src/rrd_create.c

   1 /*****************************************************************************
   2  * RRDtool 1.1.x  Copyright Tobias Oetiker, 1997 - 2002
   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 time_value last_up_tv;
  23     char *parsetime_error = NULL;
  24     long              long_tmp;
  25     int               rc;
  26
  27     while (1){
  28         static struct option long_options[] =
  29         {
  30             {"start",      required_argument, 0, 'b'},
  31             {"step",        required_argument,0,'s'},
  32             {0,0,0,0}
  33         };
  34         int option_index = 0;
  35         int opt;
  36         opt = getopt_long(argc, argv, "b:s:",
  37                           long_options, &option_index);
  38
  39         if (opt == EOF)
  40             break;
  41
  42         switch(opt) {
  43         case 'b':
  44             if ((parsetime_error = parsetime(optarg, &last_up_tv))) {
  45                 rrd_set_error("start time: %s", parsetime_error );
  46                 return(-1);
  47             }
  48             if (last_up_tv.type == RELATIVE_TO_END_TIME ||
  49                 last_up_tv.type == RELATIVE_TO_START_TIME) {
  50                 rrd_set_error("specifying time relative to the 'start' "
  51                               "or 'end' makes no sense here");
  52                 return(-1);
  53             }
  54
  55             last_up = mktime(&last_up_tv.tm) + last_up_tv.offset;
  56
  57             if (last_up < 3600*24*365*10){
  58                 rrd_set_error("the first entry to the RRD should be after 1980");
  59                 return(-1);
  60             }
  61             break;
  62
  63         case 's':
  64             long_tmp = atol(optarg);
  65             if (long_tmp < 1){
  66                 rrd_set_error("step size should be no less than one second");
  67                 return(-1);
  68             }
  69             pdp_step = long_tmp;
  70             break;
  71
  72         case '?':
  73             if (optopt != 0)
  74                 rrd_set_error("unknown option '%c'", optopt);
  75             else
  76                 rrd_set_error("unknown option '%s'",argv[optind-1]);
  77             return(-1);
  78         }
  79     }
  80
  81     rc = rrd_create_r(argv[optind],
  82                       pdp_step, last_up,
  83                       argc - optind - 1, argv + optind + 1);
  84
  85     return rc;
  86 }
  87
  88 /* #define DEBUG */
  89 int
  90 rrd_create_r(char *filename,
  91              unsigned long pdp_step, time_t last_up,
  92              int argc, char **argv)
  93 {
  94     rrd_t             rrd;
  95     long              i;
  96     int               offset;
  97     char *token;
  98     unsigned short token_idx, error_flag, period=0;
  99     unsigned long hashed_name;
 100
 101     /* init rrd clean */
 102     rrd_init(&rrd);
 103     /* static header */
 104     if((rrd.stat_head = calloc(1,sizeof(stat_head_t)))==NULL){
 105         rrd_set_error("allocating rrd.stat_head");
 106         return(-1);
 107     }
 108
 109     /* live header */
 110     if((rrd.live_head = calloc(1,sizeof(live_head_t)))==NULL){
 111         rrd_set_error("allocating rrd.live_head");
 112         return(-1);
 113     }
 114
 115     /* set some defaults */
 116     strcpy(rrd.stat_head->cookie,RRD_COOKIE);
 117         /* assume the will be version 1 compatible */
 118     strcpy(rrd.stat_head->version,"0001");
 119     rrd.stat_head->float_cookie = FLOAT_COOKIE;
 120     rrd.stat_head->ds_cnt = 0; /* this will be adjusted later */
 121     rrd.stat_head->rra_cnt = 0; /* ditto */
 122     rrd.stat_head->pdp_step = pdp_step; /* 5 minute default */
 123
 124     /* a default value */
 125     rrd.ds_def = NULL;
 126     rrd.rra_def = NULL;
 127
 128     rrd.live_head->last_up = last_up;
 129
 130         /* optind points to the first non-option command line arg,
 131          * in this case, the file name. */
 132         /* Compute the FNV hash value (used by SEASONAL and DEVSEASONAL
 133          * arrays. */
 134     hashed_name = FnvHash(filename);
 135     for(i=0;i<argc;i++){
 136         unsigned int ii;
 137         if (strncmp(argv[i],"DS:",3)==0){
 138             size_t old_size = sizeof(ds_def_t)*(rrd.stat_head->ds_cnt);
 139             if((rrd.ds_def = rrd_realloc(rrd.ds_def,
 140                                          old_size+sizeof(ds_def_t)))==NULL){
 141                 rrd_set_error("allocating rrd.ds_def");
 142                 rrd_free(&rrd);
 143                 return(-1);
 144             }
 145             memset(&rrd.ds_def[rrd.stat_head->ds_cnt], 0, sizeof(ds_def_t));
 146             /* extract the name and type */
 147             if (sscanf(&argv[i][3],
 148                        DS_NAM_FMT ":" DST_FMT ":%n",
 149                        rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
 150                        rrd.ds_def[rrd.stat_head->ds_cnt].dst,&offset) == 2)
 151             {
 152                 /* check for duplicate datasource names */
 153                 for(ii=0;ii<rrd.stat_head->ds_cnt;ii++)
 154                     if(strcmp(rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
 155                               rrd.ds_def[ii].ds_nam) == 0){
 156                         rrd_set_error("Duplicate DS name: %s",rrd.ds_def[ii].ds_nam);
 157                     }
 158             } else {
 159                 rrd_set_error("invalid DS format");
 160             }
 161
 162             /* parse the remainder of the arguments */
 163             switch(dst_conv(rrd.ds_def[rrd.stat_head->ds_cnt].dst))
 164             {
 165             case DST_COUNTER:
 166             case DST_ABSOLUTE:
 167             case DST_GAUGE:
 168             case DST_DERIVE:
 169                 parseGENERIC_DS(&argv[i][offset+3],&rrd, rrd.stat_head->ds_cnt);
 170                 break;
 171             case DST_CDEF:
 172                 parseCDEF_DS(&argv[i][offset+3],&rrd, rrd.stat_head->ds_cnt);
 173                 break;
 174             default:
 175                 rrd_set_error("invalid DS type specified");
 176                 break;
 177             }
 178
 179             if (rrd_test_error()) {
 180                 rrd_free(&rrd);
 181                 return -1;
 182             }
 183             rrd.stat_head -> ds_cnt++;
 184         } else if (strncmp(argv[i],"RRA:",3)==0){
 185             char *tokptr;
 186             size_t old_size = sizeof(rra_def_t)*(rrd.stat_head->rra_cnt);
 187             if((rrd.rra_def = rrd_realloc(rrd.rra_def,
 188                                           old_size+sizeof(rra_def_t)))==NULL)
 189             {
 190                 rrd_set_error("allocating rrd.rra_def");
 191                 rrd_free(&rrd);
 192                 return(-1);
 193             }
 194             memset(&rrd.rra_def[rrd.stat_head->rra_cnt], 0, sizeof(rra_def_t));
 195
 196             token = strtok_r(&argv[i][4],":", &tokptr);
 197             token_idx = error_flag = 0;
 198             while (token != NULL)
 199             {
 200                 switch(token_idx)
 201                 {
 202                 case 0:
 203                     if (sscanf(token,CF_NAM_FMT,
 204                                rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) != 1)
 205                         rrd_set_error("Failed to parse CF name");
 206                     switch(cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam))
 207                     {
 208                     case CF_HWPREDICT:
 209                         /* initialize some parameters */
 210                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].u_val = 0.1;
 211                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_beta].u_val = 1.0/288;
 212                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt =
 213                             rrd.stat_head -> rra_cnt;
 214                         /* need to mark the file version */
 215                         strcpy(rrd.stat_head->version,RRD_VERSION);
 216                         break;
 217                     case CF_DEVSEASONAL:
 218                     case CF_SEASONAL:
 219                         /* initialize some parameters */
 220                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_seasonal_gamma].u_val = 0.1;
 221                         /* fall through */
 222                     case CF_DEVPREDICT:
 223                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt = -1;
 224                         break;
 225                     case CF_FAILURES:
 226                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_delta_pos].u_val = 2.0;
 227                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_delta_neg].u_val = 2.0;
 228                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_window_len].u_cnt = 3;
 229                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_failure_threshold].u_cnt = 2;
 230                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt = -1;
 231                         break;
 232                         /* invalid consolidation function */
 233                     case -1:
 234                         rrd_set_error("Unrecognized consolidation function %s",
 235                                       rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam);
 236                     default:
 237                         break;
 238                     }
 239                     /* default: 1 pdp per cdp */
 240                     rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt = 1;
 241                     break;
 242                 case 1:
 243                     switch(cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam))
 244                     {
 245                     case CF_HWPREDICT:
 246                     case CF_DEVSEASONAL:
 247                     case CF_SEASONAL:
 248                     case CF_DEVPREDICT:
 249                     case CF_FAILURES:
 250                         rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt = atoi(token);
 251                         break;
 252                     default:
 253                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_cdp_xff_val].u_val = atof(token);
 254                         if (rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_cdp_xff_val].u_val<0.0 ||
 255                             rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_cdp_xff_val].u_val>=1.0)
 256                             rrd_set_error("Invalid xff: must be between 0 and 1");
 257                         break;
 258                     }
 259                     break;
 260                 case 2:
 261                     switch(cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam))
 262                     {
 263                     case CF_HWPREDICT:
 264                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].u_val = atof(token);
 265                         if (atof(token) <= 0.0 || atof(token) >= 1.0)
 266                             rrd_set_error("Invalid alpha: must be between 0 and 1");
 267                         break;
 268                     case CF_DEVSEASONAL:
 269                     case CF_SEASONAL:
 270                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_seasonal_gamma].u_val =
 271                             atof(token);
 272                         if (atof(token) <= 0.0 || atof(token) >= 1.0)
 273                             rrd_set_error("Invalid gamma: must be between 0 and 1");
 274                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_seasonal_smooth_idx].u_cnt
 275                             = hashed_name % rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt;
 276                         break;
 277                     case CF_FAILURES:
 278                         /* specifies the # of violations that constitutes the failure threshold */
 279                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_failure_threshold].u_cnt =
 280                             atoi(token);
 281                         if (atoi(token) < 1 || atoi(token) > MAX_FAILURES_WINDOW_LEN)
 282                             rrd_set_error("Failure threshold is out of range %d, %d",1,
 283                                           MAX_FAILURES_WINDOW_LEN);
 284                         break;
 285                     case CF_DEVPREDICT:
 286                         /* specifies the index (1-based) of CF_DEVSEASONAL array
 287                          * associated with this CF_DEVPREDICT array. */
 288                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt =
 289                             atoi(token) - 1;
 290                         break;
 291                     default:
 292                         rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt = atoi(token);
 293                         break;
 294                     }
 295                     break;
 296                 case 3:
 297                     switch(cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam))
 298                     {
 299                     case CF_HWPREDICT:
 300                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_beta].u_val = atof(token);
 301                         if (atof(token) < 0.0 || atof(token) > 1.0)
 302                             rrd_set_error("Invalid beta: must be between 0 and 1");
 303                         break;
 304                     case CF_DEVSEASONAL:
 305                     case CF_SEASONAL:
 306                         /* specifies the index (1-based) of CF_HWPREDICT array
 307                          * associated with this CF_DEVSEASONAL or CF_SEASONAL array.
 308                          * */
 309                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt =
 310                             atoi(token) - 1;
 311                         break;
 312                     case CF_FAILURES:
 313                         /* specifies the window length */
 314                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_window_len].u_cnt =
 315                             atoi(token);
 316                         if (atoi(token) < 1 || atoi(token) > MAX_FAILURES_WINDOW_LEN)
 317                             rrd_set_error("Window length is out of range %d, %d",1,
 318                                           MAX_FAILURES_WINDOW_LEN);
 319                         /* verify that window length exceeds the failure threshold */
 320                         if (rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_window_len].u_cnt <
 321                             rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_failure_threshold].u_cnt)
 322                             rrd_set_error("Window length is shorter than the failure threshold");
 323                         break;
 324                     case CF_DEVPREDICT:
 325                         /* shouldn't be any more arguments */
 326                         rrd_set_error("Unexpected extra argument for consolidation function DEVPREDICT");
 327                         break;
 328                     default:
 329                         rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt = atoi(token);
 330                         break;
 331                     }
 332                     break;
 333                 case 4:
 334                     switch(cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam))
 335                     {
 336                     case CF_FAILURES:
 337                         /* specifies the index (1-based) of CF_DEVSEASONAL array
 338                          * associated with this CF_DEVFAILURES array. */
 339                         rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt =
 340                             atoi(token) - 1;
 341                         break;
 342                     case CF_HWPREDICT:
 343                         /* length of the associated CF_SEASONAL and CF_DEVSEASONAL arrays. */
 344                         period = atoi(token);
 345                         if (period > rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt)
 346                             rrd_set_error("Length of seasonal cycle exceeds length of HW prediction array");
 347                         break;
 348                     default:
 349                         /* shouldn't be any more arguments */
 350                         rrd_set_error("Unexpected extra argument for consolidation function %s",
 351                                       rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam);
 352                         break;
 353                     }
 354                     break;
 355                 case 5:
 356                     /* If we are here, this must be a CF_HWPREDICT RRA.
 357                      * Specifies the index (1-based) of CF_SEASONAL array
 358                      * associated with this CF_HWPREDICT array. If this argument
 359                      * is missing, then the CF_SEASONAL, CF_DEVSEASONAL, CF_DEVPREDICT,
 360                      * CF_FAILURES.
 361                      * arrays are created automatically. */
 362                     rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt =
 363                         atoi(token) - 1;
 364                     break;
 365                 default:
 366                     /* should never get here */
 367                     rrd_set_error("Unknown error");
 368                     break;
 369                 } /* end switch */
 370                 if (rrd_test_error())
 371                 {
 372                     /* all errors are unrecoverable */
 373                     rrd_free(&rrd);
 374                     return (-1);
 375                 }
 376                 token = strtok_r(NULL,":", &tokptr);
 377                 token_idx++;
 378             } /* end while */
 379 #ifdef DEBUG
 380             fprintf(stderr,"Creating RRA CF: %s, dep idx %lu, current idx %lu\n",
 381                     rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam,
 382                     rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt,
 383                     rrd.stat_head -> rra_cnt);
 384 #endif
 385             /* should we create CF_SEASONAL, CF_DEVSEASONAL, and CF_DEVPREDICT? */
 386             if (cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) == CF_HWPREDICT
 387                 && rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_dependent_rra_idx].u_cnt
 388                 == rrd.stat_head -> rra_cnt)
 389             {
 390 #ifdef DEBUG
 391                 fprintf(stderr,"Creating HW contingent RRAs\n");
 392 #endif
 393                 if (create_hw_contingent_rras(&rrd,period,hashed_name) == -1) {
 394                     rrd_free(&rrd);
 395                     return -1;
 396                 }
 397             }
 398             rrd.stat_head->rra_cnt++;
 399         } else {
 400             rrd_set_error("can't parse argument '%s'",argv[i]);
 401             rrd_free(&rrd);
 402             return -1;
 403         }
 404     }
 405
 406
 407     if (rrd.stat_head->rra_cnt < 1){
 408         rrd_set_error("you must define at least one Round Robin Archive");
 409         rrd_free(&rrd);
 410         return(-1);
 411     }
 412
 413     if (rrd.stat_head->ds_cnt < 1){
 414         rrd_set_error("you must define at least one Data Source");
 415         rrd_free(&rrd);
 416         return(-1);
 417     }
 418     return rrd_create_fn(filename, &rrd);
 419 }
 420
 421 void parseGENERIC_DS(char *def,rrd_t *rrd, int ds_idx)
 422 {
 423     char minstr[DS_NAM_SIZE], maxstr[DS_NAM_SIZE];
 424     /*
 425       int temp;
 426
 427       temp = sscanf(def,"%lu:%18[^:]:%18[^:]",
 428       &(rrd -> ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
 429       minstr,maxstr);
 430     */
 431     if (sscanf(def,"%lu:%18[^:]:%18[^:]",
 432                &(rrd -> ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
 433                minstr,maxstr) == 3)
 434     {
 435         if (minstr[0] == 'U' && minstr[1] == 0)
 436             rrd -> ds_def[ds_idx].par[DS_min_val].u_val = DNAN;
 437         else
 438             rrd -> ds_def[ds_idx].par[DS_min_val].u_val = atof(minstr);
 439
 440         if (maxstr[0] == 'U' && maxstr[1] == 0)
 441             rrd -> ds_def[ds_idx].par[DS_max_val].u_val = DNAN;
 442         else
 443             rrd -> ds_def[ds_idx].par[DS_max_val].u_val  = atof(maxstr);
 444
 445         if (! isnan(rrd -> ds_def[ds_idx].par[DS_min_val].u_val) &&
 446             ! isnan(rrd -> ds_def[ds_idx].par[DS_max_val].u_val) &&
 447             rrd -> ds_def[ds_idx].par[DS_min_val].u_val
 448             >= rrd -> ds_def[ds_idx].par[DS_max_val].u_val ) {
 449             rrd_set_error("min must be less than max in DS definition");
 450             return;
 451         }
 452     } else {
 453         rrd_set_error("failed to parse data source %s", def);
 454     }
 455 }
 456
 457 /* Create the CF_DEVPREDICT, CF_DEVSEASONAL, CF_SEASONAL, and CF_FAILURES RRAs
 458  * associated with a CF_HWPREDICT RRA. */
 459 int
 460 create_hw_contingent_rras(rrd_t *rrd, unsigned short period, unsigned long hashed_name)
 461 {
 462     size_t old_size;
 463     rra_def_t* current_rra;
 464
 465     /* save index to CF_HWPREDICT */
 466     unsigned long hw_index = rrd -> stat_head -> rra_cnt;
 467     /* advance the pointer */
 468     (rrd -> stat_head -> rra_cnt)++;
 469     /* allocate the memory for the 4 contingent RRAs */
 470     old_size = sizeof(rra_def_t)*(rrd -> stat_head->rra_cnt);
 471     if ((rrd -> rra_def = rrd_realloc(rrd -> rra_def,
 472                                       old_size+4*sizeof(rra_def_t)))==NULL)
 473     {
 474         rrd_set_error("allocating rrd.rra_def");
 475         return(-1);
 476     }
 477     /* clear memory */
 478     memset(&(rrd -> rra_def[rrd -> stat_head->rra_cnt]), 0, 4*sizeof(rra_def_t));
 479
 480     /* create the CF_SEASONAL RRA */
 481     current_rra = &(rrd -> rra_def[rrd -> stat_head -> rra_cnt]);
 482     strcpy(current_rra -> cf_nam,"SEASONAL");
 483     current_rra -> row_cnt = period;
 484     current_rra -> par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
 485     current_rra -> pdp_cnt = 1;
 486     current_rra -> par[RRA_seasonal_gamma].u_val =
 487         rrd -> rra_def[hw_index].par[RRA_hw_alpha].u_val;
 488     current_rra -> par[RRA_dependent_rra_idx].u_cnt = hw_index;
 489     rrd -> rra_def[hw_index].par[RRA_dependent_rra_idx].u_cnt = rrd -> stat_head -> rra_cnt;
 490
 491     /* create the CF_DEVSEASONAL RRA */
 492     (rrd -> stat_head -> rra_cnt)++;
 493     current_rra = &(rrd -> rra_def[rrd -> stat_head -> rra_cnt]);
 494     strcpy(current_rra -> cf_nam,"DEVSEASONAL");
 495     current_rra -> row_cnt = period;
 496     current_rra -> par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
 497     current_rra -> pdp_cnt = 1;
 498     current_rra -> par[RRA_seasonal_gamma].u_val =
 499         rrd -> rra_def[hw_index].par[RRA_hw_alpha].u_val;
 500     current_rra -> par[RRA_dependent_rra_idx].u_cnt = hw_index;
 501
 502     /* create the CF_DEVPREDICT RRA */
 503     (rrd -> stat_head -> rra_cnt)++;
 504     current_rra = &(rrd -> rra_def[rrd -> stat_head -> rra_cnt]);
 505     strcpy(current_rra -> cf_nam,"DEVPREDICT");
 506     current_rra -> row_cnt = (rrd -> rra_def[hw_index]).row_cnt;
 507     current_rra -> pdp_cnt = 1;
 508     current_rra -> par[RRA_dependent_rra_idx].u_cnt
 509         = hw_index + 2; /* DEVSEASONAL */
 510
 511     /* create the CF_FAILURES RRA */
 512     (rrd -> stat_head -> rra_cnt)++;
 513     current_rra = &(rrd -> rra_def[rrd -> stat_head -> rra_cnt]);
 514     strcpy(current_rra -> cf_nam,"FAILURES");
 515     current_rra -> row_cnt = period;
 516     current_rra -> pdp_cnt = 1;
 517     current_rra -> par[RRA_delta_pos].u_val = 2.0;
 518     current_rra -> par[RRA_delta_neg].u_val = 2.0;
 519     current_rra -> par[RRA_failure_threshold].u_cnt = 7;
 520     current_rra -> par[RRA_window_len].u_cnt = 9;
 521     current_rra -> par[RRA_dependent_rra_idx].u_cnt =
 522         hw_index + 2; /* DEVSEASONAL */
 523     return 0;
 524 }
 525
 526 /* create and empty rrd file according to the specs given */
 527
 528 int
 529 rrd_create_fn(char *file_name, rrd_t *rrd)
 530 {
 531     unsigned long    i,ii;
 532     FILE             *rrd_file;
 533     rrd_value_t       unknown = DNAN ;
 534
 535     if ((rrd_file = fopen(file_name,"wb")) == NULL ) {
 536         rrd_set_error("creating '%s': %s",file_name, rrd_strerror(errno));
 537         free(rrd->stat_head);
 538         free(rrd->ds_def);
 539         free(rrd->rra_def);
 540         return(-1);
 541     }
 542
 543     fwrite(rrd->stat_head,
 544            sizeof(stat_head_t), 1, rrd_file);
 545
 546     fwrite(rrd->ds_def,
 547            sizeof(ds_def_t), rrd->stat_head->ds_cnt, rrd_file);
 548
 549     fwrite(rrd->rra_def,
 550            sizeof(rra_def_t), rrd->stat_head->rra_cnt, rrd_file);
 551
 552     fwrite(rrd->live_head,
 553            sizeof(live_head_t),1, rrd_file);
 554
 555     if((rrd->pdp_prep = calloc(1,sizeof(pdp_prep_t))) == NULL){
 556         rrd_set_error("allocating pdp_prep");
 557         rrd_free(rrd);
 558         fclose(rrd_file);
 559         return(-1);
 560     }
 561
 562     strcpy(rrd->pdp_prep->last_ds,"UNKN");
 563
 564     rrd->pdp_prep->scratch[PDP_val].u_val = 0.0;
 565     rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt =
 566         rrd->live_head->last_up % rrd->stat_head->pdp_step;
 567
 568     for(i=0; i < rrd->stat_head->ds_cnt; i++)
 569         fwrite( rrd->pdp_prep,sizeof(pdp_prep_t),1,rrd_file);
 570
 571     if((rrd->cdp_prep = calloc(1,sizeof(cdp_prep_t))) == NULL){
 572         rrd_set_error("allocating cdp_prep");
 573         rrd_free(rrd);
 574         fclose(rrd_file);
 575         return(-1);
 576     }
 577
 578
 579     for(i=0; i < rrd->stat_head->rra_cnt; i++) {
 580        switch (cf_conv(rrd->rra_def[i].cf_nam))
 581            {
 582            case CF_HWPREDICT:
 583                init_hwpredict_cdp(rrd->cdp_prep);
 584                break;
 585            case CF_SEASONAL:
 586            case CF_DEVSEASONAL:
 587                init_seasonal_cdp(rrd->cdp_prep);
 588                break;
 589            case CF_FAILURES:
 590                /* initialize violation history to 0 */
 591                for (ii = 0; ii < MAX_CDP_PAR_EN; ii++)
 592                {
 593                                 /* We can zero everything out, by setting u_val to the
 594                                  * NULL address. Each array entry in scratch is 8 bytes
 595                                  * (a double), but u_cnt only accessed 4 bytes (long) */
 596                    rrd->cdp_prep->scratch[ii].u_val = 0.0;
 597                }
 598                break;
 599            default:
 600                /* can not be zero because we don't know anything ... */
 601                rrd->cdp_prep->scratch[CDP_val].u_val = DNAN;
 602                /* startup missing pdp count */
 603                rrd->cdp_prep->scratch[CDP_unkn_pdp_cnt].u_cnt =
 604                    ((rrd->live_head->last_up -
 605                  rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt)
 606                     % (rrd->stat_head->pdp_step
 607                        * rrd->rra_def[i].pdp_cnt)) / rrd->stat_head->pdp_step;
 608                break;
 609            }
 610
 611        for(ii=0; ii < rrd->stat_head->ds_cnt; ii++)
 612        {
 613            fwrite( rrd->cdp_prep,sizeof(cdp_prep_t),1,rrd_file);
 614        }
 615     }
 616
 617     /* now, we must make sure that the rest of the rrd
 618        struct is properly initialized */
 619
 620     if((rrd->rra_ptr = calloc(1,sizeof(rra_ptr_t))) == NULL) {
 621         rrd_set_error("allocating rra_ptr");
 622         rrd_free(rrd);
 623         fclose(rrd_file);
 624         return(-1);
 625     }
 626
 627     /* changed this initialization to be consistent with
 628      * rrd_restore. With the old value (0), the first update
 629      * would occur for cur_row = 1 because rrd_update increments
 630      * the pointer a priori. */
 631     for (i=0; i < rrd->stat_head->rra_cnt; i++)
 632     {
 633         rrd->rra_ptr->cur_row = rrd->rra_def[i].row_cnt - 1;
 634         fwrite( rrd->rra_ptr, sizeof(rra_ptr_t),1,rrd_file);
 635     }
 636
 637     /* write the empty data area */
 638     for(i=0;
 639         i <  rrd->stat_head->rra_cnt;
 640         i++)
 641     {
 642         for(ii=0;
 643             ii <  rrd->rra_def[i].row_cnt
 644                 * rrd->stat_head->ds_cnt;
 645             ii++){
 646             fwrite(&unknown,sizeof(rrd_value_t),1,rrd_file);
 647         }
 648     }
 649
 650     /* lets see if we had an error */
 651     if(ferror(rrd_file)){
 652         rrd_set_error("a file error occurred while creating '%s'",file_name);
 653         fclose(rrd_file);
 654         rrd_free(rrd);
 655         return(-1);
 656     }
 657
 658     fclose(rrd_file);
 659     rrd_free(rrd);
 660     return (0);
 661 }