Don't get blacklisted hosts when querying joined servers (#2880)

Otherwise we just waste time/CPU.

federationapi/api/api.go

@@ -200,6 +200,7 @@ type PerformInviteResponse struct {
 type QueryJoinedHostServerNamesInRoomRequest struct {
 	RoomID             string `json:"room_id"`
 	ExcludeSelf        bool   `json:"exclude_self"`
+	ExcludeBlacklisted bool   `json:"exclude_blacklisted"`
 }
 
 // QueryJoinedHostServerNamesInRoomResponse is a response to QueryJoinedHostServerNames

federationapi/consumers/keychange.go

@@ -128,7 +128,7 @@ func (t *KeyChangeConsumer) onDeviceKeyMessage(m api.DeviceMessage) bool {
 	}
 
 	// send this key change to all servers who share rooms with this user.
-	destinations, err := t.db.GetJoinedHostsForRooms(t.ctx, queryRes.RoomIDs, true)
+	destinations, err := t.db.GetJoinedHostsForRooms(t.ctx, queryRes.RoomIDs, true, true)
 	if err != nil {
 		sentry.CaptureException(err)
 		logger.WithError(err).Error("failed to calculate joined hosts for rooms user is in")
@@ -189,7 +189,7 @@ func (t *KeyChangeConsumer) onCrossSigningMessage(m api.DeviceMessage) bool {
 		return true
 	}
 	// send this key change to all servers who share rooms with this user.
-	destinations, err := t.db.GetJoinedHostsForRooms(t.ctx, queryRes.RoomIDs, true)
+	destinations, err := t.db.GetJoinedHostsForRooms(t.ctx, queryRes.RoomIDs, true, true)
 	if err != nil {
 		sentry.CaptureException(err)
 		logger.WithError(err).Error("fedsender key change consumer: failed to calculate joined hosts for rooms user is in")

federationapi/consumers/presence.go

@@ -111,7 +111,7 @@ func (t *OutputPresenceConsumer) onMessage(ctx context.Context, msgs []*nats.Msg
 	}
 
 	// send this presence to all servers who share rooms with this user.
-	joined, err := t.db.GetJoinedHostsForRooms(t.ctx, queryRes.RoomIDs, true)
+	joined, err := t.db.GetJoinedHostsForRooms(t.ctx, queryRes.RoomIDs, true, true)
 	if err != nil {
 		log.WithError(err).Error("failed to get joined hosts")
 		return true

federationapi/internal/query.go

@@ -16,7 +16,7 @@ func (f *FederationInternalAPI) QueryJoinedHostServerNamesInRoom(
 	request *api.QueryJoinedHostServerNamesInRoomRequest,
 	response *api.QueryJoinedHostServerNamesInRoomResponse,
 ) (err error) {
-	joinedHosts, err := f.db.GetJoinedHostsForRooms(ctx, []string{request.RoomID}, request.ExcludeSelf)
+	joinedHosts, err := f.db.GetJoinedHostsForRooms(ctx, []string{request.RoomID}, request.ExcludeSelf, request.ExcludeBlacklisted)
 	if err != nil {
 		return
 	}

federationapi/storage/interface.go

@@ -32,7 +32,7 @@ type Database interface {
 	GetJoinedHosts(ctx context.Context, roomID string) ([]types.JoinedHost, error)
 	GetAllJoinedHosts(ctx context.Context) ([]gomatrixserverlib.ServerName, error)
 	// GetJoinedHostsForRooms returns the complete set of servers in the rooms given.
-	GetJoinedHostsForRooms(ctx context.Context, roomIDs []string, excludeSelf bool) ([]gomatrixserverlib.ServerName, error)
+	GetJoinedHostsForRooms(ctx context.Context, roomIDs []string, excludeSelf, excludeBlacklisted bool) ([]gomatrixserverlib.ServerName, error)
 
 	StoreJSON(ctx context.Context, js string) (*shared.Receipt, error)
 

federationapi/storage/postgres/joined_hosts_table.go

@@ -66,6 +66,11 @@ const selectAllJoinedHostsSQL = "" +
 const selectJoinedHostsForRoomsSQL = "" +
 	"SELECT DISTINCT server_name FROM federationsender_joined_hosts WHERE room_id = ANY($1)"
 
+const selectJoinedHostsForRoomsExcludingBlacklistedSQL = "" +
+	"SELECT DISTINCT server_name FROM federationsender_joined_hosts j WHERE room_id = ANY($1) AND NOT EXISTS (" +
+	"  SELECT server_name FROM federationsender_blacklist WHERE j.server_name = server_name" +
+	");"
+
 type joinedHostsStatements struct {
 	db                                                *sql.DB
 	insertJoinedHostsStmt                             *sql.Stmt
@@ -74,6 +79,7 @@ type joinedHostsStatements struct {
 	selectJoinedHostsStmt                             *sql.Stmt
 	selectAllJoinedHostsStmt                          *sql.Stmt
 	selectJoinedHostsForRoomsStmt                     *sql.Stmt
+	selectJoinedHostsForRoomsExcludingBlacklistedStmt *sql.Stmt
 }
 
 func NewPostgresJoinedHostsTable(db *sql.DB) (s *joinedHostsStatements, err error) {
@@ -102,6 +108,9 @@ func NewPostgresJoinedHostsTable(db *sql.DB) (s *joinedHostsStatements, err erro
 	if s.selectJoinedHostsForRoomsStmt, err = s.db.Prepare(selectJoinedHostsForRoomsSQL); err != nil {
 		return
 	}
+	if s.selectJoinedHostsForRoomsExcludingBlacklistedStmt, err = s.db.Prepare(selectJoinedHostsForRoomsExcludingBlacklistedSQL); err != nil {
+		return
+	}
 	return
 }
 
@@ -167,9 +176,13 @@ func (s *joinedHostsStatements) SelectAllJoinedHosts(
 }
 
 func (s *joinedHostsStatements) SelectJoinedHostsForRooms(
-	ctx context.Context, roomIDs []string,
+	ctx context.Context, roomIDs []string, excludingBlacklisted bool,
 ) ([]gomatrixserverlib.ServerName, error) {
-	rows, err := s.selectJoinedHostsForRoomsStmt.QueryContext(ctx, pq.StringArray(roomIDs))
+	stmt := s.selectJoinedHostsForRoomsStmt
+	if excludingBlacklisted {
+		stmt = s.selectJoinedHostsForRoomsExcludingBlacklistedStmt
+	}
+	rows, err := stmt.QueryContext(ctx, pq.StringArray(roomIDs))
 	if err != nil {
 		return nil, err
 	}

federationapi/storage/postgres/storage.go

@@ -42,6 +42,10 @@ func NewDatabase(base *base.BaseDendrite, dbProperties *config.DatabaseOptions,
 	if d.db, d.writer, err = base.DatabaseConnection(dbProperties, sqlutil.NewDummyWriter()); err != nil {
 		return nil, err
 	}
+	blacklist, err := NewPostgresBlacklistTable(d.db)
+	if err != nil {
+		return nil, err
+	}
 	joinedHosts, err := NewPostgresJoinedHostsTable(d.db)
 	if err != nil {
 		return nil, err
@@ -58,10 +62,6 @@ func NewDatabase(base *base.BaseDendrite, dbProperties *config.DatabaseOptions,
 	if err != nil {
 		return nil, err
 	}
-	blacklist, err := NewPostgresBlacklistTable(d.db)
-	if err != nil {
-		return nil, err
-	}
 	inboundPeeks, err := NewPostgresInboundPeeksTable(d.db)
 	if err != nil {
 		return nil, err

federationapi/storage/shared/storage.go

@@ -117,8 +117,8 @@ func (d *Database) GetAllJoinedHosts(ctx context.Context) ([]gomatrixserverlib.S
 	return d.FederationJoinedHosts.SelectAllJoinedHosts(ctx)
 }
 
-func (d *Database) GetJoinedHostsForRooms(ctx context.Context, roomIDs []string, excludeSelf bool) ([]gomatrixserverlib.ServerName, error) {
+func (d *Database) GetJoinedHostsForRooms(ctx context.Context, roomIDs []string, excludeSelf, excludeBlacklisted bool) ([]gomatrixserverlib.ServerName, error) {
-	servers, err := d.FederationJoinedHosts.SelectJoinedHostsForRooms(ctx, roomIDs)
+	servers, err := d.FederationJoinedHosts.SelectJoinedHostsForRooms(ctx, roomIDs, excludeBlacklisted)
 	if err != nil {
 		return nil, err
 	}

federationapi/storage/sqlite3/joined_hosts_table.go

@@ -66,6 +66,11 @@ const selectAllJoinedHostsSQL = "" +
 const selectJoinedHostsForRoomsSQL = "" +
 	"SELECT DISTINCT server_name FROM federationsender_joined_hosts WHERE room_id IN ($1)"
 
+const selectJoinedHostsForRoomsExcludingBlacklistedSQL = "" +
+	"SELECT DISTINCT server_name FROM federationsender_joined_hosts j WHERE room_id IN ($1) AND NOT EXISTS (" +
+	"  SELECT server_name FROM federationsender_blacklist WHERE j.server_name = server_name" +
+	");"
+
 type joinedHostsStatements struct {
 	db                           *sql.DB
 	insertJoinedHostsStmt        *sql.Stmt
@@ -74,6 +79,7 @@ type joinedHostsStatements struct {
 	selectJoinedHostsStmt        *sql.Stmt
 	selectAllJoinedHostsStmt     *sql.Stmt
 	// selectJoinedHostsForRoomsStmt *sql.Stmt - prepared at runtime due to variadic
+	// selectJoinedHostsForRoomsExcludingBlacklistedStmt *sql.Stmt - prepared at runtime due to variadic
 }
 
 func NewSQLiteJoinedHostsTable(db *sql.DB) (s *joinedHostsStatements, err error) {
@@ -168,14 +174,17 @@ func (s *joinedHostsStatements) SelectAllJoinedHosts(
 }
 
 func (s *joinedHostsStatements) SelectJoinedHostsForRooms(
-	ctx context.Context, roomIDs []string,
+	ctx context.Context, roomIDs []string, excludingBlacklisted bool,
 ) ([]gomatrixserverlib.ServerName, error) {
 	iRoomIDs := make([]interface{}, len(roomIDs))
 	for i := range roomIDs {
 		iRoomIDs[i] = roomIDs[i]
 	}
-
+	query := selectJoinedHostsForRoomsSQL
-	sql := strings.Replace(selectJoinedHostsForRoomsSQL, "($1)", sqlutil.QueryVariadic(len(iRoomIDs)), 1)
+	if excludingBlacklisted {
+		query = selectJoinedHostsForRoomsExcludingBlacklistedSQL
+	}
+	sql := strings.Replace(query, "($1)", sqlutil.QueryVariadic(len(iRoomIDs)), 1)
 	rows, err := s.db.QueryContext(ctx, sql, iRoomIDs...)
 	if err != nil {
 		return nil, err

federationapi/storage/sqlite3/storage.go

@@ -41,6 +41,10 @@ func NewDatabase(base *base.BaseDendrite, dbProperties *config.DatabaseOptions,
 	if d.db, d.writer, err = base.DatabaseConnection(dbProperties, sqlutil.NewExclusiveWriter()); err != nil {
 		return nil, err
 	}
+	blacklist, err := NewSQLiteBlacklistTable(d.db)
+	if err != nil {
+		return nil, err
+	}
 	joinedHosts, err := NewSQLiteJoinedHostsTable(d.db)
 	if err != nil {
 		return nil, err
@@ -57,10 +61,6 @@ func NewDatabase(base *base.BaseDendrite, dbProperties *config.DatabaseOptions,
 	if err != nil {
 		return nil, err
 	}
-	blacklist, err := NewSQLiteBlacklistTable(d.db)
-	if err != nil {
-		return nil, err
-	}
 	outboundPeeks, err := NewSQLiteOutboundPeeksTable(d.db)
 	if err != nil {
 		return nil, err

federationapi/storage/tables/interface.go

@@ -58,7 +58,7 @@ type FederationJoinedHosts interface {
 	SelectJoinedHostsWithTx(ctx context.Context, txn *sql.Tx, roomID string) ([]types.JoinedHost, error)
 	SelectJoinedHosts(ctx context.Context, roomID string) ([]types.JoinedHost, error)
 	SelectAllJoinedHosts(ctx context.Context) ([]gomatrixserverlib.ServerName, error)
-	SelectJoinedHostsForRooms(ctx context.Context, roomIDs []string) ([]gomatrixserverlib.ServerName, error)
+	SelectJoinedHostsForRooms(ctx context.Context, roomIDs []string, excludingBlacklisted bool) ([]gomatrixserverlib.ServerName, error)
 }
 
 type FederationBlacklist interface {

roomserver/internal/input/input_events.go

@@ -167,6 +167,7 @@ func (r *Inputer) processRoomEvent(
 		serverReq := &fedapi.QueryJoinedHostServerNamesInRoomRequest{
 			RoomID:             event.RoomID(),
 			ExcludeSelf:        true,
+			ExcludeBlacklisted: true,
 		}
 		if err = r.FSAPI.QueryJoinedHostServerNamesInRoom(ctx, serverReq, serverRes); err != nil {
 			return fmt.Errorf("r.FSAPI.QueryJoinedHostServerNamesInRoom: %w", err)