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Cache most-recently-announced block's shared_ptr

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This commit is contained in:
Matt Corallo 2016-12-14 16:28:22 -08:00
parent c802092142
commit 9eaec08dd2
1 changed files with 40 additions and 11 deletions
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51
src/net_processing.cpp
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@ -752,6 +752,10 @@ void PeerLogicValidation::SyncTransaction(const CTransaction& tx, const CBlockIn
}
}
static CCriticalSection cs_most_recent_block;
static std::shared_ptr<const CBlock> most_recent_block;
static uint256 most_recent_block_hash;
void PeerLogicValidation::NewPoWValidBlock(const CBlockIndex *pindex, const std::shared_ptr<const CBlock>& pblock) {
CBlockHeaderAndShortTxIDs cmpctblock(*pblock, true);
CNetMsgMaker msgMaker(PROTOCOL_VERSION);
@ -766,6 +770,12 @@ void PeerLogicValidation::NewPoWValidBlock(const CBlockIndex *pindex, const std:
bool fWitnessEnabled = IsWitnessEnabled(pindex->pprev, Params().GetConsensus());
uint256 hashBlock(pblock->GetHash());
{
LOCK(cs_most_recent_block);
most_recent_block_hash = hashBlock;
most_recent_block = pblock;
}
connman->ForEachNode([this, &cmpctblock, pindex, &msgMaker, fWitnessEnabled, &hashBlock](CNode* pnode) {
// TODO: Avoid the repeated-serialization here
if (pnode->nVersion < INVALID_CB_NO_BAN_VERSION || pnode->fDisconnect)
@ -1090,6 +1100,23 @@ uint32_t GetFetchFlags(CNode* pfrom, const CBlockIndex* pprev, const Consensus::
return nFetchFlags;
}
inline void static SendBlockTransactions(const CBlock& block, const BlockTransactionsRequest& req, CNode* pfrom, CConnman& connman) {
BlockTransactions resp(req);
for (size_t i = 0; i < req.indexes.size(); i++) {
if (req.indexes[i] >= block.vtx.size()) {
LOCK(cs_main);
Misbehaving(pfrom->GetId(), 100);
LogPrintf("Peer %d sent us a getblocktxn with out-of-bounds tx indices", pfrom->id);
return;
}
resp.txn[i] = block.vtx[req.indexes[i]];
}
LOCK(cs_main);
CNetMsgMaker msgMaker(pfrom->GetSendVersion());
int nSendFlags = State(pfrom->GetId())->fWantsCmpctWitness ? 0 : SERIALIZE_TRANSACTION_NO_WITNESS;
connman.PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::BLOCKTXN, resp));
}
bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv, int64_t nTimeReceived, const CChainParams& chainparams, CConnman& connman, std::atomic<bool>& interruptMsgProc)
{
unsigned int nMaxSendBufferSize = connman.GetSendBufferSize();
@ -1529,6 +1556,18 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
BlockTransactionsRequest req;
vRecv >> req;
std::shared_ptr<const CBlock> recent_block;
{
LOCK(cs_most_recent_block);
if (most_recent_block_hash == req.blockhash)
recent_block = most_recent_block;
// Unlock cs_most_recent_block to avoid cs_main lock inversion
}
if (recent_block) {
SendBlockTransactions(*recent_block, req, pfrom, connman);
return true;
}
LOCK(cs_main);
BlockMap::iterator it = mapBlockIndex.find(req.blockhash);
@ -1558,17 +1597,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
bool ret = ReadBlockFromDisk(block, it->second, chainparams.GetConsensus());
assert(ret);
BlockTransactions resp(req);
for (size_t i = 0; i < req.indexes.size(); i++) {
if (req.indexes[i] >= block.vtx.size()) {
Misbehaving(pfrom->GetId(), 100);
LogPrintf("Peer %d sent us a getblocktxn with out-of-bounds tx indices", pfrom->id);
return true;
}
resp.txn[i] = block.vtx[req.indexes[i]];
}
int nSendFlags = State(pfrom->GetId())->fWantsCmpctWitness ? 0 : SERIALIZE_TRANSACTION_NO_WITNESS;
connman.PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::BLOCKTXN, resp));
SendBlockTransactions(block, req, pfrom, connman);
}