1 /**
2 * collectd - src/utils_threshold.c
3 * Copyright (C) 2007-2009 Florian octo Forster
4 * Copyright (C) 2008-2009 Sebastian Harl
5 * Copyright (C) 2009 Andrés J. Díaz
6 *
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; only version 2 of the License is applicable.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 *
21 * Author:
22 * Florian octo Forster <octo at verplant.org>
23 * Sebastian Harl <sh at tokkee.org>
24 * Andrés J. Díaz <ajdiaz at connectical.com>
25 **/
27 #include "collectd.h"
28 #include "common.h"
29 #include "plugin.h"
30 #include "utils_avltree.h"
31 #include "utils_cache.h"
32 #include "utils_threshold.h"
34 #include <assert.h>
35 #include <pthread.h>
37 /*
38 * Private data structures
39 * {{{ */
40 #define UT_FLAG_INVERT 0x01
41 #define UT_FLAG_PERSIST 0x02
42 #define UT_FLAG_PERCENTAGE 0x04
43 /* }}} */
45 /*
46 * Private (static) variables
47 * {{{ */
48 static c_avl_tree_t *threshold_tree = NULL;
49 static pthread_mutex_t threshold_lock = PTHREAD_MUTEX_INITIALIZER;
50 /* }}} */
52 /*
53 * Threshold management
54 * ====================
55 * The following functions add, delete, search, etc. configured thresholds to
56 * the underlying AVL trees.
57 * {{{ */
58 static threshold_t *threshold_get (const char *hostname,
59 const char *plugin, const char *plugin_instance,
60 const char *type, const char *type_instance)
61 {
62 char name[6 * DATA_MAX_NAME_LEN];
63 threshold_t *th = NULL;
65 format_name (name, sizeof (name),
66 (hostname == NULL) ? "" : hostname,
67 (plugin == NULL) ? "" : plugin, plugin_instance,
68 (type == NULL) ? "" : type, type_instance);
69 name[sizeof (name) - 1] = '\0';
71 if (c_avl_get (threshold_tree, name, (void *) &th) == 0)
72 return (th);
73 else
74 return (NULL);
75 } /* threshold_t *threshold_get */
77 static int ut_threshold_add (const threshold_t *th)
78 {
79 char name[6 * DATA_MAX_NAME_LEN];
80 char *name_copy;
81 threshold_t *th_copy;
82 threshold_t *th_ptr;
83 int status = 0;
85 if (format_name (name, sizeof (name), th->host,
86 th->plugin, th->plugin_instance,
87 th->type, th->type_instance) != 0)
88 {
89 ERROR ("ut_threshold_add: format_name failed.");
90 return (-1);
91 }
93 name_copy = strdup (name);
94 if (name_copy == NULL)
95 {
96 ERROR ("ut_threshold_add: strdup failed.");
97 return (-1);
98 }
100 th_copy = (threshold_t *) malloc (sizeof (threshold_t));
101 if (th_copy == NULL)
102 {
103 sfree (name_copy);
104 ERROR ("ut_threshold_add: malloc failed.");
105 return (-1);
106 }
107 memcpy (th_copy, th, sizeof (threshold_t));
108 th_ptr = NULL;
110 DEBUG ("ut_threshold_add: Adding entry `%s'", name);
112 pthread_mutex_lock (&threshold_lock);
114 th_ptr = threshold_get (th->host, th->plugin, th->plugin_instance,
115 th->type, th->type_instance);
117 while ((th_ptr != NULL) && (th_ptr->next != NULL))
118 th_ptr = th_ptr->next;
120 if (th_ptr == NULL) /* no such threshold yet */
121 {
122 status = c_avl_insert (threshold_tree, name_copy, th_copy);
123 }
124 else /* th_ptr points to the last threshold in the list */
125 {
126 th_ptr->next = th_copy;
127 /* name_copy isn't needed */
128 sfree (name_copy);
129 }
131 pthread_mutex_unlock (&threshold_lock);
133 if (status != 0)
134 {
135 ERROR ("ut_threshold_add: c_avl_insert (%s) failed.", name);
136 sfree (name_copy);
137 sfree (th_copy);
138 }
140 return (status);
141 } /* int ut_threshold_add */
142 /*
143 * End of the threshold management functions
144 * }}} */
146 /*
147 * Configuration
148 * =============
149 * The following approximately two hundred functions are used to handle the
150 * configuration and fill the threshold list.
151 * {{{ */
152 static int ut_config_type_datasource (threshold_t *th, oconfig_item_t *ci)
153 {
154 if ((ci->values_num != 1)
155 || (ci->values[0].type != OCONFIG_TYPE_STRING))
156 {
157 WARNING ("threshold values: The `DataSource' option needs exactly one "
158 "string argument.");
159 return (-1);
160 }
162 sstrncpy (th->data_source, ci->values[0].value.string,
163 sizeof (th->data_source));
165 return (0);
166 } /* int ut_config_type_datasource */
168 static int ut_config_type_instance (threshold_t *th, oconfig_item_t *ci)
169 {
170 if ((ci->values_num != 1)
171 || (ci->values[0].type != OCONFIG_TYPE_STRING))
172 {
173 WARNING ("threshold values: The `Instance' option needs exactly one "
174 "string argument.");
175 return (-1);
176 }
178 sstrncpy (th->type_instance, ci->values[0].value.string,
179 sizeof (th->type_instance));
181 return (0);
182 } /* int ut_config_type_instance */
184 static int ut_config_type_max (threshold_t *th, oconfig_item_t *ci)
185 {
186 if ((ci->values_num != 1)
187 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
188 {
189 WARNING ("threshold values: The `%s' option needs exactly one "
190 "number argument.", ci->key);
191 return (-1);
192 }
194 if (strcasecmp (ci->key, "WarningMax") == 0)
195 th->warning_max = ci->values[0].value.number;
196 else
197 th->failure_max = ci->values[0].value.number;
199 return (0);
200 } /* int ut_config_type_max */
202 static int ut_config_type_min (threshold_t *th, oconfig_item_t *ci)
203 {
204 if ((ci->values_num != 1)
205 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
206 {
207 WARNING ("threshold values: The `%s' option needs exactly one "
208 "number argument.", ci->key);
209 return (-1);
210 }
212 if (strcasecmp (ci->key, "WarningMin") == 0)
213 th->warning_min = ci->values[0].value.number;
214 else
215 th->failure_min = ci->values[0].value.number;
217 return (0);
218 } /* int ut_config_type_min */
220 static int ut_config_type_invert (threshold_t *th, oconfig_item_t *ci)
221 {
222 if ((ci->values_num != 1)
223 || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
224 {
225 WARNING ("threshold values: The `Invert' option needs exactly one "
226 "boolean argument.");
227 return (-1);
228 }
230 if (ci->values[0].value.boolean)
231 th->flags |= UT_FLAG_INVERT;
232 else
233 th->flags &= ~UT_FLAG_INVERT;
235 return (0);
236 } /* int ut_config_type_invert */
238 static int ut_config_type_persist (threshold_t *th, oconfig_item_t *ci)
239 {
240 if ((ci->values_num != 1)
241 || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
242 {
243 WARNING ("threshold values: The `Persist' option needs exactly one "
244 "boolean argument.");
245 return (-1);
246 }
248 if (ci->values[0].value.boolean)
249 th->flags |= UT_FLAG_PERSIST;
250 else
251 th->flags &= ~UT_FLAG_PERSIST;
253 return (0);
254 } /* int ut_config_type_persist */
256 static int ut_config_type_percentage(threshold_t *th, oconfig_item_t *ci)
257 {
258 if ((ci->values_num != 1)
259 || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
260 {
261 WARNING ("threshold values: The `Percentage' option needs exactly one "
262 "boolean argument.");
263 return (-1);
264 }
266 if (ci->values[0].value.boolean)
267 th->flags |= UT_FLAG_PERCENTAGE;
268 else
269 th->flags &= ~UT_FLAG_PERCENTAGE;
271 return (0);
272 } /* int ut_config_type_percentage */
274 static int ut_config_type_hits (threshold_t *th, oconfig_item_t *ci)
275 {
276 if ((ci->values_num != 1)
277 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
278 {
279 WARNING ("threshold values: The `%s' option needs exactly one "
280 "number argument.", ci->key);
281 return (-1);
282 }
284 th->hits = ci->values[0].value.number;
286 return (0);
287 } /* int ut_config_type_hits */
289 static int ut_config_type_hysteresis (threshold_t *th, oconfig_item_t *ci)
290 {
291 if ((ci->values_num != 1)
292 || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
293 {
294 WARNING ("threshold values: The `%s' option needs exactly one "
295 "number argument.", ci->key);
296 return (-1);
297 }
299 th->hysteresis = ci->values[0].value.number;
301 return (0);
302 } /* int ut_config_type_hysteresis */
304 static int ut_config_type (const threshold_t *th_orig, oconfig_item_t *ci)
305 {
306 int i;
307 threshold_t th;
308 int status = 0;
310 if ((ci->values_num != 1)
311 || (ci->values[0].type != OCONFIG_TYPE_STRING))
312 {
313 WARNING ("threshold values: The `Type' block needs exactly one string "
314 "argument.");
315 return (-1);
316 }
318 if (ci->children_num < 1)
319 {
320 WARNING ("threshold values: The `Type' block needs at least one option.");
321 return (-1);
322 }
324 memcpy (&th, th_orig, sizeof (th));
325 sstrncpy (th.type, ci->values[0].value.string, sizeof (th.type));
327 th.warning_min = NAN;
328 th.warning_max = NAN;
329 th.failure_min = NAN;
330 th.failure_max = NAN;
331 th.hits = 0;
332 th.hysteresis = 0;
334 for (i = 0; i < ci->children_num; i++)
335 {
336 oconfig_item_t *option = ci->children + i;
337 status = 0;
339 if (strcasecmp ("Instance", option->key) == 0)
340 status = ut_config_type_instance (&th, option);
341 else if (strcasecmp ("DataSource", option->key) == 0)
342 status = ut_config_type_datasource (&th, option);
343 else if ((strcasecmp ("WarningMax", option->key) == 0)
344 || (strcasecmp ("FailureMax", option->key) == 0))
345 status = ut_config_type_max (&th, option);
346 else if ((strcasecmp ("WarningMin", option->key) == 0)
347 || (strcasecmp ("FailureMin", option->key) == 0))
348 status = ut_config_type_min (&th, option);
349 else if (strcasecmp ("Invert", option->key) == 0)
350 status = ut_config_type_invert (&th, option);
351 else if (strcasecmp ("Persist", option->key) == 0)
352 status = ut_config_type_persist (&th, option);
353 else if (strcasecmp ("Percentage", option->key) == 0)
354 status = ut_config_type_percentage (&th, option);
355 else if (strcasecmp ("Hits", option->key) == 0)
356 status = ut_config_type_hits (&th, option);
357 else if (strcasecmp ("Hysteresis", option->key) == 0)
358 status = ut_config_type_hysteresis (&th, option);
359 else
360 {
361 WARNING ("threshold values: Option `%s' not allowed inside a `Type' "
362 "block.", option->key);
363 status = -1;
364 }
366 if (status != 0)
367 break;
368 }
370 if (status == 0)
371 {
372 status = ut_threshold_add (&th);
373 }
375 return (status);
376 } /* int ut_config_type */
378 static int ut_config_plugin_instance (threshold_t *th, oconfig_item_t *ci)
379 {
380 if ((ci->values_num != 1)
381 || (ci->values[0].type != OCONFIG_TYPE_STRING))
382 {
383 WARNING ("threshold values: The `Instance' option needs exactly one "
384 "string argument.");
385 return (-1);
386 }
388 sstrncpy (th->plugin_instance, ci->values[0].value.string,
389 sizeof (th->plugin_instance));
391 return (0);
392 } /* int ut_config_plugin_instance */
394 static int ut_config_plugin (const threshold_t *th_orig, oconfig_item_t *ci)
395 {
396 int i;
397 threshold_t th;
398 int status = 0;
400 if ((ci->values_num != 1)
401 || (ci->values[0].type != OCONFIG_TYPE_STRING))
402 {
403 WARNING ("threshold values: The `Plugin' block needs exactly one string "
404 "argument.");
405 return (-1);
406 }
408 if (ci->children_num < 1)
409 {
410 WARNING ("threshold values: The `Plugin' block needs at least one nested "
411 "block.");
412 return (-1);
413 }
415 memcpy (&th, th_orig, sizeof (th));
416 sstrncpy (th.plugin, ci->values[0].value.string, sizeof (th.plugin));
418 for (i = 0; i < ci->children_num; i++)
419 {
420 oconfig_item_t *option = ci->children + i;
421 status = 0;
423 if (strcasecmp ("Type", option->key) == 0)
424 status = ut_config_type (&th, option);
425 else if (strcasecmp ("Instance", option->key) == 0)
426 status = ut_config_plugin_instance (&th, option);
427 else
428 {
429 WARNING ("threshold values: Option `%s' not allowed inside a `Plugin' "
430 "block.", option->key);
431 status = -1;
432 }
434 if (status != 0)
435 break;
436 }
438 return (status);
439 } /* int ut_config_plugin */
441 static int ut_config_host (const threshold_t *th_orig, oconfig_item_t *ci)
442 {
443 int i;
444 threshold_t th;
445 int status = 0;
447 if ((ci->values_num != 1)
448 || (ci->values[0].type != OCONFIG_TYPE_STRING))
449 {
450 WARNING ("threshold values: The `Host' block needs exactly one string "
451 "argument.");
452 return (-1);
453 }
455 if (ci->children_num < 1)
456 {
457 WARNING ("threshold values: The `Host' block needs at least one nested "
458 "block.");
459 return (-1);
460 }
462 memcpy (&th, th_orig, sizeof (th));
463 sstrncpy (th.host, ci->values[0].value.string, sizeof (th.host));
465 for (i = 0; i < ci->children_num; i++)
466 {
467 oconfig_item_t *option = ci->children + i;
468 status = 0;
470 if (strcasecmp ("Type", option->key) == 0)
471 status = ut_config_type (&th, option);
472 else if (strcasecmp ("Plugin", option->key) == 0)
473 status = ut_config_plugin (&th, option);
474 else
475 {
476 WARNING ("threshold values: Option `%s' not allowed inside a `Host' "
477 "block.", option->key);
478 status = -1;
479 }
481 if (status != 0)
482 break;
483 }
485 return (status);
486 } /* int ut_config_host */
488 int ut_config (const oconfig_item_t *ci)
489 {
490 int i;
491 int status = 0;
493 threshold_t th;
495 if (ci->values_num != 0)
496 {
497 ERROR ("threshold values: The `Threshold' block may not have any "
498 "arguments.");
499 return (-1);
500 }
502 if (threshold_tree == NULL)
503 {
504 threshold_tree = c_avl_create ((void *) strcmp);
505 if (threshold_tree == NULL)
506 {
507 ERROR ("ut_config: c_avl_create failed.");
508 return (-1);
509 }
510 }
512 memset (&th, '\0', sizeof (th));
513 th.warning_min = NAN;
514 th.warning_max = NAN;
515 th.failure_min = NAN;
516 th.failure_max = NAN;
518 th.hits = 0;
519 th.hysteresis = 0;
521 for (i = 0; i < ci->children_num; i++)
522 {
523 oconfig_item_t *option = ci->children + i;
524 status = 0;
526 if (strcasecmp ("Type", option->key) == 0)
527 status = ut_config_type (&th, option);
528 else if (strcasecmp ("Plugin", option->key) == 0)
529 status = ut_config_plugin (&th, option);
530 else if (strcasecmp ("Host", option->key) == 0)
531 status = ut_config_host (&th, option);
532 else
533 {
534 WARNING ("threshold values: Option `%s' not allowed here.", option->key);
535 status = -1;
536 }
538 if (status != 0)
539 break;
540 }
542 return (status);
543 } /* int um_config */
544 /*
545 * End of the functions used to configure threshold values.
546 */
547 /* }}} */
549 static threshold_t *threshold_search (const value_list_t *vl)
550 {
551 threshold_t *th;
553 if ((th = threshold_get (vl->host, vl->plugin, vl->plugin_instance,
554 vl->type, vl->type_instance)) != NULL)
555 return (th);
556 else if ((th = threshold_get (vl->host, vl->plugin, vl->plugin_instance,
557 vl->type, NULL)) != NULL)
558 return (th);
559 else if ((th = threshold_get (vl->host, vl->plugin, NULL,
560 vl->type, vl->type_instance)) != NULL)
561 return (th);
562 else if ((th = threshold_get (vl->host, vl->plugin, NULL,
563 vl->type, NULL)) != NULL)
564 return (th);
565 else if ((th = threshold_get (vl->host, "", NULL,
566 vl->type, vl->type_instance)) != NULL)
567 return (th);
568 else if ((th = threshold_get (vl->host, "", NULL,
569 vl->type, NULL)) != NULL)
570 return (th);
571 else if ((th = threshold_get ("", vl->plugin, vl->plugin_instance,
572 vl->type, vl->type_instance)) != NULL)
573 return (th);
574 else if ((th = threshold_get ("", vl->plugin, vl->plugin_instance,
575 vl->type, NULL)) != NULL)
576 return (th);
577 else if ((th = threshold_get ("", vl->plugin, NULL,
578 vl->type, vl->type_instance)) != NULL)
579 return (th);
580 else if ((th = threshold_get ("", vl->plugin, NULL,
581 vl->type, NULL)) != NULL)
582 return (th);
583 else if ((th = threshold_get ("", "", NULL,
584 vl->type, vl->type_instance)) != NULL)
585 return (th);
586 else if ((th = threshold_get ("", "", NULL,
587 vl->type, NULL)) != NULL)
588 return (th);
590 return (NULL);
591 } /* threshold_t *threshold_search */
593 /*
594 * int ut_report_state
595 *
596 * Checks if the `state' differs from the old state and creates a notification
597 * if appropriate.
598 * Does not fail.
599 */
600 static int ut_report_state (const data_set_t *ds,
601 const value_list_t *vl,
602 const threshold_t *th,
603 const gauge_t *values,
604 int ds_index,
605 int state)
606 { /* {{{ */
607 int state_old;
608 notification_t n;
610 char *buf;
611 size_t bufsize;
613 int status;
615 /* Check if hits matched */
616 if ( (th->hits != 0) )
617 {
618 int hits = uc_get_hits(ds,vl);
619 /* The STATE_OKAY always reset hits, or if hits reaise the limit */
620 if ( (state == STATE_OKAY) || (hits > th->hits) )
621 {
622 DEBUG("ut_report_state: reset uc_get_hits = 0");
623 uc_set_hits(ds,vl,0); /* reset hit counter and notify */
624 } else {
625 DEBUG("ut_report_state: th->hits = %d, uc_get_hits = %d",th->hits,uc_get_hits(ds,vl));
626 (void) uc_inc_hits(ds,vl,1); /* increase hit counter */
627 return (0);
628 }
629 } /* end check hits */
631 state_old = uc_get_state (ds, vl);
633 /* If the state didn't change, only report if `persistent' is specified and
634 * the state is not `okay'. */
635 if (state == state_old)
636 {
637 if ((th->flags & UT_FLAG_PERSIST) == 0)
638 return (0);
639 else if (state == STATE_OKAY)
640 return (0);
641 }
643 if (state != state_old)
644 uc_set_state (ds, vl, state);
646 NOTIFICATION_INIT_VL (&n, vl, ds);
648 buf = n.message;
649 bufsize = sizeof (n.message);
651 if (state == STATE_OKAY)
652 n.severity = NOTIF_OKAY;
653 else if (state == STATE_WARNING)
654 n.severity = NOTIF_WARNING;
655 else
656 n.severity = NOTIF_FAILURE;
658 n.time = vl->time;
660 status = ssnprintf (buf, bufsize, "Host %s, plugin %s",
661 vl->host, vl->plugin);
662 buf += status;
663 bufsize -= status;
665 if (vl->plugin_instance[0] != '\0')
666 {
667 status = ssnprintf (buf, bufsize, " (instance %s)",
668 vl->plugin_instance);
669 buf += status;
670 bufsize -= status;
671 }
673 status = ssnprintf (buf, bufsize, " type %s", vl->type);
674 buf += status;
675 bufsize -= status;
677 if (vl->type_instance[0] != '\0')
678 {
679 status = ssnprintf (buf, bufsize, " (instance %s)",
680 vl->type_instance);
681 buf += status;
682 bufsize -= status;
683 }
685 plugin_notification_meta_add_string (&n, "DataSource",
686 ds->ds[ds_index].name);
687 plugin_notification_meta_add_double (&n, "CurrentValue", values[ds_index]);
688 plugin_notification_meta_add_double (&n, "WarningMin", th->warning_min);
689 plugin_notification_meta_add_double (&n, "WarningMax", th->warning_max);
690 plugin_notification_meta_add_double (&n, "FailureMin", th->failure_min);
691 plugin_notification_meta_add_double (&n, "FailureMax", th->failure_max);
693 /* Send an okay notification */
694 if (state == STATE_OKAY)
695 {
696 status = ssnprintf (buf, bufsize, ": All data sources are within range again.");
697 buf += status;
698 bufsize -= status;
699 }
700 else
701 {
702 double min;
703 double max;
705 min = (state == STATE_ERROR) ? th->failure_min : th->warning_min;
706 max = (state == STATE_ERROR) ? th->failure_max : th->warning_max;
708 if (th->flags & UT_FLAG_INVERT)
709 {
710 if (!isnan (min) && !isnan (max))
711 {
712 status = ssnprintf (buf, bufsize, ": Data source \"%s\" is currently "
713 "%f. That is within the %s region of %f%s and %f%s.",
714 ds->ds[ds_index].name, values[ds_index],
715 (state == STATE_ERROR) ? "failure" : "warning",
716 min, ((th->flags & UT_FLAG_PERCENTAGE) != 0) ? "%" : "",
717 max, ((th->flags & UT_FLAG_PERCENTAGE) != 0) ? "%" : "");
718 }
719 else
720 {
721 status = ssnprintf (buf, bufsize, ": Data source \"%s\" is currently "
722 "%f. That is %s the %s threshold of %f%s.",
723 ds->ds[ds_index].name, values[ds_index],
724 isnan (min) ? "below" : "above",
725 (state == STATE_ERROR) ? "failure" : "warning",
726 isnan (min) ? max : min,
727 ((th->flags & UT_FLAG_PERCENTAGE) != 0) ? "%" : "");
728 }
729 }
730 else /* is not inverted */
731 {
732 status = ssnprintf (buf, bufsize, ": Data source \"%s\" is currently "
733 "%f. That is %s the %s threshold of %f%s.",
734 ds->ds[ds_index].name, values[ds_index],
735 (values[ds_index] < min) ? "below" : "above",
736 (state == STATE_ERROR) ? "failure" : "warning",
737 (values[ds_index] < min) ? min : max,
738 ((th->flags & UT_FLAG_PERCENTAGE) != 0) ? "%" : "");
739 }
740 buf += status;
741 bufsize -= status;
742 }
744 plugin_dispatch_notification (&n);
746 plugin_notification_meta_free (n.meta);
747 return (0);
748 } /* }}} int ut_report_state */
750 /*
751 * int ut_check_one_data_source
752 *
753 * Checks one data source against the given threshold configuration. If the
754 * `DataSource' option is set in the threshold, and the name does NOT match,
755 * `okay' is returned. If the threshold does match, its failure and warning
756 * min and max values are checked and `failure' or `warning' is returned if
757 * appropriate.
758 * Does not fail.
759 */
760 static int ut_check_one_data_source (const data_set_t *ds,
761 const value_list_t __attribute__((unused)) *vl,
762 const threshold_t *th,
763 const gauge_t *values,
764 int ds_index)
765 { /* {{{ */
766 const char *ds_name;
767 int is_warning = 0;
768 int is_failure = 0;
769 int prev_state = STATE_OKAY;
771 /* check if this threshold applies to this data source */
772 if (ds != NULL)
773 {
774 ds_name = ds->ds[ds_index].name;
775 if ((th->data_source[0] != 0)
776 && (strcmp (ds_name, th->data_source) != 0))
777 return (STATE_OKAY);
778 }
780 if ((th->flags & UT_FLAG_INVERT) != 0)
781 {
782 is_warning--;
783 is_failure--;
784 }
786 /* XXX: This is an experimental code, not optimized, not fast, not reliable,
787 * and probably, do not work as you expect. Enjoy! :D */
788 if ( (th->hysteresis > 0) && ((prev_state = uc_get_state(ds,vl)) != STATE_OKAY) )
789 {
790 switch(prev_state)
791 {
792 case STATE_ERROR:
793 if ( (!isnan (th->failure_min) && ((th->failure_min + th->hysteresis) < values[ds_index])) ||
794 (!isnan (th->failure_max) && ((th->failure_max - th->hysteresis) > values[ds_index])) )
795 return (STATE_OKAY);
796 else
797 is_failure++;
798 case STATE_WARNING:
799 if ( (!isnan (th->warning_min) && ((th->warning_min + th->hysteresis) < values[ds_index])) ||
800 (!isnan (th->warning_max) && ((th->warning_max - th->hysteresis) > values[ds_index])) )
801 return (STATE_OKAY);
802 else
803 is_warning++;
804 }
805 }
806 else { /* no hysteresis */
807 if ((!isnan (th->failure_min) && (th->failure_min > values[ds_index]))
808 || (!isnan (th->failure_max) && (th->failure_max < values[ds_index])))
809 is_failure++;
811 if ((!isnan (th->warning_min) && (th->warning_min > values[ds_index]))
812 || (!isnan (th->warning_max) && (th->warning_max < values[ds_index])))
813 is_warning++;
814 }
816 if (is_failure != 0)
817 return (STATE_ERROR);
819 if (is_warning != 0)
820 return (STATE_WARNING);
822 return (STATE_OKAY);
823 } /* }}} int ut_check_one_data_source */
825 /*
826 * int ut_check_one_threshold
827 *
828 * Checks all data sources of a value list against the given threshold, using
829 * the ut_check_one_data_source function above. Returns the worst status,
830 * which is `okay' if nothing has failed.
831 * Returns less than zero if the data set doesn't have any data sources.
832 */
833 static int ut_check_one_threshold (const data_set_t *ds,
834 const value_list_t *vl,
835 const threshold_t *th,
836 const gauge_t *values,
837 int *ret_ds_index)
838 { /* {{{ */
839 int ret = -1;
840 int ds_index = -1;
841 int i;
842 gauge_t values_copy[ds->ds_num];
844 memcpy (values_copy, values, sizeof (values_copy));
846 if ((th->flags & UT_FLAG_PERCENTAGE) != 0)
847 {
848 int num = 0;
849 gauge_t sum=0.0;
851 if (ds->ds_num == 1)
852 {
853 WARNING ("ut_check_one_threshold: The %s type has only one data "
854 "source, but you have configured to check this as a percentage. "
855 "That doesn't make much sense, because the percentage will always "
856 "be 100%%!", ds->type);
857 }
859 /* Prepare `sum' and `num'. */
860 for (i = 0; i < ds->ds_num; i++)
861 if (!isnan (values[i]))
862 {
863 num++;
864 sum += values[i];
865 }
867 if ((num == 0) /* All data sources are undefined. */
868 || (sum == 0.0)) /* Sum is zero, cannot calculate percentage. */
869 {
870 for (i = 0; i < ds->ds_num; i++)
871 values_copy[i] = NAN;
872 }
873 else /* We can actually calculate the percentage. */
874 {
875 for (i = 0; i < ds->ds_num; i++)
876 values_copy[i] = 100.0 * values[i] / sum;
877 }
878 } /* if (UT_FLAG_PERCENTAGE) */
880 for (i = 0; i < ds->ds_num; i++)
881 {
882 int status;
884 status = ut_check_one_data_source (ds, vl, th, values_copy, i);
885 if (ret < status)
886 {
887 ret = status;
888 ds_index = i;
889 }
890 } /* for (ds->ds_num) */
892 if (ret_ds_index != NULL)
893 *ret_ds_index = ds_index;
895 return (ret);
896 } /* }}} int ut_check_one_threshold */
898 /*
899 * int ut_check_threshold (PUBLIC)
900 *
901 * Gets a list of matching thresholds and searches for the worst status by one
902 * of the thresholds. Then reports that status using the ut_report_state
903 * function above.
904 * Returns zero on success and if no threshold has been configured. Returns
905 * less than zero on failure.
906 */
907 int ut_check_threshold (const data_set_t *ds, const value_list_t *vl)
908 { /* {{{ */
909 threshold_t *th;
910 gauge_t *values;
911 int status;
913 int worst_state = -1;
914 threshold_t *worst_th = NULL;
915 int worst_ds_index = -1;
917 if (threshold_tree == NULL)
918 return (0);
920 /* Is this lock really necessary? So far, thresholds are only inserted at
921 * startup. -octo */
922 pthread_mutex_lock (&threshold_lock);
923 th = threshold_search (vl);
924 pthread_mutex_unlock (&threshold_lock);
925 if (th == NULL)
926 return (0);
928 DEBUG ("ut_check_threshold: Found matching threshold(s)");
930 values = uc_get_rate (ds, vl);
931 if (values == NULL)
932 return (0);
934 while (th != NULL)
935 {
936 int ds_index = -1;
938 status = ut_check_one_threshold (ds, vl, th, values, &ds_index);
939 if (status < 0)
940 {
941 ERROR ("ut_check_threshold: ut_check_one_threshold failed.");
942 sfree (values);
943 return (-1);
944 }
946 if (worst_state < status)
947 {
948 worst_state = status;
949 worst_th = th;
950 worst_ds_index = ds_index;
951 }
953 th = th->next;
954 } /* while (th) */
956 status = ut_report_state (ds, vl, worst_th, values,
957 worst_ds_index, worst_state);
958 if (status != 0)
959 {
960 ERROR ("ut_check_threshold: ut_report_state failed.");
961 sfree (values);
962 return (-1);
963 }
965 sfree (values);
967 return (0);
968 } /* }}} int ut_check_threshold */
970 /*
971 * int ut_check_interesting (PUBLIC)
972 *
973 * Given an identification returns
974 * 0: No threshold is defined.
975 * 1: A threshold has been found. The flag `persist' is off.
976 * 2: A threshold has been found. The flag `persist' is on.
977 * (That is, it is expected that many notifications are sent until the
978 * problem disappears.)
979 */
980 int ut_check_interesting (const char *name)
981 { /* {{{ */
982 char *name_copy = NULL;
983 char *host = NULL;
984 char *plugin = NULL;
985 char *plugin_instance = NULL;
986 char *type = NULL;
987 char *type_instance = NULL;
988 int status;
989 data_set_t ds;
990 value_list_t vl;
991 threshold_t *th;
993 /* If there is no tree nothing is interesting. */
994 if (threshold_tree == NULL)
995 return (0);
997 name_copy = strdup (name);
998 if (name_copy == NULL)
999 {
1000 ERROR ("ut_check_interesting: strdup failed.");
1001 return (-1);
1002 }
1004 status = parse_identifier (name_copy, &host,
1005 &plugin, &plugin_instance, &type, &type_instance);
1006 if (status != 0)
1007 {
1008 ERROR ("ut_check_interesting: parse_identifier failed.");
1009 sfree (name_copy);
1010 return (-1);
1011 }
1013 memset (&ds, '\0', sizeof (ds));
1014 memset (&vl, '\0', sizeof (vl));
1016 sstrncpy (vl.host, host, sizeof (vl.host));
1017 sstrncpy (vl.plugin, plugin, sizeof (vl.plugin));
1018 if (plugin_instance != NULL)
1019 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
1020 sstrncpy (ds.type, type, sizeof (ds.type));
1021 sstrncpy (vl.type, type, sizeof (vl.type));
1022 if (type_instance != NULL)
1023 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
1025 sfree (name_copy);
1026 host = plugin = plugin_instance = type = type_instance = NULL;
1028 th = threshold_search (&vl);
1029 if (th == NULL)
1030 return (0);
1031 if ((th->flags & UT_FLAG_PERSIST) == 0)
1032 return (1);
1033 return (2);
1034 } /* }}} int ut_check_interesting */
1036 int ut_search_threshold (const value_list_t *vl, /* {{{ */
1037 threshold_t *ret_threshold)
1038 {
1039 threshold_t *t;
1041 if (vl == NULL)
1042 return (EINVAL);
1044 t = threshold_search (vl);
1045 if (t == NULL)
1046 return (ENOENT);
1048 memcpy (ret_threshold, t, sizeof (*ret_threshold));
1049 ret_threshold->next = NULL;
1051 return (0);
1052 } /* }}} int ut_search_threshold */
1054 /* vim: set sw=2 ts=8 sts=2 tw=78 et fdm=marker : */