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eth, eth/fetcher: propagate after header verify, announce only on insert

This commit is contained in:
Péter Szilágyi 2015-06-18 18:00:19 +03:00
parent 629705ad53
commit b91b581b80
4 changed files with 82 additions and 44 deletions
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2
eth/backend.go
View File

@ -313,7 +313,7 @@ func New(config *Config) (*Ethereum, error) {
eth.blockProcessor = core.NewBlockProcessor(stateDb, extraDb, eth.pow, eth.chainManager, eth.EventMux())
eth.chainManager.SetProcessor(eth.blockProcessor)
eth.protocolManager = NewProtocolManager(config.ProtocolVersion, config.NetworkId, eth.eventMux, eth.txPool, eth.chainManager)
eth.protocolManager = NewProtocolManager(config.ProtocolVersion, config.NetworkId, eth.eventMux, eth.txPool, eth.pow, eth.chainManager)
eth.miner = miner.New(eth, eth.EventMux(), eth.pow)
eth.miner.SetGasPrice(config.GasPrice)

45
eth/fetcher/fetcher.go
View File

@ -23,14 +23,17 @@ var (
errTerminated = errors.New("terminated")
)
// hashCheckFn is a callback type for verifying a hash's presence in the local chain.
type hashCheckFn func(common.Hash) bool
// blockRetrievalFn is a callback type for retrieving a block from the local chain.
type blockRetrievalFn func(common.Hash) *types.Block
// blockRequesterFn is a callback type for sending a block retrieval request.
type blockRequesterFn func([]common.Hash) error
// blockValidatorFn is a callback type to verify a block's header for fast propagation.
type blockValidatorFn func(block *types.Block, parent *types.Block) error
// blockBroadcasterFn is a callback type for broadcasting a block to connected peers.
type blockBroadcasterFn func(block *types.Block)
type blockBroadcasterFn func(block *types.Block, propagate bool)
// chainHeightFn is a callback type to retrieve the current chain height.
type chainHeightFn func() uint64
@ -76,7 +79,8 @@ type Fetcher struct {
queued map[common.Hash]struct{} // Presence set of already queued blocks (to dedup imports)
// Callbacks
hasBlock hashCheckFn // Checks if a block is present in the chain
getBlock blockRetrievalFn // Retrieves a block from the local chain
validateBlock blockValidatorFn // Checks if a block's headers have a valid proof of work
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
@ -84,7 +88,7 @@ type Fetcher struct {
}
// New creates a block fetcher to retrieve blocks based on hash announcements.
func New(hasBlock hashCheckFn, broadcastBlock blockBroadcasterFn, chainHeight chainHeightFn, insertChain chainInsertFn, dropPeer peerDropFn) *Fetcher {
func New(getBlock blockRetrievalFn, validateBlock blockValidatorFn, broadcastBlock blockBroadcasterFn, chainHeight chainHeightFn, insertChain chainInsertFn, dropPeer peerDropFn) *Fetcher {
return &Fetcher{
notify: make(chan *announce),
inject: make(chan *inject),
@ -95,7 +99,8 @@ func New(hasBlock hashCheckFn, broadcastBlock blockBroadcasterFn, chainHeight ch
fetching: make(map[common.Hash]*announce),
queue: prque.New(),
queued: make(map[common.Hash]struct{}),
hasBlock: hasBlock,
getBlock: getBlock,
validateBlock: validateBlock,
broadcastBlock: broadcastBlock,
chainHeight: chainHeight,
insertChain: insertChain,
@ -197,7 +202,7 @@ func (f *Fetcher) loop() {
break
}
// Otherwise if fresh and still unknown, try and import
if number <= height || f.hasBlock(op.block.Hash()) {
if number <= height || f.getBlock(op.block.Hash()) != nil {
continue
}
f.insert(op.origin, op.block)
@ -235,7 +240,7 @@ func (f *Fetcher) loop() {
for hash, announces := range f.announced {
if time.Since(announces[0].time) > arriveTimeout {
announce := announces[rand.Intn(len(announces))]
if !f.hasBlock(hash) {
if f.getBlock(hash) == nil {
request[announce.origin] = append(request[announce.origin], hash)
f.fetching[hash] = announce
}
@ -265,7 +270,7 @@ func (f *Fetcher) loop() {
// Filter explicitly requested blocks from hash announcements
if _, ok := f.fetching[hash]; ok {
// Discard if already imported by other means
if !f.hasBlock(hash) {
if f.getBlock(hash) == nil {
explicit = append(explicit, block)
} else {
delete(f.fetching, hash)
@ -313,7 +318,7 @@ func (f *Fetcher) enqueue(peer string, block *types.Block) {
// Discard any past or too distant blocks
if dist := int64(block.NumberU64()) - int64(f.chainHeight()); dist <= 0 || dist > maxQueueDist {
glog.Infof("Peer %s: discarded block #%d [%x], distance %d", peer, block.NumberU64(), hash.Bytes()[:4], dist)
glog.V(logger.Detail).Infof("Peer %s: discarded block #%d [%x], distance %d", peer, block.NumberU64(), hash.Bytes()[:4], dist)
return
}
// Schedule the block for future importing
@ -321,7 +326,7 @@ func (f *Fetcher) enqueue(peer string, block *types.Block) {
f.queued[hash] = struct{}{}
f.queue.Push(&inject{origin: peer, block: block}, -float32(block.NumberU64()))
if glog.V(logger.Detail) {
if glog.V(logger.Debug) {
glog.Infof("Peer %s: queued block #%d [%x], total %v", peer, block.NumberU64(), hash.Bytes()[:4], f.queue.Size())
}
}
@ -339,16 +344,24 @@ func (f *Fetcher) insert(peer string, block *types.Block) {
defer func() { f.done <- hash }()
// If the parent's unknown, abort insertion
if !f.hasBlock(block.ParentHash()) {
parent := f.getBlock(block.ParentHash())
if parent == nil {
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)
// Quickly validate the header and propagate the block if it passes
if err := f.validateBlock(block, parent); err != nil {
glog.V(logger.Debug).Infof("Peer %s: block #%d [%x] verification failed: %v", peer, block.NumberU64(), hash[:4], err)
f.dropPeer(peer)
return
}
go f.broadcastBlock(block, true)
// Run the actual import and log any issues
if _, err := f.insertChain(types.Blocks{block}); err != nil {
glog.V(logger.Warn).Infof("Peer %s: block #%d [%x] import failed: %v", peer, block.NumberU64(), hash[:4], err)
return
}
// If import succeeded, broadcast the block
go f.broadcastBlock(block)
go f.broadcastBlock(block, false)
}()
}

18
eth/fetcher/fetcher_test.go
View File

@ -80,23 +80,27 @@ func newTester() *fetcherTester {
hashes: []common.Hash{knownHash},
blocks: map[common.Hash]*types.Block{knownHash: genesis},
}
tester.fetcher = New(tester.hasBlock, tester.broadcastBlock, tester.chainHeight, tester.insertChain, tester.dropPeer)
tester.fetcher = New(tester.getBlock, tester.verifyBlock, tester.broadcastBlock, tester.chainHeight, tester.insertChain, tester.dropPeer)
tester.fetcher.Start()
return tester
}
// hasBlock checks if a block is pres ent in the testers canonical chain.
func (f *fetcherTester) hasBlock(hash common.Hash) bool {
// getBlock retrieves a block from the tester's block chain.
func (f *fetcherTester) getBlock(hash common.Hash) *types.Block {
f.lock.RLock()
defer f.lock.RUnlock()
_, ok := f.blocks[hash]
return ok
return f.blocks[hash]
}
// verifyBlock is a nop placeholder for the block header verification.
func (f *fetcherTester) verifyBlock(block *types.Block, parent *types.Block) error {
return nil
}
// broadcastBlock is a nop placeholder for the block broadcasting.
func (f *fetcherTester) broadcastBlock(block *types.Block) {
func (f *fetcherTester) broadcastBlock(block *types.Block, propagate bool) {
}
// chainHeight retrieves the current height (block number) of the chain.
@ -257,7 +261,7 @@ func TestPendingDeduplication(t *testing.T) {
return nil
}
// Announce the same block many times until it's fetched (wait for any pending ops)
for !tester.hasBlock(hashes[0]) {
for tester.getBlock(hashes[0]) == nil {
tester.fetcher.Notify("repeater", hashes[0], time.Now().Add(-arriveTimeout), wrapper)
time.Sleep(time.Millisecond)
}

61
eth/handler.go
View File

@ -6,6 +6,8 @@ import (
"sync"
"time"
"github.com/ethereum/go-ethereum/pow"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
@ -67,7 +69,7 @@ type ProtocolManager struct {
// NewProtocolManager returns a new ethereum sub protocol manager. The Ethereum sub protocol manages peers capable
// with the ethereum network.
func NewProtocolManager(protocolVersion, networkId int, mux *event.TypeMux, txpool txPool, chainman *core.ChainManager) *ProtocolManager {
func NewProtocolManager(protocolVersion, networkId int, mux *event.TypeMux, txpool txPool, pow pow.PoW, chainman *core.ChainManager) *ProtocolManager {
// Create the protocol manager and initialize peer handlers
manager := &ProtocolManager{
eventMux: mux,
@ -91,10 +93,13 @@ 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)
validator := func(block *types.Block, parent *types.Block) error {
return core.ValidateHeader(pow, block.Header(), parent.Header(), true)
}
heighter := func() uint64 {
return manager.chainman.CurrentBlock().NumberU64()
}
manager.fetcher = fetcher.New(manager.chainman.HasBlock, manager.BroadcastBlock, heighter, manager.chainman.InsertChain, manager.removePeer)
manager.fetcher = fetcher.New(manager.chainman.GetBlock, validator, manager.BroadcastBlock, heighter, manager.chainman.InsertChain, manager.removePeer)
return manager
}
@ -261,6 +266,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
var (
hash common.Hash
bytes common.StorageSize
hashes []common.Hash
blocks []*types.Block
)
for {
@ -270,6 +276,8 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
} else if err != nil {
return errResp(ErrDecode, "msg %v: %v", msg, err)
}
hashes = append(hashes, hash)
// Retrieve the requested block, stopping if enough was found
if block := pm.chainman.GetBlock(hash); block != nil {
blocks = append(blocks, block)
@ -279,6 +287,15 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
}
}
}
if glog.V(logger.Detail) && len(blocks) == 0 && len(hashes) > 0 {
list := "["
for _, hash := range hashes {
list += fmt.Sprintf("%x, ", hash[:4])
}
list = list[:len(list)-2] + "]"
glog.Infof("Peer %s: no blocks found for requested hashes %s", p.id, list)
}
return p.sendBlocks(blocks)
case BlocksMsg:
@ -290,6 +307,10 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
glog.V(logger.Detail).Infoln("Decode error", err)
blocks = nil
}
// Update the receive timestamp of each block
for i:=0; i<len(blocks); i++ {
blocks[i].ReceivedAt = msg.ReceivedAt
}
// Filter out any explicitly requested blocks, deliver the rest to the downloader
if blocks := pm.fetcher.Filter(blocks); len(blocks) > 0 {
pm.downloader.DeliverBlocks(p.id, blocks)
@ -355,28 +376,27 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
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(block *types.Block) {
// BroadcastBlock will either propagate a block to a subset of it's peers, or
// will only announce it's availability (depending what's requested).
func (pm *ProtocolManager) BroadcastBlock(block *types.Block, propagate bool) {
hash := block.Hash()
// Retrieve all the target peers and split between full broadcast or only notification
peers := pm.peers.PeersWithoutBlock(hash)
split := int(math.Sqrt(float64(len(peers))))
transfer := peers[:split]
notify := peers[split:]
// Send out the data transfers and the notifications
for _, peer := range notify {
peer.sendNewBlockHashes([]common.Hash{hash})
// If propagation is requested, send to a subset of the peer
if propagate {
transfer := peers[:int(math.Sqrt(float64(len(peers))))]
for _, peer := range transfer {
peer.sendNewBlock(block)
}
glog.V(logger.Detail).Infof("propagated block %x to %d peers in %v", hash[:4], len(transfer), time.Since(block.ReceivedAt))
}
glog.V(logger.Detail).Infof("broadcast hash %x to %d peers.", hash[:4], len(notify))
for _, peer := range transfer {
peer.sendNewBlock(block)
// Otherwise if the block is indeed in out own chain, announce it
if pm.chainman.HasBlock(hash) {
for _, peer := range peers {
peer.sendNewBlockHashes([]common.Hash{hash})
}
glog.V(logger.Detail).Infof("announced block %x to %d peers in %v", hash[:4], len(peers), time.Since(block.ReceivedAt))
}
glog.V(logger.Detail).Infof("broadcast block %x to %d peers. Total processing time: %v", hash[:4], len(transfer), time.Since(block.ReceivedAt))
}
// BroadcastTx will propagate the block to its connected peers. It will sort
@ -398,7 +418,8 @@ func (self *ProtocolManager) minedBroadcastLoop() {
for obj := range self.minedBlockSub.Chan() {
switch ev := obj.(type) {
case core.NewMinedBlockEvent:
self.BroadcastBlock(ev.Block)
self.BroadcastBlock(ev.Block, false)
self.BroadcastBlock(ev.Block, true)
}
}
}