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Merge pull request #2145 from sipa/checkcoins

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Coin database checks
This commit is contained in:
Gregory Maxwell
2013-01-11 06:27:30 -08:00
parent 45a1ec51b1 1f355b66cd
commit 1f4b80a437
3 changed files with 147 additions and 43 deletions
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55
src/main.h
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@@ -128,6 +128,8 @@ FILE* OpenUndoFile(const CDiskBlockPos &pos, bool fReadOnly = false);
bool LoadExternalBlockFile(FILE* fileIn, CDiskBlockPos *dbp = NULL);
/** Load the block tree and coins database from disk */
bool LoadBlockIndex();
/** Verify consistency of the block and coin databases */
bool VerifyDB();
/** Print the loaded block tree */
void PrintBlockTree();
/** Find a block by height in the currently-connected chain */
@@ -748,7 +750,7 @@ public:
READWRITE(vtxundo);
)
bool WriteToDisk(CDiskBlockPos &pos)
bool WriteToDisk(CDiskBlockPos &pos, const uint256 &hashBlock)
{
// Open history file to append
CAutoFile fileout = CAutoFile(OpenUndoFile(pos), SER_DISK, CLIENT_VERSION);
@@ -766,6 +768,12 @@ public:
pos.nPos = (unsigned int)fileOutPos;
fileout << *this;
// calculate & write checksum
CHashWriter hasher(SER_GETHASH, PROTOCOL_VERSION);
hasher << hashBlock;
hasher << *this;
fileout << hasher.GetHash();
// Flush stdio buffers and commit to disk before returning
fflush(fileout);
if (!IsInitialBlockDownload())
@@ -773,6 +781,44 @@ public:
return true;
}
bool ReadFromDisk(const CDiskBlockPos &pos, const uint256 &hashBlock)
{
// Open history file to read
CAutoFile filein = CAutoFile(OpenUndoFile(pos, true), SER_DISK, CLIENT_VERSION);
if (!filein)
return error("CBlockUndo::ReadFromDisk() : OpenBlockFile failed");
// Read block
uint256 hashChecksum;
try {
filein >> *this;
}
catch (std::exception &e) {
return error("%s() : deserialize or I/O error", __PRETTY_FUNCTION__);
}
// for compatibility with pre-release code that didn't write checksums to undo data
// TODO: replace by a simply 'filein >> hashChecksum' in the above try block
try {
filein >> hashChecksum;
} catch (std::exception &e) {
hashChecksum = 0;
}
uint32_t hashInit = hashChecksum.Get64(0) & 0xFFFFFFFFUL;
if (hashChecksum == 0 || memcmp(&hashInit, pchMessageStart, 4) == 0)
return true;
// Verify checksum
CHashWriter hasher(SER_GETHASH, PROTOCOL_VERSION);
hasher << hashBlock;
hasher << *this;
if (hashChecksum != hasher.GetHash())
return error("CBlockUndo::ReadFromDisk() : checksum mismatch");
return true;
}
};
/** pruned version of CTransaction: only retains metadata and unspent transaction outputs
@@ -1307,8 +1353,11 @@ public:
}
// Undo the effects of this block (with given index) on the UTXO set represented by coins
bool DisconnectBlock(CBlockIndex *pindex, CCoinsViewCache &coins);
/** Undo the effects of this block (with given index) on the UTXO set represented by coins.
* In case pfClean is provided, operation will try to be tolerant about errors, and *pfClean
* will be true if no problems were found. Otherwise, the return value will be false in case
* of problems. Note that in any case, coins may be modified. */
bool DisconnectBlock(CBlockIndex *pindex, CCoinsViewCache &coins, bool *pfClean = NULL);
// Apply the effects of this block (with given index) on the UTXO set represented by coins
bool ConnectBlock(CBlockIndex *pindex, CCoinsViewCache &coins, bool fJustCheck=false);