/**
* collectd - src/plugin.c
- * Copyright (C) 2005-2008 Florian octo Forster
+ * Copyright (C) 2005-2009 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
#include "utils_llist.h"
#include "utils_cache.h"
#include "utils_threshold.h"
+#include "filter_chain.h"
/*
* Private structures
static llist_t *list_init;
static llist_t *list_read;
static llist_t *list_write;
+static llist_t *list_filter;
static llist_t *list_flush;
static llist_t *list_shutdown;
static llist_t *list_log;
static llist_t *list_notification;
+static fc_chain_t *pre_cache_chain = NULL;
+static fc_chain_t *post_cache_chain = NULL;
+
static c_avl_tree_t *data_sets;
static char *plugindir = NULL;
{
const char *error = lt_dlerror ();
- ERROR ("lt_dlopen failed: %s", error);
- fprintf (stderr, "lt_dlopen failed: %s\n", error);
+ ERROR ("lt_dlopen (%s) failed: %s", file, error);
+ fprintf (stderr, "lt_dlopen (%s) failed: %s\n", file, error);
return (1);
}
if ((reg_handle = (void (*) (void)) lt_dlsym (dlh, "module_register")) == NULL)
{
- WARNING ("Couldn't find symbol ``module_register'' in ``%s'': %s\n",
+ WARNING ("Couldn't find symbol `module_register' in `%s': %s\n",
file, lt_dlerror ());
lt_dlclose (dlh);
return (-1);
{
int i;
+ if (read_threads == NULL)
+ return;
+
pthread_mutex_lock (&read_lock);
read_loop = 0;
DEBUG ("plugin: stop_threads: Signalling `read_cond'");
return (register_callback (&list_write, name, (void *) callback));
} /* int plugin_register_write */
+int plugin_register_filter (const char *name,
+ int (*callback) (const data_set_t *ds, value_list_t *vl))
+{
+ return (register_callback (&list_filter, name, (void *) callback));
+} /* int plugin_register_filter */
+
int plugin_register_flush (const char *name,
int (*callback) (const int timeout, const char *identifier))
{
return (plugin_unregister (list_write, name));
}
+int plugin_unregister_filter (const char *name)
+{
+ return (plugin_unregister (list_filter, name));
+}
+
int plugin_unregister_flush (const char *name)
{
return (plugin_unregister (list_flush, name));
void plugin_init_all (void)
{
+ const char *chain_name;
int (*callback) (void);
llentry_t *le;
int status;
- /* Start read-threads */
- if (list_read != NULL)
- {
- const char *rt;
- int num;
- rt = global_option_get ("ReadThreads");
- num = atoi (rt);
- start_threads ((num > 0) ? num : 5);
- }
-
/* Init the value cache */
uc_init ();
- if (list_init == NULL)
+ chain_name = global_option_get ("PreCacheChain");
+ pre_cache_chain = fc_chain_get_by_name (chain_name);
+
+ chain_name = global_option_get ("PostCacheChain");
+ post_cache_chain = fc_chain_get_by_name (chain_name);
+
+
+ if ((list_init == NULL) && (list_read == NULL))
return;
+ /* Calling all init callbacks before checking if read callbacks
+ * are available allows the init callbacks to register the read
+ * callback. */
le = llist_head (list_init);
while (le != NULL)
{
"failed with status %i. "
"Plugin will be unloaded.",
le->key, status);
+ /* Plugins that register read callbacks from the init
+ * callback should take care of appropriate error
+ * handling themselves. */
/* FIXME: Unload _all_ functions */
plugin_unregister_read (le->key);
}
le = le->next;
}
+
+ /* Start read-threads */
+ if (list_read != NULL)
+ {
+ const char *rt;
+ int num;
+ rt = global_option_get ("ReadThreads");
+ num = atoi (rt);
+ if (num != -1)
+ start_threads ((num > 0) ? num : 5);
+ }
} /* void plugin_init_all */
void plugin_read_all (void)
pthread_mutex_unlock (&read_lock);
} /* void plugin_read_all */
-int plugin_flush_one (int timeout, const char *name)
+/* Read function called when the `-T' command line argument is given. */
+int plugin_read_all_once (void)
{
- int (*callback) (int);
- llentry_t *le;
+ llentry_t *le;
+ read_func_t *rf;
int status;
+ int return_status = 0;
- if (list_flush == NULL)
- return (-1);
-
- le = llist_search (list_flush, name);
- if (le == NULL)
- return (-1);
- callback = (int (*) (int)) le->value;
+ if (list_read == NULL)
+ {
+ NOTICE ("No read-functions are registered.");
+ return (0);
+ }
- status = (*callback) (timeout);
+ for (le = llist_head (list_read);
+ le != NULL;
+ le = le->next)
+ {
+ rf = (read_func_t *) le->value;
+ status = rf->callback ();
+ if (status != 0)
+ {
+ NOTICE ("read-function of plugin `%s' failed.",
+ le->key);
+ return_status = -1;
+ }
+ }
- return (status);
-} /* int plugin_flush_ont */
+ return (return_status);
+} /* int plugin_read_all_once */
-void plugin_flush_all (int timeout)
+int plugin_write (const char *plugin, /* {{{ */
+ const data_set_t *ds, const value_list_t *vl)
{
- int (*callback) (int);
- llentry_t *le;
+ int (*callback) (const data_set_t *ds, const value_list_t *vl);
+ llentry_t *le;
+ int status;
- if (list_flush == NULL)
- return;
+ if (vl == NULL)
+ return (EINVAL);
- le = llist_head (list_flush);
- while (le != NULL)
- {
- callback = (int (*) (int)) le->value;
- le = le->next;
+ if (list_write == NULL)
+ return (ENOENT);
- (*callback) (timeout);
- }
-} /* void plugin_flush_all */
+ if (ds == NULL)
+ {
+ ds = plugin_get_ds (vl->type);
+ if (ds == NULL)
+ {
+ ERROR ("plugin_write: Unable to lookup type `%s'.", vl->type);
+ return (ENOENT);
+ }
+ }
+
+ if (plugin == NULL)
+ {
+ int success = 0;
+ int failure = 0;
+
+ le = llist_head (list_write);
+ while (le != NULL)
+ {
+ callback = le->value;
+ status = (*callback) (ds, vl);
+ if (status != 0)
+ failure++;
+ else
+ success++;
+
+ le = le->next;
+ }
+
+ if ((success == 0) && (failure != 0))
+ status = -1;
+ else
+ status = 0;
+ }
+ else /* plugin != NULL */
+ {
+ le = llist_head (list_write);
+ while (le != NULL)
+ {
+ if (strcasecmp (plugin, le->key) == 0)
+ break;
+
+ le = le->next;
+ }
+
+ if (le == NULL)
+ return (ENOENT);
+
+ callback = le->value;
+ status = (*callback) (ds, vl);
+ }
+
+ return (status);
+} /* }}} int plugin_write */
int plugin_flush (const char *plugin, int timeout, const char *identifier)
{
while (le != NULL)
{
if ((plugin != NULL)
- && (strcmp (plugin, le->key) != 0))
+ && (strcmp (plugin, le->key) != 0))
+ {
+ le = le->next;
continue;
+ }
callback = (int (*) (int, const char *)) le->value;
- le = le->next;
-
(*callback) (timeout, identifier);
+
+ le = le->next;
}
+ return (0);
} /* int plugin_flush */
void plugin_shutdown_all (void)
int plugin_dispatch_values (value_list_t *vl)
{
- static c_complain_t no_write_complaint = C_COMPLAIN_INIT;
+ int status;
+ static c_complain_t no_write_complaint = C_COMPLAIN_INIT_STATIC;
- int (*callback) (const data_set_t *, const value_list_t *);
data_set_t *ds;
- llentry_t *le;
if ((vl == NULL) || (*vl->type == '\0')) {
ERROR ("plugin_dispatch_values: Invalid value list.");
return (-1);
}
+ if (vl->time == 0)
+ vl->time = time (NULL);
+
DEBUG ("plugin_dispatch_values: time = %u; interval = %i; "
"host = %s; "
"plugin = %s; plugin_instance = %s; "
escape_slashes (vl->type, sizeof (vl->type));
escape_slashes (vl->type_instance, sizeof (vl->type_instance));
+ if (pre_cache_chain != NULL)
+ {
+ status = fc_process_chain (ds, vl, pre_cache_chain);
+ if (status < 0)
+ {
+ WARNING ("plugin_dispatch_values: Running the "
+ "pre-cache chain failed with "
+ "status %i (%#x).",
+ status, status);
+ }
+ else if (status == FC_TARGET_STOP)
+ return (0);
+ }
+
/* Update the value cache */
uc_update (ds, vl);
- ut_check_threshold (ds, vl);
- le = llist_head (list_write);
- while (le != NULL)
+ if (post_cache_chain != NULL)
{
- callback = (int (*) (const data_set_t *, const value_list_t *)) le->value;
- (*callback) (ds, vl);
-
- le = le->next;
+ status = fc_process_chain (ds, vl, post_cache_chain);
+ if (status < 0)
+ {
+ WARNING ("plugin_dispatch_values: Running the "
+ "post-cache chain failed with "
+ "status %i (%#x).",
+ status, status);
+ }
}
+ else
+ fc_default_action (ds, vl);
return (0);
} /* int plugin_dispatch_values */
void plugin_log (int level, const char *format, ...)
{
- char msg[512];
+ char msg[1024];
va_list ap;
void (*callback) (int, const char *);
#endif
va_start (ap, format);
- vsnprintf (msg, 512, format, ap);
- msg[511] = '\0';
+ vsnprintf (msg, sizeof (msg), format, ap);
+ msg[sizeof (msg) - 1] = '\0';
va_end (ap);
le = llist_head (list_log);
} /* data_set_t *plugin_get_ds */
static int plugin_notification_meta_add (notification_t *n,
- const char *name,
- enum notification_meta_type_e type,
- const void *value)
+ const char *name,
+ enum notification_meta_type_e type,
+ const void *value)
{
notification_meta_t *meta;
notification_meta_t *tail;
{
case NM_TYPE_STRING:
{
- meta->value_string = strdup ((const char *) value);
- if (meta->value_string == NULL)
+ meta->nm_value.nm_string = strdup ((const char *) value);
+ if (meta->nm_value.nm_string == NULL)
{
ERROR ("plugin_notification_meta_add: strdup failed.");
sfree (meta);
}
case NM_TYPE_SIGNED_INT:
{
- meta->value_signed_int = *((int64_t *) value);
+ meta->nm_value.nm_signed_int = *((int64_t *) value);
break;
}
case NM_TYPE_UNSIGNED_INT:
{
- meta->value_unsigned_int = *((uint64_t *) value);
+ meta->nm_value.nm_unsigned_int = *((uint64_t *) value);
break;
}
case NM_TYPE_DOUBLE:
{
- meta->value_double = *((double *) value);
+ meta->nm_value.nm_double = *((double *) value);
break;
}
case NM_TYPE_BOOLEAN:
{
- meta->value_boolean = *((bool *) value);
+ meta->nm_value.nm_boolean = *((bool *) value);
break;
}
default:
{
if (meta->type == NM_TYPE_STRING)
plugin_notification_meta_add_string (dst, meta->name,
- meta->value_string);
+ meta->nm_value.nm_string);
else if (meta->type == NM_TYPE_SIGNED_INT)
plugin_notification_meta_add_signed_int (dst, meta->name,
- meta->value_signed_int);
+ meta->nm_value.nm_signed_int);
else if (meta->type == NM_TYPE_UNSIGNED_INT)
plugin_notification_meta_add_unsigned_int (dst, meta->name,
- meta->value_unsigned_int);
+ meta->nm_value.nm_unsigned_int);
else if (meta->type == NM_TYPE_DOUBLE)
plugin_notification_meta_add_double (dst, meta->name,
- meta->value_double);
+ meta->nm_value.nm_double);
else if (meta->type == NM_TYPE_BOOLEAN)
plugin_notification_meta_add_boolean (dst, meta->name,
- meta->value_boolean);
+ meta->nm_value.nm_boolean);
}
return (0);
if (this->type == NM_TYPE_STRING)
{
- sfree (this->value_string);
+ free ((char *)this->nm_value.nm_string);
+ this->nm_value.nm_string = NULL;
}
sfree (this);
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