X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftdb2%2Ftdb2.h;h=c91ca7cad08613d53e1bfa3f317f6197eea3db30;hp=d5ae329a6029d7659886992dd380e845bd9d2fb4;hb=c8c3b3568677e8b0105f84e4ab068c580faf4591;hpb=1a0c636bc38213bd0322db47529f78f2dc22ffdd

diff --git a/ccan/tdb2/tdb2.h b/ccan/tdb2/tdb2.h
index d5ae329a..c91ca7ca 100644
--- a/ccan/tdb2/tdb2.h
+++ b/ccan/tdb2/tdb2.h
@@ -86,6 +86,7 @@ struct tdb_context *tdb_open(const char *name, int tdb_flags,
 #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.
@@ -606,7 +607,8 @@ enum tdb_attribute_type {
 	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,
 };
 
 /**
@@ -630,8 +632,9 @@ enum TDB_ERROR tdb_get_attribute(struct tdb_context *tdb,
  * 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);
@@ -837,6 +840,19 @@ struct tdb_attribute_flock {
 	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;
+};
+
 /**
  * union tdb_attribute - tdb attributes.
  *
@@ -855,6 +871,7 @@ union tdb_attribute {
 	struct tdb_attribute_stats stats;
 	struct tdb_attribute_openhook openhook;
 	struct tdb_attribute_flock flock;
+	struct tdb_attribute_tdb1_hashsize tdb1_hashsize;
 };
 
 #ifdef  __cplusplus