tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _FS_CEPH_MON_CLIENT_H
2#define _FS_CEPH_MON_CLIENT_H
3
4#include <linux/completion.h>
5#include <linux/rbtree.h>
6
7#include "messenger.h"
8#include "msgpool.h"
9
10struct ceph_client;
11struct ceph_mount_args;
12struct ceph_auth_client;
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 {
47 u64 tid;
48 struct rb_node node;
49 int result;
50 struct ceph_statfs *buf;
51 struct completion completion;
52 unsigned long last_attempt, delay; /* jiffies */
53 struct ceph_msg *request; /* original request */
54};
55
56struct ceph_mon_client {
57 struct ceph_client *client;
58 struct ceph_monmap *monmap;
59
60 struct mutex mutex;
61 struct delayed_work delayed_work;
62
63 struct ceph_auth_client *auth;
64 struct ceph_msg *m_auth;
65 int pending_auth;
66
67 bool hunting;
68 int cur_mon; /* last monitor i contacted */
69 unsigned long sub_sent, sub_renew_after;
70 struct ceph_connection *con;
71 bool have_fsid;
72
73 /* msg pools */
74 struct ceph_msgpool msgpool_subscribe_ack;
75 struct ceph_msgpool msgpool_statfs_reply;
76 struct ceph_msgpool msgpool_auth_reply;
77
78 /* pending statfs requests */
79 struct rb_root statfs_request_tree;
80 int num_statfs_requests;
81 u64 last_tid;
82
83 /* mds/osd map */
84 int want_next_osdmap; /* 1 = want, 2 = want+asked */
85 u32 have_osdmap, have_mdsmap;
86
87#ifdef CONFIG_DEBUG_FS
88 struct dentry *debugfs_file;
89#endif
90};
91
92extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end);
93extern int ceph_monmap_contains(struct ceph_monmap *m,
94 struct ceph_entity_addr *addr);
95
96extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);
97extern void ceph_monc_stop(struct ceph_mon_client *monc);
98
99/*
100 * The model here is to indicate that we need a new map of at least
101 * epoch @want, and also call in when we receive a map. We will
102 * periodically rerequest the map from the monitor cluster until we
103 * get what we want.
104 */
105extern int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 have);
106extern int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 have);
107
108extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc);
109
110extern int ceph_monc_do_statfs(struct ceph_mon_client *monc,
111 struct ceph_statfs *buf);
112
113extern int ceph_monc_open_session(struct ceph_mon_client *monc);
114
115extern int ceph_monc_validate_auth(struct ceph_mon_client *monc);
116
117
118
119#endif