1 #ifndef _FS_CEPH_MDSMAP_H
2 #define _FS_CEPH_MDSMAP_H
5 #include <linux/ceph/types.h>
8 * mds map - describe servers in the mds cluster.
10 * we limit fields to those the client actually xcares about
12 struct ceph_mds_info {
14 struct ceph_entity_addr addr;
16 int num_export_targets;
22 u32 m_epoch, m_client_epoch, m_last_failure;
24 u32 m_session_timeout; /* seconds */
25 u32 m_session_autoclose; /* seconds */
27 u32 m_max_mds; /* size of m_addr, m_state arrays */
28 struct ceph_mds_info *m_info;
30 /* which object pools file data can be stored in */
31 int m_num_data_pg_pools;
36 static inline struct ceph_entity_addr *
37 ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w)
39 if (w >= m->m_max_mds)
41 return &m->m_info[w].addr;
44 static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w)
47 if (w >= m->m_max_mds)
48 return CEPH_MDS_STATE_DNE;
49 return m->m_info[w].state;
52 static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w)
54 if (w >= 0 && w < m->m_max_mds)
55 return m->m_info[w].laggy;
59 extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m);
60 extern struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end);
61 extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m);