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45e61fcf61
This will be used to enforce a lock hierarchy between the databases. We have seen deadlocks between locking.tdb, brlock.tdb, serverid.tdb and notify*.tdb. These should be fixed by refusing a dbwrap_fetch_locked that does not follow a defined lock hierarchy.
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/*
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Unix SMB/CIFS implementation.
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Database interface wrapper around tdb
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Copyright (C) Volker Lendecke 2005-2007
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __DBWRAP_OPEN_H__
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#define __DBWRAP_OPEN_H__
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struct db_context;
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/**
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* Convenience function to check whether a tdb database
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* is local or clustered (ctdb) in a clustered environment.
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*/
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bool db_is_local(const char *name);
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enum dbwrap_lock_order {
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DBWRAP_LOCK_ORDER_1 = 1,
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DBWRAP_LOCK_ORDER_2 = 2
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};
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/**
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* Convenience function that will determine whether to
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* open a tdb database via the tdb backend or via the ctdb
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* backend, based on lp_clustering() and a db-specific
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* settings.
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*/
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struct db_context *db_open(TALLOC_CTX *mem_ctx,
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const char *name,
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int hash_size, int tdb_flags,
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int open_flags, mode_t mode,
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enum dbwrap_lock_order lock_order);
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#endif /* __DBWRAP_OPEN_H__ */
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