libmultipath/config.c

   1 /*
   2  * Copyright (c) 2004, 2005 Christophe Varoqui
   3  * Copyright (c) 2005 Benjamin Marzinski, Redhat
   4  * Copyright (c) 2005 Edward Goggin, EMC
   5  */
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <libudev.h>
   9 #include <dirent.h>
  10 #include <limits.h>
  11 #include <errno.h>
  12
  13 #include "checkers.h"
  14 #include "memory.h"
  15 #include "util.h"
  16 #include "debug.h"
  17 #include "parser.h"
  18 #include "dict.h"
  19 #include "hwtable.h"
  20 #include "vector.h"
  21 #include "structs.h"
  22 #include "config.h"
  23 #include "blacklist.h"
  24 #include "defaults.h"
  25 #include "prio.h"
  26 #include "devmapper.h"
  27 #include "mpath_cmd.h"
  28 #include "propsel.h"
  29
  30 static int
  31 hwe_strmatch (const struct hwentry *hwe1, const struct hwentry *hwe2)
  32 {
  33         if ((hwe2->vendor && !hwe1->vendor) ||
  34             (hwe1->vendor && (!hwe2->vendor ||
  35                               strcmp(hwe1->vendor, hwe2->vendor))))
  36                 return 1;
  37
  38         if ((hwe2->product && !hwe1->product) ||
  39             (hwe1->product && (!hwe2->product ||
  40                               strcmp(hwe1->product, hwe2->product))))
  41                 return 1;
  42
  43         if ((hwe2->revision && !hwe1->revision) ||
  44             (hwe1->revision && (!hwe2->revision ||
  45                               strcmp(hwe1->revision, hwe2->revision))))
  46                 return 1;
  47
  48         return 0;
  49 }
  50
  51 static struct hwentry *
  52 find_hwe_strmatch (const struct _vector *hwtable, const struct hwentry *hwe)
  53 {
  54         int i;
  55         struct hwentry *tmp, *ret = NULL;
  56
  57         vector_foreach_slot (hwtable, tmp, i) {
  58                 if (hwe_strmatch(tmp, hwe))
  59                         continue;
  60                 ret = tmp;
  61                 break;
  62         }
  63         return ret;
  64 }
  65
  66 static int
  67 hwe_regmatch (const struct hwentry *hwe1, const char *vendor,
  68               const char *product, const char *revision)
  69 {
  70         regex_t vre, pre, rre;
  71         int retval = 1;
  72
  73         if (hwe1->vendor &&
  74             regcomp(&vre, hwe1->vendor, REG_EXTENDED|REG_NOSUB))
  75                 goto out;
  76
  77         if (hwe1->product &&
  78             regcomp(&pre, hwe1->product, REG_EXTENDED|REG_NOSUB))
  79                 goto out_vre;
  80
  81         if (hwe1->revision &&
  82             regcomp(&rre, hwe1->revision, REG_EXTENDED|REG_NOSUB))
  83                 goto out_pre;
  84
  85         if ((vendor || product || revision) &&
  86             (!hwe1->vendor || !vendor ||
  87              !regexec(&vre, vendor, 0, NULL, 0)) &&
  88             (!hwe1->product || !product ||
  89              !regexec(&pre, product, 0, NULL, 0)) &&
  90             (!hwe1->revision || !revision ||
  91              !regexec(&rre, revision, 0, NULL, 0)))
  92                 retval = 0;
  93
  94         if (hwe1->revision)
  95                 regfree(&rre);
  96 out_pre:
  97         if (hwe1->product)
  98                 regfree(&pre);
  99 out_vre:
 100         if (hwe1->vendor)
 101                 regfree(&vre);
 102 out:
 103         return retval;
 104 }
 105
 106 static void _log_match(const char *fn, const struct hwentry *h,
 107                        const char *vendor, const char *product,
 108                        const char *revision)
 109 {
 110         condlog(4, "%s: found match /%s:%s:%s/ for '%s:%s:%s'", fn,
 111                 h->vendor, h->product, h->revision,
 112                 vendor, product, revision);
 113 }
 114 #define log_match(h, v, p, r) _log_match(__func__, (h), (v), (p), (r))
 115
 116 int
 117 find_hwe (const struct _vector *hwtable,
 118           const char * vendor, const char * product, const char * revision,
 119           vector result)
 120 {
 121         int i, n = 0;
 122         struct hwentry *tmp;
 123
 124         /*
 125          * Search backwards here, and add forward.
 126          * User modified entries are attached at the end of
 127          * the list, so we have to check them first before
 128          * continuing to the generic entries
 129          */
 130         vector_reset(result);
 131         vector_foreach_slot_backwards (hwtable, tmp, i) {
 132                 if (hwe_regmatch(tmp, vendor, product, revision))
 133                         continue;
 134                 if (vector_alloc_slot(result) != NULL) {
 135                         vector_set_slot(result, tmp);
 136                         n++;
 137                 }
 138                 log_match(tmp, vendor, product, revision);
 139         }
 140         condlog(n > 1 ? 3 : 4, "%s: found %d hwtable matches for %s:%s:%s",
 141                 __func__, n, vendor, product, revision);
 142         return n;
 143 }
 144
 145 struct mpentry *find_mpe(vector mptable, char *wwid)
 146 {
 147         int i;
 148         struct mpentry * mpe;
 149
 150         if (!wwid)
 151                 return NULL;
 152
 153         vector_foreach_slot (mptable, mpe, i)
 154                 if (mpe->wwid && !strcmp(mpe->wwid, wwid))
 155                         return mpe;
 156
 157         return NULL;
 158 }
 159
 160 char *get_mpe_wwid(vector mptable, char *alias)
 161 {
 162         int i;
 163         struct mpentry * mpe;
 164
 165         if (!alias)
 166                 return NULL;
 167
 168         vector_foreach_slot (mptable, mpe, i)
 169                 if (mpe->alias && strcmp(mpe->alias, alias) == 0)
 170                         return mpe->wwid;
 171
 172         return NULL;
 173 }
 174
 175 void
 176 free_hwe (struct hwentry * hwe)
 177 {
 178         if (!hwe)
 179                 return;
 180
 181         if (hwe->vendor)
 182                 FREE(hwe->vendor);
 183
 184         if (hwe->product)
 185                 FREE(hwe->product);
 186
 187         if (hwe->revision)
 188                 FREE(hwe->revision);
 189
 190         if (hwe->getuid)
 191                 FREE(hwe->getuid);
 192
 193         if (hwe->uid_attribute)
 194                 FREE(hwe->uid_attribute);
 195
 196         if (hwe->features)
 197                 FREE(hwe->features);
 198
 199         if (hwe->hwhandler)
 200                 FREE(hwe->hwhandler);
 201
 202         if (hwe->selector)
 203                 FREE(hwe->selector);
 204
 205         if (hwe->checker_name)
 206                 FREE(hwe->checker_name);
 207
 208         if (hwe->prio_name)
 209                 FREE(hwe->prio_name);
 210
 211         if (hwe->prio_args)
 212                 FREE(hwe->prio_args);
 213
 214         if (hwe->alias_prefix)
 215                 FREE(hwe->alias_prefix);
 216
 217         if (hwe->bl_product)
 218                 FREE(hwe->bl_product);
 219
 220         FREE(hwe);
 221 }
 222
 223 void
 224 free_hwtable (vector hwtable)
 225 {
 226         int i;
 227         struct hwentry * hwe;
 228
 229         if (!hwtable)
 230                 return;
 231
 232         vector_foreach_slot (hwtable, hwe, i)
 233                 free_hwe(hwe);
 234
 235         vector_free(hwtable);
 236 }
 237
 238 void
 239 free_mpe (struct mpentry * mpe)
 240 {
 241         if (!mpe)
 242                 return;
 243
 244         if (mpe->wwid)
 245                 FREE(mpe->wwid);
 246
 247         if (mpe->selector)
 248                 FREE(mpe->selector);
 249
 250         if (mpe->getuid)
 251                 FREE(mpe->getuid);
 252
 253         if (mpe->uid_attribute)
 254                 FREE(mpe->uid_attribute);
 255
 256         if (mpe->alias)
 257                 FREE(mpe->alias);
 258
 259         if (mpe->prio_name)
 260                 FREE(mpe->prio_name);
 261
 262         if (mpe->prio_args)
 263                 FREE(mpe->prio_args);
 264
 265         FREE(mpe);
 266 }
 267
 268 void
 269 free_mptable (vector mptable)
 270 {
 271         int i;
 272         struct mpentry * mpe;
 273
 274         if (!mptable)
 275                 return;
 276
 277         vector_foreach_slot (mptable, mpe, i)
 278                 free_mpe(mpe);
 279
 280         vector_free(mptable);
 281 }
 282
 283 struct mpentry *
 284 alloc_mpe (void)
 285 {
 286         struct mpentry * mpe = (struct mpentry *)
 287                                 MALLOC(sizeof(struct mpentry));
 288
 289         return mpe;
 290 }
 291
 292 struct hwentry *
 293 alloc_hwe (void)
 294 {
 295         struct hwentry * hwe = (struct hwentry *)
 296                                 MALLOC(sizeof(struct hwentry));
 297
 298         return hwe;
 299 }
 300
 301 static char *
 302 set_param_str(const char * str)
 303 {
 304         char * dst;
 305         int len;
 306
 307         if (!str)
 308                 return NULL;
 309
 310         len = strlen(str);
 311
 312         if (!len)
 313                 return NULL;
 314
 315         dst = (char *)MALLOC(len + 1);
 316
 317         if (!dst)
 318                 return NULL;
 319
 320         strcpy(dst, str);
 321         return dst;
 322 }
 323
 324 #define merge_str(s) \
 325         if (!dst->s && src->s) { \
 326                 if (!(dst->s = set_param_str(src->s))) \
 327                         return 1; \
 328         }
 329
 330 #define merge_num(s) \
 331         if (!dst->s && src->s) \
 332                 dst->s = src->s
 333
 334
 335 static int
 336 merge_hwe (struct hwentry * dst, struct hwentry * src)
 337 {
 338         char id[SCSI_VENDOR_SIZE+PATH_PRODUCT_SIZE];
 339         merge_str(vendor);
 340         merge_str(product);
 341         merge_str(revision);
 342         merge_str(getuid);
 343         merge_str(uid_attribute);
 344         merge_str(features);
 345         merge_str(hwhandler);
 346         merge_str(selector);
 347         merge_str(checker_name);
 348         merge_str(prio_name);
 349         merge_str(prio_args);
 350         merge_str(alias_prefix);
 351         merge_str(bl_product);
 352         merge_num(pgpolicy);
 353         merge_num(pgfailback);
 354         merge_num(rr_weight);
 355         merge_num(no_path_retry);
 356         merge_num(minio);
 357         merge_num(minio_rq);
 358         merge_num(flush_on_last_del);
 359         merge_num(fast_io_fail);
 360         merge_num(dev_loss);
 361         merge_num(user_friendly_names);
 362         merge_num(retain_hwhandler);
 363         merge_num(detect_prio);
 364         merge_num(detect_checker);
 365         merge_num(deferred_remove);
 366         merge_num(delay_watch_checks);
 367         merge_num(delay_wait_checks);
 368         merge_num(skip_kpartx);
 369         merge_num(max_sectors_kb);
 370         merge_num(ghost_delay);
 371         merge_num(all_tg_pt);
 372
 373         snprintf(id, sizeof(id), "%s/%s", dst->vendor, dst->product);
 374         reconcile_features_with_options(id, &dst->features,
 375                                         &dst->no_path_retry,
 376                                         &dst->retain_hwhandler);
 377         return 0;
 378 }
 379
 380 static int
 381 merge_mpe(struct mpentry *dst, struct mpentry *src)
 382 {
 383         if (!dst || !src)
 384                 return 1;
 385
 386         merge_str(alias);
 387         merge_str(uid_attribute);
 388         merge_str(getuid);
 389         merge_str(selector);
 390         merge_str(features);
 391         merge_str(prio_name);
 392         merge_str(prio_args);
 393
 394         if (dst->prkey_source == PRKEY_SOURCE_NONE &&
 395             src->prkey_source != PRKEY_SOURCE_NONE) {
 396                 dst->prkey_source = src->prkey_source;
 397                 memcpy(&dst->reservation_key, &src->reservation_key,
 398                        sizeof(dst->reservation_key));
 399         }
 400
 401         merge_num(pgpolicy);
 402         merge_num(pgfailback);
 403         merge_num(rr_weight);
 404         merge_num(no_path_retry);
 405         merge_num(minio);
 406         merge_num(minio_rq);
 407         merge_num(flush_on_last_del);
 408         merge_num(attribute_flags);
 409         merge_num(user_friendly_names);
 410         merge_num(deferred_remove);
 411         merge_num(delay_watch_checks);
 412         merge_num(delay_wait_checks);
 413         merge_num(marginal_path_err_sample_time);
 414         merge_num(marginal_path_err_rate_threshold);
 415         merge_num(marginal_path_err_recheck_gap_time);
 416         merge_num(marginal_path_double_failed_time);
 417         merge_num(skip_kpartx);
 418         merge_num(max_sectors_kb);
 419         merge_num(ghost_delay);
 420         merge_num(uid);
 421         merge_num(gid);
 422         merge_num(mode);
 423
 424         return 0;
 425 }
 426
 427 void merge_mptable(vector mptable)
 428 {
 429         struct mpentry *mp1, *mp2;
 430         int i, j;
 431
 432         vector_foreach_slot(mptable, mp1, i) {
 433                 j = i + 1;
 434                 vector_foreach_slot_after(mptable, mp2, j) {
 435                         if (strcmp(mp1->wwid, mp2->wwid))
 436                                 continue;
 437                         condlog(1, "%s: duplicate multipath config section for %s",
 438                                 __func__, mp1->wwid);
 439                         merge_mpe(mp2, mp1);
 440                         free_mpe(mp1);
 441                         vector_del_slot(mptable, i);
 442                         i--;
 443                         break;
 444                 }
 445         }
 446 }
 447
 448 int
 449 store_hwe (vector hwtable, struct hwentry * dhwe)
 450 {
 451         struct hwentry * hwe;
 452
 453         if (find_hwe_strmatch(hwtable, dhwe))
 454                 return 0;
 455
 456         if (!(hwe = alloc_hwe()))
 457                 return 1;
 458
 459         if (!dhwe->vendor || !(hwe->vendor = set_param_str(dhwe->vendor)))
 460                 goto out;
 461
 462         if (!dhwe->product || !(hwe->product = set_param_str(dhwe->product)))
 463                 goto out;
 464
 465         if (dhwe->revision && !(hwe->revision = set_param_str(dhwe->revision)))
 466                 goto out;
 467
 468         if (dhwe->uid_attribute && !(hwe->uid_attribute = set_param_str(dhwe->uid_attribute)))
 469                 goto out;
 470
 471         if (dhwe->getuid && !(hwe->getuid = set_param_str(dhwe->getuid)))
 472                 goto out;
 473
 474         if (dhwe->features && !(hwe->features = set_param_str(dhwe->features)))
 475                 goto out;
 476
 477         if (dhwe->hwhandler && !(hwe->hwhandler = set_param_str(dhwe->hwhandler)))
 478                 goto out;
 479
 480         if (dhwe->selector && !(hwe->selector = set_param_str(dhwe->selector)))
 481                 goto out;
 482
 483         if (dhwe->checker_name && !(hwe->checker_name = set_param_str(dhwe->checker_name)))
 484                 goto out;
 485
 486         if (dhwe->prio_name && !(hwe->prio_name = set_param_str(dhwe->prio_name)))
 487                 goto out;
 488
 489         if (dhwe->prio_args && !(hwe->prio_args = set_param_str(dhwe->prio_args)))
 490                 goto out;
 491
 492         if (dhwe->alias_prefix && !(hwe->alias_prefix = set_param_str(dhwe->alias_prefix)))
 493                 goto out;
 494
 495         hwe->pgpolicy = dhwe->pgpolicy;
 496         hwe->pgfailback = dhwe->pgfailback;
 497         hwe->rr_weight = dhwe->rr_weight;
 498         hwe->no_path_retry = dhwe->no_path_retry;
 499         hwe->minio = dhwe->minio;
 500         hwe->minio_rq = dhwe->minio_rq;
 501         hwe->flush_on_last_del = dhwe->flush_on_last_del;
 502         hwe->fast_io_fail = dhwe->fast_io_fail;
 503         hwe->dev_loss = dhwe->dev_loss;
 504         hwe->user_friendly_names = dhwe->user_friendly_names;
 505         hwe->retain_hwhandler = dhwe->retain_hwhandler;
 506         hwe->detect_prio = dhwe->detect_prio;
 507         hwe->detect_checker = dhwe->detect_checker;
 508         hwe->ghost_delay = dhwe->ghost_delay;
 509
 510         if (dhwe->bl_product && !(hwe->bl_product = set_param_str(dhwe->bl_product)))
 511                 goto out;
 512
 513         if (!vector_alloc_slot(hwtable))
 514                 goto out;
 515
 516         vector_set_slot(hwtable, hwe);
 517         return 0;
 518 out:
 519         free_hwe(hwe);
 520         return 1;
 521 }
 522
 523 static void
 524 factorize_hwtable (vector hw, int n, const char *table_desc)
 525 {
 526         struct hwentry *hwe1, *hwe2;
 527         int i, j;
 528
 529 restart:
 530         vector_foreach_slot(hw, hwe1, i) {
 531                 /* drop invalid device configs */
 532                 if (i >= n && (!hwe1->vendor || !hwe1->product)) {
 533                         condlog(0, "device config in %s missing vendor or product parameter",
 534                                 table_desc);
 535                         vector_del_slot(hw, i--);
 536                         free_hwe(hwe1);
 537                         continue;
 538                 }
 539                 j = n > i + 1 ? n : i + 1;
 540                 vector_foreach_slot_after(hw, hwe2, j) {
 541                         if (hwe_strmatch(hwe2, hwe1) == 0) {
 542                                 condlog(i >= n ? 1 : 3,
 543                                         "%s: duplicate device section for %s:%s:%s in %s",
 544                                         __func__, hwe1->vendor, hwe1->product,
 545                                         hwe1->revision, table_desc);
 546                                 vector_del_slot(hw, i);
 547                                 merge_hwe(hwe2, hwe1);
 548                                 free_hwe(hwe1);
 549                                 if (i < n)
 550                                         n -= 1;
 551                                 /*
 552                                  * Play safe here; we have modified
 553                                  * the original vector so the outer
 554                                  * vector_foreach_slot() might
 555                                  * become confused.
 556                                  */
 557                                 goto restart;
 558                         }
 559                 }
 560         }
 561         return;
 562 }
 563
 564 struct config *
 565 alloc_config (void)
 566 {
 567         return (struct config *)MALLOC(sizeof(struct config));
 568 }
 569
 570 void
 571 free_config (struct config * conf)
 572 {
 573         if (!conf)
 574                 return;
 575
 576         if (conf->multipath_dir)
 577                 FREE(conf->multipath_dir);
 578
 579         if (conf->selector)
 580                 FREE(conf->selector);
 581
 582         if (conf->uid_attribute)
 583                 FREE(conf->uid_attribute);
 584
 585         if (conf->uid_attrs)
 586                 FREE(conf->uid_attrs);
 587
 588         if (conf->getuid)
 589                 FREE(conf->getuid);
 590
 591         if (conf->features)
 592                 FREE(conf->features);
 593
 594         if (conf->hwhandler)
 595                 FREE(conf->hwhandler);
 596
 597         if (conf->bindings_file)
 598                 FREE(conf->bindings_file);
 599
 600         if (conf->wwids_file)
 601                 FREE(conf->wwids_file);
 602
 603         if (conf->prkeys_file)
 604                 FREE(conf->prkeys_file);
 605
 606         if (conf->prio_name)
 607                 FREE(conf->prio_name);
 608
 609         if (conf->alias_prefix)
 610                 FREE(conf->alias_prefix);
 611         if (conf->partition_delim)
 612                 FREE(conf->partition_delim);
 613
 614         if (conf->prio_args)
 615                 FREE(conf->prio_args);
 616
 617         if (conf->checker_name)
 618                 FREE(conf->checker_name);
 619
 620         if (conf->config_dir)
 621                 FREE(conf->config_dir);
 622
 623         free_blacklist(conf->blist_devnode);
 624         free_blacklist(conf->blist_wwid);
 625         free_blacklist(conf->blist_property);
 626         free_blacklist(conf->blist_protocol);
 627         free_blacklist_device(conf->blist_device);
 628
 629         free_blacklist(conf->elist_devnode);
 630         free_blacklist(conf->elist_wwid);
 631         free_blacklist(conf->elist_property);
 632         free_blacklist(conf->elist_protocol);
 633         free_blacklist_device(conf->elist_device);
 634
 635         free_mptable(conf->mptable);
 636         free_hwtable(conf->hwtable);
 637         free_hwe(conf->overrides);
 638         free_keywords(conf->keywords);
 639         FREE(conf);
 640 }
 641
 642 /* if multipath fails to process the config directory, it should continue,
 643  * with just a warning message */
 644 static void
 645 process_config_dir(struct config *conf, vector keywords, char *dir)
 646 {
 647         struct dirent **namelist;
 648         struct scandir_result sr;
 649         int i, n;
 650         char path[LINE_MAX];
 651         int old_hwtable_size;
 652
 653         if (dir[0] != '/') {
 654                 condlog(1, "config_dir '%s' must be a fully qualified path",
 655                         dir);
 656                 return;
 657         }
 658         n = scandir(dir, &namelist, NULL, alphasort);
 659         if (n < 0) {
 660                 if (errno == ENOENT)
 661                         condlog(3, "No configuration dir '%s'", dir);
 662                 else
 663                         condlog(0, "couldn't open configuration dir '%s': %s",
 664                                 dir, strerror(errno));
 665                 return;
 666         } else if (n == 0)
 667                 return;
 668         sr.di = namelist;
 669         sr.n = n;
 670         pthread_cleanup_push_cast(free_scandir_result, &sr);
 671         for (i = 0; i < n; i++) {
 672                 if (!strstr(namelist[i]->d_name, ".conf"))
 673                         continue;
 674                 old_hwtable_size = VECTOR_SIZE(conf->hwtable);
 675                 snprintf(path, LINE_MAX, "%s/%s", dir, namelist[i]->d_name);
 676                 path[LINE_MAX-1] = '\0';
 677                 process_file(conf, path);
 678                 factorize_hwtable(conf->hwtable, old_hwtable_size,
 679                                   namelist[i]->d_name);
 680         }
 681         pthread_cleanup_pop(1);
 682 }
 683
 684 struct config *
 685 load_config (char * file)
 686 {
 687         struct config *conf = alloc_config();
 688
 689         if (!conf)
 690                 return NULL;
 691
 692         /*
 693          * internal defaults
 694          */
 695         conf->verbosity = DEFAULT_VERBOSITY;
 696
 697         get_sys_max_fds(&conf->max_fds);
 698         conf->bindings_file = set_default(DEFAULT_BINDINGS_FILE);
 699         conf->wwids_file = set_default(DEFAULT_WWIDS_FILE);
 700         conf->prkeys_file = set_default(DEFAULT_PRKEYS_FILE);
 701         conf->multipath_dir = set_default(DEFAULT_MULTIPATHDIR);
 702         conf->attribute_flags = 0;
 703         conf->reassign_maps = DEFAULT_REASSIGN_MAPS;
 704         conf->checkint = DEFAULT_CHECKINT;
 705         conf->max_checkint = 0;
 706         conf->force_sync = DEFAULT_FORCE_SYNC;
 707         conf->partition_delim = (default_partition_delim != NULL ?
 708                                  strdup(default_partition_delim) : NULL);
 709         conf->processed_main_config = 0;
 710         conf->find_multipaths = DEFAULT_FIND_MULTIPATHS;
 711         conf->uxsock_timeout = DEFAULT_REPLY_TIMEOUT;
 712         conf->retrigger_tries = DEFAULT_RETRIGGER_TRIES;
 713         conf->retrigger_delay = DEFAULT_RETRIGGER_DELAY;
 714         conf->uev_wait_timeout = DEFAULT_UEV_WAIT_TIMEOUT;
 715         conf->disable_changed_wwids = DEFAULT_DISABLE_CHANGED_WWIDS;
 716         conf->remove_retries = 0;
 717         conf->ghost_delay = DEFAULT_GHOST_DELAY;
 718         conf->all_tg_pt = DEFAULT_ALL_TG_PT;
 719
 720         /*
 721          * preload default hwtable
 722          */
 723         conf->hwtable = vector_alloc();
 724         if (!conf->hwtable)
 725                         goto out;
 726         if (setup_default_hwtable(conf->hwtable))
 727                 goto out;
 728
 729 #ifdef CHECK_BUILTIN_HWTABLE
 730         factorize_hwtable(conf->hwtable, 0, "builtin");
 731 #endif
 732         /*
 733          * read the config file
 734          */
 735         conf->keywords = vector_alloc();
 736         init_keywords(conf->keywords);
 737         if (filepresent(file)) {
 738                 int builtin_hwtable_size;
 739
 740                 builtin_hwtable_size = VECTOR_SIZE(conf->hwtable);
 741                 if (process_file(conf, file)) {
 742                         condlog(0, "error parsing config file");
 743                         goto out;
 744                 }
 745                 factorize_hwtable(conf->hwtable, builtin_hwtable_size, file);
 746         }
 747
 748         conf->processed_main_config = 1;
 749         if (conf->config_dir == NULL)
 750                 conf->config_dir = set_default(DEFAULT_CONFIG_DIR);
 751         if (conf->config_dir && conf->config_dir[0] != '\0')
 752                 process_config_dir(conf, conf->keywords, conf->config_dir);
 753
 754         /*
 755          * fill the voids left in the config file
 756          */
 757         if (conf->max_checkint == 0)
 758                 conf->max_checkint = MAX_CHECKINT(conf->checkint);
 759         if (conf->blist_devnode == NULL) {
 760                 conf->blist_devnode = vector_alloc();
 761
 762                 if (!conf->blist_devnode)
 763                         goto out;
 764         }
 765         if (conf->blist_wwid == NULL) {
 766                 conf->blist_wwid = vector_alloc();
 767
 768                 if (!conf->blist_wwid)
 769                         goto out;
 770         }
 771         if (conf->blist_device == NULL) {
 772                 conf->blist_device = vector_alloc();
 773
 774                 if (!conf->blist_device)
 775                         goto out;
 776         }
 777         if (conf->blist_property == NULL) {
 778                 conf->blist_property = vector_alloc();
 779
 780                 if (!conf->blist_property)
 781                         goto out;
 782         }
 783         if (conf->blist_protocol == NULL) {
 784                 conf->blist_protocol = vector_alloc();
 785
 786                 if (!conf->blist_protocol)
 787                         goto out;
 788         }
 789
 790         if (conf->elist_devnode == NULL) {
 791                 conf->elist_devnode = vector_alloc();
 792
 793                 if (!conf->elist_devnode)
 794                         goto out;
 795         }
 796         if (conf->elist_wwid == NULL) {
 797                 conf->elist_wwid = vector_alloc();
 798
 799                 if (!conf->elist_wwid)
 800                         goto out;
 801         }
 802
 803         if (conf->elist_device == NULL) {
 804                 conf->elist_device = vector_alloc();
 805
 806                 if (!conf->elist_device)
 807                         goto out;
 808         }
 809
 810         if (conf->elist_property == NULL) {
 811                 conf->elist_property = vector_alloc();
 812
 813                 if (!conf->elist_property)
 814                         goto out;
 815         }
 816         if (conf->elist_protocol == NULL) {
 817                 conf->elist_protocol = vector_alloc();
 818
 819                 if (!conf->elist_protocol)
 820                         goto out;
 821         }
 822
 823         if (setup_default_blist(conf))
 824                 goto out;
 825
 826         if (conf->mptable == NULL) {
 827                 conf->mptable = vector_alloc();
 828                 if (!conf->mptable)
 829                         goto out;
 830         }
 831
 832         merge_mptable(conf->mptable);
 833         merge_blacklist(conf->blist_devnode);
 834         merge_blacklist(conf->blist_property);
 835         merge_blacklist(conf->blist_wwid);
 836         merge_blacklist_device(conf->blist_device);
 837         merge_blacklist(conf->elist_devnode);
 838         merge_blacklist(conf->elist_property);
 839         merge_blacklist(conf->elist_wwid);
 840         merge_blacklist_device(conf->elist_device);
 841
 842         if (conf->bindings_file == NULL)
 843                 conf->bindings_file = set_default(DEFAULT_BINDINGS_FILE);
 844
 845         if (!conf->multipath_dir || !conf->bindings_file ||
 846             !conf->wwids_file || !conf->prkeys_file)
 847                 goto out;
 848
 849         return conf;
 850 out:
 851         free_config(conf);
 852         return NULL;
 853 }