extern int wait_reply(int fd, int tmo);
extern int connect_monitor(char *devname);
extern int ping_monitor(char *devname);
+extern int ping_monitor_by_id(int devnum);
extern int block_subarray(struct mdinfo *sra);
extern int unblock_subarray(struct mdinfo *sra, const int unfreeze);
extern int block_monitor(char *container, const int freeze);