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Push down use of cs_main into FindTxForGetData

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This commit is contained in:
Pieter Wuille 2020-05-12 12:40:54 -07:00
parent c6131bf407
commit f2f32a3dee
1 changed files with 29 additions and 32 deletions
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61
src/net_processing.cpp
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@ -1609,11 +1609,14 @@ void static ProcessGetBlockData(CNode* pfrom, const CChainParams& chainparams, c
}
//! Determine whether or not a peer can request a transaction, and return it (or nullptr if not found or not allowed).
CTransactionRef static FindTxForGetData(const uint256& txid, const std::chrono::seconds mempool_req, const std::chrono::seconds longlived_mempool_time) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
CTransactionRef static FindTxForGetData(const uint256& txid, const std::chrono::seconds mempool_req, const std::chrono::seconds longlived_mempool_time) LOCKS_EXCLUDED(cs_main)
{
// Look up transaction in relay pool
auto mi = mapRelay.find(txid);
if (mi != mapRelay.end()) return mi->second;
{
LOCK(cs_main);
// Look up transaction in relay pool
auto mi = mapRelay.find(txid);
if (mi != mapRelay.end()) return mi->second;
}
auto txinfo = mempool.info(txid);
if (txinfo.tx) {
@ -1642,37 +1645,31 @@ void static ProcessGetData(CNode* pfrom, const CChainParams& chainparams, CConnm
const std::chrono::seconds mempool_req = pfrom->m_tx_relay != nullptr ? pfrom->m_tx_relay->m_last_mempool_req.load()
: std::chrono::seconds::min();
{
LOCK(cs_main);
// Process as many TX items from the front of the getdata queue as
// possible, since they're common and it's efficient to batch process
// them.
while (it != pfrom->vRecvGetData.end() && (it->type == MSG_TX || it->type == MSG_WITNESS_TX)) {
if (interruptMsgProc) return;
// The send buffer provides backpressure. If there's no space in
// the buffer, pause processing until the next call.
if (pfrom->fPauseSend) break;
// Process as many TX items from the front of the getdata queue as
// possible, since they're common and it's efficient to batch process
// them.
while (it != pfrom->vRecvGetData.end() && (it->type == MSG_TX || it->type == MSG_WITNESS_TX)) {
if (interruptMsgProc)
return;
// The send buffer provides backpressure. If there's no space in
// the buffer, pause processing until the next call.
if (pfrom->fPauseSend)
break;
const CInv &inv = *it++;
const CInv &inv = *it++;
if (pfrom->m_tx_relay == nullptr) {
// Ignore GETDATA requests for transactions from blocks-only peers.
continue;
}
CTransactionRef tx = FindTxForGetData(inv.hash, mempool_req, longlived_mempool_time);
if (tx) {
int nSendFlags = (inv.type == MSG_TX ? SERIALIZE_TRANSACTION_NO_WITNESS : 0);
connman->PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::TX, *tx));
mempool.RemoveUnbroadcastTx(inv.hash);
} else {
vNotFound.push_back(inv);
}
if (pfrom->m_tx_relay == nullptr) {
// Ignore GETDATA requests for transactions from blocks-only peers.
continue;
}
} // release cs_main
CTransactionRef tx = FindTxForGetData(inv.hash, mempool_req, longlived_mempool_time);
if (tx) {
int nSendFlags = (inv.type == MSG_TX ? SERIALIZE_TRANSACTION_NO_WITNESS : 0);
connman->PushMessage(pfrom, msgMaker.Make(nSendFlags, NetMsgType::TX, *tx));
mempool.RemoveUnbroadcastTx(inv.hash);
} else {
vNotFound.push_back(inv);
}
}
// Only process one BLOCK item per call, since they're uncommon and can be
// expensive to process.