propagate_bootblock
retval = propagate_bootblock(&curr_data, &attach_data, updt_str);
static int propagate_bootblock(ib_data_t *, ib_data_t *, char *);
static int propagate_bootblock(ig_data_t *, ig_data_t *, char *);
retval = propagate_bootblock(&curr_data, &attach_data, updt_str);