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-rw-r--r--src/validation.cpp90
1 files changed, 50 insertions, 40 deletions
diff --git a/src/validation.cpp b/src/validation.cpp
index dd4436c9cf..8f7e9fba69 100644
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -2789,64 +2789,74 @@ bool PreciousBlock(CValidationState& state, const CChainParams& params, CBlockIn
bool CChainState::InvalidateBlock(CValidationState& state, const CChainParams& chainparams, CBlockIndex *pindex)
{
- LOCK(cs_main);
-
- // We first disconnect backwards and then mark the blocks as invalid.
- // This prevents a case where pruned nodes may fail to invalidateblock
- // and be left unable to start as they have no tip candidates (as there
- // are no blocks that meet the "have data and are not invalid per
- // nStatus" criteria for inclusion in setBlockIndexCandidates).
-
+ CBlockIndex* to_mark_failed = pindex;
bool pindex_was_in_chain = false;
- CBlockIndex *invalid_walk_tip = chainActive.Tip();
- DisconnectedBlockTransactions disconnectpool;
- while (chainActive.Contains(pindex)) {
+ // Disconnect (descendants of) pindex, and mark them invalid.
+ while (true) {
+ if (ShutdownRequested()) break;
+
+ LOCK(cs_main);
+ if (!chainActive.Contains(pindex)) break;
pindex_was_in_chain = true;
+ CBlockIndex *invalid_walk_tip = chainActive.Tip();
+
// ActivateBestChain considers blocks already in chainActive
// unconditionally valid already, so force disconnect away from it.
- if (!DisconnectTip(state, chainparams, &disconnectpool)) {
- // It's probably hopeless to try to make the mempool consistent
- // here if DisconnectTip failed, but we can try.
- UpdateMempoolForReorg(disconnectpool, false);
- return false;
- }
- }
+ DisconnectedBlockTransactions disconnectpool;
+ bool ret = DisconnectTip(state, chainparams, &disconnectpool);
+ // DisconnectTip will add transactions to disconnectpool.
+ // Adjust the mempool to be consistent with the new tip, adding
+ // transactions back to the mempool if disconnecting was succesful.
+ UpdateMempoolForReorg(disconnectpool, /* fAddToMempool = */ ret);
+ if (!ret) return false;
+ assert(invalid_walk_tip->pprev == chainActive.Tip());
- // Now mark the blocks we just disconnected as descendants invalid
- // (note this may not be all descendants).
- while (pindex_was_in_chain && invalid_walk_tip != pindex) {
+ // We immediately mark the disconnected blocks as invalid.
+ // This prevents a case where pruned nodes may fail to invalidateblock
+ // and be left unable to start as they have no tip candidates (as there
+ // are no blocks that meet the "have data and are not invalid per
+ // nStatus" criteria for inclusion in setBlockIndexCandidates).
invalid_walk_tip->nStatus |= BLOCK_FAILED_CHILD;
setDirtyBlockIndex.insert(invalid_walk_tip);
setBlockIndexCandidates.erase(invalid_walk_tip);
- invalid_walk_tip = invalid_walk_tip->pprev;
+ setBlockIndexCandidates.insert(invalid_walk_tip->pprev);
+
+ // If we abort invalidation after this iteration, make sure
+ // the last disconnected block gets marked failed (rather than
+ // just child of failed)
+ to_mark_failed = invalid_walk_tip;
}
- // Mark the block itself as invalid.
- pindex->nStatus |= BLOCK_FAILED_VALID;
- setDirtyBlockIndex.insert(pindex);
- setBlockIndexCandidates.erase(pindex);
- m_failed_blocks.insert(pindex);
+ {
+ // Mark pindex (or the last disconnected block) as invalid, regardless of whether it was in the main chain or not.
+ LOCK(cs_main);
+ if (chainActive.Contains(to_mark_failed)) {
+ // If the to-be-marked invalid block is in the active chain, something is interfering and we can't proceed.
+ return false;
+ }
- // DisconnectTip will add transactions to disconnectpool; try to add these
- // back to the mempool.
- UpdateMempoolForReorg(disconnectpool, true);
+ to_mark_failed->nStatus |= BLOCK_FAILED_VALID;
+ setDirtyBlockIndex.insert(to_mark_failed);
+ setBlockIndexCandidates.erase(to_mark_failed);
+ m_failed_blocks.insert(to_mark_failed);
- // The resulting new best tip may not be in setBlockIndexCandidates anymore, so
- // add it again.
- BlockMap::iterator it = mapBlockIndex.begin();
- while (it != mapBlockIndex.end()) {
- if (it->second->IsValid(BLOCK_VALID_TRANSACTIONS) && it->second->HaveTxsDownloaded() && !setBlockIndexCandidates.value_comp()(it->second, chainActive.Tip())) {
- setBlockIndexCandidates.insert(it->second);
+ // The resulting new best tip may not be in setBlockIndexCandidates anymore, so
+ // add it again.
+ BlockMap::iterator it = mapBlockIndex.begin();
+ while (it != mapBlockIndex.end()) {
+ if (it->second->IsValid(BLOCK_VALID_TRANSACTIONS) && it->second->HaveTxsDownloaded() && !setBlockIndexCandidates.value_comp()(it->second, chainActive.Tip())) {
+ setBlockIndexCandidates.insert(it->second);
+ }
+ it++;
}
- it++;
- }
- InvalidChainFound(pindex);
+ InvalidChainFound(to_mark_failed);
+ }
// Only notify about a new block tip if the active chain was modified.
if (pindex_was_in_chain) {
- uiInterface.NotifyBlockTip(IsInitialBlockDownload(), pindex->pprev);
+ uiInterface.NotifyBlockTip(IsInitialBlockDownload(), to_mark_failed->pprev);
}
return true;
}