1 #ifndef _FS_CEPH_MON_CLIENT_H
2 #define _FS_CEPH_MON_CLIENT_H
4 #include <linux/completion.h>
5 #include <linux/radix-tree.h>
11 struct ceph_mount_args;
14 * The monitor map enumerates the set of all monitors.
17 struct ceph_fsid fsid;
20 struct ceph_entity_inst mon_inst[0];
23 struct ceph_mon_client;
24 struct ceph_mon_statfs_request;
28 * Generic mechanism for resending monitor requests.
30 typedef void (*ceph_monc_request_func_t)(struct ceph_mon_client *monc,
33 /* a pending monitor request */
34 struct ceph_mon_request {
35 struct ceph_mon_client *monc;
36 struct delayed_work delayed_work;
38 ceph_monc_request_func_t do_request;
42 * statfs() is done a bit differently because we need to get data back
45 struct ceph_mon_statfs_request {
48 struct ceph_statfs *buf;
49 struct completion completion;
50 unsigned long last_attempt, delay; /* jiffies */
51 struct ceph_msg *request; /* original request */
54 struct ceph_mon_client {
55 struct ceph_client *client;
56 struct ceph_monmap *monmap;
59 struct delayed_work delayed_work;
62 int cur_mon; /* last monitor i contacted */
63 unsigned long sub_sent, sub_renew_after;
64 struct ceph_connection *con;
67 struct ceph_msgpool msgpool_mount_ack;
68 struct ceph_msgpool msgpool_subscribe_ack;
69 struct ceph_msgpool msgpool_statfs_reply;
71 /* pending statfs requests */
72 struct radix_tree_root statfs_request_tree;
73 int num_statfs_requests;
76 /* mds/osd map or mount requests */
78 int want_next_osdmap; /* 1 = want, 2 = want+asked */
79 u32 have_osdmap, have_mdsmap;
81 #ifdef CONFIG_DEBUG_FS
82 struct dentry *debugfs_file;
86 extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end);
87 extern int ceph_monmap_contains(struct ceph_monmap *m,
88 struct ceph_entity_addr *addr);
90 extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl);
91 extern void ceph_monc_stop(struct ceph_mon_client *monc);
94 * The model here is to indicate that we need a new map of at least
95 * epoch @want, and also call in when we receive a map. We will
96 * periodically rerequest the map from the monitor cluster until we
99 extern int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 have);
100 extern int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 have);
102 extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc);
104 extern int ceph_monc_request_mount(struct ceph_mon_client *monc);
106 extern int ceph_monc_do_statfs(struct ceph_mon_client *monc,
107 struct ceph_statfs *buf);