[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / ceph / mdsmap.h

#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 */
	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;
};

static inline struct ceph_entity_addr *
ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w)
{
	if (w >= m->m_max_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_max_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_max_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);

#endif
Commit	Line	Data
2f2dc053 SW	1	#ifndef _FS_CEPH_MDSMAP_H
	2	#define _FS_CEPH_MDSMAP_H
	3
187f1882	4	#include <linux/bug.h>
a1ce3928	5	#include <linux/ceph/types.h>
2f2dc053 SW	6
	7	/*
	8	* mds map - describe servers in the mds cluster.
	9	*
	10	* we limit fields to those the client actually xcares about
	11	*/
	12	struct ceph_mds_info {
94045e11	13	u64 global_id;
2f2dc053 SW	14	struct ceph_entity_addr addr;
	15	s32 state;
	16	int num_export_targets;
0deb01c9	17	bool laggy;
2f2dc053 SW	18	u32 *export_targets;
	19	};
	20
	21	struct 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	struct ceph_mds_info *m_info;
	29
	30	/* which object pools file data can be stored in */
	31	int m_num_data_pg_pools;
4f6a7e5e SW	32	u64 *m_data_pg_pools;
4f6a7e5e SW	33	u64 m_cas_pg_pool;
2f2dc053 SW	34	};
	35
	36	static inline struct ceph_entity_addr *
	37	ceph_mdsmap_get_addr(struct ceph_mdsmap *m, int w)
	38	{
	39	if (w >= m->m_max_mds)
	40	return NULL;
	41	return &m->m_info[w].addr;
	42	}
	43
	44	static inline int ceph_mdsmap_get_state(struct ceph_mdsmap *m, int w)
	45	{
	46	BUG_ON(w < 0);
	47	if (w >= m->m_max_mds)
	48	return CEPH_MDS_STATE_DNE;
	49	return m->m_info[w].state;
	50	}
	51
0deb01c9 SW	52	static inline bool ceph_mdsmap_is_laggy(struct ceph_mdsmap *m, int w)
	53	{
	54	if (w >= 0 && w < m->m_max_mds)
	55	return m->m_info[w].laggy;
	56	return false;
	57	}
	58
2f2dc053 SW	59	extern int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m);
	60	extern struct ceph_mdsmap ceph_mdsmap_decode(void p, void end);
	61	extern void ceph_mdsmap_destroy(struct ceph_mdsmap *m);
	62
	63	#endif