tdb: add Bob Jenkins lookup3 hash as helper hash.

[metze/ctdb/wip.git] / lib / tdb / common / tdb_private.h

diff --git a/lib/tdb/common/tdb_private.h b/lib/tdb/common/tdb_private.h
index e2167132b4844275472235db6d7f04de1bfc2c08..fe3603c1043f444a51c50cdb22b246250d38d405 100644 (file)
--- a/lib/tdb/common/tdb_private.h
+++ b/lib/tdb/common/tdb_private.h
@@ -147,7 +147,9 @@ struct tdb_header {
        tdb_off_t rwlocks; /* obsolete - kept to detect old formats */
        tdb_off_t recovery_start; /* offset of transaction recovery region */
        tdb_off_t sequence_number; /* used when TDB_SEQNUM is set */
-       tdb_off_t reserved[29];
+       uint32_t magic1_hash; /* hash of TDB_MAGIC_FOOD. */
+       uint32_t magic2_hash; /* hash of TDB_MAGIC. */
+       tdb_off_t reserved[27];
 };
 
 struct tdb_lock_type {
@@ -266,5 +268,8 @@ void tdb_io_init(struct tdb_context *tdb);
 int tdb_expand(struct tdb_context *tdb, tdb_off_t size);
 int tdb_rec_free_read(struct tdb_context *tdb, tdb_off_t off,
                      struct tdb_record *rec);
-
+bool tdb_write_all(int fd, const void *buf, size_t count);
 int tdb_transaction_recover(struct tdb_context *tdb);
+void tdb_header_hash(struct tdb_context *tdb,
+                    uint32_t *magic1_hash, uint32_t *magic2_hash);
+unsigned int tdb_old_hash(TDB_DATA *key);