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-rw-r--r--synapse/federation/transaction_queue.py24
-rw-r--r--synapse/handlers/device.py65
-rw-r--r--synapse/handlers/e2e_keys.py1
-rw-r--r--synapse/handlers/sync.py13
-rw-r--r--synapse/rest/client/v2_alpha/sync.py6
-rw-r--r--synapse/storage/__init__.py11
-rw-r--r--synapse/storage/_base.py6
-rw-r--r--synapse/storage/devices.py169
-rw-r--r--synapse/storage/end_to_end_keys.py23
-rw-r--r--synapse/storage/schema/delta/40/device_list_streams.sql56
-rw-r--r--synapse/streams/events.py4
-rw-r--r--synapse/types.py2
12 files changed, 343 insertions, 37 deletions
diff --git a/synapse/federation/transaction_queue.py b/synapse/federation/transaction_queue.py
index 6b3a7abb9e..65c6673a87 100644
--- a/synapse/federation/transaction_queue.py
+++ b/synapse/federation/transaction_queue.py
@@ -100,6 +100,7 @@ class TransactionQueue(object):
         self.pending_failures_by_dest = {}
 
         self.last_device_stream_id_by_dest = {}
+        self.last_device_list_stream_id_by_dest = {}
 
         # HACK to get unique tx id
         self._next_txn_id = int(self.clock.time_msec())
@@ -356,7 +357,7 @@ class TransactionQueue(object):
                     success = yield self._send_new_transaction(
                         destination, pending_pdus, pending_edus, pending_failures,
                         device_stream_id,
-                        should_delete_from_device_stream=bool(device_message_edus),
+                        includes_device_messages=bool(device_message_edus),
                         limiter=limiter,
                     )
                     if not success:
@@ -373,6 +374,8 @@ class TransactionQueue(object):
 
     @defer.inlineCallbacks
     def _get_new_device_messages(self, destination):
+        # TODO: Send appropriate device list messages
+
         last_device_stream_id = self.last_device_stream_id_by_dest.get(destination, 0)
         to_device_stream_id = self.store.get_to_device_stream_token()
         contents, stream_id = yield self.store.get_new_device_msgs_for_remote(
@@ -387,13 +390,27 @@ class TransactionQueue(object):
             )
             for content in contents
         ]
+
+        last_device_list = self.last_device_list_stream_id_by_dest.get(destination, 0)
+        now_stream_id, results = yield self.store.get_devices_by_remote(
+            destination, last_device_list
+        )
+        edus.extend(
+            Edu(
+                origin=self.server_name,
+                destination=destination,
+                edu_type="m.device_list_update",
+                content=content,
+            )
+            for content in results
+        )
         defer.returnValue((edus, stream_id))
 
     @measure_func("_send_new_transaction")
     @defer.inlineCallbacks
     def _send_new_transaction(self, destination, pending_pdus, pending_edus,
                               pending_failures, device_stream_id,
-                              should_delete_from_device_stream, limiter):
+                              includes_device_messages, limiter):
 
         # Sort based on the order field
         pending_pdus.sort(key=lambda t: t[1])
@@ -506,7 +523,8 @@ class TransactionQueue(object):
                 success = False
             else:
                 # Remove the acknowledged device messages from the database
-                if should_delete_from_device_stream:
+                # Only bother if we actually sent some device messages
+                if includes_device_messages:
                     yield self.store.delete_device_msgs_for_remote(
                         destination, device_stream_id
                     )
diff --git a/synapse/handlers/device.py b/synapse/handlers/device.py
index aa68755936..d92780b642 100644
--- a/synapse/handlers/device.py
+++ b/synapse/handlers/device.py
@@ -15,6 +15,7 @@
 
 from synapse.api import errors
 from synapse.util import stringutils
+from synapse.types import get_domain_from_id
 from twisted.internet import defer
 from ._base import BaseHandler
 
@@ -27,6 +28,8 @@ class DeviceHandler(BaseHandler):
     def __init__(self, hs):
         super(DeviceHandler, self).__init__(hs)
 
+        self.state = hs.get_state_handler()
+
     @defer.inlineCallbacks
     def check_device_registered(self, user_id, device_id,
                                 initial_device_display_name=None):
@@ -45,29 +48,29 @@ class DeviceHandler(BaseHandler):
             str: device id (generated if none was supplied)
         """
         if device_id is not None:
-            yield self.store.store_device(
+            new_device = yield self.store.store_device(
                 user_id=user_id,
                 device_id=device_id,
                 initial_device_display_name=initial_device_display_name,
-                ignore_if_known=True,
             )
+            if new_device:
+                yield self.notify_device_update(user_id, device_id)
             defer.returnValue(device_id)
 
         # if the device id is not specified, we'll autogen one, but loop a few
         # times in case of a clash.
         attempts = 0
         while attempts < 5:
-            try:
-                device_id = stringutils.random_string(10).upper()
-                yield self.store.store_device(
-                    user_id=user_id,
-                    device_id=device_id,
-                    initial_device_display_name=initial_device_display_name,
-                    ignore_if_known=False,
-                )
+            device_id = stringutils.random_string(10).upper()
+            new_device = yield self.store.store_device(
+                user_id=user_id,
+                device_id=device_id,
+                initial_device_display_name=initial_device_display_name,
+            )
+            if new_device:
+                yield self.notify_device_update(user_id, device_id)
                 defer.returnValue(device_id)
-            except errors.StoreError:
-                attempts += 1
+            attempts += 1
 
         raise errors.StoreError(500, "Couldn't generate a device ID.")
 
@@ -147,6 +150,8 @@ class DeviceHandler(BaseHandler):
             user_id=user_id, device_id=device_id
         )
 
+        yield self.notify_device_update(user_id, device_id)
+
     @defer.inlineCallbacks
     def update_device(self, user_id, device_id, content):
         """ Update the given device
@@ -166,12 +171,48 @@ class DeviceHandler(BaseHandler):
                 device_id,
                 new_display_name=content.get("display_name")
             )
+            yield self.notify_device_update(user_id, device_id)
         except errors.StoreError, e:
             if e.code == 404:
                 raise errors.NotFoundError()
             else:
                 raise
 
+    @defer.inlineCallbacks
+    def notify_device_update(self, user_id, device_id):
+        rooms = yield self.store.get_rooms_for_user(user_id)
+        room_ids = [r.room_id for r in rooms]
+
+        hosts = set()
+        for room_id in room_ids:
+            users = yield self.state.get_current_user_in_room(room_id)
+            hosts.update(get_domain_from_id(u) for u in users)
+        hosts.discard(self.server_name)
+
+        position = yield self.store.add_device_change_to_streams(
+            user_id, device_id, list(hosts)
+        )
+
+        yield self.notifier.on_new_event(
+            "device_list_key", position, rooms=room_ids,
+        )
+
+        for host in hosts:
+            self.federation.send_device_messages(host)
+
+    @defer.inlineCallbacks
+    def get_device_list_changes(self, user_id, room_ids, from_key):
+        room_ids = frozenset(room_ids)
+
+        user_ids_changed = set()
+        changed = yield self.store.get_user_whose_devices_changed(from_key)
+        for other_user_id in changed:
+            other_rooms = yield self.store.get_rooms_for_user(other_user_id)
+            if room_ids.intersection(e.room_id for e in other_rooms):
+                user_ids_changed.add(other_user_id)
+
+        defer.returnValue(user_ids_changed)
+
 
 def _update_device_from_client_ips(device, client_ips):
     ip = client_ips.get((device["user_id"], device["device_id"]), {})
diff --git a/synapse/handlers/e2e_keys.py b/synapse/handlers/e2e_keys.py
index b63a660c06..38c2a2d39e 100644
--- a/synapse/handlers/e2e_keys.py
+++ b/synapse/handlers/e2e_keys.py
@@ -259,6 +259,7 @@ class E2eKeysHandler(object):
                 user_id, device_id, time_now,
                 encode_canonical_json(device_keys)
             )
+            yield self.device_handler.notify_device_update(user_id, device_id)
 
         one_time_keys = keys.get("one_time_keys", None)
         if one_time_keys:
diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py
index c880f61685..06bf626367 100644
--- a/synapse/handlers/sync.py
+++ b/synapse/handlers/sync.py
@@ -115,6 +115,7 @@ class SyncResult(collections.namedtuple("SyncResult", [
     "invited",  # InvitedSyncResult for each invited room.
     "archived",  # ArchivedSyncResult for each archived room.
     "to_device",  # List of direct messages for the device.
+    "device_lists",  # List of user_ids whose devices have chanegd
 ])):
     __slots__ = []
 
@@ -143,6 +144,7 @@ class SyncHandler(object):
         self.clock = hs.get_clock()
         self.response_cache = ResponseCache(hs)
         self.state = hs.get_state_handler()
+        self.device_handler = hs.get_device_handler()
 
     def wait_for_sync_for_user(self, sync_config, since_token=None, timeout=0,
                                full_state=False):
@@ -544,6 +546,16 @@ class SyncHandler(object):
 
         yield self._generate_sync_entry_for_to_device(sync_result_builder)
 
+        if since_token and since_token.device_list_key:
+            user_id = sync_config.user.to_string()
+            rooms = yield self.store.get_rooms_for_user(user_id)
+            joined_room_ids = set(r.room_id for r in rooms)
+            device_lists = yield self.device_handler.get_device_list_changes(
+                user_id, joined_room_ids, since_token.device_list_key
+            )
+        else:
+            device_lists = []
+
         defer.returnValue(SyncResult(
             presence=sync_result_builder.presence,
             account_data=sync_result_builder.account_data,
@@ -551,6 +563,7 @@ class SyncHandler(object):
             invited=sync_result_builder.invited,
             archived=sync_result_builder.archived,
             to_device=sync_result_builder.to_device,
+            device_lists=device_lists,
             next_batch=sync_result_builder.now_token,
         ))
 
diff --git a/synapse/rest/client/v2_alpha/sync.py b/synapse/rest/client/v2_alpha/sync.py
index 7199ec883a..b3d8001638 100644
--- a/synapse/rest/client/v2_alpha/sync.py
+++ b/synapse/rest/client/v2_alpha/sync.py
@@ -170,12 +170,16 @@ class SyncRestServlet(RestServlet):
         )
 
         archived = self.encode_archived(
-            sync_result.archived, time_now, requester.access_token_id, filter.event_fields
+            sync_result.archived, time_now, requester.access_token_id,
+            filter.event_fields,
         )
 
         response_content = {
             "account_data": {"events": sync_result.account_data},
             "to_device": {"events": sync_result.to_device},
+            "device_lists": {
+                "changed": list(sync_result.device_lists),
+            },
             "presence": self.encode_presence(
                 sync_result.presence, time_now
             ),
diff --git a/synapse/storage/__init__.py b/synapse/storage/__init__.py
index e8495f1eb9..b9968debe5 100644
--- a/synapse/storage/__init__.py
+++ b/synapse/storage/__init__.py
@@ -116,6 +116,9 @@ class DataStore(RoomMemberStore, RoomStore,
         self._public_room_id_gen = StreamIdGenerator(
             db_conn, "public_room_list_stream", "stream_id"
         )
+        self._device_list_id_gen = StreamIdGenerator(
+            db_conn, "device_lists_stream", "stream_id",
+        )
 
         self._transaction_id_gen = IdGenerator(db_conn, "sent_transactions", "id")
         self._state_groups_id_gen = IdGenerator(db_conn, "state_groups", "id")
@@ -210,6 +213,14 @@ class DataStore(RoomMemberStore, RoomStore,
             prefilled_cache=device_outbox_prefill,
         )
 
+        device_list_max = self._device_list_id_gen.get_current_token()
+        self._device_list_stream_cache = StreamChangeCache(
+            "DeviceListStreamChangeCache", device_list_max,
+        )
+        self._device_list_federation_stream_cache = StreamChangeCache(
+            "DeviceListFederationStreamChangeCache", device_list_max,
+        )
+
         cur = LoggingTransaction(
             db_conn.cursor(),
             name="_find_stream_orderings_for_times_txn",
diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index 963ef999d5..05374682fd 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -387,6 +387,10 @@ class SQLBaseStore(object):
         Args:
             table : string giving the table name
             values : dict of new column names and values for them
+
+        Returns:
+            bool: Whether the row was inserted or not. Only useful when
+            `or_ignore` is True
         """
         try:
             yield self.runInteraction(
@@ -398,6 +402,8 @@ class SQLBaseStore(object):
             # a cursor after we receive an error from the db.
             if not or_ignore:
                 raise
+            defer.returnValue(False)
+        defer.returnValue(True)
 
     @staticmethod
     def _simple_insert_txn(txn, table, values):
diff --git a/synapse/storage/devices.py b/synapse/storage/devices.py
index 17920d4480..b594f501f9 100644
--- a/synapse/storage/devices.py
+++ b/synapse/storage/devices.py
@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import logging
+import ujson as json
 
 from twisted.internet import defer
 
@@ -33,17 +34,13 @@ class DeviceStore(SQLBaseStore):
             user_id (str): id of user associated with the device
             device_id (str): id of device
             initial_device_display_name (str): initial displayname of the
-               device
-            ignore_if_known (bool): ignore integrity errors which mean the
-               device is already known
+               device. Ignored if device exists.
         Returns:
-            defer.Deferred
-        Raises:
-            StoreError: if ignore_if_known is False and the device was already
-               known
+            defer.Deferred: boolean whether the device was inserted or an
+                existing device existed with that ID.
         """
         try:
-            yield self._simple_insert(
+            inserted = yield self._simple_insert(
                 "devices",
                 values={
                     "user_id": user_id,
@@ -51,8 +48,9 @@ class DeviceStore(SQLBaseStore):
                     "display_name": initial_device_display_name
                 },
                 desc="store_device",
-                or_ignore=ignore_if_known,
+                or_ignore=True,
             )
+            defer.returnValue(inserted)
         except Exception as e:
             logger.error("store_device with device_id=%s(%r) user_id=%s(%r)"
                          " display_name=%s(%r) failed: %s",
@@ -139,3 +137,156 @@ class DeviceStore(SQLBaseStore):
         )
 
         defer.returnValue({d["device_id"]: d for d in devices})
+
+    def get_devices_by_remote(self, destination, from_stream_id):
+        now_stream_id = self._device_list_id_gen.get_current_token()
+
+        has_changed = self._device_list_stream_cache.has_entity_changed(
+            destination, int(from_stream_id)
+        )
+        if not has_changed:
+            defer.returnValue((now_stream_id, []))
+
+        return self.runInteraction(
+            "get_devices_by_remote", self._get_devices_by_remote_txn,
+            destination, from_stream_id, now_stream_id,
+        )
+
+    def _get_devices_by_remote_txn(self, txn, destination, from_stream_id,
+                                   now_stream_id):
+        sql = """
+            SELECT user_id, device_id, max(stream_id) FROM device_lists_outbound_pokes
+            WHERE destination = ? AND stream_id > ? AND stream_id <= ? AND sent = ?
+            GROUP BY user_id, device_id
+        """
+        txn.execute(
+            sql, (destination, from_stream_id, now_stream_id, False)
+        )
+        rows = txn.fetchall()
+
+        if not rows:
+            return now_stream_id, []
+
+        # maps (user_id, device_id) -> stream_id
+        query_map = {(r[0], r[1]): r[2] for r in rows}
+        devices = self._get_e2e_device_keys_txn(
+            txn, query_map.keys(), include_all_devices=True
+        )
+
+        prev_sent_id_sql = """
+            SELECT coalesce(max(stream_id), 0) as stream_id
+            FROM device_lists_outbound_pokes
+            WHERE destination = ? AND user_id = ? AND sent = ?
+        """
+
+        results = []
+        for user_id, user_devices in devices.iteritems():
+            txn.execute(prev_sent_id_sql, (destination, user_id, True))
+            rows = txn.fetchall()
+            prev_id = rows[0][0]
+            for device_id, result in user_devices.iteritems():
+                stream_id = query_map[(user_id, device_id)]
+                result = {
+                    "user_id": user_id,
+                    "device_id": device_id,
+                    "prev_id": prev_id,
+                    "stream_id": stream_id,
+                }
+
+                prev_id = stream_id
+
+                key_json = result.get("key_json", None)
+                if key_json:
+                    result["keys"] = json.loads(key_json)
+                device_display_name = result.get("device_display_name", None)
+                if device_display_name:
+                    result["device_display_name"] = device_display_name
+
+                results.setdefault(user_id, {})[device_id] = result
+
+        return now_stream_id, results
+
+    def mark_as_sent_devices_by_remote(self, destination, stream_id):
+        return self.runInteraction(
+            "mark_as_sent_devices_by_remote", self._mark_as_sent_devices_by_remote_txn,
+            destination, stream_id,
+        )
+
+    @defer.inlineCallbacks
+    def get_user_whose_devices_changed(self, from_key):
+        from_key = int(from_key)
+        changed = self._device_list_stream_cache.get_all_entities_changed(from_key)
+        if changed is not None:
+            defer.returnValue(set(changed))
+
+        sql = """
+            SELECT user_id FROM device_lists_stream WHERE stream_id > ?
+        """
+        rows = yield self._execute("get_user_whose_devices_changed", None, sql, from_key)
+        defer.returnValue(set(row["user_id"] for row in rows))
+
+    def _mark_as_sent_devices_by_remote_txn(self, txn, destination, stream_id):
+        sql = """
+            DELETE FROM device_lists_outbound_pokes
+            WHERE destination = ? AND stream_id < (
+                SELECT coalesce(max(stream_id), 0) FROM device_lists_outbound_pokes
+                WHERE destination = ? AND stream_id <= ?
+            )
+        """
+        txn.execute(sql, (destination, destination, stream_id,))
+
+        sql = """
+            UPDATE device_lists_outbound_pokes SET sent = ?
+            WHERE destination = ? AND stream_id <= ?
+        """
+        txn.execute(sql, (destination, True,))
+
+    @defer.inlineCallbacks
+    def add_device_change_to_streams(self, user_id, device_id, hosts):
+        # device_lists_stream
+        # device_lists_outbound_pokes
+        with self._device_list_id_gen.get_next() as stream_id:
+            yield self.runInteraction(
+                "add_device_change_to_streams", self._add_device_change_txn,
+                user_id, device_id, hosts, stream_id,
+            )
+        defer.returnValue(stream_id)
+
+    def _add_device_change_txn(self, txn, user_id, device_id, hosts, stream_id):
+        txn.call_after(
+            self._device_list_stream_cache.entity_has_changed,
+            user_id, stream_id,
+        )
+        for host in hosts:
+            txn.call_after(
+                self._device_list_federation_stream_cache.entity_has_changed,
+                host, stream_id,
+            )
+
+        self._simple_insert_txn(
+            txn,
+            table="device_lists_stream",
+            values={
+                "stream_id": stream_id,
+                "user_id": user_id,
+                "device_id": device_id,
+            }
+        )
+
+        self._simple_insert_many_txn(
+            txn,
+            table="device_lists_outbound_pokes",
+            values=[
+                {
+                    "destination": destination,
+                    "stream_id": stream_id,
+                    "user_id": user_id,
+                    "device_id": device_id,
+                    "sent": False,
+                }
+                for destination in hosts
+            ]
+        )
+
+    def get_device_stream_token(self):
+        return self._device_list_id_gen.get_current_token()
diff --git a/synapse/storage/end_to_end_keys.py b/synapse/storage/end_to_end_keys.py
index 385d607056..f82943a7a8 100644
--- a/synapse/storage/end_to_end_keys.py
+++ b/synapse/storage/end_to_end_keys.py
@@ -12,9 +12,7 @@
 # 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 collections
-
-import twisted.internet.defer
+from twisted.internet import defer
 
 from ._base import SQLBaseStore
 
@@ -33,7 +31,7 @@ class EndToEndKeyStore(SQLBaseStore):
             }
         )
 
-    def get_e2e_device_keys(self, query_list):
+    def get_e2e_device_keys(self, query_list, include_all_devices=False):
         """Fetch a list of device keys.
         Args:
             query_list(list): List of pairs of user_ids and device_ids.
@@ -45,10 +43,11 @@ class EndToEndKeyStore(SQLBaseStore):
             return {}
 
         return self.runInteraction(
-            "get_e2e_device_keys", self._get_e2e_device_keys_txn, query_list
+            "get_e2e_device_keys", self._get_e2e_device_keys_txn,
+            query_list, include_all_devices,
         )
 
-    def _get_e2e_device_keys_txn(self, txn, query_list):
+    def _get_e2e_device_keys_txn(self, txn, query_list, include_all_devices):
         query_clauses = []
         query_params = []
 
@@ -63,23 +62,23 @@ class EndToEndKeyStore(SQLBaseStore):
             query_clauses.append(query_clause)
 
         sql = (
-            "SELECT k.user_id, k.device_id, "
+            "SELECT user_id, device_id, "
             "    d.display_name AS device_display_name, "
             "    k.key_json"
             " FROM e2e_device_keys_json k"
-            "    LEFT JOIN devices d ON d.user_id = k.user_id"
-            "      AND d.device_id = k.device_id"
+            "    %s JOIN devices d USING (user_id, device_id)"
             " WHERE %s"
         ) % (
+            "FULL OUTER" if include_all_devices else "LEFT",
             " OR ".join("(" + q + ")" for q in query_clauses)
         )
 
         txn.execute(sql, query_params)
         rows = self.cursor_to_dict(txn)
 
-        result = collections.defaultdict(dict)
+        result = {}
         for row in rows:
-            result[row["user_id"]][row["device_id"]] = row
+            result.setdefault(row["user_id"], {})[row["device_id"]] = row
 
         return result
 
@@ -152,7 +151,7 @@ class EndToEndKeyStore(SQLBaseStore):
             "claim_e2e_one_time_keys", _claim_e2e_one_time_keys
         )
 
-    @twisted.internet.defer.inlineCallbacks
+    @defer.inlineCallbacks
     def delete_e2e_keys_by_device(self, user_id, device_id):
         yield self._simple_delete(
             table="e2e_device_keys_json",
diff --git a/synapse/storage/schema/delta/40/device_list_streams.sql b/synapse/storage/schema/delta/40/device_list_streams.sql
new file mode 100644
index 0000000000..61cac63bbb
--- /dev/null
+++ b/synapse/storage/schema/delta/40/device_list_streams.sql
@@ -0,0 +1,56 @@
+/* Copyright 2017 OpenMarket Ltd
+ *
+ * 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.
+ */
+
+CREATE TABLE device_list_streams_remote (
+    list_id TEXT NOT NULL,
+    origin TEXT NOT NULL,
+    user_id TEXT NOT NULL,
+    is_full BOOLEAN NOT NULL,
+    ts BIGINT NOT NULL
+);
+
+CREATE INDEX device_list_streams_remote_id_origin ON device_list_streams_remote(
+    origin, list_id, user_id
+);
+
+
+CREATE TABLE device_lists_remote_cache (
+    user_id TEXT NOT NULL,
+    device_id TEXT NOT NULL,
+    content TEXT NOT NULL
+);
+
+CREATE INDEX device_lists_remote_cache_id ON device_lists_remote_cache(user_id, device_id);
+
+
+CREATE TABLE device_lists_stream (
+    stream_id BIGINT NOT NULL,
+    user_id TEXT NOT NULL,
+    device_id TEXT NOT NULL
+);
+
+CREATE INDEX device_lists_stream_id ON device_lists_stream(stream_id, user_id);
+
+
+CREATE TABLE device_lists_outbound_pokes (
+    destination TEXT NOT NULL,
+    stream_id BIGINT NOT NULL,
+    user_id TEXT NOT NULL,
+    device_id TEXT NOT NULL,
+    sent BOOLEAN NOT NULL
+);
+
+CREATE INDEX device_lists_outbound_pokes_id ON device_lists_outbound_pokes(destination, stream_id);
+CREATE INDEX device_lists_outbound_pokes_user ON device_lists_outbound_pokes(destination, user_id);
diff --git a/synapse/streams/events.py b/synapse/streams/events.py
index 4d44c3d4ca..91a59b0bae 100644
--- a/synapse/streams/events.py
+++ b/synapse/streams/events.py
@@ -44,6 +44,7 @@ class EventSources(object):
     def get_current_token(self):
         push_rules_key, _ = self.store.get_push_rules_stream_token()
         to_device_key = self.store.get_to_device_stream_token()
+        device_list_key = self.store.get_device_stream_token()
 
         token = StreamToken(
             room_key=(
@@ -63,6 +64,7 @@ class EventSources(object):
             ),
             push_rules_key=push_rules_key,
             to_device_key=to_device_key,
+            device_list_key=device_list_key,
         )
         defer.returnValue(token)
 
@@ -70,6 +72,7 @@ class EventSources(object):
     def get_current_token_for_room(self, room_id):
         push_rules_key, _ = self.store.get_push_rules_stream_token()
         to_device_key = self.store.get_to_device_stream_token()
+        device_list_key = self.store.get_device_stream_token()
 
         token = StreamToken(
             room_key=(
@@ -89,5 +92,6 @@ class EventSources(object):
             ),
             push_rules_key=push_rules_key,
             to_device_key=to_device_key,
+            device_list_key=device_list_key,
         )
         defer.returnValue(token)
diff --git a/synapse/types.py b/synapse/types.py
index 3a3ab21d17..9666f9d73f 100644
--- a/synapse/types.py
+++ b/synapse/types.py
@@ -158,6 +158,7 @@ class StreamToken(
         "account_data_key",
         "push_rules_key",
         "to_device_key",
+        "device_list_key",
     ))
 ):
     _SEPARATOR = "_"
@@ -195,6 +196,7 @@ class StreamToken(
             or (int(other.account_data_key) < int(self.account_data_key))
             or (int(other.push_rules_key) < int(self.push_rules_key))
             or (int(other.to_device_key) < int(self.to_device_key))
+            or (int(other.device_list_key) < int(self.device_list_key))
         )
 
     def copy_and_advance(self, key, new_value):