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Sage Weilba75bb92009-10-06 11:31:11 -07001#ifndef _FS_CEPH_MON_CLIENT_H
2#define _FS_CEPH_MON_CLIENT_H
3
4#include <linux/completion.h>
Sage Weil3143edd2010-03-24 21:43:33 -07005#include <linux/kref.h>
Sage Weil85ff03f2010-02-15 14:47:28 -08006#include <linux/rbtree.h>
Sage Weilba75bb92009-10-06 11:31:11 -07007
8#include "messenger.h"
Sage Weilba75bb92009-10-06 11:31:11 -07009
10struct ceph_client;
11struct ceph_mount_args;
Sage Weil4e7a5dc2009-11-18 16:19:57 -080012struct ceph_auth_client;
Sage Weilba75bb92009-10-06 11:31:11 -070013
14/*
15 * The monitor map enumerates the set of all monitors.
16 */
17struct ceph_monmap {
18 struct ceph_fsid fsid;
19 u32 epoch;
20 u32 num_mon;
21 struct ceph_entity_inst mon_inst[0];
22};
23
24struct ceph_mon_client;
Yehuda Sadehf8c76f62010-04-22 15:40:37 -070025struct ceph_mon_generic_request;
Sage Weilba75bb92009-10-06 11:31:11 -070026
27
28/*
29 * Generic mechanism for resending monitor requests.
30 */
31typedef void (*ceph_monc_request_func_t)(struct ceph_mon_client *monc,
32 int newmon);
33
34/* a pending monitor request */
35struct ceph_mon_request {
36 struct ceph_mon_client *monc;
37 struct delayed_work delayed_work;
38 unsigned long delay;
39 ceph_monc_request_func_t do_request;
40};
41
42/*
Yehuda Sadehf8c76f62010-04-22 15:40:37 -070043 * ceph_mon_generic_request is being used for the statfs and poolop requests
44 * which are bening done a bit differently because we need to get data back
Sage Weilba75bb92009-10-06 11:31:11 -070045 * to the caller
46 */
Yehuda Sadehf8c76f62010-04-22 15:40:37 -070047struct ceph_mon_generic_request {
Sage Weil3143edd2010-03-24 21:43:33 -070048 struct kref kref;
Sage Weilba75bb92009-10-06 11:31:11 -070049 u64 tid;
Sage Weil85ff03f2010-02-15 14:47:28 -080050 struct rb_node node;
Sage Weilba75bb92009-10-06 11:31:11 -070051 int result;
Yehuda Sadehf8c76f62010-04-22 15:40:37 -070052 void *buf;
Yehuda Sadehe56fa102010-05-17 12:40:28 -070053 int buf_len;
Sage Weilba75bb92009-10-06 11:31:11 -070054 struct completion completion;
Sage Weilba75bb92009-10-06 11:31:11 -070055 struct ceph_msg *request; /* original request */
Sage Weil3143edd2010-03-24 21:43:33 -070056 struct ceph_msg *reply; /* and reply */
Sage Weilba75bb92009-10-06 11:31:11 -070057};
58
59struct ceph_mon_client {
60 struct ceph_client *client;
61 struct ceph_monmap *monmap;
62
63 struct mutex mutex;
64 struct delayed_work delayed_work;
65
Sage Weil4e7a5dc2009-11-18 16:19:57 -080066 struct ceph_auth_client *auth;
Sage Weil240ed682010-05-21 14:57:25 -070067 struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack;
Sage Weil9bd2e6f2010-02-02 16:21:06 -080068 int pending_auth;
Sage Weil4e7a5dc2009-11-18 16:19:57 -080069
Sage Weilba75bb92009-10-06 11:31:11 -070070 bool hunting;
71 int cur_mon; /* last monitor i contacted */
72 unsigned long sub_sent, sub_renew_after;
73 struct ceph_connection *con;
Sage Weil4e7a5dc2009-11-18 16:19:57 -080074 bool have_fsid;
Sage Weilba75bb92009-10-06 11:31:11 -070075
Yehuda Sadehf8c76f62010-04-22 15:40:37 -070076 /* pending generic requests */
77 struct rb_root generic_request_tree;
78 int num_generic_requests;
Sage Weilba75bb92009-10-06 11:31:11 -070079 u64 last_tid;
80
Sage Weil4e7a5dc2009-11-18 16:19:57 -080081 /* mds/osd map */
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070082 int want_mdsmap;
Sage Weilba75bb92009-10-06 11:31:11 -070083 int want_next_osdmap; /* 1 = want, 2 = want+asked */
84 u32 have_osdmap, have_mdsmap;
85
Sage Weil039934b2009-11-12 15:05:52 -080086#ifdef CONFIG_DEBUG_FS
Sage Weilba75bb92009-10-06 11:31:11 -070087 struct dentry *debugfs_file;
Sage Weil039934b2009-11-12 15:05:52 -080088#endif
Sage Weilba75bb92009-10-06 11:31:11 -070089};
90
91extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end);
92extern int ceph_monmap_contains(struct ceph_monmap *m,
93 struct ceph_entity_addr *addr);
94
95extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);
96extern void ceph_monc_stop(struct ceph_mon_client *monc);
97
98/*
99 * The model here is to indicate that we need a new map of at least
100 * epoch @want, and also call in when we receive a map. We will
101 * periodically rerequest the map from the monitor cluster until we
102 * get what we want.
103 */
104extern int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 have);
105extern int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 have);
106
107extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc);
108
Sage Weilba75bb92009-10-06 11:31:11 -0700109extern int ceph_monc_do_statfs(struct ceph_mon_client *monc,
110 struct ceph_statfs *buf);
111
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800112extern int ceph_monc_open_session(struct ceph_mon_client *monc);
113
Sage Weil9bd2e6f2010-02-02 16:21:06 -0800114extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);
115
Yehuda Sadehe56fa102010-05-17 12:40:28 -0700116extern int ceph_monc_create_snapid(struct ceph_mon_client *monc,
117 u32 pool, u64 *snapid);
Sage Weilba75bb92009-10-06 11:31:11 -0700118
Yehuda Sadehe56fa102010-05-17 12:40:28 -0700119extern int ceph_monc_delete_snapid(struct ceph_mon_client *monc,
120 u32 pool, u64 snapid);
Sage Weilba75bb92009-10-06 11:31:11 -0700121
122#endif