-extern int ustcmd_set_marker_state(const char *channel, const char *marker,
-int state, pid_t pid);
-extern int ustcmd_set_subbuf_size(const char *channel, unsigned int subbuf_size,
+extern int ustcmd_set_marker_state(const char *trace, const char *channel,
+ const char *marker, int state, pid_t pid);
+extern int ustcmd_set_subbuf_size(const char *trace, const char *channel,
+ unsigned int subbuf_size, pid_t pid);
+extern int ustcmd_set_subbuf_num(const char *trace, const char *channel,
+ unsigned int num, pid_t pid);
+extern int ustcmd_get_subbuf_size(const char *trace, const char *channel,