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Be stricter in processing unrequested blocks

AcceptBlock will no longer process an unrequested block, unless it has not
been previously processed and has more work than chainActive.Tip()
tags/v0.15.1
Suhas Daftuar il y a 6 ans
Parent
révision
9be0e6837b
5 fichiers modifiés avec 33 ajouts et 22 suppressions
  1. 25
    15
      src/main.cpp
  2. 4
    3
      src/main.h
  3. 1
    1
      src/miner.cpp
  4. 2
    2
      src/rpcmining.cpp
  5. 1
    1
      src/test/miner_tests.cpp

+ 25
- 15
src/main.cpp Voir le fichier

@@ -296,7 +296,8 @@ void FinalizeNode(NodeId nodeid) {
}

// Requires cs_main.
void MarkBlockAsReceived(const uint256& hash) {
// Returns a bool indicating whether we requested this block.
bool MarkBlockAsReceived(const uint256& hash) {
map<uint256, pair<NodeId, list<QueuedBlock>::iterator> >::iterator itInFlight = mapBlocksInFlight.find(hash);
if (itInFlight != mapBlocksInFlight.end()) {
CNodeState *state = State(itInFlight->second.first);
@@ -306,7 +307,9 @@ void MarkBlockAsReceived(const uint256& hash) {
state->nBlocksInFlight--;
state->nStallingSince = 0;
mapBlocksInFlight.erase(itInFlight);
return true;
}
return false;
}

// Requires cs_main.
@@ -2826,7 +2829,7 @@ bool AcceptBlockHeader(const CBlockHeader& block, CValidationState& state, CBloc
return true;
}

bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex** ppindex, CDiskBlockPos* dbp)
bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex** ppindex, bool fRequested, CDiskBlockPos* dbp)
{
const CChainParams& chainparams = Params();
AssertLockHeld(cs_main);
@@ -2836,13 +2839,18 @@ bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex** ppindex,
if (!AcceptBlockHeader(block, state, &pindex))
return false;

// If we're pruning, ensure that we don't allow a peer to dump a copy
// of old blocks. But we might need blocks that are not on the main chain
// to handle a reorg, even if we've processed once.
if (pindex->nStatus & BLOCK_HAVE_DATA || chainActive.Contains(pindex)) {
// TODO: deal better with duplicate blocks.
// return state.DoS(20, error("AcceptBlock(): already have block %d %s", pindex->nHeight, pindex->GetBlockHash().ToString()), REJECT_DUPLICATE, "duplicate");
return true;
// Try to process all requested blocks that we don't have, but only
// process an unrequested block if it's new and has enough work to
// advance our tip.
bool fAlreadyHave = pindex->nStatus & BLOCK_HAVE_DATA;
bool fHasMoreWork = (chainActive.Tip() ? pindex->nChainWork > chainActive.Tip()->nChainWork : true);

// TODO: deal better with return value and error conditions for duplicate
// and unrequested blocks.
if (fAlreadyHave) return true;
if (!fRequested) { // If we didn't ask for it:
if (pindex->nTx != 0) return true; // This is a previously-processed block that was pruned
if (!fHasMoreWork) return true; // Don't process less-work chains
}

if ((!CheckBlock(block, state)) || !ContextualCheckBlock(block, state, pindex->pprev)) {
@@ -2891,21 +2899,22 @@ static bool IsSuperMajority(int minVersion, const CBlockIndex* pstart, unsigned
}


bool ProcessNewBlock(CValidationState &state, CNode* pfrom, CBlock* pblock, CDiskBlockPos *dbp)
bool ProcessNewBlock(CValidationState &state, CNode* pfrom, CBlock* pblock, bool fForceProcessing, CDiskBlockPos *dbp)
{
// Preliminary checks
bool checked = CheckBlock(*pblock, state);

{
LOCK(cs_main);
MarkBlockAsReceived(pblock->GetHash());
bool fRequested = MarkBlockAsReceived(pblock->GetHash());
fRequested |= fForceProcessing;
if (!checked) {
return error("%s: CheckBlock FAILED", __func__);
}

// Store to disk
CBlockIndex *pindex = NULL;
bool ret = AcceptBlock(*pblock, state, &pindex, dbp);
bool ret = AcceptBlock(*pblock, state, &pindex, fRequested, dbp);
if (pindex && pfrom) {
mapBlockSource[pindex->GetBlockHash()] = pfrom->GetId();
}
@@ -3453,7 +3462,7 @@ bool LoadExternalBlockFile(FILE* fileIn, CDiskBlockPos *dbp)
// process in case the block isn't known yet
if (mapBlockIndex.count(hash) == 0 || (mapBlockIndex[hash]->nStatus & BLOCK_HAVE_DATA) == 0) {
CValidationState state;
if (ProcessNewBlock(state, NULL, &block, dbp))
if (ProcessNewBlock(state, NULL, &block, true, dbp))
nLoaded++;
if (state.IsError())
break;
@@ -3475,7 +3484,7 @@ bool LoadExternalBlockFile(FILE* fileIn, CDiskBlockPos *dbp)
LogPrintf("%s: Processing out of order child %s of %s\n", __func__, block.GetHash().ToString(),
head.ToString());
CValidationState dummy;
if (ProcessNewBlock(dummy, NULL, &block, &it->second))
if (ProcessNewBlock(dummy, NULL, &block, true, &it->second))
{
nLoaded++;
queue.push_back(block.GetHash());
@@ -4462,7 +4471,8 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
pfrom->AddInventoryKnown(inv);

CValidationState state;
ProcessNewBlock(state, pfrom, &block);
// Process all blocks from whitelisted peers, even if not requested.
ProcessNewBlock(state, pfrom, &block, pfrom->fWhitelisted, NULL);
int nDoS;
if (state.IsInvalid(nDoS)) {
pfrom->PushMessage("reject", strCommand, state.GetRejectCode(),

+ 4
- 3
src/main.h Voir le fichier

@@ -153,10 +153,11 @@ void UnregisterNodeSignals(CNodeSignals& nodeSignals);
* @param[out] state This may be set to an Error state if any error occurred processing it, including during validation/connection/etc of otherwise unrelated blocks during reorganisation; or it may be set to an Invalid state if pblock is itself invalid (but this is not guaranteed even when the block is checked). If you want to *possibly* get feedback on whether pblock is valid, you must also install a CValidationInterface (see validationinterface.h) - this will have its BlockChecked method called whenever *any* block completes validation.
* @param[in] pfrom The node which we are receiving the block from; it is added to mapBlockSource and may be penalised if the block is invalid.
* @param[in] pblock The block we want to process.
* @param[in] fForceProcessing Process this block even if unrequested; used for non-network block sources and whitelisted peers.
* @param[out] dbp If pblock is stored to disk (or already there), this will be set to its location.
* @return True if state.IsValid()
*/
bool ProcessNewBlock(CValidationState &state, CNode* pfrom, CBlock* pblock, CDiskBlockPos *dbp = NULL);
bool ProcessNewBlock(CValidationState &state, CNode* pfrom, CBlock* pblock, bool fForceProcessing, CDiskBlockPos *dbp);
/** Check whether enough disk space is available for an incoming block */
bool CheckDiskSpace(uint64_t nAdditionalBytes = 0);
/** Open a block file (blk?????.dat) */
@@ -400,8 +401,8 @@ bool ContextualCheckBlock(const CBlock& block, CValidationState& state, CBlockIn
/** Check a block is completely valid from start to finish (only works on top of our current best block, with cs_main held) */
bool TestBlockValidity(CValidationState &state, const CBlock& block, CBlockIndex *pindexPrev, bool fCheckPOW = true, bool fCheckMerkleRoot = true);

/** Store block on disk. If dbp is provided, the file is known to already reside on disk */
bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex **pindex, CDiskBlockPos* dbp = NULL);
/** Store block on disk. If dbp is non-NULL, the file is known to already reside on disk */
bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex **pindex, bool fRequested, CDiskBlockPos* dbp);
bool AcceptBlockHeader(const CBlockHeader& block, CValidationState& state, CBlockIndex **ppindex= NULL);



+ 1
- 1
src/miner.cpp Voir le fichier

@@ -434,7 +434,7 @@ static bool ProcessBlockFound(CBlock* pblock, CWallet& wallet, CReserveKey& rese

// Process this block the same as if we had received it from another node
CValidationState state;
if (!ProcessNewBlock(state, NULL, pblock))
if (!ProcessNewBlock(state, NULL, pblock, true, NULL))
return error("BitcoinMiner: ProcessNewBlock, block not accepted");

return true;

+ 2
- 2
src/rpcmining.cpp Voir le fichier

@@ -164,7 +164,7 @@ Value generate(const Array& params, bool fHelp)
++pblock->nNonce;
}
CValidationState state;
if (!ProcessNewBlock(state, NULL, pblock))
if (!ProcessNewBlock(state, NULL, pblock, true, NULL))
throw JSONRPCError(RPC_INTERNAL_ERROR, "ProcessNewBlock, block not accepted");
++nHeight;
blockHashes.push_back(pblock->GetHash().GetHex());
@@ -650,7 +650,7 @@ Value submitblock(const Array& params, bool fHelp)
CValidationState state;
submitblock_StateCatcher sc(block.GetHash());
RegisterValidationInterface(&sc);
bool fAccepted = ProcessNewBlock(state, NULL, &block);
bool fAccepted = ProcessNewBlock(state, NULL, &block, true, NULL);
UnregisterValidationInterface(&sc);
if (fBlockPresent)
{

+ 1
- 1
src/test/miner_tests.cpp Voir le fichier

@@ -84,7 +84,7 @@ BOOST_AUTO_TEST_CASE(CreateNewBlock_validity)
pblock->hashMerkleRoot = pblock->BuildMerkleTree();
pblock->nNonce = blockinfo[i].nonce;
CValidationState state;
BOOST_CHECK(ProcessNewBlock(state, NULL, pblock));
BOOST_CHECK(ProcessNewBlock(state, NULL, pblock, true, NULL));
BOOST_CHECK(state.IsValid());
pblock->hashPrevBlock = pblock->GetHash();
}

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