src/rrd_create.c

   1 /*****************************************************************************
   2  * RRDtool 1.2.5  Copyright by Tobi Oetiker, 1997-2005
   3  *****************************************************************************
   4  * rrd_create.c  creates new rrds
   5  *****************************************************************************/
   6
   7 #include "rrd_tool.h"
   8 #include "rrd_rpncalc.h"
   9 #include "rrd_hw.h"
  10
  11 #include "rrd_is_thread_safe.h"
  12
  13 unsigned long FnvHash(char *str);
  14 int create_hw_contingent_rras(rrd_t *rrd, unsigned short period, unsigned long hashed_name);
  15 void parseGENERIC_DS(char *def,rrd_t *rrd, int ds_idx);
  16
  17 int
  18 rrd_create(int argc, char **argv)
  19 {
  20     time_t            last_up = time(NULL)-10;
  21     unsigned long     pdp_step = 300;
  22     struct rrd_time_value last_up_tv;
  23     char *parsetime_error = NULL;
  24     long              long_tmp;
  25     int               rc;
  26     optind = 0; opterr = 0;  /* initialize getopt */
  27
  28     while (1){
  29         static struct option long_options[] =
  30         {
  31             {"start",      required_argument, 0, 'b'},
  32             {"step",        required_argument,0,'s'},
  33             {0,0,0,0}
  34         };
  35         int option_index = 0;
  36         int opt;
  37         opt = getopt_long(argc, argv, "b:s:",
  38                           long_options, &option_index);
  39
  40         if (opt == EOF)
  41             break;
  42
  43         switch(opt) {
  44         case 'b':
  45             if ((parsetime_error = parsetime(optarg, &last_up_tv))) {
  46                 rrd_set_error("start time: %s", parsetime_error );
  47                 return(-1);
  48             }
  49             if (last_up_tv.type == RELATIVE_TO_END_TIME ||
  50                 last_up_tv.type == RELATIVE_TO_START_TIME) {
  51                 rrd_set_error("specifying time relative to the 'start' "
  52                               "or 'end' makes no sense here");
  53                 return(-1);
  54             }
  55
  56             last_up = mktime(&last_up_tv.tm) + last_up_tv.offset;
  57
  58             if (last_up < 3600*24*365*10){
  59                 rrd_set_error("the first entry to the RRD should be after 1980");
  60                 return(-1);
  61             }
  62             break;
  63
  64         case 's':
  65             long_tmp = atol(optarg);
  66             if (long_tmp < 1){
  67                 rrd_set_error("step size should be no less than one second");
  68                 return(-1);
  69             }
  70             pdp_step = long_tmp;
  71             break;
  72
  73         case '?':
  74             if (optopt != 0)
  75                 rrd_set_error("unknown option '%c'", optopt);
  76             else
  77                 rrd_set_error("unknown option '%s'",argv[optind-1]);
  78             return(-1);
  79         }
  80     }
  81
  82     rc = rrd_create_r(argv[optind],
  83                       pdp_step, last_up,
  84                       argc - optind - 1, argv + optind + 1);
  85
  86     return rc;
  87 }
  88
  89 /* #define DEBUG */
  90 int
  91 rrd_create_r(char *filename,
  92              unsigned long pdp_step, time_t last_up,
  93              int argc, char **argv)
  94 {
  95     rrd_t             rrd;
  96     long              i;
  97     int               offset;
  98     char *token;
  99     unsigned short token_idx, error_flag, period=0;
 100     unsigned long hashed_name;
 101
 102     /* init rrd clean */
 103     rrd_init(&rrd);
 104     /* static header */
 105     if((rrd.stat_head = calloc(1,sizeof(stat_head_t)))==NULL){
 106         rrd_set_error("allocating rrd.stat_head");
 107         rrd_free(&rrd);
 108         return(-1);
 109     }
 110
 111     /* live header */
 112     if((rrd.live_head = calloc(1,sizeof(live_head_t)))==NULL){
 113         rrd_set_error("allocating rrd.live_head");
 114         rrd_free(&rrd);
 115         return(-1);
 116     }
 117
 118     /* set some defaults */
 119     strcpy(rrd.stat_head->cookie,RRD_COOKIE);
 120     strcpy(rrd.stat_head->version,RRD_VERSION);
 121     rrd.stat_head->float_cookie = FLOAT_COOKIE;
 122     rrd.stat_head->ds_cnt = 0; /* this will be adjusted later */
 123     rrd.stat_head->rra_cnt = 0; /* ditto */
 124     rrd.stat_head->pdp_step = pdp_step; /* 5 minute default */
 125
 126     /* a default value */
 127     rrd.ds_def = NULL;
 128     rrd.rra_def = NULL;
 129
 130     rrd.live_head->last_up = last_up;
 131
 132         /* optind points to the first non-option command line arg,
 133          * in this case, the file name. */
 134         /* Compute the FNV hash value (used by SEASONAL and DEVSEASONAL
 135          * arrays. */
 136     hashed_name = FnvHash(filename);
 137     for(i=0;i<argc;i++){
 138         unsigned int ii;
 139         if (strncmp(argv[i],"DS:",3)==0){
 140             size_t old_size = sizeof(ds_def_t)*(rrd.stat_head->ds_cnt);
 141             if((rrd.ds_def = rrd_realloc(rrd.ds_def,
 142                                          old_size+sizeof(ds_def_t)))==NULL){
 143                 rrd_set_error("allocating rrd.ds_def");
 144                 rrd_free(&rrd);
 145                 return(-1);
 146             }
 147             memset(&rrd.ds_def[rrd.stat_head->ds_cnt], 0, sizeof(ds_def_t));
 148             /* extract the name and type */
 149             if (sscanf(&argv[i][3],
 150                        DS_NAM_FMT ":" DST_FMT ":%n",
 151                        rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
 152                        rrd.ds_def[rrd.stat_head->ds_cnt].dst,&offset) == 2)
 153             {
 154                 /* check for duplicate datasource names */
 155                 for(ii=0;ii<rrd.stat_head->ds_cnt;ii++)
 156                     if(strcmp(rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
 157                               rrd.ds_def[ii].ds_nam) == 0){
 158                         rrd_set_error("Duplicate DS name: %s",rrd.ds_def[ii].ds_nam);
 159                     }
 160             } else {
 161                 rrd_set_error("invalid DS format");
 162             }
 163
 164             /* parse the remainder of the arguments */
 165             switch(dst_conv(rrd.ds_def[rrd.stat_head->ds_cnt].dst))
 166             {
 167             case DST_COUNTER:
 168             case DST_ABSOLUTE:
 169             case DST_GAUGE:
 170             case DST_DERIVE:
 171                 parseGENERIC_DS(&argv[i][offset+3],&rrd, rrd.stat_head->ds_cnt);
 172                 break;
 173             case DST_CDEF:
 174                 parseCDEF_DS(&argv[i][offset+3],&rrd, rrd.stat_head->ds_cnt);
 175                 break;
 176             default:
 177                 rrd_set_error("invalid DS type specified");
 178                 break;
 179             }
 180
 181             if (rrd_test_error()) {
 182                 rrd_free(&rrd);
 183                 return -1;
 184             }
 185             rrd.stat_head -> ds_cnt++;
 186         } else if (strncmp(argv[i],"RRA:",4)==0){
 187             char *argvcopy;
 188             char *tokptr;
 189             size_t old_size = sizeof(rra_def_t)*(rrd.stat_head->rra_cnt);
 190             if((rrd.rra_def = rrd_realloc(rrd.rra_def,
 191                                           old_size+sizeof(rra_def_t)))==NULL)
 192             {
 193                 rrd_set_error("allocating rrd.rra_def");
 194                 rrd_free(&rrd);
 195                 return(-1);
 196             }
 197             memset(&rrd.rra_def[rrd.stat_head->rra_cnt], 0, sizeof(rra_def_t));
 198
 199             argvcopy = strdup(argv[i]);
 200             token = strtok_r(&argvcopy[4],":", &tokptr);
 201             token_idx = error_flag = 0;
 202             while (token != NULL)
 203             {
 204                 switch(token_idx)
 205                 {
 206                 case 0:
 207                     if (sscanf(token,CF_NAM_FMT,
 208                                rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) != 1)
 209                         rrd_set_error("Failed to parse CF name");
 210                     switch(cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam))
 211                     {
 212                     case CF_HWPREDICT:
 213                         /* initialize some parameters */
 214                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].u_val = 0.1;
 215                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_beta].u_val = 1.0/288;
 216                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt =
 217                             rrd.stat_head -> rra_cnt;
 218                         break;
 219                     case CF_DEVSEASONAL:
 220                     case CF_SEASONAL:
 221                         /* initialize some parameters */
 222                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_seasonal_gamma].u_val = 0.1;
 223                         /* fall through */
 224                     case CF_DEVPREDICT:
 225                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt = -1;
 226                         break;
 227                     case CF_FAILURES:
 228                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_delta_pos].u_val = 2.0;
 229                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_delta_neg].u_val = 2.0;
 230                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_window_len].u_cnt = 3;
 231                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_failure_threshold].u_cnt = 2;
 232                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt = -1;
 233                         break;
 234                         /* invalid consolidation function */
 235                     case -1:
 236                         rrd_set_error("Unrecognized consolidation function %s",
 237                                       rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam);
 238                     default:
 239                         break;
 240                     }
 241                     /* default: 1 pdp per cdp */
 242                     rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt = 1;
 243                     break;
 244                 case 1:
 245                     switch(cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam))
 246                     {
 247                     case CF_HWPREDICT:
 248                     case CF_DEVSEASONAL:
 249                     case CF_SEASONAL:
 250                     case CF_DEVPREDICT:
 251                     case CF_FAILURES:
 252                         rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt = atoi(token);
 253                         break;
 254                     default:
 255                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_cdp_xff_val].u_val = atof(token);
 256                         if (rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_cdp_xff_val].u_val<0.0 ||
 257                             rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_cdp_xff_val].u_val>=1.0)
 258                             rrd_set_error("Invalid xff: must be between 0 and 1");
 259                         break;
 260                     }
 261                     break;
 262                 case 2:
 263                     switch(cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam))
 264                     {
 265                     case CF_HWPREDICT:
 266                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].u_val = atof(token);
 267                         if (atof(token) <= 0.0 || atof(token) >= 1.0)
 268                             rrd_set_error("Invalid alpha: must be between 0 and 1");
 269                         break;
 270                     case CF_DEVSEASONAL:
 271                     case CF_SEASONAL:
 272                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_seasonal_gamma].u_val =
 273                             atof(token);
 274                         if (atof(token) <= 0.0 || atof(token) >= 1.0)
 275                             rrd_set_error("Invalid gamma: must be between 0 and 1");
 276                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_seasonal_smooth_idx].u_cnt
 277                             = hashed_name % rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt;
 278                         break;
 279                     case CF_FAILURES:
 280                         /* specifies the # of violations that constitutes the failure threshold */
 281                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_failure_threshold].u_cnt =
 282                             atoi(token);
 283                         if (atoi(token) < 1 || atoi(token) > MAX_FAILURES_WINDOW_LEN)
 284                             rrd_set_error("Failure threshold is out of range %d, %d",1,
 285                                           MAX_FAILURES_WINDOW_LEN);
 286                         break;
 287                     case CF_DEVPREDICT:
 288                         /* specifies the index (1-based) of CF_DEVSEASONAL array
 289                          * associated with this CF_DEVPREDICT array. */
 290                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt =
 291                             atoi(token) - 1;
 292                         break;
 293                     default:
 294                         rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt = atoi(token);
 295                         break;
 296                     }
 297                     break;
 298                 case 3:
 299                     switch(cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam))
 300                     {
 301                     case CF_HWPREDICT:
 302                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_beta].u_val = atof(token);
 303                         if (atof(token) < 0.0 || atof(token) > 1.0)
 304                             rrd_set_error("Invalid beta: must be between 0 and 1");
 305                         break;
 306                     case CF_DEVSEASONAL:
 307                     case CF_SEASONAL:
 308                         /* specifies the index (1-based) of CF_HWPREDICT array
 309                          * associated with this CF_DEVSEASONAL or CF_SEASONAL array.
 310                          * */
 311                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt =
 312                             atoi(token) - 1;
 313                         break;
 314                     case CF_FAILURES:
 315                         /* specifies the window length */
 316                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_window_len].u_cnt =
 317                             atoi(token);
 318                         if (atoi(token) < 1 || atoi(token) > MAX_FAILURES_WINDOW_LEN)
 319                             rrd_set_error("Window length is out of range %d, %d",1,
 320                                           MAX_FAILURES_WINDOW_LEN);
 321                         /* verify that window length exceeds the failure threshold */
 322                         if (rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_window_len].u_cnt <
 323                             rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_failure_threshold].u_cnt)
 324                             rrd_set_error("Window length is shorter than the failure threshold");
 325                         break;
 326                     case CF_DEVPREDICT:
 327                         /* shouldn't be any more arguments */
 328                         rrd_set_error("Unexpected extra argument for consolidation function DEVPREDICT");
 329                         break;
 330                     default:
 331                         rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt = atoi(token);
 332                         break;
 333                     }
 334                     break;
 335                 case 4:
 336                     switch(cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam))
 337                     {
 338                     case CF_FAILURES:
 339                         /* specifies the index (1-based) of CF_DEVSEASONAL array
 340                          * associated with this CF_DEVFAILURES array. */
 341                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt =
 342                             atoi(token) - 1;
 343                         break;
 344                     case CF_HWPREDICT:
 345                         /* length of the associated CF_SEASONAL and CF_DEVSEASONAL arrays. */
 346                         period = atoi(token);
 347                         if (period > rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt)
 348                             rrd_set_error("Length of seasonal cycle exceeds length of HW prediction array");
 349                         break;
 350                     default:
 351                         /* shouldn't be any more arguments */
 352                         rrd_set_error("Unexpected extra argument for consolidation function %s",
 353                                       rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam);
 354                         break;
 355                     }
 356                     break;
 357                 case 5:
 358                     /* If we are here, this must be a CF_HWPREDICT RRA.
 359                      * Specifies the index (1-based) of CF_SEASONAL array
 360                      * associated with this CF_HWPREDICT array. If this argument
 361                      * is missing, then the CF_SEASONAL, CF_DEVSEASONAL, CF_DEVPREDICT,
 362                      * CF_FAILURES.
 363                      * arrays are created automatically. */
 364                     rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt =
 365                         atoi(token) - 1;
 366                     break;
 367                 default:
 368                     /* should never get here */
 369                     rrd_set_error("Unknown error");
 370                     break;
 371                 } /* end switch */
 372                 if (rrd_test_error())
 373                 {
 374                     /* all errors are unrecoverable */
 375                     free(argvcopy);
 376                     rrd_free(&rrd);
 377                     return (-1);
 378                 }
 379                 token = strtok_r(NULL,":", &tokptr);
 380                 token_idx++;
 381             } /* end while */
 382             free(argvcopy);
 383 #ifdef DEBUG
 384             fprintf(stderr,"Creating RRA CF: %s, dep idx %lu, current idx %lu\n",
 385                     rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam,
 386                     rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt,
 387                     rrd.stat_head -> rra_cnt);
 388 #endif
 389             /* should we create CF_SEASONAL, CF_DEVSEASONAL, and CF_DEVPREDICT? */
 390             if (cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) == CF_HWPREDICT
 391                 && rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt
 392                 == rrd.stat_head -> rra_cnt)
 393             {
 394 #ifdef DEBUG
 395                 fprintf(stderr,"Creating HW contingent RRAs\n");
 396 #endif
 397                 if (create_hw_contingent_rras(&rrd,period,hashed_name) == -1) {
 398                     rrd_set_error("creating contingent RRA");
 399                     rrd_free(&rrd);
 400                     return -1;
 401                 }
 402             }
 403             rrd.stat_head->rra_cnt++;
 404         } else {
 405             rrd_set_error("can't parse argument '%s'",argv[i]);
 406             rrd_free(&rrd);
 407             return -1;
 408         }
 409     }
 410
 411
 412     if (rrd.stat_head->rra_cnt < 1){
 413         rrd_set_error("you must define at least one Round Robin Archive");
 414         rrd_free(&rrd);
 415         return(-1);
 416     }
 417
 418     if (rrd.stat_head->ds_cnt < 1){
 419         rrd_set_error("you must define at least one Data Source");
 420         rrd_free(&rrd);
 421         return(-1);
 422     }
 423     return rrd_create_fn(filename, &rrd);
 424 }
 425
 426 void parseGENERIC_DS(char *def,rrd_t *rrd, int ds_idx)
 427 {
 428     char minstr[DS_NAM_SIZE], maxstr[DS_NAM_SIZE];
 429     /*
 430       int temp;
 431
 432       temp = sscanf(def,"%lu:%18[^:]:%18[^:]",
 433       &(rrd -> ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
 434       minstr,maxstr);
 435     */
 436     if (sscanf(def,"%lu:%18[^:]:%18[^:]",
 437                &(rrd -> ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
 438                minstr,maxstr) == 3)
 439     {
 440         if (minstr[0] == 'U' && minstr[1] == 0)
 441             rrd -> ds_def[ds_idx].par[DS_min_val].u_val = DNAN;
 442         else
 443             rrd -> ds_def[ds_idx].par[DS_min_val].u_val = atof(minstr);
 444
 445         if (maxstr[0] == 'U' && maxstr[1] == 0)
 446             rrd -> ds_def[ds_idx].par[DS_max_val].u_val = DNAN;
 447         else
 448             rrd -> ds_def[ds_idx].par[DS_max_val].u_val  = atof(maxstr);
 449
 450         if (! isnan(rrd -> ds_def[ds_idx].par[DS_min_val].u_val) &&
 451             ! isnan(rrd -> ds_def[ds_idx].par[DS_max_val].u_val) &&
 452             rrd -> ds_def[ds_idx].par[DS_min_val].u_val
 453             >= rrd -> ds_def[ds_idx].par[DS_max_val].u_val ) {
 454             rrd_set_error("min must be less than max in DS definition");
 455             return;
 456         }
 457     } else {
 458         rrd_set_error("failed to parse data source %s", def);
 459     }
 460 }
 461
 462 /* Create the CF_DEVPREDICT, CF_DEVSEASONAL, CF_SEASONAL, and CF_FAILURES RRAs
 463  * associated with a CF_HWPREDICT RRA. */
 464 int
 465 create_hw_contingent_rras(rrd_t *rrd, unsigned short period, unsigned long hashed_name)
 466 {
 467     size_t old_size;
 468     rra_def_t* current_rra;
 469
 470     /* save index to CF_HWPREDICT */
 471     unsigned long hw_index = rrd -> stat_head -> rra_cnt;
 472     /* advance the pointer */
 473     (rrd -> stat_head -> rra_cnt)++;
 474     /* allocate the memory for the 4 contingent RRAs */
 475     old_size = sizeof(rra_def_t)*(rrd -> stat_head->rra_cnt);
 476     if ((rrd -> rra_def = rrd_realloc(rrd -> rra_def,
 477                                       old_size+4*sizeof(rra_def_t)))==NULL)
 478     {
 479         rrd_set_error("allocating rrd.rra_def");
 480         return(-1);
 481     }
 482     /* clear memory */
 483     memset(&(rrd -> rra_def[rrd -> stat_head->rra_cnt]), 0, 4*sizeof(rra_def_t));
 484
 485     /* create the CF_SEASONAL RRA */
 486     current_rra = &(rrd -> rra_def[rrd -> stat_head -> rra_cnt]);
 487     strcpy(current_rra -> cf_nam,"SEASONAL");
 488     current_rra -> row_cnt = period;
 489     current_rra -> par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
 490     current_rra -> pdp_cnt = 1;
 491     current_rra -> par[RRA_seasonal_gamma].u_val =
 492         rrd -> rra_def[hw_index].par[RRA_hw_alpha].u_val;
 493     current_rra -> par[RRA_dependent_rra_idx].u_cnt = hw_index;
 494     rrd -> rra_def[hw_index].par[RRA_dependent_rra_idx].u_cnt = rrd -> stat_head -> rra_cnt;
 495
 496     /* create the CF_DEVSEASONAL RRA */
 497     (rrd -> stat_head -> rra_cnt)++;
 498     current_rra = &(rrd -> rra_def[rrd -> stat_head -> rra_cnt]);
 499     strcpy(current_rra -> cf_nam,"DEVSEASONAL");
 500     current_rra -> row_cnt = period;
 501     current_rra -> par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
 502     current_rra -> pdp_cnt = 1;
 503     current_rra -> par[RRA_seasonal_gamma].u_val =
 504         rrd -> rra_def[hw_index].par[RRA_hw_alpha].u_val;
 505     current_rra -> par[RRA_dependent_rra_idx].u_cnt = hw_index;
 506
 507     /* create the CF_DEVPREDICT RRA */
 508     (rrd -> stat_head -> rra_cnt)++;
 509     current_rra = &(rrd -> rra_def[rrd -> stat_head -> rra_cnt]);
 510     strcpy(current_rra -> cf_nam,"DEVPREDICT");
 511     current_rra -> row_cnt = (rrd -> rra_def[hw_index]).row_cnt;
 512     current_rra -> pdp_cnt = 1;
 513     current_rra -> par[RRA_dependent_rra_idx].u_cnt
 514         = hw_index + 2; /* DEVSEASONAL */
 515
 516     /* create the CF_FAILURES RRA */
 517     (rrd -> stat_head -> rra_cnt)++;
 518     current_rra = &(rrd -> rra_def[rrd -> stat_head -> rra_cnt]);
 519     strcpy(current_rra -> cf_nam,"FAILURES");
 520     current_rra -> row_cnt = period;
 521     current_rra -> pdp_cnt = 1;
 522     current_rra -> par[RRA_delta_pos].u_val = 2.0;
 523     current_rra -> par[RRA_delta_neg].u_val = 2.0;
 524     current_rra -> par[RRA_failure_threshold].u_cnt = 7;
 525     current_rra -> par[RRA_window_len].u_cnt = 9;
 526     current_rra -> par[RRA_dependent_rra_idx].u_cnt =
 527         hw_index + 2; /* DEVSEASONAL */
 528     return 0;
 529 }
 530
 531 /* create and empty rrd file according to the specs given */
 532
 533 int
 534 rrd_create_fn(char *file_name, rrd_t *rrd)
 535 {
 536     unsigned long    i,ii;
 537     FILE             *rrd_file;
 538     rrd_value_t      *unknown;
 539     int unkn_cnt;
 540
 541     if ((rrd_file = fopen(file_name,"wb")) == NULL ) {
 542         rrd_set_error("creating '%s': %s",file_name, rrd_strerror(errno));
 543         free(rrd->stat_head);
 544         free(rrd->ds_def);
 545         free(rrd->rra_def);
 546         return(-1);
 547     }
 548
 549     fwrite(rrd->stat_head,
 550            sizeof(stat_head_t), 1, rrd_file);
 551
 552     fwrite(rrd->ds_def,
 553            sizeof(ds_def_t), rrd->stat_head->ds_cnt, rrd_file);
 554
 555     fwrite(rrd->rra_def,
 556            sizeof(rra_def_t), rrd->stat_head->rra_cnt, rrd_file);
 557
 558     fwrite(rrd->live_head,
 559            sizeof(live_head_t),1, rrd_file);
 560
 561     if((rrd->pdp_prep = calloc(1,sizeof(pdp_prep_t))) == NULL){
 562         rrd_set_error("allocating pdp_prep");
 563         rrd_free(rrd);
 564         fclose(rrd_file);
 565         return(-1);
 566     }
 567
 568     strcpy(rrd->pdp_prep->last_ds,"UNKN");
 569
 570     rrd->pdp_prep->scratch[PDP_val].u_val = 0.0;
 571     rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt =
 572         rrd->live_head->last_up % rrd->stat_head->pdp_step;
 573
 574     for(i=0; i < rrd->stat_head->ds_cnt; i++)
 575         fwrite( rrd->pdp_prep,sizeof(pdp_prep_t),1,rrd_file);
 576
 577     if((rrd->cdp_prep = calloc(1,sizeof(cdp_prep_t))) == NULL){
 578         rrd_set_error("allocating cdp_prep");
 579         rrd_free(rrd);
 580         fclose(rrd_file);
 581         return(-1);
 582     }
 583
 584
 585     for(i=0; i < rrd->stat_head->rra_cnt; i++) {
 586        switch (cf_conv(rrd->rra_def[i].cf_nam))
 587            {
 588            case CF_HWPREDICT:
 589                init_hwpredict_cdp(rrd->cdp_prep);
 590                break;
 591            case CF_SEASONAL:
 592            case CF_DEVSEASONAL:
 593                init_seasonal_cdp(rrd->cdp_prep);
 594                break;
 595            case CF_FAILURES:
 596                /* initialize violation history to 0 */
 597                for (ii = 0; ii < MAX_CDP_PAR_EN; ii++)
 598                {
 599                                 /* We can zero everything out, by setting u_val to the
 600                                  * NULL address. Each array entry in scratch is 8 bytes
 601                                  * (a double), but u_cnt only accessed 4 bytes (long) */
 602                    rrd->cdp_prep->scratch[ii].u_val = 0.0;
 603                }
 604                break;
 605            default:
 606                /* can not be zero because we don't know anything ... */
 607                rrd->cdp_prep->scratch[CDP_val].u_val = DNAN;
 608                /* startup missing pdp count */
 609                rrd->cdp_prep->scratch[CDP_unkn_pdp_cnt].u_cnt =
 610                    ((rrd->live_head->last_up -
 611                  rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt)
 612                     % (rrd->stat_head->pdp_step
 613                        * rrd->rra_def[i].pdp_cnt)) / rrd->stat_head->pdp_step;
 614                break;
 615            }
 616
 617        for(ii=0; ii < rrd->stat_head->ds_cnt; ii++)
 618        {
 619            fwrite( rrd->cdp_prep,sizeof(cdp_prep_t),1,rrd_file);
 620        }
 621     }
 622
 623     /* now, we must make sure that the rest of the rrd
 624        struct is properly initialized */
 625
 626     if((rrd->rra_ptr = calloc(1,sizeof(rra_ptr_t))) == NULL) {
 627         rrd_set_error("allocating rra_ptr");
 628         rrd_free(rrd);
 629         fclose(rrd_file);
 630         return(-1);
 631     }
 632
 633     /* changed this initialization to be consistent with
 634      * rrd_restore. With the old value (0), the first update
 635      * would occur for cur_row = 1 because rrd_update increments
 636      * the pointer a priori. */
 637     for (i=0; i < rrd->stat_head->rra_cnt; i++)
 638     {
 639         rrd->rra_ptr->cur_row = rrd->rra_def[i].row_cnt - 1;
 640         fwrite( rrd->rra_ptr, sizeof(rra_ptr_t),1,rrd_file);
 641     }
 642
 643     /* write the empty data area */
 644     if ((unknown = (rrd_value_t *)malloc(512 * sizeof(rrd_value_t))) == NULL) {
 645         rrd_set_error("allocating unknown");
 646         rrd_free(rrd);
 647         fclose(rrd_file);
 648         return(-1);
 649     }
 650     for (i = 0; i < 512; ++i)
 651         unknown[i] = DNAN;
 652
 653     unkn_cnt = 0;
 654     for (i = 0; i < rrd->stat_head->rra_cnt; i++)
 655         unkn_cnt += rrd->stat_head->ds_cnt * rrd->rra_def[i].row_cnt;
 656
 657     while (unkn_cnt > 0) {
 658         fwrite(unknown, sizeof(rrd_value_t), min(unkn_cnt, 512), rrd_file);
 659         unkn_cnt -= 512;
 660      }
 661     free(unknown);
 662
 663     /* lets see if we had an error */
 664     if(ferror(rrd_file)){
 665         rrd_set_error("a file error occurred while creating '%s'",file_name);
 666         fclose(rrd_file);
 667         rrd_free(rrd);
 668         return(-1);
 669     }
 670
 671     fclose(rrd_file);
 672     rrd_free(rrd);
 673     return (0);
 674 }