#define TDB_RDONLY 512 /* implied by O_RDONLY */
#define TDB_VERSION1 1024 /* create/open an old style TDB */
+/**
+ * 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.
* @tdb: the tdb context returned from tdb_open()
*/
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()
TDB_ATTRIBUTE_SEED = 2,
TDB_ATTRIBUTE_STATS = 3,
TDB_ATTRIBUTE_OPENHOOK = 4,
- TDB_ATTRIBUTE_FLOCK = 5
+ TDB_ATTRIBUTE_FLOCK = 5,
+ TDB_ATTRIBUTE_TDB1_HASHSIZE = 128,
+ TDB_ATTRIBUTE_TDB1_MAX_DEAD = 129,
};
/**
* of the same type. It returns TDB_ERR_EINVAL if the attribute is
* unknown or invalid.
*
- * Note that TDB_ATTRIBUTE_HASH, TDB_ATTRIBUTE_SEED and
- * TDB_ATTRIBUTE_OPENHOOK cannot currently be set after tdb_open.
+ * Note that TDB_ATTRIBUTE_HASH, TDB_ATTRIBUTE_SEED,
+ * TDB_ATTRIBUTE_OPENHOOK and TDB_ATTRIBUTE_TDB1_HASHSIZE cannot
+ * currently be set after tdb_open.
*/
enum TDB_ERROR tdb_set_attribute(struct tdb_context *tdb,
const union tdb_attribute *attr);
void *data;
};
+/**
+ * struct tdb_attribute_tdb1_hashsize - tdb1 hashsize
+ *
+ * This attribute allows setting the TDB1 hashsize; it only makes sense with
+ * O_CREAT and TDB_VERSION1.
+ *
+ * Hashsize should generally be a prime, such as 10007.
+ */
+struct tdb_attribute_tdb1_hashsize {
+ struct tdb_attribute_base base; /* .attr = TDB_ATTRIBUTE_TDB1_HASHSIZE */
+ 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_stats stats;
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