4 Copyright (C) Andrew Tridgell 2006
6 This library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2 of the License, or (at your option) any later version.
11 This library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with this library; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #define CTDB_IMMEDIATE_MIGRATION 0x00000001
35 structure passed to a ctdb call backend function
37 struct ctdb_call_info {
38 TDB_DATA key; /* record key */
39 TDB_DATA record_data; /* current data in the record */
40 TDB_DATA *new_data; /* optionally updated record data */
41 TDB_DATA *call_data; /* optionally passed from caller */
42 TDB_DATA *reply_data; /* optionally returned by function */
43 uint32_t status; /* optional reply status - defaults to zero */
46 #define CTDB_ERR_INVALID 1
47 #define CTDB_ERR_NOMEM 2
52 #define CTDB_FLAG_SELF_CONNECT (1<<0)
53 #define CTDB_FLAG_TORTURE (1<<1)
57 a message handler ID meaning "give me all messages"
59 #define CTDB_SRVID_ALL 0xFFFFFFFF
64 initialise ctdb subsystem
66 struct ctdb_context *ctdb_init(struct event_context *ev);
71 int ctdb_set_transport(struct ctdb_context *ctdb, const char *transport);
74 set the directory for the local databases
76 int ctdb_set_tdb_dir(struct ctdb_context *ctdb, const char *dir);
81 void ctdb_set_flags(struct ctdb_context *ctdb, unsigned flags);
86 void ctdb_clear_flags(struct ctdb_context *ctdb, unsigned flags);
89 set max acess count before a dmaster migration
91 void ctdb_set_max_lacount(struct ctdb_context *ctdb, unsigned count);
94 tell ctdb what address to listen on, in transport specific format
96 int ctdb_set_address(struct ctdb_context *ctdb, const char *address);
99 tell ctdb what nodes are available. This takes a filename, which will contain
100 1 node address per line, in a transport specific format
102 int ctdb_set_nlist(struct ctdb_context *ctdb, const char *nlist);
105 start the ctdb protocol
107 int ctdb_start(struct ctdb_context *ctdb);
110 attach to a ctdb database
112 struct ctdb_db_context *ctdb_attach(struct ctdb_context *ctdb, const char *name, int tdb_flags,
113 int open_flags, mode_t mode);
116 find an attached ctdb_db handle given a name
118 struct ctdb_db_context *ctdb_db_handle(struct ctdb_context *ctdb, const char *name);
121 error string for last ctdb error
123 const char *ctdb_errstr(struct ctdb_context *);
125 /* a ctdb call function */
126 typedef int (*ctdb_fn_t)(struct ctdb_call_info *);
129 setup a ctdb call function
131 int ctdb_set_call(struct ctdb_db_context *ctdb_db, ctdb_fn_t fn, int id);
136 make a ctdb call. The associated ctdb call function will be called on the DMASTER
139 int ctdb_call(struct ctdb_db_context *ctdb_db, struct ctdb_call *call);
142 wait for all nodes to be connected - useful for test code
144 void ctdb_connect_wait(struct ctdb_context *ctdb);
147 initiate an ordered ctdb cluster shutdown
148 this function will never return
150 void ctdb_shutdown(struct ctdb_context *ctdb);
152 /* return vnn of this node */
153 uint32_t ctdb_get_vnn(struct ctdb_context *ctdb);
156 return the number of nodes
158 uint32_t ctdb_get_num_nodes(struct ctdb_context *ctdb);
160 /* setup a handler for ctdb messages */
161 typedef void (*ctdb_message_fn_t)(struct ctdb_context *, uint32_t srvid,
162 TDB_DATA data, void *);
163 int ctdb_set_message_handler(struct ctdb_context *ctdb, uint32_t srvid,
164 ctdb_message_fn_t handler,
168 int ctdb_call(struct ctdb_db_context *ctdb_db, struct ctdb_call *call);
169 struct ctdb_client_call_state *ctdb_call_send(struct ctdb_db_context *ctdb_db, struct ctdb_call *call);
170 int ctdb_call_recv(struct ctdb_client_call_state *state, struct ctdb_call *call);
172 /* send a ctdb message */
173 int ctdb_send_message(struct ctdb_context *ctdb, uint32_t vnn,
174 uint32_t srvid, TDB_DATA data);
178 Fetch a ctdb record from a remote node
179 . Underneath this will force the
180 dmaster for the record to be moved to the local node.
183 struct ctdb_record_handle *ctdb_fetch_lock(struct ctdb_db_context *ctdb_db, TALLOC_CTX *mem_ctx,
184 TDB_DATA key, TDB_DATA *data);
188 do a fetch lock from a client to the local daemon
190 #define FETCH_LOCK_SUCCESS 0
191 #define FETCH_LOCK_LOCKFAILED 1
192 #define FETCH_LOCK_FETCHFAILED 2
193 #define FETCH_LOCK_DMASTERFAILED 3
195 int ctdb_client_fetch_lock(struct ctdb_db_context *ctdb_db,
197 TDB_DATA key, TDB_DATA *data);
200 int ctdb_record_store(struct ctdb_record_handle *h, TDB_DATA data);
202 int ctdb_register_message_handler(struct ctdb_context *ctdb,
205 ctdb_message_fn_t handler,
208 struct ctdb_db_context *find_ctdb_db(struct ctdb_context *ctdb, uint32_t id);
211 struct ctdb_context *ctdb_cmdline_client(struct event_context *ev, const char *ctdb_socket);
214 int ctdb_status(struct ctdb_context *ctdb, struct ctdb_status *status);