ceph: check availability of mds cluster on mount

Signed-off-by: Yan, Zheng <zyan@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/ceph/mdsmap.h b/include/linux/ceph/mdsmap.h
index 87ed09f54800..8ed5dc505fbb 100644
--- a/include/linux/ceph/mdsmap.h
+++ b/include/linux/ceph/mdsmap.h
@@ -31,6 +31,10 @@ struct ceph_mdsmap {
         int m_num_data_pg_pools;
         u64 *m_data_pg_pools;
         u64 m_cas_pg_pool;
+
+        bool m_enabled;
+        bool m_damaged;
+        int m_num_laggy;
 };
 
 static inline struct ceph_entity_addr *
@@ -59,5 +63,6 @@ static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w)
 extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m);
 extern struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end);
 extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m);
+extern bool ceph_mdsmap_is_cluster_available(struct ceph_mdsmap *m);
 
 #endif