Bug 1929818 - add Glean metric for QUIC frame count r=kershaw,necko-reviewers

Add a Glean metric counting the number of QUIC frames, labeled by frame type.

This is e.g. helpful to measure the impact of [stream receive window
auto-tuning](https://github.com/mozilla/neqo/issues/733), looking at the number
of max_stream_data frames sent and stream_data_blocked frames received.

Differential Revision: https://phabricator.services.mozilla.com/D228295

netwerk/metrics.yaml

@@ -1193,6 +1193,67 @@ networking:
       - VersionNegotiation
       - WrongRole
 
+  http_3_quic_frame_count:
+    type: labeled_counter
+    description: >
+      Number of QUIC frames send and received by type.
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1929818
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1929818
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - necko@mozilla.com
+      - minden@mozilla.com
+    expires: never
+    labels:
+      - ack_tx
+      - ack_rx
+      - crypto_tx
+      - crypto_rx
+      - stream_tx
+      - stream_rx
+      - reset_stream_tx
+      - reset_stream_rx
+      - stop_sending_tx
+      - stop_sending_rx
+      - ping_tx
+      - ping_rx
+      - padding_tx
+      - padding_rx
+      - max_streams_tx
+      - max_streams_rx
+      - streams_blocked_tx
+      - streams_blocked_rx
+      - max_data_tx
+      - max_data_rx
+      - data_blocked_tx
+      - data_blocked_rx
+      - max_stream_data_tx
+      - max_stream_data_rx
+      - stream_data_blocked_tx
+      - stream_data_blocked_rx
+      - new_connection_id_tx
+      - new_connection_id_rx
+      - retire_connection_id_tx
+      - retire_connection_id_rx
+      - path_challenge_tx
+      - path_challenge_rx
+      - path_response_tx
+      - path_response_rx
+      - connection_close_tx
+      - connection_close_rx
+      - handshake_done_tx
+      - handshake_done_rx
+      - new_token_tx
+      - new_token_rx
+      - ack_frequency_tx
+      - ack_frequency_rx
+      - datagram_tx
+      - datagram_rx
+
+
   cache_metadata_first_read_time: &cache_metadata_first_read_time
     type: timing_distribution
     time_unit: millisecond

netwerk/socket/neqo_glue/src/lib.rs

@@ -352,6 +352,37 @@ impl NeqoHttp3Conn {
             return;
         }
 
+        for (s, postfix) in [(stats.frame_tx, "_tx"), (stats.frame_rx, "_rx")] {
+            let add = |label: &str, value: usize| {
+                glean::http_3_quic_frame_count
+                    .get(&(label.to_string() + postfix))
+                    .add(value.try_into().unwrap_or(i32::MAX));
+            };
+
+            add("ack", s.ack);
+            add("crypto", s.crypto);
+            add("stream", s.stream);
+            add("reset_stream", s.reset_stream);
+            add("stop_sending", s.stop_sending);
+            add("ping", s.ping);
+            add("padding", s.padding);
+            add("max_streams", s.max_streams);
+            add("streams_blocked", s.streams_blocked);
+            add("max_data", s.max_data);
+            add("data_blocked", s.data_blocked);
+            add("max_stream_data", s.max_stream_data);
+            add("stream_data_blocked", s.stream_data_blocked);
+            add("new_connection_id", s.new_connection_id);
+            add("retire_connection_id", s.retire_connection_id);
+            add("path_challenge", s.path_challenge);
+            add("path_response", s.path_response);
+            add("connection_close", s.connection_close);
+            add("handshake_done", s.handshake_done);
+            add("new_token", s.new_token);
+            add("ack_frequency", s.ack_frequency);
+            add("datagram", s.datagram);
+        }
+
         if static_prefs::pref!("network.http.http3.ecn") {
             if stats.ecn_tx[IpTosEcn::Ect0] > 0 {
                 let ratio =