# Copyright 2016 OpenMarket Ltd # Copyright 2019 New Vector Ltd # Copyright 2019,2020 The Matrix.org Foundation C.I.C. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import logging from typing import ( TYPE_CHECKING, Any, Collection, Dict, Iterable, List, Mapping, Optional, Set, Tuple, cast, ) from typing_extensions import Literal from synapse.api.constants import EduTypes from synapse.api.errors import Codes, StoreError from synapse.logging.opentracing import ( get_active_span_text_map, set_tag, trace, whitelisted_homeserver, ) from synapse.metrics.background_process_metrics import wrap_as_background_process from synapse.replication.tcp.streams._base import DeviceListsStream from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause from synapse.storage.database import ( DatabasePool, LoggingDatabaseConnection, LoggingTransaction, make_tuple_comparison_clause, ) from synapse.storage.databases.main.end_to_end_keys import EndToEndKeyWorkerStore from synapse.storage.databases.main.roommember import RoomMemberWorkerStore from synapse.storage.types import Cursor from synapse.storage.util.id_generators import ( AbstractStreamIdGenerator, AbstractStreamIdTracker, StreamIdGenerator, ) from synapse.types import JsonDict, StrCollection, get_verify_key_from_cross_signing_key from synapse.util import json_decoder, json_encoder from synapse.util.caches.descriptors import cached, cachedList from synapse.util.caches.lrucache import LruCache from synapse.util.caches.stream_change_cache import ( AllEntitiesChangedResult, StreamChangeCache, ) from synapse.util.cancellation import cancellable from synapse.util.iterutils import batch_iter from synapse.util.stringutils import shortstr if TYPE_CHECKING: from synapse.server import HomeServer logger = logging.getLogger(__name__) issue_8631_logger = logging.getLogger("synapse.8631_debug") DROP_DEVICE_LIST_STREAMS_NON_UNIQUE_INDEXES = ( "drop_device_list_streams_non_unique_indexes" ) BG_UPDATE_REMOVE_DUP_OUTBOUND_POKES = "remove_dup_outbound_pokes" class DeviceWorkerStore(RoomMemberWorkerStore, EndToEndKeyWorkerStore): def __init__( self, database: DatabasePool, db_conn: LoggingDatabaseConnection, hs: "HomeServer", ): super().__init__(database, db_conn, hs) # In the worker store this is an ID tracker which we overwrite in the non-worker # class below that is used on the main process. self._device_list_id_gen: AbstractStreamIdTracker = StreamIdGenerator( db_conn, hs.get_replication_notifier(), "device_lists_stream", "stream_id", extra_tables=[ ("user_signature_stream", "stream_id"), ("device_lists_outbound_pokes", "stream_id"), ("device_lists_changes_in_room", "stream_id"), ("device_lists_remote_pending", "stream_id"), ("device_lists_changes_converted_stream_position", "stream_id"), ], is_writer=hs.config.worker.worker_app is None, ) # Type-ignore: _device_list_id_gen is mixed in from either DataStore (as a # StreamIdGenerator) or SlavedDataStore (as a SlavedIdTracker). device_list_max = self._device_list_id_gen.get_current_token() device_list_prefill, min_device_list_id = self.db_pool.get_cache_dict( db_conn, "device_lists_stream", entity_column="user_id", stream_column="stream_id", max_value=device_list_max, limit=10000, ) self._device_list_stream_cache = StreamChangeCache( "DeviceListStreamChangeCache", min_device_list_id, prefilled_cache=device_list_prefill, ) ( user_signature_stream_prefill, user_signature_stream_list_id, ) = self.db_pool.get_cache_dict( db_conn, "user_signature_stream", entity_column="from_user_id", stream_column="stream_id", max_value=device_list_max, limit=1000, ) self._user_signature_stream_cache = StreamChangeCache( "UserSignatureStreamChangeCache", user_signature_stream_list_id, prefilled_cache=user_signature_stream_prefill, ) ( device_list_federation_prefill, device_list_federation_list_id, ) = self.db_pool.get_cache_dict( db_conn, "device_lists_outbound_pokes", entity_column="destination", stream_column="stream_id", max_value=device_list_max, limit=10000, ) self._device_list_federation_stream_cache = StreamChangeCache( "DeviceListFederationStreamChangeCache", device_list_federation_list_id, prefilled_cache=device_list_federation_prefill, ) if hs.config.worker.run_background_tasks: self._clock.looping_call( self._prune_old_outbound_device_pokes, 60 * 60 * 1000 ) def process_replication_rows( self, stream_name: str, instance_name: str, token: int, rows: Iterable[Any] ) -> None: if stream_name == DeviceListsStream.NAME: self._invalidate_caches_for_devices(token, rows) return super().process_replication_rows(stream_name, instance_name, token, rows) def process_replication_position( self, stream_name: str, instance_name: str, token: int ) -> None: if stream_name == DeviceListsStream.NAME: self._device_list_id_gen.advance(instance_name, token) super().process_replication_position(stream_name, instance_name, token) def _invalidate_caches_for_devices( self, token: int, rows: Iterable[DeviceListsStream.DeviceListsStreamRow] ) -> None: for row in rows: if row.is_signature: self._user_signature_stream_cache.entity_has_changed(row.entity, token) continue # The entities are either user IDs (starting with '@') whose devices # have changed, or remote servers that we need to tell about # changes. if row.entity.startswith("@"): self._device_list_stream_cache.entity_has_changed(row.entity, token) self.get_cached_devices_for_user.invalidate((row.entity,)) self._get_cached_user_device.invalidate((row.entity,)) self.get_device_list_last_stream_id_for_remote.invalidate((row.entity,)) else: self._device_list_federation_stream_cache.entity_has_changed( row.entity, token ) def get_device_stream_token(self) -> int: return self._device_list_id_gen.get_current_token() async def count_devices_by_users( self, user_ids: Optional[Collection[str]] = None ) -> int: """Retrieve number of all devices of given users. Only returns number of devices that are not marked as hidden. Args: user_ids: The IDs of the users which owns devices Returns: Number of devices of this users. """ def count_devices_by_users_txn( txn: LoggingTransaction, user_ids: Collection[str] ) -> int: sql = """ SELECT count(*) FROM devices WHERE hidden = '0' AND """ clause, args = make_in_list_sql_clause( txn.database_engine, "user_id", user_ids ) txn.execute(sql + clause, args) return cast(Tuple[int], txn.fetchone())[0] if not user_ids: return 0 return await self.db_pool.runInteraction( "count_devices_by_users", count_devices_by_users_txn, user_ids ) async def get_device( self, user_id: str, device_id: str ) -> Optional[Dict[str, Any]]: """Retrieve a device. Only returns devices that are not marked as hidden. Args: user_id: The ID of the user which owns the device device_id: The ID of the device to retrieve Returns: A dict containing the device information, or `None` if the device does not exist. """ return await self.db_pool.simple_select_one( table="devices", keyvalues={"user_id": user_id, "device_id": device_id, "hidden": False}, retcols=("user_id", "device_id", "display_name"), desc="get_device", allow_none=True, ) async def get_device_opt( self, user_id: str, device_id: str ) -> Optional[Dict[str, Any]]: """Retrieve a device. Only returns devices that are not marked as hidden. Args: user_id: The ID of the user which owns the device device_id: The ID of the device to retrieve Returns: A dict containing the device information, or None if the device does not exist. """ return await self.db_pool.simple_select_one( table="devices", keyvalues={"user_id": user_id, "device_id": device_id, "hidden": False}, retcols=("user_id", "device_id", "display_name"), desc="get_device", allow_none=True, ) async def get_devices_by_user(self, user_id: str) -> Dict[str, Dict[str, str]]: """Retrieve all of a user's registered devices. Only returns devices that are not marked as hidden. Args: user_id: Returns: A mapping from device_id to a dict containing "device_id", "user_id" and "display_name" for each device. """ devices = await self.db_pool.simple_select_list( table="devices", keyvalues={"user_id": user_id, "hidden": False}, retcols=("user_id", "device_id", "display_name"), desc="get_devices_by_user", ) return {d["device_id"]: d for d in devices} async def get_devices_by_auth_provider_session_id( self, auth_provider_id: str, auth_provider_session_id: str ) -> List[Dict[str, Any]]: """Retrieve the list of devices associated with a SSO IdP session ID. Args: auth_provider_id: The SSO IdP ID as defined in the server config auth_provider_session_id: The session ID within the IdP Returns: A list of dicts containing the device_id and the user_id of each device """ return await self.db_pool.simple_select_list( table="device_auth_providers", keyvalues={ "auth_provider_id": auth_provider_id, "auth_provider_session_id": auth_provider_session_id, }, retcols=("user_id", "device_id"), desc="get_devices_by_auth_provider_session_id", ) @trace async def get_device_updates_by_remote( self, destination: str, from_stream_id: int, limit: int ) -> Tuple[int, List[Tuple[str, JsonDict]]]: """Get a stream of device updates to send to the given remote server. Args: destination: The host the device updates are intended for from_stream_id: The minimum stream_id to filter updates by, exclusive limit: Maximum number of device updates to return Returns: - The current stream id (i.e. the stream id of the last update included in the response); and - The list of updates, where each update is a pair of EDU type and EDU contents. """ now_stream_id = self.get_device_stream_token() has_changed = self._device_list_federation_stream_cache.has_entity_changed( destination, int(from_stream_id) ) if not has_changed: # debugging for https://github.com/matrix-org/synapse/issues/14251 issue_8631_logger.debug( "%s: no change between %i and %i", destination, from_stream_id, now_stream_id, ) return now_stream_id, [] updates = await self.db_pool.runInteraction( "get_device_updates_by_remote", self._get_device_updates_by_remote_txn, destination, from_stream_id, now_stream_id, limit, ) # We need to ensure `updates` doesn't grow too big. # Currently: `len(updates) <= limit`. # Return an empty list if there are no updates if not updates: return now_stream_id, [] if issue_8631_logger.isEnabledFor(logging.DEBUG): data = {(user, device): stream_id for user, device, stream_id, _ in updates} issue_8631_logger.debug( "device updates need to be sent to %s: %s", destination, data ) # get the cross-signing keys of the users in the list, so that we can # determine which of the device changes were cross-signing keys users = {r[0] for r in updates} master_key_by_user = {} self_signing_key_by_user = {} for user in users: cross_signing_key = await self.get_e2e_cross_signing_key(user, "master") if cross_signing_key: key_id, verify_key = get_verify_key_from_cross_signing_key( cross_signing_key ) # verify_key is a VerifyKey from signedjson, which uses # .version to denote the portion of the key ID after the # algorithm and colon, which is the device ID master_key_by_user[user] = { "key_info": cross_signing_key, "device_id": verify_key.version, } cross_signing_key = await self.get_e2e_cross_signing_key( user, "self_signing" ) if cross_signing_key: key_id, verify_key = get_verify_key_from_cross_signing_key( cross_signing_key ) self_signing_key_by_user[user] = { "key_info": cross_signing_key, "device_id": verify_key.version, } # Perform the equivalent of a GROUP BY # # Iterate through the updates list and copy non-duplicate # (user_id, device_id) entries into a map, with the value being # the max stream_id across each set of duplicate entries # # maps (user_id, device_id) -> (stream_id, opentracing_context) # # opentracing_context contains the opentracing metadata for the request # that created the poke # # The most recent request's opentracing_context is used as the # context which created the Edu. # This is the stream ID that we will return for the consumer to resume # following this stream later. last_processed_stream_id = from_stream_id # A map of (user ID, device ID) to (stream ID, context). query_map: Dict[Tuple[str, str], Tuple[int, Optional[str]]] = {} cross_signing_keys_by_user: Dict[str, Dict[str, object]] = {} for user_id, device_id, update_stream_id, update_context in updates: # Calculate the remaining length budget. # Note that, for now, each entry in `cross_signing_keys_by_user` # gives rise to two device updates in the result, so those cost twice # as much (and are the whole reason we need to separately calculate # the budget; we know len(updates) <= limit otherwise!) # N.B. len() on dicts is cheap since they store their size. remaining_length_budget = limit - ( len(query_map) + 2 * len(cross_signing_keys_by_user) ) assert remaining_length_budget >= 0 is_master_key_update = ( user_id in master_key_by_user and device_id == master_key_by_user[user_id]["device_id"] ) is_self_signing_key_update = ( user_id in self_signing_key_by_user and device_id == self_signing_key_by_user[user_id]["device_id"] ) is_cross_signing_key_update = ( is_master_key_update or is_self_signing_key_update ) if ( is_cross_signing_key_update and user_id not in cross_signing_keys_by_user ): # This will give rise to 2 device updates. # If we don't have the budget, stop here! if remaining_length_budget < 2: break if is_master_key_update: result = cross_signing_keys_by_user.setdefault(user_id, {}) result["master_key"] = master_key_by_user[user_id]["key_info"] elif is_self_signing_key_update: result = cross_signing_keys_by_user.setdefault(user_id, {}) result["self_signing_key"] = self_signing_key_by_user[user_id][ "key_info" ] else: key = (user_id, device_id) if key not in query_map and remaining_length_budget < 1: # We don't have space for a new entry break previous_update_stream_id, _ = query_map.get(key, (0, None)) if update_stream_id > previous_update_stream_id: # FIXME If this overwrites an older update, this discards the # previous OpenTracing context. # It might make it harder to track down issues using OpenTracing. # If there's a good reason why it doesn't matter, a comment here # about that would not hurt. query_map[key] = (update_stream_id, update_context) # As this update has been added to the response, advance the stream # position. last_processed_stream_id = update_stream_id # In the worst case scenario, each update is for a distinct user and is # added either to the query_map or to cross_signing_keys_by_user, # but not both: # len(query_map) + len(cross_signing_keys_by_user) <= len(updates) here, # so len(query_map) + len(cross_signing_keys_by_user) <= limit. results = await self._get_device_update_edus_by_remote( destination, from_stream_id, query_map ) # len(results) <= len(query_map) here, # so len(results) + len(cross_signing_keys_by_user) <= limit. # Add the updated cross-signing keys to the results list for user_id, result in cross_signing_keys_by_user.items(): result["user_id"] = user_id results.append((EduTypes.SIGNING_KEY_UPDATE, result)) # also send the unstable version # FIXME: remove this when enough servers have upgraded # and remove the length budgeting above. results.append(("org.matrix.signing_key_update", result)) if issue_8631_logger.isEnabledFor(logging.DEBUG): for user_id, edu in results: issue_8631_logger.debug( "device update to %s for %s from %s to %s: %s", destination, user_id, from_stream_id, last_processed_stream_id, edu, ) return last_processed_stream_id, results def _get_device_updates_by_remote_txn( self, txn: LoggingTransaction, destination: str, from_stream_id: int, now_stream_id: int, limit: int, ) -> List[Tuple[str, str, int, Optional[str]]]: """Return device update information for a given remote destination Args: txn: The transaction to execute destination: The host the device updates are intended for from_stream_id: The minimum stream_id to filter updates by, exclusive now_stream_id: The maximum stream_id to filter updates by, inclusive limit: Maximum number of device updates to return Returns: List of device update tuples: - user_id - device_id - stream_id - opentracing_context """ # get the list of device updates that need to be sent sql = """ SELECT user_id, device_id, stream_id, opentracing_context FROM device_lists_outbound_pokes WHERE destination = ? AND ? < stream_id AND stream_id <= ? ORDER BY stream_id LIMIT ? """ txn.execute(sql, (destination, from_stream_id, now_stream_id, limit)) return cast(List[Tuple[str, str, int, Optional[str]]], txn.fetchall()) async def _get_device_update_edus_by_remote( self, destination: str, from_stream_id: int, query_map: Dict[Tuple[str, str], Tuple[int, Optional[str]]], ) -> List[Tuple[str, dict]]: """Returns a list of device update EDUs as well as E2EE keys Args: destination: The host the device updates are intended for from_stream_id: The minimum stream_id to filter updates by, exclusive query_map: Dictionary mapping (user_id, device_id) to (update stream_id, the relevant json-encoded opentracing context) Returns: List of objects representing a device update EDU. Postconditions: The returned list has a length not exceeding that of the query_map: len(result) <= len(query_map) """ devices = ( await self.get_e2e_device_keys_and_signatures( # Because these are (user_id, device_id) tuples with all # device_ids not being None, the returned list's length will not # exceed that of query_map. query_map.keys(), include_all_devices=True, include_deleted_devices=True, ) if query_map else {} ) results = [] for user_id, user_devices in devices.items(): # The prev_id for the first row is always the last row before # `from_stream_id` prev_id = await self._get_last_device_update_for_remote_user( destination, user_id, from_stream_id ) # make sure we go through the devices in stream order device_ids = sorted( user_devices.keys(), key=lambda i: query_map[(user_id, i)][0], ) for device_id in device_ids: device = user_devices[device_id] stream_id, opentracing_context = query_map[(user_id, device_id)] result = { "user_id": user_id, "device_id": device_id, "prev_id": [prev_id] if prev_id else [], "stream_id": stream_id, } if opentracing_context != "{}": result["org.matrix.opentracing_context"] = opentracing_context prev_id = stream_id if device is not None: keys = device.keys if keys: result["keys"] = keys device_display_name = None if ( self.hs.config.federation.allow_device_name_lookup_over_federation ): device_display_name = device.display_name if device_display_name: result["device_display_name"] = device_display_name else: result["deleted"] = True results.append((EduTypes.DEVICE_LIST_UPDATE, result)) return results async def _get_last_device_update_for_remote_user( self, destination: str, user_id: str, from_stream_id: int ) -> int: def f(txn: LoggingTransaction) -> int: prev_sent_id_sql = """ SELECT coalesce(max(stream_id), 0) as stream_id FROM device_lists_outbound_last_success WHERE destination = ? AND user_id = ? AND stream_id <= ? """ txn.execute(prev_sent_id_sql, (destination, user_id, from_stream_id)) rows = txn.fetchall() return rows[0][0] return await self.db_pool.runInteraction( "get_last_device_update_for_remote_user", f ) async def mark_as_sent_devices_by_remote( self, destination: str, stream_id: int ) -> None: """Mark that updates have successfully been sent to the destination.""" await self.db_pool.runInteraction( "mark_as_sent_devices_by_remote", self._mark_as_sent_devices_by_remote_txn, destination, stream_id, ) def _mark_as_sent_devices_by_remote_txn( self, txn: LoggingTransaction, destination: str, stream_id: int ) -> None: # We update the device_lists_outbound_last_success with the successfully # poked users. sql = """ SELECT user_id, coalesce(max(o.stream_id), 0) FROM device_lists_outbound_pokes as o WHERE destination = ? AND o.stream_id <= ? GROUP BY user_id """ txn.execute(sql, (destination, stream_id)) rows = txn.fetchall() self.db_pool.simple_upsert_many_txn( txn=txn, table="device_lists_outbound_last_success", key_names=("destination", "user_id"), key_values=[(destination, user_id) for user_id, _ in rows], value_names=("stream_id",), value_values=((stream_id,) for _, stream_id in rows), ) # Delete all sent outbound pokes sql = """ DELETE FROM device_lists_outbound_pokes WHERE destination = ? AND stream_id <= ? """ txn.execute(sql, (destination, stream_id)) async def add_user_signature_change_to_streams( self, from_user_id: str, user_ids: List[str] ) -> int: """Persist that a user has made new signatures Args: from_user_id: the user who made the signatures user_ids: the users who were signed Returns: The new stream ID. """ # TODO: this looks like it's _writing_. Should this be on DeviceStore rather # than DeviceWorkerStore? async with self._device_list_id_gen.get_next() as stream_id: # type: ignore[attr-defined] await self.db_pool.runInteraction( "add_user_sig_change_to_streams", self._add_user_signature_change_txn, from_user_id, user_ids, stream_id, ) return stream_id def _add_user_signature_change_txn( self, txn: LoggingTransaction, from_user_id: str, user_ids: List[str], stream_id: int, ) -> None: txn.call_after( self._user_signature_stream_cache.entity_has_changed, from_user_id, stream_id, ) self.db_pool.simple_insert_txn( txn, "user_signature_stream", values={ "stream_id": stream_id, "from_user_id": from_user_id, "user_ids": json_encoder.encode(user_ids), }, ) @trace @cancellable async def get_user_devices_from_cache( self, user_ids: Set[str], user_and_device_ids: List[Tuple[str, str]] ) -> Tuple[Set[str], Dict[str, Mapping[str, JsonDict]]]: """Get the devices (and keys if any) for remote users from the cache. Args: user_ids: users which should have all device IDs returned user_and_device_ids: List of (user_id, device_ids) Returns: A tuple of (user_ids_not_in_cache, results_map), where user_ids_not_in_cache is a set of user_ids and results_map is a mapping of user_id -> device_id -> device_info. """ unique_user_ids = user_ids | {user_id for user_id, _ in user_and_device_ids} user_map = await self.get_device_list_last_stream_id_for_remotes( list(unique_user_ids) ) # We go and check if any of the users need to have their device lists # resynced. If they do then we remove them from the cached list. users_needing_resync = await self.get_user_ids_requiring_device_list_resync( unique_user_ids ) user_ids_in_cache = { user_id for user_id, stream_id in user_map.items() if stream_id } - users_needing_resync user_ids_not_in_cache = unique_user_ids - user_ids_in_cache # First fetch all the users which all devices are to be returned. results: Dict[str, Mapping[str, JsonDict]] = {} for user_id in user_ids: if user_id in user_ids_in_cache: results[user_id] = await self.get_cached_devices_for_user(user_id) # Then fetch all device-specific requests, but skip users we've already # fetched all devices for. device_specific_results: Dict[str, Dict[str, JsonDict]] = {} for user_id, device_id in user_and_device_ids: if user_id in user_ids_in_cache and user_id not in user_ids: device = await self._get_cached_user_device(user_id, device_id) device_specific_results.setdefault(user_id, {})[device_id] = device results.update(device_specific_results) set_tag("in_cache", str(results)) set_tag("not_in_cache", str(user_ids_not_in_cache)) return user_ids_not_in_cache, results @cached(num_args=2, tree=True) async def _get_cached_user_device(self, user_id: str, device_id: str) -> JsonDict: content = await self.db_pool.simple_select_one_onecol( table="device_lists_remote_cache", keyvalues={"user_id": user_id, "device_id": device_id}, retcol="content", desc="_get_cached_user_device", ) return db_to_json(content) @cached() async def get_cached_devices_for_user(self, user_id: str) -> Mapping[str, JsonDict]: devices = await self.db_pool.simple_select_list( table="device_lists_remote_cache", keyvalues={"user_id": user_id}, retcols=("device_id", "content"), desc="get_cached_devices_for_user", ) return { device["device_id"]: db_to_json(device["content"]) for device in devices } def get_cached_device_list_changes( self, from_key: int, ) -> AllEntitiesChangedResult: """Get set of users whose devices have changed since `from_key`, or None if that information is not in our cache. """ return self._device_list_stream_cache.get_all_entities_changed(from_key) @cancellable async def get_all_devices_changed( self, from_key: int, to_key: int, ) -> Set[str]: """Get all users whose devices have changed in the given range. Args: from_key: The minimum device lists stream token to query device list changes for, exclusive. to_key: The maximum device lists stream token to query device list changes for, inclusive. Returns: The set of user_ids whose devices have changed since `from_key` (exclusive) until `to_key` (inclusive). """ result = self._device_list_stream_cache.get_all_entities_changed(from_key) if result.hit: # We know which users might have changed devices. if not result.entities: # If no users then we can return early. return set() # Otherwise we need to filter down the list return await self.get_users_whose_devices_changed( from_key, result.entities, to_key ) # If the cache didn't tell us anything, we just need to query the full # range. sql = """ SELECT DISTINCT user_id FROM device_lists_stream WHERE ? < stream_id AND stream_id <= ? """ rows = await self.db_pool.execute( "get_all_devices_changed", None, sql, from_key, to_key, ) return {u for u, in rows} @cancellable async def get_users_whose_devices_changed( self, from_key: int, user_ids: Collection[str], to_key: Optional[int] = None, ) -> Set[str]: """Get set of users whose devices have changed since `from_key` that are in the given list of user_ids. Args: from_key: The minimum device lists stream token to query device list changes for, exclusive. user_ids: If provided, only check if these users have changed their device lists. Otherwise changes from all users are returned. to_key: The maximum device lists stream token to query device list changes for, inclusive. Returns: The set of user_ids whose devices have changed since `from_key` (exclusive) until `to_key` (inclusive). """ # Get set of users who *may* have changed. Users not in the returned # list have definitely not changed. user_ids_to_check = self._device_list_stream_cache.get_entities_changed( user_ids, from_key ) # If an empty set was returned, there's nothing to do. if not user_ids_to_check: return set() if to_key is None: to_key = self._device_list_id_gen.get_current_token() def _get_users_whose_devices_changed_txn(txn: LoggingTransaction) -> Set[str]: sql = """ SELECT DISTINCT user_id FROM device_lists_stream WHERE ? < stream_id AND stream_id <= ? AND %s """ changes: Set[str] = set() # Query device changes with a batch of users at a time for chunk in batch_iter(user_ids_to_check, 100): clause, args = make_in_list_sql_clause( txn.database_engine, "user_id", chunk ) txn.execute(sql % (clause,), [from_key, to_key] + args) changes.update(user_id for user_id, in txn) return changes return await self.db_pool.runInteraction( "get_users_whose_devices_changed", _get_users_whose_devices_changed_txn ) async def get_users_whose_signatures_changed( self, user_id: str, from_key: int ) -> Set[str]: """Get the users who have new cross-signing signatures made by `user_id` since `from_key`. Args: user_id: the user who made the signatures from_key: The device lists stream token Returns: A set of user IDs with updated signatures. """ if self._user_signature_stream_cache.has_entity_changed(user_id, from_key): sql = """ SELECT DISTINCT user_ids FROM user_signature_stream WHERE from_user_id = ? AND stream_id > ? """ rows = await self.db_pool.execute( "get_users_whose_signatures_changed", None, sql, user_id, from_key ) return {user for row in rows for user in db_to_json(row[0])} else: return set() async def get_all_device_list_changes_for_remotes( self, instance_name: str, last_id: int, current_id: int, limit: int ) -> Tuple[List[Tuple[int, tuple]], int, bool]: """Get updates for device lists replication stream. Args: instance_name: The writer we want to fetch updates from. Unused here since there is only ever one writer. last_id: The token to fetch updates from. Exclusive. current_id: The token to fetch updates up to. Inclusive. limit: The requested limit for the number of rows to return. The function may return more or fewer rows. Returns: A tuple consisting of: the updates, a token to use to fetch subsequent updates, and whether we returned fewer rows than exists between the requested tokens due to the limit. The token returned can be used in a subsequent call to this function to get further updates. The updates are a list of 2-tuples of stream ID and the row data """ if last_id == current_id: return [], current_id, False def _get_all_device_list_changes_for_remotes( txn: Cursor, ) -> Tuple[List[Tuple[int, tuple]], int, bool]: # This query Does The Right Thing where it'll correctly apply the # bounds to the inner queries. sql = """ SELECT stream_id, entity FROM ( SELECT stream_id, user_id AS entity FROM device_lists_stream UNION ALL SELECT stream_id, destination AS entity FROM device_lists_outbound_pokes ) AS e WHERE ? < stream_id AND stream_id <= ? ORDER BY stream_id ASC LIMIT ? """ txn.execute(sql, (last_id, current_id, limit)) updates = [(row[0], row[1:]) for row in txn] limited = False upto_token = current_id if len(updates) >= limit: upto_token = updates[-1][0] limited = True return updates, upto_token, limited return await self.db_pool.runInteraction( "get_all_device_list_changes_for_remotes", _get_all_device_list_changes_for_remotes, ) @cached(max_entries=10000) async def get_device_list_last_stream_id_for_remote( self, user_id: str ) -> Optional[str]: """Get the last stream_id we got for a user. May be None if we haven't got any information for them. """ return await self.db_pool.simple_select_one_onecol( table="device_lists_remote_extremeties", keyvalues={"user_id": user_id}, retcol="stream_id", desc="get_device_list_last_stream_id_for_remote", allow_none=True, ) @cachedList( cached_method_name="get_device_list_last_stream_id_for_remote", list_name="user_ids", ) async def get_device_list_last_stream_id_for_remotes( self, user_ids: Iterable[str] ) -> Dict[str, Optional[str]]: rows = await self.db_pool.simple_select_many_batch( table="device_lists_remote_extremeties", column="user_id", iterable=user_ids, retcols=("user_id", "stream_id"), desc="get_device_list_last_stream_id_for_remotes", ) results: Dict[str, Optional[str]] = {user_id: None for user_id in user_ids} results.update({row["user_id"]: row["stream_id"] for row in rows}) return results async def get_user_ids_requiring_device_list_resync( self, user_ids: Optional[Collection[str]] = None, ) -> Set[str]: """Given a list of remote users return the list of users that we should resync the device lists for. If None is given instead of a list, return every user that we should resync the device lists for. Returns: The IDs of users whose device lists need resync. """ if user_ids: rows = await self.db_pool.simple_select_many_batch( table="device_lists_remote_resync", column="user_id", iterable=user_ids, retcols=("user_id",), desc="get_user_ids_requiring_device_list_resync_with_iterable", ) else: rows = await self.db_pool.simple_select_list( table="device_lists_remote_resync", keyvalues=None, retcols=("user_id",), desc="get_user_ids_requiring_device_list_resync", ) return {row["user_id"] for row in rows} async def mark_remote_users_device_caches_as_stale( self, user_ids: StrCollection ) -> None: """Records that the server has reason to believe the cache of the devices for the remote users is out of date. """ def _mark_remote_users_device_caches_as_stale_txn( txn: LoggingTransaction, ) -> None: # TODO add insertion_values support to simple_upsert_many and use # that! for user_id in user_ids: self.db_pool.simple_upsert_txn( txn, table="device_lists_remote_resync", keyvalues={"user_id": user_id}, values={}, insertion_values={"added_ts": self._clock.time_msec()}, ) await self.db_pool.runInteraction( "mark_remote_users_device_caches_as_stale", _mark_remote_users_device_caches_as_stale_txn, ) async def mark_remote_user_device_cache_as_valid(self, user_id: str) -> None: # Remove the database entry that says we need to resync devices, after a resync await self.db_pool.simple_delete( table="device_lists_remote_resync", keyvalues={"user_id": user_id}, desc="mark_remote_user_device_cache_as_valid", ) async def handle_potentially_left_users(self, user_ids: Set[str]) -> None: """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 await self.db_pool.runInteraction( "_handle_potentially_left_users", self.handle_potentially_left_users_txn, user_ids, ) def handle_potentially_left_users_txn( self, txn: LoggingTransaction, user_ids: Set[str], ) -> None: """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 = self.get_users_server_still_shares_room_with_txn(txn, user_ids) left_users = user_ids - joined_users for user_id in left_users: self.mark_remote_user_device_list_as_unsubscribed_txn(txn, user_id) async def mark_remote_user_device_list_as_unsubscribed(self, user_id: str) -> None: """Mark that we no longer track device lists for remote user.""" await self.db_pool.runInteraction( "mark_remote_user_device_list_as_unsubscribed", self.mark_remote_user_device_list_as_unsubscribed_txn, user_id, ) def mark_remote_user_device_list_as_unsubscribed_txn( self, txn: LoggingTransaction, user_id: str, ) -> None: self.db_pool.simple_delete_txn( txn, table="device_lists_remote_extremeties", keyvalues={"user_id": user_id}, ) self._invalidate_cache_and_stream( txn, self.get_device_list_last_stream_id_for_remote, (user_id,) ) async def get_dehydrated_device( self, user_id: str ) -> Optional[Tuple[str, JsonDict]]: """Retrieve the information for a dehydrated device. Args: user_id: the user whose dehydrated device we are looking for Returns: a tuple whose first item is the device ID, and the second item is the dehydrated device information """ # FIXME: make sure device ID still exists in devices table row = await self.db_pool.simple_select_one( table="dehydrated_devices", keyvalues={"user_id": user_id}, retcols=["device_id", "device_data"], allow_none=True, ) return ( (row["device_id"], json_decoder.decode(row["device_data"])) if row else None ) def _store_dehydrated_device_txn( self, txn: LoggingTransaction, user_id: str, device_id: str, device_data: str ) -> Optional[str]: old_device_id = self.db_pool.simple_select_one_onecol_txn( txn, table="dehydrated_devices", keyvalues={"user_id": user_id}, retcol="device_id", allow_none=True, ) self.db_pool.simple_upsert_txn( txn, table="dehydrated_devices", keyvalues={"user_id": user_id}, values={"device_id": device_id, "device_data": device_data}, ) return old_device_id async def store_dehydrated_device( self, user_id: str, device_id: str, device_data: JsonDict ) -> Optional[str]: """Store a dehydrated device for a user. Args: user_id: the user that we are storing the device for device_id: the ID of the dehydrated device device_data: the dehydrated device information Returns: device id of the user's previous dehydrated device, if any """ return await self.db_pool.runInteraction( "store_dehydrated_device_txn", self._store_dehydrated_device_txn, user_id, device_id, json_encoder.encode(device_data), ) async def remove_dehydrated_device(self, user_id: str, device_id: str) -> bool: """Remove a dehydrated device. Args: user_id: the user that the dehydrated device belongs to device_id: the ID of the dehydrated device """ count = await self.db_pool.simple_delete( "dehydrated_devices", {"user_id": user_id, "device_id": device_id}, desc="remove_dehydrated_device", ) return count >= 1 @wrap_as_background_process("prune_old_outbound_device_pokes") async def _prune_old_outbound_device_pokes( self, prune_age: int = 24 * 60 * 60 * 1000 ) -> None: """Delete old entries out of the device_lists_outbound_pokes to ensure that we don't fill up due to dead servers. Normally, we try to send device updates as a delta since a previous known point: this is done by setting the prev_id in the m.device_list_update EDU. However, for that to work, we have to have a complete record of each change to each device, which can add up to quite a lot of data. An alternative mechanism is that, if the remote server sees that it has missed an entry in the stream_id sequence for a given user, it will request a full list of that user's devices. Hence, we can reduce the amount of data we have to store (and transmit in some future transaction), by clearing almost everything for a given destination out of the database, and having the remote server resync. All we need to do is make sure we keep at least one row for each (user, destination) pair, to remind us to send a m.device_list_update EDU for that user when the destination comes back. It doesn't matter which device we keep. """ yesterday = self._clock.time_msec() - prune_age def _prune_txn(txn: LoggingTransaction) -> None: # look for (user, destination) pairs which have an update older than # the cutoff. # # For each pair, we also need to know the most recent stream_id, and # an arbitrary device_id at that stream_id. select_sql = """ SELECT dlop1.destination, dlop1.user_id, MAX(dlop1.stream_id) AS stream_id, (SELECT MIN(dlop2.device_id) AS device_id FROM device_lists_outbound_pokes dlop2 WHERE dlop2.destination = dlop1.destination AND dlop2.user_id=dlop1.user_id AND dlop2.stream_id=MAX(dlop1.stream_id) ) FROM device_lists_outbound_pokes dlop1 GROUP BY destination, user_id HAVING min(ts) < ? AND count(*) > 1 """ txn.execute(select_sql, (yesterday,)) rows = txn.fetchall() if not rows: return logger.info( "Pruning old outbound device list updates for %i users/destinations: %s", len(rows), shortstr((row[0], row[1]) for row in rows), ) # we want to keep the update with the highest stream_id for each user. # # there might be more than one update (with different device_ids) with the # same stream_id, so we also delete all but one rows with the max stream id. delete_sql = """ DELETE FROM device_lists_outbound_pokes WHERE destination = ? AND user_id = ? AND ( stream_id < ? OR (stream_id = ? AND device_id != ?) ) """ count = 0 for destination, user_id, stream_id, device_id in rows: txn.execute( delete_sql, (destination, user_id, stream_id, stream_id, device_id) ) count += txn.rowcount # Since we've deleted unsent deltas, we need to remove the entry # of last successful sent so that the prev_ids are correctly set. sql = """ DELETE FROM device_lists_outbound_last_success WHERE destination = ? AND user_id = ? """ txn.execute_batch(sql, ((row[0], row[1]) for row in rows)) logger.info("Pruned %d device list outbound pokes", count) await self.db_pool.runInteraction( "_prune_old_outbound_device_pokes", _prune_txn, ) async def get_local_devices_not_accessed_since( self, since_ms: int ) -> Dict[str, List[str]]: """Retrieves local devices that haven't been accessed since a given date. Args: since_ms: the timestamp to select on, every device with a last access date from before that time is returned. Returns: A dictionary with an entry for each user with at least one device matching the request, which value is a list of the device ID(s) for the corresponding device(s). """ def get_devices_not_accessed_since_txn( txn: LoggingTransaction, ) -> List[Dict[str, str]]: sql = """ SELECT user_id, device_id FROM devices WHERE last_seen < ? AND hidden = FALSE """ txn.execute(sql, (since_ms,)) return self.db_pool.cursor_to_dict(txn) rows = await self.db_pool.runInteraction( "get_devices_not_accessed_since", get_devices_not_accessed_since_txn, ) devices: Dict[str, List[str]] = {} for row in rows: # Remote devices are never stale from our point of view. if self.hs.is_mine_id(row["user_id"]): user_devices = devices.setdefault(row["user_id"], []) user_devices.append(row["device_id"]) return devices @cached() async def _get_min_device_lists_changes_in_room(self) -> int: """Returns the minimum stream ID that we have entries for `device_lists_changes_in_room` """ return await self.db_pool.simple_select_one_onecol( table="device_lists_changes_in_room", keyvalues={}, retcol="COALESCE(MIN(stream_id), 0)", desc="get_min_device_lists_changes_in_room", ) @cancellable async def get_device_list_changes_in_rooms( self, room_ids: Collection[str], from_id: int ) -> Optional[Set[str]]: """Return the set of users whose devices have changed in the given rooms since the given stream ID. Returns None if the given stream ID is too old. """ if not room_ids: return set() min_stream_id = await self._get_min_device_lists_changes_in_room() if min_stream_id > from_id: return None sql = """ SELECT DISTINCT user_id FROM device_lists_changes_in_room WHERE {clause} AND stream_id >= ? """ def _get_device_list_changes_in_rooms_txn( txn: LoggingTransaction, clause: str, args: List[Any], ) -> Set[str]: txn.execute(sql.format(clause=clause), args) return {user_id for user_id, in txn} changes = set() for chunk in batch_iter(room_ids, 1000): clause, args = make_in_list_sql_clause( self.database_engine, "room_id", chunk ) args.append(from_id) changes |= await self.db_pool.runInteraction( "get_device_list_changes_in_rooms", _get_device_list_changes_in_rooms_txn, clause, args, ) return changes async def get_device_list_changes_in_room( self, room_id: str, min_stream_id: int ) -> Collection[Tuple[str, str]]: """Get all device list changes that happened in the room since the given stream ID. Returns: Collection of user ID/device ID tuples of all devices that have changed """ sql = """ SELECT DISTINCT user_id, device_id FROM device_lists_changes_in_room WHERE room_id = ? AND stream_id > ? """ def get_device_list_changes_in_room_txn( txn: LoggingTransaction, ) -> Collection[Tuple[str, str]]: txn.execute(sql, (room_id, min_stream_id)) return cast(Collection[Tuple[str, str]], txn.fetchall()) return await self.db_pool.runInteraction( "get_device_list_changes_in_room", get_device_list_changes_in_room_txn, ) class DeviceBackgroundUpdateStore(SQLBaseStore): def __init__( self, database: DatabasePool, db_conn: LoggingDatabaseConnection, hs: "HomeServer", ): super().__init__(database, db_conn, hs) self.db_pool.updates.register_background_index_update( "device_lists_stream_idx", index_name="device_lists_stream_user_id", table="device_lists_stream", columns=["user_id", "device_id"], ) # create a unique index on device_lists_remote_cache self.db_pool.updates.register_background_index_update( "device_lists_remote_cache_unique_idx", index_name="device_lists_remote_cache_unique_id", table="device_lists_remote_cache", columns=["user_id", "device_id"], unique=True, ) # And one on device_lists_remote_extremeties self.db_pool.updates.register_background_index_update( "device_lists_remote_extremeties_unique_idx", index_name="device_lists_remote_extremeties_unique_idx", table="device_lists_remote_extremeties", columns=["user_id"], unique=True, ) # once they complete, we can remove the old non-unique indexes. self.db_pool.updates.register_background_update_handler( DROP_DEVICE_LIST_STREAMS_NON_UNIQUE_INDEXES, self._drop_device_list_streams_non_unique_indexes, ) # clear out duplicate device list outbound pokes self.db_pool.updates.register_background_update_handler( BG_UPDATE_REMOVE_DUP_OUTBOUND_POKES, self._remove_duplicate_outbound_pokes, ) self.db_pool.updates.register_background_index_update( "device_lists_changes_in_room_by_room_index", index_name="device_lists_changes_in_room_by_room_idx", table="device_lists_changes_in_room", columns=["room_id", "stream_id"], ) async def _drop_device_list_streams_non_unique_indexes( self, progress: JsonDict, batch_size: int ) -> int: def f(conn: LoggingDatabaseConnection) -> None: txn = conn.cursor() txn.execute("DROP INDEX IF EXISTS device_lists_remote_cache_id") txn.execute("DROP INDEX IF EXISTS device_lists_remote_extremeties_id") txn.close() await self.db_pool.runWithConnection(f) await self.db_pool.updates._end_background_update( DROP_DEVICE_LIST_STREAMS_NON_UNIQUE_INDEXES ) return 1 async def _remove_duplicate_outbound_pokes( self, progress: JsonDict, batch_size: int ) -> int: # for some reason, we have accumulated duplicate entries in # device_lists_outbound_pokes, which makes prune_outbound_device_list_pokes less # efficient. # # For each duplicate, we delete all the existing rows and put one back. KEY_COLS = ["stream_id", "destination", "user_id", "device_id"] last_row = progress.get( "last_row", {"stream_id": 0, "destination": "", "user_id": "", "device_id": ""}, ) def _txn(txn: LoggingTransaction) -> int: clause, args = make_tuple_comparison_clause( [(x, last_row[x]) for x in KEY_COLS] ) sql = """ SELECT stream_id, destination, user_id, device_id, MAX(ts) AS ts FROM device_lists_outbound_pokes WHERE %s GROUP BY %s HAVING count(*) > 1 ORDER BY %s LIMIT ? """ % ( clause, # WHERE ",".join(KEY_COLS), # GROUP BY ",".join(KEY_COLS), # ORDER BY ) txn.execute(sql, args + [batch_size]) rows = self.db_pool.cursor_to_dict(txn) row = None for row in rows: self.db_pool.simple_delete_txn( txn, "device_lists_outbound_pokes", {x: row[x] for x in KEY_COLS}, ) row["sent"] = False self.db_pool.simple_insert_txn( txn, "device_lists_outbound_pokes", row, ) if row: self.db_pool.updates._background_update_progress_txn( txn, BG_UPDATE_REMOVE_DUP_OUTBOUND_POKES, {"last_row": row}, ) return len(rows) rows = await self.db_pool.runInteraction( BG_UPDATE_REMOVE_DUP_OUTBOUND_POKES, _txn ) if not rows: await self.db_pool.updates._end_background_update( BG_UPDATE_REMOVE_DUP_OUTBOUND_POKES ) return rows class DeviceStore(DeviceWorkerStore, DeviceBackgroundUpdateStore): # Because we have write access, this will be a StreamIdGenerator # (see DeviceWorkerStore.__init__) _device_list_id_gen: AbstractStreamIdGenerator def __init__( self, database: DatabasePool, db_conn: LoggingDatabaseConnection, hs: "HomeServer", ): super().__init__(database, db_conn, hs) # Map of (user_id, device_id) -> bool. If there is an entry that implies # the device exists. self.device_id_exists_cache: LruCache[ Tuple[str, str], Literal[True] ] = LruCache(cache_name="device_id_exists", max_size=10000) async def store_device( self, user_id: str, device_id: str, initial_device_display_name: Optional[str], auth_provider_id: Optional[str] = None, auth_provider_session_id: Optional[str] = None, ) -> bool: """Ensure the given device is known; add it to the store if not Args: user_id: id of user associated with the device device_id: id of device initial_device_display_name: initial displayname of the device. Ignored if device exists. auth_provider_id: The SSO IdP the user used, if any. auth_provider_session_id: The session ID (sid) got from a OIDC login. Returns: Whether the device was inserted or an existing device existed with that ID. Raises: StoreError: if the device is already in use """ key = (user_id, device_id) if self.device_id_exists_cache.get(key, None): return False try: inserted = await self.db_pool.simple_upsert( "devices", keyvalues={ "user_id": user_id, "device_id": device_id, }, values={}, insertion_values={ "display_name": initial_device_display_name, "hidden": False, }, desc="store_device", ) if not inserted: # if the device already exists, check if it's a real device, or # if the device ID is reserved by something else hidden = await self.db_pool.simple_select_one_onecol( "devices", keyvalues={"user_id": user_id, "device_id": device_id}, retcol="hidden", ) if hidden: raise StoreError(400, "The device ID is in use", Codes.FORBIDDEN) if auth_provider_id and auth_provider_session_id: await self.db_pool.simple_insert( "device_auth_providers", values={ "user_id": user_id, "device_id": device_id, "auth_provider_id": auth_provider_id, "auth_provider_session_id": auth_provider_session_id, }, desc="store_device_auth_provider", ) self.device_id_exists_cache.set(key, True) return inserted except StoreError: raise except Exception as e: logger.error( "store_device with device_id=%s(%r) user_id=%s(%r)" " display_name=%s(%r) failed: %s", type(device_id).__name__, device_id, type(user_id).__name__, user_id, type(initial_device_display_name).__name__, initial_device_display_name, e, ) raise StoreError(500, "Problem storing device.") async def delete_devices(self, user_id: str, device_ids: List[str]) -> None: """Deletes several devices. Args: user_id: The ID of the user which owns the devices device_ids: The IDs of the devices to delete """ def _delete_devices_txn(txn: LoggingTransaction) -> None: self.db_pool.simple_delete_many_txn( txn, table="devices", column="device_id", values=device_ids, keyvalues={"user_id": user_id, "hidden": False}, ) self.db_pool.simple_delete_many_txn( txn, table="device_inbox", column="device_id", values=device_ids, keyvalues={"user_id": user_id}, ) self.db_pool.simple_delete_many_txn( txn, table="device_auth_providers", column="device_id", values=device_ids, keyvalues={"user_id": user_id}, ) await self.db_pool.runInteraction("delete_devices", _delete_devices_txn) for device_id in device_ids: self.device_id_exists_cache.invalidate((user_id, device_id)) async def update_device( self, user_id: str, device_id: str, new_display_name: Optional[str] = None ) -> None: """Update a device. Only updates the device if it is not marked as hidden. Args: user_id: The ID of the user which owns the device device_id: The ID of the device to update new_display_name: new displayname for device; None to leave unchanged Raises: StoreError: if the device is not found """ updates = {} if new_display_name is not None: updates["display_name"] = new_display_name if not updates: return None await self.db_pool.simple_update_one( table="devices", keyvalues={"user_id": user_id, "device_id": device_id, "hidden": False}, updatevalues=updates, desc="update_device", ) async def update_remote_device_list_cache_entry( self, user_id: str, device_id: str, content: JsonDict, stream_id: str ) -> None: """Updates a single device in the cache of a remote user's devicelist. Note: assumes that we are the only thread that can be updating this user's device list. Args: user_id: User to update device list for device_id: ID of decivice being updated content: new data on this device stream_id: the version of the device list """ await self.db_pool.runInteraction( "update_remote_device_list_cache_entry", self._update_remote_device_list_cache_entry_txn, user_id, device_id, content, stream_id, ) def _update_remote_device_list_cache_entry_txn( self, txn: LoggingTransaction, user_id: str, device_id: str, content: JsonDict, stream_id: str, ) -> None: """Delete, update or insert a cache entry for this (user, device) pair.""" if content.get("deleted"): self.db_pool.simple_delete_txn( txn, table="device_lists_remote_cache", keyvalues={"user_id": user_id, "device_id": device_id}, ) txn.call_after(self.device_id_exists_cache.invalidate, (user_id, device_id)) else: self.db_pool.simple_upsert_txn( txn, table="device_lists_remote_cache", keyvalues={"user_id": user_id, "device_id": device_id}, values={"content": json_encoder.encode(content)}, ) txn.call_after(self._get_cached_user_device.invalidate, (user_id, device_id)) txn.call_after(self.get_cached_devices_for_user.invalidate, (user_id,)) txn.call_after( self.get_device_list_last_stream_id_for_remote.invalidate, (user_id,) ) self.db_pool.simple_upsert_txn( txn, table="device_lists_remote_extremeties", keyvalues={"user_id": user_id}, values={"stream_id": stream_id}, ) async def update_remote_device_list_cache( self, user_id: str, devices: List[dict], stream_id: int ) -> None: """Replace the entire cache of the remote user's devices. Note: assumes that we are the only thread that can be updating this user's device list. Args: user_id: User to update device list for devices: list of device objects supplied over federation stream_id: the version of the device list """ await self.db_pool.runInteraction( "update_remote_device_list_cache", self._update_remote_device_list_cache_txn, user_id, devices, stream_id, ) def _update_remote_device_list_cache_txn( self, txn: LoggingTransaction, user_id: str, devices: List[dict], stream_id: int ) -> None: """Replace the list of cached devices for this user with the given list.""" self.db_pool.simple_delete_txn( txn, table="device_lists_remote_cache", keyvalues={"user_id": user_id} ) self.db_pool.simple_insert_many_txn( txn, table="device_lists_remote_cache", keys=("user_id", "device_id", "content"), values=[ (user_id, content["device_id"], json_encoder.encode(content)) for content in devices ], ) txn.call_after(self.get_cached_devices_for_user.invalidate, (user_id,)) txn.call_after(self._get_cached_user_device.invalidate, (user_id,)) txn.call_after( self.get_device_list_last_stream_id_for_remote.invalidate, (user_id,) ) self.db_pool.simple_upsert_txn( txn, table="device_lists_remote_extremeties", keyvalues={"user_id": user_id}, values={"stream_id": stream_id}, ) async def add_device_change_to_streams( self, user_id: str, device_ids: Collection[str], room_ids: Collection[str], ) -> Optional[int]: """Persist that a user's devices have been updated, and which hosts (if any) should be poked. Args: user_id: The ID of the user whose device changed. device_ids: The IDs of any changed devices. If empty, this function will return None. room_ids: The rooms that the user is in Returns: The maximum stream ID of device list updates that were added to the database, or None if no updates were added. """ if not device_ids: return None context = get_active_span_text_map() def add_device_changes_txn( txn: LoggingTransaction, stream_ids: List[int] ) -> None: self._add_device_change_to_stream_txn( txn, user_id, device_ids, stream_ids, ) self._add_device_outbound_room_poke_txn( txn, user_id, device_ids, room_ids, stream_ids, context, ) async with self._device_list_id_gen.get_next_mult( len(device_ids) ) as stream_ids: await self.db_pool.runInteraction( "add_device_change_to_stream", add_device_changes_txn, stream_ids, ) return stream_ids[-1] def _add_device_change_to_stream_txn( self, txn: LoggingTransaction, user_id: str, device_ids: Collection[str], stream_ids: List[int], ) -> None: txn.call_after( self._device_list_stream_cache.entity_has_changed, user_id, stream_ids[-1], ) min_stream_id = stream_ids[0] # Delete older entries in the table, as we really only care about # when the latest change happened. txn.execute_batch( """ DELETE FROM device_lists_stream WHERE user_id = ? AND device_id = ? AND stream_id < ? """, [(user_id, device_id, min_stream_id) for device_id in device_ids], ) self.db_pool.simple_insert_many_txn( txn, table="device_lists_stream", keys=("stream_id", "user_id", "device_id"), values=[ (stream_id, user_id, device_id) for stream_id, device_id in zip(stream_ids, device_ids) ], ) def _add_device_outbound_poke_to_stream_txn( self, txn: LoggingTransaction, user_id: str, device_id: str, hosts: Collection[str], stream_ids: List[int], context: Optional[Dict[str, str]], ) -> None: for host in hosts: txn.call_after( self._device_list_federation_stream_cache.entity_has_changed, host, stream_ids[-1], ) now = self._clock.time_msec() stream_id_iterator = iter(stream_ids) encoded_context = json_encoder.encode(context) mark_sent = not self.hs.is_mine_id(user_id) values = [ ( destination, next(stream_id_iterator), user_id, device_id, mark_sent, now, encoded_context if whitelisted_homeserver(destination) else "{}", ) for destination in hosts ] self.db_pool.simple_insert_many_txn( txn, table="device_lists_outbound_pokes", keys=( "destination", "stream_id", "user_id", "device_id", "sent", "ts", "opentracing_context", ), values=values, ) # debugging for https://github.com/matrix-org/synapse/issues/14251 if issue_8631_logger.isEnabledFor(logging.DEBUG): issue_8631_logger.debug( "Recorded outbound pokes for %s:%s with device stream ids %s", user_id, device_id, { stream_id: destination for (destination, stream_id, _, _, _, _, _) in values }, ) def _add_device_outbound_room_poke_txn( self, txn: LoggingTransaction, user_id: str, device_ids: Iterable[str], room_ids: Collection[str], stream_ids: List[int], context: Dict[str, str], ) -> None: """Record the user in the room has updated their device.""" encoded_context = json_encoder.encode(context) # The `device_lists_changes_in_room.stream_id` column matches the # corresponding `stream_id` of the update in the `device_lists_stream` # table, i.e. all rows persisted for the same device update will have # the same `stream_id` (but different room IDs). self.db_pool.simple_insert_many_txn( txn, table="device_lists_changes_in_room", keys=( "user_id", "device_id", "room_id", "stream_id", "converted_to_destinations", "opentracing_context", ), values=[ ( user_id, device_id, room_id, stream_id, # We only need to calculate outbound pokes for local users not self.hs.is_mine_id(user_id), encoded_context, ) for room_id in room_ids for device_id, stream_id in zip(device_ids, stream_ids) ], ) async def get_uncoverted_outbound_room_pokes( self, start_stream_id: int, start_room_id: str, limit: int = 10 ) -> List[Tuple[str, str, str, int, Optional[Dict[str, str]]]]: """Get device list changes by room that have not yet been handled and written to `device_lists_outbound_pokes`. Args: start_stream_id: Together with `start_room_id`, indicates the position after which to return device list changes. start_room_id: Together with `start_stream_id`, indicates the position after which to return device list changes. limit: The maximum number of device list changes to return. Returns: A list of user ID, device ID, room ID, stream ID and optional opentracing context, in order of ascending (stream ID, room ID). """ sql = """ SELECT user_id, device_id, room_id, stream_id, opentracing_context FROM device_lists_changes_in_room WHERE (stream_id, room_id) > (?, ?) AND stream_id <= ? AND NOT converted_to_destinations ORDER BY stream_id ASC, room_id ASC LIMIT ? """ def get_uncoverted_outbound_room_pokes_txn( txn: LoggingTransaction, ) -> List[Tuple[str, str, str, int, Optional[Dict[str, str]]]]: txn.execute( sql, ( start_stream_id, start_room_id, # Avoid returning rows if there may be uncommitted device list # changes with smaller stream IDs. self._device_list_id_gen.get_current_token(), limit, ), ) return [ ( user_id, device_id, room_id, stream_id, db_to_json(opentracing_context), ) for user_id, device_id, room_id, stream_id, opentracing_context in txn ] return await self.db_pool.runInteraction( "get_uncoverted_outbound_room_pokes", get_uncoverted_outbound_room_pokes_txn ) async def add_device_list_outbound_pokes( self, user_id: str, device_id: str, room_id: str, hosts: Collection[str], context: Optional[Dict[str, str]], ) -> None: """Queue the device update to be sent to the given set of hosts, calculated from the room ID. """ if not hosts: return def add_device_list_outbound_pokes_txn( txn: LoggingTransaction, stream_ids: List[int] ) -> None: self._add_device_outbound_poke_to_stream_txn( txn, user_id=user_id, device_id=device_id, hosts=hosts, stream_ids=stream_ids, context=context, ) async with self._device_list_id_gen.get_next_mult(len(hosts)) as stream_ids: return await self.db_pool.runInteraction( "add_device_list_outbound_pokes", add_device_list_outbound_pokes_txn, stream_ids, ) async def add_remote_device_list_to_pending( self, user_id: str, device_id: str ) -> None: """Add a device list update to the table tracking remote device list updates during partial joins. """ async with self._device_list_id_gen.get_next() as stream_id: await self.db_pool.simple_upsert( table="device_lists_remote_pending", keyvalues={ "user_id": user_id, "device_id": device_id, }, values={"stream_id": stream_id}, desc="add_remote_device_list_to_pending", ) async def get_pending_remote_device_list_updates_for_room( self, room_id: str ) -> Collection[Tuple[str, str]]: """Get the set of remote device list updates from the pending table for the room. """ min_device_stream_id = await self.db_pool.simple_select_one_onecol( table="partial_state_rooms", keyvalues={ "room_id": room_id, }, retcol="device_lists_stream_id", desc="get_pending_remote_device_list_updates_for_room_device", ) sql = """ SELECT user_id, device_id FROM device_lists_remote_pending AS d INNER JOIN current_state_events AS c ON type = 'm.room.member' AND state_key = user_id AND membership = 'join' WHERE room_id = ? AND stream_id > ? """ def get_pending_remote_device_list_updates_for_room_txn( txn: LoggingTransaction, ) -> Collection[Tuple[str, str]]: txn.execute(sql, (room_id, min_device_stream_id)) return cast(Collection[Tuple[str, str]], txn.fetchall()) return await self.db_pool.runInteraction( "get_pending_remote_device_list_updates_for_room", get_pending_remote_device_list_updates_for_room_txn, ) async def get_device_change_last_converted_pos(self) -> Tuple[int, str]: """ Get the position of the last row in `device_list_changes_in_room` that has been converted to `device_lists_outbound_pokes`. Rows with a strictly greater position where `converted_to_destinations` is `FALSE` have not been converted. """ row = await self.db_pool.simple_select_one( table="device_lists_changes_converted_stream_position", keyvalues={}, retcols=["stream_id", "room_id"], desc="get_device_change_last_converted_pos", ) return row["stream_id"], row["room_id"] async def set_device_change_last_converted_pos( self, stream_id: int, room_id: str, ) -> None: """ Set the position of the last row in `device_list_changes_in_room` that has been converted to `device_lists_outbound_pokes`. """ await self.db_pool.simple_update_one( table="device_lists_changes_converted_stream_position", keyvalues={}, updatevalues={"stream_id": stream_id, "room_id": room_id}, desc="set_device_change_last_converted_pos", )