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eth/downloader: concurrent receipt and state processing

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This commit is contained in:
Péter Szilágyi 2015-10-07 12:14:30 +03:00
parent ab27bee25a
commit b97e34a8e4
15 changed files with 526 additions and 269 deletions
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11
core/block_processor.go
View File

@ -383,6 +383,15 @@ func (sm *BlockProcessor) ValidateHeader(header *types.Header, checkPow, uncle b
}
}
// ValidateHeaderWithParent verifies the validity of a header, relying on the database and
// POW behind the block processor.
func (sm *BlockProcessor) ValidateHeaderWithParent(header, parent *types.Header, checkPow, uncle bool) error {
if sm.bc.HasHeader(header.Hash()) {
return nil
}
return ValidateHeader(sm.Pow, header, parent, checkPow, uncle)
}
// See YP section 4.3.4. "Block Header Validity"
// Validates a header. Returns an error if the header is invalid.
func ValidateHeader(pow pow.PoW, header *types.Header, parent *types.Header, checkPow, uncle bool) error {
@ -425,7 +434,7 @@ func ValidateHeader(pow pow.PoW, header *types.Header, parent *types.Header, che
if checkPow {
// Verify the nonce of the header. Return an error if it's not valid
if !pow.Verify(types.NewBlockWithHeader(header)) {
return ValidationError("Header's nonce is invalid (= %x)", header.Nonce)
return &BlockNonceErr{Hash: header.Hash(), Number: header.Number, Nonce: header.Nonce.Uint64()}
}
}
return nil

182
core/blockchain.go
View File

@ -22,6 +22,8 @@ import (
"fmt"
"io"
"math/big"
"math/rand"
"runtime"
"sync"
"sync/atomic"
"time"
@ -671,7 +673,7 @@ func (self *BlockChain) writeHeader(header *types.Header) error {
// should be done or not. The reason behind the optional check is because some
// of the header retrieval mechanisms already need to verfy nonces, as well as
// because nonces can be verified sparsely, not needing to check each.
func (self *BlockChain) InsertHeaderChain(chain []*types.Header, verify bool) (int, error) {
func (self *BlockChain) InsertHeaderChain(chain []*types.Header, checkFreq int) (int, error) {
self.wg.Add(1)
defer self.wg.Done()
@ -683,16 +685,85 @@ func (self *BlockChain) InsertHeaderChain(chain []*types.Header, verify bool) (i
stats := struct{ processed, ignored int }{}
start := time.Now()
// Start the parallel nonce verifier, with a fake nonce if not requested
verifier := self.pow
if !verify {
verifier = FakePow{}
// Generate the list of headers that should be POW verified
verify := make([]bool, len(chain))
for i := 0; i < len(verify)/checkFreq; i++ {
index := i*checkFreq + rand.Intn(checkFreq)
if index >= len(verify) {
index = len(verify) - 1
}
nonceAbort, nonceResults := verifyNoncesFromHeaders(verifier, chain)
defer close(nonceAbort)
verify[index] = true
}
verify[len(verify)-1] = true // Last should always be verified to avoid junk
// Iterate over the headers, inserting any new ones
complete := make([]bool, len(chain))
// Create the header verification task queue and worker functions
tasks := make(chan int, len(chain))
for i := 0; i < len(chain); i++ {
tasks <- i
}
close(tasks)
errs, failed := make([]error, len(tasks)), int32(0)
process := func(worker int) {
for index := range tasks {
header, hash := chain[index], chain[index].Hash()
// Short circuit insertion if shutting down or processing failed
if atomic.LoadInt32(&self.procInterrupt) == 1 {
return
}
if atomic.LoadInt32(&failed) > 0 {
return
}
// Short circuit if the header is bad or already known
if BadHashes[hash] {
errs[index] = BadHashError(hash)
atomic.AddInt32(&failed, 1)
return
}
if self.HasHeader(hash) {
continue
}
// Verify that the header honors the chain parameters
checkPow := verify[index]
var err error
if index == 0 {
err = self.processor.ValidateHeader(header, checkPow, false)
} else {
err = self.processor.ValidateHeaderWithParent(header, chain[index-1], checkPow, false)
}
if err != nil {
errs[index] = err
atomic.AddInt32(&failed, 1)
return
}
}
}
// Start as many worker threads as goroutines allowed
pending := new(sync.WaitGroup)
for i := 0; i < runtime.GOMAXPROCS(0); i++ {
pending.Add(1)
go func(id int) {
defer pending.Done()
process(id)
}(i)
}
pending.Wait()
// If anything failed, report
if atomic.LoadInt32(&self.procInterrupt) == 1 {
glog.V(logger.Debug).Infoln("premature abort during receipt chain processing")
return 0, nil
}
if failed > 0 {
for i, err := range errs {
if err != nil {
return i, err
}
}
}
// All headers passed verification, import them into the database
for i, header := range chain {
// Short circuit insertion if shutting down
if atomic.LoadInt32(&self.procInterrupt) == 1 {
@ -701,24 +772,7 @@ func (self *BlockChain) InsertHeaderChain(chain []*types.Header, verify bool) (i
}
hash := header.Hash()
// Accumulate verification results until the next header is verified
for !complete[i] {
if res := <-nonceResults; res.valid {
complete[res.index] = true
} else {
header := chain[res.index]
return res.index, &BlockNonceErr{
Hash: header.Hash(),
Number: new(big.Int).Set(header.Number),
Nonce: header.Nonce.Uint64(),
}
}
}
if BadHashes[hash] {
glog.V(logger.Error).Infof("bad header %d [%x…], known bad hash", header.Number, hash)
return i, BadHashError(hash)
}
// Write the header to the chain and get the status
// If the header's already known, skip it, otherwise store
if self.HasHeader(hash) {
stats.ignored++
continue
@ -743,26 +797,37 @@ func (self *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain
defer self.wg.Done()
// Collect some import statistics to report on
stats := struct{ processed, ignored int }{}
stats := struct{ processed, ignored int32 }{}
start := time.Now()
// Iterate over the blocks and receipts, inserting any new ones
// Create the block importing task queue and worker functions
tasks := make(chan int, len(blockChain))
for i := 0; i < len(blockChain) && i < len(receiptChain); i++ {
block, receipts := blockChain[i], receiptChain[i]
tasks <- i
}
close(tasks)
// Short circuit insertion if shutting down
errs, failed := make([]error, len(tasks)), int32(0)
process := func(worker int) {
for index := range tasks {
block, receipts := blockChain[index], receiptChain[index]
// Short circuit insertion if shutting down or processing failed
if atomic.LoadInt32(&self.procInterrupt) == 1 {
glog.V(logger.Debug).Infoln("premature abort during receipt chain processing")
break
return
}
if atomic.LoadInt32(&failed) > 0 {
return
}
// Short circuit if the owner header is unknown
if !self.HasHeader(block.Hash()) {
glog.V(logger.Debug).Infof("containing header #%d [%x…] unknown", block.Number(), block.Hash().Bytes()[:4])
return i, fmt.Errorf("containing header #%d [%x…] unknown", block.Number(), block.Hash().Bytes()[:4])
errs[index] = fmt.Errorf("containing header #%d [%x…] unknown", block.Number(), block.Hash().Bytes()[:4])
atomic.AddInt32(&failed, 1)
return
}
// Skip if the entire data is already known
if self.HasBlock(block.Hash()) {
stats.ignored++
atomic.AddInt32(&stats.ignored, 1)
continue
}
// Compute all the non-consensus fields of the receipts
@ -794,25 +859,54 @@ func (self *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain
}
// Write all the data out into the database
if err := WriteBody(self.chainDb, block.Hash(), &types.Body{block.Transactions(), block.Uncles()}); err != nil {
glog.Fatalf("failed to write block body: %v", err)
return i, err
errs[index] = fmt.Errorf("failed to write block body: %v", err)
atomic.AddInt32(&failed, 1)
glog.Fatal(errs[index])
return
}
if err := PutBlockReceipts(self.chainDb, block.Hash(), receipts); err != nil {
glog.Fatalf("failed to write block receipts: %v", err)
errs[index] = fmt.Errorf("failed to write block receipts: %v", err)
atomic.AddInt32(&failed, 1)
glog.Fatal(errs[index])
return
}
atomic.AddInt32(&stats.processed, 1)
}
}
// Start as many worker threads as goroutines allowed
pending := new(sync.WaitGroup)
for i := 0; i < runtime.GOMAXPROCS(0); i++ {
pending.Add(1)
go func(id int) {
defer pending.Done()
process(id)
}(i)
}
pending.Wait()
// If anything failed, report
if atomic.LoadInt32(&self.procInterrupt) == 1 {
glog.V(logger.Debug).Infoln("premature abort during receipt chain processing")
return 0, nil
}
if failed > 0 {
for i, err := range errs {
if err != nil {
return i, err
}
}
}
// Update the head fast sync block if better
self.mu.Lock()
if self.GetTd(self.currentFastBlock.Hash()).Cmp(self.GetTd(block.Hash())) < 0 {
if err := WriteHeadFastBlockHash(self.chainDb, block.Hash()); err != nil {
head := blockChain[len(errs)-1]
if self.GetTd(self.currentFastBlock.Hash()).Cmp(self.GetTd(head.Hash())) < 0 {
if err := WriteHeadFastBlockHash(self.chainDb, head.Hash()); err != nil {
glog.Fatalf("failed to update head fast block hash: %v", err)
}
self.currentFastBlock = block
self.currentFastBlock = head
}
self.mu.Unlock()
stats.processed++
}
// Report some public statistics so the user has a clue what's going on
first, last := blockChain[0], blockChain[len(blockChain)-1]
glog.V(logger.Info).Infof("imported %d receipt(s) (%d ignored) in %v. #%d [%x… / %x…]", stats.processed, stats.ignored,

27
core/blockchain_test.go
View File

@ -94,7 +94,7 @@ func testFork(t *testing.T, processor *BlockProcessor, i, n int, full bool, comp
}
} else {
headerChainB = makeHeaderChain(processor2.bc.CurrentHeader(), n, db, forkSeed)
if _, err := processor2.bc.InsertHeaderChain(headerChainB, true); err != nil {
if _, err := processor2.bc.InsertHeaderChain(headerChainB, 1); err != nil {
t.Fatalf("failed to insert forking chain: %v", err)
}
}
@ -416,6 +416,8 @@ func TestChainMultipleInsertions(t *testing.T) {
type bproc struct{}
func (bproc) Process(*types.Block) (vm.Logs, types.Receipts, error) { return nil, nil, nil }
func (bproc) ValidateHeader(*types.Header, bool, bool) error { return nil }
func (bproc) ValidateHeaderWithParent(*types.Header, *types.Header, bool, bool) error { return nil }
func makeHeaderChainWithDiff(genesis *types.Block, d []int, seed byte) []*types.Header {
blocks := makeBlockChainWithDiff(genesis, d, seed)
@ -492,8 +494,8 @@ func testReorg(t *testing.T, first, second []int, td int64, full bool) {
bc.InsertChain(makeBlockChainWithDiff(genesis, first, 11))
bc.InsertChain(makeBlockChainWithDiff(genesis, second, 22))
} else {
bc.InsertHeaderChain(makeHeaderChainWithDiff(genesis, first, 11), false)
bc.InsertHeaderChain(makeHeaderChainWithDiff(genesis, second, 22), false)
bc.InsertHeaderChain(makeHeaderChainWithDiff(genesis, first, 11), 1)
bc.InsertHeaderChain(makeHeaderChainWithDiff(genesis, second, 22), 1)
}
// Check that the chain is valid number and link wise
if full {
@ -543,7 +545,7 @@ func testBadHashes(t *testing.T, full bool) {
} else {
headers := makeHeaderChainWithDiff(genesis, []int{1, 2, 4}, 10)
BadHashes[headers[2].Hash()] = true
_, err = bc.InsertHeaderChain(headers, true)
_, err = bc.InsertHeaderChain(headers, 1)
}
if !IsBadHashError(err) {
t.Errorf("error mismatch: want: BadHashError, have: %v", err)
@ -575,7 +577,7 @@ func testReorgBadHashes(t *testing.T, full bool) {
BadHashes[blocks[3].Header().Hash()] = true
defer func() { delete(BadHashes, blocks[3].Header().Hash()) }()
} else {
if _, err := bc.InsertHeaderChain(headers, true); err != nil {
if _, err := bc.InsertHeaderChain(headers, 1); err != nil {
t.Fatalf("failed to import headers: %v", err)
}
if bc.CurrentHeader().Hash() != headers[3].Hash() {
@ -631,6 +633,8 @@ func testInsertNonceError(t *testing.T, full bool) {
failHash = blocks[failAt].Hash()
processor.bc.pow = failPow{failNum}
processor.Pow = failPow{failNum}
failRes, err = processor.bc.InsertChain(blocks)
} else {
headers := makeHeaderChain(processor.bc.CurrentHeader(), i, db, 0)
@ -640,7 +644,9 @@ func testInsertNonceError(t *testing.T, full bool) {
failHash = headers[failAt].Hash()
processor.bc.pow = failPow{failNum}
failRes, err = processor.bc.InsertHeaderChain(headers, true)
processor.Pow = failPow{failNum}
failRes, err = processor.bc.InsertHeaderChain(headers, 1)
}
// Check that the returned error indicates the nonce failure.
if failRes != failAt {
@ -714,12 +720,13 @@ func TestFastVsFullChains(t *testing.T) {
fastDb, _ := ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(fastDb, GenesisAccount{address, funds})
fast, _ := NewBlockChain(fastDb, FakePow{}, new(event.TypeMux))
fast.SetProcessor(NewBlockProcessor(fastDb, FakePow{}, fast, new(event.TypeMux)))
headers := make([]*types.Header, len(blocks))
for i, block := range blocks {
headers[i] = block.Header()
}
if n, err := fast.InsertHeaderChain(headers, true); err != nil {
if n, err := fast.InsertHeaderChain(headers, 1); err != nil {
t.Fatalf("failed to insert header %d: %v", n, err)
}
if n, err := fast.InsertReceiptChain(blocks, receipts); err != nil {
@ -796,12 +803,13 @@ func TestLightVsFastVsFullChainHeads(t *testing.T) {
fastDb, _ := ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(fastDb, GenesisAccount{address, funds})
fast, _ := NewBlockChain(fastDb, FakePow{}, new(event.TypeMux))
fast.SetProcessor(NewBlockProcessor(fastDb, FakePow{}, fast, new(event.TypeMux)))
headers := make([]*types.Header, len(blocks))
for i, block := range blocks {
headers[i] = block.Header()
}
if n, err := fast.InsertHeaderChain(headers, true); err != nil {
if n, err := fast.InsertHeaderChain(headers, 1); err != nil {
t.Fatalf("failed to insert header %d: %v", n, err)
}
if n, err := fast.InsertReceiptChain(blocks, receipts); err != nil {
@ -813,8 +821,9 @@ func TestLightVsFastVsFullChainHeads(t *testing.T) {
lightDb, _ := ethdb.NewMemDatabase()
WriteGenesisBlockForTesting(lightDb, GenesisAccount{address, funds})
light, _ := NewBlockChain(lightDb, FakePow{}, new(event.TypeMux))
light.SetProcessor(NewBlockProcessor(lightDb, FakePow{}, light, new(event.TypeMux)))
if n, err := light.InsertHeaderChain(headers, true); err != nil {
if n, err := light.InsertHeaderChain(headers, 1); err != nil {
t.Fatalf("failed to insert header %d: %v", n, err)
}
assert(t, "light", light, height, 0, 0)

2
core/chain_makers.go
View File

@ -239,7 +239,7 @@ func newCanonical(n int, full bool) (ethdb.Database, *BlockProcessor, error) {
}
// Header-only chain requested
headers := makeHeaderChain(genesis.Header(), n, db, canonicalSeed)
_, err := blockchain.InsertHeaderChain(headers, true)
_, err := blockchain.InsertHeaderChain(headers, 1)
return db, processor, err
}

2
core/error.go
View File

@ -111,7 +111,7 @@ type BlockNonceErr struct {
}
func (err *BlockNonceErr) Error() string {
return fmt.Sprintf("block %d (%v) nonce is invalid (got %d)", err.Number, err.Hash, err.Nonce)
return fmt.Sprintf("nonce for #%d [%x…] is invalid (got %d)", err.Number, err.Hash, err.Nonce)
}
// IsBlockNonceErr returns true for invalid block nonce errors.

75
core/state/sync.go
View File

@ -21,32 +21,22 @@ import (
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto/sha3"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/trie"
)
type StateSync struct {
db ethdb.Database
sync *trie.TrieSync
codeReqs map[common.Hash]struct{} // requested but not yet written to database
codeReqList []common.Hash // requested since last Missing
}
// StateSync is the main state synchronisation scheduler, which provides yet the
// unknown state hashes to retrieve, accepts node data associated with said hashes
// and reconstructs the state database step by step until all is done.
type StateSync trie.TrieSync
var sha3_nil = common.BytesToHash(sha3.NewKeccak256().Sum(nil))
// NewStateSync create a new state trie download scheduler.
func NewStateSync(root common.Hash, database ethdb.Database) *StateSync {
// Pre-declare the result syncer t
var syncer *trie.TrieSync
func NewStateSync(root common.Hash, db ethdb.Database) *StateSync {
ss := &StateSync{
db: db,
codeReqs: make(map[common.Hash]struct{}),
}
ss.codeReqs[sha3_nil] = struct{}{} // never request the nil hash
ss.sync = trie.NewTrieSync(root, db, ss.leafFound)
return ss
}
func (self *StateSync) leafFound(leaf []byte, parent common.Hash) error {
callback := func(leaf []byte, parent common.Hash) error {
var obj struct {
Nonce uint64
Balance *big.Int
@ -56,43 +46,26 @@ func (self *StateSync) leafFound(leaf []byte, parent common.Hash) error {
if err := rlp.Decode(bytes.NewReader(leaf), &obj); err != nil {
return err
}
self.sync.AddSubTrie(obj.Root, 64, parent, nil)
syncer.AddSubTrie(obj.Root, 64, parent, nil)
syncer.AddRawEntry(common.BytesToHash(obj.CodeHash), 64, parent)
codehash := common.BytesToHash(obj.CodeHash)
if _, ok := self.codeReqs[codehash]; !ok {
code, _ := self.db.Get(obj.CodeHash)
if code == nil {
self.codeReqs[codehash] = struct{}{}
self.codeReqList = append(self.codeReqList, codehash)
}
}
return nil
}
func (self *StateSync) Missing(max int) []common.Hash {
cr := len(self.codeReqList)
gh := 0
if max != 0 {
if cr > max {
cr = max
}
gh = max - cr
}
list := append(self.sync.Missing(gh), self.codeReqList[:cr]...)
self.codeReqList = self.codeReqList[cr:]
return list
syncer = trie.NewTrieSync(root, database, callback)
return (*StateSync)(syncer)
}
func (self *StateSync) Process(list []trie.SyncResult) error {
for i := 0; i < len(list); i++ {
if _, ok := self.codeReqs[list[i].Hash]; ok { // code data, not a node
self.db.Put(list[i].Hash[:], list[i].Data)
delete(self.codeReqs, list[i].Hash)
list[i] = list[len(list)-1]
list = list[:len(list)-1]
i--
// Missing retrieves the known missing nodes from the state trie for retrieval.
func (s *StateSync) Missing(max int) []common.Hash {
return (*trie.TrieSync)(s).Missing(max)
}
// Process injects a batch of retrieved trie nodes data.
func (s *StateSync) Process(list []trie.SyncResult) (int, error) {
return (*trie.TrieSync)(s).Process(list)
}
_, err := self.sync.Process(list)
return err
// Pending returns the number of state entries currently pending for download.
func (s *StateSync) Pending() int {
return (*trie.TrieSync)(s).Pending()
}

16
core/state/sync_test.go
View File

@ -115,8 +115,8 @@ func testIterativeStateSync(t *testing.T, batch int) {
}
results[i] = trie.SyncResult{hash, data}
}
if err := sched.Process(results); err != nil {
t.Fatalf("failed to process results: %v", err)
if index, err := sched.Process(results); err != nil {
t.Fatalf("failed to process result #%d: %v", index, err)
}
queue = append(queue[:0], sched.Missing(batch)...)
}
@ -145,8 +145,8 @@ func TestIterativeDelayedStateSync(t *testing.T) {
}
results[i] = trie.SyncResult{hash, data}
}
if err := sched.Process(results); err != nil {
t.Fatalf("failed to process results: %v", err)
if index, err := sched.Process(results); err != nil {
t.Fatalf("failed to process result #%d: %v", index, err)
}
queue = append(queue[len(results):], sched.Missing(0)...)
}
@ -183,8 +183,8 @@ func testIterativeRandomStateSync(t *testing.T, batch int) {
results = append(results, trie.SyncResult{hash, data})
}
// Feed the retrieved results back and queue new tasks
if err := sched.Process(results); err != nil {
t.Fatalf("failed to process results: %v", err)
if index, err := sched.Process(results); err != nil {
t.Fatalf("failed to process result #%d: %v", index, err)
}
queue = make(map[common.Hash]struct{})
for _, hash := range sched.Missing(batch) {
@ -226,8 +226,8 @@ func TestIterativeRandomDelayedStateSync(t *testing.T) {
}
}
// Feed the retrieved results back and queue new tasks
if err := sched.Process(results); err != nil {
t.Fatalf("failed to process results: %v", err)
if index, err := sched.Process(results); err != nil {
t.Fatalf("failed to process result #%d: %v", index, err)
}
for _, hash := range sched.Missing(0) {
queue[hash] = struct{}{}

2
core/types/common.go
View File

@ -20,4 +20,6 @@ import "github.com/ethereum/go-ethereum/core/vm"
type BlockProcessor interface {
Process(*Block) (vm.Logs, Receipts, error)
ValidateHeader(*Header, bool, bool) error
ValidateHeaderWithParent(*Header, *Header, bool, bool) error
}

62
eth/downloader/downloader.go
View File

@ -830,7 +830,7 @@ func (d *Downloader) fetchBlocks61(from uint64) error {
}
// If there's nothing more to fetch, wait or terminate
if d.queue.PendingBlocks() == 0 {
if d.queue.InFlight() == 0 && finished {
if !d.queue.InFlightBlocks() && finished {
glog.V(logger.Debug).Infof("Block fetching completed")
return nil
}
@ -864,7 +864,7 @@ func (d *Downloader) fetchBlocks61(from uint64) error {
}
// Make sure that we have peers available for fetching. If all peers have been tried
// and all failed throw an error
if !throttled && d.queue.InFlight() == 0 && len(idles) == total {
if !throttled && !d.queue.InFlightBlocks() && len(idles) == total {
return errPeersUnavailable
}
}
@ -1124,7 +1124,7 @@ func (d *Downloader) fetchHeaders(p *peer, td *big.Int, from uint64) error {
glog.V(logger.Detail).Infof("%v: schedule %d headers from #%d", p, len(headers), from)
if d.mode == FastSync || d.mode == LightSync {
if n, err := d.insertHeaders(headers, false); err != nil {
if n, err := d.insertHeaders(headers, headerCheckFrequency); err != nil {
glog.V(logger.Debug).Infof("%v: invalid header #%d [%x…]: %v", p, headers[n].Number, headers[n].Hash().Bytes()[:4], err)
return errInvalidChain
}
@ -1194,8 +1194,8 @@ func (d *Downloader) fetchBodies(from uint64) error {
setIdle = func(p *peer) { p.SetBlocksIdle() }
)
err := d.fetchParts(errCancelBodyFetch, d.bodyCh, deliver, d.bodyWakeCh, expire,
d.queue.PendingBlocks, d.queue.ThrottleBlocks, d.queue.ReserveBodies, d.bodyFetchHook,
fetch, d.queue.CancelBodies, capacity, getIdles, setIdle, "Body")
d.queue.PendingBlocks, d.queue.InFlightBlocks, d.queue.ThrottleBlocks, d.queue.ReserveBodies,
d.bodyFetchHook, fetch, d.queue.CancelBodies, capacity, getIdles, setIdle, "Body")
glog.V(logger.Debug).Infof("Block body download terminated: %v", err)
return err
@ -1218,8 +1218,8 @@ func (d *Downloader) fetchReceipts(from uint64) error {
setIdle = func(p *peer) { p.SetReceiptsIdle() }
)
err := d.fetchParts(errCancelReceiptFetch, d.receiptCh, deliver, d.receiptWakeCh, expire,
d.queue.PendingReceipts, d.queue.ThrottleReceipts, d.queue.ReserveReceipts, d.receiptFetchHook,
fetch, d.queue.CancelReceipts, capacity, d.peers.ReceiptIdlePeers, setIdle, "Receipt")
d.queue.PendingReceipts, d.queue.InFlightReceipts, d.queue.ThrottleReceipts, d.queue.ReserveReceipts,
d.receiptFetchHook, fetch, d.queue.CancelReceipts, capacity, d.peers.ReceiptIdlePeers, setIdle, "Receipt")
glog.V(logger.Debug).Infof("Receipt download terminated: %v", err)
return err
@ -1234,15 +1234,29 @@ func (d *Downloader) fetchNodeData() error {
var (
deliver = func(packet dataPack) error {
start := time.Now()
done, found, err := d.queue.DeliverNodeData(packet.PeerId(), packet.(*statePack).states)
return d.queue.DeliverNodeData(packet.PeerId(), packet.(*statePack).states, func(err error, delivered int) {
if err != nil {
// If the node data processing failed, the root hash is very wrong, abort
glog.V(logger.Error).Infof("peer %d: state processing failed: %v", packet.PeerId(), err)
d.cancel()
return
}
// Processing succeeded, notify state fetcher and processor of continuation
if d.queue.PendingNodeData() == 0 {
go d.process()
} else {
select {
case d.stateWakeCh <- true:
default:
}
}
// Log a message to the user and return
d.syncStatsLock.Lock()
totalDone, totalKnown := d.syncStatsStateDone+uint64(done), d.syncStatsStateTotal+uint64(found)
d.syncStatsStateDone, d.syncStatsStateTotal = totalDone, totalKnown
d.syncStatsLock.Unlock()
defer d.syncStatsLock.Unlock()
glog.V(logger.Info).Infof("imported %d [%d / %d] state entries in %v.", done, totalDone, totalKnown, time.Since(start))
return err
d.syncStatsStateDone += uint64(delivered)
glog.V(logger.Info).Infof("imported %d state entries in %v: processed %d in total", delivered, time.Since(start), d.syncStatsStateDone)
})
}
expire = func() []string { return d.queue.ExpireNodeData(stateHardTTL) }
throttle = func() bool { return false }
@ -1254,8 +1268,8 @@ func (d *Downloader) fetchNodeData() error {
setIdle = func(p *peer) { p.SetNodeDataIdle() }
)
err := d.fetchParts(errCancelReceiptFetch, d.stateCh, deliver, d.stateWakeCh, expire,
d.queue.PendingNodeData, throttle, reserve, nil, fetch, d.queue.CancelNodeData,
capacity, d.peers.ReceiptIdlePeers, setIdle, "State")
d.queue.PendingNodeData, d.queue.InFlightNodeData, throttle, reserve, nil, fetch,
d.queue.CancelNodeData, capacity, d.peers.ReceiptIdlePeers, setIdle, "State")
glog.V(logger.Debug).Infof("Node state data download terminated: %v", err)
return err
@ -1265,8 +1279,9 @@ func (d *Downloader) fetchNodeData() error {
// peers, reserving a chunk of fetch requests for each, waiting for delivery and
// also periodically checking for timeouts.
func (d *Downloader) fetchParts(errCancel error, deliveryCh chan dataPack, deliver func(packet dataPack) error, wakeCh chan bool,
expire func() []string, pending func() int, throttle func() bool, reserve func(*peer, int) (*fetchRequest, bool, error), fetchHook func([]*types.Header),
fetch func(*peer, *fetchRequest) error, cancel func(*fetchRequest), capacity func(*peer) int, idle func() ([]*peer, int), setIdle func(*peer), kind string) error {
expire func() []string, pending func() int, inFlight func() bool, throttle func() bool, reserve func(*peer, int) (*fetchRequest, bool, error),
fetchHook func([]*types.Header), fetch func(*peer, *fetchRequest) error, cancel func(*fetchRequest), capacity func(*peer) int,
idle func() ([]*peer, int), setIdle func(*peer), kind string) error {
// Create a ticker to detect expired retreival tasks
ticker := time.NewTicker(100 * time.Millisecond)
@ -1378,14 +1393,14 @@ func (d *Downloader) fetchParts(errCancel error, deliveryCh chan dataPack, deliv
}
// If there's nothing more to fetch, wait or terminate
if pending() == 0 {
if d.queue.InFlight() == 0 && finished {
if !inFlight() && finished {
glog.V(logger.Debug).Infof("%s fetching completed", kind)
return nil
}
break
}
// Send a download request to all idle peers, until throttled
progressed, throttled := false, false
progressed, throttled, running := false, false, inFlight()
idles, total := idle()
for _, peer := range idles {
@ -1423,10 +1438,11 @@ func (d *Downloader) fetchParts(errCancel error, deliveryCh chan dataPack, deliv
glog.V(logger.Error).Infof("%v: %s fetch failed, rescheduling", peer, strings.ToLower(kind))
cancel(request)
}
running = true
}
// Make sure that we have peers available for fetching. If all peers have been tried
// and all failed throw an error
if !progressed && !throttled && d.queue.InFlight() == 0 && len(idles) == total {
if !progressed && !throttled && !running && len(idles) == total && pending() > 0 {
return errPeersUnavailable
}
}
@ -1514,12 +1530,12 @@ func (d *Downloader) process() {
)
switch {
case len(headers) > 0:
index, err = d.insertHeaders(headers, true)
index, err = d.insertHeaders(headers, headerCheckFrequency)
case len(receipts) > 0:
index, err = d.insertReceipts(blocks, receipts)
if err == nil && blocks[len(blocks)-1].NumberU64() == d.queue.fastSyncPivot {
err = d.commitHeadBlock(blocks[len(blocks)-1].Hash())
index, err = len(blocks)-1, d.commitHeadBlock(blocks[len(blocks)-1].Hash())
}
default:
index, err = d.insertBlocks(blocks)

4
eth/downloader/downloader_test.go
View File

@ -268,7 +268,7 @@ func (dl *downloadTester) getTd(hash common.Hash) *big.Int {
}
// insertHeaders injects a new batch of headers into the simulated chain.
func (dl *downloadTester) insertHeaders(headers []*types.Header, verify bool) (int, error) {
func (dl *downloadTester) insertHeaders(headers []*types.Header, checkFreq int) (int, error) {
dl.lock.Lock()
defer dl.lock.Unlock()
@ -1262,7 +1262,7 @@ func testForkedSyncBoundaries(t *testing.T, protocol int, mode SyncMode) {
pending.Wait()
// Simulate a successful sync above the fork
tester.downloader.syncStatsOrigin = tester.downloader.syncStatsHeight
tester.downloader.syncStatsChainOrigin = tester.downloader.syncStatsChainHeight
// Synchronise with the second fork and check boundary resets
tester.newPeer("fork B", protocol, hashesB, headersB, blocksB, receiptsB)

156
eth/downloader/queue.go
View File

@ -23,6 +23,7 @@ import (
"errors"
"fmt"
"sync"
"sync/atomic"
"time"
"github.com/ethereum/go-ethereum/common"
@ -95,6 +96,8 @@ type queue struct {
stateDatabase ethdb.Database // [eth/63] Trie database to populate during state reassembly
stateScheduler *state.StateSync // [eth/63] State trie synchronisation scheduler and integrator
stateProcessors int32 // [eth/63] Number of currently running state processors
stateSchedLock sync.RWMutex // [eth/63] Lock serializing access to the state scheduler
resultCache []*fetchResult // Downloaded but not yet delivered fetch results
resultOffset uint64 // Offset of the first cached fetch result in the block-chain
@ -175,18 +178,40 @@ func (q *queue) PendingReceipts() int {
// PendingNodeData retrieves the number of node data entries pending for retrieval.
func (q *queue) PendingNodeData() int {
q.lock.RLock()
defer q.lock.RUnlock()
q.stateSchedLock.RLock()
defer q.stateSchedLock.RUnlock()
return q.stateTaskQueue.Size()
if q.stateScheduler != nil {
return q.stateScheduler.Pending()
}
return 0
}
// InFlight retrieves the number of fetch requests currently in flight.
func (q *queue) InFlight() int {
// InFlightBlocks retrieves whether there are block fetch requests currently in
// flight.
func (q *queue) InFlightBlocks() bool {
q.lock.RLock()
defer q.lock.RUnlock()
return len(q.blockPendPool) + len(q.receiptPendPool) + len(q.statePendPool)
return len(q.blockPendPool) > 0
}
// InFlightReceipts retrieves whether there are receipt fetch requests currently
// in flight.
func (q *queue) InFlightReceipts() bool {
q.lock.RLock()
defer q.lock.RUnlock()
return len(q.receiptPendPool) > 0
}
// InFlightNodeData retrieves whether there are node data entry fetch requests
// currently in flight.
func (q *queue) InFlightNodeData() bool {
q.lock.RLock()
defer q.lock.RUnlock()
return len(q.statePendPool)+int(atomic.LoadInt32(&q.stateProcessors)) > 0
}
// Idle returns if the queue is fully idle or has some data still inside. This
@ -199,6 +224,12 @@ func (q *queue) Idle() bool {
pending := len(q.blockPendPool) + len(q.receiptPendPool) + len(q.statePendPool)
cached := len(q.blockDonePool) + len(q.receiptDonePool)
q.stateSchedLock.RLock()
if q.stateScheduler != nil {
queued += q.stateScheduler.Pending()
}
q.stateSchedLock.RUnlock()
return (queued + pending + cached) == 0
}
@ -299,12 +330,9 @@ func (q *queue) Schedule(headers []*types.Header, from uint64) []*types.Header {
}
if q.mode == FastSync && header.Number.Uint64() == q.fastSyncPivot {
// Pivoting point of the fast sync, retrieve the state tries
q.stateSchedLock.Lock()
q.stateScheduler = state.NewStateSync(header.Root, q.stateDatabase)
for _, hash := range q.stateScheduler.Missing(0) {
q.stateTaskPool[hash] = q.stateTaskIndex
q.stateTaskQueue.Push(hash, -float32(q.stateTaskIndex))
q.stateTaskIndex++
}
q.stateSchedLock.Unlock()
}
inserts = append(inserts, header)
q.headerHead = hash
@ -325,9 +353,14 @@ func (q *queue) GetHeadResult() *fetchResult {
if q.resultCache[0].Pending > 0 {
return nil
}
if q.mode == FastSync && q.resultCache[0].Header.Number.Uint64() == q.fastSyncPivot && len(q.stateTaskPool) > 0 {
if q.mode == FastSync && q.resultCache[0].Header.Number.Uint64() == q.fastSyncPivot {
if len(q.stateTaskPool) > 0 {
return nil
}
if q.PendingNodeData() > 0 {
return nil
}
}
return q.resultCache[0]
}
@ -345,9 +378,14 @@ func (q *queue) TakeResults() []*fetchResult {
break
}
// The fast sync pivot block may only be processed after state fetch completes
if q.mode == FastSync && result.Header.Number.Uint64() == q.fastSyncPivot && len(q.stateTaskPool) > 0 {
if q.mode == FastSync && result.Header.Number.Uint64() == q.fastSyncPivot {
if len(q.stateTaskPool) > 0 {
break
}
if q.PendingNodeData() > 0 {
break
}
}
// If we've just inserted the fast sync pivot, stop as the following batch needs different insertion
if q.mode == FastSync && result.Header.Number.Uint64() == q.fastSyncPivot+1 && len(results) > 0 {
break
@ -373,26 +411,34 @@ func (q *queue) TakeResults() []*fetchResult {
// ReserveBlocks reserves a set of block hashes for the given peer, skipping any
// previously failed download.
func (q *queue) ReserveBlocks(p *peer, count int) *fetchRequest {
return q.reserveHashes(p, count, q.hashQueue, q.blockPendPool, len(q.resultCache)-len(q.blockDonePool))
return q.reserveHashes(p, count, q.hashQueue, nil, q.blockPendPool, len(q.resultCache)-len(q.blockDonePool))
}
// ReserveNodeData reserves a set of node data hashes for the given peer, skipping
// any previously failed download.
func (q *queue) ReserveNodeData(p *peer, count int) *fetchRequest {
return q.reserveHashes(p, count, q.stateTaskQueue, q.statePendPool, 0)
// Create a task generator to fetch status-fetch tasks if all schedules ones are done
generator := func(max int) {
q.stateSchedLock.Lock()
defer q.stateSchedLock.Unlock()
for _, hash := range q.stateScheduler.Missing(max) {
q.stateTaskPool[hash] = q.stateTaskIndex
q.stateTaskQueue.Push(hash, -float32(q.stateTaskIndex))
q.stateTaskIndex++
}
}
return q.reserveHashes(p, count, q.stateTaskQueue, generator, q.statePendPool, count)
}
// reserveHashes reserves a set of hashes for the given peer, skipping previously
// failed ones.
func (q *queue) reserveHashes(p *peer, count int, taskQueue *prque.Prque, pendPool map[string]*fetchRequest, maxPending int) *fetchRequest {
func (q *queue) reserveHashes(p *peer, count int, taskQueue *prque.Prque, taskGen func(int), pendPool map[string]*fetchRequest, maxPending int) *fetchRequest {
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 taskQueue.Empty() {
return nil
}
// Short circuit if the peer's already downloading something (sanity check not
// to corrupt state)
if _, ok := pendPool[p.id]; ok {
return nil
}
@ -403,6 +449,13 @@ func (q *queue) reserveHashes(p *peer, count int, taskQueue *prque.Prque, pendPo
allowance -= len(request.Hashes)
}
}
// If there's a task generator, ask it to fill our task queue
if taskGen != nil && taskQueue.Size() < allowance {
taskGen(allowance - taskQueue.Size())
}
if taskQueue.Empty() {
return nil
}
// Retrieve a batch of hashes, skipping previously failed ones
send := make(map[common.Hash]int)
skip := make(map[common.Hash]int)
@ -809,14 +862,14 @@ func (q *queue) deliver(id string, taskPool map[common.Hash]*types.Header, taskQ
}
// DeliverNodeData injects a node state data retrieval response into the queue.
func (q *queue) DeliverNodeData(id string, data [][]byte) (int, int, error) {
func (q *queue) DeliverNodeData(id string, data [][]byte, callback func(error, int)) error {
q.lock.Lock()
defer q.lock.Unlock()
// Short circuit if the data was never requested
request := q.statePendPool[id]
if request == nil {
return 0, 0, errNoFetchesPending
return errNoFetchesPending
}
stateReqTimer.UpdateSince(request.Time)
delete(q.statePendPool, id)
@ -829,7 +882,7 @@ func (q *queue) DeliverNodeData(id string, data [][]byte) (int, int, error) {
}
// Iterate over the downloaded data and verify each of them
errs := make([]error, 0)
processed := 0
process := []trie.SyncResult{}
for _, blob := range data {
// Skip any blocks that were not requested
hash := common.BytesToHash(crypto.Sha3(blob))
@ -837,43 +890,60 @@ func (q *queue) DeliverNodeData(id string, data [][]byte) (int, int, error) {
errs = append(errs, fmt.Errorf("non-requested state data %x", hash))
continue
}
// Inject the next state trie item into the database
if err := q.stateScheduler.Process([]trie.SyncResult{{hash, blob}}); err != nil {
errs = []error{err}
break
}
processed++
// Inject the next state trie item into the processing queue
process = append(process, trie.SyncResult{hash, blob})
delete(request.Hashes, hash)
delete(q.stateTaskPool, hash)
}
// Start the asynchronous node state data injection
atomic.AddInt32(&q.stateProcessors, 1)
go func() {
defer atomic.AddInt32(&q.stateProcessors, -1)
q.deliverNodeData(process, callback)
}()
// Return all failed or missing fetches to the queue
for hash, index := range request.Hashes {
q.stateTaskQueue.Push(hash, float32(index))
}
// Also enqueue any newly required state trie nodes
discovered := 0
if len(q.stateTaskPool) < maxQueuedStates {
for _, hash := range q.stateScheduler.Missing(4 * MaxStateFetch) {
q.stateTaskPool[hash] = q.stateTaskIndex
q.stateTaskQueue.Push(hash, -float32(q.stateTaskIndex))
q.stateTaskIndex++
discovered++
}
}
// If none of the data items were good, it's a stale delivery
switch {
case len(errs) == 0:
return processed, discovered, nil
return nil
case len(errs) == len(request.Hashes):
return processed, discovered, errStaleDelivery
return errStaleDelivery
default:
return processed, discovered, fmt.Errorf("multiple failures: %v", errs)
return fmt.Errorf("multiple failures: %v", errs)
}
}
// deliverNodeData is the asynchronous node data processor that injects a batch
// of sync results into the state scheduler.
func (q *queue) deliverNodeData(results []trie.SyncResult, callback func(error, int)) {
// Process results one by one to permit task fetches in between
for i, result := range results {
q.stateSchedLock.Lock()
if q.stateScheduler == nil {
// Syncing aborted since this async delivery started, bail out
q.stateSchedLock.Unlock()
callback(errNoFetchesPending, i)
return
}
if _, err := q.stateScheduler.Process([]trie.SyncResult{result}); err != nil {
// Processing a state result failed, bail out
q.stateSchedLock.Unlock()
callback(err, i)
return
}
// Item processing succeeded, release the lock (temporarily)
q.stateSchedLock.Unlock()
}
callback(nil, len(results))
}
// Prepare configures the result cache to allow accepting and caching inbound
// fetch results.
func (q *queue) Prepare(offset uint64, mode SyncMode, pivot uint64) {

2
eth/downloader/types.go
View File

@ -52,7 +52,7 @@ type headBlockCommitterFn func(common.Hash) error
type tdRetrievalFn func(common.Hash) *big.Int
// headerChainInsertFn is a callback type to insert a batch of headers into the local chain.
type headerChainInsertFn func([]*types.Header, bool) (int, error)
type headerChainInsertFn func([]*types.Header, int) (int, error)
// blockChainInsertFn is a callback type to insert a batch of blocks into the local chain.
type blockChainInsertFn func(types.Blocks) (int, error)

49
ethdb/memory_database.go
View File

@ -18,6 +18,7 @@ package ethdb
import (
"fmt"
"sync"
"github.com/ethereum/go-ethereum/common"
)
@ -27,28 +28,41 @@ import (
*/
type MemDatabase struct {
db map[string][]byte
lock sync.RWMutex
}
func NewMemDatabase() (*MemDatabase, error) {
db := &MemDatabase{db: make(map[string][]byte)}
return db, nil
return &MemDatabase{
db: make(map[string][]byte),
}, nil
}
func (db *MemDatabase) Put(key []byte, value []byte) error {
db.lock.Lock()
defer db.lock.Unlock()
db.db[string(key)] = common.CopyBytes(value)
return nil
}
func (db *MemDatabase) Set(key []byte, value []byte) {
db.lock.Lock()
defer db.lock.Unlock()
db.Put(key, value)
}
func (db *MemDatabase) Get(key []byte) ([]byte, error) {
db.lock.RLock()
defer db.lock.RUnlock()
return db.db[string(key)], nil
}
func (db *MemDatabase) Keys() [][]byte {
db.lock.RLock()
defer db.lock.RUnlock()
keys := [][]byte{}
for key, _ := range db.db {
keys = append(keys, []byte(key))
@ -65,12 +79,17 @@ func (db *MemDatabase) GetKeys() []*common.Key {
*/
func (db *MemDatabase) Delete(key []byte) error {
delete(db.db, string(key))
db.lock.Lock()
defer db.lock.Unlock()
delete(db.db, string(key))
return nil
}
func (db *MemDatabase) Print() {
db.lock.RLock()
defer db.lock.RUnlock()
for key, val := range db.db {
fmt.Printf("%x(%d): ", key, len(key))
node := common.NewValueFromBytes(val)
@ -83,11 +102,9 @@ func (db *MemDatabase) Close() {
func (db *MemDatabase) LastKnownTD() []byte {
data, _ := db.Get([]byte("LastKnownTotalDifficulty"))
if len(data) == 0 || data == nil {
data = []byte{0x0}
}
return data
}
@ -100,16 +117,26 @@ type kv struct{ k, v []byte }
type memBatch struct {
db *MemDatabase
writes []kv
lock sync.RWMutex
}
func (w *memBatch) Put(key, value []byte) error {
w.writes = append(w.writes, kv{key, common.CopyBytes(value)})
func (b *memBatch) Put(key, value []byte) error {
b.lock.Lock()
defer b.lock.Unlock()
b.writes = append(b.writes, kv{key, common.CopyBytes(value)})
return nil
}
func (w *memBatch) Write() error {
for _, kv := range w.writes {
w.db.db[string(kv.k)] = kv.v
func (b *memBatch) Write() error {
b.lock.RLock()
defer b.lock.RUnlock()
b.db.lock.RLock()
defer b.db.lock.RUnlock()
for _, kv := range b.writes {
b.db.db[string(kv.k)] = kv.v
}
return nil
}

68
trie/sync.go
View File

@ -20,6 +20,7 @@ import (
"fmt"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/ethdb"
"gopkg.in/karalabe/cookiejar.v2/collections/prque"
)
@ -50,15 +51,15 @@ type TrieSyncLeafCallback func(leaf []byte, parent common.Hash) error
// TrieSync is the main state trie synchronisation scheduler, which provides yet
// unknown trie hashes to retrieve, accepts node data associated with said hashes
// and reconstructs the trie steb by step until all is done.
// and reconstructs the trie step by step until all is done.
type TrieSync struct {
database Database // State database for storing all the assembled node data
database ethdb.Database // State database for storing all the assembled node data
requests map[common.Hash]*request // Pending requests pertaining to a key hash
queue *prque.Prque // Priority queue with the pending requests
}
// NewTrieSync creates a new trie data download scheduler.
func NewTrieSync(root common.Hash, database Database, callback TrieSyncLeafCallback) *TrieSync {
func NewTrieSync(root common.Hash, database ethdb.Database, callback TrieSyncLeafCallback) *TrieSync {
ts := &TrieSync{
database: database,
requests: make(map[common.Hash]*request),
@ -70,10 +71,14 @@ func NewTrieSync(root common.Hash, database Database, callback TrieSyncLeafCallb
// AddSubTrie registers a new trie to the sync code, rooted at the designated parent.
func (s *TrieSync) AddSubTrie(root common.Hash, depth int, parent common.Hash, callback TrieSyncLeafCallback) {
// Short circuit if the trie is empty
// Short circuit if the trie is empty or already known
if root == emptyRoot {
return
}
blob, _ := s.database.Get(root.Bytes())
if local, err := decodeNode(blob); local != nil && err == nil {
return
}
// Assemble the new sub-trie sync request
node := node(hashNode(root.Bytes()))
req := &request{
@ -94,6 +99,35 @@ func (s *TrieSync) AddSubTrie(root common.Hash, depth int, parent common.Hash, c
s.schedule(req)
}
// AddRawEntry schedules the direct retrieval of a state entry that should not be
// interpreted as a trie node, but rather accepted and stored into the database
// as is. This method's goal is to support misc state metadata retrievals (e.g.
// contract code).
func (s *TrieSync) AddRawEntry(hash common.Hash, depth int, parent common.Hash) {
// Short circuit if the entry is empty or already known
if hash == emptyState {
return
}
if blob, _ := s.database.Get(hash.Bytes()); blob != nil {
return
}
// Assemble the new sub-trie sync request
req := &request{
hash: hash,
depth: depth,
}
// If this sub-trie has a designated parent, link them together
if parent != (common.Hash{}) {
ancestor := s.requests[parent]
if ancestor == nil {
panic(fmt.Sprintf("raw-entry ancestor not found: %x", parent))
}
ancestor.deps++
req.parents = append(req.parents, ancestor)
}
s.schedule(req)
}
// Missing retrieves the known missing nodes from the trie for retrieval.
func (s *TrieSync) Missing(max int) []common.Hash {
requests := []common.Hash{}
@ -111,6 +145,12 @@ func (s *TrieSync) Process(results []SyncResult) (int, error) {
if request == nil {
return i, fmt.Errorf("not requested: %x", item.Hash)
}
// If the item is a raw entry request, commit directly
if request.object == nil {
request.data = item.Data
s.commit(request, nil)
continue
}
// Decode the node data content and update the request
node, err := decodeNode(item.Data)
if err != nil {
@ -125,7 +165,7 @@ func (s *TrieSync) Process(results []SyncResult) (int, error) {
return i, err
}
if len(requests) == 0 && request.deps == 0 {
s.commit(request)
s.commit(request, nil)
continue
}
request.deps += len(requests)
@ -136,6 +176,11 @@ func (s *TrieSync) Process(results []SyncResult) (int, error) {
return 0, nil
}
// Pending returns the number of state entries currently pending for download.
func (s *TrieSync) Pending() int {
return len(s.requests)
}
// schedule inserts a new state retrieval request into the fetch queue. If there
// is already a pending request for this node, the new request will be discarded
// and only a parent reference added to the old one.
@ -213,9 +258,16 @@ func (s *TrieSync) children(req *request) ([]*request, error) {
// commit finalizes a retrieval request and stores it into the database. If any
// of the referencing parent requests complete due to this commit, they are also
// committed themselves.
func (s *TrieSync) commit(req *request) error {
func (s *TrieSync) commit(req *request, batch ethdb.Batch) (err error) {
// Create a new batch if none was specified
if batch == nil {
batch = s.database.NewBatch()
defer func() {
err = batch.Write()
}()
}
// Write the node content to disk
if err := s.database.Put(req.hash[:], req.data); err != nil {
if err := batch.Put(req.hash[:], req.data); err != nil {
return err
}
delete(s.requests, req.hash)
@ -224,7 +276,7 @@ func (s *TrieSync) commit(req *request) error {
for _, parent := range req.parents {
parent.deps--
if parent.deps == 0 {
if err := s.commit(parent); err != nil {
if err := s.commit(parent, batch); err != nil {
return err
}
}

5
trie/trie.go
View File

@ -24,6 +24,7 @@ import (
"hash"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/crypto/sha3"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
@ -35,8 +36,12 @@ const defaultCacheCapacity = 800
var (
// The global cache stores decoded trie nodes by hash as they get loaded.
globalCache = newARC(defaultCacheCapacity)
// This is the known root hash of an empty trie.
emptyRoot = common.HexToHash("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421")
// This is the known hash of an empty state trie entry.
emptyState = crypto.Sha3Hash(nil)
)
var ErrMissingRoot = errors.New("missing root node")