mdsmap.h (1766B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _FS_CEPH_MDSMAP_H 3#define _FS_CEPH_MDSMAP_H 4 5#include <linux/bug.h> 6#include <linux/ceph/types.h> 7 8/* 9 * mds map - describe servers in the mds cluster. 10 * 11 * we limit fields to those the client actually xcares about 12 */ 13struct ceph_mds_info { 14 u64 global_id; 15 struct ceph_entity_addr addr; 16 s32 state; 17 int num_export_targets; 18 bool laggy; 19 u32 *export_targets; 20}; 21 22struct ceph_mdsmap { 23 u32 m_epoch, m_client_epoch, m_last_failure; 24 u32 m_root; 25 u32 m_session_timeout; /* seconds */ 26 u32 m_session_autoclose; /* seconds */ 27 u64 m_max_file_size; 28 u32 m_max_mds; /* expected up:active mds number */ 29 u32 m_num_active_mds; /* actual up:active mds number */ 30 u32 possible_max_rank; /* possible max rank index */ 31 struct ceph_mds_info *m_info; 32 33 /* which object pools file data can be stored in */ 34 int m_num_data_pg_pools; 35 u64 *m_data_pg_pools; 36 u64 m_cas_pg_pool; 37 38 bool m_enabled; 39 bool m_damaged; 40 int m_num_laggy; 41}; 42 43static inline struct ceph_entity_addr * 44ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w) 45{ 46 if (w >= m->possible_max_rank) 47 return NULL; 48 return &m->m_info[w].addr; 49} 50 51static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w) 52{ 53 BUG_ON(w < 0); 54 if (w >= m->possible_max_rank) 55 return CEPH_MDS_STATE_DNE; 56 return m->m_info[w].state; 57} 58 59static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w) 60{ 61 if (w >= 0 && w < m->possible_max_rank) 62 return m->m_info[w].laggy; 63 return false; 64} 65 66extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m); 67struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end, bool msgr2); 68extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m); 69extern bool ceph_mdsmap_is_cluster_available(struct ceph_mdsmap *m); 70 71#endif