src/rrd_create.c

   1 /*****************************************************************************
   2  * RRDtool 1.3rc9  Copyright by Tobi Oetiker, 1997-2008
   3  *****************************************************************************
   4  * rrd_create.c  creates new rrds
   5  *****************************************************************************/
   6
   7 #include <stdlib.h>
   8 #include <time.h>
   9 #include <locale.h>
  10
  11 #include "rrd_tool.h"
  12 #include "rrd_rpncalc.h"
  13 #include "rrd_hw.h"
  14
  15 #include "rrd_is_thread_safe.h"
  16
  17 unsigned long FnvHash(
  18     const char *str);
  19 int       create_hw_contingent_rras(
  20     rrd_t *rrd,
  21     unsigned short period,
  22     unsigned long hashed_name);
  23 void      parseGENERIC_DS(
  24     const char *def,
  25     rrd_t *rrd,
  26     int ds_idx);
  27 long int  rra_random_row(
  28     rra_def_t *);
  29
  30 int rrd_create(
  31     int argc,
  32     char **argv)
  33 {
  34     struct option long_options[] = {
  35         {"start", required_argument, 0, 'b'},
  36         {"step", required_argument, 0, 's'},
  37         {0, 0, 0, 0}
  38     };
  39     int       option_index = 0;
  40     int       opt;
  41     time_t    last_up = time(NULL) - 10;
  42     unsigned long pdp_step = 300;
  43     rrd_time_value_t last_up_tv;
  44     char     *parsetime_error = NULL;
  45     long      long_tmp;
  46     int       rc;
  47
  48     optind = 0;
  49     opterr = 0;         /* initialize getopt */
  50
  51     while (1) {
  52         opt = getopt_long(argc, argv, "b:s:", long_options, &option_index);
  53
  54         if (opt == EOF)
  55             break;
  56
  57         switch (opt) {
  58         case 'b':
  59             if ((parsetime_error = rrd_parsetime(optarg, &last_up_tv))) {
  60                 rrd_set_error("start time: %s", parsetime_error);
  61                 return (-1);
  62             }
  63             if (last_up_tv.type == RELATIVE_TO_END_TIME ||
  64                 last_up_tv.type == RELATIVE_TO_START_TIME) {
  65                 rrd_set_error("specifying time relative to the 'start' "
  66                               "or 'end' makes no sense here");
  67                 return (-1);
  68             }
  69
  70             last_up = mktime(&last_up_tv.tm) +last_up_tv.offset;
  71
  72             if (last_up < 3600 * 24 * 365 * 10) {
  73                 rrd_set_error
  74                     ("the first entry to the RRD should be after 1980");
  75                 return (-1);
  76             }
  77             break;
  78
  79         case 's':
  80             long_tmp = atol(optarg);
  81             if (long_tmp < 1) {
  82                 rrd_set_error("step size should be no less than one second");
  83                 return (-1);
  84             }
  85             pdp_step = long_tmp;
  86             break;
  87
  88         case '?':
  89             if (optopt != 0)
  90                 rrd_set_error("unknown option '%c'", optopt);
  91             else
  92                 rrd_set_error("unknown option '%s'", argv[optind - 1]);
  93             return (-1);
  94         }
  95     }
  96     if (optind == argc) {
  97         rrd_set_error("need name of an rrd file to create");
  98         return -1;
  99     }
 100     rc = rrd_create_r(argv[optind],
 101                       pdp_step, last_up,
 102                       argc - optind - 1, (const char **) (argv + optind + 1));
 103
 104     return rc;
 105 }
 106
 107 /* #define DEBUG */
 108 int rrd_create_r(
 109     const char *filename,
 110     unsigned long pdp_step,
 111     time_t last_up,
 112     int argc,
 113     const char **argv)
 114 {
 115     rrd_t     rrd;
 116     long      i;
 117     int       offset;
 118     char     *token;
 119     char      dummychar1[2], dummychar2[2];
 120     unsigned short token_idx, error_flag, period = 0;
 121     unsigned long hashed_name;
 122
 123     /* init rrd clean */
 124     rrd_init(&rrd);
 125     /* static header */
 126     if ((rrd.stat_head = calloc(1, sizeof(stat_head_t))) == NULL) {
 127         rrd_set_error("allocating rrd.stat_head");
 128         free(rrd.stat_head);
 129         return (-1);
 130     }
 131
 132     /* live header */
 133     if ((rrd.live_head = calloc(1, sizeof(live_head_t))) == NULL) {
 134         rrd_set_error("allocating rrd.live_head");
 135         free(rrd.stat_head);
 136         free(rrd.live_head);
 137         return (-1);
 138     }
 139
 140     /* set some defaults */
 141     strcpy(rrd.stat_head->cookie, RRD_COOKIE);
 142     strcpy(rrd.stat_head->version, RRD_VERSION3);   /* by default we are still version 3 */
 143     rrd.stat_head->float_cookie = FLOAT_COOKIE;
 144     rrd.stat_head->ds_cnt = 0;  /* this will be adjusted later */
 145     rrd.stat_head->rra_cnt = 0; /* ditto */
 146     rrd.stat_head->pdp_step = pdp_step; /* 5 minute default */
 147
 148     /* a default value */
 149     rrd.ds_def = NULL;
 150     rrd.rra_def = NULL;
 151
 152     rrd.live_head->last_up = last_up;
 153
 154     /* optind points to the first non-option command line arg,
 155      * in this case, the file name. */
 156     /* Compute the FNV hash value (used by SEASONAL and DEVSEASONAL
 157      * arrays. */
 158     hashed_name = FnvHash(filename);
 159     for (i = 0; i < argc; i++) {
 160         unsigned int ii;
 161
 162         if (strncmp(argv[i], "DS:", 3) == 0) {
 163             size_t    old_size = sizeof(ds_def_t) * (rrd.stat_head->ds_cnt);
 164
 165             if ((rrd.ds_def = rrd_realloc(rrd.ds_def,
 166                                           old_size + sizeof(ds_def_t))) ==
 167                 NULL) {
 168                 rrd_set_error("allocating rrd.ds_def");
 169                 free(rrd.stat_head);
 170                 free(rrd.live_head);
 171                 return (-1);
 172             }
 173             memset(&rrd.ds_def[rrd.stat_head->ds_cnt], 0, sizeof(ds_def_t));
 174             /* extract the name and type */
 175             switch (sscanf(&argv[i][3],
 176                            DS_NAM_FMT "%1[:]" DST_FMT "%1[:]%n",
 177                            rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
 178                            dummychar1,
 179                            rrd.ds_def[rrd.stat_head->ds_cnt].dst,
 180                            dummychar2, &offset)) {
 181             case 0:
 182             case 1:
 183                 rrd_set_error("Invalid DS name");
 184                 break;
 185             case 2:
 186             case 3:
 187                 rrd_set_error("Invalid DS type");
 188                 break;
 189             case 4:    /* (%n may or may not be counted) */
 190             case 5:    /* check for duplicate datasource names */
 191                 for (ii = 0; ii < rrd.stat_head->ds_cnt; ii++)
 192                     if (strcmp(rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
 193                                rrd.ds_def[ii].ds_nam) == 0)
 194                         rrd_set_error("Duplicate DS name: %s",
 195                                       rrd.ds_def[ii].ds_nam);
 196                 /* DS_type may be valid or not. Checked later */
 197                 break;
 198             default:
 199                 rrd_set_error("invalid DS format");
 200             }
 201             if (rrd_test_error()) {
 202                 free(rrd.stat_head);
 203                 free(rrd.live_head);
 204                 return -1;
 205             }
 206
 207             /* parse the remainder of the arguments */
 208             switch (dst_conv(rrd.ds_def[rrd.stat_head->ds_cnt].dst)) {
 209             case DST_COUNTER:
 210             case DST_ABSOLUTE:
 211             case DST_GAUGE:
 212             case DST_DERIVE:
 213                 parseGENERIC_DS(&argv[i][offset + 3], &rrd,
 214                                 rrd.stat_head->ds_cnt);
 215                 break;
 216             case DST_CDEF:
 217                 parseCDEF_DS(&argv[i][offset + 3], &rrd,
 218                              rrd.stat_head->ds_cnt);
 219                 break;
 220             default:
 221                 rrd_set_error("invalid DS type specified");
 222                 break;
 223             }
 224
 225             if (rrd_test_error()) {
 226                 free(rrd.stat_head);
 227                 free(rrd.live_head);
 228                 return -1;
 229             }
 230             rrd.stat_head->ds_cnt++;
 231         } else if (strncmp(argv[i], "RRA:", 4) == 0) {
 232             char     *argvcopy;
 233             char     *tokptr;
 234             size_t    old_size = sizeof(rra_def_t) * (rrd.stat_head->rra_cnt);
 235             int       row_cnt;
 236
 237             if ((rrd.rra_def = rrd_realloc(rrd.rra_def,
 238                                            old_size + sizeof(rra_def_t))) ==
 239                 NULL) {
 240                 rrd_set_error("allocating rrd.rra_def");
 241                 free(rrd.stat_head);
 242                 free(rrd.live_head);
 243                 return (-1);
 244             }
 245             memset(&rrd.rra_def[rrd.stat_head->rra_cnt], 0,
 246                    sizeof(rra_def_t));
 247
 248             argvcopy = strdup(argv[i]);
 249             token = strtok_r(&argvcopy[4], ":", &tokptr);
 250             token_idx = error_flag = 0;
 251             while (token != NULL) {
 252                 switch (token_idx) {
 253                 case 0:
 254                     if (sscanf(token, CF_NAM_FMT,
 255                                rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) !=
 256                         1)
 257                         rrd_set_error("Failed to parse CF name");
 258                     switch (cf_conv
 259                             (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
 260                     case CF_MHWPREDICT:
 261                         strcpy(rrd.stat_head->version, RRD_VERSION);    /* MHWPREDICT causes Version 4 */
 262                     case CF_HWPREDICT:
 263                         /* initialize some parameters */
 264                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].
 265                             u_val = 0.1;
 266                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_beta].
 267                             u_val = 1.0 / 288;
 268                         rrd.rra_def[rrd.stat_head->rra_cnt].
 269                             par[RRA_dependent_rra_idx].u_cnt =
 270                             rrd.stat_head->rra_cnt;
 271                         break;
 272                     case CF_DEVSEASONAL:
 273                     case CF_SEASONAL:
 274                         /* initialize some parameters */
 275                         rrd.rra_def[rrd.stat_head->rra_cnt].
 276                             par[RRA_seasonal_gamma].u_val = 0.1;
 277                         rrd.rra_def[rrd.stat_head->rra_cnt].
 278                             par[RRA_seasonal_smoothing_window].u_val = 0.05;
 279                         /* fall through */
 280                     case CF_DEVPREDICT:
 281                         rrd.rra_def[rrd.stat_head->rra_cnt].
 282                             par[RRA_dependent_rra_idx].u_cnt = -1;
 283                         break;
 284                     case CF_FAILURES:
 285                         rrd.rra_def[rrd.stat_head->rra_cnt].
 286                             par[RRA_delta_pos].u_val = 2.0;
 287                         rrd.rra_def[rrd.stat_head->rra_cnt].
 288                             par[RRA_delta_neg].u_val = 2.0;
 289                         rrd.rra_def[rrd.stat_head->rra_cnt].
 290                             par[RRA_window_len].u_cnt = 3;
 291                         rrd.rra_def[rrd.stat_head->rra_cnt].
 292                             par[RRA_failure_threshold].u_cnt = 2;
 293                         rrd.rra_def[rrd.stat_head->rra_cnt].
 294                             par[RRA_dependent_rra_idx].u_cnt = -1;
 295                         break;
 296                         /* invalid consolidation function */
 297                     case -1:
 298                         rrd_set_error
 299                             ("Unrecognized consolidation function %s",
 300                              rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam);
 301                     default:
 302                         break;
 303                     }
 304                     /* default: 1 pdp per cdp */
 305                     rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt = 1;
 306                     break;
 307                 case 1:
 308                     switch (cf_conv
 309                             (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
 310                     case CF_HWPREDICT:
 311                     case CF_MHWPREDICT:
 312                     case CF_DEVSEASONAL:
 313                     case CF_SEASONAL:
 314                     case CF_DEVPREDICT:
 315                     case CF_FAILURES:
 316                         row_cnt = atoi(token);
 317                         if (row_cnt <= 0)
 318                             rrd_set_error("Invalid row count: %i", row_cnt);
 319                         rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt = row_cnt;
 320                         break;
 321                     default:
 322                         rrd.rra_def[rrd.stat_head->rra_cnt].
 323                             par[RRA_cdp_xff_val].u_val = atof(token);
 324                         if (rrd.rra_def[rrd.stat_head->rra_cnt].
 325                             par[RRA_cdp_xff_val].u_val < 0.0
 326                             || rrd.rra_def[rrd.stat_head->rra_cnt].
 327                             par[RRA_cdp_xff_val].u_val >= 1.0)
 328                             rrd_set_error
 329                                 ("Invalid xff: must be between 0 and 1");
 330                         break;
 331                     }
 332                     break;
 333                 case 2:
 334                     switch (cf_conv
 335                             (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
 336                     case CF_HWPREDICT:
 337                     case CF_MHWPREDICT:
 338                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].
 339                             u_val = atof(token);
 340                         if (atof(token) <= 0.0 || atof(token) >= 1.0)
 341                             rrd_set_error
 342                                 ("Invalid alpha: must be between 0 and 1");
 343                         break;
 344                     case CF_DEVSEASONAL:
 345                     case CF_SEASONAL:
 346                         rrd.rra_def[rrd.stat_head->rra_cnt].
 347                             par[RRA_seasonal_gamma].u_val = atof(token);
 348                         if (atof(token) <= 0.0 || atof(token) >= 1.0)
 349                             rrd_set_error
 350                                 ("Invalid gamma: must be between 0 and 1");
 351                         rrd.rra_def[rrd.stat_head->rra_cnt].
 352                             par[RRA_seasonal_smooth_idx].u_cnt =
 353                             hashed_name %
 354                             rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt;
 355                         break;
 356                     case CF_FAILURES:
 357                         /* specifies the # of violations that constitutes the failure threshold */
 358                         rrd.rra_def[rrd.stat_head->rra_cnt].
 359                             par[RRA_failure_threshold].u_cnt = atoi(token);
 360                         if (atoi(token) < 1
 361                             || atoi(token) > MAX_FAILURES_WINDOW_LEN)
 362                             rrd_set_error
 363                                 ("Failure threshold is out of range %d, %d",
 364                                  1, MAX_FAILURES_WINDOW_LEN);
 365                         break;
 366                     case CF_DEVPREDICT:
 367                         /* specifies the index (1-based) of CF_DEVSEASONAL array
 368                          * associated with this CF_DEVPREDICT array. */
 369                         rrd.rra_def[rrd.stat_head->rra_cnt].
 370                             par[RRA_dependent_rra_idx].u_cnt =
 371                             atoi(token) - 1;
 372                         break;
 373                     default:
 374                         rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt =
 375                             atoi(token);
 376                         break;
 377                     }
 378                     break;
 379                 case 3:
 380                     switch (cf_conv
 381                             (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
 382                     case CF_HWPREDICT:
 383                     case CF_MHWPREDICT:
 384                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_beta].
 385                             u_val = atof(token);
 386                         if (atof(token) < 0.0 || atof(token) > 1.0)
 387                             rrd_set_error
 388                                 ("Invalid beta: must be between 0 and 1");
 389                         break;
 390                     case CF_DEVSEASONAL:
 391                     case CF_SEASONAL:
 392                         /* specifies the index (1-based) of CF_HWPREDICT array
 393                          * associated with this CF_DEVSEASONAL or CF_SEASONAL array.
 394                          * */
 395                         rrd.rra_def[rrd.stat_head->rra_cnt].
 396                             par[RRA_dependent_rra_idx].u_cnt =
 397                             atoi(token) - 1;
 398                         break;
 399                     case CF_FAILURES:
 400                         /* specifies the window length */
 401                         rrd.rra_def[rrd.stat_head->rra_cnt].
 402                             par[RRA_window_len].u_cnt = atoi(token);
 403                         if (atoi(token) < 1
 404                             || atoi(token) > MAX_FAILURES_WINDOW_LEN)
 405                             rrd_set_error
 406                                 ("Window length is out of range %d, %d", 1,
 407                                  MAX_FAILURES_WINDOW_LEN);
 408                         /* verify that window length exceeds the failure threshold */
 409                         if (rrd.rra_def[rrd.stat_head->rra_cnt].
 410                             par[RRA_window_len].u_cnt <
 411                             rrd.rra_def[rrd.stat_head->rra_cnt].
 412                             par[RRA_failure_threshold].u_cnt)
 413                             rrd_set_error
 414                                 ("Window length is shorter than the failure threshold");
 415                         break;
 416                     case CF_DEVPREDICT:
 417                         /* shouldn't be any more arguments */
 418                         rrd_set_error
 419                             ("Unexpected extra argument for consolidation function DEVPREDICT");
 420                         break;
 421                     default:
 422                         row_cnt = atoi(token);
 423                         if (row_cnt <= 0)
 424                             rrd_set_error("Invalid row count: %i", row_cnt);
 425                         rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt = row_cnt;
 426                         break;
 427                     }
 428                     break;
 429                 case 4:
 430                     switch (cf_conv
 431                             (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
 432                     case CF_FAILURES:
 433                         /* specifies the index (1-based) of CF_DEVSEASONAL array
 434                          * associated with this CF_DEVFAILURES array. */
 435                         rrd.rra_def[rrd.stat_head->rra_cnt].
 436                             par[RRA_dependent_rra_idx].u_cnt =
 437                             atoi(token) - 1;
 438                         break;
 439                     case CF_DEVSEASONAL:
 440                     case CF_SEASONAL:
 441                         /* optional smoothing window */
 442                         if (sscanf(token, "smoothing-window=%lf",
 443                                    &(rrd.rra_def[rrd.stat_head->rra_cnt].
 444                                      par[RRA_seasonal_smoothing_window].
 445                                      u_val))) {
 446                             strcpy(rrd.stat_head->version, RRD_VERSION);    /* smoothing-window causes Version 4 */
 447                             if (rrd.rra_def[rrd.stat_head->rra_cnt].
 448                                 par[RRA_seasonal_smoothing_window].u_val < 0.0
 449                                 || rrd.rra_def[rrd.stat_head->rra_cnt].
 450                                 par[RRA_seasonal_smoothing_window].u_val >
 451                                 1.0) {
 452                                 rrd_set_error
 453                                     ("Invalid smoothing-window %f: must be between 0 and 1",
 454                                      rrd.rra_def[rrd.stat_head->rra_cnt].
 455                                      par[RRA_seasonal_smoothing_window].
 456                                      u_val);
 457                             }
 458                         } else {
 459                             rrd_set_error("Invalid option %s", token);
 460                         }
 461                         break;
 462                     case CF_HWPREDICT:
 463                     case CF_MHWPREDICT:
 464                         /* length of the associated CF_SEASONAL and CF_DEVSEASONAL arrays. */
 465                         period = atoi(token);
 466                         if (period >
 467                             rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt)
 468                             rrd_set_error
 469                                 ("Length of seasonal cycle exceeds length of HW prediction array");
 470                         break;
 471                     default:
 472                         /* shouldn't be any more arguments */
 473                         rrd_set_error
 474                             ("Unexpected extra argument for consolidation function %s",
 475                              rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam);
 476                         break;
 477                     }
 478                     break;
 479                 case 5:
 480                     /* If we are here, this must be a CF_HWPREDICT RRA.
 481                      * Specifies the index (1-based) of CF_SEASONAL array
 482                      * associated with this CF_HWPREDICT array. If this argument
 483                      * is missing, then the CF_SEASONAL, CF_DEVSEASONAL, CF_DEVPREDICT,
 484                      * CF_FAILURES.
 485                      * arrays are created automatically. */
 486                     rrd.rra_def[rrd.stat_head->rra_cnt].
 487                         par[RRA_dependent_rra_idx].u_cnt = atoi(token) - 1;
 488                     break;
 489                 default:
 490                     /* should never get here */
 491                     rrd_set_error("Unknown error");
 492                     break;
 493                 }       /* end switch */
 494                 if (rrd_test_error()) {
 495                     /* all errors are unrecoverable */
 496                     free(argvcopy);
 497                     free(rrd.stat_head);
 498                     free(rrd.live_head);
 499                     return (-1);
 500                 }
 501                 token = strtok_r(NULL, ":", &tokptr);
 502                 token_idx++;
 503             }           /* end while */
 504             free(argvcopy);
 505 #ifdef DEBUG
 506             fprintf(stderr,
 507                     "Creating RRA CF: %s, dep idx %lu, current idx %lu\n",
 508                     rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam,
 509                     rrd.rra_def[rrd.stat_head->rra_cnt].
 510                     par[RRA_dependent_rra_idx].u_cnt, rrd.stat_head->rra_cnt);
 511 #endif
 512             /* should we create CF_SEASONAL, CF_DEVSEASONAL, and CF_DEVPREDICT? */
 513             if ((cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) ==
 514                  CF_HWPREDICT
 515                  || cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) ==
 516                  CF_MHWPREDICT)
 517                 && rrd.rra_def[rrd.stat_head->rra_cnt].
 518                 par[RRA_dependent_rra_idx].u_cnt == rrd.stat_head->rra_cnt) {
 519 #ifdef DEBUG
 520                 fprintf(stderr, "Creating HW contingent RRAs\n");
 521 #endif
 522                 if (create_hw_contingent_rras(&rrd, period, hashed_name) ==
 523                     -1) {
 524                     rrd_set_error("creating contingent RRA");
 525                     free(rrd.stat_head);
 526                     free(rrd.live_head);
 527                     return -1;
 528                 }
 529             }
 530             rrd.stat_head->rra_cnt++;
 531         } else {
 532             rrd_set_error("can't parse argument '%s'", argv[i]);
 533             free(rrd.stat_head);
 534             free(rrd.live_head);
 535             return -1;
 536         }
 537     }
 538
 539
 540     if (rrd.stat_head->rra_cnt < 1) {
 541         rrd_set_error("you must define at least one Round Robin Archive");
 542         free(rrd.stat_head);
 543         free(rrd.live_head);
 544         return (-1);
 545     }
 546
 547     if (rrd.stat_head->ds_cnt < 1) {
 548         rrd_set_error("you must define at least one Data Source");
 549         free(rrd.stat_head);
 550         free(rrd.live_head);
 551         return (-1);
 552     }
 553     return rrd_create_fn(filename, &rrd);
 554 }
 555
 556 void parseGENERIC_DS(
 557     const char *def,
 558     rrd_t *rrd,
 559     int ds_idx)
 560 {
 561     char      minstr[DS_NAM_SIZE], maxstr[DS_NAM_SIZE];
 562     char     *old_locale;
 563
 564     /*
 565        int temp;
 566
 567        temp = sscanf(def,"%lu:%18[^:]:%18[^:]",
 568        &(rrd -> ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
 569        minstr,maxstr);
 570      */
 571     old_locale = setlocale(LC_NUMERIC, "C");
 572     if (sscanf(def, "%lu:%18[^:]:%18[^:]",
 573                &(rrd->ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
 574                minstr, maxstr) == 3) {
 575         if (minstr[0] == 'U' && minstr[1] == 0)
 576             rrd->ds_def[ds_idx].par[DS_min_val].u_val = DNAN;
 577         else
 578             rrd->ds_def[ds_idx].par[DS_min_val].u_val = atof(minstr);
 579
 580         if (maxstr[0] == 'U' && maxstr[1] == 0)
 581             rrd->ds_def[ds_idx].par[DS_max_val].u_val = DNAN;
 582         else
 583             rrd->ds_def[ds_idx].par[DS_max_val].u_val = atof(maxstr);
 584
 585         if (!isnan(rrd->ds_def[ds_idx].par[DS_min_val].u_val) &&
 586             !isnan(rrd->ds_def[ds_idx].par[DS_max_val].u_val) &&
 587             rrd->ds_def[ds_idx].par[DS_min_val].u_val
 588             >= rrd->ds_def[ds_idx].par[DS_max_val].u_val) {
 589             rrd_set_error("min must be less than max in DS definition");
 590             setlocale(LC_NUMERIC, old_locale);
 591             return;
 592         }
 593     } else {
 594         rrd_set_error("failed to parse data source %s", def);
 595     }
 596     setlocale(LC_NUMERIC, old_locale);
 597 }
 598
 599 /* Create the CF_DEVPREDICT, CF_DEVSEASONAL, CF_SEASONAL, and CF_FAILURES RRAs
 600  * associated with a CF_HWPREDICT RRA. */
 601 int create_hw_contingent_rras(
 602     rrd_t *rrd,
 603     unsigned short period,
 604     unsigned long hashed_name)
 605 {
 606     size_t    old_size;
 607     rra_def_t *current_rra;
 608
 609     /* save index to CF_HWPREDICT */
 610     unsigned long hw_index = rrd->stat_head->rra_cnt;
 611
 612     /* advance the pointer */
 613     (rrd->stat_head->rra_cnt)++;
 614     /* allocate the memory for the 4 contingent RRAs */
 615     old_size = sizeof(rra_def_t) * (rrd->stat_head->rra_cnt);
 616     if ((rrd->rra_def = rrd_realloc(rrd->rra_def,
 617                                     old_size + 4 * sizeof(rra_def_t))) ==
 618         NULL) {
 619         rrd_set_error("allocating rrd.rra_def");
 620         return (-1);
 621     }
 622     /* clear memory */
 623     memset(&(rrd->rra_def[rrd->stat_head->rra_cnt]), 0,
 624            4 * sizeof(rra_def_t));
 625
 626     /* create the CF_SEASONAL RRA */
 627     current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
 628     strcpy(current_rra->cf_nam, "SEASONAL");
 629     current_rra->row_cnt = period;
 630     current_rra->par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
 631     current_rra->pdp_cnt = 1;
 632     current_rra->par[RRA_seasonal_gamma].u_val =
 633         rrd->rra_def[hw_index].par[RRA_hw_alpha].u_val;
 634     current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index;
 635     rrd->rra_def[hw_index].par[RRA_dependent_rra_idx].u_cnt =
 636         rrd->stat_head->rra_cnt;
 637
 638     /* create the CF_DEVSEASONAL RRA */
 639     (rrd->stat_head->rra_cnt)++;
 640     current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
 641     strcpy(current_rra->cf_nam, "DEVSEASONAL");
 642     current_rra->row_cnt = period;
 643     current_rra->par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
 644     current_rra->pdp_cnt = 1;
 645     current_rra->par[RRA_seasonal_gamma].u_val =
 646         rrd->rra_def[hw_index].par[RRA_hw_alpha].u_val;
 647     current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index;
 648
 649     /* create the CF_DEVPREDICT RRA */
 650     (rrd->stat_head->rra_cnt)++;
 651     current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
 652     strcpy(current_rra->cf_nam, "DEVPREDICT");
 653     current_rra->row_cnt = (rrd->rra_def[hw_index]).row_cnt;
 654     current_rra->pdp_cnt = 1;
 655     current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index + 2;   /* DEVSEASONAL */
 656
 657     /* create the CF_FAILURES RRA */
 658     (rrd->stat_head->rra_cnt)++;
 659     current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
 660     strcpy(current_rra->cf_nam, "FAILURES");
 661     current_rra->row_cnt = period;
 662     current_rra->pdp_cnt = 1;
 663     current_rra->par[RRA_delta_pos].u_val = 2.0;
 664     current_rra->par[RRA_delta_neg].u_val = 2.0;
 665     current_rra->par[RRA_failure_threshold].u_cnt = 7;
 666     current_rra->par[RRA_window_len].u_cnt = 9;
 667     current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index + 2;   /* DEVSEASONAL */
 668     return 0;
 669 }
 670
 671 /* create and empty rrd file according to the specs given */
 672
 673 int rrd_create_fn(
 674     const char *file_name,
 675     rrd_t *rrd)
 676 {
 677     unsigned long i, ii;
 678     int       rrd_file;
 679     rrd_value_t *unknown;
 680     int       unkn_cnt;
 681     rrd_file_t *rrd_file_dn;
 682     rrd_t     rrd_dn;
 683     unsigned flags = O_WRONLY | O_CREAT | O_TRUNC;
 684 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
 685     flags |= O_BINARY;
 686 #endif
 687
 688     if ((rrd_file = open(file_name, flags, 0666)) < 0) {
 689         rrd_set_error("creating '%s': %s", file_name, rrd_strerror(errno));
 690         free(rrd->stat_head);
 691         free(rrd->live_head);
 692         return (-1);
 693     }
 694
 695     write(rrd_file, rrd->stat_head, sizeof(stat_head_t));
 696
 697     write(rrd_file, rrd->ds_def, sizeof(ds_def_t) * rrd->stat_head->ds_cnt);
 698
 699     write(rrd_file, rrd->rra_def,
 700           sizeof(rra_def_t) * rrd->stat_head->rra_cnt);
 701
 702     write(rrd_file, rrd->live_head, sizeof(live_head_t));
 703
 704     if ((rrd->pdp_prep = calloc(1, sizeof(pdp_prep_t))) == NULL) {
 705         rrd_set_error("allocating pdp_prep");
 706         free(rrd->stat_head);
 707         free(rrd->live_head);
 708         close(rrd_file);
 709         return (-1);
 710     }
 711
 712     strcpy(rrd->pdp_prep->last_ds, "U");
 713
 714     rrd->pdp_prep->scratch[PDP_val].u_val = 0.0;
 715     rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt =
 716         rrd->live_head->last_up % rrd->stat_head->pdp_step;
 717
 718     for (i = 0; i < rrd->stat_head->ds_cnt; i++)
 719         write(rrd_file, rrd->pdp_prep, sizeof(pdp_prep_t));
 720
 721     if ((rrd->cdp_prep = calloc(1, sizeof(cdp_prep_t))) == NULL) {
 722         rrd_set_error("allocating cdp_prep");
 723         free(rrd->stat_head);
 724         free(rrd->live_head);
 725         close(rrd_file);
 726         return (-1);
 727     }
 728
 729
 730     for (i = 0; i < rrd->stat_head->rra_cnt; i++) {
 731         switch (cf_conv(rrd->rra_def[i].cf_nam)) {
 732         case CF_HWPREDICT:
 733         case CF_MHWPREDICT:
 734             init_hwpredict_cdp(rrd->cdp_prep);
 735             break;
 736         case CF_SEASONAL:
 737         case CF_DEVSEASONAL:
 738             init_seasonal_cdp(rrd->cdp_prep);
 739             break;
 740         case CF_FAILURES:
 741             /* initialize violation history to 0 */
 742             for (ii = 0; ii < MAX_CDP_PAR_EN; ii++) {
 743                 /* We can zero everything out, by setting u_val to the
 744                  * NULL address. Each array entry in scratch is 8 bytes
 745                  * (a double), but u_cnt only accessed 4 bytes (long) */
 746                 rrd->cdp_prep->scratch[ii].u_val = 0.0;
 747             }
 748             break;
 749         default:
 750             /* can not be zero because we don't know anything ... */
 751             rrd->cdp_prep->scratch[CDP_val].u_val = DNAN;
 752             /* startup missing pdp count */
 753             rrd->cdp_prep->scratch[CDP_unkn_pdp_cnt].u_cnt =
 754                 ((rrd->live_head->last_up -
 755                   rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt)
 756                  % (rrd->stat_head->pdp_step
 757                     * rrd->rra_def[i].pdp_cnt)) / rrd->stat_head->pdp_step;
 758             break;
 759         }
 760
 761         for (ii = 0; ii < rrd->stat_head->ds_cnt; ii++) {
 762             write(rrd_file, rrd->cdp_prep, sizeof(cdp_prep_t));
 763         }
 764     }
 765
 766     /* now, we must make sure that the rest of the rrd
 767        struct is properly initialized */
 768
 769     if ((rrd->rra_ptr = calloc(1, sizeof(rra_ptr_t))) == NULL) {
 770         rrd_set_error("allocating rra_ptr");
 771         free(rrd->stat_head);
 772         free(rrd->live_head);
 773         close(rrd_file);
 774         return (-1);
 775     }
 776
 777     /* changed this initialization to be consistent with
 778      * rrd_restore. With the old value (0), the first update
 779      * would occur for cur_row = 1 because rrd_update increments
 780      * the pointer a priori. */
 781     for (i = 0; i < rrd->stat_head->rra_cnt; i++) {
 782         rrd->rra_ptr->cur_row = rra_random_row(&rrd->rra_def[i]);
 783         write(rrd_file, rrd->rra_ptr, sizeof(rra_ptr_t));
 784     }
 785
 786     /* write the empty data area */
 787     if ((unknown = (rrd_value_t *) malloc(512 * sizeof(rrd_value_t))) == NULL) {
 788         rrd_set_error("allocating unknown");
 789         free(rrd->stat_head);
 790         free(rrd->live_head);
 791         close(rrd_file);
 792         return (-1);
 793     }
 794     for (i = 0; i < 512; ++i)
 795         unknown[i] = DNAN;
 796
 797     unkn_cnt = 0;
 798     for (i = 0; i < rrd->stat_head->rra_cnt; i++)
 799         unkn_cnt += rrd->stat_head->ds_cnt * rrd->rra_def[i].row_cnt;
 800
 801     while (unkn_cnt > 0) {
 802         write(rrd_file, unknown, sizeof(rrd_value_t) * min(unkn_cnt, 512));
 803
 804         unkn_cnt -= 512;
 805     }
 806     free(unknown);
 807     fdatasync(rrd_file);
 808     free(rrd->stat_head);
 809     free(rrd->live_head);
 810     if (close(rrd_file) == -1) {
 811         rrd_set_error("creating rrd: %s", rrd_strerror(errno));
 812         return -1;
 813     }
 814     /* flush all we don't need out of the cache */
 815     rrd_file_dn = rrd_open(file_name, &rrd_dn, RRD_READONLY);
 816     rrd_dontneed(rrd_file_dn, &rrd_dn);
 817     rrd_free(&rrd_dn);
 818     rrd_close(rrd_file_dn);
 819     return (0);
 820 }
 821
 822 static int rand_init = 0;
 823
 824 long int rra_random_row(
 825     rra_def_t *rra)
 826 {
 827     if (!rand_init) {
 828         srandom((unsigned int) time(NULL) + (unsigned int) getpid());
 829         rand_init++;
 830     }
 831
 832     return random() % rra->row_cnt;
 833 }