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190b97f0ed
send the correct structure back to a client assorted other cleanups (tests/test1.sh now works in daemon mode) (This used to be ctdb commit f4593754cab750dfdb9384884502e2e1b8fde1f0)
190 lines
5.2 KiB
C
190 lines
5.2 KiB
C
/*
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ctdb database library
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Copyright (C) Andrew Tridgell 2006
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _CTDB_H
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#define _CTDB_H
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#define CTDB_IMMEDIATE_MIGRATION 0x00000001
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struct ctdb_call {
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int call_id;
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TDB_DATA key;
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TDB_DATA call_data;
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TDB_DATA reply_data;
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uint32_t status;
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uint32_t flags;
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};
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/*
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structure passed to a ctdb call backend function
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*/
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struct ctdb_call_info {
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TDB_DATA key; /* record key */
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TDB_DATA record_data; /* current data in the record */
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TDB_DATA *new_data; /* optionally updated record data */
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TDB_DATA *call_data; /* optionally passed from caller */
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TDB_DATA *reply_data; /* optionally returned by function */
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uint32_t status; /* optional reply status - defaults to zero */
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};
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#define CTDB_ERR_INVALID 1
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#define CTDB_ERR_NOMEM 2
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/*
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ctdb flags
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*/
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#define CTDB_FLAG_SELF_CONNECT (1<<0)
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#define CTDB_FLAG_DAEMON_MODE (1<<1)
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struct event_context;
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/*
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initialise ctdb subsystem
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*/
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struct ctdb_context *ctdb_init(struct event_context *ev);
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/*
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choose the transport
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*/
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int ctdb_set_transport(struct ctdb_context *ctdb, const char *transport);
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/*
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set some flags
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*/
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void ctdb_set_flags(struct ctdb_context *ctdb, unsigned flags);
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/*
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clear some flags
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*/
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void ctdb_clear_flags(struct ctdb_context *ctdb, unsigned flags);
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/*
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set max acess count before a dmaster migration
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*/
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void ctdb_set_max_lacount(struct ctdb_context *ctdb, unsigned count);
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/*
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tell ctdb what address to listen on, in transport specific format
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*/
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int ctdb_set_address(struct ctdb_context *ctdb, const char *address);
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/*
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tell ctdb what nodes are available. This takes a filename, which will contain
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1 node address per line, in a transport specific format
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*/
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int ctdb_set_nlist(struct ctdb_context *ctdb, const char *nlist);
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/*
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start the ctdb protocol
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*/
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int ctdb_start(struct ctdb_context *ctdb);
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/*
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attach to a ctdb database
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*/
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struct ctdb_db_context *ctdb_attach(struct ctdb_context *ctdb, const char *name, int tdb_flags,
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int open_flags, mode_t mode);
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/*
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find an attached ctdb_db handle given a name
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*/
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struct ctdb_db_context *ctdb_db_handle(struct ctdb_context *ctdb, const char *name);
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/*
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error string for last ctdb error
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*/
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const char *ctdb_errstr(struct ctdb_context *);
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/* a ctdb call function */
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typedef int (*ctdb_fn_t)(struct ctdb_call_info *);
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/*
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setup a ctdb call function
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*/
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int ctdb_set_call(struct ctdb_db_context *ctdb_db, ctdb_fn_t fn, int id);
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/*
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make a ctdb call. The associated ctdb call function will be called on the DMASTER
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for the given record
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*/
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int ctdb_call(struct ctdb_db_context *ctdb_db, struct ctdb_call *call);
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/*
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wait for all nodes to be connected - useful for test code
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*/
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void ctdb_connect_wait(struct ctdb_context *ctdb);
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/*
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wait until we're the only node left
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*/
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void ctdb_wait_loop(struct ctdb_context *ctdb);
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/* return vnn of this node */
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uint32_t ctdb_get_vnn(struct ctdb_context *ctdb);
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/*
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return the number of nodes
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*/
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uint32_t ctdb_get_num_nodes(struct ctdb_context *ctdb);
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/* setup a handler for ctdb messages */
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typedef void (*ctdb_message_fn_t)(struct ctdb_context *, uint32_t srvid,
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TDB_DATA data, void *);
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int ctdb_set_message_handler(struct ctdb_context *ctdb, ctdb_message_fn_t handler,
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void *private);
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int ctdb_call(struct ctdb_db_context *ctdb_db, struct ctdb_call *call);
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struct ctdb_call_state *ctdb_call_send(struct ctdb_db_context *ctdb_db, struct ctdb_call *call);
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int ctdb_call_recv(struct ctdb_call_state *state, struct ctdb_call *call);
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/* send a ctdb message */
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int ctdb_send_message(struct ctdb_context *ctdb, uint32_t vnn,
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uint32_t srvid, TDB_DATA data);
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/*
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fetch and lock a ctdb record. Underneath this will force the
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dmaster for the record to be moved to the local node.
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The lock is released when is talloc_free() is called on the
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returned ctdb_record_handle.
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*/
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struct ctdb_record_handle *ctdb_fetch_lock(struct ctdb_db_context *ctdb_db, TALLOC_CTX *mem_ctx, TDB_DATA key, TDB_DATA *data);
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/*
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change the data in a record held with a ctdb_record_handle
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if the new data is zero length, this implies a delete of the record
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*/
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int ctdb_record_store(struct ctdb_record_handle *rec, TDB_DATA data);
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struct ctdb_partial {
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uint8_t *data;
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uint32_t length;
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};
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/* callback is called with data==NULL for fauilures. the callback must test for this and do cleanup appropriately */
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typedef void (*partial_cb_fn_t)(uint8_t *data, int cnt, void *args);
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void ctdb_read_pdu(int fd, TALLOC_CTX *ctx, struct ctdb_partial *partial, partial_cb_fn_t func, void *args);
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#endif
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