/**
* collectd - src/utils_threshold.c
- * Copyright (C) 2007-2009 Florian octo Forster
- * Copyright (C) 2008-2009 Sebastian Harl
- * Copyright (C) 2009 Andrés J. Díaz
+ * Copyright (C) 2014 Pierre-Yves Ritschard
*
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; only version 2 of the License is applicable.
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
*
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
*
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * Author:
- * Florian octo Forster <octo at verplant.org>
- * Sebastian Harl <sh at tokkee.org>
- * Andrés J. Díaz <ajdiaz at connectical.com>
+ * Authors:
+ * Pierre-Yves Ritschard <pyr at spootnik.org>
**/
#include "collectd.h"
#include "common.h"
-#include "plugin.h"
#include "utils_avltree.h"
-#include "utils_cache.h"
#include "utils_threshold.h"
-#include <assert.h>
#include <pthread.h>
/*
- * Private data structures
+ * Exported symbols
* {{{ */
-#define UT_FLAG_INVERT 0x01
-#define UT_FLAG_PERSIST 0x02
-#define UT_FLAG_PERCENTAGE 0x04
+c_avl_tree_t *threshold_tree = NULL;
+pthread_mutex_t threshold_lock = PTHREAD_MUTEX_INITIALIZER;
/* }}} */
/*
- * Private (static) variables
- * {{{ */
-static c_avl_tree_t *threshold_tree = NULL;
-static pthread_mutex_t threshold_lock = PTHREAD_MUTEX_INITIALIZER;
-/* }}} */
-
-/*
- * Threshold management
- * ====================
- * The following functions add, delete, search, etc. configured thresholds to
- * the underlying AVL trees.
- * {{{ */
-static threshold_t *threshold_get (const char *hostname,
+ * threshold_t *threshold_get
+ *
+ * Retrieve one specific threshold configuration. For looking up a threshold
+ * matching a value_list_t, see "threshold_search" below. Returns NULL if the
+ * specified threshold doesn't exist.
+ */
+threshold_t *threshold_get (const char *hostname,
const char *plugin, const char *plugin_instance,
const char *type, const char *type_instance)
-{
+{ /* {{{ */
char name[6 * DATA_MAX_NAME_LEN];
threshold_t *th = NULL;
return (th);
else
return (NULL);
-} /* threshold_t *threshold_get */
-
-static int ut_threshold_add (const threshold_t *th)
-{
- char name[6 * DATA_MAX_NAME_LEN];
- char *name_copy;
- threshold_t *th_copy;
- threshold_t *th_ptr;
- int status = 0;
-
- if (format_name (name, sizeof (name), th->host,
- th->plugin, th->plugin_instance,
- th->type, th->type_instance) != 0)
- {
- ERROR ("ut_threshold_add: format_name failed.");
- return (-1);
- }
-
- name_copy = strdup (name);
- if (name_copy == NULL)
- {
- ERROR ("ut_threshold_add: strdup failed.");
- return (-1);
- }
-
- th_copy = (threshold_t *) malloc (sizeof (threshold_t));
- if (th_copy == NULL)
- {
- sfree (name_copy);
- ERROR ("ut_threshold_add: malloc failed.");
- return (-1);
- }
- memcpy (th_copy, th, sizeof (threshold_t));
- th_ptr = NULL;
-
- DEBUG ("ut_threshold_add: Adding entry `%s'", name);
-
- pthread_mutex_lock (&threshold_lock);
-
- th_ptr = threshold_get (th->host, th->plugin, th->plugin_instance,
- th->type, th->type_instance);
-
- while ((th_ptr != NULL) && (th_ptr->next != NULL))
- th_ptr = th_ptr->next;
-
- if (th_ptr == NULL) /* no such threshold yet */
- {
- status = c_avl_insert (threshold_tree, name_copy, th_copy);
- }
- else /* th_ptr points to the last threshold in the list */
- {
- th_ptr->next = th_copy;
- /* name_copy isn't needed */
- sfree (name_copy);
- }
-
- pthread_mutex_unlock (&threshold_lock);
-
- if (status != 0)
- {
- ERROR ("ut_threshold_add: c_avl_insert (%s) failed.", name);
- sfree (name_copy);
- sfree (th_copy);
- }
-
- return (status);
-} /* int ut_threshold_add */
-/*
- * End of the threshold management functions
- * }}} */
+} /* }}} threshold_t *threshold_get */
/*
- * Configuration
- * =============
- * The following approximately two hundred functions are used to handle the
- * configuration and fill the threshold list.
- * {{{ */
-static int ut_config_type_datasource (threshold_t *th, oconfig_item_t *ci)
-{
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_STRING))
- {
- WARNING ("threshold values: The `DataSource' option needs exactly one "
- "string argument.");
- return (-1);
- }
-
- sstrncpy (th->data_source, ci->values[0].value.string,
- sizeof (th->data_source));
-
- return (0);
-} /* int ut_config_type_datasource */
-
-static int ut_config_type_instance (threshold_t *th, oconfig_item_t *ci)
-{
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_STRING))
- {
- WARNING ("threshold values: The `Instance' option needs exactly one "
- "string argument.");
- return (-1);
- }
-
- sstrncpy (th->type_instance, ci->values[0].value.string,
- sizeof (th->type_instance));
-
- return (0);
-} /* int ut_config_type_instance */
-
-static int ut_config_type_max (threshold_t *th, oconfig_item_t *ci)
-{
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
- {
- WARNING ("threshold values: The `%s' option needs exactly one "
- "number argument.", ci->key);
- return (-1);
- }
-
- if (strcasecmp (ci->key, "WarningMax") == 0)
- th->warning_max = ci->values[0].value.number;
- else
- th->failure_max = ci->values[0].value.number;
-
- return (0);
-} /* int ut_config_type_max */
-
-static int ut_config_type_min (threshold_t *th, oconfig_item_t *ci)
-{
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
- {
- WARNING ("threshold values: The `%s' option needs exactly one "
- "number argument.", ci->key);
- return (-1);
- }
-
- if (strcasecmp (ci->key, "WarningMin") == 0)
- th->warning_min = ci->values[0].value.number;
- else
- th->failure_min = ci->values[0].value.number;
-
- return (0);
-} /* int ut_config_type_min */
-
-static int ut_config_type_invert (threshold_t *th, oconfig_item_t *ci)
-{
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
- {
- WARNING ("threshold values: The `Invert' option needs exactly one "
- "boolean argument.");
- return (-1);
- }
-
- if (ci->values[0].value.boolean)
- th->flags |= UT_FLAG_INVERT;
- else
- th->flags &= ~UT_FLAG_INVERT;
-
- return (0);
-} /* int ut_config_type_invert */
-
-static int ut_config_type_persist (threshold_t *th, oconfig_item_t *ci)
-{
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
- {
- WARNING ("threshold values: The `Persist' option needs exactly one "
- "boolean argument.");
- return (-1);
- }
-
- if (ci->values[0].value.boolean)
- th->flags |= UT_FLAG_PERSIST;
- else
- th->flags &= ~UT_FLAG_PERSIST;
-
- return (0);
-} /* int ut_config_type_persist */
-
-static int ut_config_type_percentage(threshold_t *th, oconfig_item_t *ci)
-{
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_BOOLEAN))
- {
- WARNING ("threshold values: The `Percentage' option needs exactly one "
- "boolean argument.");
- return (-1);
- }
-
- if (ci->values[0].value.boolean)
- th->flags |= UT_FLAG_PERCENTAGE;
- else
- th->flags &= ~UT_FLAG_PERCENTAGE;
-
- return (0);
-} /* int ut_config_type_percentage */
-
-static int ut_config_type_hits (threshold_t *th, oconfig_item_t *ci)
-{
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
- {
- WARNING ("threshold values: The `%s' option needs exactly one "
- "number argument.", ci->key);
- return (-1);
- }
-
- th->hits = ci->values[0].value.number;
-
- return (0);
-} /* int ut_config_type_hits */
-
-static int ut_config_type_hysteresis (threshold_t *th, oconfig_item_t *ci)
-{
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_NUMBER))
- {
- WARNING ("threshold values: The `%s' option needs exactly one "
- "number argument.", ci->key);
- return (-1);
- }
-
- th->hysteresis = ci->values[0].value.number;
-
- return (0);
-} /* int ut_config_type_hysteresis */
-
-static int ut_config_type (const threshold_t *th_orig, oconfig_item_t *ci)
-{
- int i;
- threshold_t th;
- int status = 0;
-
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_STRING))
- {
- WARNING ("threshold values: The `Type' block needs exactly one string "
- "argument.");
- return (-1);
- }
-
- if (ci->children_num < 1)
- {
- WARNING ("threshold values: The `Type' block needs at least one option.");
- return (-1);
- }
-
- memcpy (&th, th_orig, sizeof (th));
- sstrncpy (th.type, ci->values[0].value.string, sizeof (th.type));
-
- th.warning_min = NAN;
- th.warning_max = NAN;
- th.failure_min = NAN;
- th.failure_max = NAN;
- th.hits = 0;
- th.hysteresis = 0;
-
- for (i = 0; i < ci->children_num; i++)
- {
- oconfig_item_t *option = ci->children + i;
- status = 0;
-
- if (strcasecmp ("Instance", option->key) == 0)
- status = ut_config_type_instance (&th, option);
- else if (strcasecmp ("DataSource", option->key) == 0)
- status = ut_config_type_datasource (&th, option);
- else if ((strcasecmp ("WarningMax", option->key) == 0)
- || (strcasecmp ("FailureMax", option->key) == 0))
- status = ut_config_type_max (&th, option);
- else if ((strcasecmp ("WarningMin", option->key) == 0)
- || (strcasecmp ("FailureMin", option->key) == 0))
- status = ut_config_type_min (&th, option);
- else if (strcasecmp ("Invert", option->key) == 0)
- status = ut_config_type_invert (&th, option);
- else if (strcasecmp ("Persist", option->key) == 0)
- status = ut_config_type_persist (&th, option);
- else if (strcasecmp ("Percentage", option->key) == 0)
- status = ut_config_type_percentage (&th, option);
- else if (strcasecmp ("Hits", option->key) == 0)
- status = ut_config_type_hits (&th, option);
- else if (strcasecmp ("Hysteresis", option->key) == 0)
- status = ut_config_type_hysteresis (&th, option);
- else
- {
- WARNING ("threshold values: Option `%s' not allowed inside a `Type' "
- "block.", option->key);
- status = -1;
- }
-
- if (status != 0)
- break;
- }
-
- if (status == 0)
- {
- status = ut_threshold_add (&th);
- }
-
- return (status);
-} /* int ut_config_type */
-
-static int ut_config_plugin_instance (threshold_t *th, oconfig_item_t *ci)
-{
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_STRING))
- {
- WARNING ("threshold values: The `Instance' option needs exactly one "
- "string argument.");
- return (-1);
- }
-
- sstrncpy (th->plugin_instance, ci->values[0].value.string,
- sizeof (th->plugin_instance));
-
- return (0);
-} /* int ut_config_plugin_instance */
-
-static int ut_config_plugin (const threshold_t *th_orig, oconfig_item_t *ci)
-{
- int i;
- threshold_t th;
- int status = 0;
-
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_STRING))
- {
- WARNING ("threshold values: The `Plugin' block needs exactly one string "
- "argument.");
- return (-1);
- }
-
- if (ci->children_num < 1)
- {
- WARNING ("threshold values: The `Plugin' block needs at least one nested "
- "block.");
- return (-1);
- }
-
- memcpy (&th, th_orig, sizeof (th));
- sstrncpy (th.plugin, ci->values[0].value.string, sizeof (th.plugin));
-
- for (i = 0; i < ci->children_num; i++)
- {
- oconfig_item_t *option = ci->children + i;
- status = 0;
-
- if (strcasecmp ("Type", option->key) == 0)
- status = ut_config_type (&th, option);
- else if (strcasecmp ("Instance", option->key) == 0)
- status = ut_config_plugin_instance (&th, option);
- else
- {
- WARNING ("threshold values: Option `%s' not allowed inside a `Plugin' "
- "block.", option->key);
- status = -1;
- }
-
- if (status != 0)
- break;
- }
-
- return (status);
-} /* int ut_config_plugin */
-
-static int ut_config_host (const threshold_t *th_orig, oconfig_item_t *ci)
-{
- int i;
- threshold_t th;
- int status = 0;
-
- if ((ci->values_num != 1)
- || (ci->values[0].type != OCONFIG_TYPE_STRING))
- {
- WARNING ("threshold values: The `Host' block needs exactly one string "
- "argument.");
- return (-1);
- }
-
- if (ci->children_num < 1)
- {
- WARNING ("threshold values: The `Host' block needs at least one nested "
- "block.");
- return (-1);
- }
-
- memcpy (&th, th_orig, sizeof (th));
- sstrncpy (th.host, ci->values[0].value.string, sizeof (th.host));
-
- for (i = 0; i < ci->children_num; i++)
- {
- oconfig_item_t *option = ci->children + i;
- status = 0;
-
- if (strcasecmp ("Type", option->key) == 0)
- status = ut_config_type (&th, option);
- else if (strcasecmp ("Plugin", option->key) == 0)
- status = ut_config_plugin (&th, option);
- else
- {
- WARNING ("threshold values: Option `%s' not allowed inside a `Host' "
- "block.", option->key);
- status = -1;
- }
-
- if (status != 0)
- break;
- }
-
- return (status);
-} /* int ut_config_host */
-
-int ut_config (const oconfig_item_t *ci)
-{
- int i;
- int status = 0;
-
- threshold_t th;
-
- if (ci->values_num != 0)
- {
- ERROR ("threshold values: The `Threshold' block may not have any "
- "arguments.");
- return (-1);
- }
-
- if (threshold_tree == NULL)
- {
- threshold_tree = c_avl_create ((void *) strcmp);
- if (threshold_tree == NULL)
- {
- ERROR ("ut_config: c_avl_create failed.");
- return (-1);
- }
- }
-
- memset (&th, '\0', sizeof (th));
- th.warning_min = NAN;
- th.warning_max = NAN;
- th.failure_min = NAN;
- th.failure_max = NAN;
-
- th.hits = 0;
- th.hysteresis = 0;
-
- for (i = 0; i < ci->children_num; i++)
- {
- oconfig_item_t *option = ci->children + i;
- status = 0;
-
- if (strcasecmp ("Type", option->key) == 0)
- status = ut_config_type (&th, option);
- else if (strcasecmp ("Plugin", option->key) == 0)
- status = ut_config_plugin (&th, option);
- else if (strcasecmp ("Host", option->key) == 0)
- status = ut_config_host (&th, option);
- else
- {
- WARNING ("threshold values: Option `%s' not allowed here.", option->key);
- status = -1;
- }
-
- if (status != 0)
- break;
- }
-
- return (status);
-} /* int um_config */
-/*
- * End of the functions used to configure threshold values.
+ * threshold_t *threshold_search
+ *
+ * Searches for a threshold configuration using all the possible variations of
+ * "Host", "Plugin" and "Type" blocks. Returns NULL if no threshold could be
+ * found.
+ * XXX: This is likely the least efficient function in collectd.
*/
-/* }}} */
-
-static threshold_t *threshold_search (const value_list_t *vl)
-{
+threshold_t *threshold_search (const value_list_t *vl)
+{ /* {{{ */
threshold_t *th;
if ((th = threshold_get (vl->host, vl->plugin, vl->plugin_instance,
return (th);
return (NULL);
-} /* threshold_t *threshold_search */
-
-/*
- * int ut_report_state
- *
- * Checks if the `state' differs from the old state and creates a notification
- * if appropriate.
- * Does not fail.
- */
-static int ut_report_state (const data_set_t *ds,
- const value_list_t *vl,
- const threshold_t *th,
- const gauge_t *values,
- int ds_index,
- int state)
-{ /* {{{ */
- int state_old;
- notification_t n;
-
- char *buf;
- size_t bufsize;
-
- int status;
-
- /* Check if hits matched */
- if ( (th->hits != 0) )
- {
- int hits = uc_get_hits(ds,vl);
- /* The STATE_OKAY always reset hits, or if hits reaise the limit */
- if ( (state == STATE_OKAY) || (hits > th->hits) )
- {
- DEBUG("ut_report_state: reset uc_get_hits = 0");
- uc_set_hits(ds,vl,0); /* reset hit counter and notify */
- } else {
- DEBUG("ut_report_state: th->hits = %d, uc_get_hits = %d",th->hits,uc_get_hits(ds,vl));
- (void) uc_inc_hits(ds,vl,1); /* increase hit counter */
- return (0);
- }
- } /* end check hits */
-
- state_old = uc_get_state (ds, vl);
-
- /* If the state didn't change, only report if `persistent' is specified and
- * the state is not `okay'. */
- if (state == state_old)
- {
- if ((th->flags & UT_FLAG_PERSIST) == 0)
- return (0);
- else if (state == STATE_OKAY)
- return (0);
- }
-
- if (state != state_old)
- uc_set_state (ds, vl, state);
-
- NOTIFICATION_INIT_VL (&n, vl, ds);
-
- buf = n.message;
- bufsize = sizeof (n.message);
-
- if (state == STATE_OKAY)
- n.severity = NOTIF_OKAY;
- else if (state == STATE_WARNING)
- n.severity = NOTIF_WARNING;
- else
- n.severity = NOTIF_FAILURE;
-
- n.time = vl->time;
-
- status = ssnprintf (buf, bufsize, "Host %s, plugin %s",
- vl->host, vl->plugin);
- buf += status;
- bufsize -= status;
-
- if (vl->plugin_instance[0] != '\0')
- {
- status = ssnprintf (buf, bufsize, " (instance %s)",
- vl->plugin_instance);
- buf += status;
- bufsize -= status;
- }
-
- status = ssnprintf (buf, bufsize, " type %s", vl->type);
- buf += status;
- bufsize -= status;
-
- if (vl->type_instance[0] != '\0')
- {
- status = ssnprintf (buf, bufsize, " (instance %s)",
- vl->type_instance);
- buf += status;
- bufsize -= status;
- }
-
- plugin_notification_meta_add_string (&n, "DataSource",
- ds->ds[ds_index].name);
- plugin_notification_meta_add_double (&n, "CurrentValue", values[ds_index]);
- plugin_notification_meta_add_double (&n, "WarningMin", th->warning_min);
- plugin_notification_meta_add_double (&n, "WarningMax", th->warning_max);
- plugin_notification_meta_add_double (&n, "FailureMin", th->failure_min);
- plugin_notification_meta_add_double (&n, "FailureMax", th->failure_max);
-
- /* Send an okay notification */
- if (state == STATE_OKAY)
- {
- status = ssnprintf (buf, bufsize, ": All data sources are within range again.");
- buf += status;
- bufsize -= status;
- }
- else
- {
- double min;
- double max;
-
- min = (state == STATE_ERROR) ? th->failure_min : th->warning_min;
- max = (state == STATE_ERROR) ? th->failure_max : th->warning_max;
-
- if (th->flags & UT_FLAG_INVERT)
- {
- if (!isnan (min) && !isnan (max))
- {
- status = ssnprintf (buf, bufsize, ": Data source \"%s\" is currently "
- "%f. That is within the %s region of %f%s and %f%s.",
- ds->ds[ds_index].name, values[ds_index],
- (state == STATE_ERROR) ? "failure" : "warning",
- min, ((th->flags & UT_FLAG_PERCENTAGE) != 0) ? "%" : "",
- max, ((th->flags & UT_FLAG_PERCENTAGE) != 0) ? "%" : "");
- }
- else
- {
- status = ssnprintf (buf, bufsize, ": Data source \"%s\" is currently "
- "%f. That is %s the %s threshold of %f%s.",
- ds->ds[ds_index].name, values[ds_index],
- isnan (min) ? "below" : "above",
- (state == STATE_ERROR) ? "failure" : "warning",
- isnan (min) ? max : min,
- ((th->flags & UT_FLAG_PERCENTAGE) != 0) ? "%" : "");
- }
- }
- else /* is not inverted */
- {
- status = ssnprintf (buf, bufsize, ": Data source \"%s\" is currently "
- "%f. That is %s the %s threshold of %f%s.",
- ds->ds[ds_index].name, values[ds_index],
- (values[ds_index] < min) ? "below" : "above",
- (state == STATE_ERROR) ? "failure" : "warning",
- (values[ds_index] < min) ? min : max,
- ((th->flags & UT_FLAG_PERCENTAGE) != 0) ? "%" : "");
- }
- buf += status;
- bufsize -= status;
- }
-
- plugin_dispatch_notification (&n);
-
- plugin_notification_meta_free (n.meta);
- return (0);
-} /* }}} int ut_report_state */
-
-/*
- * int ut_check_one_data_source
- *
- * Checks one data source against the given threshold configuration. If the
- * `DataSource' option is set in the threshold, and the name does NOT match,
- * `okay' is returned. If the threshold does match, its failure and warning
- * min and max values are checked and `failure' or `warning' is returned if
- * appropriate.
- * Does not fail.
- */
-static int ut_check_one_data_source (const data_set_t *ds,
- const value_list_t __attribute__((unused)) *vl,
- const threshold_t *th,
- const gauge_t *values,
- int ds_index)
-{ /* {{{ */
- const char *ds_name;
- int is_warning = 0;
- int is_failure = 0;
- int prev_state = STATE_OKAY;
-
- /* check if this threshold applies to this data source */
- if (ds != NULL)
- {
- ds_name = ds->ds[ds_index].name;
- if ((th->data_source[0] != 0)
- && (strcmp (ds_name, th->data_source) != 0))
- return (STATE_OKAY);
- }
-
- if ((th->flags & UT_FLAG_INVERT) != 0)
- {
- is_warning--;
- is_failure--;
- }
-
- /* XXX: This is an experimental code, not optimized, not fast, not reliable,
- * and probably, do not work as you expect. Enjoy! :D */
- if ( (th->hysteresis > 0) && ((prev_state = uc_get_state(ds,vl)) != STATE_OKAY) )
- {
- switch(prev_state)
- {
- case STATE_ERROR:
- if ( (!isnan (th->failure_min) && ((th->failure_min + th->hysteresis) < values[ds_index])) ||
- (!isnan (th->failure_max) && ((th->failure_max - th->hysteresis) > values[ds_index])) )
- return (STATE_OKAY);
- else
- is_failure++;
- case STATE_WARNING:
- if ( (!isnan (th->warning_min) && ((th->warning_min + th->hysteresis) < values[ds_index])) ||
- (!isnan (th->warning_max) && ((th->warning_max - th->hysteresis) > values[ds_index])) )
- return (STATE_OKAY);
- else
- is_warning++;
- }
- }
- else { /* no hysteresis */
- if ((!isnan (th->failure_min) && (th->failure_min > values[ds_index]))
- || (!isnan (th->failure_max) && (th->failure_max < values[ds_index])))
- is_failure++;
-
- if ((!isnan (th->warning_min) && (th->warning_min > values[ds_index]))
- || (!isnan (th->warning_max) && (th->warning_max < values[ds_index])))
- is_warning++;
- }
-
- if (is_failure != 0)
- return (STATE_ERROR);
-
- if (is_warning != 0)
- return (STATE_WARNING);
-
- return (STATE_OKAY);
-} /* }}} int ut_check_one_data_source */
-
-/*
- * int ut_check_one_threshold
- *
- * Checks all data sources of a value list against the given threshold, using
- * the ut_check_one_data_source function above. Returns the worst status,
- * which is `okay' if nothing has failed.
- * Returns less than zero if the data set doesn't have any data sources.
- */
-static int ut_check_one_threshold (const data_set_t *ds,
- const value_list_t *vl,
- const threshold_t *th,
- const gauge_t *values,
- int *ret_ds_index)
-{ /* {{{ */
- int ret = -1;
- int ds_index = -1;
- int i;
- gauge_t values_copy[ds->ds_num];
-
- memcpy (values_copy, values, sizeof (values_copy));
-
- if ((th->flags & UT_FLAG_PERCENTAGE) != 0)
- {
- int num = 0;
- gauge_t sum=0.0;
-
- if (ds->ds_num == 1)
- {
- WARNING ("ut_check_one_threshold: The %s type has only one data "
- "source, but you have configured to check this as a percentage. "
- "That doesn't make much sense, because the percentage will always "
- "be 100%%!", ds->type);
- }
-
- /* Prepare `sum' and `num'. */
- for (i = 0; i < ds->ds_num; i++)
- if (!isnan (values[i]))
- {
- num++;
- sum += values[i];
- }
-
- if ((num == 0) /* All data sources are undefined. */
- || (sum == 0.0)) /* Sum is zero, cannot calculate percentage. */
- {
- for (i = 0; i < ds->ds_num; i++)
- values_copy[i] = NAN;
- }
- else /* We can actually calculate the percentage. */
- {
- for (i = 0; i < ds->ds_num; i++)
- values_copy[i] = 100.0 * values[i] / sum;
- }
- } /* if (UT_FLAG_PERCENTAGE) */
-
- for (i = 0; i < ds->ds_num; i++)
- {
- int status;
-
- status = ut_check_one_data_source (ds, vl, th, values_copy, i);
- if (ret < status)
- {
- ret = status;
- ds_index = i;
- }
- } /* for (ds->ds_num) */
-
- if (ret_ds_index != NULL)
- *ret_ds_index = ds_index;
-
- return (ret);
-} /* }}} int ut_check_one_threshold */
-
-/*
- * int ut_check_threshold (PUBLIC)
- *
- * Gets a list of matching thresholds and searches for the worst status by one
- * of the thresholds. Then reports that status using the ut_report_state
- * function above.
- * Returns zero on success and if no threshold has been configured. Returns
- * less than zero on failure.
- */
-int ut_check_threshold (const data_set_t *ds, const value_list_t *vl)
-{ /* {{{ */
- threshold_t *th;
- gauge_t *values;
- int status;
-
- int worst_state = -1;
- threshold_t *worst_th = NULL;
- int worst_ds_index = -1;
-
- if (threshold_tree == NULL)
- return (0);
-
- /* Is this lock really necessary? So far, thresholds are only inserted at
- * startup. -octo */
- pthread_mutex_lock (&threshold_lock);
- th = threshold_search (vl);
- pthread_mutex_unlock (&threshold_lock);
- if (th == NULL)
- return (0);
-
- DEBUG ("ut_check_threshold: Found matching threshold(s)");
-
- values = uc_get_rate (ds, vl);
- if (values == NULL)
- return (0);
-
- while (th != NULL)
- {
- int ds_index = -1;
-
- status = ut_check_one_threshold (ds, vl, th, values, &ds_index);
- if (status < 0)
- {
- ERROR ("ut_check_threshold: ut_check_one_threshold failed.");
- sfree (values);
- return (-1);
- }
-
- if (worst_state < status)
- {
- worst_state = status;
- worst_th = th;
- worst_ds_index = ds_index;
- }
-
- th = th->next;
- } /* while (th) */
-
- status = ut_report_state (ds, vl, worst_th, values,
- worst_ds_index, worst_state);
- if (status != 0)
- {
- ERROR ("ut_check_threshold: ut_report_state failed.");
- sfree (values);
- return (-1);
- }
-
- sfree (values);
-
- return (0);
-} /* }}} int ut_check_threshold */
-
-/*
- * int ut_check_interesting (PUBLIC)
- *
- * Given an identification returns
- * 0: No threshold is defined.
- * 1: A threshold has been found. The flag `persist' is off.
- * 2: A threshold has been found. The flag `persist' is on.
- * (That is, it is expected that many notifications are sent until the
- * problem disappears.)
- */
-int ut_check_interesting (const char *name)
-{ /* {{{ */
- char *name_copy = NULL;
- char *host = NULL;
- char *plugin = NULL;
- char *plugin_instance = NULL;
- char *type = NULL;
- char *type_instance = NULL;
- int status;
- data_set_t ds;
- value_list_t vl;
- threshold_t *th;
-
- /* If there is no tree nothing is interesting. */
- if (threshold_tree == NULL)
- return (0);
-
- name_copy = strdup (name);
- if (name_copy == NULL)
- {
- ERROR ("ut_check_interesting: strdup failed.");
- return (-1);
- }
-
- status = parse_identifier (name_copy, &host,
- &plugin, &plugin_instance, &type, &type_instance);
- if (status != 0)
- {
- ERROR ("ut_check_interesting: parse_identifier failed.");
- sfree (name_copy);
- return (-1);
- }
-
- memset (&ds, '\0', sizeof (ds));
- memset (&vl, '\0', sizeof (vl));
-
- sstrncpy (vl.host, host, sizeof (vl.host));
- sstrncpy (vl.plugin, plugin, sizeof (vl.plugin));
- if (plugin_instance != NULL)
- sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
- sstrncpy (ds.type, type, sizeof (ds.type));
- sstrncpy (vl.type, type, sizeof (vl.type));
- if (type_instance != NULL)
- sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
-
- sfree (name_copy);
- host = plugin = plugin_instance = type = type_instance = NULL;
-
- th = threshold_search (&vl);
- if (th == NULL)
- return (0);
- if ((th->flags & UT_FLAG_PERSIST) == 0)
- return (1);
- return (2);
-} /* }}} int ut_check_interesting */
+} /* }}} threshold_t *threshold_search */
int ut_search_threshold (const value_list_t *vl, /* {{{ */
threshold_t *ret_threshold)
if (vl == NULL)
return (EINVAL);
+ /* Is this lock really necessary? */
+ pthread_mutex_lock (&threshold_lock);
t = threshold_search (vl);
- if (t == NULL)
+ if (t == NULL) {
+ pthread_mutex_unlock (&threshold_lock);
return (ENOENT);
+ }
memcpy (ret_threshold, t, sizeof (*ret_threshold));
+ pthread_mutex_unlock (&threshold_lock);
+
ret_threshold->next = NULL;
return (0);
} /* }}} int ut_search_threshold */
-/* vim: set sw=2 ts=8 sts=2 tw=78 et fdm=marker : */
+