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ba75bb98 SW |
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> |
ba75bb98 | 7 | |
a1ce3928 | 8 | #include <linux/ceph/messenger.h> |
ba75bb98 SW |
9 | |
10 | struct ceph_client; | |
11 | struct ceph_mount_args; | |
4e7a5dcd | 12 | struct ceph_auth_client; |
ba75bb98 SW |
13 | |
14 | /* | |
15 | * The monitor map enumerates the set of all monitors. | |
16 | */ | |
17 | struct ceph_monmap { | |
18 | struct ceph_fsid fsid; | |
19 | u32 epoch; | |
20 | u32 num_mon; | |
21 | struct ceph_entity_inst mon_inst[0]; | |
22 | }; | |
23 | ||
24 | struct ceph_mon_client; | |
f8c76f6f | 25 | struct ceph_mon_generic_request; |
ba75bb98 SW |
26 | |
27 | ||
28 | /* | |
29 | * Generic mechanism for resending monitor requests. | |
30 | */ | |
31 | typedef void (*ceph_monc_request_func_t)(struct ceph_mon_client *monc, | |
32 | int newmon); | |
33 | ||
34 | /* a pending monitor request */ | |
35 | struct 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 | /* | |
7a6fdeb2 | 43 | * ceph_mon_generic_request is being used for the statfs and |
513a8243 ID |
44 | * mon_get_version requests which are being done a bit differently |
45 | * because we need to get data back to the caller | |
ba75bb98 | 46 | */ |
f8c76f6f | 47 | struct ceph_mon_generic_request { |
3143edd3 | 48 | struct kref kref; |
ba75bb98 | 49 | u64 tid; |
85ff03f6 | 50 | struct rb_node node; |
ba75bb98 | 51 | int result; |
f8c76f6f | 52 | void *buf; |
ba75bb98 | 53 | struct completion completion; |
ba75bb98 | 54 | struct ceph_msg *request; /* original request */ |
3143edd3 | 55 | struct ceph_msg *reply; /* and reply */ |
ba75bb98 SW |
56 | }; |
57 | ||
58 | struct 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 | ||
4e7a5dcd | 65 | struct ceph_auth_client *auth; |
240ed68e | 66 | struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack; |
9bd2e6f8 | 67 | int pending_auth; |
4e7a5dcd | 68 | |
ba75bb98 SW |
69 | bool hunting; |
70 | int cur_mon; /* last monitor i contacted */ | |
82dcabad ID |
71 | unsigned long sub_renew_after; |
72 | unsigned long sub_renew_sent; | |
67130934 | 73 | struct ceph_connection con; |
ba75bb98 | 74 | |
168b9090 ID |
75 | bool had_a_connection; |
76 | int hunt_mult; /* [1..CEPH_MONC_HUNT_MAX_MULT] */ | |
77 | ||
f8c76f6f YS |
78 | /* pending generic requests */ |
79 | struct rb_root generic_request_tree; | |
80 | int num_generic_requests; | |
ba75bb98 SW |
81 | u64 last_tid; |
82 | ||
82dcabad ID |
83 | /* subs, indexed with CEPH_SUB_* */ |
84 | struct { | |
85 | struct ceph_mon_subscribe_item item; | |
86 | bool want; | |
87 | u32 have; /* epoch */ | |
88 | } subs[3]; | |
ba75bb98 | 89 | |
039934b8 | 90 | #ifdef CONFIG_DEBUG_FS |
ba75bb98 | 91 | struct dentry *debugfs_file; |
039934b8 | 92 | #endif |
ba75bb98 SW |
93 | }; |
94 | ||
95 | extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end); | |
96 | extern int ceph_monmap_contains(struct ceph_monmap *m, | |
97 | struct ceph_entity_addr *addr); | |
98 | ||
99 | extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl); | |
100 | extern void ceph_monc_stop(struct ceph_mon_client *monc); | |
101 | ||
82dcabad ID |
102 | enum { |
103 | CEPH_SUB_MDSMAP = 0, | |
104 | CEPH_SUB_MONMAP, | |
105 | CEPH_SUB_OSDMAP, | |
106 | }; | |
107 | ||
108 | extern const char *ceph_sub_str[]; | |
109 | ||
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110 | /* |
111 | * The model here is to indicate that we need a new map of at least | |
82dcabad | 112 | * epoch @epoch, and also call in when we receive a map. We will |
ba75bb98 SW |
113 | * periodically rerequest the map from the monitor cluster until we |
114 | * get what we want. | |
115 | */ | |
82dcabad ID |
116 | bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch, |
117 | bool continuous); | |
118 | void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch); | |
ba75bb98 SW |
119 | |
120 | extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc); | |
6044cde6 ID |
121 | extern int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch, |
122 | unsigned long timeout); | |
ba75bb98 | 123 | |
ba75bb98 SW |
124 | extern int ceph_monc_do_statfs(struct ceph_mon_client *monc, |
125 | struct ceph_statfs *buf); | |
126 | ||
513a8243 ID |
127 | extern int ceph_monc_do_get_version(struct ceph_mon_client *monc, |
128 | const char *what, u64 *newest); | |
129 | ||
4e7a5dcd SW |
130 | extern int ceph_monc_open_session(struct ceph_mon_client *monc); |
131 | ||
9bd2e6f8 SW |
132 | extern int ceph_monc_validate_auth(struct ceph_mon_client *monc); |
133 | ||
ba75bb98 | 134 | #endif |