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 "fs-util.h"
  11 #include "gcrypt-util.h"
  12 #include "hexdecoct.h"
  13 #include "import-util.h"
  14 #include "io-util.h"
  15 #include "machine-pool.h"
  16 #include "parse-util.h"
  17 #include "pull-common.h"
  18 #include "pull-job.h"
  19 #include "string-util.h"
  20 #include "strv.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         r = 0;
 276
 277 finish:
 278         pull_job_finish(j, r);
 279 }
 280
 281 static int pull_job_write_uncompressed(const void *p, size_t sz, void *userdata) {
 282         PullJob *j = userdata;
 283         bool too_much = false;
 284         int r;
 285
 286         assert(j);
 287         assert(p);
 288         assert(sz > 0);
 289
 290         if (j->written_uncompressed > UINT64_MAX - sz)
 291                 return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW), "File too large, overflow");
 292
 293         if (j->written_uncompressed >= j->uncompressed_max) {
 294                 too_much = true;
 295                 goto finish;
 296         }
 297
 298         if (j->written_uncompressed + sz > j->uncompressed_max) {
 299                 too_much = true;
 300                 sz = j->uncompressed_max - j->written_uncompressed; /* since we have the data in memory
 301                                                                      * already, we might as well write it to
 302                                                                      * disk to the max */
 303         }
 304
 305         if (j->disk_fd >= 0) {
 306
 307                 if (S_ISREG(j->disk_stat.st_mode)) {
 308                         ssize_t n;
 309
 310                         n = sparse_write(j->disk_fd, p, sz, 64);
 311                         if (n < 0)
 312                                 return log_error_errno((int) n, "Failed to write file: %m");
 313                         if ((size_t) n < sz)
 314                                 return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short write");
 315                 } else {
 316                         r = loop_write(j->disk_fd, p, sz, false);
 317                         if (r < 0)
 318                                 return log_error_errno(r, "Failed to write file: %m");
 319                 }
 320         }
 321
 322         if (j->disk_fd < 0 || j->force_memory) {
 323                 if (!GREEDY_REALLOC(j->payload, j->payload_size + sz))
 324                         return log_oom();
 325
 326                 memcpy(j->payload + j->payload_size, p, sz);
 327                 j->payload_size += sz;
 328         }
 329
 330         j->written_uncompressed += sz;
 331
 332 finish:
 333         if (too_much)
 334                 return log_error_errno(SYNTHETIC_ERRNO(EFBIG), "File overly large, refusing.");
 335
 336         return 0;
 337 }
 338
 339 static int pull_job_write_compressed(PullJob *j, void *p, size_t sz) {
 340         int r;
 341
 342         assert(j);
 343         assert(p);
 344
 345         if (sz <= 0)
 346                 return 0;
 347
 348         if (j->written_compressed + sz < j->written_compressed)
 349                 return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW), "File too large, overflow");
 350
 351         if (j->written_compressed + sz > j->compressed_max)
 352                 return log_error_errno(SYNTHETIC_ERRNO(EFBIG), "File overly large, refusing.");
 353
 354         if (j->content_length != UINT64_MAX &&
 355             j->written_compressed + sz > j->content_length)
 356                 return log_error_errno(SYNTHETIC_ERRNO(EFBIG),
 357                                        "Content length incorrect.");
 358
 359         if (j->checksum_context)
 360                 gcry_md_write(j->checksum_context, p, sz);
 361
 362         r = import_uncompress(&j->compress, p, sz, pull_job_write_uncompressed, j);
 363         if (r < 0)
 364                 return r;
 365
 366         j->written_compressed += sz;
 367
 368         return 0;
 369 }
 370
 371 static int pull_job_open_disk(PullJob *j) {
 372         int r;
 373
 374         assert(j);
 375
 376         if (j->on_open_disk) {
 377                 r = j->on_open_disk(j);
 378                 if (r < 0)
 379                         return r;
 380         }
 381
 382         if (j->disk_fd >= 0) {
 383                 if (fstat(j->disk_fd, &j->disk_stat) < 0)
 384                         return log_error_errno(errno, "Failed to stat disk file: %m");
 385
 386                 if (j->offset != UINT64_MAX) {
 387                         if (lseek(j->disk_fd, j->offset, SEEK_SET) == (off_t) -1)
 388                                 return log_error_errno(errno, "Failed to seek on file descriptor: %m");
 389                 }
 390         }
 391
 392         if (j->calc_checksum) {
 393                 initialize_libgcrypt(false);
 394
 395                 if (gcry_md_open(&j->checksum_context, GCRY_MD_SHA256, 0) != 0)
 396                         return log_error_errno(SYNTHETIC_ERRNO(EIO),
 397                                                "Failed to initialize hash context.");
 398         }
 399
 400         return 0;
 401 }
 402
 403 static int pull_job_detect_compression(PullJob *j) {
 404         _cleanup_free_ uint8_t *stub = NULL;
 405         size_t stub_size;
 406
 407         int r;
 408
 409         assert(j);
 410
 411         r = import_uncompress_detect(&j->compress, j->payload, j->payload_size);
 412         if (r < 0)
 413                 return log_error_errno(r, "Failed to initialize compressor: %m");
 414         if (r == 0)
 415                 return 0;
 416
 417         log_debug("Stream is compressed: %s", import_compress_type_to_string(j->compress.type));
 418
 419         r = pull_job_open_disk(j);
 420         if (r < 0)
 421                 return r;
 422
 423         /* Now, take the payload we read so far, and decompress it */
 424         stub = j->payload;
 425         stub_size = j->payload_size;
 426
 427         j->payload = NULL;
 428         j->payload_size = 0;
 429
 430         j->state = PULL_JOB_RUNNING;
 431
 432         r = pull_job_write_compressed(j, stub, stub_size);
 433         if (r < 0)
 434                 return r;
 435
 436         return 0;
 437 }
 438
 439 static size_t pull_job_write_callback(void *contents, size_t size, size_t nmemb, void *userdata) {
 440         PullJob *j = userdata;
 441         size_t sz = size * nmemb;
 442         int r;
 443
 444         assert(contents);
 445         assert(j);
 446
 447         switch (j->state) {
 448
 449         case PULL_JOB_ANALYZING:
 450                 /* Let's first check what it actually is */
 451
 452                 if (!GREEDY_REALLOC(j->payload, j->payload_size + sz)) {
 453                         r = log_oom();
 454                         goto fail;
 455                 }
 456
 457                 memcpy(j->payload + j->payload_size, contents, sz);
 458                 j->payload_size += sz;
 459
 460                 r = pull_job_detect_compression(j);
 461                 if (r < 0)
 462                         goto fail;
 463
 464                 break;
 465
 466         case PULL_JOB_RUNNING:
 467
 468                 r = pull_job_write_compressed(j, contents, sz);
 469                 if (r < 0)
 470                         goto fail;
 471
 472                 break;
 473
 474         case PULL_JOB_DONE:
 475         case PULL_JOB_FAILED:
 476                 r = -ESTALE;
 477                 goto fail;
 478
 479         default:
 480                 assert_not_reached();
 481         }
 482
 483         return sz;
 484
 485 fail:
 486         pull_job_finish(j, r);
 487         return 0;
 488 }
 489
 490 static int http_status_ok(CURLcode status) {
 491         /* Consider all HTTP status code in the 2xx range as OK */
 492         return status >= 200 && status <= 299;
 493 }
 494
 495 static int http_status_etag_exists(CURLcode status) {
 496         /* This one is special, it's triggered by our etag mgmt logic */
 497         return status == 304;
 498 }
 499
 500 static size_t pull_job_header_callback(void *contents, size_t size, size_t nmemb, void *userdata) {
 501         _cleanup_free_ char *length = NULL, *last_modified = NULL, *etag = NULL;
 502         size_t sz = size * nmemb;
 503         PullJob *j = userdata;
 504         CURLcode code;
 505         long status;
 506         int r;
 507
 508         assert(contents);
 509         assert(j);
 510
 511         if (IN_SET(j->state, PULL_JOB_DONE, PULL_JOB_FAILED)) {
 512                 r = -ESTALE;
 513                 goto fail;
 514         }
 515
 516         assert(j->state == PULL_JOB_ANALYZING);
 517
 518         code = curl_easy_getinfo(j->curl, CURLINFO_RESPONSE_CODE, &status);
 519         if (code != CURLE_OK) {
 520                 r = log_error_errno(SYNTHETIC_ERRNO(EIO), "Failed to retrieve response code: %s", curl_easy_strerror(code));
 521                 goto fail;
 522         }
 523
 524         if (http_status_ok(status) || http_status_etag_exists(status)) {
 525                 /* Check Etag on OK and etag exists responses. */
 526
 527                 r = curl_header_strdup(contents, sz, "ETag:", &etag);
 528                 if (r < 0) {
 529                         log_oom();
 530                         goto fail;
 531                 }
 532                 if (r > 0) {
 533                         free_and_replace(j->etag, etag);
 534
 535                         if (strv_contains(j->old_etags, j->etag)) {
 536                                 log_info("Image already downloaded. Skipping download. (%s)", j->etag);
 537                                 j->etag_exists = true;
 538                                 pull_job_finish(j, 0);
 539                                 return sz;
 540                         }
 541
 542                         return sz;
 543                 }
 544         }
 545
 546         if (!http_status_ok(status)) /* Let's ignore the rest here, these requests are probably redirects and
 547                                       * stuff where the headers aren't interesting to us */
 548                 return sz;
 549
 550         r = curl_header_strdup(contents, sz, "Content-Length:", &length);
 551         if (r < 0) {
 552                 log_oom();
 553                 goto fail;
 554         }
 555         if (r > 0) {
 556                 (void) safe_atou64(length, &j->content_length);
 557
 558                 if (j->content_length != UINT64_MAX) {
 559                         if (j->content_length > j->compressed_max) {
 560                                 r = log_error_errno(SYNTHETIC_ERRNO(EFBIG), "Content too large.");
 561                                 goto fail;
 562                         }
 563
 564                         log_info("Downloading %s for %s.", FORMAT_BYTES(j->content_length), j->url);
 565                 }
 566
 567                 return sz;
 568         }
 569
 570         r = curl_header_strdup(contents, sz, "Last-Modified:", &last_modified);
 571         if (r < 0) {
 572                 log_oom();
 573                 goto fail;
 574         }
 575         if (r > 0) {
 576                 (void) curl_parse_http_time(last_modified, &j->mtime);
 577                 return sz;
 578         }
 579
 580         if (j->on_header) {
 581                 r = j->on_header(j, contents, sz);
 582                 if (r < 0)
 583                         goto fail;
 584         }
 585
 586         return sz;
 587
 588 fail:
 589         pull_job_finish(j, r);
 590         return 0;
 591 }
 592
 593 static int pull_job_progress_callback(void *userdata, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow) {
 594         PullJob *j = userdata;
 595         unsigned percent;
 596         usec_t n;
 597
 598         assert(j);
 599
 600         if (dltotal <= 0)
 601                 return 0;
 602
 603         percent = ((100 * dlnow) / dltotal);
 604         n = now(CLOCK_MONOTONIC);
 605
 606         if (n > j->last_status_usec + USEC_PER_SEC &&
 607             percent != j->progress_percent &&
 608             dlnow < dltotal) {
 609
 610                 if (n - j->start_usec > USEC_PER_SEC && dlnow > 0) {
 611                         usec_t left, done;
 612
 613                         done = n - j->start_usec;
 614                         left = (usec_t) (((double) done * (double) dltotal) / dlnow) - done;
 615
 616                         log_info("Got %u%% of %s. %s left at %s/s.",
 617                                  percent,
 618                                  j->url,
 619                                  FORMAT_TIMESPAN(left, USEC_PER_SEC),
 620                                  FORMAT_BYTES((uint64_t) ((double) dlnow / ((double) done / (double) USEC_PER_SEC))));
 621                 } else
 622                         log_info("Got %u%% of %s.", percent, j->url);
 623
 624                 j->progress_percent = percent;
 625                 j->last_status_usec = n;
 626
 627                 if (j->on_progress)
 628                         j->on_progress(j);
 629         }
 630
 631         return 0;
 632 }
 633
 634 int pull_job_new(
 635                 PullJob **ret,
 636                 const char *url,
 637                 CurlGlue *glue,
 638                 void *userdata) {
 639
 640         _cleanup_(pull_job_unrefp) PullJob *j = NULL;
 641         _cleanup_free_ char *u = NULL;
 642
 643         assert(url);
 644         assert(glue);
 645         assert(ret);
 646
 647         u = strdup(url);
 648         if (!u)
 649                 return -ENOMEM;
 650
 651         j = new(PullJob, 1);
 652         if (!j)
 653                 return -ENOMEM;
 654
 655         *j = (PullJob) {
 656                 .state = PULL_JOB_INIT,
 657                 .disk_fd = -1,
 658                 .close_disk_fd = true,
 659                 .userdata = userdata,
 660                 .glue = glue,
 661                 .content_length = UINT64_MAX,
 662                 .start_usec = now(CLOCK_MONOTONIC),
 663                 .compressed_max = 64LLU * 1024LLU * 1024LLU * 1024LLU, /* 64GB safety limit */
 664                 .uncompressed_max = 64LLU * 1024LLU * 1024LLU * 1024LLU, /* 64GB safety limit */
 665                 .url = TAKE_PTR(u),
 666                 .offset = UINT64_MAX,
 667                 .sync = true,
 668         };
 669
 670         *ret = TAKE_PTR(j);
 671
 672         return 0;
 673 }
 674
 675 int pull_job_begin(PullJob *j) {
 676         int r;
 677
 678         assert(j);
 679
 680         if (j->state != PULL_JOB_INIT)
 681                 return -EBUSY;
 682
 683         r = curl_glue_make(&j->curl, j->url, j);
 684         if (r < 0)
 685                 return r;
 686
 687         if (!strv_isempty(j->old_etags)) {
 688                 _cleanup_free_ char *cc = NULL, *hdr = NULL;
 689
 690                 cc = strv_join(j->old_etags, ", ");
 691                 if (!cc)
 692                         return -ENOMEM;
 693
 694                 hdr = strjoin("If-None-Match: ", cc);
 695                 if (!hdr)
 696                         return -ENOMEM;
 697
 698                 if (!j->request_header) {
 699                         j->request_header = curl_slist_new(hdr, NULL);
 700                         if (!j->request_header)
 701                                 return -ENOMEM;
 702                 } else {
 703                         struct curl_slist *l;
 704
 705                         l = curl_slist_append(j->request_header, hdr);
 706                         if (!l)
 707                                 return -ENOMEM;
 708
 709                         j->request_header = l;
 710                 }
 711         }
 712
 713         if (j->request_header) {
 714                 if (curl_easy_setopt(j->curl, CURLOPT_HTTPHEADER, j->request_header) != CURLE_OK)
 715                         return -EIO;
 716         }
 717
 718         if (curl_easy_setopt(j->curl, CURLOPT_WRITEFUNCTION, pull_job_write_callback) != CURLE_OK)
 719                 return -EIO;
 720
 721         if (curl_easy_setopt(j->curl, CURLOPT_WRITEDATA, j) != CURLE_OK)
 722                 return -EIO;
 723
 724         if (curl_easy_setopt(j->curl, CURLOPT_HEADERFUNCTION, pull_job_header_callback) != CURLE_OK)
 725                 return -EIO;
 726
 727         if (curl_easy_setopt(j->curl, CURLOPT_HEADERDATA, j) != CURLE_OK)
 728                 return -EIO;
 729
 730         if (curl_easy_setopt(j->curl, CURLOPT_XFERINFOFUNCTION, pull_job_progress_callback) != CURLE_OK)
 731                 return -EIO;
 732
 733         if (curl_easy_setopt(j->curl, CURLOPT_XFERINFODATA, j) != CURLE_OK)
 734                 return -EIO;
 735
 736         if (curl_easy_setopt(j->curl, CURLOPT_NOPROGRESS, 0) != CURLE_OK)
 737                 return -EIO;
 738
 739         r = curl_glue_add(j->glue, j->curl);
 740         if (r < 0)
 741                 return r;
 742
 743         j->state = PULL_JOB_ANALYZING;
 744
 745         return 0;
 746 }