Function ceph_release_from_features

src/common/ceph_strings.cc:176–194

return oldest/first release that supports these features */

/* return oldest/first release that supports these features */
int ceph_release_from_features(uint64_t features)
{
	int r = 1;
	while (true) {
		uint64_t need = ceph_release_features(r);
		if ((need & features) != need ||
		    r == CEPH_RELEASE_MAX) {
			r--;
			need = ceph_release_features(r);
			/* we want the first release that looks like this */
			while (r > 1 && ceph_release_features(r - 1) == need) {
				r--;
			}
			break;
		}
		++r;
	}
	return r;
}

const char *ceph_osd_watch_op_name(int o)
{