diff --git a/core/blockchain.go b/core/blockchain.go index ff372870d..6ee58ef4f 100644 --- a/core/blockchain.go +++ b/core/blockchain.go @@ -296,7 +296,7 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, chainConfig *par if diskRoot != (common.Hash{}) { log.Warn("Head state missing, repairing", "number", head.Number(), "hash", head.Hash(), "snaproot", diskRoot) - snapDisk, err := bc.SetHeadBeyondRoot(head.NumberU64(), diskRoot) + snapDisk, err := bc.setHeadBeyondRoot(head.NumberU64(), diskRoot, true) if err != nil { return nil, err } @@ -306,7 +306,7 @@ func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, chainConfig *par } } else { log.Warn("Head state missing, repairing", "number", head.Number(), "hash", head.Hash()) - if err := bc.SetHead(head.NumberU64()); err != nil { + if _, err := bc.setHeadBeyondRoot(head.NumberU64(), common.Hash{}, true); err != nil { return nil, err } } @@ -482,11 +482,11 @@ func (bc *BlockChain) loadLastState() error { // was fast synced or full synced and in which state, the method will try to // delete minimal data from disk whilst retaining chain consistency. func (bc *BlockChain) SetHead(head uint64) error { - _, err := bc.SetHeadBeyondRoot(head, common.Hash{}) + _, err := bc.setHeadBeyondRoot(head, common.Hash{}, false) return err } -// SetHeadBeyondRoot rewinds the local chain to a new head with the extra condition +// setHeadBeyondRoot rewinds the local chain to a new head with the extra condition // that the rewind must pass the specified state root. This method is meant to be // used when rewinding with snapshots enabled to ensure that we go back further than // persistent disk layer. Depending on whether the node was fast synced or full, and @@ -494,7 +494,7 @@ func (bc *BlockChain) SetHead(head uint64) error { // retaining chain consistency. // // The method returns the block number where the requested root cap was found. -func (bc *BlockChain) SetHeadBeyondRoot(head uint64, root common.Hash) (uint64, error) { +func (bc *BlockChain) setHeadBeyondRoot(head uint64, root common.Hash, repair bool) (uint64, error) { if !bc.chainmu.TryLock() { return 0, errChainStopped } @@ -509,7 +509,7 @@ func (bc *BlockChain) SetHeadBeyondRoot(head uint64, root common.Hash) (uint64, frozen, _ := bc.db.Ancients() updateFn := func(db ethdb.KeyValueWriter, header *types.Header) (uint64, bool) { - // Rewind the block chain, ensuring we don't end up with a stateless head + // Rewind the blockchain, ensuring we don't end up with a stateless head // block. Note, depth equality is permitted to allow using SetHead as a // chain reparation mechanism without deleting any data! if currentBlock := bc.CurrentBlock(); currentBlock != nil && header.Number.Uint64() <= currentBlock.NumberU64() { @@ -610,8 +610,8 @@ func (bc *BlockChain) SetHeadBeyondRoot(head uint64, root common.Hash) (uint64, } // If SetHead was only called as a chain reparation method, try to skip // touching the header chain altogether, unless the freezer is broken - if block := bc.CurrentBlock(); block.NumberU64() == head { - if target, force := updateFn(bc.db, block.Header()); force { + if repair { + if target, force := updateFn(bc.db, bc.CurrentBlock().Header()); force { bc.hc.SetHead(target, updateFn, delFn) } } else { diff --git a/eth/downloader/downloader.go b/eth/downloader/downloader.go index a6bf87acb..4ca1b55bb 100644 --- a/eth/downloader/downloader.go +++ b/eth/downloader/downloader.go @@ -535,7 +535,7 @@ func (d *Downloader) syncWithPeer(p *peerConnection, hash common.Hash, td *big.I } // Rewind the ancient store and blockchain if reorg happens. if origin+1 < frozen { - if err := d.lightchain.SetHead(origin + 1); err != nil { + if err := d.lightchain.SetHead(origin); err != nil { return err } }