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"
48 typedef struct rrd_cache_s rrd_cache_t;
55 typedef enum rrd_queue_dir_e rrd_queue_dir_t;
60 struct rrd_queue_s *next;
62 typedef struct rrd_queue_s rrd_queue_t;
67 static int rra_timespans[] =
75 static int rra_timespans_num = STATIC_ARRAY_SIZE (rra_timespans);
77 static int *rra_timespans_custom = NULL;
78 static int rra_timespans_custom_num = 0;
80 static char *rra_types[] =
86 static int rra_types_num = STATIC_ARRAY_SIZE (rra_types);
88 static const char *config_keys[] =
99 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
101 /* If datadir is zero, the daemon's basedir is used. If stepsize or heartbeat
102 * is zero a default, depending on the `interval' member of the value list is
104 static char *datadir = NULL;
105 static int stepsize = 0;
106 static int heartbeat = 0;
107 static int rrarows = 1200;
108 static double xff = 0.1;
110 /* XXX: If you need to lock both, cache_lock and queue_lock, at the same time,
111 * ALWAYS lock `cache_lock' first! */
112 static int cache_timeout = 0;
113 static int cache_flush_timeout = 0;
114 static time_t cache_flush_last;
115 static c_avl_tree_t *cache = NULL;
116 static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
118 static rrd_queue_t *queue_head = NULL;
119 static rrd_queue_t *queue_tail = NULL;
120 static pthread_t queue_thread = 0;
121 static pthread_mutex_t queue_lock = PTHREAD_MUTEX_INITIALIZER;
122 static pthread_cond_t queue_cond = PTHREAD_COND_INITIALIZER;
124 #if !HAVE_THREADSAFE_LIBRRD
125 static pthread_mutex_t librrd_lock = PTHREAD_MUTEX_INITIALIZER;
128 static int do_shutdown = 0;
134 static void rra_free (int rra_num, char **rra_def)
138 for (i = 0; i < rra_num; i++)
143 } /* void rra_free */
145 static int rra_get (char ***ret, const value_list_t *vl)
163 /* The stepsize we use here: If it is user-set, use it. If not, use the
164 * interval of the value-list. */
173 ss = (stepsize > 0) ? stepsize : vl->interval;
180 /* Use the configured timespans or fall back to the built-in defaults */
181 if (rra_timespans_custom_num != 0)
183 rts = rra_timespans_custom;
184 rts_num = rra_timespans_custom_num;
189 rts_num = rra_timespans_num;
192 rra_max = rts_num * rra_types_num;
194 if ((rra_def = (char **) malloc ((rra_max + 1) * sizeof (char *))) == NULL)
196 memset (rra_def, '\0', (rra_max + 1) * sizeof (char *));
200 for (i = 0; i < rts_num; i++)
204 if ((span / ss) < rrarows)
210 cdp_len = (int) floor (((double) span)
211 / ((double) (rrarows * ss)));
213 cdp_num = (int) ceil (((double) span)
214 / ((double) (cdp_len * ss)));
216 for (j = 0; j < rra_types_num; j++)
218 if (rra_num >= rra_max)
221 if (ssnprintf (buffer, sizeof (buffer), "RRA:%s:%3.1f:%u:%u",
223 cdp_len, cdp_num) >= sizeof (buffer))
225 ERROR ("rra_get: Buffer would have been truncated.");
229 rra_def[rra_num++] = sstrdup (buffer);
234 DEBUG ("rra_num = %i", rra_num);
235 for (i = 0; i < rra_num; i++)
236 DEBUG (" %s", rra_def[i]);
243 static void ds_free (int ds_num, char **ds_def)
247 for (i = 0; i < ds_num; i++)
248 if (ds_def[i] != NULL)
253 static int ds_get (char ***ret, const data_set_t *ds, const value_list_t *vl)
262 DEBUG ("ds->ds_num = %i", ds->ds_num);
264 ds_def = (char **) malloc (ds->ds_num * sizeof (char *));
268 ERROR ("rrdtool plugin: malloc failed: %s",
269 sstrerror (errno, errbuf, sizeof (errbuf)));
272 memset (ds_def, '\0', ds->ds_num * sizeof (char *));
274 for (ds_num = 0; ds_num < ds->ds_num; ds_num++)
276 data_source_t *d = ds->ds + ds_num;
280 ds_def[ds_num] = NULL;
282 if (d->type == DS_TYPE_COUNTER)
284 else if (d->type == DS_TYPE_GAUGE)
288 ERROR ("rrdtool plugin: Unknown DS type: %i",
295 sstrncpy (min, "U", sizeof (min));
298 ssnprintf (min, sizeof (min), "%lf", d->min);
302 sstrncpy (max, "U", sizeof (max));
305 ssnprintf (max, sizeof (max), "%lf", d->max);
307 status = ssnprintf (buffer, sizeof (buffer),
310 (heartbeat > 0) ? heartbeat : (2 * vl->interval),
312 if ((status < 1) || (status >= sizeof (buffer)))
315 ds_def[ds_num] = sstrdup (buffer);
316 } /* for ds_num = 0 .. ds->ds_num */
321 DEBUG ("ds_num = %i", ds_num);
322 for (i = 0; i < ds_num; i++)
323 DEBUG (" %s", ds_def[i]);
327 if (ds_num != ds->ds_num)
329 ds_free (ds_num, ds_def);
337 #if HAVE_THREADSAFE_LIBRRD
338 static int srrd_create (char *filename, unsigned long pdp_step, time_t last_up,
339 int argc, const char **argv)
343 optind = 0; /* bug in librrd? */
346 status = rrd_create_r (filename, pdp_step, last_up, argc, (void *) argv);
350 WARNING ("rrdtool plugin: rrd_create_r (%s) failed: %s",
351 filename, rrd_get_error ());
355 } /* int srrd_create */
357 static int srrd_update (char *filename, char *template,
358 int argc, const char **argv)
362 optind = 0; /* bug in librrd? */
365 status = rrd_update_r (filename, template, argc, (void *) argv);
369 WARNING ("rrdtool plugin: rrd_update_r (%s) failed: %s",
370 filename, rrd_get_error ());
374 } /* int srrd_update */
375 /* #endif HAVE_THREADSAFE_LIBRRD */
377 #else /* !HAVE_THREADSAFE_LIBRRD */
378 static int srrd_create (char *filename, unsigned long pdp_step, time_t last_up,
379 int argc, const char **argv)
386 char pdp_step_str[16];
387 char last_up_str[16];
390 new_argv = (char **) malloc ((new_argc + 1) * sizeof (char *));
391 if (new_argv == NULL)
393 ERROR ("rrdtool plugin: malloc failed.");
398 last_up = time (NULL) - 10;
400 ssnprintf (pdp_step_str, sizeof (pdp_step_str), "%lu", pdp_step);
401 ssnprintf (last_up_str, sizeof (last_up_str), "%u", (unsigned int) last_up);
403 new_argv[0] = "create";
404 new_argv[1] = filename;
406 new_argv[3] = pdp_step_str;
408 new_argv[5] = last_up_str;
410 memcpy (new_argv + 6, argv, argc * sizeof (char *));
411 new_argv[new_argc] = NULL;
413 pthread_mutex_lock (&librrd_lock);
414 optind = 0; /* bug in librrd? */
417 status = rrd_create (new_argc, new_argv);
418 pthread_mutex_unlock (&librrd_lock);
422 WARNING ("rrdtool plugin: rrd_create (%s) failed: %s",
423 filename, rrd_get_error ());
429 } /* int srrd_create */
431 static int srrd_update (char *filename, char *template,
432 int argc, const char **argv)
439 assert (template == NULL);
442 new_argv = (char **) malloc ((new_argc + 1) * sizeof (char *));
443 if (new_argv == NULL)
445 ERROR ("rrdtool plugin: malloc failed.");
449 new_argv[0] = "update";
450 new_argv[1] = filename;
452 memcpy (new_argv + 2, argv, argc * sizeof (char *));
453 new_argv[new_argc] = NULL;
455 pthread_mutex_lock (&librrd_lock);
456 optind = 0; /* bug in librrd? */
459 status = rrd_update (new_argc, new_argv);
460 pthread_mutex_unlock (&librrd_lock);
464 WARNING ("rrdtool plugin: rrd_update_r failed: %s: %s",
465 argv[1], rrd_get_error ());
471 } /* int srrd_update */
472 #endif /* !HAVE_THREADSAFE_LIBRRD */
474 static int rrd_create_file (char *filename, const data_set_t *ds, const value_list_t *vl)
484 if (check_create_dir (filename))
487 if ((rra_num = rra_get (&rra_def, vl)) < 1)
489 ERROR ("rrd_create_file failed: Could not calculate RRAs");
493 if ((ds_num = ds_get (&ds_def, ds, vl)) < 1)
495 ERROR ("rrd_create_file failed: Could not calculate DSes");
499 argc = ds_num + rra_num;
501 if ((argv = (char **) malloc (sizeof (char *) * (argc + 1))) == NULL)
504 ERROR ("rrd_create failed: %s",
505 sstrerror (errno, errbuf, sizeof (errbuf)));
509 memcpy (argv, ds_def, ds_num * sizeof (char *));
510 memcpy (argv + ds_num, rra_def, rra_num * sizeof (char *));
511 argv[ds_num + rra_num] = NULL;
513 assert (vl->time > 10);
514 status = srrd_create (filename,
515 (stepsize > 0) ? stepsize : vl->interval,
517 argc, (const char **)argv);
520 ds_free (ds_num, ds_def);
521 rra_free (rra_num, rra_def);
526 static int value_list_to_string (char *buffer, int buffer_len,
527 const data_set_t *ds, const value_list_t *vl)
533 memset (buffer, '\0', buffer_len);
535 status = ssnprintf (buffer, buffer_len, "%u", (unsigned int) vl->time);
536 if ((status < 1) || (status >= buffer_len))
540 for (i = 0; i < ds->ds_num; i++)
542 if ((ds->ds[i].type != DS_TYPE_COUNTER)
543 && (ds->ds[i].type != DS_TYPE_GAUGE))
546 if (ds->ds[i].type == DS_TYPE_COUNTER)
547 status = ssnprintf (buffer + offset, buffer_len - offset,
548 ":%llu", vl->values[i].counter);
550 status = ssnprintf (buffer + offset, buffer_len - offset,
551 ":%lf", vl->values[i].gauge);
553 if ((status < 1) || (status >= (buffer_len - offset)))
557 } /* for ds->ds_num */
560 } /* int value_list_to_string */
562 static int value_list_to_filename (char *buffer, int buffer_len,
563 const data_set_t *ds, const value_list_t *vl)
570 status = ssnprintf (buffer + offset, buffer_len - offset,
572 if ((status < 1) || (status >= buffer_len - offset))
577 status = ssnprintf (buffer + offset, buffer_len - offset,
579 if ((status < 1) || (status >= buffer_len - offset))
583 if (strlen (vl->plugin_instance) > 0)
584 status = ssnprintf (buffer + offset, buffer_len - offset,
585 "%s-%s/", vl->plugin, vl->plugin_instance);
587 status = ssnprintf (buffer + offset, buffer_len - offset,
589 if ((status < 1) || (status >= buffer_len - offset))
593 if (strlen (vl->type_instance) > 0)
594 status = ssnprintf (buffer + offset, buffer_len - offset,
595 "%s-%s.rrd", vl->type, vl->type_instance);
597 status = ssnprintf (buffer + offset, buffer_len - offset,
599 if ((status < 1) || (status >= buffer_len - offset))
604 } /* int value_list_to_filename */
606 static void *rrd_queue_thread (void *data)
610 rrd_queue_t *queue_entry;
611 rrd_cache_t *cache_entry;
616 /* XXX: If you need to lock both, cache_lock and queue_lock, at
617 * the same time, ALWAYS lock `cache_lock' first! */
619 /* wait until an entry is available */
620 pthread_mutex_lock (&queue_lock);
621 while ((queue_head == NULL) && (do_shutdown == 0))
622 pthread_cond_wait (&queue_cond, &queue_lock);
624 /* We're in the shutdown phase */
625 if (queue_head == NULL)
627 pthread_mutex_unlock (&queue_lock);
631 /* Dequeue the first entry */
632 queue_entry = queue_head;
633 if (queue_head == queue_tail)
634 queue_head = queue_tail = NULL;
636 queue_head = queue_head->next;
638 /* Unlock the queue again */
639 pthread_mutex_unlock (&queue_lock);
641 /* We now need the cache lock so the entry isn't updated while
642 * we make a copy of it's values */
643 pthread_mutex_lock (&cache_lock);
645 c_avl_get (cache, queue_entry->filename, (void *) &cache_entry);
647 values = cache_entry->values;
648 values_num = cache_entry->values_num;
650 cache_entry->values = NULL;
651 cache_entry->values_num = 0;
652 cache_entry->flags = FLAG_NONE;
654 pthread_mutex_unlock (&cache_lock);
656 /* Write the values to the RRD-file */
657 srrd_update (queue_entry->filename, NULL,
658 values_num, (const char **)values);
659 DEBUG ("rrdtool plugin: queue thread: Wrote %i values to %s",
660 values_num, queue_entry->filename);
662 for (i = 0; i < values_num; i++)
667 sfree (queue_entry->filename);
671 pthread_mutex_lock (&cache_lock);
672 c_avl_destroy (cache);
674 pthread_mutex_unlock (&cache_lock);
676 pthread_exit ((void *) 0);
678 } /* void *rrd_queue_thread */
680 static int rrd_queue_cache_entry (const char *filename, rrd_queue_dir_t dir)
682 rrd_queue_t *queue_entry;
684 queue_entry = (rrd_queue_t *) malloc (sizeof (rrd_queue_t));
685 if (queue_entry == NULL)
688 queue_entry->filename = strdup (filename);
689 if (queue_entry->filename == NULL)
695 queue_entry->next = NULL;
697 pthread_mutex_lock (&queue_lock);
698 if (dir == QUEUE_INSERT_FRONT)
700 queue_entry->next = queue_head;
701 queue_head = queue_entry;
702 if (queue_tail == NULL)
703 queue_tail = queue_head;
705 else /* (dir == QUEUE_INSERT_BACK) */
707 if (queue_tail == NULL)
708 queue_head = queue_entry;
710 queue_tail->next = queue_entry;
711 queue_tail = queue_entry;
713 pthread_cond_signal (&queue_cond);
714 pthread_mutex_unlock (&queue_lock);
716 DEBUG ("rrdtool plugin: Put `%s' into the update queue", filename);
719 } /* int rrd_queue_cache_entry */
721 static int rrd_queue_move_to_front (const char *filename)
728 pthread_mutex_lock (&queue_lock);
729 for (this = queue_head; this != NULL; this = this->next)
731 if (strcmp (this->filename, filename) == 0)
736 /* Check if we found the entry and if it is NOT the first entry. */
737 if ((this != NULL) && (prev != NULL))
739 prev->next = this->next;
740 this->next = queue_head;
743 pthread_mutex_unlock (&queue_lock);
746 } /* int rrd_queue_move_to_front */
748 static void rrd_cache_flush (int timeout)
757 c_avl_iterator_t *iter;
760 DEBUG ("rrdtool plugin: Flushing cache, timeout = %i", timeout);
764 /* Build a list of entries to be flushed */
765 iter = c_avl_get_iterator (cache);
766 while (c_avl_iterator_next (iter, (void *) &key, (void *) &rc) == 0)
768 if (rc->flags == FLAG_QUEUED)
770 else if ((now - rc->first_value) < timeout)
772 else if (rc->values_num > 0)
774 if (rrd_queue_cache_entry (key, QUEUE_INSERT_BACK) == 0)
775 rc->flags = FLAG_QUEUED;
777 else /* ancient and no values -> waste of memory */
779 char **tmp = (char **) realloc ((void *) keys,
780 (keys_num + 1) * sizeof (char *));
784 ERROR ("rrdtool plugin: "
785 "realloc failed: %s",
786 sstrerror (errno, errbuf,
788 c_avl_iterator_destroy (iter);
793 keys[keys_num] = key;
796 } /* while (c_avl_iterator_next) */
797 c_avl_iterator_destroy (iter);
799 for (i = 0; i < keys_num; i++)
801 if (c_avl_remove (cache, keys[i], (void *) &key, (void *) &rc) != 0)
803 DEBUG ("rrdtool plugin: c_avl_remove (%s) failed.", keys[i]);
807 assert (rc->values == NULL);
808 assert (rc->values_num == 0);
813 } /* for (i = 0..keys_num) */
817 cache_flush_last = now;
818 } /* void rrd_cache_flush */
820 static int rrd_cache_flush_identifier (int timeout, const char *identifier)
827 if (identifier == NULL)
829 rrd_cache_flush (timeout);
836 snprintf (key, sizeof (key), "%s.rrd",
839 snprintf (key, sizeof (key), "%s/%s.rrd",
840 datadir, identifier);
841 key[sizeof (key) - 1] = 0;
843 status = c_avl_get (cache, key, (void *) &rc);
846 WARNING ("rrdtool plugin: rrd_cache_flush_identifier: "
847 "c_avl_get (%s) failed. Does that file really exist?",
852 if (rc->flags == FLAG_QUEUED)
853 status = rrd_queue_move_to_front (key);
854 else if ((now - rc->first_value) < timeout)
856 else if (rc->values_num > 0)
858 status = rrd_queue_cache_entry (key, QUEUE_INSERT_FRONT);
860 rc->flags = FLAG_QUEUED;
864 } /* int rrd_cache_flush_identifier */
866 static int rrd_cache_insert (const char *filename,
867 const char *value, time_t value_time)
869 rrd_cache_t *rc = NULL;
873 pthread_mutex_lock (&cache_lock);
875 c_avl_get (cache, filename, (void *) &rc);
879 rc = (rrd_cache_t *) malloc (sizeof (rrd_cache_t));
886 rc->flags = FLAG_NONE;
890 if (rc->last_value >= value_time)
892 pthread_mutex_unlock (&cache_lock);
893 WARNING ("rrdtool plugin: (rc->last_value = %u) >= (value_time = %u)",
894 (unsigned int) rc->last_value,
895 (unsigned int) value_time);
899 values_new = (char **) realloc ((void *) rc->values,
900 (rc->values_num + 1) * sizeof (char *));
901 if (values_new == NULL)
904 void *cache_key = NULL;
906 sstrerror (errno, errbuf, sizeof (errbuf));
908 c_avl_remove (cache, filename, &cache_key, NULL);
909 pthread_mutex_unlock (&cache_lock);
911 ERROR ("rrdtool plugin: realloc failed: %s", errbuf);
918 rc->values = values_new;
920 rc->values[rc->values_num] = strdup (value);
921 if (rc->values[rc->values_num] != NULL)
924 if (rc->values_num == 1)
925 rc->first_value = value_time;
926 rc->last_value = value_time;
928 /* Insert if this is the first value */
931 void *cache_key = strdup (filename);
933 if (cache_key == NULL)
936 sstrerror (errno, errbuf, sizeof (errbuf));
938 pthread_mutex_unlock (&cache_lock);
940 ERROR ("rrdtool plugin: strdup failed: %s", errbuf);
942 sfree (rc->values[0]);
948 c_avl_insert (cache, cache_key, rc);
951 DEBUG ("rrdtool plugin: rrd_cache_insert: file = %s; "
952 "values_num = %i; age = %lu;",
953 filename, rc->values_num,
954 (unsigned long)(rc->last_value - rc->first_value));
956 if ((rc->last_value - rc->first_value) >= cache_timeout)
958 /* XXX: If you need to lock both, cache_lock and queue_lock, at
959 * the same time, ALWAYS lock `cache_lock' first! */
960 if (rc->flags != FLAG_QUEUED)
962 if (rrd_queue_cache_entry (filename, QUEUE_INSERT_BACK) == 0)
963 rc->flags = FLAG_QUEUED;
967 DEBUG ("rrdtool plugin: `%s' is already queued.", filename);
971 if ((cache_timeout > 0) &&
972 ((time (NULL) - cache_flush_last) > cache_flush_timeout))
973 rrd_cache_flush (cache_flush_timeout);
976 pthread_mutex_unlock (&cache_lock);
979 } /* int rrd_cache_insert */
981 static int rrd_compare_numeric (const void *a_ptr, const void *b_ptr)
983 int a = *((int *) a_ptr);
984 int b = *((int *) b_ptr);
992 } /* int rrd_compare_numeric */
994 static int rrd_write (const data_set_t *ds, const value_list_t *vl)
1001 if (0 != strcmp (ds->type, vl->type)) {
1002 ERROR ("rrdtool plugin: DS type does not match value list type");
1006 if (value_list_to_filename (filename, sizeof (filename), ds, vl) != 0)
1009 if (value_list_to_string (values, sizeof (values), ds, vl) != 0)
1012 if (stat (filename, &statbuf) == -1)
1014 if (errno == ENOENT)
1016 if (rrd_create_file (filename, ds, vl))
1022 ERROR ("stat(%s) failed: %s", filename,
1023 sstrerror (errno, errbuf,
1028 else if (!S_ISREG (statbuf.st_mode))
1030 ERROR ("stat(%s): Not a regular file!",
1035 status = rrd_cache_insert (filename, values, vl->time);
1038 } /* int rrd_write */
1040 static int rrd_flush (int timeout, const char *identifier)
1042 pthread_mutex_lock (&cache_lock);
1044 if (cache == NULL) {
1045 pthread_mutex_unlock (&cache_lock);
1049 rrd_cache_flush_identifier (timeout, identifier);
1051 pthread_mutex_unlock (&cache_lock);
1053 } /* int rrd_flush */
1055 static int rrd_config (const char *key, const char *value)
1057 if (strcasecmp ("CacheTimeout", key) == 0)
1059 int tmp = atoi (value);
1062 fprintf (stderr, "rrdtool: `CacheTimeout' must "
1063 "be greater than 0.\n");
1066 cache_timeout = tmp;
1068 else if (strcasecmp ("CacheFlush", key) == 0)
1070 int tmp = atoi (value);
1073 fprintf (stderr, "rrdtool: `CacheFlush' must "
1074 "be greater than 0.\n");
1077 cache_flush_timeout = tmp;
1079 else if (strcasecmp ("DataDir", key) == 0)
1081 if (datadir != NULL)
1083 datadir = strdup (value);
1084 if (datadir != NULL)
1086 int len = strlen (datadir);
1087 while ((len > 0) && (datadir[len - 1] == '/'))
1090 datadir[len] = '\0';
1099 else if (strcasecmp ("StepSize", key) == 0)
1101 stepsize = atoi (value);
1105 else if (strcasecmp ("HeartBeat", key) == 0)
1107 heartbeat = atoi (value);
1111 else if (strcasecmp ("RRARows", key) == 0)
1113 int tmp = atoi (value);
1116 fprintf (stderr, "rrdtool: `RRARows' must "
1117 "be greater than 0.\n");
1122 else if (strcasecmp ("RRATimespan", key) == 0)
1124 char *saveptr = NULL;
1130 value_copy = strdup (value);
1131 if (value_copy == NULL)
1135 while ((ptr = strtok_r (dummy, ", \t", &saveptr)) != NULL)
1139 tmp_alloc = realloc (rra_timespans_custom,
1140 sizeof (int) * (rra_timespans_custom_num + 1));
1141 if (tmp_alloc == NULL)
1143 fprintf (stderr, "rrdtool: realloc failed.\n");
1147 rra_timespans_custom = tmp_alloc;
1148 rra_timespans_custom[rra_timespans_custom_num] = atoi (ptr);
1149 if (rra_timespans_custom[rra_timespans_custom_num] != 0)
1150 rra_timespans_custom_num++;
1151 } /* while (strtok_r) */
1153 qsort (/* base = */ rra_timespans_custom,
1154 /* nmemb = */ rra_timespans_custom_num,
1155 /* size = */ sizeof (rra_timespans_custom[0]),
1156 /* compar = */ rrd_compare_numeric);
1160 else if (strcasecmp ("XFF", key) == 0)
1162 double tmp = atof (value);
1163 if ((tmp < 0.0) || (tmp >= 1.0))
1165 fprintf (stderr, "rrdtool: `XFF' must "
1166 "be in the range 0 to 1 (exclusive).");
1176 } /* int rrd_config */
1178 static int rrd_shutdown (void)
1180 pthread_mutex_lock (&cache_lock);
1181 rrd_cache_flush (-1);
1182 pthread_mutex_unlock (&cache_lock);
1184 pthread_mutex_lock (&queue_lock);
1186 pthread_cond_signal (&queue_cond);
1187 pthread_mutex_unlock (&queue_lock);
1189 /* Wait for all the values to be written to disk before returning. */
1190 if (queue_thread != 0)
1192 pthread_join (queue_thread, NULL);
1194 DEBUG ("rrdtool plugin: queue_thread exited.");
1198 } /* int rrd_shutdown */
1200 static int rrd_init (void)
1207 heartbeat = 2 * stepsize;
1209 if ((heartbeat > 0) && (heartbeat < interval_g))
1210 WARNING ("rrdtool plugin: Your `heartbeat' is "
1211 "smaller than your `interval'. This will "
1212 "likely cause problems.");
1213 else if ((stepsize > 0) && (stepsize < interval_g))
1214 WARNING ("rrdtool plugin: Your `stepsize' is "
1215 "smaller than your `interval'. This will "
1216 "create needlessly big RRD-files.");
1218 /* Set the cache up */
1219 pthread_mutex_lock (&cache_lock);
1221 cache = c_avl_create ((int (*) (const void *, const void *)) strcmp);
1224 ERROR ("rrdtool plugin: c_avl_create failed.");
1228 cache_flush_last = time (NULL);
1229 if (cache_timeout < 2)
1232 cache_flush_timeout = 0;
1234 else if (cache_flush_timeout < cache_timeout)
1235 cache_flush_timeout = 10 * cache_timeout;
1237 pthread_mutex_unlock (&cache_lock);
1239 status = pthread_create (&queue_thread, NULL, rrd_queue_thread, NULL);
1242 ERROR ("rrdtool plugin: Cannot create queue-thread.");
1246 DEBUG ("rrdtool plugin: rrd_init: datadir = %s; stepsize = %i;"
1247 " heartbeat = %i; rrarows = %i; xff = %lf;",
1248 (datadir == NULL) ? "(null)" : datadir,
1249 stepsize, heartbeat, rrarows, xff);
1252 } /* int rrd_init */
1254 void module_register (void)
1256 plugin_register_config ("rrdtool", rrd_config,
1257 config_keys, config_keys_num);
1258 plugin_register_init ("rrdtool", rrd_init);
1259 plugin_register_write ("rrdtool", rrd_write);
1260 plugin_register_flush ("rrdtool", rrd_flush);
1261 plugin_register_shutdown ("rrdtool", rrd_shutdown);