--- /dev/null
+/*
+ * ltt-probes.c
+ *
+ * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * Holds LTTng probes registry.
+ *
+ * Dual LGPL v2.1/GPL v2 license.
+ */
+
+#include <string.h>
+#include <errno.h>
+#include <urcu/list.h>
+#include <lttng/core.h>
+#include <lttng/ust-events.h>
+
+#include "ltt-tracer-core.h"
+
+/*
+ * probe list is protected by ust_lock()/ust_unlock().
+ */
+static CDS_LIST_HEAD(probe_list);
+
+static
+const struct lttng_event_desc *find_event(const char *name)
+{
+ struct lttng_probe_desc *probe_desc;
+ int i;
+
+ cds_list_for_each_entry(probe_desc, &probe_list, head) {
+ for (i = 0; i < probe_desc->nr_events; i++) {
+ if (!strcmp(probe_desc->event_desc[i].name, name))
+ return &probe_desc->event_desc[i];
+ }
+ }
+ return NULL;
+}
+
+int ltt_probe_register(struct lttng_probe_desc *desc)
+{
+ int ret = 0;
+ int i;
+
+ ust_lock();
+ /*
+ * TODO: This is O(N^2). Turn into a hash table when probe registration
+ * overhead becomes an issue.
+ */
+ for (i = 0; i < desc->nr_events; i++) {
+ if (find_event(desc->event_desc[i].name)) {
+ ret = -EEXIST;
+ goto end;
+ }
+ }
+ cds_list_add(&desc->head, &probe_list);
+
+ /*
+ * fix the events awaiting probe load.
+ */
+ for (i = 0; i < desc->nr_events; i++) {
+ ret = pending_probe_fix_events(&desc->event_desc[i]);
+ assert(!ret);
+ }
+end:
+ ust_unlock();
+ return ret;
+}
+
+void ltt_probe_unregister(struct lttng_probe_desc *desc)
+{
+ ust_lock();
+ cds_list_del(&desc->head);
+ ust_unlock();
+}
+
+/*
+ * called with UST lock held.
+ */
+const struct lttng_event_desc *ltt_event_get(const char *name)
+{
+ const struct lttng_event_desc *event;
+
+ event = find_event(name);
+ if (!event)
+ return NULL;
+ return event;
+}
+
+void ltt_event_put(const struct lttng_event_desc *event)
+{
+}
+
+#if 0
+static
+void *tp_list_start(struct seq_file *m, loff_t *pos)
+{
+ struct lttng_probe_desc *probe_desc;
+ int iter = 0, i;
+
+ pthread_mutex_lock(&probe_mutex);
+ cds_list_for_each_entry(probe_desc, &probe_list, head) {
+ for (i = 0; i < probe_desc->nr_events; i++) {
+ if (iter++ >= *pos)
+ return (void *) &probe_desc->event_desc[i];
+ }
+ }
+ /* End of list */
+ return NULL;
+}
+
+static
+void *tp_list_next(struct seq_file *m, void *p, loff_t *ppos)
+{
+ struct lttng_probe_desc *probe_desc;
+ int iter = 0, i;
+
+ (*ppos)++;
+ cds_list_for_each_entry(probe_desc, &probe_list, head) {
+ for (i = 0; i < probe_desc->nr_events; i++) {
+ if (iter++ >= *ppos)
+ return (void *) &probe_desc->event_desc[i];
+ }
+ }
+ /* End of list */
+ return NULL;
+}
+
+static
+void tp_list_stop(struct seq_file *m, void *p)
+{
+ pthread_mutex_unlock(&probe_mutex);
+}
+
+static
+int tp_list_show(struct seq_file *m, void *p)
+{
+ const struct lttng_event_desc *probe_desc = p;
+
+ /*
+ * Don't export lttng internal events (metadata).
+ */
+ if (!strncmp(probe_desc->name, "lttng_", sizeof("lttng_") - 1))
+ return 0;
+ seq_printf(m, "event { name = %s; };\n",
+ probe_desc->name);
+ return 0;
+}
+
+static
+const struct seq_operations lttng_tracepoint_list_seq_ops = {
+ .start = tp_list_start,
+ .next = tp_list_next,
+ .stop = tp_list_stop,
+ .show = tp_list_show,
+};
+
+static
+int lttng_tracepoint_list_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, <tng_tracepoint_list_seq_ops);
+}
+
+const struct file_operations lttng_tracepoint_list_fops = {
+ .open = lttng_tracepoint_list_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+#endif //0