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

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

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

#include <linux/ceph/messenger.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_generic_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;
};

typedef void (*ceph_monc_callback_t)(struct ceph_mon_generic_request *);

/*
 * ceph_mon_generic_request is being used for the statfs and
 * mon_get_version requests which are being done a bit differently
 * because we need to get data back to the caller
 */
struct ceph_mon_generic_request {
	struct ceph_mon_client *monc;
	struct kref kref;
	u64 tid;
	struct rb_node node;
	int result;

	struct completion completion;
	ceph_monc_callback_t complete_cb;
	u64 private_data;          /* r_tid/linger_id */

	struct ceph_msg *request;  /* original request */
	struct ceph_msg *reply;    /* and reply */

	union {
		struct ceph_statfs *st;
		u64 newest;
	} u;
};

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, *m_auth_reply, *m_subscribe, *m_subscribe_ack;
	int pending_auth;

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

	bool had_a_connection;
	int hunt_mult; /* [1..CEPH_MONC_HUNT_MAX_MULT] */

	/* pending generic requests */
	struct rb_root generic_request_tree;
	u64 last_tid;

	/* subs, indexed with CEPH_SUB_* */
	struct {
		struct ceph_mon_subscribe_item item;
		bool want;
		u32 have; /* epoch */
	} subs[4];
	int fs_cluster_id; /* "mdsmap.<id>" sub */

#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);

enum {
	CEPH_SUB_MONMAP = 0,
	CEPH_SUB_OSDMAP,
	CEPH_SUB_FSMAP,
	CEPH_SUB_MDSMAP,
};

extern const char *ceph_sub_str[];

/*
 * The model here is to indicate that we need a new map of at least
 * epoch @epoch, 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.
 */
bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch,
			bool continuous);
void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch);
void ceph_monc_renew_subs(struct ceph_mon_client *monc);

extern int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch,
				 unsigned long timeout);

int ceph_monc_do_statfs(struct ceph_mon_client *monc, u64 data_pool,
			struct ceph_statfs *buf);

int ceph_monc_get_version(struct ceph_mon_client *monc, const char *what,
			  u64 *newest);
int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what,
				ceph_monc_callback_t cb, u64 private_data);

int ceph_monc_blacklist_add(struct ceph_mon_client *monc,
			    struct ceph_entity_addr *client_addr);

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
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
ba75bb98 SW	2	#ifndef _FS_CEPH_MON_CLIENT_H
	3	#define _FS_CEPH_MON_CLIENT_H
	4
	5	#include <linux/completion.h>
3143edd3	6	#include <linux/kref.h>
85ff03f6	7	#include <linux/rbtree.h>
ba75bb98	8
a1ce3928	9	#include <linux/ceph/messenger.h>
ba75bb98 SW	10
	11	struct ceph_client;
	12	struct ceph_mount_args;
4e7a5dcd	13	struct ceph_auth_client;
ba75bb98 SW	14
	15	/*
	16	* The monitor map enumerates the set of all monitors.
	17	*/
	18	struct ceph_monmap {
	19	struct ceph_fsid fsid;
	20	u32 epoch;
	21	u32 num_mon;
	22	struct ceph_entity_inst mon_inst[0];
	23	};
	24
	25	struct ceph_mon_client;
f8c76f6f	26	struct ceph_mon_generic_request;
ba75bb98 SW	27
	28
	29	/*
	30	* Generic mechanism for resending monitor requests.
	31	*/
	32	typedef void (ceph_monc_request_func_t)(struct ceph_mon_client monc,
	33	int newmon);
	34
	35	/* a pending monitor request */
	36	struct ceph_mon_request {
	37	struct ceph_mon_client *monc;
	38	struct delayed_work delayed_work;
	39	unsigned long delay;
	40	ceph_monc_request_func_t do_request;
	41	};
	42
d0b19705 ID	43	typedef void (ceph_monc_callback_t)(struct ceph_mon_generic_request );
d0b19705 ID	44
ba75bb98	45	/*
7a6fdeb2	46	* ceph_mon_generic_request is being used for the statfs and
513a8243 ID	47	* mon_get_version requests which are being done a bit differently
513a8243 ID	48	* because we need to get data back to the caller
ba75bb98	49	*/
f8c76f6f	50	struct ceph_mon_generic_request {
d0b19705	51	struct ceph_mon_client *monc;
3143edd3	52	struct kref kref;
ba75bb98	53	u64 tid;
85ff03f6	54	struct rb_node node;
ba75bb98	55	int result;
d0b19705	56
ba75bb98	57	struct completion completion;
d0b19705 ID	58	ceph_monc_callback_t complete_cb;
	59	u64 private_data; /* r_tid/linger_id */
	60
ba75bb98	61	struct ceph_msg request; / original request */
3143edd3	62	struct ceph_msg reply; / and reply */
d0b19705 ID	63
	64	union {
	65	struct ceph_statfs *st;
	66	u64 newest;
	67	} u;
ba75bb98 SW	68	};
	69
	70	struct ceph_mon_client {
	71	struct ceph_client *client;
	72	struct ceph_monmap *monmap;
	73
	74	struct mutex mutex;
	75	struct delayed_work delayed_work;
	76
4e7a5dcd	77	struct ceph_auth_client *auth;
240ed68e	78	struct ceph_msg m_auth, m_auth_reply, m_subscribe, m_subscribe_ack;
9bd2e6f8	79	int pending_auth;
4e7a5dcd	80
ba75bb98 SW	81	bool hunting;
ba75bb98 SW	82	int cur_mon; /* last monitor i contacted */
82dcabad ID	83	unsigned long sub_renew_after;
82dcabad ID	84	unsigned long sub_renew_sent;
67130934	85	struct ceph_connection con;
ba75bb98	86
168b9090 ID	87	bool had_a_connection;
	88	int hunt_mult; /* [1..CEPH_MONC_HUNT_MAX_MULT] */
	89
f8c76f6f YS	90	/* pending generic requests */
f8c76f6f YS	91	struct rb_root generic_request_tree;
ba75bb98 SW	92	u64 last_tid;
ba75bb98 SW	93
82dcabad ID	94	/* subs, indexed with CEPH_SUB_* */
	95	struct {
	96	struct ceph_mon_subscribe_item item;
	97	bool want;
	98	u32 have; /* epoch */
0cabbd94	99	} subs[4];
737cc81e	100	int fs_cluster_id; /* "mdsmap.<id>" sub */
ba75bb98	101
039934b8	102	#ifdef CONFIG_DEBUG_FS
ba75bb98	103	struct dentry *debugfs_file;
039934b8	104	#endif
ba75bb98 SW	105	};
	106
	107	extern struct ceph_monmap ceph_monmap_decode(void p, void *end);
	108	extern int ceph_monmap_contains(struct ceph_monmap *m,
	109	struct ceph_entity_addr *addr);
	110
	111	extern int ceph_monc_init(struct ceph_mon_client monc, struct ceph_client cl);
	112	extern void ceph_monc_stop(struct ceph_mon_client *monc);
	113
82dcabad	114	enum {
0cabbd94	115	CEPH_SUB_MONMAP = 0,
82dcabad	116	CEPH_SUB_OSDMAP,
0cabbd94 YZ	117	CEPH_SUB_FSMAP,
0cabbd94 YZ	118	CEPH_SUB_MDSMAP,
82dcabad ID	119	};
	120
	121	extern const char *ceph_sub_str[];
	122
ba75bb98 SW	123	/*
ba75bb98 SW	124	* The model here is to indicate that we need a new map of at least
82dcabad	125	* epoch @epoch, and also call in when we receive a map. We will
ba75bb98 SW	126	* periodically rerequest the map from the monitor cluster until we
	127	* get what we want.
	128	*/
82dcabad ID	129	bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch,
	130	bool continuous);
	131	void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch);
42c1b124	132	void ceph_monc_renew_subs(struct ceph_mon_client *monc);
ba75bb98	133
6044cde6 ID	134	extern int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch,
6044cde6 ID	135	unsigned long timeout);
ba75bb98	136
06d74376 DF	137	int ceph_monc_do_statfs(struct ceph_mon_client *monc, u64 data_pool,
06d74376 DF	138	struct ceph_statfs *buf);
ba75bb98	139
d0b19705 ID	140	int ceph_monc_get_version(struct ceph_mon_client monc, const char what,
	141	u64 *newest);
	142	int ceph_monc_get_version_async(struct ceph_mon_client monc, const char what,
	143	ceph_monc_callback_t cb, u64 private_data);
513a8243	144
6305a3b4 DF	145	int ceph_monc_blacklist_add(struct ceph_mon_client *monc,
	146	struct ceph_entity_addr *client_addr);
	147
4e7a5dcd SW	148	extern int ceph_monc_open_session(struct ceph_mon_client *monc);
4e7a5dcd SW	149
9bd2e6f8 SW	150	extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);
9bd2e6f8 SW	151
ba75bb98	152	#endif