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eth, rpc: standardize the chain sync progress counters

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This commit is contained in:
Péter Szilágyi 2015-09-09 19:02:54 +03:00
parent 071e2cd08e
commit 0a7d059b6a
7 changed files with 496 additions and 68 deletions
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186
eth/downloader/downloader.go
View File

@ -130,10 +130,9 @@ type Downloader struct {
interrupt int32 // Atomic boolean to signal termination
// Statistics
importStart time.Time // Instance when the last blocks were taken from the cache
importQueue []*Block // Previously taken blocks to check import progress
importDone int // Number of taken blocks already imported from the last batch
importLock sync.Mutex
syncStatsOrigin uint64 // Origin block number where syncing started at
syncStatsHeight uint64 // Highest block number known when syncing started
syncStatsLock sync.RWMutex // Lock protecting the sync stats fields
// Callbacks
hasBlock hashCheckFn // Checks if a block is present in the chain
@ -161,6 +160,7 @@ type Downloader struct {
cancelLock sync.RWMutex // Lock to protect the cancel channel in delivers
// Testing hooks
syncInitHook func(uint64, uint64) // Method to call upon initiating a new sync run
bodyFetchHook func([]*types.Header) // Method to call upon starting a block body fetch
chainInsertHook func([]*Block) // Method to call upon inserting a chain of blocks (possibly in multiple invocations)
}
@ -192,27 +192,14 @@ func New(mux *event.TypeMux, hasBlock hashCheckFn, getBlock blockRetrievalFn, he
}
}
// Stats retrieves the current status of the downloader.
func (d *Downloader) Stats() (pending int, cached int, importing int, estimate time.Duration) {
// Fetch the download status
pending, cached = d.queue.Size()
// Boundaries retrieves the synchronisation boundaries, specifically the origin
// block where synchronisation started at (may have failed/suspended) and the
// latest known block which the synchonisation targets.
func (d *Downloader) Boundaries() (uint64, uint64) {
d.syncStatsLock.RLock()
defer d.syncStatsLock.RUnlock()
// Figure out the import progress
d.importLock.Lock()
defer d.importLock.Unlock()
for len(d.importQueue) > 0 && d.hasBlock(d.importQueue[0].RawBlock.Hash()) {
d.importQueue = d.importQueue[1:]
d.importDone++
}
importing = len(d.importQueue)
// Make an estimate on the total sync
estimate = 0
if d.importDone > 0 {
estimate = time.Since(d.importStart) / time.Duration(d.importDone) * time.Duration(pending+cached+importing)
}
return
return d.syncStatsOrigin, d.syncStatsHeight
}
// Synchronising returns whether the downloader is currently retrieving blocks.
@ -333,14 +320,29 @@ func (d *Downloader) syncWithPeer(p *peer, hash common.Hash, td *big.Int) (err e
switch {
case p.version == eth61:
// Old eth/61, use forward, concurrent hash and block retrieval algorithm
number, err := d.findAncestor61(p)
// Look up the sync boundaries: the common ancestor and the target block
latest, err := d.fetchHeight61(p)
if err != nil {
return err
}
origin, err := d.findAncestor61(p)
if err != nil {
return err
}
d.syncStatsLock.Lock()
if d.syncStatsHeight <= origin || d.syncStatsOrigin > origin {
d.syncStatsOrigin = origin
}
d.syncStatsHeight = latest
d.syncStatsLock.Unlock()
// Initiate the sync using a concurrent hash and block retrieval algorithm
if d.syncInitHook != nil {
d.syncInitHook(origin, latest)
}
errc := make(chan error, 2)
go func() { errc <- d.fetchHashes61(p, td, number+1) }()
go func() { errc <- d.fetchBlocks61(number + 1) }()
go func() { errc <- d.fetchHashes61(p, td, origin+1) }()
go func() { errc <- d.fetchBlocks61(origin + 1) }()
// If any fetcher fails, cancel the other
if err := <-errc; err != nil {
@ -351,14 +353,29 @@ func (d *Downloader) syncWithPeer(p *peer, hash common.Hash, td *big.Int) (err e
return <-errc
case p.version >= eth62:
// New eth/62, use forward, concurrent header and block body retrieval algorithm
number, err := d.findAncestor(p)
// Look up the sync boundaries: the common ancestor and the target block
latest, err := d.fetchHeight(p)
if err != nil {
return err
}
origin, err := d.findAncestor(p)
if err != nil {
return err
}
d.syncStatsLock.Lock()
if d.syncStatsHeight <= origin || d.syncStatsOrigin > origin {
d.syncStatsOrigin = origin
}
d.syncStatsHeight = latest
d.syncStatsLock.Unlock()
// Initiate the sync using a concurrent hash and block retrieval algorithm
if d.syncInitHook != nil {
d.syncInitHook(origin, latest)
}
errc := make(chan error, 2)
go func() { errc <- d.fetchHeaders(p, td, number+1) }()
go func() { errc <- d.fetchBodies(number + 1) }()
go func() { errc <- d.fetchHeaders(p, td, origin+1) }()
go func() { errc <- d.fetchBodies(origin + 1) }()
// If any fetcher fails, cancel the other
if err := <-errc; err != nil {
@ -401,6 +418,50 @@ func (d *Downloader) Terminate() {
d.cancel()
}
// fetchHeight61 retrieves the head block of the remote peer to aid in estimating
// the total time a pending synchronisation would take.
func (d *Downloader) fetchHeight61(p *peer) (uint64, error) {
glog.V(logger.Debug).Infof("%v: retrieving remote chain height", p)
// Request the advertised remote head block and wait for the response
go p.getBlocks([]common.Hash{p.head})
timeout := time.After(blockSoftTTL)
for {
select {
case <-d.cancelCh:
return 0, errCancelBlockFetch
case <-d.headerCh:
// Out of bounds eth/62 block headers received, ignore them
case <-d.bodyCh:
// Out of bounds eth/62 block bodies received, ignore them
case <-d.hashCh:
// Out of bounds hashes received, ignore them
case blockPack := <-d.blockCh:
// Discard anything not from the origin peer
if blockPack.peerId != p.id {
glog.V(logger.Debug).Infof("Received blocks from incorrect peer(%s)", blockPack.peerId)
break
}
// Make sure the peer actually gave something valid
blocks := blockPack.blocks
if len(blocks) != 1 {
glog.V(logger.Debug).Infof("%v: invalid number of head blocks: %d != 1", p, len(blocks))
return 0, errBadPeer
}
return blocks[0].NumberU64(), nil
case <-timeout:
glog.V(logger.Debug).Infof("%v: head block timeout", p)
return 0, errTimeout
}
}
}
// findAncestor61 tries to locate the common ancestor block of the local chain and
// a remote peers blockchain. In the general case when our node was in sync and
// on the correct chain, checking the top N blocks should already get us a match.
@ -776,6 +837,50 @@ func (d *Downloader) fetchBlocks61(from uint64) error {
}
}
// fetchHeight retrieves the head header of the remote peer to aid in estimating
// the total time a pending synchronisation would take.
func (d *Downloader) fetchHeight(p *peer) (uint64, error) {
glog.V(logger.Debug).Infof("%v: retrieving remote chain height", p)
// Request the advertised remote head block and wait for the response
go p.getRelHeaders(p.head, 1, 0, false)
timeout := time.After(headerTTL)
for {
select {
case <-d.cancelCh:
return 0, errCancelBlockFetch
case headerPack := <-d.headerCh:
// Discard anything not from the origin peer
if headerPack.peerId != p.id {
glog.V(logger.Debug).Infof("Received headers from incorrect peer(%s)", headerPack.peerId)
break
}
// Make sure the peer actually gave something valid
headers := headerPack.headers
if len(headers) != 1 {
glog.V(logger.Debug).Infof("%v: invalid number of head headers: %d != 1", p, len(headers))
return 0, errBadPeer
}
return headers[0].Number.Uint64(), nil
case <-d.bodyCh:
// Out of bounds block bodies received, ignore them
case <-d.hashCh:
// Out of bounds eth/61 hashes received, ignore them
case <-d.blockCh:
// Out of bounds eth/61 blocks received, ignore them
case <-timeout:
glog.V(logger.Debug).Infof("%v: head header timeout", p)
return 0, errTimeout
}
}
}
// findAncestor tries to locate the common ancestor block of the local chain and
// a remote peers blockchain. In the general case when our node was in sync and
// on the correct chain, checking the top N blocks should already get us a match.
@ -1203,16 +1308,10 @@ func (d *Downloader) process() {
d.process()
}
}()
// Release the lock upon exit (note, before checking for reentry!), and set
// Release the lock upon exit (note, before checking for reentry!)
// the import statistics to zero.
defer func() {
d.importLock.Lock()
d.importQueue = nil
d.importDone = 0
d.importLock.Unlock()
defer atomic.StoreInt32(&d.processing, 0)
atomic.StoreInt32(&d.processing, 0)
}()
// Repeat the processing as long as there are blocks to import
for {
// Fetch the next batch of blocks
@ -1223,13 +1322,6 @@ func (d *Downloader) process() {
if d.chainInsertHook != nil {
d.chainInsertHook(blocks)
}
// Reset the import statistics
d.importLock.Lock()
d.importStart = time.Now()
d.importQueue = blocks
d.importDone = 0
d.importLock.Unlock()
// Actually import the blocks
glog.V(logger.Debug).Infof("Inserting chain with %d blocks (#%v - #%v)\n", len(blocks), blocks[0].RawBlock.Number(), blocks[len(blocks)-1].RawBlock.Number())
for len(blocks) != 0 {

341
eth/downloader/downloader_test.go
View File

@ -20,6 +20,7 @@ import (
"errors"
"fmt"
"math/big"
"sync"
"sync/atomic"
"testing"
"time"
@ -99,6 +100,8 @@ type downloadTester struct {
peerHashes map[string][]common.Hash // Hash chain belonging to different test peers
peerBlocks map[string]map[common.Hash]*types.Block // Blocks belonging to different test peers
peerChainTds map[string]map[common.Hash]*big.Int // Total difficulties of the blocks in the peer chains
lock sync.RWMutex
}
// newTester creates a new downloader test mocker.
@ -118,8 +121,8 @@ func newTester() *downloadTester {
// sync starts synchronizing with a remote peer, blocking until it completes.
func (dl *downloadTester) sync(id string, td *big.Int) error {
dl.lock.RLock()
hash := dl.peerHashes[id][0]
// If no particular TD was requested, load from the peer's blockchain
if td == nil {
td = big.NewInt(1)
@ -127,14 +130,19 @@ func (dl *downloadTester) sync(id string, td *big.Int) error {
td = diff
}
}
err := dl.downloader.synchronise(id, hash, td)
dl.lock.RUnlock()
err := dl.downloader.synchronise(id, hash, td)
for {
// If the queue is empty and processing stopped, break
hashes, blocks := dl.downloader.queue.Size()
if hashes+blocks == 0 && atomic.LoadInt32(&dl.downloader.processing) == 0 {
break
}
// If there are queued blocks, but the head is missing, it's a stale leftover
if hashes+blocks > 0 && atomic.LoadInt32(&dl.downloader.processing) == 0 && dl.downloader.queue.GetHeadBlock() == nil {
break
}
// Otherwise sleep a bit and retry
time.Sleep(time.Millisecond)
}
@ -143,26 +151,41 @@ func (dl *downloadTester) sync(id string, td *big.Int) error {
// hasBlock checks if a block is pres ent in the testers canonical chain.
func (dl *downloadTester) hasBlock(hash common.Hash) bool {
dl.lock.RLock()
defer dl.lock.RUnlock()
return dl.getBlock(hash) != nil
}
// getBlock retrieves a block from the testers canonical chain.
func (dl *downloadTester) getBlock(hash common.Hash) *types.Block {
dl.lock.RLock()
defer dl.lock.RUnlock()
return dl.ownBlocks[hash]
}
// headBlock retrieves the current head block from the canonical chain.
func (dl *downloadTester) headBlock() *types.Block {
dl.lock.RLock()
defer dl.lock.RUnlock()
return dl.getBlock(dl.ownHashes[len(dl.ownHashes)-1])
}
// getTd retrieves the block's total difficulty from the canonical chain.
func (dl *downloadTester) getTd(hash common.Hash) *big.Int {
dl.lock.RLock()
defer dl.lock.RUnlock()
return dl.ownChainTd[hash]
}
// insertChain injects a new batch of blocks into the simulated chain.
func (dl *downloadTester) insertChain(blocks types.Blocks) (int, error) {
dl.lock.Lock()
defer dl.lock.Unlock()
for i, block := range blocks {
if _, ok := dl.ownBlocks[block.ParentHash()]; !ok {
return i, errors.New("unknown parent")
@ -183,9 +206,12 @@ func (dl *downloadTester) newPeer(id string, version int, hashes []common.Hash,
// specific delay time on processing the network packets sent to it, simulating
// potentially slow network IO.
func (dl *downloadTester) newSlowPeer(id string, version int, hashes []common.Hash, blocks map[common.Hash]*types.Block, delay time.Duration) error {
dl.lock.Lock()
defer dl.lock.Unlock()
err := dl.downloader.RegisterPeer(id, version, hashes[0],
dl.peerGetRelHashesFn(id, delay), dl.peerGetAbsHashesFn(id, delay), dl.peerGetBlocksFn(id, delay),
nil, dl.peerGetAbsHeadersFn(id, delay), dl.peerGetBodiesFn(id, delay))
dl.peerGetRelHeadersFn(id, delay), dl.peerGetAbsHeadersFn(id, delay), dl.peerGetBodiesFn(id, delay))
if err == nil {
// Assign the owned hashes and blocks to the peer (deep copy)
dl.peerHashes[id] = make([]common.Hash, len(hashes))
@ -207,6 +233,9 @@ func (dl *downloadTester) newSlowPeer(id string, version int, hashes []common.Ha
// dropPeer simulates a hard peer removal from the connection pool.
func (dl *downloadTester) dropPeer(id string) {
dl.lock.Lock()
defer dl.lock.Unlock()
delete(dl.peerHashes, id)
delete(dl.peerBlocks, id)
delete(dl.peerChainTds, id)
@ -221,6 +250,9 @@ func (dl *downloadTester) peerGetRelHashesFn(id string, delay time.Duration) fun
return func(head common.Hash) error {
time.Sleep(delay)
dl.lock.RLock()
defer dl.lock.RUnlock()
// Gather the next batch of hashes
hashes := dl.peerHashes[id]
result := make([]common.Hash, 0, MaxHashFetch)
@ -250,6 +282,9 @@ func (dl *downloadTester) peerGetAbsHashesFn(id string, delay time.Duration) fun
return func(head uint64, count int) error {
time.Sleep(delay)
dl.lock.RLock()
defer dl.lock.RUnlock()
// Gather the next batch of hashes
hashes := dl.peerHashes[id]
result := make([]common.Hash, 0, count)
@ -271,6 +306,10 @@ func (dl *downloadTester) peerGetAbsHashesFn(id string, delay time.Duration) fun
func (dl *downloadTester) peerGetBlocksFn(id string, delay time.Duration) func([]common.Hash) error {
return func(hashes []common.Hash) error {
time.Sleep(delay)
dl.lock.RLock()
defer dl.lock.RUnlock()
blocks := dl.peerBlocks[id]
result := make([]*types.Block, 0, len(hashes))
for _, hash := range hashes {
@ -284,6 +323,27 @@ func (dl *downloadTester) peerGetBlocksFn(id string, delay time.Duration) func([
}
}
// peerGetRelHeadersFn constructs a GetBlockHeaders function based on a hashed
// origin; associated with a particular peer in the download tester. The returned
// function can be used to retrieve batches of headers from the particular peer.
func (dl *downloadTester) peerGetRelHeadersFn(id string, delay time.Duration) func(common.Hash, int, int, bool) error {
return func(origin common.Hash, amount int, skip int, reverse bool) error {
// Find the canonical number of the hash
dl.lock.RLock()
number := uint64(0)
for num, hash := range dl.peerHashes[id] {
if hash == origin {
number = uint64(len(dl.peerHashes[id]) - num - 1)
break
}
}
dl.lock.RUnlock()
// Use the absolute header fetcher to satisfy the query
return dl.peerGetAbsHeadersFn(id, delay)(number, amount, skip, reverse)
}
}
// peerGetAbsHeadersFn constructs a GetBlockHeaders function based on a numbered
// origin; associated with a particular peer in the download tester. The returned
// function can be used to retrieve batches of headers from the particular peer.
@ -291,6 +351,9 @@ func (dl *downloadTester) peerGetAbsHeadersFn(id string, delay time.Duration) fu
return func(origin uint64, amount int, skip int, reverse bool) error {
time.Sleep(delay)
dl.lock.RLock()
defer dl.lock.RUnlock()
// Gather the next batch of hashes
hashes := dl.peerHashes[id]
blocks := dl.peerBlocks[id]
@ -315,6 +378,10 @@ func (dl *downloadTester) peerGetAbsHeadersFn(id string, delay time.Duration) fu
func (dl *downloadTester) peerGetBodiesFn(id string, delay time.Duration) func([]common.Hash) error {
return func(hashes []common.Hash) error {
time.Sleep(delay)
dl.lock.RLock()
defer dl.lock.RUnlock()
blocks := dl.peerBlocks[id]
transactions := make([][]*types.Transaction, 0, len(hashes))
@ -384,13 +451,23 @@ func testThrottling(t *testing.T, protocol int) {
errc <- tester.sync("peer", nil)
}()
// Iteratively take some blocks, always checking the retrieval count
for len(tester.ownBlocks) < targetBlocks+1 {
for {
// Check the retrieval count synchronously (! reason for this ugly block)
tester.lock.RLock()
retrieved := len(tester.ownBlocks)
tester.lock.RUnlock()
if retrieved >= targetBlocks+1 {
break
}
// Wait a bit for sync to throttle itself
var cached int
for start := time.Now(); time.Since(start) < time.Second; {
time.Sleep(25 * time.Millisecond)
tester.downloader.queue.lock.RLock()
cached = len(tester.downloader.queue.blockPool)
tester.downloader.queue.lock.RUnlock()
if cached == blockCacheLimit || len(tester.ownBlocks)+cached+int(atomic.LoadUint32(&blocked)) == targetBlocks+1 {
break
}
@ -727,3 +804,259 @@ func testBlockBodyAttackerDropping(t *testing.T, protocol int) {
}
}
}
// Tests that synchronisation boundaries (origin block number and highest block
// number) is tracked and updated correctly.
func TestSyncBoundaries61(t *testing.T) { testSyncBoundaries(t, 61) }
func TestSyncBoundaries62(t *testing.T) { testSyncBoundaries(t, 62) }
func TestSyncBoundaries63(t *testing.T) { testSyncBoundaries(t, 63) }
func TestSyncBoundaries64(t *testing.T) { testSyncBoundaries(t, 64) }
func testSyncBoundaries(t *testing.T, protocol int) {
// Create a small enough block chain to download
targetBlocks := blockCacheLimit - 15
hashes, blocks := makeChain(targetBlocks, 0, genesis)
// Set a sync init hook to catch boundary changes
starting := make(chan struct{})
progress := make(chan struct{})
tester := newTester()
tester.downloader.syncInitHook = func(origin, latest uint64) {
starting <- struct{}{}
<-progress
}
// Retrieve the sync boundaries and ensure they are zero (pristine sync)
if origin, latest := tester.downloader.Boundaries(); origin != 0 || latest != 0 {
t.Fatalf("Pristine boundary mismatch: have %v/%v, want %v/%v", origin, latest, 0, 0)
}
// Synchronise half the blocks and check initial boundaries
tester.newPeer("peer-half", protocol, hashes[targetBlocks/2:], blocks)
pending := new(sync.WaitGroup)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("peer-half", nil); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
}()
<-starting
if origin, latest := tester.downloader.Boundaries(); origin != 0 || latest != uint64(targetBlocks/2+1) {
t.Fatalf("Initial boundary mismatch: have %v/%v, want %v/%v", origin, latest, 0, targetBlocks/2+1)
}
progress <- struct{}{}
pending.Wait()
// Synchronise all the blocks and check continuation boundaries
tester.newPeer("peer-full", protocol, hashes, blocks)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("peer-full", nil); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
}()
<-starting
if origin, latest := tester.downloader.Boundaries(); origin != uint64(targetBlocks/2+1) || latest != uint64(targetBlocks) {
t.Fatalf("Completing boundary mismatch: have %v/%v, want %v/%v", origin, latest, targetBlocks/2+1, targetBlocks)
}
progress <- struct{}{}
pending.Wait()
}
// Tests that synchronisation boundaries (origin block number and highest block
// number) is tracked and updated correctly in case of a fork (or manual head
// revertal).
func TestForkedSyncBoundaries61(t *testing.T) { testForkedSyncBoundaries(t, 61) }
func TestForkedSyncBoundaries62(t *testing.T) { testForkedSyncBoundaries(t, 62) }
func TestForkedSyncBoundaries63(t *testing.T) { testForkedSyncBoundaries(t, 63) }
func TestForkedSyncBoundaries64(t *testing.T) { testForkedSyncBoundaries(t, 64) }
func testForkedSyncBoundaries(t *testing.T, protocol int) {
// Create a forked chain to simulate origin revertal
common, fork := MaxHashFetch, 2*MaxHashFetch
hashesA, hashesB, blocksA, blocksB := makeChainFork(common+fork, fork, genesis)
// Set a sync init hook to catch boundary changes
starting := make(chan struct{})
progress := make(chan struct{})
tester := newTester()
tester.downloader.syncInitHook = func(origin, latest uint64) {
starting <- struct{}{}
<-progress
}
// Retrieve the sync boundaries and ensure they are zero (pristine sync)
if origin, latest := tester.downloader.Boundaries(); origin != 0 || latest != 0 {
t.Fatalf("Pristine boundary mismatch: have %v/%v, want %v/%v", origin, latest, 0, 0)
}
// Synchronise with one of the forks and check boundaries
tester.newPeer("fork A", protocol, hashesA, blocksA)
pending := new(sync.WaitGroup)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("fork A", nil); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
}()
<-starting
if origin, latest := tester.downloader.Boundaries(); origin != 0 || latest != uint64(len(hashesA)-1) {
t.Fatalf("Initial boundary mismatch: have %v/%v, want %v/%v", origin, latest, 0, len(hashesA)-1)
}
progress <- struct{}{}
pending.Wait()
// Simulate a successful sync above the fork
tester.downloader.syncStatsOrigin = tester.downloader.syncStatsHeight
// Synchronise with the second fork and check boundary resets
tester.newPeer("fork B", protocol, hashesB, blocksB)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("fork B", nil); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
}()
<-starting
if origin, latest := tester.downloader.Boundaries(); origin != uint64(common) || latest != uint64(len(hashesB)-1) {
t.Fatalf("Forking boundary mismatch: have %v/%v, want %v/%v", origin, latest, common, len(hashesB)-1)
}
progress <- struct{}{}
pending.Wait()
}
// Tests that if synchronisation is aborted due to some failure, then the boundary
// origin is not updated in the next sync cycle, as it should be considered the
// continuation of the previous sync and not a new instance.
func TestFailedSyncBoundaries61(t *testing.T) { testFailedSyncBoundaries(t, 61) }
func TestFailedSyncBoundaries62(t *testing.T) { testFailedSyncBoundaries(t, 62) }
func TestFailedSyncBoundaries63(t *testing.T) { testFailedSyncBoundaries(t, 63) }
func TestFailedSyncBoundaries64(t *testing.T) { testFailedSyncBoundaries(t, 64) }
func testFailedSyncBoundaries(t *testing.T, protocol int) {
// Create a small enough block chain to download
targetBlocks := blockCacheLimit - 15
hashes, blocks := makeChain(targetBlocks, 0, genesis)
// Set a sync init hook to catch boundary changes
starting := make(chan struct{})
progress := make(chan struct{})
tester := newTester()
tester.downloader.syncInitHook = func(origin, latest uint64) {
starting <- struct{}{}
<-progress
}
// Retrieve the sync boundaries and ensure they are zero (pristine sync)
if origin, latest := tester.downloader.Boundaries(); origin != 0 || latest != 0 {
t.Fatalf("Pristine boundary mismatch: have %v/%v, want %v/%v", origin, latest, 0, 0)
}
// Attempt a full sync with a faulty peer
tester.newPeer("faulty", protocol, hashes, blocks)
missing := targetBlocks / 2
delete(tester.peerBlocks["faulty"], hashes[missing])
pending := new(sync.WaitGroup)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("faulty", nil); err == nil {
t.Fatalf("succeeded faulty synchronisation")
}
}()
<-starting
if origin, latest := tester.downloader.Boundaries(); origin != 0 || latest != uint64(targetBlocks) {
t.Fatalf("Initial boundary mismatch: have %v/%v, want %v/%v", origin, latest, 0, targetBlocks)
}
progress <- struct{}{}
pending.Wait()
// Synchronise with a good peer and check that the boundary origin remind the same after a failure
tester.newPeer("valid", protocol, hashes, blocks)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("valid", nil); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
}()
<-starting
if origin, latest := tester.downloader.Boundaries(); origin != 0 || latest != uint64(targetBlocks) {
t.Fatalf("Completing boundary mismatch: have %v/%v, want %v/%v", origin, latest, 0, targetBlocks)
}
progress <- struct{}{}
pending.Wait()
}
// Tests that if an attacker fakes a chain height, after the attack is detected,
// the boundary height is successfully reduced at the next sync invocation.
func TestFakedSyncBoundaries61(t *testing.T) { testFakedSyncBoundaries(t, 61) }
func TestFakedSyncBoundaries62(t *testing.T) { testFakedSyncBoundaries(t, 62) }
func TestFakedSyncBoundaries63(t *testing.T) { testFakedSyncBoundaries(t, 63) }
func TestFakedSyncBoundaries64(t *testing.T) { testFakedSyncBoundaries(t, 64) }
func testFakedSyncBoundaries(t *testing.T, protocol int) {
// Create a small block chain
targetBlocks := blockCacheLimit - 15
hashes, blocks := makeChain(targetBlocks+3, 0, genesis)
// Set a sync init hook to catch boundary changes
starting := make(chan struct{})
progress := make(chan struct{})
tester := newTester()
tester.downloader.syncInitHook = func(origin, latest uint64) {
starting <- struct{}{}
<-progress
}
// Retrieve the sync boundaries and ensure they are zero (pristine sync)
if origin, latest := tester.downloader.Boundaries(); origin != 0 || latest != 0 {
t.Fatalf("Pristine boundary mismatch: have %v/%v, want %v/%v", origin, latest, 0, 0)
}
// Create and sync with an attacker that promises a higher chain than available
tester.newPeer("attack", protocol, hashes, blocks)
for i := 1; i < 3; i++ {
delete(tester.peerBlocks["attack"], hashes[i])
}
pending := new(sync.WaitGroup)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("attack", nil); err == nil {
t.Fatalf("succeeded attacker synchronisation")
}
}()
<-starting
if origin, latest := tester.downloader.Boundaries(); origin != 0 || latest != uint64(targetBlocks+3) {
t.Fatalf("Initial boundary mismatch: have %v/%v, want %v/%v", origin, latest, 0, targetBlocks+3)
}
progress <- struct{}{}
pending.Wait()
// Synchronise with a good peer and check that the boundary height has been reduced to the true value
tester.newPeer("valid", protocol, hashes[3:], blocks)
pending.Add(1)
go func() {
defer pending.Done()
if err := tester.sync("valid", nil); err != nil {
t.Fatalf("failed to synchronise blocks: %v", err)
}
}()
<-starting
if origin, latest := tester.downloader.Boundaries(); origin != 0 || latest != uint64(targetBlocks) {
t.Fatalf("Initial boundary mismatch: have %v/%v, want %v/%v", origin, latest, 0, targetBlocks)
}
progress <- struct{}{}
pending.Wait()
}

12
rpc/api/admin.go
View File

@ -55,7 +55,6 @@ var (
"admin_exportChain": (*adminApi).ExportChain,
"admin_importChain": (*adminApi).ImportChain,
"admin_verbosity": (*adminApi).Verbosity,
"admin_chainSyncStatus": (*adminApi).ChainSyncStatus,
"admin_setSolc": (*adminApi).SetSolc,
"admin_datadir": (*adminApi).DataDir,
"admin_startRPC": (*adminApi).StartRPC,
@ -232,17 +231,6 @@ func (self *adminApi) Verbosity(req *shared.Request) (interface{}, error) {
return true, nil
}
func (self *adminApi) ChainSyncStatus(req *shared.Request) (interface{}, error) {
pending, cached, importing, estimate := self.ethereum.Downloader().Stats()
return map[string]interface{}{
"blocksAvailable": pending,
"blocksWaitingForImport": cached,
"importing": importing,
"estimate": estimate.String(),
}, nil
}
func (self *adminApi) SetSolc(req *shared.Request) (interface{}, error) {
args := new(SetSolcArgs)
if err := self.coder.Decode(req.Params, &args); err != nil {

4
rpc/api/admin_js.go
View File

@ -143,10 +143,6 @@ web3._extend({
new web3._extend.Property({
name: 'datadir',
getter: 'admin_datadir'
}),
new web3._extend.Property({
name: 'chainSyncStatus',
getter: 'admin_chainSyncStatus'
})
]
});

15
rpc/api/eth.go
View File

@ -55,6 +55,7 @@ var (
"eth_protocolVersion": (*ethApi).ProtocolVersion,
"eth_coinbase": (*ethApi).Coinbase,
"eth_mining": (*ethApi).IsMining,
"eth_syncing": (*ethApi).IsSyncing,
"eth_gasPrice": (*ethApi).GasPrice,
"eth_getStorage": (*ethApi).GetStorage,
"eth_storageAt": (*ethApi).GetStorage,
@ -166,6 +167,20 @@ func (self *ethApi) IsMining(req *shared.Request) (interface{}, error) {
return self.xeth.IsMining(), nil
}
func (self *ethApi) IsSyncing(req *shared.Request) (interface{}, error) {
current := self.ethereum.ChainManager().CurrentBlock().NumberU64()
origin, height := self.ethereum.Downloader().Boundaries()
if current < height {
return map[string]interface{}{
"startingBlock": origin,
"currentBlock": current,
"highestBlock": height,
}, nil
}
return false, nil
}
func (self *ethApi) GasPrice(req *shared.Request) (interface{}, error) {
return newHexNum(self.xeth.DefaultGasPrice().Bytes()), nil
}

4
rpc/api/eth_js.go
View File

@ -42,6 +42,10 @@ web3._extend({
new web3._extend.Property({
name: 'pendingTransactions',
getter: 'eth_pendingTransactions'
}),
new web3._extend.Property({
name: 'syncing',
getter: 'eth_syncing'
})
]
});

2
rpc/api/utils.go
View File

@ -32,7 +32,6 @@ var (
AutoCompletion = map[string][]string{
"admin": []string{
"addPeer",
"chainSyncStatus",
"datadir",
"exportChain",
"getContractInfo",
@ -99,6 +98,7 @@ var (
"sendRawTransaction",
"sendTransaction",
"sign",
"syncing",
},
"miner": []string{
"hashrate",