1 /*****************************************************************************
2 * RRDtool 1.4.3 Copyright by Tobi Oetiker, 1997-2010
3 *****************************************************************************
4 * rrd_create.c creates new rrds
5 *****************************************************************************/
12 #include "rrd_rpncalc.h"
14 #include "rrd_client.h"
16 #include "rrd_is_thread_safe.h"
22 unsigned long FnvHash(
24 int create_hw_contingent_rras(
26 unsigned short period,
27 unsigned long hashed_name);
33 static void rrd_free2(
34 rrd_t *rrd); /* our onwn copy, immmune to mmap */
40 struct option long_options[] = {
41 {"start", required_argument, 0, 'b'},
42 {"step", required_argument, 0, 's'},
43 {"daemon", required_argument, 0, 'd'},
44 {"no-overwrite", no_argument, 0, 'O'},
49 time_t last_up = time(NULL) - 10;
50 unsigned long pdp_step = 300;
51 rrd_time_value_t last_up_tv;
52 char *parsetime_error = NULL;
55 char * opt_daemon = NULL;
56 int opt_no_overwrite = 0;
59 opterr = 0; /* initialize getopt */
62 opt = getopt_long(argc, argv, "Ob:s:d:", long_options, &option_index);
69 if (opt_daemon != NULL)
71 opt_daemon = strdup (optarg);
72 if (opt_daemon == NULL)
74 rrd_set_error ("strdup failed.");
80 if ((parsetime_error = rrd_parsetime(optarg, &last_up_tv))) {
81 rrd_set_error("start time: %s", parsetime_error);
84 if (last_up_tv.type == RELATIVE_TO_END_TIME ||
85 last_up_tv.type == RELATIVE_TO_START_TIME) {
86 rrd_set_error("specifying time relative to the 'start' "
87 "or 'end' makes no sense here");
91 last_up = mktime(&last_up_tv.tm) +last_up_tv.offset;
93 if (last_up < 3600 * 24 * 365 * 10) {
95 ("the first entry to the RRD should be after 1980");
101 long_tmp = atol(optarg);
103 rrd_set_error("step size should be no less than one second");
110 opt_no_overwrite = 1;
115 rrd_set_error("unknown option '%c'", optopt);
117 rrd_set_error("unknown option '%s'", argv[optind - 1]);
121 if (optind == argc) {
122 rrd_set_error("need name of an rrd file to create");
126 rrdc_connect (opt_daemon);
127 if (rrdc_is_connected (opt_daemon)) {
128 rc = rrdc_create (argv[optind],
129 pdp_step, last_up, opt_no_overwrite,
130 argc - optind - 1, (const char **) (argv + optind + 1));
132 rc = rrd_create_r2(argv[optind],
133 pdp_step, last_up, opt_no_overwrite,
134 argc - optind - 1, (const char **) (argv + optind + 1));
141 /* For backwards compatibility with previous API. Use rrd_create_r2 if you
142 need to have the no_overwrite parameter. */
144 const char *filename,
145 unsigned long pdp_step,
150 return rrd_create_r2(filename,pdp_step,last_up,0,argc,argv);
153 const char *filename,
154 unsigned long pdp_step,
164 char dummychar1[2], dummychar2[2];
165 unsigned short token_idx, error_flag, period = 0;
166 unsigned long hashed_name;
168 /* clear any previous errors */
174 if ((rrd.stat_head = (stat_head_t*)calloc(1, sizeof(stat_head_t))) == NULL) {
175 rrd_set_error("allocating rrd.stat_head");
181 if ((rrd.live_head = (live_head_t*)calloc(1, sizeof(live_head_t))) == NULL) {
182 rrd_set_error("allocating rrd.live_head");
187 /* set some defaults */
188 strcpy(rrd.stat_head->cookie, RRD_COOKIE);
189 strcpy(rrd.stat_head->version, RRD_VERSION3); /* by default we are still version 3 */
190 rrd.stat_head->float_cookie = FLOAT_COOKIE;
191 rrd.stat_head->ds_cnt = 0; /* this will be adjusted later */
192 rrd.stat_head->rra_cnt = 0; /* ditto */
193 rrd.stat_head->pdp_step = pdp_step; /* 5 minute default */
195 /* a default value */
199 rrd.live_head->last_up = last_up;
201 /* optind points to the first non-option command line arg,
202 * in this case, the file name. */
203 /* Compute the FNV hash value (used by SEASONAL and DEVSEASONAL
205 hashed_name = FnvHash(filename);
206 for (i = 0; i < argc; i++) {
209 if (strncmp(argv[i], "DS:", 3) == 0) {
210 size_t old_size = sizeof(ds_def_t) * (rrd.stat_head->ds_cnt);
212 if ((rrd.ds_def = (ds_def_t*)rrd_realloc(rrd.ds_def,
213 old_size + sizeof(ds_def_t))) ==
215 rrd_set_error("allocating rrd.ds_def");
219 memset(&rrd.ds_def[rrd.stat_head->ds_cnt], 0, sizeof(ds_def_t));
220 /* extract the name and type */
221 switch (sscanf(&argv[i][3],
222 DS_NAM_FMT "%1[:]" DST_FMT "%1[:]%n",
223 rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
225 rrd.ds_def[rrd.stat_head->ds_cnt].dst,
226 dummychar2, &offset)) {
229 rrd_set_error("Invalid DS name in [%s]",&argv[i][3]);
233 rrd_set_error("Invalid DS type in [%s]",&argv[i][3]);
235 case 4: /* (%n may or may not be counted) */
236 case 5: /* check for duplicate datasource names */
237 for (ii = 0; ii < rrd.stat_head->ds_cnt; ii++)
238 if (strcmp(rrd.ds_def[rrd.stat_head->ds_cnt].ds_nam,
239 rrd.ds_def[ii].ds_nam) == 0)
240 rrd_set_error("Duplicate DS name: %s",
241 rrd.ds_def[ii].ds_nam);
242 /* DS_type may be valid or not. Checked later */
245 rrd_set_error("invalid DS format");
247 if (rrd_test_error()) {
252 /* parse the remainder of the arguments */
253 switch (dst_conv(rrd.ds_def[rrd.stat_head->ds_cnt].dst)) {
258 parseGENERIC_DS(&argv[i][offset + 3], &rrd,
259 rrd.stat_head->ds_cnt);
262 parseCDEF_DS(&argv[i][offset + 3], &rrd,
263 rrd.stat_head->ds_cnt);
266 rrd_set_error("invalid DS type specified");
270 if (rrd_test_error()) {
274 rrd.stat_head->ds_cnt++;
275 } else if (strncmp(argv[i], "RRA:", 4) == 0) {
278 size_t old_size = sizeof(rra_def_t) * (rrd.stat_head->rra_cnt);
281 if ((rrd.rra_def = (rra_def_t*)rrd_realloc(rrd.rra_def,
282 old_size + sizeof(rra_def_t))) ==
284 rrd_set_error("allocating rrd.rra_def");
288 memset(&rrd.rra_def[rrd.stat_head->rra_cnt], 0,
291 argvcopy = strdup(argv[i]);
292 token = strtok_r(&argvcopy[4], ":", &tokptr);
293 token_idx = error_flag = 0;
294 while (token != NULL) {
297 if (sscanf(token, CF_NAM_FMT,
298 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) !=
300 rrd_set_error("Failed to parse CF name");
302 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
304 strcpy(rrd.stat_head->version, RRD_VERSION); /* MHWPREDICT causes Version 4 */
306 /* initialize some parameters */
307 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].
309 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_beta].
311 rrd.rra_def[rrd.stat_head->rra_cnt].
312 par[RRA_dependent_rra_idx].u_cnt =
313 rrd.stat_head->rra_cnt;
317 /* initialize some parameters */
318 rrd.rra_def[rrd.stat_head->rra_cnt].
319 par[RRA_seasonal_gamma].u_val = 0.1;
320 rrd.rra_def[rrd.stat_head->rra_cnt].
321 par[RRA_seasonal_smoothing_window].u_val = 0.05;
324 rrd.rra_def[rrd.stat_head->rra_cnt].
325 par[RRA_dependent_rra_idx].u_cnt = -1;
328 rrd.rra_def[rrd.stat_head->rra_cnt].
329 par[RRA_delta_pos].u_val = 2.0;
330 rrd.rra_def[rrd.stat_head->rra_cnt].
331 par[RRA_delta_neg].u_val = 2.0;
332 rrd.rra_def[rrd.stat_head->rra_cnt].
333 par[RRA_window_len].u_cnt = 3;
334 rrd.rra_def[rrd.stat_head->rra_cnt].
335 par[RRA_failure_threshold].u_cnt = 2;
336 rrd.rra_def[rrd.stat_head->rra_cnt].
337 par[RRA_dependent_rra_idx].u_cnt = -1;
339 /* invalid consolidation function */
342 ("Unrecognized consolidation function %s",
343 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam);
347 /* default: 1 pdp per cdp */
348 rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt = 1;
352 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
359 row_cnt = atoi(token);
361 rrd_set_error("Invalid row count: %i", row_cnt);
362 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt = row_cnt;
365 rrd.rra_def[rrd.stat_head->rra_cnt].
366 par[RRA_cdp_xff_val].u_val = atof(token);
367 if (rrd.rra_def[rrd.stat_head->rra_cnt].
368 par[RRA_cdp_xff_val].u_val < 0.0
369 || rrd.rra_def[rrd.stat_head->rra_cnt].
370 par[RRA_cdp_xff_val].u_val >= 1.0)
372 ("Invalid xff: must be between 0 and 1");
378 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
381 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_alpha].
383 if (atof(token) <= 0.0 || atof(token) >= 1.0)
385 ("Invalid alpha: must be between 0 and 1");
389 rrd.rra_def[rrd.stat_head->rra_cnt].
390 par[RRA_seasonal_gamma].u_val = atof(token);
391 if (atof(token) <= 0.0 || atof(token) >= 1.0)
393 ("Invalid gamma: must be between 0 and 1");
394 rrd.rra_def[rrd.stat_head->rra_cnt].
395 par[RRA_seasonal_smooth_idx].u_cnt =
397 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt;
400 /* specifies the # of violations that constitutes the failure threshold */
401 rrd.rra_def[rrd.stat_head->rra_cnt].
402 par[RRA_failure_threshold].u_cnt = atoi(token);
404 || atoi(token) > MAX_FAILURES_WINDOW_LEN)
406 ("Failure threshold is out of range %d, %d",
407 1, MAX_FAILURES_WINDOW_LEN);
410 /* specifies the index (1-based) of CF_DEVSEASONAL array
411 * associated with this CF_DEVPREDICT array. */
412 rrd.rra_def[rrd.stat_head->rra_cnt].
413 par[RRA_dependent_rra_idx].u_cnt =
417 rrd.rra_def[rrd.stat_head->rra_cnt].pdp_cnt =
420 rrd_set_error("Invalid step: must be >= 1");
426 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
429 rrd.rra_def[rrd.stat_head->rra_cnt].par[RRA_hw_beta].
431 if (atof(token) < 0.0 || atof(token) > 1.0)
433 ("Invalid beta: must be between 0 and 1");
437 /* specifies the index (1-based) of CF_HWPREDICT array
438 * associated with this CF_DEVSEASONAL or CF_SEASONAL array.
440 rrd.rra_def[rrd.stat_head->rra_cnt].
441 par[RRA_dependent_rra_idx].u_cnt =
445 /* specifies the window length */
446 rrd.rra_def[rrd.stat_head->rra_cnt].
447 par[RRA_window_len].u_cnt = atoi(token);
449 || atoi(token) > MAX_FAILURES_WINDOW_LEN)
451 ("Window length is out of range %d, %d", 1,
452 MAX_FAILURES_WINDOW_LEN);
453 /* verify that window length exceeds the failure threshold */
454 if (rrd.rra_def[rrd.stat_head->rra_cnt].
455 par[RRA_window_len].u_cnt <
456 rrd.rra_def[rrd.stat_head->rra_cnt].
457 par[RRA_failure_threshold].u_cnt)
459 ("Window length is shorter than the failure threshold");
462 /* shouldn't be any more arguments */
464 ("Unexpected extra argument for consolidation function DEVPREDICT");
467 row_cnt = atoi(token);
469 rrd_set_error("Invalid row count: %i", row_cnt);
470 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt = row_cnt;
476 (rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam)) {
478 /* specifies the index (1-based) of CF_DEVSEASONAL array
479 * associated with this CF_DEVFAILURES array. */
480 rrd.rra_def[rrd.stat_head->rra_cnt].
481 par[RRA_dependent_rra_idx].u_cnt =
486 /* optional smoothing window */
487 if (sscanf(token, "smoothing-window=%lf",
488 &(rrd.rra_def[rrd.stat_head->rra_cnt].
489 par[RRA_seasonal_smoothing_window].
491 strcpy(rrd.stat_head->version, RRD_VERSION); /* smoothing-window causes Version 4 */
492 if (rrd.rra_def[rrd.stat_head->rra_cnt].
493 par[RRA_seasonal_smoothing_window].u_val < 0.0
494 || rrd.rra_def[rrd.stat_head->rra_cnt].
495 par[RRA_seasonal_smoothing_window].u_val >
498 ("Invalid smoothing-window %f: must be between 0 and 1",
499 rrd.rra_def[rrd.stat_head->rra_cnt].
500 par[RRA_seasonal_smoothing_window].
504 rrd_set_error("Invalid option %s", token);
509 /* length of the associated CF_SEASONAL and CF_DEVSEASONAL arrays. */
510 period = atoi(token);
512 rrd.rra_def[rrd.stat_head->rra_cnt].row_cnt)
514 ("Length of seasonal cycle exceeds length of HW prediction array");
517 /* shouldn't be any more arguments */
519 ("Unexpected extra argument for consolidation function %s",
520 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam);
525 /* If we are here, this must be a CF_HWPREDICT RRA.
526 * Specifies the index (1-based) of CF_SEASONAL array
527 * associated with this CF_HWPREDICT array. If this argument
528 * is missing, then the CF_SEASONAL, CF_DEVSEASONAL, CF_DEVPREDICT,
530 * arrays are created automatically. */
531 rrd.rra_def[rrd.stat_head->rra_cnt].
532 par[RRA_dependent_rra_idx].u_cnt = atoi(token) - 1;
535 /* should never get here */
536 rrd_set_error("Unknown error");
539 if (rrd_test_error()) {
540 /* all errors are unrecoverable */
545 token = strtok_r(NULL, ":", &tokptr);
551 "Creating RRA CF: %s, dep idx %lu, current idx %lu\n",
552 rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam,
553 rrd.rra_def[rrd.stat_head->rra_cnt].
554 par[RRA_dependent_rra_idx].u_cnt, rrd.stat_head->rra_cnt);
556 /* should we create CF_SEASONAL, CF_DEVSEASONAL, and CF_DEVPREDICT? */
557 if ((cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) ==
559 || cf_conv(rrd.rra_def[rrd.stat_head->rra_cnt].cf_nam) ==
561 && rrd.rra_def[rrd.stat_head->rra_cnt].
562 par[RRA_dependent_rra_idx].u_cnt == rrd.stat_head->rra_cnt) {
564 fprintf(stderr, "Creating HW contingent RRAs\n");
566 if (create_hw_contingent_rras(&rrd, period, hashed_name) ==
568 rrd_set_error("creating contingent RRA");
573 rrd.stat_head->rra_cnt++;
575 rrd_set_error("can't parse argument '%s'", argv[i]);
582 if (rrd.stat_head->rra_cnt < 1) {
583 rrd_set_error("you must define at least one Round Robin Archive");
588 if (rrd.stat_head->ds_cnt < 1) {
589 rrd_set_error("you must define at least one Data Source");
593 return rrd_create_fn(filename, &rrd, no_overwrite);
596 void parseGENERIC_DS(
601 char minstr[DS_NAM_SIZE], maxstr[DS_NAM_SIZE];
607 temp = sscanf(def,"%lu:%18[^:]:%18[^:]",
608 &(rrd -> ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
611 old_locale = setlocale(LC_NUMERIC, NULL);
612 setlocale(LC_NUMERIC, "C");
613 if (sscanf(def, "%lu:%18[^:]:%18[^:]",
614 &(rrd->ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt),
615 minstr, maxstr) == 3) {
616 if (minstr[0] == 'U' && minstr[1] == 0)
617 rrd->ds_def[ds_idx].par[DS_min_val].u_val = DNAN;
619 rrd->ds_def[ds_idx].par[DS_min_val].u_val = atof(minstr);
621 if (maxstr[0] == 'U' && maxstr[1] == 0)
622 rrd->ds_def[ds_idx].par[DS_max_val].u_val = DNAN;
624 rrd->ds_def[ds_idx].par[DS_max_val].u_val = atof(maxstr);
626 if (!isnan(rrd->ds_def[ds_idx].par[DS_min_val].u_val) &&
627 !isnan(rrd->ds_def[ds_idx].par[DS_max_val].u_val) &&
628 rrd->ds_def[ds_idx].par[DS_min_val].u_val
629 >= rrd->ds_def[ds_idx].par[DS_max_val].u_val) {
630 rrd_set_error("min must be less than max in DS definition");
631 setlocale(LC_NUMERIC, old_locale);
635 rrd_set_error("failed to parse data source %s", def);
637 setlocale(LC_NUMERIC, old_locale);
640 /* Create the CF_DEVPREDICT, CF_DEVSEASONAL, CF_SEASONAL, and CF_FAILURES RRAs
641 * associated with a CF_HWPREDICT RRA. */
642 int create_hw_contingent_rras(
644 unsigned short period,
645 unsigned long hashed_name)
648 rra_def_t *current_rra;
650 /* save index to CF_HWPREDICT */
651 unsigned long hw_index = rrd->stat_head->rra_cnt;
653 /* advance the pointer */
654 (rrd->stat_head->rra_cnt)++;
655 /* allocate the memory for the 4 contingent RRAs */
656 old_size = sizeof(rra_def_t) * (rrd->stat_head->rra_cnt);
657 if ((rrd->rra_def = (rra_def_t*)rrd_realloc(rrd->rra_def,
658 old_size + 4 * sizeof(rra_def_t))) ==
661 rrd_set_error("allocating rrd.rra_def");
665 memset(&(rrd->rra_def[rrd->stat_head->rra_cnt]), 0,
666 4 * sizeof(rra_def_t));
668 /* create the CF_SEASONAL RRA */
669 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
670 strcpy(current_rra->cf_nam, "SEASONAL");
671 current_rra->row_cnt = period;
672 current_rra->par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
673 current_rra->pdp_cnt = 1;
674 current_rra->par[RRA_seasonal_gamma].u_val =
675 rrd->rra_def[hw_index].par[RRA_hw_alpha].u_val;
676 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index;
677 rrd->rra_def[hw_index].par[RRA_dependent_rra_idx].u_cnt =
678 rrd->stat_head->rra_cnt;
680 /* create the CF_DEVSEASONAL RRA */
681 (rrd->stat_head->rra_cnt)++;
682 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
683 strcpy(current_rra->cf_nam, "DEVSEASONAL");
684 current_rra->row_cnt = period;
685 current_rra->par[RRA_seasonal_smooth_idx].u_cnt = hashed_name % period;
686 current_rra->pdp_cnt = 1;
687 current_rra->par[RRA_seasonal_gamma].u_val =
688 rrd->rra_def[hw_index].par[RRA_hw_alpha].u_val;
689 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index;
691 /* create the CF_DEVPREDICT RRA */
692 (rrd->stat_head->rra_cnt)++;
693 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
694 strcpy(current_rra->cf_nam, "DEVPREDICT");
695 current_rra->row_cnt = (rrd->rra_def[hw_index]).row_cnt;
696 current_rra->pdp_cnt = 1;
697 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index + 2; /* DEVSEASONAL */
699 /* create the CF_FAILURES RRA */
700 (rrd->stat_head->rra_cnt)++;
701 current_rra = &(rrd->rra_def[rrd->stat_head->rra_cnt]);
702 strcpy(current_rra->cf_nam, "FAILURES");
703 current_rra->row_cnt = period;
704 current_rra->pdp_cnt = 1;
705 current_rra->par[RRA_delta_pos].u_val = 2.0;
706 current_rra->par[RRA_delta_neg].u_val = 2.0;
707 current_rra->par[RRA_failure_threshold].u_cnt = 7;
708 current_rra->par[RRA_window_len].u_cnt = 9;
709 current_rra->par[RRA_dependent_rra_idx].u_cnt = hw_index + 2; /* DEVSEASONAL */
713 /* create and empty rrd file according to the specs given */
716 const char *file_name,
721 rrd_value_t *unknown;
723 rrd_file_t *rrd_file_dn;
725 unsigned rrd_flags = RRD_READWRITE | RRD_CREAT;
728 rrd_flags |= RRD_EXCL ;
732 for (i = 0; i < rrd->stat_head->rra_cnt; i++)
733 unkn_cnt += rrd->stat_head->ds_cnt * rrd->rra_def[i].row_cnt;
735 if ((rrd_file_dn = rrd_open(file_name, rrd, rrd_flags)) == NULL) {
736 rrd_set_error("creating '%s': %s", file_name, rrd_strerror(errno));
741 rrd_write(rrd_file_dn, rrd->stat_head, sizeof(stat_head_t));
743 rrd_write(rrd_file_dn, rrd->ds_def, sizeof(ds_def_t) * rrd->stat_head->ds_cnt);
745 rrd_write(rrd_file_dn, rrd->rra_def,
746 sizeof(rra_def_t) * rrd->stat_head->rra_cnt);
748 rrd_write(rrd_file_dn, rrd->live_head, sizeof(live_head_t));
750 if ((rrd->pdp_prep = (pdp_prep_t*)calloc(1, sizeof(pdp_prep_t))) == NULL) {
751 rrd_set_error("allocating pdp_prep");
753 rrd_close(rrd_file_dn);
757 strcpy(rrd->pdp_prep->last_ds, "U");
759 rrd->pdp_prep->scratch[PDP_val].u_val = 0.0;
760 rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt =
761 rrd->live_head->last_up % rrd->stat_head->pdp_step;
763 for (i = 0; i < rrd->stat_head->ds_cnt; i++)
764 rrd_write(rrd_file_dn, rrd->pdp_prep, sizeof(pdp_prep_t));
766 if ((rrd->cdp_prep = (cdp_prep_t*)calloc(1, sizeof(cdp_prep_t))) == NULL) {
767 rrd_set_error("allocating cdp_prep");
769 rrd_close(rrd_file_dn);
774 for (i = 0; i < rrd->stat_head->rra_cnt; i++) {
775 switch (cf_conv(rrd->rra_def[i].cf_nam)) {
778 init_hwpredict_cdp(rrd->cdp_prep);
782 init_seasonal_cdp(rrd->cdp_prep);
785 /* initialize violation history to 0 */
786 for (ii = 0; ii < MAX_CDP_PAR_EN; ii++) {
787 /* We can zero everything out, by setting u_val to the
788 * NULL address. Each array entry in scratch is 8 bytes
789 * (a double), but u_cnt only accessed 4 bytes (long) */
790 rrd->cdp_prep->scratch[ii].u_val = 0.0;
794 /* can not be zero because we don't know anything ... */
795 rrd->cdp_prep->scratch[CDP_val].u_val = DNAN;
796 /* startup missing pdp count */
797 rrd->cdp_prep->scratch[CDP_unkn_pdp_cnt].u_cnt =
798 ((rrd->live_head->last_up -
799 rrd->pdp_prep->scratch[PDP_unkn_sec_cnt].u_cnt)
800 % (rrd->stat_head->pdp_step
801 * rrd->rra_def[i].pdp_cnt)) / rrd->stat_head->pdp_step;
805 for (ii = 0; ii < rrd->stat_head->ds_cnt; ii++) {
806 rrd_write(rrd_file_dn, rrd->cdp_prep, sizeof(cdp_prep_t));
810 /* now, we must make sure that the rest of the rrd
811 struct is properly initialized */
813 if ((rrd->rra_ptr = (rra_ptr_t*)calloc(1, sizeof(rra_ptr_t))) == NULL) {
814 rrd_set_error("allocating rra_ptr");
816 rrd_close(rrd_file_dn);
820 /* changed this initialization to be consistent with
821 * rrd_restore. With the old value (0), the first update
822 * would occur for cur_row = 1 because rrd_update increments
823 * the pointer a priori. */
824 for (i = 0; i < rrd->stat_head->rra_cnt; i++) {
825 rrd->rra_ptr->cur_row = rrd_select_initial_row(rrd_file_dn, i, &rrd->rra_def[i]);
826 rrd_write(rrd_file_dn, rrd->rra_ptr, sizeof(rra_ptr_t));
829 /* write the empty data area */
830 if ((unknown = (rrd_value_t *) malloc(512 * sizeof(rrd_value_t))) == NULL) {
831 rrd_set_error("allocating unknown");
833 rrd_close(rrd_file_dn);
836 for (i = 0; i < 512; ++i)
839 while (unkn_cnt > 0) {
840 if(rrd_write(rrd_file_dn, unknown, sizeof(rrd_value_t) * min(unkn_cnt, 512)) < 0)
842 rrd_set_error("creating rrd: %s", rrd_strerror(errno));
850 if (rrd_close(rrd_file_dn) == -1) {
851 rrd_set_error("creating rrd: %s", rrd_strerror(errno));
854 /* flush all we don't need out of the cache */
856 if((rrd_file_dn = rrd_open(file_name, &rrd_dn, RRD_READONLY)) != NULL)
858 rrd_dontneed(rrd_file_dn, &rrd_dn);
859 /* rrd_free(&rrd_dn); */
860 rrd_close(rrd_file_dn);
866 static void rrd_free2(
869 free(rrd->live_head);
870 free(rrd->stat_head);
876 free(rrd->rrd_value);