1#ifndef _FS_CEPH_MDSMAP_H 2#define _FS_CEPH_MDSMAP_H 3 4#include "types.h" 5 6/* 7 * mds map - describe servers in the mds cluster. 8 * 9 * we limit fields to those the client actually xcares about 10 */ 11struct ceph_mds_info { 12 u64 global_id; 13 struct ceph_entity_addr addr; 14 s32 state; 15 int num_export_targets; 16 bool laggy; 17 u32 *export_targets; 18}; 19 20struct ceph_mdsmap { 21 u32 m_epoch, m_client_epoch, m_last_failure; 22 u32 m_root; 23 u32 m_session_timeout; /* seconds */ 24 u32 m_session_autoclose; /* seconds */ 25 u64 m_max_file_size; 26 u32 m_max_mds; /* size of m_addr, m_state arrays */ 27 struct ceph_mds_info *m_info; 28 29 /* which object pools file data can be stored in */ 30 int m_num_data_pg_pools; 31 u32 *m_data_pg_pools; 32 u32 m_cas_pg_pool; 33}; 34 35static inline struct ceph_entity_addr * 36ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w) 37{ 38 if (w >= m->m_max_mds) 39 return NULL; 40 return &m->m_info[w].addr; 41} 42 43static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w) 44{ 45 BUG_ON(w < 0); 46 if (w >= m->m_max_mds) 47 return CEPH_MDS_STATE_DNE; 48 return m->m_info[w].state; 49} 50 51static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w) 52{ 53 if (w >= 0 && w < m->m_max_mds) 54 return m->m_info[w].laggy; 55 return false; 56} 57 58extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m); 59extern struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end); 60extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m); 61 62#endif 63