1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _FS_CEPH_MON_CLIENT_H |
3 | #define _FS_CEPH_MON_CLIENT_H |
4 | |
5 | #include <linux/completion.h> |
6 | #include <linux/kref.h> |
7 | #include <linux/rbtree.h> |
8 | |
9 | #include <linux/ceph/messenger.h> |
10 | |
11 | struct ceph_client; |
12 | struct ceph_mount_args; |
13 | struct ceph_auth_client; |
14 | |
15 | /* |
16 | * The monitor map enumerates the set of all monitors. |
17 | */ |
18 | struct ceph_monmap { |
19 | struct ceph_fsid fsid; |
20 | u32 epoch; |
21 | u32 num_mon; |
22 | struct ceph_entity_inst mon_inst[] __counted_by(num_mon); |
23 | }; |
24 | |
25 | struct ceph_mon_client; |
26 | struct ceph_mon_generic_request; |
27 | |
28 | |
29 | /* |
30 | * Generic mechanism for resending monitor requests. |
31 | */ |
32 | typedef void (*ceph_monc_request_func_t)(struct ceph_mon_client *monc, |
33 | int newmon); |
34 | |
35 | /* a pending monitor request */ |
36 | struct ceph_mon_request { |
37 | struct ceph_mon_client *monc; |
38 | struct delayed_work delayed_work; |
39 | unsigned long delay; |
40 | ceph_monc_request_func_t do_request; |
41 | }; |
42 | |
43 | typedef void (*ceph_monc_callback_t)(struct ceph_mon_generic_request *); |
44 | |
45 | /* |
46 | * ceph_mon_generic_request is being used for the statfs and |
47 | * mon_get_version requests which are being done a bit differently |
48 | * because we need to get data back to the caller |
49 | */ |
50 | struct ceph_mon_generic_request { |
51 | struct ceph_mon_client *monc; |
52 | struct kref kref; |
53 | u64 tid; |
54 | struct rb_node node; |
55 | int result; |
56 | |
57 | struct completion completion; |
58 | ceph_monc_callback_t complete_cb; |
59 | u64 private_data; /* r_tid/linger_id */ |
60 | |
61 | struct ceph_msg *request; /* original request */ |
62 | struct ceph_msg *reply; /* and reply */ |
63 | |
64 | union { |
65 | struct ceph_statfs *st; |
66 | u64 newest; |
67 | } u; |
68 | }; |
69 | |
70 | struct ceph_mon_client { |
71 | struct ceph_client *client; |
72 | struct ceph_monmap *monmap; |
73 | |
74 | struct mutex mutex; |
75 | struct delayed_work delayed_work; |
76 | |
77 | struct ceph_auth_client *auth; |
78 | struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack; |
79 | int pending_auth; |
80 | |
81 | bool hunting; |
82 | int cur_mon; /* last monitor i contacted */ |
83 | unsigned long sub_renew_after; |
84 | unsigned long sub_renew_sent; |
85 | struct ceph_connection con; |
86 | |
87 | bool had_a_connection; |
88 | int hunt_mult; /* [1..CEPH_MONC_HUNT_MAX_MULT] */ |
89 | |
90 | /* pending generic requests */ |
91 | struct rb_root generic_request_tree; |
92 | u64 last_tid; |
93 | |
94 | /* subs, indexed with CEPH_SUB_* */ |
95 | struct { |
96 | struct ceph_mon_subscribe_item item; |
97 | bool want; |
98 | u32 have; /* epoch */ |
99 | } subs[4]; |
100 | int fs_cluster_id; /* "mdsmap.<id>" sub */ |
101 | |
102 | #ifdef CONFIG_DEBUG_FS |
103 | struct dentry *debugfs_file; |
104 | #endif |
105 | }; |
106 | |
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 | extern void ceph_monc_reopen_session(struct ceph_mon_client *monc); |
113 | |
114 | enum { |
115 | CEPH_SUB_MONMAP = 0, |
116 | CEPH_SUB_OSDMAP, |
117 | CEPH_SUB_FSMAP, |
118 | CEPH_SUB_MDSMAP, |
119 | }; |
120 | |
121 | extern const char *ceph_sub_str[]; |
122 | |
123 | /* |
124 | * The model here is to indicate that we need a new map of at least |
125 | * epoch @epoch, and also call in when we receive a map. We will |
126 | * periodically rerequest the map from the monitor cluster until we |
127 | * get what we want. |
128 | */ |
129 | bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch, |
130 | bool continuous); |
131 | void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch); |
132 | void ceph_monc_renew_subs(struct ceph_mon_client *monc); |
133 | |
134 | extern int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch, |
135 | unsigned long timeout); |
136 | |
137 | int ceph_monc_do_statfs(struct ceph_mon_client *monc, u64 data_pool, |
138 | struct ceph_statfs *buf); |
139 | |
140 | int ceph_monc_get_version(struct ceph_mon_client *monc, const char *what, |
141 | u64 *newest); |
142 | int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what, |
143 | ceph_monc_callback_t cb, u64 private_data); |
144 | |
145 | int ceph_monc_blocklist_add(struct ceph_mon_client *monc, |
146 | struct ceph_entity_addr *client_addr); |
147 | |
148 | extern int ceph_monc_open_session(struct ceph_mon_client *monc); |
149 | |
150 | extern int ceph_monc_validate_auth(struct ceph_mon_client *monc); |
151 | |
152 | #endif |
153 | |