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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 | ||
d0b19705 ID |
42 | typedef void (*ceph_monc_callback_t)(struct ceph_mon_generic_request *); |
43 | ||
ba75bb98 | 44 | /* |
7a6fdeb2 | 45 | * ceph_mon_generic_request is being used for the statfs and |
513a8243 ID |
46 | * mon_get_version requests which are being done a bit differently |
47 | * because we need to get data back to the caller | |
ba75bb98 | 48 | */ |
f8c76f6f | 49 | struct ceph_mon_generic_request { |
d0b19705 | 50 | struct ceph_mon_client *monc; |
3143edd3 | 51 | struct kref kref; |
ba75bb98 | 52 | u64 tid; |
85ff03f6 | 53 | struct rb_node node; |
ba75bb98 | 54 | int result; |
d0b19705 | 55 | |
ba75bb98 | 56 | struct completion completion; |
d0b19705 ID |
57 | ceph_monc_callback_t complete_cb; |
58 | u64 private_data; /* r_tid/linger_id */ | |
59 | ||
ba75bb98 | 60 | struct ceph_msg *request; /* original request */ |
3143edd3 | 61 | struct ceph_msg *reply; /* and reply */ |
d0b19705 ID |
62 | |
63 | union { | |
64 | struct ceph_statfs *st; | |
65 | u64 newest; | |
66 | } u; | |
ba75bb98 SW |
67 | }; |
68 | ||
69 | struct ceph_mon_client { | |
70 | struct ceph_client *client; | |
71 | struct ceph_monmap *monmap; | |
72 | ||
73 | struct mutex mutex; | |
74 | struct delayed_work delayed_work; | |
75 | ||
4e7a5dcd | 76 | struct ceph_auth_client *auth; |
240ed68e | 77 | struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack; |
9bd2e6f8 | 78 | int pending_auth; |
4e7a5dcd | 79 | |
ba75bb98 SW |
80 | bool hunting; |
81 | int cur_mon; /* last monitor i contacted */ | |
82dcabad ID |
82 | unsigned long sub_renew_after; |
83 | unsigned long sub_renew_sent; | |
67130934 | 84 | struct ceph_connection con; |
ba75bb98 | 85 | |
168b9090 ID |
86 | bool had_a_connection; |
87 | int hunt_mult; /* [1..CEPH_MONC_HUNT_MAX_MULT] */ | |
88 | ||
f8c76f6f YS |
89 | /* pending generic requests */ |
90 | struct rb_root generic_request_tree; | |
ba75bb98 SW |
91 | u64 last_tid; |
92 | ||
82dcabad ID |
93 | /* subs, indexed with CEPH_SUB_* */ |
94 | struct { | |
95 | struct ceph_mon_subscribe_item item; | |
96 | bool want; | |
97 | u32 have; /* epoch */ | |
0cabbd94 | 98 | } subs[4]; |
737cc81e | 99 | int fs_cluster_id; /* "mdsmap.<id>" sub */ |
ba75bb98 | 100 | |
039934b8 | 101 | #ifdef CONFIG_DEBUG_FS |
ba75bb98 | 102 | struct dentry *debugfs_file; |
039934b8 | 103 | #endif |
ba75bb98 SW |
104 | }; |
105 | ||
106 | extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end); | |
107 | extern int ceph_monmap_contains(struct ceph_monmap *m, | |
108 | struct ceph_entity_addr *addr); | |
109 | ||
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 | ||
82dcabad | 113 | enum { |
0cabbd94 | 114 | CEPH_SUB_MONMAP = 0, |
82dcabad | 115 | CEPH_SUB_OSDMAP, |
0cabbd94 YZ |
116 | CEPH_SUB_FSMAP, |
117 | CEPH_SUB_MDSMAP, | |
82dcabad ID |
118 | }; |
119 | ||
120 | extern const char *ceph_sub_str[]; | |
121 | ||
ba75bb98 SW |
122 | /* |
123 | * The model here is to indicate that we need a new map of at least | |
82dcabad | 124 | * epoch @epoch, and also call in when we receive a map. We will |
ba75bb98 SW |
125 | * periodically rerequest the map from the monitor cluster until we |
126 | * get what we want. | |
127 | */ | |
82dcabad ID |
128 | bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch, |
129 | bool continuous); | |
130 | void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch); | |
42c1b124 | 131 | void ceph_monc_renew_subs(struct ceph_mon_client *monc); |
ba75bb98 | 132 | |
6044cde6 ID |
133 | extern int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch, |
134 | unsigned long timeout); | |
ba75bb98 | 135 | |
ba75bb98 SW |
136 | extern int ceph_monc_do_statfs(struct ceph_mon_client *monc, |
137 | struct ceph_statfs *buf); | |
138 | ||
d0b19705 ID |
139 | int ceph_monc_get_version(struct ceph_mon_client *monc, const char *what, |
140 | u64 *newest); | |
141 | int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what, | |
142 | ceph_monc_callback_t cb, u64 private_data); | |
513a8243 | 143 | |
4e7a5dcd SW |
144 | extern int ceph_monc_open_session(struct ceph_mon_client *monc); |
145 | ||
9bd2e6f8 SW |
146 | extern int ceph_monc_validate_auth(struct ceph_mon_client *monc); |
147 | ||
ba75bb98 | 148 | #endif |