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 */
11 struct 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
20 struct 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
35 static inline struct ceph_entity_addr *
ceph_mdsmap_get_addr(struct ceph_mdsmap * m,int w)36 ceph_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
ceph_mdsmap_get_state(struct ceph_mdsmap * m,int w)43 static 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
ceph_mdsmap_is_laggy(struct ceph_mdsmap * m,int w)51 static 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
58 extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m);
59 extern struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end);
60 extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m);
61
62 #endif
63