diff --git a/src/utils_cache.c b/src/utils_cache.c
index 5ecb83cfa015cc6b4cb606c1ad499676d6ebb2f6..b936ace6fb1650dd9067b0a49b7f11740c831de1 100644 (file)
--- a/src/utils_cache.c
+++ b/src/utils_cache.c
#include "common.h"
#include "plugin.h"
#include "utils_avltree.h"
+#include "utils_threshold.h"
#include <assert.h>
#include <pthread.h>
int values_num;
gauge_t *values_gauge;
counter_t *values_counter;
+ /* Time contained in the package
+ * (for calculating rates) */
+ time_t last_time;
+ /* Time according to the local clock
+ * (for purging old entries) */
time_t last_update;
+ /* Interval in which the data is collected
+ * (for purding old entries) */
+ int interval;
} cache_entry_t;
static avl_tree_t *cache_tree = NULL;
-static pthread_mutex_t cache_lock;
+static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
static int cache_compare (const cache_entry_t *a, const cache_entry_t *b)
{
return (strcmp (a->name, b->name));
} /* int cache_compare */
+static int uc_send_notification (const char *name)
+{
+ cache_entry_t *ce = NULL;
+ int status;
+
+ char *name_copy;
+ char *host;
+ char *plugin;
+ char *plugin_instance;
+ char *type;
+ char *type_instance;
+
+ notification_t n;
+
+ memset (&n, '\0', sizeof (n));
+
+ name_copy = strdup (name);
+ if (name_copy == NULL)
+ {
+ ERROR ("uc_send_notification: strdup failed.");
+ return (-1);
+ }
+
+ status = parse_identifier (name_copy, &host,
+ &plugin, &plugin_instance,
+ &type, &type_instance);
+ if (status != 0)
+ {
+ ERROR ("uc_send_notification: Cannot parse name `%s'", name);
+ return (-1);
+ }
+
+ n.severity = NOTIF_FAILURE;
+ strncpy (n.host, host, sizeof (n.host));
+ n.host[sizeof (n.host) - 1] = '\0';
+
+ sfree (name_copy);
+ name_copy = host = plugin = plugin_instance = type = type_instance = NULL;
+
+ pthread_mutex_lock (&cache_lock);
+
+ n.time = time (NULL);
+
+ status = avl_get (cache_tree, name, (void *) &ce);
+ if (status != 0)
+ {
+ pthread_mutex_unlock (&cache_lock);
+ sfree (name_copy);
+ return (-1);
+ }
+
+ /* Check if the entry has been updated in the meantime */
+ if ((n.time - ce->last_update) < (2 * ce->interval))
+ {
+ pthread_mutex_unlock (&cache_lock);
+ sfree (name_copy);
+ return (-1);
+ }
+
+ snprintf (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 */
+
int uc_init (void)
{
if (cache_tree == NULL)
return (0);
} /* int uc_init */
+int uc_check_timeout (void)
+{
+ time_t now;
+ cache_entry_t *ce;
+
+ char **keys = NULL;
+ int keys_len = 0;
+
+ char *key;
+ avl_iterator_t *iter;
+ int i;
+
+ pthread_mutex_lock (&cache_lock);
+
+ now = time (NULL);
+
+ /* Build a list of entries to be flushed */
+ iter = avl_get_iterator (cache_tree);
+ while (avl_iterator_next (iter, (void *) &key, (void *) &ce) == 0)
+ {
+ /* If entry has not been updated, add to `keys' array */
+ if ((now - ce->last_update) >= (2 * ce->interval))
+ {
+ char **tmp;
+
+ tmp = (char **) realloc ((void *) keys,
+ (keys_len + 1) * sizeof (char *));
+ if (tmp == NULL)
+ {
+ ERROR ("uc_purge: realloc failed.");
+ avl_iterator_destroy (iter);
+ return (-1);
+ }
+
+ keys = tmp;
+ keys[keys_len] = strdup (key);
+ if (keys[keys_len] == NULL)
+ {
+ ERROR ("uc_check_timeout: strdup failed.");
+ continue;
+ }
+ keys_len++;
+ }
+ } /* while (avl_iterator_next) */
+
+ for (i = 0; i < keys_len; i++)
+ {
+ int status;
+
+ status = ut_check_interesting (keys[i]);
+
+ if (status < 0)
+ {
+ ERROR ("uc_check_timeout: ut_check_interesting failed.");
+ sfree (keys[i]);
+ }
+ else if (status == 0) /* ``service'' is uninteresting */
+ {
+ ce = NULL;
+ DEBUG ("uc_check_timeout: %s is missing but ``uninteresting''", keys[i]);
+ status = avl_remove (cache_tree, keys[i], (void *) &key, (void *) &ce);
+ if (status != 0)
+ {
+ ERROR ("uc_check_timeout: avl_remove (%s) failed.", keys[i]);
+ }
+ sfree (keys[i]);
+ sfree (ce);
+ }
+ else /* (status > 0); ``service'' is interesting */
+ {
+ /*
+ * `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]);
+ }
+ } /* for (keys[i]) */
+
+ avl_iterator_destroy (iter);
+
+ pthread_mutex_unlock (&cache_lock);
+
+ for (i = 0; i < keys_len; i++)
+ {
+ if (keys[i] == NULL)
+ continue;
+
+ uc_send_notification (keys[i]);
+ sfree (keys[i]);
+ }
+
+ sfree (keys);
+
+ return (0);
+} /* int uc_check_timeout */
+
int uc_update (const data_set_t *ds, const value_list_t *vl)
{
char name[6 * DATA_MAX_NAME_LEN];
assert (ce != NULL);
assert (ce->values_num == ds->ds_num);
- if (ce->last_update >= vl->time)
+ 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_update);
+ name, (unsigned int) vl->time, (unsigned int) ce->last_time);
return (-1);
}
+ if ((ce->last_time + ce->interval) < vl->time)
+ {
+ /* TODO: Implement a `real' okay notification. Watch out for locking
+ * issues, though! */
+ NOTICE ("uc_insert: Okay notification for %s", name);
+ }
+
for (i = 0; i < ds->ds_num; i++)
{
if (ds->ds[i].type == DS_TYPE_COUNTER)
{
- ce->values_gauge[i] = ((double) (vl->values[i].counter
- - ce->values_counter[i]))
- / ((double) (vl->time - ce->last_update));
+ 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;
}
else /* if (ds->ds[i].type == DS_TYPE_GAUGE) */
DEBUG ("uc_insert: %s: ds[%i] = %lf", name, i, ce->values_gauge[i]);
} /* for (i) */
- ce->last_update = vl->time;
+ ce->last_time = vl->time;
+ ce->last_update = time (NULL);
+ ce->interval = vl->interval;
}
else /* key is not found */
{
}
} /* for (i) */
- ce->last_update = vl->time;
+ ce->last_time = vl->time;
+ ce->last_update = time (NULL);
+ ce->interval = vl->interval;
if (avl_insert (cache_tree, key, ce) != 0)
{