plugeth/eth/backend.go
Felix Lange 56ed6152a1 core, eth, miner: improve shutdown synchronisation
Shutting down geth prints hundreds of annoying error messages in some
cases. The errors appear because the Stop method of eth.ProtocolManager,
miner.Miner and core.TxPool is asynchronous. Left over peer sessions
generate events which are processed after Stop even though the database
has already been closed.

The fix is to make Stop synchronous using sync.WaitGroup.

For eth.ProtocolManager, in order to make use of WaitGroup safe, we need
a way to stop new peer sessions from being added while waiting on the
WaitGroup. The eth protocol Run function now selects on a signaling
channel and adds to the WaitGroup only if ProtocolManager is not
shutting down.

For miner.worker and core.TxPool the number of goroutines is static,
WaitGroup can be used in the usual way without additional
synchronisation.
2016-05-09 13:03:08 +02:00

628 lines
19 KiB
Go

// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// Package eth implements the Ethereum protocol.
package eth
import (
"bytes"
"errors"
"fmt"
"math/big"
"os"
"path/filepath"
"regexp"
"strings"
"time"
"github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/accounts"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/compiler"
"github.com/ethereum/go-ethereum/common/httpclient"
"github.com/ethereum/go-ethereum/common/registrar/ethreg"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/eth/downloader"
"github.com/ethereum/go-ethereum/eth/filters"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/miner"
"github.com/ethereum/go-ethereum/node"
"github.com/ethereum/go-ethereum/p2p"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/rpc"
)
const (
epochLength = 30000
ethashRevision = 23
autoDAGcheckInterval = 10 * time.Hour
autoDAGepochHeight = epochLength / 2
)
var (
datadirInUseErrnos = map[uint]bool{11: true, 32: true, 35: true}
portInUseErrRE = regexp.MustCompile("address already in use")
)
type Config struct {
ChainConfig *core.ChainConfig // chain configuration
NetworkId int // Network ID to use for selecting peers to connect to
Genesis string // Genesis JSON to seed the chain database with
FastSync bool // Enables the state download based fast synchronisation algorithm
BlockChainVersion int
SkipBcVersionCheck bool // e.g. blockchain export
DatabaseCache int
DatabaseHandles int
NatSpec bool
DocRoot string
AutoDAG bool
PowTest bool
PowShared bool
ExtraData []byte
AccountManager *accounts.Manager
Etherbase common.Address
GasPrice *big.Int
MinerThreads int
SolcPath string
GpoMinGasPrice *big.Int
GpoMaxGasPrice *big.Int
GpoFullBlockRatio int
GpobaseStepDown int
GpobaseStepUp int
GpobaseCorrectionFactor int
EnableJit bool
ForceJit bool
TestGenesisBlock *types.Block // Genesis block to seed the chain database with (testing only!)
TestGenesisState ethdb.Database // Genesis state to seed the database with (testing only!)
}
type Ethereum struct {
chainConfig *core.ChainConfig
// Channel for shutting down the ethereum
shutdownChan chan bool
// DB interfaces
chainDb ethdb.Database // Block chain database
dappDb ethdb.Database // Dapp database
// Handlers
txPool *core.TxPool
blockchain *core.BlockChain
accountManager *accounts.Manager
pow *ethash.Ethash
protocolManager *ProtocolManager
SolcPath string
solc *compiler.Solidity
gpo *GasPriceOracle
GpoMinGasPrice *big.Int
GpoMaxGasPrice *big.Int
GpoFullBlockRatio int
GpobaseStepDown int
GpobaseStepUp int
GpobaseCorrectionFactor int
httpclient *httpclient.HTTPClient
eventMux *event.TypeMux
miner *miner.Miner
Mining bool
MinerThreads int
NatSpec bool
AutoDAG bool
PowTest bool
autodagquit chan bool
etherbase common.Address
netVersionId int
netRPCService *PublicNetAPI
}
func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
// Open the chain database and perform any upgrades needed
chainDb, err := ctx.OpenDatabase("chaindata", config.DatabaseCache, config.DatabaseHandles)
if err != nil {
return nil, err
}
if db, ok := chainDb.(*ethdb.LDBDatabase); ok {
db.Meter("eth/db/chaindata/")
}
if err := upgradeChainDatabase(chainDb); err != nil {
return nil, err
}
if err := addMipmapBloomBins(chainDb); err != nil {
return nil, err
}
dappDb, err := ctx.OpenDatabase("dapp", config.DatabaseCache, config.DatabaseHandles)
if err != nil {
return nil, err
}
if db, ok := dappDb.(*ethdb.LDBDatabase); ok {
db.Meter("eth/db/dapp/")
}
glog.V(logger.Info).Infof("Protocol Versions: %v, Network Id: %v", ProtocolVersions, config.NetworkId)
// Load up any custom genesis block if requested
if len(config.Genesis) > 0 {
block, err := core.WriteGenesisBlock(chainDb, strings.NewReader(config.Genesis))
if err != nil {
return nil, err
}
glog.V(logger.Info).Infof("Successfully wrote custom genesis block: %x", block.Hash())
}
// Load up a test setup if directly injected
if config.TestGenesisState != nil {
chainDb = config.TestGenesisState
}
if config.TestGenesisBlock != nil {
core.WriteTd(chainDb, config.TestGenesisBlock.Hash(), config.TestGenesisBlock.Difficulty())
core.WriteBlock(chainDb, config.TestGenesisBlock)
core.WriteCanonicalHash(chainDb, config.TestGenesisBlock.Hash(), config.TestGenesisBlock.NumberU64())
core.WriteHeadBlockHash(chainDb, config.TestGenesisBlock.Hash())
}
if !config.SkipBcVersionCheck {
bcVersion := core.GetBlockChainVersion(chainDb)
if bcVersion != config.BlockChainVersion && bcVersion != 0 {
return nil, fmt.Errorf("Blockchain DB version mismatch (%d / %d). Run geth upgradedb.\n", bcVersion, config.BlockChainVersion)
}
core.WriteBlockChainVersion(chainDb, config.BlockChainVersion)
}
glog.V(logger.Info).Infof("Blockchain DB Version: %d", config.BlockChainVersion)
eth := &Ethereum{
shutdownChan: make(chan bool),
chainDb: chainDb,
dappDb: dappDb,
eventMux: ctx.EventMux,
accountManager: config.AccountManager,
etherbase: config.Etherbase,
netVersionId: config.NetworkId,
NatSpec: config.NatSpec,
MinerThreads: config.MinerThreads,
SolcPath: config.SolcPath,
AutoDAG: config.AutoDAG,
PowTest: config.PowTest,
GpoMinGasPrice: config.GpoMinGasPrice,
GpoMaxGasPrice: config.GpoMaxGasPrice,
GpoFullBlockRatio: config.GpoFullBlockRatio,
GpobaseStepDown: config.GpobaseStepDown,
GpobaseStepUp: config.GpobaseStepUp,
GpobaseCorrectionFactor: config.GpobaseCorrectionFactor,
httpclient: httpclient.New(config.DocRoot),
}
switch {
case config.PowTest:
glog.V(logger.Info).Infof("ethash used in test mode")
eth.pow, err = ethash.NewForTesting()
if err != nil {
return nil, err
}
case config.PowShared:
glog.V(logger.Info).Infof("ethash used in shared mode")
eth.pow = ethash.NewShared()
default:
eth.pow = ethash.New()
}
// load the genesis block or write a new one if no genesis
// block is prenent in the database.
genesis := core.GetBlock(chainDb, core.GetCanonicalHash(chainDb, 0))
if genesis == nil {
genesis, err = core.WriteDefaultGenesisBlock(chainDb)
if err != nil {
return nil, err
}
glog.V(logger.Info).Infoln("WARNING: Wrote default ethereum genesis block")
}
if config.ChainConfig == nil {
return nil, errors.New("missing chain config")
}
eth.chainConfig = config.ChainConfig
eth.chainConfig.VmConfig = vm.Config{
EnableJit: config.EnableJit,
ForceJit: config.ForceJit,
}
eth.blockchain, err = core.NewBlockChain(chainDb, eth.chainConfig, eth.pow, eth.EventMux())
if err != nil {
if err == core.ErrNoGenesis {
return nil, fmt.Errorf(`No chain found. Please initialise a new chain using the "init" subcommand.`)
}
return nil, err
}
eth.gpo = NewGasPriceOracle(eth)
newPool := core.NewTxPool(eth.chainConfig, eth.EventMux(), eth.blockchain.State, eth.blockchain.GasLimit)
eth.txPool = newPool
if eth.protocolManager, err = NewProtocolManager(eth.chainConfig, config.FastSync, config.NetworkId, eth.eventMux, eth.txPool, eth.pow, eth.blockchain, chainDb); err != nil {
return nil, err
}
eth.miner = miner.New(eth, eth.chainConfig, eth.EventMux(), eth.pow)
eth.miner.SetGasPrice(config.GasPrice)
eth.miner.SetExtra(config.ExtraData)
return eth, nil
}
// APIs returns the collection of RPC services the ethereum package offers.
// NOTE, some of these services probably need to be moved to somewhere else.
func (s *Ethereum) APIs() []rpc.API {
return []rpc.API{
{
Namespace: "eth",
Version: "1.0",
Service: NewPublicEthereumAPI(s),
Public: true,
}, {
Namespace: "eth",
Version: "1.0",
Service: NewPublicAccountAPI(s.accountManager),
Public: true,
}, {
Namespace: "personal",
Version: "1.0",
Service: NewPrivateAccountAPI(s.accountManager),
Public: false,
}, {
Namespace: "eth",
Version: "1.0",
Service: NewPublicBlockChainAPI(s.chainConfig, s.blockchain, s.miner, s.chainDb, s.gpo, s.eventMux, s.accountManager),
Public: true,
}, {
Namespace: "eth",
Version: "1.0",
Service: NewPublicTransactionPoolAPI(s),
Public: true,
}, {
Namespace: "eth",
Version: "1.0",
Service: NewPublicMinerAPI(s),
Public: true,
}, {
Namespace: "eth",
Version: "1.0",
Service: downloader.NewPublicDownloaderAPI(s.protocolManager.downloader, s.eventMux),
Public: true,
}, {
Namespace: "miner",
Version: "1.0",
Service: NewPrivateMinerAPI(s),
Public: false,
}, {
Namespace: "txpool",
Version: "1.0",
Service: NewPublicTxPoolAPI(s),
Public: true,
}, {
Namespace: "eth",
Version: "1.0",
Service: filters.NewPublicFilterAPI(s.chainDb, s.eventMux),
Public: true,
}, {
Namespace: "admin",
Version: "1.0",
Service: NewPrivateAdminAPI(s),
}, {
Namespace: "debug",
Version: "1.0",
Service: NewPublicDebugAPI(s),
Public: true,
}, {
Namespace: "debug",
Version: "1.0",
Service: NewPrivateDebugAPI(s.chainConfig, s),
}, {
Namespace: "net",
Version: "1.0",
Service: s.netRPCService,
Public: true,
}, {
Namespace: "admin",
Version: "1.0",
Service: ethreg.NewPrivateRegistarAPI(s.chainConfig, s.blockchain, s.chainDb, s.txPool, s.accountManager),
},
}
}
func (s *Ethereum) ResetWithGenesisBlock(gb *types.Block) {
s.blockchain.ResetWithGenesisBlock(gb)
}
func (s *Ethereum) Etherbase() (eb common.Address, err error) {
eb = s.etherbase
if (eb == common.Address{}) {
firstAccount, err := s.AccountManager().AccountByIndex(0)
eb = firstAccount.Address
if err != nil {
return eb, fmt.Errorf("etherbase address must be explicitly specified")
}
}
return eb, nil
}
// set in js console via admin interface or wrapper from cli flags
func (self *Ethereum) SetEtherbase(etherbase common.Address) {
self.etherbase = etherbase
self.miner.SetEtherbase(etherbase)
}
func (s *Ethereum) StopMining() { s.miner.Stop() }
func (s *Ethereum) IsMining() bool { return s.miner.Mining() }
func (s *Ethereum) Miner() *miner.Miner { return s.miner }
func (s *Ethereum) AccountManager() *accounts.Manager { return s.accountManager }
func (s *Ethereum) BlockChain() *core.BlockChain { return s.blockchain }
func (s *Ethereum) TxPool() *core.TxPool { return s.txPool }
func (s *Ethereum) EventMux() *event.TypeMux { return s.eventMux }
func (s *Ethereum) ChainDb() ethdb.Database { return s.chainDb }
func (s *Ethereum) DappDb() ethdb.Database { return s.dappDb }
func (s *Ethereum) IsListening() bool { return true } // Always listening
func (s *Ethereum) EthVersion() int { return int(s.protocolManager.SubProtocols[0].Version) }
func (s *Ethereum) NetVersion() int { return s.netVersionId }
func (s *Ethereum) Downloader() *downloader.Downloader { return s.protocolManager.downloader }
// Protocols implements node.Service, returning all the currently configured
// network protocols to start.
func (s *Ethereum) Protocols() []p2p.Protocol {
return s.protocolManager.SubProtocols
}
// Start implements node.Service, starting all internal goroutines needed by the
// Ethereum protocol implementation.
func (s *Ethereum) Start(srvr *p2p.Server) error {
if s.AutoDAG {
s.StartAutoDAG()
}
s.protocolManager.Start()
s.netRPCService = NewPublicNetAPI(srvr, s.NetVersion())
return nil
}
// Stop implements node.Service, terminating all internal goroutines used by the
// Ethereum protocol.
func (s *Ethereum) Stop() error {
s.blockchain.Stop()
s.protocolManager.Stop()
s.txPool.Stop()
s.miner.Stop()
s.eventMux.Stop()
s.StopAutoDAG()
s.chainDb.Close()
s.dappDb.Close()
close(s.shutdownChan)
return nil
}
// This function will wait for a shutdown and resumes main thread execution
func (s *Ethereum) WaitForShutdown() {
<-s.shutdownChan
}
// StartAutoDAG() spawns a go routine that checks the DAG every autoDAGcheckInterval
// by default that is 10 times per epoch
// in epoch n, if we past autoDAGepochHeight within-epoch blocks,
// it calls ethash.MakeDAG to pregenerate the DAG for the next epoch n+1
// if it does not exist yet as well as remove the DAG for epoch n-1
// the loop quits if autodagquit channel is closed, it can safely restart and
// stop any number of times.
// For any more sophisticated pattern of DAG generation, use CLI subcommand
// makedag
func (self *Ethereum) StartAutoDAG() {
if self.autodagquit != nil {
return // already started
}
go func() {
glog.V(logger.Info).Infof("Automatic pregeneration of ethash DAG ON (ethash dir: %s)", ethash.DefaultDir)
var nextEpoch uint64
timer := time.After(0)
self.autodagquit = make(chan bool)
for {
select {
case <-timer:
glog.V(logger.Info).Infof("checking DAG (ethash dir: %s)", ethash.DefaultDir)
currentBlock := self.BlockChain().CurrentBlock().NumberU64()
thisEpoch := currentBlock / epochLength
if nextEpoch <= thisEpoch {
if currentBlock%epochLength > autoDAGepochHeight {
if thisEpoch > 0 {
previousDag, previousDagFull := dagFiles(thisEpoch - 1)
os.Remove(filepath.Join(ethash.DefaultDir, previousDag))
os.Remove(filepath.Join(ethash.DefaultDir, previousDagFull))
glog.V(logger.Info).Infof("removed DAG for epoch %d (%s)", thisEpoch-1, previousDag)
}
nextEpoch = thisEpoch + 1
dag, _ := dagFiles(nextEpoch)
if _, err := os.Stat(dag); os.IsNotExist(err) {
glog.V(logger.Info).Infof("Pregenerating DAG for epoch %d (%s)", nextEpoch, dag)
err := ethash.MakeDAG(nextEpoch*epochLength, "") // "" -> ethash.DefaultDir
if err != nil {
glog.V(logger.Error).Infof("Error generating DAG for epoch %d (%s)", nextEpoch, dag)
return
}
} else {
glog.V(logger.Error).Infof("DAG for epoch %d (%s)", nextEpoch, dag)
}
}
}
timer = time.After(autoDAGcheckInterval)
case <-self.autodagquit:
return
}
}
}()
}
// stopAutoDAG stops automatic DAG pregeneration by quitting the loop
func (self *Ethereum) StopAutoDAG() {
if self.autodagquit != nil {
close(self.autodagquit)
self.autodagquit = nil
}
glog.V(logger.Info).Infof("Automatic pregeneration of ethash DAG OFF (ethash dir: %s)", ethash.DefaultDir)
}
// HTTPClient returns the light http client used for fetching offchain docs
// (natspec, source for verification)
func (self *Ethereum) HTTPClient() *httpclient.HTTPClient {
return self.httpclient
}
func (self *Ethereum) Solc() (*compiler.Solidity, error) {
var err error
if self.solc == nil {
self.solc, err = compiler.New(self.SolcPath)
}
return self.solc, err
}
// set in js console via admin interface or wrapper from cli flags
func (self *Ethereum) SetSolc(solcPath string) (*compiler.Solidity, error) {
self.SolcPath = solcPath
self.solc = nil
return self.Solc()
}
// dagFiles(epoch) returns the two alternative DAG filenames (not a path)
// 1) <revision>-<hex(seedhash[8])> 2) full-R<revision>-<hex(seedhash[8])>
func dagFiles(epoch uint64) (string, string) {
seedHash, _ := ethash.GetSeedHash(epoch * epochLength)
dag := fmt.Sprintf("full-R%d-%x", ethashRevision, seedHash[:8])
return dag, "full-R" + dag
}
// upgradeChainDatabase ensures that the chain database stores block split into
// separate header and body entries.
func upgradeChainDatabase(db ethdb.Database) error {
// Short circuit if the head block is stored already as separate header and body
data, err := db.Get([]byte("LastBlock"))
if err != nil {
return nil
}
head := common.BytesToHash(data)
if block := core.GetBlockByHashOld(db, head); block == nil {
return nil
}
// At least some of the database is still the old format, upgrade (skip the head block!)
glog.V(logger.Info).Info("Old database detected, upgrading...")
if db, ok := db.(*ethdb.LDBDatabase); ok {
blockPrefix := []byte("block-hash-")
for it := db.NewIterator(); it.Next(); {
// Skip anything other than a combined block
if !bytes.HasPrefix(it.Key(), blockPrefix) {
continue
}
// Skip the head block (merge last to signal upgrade completion)
if bytes.HasSuffix(it.Key(), head.Bytes()) {
continue
}
// Load the block, split and serialize (order!)
block := core.GetBlockByHashOld(db, common.BytesToHash(bytes.TrimPrefix(it.Key(), blockPrefix)))
if err := core.WriteTd(db, block.Hash(), block.DeprecatedTd()); err != nil {
return err
}
if err := core.WriteBody(db, block.Hash(), block.Body()); err != nil {
return err
}
if err := core.WriteHeader(db, block.Header()); err != nil {
return err
}
if err := db.Delete(it.Key()); err != nil {
return err
}
}
// Lastly, upgrade the head block, disabling the upgrade mechanism
current := core.GetBlockByHashOld(db, head)
if err := core.WriteTd(db, current.Hash(), current.DeprecatedTd()); err != nil {
return err
}
if err := core.WriteBody(db, current.Hash(), current.Body()); err != nil {
return err
}
if err := core.WriteHeader(db, current.Header()); err != nil {
return err
}
}
return nil
}
func addMipmapBloomBins(db ethdb.Database) (err error) {
const mipmapVersion uint = 2
// check if the version is set. We ignore data for now since there's
// only one version so we can easily ignore it for now
var data []byte
data, _ = db.Get([]byte("setting-mipmap-version"))
if len(data) > 0 {
var version uint
if err := rlp.DecodeBytes(data, &version); err == nil && version == mipmapVersion {
return nil
}
}
defer func() {
if err == nil {
var val []byte
val, err = rlp.EncodeToBytes(mipmapVersion)
if err == nil {
err = db.Put([]byte("setting-mipmap-version"), val)
}
return
}
}()
latestBlock := core.GetBlock(db, core.GetHeadBlockHash(db))
if latestBlock == nil { // clean database
return
}
tstart := time.Now()
glog.V(logger.Info).Infoln("upgrading db log bloom bins")
for i := uint64(0); i <= latestBlock.NumberU64(); i++ {
hash := core.GetCanonicalHash(db, i)
if (hash == common.Hash{}) {
return fmt.Errorf("chain db corrupted. Could not find block %d.", i)
}
core.WriteMipmapBloom(db, i, core.GetBlockReceipts(db, hash))
}
glog.V(logger.Info).Infoln("upgrade completed in", time.Since(tstart))
return nil
}