/**
* collectd - src/utils_cache.c
- * Copyright (C) 2007 Florian octo Forster
+ * Copyright (C) 2007,2008 Florian octo Forster
*
* 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
return (strcmp (a->name, b->name));
} /* int cache_compare */
+static cache_entry_t *cache_alloc (int values_num)
+{
+ cache_entry_t *ce;
+
+ ce = (cache_entry_t *) malloc (sizeof (cache_entry_t));
+ if (ce == NULL)
+ {
+ ERROR ("utils_cache: cache_alloc: malloc failed.");
+ return (NULL);
+ }
+ memset (ce, '\0', sizeof (cache_entry_t));
+ ce->values_num = values_num;
+
+ ce->values_gauge = (gauge_t *) calloc (values_num, sizeof (gauge_t));
+ ce->values_counter = (counter_t *) calloc (values_num, sizeof (counter_t));
+ if ((ce->values_gauge == NULL) || (ce->values_counter == NULL))
+ {
+ sfree (ce->values_gauge);
+ sfree (ce->values_counter);
+ sfree (ce);
+ ERROR ("utils_cache: cache_alloc: calloc failed.");
+ return (NULL);
+ }
+
+ return (ce);
+} /* cache_entry_t *cache_alloc */
+
+static void cache_free (cache_entry_t *ce)
+{
+ if (ce == NULL)
+ return;
+
+ sfree (ce->values_gauge);
+ sfree (ce->values_counter);
+ sfree (ce);
+} /* void cache_free */
+
static int uc_send_notification (const char *name)
{
cache_entry_t *ce = NULL;
notification_t n;
- memset (&n, '\0', sizeof (n));
-
name_copy = strdup (name);
if (name_copy == NULL)
{
return (-1);
}
- n.severity = NOTIF_FAILURE;
- strncpy (n.host, host, sizeof (n.host));
- n.host[sizeof (n.host) - 1] = '\0';
+ /* Copy the associative members */
+ notification_init (&n, NOTIF_FAILURE, /* host = */ NULL,
+ host, plugin, plugin_instance, type, type_instance);
sfree (name_copy);
name_copy = host = plugin = plugin_instance = type = type_instance = NULL;
pthread_mutex_lock (&cache_lock);
+ /*
+ * Set the time _after_ getting the lock because we don't know how long
+ * acquiring the lock takes and we will use this time later to decide
+ * whether or not the state is OKAY.
+ */
n.time = time (NULL);
status = c_avl_get (cache_tree, name, (void *) &ce);
return (-1);
}
- snprintf (n.message, sizeof (n.message),
+ ssnprintf (n.message, sizeof (n.message),
"%s has not been updated for %i seconds.", name,
(int) (n.time - ce->last_update));
pthread_mutex_unlock (&cache_lock);
- n.message[sizeof (n.message) - 1] = '\0';
plugin_dispatch_notification (&n);
return (0);
} /* int uc_send_notification */
+static int uc_insert (const data_set_t *ds, const value_list_t *vl,
+ const char *key)
+{
+ int i;
+ char *key_copy;
+ cache_entry_t *ce;
+
+ /* `cache_lock' has been locked by `uc_update' */
+
+ key_copy = strdup (key);
+ if (key_copy == NULL)
+ {
+ ERROR ("uc_insert: strdup failed.");
+ return (-1);
+ }
+
+ ce = cache_alloc (ds->ds_num);
+ if (ce == NULL)
+ {
+ ERROR ("uc_insert: cache_alloc (%i) failed.", ds->ds_num);
+ return (-1);
+ }
+
+ sstrncpy (ce->name, key, sizeof (ce->name));
+
+ for (i = 0; i < ds->ds_num; i++)
+ {
+ if (ds->ds[i].type == DS_TYPE_COUNTER)
+ {
+ ce->values_gauge[i] = NAN;
+ ce->values_counter[i] = vl->values[i].counter;
+ }
+ else /* if (ds->ds[i].type == DS_TYPE_GAUGE) */
+ {
+ ce->values_gauge[i] = vl->values[i].gauge;
+ }
+ } /* for (i) */
+
+ ce->last_time = vl->time;
+ ce->last_update = time (NULL);
+ ce->interval = vl->interval;
+ ce->state = STATE_OKAY;
+
+ if (c_avl_insert (cache_tree, key_copy, ce) != 0)
+ {
+ sfree (key_copy);
+ ERROR ("uc_insert: c_avl_insert failed.");
+ return (-1);
+ }
+
+ DEBUG ("uc_insert: Added %s to the cache.", key);
+ return (0);
+} /* int uc_insert */
+
int uc_init (void)
{
if (cache_tree == NULL)
else if (status == 0) /* ``service'' is uninteresting */
{
ce = NULL;
- DEBUG ("uc_check_timeout: %s is missing but ``uninteresting''", keys[i]);
- status = c_avl_remove (cache_tree, keys[i], (void *) &key, (void *) &ce);
+ DEBUG ("uc_check_timeout: %s is missing but ``uninteresting''",
+ keys[i]);
+ status = c_avl_remove (cache_tree, keys[i],
+ (void *) &key, (void *) &ce);
if (status != 0)
{
ERROR ("uc_check_timeout: c_avl_remove (%s) failed.", keys[i]);
}
sfree (keys[i]);
- sfree (ce);
+ sfree (key);
+ cache_free (ce);
+ }
+ else if (status == 1) /* persist */
+ {
+ DEBUG ("uc_check_timeout: %s is missing, sending notification.",
+ keys[i]);
+ ce->state = STATE_MISSING;
}
- else /* (status > 0); ``service'' is interesting */
+ else if (status == 2) /* do not persist */
+ {
+ if (ce->state == STATE_MISSING)
+ {
+ DEBUG ("uc_check_timeout: %s is missing but "
+ "notification has already been sent.",
+ keys[i]);
+ sfree (keys[i]);
+ }
+ else /* (ce->state != STATE_MISSING) */
+ {
+ DEBUG ("uc_check_timeout: %s is missing, sending one notification.",
+ keys[i]);
+ ce->state = STATE_MISSING;
+ }
+ }
+ else
{
- /*
- * `keys[i]' is not freed and set to NULL, so that the for-loop below
- * will send out notifications. There's nothing else to do here.
- */
- DEBUG ("uc_check_timeout: %s is missing and ``interesting''", keys[i]);
- ce->state = STATE_ERROR;
+ WARNING ("uc_check_timeout: ut_check_interesting (%s) returned "
+ "invalid status %i.",
+ keys[i], status);
}
} /* for (keys[i]) */
char name[6 * DATA_MAX_NAME_LEN];
cache_entry_t *ce = NULL;
int send_okay_notification = 0;
+ time_t update_delay = 0;
+ notification_t n;
+ int status;
+ int i;
if (FORMAT_VL (name, sizeof (name), vl, ds) != 0)
{
- ERROR ("uc_insert: FORMAT_VL failed.");
+ ERROR ("uc_update: FORMAT_VL failed.");
return (-1);
}
pthread_mutex_lock (&cache_lock);
- if (c_avl_get (cache_tree, name, (void *) &ce) == 0)
+ status = c_avl_get (cache_tree, name, (void *) &ce);
+ if (status != 0) /* entry does not yet exist */
{
- int i;
+ status = uc_insert (ds, vl, name);
+ pthread_mutex_unlock (&cache_lock);
+ return (status);
+ }
- assert (ce != NULL);
- assert (ce->values_num == ds->ds_num);
+ assert (ce != NULL);
+ assert (ce->values_num == ds->ds_num);
- if (ce->last_time >= vl->time)
- {
- pthread_mutex_unlock (&cache_lock);
- NOTICE ("uc_insert: Value too old: name = %s; value time = %u; "
- "last cache update = %u;",
- name, (unsigned int) vl->time, (unsigned int) ce->last_time);
- return (-1);
- }
+ if (ce->last_time >= vl->time)
+ {
+ pthread_mutex_unlock (&cache_lock);
+ NOTICE ("uc_update: Value too old: name = %s; value time = %u; "
+ "last cache update = %u;",
+ name, (unsigned int) vl->time, (unsigned int) ce->last_time);
+ return (-1);
+ }
- if ((ce->last_time + ce->interval) < vl->time)
- {
- send_okay_notification = vl->time - ce->last_time;
- ce->state = STATE_OKAY;
- }
+ /* Send a notification (after the lock has been released) if we switch the
+ * state from something else to `okay'. */
+ if (ce->state == STATE_MISSING)
+ {
+ send_okay_notification = 1;
+ ce->state = STATE_OKAY;
+ update_delay = time (NULL) - ce->last_update;
+ }
- for (i = 0; i < ds->ds_num; i++)
+ for (i = 0; i < ds->ds_num; i++)
+ {
+ if (ds->ds[i].type == DS_TYPE_COUNTER)
{
- if (ds->ds[i].type == DS_TYPE_COUNTER)
+ counter_t diff;
+
+ /* check if the counter has wrapped around */
+ if (vl->values[i].counter < ce->values_counter[i])
{
- counter_t diff;
-
- /* check if the counter has wrapped around */
- if (vl->values[i].counter < ce->values_counter[i])
- {
- if (ce->values_counter[i] <= 4294967295U)
- diff = (4294967295U - ce->values_counter[i])
- + vl->values[i].counter;
- else
- diff = (18446744073709551615ULL - ce->values_counter[i])
- + vl->values[i].counter;
- }
- else /* counter has NOT wrapped around */
- {
- diff = vl->values[i].counter - ce->values_counter[i];
- }
-
- ce->values_gauge[i] = ((double) diff)
- / ((double) (vl->time - ce->last_time));
- ce->values_counter[i] = vl->values[i].counter;
+ if (ce->values_counter[i] <= 4294967295U)
+ diff = (4294967295U - ce->values_counter[i])
+ + vl->values[i].counter;
+ else
+ diff = (18446744073709551615ULL - ce->values_counter[i])
+ + vl->values[i].counter;
}
- else /* if (ds->ds[i].type == DS_TYPE_GAUGE) */
+ else /* counter has NOT wrapped around */
{
- ce->values_gauge[i] = vl->values[i].gauge;
+ diff = vl->values[i].counter - ce->values_counter[i];
}
- DEBUG ("uc_insert: %s: ds[%i] = %lf", name, i, ce->values_gauge[i]);
- } /* for (i) */
- ce->last_time = vl->time;
- ce->last_update = time (NULL);
- ce->interval = vl->interval;
- }
- else /* key is not found */
- {
- int i;
- size_t ce_size = sizeof (cache_entry_t)
- + ds->ds_num * (sizeof (counter_t) + sizeof (gauge_t));
- char *key;
-
- key = strdup (name);
- if (key == NULL)
- {
- pthread_mutex_unlock (&cache_lock);
- ERROR ("uc_insert: strdup failed.");
- return (-1);
+ ce->values_gauge[i] = ((double) diff)
+ / ((double) (vl->time - ce->last_time));
+ ce->values_counter[i] = vl->values[i].counter;
}
-
- ce = (cache_entry_t *) malloc (ce_size);
- if (ce == NULL)
+ else /* if (ds->ds[i].type == DS_TYPE_GAUGE) */
{
- pthread_mutex_unlock (&cache_lock);
- ERROR ("uc_insert: malloc (%u) failed.", (unsigned int) ce_size);
- return (-1);
+ ce->values_gauge[i] = vl->values[i].gauge;
}
+ DEBUG ("uc_update: %s: ds[%i] = %lf", name, i, ce->values_gauge[i]);
+ } /* for (i) */
- memset (ce, '\0', ce_size);
+ ce->last_time = vl->time;
+ ce->last_update = time (NULL);
+ ce->interval = vl->interval;
- strncpy (ce->name, name, sizeof (ce->name));
- ce->name[sizeof (ce->name) - 1] = '\0';
+ pthread_mutex_unlock (&cache_lock);
- ce->values_num = ds->ds_num;
- ce->values_gauge = (gauge_t *) (ce + 1);
- ce->values_counter = (counter_t *) (ce->values_gauge + ce->values_num);
+ if (send_okay_notification == 0)
+ return (0);
- for (i = 0; i < ds->ds_num; i++)
- {
- if (ds->ds[i].type == DS_TYPE_COUNTER)
- {
- ce->values_gauge[i] = NAN;
- ce->values_counter[i] = vl->values[i].counter;
- }
- else /* if (ds->ds[i].type == DS_TYPE_GAUGE) */
- {
- ce->values_gauge[i] = vl->values[i].gauge;
- }
- } /* for (i) */
+ /* Do not send okay notifications for uninteresting values, i. e. values for
+ * which no threshold is configured. */
+ status = ut_check_interesting (name);
+ if (status <= 0)
+ return (0);
- ce->last_time = vl->time;
- ce->last_update = time (NULL);
- ce->interval = vl->interval;
- ce->state = STATE_OKAY;
+ /* Initialize the notification */
+ memset (&n, '\0', sizeof (n));
+ NOTIFICATION_INIT_VL (&n, vl, ds);
- if (c_avl_insert (cache_tree, key, ce) != 0)
- {
- pthread_mutex_unlock (&cache_lock);
- ERROR ("uc_insert: c_avl_insert failed.");
- return (-1);
- }
+ n.severity = NOTIF_OKAY;
+ n.time = vl->time;
- DEBUG ("uc_insert: Added %s to the cache.", name);
- } /* if (key is not found) */
+ ssnprintf (n.message, sizeof (n.message),
+ "Received a value for %s. It was missing for %u seconds.",
+ name, (unsigned int) update_delay);
- pthread_mutex_unlock (&cache_lock);
+ plugin_dispatch_notification (&n);
- /* Do not send okay notifications for uninteresting values, i. e. values for
- * which no threshold is configured. */
- if (send_okay_notification > 0)
- {
- int status;
+ return (0);
+} /* int uc_update */
- status = ut_check_interesting (name);
- if (status <= 0)
- send_okay_notification = 0;
- }
+int uc_get_rate_by_name (const char *name, gauge_t **ret_values, size_t *ret_values_num)
+{
+ gauge_t *ret = NULL;
+ size_t ret_num = 0;
+ cache_entry_t *ce = NULL;
+ int status = 0;
+
+ pthread_mutex_lock (&cache_lock);
- if (send_okay_notification > 0)
+ if (c_avl_get (cache_tree, name, (void *) &ce) == 0)
{
- notification_t n;
- memset (&n, '\0', sizeof (n));
+ assert (ce != NULL);
- n.severity = NOTIF_OKAY;
- strncpy (n.host, vl->host, sizeof (n.host));
- n.host[sizeof (n.host) - 1] = '\0';
- n.time = vl->time;
+ ret_num = ce->values_num;
+ ret = (gauge_t *) malloc (ret_num * sizeof (gauge_t));
+ if (ret == NULL)
+ {
+ ERROR ("utils_cache: uc_get_rate_by_name: malloc failed.");
+ status = -1;
+ }
+ else
+ {
+ memcpy (ret, ce->values_gauge, ret_num * sizeof (gauge_t));
+ }
+ }
+ else
+ {
+ DEBUG ("utils_cache: uc_get_rate_by_name: No such value: %s", name);
+ status = -1;
+ }
- snprintf (n.message, sizeof (n.message),
- "Received a value for %s. It was missing for %i seconds.",
- name, send_okay_notification);
- n.message[sizeof (n.message) - 1] = '\0';
+ pthread_mutex_unlock (&cache_lock);
- plugin_dispatch_notification (&n);
+ if (status == 0)
+ {
+ *ret_values = ret;
+ *ret_values_num = ret_num;
}
- return (0);
-} /* int uc_insert */
+ return (status);
+} /* gauge_t *uc_get_rate_by_name */
gauge_t *uc_get_rate (const data_set_t *ds, const value_list_t *vl)
{
char name[6 * DATA_MAX_NAME_LEN];
gauge_t *ret = NULL;
- cache_entry_t *ce = NULL;
+ size_t ret_num = 0;
+ int status;
if (FORMAT_VL (name, sizeof (name), vl, ds) != 0)
{
return (NULL);
}
+ status = uc_get_rate_by_name (name, &ret, &ret_num);
+ if (status != 0)
+ return (NULL);
+
+ /* This is important - the caller has no other way of knowing how many
+ * values are returned. */
+ if (ret_num != ds->ds_num)
+ {
+ ERROR ("utils_cache: uc_get_rate: ds[%s] has %i values, "
+ "but uc_get_rate_by_name returned %zu.",
+ ds->type, ds->ds_num, ret_num);
+ sfree (ret);
+ return (NULL);
+ }
+
+ return (ret);
+} /* gauge_t *uc_get_rate */
+
+int uc_get_names (char ***ret_names, time_t **ret_times, size_t *ret_number)
+{
+ c_avl_iterator_t *iter;
+ char *key;
+ cache_entry_t *value;
+
+ char **names = NULL;
+ time_t *times = NULL;
+ size_t number = 0;
+
+ int status = 0;
+
+ if ((ret_names == NULL) || (ret_number == NULL))
+ return (-1);
+
pthread_mutex_lock (&cache_lock);
- if (c_avl_get (cache_tree, name, (void *) &ce) == 0)
+ iter = c_avl_get_iterator (cache_tree);
+ while (c_avl_iterator_next (iter, (void *) &key, (void *) &value) == 0)
{
- assert (ce != NULL);
- assert (ce->values_num == ds->ds_num);
+ char **temp;
- ret = (gauge_t *) malloc (ce->values_num * sizeof (gauge_t));
- if (ret == NULL)
+ if (ret_times != NULL)
+ {
+ time_t *tmp_times;
+
+ tmp_times = (time_t *) realloc (times, sizeof (time_t) * (number + 1));
+ if (tmp_times == NULL)
+ {
+ status = -1;
+ break;
+ }
+ times = tmp_times;
+ times[number] = value->last_time;
+ }
+
+ temp = (char **) realloc (names, sizeof (char *) * (number + 1));
+ if (temp == NULL)
{
- ERROR ("uc_get_rate: malloc failed.");
+ status = -1;
+ break;
}
- else
+ names = temp;
+ names[number] = strdup (key);
+ if (names[number] == NULL)
{
- memcpy (ret, ce->values_gauge, ce->values_num * sizeof (gauge_t));
+ status = -1;
+ break;
}
- }
+ number++;
+ } /* while (c_avl_iterator_next) */
+ c_avl_iterator_destroy (iter);
pthread_mutex_unlock (&cache_lock);
- return (ret);
-} /* gauge_t *uc_get_rate */
+ if (status != 0)
+ {
+ size_t i;
+
+ for (i = 0; i < number; i++)
+ {
+ sfree (names[i]);
+ }
+ sfree (names);
+
+ return (-1);
+ }
+
+ *ret_names = names;
+ if (ret_times != NULL)
+ *ret_times = times;
+ *ret_number = number;
+
+ return (0);
+} /* int uc_get_names */
int uc_get_state (const data_set_t *ds, const value_list_t *vl)
{
cache_entry_t *ce = NULL;
int ret = -1;
- if (state < STATE_OKAY)
- state = STATE_OKAY;
- if (state > STATE_ERROR)
- state = STATE_ERROR;
-
if (FORMAT_VL (name, sizeof (name), vl, ds) != 0)
{
ERROR ("uc_get_state: FORMAT_VL failed.");
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