ceph_monc_get_version_async
int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what,
EXPORT_SYMBOL(ceph_monc_get_version_async);
ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",