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 bool have_fsid; 75 76 /* pending generic requests */ 77 struct rb_root generic_request_tree; 78 int num_generic_requests; 79 u64 last_tid; 80 81 /* mds/osd map */ 82 int want_mdsmap; 83 int want_next_osdmap; /* 1 = want, 2 = want+asked */ 84 u32 have_osdmap, have_mdsmap; 85 86 #ifdef CONFIG_DEBUG_FS 87 struct dentry *debugfs_file; 88 #endif 89 }; 90 91 extern struct ceph_monmap *ceph_monmap_decode(void *p, void *end); 92 extern int ceph_monmap_contains(struct ceph_monmap *m, 93 struct ceph_entity_addr *addr); 94 95 extern int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl); 96 extern void ceph_monc_stop(struct ceph_mon_client *monc); 97 98 /* 99 * The model here is to indicate that we need a new map of at least 100 * epoch @want, and also call in when we receive a map. We will 101 * periodically rerequest the map from the monitor cluster until we 102 * get what we want. 103 */ 104 extern int ceph_monc_got_mdsmap(struct ceph_mon_client *monc, u32 have); 105 extern int ceph_monc_got_osdmap(struct ceph_mon_client *monc, u32 have); 106 107 extern void ceph_monc_request_next_osdmap(struct ceph_mon_client *monc); 108 109 extern int ceph_monc_do_statfs(struct ceph_mon_client *monc, 110 struct ceph_statfs *buf); 111 112 extern int ceph_monc_open_session(struct ceph_mon_client *monc); 113 114 extern int ceph_monc_validate_auth(struct ceph_mon_client *monc); 115 116 extern int ceph_monc_create_snapid(struct ceph_mon_client *monc, 117 u32 pool, u64 *snapid); 118 119 extern int ceph_monc_delete_snapid(struct ceph_mon_client *monc, 120 u32 pool, u64 snapid); 121 122 #endif 123