gaspersic/go-ethereum
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

all: integrate the freezer with fast sync

Browse Source 
* all: freezer style syncing

core, eth, les, light: clean up freezer relative APIs

core, eth, les, trie, ethdb, light: clean a bit

core, eth, les, light: add unit tests

core, light: rewrite setHead function

core, eth: fix downloader unit tests

core: add receipt chain insertion test

core: use constant instead of hardcoding table name

core: fix rollback

core: fix setHead

core/rawdb: remove canonical block first and then iterate side chain

core/rawdb, ethdb: add hasAncient interface

eth/downloader: calculate ancient limit via cht first

core, eth, ethdb: lots of fixes

* eth/downloader: print ancient disable log only for fast sync
This commit is contained in:
gary rong
2019-04-25 22:59:48 +08:00
committed by Péter Szilágyi
parent b6cac42e9f
commit 80469bea0c
26 changed files with 1076 additions and 326 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
eth/downloader/downloader.go
View File

@ -129,6 +129,7 @@ type Downloader struct {
synchronising int32
notified int32
committed int32
ancientLimit uint64 // The maximum block number which can be regarded as ancient data.
// Channels
headerCh chan dataPack // [eth/62] Channel receiving inbound block headers
@ -206,7 +207,7 @@ type BlockChain interface {
InsertChain(types.Blocks) (int, error)
// InsertReceiptChain inserts a batch of receipts into the local chain.
InsertReceiptChain(types.Blocks, []types.Receipts) (int, error)
InsertReceiptChain(types.Blocks, []types.Receipts, uint64) (int, error)
}
// New creates a new downloader to fetch hashes and blocks from remote peers.
@ -475,12 +476,49 @@ func (d *Downloader) syncWithPeer(p *peerConnection, hash common.Hash, td *big.I
if d.mode == FastSync && pivot != 0 {
d.committed = 0
}
if d.mode == FastSync {
// Set the ancient data limitation.
// If we are running fast sync, all block data not greater than ancientLimit will
// be written to the ancient store. Otherwise, block data will be written to active
// database and then wait freezer to migrate.
//
// If there is checkpoint available, then calculate the ancientLimit through
// checkpoint. Otherwise calculate the ancient limit through the advertised
// height by remote peer.
//
// The reason for picking checkpoint first is: there exists an attack vector
// for height that: a malicious peer can give us a fake(very high) height,
// so that the ancient limit is also very high. And then the peer start to
// feed us valid blocks until head. All of these blocks might be written into
// the ancient store, the safe region for freezer is not enough.
if d.checkpoint != 0 && d.checkpoint > MaxForkAncestry+1 {
d.ancientLimit = height - MaxForkAncestry - 1
} else if height > MaxForkAncestry+1 {
d.ancientLimit = height - MaxForkAncestry - 1
}
frozen, _ := d.stateDB.Ancients() // Ignore the error here since light client can also hit here.
// If a part of blockchain data has already been written into active store,
// disable the ancient style insertion explicitly.
if origin >= frozen && frozen != 0 {
d.ancientLimit = 0
log.Info("Disabling direct-ancient mode", "origin", origin, "ancient", frozen-1)
} else if d.ancientLimit > 0 {
log.Debug("Enabling direct-ancient mode", "ancient", d.ancientLimit)
}
// Rewind the ancient store and blockchain if reorg happens.
if origin+1 < frozen {
var hashes []common.Hash
for i := origin + 1; i < d.lightchain.CurrentHeader().Number.Uint64(); i++ {
hashes = append(hashes, rawdb.ReadCanonicalHash(d.stateDB, i))
}
d.lightchain.Rollback(hashes)
}
}
// Initiate the sync using a concurrent header and content retrieval algorithm
d.queue.Prepare(origin+1, d.mode)
if d.syncInitHook != nil {
d.syncInitHook(origin, height)
}
fetchers := []func() error{
func() error { return d.fetchHeaders(p, origin+1, pivot) }, // Headers are always retrieved
func() error { return d.fetchBodies(origin + 1) }, // Bodies are retrieved during normal and fast sync
@ -544,6 +582,9 @@ func (d *Downloader) cancel() {
func (d *Downloader) Cancel() {
d.cancel()
d.cancelWg.Wait()
d.ancientLimit = 0
log.Debug("Reset ancient limit to zero")
}
// Terminate interrupts the downloader, canceling all pending operations.
@ -1315,7 +1356,7 @@ func (d *Downloader) fetchParts(errCancel error, deliveryCh chan dataPack, deliv
// queue until the stream ends or a failure occurs.
func (d *Downloader) processHeaders(origin uint64, pivot uint64, td *big.Int) error {
// Keep a count of uncertain headers to roll back
rollback := []*types.Header{}
var rollback []*types.Header
defer func() {
if len(rollback) > 0 {
// Flatten the headers and roll them back
@ -1409,11 +1450,10 @@ func (d *Downloader) processHeaders(origin uint64, pivot uint64, td *big.Int) er
limit = len(headers)
}
chunk := headers[:limit]
// In case of header only syncing, validate the chunk immediately
if d.mode == FastSync || d.mode == LightSync {
// Collect the yet unknown headers to mark them as uncertain
unknown := make([]*types.Header, 0, len(headers))
unknown := make([]*types.Header, 0, len(chunk))
for _, header := range chunk {
if !d.lightchain.HasHeader(header.Hash(), header.Number.Uint64()) {
unknown = append(unknown, header)
@ -1663,7 +1703,7 @@ func (d *Downloader) commitFastSyncData(results []*fetchResult, stateSync *state
blocks[i] = types.NewBlockWithHeader(result.Header).WithBody(result.Transactions, result.Uncles)
receipts[i] = result.Receipts
}
if index, err := d.blockchain.InsertReceiptChain(blocks, receipts); err != nil {
if index, err := d.blockchain.InsertReceiptChain(blocks, receipts, d.ancientLimit); err != nil {
log.Debug("Downloaded item processing failed", "number", results[index].Header.Number, "hash", results[index].Header.Hash(), "err", err)
return errInvalidChain
}
@ -1675,7 +1715,7 @@ func (d *Downloader) commitPivotBlock(result *fetchResult) error {
log.Debug("Committing fast sync pivot as new head", "number", block.Number(), "hash", block.Hash())
// Commit the pivot block as the new head, will require full sync from here on
if _, err := d.blockchain.InsertReceiptChain([]*types.Block{block}, []types.Receipts{result.Receipts}); err != nil {
if _, err := d.blockchain.InsertReceiptChain([]*types.Block{block}, []types.Receipts{result.Receipts}, d.ancientLimit); err != nil {
return err
}
if err := d.blockchain.FastSyncCommitHead(block.Hash()); err != nil {