2 * collectd - src/rrdtool.c
3 * Copyright (C) 2006-2008 Florian octo Forster
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Florian octo Forster <octo at verplant.org>
25 #include "utils_avltree.h"
49 typedef struct rrd_cache_s rrd_cache_t;
56 typedef enum rrd_queue_dir_e rrd_queue_dir_t;
61 struct rrd_queue_s *next;
63 typedef struct rrd_queue_s rrd_queue_t;
68 static int rra_timespans[] =
76 static int rra_timespans_num = STATIC_ARRAY_SIZE (rra_timespans);
78 static int *rra_timespans_custom = NULL;
79 static int rra_timespans_custom_num = 0;
81 static char *rra_types[] =
87 static int rra_types_num = STATIC_ARRAY_SIZE (rra_types);
89 static const char *config_keys[] =
101 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
103 /* If datadir is zero, the daemon's basedir is used. If stepsize or heartbeat
104 * is zero a default, depending on the `interval' member of the value list is
106 static char *datadir = NULL;
107 static int stepsize = 0;
108 static int heartbeat = 0;
109 static int rrarows = 1200;
110 static double xff = 0.1;
111 static double write_rate = 0.0;
113 /* XXX: If you need to lock both, cache_lock and queue_lock, at the same time,
114 * ALWAYS lock `cache_lock' first! */
115 static int cache_timeout = 0;
116 static int cache_flush_timeout = 0;
117 static time_t cache_flush_last;
118 static c_avl_tree_t *cache = NULL;
119 static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
121 static rrd_queue_t *queue_head = NULL;
122 static rrd_queue_t *queue_tail = NULL;
123 static rrd_queue_t *flushq_head = NULL;
124 static rrd_queue_t *flushq_tail = NULL;
125 static pthread_t queue_thread = 0;
126 static pthread_mutex_t queue_lock = PTHREAD_MUTEX_INITIALIZER;
127 static pthread_cond_t queue_cond = PTHREAD_COND_INITIALIZER;
129 #if !HAVE_THREADSAFE_LIBRRD
130 static pthread_mutex_t librrd_lock = PTHREAD_MUTEX_INITIALIZER;
133 static int do_shutdown = 0;
139 static void rra_free (int rra_num, char **rra_def)
143 for (i = 0; i < rra_num; i++)
148 } /* void rra_free */
150 static int rra_get (char ***ret, const value_list_t *vl)
168 /* The stepsize we use here: If it is user-set, use it. If not, use the
169 * interval of the value-list. */
178 ss = (stepsize > 0) ? stepsize : vl->interval;
185 /* Use the configured timespans or fall back to the built-in defaults */
186 if (rra_timespans_custom_num != 0)
188 rts = rra_timespans_custom;
189 rts_num = rra_timespans_custom_num;
194 rts_num = rra_timespans_num;
197 rra_max = rts_num * rra_types_num;
199 if ((rra_def = (char **) malloc ((rra_max + 1) * sizeof (char *))) == NULL)
201 memset (rra_def, '\0', (rra_max + 1) * sizeof (char *));
205 for (i = 0; i < rts_num; i++)
209 if ((span / ss) < rrarows)
215 cdp_len = (int) floor (((double) span)
216 / ((double) (rrarows * ss)));
218 cdp_num = (int) ceil (((double) span)
219 / ((double) (cdp_len * ss)));
221 for (j = 0; j < rra_types_num; j++)
223 if (rra_num >= rra_max)
226 if (ssnprintf (buffer, sizeof (buffer), "RRA:%s:%3.1f:%u:%u",
228 cdp_len, cdp_num) >= sizeof (buffer))
230 ERROR ("rra_get: Buffer would have been truncated.");
234 rra_def[rra_num++] = sstrdup (buffer);
239 DEBUG ("rra_num = %i", rra_num);
240 for (i = 0; i < rra_num; i++)
241 DEBUG (" %s", rra_def[i]);
248 static void ds_free (int ds_num, char **ds_def)
252 for (i = 0; i < ds_num; i++)
253 if (ds_def[i] != NULL)
258 static int ds_get (char ***ret, const data_set_t *ds, const value_list_t *vl)
267 DEBUG ("ds->ds_num = %i", ds->ds_num);
269 ds_def = (char **) malloc (ds->ds_num * sizeof (char *));
273 ERROR ("rrdtool plugin: malloc failed: %s",
274 sstrerror (errno, errbuf, sizeof (errbuf)));
277 memset (ds_def, '\0', ds->ds_num * sizeof (char *));
279 for (ds_num = 0; ds_num < ds->ds_num; ds_num++)
281 data_source_t *d = ds->ds + ds_num;
285 ds_def[ds_num] = NULL;
287 if (d->type == DS_TYPE_COUNTER)
289 else if (d->type == DS_TYPE_GAUGE)
293 ERROR ("rrdtool plugin: Unknown DS type: %i",
300 sstrncpy (min, "U", sizeof (min));
303 ssnprintf (min, sizeof (min), "%lf", d->min);
307 sstrncpy (max, "U", sizeof (max));
310 ssnprintf (max, sizeof (max), "%lf", d->max);
312 status = ssnprintf (buffer, sizeof (buffer),
315 (heartbeat > 0) ? heartbeat : (2 * vl->interval),
317 if ((status < 1) || (status >= sizeof (buffer)))
320 ds_def[ds_num] = sstrdup (buffer);
321 } /* for ds_num = 0 .. ds->ds_num */
326 DEBUG ("ds_num = %i", ds_num);
327 for (i = 0; i < ds_num; i++)
328 DEBUG (" %s", ds_def[i]);
332 if (ds_num != ds->ds_num)
334 ds_free (ds_num, ds_def);
342 #if HAVE_THREADSAFE_LIBRRD
343 static int srrd_create (char *filename, unsigned long pdp_step, time_t last_up,
344 int argc, const char **argv)
348 optind = 0; /* bug in librrd? */
351 status = rrd_create_r (filename, pdp_step, last_up, argc, (void *) argv);
355 WARNING ("rrdtool plugin: rrd_create_r (%s) failed: %s",
356 filename, rrd_get_error ());
360 } /* int srrd_create */
362 static int srrd_update (char *filename, char *template,
363 int argc, const char **argv)
367 optind = 0; /* bug in librrd? */
370 status = rrd_update_r (filename, template, argc, (void *) argv);
374 WARNING ("rrdtool plugin: rrd_update_r (%s) failed: %s",
375 filename, rrd_get_error ());
379 } /* int srrd_update */
380 /* #endif HAVE_THREADSAFE_LIBRRD */
382 #else /* !HAVE_THREADSAFE_LIBRRD */
383 static int srrd_create (char *filename, unsigned long pdp_step, time_t last_up,
384 int argc, const char **argv)
391 char pdp_step_str[16];
392 char last_up_str[16];
395 new_argv = (char **) malloc ((new_argc + 1) * sizeof (char *));
396 if (new_argv == NULL)
398 ERROR ("rrdtool plugin: malloc failed.");
403 last_up = time (NULL) - 10;
405 ssnprintf (pdp_step_str, sizeof (pdp_step_str), "%lu", pdp_step);
406 ssnprintf (last_up_str, sizeof (last_up_str), "%u", (unsigned int) last_up);
408 new_argv[0] = "create";
409 new_argv[1] = filename;
411 new_argv[3] = pdp_step_str;
413 new_argv[5] = last_up_str;
415 memcpy (new_argv + 6, argv, argc * sizeof (char *));
416 new_argv[new_argc] = NULL;
418 pthread_mutex_lock (&librrd_lock);
419 optind = 0; /* bug in librrd? */
422 status = rrd_create (new_argc, new_argv);
423 pthread_mutex_unlock (&librrd_lock);
427 WARNING ("rrdtool plugin: rrd_create (%s) failed: %s",
428 filename, rrd_get_error ());
434 } /* int srrd_create */
436 static int srrd_update (char *filename, char *template,
437 int argc, const char **argv)
444 assert (template == NULL);
447 new_argv = (char **) malloc ((new_argc + 1) * sizeof (char *));
448 if (new_argv == NULL)
450 ERROR ("rrdtool plugin: malloc failed.");
454 new_argv[0] = "update";
455 new_argv[1] = filename;
457 memcpy (new_argv + 2, argv, argc * sizeof (char *));
458 new_argv[new_argc] = NULL;
460 pthread_mutex_lock (&librrd_lock);
461 optind = 0; /* bug in librrd? */
464 status = rrd_update (new_argc, new_argv);
465 pthread_mutex_unlock (&librrd_lock);
469 WARNING ("rrdtool plugin: rrd_update_r failed: %s: %s",
470 argv[1], rrd_get_error ());
476 } /* int srrd_update */
477 #endif /* !HAVE_THREADSAFE_LIBRRD */
479 static int rrd_create_file (char *filename, const data_set_t *ds, const value_list_t *vl)
489 if (check_create_dir (filename))
492 if ((rra_num = rra_get (&rra_def, vl)) < 1)
494 ERROR ("rrd_create_file failed: Could not calculate RRAs");
498 if ((ds_num = ds_get (&ds_def, ds, vl)) < 1)
500 ERROR ("rrd_create_file failed: Could not calculate DSes");
504 argc = ds_num + rra_num;
506 if ((argv = (char **) malloc (sizeof (char *) * (argc + 1))) == NULL)
509 ERROR ("rrd_create failed: %s",
510 sstrerror (errno, errbuf, sizeof (errbuf)));
514 memcpy (argv, ds_def, ds_num * sizeof (char *));
515 memcpy (argv + ds_num, rra_def, rra_num * sizeof (char *));
516 argv[ds_num + rra_num] = NULL;
518 assert (vl->time > 10);
519 status = srrd_create (filename,
520 (stepsize > 0) ? stepsize : vl->interval,
522 argc, (const char **)argv);
525 ds_free (ds_num, ds_def);
526 rra_free (rra_num, rra_def);
531 static int value_list_to_string (char *buffer, int buffer_len,
532 const data_set_t *ds, const value_list_t *vl)
538 memset (buffer, '\0', buffer_len);
540 status = ssnprintf (buffer, buffer_len, "%u", (unsigned int) vl->time);
541 if ((status < 1) || (status >= buffer_len))
545 for (i = 0; i < ds->ds_num; i++)
547 if ((ds->ds[i].type != DS_TYPE_COUNTER)
548 && (ds->ds[i].type != DS_TYPE_GAUGE))
551 if (ds->ds[i].type == DS_TYPE_COUNTER)
552 status = ssnprintf (buffer + offset, buffer_len - offset,
553 ":%llu", vl->values[i].counter);
555 status = ssnprintf (buffer + offset, buffer_len - offset,
556 ":%lf", vl->values[i].gauge);
558 if ((status < 1) || (status >= (buffer_len - offset)))
562 } /* for ds->ds_num */
565 } /* int value_list_to_string */
567 static int value_list_to_filename (char *buffer, int buffer_len,
568 const data_set_t *ds, const value_list_t *vl)
575 status = ssnprintf (buffer + offset, buffer_len - offset,
577 if ((status < 1) || (status >= buffer_len - offset))
582 status = ssnprintf (buffer + offset, buffer_len - offset,
584 if ((status < 1) || (status >= buffer_len - offset))
588 if (strlen (vl->plugin_instance) > 0)
589 status = ssnprintf (buffer + offset, buffer_len - offset,
590 "%s-%s/", vl->plugin, vl->plugin_instance);
592 status = ssnprintf (buffer + offset, buffer_len - offset,
594 if ((status < 1) || (status >= buffer_len - offset))
598 if (strlen (vl->type_instance) > 0)
599 status = ssnprintf (buffer + offset, buffer_len - offset,
600 "%s-%s.rrd", vl->type, vl->type_instance);
602 status = ssnprintf (buffer + offset, buffer_len - offset,
604 if ((status < 1) || (status >= buffer_len - offset))
609 } /* int value_list_to_filename */
611 static void *rrd_queue_thread (void *data)
613 struct timeval tv_next_update;
614 struct timeval tv_now;
616 gettimeofday (&tv_next_update, /* timezone = */ NULL);
620 rrd_queue_t *queue_entry;
621 rrd_cache_t *cache_entry;
626 pthread_mutex_lock (&queue_lock);
627 /* Wait for values to arrive */
630 struct timespec ts_wait;
633 while ((flushq_head == NULL) && (queue_head == NULL)
634 && (do_shutdown == 0))
635 pthread_cond_wait (&queue_cond, &queue_lock);
637 if ((flushq_head == NULL) && (queue_head == NULL))
640 /* Don't delay if there's something to flush */
641 if (flushq_head != NULL)
644 /* Don't delay if we're shutting down */
645 if (do_shutdown != 0)
648 /* Don't delay if no delay was configured. */
649 if (write_rate <= 0.0)
652 gettimeofday (&tv_now, /* timezone = */ NULL);
653 status = timeval_sub_timespec (&tv_next_update, &tv_now,
655 /* We're good to go */
659 /* We're supposed to wait a bit with this update, so we'll
660 * wait for the next addition to the queue or to the end of
661 * the wait period - whichever comes first. */
662 ts_wait.tv_sec = tv_next_update.tv_sec;
663 ts_wait.tv_nsec = 1000 * tv_next_update.tv_usec;
665 status = pthread_cond_timedwait (&queue_cond, &queue_lock,
667 if (status == ETIMEDOUT)
671 /* XXX: If you need to lock both, cache_lock and queue_lock, at
672 * the same time, ALWAYS lock `cache_lock' first! */
674 /* We're in the shutdown phase */
675 if ((flushq_head == NULL) && (queue_head == NULL))
677 pthread_mutex_unlock (&queue_lock);
681 if (flushq_head != NULL)
683 /* Dequeue the first flush entry */
684 queue_entry = flushq_head;
685 if (flushq_head == flushq_tail)
686 flushq_head = flushq_tail = NULL;
688 flushq_head = flushq_head->next;
690 else /* if (queue_head != NULL) */
692 /* Dequeue the first regular entry */
693 queue_entry = queue_head;
694 if (queue_head == queue_tail)
695 queue_head = queue_tail = NULL;
697 queue_head = queue_head->next;
700 /* Unlock the queue again */
701 pthread_mutex_unlock (&queue_lock);
703 /* We now need the cache lock so the entry isn't updated while
704 * we make a copy of it's values */
705 pthread_mutex_lock (&cache_lock);
707 c_avl_get (cache, queue_entry->filename, (void *) &cache_entry);
709 values = cache_entry->values;
710 values_num = cache_entry->values_num;
712 cache_entry->values = NULL;
713 cache_entry->values_num = 0;
714 cache_entry->flags = FLAG_NONE;
716 pthread_mutex_unlock (&cache_lock);
718 /* Update `tv_next_update' */
719 if (write_rate > 0.0)
721 gettimeofday (&tv_now, /* timezone = */ NULL);
722 tv_next_update.tv_sec = tv_now.tv_sec;
723 tv_next_update.tv_usec = tv_now.tv_usec
724 + ((suseconds_t) (1000000 * write_rate));
725 while (tv_next_update.tv_usec > 1000000)
727 tv_next_update.tv_sec++;
728 tv_next_update.tv_usec -= 1000000;
732 /* Write the values to the RRD-file */
733 srrd_update (queue_entry->filename, NULL,
734 values_num, (const char **)values);
735 DEBUG ("rrdtool plugin: queue thread: Wrote %i values to %s",
736 values_num, queue_entry->filename);
738 for (i = 0; i < values_num; i++)
743 sfree (queue_entry->filename);
747 pthread_mutex_lock (&cache_lock);
748 c_avl_destroy (cache);
750 pthread_mutex_unlock (&cache_lock);
752 pthread_exit ((void *) 0);
754 } /* void *rrd_queue_thread */
756 static int rrd_queue_enqueue (const char *filename,
757 rrd_queue_t **head, rrd_queue_t **tail)
759 rrd_queue_t *queue_entry;
761 queue_entry = (rrd_queue_t *) malloc (sizeof (rrd_queue_t));
762 if (queue_entry == NULL)
765 queue_entry->filename = strdup (filename);
766 if (queue_entry->filename == NULL)
772 queue_entry->next = NULL;
774 pthread_mutex_lock (&queue_lock);
779 (*tail)->next = queue_entry;
782 pthread_cond_signal (&queue_cond);
783 pthread_mutex_unlock (&queue_lock);
786 } /* int rrd_queue_enqueue */
788 static int rrd_queue_dequeue (const char *filename,
789 rrd_queue_t **head, rrd_queue_t **tail)
794 pthread_mutex_lock (&queue_lock);
801 if (strcmp (this->filename, filename) == 0)
810 pthread_mutex_unlock (&queue_lock);
817 prev->next = this->next;
819 if (this->next == NULL)
822 pthread_mutex_unlock (&queue_lock);
824 sfree (this->filename);
828 } /* int rrd_queue_dequeue */
830 static void rrd_cache_flush (int timeout)
839 c_avl_iterator_t *iter;
842 DEBUG ("rrdtool plugin: Flushing cache, timeout = %i", timeout);
846 /* Build a list of entries to be flushed */
847 iter = c_avl_get_iterator (cache);
848 while (c_avl_iterator_next (iter, (void *) &key, (void *) &rc) == 0)
850 if (rc->flags != FLAG_NONE)
852 else if ((now - rc->first_value) < timeout)
854 else if (rc->values_num > 0)
858 status = rrd_queue_enqueue (key, &queue_head, &queue_tail);
860 rc->flags = FLAG_QUEUED;
862 else /* ancient and no values -> waste of memory */
864 char **tmp = (char **) realloc ((void *) keys,
865 (keys_num + 1) * sizeof (char *));
869 ERROR ("rrdtool plugin: "
870 "realloc failed: %s",
871 sstrerror (errno, errbuf,
873 c_avl_iterator_destroy (iter);
878 keys[keys_num] = key;
881 } /* while (c_avl_iterator_next) */
882 c_avl_iterator_destroy (iter);
884 for (i = 0; i < keys_num; i++)
886 if (c_avl_remove (cache, keys[i], (void *) &key, (void *) &rc) != 0)
888 DEBUG ("rrdtool plugin: c_avl_remove (%s) failed.", keys[i]);
892 assert (rc->values == NULL);
893 assert (rc->values_num == 0);
898 } /* for (i = 0..keys_num) */
902 cache_flush_last = now;
903 } /* void rrd_cache_flush */
905 static int rrd_cache_flush_identifier (int timeout, const char *identifier)
912 if (identifier == NULL)
914 rrd_cache_flush (timeout);
921 snprintf (key, sizeof (key), "%s.rrd",
924 snprintf (key, sizeof (key), "%s/%s.rrd",
925 datadir, identifier);
926 key[sizeof (key) - 1] = 0;
928 status = c_avl_get (cache, key, (void *) &rc);
931 WARNING ("rrdtool plugin: rrd_cache_flush_identifier: "
932 "c_avl_get (%s) failed. Does that file really exist?",
937 if (rc->flags == FLAG_FLUSHQ)
941 else if (rc->flags == FLAG_QUEUED)
943 rrd_queue_dequeue (key, &queue_head, &queue_tail);
944 status = rrd_queue_enqueue (key, &flushq_head, &flushq_tail);
946 rc->flags = FLAG_FLUSHQ;
948 else if ((now - rc->first_value) < timeout)
952 else if (rc->values_num > 0)
954 status = rrd_queue_enqueue (key, &flushq_head, &flushq_tail);
956 rc->flags = FLAG_FLUSHQ;
960 } /* int rrd_cache_flush_identifier */
962 static int rrd_cache_insert (const char *filename,
963 const char *value, time_t value_time)
965 rrd_cache_t *rc = NULL;
969 pthread_mutex_lock (&cache_lock);
971 c_avl_get (cache, filename, (void *) &rc);
975 rc = (rrd_cache_t *) malloc (sizeof (rrd_cache_t));
982 rc->flags = FLAG_NONE;
986 if (rc->last_value >= value_time)
988 pthread_mutex_unlock (&cache_lock);
989 WARNING ("rrdtool plugin: (rc->last_value = %u) >= (value_time = %u)",
990 (unsigned int) rc->last_value,
991 (unsigned int) value_time);
995 values_new = (char **) realloc ((void *) rc->values,
996 (rc->values_num + 1) * sizeof (char *));
997 if (values_new == NULL)
1000 void *cache_key = NULL;
1002 sstrerror (errno, errbuf, sizeof (errbuf));
1004 c_avl_remove (cache, filename, &cache_key, NULL);
1005 pthread_mutex_unlock (&cache_lock);
1007 ERROR ("rrdtool plugin: realloc failed: %s", errbuf);
1014 rc->values = values_new;
1016 rc->values[rc->values_num] = strdup (value);
1017 if (rc->values[rc->values_num] != NULL)
1020 if (rc->values_num == 1)
1021 rc->first_value = value_time;
1022 rc->last_value = value_time;
1024 /* Insert if this is the first value */
1027 void *cache_key = strdup (filename);
1029 if (cache_key == NULL)
1032 sstrerror (errno, errbuf, sizeof (errbuf));
1034 pthread_mutex_unlock (&cache_lock);
1036 ERROR ("rrdtool plugin: strdup failed: %s", errbuf);
1038 sfree (rc->values[0]);
1044 c_avl_insert (cache, cache_key, rc);
1047 DEBUG ("rrdtool plugin: rrd_cache_insert: file = %s; "
1048 "values_num = %i; age = %lu;",
1049 filename, rc->values_num,
1050 (unsigned long)(rc->last_value - rc->first_value));
1052 if ((rc->last_value - rc->first_value) >= cache_timeout)
1054 /* XXX: If you need to lock both, cache_lock and queue_lock, at
1055 * the same time, ALWAYS lock `cache_lock' first! */
1056 if (rc->flags == FLAG_NONE)
1060 status = rrd_queue_enqueue (filename, &queue_head, &queue_tail);
1062 rc->flags = FLAG_QUEUED;
1066 DEBUG ("rrdtool plugin: `%s' is already queued.", filename);
1070 if ((cache_timeout > 0) &&
1071 ((time (NULL) - cache_flush_last) > cache_flush_timeout))
1072 rrd_cache_flush (cache_flush_timeout);
1074 pthread_mutex_unlock (&cache_lock);
1077 } /* int rrd_cache_insert */
1079 static int rrd_compare_numeric (const void *a_ptr, const void *b_ptr)
1081 int a = *((int *) a_ptr);
1082 int b = *((int *) b_ptr);
1090 } /* int rrd_compare_numeric */
1092 static int rrd_write (const data_set_t *ds, const value_list_t *vl)
1094 struct stat statbuf;
1099 if (0 != strcmp (ds->type, vl->type)) {
1100 ERROR ("rrdtool plugin: DS type does not match value list type");
1104 if (value_list_to_filename (filename, sizeof (filename), ds, vl) != 0)
1107 if (value_list_to_string (values, sizeof (values), ds, vl) != 0)
1110 if (stat (filename, &statbuf) == -1)
1112 if (errno == ENOENT)
1114 if (rrd_create_file (filename, ds, vl))
1120 ERROR ("stat(%s) failed: %s", filename,
1121 sstrerror (errno, errbuf,
1126 else if (!S_ISREG (statbuf.st_mode))
1128 ERROR ("stat(%s): Not a regular file!",
1133 status = rrd_cache_insert (filename, values, vl->time);
1136 } /* int rrd_write */
1138 static int rrd_flush (int timeout, const char *identifier)
1140 pthread_mutex_lock (&cache_lock);
1142 if (cache == NULL) {
1143 pthread_mutex_unlock (&cache_lock);
1147 rrd_cache_flush_identifier (timeout, identifier);
1149 pthread_mutex_unlock (&cache_lock);
1151 } /* int rrd_flush */
1153 static int rrd_config (const char *key, const char *value)
1155 if (strcasecmp ("CacheTimeout", key) == 0)
1157 int tmp = atoi (value);
1160 fprintf (stderr, "rrdtool: `CacheTimeout' must "
1161 "be greater than 0.\n");
1162 ERROR ("rrdtool: `CacheTimeout' must "
1163 "be greater than 0.\n");
1166 cache_timeout = tmp;
1168 else if (strcasecmp ("CacheFlush", key) == 0)
1170 int tmp = atoi (value);
1173 fprintf (stderr, "rrdtool: `CacheFlush' must "
1174 "be greater than 0.\n");
1175 ERROR ("rrdtool: `CacheFlush' must "
1176 "be greater than 0.\n");
1179 cache_flush_timeout = tmp;
1181 else if (strcasecmp ("DataDir", key) == 0)
1183 if (datadir != NULL)
1185 datadir = strdup (value);
1186 if (datadir != NULL)
1188 int len = strlen (datadir);
1189 while ((len > 0) && (datadir[len - 1] == '/'))
1192 datadir[len] = '\0';
1201 else if (strcasecmp ("StepSize", key) == 0)
1203 stepsize = atoi (value);
1207 else if (strcasecmp ("HeartBeat", key) == 0)
1209 heartbeat = atoi (value);
1213 else if (strcasecmp ("RRARows", key) == 0)
1215 int tmp = atoi (value);
1218 fprintf (stderr, "rrdtool: `RRARows' must "
1219 "be greater than 0.\n");
1220 ERROR ("rrdtool: `RRARows' must "
1221 "be greater than 0.\n");
1226 else if (strcasecmp ("RRATimespan", key) == 0)
1228 char *saveptr = NULL;
1234 value_copy = strdup (value);
1235 if (value_copy == NULL)
1239 while ((ptr = strtok_r (dummy, ", \t", &saveptr)) != NULL)
1243 tmp_alloc = realloc (rra_timespans_custom,
1244 sizeof (int) * (rra_timespans_custom_num + 1));
1245 if (tmp_alloc == NULL)
1247 fprintf (stderr, "rrdtool: realloc failed.\n");
1248 ERROR ("rrdtool: realloc failed.\n");
1252 rra_timespans_custom = tmp_alloc;
1253 rra_timespans_custom[rra_timespans_custom_num] = atoi (ptr);
1254 if (rra_timespans_custom[rra_timespans_custom_num] != 0)
1255 rra_timespans_custom_num++;
1256 } /* while (strtok_r) */
1258 qsort (/* base = */ rra_timespans_custom,
1259 /* nmemb = */ rra_timespans_custom_num,
1260 /* size = */ sizeof (rra_timespans_custom[0]),
1261 /* compar = */ rrd_compare_numeric);
1265 else if (strcasecmp ("XFF", key) == 0)
1267 double tmp = atof (value);
1268 if ((tmp < 0.0) || (tmp >= 1.0))
1270 fprintf (stderr, "rrdtool: `XFF' must "
1271 "be in the range 0 to 1 (exclusive).");
1272 ERROR ("rrdtool: `XFF' must "
1273 "be in the range 0 to 1 (exclusive).");
1278 else if (strcasecmp ("WritesPerSecond", key) == 0)
1280 double wps = atof (value);
1284 fprintf (stderr, "rrdtool: `WritesPerSecond' must be "
1285 "greater than or equal to zero.");
1288 else if (wps == 0.0)
1294 write_rate = 1.0 / wps;
1302 } /* int rrd_config */
1304 static int rrd_shutdown (void)
1306 pthread_mutex_lock (&cache_lock);
1307 rrd_cache_flush (-1);
1308 pthread_mutex_unlock (&cache_lock);
1310 pthread_mutex_lock (&queue_lock);
1312 pthread_cond_signal (&queue_cond);
1313 pthread_mutex_unlock (&queue_lock);
1315 /* Wait for all the values to be written to disk before returning. */
1316 if (queue_thread != 0)
1318 pthread_join (queue_thread, NULL);
1320 DEBUG ("rrdtool plugin: queue_thread exited.");
1324 } /* int rrd_shutdown */
1326 static int rrd_init (void)
1333 heartbeat = 2 * stepsize;
1335 if ((heartbeat > 0) && (heartbeat < interval_g))
1336 WARNING ("rrdtool plugin: Your `heartbeat' is "
1337 "smaller than your `interval'. This will "
1338 "likely cause problems.");
1339 else if ((stepsize > 0) && (stepsize < interval_g))
1340 WARNING ("rrdtool plugin: Your `stepsize' is "
1341 "smaller than your `interval'. This will "
1342 "create needlessly big RRD-files.");
1344 /* Set the cache up */
1345 pthread_mutex_lock (&cache_lock);
1347 cache = c_avl_create ((int (*) (const void *, const void *)) strcmp);
1350 ERROR ("rrdtool plugin: c_avl_create failed.");
1354 cache_flush_last = time (NULL);
1355 if (cache_timeout < 2)
1358 cache_flush_timeout = 0;
1360 else if (cache_flush_timeout < cache_timeout)
1361 cache_flush_timeout = 10 * cache_timeout;
1363 pthread_mutex_unlock (&cache_lock);
1365 status = pthread_create (&queue_thread, NULL, rrd_queue_thread, NULL);
1368 ERROR ("rrdtool plugin: Cannot create queue-thread.");
1372 DEBUG ("rrdtool plugin: rrd_init: datadir = %s; stepsize = %i;"
1373 " heartbeat = %i; rrarows = %i; xff = %lf;",
1374 (datadir == NULL) ? "(null)" : datadir,
1375 stepsize, heartbeat, rrarows, xff);
1378 } /* int rrd_init */
1380 void module_register (void)
1382 plugin_register_config ("rrdtool", rrd_config,
1383 config_keys, config_keys_num);
1384 plugin_register_init ("rrdtool", rrd_init);
1385 plugin_register_write ("rrdtool", rrd_write);
1386 plugin_register_flush ("rrdtool", rrd_flush);
1387 plugin_register_shutdown ("rrdtool", rrd_shutdown);