-DEFINE_MUTEX(probes_mutex);
-
-static LIST_HEAD(probes_registered_list);
-
-int ltt_marker_connect(const char *channel, const char *mname,
- const char *pname)
-
-{
- int ret;
- struct ltt_active_marker *pdata;
- struct ltt_available_probe *probe;
-
- ltt_lock_traces();
- mutex_lock(&probes_mutex);
- probe = get_probe_from_name(pname);
- if (!probe) {
- ret = -ENOENT;
- goto end;
- }
- pdata = marker_get_private_data(channel, mname, probe->probe_func, 0);
- if (pdata && !IS_ERR(pdata)) {
- ret = -EEXIST;
- goto end;
- }
- pdata = kmem_cache_zalloc(markers_loaded_cachep, GFP_KERNEL);
- if (!pdata) {
- ret = -ENOMEM;
- goto end;
- }
- pdata->probe = probe;
- /*
- * ID has priority over channel in case of conflict.
- */
- ret = marker_probe_register(channel, mname, NULL,
- probe->probe_func, pdata);
- if (ret)
- kmem_cache_free(markers_loaded_cachep, pdata);
- else
- list_add(&pdata->node, &markers_loaded_list);
-end:
- mutex_unlock(&probes_mutex);
- ltt_unlock_traces();
- return ret;
-}
-
-
-int ltt_probe_register(struct ltt_available_probe *pdata)
-{
- int ret = 0;
- int comparison;
- struct ltt_available_probe *iter;
-
- mutex_lock(&probes_mutex);
- list_for_each_entry_reverse(iter, &probes_registered_list, node) {
- comparison = strcmp(pdata->name, iter->name);
- if (!comparison) {
- ret = -EBUSY;
- goto end;
- } else if (comparison > 0) {
- /* We belong to the location right after iter. */
- list_add(&pdata->node, &iter->node);
- goto end;
- }
- }
- /* Should be added at the head of the list */
- list_add(&pdata->node, &probes_registered_list);
-end:
- mutex_unlock(&probes_mutex);
- return ret;
-}
-
-
-struct ltt_available_probe default_probe = {
- .name = "default",
- .format = NULL,
- .probe_func = ltt_vtrace,
- .callbacks[0] = ltt_serialize_data,
-};
-