#define TDB_SEQNUM 128 /* maintain a sequence number */
#define TDB_ALLOW_NESTING 256 /* fake nested transactions */
#define TDB_RDONLY 512 /* implied by O_RDONLY */
+#define TDB_VERSION1 1024 /* create/open an old style TDB */
/**
* tdb_close - close and free a tdb.
* This gets an attribute from a TDB which has previously been set (or
* may return the default values). Set @attr.base.attr to the
* attribute type you want get.
- *
- * Currently this does not work for TDB_ATTRIBUTE_OPENHOOK.
*/
enum TDB_ERROR tdb_get_attribute(struct tdb_context *tdb,
union tdb_attribute *attr);
*/
int tdb_fd(const struct tdb_context *tdb);
+/**
+ * tdb_foreach - iterate through every open TDB.
+ * @fn: the function to call for every TDB
+ * @p: the pointer to hand to @fn
+ *
+ * TDB internally keeps track of all open TDBs; this function allows you to
+ * iterate through them. If @fn returns non-zero, traversal stops.
+ */
+#define tdb_foreach(fn, p) \
+ tdb_foreach_(typesafe_cb_preargs(int, void *, (fn), (p), \
+ struct tdb_context *), (p))
+
+void tdb_foreach_(int (*fn)(struct tdb_context *, void *), void *p);
+
/**
* struct tdb_attribute_base - common fields for all tdb attributes.
*/