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authorAndrew Bartlett <abartlet@samba.org>2013-05-31 14:16:02 +1000
committerStefan Metzmacher <metze@samba.org>2013-06-12 10:02:08 +0200
commit96980f7c04cc4226ed109654025b8254921f8d58 (patch)
tree6c1ff8d9e21bbd25b6b2fd34bcbd5c4c85fe807b /source4
parente461ff530046199b7e647b81d6dfb2746f68b0d7 (diff)
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dsdb: Fix behaviour for when to update the USN when there is no change
This handles deletions and replacements with no value, or with an exactly specified value, as well as modifies. Pair-Programmed-With: Stefan Metzmacher <metze@samba.org> Andrew Bartlett Signed-off-by: Stefan Metzmacher <metze@samba.org>
Diffstat (limited to 'source4')
-rw-r--r--source4/dsdb/samdb/ldb_modules/repl_meta_data.c34
1 files changed, 28 insertions, 6 deletions
diff --git a/source4/dsdb/samdb/ldb_modules/repl_meta_data.c b/source4/dsdb/samdb/ldb_modules/repl_meta_data.c
index 24dcc6f04d..0f2aa58635 100644
--- a/source4/dsdb/samdb/ldb_modules/repl_meta_data.c
+++ b/source4/dsdb/samdb/ldb_modules/repl_meta_data.c
@@ -1086,6 +1086,7 @@ static int replmd_update_rpmd_element(struct ldb_context *ldb,
uint32_t i;
const struct dsdb_attribute *a;
struct replPropertyMetaData1 *md1;
+ bool may_skip = false;
a = dsdb_attribute_by_lDAPDisplayName(schema, el->name);
if (a == NULL) {
@@ -1104,13 +1105,34 @@ static int replmd_update_rpmd_element(struct ldb_context *ldb,
return LDB_SUCCESS;
}
- /* if the attribute's value haven't changed then return LDB_SUCCESS
- * Unless we have the provision control or if the attribute is
- * interSiteTopologyGenerator as this page explain: http://support.microsoft.com/kb/224815
- * this attribute is periodicaly written by the DC responsible for the intersite generation
- * in a given site
+ /*
+ * if the attribute's value haven't changed, and this isn't
+ * just a delete of everything then return LDB_SUCCESS Unless
+ * we have the provision control or if the attribute is
+ * interSiteTopologyGenerator as this page explain:
+ * http://support.microsoft.com/kb/224815 this attribute is
+ * periodicaly written by the DC responsible for the intersite
+ * generation in a given site
+ *
+ * Unchanged could be deleting or replacing an already-gone
+ * thing with an unconstrained delete/empty replace or a
+ * replace with the same value, but not an add with the same
+ * value because that could be about adding a duplicate (which
+ * is for someone else to error out on).
*/
- if (old_el != NULL && ldb_msg_element_compare(el, old_el) == 0) {
+ if (old_el != NULL && ldb_msg_element_equal_ordered(el, old_el)) {
+ if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) {
+ may_skip = true;
+ }
+ } else if (old_el == NULL && el->num_values == 0) {
+ if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) {
+ may_skip = true;
+ } else if (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE) {
+ may_skip = true;
+ }
+ }
+
+ if (may_skip) {
if (strcmp(el->name, "interSiteTopologyGenerator") != 0 &&
!ldb_request_get_control(req, LDB_CONTROL_PROVISION_OID)) {
/*