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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _FS_CEPH_MDSMAP_H
#define _FS_CEPH_MDSMAP_H

#include <linux/bug.h>
#include <linux/ceph/types.h>

/*
 * mds map - describe servers in the mds cluster.
 *
 * we limit fields to those the client actually xcares about
 */
struct ceph_mds_info {
	u64 global_id;
	struct ceph_entity_addr addr;
	s32 state;
	int num_export_targets;
	bool laggy;
	u32 *export_targets;
};

struct ceph_mdsmap {
	u32 m_epoch, m_client_epoch, m_last_failure;
	u32 m_root;
	u32 m_session_timeout;          /* seconds */
	u32 m_session_autoclose;        /* seconds */
	u64 m_max_file_size;
	u32 m_max_mds;                  /* size of m_addr, m_state arrays */
	int m_num_mds;
	struct ceph_mds_info *m_info;

	/* which object pools file data can be stored in */
	int m_num_data_pg_pools;
	u64 *m_data_pg_pools;
	u64 m_cas_pg_pool;

	bool m_enabled;
	bool m_damaged;
	int m_num_laggy;
};

static inline struct ceph_entity_addr *
ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w)
{
	if (w >= m->m_num_mds)
		return NULL;
	return &m->m_info[w].addr;
}

static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w)
{
	BUG_ON(w < 0);
	if (w >= m->m_num_mds)
		return CEPH_MDS_STATE_DNE;
	return m->m_info[w].state;
}

static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w)
{
	if (w >= 0 && w < m->m_num_mds)
		return m->m_info[w].laggy;
	return false;
}

extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m);
extern struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end);
extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m);
extern bool ceph_mdsmap_is_cluster_available(struct ceph_mdsmap *m);

#endif

Filemanager

Name Type Size Permission Actions
auth.h File 4.85 KB 0644
buffer.h File 833 B 0644
ceph_debug.h File 907 B 0644
ceph_features.h File 8.53 KB 0644
ceph_frag.h File 1.97 KB 0644
ceph_fs.h File 25.36 KB 0644
ceph_hash.h File 472 B 0644
cls_lock_client.h File 1.59 KB 0644
debugfs.h File 769 B 0644
decode.h File 9.06 KB 0644
libceph.h File 9.48 KB 0644
mdsmap.h File 1.62 KB 0644
messenger.h File 9.04 KB 0644
mon_client.h File 3.82 KB 0644
msgpool.h File 775 B 0644
msgr.h File 5.65 KB 0644
osd_client.h File 14.35 KB 0644
osdmap.h File 8.34 KB 0644
pagelist.h File 2.11 KB 0644
rados.h File 16.94 KB 0644
string_table.h File 1.3 KB 0644
types.h File 547 B 0644