Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
mon_client.h
Go to the documentation of this file.
1 #ifndef _FS_CEPH_MON_CLIENT_H
2 #define _FS_CEPH_MON_CLIENT_H
3 
4 #include <linux/completion.h>
5 #include <linux/kref.h>
6 #include <linux/rbtree.h>
7 
8 #include <linux/ceph/messenger.h>
9 
10 struct ceph_client;
11 struct ceph_mount_args;
12 struct ceph_auth_client;
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;
25 struct ceph_mon_generic_request;
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 /*
43  * 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
45  * to the caller
46  */
47 struct ceph_mon_generic_request {
48  struct kref kref;
49  u64 tid;
50  struct rb_node node;
51  int result;
52  void *buf;
53  int buf_len;
54  struct completion completion;
55  struct ceph_msg *request; /* original request */
56  struct ceph_msg *reply; /* and reply */
57 };
58 
59 struct ceph_mon_client {
60  struct ceph_client *client;
61  struct ceph_monmap *monmap;
62 
63  struct mutex mutex;
64  struct delayed_work delayed_work;
65 
66  struct ceph_auth_client *auth;
67  struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack;
68  int pending_auth;
69 
70  bool hunting;
71  int cur_mon; /* last monitor i contacted */
72  unsigned long sub_sent, sub_renew_after;
73  struct ceph_connection con;
74 
75  /* pending generic requests */
76  struct rb_root generic_request_tree;
77  int num_generic_requests;
78  u64 last_tid;
79 
80  /* mds/osd map */
81  int want_mdsmap;
82  int want_next_osdmap; /* 1 = want, 2 = want+asked */
83  u32 have_osdmap, have_mdsmap;
84 
85 #ifdef CONFIG_DEBUG_FS
86  struct dentry *debugfs_file;
87 #endif
88 };
89 
90 extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end);
91 extern int ceph_monmap_contains(struct ceph_monmap *m,
92  struct ceph_entity_addr *addr);
93 
94 extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);
95 extern void ceph_monc_stop(struct ceph_mon_client *monc);
96 
97 /*
98  * The model here is to indicate that we need a new map of at least
99  * epoch @want, and also call in when we receive a map. We will
100  * periodically rerequest the map from the monitor cluster until we
101  * get what we want.
102  */
103 extern int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 have);
104 extern int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 have);
105 
106 extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc);
107 
108 extern int ceph_monc_do_statfs(struct ceph_mon_client *monc,
109  struct ceph_statfs *buf);
110 
111 extern int ceph_monc_open_session(struct ceph_mon_client *monc);
112 
113 extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);
114 
115 extern int ceph_monc_create_snapid(struct ceph_mon_client *monc,
116  u32 pool, u64 *snapid);
117 
118 extern int ceph_monc_delete_snapid(struct ceph_mon_client *monc,
119  u32 pool, u64 snapid);
120 
121 #endif
Generated on Thu Jan 10 2013 14:51:11 for Linux Kernel by   doxygen 1.8.2