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eth/downloader: add fast and light sync strategies

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This commit is contained in:
Péter Szilágyi
2015-09-28 19:27:31 +03:00
parent c33cc382b3
commit f186b39018
11 changed files with 1456 additions and 828 deletions
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665
eth/downloader/downloader.go
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709
eth/downloader/downloader_test.go
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5
eth/downloader/metrics.go
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@ -42,4 +42,9 @@ var (
bodyReqTimer = metrics.NewTimer("eth/downloader/bodies/req")
bodyDropMeter = metrics.NewMeter("eth/downloader/bodies/drop")
bodyTimeoutMeter = metrics.NewMeter("eth/downloader/bodies/timeout")
receiptInMeter = metrics.NewMeter("eth/downloader/receipts/in")
receiptReqTimer = metrics.NewTimer("eth/downloader/receipts/req")
receiptDropMeter = metrics.NewMeter("eth/downloader/receipts/drop")
receiptTimeoutMeter = metrics.NewMeter("eth/downloader/receipts/timeout")
)

26
eth/downloader/modes.go Normal file
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@ -0,0 +1,26 @@
// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package downloader
// SyncMode represents the synchronisation mode of the downloader.
type SyncMode int
const (
FullSync SyncMode = iota // Synchronise the entire block-chain history from full blocks
FastSync // Quikcly download the headers, full sync only at the chain head
LightSync // Download only the headers and terminate afterwards
)

200
eth/downloader/peer.go
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@ -36,10 +36,11 @@ type relativeHashFetcherFn func(common.Hash) error
type absoluteHashFetcherFn func(uint64, int) error
type blockFetcherFn func([]common.Hash) error
// Block header and body fethers belonging to eth/62 and above
// Block header and body fetchers belonging to eth/62 and above
type relativeHeaderFetcherFn func(common.Hash, int, int, bool) error
type absoluteHeaderFetcherFn func(uint64, int, int, bool) error
type blockBodyFetcherFn func([]common.Hash) error
type receiptFetcherFn func([]common.Hash) error
var (
errAlreadyFetching = errors.New("already fetching blocks from peer")
@ -52,11 +53,14 @@ type peer struct {
id string // Unique identifier of the peer
head common.Hash // Hash of the peers latest known block
idle int32 // Current activity state of the peer (idle = 0, active = 1)
rep int32 // Simple peer reputation
blockIdle int32 // Current block activity state of the peer (idle = 0, active = 1)
receiptIdle int32 // Current receipt activity state of the peer (idle = 0, active = 1)
rep int32 // Simple peer reputation
capacity int32 // Number of blocks allowed to fetch per request
started time.Time // Time instance when the last fetch was started
blockCapacity int32 // Number of blocks (bodies) allowed to fetch per request
receiptCapacity int32 // Number of receipts allowed to fetch per request
blockStarted time.Time // Time instance when the last block (body)fetch was started
receiptStarted time.Time // Time instance when the last receipt fetch was started
ignored *set.Set // Set of hashes not to request (didn't have previously)
@ -68,6 +72,8 @@ type peer struct {
getAbsHeaders absoluteHeaderFetcherFn // [eth/62] Method to retrieve a batch of headers from an absolute position
getBlockBodies blockBodyFetcherFn // [eth/62] Method to retrieve a batch of block bodies
getReceipts receiptFetcherFn // [eth/63] Method to retrieve a batch of block transaction receipts
version int // Eth protocol version number to switch strategies
}
@ -75,12 +81,14 @@ type peer struct {
// mechanisms.
func newPeer(id string, version int, head common.Hash,
getRelHashes relativeHashFetcherFn, getAbsHashes absoluteHashFetcherFn, getBlocks blockFetcherFn, // eth/61 callbacks, remove when upgrading
getRelHeaders relativeHeaderFetcherFn, getAbsHeaders absoluteHeaderFetcherFn, getBlockBodies blockBodyFetcherFn) *peer {
getRelHeaders relativeHeaderFetcherFn, getAbsHeaders absoluteHeaderFetcherFn, getBlockBodies blockBodyFetcherFn,
getReceipts receiptFetcherFn) *peer {
return &peer{
id: id,
head: head,
capacity: 1,
ignored: set.New(),
id: id,
head: head,
blockCapacity: 1,
receiptCapacity: 1,
ignored: set.New(),
getRelHashes: getRelHashes,
getAbsHashes: getAbsHashes,
@ -90,24 +98,28 @@ func newPeer(id string, version int, head common.Hash,
getAbsHeaders: getAbsHeaders,
getBlockBodies: getBlockBodies,
getReceipts: getReceipts,
version: version,
}
}
// Reset clears the internal state of a peer entity.
func (p *peer) Reset() {
atomic.StoreInt32(&p.idle, 0)
atomic.StoreInt32(&p.capacity, 1)
atomic.StoreInt32(&p.blockIdle, 0)
atomic.StoreInt32(&p.receiptIdle, 0)
atomic.StoreInt32(&p.blockCapacity, 1)
atomic.StoreInt32(&p.receiptCapacity, 1)
p.ignored.Clear()
}
// Fetch61 sends a block retrieval request to the remote peer.
func (p *peer) Fetch61(request *fetchRequest) error {
// Short circuit if the peer is already fetching
if !atomic.CompareAndSwapInt32(&p.idle, 0, 1) {
if !atomic.CompareAndSwapInt32(&p.blockIdle, 0, 1) {
return errAlreadyFetching
}
p.started = time.Now()
p.blockStarted = time.Now()
// Convert the hash set to a retrievable slice
hashes := make([]common.Hash, 0, len(request.Hashes))
@ -119,13 +131,13 @@ func (p *peer) Fetch61(request *fetchRequest) error {
return nil
}
// Fetch sends a block body retrieval request to the remote peer.
func (p *peer) Fetch(request *fetchRequest) error {
// FetchBodies sends a block body retrieval request to the remote peer.
func (p *peer) FetchBodies(request *fetchRequest) error {
// Short circuit if the peer is already fetching
if !atomic.CompareAndSwapInt32(&p.idle, 0, 1) {
if !atomic.CompareAndSwapInt32(&p.blockIdle, 0, 1) {
return errAlreadyFetching
}
p.started = time.Now()
p.blockStarted = time.Now()
// Convert the header set to a retrievable slice
hashes := make([]common.Hash, 0, len(request.Headers))
@ -137,55 +149,64 @@ func (p *peer) Fetch(request *fetchRequest) error {
return nil
}
// SetIdle61 sets the peer to idle, allowing it to execute new retrieval requests.
// FetchReceipts sends a receipt retrieval request to the remote peer.
func (p *peer) FetchReceipts(request *fetchRequest) error {
// Short circuit if the peer is already fetching
if !atomic.CompareAndSwapInt32(&p.receiptIdle, 0, 1) {
return errAlreadyFetching
}
p.receiptStarted = time.Now()
// Convert the header set to a retrievable slice
hashes := make([]common.Hash, 0, len(request.Headers))
for _, header := range request.Headers {
hashes = append(hashes, header.Hash())
}
go p.getReceipts(hashes)
return nil
}
// SetBlocksIdle sets the peer to idle, allowing it to execute new retrieval requests.
// Its block retrieval allowance will also be updated either up- or downwards,
// depending on whether the previous fetch completed in time or not.
func (p *peer) SetIdle61() {
// Update the peer's download allowance based on previous performance
scale := 2.0
if time.Since(p.started) > blockSoftTTL {
scale = 0.5
if time.Since(p.started) > blockHardTTL {
scale = 1 / float64(MaxBlockFetch) // reduces capacity to 1
}
}
for {
// Calculate the new download bandwidth allowance
prev := atomic.LoadInt32(&p.capacity)
next := int32(math.Max(1, math.Min(float64(MaxBlockFetch), float64(prev)*scale)))
// Try to update the old value
if atomic.CompareAndSwapInt32(&p.capacity, prev, next) {
// If we're having problems at 1 capacity, try to find better peers
if next == 1 {
p.Demote()
}
break
}
}
// Set the peer to idle to allow further block requests
atomic.StoreInt32(&p.idle, 0)
func (p *peer) SetBlocksIdle() {
p.setIdle(p.blockStarted, blockSoftTTL, blockHardTTL, MaxBlockFetch, &p.blockCapacity, &p.blockIdle)
}
// SetIdle sets the peer to idle, allowing it to execute new retrieval requests.
// SetBodiesIdle sets the peer to idle, allowing it to execute new retrieval requests.
// Its block body retrieval allowance will also be updated either up- or downwards,
// depending on whether the previous fetch completed in time or not.
func (p *peer) SetIdle() {
func (p *peer) SetBodiesIdle() {
p.setIdle(p.blockStarted, bodySoftTTL, bodyHardTTL, MaxBlockFetch, &p.blockCapacity, &p.blockIdle)
}
// SetReceiptsIdle sets the peer to idle, allowing it to execute new retrieval requests.
// Its receipt retrieval allowance will also be updated either up- or downwards,
// depending on whether the previous fetch completed in time or not.
func (p *peer) SetReceiptsIdle() {
p.setIdle(p.receiptStarted, receiptSoftTTL, receiptHardTTL, MaxReceiptFetch, &p.receiptCapacity, &p.receiptIdle)
}
// setIdle sets the peer to idle, allowing it to execute new retrieval requests.
// Its data retrieval allowance will also be updated either up- or downwards,
// depending on whether the previous fetch completed in time or not.
func (p *peer) setIdle(started time.Time, softTTL, hardTTL time.Duration, maxFetch int, capacity, idle *int32) {
// Update the peer's download allowance based on previous performance
scale := 2.0
if time.Since(p.started) > bodySoftTTL {
if time.Since(started) > softTTL {
scale = 0.5
if time.Since(p.started) > bodyHardTTL {
scale = 1 / float64(MaxBodyFetch) // reduces capacity to 1
if time.Since(started) > hardTTL {
scale = 1 / float64(maxFetch) // reduces capacity to 1
}
}
for {
// Calculate the new download bandwidth allowance
prev := atomic.LoadInt32(&p.capacity)
next := int32(math.Max(1, math.Min(float64(MaxBodyFetch), float64(prev)*scale)))
prev := atomic.LoadInt32(capacity)
next := int32(math.Max(1, math.Min(float64(maxFetch), float64(prev)*scale)))
// Try to update the old value
if atomic.CompareAndSwapInt32(&p.capacity, prev, next) {
if atomic.CompareAndSwapInt32(capacity, prev, next) {
// If we're having problems at 1 capacity, try to find better peers
if next == 1 {
p.Demote()
@ -193,14 +214,20 @@ func (p *peer) SetIdle() {
break
}
}
// Set the peer to idle to allow further block requests
atomic.StoreInt32(&p.idle, 0)
// Set the peer to idle to allow further fetch requests
atomic.StoreInt32(idle, 0)
}
// Capacity retrieves the peers block download allowance based on its previously
// discovered bandwidth capacity.
func (p *peer) Capacity() int {
return int(atomic.LoadInt32(&p.capacity))
// BlockCapacity retrieves the peers block download allowance based on its
// previously discovered bandwidth capacity.
func (p *peer) BlockCapacity() int {
return int(atomic.LoadInt32(&p.blockCapacity))
}
// ReceiptCapacity retrieves the peers block download allowance based on its
// previously discovered bandwidth capacity.
func (p *peer) ReceiptCapacity() int {
return int(atomic.LoadInt32(&p.receiptCapacity))
}
// Promote increases the peer's reputation.
@ -226,7 +253,8 @@ func (p *peer) Demote() {
func (p *peer) String() string {
return fmt.Sprintf("Peer %s [%s]", p.id,
fmt.Sprintf("reputation %3d, ", atomic.LoadInt32(&p.rep))+
fmt.Sprintf("capacity %3d, ", atomic.LoadInt32(&p.capacity))+
fmt.Sprintf("block cap %3d, ", atomic.LoadInt32(&p.blockCapacity))+
fmt.Sprintf("receipt cap %3d, ", atomic.LoadInt32(&p.receiptCapacity))+
fmt.Sprintf("ignored %4d", p.ignored.Size()),
)
}
@ -310,26 +338,52 @@ func (ps *peerSet) AllPeers() []*peer {
return list
}
// IdlePeers retrieves a flat list of all the currently idle peers within the
// BlockIdlePeers retrieves a flat list of all the currently idle peers within the
// active peer set, ordered by their reputation.
func (ps *peerSet) IdlePeers(version int) []*peer {
func (ps *peerSet) BlockIdlePeers(version int) ([]*peer, int) {
ps.lock.RLock()
defer ps.lock.RUnlock()
list := make([]*peer, 0, len(ps.peers))
idle, total := make([]*peer, 0, len(ps.peers)), 0
for _, p := range ps.peers {
if (version == eth61 && p.version == eth61) || (version >= eth62 && p.version >= eth62) {
if atomic.LoadInt32(&p.idle) == 0 {
list = append(list, p)
if (version == 61 && p.version == 61) || (version >= 62 && p.version >= 62) {
if atomic.LoadInt32(&p.blockIdle) == 0 {
idle = append(idle, p)
}
total++
}
}
for i := 0; i < len(idle); i++ {
for j := i + 1; j < len(idle); j++ {
if atomic.LoadInt32(&idle[i].rep) < atomic.LoadInt32(&idle[j].rep) {
idle[i], idle[j] = idle[j], idle[i]
}
}
}
for i := 0; i < len(list); i++ {
for j := i + 1; j < len(list); j++ {
if atomic.LoadInt32(&list[i].rep) < atomic.LoadInt32(&list[j].rep) {
list[i], list[j] = list[j], list[i]
}
}
}
return list
return idle, total
}
// ReceiptIdlePeers retrieves a flat list of all the currently idle peers within the
// active peer set, ordered by their reputation.
func (ps *peerSet) ReceiptIdlePeers() ([]*peer, int) {
ps.lock.RLock()
defer ps.lock.RUnlock()
idle, total := make([]*peer, 0, len(ps.peers)), 0
for _, p := range ps.peers {
if p.version >= 63 {
if atomic.LoadInt32(&p.receiptIdle) == 0 {
idle = append(idle, p)
}
total++
}
}
for i := 0; i < len(idle); i++ {
for j := i + 1; j < len(idle); j++ {
if atomic.LoadInt32(&idle[i].rep) < atomic.LoadInt32(&idle[j].rep) {
idle[i], idle[j] = idle[j], idle[i]
}
}
}
return idle, total
}

596
eth/downloader/queue.go
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@ -29,11 +29,12 @@ import (
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/rcrowley/go-metrics"
"gopkg.in/karalabe/cookiejar.v2/collections/prque"
)
var (
blockCacheLimit = 8 * MaxBlockFetch // Maximum number of blocks to cache before throttling the download
blockCacheLimit = 1024 // Maximum number of blocks to cache before throttling the download
)
var (
@ -41,29 +42,47 @@ var (
errStaleDelivery = errors.New("stale delivery")
)
// fetchRequest is a currently running block retrieval operation.
// fetchRequest is a currently running data retrieval operation.
type fetchRequest struct {
Peer *peer // Peer to which the request was sent
Hashes map[common.Hash]int // [eth/61] Requested hashes with their insertion index (priority)
Hashes map[common.Hash]int // [eth/61] Requested block with their insertion index (priority)
Headers []*types.Header // [eth/62] Requested headers, sorted by request order
Time time.Time // Time when the request was made
}
// fetchResult is the assembly collecting partial results from potentially more
// than one fetcher routines, until all outstanding retrievals complete and the
// result as a whole can be processed.
type fetchResult struct {
Pending int // Number of data fetches still pending
Header *types.Header
Uncles []*types.Header
Transactions types.Transactions
Receipts types.Receipts
}
// queue represents hashes that are either need fetching or are being fetched
type queue struct {
hashPool map[common.Hash]int // [eth/61] Pending hashes, mapping to their insertion index (priority)
hashQueue *prque.Prque // [eth/61] Priority queue of the block hashes to fetch
hashCounter int // [eth/61] Counter indexing the added hashes to ensure retrieval order
headerPool map[common.Hash]*types.Header // [eth/62] Pending headers, mapping from their hashes
headerQueue *prque.Prque // [eth/62] Priority queue of the headers to fetch the bodies for
headerHead common.Hash // [eth/62] Hash of the last queued header to verify order
headerHead common.Hash // [eth/62] Hash of the last queued header to verify order
pendPool map[string]*fetchRequest // Currently pending block retrieval operations
blockTaskPool map[common.Hash]*types.Header // [eth/62] Pending block (body) retrieval tasks, mapping hashes to headers
blockTaskQueue *prque.Prque // [eth/62] Priority queue of the headers to fetch the blocks (bodies) for
blockPendPool map[string]*fetchRequest // [eth/62] Currently pending block (body) retrieval operations
blockDonePool map[common.Hash]struct{} // [eth/62] Set of the completed block (body) fetches
blockPool map[common.Hash]uint64 // Hash-set of the downloaded data blocks, mapping to cache indexes
blockCache []*Block // Downloaded but not yet delivered blocks
blockOffset uint64 // Offset of the first cached block in the block-chain
receiptTaskPool map[common.Hash]*types.Header // [eth/63] Pending receipt retrieval tasks, mapping hashes to headers
receiptTaskQueue *prque.Prque // [eth/63] Priority queue of the headers to fetch the receipts for
receiptPendPool map[string]*fetchRequest // [eth/63] Currently pending receipt retrieval operations
receiptDonePool map[common.Hash]struct{} // [eth/63] Set of the completed receipt fetches
resultCache []*fetchResult // Downloaded but not yet delivered fetch results
resultOffset uint64 // Offset of the first cached fetch result in the block-chain
resultParts int // Number of fetch components required to complete an item
lock sync.RWMutex
}
@ -71,13 +90,17 @@ type queue struct {
// newQueue creates a new download queue for scheduling block retrieval.
func newQueue() *queue {
return &queue{
hashPool: make(map[common.Hash]int),
hashQueue: prque.New(),
headerPool: make(map[common.Hash]*types.Header),
headerQueue: prque.New(),
pendPool: make(map[string]*fetchRequest),
blockPool: make(map[common.Hash]uint64),
blockCache: make([]*Block, blockCacheLimit),
hashPool: make(map[common.Hash]int),
hashQueue: prque.New(),
blockTaskPool: make(map[common.Hash]*types.Header),
blockTaskQueue: prque.New(),
blockPendPool: make(map[string]*fetchRequest),
blockDonePool: make(map[common.Hash]struct{}),
receiptTaskPool: make(map[common.Hash]*types.Header),
receiptTaskQueue: prque.New(),
receiptPendPool: make(map[string]*fetchRequest),
receiptDonePool: make(map[common.Hash]struct{}),
resultCache: make([]*fetchResult, blockCacheLimit),
}
}
@ -90,32 +113,37 @@ func (q *queue) Reset() {
q.hashQueue.Reset()
q.hashCounter = 0
q.headerPool = make(map[common.Hash]*types.Header)
q.headerQueue.Reset()
q.headerHead = common.Hash{}
q.pendPool = make(map[string]*fetchRequest)
q.blockTaskPool = make(map[common.Hash]*types.Header)
q.blockTaskQueue.Reset()
q.blockPendPool = make(map[string]*fetchRequest)
q.blockDonePool = make(map[common.Hash]struct{})
q.blockPool = make(map[common.Hash]uint64)
q.blockOffset = 0
q.blockCache = make([]*Block, blockCacheLimit)
q.receiptTaskPool = make(map[common.Hash]*types.Header)
q.receiptTaskQueue.Reset()
q.receiptPendPool = make(map[string]*fetchRequest)
q.receiptDonePool = make(map[common.Hash]struct{})
q.resultCache = make([]*fetchResult, blockCacheLimit)
q.resultOffset = 0
q.resultParts = 0
}
// Size retrieves the number of blocks in the queue, returning separately for
// pending and already downloaded.
func (q *queue) Size() (int, int) {
// PendingBlocks retrieves the number of block (body) requests pending for retrieval.
func (q *queue) PendingBlocks() int {
q.lock.RLock()
defer q.lock.RUnlock()
return len(q.hashPool) + len(q.headerPool), len(q.blockPool)
return q.hashQueue.Size() + q.blockTaskQueue.Size()
}
// Pending retrieves the number of blocks pending for retrieval.
func (q *queue) Pending() int {
// PendingReceipts retrieves the number of block receipts pending for retrieval.
func (q *queue) PendingReceipts() int {
q.lock.RLock()
defer q.lock.RUnlock()
return q.hashQueue.Size() + q.headerQueue.Size()
return q.receiptTaskQueue.Size()
}
// InFlight retrieves the number of fetch requests currently in flight.
@ -123,44 +151,55 @@ func (q *queue) InFlight() int {
q.lock.RLock()
defer q.lock.RUnlock()
return len(q.pendPool)
return len(q.blockPendPool) + len(q.receiptPendPool)
}
// Throttle checks if the download should be throttled (active block fetches
// exceed block cache).
func (q *queue) Throttle() bool {
// Idle returns if the queue is fully idle or has some data still inside. This
// method is used by the tester to detect termination events.
func (q *queue) Idle() bool {
q.lock.RLock()
defer q.lock.RUnlock()
// Calculate the currently in-flight block requests
queued := q.hashQueue.Size() + q.blockTaskQueue.Size() + q.receiptTaskQueue.Size()
pending := len(q.blockPendPool) + len(q.receiptPendPool)
cached := len(q.blockDonePool) + len(q.receiptDonePool)
return (queued + pending + cached) == 0
}
// ThrottleBlocks checks if the download should be throttled (active block (body)
// fetches exceed block cache).
func (q *queue) ThrottleBlocks() bool {
q.lock.RLock()
defer q.lock.RUnlock()
// Calculate the currently in-flight block (body) requests
pending := 0
for _, request := range q.pendPool {
for _, request := range q.blockPendPool {
pending += len(request.Hashes) + len(request.Headers)
}
// Throttle if more blocks are in-flight than free space in the cache
return pending >= len(q.blockCache)-len(q.blockPool)
// Throttle if more blocks (bodies) are in-flight than free space in the cache
return pending >= len(q.resultCache)-len(q.blockDonePool)
}
// Has checks if a hash is within the download queue or not.
func (q *queue) Has(hash common.Hash) bool {
// ThrottleReceipts checks if the download should be throttled (active receipt
// fetches exceed block cache).
func (q *queue) ThrottleReceipts() bool {
q.lock.RLock()
defer q.lock.RUnlock()
if _, ok := q.hashPool[hash]; ok {
return true
// Calculate the currently in-flight receipt requests
pending := 0
for _, request := range q.receiptPendPool {
pending += len(request.Headers)
}
if _, ok := q.headerPool[hash]; ok {
return true
}
if _, ok := q.blockPool[hash]; ok {
return true
}
return false
// Throttle if more receipts are in-flight than free space in the cache
return pending >= len(q.resultCache)-len(q.receiptDonePool)
}
// Insert61 adds a set of hashes for the download queue for scheduling, returning
// Schedule61 adds a set of hashes for the download queue for scheduling, returning
// the new hashes encountered.
func (q *queue) Insert61(hashes []common.Hash, fifo bool) []common.Hash {
func (q *queue) Schedule61(hashes []common.Hash, fifo bool) []common.Hash {
q.lock.Lock()
defer q.lock.Unlock()
@ -186,22 +225,17 @@ func (q *queue) Insert61(hashes []common.Hash, fifo bool) []common.Hash {
return inserts
}
// Insert adds a set of headers for the download queue for scheduling, returning
// Schedule adds a set of headers for the download queue for scheduling, returning
// the new headers encountered.
func (q *queue) Insert(headers []*types.Header, from uint64) []*types.Header {
func (q *queue) Schedule(headers []*types.Header, from uint64, receipts bool) []*types.Header {
q.lock.Lock()
defer q.lock.Unlock()
// Insert all the headers prioritized by the contained block number
inserts := make([]*types.Header, 0, len(headers))
for _, header := range headers {
// Make sure no duplicate requests are executed
hash := header.Hash()
if _, ok := q.headerPool[hash]; ok {
glog.V(logger.Warn).Infof("Header #%d [%x] already scheduled", header.Number.Uint64(), hash[:4])
continue
}
// Make sure chain order is honored and preserved throughout
hash := header.Hash()
if header.Number == nil || header.Number.Uint64() != from {
glog.V(logger.Warn).Infof("Header #%v [%x] broke chain ordering, expected %d", header.Number, hash[:4], from)
break
@ -210,69 +244,72 @@ func (q *queue) Insert(headers []*types.Header, from uint64) []*types.Header {
glog.V(logger.Warn).Infof("Header #%v [%x] broke chain ancestry", header.Number, hash[:4])
break
}
// Queue the header for body retrieval
// Make sure no duplicate requests are executed
if _, ok := q.blockTaskPool[hash]; ok {
glog.V(logger.Warn).Infof("Header #%d [%x] already scheduled for block fetch", header.Number.Uint64(), hash[:4])
continue
}
if _, ok := q.receiptTaskPool[hash]; ok {
glog.V(logger.Warn).Infof("Header #%d [%x] already scheduled for receipt fetch", header.Number.Uint64(), hash[:4])
continue
}
// Queue the header for content retrieval
q.blockTaskPool[hash] = header
q.blockTaskQueue.Push(header, -float32(header.Number.Uint64()))
if receipts {
q.receiptTaskPool[hash] = header
q.receiptTaskQueue.Push(header, -float32(header.Number.Uint64()))
}
inserts = append(inserts, header)
q.headerPool[hash] = header
q.headerQueue.Push(header, -float32(header.Number.Uint64()))
q.headerHead = hash
from++
}
return inserts
}
// GetHeadBlock retrieves the first block from the cache, or nil if it hasn't
// GetHeadResult retrieves the first fetch result from the cache, or nil if it hasn't
// been downloaded yet (or simply non existent).
func (q *queue) GetHeadBlock() *Block {
func (q *queue) GetHeadResult() *fetchResult {
q.lock.RLock()
defer q.lock.RUnlock()
if len(q.blockCache) == 0 {
if len(q.resultCache) == 0 || q.resultCache[0] == nil {
return nil
}
return q.blockCache[0]
}
// GetBlock retrieves a downloaded block, or nil if non-existent.
func (q *queue) GetBlock(hash common.Hash) *Block {
q.lock.RLock()
defer q.lock.RUnlock()
// Short circuit if the block hasn't been downloaded yet
index, ok := q.blockPool[hash]
if !ok {
if q.resultCache[0].Pending > 0 {
return nil
}
// Return the block if it's still available in the cache
if q.blockOffset <= index && index < q.blockOffset+uint64(len(q.blockCache)) {
return q.blockCache[index-q.blockOffset]
}
return nil
return q.resultCache[0]
}
// TakeBlocks retrieves and permanently removes a batch of blocks from the cache.
func (q *queue) TakeBlocks() []*Block {
// TakeResults retrieves and permanently removes a batch of fetch results from
// the cache.
func (q *queue) TakeResults() []*fetchResult {
q.lock.Lock()
defer q.lock.Unlock()
// Accumulate all available blocks
blocks := []*Block{}
for _, block := range q.blockCache {
if block == nil {
// Accumulate all available results
results := []*fetchResult{}
for _, result := range q.resultCache {
if result == nil || result.Pending > 0 {
break
}
blocks = append(blocks, block)
delete(q.blockPool, block.RawBlock.Hash())
}
// Delete the blocks from the slice and let them be garbage collected
// without this slice trick the blocks would stay in memory until nil
// would be assigned to q.blocks
copy(q.blockCache, q.blockCache[len(blocks):])
for k, n := len(q.blockCache)-len(blocks), len(q.blockCache); k < n; k++ {
q.blockCache[k] = nil
}
q.blockOffset += uint64(len(blocks))
results = append(results, result)
return blocks
hash := result.Header.Hash()
delete(q.blockDonePool, hash)
delete(q.receiptDonePool, hash)
}
// Delete the results from the slice and let them be garbage collected
// without this slice trick the results would stay in memory until nil
// would be assigned to them.
copy(q.resultCache, q.resultCache[len(results):])
for k, n := len(q.resultCache)-len(results), len(q.resultCache); k < n; k++ {
q.resultCache[k] = nil
}
q.resultOffset += uint64(len(results))
return results
}
// Reserve61 reserves a set of hashes for the given peer, skipping any previously
@ -286,12 +323,12 @@ func (q *queue) Reserve61(p *peer, count int) *fetchRequest {
if q.hashQueue.Empty() {
return nil
}
if _, ok := q.pendPool[p.id]; ok {
if _, ok := q.blockPendPool[p.id]; ok {
return nil
}
// Calculate an upper limit on the hashes we might fetch (i.e. throttling)
space := len(q.blockCache) - len(q.blockPool)
for _, request := range q.pendPool {
space := len(q.resultCache) - len(q.blockDonePool)
for _, request := range q.blockPendPool {
space -= len(request.Hashes)
}
// Retrieve a batch of hashes, skipping previously failed ones
@ -319,49 +356,82 @@ func (q *queue) Reserve61(p *peer, count int) *fetchRequest {
Hashes: send,
Time: time.Now(),
}
q.pendPool[p.id] = request
q.blockPendPool[p.id] = request
return request
}
// Reserve reserves a set of headers for the given peer, skipping any previously
// failed download. Beside the next batch of needed fetches, it also returns a
// flag whether empty blocks were queued requiring processing.
func (q *queue) Reserve(p *peer, count int) (*fetchRequest, bool, error) {
// ReserveBlocks reserves a set of body fetches for the given peer, skipping any
// previously failed downloads. Beside the next batch of needed fetches, it also
// returns a flag whether empty blocks were queued requiring processing.
func (q *queue) ReserveBlocks(p *peer, count int) (*fetchRequest, bool, error) {
noop := func(header *types.Header) bool {
return header.TxHash == types.EmptyRootHash && header.UncleHash == types.EmptyUncleHash
}
return q.reserveFetch(p, count, q.blockTaskPool, q.blockTaskQueue, q.blockPendPool, q.blockDonePool, noop)
}
// ReserveReceipts reserves a set of receipt fetches for the given peer, skipping
// any previously failed downloads. Beside the next batch of needed fetches, it
// also returns a flag whether empty receipts were queued requiring importing.
func (q *queue) ReserveReceipts(p *peer, count int) (*fetchRequest, bool, error) {
noop := func(header *types.Header) bool {
return header.ReceiptHash == types.EmptyRootHash
}
return q.reserveFetch(p, count, q.receiptTaskPool, q.receiptTaskQueue, q.receiptPendPool, q.receiptDonePool, noop)
}
// reserveFetch reserves a set of data download operations for a given peer,
// skipping any previously failed ones. This method is a generic version used
// by the individual special reservation functions.
func (q *queue) reserveFetch(p *peer, count int, taskPool map[common.Hash]*types.Header, taskQueue *prque.Prque,
pendPool map[string]*fetchRequest, donePool map[common.Hash]struct{}, noop func(*types.Header) bool) (*fetchRequest, bool, error) {
q.lock.Lock()
defer q.lock.Unlock()
// Short circuit if the pool has been depleted, or if the peer's already
// downloading something (sanity check not to corrupt state)
if q.headerQueue.Empty() {
if taskQueue.Empty() {
return nil, false, nil
}
if _, ok := q.pendPool[p.id]; ok {
if _, ok := pendPool[p.id]; ok {
return nil, false, nil
}
// Calculate an upper limit on the bodies we might fetch (i.e. throttling)
space := len(q.blockCache) - len(q.blockPool)
for _, request := range q.pendPool {
// Calculate an upper limit on the items we might fetch (i.e. throttling)
space := len(q.resultCache) - len(donePool)
for _, request := range pendPool {
space -= len(request.Headers)
}
// Retrieve a batch of headers, skipping previously failed ones
// Retrieve a batch of tasks, skipping previously failed ones
send := make([]*types.Header, 0, count)
skip := make([]*types.Header, 0)
process := false
for proc := 0; proc < space && len(send) < count && !q.headerQueue.Empty(); proc++ {
header := q.headerQueue.PopItem().(*types.Header)
progress := false
for proc := 0; proc < space && len(send) < count && !taskQueue.Empty(); proc++ {
header := taskQueue.PopItem().(*types.Header)
// If the header defines an empty block, deliver straight
if header.TxHash == types.DeriveSha(types.Transactions{}) && header.UncleHash == types.CalcUncleHash([]*types.Header{}) {
if err := q.enqueue("", types.NewBlockWithHeader(header)); err != nil {
return nil, false, errInvalidChain
// If we're the first to request this task, initialize the result container
index := int(header.Number.Int64() - int64(q.resultOffset))
if index >= len(q.resultCache) || index < 0 {
return nil, false, errInvalidChain
}
if q.resultCache[index] == nil {
q.resultCache[index] = &fetchResult{
Pending: q.resultParts,
Header: header,
}
delete(q.headerPool, header.Hash())
process, space, proc = true, space-1, proc-1
}
// If this fetch task is a noop, skip this fetch operation
if noop(header) {
donePool[header.Hash()] = struct{}{}
delete(taskPool, header.Hash())
space, proc = space-1, proc-1
q.resultCache[index].Pending--
progress = true
continue
}
// If it's a content block, add to the body fetch request
// Otherwise if not a known unknown block, add to the retrieve list
if p.ignored.Has(header.Hash()) {
skip = append(skip, header)
} else {
@ -370,24 +440,41 @@ func (q *queue) Reserve(p *peer, count int) (*fetchRequest, bool, error) {
}
// Merge all the skipped headers back
for _, header := range skip {
q.headerQueue.Push(header, -float32(header.Number.Uint64()))
taskQueue.Push(header, -float32(header.Number.Uint64()))
}
// Assemble and return the block download request
if len(send) == 0 {
return nil, process, nil
return nil, progress, nil
}
request := &fetchRequest{
Peer: p,
Headers: send,
Time: time.Now(),
}
q.pendPool[p.id] = request
pendPool[p.id] = request
return request, process, nil
return request, progress, nil
}
// Cancel aborts a fetch request, returning all pending hashes to the queue.
func (q *queue) Cancel(request *fetchRequest) {
// Cancel61 aborts a fetch request, returning all pending hashes to the queue.
func (q *queue) Cancel61(request *fetchRequest) {
q.cancel(request, nil, q.blockPendPool)
}
// CancelBlocks aborts a body fetch request, returning all pending hashes to the
// task queue.
func (q *queue) CancelBlocks(request *fetchRequest) {
q.cancel(request, q.blockTaskQueue, q.blockPendPool)
}
// CancelReceipts aborts a body fetch request, returning all pending hashes to
// the task queue.
func (q *queue) CancelReceipts(request *fetchRequest) {
q.cancel(request, q.receiptTaskQueue, q.receiptPendPool)
}
// Cancel aborts a fetch request, returning all pending hashes to the task queue.
func (q *queue) cancel(request *fetchRequest, taskQueue *prque.Prque, pendPool map[string]*fetchRequest) {
q.lock.Lock()
defer q.lock.Unlock()
@ -395,20 +482,62 @@ func (q *queue) Cancel(request *fetchRequest) {
q.hashQueue.Push(hash, float32(index))
}
for _, header := range request.Headers {
q.headerQueue.Push(header, -float32(header.Number.Uint64()))
taskQueue.Push(header, -float32(header.Number.Uint64()))
}
delete(q.pendPool, request.Peer.id)
delete(pendPool, request.Peer.id)
}
// Expire checks for in flight requests that exceeded a timeout allowance,
// Revoke cancels all pending requests belonging to a given peer. This method is
// meant to be called during a peer drop to quickly reassign owned data fetches
// to remaining nodes.
func (q *queue) Revoke(peerId string) {
q.lock.Lock()
defer q.lock.Unlock()
if request, ok := q.blockPendPool[peerId]; ok {
for hash, index := range request.Hashes {
q.hashQueue.Push(hash, float32(index))
}
for _, header := range request.Headers {
q.blockTaskQueue.Push(header, -float32(header.Number.Uint64()))
}
delete(q.blockPendPool, peerId)
}
if request, ok := q.receiptPendPool[peerId]; ok {
for _, header := range request.Headers {
q.receiptTaskQueue.Push(header, -float32(header.Number.Uint64()))
}
delete(q.receiptPendPool, peerId)
}
}
// Expire61 checks for in flight requests that exceeded a timeout allowance,
// canceling them and returning the responsible peers for penalization.
func (q *queue) Expire(timeout time.Duration) []string {
func (q *queue) Expire61(timeout time.Duration) []string {
return q.expire(timeout, q.blockPendPool, nil)
}
// ExpireBlocks checks for in flight block body requests that exceeded a timeout
// allowance, canceling them and returning the responsible peers for penalization.
func (q *queue) ExpireBlocks(timeout time.Duration) []string {
return q.expire(timeout, q.blockPendPool, q.blockTaskQueue)
}
// ExpireReceipts checks for in flight receipt requests that exceeded a timeout
// allowance, canceling them and returning the responsible peers for penalization.
func (q *queue) ExpireReceipts(timeout time.Duration) []string {
return q.expire(timeout, q.receiptPendPool, q.receiptTaskQueue)
}
// expire is the generic check that move expired tasks from a pending pool back
// into a task pool, returning all entities caught with expired tasks.
func (q *queue) expire(timeout time.Duration, pendPool map[string]*fetchRequest, taskQueue *prque.Prque) []string {
q.lock.Lock()
defer q.lock.Unlock()
// Iterate over the expired requests and return each to the queue
peers := []string{}
for id, request := range q.pendPool {
for id, request := range pendPool {
if time.Since(request.Time) > timeout {
// Update the metrics with the timeout
if len(request.Hashes) > 0 {
@ -421,14 +550,14 @@ func (q *queue) Expire(timeout time.Duration) []string {
q.hashQueue.Push(hash, float32(index))
}
for _, header := range request.Headers {
q.headerQueue.Push(header, -float32(header.Number.Uint64()))
taskQueue.Push(header, -float32(header.Number.Uint64()))
}
peers = append(peers, id)
}
}
// Remove the expired requests from the pending pool
for _, id := range peers {
delete(q.pendPool, id)
delete(pendPool, id)
}
return peers
}
@ -439,12 +568,12 @@ func (q *queue) Deliver61(id string, blocks []*types.Block) (err error) {
defer q.lock.Unlock()
// Short circuit if the blocks were never requested
request := q.pendPool[id]
request := q.blockPendPool[id]
if request == nil {
return errNoFetchesPending
}
blockReqTimer.UpdateSince(request.Time)
delete(q.pendPool, id)
delete(q.blockPendPool, id)
// If no blocks were retrieved, mark them as unavailable for the origin peer
if len(blocks) == 0 {
@ -461,10 +590,19 @@ func (q *queue) Deliver61(id string, blocks []*types.Block) (err error) {
errs = append(errs, fmt.Errorf("non-requested block %x", hash))
continue
}
// Queue the block up for processing
if err := q.enqueue(id, block); err != nil {
return err
// Reconstruct the next result if contents match up
index := int(block.Number().Int64() - int64(q.resultOffset))
if index >= len(q.resultCache) || index < 0 {
errs = []error{errInvalidChain}
break
}
q.resultCache[index] = &fetchResult{
Header: block.Header(),
Transactions: block.Transactions(),
Uncles: block.Uncles(),
}
q.blockDonePool[block.Hash()] = struct{}{}
delete(request.Hashes, hash)
delete(q.hashPool, hash)
}
@ -473,72 +611,12 @@ func (q *queue) Deliver61(id string, blocks []*types.Block) (err error) {
q.hashQueue.Push(hash, float32(index))
}
// If none of the blocks were good, it's a stale delivery
if len(errs) != 0 {
if len(errs) == len(blocks) {
return errStaleDelivery
}
return fmt.Errorf("multiple failures: %v", errs)
}
return nil
}
// Deliver injects a block body retrieval response into the download queue.
func (q *queue) Deliver(id string, txLists [][]*types.Transaction, uncleLists [][]*types.Header) error {
q.lock.Lock()
defer q.lock.Unlock()
// Short circuit if the block bodies were never requested
request := q.pendPool[id]
if request == nil {
return errNoFetchesPending
}
bodyReqTimer.UpdateSince(request.Time)
delete(q.pendPool, id)
// If no block bodies were retrieved, mark them as unavailable for the origin peer
if len(txLists) == 0 || len(uncleLists) == 0 {
for hash, _ := range request.Headers {
request.Peer.ignored.Add(hash)
}
}
// Assemble each of the block bodies with their headers and queue for processing
errs := make([]error, 0)
for i, header := range request.Headers {
// Short circuit block assembly if no more bodies are found
if i >= len(txLists) || i >= len(uncleLists) {
break
}
// Reconstruct the next block if contents match up
if types.DeriveSha(types.Transactions(txLists[i])) != header.TxHash || types.CalcUncleHash(uncleLists[i]) != header.UncleHash {
errs = []error{errInvalidBody}
break
}
block := types.NewBlockWithHeader(header).WithBody(txLists[i], uncleLists[i])
// Queue the block up for processing
if err := q.enqueue(id, block); err != nil {
errs = []error{err}
break
}
request.Headers[i] = nil
delete(q.headerPool, header.Hash())
}
// Return all failed or missing fetches to the queue
for _, header := range request.Headers {
if header != nil {
q.headerQueue.Push(header, -float32(header.Number.Uint64()))
}
}
// If none of the blocks were good, it's a stale delivery
switch {
case len(errs) == 0:
return nil
case len(errs) == 1 && errs[0] == errInvalidBody:
return errInvalidBody
case len(errs) == 1 && errs[0] == errInvalidChain:
return errInvalidChain
case len(errs) == 1 && (errs[0] == errInvalidChain || errs[0] == errInvalidBlock):
return errs[0]
case len(errs) == len(request.Headers):
return errStaleDelivery
@ -548,29 +626,105 @@ func (q *queue) Deliver(id string, txLists [][]*types.Transaction, uncleLists []
}
}
// enqueue inserts a new block into the final delivery queue, waiting for pickup
// by the processor.
func (q *queue) enqueue(origin string, block *types.Block) error {
// If a requested block falls out of the range, the hash chain is invalid
index := int(int64(block.NumberU64()) - int64(q.blockOffset))
if index >= len(q.blockCache) || index < 0 {
return errInvalidChain
// DeliverBlocks injects a block (body) retrieval response into the results queue.
func (q *queue) DeliverBlocks(id string, txLists [][]*types.Transaction, uncleLists [][]*types.Header) error {
reconstruct := func(header *types.Header, index int, result *fetchResult) error {
if types.DeriveSha(types.Transactions(txLists[index])) != header.TxHash || types.CalcUncleHash(uncleLists[index]) != header.UncleHash {
return errInvalidBody
}
result.Transactions = txLists[index]
result.Uncles = uncleLists[index]
return nil
}
// Otherwise merge the block and mark the hash done
q.blockCache[index] = &Block{
RawBlock: block,
OriginPeer: origin,
}
q.blockPool[block.Header().Hash()] = block.NumberU64()
return nil
return q.deliver(id, q.blockTaskPool, q.blockTaskQueue, q.blockPendPool, q.blockDonePool, bodyReqTimer, len(txLists), reconstruct)
}
// Prepare configures the block cache offset to allow accepting inbound blocks.
func (q *queue) Prepare(offset uint64) {
// DeliverReceipts injects a receipt retrieval response into the results queue.
func (q *queue) DeliverReceipts(id string, receiptList [][]*types.Receipt) error {
reconstruct := func(header *types.Header, index int, result *fetchResult) error {
if types.DeriveSha(types.Receipts(receiptList[index])) != header.ReceiptHash {
return errInvalidReceipt
}
result.Receipts = receiptList[index]
return nil
}
return q.deliver(id, q.receiptTaskPool, q.receiptTaskQueue, q.receiptPendPool, q.receiptDonePool, receiptReqTimer, len(receiptList), reconstruct)
}
// deliver injects a data retrieval response into the results queue.
func (q *queue) deliver(id string, taskPool map[common.Hash]*types.Header, taskQueue *prque.Prque, pendPool map[string]*fetchRequest,
donePool map[common.Hash]struct{}, reqTimer metrics.Timer, results int, reconstruct func(header *types.Header, index int, result *fetchResult) error) error {
q.lock.Lock()
defer q.lock.Unlock()
if q.blockOffset < offset {
q.blockOffset = offset
// Short circuit if the data was never requested
request := pendPool[id]
if request == nil {
return errNoFetchesPending
}
reqTimer.UpdateSince(request.Time)
delete(pendPool, id)
// If no data items were retrieved, mark them as unavailable for the origin peer
if results == 0 {
for hash, _ := range request.Headers {
request.Peer.ignored.Add(hash)
}
}
// Assemble each of the results with their headers and retrieved data parts
errs := make([]error, 0)
for i, header := range request.Headers {
// Short circuit assembly if no more fetch results are found
if i >= results {
break
}
// Reconstruct the next result if contents match up
index := int(header.Number.Int64() - int64(q.resultOffset))
if index >= len(q.resultCache) || index < 0 || q.resultCache[index] == nil {
errs = []error{errInvalidChain}
break
}
if err := reconstruct(header, i, q.resultCache[index]); err != nil {
errs = []error{err}
break
}
donePool[header.Hash()] = struct{}{}
q.resultCache[index].Pending--
// Clean up a successful fetch
request.Headers[i] = nil
delete(taskPool, header.Hash())
}
// Return all failed or missing fetches to the queue
for _, header := range request.Headers {
if header != nil {
taskQueue.Push(header, -float32(header.Number.Uint64()))
}
}
// If none of the blocks were good, it's a stale delivery
switch {
case len(errs) == 0:
return nil
case len(errs) == 1 && (errs[0] == errInvalidChain || errs[0] == errInvalidBody || errs[0] == errInvalidReceipt):
return errs[0]
case len(errs) == len(request.Headers):
return errStaleDelivery
default:
return fmt.Errorf("multiple failures: %v", errs)
}
}
// Prepare configures the result cache to allow accepting and caching inbound
// fetch results.
func (q *queue) Prepare(offset uint64, parts int) {
q.lock.Lock()
defer q.lock.Unlock()
if q.resultOffset < offset {
q.resultOffset = offset
}
q.resultParts = parts
}

43
eth/handler.go
View File

@ -120,15 +120,25 @@ func NewProtocolManager(mode Mode, networkId int, mux *event.TypeMux, txpool txP
return nil, errIncompatibleConfig
}
// Construct the different synchronisation mechanisms
manager.downloader = downloader.New(manager.eventMux, manager.blockchain.HasBlock, manager.blockchain.GetBlock, manager.blockchain.CurrentBlock, manager.blockchain.GetTd, manager.blockchain.InsertChain, manager.removePeer)
var syncMode downloader.SyncMode
switch mode {
case ArchiveMode:
syncMode = downloader.FullSync
case FullMode:
syncMode = downloader.FastSync
case LightMode:
syncMode = downloader.LightSync
}
manager.downloader = downloader.New(syncMode, manager.eventMux, blockchain.HasHeader, blockchain.HasBlock, blockchain.GetHeader, blockchain.GetBlock,
blockchain.CurrentHeader, blockchain.CurrentBlock, blockchain.GetTd, blockchain.InsertHeaderChain, blockchain.InsertChain, nil, manager.removePeer)
validator := func(block *types.Block, parent *types.Block) error {
return core.ValidateHeader(pow, block.Header(), parent.Header(), true, false)
}
heighter := func() uint64 {
return manager.blockchain.CurrentBlock().NumberU64()
return blockchain.CurrentBlock().NumberU64()
}
manager.fetcher = fetcher.New(manager.blockchain.GetBlock, validator, manager.BroadcastBlock, heighter, manager.blockchain.InsertChain, manager.removePeer)
manager.fetcher = fetcher.New(blockchain.GetBlock, validator, manager.BroadcastBlock, heighter, blockchain.InsertChain, manager.removePeer)
return manager, nil
}
@ -210,7 +220,7 @@ func (pm *ProtocolManager) handle(p *peer) error {
// Register the peer in the downloader. If the downloader considers it banned, we disconnect
if err := pm.downloader.RegisterPeer(p.id, p.version, p.Head(),
p.RequestHashes, p.RequestHashesFromNumber, p.RequestBlocks,
p.RequestHeadersByHash, p.RequestHeadersByNumber, p.RequestBodies); err != nil {
p.RequestHeadersByHash, p.RequestHeadersByNumber, p.RequestBodies, p.RequestReceipts); err != nil {
return err
}
// Propagate existing transactions. new transactions appearing
@ -514,22 +524,31 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
var (
hash common.Hash
bytes int
receipts []*types.Receipt
receipts []rlp.RawValue
)
for bytes < softResponseLimit && len(receipts) < downloader.MaxReceiptsFetch {
// Retrieve the hash of the next transaction receipt
for bytes < softResponseLimit && len(receipts) < downloader.MaxReceiptFetch {
// Retrieve the hash of the next block
if err := msgStream.Decode(&hash); err == rlp.EOL {
break
} else if err != nil {
return errResp(ErrDecode, "msg %v: %v", msg, err)
}
// Retrieve the requested receipt, stopping if enough was found
if receipt := core.GetReceipt(pm.chaindb, hash); receipt != nil {
receipts = append(receipts, receipt)
bytes += len(receipt.RlpEncode())
// Retrieve the requested block's receipts, skipping if unknown to us
results := core.GetBlockReceipts(pm.chaindb, hash)
if results == nil {
if header := pm.blockchain.GetHeader(hash); header == nil || header.ReceiptHash != types.EmptyRootHash {
continue
}
}
// If known, encode and queue for response packet
if encoded, err := rlp.EncodeToBytes(results); err != nil {
glog.V(logger.Error).Infof("failed to encode receipt: %v", err)
} else {
receipts = append(receipts, encoded)
bytes += len(encoded)
}
}
return p.SendReceipts(receipts)
return p.SendReceiptsRLP(receipts)
case msg.Code == NewBlockHashesMsg:
// Retrieve and deseralize the remote new block hashes notification

13
eth/handler_test.go
View File

@ -535,15 +535,12 @@ func testGetReceipt(t *testing.T, protocol int) {
defer peer.close()
// Collect the hashes to request, and the response to expect
hashes := []common.Hash{}
hashes, receipts := []common.Hash{}, []types.Receipts{}
for i := uint64(0); i <= pm.blockchain.CurrentBlock().NumberU64(); i++ {
for _, tx := range pm.blockchain.GetBlockByNumber(i).Transactions() {
hashes = append(hashes, tx.Hash())
}
}
receipts := make([]*types.Receipt, len(hashes))
for i, hash := range hashes {
receipts[i] = core.GetReceipt(pm.chaindb, hash)
block := pm.blockchain.GetBlockByNumber(i)
hashes = append(hashes, block.Hash())
receipts = append(receipts, core.GetBlockReceipts(pm.chaindb, block.Hash()))
}
// Send the hash request and verify the response
p2p.Send(peer.app, 0x0f, hashes)

6
eth/peer.go
View File

@ -197,9 +197,9 @@ func (p *peer) SendNodeData(data [][]byte) error {
return p2p.Send(p.rw, NodeDataMsg, data)
}
// SendReceipts sends a batch of transaction receipts, corresponding to the ones
// requested.
func (p *peer) SendReceipts(receipts []*types.Receipt) error {
// SendReceiptsRLP sends a batch of transaction receipts, corresponding to the
// ones requested from an already RLP encoded format.
func (p *peer) SendReceiptsRLP(receipts []rlp.RawValue) error {
return p2p.Send(p.rw, ReceiptsMsg, receipts)
}