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diff --git a/src/core/plugin.c b/src/core/plugin.c
index f771d70936e5eda9fbbc2f2fbfa7c735b3e0605a..76fc2092d022ff8588a2b5f11739e8653fa5c1c4 100644 (file)
--- a/src/core/plugin.c
+++ b/src/core/plugin.c
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+#if HAVE_CONFIG_H
+# include "config.h"
+#endif /* HAVE_CONFIG_H */
+
#include "sysdb.h"
#include "core/plugin.h"
-#include "core/error.h"
#include "core/time.h"
+#include "utils/error.h"
#include "utils/llist.h"
+#include "utils/strbuf.h"
#include <assert.h>
#include <pthread.h>
+/* helper to access info attributes */
+#define INFO_GET(i, attr) \
+ ((i)->attr ? (i)->attr : #attr" not set")
+
/*
* private data types
*/
-struct sdb_plugin_info {
- char *name;
+typedef struct {
+ sdb_object_t super;
+ sdb_plugin_ctx_t public;
+
+ sdb_plugin_info_t info;
+ lt_dlhandle handle;
- char *description;
- char *copyright;
- char *license;
+ /* The usage count differs from the object's ref count
+ * in that it provides higher level information about how
+ * the plugin is in use. */
+ size_t use_cnt;
+} ctx_t;
+#define CTX_INIT { SDB_OBJECT_INIT, \
+ SDB_PLUGIN_CTX_INIT, SDB_PLUGIN_INFO_INIT, NULL, 0 }
- int version;
- int plugin_version;
-};
-#define SDB_PLUGIN_INFO_INIT { "no name set", "no description set", \
- /* copyright */ "", /* license */ "", \
- /* version */ -1, /* plugin_version */ -1 }
+#define CTX(obj) ((ctx_t *)(obj))
typedef struct {
sdb_object_t super;
void *cb_callback;
sdb_object_t *cb_user_data;
- sdb_plugin_ctx_t cb_ctx;
-} sdb_plugin_cb_t;
-#define SDB_PLUGIN_CB_INIT { SDB_OBJECT_INIT, \
+ ctx_t *cb_ctx;
+} callback_t;
+#define CB_INIT { SDB_OBJECT_INIT, \
/* callback = */ NULL, /* user_data = */ NULL, \
SDB_PLUGIN_CTX_INIT }
+#define CB(obj) ((callback_t *)(obj))
+#define CONST_CB(obj) ((const callback_t *)(obj))
typedef struct {
- sdb_plugin_cb_t super;
+ callback_t super;
#define ccb_callback super.cb_callback
#define ccb_user_data super.cb_user_data
#define ccb_ctx super.cb_ctx
sdb_time_t ccb_interval;
sdb_time_t ccb_next_update;
-} sdb_plugin_collector_cb_t;
+} collector_t;
+#define CCB(obj) ((collector_t *)(obj))
+#define CONST_CCB(obj) ((const collector_t *)(obj))
+
+typedef struct {
+ callback_t super; /* cb_callback will always be NULL */
+#define w_user_data super.cb_user_data
+#define w_ctx super.cb_ctx
+ sdb_store_writer_t impl;
+} writer_t;
+#define WRITER(obj) ((writer_t *)(obj))
-#define SDB_PLUGIN_CB(obj) ((sdb_plugin_cb_t *)(obj))
-#define SDB_PLUGIN_CCB(obj) ((sdb_plugin_collector_cb_t *)(obj))
+typedef struct {
+ callback_t super; /* cb_callback will always be NULL */
+#define r_user_data super.cb_user_data
+#define r_ctx super.cb_ctx
+ sdb_store_reader_t impl;
+} reader_t;
+#define READER(obj) ((reader_t *)(obj))
+
+typedef struct {
+ callback_t super; /* cb_callback will always be NULL */
+#define ts_user_data super.cb_user_data
+#define ts_ctx super.cb_ctx
+ sdb_timeseries_fetcher_t impl;
+} ts_fetcher_t;
+#define TS_FETCHER(obj) ((ts_fetcher_t *)(obj))
/*
* private variables
*/
-static sdb_plugin_ctx_t plugin_default_ctx = SDB_PLUGIN_CTX_INIT;
+static sdb_plugin_ctx_t plugin_default_ctx = SDB_PLUGIN_CTX_INIT;
+static sdb_plugin_info_t plugin_default_info = SDB_PLUGIN_INFO_INIT;
+
+static pthread_key_t plugin_ctx_key;
+static bool plugin_ctx_key_initialized = 0;
-static pthread_key_t plugin_ctx_key;
-static _Bool plugin_ctx_key_initialized = 0;
+/* a list of the plugin contexts of all registered plugins */
+static sdb_llist_t *all_plugins = NULL;
static sdb_llist_t *config_list = NULL;
static sdb_llist_t *init_list = NULL;
static sdb_llist_t *collector_list = NULL;
+static sdb_llist_t *cname_list = NULL;
static sdb_llist_t *shutdown_list = NULL;
static sdb_llist_t *log_list = NULL;
+static sdb_llist_t *timeseries_fetcher_list = NULL;
+static sdb_llist_t *writer_list = NULL;
+static sdb_llist_t *reader_list = NULL;
+
+static struct {
+ const char *type;
+ sdb_llist_t **list;
+} all_lists[] = {
+ { "config", &config_list },
+ { "init", &init_list },
+ { "collector", &collector_list },
+ { "cname", &cname_list },
+ { "shutdown", &shutdown_list },
+ { "log", &log_list },
+ { "timeseries fetcher", ×eries_fetcher_list },
+ { "store writer", &writer_list },
+ { "store reader", &reader_list },
+};
/*
* private helper functions
*/
static void
-sdb_plugin_ctx_destructor(void *ctx)
+plugin_info_clear(sdb_plugin_info_t *info)
{
- if (! ctx)
+ sdb_plugin_info_t empty_info = SDB_PLUGIN_INFO_INIT;
+ if (! info)
return;
- free(ctx);
-} /* sdb_plugin_ctx_destructor */
+
+ if (info->plugin_name)
+ free(info->plugin_name);
+ if (info->filename)
+ free(info->filename);
+
+ if (info->description)
+ free(info->description);
+ if (info->copyright)
+ free(info->copyright);
+ if (info->license)
+ free(info->license);
+
+ *info = empty_info;
+} /* plugin_info_clear */
static void
-sdb_plugin_ctx_init(void)
+ctx_key_init(void)
{
if (plugin_ctx_key_initialized)
return;
- pthread_key_create(&plugin_ctx_key, sdb_plugin_ctx_destructor);
+ pthread_key_create(&plugin_ctx_key, /* destructor */ NULL);
plugin_ctx_key_initialized = 1;
-} /* sdb_plugin_ctx_init */
-
-static sdb_plugin_ctx_t *
-sdb_plugin_ctx_create(void)
-{
- sdb_plugin_ctx_t *ctx;
-
- ctx = malloc(sizeof(*ctx));
- if (! ctx)
- return NULL;
-
- *ctx = plugin_default_ctx;
-
- if (! plugin_ctx_key_initialized)
- sdb_plugin_ctx_init();
- pthread_setspecific(plugin_ctx_key, ctx);
- return ctx;
-} /* sdb_plugin_ctx_create */
+} /* ctx_key_init */
static int
-sdb_plugin_cmp_next_update(const sdb_object_t *a, const sdb_object_t *b)
+plugin_cmp_next_update(const sdb_object_t *a, const sdb_object_t *b)
{
- const sdb_plugin_collector_cb_t *ccb1
- = (const sdb_plugin_collector_cb_t *)a;
- const sdb_plugin_collector_cb_t *ccb2
- = (const sdb_plugin_collector_cb_t *)b;
+ const collector_t *ccb1 = (const collector_t *)a;
+ const collector_t *ccb2 = (const collector_t *)b;
assert(ccb1 && ccb2);
return (ccb1->ccb_next_update > ccb2->ccb_next_update)
? 1 : (ccb1->ccb_next_update < ccb2->ccb_next_update)
? -1 : 0;
-} /* sdb_plugin_cmp_next_update */
+} /* plugin_cmp_next_update */
-static sdb_plugin_cb_t *
-sdb_plugin_find_by_name(sdb_llist_t *list, const char *name)
+static int
+plugin_lookup_by_name(const sdb_object_t *obj, const void *id)
{
- sdb_object_t tmp = SDB_OBJECT_INIT;
+ const callback_t *cb = CONST_CB(obj);
+ const char *name = id;
+ assert(cb && id);
+
+ /* when a plugin was registered from outside a plugin (e.g. the core),
+ * we don't have a plugin context */
+ if (! cb->cb_ctx)
+ return 1;
+
+ if (!strcasecmp(cb->cb_ctx->info.plugin_name, name))
+ return 0;
+ return 1;
+} /* plugin_lookup_by_name */
+
+/* since this function is called from sdb_plugin_reconfigure_finish()
+ * when iterating through all_plugins, we may not do any additional
+ * modifications to all_plugins except for the optional removal */
+static void
+plugin_unregister_by_name(const char *plugin_name)
+{
sdb_object_t *obj;
- assert(name);
+ size_t i;
- if (! list)
- return NULL;
+ for (i = 0; i < SDB_STATIC_ARRAY_LEN(all_lists); ++i) {
+ const char *type = all_lists[i].type;
+ sdb_llist_t *list = *all_lists[i].list;
- tmp.name = strdup(name);
- if (! tmp.name)
- return NULL;
- obj = sdb_llist_search(list, &tmp, sdb_object_cmp_by_name);
- free(tmp.name);
- if (! obj)
- return NULL;
- return SDB_PLUGIN_CB(obj);
-} /* sdb_plugin_find_by_name */
+ while (1) {
+ callback_t *cb;
+
+ cb = CB(sdb_llist_remove(list,
+ plugin_lookup_by_name, plugin_name));
+ if (! cb)
+ break;
+
+ assert(cb->cb_ctx);
+
+ sdb_log(SDB_LOG_INFO, "core: Unregistering "
+ "%s callback '%s' (module %s)", type, cb->super.name,
+ cb->cb_ctx->info.plugin_name);
+ sdb_object_deref(SDB_OBJ(cb));
+ }
+ }
+
+ obj = sdb_llist_search_by_name(all_plugins, plugin_name);
+ /* when called from sdb_plugin_reconfigure_finish, the object has already
+ * been removed from the list */
+ if (obj && (obj->ref_cnt <= 1)) {
+ sdb_llist_remove_by_name(all_plugins, plugin_name);
+ sdb_object_deref(obj);
+ }
+ /* else: other callbacks still reference it */
+} /* plugin_unregister_by_name */
+
+/*
+ * store writer wrapper for performing database queries:
+ * It wraps another store writer, adding extra logic as needed.
+ */
+
+typedef struct {
+ sdb_object_t super;
+ sdb_store_writer_t *w;
+ sdb_object_t *ud;
+ sdb_query_opts_t opts;
+} query_writer_t;
+#define QUERY_WRITER_INIT(w, ud) { \
+ SDB_OBJECT_INIT, \
+ (w), (ud), \
+ SDB_DEFAULT_QUERY_OPTS \
+}
+#define QUERY_WRITER(obj) ((query_writer_t *)(obj))
+
+static int
+query_store_host(sdb_store_host_t *host, sdb_object_t *user_data)
+{
+ query_writer_t *qw = QUERY_WRITER(user_data);
+ return qw->w->store_host(host, qw->ud);
+} /* query_store_host */
+
+static int
+query_store_service(sdb_store_service_t *service, sdb_object_t *user_data)
+{
+ query_writer_t *qw = QUERY_WRITER(user_data);
+ return qw->w->store_service(service, qw->ud);
+} /* query_store_service */
+
+static int
+query_store_metric(sdb_store_metric_t *metric, sdb_object_t *user_data)
+{
+ query_writer_t *qw = QUERY_WRITER(user_data);
+ sdb_timeseries_info_t *infos[metric->stores_num];
+ sdb_metric_store_t stores[metric->stores_num];
+
+ const sdb_metric_store_t *orig_stores = metric->stores;
+ int status;
+ size_t i;
+
+ if (! qw->opts.describe_timeseries)
+ /* nothing further to do */
+ return qw->w->store_metric(metric, qw->ud);
+
+ for (i = 0; i < metric->stores_num; i++) {
+ sdb_metric_store_t *s = stores + i;
+ *s = metric->stores[i];
+ infos[i] = sdb_plugin_describe_timeseries(s->type, s->id);
+ s->info = infos[i];
+ }
+
+ metric->stores = stores;
+ status = qw->w->store_metric(metric, qw->ud);
+ metric->stores = orig_stores;
+
+ for (i = 0; i < metric->stores_num; i++)
+ sdb_timeseries_info_destroy(infos[i]);
+ return status;
+} /* query_store_metric */
+
+static int
+query_store_attribute(sdb_store_attribute_t *attr, sdb_object_t *user_data)
+{
+ query_writer_t *qw = QUERY_WRITER(user_data);
+ return qw->w->store_attribute(attr, qw->ud);
+} /* query_store_attribute */
+
+static sdb_store_writer_t query_writer = {
+ query_store_host, query_store_service,
+ query_store_metric, query_store_attribute,
+};
/*
* private types
*/
static int
-sdb_plugin_cb_init(sdb_object_t *obj, va_list ap)
+ctx_init(sdb_object_t *obj, va_list __attribute__((unused)) ap)
+{
+ ctx_t *ctx = CTX(obj);
+
+ assert(ctx);
+
+ ctx->public = plugin_default_ctx;
+ ctx->info = plugin_default_info;
+ ctx->handle = NULL;
+ ctx->use_cnt = 1;
+ return 0;
+} /* ctx_init */
+
+static void
+ctx_destroy(sdb_object_t *obj)
+{
+ ctx_t *ctx = CTX(obj);
+
+ if (ctx->handle) {
+ const char *err;
+
+ sdb_log(SDB_LOG_INFO, "core: Unloading module %s",
+ ctx->info.plugin_name);
+
+ lt_dlerror();
+ lt_dlclose(ctx->handle);
+ if ((err = lt_dlerror()))
+ sdb_log(SDB_LOG_WARNING, "core: Failed to unload module %s: %s",
+ ctx->info.plugin_name, err);
+ }
+
+ plugin_info_clear(&ctx->info);
+} /* ctx_destroy */
+
+static sdb_type_t ctx_type = {
+ sizeof(ctx_t),
+
+ ctx_init,
+ ctx_destroy
+};
+
+static ctx_t *
+ctx_get(void)
+{
+ if (! plugin_ctx_key_initialized)
+ ctx_key_init();
+ return pthread_getspecific(plugin_ctx_key);
+} /* ctx_get */
+
+static ctx_t *
+ctx_set(ctx_t *new)
+{
+ ctx_t *old;
+
+ if (! plugin_ctx_key_initialized)
+ ctx_key_init();
+
+ old = pthread_getspecific(plugin_ctx_key);
+ if (old)
+ sdb_object_deref(SDB_OBJ(old));
+ if (new)
+ sdb_object_ref(SDB_OBJ(new));
+ pthread_setspecific(plugin_ctx_key, new);
+ return old;
+} /* ctx_set */
+
+static ctx_t *
+ctx_create(const char *name)
+{
+ ctx_t *ctx;
+
+ ctx = CTX(sdb_object_create(name, ctx_type));
+ if (! ctx)
+ return NULL;
+
+ if (! plugin_ctx_key_initialized)
+ ctx_key_init();
+ ctx_set(ctx);
+ return ctx;
+} /* ctx_create */
+
+/*
+ * plugin_init_ok:
+ * Checks whether the registration of a new plugin identified by 'obj' is
+ * okay. It consumes the first two arguments of 'ap'.
+ */
+static bool
+plugin_init_ok(sdb_object_t *obj, va_list ap)
{
sdb_llist_t **list = va_arg(ap, sdb_llist_t **);
- const char *type = va_arg(ap, const char *);
- void *callback = va_arg(ap, void *);
- sdb_object_t *ud = va_arg(ap, sdb_object_t *);
+ const char *type = va_arg(ap, const char *);
- assert(list);
- assert(type);
- assert(obj);
+ assert(list); assert(type);
- if (sdb_plugin_find_by_name(*list, obj->name)) {
- sdb_log(SDB_LOG_WARNING, "plugin: %s callback '%s' "
+ if (sdb_llist_search_by_name(*list, obj->name)) {
+ sdb_log(SDB_LOG_WARNING, "core: %s callback '%s' "
"has already been registered. Ignoring newly "
"registered version.", type, obj->name);
- return -1;
+ return 0;
}
+ return 1;
+} /* plugin_init_ok */
+
+static int
+plugin_cb_init(sdb_object_t *obj, va_list ap)
+{
+ void *callback;
+ sdb_object_t *ud;
+
+ if (! plugin_init_ok(obj, ap))
+ return -1;
- SDB_PLUGIN_CB(obj)->cb_callback = callback;
- SDB_PLUGIN_CB(obj)->cb_ctx = sdb_plugin_get_ctx();
+ callback = va_arg(ap, void *);
+ ud = va_arg(ap, sdb_object_t *);
+
+ /* cb_ctx may be NULL if the plugin was not registered by a plugin */
+
+ CB(obj)->cb_callback = callback;
+ CB(obj)->cb_ctx = ctx_get();
+ sdb_object_ref(SDB_OBJ(CB(obj)->cb_ctx));
sdb_object_ref(ud);
- SDB_PLUGIN_CB(obj)->cb_user_data = ud;
+ CB(obj)->cb_user_data = ud;
return 0;
-} /* sdb_plugin_cb_init */
+} /* plugin_cb_init */
static void
-sdb_plugin_cb_destroy(sdb_object_t *obj)
+plugin_cb_destroy(sdb_object_t *obj)
{
assert(obj);
- sdb_object_deref(SDB_PLUGIN_CB(obj)->cb_user_data);
-} /* sdb_plugin_cb_destroy */
+ sdb_object_deref(CB(obj)->cb_user_data);
+ sdb_object_deref(SDB_OBJ(CB(obj)->cb_ctx));
+} /* plugin_cb_destroy */
-static sdb_type_t sdb_plugin_cb_type = {
- sizeof(sdb_plugin_cb_t),
+static sdb_type_t callback_type = {
+ sizeof(callback_t),
- sdb_plugin_cb_init,
- sdb_plugin_cb_destroy,
- /* clone = */ NULL
+ plugin_cb_init,
+ plugin_cb_destroy
};
-static sdb_type_t sdb_plugin_collector_cb_type = {
- sizeof(sdb_plugin_collector_cb_t),
+static sdb_type_t collector_type = {
+ sizeof(collector_t),
- sdb_plugin_cb_init,
- sdb_plugin_cb_destroy,
- /* clone = */ NULL
+ plugin_cb_init,
+ plugin_cb_destroy
};
static int
-sdb_plugin_add_callback(sdb_llist_t **list, const char *type,
- const char *name, void *callback, sdb_object_t *user_data)
+plugin_writer_init(sdb_object_t *obj, va_list ap)
{
- sdb_object_t *obj;
+ sdb_store_writer_t *impl;
+ sdb_object_t *ud;
- if ((! name) || (! callback))
+ if (! plugin_init_ok(obj, ap))
return -1;
- assert(list);
+ impl = va_arg(ap, sdb_store_writer_t *);
+ ud = va_arg(ap, sdb_object_t *);
+ assert(impl);
- if (! *list)
- *list = sdb_llist_create();
- if (! *list)
+ if ((! impl->store_host) || (! impl->store_service)
+ || (! impl->store_metric) || (! impl->store_attribute)) {
+ sdb_log(SDB_LOG_ERR, "core: store writer callback '%s' "
+ "does not fully implement the writer interface.",
+ obj->name);
return -1;
+ }
- obj = sdb_object_create(name, sdb_plugin_cb_type,
- list, type, callback, user_data);
- if (! obj)
+ /* ctx may be NULL if the callback was not registered by a plugin */
+
+ WRITER(obj)->impl = *impl;
+ WRITER(obj)->w_ctx = ctx_get();
+ sdb_object_ref(SDB_OBJ(WRITER(obj)->w_ctx));
+
+ sdb_object_ref(ud);
+ WRITER(obj)->w_user_data = ud;
+ return 0;
+} /* plugin_writer_init */
+
+static void
+plugin_writer_destroy(sdb_object_t *obj)
+{
+ assert(obj);
+ sdb_object_deref(WRITER(obj)->w_user_data);
+ sdb_object_deref(SDB_OBJ(WRITER(obj)->w_ctx));
+} /* plugin_writer_destroy */
+
+static sdb_type_t writer_type = {
+ sizeof(writer_t),
+
+ plugin_writer_init,
+ plugin_writer_destroy
+};
+
+static int
+plugin_reader_init(sdb_object_t *obj, va_list ap)
+{
+ sdb_store_reader_t *impl;
+ sdb_object_t *ud;
+
+ if (! plugin_init_ok(obj, ap))
return -1;
- if (sdb_llist_append(*list, obj)) {
- sdb_object_deref(obj);
+ impl = va_arg(ap, sdb_store_reader_t *);
+ ud = va_arg(ap, sdb_object_t *);
+ assert(impl);
+
+ if ((! impl->prepare_query) || (! impl->execute_query)) {
+ sdb_log(SDB_LOG_ERR, "core: store reader callback '%s' "
+ "does not fully implement the reader interface.",
+ obj->name);
return -1;
}
- /* pass control to the list */
- sdb_object_deref(obj);
+ /* ctx may be NULL if the callback was not registered by a plugin */
- sdb_log(SDB_LOG_INFO, "plugin: Registered %s callback '%s'.",
- type, name);
+ READER(obj)->impl = *impl;
+ READER(obj)->r_ctx = ctx_get();
+ sdb_object_ref(SDB_OBJ(READER(obj)->r_ctx));
+
+ sdb_object_ref(ud);
+ READER(obj)->r_user_data = ud;
return 0;
-} /* sdb_plugin_add_callback */
+} /* plugin_reader_init */
-/*
- * public API
- */
+static void
+plugin_reader_destroy(sdb_object_t *obj)
+{
+ assert(obj);
+ sdb_object_deref(READER(obj)->r_user_data);
+ sdb_object_deref(SDB_OBJ(READER(obj)->r_ctx));
+} /* plugin_reader_destroy */
-int
-sdb_plugin_load(const char *name)
+static sdb_type_t reader_type = {
+ sizeof(reader_t),
+
+ plugin_reader_init,
+ plugin_reader_destroy
+};
+
+static int
+plugin_ts_fetcher_init(sdb_object_t *obj, va_list ap)
+{
+ sdb_timeseries_fetcher_t *impl;
+ sdb_object_t *ud;
+
+ if (! plugin_init_ok(obj, ap))
+ return -1;
+
+ impl = va_arg(ap, sdb_timeseries_fetcher_t *);
+ ud = va_arg(ap, sdb_object_t *);
+ assert(impl);
+
+ if ((! impl->describe) || (! impl->fetch)) {
+ sdb_log(SDB_LOG_ERR, "core: timeseries fetcher callback '%s' "
+ "does not fully implement the interface.",
+ obj->name);
+ return -1;
+ }
+
+ /* ctx may be NULL if the callback was not registered by a plugin */
+
+ TS_FETCHER(obj)->impl = *impl;
+ TS_FETCHER(obj)->ts_ctx = ctx_get();
+ sdb_object_ref(SDB_OBJ(TS_FETCHER(obj)->ts_ctx));
+
+ sdb_object_ref(ud);
+ TS_FETCHER(obj)->ts_user_data = ud;
+ return 0;
+} /* plugin_ts_fetcher_init */
+
+static void
+plugin_ts_fetcher_destroy(sdb_object_t *obj)
+{
+ assert(obj);
+ sdb_object_deref(TS_FETCHER(obj)->ts_user_data);
+ sdb_object_deref(SDB_OBJ(TS_FETCHER(obj)->ts_ctx));
+} /* plugin_ts_fetcher_destroy */
+
+static sdb_type_t ts_fetcher_type = {
+ sizeof(ts_fetcher_t),
+
+ plugin_ts_fetcher_init,
+ plugin_ts_fetcher_destroy
+};
+
+static int
+module_init(const char *name, lt_dlhandle lh, sdb_plugin_info_t *info)
+{
+ int (*mod_init)(sdb_plugin_info_t *);
+ int status;
+
+ mod_init = (int (*)(sdb_plugin_info_t *))lt_dlsym(lh, "sdb_module_init");
+ if (! mod_init) {
+ sdb_log(SDB_LOG_ERR, "core: Failed to load plugin '%s': "
+ "could not find symbol 'sdb_module_init'", name);
+ return -1;
+ }
+
+ status = mod_init(info);
+ if (status) {
+ sdb_log(SDB_LOG_ERR, "core: Failed to initialize "
+ "module '%s'", name);
+ plugin_unregister_by_name(name);
+ return -1;
+ }
+ return 0;
+} /* module_init */
+
+static int
+module_load(const char *basedir, const char *name,
+ const sdb_plugin_ctx_t *plugin_ctx)
{
- char real_name[strlen(name) > 0 ? strlen(name) : 1];
+ char base_name[name ? strlen(name) + 1 : 1];
const char *name_ptr;
char *tmp;
char filename[1024];
-
lt_dlhandle lh;
- int (*mod_init)(sdb_plugin_info_t *);
- sdb_plugin_info_t plugin_info = SDB_PLUGIN_INFO_INIT;
+ ctx_t *ctx;
int status;
- if ((! name) || (! *name))
- return -1;
+ assert(name);
- real_name[0] = '\0';
+ base_name[0] = '\0';
name_ptr = name;
while ((tmp = strstr(name_ptr, "::"))) {
- strncat(real_name, name_ptr, (size_t)(tmp - name_ptr));
- strcat(real_name, "/");
+ strncat(base_name, name_ptr, (size_t)(tmp - name_ptr));
+ strcat(base_name, "/");
name_ptr = tmp + strlen("::");
}
- strcat(real_name, name_ptr);
+ strcat(base_name, name_ptr);
- snprintf(filename, sizeof(filename), "%s/%s.so",
- PKGLIBDIR, real_name);
+ if (! basedir)
+ basedir = PKGLIBDIR;
+
+ snprintf(filename, sizeof(filename), "%s/%s.so", basedir, base_name);
filename[sizeof(filename) - 1] = '\0';
if (access(filename, R_OK)) {
char errbuf[1024];
- sdb_log(SDB_LOG_ERR, "plugin: Failed to load plugin '%s' (%s): %s",
+ sdb_log(SDB_LOG_ERR, "core: Failed to load plugin '%s' (%s): %s",
name, filename, sdb_strerror(errno, errbuf, sizeof(errbuf)));
return -1;
}
lh = lt_dlopen(filename);
if (! lh) {
- sdb_log(SDB_LOG_ERR, "plugin: Failed to load plugin '%s': %s"
+ sdb_log(SDB_LOG_ERR, "core: Failed to load plugin '%s': %s"
"The most common cause for this problem are missing "
"dependencies.\n", name, lt_dlerror());
return -1;
}
- mod_init = (int (*)(sdb_plugin_info_t *))lt_dlsym(lh, "sdb_module_init");
- if (! mod_init) {
- sdb_log(SDB_LOG_ERR, "plugin: Failed to load plugin '%s': "
- "could not find symbol 'sdb_module_init'", name);
+ if (ctx_get())
+ sdb_log(SDB_LOG_WARNING, "core: Discarding old plugin context");
+
+ ctx = ctx_create(name);
+ if (! ctx) {
+ sdb_log(SDB_LOG_ERR, "core: Failed to initialize plugin context");
return -1;
}
- status = mod_init(&plugin_info);
- if (status) {
- sdb_log(SDB_LOG_ERR, "plugin: Failed to initialize "
- "plugin '%s'", name);
- return -1;
+ ctx->info.plugin_name = strdup(name);
+ ctx->info.filename = strdup(filename);
+ ctx->handle = lh;
+
+ if (plugin_ctx)
+ ctx->public = *plugin_ctx;
+
+ if ((status = module_init(name, lh, &ctx->info))) {
+ sdb_object_deref(SDB_OBJ(ctx));
+ ctx_set(NULL);
+ return status;
}
/* compare minor version */
- if ((plugin_info.version < 0)
- || ((int)(plugin_info.version / 100) != (int)(SDB_VERSION / 100)))
- sdb_log(SDB_LOG_WARNING, "plugin: WARNING: version of "
+ if ((ctx->info.version < 0)
+ || ((int)(ctx->info.version / 100) != (int)(SDB_VERSION / 100)))
+ sdb_log(SDB_LOG_WARNING, "core: WARNING: version of "
"plugin '%s' (%i.%i.%i) does not match our version "
"(%i.%i.%i); this might cause problems",
- name, SDB_VERSION_DECODE(plugin_info.version),
+ name, SDB_VERSION_DECODE(ctx->info.version),
SDB_VERSION_DECODE(SDB_VERSION));
- sdb_log(SDB_LOG_INFO, "plugin: Successfully loaded "
- "plugin '%s' v%i (%s)\n\t%s",
- plugin_info.name, plugin_info.plugin_version,
- plugin_info.description, plugin_info.copyright);
+ sdb_llist_append(all_plugins, SDB_OBJ(ctx));
+
+ sdb_log(SDB_LOG_INFO, "core: Successfully loaded "
+ "plugin %s v%i (%s)", ctx->info.plugin_name,
+ ctx->info.plugin_version,
+ INFO_GET(&ctx->info, description));
+ sdb_log(SDB_LOG_INFO, "core: Plugin %s: %s, License: %s",
+ ctx->info.plugin_name,
+ INFO_GET(&ctx->info, copyright),
+ INFO_GET(&ctx->info, license));
+
+ /* any registered callbacks took ownership of the context */
+ sdb_object_deref(SDB_OBJ(ctx));
+
+ /* reset */
+ ctx_set(NULL);
return 0;
-} /* sdb_plugin_load */
+} /* module_load */
-int
-sdb_plugin_set_info(sdb_plugin_info_t *info, int type, ...)
+static char *
+plugin_get_name(const char *name, char *buf, size_t bufsize)
{
- va_list ap;
+ ctx_t *ctx = ctx_get();
- if (! info)
+ if (ctx)
+ snprintf(buf, bufsize, "%s::%s", ctx->info.plugin_name, name);
+ else
+ snprintf(buf, bufsize, "core::%s", name);
+ return buf;
+} /* plugin_get_name */
+
+static int
+plugin_add_impl(sdb_llist_t **list, sdb_type_t T, const char *type,
+ const char *name, void *impl, sdb_object_t *user_data)
+{
+ sdb_object_t *obj;
+
+ if ((! name) || (! impl))
return -1;
- va_start(ap, type);
+ assert(list);
- switch (type) {
- case SDB_PLUGIN_INFO_NAME:
- {
- char *name = va_arg(ap, char *);
- info->name = name;
- }
- break;
- case SDB_PLUGIN_INFO_DESC:
- {
- char *desc = va_arg(ap, char *);
- info->description = desc;
- }
- break;
- case SDB_PLUGIN_INFO_COPYRIGHT:
- {
- char *copyright = va_arg(ap, char *);
- info->copyright = copyright;
- }
- break;
- case SDB_PLUGIN_INFO_LICENSE:
- {
- char *license = va_arg(ap, char *);
- info->license = license;
- }
- break;
- case SDB_PLUGIN_INFO_VERSION:
- {
- int version = va_arg(ap, int);
- info->version = version;
- }
- break;
- case SDB_PLUGIN_INFO_PLUGIN_VERSION:
- {
- int version = va_arg(ap, int);
- info->plugin_version = version;
- }
+ if (! *list)
+ *list = sdb_llist_create();
+ if (! *list)
+ return -1;
+
+ obj = sdb_object_create(name, T, list, type, impl, user_data);
+ if (! obj)
+ return -1;
+
+ if (sdb_llist_append(*list, obj)) {
+ sdb_object_deref(obj);
+ return -1;
+ }
+
+ /* pass control to the list */
+ sdb_object_deref(obj);
+
+ sdb_log(SDB_LOG_INFO, "core: Registered %s callback '%s'.",
+ type, name);
+ return 0;
+} /* plugin_add_impl */
+
+/*
+ * object meta-data
+ */
+
+typedef struct {
+ int obj_type;
+ sdb_time_t last_update;
+ sdb_time_t interval;
+} interval_fetcher_t;
+
+static int
+interval_fetcher_host(sdb_store_host_t *host, sdb_object_t *user_data)
+{
+ interval_fetcher_t *lu = SDB_OBJ_WRAPPER(user_data)->data;
+ lu->obj_type = SDB_HOST;
+ lu->last_update = host->last_update;
+ return 0;
+} /* interval_fetcher_host */
+
+static int
+interval_fetcher_service(sdb_store_service_t *svc, sdb_object_t *user_data)
+{
+ interval_fetcher_t *lu = SDB_OBJ_WRAPPER(user_data)->data;
+ lu->obj_type = SDB_SERVICE;
+ lu->last_update = svc->last_update;
+ return 0;
+} /* interval_fetcher_service */
+
+static int
+interval_fetcher_metric(sdb_store_metric_t *metric, sdb_object_t *user_data)
+{
+ interval_fetcher_t *lu = SDB_OBJ_WRAPPER(user_data)->data;
+ lu->obj_type = SDB_METRIC;
+ lu->last_update = metric->last_update;
+ return 0;
+} /* interval_fetcher_metric */
+
+static int
+interval_fetcher_attr(sdb_store_attribute_t *attr, sdb_object_t *user_data)
+{
+ interval_fetcher_t *lu = SDB_OBJ_WRAPPER(user_data)->data;
+ lu->obj_type = SDB_ATTRIBUTE;
+ lu->last_update = attr->last_update;
+ return 0;
+} /* interval_fetcher_attr */
+
+static sdb_store_writer_t interval_fetcher = {
+ interval_fetcher_host, interval_fetcher_service,
+ interval_fetcher_metric, interval_fetcher_attr,
+};
+
+static int
+get_interval(int obj_type, const char *hostname,
+ int parent_type, const char *parent, const char *name,
+ sdb_time_t last_update, sdb_time_t *interval_out)
+{
+ sdb_ast_fetch_t fetch = SDB_AST_FETCH_INIT;
+ char hn[hostname ? strlen(hostname) + 1 : 1];
+ char pn[parent ? strlen(parent) + 1 : 1];
+ char n[strlen(name) + 1];
+ int status;
+
+ interval_fetcher_t lu = { 0, 0, 0 };
+ sdb_object_wrapper_t obj = SDB_OBJECT_WRAPPER_STATIC(&lu);
+ sdb_time_t interval;
+
+ assert(name);
+
+ if (hostname)
+ strncpy(hn, hostname, sizeof(hn));
+ if (parent)
+ strncpy(pn, parent, sizeof(pn));
+ strncpy(n, name, sizeof(n));
+
+ fetch.obj_type = obj_type;
+ fetch.hostname = hostname ? hn : NULL;
+ fetch.parent_type = parent_type;
+ fetch.parent = parent ? pn : NULL;
+ fetch.name = n;
+
+ status = sdb_plugin_query(SDB_AST_NODE(&fetch),
+ &interval_fetcher, SDB_OBJ(&obj), NULL, NULL);
+ if ((status < 0) || (lu.obj_type != obj_type) || (lu.last_update == 0)) {
+ *interval_out = 0;
+ return 0;
+ }
+
+ if (lu.last_update >= last_update) {
+ if (lu.last_update > last_update)
+ sdb_log(SDB_LOG_DEBUG, "memstore: Cannot update %s '%s' - "
+ "value too old (%"PRIsdbTIME" < %"PRIsdbTIME")",
+ SDB_STORE_TYPE_TO_NAME(obj_type), name,
+ lu.last_update, last_update);
+ *interval_out = lu.interval;
+ return 1;
+ }
+
+ interval = last_update - lu.last_update;
+ if (lu.interval && interval)
+ interval = (sdb_time_t)((0.9 * (double)lu.interval)
+ + (0.1 * (double)interval));
+ *interval_out = interval;
+ return 0;
+} /* get_interval */
+
+static void
+get_backend(char **backends, size_t *backends_num)
+{
+ const sdb_plugin_info_t *info;
+
+ info = sdb_plugin_current();
+ if ((! info) || (! info->plugin_name) || (! *info->plugin_name)) {
+ *backends_num = 0;
+ return;
+ }
+
+ backends[0] = info->plugin_name;
+ *backends_num = 1;
+} /* get_backend */
+
+/*
+ * public API
+ */
+
+int
+sdb_plugin_load(const char *basedir, const char *name,
+ const sdb_plugin_ctx_t *plugin_ctx)
+{
+ ctx_t *ctx;
+
+ int status;
+
+ if ((! name) || (! *name))
+ return -1;
+
+ if (! all_plugins) {
+ if (! (all_plugins = sdb_llist_create())) {
+ sdb_log(SDB_LOG_ERR, "core: Failed to load plugin '%s': "
+ "internal error while creating linked list", name);
+ return -1;
+ }
+ }
+
+ ctx = CTX(sdb_llist_search_by_name(all_plugins, name));
+ if (ctx) {
+ /* plugin already loaded */
+ if (! ctx->use_cnt) {
+ /* reloading plugin */
+ ctx_t *old_ctx = ctx_set(ctx);
+
+ status = module_init(ctx->info.plugin_name, ctx->handle, NULL);
+ ctx_set(old_ctx);
+ if (status)
+ return status;
+
+ sdb_log(SDB_LOG_INFO, "core: Successfully reloaded plugin "
+ "'%s' (%s)", ctx->info.plugin_name,
+ INFO_GET(&ctx->info, description));
+ }
+ ++ctx->use_cnt;
+ return 0;
+ }
+
+ return module_load(basedir, name, plugin_ctx);
+} /* sdb_plugin_load */
+
+int
+sdb_plugin_set_info(sdb_plugin_info_t *info, int type, ...)
+{
+ va_list ap;
+
+ if (! info)
+ return -1;
+
+ va_start(ap, type);
+
+ switch (type) {
+ case SDB_PLUGIN_INFO_DESC:
+ {
+ char *desc = va_arg(ap, char *);
+ if (desc) {
+ if (info->description)
+ free(info->description);
+ info->description = strdup(desc);
+ }
+ }
+ break;
+ case SDB_PLUGIN_INFO_COPYRIGHT:
+ {
+ char *copyright = va_arg(ap, char *);
+ if (copyright)
+ info->copyright = strdup(copyright);
+ }
+ break;
+ case SDB_PLUGIN_INFO_LICENSE:
+ {
+ char *license = va_arg(ap, char *);
+ if (license) {
+ if (info->license)
+ free(info->license);
+ info->license = strdup(license);
+ }
+ }
+ break;
+ case SDB_PLUGIN_INFO_VERSION:
+ {
+ int version = va_arg(ap, int);
+ info->version = version;
+ }
+ break;
+ case SDB_PLUGIN_INFO_PLUGIN_VERSION:
+ {
+ int version = va_arg(ap, int);
+ info->plugin_version = version;
+ }
break;
default:
va_end(ap);
} /* sdb_plugin_set_info */
int
-sdb_plugin_register_config(const char *name, sdb_plugin_config_cb callback)
+sdb_plugin_register_config(sdb_plugin_config_cb callback)
{
- return sdb_plugin_add_callback(&config_list, "init", name,
- callback, NULL);
+ ctx_t *ctx = ctx_get();
+
+ if (! ctx) {
+ sdb_log(SDB_LOG_ERR, "core: Invalid attempt to register a "
+ "config callback from outside a plugin");
+ return -1;
+ }
+ return plugin_add_impl(&config_list, callback_type, "config",
+ ctx->info.plugin_name, (void *)callback, NULL);
} /* sdb_plugin_register_config */
int
sdb_plugin_register_init(const char *name, sdb_plugin_init_cb callback,
sdb_object_t *user_data)
{
- return sdb_plugin_add_callback(&init_list, "init", name,
- callback, user_data);
+ char cb_name[1024];
+ return plugin_add_impl(&init_list, callback_type, "init",
+ plugin_get_name(name, cb_name, sizeof(cb_name)),
+ (void *)callback, user_data);
} /* sdb_plugin_register_init */
int
sdb_plugin_register_shutdown(const char *name, sdb_plugin_shutdown_cb callback,
sdb_object_t *user_data)
{
- return sdb_plugin_add_callback(&shutdown_list, "shutdown", name,
- callback, user_data);
+ char cb_name[1024];
+ return plugin_add_impl(&shutdown_list, callback_type, "shutdown",
+ plugin_get_name(name, cb_name, sizeof(cb_name)),
+ (void *)callback, user_data);
} /* sdb_plugin_register_shutdown */
int
sdb_plugin_register_log(const char *name, sdb_plugin_log_cb callback,
sdb_object_t *user_data)
{
- return sdb_plugin_add_callback(&log_list, "log", name, callback,
- user_data);
+ char cb_name[1024];
+ return plugin_add_impl(&log_list, callback_type, "log",
+ plugin_get_name(name, cb_name, sizeof(cb_name)),
+ callback, user_data);
} /* sdb_plugin_register_log */
+int
+sdb_plugin_register_cname(const char *name, sdb_plugin_cname_cb callback,
+ sdb_object_t *user_data)
+{
+ char cb_name[1024];
+ return plugin_add_impl(&cname_list, callback_type, "cname",
+ plugin_get_name(name, cb_name, sizeof(cb_name)),
+ callback, user_data);
+} /* sdb_plugin_register_cname */
+
int
sdb_plugin_register_collector(const char *name, sdb_plugin_collector_cb callback,
const sdb_time_t *interval, sdb_object_t *user_data)
{
+ char cb_name[1024];
sdb_object_t *obj;
if ((! name) || (! callback))
@@ -449,32 +1097,38 @@ sdb_plugin_register_collector(const char *name, sdb_plugin_collector_cb callback
if (! collector_list)
return -1;
- obj = sdb_object_create(name, sdb_plugin_collector_cb_type,
+ plugin_get_name(name, cb_name, sizeof(cb_name));
+
+ obj = sdb_object_create(cb_name, collector_type,
&collector_list, "collector", callback, user_data);
if (! obj)
return -1;
if (interval)
- SDB_PLUGIN_CCB(obj)->ccb_interval = *interval;
+ CCB(obj)->ccb_interval = *interval;
else {
- sdb_time_t tmp = sdb_plugin_get_ctx().interval;
+ ctx_t *ctx = ctx_get();
- if (tmp > 0)
- SDB_PLUGIN_CCB(obj)->ccb_interval = tmp;
- else
- SDB_PLUGIN_CCB(obj)->ccb_interval = 0;
+ if (! ctx) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot determine interval "
+ "for collector %s; none specified and no plugin "
+ "context found", cb_name);
+ return -1;
+ }
+
+ CCB(obj)->ccb_interval = ctx->public.interval;
}
- if (! (SDB_PLUGIN_CCB(obj)->ccb_next_update = sdb_gettime())) {
+ if (! (CCB(obj)->ccb_next_update = sdb_gettime())) {
char errbuf[1024];
- sdb_log(SDB_LOG_ERR, "plugin: Failed to determine current "
+ sdb_log(SDB_LOG_ERR, "core: Failed to determine current "
"time: %s", sdb_strerror(errno, errbuf, sizeof(errbuf)));
sdb_object_deref(obj);
return -1;
}
if (sdb_llist_insert_sorted(collector_list, obj,
- sdb_plugin_cmp_next_update)) {
+ plugin_cmp_next_update)) {
sdb_object_deref(obj);
return -1;
}
@@ -482,107 +1136,264 @@ sdb_plugin_register_collector(const char *name, sdb_plugin_collector_cb callback
/* pass control to the list */
sdb_object_deref(obj);
- sdb_log(SDB_LOG_INFO, "plugin: Registered collector callback '%s' "
- "(interval = %.3fs).", name,
- SDB_TIME_TO_DOUBLE(SDB_PLUGIN_CCB(obj)->ccb_interval));
+ sdb_log(SDB_LOG_INFO, "core: Registered collector callback '%s' "
+ "(interval = %.3fs).", cb_name,
+ SDB_TIME_TO_DOUBLE(CCB(obj)->ccb_interval));
return 0;
} /* sdb_plugin_register_collector */
+int
+sdb_plugin_register_timeseries_fetcher(const char *name,
+ sdb_timeseries_fetcher_t *fetcher, sdb_object_t *user_data)
+{
+ return plugin_add_impl(×eries_fetcher_list, ts_fetcher_type, "time-series fetcher",
+ name, fetcher, user_data);
+} /* sdb_plugin_register_timeseries_fetcher */
+
+int
+sdb_plugin_register_writer(const char *name,
+ sdb_store_writer_t *writer, sdb_object_t *user_data)
+{
+ char cb_name[1024];
+ return plugin_add_impl(&writer_list, writer_type, "store writer",
+ plugin_get_name(name, cb_name, sizeof(cb_name)),
+ writer, user_data);
+} /* sdb_store_register_writer */
+
+int
+sdb_plugin_register_reader(const char *name,
+ sdb_store_reader_t *reader, sdb_object_t *user_data)
+{
+ char cb_name[1024];
+ return plugin_add_impl(&reader_list, reader_type, "store reader",
+ plugin_get_name(name, cb_name, sizeof(cb_name)),
+ reader, user_data);
+} /* sdb_plugin_register_reader */
+
+void
+sdb_plugin_unregister_all(void)
+{
+ size_t i;
+
+ for (i = 0; i < SDB_STATIC_ARRAY_LEN(all_lists); ++i) {
+ const char *type = all_lists[i].type;
+ sdb_llist_t *list = *all_lists[i].list;
+
+ size_t len = sdb_llist_len(list);
+
+ if (! len)
+ continue;
+
+ sdb_llist_clear(list);
+ sdb_log(SDB_LOG_INFO, "core: Unregistered %zu %s callback%s",
+ len, type, len == 1 ? "" : "s");
+ }
+} /* sdb_plugin_unregister_all */
+
sdb_plugin_ctx_t
sdb_plugin_get_ctx(void)
{
- sdb_plugin_ctx_t *ctx;
-
- if (! plugin_ctx_key_initialized)
- sdb_plugin_ctx_init();
- ctx = pthread_getspecific(plugin_ctx_key);
+ ctx_t *c;
- if (! ctx)
- ctx = sdb_plugin_ctx_create();
- if (! ctx)
+ c = ctx_get();
+ if (! c) {
+ sdb_log(SDB_LOG_ERR, "core: Invalid read access to plugin "
+ "context outside a plugin");
return plugin_default_ctx;
- return *ctx;
+ }
+ return c->public;
} /* sdb_plugin_get_ctx */
-sdb_plugin_ctx_t
-sdb_plugin_set_ctx(sdb_plugin_ctx_t ctx)
+int
+sdb_plugin_set_ctx(sdb_plugin_ctx_t ctx, sdb_plugin_ctx_t *old)
{
- sdb_plugin_ctx_t *tmp;
- sdb_plugin_ctx_t old;
-
- if (! plugin_ctx_key_initialized)
- sdb_plugin_ctx_init();
- tmp = pthread_getspecific(plugin_ctx_key);
+ ctx_t *c;
- if (! tmp)
- tmp = sdb_plugin_ctx_create();
- if (! tmp)
- return plugin_default_ctx;
+ c = ctx_get();
+ if (! c) {
+ sdb_log(SDB_LOG_ERR, "core: Invalid write access to plugin "
+ "context outside a plugin");
+ return -1;
+ }
- old = *tmp;
- *tmp = ctx;
- return old;
+ if (old)
+ *old = c->public;
+ c->public = ctx;
+ return 0;
} /* sdb_plugin_set_ctx */
+const sdb_plugin_info_t *
+sdb_plugin_current(void)
+{
+ ctx_t *ctx = ctx_get();
+
+ if (! ctx)
+ return NULL;
+ return &ctx->info;
+} /* sdb_plugin_current */
+
int
sdb_plugin_configure(const char *name, oconfig_item_t *ci)
{
- sdb_plugin_cb_t *plugin;
+ callback_t *plugin;
sdb_plugin_config_cb callback;
- sdb_plugin_ctx_t old_ctx;
+ ctx_t *old_ctx;
int status;
if ((! name) || (! ci))
return -1;
- plugin = sdb_plugin_find_by_name(config_list, name);
+ plugin = CB(sdb_llist_search_by_name(config_list, name));
if (! plugin) {
- /* XXX: check if any such plugin has been loaded */
- sdb_log(SDB_LOG_ERR, "plugin: Plugin '%s' did not register "
- "a config callback.", name);
+ ctx_t *ctx = CTX(sdb_llist_search_by_name(all_plugins, name));
+ if (! ctx)
+ sdb_log(SDB_LOG_ERR, "core: Cannot configure unknown "
+ "plugin '%s'. Missing 'LoadPlugin \"%s\"'?",
+ name, name);
+ else
+ sdb_log(SDB_LOG_ERR, "core: Plugin '%s' did not register "
+ "a config callback.", name);
errno = ENOENT;
return -1;
}
- old_ctx = sdb_plugin_set_ctx(plugin->cb_ctx);
- callback = plugin->cb_callback;
+ old_ctx = ctx_set(plugin->cb_ctx);
+ callback = (sdb_plugin_config_cb)plugin->cb_callback;
status = callback(ci);
- sdb_plugin_set_ctx(old_ctx);
+ ctx_set(old_ctx);
return status;
} /* sdb_plugin_configure */
+int
+sdb_plugin_reconfigure_init(void)
+{
+ sdb_llist_iter_t *iter;
+
+ iter = sdb_llist_get_iter(config_list);
+ if (config_list && (! iter))
+ return -1;
+
+ /* deconfigure all plugins */
+ while (sdb_llist_iter_has_next(iter)) {
+ callback_t *plugin;
+ sdb_plugin_config_cb callback;
+ ctx_t *old_ctx;
+
+ plugin = CB(sdb_llist_iter_get_next(iter));
+ old_ctx = ctx_set(plugin->cb_ctx);
+ callback = (sdb_plugin_config_cb)plugin->cb_callback;
+ callback(NULL);
+ ctx_set(old_ctx);
+ }
+ sdb_llist_iter_destroy(iter);
+
+ iter = sdb_llist_get_iter(all_plugins);
+ if (all_plugins && (! iter))
+ return -1;
+
+ /* record all plugins as being unused */
+ while (sdb_llist_iter_has_next(iter))
+ CTX(sdb_llist_iter_get_next(iter))->use_cnt = 0;
+ sdb_llist_iter_destroy(iter);
+
+ sdb_plugin_unregister_all();
+ return 0;
+} /* sdb_plugin_reconfigure_init */
+
+int
+sdb_plugin_reconfigure_finish(void)
+{
+ sdb_llist_iter_t *iter;
+
+ iter = sdb_llist_get_iter(all_plugins);
+ if (all_plugins && (! iter))
+ return -1;
+
+ while (sdb_llist_iter_has_next(iter)) {
+ ctx_t *ctx = CTX(sdb_llist_iter_get_next(iter));
+ if (ctx->use_cnt)
+ continue;
+
+ sdb_log(SDB_LOG_INFO, "core: Module %s no longer in use",
+ ctx->info.plugin_name);
+ sdb_llist_iter_remove_current(iter);
+ plugin_unregister_by_name(ctx->info.plugin_name);
+ sdb_object_deref(SDB_OBJ(ctx));
+ }
+ sdb_llist_iter_destroy(iter);
+ return 0;
+} /* sdb_plugin_reconfigure_finish */
+
int
sdb_plugin_init_all(void)
{
sdb_llist_iter_t *iter;
+ int ret = 0;
iter = sdb_llist_get_iter(init_list);
while (sdb_llist_iter_has_next(iter)) {
+ callback_t *cb;
sdb_plugin_init_cb callback;
- sdb_plugin_ctx_t old_ctx;
+ ctx_t *old_ctx;
sdb_object_t *obj = sdb_llist_iter_get_next(iter);
assert(obj);
+ cb = CB(obj);
- callback = SDB_PLUGIN_CB(obj)->cb_callback;
+ callback = (sdb_plugin_init_cb)cb->cb_callback;
- old_ctx = sdb_plugin_set_ctx(SDB_PLUGIN_CB(obj)->cb_ctx);
- if (callback(SDB_PLUGIN_CB(obj)->cb_user_data)) {
- /* XXX: unload plugin */
+ old_ctx = ctx_set(cb->cb_ctx);
+ if (callback(cb->cb_user_data)) {
+ sdb_log(SDB_LOG_ERR, "core: Failed to initialize plugin "
+ "'%s'. Unregistering all callbacks.", obj->name);
+ ctx_set(old_ctx);
+ plugin_unregister_by_name(cb->cb_ctx->info.plugin_name);
+ ++ret;
}
- sdb_plugin_set_ctx(old_ctx);
+ else
+ ctx_set(old_ctx);
}
sdb_llist_iter_destroy(iter);
- return 0;
+ return ret;
} /* sdb_plugin_init_all */
+int
+sdb_plugin_shutdown_all(void)
+{
+ sdb_llist_iter_t *iter;
+ int ret = 0;
+
+ iter = sdb_llist_get_iter(shutdown_list);
+ while (sdb_llist_iter_has_next(iter)) {
+ callback_t *cb;
+ sdb_plugin_shutdown_cb callback;
+ ctx_t *old_ctx;
+
+ sdb_object_t *obj = sdb_llist_iter_get_next(iter);
+ assert(obj);
+ cb = CB(obj);
+
+ callback = (sdb_plugin_shutdown_cb)cb->cb_callback;
+
+ old_ctx = ctx_set(cb->cb_ctx);
+ if (callback(cb->cb_user_data)) {
+ sdb_log(SDB_LOG_ERR, "core: Failed to shutdown plugin '%s'.",
+ obj->name);
+ ++ret;
+ }
+ ctx_set(old_ctx);
+ }
+ sdb_llist_iter_destroy(iter);
+ return ret;
+} /* sdb_plugin_shutdown_all */
+
int
sdb_plugin_collector_loop(sdb_plugin_loop_t *loop)
{
if (! collector_list) {
- sdb_log(SDB_LOG_WARNING, "plugin: No collectors registered. "
+ sdb_log(SDB_LOG_WARNING, "core: No collectors registered. "
"Quiting main loop.");
return -1;
}
while (loop->do_loop) {
sdb_plugin_collector_cb callback;
- sdb_plugin_ctx_t old_ctx;
+ ctx_t *old_ctx;
sdb_time_t interval, now;
if (! obj)
return -1;
- callback = SDB_PLUGIN_CCB(obj)->ccb_callback;
+ callback = (sdb_plugin_collector_cb)CCB(obj)->ccb_callback;
if (! (now = sdb_gettime())) {
char errbuf[1024];
- sdb_log(SDB_LOG_ERR, "plugin: Failed to determine current "
- "time: %s", sdb_strerror(errno, errbuf, sizeof(errbuf)));
- now = SDB_PLUGIN_CCB(obj)->ccb_next_update;
+ sdb_log(SDB_LOG_ERR, "core: Failed to determine current "
+ "time in collector main loop: %s",
+ sdb_strerror(errno, errbuf, sizeof(errbuf)));
+ now = CCB(obj)->ccb_next_update;
}
- if (now < SDB_PLUGIN_CCB(obj)->ccb_next_update) {
- interval = SDB_PLUGIN_CCB(obj)->ccb_next_update - now;
+ if (now < CCB(obj)->ccb_next_update) {
+ interval = CCB(obj)->ccb_next_update - now;
errno = 0;
while (loop->do_loop && sdb_sleep(interval, &interval)) {
if (errno != EINTR) {
char errbuf[1024];
- sdb_log(SDB_LOG_ERR, "plugin: Failed to sleep: %s",
+ sdb_log(SDB_LOG_ERR, "core: Failed to sleep "
+ "in collector main loop: %s",
sdb_strerror(errno, errbuf, sizeof(errbuf)));
+ sdb_llist_insert_sorted(collector_list, obj,
+ plugin_cmp_next_update);
+ sdb_object_deref(obj);
return -1;
}
errno = 0;
}
- if (! loop->do_loop)
+ if (! loop->do_loop) {
+ /* put back; don't worry about errors */
+ sdb_llist_insert_sorted(collector_list, obj,
+ plugin_cmp_next_update);
+ sdb_object_deref(obj);
return 0;
+ }
}
- old_ctx = sdb_plugin_set_ctx(SDB_PLUGIN_CCB(obj)->ccb_ctx);
- if (callback(SDB_PLUGIN_CCB(obj)->ccb_user_data)) {
+ old_ctx = ctx_set(CCB(obj)->ccb_ctx);
+ if (callback(CCB(obj)->ccb_user_data)) {
/* XXX */
}
- sdb_plugin_set_ctx(old_ctx);
+ ctx_set(old_ctx);
- interval = SDB_PLUGIN_CCB(obj)->ccb_interval;
+ interval = CCB(obj)->ccb_interval;
if (! interval)
interval = loop->default_interval;
if (! interval) {
- sdb_log(SDB_LOG_WARNING, "plugin: No interval configured "
+ sdb_log(SDB_LOG_WARNING, "core: No interval configured "
"for plugin '%s'; skipping any further "
"iterations.", obj->name);
sdb_object_deref(obj);
continue;
}
- SDB_PLUGIN_CCB(obj)->ccb_next_update += interval;
+ CCB(obj)->ccb_next_update += interval;
if (! (now = sdb_gettime())) {
char errbuf[1024];
- sdb_log(SDB_LOG_ERR, "plugin: Failed to determine current "
- "time: %s", sdb_strerror(errno, errbuf, sizeof(errbuf)));
- now = SDB_PLUGIN_CCB(obj)->ccb_next_update;
+ sdb_log(SDB_LOG_ERR, "core: Failed to determine current "
+ "time in collector main loop: %s",
+ sdb_strerror(errno, errbuf, sizeof(errbuf)));
+ now = CCB(obj)->ccb_next_update;
}
- if (now > SDB_PLUGIN_CCB(obj)->ccb_next_update) {
- sdb_log(SDB_LOG_WARNING, "plugin: Plugin '%s' took too "
+ if (now > CCB(obj)->ccb_next_update) {
+ sdb_log(SDB_LOG_WARNING, "core: Plugin '%s' took too "
"long; skipping iterations to keep up.",
obj->name);
- SDB_PLUGIN_CCB(obj)->ccb_next_update = now;
+ CCB(obj)->ccb_next_update = now;
}
if (sdb_llist_insert_sorted(collector_list, obj,
- sdb_plugin_cmp_next_update)) {
- sdb_log(SDB_LOG_ERR, "plugin: Failed to re-insert "
+ plugin_cmp_next_update)) {
+ sdb_log(SDB_LOG_ERR, "core: Failed to re-insert "
"plugin '%s' into collector list. Unable to further "
"use the plugin.",
obj->name);
return 0;
} /* sdb_plugin_read_loop */
+char *
+sdb_plugin_cname(char *hostname)
+{
+ sdb_llist_iter_t *iter;
+
+ if (! hostname)
+ return NULL;
+
+ if (! cname_list)
+ return hostname;
+
+ iter = sdb_llist_get_iter(cname_list);
+ while (sdb_llist_iter_has_next(iter)) {
+ sdb_plugin_cname_cb callback;
+ char *cname;
+
+ sdb_object_t *obj = sdb_llist_iter_get_next(iter);
+ assert(obj);
+
+ callback = (sdb_plugin_cname_cb)CB(obj)->cb_callback;
+ cname = callback(hostname, CB(obj)->cb_user_data);
+ if (cname) {
+ free(hostname);
+ hostname = cname;
+ }
+ /* else: don't change hostname */
+ }
+ sdb_llist_iter_destroy(iter);
+ return hostname;
+} /* sdb_plugin_cname */
+
int
sdb_plugin_log(int prio, const char *msg)
{
sdb_llist_iter_t *iter;
int ret = -1;
- if (! log_list)
- return fprintf(stderr, "[%s] %s\n", SDB_LOG_PRIO_TO_STRING(prio), msg);
+ bool logged = 0;
+
+ if (! msg)
+ return 0;
iter = sdb_llist_get_iter(log_list);
while (sdb_llist_iter_has_next(iter)) {
sdb_object_t *obj = sdb_llist_iter_get_next(iter);
assert(obj);
- callback = SDB_PLUGIN_CB(obj)->cb_callback;
- tmp = callback(prio, msg, SDB_PLUGIN_CB(obj)->cb_user_data);
+ callback = (sdb_plugin_log_cb)CB(obj)->cb_callback;
+ tmp = callback(prio, msg, CB(obj)->cb_user_data);
if (tmp > ret)
ret = tmp;
+
+ if (CB(obj)->cb_ctx)
+ logged = 1;
+ /* else: this is an internally registered callback */
}
sdb_llist_iter_destroy(iter);
+
+ if (! logged)
+ return fprintf(stderr, "[%s] %s\n", SDB_LOG_PRIO_TO_STRING(prio), msg);
return ret;
} /* sdb_plugin_log */
+int
+sdb_plugin_vlogf(int prio, const char *fmt, va_list ap)
+{
+ sdb_strbuf_t *buf;
+ int ret;
+
+ if (! fmt)
+ return 0;
+
+ buf = sdb_strbuf_create(64);
+ if (! buf) {
+ ret = fprintf(stderr, "[%s] ", SDB_LOG_PRIO_TO_STRING(prio));
+ ret += vfprintf(stderr, fmt, ap);
+ return ret;
+ }
+
+ if (sdb_strbuf_vsprintf(buf, fmt, ap) < 0) {
+ sdb_strbuf_destroy(buf);
+ return -1;
+ }
+
+ ret = sdb_plugin_log(prio, sdb_strbuf_string(buf));
+ sdb_strbuf_destroy(buf);
+ return ret;
+} /* sdb_plugin_vlogf */
+
+int
+sdb_plugin_logf(int prio, const char *fmt, ...)
+{
+ va_list ap;
+ int ret;
+
+ if (! fmt)
+ return 0;
+
+ va_start(ap, fmt);
+ ret = sdb_plugin_vlogf(prio, fmt, ap);
+ va_end(ap);
+ return ret;
+} /* sdb_plugin_logf */
+
+sdb_timeseries_t *
+sdb_plugin_fetch_timeseries(const char *type, const char *id,
+ sdb_timeseries_opts_t *opts)
+{
+ ts_fetcher_t *fetcher;
+ sdb_timeseries_t *ts;
+
+ ctx_t *old_ctx;
+
+ if ((! type) || (! id) || (! opts))
+ return NULL;
+
+ fetcher = TS_FETCHER(sdb_llist_search_by_name(timeseries_fetcher_list, type));
+ if (! fetcher) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot fetch time-series of type %s: "
+ "no such plugin loaded", type);
+ errno = ENOENT;
+ return NULL;
+ }
+
+ old_ctx = ctx_set(fetcher->ts_ctx);
+ ts = fetcher->impl.fetch(id, opts, fetcher->ts_user_data);
+ ctx_set(old_ctx);
+ return ts;
+} /* sdb_plugin_fetch_timeseries */
+
+sdb_timeseries_info_t *
+sdb_plugin_describe_timeseries(const char *type, const char *id)
+{
+ ts_fetcher_t *fetcher;
+ sdb_timeseries_info_t *ts_info;
+
+ ctx_t *old_ctx;
+
+ if ((! type) || (! id))
+ return NULL;
+
+ fetcher = TS_FETCHER(sdb_llist_search_by_name(timeseries_fetcher_list, type));
+ if (! fetcher) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot describe time-series of type %s: "
+ "no such plugin loaded", type);
+ errno = ENOENT;
+ return NULL;
+ }
+
+ old_ctx = ctx_set(fetcher->ts_ctx);
+ ts_info = fetcher->impl.describe(id, fetcher->ts_user_data);
+ ctx_set(old_ctx);
+ return ts_info;
+} /* sdb_plugin_describe_timeseries */
+
+int
+sdb_plugin_query(sdb_ast_node_t *ast,
+ sdb_store_writer_t *w, sdb_object_t *wd,
+ sdb_query_opts_t *opts, sdb_strbuf_t *errbuf)
+{
+ query_writer_t qw = QUERY_WRITER_INIT(w, wd);
+ reader_t *reader;
+ sdb_object_t *q;
+
+ size_t n = sdb_llist_len(reader_list);
+ int status = 0;
+
+ if (! ast)
+ return 0;
+
+ if (opts)
+ qw.opts = *opts;
+
+ if ((ast->type != SDB_AST_TYPE_FETCH)
+ && (ast->type != SDB_AST_TYPE_LIST)
+ && (ast->type != SDB_AST_TYPE_LOOKUP)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot execute query of type %s",
+ SDB_AST_TYPE_TO_STRING(ast));
+ sdb_strbuf_sprintf(errbuf, "Cannot execute query of type %s",
+ SDB_AST_TYPE_TO_STRING(ast));
+ return -1;
+ }
+
+ if (n != 1) {
+ char *msg = (n > 0)
+ ? "Cannot execute query: multiple readers not supported"
+ : "Cannot execute query: no readers registered";
+ sdb_strbuf_sprintf(errbuf, "%s", msg);
+ sdb_log(SDB_LOG_ERR, "core: %s", msg);
+ return -1;
+ }
+
+ reader = READER(sdb_llist_get(reader_list, 0));
+ assert(reader);
+
+ q = reader->impl.prepare_query(ast, errbuf, reader->r_user_data);
+ if (q)
+ status = reader->impl.execute_query(q, &query_writer, SDB_OBJ(&qw),
+ errbuf, reader->r_user_data);
+ else
+ status = -1;
+
+ sdb_object_deref(SDB_OBJ(q));
+ sdb_object_deref(SDB_OBJ(reader));
+ return status;
+} /* sdb_plugin_query */
+
+int
+sdb_plugin_store_host(const char *name, sdb_time_t last_update)
+{
+ sdb_store_host_t host = SDB_STORE_HOST_INIT;
+ char *backends[1];
+ char *cname;
+
+ sdb_llist_iter_t *iter;
+ int status = 0;
+
+ if (! name)
+ return -1;
+
+ if (! sdb_llist_len(writer_list)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot store host: "
+ "no writers registered");
+ return -1;
+ }
+
+ cname = sdb_plugin_cname(strdup(name));
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "core: strdup failed");
+ return -1;
+ }
+
+ host.name = cname;
+ host.last_update = last_update ? last_update : sdb_gettime();
+ if (get_interval(SDB_HOST, NULL, -1, NULL, cname,
+ host.last_update, &host.interval)) {
+ free(cname);
+ return 1;
+ }
+ host.backends = (const char * const *)backends;
+ get_backend(backends, &host.backends_num);
+
+ iter = sdb_llist_get_iter(writer_list);
+ while (sdb_llist_iter_has_next(iter)) {
+ writer_t *writer = WRITER(sdb_llist_iter_get_next(iter));
+ int s;
+ assert(writer);
+ s = writer->impl.store_host(&host, writer->w_user_data);
+ if (((s > 0) && (status >= 0)) || (s < 0))
+ status = s;
+ }
+ sdb_llist_iter_destroy(iter);
+ free(cname);
+ return status;
+} /* sdb_plugin_store_host */
+
+int
+sdb_plugin_store_service(const char *hostname, const char *name,
+ sdb_time_t last_update)
+{
+ sdb_store_service_t service = SDB_STORE_SERVICE_INIT;
+ char *backends[1];
+ char *cname;
+
+ sdb_llist_iter_t *iter;
+ sdb_data_t d;
+
+ int status = 0;
+
+ if ((! hostname) || (! name))
+ return -1;
+
+ if (! sdb_llist_len(writer_list)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot store service: "
+ "no writers registered");
+ return -1;
+ }
+
+ cname = sdb_plugin_cname(strdup(hostname));
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "core: strdup failed");
+ return -1;
+ }
+
+ service.hostname = cname;
+ service.name = name;
+ service.last_update = last_update ? last_update : sdb_gettime();
+ if (get_interval(SDB_SERVICE, cname, -1, NULL, name,
+ service.last_update, &service.interval)) {
+ free(cname);
+ return 1;
+ }
+ service.backends = (const char * const *)backends;
+ get_backend(backends, &service.backends_num);
+
+ iter = sdb_llist_get_iter(writer_list);
+ while (sdb_llist_iter_has_next(iter)) {
+ writer_t *writer = WRITER(sdb_llist_iter_get_next(iter));
+ int s;
+ assert(writer);
+ s = writer->impl.store_service(&service, writer->w_user_data);
+ if (((s > 0) && (status >= 0)) || (s < 0))
+ status = s;
+ }
+ sdb_llist_iter_destroy(iter);
+
+ if (! status) {
+ /* record the hostname as an attribute */
+ d.type = SDB_TYPE_STRING;
+ d.data.string = cname;
+ if (sdb_plugin_store_service_attribute(cname, name,
+ "hostname", &d, service.last_update))
+ status = -1;
+ }
+
+ free(cname);
+ return status;
+} /* sdb_plugin_store_service */
+
+int
+sdb_plugin_store_metric(const char *hostname, const char *name,
+ sdb_metric_store_t *store, sdb_time_t last_update)
+{
+ sdb_store_metric_t metric = SDB_STORE_METRIC_INIT;
+ char *backends[1];
+ char *cname;
+
+ sdb_llist_iter_t *iter;
+ sdb_data_t d;
+
+ int status = 0;
+
+ if ((! hostname) || (! name))
+ return -1;
+
+ if (! sdb_llist_len(writer_list)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot store metric: "
+ "no writers registered");
+ return -1;
+ }
+
+ cname = sdb_plugin_cname(strdup(hostname));
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "core: strdup failed");
+ return -1;
+ }
+
+ if (store && ((! store->type) || (! store->id)))
+ store = NULL;
+
+ metric.hostname = cname;
+ metric.name = name;
+ if (store) {
+ if (store->last_update < last_update)
+ store->last_update = last_update;
+ metric.stores = store;
+ metric.stores_num = 1;
+ }
+ metric.last_update = last_update ? last_update : sdb_gettime();
+ if (get_interval(SDB_METRIC, cname, -1, NULL, name,
+ metric.last_update, &metric.interval)) {
+ free(cname);
+ return 1;
+ }
+ metric.backends = (const char * const *)backends;
+ get_backend(backends, &metric.backends_num);
+
+ iter = sdb_llist_get_iter(writer_list);
+ while (sdb_llist_iter_has_next(iter)) {
+ writer_t *writer = WRITER(sdb_llist_iter_get_next(iter));
+ int s;
+ assert(writer);
+ s = writer->impl.store_metric(&metric, writer->w_user_data);
+ if (((s > 0) && (status >= 0)) || (s < 0))
+ status = s;
+ }
+ sdb_llist_iter_destroy(iter);
+
+ if (! status) {
+ /* record the hostname as an attribute */
+ d.type = SDB_TYPE_STRING;
+ d.data.string = cname;
+ if (sdb_plugin_store_metric_attribute(cname, name,
+ "hostname", &d, metric.last_update))
+ status = -1;
+ }
+
+ free(cname);
+ return status;
+} /* sdb_plugin_store_metric */
+
+int
+sdb_plugin_store_attribute(const char *hostname, const char *key,
+ const sdb_data_t *value, sdb_time_t last_update)
+{
+ sdb_store_attribute_t attr = SDB_STORE_ATTRIBUTE_INIT;
+ char *backends[1];
+ char *cname;
+
+ sdb_llist_iter_t *iter;
+ int status = 0;
+
+ if ((! hostname) || (! key) || (! value))
+ return -1;
+
+ if (! sdb_llist_len(writer_list)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot store attribute: "
+ "no writers registered");
+ return -1;
+ }
+
+ cname = sdb_plugin_cname(strdup(hostname));
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "core: strdup failed");
+ return -1;
+ }
+
+ attr.parent_type = SDB_HOST;
+ attr.parent = cname;
+ attr.key = key;
+ attr.value = *value;
+ attr.last_update = last_update ? last_update : sdb_gettime();
+ if (get_interval(SDB_ATTRIBUTE, cname, -1, NULL, key,
+ attr.last_update, &attr.interval)) {
+ free(cname);
+ return 1;
+ }
+ attr.backends = (const char * const *)backends;
+ get_backend(backends, &attr.backends_num);
+
+ iter = sdb_llist_get_iter(writer_list);
+ while (sdb_llist_iter_has_next(iter)) {
+ writer_t *writer = WRITER(sdb_llist_iter_get_next(iter));
+ int s;
+ assert(writer);
+ s = writer->impl.store_attribute(&attr, writer->w_user_data);
+ if (((s > 0) && (status >= 0)) || (s < 0))
+ status = s;
+ }
+ sdb_llist_iter_destroy(iter);
+ free(cname);
+ return status;
+} /* sdb_plugin_store_attribute */
+
+int
+sdb_plugin_store_service_attribute(const char *hostname, const char *service,
+ const char *key, const sdb_data_t *value, sdb_time_t last_update)
+{
+ sdb_store_attribute_t attr = SDB_STORE_ATTRIBUTE_INIT;
+ char *backends[1];
+ char *cname;
+
+ sdb_llist_iter_t *iter;
+ int status = 0;
+
+ if ((! hostname) || (! service) || (! key) || (! value))
+ return -1;
+
+ if (! sdb_llist_len(writer_list)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot store service attribute: "
+ "no writers registered");
+ return -1;
+ }
+
+ cname = sdb_plugin_cname(strdup(hostname));
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "core: strdup failed");
+ return -1;
+ }
+
+ attr.hostname = cname;
+ attr.parent_type = SDB_SERVICE;
+ attr.parent = service;
+ attr.key = key;
+ attr.value = *value;
+ attr.last_update = last_update ? last_update : sdb_gettime();
+ if (get_interval(SDB_ATTRIBUTE, cname, SDB_SERVICE, service, key,
+ attr.last_update, &attr.interval)) {
+ free(cname);
+ return 1;
+ }
+ attr.backends = (const char * const *)backends;
+ get_backend(backends, &attr.backends_num);
+
+ iter = sdb_llist_get_iter(writer_list);
+ while (sdb_llist_iter_has_next(iter)) {
+ writer_t *writer = WRITER(sdb_llist_iter_get_next(iter));
+ int s;
+ assert(writer);
+ s = writer->impl.store_attribute(&attr, writer->w_user_data);
+ if (((s > 0) && (status >= 0)) || (s < 0))
+ status = s;
+ }
+ sdb_llist_iter_destroy(iter);
+ free(cname);
+ return status;
+} /* sdb_plugin_store_service_attribute */
+
+int
+sdb_plugin_store_metric_attribute(const char *hostname, const char *metric,
+ const char *key, const sdb_data_t *value, sdb_time_t last_update)
+{
+ sdb_store_attribute_t attr = SDB_STORE_ATTRIBUTE_INIT;
+ char *backends[1];
+ char *cname;
+
+ sdb_llist_iter_t *iter;
+ int status = 0;
+
+ if ((! hostname) || (! metric) || (! key) || (! value))
+ return -1;
+
+ if (! sdb_llist_len(writer_list)) {
+ sdb_log(SDB_LOG_ERR, "core: Cannot store metric attribute: "
+ "no writers registered");
+ return -1;
+ }
+
+ cname = sdb_plugin_cname(strdup(hostname));
+ if (! cname) {
+ sdb_log(SDB_LOG_ERR, "core: strdup failed");
+ return -1;
+ }
+
+ attr.hostname = cname;
+ attr.parent_type = SDB_METRIC;
+ attr.parent = metric;
+ attr.key = key;
+ attr.value = *value;
+ attr.last_update = last_update ? last_update : sdb_gettime();
+ if (get_interval(SDB_ATTRIBUTE, cname, SDB_METRIC, metric, key,
+ attr.last_update, &attr.interval)) {
+ free(cname);
+ return 1;
+ }
+ attr.backends = (const char * const *)backends;
+ get_backend(backends, &attr.backends_num);
+
+ iter = sdb_llist_get_iter(writer_list);
+ while (sdb_llist_iter_has_next(iter)) {
+ writer_t *writer = WRITER(sdb_llist_iter_get_next(iter));
+ int s;
+ assert(writer);
+ s = writer->impl.store_attribute(&attr, writer->w_user_data);
+ if (((s > 0) && (status >= 0)) || (s < 0))
+ status = s;
+ }
+ sdb_llist_iter_destroy(iter);
+ free(cname);
+ return status;
+} /* sdb_plugin_store_metric_attribute */
+
/* vim: set tw=78 sw=4 ts=4 noexpandtab : */