s4-dsdb: Reduce calls to the ldb layer by reloading less often

We do not need to reload the partition list to get the global sequence
number, as that number is stored in the metadata.tdb, not the ldb files.

Andrew Bartlett

1 files changed, 20 insertions, 14 deletions

diff --git a/source4/dsdb/samdb/ldb_modules/partition.c b/source4/dsdb/samdb/ldb_modules/partition.c
index d4f020fc5e..3533810deb 100644
--- a/source4/dsdb/samdb/ldb_modules/partition.c
+++ b/source4/dsdb/samdb/ldb_modules/partition.c
@@ -1154,14 +1154,6 @@ static int partition_sequence_number(struct ldb_module *module, struct ldb_reque
 	struct dsdb_partition *p;
 	int ret;
 
-	p = find_partition(data, NULL, req);
-	if (p != NULL) {
-		/* the caller specified what partition they want the
-		 * sequence number operation on - just pass it on
-		 */
-		return ldb_next_request(p->module, req);
-	}
-
 	seq = talloc_get_type_abort(req->op.extended.data, struct ldb_seqnum_request);
 	switch (seq->type) {
 	case LDB_SEQ_NEXT:
@@ -1172,6 +1164,26 @@ static int partition_sequence_number(struct ldb_module *module, struct ldb_reque
 		break;
 
 	case LDB_SEQ_HIGHEST_SEQ:
+
+		/* 
+		 * We can only query per-partition the individual
+		 * partition sequence number, so we don't need to run
+		 * this reload for every query of the next global seq
+		 * number 
+		 */
+		ret = partition_reload_if_required(module, data, req);
+		if (ret != LDB_SUCCESS) {
+			return ret;
+		}
+		
+		p = find_partition(data, NULL, req);
+		if (p != NULL) {
+			/* the caller specified what partition they want the
+			 * sequence number operation on - just pass it on
+			 */
+			return ldb_next_request(p->module, req);
+		}
+
 		ret = partition_metadata_sequence_number(module, &seq_number);
 		if (ret != LDB_SUCCESS) {
 			return ret;
@@ -1221,12 +1233,6 @@ static int partition_extended(struct ldb_module *module, struct ldb_request *req
 		ret = partition_metadata_inc_schema_sequence(module);
 		return ldb_module_done(req, NULL, NULL, ret);
 	}
-
-	/* see if we are still up-to-date */
-	ret = partition_reload_if_required(module, data, req);
-	if (ret != LDB_SUCCESS) {
-		return ret;
-	}
 	
 	if (strcmp(req->op.extended.oid, LDB_EXTENDED_SEQUENCE_NUMBER) == 0) {
 		return partition_sequence_number(module, req);