1 /*****************************************************************************
2 * RRDtool 1.4.0 Copyright by Tobi Oetiker, 1997-2009
3 * Copyright by Florian Forster, 2008
4 *****************************************************************************
5 * rrd_update.c RRD Update Function
6 *****************************************************************************
7 * $Id$
8 *****************************************************************************/
10 #include "rrd_tool.h"
12 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
13 #include <sys/locking.h>
14 #include <sys/stat.h>
15 #include <io.h>
16 #endif
18 #include <locale.h>
20 #include "rrd_hw.h"
21 #include "rrd_rpncalc.h"
23 #include "rrd_is_thread_safe.h"
24 #include "unused.h"
26 #include "rrd_client.h"
28 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
29 /*
30 * WIN32 does not have gettimeofday and struct timeval. This is a quick and dirty
31 * replacement.
32 */
33 #include <sys/timeb.h>
35 #ifndef __MINGW32__
36 struct timeval {
37 time_t tv_sec; /* seconds */
38 long tv_usec; /* microseconds */
39 };
40 #endif
42 struct __timezone {
43 int tz_minuteswest; /* minutes W of Greenwich */
44 int tz_dsttime; /* type of dst correction */
45 };
47 static int gettimeofday(
48 struct timeval *t,
49 struct __timezone *tz)
50 {
52 struct _timeb current_time;
54 _ftime(¤t_time);
56 t->tv_sec = current_time.time;
57 t->tv_usec = current_time.millitm * 1000;
59 return 0;
60 }
62 #endif
64 /* FUNCTION PROTOTYPES */
66 int rrd_update_r(
67 const char *filename,
68 const char *tmplt,
69 int argc,
70 const char **argv);
71 int _rrd_update(
72 const char *filename,
73 const char *tmplt,
74 int argc,
75 const char **argv,
76 rrd_info_t *);
78 static int allocate_data_structures(
79 rrd_t *rrd,
80 char ***updvals,
81 rrd_value_t **pdp_temp,
82 const char *tmplt,
83 long **tmpl_idx,
84 unsigned long *tmpl_cnt,
85 unsigned long **rra_step_cnt,
86 unsigned long **skip_update,
87 rrd_value_t **pdp_new);
89 static int parse_template(
90 rrd_t *rrd,
91 const char *tmplt,
92 unsigned long *tmpl_cnt,
93 long *tmpl_idx);
95 static int process_arg(
96 char *step_start,
97 rrd_t *rrd,
98 rrd_file_t *rrd_file,
99 unsigned long rra_begin,
100 time_t *current_time,
101 unsigned long *current_time_usec,
102 rrd_value_t *pdp_temp,
103 rrd_value_t *pdp_new,
104 unsigned long *rra_step_cnt,
105 char **updvals,
106 long *tmpl_idx,
107 unsigned long tmpl_cnt,
108 rrd_info_t ** pcdp_summary,
109 int version,
110 unsigned long *skip_update,
111 int *schedule_smooth);
113 static int parse_ds(
114 rrd_t *rrd,
115 char **updvals,
116 long *tmpl_idx,
117 char *input,
118 unsigned long tmpl_cnt,
119 time_t *current_time,
120 unsigned long *current_time_usec,
121 int version);
123 static int get_time_from_reading(
124 rrd_t *rrd,
125 char timesyntax,
126 char **updvals,
127 time_t *current_time,
128 unsigned long *current_time_usec,
129 int version);
131 static int update_pdp_prep(
132 rrd_t *rrd,
133 char **updvals,
134 rrd_value_t *pdp_new,
135 double interval);
137 static int calculate_elapsed_steps(
138 rrd_t *rrd,
139 unsigned long current_time,
140 unsigned long current_time_usec,
141 double interval,
142 double *pre_int,
143 double *post_int,
144 unsigned long *proc_pdp_cnt);
146 static void simple_update(
147 rrd_t *rrd,
148 double interval,
149 rrd_value_t *pdp_new);
151 static int process_all_pdp_st(
152 rrd_t *rrd,
153 double interval,
154 double pre_int,
155 double post_int,
156 unsigned long elapsed_pdp_st,
157 rrd_value_t *pdp_new,
158 rrd_value_t *pdp_temp);
160 static int process_pdp_st(
161 rrd_t *rrd,
162 unsigned long ds_idx,
163 double interval,
164 double pre_int,
165 double post_int,
166 long diff_pdp_st,
167 rrd_value_t *pdp_new,
168 rrd_value_t *pdp_temp);
170 static int update_all_cdp_prep(
171 rrd_t *rrd,
172 unsigned long *rra_step_cnt,
173 unsigned long rra_begin,
174 rrd_file_t *rrd_file,
175 unsigned long elapsed_pdp_st,
176 unsigned long proc_pdp_cnt,
177 rrd_value_t **last_seasonal_coef,
178 rrd_value_t **seasonal_coef,
179 rrd_value_t *pdp_temp,
180 unsigned long *skip_update,
181 int *schedule_smooth);
183 static int do_schedule_smooth(
184 rrd_t *rrd,
185 unsigned long rra_idx,
186 unsigned long elapsed_pdp_st);
188 static int update_cdp_prep(
189 rrd_t *rrd,
190 unsigned long elapsed_pdp_st,
191 unsigned long start_pdp_offset,
192 unsigned long *rra_step_cnt,
193 int rra_idx,
194 rrd_value_t *pdp_temp,
195 rrd_value_t *last_seasonal_coef,
196 rrd_value_t *seasonal_coef,
197 int current_cf);
199 static void update_cdp(
200 unival *scratch,
201 int current_cf,
202 rrd_value_t pdp_temp_val,
203 unsigned long rra_step_cnt,
204 unsigned long elapsed_pdp_st,
205 unsigned long start_pdp_offset,
206 unsigned long pdp_cnt,
207 rrd_value_t xff,
208 int i,
209 int ii);
211 static void initialize_cdp_val(
212 unival *scratch,
213 int current_cf,
214 rrd_value_t pdp_temp_val,
215 unsigned long elapsed_pdp_st,
216 unsigned long start_pdp_offset,
217 unsigned long pdp_cnt);
219 static void reset_cdp(
220 rrd_t *rrd,
221 unsigned long elapsed_pdp_st,
222 rrd_value_t *pdp_temp,
223 rrd_value_t *last_seasonal_coef,
224 rrd_value_t *seasonal_coef,
225 int rra_idx,
226 int ds_idx,
227 int cdp_idx,
228 enum cf_en current_cf);
230 static rrd_value_t initialize_average_carry_over(
231 rrd_value_t pdp_temp_val,
232 unsigned long elapsed_pdp_st,
233 unsigned long start_pdp_offset,
234 unsigned long pdp_cnt);
236 static rrd_value_t calculate_cdp_val(
237 rrd_value_t cdp_val,
238 rrd_value_t pdp_temp_val,
239 unsigned long elapsed_pdp_st,
240 int current_cf,
241 int i,
242 int ii);
244 static int update_aberrant_cdps(
245 rrd_t *rrd,
246 rrd_file_t *rrd_file,
247 unsigned long rra_begin,
248 unsigned long elapsed_pdp_st,
249 rrd_value_t *pdp_temp,
250 rrd_value_t **seasonal_coef);
252 static int write_to_rras(
253 rrd_t *rrd,
254 rrd_file_t *rrd_file,
255 unsigned long *rra_step_cnt,
256 unsigned long rra_begin,
257 time_t current_time,
258 unsigned long *skip_update,
259 rrd_info_t ** pcdp_summary);
261 static int write_RRA_row(
262 rrd_file_t *rrd_file,
263 rrd_t *rrd,
264 unsigned long rra_idx,
265 unsigned short CDP_scratch_idx,
266 rrd_info_t ** pcdp_summary,
267 time_t rra_time);
269 static int smooth_all_rras(
270 rrd_t *rrd,
271 rrd_file_t *rrd_file,
272 unsigned long rra_begin);
274 #ifndef HAVE_MMAP
275 static int write_changes_to_disk(
276 rrd_t *rrd,
277 rrd_file_t *rrd_file,
278 int version);
279 #endif
281 /*
282 * normalize time as returned by gettimeofday. usec part must
283 * be always >= 0
284 */
285 static void normalize_time(
286 struct timeval *t)
287 {
288 if (t->tv_usec < 0) {
289 t->tv_sec--;
290 t->tv_usec += 1e6L;
291 }
292 }
294 /*
295 * Sets current_time and current_time_usec based on the current time.
296 * current_time_usec is set to 0 if the version number is 1 or 2.
297 */
298 static void initialize_time(
299 time_t *current_time,
300 unsigned long *current_time_usec,
301 int version)
302 {
303 struct timeval tmp_time; /* used for time conversion */
305 gettimeofday(&tmp_time, 0);
306 normalize_time(&tmp_time);
307 *current_time = tmp_time.tv_sec;
308 if (version >= 3) {
309 *current_time_usec = tmp_time.tv_usec;
310 } else {
311 *current_time_usec = 0;
312 }
313 }
315 #define IFDNAN(X,Y) (isnan(X) ? (Y) : (X));
317 rrd_info_t *rrd_update_v(
318 int argc,
319 char **argv)
320 {
321 char *tmplt = NULL;
322 rrd_info_t *result = NULL;
323 rrd_infoval_t rc;
324 char *opt_daemon = NULL;
325 struct option long_options[] = {
326 {"template", required_argument, 0, 't'},
327 {0, 0, 0, 0}
328 };
330 rc.u_int = -1;
331 optind = 0;
332 opterr = 0; /* initialize getopt */
334 while (1) {
335 int option_index = 0;
336 int opt;
338 opt = getopt_long(argc, argv, "t:", long_options, &option_index);
340 if (opt == EOF)
341 break;
343 switch (opt) {
344 case 't':
345 tmplt = optarg;
346 break;
348 case '?':
349 rrd_set_error("unknown option '%s'", argv[optind - 1]);
350 goto end_tag;
351 }
352 }
354 opt_daemon = getenv (ENV_RRDCACHED_ADDRESS);
355 if (opt_daemon != NULL) {
356 rrd_set_error ("The \"%s\" environment variable is defined, "
357 "but \"%s\" cannot work with rrdcached. Either unset "
358 "the environment variable or use \"update\" instead.",
359 ENV_RRDCACHED_ADDRESS, argv[0]);
360 goto end_tag;
361 }
363 /* need at least 2 arguments: filename, data. */
364 if (argc - optind < 2) {
365 rrd_set_error("Not enough arguments");
366 goto end_tag;
367 }
368 rc.u_int = 0;
369 result = rrd_info_push(NULL, sprintf_alloc("return_value"), RD_I_INT, rc);
370 rc.u_int = _rrd_update(argv[optind], tmplt,
371 argc - optind - 1,
372 (const char **) (argv + optind + 1), result);
373 result->value.u_int = rc.u_int;
374 end_tag:
375 return result;
376 }
378 int rrd_update(
379 int argc,
380 char **argv)
381 {
382 struct option long_options[] = {
383 {"template", required_argument, 0, 't'},
384 {"daemon", required_argument, 0, 'd'},
385 {0, 0, 0, 0}
386 };
387 int option_index = 0;
388 int opt;
389 char *tmplt = NULL;
390 int rc = -1;
391 char *opt_daemon = NULL;
393 optind = 0;
394 opterr = 0; /* initialize getopt */
396 while (1) {
397 opt = getopt_long(argc, argv, "t:d:", long_options, &option_index);
399 if (opt == EOF)
400 break;
402 switch (opt) {
403 case 't':
404 tmplt = strdup(optarg);
405 break;
407 case 'd':
408 if (opt_daemon != NULL)
409 free (opt_daemon);
410 opt_daemon = strdup (optarg);
411 if (opt_daemon == NULL)
412 {
413 rrd_set_error("strdup failed.");
414 goto out;
415 }
416 break;
418 case '?':
419 rrd_set_error("unknown option '%s'", argv[optind - 1]);
420 goto out;
421 }
422 }
424 /* need at least 2 arguments: filename, data. */
425 if (argc - optind < 2) {
426 rrd_set_error("Not enough arguments");
427 goto out;
428 }
430 { /* try to connect to rrdcached */
431 int status = rrdc_connect(opt_daemon);
432 if (status != 0) return status;
433 }
435 if ((tmplt != NULL) && rrdc_is_connected(opt_daemon))
436 {
437 rrd_set_error("The caching daemon cannot be used together with "
438 "templates yet.");
439 goto out;
440 }
442 if (! rrdc_is_connected(opt_daemon))
443 {
444 rc = rrd_update_r(argv[optind], tmplt,
445 argc - optind - 1, (const char **) (argv + optind + 1));
446 }
447 else /* we are connected */
448 {
449 rc = rrdc_update (argv[optind], /* file */
450 argc - optind - 1, /* values_num */
451 (const char *const *) (argv + optind + 1)); /* values */
452 if (rc > 0)
453 rrd_set_error("Failed sending the values to rrdcached: %s",
454 rrd_strerror (rc));
455 }
457 out:
458 if (tmplt != NULL)
459 {
460 free(tmplt);
461 tmplt = NULL;
462 }
463 if (opt_daemon != NULL)
464 {
465 free (opt_daemon);
466 opt_daemon = NULL;
467 }
468 return rc;
469 }
471 int rrd_update_r(
472 const char *filename,
473 const char *tmplt,
474 int argc,
475 const char **argv)
476 {
477 return _rrd_update(filename, tmplt, argc, argv, NULL);
478 }
480 int _rrd_update(
481 const char *filename,
482 const char *tmplt,
483 int argc,
484 const char **argv,
485 rrd_info_t * pcdp_summary)
486 {
488 int arg_i = 2;
490 unsigned long rra_begin; /* byte pointer to the rra
491 * area in the rrd file. this
492 * pointer never changes value */
493 rrd_value_t *pdp_new; /* prepare the incoming data to be added
494 * to the existing entry */
495 rrd_value_t *pdp_temp; /* prepare the pdp values to be added
496 * to the cdp values */
498 long *tmpl_idx; /* index representing the settings
499 * transported by the tmplt index */
500 unsigned long tmpl_cnt = 2; /* time and data */
501 rrd_t rrd;
502 time_t current_time = 0;
503 unsigned long current_time_usec = 0; /* microseconds part of current time */
504 char **updvals;
505 int schedule_smooth = 0;
507 /* number of elapsed PDP steps since last update */
508 unsigned long *rra_step_cnt = NULL;
510 int version; /* rrd version */
511 rrd_file_t *rrd_file;
512 char *arg_copy; /* for processing the argv */
513 unsigned long *skip_update; /* RRAs to advance but not write */
515 /* need at least 1 arguments: data. */
516 if (argc < 1) {
517 rrd_set_error("Not enough arguments");
518 goto err_out;
519 }
521 rrd_init(&rrd);
522 if ((rrd_file = rrd_open(filename, &rrd, RRD_READWRITE)) == NULL) {
523 goto err_free;
524 }
525 /* We are now at the beginning of the rra's */
526 rra_begin = rrd_file->header_len;
528 version = atoi(rrd.stat_head->version);
530 initialize_time(¤t_time, ¤t_time_usec, version);
532 /* get exclusive lock to whole file.
533 * lock gets removed when we close the file.
534 */
535 if (rrd_lock(rrd_file) != 0) {
536 rrd_set_error("could not lock RRD");
537 goto err_close;
538 }
540 if (allocate_data_structures(&rrd, &updvals,
541 &pdp_temp, tmplt, &tmpl_idx, &tmpl_cnt,
542 &rra_step_cnt, &skip_update,
543 &pdp_new) == -1) {
544 goto err_close;
545 }
547 /* loop through the arguments. */
548 for (arg_i = 0; arg_i < argc; arg_i++) {
549 if ((arg_copy = strdup(argv[arg_i])) == NULL) {
550 rrd_set_error("failed duplication argv entry");
551 break;
552 }
553 if (process_arg(arg_copy, &rrd, rrd_file, rra_begin,
554 ¤t_time, ¤t_time_usec, pdp_temp, pdp_new,
555 rra_step_cnt, updvals, tmpl_idx, tmpl_cnt,
556 &pcdp_summary, version, skip_update,
557 &schedule_smooth) == -1) {
558 if (rrd_test_error()) { /* Should have error string always here */
559 char *save_error;
561 /* Prepend file name to error message */
562 if ((save_error = strdup(rrd_get_error())) != NULL) {
563 rrd_set_error("%s: %s", filename, save_error);
564 free(save_error);
565 }
566 }
567 free(arg_copy);
568 break;
569 }
570 free(arg_copy);
571 }
573 free(rra_step_cnt);
575 /* if we got here and if there is an error and if the file has not been
576 * written to, then close things up and return. */
577 if (rrd_test_error()) {
578 goto err_free_structures;
579 }
580 #ifndef HAVE_MMAP
581 if (write_changes_to_disk(&rrd, rrd_file, version) == -1) {
582 goto err_free_structures;
583 }
584 #endif
586 /* calling the smoothing code here guarantees at most one smoothing
587 * operation per rrd_update call. Unfortunately, it is possible with bulk
588 * updates, or a long-delayed update for smoothing to occur off-schedule.
589 * This really isn't critical except during the burn-in cycles. */
590 if (schedule_smooth) {
591 smooth_all_rras(&rrd, rrd_file, rra_begin);
592 }
594 /* rrd_dontneed(rrd_file,&rrd); */
595 rrd_free(&rrd);
596 rrd_close(rrd_file);
598 free(pdp_new);
599 free(tmpl_idx);
600 free(pdp_temp);
601 free(skip_update);
602 free(updvals);
603 return 0;
605 err_free_structures:
606 free(pdp_new);
607 free(tmpl_idx);
608 free(pdp_temp);
609 free(skip_update);
610 free(updvals);
611 err_close:
612 rrd_close(rrd_file);
613 err_free:
614 rrd_free(&rrd);
615 err_out:
616 return -1;
617 }
619 /*
620 * Allocate some important arrays used, and initialize the template.
621 *
622 * When it returns, either all of the structures are allocated
623 * or none of them are.
624 *
625 * Returns 0 on success, -1 on error.
626 */
627 static int allocate_data_structures(
628 rrd_t *rrd,
629 char ***updvals,
630 rrd_value_t **pdp_temp,
631 const char *tmplt,
632 long **tmpl_idx,
633 unsigned long *tmpl_cnt,
634 unsigned long **rra_step_cnt,
635 unsigned long **skip_update,
636 rrd_value_t **pdp_new)
637 {
638 unsigned i, ii;
639 if ((*updvals = (char **) malloc(sizeof(char *)
640 * (rrd->stat_head->ds_cnt + 1))) == NULL) {
641 rrd_set_error("allocating updvals pointer array.");
642 return -1;
643 }
644 if ((*pdp_temp = (rrd_value_t *) malloc(sizeof(rrd_value_t)
645 * rrd->stat_head->ds_cnt)) ==
646 NULL) {
647 rrd_set_error("allocating pdp_temp.");
648 goto err_free_updvals;
649 }
650 if ((*skip_update = (unsigned long *) malloc(sizeof(unsigned long)
651 *
652 rrd->stat_head->rra_cnt)) ==
653 NULL) {
654 rrd_set_error("allocating skip_update.");
655 goto err_free_pdp_temp;
656 }
657 if ((*tmpl_idx = (long *) malloc(sizeof(unsigned long)
658 * (rrd->stat_head->ds_cnt + 1))) == NULL) {
659 rrd_set_error("allocating tmpl_idx.");
660 goto err_free_skip_update;
661 }
662 if ((*rra_step_cnt = (unsigned long *) malloc(sizeof(unsigned long)
663 *
664 (rrd->stat_head->
665 rra_cnt))) == NULL) {
666 rrd_set_error("allocating rra_step_cnt.");
667 goto err_free_tmpl_idx;
668 }
670 /* initialize tmplt redirector */
671 /* default config example (assume DS 1 is a CDEF DS)
672 tmpl_idx[0] -> 0; (time)
673 tmpl_idx[1] -> 1; (DS 0)
674 tmpl_idx[2] -> 3; (DS 2)
675 tmpl_idx[3] -> 4; (DS 3) */
676 (*tmpl_idx)[0] = 0; /* time */
677 for (i = 1, ii = 1; i <= rrd->stat_head->ds_cnt; i++) {
678 if (dst_conv(rrd->ds_def[i - 1].dst) != DST_CDEF)
679 (*tmpl_idx)[ii++] = i;
680 }
681 *tmpl_cnt = ii;
683 if (tmplt != NULL) {
684 if (parse_template(rrd, tmplt, tmpl_cnt, *tmpl_idx) == -1) {
685 goto err_free_rra_step_cnt;
686 }
687 }
689 if ((*pdp_new = (rrd_value_t *) malloc(sizeof(rrd_value_t)
690 * rrd->stat_head->ds_cnt)) == NULL) {
691 rrd_set_error("allocating pdp_new.");
692 goto err_free_rra_step_cnt;
693 }
695 return 0;
697 err_free_rra_step_cnt:
698 free(*rra_step_cnt);
699 err_free_tmpl_idx:
700 free(*tmpl_idx);
701 err_free_skip_update:
702 free(*skip_update);
703 err_free_pdp_temp:
704 free(*pdp_temp);
705 err_free_updvals:
706 free(*updvals);
707 return -1;
708 }
710 /*
711 * Parses tmplt and puts an ordered list of DS's into tmpl_idx.
712 *
713 * Returns 0 on success.
714 */
715 static int parse_template(
716 rrd_t *rrd,
717 const char *tmplt,
718 unsigned long *tmpl_cnt,
719 long *tmpl_idx)
720 {
721 char *dsname, *tmplt_copy;
722 unsigned int tmpl_len, i;
723 int ret = 0;
725 *tmpl_cnt = 1; /* the first entry is the time */
727 /* we should work on a writeable copy here */
728 if ((tmplt_copy = strdup(tmplt)) == NULL) {
729 rrd_set_error("error copying tmplt '%s'", tmplt);
730 ret = -1;
731 goto out;
732 }
734 dsname = tmplt_copy;
735 tmpl_len = strlen(tmplt_copy);
736 for (i = 0; i <= tmpl_len; i++) {
737 if (tmplt_copy[i] == ':' || tmplt_copy[i] == '\0') {
738 tmplt_copy[i] = '\0';
739 if (*tmpl_cnt > rrd->stat_head->ds_cnt) {
740 rrd_set_error("tmplt contains more DS definitions than RRD");
741 ret = -1;
742 goto out_free_tmpl_copy;
743 }
744 if ((tmpl_idx[(*tmpl_cnt)++] = ds_match(rrd, dsname) + 1) == 0) {
745 rrd_set_error("unknown DS name '%s'", dsname);
746 ret = -1;
747 goto out_free_tmpl_copy;
748 }
749 /* go to the next entry on the tmplt_copy */
750 if (i < tmpl_len)
751 dsname = &tmplt_copy[i + 1];
752 }
753 }
754 out_free_tmpl_copy:
755 free(tmplt_copy);
756 out:
757 return ret;
758 }
760 /*
761 * Parse an update string, updates the primary data points (PDPs)
762 * and consolidated data points (CDPs), and writes changes to the RRAs.
763 *
764 * Returns 0 on success, -1 on error.
765 */
766 static int process_arg(
767 char *step_start,
768 rrd_t *rrd,
769 rrd_file_t *rrd_file,
770 unsigned long rra_begin,
771 time_t *current_time,
772 unsigned long *current_time_usec,
773 rrd_value_t *pdp_temp,
774 rrd_value_t *pdp_new,
775 unsigned long *rra_step_cnt,
776 char **updvals,
777 long *tmpl_idx,
778 unsigned long tmpl_cnt,
779 rrd_info_t ** pcdp_summary,
780 int version,
781 unsigned long *skip_update,
782 int *schedule_smooth)
783 {
784 rrd_value_t *seasonal_coef = NULL, *last_seasonal_coef = NULL;
786 /* a vector of future Holt-Winters seasonal coefs */
787 unsigned long elapsed_pdp_st;
789 double interval, pre_int, post_int; /* interval between this and
790 * the last run */
791 unsigned long proc_pdp_cnt;
793 if (parse_ds(rrd, updvals, tmpl_idx, step_start, tmpl_cnt,
794 current_time, current_time_usec, version) == -1) {
795 return -1;
796 }
798 interval = (double) (*current_time - rrd->live_head->last_up)
799 + (double) ((long) *current_time_usec -
800 (long) rrd->live_head->last_up_usec) / 1e6f;
802 /* process the data sources and update the pdp_prep
803 * area accordingly */
804 if (update_pdp_prep(rrd, updvals, pdp_new, interval) == -1) {
805 return -1;
806 }
808 elapsed_pdp_st = calculate_elapsed_steps(rrd,
809 *current_time,
810 *current_time_usec, interval,
811 &pre_int, &post_int,
812 &proc_pdp_cnt);
814 /* has a pdp_st moment occurred since the last run ? */
815 if (elapsed_pdp_st == 0) {
816 /* no we have not passed a pdp_st moment. therefore update is simple */
817 simple_update(rrd, interval, pdp_new);
818 } else {
819 /* an pdp_st has occurred. */
820 if (process_all_pdp_st(rrd, interval,
821 pre_int, post_int,
822 elapsed_pdp_st, pdp_new, pdp_temp) == -1) {
823 return -1;
824 }
825 if (update_all_cdp_prep(rrd, rra_step_cnt,
826 rra_begin, rrd_file,
827 elapsed_pdp_st,
828 proc_pdp_cnt,
829 &last_seasonal_coef,
830 &seasonal_coef,
831 pdp_temp,
832 skip_update, schedule_smooth) == -1) {
833 goto err_free_coefficients;
834 }
835 if (update_aberrant_cdps(rrd, rrd_file, rra_begin,
836 elapsed_pdp_st, pdp_temp,
837 &seasonal_coef) == -1) {
838 goto err_free_coefficients;
839 }
840 if (write_to_rras(rrd, rrd_file, rra_step_cnt, rra_begin,
841 *current_time, skip_update,
842 pcdp_summary) == -1) {
843 goto err_free_coefficients;
844 }
845 } /* endif a pdp_st has occurred */
846 rrd->live_head->last_up = *current_time;
847 rrd->live_head->last_up_usec = *current_time_usec;
849 if (version < 3) {
850 *rrd->legacy_last_up = rrd->live_head->last_up;
851 }
852 free(seasonal_coef);
853 free(last_seasonal_coef);
854 return 0;
856 err_free_coefficients:
857 free(seasonal_coef);
858 free(last_seasonal_coef);
859 return -1;
860 }
862 /*
863 * Parse a DS string (time + colon-separated values), storing the
864 * results in current_time, current_time_usec, and updvals.
865 *
866 * Returns 0 on success, -1 on error.
867 */
868 static int parse_ds(
869 rrd_t *rrd,
870 char **updvals,
871 long *tmpl_idx,
872 char *input,
873 unsigned long tmpl_cnt,
874 time_t *current_time,
875 unsigned long *current_time_usec,
876 int version)
877 {
878 char *p;
879 unsigned long i;
880 char timesyntax;
882 updvals[0] = input;
883 /* initialize all ds input to unknown except the first one
884 which has always got to be set */
885 for (i = 1; i <= rrd->stat_head->ds_cnt; i++)
886 updvals[i] = "U";
888 /* separate all ds elements; first must be examined separately
889 due to alternate time syntax */
890 if ((p = strchr(input, '@')) != NULL) {
891 timesyntax = '@';
892 } else if ((p = strchr(input, ':')) != NULL) {
893 timesyntax = ':';
894 } else {
895 rrd_set_error("expected timestamp not found in data source from %s",
896 input);
897 return -1;
898 }
899 *p = '\0';
900 i = 1;
901 updvals[tmpl_idx[i++]] = p + 1;
902 while (*(++p)) {
903 if (*p == ':') {
904 *p = '\0';
905 if (i < tmpl_cnt) {
906 updvals[tmpl_idx[i++]] = p + 1;
907 }
908 }
909 }
911 if (i != tmpl_cnt) {
912 rrd_set_error("expected %lu data source readings (got %lu) from %s",
913 tmpl_cnt - 1, i, input);
914 return -1;
915 }
917 if (get_time_from_reading(rrd, timesyntax, updvals,
918 current_time, current_time_usec,
919 version) == -1) {
920 return -1;
921 }
922 return 0;
923 }
925 /*
926 * Parse the time in a DS string, store it in current_time and
927 * current_time_usec and verify that it's later than the last
928 * update for this DS.
929 *
930 * Returns 0 on success, -1 on error.
931 */
932 static int get_time_from_reading(
933 rrd_t *rrd,
934 char timesyntax,
935 char **updvals,
936 time_t *current_time,
937 unsigned long *current_time_usec,
938 int version)
939 {
940 double tmp;
941 char *parsetime_error = NULL;
942 char *old_locale;
943 rrd_time_value_t ds_tv;
944 struct timeval tmp_time; /* used for time conversion */
946 /* get the time from the reading ... handle N */
947 if (timesyntax == '@') { /* at-style */
948 if ((parsetime_error = rrd_parsetime(updvals[0], &ds_tv))) {
949 rrd_set_error("ds time: %s: %s", updvals[0], parsetime_error);
950 return -1;
951 }
952 if (ds_tv.type == RELATIVE_TO_END_TIME ||
953 ds_tv.type == RELATIVE_TO_START_TIME) {
954 rrd_set_error("specifying time relative to the 'start' "
955 "or 'end' makes no sense here: %s", updvals[0]);
956 return -1;
957 }
958 *current_time = mktime(&ds_tv.tm) +ds_tv.offset;
959 *current_time_usec = 0; /* FIXME: how to handle usecs here ? */
960 } else if (strcmp(updvals[0], "N") == 0) {
961 gettimeofday(&tmp_time, 0);
962 normalize_time(&tmp_time);
963 *current_time = tmp_time.tv_sec;
964 *current_time_usec = tmp_time.tv_usec;
965 } else {
966 old_locale = setlocale(LC_NUMERIC, "C");
967 errno = 0;
968 tmp = strtod(updvals[0], 0);
969 if (errno > 0) {
970 rrd_set_error("converting '%s' to float: %s",
971 updvals[0], rrd_strerror(errno));
972 return -1;
973 };
974 setlocale(LC_NUMERIC, old_locale);
975 if (tmp < 0.0){
976 gettimeofday(&tmp_time, 0);
977 tmp = (double)tmp_time.tv_sec + (double)tmp_time.tv_usec * 1e-6f + tmp;
978 }
980 *current_time = floor(tmp);
981 *current_time_usec = (long) ((tmp - (double) *current_time) * 1e6f);
982 }
983 /* dont do any correction for old version RRDs */
984 if (version < 3)
985 *current_time_usec = 0;
987 if (*current_time < rrd->live_head->last_up ||
988 (*current_time == rrd->live_head->last_up &&
989 (long) *current_time_usec <= (long) rrd->live_head->last_up_usec)) {
990 rrd_set_error("illegal attempt to update using time %ld when "
991 "last update time is %ld (minimum one second step)",
992 *current_time, rrd->live_head->last_up);
993 return -1;
994 }
995 return 0;
996 }
998 /*
999 * Update pdp_new by interpreting the updvals according to the DS type
1000 * (COUNTER, GAUGE, etc.).
1001 *
1002 * Returns 0 on success, -1 on error.
1003 */
1004 static int update_pdp_prep(
1005 rrd_t *rrd,
1006 char **updvals,
1007 rrd_value_t *pdp_new,
1008 double interval)
1009 {
1010 unsigned long ds_idx;
1011 int ii;
1012 char *endptr; /* used in the conversion */
1013 double rate;
1014 char *old_locale;
1015 enum dst_en dst_idx;
1017 for (ds_idx = 0; ds_idx < rrd->stat_head->ds_cnt; ds_idx++) {
1018 dst_idx = dst_conv(rrd->ds_def[ds_idx].dst);
1020 /* make sure we do not build diffs with old last_ds values */
1021 if (rrd->ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt < interval) {
1022 strncpy(rrd->pdp_prep[ds_idx].last_ds, "U", LAST_DS_LEN - 1);
1023 rrd->pdp_prep[ds_idx].last_ds[LAST_DS_LEN - 1] = '\0';
1024 }
1026 /* NOTE: DST_CDEF should never enter this if block, because
1027 * updvals[ds_idx+1][0] is initialized to 'U'; unless the caller
1028 * accidently specified a value for the DST_CDEF. To handle this case,
1029 * an extra check is required. */
1031 if ((updvals[ds_idx + 1][0] != 'U') &&
1032 (dst_idx != DST_CDEF) &&
1033 rrd->ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt >= interval) {
1034 rate = DNAN;
1036 /* pdp_new contains rate * time ... eg the bytes transferred during
1037 * the interval. Doing it this way saves a lot of math operations
1038 */
1039 switch (dst_idx) {
1040 case DST_COUNTER:
1041 case DST_DERIVE:
1042 for (ii = 0; updvals[ds_idx + 1][ii] != '\0'; ii++) {
1043 if ((updvals[ds_idx + 1][ii] < '0'
1044 || updvals[ds_idx + 1][ii] > '9')
1045 && (ii != 0 && updvals[ds_idx + 1][ii] != '-')) {
1046 rrd_set_error("not a simple integer: '%s'",
1047 updvals[ds_idx + 1]);
1048 return -1;
1049 }
1050 }
1051 if (rrd->pdp_prep[ds_idx].last_ds[0] != 'U') {
1052 pdp_new[ds_idx] =
1053 rrd_diff(updvals[ds_idx + 1],
1054 rrd->pdp_prep[ds_idx].last_ds);
1055 if (dst_idx == DST_COUNTER) {
1056 /* simple overflow catcher. This will fail
1057 * terribly for non 32 or 64 bit counters
1058 * ... are there any others in SNMP land?
1059 */
1060 if (pdp_new[ds_idx] < (double) 0.0)
1061 pdp_new[ds_idx] += (double) 4294967296.0; /* 2^32 */
1062 if (pdp_new[ds_idx] < (double) 0.0)
1063 pdp_new[ds_idx] += (double) 18446744069414584320.0; /* 2^64-2^32 */
1064 }
1065 rate = pdp_new[ds_idx] / interval;
1066 } else {
1067 pdp_new[ds_idx] = DNAN;
1068 }
1069 break;
1070 case DST_ABSOLUTE:
1071 old_locale = setlocale(LC_NUMERIC, "C");
1072 errno = 0;
1073 pdp_new[ds_idx] = strtod(updvals[ds_idx + 1], &endptr);
1074 if (errno > 0) {
1075 rrd_set_error("converting '%s' to float: %s",
1076 updvals[ds_idx + 1], rrd_strerror(errno));
1077 return -1;
1078 };
1079 setlocale(LC_NUMERIC, old_locale);
1080 if (endptr[0] != '\0') {
1081 rrd_set_error
1082 ("conversion of '%s' to float not complete: tail '%s'",
1083 updvals[ds_idx + 1], endptr);
1084 return -1;
1085 }
1086 rate = pdp_new[ds_idx] / interval;
1087 break;
1088 case DST_GAUGE:
1089 old_locale = setlocale(LC_NUMERIC, "C");
1090 errno = 0;
1091 pdp_new[ds_idx] =
1092 strtod(updvals[ds_idx + 1], &endptr) * interval;
1093 if (errno) {
1094 rrd_set_error("converting '%s' to float: %s",
1095 updvals[ds_idx + 1], rrd_strerror(errno));
1096 return -1;
1097 };
1098 setlocale(LC_NUMERIC, old_locale);
1099 if (endptr[0] != '\0') {
1100 rrd_set_error
1101 ("conversion of '%s' to float not complete: tail '%s'",
1102 updvals[ds_idx + 1], endptr);
1103 return -1;
1104 }
1105 rate = pdp_new[ds_idx] / interval;
1106 break;
1107 default:
1108 rrd_set_error("rrd contains unknown DS type : '%s'",
1109 rrd->ds_def[ds_idx].dst);
1110 return -1;
1111 }
1112 /* break out of this for loop if the error string is set */
1113 if (rrd_test_error()) {
1114 return -1;
1115 }
1116 /* make sure pdp_temp is neither too large or too small
1117 * if any of these occur it becomes unknown ...
1118 * sorry folks ... */
1119 if (!isnan(rate) &&
1120 ((!isnan(rrd->ds_def[ds_idx].par[DS_max_val].u_val) &&
1121 rate > rrd->ds_def[ds_idx].par[DS_max_val].u_val) ||
1122 (!isnan(rrd->ds_def[ds_idx].par[DS_min_val].u_val) &&
1123 rate < rrd->ds_def[ds_idx].par[DS_min_val].u_val))) {
1124 pdp_new[ds_idx] = DNAN;
1125 }
1126 } else {
1127 /* no news is news all the same */
1128 pdp_new[ds_idx] = DNAN;
1129 }
1132 /* make a copy of the command line argument for the next run */
1133 #ifdef DEBUG
1134 fprintf(stderr, "prep ds[%lu]\t"
1135 "last_arg '%s'\t"
1136 "this_arg '%s'\t"
1137 "pdp_new %10.2f\n",
1138 ds_idx, rrd->pdp_prep[ds_idx].last_ds, updvals[ds_idx + 1],
1139 pdp_new[ds_idx]);
1140 #endif
1141 strncpy(rrd->pdp_prep[ds_idx].last_ds, updvals[ds_idx + 1],
1142 LAST_DS_LEN - 1);
1143 rrd->pdp_prep[ds_idx].last_ds[LAST_DS_LEN - 1] = '\0';
1144 }
1145 return 0;
1146 }
1148 /*
1149 * How many PDP steps have elapsed since the last update? Returns the answer,
1150 * and stores the time between the last update and the last PDP in pre_time,
1151 * and the time between the last PDP and the current time in post_int.
1152 */
1153 static int calculate_elapsed_steps(
1154 rrd_t *rrd,
1155 unsigned long current_time,
1156 unsigned long current_time_usec,
1157 double interval,
1158 double *pre_int,
1159 double *post_int,
1160 unsigned long *proc_pdp_cnt)
1161 {
1162 unsigned long proc_pdp_st; /* which pdp_st was the last to be processed */
1163 unsigned long occu_pdp_st; /* when was the pdp_st before the last update
1164 * time */
1165 unsigned long proc_pdp_age; /* how old was the data in the pdp prep area
1166 * when it was last updated */
1167 unsigned long occu_pdp_age; /* how long ago was the last pdp_step time */
1169 /* when was the current pdp started */
1170 proc_pdp_age = rrd->live_head->last_up % rrd->stat_head->pdp_step;
1171 proc_pdp_st = rrd->live_head->last_up - proc_pdp_age;
1173 /* when did the last pdp_st occur */
1174 occu_pdp_age = current_time % rrd->stat_head->pdp_step;
1175 occu_pdp_st = current_time - occu_pdp_age;
1177 if (occu_pdp_st > proc_pdp_st) {
1178 /* OK we passed the pdp_st moment */
1179 *pre_int = (long) occu_pdp_st - rrd->live_head->last_up; /* how much of the input data
1180 * occurred before the latest
1181 * pdp_st moment*/
1182 *pre_int -= ((double) rrd->live_head->last_up_usec) / 1e6f; /* adjust usecs */
1183 *post_int = occu_pdp_age; /* how much after it */
1184 *post_int += ((double) current_time_usec) / 1e6f; /* adjust usecs */
1185 } else {
1186 *pre_int = interval;
1187 *post_int = 0;
1188 }
1190 *proc_pdp_cnt = proc_pdp_st / rrd->stat_head->pdp_step;
1192 #ifdef DEBUG
1193 printf("proc_pdp_age %lu\t"
1194 "proc_pdp_st %lu\t"
1195 "occu_pfp_age %lu\t"
1196 "occu_pdp_st %lu\t"
1197 "int %lf\t"
1198 "pre_int %lf\t"
1199 "post_int %lf\n", proc_pdp_age, proc_pdp_st,
1200 occu_pdp_age, occu_pdp_st, interval, *pre_int, *post_int);
1201 #endif
1203 /* compute the number of elapsed pdp_st moments */
1204 return (occu_pdp_st - proc_pdp_st) / rrd->stat_head->pdp_step;
1205 }
1207 /*
1208 * Increment the PDP values by the values in pdp_new, or else initialize them.
1209 */
1210 static void simple_update(
1211 rrd_t *rrd,
1212 double interval,
1213 rrd_value_t *pdp_new)
1214 {
1215 int i;
1217 for (i = 0; i < (signed) rrd->stat_head->ds_cnt; i++) {
1218 if (isnan(pdp_new[i])) {
1219 /* this is not really accurate if we use subsecond data arrival time
1220 should have thought of it when going subsecond resolution ...
1221 sorry next format change we will have it! */
1222 rrd->pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt +=
1223 floor(interval);
1224 } else {
1225 if (isnan(rrd->pdp_prep[i].scratch[PDP_val].u_val)) {
1226 rrd->pdp_prep[i].scratch[PDP_val].u_val = pdp_new[i];
1227 } else {
1228 rrd->pdp_prep[i].scratch[PDP_val].u_val += pdp_new[i];
1229 }
1230 }
1231 #ifdef DEBUG
1232 fprintf(stderr,
1233 "NO PDP ds[%i]\t"
1234 "value %10.2f\t"
1235 "unkn_sec %5lu\n",
1236 i,
1237 rrd->pdp_prep[i].scratch[PDP_val].u_val,
1238 rrd->pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt);
1239 #endif
1240 }
1241 }
1243 /*
1244 * Call process_pdp_st for each DS.
1245 *
1246 * Returns 0 on success, -1 on error.
1247 */
1248 static int process_all_pdp_st(
1249 rrd_t *rrd,
1250 double interval,
1251 double pre_int,
1252 double post_int,
1253 unsigned long elapsed_pdp_st,
1254 rrd_value_t *pdp_new,
1255 rrd_value_t *pdp_temp)
1256 {
1257 unsigned long ds_idx;
1259 /* in pdp_prep[].scratch[PDP_val].u_val we have collected
1260 rate*seconds which occurred up to the last run.
1261 pdp_new[] contains rate*seconds from the latest run.
1262 pdp_temp[] will contain the rate for cdp */
1264 for (ds_idx = 0; ds_idx < rrd->stat_head->ds_cnt; ds_idx++) {
1265 if (process_pdp_st(rrd, ds_idx, interval, pre_int, post_int,
1266 elapsed_pdp_st * rrd->stat_head->pdp_step,
1267 pdp_new, pdp_temp) == -1) {
1268 return -1;
1269 }
1270 #ifdef DEBUG
1271 fprintf(stderr, "PDP UPD ds[%lu]\t"
1272 "elapsed_pdp_st %lu\t"
1273 "pdp_temp %10.2f\t"
1274 "new_prep %10.2f\t"
1275 "new_unkn_sec %5lu\n",
1276 ds_idx,
1277 elapsed_pdp_st,
1278 pdp_temp[ds_idx],
1279 rrd->pdp_prep[ds_idx].scratch[PDP_val].u_val,
1280 rrd->pdp_prep[ds_idx].scratch[PDP_unkn_sec_cnt].u_cnt);
1281 #endif
1282 }
1283 return 0;
1284 }
1286 /*
1287 * Process an update that occurs after one of the PDP moments.
1288 * Increments the PDP value, sets NAN if time greater than the
1289 * heartbeats have elapsed, processes CDEFs.
1290 *
1291 * Returns 0 on success, -1 on error.
1292 */
1293 static int process_pdp_st(
1294 rrd_t *rrd,
1295 unsigned long ds_idx,
1296 double interval,
1297 double pre_int,
1298 double post_int,
1299 long diff_pdp_st, /* number of seconds in full steps passed since last update */
1300 rrd_value_t *pdp_new,
1301 rrd_value_t *pdp_temp)
1302 {
1303 int i;
1305 /* update pdp_prep to the current pdp_st. */
1306 double pre_unknown = 0.0;
1307 unival *scratch = rrd->pdp_prep[ds_idx].scratch;
1308 unsigned long mrhb = rrd->ds_def[ds_idx].par[DS_mrhb_cnt].u_cnt;
1310 rpnstack_t rpnstack; /* used for COMPUTE DS */
1312 rpnstack_init(&rpnstack);
1315 if (isnan(pdp_new[ds_idx])) {
1316 /* a final bit of unknown to be added before calculation
1317 we use a temporary variable for this so that we
1318 don't have to turn integer lines before using the value */
1319 pre_unknown = pre_int;
1320 } else {
1321 if (isnan(scratch[PDP_val].u_val)) {
1322 scratch[PDP_val].u_val = 0;
1323 }
1324 scratch[PDP_val].u_val += pdp_new[ds_idx] / interval * pre_int;
1325 }
1327 /* if too much of the pdp_prep is unknown we dump it */
1328 /* if the interval is larger thatn mrhb we get NAN */
1329 if ((interval > mrhb) ||
1330 (rrd->stat_head->pdp_step / 2.0 <
1331 (signed) scratch[PDP_unkn_sec_cnt].u_cnt)) {
1332 pdp_temp[ds_idx] = DNAN;
1333 } else {
1334 pdp_temp[ds_idx] = scratch[PDP_val].u_val /
1335 ((double) (diff_pdp_st - scratch[PDP_unkn_sec_cnt].u_cnt) -
1336 pre_unknown);
1337 }
1339 /* process CDEF data sources; remember each CDEF DS can
1340 * only reference other DS with a lower index number */
1341 if (dst_conv(rrd->ds_def[ds_idx].dst) == DST_CDEF) {
1342 rpnp_t *rpnp;
1344 rpnp =
1345 rpn_expand((rpn_cdefds_t *) &(rrd->ds_def[ds_idx].par[DS_cdef]));
1346 /* substitute data values for OP_VARIABLE nodes */
1347 for (i = 0; rpnp[i].op != OP_END; i++) {
1348 if (rpnp[i].op == OP_VARIABLE) {
1349 rpnp[i].op = OP_NUMBER;
1350 rpnp[i].val = pdp_temp[rpnp[i].ptr];
1351 }
1352 }
1353 /* run the rpn calculator */
1354 if (rpn_calc(rpnp, &rpnstack, 0, pdp_temp, ds_idx) == -1) {
1355 free(rpnp);
1356 rpnstack_free(&rpnstack);
1357 return -1;
1358 }
1359 }
1361 /* make pdp_prep ready for the next run */
1362 if (isnan(pdp_new[ds_idx])) {
1363 /* this is not realy accurate if we use subsecond data arival time
1364 should have thought of it when going subsecond resolution ...
1365 sorry next format change we will have it! */
1366 scratch[PDP_unkn_sec_cnt].u_cnt = floor(post_int);
1367 scratch[PDP_val].u_val = DNAN;
1368 } else {
1369 scratch[PDP_unkn_sec_cnt].u_cnt = 0;
1370 scratch[PDP_val].u_val = pdp_new[ds_idx] / interval * post_int;
1371 }
1372 rpnstack_free(&rpnstack);
1373 return 0;
1374 }
1376 /*
1377 * Iterate over all the RRAs for a given DS and:
1378 * 1. Decide whether to schedule a smooth later
1379 * 2. Decide whether to skip updating SEASONAL and DEVSEASONAL
1380 * 3. Update the CDP
1381 *
1382 * Returns 0 on success, -1 on error
1383 */
1384 static int update_all_cdp_prep(
1385 rrd_t *rrd,
1386 unsigned long *rra_step_cnt,
1387 unsigned long rra_begin,
1388 rrd_file_t *rrd_file,
1389 unsigned long elapsed_pdp_st,
1390 unsigned long proc_pdp_cnt,
1391 rrd_value_t **last_seasonal_coef,
1392 rrd_value_t **seasonal_coef,
1393 rrd_value_t *pdp_temp,
1394 unsigned long *skip_update,
1395 int *schedule_smooth)
1396 {
1397 unsigned long rra_idx;
1399 /* index into the CDP scratch array */
1400 enum cf_en current_cf;
1401 unsigned long rra_start;
1403 /* number of rows to be updated in an RRA for a data value. */
1404 unsigned long start_pdp_offset;
1406 rra_start = rra_begin;
1407 for (rra_idx = 0; rra_idx < rrd->stat_head->rra_cnt; rra_idx++) {
1408 current_cf = cf_conv(rrd->rra_def[rra_idx].cf_nam);
1409 start_pdp_offset =
1410 rrd->rra_def[rra_idx].pdp_cnt -
1411 proc_pdp_cnt % rrd->rra_def[rra_idx].pdp_cnt;
1412 skip_update[rra_idx] = 0;
1413 if (start_pdp_offset <= elapsed_pdp_st) {
1414 rra_step_cnt[rra_idx] = (elapsed_pdp_st - start_pdp_offset) /
1415 rrd->rra_def[rra_idx].pdp_cnt + 1;
1416 } else {
1417 rra_step_cnt[rra_idx] = 0;
1418 }
1420 if (current_cf == CF_SEASONAL || current_cf == CF_DEVSEASONAL) {
1421 /* If this is a bulk update, we need to skip ahead in the seasonal arrays
1422 * so that they will be correct for the next observed value; note that for
1423 * the bulk update itself, no update will occur to DEVSEASONAL or SEASONAL;
1424 * futhermore, HWPREDICT and DEVPREDICT will be set to DNAN. */
1425 if (rra_step_cnt[rra_idx] > 1) {
1426 skip_update[rra_idx] = 1;
1427 lookup_seasonal(rrd, rra_idx, rra_start, rrd_file,
1428 elapsed_pdp_st, last_seasonal_coef);
1429 lookup_seasonal(rrd, rra_idx, rra_start, rrd_file,
1430 elapsed_pdp_st + 1, seasonal_coef);
1431 }
1432 /* periodically run a smoother for seasonal effects */
1433 if (do_schedule_smooth(rrd, rra_idx, elapsed_pdp_st)) {
1434 #ifdef DEBUG
1435 fprintf(stderr,
1436 "schedule_smooth: cur_row %lu, elapsed_pdp_st %lu, smooth idx %lu\n",
1437 rrd->rra_ptr[rra_idx].cur_row, elapsed_pdp_st,
1438 rrd->rra_def[rra_idx].par[RRA_seasonal_smooth_idx].
1439 u_cnt);
1440 #endif
1441 *schedule_smooth = 1;
1442 }
1443 }
1444 if (rrd_test_error())
1445 return -1;
1447 if (update_cdp_prep
1448 (rrd, elapsed_pdp_st, start_pdp_offset, rra_step_cnt, rra_idx,
1449 pdp_temp, *last_seasonal_coef, *seasonal_coef,
1450 current_cf) == -1) {
1451 return -1;
1452 }
1453 rra_start +=
1454 rrd->rra_def[rra_idx].row_cnt * rrd->stat_head->ds_cnt *
1455 sizeof(rrd_value_t);
1456 }
1457 return 0;
1458 }
1460 /*
1461 * Are we due for a smooth? Also increments our position in the burn-in cycle.
1462 */
1463 static int do_schedule_smooth(
1464 rrd_t *rrd,
1465 unsigned long rra_idx,
1466 unsigned long elapsed_pdp_st)
1467 {
1468 unsigned long cdp_idx = rra_idx * (rrd->stat_head->ds_cnt);
1469 unsigned long cur_row = rrd->rra_ptr[rra_idx].cur_row;
1470 unsigned long row_cnt = rrd->rra_def[rra_idx].row_cnt;
1471 unsigned long seasonal_smooth_idx =
1472 rrd->rra_def[rra_idx].par[RRA_seasonal_smooth_idx].u_cnt;
1473 unsigned long *init_seasonal =
1474 &(rrd->cdp_prep[cdp_idx].scratch[CDP_init_seasonal].u_cnt);
1476 /* Need to use first cdp parameter buffer to track burnin (burnin requires
1477 * a specific smoothing schedule). The CDP_init_seasonal parameter is
1478 * really an RRA level, not a data source within RRA level parameter, but
1479 * the rra_def is read only for rrd_update (not flushed to disk). */
1480 if (*init_seasonal > BURNIN_CYCLES) {
1481 /* someone has no doubt invented a trick to deal with this wrap around,
1482 * but at least this code is clear. */
1483 if (seasonal_smooth_idx > cur_row) {
1484 /* here elapsed_pdp_st = rra_step_cnt[rra_idx] because of 1-1 mapping
1485 * between PDP and CDP */
1486 return (cur_row + elapsed_pdp_st >= seasonal_smooth_idx);
1487 }
1488 /* can't rely on negative numbers because we are working with
1489 * unsigned values */
1490 return (cur_row + elapsed_pdp_st >= row_cnt
1491 && cur_row + elapsed_pdp_st >= row_cnt + seasonal_smooth_idx);
1492 }
1493 /* mark off one of the burn-in cycles */
1494 return (cur_row + elapsed_pdp_st >= row_cnt && ++(*init_seasonal));
1495 }
1497 /*
1498 * For a given RRA, iterate over the data sources and call the appropriate
1499 * consolidation function.
1500 *
1501 * Returns 0 on success, -1 on error.
1502 */
1503 static int update_cdp_prep(
1504 rrd_t *rrd,
1505 unsigned long elapsed_pdp_st,
1506 unsigned long start_pdp_offset,
1507 unsigned long *rra_step_cnt,
1508 int rra_idx,
1509 rrd_value_t *pdp_temp,
1510 rrd_value_t *last_seasonal_coef,
1511 rrd_value_t *seasonal_coef,
1512 int current_cf)
1513 {
1514 unsigned long ds_idx, cdp_idx;
1516 /* update CDP_PREP areas */
1517 /* loop over data soures within each RRA */
1518 for (ds_idx = 0; ds_idx < rrd->stat_head->ds_cnt; ds_idx++) {
1520 cdp_idx = rra_idx * rrd->stat_head->ds_cnt + ds_idx;
1522 if (rrd->rra_def[rra_idx].pdp_cnt > 1) {
1523 update_cdp(rrd->cdp_prep[cdp_idx].scratch, current_cf,
1524 pdp_temp[ds_idx], rra_step_cnt[rra_idx],
1525 elapsed_pdp_st, start_pdp_offset,
1526 rrd->rra_def[rra_idx].pdp_cnt,
1527 rrd->rra_def[rra_idx].par[RRA_cdp_xff_val].u_val,
1528 rra_idx, ds_idx);
1529 } else {
1530 /* Nothing to consolidate if there's one PDP per CDP. However, if
1531 * we've missed some PDPs, let's update null counters etc. */
1532 if (elapsed_pdp_st > 2) {
1533 reset_cdp(rrd, elapsed_pdp_st, pdp_temp, last_seasonal_coef,
1534 seasonal_coef, rra_idx, ds_idx, cdp_idx,
1535 current_cf);
1536 }
1537 }
1539 if (rrd_test_error())
1540 return -1;
1541 } /* endif data sources loop */
1542 return 0;
1543 }
1545 /*
1546 * Given the new reading (pdp_temp_val), update or initialize the CDP value,
1547 * primary value, secondary value, and # of unknowns.
1548 */
1549 static void update_cdp(
1550 unival *scratch,
1551 int current_cf,
1552 rrd_value_t pdp_temp_val,
1553 unsigned long rra_step_cnt,
1554 unsigned long elapsed_pdp_st,
1555 unsigned long start_pdp_offset,
1556 unsigned long pdp_cnt,
1557 rrd_value_t xff,
1558 int i,
1559 int ii)
1560 {
1561 /* shorthand variables */
1562 rrd_value_t *cdp_val = &scratch[CDP_val].u_val;
1563 rrd_value_t *cdp_primary_val = &scratch[CDP_primary_val].u_val;
1564 rrd_value_t *cdp_secondary_val = &scratch[CDP_secondary_val].u_val;
1565 unsigned long *cdp_unkn_pdp_cnt = &scratch[CDP_unkn_pdp_cnt].u_cnt;
1567 if (rra_step_cnt) {
1568 /* If we are in this block, as least 1 CDP value will be written to
1569 * disk, this is the CDP_primary_val entry. If more than 1 value needs
1570 * to be written, then the "fill in" value is the CDP_secondary_val
1571 * entry. */
1572 if (isnan(pdp_temp_val)) {
1573 *cdp_unkn_pdp_cnt += start_pdp_offset;
1574 *cdp_secondary_val = DNAN;
1575 } else {
1576 /* CDP_secondary value is the RRA "fill in" value for intermediary
1577 * CDP data entries. No matter the CF, the value is the same because
1578 * the average, max, min, and last of a list of identical values is
1579 * the same, namely, the value itself. */
1580 *cdp_secondary_val = pdp_temp_val;
1581 }
1583 if (*cdp_unkn_pdp_cnt > pdp_cnt * xff) {
1584 *cdp_primary_val = DNAN;
1585 if (current_cf == CF_AVERAGE) {
1586 *cdp_val =
1587 initialize_average_carry_over(pdp_temp_val,
1588 elapsed_pdp_st,
1589 start_pdp_offset, pdp_cnt);
1590 } else {
1591 *cdp_val = pdp_temp_val;
1592 }
1593 } else {
1594 initialize_cdp_val(scratch, current_cf, pdp_temp_val,
1595 elapsed_pdp_st, start_pdp_offset, pdp_cnt);
1596 } /* endif meets xff value requirement for a valid value */
1597 /* initialize carry over CDP_unkn_pdp_cnt, this must after CDP_primary_val
1598 * is set because CDP_unkn_pdp_cnt is required to compute that value. */
1599 if (isnan(pdp_temp_val))
1600 *cdp_unkn_pdp_cnt = (elapsed_pdp_st - start_pdp_offset) % pdp_cnt;
1601 else
1602 *cdp_unkn_pdp_cnt = 0;
1603 } else { /* rra_step_cnt[i] == 0 */
1605 #ifdef DEBUG
1606 if (isnan(*cdp_val)) {
1607 fprintf(stderr, "schedule CDP_val update, RRA %d DS %d, DNAN\n",
1608 i, ii);
1609 } else {
1610 fprintf(stderr, "schedule CDP_val update, RRA %d DS %d, %10.2f\n",
1611 i, ii, *cdp_val);
1612 }
1613 #endif
1614 if (isnan(pdp_temp_val)) {
1615 *cdp_unkn_pdp_cnt += elapsed_pdp_st;
1616 } else {
1617 *cdp_val =
1618 calculate_cdp_val(*cdp_val, pdp_temp_val, elapsed_pdp_st,
1619 current_cf, i, ii);
1620 }
1621 }
1622 }
1624 /*
1625 * Set the CDP_primary_val and CDP_val to the appropriate initial value based
1626 * on the type of consolidation function.
1627 */
1628 static void initialize_cdp_val(
1629 unival *scratch,
1630 int current_cf,
1631 rrd_value_t pdp_temp_val,
1632 unsigned long elapsed_pdp_st,
1633 unsigned long start_pdp_offset,
1634 unsigned long pdp_cnt)
1635 {
1636 rrd_value_t cum_val, cur_val;
1638 switch (current_cf) {
1639 case CF_AVERAGE:
1640 cum_val = IFDNAN(scratch[CDP_val].u_val, 0.0);
1641 cur_val = IFDNAN(pdp_temp_val, 0.0);
1642 scratch[CDP_primary_val].u_val =
1643 (cum_val + cur_val * start_pdp_offset) /
1644 (pdp_cnt - scratch[CDP_unkn_pdp_cnt].u_cnt);
1645 scratch[CDP_val].u_val =
1646 initialize_average_carry_over(pdp_temp_val, elapsed_pdp_st,
1647 start_pdp_offset, pdp_cnt);
1648 break;
1649 case CF_MAXIMUM:
1650 cum_val = IFDNAN(scratch[CDP_val].u_val, -DINF);
1651 cur_val = IFDNAN(pdp_temp_val, -DINF);
1652 #if 0
1653 #ifdef DEBUG
1654 if (isnan(scratch[CDP_val].u_val) && isnan(pdp_temp)) {
1655 fprintf(stderr,
1656 "RRA %lu, DS %lu, both CDP_val and pdp_temp are DNAN!",
1657 i, ii);
1658 exit(-1);
1659 }
1660 #endif
1661 #endif
1662 if (cur_val > cum_val)
1663 scratch[CDP_primary_val].u_val = cur_val;
1664 else
1665 scratch[CDP_primary_val].u_val = cum_val;
1666 /* initialize carry over value */
1667 scratch[CDP_val].u_val = pdp_temp_val;
1668 break;
1669 case CF_MINIMUM:
1670 cum_val = IFDNAN(scratch[CDP_val].u_val, DINF);
1671 cur_val = IFDNAN(pdp_temp_val, DINF);
1672 #if 0
1673 #ifdef DEBUG
1674 if (isnan(scratch[CDP_val].u_val) && isnan(pdp_temp)) {
1675 fprintf(stderr,
1676 "RRA %lu, DS %lu, both CDP_val and pdp_temp are DNAN!", i,
1677 ii);
1678 exit(-1);
1679 }
1680 #endif
1681 #endif
1682 if (cur_val < cum_val)
1683 scratch[CDP_primary_val].u_val = cur_val;
1684 else
1685 scratch[CDP_primary_val].u_val = cum_val;
1686 /* initialize carry over value */
1687 scratch[CDP_val].u_val = pdp_temp_val;
1688 break;
1689 case CF_LAST:
1690 default:
1691 scratch[CDP_primary_val].u_val = pdp_temp_val;
1692 /* initialize carry over value */
1693 scratch[CDP_val].u_val = pdp_temp_val;
1694 break;
1695 }
1696 }
1698 /*
1699 * Update the consolidation function for Holt-Winters functions as
1700 * well as other functions that don't actually consolidate multiple
1701 * PDPs.
1702 */
1703 static void reset_cdp(
1704 rrd_t *rrd,
1705 unsigned long elapsed_pdp_st,
1706 rrd_value_t *pdp_temp,
1707 rrd_value_t *last_seasonal_coef,
1708 rrd_value_t *seasonal_coef,
1709 int rra_idx,
1710 int ds_idx,
1711 int cdp_idx,
1712 enum cf_en current_cf)
1713 {
1714 unival *scratch = rrd->cdp_prep[cdp_idx].scratch;
1716 switch (current_cf) {
1717 case CF_AVERAGE:
1718 default:
1719 scratch[CDP_primary_val].u_val = pdp_temp[ds_idx];
1720 scratch[CDP_secondary_val].u_val = pdp_temp[ds_idx];
1721 break;
1722 case CF_SEASONAL:
1723 case CF_DEVSEASONAL:
1724 /* need to update cached seasonal values, so they are consistent
1725 * with the bulk update */
1726 /* WARNING: code relies on the fact that CDP_hw_last_seasonal and
1727 * CDP_last_deviation are the same. */
1728 scratch[CDP_hw_last_seasonal].u_val = last_seasonal_coef[ds_idx];
1729 scratch[CDP_hw_seasonal].u_val = seasonal_coef[ds_idx];
1730 break;
1731 case CF_HWPREDICT:
1732 case CF_MHWPREDICT:
1733 /* need to update the null_count and last_null_count.
1734 * even do this for non-DNAN pdp_temp because the
1735 * algorithm is not learning from batch updates. */
1736 scratch[CDP_null_count].u_cnt += elapsed_pdp_st;
1737 scratch[CDP_last_null_count].u_cnt += elapsed_pdp_st - 1;
1738 /* fall through */
1739 case CF_DEVPREDICT:
1740 scratch[CDP_primary_val].u_val = DNAN;
1741 scratch[CDP_secondary_val].u_val = DNAN;
1742 break;
1743 case CF_FAILURES:
1744 /* do not count missed bulk values as failures */
1745 scratch[CDP_primary_val].u_val = 0;
1746 scratch[CDP_secondary_val].u_val = 0;
1747 /* need to reset violations buffer.
1748 * could do this more carefully, but for now, just
1749 * assume a bulk update wipes away all violations. */
1750 erase_violations(rrd, cdp_idx, rra_idx);
1751 break;
1752 }
1753 }
1755 static rrd_value_t initialize_average_carry_over(
1756 rrd_value_t pdp_temp_val,
1757 unsigned long elapsed_pdp_st,
1758 unsigned long start_pdp_offset,
1759 unsigned long pdp_cnt)
1760 {
1761 /* initialize carry over value */
1762 if (isnan(pdp_temp_val)) {
1763 return DNAN;
1764 }
1765 return pdp_temp_val * ((elapsed_pdp_st - start_pdp_offset) % pdp_cnt);
1766 }
1768 /*
1769 * Update or initialize a CDP value based on the consolidation
1770 * function.
1771 *
1772 * Returns the new value.
1773 */
1774 static rrd_value_t calculate_cdp_val(
1775 rrd_value_t cdp_val,
1776 rrd_value_t pdp_temp_val,
1777 unsigned long elapsed_pdp_st,
1778 int current_cf,
1779 #ifdef DEBUG
1780 int i,
1781 int ii
1782 #else
1783 int UNUSED(i),
1784 int UNUSED(ii)
1785 #endif
1786 )
1787 {
1788 if (isnan(cdp_val)) {
1789 if (current_cf == CF_AVERAGE) {
1790 pdp_temp_val *= elapsed_pdp_st;
1791 }
1792 #ifdef DEBUG
1793 fprintf(stderr, "Initialize CDP_val for RRA %d DS %d: %10.2f\n",
1794 i, ii, pdp_temp_val);
1795 #endif
1796 return pdp_temp_val;
1797 }
1798 if (current_cf == CF_AVERAGE)
1799 return cdp_val + pdp_temp_val * elapsed_pdp_st;
1800 if (current_cf == CF_MINIMUM)
1801 return (pdp_temp_val < cdp_val) ? pdp_temp_val : cdp_val;
1802 if (current_cf == CF_MAXIMUM)
1803 return (pdp_temp_val > cdp_val) ? pdp_temp_val : cdp_val;
1805 return pdp_temp_val;
1806 }
1808 /*
1809 * For each RRA, update the seasonal values and then call update_aberrant_CF
1810 * for each data source.
1811 *
1812 * Return 0 on success, -1 on error.
1813 */
1814 static int update_aberrant_cdps(
1815 rrd_t *rrd,
1816 rrd_file_t *rrd_file,
1817 unsigned long rra_begin,
1818 unsigned long elapsed_pdp_st,
1819 rrd_value_t *pdp_temp,
1820 rrd_value_t **seasonal_coef)
1821 {
1822 unsigned long rra_idx, ds_idx, j;
1824 /* number of PDP steps since the last update that
1825 * are assigned to the first CDP to be generated
1826 * since the last update. */
1827 unsigned short scratch_idx;
1828 unsigned long rra_start;
1829 enum cf_en current_cf;
1831 /* this loop is only entered if elapsed_pdp_st < 3 */
1832 for (j = elapsed_pdp_st, scratch_idx = CDP_primary_val;
1833 j > 0 && j < 3; j--, scratch_idx = CDP_secondary_val) {
1834 rra_start = rra_begin;
1835 for (rra_idx = 0; rra_idx < rrd->stat_head->rra_cnt; rra_idx++) {
1836 if (rrd->rra_def[rra_idx].pdp_cnt == 1) {
1837 current_cf = cf_conv(rrd->rra_def[rra_idx].cf_nam);
1838 if (current_cf == CF_SEASONAL || current_cf == CF_DEVSEASONAL) {
1839 if (scratch_idx == CDP_primary_val) {
1840 lookup_seasonal(rrd, rra_idx, rra_start, rrd_file,
1841 elapsed_pdp_st + 1, seasonal_coef);
1842 } else {
1843 lookup_seasonal(rrd, rra_idx, rra_start, rrd_file,
1844 elapsed_pdp_st + 2, seasonal_coef);
1845 }
1846 }
1847 if (rrd_test_error())
1848 return -1;
1849 /* loop over data soures within each RRA */
1850 for (ds_idx = 0; ds_idx < rrd->stat_head->ds_cnt; ds_idx++) {
1851 update_aberrant_CF(rrd, pdp_temp[ds_idx], current_cf,
1852 rra_idx * (rrd->stat_head->ds_cnt) +
1853 ds_idx, rra_idx, ds_idx, scratch_idx,
1854 *seasonal_coef);
1855 }
1856 }
1857 rra_start += rrd->rra_def[rra_idx].row_cnt
1858 * rrd->stat_head->ds_cnt * sizeof(rrd_value_t);
1859 }
1860 }
1861 return 0;
1862 }
1864 /*
1865 * Move sequentially through the file, writing one RRA at a time. Note this
1866 * architecture divorces the computation of CDP with flushing updated RRA
1867 * entries to disk.
1868 *
1869 * Return 0 on success, -1 on error.
1870 */
1871 static int write_to_rras(
1872 rrd_t *rrd,
1873 rrd_file_t *rrd_file,
1874 unsigned long *rra_step_cnt,
1875 unsigned long rra_begin,
1876 time_t current_time,
1877 unsigned long *skip_update,
1878 rrd_info_t ** pcdp_summary)
1879 {
1880 unsigned long rra_idx;
1881 unsigned long rra_start;
1882 time_t rra_time = 0; /* time of update for a RRA */
1884 unsigned long ds_cnt = rrd->stat_head->ds_cnt;
1886 /* Ready to write to disk */
1887 rra_start = rra_begin;
1889 for (rra_idx = 0; rra_idx < rrd->stat_head->rra_cnt; rra_idx++) {
1890 rra_def_t *rra_def = &rrd->rra_def[rra_idx];
1891 rra_ptr_t *rra_ptr = &rrd->rra_ptr[rra_idx];
1893 /* for cdp_prep */
1894 unsigned short scratch_idx;
1895 unsigned long step_subtract;
1897 for (scratch_idx = CDP_primary_val,
1898 step_subtract = 1;
1899 rra_step_cnt[rra_idx] > 0;
1900 rra_step_cnt[rra_idx]--,
1901 scratch_idx = CDP_secondary_val,
1902 step_subtract = 2) {
1904 size_t rra_pos_new;
1905 #ifdef DEBUG
1906 fprintf(stderr, " -- RRA Preseek %ld\n", rrd_file->pos);
1907 #endif
1908 /* increment, with wrap-around */
1909 if (++rra_ptr->cur_row >= rra_def->row_cnt)
1910 rra_ptr->cur_row = 0;
1912 /* we know what our position should be */
1913 rra_pos_new = rra_start
1914 + ds_cnt * rra_ptr->cur_row * sizeof(rrd_value_t);
1916 /* re-seek if the position is wrong or we wrapped around */
1917 if ((size_t)rra_pos_new != rrd_file->pos) {
1918 if (rrd_seek(rrd_file, rra_pos_new, SEEK_SET) != 0) {
1919 rrd_set_error("seek error in rrd");
1920 return -1;
1921 }
1922 }
1923 #ifdef DEBUG
1924 fprintf(stderr, " -- RRA Postseek %ld\n", rrd_file->pos);
1925 #endif
1927 if (skip_update[rra_idx])
1928 continue;
1930 if (*pcdp_summary != NULL) {
1931 unsigned long step_time = rra_def->pdp_cnt * rrd->stat_head->pdp_step;
1933 rra_time = (current_time - current_time % step_time)
1934 - ((rra_step_cnt[rra_idx] - step_subtract) * step_time);
1935 }
1937 if (write_RRA_row
1938 (rrd_file, rrd, rra_idx, scratch_idx,
1939 pcdp_summary, rra_time) == -1)
1940 return -1;
1942 rrd_notify_row(rrd_file, rra_idx, rra_pos_new, rra_time);
1943 }
1945 rra_start += rra_def->row_cnt * ds_cnt * sizeof(rrd_value_t);
1946 } /* RRA LOOP */
1948 return 0;
1949 }
1951 /*
1952 * Write out one row of values (one value per DS) to the archive.
1953 *
1954 * Returns 0 on success, -1 on error.
1955 */
1956 static int write_RRA_row(
1957 rrd_file_t *rrd_file,
1958 rrd_t *rrd,
1959 unsigned long rra_idx,
1960 unsigned short CDP_scratch_idx,
1961 rrd_info_t ** pcdp_summary,
1962 time_t rra_time)
1963 {
1964 unsigned long ds_idx, cdp_idx;
1965 rrd_infoval_t iv;
1967 for (ds_idx = 0; ds_idx < rrd->stat_head->ds_cnt; ds_idx++) {
1968 /* compute the cdp index */
1969 cdp_idx = rra_idx * (rrd->stat_head->ds_cnt) + ds_idx;
1970 #ifdef DEBUG
1971 fprintf(stderr, " -- RRA WRITE VALUE %e, at %ld CF:%s\n",
1972 rrd->cdp_prep[cdp_idx].scratch[CDP_scratch_idx].u_val,
1973 rrd_file->pos, rrd->rra_def[rra_idx].cf_nam);
1974 #endif
1975 if (*pcdp_summary != NULL) {
1976 iv.u_val = rrd->cdp_prep[cdp_idx].scratch[CDP_scratch_idx].u_val;
1977 /* append info to the return hash */
1978 *pcdp_summary = rrd_info_push(*pcdp_summary,
1979 sprintf_alloc
1980 ("[%lli]RRA[%s][%lu]DS[%s]",
1981 (long long)rra_time,
1982 rrd->rra_def[rra_idx].cf_nam,
1983 rrd->rra_def[rra_idx].pdp_cnt,
1984 rrd->ds_def[ds_idx].ds_nam),
1985 RD_I_VAL, iv);
1986 }
1987 errno = 0;
1988 if (rrd_write(rrd_file,
1989 &(rrd->cdp_prep[cdp_idx].scratch[CDP_scratch_idx].
1990 u_val), sizeof(rrd_value_t)) != sizeof(rrd_value_t)) {
1991 rrd_set_error("writing rrd: %s", rrd_strerror(errno));
1992 return -1;
1993 }
1994 }
1995 return 0;
1996 }
1998 /*
1999 * Call apply_smoother for all DEVSEASONAL and SEASONAL RRAs.
2000 *
2001 * Returns 0 on success, -1 otherwise
2002 */
2003 static int smooth_all_rras(
2004 rrd_t *rrd,
2005 rrd_file_t *rrd_file,
2006 unsigned long rra_begin)
2007 {
2008 unsigned long rra_start = rra_begin;
2009 unsigned long rra_idx;
2011 for (rra_idx = 0; rra_idx < rrd->stat_head->rra_cnt; ++rra_idx) {
2012 if (cf_conv(rrd->rra_def[rra_idx].cf_nam) == CF_DEVSEASONAL ||
2013 cf_conv(rrd->rra_def[rra_idx].cf_nam) == CF_SEASONAL) {
2014 #ifdef DEBUG
2015 fprintf(stderr, "Running smoother for rra %lu\n", rra_idx);
2016 #endif
2017 apply_smoother(rrd, rra_idx, rra_start, rrd_file);
2018 if (rrd_test_error())
2019 return -1;
2020 }
2021 rra_start += rrd->rra_def[rra_idx].row_cnt
2022 * rrd->stat_head->ds_cnt * sizeof(rrd_value_t);
2023 }
2024 return 0;
2025 }
2027 #ifndef HAVE_MMAP
2028 /*
2029 * Flush changes to disk (unless we're using mmap)
2030 *
2031 * Returns 0 on success, -1 otherwise
2032 */
2033 static int write_changes_to_disk(
2034 rrd_t *rrd,
2035 rrd_file_t *rrd_file,
2036 int version)
2037 {
2038 /* we just need to write back the live header portion now */
2039 if (rrd_seek(rrd_file, (sizeof(stat_head_t)
2040 + sizeof(ds_def_t) * rrd->stat_head->ds_cnt
2041 + sizeof(rra_def_t) * rrd->stat_head->rra_cnt),
2042 SEEK_SET) != 0) {
2043 rrd_set_error("seek rrd for live header writeback");
2044 return -1;
2045 }
2046 if (version >= 3) {
2047 if (rrd_write(rrd_file, rrd->live_head,
2048 sizeof(live_head_t) * 1) != sizeof(live_head_t) * 1) {
2049 rrd_set_error("rrd_write live_head to rrd");
2050 return -1;
2051 }
2052 } else {
2053 if (rrd_write(rrd_file, rrd->legacy_last_up,
2054 sizeof(time_t) * 1) != sizeof(time_t) * 1) {
2055 rrd_set_error("rrd_write live_head to rrd");
2056 return -1;
2057 }
2058 }
2061 if (rrd_write(rrd_file, rrd->pdp_prep,
2062 sizeof(pdp_prep_t) * rrd->stat_head->ds_cnt)
2063 != (ssize_t) (sizeof(pdp_prep_t) * rrd->stat_head->ds_cnt)) {
2064 rrd_set_error("rrd_write pdp_prep to rrd");
2065 return -1;
2066 }
2068 if (rrd_write(rrd_file, rrd->cdp_prep,
2069 sizeof(cdp_prep_t) * rrd->stat_head->rra_cnt *
2070 rrd->stat_head->ds_cnt)
2071 != (ssize_t) (sizeof(cdp_prep_t) * rrd->stat_head->rra_cnt *
2072 rrd->stat_head->ds_cnt)) {
2074 rrd_set_error("rrd_write cdp_prep to rrd");
2075 return -1;
2076 }
2078 if (rrd_write(rrd_file, rrd->rra_ptr,
2079 sizeof(rra_ptr_t) * rrd->stat_head->rra_cnt)
2080 != (ssize_t) (sizeof(rra_ptr_t) * rrd->stat_head->rra_cnt)) {
2081 rrd_set_error("rrd_write rra_ptr to rrd");
2082 return -1;
2083 }
2084 return 0;
2085 }
2086 #endif