ITS#7473 check DN scope before fetching id2e

This is only a 10% gain, but still worth having for now.

servers/slapd/back-mdb/dn2id.c

@@ -616,7 +616,7 @@ mdb_idscopes(
 			key.mv_data = &id;
 			rc = mdb_cursor_get( isc->mc, &key, &data, MDB_SET );
 			if ( rc )
-				break;
+				return rc;
 
 			/* save RDN info */
 		}
@@ -649,5 +649,5 @@ mdb_idscopes(
 		if ( op->ors_scope == LDAP_SCOPE_ONELEVEL )
 			break;
 	}
-	return MDB_NOTFOUND;
+	return MDB_SUCCESS;
 }

servers/slapd/back-mdb/search.c

@@ -634,42 +634,6 @@ loop_begin:
 			goto done;
 		}
 
-		if ( id == base->e_id ) {
-			e = base;
-		} else {
-
-			/* get the entry */
-			rs->sr_err = mdb_id2edata( op, mci, id, &edata );
-			if ( rs->sr_err == MDB_NOTFOUND ) {
-				if( !MDB_IDL_IS_RANGE(candidates) ) {
-					/* only complain for non-range IDLs */
-					Debug( LDAP_DEBUG_TRACE,
-						LDAP_XSTRING(mdb_search)
-						": candidate %ld not found\n",
-						(long) id, 0, 0 );
-				} else {
-					/* get the next ID from the DB */
-					rs->sr_err = mdb_get_nextid( mci, &cursor );
-					if ( rs->sr_err == MDB_NOTFOUND ) {
-						break;
-					}
-					if ( rs->sr_err ) {
-						rs->sr_err = LDAP_OTHER;
-						rs->sr_text = "internal error in get_nextid";
-						send_ldap_result( op, rs );
-						goto done;
-					}
-					cursor--;
-				}
-
-				goto loop_continue;
-			} else if ( rs->sr_err ) {
-				rs->sr_err = LDAP_OTHER;
-				rs->sr_text = "internal error in mdb_id2edata";
-				send_ldap_result( op, rs );
-				goto done;
-			}
-		}
 
 		/* Does this candidate actually satisfy the search scope?
 		 */
@@ -694,7 +658,15 @@ loop_begin:
 			/* Fall-thru */
 		case LDAP_SCOPE_ONELEVEL:
 			isc.id = id;
-			if ( mdb_idscopes( op, &isc ) == MDB_SUCCESS ) scopeok = 1;
+			isc.nscope = 0;
+			rs->sr_err = mdb_idscopes( op, &isc );
+			if ( rs->sr_err == MDB_SUCCESS ) {
+				if ( isc.nscope )
+					scopeok = 1;
+			} else {
+				if ( rs->sr_err == MDB_NOTFOUND )
+					goto notfound;
+			}
 			break;
 		}
 
@@ -708,7 +680,43 @@ loop_begin:
 			goto loop_continue;
 		}
 
-		if ( id != base->e_id ) {
+		if ( id == base->e_id ) {
+			e = base;
+		} else {
+
+			/* get the entry */
+			rs->sr_err = mdb_id2edata( op, mci, id, &edata );
+			if ( rs->sr_err == MDB_NOTFOUND ) {
+notfound:
+				if( !MDB_IDL_IS_RANGE(candidates) ) {
+					/* only complain for non-range IDLs */
+					Debug( LDAP_DEBUG_TRACE,
+						LDAP_XSTRING(mdb_search)
+						": candidate %ld not found\n",
+						(long) id, 0, 0 );
+				} else {
+					/* get the next ID from the DB */
+					rs->sr_err = mdb_get_nextid( mci, &cursor );
+					if ( rs->sr_err == MDB_NOTFOUND ) {
+						break;
+					}
+					if ( rs->sr_err ) {
+						rs->sr_err = LDAP_OTHER;
+						rs->sr_text = "internal error in get_nextid";
+						send_ldap_result( op, rs );
+						goto done;
+					}
+					cursor--;
+				}
+
+				goto loop_continue;
+			} else if ( rs->sr_err ) {
+				rs->sr_err = LDAP_OTHER;
+				rs->sr_text = "internal error in mdb_id2edata";
+				send_ldap_result( op, rs );
+				goto done;
+			}
+
 			rs->sr_err = mdb_entry_decode( op, &edata, &e );
 			if ( rs->sr_err ) {
 				rs->sr_err = LDAP_OTHER;