From c2e5e9e67c24264f5a12bf3ceaa9c4e195547d26 Mon Sep 17 00:00:00 2001 From: Eric Eastwood Date: Thu, 19 Sep 2024 10:07:18 -0500 Subject: [PATCH] Sliding Sync: Avoid fetching left rooms and add back `newly_left` rooms (#17725) Performance optimization: We can avoid fetching rooms that the user has left themselves (which could be a significant amount), then only add back rooms that the user has `newly_left` (left in the token range of an incremental sync). It's a lot faster to fetch less rooms than fetch them all and throw them away in most cases. Since the user only leaves a room (or is state reset out) once in a blue moon, we can avoid a lot of work. Based on @erikjohnston's branch, erikj/ss_perf --------- Co-authored-by: Erik Johnston --- changelog.d/17725.misc | 1 + synapse/handlers/sliding_sync/__init__.py | 26 +- synapse/handlers/sliding_sync/room_lists.py | 279 ++++++---- synapse/storage/databases/main/roommember.py | 46 +- synapse/storage/databases/main/state.py | 20 +- synapse/storage/databases/main/stream.py | 7 + .../client/sliding_sync/test_sliding_sync.py | 479 +++++++++++++++++- tests/storage/test_stream.py | 85 +++- 8 files changed, 833 insertions(+), 110 deletions(-) create mode 100644 changelog.d/17725.misc diff --git a/changelog.d/17725.misc b/changelog.d/17725.misc new file mode 100644 index 0000000000..2a53bb1491 --- /dev/null +++ b/changelog.d/17725.misc @@ -0,0 +1 @@ +More efficiently fetch rooms for Sliding Sync. diff --git a/synapse/handlers/sliding_sync/__init__.py b/synapse/handlers/sliding_sync/__init__.py index 4010f28607..5206af22ec 100644 --- a/synapse/handlers/sliding_sync/__init__.py +++ b/synapse/handlers/sliding_sync/__init__.py @@ -495,6 +495,24 @@ class SlidingSyncHandler: room_sync_config.timeline_limit, ) + # Handle state resets. For example, if we see + # `room_membership_for_user_at_to_token.event_id=None and + # room_membership_for_user_at_to_token.membership is not None`, we should + # indicate to the client that a state reset happened. Perhaps we should indicate + # this by setting `initial: True` and empty `required_state: []`. + state_reset_out_of_room = False + if ( + room_membership_for_user_at_to_token.event_id is None + and room_membership_for_user_at_to_token.membership is not None + ): + # We only expect the `event_id` to be `None` if you've been state reset out + # of the room (meaning you're no longer in the room). We could put this as + # part of the if-statement above but we want to handle every case where + # `event_id` is `None`. + assert room_membership_for_user_at_to_token.membership is Membership.LEAVE + + state_reset_out_of_room = True + # Determine whether we should limit the timeline to the token range. # # We should return historical messages (before token range) in the @@ -527,7 +545,7 @@ class SlidingSyncHandler: from_bound = None initial = True ignore_timeline_bound = False - if from_token and not newly_joined: + if from_token and not newly_joined and not state_reset_out_of_room: room_status = previous_connection_state.rooms.have_sent_room(room_id) if room_status.status == HaveSentRoomFlag.LIVE: from_bound = from_token.stream_token.room_key @@ -732,12 +750,6 @@ class SlidingSyncHandler: stripped_state.append(strip_event(invite_or_knock_event)) - # TODO: Handle state resets. For example, if we see - # `room_membership_for_user_at_to_token.event_id=None and - # room_membership_for_user_at_to_token.membership is not None`, we should - # indicate to the client that a state reset happened. Perhaps we should indicate - # this by setting `initial: True` and empty `required_state`. - # Get the changes to current state in the token range from the # `current_state_delta_stream` table. # diff --git a/synapse/handlers/sliding_sync/room_lists.py b/synapse/handlers/sliding_sync/room_lists.py index 353c491f72..bf19eb735b 100644 --- a/synapse/handlers/sliding_sync/room_lists.py +++ b/synapse/handlers/sliding_sync/room_lists.py @@ -56,7 +56,6 @@ from synapse.storage.roommember import ( ) from synapse.types import ( MutableStateMap, - PersistedEventPosition, RoomStreamToken, StateMap, StrCollection, @@ -81,6 +80,12 @@ if TYPE_CHECKING: logger = logging.getLogger(__name__) +class Sentinel(enum.Enum): + # defining a sentinel in this way allows mypy to correctly handle the + # type of a dictionary lookup and subsequent type narrowing. + UNSET_SENTINEL = object() + + # Helper definition for the types that we might return. We do this to avoid # copying data between types (which can be expensive for many rooms). RoomsForUserType = Union[RoomsForUserStateReset, RoomsForUser, RoomsForUserSlidingSync] @@ -119,12 +124,6 @@ class SlidingSyncInterestedRooms: dm_room_ids: AbstractSet[str] -class Sentinel(enum.Enum): - # defining a sentinel in this way allows mypy to correctly handle the - # type of a dictionary lookup and subsequent type narrowing. - UNSET_SENTINEL = object() - - def filter_membership_for_sync( *, user_id: str, @@ -221,6 +220,9 @@ class SlidingSyncRoomLists: # include rooms that are outside the list ranges. all_rooms: Set[str] = set() + # Note: this won't include rooms the user has left themselves. We add back + # `newly_left` rooms below. This is more efficient than fetching all rooms and + # then filtering out the old left rooms. room_membership_for_user_map = await self.store.get_sliding_sync_rooms_for_user( user_id ) @@ -262,36 +264,11 @@ class SlidingSyncRoomLists: event_id=change.event_id, event_pos=change.event_pos, room_version_id=change.room_version_id, - # We keep the current state of the room though + # We keep the state of the room though has_known_state=existing_room.has_known_state, room_type=existing_room.room_type, is_encrypted=existing_room.is_encrypted, ) - else: - # This can happen if we get "state reset" out of the room - # after the `to_token`. In other words, there is no membership - # for the room after the `to_token` but we see membership in - # the token range. - - # Get the state at the time. Note that room type never changes, - # so we can just get current room type - room_type = await self.store.get_room_type(room_id) - is_encrypted = await self.get_is_encrypted_for_room_at_token( - room_id, to_token.room_key - ) - - # Add back rooms that the user was state-reset out of after `to_token` - room_membership_for_user_map[room_id] = RoomsForUserSlidingSync( - room_id=room_id, - sender=change.sender, - membership=change.membership, - event_id=change.event_id, - event_pos=change.event_pos, - room_version_id=change.room_version_id, - has_known_state=True, - room_type=room_type, - is_encrypted=is_encrypted, - ) ( newly_joined_room_ids, @@ -301,44 +278,88 @@ class SlidingSyncRoomLists: ) dm_room_ids = await self._get_dm_rooms_for_user(user_id) - # Handle state resets in the from -> to token range. - state_reset_rooms = ( + # Add back `newly_left` rooms (rooms left in the from -> to token range). + # + # We do this because `get_sliding_sync_rooms_for_user(...)` doesn't include + # rooms that the user left themselves as it's more efficient to add them back + # here than to fetch all rooms and then filter out the old left rooms. The user + # only leaves a room once in a blue moon so this barely needs to run. + # + missing_newly_left_rooms = ( newly_left_room_map.keys() - room_membership_for_user_map.keys() ) - if state_reset_rooms: + if missing_newly_left_rooms: + # TODO: It would be nice to avoid these copies room_membership_for_user_map = dict(room_membership_for_user_map) - for room_id in ( - newly_left_room_map.keys() - room_membership_for_user_map.keys() - ): - # Get the state at the time. Note that room type never changes, - # so we can just get current room type - room_type = await self.store.get_room_type(room_id) - is_encrypted = await self.get_is_encrypted_for_room_at_token( - room_id, newly_left_room_map[room_id].to_room_stream_token() - ) + for room_id in missing_newly_left_rooms: + newly_left_room_for_user = newly_left_room_map[room_id] + # This should be a given + assert newly_left_room_for_user.membership == Membership.LEAVE - room_membership_for_user_map[room_id] = RoomsForUserSlidingSync( - room_id=room_id, - sender=None, - membership=Membership.LEAVE, - event_id=None, - event_pos=newly_left_room_map[room_id], - room_version_id=await self.store.get_room_version_id(room_id), - has_known_state=True, - room_type=room_type, - is_encrypted=is_encrypted, + # Add back `newly_left` rooms + # + # Check for membership and state in the Sliding Sync tables as it's just + # another membership + newly_left_room_for_user_sliding_sync = ( + await self.store.get_sliding_sync_room_for_user(user_id, room_id) ) + # If the membership exists, it's just a normal user left the room on + # their own + if newly_left_room_for_user_sliding_sync is not None: + room_membership_for_user_map[room_id] = ( + newly_left_room_for_user_sliding_sync + ) + + change = changes.get(room_id) + if change is not None: + # Update room membership events to the point in time of the `to_token` + room_membership_for_user_map[room_id] = RoomsForUserSlidingSync( + room_id=room_id, + sender=change.sender, + membership=change.membership, + event_id=change.event_id, + event_pos=change.event_pos, + room_version_id=change.room_version_id, + # We keep the state of the room though + has_known_state=newly_left_room_for_user_sliding_sync.has_known_state, + room_type=newly_left_room_for_user_sliding_sync.room_type, + is_encrypted=newly_left_room_for_user_sliding_sync.is_encrypted, + ) + + # If we are `newly_left` from the room but can't find any membership, + # then we have been "state reset" out of the room + else: + # Get the state at the time. We can't read from the Sliding Sync + # tables because the user has no membership in the room according to + # the state (thanks to the state reset). + # + # Note: `room_type` never changes, so we can just get current room + # type + room_type = await self.store.get_room_type(room_id) + has_known_state = room_type is not ROOM_UNKNOWN_SENTINEL + if isinstance(room_type, StateSentinel): + room_type = None + + # Get the encryption status at the time of the token + is_encrypted = await self.get_is_encrypted_for_room_at_token( + room_id, + newly_left_room_for_user.event_pos.to_room_stream_token(), + ) + + room_membership_for_user_map[room_id] = RoomsForUserSlidingSync( + room_id=room_id, + sender=newly_left_room_for_user.sender, + membership=newly_left_room_for_user.membership, + event_id=newly_left_room_for_user.event_id, + event_pos=newly_left_room_for_user.event_pos, + room_version_id=newly_left_room_for_user.room_version_id, + has_known_state=has_known_state, + room_type=room_type, + is_encrypted=is_encrypted, + ) if sync_config.lists: - sync_room_map = { - room_id: room_membership_for_user - for room_id, room_membership_for_user in room_membership_for_user_map.items() - if filter_membership_for_sync( - user_id=user_id, - room_membership_for_user=room_membership_for_user, - newly_left=room_id in newly_left_room_map, - ) - } + sync_room_map = room_membership_for_user_map with start_active_span("assemble_sliding_window_lists"): for list_key, list_config in sync_config.lists.items(): # Apply filters @@ -347,6 +368,7 @@ class SlidingSyncRoomLists: filtered_sync_room_map = await self.filter_rooms_using_tables( user_id, sync_room_map, + previous_connection_state, list_config.filters, to_token, dm_room_ids, @@ -446,6 +468,9 @@ class SlidingSyncRoomLists: if sync_config.room_subscriptions: with start_active_span("assemble_room_subscriptions"): + # TODO: It would be nice to avoid these copies + room_membership_for_user_map = dict(room_membership_for_user_map) + # Find which rooms are partially stated and may need to be filtered out # depending on the `required_state` requested (see below). partial_state_rooms = await self.store.get_partial_rooms() @@ -454,10 +479,20 @@ class SlidingSyncRoomLists: room_id, room_subscription, ) in sync_config.room_subscriptions.items(): - if room_id not in room_membership_for_user_map: + # Check if we have a membership for the room, but didn't pull it out + # above. This could be e.g. a leave that we don't pull out by + # default. + current_room_entry = ( + await self.store.get_sliding_sync_room_for_user( + user_id, room_id + ) + ) + if not current_room_entry: # TODO: Handle rooms the user isn't in. continue + room_membership_for_user_map[room_id] = current_room_entry + all_rooms.add(room_id) # Take the superset of the `RoomSyncConfig` for each room. @@ -471,8 +506,6 @@ class SlidingSyncRoomLists: if room_id in partial_state_rooms: continue - all_rooms.add(room_id) - # Update our `relevant_room_map` with the room we're going to display # and need to fetch more info about. existing_room_sync_config = relevant_room_map.get(room_id) @@ -487,7 +520,7 @@ class SlidingSyncRoomLists: # Filtered subset of `relevant_room_map` for rooms that may have updates # (in the event stream) - relevant_rooms_to_send_map = await self._filter_relevant_room_to_send( + relevant_rooms_to_send_map = await self._filter_relevant_rooms_to_send( previous_connection_state, from_token, relevant_room_map ) @@ -544,6 +577,7 @@ class SlidingSyncRoomLists: filtered_sync_room_map = await self.filter_rooms( sync_config.user, sync_room_map, + previous_connection_state, list_config.filters, to_token, dm_room_ids, @@ -674,7 +708,7 @@ class SlidingSyncRoomLists: # Filtered subset of `relevant_room_map` for rooms that may have updates # (in the event stream) - relevant_rooms_to_send_map = await self._filter_relevant_room_to_send( + relevant_rooms_to_send_map = await self._filter_relevant_rooms_to_send( previous_connection_state, from_token, relevant_room_map ) @@ -689,7 +723,7 @@ class SlidingSyncRoomLists: dm_room_ids=dm_room_ids, ) - async def _filter_relevant_room_to_send( + async def _filter_relevant_rooms_to_send( self, previous_connection_state: PerConnectionState, from_token: Optional[StreamToken], @@ -974,8 +1008,17 @@ class SlidingSyncRoomLists: ) ] - # If the user has never joined any rooms before, we can just return an empty list - if not room_for_user_list: + ( + newly_joined_room_ids, + newly_left_room_map, + ) = await self._get_newly_joined_and_left_rooms( + user_id, to_token=to_token, from_token=from_token + ) + + # If the user has never joined any rooms before, we can just return an empty + # list. We also have to check the `newly_left_room_map` in case someone was + # state reset out of all of the rooms they were in. + if not room_for_user_list and not newly_left_room_map: return {}, set(), set() # Since we fetched the users room list at some point in time after the @@ -993,30 +1036,22 @@ class SlidingSyncRoomLists: else: rooms_for_user[room_id] = change_room_for_user - ( - newly_joined_room_ids, - newly_left_room_ids, - ) = await self._get_newly_joined_and_left_rooms( - user_id, to_token=to_token, from_token=from_token - ) - # Ensure we have entries for rooms that the user has been "state reset" # out of. These are rooms appear in the `newly_left_rooms` map but # aren't in the `rooms_for_user` map. - for room_id, left_event_pos in newly_left_room_ids.items(): + for room_id, newly_left_room_for_user in newly_left_room_map.items(): + # If we already know about the room, it's not a state reset if room_id in rooms_for_user: continue - rooms_for_user[room_id] = RoomsForUserStateReset( - room_id=room_id, - event_id=None, - event_pos=left_event_pos, - membership=Membership.LEAVE, - sender=None, - room_version_id=await self.store.get_room_version_id(room_id), - ) + # This should be true if it's a state reset + assert newly_left_room_for_user.membership is Membership.LEAVE + assert newly_left_room_for_user.event_id is None + assert newly_left_room_for_user.sender is None - return rooms_for_user, newly_joined_room_ids, set(newly_left_room_ids) + rooms_for_user[room_id] = newly_left_room_for_user + + return rooms_for_user, newly_joined_room_ids, set(newly_left_room_map) @trace async def _get_newly_joined_and_left_rooms( @@ -1024,7 +1059,7 @@ class SlidingSyncRoomLists: user_id: str, to_token: StreamToken, from_token: Optional[StreamToken], - ) -> Tuple[AbstractSet[str], Mapping[str, PersistedEventPosition]]: + ) -> Tuple[AbstractSet[str], Mapping[str, RoomsForUserStateReset]]: """Fetch the sets of rooms that the user newly joined or left in the given token range. @@ -1033,11 +1068,18 @@ class SlidingSyncRoomLists: "current memberships" of the user. Returns: - A 2-tuple of newly joined room IDs and a map of newly left room - IDs to the event position the leave happened at. + A 2-tuple of newly joined room IDs and a map of newly_left room + IDs to the `RoomsForUserStateReset` entry. + + We're using `RoomsForUserStateReset` but that doesn't necessarily mean the + user was state reset of the rooms. It's just that the `event_id`/`sender` + are optional and we can't tell the difference between the server leaving the + room when the user was the last person participating in the room and left or + was state reset out of the room. To actually check for a state reset, you + need to check if a membership still exists in the room. """ newly_joined_room_ids: Set[str] = set() - newly_left_room_map: Dict[str, PersistedEventPosition] = {} + newly_left_room_map: Dict[str, RoomsForUserStateReset] = {} # We need to figure out the # @@ -1108,8 +1150,13 @@ class SlidingSyncRoomLists: # 1) Figure out newly_left rooms (> `from_token` and <= `to_token`). if last_membership_change_in_from_to_range.membership == Membership.LEAVE: # 1) Mark this room as `newly_left` - newly_left_room_map[room_id] = ( - last_membership_change_in_from_to_range.event_pos + newly_left_room_map[room_id] = RoomsForUserStateReset( + room_id=room_id, + sender=last_membership_change_in_from_to_range.sender, + membership=Membership.LEAVE, + event_id=last_membership_change_in_from_to_range.event_id, + event_pos=last_membership_change_in_from_to_range.event_pos, + room_version_id=await self.store.get_room_version_id(room_id), ) # 2) Figure out `newly_joined` @@ -1553,6 +1600,7 @@ class SlidingSyncRoomLists: self, user: UserID, sync_room_map: Dict[str, RoomsForUserType], + previous_connection_state: PerConnectionState, filters: SlidingSyncConfig.SlidingSyncList.Filters, to_token: StreamToken, dm_room_ids: AbstractSet[str], @@ -1738,14 +1786,33 @@ class SlidingSyncRoomLists: ) } + # Keep rooms if the user has been state reset out of it but we previously sent + # down the connection before. We want to make sure that we send these down to + # the client regardless of filters so they find out about the state reset. + # + # We don't always have access to the state in a room after being state reset if + # no one else locally on the server is participating in the room so we patch + # these back in manually. + state_reset_out_of_room_id_set = { + room_id + for room_id in sync_room_map.keys() + if sync_room_map[room_id].event_id is None + and previous_connection_state.rooms.have_sent_room(room_id).status + != HaveSentRoomFlag.NEVER + } + # Assemble a new sync room map but only with the `filtered_room_id_set` - return {room_id: sync_room_map[room_id] for room_id in filtered_room_id_set} + return { + room_id: sync_room_map[room_id] + for room_id in filtered_room_id_set | state_reset_out_of_room_id_set + } @trace async def filter_rooms_using_tables( self, user_id: str, sync_room_map: Mapping[str, RoomsForUserSlidingSync], + previous_connection_state: PerConnectionState, filters: SlidingSyncConfig.SlidingSyncList.Filters, to_token: StreamToken, dm_room_ids: AbstractSet[str], @@ -1887,8 +1954,26 @@ class SlidingSyncRoomLists: ) } + # Keep rooms if the user has been state reset out of it but we previously sent + # down the connection before. We want to make sure that we send these down to + # the client regardless of filters so they find out about the state reset. + # + # We don't always have access to the state in a room after being state reset if + # no one else locally on the server is participating in the room so we patch + # these back in manually. + state_reset_out_of_room_id_set = { + room_id + for room_id in sync_room_map.keys() + if sync_room_map[room_id].event_id is None + and previous_connection_state.rooms.have_sent_room(room_id).status + != HaveSentRoomFlag.NEVER + } + # Assemble a new sync room map but only with the `filtered_room_id_set` - return {room_id: sync_room_map[room_id] for room_id in filtered_room_id_set} + return { + room_id: sync_room_map[room_id] + for room_id in filtered_room_id_set | state_reset_out_of_room_id_set + } @trace async def sort_rooms( diff --git a/synapse/storage/databases/main/roommember.py b/synapse/storage/databases/main/roommember.py index ded7948713..0a62613d34 100644 --- a/synapse/storage/databases/main/roommember.py +++ b/synapse/storage/databases/main/roommember.py @@ -1404,7 +1404,7 @@ class RoomMemberWorkerStore(EventsWorkerStore, CacheInvalidationWorkerStore): ) -> Mapping[str, RoomsForUserSlidingSync]: """Get all the rooms for a user to handle a sliding sync request. - Ignores forgotten rooms and rooms that the user has been kicked from. + Ignores forgotten rooms and rooms that the user has left themselves. Returns: Map from room ID to membership info @@ -1429,6 +1429,7 @@ class RoomMemberWorkerStore(EventsWorkerStore, CacheInvalidationWorkerStore): LEFT JOIN sliding_sync_joined_rooms AS j ON (j.room_id = m.room_id AND m.membership = 'join') WHERE user_id = ? AND m.forgotten = 0 + AND (m.membership != 'leave' OR m.user_id != m.sender) """ txn.execute(sql, (user_id,)) return { @@ -1455,6 +1456,49 @@ class RoomMemberWorkerStore(EventsWorkerStore, CacheInvalidationWorkerStore): get_sliding_sync_rooms_for_user_txn, ) + async def get_sliding_sync_room_for_user( + self, user_id: str, room_id: str + ) -> Optional[RoomsForUserSlidingSync]: + """Get the sliding sync room entry for the given user and room.""" + + def get_sliding_sync_room_for_user_txn( + txn: LoggingTransaction, + ) -> Optional[RoomsForUserSlidingSync]: + sql = """ + SELECT m.room_id, m.sender, m.membership, m.membership_event_id, + r.room_version, + m.event_instance_name, m.event_stream_ordering, + m.has_known_state, + COALESCE(j.room_type, m.room_type), + COALESCE(j.is_encrypted, m.is_encrypted) + FROM sliding_sync_membership_snapshots AS m + INNER JOIN rooms AS r USING (room_id) + LEFT JOIN sliding_sync_joined_rooms AS j ON (j.room_id = m.room_id AND m.membership = 'join') + WHERE user_id = ? + AND m.forgotten = 0 + AND m.room_id = ? + """ + txn.execute(sql, (user_id, room_id)) + row = txn.fetchone() + if not row: + return None + + return RoomsForUserSlidingSync( + room_id=row[0], + sender=row[1], + membership=row[2], + event_id=row[3], + room_version_id=row[4], + event_pos=PersistedEventPosition(row[5], row[6]), + has_known_state=bool(row[7]), + room_type=row[8], + is_encrypted=row[9], + ) + + return await self.db_pool.runInteraction( + "get_sliding_sync_room_for_user", get_sliding_sync_room_for_user_txn + ) + class RoomMemberBackgroundUpdateStore(SQLBaseStore): def __init__( diff --git a/synapse/storage/databases/main/state.py b/synapse/storage/databases/main/state.py index ca31122ad3..60312d770d 100644 --- a/synapse/storage/databases/main/state.py +++ b/synapse/storage/databases/main/state.py @@ -308,8 +308,24 @@ class StateGroupWorkerStore(EventsWorkerStore, SQLBaseStore): return create_event @cached(max_entries=10000) - async def get_room_type(self, room_id: str) -> Optional[str]: - raise NotImplementedError() + async def get_room_type(self, room_id: str) -> Union[Optional[str], Sentinel]: + """Fetch room type for given room. + + Since this function is cached, any missing values would be cached as + `None`. In order to distinguish between an unencrypted room that has + `None` encryption and a room that is unknown to the server where we + might want to omit the value (which would make it cached as `None`), + instead we use the sentinel value `ROOM_UNKNOWN_SENTINEL`. + """ + + try: + create_event = await self.get_create_event_for_room(room_id) + return create_event.content.get(EventContentFields.ROOM_TYPE) + except NotFoundError: + # We use the sentinel value to distinguish between `None` which is a + # valid room type and a room that is unknown to the server so the value + # is just unset. + return ROOM_UNKNOWN_SENTINEL @cachedList(cached_method_name="get_room_type", list_name="room_ids") async def bulk_get_room_type( diff --git a/synapse/storage/databases/main/stream.py b/synapse/storage/databases/main/stream.py index 0ab7cb8dbd..964f41ca57 100644 --- a/synapse/storage/databases/main/stream.py +++ b/synapse/storage/databases/main/stream.py @@ -941,6 +941,12 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore): Returns: All membership changes to the current state in the token range. Events are sorted by `stream_ordering` ascending. + + `event_id`/`sender` can be `None` when the server leaves a room (meaning + everyone locally left) or a state reset which removed the person from the + room. We can't tell the difference between the two cases with what's + available in the `current_state_delta_stream` table. To actually check for a + state reset, you need to check if a membership still exists in the room. """ # Start by ruling out cases where a DB query is not necessary. if from_key == to_key: @@ -1052,6 +1058,7 @@ class StreamWorkerStore(EventsWorkerStore, SQLBaseStore): membership=( membership if membership is not None else Membership.LEAVE ), + # This will also be null for the same reasons if `s.event_id = null` sender=sender, # Prev event prev_event_id=prev_event_id, diff --git a/tests/rest/client/sliding_sync/test_sliding_sync.py b/tests/rest/client/sliding_sync/test_sliding_sync.py index c2cfb29866..ea3ca57957 100644 --- a/tests/rest/client/sliding_sync/test_sliding_sync.py +++ b/tests/rest/client/sliding_sync/test_sliding_sync.py @@ -15,7 +15,7 @@ import logging from typing import Any, Dict, Iterable, List, Literal, Optional, Tuple from unittest.mock import AsyncMock -from parameterized import parameterized_class +from parameterized import parameterized, parameterized_class from typing_extensions import assert_never from twisted.test.proto_helpers import MemoryReactor @@ -23,12 +23,16 @@ from twisted.test.proto_helpers import MemoryReactor import synapse.rest.admin from synapse.api.constants import ( AccountDataTypes, + EventContentFields, EventTypes, + JoinRules, Membership, + RoomTypes, ) from synapse.api.room_versions import RoomVersions from synapse.events import EventBase, StrippedStateEvent, make_event_from_dict from synapse.events.snapshot import EventContext +from synapse.handlers.sliding_sync import StateValues from synapse.rest.client import account_data, devices, login, receipts, room, sync from synapse.server import HomeServer from synapse.types import ( @@ -43,6 +47,7 @@ from synapse.util.stringutils import random_string from tests import unittest from tests.server import TimedOutException +from tests.test_utils.event_injection import create_event logger = logging.getLogger(__name__) @@ -421,6 +426,9 @@ class SlidingSyncTestCase(SlidingSyncBase): self.event_sources = hs.get_event_sources() self.storage_controllers = hs.get_storage_controllers() self.account_data_handler = hs.get_account_data_handler() + persistence = self.hs.get_storage_controllers().persistence + assert persistence is not None + self.persistence = persistence super().prepare(reactor, clock, hs) @@ -988,3 +996,472 @@ class SlidingSyncTestCase(SlidingSyncBase): # Make the Sliding Sync request response_body, _ = self.do_sync(sync_body, tok=user1_tok) self.assertEqual(response_body["rooms"][room_id1]["initial"], True) + + def test_state_reset_room_comes_down_incremental_sync(self) -> None: + """Test that a room that we were state reset out of comes down + incremental sync""" + + user1_id = self.register_user("user1", "pass") + user1_tok = self.login(user1_id, "pass") + user2_id = self.register_user("user2", "pass") + user2_tok = self.login(user2_id, "pass") + + room_id1 = self.helper.create_room_as( + user2_id, + is_public=True, + tok=user2_tok, + extra_content={ + "name": "my super room", + }, + ) + + # Create an event for us to point back to for the state reset + event_response = self.helper.send(room_id1, "test", tok=user2_tok) + event_id = event_response["event_id"] + + self.helper.join(room_id1, user1_id, tok=user1_tok) + + sync_body = { + "lists": { + "foo-list": { + "ranges": [[0, 1]], + "required_state": [ + # Request all state just to see what we get back when we are + # state reset out of the room + [StateValues.WILDCARD, StateValues.WILDCARD] + ], + "timeline_limit": 1, + } + } + } + + # Make the Sliding Sync request + response_body, from_token = self.do_sync(sync_body, tok=user1_tok) + # Make sure we see room1 + self.assertIncludes(set(response_body["rooms"].keys()), {room_id1}, exact=True) + self.assertEqual(response_body["rooms"][room_id1]["initial"], True) + + # Trigger a state reset + join_rule_event, join_rule_context = self.get_success( + create_event( + self.hs, + prev_event_ids=[event_id], + type=EventTypes.JoinRules, + state_key="", + content={"join_rule": JoinRules.INVITE}, + sender=user2_id, + room_id=room_id1, + room_version=self.get_success(self.store.get_room_version_id(room_id1)), + ) + ) + _, join_rule_event_pos, _ = self.get_success( + self.persistence.persist_event(join_rule_event, join_rule_context) + ) + + # FIXME: We're manually busting the cache since + # https://github.com/element-hq/synapse/issues/17368 is not solved yet + self.store._membership_stream_cache.entity_has_changed( + user1_id, join_rule_event_pos.stream + ) + + # Ensure that the state reset worked and only user2 is in the room now + users_in_room = self.get_success(self.store.get_users_in_room(room_id1)) + self.assertIncludes(set(users_in_room), {user2_id}, exact=True) + + state_map_at_reset = self.get_success( + self.storage_controllers.state.get_current_state(room_id1) + ) + + # Update the state after user1 was state reset out of the room + self.helper.send_state( + room_id1, + EventTypes.Name, + {EventContentFields.ROOM_NAME: "my super duper room"}, + tok=user2_tok, + ) + + # Make another Sliding Sync request (incremental) + response_body, _ = self.do_sync(sync_body, since=from_token, tok=user1_tok) + + # Expect to see room1 because it is `newly_left` thanks to being state reset out + # of it since the last time we synced. We need to let the client know that + # something happened and that they are no longer in the room. + self.assertIncludes(set(response_body["rooms"].keys()), {room_id1}, exact=True) + # We set `initial=True` to indicate that the client should reset the state they + # have about the room + self.assertEqual(response_body["rooms"][room_id1]["initial"], True) + # They shouldn't see anything past the state reset + self._assertRequiredStateIncludes( + response_body["rooms"][room_id1]["required_state"], + # We should see all the state events in the room + state_map_at_reset.values(), + exact=True, + ) + # The position where the state reset happened + self.assertEqual( + response_body["rooms"][room_id1]["bump_stamp"], + join_rule_event_pos.stream, + response_body["rooms"][room_id1], + ) + + # Other non-important things. We just want to check what these are so we know + # what happens in a state reset scenario. + # + # Room name was set at the time of the state reset so we should still be able to + # see it. + self.assertEqual(response_body["rooms"][room_id1]["name"], "my super room") + # Could be set but there is no avatar for this room + self.assertIsNone( + response_body["rooms"][room_id1].get("avatar"), + response_body["rooms"][room_id1], + ) + # Could be set but this room isn't marked as a DM + self.assertIsNone( + response_body["rooms"][room_id1].get("is_dm"), + response_body["rooms"][room_id1], + ) + # Empty timeline because we are not in the room at all (they are all being + # filtered out) + self.assertIsNone( + response_body["rooms"][room_id1].get("timeline"), + response_body["rooms"][room_id1], + ) + # `limited` since we're not providing any timeline events but there are some in + # the room. + self.assertEqual(response_body["rooms"][room_id1]["limited"], True) + # User is no longer in the room so they can't see this info + self.assertIsNone( + response_body["rooms"][room_id1].get("joined_count"), + response_body["rooms"][room_id1], + ) + self.assertIsNone( + response_body["rooms"][room_id1].get("invited_count"), + response_body["rooms"][room_id1], + ) + + def test_state_reset_previously_room_comes_down_incremental_sync_with_filters( + self, + ) -> None: + """ + Test that a room that we were state reset out of should always be sent down + regardless of the filters if it has been sent down the connection before. + """ + user1_id = self.register_user("user1", "pass") + user1_tok = self.login(user1_id, "pass") + user2_id = self.register_user("user2", "pass") + user2_tok = self.login(user2_id, "pass") + + # Create a space room + space_room_id = self.helper.create_room_as( + user2_id, + tok=user2_tok, + extra_content={ + "creation_content": {EventContentFields.ROOM_TYPE: RoomTypes.SPACE}, + "name": "my super space", + }, + ) + + # Create an event for us to point back to for the state reset + event_response = self.helper.send(space_room_id, "test", tok=user2_tok) + event_id = event_response["event_id"] + + self.helper.join(space_room_id, user1_id, tok=user1_tok) + + sync_body = { + "lists": { + "foo-list": { + "ranges": [[0, 1]], + "required_state": [ + # Request all state just to see what we get back when we are + # state reset out of the room + [StateValues.WILDCARD, StateValues.WILDCARD] + ], + "timeline_limit": 1, + "filters": { + "room_types": [RoomTypes.SPACE], + }, + } + } + } + + # Make the Sliding Sync request + response_body, from_token = self.do_sync(sync_body, tok=user1_tok) + # Make sure we see room1 + self.assertIncludes( + set(response_body["rooms"].keys()), {space_room_id}, exact=True + ) + self.assertEqual(response_body["rooms"][space_room_id]["initial"], True) + + # Trigger a state reset + join_rule_event, join_rule_context = self.get_success( + create_event( + self.hs, + prev_event_ids=[event_id], + type=EventTypes.JoinRules, + state_key="", + content={"join_rule": JoinRules.INVITE}, + sender=user2_id, + room_id=space_room_id, + room_version=self.get_success( + self.store.get_room_version_id(space_room_id) + ), + ) + ) + _, join_rule_event_pos, _ = self.get_success( + self.persistence.persist_event(join_rule_event, join_rule_context) + ) + + # FIXME: We're manually busting the cache since + # https://github.com/element-hq/synapse/issues/17368 is not solved yet + self.store._membership_stream_cache.entity_has_changed( + user1_id, join_rule_event_pos.stream + ) + + # Ensure that the state reset worked and only user2 is in the room now + users_in_room = self.get_success(self.store.get_users_in_room(space_room_id)) + self.assertIncludes(set(users_in_room), {user2_id}, exact=True) + + state_map_at_reset = self.get_success( + self.storage_controllers.state.get_current_state(space_room_id) + ) + + # Update the state after user1 was state reset out of the room + self.helper.send_state( + space_room_id, + EventTypes.Name, + {EventContentFields.ROOM_NAME: "my super duper space"}, + tok=user2_tok, + ) + + # User2 also leaves the room so the server is no longer participating in the room + # and we don't have access to current state + self.helper.leave(space_room_id, user2_id, tok=user2_tok) + + # Make another Sliding Sync request (incremental) + response_body, _ = self.do_sync(sync_body, since=from_token, tok=user1_tok) + + # Expect to see room1 because it is `newly_left` thanks to being state reset out + # of it since the last time we synced. We need to let the client know that + # something happened and that they are no longer in the room. + self.assertIncludes( + set(response_body["rooms"].keys()), {space_room_id}, exact=True + ) + # We set `initial=True` to indicate that the client should reset the state they + # have about the room + self.assertEqual(response_body["rooms"][space_room_id]["initial"], True) + # They shouldn't see anything past the state reset + self._assertRequiredStateIncludes( + response_body["rooms"][space_room_id]["required_state"], + # We should see all the state events in the room + state_map_at_reset.values(), + exact=True, + ) + # The position where the state reset happened + self.assertEqual( + response_body["rooms"][space_room_id]["bump_stamp"], + join_rule_event_pos.stream, + response_body["rooms"][space_room_id], + ) + + # Other non-important things. We just want to check what these are so we know + # what happens in a state reset scenario. + # + # Room name was set at the time of the state reset so we should still be able to + # see it. + self.assertEqual( + response_body["rooms"][space_room_id]["name"], "my super space" + ) + # Could be set but there is no avatar for this room + self.assertIsNone( + response_body["rooms"][space_room_id].get("avatar"), + response_body["rooms"][space_room_id], + ) + # Could be set but this room isn't marked as a DM + self.assertIsNone( + response_body["rooms"][space_room_id].get("is_dm"), + response_body["rooms"][space_room_id], + ) + # Empty timeline because we are not in the room at all (they are all being + # filtered out) + self.assertIsNone( + response_body["rooms"][space_room_id].get("timeline"), + response_body["rooms"][space_room_id], + ) + # `limited` since we're not providing any timeline events but there are some in + # the room. + self.assertEqual(response_body["rooms"][space_room_id]["limited"], True) + # User is no longer in the room so they can't see this info + self.assertIsNone( + response_body["rooms"][space_room_id].get("joined_count"), + response_body["rooms"][space_room_id], + ) + self.assertIsNone( + response_body["rooms"][space_room_id].get("invited_count"), + response_body["rooms"][space_room_id], + ) + + @parameterized.expand( + [ + ("server_leaves_room", True), + ("server_participating_in_room", False), + ] + ) + def test_state_reset_never_room_incremental_sync_with_filters( + self, test_description: str, server_leaves_room: bool + ) -> None: + """ + Test that a room that we were state reset out of should be sent down if we can + figure out the state or if it was sent down the connection before. + """ + user1_id = self.register_user("user1", "pass") + user1_tok = self.login(user1_id, "pass") + user2_id = self.register_user("user2", "pass") + user2_tok = self.login(user2_id, "pass") + + # Create a space room + space_room_id = self.helper.create_room_as( + user2_id, + tok=user2_tok, + extra_content={ + "creation_content": {EventContentFields.ROOM_TYPE: RoomTypes.SPACE}, + "name": "my super space", + }, + ) + + # Create another space room + space_room_id2 = self.helper.create_room_as( + user2_id, + tok=user2_tok, + extra_content={ + "creation_content": {EventContentFields.ROOM_TYPE: RoomTypes.SPACE}, + }, + ) + + # Create an event for us to point back to for the state reset + event_response = self.helper.send(space_room_id, "test", tok=user2_tok) + event_id = event_response["event_id"] + + # User1 joins the rooms + # + self.helper.join(space_room_id, user1_id, tok=user1_tok) + # Join space_room_id2 so that it is at the top of the list + self.helper.join(space_room_id2, user1_id, tok=user1_tok) + + # Make a SS request for only the top room. + sync_body = { + "lists": { + "foo-list": { + "ranges": [[0, 0]], + "required_state": [ + # Request all state just to see what we get back when we are + # state reset out of the room + [StateValues.WILDCARD, StateValues.WILDCARD] + ], + "timeline_limit": 1, + "filters": { + "room_types": [RoomTypes.SPACE], + }, + } + } + } + + # Make the Sliding Sync request + response_body, from_token = self.do_sync(sync_body, tok=user1_tok) + # Make sure we only see space_room_id2 + self.assertIncludes( + set(response_body["rooms"].keys()), {space_room_id2}, exact=True + ) + self.assertEqual(response_body["rooms"][space_room_id2]["initial"], True) + + # Just create some activity in space_room_id2 so it appears when we incremental sync again + self.helper.send(space_room_id2, "test", tok=user2_tok) + + # Trigger a state reset + join_rule_event, join_rule_context = self.get_success( + create_event( + self.hs, + prev_event_ids=[event_id], + type=EventTypes.JoinRules, + state_key="", + content={"join_rule": JoinRules.INVITE}, + sender=user2_id, + room_id=space_room_id, + room_version=self.get_success( + self.store.get_room_version_id(space_room_id) + ), + ) + ) + _, join_rule_event_pos, _ = self.get_success( + self.persistence.persist_event(join_rule_event, join_rule_context) + ) + + # FIXME: We're manually busting the cache since + # https://github.com/element-hq/synapse/issues/17368 is not solved yet + self.store._membership_stream_cache.entity_has_changed( + user1_id, join_rule_event_pos.stream + ) + + # Ensure that the state reset worked and only user2 is in the room now + users_in_room = self.get_success(self.store.get_users_in_room(space_room_id)) + self.assertIncludes(set(users_in_room), {user2_id}, exact=True) + + # Update the state after user1 was state reset out of the room. + # This will also bump it to the top of the list. + self.helper.send_state( + space_room_id, + EventTypes.Name, + {EventContentFields.ROOM_NAME: "my super duper space"}, + tok=user2_tok, + ) + + if server_leaves_room: + # User2 also leaves the room so the server is no longer participating in the room + # and we don't have access to current state + self.helper.leave(space_room_id, user2_id, tok=user2_tok) + + # Make another Sliding Sync request (incremental) + sync_body = { + "lists": { + "foo-list": { + # Expand the range to include all rooms + "ranges": [[0, 1]], + "required_state": [ + # Request all state just to see what we get back when we are + # state reset out of the room + [StateValues.WILDCARD, StateValues.WILDCARD] + ], + "timeline_limit": 1, + "filters": { + "room_types": [RoomTypes.SPACE], + }, + } + } + } + response_body, _ = self.do_sync(sync_body, since=from_token, tok=user1_tok) + + if self.use_new_tables: + if server_leaves_room: + # We still only expect to see space_room_id2 because even though we were state + # reset out of space_room_id, it was never sent down the connection before so we + # don't need to bother the client with it. + self.assertIncludes( + set(response_body["rooms"].keys()), {space_room_id2}, exact=True + ) + else: + # Both rooms show up because we can figure out the state for the + # `filters.room_types` if someone is still in the room (we look at the + # current state because `room_type` never changes). + self.assertIncludes( + set(response_body["rooms"].keys()), + {space_room_id, space_room_id2}, + exact=True, + ) + else: + # Both rooms show up because we can actually take the time to figure out the + # state for the `filters.room_types` in the fallback path (we look at + # historical state for `LEAVE` membership). + self.assertIncludes( + set(response_body["rooms"].keys()), + {space_room_id, space_room_id2}, + exact=True, + ) diff --git a/tests/storage/test_stream.py b/tests/storage/test_stream.py index 837eb434aa..ed5f286243 100644 --- a/tests/storage/test_stream.py +++ b/tests/storage/test_stream.py @@ -27,7 +27,13 @@ from immutabledict import immutabledict from twisted.test.proto_helpers import MemoryReactor -from synapse.api.constants import Direction, EventTypes, Membership, RelationTypes +from synapse.api.constants import ( + Direction, + EventTypes, + JoinRules, + Membership, + RelationTypes, +) from synapse.api.filtering import Filter from synapse.crypto.event_signing import add_hashes_and_signatures from synapse.events import FrozenEventV3 @@ -1154,7 +1160,7 @@ class GetCurrentStateDeltaMembershipChangesForUserTestCase(HomeserverTestCase): room_id=room_id1, event_id=None, event_pos=dummy_state_pos, - membership="leave", + membership=Membership.LEAVE, sender=None, # user1_id, prev_event_id=join_response1["event_id"], prev_event_pos=join_pos1, @@ -1164,6 +1170,81 @@ class GetCurrentStateDeltaMembershipChangesForUserTestCase(HomeserverTestCase): ], ) + def test_state_reset2(self) -> None: + """ + Test a state reset scenario where the user gets removed from the room (when + there is no corresponding leave event) + """ + user1_id = self.register_user("user1", "pass") + user1_tok = self.login(user1_id, "pass") + user2_id = self.register_user("user2", "pass") + user2_tok = self.login(user2_id, "pass") + + room_id1 = self.helper.create_room_as(user2_id, is_public=True, tok=user2_tok) + + event_response = self.helper.send(room_id1, "test", tok=user2_tok) + event_id = event_response["event_id"] + + user1_join_response = self.helper.join(room_id1, user1_id, tok=user1_tok) + user1_join_pos = self.get_success( + self.store.get_position_for_event(user1_join_response["event_id"]) + ) + + before_reset_token = self.event_sources.get_current_token() + + # Trigger a state reset + join_rule_event, join_rule_context = self.get_success( + create_event( + self.hs, + prev_event_ids=[event_id], + type=EventTypes.JoinRules, + state_key="", + content={"join_rule": JoinRules.INVITE}, + sender=user2_id, + room_id=room_id1, + room_version=self.get_success(self.store.get_room_version_id(room_id1)), + ) + ) + _, join_rule_event_pos, _ = self.get_success( + self.persistence.persist_event(join_rule_event, join_rule_context) + ) + + # FIXME: We're manually busting the cache since + # https://github.com/element-hq/synapse/issues/17368 is not solved yet + self.store._membership_stream_cache.entity_has_changed( + user1_id, join_rule_event_pos.stream + ) + + after_reset_token = self.event_sources.get_current_token() + + membership_changes = self.get_success( + self.store.get_current_state_delta_membership_changes_for_user( + user1_id, + from_key=before_reset_token.room_key, + to_key=after_reset_token.room_key, + ) + ) + + # Let the whole diff show on failure + self.maxDiff = None + self.assertEqual( + membership_changes, + [ + CurrentStateDeltaMembership( + room_id=room_id1, + event_id=None, + # The position where the state reset happened + event_pos=join_rule_event_pos, + membership=Membership.LEAVE, + sender=None, + prev_event_id=user1_join_response["event_id"], + prev_event_pos=user1_join_pos, + prev_membership="join", + prev_sender=user1_id, + ), + ], + ) + def test_excluded_room_ids(self) -> None: """ Test that the `excluded_room_ids` option excludes changes from the specified rooms.