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-rw-r--r--src/validation.cpp117
1 files changed, 81 insertions, 36 deletions
diff --git a/src/validation.cpp b/src/validation.cpp
index cbbc857fd..3a03d206c 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -142,7 +142,7 @@ private:
* ahead and mark descendants of invalid blocks as FAILED_CHILD at that time,
* instead of putting things in this set.
*/
- std::set<CBlockIndex*> g_failed_blocks;
+ std::set<CBlockIndex*> m_failed_blocks;
public:
CChain chainActive;
@@ -264,7 +264,8 @@ CBlockIndex* FindForkInGlobalIndex(const CChain& chain, const CBlockLocator& loc
{
AssertLockHeld(cs_main);
- // Find the first block the caller has in the main chain
+ // Find the latest block common to locator and chain - we expect that
+ // locator.vHave is sorted descending by height.
for (const uint256& hash : locator.vHave) {
CBlockIndex* pindex = LookupBlockIndex(hash);
if (pindex) {
@@ -353,7 +354,7 @@ bool CheckSequenceLocks(const CTransaction &tx, int flags, LockPoints* lp, bool
CBlockIndex* tip = chainActive.Tip();
assert(tip != nullptr);
-
+
CBlockIndex index;
index.pprev = tip;
// CheckSequenceLocks() uses chainActive.Height()+1 to evaluate
@@ -1285,7 +1286,7 @@ void static InvalidChainFound(CBlockIndex* pindexNew)
void CChainState::InvalidBlockFound(CBlockIndex *pindex, const CValidationState &state) {
if (!state.CorruptionPossible()) {
pindex->nStatus |= BLOCK_FAILED_VALID;
- g_failed_blocks.insert(pindex);
+ m_failed_blocks.insert(pindex);
setDirtyBlockIndex.insert(pindex);
setBlockIndexCandidates.erase(pindex);
InvalidChainFound(pindex);
@@ -1614,22 +1615,27 @@ void static FlushBlockFile(bool fFinalize = false)
LOCK(cs_LastBlockFile);
CDiskBlockPos posOld(nLastBlockFile, 0);
+ bool status = true;
FILE *fileOld = OpenBlockFile(posOld);
if (fileOld) {
if (fFinalize)
- TruncateFile(fileOld, vinfoBlockFile[nLastBlockFile].nSize);
- FileCommit(fileOld);
+ status &= TruncateFile(fileOld, vinfoBlockFile[nLastBlockFile].nSize);
+ status &= FileCommit(fileOld);
fclose(fileOld);
}
fileOld = OpenUndoFile(posOld);
if (fileOld) {
if (fFinalize)
- TruncateFile(fileOld, vinfoBlockFile[nLastBlockFile].nUndoSize);
- FileCommit(fileOld);
+ status &= TruncateFile(fileOld, vinfoBlockFile[nLastBlockFile].nUndoSize);
+ status &= FileCommit(fileOld);
fclose(fileOld);
}
+
+ if (!status) {
+ AbortNode("Flushing block file to disk failed. This is likely the result of an I/O error.");
+ }
}
static bool FindUndoPos(CValidationState &state, int nFile, CDiskBlockPos &pos, unsigned int nAddSize);
@@ -1725,16 +1731,38 @@ public:
// Protected by cs_main
static ThresholdConditionCache warningcache[VERSIONBITS_NUM_BITS];
+// 0.13.0 was shipped with a segwit deployment defined for testnet, but not for
+// mainnet. We no longer need to support disabling the segwit deployment
+// except for testing purposes, due to limitations of the functional test
+// environment. See test/functional/p2p-segwit.py.
+static bool IsScriptWitnessEnabled(const Consensus::Params& params)
+{
+ return params.vDeployments[Consensus::DEPLOYMENT_SEGWIT].nTimeout != 0;
+}
+
static unsigned int GetBlockScriptFlags(const CBlockIndex* pindex, const Consensus::Params& consensusparams) {
AssertLockHeld(cs_main);
unsigned int flags = SCRIPT_VERIFY_NONE;
- // Start enforcing P2SH (BIP16)
- if (pindex->nHeight >= consensusparams.BIP16Height) {
+ // BIP16 didn't become active until Apr 1 2012 (on mainnet, and
+ // retroactively applied to testnet)
+ // However, only one historical block violated the P2SH rules (on both
+ // mainnet and testnet), so for simplicity, always leave P2SH
+ // on except for the one violating block.
+ if (consensusparams.BIP16Exception.IsNull() || // no bip16 exception on this chain
+ pindex->phashBlock == nullptr || // this is a new candidate block, eg from TestBlockValidity()
+ *pindex->phashBlock != consensusparams.BIP16Exception) // this block isn't the historical exception
+ {
flags |= SCRIPT_VERIFY_P2SH;
}
+ // Enforce WITNESS rules whenever P2SH is in effect (and the segwit
+ // deployment is defined).
+ if (flags & SCRIPT_VERIFY_P2SH && IsScriptWitnessEnabled(consensusparams)) {
+ flags |= SCRIPT_VERIFY_WITNESS;
+ }
+
// Start enforcing the DERSIG (BIP66) rule
if (pindex->nHeight >= consensusparams.BIP66Height) {
flags |= SCRIPT_VERIFY_DERSIG;
@@ -1750,9 +1778,7 @@ static unsigned int GetBlockScriptFlags(const CBlockIndex* pindex, const Consens
flags |= SCRIPT_VERIFY_CHECKSEQUENCEVERIFY;
}
- // Start enforcing WITNESS rules using versionbits logic.
- if (IsWitnessEnabled(pindex->pprev, consensusparams)) {
- flags |= SCRIPT_VERIFY_WITNESS;
+ if (IsNullDummyEnabled(pindex->pprev, consensusparams)) {
flags |= SCRIPT_VERIFY_NULLDUMMY;
}
@@ -2180,14 +2206,18 @@ bool static FlushStateToDisk(const CChainParams& chainparams, CValidationState &
void FlushStateToDisk() {
CValidationState state;
const CChainParams& chainparams = Params();
- FlushStateToDisk(chainparams, state, FlushStateMode::ALWAYS);
+ if (!FlushStateToDisk(chainparams, state, FlushStateMode::ALWAYS)) {
+ LogPrintf("%s: failed to flush state (%s)\n", __func__, FormatStateMessage(state));
+ }
}
void PruneAndFlush() {
CValidationState state;
fCheckForPruning = true;
const CChainParams& chainparams = Params();
- FlushStateToDisk(chainparams, state, FlushStateMode::NONE);
+ if (!FlushStateToDisk(chainparams, state, FlushStateMode::NONE)) {
+ LogPrintf("%s: failed to flush state (%s)\n", __func__, FormatStateMessage(state));
+ }
}
static void DoWarning(const std::string& strWarning)
@@ -2677,18 +2707,17 @@ bool CChainState::ActivateBestChain(CValidationState &state, const CChainParams&
assert(trace.pblock && trace.pindex);
GetMainSignals().BlockConnected(trace.pblock, trace.pindex, trace.conflictedTxs);
}
- }
- // When we reach this point, we switched to a new tip (stored in pindexNewTip).
-
- // Notifications/callbacks that can run without cs_main
- // Notify external listeners about the new tip.
- GetMainSignals().UpdatedBlockTip(pindexNewTip, pindexFork, fInitialDownload);
+ // Notify external listeners about the new tip.
+ // Enqueue while holding cs_main to ensure that UpdatedBlockTip is called in the order in which blocks are connected
+ GetMainSignals().UpdatedBlockTip(pindexNewTip, pindexFork, fInitialDownload);
- // Always notify the UI if a new block tip was connected
- if (pindexFork != pindexNewTip) {
- uiInterface.NotifyBlockTip(fInitialDownload, pindexNewTip);
+ // Always notify the UI if a new block tip was connected
+ if (pindexFork != pindexNewTip) {
+ uiInterface.NotifyBlockTip(fInitialDownload, pindexNewTip);
+ }
}
+ // When we reach this point, we switched to a new tip (stored in pindexNewTip).
if (nStopAtHeight && pindexNewTip && pindexNewTip->nHeight >= nStopAtHeight) StartShutdown();
@@ -2783,7 +2812,7 @@ bool CChainState::InvalidateBlock(CValidationState& state, const CChainParams& c
pindex->nStatus |= BLOCK_FAILED_VALID;
setDirtyBlockIndex.insert(pindex);
setBlockIndexCandidates.erase(pindex);
- g_failed_blocks.insert(pindex);
+ m_failed_blocks.insert(pindex);
// DisconnectTip will add transactions to disconnectpool; try to add these
// back to the mempool.
@@ -2829,7 +2858,7 @@ bool CChainState::ResetBlockFailureFlags(CBlockIndex *pindex) {
// Reset invalid block marker if it was pointing to one of those.
pindexBestInvalid = nullptr;
}
- g_failed_blocks.erase(it->second);
+ m_failed_blocks.erase(it->second);
}
it++;
}
@@ -3099,6 +3128,12 @@ bool IsWitnessEnabled(const CBlockIndex* pindexPrev, const Consensus::Params& pa
return (VersionBitsState(pindexPrev, params, Consensus::DEPLOYMENT_SEGWIT, versionbitscache) == ThresholdState::ACTIVE);
}
+bool IsNullDummyEnabled(const CBlockIndex* pindexPrev, const Consensus::Params& params)
+{
+ LOCK(cs_main);
+ return (VersionBitsState(pindexPrev, params, Consensus::DEPLOYMENT_SEGWIT, versionbitscache) == ThresholdState::ACTIVE);
+}
+
// Compute at which vout of the block's coinbase transaction the witness
// commitment occurs, or -1 if not found.
static int GetWitnessCommitmentIndex(const CBlock& block)
@@ -3323,7 +3358,7 @@ bool CChainState::AcceptBlockHeader(const CBlockHeader& block, CValidationState&
return error("%s: Consensus::ContextualCheckBlockHeader: %s, %s", __func__, hash.ToString(), FormatStateMessage(state));
if (!pindexPrev->IsValid(BLOCK_VALID_SCRIPTS)) {
- for (const CBlockIndex* failedit : g_failed_blocks) {
+ for (const CBlockIndex* failedit : m_failed_blocks) {
if (pindexPrev->GetAncestor(failedit->nHeight) == failedit) {
assert(failedit->nStatus & BLOCK_FAILED_VALID);
CBlockIndex* invalid_walk = pindexPrev;
@@ -3489,7 +3524,7 @@ bool ProcessNewBlock(const CChainParams& chainparams, const std::shared_ptr<cons
}
if (!ret) {
GetMainSignals().BlockChecked(*pblock, state);
- return error("%s: AcceptBlock FAILED (%s)", __func__, state.GetDebugMessage());
+ return error("%s: AcceptBlock FAILED (%s)", __func__, FormatStateMessage(state));
}
}
@@ -3497,7 +3532,7 @@ bool ProcessNewBlock(const CChainParams& chainparams, const std::shared_ptr<cons
CValidationState state; // Only used to report errors, not invalidity - ignore it
if (!g_chainstate.ActivateBestChain(state, chainparams, pblock))
- return error("%s: ActivateBestChain failed", __func__);
+ return error("%s: ActivateBestChain failed (%s)", __func__, FormatStateMessage(state));
return true;
}
@@ -3615,7 +3650,9 @@ void PruneBlockFilesManual(int nManualPruneHeight)
{
CValidationState state;
const CChainParams& chainparams = Params();
- FlushStateToDisk(chainparams, state, FlushStateMode::NONE, nManualPruneHeight);
+ if (!FlushStateToDisk(chainparams, state, FlushStateMode::NONE, nManualPruneHeight)) {
+ LogPrintf("%s: failed to flush state (%s)\n", __func__, FormatStateMessage(state));
+ }
}
/**
@@ -3869,6 +3906,7 @@ bool LoadChainTip(const CChainParams& chainparams)
LogPrintf("%s: Connecting genesis block...\n", __func__);
CValidationState state;
if (!ActivateBestChain(state, chainparams)) {
+ LogPrintf("%s: failed to activate chain (%s)\n", __func__, FormatStateMessage(state));
return false;
}
}
@@ -3983,7 +4021,7 @@ bool CVerifyDB::VerifyDB(const CChainParams& chainparams, CCoinsView *coinsview,
if (!ReadBlockFromDisk(block, pindex, chainparams.GetConsensus()))
return error("VerifyDB(): *** ReadBlockFromDisk failed at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
if (!g_chainstate.ConnectBlock(block, state, pindex, coins, chainparams))
- return error("VerifyDB(): *** found unconnectable block at %d, hash=%s", pindex->nHeight, pindex->GetBlockHash().ToString());
+ return error("VerifyDB(): *** found unconnectable block at %d, hash=%s (%s)", pindex->nHeight, pindex->GetBlockHash().ToString(), FormatStateMessage(state));
}
}
@@ -4091,6 +4129,9 @@ bool CChainState::RewindBlockIndex(const CChainParams& params)
int nHeight = 1;
while (nHeight <= chainActive.Height()) {
+ // Although SCRIPT_VERIFY_WITNESS is now generally enforced on all
+ // blocks in ConnectBlock, we don't need to go back and
+ // re-download/re-verify blocks from before segwit actually activated.
if (IsWitnessEnabled(chainActive[nHeight - 1], params.GetConsensus()) && !(chainActive[nHeight]->nStatus & BLOCK_OPT_WITNESS)) {
break;
}
@@ -4110,11 +4151,13 @@ bool CChainState::RewindBlockIndex(const CChainParams& params)
break;
}
if (!DisconnectTip(state, params, nullptr)) {
- return error("RewindBlockIndex: unable to disconnect block at height %i", pindex->nHeight);
+ return error("RewindBlockIndex: unable to disconnect block at height %i (%s)", pindex->nHeight, FormatStateMessage(state));
}
// Occasionally flush state to disk.
- if (!FlushStateToDisk(params, state, FlushStateMode::PERIODIC))
+ if (!FlushStateToDisk(params, state, FlushStateMode::PERIODIC)) {
+ LogPrintf("RewindBlockIndex: unable to flush state to disk (%s)\n", FormatStateMessage(state));
return false;
+ }
}
// Reduce validity flag and have-data flags.
@@ -4180,6 +4223,7 @@ bool RewindBlockIndex(const CChainParams& params) {
// it'll get called a bunch real soon.
CValidationState state;
if (!FlushStateToDisk(params, state, FlushStateMode::ALWAYS)) {
+ LogPrintf("RewindBlockIndex: unable to flush state to disk (%s)\n", FormatStateMessage(state));
return false;
}
}
@@ -4189,7 +4233,7 @@ bool RewindBlockIndex(const CChainParams& params) {
void CChainState::UnloadBlockIndex() {
nBlockSequenceId = 1;
- g_failed_blocks.clear();
+ m_failed_blocks.clear();
setBlockIndexCandidates.clear();
}
@@ -4266,7 +4310,7 @@ bool CChainState::LoadGenesisBlock(const CChainParams& chainparams)
CBlockIndex *pindex = AddToBlockIndex(block);
CValidationState state;
if (!ReceivedBlockTransactions(block, state, pindex, blockPos, chainparams.GetConsensus()))
- return error("%s: genesis block not accepted", __func__);
+ return error("%s: genesis block not accepted (%s)", __func__, FormatStateMessage(state));
} catch (const std::runtime_error& e) {
return error("%s: failed to write genesis block: %s", __func__, e.what());
}
@@ -4731,7 +4775,8 @@ bool DumpMempool(void)
}
file << mapDeltas;
- FileCommit(file.Get());
+ if (!FileCommit(file.Get()))
+ throw std::runtime_error("FileCommit failed");
file.fclose();
RenameOver(GetDataDir() / "mempool.dat.new", GetDataDir() / "mempool.dat");
int64_t last = GetTimeMicros();
generated by cgit v1.2.3 (git 2.25.1) at 2026-04-26 17:48:58 +0000