[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;
	/*
	 * maximum size for xattrs blob.
	 * Zeroed by default to force the usage of the (sync) SETXATTR Op.
	 */
	u64 m_max_xattr_size;
	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;
51d31149 XL	30	/*
	31	* maximum size for xattrs blob.
	32	* Zeroed by default to force the usage of the (sync) SETXATTR Op.
	33	*/
	34	u64 m_max_xattr_size;
4d7ace02	35	u32 m_max_mds; /* expected up:active mds number */
b38c9eb4 XL	36	u32 m_num_active_mds; /* actual up:active mds number */
b38c9eb4 XL	37	u32 possible_max_rank; /* possible max rank index */
2f2dc053 SW	38	struct ceph_mds_info *m_info;
	39
	40	/* which object pools file data can be stored in */
	41	int m_num_data_pg_pools;
4f6a7e5e SW	42	u64 *m_data_pg_pools;
4f6a7e5e SW	43	u64 m_cas_pg_pool;
e9e427f0 YZ	44
	45	bool m_enabled;
	46	bool m_damaged;
	47	int m_num_laggy;
2f2dc053 SW	48	};
	49
	50	static inline struct ceph_entity_addr *
	51	ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w)
	52	{
b38c9eb4	53	if (w >= m->possible_max_rank)
2f2dc053 SW	54	return NULL;
	55	return &m->m_info[w].addr;
	56	}
	57
	58	static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w)
	59	{
	60	BUG_ON(w < 0);
b38c9eb4	61	if (w >= m->possible_max_rank)
2f2dc053 SW	62	return CEPH_MDS_STATE_DNE;
	63	return m->m_info[w].state;
	64	}
	65
0deb01c9 SW	66	static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w)
0deb01c9 SW	67	{
b38c9eb4	68	if (w >= 0 && w < m->possible_max_rank)
0deb01c9 SW	69	return m->m_info[w].laggy;
	70	return false;
	71	}
	72
2f2dc053	73	extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m);
197b7d79 XL	74	struct ceph_mdsmap ceph_mdsmap_decode(struct ceph_mds_client mdsc, void **p,
197b7d79 XL	75	void *end, bool msgr2);
2f2dc053	76	extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m);
e9e427f0	77	extern bool ceph_mdsmap_is_cluster_available(struct ceph_mdsmap *m);
2f2dc053 SW	78
2f2dc053 SW	79	#endif