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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _FS_CEPH_MON_CLIENT_H3#define _FS_CEPH_MON_CLIENT_H4 5#include <linux/completion.h>6#include <linux/kref.h>7#include <linux/rbtree.h>8 9#include <linux/ceph/messenger.h>10 11struct ceph_client;12struct ceph_mount_args;13struct ceph_auth_client;14 15/*16 * The monitor map enumerates the set of all monitors.17 */18struct ceph_monmap {19 struct ceph_fsid fsid;20 u32 epoch;21 u32 num_mon;22 struct ceph_entity_inst mon_inst[] __counted_by(num_mon);23};24 25struct ceph_mon_client;26struct ceph_mon_generic_request;27 28 29/*30 * Generic mechanism for resending monitor requests.31 */32typedef void (*ceph_monc_request_func_t)(struct ceph_mon_client *monc,33 int newmon);34 35/* a pending monitor request */36struct 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 43typedef void (*ceph_monc_callback_t)(struct ceph_mon_generic_request *);44 45/*46 * ceph_mon_generic_request is being used for the statfs and47 * mon_get_version requests which are being done a bit differently48 * because we need to get data back to the caller49 */50struct ceph_mon_generic_request {51 struct ceph_mon_client *monc;52 struct kref kref;53 u64 tid;54 struct rb_node node;55 int result;56 57 struct completion completion;58 ceph_monc_callback_t complete_cb;59 u64 private_data; /* r_tid/linger_id */60 61 struct ceph_msg *request; /* original request */62 struct ceph_msg *reply; /* and reply */63 64 union {65 struct ceph_statfs *st;66 u64 newest;67 } u;68};69 70struct 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 77 struct ceph_auth_client *auth;78 struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack;79 int pending_auth;80 81 bool hunting;82 int cur_mon; /* last monitor i contacted */83 unsigned long sub_renew_after;84 unsigned long sub_renew_sent;85 struct ceph_connection con;86 87 bool had_a_connection;88 int hunt_mult; /* [1..CEPH_MONC_HUNT_MAX_MULT] */89 90 /* pending generic requests */91 struct rb_root generic_request_tree;92 u64 last_tid;93 94 /* subs, indexed with CEPH_SUB_* */95 struct {96 struct ceph_mon_subscribe_item item;97 bool want;98 u32 have; /* epoch */99 } subs[4];100 int fs_cluster_id; /* "mdsmap.<id>" sub */101 102#ifdef CONFIG_DEBUG_FS103 struct dentry *debugfs_file;104#endif105};106 107extern int ceph_monmap_contains(struct ceph_monmap *m,108 struct ceph_entity_addr *addr);109 110extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);111extern void ceph_monc_stop(struct ceph_mon_client *monc);112extern void ceph_monc_reopen_session(struct ceph_mon_client *monc);113 114enum {115 CEPH_SUB_MONMAP = 0,116 CEPH_SUB_OSDMAP,117 CEPH_SUB_FSMAP,118 CEPH_SUB_MDSMAP,119};120 121extern const char *ceph_sub_str[];122 123/*124 * The model here is to indicate that we need a new map of at least125 * epoch @epoch, and also call in when we receive a map. We will126 * periodically rerequest the map from the monitor cluster until we127 * get what we want.128 */129bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch,130 bool continuous);131void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch);132void ceph_monc_renew_subs(struct ceph_mon_client *monc);133 134extern int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch,135 unsigned long timeout);136 137int ceph_monc_do_statfs(struct ceph_mon_client *monc, u64 data_pool,138 struct ceph_statfs *buf);139 140int ceph_monc_get_version(struct ceph_mon_client *monc, const char *what,141 u64 *newest);142int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what,143 ceph_monc_callback_t cb, u64 private_data);144 145int ceph_monc_blocklist_add(struct ceph_mon_client *monc,146 struct ceph_entity_addr *client_addr);147 148extern int ceph_monc_open_session(struct ceph_mon_client *monc);149 150extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);151 152#endif153