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0d71b6d1e6
(This used to be ctdb commit 0697f59a044deeab126a39bff97bcd5c1101298e)
335 lines
10 KiB
C
335 lines
10 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_TORTURE (1<<1)
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#define CTDB_FLAG_RECOVERY (1<<2)
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/*
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a message handler ID meaning "give me all messages"
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*/
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#define CTDB_SRVID_ALL (~(uint64_t)0)
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/*
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srvid type : RECOVERY
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*/
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#define CTDB_SRVTYPE_RECOVERY 0x64766372
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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 the directory for the local databases
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*/
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int ctdb_set_tdb_dir(struct ctdb_context *ctdb, const char *dir);
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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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int ctdb_set_socketname(struct ctdb_context *ctdb, const char *socketname);
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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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int ctdb_start_daemon(struct ctdb_context *ctdb, bool do_fork);
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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);
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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, uint32_t 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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initiate an ordered ctdb cluster shutdown
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this function will never return
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*/
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void ctdb_shutdown(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 *, uint64_t srvid,
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TDB_DATA data, void *);
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int ctdb_set_message_handler(struct ctdb_context *ctdb, uint64_t srvid,
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ctdb_message_fn_t handler,
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void *private_data);
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int ctdb_call(struct ctdb_db_context *ctdb_db, struct ctdb_call *call);
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struct ctdb_client_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_client_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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uint64_t srvid, TDB_DATA data);
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/*
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Fetch a ctdb record from a remote node
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. Underneath this will force the
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dmaster for the record to be moved to the local node.
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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,
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TDB_DATA key, TDB_DATA *data);
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int ctdb_record_store(struct ctdb_record_handle *h, TDB_DATA data);
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int ctdb_register_message_handler(struct ctdb_context *ctdb,
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TALLOC_CTX *mem_ctx,
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uint64_t srvid,
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ctdb_message_fn_t handler,
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void *private_data);
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struct ctdb_db_context *find_ctdb_db(struct ctdb_context *ctdb, uint32_t id);
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struct ctdb_context *ctdb_cmdline_client(struct event_context *ev);
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struct ctdb_status;
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int ctdb_ctrl_status(struct ctdb_context *ctdb, uint32_t destnode, struct ctdb_status *status);
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struct ctdb_vnn_map;
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int ctdb_ctrl_getvnnmap(struct ctdb_context *ctdb,
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struct timeval timeout, uint32_t destnode,
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TALLOC_CTX *mem_ctx, struct ctdb_vnn_map **vnnmap);
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int ctdb_ctrl_setvnnmap(struct ctdb_context *ctdb,
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struct timeval timeout, uint32_t destnode,
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TALLOC_CTX *mem_ctx, struct ctdb_vnn_map *vnnmap);
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/* table that contains a list of all dbids on a node
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*/
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struct ctdb_dbid_map {
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uint32_t num;
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uint32_t dbids[1];
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};
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int ctdb_ctrl_getdbmap(struct ctdb_context *ctdb,
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struct timeval timeout, uint32_t destnode,
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TALLOC_CTX *mem_ctx, struct ctdb_dbid_map **dbmap);
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/* table that contains a list of all nodes a ctdb knows about and their
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status
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*/
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struct ctdb_node_and_flags {
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uint32_t vnn;
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uint32_t flags;
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};
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struct ctdb_node_map {
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uint32_t num;
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struct ctdb_node_and_flags nodes[1];
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};
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int ctdb_ctrl_getnodemap(struct ctdb_context *ctdb,
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struct timeval timeout, uint32_t destnode,
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TALLOC_CTX *mem_ctx, struct ctdb_node_map **nodemap);
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struct ctdb_key_list {
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uint32_t dbid;
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uint32_t num;
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TDB_DATA *keys;
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struct ctdb_ltdb_header *headers;
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uint32_t *lmasters;
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TDB_DATA *data;
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};
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int ctdb_ctrl_pulldb(struct ctdb_context *ctdb, uint32_t destnode, uint32_t dbid, uint32_t lmaster, TALLOC_CTX *mem_ctx, struct ctdb_key_list *keys);
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int ctdb_ctrl_copydb(struct ctdb_context *ctdb,
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struct timeval timeout, uint32_t sourcenode,
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uint32_t destnode, uint32_t dbid, uint32_t lmaster,
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TALLOC_CTX *mem_ctx);
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int ctdb_ctrl_getdbpath(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t dbid, TALLOC_CTX *mem_ctx, const char **path);
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int ctdb_ctrl_getdbname(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t dbid, TALLOC_CTX *mem_ctx, const char **name);
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int ctdb_ctrl_createdb(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, TALLOC_CTX *mem_ctx, const char *name);
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int ctdb_ctrl_process_exists(struct ctdb_context *ctdb, uint32_t destnode, pid_t pid);
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int ctdb_ctrl_ping(struct ctdb_context *ctdb, uint32_t destnode);
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int ctdb_ctrl_get_config(struct ctdb_context *ctdb);
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int ctdb_ctrl_get_debuglevel(struct ctdb_context *ctdb, uint32_t destnode, uint32_t *level);
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int ctdb_ctrl_set_debuglevel(struct ctdb_context *ctdb, uint32_t destnode, uint32_t level);
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/*
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change dmaster for all keys in the database to the new value
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*/
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int ctdb_ctrl_setdmaster(struct ctdb_context *ctdb,
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struct timeval timeout, uint32_t destnode,
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TALLOC_CTX *mem_ctx, uint32_t dbid, uint32_t dmaster);
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/*
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delete all records from a tdb
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*/
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int ctdb_ctrl_cleardb(struct ctdb_context *ctdb, uint32_t destnode, TALLOC_CTX *mem_ctx, uint32_t dbid);
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/*
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bump the rsn number for al records
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*/
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int ctdb_ctrl_bumprsn(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, TALLOC_CTX *mem_ctx, uint32_t dbid);
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/*
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write a record on a specific db (this implicitely updates dmaster of the record to locally be the vnn of the node where the control is executed on)
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*/
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int ctdb_ctrl_write_record(struct ctdb_context *ctdb, uint32_t destnode, TALLOC_CTX *mem_ctx, uint32_t dbid, TDB_DATA key, TDB_DATA data);
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#define CTDB_RECOVERY_NORMAL 0
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#define CTDB_RECOVERY_ACTIVE 1
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/*
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get the recovery mode of a remote node
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*/
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int ctdb_ctrl_getrecmode(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t *recmode);
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/*
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set the recovery mode of a remote node
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*/
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int ctdb_ctrl_setrecmode(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t recmode);
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/*
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get the recovery master of a remote node
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*/
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int ctdb_ctrl_getrecmaster(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t *recmaster);
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/*
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set the recovery master of a remote node
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*/
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int ctdb_ctrl_setrecmaster(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t recmaster);
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uint32_t *ctdb_get_connected_nodes(struct ctdb_context *ctdb,
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struct timeval timeout,
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TALLOC_CTX *mem_ctx,
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uint32_t *num_nodes);
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int ctdb_status_reset(struct ctdb_context *ctdb, uint32_t destnode);
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int ctdb_set_logfile(struct ctdb_context *ctdb, const char *logfile);
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typedef int (*ctdb_traverse_func)(struct ctdb_context *, TDB_DATA, TDB_DATA, void *);
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int ctdb_traverse(struct ctdb_db_context *ctdb_db, ctdb_traverse_func fn, void *private_data);
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int ctdb_dump_db(struct ctdb_db_context *ctdb_db, FILE *f);
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/*
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get the pid of a ctdb daemon
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*/
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int ctdb_ctrl_getpid(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode, uint32_t *pid);
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int ctdb_ctrl_freeze(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode);
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int ctdb_ctrl_thaw(struct ctdb_context *ctdb, struct timeval timeout, uint32_t destnode);
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#endif
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