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 typedef void (*ceph_monc_callback_t)(struct ceph_mon_generic_request *); 43 44 /* 45 * ceph_mon_generic_request is being used for the statfs and 46 * mon_get_version requests which are being done a bit differently 47 * because we need to get data back to the caller 48 */ 49 struct ceph_mon_generic_request { 50 struct ceph_mon_client *monc; 51 struct kref kref; 52 u64 tid; 53 struct rb_node node; 54 int result; 55 56 struct completion completion; 57 ceph_monc_callback_t complete_cb; 58 u64 private_data; /* r_tid/linger_id */ 59 60 struct ceph_msg *request; /* original request */ 61 struct ceph_msg *reply; /* and reply */ 62 63 union { 64 struct ceph_statfs *st; 65 u64 newest; 66 } u; 67 }; 68 69 struct ceph_mon_client { 70 struct ceph_client *client; 71 struct ceph_monmap *monmap; 72 73 struct mutex mutex; 74 struct delayed_work delayed_work; 75 76 struct ceph_auth_client *auth; 77 struct ceph_msg *m_auth, *m_auth_reply, *m_subscribe, *m_subscribe_ack; 78 int pending_auth; 79 80 bool hunting; 81 int cur_mon; /* last monitor i contacted */ 82 unsigned long sub_renew_after; 83 unsigned long sub_renew_sent; 84 struct ceph_connection con; 85 86 bool had_a_connection; 87 int hunt_mult; /* [1..CEPH_MONC_HUNT_MAX_MULT] */ 88 89 /* pending generic requests */ 90 struct rb_root generic_request_tree; 91 u64 last_tid; 92 93 /* subs, indexed with CEPH_SUB_* */ 94 struct { 95 struct ceph_mon_subscribe_item item; 96 bool want; 97 u32 have; /* epoch */ 98 } subs[4]; 99 int fs_cluster_id; /* "mdsmap.<id>" sub */ 100 101 #ifdef CONFIG_DEBUG_FS 102 struct dentry *debugfs_file; 103 #endif 104 }; 105 106 extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end); 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); 112 113 enum { 114 CEPH_SUB_MONMAP = 0, 115 CEPH_SUB_OSDMAP, 116 CEPH_SUB_FSMAP, 117 CEPH_SUB_MDSMAP, 118 }; 119 120 extern const char *ceph_sub_str[]; 121 122 /* 123 * The model here is to indicate that we need a new map of at least 124 * epoch @epoch, and also call in when we receive a map. We will 125 * periodically rerequest the map from the monitor cluster until we 126 * get what we want. 127 */ 128 bool ceph_monc_want_map(struct ceph_mon_client *monc, int sub, u32 epoch, 129 bool continuous); 130 void ceph_monc_got_map(struct ceph_mon_client *monc, int sub, u32 epoch); 131 void ceph_monc_renew_subs(struct ceph_mon_client *monc); 132 133 extern int ceph_monc_wait_osdmap(struct ceph_mon_client *monc, u32 epoch, 134 unsigned long timeout); 135 136 int ceph_monc_do_statfs(struct ceph_mon_client *monc, u64 data_pool, 137 struct ceph_statfs *buf); 138 139 int ceph_monc_get_version(struct ceph_mon_client *monc, const char *what, 140 u64 *newest); 141 int ceph_monc_get_version_async(struct ceph_mon_client *monc, const char *what, 142 ceph_monc_callback_t cb, u64 private_data); 143 144 int ceph_monc_blacklist_add(struct ceph_mon_client *monc, 145 struct ceph_entity_addr *client_addr); 146 147 extern int ceph_monc_open_session(struct ceph_mon_client *monc); 148 149 extern int ceph_monc_validate_auth(struct ceph_mon_client *monc); 150 151 #endif 152