diff options
| -rw-r--r-- | src/validation.cpp | 36 |
1 files changed, 27 insertions, 9 deletions
diff --git a/src/validation.cpp b/src/validation.cpp index 866c26a31f..81b22a7e1f 100644 --- a/src/validation.cpp +++ b/src/validation.cpp @@ -1769,19 +1769,24 @@ DisconnectResult CChainState::DisconnectBlock(const CBlock& block, const CBlockI return fClean ? DISCONNECT_OK : DISCONNECT_UNCLEAN; } -void static FlushBlockFile(bool fFinalize = false) +static void FlushUndoFile(int block_file, bool finalize = false) { - LOCK(cs_LastBlockFile); + FlatFilePos undo_pos_old(block_file, vinfoBlockFile[block_file].nUndoSize); + if (!UndoFileSeq().Flush(undo_pos_old, finalize)) { + AbortNode("Flushing undo file to disk failed. This is likely the result of an I/O error."); + } +} +static void FlushBlockFile(bool fFinalize = false, bool finalize_undo = false) +{ + LOCK(cs_LastBlockFile); FlatFilePos block_pos_old(nLastBlockFile, vinfoBlockFile[nLastBlockFile].nSize); - FlatFilePos undo_pos_old(nLastBlockFile, vinfoBlockFile[nLastBlockFile].nUndoSize); - - bool status = true; - status &= BlockFileSeq().Flush(block_pos_old, fFinalize); - status &= UndoFileSeq().Flush(undo_pos_old, fFinalize); - if (!status) { + if (!BlockFileSeq().Flush(block_pos_old, fFinalize)) { AbortNode("Flushing block file to disk failed. This is likely the result of an I/O error."); } + // we do not always flush the undo file, as the chain tip may be lagging behind the incoming blocks, + // e.g. during IBD or a sync after a node going offline + if (!fFinalize || finalize_undo) FlushUndoFile(nLastBlockFile, finalize_undo); } static bool FindUndoPos(BlockValidationState &state, int nFile, FlatFilePos &pos, unsigned int nAddSize); @@ -1795,6 +1800,14 @@ static bool WriteUndoDataForBlock(const CBlockUndo& blockundo, BlockValidationSt return error("ConnectBlock(): FindUndoPos failed"); if (!UndoWriteToDisk(blockundo, _pos, pindex->pprev->GetBlockHash(), chainparams.MessageStart())) return AbortNode(state, "Failed to write undo data"); + // rev files are written in block height order, whereas blk files are written as blocks come in (often out of order) + // we want to flush the rev (undo) file once we've written the last block, which is indicated by the last height + // in the block file info as below; note that this does not catch the case where the undo writes are keeping up + // with the block writes (usually when a synced up node is getting newly mined blocks) -- this case is caught in + // the FindBlockPos function + if (_pos.nFile < nLastBlockFile && static_cast<uint32_t>(pindex->nHeight) == vinfoBlockFile[_pos.nFile].nHeightLast) { + FlushUndoFile(_pos.nFile, true); + } // update nUndoPos in block index pindex->nUndoPos = _pos.nPos; @@ -3244,8 +3257,13 @@ static bool FindBlockPos(FlatFilePos &pos, unsigned int nAddSize, unsigned int n vinfoBlockFile.resize(nFile + 1); } + bool finalize_undo = false; if (!fKnown) { while (vinfoBlockFile[nFile].nSize + nAddSize >= MAX_BLOCKFILE_SIZE) { + // when the undo file is keeping up with the block file, we want to flush it explicitly + // when it is lagging behind (more blocks arrive than are being connected), we let the + // undo block write case handle it + finalize_undo = (vinfoBlockFile[nFile].nHeightLast == (unsigned int)ChainActive().Tip()->nHeight); nFile++; if (vinfoBlockFile.size() <= nFile) { vinfoBlockFile.resize(nFile + 1); @@ -3259,7 +3277,7 @@ static bool FindBlockPos(FlatFilePos &pos, unsigned int nAddSize, unsigned int n if (!fKnown) { LogPrintf("Leaving block file %i: %s\n", nLastBlockFile, vinfoBlockFile[nLastBlockFile].ToString()); } - FlushBlockFile(!fKnown); + FlushBlockFile(!fKnown, finalize_undo); nLastBlockFile = nFile; } |