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Merge #9252: Release cs_main before calling ProcessNewBlock, or processing headers (cmpctblock handling)

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bd02bdd Release cs_main before processing cmpctblock as header (Suhas Daftuar)
680b0c0 Release cs_main before calling ProcessNewBlock (cmpctblock handling) (Suhas Daftuar)
This commit is contained in:
Pieter Wuille 2017-01-03 13:41:42 -08:00
commit ce5c1f4aca
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1 changed files with 22 additions and 4 deletions
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26
src/net_processing.cpp
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@ -1782,11 +1782,24 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
} }
} }
// When we succeed in decoding a block's txids from a cmpctblock
// message we typically jump to the BLOCKTXN handling code, with a
// dummy (empty) BLOCKTXN message, to re-use the logic there in
// completing processing of the putative block (without cs_main).
bool fProcessBLOCKTXN = false;
CDataStream blockTxnMsg(SER_NETWORK, PROTOCOL_VERSION);
// If we end up treating this as a plain headers message, call that as well
// without cs_main.
bool fRevertToHeaderProcessing = false;
CDataStream vHeadersMsg(SER_NETWORK, PROTOCOL_VERSION);
// Keep a CBlock for "optimistic" compactblock reconstructions (see // Keep a CBlock for "optimistic" compactblock reconstructions (see
// below) // below)
std::shared_ptr<CBlock> pblock = std::make_shared<CBlock>(); std::shared_ptr<CBlock> pblock = std::make_shared<CBlock>();
bool fBlockReconstructed = false; bool fBlockReconstructed = false;
{
LOCK(cs_main); LOCK(cs_main);
// If AcceptBlockHeader returned true, it set pindex // If AcceptBlockHeader returned true, it set pindex
assert(pindex); assert(pindex);
@ -1868,9 +1881,8 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
// Dirty hack to jump to BLOCKTXN code (TODO: move message handling into their own functions) // Dirty hack to jump to BLOCKTXN code (TODO: move message handling into their own functions)
BlockTransactions txn; BlockTransactions txn;
txn.blockhash = cmpctblock.header.GetHash(); txn.blockhash = cmpctblock.header.GetHash();
CDataStream blockTxnMsg(SER_NETWORK, PROTOCOL_VERSION);
blockTxnMsg << txn; blockTxnMsg << txn;
return ProcessMessage(pfrom, NetMsgType::BLOCKTXN, blockTxnMsg, nTimeReceived, chainparams, connman); fProcessBLOCKTXN = true;
} else { } else {
req.blockhash = pindex->GetBlockHash(); req.blockhash = pindex->GetBlockHash();
connman.PushMessage(pfrom, msgMaker.Make(NetMsgType::GETBLOCKTXN, req)); connman.PushMessage(pfrom, msgMaker.Make(NetMsgType::GETBLOCKTXN, req));
@ -1906,11 +1918,17 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
// Dirty hack to process as if it were just a headers message (TODO: move message handling into their own functions) // Dirty hack to process as if it were just a headers message (TODO: move message handling into their own functions)
std::vector<CBlock> headers; std::vector<CBlock> headers;
headers.push_back(cmpctblock.header); headers.push_back(cmpctblock.header);
CDataStream vHeadersMsg(SER_NETWORK, PROTOCOL_VERSION);
vHeadersMsg << headers; vHeadersMsg << headers;
return ProcessMessage(pfrom, NetMsgType::HEADERS, vHeadersMsg, nTimeReceived, chainparams, connman); fRevertToHeaderProcessing = true;
} }
} }
} // cs_main
if (fProcessBLOCKTXN)
return ProcessMessage(pfrom, NetMsgType::BLOCKTXN, blockTxnMsg, nTimeReceived, chainparams, connman);
if (fRevertToHeaderProcessing)
return ProcessMessage(pfrom, NetMsgType::HEADERS, vHeadersMsg, nTimeReceived, chainparams, connman);
if (fBlockReconstructed) { if (fBlockReconstructed) {
// If we got here, we were able to optimistically reconstruct a // If we got here, we were able to optimistically reconstruct a