| 1 | #define USE_THE_REPOSITORY_VARIABLE |
| 2 | #define DISABLE_SIGN_COMPARE_WARNINGS |
| 3 | |
| 4 | #include "git-compat-util.h" |
| 5 | #include "config.h" |
| 6 | #include "environment.h" |
| 7 | #include "gettext.h" |
| 8 | #include "hex.h" |
| 9 | #include "refs.h" |
| 10 | #include "pkt-line.h" |
| 11 | #include "sideband.h" |
| 12 | #include "repository.h" |
| 13 | #include "odb.h" |
| 14 | #include "oid-array.h" |
| 15 | #include "object.h" |
| 16 | #include "commit.h" |
| 17 | #include "diff.h" |
| 18 | #include "revision.h" |
| 19 | #include "list-objects-filter-options.h" |
| 20 | #include "run-command.h" |
| 21 | #include "connect.h" |
| 22 | #include "sigchain.h" |
| 23 | #include "version.h" |
| 24 | #include "string-list.h" |
| 25 | #include "strvec.h" |
| 26 | #include "trace2.h" |
| 27 | #include "protocol.h" |
| 28 | #include "upload-pack.h" |
| 29 | #include "commit-graph.h" |
| 30 | #include "commit-reach.h" |
| 31 | #include "shallow.h" |
| 32 | #include "trace.h" |
| 33 | #include "write-or-die.h" |
| 34 | #include "json-writer.h" |
| 35 | #include "strmap.h" |
| 36 | #include "promisor-remote.h" |
| 37 | |
| 38 | /* Remember to update object flag allocation in object.h */ |
| 39 | #define THEY_HAVE (1u << 11) |
| 40 | #define OUR_REF (1u << 12) |
| 41 | #define WANTED (1u << 13) |
| 42 | #define COMMON_KNOWN (1u << 14) |
| 43 | |
| 44 | #define SHALLOW (1u << 16) |
| 45 | #define NOT_SHALLOW (1u << 17) |
| 46 | #define CLIENT_SHALLOW (1u << 18) |
| 47 | #define HIDDEN_REF (1u << 19) |
| 48 | |
| 49 | #define ALL_FLAGS (THEY_HAVE | OUR_REF | WANTED | COMMON_KNOWN | SHALLOW | \ |
| 50 | NOT_SHALLOW | CLIENT_SHALLOW | HIDDEN_REF) |
| 51 | |
| 52 | /* Enum for allowed unadvertised object request (UOR) */ |
| 53 | enum allow_uor { |
| 54 | /* Allow specifying sha1 if it is a ref tip. */ |
| 55 | ALLOW_TIP_SHA1 = 0x01, |
| 56 | /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */ |
| 57 | ALLOW_REACHABLE_SHA1 = 0x02, |
| 58 | /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */ |
| 59 | ALLOW_ANY_SHA1 = 0x07 |
| 60 | }; |
| 61 | |
| 62 | /* |
| 63 | * Please annotate, and if possible group together, fields used only |
| 64 | * for protocol v0 or only for protocol v2. |
| 65 | */ |
| 66 | struct upload_pack_data { |
| 67 | struct string_list symref; /* v0 only */ |
| 68 | struct object_array want_obj; |
| 69 | struct object_array have_obj; |
| 70 | struct strmap wanted_refs; /* v2 only */ |
| 71 | struct strvec hidden_refs; |
| 72 | |
| 73 | struct object_array shallows; |
| 74 | struct oidset deepen_not; |
| 75 | struct object_array extra_edge_obj; |
| 76 | int depth; |
| 77 | timestamp_t deepen_since; |
| 78 | int deepen_rev_list; |
| 79 | int deepen_relative; |
| 80 | int keepalive; |
| 81 | int shallow_nr; |
| 82 | timestamp_t oldest_have; |
| 83 | |
| 84 | unsigned int timeout; /* v0 only */ |
| 85 | enum { |
| 86 | NO_MULTI_ACK = 0, |
| 87 | MULTI_ACK = 1, |
| 88 | MULTI_ACK_DETAILED = 2 |
| 89 | } multi_ack; /* v0 only */ |
| 90 | |
| 91 | /* 0 for no sideband, otherwise DEFAULT_PACKET_MAX or LARGE_PACKET_MAX */ |
| 92 | int use_sideband; |
| 93 | |
| 94 | struct string_list uri_protocols; |
| 95 | enum allow_uor allow_uor; |
| 96 | |
| 97 | struct list_objects_filter_options filter_options; |
| 98 | struct string_list allowed_filters; |
| 99 | |
| 100 | struct packet_writer writer; |
| 101 | |
| 102 | char *pack_objects_hook; |
| 103 | |
| 104 | unsigned stateless_rpc : 1; /* v0 only */ |
| 105 | unsigned no_done : 1; /* v0 only */ |
| 106 | unsigned daemon_mode : 1; /* v0 only */ |
| 107 | unsigned filter_capability_requested : 1; /* v0 only */ |
| 108 | |
| 109 | unsigned use_thin_pack : 1; |
| 110 | unsigned use_ofs_delta : 1; |
| 111 | unsigned no_progress : 1; |
| 112 | unsigned use_include_tag : 1; |
| 113 | unsigned wait_for_done : 1; |
| 114 | unsigned allow_filter : 1; |
| 115 | unsigned allow_filter_fallback : 1; |
| 116 | unsigned long tree_filter_max_depth; |
| 117 | |
| 118 | unsigned done : 1; /* v2 only */ |
| 119 | unsigned allow_ref_in_want : 1; /* v2 only */ |
| 120 | unsigned allow_sideband_all : 1; /* v2 only */ |
| 121 | unsigned seen_haves : 1; /* v2 only */ |
| 122 | unsigned allow_packfile_uris : 1; /* v2 only */ |
| 123 | unsigned advertise_sid : 1; |
| 124 | unsigned sent_capabilities : 1; |
| 125 | }; |
| 126 | |
| 127 | static void upload_pack_data_init(struct upload_pack_data *data) |
| 128 | { |
| 129 | struct string_list symref = STRING_LIST_INIT_DUP; |
| 130 | struct strmap wanted_refs = STRMAP_INIT; |
| 131 | struct strvec hidden_refs = STRVEC_INIT; |
| 132 | struct object_array want_obj = OBJECT_ARRAY_INIT; |
| 133 | struct object_array have_obj = OBJECT_ARRAY_INIT; |
| 134 | struct object_array shallows = OBJECT_ARRAY_INIT; |
| 135 | struct oidset deepen_not = OID_ARRAY_INIT; |
| 136 | struct string_list uri_protocols = STRING_LIST_INIT_DUP; |
| 137 | struct object_array extra_edge_obj = OBJECT_ARRAY_INIT; |
| 138 | struct string_list allowed_filters = STRING_LIST_INIT_DUP; |
| 139 | |
| 140 | memset(data, 0, sizeof(*data)); |
| 141 | data->symref = symref; |
| 142 | data->wanted_refs = wanted_refs; |
| 143 | data->hidden_refs = hidden_refs; |
| 144 | data->want_obj = want_obj; |
| 145 | data->have_obj = have_obj; |
| 146 | data->shallows = shallows; |
| 147 | data->deepen_not = deepen_not; |
| 148 | data->uri_protocols = uri_protocols; |
| 149 | data->extra_edge_obj = extra_edge_obj; |
| 150 | data->allowed_filters = allowed_filters; |
| 151 | data->allow_filter_fallback = 1; |
| 152 | data->tree_filter_max_depth = ULONG_MAX; |
| 153 | packet_writer_init(&data->writer, 1); |
| 154 | list_objects_filter_init(&data->filter_options); |
| 155 | |
| 156 | data->keepalive = 5; |
| 157 | data->advertise_sid = 0; |
| 158 | } |
| 159 | |
| 160 | static void upload_pack_data_clear(struct upload_pack_data *data) |
| 161 | { |
| 162 | string_list_clear(&data->symref, 1); |
| 163 | strmap_clear(&data->wanted_refs, 1); |
| 164 | strvec_clear(&data->hidden_refs); |
| 165 | object_array_clear(&data->want_obj); |
| 166 | object_array_clear(&data->have_obj); |
| 167 | object_array_clear(&data->shallows); |
| 168 | oidset_clear(&data->deepen_not); |
| 169 | object_array_clear(&data->extra_edge_obj); |
| 170 | list_objects_filter_release(&data->filter_options); |
| 171 | string_list_clear(&data->allowed_filters, 0); |
| 172 | string_list_clear(&data->uri_protocols, 0); |
| 173 | |
| 174 | free((char *)data->pack_objects_hook); |
| 175 | } |
| 176 | |
| 177 | static void reset_timeout(unsigned int timeout) |
| 178 | { |
| 179 | alarm(timeout); |
| 180 | } |
| 181 | |
| 182 | static void send_client_data(int fd, const char *data, ssize_t sz, |
| 183 | int use_sideband) |
| 184 | { |
| 185 | if (use_sideband) { |
| 186 | send_sideband(1, fd, data, sz, use_sideband); |
| 187 | return; |
| 188 | } |
| 189 | if (fd == 3) |
| 190 | /* emergency quit */ |
| 191 | fd = 2; |
| 192 | if (fd == 2) { |
| 193 | /* XXX: are we happy to lose stuff here? */ |
| 194 | xwrite(fd, data, sz); |
| 195 | return; |
| 196 | } |
| 197 | write_or_die(fd, data, sz); |
| 198 | } |
| 199 | |
| 200 | static int write_one_shallow(const struct commit_graft *graft, void *cb_data) |
| 201 | { |
| 202 | FILE *fp = cb_data; |
| 203 | if (graft->nr_parent == -1) |
| 204 | fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid)); |
| 205 | return 0; |
| 206 | } |
| 207 | |
| 208 | struct output_state { |
| 209 | /* |
| 210 | * We do writes no bigger than LARGE_PACKET_DATA_MAX - 1, because with |
| 211 | * sideband-64k the band designator takes up 1 byte of space. Because |
| 212 | * relay_pack_data keeps the last byte to itself, we make the buffer 1 |
| 213 | * byte bigger than the intended maximum write size. |
| 214 | */ |
| 215 | char buffer[(LARGE_PACKET_DATA_MAX - 1) + 1]; |
| 216 | int used; |
| 217 | unsigned packfile_uris_started : 1; |
| 218 | unsigned packfile_started : 1; |
| 219 | }; |
| 220 | |
| 221 | static int relay_pack_data(int pack_objects_out, struct output_state *os, |
| 222 | int use_sideband, int write_packfile_line, |
| 223 | bool *did_send_data) |
| 224 | { |
| 225 | /* |
| 226 | * We keep the last byte to ourselves |
| 227 | * in case we detect broken rev-list, so that we |
| 228 | * can leave the stream corrupted. This is |
| 229 | * unfortunate -- unpack-objects would happily |
| 230 | * accept a valid packdata with trailing garbage, |
| 231 | * so appending garbage after we pass all the |
| 232 | * pack data is not good enough to signal |
| 233 | * breakage to downstream. |
| 234 | */ |
| 235 | ssize_t readsz; |
| 236 | |
| 237 | *did_send_data = false; |
| 238 | |
| 239 | readsz = xread(pack_objects_out, os->buffer + os->used, |
| 240 | sizeof(os->buffer) - os->used); |
| 241 | if (readsz < 0) { |
| 242 | return readsz; |
| 243 | } |
| 244 | os->used += readsz; |
| 245 | |
| 246 | while (!os->packfile_started) { |
| 247 | char *p; |
| 248 | if (os->used >= 4 && !memcmp(os->buffer, "PACK", 4)) { |
| 249 | os->packfile_started = 1; |
| 250 | if (write_packfile_line) { |
| 251 | if (os->packfile_uris_started) |
| 252 | packet_delim(1); |
| 253 | packet_write_fmt(1, "\1packfile\n"); |
| 254 | *did_send_data = true; |
| 255 | } |
| 256 | break; |
| 257 | } |
| 258 | if ((p = memchr(os->buffer, '\n', os->used))) { |
| 259 | if (!os->packfile_uris_started) { |
| 260 | os->packfile_uris_started = 1; |
| 261 | if (!write_packfile_line) |
| 262 | BUG("packfile_uris requires sideband-all"); |
| 263 | packet_write_fmt(1, "\1packfile-uris\n"); |
| 264 | } |
| 265 | *p = '\0'; |
| 266 | packet_write_fmt(1, "\1%s\n", os->buffer); |
| 267 | *did_send_data = true; |
| 268 | |
| 269 | os->used -= p - os->buffer + 1; |
| 270 | memmove(os->buffer, p + 1, os->used); |
| 271 | } else { |
| 272 | /* |
| 273 | * Incomplete line. |
| 274 | */ |
| 275 | return readsz; |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | /* |
| 280 | * Make sure that we buffer some data before sending it to the client. |
| 281 | * This significantly reduces the number of write(3p) syscalls. |
| 282 | */ |
| 283 | if (readsz && os->used < (sizeof(os->buffer) * 2 / 3)) |
| 284 | return readsz; |
| 285 | |
| 286 | if (os->used > 1) { |
| 287 | send_client_data(1, os->buffer, os->used - 1, use_sideband); |
| 288 | os->buffer[0] = os->buffer[os->used - 1]; |
| 289 | os->used = 1; |
| 290 | } else { |
| 291 | send_client_data(1, os->buffer, os->used, use_sideband); |
| 292 | os->used = 0; |
| 293 | } |
| 294 | |
| 295 | *did_send_data = true; |
| 296 | return readsz; |
| 297 | } |
| 298 | |
| 299 | static void create_pack_file(struct upload_pack_data *pack_data, |
| 300 | const struct string_list *uri_protocols) |
| 301 | { |
| 302 | struct child_process pack_objects = CHILD_PROCESS_INIT; |
| 303 | struct output_state *output_state = xcalloc(1, sizeof(struct output_state)); |
| 304 | char progress[128]; |
| 305 | char abort_msg[] = "aborting due to possible repository " |
| 306 | "corruption on the remote side."; |
| 307 | uint64_t last_sent_ms = 0; |
| 308 | ssize_t sz; |
| 309 | int i; |
| 310 | FILE *pipe_fd; |
| 311 | |
| 312 | if (!pack_data->pack_objects_hook) |
| 313 | pack_objects.git_cmd = 1; |
| 314 | else { |
| 315 | strvec_push(&pack_objects.args, pack_data->pack_objects_hook); |
| 316 | strvec_push(&pack_objects.args, "git"); |
| 317 | pack_objects.use_shell = 1; |
| 318 | } |
| 319 | |
| 320 | if (pack_data->shallow_nr) { |
| 321 | strvec_push(&pack_objects.args, "--shallow-file"); |
| 322 | strvec_push(&pack_objects.args, ""); |
| 323 | } |
| 324 | strvec_push(&pack_objects.args, "pack-objects"); |
| 325 | strvec_push(&pack_objects.args, "--revs"); |
| 326 | if (pack_data->use_thin_pack) |
| 327 | strvec_push(&pack_objects.args, "--thin"); |
| 328 | |
| 329 | strvec_push(&pack_objects.args, "--stdout"); |
| 330 | if (pack_data->shallow_nr) |
| 331 | strvec_push(&pack_objects.args, "--shallow"); |
| 332 | if (!pack_data->no_progress) |
| 333 | strvec_push(&pack_objects.args, "--progress"); |
| 334 | if (pack_data->use_ofs_delta) |
| 335 | strvec_push(&pack_objects.args, "--delta-base-offset"); |
| 336 | if (pack_data->use_include_tag) |
| 337 | strvec_push(&pack_objects.args, "--include-tag"); |
| 338 | if (repo_has_accepted_promisor_remote(the_repository)) |
| 339 | strvec_push(&pack_objects.args, "--missing=allow-promisor"); |
| 340 | if (pack_data->filter_options.choice) { |
| 341 | const char *spec = |
| 342 | expand_list_objects_filter_spec(&pack_data->filter_options); |
| 343 | strvec_pushf(&pack_objects.args, "--filter=%s", spec); |
| 344 | } |
| 345 | if (uri_protocols) { |
| 346 | for (i = 0; i < uri_protocols->nr; i++) |
| 347 | strvec_pushf(&pack_objects.args, "--uri-protocol=%s", |
| 348 | uri_protocols->items[i].string); |
| 349 | } |
| 350 | |
| 351 | pack_objects.in = -1; |
| 352 | pack_objects.out = -1; |
| 353 | pack_objects.err = -1; |
| 354 | pack_objects.clean_on_exit = 1; |
| 355 | |
| 356 | if (start_command(&pack_objects)) |
| 357 | die("git upload-pack: unable to fork git-pack-objects"); |
| 358 | |
| 359 | pipe_fd = xfdopen(pack_objects.in, "w"); |
| 360 | |
| 361 | if (pack_data->shallow_nr) |
| 362 | for_each_commit_graft(write_one_shallow, pipe_fd); |
| 363 | |
| 364 | for (i = 0; i < pack_data->want_obj.nr; i++) |
| 365 | fprintf(pipe_fd, "%s\n", |
| 366 | oid_to_hex(&pack_data->want_obj.objects[i].item->oid)); |
| 367 | fprintf(pipe_fd, "--not\n"); |
| 368 | for (i = 0; i < pack_data->have_obj.nr; i++) |
| 369 | fprintf(pipe_fd, "%s\n", |
| 370 | oid_to_hex(&pack_data->have_obj.objects[i].item->oid)); |
| 371 | for (i = 0; i < pack_data->extra_edge_obj.nr; i++) |
| 372 | fprintf(pipe_fd, "%s\n", |
| 373 | oid_to_hex(&pack_data->extra_edge_obj.objects[i].item->oid)); |
| 374 | fprintf(pipe_fd, "\n"); |
| 375 | fflush(pipe_fd); |
| 376 | fclose(pipe_fd); |
| 377 | |
| 378 | /* We read from pack_objects.err to capture stderr output for |
| 379 | * progress bar, and pack_objects.out to capture the pack data. |
| 380 | */ |
| 381 | |
| 382 | while (1) { |
| 383 | uint64_t now_ms = getnanotime() / 1000000; |
| 384 | struct pollfd pfd[2]; |
| 385 | int pe, pu, pollsize, polltimeout_ms; |
| 386 | int ret; |
| 387 | |
| 388 | if (!last_sent_ms) |
| 389 | last_sent_ms = now_ms; |
| 390 | |
| 391 | reset_timeout(pack_data->timeout); |
| 392 | |
| 393 | pollsize = 0; |
| 394 | pe = pu = -1; |
| 395 | |
| 396 | if (0 <= pack_objects.out) { |
| 397 | pfd[pollsize].fd = pack_objects.out; |
| 398 | pfd[pollsize].events = POLLIN; |
| 399 | pu = pollsize; |
| 400 | pollsize++; |
| 401 | } |
| 402 | if (0 <= pack_objects.err) { |
| 403 | pfd[pollsize].fd = pack_objects.err; |
| 404 | pfd[pollsize].events = POLLIN; |
| 405 | pe = pollsize; |
| 406 | pollsize++; |
| 407 | } |
| 408 | |
| 409 | if (!pollsize) |
| 410 | break; |
| 411 | |
| 412 | if (pack_data->keepalive < 0) { |
| 413 | polltimeout_ms = -1; |
| 414 | } else { |
| 415 | /* |
| 416 | * The polling timeout needs to be adjusted based on |
| 417 | * the time we have sent our last package. The longer |
| 418 | * it's been in the past, the shorter the timeout |
| 419 | * becomes until we eventually don't block at all. |
| 420 | */ |
| 421 | polltimeout_ms = 1000 * pack_data->keepalive - (now_ms - last_sent_ms); |
| 422 | if (polltimeout_ms < 0) |
| 423 | polltimeout_ms = 0; |
| 424 | } |
| 425 | |
| 426 | ret = poll(pfd, pollsize, polltimeout_ms); |
| 427 | |
| 428 | if (ret < 0) { |
| 429 | if (errno != EINTR) { |
| 430 | error_errno("poll failed, resuming"); |
| 431 | sleep(1); |
| 432 | } |
| 433 | continue; |
| 434 | } |
| 435 | |
| 436 | if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) { |
| 437 | /* Status ready; we ship that in the side-band |
| 438 | * or dump to the standard error. |
| 439 | */ |
| 440 | sz = xread(pack_objects.err, progress, |
| 441 | sizeof(progress)); |
| 442 | if (0 < sz) { |
| 443 | send_client_data(2, progress, sz, |
| 444 | pack_data->use_sideband); |
| 445 | last_sent_ms = now_ms; |
| 446 | } else if (sz == 0) { |
| 447 | close(pack_objects.err); |
| 448 | pack_objects.err = -1; |
| 449 | } |
| 450 | else |
| 451 | goto fail; |
| 452 | /* give priority to status messages */ |
| 453 | continue; |
| 454 | } |
| 455 | |
| 456 | if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) { |
| 457 | bool did_send_data; |
| 458 | int result = relay_pack_data(pack_objects.out, |
| 459 | output_state, |
| 460 | pack_data->use_sideband, |
| 461 | !!uri_protocols, |
| 462 | &did_send_data); |
| 463 | |
| 464 | if (result == 0) { |
| 465 | close(pack_objects.out); |
| 466 | pack_objects.out = -1; |
| 467 | } else if (result < 0) { |
| 468 | goto fail; |
| 469 | } |
| 470 | |
| 471 | if (did_send_data) |
| 472 | last_sent_ms = now_ms; |
| 473 | } |
| 474 | |
| 475 | /* |
| 476 | * We hit the keepalive timeout without saying anything. If we |
| 477 | * have pending data we flush it out to the caller now. |
| 478 | * Otherwise, we send an empty message on the data sideband |
| 479 | * just to let the other side know we're still working on it, |
| 480 | * but don't have any data yet. |
| 481 | * |
| 482 | * If we don't have a sideband channel, there's no room in the |
| 483 | * protocol to say anything, so those clients are just out of |
| 484 | * luck. |
| 485 | */ |
| 486 | if (!ret && pack_data->use_sideband) { |
| 487 | if (output_state->packfile_started && output_state->used > 1) { |
| 488 | send_client_data(1, output_state->buffer, output_state->used - 1, |
| 489 | pack_data->use_sideband); |
| 490 | output_state->buffer[0] = output_state->buffer[output_state->used - 1]; |
| 491 | output_state->used = 1; |
| 492 | } else { |
| 493 | static const char buf[] = "0005\1"; |
| 494 | write_or_die(1, buf, 5); |
| 495 | } |
| 496 | |
| 497 | last_sent_ms = now_ms; |
| 498 | } |
| 499 | } |
| 500 | |
| 501 | if (finish_command(&pack_objects)) { |
| 502 | error("git upload-pack: git-pack-objects died with error."); |
| 503 | goto fail; |
| 504 | } |
| 505 | |
| 506 | /* flush the data */ |
| 507 | if (output_state->used > 0) |
| 508 | send_client_data(1, output_state->buffer, output_state->used, |
| 509 | pack_data->use_sideband); |
| 510 | free(output_state); |
| 511 | if (pack_data->use_sideband) |
| 512 | packet_flush(1); |
| 513 | return; |
| 514 | |
| 515 | fail: |
| 516 | free(output_state); |
| 517 | send_client_data(3, abort_msg, strlen(abort_msg), |
| 518 | pack_data->use_sideband); |
| 519 | die("git upload-pack: %s", abort_msg); |
| 520 | } |
| 521 | |
| 522 | static int do_got_oid(struct upload_pack_data *data, const struct object_id *oid) |
| 523 | { |
| 524 | struct object *o = parse_object_with_flags(the_repository, oid, |
| 525 | PARSE_OBJECT_SKIP_HASH_CHECK | |
| 526 | PARSE_OBJECT_DISCARD_TREE); |
| 527 | |
| 528 | if (!o) |
| 529 | die("oops (%s)", oid_to_hex(oid)); |
| 530 | |
| 531 | if (o->type == OBJ_COMMIT) { |
| 532 | struct commit_list *parents; |
| 533 | struct commit *commit = (struct commit *)o; |
| 534 | |
| 535 | if (!data->oldest_have || (commit->date < data->oldest_have)) |
| 536 | data->oldest_have = commit->date; |
| 537 | for (parents = commit->parents; |
| 538 | parents; |
| 539 | parents = parents->next) |
| 540 | parents->item->object.flags |= THEY_HAVE; |
| 541 | } |
| 542 | |
| 543 | if (o->flags & THEY_HAVE) |
| 544 | return 0; |
| 545 | o->flags |= THEY_HAVE; |
| 546 | |
| 547 | add_object_array(o, NULL, &data->have_obj); |
| 548 | return 1; |
| 549 | } |
| 550 | |
| 551 | static int got_oid(struct upload_pack_data *data, |
| 552 | const char *hex, struct object_id *oid) |
| 553 | { |
| 554 | if (get_oid_hex(hex, oid)) |
| 555 | die("git upload-pack: expected SHA1 object, got '%s'", hex); |
| 556 | if (!odb_has_object(the_repository->objects, oid, 0)) |
| 557 | return -1; |
| 558 | return do_got_oid(data, oid); |
| 559 | } |
| 560 | |
| 561 | static int ok_to_give_up(struct upload_pack_data *data) |
| 562 | { |
| 563 | timestamp_t min_generation = GENERATION_NUMBER_ZERO; |
| 564 | |
| 565 | if (!data->have_obj.nr) |
| 566 | return 0; |
| 567 | |
| 568 | return can_all_from_reach_with_flag(&data->want_obj, THEY_HAVE, |
| 569 | COMMON_KNOWN, data->oldest_have, |
| 570 | min_generation); |
| 571 | } |
| 572 | |
| 573 | static int get_common_commits(struct upload_pack_data *data, |
| 574 | struct packet_reader *reader) |
| 575 | { |
| 576 | struct object_id oid; |
| 577 | char last_hex[GIT_MAX_HEXSZ + 1]; |
| 578 | int got_common = 0; |
| 579 | int got_other = 0; |
| 580 | int sent_ready = 0; |
| 581 | |
| 582 | for (;;) { |
| 583 | const char *arg; |
| 584 | |
| 585 | reset_timeout(data->timeout); |
| 586 | |
| 587 | if (packet_reader_read(reader) != PACKET_READ_NORMAL) { |
| 588 | if (data->multi_ack == MULTI_ACK_DETAILED |
| 589 | && got_common |
| 590 | && !got_other |
| 591 | && ok_to_give_up(data)) { |
| 592 | sent_ready = 1; |
| 593 | packet_write_fmt(1, "ACK %s ready\n", last_hex); |
| 594 | } |
| 595 | if (data->have_obj.nr == 0 || data->multi_ack) |
| 596 | packet_write_fmt(1, "NAK\n"); |
| 597 | |
| 598 | if (data->no_done && sent_ready) { |
| 599 | packet_write_fmt(1, "ACK %s\n", last_hex); |
| 600 | return 0; |
| 601 | } |
| 602 | if (data->stateless_rpc) |
| 603 | exit(0); |
| 604 | got_common = 0; |
| 605 | got_other = 0; |
| 606 | continue; |
| 607 | } |
| 608 | if (skip_prefix(reader->line, "have ", &arg)) { |
| 609 | switch (got_oid(data, arg, &oid)) { |
| 610 | case -1: /* they have what we do not */ |
| 611 | got_other = 1; |
| 612 | if (data->multi_ack |
| 613 | && ok_to_give_up(data)) { |
| 614 | const char *hex = oid_to_hex(&oid); |
| 615 | if (data->multi_ack == MULTI_ACK_DETAILED) { |
| 616 | sent_ready = 1; |
| 617 | packet_write_fmt(1, "ACK %s ready\n", hex); |
| 618 | } else |
| 619 | packet_write_fmt(1, "ACK %s continue\n", hex); |
| 620 | } |
| 621 | break; |
| 622 | default: |
| 623 | got_common = 1; |
| 624 | oid_to_hex_r(last_hex, &oid); |
| 625 | if (data->multi_ack == MULTI_ACK_DETAILED) |
| 626 | packet_write_fmt(1, "ACK %s common\n", last_hex); |
| 627 | else if (data->multi_ack) |
| 628 | packet_write_fmt(1, "ACK %s continue\n", last_hex); |
| 629 | else if (data->have_obj.nr == 1) |
| 630 | packet_write_fmt(1, "ACK %s\n", last_hex); |
| 631 | break; |
| 632 | } |
| 633 | continue; |
| 634 | } |
| 635 | if (!strcmp(reader->line, "done")) { |
| 636 | if (data->have_obj.nr > 0) { |
| 637 | if (data->multi_ack) |
| 638 | packet_write_fmt(1, "ACK %s\n", last_hex); |
| 639 | return 0; |
| 640 | } |
| 641 | packet_write_fmt(1, "NAK\n"); |
| 642 | return -1; |
| 643 | } |
| 644 | die("git upload-pack: expected SHA1 list, got '%s'", reader->line); |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | static int allow_hidden_refs(enum allow_uor allow_uor) |
| 649 | { |
| 650 | if ((allow_uor & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1) |
| 651 | return 1; |
| 652 | return !(allow_uor & (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1)); |
| 653 | } |
| 654 | |
| 655 | static void for_each_namespaced_ref_1(refs_for_each_cb fn, |
| 656 | struct upload_pack_data *data) |
| 657 | { |
| 658 | struct refs_for_each_ref_options opts = { |
| 659 | .namespace = get_git_namespace(), |
| 660 | }; |
| 661 | |
| 662 | /* |
| 663 | * If `data->allow_uor` allows fetching hidden refs, we need to |
| 664 | * mark all references (including hidden ones), to check in |
| 665 | * `is_our_ref()` below. |
| 666 | * |
| 667 | * Otherwise, we only care about whether each reference's object |
| 668 | * has the OUR_REF bit set or not, so do not need to visit |
| 669 | * hidden references. |
| 670 | */ |
| 671 | if (allow_hidden_refs(data->allow_uor)) |
| 672 | opts.exclude_patterns = hidden_refs_to_excludes(&data->hidden_refs); |
| 673 | |
| 674 | refs_for_each_ref_ext(get_main_ref_store(the_repository), |
| 675 | fn, data, &opts); |
| 676 | } |
| 677 | |
| 678 | |
| 679 | static int is_our_ref(struct object *o, enum allow_uor allow_uor) |
| 680 | { |
| 681 | return o->flags & ((allow_hidden_refs(allow_uor) ? 0 : HIDDEN_REF) | OUR_REF); |
| 682 | } |
| 683 | |
| 684 | /* |
| 685 | * on successful case, it's up to the caller to close cmd->out |
| 686 | */ |
| 687 | static int do_reachable_revlist(struct child_process *cmd, |
| 688 | struct object_array *src, |
| 689 | struct object_array *reachable, |
| 690 | enum allow_uor allow_uor) |
| 691 | { |
| 692 | struct object *o; |
| 693 | FILE *cmd_in = NULL; |
| 694 | int i; |
| 695 | |
| 696 | strvec_pushl(&cmd->args, "rev-list", "--stdin", NULL); |
| 697 | cmd->git_cmd = 1; |
| 698 | cmd->no_stderr = 1; |
| 699 | cmd->in = -1; |
| 700 | cmd->out = -1; |
| 701 | |
| 702 | /* |
| 703 | * If the next rev-list --stdin encounters an unknown commit, |
| 704 | * it terminates, which will cause SIGPIPE in the write loop |
| 705 | * below. |
| 706 | */ |
| 707 | sigchain_push(SIGPIPE, SIG_IGN); |
| 708 | |
| 709 | if (start_command(cmd)) |
| 710 | goto error; |
| 711 | |
| 712 | cmd_in = xfdopen(cmd->in, "w"); |
| 713 | |
| 714 | for (i = get_max_object_index(the_repository); 0 < i; ) { |
| 715 | o = get_indexed_object(the_repository, --i); |
| 716 | if (!o) |
| 717 | continue; |
| 718 | if (reachable && o->type == OBJ_COMMIT) |
| 719 | o->flags &= ~TMP_MARK; |
| 720 | if (!is_our_ref(o, allow_uor)) |
| 721 | continue; |
| 722 | if (fprintf(cmd_in, "^%s\n", oid_to_hex(&o->oid)) < 0) |
| 723 | goto error; |
| 724 | } |
| 725 | for (i = 0; i < src->nr; i++) { |
| 726 | o = src->objects[i].item; |
| 727 | if (is_our_ref(o, allow_uor)) { |
| 728 | if (reachable) |
| 729 | add_object_array(o, NULL, reachable); |
| 730 | continue; |
| 731 | } |
| 732 | if (reachable && o->type == OBJ_COMMIT) |
| 733 | o->flags |= TMP_MARK; |
| 734 | if (fprintf(cmd_in, "%s\n", oid_to_hex(&o->oid)) < 0) |
| 735 | goto error; |
| 736 | } |
| 737 | if (ferror(cmd_in) || fflush(cmd_in)) |
| 738 | goto error; |
| 739 | fclose(cmd_in); |
| 740 | cmd->in = -1; |
| 741 | sigchain_pop(SIGPIPE); |
| 742 | |
| 743 | return 0; |
| 744 | |
| 745 | error: |
| 746 | sigchain_pop(SIGPIPE); |
| 747 | |
| 748 | if (cmd_in) |
| 749 | fclose(cmd_in); |
| 750 | if (cmd->out >= 0) |
| 751 | close(cmd->out); |
| 752 | return -1; |
| 753 | } |
| 754 | |
| 755 | static int has_unreachable(struct object_array *src, enum allow_uor allow_uor) |
| 756 | { |
| 757 | struct child_process cmd = CHILD_PROCESS_INIT; |
| 758 | char buf[1]; |
| 759 | int i; |
| 760 | |
| 761 | if (do_reachable_revlist(&cmd, src, NULL, allow_uor) < 0) |
| 762 | goto error; |
| 763 | |
| 764 | /* |
| 765 | * The commits out of the rev-list are not ancestors of |
| 766 | * our ref. |
| 767 | */ |
| 768 | i = read_in_full(cmd.out, buf, 1); |
| 769 | if (i) |
| 770 | goto error; |
| 771 | close(cmd.out); |
| 772 | cmd.out = -1; |
| 773 | |
| 774 | /* |
| 775 | * rev-list may have died by encountering a bad commit |
| 776 | * in the history, in which case we do want to bail out |
| 777 | * even when it showed no commit. |
| 778 | */ |
| 779 | if (finish_command(&cmd)) |
| 780 | goto error; |
| 781 | |
| 782 | /* All the non-tip ones are ancestors of what we advertised */ |
| 783 | return 0; |
| 784 | |
| 785 | error: |
| 786 | if (cmd.out >= 0) |
| 787 | close(cmd.out); |
| 788 | child_process_clear(&cmd); |
| 789 | return 1; |
| 790 | } |
| 791 | |
| 792 | static void check_non_tip(struct upload_pack_data *data) |
| 793 | { |
| 794 | int i; |
| 795 | |
| 796 | /* |
| 797 | * In the normal in-process case without |
| 798 | * uploadpack.allowReachableSHA1InWant, |
| 799 | * non-tip requests can never happen. |
| 800 | */ |
| 801 | if (!data->stateless_rpc && !(data->allow_uor & ALLOW_REACHABLE_SHA1)) |
| 802 | goto error; |
| 803 | if (!has_unreachable(&data->want_obj, data->allow_uor)) |
| 804 | /* All the non-tip ones are ancestors of what we advertised */ |
| 805 | return; |
| 806 | |
| 807 | error: |
| 808 | /* Pick one of them (we know there at least is one) */ |
| 809 | for (i = 0; i < data->want_obj.nr; i++) { |
| 810 | struct object *o = data->want_obj.objects[i].item; |
| 811 | if (!is_our_ref(o, data->allow_uor)) { |
| 812 | error("git upload-pack: not our ref %s", |
| 813 | oid_to_hex(&o->oid)); |
| 814 | packet_writer_error(&data->writer, |
| 815 | "upload-pack: not our ref %s", |
| 816 | oid_to_hex(&o->oid)); |
| 817 | exit(128); |
| 818 | } |
| 819 | } |
| 820 | } |
| 821 | |
| 822 | static void send_shallow(struct upload_pack_data *data, |
| 823 | struct commit_list *result) |
| 824 | { |
| 825 | while (result) { |
| 826 | struct object *object = &result->item->object; |
| 827 | if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) { |
| 828 | packet_writer_write(&data->writer, "shallow %s", |
| 829 | oid_to_hex(&object->oid)); |
| 830 | register_shallow(the_repository, &object->oid); |
| 831 | data->shallow_nr++; |
| 832 | } |
| 833 | result = result->next; |
| 834 | } |
| 835 | } |
| 836 | |
| 837 | static void send_unshallow(struct upload_pack_data *data) |
| 838 | { |
| 839 | int i; |
| 840 | |
| 841 | for (i = 0; i < data->shallows.nr; i++) { |
| 842 | struct object *object = data->shallows.objects[i].item; |
| 843 | if (object->flags & NOT_SHALLOW) { |
| 844 | struct commit_list *parents; |
| 845 | packet_writer_write(&data->writer, "unshallow %s", |
| 846 | oid_to_hex(&object->oid)); |
| 847 | object->flags &= ~CLIENT_SHALLOW; |
| 848 | /* |
| 849 | * We want to _register_ "object" as shallow, but we |
| 850 | * also need to traverse object's parents to deepen a |
| 851 | * shallow clone. Unregister it for now so we can |
| 852 | * parse and add the parents to the want list, then |
| 853 | * re-register it. |
| 854 | */ |
| 855 | unregister_shallow(&object->oid); |
| 856 | object->parsed = 0; |
| 857 | parse_commit_or_die((struct commit *)object); |
| 858 | parents = ((struct commit *)object)->parents; |
| 859 | while (parents) { |
| 860 | add_object_array(&parents->item->object, |
| 861 | NULL, &data->want_obj); |
| 862 | parents = parents->next; |
| 863 | } |
| 864 | add_object_array(object, NULL, &data->extra_edge_obj); |
| 865 | } |
| 866 | /* make sure commit traversal conforms to client */ |
| 867 | register_shallow(the_repository, &object->oid); |
| 868 | } |
| 869 | } |
| 870 | |
| 871 | static int check_ref(const struct reference *ref, void *cb_data); |
| 872 | |
| 873 | static void deepen(struct upload_pack_data *data, int depth) |
| 874 | { |
| 875 | if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) { |
| 876 | int i; |
| 877 | |
| 878 | for (i = 0; i < data->shallows.nr; i++) { |
| 879 | struct object *object = data->shallows.objects[i].item; |
| 880 | object->flags |= NOT_SHALLOW; |
| 881 | } |
| 882 | } else { |
| 883 | struct commit_list *result; |
| 884 | |
| 885 | result = get_shallow_commits(&data->want_obj, &data->shallows, |
| 886 | data->deepen_relative, depth, |
| 887 | SHALLOW, NOT_SHALLOW); |
| 888 | send_shallow(data, result); |
| 889 | commit_list_free(result); |
| 890 | } |
| 891 | |
| 892 | send_unshallow(data); |
| 893 | } |
| 894 | |
| 895 | static void deepen_by_rev_list(struct upload_pack_data *data, |
| 896 | struct strvec *argv) |
| 897 | { |
| 898 | struct commit_list *result; |
| 899 | |
| 900 | disable_commit_graph(the_repository); |
| 901 | result = get_shallow_commits_by_rev_list(argv, SHALLOW, NOT_SHALLOW); |
| 902 | send_shallow(data, result); |
| 903 | commit_list_free(result); |
| 904 | send_unshallow(data); |
| 905 | } |
| 906 | |
| 907 | /* Returns 1 if a shallow list is sent or 0 otherwise */ |
| 908 | static int send_shallow_list(struct upload_pack_data *data) |
| 909 | { |
| 910 | int ret = 0; |
| 911 | |
| 912 | if (data->depth > 0 && data->deepen_rev_list) |
| 913 | die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together"); |
| 914 | if (data->depth > 0) { |
| 915 | deepen(data, data->depth); |
| 916 | ret = 1; |
| 917 | } else if (data->deepen_rev_list) { |
| 918 | struct strvec av = STRVEC_INIT; |
| 919 | int i; |
| 920 | |
| 921 | strvec_push(&av, "rev-list"); |
| 922 | if (data->deepen_since) |
| 923 | strvec_pushf(&av, "--max-age=%"PRItime, data->deepen_since); |
| 924 | if (oidset_size(&data->deepen_not)) { |
| 925 | const struct object_id *oid; |
| 926 | struct oidset_iter iter; |
| 927 | strvec_push(&av, "--not"); |
| 928 | oidset_iter_init(&data->deepen_not, &iter); |
| 929 | while ((oid = oidset_iter_next(&iter))) |
| 930 | strvec_push(&av, oid_to_hex(oid)); |
| 931 | strvec_push(&av, "--not"); |
| 932 | } |
| 933 | for (i = 0; i < data->want_obj.nr; i++) { |
| 934 | struct object *o = data->want_obj.objects[i].item; |
| 935 | strvec_push(&av, oid_to_hex(&o->oid)); |
| 936 | } |
| 937 | deepen_by_rev_list(data, &av); |
| 938 | strvec_clear(&av); |
| 939 | ret = 1; |
| 940 | } else { |
| 941 | if (data->shallows.nr > 0) { |
| 942 | int i; |
| 943 | for (i = 0; i < data->shallows.nr; i++) |
| 944 | register_shallow(the_repository, |
| 945 | &data->shallows.objects[i].item->oid); |
| 946 | } |
| 947 | } |
| 948 | |
| 949 | data->shallow_nr += data->shallows.nr; |
| 950 | return ret; |
| 951 | } |
| 952 | |
| 953 | static int process_shallow(const char *line, struct object_array *shallows) |
| 954 | { |
| 955 | const char *arg; |
| 956 | if (skip_prefix(line, "shallow ", &arg)) { |
| 957 | struct object_id oid; |
| 958 | struct object *object; |
| 959 | if (get_oid_hex(arg, &oid)) |
| 960 | die("invalid shallow line: %s", line); |
| 961 | object = parse_object(the_repository, &oid); |
| 962 | if (!object) |
| 963 | return 1; |
| 964 | if (object->type != OBJ_COMMIT) |
| 965 | die("invalid shallow object %s", oid_to_hex(&oid)); |
| 966 | if (!(object->flags & CLIENT_SHALLOW)) { |
| 967 | object->flags |= CLIENT_SHALLOW; |
| 968 | add_object_array(object, NULL, shallows); |
| 969 | } |
| 970 | return 1; |
| 971 | } |
| 972 | |
| 973 | return 0; |
| 974 | } |
| 975 | |
| 976 | static int process_deepen(const char *line, int *depth) |
| 977 | { |
| 978 | const char *arg; |
| 979 | if (skip_prefix(line, "deepen ", &arg)) { |
| 980 | char *end = NULL; |
| 981 | *depth = (int)strtol(arg, &end, 0); |
| 982 | if (!end || *end || *depth <= 0) |
| 983 | die("Invalid deepen: %s", line); |
| 984 | return 1; |
| 985 | } |
| 986 | |
| 987 | return 0; |
| 988 | } |
| 989 | |
| 990 | static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list) |
| 991 | { |
| 992 | const char *arg; |
| 993 | if (skip_prefix(line, "deepen-since ", &arg)) { |
| 994 | char *end = NULL; |
| 995 | *deepen_since = parse_timestamp(arg, &end, 0); |
| 996 | if (!end || *end || !deepen_since || |
| 997 | /* revisions.c's max_age -1 is special */ |
| 998 | *deepen_since == -1) |
| 999 | die("Invalid deepen-since: %s", line); |
| 1000 | *deepen_rev_list = 1; |
| 1001 | return 1; |
| 1002 | } |
| 1003 | return 0; |
| 1004 | } |
| 1005 | |
| 1006 | static int process_deepen_not(const char *line, struct oidset *deepen_not, int *deepen_rev_list) |
| 1007 | { |
| 1008 | const char *arg; |
| 1009 | if (skip_prefix(line, "deepen-not ", &arg)) { |
| 1010 | int cnt; |
| 1011 | char *ref = NULL; |
| 1012 | struct object_id oid; |
| 1013 | cnt = expand_ref(the_repository, arg, strlen(arg), &oid, &ref); |
| 1014 | if (cnt > 1) |
| 1015 | die("git upload-pack: ambiguous deepen-not: %s", line); |
| 1016 | if (cnt < 1) |
| 1017 | die("git upload-pack: deepen-not is not a ref: %s", line); |
| 1018 | oidset_insert(deepen_not, &oid); |
| 1019 | free(ref); |
| 1020 | *deepen_rev_list = 1; |
| 1021 | return 1; |
| 1022 | } |
| 1023 | return 0; |
| 1024 | } |
| 1025 | |
| 1026 | NORETURN __attribute__((format(printf,2,3))) |
| 1027 | static void send_err_and_die(struct upload_pack_data *data, |
| 1028 | const char *fmt, ...) |
| 1029 | { |
| 1030 | struct strbuf buf = STRBUF_INIT; |
| 1031 | va_list ap; |
| 1032 | |
| 1033 | va_start(ap, fmt); |
| 1034 | strbuf_vaddf(&buf, fmt, ap); |
| 1035 | va_end(ap); |
| 1036 | |
| 1037 | packet_writer_error(&data->writer, "%s", buf.buf); |
| 1038 | die("%s", buf.buf); |
| 1039 | } |
| 1040 | |
| 1041 | static void check_one_filter(struct upload_pack_data *data, |
| 1042 | struct list_objects_filter_options *opts) |
| 1043 | { |
| 1044 | const char *key = list_object_filter_config_name(opts->choice); |
| 1045 | struct string_list_item *item = string_list_lookup(&data->allowed_filters, |
| 1046 | key); |
| 1047 | int allowed; |
| 1048 | |
| 1049 | if (item) |
| 1050 | allowed = (intptr_t)item->util; |
| 1051 | else |
| 1052 | allowed = data->allow_filter_fallback; |
| 1053 | |
| 1054 | if (!allowed) |
| 1055 | send_err_and_die(data, "filter '%s' not supported", key); |
| 1056 | |
| 1057 | if (opts->choice == LOFC_TREE_DEPTH && |
| 1058 | opts->tree_exclude_depth > data->tree_filter_max_depth) |
| 1059 | send_err_and_die(data, |
| 1060 | "tree filter allows max depth %lu, but got %lu", |
| 1061 | data->tree_filter_max_depth, |
| 1062 | opts->tree_exclude_depth); |
| 1063 | } |
| 1064 | |
| 1065 | static void check_filter_recurse(struct upload_pack_data *data, |
| 1066 | struct list_objects_filter_options *opts) |
| 1067 | { |
| 1068 | size_t i; |
| 1069 | |
| 1070 | check_one_filter(data, opts); |
| 1071 | if (opts->choice != LOFC_COMBINE) |
| 1072 | return; |
| 1073 | |
| 1074 | for (i = 0; i < opts->sub_nr; i++) |
| 1075 | check_filter_recurse(data, &opts->sub[i]); |
| 1076 | } |
| 1077 | |
| 1078 | static void die_if_using_banned_filter(struct upload_pack_data *data) |
| 1079 | { |
| 1080 | check_filter_recurse(data, &data->filter_options); |
| 1081 | } |
| 1082 | |
| 1083 | static void receive_needs(struct upload_pack_data *data, |
| 1084 | struct packet_reader *reader) |
| 1085 | { |
| 1086 | int has_non_tip = 0; |
| 1087 | |
| 1088 | data->shallow_nr = 0; |
| 1089 | for (;;) { |
| 1090 | struct object *o; |
| 1091 | const char *features; |
| 1092 | struct object_id oid_buf; |
| 1093 | const char *arg; |
| 1094 | size_t feature_len; |
| 1095 | |
| 1096 | reset_timeout(data->timeout); |
| 1097 | if (packet_reader_read(reader) != PACKET_READ_NORMAL) |
| 1098 | break; |
| 1099 | |
| 1100 | if (process_shallow(reader->line, &data->shallows)) |
| 1101 | continue; |
| 1102 | if (process_deepen(reader->line, &data->depth)) |
| 1103 | continue; |
| 1104 | if (process_deepen_since(reader->line, &data->deepen_since, &data->deepen_rev_list)) |
| 1105 | continue; |
| 1106 | if (process_deepen_not(reader->line, &data->deepen_not, &data->deepen_rev_list)) |
| 1107 | continue; |
| 1108 | |
| 1109 | if (skip_prefix(reader->line, "filter ", &arg)) { |
| 1110 | if (!data->filter_capability_requested) |
| 1111 | die("git upload-pack: filtering capability not negotiated"); |
| 1112 | list_objects_filter_die_if_populated(&data->filter_options); |
| 1113 | parse_list_objects_filter(&data->filter_options, arg); |
| 1114 | die_if_using_banned_filter(data); |
| 1115 | continue; |
| 1116 | } |
| 1117 | |
| 1118 | if (!skip_prefix(reader->line, "want ", &arg) || |
| 1119 | parse_oid_hex(arg, &oid_buf, &features)) |
| 1120 | die("git upload-pack: protocol error, " |
| 1121 | "expected to get object ID, not '%s'", reader->line); |
| 1122 | |
| 1123 | if (parse_feature_request(features, "deepen-relative")) |
| 1124 | data->deepen_relative = 1; |
| 1125 | if (parse_feature_request(features, "multi_ack_detailed")) |
| 1126 | data->multi_ack = MULTI_ACK_DETAILED; |
| 1127 | else if (parse_feature_request(features, "multi_ack")) |
| 1128 | data->multi_ack = MULTI_ACK; |
| 1129 | if (parse_feature_request(features, "no-done")) |
| 1130 | data->no_done = 1; |
| 1131 | if (parse_feature_request(features, "thin-pack")) |
| 1132 | data->use_thin_pack = 1; |
| 1133 | if (parse_feature_request(features, "ofs-delta")) |
| 1134 | data->use_ofs_delta = 1; |
| 1135 | if (parse_feature_request(features, "side-band-64k")) |
| 1136 | data->use_sideband = LARGE_PACKET_MAX; |
| 1137 | else if (parse_feature_request(features, "side-band")) |
| 1138 | data->use_sideband = DEFAULT_PACKET_MAX; |
| 1139 | if (parse_feature_request(features, "no-progress")) |
| 1140 | data->no_progress = 1; |
| 1141 | if (parse_feature_request(features, "include-tag")) |
| 1142 | data->use_include_tag = 1; |
| 1143 | if (data->allow_filter && |
| 1144 | parse_feature_request(features, "filter")) |
| 1145 | data->filter_capability_requested = 1; |
| 1146 | |
| 1147 | arg = parse_feature_value(features, "session-id", &feature_len, NULL); |
| 1148 | if (arg) { |
| 1149 | char *client_sid = xstrndup(arg, feature_len); |
| 1150 | trace2_data_string("transfer", NULL, "client-sid", client_sid); |
| 1151 | free(client_sid); |
| 1152 | } |
| 1153 | |
| 1154 | o = parse_object_with_flags(the_repository, &oid_buf, |
| 1155 | PARSE_OBJECT_SKIP_HASH_CHECK | |
| 1156 | PARSE_OBJECT_DISCARD_TREE); |
| 1157 | if (!o) { |
| 1158 | packet_writer_error(&data->writer, |
| 1159 | "upload-pack: not our ref %s", |
| 1160 | oid_to_hex(&oid_buf)); |
| 1161 | die("git upload-pack: not our ref %s", |
| 1162 | oid_to_hex(&oid_buf)); |
| 1163 | } |
| 1164 | if (!(o->flags & WANTED)) { |
| 1165 | o->flags |= WANTED; |
| 1166 | if (!((data->allow_uor & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1 |
| 1167 | || is_our_ref(o, data->allow_uor))) |
| 1168 | has_non_tip = 1; |
| 1169 | add_object_array(o, NULL, &data->want_obj); |
| 1170 | } |
| 1171 | } |
| 1172 | |
| 1173 | /* |
| 1174 | * We have sent all our refs already, and the other end |
| 1175 | * should have chosen out of them. When we are operating |
| 1176 | * in the stateless RPC mode, however, their choice may |
| 1177 | * have been based on the set of older refs advertised |
| 1178 | * by another process that handled the initial request. |
| 1179 | */ |
| 1180 | if (has_non_tip) |
| 1181 | check_non_tip(data); |
| 1182 | |
| 1183 | if (!data->use_sideband && data->daemon_mode) |
| 1184 | data->no_progress = 1; |
| 1185 | |
| 1186 | if (data->depth == 0 && !data->deepen_rev_list && data->shallows.nr == 0) |
| 1187 | return; |
| 1188 | |
| 1189 | if (send_shallow_list(data)) |
| 1190 | packet_flush(1); |
| 1191 | } |
| 1192 | |
| 1193 | /* return non-zero if the ref is hidden, otherwise 0 */ |
| 1194 | static int mark_our_ref(const char *refname, const char *refname_full, |
| 1195 | const struct object_id *oid, const struct strvec *hidden_refs) |
| 1196 | { |
| 1197 | struct object *o = lookup_unknown_object(the_repository, oid); |
| 1198 | |
| 1199 | if (ref_is_hidden(refname, refname_full, hidden_refs)) { |
| 1200 | o->flags |= HIDDEN_REF; |
| 1201 | return 1; |
| 1202 | } |
| 1203 | o->flags |= OUR_REF; |
| 1204 | return 0; |
| 1205 | } |
| 1206 | |
| 1207 | static int check_ref(const struct reference *ref, void *cb_data) |
| 1208 | { |
| 1209 | const char *refname = strip_namespace(ref->name); |
| 1210 | struct upload_pack_data *data = cb_data; |
| 1211 | |
| 1212 | mark_our_ref(refname, ref->name, ref->oid, &data->hidden_refs); |
| 1213 | return 0; |
| 1214 | } |
| 1215 | |
| 1216 | static void format_symref_info(struct strbuf *buf, struct string_list *symref) |
| 1217 | { |
| 1218 | struct string_list_item *item; |
| 1219 | |
| 1220 | if (!symref->nr) |
| 1221 | return; |
| 1222 | for_each_string_list_item(item, symref) |
| 1223 | strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util); |
| 1224 | } |
| 1225 | |
| 1226 | static void format_session_id(struct strbuf *buf, struct upload_pack_data *d) { |
| 1227 | if (d->advertise_sid) |
| 1228 | strbuf_addf(buf, " session-id=%s", trace2_session_id()); |
| 1229 | } |
| 1230 | |
| 1231 | static void write_v0_ref(struct upload_pack_data *data, |
| 1232 | const struct reference *ref, |
| 1233 | const char *refname_nons) |
| 1234 | { |
| 1235 | static const char *capabilities = "multi_ack thin-pack side-band" |
| 1236 | " side-band-64k ofs-delta shallow deepen-since deepen-not" |
| 1237 | " deepen-relative no-progress include-tag multi_ack_detailed"; |
| 1238 | struct object_id peeled; |
| 1239 | |
| 1240 | if (mark_our_ref(refname_nons, ref->name, ref->oid, &data->hidden_refs)) |
| 1241 | return; |
| 1242 | |
| 1243 | if (capabilities) { |
| 1244 | struct strbuf symref_info = STRBUF_INIT; |
| 1245 | struct strbuf session_id = STRBUF_INIT; |
| 1246 | |
| 1247 | format_symref_info(&symref_info, &data->symref); |
| 1248 | format_session_id(&session_id, data); |
| 1249 | packet_fwrite_fmt(stdout, "%s %s%c%s%s%s%s%s%s%s object-format=%s agent=%s\n", |
| 1250 | oid_to_hex(ref->oid), refname_nons, |
| 1251 | 0, capabilities, |
| 1252 | (data->allow_uor & ALLOW_TIP_SHA1) ? |
| 1253 | " allow-tip-sha1-in-want" : "", |
| 1254 | (data->allow_uor & ALLOW_REACHABLE_SHA1) ? |
| 1255 | " allow-reachable-sha1-in-want" : "", |
| 1256 | data->no_done ? " no-done" : "", |
| 1257 | symref_info.buf, |
| 1258 | data->allow_filter ? " filter" : "", |
| 1259 | session_id.buf, |
| 1260 | the_hash_algo->name, |
| 1261 | git_user_agent_sanitized()); |
| 1262 | strbuf_release(&symref_info); |
| 1263 | strbuf_release(&session_id); |
| 1264 | data->sent_capabilities = 1; |
| 1265 | } else { |
| 1266 | packet_fwrite_fmt(stdout, "%s %s\n", oid_to_hex(ref->oid), refname_nons); |
| 1267 | } |
| 1268 | capabilities = NULL; |
| 1269 | if (!reference_get_peeled_oid(the_repository, ref, &peeled)) |
| 1270 | packet_fwrite_fmt(stdout, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons); |
| 1271 | return; |
| 1272 | } |
| 1273 | |
| 1274 | static int send_ref(const struct reference *ref, void *cb_data) |
| 1275 | { |
| 1276 | write_v0_ref(cb_data, ref, strip_namespace(ref->name)); |
| 1277 | return 0; |
| 1278 | } |
| 1279 | |
| 1280 | static int find_symref(const struct reference *ref, void *cb_data) |
| 1281 | { |
| 1282 | const char *symref_target; |
| 1283 | struct string_list_item *item; |
| 1284 | int flag; |
| 1285 | |
| 1286 | if ((ref->flags & REF_ISSYMREF) == 0) |
| 1287 | return 0; |
| 1288 | symref_target = refs_resolve_ref_unsafe(get_main_ref_store(the_repository), |
| 1289 | ref->name, 0, NULL, &flag); |
| 1290 | if (!symref_target || (flag & REF_ISSYMREF) == 0) |
| 1291 | die("'%s' is a symref but it is not?", ref->name); |
| 1292 | item = string_list_append(cb_data, strip_namespace(ref->name)); |
| 1293 | item->util = xstrdup(strip_namespace(symref_target)); |
| 1294 | return 0; |
| 1295 | } |
| 1296 | |
| 1297 | static int parse_object_filter_config(const char *var, const char *value, |
| 1298 | const struct key_value_info *kvi, |
| 1299 | struct upload_pack_data *data) |
| 1300 | { |
| 1301 | struct strbuf buf = STRBUF_INIT; |
| 1302 | const char *sub, *key; |
| 1303 | size_t sub_len; |
| 1304 | |
| 1305 | if (parse_config_key(var, "uploadpackfilter", &sub, &sub_len, &key)) |
| 1306 | return 0; |
| 1307 | |
| 1308 | if (!sub) { |
| 1309 | if (!strcmp(key, "allow")) |
| 1310 | data->allow_filter_fallback = git_config_bool(var, value); |
| 1311 | return 0; |
| 1312 | } |
| 1313 | |
| 1314 | strbuf_add(&buf, sub, sub_len); |
| 1315 | |
| 1316 | if (!strcmp(key, "allow")) |
| 1317 | string_list_insert(&data->allowed_filters, buf.buf)->util = |
| 1318 | (void *)(intptr_t)git_config_bool(var, value); |
| 1319 | else if (!strcmp(buf.buf, "tree") && !strcmp(key, "maxdepth")) { |
| 1320 | if (!value) { |
| 1321 | strbuf_release(&buf); |
| 1322 | return config_error_nonbool(var); |
| 1323 | } |
| 1324 | string_list_insert(&data->allowed_filters, buf.buf)->util = |
| 1325 | (void *)(intptr_t)1; |
| 1326 | data->tree_filter_max_depth = git_config_ulong(var, value, |
| 1327 | kvi); |
| 1328 | } |
| 1329 | |
| 1330 | strbuf_release(&buf); |
| 1331 | return 0; |
| 1332 | } |
| 1333 | |
| 1334 | static int upload_pack_config(const char *var, const char *value, |
| 1335 | const struct config_context *ctx, |
| 1336 | void *cb_data) |
| 1337 | { |
| 1338 | struct upload_pack_data *data = cb_data; |
| 1339 | struct repo_config_values *cfg = repo_config_values(the_repository); |
| 1340 | |
| 1341 | if (!strcmp("uploadpack.allowtipsha1inwant", var)) { |
| 1342 | if (git_config_bool(var, value)) |
| 1343 | data->allow_uor |= ALLOW_TIP_SHA1; |
| 1344 | else |
| 1345 | data->allow_uor &= ~ALLOW_TIP_SHA1; |
| 1346 | } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) { |
| 1347 | if (git_config_bool(var, value)) |
| 1348 | data->allow_uor |= ALLOW_REACHABLE_SHA1; |
| 1349 | else |
| 1350 | data->allow_uor &= ~ALLOW_REACHABLE_SHA1; |
| 1351 | } else if (!strcmp("uploadpack.allowanysha1inwant", var)) { |
| 1352 | if (git_config_bool(var, value)) |
| 1353 | data->allow_uor |= ALLOW_ANY_SHA1; |
| 1354 | else |
| 1355 | data->allow_uor &= ~ALLOW_ANY_SHA1; |
| 1356 | } else if (!strcmp("uploadpack.keepalive", var)) { |
| 1357 | data->keepalive = git_config_int(var, value, ctx->kvi); |
| 1358 | if (!data->keepalive) |
| 1359 | data->keepalive = -1; |
| 1360 | } else if (!strcmp("uploadpack.allowfilter", var)) { |
| 1361 | data->allow_filter = git_config_bool(var, value); |
| 1362 | } else if (!strcmp("uploadpack.allowrefinwant", var)) { |
| 1363 | data->allow_ref_in_want = git_config_bool(var, value); |
| 1364 | } else if (!strcmp("uploadpack.allowsidebandall", var)) { |
| 1365 | data->allow_sideband_all = git_config_bool(var, value); |
| 1366 | } else if (!strcmp("uploadpack.blobpackfileuri", var)) { |
| 1367 | if (value) |
| 1368 | data->allow_packfile_uris = 1; |
| 1369 | } else if (!strcmp("core.precomposeunicode", var)) { |
| 1370 | cfg->precomposed_unicode = git_config_bool(var, value); |
| 1371 | } else if (!strcmp("transfer.advertisesid", var)) { |
| 1372 | data->advertise_sid = git_config_bool(var, value); |
| 1373 | } |
| 1374 | |
| 1375 | if (parse_object_filter_config(var, value, ctx->kvi, data) < 0) |
| 1376 | return -1; |
| 1377 | |
| 1378 | return parse_hide_refs_config(var, value, "uploadpack", &data->hidden_refs); |
| 1379 | } |
| 1380 | |
| 1381 | static int upload_pack_protected_config(const char *var, const char *value, |
| 1382 | const struct config_context *ctx UNUSED, |
| 1383 | void *cb_data) |
| 1384 | { |
| 1385 | struct upload_pack_data *data = cb_data; |
| 1386 | |
| 1387 | if (!strcmp("uploadpack.packobjectshook", var)) |
| 1388 | return git_config_string(&data->pack_objects_hook, var, value); |
| 1389 | return 0; |
| 1390 | } |
| 1391 | |
| 1392 | static void get_upload_pack_config(struct repository *r, |
| 1393 | struct upload_pack_data *data) |
| 1394 | { |
| 1395 | repo_config(r, upload_pack_config, data); |
| 1396 | git_protected_config(upload_pack_protected_config, data); |
| 1397 | |
| 1398 | data->allow_sideband_all |= git_env_bool("GIT_TEST_SIDEBAND_ALL", 0); |
| 1399 | } |
| 1400 | |
| 1401 | void upload_pack(const int advertise_refs, const int stateless_rpc, |
| 1402 | const int timeout) |
| 1403 | { |
| 1404 | struct packet_reader reader; |
| 1405 | struct upload_pack_data data; |
| 1406 | |
| 1407 | upload_pack_data_init(&data); |
| 1408 | get_upload_pack_config(the_repository, &data); |
| 1409 | |
| 1410 | data.stateless_rpc = stateless_rpc; |
| 1411 | data.timeout = timeout; |
| 1412 | if (data.timeout) |
| 1413 | data.daemon_mode = 1; |
| 1414 | |
| 1415 | refs_head_ref_namespaced(get_main_ref_store(the_repository), |
| 1416 | find_symref, &data.symref); |
| 1417 | |
| 1418 | if (advertise_refs || !data.stateless_rpc) { |
| 1419 | reset_timeout(data.timeout); |
| 1420 | if (advertise_refs) |
| 1421 | data.no_done = 1; |
| 1422 | refs_head_ref_namespaced(get_main_ref_store(the_repository), |
| 1423 | send_ref, &data); |
| 1424 | for_each_namespaced_ref_1(send_ref, &data); |
| 1425 | if (!data.sent_capabilities) { |
| 1426 | struct reference ref = { |
| 1427 | .name = "capabilities^{}", |
| 1428 | .oid = null_oid(the_hash_algo), |
| 1429 | }; |
| 1430 | |
| 1431 | write_v0_ref(&data, &ref, ref.name); |
| 1432 | } |
| 1433 | /* |
| 1434 | * fflush stdout before calling advertise_shallow_grafts because send_ref |
| 1435 | * uses stdio. |
| 1436 | */ |
| 1437 | fflush_or_die(stdout); |
| 1438 | advertise_shallow_grafts(1); |
| 1439 | packet_flush(1); |
| 1440 | } else { |
| 1441 | refs_head_ref_namespaced(get_main_ref_store(the_repository), |
| 1442 | check_ref, &data); |
| 1443 | for_each_namespaced_ref_1(check_ref, &data); |
| 1444 | } |
| 1445 | |
| 1446 | if (!advertise_refs) { |
| 1447 | packet_reader_init(&reader, 0, NULL, 0, |
| 1448 | PACKET_READ_CHOMP_NEWLINE | |
| 1449 | PACKET_READ_DIE_ON_ERR_PACKET); |
| 1450 | |
| 1451 | receive_needs(&data, &reader); |
| 1452 | |
| 1453 | /* |
| 1454 | * An EOF at this exact point in negotiation should be |
| 1455 | * acceptable from stateless clients as they will consume the |
| 1456 | * shallow list before doing subsequent rpc with haves/etc. |
| 1457 | */ |
| 1458 | if (data.stateless_rpc) |
| 1459 | reader.options |= PACKET_READ_GENTLE_ON_EOF; |
| 1460 | |
| 1461 | if (data.want_obj.nr && |
| 1462 | packet_reader_peek(&reader) != PACKET_READ_EOF) { |
| 1463 | reader.options &= ~PACKET_READ_GENTLE_ON_EOF; |
| 1464 | get_common_commits(&data, &reader); |
| 1465 | create_pack_file(&data, NULL); |
| 1466 | } |
| 1467 | } |
| 1468 | |
| 1469 | upload_pack_data_clear(&data); |
| 1470 | } |
| 1471 | |
| 1472 | static int parse_want(struct packet_writer *writer, const char *line, |
| 1473 | struct object_array *want_obj) |
| 1474 | { |
| 1475 | const char *arg; |
| 1476 | if (skip_prefix(line, "want ", &arg)) { |
| 1477 | struct object_id oid; |
| 1478 | struct object *o; |
| 1479 | |
| 1480 | if (get_oid_hex(arg, &oid)) |
| 1481 | die("git upload-pack: protocol error, " |
| 1482 | "expected to get oid, not '%s'", line); |
| 1483 | |
| 1484 | o = parse_object_with_flags(the_repository, &oid, |
| 1485 | PARSE_OBJECT_SKIP_HASH_CHECK | |
| 1486 | PARSE_OBJECT_DISCARD_TREE); |
| 1487 | |
| 1488 | if (!o) { |
| 1489 | packet_writer_error(writer, |
| 1490 | "upload-pack: not our ref %s", |
| 1491 | oid_to_hex(&oid)); |
| 1492 | die("git upload-pack: not our ref %s", |
| 1493 | oid_to_hex(&oid)); |
| 1494 | } |
| 1495 | |
| 1496 | if (!(o->flags & WANTED)) { |
| 1497 | o->flags |= WANTED; |
| 1498 | add_object_array(o, NULL, want_obj); |
| 1499 | } |
| 1500 | |
| 1501 | return 1; |
| 1502 | } |
| 1503 | |
| 1504 | return 0; |
| 1505 | } |
| 1506 | |
| 1507 | static int parse_want_ref(struct packet_writer *writer, const char *line, |
| 1508 | struct strmap *wanted_refs, |
| 1509 | struct strvec *hidden_refs, |
| 1510 | struct object_array *want_obj) |
| 1511 | { |
| 1512 | const char *refname_nons; |
| 1513 | if (skip_prefix(line, "want-ref ", &refname_nons)) { |
| 1514 | struct object_id oid; |
| 1515 | struct object *o = NULL; |
| 1516 | struct strbuf refname = STRBUF_INIT; |
| 1517 | |
| 1518 | strbuf_addf(&refname, "%s%s", get_git_namespace(), refname_nons); |
| 1519 | if (ref_is_hidden(refname_nons, refname.buf, hidden_refs) || |
| 1520 | refs_read_ref(get_main_ref_store(the_repository), refname.buf, &oid)) { |
| 1521 | packet_writer_error(writer, "unknown ref %s", refname_nons); |
| 1522 | die("unknown ref %s", refname_nons); |
| 1523 | } |
| 1524 | strbuf_release(&refname); |
| 1525 | |
| 1526 | if (strmap_put(wanted_refs, refname_nons, oiddup(&oid))) { |
| 1527 | packet_writer_error(writer, "duplicate want-ref %s", |
| 1528 | refname_nons); |
| 1529 | die("duplicate want-ref %s", refname_nons); |
| 1530 | } |
| 1531 | |
| 1532 | if (!starts_with(refname_nons, "refs/tags/")) { |
| 1533 | struct commit *commit = lookup_commit_in_graph(the_repository, &oid); |
| 1534 | if (commit) |
| 1535 | o = &commit->object; |
| 1536 | } |
| 1537 | |
| 1538 | if (!o) |
| 1539 | o = parse_object_or_die(the_repository, &oid, refname_nons); |
| 1540 | |
| 1541 | if (!(o->flags & WANTED)) { |
| 1542 | o->flags |= WANTED; |
| 1543 | add_object_array(o, NULL, want_obj); |
| 1544 | } |
| 1545 | |
| 1546 | return 1; |
| 1547 | } |
| 1548 | |
| 1549 | return 0; |
| 1550 | } |
| 1551 | |
| 1552 | static int parse_have(const char *line, struct upload_pack_data *data) |
| 1553 | { |
| 1554 | const char *arg; |
| 1555 | if (skip_prefix(line, "have ", &arg)) { |
| 1556 | struct object_id oid; |
| 1557 | |
| 1558 | got_oid(data, arg, &oid); |
| 1559 | data->seen_haves = 1; |
| 1560 | return 1; |
| 1561 | } |
| 1562 | |
| 1563 | return 0; |
| 1564 | } |
| 1565 | |
| 1566 | static void trace2_fetch_info(struct upload_pack_data *data) |
| 1567 | { |
| 1568 | struct json_writer jw = JSON_WRITER_INIT; |
| 1569 | |
| 1570 | jw_object_begin(&jw, 0); |
| 1571 | jw_object_intmax(&jw, "haves", data->have_obj.nr); |
| 1572 | jw_object_intmax(&jw, "wants", data->want_obj.nr); |
| 1573 | jw_object_intmax(&jw, "want-refs", strmap_get_size(&data->wanted_refs)); |
| 1574 | jw_object_intmax(&jw, "depth", data->depth); |
| 1575 | jw_object_intmax(&jw, "shallows", data->shallows.nr); |
| 1576 | jw_object_bool(&jw, "deepen-since", data->deepen_since); |
| 1577 | jw_object_intmax(&jw, "deepen-not", oidset_size(&data->deepen_not)); |
| 1578 | jw_object_bool(&jw, "deepen-relative", data->deepen_relative); |
| 1579 | if (data->filter_options.choice) |
| 1580 | jw_object_string(&jw, "filter", list_object_filter_config_name(data->filter_options.choice)); |
| 1581 | else |
| 1582 | jw_object_null(&jw, "filter"); |
| 1583 | jw_end(&jw); |
| 1584 | |
| 1585 | trace2_data_json("upload-pack", the_repository, "fetch-info", &jw); |
| 1586 | |
| 1587 | jw_release(&jw); |
| 1588 | } |
| 1589 | |
| 1590 | static void process_args(struct packet_reader *request, |
| 1591 | struct upload_pack_data *data) |
| 1592 | { |
| 1593 | while (packet_reader_read(request) == PACKET_READ_NORMAL) { |
| 1594 | const char *arg = request->line; |
| 1595 | const char *p; |
| 1596 | |
| 1597 | /* process want */ |
| 1598 | if (parse_want(&data->writer, arg, &data->want_obj)) |
| 1599 | continue; |
| 1600 | if (data->allow_ref_in_want && |
| 1601 | parse_want_ref(&data->writer, arg, &data->wanted_refs, |
| 1602 | &data->hidden_refs, &data->want_obj)) |
| 1603 | continue; |
| 1604 | /* process have line */ |
| 1605 | if (parse_have(arg, data)) |
| 1606 | continue; |
| 1607 | |
| 1608 | /* process args like thin-pack */ |
| 1609 | if (!strcmp(arg, "thin-pack")) { |
| 1610 | data->use_thin_pack = 1; |
| 1611 | continue; |
| 1612 | } |
| 1613 | if (!strcmp(arg, "ofs-delta")) { |
| 1614 | data->use_ofs_delta = 1; |
| 1615 | continue; |
| 1616 | } |
| 1617 | if (!strcmp(arg, "no-progress")) { |
| 1618 | data->no_progress = 1; |
| 1619 | continue; |
| 1620 | } |
| 1621 | if (!strcmp(arg, "include-tag")) { |
| 1622 | data->use_include_tag = 1; |
| 1623 | continue; |
| 1624 | } |
| 1625 | if (!strcmp(arg, "done")) { |
| 1626 | data->done = 1; |
| 1627 | continue; |
| 1628 | } |
| 1629 | if (!strcmp(arg, "wait-for-done")) { |
| 1630 | data->wait_for_done = 1; |
| 1631 | continue; |
| 1632 | } |
| 1633 | |
| 1634 | /* Shallow related arguments */ |
| 1635 | if (process_shallow(arg, &data->shallows)) |
| 1636 | continue; |
| 1637 | if (process_deepen(arg, &data->depth)) |
| 1638 | continue; |
| 1639 | if (process_deepen_since(arg, &data->deepen_since, |
| 1640 | &data->deepen_rev_list)) |
| 1641 | continue; |
| 1642 | if (process_deepen_not(arg, &data->deepen_not, |
| 1643 | &data->deepen_rev_list)) |
| 1644 | continue; |
| 1645 | if (!strcmp(arg, "deepen-relative")) { |
| 1646 | data->deepen_relative = 1; |
| 1647 | continue; |
| 1648 | } |
| 1649 | |
| 1650 | if (data->allow_filter && skip_prefix(arg, "filter ", &p)) { |
| 1651 | list_objects_filter_die_if_populated(&data->filter_options); |
| 1652 | parse_list_objects_filter(&data->filter_options, p); |
| 1653 | die_if_using_banned_filter(data); |
| 1654 | continue; |
| 1655 | } |
| 1656 | |
| 1657 | if (data->allow_sideband_all && |
| 1658 | !strcmp(arg, "sideband-all")) { |
| 1659 | data->writer.use_sideband = 1; |
| 1660 | continue; |
| 1661 | } |
| 1662 | |
| 1663 | if (data->allow_packfile_uris && |
| 1664 | skip_prefix(arg, "packfile-uris ", &p)) { |
| 1665 | if (data->uri_protocols.nr) |
| 1666 | send_err_and_die(data, |
| 1667 | "multiple packfile-uris lines forbidden"); |
| 1668 | string_list_split(&data->uri_protocols, p, ",", -1); |
| 1669 | continue; |
| 1670 | } |
| 1671 | |
| 1672 | /* ignore unknown lines maybe? */ |
| 1673 | die("unexpected line: '%s'", arg); |
| 1674 | } |
| 1675 | |
| 1676 | if (data->uri_protocols.nr && !data->writer.use_sideband) |
| 1677 | string_list_clear(&data->uri_protocols, 0); |
| 1678 | |
| 1679 | if (request->status != PACKET_READ_FLUSH) |
| 1680 | die(_("expected flush after fetch arguments")); |
| 1681 | |
| 1682 | if (trace2_is_enabled()) |
| 1683 | trace2_fetch_info(data); |
| 1684 | } |
| 1685 | |
| 1686 | static int send_acks(struct upload_pack_data *data, struct object_array *acks) |
| 1687 | { |
| 1688 | int i; |
| 1689 | |
| 1690 | packet_writer_write(&data->writer, "acknowledgments\n"); |
| 1691 | |
| 1692 | /* Send Acks */ |
| 1693 | if (!acks->nr) |
| 1694 | packet_writer_write(&data->writer, "NAK\n"); |
| 1695 | |
| 1696 | for (i = 0; i < acks->nr; i++) { |
| 1697 | packet_writer_write(&data->writer, "ACK %s\n", |
| 1698 | oid_to_hex(&acks->objects[i].item->oid)); |
| 1699 | } |
| 1700 | |
| 1701 | if (!data->wait_for_done && ok_to_give_up(data)) { |
| 1702 | /* Send Ready */ |
| 1703 | packet_writer_write(&data->writer, "ready\n"); |
| 1704 | return 1; |
| 1705 | } |
| 1706 | |
| 1707 | return 0; |
| 1708 | } |
| 1709 | |
| 1710 | static int process_haves_and_send_acks(struct upload_pack_data *data) |
| 1711 | { |
| 1712 | int ret = 0; |
| 1713 | |
| 1714 | if (data->done) { |
| 1715 | ret = 1; |
| 1716 | } else if (send_acks(data, &data->have_obj)) { |
| 1717 | packet_writer_delim(&data->writer); |
| 1718 | ret = 1; |
| 1719 | } else { |
| 1720 | /* Add Flush */ |
| 1721 | packet_writer_flush(&data->writer); |
| 1722 | ret = 0; |
| 1723 | } |
| 1724 | |
| 1725 | return ret; |
| 1726 | } |
| 1727 | |
| 1728 | static void send_wanted_ref_info(struct upload_pack_data *data) |
| 1729 | { |
| 1730 | struct hashmap_iter iter; |
| 1731 | const struct strmap_entry *e; |
| 1732 | |
| 1733 | if (strmap_empty(&data->wanted_refs)) |
| 1734 | return; |
| 1735 | |
| 1736 | packet_writer_write(&data->writer, "wanted-refs\n"); |
| 1737 | |
| 1738 | strmap_for_each_entry(&data->wanted_refs, &iter, e) { |
| 1739 | packet_writer_write(&data->writer, "%s %s\n", |
| 1740 | oid_to_hex(e->value), |
| 1741 | e->key); |
| 1742 | } |
| 1743 | |
| 1744 | packet_writer_delim(&data->writer); |
| 1745 | } |
| 1746 | |
| 1747 | static void send_shallow_info(struct upload_pack_data *data) |
| 1748 | { |
| 1749 | /* No shallow info needs to be sent */ |
| 1750 | if (!data->depth && !data->deepen_rev_list && !data->shallows.nr && |
| 1751 | !is_repository_shallow(the_repository)) |
| 1752 | return; |
| 1753 | |
| 1754 | packet_writer_write(&data->writer, "shallow-info\n"); |
| 1755 | |
| 1756 | if (!send_shallow_list(data) && |
| 1757 | is_repository_shallow(the_repository)) |
| 1758 | deepen(data, INFINITE_DEPTH); |
| 1759 | |
| 1760 | packet_delim(1); |
| 1761 | } |
| 1762 | |
| 1763 | enum upload_state { |
| 1764 | UPLOAD_PROCESS_ARGS = 0, |
| 1765 | UPLOAD_SEND_ACKS, |
| 1766 | UPLOAD_SEND_PACK, |
| 1767 | UPLOAD_DONE, |
| 1768 | }; |
| 1769 | |
| 1770 | int upload_pack_v2(struct repository *r, struct packet_reader *request) |
| 1771 | { |
| 1772 | enum upload_state state = UPLOAD_PROCESS_ARGS; |
| 1773 | struct upload_pack_data data; |
| 1774 | |
| 1775 | clear_object_flags(the_repository, ALL_FLAGS); |
| 1776 | |
| 1777 | upload_pack_data_init(&data); |
| 1778 | data.use_sideband = LARGE_PACKET_MAX; |
| 1779 | get_upload_pack_config(r, &data); |
| 1780 | |
| 1781 | while (state != UPLOAD_DONE) { |
| 1782 | switch (state) { |
| 1783 | case UPLOAD_PROCESS_ARGS: |
| 1784 | process_args(request, &data); |
| 1785 | |
| 1786 | if (!data.want_obj.nr && !data.wait_for_done) { |
| 1787 | /* |
| 1788 | * Request didn't contain any 'want' lines (and |
| 1789 | * the request does not contain |
| 1790 | * "wait-for-done", in which it is reasonable |
| 1791 | * to just send 'have's without 'want's); guess |
| 1792 | * they didn't want anything. |
| 1793 | */ |
| 1794 | state = UPLOAD_DONE; |
| 1795 | } else if (data.seen_haves) { |
| 1796 | /* |
| 1797 | * Request had 'have' lines, so lets ACK them. |
| 1798 | */ |
| 1799 | state = UPLOAD_SEND_ACKS; |
| 1800 | } else { |
| 1801 | /* |
| 1802 | * Request had 'want's but no 'have's so we can |
| 1803 | * immediately go to construct and send a pack. |
| 1804 | */ |
| 1805 | state = UPLOAD_SEND_PACK; |
| 1806 | } |
| 1807 | break; |
| 1808 | case UPLOAD_SEND_ACKS: |
| 1809 | if (process_haves_and_send_acks(&data)) |
| 1810 | state = UPLOAD_SEND_PACK; |
| 1811 | else |
| 1812 | state = UPLOAD_DONE; |
| 1813 | break; |
| 1814 | case UPLOAD_SEND_PACK: |
| 1815 | send_wanted_ref_info(&data); |
| 1816 | send_shallow_info(&data); |
| 1817 | |
| 1818 | if (data.uri_protocols.nr) { |
| 1819 | create_pack_file(&data, &data.uri_protocols); |
| 1820 | } else { |
| 1821 | packet_writer_write(&data.writer, "packfile\n"); |
| 1822 | create_pack_file(&data, NULL); |
| 1823 | } |
| 1824 | state = UPLOAD_DONE; |
| 1825 | break; |
| 1826 | case UPLOAD_DONE: |
| 1827 | continue; |
| 1828 | } |
| 1829 | } |
| 1830 | |
| 1831 | upload_pack_data_clear(&data); |
| 1832 | return 0; |
| 1833 | } |
| 1834 | |
| 1835 | int upload_pack_advertise(struct repository *r, |
| 1836 | struct strbuf *value) |
| 1837 | { |
| 1838 | struct upload_pack_data data; |
| 1839 | |
| 1840 | upload_pack_data_init(&data); |
| 1841 | get_upload_pack_config(r, &data); |
| 1842 | |
| 1843 | if (value) { |
| 1844 | strbuf_addstr(value, "shallow wait-for-done"); |
| 1845 | |
| 1846 | if (data.allow_filter) |
| 1847 | strbuf_addstr(value, " filter"); |
| 1848 | |
| 1849 | if (data.allow_ref_in_want) |
| 1850 | strbuf_addstr(value, " ref-in-want"); |
| 1851 | |
| 1852 | if (data.allow_sideband_all) |
| 1853 | strbuf_addstr(value, " sideband-all"); |
| 1854 | |
| 1855 | if (data.allow_packfile_uris) |
| 1856 | strbuf_addstr(value, " packfile-uris"); |
| 1857 | } |
| 1858 | |
| 1859 | upload_pack_data_clear(&data); |
| 1860 | |
| 1861 | return 1; |
| 1862 | } |