1 files changed, 200 insertions, 0 deletions
diff --git a/source4/ntvfs/common/opendb.c b/source4/ntvfs/common/opendb.c
new file mode 100644
index 0000000..29081ef
--- /dev/null
+++ b/source4/ntvfs/common/opendb.c
@@ -0,0 +1,200 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   Copyright (C) Andrew Tridgell 2004
+   
+   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/>.
+*/
+
+/*
+  this is the open files database. It implements shared storage of
+  what files are open between server instances, and implements the rules
+  of shared access to files.
+
+  The caller needs to provide a file_key, which specifies what file
+  they are talking about. This needs to be a unique key across all
+  filesystems, and is usually implemented in terms of a device/inode
+  pair.
+
+  Before any operations can be performed the caller needs to establish
+  a lock on the record associated with file_key. That is done by
+  calling odb_lock(). The caller releases this lock by calling
+  talloc_free() on the returned handle.
+
+  All other operations on a record are done by passing the odb_lock()
+  handle back to this module. The handle contains internal
+  information about what file_key is being operated on.
+*/
+
+#include "includes.h"
+#include "ntvfs/ntvfs.h"
+#include "ntvfs/common/ntvfs_common.h"
+#include "cluster/cluster.h"
+#include "param/param.h"
+
+static const struct opendb_ops *ops;
+
+/*
+  set the odb backend ops
+*/
+void odb_set_ops(const struct opendb_ops *new_ops)
+{
+	ops = new_ops;
+}
+
+/*
+  Open up the openfiles.tdb database. Close it down using
+  talloc_free(). We need the imessaging_ctx to allow for pending open
+  notifications.
+*/
+struct odb_context *odb_init(TALLOC_CTX *mem_ctx, 
+				      struct ntvfs_context *ntvfs_ctx)
+{
+	if (ops == NULL) {
+		odb_tdb_init_ops();
+	}
+	return ops->odb_init(mem_ctx, ntvfs_ctx);
+}
+
+/*
+  get a lock on a entry in the odb. This call returns a lock handle,
+  which the caller should unlock using talloc_free().
+*/
+struct odb_lock *odb_lock(TALLOC_CTX *mem_ctx,
+				   struct odb_context *odb, DATA_BLOB *file_key)
+{
+	return ops->odb_lock(mem_ctx, odb, file_key);
+}
+
+DATA_BLOB odb_get_key(TALLOC_CTX *mem_ctx, struct odb_lock *lck)
+{
+	return ops->odb_get_key(mem_ctx, lck);
+}
+
+/*
+  register an open file in the open files database.
+  The share_access rules are implemented by odb_can_open()
+  and it's needed to call odb_can_open() before
+  odb_open_file() otherwise NT_STATUS_INTERNAL_ERROR is returned
+
+  Note that the path is only used by the delete on close logic, not
+  for comparing with other filenames
+*/
+NTSTATUS odb_open_file(struct odb_lock *lck,
+				void *file_handle, const char *path,
+				int *fd, NTTIME open_write_time,
+				bool allow_level_II_oplock,
+				uint32_t oplock_level, uint32_t *oplock_granted)
+{
+	return ops->odb_open_file(lck, file_handle, path,
+				  fd, open_write_time,
+				  allow_level_II_oplock,
+				  oplock_level, oplock_granted);
+}
+
+
+/*
+  register a pending open file in the open files database
+*/
+NTSTATUS odb_open_file_pending(struct odb_lock *lck, void *private_data)
+{
+	return ops->odb_open_file_pending(lck, private_data);
+}
+
+
+/*
+  remove a opendb entry
+*/
+NTSTATUS odb_close_file(struct odb_lock *lck, void *file_handle,
+				 const char **delete_path)
+{
+	return ops->odb_close_file(lck, file_handle, delete_path);
+}
+
+
+/*
+  remove a pending opendb entry
+*/
+NTSTATUS odb_remove_pending(struct odb_lock *lck, void *private_data)
+{
+	return ops->odb_remove_pending(lck, private_data);
+}
+
+
+/*
+  rename the path in a open file
+*/
+NTSTATUS odb_rename(struct odb_lock *lck, const char *path)
+{
+	return ops->odb_rename(lck, path);
+}
+
+/*
+  get back the path of an open file
+*/
+NTSTATUS odb_get_path(struct odb_lock *lck, const char **path)
+{
+	return ops->odb_get_path(lck, path);
+}
+
+/*
+  update delete on close flag on an open file
+*/
+NTSTATUS odb_set_delete_on_close(struct odb_lock *lck, bool del_on_close)
+{
+	return ops->odb_set_delete_on_close(lck, del_on_close);
+}
+
+/*
+  update the write time on an open file
+*/
+NTSTATUS odb_set_write_time(struct odb_lock *lck,
+			    NTTIME write_time, bool force)
+{
+	return ops->odb_set_write_time(lck, write_time, force);
+}
+
+/*
+  return the current value of the delete_on_close bit,
+  and the current write time.
+*/
+NTSTATUS odb_get_file_infos(struct odb_context *odb, DATA_BLOB *key,
+			    bool *del_on_close, NTTIME *write_time)
+{
+	return ops->odb_get_file_infos(odb, key, del_on_close, write_time);
+}
+
+/*
+  determine if a file can be opened with the given share_access,
+  create_options and access_mask
+*/
+NTSTATUS odb_can_open(struct odb_lock *lck,
+			       uint32_t stream_id, uint32_t share_access,
+			       uint32_t access_mask, bool delete_on_close,
+			       uint32_t open_disposition, bool break_to_none)
+{
+	return ops->odb_can_open(lck, stream_id, share_access, access_mask,
+				 delete_on_close, open_disposition, break_to_none);
+}
+
+NTSTATUS odb_update_oplock(struct odb_lock *lck, void *file_handle,
+				    uint32_t oplock_level)
+{
+	return ops->odb_update_oplock(lck, file_handle, oplock_level);
+}
+
+NTSTATUS odb_break_oplocks(struct odb_lock *lck)
+{
+	return ops->odb_break_oplocks(lck);
+}