[refactor] Move tx relay state to separate structure

src/net.cpp

@@ -500,8 +500,8 @@ void CNode::copyStats(CNodeStats &stats)
     X(addr);
     X(addrBind);
     {
-        LOCK(cs_filter);
-        X(fRelayTxes);
+        LOCK(m_tx_relay.cs_filter);
+        stats.fRelayTxes = m_tx_relay.fRelayTxes;
     }
     X(nLastSend);
     X(nLastRecv);
@@ -529,8 +529,8 @@ void CNode::copyStats(CNodeStats &stats)
     X(m_legacyWhitelisted);
     X(m_permissionFlags);
     {
-        LOCK(cs_feeFilter);
-        X(minFeeFilter);
+        LOCK(m_tx_relay.cs_feeFilter);
+        stats.minFeeFilter = m_tx_relay.minFeeFilter;
     }
 
     // It is common for nodes with good ping times to suddenly become lagged,
@@ -818,11 +818,11 @@ bool CConnman::AttemptToEvictConnection()
                 continue;
             if (node->fDisconnect)
                 continue;
-            LOCK(node->cs_filter);
+            LOCK(node->m_tx_relay.cs_filter);
             NodeEvictionCandidate candidate = {node->GetId(), node->nTimeConnected, node->nMinPingUsecTime,
                                                node->nLastBlockTime, node->nLastTXTime,
                                                HasAllDesirableServiceFlags(node->nServices),
-                                               node->fRelayTxes, node->pfilter != nullptr, node->addr, node->nKeyedNetGroup,
+                                               node->m_tx_relay.fRelayTxes, node->m_tx_relay.pfilter != nullptr, node->addr, node->nKeyedNetGroup,
                                                node->m_prefer_evict};
             vEvictionCandidates.push_back(candidate);
         }
@@ -2625,7 +2625,6 @@ CNode::CNode(NodeId idIn, ServiceFlags nLocalServicesIn, int nMyStartingHeightIn
     fInbound(fInboundIn),
     nKeyedNetGroup(nKeyedNetGroupIn),
     addrKnown(5000, 0.001),
-    filterInventoryKnown(50000, 0.000001),
     id(idIn),
     nLocalHostNonce(nLocalHostNonceIn),
     nLocalServices(nLocalServicesIn),
@@ -2634,8 +2633,6 @@ CNode::CNode(NodeId idIn, ServiceFlags nLocalServicesIn, int nMyStartingHeightIn
     hSocket = hSocketIn;
     addrName = addrNameIn == "" ? addr.ToStringIPPort() : addrNameIn;
     hashContinue = uint256();
-    filterInventoryKnown.reset();
-    pfilter = MakeUnique<CBloomFilter>();
 
     for (const std::string &msg : getAllNetMessageTypes())
         mapRecvBytesPerMsgCmd[msg] = 0;

src/net.h

@@ -676,15 +676,8 @@ class CNode
     // Setting fDisconnect to true will cause the node to be disconnected the
     // next time DisconnectNodes() runs
     std::atomic_bool fDisconnect{false};
-    // We use fRelayTxes for two purposes -
-    // a) it allows us to not relay tx invs before receiving the peer's version message
-    // b) the peer may tell us in its version message that we should not relay tx invs
-    //    unless it loads a bloom filter.
-    bool fRelayTxes GUARDED_BY(cs_filter){false};
     bool fSentAddr{false};
     CSemaphoreGrant grantOutbound;
-    mutable CCriticalSection cs_filter;
-    std::unique_ptr<CBloomFilter> pfilter PT_GUARDED_BY(cs_filter);
     std::atomic<int> nRefCount{0};
 
     const uint64_t nKeyedNetGroup;
@@ -706,24 +699,43 @@ class CNode
     int64_t nNextAddrSend GUARDED_BY(cs_sendProcessing){0};
     int64_t nNextLocalAddrSend GUARDED_BY(cs_sendProcessing){0};
 
-    // inventory based relay
-    CRollingBloomFilter filterInventoryKnown GUARDED_BY(cs_inventory);
-    // Set of transaction ids we still have to announce.
-    // They are sorted by the mempool before relay, so the order is not important.
-    std::set<uint256> setInventoryTxToSend;
     // List of block ids we still have announce.
     // There is no final sorting before sending, as they are always sent immediately
     // and in the order requested.
     std::vector<uint256> vInventoryBlockToSend GUARDED_BY(cs_inventory);
     CCriticalSection cs_inventory;
-    int64_t nNextInvSend{0};
+
+    struct TxRelay {
+        TxRelay() { pfilter = MakeUnique<CBloomFilter>(); }
+        mutable CCriticalSection cs_filter;
+        // We use fRelayTxes for two purposes -
+        // a) it allows us to not relay tx invs before receiving the peer's version message
+        // b) the peer may tell us in its version message that we should not relay tx invs
+        //    unless it loads a bloom filter.
+        bool fRelayTxes GUARDED_BY(cs_filter){false};
+        std::unique_ptr<CBloomFilter> pfilter PT_GUARDED_BY(cs_filter) GUARDED_BY(cs_filter);
+
+        mutable CCriticalSection cs_tx_inventory;
+        CRollingBloomFilter filterInventoryKnown GUARDED_BY(cs_tx_inventory){50000, 0.000001};
+        // Set of transaction ids we still have to announce.
+        // They are sorted by the mempool before relay, so the order is not important.
+        std::set<uint256> setInventoryTxToSend;
+        // Used for BIP35 mempool sending
+        bool fSendMempool GUARDED_BY(cs_tx_inventory){false};
+        // Last time a "MEMPOOL" request was serviced.
+        std::atomic<int64_t> timeLastMempoolReq{0};
+        int64_t nNextInvSend{0};
+
+        CCriticalSection cs_feeFilter;
+        // Minimum fee rate with which to filter inv's to this node
+        CAmount minFeeFilter GUARDED_BY(cs_feeFilter){0};
+        CAmount lastSentFeeFilter{0};
+        int64_t nextSendTimeFeeFilter{0};
+    };
+
+    TxRelay m_tx_relay;
     // Used for headers announcements - unfiltered blocks to relay
     std::vector<uint256> vBlockHashesToAnnounce GUARDED_BY(cs_inventory);
-    // Used for BIP35 mempool sending
-    bool fSendMempool GUARDED_BY(cs_inventory){false};
-
-    // Last time a "MEMPOOL" request was serviced.
-    std::atomic<int64_t> timeLastMempoolReq{0};
 
     // Block and TXN accept times
     std::atomic<int64_t> nLastBlockTime{0};
@@ -740,11 +752,6 @@ class CNode
     std::atomic<int64_t> nMinPingUsecTime{std::numeric_limits<int64_t>::max()};
     // Whether a ping is requested.
     std::atomic<bool> fPingQueued{false};
-    // Minimum fee rate with which to filter inv's to this node
-    CAmount minFeeFilter GUARDED_BY(cs_feeFilter){0};
-    CCriticalSection cs_feeFilter;
-    CAmount lastSentFeeFilter{0};
-    int64_t nextSendTimeFeeFilter{0};
 
     std::set<uint256> orphan_work_set;
 
@@ -842,19 +849,20 @@ class CNode
     void AddInventoryKnown(const CInv& inv)
     {
         {
-            LOCK(cs_inventory);
-            filterInventoryKnown.insert(inv.hash);
+            LOCK(m_tx_relay.cs_tx_inventory);
+            m_tx_relay.filterInventoryKnown.insert(inv.hash);
         }
     }
 
     void PushInventory(const CInv& inv)
     {
-        LOCK(cs_inventory);
         if (inv.type == MSG_TX) {
-            if (!filterInventoryKnown.contains(inv.hash)) {
-                setInventoryTxToSend.insert(inv.hash);
+            LOCK(m_tx_relay.cs_tx_inventory);
+            if (!m_tx_relay.filterInventoryKnown.contains(inv.hash)) {
+                m_tx_relay.setInventoryTxToSend.insert(inv.hash);
             }
         } else if (inv.type == MSG_BLOCK) {
+            LOCK(cs_inventory);
             vInventoryBlockToSend.push_back(inv.hash);
         }
     }