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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 | #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 | static timestamp_t oldest_have; | |
46 | ||
47 | /* Allow specifying sha1 if it is a ref tip. */ | |
48 | #define ALLOW_TIP_SHA1 01 | |
49 | /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */ | |
50 | #define ALLOW_REACHABLE_SHA1 02 | |
51 | /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */ | |
52 | #define ALLOW_ANY_SHA1 07 | |
53 | static unsigned int allow_unadvertised_object_request; | |
54 | static struct object_array extra_edge_obj; | |
55 | ||
56 | /* | |
57 | * Please annotate, and if possible group together, fields used only | |
58 | * for protocol v0 or only for protocol v2. | |
59 | */ | |
60 | struct upload_pack_data { | |
61 | struct string_list symref; /* v0 only */ | |
62 | struct object_array want_obj; | |
63 | struct object_array have_obj; | |
64 | struct oid_array haves; /* v2 only */ | |
65 | struct string_list wanted_refs; /* v2 only */ | |
66 | ||
67 | struct object_array shallows; | |
68 | struct string_list deepen_not; | |
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 | ||
76 | unsigned int timeout; /* v0 only */ | |
77 | enum { | |
78 | NO_MULTI_ACK = 0, | |
79 | MULTI_ACK = 1, | |
80 | MULTI_ACK_DETAILED = 2 | |
81 | } multi_ack; /* v0 only */ | |
82 | ||
83 | /* 0 for no sideband, otherwise DEFAULT_PACKET_MAX or LARGE_PACKET_MAX */ | |
84 | int use_sideband; | |
85 | ||
86 | struct list_objects_filter_options filter_options; | |
87 | ||
88 | struct packet_writer writer; | |
89 | ||
90 | const char *pack_objects_hook; | |
91 | ||
92 | unsigned stateless_rpc : 1; /* v0 only */ | |
93 | unsigned no_done : 1; /* v0 only */ | |
94 | unsigned daemon_mode : 1; /* v0 only */ | |
95 | unsigned filter_capability_requested : 1; /* v0 only */ | |
96 | ||
97 | unsigned use_thin_pack : 1; | |
98 | unsigned use_ofs_delta : 1; | |
99 | unsigned no_progress : 1; | |
100 | unsigned use_include_tag : 1; | |
101 | unsigned allow_filter : 1; | |
102 | ||
103 | unsigned done : 1; /* v2 only */ | |
104 | unsigned allow_ref_in_want : 1; /* v2 only */ | |
105 | unsigned allow_sideband_all : 1; /* v2 only */ | |
106 | }; | |
107 | ||
108 | static void upload_pack_data_init(struct upload_pack_data *data) | |
109 | { | |
110 | struct string_list symref = STRING_LIST_INIT_DUP; | |
111 | struct string_list wanted_refs = STRING_LIST_INIT_DUP; | |
112 | struct object_array want_obj = OBJECT_ARRAY_INIT; | |
113 | struct object_array have_obj = OBJECT_ARRAY_INIT; | |
114 | struct oid_array haves = OID_ARRAY_INIT; | |
115 | struct object_array shallows = OBJECT_ARRAY_INIT; | |
116 | struct string_list deepen_not = STRING_LIST_INIT_DUP; | |
117 | ||
118 | memset(data, 0, sizeof(*data)); | |
119 | data->symref = symref; | |
120 | data->wanted_refs = wanted_refs; | |
121 | data->want_obj = want_obj; | |
122 | data->have_obj = have_obj; | |
123 | data->haves = haves; | |
124 | data->shallows = shallows; | |
125 | data->deepen_not = deepen_not; | |
126 | packet_writer_init(&data->writer, 1); | |
127 | ||
128 | data->keepalive = 5; | |
129 | } | |
130 | ||
131 | static void upload_pack_data_clear(struct upload_pack_data *data) | |
132 | { | |
133 | string_list_clear(&data->symref, 1); | |
134 | string_list_clear(&data->wanted_refs, 1); | |
135 | object_array_clear(&data->want_obj); | |
136 | object_array_clear(&data->have_obj); | |
137 | oid_array_clear(&data->haves); | |
138 | object_array_clear(&data->shallows); | |
139 | string_list_clear(&data->deepen_not, 0); | |
140 | list_objects_filter_release(&data->filter_options); | |
141 | ||
142 | free((char *)data->pack_objects_hook); | |
143 | } | |
144 | ||
145 | static void reset_timeout(unsigned int timeout) | |
146 | { | |
147 | alarm(timeout); | |
148 | } | |
149 | ||
150 | static void send_client_data(int fd, const char *data, ssize_t sz, | |
151 | int use_sideband) | |
152 | { | |
153 | if (use_sideband) { | |
154 | send_sideband(1, fd, data, sz, use_sideband); | |
155 | return; | |
156 | } | |
157 | if (fd == 3) | |
158 | /* emergency quit */ | |
159 | fd = 2; | |
160 | if (fd == 2) { | |
161 | /* XXX: are we happy to lose stuff here? */ | |
162 | xwrite(fd, data, sz); | |
163 | return; | |
164 | } | |
165 | write_or_die(fd, data, sz); | |
166 | } | |
167 | ||
168 | static int write_one_shallow(const struct commit_graft *graft, void *cb_data) | |
169 | { | |
170 | FILE *fp = cb_data; | |
171 | if (graft->nr_parent == -1) | |
172 | fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid)); | |
173 | return 0; | |
174 | } | |
175 | ||
176 | static void create_pack_file(struct upload_pack_data *pack_data) | |
177 | { | |
178 | struct child_process pack_objects = CHILD_PROCESS_INIT; | |
179 | char data[8193], progress[128]; | |
180 | char abort_msg[] = "aborting due to possible repository " | |
181 | "corruption on the remote side."; | |
182 | int buffered = -1; | |
183 | ssize_t sz; | |
184 | int i; | |
185 | FILE *pipe_fd; | |
186 | ||
187 | if (!pack_data->pack_objects_hook) | |
188 | pack_objects.git_cmd = 1; | |
189 | else { | |
190 | argv_array_push(&pack_objects.args, pack_data->pack_objects_hook); | |
191 | argv_array_push(&pack_objects.args, "git"); | |
192 | pack_objects.use_shell = 1; | |
193 | } | |
194 | ||
195 | if (pack_data->shallow_nr) { | |
196 | argv_array_push(&pack_objects.args, "--shallow-file"); | |
197 | argv_array_push(&pack_objects.args, ""); | |
198 | } | |
199 | argv_array_push(&pack_objects.args, "pack-objects"); | |
200 | argv_array_push(&pack_objects.args, "--revs"); | |
201 | if (pack_data->use_thin_pack) | |
202 | argv_array_push(&pack_objects.args, "--thin"); | |
203 | ||
204 | argv_array_push(&pack_objects.args, "--stdout"); | |
205 | if (pack_data->shallow_nr) | |
206 | argv_array_push(&pack_objects.args, "--shallow"); | |
207 | if (!pack_data->no_progress) | |
208 | argv_array_push(&pack_objects.args, "--progress"); | |
209 | if (pack_data->use_ofs_delta) | |
210 | argv_array_push(&pack_objects.args, "--delta-base-offset"); | |
211 | if (pack_data->use_include_tag) | |
212 | argv_array_push(&pack_objects.args, "--include-tag"); | |
213 | if (pack_data->filter_options.choice) { | |
214 | const char *spec = | |
215 | expand_list_objects_filter_spec(&pack_data->filter_options); | |
216 | if (pack_objects.use_shell) { | |
217 | struct strbuf buf = STRBUF_INIT; | |
218 | sq_quote_buf(&buf, spec); | |
219 | argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf); | |
220 | strbuf_release(&buf); | |
221 | } else { | |
222 | argv_array_pushf(&pack_objects.args, "--filter=%s", | |
223 | spec); | |
224 | } | |
225 | } | |
226 | ||
227 | pack_objects.in = -1; | |
228 | pack_objects.out = -1; | |
229 | pack_objects.err = -1; | |
230 | ||
231 | if (start_command(&pack_objects)) | |
232 | die("git upload-pack: unable to fork git-pack-objects"); | |
233 | ||
234 | pipe_fd = xfdopen(pack_objects.in, "w"); | |
235 | ||
236 | if (pack_data->shallow_nr) | |
237 | for_each_commit_graft(write_one_shallow, pipe_fd); | |
238 | ||
239 | for (i = 0; i < pack_data->want_obj.nr; i++) | |
240 | fprintf(pipe_fd, "%s\n", | |
241 | oid_to_hex(&pack_data->want_obj.objects[i].item->oid)); | |
242 | fprintf(pipe_fd, "--not\n"); | |
243 | for (i = 0; i < pack_data->have_obj.nr; i++) | |
244 | fprintf(pipe_fd, "%s\n", | |
245 | oid_to_hex(&pack_data->have_obj.objects[i].item->oid)); | |
246 | for (i = 0; i < extra_edge_obj.nr; i++) | |
247 | fprintf(pipe_fd, "%s\n", | |
248 | oid_to_hex(&extra_edge_obj.objects[i].item->oid)); | |
249 | fprintf(pipe_fd, "\n"); | |
250 | fflush(pipe_fd); | |
251 | fclose(pipe_fd); | |
252 | ||
253 | /* We read from pack_objects.err to capture stderr output for | |
254 | * progress bar, and pack_objects.out to capture the pack data. | |
255 | */ | |
256 | ||
257 | while (1) { | |
258 | struct pollfd pfd[2]; | |
259 | int pe, pu, pollsize, polltimeout; | |
260 | int ret; | |
261 | ||
262 | reset_timeout(pack_data->timeout); | |
263 | ||
264 | pollsize = 0; | |
265 | pe = pu = -1; | |
266 | ||
267 | if (0 <= pack_objects.out) { | |
268 | pfd[pollsize].fd = pack_objects.out; | |
269 | pfd[pollsize].events = POLLIN; | |
270 | pu = pollsize; | |
271 | pollsize++; | |
272 | } | |
273 | if (0 <= pack_objects.err) { | |
274 | pfd[pollsize].fd = pack_objects.err; | |
275 | pfd[pollsize].events = POLLIN; | |
276 | pe = pollsize; | |
277 | pollsize++; | |
278 | } | |
279 | ||
280 | if (!pollsize) | |
281 | break; | |
282 | ||
283 | polltimeout = pack_data->keepalive < 0 | |
284 | ? -1 | |
285 | : 1000 * pack_data->keepalive; | |
286 | ||
287 | ret = poll(pfd, pollsize, polltimeout); | |
288 | ||
289 | if (ret < 0) { | |
290 | if (errno != EINTR) { | |
291 | error_errno("poll failed, resuming"); | |
292 | sleep(1); | |
293 | } | |
294 | continue; | |
295 | } | |
296 | if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) { | |
297 | /* Status ready; we ship that in the side-band | |
298 | * or dump to the standard error. | |
299 | */ | |
300 | sz = xread(pack_objects.err, progress, | |
301 | sizeof(progress)); | |
302 | if (0 < sz) | |
303 | send_client_data(2, progress, sz, | |
304 | pack_data->use_sideband); | |
305 | else if (sz == 0) { | |
306 | close(pack_objects.err); | |
307 | pack_objects.err = -1; | |
308 | } | |
309 | else | |
310 | goto fail; | |
311 | /* give priority to status messages */ | |
312 | continue; | |
313 | } | |
314 | if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) { | |
315 | /* Data ready; we keep the last byte to ourselves | |
316 | * in case we detect broken rev-list, so that we | |
317 | * can leave the stream corrupted. This is | |
318 | * unfortunate -- unpack-objects would happily | |
319 | * accept a valid packdata with trailing garbage, | |
320 | * so appending garbage after we pass all the | |
321 | * pack data is not good enough to signal | |
322 | * breakage to downstream. | |
323 | */ | |
324 | char *cp = data; | |
325 | ssize_t outsz = 0; | |
326 | if (0 <= buffered) { | |
327 | *cp++ = buffered; | |
328 | outsz++; | |
329 | } | |
330 | sz = xread(pack_objects.out, cp, | |
331 | sizeof(data) - outsz); | |
332 | if (0 < sz) | |
333 | ; | |
334 | else if (sz == 0) { | |
335 | close(pack_objects.out); | |
336 | pack_objects.out = -1; | |
337 | } | |
338 | else | |
339 | goto fail; | |
340 | sz += outsz; | |
341 | if (1 < sz) { | |
342 | buffered = data[sz-1] & 0xFF; | |
343 | sz--; | |
344 | } | |
345 | else | |
346 | buffered = -1; | |
347 | send_client_data(1, data, sz, | |
348 | pack_data->use_sideband); | |
349 | } | |
350 | ||
351 | /* | |
352 | * We hit the keepalive timeout without saying anything; send | |
353 | * an empty message on the data sideband just to let the other | |
354 | * side know we're still working on it, but don't have any data | |
355 | * yet. | |
356 | * | |
357 | * If we don't have a sideband channel, there's no room in the | |
358 | * protocol to say anything, so those clients are just out of | |
359 | * luck. | |
360 | */ | |
361 | if (!ret && pack_data->use_sideband) { | |
362 | static const char buf[] = "0005\1"; | |
363 | write_or_die(1, buf, 5); | |
364 | } | |
365 | } | |
366 | ||
367 | if (finish_command(&pack_objects)) { | |
368 | error("git upload-pack: git-pack-objects died with error."); | |
369 | goto fail; | |
370 | } | |
371 | ||
372 | /* flush the data */ | |
373 | if (0 <= buffered) { | |
374 | data[0] = buffered; | |
375 | send_client_data(1, data, 1, | |
376 | pack_data->use_sideband); | |
377 | fprintf(stderr, "flushed.\n"); | |
378 | } | |
379 | if (pack_data->use_sideband) | |
380 | packet_flush(1); | |
381 | return; | |
382 | ||
383 | fail: | |
384 | send_client_data(3, abort_msg, sizeof(abort_msg), | |
385 | pack_data->use_sideband); | |
386 | die("git upload-pack: %s", abort_msg); | |
387 | } | |
388 | ||
389 | static int got_oid(const char *hex, struct object_id *oid, | |
390 | struct object_array *have_obj) | |
391 | { | |
392 | struct object *o; | |
393 | int we_knew_they_have = 0; | |
394 | ||
395 | if (get_oid_hex(hex, oid)) | |
396 | die("git upload-pack: expected SHA1 object, got '%s'", hex); | |
397 | if (!has_object_file(oid)) | |
398 | return -1; | |
399 | ||
400 | o = parse_object(the_repository, oid); | |
401 | if (!o) | |
402 | die("oops (%s)", oid_to_hex(oid)); | |
403 | if (o->type == OBJ_COMMIT) { | |
404 | struct commit_list *parents; | |
405 | struct commit *commit = (struct commit *)o; | |
406 | if (o->flags & THEY_HAVE) | |
407 | we_knew_they_have = 1; | |
408 | else | |
409 | o->flags |= THEY_HAVE; | |
410 | if (!oldest_have || (commit->date < oldest_have)) | |
411 | oldest_have = commit->date; | |
412 | for (parents = commit->parents; | |
413 | parents; | |
414 | parents = parents->next) | |
415 | parents->item->object.flags |= THEY_HAVE; | |
416 | } | |
417 | if (!we_knew_they_have) { | |
418 | add_object_array(o, NULL, have_obj); | |
419 | return 1; | |
420 | } | |
421 | return 0; | |
422 | } | |
423 | ||
424 | static int ok_to_give_up(const struct object_array *have_obj, | |
425 | struct object_array *want_obj) | |
426 | { | |
427 | uint32_t min_generation = GENERATION_NUMBER_ZERO; | |
428 | ||
429 | if (!have_obj->nr) | |
430 | return 0; | |
431 | ||
432 | return can_all_from_reach_with_flag(want_obj, THEY_HAVE, | |
433 | COMMON_KNOWN, oldest_have, | |
434 | min_generation); | |
435 | } | |
436 | ||
437 | static int get_common_commits(struct upload_pack_data *data, | |
438 | struct packet_reader *reader) | |
439 | { | |
440 | struct object_id oid; | |
441 | char last_hex[GIT_MAX_HEXSZ + 1]; | |
442 | int got_common = 0; | |
443 | int got_other = 0; | |
444 | int sent_ready = 0; | |
445 | ||
446 | save_commit_buffer = 0; | |
447 | ||
448 | for (;;) { | |
449 | const char *arg; | |
450 | ||
451 | reset_timeout(data->timeout); | |
452 | ||
453 | if (packet_reader_read(reader) != PACKET_READ_NORMAL) { | |
454 | if (data->multi_ack == MULTI_ACK_DETAILED | |
455 | && got_common | |
456 | && !got_other | |
457 | && ok_to_give_up(&data->have_obj, &data->want_obj)) { | |
458 | sent_ready = 1; | |
459 | packet_write_fmt(1, "ACK %s ready\n", last_hex); | |
460 | } | |
461 | if (data->have_obj.nr == 0 || data->multi_ack) | |
462 | packet_write_fmt(1, "NAK\n"); | |
463 | ||
464 | if (data->no_done && sent_ready) { | |
465 | packet_write_fmt(1, "ACK %s\n", last_hex); | |
466 | return 0; | |
467 | } | |
468 | if (data->stateless_rpc) | |
469 | exit(0); | |
470 | got_common = 0; | |
471 | got_other = 0; | |
472 | continue; | |
473 | } | |
474 | if (skip_prefix(reader->line, "have ", &arg)) { | |
475 | switch (got_oid(arg, &oid, &data->have_obj)) { | |
476 | case -1: /* they have what we do not */ | |
477 | got_other = 1; | |
478 | if (data->multi_ack | |
479 | && ok_to_give_up(&data->have_obj, &data->want_obj)) { | |
480 | const char *hex = oid_to_hex(&oid); | |
481 | if (data->multi_ack == MULTI_ACK_DETAILED) { | |
482 | sent_ready = 1; | |
483 | packet_write_fmt(1, "ACK %s ready\n", hex); | |
484 | } else | |
485 | packet_write_fmt(1, "ACK %s continue\n", hex); | |
486 | } | |
487 | break; | |
488 | default: | |
489 | got_common = 1; | |
490 | oid_to_hex_r(last_hex, &oid); | |
491 | if (data->multi_ack == MULTI_ACK_DETAILED) | |
492 | packet_write_fmt(1, "ACK %s common\n", last_hex); | |
493 | else if (data->multi_ack) | |
494 | packet_write_fmt(1, "ACK %s continue\n", last_hex); | |
495 | else if (data->have_obj.nr == 1) | |
496 | packet_write_fmt(1, "ACK %s\n", last_hex); | |
497 | break; | |
498 | } | |
499 | continue; | |
500 | } | |
501 | if (!strcmp(reader->line, "done")) { | |
502 | if (data->have_obj.nr > 0) { | |
503 | if (data->multi_ack) | |
504 | packet_write_fmt(1, "ACK %s\n", last_hex); | |
505 | return 0; | |
506 | } | |
507 | packet_write_fmt(1, "NAK\n"); | |
508 | return -1; | |
509 | } | |
510 | die("git upload-pack: expected SHA1 list, got '%s'", reader->line); | |
511 | } | |
512 | } | |
513 | ||
514 | static int is_our_ref(struct object *o) | |
515 | { | |
516 | int allow_hidden_ref = (allow_unadvertised_object_request & | |
517 | (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1)); | |
518 | return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF); | |
519 | } | |
520 | ||
521 | /* | |
522 | * on successful case, it's up to the caller to close cmd->out | |
523 | */ | |
524 | static int do_reachable_revlist(struct child_process *cmd, | |
525 | struct object_array *src, | |
526 | struct object_array *reachable) | |
527 | { | |
528 | static const char *argv[] = { | |
529 | "rev-list", "--stdin", NULL, | |
530 | }; | |
531 | struct object *o; | |
532 | char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */ | |
533 | int i; | |
534 | const unsigned hexsz = the_hash_algo->hexsz; | |
535 | ||
536 | cmd->argv = argv; | |
537 | cmd->git_cmd = 1; | |
538 | cmd->no_stderr = 1; | |
539 | cmd->in = -1; | |
540 | cmd->out = -1; | |
541 | ||
542 | /* | |
543 | * If the next rev-list --stdin encounters an unknown commit, | |
544 | * it terminates, which will cause SIGPIPE in the write loop | |
545 | * below. | |
546 | */ | |
547 | sigchain_push(SIGPIPE, SIG_IGN); | |
548 | ||
549 | if (start_command(cmd)) | |
550 | goto error; | |
551 | ||
552 | namebuf[0] = '^'; | |
553 | namebuf[hexsz + 1] = '\n'; | |
554 | for (i = get_max_object_index(); 0 < i; ) { | |
555 | o = get_indexed_object(--i); | |
556 | if (!o) | |
557 | continue; | |
558 | if (reachable && o->type == OBJ_COMMIT) | |
559 | o->flags &= ~TMP_MARK; | |
560 | if (!is_our_ref(o)) | |
561 | continue; | |
562 | memcpy(namebuf + 1, oid_to_hex(&o->oid), hexsz); | |
563 | if (write_in_full(cmd->in, namebuf, hexsz + 2) < 0) | |
564 | goto error; | |
565 | } | |
566 | namebuf[hexsz] = '\n'; | |
567 | for (i = 0; i < src->nr; i++) { | |
568 | o = src->objects[i].item; | |
569 | if (is_our_ref(o)) { | |
570 | if (reachable) | |
571 | add_object_array(o, NULL, reachable); | |
572 | continue; | |
573 | } | |
574 | if (reachable && o->type == OBJ_COMMIT) | |
575 | o->flags |= TMP_MARK; | |
576 | memcpy(namebuf, oid_to_hex(&o->oid), hexsz); | |
577 | if (write_in_full(cmd->in, namebuf, hexsz + 1) < 0) | |
578 | goto error; | |
579 | } | |
580 | close(cmd->in); | |
581 | cmd->in = -1; | |
582 | sigchain_pop(SIGPIPE); | |
583 | ||
584 | return 0; | |
585 | ||
586 | error: | |
587 | sigchain_pop(SIGPIPE); | |
588 | ||
589 | if (cmd->in >= 0) | |
590 | close(cmd->in); | |
591 | if (cmd->out >= 0) | |
592 | close(cmd->out); | |
593 | return -1; | |
594 | } | |
595 | ||
596 | static int get_reachable_list(struct object_array *src, | |
597 | struct object_array *reachable) | |
598 | { | |
599 | struct child_process cmd = CHILD_PROCESS_INIT; | |
600 | int i; | |
601 | struct object *o; | |
602 | char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */ | |
603 | const unsigned hexsz = the_hash_algo->hexsz; | |
604 | ||
605 | if (do_reachable_revlist(&cmd, src, reachable) < 0) | |
606 | return -1; | |
607 | ||
608 | while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) { | |
609 | struct object_id oid; | |
610 | const char *p; | |
611 | ||
612 | if (parse_oid_hex(namebuf, &oid, &p) || *p != '\n') | |
613 | break; | |
614 | ||
615 | o = lookup_object(the_repository, &oid); | |
616 | if (o && o->type == OBJ_COMMIT) { | |
617 | o->flags &= ~TMP_MARK; | |
618 | } | |
619 | } | |
620 | for (i = get_max_object_index(); 0 < i; i--) { | |
621 | o = get_indexed_object(i - 1); | |
622 | if (o && o->type == OBJ_COMMIT && | |
623 | (o->flags & TMP_MARK)) { | |
624 | add_object_array(o, NULL, reachable); | |
625 | o->flags &= ~TMP_MARK; | |
626 | } | |
627 | } | |
628 | close(cmd.out); | |
629 | ||
630 | if (finish_command(&cmd)) | |
631 | return -1; | |
632 | ||
633 | return 0; | |
634 | } | |
635 | ||
636 | static int has_unreachable(struct object_array *src) | |
637 | { | |
638 | struct child_process cmd = CHILD_PROCESS_INIT; | |
639 | char buf[1]; | |
640 | int i; | |
641 | ||
642 | if (do_reachable_revlist(&cmd, src, NULL) < 0) | |
643 | return 1; | |
644 | ||
645 | /* | |
646 | * The commits out of the rev-list are not ancestors of | |
647 | * our ref. | |
648 | */ | |
649 | i = read_in_full(cmd.out, buf, 1); | |
650 | if (i) | |
651 | goto error; | |
652 | close(cmd.out); | |
653 | cmd.out = -1; | |
654 | ||
655 | /* | |
656 | * rev-list may have died by encountering a bad commit | |
657 | * in the history, in which case we do want to bail out | |
658 | * even when it showed no commit. | |
659 | */ | |
660 | if (finish_command(&cmd)) | |
661 | goto error; | |
662 | ||
663 | /* All the non-tip ones are ancestors of what we advertised */ | |
664 | return 0; | |
665 | ||
666 | error: | |
667 | sigchain_pop(SIGPIPE); | |
668 | if (cmd.out >= 0) | |
669 | close(cmd.out); | |
670 | return 1; | |
671 | } | |
672 | ||
673 | static void check_non_tip(struct upload_pack_data *data) | |
674 | { | |
675 | int i; | |
676 | ||
677 | /* | |
678 | * In the normal in-process case without | |
679 | * uploadpack.allowReachableSHA1InWant, | |
680 | * non-tip requests can never happen. | |
681 | */ | |
682 | if (!data->stateless_rpc | |
683 | && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1)) | |
684 | goto error; | |
685 | if (!has_unreachable(&data->want_obj)) | |
686 | /* All the non-tip ones are ancestors of what we advertised */ | |
687 | return; | |
688 | ||
689 | error: | |
690 | /* Pick one of them (we know there at least is one) */ | |
691 | for (i = 0; i < data->want_obj.nr; i++) { | |
692 | struct object *o = data->want_obj.objects[i].item; | |
693 | if (!is_our_ref(o)) { | |
694 | packet_writer_error(&data->writer, | |
695 | "upload-pack: not our ref %s", | |
696 | oid_to_hex(&o->oid)); | |
697 | die("git upload-pack: not our ref %s", | |
698 | oid_to_hex(&o->oid)); | |
699 | } | |
700 | } | |
701 | } | |
702 | ||
703 | static void send_shallow(struct upload_pack_data *data, | |
704 | struct commit_list *result) | |
705 | { | |
706 | while (result) { | |
707 | struct object *object = &result->item->object; | |
708 | if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) { | |
709 | packet_writer_write(&data->writer, "shallow %s", | |
710 | oid_to_hex(&object->oid)); | |
711 | register_shallow(the_repository, &object->oid); | |
712 | data->shallow_nr++; | |
713 | } | |
714 | result = result->next; | |
715 | } | |
716 | } | |
717 | ||
718 | static void send_unshallow(struct upload_pack_data *data) | |
719 | { | |
720 | int i; | |
721 | ||
722 | for (i = 0; i < data->shallows.nr; i++) { | |
723 | struct object *object = data->shallows.objects[i].item; | |
724 | if (object->flags & NOT_SHALLOW) { | |
725 | struct commit_list *parents; | |
726 | packet_writer_write(&data->writer, "unshallow %s", | |
727 | oid_to_hex(&object->oid)); | |
728 | object->flags &= ~CLIENT_SHALLOW; | |
729 | /* | |
730 | * We want to _register_ "object" as shallow, but we | |
731 | * also need to traverse object's parents to deepen a | |
732 | * shallow clone. Unregister it for now so we can | |
733 | * parse and add the parents to the want list, then | |
734 | * re-register it. | |
735 | */ | |
736 | unregister_shallow(&object->oid); | |
737 | object->parsed = 0; | |
738 | parse_commit_or_die((struct commit *)object); | |
739 | parents = ((struct commit *)object)->parents; | |
740 | while (parents) { | |
741 | add_object_array(&parents->item->object, | |
742 | NULL, &data->want_obj); | |
743 | parents = parents->next; | |
744 | } | |
745 | add_object_array(object, NULL, &extra_edge_obj); | |
746 | } | |
747 | /* make sure commit traversal conforms to client */ | |
748 | register_shallow(the_repository, &object->oid); | |
749 | } | |
750 | } | |
751 | ||
752 | static int check_ref(const char *refname_full, const struct object_id *oid, | |
753 | int flag, void *cb_data); | |
754 | static void deepen(struct upload_pack_data *data, int depth) | |
755 | { | |
756 | if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) { | |
757 | int i; | |
758 | ||
759 | for (i = 0; i < data->shallows.nr; i++) { | |
760 | struct object *object = data->shallows.objects[i].item; | |
761 | object->flags |= NOT_SHALLOW; | |
762 | } | |
763 | } else if (data->deepen_relative) { | |
764 | struct object_array reachable_shallows = OBJECT_ARRAY_INIT; | |
765 | struct commit_list *result; | |
766 | ||
767 | /* | |
768 | * Checking for reachable shallows requires that our refs be | |
769 | * marked with OUR_REF. | |
770 | */ | |
771 | head_ref_namespaced(check_ref, NULL); | |
772 | for_each_namespaced_ref(check_ref, NULL); | |
773 | ||
774 | get_reachable_list(&data->shallows, &reachable_shallows); | |
775 | result = get_shallow_commits(&reachable_shallows, | |
776 | depth + 1, | |
777 | SHALLOW, NOT_SHALLOW); | |
778 | send_shallow(data, result); | |
779 | free_commit_list(result); | |
780 | object_array_clear(&reachable_shallows); | |
781 | } else { | |
782 | struct commit_list *result; | |
783 | ||
784 | result = get_shallow_commits(&data->want_obj, depth, | |
785 | SHALLOW, NOT_SHALLOW); | |
786 | send_shallow(data, result); | |
787 | free_commit_list(result); | |
788 | } | |
789 | ||
790 | send_unshallow(data); | |
791 | } | |
792 | ||
793 | static void deepen_by_rev_list(struct upload_pack_data *data, | |
794 | int ac, | |
795 | const char **av) | |
796 | { | |
797 | struct commit_list *result; | |
798 | ||
799 | disable_commit_graph(the_repository); | |
800 | result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW); | |
801 | send_shallow(data, result); | |
802 | free_commit_list(result); | |
803 | send_unshallow(data); | |
804 | } | |
805 | ||
806 | /* Returns 1 if a shallow list is sent or 0 otherwise */ | |
807 | static int send_shallow_list(struct upload_pack_data *data) | |
808 | { | |
809 | int ret = 0; | |
810 | ||
811 | if (data->depth > 0 && data->deepen_rev_list) | |
812 | die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together"); | |
813 | if (data->depth > 0) { | |
814 | deepen(data, data->depth); | |
815 | ret = 1; | |
816 | } else if (data->deepen_rev_list) { | |
817 | struct argv_array av = ARGV_ARRAY_INIT; | |
818 | int i; | |
819 | ||
820 | argv_array_push(&av, "rev-list"); | |
821 | if (data->deepen_since) | |
822 | argv_array_pushf(&av, "--max-age=%"PRItime, data->deepen_since); | |
823 | if (data->deepen_not.nr) { | |
824 | argv_array_push(&av, "--not"); | |
825 | for (i = 0; i < data->deepen_not.nr; i++) { | |
826 | struct string_list_item *s = data->deepen_not.items + i; | |
827 | argv_array_push(&av, s->string); | |
828 | } | |
829 | argv_array_push(&av, "--not"); | |
830 | } | |
831 | for (i = 0; i < data->want_obj.nr; i++) { | |
832 | struct object *o = data->want_obj.objects[i].item; | |
833 | argv_array_push(&av, oid_to_hex(&o->oid)); | |
834 | } | |
835 | deepen_by_rev_list(data, av.argc, av.argv); | |
836 | argv_array_clear(&av); | |
837 | ret = 1; | |
838 | } else { | |
839 | if (data->shallows.nr > 0) { | |
840 | int i; | |
841 | for (i = 0; i < data->shallows.nr; i++) | |
842 | register_shallow(the_repository, | |
843 | &data->shallows.objects[i].item->oid); | |
844 | } | |
845 | } | |
846 | ||
847 | data->shallow_nr += data->shallows.nr; | |
848 | return ret; | |
849 | } | |
850 | ||
851 | static int process_shallow(const char *line, struct object_array *shallows) | |
852 | { | |
853 | const char *arg; | |
854 | if (skip_prefix(line, "shallow ", &arg)) { | |
855 | struct object_id oid; | |
856 | struct object *object; | |
857 | if (get_oid_hex(arg, &oid)) | |
858 | die("invalid shallow line: %s", line); | |
859 | object = parse_object(the_repository, &oid); | |
860 | if (!object) | |
861 | return 1; | |
862 | if (object->type != OBJ_COMMIT) | |
863 | die("invalid shallow object %s", oid_to_hex(&oid)); | |
864 | if (!(object->flags & CLIENT_SHALLOW)) { | |
865 | object->flags |= CLIENT_SHALLOW; | |
866 | add_object_array(object, NULL, shallows); | |
867 | } | |
868 | return 1; | |
869 | } | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
874 | static int process_deepen(const char *line, int *depth) | |
875 | { | |
876 | const char *arg; | |
877 | if (skip_prefix(line, "deepen ", &arg)) { | |
878 | char *end = NULL; | |
879 | *depth = (int)strtol(arg, &end, 0); | |
880 | if (!end || *end || *depth <= 0) | |
881 | die("Invalid deepen: %s", line); | |
882 | return 1; | |
883 | } | |
884 | ||
885 | return 0; | |
886 | } | |
887 | ||
888 | static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list) | |
889 | { | |
890 | const char *arg; | |
891 | if (skip_prefix(line, "deepen-since ", &arg)) { | |
892 | char *end = NULL; | |
893 | *deepen_since = parse_timestamp(arg, &end, 0); | |
894 | if (!end || *end || !deepen_since || | |
895 | /* revisions.c's max_age -1 is special */ | |
896 | *deepen_since == -1) | |
897 | die("Invalid deepen-since: %s", line); | |
898 | *deepen_rev_list = 1; | |
899 | return 1; | |
900 | } | |
901 | return 0; | |
902 | } | |
903 | ||
904 | static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list) | |
905 | { | |
906 | const char *arg; | |
907 | if (skip_prefix(line, "deepen-not ", &arg)) { | |
908 | char *ref = NULL; | |
909 | struct object_id oid; | |
910 | if (expand_ref(the_repository, arg, strlen(arg), &oid, &ref) != 1) | |
911 | die("git upload-pack: ambiguous deepen-not: %s", line); | |
912 | string_list_append(deepen_not, ref); | |
913 | free(ref); | |
914 | *deepen_rev_list = 1; | |
915 | return 1; | |
916 | } | |
917 | return 0; | |
918 | } | |
919 | ||
920 | static void receive_needs(struct upload_pack_data *data, | |
921 | struct packet_reader *reader) | |
922 | { | |
923 | int has_non_tip = 0; | |
924 | ||
925 | data->shallow_nr = 0; | |
926 | for (;;) { | |
927 | struct object *o; | |
928 | const char *features; | |
929 | struct object_id oid_buf; | |
930 | const char *arg; | |
931 | ||
932 | reset_timeout(data->timeout); | |
933 | if (packet_reader_read(reader) != PACKET_READ_NORMAL) | |
934 | break; | |
935 | ||
936 | if (process_shallow(reader->line, &data->shallows)) | |
937 | continue; | |
938 | if (process_deepen(reader->line, &data->depth)) | |
939 | continue; | |
940 | if (process_deepen_since(reader->line, &data->deepen_since, &data->deepen_rev_list)) | |
941 | continue; | |
942 | if (process_deepen_not(reader->line, &data->deepen_not, &data->deepen_rev_list)) | |
943 | continue; | |
944 | ||
945 | if (skip_prefix(reader->line, "filter ", &arg)) { | |
946 | if (!data->filter_capability_requested) | |
947 | die("git upload-pack: filtering capability not negotiated"); | |
948 | list_objects_filter_die_if_populated(&data->filter_options); | |
949 | parse_list_objects_filter(&data->filter_options, arg); | |
950 | continue; | |
951 | } | |
952 | ||
953 | if (!skip_prefix(reader->line, "want ", &arg) || | |
954 | parse_oid_hex(arg, &oid_buf, &features)) | |
955 | die("git upload-pack: protocol error, " | |
956 | "expected to get object ID, not '%s'", reader->line); | |
957 | ||
958 | if (parse_feature_request(features, "deepen-relative")) | |
959 | data->deepen_relative = 1; | |
960 | if (parse_feature_request(features, "multi_ack_detailed")) | |
961 | data->multi_ack = MULTI_ACK_DETAILED; | |
962 | else if (parse_feature_request(features, "multi_ack")) | |
963 | data->multi_ack = MULTI_ACK; | |
964 | if (parse_feature_request(features, "no-done")) | |
965 | data->no_done = 1; | |
966 | if (parse_feature_request(features, "thin-pack")) | |
967 | data->use_thin_pack = 1; | |
968 | if (parse_feature_request(features, "ofs-delta")) | |
969 | data->use_ofs_delta = 1; | |
970 | if (parse_feature_request(features, "side-band-64k")) | |
971 | data->use_sideband = LARGE_PACKET_MAX; | |
972 | else if (parse_feature_request(features, "side-band")) | |
973 | data->use_sideband = DEFAULT_PACKET_MAX; | |
974 | if (parse_feature_request(features, "no-progress")) | |
975 | data->no_progress = 1; | |
976 | if (parse_feature_request(features, "include-tag")) | |
977 | data->use_include_tag = 1; | |
978 | if (data->allow_filter && | |
979 | parse_feature_request(features, "filter")) | |
980 | data->filter_capability_requested = 1; | |
981 | ||
982 | o = parse_object(the_repository, &oid_buf); | |
983 | if (!o) { | |
984 | packet_writer_error(&data->writer, | |
985 | "upload-pack: not our ref %s", | |
986 | oid_to_hex(&oid_buf)); | |
987 | die("git upload-pack: not our ref %s", | |
988 | oid_to_hex(&oid_buf)); | |
989 | } | |
990 | if (!(o->flags & WANTED)) { | |
991 | o->flags |= WANTED; | |
992 | if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1 | |
993 | || is_our_ref(o))) | |
994 | has_non_tip = 1; | |
995 | add_object_array(o, NULL, &data->want_obj); | |
996 | } | |
997 | } | |
998 | ||
999 | /* | |
1000 | * We have sent all our refs already, and the other end | |
1001 | * should have chosen out of them. When we are operating | |
1002 | * in the stateless RPC mode, however, their choice may | |
1003 | * have been based on the set of older refs advertised | |
1004 | * by another process that handled the initial request. | |
1005 | */ | |
1006 | if (has_non_tip) | |
1007 | check_non_tip(data); | |
1008 | ||
1009 | if (!data->use_sideband && data->daemon_mode) | |
1010 | data->no_progress = 1; | |
1011 | ||
1012 | if (data->depth == 0 && !data->deepen_rev_list && data->shallows.nr == 0) | |
1013 | return; | |
1014 | ||
1015 | if (send_shallow_list(data)) | |
1016 | packet_flush(1); | |
1017 | } | |
1018 | ||
1019 | /* return non-zero if the ref is hidden, otherwise 0 */ | |
1020 | static int mark_our_ref(const char *refname, const char *refname_full, | |
1021 | const struct object_id *oid) | |
1022 | { | |
1023 | struct object *o = lookup_unknown_object(oid); | |
1024 | ||
1025 | if (ref_is_hidden(refname, refname_full)) { | |
1026 | o->flags |= HIDDEN_REF; | |
1027 | return 1; | |
1028 | } | |
1029 | o->flags |= OUR_REF; | |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | static int check_ref(const char *refname_full, const struct object_id *oid, | |
1034 | int flag, void *cb_data) | |
1035 | { | |
1036 | const char *refname = strip_namespace(refname_full); | |
1037 | ||
1038 | mark_our_ref(refname, refname_full, oid); | |
1039 | return 0; | |
1040 | } | |
1041 | ||
1042 | static void format_symref_info(struct strbuf *buf, struct string_list *symref) | |
1043 | { | |
1044 | struct string_list_item *item; | |
1045 | ||
1046 | if (!symref->nr) | |
1047 | return; | |
1048 | for_each_string_list_item(item, symref) | |
1049 | strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util); | |
1050 | } | |
1051 | ||
1052 | static int send_ref(const char *refname, const struct object_id *oid, | |
1053 | int flag, void *cb_data) | |
1054 | { | |
1055 | static const char *capabilities = "multi_ack thin-pack side-band" | |
1056 | " side-band-64k ofs-delta shallow deepen-since deepen-not" | |
1057 | " deepen-relative no-progress include-tag multi_ack_detailed"; | |
1058 | const char *refname_nons = strip_namespace(refname); | |
1059 | struct object_id peeled; | |
1060 | struct upload_pack_data *data = cb_data; | |
1061 | ||
1062 | if (mark_our_ref(refname_nons, refname, oid)) | |
1063 | return 0; | |
1064 | ||
1065 | if (capabilities) { | |
1066 | struct strbuf symref_info = STRBUF_INIT; | |
1067 | ||
1068 | format_symref_info(&symref_info, &data->symref); | |
1069 | packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s agent=%s\n", | |
1070 | oid_to_hex(oid), refname_nons, | |
1071 | 0, capabilities, | |
1072 | (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ? | |
1073 | " allow-tip-sha1-in-want" : "", | |
1074 | (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ? | |
1075 | " allow-reachable-sha1-in-want" : "", | |
1076 | data->stateless_rpc ? " no-done" : "", | |
1077 | symref_info.buf, | |
1078 | data->allow_filter ? " filter" : "", | |
1079 | git_user_agent_sanitized()); | |
1080 | strbuf_release(&symref_info); | |
1081 | } else { | |
1082 | packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons); | |
1083 | } | |
1084 | capabilities = NULL; | |
1085 | if (!peel_ref(refname, &peeled)) | |
1086 | packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons); | |
1087 | return 0; | |
1088 | } | |
1089 | ||
1090 | static int find_symref(const char *refname, const struct object_id *oid, | |
1091 | int flag, void *cb_data) | |
1092 | { | |
1093 | const char *symref_target; | |
1094 | struct string_list_item *item; | |
1095 | ||
1096 | if ((flag & REF_ISSYMREF) == 0) | |
1097 | return 0; | |
1098 | symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag); | |
1099 | if (!symref_target || (flag & REF_ISSYMREF) == 0) | |
1100 | die("'%s' is a symref but it is not?", refname); | |
1101 | item = string_list_append(cb_data, strip_namespace(refname)); | |
1102 | item->util = xstrdup(strip_namespace(symref_target)); | |
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | static int upload_pack_config(const char *var, const char *value, void *cb_data) | |
1107 | { | |
1108 | struct upload_pack_data *data = cb_data; | |
1109 | ||
1110 | if (!strcmp("uploadpack.allowtipsha1inwant", var)) { | |
1111 | if (git_config_bool(var, value)) | |
1112 | allow_unadvertised_object_request |= ALLOW_TIP_SHA1; | |
1113 | else | |
1114 | allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1; | |
1115 | } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) { | |
1116 | if (git_config_bool(var, value)) | |
1117 | allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1; | |
1118 | else | |
1119 | allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1; | |
1120 | } else if (!strcmp("uploadpack.allowanysha1inwant", var)) { | |
1121 | if (git_config_bool(var, value)) | |
1122 | allow_unadvertised_object_request |= ALLOW_ANY_SHA1; | |
1123 | else | |
1124 | allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1; | |
1125 | } else if (!strcmp("uploadpack.keepalive", var)) { | |
1126 | data->keepalive = git_config_int(var, value); | |
1127 | if (!data->keepalive) | |
1128 | data->keepalive = -1; | |
1129 | } else if (!strcmp("uploadpack.allowfilter", var)) { | |
1130 | data->allow_filter = git_config_bool(var, value); | |
1131 | } else if (!strcmp("uploadpack.allowrefinwant", var)) { | |
1132 | data->allow_ref_in_want = git_config_bool(var, value); | |
1133 | } else if (!strcmp("uploadpack.allowsidebandall", var)) { | |
1134 | data->allow_sideband_all = git_config_bool(var, value); | |
1135 | } else if (!strcmp("core.precomposeunicode", var)) { | |
1136 | precomposed_unicode = git_config_bool(var, value); | |
1137 | } | |
1138 | ||
1139 | if (current_config_scope() != CONFIG_SCOPE_LOCAL && | |
1140 | current_config_scope() != CONFIG_SCOPE_WORKTREE) { | |
1141 | if (!strcmp("uploadpack.packobjectshook", var)) | |
1142 | return git_config_string(&data->pack_objects_hook, var, value); | |
1143 | } | |
1144 | ||
1145 | return parse_hide_refs_config(var, value, "uploadpack"); | |
1146 | } | |
1147 | ||
1148 | void upload_pack(struct upload_pack_options *options) | |
1149 | { | |
1150 | struct packet_reader reader; | |
1151 | struct upload_pack_data data; | |
1152 | ||
1153 | upload_pack_data_init(&data); | |
1154 | ||
1155 | git_config(upload_pack_config, &data); | |
1156 | ||
1157 | data.stateless_rpc = options->stateless_rpc; | |
1158 | data.daemon_mode = options->daemon_mode; | |
1159 | data.timeout = options->timeout; | |
1160 | ||
1161 | head_ref_namespaced(find_symref, &data.symref); | |
1162 | ||
1163 | if (options->advertise_refs || !data.stateless_rpc) { | |
1164 | reset_timeout(data.timeout); | |
1165 | head_ref_namespaced(send_ref, &data); | |
1166 | for_each_namespaced_ref(send_ref, &data); | |
1167 | advertise_shallow_grafts(1); | |
1168 | packet_flush(1); | |
1169 | } else { | |
1170 | head_ref_namespaced(check_ref, NULL); | |
1171 | for_each_namespaced_ref(check_ref, NULL); | |
1172 | } | |
1173 | ||
1174 | if (!options->advertise_refs) { | |
1175 | packet_reader_init(&reader, 0, NULL, 0, | |
1176 | PACKET_READ_CHOMP_NEWLINE | | |
1177 | PACKET_READ_DIE_ON_ERR_PACKET); | |
1178 | ||
1179 | receive_needs(&data, &reader); | |
1180 | if (data.want_obj.nr) { | |
1181 | get_common_commits(&data, &reader); | |
1182 | create_pack_file(&data); | |
1183 | } | |
1184 | } | |
1185 | ||
1186 | upload_pack_data_clear(&data); | |
1187 | } | |
1188 | ||
1189 | static int parse_want(struct packet_writer *writer, const char *line, | |
1190 | struct object_array *want_obj) | |
1191 | { | |
1192 | const char *arg; | |
1193 | if (skip_prefix(line, "want ", &arg)) { | |
1194 | struct object_id oid; | |
1195 | struct object *o; | |
1196 | ||
1197 | if (get_oid_hex(arg, &oid)) | |
1198 | die("git upload-pack: protocol error, " | |
1199 | "expected to get oid, not '%s'", line); | |
1200 | ||
1201 | o = parse_object(the_repository, &oid); | |
1202 | if (!o) { | |
1203 | packet_writer_error(writer, | |
1204 | "upload-pack: not our ref %s", | |
1205 | oid_to_hex(&oid)); | |
1206 | die("git upload-pack: not our ref %s", | |
1207 | oid_to_hex(&oid)); | |
1208 | } | |
1209 | ||
1210 | if (!(o->flags & WANTED)) { | |
1211 | o->flags |= WANTED; | |
1212 | add_object_array(o, NULL, want_obj); | |
1213 | } | |
1214 | ||
1215 | return 1; | |
1216 | } | |
1217 | ||
1218 | return 0; | |
1219 | } | |
1220 | ||
1221 | static int parse_want_ref(struct packet_writer *writer, const char *line, | |
1222 | struct string_list *wanted_refs, | |
1223 | struct object_array *want_obj) | |
1224 | { | |
1225 | const char *arg; | |
1226 | if (skip_prefix(line, "want-ref ", &arg)) { | |
1227 | struct object_id oid; | |
1228 | struct string_list_item *item; | |
1229 | struct object *o; | |
1230 | ||
1231 | if (read_ref(arg, &oid)) { | |
1232 | packet_writer_error(writer, "unknown ref %s", arg); | |
1233 | die("unknown ref %s", arg); | |
1234 | } | |
1235 | ||
1236 | item = string_list_append(wanted_refs, arg); | |
1237 | item->util = oiddup(&oid); | |
1238 | ||
1239 | o = parse_object_or_die(&oid, arg); | |
1240 | if (!(o->flags & WANTED)) { | |
1241 | o->flags |= WANTED; | |
1242 | add_object_array(o, NULL, want_obj); | |
1243 | } | |
1244 | ||
1245 | return 1; | |
1246 | } | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | static int parse_have(const char *line, struct oid_array *haves) | |
1252 | { | |
1253 | const char *arg; | |
1254 | if (skip_prefix(line, "have ", &arg)) { | |
1255 | struct object_id oid; | |
1256 | ||
1257 | if (get_oid_hex(arg, &oid)) | |
1258 | die("git upload-pack: expected SHA1 object, got '%s'", arg); | |
1259 | oid_array_append(haves, &oid); | |
1260 | return 1; | |
1261 | } | |
1262 | ||
1263 | return 0; | |
1264 | } | |
1265 | ||
1266 | static void process_args(struct packet_reader *request, | |
1267 | struct upload_pack_data *data) | |
1268 | { | |
1269 | while (packet_reader_read(request) == PACKET_READ_NORMAL) { | |
1270 | const char *arg = request->line; | |
1271 | const char *p; | |
1272 | ||
1273 | /* process want */ | |
1274 | if (parse_want(&data->writer, arg, &data->want_obj)) | |
1275 | continue; | |
1276 | if (data->allow_ref_in_want && | |
1277 | parse_want_ref(&data->writer, arg, &data->wanted_refs, | |
1278 | &data->want_obj)) | |
1279 | continue; | |
1280 | /* process have line */ | |
1281 | if (parse_have(arg, &data->haves)) | |
1282 | continue; | |
1283 | ||
1284 | /* process args like thin-pack */ | |
1285 | if (!strcmp(arg, "thin-pack")) { | |
1286 | data->use_thin_pack = 1; | |
1287 | continue; | |
1288 | } | |
1289 | if (!strcmp(arg, "ofs-delta")) { | |
1290 | data->use_ofs_delta = 1; | |
1291 | continue; | |
1292 | } | |
1293 | if (!strcmp(arg, "no-progress")) { | |
1294 | data->no_progress = 1; | |
1295 | continue; | |
1296 | } | |
1297 | if (!strcmp(arg, "include-tag")) { | |
1298 | data->use_include_tag = 1; | |
1299 | continue; | |
1300 | } | |
1301 | if (!strcmp(arg, "done")) { | |
1302 | data->done = 1; | |
1303 | continue; | |
1304 | } | |
1305 | ||
1306 | /* Shallow related arguments */ | |
1307 | if (process_shallow(arg, &data->shallows)) | |
1308 | continue; | |
1309 | if (process_deepen(arg, &data->depth)) | |
1310 | continue; | |
1311 | if (process_deepen_since(arg, &data->deepen_since, | |
1312 | &data->deepen_rev_list)) | |
1313 | continue; | |
1314 | if (process_deepen_not(arg, &data->deepen_not, | |
1315 | &data->deepen_rev_list)) | |
1316 | continue; | |
1317 | if (!strcmp(arg, "deepen-relative")) { | |
1318 | data->deepen_relative = 1; | |
1319 | continue; | |
1320 | } | |
1321 | ||
1322 | if (data->allow_filter && skip_prefix(arg, "filter ", &p)) { | |
1323 | list_objects_filter_die_if_populated(&data->filter_options); | |
1324 | parse_list_objects_filter(&data->filter_options, p); | |
1325 | continue; | |
1326 | } | |
1327 | ||
1328 | if ((git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) || | |
1329 | data->allow_sideband_all) && | |
1330 | !strcmp(arg, "sideband-all")) { | |
1331 | data->writer.use_sideband = 1; | |
1332 | continue; | |
1333 | } | |
1334 | ||
1335 | /* ignore unknown lines maybe? */ | |
1336 | die("unexpected line: '%s'", arg); | |
1337 | } | |
1338 | ||
1339 | if (request->status != PACKET_READ_FLUSH) | |
1340 | die(_("expected flush after fetch arguments")); | |
1341 | } | |
1342 | ||
1343 | static int process_haves(struct oid_array *haves, struct oid_array *common, | |
1344 | struct object_array *have_obj) | |
1345 | { | |
1346 | int i; | |
1347 | ||
1348 | /* Process haves */ | |
1349 | for (i = 0; i < haves->nr; i++) { | |
1350 | const struct object_id *oid = &haves->oid[i]; | |
1351 | struct object *o; | |
1352 | int we_knew_they_have = 0; | |
1353 | ||
1354 | if (!has_object_file(oid)) | |
1355 | continue; | |
1356 | ||
1357 | oid_array_append(common, oid); | |
1358 | ||
1359 | o = parse_object(the_repository, oid); | |
1360 | if (!o) | |
1361 | die("oops (%s)", oid_to_hex(oid)); | |
1362 | if (o->type == OBJ_COMMIT) { | |
1363 | struct commit_list *parents; | |
1364 | struct commit *commit = (struct commit *)o; | |
1365 | if (o->flags & THEY_HAVE) | |
1366 | we_knew_they_have = 1; | |
1367 | else | |
1368 | o->flags |= THEY_HAVE; | |
1369 | if (!oldest_have || (commit->date < oldest_have)) | |
1370 | oldest_have = commit->date; | |
1371 | for (parents = commit->parents; | |
1372 | parents; | |
1373 | parents = parents->next) | |
1374 | parents->item->object.flags |= THEY_HAVE; | |
1375 | } | |
1376 | if (!we_knew_they_have) | |
1377 | add_object_array(o, NULL, have_obj); | |
1378 | } | |
1379 | ||
1380 | return 0; | |
1381 | } | |
1382 | ||
1383 | static int send_acks(struct packet_writer *writer, struct oid_array *acks, | |
1384 | const struct object_array *have_obj, | |
1385 | struct object_array *want_obj) | |
1386 | { | |
1387 | int i; | |
1388 | ||
1389 | packet_writer_write(writer, "acknowledgments\n"); | |
1390 | ||
1391 | /* Send Acks */ | |
1392 | if (!acks->nr) | |
1393 | packet_writer_write(writer, "NAK\n"); | |
1394 | ||
1395 | for (i = 0; i < acks->nr; i++) { | |
1396 | packet_writer_write(writer, "ACK %s\n", | |
1397 | oid_to_hex(&acks->oid[i])); | |
1398 | } | |
1399 | ||
1400 | if (ok_to_give_up(have_obj, want_obj)) { | |
1401 | /* Send Ready */ | |
1402 | packet_writer_write(writer, "ready\n"); | |
1403 | return 1; | |
1404 | } | |
1405 | ||
1406 | return 0; | |
1407 | } | |
1408 | ||
1409 | static int process_haves_and_send_acks(struct upload_pack_data *data) | |
1410 | { | |
1411 | struct oid_array common = OID_ARRAY_INIT; | |
1412 | int ret = 0; | |
1413 | ||
1414 | process_haves(&data->haves, &common, &data->have_obj); | |
1415 | if (data->done) { | |
1416 | ret = 1; | |
1417 | } else if (send_acks(&data->writer, &common, | |
1418 | &data->have_obj, &data->want_obj)) { | |
1419 | packet_writer_delim(&data->writer); | |
1420 | ret = 1; | |
1421 | } else { | |
1422 | /* Add Flush */ | |
1423 | packet_writer_flush(&data->writer); | |
1424 | ret = 0; | |
1425 | } | |
1426 | ||
1427 | oid_array_clear(&data->haves); | |
1428 | oid_array_clear(&common); | |
1429 | return ret; | |
1430 | } | |
1431 | ||
1432 | static void send_wanted_ref_info(struct upload_pack_data *data) | |
1433 | { | |
1434 | const struct string_list_item *item; | |
1435 | ||
1436 | if (!data->wanted_refs.nr) | |
1437 | return; | |
1438 | ||
1439 | packet_writer_write(&data->writer, "wanted-refs\n"); | |
1440 | ||
1441 | for_each_string_list_item(item, &data->wanted_refs) { | |
1442 | packet_writer_write(&data->writer, "%s %s\n", | |
1443 | oid_to_hex(item->util), | |
1444 | item->string); | |
1445 | } | |
1446 | ||
1447 | packet_writer_delim(&data->writer); | |
1448 | } | |
1449 | ||
1450 | static void send_shallow_info(struct upload_pack_data *data) | |
1451 | { | |
1452 | /* No shallow info needs to be sent */ | |
1453 | if (!data->depth && !data->deepen_rev_list && !data->shallows.nr && | |
1454 | !is_repository_shallow(the_repository)) | |
1455 | return; | |
1456 | ||
1457 | packet_writer_write(&data->writer, "shallow-info\n"); | |
1458 | ||
1459 | if (!send_shallow_list(data) && | |
1460 | is_repository_shallow(the_repository)) | |
1461 | deepen(data, INFINITE_DEPTH); | |
1462 | ||
1463 | packet_delim(1); | |
1464 | } | |
1465 | ||
1466 | enum fetch_state { | |
1467 | FETCH_PROCESS_ARGS = 0, | |
1468 | FETCH_SEND_ACKS, | |
1469 | FETCH_SEND_PACK, | |
1470 | FETCH_DONE, | |
1471 | }; | |
1472 | ||
1473 | int upload_pack_v2(struct repository *r, struct argv_array *keys, | |
1474 | struct packet_reader *request) | |
1475 | { | |
1476 | enum fetch_state state = FETCH_PROCESS_ARGS; | |
1477 | struct upload_pack_data data; | |
1478 | ||
1479 | clear_object_flags(ALL_FLAGS); | |
1480 | ||
1481 | upload_pack_data_init(&data); | |
1482 | data.use_sideband = LARGE_PACKET_MAX; | |
1483 | ||
1484 | git_config(upload_pack_config, &data); | |
1485 | ||
1486 | while (state != FETCH_DONE) { | |
1487 | switch (state) { | |
1488 | case FETCH_PROCESS_ARGS: | |
1489 | process_args(request, &data); | |
1490 | ||
1491 | if (!data.want_obj.nr) { | |
1492 | /* | |
1493 | * Request didn't contain any 'want' lines, | |
1494 | * guess they didn't want anything. | |
1495 | */ | |
1496 | state = FETCH_DONE; | |
1497 | } else if (data.haves.nr) { | |
1498 | /* | |
1499 | * Request had 'have' lines, so lets ACK them. | |
1500 | */ | |
1501 | state = FETCH_SEND_ACKS; | |
1502 | } else { | |
1503 | /* | |
1504 | * Request had 'want's but no 'have's so we can | |
1505 | * immedietly go to construct and send a pack. | |
1506 | */ | |
1507 | state = FETCH_SEND_PACK; | |
1508 | } | |
1509 | break; | |
1510 | case FETCH_SEND_ACKS: | |
1511 | if (process_haves_and_send_acks(&data)) | |
1512 | state = FETCH_SEND_PACK; | |
1513 | else | |
1514 | state = FETCH_DONE; | |
1515 | break; | |
1516 | case FETCH_SEND_PACK: | |
1517 | send_wanted_ref_info(&data); | |
1518 | send_shallow_info(&data); | |
1519 | ||
1520 | packet_writer_write(&data.writer, "packfile\n"); | |
1521 | create_pack_file(&data); | |
1522 | state = FETCH_DONE; | |
1523 | break; | |
1524 | case FETCH_DONE: | |
1525 | continue; | |
1526 | } | |
1527 | } | |
1528 | ||
1529 | upload_pack_data_clear(&data); | |
1530 | return 0; | |
1531 | } | |
1532 | ||
1533 | int upload_pack_advertise(struct repository *r, | |
1534 | struct strbuf *value) | |
1535 | { | |
1536 | if (value) { | |
1537 | int allow_filter_value; | |
1538 | int allow_ref_in_want; | |
1539 | int allow_sideband_all_value; | |
1540 | ||
1541 | strbuf_addstr(value, "shallow"); | |
1542 | ||
1543 | if (!repo_config_get_bool(the_repository, | |
1544 | "uploadpack.allowfilter", | |
1545 | &allow_filter_value) && | |
1546 | allow_filter_value) | |
1547 | strbuf_addstr(value, " filter"); | |
1548 | ||
1549 | if (!repo_config_get_bool(the_repository, | |
1550 | "uploadpack.allowrefinwant", | |
1551 | &allow_ref_in_want) && | |
1552 | allow_ref_in_want) | |
1553 | strbuf_addstr(value, " ref-in-want"); | |
1554 | ||
1555 | if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) || | |
1556 | (!repo_config_get_bool(the_repository, | |
1557 | "uploadpack.allowsidebandall", | |
1558 | &allow_sideband_all_value) && | |
1559 | allow_sideband_all_value)) | |
1560 | strbuf_addstr(value, " sideband-all"); | |
1561 | } | |
1562 | ||
1563 | return 1; | |
1564 | } |