refactor(node): restart remote xray after tx commit, not inside it

Move the remote RestartXray calls out of the addTraffic write
transaction. disableInvalidClients now returns the affected remote
node IDs instead of restarting their xray while the SQLite write lock
is held; AddTraffic performs the restart after the transaction commits
via restartRemoteNodesOnDisable. Avoids holding the serialized write
lock across slow per-node restart RPCs.

web/service/inbound.go

@@ -1789,15 +1789,19 @@ func (s *InboundService) setRemoteTrafficLocked(nodeID int, snap *runtime.Traffi
 }
 
 func (s *InboundService) AddTraffic(inboundTraffics []*xray.Traffic, clientTraffics []*xray.ClientTraffic) (needRestart bool, clientsDisabled bool, err error) {
+	var disabledNodeIDs []int
 	err = submitTrafficWrite(func() error {
 		var inner error
-		needRestart, clientsDisabled, inner = s.addTrafficLocked(inboundTraffics, clientTraffics)
+		needRestart, clientsDisabled, disabledNodeIDs, inner = s.addTrafficLocked(inboundTraffics, clientTraffics)
 		return inner
 	})
+	if err == nil && len(disabledNodeIDs) > 0 {
+		s.restartRemoteNodesOnDisable(disabledNodeIDs)
+	}
 	return
 }
 
-func (s *InboundService) addTrafficLocked(inboundTraffics []*xray.Traffic, clientTraffics []*xray.ClientTraffic) (bool, bool, error) {
+func (s *InboundService) addTrafficLocked(inboundTraffics []*xray.Traffic, clientTraffics []*xray.ClientTraffic) (bool, bool, []int, error) {
 	var err error
 	db := database.GetDB()
 	tx := db.Begin()
@@ -1811,11 +1815,11 @@ func (s *InboundService) addTrafficLocked(inboundTraffics []*xray.Traffic, clien
 	}()
 	err = s.addInboundTraffic(tx, inboundTraffics)
 	if err != nil {
-		return false, false, err
+		return false, false, nil, err
 	}
 	err = s.addClientTraffic(tx, clientTraffics)
 	if err != nil {
-		return false, false, err
+		return false, false, nil, err
 	}
 
 	needRestart0, count, err := s.autoRenewClients(tx)
@@ -1826,7 +1830,7 @@ func (s *InboundService) addTrafficLocked(inboundTraffics []*xray.Traffic, clien
 	}
 
 	disabledClientsCount := int64(0)
-	needRestart1, count, err := s.disableInvalidClients(tx)
+	needRestart1, count, disabledNodeIDs, err := s.disableInvalidClients(tx)
 	if err != nil {
 		logger.Warning("Error in disabling invalid clients:", err)
 	} else if count > 0 {
@@ -1840,7 +1844,7 @@ func (s *InboundService) addTrafficLocked(inboundTraffics []*xray.Traffic, clien
 	} else if count > 0 {
 		logger.Debugf("%v inbounds disabled", count)
 	}
-	return needRestart0 || needRestart1 || needRestart2, disabledClientsCount > 0, nil
+	return needRestart0 || needRestart1 || needRestart2, disabledClientsCount > 0, disabledNodeIDs, nil
 }
 
 func (s *InboundService) addInboundTraffic(tx *gorm.DB, traffics []*xray.Traffic) error {
@@ -2196,7 +2200,7 @@ func (s *InboundService) disableInvalidInbounds(tx *gorm.DB) (bool, int64, error
 	return needRestart, count, err
 }
 
-func (s *InboundService) disableInvalidClients(tx *gorm.DB) (bool, int64, error) {
+func (s *InboundService) disableInvalidClients(tx *gorm.DB) (bool, int64, []int, error) {
 	now := time.Now().Unix() * 1000
 	needRestart := false
 
@@ -2205,10 +2209,10 @@ func (s *InboundService) disableInvalidClients(tx *gorm.DB) (bool, int64, error)
 		Where("((total > 0 AND up + down >= total) OR (expiry_time > 0 AND expiry_time <= ?)) AND enable = ?", now, true).
 		Find(&depletedRows).Error
 	if err != nil {
-		return false, 0, err
+		return false, 0, nil, err
 	}
 	if len(depletedRows) == 0 {
-		return false, 0, nil
+		return false, 0, nil, nil
 	}
 
 	depletedEmails := make([]string, 0, len(depletedRows))
@@ -2236,7 +2240,7 @@ func (s *InboundService) disableInvalidClients(tx *gorm.DB) (bool, int64, error)
 			WHERE clients.email IN ?
 		`, depletedEmails).Scan(&targets).Error
 		if err != nil {
-			return false, 0, err
+			return false, 0, nil, err
 		}
 	}
 
@@ -2283,7 +2287,7 @@ func (s *InboundService) disableInvalidClients(tx *gorm.DB) (bool, int64, error)
 	err = result.Error
 	count := result.RowsAffected
 	if err != nil {
-		return needRestart, count, err
+		return needRestart, count, nil, err
 	}
 
 	if len(depletedEmails) > 0 {
@@ -2294,8 +2298,6 @@ func (s *InboundService) disableInvalidClients(tx *gorm.DB) (bool, int64, error)
 		}
 	}
 
-	// Track which remote nodes had clients successfully disabled so we can
-	// restart their xray and kill the existing active connections.
 	disabledNodeIDs := make(map[int]struct{})
 	for inboundID, group := range remoteByInbound {
 		emails := make(map[string]struct{}, len(group))
@@ -2314,12 +2316,24 @@ func (s *InboundService) disableInvalidClients(tx *gorm.DB) (bool, int64, error)
 		}
 	}
 
-	// Restart xray on each affected remote node so active connections are
-	// dropped immediately, not just blocked on the next reconnect attempt.
-	if len(disabledNodeIDs) > 0 {
-		restartOnDisable, _ := (&SettingService{}).GetRestartXrayOnClientDisable()
-		if restartOnDisable {
+	nodeIDs := make([]int, 0, len(disabledNodeIDs))
 	for nodeID := range disabledNodeIDs {
+		nodeIDs = append(nodeIDs, nodeID)
+	}
+
+	return needRestart, count, nodeIDs, nil
+}
+
+func (s *InboundService) restartRemoteNodesOnDisable(nodeIDs []int) {
+	restartOnDisable, err := (&SettingService{}).GetRestartXrayOnClientDisable()
+	if err != nil {
+		logger.Warning("disableInvalidClients: get RestartXrayOnClientDisable failed:", err)
+		return
+	}
+	if !restartOnDisable {
+		return
+	}
+	for _, nodeID := range nodeIDs {
 		nodeIDCopy := nodeID
 		rt, rtErr := runtime.GetManager().RuntimeFor(&nodeIDCopy)
 		if rtErr != nil {
@@ -2330,10 +2344,6 @@ func (s *InboundService) disableInvalidClients(tx *gorm.DB) (bool, int64, error)
 			logger.Warning("disableInvalidClients: restart xray on node", nodeID, "failed:", rtErr)
 		}
 	}
-		}
-	}
-
-	return needRestart, count, nil
 }
 
 // markClientsDisabledInSettings flips client.enable=false in the inbound's