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/* 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[] __counted_by(num_mon);
};
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 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);
extern void ceph_monc_reopen_session(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_blocklist_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
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