#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 */
+#define TDB_CANT_CHECK 2048 /* has a feature which we don't understand */
+
+/**
+ * tdb1_incompatible_hash - better (Jenkins) hash for tdb1
+ *
+ * This is better than the default hash for tdb1; but older versions of the
+ * tdb library (prior to version 1.2.6) won't be able to open them.
+ *
+ * It only makes sense to specify this (using tdb_attribute_hash) when
+ * creating (with O_CREAT) an old tdb version using TDB_VERSION1. It's
+ * equivalent to the TDB_INCOMPATIBLE_HASH flag for tdb1.
+ */
+uint64_t tdb1_incompatible_hash(const void *, size_t, uint64_t, void *);
/**
* tdb_close - close and free a tdb.
*/
enum TDB_ERROR tdb_wipe_all(struct tdb_context *tdb);
+/**
+ * tdb_repack - repack the database
+ * @tdb: the tdb context returned from tdb_open()
+ *
+ * This repacks the database; if it is suffering from a great deal of
+ * fragmentation this might help. However, it can take twice the
+ * memory of the existing TDB.
+ */
+enum TDB_ERROR tdb_repack(struct tdb_context *tdb);
+
/**
* tdb_check - check a TDB for consistency
* @tdb: the tdb context returned from tdb_open()
* checks as well. If check() returns an error, that is returned from
* tdb_check().
*
+ * Note that the TDB uses a feature which we don't understand which
+ * indicates we can't run tdb_check(), this will log a warning to that
+ * effect and return TDB_SUCCESS. You can detect this condition by
+ * looking for TDB_CANT_CHECK in tdb_get_flags().
+ *
* Returns TDB_SUCCESS or an error.
*/
#define tdb_check(tdb, check, data) \
TDB_ATTRIBUTE_OPENHOOK = 4,
TDB_ATTRIBUTE_FLOCK = 5,
TDB_ATTRIBUTE_TDB1_HASHSIZE = 128,
+ TDB_ATTRIBUTE_TDB1_MAX_DEAD = 129,
};
/**
unsigned int hsize;
};
+/**
+ * struct tdb_attribute_tdb1_max_dead - tdb1 number of maximum dead records.
+ *
+ * TDB1 has a method to speed up its slow free list: it lets a certain
+ * number of "dead" records build up before freeing them. This is
+ * particularly useful for volatile TDBs; setting it to 5 is
+ * equivalent to tdb1's TDB_VOLATILE flag.
+ */
+struct tdb_attribute_tdb1_max_dead {
+ struct tdb_attribute_base base; /* .attr = TDB_ATTRIBUTE_TDB1_MAX_DEAD */
+ unsigned int max_dead;
+};
+
/**
* union tdb_attribute - tdb attributes.
*
struct tdb_attribute_openhook openhook;
struct tdb_attribute_flock flock;
struct tdb_attribute_tdb1_hashsize tdb1_hashsize;
+ struct tdb_attribute_tdb1_max_dead tdb1_max_dead;
};
#ifdef __cplusplus