[linux.git] / fs / ceph / mdsmap.h

/* 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>

struct ceph_mds_client;

/*
 * 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;
	u64 m_max_xattr_size;		/* maximum size for xattrs blob */
	u32 m_max_mds;			/* expected up:active mds number */
	u32 m_num_active_mds;		/* actual up:active mds number */
	u32 possible_max_rank;		/* possible max rank index */
	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->possible_max_rank)
		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->possible_max_rank)
		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->possible_max_rank)
		return m->m_info[w].laggy;
	return false;
}

extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m);
struct ceph_mdsmap *ceph_mdsmap_decode(struct ceph_mds_client *mdsc, void **p,
				       void *end, bool msgr2);
extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m);
extern bool ceph_mdsmap_is_cluster_available(struct ceph_mdsmap *m);

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
2f2dc053 SW	2	#ifndef _FS_CEPH_MDSMAP_H
	3	#define _FS_CEPH_MDSMAP_H
	4
187f1882	5	#include <linux/bug.h>
a1ce3928	6	#include <linux/ceph/types.h>
2f2dc053	7
197b7d79 XL	8	struct ceph_mds_client;
197b7d79 XL	9
2f2dc053 SW	10	/*
	11	* mds map - describe servers in the mds cluster.
	12	*
	13	* we limit fields to those the client actually xcares about
	14	*/
	15	struct ceph_mds_info {
94045e11	16	u64 global_id;
2f2dc053 SW	17	struct ceph_entity_addr addr;
	18	s32 state;
	19	int num_export_targets;
0deb01c9	20	bool laggy;
2f2dc053 SW	21	u32 *export_targets;
	22	};
	23
	24	struct ceph_mdsmap {
	25	u32 m_epoch, m_client_epoch, m_last_failure;
	26	u32 m_root;
	27	u32 m_session_timeout; /* seconds */
	28	u32 m_session_autoclose; /* seconds */
	29	u64 m_max_file_size;
d93231a6	30	u64 m_max_xattr_size; /* maximum size for xattrs blob */
4d7ace02	31	u32 m_max_mds; /* expected up:active mds number */
b38c9eb4 XL	32	u32 m_num_active_mds; /* actual up:active mds number */
b38c9eb4 XL	33	u32 possible_max_rank; /* possible max rank index */
2f2dc053 SW	34	struct ceph_mds_info *m_info;
	35
	36	/* which object pools file data can be stored in */
	37	int m_num_data_pg_pools;
4f6a7e5e SW	38	u64 *m_data_pg_pools;
4f6a7e5e SW	39	u64 m_cas_pg_pool;
e9e427f0 YZ	40
	41	bool m_enabled;
	42	bool m_damaged;
	43	int m_num_laggy;
2f2dc053 SW	44	};
	45
	46	static inline struct ceph_entity_addr *
	47	ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w)
	48	{
b38c9eb4	49	if (w >= m->possible_max_rank)
2f2dc053 SW	50	return NULL;
	51	return &m->m_info[w].addr;
	52	}
	53
	54	static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w)
	55	{
	56	BUG_ON(w < 0);
b38c9eb4	57	if (w >= m->possible_max_rank)
2f2dc053 SW	58	return CEPH_MDS_STATE_DNE;
	59	return m->m_info[w].state;
	60	}
	61
0deb01c9 SW	62	static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w)
0deb01c9 SW	63	{
b38c9eb4	64	if (w >= 0 && w < m->possible_max_rank)
0deb01c9 SW	65	return m->m_info[w].laggy;
	66	return false;
	67	}
	68
2f2dc053	69	extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m);
197b7d79 XL	70	struct ceph_mdsmap ceph_mdsmap_decode(struct ceph_mds_client mdsc, void **p,
197b7d79 XL	71	void *end, bool msgr2);
2f2dc053	72	extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m);
e9e427f0	73	extern bool ceph_mdsmap_is_cluster_available(struct ceph_mdsmap *m);
2f2dc053 SW	74
2f2dc053 SW	75	#endif