/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _FS_CEPH_MDSMAP_H
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#define _FS_CEPH_MDSMAP_H
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#include <linux/bug.h>
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#include <linux/ceph/types.h>
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/*
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* mds map - describe servers in the mds cluster.
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*
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* we limit fields to those the client actually xcares about
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*/
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struct ceph_mds_info {
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u64 global_id;
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struct ceph_entity_addr addr;
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s32 state;
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int num_export_targets;
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bool laggy;
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u32 *export_targets;
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};
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struct ceph_mdsmap {
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u32 m_epoch, m_client_epoch, m_last_failure;
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u32 m_root;
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u32 m_session_timeout; /* seconds */
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u32 m_session_autoclose; /* seconds */
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u64 m_max_file_size;
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u32 m_max_mds; /* expected up:active mds number */
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u32 m_num_active_mds; /* actual up:active mds number */
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u32 possible_max_rank; /* possible max rank index */
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struct ceph_mds_info *m_info;
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/* which object pools file data can be stored in */
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int m_num_data_pg_pools;
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u64 *m_data_pg_pools;
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u64 m_cas_pg_pool;
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bool m_enabled;
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bool m_damaged;
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int m_num_laggy;
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};
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static inline struct ceph_entity_addr *
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ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w)
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{
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if (w >= m->possible_max_rank)
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return NULL;
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return &m->m_info[w].addr;
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}
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static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w)
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{
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BUG_ON(w < 0);
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if (w >= m->possible_max_rank)
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return CEPH_MDS_STATE_DNE;
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return m->m_info[w].state;
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}
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static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w)
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{
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if (w >= 0 && w < m->possible_max_rank)
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return m->m_info[w].laggy;
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return false;
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}
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extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m);
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extern struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end);
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extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m);
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extern bool ceph_mdsmap_is_cluster_available(struct ceph_mdsmap *m);
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#endif
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