src/import/pull-job.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <fcntl.h>
   4 #include <sys/stat.h>
   5 #include <sys/xattr.h>
   6
   7 #include "alloc-util.h"
   8 #include "fd-util.h"
   9 #include "format-util.h"
  10 #include "gcrypt-util.h"
  11 #include "hexdecoct.h"
  12 #include "import-util.h"
  13 #include "io-util.h"
  14 #include "machine-pool.h"
  15 #include "parse-util.h"
  16 #include "pull-common.h"
  17 #include "pull-job.h"
  18 #include "string-util.h"
  19 #include "strv.h"
  20 #include "sync-util.h"
  21 #include "xattr-util.h"
  22
  23 void pull_job_close_disk_fd(PullJob *j) {
  24         if (!j)
  25                 return;
  26
  27         if (j->close_disk_fd)
  28                 safe_close(j->disk_fd);
  29
  30         j->disk_fd = -1;
  31 }
  32
  33 PullJob* pull_job_unref(PullJob *j) {
  34         if (!j)
  35                 return NULL;
  36
  37         pull_job_close_disk_fd(j);
  38
  39         curl_glue_remove_and_free(j->glue, j->curl);
  40         curl_slist_free_all(j->request_header);
  41
  42         import_compress_free(&j->compress);
  43
  44         if (j->checksum_context)
  45                 gcry_md_close(j->checksum_context);
  46
  47         free(j->url);
  48         free(j->etag);
  49         strv_free(j->old_etags);
  50         free(j->payload);
  51         free(j->checksum);
  52
  53         return mfree(j);
  54 }
  55
  56 static void pull_job_finish(PullJob *j, int ret) {
  57         assert(j);
  58
  59         if (IN_SET(j->state, PULL_JOB_DONE, PULL_JOB_FAILED))
  60                 return;
  61
  62         if (ret == 0) {
  63                 j->state = PULL_JOB_DONE;
  64                 j->progress_percent = 100;
  65                 log_info("Download of %s complete.", j->url);
  66         } else {
  67                 j->state = PULL_JOB_FAILED;
  68                 j->error = ret;
  69         }
  70
  71         if (j->on_finished)
  72                 j->on_finished(j);
  73 }
  74
  75 static int pull_job_restart(PullJob *j, const char *new_url) {
  76         int r;
  77
  78         assert(j);
  79         assert(new_url);
  80
  81         r = free_and_strdup(&j->url, new_url);
  82         if (r < 0)
  83                 return r;
  84
  85         j->state = PULL_JOB_INIT;
  86         j->error = 0;
  87         j->payload = mfree(j->payload);
  88         j->payload_size = 0;
  89         j->written_compressed = 0;
  90         j->written_uncompressed = 0;
  91         j->content_length = UINT64_MAX;
  92         j->etag = mfree(j->etag);
  93         j->etag_exists = false;
  94         j->mtime = 0;
  95         j->checksum = mfree(j->checksum);
  96
  97         curl_glue_remove_and_free(j->glue, j->curl);
  98         j->curl = NULL;
  99
 100         curl_slist_free_all(j->request_header);
 101         j->request_header = NULL;
 102
 103         import_compress_free(&j->compress);
 104
 105         if (j->checksum_context) {
 106                 gcry_md_close(j->checksum_context);
 107                 j->checksum_context = NULL;
 108         }
 109
 110         r = pull_job_begin(j);
 111         if (r < 0)
 112                 return r;
 113
 114         return 0;
 115 }
 116
 117 void pull_job_curl_on_finished(CurlGlue *g, CURL *curl, CURLcode result) {
 118         PullJob *j = NULL;
 119         CURLcode code;
 120         long protocol;
 121         int r;
 122
 123         if (curl_easy_getinfo(curl, CURLINFO_PRIVATE, (char **)&j) != CURLE_OK)
 124                 return;
 125
 126         if (!j || IN_SET(j->state, PULL_JOB_DONE, PULL_JOB_FAILED))
 127                 return;
 128
 129         if (result != CURLE_OK) {
 130                 r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Transfer failed: %s", curl_easy_strerror(result));
 131                 goto finish;
 132         }
 133
 134         code = curl_easy_getinfo(curl, CURLINFO_PROTOCOL, &protocol);
 135         if (code != CURLE_OK) {
 136                 r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve response code: %s", curl_easy_strerror(code));
 137                 goto finish;
 138         }
 139
 140         if (IN_SET(protocol, CURLPROTO_HTTP, CURLPROTO_HTTPS)) {
 141                 long status;
 142
 143                 code = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &status);
 144                 if (code != CURLE_OK) {
 145                         r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve response code: %s", curl_easy_strerror(code));
 146                         goto finish;
 147                 }
 148
 149                 if (status == 304) {
 150                         log_info("Image already downloaded. Skipping download.");
 151                         j->etag_exists = true;
 152                         r = 0;
 153                         goto finish;
 154                 } else if (status >= 300) {
 155
 156                         if (status == 404 && j->on_not_found) {
 157                                 _cleanup_free_ char *new_url = NULL;
 158
 159                                 /* This resource wasn't found, but the implementor wants to maybe let us know a new URL, query for it. */
 160                                 r = j->on_not_found(j, &new_url);
 161                                 if (r < 0)
 162                                         goto finish;
 163
 164                                 if (r > 0) { /* A new url to use */
 165                                         assert(new_url);
 166
 167                                         r = pull_job_restart(j, new_url);
 168                                         if (r < 0)
 169                                                 goto finish;
 170
 171                                         code = curl_easy_getinfo(j->curl, CURLINFO_RESPONSE_CODE, &status);
 172                                         if (code != CURLE_OK) {
 173                                                 r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve response code: %s", curl_easy_strerror(code));
 174                                                 goto finish;
 175                                         }
 176
 177                                         if (status == 0)
 178                                                 return;
 179                                 }
 180                         }
 181
 182                         r = log_error_errno(
 183                                         status == 404 ? SYNTHETIC_ERRNO(ENOMEDIUM) : SYNTHETIC_ERRNO(EIO), /* Make the most common error recognizable */
 184                                         "HTTP request to %s failed with code %li.", j->url, status);
 185                         goto finish;
 186                 } else if (status < 200) {
 187                         r = log_error_errno(SYNTHETIC_ERRNO(EIO), "HTTP request to %s finished with unexpected code %li.", j->url, status);
 188                         goto finish;
 189                 }
 190         }
 191
 192         if (j->state != PULL_JOB_RUNNING) {
 193                 r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Premature connection termination.");
 194                 goto finish;
 195         }
 196
 197         if (j->content_length != UINT64_MAX &&
 198             j->content_length != j->written_compressed) {
 199                 r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Download truncated.");
 200                 goto finish;
 201         }
 202
 203         if (j->checksum_context) {
 204                 uint8_t *k;
 205
 206                 k = gcry_md_read(j->checksum_context, GCRY_MD_SHA256);
 207                 if (!k) {
 208                         r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to get checksum.");
 209                         goto finish;
 210                 }
 211
 212                 j->checksum = hexmem(k, gcry_md_get_algo_dlen(GCRY_MD_SHA256));
 213                 if (!j->checksum) {
 214                         r = log_oom();
 215                         goto finish;
 216                 }
 217
 218                 log_debug("SHA256 of %s is %s.", j->url, j->checksum);
 219         }
 220
 221         /* Do a couple of finishing disk operations, but only if we are the sole owner of the file (i.e. no
 222          * offset is specified, which indicates we only own the file partially) */
 223
 224         if (j->disk_fd >= 0) {
 225
 226                 if (S_ISREG(j->disk_stat.st_mode)) {
 227
 228                         if (j->offset == UINT64_MAX) {
 229
 230                                 if (j->written_compressed > 0) {
 231                                         /* Make sure the file size is right, in case the file was sparse and we just seeked
 232                                          * for the last part */
 233                                         if (ftruncate(j->disk_fd, j->written_uncompressed) < 0) {
 234                                                 r = log_error_errno(errno, "Failed to truncate file: %m");
 235                                                 goto finish;
 236                                         }
 237                                 }
 238
 239                                 if (j->etag)
 240                                         (void) fsetxattr(j->disk_fd, "user.source_etag", j->etag, strlen(j->etag), 0);
 241                                 if (j->url)
 242                                         (void) fsetxattr(j->disk_fd, "user.source_url", j->url, strlen(j->url), 0);
 243
 244                                 if (j->mtime != 0) {
 245                                         struct timespec ut;
 246
 247                                         timespec_store(&ut, j->mtime);
 248
 249                                         if (futimens(j->disk_fd, (struct timespec[]) { ut, ut }) < 0)
 250                                                 log_debug_errno(errno, "Failed to adjust atime/mtime of created image, ignoring: %m");
 251
 252                                         r = fd_setcrtime(j->disk_fd, j->mtime);
 253                                         if (r < 0)
 254                                                 log_debug_errno(r, "Failed to adjust crtime of created image, ignoring: %m");
 255                                 }
 256                         }
 257
 258                         if (j->sync) {
 259                                 r = fsync_full(j->disk_fd);
 260                                 if (r < 0) {
 261                                         log_error_errno(r, "Failed to synchronize file to disk: %m");
 262                                         goto finish;
 263                                 }
 264                         }
 265
 266                 } else if (S_ISBLK(j->disk_stat.st_mode) && j->sync) {
 267
 268                         if (fsync(j->disk_fd) < 0) {
 269                                 r = log_error_errno(errno, "Failed to synchronize block device: %m");
 270                                 goto finish;
 271                         }
 272                 }
 273         }
 274
 275         log_info("Acquired %s.", FORMAT_BYTES(j->written_uncompressed));
 276
 277         r = 0;
 278
 279 finish:
 280         pull_job_finish(j, r);
 281 }
 282
 283 static int pull_job_write_uncompressed(const void *p, size_t sz, void *userdata) {
 284         PullJob *j = userdata;
 285         bool too_much = false;
 286         int r;
 287
 288         assert(j);
 289         assert(p);
 290         assert(sz > 0);
 291
 292         if (j->written_uncompressed > UINT64_MAX - sz)
 293                 return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW), "File too large, overflow");
 294
 295         if (j->written_uncompressed >= j->uncompressed_max) {
 296                 too_much = true;
 297                 goto finish;
 298         }
 299
 300         if (j->written_uncompressed + sz > j->uncompressed_max) {
 301                 too_much = true;
 302                 sz = j->uncompressed_max - j->written_uncompressed; /* since we have the data in memory
 303                                                                      * already, we might as well write it to
 304                                                                      * disk to the max */
 305         }
 306
 307         if (j->disk_fd >= 0) {
 308
 309                 if (S_ISREG(j->disk_stat.st_mode) && j->offset == UINT64_MAX) {
 310                         ssize_t n;
 311
 312                         n = sparse_write(j->disk_fd, p, sz, 64);
 313                         if (n < 0)
 314                                 return log_error_errno((int) n, "Failed to write file: %m");
 315                         if ((size_t) n < sz)
 316                                 return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short write");
 317                 } else {
 318                         r = loop_write(j->disk_fd, p, sz, false);
 319                         if (r < 0)
 320                                 return log_error_errno(r, "Failed to write file: %m");
 321                 }
 322         }
 323
 324         if (j->disk_fd < 0 || j->force_memory) {
 325                 if (!GREEDY_REALLOC(j->payload, j->payload_size + sz))
 326                         return log_oom();
 327
 328                 memcpy(j->payload + j->payload_size, p, sz);
 329                 j->payload_size += sz;
 330         }
 331
 332         j->written_uncompressed += sz;
 333
 334 finish:
 335         if (too_much)
 336                 return log_error_errno(SYNTHETIC_ERRNO(EFBIG), "File overly large, refusing.");
 337
 338         return 0;
 339 }
 340
 341 static int pull_job_write_compressed(PullJob *j, void *p, size_t sz) {
 342         int r;
 343
 344         assert(j);
 345         assert(p);
 346
 347         if (sz <= 0)
 348                 return 0;
 349
 350         if (j->written_compressed + sz < j->written_compressed)
 351                 return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW), "File too large, overflow");
 352
 353         if (j->written_compressed + sz > j->compressed_max)
 354                 return log_error_errno(SYNTHETIC_ERRNO(EFBIG), "File overly large, refusing.");
 355
 356         if (j->content_length != UINT64_MAX &&
 357             j->written_compressed + sz > j->content_length)
 358                 return log_error_errno(SYNTHETIC_ERRNO(EFBIG),
 359                                        "Content length incorrect.");
 360
 361         if (j->checksum_context)
 362                 gcry_md_write(j->checksum_context, p, sz);
 363
 364         r = import_uncompress(&j->compress, p, sz, pull_job_write_uncompressed, j);
 365         if (r < 0)
 366                 return r;
 367
 368         j->written_compressed += sz;
 369
 370         return 0;
 371 }
 372
 373 static int pull_job_open_disk(PullJob *j) {
 374         int r;
 375
 376         assert(j);
 377
 378         if (j->on_open_disk) {
 379                 r = j->on_open_disk(j);
 380                 if (r < 0)
 381                         return r;
 382         }
 383
 384         if (j->disk_fd >= 0) {
 385                 if (fstat(j->disk_fd, &j->disk_stat) < 0)
 386                         return log_error_errno(errno, "Failed to stat disk file: %m");
 387
 388                 if (j->offset != UINT64_MAX) {
 389                         if (lseek(j->disk_fd, j->offset, SEEK_SET) == (off_t) -1)
 390                                 return log_error_errno(errno, "Failed to seek on file descriptor: %m");
 391                 }
 392         }
 393
 394         if (j->calc_checksum) {
 395                 initialize_libgcrypt(false);
 396
 397                 if (gcry_md_open(&j->checksum_context, GCRY_MD_SHA256, 0) != 0)
 398                         return log_error_errno(SYNTHETIC_ERRNO(EIO),
 399                                                "Failed to initialize hash context.");
 400         }
 401
 402         return 0;
 403 }
 404
 405 static int pull_job_detect_compression(PullJob *j) {
 406         _cleanup_free_ uint8_t *stub = NULL;
 407         size_t stub_size;
 408
 409         int r;
 410
 411         assert(j);
 412
 413         r = import_uncompress_detect(&j->compress, j->payload, j->payload_size);
 414         if (r < 0)
 415                 return log_error_errno(r, "Failed to initialize compressor: %m");
 416         if (r == 0)
 417                 return 0;
 418
 419         log_debug("Stream is compressed: %s", import_compress_type_to_string(j->compress.type));
 420
 421         r = pull_job_open_disk(j);
 422         if (r < 0)
 423                 return r;
 424
 425         /* Now, take the payload we read so far, and decompress it */
 426         stub = j->payload;
 427         stub_size = j->payload_size;
 428
 429         j->payload = NULL;
 430         j->payload_size = 0;
 431
 432         j->state = PULL_JOB_RUNNING;
 433
 434         r = pull_job_write_compressed(j, stub, stub_size);
 435         if (r < 0)
 436                 return r;
 437
 438         return 0;
 439 }
 440
 441 static size_t pull_job_write_callback(void *contents, size_t size, size_t nmemb, void *userdata) {
 442         PullJob *j = userdata;
 443         size_t sz = size * nmemb;
 444         int r;
 445
 446         assert(contents);
 447         assert(j);
 448
 449         switch (j->state) {
 450
 451         case PULL_JOB_ANALYZING:
 452                 /* Let's first check what it actually is */
 453
 454                 if (!GREEDY_REALLOC(j->payload, j->payload_size + sz)) {
 455                         r = log_oom();
 456                         goto fail;
 457                 }
 458
 459                 memcpy(j->payload + j->payload_size, contents, sz);
 460                 j->payload_size += sz;
 461
 462                 r = pull_job_detect_compression(j);
 463                 if (r < 0)
 464                         goto fail;
 465
 466                 break;
 467
 468         case PULL_JOB_RUNNING:
 469
 470                 r = pull_job_write_compressed(j, contents, sz);
 471                 if (r < 0)
 472                         goto fail;
 473
 474                 break;
 475
 476         case PULL_JOB_DONE:
 477         case PULL_JOB_FAILED:
 478                 r = -ESTALE;
 479                 goto fail;
 480
 481         default:
 482                 assert_not_reached();
 483         }
 484
 485         return sz;
 486
 487 fail:
 488         pull_job_finish(j, r);
 489         return 0;
 490 }
 491
 492 static int http_status_ok(CURLcode status) {
 493         /* Consider all HTTP status code in the 2xx range as OK */
 494         return status >= 200 && status <= 299;
 495 }
 496
 497 static int http_status_etag_exists(CURLcode status) {
 498         /* This one is special, it's triggered by our etag mgmt logic */
 499         return status == 304;
 500 }
 501
 502 static size_t pull_job_header_callback(void *contents, size_t size, size_t nmemb, void *userdata) {
 503         _cleanup_free_ char *length = NULL, *last_modified = NULL, *etag = NULL;
 504         size_t sz = size * nmemb;
 505         PullJob *j = userdata;
 506         CURLcode code;
 507         long status;
 508         int r;
 509
 510         assert(contents);
 511         assert(j);
 512
 513         if (IN_SET(j->state, PULL_JOB_DONE, PULL_JOB_FAILED)) {
 514                 r = -ESTALE;
 515                 goto fail;
 516         }
 517
 518         assert(j->state == PULL_JOB_ANALYZING);
 519
 520         code = curl_easy_getinfo(j->curl, CURLINFO_RESPONSE_CODE, &status);
 521         if (code != CURLE_OK) {
 522                 r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve response code: %s", curl_easy_strerror(code));
 523                 goto fail;
 524         }
 525
 526         if (http_status_ok(status) || http_status_etag_exists(status)) {
 527                 /* Check Etag on OK and etag exists responses. */
 528
 529                 r = curl_header_strdup(contents, sz, "ETag:", &etag);
 530                 if (r < 0) {
 531                         log_oom();
 532                         goto fail;
 533                 }
 534                 if (r > 0) {
 535                         free_and_replace(j->etag, etag);
 536
 537                         if (strv_contains(j->old_etags, j->etag)) {
 538                                 log_info("Image already downloaded. Skipping download. (%s)", j->etag);
 539                                 j->etag_exists = true;
 540                                 pull_job_finish(j, 0);
 541                                 return sz;
 542                         }
 543
 544                         return sz;
 545                 }
 546         }
 547
 548         if (!http_status_ok(status)) /* Let's ignore the rest here, these requests are probably redirects and
 549                                       * stuff where the headers aren't interesting to us */
 550                 return sz;
 551
 552         r = curl_header_strdup(contents, sz, "Content-Length:", &length);
 553         if (r < 0) {
 554                 log_oom();
 555                 goto fail;
 556         }
 557         if (r > 0) {
 558                 (void) safe_atou64(length, &j->content_length);
 559
 560                 if (j->content_length != UINT64_MAX) {
 561                         if (j->content_length > j->compressed_max) {
 562                                 r = log_error_errno(SYNTHETIC_ERRNO(EFBIG), "Content too large.");
 563                                 goto fail;
 564                         }
 565
 566                         log_info("Downloading %s for %s.", FORMAT_BYTES(j->content_length), j->url);
 567                 }
 568
 569                 return sz;
 570         }
 571
 572         r = curl_header_strdup(contents, sz, "Last-Modified:", &last_modified);
 573         if (r < 0) {
 574                 log_oom();
 575                 goto fail;
 576         }
 577         if (r > 0) {
 578                 (void) curl_parse_http_time(last_modified, &j->mtime);
 579                 return sz;
 580         }
 581
 582         if (j->on_header) {
 583                 r = j->on_header(j, contents, sz);
 584                 if (r < 0)
 585                         goto fail;
 586         }
 587
 588         return sz;
 589
 590 fail:
 591         pull_job_finish(j, r);
 592         return 0;
 593 }
 594
 595 static int pull_job_progress_callback(void *userdata, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow) {
 596         PullJob *j = userdata;
 597         unsigned percent;
 598         usec_t n;
 599
 600         assert(j);
 601
 602         if (dltotal <= 0)
 603                 return 0;
 604
 605         percent = ((100 * dlnow) / dltotal);
 606         n = now(CLOCK_MONOTONIC);
 607
 608         if (n > j->last_status_usec + USEC_PER_SEC &&
 609             percent != j->progress_percent &&
 610             dlnow < dltotal) {
 611
 612                 if (n - j->start_usec > USEC_PER_SEC && dlnow > 0) {
 613                         usec_t left, done;
 614
 615                         done = n - j->start_usec;
 616                         left = (usec_t) (((double) done * (double) dltotal) / dlnow) - done;
 617
 618                         log_info("Got %u%% of %s. %s left at %s/s.",
 619                                  percent,
 620                                  j->url,
 621                                  FORMAT_TIMESPAN(left, USEC_PER_SEC),
 622                                  FORMAT_BYTES((uint64_t) ((double) dlnow / ((double) done / (double) USEC_PER_SEC))));
 623                 } else
 624                         log_info("Got %u%% of %s.", percent, j->url);
 625
 626                 j->progress_percent = percent;
 627                 j->last_status_usec = n;
 628
 629                 if (j->on_progress)
 630                         j->on_progress(j);
 631         }
 632
 633         return 0;
 634 }
 635
 636 int pull_job_new(
 637                 PullJob **ret,
 638                 const char *url,
 639                 CurlGlue *glue,
 640                 void *userdata) {
 641
 642         _cleanup_(pull_job_unrefp) PullJob *j = NULL;
 643         _cleanup_free_ char *u = NULL;
 644
 645         assert(url);
 646         assert(glue);
 647         assert(ret);
 648
 649         u = strdup(url);
 650         if (!u)
 651                 return -ENOMEM;
 652
 653         j = new(PullJob, 1);
 654         if (!j)
 655                 return -ENOMEM;
 656
 657         *j = (PullJob) {
 658                 .state = PULL_JOB_INIT,
 659                 .disk_fd = -1,
 660                 .close_disk_fd = true,
 661                 .userdata = userdata,
 662                 .glue = glue,
 663                 .content_length = UINT64_MAX,
 664                 .start_usec = now(CLOCK_MONOTONIC),
 665                 .compressed_max = 64LLU * 1024LLU * 1024LLU * 1024LLU, /* 64GB safety limit */
 666                 .uncompressed_max = 64LLU * 1024LLU * 1024LLU * 1024LLU, /* 64GB safety limit */
 667                 .url = TAKE_PTR(u),
 668                 .offset = UINT64_MAX,
 669                 .sync = true,
 670         };
 671
 672         *ret = TAKE_PTR(j);
 673
 674         return 0;
 675 }
 676
 677 int pull_job_begin(PullJob *j) {
 678         int r;
 679
 680         assert(j);
 681
 682         if (j->state != PULL_JOB_INIT)
 683                 return -EBUSY;
 684
 685         r = curl_glue_make(&j->curl, j->url, j);
 686         if (r < 0)
 687                 return r;
 688
 689         if (!strv_isempty(j->old_etags)) {
 690                 _cleanup_free_ char *cc = NULL, *hdr = NULL;
 691
 692                 cc = strv_join(j->old_etags, ", ");
 693                 if (!cc)
 694                         return -ENOMEM;
 695
 696                 hdr = strjoin("If-None-Match: ", cc);
 697                 if (!hdr)
 698                         return -ENOMEM;
 699
 700                 if (!j->request_header) {
 701                         j->request_header = curl_slist_new(hdr, NULL);
 702                         if (!j->request_header)
 703                                 return -ENOMEM;
 704                 } else {
 705                         struct curl_slist *l;
 706
 707                         l = curl_slist_append(j->request_header, hdr);
 708                         if (!l)
 709                                 return -ENOMEM;
 710
 711                         j->request_header = l;
 712                 }
 713         }
 714
 715         if (j->request_header) {
 716                 if (curl_easy_setopt(j->curl, CURLOPT_HTTPHEADER, j->request_header) != CURLE_OK)
 717                         return -EIO;
 718         }
 719
 720         if (curl_easy_setopt(j->curl, CURLOPT_WRITEFUNCTION, pull_job_write_callback) != CURLE_OK)
 721                 return -EIO;
 722
 723         if (curl_easy_setopt(j->curl, CURLOPT_WRITEDATA, j) != CURLE_OK)
 724                 return -EIO;
 725
 726         if (curl_easy_setopt(j->curl, CURLOPT_HEADERFUNCTION, pull_job_header_callback) != CURLE_OK)
 727                 return -EIO;
 728
 729         if (curl_easy_setopt(j->curl, CURLOPT_HEADERDATA, j) != CURLE_OK)
 730                 return -EIO;
 731
 732         if (curl_easy_setopt(j->curl, CURLOPT_XFERINFOFUNCTION, pull_job_progress_callback) != CURLE_OK)
 733                 return -EIO;
 734
 735         if (curl_easy_setopt(j->curl, CURLOPT_XFERINFODATA, j) != CURLE_OK)
 736                 return -EIO;
 737
 738         if (curl_easy_setopt(j->curl, CURLOPT_NOPROGRESS, 0) != CURLE_OK)
 739                 return -EIO;
 740
 741         r = curl_glue_add(j->glue, j->curl);
 742         if (r < 0)
 743                 return r;
 744
 745         j->state = PULL_JOB_ANALYZING;
 746
 747         return 0;
 748 }