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 struct ceph_mds_client; 9 10 /* 11 * mds map - describe servers in the mds cluster. 12 * 13 * we limit fields to those the client actually xcares about 14 */ 15 struct ceph_mds_info { 16 u64 global_id; 17 struct ceph_entity_addr addr; 18 s32 state; 19 int num_export_targets; 20 bool laggy; 21 u32 *export_targets; 22 }; 23 24 struct ceph_mdsmap { 25 u32 m_epoch, m_client_epoch, m_last_failure; 26 u32 m_root; 27 u32 m_session_timeout; /* seconds */ 28 u32 m_session_autoclose; /* seconds */ 29 u64 m_max_file_size; 30 /* 31 * maximum size for xattrs blob. 32 * Zeroed by default to force the usage of the (sync) SETXATTR Op. 33 */ 34 u64 m_max_xattr_size; 35 u32 m_max_mds; /* expected up:active mds number */ 36 u32 m_num_active_mds; /* actual up:active mds number */ 37 u32 possible_max_rank; /* possible max rank index */ 38 struct ceph_mds_info *m_info; 39 40 /* which object pools file data can be stored in */ 41 int m_num_data_pg_pools; 42 u64 *m_data_pg_pools; 43 u64 m_cas_pg_pool; 44 45 bool m_enabled; 46 bool m_damaged; 47 int m_num_laggy; 48 }; 49 50 static inline struct ceph_entity_addr * 51 ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w) 52 { 53 if (w >= m->possible_max_rank) 54 return NULL; 55 return &m->m_info[w].addr; 56 } 57 58 static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w) 59 { 60 BUG_ON(w < 0); 61 if (w >= m->possible_max_rank) 62 return CEPH_MDS_STATE_DNE; 63 return m->m_info[w].state; 64 } 65 66 static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w) 67 { 68 if (w >= 0 && w < m->possible_max_rank) 69 return m->m_info[w].laggy; 70 return false; 71 } 72 73 extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m); 74 struct ceph_mdsmap *ceph_mdsmap_decode(struct ceph_mds_client *mdsc, void **p, 75 void *end, bool msgr2); 76 extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m); 77 extern bool ceph_mdsmap_is_cluster_available(struct ceph_mdsmap *m); 78 79 #endif 80