1 files changed, 78 insertions, 0 deletions
diff --git a/source3/include/locking.h b/source3/include/locking.h
new file mode 100644
index 0000000000..b2b7236721
--- /dev/null
+++ b/source3/include/locking.h
@@ -0,0 +1,78 @@
+/* 
+   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, PENDING_READ_LOCK, PENDING_WRITE_LOCK, UNLOCK_LOCK};
+enum brl_flavour {WINDOWS_LOCK = 0, POSIX_LOCK = 1};
+
+#define IS_PENDING_LOCK(type) ((type) == PENDING_READ_LOCK || (type) == PENDING_WRITE_LOCK)
+
+/* 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 {
+	uint32 smbpid;
+	uint16 tid;
+	struct server_id pid;
+};
+
+struct files_struct;
+
+struct file_id {
+	/* we don't use SMB_DEV_T and SMB_INO_T as we want a fixed size here,
+	   and we may be using file system specific code to fill in something
+	   other than a dev_t for the device */
+	uint64_t devid;
+	uint64_t inode;
+};
+
+struct byte_range_lock {
+	struct files_struct *fsp;
+	unsigned int num_locks;
+	bool modified;
+	bool read_only;
+	struct file_id key;
+	struct lock_struct *lock_data;
+	struct db_record *record;
+};
+
+/* 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;
+	uint16 fnum;
+	enum brl_type lock_type;
+	enum brl_flavour lock_flav;
+};
+
+#endif /* _LOCKING_H_ */