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