diff options
Diffstat (limited to 'synapse/federation/federation_server.py')
| -rw-r--r-- | synapse/federation/federation_server.py | 162 |
1 files changed, 105 insertions, 57 deletions
diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py index 51e3fdea06..f00d59e701 100644 --- a/synapse/federation/federation_server.py +++ b/synapse/federation/federation_server.py @@ -12,14 +12,12 @@ # 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. - - from twisted.internet import defer from .federation_base import FederationBase from .units import Transaction, Edu -from synapse.util.async import Linearizer +from synapse.util import async from synapse.util.logutils import log_function from synapse.util.caches.response_cache import ResponseCache from synapse.events import FrozenEvent @@ -33,6 +31,9 @@ from synapse.crypto.event_signing import compute_event_signature import simplejson as json import logging +# when processing incoming transactions, we try to handle multiple rooms in +# parallel, up to this limit. +TRANSACTION_CONCURRENCY_LIMIT = 10 logger = logging.getLogger(__name__) @@ -52,7 +53,8 @@ class FederationServer(FederationBase): self.auth = hs.get_auth() - self._server_linearizer = Linearizer("fed_server") + self._server_linearizer = async.Linearizer("fed_server") + self._transaction_linearizer = async.Linearizer("fed_txn_handler") # We cache responses to state queries, as they take a while and often # come in waves. @@ -109,25 +111,41 @@ class FederationServer(FederationBase): @defer.inlineCallbacks @log_function def on_incoming_transaction(self, transaction_data): + # keep this as early as possible to make the calculated origin ts as + # accurate as possible. + request_time = self._clock.time_msec() + transaction = Transaction(**transaction_data) - received_pdus_counter.inc_by(len(transaction.pdus)) + if not transaction.transaction_id: + raise Exception("Transaction missing transaction_id") + if not transaction.origin: + raise Exception("Transaction missing origin") - for p in transaction.pdus: - if "unsigned" in p: - unsigned = p["unsigned"] - if "age" in unsigned: - p["age"] = unsigned["age"] - if "age" in p: - p["age_ts"] = int(self._clock.time_msec()) - int(p["age"]) - del p["age"] + logger.debug("[%s] Got transaction", transaction.transaction_id) - pdu_list = [ - self.event_from_pdu_json(p) for p in transaction.pdus - ] + # use a linearizer to ensure that we don't process the same transaction + # multiple times in parallel. + with (yield self._transaction_linearizer.queue( + (transaction.origin, transaction.transaction_id), + )): + result = yield self._handle_incoming_transaction( + transaction, request_time, + ) - logger.debug("[%s] Got transaction", transaction.transaction_id) + defer.returnValue(result) + + @defer.inlineCallbacks + def _handle_incoming_transaction(self, transaction, request_time): + """ Process an incoming transaction and return the HTTP response + + Args: + transaction (Transaction): incoming transaction + request_time (int): timestamp that the HTTP request arrived at + Returns: + Deferred[(int, object)]: http response code and body + """ response = yield self.transaction_actions.have_responded(transaction) if response: @@ -140,42 +158,50 @@ class FederationServer(FederationBase): logger.debug("[%s] Transaction is new", transaction.transaction_id) - results = [] - - for pdu in pdu_list: - # check that it's actually being sent from a valid destination to - # workaround bug #1753 in 0.18.5 and 0.18.6 - if transaction.origin != get_domain_from_id(pdu.event_id): - # We continue to accept join events from any server; this is - # necessary for the federation join dance to work correctly. - # (When we join over federation, the "helper" server is - # responsible for sending out the join event, rather than the - # origin. See bug #1893). - if not ( - pdu.type == 'm.room.member' and - pdu.content and - pdu.content.get("membership", None) == 'join' - ): - logger.info( - "Discarding PDU %s from invalid origin %s", - pdu.event_id, transaction.origin - ) - continue - else: - logger.info( - "Accepting join PDU %s from %s", - pdu.event_id, transaction.origin - ) + received_pdus_counter.inc_by(len(transaction.pdus)) - try: - yield self._handle_received_pdu(transaction.origin, pdu) - results.append({}) - except FederationError as e: - self.send_failure(e, transaction.origin) - results.append({"error": str(e)}) - except Exception as e: - results.append({"error": str(e)}) - logger.exception("Failed to handle PDU") + pdus_by_room = {} + + for p in transaction.pdus: + if "unsigned" in p: + unsigned = p["unsigned"] + if "age" in unsigned: + p["age"] = unsigned["age"] + if "age" in p: + p["age_ts"] = request_time - int(p["age"]) + del p["age"] + + event = self.event_from_pdu_json(p) + room_id = event.room_id + pdus_by_room.setdefault(room_id, []).append(event) + + pdu_results = {} + + # we can process different rooms in parallel (which is useful if they + # require callouts to other servers to fetch missing events), but + # impose a limit to avoid going too crazy with ram/cpu. + @defer.inlineCallbacks + def process_pdus_for_room(room_id): + logger.debug("Processing PDUs for %s", room_id) + for pdu in pdus_by_room[room_id]: + event_id = pdu.event_id + try: + yield self._handle_received_pdu( + transaction.origin, pdu + ) + pdu_results[event_id] = {} + except FederationError as e: + logger.warn("Error handling PDU %s: %s", event_id, e) + self.send_failure(e, transaction.origin) + pdu_results[event_id] = {"error": str(e)} + except Exception as e: + pdu_results[event_id] = {"error": str(e)} + logger.exception("Failed to handle PDU %s", event_id) + + yield async.concurrently_execute( + process_pdus_for_room, pdus_by_room.keys(), + TRANSACTION_CONCURRENCY_LIMIT, + ) if hasattr(transaction, "edus"): for edu in (Edu(**x) for x in transaction.edus): @@ -188,14 +214,12 @@ class FederationServer(FederationBase): for failure in getattr(transaction, "pdu_failures", []): logger.info("Got failure %r", failure) - logger.debug("Returning: %s", str(results)) - response = { - "pdus": dict(zip( - (p.event_id for p in pdu_list), results - )), + "pdus": pdu_results, } + logger.debug("Returning: %s", str(response)) + yield self.transaction_actions.set_response( transaction, 200, response @@ -520,6 +544,30 @@ class FederationServer(FederationBase): Returns (Deferred): completes with None Raises: FederationError if the signatures / hash do not match """ + # check that it's actually being sent from a valid destination to + # workaround bug #1753 in 0.18.5 and 0.18.6 + if origin != get_domain_from_id(pdu.event_id): + # We continue to accept join events from any server; this is + # necessary for the federation join dance to work correctly. + # (When we join over federation, the "helper" server is + # responsible for sending out the join event, rather than the + # origin. See bug #1893). + if not ( + pdu.type == 'm.room.member' and + pdu.content and + pdu.content.get("membership", None) == 'join' + ): + logger.info( + "Discarding PDU %s from invalid origin %s", + pdu.event_id, origin + ) + return + else: + logger.info( + "Accepting join PDU %s from %s", + pdu.event_id, origin + ) + # Check signature. try: pdu = yield self._check_sigs_and_hash(pdu) |