ldb-tdb: Introduce a flag on ltdb_add_internal to indicate whether unique value test should be performed or not

The function ltdb_add_internal is called either from ltdb_add or
ltdb_rename. In case of add we enforce the unique test (unless it has
been relaxed by a upper module through the
LDB_FLAG_INTERNAL_DISABLE_SINGLE_VALUE_CHECK flag), but for rename as it
is translated by a delete + a add we relax the test as we can have one
or more attribute which are supposed to be single valued but that are
not (ie. when we have a couple of deleted value on a single valued
attribute), we have already done the tests on insert so make the
assumption that the values are OK.

Without this patch deleting a subnet that has been affected to more than
one site fails as the delete is in fact a rename to GUID\0DEL ... with
an attribute siteObject that has 1 active link value and 1 inactive link
value

Autobuild-User: Matthieu Patou <mat@samba.org>
Autobuild-Date: Wed Jul 13 02:29:20 CEST 2011 on sn-devel-104

1 files changed, 11 insertions, 4 deletions

diff --git a/lib/ldb/ldb_tdb/ldb_tdb.c b/lib/ldb/ldb_tdb/ldb_tdb.c
index 0d4be491235..d111e01118f 100644
--- a/lib/ldb/ldb_tdb/ldb_tdb.c
+++ b/lib/ldb/ldb_tdb/ldb_tdb.c
@@ -311,7 +311,8 @@ static bool ldb_tdb_single_valued(const struct ldb_schema_attribute *a,
 }
 
 static int ltdb_add_internal(struct ldb_module *module,
-			     const struct ldb_message *msg)
+			     const struct ldb_message *msg,
+			     bool check_single_value)
 {
 	struct ldb_context *ldb = ldb_module_get_ctx(module);
 	int ret = LDB_SUCCESS;
@@ -326,7 +327,9 @@ static int ltdb_add_internal(struct ldb_module *module,
 					       el->name, ldb_dn_get_linearized(msg->dn));
 			return LDB_ERR_CONSTRAINT_VIOLATION;
 		}
-		if (el->num_values > 1 && ldb_tdb_single_valued(a, el)) {
+		if (check_single_value &&
+				el->num_values > 1 &&
+				ldb_tdb_single_valued(a, el)) {
 			ldb_asprintf_errstring(ldb, "SINGLE-VALUE attribute %s on %s specified more than once",
 					       el->name, ldb_dn_get_linearized(msg->dn));
 			return LDB_ERR_CONSTRAINT_VIOLATION;
@@ -373,7 +376,7 @@ static int ltdb_add(struct ltdb_context *ctx)
 		return LDB_ERR_OPERATIONS_ERROR;
 	}
 
-	ret = ltdb_add_internal(module, req->op.add.message);
+	ret = ltdb_add_internal(module, req->op.add.message, true);
 
 	return ret;
 }
@@ -998,7 +1001,11 @@ static int ltdb_rename(struct ltdb_context *ctx)
 		return LDB_ERR_OPERATIONS_ERROR;
 	}
 
-	ret = ltdb_add_internal(module, msg);
+	/* We don't check single value as we can have more than 1 with
+	 * deleted attributes. We could go through all elements but that's
+	 * maybe not the most efficient way
+	 */
+	ret = ltdb_add_internal(module, msg, false);
 
 	return ret;
 }