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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 "strvec.h" | |
22 | #include "prio-queue.h" | |
23 | #include "protocol.h" | |
24 | #include "quote.h" | |
25 | #include "upload-pack.h" | |
26 | #include "serve.h" | |
27 | #include "commit-graph.h" | |
28 | #include "commit-reach.h" | |
29 | #include "shallow.h" | |
30 | ||
31 | /* Remember to update object flag allocation in object.h */ | |
32 | #define THEY_HAVE (1u << 11) | |
33 | #define OUR_REF (1u << 12) | |
34 | #define WANTED (1u << 13) | |
35 | #define COMMON_KNOWN (1u << 14) | |
36 | ||
37 | #define SHALLOW (1u << 16) | |
38 | #define NOT_SHALLOW (1u << 17) | |
39 | #define CLIENT_SHALLOW (1u << 18) | |
40 | #define HIDDEN_REF (1u << 19) | |
41 | ||
42 | #define ALL_FLAGS (THEY_HAVE | OUR_REF | WANTED | COMMON_KNOWN | SHALLOW | \ | |
43 | NOT_SHALLOW | CLIENT_SHALLOW | HIDDEN_REF) | |
44 | ||
45 | /* Enum for allowed unadvertised object request (UOR) */ | |
46 | enum allow_uor { | |
47 | /* Allow specifying sha1 if it is a ref tip. */ | |
48 | ALLOW_TIP_SHA1 = 0x01, | |
49 | /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */ | |
50 | ALLOW_REACHABLE_SHA1 = 0x02, | |
51 | /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */ | |
52 | ALLOW_ANY_SHA1 = 0x07 | |
53 | }; | |
54 | ||
55 | /* | |
56 | * Please annotate, and if possible group together, fields used only | |
57 | * for protocol v0 or only for protocol v2. | |
58 | */ | |
59 | struct upload_pack_data { | |
60 | struct string_list symref; /* v0 only */ | |
61 | struct object_array want_obj; | |
62 | struct object_array have_obj; | |
63 | struct oid_array haves; /* v2 only */ | |
64 | struct string_list wanted_refs; /* v2 only */ | |
65 | ||
66 | struct object_array shallows; | |
67 | struct string_list deepen_not; | |
68 | struct object_array extra_edge_obj; | |
69 | int depth; | |
70 | timestamp_t deepen_since; | |
71 | int deepen_rev_list; | |
72 | int deepen_relative; | |
73 | int keepalive; | |
74 | int shallow_nr; | |
75 | timestamp_t oldest_have; | |
76 | ||
77 | unsigned int timeout; /* v0 only */ | |
78 | enum { | |
79 | NO_MULTI_ACK = 0, | |
80 | MULTI_ACK = 1, | |
81 | MULTI_ACK_DETAILED = 2 | |
82 | } multi_ack; /* v0 only */ | |
83 | ||
84 | /* 0 for no sideband, otherwise DEFAULT_PACKET_MAX or LARGE_PACKET_MAX */ | |
85 | int use_sideband; | |
86 | ||
87 | struct string_list uri_protocols; | |
88 | enum allow_uor allow_uor; | |
89 | ||
90 | struct list_objects_filter_options filter_options; | |
91 | struct string_list allowed_filters; | |
92 | ||
93 | struct packet_writer writer; | |
94 | ||
95 | const char *pack_objects_hook; | |
96 | ||
97 | unsigned stateless_rpc : 1; /* v0 only */ | |
98 | unsigned no_done : 1; /* v0 only */ | |
99 | unsigned daemon_mode : 1; /* v0 only */ | |
100 | unsigned filter_capability_requested : 1; /* v0 only */ | |
101 | ||
102 | unsigned use_thin_pack : 1; | |
103 | unsigned use_ofs_delta : 1; | |
104 | unsigned no_progress : 1; | |
105 | unsigned use_include_tag : 1; | |
106 | unsigned allow_filter : 1; | |
107 | unsigned allow_filter_fallback : 1; | |
108 | unsigned long tree_filter_max_depth; | |
109 | ||
110 | unsigned done : 1; /* v2 only */ | |
111 | unsigned allow_ref_in_want : 1; /* v2 only */ | |
112 | unsigned allow_sideband_all : 1; /* v2 only */ | |
113 | }; | |
114 | ||
115 | static void upload_pack_data_init(struct upload_pack_data *data) | |
116 | { | |
117 | struct string_list symref = STRING_LIST_INIT_DUP; | |
118 | struct string_list wanted_refs = STRING_LIST_INIT_DUP; | |
119 | struct object_array want_obj = OBJECT_ARRAY_INIT; | |
120 | struct object_array have_obj = OBJECT_ARRAY_INIT; | |
121 | struct oid_array haves = OID_ARRAY_INIT; | |
122 | struct object_array shallows = OBJECT_ARRAY_INIT; | |
123 | struct string_list deepen_not = STRING_LIST_INIT_DUP; | |
124 | struct string_list uri_protocols = STRING_LIST_INIT_DUP; | |
125 | struct object_array extra_edge_obj = OBJECT_ARRAY_INIT; | |
126 | struct string_list allowed_filters = STRING_LIST_INIT_DUP; | |
127 | ||
128 | memset(data, 0, sizeof(*data)); | |
129 | data->symref = symref; | |
130 | data->wanted_refs = wanted_refs; | |
131 | data->want_obj = want_obj; | |
132 | data->have_obj = have_obj; | |
133 | data->haves = haves; | |
134 | data->shallows = shallows; | |
135 | data->deepen_not = deepen_not; | |
136 | data->uri_protocols = uri_protocols; | |
137 | data->extra_edge_obj = extra_edge_obj; | |
138 | data->allowed_filters = allowed_filters; | |
139 | data->allow_filter_fallback = 1; | |
140 | data->tree_filter_max_depth = ULONG_MAX; | |
141 | packet_writer_init(&data->writer, 1); | |
142 | ||
143 | data->keepalive = 5; | |
144 | } | |
145 | ||
146 | static void upload_pack_data_clear(struct upload_pack_data *data) | |
147 | { | |
148 | string_list_clear(&data->symref, 1); | |
149 | string_list_clear(&data->wanted_refs, 1); | |
150 | object_array_clear(&data->want_obj); | |
151 | object_array_clear(&data->have_obj); | |
152 | oid_array_clear(&data->haves); | |
153 | object_array_clear(&data->shallows); | |
154 | string_list_clear(&data->deepen_not, 0); | |
155 | object_array_clear(&data->extra_edge_obj); | |
156 | list_objects_filter_release(&data->filter_options); | |
157 | string_list_clear(&data->allowed_filters, 1); | |
158 | ||
159 | free((char *)data->pack_objects_hook); | |
160 | } | |
161 | ||
162 | static void reset_timeout(unsigned int timeout) | |
163 | { | |
164 | alarm(timeout); | |
165 | } | |
166 | ||
167 | static void send_client_data(int fd, const char *data, ssize_t sz, | |
168 | int use_sideband) | |
169 | { | |
170 | if (use_sideband) { | |
171 | send_sideband(1, fd, data, sz, use_sideband); | |
172 | return; | |
173 | } | |
174 | if (fd == 3) | |
175 | /* emergency quit */ | |
176 | fd = 2; | |
177 | if (fd == 2) { | |
178 | /* XXX: are we happy to lose stuff here? */ | |
179 | xwrite(fd, data, sz); | |
180 | return; | |
181 | } | |
182 | write_or_die(fd, data, sz); | |
183 | } | |
184 | ||
185 | static int write_one_shallow(const struct commit_graft *graft, void *cb_data) | |
186 | { | |
187 | FILE *fp = cb_data; | |
188 | if (graft->nr_parent == -1) | |
189 | fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid)); | |
190 | return 0; | |
191 | } | |
192 | ||
193 | struct output_state { | |
194 | char buffer[8193]; | |
195 | int used; | |
196 | unsigned packfile_uris_started : 1; | |
197 | unsigned packfile_started : 1; | |
198 | }; | |
199 | ||
200 | static int relay_pack_data(int pack_objects_out, struct output_state *os, | |
201 | int use_sideband, int write_packfile_line) | |
202 | { | |
203 | /* | |
204 | * We keep the last byte to ourselves | |
205 | * in case we detect broken rev-list, so that we | |
206 | * can leave the stream corrupted. This is | |
207 | * unfortunate -- unpack-objects would happily | |
208 | * accept a valid packdata with trailing garbage, | |
209 | * so appending garbage after we pass all the | |
210 | * pack data is not good enough to signal | |
211 | * breakage to downstream. | |
212 | */ | |
213 | ssize_t readsz; | |
214 | ||
215 | readsz = xread(pack_objects_out, os->buffer + os->used, | |
216 | sizeof(os->buffer) - os->used); | |
217 | if (readsz < 0) { | |
218 | return readsz; | |
219 | } | |
220 | os->used += readsz; | |
221 | ||
222 | while (!os->packfile_started) { | |
223 | char *p; | |
224 | if (os->used >= 4 && !memcmp(os->buffer, "PACK", 4)) { | |
225 | os->packfile_started = 1; | |
226 | if (write_packfile_line) { | |
227 | if (os->packfile_uris_started) | |
228 | packet_delim(1); | |
229 | packet_write_fmt(1, "\1packfile\n"); | |
230 | } | |
231 | break; | |
232 | } | |
233 | if ((p = memchr(os->buffer, '\n', os->used))) { | |
234 | if (!os->packfile_uris_started) { | |
235 | os->packfile_uris_started = 1; | |
236 | if (!write_packfile_line) | |
237 | BUG("packfile_uris requires sideband-all"); | |
238 | packet_write_fmt(1, "\1packfile-uris\n"); | |
239 | } | |
240 | *p = '\0'; | |
241 | packet_write_fmt(1, "\1%s\n", os->buffer); | |
242 | ||
243 | os->used -= p - os->buffer + 1; | |
244 | memmove(os->buffer, p + 1, os->used); | |
245 | } else { | |
246 | /* | |
247 | * Incomplete line. | |
248 | */ | |
249 | return readsz; | |
250 | } | |
251 | } | |
252 | ||
253 | if (os->used > 1) { | |
254 | send_client_data(1, os->buffer, os->used - 1, use_sideband); | |
255 | os->buffer[0] = os->buffer[os->used - 1]; | |
256 | os->used = 1; | |
257 | } else { | |
258 | send_client_data(1, os->buffer, os->used, use_sideband); | |
259 | os->used = 0; | |
260 | } | |
261 | ||
262 | return readsz; | |
263 | } | |
264 | ||
265 | static void create_pack_file(struct upload_pack_data *pack_data, | |
266 | const struct string_list *uri_protocols) | |
267 | { | |
268 | struct child_process pack_objects = CHILD_PROCESS_INIT; | |
269 | struct output_state output_state = { { 0 } }; | |
270 | char progress[128]; | |
271 | char abort_msg[] = "aborting due to possible repository " | |
272 | "corruption on the remote side."; | |
273 | ssize_t sz; | |
274 | int i; | |
275 | FILE *pipe_fd; | |
276 | ||
277 | if (!pack_data->pack_objects_hook) | |
278 | pack_objects.git_cmd = 1; | |
279 | else { | |
280 | strvec_push(&pack_objects.args, pack_data->pack_objects_hook); | |
281 | strvec_push(&pack_objects.args, "git"); | |
282 | pack_objects.use_shell = 1; | |
283 | } | |
284 | ||
285 | if (pack_data->shallow_nr) { | |
286 | strvec_push(&pack_objects.args, "--shallow-file"); | |
287 | strvec_push(&pack_objects.args, ""); | |
288 | } | |
289 | strvec_push(&pack_objects.args, "pack-objects"); | |
290 | strvec_push(&pack_objects.args, "--revs"); | |
291 | if (pack_data->use_thin_pack) | |
292 | strvec_push(&pack_objects.args, "--thin"); | |
293 | ||
294 | strvec_push(&pack_objects.args, "--stdout"); | |
295 | if (pack_data->shallow_nr) | |
296 | strvec_push(&pack_objects.args, "--shallow"); | |
297 | if (!pack_data->no_progress) | |
298 | strvec_push(&pack_objects.args, "--progress"); | |
299 | if (pack_data->use_ofs_delta) | |
300 | strvec_push(&pack_objects.args, "--delta-base-offset"); | |
301 | if (pack_data->use_include_tag) | |
302 | strvec_push(&pack_objects.args, "--include-tag"); | |
303 | if (pack_data->filter_options.choice) { | |
304 | const char *spec = | |
305 | expand_list_objects_filter_spec(&pack_data->filter_options); | |
306 | if (pack_objects.use_shell) { | |
307 | struct strbuf buf = STRBUF_INIT; | |
308 | sq_quote_buf(&buf, spec); | |
309 | strvec_pushf(&pack_objects.args, "--filter=%s", buf.buf); | |
310 | strbuf_release(&buf); | |
311 | } else { | |
312 | strvec_pushf(&pack_objects.args, "--filter=%s", spec); | |
313 | } | |
314 | } | |
315 | if (uri_protocols) { | |
316 | for (i = 0; i < uri_protocols->nr; i++) | |
317 | strvec_pushf(&pack_objects.args, "--uri-protocol=%s", | |
318 | uri_protocols->items[i].string); | |
319 | } | |
320 | ||
321 | pack_objects.in = -1; | |
322 | pack_objects.out = -1; | |
323 | pack_objects.err = -1; | |
324 | ||
325 | if (start_command(&pack_objects)) | |
326 | die("git upload-pack: unable to fork git-pack-objects"); | |
327 | ||
328 | pipe_fd = xfdopen(pack_objects.in, "w"); | |
329 | ||
330 | if (pack_data->shallow_nr) | |
331 | for_each_commit_graft(write_one_shallow, pipe_fd); | |
332 | ||
333 | for (i = 0; i < pack_data->want_obj.nr; i++) | |
334 | fprintf(pipe_fd, "%s\n", | |
335 | oid_to_hex(&pack_data->want_obj.objects[i].item->oid)); | |
336 | fprintf(pipe_fd, "--not\n"); | |
337 | for (i = 0; i < pack_data->have_obj.nr; i++) | |
338 | fprintf(pipe_fd, "%s\n", | |
339 | oid_to_hex(&pack_data->have_obj.objects[i].item->oid)); | |
340 | for (i = 0; i < pack_data->extra_edge_obj.nr; i++) | |
341 | fprintf(pipe_fd, "%s\n", | |
342 | oid_to_hex(&pack_data->extra_edge_obj.objects[i].item->oid)); | |
343 | fprintf(pipe_fd, "\n"); | |
344 | fflush(pipe_fd); | |
345 | fclose(pipe_fd); | |
346 | ||
347 | /* We read from pack_objects.err to capture stderr output for | |
348 | * progress bar, and pack_objects.out to capture the pack data. | |
349 | */ | |
350 | ||
351 | while (1) { | |
352 | struct pollfd pfd[2]; | |
353 | int pe, pu, pollsize, polltimeout; | |
354 | int ret; | |
355 | ||
356 | reset_timeout(pack_data->timeout); | |
357 | ||
358 | pollsize = 0; | |
359 | pe = pu = -1; | |
360 | ||
361 | if (0 <= pack_objects.out) { | |
362 | pfd[pollsize].fd = pack_objects.out; | |
363 | pfd[pollsize].events = POLLIN; | |
364 | pu = pollsize; | |
365 | pollsize++; | |
366 | } | |
367 | if (0 <= pack_objects.err) { | |
368 | pfd[pollsize].fd = pack_objects.err; | |
369 | pfd[pollsize].events = POLLIN; | |
370 | pe = pollsize; | |
371 | pollsize++; | |
372 | } | |
373 | ||
374 | if (!pollsize) | |
375 | break; | |
376 | ||
377 | polltimeout = pack_data->keepalive < 0 | |
378 | ? -1 | |
379 | : 1000 * pack_data->keepalive; | |
380 | ||
381 | ret = poll(pfd, pollsize, polltimeout); | |
382 | ||
383 | if (ret < 0) { | |
384 | if (errno != EINTR) { | |
385 | error_errno("poll failed, resuming"); | |
386 | sleep(1); | |
387 | } | |
388 | continue; | |
389 | } | |
390 | if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) { | |
391 | /* Status ready; we ship that in the side-band | |
392 | * or dump to the standard error. | |
393 | */ | |
394 | sz = xread(pack_objects.err, progress, | |
395 | sizeof(progress)); | |
396 | if (0 < sz) | |
397 | send_client_data(2, progress, sz, | |
398 | pack_data->use_sideband); | |
399 | else if (sz == 0) { | |
400 | close(pack_objects.err); | |
401 | pack_objects.err = -1; | |
402 | } | |
403 | else | |
404 | goto fail; | |
405 | /* give priority to status messages */ | |
406 | continue; | |
407 | } | |
408 | if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) { | |
409 | int result = relay_pack_data(pack_objects.out, | |
410 | &output_state, | |
411 | pack_data->use_sideband, | |
412 | !!uri_protocols); | |
413 | ||
414 | if (result == 0) { | |
415 | close(pack_objects.out); | |
416 | pack_objects.out = -1; | |
417 | } else if (result < 0) { | |
418 | goto fail; | |
419 | } | |
420 | } | |
421 | ||
422 | /* | |
423 | * We hit the keepalive timeout without saying anything; send | |
424 | * an empty message on the data sideband just to let the other | |
425 | * side know we're still working on it, but don't have any data | |
426 | * yet. | |
427 | * | |
428 | * If we don't have a sideband channel, there's no room in the | |
429 | * protocol to say anything, so those clients are just out of | |
430 | * luck. | |
431 | */ | |
432 | if (!ret && pack_data->use_sideband) { | |
433 | static const char buf[] = "0005\1"; | |
434 | write_or_die(1, buf, 5); | |
435 | } | |
436 | } | |
437 | ||
438 | if (finish_command(&pack_objects)) { | |
439 | error("git upload-pack: git-pack-objects died with error."); | |
440 | goto fail; | |
441 | } | |
442 | ||
443 | /* flush the data */ | |
444 | if (output_state.used > 0) { | |
445 | send_client_data(1, output_state.buffer, output_state.used, | |
446 | pack_data->use_sideband); | |
447 | fprintf(stderr, "flushed.\n"); | |
448 | } | |
449 | if (pack_data->use_sideband) | |
450 | packet_flush(1); | |
451 | return; | |
452 | ||
453 | fail: | |
454 | send_client_data(3, abort_msg, sizeof(abort_msg), | |
455 | pack_data->use_sideband); | |
456 | die("git upload-pack: %s", abort_msg); | |
457 | } | |
458 | ||
459 | static int do_got_oid(struct upload_pack_data *data, const struct object_id *oid) | |
460 | { | |
461 | int we_knew_they_have = 0; | |
462 | struct object *o = parse_object(the_repository, oid); | |
463 | ||
464 | if (!o) | |
465 | die("oops (%s)", oid_to_hex(oid)); | |
466 | if (o->type == OBJ_COMMIT) { | |
467 | struct commit_list *parents; | |
468 | struct commit *commit = (struct commit *)o; | |
469 | if (o->flags & THEY_HAVE) | |
470 | we_knew_they_have = 1; | |
471 | else | |
472 | o->flags |= THEY_HAVE; | |
473 | if (!data->oldest_have || (commit->date < data->oldest_have)) | |
474 | data->oldest_have = commit->date; | |
475 | for (parents = commit->parents; | |
476 | parents; | |
477 | parents = parents->next) | |
478 | parents->item->object.flags |= THEY_HAVE; | |
479 | } | |
480 | if (!we_knew_they_have) { | |
481 | add_object_array(o, NULL, &data->have_obj); | |
482 | return 1; | |
483 | } | |
484 | return 0; | |
485 | } | |
486 | ||
487 | static int got_oid(struct upload_pack_data *data, | |
488 | const char *hex, struct object_id *oid) | |
489 | { | |
490 | if (get_oid_hex(hex, oid)) | |
491 | die("git upload-pack: expected SHA1 object, got '%s'", hex); | |
492 | if (!has_object_file_with_flags(oid, | |
493 | OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT)) | |
494 | return -1; | |
495 | return do_got_oid(data, oid); | |
496 | } | |
497 | ||
498 | static int ok_to_give_up(struct upload_pack_data *data) | |
499 | { | |
500 | uint32_t min_generation = GENERATION_NUMBER_ZERO; | |
501 | ||
502 | if (!data->have_obj.nr) | |
503 | return 0; | |
504 | ||
505 | return can_all_from_reach_with_flag(&data->want_obj, THEY_HAVE, | |
506 | COMMON_KNOWN, data->oldest_have, | |
507 | min_generation); | |
508 | } | |
509 | ||
510 | static int get_common_commits(struct upload_pack_data *data, | |
511 | struct packet_reader *reader) | |
512 | { | |
513 | struct object_id oid; | |
514 | char last_hex[GIT_MAX_HEXSZ + 1]; | |
515 | int got_common = 0; | |
516 | int got_other = 0; | |
517 | int sent_ready = 0; | |
518 | ||
519 | save_commit_buffer = 0; | |
520 | ||
521 | for (;;) { | |
522 | const char *arg; | |
523 | ||
524 | reset_timeout(data->timeout); | |
525 | ||
526 | if (packet_reader_read(reader) != PACKET_READ_NORMAL) { | |
527 | if (data->multi_ack == MULTI_ACK_DETAILED | |
528 | && got_common | |
529 | && !got_other | |
530 | && ok_to_give_up(data)) { | |
531 | sent_ready = 1; | |
532 | packet_write_fmt(1, "ACK %s ready\n", last_hex); | |
533 | } | |
534 | if (data->have_obj.nr == 0 || data->multi_ack) | |
535 | packet_write_fmt(1, "NAK\n"); | |
536 | ||
537 | if (data->no_done && sent_ready) { | |
538 | packet_write_fmt(1, "ACK %s\n", last_hex); | |
539 | return 0; | |
540 | } | |
541 | if (data->stateless_rpc) | |
542 | exit(0); | |
543 | got_common = 0; | |
544 | got_other = 0; | |
545 | continue; | |
546 | } | |
547 | if (skip_prefix(reader->line, "have ", &arg)) { | |
548 | switch (got_oid(data, arg, &oid)) { | |
549 | case -1: /* they have what we do not */ | |
550 | got_other = 1; | |
551 | if (data->multi_ack | |
552 | && ok_to_give_up(data)) { | |
553 | const char *hex = oid_to_hex(&oid); | |
554 | if (data->multi_ack == MULTI_ACK_DETAILED) { | |
555 | sent_ready = 1; | |
556 | packet_write_fmt(1, "ACK %s ready\n", hex); | |
557 | } else | |
558 | packet_write_fmt(1, "ACK %s continue\n", hex); | |
559 | } | |
560 | break; | |
561 | default: | |
562 | got_common = 1; | |
563 | oid_to_hex_r(last_hex, &oid); | |
564 | if (data->multi_ack == MULTI_ACK_DETAILED) | |
565 | packet_write_fmt(1, "ACK %s common\n", last_hex); | |
566 | else if (data->multi_ack) | |
567 | packet_write_fmt(1, "ACK %s continue\n", last_hex); | |
568 | else if (data->have_obj.nr == 1) | |
569 | packet_write_fmt(1, "ACK %s\n", last_hex); | |
570 | break; | |
571 | } | |
572 | continue; | |
573 | } | |
574 | if (!strcmp(reader->line, "done")) { | |
575 | if (data->have_obj.nr > 0) { | |
576 | if (data->multi_ack) | |
577 | packet_write_fmt(1, "ACK %s\n", last_hex); | |
578 | return 0; | |
579 | } | |
580 | packet_write_fmt(1, "NAK\n"); | |
581 | return -1; | |
582 | } | |
583 | die("git upload-pack: expected SHA1 list, got '%s'", reader->line); | |
584 | } | |
585 | } | |
586 | ||
587 | static int is_our_ref(struct object *o, enum allow_uor allow_uor) | |
588 | { | |
589 | int allow_hidden_ref = (allow_uor & | |
590 | (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1)); | |
591 | return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF); | |
592 | } | |
593 | ||
594 | /* | |
595 | * on successful case, it's up to the caller to close cmd->out | |
596 | */ | |
597 | static int do_reachable_revlist(struct child_process *cmd, | |
598 | struct object_array *src, | |
599 | struct object_array *reachable, | |
600 | enum allow_uor allow_uor) | |
601 | { | |
602 | static const char *argv[] = { | |
603 | "rev-list", "--stdin", NULL, | |
604 | }; | |
605 | struct object *o; | |
606 | char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */ | |
607 | int i; | |
608 | const unsigned hexsz = the_hash_algo->hexsz; | |
609 | ||
610 | cmd->argv = argv; | |
611 | cmd->git_cmd = 1; | |
612 | cmd->no_stderr = 1; | |
613 | cmd->in = -1; | |
614 | cmd->out = -1; | |
615 | ||
616 | /* | |
617 | * If the next rev-list --stdin encounters an unknown commit, | |
618 | * it terminates, which will cause SIGPIPE in the write loop | |
619 | * below. | |
620 | */ | |
621 | sigchain_push(SIGPIPE, SIG_IGN); | |
622 | ||
623 | if (start_command(cmd)) | |
624 | goto error; | |
625 | ||
626 | namebuf[0] = '^'; | |
627 | namebuf[hexsz + 1] = '\n'; | |
628 | for (i = get_max_object_index(); 0 < i; ) { | |
629 | o = get_indexed_object(--i); | |
630 | if (!o) | |
631 | continue; | |
632 | if (reachable && o->type == OBJ_COMMIT) | |
633 | o->flags &= ~TMP_MARK; | |
634 | if (!is_our_ref(o, allow_uor)) | |
635 | continue; | |
636 | memcpy(namebuf + 1, oid_to_hex(&o->oid), hexsz); | |
637 | if (write_in_full(cmd->in, namebuf, hexsz + 2) < 0) | |
638 | goto error; | |
639 | } | |
640 | namebuf[hexsz] = '\n'; | |
641 | for (i = 0; i < src->nr; i++) { | |
642 | o = src->objects[i].item; | |
643 | if (is_our_ref(o, allow_uor)) { | |
644 | if (reachable) | |
645 | add_object_array(o, NULL, reachable); | |
646 | continue; | |
647 | } | |
648 | if (reachable && o->type == OBJ_COMMIT) | |
649 | o->flags |= TMP_MARK; | |
650 | memcpy(namebuf, oid_to_hex(&o->oid), hexsz); | |
651 | if (write_in_full(cmd->in, namebuf, hexsz + 1) < 0) | |
652 | goto error; | |
653 | } | |
654 | close(cmd->in); | |
655 | cmd->in = -1; | |
656 | sigchain_pop(SIGPIPE); | |
657 | ||
658 | return 0; | |
659 | ||
660 | error: | |
661 | sigchain_pop(SIGPIPE); | |
662 | ||
663 | if (cmd->in >= 0) | |
664 | close(cmd->in); | |
665 | if (cmd->out >= 0) | |
666 | close(cmd->out); | |
667 | return -1; | |
668 | } | |
669 | ||
670 | static int get_reachable_list(struct upload_pack_data *data, | |
671 | struct object_array *reachable) | |
672 | { | |
673 | struct child_process cmd = CHILD_PROCESS_INIT; | |
674 | int i; | |
675 | struct object *o; | |
676 | char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */ | |
677 | const unsigned hexsz = the_hash_algo->hexsz; | |
678 | ||
679 | if (do_reachable_revlist(&cmd, &data->shallows, reachable, | |
680 | data->allow_uor) < 0) | |
681 | return -1; | |
682 | ||
683 | while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) { | |
684 | struct object_id oid; | |
685 | const char *p; | |
686 | ||
687 | if (parse_oid_hex(namebuf, &oid, &p) || *p != '\n') | |
688 | break; | |
689 | ||
690 | o = lookup_object(the_repository, &oid); | |
691 | if (o && o->type == OBJ_COMMIT) { | |
692 | o->flags &= ~TMP_MARK; | |
693 | } | |
694 | } | |
695 | for (i = get_max_object_index(); 0 < i; i--) { | |
696 | o = get_indexed_object(i - 1); | |
697 | if (o && o->type == OBJ_COMMIT && | |
698 | (o->flags & TMP_MARK)) { | |
699 | add_object_array(o, NULL, reachable); | |
700 | o->flags &= ~TMP_MARK; | |
701 | } | |
702 | } | |
703 | close(cmd.out); | |
704 | ||
705 | if (finish_command(&cmd)) | |
706 | return -1; | |
707 | ||
708 | return 0; | |
709 | } | |
710 | ||
711 | static int has_unreachable(struct object_array *src, enum allow_uor allow_uor) | |
712 | { | |
713 | struct child_process cmd = CHILD_PROCESS_INIT; | |
714 | char buf[1]; | |
715 | int i; | |
716 | ||
717 | if (do_reachable_revlist(&cmd, src, NULL, allow_uor) < 0) | |
718 | return 1; | |
719 | ||
720 | /* | |
721 | * The commits out of the rev-list are not ancestors of | |
722 | * our ref. | |
723 | */ | |
724 | i = read_in_full(cmd.out, buf, 1); | |
725 | if (i) | |
726 | goto error; | |
727 | close(cmd.out); | |
728 | cmd.out = -1; | |
729 | ||
730 | /* | |
731 | * rev-list may have died by encountering a bad commit | |
732 | * in the history, in which case we do want to bail out | |
733 | * even when it showed no commit. | |
734 | */ | |
735 | if (finish_command(&cmd)) | |
736 | goto error; | |
737 | ||
738 | /* All the non-tip ones are ancestors of what we advertised */ | |
739 | return 0; | |
740 | ||
741 | error: | |
742 | if (cmd.out >= 0) | |
743 | close(cmd.out); | |
744 | return 1; | |
745 | } | |
746 | ||
747 | static void check_non_tip(struct upload_pack_data *data) | |
748 | { | |
749 | int i; | |
750 | ||
751 | /* | |
752 | * In the normal in-process case without | |
753 | * uploadpack.allowReachableSHA1InWant, | |
754 | * non-tip requests can never happen. | |
755 | */ | |
756 | if (!data->stateless_rpc && !(data->allow_uor & ALLOW_REACHABLE_SHA1)) | |
757 | goto error; | |
758 | if (!has_unreachable(&data->want_obj, data->allow_uor)) | |
759 | /* All the non-tip ones are ancestors of what we advertised */ | |
760 | return; | |
761 | ||
762 | error: | |
763 | /* Pick one of them (we know there at least is one) */ | |
764 | for (i = 0; i < data->want_obj.nr; i++) { | |
765 | struct object *o = data->want_obj.objects[i].item; | |
766 | if (!is_our_ref(o, data->allow_uor)) { | |
767 | packet_writer_error(&data->writer, | |
768 | "upload-pack: not our ref %s", | |
769 | oid_to_hex(&o->oid)); | |
770 | die("git upload-pack: not our ref %s", | |
771 | oid_to_hex(&o->oid)); | |
772 | } | |
773 | } | |
774 | } | |
775 | ||
776 | static void send_shallow(struct upload_pack_data *data, | |
777 | struct commit_list *result) | |
778 | { | |
779 | while (result) { | |
780 | struct object *object = &result->item->object; | |
781 | if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) { | |
782 | packet_writer_write(&data->writer, "shallow %s", | |
783 | oid_to_hex(&object->oid)); | |
784 | register_shallow(the_repository, &object->oid); | |
785 | data->shallow_nr++; | |
786 | } | |
787 | result = result->next; | |
788 | } | |
789 | } | |
790 | ||
791 | static void send_unshallow(struct upload_pack_data *data) | |
792 | { | |
793 | int i; | |
794 | ||
795 | for (i = 0; i < data->shallows.nr; i++) { | |
796 | struct object *object = data->shallows.objects[i].item; | |
797 | if (object->flags & NOT_SHALLOW) { | |
798 | struct commit_list *parents; | |
799 | packet_writer_write(&data->writer, "unshallow %s", | |
800 | oid_to_hex(&object->oid)); | |
801 | object->flags &= ~CLIENT_SHALLOW; | |
802 | /* | |
803 | * We want to _register_ "object" as shallow, but we | |
804 | * also need to traverse object's parents to deepen a | |
805 | * shallow clone. Unregister it for now so we can | |
806 | * parse and add the parents to the want list, then | |
807 | * re-register it. | |
808 | */ | |
809 | unregister_shallow(&object->oid); | |
810 | object->parsed = 0; | |
811 | parse_commit_or_die((struct commit *)object); | |
812 | parents = ((struct commit *)object)->parents; | |
813 | while (parents) { | |
814 | add_object_array(&parents->item->object, | |
815 | NULL, &data->want_obj); | |
816 | parents = parents->next; | |
817 | } | |
818 | add_object_array(object, NULL, &data->extra_edge_obj); | |
819 | } | |
820 | /* make sure commit traversal conforms to client */ | |
821 | register_shallow(the_repository, &object->oid); | |
822 | } | |
823 | } | |
824 | ||
825 | static int check_ref(const char *refname_full, const struct object_id *oid, | |
826 | int flag, void *cb_data); | |
827 | static void deepen(struct upload_pack_data *data, int depth) | |
828 | { | |
829 | if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) { | |
830 | int i; | |
831 | ||
832 | for (i = 0; i < data->shallows.nr; i++) { | |
833 | struct object *object = data->shallows.objects[i].item; | |
834 | object->flags |= NOT_SHALLOW; | |
835 | } | |
836 | } else if (data->deepen_relative) { | |
837 | struct object_array reachable_shallows = OBJECT_ARRAY_INIT; | |
838 | struct commit_list *result; | |
839 | ||
840 | /* | |
841 | * Checking for reachable shallows requires that our refs be | |
842 | * marked with OUR_REF. | |
843 | */ | |
844 | head_ref_namespaced(check_ref, NULL); | |
845 | for_each_namespaced_ref(check_ref, NULL); | |
846 | ||
847 | get_reachable_list(data, &reachable_shallows); | |
848 | result = get_shallow_commits(&reachable_shallows, | |
849 | depth + 1, | |
850 | SHALLOW, NOT_SHALLOW); | |
851 | send_shallow(data, result); | |
852 | free_commit_list(result); | |
853 | object_array_clear(&reachable_shallows); | |
854 | } else { | |
855 | struct commit_list *result; | |
856 | ||
857 | result = get_shallow_commits(&data->want_obj, depth, | |
858 | SHALLOW, NOT_SHALLOW); | |
859 | send_shallow(data, result); | |
860 | free_commit_list(result); | |
861 | } | |
862 | ||
863 | send_unshallow(data); | |
864 | } | |
865 | ||
866 | static void deepen_by_rev_list(struct upload_pack_data *data, | |
867 | int ac, | |
868 | const char **av) | |
869 | { | |
870 | struct commit_list *result; | |
871 | ||
872 | disable_commit_graph(the_repository); | |
873 | result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW); | |
874 | send_shallow(data, result); | |
875 | free_commit_list(result); | |
876 | send_unshallow(data); | |
877 | } | |
878 | ||
879 | /* Returns 1 if a shallow list is sent or 0 otherwise */ | |
880 | static int send_shallow_list(struct upload_pack_data *data) | |
881 | { | |
882 | int ret = 0; | |
883 | ||
884 | if (data->depth > 0 && data->deepen_rev_list) | |
885 | die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together"); | |
886 | if (data->depth > 0) { | |
887 | deepen(data, data->depth); | |
888 | ret = 1; | |
889 | } else if (data->deepen_rev_list) { | |
890 | struct strvec av = STRVEC_INIT; | |
891 | int i; | |
892 | ||
893 | strvec_push(&av, "rev-list"); | |
894 | if (data->deepen_since) | |
895 | strvec_pushf(&av, "--max-age=%"PRItime, data->deepen_since); | |
896 | if (data->deepen_not.nr) { | |
897 | strvec_push(&av, "--not"); | |
898 | for (i = 0; i < data->deepen_not.nr; i++) { | |
899 | struct string_list_item *s = data->deepen_not.items + i; | |
900 | strvec_push(&av, s->string); | |
901 | } | |
902 | strvec_push(&av, "--not"); | |
903 | } | |
904 | for (i = 0; i < data->want_obj.nr; i++) { | |
905 | struct object *o = data->want_obj.objects[i].item; | |
906 | strvec_push(&av, oid_to_hex(&o->oid)); | |
907 | } | |
908 | deepen_by_rev_list(data, av.nr, av.v); | |
909 | strvec_clear(&av); | |
910 | ret = 1; | |
911 | } else { | |
912 | if (data->shallows.nr > 0) { | |
913 | int i; | |
914 | for (i = 0; i < data->shallows.nr; i++) | |
915 | register_shallow(the_repository, | |
916 | &data->shallows.objects[i].item->oid); | |
917 | } | |
918 | } | |
919 | ||
920 | data->shallow_nr += data->shallows.nr; | |
921 | return ret; | |
922 | } | |
923 | ||
924 | static int process_shallow(const char *line, struct object_array *shallows) | |
925 | { | |
926 | const char *arg; | |
927 | if (skip_prefix(line, "shallow ", &arg)) { | |
928 | struct object_id oid; | |
929 | struct object *object; | |
930 | if (get_oid_hex(arg, &oid)) | |
931 | die("invalid shallow line: %s", line); | |
932 | object = parse_object(the_repository, &oid); | |
933 | if (!object) | |
934 | return 1; | |
935 | if (object->type != OBJ_COMMIT) | |
936 | die("invalid shallow object %s", oid_to_hex(&oid)); | |
937 | if (!(object->flags & CLIENT_SHALLOW)) { | |
938 | object->flags |= CLIENT_SHALLOW; | |
939 | add_object_array(object, NULL, shallows); | |
940 | } | |
941 | return 1; | |
942 | } | |
943 | ||
944 | return 0; | |
945 | } | |
946 | ||
947 | static int process_deepen(const char *line, int *depth) | |
948 | { | |
949 | const char *arg; | |
950 | if (skip_prefix(line, "deepen ", &arg)) { | |
951 | char *end = NULL; | |
952 | *depth = (int)strtol(arg, &end, 0); | |
953 | if (!end || *end || *depth <= 0) | |
954 | die("Invalid deepen: %s", line); | |
955 | return 1; | |
956 | } | |
957 | ||
958 | return 0; | |
959 | } | |
960 | ||
961 | static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list) | |
962 | { | |
963 | const char *arg; | |
964 | if (skip_prefix(line, "deepen-since ", &arg)) { | |
965 | char *end = NULL; | |
966 | *deepen_since = parse_timestamp(arg, &end, 0); | |
967 | if (!end || *end || !deepen_since || | |
968 | /* revisions.c's max_age -1 is special */ | |
969 | *deepen_since == -1) | |
970 | die("Invalid deepen-since: %s", line); | |
971 | *deepen_rev_list = 1; | |
972 | return 1; | |
973 | } | |
974 | return 0; | |
975 | } | |
976 | ||
977 | static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list) | |
978 | { | |
979 | const char *arg; | |
980 | if (skip_prefix(line, "deepen-not ", &arg)) { | |
981 | char *ref = NULL; | |
982 | struct object_id oid; | |
983 | if (expand_ref(the_repository, arg, strlen(arg), &oid, &ref) != 1) | |
984 | die("git upload-pack: ambiguous deepen-not: %s", line); | |
985 | string_list_append(deepen_not, ref); | |
986 | free(ref); | |
987 | *deepen_rev_list = 1; | |
988 | return 1; | |
989 | } | |
990 | return 0; | |
991 | } | |
992 | ||
993 | NORETURN __attribute__((format(printf,2,3))) | |
994 | static void send_err_and_die(struct upload_pack_data *data, | |
995 | const char *fmt, ...) | |
996 | { | |
997 | struct strbuf buf = STRBUF_INIT; | |
998 | va_list ap; | |
999 | ||
1000 | va_start(ap, fmt); | |
1001 | strbuf_vaddf(&buf, fmt, ap); | |
1002 | va_end(ap); | |
1003 | ||
1004 | packet_writer_error(&data->writer, "%s", buf.buf); | |
1005 | die("%s", buf.buf); | |
1006 | } | |
1007 | ||
1008 | static void check_one_filter(struct upload_pack_data *data, | |
1009 | struct list_objects_filter_options *opts) | |
1010 | { | |
1011 | const char *key = list_object_filter_config_name(opts->choice); | |
1012 | struct string_list_item *item = string_list_lookup(&data->allowed_filters, | |
1013 | key); | |
1014 | int allowed; | |
1015 | ||
1016 | if (item) | |
1017 | allowed = (intptr_t)item->util; | |
1018 | else | |
1019 | allowed = data->allow_filter_fallback; | |
1020 | ||
1021 | if (!allowed) | |
1022 | send_err_and_die(data, "filter '%s' not supported", key); | |
1023 | ||
1024 | if (opts->choice == LOFC_TREE_DEPTH && | |
1025 | opts->tree_exclude_depth > data->tree_filter_max_depth) | |
1026 | send_err_and_die(data, | |
1027 | "tree filter allows max depth %lu, but got %lu", | |
1028 | data->tree_filter_max_depth, | |
1029 | opts->tree_exclude_depth); | |
1030 | } | |
1031 | ||
1032 | static void check_filter_recurse(struct upload_pack_data *data, | |
1033 | struct list_objects_filter_options *opts) | |
1034 | { | |
1035 | size_t i; | |
1036 | ||
1037 | check_one_filter(data, opts); | |
1038 | if (opts->choice != LOFC_COMBINE) | |
1039 | return; | |
1040 | ||
1041 | for (i = 0; i < opts->sub_nr; i++) | |
1042 | check_filter_recurse(data, &opts->sub[i]); | |
1043 | } | |
1044 | ||
1045 | static void die_if_using_banned_filter(struct upload_pack_data *data) | |
1046 | { | |
1047 | check_filter_recurse(data, &data->filter_options); | |
1048 | } | |
1049 | ||
1050 | static void receive_needs(struct upload_pack_data *data, | |
1051 | struct packet_reader *reader) | |
1052 | { | |
1053 | int has_non_tip = 0; | |
1054 | ||
1055 | data->shallow_nr = 0; | |
1056 | for (;;) { | |
1057 | struct object *o; | |
1058 | const char *features; | |
1059 | struct object_id oid_buf; | |
1060 | const char *arg; | |
1061 | ||
1062 | reset_timeout(data->timeout); | |
1063 | if (packet_reader_read(reader) != PACKET_READ_NORMAL) | |
1064 | break; | |
1065 | ||
1066 | if (process_shallow(reader->line, &data->shallows)) | |
1067 | continue; | |
1068 | if (process_deepen(reader->line, &data->depth)) | |
1069 | continue; | |
1070 | if (process_deepen_since(reader->line, &data->deepen_since, &data->deepen_rev_list)) | |
1071 | continue; | |
1072 | if (process_deepen_not(reader->line, &data->deepen_not, &data->deepen_rev_list)) | |
1073 | continue; | |
1074 | ||
1075 | if (skip_prefix(reader->line, "filter ", &arg)) { | |
1076 | if (!data->filter_capability_requested) | |
1077 | die("git upload-pack: filtering capability not negotiated"); | |
1078 | list_objects_filter_die_if_populated(&data->filter_options); | |
1079 | parse_list_objects_filter(&data->filter_options, arg); | |
1080 | die_if_using_banned_filter(data); | |
1081 | continue; | |
1082 | } | |
1083 | ||
1084 | if (!skip_prefix(reader->line, "want ", &arg) || | |
1085 | parse_oid_hex(arg, &oid_buf, &features)) | |
1086 | die("git upload-pack: protocol error, " | |
1087 | "expected to get object ID, not '%s'", reader->line); | |
1088 | ||
1089 | if (parse_feature_request(features, "deepen-relative")) | |
1090 | data->deepen_relative = 1; | |
1091 | if (parse_feature_request(features, "multi_ack_detailed")) | |
1092 | data->multi_ack = MULTI_ACK_DETAILED; | |
1093 | else if (parse_feature_request(features, "multi_ack")) | |
1094 | data->multi_ack = MULTI_ACK; | |
1095 | if (parse_feature_request(features, "no-done")) | |
1096 | data->no_done = 1; | |
1097 | if (parse_feature_request(features, "thin-pack")) | |
1098 | data->use_thin_pack = 1; | |
1099 | if (parse_feature_request(features, "ofs-delta")) | |
1100 | data->use_ofs_delta = 1; | |
1101 | if (parse_feature_request(features, "side-band-64k")) | |
1102 | data->use_sideband = LARGE_PACKET_MAX; | |
1103 | else if (parse_feature_request(features, "side-band")) | |
1104 | data->use_sideband = DEFAULT_PACKET_MAX; | |
1105 | if (parse_feature_request(features, "no-progress")) | |
1106 | data->no_progress = 1; | |
1107 | if (parse_feature_request(features, "include-tag")) | |
1108 | data->use_include_tag = 1; | |
1109 | if (data->allow_filter && | |
1110 | parse_feature_request(features, "filter")) | |
1111 | data->filter_capability_requested = 1; | |
1112 | ||
1113 | o = parse_object(the_repository, &oid_buf); | |
1114 | if (!o) { | |
1115 | packet_writer_error(&data->writer, | |
1116 | "upload-pack: not our ref %s", | |
1117 | oid_to_hex(&oid_buf)); | |
1118 | die("git upload-pack: not our ref %s", | |
1119 | oid_to_hex(&oid_buf)); | |
1120 | } | |
1121 | if (!(o->flags & WANTED)) { | |
1122 | o->flags |= WANTED; | |
1123 | if (!((data->allow_uor & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1 | |
1124 | || is_our_ref(o, data->allow_uor))) | |
1125 | has_non_tip = 1; | |
1126 | add_object_array(o, NULL, &data->want_obj); | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | * We have sent all our refs already, and the other end | |
1132 | * should have chosen out of them. When we are operating | |
1133 | * in the stateless RPC mode, however, their choice may | |
1134 | * have been based on the set of older refs advertised | |
1135 | * by another process that handled the initial request. | |
1136 | */ | |
1137 | if (has_non_tip) | |
1138 | check_non_tip(data); | |
1139 | ||
1140 | if (!data->use_sideband && data->daemon_mode) | |
1141 | data->no_progress = 1; | |
1142 | ||
1143 | if (data->depth == 0 && !data->deepen_rev_list && data->shallows.nr == 0) | |
1144 | return; | |
1145 | ||
1146 | if (send_shallow_list(data)) | |
1147 | packet_flush(1); | |
1148 | } | |
1149 | ||
1150 | /* return non-zero if the ref is hidden, otherwise 0 */ | |
1151 | static int mark_our_ref(const char *refname, const char *refname_full, | |
1152 | const struct object_id *oid) | |
1153 | { | |
1154 | struct object *o = lookup_unknown_object(oid); | |
1155 | ||
1156 | if (ref_is_hidden(refname, refname_full)) { | |
1157 | o->flags |= HIDDEN_REF; | |
1158 | return 1; | |
1159 | } | |
1160 | o->flags |= OUR_REF; | |
1161 | return 0; | |
1162 | } | |
1163 | ||
1164 | static int check_ref(const char *refname_full, const struct object_id *oid, | |
1165 | int flag, void *cb_data) | |
1166 | { | |
1167 | const char *refname = strip_namespace(refname_full); | |
1168 | ||
1169 | mark_our_ref(refname, refname_full, oid); | |
1170 | return 0; | |
1171 | } | |
1172 | ||
1173 | static void format_symref_info(struct strbuf *buf, struct string_list *symref) | |
1174 | { | |
1175 | struct string_list_item *item; | |
1176 | ||
1177 | if (!symref->nr) | |
1178 | return; | |
1179 | for_each_string_list_item(item, symref) | |
1180 | strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util); | |
1181 | } | |
1182 | ||
1183 | static int send_ref(const char *refname, const struct object_id *oid, | |
1184 | int flag, void *cb_data) | |
1185 | { | |
1186 | static const char *capabilities = "multi_ack thin-pack side-band" | |
1187 | " side-band-64k ofs-delta shallow deepen-since deepen-not" | |
1188 | " deepen-relative no-progress include-tag multi_ack_detailed"; | |
1189 | const char *refname_nons = strip_namespace(refname); | |
1190 | struct object_id peeled; | |
1191 | struct upload_pack_data *data = cb_data; | |
1192 | ||
1193 | if (mark_our_ref(refname_nons, refname, oid)) | |
1194 | return 0; | |
1195 | ||
1196 | if (capabilities) { | |
1197 | struct strbuf symref_info = STRBUF_INIT; | |
1198 | ||
1199 | format_symref_info(&symref_info, &data->symref); | |
1200 | packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s object-format=%s agent=%s\n", | |
1201 | oid_to_hex(oid), refname_nons, | |
1202 | 0, capabilities, | |
1203 | (data->allow_uor & ALLOW_TIP_SHA1) ? | |
1204 | " allow-tip-sha1-in-want" : "", | |
1205 | (data->allow_uor & ALLOW_REACHABLE_SHA1) ? | |
1206 | " allow-reachable-sha1-in-want" : "", | |
1207 | data->stateless_rpc ? " no-done" : "", | |
1208 | symref_info.buf, | |
1209 | data->allow_filter ? " filter" : "", | |
1210 | the_hash_algo->name, | |
1211 | git_user_agent_sanitized()); | |
1212 | strbuf_release(&symref_info); | |
1213 | } else { | |
1214 | packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons); | |
1215 | } | |
1216 | capabilities = NULL; | |
1217 | if (!peel_ref(refname, &peeled)) | |
1218 | packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons); | |
1219 | return 0; | |
1220 | } | |
1221 | ||
1222 | static int find_symref(const char *refname, const struct object_id *oid, | |
1223 | int flag, void *cb_data) | |
1224 | { | |
1225 | const char *symref_target; | |
1226 | struct string_list_item *item; | |
1227 | ||
1228 | if ((flag & REF_ISSYMREF) == 0) | |
1229 | return 0; | |
1230 | symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag); | |
1231 | if (!symref_target || (flag & REF_ISSYMREF) == 0) | |
1232 | die("'%s' is a symref but it is not?", refname); | |
1233 | item = string_list_append(cb_data, strip_namespace(refname)); | |
1234 | item->util = xstrdup(strip_namespace(symref_target)); | |
1235 | return 0; | |
1236 | } | |
1237 | ||
1238 | static int parse_object_filter_config(const char *var, const char *value, | |
1239 | struct upload_pack_data *data) | |
1240 | { | |
1241 | struct strbuf buf = STRBUF_INIT; | |
1242 | const char *sub, *key; | |
1243 | size_t sub_len; | |
1244 | ||
1245 | if (parse_config_key(var, "uploadpackfilter", &sub, &sub_len, &key)) | |
1246 | return 0; | |
1247 | ||
1248 | if (!sub) { | |
1249 | if (!strcmp(key, "allow")) | |
1250 | data->allow_filter_fallback = git_config_bool(var, value); | |
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | strbuf_add(&buf, sub, sub_len); | |
1255 | ||
1256 | if (!strcmp(key, "allow")) | |
1257 | string_list_insert(&data->allowed_filters, buf.buf)->util = | |
1258 | (void *)(intptr_t)git_config_bool(var, value); | |
1259 | else if (!strcmp(buf.buf, "tree") && !strcmp(key, "maxdepth")) { | |
1260 | if (!value) { | |
1261 | strbuf_release(&buf); | |
1262 | return config_error_nonbool(var); | |
1263 | } | |
1264 | string_list_insert(&data->allowed_filters, buf.buf)->util = | |
1265 | (void *)(intptr_t)1; | |
1266 | data->tree_filter_max_depth = git_config_ulong(var, value); | |
1267 | } | |
1268 | ||
1269 | strbuf_release(&buf); | |
1270 | return 0; | |
1271 | } | |
1272 | ||
1273 | static int upload_pack_config(const char *var, const char *value, void *cb_data) | |
1274 | { | |
1275 | struct upload_pack_data *data = cb_data; | |
1276 | ||
1277 | if (!strcmp("uploadpack.allowtipsha1inwant", var)) { | |
1278 | if (git_config_bool(var, value)) | |
1279 | data->allow_uor |= ALLOW_TIP_SHA1; | |
1280 | else | |
1281 | data->allow_uor &= ~ALLOW_TIP_SHA1; | |
1282 | } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) { | |
1283 | if (git_config_bool(var, value)) | |
1284 | data->allow_uor |= ALLOW_REACHABLE_SHA1; | |
1285 | else | |
1286 | data->allow_uor &= ~ALLOW_REACHABLE_SHA1; | |
1287 | } else if (!strcmp("uploadpack.allowanysha1inwant", var)) { | |
1288 | if (git_config_bool(var, value)) | |
1289 | data->allow_uor |= ALLOW_ANY_SHA1; | |
1290 | else | |
1291 | data->allow_uor &= ~ALLOW_ANY_SHA1; | |
1292 | } else if (!strcmp("uploadpack.keepalive", var)) { | |
1293 | data->keepalive = git_config_int(var, value); | |
1294 | if (!data->keepalive) | |
1295 | data->keepalive = -1; | |
1296 | } else if (!strcmp("uploadpack.allowfilter", var)) { | |
1297 | data->allow_filter = git_config_bool(var, value); | |
1298 | } else if (!strcmp("uploadpack.allowrefinwant", var)) { | |
1299 | data->allow_ref_in_want = git_config_bool(var, value); | |
1300 | } else if (!strcmp("uploadpack.allowsidebandall", var)) { | |
1301 | data->allow_sideband_all = git_config_bool(var, value); | |
1302 | } else if (!strcmp("core.precomposeunicode", var)) { | |
1303 | precomposed_unicode = git_config_bool(var, value); | |
1304 | } | |
1305 | ||
1306 | if (current_config_scope() != CONFIG_SCOPE_LOCAL && | |
1307 | current_config_scope() != CONFIG_SCOPE_WORKTREE) { | |
1308 | if (!strcmp("uploadpack.packobjectshook", var)) | |
1309 | return git_config_string(&data->pack_objects_hook, var, value); | |
1310 | } | |
1311 | ||
1312 | parse_object_filter_config(var, value, data); | |
1313 | ||
1314 | return parse_hide_refs_config(var, value, "uploadpack"); | |
1315 | } | |
1316 | ||
1317 | void upload_pack(struct upload_pack_options *options) | |
1318 | { | |
1319 | struct packet_reader reader; | |
1320 | struct upload_pack_data data; | |
1321 | ||
1322 | upload_pack_data_init(&data); | |
1323 | ||
1324 | git_config(upload_pack_config, &data); | |
1325 | ||
1326 | data.stateless_rpc = options->stateless_rpc; | |
1327 | data.daemon_mode = options->daemon_mode; | |
1328 | data.timeout = options->timeout; | |
1329 | ||
1330 | head_ref_namespaced(find_symref, &data.symref); | |
1331 | ||
1332 | if (options->advertise_refs || !data.stateless_rpc) { | |
1333 | reset_timeout(data.timeout); | |
1334 | head_ref_namespaced(send_ref, &data); | |
1335 | for_each_namespaced_ref(send_ref, &data); | |
1336 | advertise_shallow_grafts(1); | |
1337 | packet_flush(1); | |
1338 | } else { | |
1339 | head_ref_namespaced(check_ref, NULL); | |
1340 | for_each_namespaced_ref(check_ref, NULL); | |
1341 | } | |
1342 | ||
1343 | if (!options->advertise_refs) { | |
1344 | packet_reader_init(&reader, 0, NULL, 0, | |
1345 | PACKET_READ_CHOMP_NEWLINE | | |
1346 | PACKET_READ_DIE_ON_ERR_PACKET); | |
1347 | ||
1348 | receive_needs(&data, &reader); | |
1349 | if (data.want_obj.nr) { | |
1350 | get_common_commits(&data, &reader); | |
1351 | create_pack_file(&data, NULL); | |
1352 | } | |
1353 | } | |
1354 | ||
1355 | upload_pack_data_clear(&data); | |
1356 | } | |
1357 | ||
1358 | static int parse_want(struct packet_writer *writer, const char *line, | |
1359 | struct object_array *want_obj) | |
1360 | { | |
1361 | const char *arg; | |
1362 | if (skip_prefix(line, "want ", &arg)) { | |
1363 | struct object_id oid; | |
1364 | struct object *o; | |
1365 | ||
1366 | if (get_oid_hex(arg, &oid)) | |
1367 | die("git upload-pack: protocol error, " | |
1368 | "expected to get oid, not '%s'", line); | |
1369 | ||
1370 | o = parse_object(the_repository, &oid); | |
1371 | if (!o) { | |
1372 | packet_writer_error(writer, | |
1373 | "upload-pack: not our ref %s", | |
1374 | oid_to_hex(&oid)); | |
1375 | die("git upload-pack: not our ref %s", | |
1376 | oid_to_hex(&oid)); | |
1377 | } | |
1378 | ||
1379 | if (!(o->flags & WANTED)) { | |
1380 | o->flags |= WANTED; | |
1381 | add_object_array(o, NULL, want_obj); | |
1382 | } | |
1383 | ||
1384 | return 1; | |
1385 | } | |
1386 | ||
1387 | return 0; | |
1388 | } | |
1389 | ||
1390 | static int parse_want_ref(struct packet_writer *writer, const char *line, | |
1391 | struct string_list *wanted_refs, | |
1392 | struct object_array *want_obj) | |
1393 | { | |
1394 | const char *arg; | |
1395 | if (skip_prefix(line, "want-ref ", &arg)) { | |
1396 | struct object_id oid; | |
1397 | struct string_list_item *item; | |
1398 | struct object *o; | |
1399 | ||
1400 | if (read_ref(arg, &oid)) { | |
1401 | packet_writer_error(writer, "unknown ref %s", arg); | |
1402 | die("unknown ref %s", arg); | |
1403 | } | |
1404 | ||
1405 | item = string_list_append(wanted_refs, arg); | |
1406 | item->util = oiddup(&oid); | |
1407 | ||
1408 | o = parse_object_or_die(&oid, arg); | |
1409 | if (!(o->flags & WANTED)) { | |
1410 | o->flags |= WANTED; | |
1411 | add_object_array(o, NULL, want_obj); | |
1412 | } | |
1413 | ||
1414 | return 1; | |
1415 | } | |
1416 | ||
1417 | return 0; | |
1418 | } | |
1419 | ||
1420 | static int parse_have(const char *line, struct oid_array *haves) | |
1421 | { | |
1422 | const char *arg; | |
1423 | if (skip_prefix(line, "have ", &arg)) { | |
1424 | struct object_id oid; | |
1425 | ||
1426 | if (get_oid_hex(arg, &oid)) | |
1427 | die("git upload-pack: expected SHA1 object, got '%s'", arg); | |
1428 | oid_array_append(haves, &oid); | |
1429 | return 1; | |
1430 | } | |
1431 | ||
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | static void process_args(struct packet_reader *request, | |
1436 | struct upload_pack_data *data) | |
1437 | { | |
1438 | while (packet_reader_read(request) == PACKET_READ_NORMAL) { | |
1439 | const char *arg = request->line; | |
1440 | const char *p; | |
1441 | ||
1442 | /* process want */ | |
1443 | if (parse_want(&data->writer, arg, &data->want_obj)) | |
1444 | continue; | |
1445 | if (data->allow_ref_in_want && | |
1446 | parse_want_ref(&data->writer, arg, &data->wanted_refs, | |
1447 | &data->want_obj)) | |
1448 | continue; | |
1449 | /* process have line */ | |
1450 | if (parse_have(arg, &data->haves)) | |
1451 | continue; | |
1452 | ||
1453 | /* process args like thin-pack */ | |
1454 | if (!strcmp(arg, "thin-pack")) { | |
1455 | data->use_thin_pack = 1; | |
1456 | continue; | |
1457 | } | |
1458 | if (!strcmp(arg, "ofs-delta")) { | |
1459 | data->use_ofs_delta = 1; | |
1460 | continue; | |
1461 | } | |
1462 | if (!strcmp(arg, "no-progress")) { | |
1463 | data->no_progress = 1; | |
1464 | continue; | |
1465 | } | |
1466 | if (!strcmp(arg, "include-tag")) { | |
1467 | data->use_include_tag = 1; | |
1468 | continue; | |
1469 | } | |
1470 | if (!strcmp(arg, "done")) { | |
1471 | data->done = 1; | |
1472 | continue; | |
1473 | } | |
1474 | ||
1475 | /* Shallow related arguments */ | |
1476 | if (process_shallow(arg, &data->shallows)) | |
1477 | continue; | |
1478 | if (process_deepen(arg, &data->depth)) | |
1479 | continue; | |
1480 | if (process_deepen_since(arg, &data->deepen_since, | |
1481 | &data->deepen_rev_list)) | |
1482 | continue; | |
1483 | if (process_deepen_not(arg, &data->deepen_not, | |
1484 | &data->deepen_rev_list)) | |
1485 | continue; | |
1486 | if (!strcmp(arg, "deepen-relative")) { | |
1487 | data->deepen_relative = 1; | |
1488 | continue; | |
1489 | } | |
1490 | ||
1491 | if (data->allow_filter && skip_prefix(arg, "filter ", &p)) { | |
1492 | list_objects_filter_die_if_populated(&data->filter_options); | |
1493 | parse_list_objects_filter(&data->filter_options, p); | |
1494 | die_if_using_banned_filter(data); | |
1495 | continue; | |
1496 | } | |
1497 | ||
1498 | if ((git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) || | |
1499 | data->allow_sideband_all) && | |
1500 | !strcmp(arg, "sideband-all")) { | |
1501 | data->writer.use_sideband = 1; | |
1502 | continue; | |
1503 | } | |
1504 | ||
1505 | if (skip_prefix(arg, "packfile-uris ", &p)) { | |
1506 | string_list_split(&data->uri_protocols, p, ',', -1); | |
1507 | continue; | |
1508 | } | |
1509 | ||
1510 | /* ignore unknown lines maybe? */ | |
1511 | die("unexpected line: '%s'", arg); | |
1512 | } | |
1513 | ||
1514 | if (data->uri_protocols.nr && !data->writer.use_sideband) | |
1515 | string_list_clear(&data->uri_protocols, 0); | |
1516 | ||
1517 | if (request->status != PACKET_READ_FLUSH) | |
1518 | die(_("expected flush after fetch arguments")); | |
1519 | } | |
1520 | ||
1521 | static int process_haves(struct upload_pack_data *data, struct oid_array *common) | |
1522 | { | |
1523 | int i; | |
1524 | ||
1525 | /* Process haves */ | |
1526 | for (i = 0; i < data->haves.nr; i++) { | |
1527 | const struct object_id *oid = &data->haves.oid[i]; | |
1528 | ||
1529 | if (!has_object_file_with_flags(oid, | |
1530 | OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT)) | |
1531 | continue; | |
1532 | ||
1533 | oid_array_append(common, oid); | |
1534 | ||
1535 | do_got_oid(data, oid); | |
1536 | } | |
1537 | ||
1538 | return 0; | |
1539 | } | |
1540 | ||
1541 | static int send_acks(struct upload_pack_data *data, struct oid_array *acks) | |
1542 | { | |
1543 | int i; | |
1544 | ||
1545 | packet_writer_write(&data->writer, "acknowledgments\n"); | |
1546 | ||
1547 | /* Send Acks */ | |
1548 | if (!acks->nr) | |
1549 | packet_writer_write(&data->writer, "NAK\n"); | |
1550 | ||
1551 | for (i = 0; i < acks->nr; i++) { | |
1552 | packet_writer_write(&data->writer, "ACK %s\n", | |
1553 | oid_to_hex(&acks->oid[i])); | |
1554 | } | |
1555 | ||
1556 | if (ok_to_give_up(data)) { | |
1557 | /* Send Ready */ | |
1558 | packet_writer_write(&data->writer, "ready\n"); | |
1559 | return 1; | |
1560 | } | |
1561 | ||
1562 | return 0; | |
1563 | } | |
1564 | ||
1565 | static int process_haves_and_send_acks(struct upload_pack_data *data) | |
1566 | { | |
1567 | struct oid_array common = OID_ARRAY_INIT; | |
1568 | int ret = 0; | |
1569 | ||
1570 | process_haves(data, &common); | |
1571 | if (data->done) { | |
1572 | ret = 1; | |
1573 | } else if (send_acks(data, &common)) { | |
1574 | packet_writer_delim(&data->writer); | |
1575 | ret = 1; | |
1576 | } else { | |
1577 | /* Add Flush */ | |
1578 | packet_writer_flush(&data->writer); | |
1579 | ret = 0; | |
1580 | } | |
1581 | ||
1582 | oid_array_clear(&data->haves); | |
1583 | oid_array_clear(&common); | |
1584 | return ret; | |
1585 | } | |
1586 | ||
1587 | static void send_wanted_ref_info(struct upload_pack_data *data) | |
1588 | { | |
1589 | const struct string_list_item *item; | |
1590 | ||
1591 | if (!data->wanted_refs.nr) | |
1592 | return; | |
1593 | ||
1594 | packet_writer_write(&data->writer, "wanted-refs\n"); | |
1595 | ||
1596 | for_each_string_list_item(item, &data->wanted_refs) { | |
1597 | packet_writer_write(&data->writer, "%s %s\n", | |
1598 | oid_to_hex(item->util), | |
1599 | item->string); | |
1600 | } | |
1601 | ||
1602 | packet_writer_delim(&data->writer); | |
1603 | } | |
1604 | ||
1605 | static void send_shallow_info(struct upload_pack_data *data) | |
1606 | { | |
1607 | /* No shallow info needs to be sent */ | |
1608 | if (!data->depth && !data->deepen_rev_list && !data->shallows.nr && | |
1609 | !is_repository_shallow(the_repository)) | |
1610 | return; | |
1611 | ||
1612 | packet_writer_write(&data->writer, "shallow-info\n"); | |
1613 | ||
1614 | if (!send_shallow_list(data) && | |
1615 | is_repository_shallow(the_repository)) | |
1616 | deepen(data, INFINITE_DEPTH); | |
1617 | ||
1618 | packet_delim(1); | |
1619 | } | |
1620 | ||
1621 | enum fetch_state { | |
1622 | FETCH_PROCESS_ARGS = 0, | |
1623 | FETCH_SEND_ACKS, | |
1624 | FETCH_SEND_PACK, | |
1625 | FETCH_DONE, | |
1626 | }; | |
1627 | ||
1628 | int upload_pack_v2(struct repository *r, struct strvec *keys, | |
1629 | struct packet_reader *request) | |
1630 | { | |
1631 | enum fetch_state state = FETCH_PROCESS_ARGS; | |
1632 | struct upload_pack_data data; | |
1633 | ||
1634 | clear_object_flags(ALL_FLAGS); | |
1635 | ||
1636 | upload_pack_data_init(&data); | |
1637 | data.use_sideband = LARGE_PACKET_MAX; | |
1638 | ||
1639 | git_config(upload_pack_config, &data); | |
1640 | ||
1641 | while (state != FETCH_DONE) { | |
1642 | switch (state) { | |
1643 | case FETCH_PROCESS_ARGS: | |
1644 | process_args(request, &data); | |
1645 | ||
1646 | if (!data.want_obj.nr) { | |
1647 | /* | |
1648 | * Request didn't contain any 'want' lines, | |
1649 | * guess they didn't want anything. | |
1650 | */ | |
1651 | state = FETCH_DONE; | |
1652 | } else if (data.haves.nr) { | |
1653 | /* | |
1654 | * Request had 'have' lines, so lets ACK them. | |
1655 | */ | |
1656 | state = FETCH_SEND_ACKS; | |
1657 | } else { | |
1658 | /* | |
1659 | * Request had 'want's but no 'have's so we can | |
1660 | * immedietly go to construct and send a pack. | |
1661 | */ | |
1662 | state = FETCH_SEND_PACK; | |
1663 | } | |
1664 | break; | |
1665 | case FETCH_SEND_ACKS: | |
1666 | if (process_haves_and_send_acks(&data)) | |
1667 | state = FETCH_SEND_PACK; | |
1668 | else | |
1669 | state = FETCH_DONE; | |
1670 | break; | |
1671 | case FETCH_SEND_PACK: | |
1672 | send_wanted_ref_info(&data); | |
1673 | send_shallow_info(&data); | |
1674 | ||
1675 | if (data.uri_protocols.nr) { | |
1676 | create_pack_file(&data, &data.uri_protocols); | |
1677 | } else { | |
1678 | packet_writer_write(&data.writer, "packfile\n"); | |
1679 | create_pack_file(&data, NULL); | |
1680 | } | |
1681 | state = FETCH_DONE; | |
1682 | break; | |
1683 | case FETCH_DONE: | |
1684 | continue; | |
1685 | } | |
1686 | } | |
1687 | ||
1688 | upload_pack_data_clear(&data); | |
1689 | return 0; | |
1690 | } | |
1691 | ||
1692 | int upload_pack_advertise(struct repository *r, | |
1693 | struct strbuf *value) | |
1694 | { | |
1695 | if (value) { | |
1696 | int allow_filter_value; | |
1697 | int allow_ref_in_want; | |
1698 | int allow_sideband_all_value; | |
1699 | char *str = NULL; | |
1700 | ||
1701 | strbuf_addstr(value, "shallow"); | |
1702 | ||
1703 | if (!repo_config_get_bool(the_repository, | |
1704 | "uploadpack.allowfilter", | |
1705 | &allow_filter_value) && | |
1706 | allow_filter_value) | |
1707 | strbuf_addstr(value, " filter"); | |
1708 | ||
1709 | if (!repo_config_get_bool(the_repository, | |
1710 | "uploadpack.allowrefinwant", | |
1711 | &allow_ref_in_want) && | |
1712 | allow_ref_in_want) | |
1713 | strbuf_addstr(value, " ref-in-want"); | |
1714 | ||
1715 | if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) || | |
1716 | (!repo_config_get_bool(the_repository, | |
1717 | "uploadpack.allowsidebandall", | |
1718 | &allow_sideband_all_value) && | |
1719 | allow_sideband_all_value)) | |
1720 | strbuf_addstr(value, " sideband-all"); | |
1721 | ||
1722 | if (!repo_config_get_string(the_repository, | |
1723 | "uploadpack.blobpackfileuri", | |
1724 | &str) && | |
1725 | str) { | |
1726 | strbuf_addstr(value, " packfile-uris"); | |
1727 | free(str); | |
1728 | } | |
1729 | } | |
1730 | ||
1731 | return 1; | |
1732 | } |