/**
* collectd - src/plugin.c
- * Copyright (C) 2005,2006 Florian octo Forster
+ * Copyright (C) 2005-2008 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
*
* Authors:
* Florian octo Forster <octo at verplant.org>
+ * Sebastian Harl <sh at tokkee.org>
**/
#include "collectd.h"
#include "common.h"
#include "plugin.h"
#include "configfile.h"
+#include "utils_avltree.h"
#include "utils_llist.h"
+#include "utils_cache.h"
+#include "utils_threshold.h"
/*
* Private structures
static llist_t *list_init;
static llist_t *list_read;
static llist_t *list_write;
+static llist_t *list_flush;
static llist_t *list_shutdown;
-static llist_t *list_data_set;
static llist_t *list_log;
+static llist_t *list_notification;
+
+static c_avl_tree_t *data_sets;
static char *plugindir = NULL;
static int register_callback (llist_t **list, const char *name, void *callback)
{
llentry_t *le;
+ char *key;
if ((*list == NULL)
&& ((*list = llist_create ()) == NULL))
le = llist_search (*list, name);
if (le == NULL)
{
- le = llentry_create (name, callback);
+ key = strdup (name);
+ if (key == NULL)
+ return (-1);
+
+ le = llentry_create (key, callback);
if (le == NULL)
+ {
+ free (key);
return (-1);
+ }
llist_append (*list, le);
}
return (-1);
llist_remove (list, e);
+ free (e->key);
llentry_destroy (e);
return (0);
* object, but it will bitch about a shared object not having a
* ``module_register'' symbol..
*/
-static int plugin_load_file (char *file, modreg_e load)
+static int plugin_load_file (char *file)
{
lt_dlhandle dlh;
- void (*reg_handle) (modreg_e mr);
+ void (*reg_handle) (void);
DEBUG ("file = %s", file);
const char *error = lt_dlerror ();
ERROR ("lt_dlopen failed: %s", error);
- DEBUG ("lt_dlopen failed: %s", error);
+ fprintf (stderr, "lt_dlopen failed: %s\n", error);
return (1);
}
- if ((reg_handle = (void (*) (modreg_e)) lt_dlsym (dlh, "module_register")) == NULL)
+ if ((reg_handle = (void (*) (void)) lt_dlsym (dlh, "module_register")) == NULL)
{
WARNING ("Couldn't find symbol ``module_register'' in ``%s'': %s\n",
file, lt_dlerror ());
return (-1);
}
- (*reg_handle) (load);
+ (*reg_handle) ();
return (0);
}
if (status != 0)
{
+ if (rf->wait_time < interval_g)
+ rf->wait_time = interval_g;
rf->wait_left = rf->wait_time;
rf->wait_time = rf->wait_time * 2;
if (rf->wait_time > 86400)
rf->wait_time = 86400;
NOTICE ("read-function of plugin `%s' "
- "failed. Will syspend it for %i "
+ "failed. Will suspend it for %i "
"seconds.", le->key, rf->wait_left);
}
else
pthread_mutex_unlock (&read_lock);
pthread_exit (NULL);
+ return ((void *) 0);
} /* void *plugin_read_thread */
static void start_threads (int num)
{
ERROR ("plugin: stop_threads: pthread_join failed.");
}
- read_threads[i] = -1;
+ read_threads[i] = (pthread_t) 0;
}
sfree (read_threads);
read_threads_num = 0;
}
#define BUFSIZE 512
-int plugin_load (const char *type, modreg_e mr)
+int plugin_load (const char *type)
{
DIR *dh;
const char *dir;
continue;
}
- if (plugin_load_file (filename, mr) == 0)
+ if (plugin_load_file (filename) == 0)
{
/* success */
ret = 0;
break;
}
+ else
+ {
+ fprintf (stderr, "Unable to load plugin %s.\n", type);
+ }
}
closedir (dh);
return (0);
} /* int plugin_register_config */
+int plugin_register_complex_config (const char *type,
+ int (*callback) (oconfig_item_t *))
+{
+ return (cf_register_complex (type, callback));
+} /* int plugin_register_complex_config */
+
int plugin_register_init (const char *name,
int (*callback) (void))
{
return (register_callback (&list_write, name, (void *) callback));
} /* int plugin_register_write */
+int plugin_register_flush (const char *name, int (*callback) (const int))
+{
+ return (register_callback (&list_flush, name, (void *) callback));
+} /* int plugin_register_flush */
+
int plugin_register_shutdown (char *name,
int (*callback) (void))
{
int plugin_register_data_set (const data_set_t *ds)
{
- return (register_callback (&list_data_set, ds->type, (void *) ds));
+ data_set_t *ds_copy;
+ int i;
+
+ if ((data_sets != NULL)
+ && (c_avl_get (data_sets, ds->type, NULL) == 0))
+ {
+ NOTICE ("Replacing DS `%s' with another version.", ds->type);
+ plugin_unregister_data_set (ds->type);
+ }
+ else if (data_sets == NULL)
+ {
+ data_sets = c_avl_create ((int (*) (const void *, const void *)) strcmp);
+ if (data_sets == NULL)
+ return (-1);
+ }
+
+ ds_copy = (data_set_t *) malloc (sizeof (data_set_t));
+ if (ds_copy == NULL)
+ return (-1);
+ memcpy(ds_copy, ds, sizeof (data_set_t));
+
+ ds_copy->ds = (data_source_t *) malloc (sizeof (data_source_t)
+ * ds->ds_num);
+ if (ds_copy->ds == NULL)
+ {
+ free (ds_copy);
+ return (-1);
+ }
+
+ for (i = 0; i < ds->ds_num; i++)
+ memcpy (ds_copy->ds + i, ds->ds + i, sizeof (data_source_t));
+
+ return (c_avl_insert (data_sets, (void *) ds_copy->type, (void *) ds_copy));
} /* int plugin_register_data_set */
int plugin_register_log (char *name,
return (register_callback (&list_log, name, (void *) callback));
} /* int plugin_register_log */
+int plugin_register_notification (const char *name,
+ int (*callback) (const notification_t *notif))
+{
+ return (register_callback (&list_notification, name, (void *) callback));
+} /* int plugin_register_log */
+
int plugin_unregister_config (const char *name)
{
cf_unregister (name);
return (0);
} /* int plugin_unregister_config */
+int plugin_unregister_complex_config (const char *name)
+{
+ cf_unregister_complex (name);
+ return (0);
+} /* int plugin_unregister_complex_config */
+
int plugin_unregister_init (const char *name)
{
return (plugin_unregister (list_init, name));
int plugin_unregister_read (const char *name)
{
- return (plugin_unregister (list_read, name));
llentry_t *e;
e = llist_search (list_read, name);
llist_remove (list_read, e);
free (e->value);
+ free (e->key);
llentry_destroy (e);
return (0);
return (plugin_unregister (list_write, name));
}
+int plugin_unregister_flush (const char *name)
+{
+ return (plugin_unregister (list_flush, name));
+}
+
int plugin_unregister_shutdown (const char *name)
{
return (plugin_unregister (list_shutdown, name));
int plugin_unregister_data_set (const char *name)
{
- return (plugin_unregister (list_data_set, name));
-}
+ data_set_t *ds;
+
+ if (data_sets == NULL)
+ return (-1);
+
+ if (c_avl_remove (data_sets, name, NULL, (void *) &ds) != 0)
+ return (-1);
+
+ sfree (ds->ds);
+ sfree (ds);
+
+ return (0);
+} /* int plugin_unregister_data_set */
int plugin_unregister_log (const char *name)
{
return (plugin_unregister (list_log, name));
}
+int plugin_unregister_notification (const char *name)
+{
+ return (plugin_unregister (list_notification, name));
+}
+
void plugin_init_all (void)
{
int (*callback) (void);
start_threads ((num > 0) ? num : 5);
}
+ /* Init the value cache */
+ uc_init ();
+
if (list_init == NULL)
return;
le = llist_head (list_init);
while (le != NULL)
{
- callback = le->value;
+ callback = (int (*) (void)) le->value;
status = (*callback) ();
if (status != 0)
{
ERROR ("Initialization of plugin `%s' "
"failed with status %i. "
- "Plugin will be unloaded. TODO!",
+ "Plugin will be unloaded.",
le->key, status);
+ /* FIXME: Unload _all_ functions */
plugin_unregister_read (le->key);
}
}
} /* void plugin_init_all */
-void plugin_read_all (const int *loop)
+void plugin_read_all (void)
{
llentry_t *le;
read_func_t *rf;
+ uc_check_timeout ();
+
if (list_read == NULL)
return;
rf = (read_func_t *) le->value;
if (rf->needs_read != DONE)
+ {
+ le = le->next;
continue;
+ }
if (rf->wait_left > 0)
rf->wait_left -= interval_g;
pthread_mutex_unlock (&read_lock);
} /* void plugin_read_all */
+int plugin_flush_one (int timeout, const char *name)
+{
+ int (*callback) (int);
+ llentry_t *le;
+ int status;
+
+ if (list_flush == NULL)
+ return (-1);
+
+ le = llist_search (list_flush, name);
+ if (le == NULL)
+ return (-1);
+ callback = (int (*) (int)) le->value;
+
+ status = (*callback) (timeout);
+
+ return (status);
+} /* int plugin_flush_ont */
+
+void plugin_flush_all (int timeout)
+{
+ int (*callback) (int);
+ llentry_t *le;
+
+ if (list_flush == NULL)
+ return;
+
+ le = llist_head (list_flush);
+ while (le != NULL)
+ {
+ callback = (int (*) (int)) le->value;
+ le = le->next;
+
+ (*callback) (timeout);
+ }
+} /* void plugin_flush_all */
+
void plugin_shutdown_all (void)
{
int (*callback) (void);
le = llist_head (list_shutdown);
while (le != NULL)
{
- callback = le->value;
- (*callback) ();
+ callback = (int (*) (void)) le->value;
+ /* Advance the pointer before calling the callback allows
+ * shutdown functions to unregister themselves. If done the
+ * other way around the memory `le' points to will be freed
+ * after callback returns. */
le = le->next;
+
+ (*callback) ();
}
} /* void plugin_shutdown_all */
-int plugin_dispatch_values (const char *name, const value_list_t *vl)
+int plugin_dispatch_values (const char *name, value_list_t *vl)
{
int (*callback) (const data_set_t *, const value_list_t *);
data_set_t *ds;
llentry_t *le;
- if (list_write == NULL)
+ if ((list_write == NULL) || (data_sets == NULL))
return (-1);
- le = llist_search (list_data_set, name);
- if (le == NULL)
+ if (c_avl_get (data_sets, name, (void *) &ds) != 0)
{
DEBUG ("No such dataset registered: %s", name);
return (-1);
}
- ds = (data_set_t *) le->value;
-
- DEBUG ("plugin: plugin_dispatch_values: time = %u; host = %s; "
- "plugin = %s; plugin_instance = %s; type = %s; "
- "type_instance = %s;",
- (unsigned int) vl->time, vl->host,
+ DEBUG ("plugin: plugin_dispatch_values: time = %u; interval = %i; "
+ "host = %s; "
+ "plugin = %s; plugin_instance = %s; "
+ "type = %s; type_instance = %s;",
+ (unsigned int) vl->time, vl->interval,
+ vl->host,
vl->plugin, vl->plugin_instance,
ds->type, vl->type_instance);
+#if COLLECT_DEBUG
+ assert (ds->ds_num == vl->values_len);
+#else
+ if (ds->ds_num != vl->values_len)
+ {
+ ERROR ("plugin: ds->type = %s: (ds->ds_num = %i) != "
+ "(vl->values_len = %i)",
+ ds->type, ds->ds_num, vl->values_len);
+ return (-1);
+ }
+#endif
+
+ escape_slashes (vl->host, sizeof (vl->host));
+ escape_slashes (vl->plugin, sizeof (vl->plugin));
+ escape_slashes (vl->plugin_instance, sizeof (vl->plugin_instance));
+ escape_slashes (vl->type_instance, sizeof (vl->type_instance));
+
+ /* Update the value cache */
+ uc_update (ds, vl);
+ ut_check_threshold (ds, vl);
+
le = llist_head (list_write);
while (le != NULL)
{
- callback = le->value;
+ callback = (int (*) (const data_set_t *, const value_list_t *)) le->value;
(*callback) (ds, vl);
le = le->next;
}
return (0);
-}
+} /* int plugin_dispatch_values */
+
+int plugin_dispatch_notification (const notification_t *notif)
+{
+ int (*callback) (const notification_t *);
+ llentry_t *le;
+ /* Possible TODO: Add flap detection here */
+
+ DEBUG ("plugin_dispatch_notification: severity = %i; message = %s; "
+ "time = %u; host = %s;",
+ notif->severity, notif->message,
+ (unsigned int) notif->time, notif->host);
+
+ /* Nobody cares for notifications */
+ if (list_notification == NULL)
+ return (-1);
+
+ le = llist_head (list_notification);
+ while (le != NULL)
+ {
+ callback = (int (*) (const notification_t *)) le->value;
+ (*callback) (notif);
+
+ le = le->next;
+ }
+
+ return (0);
+} /* int plugin_dispatch_notification */
void plugin_log (int level, const char *format, ...)
{
le = llist_head (list_log);
while (le != NULL)
{
- callback = le->value;
+ callback = (void (*) (int, const char *)) le->value;
(*callback) (level, msg);
le = le->next;
}
} /* void plugin_log */
-void plugin_complain (int level, complain_t *c, const char *format, ...)
-{
- char message[512];
- va_list ap;
-
- if (c->delay > 0)
- {
- c->delay--;
- return;
- }
-
- if (c->interval < interval_g)
- c->interval = interval_g;
- else
- c->interval *= 2;
-
- if (c->interval > 86400)
- c->interval = 86400;
-
- c->delay = c->interval / interval_g;
-
- va_start (ap, format);
- vsnprintf (message, 512, format, ap);
- message[511] = '\0';
- va_end (ap);
-
- plugin_log (level, message);
-}
-
-void plugin_relief (int level, complain_t *c, const char *format, ...)
-{
- char message[512];
- va_list ap;
-
- if (c->interval == 0)
- return;
-
- c->interval = 0;
-
- va_start (ap, format);
- vsnprintf (message, 512, format, ap);
- message[511] = '\0';
- va_end (ap);
-
- plugin_log (level, message);
-}
-
const data_set_t *plugin_get_ds (const char *name)
{
data_set_t *ds;
- llentry_t *le;
- le = llist_search (list_data_set, name);
- if (le == NULL)
+ if (c_avl_get (data_sets, name, (void *) &ds) != 0)
{
DEBUG ("No such dataset registered: %s", name);
return (NULL);
}
- ds = (data_set_t *) le->value;
-
return (ds);
} /* data_set_t *plugin_get_ds */
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