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eth, eth/fetcher: move propagated block import into fetcher

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This commit is contained in:
Péter Szilágyi 2015-06-17 18:25:23 +03:00
parent a9ada0b5ba
commit 5ec6ecc511
4 changed files with 108 additions and 125 deletions
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2
eth/downloader/downloader.go
View File

@ -99,7 +99,7 @@ type Downloader struct {
hasBlock hashCheckFn // Checks if a block is present in the chain
getBlock blockRetrievalFn // Retrieves a block from the chain
insertChain chainInsertFn // Injects a batch of blocks into the chain
dropPeer peerDropFn // Retrieved the TD of our own chain
dropPeer peerDropFn // Drops a peer for misbehaving
// Status
synchroniseMock func(id string, hash common.Hash) error // Replacement for synchronise during testing

33
eth/fetcher/fetcher.go
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@ -29,12 +29,18 @@ type hashCheckFn func(common.Hash) bool
// blockRequesterFn is a callback type for sending a block retrieval request.
type blockRequesterFn func([]common.Hash) error
// blockImporterFn is a callback type for trying to inject a block into the local chain.
type blockImporterFn func(peer string, block *types.Block) error
// blockBroadcasterFn is a callback type for broadcasting a block to connected peers.
type blockBroadcasterFn func(block *types.Block)
// chainHeightFn is a callback type to retrieve the current chain height.
type chainHeightFn func() uint64
// chainInsertFn is a callback type to insert a batch of blocks into the local chain.
type chainInsertFn func(types.Blocks) (int, error)
// peerDropFn is a callback type for dropping a peer detected as malicious.
type peerDropFn func(id string)
// announce is the hash notification of the availability of a new block in the
// network.
type announce struct {
@ -71,12 +77,14 @@ type Fetcher struct {
// Callbacks
hasBlock hashCheckFn // Checks if a block is present in the chain
importBlock blockImporterFn // Injects a block from an origin peer into the chain
broadcastBlock blockBroadcasterFn // Broadcasts a block to connected peers
chainHeight chainHeightFn // Retrieves the current chain's height
insertChain chainInsertFn // Injects a batch of blocks into the chain
dropPeer peerDropFn // Drops a peer for misbehaving
}
// New creates a block fetcher to retrieve blocks based on hash announcements.
func New(hasBlock hashCheckFn, importBlock blockImporterFn, chainHeight chainHeightFn) *Fetcher {
func New(hasBlock hashCheckFn, broadcastBlock blockBroadcasterFn, chainHeight chainHeightFn, insertChain chainInsertFn, dropPeer peerDropFn) *Fetcher {
return &Fetcher{
notify: make(chan *announce),
inject: make(chan *inject),
@ -88,8 +96,10 @@ func New(hasBlock hashCheckFn, importBlock blockImporterFn, chainHeight chainHei
queue: prque.New(),
queued: make(map[common.Hash]struct{}),
hasBlock: hasBlock,
importBlock: importBlock,
broadcastBlock: broadcastBlock,
chainHeight: chainHeight,
insertChain: insertChain,
dropPeer: dropPeer,
}
}
@ -328,10 +338,17 @@ func (f *Fetcher) insert(peer string, block *types.Block) {
go func() {
defer func() { f.done <- hash }()
// Run the actual import and log any issues
if err := f.importBlock(peer, block); err != nil {
glog.V(logger.Detail).Infof("Peer %s: block #%d [%x] import failed: %v", peer, block.NumberU64(), hash[:4], err)
// If the parent's unknown, abort insertion
if !f.hasBlock(block.ParentHash()) {
return
}
// Run the actual import and log any issues
if _, err := f.insertChain(types.Blocks{block}); err != nil {
glog.V(logger.Detail).Infof("Peer %s: block #%d [%x] import failed: %v", peer, block.NumberU64(), hash[:4], err)
f.dropPeer(peer)
return
}
// If import succeeded, broadcast the block
go f.broadcastBlock(block)
}()
}

62
eth/fetcher/fetcher_test.go
View File

@ -80,7 +80,7 @@ func newTester() *fetcherTester {
hashes: []common.Hash{knownHash},
blocks: map[common.Hash]*types.Block{knownHash: genesis},
}
tester.fetcher = New(tester.hasBlock, tester.importBlock, tester.chainHeight)
tester.fetcher = New(tester.hasBlock, tester.broadcastBlock, tester.chainHeight, tester.insertChain, tester.dropPeer)
tester.fetcher.Start()
return tester
@ -95,23 +95,8 @@ func (f *fetcherTester) hasBlock(hash common.Hash) bool {
return ok
}
// importBlock injects a new blocks into the simulated chain.
func (f *fetcherTester) importBlock(peer string, block *types.Block) error {
f.lock.Lock()
defer f.lock.Unlock()
// Make sure the parent in known
if _, ok := f.blocks[block.ParentHash()]; !ok {
return errors.New("unknown parent")
}
// Discard any new blocks if the same height already exists
if block.NumberU64() <= f.blocks[f.hashes[len(f.hashes)-1]].NumberU64() {
return nil
}
// Otherwise build our current chain
f.hashes = append(f.hashes, block.Hash())
f.blocks[block.Hash()] = block
return nil
// broadcastBlock is a nop placeholder for the block broadcasting.
func (f *fetcherTester) broadcastBlock(block *types.Block) {
}
// chainHeight retrieves the current height (block number) of the chain.
@ -122,6 +107,31 @@ func (f *fetcherTester) chainHeight() uint64 {
return f.blocks[f.hashes[len(f.hashes)-1]].NumberU64()
}
// insertChain injects a new blocks into the simulated chain.
func (f *fetcherTester) insertChain(blocks types.Blocks) (int, error) {
f.lock.Lock()
defer f.lock.Unlock()
for i, block := range blocks {
// Make sure the parent in known
if _, ok := f.blocks[block.ParentHash()]; !ok {
return i, errors.New("unknown parent")
}
// Discard any new blocks if the same height already exists
if block.NumberU64() <= f.blocks[f.hashes[len(f.hashes)-1]].NumberU64() {
return i, nil
}
// Otherwise build our current chain
f.hashes = append(f.hashes, block.Hash())
f.blocks[block.Hash()] = block
}
return 0, nil
}
// dropPeer is a nop placeholder for the peer removal.
func (f *fetcherTester) dropPeer(peer string) {
}
// peerFetcher retrieves a fetcher associated with a simulated peer.
func (f *fetcherTester) makeFetcher(blocks map[common.Hash]*types.Block) blockRequesterFn {
// Copy all the blocks to ensure they are not tampered with
@ -330,9 +340,9 @@ func TestImportDeduplication(t *testing.T) {
fetcher := tester.makeFetcher(blocks)
counter := uint32(0)
tester.fetcher.importBlock = func(peer string, block *types.Block) error {
atomic.AddUint32(&counter, 1)
return tester.importBlock(peer, block)
tester.fetcher.insertChain = func(blocks types.Blocks) (int, error) {
atomic.AddUint32(&counter, uint32(len(blocks)))
return tester.insertChain(blocks)
}
// Announce the duplicating block, wait for retrieval, and also propagate directly
tester.fetcher.Notify("valid", hashes[0], time.Now().Add(-arriveTimeout), fetcher)
@ -400,18 +410,18 @@ func TestCompetingImports(t *testing.T) {
first := int32(1)
height := uint64(1)
tester.fetcher.importBlock = func(peer string, block *types.Block) error {
tester.fetcher.insertChain = func(blocks types.Blocks) (int, error) {
// Check for any phase reordering
if prev := atomic.LoadUint64(&height); block.NumberU64() < prev {
t.Errorf("phase reversal: have %v, want %v", block.NumberU64(), prev)
if prev := atomic.LoadUint64(&height); blocks[0].NumberU64() < prev {
t.Errorf("phase reversal: have %v, want %v", blocks[0].NumberU64(), prev)
}
atomic.StoreUint64(&height, block.NumberU64())
atomic.StoreUint64(&height, blocks[0].NumberU64())
// Sleep a bit on the first import not to race with the enqueues
if atomic.CompareAndSwapInt32(&first, 1, 0) {
time.Sleep(50 * time.Millisecond)
}
return tester.importBlock(peer, block)
return tester.insertChain(blocks)
}
// Queue up everything but with a missing link
for i := 0; i < len(hashesA)-2; i++ {

110
eth/handler.go
View File

@ -1,10 +1,8 @@
package eth
import (
"errors"
"fmt"
"math"
"math/big"
"sync"
"time"
@ -93,16 +91,10 @@ func NewProtocolManager(protocolVersion, networkId int, mux *event.TypeMux, txpo
// Construct the different synchronisation mechanisms
manager.downloader = downloader.New(manager.eventMux, manager.chainman.HasBlock, manager.chainman.GetBlock, manager.chainman.InsertChain, manager.removePeer)
importer := func(peer string, block *types.Block) error {
if p := manager.peers.Peer(peer); p != nil {
return manager.importBlock(manager.peers.Peer(peer), block, nil)
}
return errors.New("unknown peer")
}
heighter := func() uint64 {
return manager.chainman.CurrentBlock().NumberU64()
}
manager.fetcher = fetcher.New(manager.chainman.HasBlock, importer, heighter)
manager.fetcher = fetcher.New(manager.chainman.HasBlock, manager.BroadcastBlock, heighter, manager.chainman.InsertChain, manager.removePeer)
return manager
}
@ -194,7 +186,7 @@ func (pm *ProtocolManager) handle(p *peer) error {
return nil
}
func (self *ProtocolManager) handleMsg(p *peer) error {
func (pm *ProtocolManager) handleMsg(p *peer) error {
msg, err := p.rw.ReadMsg()
if err != nil {
return err
@ -224,7 +216,7 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
RemoteId: p.ID().String(),
})
}
self.txpool.AddTransactions(txs)
pm.txpool.AddTransactions(txs)
case GetBlockHashesMsg:
var request getBlockHashesMsgData
@ -236,7 +228,7 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
request.Amount = uint64(downloader.MaxHashFetch)
}
hashes := self.chainman.GetBlockHashesFromHash(request.Hash, request.Amount)
hashes := pm.chainman.GetBlockHashesFromHash(request.Hash, request.Amount)
if glog.V(logger.Debug) {
if len(hashes) == 0 {
@ -254,7 +246,7 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
if err := msgStream.Decode(&hashes); err != nil {
break
}
err := self.downloader.DeliverHashes(p.id, hashes)
err := pm.downloader.DeliverHashes(p.id, hashes)
if err != nil {
glog.V(logger.Debug).Infoln(err)
}
@ -280,7 +272,7 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
return errResp(ErrDecode, "msg %v: %v", msg, err)
}
block := self.chainman.GetBlock(hash)
block := pm.chainman.GetBlock(hash)
if block != nil {
blocks = append(blocks, block)
totalsize += block.Size()
@ -301,8 +293,8 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
blocks = nil
}
// Filter out any explicitly requested blocks, deliver the rest to the downloader
if blocks := self.fetcher.Filter(blocks); len(blocks) > 0 {
self.downloader.DeliverBlocks(p.id, blocks)
if blocks := pm.fetcher.Filter(blocks); len(blocks) > 0 {
pm.downloader.DeliverBlocks(p.id, blocks)
}
case NewBlockHashesMsg:
@ -321,15 +313,16 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
// Schedule all the unknown hashes for retrieval
unknown := make([]common.Hash, 0, len(hashes))
for _, hash := range hashes {
if !self.chainman.HasBlock(hash) {
if !pm.chainman.HasBlock(hash) {
unknown = append(unknown, hash)
}
}
for _, hash := range unknown {
self.fetcher.Notify(p.id, hash, time.Now(), p.requestBlocks)
pm.fetcher.Notify(p.id, hash, time.Now(), p.requestBlocks)
}
case NewBlockMsg:
// Retrieve and decode the propagated block
var request newBlockMsgData
if err := msg.Decode(&request); err != nil {
return errResp(ErrDecode, "%v: %v", msg, err)
@ -339,11 +332,24 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
}
request.Block.ReceivedAt = msg.ReceivedAt
// Try to import the propagated block, also making it fill any fetcher gaps
self.fetcher.Enqueue(p.id, request.Block)
if err := self.importBlock(p, request.Block, request.TD); err != nil {
return err
}
// Mark the block's arrival for whatever reason
_, chainHead, _ := pm.chainman.Status()
jsonlogger.LogJson(&logger.EthChainReceivedNewBlock{
BlockHash: request.Block.Hash().Hex(),
BlockNumber: request.Block.Number(),
ChainHeadHash: chainHead.Hex(),
BlockPrevHash: request.Block.ParentHash().Hex(),
RemoteId: p.ID().String(),
})
// Mark the peer as owning the block and schedule it for import
p.blockHashes.Add(request.Block.Hash())
p.SetHead(request.Block.Hash())
pm.fetcher.Enqueue(p.id, request.Block)
// TODO: Schedule a sync to cover potential gaps (this needs proto update)
p.SetTd(request.TD)
go pm.synchronise(p)
default:
return errResp(ErrInvalidMsgCode, "%v", msg.Code)
@ -351,61 +357,11 @@ func (self *ProtocolManager) handleMsg(p *peer) error {
return nil
}
// importBlocks injects a new block retrieved from the given peer into the chain
// manager.
func (pm *ProtocolManager) importBlock(p *peer, block *types.Block, td *big.Int) error {
hash := block.Hash()
// Mark the block as present at the remote node (don't duplicate already held data)
p.blockHashes.Add(hash)
p.SetHead(hash)
if td != nil {
p.SetTd(td)
}
// Log the block's arrival
_, chainHead, _ := pm.chainman.Status()
jsonlogger.LogJson(&logger.EthChainReceivedNewBlock{
BlockHash: hash.Hex(),
BlockNumber: block.Number(),
ChainHeadHash: chainHead.Hex(),
BlockPrevHash: block.ParentHash().Hex(),
RemoteId: p.ID().String(),
})
// If the block's already known or its difficulty is lower than ours, drop
if pm.chainman.HasBlock(hash) {
p.SetTd(pm.chainman.GetBlock(hash).Td) // update the peer's TD to the real value
return nil
}
if td != nil && pm.chainman.Td().Cmp(td) > 0 && new(big.Int).Add(block.Number(), big.NewInt(7)).Cmp(pm.chainman.CurrentBlock().Number()) < 0 {
glog.V(logger.Debug).Infof("[%s] dropped block %v due to low TD %v\n", p.id, block.Number(), td)
return nil
}
// Attempt to insert the newly received block and propagate to our peers
if pm.chainman.HasBlock(block.ParentHash()) {
if _, err := pm.chainman.InsertChain(types.Blocks{block}); err != nil {
glog.V(logger.Error).Infoln("removed peer (", p.id, ") due to block error", err)
return err
}
if td != nil && block.Td.Cmp(td) != 0 {
err := fmt.Errorf("invalid TD on block(%v) from peer(%s): block.td=%v, request.td=%v", block.Number(), p.id, block.Td, td)
glog.V(logger.Error).Infoln(err)
return err
}
pm.BroadcastBlock(hash, block)
return nil
}
// Parent of the block is unknown, try to sync with this peer if it seems to be good
if td != nil {
go pm.synchronise(p)
}
return nil
}
// BroadcastBlock will propagate the block to a subset of its connected peers,
// only notifying the rest of the block's appearance.
func (pm *ProtocolManager) BroadcastBlock(hash common.Hash, block *types.Block) {
func (pm *ProtocolManager) BroadcastBlock(block *types.Block) {
// Retrieve all the target peers and split between full broadcast or only notification
peers := pm.peers.PeersWithoutBlock(hash)
peers := pm.peers.PeersWithoutBlock(block.Hash())
split := int(math.Sqrt(float64(len(peers))))
transfer := peers[:split]
@ -413,7 +369,7 @@ func (pm *ProtocolManager) BroadcastBlock(hash common.Hash, block *types.Block)
// Send out the data transfers and the notifications
for _, peer := range notify {
peer.sendNewBlockHashes([]common.Hash{hash})
peer.sendNewBlockHashes([]common.Hash{block.Hash()})
}
glog.V(logger.Detail).Infoln("broadcast hash to", len(notify), "peers.")
@ -442,7 +398,7 @@ func (self *ProtocolManager) minedBroadcastLoop() {
for obj := range self.minedBlockSub.Chan() {
switch ev := obj.(type) {
case core.NewMinedBlockEvent:
self.BroadcastBlock(ev.Block.Hash(), ev.Block)
self.BroadcastBlock(ev.Block)
}
}
}