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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;
Sage Weilba75bb92009-10-06 11:31:11 -070053 struct completion completion;
Sage Weilba75bb92009-10-06 11:31:11 -070054 struct ceph_msg *request; /* original request */
Sage Weil3143edd2010-03-24 21:43:33 -070055 struct ceph_msg *reply; /* and reply */
Sage Weilba75bb92009-10-06 11:31:11 -070056};
57
58struct ceph_mon_client {
59 struct ceph_client *client;
60 struct ceph_monmap *monmap;
61
62 struct mutex mutex;
63 struct delayed_work delayed_work;
64
Sage Weil4e7a5dc2009-11-18 16:19:57 -080065 struct ceph_auth_client *auth;
Sage Weil240ed682010-05-21 14:57:25 -070066 struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack;
Sage Weil9bd2e6f2010-02-02 16:21:06 -080067 int pending_auth;
Sage Weil4e7a5dc2009-11-18 16:19:57 -080068
Sage Weilba75bb92009-10-06 11:31:11 -070069 bool hunting;
70 int cur_mon; /* last monitor i contacted */
71 unsigned long sub_sent, sub_renew_after;
72 struct ceph_connection *con;
Sage Weil4e7a5dc2009-11-18 16:19:57 -080073 bool have_fsid;
Sage Weilba75bb92009-10-06 11:31:11 -070074
Yehuda Sadehf8c76f62010-04-22 15:40:37 -070075 /* pending generic requests */
76 struct rb_root generic_request_tree;
77 int num_generic_requests;
Sage Weilba75bb92009-10-06 11:31:11 -070078 u64 last_tid;
79
Sage Weil4e7a5dc2009-11-18 16:19:57 -080080 /* mds/osd map */
Sage Weilba75bb92009-10-06 11:31:11 -070081 int want_next_osdmap; /* 1 = want, 2 = want+asked */
82 u32 have_osdmap, have_mdsmap;
83
Sage Weil039934b2009-11-12 15:05:52 -080084#ifdef CONFIG_DEBUG_FS
Sage Weilba75bb92009-10-06 11:31:11 -070085 struct dentry *debugfs_file;
Sage Weil039934b2009-11-12 15:05:52 -080086#endif
Sage Weilba75bb92009-10-06 11:31:11 -070087};
88
89extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end);
90extern int ceph_monmap_contains(struct ceph_monmap *m,
91 struct ceph_entity_addr *addr);
92
93extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);
94extern void ceph_monc_stop(struct ceph_mon_client *monc);
95
96/*
97 * The model here is to indicate that we need a new map of at least
98 * epoch @want, and also call in when we receive a map. We will
99 * periodically rerequest the map from the monitor cluster until we
100 * get what we want.
101 */
102extern int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 have);
103extern int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 have);
104
105extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc);
106
Sage Weilba75bb92009-10-06 11:31:11 -0700107extern int ceph_monc_do_statfs(struct ceph_mon_client *monc,
108 struct ceph_statfs *buf);
109
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800110extern int ceph_monc_open_session(struct ceph_mon_client *monc);
111
Sage Weil9bd2e6f2010-02-02 16:21:06 -0800112extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);
113
Sage Weilba75bb92009-10-06 11:31:11 -0700114
115
116#endif