[linux-2.6-block.git] / fs / ceph / mon_client.h

#ifndef _FS_CEPH_MON_CLIENT_H
#define _FS_CEPH_MON_CLIENT_H

#include <linux/completion.h>
#include <linux/rbtree.h>

#include "messenger.h"
#include "msgpool.h"

struct ceph_client;
struct ceph_mount_args;
struct ceph_auth_client;

/*
 * The monitor map enumerates the set of all monitors.
 */
struct ceph_monmap {
	struct ceph_fsid fsid;
	u32 epoch;
	u32 num_mon;
	struct ceph_entity_inst mon_inst[0];
};

struct ceph_mon_client;
struct ceph_mon_statfs_request;


/*
 * Generic mechanism for resending monitor requests.
 */
typedef void (*ceph_monc_request_func_t)(struct ceph_mon_client *monc,
					 int newmon);

/* a pending monitor request */
struct ceph_mon_request {
	struct ceph_mon_client *monc;
	struct delayed_work delayed_work;
	unsigned long delay;
	ceph_monc_request_func_t do_request;
};

/*
 * statfs() is done a bit differently because we need to get data back
 * to the caller
 */
struct ceph_mon_statfs_request {
	u64 tid;
	struct rb_node node;
	int result;
	struct ceph_statfs *buf;
	struct completion completion;
	unsigned long last_attempt, delay; /* jiffies */
	struct ceph_msg *request;  /* original request */
};

struct ceph_mon_client {
	struct ceph_client *client;
	struct ceph_monmap *monmap;

	struct mutex mutex;
	struct delayed_work delayed_work;

	struct ceph_auth_client *auth;
	struct ceph_msg *m_auth;
	int pending_auth;

	bool hunting;
	int cur_mon;                       /* last monitor i contacted */
	unsigned long sub_sent, sub_renew_after;
	struct ceph_connection *con;
	bool have_fsid;

	/* msg pools */
	struct ceph_msgpool msgpool_subscribe_ack;
	struct ceph_msgpool msgpool_statfs_reply;
	struct ceph_msgpool msgpool_auth_reply;

	/* pending statfs requests */
	struct rb_root statfs_request_tree;
	int num_statfs_requests;
	u64 last_tid;

	/* mds/osd map */
	int want_next_osdmap; /* 1 = want, 2 = want+asked */
	u32 have_osdmap, have_mdsmap;

#ifdef CONFIG_DEBUG_FS
	struct dentry *debugfs_file;
#endif
};

extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end);
extern int ceph_monmap_contains(struct ceph_monmap *m,
				struct ceph_entity_addr *addr);

extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);
extern void ceph_monc_stop(struct ceph_mon_client *monc);

/*
 * The model here is to indicate that we need a new map of at least
 * epoch @want, and also call in when we receive a map.  We will
 * periodically rerequest the map from the monitor cluster until we
 * get what we want.
 */
extern int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 have);
extern int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 have);

extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc);

extern int ceph_monc_do_statfs(struct ceph_mon_client *monc,
			       struct ceph_statfs *buf);

extern int ceph_monc_open_session(struct ceph_mon_client *monc);

extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);


#endif
Commit	Line	Data
	1	#ifndef _FS_CEPH_MON_CLIENT_H
	2	#define _FS_CEPH_MON_CLIENT_H
	3
	4	#include <linux/completion.h>
	5	#include <linux/rbtree.h>
	6
	7	#include "messenger.h"
	8	#include "msgpool.h"
	9
	10	struct ceph_client;
	11	struct ceph_mount_args;
	12	struct ceph_auth_client;
	13
	14	/*
	15	* The monitor map enumerates the set of all monitors.
	16	*/
	17	struct ceph_monmap {
	18	struct ceph_fsid fsid;
	19	u32 epoch;
	20	u32 num_mon;
	21	struct ceph_entity_inst mon_inst[0];
	22	};
	23
	24	struct ceph_mon_client;
	25	struct ceph_mon_statfs_request;
	26
	27
	28	/*
	29	* Generic mechanism for resending monitor requests.
	30	*/
	31	typedef void (ceph_monc_request_func_t)(struct ceph_mon_client monc,
	32	int newmon);
	33
	34	/* a pending monitor request */
	35	struct ceph_mon_request {
	36	struct ceph_mon_client *monc;
	37	struct delayed_work delayed_work;
	38	unsigned long delay;
	39	ceph_monc_request_func_t do_request;
	40	};
	41
	42	/*
	43	* statfs() is done a bit differently because we need to get data back
	44	* to the caller
	45	*/
	46	struct ceph_mon_statfs_request {
	47	u64 tid;
	48	struct rb_node node;
	49	int result;
	50	struct ceph_statfs *buf;
	51	struct completion completion;
	52	unsigned long last_attempt, delay; /* jiffies */
	53	struct ceph_msg request; / original request */
	54	};
	55
	56	struct ceph_mon_client {
	57	struct ceph_client *client;
	58	struct ceph_monmap *monmap;
	59
	60	struct mutex mutex;
	61	struct delayed_work delayed_work;
	62
	63	struct ceph_auth_client *auth;
	64	struct ceph_msg *m_auth;
	65	int pending_auth;
	66
	67	bool hunting;
	68	int cur_mon; /* last monitor i contacted */
	69	unsigned long sub_sent, sub_renew_after;
	70	struct ceph_connection *con;
	71	bool have_fsid;
	72
	73	/* msg pools */
	74	struct ceph_msgpool msgpool_subscribe_ack;
	75	struct ceph_msgpool msgpool_statfs_reply;
	76	struct ceph_msgpool msgpool_auth_reply;
	77
	78	/* pending statfs requests */
	79	struct rb_root statfs_request_tree;
	80	int num_statfs_requests;
	81	u64 last_tid;
	82
	83	/* mds/osd map */
	84	int want_next_osdmap; /* 1 = want, 2 = want+asked */
	85	u32 have_osdmap, have_mdsmap;
	86
	87	#ifdef CONFIG_DEBUG_FS
	88	struct dentry *debugfs_file;
	89	#endif
	90	};
	91
	92	extern struct ceph_monmap ceph_monmap_decode(void p, void *end);
	93	extern int ceph_monmap_contains(struct ceph_monmap *m,
	94	struct ceph_entity_addr *addr);
	95
	96	extern int ceph_monc_init(struct ceph_mon_client monc, struct ceph_client cl);
	97	extern void ceph_monc_stop(struct ceph_mon_client *monc);
	98
	99	/*
	100	* The model here is to indicate that we need a new map of at least
	101	* epoch @want, and also call in when we receive a map. We will
	102	* periodically rerequest the map from the monitor cluster until we
	103	* get what we want.
	104	*/
	105	extern int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 have);
	106	extern int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 have);
	107
	108	extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc);
	109
	110	extern int ceph_monc_do_statfs(struct ceph_mon_client *monc,
	111	struct ceph_statfs *buf);
	112
	113	extern int ceph_monc_open_session(struct ceph_mon_client *monc);
	114
	115	extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);
	116
	117
	118
	119	#endif