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ceph: drop unnecessary msgpool for mon_client subscribe_ack
[net-next-2.6.git] / fs / ceph / mon_client.h
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1#ifndef _FS_CEPH_MON_CLIENT_H
2#define _FS_CEPH_MON_CLIENT_H
3
4#include <linux/completion.h>
3143edd3 5#include <linux/kref.h>
85ff03f6 6#include <linux/rbtree.h>
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7
8#include "messenger.h"
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9
10struct ceph_client;
11struct ceph_mount_args;
4e7a5dcd 12struct ceph_auth_client;
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13
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;
25struct ceph_mon_statfs_request;
26
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/*
43 * statfs() is done a bit differently because we need to get data back
44 * to the caller
45 */
46struct ceph_mon_statfs_request {
3143edd3 47 struct kref kref;
ba75bb98 48 u64 tid;
85ff03f6 49 struct rb_node node;
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50 int result;
51 struct ceph_statfs *buf;
52 struct completion completion;
ba75bb98 53 struct ceph_msg *request; /* original request */
3143edd3 54 struct ceph_msg *reply; /* and reply */
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55};
56
57struct ceph_mon_client {
58 struct ceph_client *client;
59 struct ceph_monmap *monmap;
60
61 struct mutex mutex;
62 struct delayed_work delayed_work;
63
4e7a5dcd 64 struct ceph_auth_client *auth;
7c315c55 65 struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe_ack;
9bd2e6f8 66 int pending_auth;
4e7a5dcd 67
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68 bool hunting;
69 int cur_mon; /* last monitor i contacted */
70 unsigned long sub_sent, sub_renew_after;
71 struct ceph_connection *con;
4e7a5dcd 72 bool have_fsid;
ba75bb98 73
ba75bb98 74 /* pending statfs requests */
85ff03f6 75 struct rb_root statfs_request_tree;
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76 int num_statfs_requests;
77 u64 last_tid;
78
4e7a5dcd 79 /* mds/osd map */
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80 int want_next_osdmap; /* 1 = want, 2 = want+asked */
81 u32 have_osdmap, have_mdsmap;
82
039934b8 83#ifdef CONFIG_DEBUG_FS
ba75bb98 84 struct dentry *debugfs_file;
039934b8 85#endif
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86};
87
88extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end);
89extern int ceph_monmap_contains(struct ceph_monmap *m,
90 struct ceph_entity_addr *addr);
91
92extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);
93extern void ceph_monc_stop(struct ceph_mon_client *monc);
94
95/*
96 * The model here is to indicate that we need a new map of at least
97 * epoch @want, and also call in when we receive a map. We will
98 * periodically rerequest the map from the monitor cluster until we
99 * get what we want.
100 */
101extern int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 have);
102extern int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 have);
103
104extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc);
105
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106extern int ceph_monc_do_statfs(struct ceph_mon_client *monc,
107 struct ceph_statfs *buf);
108
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109extern int ceph_monc_open_session(struct ceph_mon_client *monc);
110
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111extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);
112
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113
114
115#endif