From ce6243f0099b283bc298dad807be38e53020e274 Mon Sep 17 00:00:00 2001
From: Howard Chu <hyc@openldap.org>
Date: Fri, 19 Oct 2001 20:28:48 +0000
Subject: [PATCH] Patches for modify/modrdn to work with BDB_USE_BINARY_RW.

---
 servers/slapd/back-bdb/id2entry.c | 15 +++++++++++++--
 servers/slapd/back-bdb/modify.c   |  3 +++
 servers/slapd/back-bdb/modrdn.c   |  9 +++++++++
 3 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/servers/slapd/back-bdb/id2entry.c b/servers/slapd/back-bdb/id2entry.c
index 688cdc4e9d..538249eb34 100644
--- a/servers/slapd/back-bdb/id2entry.c
+++ b/servers/slapd/back-bdb/id2entry.c
@@ -156,7 +156,11 @@ int bdb_encode(Entry *e, struct berval **bv)
 /* Retrieve an Entry that was stored using bdb_encode above.
  * All we have to do is add the buffer address to all of the
  * stored offsets. We also use the stored attribute names to
- * pull AttributeDescriptions from our ad_cache.
+ * pull AttributeDescriptions from our ad_cache. To detect if
+ * the attributes of an Entry are later modified, we also store
+ * the address of the end of this block in e_private. Since
+ * modify_internal always allocs a new list of attrs to work
+ * with, we need to free that separately.
  */
 int bdb_decode(struct berval *bv, Entry **e)
 {
@@ -192,7 +196,6 @@ int bdb_decode(struct berval *bv, Entry **e)
 
 #define	entry_encode(a, b)	bdb_encode(a,b)
 #define	entry_decode(a, b)	bdb_decode(a,b)
-#define	entry_free(e)	ch_free(e)
 
 #endif	/* BDB_USE_BINARY_RW */
 
@@ -321,6 +324,14 @@ int bdb_entry_return(
 	BackendDB *be,
 	Entry *e )
 {
+#ifdef BDB_USE_BINARY_RW
+	/* bdb_modify_internal always operates on a dup'd set of attrs. */
+	if ((void *)e->e_attrs < (void *)e  ||
+		(void *)e->e_attrs > e->e_private)
+	    attrs_free(e->e_attrs);
+	ch_free(e);
+#else
 	entry_free( e );
+#endif
 	return 0;
 }
diff --git a/servers/slapd/back-bdb/modify.c b/servers/slapd/back-bdb/modify.c
index 4076ff48d3..279a8776a1 100644
--- a/servers/slapd/back-bdb/modify.c
+++ b/servers/slapd/back-bdb/modify.c
@@ -147,7 +147,10 @@ int bdb_modify_internal(
 		return rc;
 	}
 
+#ifndef BDB_USE_BINARY_RW
+	/* cannot free individual elements of the entry */
 	attrs_free( save_attrs );
+#endif
 	return rc;
 }
 
diff --git a/servers/slapd/back-bdb/modrdn.c b/servers/slapd/back-bdb/modrdn.c
index 24522e17e1..3da231e231 100644
--- a/servers/slapd/back-bdb/modrdn.c
+++ b/servers/slapd/back-bdb/modrdn.c
@@ -480,12 +480,21 @@ retry:	/* transaction retry */
 		goto return_results;
 	}
 
+#ifdef BDB_USE_BINARY_RW
+	/* Binary format uses a single contiguous block, cannot
+	 * free individual fields. Leave new_dn/new_ndn set so
+	 * they can be individually freed later.
+	 */
+	e->e_dn = new_dn;
+	e->e_ndn = new_ndn;
+#else
 	free( e->e_dn );
 	free( e->e_ndn );
 	e->e_dn = new_dn;
 	e->e_ndn = new_ndn;
 	new_dn = NULL;
 	new_ndn = NULL;
+#endif
 
 	/* add new one */
 	rc = bdb_dn2id_add( be, ltid, e->e_ndn, e->e_id );
-- 
2.39.5