306 lines
9.7 KiB
Go
306 lines
9.7 KiB
Go
// Copyright 2016 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 les
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import (
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"crypto/ecdsa"
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"sync"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/mclock"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/eth"
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"github.com/ethereum/go-ethereum/les/flowcontrol"
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"github.com/ethereum/go-ethereum/light"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/discv5"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rpc"
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)
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const bufLimitRatio = 6000 // fixed bufLimit/MRR ratio
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type LesServer struct {
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lesCommons
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fcManager *flowcontrol.ClientManager // nil if our node is client only
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costTracker *costTracker
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defParams flowcontrol.ServerParams
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lesTopics []discv5.Topic
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privateKey *ecdsa.PrivateKey
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quitSync chan struct{}
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onlyAnnounce bool
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thcNormal, thcBlockProcessing int // serving thread count for normal operation and block processing mode
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maxPeers int
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freeClientCap uint64
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freeClientPool *freeClientPool
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priorityClientPool *priorityClientPool
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}
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func NewLesServer(eth *eth.Ethereum, config *eth.Config) (*LesServer, error) {
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quitSync := make(chan struct{})
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pm, err := NewProtocolManager(
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eth.BlockChain().Config(),
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light.DefaultServerIndexerConfig,
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false,
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config.NetworkId,
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eth.EventMux(),
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eth.Engine(),
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newPeerSet(),
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eth.BlockChain(),
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eth.TxPool(),
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eth.ChainDb(),
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nil,
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nil,
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nil,
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quitSync,
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new(sync.WaitGroup),
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config.ULC)
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if err != nil {
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return nil, err
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}
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lesTopics := make([]discv5.Topic, len(AdvertiseProtocolVersions))
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for i, pv := range AdvertiseProtocolVersions {
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lesTopics[i] = lesTopic(eth.BlockChain().Genesis().Hash(), pv)
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}
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srv := &LesServer{
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lesCommons: lesCommons{
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config: config,
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chainDb: eth.ChainDb(),
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iConfig: light.DefaultServerIndexerConfig,
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chtIndexer: light.NewChtIndexer(eth.ChainDb(), nil, params.CHTFrequencyServer, params.HelperTrieProcessConfirmations),
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bloomTrieIndexer: light.NewBloomTrieIndexer(eth.ChainDb(), nil, params.BloomBitsBlocks, params.BloomTrieFrequency),
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protocolManager: pm,
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},
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costTracker: newCostTracker(eth.ChainDb(), config),
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quitSync: quitSync,
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lesTopics: lesTopics,
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onlyAnnounce: config.OnlyAnnounce,
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}
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logger := log.New()
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pm.server = srv
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srv.thcNormal = config.LightServ * 4 / 100
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if srv.thcNormal < 4 {
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srv.thcNormal = 4
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}
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srv.thcBlockProcessing = config.LightServ/100 + 1
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srv.fcManager = flowcontrol.NewClientManager(nil, &mclock.System{})
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chtV1SectionCount, _, _ := srv.chtIndexer.Sections() // indexer still uses LES/1 4k section size for backwards server compatibility
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chtV2SectionCount := chtV1SectionCount / (params.CHTFrequencyClient / params.CHTFrequencyServer)
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if chtV2SectionCount != 0 {
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// convert to LES/2 section
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chtLastSection := chtV2SectionCount - 1
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// convert last LES/2 section index back to LES/1 index for chtIndexer.SectionHead
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chtLastSectionV1 := (chtLastSection+1)*(params.CHTFrequencyClient/params.CHTFrequencyServer) - 1
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chtSectionHead := srv.chtIndexer.SectionHead(chtLastSectionV1)
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chtRoot := light.GetChtRoot(pm.chainDb, chtLastSectionV1, chtSectionHead)
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logger.Info("Loaded CHT", "section", chtLastSection, "head", chtSectionHead, "root", chtRoot)
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}
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bloomTrieSectionCount, _, _ := srv.bloomTrieIndexer.Sections()
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if bloomTrieSectionCount != 0 {
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bloomTrieLastSection := bloomTrieSectionCount - 1
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bloomTrieSectionHead := srv.bloomTrieIndexer.SectionHead(bloomTrieLastSection)
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bloomTrieRoot := light.GetBloomTrieRoot(pm.chainDb, bloomTrieLastSection, bloomTrieSectionHead)
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logger.Info("Loaded bloom trie", "section", bloomTrieLastSection, "head", bloomTrieSectionHead, "root", bloomTrieRoot)
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}
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srv.chtIndexer.Start(eth.BlockChain())
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return srv, nil
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}
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func (s *LesServer) APIs() []rpc.API {
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return []rpc.API{
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{
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Namespace: "les",
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Version: "1.0",
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Service: NewPrivateLightServerAPI(s),
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Public: false,
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},
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}
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}
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// startEventLoop starts an event handler loop that updates the recharge curve of
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// the client manager and adjusts the client pool's size according to the total
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// capacity updates coming from the client manager
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func (s *LesServer) startEventLoop() {
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s.protocolManager.wg.Add(1)
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var processing bool
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blockProcFeed := make(chan bool, 100)
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s.protocolManager.blockchain.(*core.BlockChain).SubscribeBlockProcessingEvent(blockProcFeed)
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totalRechargeCh := make(chan uint64, 100)
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totalRecharge := s.costTracker.subscribeTotalRecharge(totalRechargeCh)
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totalCapacityCh := make(chan uint64, 100)
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updateRecharge := func() {
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if processing {
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s.protocolManager.servingQueue.setThreads(s.thcBlockProcessing)
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s.fcManager.SetRechargeCurve(flowcontrol.PieceWiseLinear{{0, 0}, {totalRecharge, totalRecharge}})
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} else {
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s.protocolManager.servingQueue.setThreads(s.thcNormal)
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s.fcManager.SetRechargeCurve(flowcontrol.PieceWiseLinear{{0, 0}, {totalRecharge / 10, totalRecharge}, {totalRecharge, totalRecharge}})
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}
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}
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updateRecharge()
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totalCapacity := s.fcManager.SubscribeTotalCapacity(totalCapacityCh)
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s.priorityClientPool.setLimits(s.maxPeers, totalCapacity)
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go func() {
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for {
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select {
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case processing = <-blockProcFeed:
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updateRecharge()
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case totalRecharge = <-totalRechargeCh:
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updateRecharge()
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case totalCapacity = <-totalCapacityCh:
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s.priorityClientPool.setLimits(s.maxPeers, totalCapacity)
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case <-s.protocolManager.quitSync:
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s.protocolManager.wg.Done()
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return
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}
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}
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}()
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}
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func (s *LesServer) Protocols() []p2p.Protocol {
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return s.makeProtocols(ServerProtocolVersions)
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}
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// Start starts the LES server
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func (s *LesServer) Start(srvr *p2p.Server) {
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s.maxPeers = s.config.LightPeers
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totalRecharge := s.costTracker.totalRecharge()
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if s.maxPeers > 0 {
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s.freeClientCap = minCapacity //totalRecharge / uint64(s.maxPeers)
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if s.freeClientCap < minCapacity {
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s.freeClientCap = minCapacity
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}
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if s.freeClientCap > 0 {
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s.defParams = flowcontrol.ServerParams{
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BufLimit: s.freeClientCap * bufLimitRatio,
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MinRecharge: s.freeClientCap,
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}
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}
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}
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freePeers := int(totalRecharge / s.freeClientCap)
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if freePeers < s.maxPeers {
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log.Warn("Light peer count limited", "specified", s.maxPeers, "allowed", freePeers)
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}
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s.freeClientPool = newFreeClientPool(s.chainDb, s.freeClientCap, 10000, mclock.System{}, func(id string) { go s.protocolManager.removePeer(id) })
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s.priorityClientPool = newPriorityClientPool(s.freeClientCap, s.protocolManager.peers, s.freeClientPool)
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s.protocolManager.peers.notify(s.priorityClientPool)
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s.startEventLoop()
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s.protocolManager.Start(s.config.LightPeers)
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if srvr.DiscV5 != nil {
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for _, topic := range s.lesTopics {
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topic := topic
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go func() {
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logger := log.New("topic", topic)
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logger.Info("Starting topic registration")
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defer logger.Info("Terminated topic registration")
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srvr.DiscV5.RegisterTopic(topic, s.quitSync)
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}()
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}
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}
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s.privateKey = srvr.PrivateKey
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s.protocolManager.blockLoop()
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}
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func (s *LesServer) SetBloomBitsIndexer(bloomIndexer *core.ChainIndexer) {
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bloomIndexer.AddChildIndexer(s.bloomTrieIndexer)
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}
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// Stop stops the LES service
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func (s *LesServer) Stop() {
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s.chtIndexer.Close()
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// bloom trie indexer is closed by parent bloombits indexer
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go func() {
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<-s.protocolManager.noMorePeers
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}()
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s.freeClientPool.stop()
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s.costTracker.stop()
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s.protocolManager.Stop()
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}
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func (pm *ProtocolManager) blockLoop() {
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pm.wg.Add(1)
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headCh := make(chan core.ChainHeadEvent, 10)
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headSub := pm.blockchain.SubscribeChainHeadEvent(headCh)
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go func() {
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var lastHead *types.Header
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lastBroadcastTd := common.Big0
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for {
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select {
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case ev := <-headCh:
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peers := pm.peers.AllPeers()
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if len(peers) > 0 {
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header := ev.Block.Header()
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hash := header.Hash()
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number := header.Number.Uint64()
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td := rawdb.ReadTd(pm.chainDb, hash, number)
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if td != nil && td.Cmp(lastBroadcastTd) > 0 {
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var reorg uint64
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if lastHead != nil {
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reorg = lastHead.Number.Uint64() - rawdb.FindCommonAncestor(pm.chainDb, header, lastHead).Number.Uint64()
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}
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lastHead = header
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lastBroadcastTd = td
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log.Debug("Announcing block to peers", "number", number, "hash", hash, "td", td, "reorg", reorg)
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announce := announceData{Hash: hash, Number: number, Td: td, ReorgDepth: reorg}
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var (
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signed bool
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signedAnnounce announceData
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)
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for _, p := range peers {
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p := p
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switch p.announceType {
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case announceTypeSimple:
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p.queueSend(func() { p.SendAnnounce(announce) })
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case announceTypeSigned:
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if !signed {
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signedAnnounce = announce
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signedAnnounce.sign(pm.server.privateKey)
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signed = true
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}
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p.queueSend(func() { p.SendAnnounce(signedAnnounce) })
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}
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}
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}
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}
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case <-pm.quitSync:
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headSub.Unsubscribe()
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pm.wg.Done()
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return
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}
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}
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}()
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}
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