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core, eth, trie: prepare trie sync for path based operation

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This commit is contained in:
Péter Szilágyi 2020-08-28 10:50:37 +03:00
parent 5883afb3ef
commit eeaf191633
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GPG Key ID: E9AE538CEDF8293D
6 changed files with 480 additions and 105 deletions
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127
core/state/sync_test.go
View File

@ -26,6 +26,7 @@ import (
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/ethdb/memorydb"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/trie"
)
@ -44,7 +45,7 @@ func makeTestState() (Database, common.Hash, []*testAccount) {
state, _ := New(common.Hash{}, db, nil)
// Fill it with some arbitrary data
accounts := []*testAccount{}
var accounts []*testAccount
for i := byte(0); i < 96; i++ {
obj := state.GetOrNewStateObject(common.BytesToAddress([]byte{i}))
acc := &testAccount{address: common.BytesToAddress([]byte{i})}
@ -59,6 +60,11 @@ func makeTestState() (Database, common.Hash, []*testAccount) {
obj.SetCode(crypto.Keccak256Hash([]byte{i, i, i, i, i}), []byte{i, i, i, i, i})
acc.code = []byte{i, i, i, i, i}
}
if i%5 == 0 {
for j := byte(0); j < 5; j++ {
obj.SetState(db, crypto.Keccak256Hash([]byte{i, i, i, i, i, j, j}), crypto.Keccak256Hash([]byte{i, i, i, i, i, j, j}))
}
}
state.updateStateObject(obj)
accounts = append(accounts, acc)
}
@ -126,44 +132,94 @@ func checkStateConsistency(db ethdb.Database, root common.Hash) error {
// Tests that an empty state is not scheduled for syncing.
func TestEmptyStateSync(t *testing.T) {
empty := common.HexToHash("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421")
if req := NewStateSync(empty, rawdb.NewMemoryDatabase(), trie.NewSyncBloom(1, memorydb.New())).Missing(1); len(req) != 0 {
t.Errorf("content requested for empty state: %v", req)
sync := NewStateSync(empty, rawdb.NewMemoryDatabase(), trie.NewSyncBloom(1, memorydb.New()))
if nodes, paths, codes := sync.Missing(1); len(nodes) != 0 || len(paths) != 0 || len(codes) != 0 {
t.Errorf(" content requested for empty state: %v, %v, %v", nodes, paths, codes)
}
}
// Tests that given a root hash, a state can sync iteratively on a single thread,
// requesting retrieval tasks and returning all of them in one go.
func TestIterativeStateSyncIndividual(t *testing.T) { testIterativeStateSync(t, 1, false) }
func TestIterativeStateSyncBatched(t *testing.T) { testIterativeStateSync(t, 100, false) }
func TestIterativeStateSyncIndividualFromDisk(t *testing.T) { testIterativeStateSync(t, 1, true) }
func TestIterativeStateSyncBatchedFromDisk(t *testing.T) { testIterativeStateSync(t, 100, true) }
func TestIterativeStateSyncIndividual(t *testing.T) {
testIterativeStateSync(t, 1, false, false)
}
func TestIterativeStateSyncBatched(t *testing.T) {
testIterativeStateSync(t, 100, false, false)
}
func TestIterativeStateSyncIndividualFromDisk(t *testing.T) {
testIterativeStateSync(t, 1, true, false)
}
func TestIterativeStateSyncBatchedFromDisk(t *testing.T) {
testIterativeStateSync(t, 100, true, false)
}
func TestIterativeStateSyncIndividualByPath(t *testing.T) {
testIterativeStateSync(t, 1, false, true)
}
func TestIterativeStateSyncBatchedByPath(t *testing.T) {
testIterativeStateSync(t, 100, false, true)
}
func testIterativeStateSync(t *testing.T, count int, commit bool) {
func testIterativeStateSync(t *testing.T, count int, commit bool, bypath bool) {
// Create a random state to copy
srcDb, srcRoot, srcAccounts := makeTestState()
if commit {
srcDb.TrieDB().Commit(srcRoot, false, nil)
}
srcTrie, _ := trie.New(srcRoot, srcDb.TrieDB())
// Create a destination state and sync with the scheduler
dstDb := rawdb.NewMemoryDatabase()
sched := NewStateSync(srcRoot, dstDb, trie.NewSyncBloom(1, dstDb))
queue := append([]common.Hash{}, sched.Missing(count)...)
for len(queue) > 0 {
results := make([]trie.SyncResult, len(queue))
for i, hash := range queue {
nodes, paths, codes := sched.Missing(count)
var (
hashQueue []common.Hash
pathQueue []trie.SyncPath
)
if !bypath {
hashQueue = append(append(hashQueue[:0], nodes...), codes...)
} else {
hashQueue = append(hashQueue[:0], codes...)
pathQueue = append(pathQueue[:0], paths...)
}
for len(hashQueue)+len(pathQueue) > 0 {
results := make([]trie.SyncResult, len(hashQueue)+len(pathQueue))
for i, hash := range hashQueue {
data, err := srcDb.TrieDB().Node(hash)
if err != nil {
data, err = srcDb.ContractCode(common.Hash{}, hash)
}
if err != nil {
t.Fatalf("failed to retrieve node data for %x", hash)
t.Fatalf("failed to retrieve node data for hash %x", hash)
}
results[i] = trie.SyncResult{Hash: hash, Data: data}
}
for i, path := range pathQueue {
if len(path) == 1 {
data, _, err := srcTrie.TryGetNode(path[0])
if err != nil {
t.Fatalf("failed to retrieve node data for path %x: %v", path, err)
}
results[len(hashQueue)+i] = trie.SyncResult{Hash: crypto.Keccak256Hash(data), Data: data}
} else {
var acc Account
if err := rlp.DecodeBytes(srcTrie.Get(path[0]), &acc); err != nil {
t.Fatalf("failed to decode account on path %x: %v", path, err)
}
stTrie, err := trie.New(acc.Root, srcDb.TrieDB())
if err != nil {
t.Fatalf("failed to retriev storage trie for path %x: %v", path, err)
}
data, _, err := stTrie.TryGetNode(path[1])
if err != nil {
t.Fatalf("failed to retrieve node data for path %x: %v", path, err)
}
results[len(hashQueue)+i] = trie.SyncResult{Hash: crypto.Keccak256Hash(data), Data: data}
}
}
for _, result := range results {
if err := sched.Process(result); err != nil {
t.Fatalf("failed to process result %v", err)
t.Errorf("failed to process result %v", err)
}
}
batch := dstDb.NewBatch()
@ -171,7 +227,14 @@ func testIterativeStateSync(t *testing.T, count int, commit bool) {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
queue = append(queue[:0], sched.Missing(count)...)
nodes, paths, codes = sched.Missing(count)
if !bypath {
hashQueue = append(append(hashQueue[:0], nodes...), codes...)
} else {
hashQueue = append(hashQueue[:0], codes...)
pathQueue = append(pathQueue[:0], paths...)
}
}
// Cross check that the two states are in sync
checkStateAccounts(t, dstDb, srcRoot, srcAccounts)
@ -187,7 +250,9 @@ func TestIterativeDelayedStateSync(t *testing.T) {
dstDb := rawdb.NewMemoryDatabase()
sched := NewStateSync(srcRoot, dstDb, trie.NewSyncBloom(1, dstDb))
queue := append([]common.Hash{}, sched.Missing(0)...)
nodes, _, codes := sched.Missing(0)
queue := append(append([]common.Hash{}, nodes...), codes...)
for len(queue) > 0 {
// Sync only half of the scheduled nodes
results := make([]trie.SyncResult, len(queue)/2+1)
@ -211,7 +276,9 @@ func TestIterativeDelayedStateSync(t *testing.T) {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
queue = append(queue[len(results):], sched.Missing(0)...)
nodes, _, codes = sched.Missing(0)
queue = append(append(queue[len(results):], nodes...), codes...)
}
// Cross check that the two states are in sync
checkStateAccounts(t, dstDb, srcRoot, srcAccounts)
@ -232,7 +299,8 @@ func testIterativeRandomStateSync(t *testing.T, count int) {
sched := NewStateSync(srcRoot, dstDb, trie.NewSyncBloom(1, dstDb))
queue := make(map[common.Hash]struct{})
for _, hash := range sched.Missing(count) {
nodes, _, codes := sched.Missing(count)
for _, hash := range append(nodes, codes...) {
queue[hash] = struct{}{}
}
for len(queue) > 0 {
@ -259,8 +327,10 @@ func testIterativeRandomStateSync(t *testing.T, count int) {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
queue = make(map[common.Hash]struct{})
for _, hash := range sched.Missing(count) {
nodes, _, codes = sched.Missing(count)
for _, hash := range append(nodes, codes...) {
queue[hash] = struct{}{}
}
}
@ -279,7 +349,8 @@ func TestIterativeRandomDelayedStateSync(t *testing.T) {
sched := NewStateSync(srcRoot, dstDb, trie.NewSyncBloom(1, dstDb))
queue := make(map[common.Hash]struct{})
for _, hash := range sched.Missing(0) {
nodes, _, codes := sched.Missing(0)
for _, hash := range append(nodes, codes...) {
queue[hash] = struct{}{}
}
for len(queue) > 0 {
@ -312,7 +383,11 @@ func TestIterativeRandomDelayedStateSync(t *testing.T) {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
for _, hash := range sched.Missing(0) {
for _, result := range results {
delete(queue, result.Hash)
}
nodes, _, codes = sched.Missing(0)
for _, hash := range append(nodes, codes...) {
queue[hash] = struct{}{}
}
}
@ -341,8 +416,11 @@ func TestIncompleteStateSync(t *testing.T) {
dstDb := rawdb.NewMemoryDatabase()
sched := NewStateSync(srcRoot, dstDb, trie.NewSyncBloom(1, dstDb))
added := []common.Hash{}
queue := append([]common.Hash{}, sched.Missing(1)...)
var added []common.Hash
nodes, _, codes := sched.Missing(1)
queue := append(append([]common.Hash{}, nodes...), codes...)
for len(queue) > 0 {
// Fetch a batch of state nodes
results := make([]trie.SyncResult, len(queue))
@ -382,7 +460,8 @@ func TestIncompleteStateSync(t *testing.T) {
}
}
// Fetch the next batch to retrieve
queue = append(queue[:0], sched.Missing(1)...)
nodes, _, codes = sched.Missing(1)
queue = append(append(queue[:0], nodes...), codes...)
}
// Sanity check that removing any node from the database is detected
for _, node := range added[1:] {

153
eth/downloader/statesync.go
View File

@ -34,14 +34,15 @@ import (
// stateReq represents a batch of state fetch requests grouped together into
// a single data retrieval network packet.
type stateReq struct {
nItems uint16 // Number of items requested for download (max is 384, so uint16 is sufficient)
tasks map[common.Hash]*stateTask // Download tasks to track previous attempts
timeout time.Duration // Maximum round trip time for this to complete
timer *time.Timer // Timer to fire when the RTT timeout expires
peer *peerConnection // Peer that we're requesting from
delivered time.Time // Time when the packet was delivered (independent when we process it)
response [][]byte // Response data of the peer (nil for timeouts)
dropped bool // Flag whether the peer dropped off early
nItems uint16 // Number of items requested for download (max is 384, so uint16 is sufficient)
trieTasks map[common.Hash]*trieTask // Trie node download tasks to track previous attempts
codeTasks map[common.Hash]*codeTask // Byte code download tasks to track previous attempts
timeout time.Duration // Maximum round trip time for this to complete
timer *time.Timer // Timer to fire when the RTT timeout expires
peer *peerConnection // Peer that we're requesting from
delivered time.Time // Time when the packet was delivered (independent when we process it)
response [][]byte // Response data of the peer (nil for timeouts)
dropped bool // Flag whether the peer dropped off early
}
// timedOut returns if this request timed out.
@ -251,9 +252,11 @@ func (d *Downloader) spindownStateSync(active map[string]*stateReq, finished []*
type stateSync struct {
d *Downloader // Downloader instance to access and manage current peerset
sched *trie.Sync // State trie sync scheduler defining the tasks
keccak hash.Hash // Keccak256 hasher to verify deliveries with
tasks map[common.Hash]*stateTask // Set of tasks currently queued for retrieval
sched *trie.Sync // State trie sync scheduler defining the tasks
keccak hash.Hash // Keccak256 hasher to verify deliveries with
trieTasks map[common.Hash]*trieTask // Set of trie node tasks currently queued for retrieval
codeTasks map[common.Hash]*codeTask // Set of byte code tasks currently queued for retrieval
numUncommitted int
bytesUncommitted int
@ -269,9 +272,16 @@ type stateSync struct {
root common.Hash
}
// stateTask represents a single trie node download task, containing a set of
// trieTask represents a single trie node download task, containing a set of
// peers already attempted retrieval from to detect stalled syncs and abort.
type stateTask struct {
type trieTask struct {
path [][]byte
attempts map[string]struct{}
}
// codeTask represents a single byte code download task, containing a set of
// peers already attempted retrieval from to detect stalled syncs and abort.
type codeTask struct {
attempts map[string]struct{}
}
@ -279,15 +289,16 @@ type stateTask struct {
// yet start the sync. The user needs to call run to initiate.
func newStateSync(d *Downloader, root common.Hash) *stateSync {
return &stateSync{
d: d,
sched: state.NewStateSync(root, d.stateDB, d.stateBloom),
keccak: sha3.NewLegacyKeccak256(),
tasks: make(map[common.Hash]*stateTask),
deliver: make(chan *stateReq),
cancel: make(chan struct{}),
done: make(chan struct{}),
started: make(chan struct{}),
root: root,
d: d,
sched: state.NewStateSync(root, d.stateDB, d.stateBloom),
keccak: sha3.NewLegacyKeccak256(),
trieTasks: make(map[common.Hash]*trieTask),
codeTasks: make(map[common.Hash]*codeTask),
deliver: make(chan *stateReq),
cancel: make(chan struct{}),
done: make(chan struct{}),
started: make(chan struct{}),
root: root,
}
}
@ -411,14 +422,15 @@ func (s *stateSync) assignTasks() {
// Assign a batch of fetches proportional to the estimated latency/bandwidth
cap := p.NodeDataCapacity(s.d.requestRTT())
req := &stateReq{peer: p, timeout: s.d.requestTTL()}
items := s.fillTasks(cap, req)
nodes, _, codes := s.fillTasks(cap, req)
// If the peer was assigned tasks to fetch, send the network request
if len(items) > 0 {
req.peer.log.Trace("Requesting new batch of data", "type", "state", "count", len(items), "root", s.root)
if len(nodes)+len(codes) > 0 {
req.peer.log.Trace("Requesting batch of state data", "nodes", len(nodes), "codes", len(codes), "root", s.root)
select {
case s.d.trackStateReq <- req:
req.peer.FetchNodeData(items)
req.peer.FetchNodeData(append(nodes, codes...)) // Unified retrieval under eth/6x
case <-s.cancel:
case <-s.d.cancelCh:
}
@ -428,20 +440,34 @@ func (s *stateSync) assignTasks() {
// fillTasks fills the given request object with a maximum of n state download
// tasks to send to the remote peer.
func (s *stateSync) fillTasks(n int, req *stateReq) []common.Hash {
func (s *stateSync) fillTasks(n int, req *stateReq) (nodes []common.Hash, paths []trie.SyncPath, codes []common.Hash) {
// Refill available tasks from the scheduler.
if len(s.tasks) < n {
new := s.sched.Missing(n - len(s.tasks))
for _, hash := range new {
s.tasks[hash] = &stateTask{make(map[string]struct{})}
if fill := n - (len(s.trieTasks) + len(s.codeTasks)); fill > 0 {
nodes, paths, codes := s.sched.Missing(fill)
for i, hash := range nodes {
s.trieTasks[hash] = &trieTask{
path: paths[i],
attempts: make(map[string]struct{}),
}
}
for _, hash := range codes {
s.codeTasks[hash] = &codeTask{
attempts: make(map[string]struct{}),
}
}
}
// Find tasks that haven't been tried with the request's peer.
items := make([]common.Hash, 0, n)
req.tasks = make(map[common.Hash]*stateTask, n)
for hash, t := range s.tasks {
// Find tasks that haven't been tried with the request's peer. Prefer code
// over trie nodes as those can be written to disk and forgotten about.
nodes = make([]common.Hash, 0, n)
paths = make([]trie.SyncPath, 0, n)
codes = make([]common.Hash, 0, n)
req.trieTasks = make(map[common.Hash]*trieTask, n)
req.codeTasks = make(map[common.Hash]*codeTask, n)
for hash, t := range s.codeTasks {
// Stop when we've gathered enough requests
if len(items) == n {
if len(nodes)+len(codes) == n {
break
}
// Skip any requests we've already tried from this peer
@ -450,12 +476,30 @@ func (s *stateSync) fillTasks(n int, req *stateReq) []common.Hash {
}
// Assign the request to this peer
t.attempts[req.peer.id] = struct{}{}
items = append(items, hash)
req.tasks[hash] = t
delete(s.tasks, hash)
codes = append(codes, hash)
req.codeTasks[hash] = t
delete(s.codeTasks, hash)
}
req.nItems = uint16(len(items))
return items
for hash, t := range s.trieTasks {
// Stop when we've gathered enough requests
if len(nodes)+len(codes) == n {
break
}
// Skip any requests we've already tried from this peer
if _, ok := t.attempts[req.peer.id]; ok {
continue
}
// Assign the request to this peer
t.attempts[req.peer.id] = struct{}{}
nodes = append(nodes, hash)
paths = append(paths, t.path)
req.trieTasks[hash] = t
delete(s.trieTasks, hash)
}
req.nItems = uint16(len(nodes) + len(codes))
return nodes, paths, codes
}
// process iterates over a batch of delivered state data, injecting each item
@ -487,11 +531,13 @@ func (s *stateSync) process(req *stateReq) (int, error) {
default:
return successful, fmt.Errorf("invalid state node %s: %v", hash.TerminalString(), err)
}
delete(req.tasks, hash)
// Delete from both queues (one delivery is enough for the syncer)
delete(req.trieTasks, hash)
delete(req.codeTasks, hash)
}
// Put unfulfilled tasks back into the retry queue
npeers := s.d.peers.Len()
for hash, task := range req.tasks {
for hash, task := range req.trieTasks {
// If the node did deliver something, missing items may be due to a protocol
// limit or a previous timeout + delayed delivery. Both cases should permit
// the node to retry the missing items (to avoid single-peer stalls).
@ -501,10 +547,25 @@ func (s *stateSync) process(req *stateReq) (int, error) {
// If we've requested the node too many times already, it may be a malicious
// sync where nobody has the right data. Abort.
if len(task.attempts) >= npeers {
return successful, fmt.Errorf("state node %s failed with all peers (%d tries, %d peers)", hash.TerminalString(), len(task.attempts), npeers)
return successful, fmt.Errorf("trie node %s failed with all peers (%d tries, %d peers)", hash.TerminalString(), len(task.attempts), npeers)
}
// Missing item, place into the retry queue.
s.tasks[hash] = task
s.trieTasks[hash] = task
}
for hash, task := range req.codeTasks {
// If the node did deliver something, missing items may be due to a protocol
// limit or a previous timeout + delayed delivery. Both cases should permit
// the node to retry the missing items (to avoid single-peer stalls).
if len(req.response) > 0 || req.timedOut() {
delete(task.attempts, req.peer.id)
}
// If we've requested the node too many times already, it may be a malicious
// sync where nobody has the right data. Abort.
if len(task.attempts) >= npeers {
return successful, fmt.Errorf("byte code %s failed with all peers (%d tries, %d peers)", hash.TerminalString(), len(task.attempts), npeers)
}
// Missing item, place into the retry queue.
s.codeTasks[hash] = task
}
return successful, nil
}
@ -533,7 +594,7 @@ func (s *stateSync) updateStats(written, duplicate, unexpected int, duration tim
s.d.syncStatsState.unexpected += uint64(unexpected)
if written > 0 || duplicate > 0 || unexpected > 0 {
log.Info("Imported new state entries", "count", written, "elapsed", common.PrettyDuration(duration), "processed", s.d.syncStatsState.processed, "pending", s.d.syncStatsState.pending, "retry", len(s.tasks), "duplicate", s.d.syncStatsState.duplicate, "unexpected", s.d.syncStatsState.unexpected)
log.Info("Imported new state entries", "count", written, "elapsed", common.PrettyDuration(duration), "processed", s.d.syncStatsState.processed, "pending", s.d.syncStatsState.pending, "trieretry", len(s.trieTasks), "coderetry", len(s.codeTasks), "duplicate", s.d.syncStatsState.duplicate, "unexpected", s.d.syncStatsState.unexpected)
}
if written > 0 {
rawdb.WriteFastTrieProgress(s.d.stateDB, s.d.syncStatsState.processed)

6
trie/secure_trie.go
View File

@ -79,6 +79,12 @@ func (t *SecureTrie) TryGet(key []byte) ([]byte, error) {
return t.trie.TryGet(t.hashKey(key))
}
// TryGetNode attempts to retrieve a trie node by compact-encoded path. It is not
// possible to use keybyte-encoding as the path might contain odd nibbles.
func (t *SecureTrie) TryGetNode(path []byte) ([]byte, int, error) {
return t.trie.TryGetNode(path)
}
// Update associates key with value in the trie. Subsequent calls to
// Get will return value. If value has length zero, any existing value
// is deleted from the trie and calls to Get will return nil.

66
trie/sync.go
View File

@ -52,6 +52,39 @@ type request struct {
callback LeafCallback // Callback to invoke if a leaf node it reached on this branch
}
// SyncPath is a path tuple identifying a particular trie node either in a single
// trie (account) or a layered trie (account -> storage).
//
// Content wise the tuple either has 1 element if it addresses a node in a single
// trie or 2 elements if it addresses a node in a stacked trie.
//
// To support aiming arbitrary trie nodes, the path needs to support odd nibble
// lengths. To avoid transferring expanded hex form over the network, the last
// part of the tuple (which needs to index into the middle of a trie) is compact
// encoded. In case of a 2-tuple, the first item is always 32 bytes so that is
// simple binary encoded.
//
// Examples:
// - Path 0x9 -> {0x19}
// - Path 0x99 -> {0x0099}
// - Path 0x01234567890123456789012345678901012345678901234567890123456789019 -> {0x0123456789012345678901234567890101234567890123456789012345678901, 0x19}
// - Path 0x012345678901234567890123456789010123456789012345678901234567890199 -> {0x0123456789012345678901234567890101234567890123456789012345678901, 0x0099}
type SyncPath [][]byte
// newSyncPath converts an expanded trie path from nibble form into a compact
// version that can be sent over the network.
func newSyncPath(path []byte) SyncPath {
// If the hash is from the account trie, append a single item, if it
// is from the a storage trie, append a tuple. Note, the length 64 is
// clashing between account leaf and storage root. It's fine though
// because having a trie node at 64 depth means a hash collision was
// found and we're long dead.
if len(path) < 64 {
return SyncPath{hexToCompact(path)}
}
return SyncPath{hexToKeybytes(path[:64]), hexToCompact(path[64:])}
}
// SyncResult is a response with requested data along with it's hash.
type SyncResult struct {
Hash common.Hash // Hash of the originally unknown trie node
@ -193,10 +226,16 @@ func (s *Sync) AddCodeEntry(hash common.Hash, path []byte, parent common.Hash) {
s.schedule(req)
}
// Missing retrieves the known missing nodes from the trie for retrieval.
func (s *Sync) Missing(max int) []common.Hash {
var requests []common.Hash
for !s.queue.Empty() && (max == 0 || len(requests) < max) {
// Missing retrieves the known missing nodes from the trie for retrieval. To aid
// both eth/6x style fast sync and snap/1x style state sync, the paths of trie
// nodes are returned too, as well as separate hash list for codes.
func (s *Sync) Missing(max int) (nodes []common.Hash, paths []SyncPath, codes []common.Hash) {
var (
nodeHashes []common.Hash
nodePaths []SyncPath
codeHashes []common.Hash
)
for !s.queue.Empty() && (max == 0 || len(nodeHashes)+len(codeHashes) < max) {
// Retrieve th enext item in line
item, prio := s.queue.Peek()
@ -208,9 +247,16 @@ func (s *Sync) Missing(max int) []common.Hash {
// Item is allowed to be scheduled, add it to the task list
s.queue.Pop()
s.fetches[depth]++
requests = append(requests, item.(common.Hash))
hash := item.(common.Hash)
if req, ok := s.nodeReqs[hash]; ok {
nodeHashes = append(nodeHashes, hash)
nodePaths = append(nodePaths, newSyncPath(req.path))
} else {
codeHashes = append(codeHashes, hash)
}
}
return requests
return nodeHashes, nodePaths, codeHashes
}
// Process injects the received data for requested item. Note it can
@ -322,9 +368,13 @@ func (s *Sync) children(req *request, object node) ([]*request, error) {
switch node := (object).(type) {
case *shortNode:
key := node.Key
if hasTerm(key) {
key = key[:len(key)-1]
}
children = []child{{
node: node.Val,
path: append(append([]byte(nil), req.path...), node.Key...),
path: append(append([]byte(nil), req.path...), key...),
}}
case *fullNode:
for i := 0; i < 17; i++ {
@ -344,7 +394,7 @@ func (s *Sync) children(req *request, object node) ([]*request, error) {
// Notify any external watcher of a new key/value node
if req.callback != nil {
if node, ok := (child.node).(valueNode); ok {
if err := req.callback(req.path, node, req.hash); err != nil {
if err := req.callback(child.path, node, req.hash); err != nil {
return nil, err
}
}

149
trie/sync_test.go
View File

@ -21,14 +21,15 @@ import (
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb/memorydb"
)
// makeTestTrie create a sample test trie to test node-wise reconstruction.
func makeTestTrie() (*Database, *Trie, map[string][]byte) {
func makeTestTrie() (*Database, *SecureTrie, map[string][]byte) {
// Create an empty trie
triedb := NewDatabase(memorydb.New())
trie, _ := New(common.Hash{}, triedb)
trie, _ := NewSecure(common.Hash{}, triedb)
// Fill it with some arbitrary data
content := make(map[string][]byte)
@ -59,7 +60,7 @@ func makeTestTrie() (*Database, *Trie, map[string][]byte) {
// content map.
func checkTrieContents(t *testing.T, db *Database, root []byte, content map[string][]byte) {
// Check root availability and trie contents
trie, err := New(common.BytesToHash(root), db)
trie, err := NewSecure(common.BytesToHash(root), db)
if err != nil {
t.Fatalf("failed to create trie at %x: %v", root, err)
}
@ -76,7 +77,7 @@ func checkTrieContents(t *testing.T, db *Database, root []byte, content map[stri
// checkTrieConsistency checks that all nodes in a trie are indeed present.
func checkTrieConsistency(db *Database, root common.Hash) error {
// Create and iterate a trie rooted in a subnode
trie, err := New(root, db)
trie, err := NewSecure(root, db)
if err != nil {
return nil // Consider a non existent state consistent
}
@ -94,18 +95,21 @@ func TestEmptySync(t *testing.T) {
emptyB, _ := New(emptyRoot, dbB)
for i, trie := range []*Trie{emptyA, emptyB} {
if req := NewSync(trie.Hash(), memorydb.New(), nil, NewSyncBloom(1, memorydb.New())).Missing(1); len(req) != 0 {
t.Errorf("test %d: content requested for empty trie: %v", i, req)
sync := NewSync(trie.Hash(), memorydb.New(), nil, NewSyncBloom(1, memorydb.New()))
if nodes, paths, codes := sync.Missing(1); len(nodes) != 0 || len(paths) != 0 || len(codes) != 0 {
t.Errorf("test %d: content requested for empty trie: %v, %v, %v", i, nodes, paths, codes)
}
}
}
// Tests that given a root hash, a trie can sync iteratively on a single thread,
// requesting retrieval tasks and returning all of them in one go.
func TestIterativeSyncIndividual(t *testing.T) { testIterativeSync(t, 1) }
func TestIterativeSyncBatched(t *testing.T) { testIterativeSync(t, 100) }
func TestIterativeSyncIndividual(t *testing.T) { testIterativeSync(t, 1, false) }
func TestIterativeSyncBatched(t *testing.T) { testIterativeSync(t, 100, false) }
func TestIterativeSyncIndividualByPath(t *testing.T) { testIterativeSync(t, 1, true) }
func TestIterativeSyncBatchedByPath(t *testing.T) { testIterativeSync(t, 100, true) }
func testIterativeSync(t *testing.T, count int) {
func testIterativeSync(t *testing.T, count int, bypath bool) {
// Create a random trie to copy
srcDb, srcTrie, srcData := makeTestTrie()
@ -114,16 +118,33 @@ func testIterativeSync(t *testing.T, count int) {
triedb := NewDatabase(diskdb)
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
queue := append([]common.Hash{}, sched.Missing(count)...)
for len(queue) > 0 {
results := make([]SyncResult, len(queue))
for i, hash := range queue {
nodes, paths, codes := sched.Missing(count)
var (
hashQueue []common.Hash
pathQueue []SyncPath
)
if !bypath {
hashQueue = append(append(hashQueue[:0], nodes...), codes...)
} else {
hashQueue = append(hashQueue[:0], codes...)
pathQueue = append(pathQueue[:0], paths...)
}
for len(hashQueue)+len(pathQueue) > 0 {
results := make([]SyncResult, len(hashQueue)+len(pathQueue))
for i, hash := range hashQueue {
data, err := srcDb.Node(hash)
if err != nil {
t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
t.Fatalf("failed to retrieve node data for hash %x: %v", hash, err)
}
results[i] = SyncResult{hash, data}
}
for i, path := range pathQueue {
data, _, err := srcTrie.TryGetNode(path[0])
if err != nil {
t.Fatalf("failed to retrieve node data for path %x: %v", path, err)
}
results[len(hashQueue)+i] = SyncResult{crypto.Keccak256Hash(data), data}
}
for _, result := range results {
if err := sched.Process(result); err != nil {
t.Fatalf("failed to process result %v", err)
@ -134,7 +155,14 @@ func testIterativeSync(t *testing.T, count int) {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
queue = append(queue[:0], sched.Missing(count)...)
nodes, paths, codes = sched.Missing(count)
if !bypath {
hashQueue = append(append(hashQueue[:0], nodes...), codes...)
} else {
hashQueue = append(hashQueue[:0], codes...)
pathQueue = append(pathQueue[:0], paths...)
}
}
// Cross check that the two tries are in sync
checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
@ -151,7 +179,9 @@ func TestIterativeDelayedSync(t *testing.T) {
triedb := NewDatabase(diskdb)
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
queue := append([]common.Hash{}, sched.Missing(10000)...)
nodes, _, codes := sched.Missing(10000)
queue := append(append([]common.Hash{}, nodes...), codes...)
for len(queue) > 0 {
// Sync only half of the scheduled nodes
results := make([]SyncResult, len(queue)/2+1)
@ -172,7 +202,9 @@ func TestIterativeDelayedSync(t *testing.T) {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
queue = append(queue[len(results):], sched.Missing(10000)...)
nodes, _, codes = sched.Missing(10000)
queue = append(append(queue[len(results):], nodes...), codes...)
}
// Cross check that the two tries are in sync
checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
@ -194,7 +226,8 @@ func testIterativeRandomSync(t *testing.T, count int) {
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
queue := make(map[common.Hash]struct{})
for _, hash := range sched.Missing(count) {
nodes, _, codes := sched.Missing(count)
for _, hash := range append(nodes, codes...) {
queue[hash] = struct{}{}
}
for len(queue) > 0 {
@ -218,8 +251,10 @@ func testIterativeRandomSync(t *testing.T, count int) {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
queue = make(map[common.Hash]struct{})
for _, hash := range sched.Missing(count) {
nodes, _, codes = sched.Missing(count)
for _, hash := range append(nodes, codes...) {
queue[hash] = struct{}{}
}
}
@ -239,7 +274,8 @@ func TestIterativeRandomDelayedSync(t *testing.T) {
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
queue := make(map[common.Hash]struct{})
for _, hash := range sched.Missing(10000) {
nodes, _, codes := sched.Missing(10000)
for _, hash := range append(nodes, codes...) {
queue[hash] = struct{}{}
}
for len(queue) > 0 {
@ -270,7 +306,8 @@ func TestIterativeRandomDelayedSync(t *testing.T) {
for _, result := range results {
delete(queue, result.Hash)
}
for _, hash := range sched.Missing(10000) {
nodes, _, codes = sched.Missing(10000)
for _, hash := range append(nodes, codes...) {
queue[hash] = struct{}{}
}
}
@ -289,7 +326,8 @@ func TestDuplicateAvoidanceSync(t *testing.T) {
triedb := NewDatabase(diskdb)
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
queue := append([]common.Hash{}, sched.Missing(0)...)
nodes, _, codes := sched.Missing(0)
queue := append(append([]common.Hash{}, nodes...), codes...)
requested := make(map[common.Hash]struct{})
for len(queue) > 0 {
@ -316,7 +354,9 @@ func TestDuplicateAvoidanceSync(t *testing.T) {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
queue = append(queue[:0], sched.Missing(0)...)
nodes, _, codes = sched.Missing(0)
queue = append(append(queue[:0], nodes...), codes...)
}
// Cross check that the two tries are in sync
checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
@ -334,7 +374,10 @@ func TestIncompleteSync(t *testing.T) {
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
var added []common.Hash
queue := append([]common.Hash{}, sched.Missing(1)...)
nodes, _, codes := sched.Missing(1)
queue := append(append([]common.Hash{}, nodes...), codes...)
for len(queue) > 0 {
// Fetch a batch of trie nodes
results := make([]SyncResult, len(queue))
@ -366,7 +409,8 @@ func TestIncompleteSync(t *testing.T) {
}
}
// Fetch the next batch to retrieve
queue = append(queue[:0], sched.Missing(1)...)
nodes, _, codes = sched.Missing(1)
queue = append(append(queue[:0], nodes...), codes...)
}
// Sanity check that removing any node from the database is detected
for _, node := range added[1:] {
@ -380,3 +424,58 @@ func TestIncompleteSync(t *testing.T) {
diskdb.Put(key, value)
}
}
// Tests that trie nodes get scheduled lexicographically when having the same
// depth.
func TestSyncOrdering(t *testing.T) {
// Create a random trie to copy
srcDb, srcTrie, srcData := makeTestTrie()
// Create a destination trie and sync with the scheduler, tracking the requests
diskdb := memorydb.New()
triedb := NewDatabase(diskdb)
sched := NewSync(srcTrie.Hash(), diskdb, nil, NewSyncBloom(1, diskdb))
nodes, paths, _ := sched.Missing(1)
queue := append([]common.Hash{}, nodes...)
reqs := append([]SyncPath{}, paths...)
for len(queue) > 0 {
results := make([]SyncResult, len(queue))
for i, hash := range queue {
data, err := srcDb.Node(hash)
if err != nil {
t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
}
results[i] = SyncResult{hash, data}
}
for _, result := range results {
if err := sched.Process(result); err != nil {
t.Fatalf("failed to process result %v", err)
}
}
batch := diskdb.NewBatch()
if err := sched.Commit(batch); err != nil {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
nodes, paths, _ = sched.Missing(1)
queue = append(queue[:0], nodes...)
reqs = append(reqs, paths...)
}
// Cross check that the two tries are in sync
checkTrieContents(t, triedb, srcTrie.Hash().Bytes(), srcData)
// Check that the trie nodes have been requested path-ordered
for i := 0; i < len(reqs)-1; i++ {
if len(reqs[i]) > 1 || len(reqs[i+1]) > 1 {
// In the case of the trie tests, there's no storage so the tuples
// must always be single items. 2-tuples should be tested in state.
t.Errorf("Invalid request tuples: len(%v) or len(%v) > 1", reqs[i], reqs[i+1])
}
if bytes.Compare(compactToHex(reqs[i][0]), compactToHex(reqs[i+1][0])) > 0 {
t.Errorf("Invalid request order: %v before %v", compactToHex(reqs[i][0]), compactToHex(reqs[i+1][0]))
}
}
}

84
trie/trie.go
View File

@ -25,6 +25,7 @@ import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/rlp"
)
var (
@ -102,8 +103,7 @@ func (t *Trie) Get(key []byte) []byte {
// The value bytes must not be modified by the caller.
// If a node was not found in the database, a MissingNodeError is returned.
func (t *Trie) TryGet(key []byte) ([]byte, error) {
key = keybytesToHex(key)
value, newroot, didResolve, err := t.tryGet(t.root, key, 0)
value, newroot, didResolve, err := t.tryGet(t.root, keybytesToHex(key), 0)
if err == nil && didResolve {
t.root = newroot
}
@ -146,6 +146,86 @@ func (t *Trie) tryGet(origNode node, key []byte, pos int) (value []byte, newnode
}
}
// TryGetNode attempts to retrieve a trie node by compact-encoded path. It is not
// possible to use keybyte-encoding as the path might contain odd nibbles.
func (t *Trie) TryGetNode(path []byte) ([]byte, int, error) {
item, newroot, resolved, err := t.tryGetNode(t.root, compactToHex(path), 0)
if err != nil {
return nil, resolved, err
}
if resolved > 0 {
t.root = newroot
}
if item == nil {
return nil, resolved, nil
}
enc, err := rlp.EncodeToBytes(item)
if err != nil {
log.Error("Encoding existing trie node failed", "err", err)
return nil, resolved, err
}
return enc, resolved, err
}
func (t *Trie) tryGetNode(origNode node, path []byte, pos int) (item node, newnode node, resolved int, err error) {
// If we reached the requested path, return the current node
if pos >= len(path) {
// Don't return collapsed hash nodes though
if _, ok := origNode.(hashNode); !ok {
// Short nodes have expanded keys, compact them before returning
item := origNode
if sn, ok := item.(*shortNode); ok {
item = &shortNode{
Key: hexToCompact(sn.Key),
Val: sn.Val,
}
}
return item, origNode, 0, nil
}
}
// Path still needs to be traversed, descend into children
switch n := (origNode).(type) {
case nil:
// Non-existent path requested, abort
return nil, nil, 0, nil
case valueNode:
// Path prematurely ended, abort
return nil, nil, 0, nil
case *shortNode:
if len(path)-pos < len(n.Key) || !bytes.Equal(n.Key, path[pos:pos+len(n.Key)]) {
// Path branches off from short node
return nil, n, 0, nil
}
item, newnode, resolved, err = t.tryGetNode(n.Val, path, pos+len(n.Key))
if err == nil && resolved > 0 {
n = n.copy()
n.Val = newnode
}
return item, n, resolved, err
case *fullNode:
item, newnode, resolved, err = t.tryGetNode(n.Children[path[pos]], path, pos+1)
if err == nil && resolved > 0 {
n = n.copy()
n.Children[path[pos]] = newnode
}
return item, n, resolved, err
case hashNode:
child, err := t.resolveHash(n, path[:pos])
if err != nil {
return nil, n, 1, err
}
item, newnode, resolved, err := t.tryGetNode(child, path, pos)
return item, newnode, resolved + 1, err
default:
panic(fmt.Sprintf("%T: invalid node: %v", origNode, origNode))
}
}
// Update associates key with value in the trie. Subsequent calls to
// Get will return value. If value has length zero, any existing value
// is deleted from the trie and calls to Get will return nil.