int ust_create_trace(struct command_ctx *cmd_ctx);
int ust_start_trace(struct command_ctx *cmd_ctx);
int ust_stop_trace(struct command_ctx *cmd_ctx);
int ust_create_trace(struct command_ctx *cmd_ctx);
int ust_start_trace(struct command_ctx *cmd_ctx);
int ust_stop_trace(struct command_ctx *cmd_ctx);