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-rw-r--r--synapse/handlers/devicemessage.py27
1 files changed, 21 insertions, 6 deletions
diff --git a/synapse/handlers/devicemessage.py b/synapse/handlers/devicemessage.py
index e1ebb6346c..c7d56779b8 100644
--- a/synapse/handlers/devicemessage.py
+++ b/synapse/handlers/devicemessage.py
@@ -15,9 +15,17 @@
 
 import logging
 
+from canonicaljson import json
+
 from twisted.internet import defer
 
 from synapse.api.errors import SynapseError
+from synapse.logging.opentracing import (
+    get_active_span_text_map,
+    set_tag,
+    start_active_span,
+    whitelisted_homeserver,
+)
 from synapse.types import UserID, get_domain_from_id
 from synapse.util.stringutils import random_string
 
@@ -100,14 +108,21 @@ class DeviceMessageHandler(object):
 
         message_id = random_string(16)
 
+        context = get_active_span_text_map()
+
         remote_edu_contents = {}
         for destination, messages in remote_messages.items():
-            remote_edu_contents[destination] = {
-                "messages": messages,
-                "sender": sender_user_id,
-                "type": message_type,
-                "message_id": message_id,
-            }
+            with start_active_span("to_device_for_user"):
+                set_tag("destination", destination)
+                remote_edu_contents[destination] = {
+                    "messages": messages,
+                    "sender": sender_user_id,
+                    "type": message_type,
+                    "message_id": message_id,
+                    "org.matrix.opentracing_context": json.dumps(context)
+                    if whitelisted_homeserver(destination)
+                    else None,
+                }
 
         stream_id = yield self.store.add_messages_to_device_inbox(
             local_messages, remote_edu_contents