/**
* 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
};
typedef struct read_func_s read_func_t;
+struct dispatch_queue_s;
+typedef struct dispatch_queue_s dispatch_queue_t;
+struct dispatch_queue_s
+{
+ value_list_t *vl;
+ dispatch_queue_t *next;
+};
+
/*
* Private variables
*/
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;
-static int read_loop = 1;
+static int read_loop = 0;
static pthread_mutex_t read_lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t read_cond = PTHREAD_COND_INITIALIZER;
static pthread_t *read_threads = NULL;
-static int read_threads_num = 0;
+static size_t read_threads_num = 0;
+
+static int dispatch_loop = 0;
+static pthread_mutex_t dispatch_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t dispatch_cond = PTHREAD_COND_INITIALIZER;
+static pthread_t *dispatch_threads = NULL;
+static size_t dispatch_threads_num = 0;
+static dispatch_queue_t *dispatch_head;
+static dispatch_queue_t *dispatch_tail;
/*
* Static functions
return (0);
}
-static void *plugin_read_thread (void *args)
+static void *plugin_read_thread (void __attribute__((unused)) *args)
{
llentry_t *le;
read_func_t *rf;
return ((void *) 0);
} /* void *plugin_read_thread */
-static void start_threads (int num)
+static void *plugin_dispatch_thread (void *arg)
{
- int i;
+ pthread_mutex_lock (&dispatch_lock);
- if (read_threads != NULL)
- return;
+ while ((dispatch_loop != 0) || (dispatch_head != NULL))
+ {
+ dispatch_queue_t *qi;
+
+ if (dispatch_head == NULL)
+ pthread_cond_wait (&dispatch_cond, &dispatch_lock);
+
+ if (dispatch_head == NULL)
+ continue;
+
+ qi = dispatch_head;
+
+ if (dispatch_head == dispatch_tail)
+ {
+ dispatch_head = NULL;
+ dispatch_tail = NULL;
+ }
+ else
+ {
+ dispatch_head = qi->next;
+ }
+
+ pthread_mutex_unlock (&dispatch_lock);
+
+ plugin_dispatch_values (qi->vl);
+ sfree (qi->vl->values);
+ sfree (qi->vl);
+ sfree (qi);
+
+ pthread_mutex_lock (&dispatch_lock);
+ } /* while */
- read_threads = (pthread_t *) calloc (num, sizeof (pthread_t));
- if (read_threads == NULL)
+ pthread_mutex_unlock (&dispatch_lock);
+
+ return ((void *) 0);
+} /* void *plugin_dispatch_thread */
+
+static int plugin_start_threads (size_t num,
+ pthread_t **tlist, size_t *tlist_num,
+ void *(*thread_main) (void *))
+{
+ size_t i;
+ pthread_t *new_tlist;
+ size_t new_tlist_num;
+
+ if (*tlist != NULL)
+ return (-1);
+
+ new_tlist = (pthread_t *) calloc (num, sizeof (*new_tlist));
+ if (new_tlist == NULL)
{
- ERROR ("plugin: start_threads: calloc failed.");
- return;
+ ERROR ("plugin: plugin_start_threads: calloc failed.");
+ return (-1);
}
- read_threads_num = 0;
+ new_tlist_num = 0;
for (i = 0; i < num; i++)
{
- if (pthread_create (read_threads + read_threads_num, NULL,
- plugin_read_thread, NULL) == 0)
- {
- read_threads_num++;
- }
- else
+ int status;
+
+ status = pthread_create (new_tlist + new_tlist_num,
+ /* attr = */ NULL, thread_main,
+ /* arg = */ (void *) 0);
+ if (status != 0)
{
- ERROR ("plugin: start_threads: pthread_create failed.");
- return;
+ ERROR ("plugin: plugin_start_threads: "
+ "pthread_create failed.");
+ continue;
}
+
+ new_tlist_num++;
} /* for (i) */
-} /* void start_threads */
-static void stop_threads (void)
+ if (new_tlist_num < 1)
+ {
+ ERROR ("plugin: plugin_start_threads: "
+ "Creating threads failed.");
+ sfree (new_tlist);
+ return (-1);
+ }
+
+ *tlist = new_tlist;
+ *tlist_num = new_tlist_num;
+
+ return (0);
+} /* int plugin_start_threads */
+
+static int plugin_stop_threads (int *loop,
+ pthread_mutex_t *lock, pthread_cond_t *cond,
+ pthread_t **ret_tlist, size_t *ret_tlist_len)
{
- int i;
+ pthread_t *tlist;
+ size_t tlist_len;
+ size_t i;
- pthread_mutex_lock (&read_lock);
- read_loop = 0;
- DEBUG ("plugin: stop_threads: Signalling `read_cond'");
- pthread_cond_broadcast (&read_cond);
- pthread_mutex_unlock (&read_lock);
+ tlist = *ret_tlist;
+ tlist_len = *ret_tlist_len;
+
+ if (tlist == NULL)
+ return (0);
+
+ DEBUG ("plugin_stop_threads: Stopping %zu threads.", tlist_len);
+
+ pthread_mutex_lock (lock);
+
+ *loop = 0;
- for (i = 0; i < read_threads_num; i++)
+ pthread_cond_broadcast (cond);
+ pthread_mutex_unlock (lock);
+
+ for (i = 0; i < tlist_len; i++)
{
- if (pthread_join (read_threads[i], NULL) != 0)
+ int status;
+
+ status = pthread_join (tlist[i], NULL);
+ if (status != 0)
{
- ERROR ("plugin: stop_threads: pthread_join failed.");
+ ERROR ("plugin_stop_threads: pthread_join failed.");
}
- read_threads[i] = (pthread_t) 0;
}
- sfree (read_threads);
- read_threads_num = 0;
-} /* void stop_threads */
+
+ sfree (tlist);
+
+ *ret_tlist = NULL;
+ *ret_tlist_len = 0;
+
+ return (0);
+} /* int plugin_stop_threads */
/*
* Public functions
int ret;
struct stat statbuf;
struct dirent *de;
+ int status;
DEBUG ("type = %s", type);
/* `cpu' should not match `cpufreq'. To solve this we add `.so' to the
* type when matching the filename */
- if (ssnprintf (typename, sizeof (typename),
- "%s.so", type) >= sizeof (typename))
+ status = ssnprintf (typename, sizeof (typename), "%s.so", type);
+ if ((status < 0) || ((size_t) status >= sizeof (typename)))
{
WARNING ("snprintf: truncated: `%s.so'", type);
return (-1);
if (strncasecmp (de->d_name, typename, typename_len))
continue;
- if (ssnprintf (filename, sizeof (filename),
- "%s/%s", dir, de->d_name) >= sizeof (filename))
+ status = ssnprintf (filename, sizeof (filename),
+ "%s/%s", dir, de->d_name);
+ if ((status < 0) || ((size_t) status >= sizeof (filename)))
{
WARNING ("snprintf: truncated: `%s/%s'", dir, de->d_name);
continue;
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;
/* Init the value cache */
uc_init ();
+ 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;
int num;
rt = global_option_get ("ReadThreads");
num = atoi (rt);
- start_threads ((num > 0) ? num : 5);
+ if (num != -1)
+ {
+ read_loop = 1;
+ plugin_start_threads ((num > 0) ? ((size_t ) num) : 5,
+ &read_threads, &read_threads_num,
+ plugin_read_thread);
+ }
}
+
+ dispatch_loop = 1;
+ plugin_start_threads (/* num = */ 1, /* FIXME: Make this number configurable */
+ &dispatch_threads, &dispatch_threads_num,
+ plugin_dispatch_thread);
} /* void plugin_init_all */
void plugin_read_all (void)
pthread_mutex_unlock (&read_lock);
} /* void plugin_read_all */
+/* Read function called when the `-T' command line argument is given. */
+int plugin_read_all_once (void)
+{
+ llentry_t *le;
+ read_func_t *rf;
+ int status;
+ int return_status = 0;
+
+ if (list_read == NULL)
+ {
+ NOTICE ("No read-functions are registered.");
+ return (0);
+ }
+
+ 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 (return_status);
+} /* int plugin_read_all_once */
+
+int plugin_write (const char *plugin, /* {{{ */
+ const data_set_t *ds, const value_list_t *vl)
+{
+ int (*callback) (const data_set_t *ds, const value_list_t *vl);
+ llentry_t *le;
+ int status;
+
+ if (vl == NULL)
+ return (EINVAL);
+
+ if (list_write == NULL)
+ return (ENOENT);
+
+ 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)
{
int (*callback) (int timeout, const char *identifier);
int (*callback) (void);
llentry_t *le;
- stop_threads ();
+ plugin_stop_threads (&read_loop, &read_lock, &read_cond,
+ &read_threads, &read_threads_num);
+
+ plugin_stop_threads (&dispatch_loop, &dispatch_lock, &dispatch_cond,
+ &dispatch_threads, &dispatch_threads_num);
if (list_shutdown == NULL)
return;
int plugin_dispatch_values (value_list_t *vl)
{
+ int status;
static c_complain_t no_write_complaint = C_COMPLAIN_INIT_STATIC;
data_set_t *ds;
- llentry_t *le;
-
- int filter = 0;
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));
- le = llist_head (list_filter);
- while (le != NULL)
+ if (pre_cache_chain != NULL)
{
- int (*filter_callback) (const data_set_t *, value_list_t *) =
- (int (*) (const data_set_t *, value_list_t *)) le->value;
-
- filter |= (*filter_callback) (ds, vl);
-
- if (filter == FILTER_IGNORE)
- return (-1);
-
- le = le->next;
+ 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);
- if ((filter & FILTER_NOTHRESHOLD_CHECK) == 0)
- ut_check_threshold (ds, vl);
+ if (post_cache_chain != NULL)
+ {
+ 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);
- if (filter & FILTER_NOWRITE)
- return (0);
+ return (0);
+} /* int plugin_dispatch_values */
- le = llist_head (list_write);
- while (le != NULL)
+int plugin_dispatch_values_async (const value_list_t *vl)
+{
+ dispatch_queue_t *qi;
+ int i;
+
+ if (vl == NULL)
+ return (-EINVAL);
+
+ if (dispatch_threads_num < 1)
{
- int (*write_callback) (const data_set_t *, const value_list_t *) =
- (int (*) (const data_set_t *, const value_list_t *)) le->value;
+ ERROR ("plugin_dispatch_values_async: "
+ "No dispatch threads have been started!");
+#ifdef ENOTCONN
+ return (-ENOTCONN);
+#else
+ return (-1);
+#endif
+ }
+
+ qi = (dispatch_queue_t *) malloc (sizeof (*qi));
+ if (qi == NULL)
+ {
+ ERROR ("plugin_dispatch_values_async: malloc failed.");
+ return (-ENOMEM);
+ }
+ memset (qi, 0, sizeof (*qi));
+ qi->next = NULL;
- (*write_callback) (ds, vl);
+ qi->vl = (value_list_t *) malloc (sizeof (value_list_t));
+ if (qi->vl == NULL)
+ {
+ ERROR ("plugin_dispatch_values_async: malloc failed.");
+ sfree (qi);
+ return (-ENOMEM);
+ }
+ memcpy (qi->vl, vl, sizeof (value_list_t));
+ qi->vl->values = NULL;
- le = le->next;
+ qi->vl->values = (value_t *) calloc (qi->vl->values_len,
+ sizeof (value_t));
+ if (qi->vl->values == NULL)
+ {
+ ERROR ("plugin_dispatch_values_async: malloc failed.");
+ sfree (qi->vl);
+ sfree (qi);
+ return (-ENOMEM);
}
+ for (i = 0; i < vl->values_len; i++)
+ qi->vl->values[i] = vl->values[i];
+
+ pthread_mutex_lock (&dispatch_lock);
+
+ if (dispatch_tail == NULL)
+ {
+ dispatch_head = qi;
+ dispatch_tail = qi;
+ }
+ else
+ {
+ dispatch_tail->next = qi;
+ dispatch_tail = qi;
+ }
+
+ pthread_cond_signal (&dispatch_cond);
+ pthread_mutex_unlock (&dispatch_lock);
+
return (0);
-} /* int plugin_dispatch_values */
+} /* int plugin_dispatch_values_async */
int plugin_dispatch_notification (const notification_t *notif)
{
{
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);
} /* int plugin_notification_meta_copy */
-int plugin_notification_meta_free (notification_t *n)
+int plugin_notification_meta_free (notification_meta_t *n)
{
notification_meta_t *this;
notification_meta_t *next;
return (-1);
}
- this = n->meta;
- n->meta = NULL;
+ this = n;
while (this != NULL)
{
next = this->next;
if (this->type == NM_TYPE_STRING)
{
- free ((char *)this->value_string);
- this->value_string = NULL;
+ free ((char *)this->nm_value.nm_string);
+ this->nm_value.nm_string = NULL;
}
sfree (this);
projects / collectd.git / blobdiff