forked from cerc-io/plugeth
e04d63ebd3
This PR fixes an issue which might result in data lost in freezer. Whenever mutation happens in freezer, all data will be written into head data file and it will be rotated with a new one in case the size of file reaches the threshold. Theoretically, the rotated old data file should be fsync'd to prevent data loss. In freezer.Sync function, we only fsync: (1) index file (2) meta file and (3) head data file. So this PR forcibly fsync the head data file if mutation happens in the boundary of data file.
410 lines
11 KiB
Go
410 lines
11 KiB
Go
// Copyright 2021 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package rawdb
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import (
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"bytes"
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"errors"
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"fmt"
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"math/big"
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"math/rand"
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"os"
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"path"
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"sync"
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"testing"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/stretchr/testify/require"
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)
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var freezerTestTableDef = map[string]bool{"test": true}
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func TestFreezerModify(t *testing.T) {
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t.Parallel()
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// Create test data.
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var valuesRaw [][]byte
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var valuesRLP []*big.Int
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for x := 0; x < 100; x++ {
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v := getChunk(256, x)
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valuesRaw = append(valuesRaw, v)
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iv := big.NewInt(int64(x))
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iv = iv.Exp(iv, iv, nil)
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valuesRLP = append(valuesRLP, iv)
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}
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tables := map[string]bool{"raw": true, "rlp": false}
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f, _ := newFreezerForTesting(t, tables)
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defer f.Close()
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// Commit test data.
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_, err := f.ModifyAncients(func(op ethdb.AncientWriteOp) error {
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for i := range valuesRaw {
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if err := op.AppendRaw("raw", uint64(i), valuesRaw[i]); err != nil {
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return err
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}
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if err := op.Append("rlp", uint64(i), valuesRLP[i]); err != nil {
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return err
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}
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}
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return nil
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})
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if err != nil {
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t.Fatal("ModifyAncients failed:", err)
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}
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// Dump indexes.
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for _, table := range f.tables {
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t.Log(table.name, "index:", table.dumpIndexString(0, int64(len(valuesRaw))))
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}
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// Read back test data.
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checkAncientCount(t, f, "raw", uint64(len(valuesRaw)))
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checkAncientCount(t, f, "rlp", uint64(len(valuesRLP)))
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for i := range valuesRaw {
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v, _ := f.Ancient("raw", uint64(i))
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if !bytes.Equal(v, valuesRaw[i]) {
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t.Fatalf("wrong raw value at %d: %x", i, v)
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}
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ivEnc, _ := f.Ancient("rlp", uint64(i))
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want, _ := rlp.EncodeToBytes(valuesRLP[i])
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if !bytes.Equal(ivEnc, want) {
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t.Fatalf("wrong RLP value at %d: %x", i, ivEnc)
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}
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}
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}
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// This checks that ModifyAncients rolls back freezer updates
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// when the function passed to it returns an error.
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func TestFreezerModifyRollback(t *testing.T) {
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t.Parallel()
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f, dir := newFreezerForTesting(t, freezerTestTableDef)
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theError := errors.New("oops")
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_, err := f.ModifyAncients(func(op ethdb.AncientWriteOp) error {
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// Append three items. This creates two files immediately,
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// because the table size limit of the test freezer is 2048.
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require.NoError(t, op.AppendRaw("test", 0, make([]byte, 2048)))
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require.NoError(t, op.AppendRaw("test", 1, make([]byte, 2048)))
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require.NoError(t, op.AppendRaw("test", 2, make([]byte, 2048)))
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return theError
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})
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if err != theError {
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t.Errorf("ModifyAncients returned wrong error %q", err)
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}
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checkAncientCount(t, f, "test", 0)
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f.Close()
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// Reopen and check that the rolled-back data doesn't reappear.
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tables := map[string]bool{"test": true}
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f2, err := NewFreezer(dir, "", false, 2049, tables)
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if err != nil {
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t.Fatalf("can't reopen freezer after failed ModifyAncients: %v", err)
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}
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defer f2.Close()
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checkAncientCount(t, f2, "test", 0)
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}
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// This test runs ModifyAncients and Ancient concurrently with each other.
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func TestFreezerConcurrentModifyRetrieve(t *testing.T) {
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t.Parallel()
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f, _ := newFreezerForTesting(t, freezerTestTableDef)
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defer f.Close()
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var (
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numReaders = 5
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writeBatchSize = uint64(50)
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written = make(chan uint64, numReaders*6)
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wg sync.WaitGroup
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)
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wg.Add(numReaders + 1)
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// Launch the writer. It appends 10000 items in batches.
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go func() {
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defer wg.Done()
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defer close(written)
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for item := uint64(0); item < 10000; item += writeBatchSize {
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_, err := f.ModifyAncients(func(op ethdb.AncientWriteOp) error {
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for i := uint64(0); i < writeBatchSize; i++ {
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item := item + i
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value := getChunk(32, int(item))
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if err := op.AppendRaw("test", item, value); err != nil {
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return err
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}
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}
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return nil
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})
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if err != nil {
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panic(err)
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}
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for i := 0; i < numReaders; i++ {
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written <- item + writeBatchSize
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}
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}
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}()
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// Launch the readers. They read random items from the freezer up to the
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// current frozen item count.
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for i := 0; i < numReaders; i++ {
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go func() {
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defer wg.Done()
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for frozen := range written {
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for rc := 0; rc < 80; rc++ {
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num := uint64(rand.Intn(int(frozen)))
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value, err := f.Ancient("test", num)
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if err != nil {
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panic(fmt.Errorf("error reading %d (frozen %d): %v", num, frozen, err))
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}
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if !bytes.Equal(value, getChunk(32, int(num))) {
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panic(fmt.Errorf("wrong value at %d", num))
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}
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}
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}
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}()
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}
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wg.Wait()
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}
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// This test runs ModifyAncients and TruncateHead concurrently with each other.
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func TestFreezerConcurrentModifyTruncate(t *testing.T) {
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f, _ := newFreezerForTesting(t, freezerTestTableDef)
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defer f.Close()
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var item = make([]byte, 256)
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for i := 0; i < 10; i++ {
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// First reset and write 100 items.
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if err := f.TruncateHead(0); err != nil {
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t.Fatal("truncate failed:", err)
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}
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_, err := f.ModifyAncients(func(op ethdb.AncientWriteOp) error {
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for i := uint64(0); i < 100; i++ {
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if err := op.AppendRaw("test", i, item); err != nil {
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return err
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}
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}
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return nil
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})
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if err != nil {
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t.Fatal("modify failed:", err)
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}
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checkAncientCount(t, f, "test", 100)
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// Now append 100 more items and truncate concurrently.
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var (
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wg sync.WaitGroup
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truncateErr error
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modifyErr error
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)
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wg.Add(3)
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go func() {
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_, modifyErr = f.ModifyAncients(func(op ethdb.AncientWriteOp) error {
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for i := uint64(100); i < 200; i++ {
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if err := op.AppendRaw("test", i, item); err != nil {
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return err
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}
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}
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return nil
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})
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wg.Done()
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}()
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go func() {
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truncateErr = f.TruncateHead(10)
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wg.Done()
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}()
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go func() {
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f.AncientSize("test")
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wg.Done()
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}()
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wg.Wait()
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// Now check the outcome. If the truncate operation went through first, the append
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// fails, otherwise it succeeds. In either case, the freezer should be positioned
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// at 10 after both operations are done.
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if truncateErr != nil {
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t.Fatal("concurrent truncate failed:", err)
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}
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if !(errors.Is(modifyErr, nil) || errors.Is(modifyErr, errOutOrderInsertion)) {
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t.Fatal("wrong error from concurrent modify:", modifyErr)
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}
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checkAncientCount(t, f, "test", 10)
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}
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}
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func TestFreezerReadonlyValidate(t *testing.T) {
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tables := map[string]bool{"a": true, "b": true}
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dir := t.TempDir()
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// Open non-readonly freezer and fill individual tables
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// with different amount of data.
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f, err := NewFreezer(dir, "", false, 2049, tables)
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if err != nil {
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t.Fatal("can't open freezer", err)
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}
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var item = make([]byte, 1024)
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aBatch := f.tables["a"].newBatch()
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require.NoError(t, aBatch.AppendRaw(0, item))
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require.NoError(t, aBatch.AppendRaw(1, item))
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require.NoError(t, aBatch.AppendRaw(2, item))
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require.NoError(t, aBatch.commit())
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bBatch := f.tables["b"].newBatch()
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require.NoError(t, bBatch.AppendRaw(0, item))
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require.NoError(t, bBatch.commit())
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if f.tables["a"].items != 3 {
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t.Fatalf("unexpected number of items in table")
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}
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if f.tables["b"].items != 1 {
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t.Fatalf("unexpected number of items in table")
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}
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require.NoError(t, f.Close())
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// Re-openening as readonly should fail when validating
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// table lengths.
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_, err = NewFreezer(dir, "", true, 2049, tables)
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if err == nil {
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t.Fatal("readonly freezer should fail with differing table lengths")
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}
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}
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func newFreezerForTesting(t *testing.T, tables map[string]bool) (*Freezer, string) {
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t.Helper()
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dir := t.TempDir()
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// note: using low max table size here to ensure the tests actually
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// switch between multiple files.
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f, err := NewFreezer(dir, "", false, 2049, tables)
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if err != nil {
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t.Fatal("can't open freezer", err)
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}
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return f, dir
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}
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// checkAncientCount verifies that the freezer contains n items.
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func checkAncientCount(t *testing.T, f *Freezer, kind string, n uint64) {
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t.Helper()
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if frozen, _ := f.Ancients(); frozen != n {
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t.Fatalf("Ancients() returned %d, want %d", frozen, n)
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}
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// Check at index n-1.
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if n > 0 {
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index := n - 1
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if ok, _ := f.HasAncient(kind, index); !ok {
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t.Errorf("HasAncient(%q, %d) returned false unexpectedly", kind, index)
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}
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if _, err := f.Ancient(kind, index); err != nil {
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t.Errorf("Ancient(%q, %d) returned unexpected error %q", kind, index, err)
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}
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}
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// Check at index n.
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index := n
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if ok, _ := f.HasAncient(kind, index); ok {
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t.Errorf("HasAncient(%q, %d) returned true unexpectedly", kind, index)
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}
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if _, err := f.Ancient(kind, index); err == nil {
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t.Errorf("Ancient(%q, %d) didn't return expected error", kind, index)
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} else if err != errOutOfBounds {
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t.Errorf("Ancient(%q, %d) returned unexpected error %q", kind, index, err)
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}
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}
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func TestRenameWindows(t *testing.T) {
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var (
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fname = "file.bin"
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fname2 = "file2.bin"
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data = []byte{1, 2, 3, 4}
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data2 = []byte{2, 3, 4, 5}
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data3 = []byte{3, 5, 6, 7}
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dataLen = 4
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)
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// Create 2 temp dirs
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dir1 := t.TempDir()
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dir2 := t.TempDir()
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// Create file in dir1 and fill with data
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f, err := os.Create(path.Join(dir1, fname))
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if err != nil {
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t.Fatal(err)
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}
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f2, err := os.Create(path.Join(dir1, fname2))
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if err != nil {
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t.Fatal(err)
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}
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f3, err := os.Create(path.Join(dir2, fname2))
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if err != nil {
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t.Fatal(err)
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}
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if _, err := f.Write(data); err != nil {
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t.Fatal(err)
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}
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if _, err := f2.Write(data2); err != nil {
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t.Fatal(err)
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}
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if _, err := f3.Write(data3); err != nil {
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t.Fatal(err)
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}
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if err := f.Close(); err != nil {
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t.Fatal(err)
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}
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if err := f2.Close(); err != nil {
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t.Fatal(err)
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}
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if err := f3.Close(); err != nil {
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t.Fatal(err)
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}
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if err := os.Rename(f.Name(), path.Join(dir2, fname)); err != nil {
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t.Fatal(err)
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}
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if err := os.Rename(f2.Name(), path.Join(dir2, fname2)); err != nil {
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t.Fatal(err)
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}
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// Check file contents
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f, err = os.Open(path.Join(dir2, fname))
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if err != nil {
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t.Fatal(err)
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}
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defer f.Close()
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defer os.Remove(f.Name())
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buf := make([]byte, dataLen)
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if _, err := f.Read(buf); err != nil {
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t.Fatal(err)
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}
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if !bytes.Equal(buf, data) {
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t.Errorf("unexpected file contents. Got %v\n", buf)
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}
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f, err = os.Open(path.Join(dir2, fname2))
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if err != nil {
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t.Fatal(err)
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}
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defer f.Close()
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defer os.Remove(f.Name())
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if _, err := f.Read(buf); err != nil {
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t.Fatal(err)
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}
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if !bytes.Equal(buf, data2) {
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t.Errorf("unexpected file contents. Got %v\n", buf)
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}
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}
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