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 44 * mon_get_version requests which are being done a bit differently 45 * because we need to get data back 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 struct completion completion; 54 struct ceph_msg *request; /* original request */ 55 struct ceph_msg *reply; /* and reply */ 56 }; 57 58 struct ceph_mon_client { 59 struct ceph_client *client; 60 struct ceph_monmap *monmap; 61 62 struct mutex mutex; 63 struct delayed_work delayed_work; 64 65 struct ceph_auth_client *auth; 66 struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack; 67 int pending_auth; 68 69 bool hunting; 70 int cur_mon; /* last monitor i contacted */ 71 unsigned long sub_renew_after; 72 unsigned long sub_renew_sent; 73 struct ceph_connection con; 74 75 bool had_a_connection; 76 int hunt_mult; /* [1..CEPH_MONC_HUNT_MAX_MULT] */ 77 78 /* pending generic requests */ 79 struct rb_root generic_request_tree; 80 int num_generic_requests; 81 u64 last_tid; 82 83 /* subs, indexed with CEPH_SUB_* */ 84 struct { 85 struct ceph_mon_subscribe_item item; 86 bool want; 87 u32 have; /* epoch */ 88 } subs[3]; 89 90 #ifdef CONFIG_DEBUG_FS 91 struct dentry *debugfs_file; 92 #endif 93 }; 94 95 extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end); 96 extern int ceph_monmap_contains(struct ceph_monmap *m, 97 struct ceph_entity_addr *addr); 98 99 extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl); 100 extern void ceph_monc_stop(struct ceph_mon_client *monc); 101 102 enum { 103 CEPH_SUB_MDSMAP = 0, 104 CEPH_SUB_MONMAP, 105 CEPH_SUB_OSDMAP, 106 }; 107 108 extern const char *ceph_sub_str[]; 109 110 /* 111 * The model here is to indicate that we need a new map of at least 112 * epoch @epoch, and also call in when we receive a map. We will 113 * periodically rerequest the map from the monitor cluster until we 114 * get what we want. 115 */ 116 bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch, 117 bool continuous); 118 void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch); 119 120 extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc); 121 extern int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch, 122 unsigned long timeout); 123 124 extern int ceph_monc_do_statfs(struct ceph_mon_client *monc, 125 struct ceph_statfs *buf); 126 127 extern int ceph_monc_do_get_version(struct ceph_mon_client *monc, 128 const char *what, u64 *newest); 129 130 extern int ceph_monc_open_session(struct ceph_mon_client *monc); 131 132 extern int ceph_monc_validate_auth(struct ceph_mon_client *monc); 133 134 #endif 135