1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _FS_CEPH_MON_CLIENT_H
3 #define _FS_CEPH_MON_CLIENT_H
5 #include <linux/completion.h>
6 #include <linux/kref.h>
7 #include <linux/rbtree.h>
9 #include <linux/ceph/messenger.h>
12 struct ceph_mount_args;
13 struct ceph_auth_client;
16 * The monitor map enumerates the set of all monitors.
19 struct ceph_fsid fsid;
22 struct ceph_entity_inst mon_inst[];
25 struct ceph_mon_client;
26 struct ceph_mon_generic_request;
30 * Generic mechanism for resending monitor requests.
32 typedef void (*ceph_monc_request_func_t)(struct ceph_mon_client *monc,
35 /* a pending monitor request */
36 struct ceph_mon_request {
37 struct ceph_mon_client *monc;
38 struct delayed_work delayed_work;
40 ceph_monc_request_func_t do_request;
43 typedef void (*ceph_monc_callback_t)(struct ceph_mon_generic_request *);
46 * ceph_mon_generic_request is being used for the statfs and
47 * mon_get_version requests which are being done a bit differently
48 * because we need to get data back to the caller
50 struct ceph_mon_generic_request {
51 struct ceph_mon_client *monc;
57 struct completion completion;
58 ceph_monc_callback_t complete_cb;
59 u64 private_data; /* r_tid/linger_id */
61 struct ceph_msg *request; /* original request */
62 struct ceph_msg *reply; /* and reply */
65 struct ceph_statfs *st;
70 struct ceph_mon_client {
71 struct ceph_client *client;
72 struct ceph_monmap *monmap;
75 struct delayed_work delayed_work;
77 struct ceph_auth_client *auth;
78 struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack;
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;
87 bool had_a_connection;
88 int hunt_mult; /* [1..CEPH_MONC_HUNT_MAX_MULT] */
90 /* pending generic requests */
91 struct rb_root generic_request_tree;
94 /* subs, indexed with CEPH_SUB_* */
96 struct ceph_mon_subscribe_item item;
100 int fs_cluster_id; /* "mdsmap.<id>" sub */
102 #ifdef CONFIG_DEBUG_FS
103 struct dentry *debugfs_file;
107 extern int ceph_monmap_contains(struct ceph_monmap *m,
108 struct ceph_entity_addr *addr);
110 extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);
111 extern void ceph_monc_stop(struct ceph_mon_client *monc);
112 extern void ceph_monc_reopen_session(struct ceph_mon_client *monc);
121 extern const char *ceph_sub_str[];
124 * The model here is to indicate that we need a new map of at least
125 * epoch @epoch, and also call in when we receive a map. We will
126 * periodically rerequest the map from the monitor cluster until we
129 bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch,
131 void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch);
132 void ceph_monc_renew_subs(struct ceph_mon_client *monc);
134 extern int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch,
135 unsigned long timeout);
137 int ceph_monc_do_statfs(struct ceph_mon_client *monc, u64 data_pool,
138 struct ceph_statfs *buf);
140 int ceph_monc_get_version(struct ceph_mon_client *monc, const char *what,
142 int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what,
143 ceph_monc_callback_t cb, u64 private_data);
145 int ceph_monc_blocklist_add(struct ceph_mon_client *monc,
146 struct ceph_entity_addr *client_addr);
148 extern int ceph_monc_open_session(struct ceph_mon_client *monc);
150 extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);