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cmd/geth, core/state/snapshot: rework journal loading, implement account-check (#24765)

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* cmd/geth, core/state/snapshot: rework journal loading, implement account-check

* core/state/snapshot, cmd/geth: polish code (#37)

* core/state/snapshot: minor nits

* core/state/snapshot: simplify error logic

* cmd/geth: go format

Co-authored-by: rjl493456442 <garyrong0905@gmail.com>
This commit is contained in:
Martin Holst Swende 2022-06-06 17:09:39 +02:00 committed by GitHub
parent d6b55749e6
commit c375ee91e9
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 211 additions and 157 deletions
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44
cmd/geth/snapshot.go
View File

@ -101,6 +101,18 @@ In other words, this command does the snapshot to trie conversion.
Description: `
geth snapshot check-dangling-storage <state-root> traverses the snap storage
data, and verifies that all snapshot storage data has a corresponding account.
`,
},
{
Name: "inspect-account",
Usage: "Check all snapshot layers for the a specific account",
ArgsUsage: "<address | hash>",
Action: utils.MigrateFlags(checkAccount),
Category: "MISCELLANEOUS COMMANDS",
Flags: utils.GroupFlags(utils.NetworkFlags, utils.DatabasePathFlags),
Description: `
geth snapshot inspect-account <address | hash> checks all snapshot layers and prints out
information about the specified address.
`,
},
{
@ -535,3 +547,35 @@ func dumpState(ctx *cli.Context) error {
"elapsed", common.PrettyDuration(time.Since(start)))
return nil
}
// checkAccount iterates the snap data layers, and looks up the given account
// across all layers.
func checkAccount(ctx *cli.Context) error {
if ctx.NArg() != 1 {
return errors.New("need <address|hash> arg")
}
var (
hash common.Hash
addr common.Address
)
switch len(ctx.Args()[0]) {
case 40, 42:
addr = common.HexToAddress(ctx.Args()[0])
hash = crypto.Keccak256Hash(addr.Bytes())
case 64, 66:
hash = common.HexToHash(ctx.Args()[0])
default:
return errors.New("malformed address or hash")
}
stack, _ := makeConfigNode(ctx)
defer stack.Close()
chaindb := utils.MakeChainDatabase(ctx, stack, true)
defer chaindb.Close()
start := time.Now()
log.Info("Checking difflayer journal", "address", addr, "hash", hash)
if err := snapshot.CheckJournalAccount(chaindb, hash); err != nil {
return err
}
log.Info("Checked the snapshot journalled storage", "time", common.PrettyDuration(time.Since(start)))
return nil
}

2
core/state/snapshot/generate_test.go
View File

@ -171,7 +171,7 @@ func checkSnapRoot(t *testing.T, snap *diskLayer, trieRoot common.Hash) {
t.Fatalf("snaproot: %#x != trieroot #%x", snapRoot, trieRoot)
}
if err := CheckDanglingStorage(snap.diskdb); err != nil {
t.Fatalf("Detected dangling storages %v", err)
t.Fatalf("Detected dangling storages: %v", err)
}
}

185
core/state/snapshot/journal.go
View File

@ -108,44 +108,15 @@ func loadAndParseJournal(db ethdb.KeyValueStore, base *diskLayer) (snapshot, jou
// So if there is no journal, or the journal is invalid(e.g. the journal
// is not matched with disk layer; or the it's the legacy-format journal,
// etc.), we just discard all diffs and try to recover them later.
journal := rawdb.ReadSnapshotJournal(db)
if len(journal) == 0 {
log.Warn("Loaded snapshot journal", "diskroot", base.root, "diffs", "missing")
return base, generator, nil
}
r := rlp.NewStream(bytes.NewReader(journal), 0)
// Firstly, resolve the first element as the journal version
version, err := r.Uint()
var current snapshot = base
err := iterateJournal(db, func(parent common.Hash, root common.Hash, destructSet map[common.Hash]struct{}, accountData map[common.Hash][]byte, storageData map[common.Hash]map[common.Hash][]byte) error {
current = newDiffLayer(current, root, destructSet, accountData, storageData)
return nil
})
if err != nil {
log.Warn("Failed to resolve the journal version", "error", err)
return base, generator, nil
}
if version != journalVersion {
log.Warn("Discarded the snapshot journal with wrong version", "required", journalVersion, "got", version)
return base, generator, nil
}
// Secondly, resolve the disk layer root, ensure it's continuous
// with disk layer. Note now we can ensure it's the snapshot journal
// correct version, so we expect everything can be resolved properly.
var root common.Hash
if err := r.Decode(&root); err != nil {
return nil, journalGenerator{}, errors.New("missing disk layer root")
}
// The diff journal is not matched with disk, discard them.
// It can happen that Geth crashes without persisting the latest
// diff journal.
if !bytes.Equal(root.Bytes(), base.root.Bytes()) {
log.Warn("Loaded snapshot journal", "diskroot", base.root, "diffs", "unmatched")
return base, generator, nil
}
// Load all the snapshot diffs from the journal
snapshot, err := loadDiffLayer(base, r)
if err != nil {
return nil, journalGenerator{}, err
}
log.Debug("Loaded snapshot journal", "diskroot", base.root, "diffhead", snapshot.Root())
return snapshot, generator, nil
return current, generator, nil
}
// loadSnapshot loads a pre-existing state snapshot backed by a key-value store.
@ -218,57 +189,6 @@ func loadSnapshot(diskdb ethdb.KeyValueStore, triedb *trie.Database, cache int,
return snapshot, false, nil
}
// loadDiffLayer reads the next sections of a snapshot journal, reconstructing a new
// diff and verifying that it can be linked to the requested parent.
func loadDiffLayer(parent snapshot, r *rlp.Stream) (snapshot, error) {
// Read the next diff journal entry
var root common.Hash
if err := r.Decode(&root); err != nil {
// The first read may fail with EOF, marking the end of the journal
if err == io.EOF {
return parent, nil
}
return nil, fmt.Errorf("load diff root: %v", err)
}
var destructs []journalDestruct
if err := r.Decode(&destructs); err != nil {
return nil, fmt.Errorf("load diff destructs: %v", err)
}
destructSet := make(map[common.Hash]struct{})
for _, entry := range destructs {
destructSet[entry.Hash] = struct{}{}
}
var accounts []journalAccount
if err := r.Decode(&accounts); err != nil {
return nil, fmt.Errorf("load diff accounts: %v", err)
}
accountData := make(map[common.Hash][]byte)
for _, entry := range accounts {
if len(entry.Blob) > 0 { // RLP loses nil-ness, but `[]byte{}` is not a valid item, so reinterpret that
accountData[entry.Hash] = entry.Blob
} else {
accountData[entry.Hash] = nil
}
}
var storage []journalStorage
if err := r.Decode(&storage); err != nil {
return nil, fmt.Errorf("load diff storage: %v", err)
}
storageData := make(map[common.Hash]map[common.Hash][]byte)
for _, entry := range storage {
slots := make(map[common.Hash][]byte)
for i, key := range entry.Keys {
if len(entry.Vals[i]) > 0 { // RLP loses nil-ness, but `[]byte{}` is not a valid item, so reinterpret that
slots[key] = entry.Vals[i]
} else {
slots[key] = nil
}
}
storageData[entry.Hash] = slots
}
return loadDiffLayer(newDiffLayer(parent, root, destructSet, accountData, storageData), r)
}
// Journal terminates any in-progress snapshot generation, also implicitly pushing
// the progress into the database.
func (dl *diskLayer) Journal(buffer *bytes.Buffer) (common.Hash, error) {
@ -345,3 +265,96 @@ func (dl *diffLayer) Journal(buffer *bytes.Buffer) (common.Hash, error) {
log.Debug("Journalled diff layer", "root", dl.root, "parent", dl.parent.Root())
return base, nil
}
// journalCallback is a function which is invoked by iterateJournal, every
// time a difflayer is loaded from disk.
type journalCallback = func(parent common.Hash, root common.Hash, destructs map[common.Hash]struct{}, accounts map[common.Hash][]byte, storage map[common.Hash]map[common.Hash][]byte) error
// iterateJournal iterates through the journalled difflayers, loading them from
// the database, and invoking the callback for each loaded layer.
// The order is incremental; starting with the bottom-most difflayer, going towards
// the most recent layer.
// This method returns error either if there was some error reading from disk,
// OR if the callback returns an error when invoked.
func iterateJournal(db ethdb.KeyValueReader, callback journalCallback) error {
journal := rawdb.ReadSnapshotJournal(db)
if len(journal) == 0 {
log.Warn("Loaded snapshot journal", "diffs", "missing")
return nil
}
r := rlp.NewStream(bytes.NewReader(journal), 0)
// Firstly, resolve the first element as the journal version
version, err := r.Uint()
if err != nil {
log.Warn("Failed to resolve the journal version", "error", err)
return errors.New("failed to resolve journal version")
}
if version != journalVersion {
log.Warn("Discarded the snapshot journal with wrong version", "required", journalVersion, "got", version)
return errors.New("wrong journal version")
}
// Secondly, resolve the disk layer root, ensure it's continuous
// with disk layer. Note now we can ensure it's the snapshot journal
// correct version, so we expect everything can be resolved properly.
var parent common.Hash
if err := r.Decode(&parent); err != nil {
return errors.New("missing disk layer root")
}
if baseRoot := rawdb.ReadSnapshotRoot(db); baseRoot != parent {
log.Warn("Loaded snapshot journal", "diskroot", baseRoot, "diffs", "unmatched")
return fmt.Errorf("mismatched disk and diff layers")
}
for {
var (
root common.Hash
destructs []journalDestruct
accounts []journalAccount
storage []journalStorage
destructSet = make(map[common.Hash]struct{})
accountData = make(map[common.Hash][]byte)
storageData = make(map[common.Hash]map[common.Hash][]byte)
)
// Read the next diff journal entry
if err := r.Decode(&root); err != nil {
// The first read may fail with EOF, marking the end of the journal
if errors.Is(err, io.EOF) {
return nil
}
return fmt.Errorf("load diff root: %v", err)
}
if err := r.Decode(&destructs); err != nil {
return fmt.Errorf("load diff destructs: %v", err)
}
if err := r.Decode(&accounts); err != nil {
return fmt.Errorf("load diff accounts: %v", err)
}
if err := r.Decode(&storage); err != nil {
return fmt.Errorf("load diff storage: %v", err)
}
for _, entry := range destructs {
destructSet[entry.Hash] = struct{}{}
}
for _, entry := range accounts {
if len(entry.Blob) > 0 { // RLP loses nil-ness, but `[]byte{}` is not a valid item, so reinterpret that
accountData[entry.Hash] = entry.Blob
} else {
accountData[entry.Hash] = nil
}
}
for _, entry := range storage {
slots := make(map[common.Hash][]byte)
for i, key := range entry.Keys {
if len(entry.Vals[i]) > 0 { // RLP loses nil-ness, but `[]byte{}` is not a valid item, so reinterpret that
slots[key] = entry.Vals[i]
} else {
slots[key] = nil
}
}
storageData[entry.Hash] = slots
}
if err := callback(parent, root, destructSet, accountData, storageData); err != nil {
return err
}
parent = root
}
}

127
core/state/snapshot/dangling.go → core/state/snapshot/utils.go
View File

@ -18,9 +18,7 @@ package snapshot
import (
"bytes"
"errors"
"fmt"
"io"
"time"
"github.com/ethereum/go-ethereum/common"
@ -34,7 +32,7 @@ import (
// storage also has corresponding account data.
func CheckDanglingStorage(chaindb ethdb.KeyValueStore) error {
if err := checkDanglingDiskStorage(chaindb); err != nil {
return err
log.Error("Database check error", "err", err)
}
return checkDanglingMemStorage(chaindb)
}
@ -75,81 +73,80 @@ func checkDanglingDiskStorage(chaindb ethdb.KeyValueStore) error {
// checkDanglingMemStorage checks if there is any 'dangling' storage in the journalled
// snapshot difflayers.
func checkDanglingMemStorage(db ethdb.KeyValueStore) error {
var (
start = time.Now()
journal = rawdb.ReadSnapshotJournal(db)
)
if len(journal) == 0 {
log.Warn("Loaded snapshot journal", "diffs", "missing")
return nil
start := time.Now()
log.Info("Checking dangling journalled storage")
err := iterateJournal(db, func(pRoot, root common.Hash, destructs map[common.Hash]struct{}, accounts map[common.Hash][]byte, storage map[common.Hash]map[common.Hash][]byte) error {
for accHash := range storage {
if _, ok := accounts[accHash]; !ok {
log.Error("Dangling storage - missing account", "account", fmt.Sprintf("%#x", accHash), "root", root)
}
r := rlp.NewStream(bytes.NewReader(journal), 0)
// Firstly, resolve the first element as the journal version
version, err := r.Uint()
}
return nil
})
if err != nil {
log.Warn("Failed to resolve the journal version", "error", err)
return nil
}
if version != journalVersion {
log.Warn("Discarded the snapshot journal with wrong version", "required", journalVersion, "got", version)
return nil
}
// Secondly, resolve the disk layer root, ensure it's continuous
// with disk layer. Note now we can ensure it's the snapshot journal
// correct version, so we expect everything can be resolved properly.
var root common.Hash
if err := r.Decode(&root); err != nil {
return errors.New("missing disk layer root")
}
// The diff journal is not matched with disk, discard them.
// It can happen that Geth crashes without persisting the latest
// diff journal.
// Load all the snapshot diffs from the journal
if err := checkDanglingJournalStorage(r); err != nil {
log.Info("Failed to resolve snapshot journal", "err", err)
return err
}
log.Info("Verified the snapshot journalled storage", "time", common.PrettyDuration(time.Since(start)))
return nil
}
// loadDiffLayer reads the next sections of a snapshot journal, reconstructing a new
// diff and verifying that it can be linked to the requested parent.
func checkDanglingJournalStorage(r *rlp.Stream) error {
for {
// Read the next diff journal entry
var root common.Hash
if err := r.Decode(&root); err != nil {
// The first read may fail with EOF, marking the end of the journal
if err == io.EOF {
// CheckJournalAccount shows information about an account, from the disk layer and
// up through the diff layers.
func CheckJournalAccount(db ethdb.KeyValueStore, hash common.Hash) error {
// Look up the disk layer first
baseRoot := rawdb.ReadSnapshotRoot(db)
fmt.Printf("Disklayer: Root: %x\n", baseRoot)
if data := rawdb.ReadAccountSnapshot(db, hash); data != nil {
account := new(Account)
if err := rlp.DecodeBytes(data, account); err != nil {
panic(err)
}
fmt.Printf("\taccount.nonce: %d\n", account.Nonce)
fmt.Printf("\taccount.balance: %x\n", account.Balance)
fmt.Printf("\taccount.root: %x\n", account.Root)
fmt.Printf("\taccount.codehash: %x\n", account.CodeHash)
}
// Check storage
{
it := rawdb.NewKeyLengthIterator(db.NewIterator(append(rawdb.SnapshotStoragePrefix, hash.Bytes()...), nil), 1+2*common.HashLength)
fmt.Printf("\tStorage:\n")
for it.Next() {
slot := it.Key()[33:]
fmt.Printf("\t\t%x: %x\n", slot, it.Value())
}
it.Release()
}
var depth = 0
return iterateJournal(db, func(pRoot, root common.Hash, destructs map[common.Hash]struct{}, accounts map[common.Hash][]byte, storage map[common.Hash]map[common.Hash][]byte) error {
_, a := accounts[hash]
_, b := destructs[hash]
_, c := storage[hash]
depth++
if !a && !b && !c {
return nil
}
return fmt.Errorf("load diff root: %v", err)
fmt.Printf("Disklayer+%d: Root: %x, parent %x\n", depth, root, pRoot)
if data, ok := accounts[hash]; ok {
account := new(Account)
if err := rlp.DecodeBytes(data, account); err != nil {
panic(err)
}
var destructs []journalDestruct
if err := r.Decode(&destructs); err != nil {
return fmt.Errorf("load diff destructs: %v", err)
fmt.Printf("\taccount.nonce: %d\n", account.Nonce)
fmt.Printf("\taccount.balance: %x\n", account.Balance)
fmt.Printf("\taccount.root: %x\n", account.Root)
fmt.Printf("\taccount.codehash: %x\n", account.CodeHash)
}
var accounts []journalAccount
if err := r.Decode(&accounts); err != nil {
return fmt.Errorf("load diff accounts: %v", err)
}
accountData := make(map[common.Hash][]byte)
for _, entry := range accounts {
if len(entry.Blob) > 0 { // RLP loses nil-ness, but `[]byte{}` is not a valid item, so reinterpret that
accountData[entry.Hash] = entry.Blob
} else {
accountData[entry.Hash] = nil
}
}
var storage []journalStorage
if err := r.Decode(&storage); err != nil {
return fmt.Errorf("load diff storage: %v", err)
}
for _, entry := range storage {
if _, ok := accountData[entry.Hash]; !ok {
log.Error("Dangling storage - missing account", "account", fmt.Sprintf("%#x", entry.Hash), "root", root)
return fmt.Errorf("dangling journal snapshot storage account %#x", entry.Hash)
if _, ok := destructs[hash]; ok {
fmt.Printf("\t Destructed!")
}
if data, ok := storage[hash]; ok {
fmt.Printf("\tStorage\n")
for k, v := range data {
fmt.Printf("\t\t%x: %x\n", k, v)
}
}
return nil
})
}