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samba-mirror/ctdb/ctdb.h
Andrew Tridgell 6613b7d438 initial version
(This used to be ctdb commit 5bba7deef9b03a68d336c138e83d6d4fac35bfce)
2006-11-18 10:41:20 +11:00

75 lines
2.1 KiB
C

/*
ctdb database library
Copyright (C) Andrew Tridgell 2006
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
structure passed to a ctdb call function
*/
struct ctdb_call {
TDB_DATA key; /* record key */
TDB_DATA record_data; /* current data in the record */
TDB_DATA *new_data; /* optionally updated record data */
TDB_DATA *call_data; /* optionally passed from caller */
TDB_DATA *reply_data; /* optionally returned by function */
};
#define CTDB_ERR_INVALID 1
#define CTDB_ERR_NOMEM 2
/*
initialise ctdb subsystem
*/
struct ctdb_context *ctdb_init(TALLOC_CTX *mem_ctx);
/*
tell ctdb what nodes are available. This takes a filename, which will contain
1 node address per line, in a transport specific format
*/
int ctdb_set_nlist(struct ctdb_context *ctdb, const char *nlist);
/*
error string for last ctdb error
*/
const char *ctdb_errstr(struct ctdb_context *);
/* a ctdb call function */
typedef int (*ctdb_fn_t)(struct ctdb_call *);
/*
setup a ctdb call function
*/
int ctdb_set_call(struct ctdb_context *ctdb, ctdb_fn_t fn, int id);
/*
attach to a ctdb database
*/
int ctdb_attach(struct ctdb_context *ctdb, const char *name, int tdb_flags,
int open_flags, mode_t mode);
/*
make a ctdb call. The associated ctdb call function will be called on the DMASTER
for the given record
*/
int ctdb_call(struct ctdb_context *ctdb, TDB_DATA key, int call_id,
TDB_DATA *call_data, TDB_DATA *reply_data);