diff options
| -rw-r--r-- | changelog.d/6801.bugfix | 1 | ||||
| -rw-r--r-- | synapse/storage/data_stores/main/roommember.py | 37 | ||||
| -rw-r--r-- | synapse/storage/persist_events.py | 51 |
3 files changed, 83 insertions, 6 deletions
diff --git a/changelog.d/6801.bugfix b/changelog.d/6801.bugfix new file mode 100644 index 0000000000..f401fa5d69 --- /dev/null +++ b/changelog.d/6801.bugfix @@ -0,0 +1 @@ +Fix bug where Synapse didn't invalidate cache of remote users' devices when Synapse left a room. diff --git a/synapse/storage/data_stores/main/roommember.py b/synapse/storage/data_stores/main/roommember.py index 9acef7c950..042289f0e0 100644 --- a/synapse/storage/data_stores/main/roommember.py +++ b/synapse/storage/data_stores/main/roommember.py @@ -15,7 +15,7 @@ # limitations under the License. import logging -from typing import Iterable, List +from typing import Iterable, List, Set from six import iteritems, itervalues @@ -40,7 +40,7 @@ from synapse.storage.roommember import ( ProfileInfo, RoomsForUser, ) -from synapse.types import get_domain_from_id +from synapse.types import Collection, get_domain_from_id from synapse.util.async_helpers import Linearizer from synapse.util.caches import intern_string from synapse.util.caches.descriptors import cached, cachedInlineCallbacks, cachedList @@ -439,6 +439,39 @@ class RoomMemberWorkerStore(EventsWorkerStore): return results + async def get_users_server_still_shares_room_with( + self, user_ids: Collection[str] + ) -> Set[str]: + """Given a list of users return the set that the server still share a + room with. + """ + + if not user_ids: + return set() + + def _get_users_server_still_shares_room_with_txn(txn): + sql = """ + SELECT state_key FROM current_state_events + WHERE + type = 'm.room.member' + AND membership = 'join' + AND %s + GROUP BY state_key + """ + + clause, args = make_in_list_sql_clause( + self.database_engine, "state_key", user_ids + ) + + txn.execute(sql % (clause,), args) + + return set(row[0] for row in txn) + + return await self.db.runInteraction( + "get_users_server_still_shares_room_with", + _get_users_server_still_shares_room_with_txn, + ) + @defer.inlineCallbacks def get_rooms_for_user(self, user_id, on_invalidate=None): """Returns a set of room_ids the user is currently joined to. diff --git a/synapse/storage/persist_events.py b/synapse/storage/persist_events.py index d060c8b992..86166fd4c1 100644 --- a/synapse/storage/persist_events.py +++ b/synapse/storage/persist_events.py @@ -18,7 +18,7 @@ import itertools import logging from collections import deque, namedtuple -from typing import Iterable, List, Optional, Tuple +from typing import Iterable, List, Optional, Set, Tuple from six import iteritems from six.moves import range @@ -318,6 +318,11 @@ class EventsPersistenceStorage(object): # room state_delta_for_room = {} + # Set of remote users which were in rooms the server has left. We + # should check if we still share any rooms and if not we mark their + # device lists as stale. + potentially_left_users = set() # type: Set[str] + if not backfilled: with Measure(self._clock, "_calculate_state_and_extrem"): # Work out the new "current state" for each room. @@ -421,7 +426,11 @@ class EventsPersistenceStorage(object): # the room then we delete the current state and # extremities. is_still_joined = await self._is_server_still_joined( - room_id, ev_ctx_rm, delta, current_state + room_id, + ev_ctx_rm, + delta, + current_state, + potentially_left_users, ) if not is_still_joined: logger.info("Server no longer in room %s", room_id) @@ -444,6 +453,8 @@ class EventsPersistenceStorage(object): backfilled=backfilled, ) + await self._handle_potentially_left_users(potentially_left_users) + async def _calculate_new_extremities( self, room_id: str, @@ -688,6 +699,7 @@ class EventsPersistenceStorage(object): ev_ctx_rm: List[Tuple[FrozenEvent, EventContext]], delta: DeltaState, current_state: Optional[StateMap[str]], + potentially_left_users: Set[str], ) -> bool: """Check if the server will still be joined after the given events have been persised. @@ -699,6 +711,9 @@ class EventsPersistenceStorage(object): and what the new current state will be. current_state: The new current state if it already been calculated, otherwise None. + potentially_left_users: If the server has left the room, then joined + remote users will be added to this set to indicate that the + server may no longer be sharing a room with them. """ if not any( @@ -741,5 +756,33 @@ class EventsPersistenceStorage(object): is_still_joined = any(row["membership"] == Membership.JOIN for row in rows) if is_still_joined: return True - else: - return False + + # The server will leave the room, so we go and find out which remote + # users will still be joined when we leave. + remote_event_ids = [ + event_id + for (typ, state_key,), event_id in current_state.items() + if typ == EventTypes.Member and not self.is_mine_id(state_key) + ] + rows = await self.main_store.get_membership_from_event_ids(remote_event_ids) + potentially_left_users.update( + row["user_id"] for row in rows if row["membership"] == Membership.JOIN + ) + + return False + + async def _handle_potentially_left_users(self, user_ids: Set[str]): + """Given a set of remote users check if the server still shares a room with + them. If not then mark those users' device cache as stale. + """ + + if not user_ids: + return + + joined_users = await self.main_store.get_users_server_still_shares_room_with( + user_ids + ) + left_users = user_ids - joined_users + + for user_id in left_users: + await self.main_store.mark_remote_user_device_list_as_unsubscribed(user_id) |