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diff --git a/source3/include/locking.h b/source3/include/locking.h
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+/*
+ Unix SMB/CIFS implementation.
+ SMB parameters and setup, plus a whole lot more.
+
+ Copyright (C) Jeremy Allison 2006
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _LOCKING_H
+#define _LOCKING_H
+
+/* passed to br lock code - the UNLOCK_LOCK should never be stored into the tdb
+ and is used in calculating POSIX unlock ranges only. We differentiate between
+ PENDING read and write locks to allow posix lock downgrades to trigger a lock
+ re-evaluation. */
+
+enum brl_type {READ_LOCK, WRITE_LOCK, UNLOCK_LOCK};
+enum brl_flavour {WINDOWS_LOCK = 0, POSIX_LOCK = 1};
+
+#include "librpc/gen_ndr/server_id.h"
+#include "librpc/gen_ndr/misc.h"
+
+/* This contains elements that differentiate locks. The smbpid is a
+ client supplied pid, and is essentially the locking context for
+ this client */
+
+struct lock_context {
+ uint64_t smblctx;
+ uint32_t tid;
+ struct server_id pid;
+};
+
+struct files_struct;
+
+#include "lib/file_id.h"
+
+struct byte_range_lock;
+typedef uint64_t br_off;
+
+/* Internal structure in brlock.tdb.
+ The data in brlock records is an unsorted linear array of these
+ records. It is unnecessary to store the count as tdb provides the
+ size of the record */
+
+struct lock_struct {
+ struct lock_context context;
+ br_off start;
+ br_off size;
+ uint64_t fnum;
+ enum brl_type lock_type;
+ enum brl_flavour lock_flav;
+};
+
+struct smbd_lock_element {
+ struct GUID req_guid;
+ uint64_t smblctx;
+ enum brl_type brltype;
+ enum brl_flavour lock_flav;
+ uint64_t offset;
+ uint64_t count;
+};
+
+struct share_mode_lock;
+
+#endif /* _LOCKING_H_ */