Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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 int m_num_mds;
29 struct ceph_mds_info *m_info;
30
31 /* which object pools file data can be stored in */
32 int m_num_data_pg_pools;
33 u64 *m_data_pg_pools;
34 u64 m_cas_pg_pool;
35
36 bool m_enabled;
37 bool m_damaged;
38 int m_num_laggy;
39};
40
41static inline struct ceph_entity_addr *
42ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w)
43{
44 if (w >= m->m_num_mds)
45 return NULL;
46 return &m->m_info[w].addr;
47}
48
49static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w)
50{
51 BUG_ON(w < 0);
52 if (w >= m->m_num_mds)
53 return CEPH_MDS_STATE_DNE;
54 return m->m_info[w].state;
55}
56
57static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w)
58{
59 if (w >= 0 && w < m->m_num_mds)
60 return m->m_info[w].laggy;
61 return false;
62}
63
64extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m);
65extern struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end);
66extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m);
67extern bool ceph_mdsmap_is_cluster_available(struct ceph_mdsmap *m);
68
69#endif