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
   9 #include <checkers.h>
  10
  11 #include "memory.h"
  12 #include "util.h"
  13 #include "debug.h"
  14 #include "parser.h"
  15 #include "dict.h"
  16 #include "hwtable.h"
  17 #include "vector.h"
  18 #include "structs.h"
  19 #include "config.h"
  20 #include "blacklist.h"
  21 #include "defaults.h"
  22
  23 static struct hwentry *
  24 find_hwe_strmatch (vector hwtable, char * vendor, char * product, char * revision)
  25 {
  26         int i;
  27         struct hwentry *hwe, *ret = NULL;
  28
  29         vector_foreach_slot (hwtable, hwe, i) {
  30                 if (hwe->vendor && vendor && strcmp(hwe->vendor, vendor))
  31                         continue;
  32
  33                 if (hwe->product && product && strcmp(hwe->product, product))
  34                         continue;
  35
  36                 if (hwe->revision && revision && strcmp(hwe->revision, revision))
  37                         continue;
  38
  39                 ret = hwe;
  40                 break;
  41         }
  42         return ret;
  43 }
  44
  45 struct hwentry *
  46 find_hwe (vector hwtable, char * vendor, char * product, char * revision)
  47 {
  48         int i;
  49         struct hwentry *hwe, *ret = NULL;
  50         regex_t vre, pre, rre;
  51
  52         vector_foreach_slot (hwtable, hwe, i) {
  53                 if (hwe->vendor &&
  54                     regcomp(&vre, hwe->vendor, REG_EXTENDED|REG_NOSUB))
  55                         break;
  56                 if (hwe->product &&
  57                     regcomp(&pre, hwe->product, REG_EXTENDED|REG_NOSUB)) {
  58                         regfree(&vre);
  59                         break;
  60                 }
  61                 if (hwe->revision &&
  62                     regcomp(&rre, hwe->revision, REG_EXTENDED|REG_NOSUB)) {
  63                         regfree(&vre);
  64                         regfree(&pre);
  65                         break;
  66                 }
  67                 if ((!hwe->vendor || !regexec(&vre, vendor, 0, NULL, 0)) &&
  68                     (!hwe->product || !regexec(&pre, product, 0, NULL, 0)) &&
  69                     (!hwe->revision || !regexec(&rre, revision, 0, NULL, 0)))
  70                         ret = hwe;
  71
  72                 if (hwe->revision)
  73                         regfree(&rre);
  74                 if (hwe->product)
  75                         regfree(&pre);
  76                 if (hwe->vendor)
  77                         regfree(&vre);
  78
  79                 if (ret)
  80                         break;
  81         }
  82         return ret;
  83 }
  84
  85 extern struct mpentry *
  86 find_mpe (char * wwid)
  87 {
  88         int i;
  89         struct mpentry * mpe;
  90
  91         if (!wwid)
  92                 return NULL;
  93
  94         vector_foreach_slot (conf->mptable, mpe, i)
  95                 if (mpe->wwid && !strcmp(mpe->wwid, wwid))
  96                         return mpe;
  97
  98         return NULL;
  99 }
 100
 101 extern char *
 102 get_mpe_wwid (char * alias)
 103 {
 104         int i;
 105         struct mpentry * mpe;
 106
 107         if (!alias)
 108                 return NULL;
 109
 110         vector_foreach_slot (conf->mptable, mpe, i)
 111                 if (mpe->alias && strcmp(mpe->alias, alias) == 0)
 112                         return mpe->wwid;
 113
 114         return NULL;
 115 }
 116
 117 void
 118 free_hwe (struct hwentry * hwe)
 119 {
 120         if (!hwe)
 121                 return;
 122
 123         if (hwe->vendor)
 124                 FREE(hwe->vendor);
 125
 126         if (hwe->product)
 127                 FREE(hwe->product);
 128
 129         if (hwe->revision)
 130                 FREE(hwe->revision);
 131
 132         if (hwe->selector)
 133                 FREE(hwe->selector);
 134
 135         if (hwe->getuid)
 136                 FREE(hwe->getuid);
 137
 138         if (hwe->getprio)
 139                 FREE(hwe->getprio);
 140
 141         if (hwe->features)
 142                 FREE(hwe->features);
 143
 144         if (hwe->hwhandler)
 145                 FREE(hwe->hwhandler);
 146
 147         if (hwe->bl_product)
 148                 FREE(hwe->bl_product);
 149
 150         FREE(hwe);
 151 }
 152
 153 void
 154 free_hwtable (vector hwtable)
 155 {
 156         int i;
 157         struct hwentry * hwe;
 158
 159         if (!hwtable)
 160                 return;
 161
 162         vector_foreach_slot (hwtable, hwe, i)
 163                 free_hwe(hwe);
 164
 165         vector_free(hwtable);
 166 }
 167
 168 void
 169 free_mpe (struct mpentry * mpe)
 170 {
 171         if (!mpe)
 172                 return;
 173
 174         if (mpe->wwid)
 175                 FREE(mpe->wwid);
 176
 177         if (mpe->selector)
 178                 FREE(mpe->selector);
 179
 180         if (mpe->getuid)
 181                 FREE(mpe->getuid);
 182
 183         if (mpe->alias)
 184                 FREE(mpe->alias);
 185
 186         FREE(mpe);
 187 }
 188
 189 void
 190 free_mptable (vector mptable)
 191 {
 192         int i;
 193         struct mpentry * mpe;
 194
 195         if (!mptable)
 196                 return;
 197
 198         vector_foreach_slot (mptable, mpe, i)
 199                 free_mpe(mpe);
 200
 201         vector_free(mptable);
 202 }
 203
 204 struct mpentry *
 205 alloc_mpe (void)
 206 {
 207         struct mpentry * mpe = (struct mpentry *)
 208                                 MALLOC(sizeof(struct mpentry));
 209
 210         return mpe;
 211 }
 212
 213 static struct hwentry *
 214 alloc_hwe (void)
 215 {
 216         struct hwentry * hwe = (struct hwentry *)
 217                                 MALLOC(sizeof(struct hwentry));
 218
 219         return hwe;
 220 }
 221
 222 static char *
 223 set_param_str(char * str)
 224 {
 225         char * dst;
 226         int len;
 227
 228         if (!str)
 229                 return NULL;
 230
 231         len = strlen(str);
 232
 233         if (!len)
 234                 return NULL;
 235
 236         dst = (char *)MALLOC(len + 1);
 237
 238         if (!dst)
 239                 return NULL;
 240
 241         strcpy(dst, str);
 242         return dst;
 243 }
 244
 245 int
 246 store_hwe (vector hwtable, struct hwentry * dhwe)
 247 {
 248         struct hwentry * hwe;
 249
 250         if (find_hwe_strmatch(hwtable, dhwe->vendor, dhwe->product, dhwe->revision))
 251                 return 0;
 252
 253         if (!(hwe = alloc_hwe()))
 254                 return 1;
 255
 256         if (!dhwe->vendor || !(hwe->vendor = set_param_str(dhwe->vendor)))
 257                 goto out;
 258
 259         if (!dhwe->product || !(hwe->product = set_param_str(dhwe->product)))
 260                 goto out;
 261
 262         if (dhwe->revision && !(hwe->revision = set_param_str(dhwe->revision)))
 263                 goto out;
 264
 265         if (dhwe->getuid && !(hwe->getuid = set_param_str(dhwe->getuid)))
 266                 goto out;
 267
 268         if (dhwe->getprio && !(hwe->getprio = set_param_str(dhwe->getprio)))
 269                 goto out;
 270
 271         if (dhwe->features && !(hwe->features = set_param_str(dhwe->features)))
 272                 goto out;
 273
 274         if (dhwe->hwhandler && !(hwe->hwhandler = set_param_str(dhwe->hwhandler)))
 275                 goto out;
 276
 277         if (dhwe->selector && !(hwe->selector = set_param_str(dhwe->selector)))
 278                 goto out;
 279
 280         hwe->pgpolicy = dhwe->pgpolicy;
 281         hwe->pgfailback = dhwe->pgfailback;
 282         hwe->rr_weight = dhwe->rr_weight;
 283         hwe->no_path_retry = dhwe->no_path_retry;
 284         hwe->minio = dhwe->minio;
 285         hwe->checker = dhwe->checker;
 286
 287         if (dhwe->bl_product && !(hwe->bl_product = set_param_str(dhwe->bl_product)))
 288                 goto out;
 289
 290         if (!vector_alloc_slot(hwtable))
 291                 goto out;
 292
 293         vector_set_slot(hwtable, hwe);
 294         return 0;
 295 out:
 296         free_hwe(hwe);
 297         return 1;
 298 }
 299
 300 struct config *
 301 alloc_config (void)
 302 {
 303         return (struct config *)MALLOC(sizeof(struct config));
 304 }
 305
 306 void
 307 free_config (struct config * conf)
 308 {
 309         if (!conf)
 310                 return;
 311
 312         if (conf->dev)
 313                 FREE(conf->dev);
 314
 315         if (conf->udev_dir)
 316                 FREE(conf->udev_dir);
 317
 318         if (conf->selector)
 319                 FREE(conf->selector);
 320
 321         if (conf->getuid)
 322                 FREE(conf->getuid);
 323
 324         if (conf->getprio)
 325                 FREE(conf->getprio);
 326
 327         if (conf->features)
 328                 FREE(conf->features);
 329
 330         if (conf->hwhandler)
 331                 FREE(conf->hwhandler);
 332
 333         free_blacklist(conf->blist_devnode);
 334         free_blacklist(conf->blist_wwid);
 335         free_blacklist_device(conf->blist_device);
 336         free_mptable(conf->mptable);
 337         free_hwtable(conf->hwtable);
 338         free_keywords(conf->keywords);
 339         FREE(conf);
 340 }
 341
 342 int
 343 load_config (char * file)
 344 {
 345         if (!conf)
 346                 conf = alloc_config();
 347
 348         if (!conf)
 349                 return 1;
 350
 351         /*
 352          * internal defaults
 353          */
 354         if (!conf->verbosity)
 355                 conf->verbosity = 2;
 356
 357         conf->dev_type = DEV_NONE;
 358         conf->minio = 1000;
 359         conf->bindings_file = DEFAULT_BINDINGS_FILE;
 360
 361         /*
 362          * read the config file
 363          */
 364         if (filepresent(file)) {
 365                 set_current_keywords(&conf->keywords);
 366                 if (init_data(file, init_keywords)) {
 367                         condlog(0, "error parsing config file");
 368                         goto out;
 369                 }
 370         }
 371
 372         /*
 373          * fill the voids left in the config file
 374          */
 375         if (conf->hwtable == NULL) {
 376                 conf->hwtable = vector_alloc();
 377
 378                 if (!conf->hwtable)
 379                         goto out;
 380
 381         }
 382         if (setup_default_hwtable(conf->hwtable))
 383                 goto out;
 384
 385         if (conf->blist_devnode == NULL) {
 386                 conf->blist_devnode = vector_alloc();
 387
 388                 if (!conf->blist_devnode)
 389                         goto out;
 390         }
 391         if (conf->blist_wwid == NULL) {
 392                 conf->blist_wwid = vector_alloc();
 393
 394                 if (!conf->blist_wwid)
 395                         goto out;
 396         }
 397         if (conf->blist_device == NULL) {
 398                 conf->blist_device = vector_alloc();
 399
 400                 if (!conf->blist_device)
 401                         goto out;
 402         }
 403         if (setup_default_blist(conf))
 404                 goto out;
 405
 406         if (conf->mptable == NULL) {
 407                 conf->mptable = vector_alloc();
 408
 409                 if (!conf->mptable)
 410                         goto out;
 411         }
 412         if (conf->selector == NULL)
 413                 conf->selector = set_default(DEFAULT_SELECTOR);
 414
 415         if (conf->udev_dir == NULL)
 416                 conf->udev_dir = set_default(DEFAULT_UDEVDIR);
 417
 418         if (conf->getuid == NULL)
 419                 conf->getuid = set_default(DEFAULT_GETUID);
 420
 421         if (conf->features == NULL)
 422                 conf->features = set_default(DEFAULT_FEATURES);
 423
 424         if (conf->hwhandler == NULL)
 425                 conf->hwhandler = set_default(DEFAULT_HWHANDLER);
 426
 427         if (!conf->selector  || !conf->udev_dir         ||
 428             !conf->getuid    || !conf->features ||
 429             !conf->hwhandler)
 430                 goto out;
 431
 432         if (!conf->checker)
 433                 conf->checker = checker_lookup(DEFAULT_CHECKER);
 434
 435         return 0;
 436 out:
 437         free_config(conf);
 438         return 1;
 439 }
 440