+#define CEPH_FEATURE_MSGR_KEEPALIVE2 (1ULL<<42)
+#define CEPH_FEATURE_OSD_POOLRESEND (1ULL<<43)
+#define CEPH_FEATURE_ERASURE_CODE_PLUGINS_V2 (1ULL<<44)
+#define CEPH_FEATURE_OSD_SET_ALLOC_HINT (1ULL<<45)
+#define CEPH_FEATURE_OSD_FADVISE_FLAGS (1ULL<<46)
+#define CEPH_FEATURE_OSD_REPOP (1ULL<<46) /* overlap with fadvise */
+#define CEPH_FEATURE_OSD_OBJECT_DIGEST (1ULL<<46) /* overlap with fadvise */
+#define CEPH_FEATURE_OSD_TRANSACTION_MAY_LAYOUT (1ULL<<46) /* overlap w/ fadvise */
+#define CEPH_FEATURE_MDS_QUOTA (1ULL<<47)
+#define CEPH_FEATURE_CRUSH_V4 (1ULL<<48) /* straw2 buckets */
+#define CEPH_FEATURE_OSD_MIN_SIZE_RECOVERY (1ULL<<49)
+// duplicated since it was introduced at the same time as MIN_SIZE_RECOVERY
+#define CEPH_FEATURE_OSD_PROXY_FEATURES (1ULL<<49) /* overlap w/ above */