#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;}; /* * ceph_mon_generic_request is being used for the statfs and poolop requests * which are bening done a bit differently because we need to get data back * to the caller */struct ceph_mon_generic_request {	struct kref kref;	u64 tid;	struct rb_node node;	int result;	void *buf;	int buf_len;	struct completion completion;	struct ceph_msg *request;  /* original request */	struct ceph_msg *reply;    /* and reply */}; 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_sent, sub_renew_after;	struct ceph_connection con; 	/* pending generic requests */	struct rb_root generic_request_tree;	int num_generic_requests;	u64 last_tid; 	/* mds/osd map */	int want_mdsmap;	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); extern int ceph_monc_create_snapid(struct ceph_mon_client *monc,				   u32 pool, u64 *snapid); extern int ceph_monc_delete_snapid(struct ceph_mon_client *monc,				   u32 pool, u64 snapid); #endif