quic: optionally leave timed out conns allocated

free pkt_meta when conn freed

Author: akhinvasara-jumptrading

book/api/metrics-generated.md

@@ -113,10 +113,13 @@
 | <span class="metrics-name">quic_&#8203;connections_&#8203;state</span><br/>{quic_&#8203;conn_&#8203;state="<span class="metrics-enum">abort</span>"} | gauge | The number of QUIC connections in each state. (connection terminating due to error) |
 | <span class="metrics-name">quic_&#8203;connections_&#8203;state</span><br/>{quic_&#8203;conn_&#8203;state="<span class="metrics-enum">close_&#8203;pending</span>"} | gauge | The number of QUIC connections in each state. (connection is closing) |
 | <span class="metrics-name">quic_&#8203;connections_&#8203;state</span><br/>{quic_&#8203;conn_&#8203;state="<span class="metrics-enum">dead</span>"} | gauge | The number of QUIC connections in each state. (connection about to be freed) |
+| <span class="metrics-name">quic_&#8203;connections_&#8203;state</span><br/>{quic_&#8203;conn_&#8203;state="<span class="metrics-enum">timeout</span>"} | gauge | The number of QUIC connections in each state. (connection timed out) |
 | <span class="metrics-name">quic_&#8203;connections_&#8203;created</span> | counter | The total number of connections that have been created. |
 | <span class="metrics-name">quic_&#8203;connections_&#8203;closed</span> | counter | Number of connections gracefully closed. |
 | <span class="metrics-name">quic_&#8203;connections_&#8203;aborted</span> | counter | Number of connections aborted. |
 | <span class="metrics-name">quic_&#8203;connections_&#8203;timed_&#8203;out</span> | counter | Number of connections timed out. |
+| <span class="metrics-name">quic_&#8203;connections_&#8203;timeout_&#8203;revived</span> | counter | Number of connections revived after timing out. |
+| <span class="metrics-name">quic_&#8203;connections_&#8203;timeout_&#8203;freed</span> | counter | Number of connections freed after timing out. |
 | <span class="metrics-name">quic_&#8203;connections_&#8203;retried</span> | counter | Number of connections established with retry. |
 | <span class="metrics-name">quic_&#8203;connection_&#8203;error_&#8203;no_&#8203;slots</span> | counter | Number of connections that failed to create due to lack of slots. |
 | <span class="metrics-name">quic_&#8203;connection_&#8203;error_&#8203;retry_&#8203;fail</span> | counter | Number of connections that failed during retry (e.g. invalid token). |
@@ -782,10 +785,13 @@
 | <span class="metrics-name">send_&#8203;connections_&#8203;state</span><br/>{quic_&#8203;conn_&#8203;state="<span class="metrics-enum">abort</span>"} | gauge | Number of QUIC connections in each state (connection terminating due to error) |
 | <span class="metrics-name">send_&#8203;connections_&#8203;state</span><br/>{quic_&#8203;conn_&#8203;state="<span class="metrics-enum">close_&#8203;pending</span>"} | gauge | Number of QUIC connections in each state (connection is closing) |
 | <span class="metrics-name">send_&#8203;connections_&#8203;state</span><br/>{quic_&#8203;conn_&#8203;state="<span class="metrics-enum">dead</span>"} | gauge | Number of QUIC connections in each state (connection about to be freed) |
+| <span class="metrics-name">send_&#8203;connections_&#8203;state</span><br/>{quic_&#8203;conn_&#8203;state="<span class="metrics-enum">timeout</span>"} | gauge | Number of QUIC connections in each state (connection timed out) |
 | <span class="metrics-name">send_&#8203;connections_&#8203;created</span> | counter | Total count of QUIC connections created |
 | <span class="metrics-name">send_&#8203;connections_&#8203;closed</span> | counter | Total count of QUIC connections closed |
 | <span class="metrics-name">send_&#8203;connections_&#8203;aborted</span> | counter | Total count of QUIC connections aborted |
 | <span class="metrics-name">send_&#8203;connections_&#8203;timed_&#8203;out</span> | counter | Total count of QUIC connections timed out |
+| <span class="metrics-name">send_&#8203;connections_&#8203;timeout_&#8203;revived</span> | counter | Total count of QUIC connections revived after timing out |
+| <span class="metrics-name">send_&#8203;connections_&#8203;timeout_&#8203;freed</span> | counter | Total count of QUIC connections freed after timing out |
 | <span class="metrics-name">send_&#8203;connections_&#8203;retried</span> | counter | Total count of QUIC connections retried |
 | <span class="metrics-name">send_&#8203;connection_&#8203;error_&#8203;no_&#8203;slots</span> | counter | Total count of connection errors due to no slots |
 | <span class="metrics-name">send_&#8203;connection_&#8203;error_&#8203;retry_&#8203;fail</span> | counter | Total count of connection retry failures |

src/disco/metrics/generated/fd_metrics_enums.h

@@ -146,7 +146,7 @@
 #define FD_METRICS_ENUM_QUIC_ENC_LEVEL_V_APP_NAME "app"
 
 #define FD_METRICS_ENUM_QUIC_CONN_STATE_NAME "quic_conn_state"
-#define FD_METRICS_ENUM_QUIC_CONN_STATE_CNT (8UL)
+#define FD_METRICS_ENUM_QUIC_CONN_STATE_CNT (9UL)
 #define FD_METRICS_ENUM_QUIC_CONN_STATE_V_INVALID_IDX  0
 #define FD_METRICS_ENUM_QUIC_CONN_STATE_V_INVALID_NAME "invalid"
 #define FD_METRICS_ENUM_QUIC_CONN_STATE_V_HANDSHAKE_IDX  1
@@ -163,6 +163,8 @@
 #define FD_METRICS_ENUM_QUIC_CONN_STATE_V_CLOSE_PENDING_NAME "close_pending"
 #define FD_METRICS_ENUM_QUIC_CONN_STATE_V_DEAD_IDX  7
 #define FD_METRICS_ENUM_QUIC_CONN_STATE_V_DEAD_NAME "dead"
+#define FD_METRICS_ENUM_QUIC_CONN_STATE_V_TIMEOUT_IDX  8
+#define FD_METRICS_ENUM_QUIC_CONN_STATE_V_TIMEOUT_NAME "timeout"
 
 #define FD_METRICS_ENUM_NEW_CONTACT_OUTCOME_NAME "new_contact_outcome"
 #define FD_METRICS_ENUM_NEW_CONTACT_OUTCOME_CNT (5UL)

src/disco/metrics/generated/fd_metrics_quic.c

@@ -29,10 +29,13 @@ const fd_metrics_meta_t FD_METRICS_QUIC[FD_METRICS_QUIC_TOTAL] = {
     DECLARE_METRIC_ENUM( QUIC_CONNECTIONS_STATE, GAUGE, QUIC_CONN_STATE, ABORT ),
     DECLARE_METRIC_ENUM( QUIC_CONNECTIONS_STATE, GAUGE, QUIC_CONN_STATE, CLOSE_PENDING ),
     DECLARE_METRIC_ENUM( QUIC_CONNECTIONS_STATE, GAUGE, QUIC_CONN_STATE, DEAD ),
+    DECLARE_METRIC_ENUM( QUIC_CONNECTIONS_STATE, GAUGE, QUIC_CONN_STATE, TIMEOUT ),
     DECLARE_METRIC( QUIC_CONNECTIONS_CREATED, COUNTER ),
     DECLARE_METRIC( QUIC_CONNECTIONS_CLOSED, COUNTER ),
     DECLARE_METRIC( QUIC_CONNECTIONS_ABORTED, COUNTER ),
     DECLARE_METRIC( QUIC_CONNECTIONS_TIMED_OUT, COUNTER ),
+    DECLARE_METRIC( QUIC_CONNECTIONS_TIMEOUT_REVIVED, COUNTER ),
+    DECLARE_METRIC( QUIC_CONNECTIONS_TIMEOUT_FREED, COUNTER ),
     DECLARE_METRIC( QUIC_CONNECTIONS_RETRIED, COUNTER ),
     DECLARE_METRIC( QUIC_CONNECTION_ERROR_NO_SLOTS, COUNTER ),
     DECLARE_METRIC( QUIC_CONNECTION_ERROR_RETRY_FAIL, COUNTER ),