+static int ust_tracker_type_support(enum lttng_tracker_type *tracker_type)
+{
+ int ret;
+
+ switch (*tracker_type) {
+ case LTTNG_TRACKER_PID:
+ *tracker_type = LTTNG_TRACKER_VPID;
+ ret = 0;
+ break;
+ case LTTNG_TRACKER_VPID:
+ case LTTNG_TRACKER_VUID:
+ case LTTNG_TRACKER_VGID:
+ ret = 0;
+ break;
+ case LTTNG_TRACKER_UID:
+ case LTTNG_TRACKER_GID:
+ ERR("The %s tracker is invalid for UST domain.",
+ get_tracker_str(*tracker_type));
+ ret = -1;
+ break;
+ default:
+ ret = -1;
+ break;
+ }
+
+ return ret;
+}
+