref(refname, &peeled)) | |
1020 | packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons); | |
1021 | return 0; | |
1022 | } | |
1023 | ||
1024 | static int find_symref(const char *refname, const struct object_id *oid, | |
1025 | int flag, void *cb_data) | |
1026 | { | |
1027 | const char *symref_target; | |
1028 | struct string_list_item *item; | |
1029 | ||
1030 | if ((flag & REF_ISSYMREF) == 0) | |
1031 | return 0; | |
1032 | symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag); | |
1033 | if (!symref_target || (flag & REF_ISSYMREF) == 0) | |
1034 | die("'%s' is a symref but it is not?", refname); | |
1035 | item = string_list_append(cb_data, refname); | |
1036 | item->util = xstrdup(symref_target); | |
1037 | return 0; | |
1038 | } | |
1039 | ||
1040 | static int upload_pack_config(const char *var, const char *value, void *unused) | |
1041 | { | |
1042 | if (!strcmp("uploadpack.allowtipsha1inwant", var)) { | |
1043 | if (git_config_bool(var, value)) | |
1044 | allow_unadvertised_object_request |= ALLOW_TIP_SHA1; | |
1045 | else | |
1046 | allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1; | |
1047 | } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) { | |
1048 | if (git_config_bool(var, value)) | |
1049 | allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1; | |
1050 | else | |
1051 | allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1; | |
1052 | } else if (!strcmp("uploadpack.allowanysha1inwant", var)) { | |
1053 | if (git_config_bool(var, value)) | |
1054 | allow_unadvertised_object_request |= ALLOW_ANY_SHA1; | |
1055 | else | |
1056 | allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1; | |
1057 | } else if (!strcmp("uploadpack.keepalive", var)) { | |
1058 | keepalive = git_config_int(var, value); | |
1059 | if (!keepalive) | |
1060 | keepalive = -1; | |
1061 | } else if (!strcmp("uploadpack.allowfilter", var)) { | |
1062 | allow_filter = git_config_bool(var, value); | |
1063 | } else if (!strcmp("uploadpack.allowrefinwant", var)) { | |
1064 | allow_ref_in_want = git_config_bool(var, value); | |
1065 | } else if (!strcmp("uploadpack.allowsidebandall", var)) { | |
1066 | allow_sideband_all = git_config_bool(var, value); | |
1067 | } | |
1068 | ||
1069 | if (current_config_scope() != CONFIG_SCOPE_REPO) { | |
1070 | if (!strcmp("uploadpack.packobjectshook", var)) | |
1071 | return git_config_string(&pack_objects_hook, var, value); | |
1072 | } | |
1073 | ||
1074 | return parse_hide_refs_config(var, value, "uploadpack"); | |
1075 | } | |
1076 | ||
1077 | void upload_pack(struct upload_pack_options *options) | |
1078 | { | |
1079 | struct string_list symref = STRING_LIST_INIT_DUP; | |
1080 | struct object_array want_obj = OBJECT_ARRAY_INIT; | |
1081 | struct packet_reader reader; | |
1082 | ||
1083 | stateless_rpc = options->stateless_rpc; | |
1084 | timeout = options->timeout; | |
1085 | daemon_mode = options->daemon_mode; | |
1086 | ||
1087 | git_config(upload_pack_config, NULL); | |
1088 | ||
1089 | head_ref_namespaced(find_symref, &symref); | |
1090 | ||
1091 | if (options->advertise_refs || !stateless_rpc) { | |
1092 | reset_timeout(); | |
1093 | head_ref_namespaced(send_ref, &symref); | |
1094 | for_each_namespaced_ref(send_ref, &symref); | |
1095 | advertise_shallow_grafts(1); | |
1096 | packet_flush(1); | |
1097 | } else { | |
1098 | head_ref_namespaced(check_ref, NULL); | |
1099 | for_each_namespaced_ref(check_ref, NULL); | |
1100 | } | |
1101 | string_list_clear(&symref, 1); | |
1102 | if (options->advertise_refs) | |
1103 | return; | |
1104 | ||
1105 | packet_reader_init(&reader, 0, NULL, 0, | |
1106 | PACKET_READ_CHOMP_NEWLINE | | |
1107 | PACKET_READ_DIE_ON_ERR_PACKET); | |
1108 | ||
1109 | receive_needs(&reader, &want_obj); | |
1110 | if (want_obj.nr) { | |
1111 | struct object_array have_obj = OBJECT_ARRAY_INIT; | |
1112 | get_common_commits(&reader, &have_obj, &want_obj); | |
1113 | create_pack_file(&have_obj, &want_obj); | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | struct upload_pack_data { | |
1118 | struct object_array wants; | |
1119 | struct string_list wanted_refs; | |
1120 | struct oid_array haves; | |
1121 | ||
1122 | struct object_array shallows; | |
1123 | struct string_list deepen_not; | |
1124 | int depth; | |
1125 | timestamp_t deepen_since; | |
1126 | int deepen_rev_list; | |
1127 | int deepen_relative; | |
1128 | ||
1129 | struct packet_writer writer; | |
1130 | ||
1131 | unsigned stateless_rpc : 1; | |
1132 | ||
1133 | unsigned use_thin_pack : 1; | |
1134 | unsigned use_ofs_delta : 1; | |
1135 | unsigned no_progress : 1; | |
1136 | unsigned use_include_tag : 1; | |
1137 | unsigned done : 1; | |
1138 | }; | |
1139 | ||
1140 | static void upload_pack_data_init(struct upload_pack_data *data) | |
1141 | { | |
1142 | struct object_array wants = OBJECT_ARRAY_INIT; | |
1143 | struct string_list wanted_refs = STRING_LIST_INIT_DUP; | |
1144 | struct oid_array haves = OID_ARRAY_INIT; | |
1145 | struct object_array shallows = OBJECT_ARRAY_INIT; | |
1146 | struct string_list deepen_not = STRING_LIST_INIT_DUP; | |
1147 | ||
1148 | memset(data, 0, sizeof(*data)); | |
1149 | data->wants = wants; | |
1150 | data->wanted_refs = wanted_refs; | |
1151 | data->haves = haves; | |
1152 | data->shallows = shallows; | |
1153 | data->deepen_not = deepen_not; | |
1154 | packet_writer_init(&data->writer, 1); | |
1155 | } | |
1156 | ||
1157 | static void upload_pack_data_clear(struct upload_pack_data *data) | |
1158 | { | |
1159 | object_array_clear(&data->wants); | |
1160 | string_list_clear(&data->wanted_refs, 1); | |
1161 | oid_array_clear(&data->haves); | |
1162 | object_array_clear(&data->shallows); | |
1163 | string_list_clear(&data->deepen_not, 0); | |
1164 | } | |
1165 | ||
1166 | static int parse_want(struct packet_writer *writer, const char *line, | |
1167 | struct object_array *want_obj) | |
1168 | { | |
1169 | const char *arg; | |
1170 | if (skip_prefix(line, "want ", &arg)) { | |
1171 | struct object_id oid; | |
1172 | struct object *o; | |
1173 | ||
1174 | if (get_oid_hex(arg, &oid)) | |
1175 | die("git upload-pack: protocol error, " | |
1176 | "expected to get oid, not '%s'", line); | |
1177 | ||
1178 | o = parse_object(the_repository, &oid); | |
1179 | if (!o) { | |
1180 | packet_writer_error(writer, | |
1181 | "upload-pack: not our ref %s", | |
1182 | oid_to_hex(&oid)); | |
1183 | die("git upload-pack: not our ref %s", | |
1184 | oid_to_hex(&oid)); | |
1185 | } | |
1186 | ||
1187 | if (!(o->flags & WANTED)) { | |
1188 | o->flags |= WANTED; | |
1189 | add_object_array(o, NULL, want_obj); | |
1190 | } | |
1191 | ||
1192 | return 1; | |
1193 | } | |
1194 | ||
1195 | return 0; | |
1196 | } | |
1197 | ||
1198 | static int parse_want_ref(struct packet_writer *writer, const char *line, | |
1199 | struct string_list *wanted_refs, | |
1200 | struct object_array *want_obj) | |
1201 | { | |
1202 | const char *arg; | |
1203 | if (skip_prefix(line, "want-ref ", &arg)) { | |
1204 | struct object_id oid; | |
1205 | struct string_list_item *item; | |
1206 | struct object *o; | |
1207 | ||
1208 | if (read_ref(arg, &oid)) { | |
1209 | packet_writer_error(writer, "unknown ref %s", arg); | |
1210 | die("unknown ref %s", arg); | |
1211 | } | |
1212 | ||
1213 | item = string_list_append(wanted_refs, arg); | |
1214 | item->util = oiddup(&oid); | |
1215 | ||
1216 | o = parse_object_or_die(&oid, arg); | |
1217 | if (!(o->flags & WANTED)) { | |
1218 | o->flags |= WANTED; | |
1219 | add_object_array(o, NULL, want_obj); | |
1220 | } | |
1221 | ||
1222 | return 1; | |
1223 | } | |
1224 | ||
1225 | return 0; | |
1226 | } | |
1227 | ||
1228 | static int parse_have(const char *line, struct oid_array *haves) | |
1229 | { | |
1230 | const char *arg; | |
1231 | if (skip_prefix(line, "have ", &arg)) { | |
1232 | struct object_id oid; | |
1233 | ||
1234 | if (get_oid_hex(arg, &oid)) | |
1235 | die("git upload-pack: expected SHA1 object, got '%s'", arg); | |
1236 | oid_array_append(haves, &oid); | |
1237 | return 1; | |
1238 | } | |
1239 | ||
1240 | return 0; | |
1241 | } | |
1242 | ||
1243 | static void process_args(struct packet_reader *request, | |
1244 | struct upload_pack_data *data, | |
1245 | struct object_array *want_obj) | |
1246 | { | |
1247 | while (packet_reader_read(request) != PACKET_READ_FLUSH) { | |
1248 | const char *arg = request->line; | |
1249 | const char *p; | |
1250 | ||
1251 | /* process want */ | |
1252 | if (parse_want(&data->writer, arg, want_obj)) | |
1253 | continue; | |
1254 | if (allow_ref_in_want && | |
1255 | parse_want_ref(&data->writer, arg, &data->wanted_refs, | |
1256 | want_obj)) | |
1257 | continue; | |
1258 | /* process have line */ | |
1259 | if (parse_have(arg, &data->haves)) | |
1260 | continue; | |
1261 | ||
1262 | /* process args like thin-pack */ | |
1263 | if (!strcmp(arg, "thin-pack")) { | |
1264 | use_thin_pack = 1; | |
1265 | continue; | |
1266 | } | |
1267 | if (!strcmp(arg, "ofs-delta")) { | |
1268 | use_ofs_delta = 1; | |
1269 | continue; | |
1270 | } | |
1271 | if (!strcmp(arg, "no-progress")) { | |
1272 | no_progress = 1; | |
1273 | continue; | |
1274 | } | |
1275 | if (!strcmp(arg, "include-tag")) { | |
1276 | use_include_tag = 1; | |
1277 | continue; | |
1278 | } | |
1279 | if (!strcmp(arg, "done")) { | |
1280 | data->done = 1; | |
1281 | continue; | |
1282 | } | |
1283 | ||
1284 | /* Shallow related arguments */ | |
1285 | if (process_shallow(arg, &data->shallows)) | |
1286 | continue; | |
1287 | if (process_deepen(arg, &data->depth)) | |
1288 | continue; | |
1289 | if (process_deepen_since(arg, &data->deepen_since, | |
1290 | &data->deepen_rev_list)) | |
1291 | continue; | |
1292 | if (process_deepen_not(arg, &data->deepen_not, | |
1293 | &data->deepen_rev_list)) | |
1294 | continue; | |
1295 | if (!strcmp(arg, "deepen-relative")) { | |
1296 | data->deepen_relative = 1; | |
1297 | continue; | |
1298 | } | |
1299 | ||
1300 | if (allow_filter && skip_prefix(arg, "filter ", &p)) { | |
1301 | parse_list_objects_filter(&filter_options, p); | |
1302 | continue; | |
1303 | } | |
1304 | ||
1305 | if ((git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) || | |
1306 | allow_sideband_all) && | |
1307 | !strcmp(arg, "sideband-all")) { | |
1308 | data->writer.use_sideband = 1; | |
1309 | continue; | |
1310 | } | |
1311 | ||
1312 | /* ignore unknown lines maybe? */ | |
1313 | die("unexpected line: '%s'", arg); | |
1314 | } | |
1315 | } | |
1316 | ||
1317 | static int process_haves(struct oid_array *haves, struct oid_array *common, | |
1318 | struct object_array *have_obj) | |
1319 | { | |
1320 | int i; | |
1321 | ||
1322 | /* Process haves */ | |
1323 | for (i = 0; i < haves->nr; i++) { | |
1324 | const struct object_id *oid = &haves->oid[i]; | |
1325 | struct object *o; | |
1326 | int we_knew_they_have = 0; | |
1327 | ||
1328 | if (!has_object_file(oid)) | |
1329 | continue; | |
1330 | ||
1331 | oid_array_append(common, oid); | |
1332 | ||
1333 | o = parse_object(the_repository, oid); | |
1334 | if (!o) | |
1335 | die("oops (%s)", oid_to_hex(oid)); | |
1336 | if (o->type == OBJ_COMMIT) { | |
1337 | struct commit_list *parents; | |
1338 | struct commit *commit = (struct commit *)o; | |
1339 | if (o->flags & THEY_HAVE) | |
1340 | we_knew_they_have = 1; | |
1341 | else | |
1342 | o->flags |= THEY_HAVE; | |
1343 | if (!oldest_have || (commit->date < oldest_have)) | |
1344 | oldest_have = commit->date; | |
1345 | for (parents = commit->parents; | |
1346 | parents; | |
1347 | parents = parents->next) | |
1348 | parents->item->object.flags |= THEY_HAVE; | |
1349 | } | |
1350 | if (!we_knew_they_have) | |
1351 | add_object_array(o, NULL, have_obj); | |
1352 | } | |
1353 | ||
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | static int send_acks(struct packet_writer *writer, struct oid_array *acks, | |
1358 | const struct object_array *have_obj, | |
1359 | struct object_array *want_obj) | |
1360 | { | |
1361 | int i; | |
1362 | ||
1363 | packet_writer_write(writer, "acknowledgments\n"); | |
1364 | ||
1365 | /* Send Acks */ | |
1366 | if (!acks->nr) | |
1367 | packet_writer_write(writer, "NAK\n"); | |
1368 | ||
1369 | for (i = 0; i < acks->nr; i++) { | |
1370 | packet_writer_write(writer, "ACK %s\n", | |
1371 | oid_to_hex(&acks->oid[i])); | |
1372 | } | |
1373 | ||
1374 | if (ok_to_give_up(have_obj, want_obj)) { | |
1375 | /* Send Ready */ | |
1376 | packet_writer_write(writer, "ready\n"); | |
1377 | return 1; | |
1378 | } | |
1379 | ||
1380 | return 0; | |
1381 | } | |
1382 | ||
1383 | static int process_haves_and_send_acks(struct upload_pack_data *data, | |
1384 | struct object_array *have_obj, | |
1385 | struct object_array *want_obj) | |
1386 | { | |
1387 | struct oid_array common = OID_ARRAY_INIT; | |
1388 | int ret = 0; | |
1389 | ||
1390 | process_haves(&data->haves, &common, have_obj); | |
1391 | if (data->done) { | |
1392 | ret = 1; | |
1393 | } else if (send_acks(&data->writer, &common, have_obj, want_obj)) { | |
1394 | packet_writer_delim(&data->writer); | |
1395 | ret = 1; | |
1396 | } else { | |
1397 | /* Add Flush */ | |
1398 | packet_writer_flush(&data->writer); | |
1399 | ret = 0; | |
1400 | } | |
1401 | ||
1402 | oid_array_clear(&data->haves); | |
1403 | oid_array_clear(&common); | |
1404 | return ret; | |
1405 | } | |
1406 | ||
1407 | static void send_wanted_ref_info(struct upload_pack_data *data) | |
1408 | { | |
1409 | const struct string_list_item *item; | |
1410 | ||
1411 | if (!data->wanted_refs.nr) | |
1412 | return; | |
1413 | ||
1414 | packet_writer_write(&data->writer, "wanted-refs\n"); | |
1415 | ||
1416 | for_each_string_list_item(item, &data->wanted_refs) { | |
1417 | packet_writer_write(&data->writer, "%s %s\n", | |
1418 | oid_to_hex(item->util), | |
1419 | item->string); | |
1420 | } | |
1421 | ||
1422 | packet_writer_delim(&data->writer); | |
1423 | } | |
1424 | ||
1425 | static void send_shallow_info(struct upload_pack_data *data, | |
1426 | struct object_array *want_obj) | |
1427 | { | |
1428 | /* No shallow info needs to be sent */ | |
1429 | if (!data->depth && !data->deepen_rev_list && !data->shallows.nr && | |
1430 | !is_repository_shallow(the_repository)) | |
1431 | return; | |
1432 | ||
1433 | packet_writer_write(&data->writer, "shallow-info\n"); | |
1434 | ||
1435 | if (!send_shallow_list(&data->writer, data->depth, | |
1436 | data->deepen_rev_list, | |
1437 | data->deepen_since, &data->deepen_not, | |
1438 | data->deepen_relative, | |
1439 | &data->shallows, want_obj) && | |
1440 | is_repository_shallow(the_repository)) | |
1441 | deepen(&data->writer, INFINITE_DEPTH, data->deepen_relative, | |
1442 | &data->shallows, want_obj); | |
1443 | ||
1444 | packet_delim(1); | |
1445 | } | |
1446 | ||
1447 | enum fetch_state { | |
1448 | FETCH_PROCESS_ARGS = 0, | |
1449 | FETCH_SEND_ACKS, | |
1450 | FETCH_SEND_PACK, | |
1451 | FETCH_DONE, | |
1452 | }; | |
1453 | ||
1454 | int upload_pack_v2(struct repository *r, struct argv_array *keys, | |
1455 | struct packet_reader *request) | |
1456 | { | |
1457 | enum fetch_state state = FETCH_PROCESS_ARGS; | |
1458 | struct upload_pack_data data; | |
1459 | struct object_array have_obj = OBJECT_ARRAY_INIT; | |
1460 | struct object_array want_obj = OBJECT_ARRAY_INIT; | |
1461 | ||
1462 | clear_object_flags(ALL_FLAGS); | |
1463 | ||
1464 | git_config(upload_pack_config, NULL); | |
1465 | ||
1466 | upload_pack_data_init(&data); | |
1467 | use_sideband = LARGE_PACKET_MAX; | |
1468 | ||
1469 | while (state != FETCH_DONE) { | |
1470 | switch (state) { | |
1471 | case FETCH_PROCESS_ARGS: | |
1472 | process_args(request, &data, &want_obj); | |
1473 | ||
1474 | if (!want_obj.nr) { | |
1475 | /* | |
1476 | * Request didn't contain any 'want' lines, | |
1477 | * guess they didn't want anything. | |
1478 | */ | |
1479 | state = FETCH_DONE; | |
1480 | } else if (data.haves.nr) { | |
1481 | /* | |
1482 | * Request had 'have' lines, so lets ACK them. | |
1483 | */ | |
1484 | state = FETCH_SEND_ACKS; | |
1485 | } else { | |
1486 | /* | |
1487 | * Request had 'want's but no 'have's so we can | |
1488 | * immedietly go to construct and send a pack. | |
1489 | */ | |
1490 | state = FETCH_SEND_PACK; | |
1491 | } | |
1492 | break; | |
1493 | case FETCH_SEND_ACKS: | |
1494 | if (process_haves_and_send_acks(&data, &have_obj, | |
1495 | &want_obj)) | |
1496 | state = FETCH_SEND_PACK; | |
1497 | else | |
1498 | state = FETCH_DONE; | |
1499 | break; | |
1500 | case FETCH_SEND_PACK: | |
1501 | send_wanted_ref_info(&data); | |
1502 | send_shallow_info(&data, &want_obj); | |
1503 | ||
1504 | packet_writer_write(&data.writer, "packfile\n"); | |
1505 | create_pack_file(&have_obj, &want_obj); | |
1506 | state = FETCH_DONE; | |
1507 | break; | |
1508 | case FETCH_DONE: | |
1509 | continue; | |
1510 | } | |
1511 | } | |
1512 | ||
1513 | upload_pack_data_clear(&data); | |
1514 | object_array_clear(&have_obj); | |
1515 | object_array_clear(&want_obj); | |
1516 | return 0; | |
1517 | } | |
1518 | ||
1519 | int upload_pack_advertise(struct repository *r, | |
1520 | struct strbuf *value) | |
1521 | { | |
1522 | if (value) { | |
1523 | int allow_filter_value; | |
1524 | int allow_ref_in_want; | |
1525 | int allow_sideband_all_value; | |
1526 | ||
1527 | strbuf_addstr(value, "shallow"); | |
1528 | ||
1529 | if (!repo_config_get_bool(the_repository, | |
1530 | "uploadpack.allowfilter", | |
1531 | &allow_filter_value) && | |
1532 | allow_filter_value) | |
1533 | strbuf_addstr(value, " filter"); | |
1534 | ||
1535 | if (!repo_config_get_bool(the_repository, | |
1536 | "uploadpack.allowrefinwant", | |
1537 | &allow_ref_in_want) && | |
1538 | allow_ref_in_want) | |
1539 | strbuf_addstr(value, " ref-in-want"); | |
1540 | ||
1541 | if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) || | |
1542 | (!repo_config_get_bool(the_repository, | |
1543 | "uploadpack.allowsidebandall", | |
1544 | &allow_sideband_all_value) && | |
1545 | allow_sideband_all_value)) | |
1546 | strbuf_addstr(value, " sideband-all"); | |
1547 | } | |
1548 | ||
1549 | return 1; | |
1550 | } |