refactor: Remove mempool global from net

MarcoFalke · MarcoFalke · commit fa7fea365420 · 2020-03-12T09:23:56.000-04:00
This refactor does two things:
* Pass mempool in to PeerLogicValidation
* Pass m_mempool around where needed
diff --git a/src/init.cpp b/src/init.cpp
@@ -1329,8 +1329,12 @@ bool AppInitMain(NodeContext& node)
     node.banman = MakeUnique<BanMan>(GetDataDir() / "banlist.dat", &uiInterface, gArgs.GetArg("-bantime", DEFAULT_MISBEHAVING_BANTIME));
     assert(!node.connman);
     node.connman = std::unique_ptr<CConnman>(new CConnman(GetRand(std::numeric_limits<uint64_t>::max()), GetRand(std::numeric_limits<uint64_t>::max())));
+    // Make mempool generally available in the node context. For example the connection manager, wallet, or RPC threads,
+    // which are all started after this, may use it from the node context.
+    assert(!node.mempool);
+    node.mempool = &::mempool;
 
-    node.peer_logic.reset(new PeerLogicValidation(node.connman.get(), node.banman.get(), *node.scheduler));
+    node.peer_logic.reset(new PeerLogicValidation(node.connman.get(), node.banman.get(), *node.scheduler, *node.mempool));
     RegisterValidationInterface(node.peer_logic.get());
 
     // sanitize comments per BIP-0014, format user agent and check total size
@@ -1678,11 +1682,6 @@ bool AppInitMain(NodeContext& node)
         return false;
     }
 
-    // Now that the chain state is loaded, make mempool generally available in the node context. For example the
-    // connection manager, wallet, or RPC threads, which are all started after this, may use it from the node context.
-    assert(!node.mempool);
-    node.mempool = &::mempool;
-
     fs::path est_path = GetDataDir() / FEE_ESTIMATES_FILENAME;
     CAutoFile est_filein(fsbridge::fopen(est_path, "rb"), SER_DISK, CLIENT_VERSION);
     // Allowed to fail as this file IS missing on first startup.
diff --git a/src/net_processing.cpp b/src/net_processing.cpp
@@ -465,7 +465,7 @@ static bool MarkBlockAsReceived(const uint256& hash) EXCLUSIVE_LOCKS_REQUIRED(cs
 
 // returns false, still setting pit, if the block was already in flight from the same peer
 // pit will only be valid as long as the same cs_main lock is being held
-static bool MarkBlockAsInFlight(NodeId nodeid, const uint256& hash, const CBlockIndex* pindex = nullptr, std::list<QueuedBlock>::iterator** pit = nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs_main) {
+static bool MarkBlockAsInFlight(CTxMemPool& mempool, NodeId nodeid, const uint256& hash, const CBlockIndex* pindex = nullptr, std::list<QueuedBlock>::iterator** pit = nullptr) EXCLUSIVE_LOCKS_REQUIRED(cs_main) {
     CNodeState *state = State(nodeid);
     assert(state != nullptr);
 
@@ -1102,8 +1102,11 @@ static bool BlockRequestAllowed(const CBlockIndex* pindex, const Consensus::Para
         (GetBlockProofEquivalentTime(*pindexBestHeader, *pindex, *pindexBestHeader, consensusParams) < STALE_RELAY_AGE_LIMIT);
 }
 
-PeerLogicValidation::PeerLogicValidation(CConnman* connmanIn, BanMan* banman, CScheduler& scheduler)
-    : connman(connmanIn), m_banman(banman), m_stale_tip_check_time(0)
+PeerLogicValidation::PeerLogicValidation(CConnman* connmanIn, BanMan* banman, CScheduler& scheduler, CTxMemPool& pool)
+    : connman(connmanIn),
+      m_banman(banman),
+      m_mempool(pool),
+      m_stale_tip_check_time(0)
 {
     // Initialize global variables that cannot be constructed at startup.
     recentRejects.reset(new CRollingBloomFilter(120000, 0.000001));
@@ -1314,7 +1317,7 @@ void PeerLogicValidation::BlockChecked(const CBlock& block, const BlockValidatio
 //
 
 
-bool static AlreadyHave(const CInv& inv) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
+bool static AlreadyHave(const CInv& inv, const CTxMemPool& mempool) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
 {
     switch (inv.type)
     {
@@ -1553,7 +1556,7 @@ void static ProcessGetBlockData(CNode* pfrom, const CChainParams& chainparams, c
     }
 }
 
-void static ProcessGetData(CNode* pfrom, const CChainParams& chainparams, CConnman* connman, const std::atomic<bool>& interruptMsgProc) LOCKS_EXCLUDED(cs_main)
+void static ProcessGetData(CNode* pfrom, const CChainParams& chainparams, CConnman* connman, const CTxMemPool& mempool, const std::atomic<bool>& interruptMsgProc) LOCKS_EXCLUDED(cs_main)
 {
     AssertLockNotHeld(cs_main);
 
@@ -1666,7 +1669,7 @@ inline void static SendBlockTransactions(const CBlock& block, const BlockTransac
     connman->PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::BLOCKTXN, resp));
 }
 
-bool static ProcessHeadersMessage(CNode *pfrom, CConnman *connman, const std::vector<CBlockHeader>& headers, const CChainParams& chainparams, bool via_compact_block)
+bool static ProcessHeadersMessage(CNode* pfrom, CConnman* connman, CTxMemPool& mempool, const std::vector<CBlockHeader>& headers, const CChainParams& chainparams, bool via_compact_block)
 {
     const CNetMsgMaker msgMaker(pfrom->GetSendVersion());
     size_t nCount = headers.size();
@@ -1794,7 +1797,7 @@ bool static ProcessHeadersMessage(CNode *pfrom, CConnman *connman, const std::ve
                     }
                     uint32_t nFetchFlags = GetFetchFlags(pfrom);
                     vGetData.push_back(CInv(MSG_BLOCK | nFetchFlags, pindex->GetBlockHash()));
-                    MarkBlockAsInFlight(pfrom->GetId(), pindex->GetBlockHash(), pindex);
+                    MarkBlockAsInFlight(mempool, pfrom->GetId(), pindex->GetBlockHash(), pindex);
                     LogPrint(BCLog::NET, "Requesting block %s from  peer=%d\n",
                             pindex->GetBlockHash().ToString(), pfrom->GetId());
                 }
@@ -1848,7 +1851,7 @@ bool static ProcessHeadersMessage(CNode *pfrom, CConnman *connman, const std::ve
     return true;
 }
 
-void static ProcessOrphanTx(CConnman* connman, std::set<uint256>& orphan_work_set, std::list<CTransactionRef>& removed_txn) EXCLUSIVE_LOCKS_REQUIRED(cs_main, g_cs_orphans)
+void static ProcessOrphanTx(CConnman* connman, CTxMemPool& mempool, std::set<uint256>& orphan_work_set, std::list<CTransactionRef>& removed_txn) EXCLUSIVE_LOCKS_REQUIRED(cs_main, g_cs_orphans)
 {
     AssertLockHeld(cs_main);
     AssertLockHeld(g_cs_orphans);
@@ -1908,7 +1911,7 @@ void static ProcessOrphanTx(CConnman* connman, std::set<uint256>& orphan_work_se
     }
 }
 
-bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vRecv, int64_t nTimeReceived, const CChainParams& chainparams, CConnman* connman, BanMan* banman, const std::atomic<bool>& interruptMsgProc)
+bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vRecv, int64_t nTimeReceived, const CChainParams& chainparams, CTxMemPool& mempool, CConnman* connman, BanMan* banman, const std::atomic<bool>& interruptMsgProc)
 {
     LogPrint(BCLog::NET, "received: %s (%u bytes) peer=%d\n", SanitizeString(strCommand), vRecv.size(), pfrom->GetId());
     if (gArgs.IsArgSet("-dropmessagestest") && GetRand(gArgs.GetArg("-dropmessagestest", 0)) == 0)
@@ -2260,7 +2263,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR
             if (interruptMsgProc)
                 return true;
 
-            bool fAlreadyHave = AlreadyHave(inv);
+            bool fAlreadyHave = AlreadyHave(inv, mempool);
             LogPrint(BCLog::NET, "got inv: %s  %s peer=%d\n", inv.ToString(), fAlreadyHave ? "have" : "new", pfrom->GetId());
 
             if (inv.type == MSG_TX) {
@@ -2311,7 +2314,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR
         }
 
         pfrom->vRecvGetData.insert(pfrom->vRecvGetData.end(), vInv.begin(), vInv.end());
-        ProcessGetData(pfrom, chainparams, connman, interruptMsgProc);
+        ProcessGetData(pfrom, chainparams, connman, mempool, interruptMsgProc);
         return true;
     }
 
@@ -2528,7 +2531,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR
 
         std::list<CTransactionRef> lRemovedTxn;
 
-        if (!AlreadyHave(inv) &&
+        if (!AlreadyHave(inv, mempool) &&
             AcceptToMemoryPool(mempool, state, ptx, &lRemovedTxn, false /* bypass_limits */, 0 /* nAbsurdFee */)) {
             mempool.check(&::ChainstateActive().CoinsTip());
             RelayTransaction(tx.GetHash(), *connman);
@@ -2549,7 +2552,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR
                 mempool.size(), mempool.DynamicMemoryUsage() / 1000);
 
             // Recursively process any orphan transactions that depended on this one
-            ProcessOrphanTx(connman, pfrom->orphan_work_set, lRemovedTxn);
+            ProcessOrphanTx(connman, mempool, pfrom->orphan_work_set, lRemovedTxn);
         }
         else if (state.GetResult() == TxValidationResult::TX_MISSING_INPUTS)
         {
@@ -2567,7 +2570,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR
                 for (const CTxIn& txin : tx.vin) {
                     CInv _inv(MSG_TX | nFetchFlags, txin.prevout.hash);
                     pfrom->AddInventoryKnown(_inv);
-                    if (!AlreadyHave(_inv)) RequestTx(State(pfrom->GetId()), _inv.hash, current_time);
+                    if (!AlreadyHave(_inv, mempool)) RequestTx(State(pfrom->GetId()), _inv.hash, current_time);
                 }
                 AddOrphanTx(ptx, pfrom->GetId());
 
@@ -2742,7 +2745,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR
             if ((!fAlreadyInFlight && nodestate->nBlocksInFlight < MAX_BLOCKS_IN_TRANSIT_PER_PEER) ||
                  (fAlreadyInFlight && blockInFlightIt->second.first == pfrom->GetId())) {
                 std::list<QueuedBlock>::iterator* queuedBlockIt = nullptr;
-                if (!MarkBlockAsInFlight(pfrom->GetId(), pindex->GetBlockHash(), pindex, &queuedBlockIt)) {
+                if (!MarkBlockAsInFlight(mempool, pfrom->GetId(), pindex->GetBlockHash(), pindex, &queuedBlockIt)) {
                     if (!(*queuedBlockIt)->partialBlock)
                         (*queuedBlockIt)->partialBlock.reset(new PartiallyDownloadedBlock(&mempool));
                     else {
@@ -2815,15 +2818,15 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR
         } // cs_main
 
         if (fProcessBLOCKTXN)
-            return ProcessMessage(pfrom, NetMsgType::BLOCKTXN, blockTxnMsg, nTimeReceived, chainparams, connman, banman, interruptMsgProc);
+            return ProcessMessage(pfrom, NetMsgType::BLOCKTXN, blockTxnMsg, nTimeReceived, chainparams, mempool, connman, banman, interruptMsgProc);
 
         if (fRevertToHeaderProcessing) {
             // Headers received from HB compact block peers are permitted to be
             // relayed before full validation (see BIP 152), so we don't want to disconnect
             // the peer if the header turns out to be for an invalid block.
             // Note that if a peer tries to build on an invalid chain, that
             // will be detected and the peer will be banned.
-            return ProcessHeadersMessage(pfrom, connman, {cmpctblock.header}, chainparams, /*via_compact_block=*/true);
+            return ProcessHeadersMessage(pfrom, connman, mempool, {cmpctblock.header}, chainparams, /*via_compact_block=*/true);
         }
 
         if (fBlockReconstructed) {
@@ -2967,7 +2970,7 @@ bool ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vR
             ReadCompactSize(vRecv); // ignore tx count; assume it is 0.
         }
 
-        return ProcessHeadersMessage(pfrom, connman, headers, chainparams, /*via_compact_block=*/false);
+        return ProcessHeadersMessage(pfrom, connman, mempool, headers, chainparams, /*via_compact_block=*/false);
     }
 
     if (strCommand == NetMsgType::BLOCK)
@@ -3285,12 +3288,12 @@ bool PeerLogicValidation::ProcessMessages(CNode* pfrom, std::atomic<bool>& inter
     bool fMoreWork = false;
 
     if (!pfrom->vRecvGetData.empty())
-        ProcessGetData(pfrom, chainparams, connman, interruptMsgProc);
+        ProcessGetData(pfrom, chainparams, connman, m_mempool, interruptMsgProc);
 
     if (!pfrom->orphan_work_set.empty()) {
         std::list<CTransactionRef> removed_txn;
         LOCK2(cs_main, g_cs_orphans);
-        ProcessOrphanTx(connman, pfrom->orphan_work_set, removed_txn);
+        ProcessOrphanTx(connman, m_mempool, pfrom->orphan_work_set, removed_txn);
         for (const CTransactionRef& removedTx : removed_txn) {
             AddToCompactExtraTransactions(removedTx);
         }
@@ -3353,7 +3356,7 @@ bool PeerLogicValidation::ProcessMessages(CNode* pfrom, std::atomic<bool>& inter
     bool fRet = false;
     try
     {
-        fRet = ProcessMessage(pfrom, strCommand, vRecv, msg.m_time, chainparams, connman, m_banman, interruptMsgProc);
+        fRet = ProcessMessage(pfrom, strCommand, vRecv, msg.m_time, chainparams, m_mempool, connman, m_banman, interruptMsgProc);
         if (interruptMsgProc)
             return false;
         if (!pfrom->vRecvGetData.empty())
@@ -3819,7 +3822,7 @@ bool PeerLogicValidation::SendMessages(CNode* pto)
 
                 // Respond to BIP35 mempool requests
                 if (fSendTrickle && pto->m_tx_relay->fSendMempool) {
-                    auto vtxinfo = mempool.infoAll();
+                    auto vtxinfo = m_mempool.infoAll();
                     pto->m_tx_relay->fSendMempool = false;
                     CFeeRate filterrate;
                     {
@@ -3865,7 +3868,7 @@ bool PeerLogicValidation::SendMessages(CNode* pto)
                     }
                     // Topologically and fee-rate sort the inventory we send for privacy and priority reasons.
                     // A heap is used so that not all items need sorting if only a few are being sent.
-                    CompareInvMempoolOrder compareInvMempoolOrder(&mempool);
+                    CompareInvMempoolOrder compareInvMempoolOrder(&m_mempool);
                     std::make_heap(vInvTx.begin(), vInvTx.end(), compareInvMempoolOrder);
                     // No reason to drain out at many times the network's capacity,
                     // especially since we have many peers and some will draw much shorter delays.
@@ -3884,7 +3887,7 @@ bool PeerLogicValidation::SendMessages(CNode* pto)
                             continue;
                         }
                         // Not in the mempool anymore? don't bother sending it.
-                        auto txinfo = mempool.info(hash);
+                        auto txinfo = m_mempool.info(hash);
                         if (!txinfo.tx) {
                             continue;
                         }
@@ -3996,7 +3999,7 @@ bool PeerLogicValidation::SendMessages(CNode* pto)
             for (const CBlockIndex *pindex : vToDownload) {
                 uint32_t nFetchFlags = GetFetchFlags(pto);
                 vGetData.push_back(CInv(MSG_BLOCK | nFetchFlags, pindex->GetBlockHash()));
-                MarkBlockAsInFlight(pto->GetId(), pindex->GetBlockHash(), pindex);
+                MarkBlockAsInFlight(m_mempool, pto->GetId(), pindex->GetBlockHash(), pindex);
                 LogPrint(BCLog::NET, "Requesting block %s (%d) peer=%d\n", pindex->GetBlockHash().ToString(),
                     pindex->nHeight, pto->GetId());
             }
@@ -4039,7 +4042,7 @@ bool PeerLogicValidation::SendMessages(CNode* pto)
             // processing at a later time, see below)
             tx_process_time.erase(tx_process_time.begin());
             CInv inv(MSG_TX | GetFetchFlags(pto), txid);
-            if (!AlreadyHave(inv)) {
+            if (!AlreadyHave(inv, m_mempool)) {
                 // If this transaction was last requested more than 1 minute ago,
                 // then request.
                 const auto last_request_time = GetTxRequestTime(inv.hash);
@@ -4077,7 +4080,7 @@ bool PeerLogicValidation::SendMessages(CNode* pto)
         // We don't want white listed peers to filter txs to us if we have -whitelistforcerelay
         if (pto->m_tx_relay != nullptr && pto->nVersion >= FEEFILTER_VERSION && gArgs.GetBoolArg("-feefilter", DEFAULT_FEEFILTER) &&
             !pto->HasPermission(PF_FORCERELAY)) {
-            CAmount currentFilter = mempool.GetMinFee(gArgs.GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000).GetFeePerK();
+            CAmount currentFilter = m_mempool.GetMinFee(gArgs.GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000).GetFeePerK();
             int64_t timeNow = GetTimeMicros();
             if (timeNow > pto->m_tx_relay->nextSendTimeFeeFilter) {
                 static CFeeRate default_feerate(DEFAULT_MIN_RELAY_TX_FEE);
diff --git a/src/net_processing.h b/src/net_processing.h
@@ -6,10 +6,12 @@
 #ifndef BITCOIN_NET_PROCESSING_H
 #define BITCOIN_NET_PROCESSING_H
 
-#include <net.h>
-#include <validationinterface.h>
 #include <consensus/params.h>
+#include <net.h>
 #include <sync.h>
+#include <validationinterface.h>
+
+class CTxMemPool;
 
 extern RecursiveMutex cs_main;
 
@@ -23,11 +25,12 @@ class PeerLogicValidation final : public CValidationInterface, public NetEventsI
 private:
     CConnman* const connman;
     BanMan* const m_banman;
+    CTxMemPool& m_mempool;
 
     bool CheckIfBanned(CNode* pnode) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
 
 public:
-    PeerLogicValidation(CConnman* connman, BanMan* banman, CScheduler& scheduler);
+    PeerLogicValidation(CConnman* connman, BanMan* banman, CScheduler& scheduler, CTxMemPool& pool);
 
     /**
      * Overridden from CValidationInterface.
diff --git a/src/test/denialofservice_tests.cpp b/src/test/denialofservice_tests.cpp
@@ -78,7 +78,7 @@ BOOST_FIXTURE_TEST_SUITE(denialofservice_tests, TestingSetup)
 BOOST_AUTO_TEST_CASE(outbound_slow_chain_eviction)
 {
     auto connman = MakeUnique<CConnman>(0x1337, 0x1337);
-    auto peerLogic = MakeUnique<PeerLogicValidation>(connman.get(), nullptr, *m_node.scheduler);
+    auto peerLogic = MakeUnique<PeerLogicValidation>(connman.get(), nullptr, *m_node.scheduler, *m_node.mempool);
 
     // Mock an outbound peer
     CAddress addr1(ip(0xa0b0c001), NODE_NONE);
@@ -148,7 +148,7 @@ static void AddRandomOutboundPeer(std::vector<CNode *> &vNodes, PeerLogicValidat
 BOOST_AUTO_TEST_CASE(stale_tip_peer_management)
 {
     auto connman = MakeUnique<CConnmanTest>(0x1337, 0x1337);
-    auto peerLogic = MakeUnique<PeerLogicValidation>(connman.get(), nullptr, *m_node.scheduler);
+    auto peerLogic = MakeUnique<PeerLogicValidation>(connman.get(), nullptr, *m_node.scheduler, *m_node.mempool);
 
     const Consensus::Params& consensusParams = Params().GetConsensus();
     constexpr int max_outbound_full_relay = 8;
@@ -221,7 +221,7 @@ BOOST_AUTO_TEST_CASE(DoS_banning)
 {
     auto banman = MakeUnique<BanMan>(GetDataDir() / "banlist.dat", nullptr, DEFAULT_MISBEHAVING_BANTIME);
     auto connman = MakeUnique<CConnman>(0x1337, 0x1337);
-    auto peerLogic = MakeUnique<PeerLogicValidation>(connman.get(), banman.get(), *m_node.scheduler);
+    auto peerLogic = MakeUnique<PeerLogicValidation>(connman.get(), banman.get(), *m_node.scheduler, *m_node.mempool);
 
     banman->ClearBanned();
     CAddress addr1(ip(0xa0b0c001), NODE_NONE);
@@ -276,7 +276,7 @@ BOOST_AUTO_TEST_CASE(DoS_banscore)
 {
     auto banman = MakeUnique<BanMan>(GetDataDir() / "banlist.dat", nullptr, DEFAULT_MISBEHAVING_BANTIME);
     auto connman = MakeUnique<CConnman>(0x1337, 0x1337);
-    auto peerLogic = MakeUnique<PeerLogicValidation>(connman.get(), banman.get(), *m_node.scheduler);
+    auto peerLogic = MakeUnique<PeerLogicValidation>(connman.get(), banman.get(), *m_node.scheduler, *m_node.mempool);
 
     banman->ClearBanned();
     gArgs.ForceSetArg("-banscore", "111"); // because 11 is my favorite number
@@ -323,7 +323,7 @@ BOOST_AUTO_TEST_CASE(DoS_bantime)
 {
     auto banman = MakeUnique<BanMan>(GetDataDir() / "banlist.dat", nullptr, DEFAULT_MISBEHAVING_BANTIME);
     auto connman = MakeUnique<CConnman>(0x1337, 0x1337);
-    auto peerLogic = MakeUnique<PeerLogicValidation>(connman.get(), banman.get(), *m_node.scheduler);
+    auto peerLogic = MakeUnique<PeerLogicValidation>(connman.get(), banman.get(), *m_node.scheduler, *m_node.mempool);
 
     banman->ClearBanned();
     int64_t nStartTime = GetTime();
diff --git a/src/test/fuzz/process_message.cpp b/src/test/fuzz/process_message.cpp
diff --git a/src/test/util/setup_common.cpp b/src/test/util/setup_common.cpp
