From cf0277928fa8d955d75f661021845789194dfff7 Mon Sep 17 00:00:00 2001 From: "Wladimir J. van der Laan" Date: Fri, 20 Apr 2018 11:21:08 +0200 Subject: Add logging and error handling for file syncing Add logging and error handling inside, and outside of FileCommit. Functions such as fsync, fdatasync will return error in case of hardware I/O errors, and ignoring this means it can silently continue through data corruption. (c.f. https://lwn.net/SubscriberLink/752063/12b232ab5039efbe/) --- src/validation.cpp | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) (limited to 'src/validation.cpp') diff --git a/src/validation.cpp b/src/validation.cpp index daa33d3f5a..158bdcc63f 100644 --- a/src/validation.cpp +++ b/src/validation.cpp @@ -1615,22 +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); @@ -4760,7 +4765,8 @@ 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(); -- cgit v1.2.3