You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
580 lines
16 KiB
580 lines
16 KiB
package v0
|
|
|
|
import (
|
|
"fmt"
|
|
"sync"
|
|
"time"
|
|
|
|
bc "github.com/tendermint/tendermint/blockchain"
|
|
"github.com/tendermint/tendermint/libs/log"
|
|
"github.com/tendermint/tendermint/libs/service"
|
|
"github.com/tendermint/tendermint/p2p"
|
|
bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
|
|
sm "github.com/tendermint/tendermint/state"
|
|
"github.com/tendermint/tendermint/store"
|
|
"github.com/tendermint/tendermint/types"
|
|
)
|
|
|
|
var (
|
|
_ service.Service = (*Reactor)(nil)
|
|
|
|
// ChannelShims contains a map of ChannelDescriptorShim objects, where each
|
|
// object wraps a reference to a legacy p2p ChannelDescriptor and the corresponding
|
|
// p2p proto.Message the new p2p Channel is responsible for handling.
|
|
//
|
|
//
|
|
// TODO: Remove once p2p refactor is complete.
|
|
// ref: https://github.com/tendermint/tendermint/issues/5670
|
|
ChannelShims = map[p2p.ChannelID]*p2p.ChannelDescriptorShim{
|
|
BlockchainChannel: {
|
|
MsgType: new(bcproto.Message),
|
|
Descriptor: &p2p.ChannelDescriptor{
|
|
ID: byte(BlockchainChannel),
|
|
Priority: 5,
|
|
SendQueueCapacity: 1000,
|
|
RecvBufferCapacity: 50 * 4096,
|
|
RecvMessageCapacity: bc.MaxMsgSize,
|
|
},
|
|
},
|
|
}
|
|
)
|
|
|
|
const (
|
|
// BlockchainChannel is a channel for blocks and status updates
|
|
BlockchainChannel = p2p.ChannelID(0x40)
|
|
|
|
trySyncIntervalMS = 10
|
|
|
|
// ask for best height every 10s
|
|
statusUpdateIntervalSeconds = 10
|
|
|
|
// check if we should switch to consensus reactor
|
|
switchToConsensusIntervalSeconds = 1
|
|
|
|
// switch to consensus after this duration of inactivity
|
|
syncTimeout = 60 * time.Second
|
|
)
|
|
|
|
type consensusReactor interface {
|
|
// For when we switch from blockchain reactor and fast sync to the consensus
|
|
// machine.
|
|
SwitchToConsensus(state sm.State, skipWAL bool)
|
|
}
|
|
|
|
type peerError struct {
|
|
err error
|
|
peerID p2p.NodeID
|
|
}
|
|
|
|
func (e peerError) Error() string {
|
|
return fmt.Sprintf("error with peer %v: %s", e.peerID, e.err.Error())
|
|
}
|
|
|
|
// BlockchainReactor handles long-term catchup syncing.
|
|
type Reactor struct {
|
|
service.BaseService
|
|
|
|
// immutable
|
|
initialState sm.State
|
|
|
|
blockExec *sm.BlockExecutor
|
|
store *store.BlockStore
|
|
pool *BlockPool
|
|
consReactor consensusReactor
|
|
fastSync bool
|
|
|
|
blockchainCh *p2p.Channel
|
|
peerUpdates *p2p.PeerUpdatesCh
|
|
closeCh chan struct{}
|
|
|
|
requestsCh <-chan BlockRequest
|
|
errorsCh <-chan peerError
|
|
|
|
// poolWG is used to synchronize the graceful shutdown of the poolRoutine and
|
|
// requestRoutine spawned goroutines when stopping the reactor and before
|
|
// stopping the p2p Channel(s).
|
|
poolWG sync.WaitGroup
|
|
}
|
|
|
|
// NewReactor returns new reactor instance.
|
|
func NewReactor(
|
|
logger log.Logger,
|
|
state sm.State,
|
|
blockExec *sm.BlockExecutor,
|
|
store *store.BlockStore,
|
|
consReactor consensusReactor,
|
|
blockchainCh *p2p.Channel,
|
|
peerUpdates *p2p.PeerUpdatesCh,
|
|
fastSync bool,
|
|
) (*Reactor, error) {
|
|
if state.LastBlockHeight != store.Height() {
|
|
return nil, fmt.Errorf("state (%v) and store (%v) height mismatch", state.LastBlockHeight, store.Height())
|
|
}
|
|
|
|
startHeight := store.Height() + 1
|
|
if startHeight == 1 {
|
|
startHeight = state.InitialHeight
|
|
}
|
|
|
|
requestsCh := make(chan BlockRequest, maxTotalRequesters)
|
|
errorsCh := make(chan peerError, maxPeerErrBuffer) // NOTE: The capacity should be larger than the peer count.
|
|
|
|
r := &Reactor{
|
|
initialState: state,
|
|
blockExec: blockExec,
|
|
store: store,
|
|
pool: NewBlockPool(startHeight, requestsCh, errorsCh),
|
|
consReactor: consReactor,
|
|
fastSync: fastSync,
|
|
requestsCh: requestsCh,
|
|
errorsCh: errorsCh,
|
|
blockchainCh: blockchainCh,
|
|
peerUpdates: peerUpdates,
|
|
closeCh: make(chan struct{}),
|
|
}
|
|
|
|
r.BaseService = *service.NewBaseService(logger, "Blockchain", r)
|
|
return r, nil
|
|
}
|
|
|
|
// OnStart starts separate go routines for each p2p Channel and listens for
|
|
// envelopes on each. In addition, it also listens for peer updates and handles
|
|
// messages on that p2p channel accordingly. The caller must be sure to execute
|
|
// OnStop to ensure the outbound p2p Channels are closed.
|
|
//
|
|
// If fastSync is enabled, we also start the pool and the pool processing
|
|
// goroutine. If the pool fails to start, an error is returned.
|
|
func (r *Reactor) OnStart() error {
|
|
if r.fastSync {
|
|
if err := r.pool.Start(); err != nil {
|
|
return err
|
|
}
|
|
|
|
r.poolWG.Add(1)
|
|
go r.poolRoutine(false)
|
|
}
|
|
|
|
go r.processBlockchainCh()
|
|
go r.processPeerUpdates()
|
|
|
|
return nil
|
|
}
|
|
|
|
// OnStop stops the reactor by signaling to all spawned goroutines to exit and
|
|
// blocking until they all exit.
|
|
func (r *Reactor) OnStop() {
|
|
if r.fastSync {
|
|
if err := r.pool.Stop(); err != nil {
|
|
r.Logger.Error("failed to stop pool", "err", err)
|
|
}
|
|
}
|
|
|
|
// wait for the poolRoutine and requestRoutine goroutines to gracefully exit
|
|
r.poolWG.Wait()
|
|
|
|
// Close closeCh to signal to all spawned goroutines to gracefully exit. All
|
|
// p2p Channels should execute Close().
|
|
close(r.closeCh)
|
|
|
|
// Wait for all p2p Channels to be closed before returning. This ensures we
|
|
// can easily reason about synchronization of all p2p Channels and ensure no
|
|
// panics will occur.
|
|
<-r.blockchainCh.Done()
|
|
<-r.peerUpdates.Done()
|
|
}
|
|
|
|
// respondToPeer loads a block and sends it to the requesting peer, if we have it.
|
|
// Otherwise, we'll respond saying we do not have it.
|
|
func (r *Reactor) respondToPeer(msg *bcproto.BlockRequest, peerID p2p.NodeID) {
|
|
block := r.store.LoadBlock(msg.Height)
|
|
if block != nil {
|
|
blockProto, err := block.ToProto()
|
|
if err != nil {
|
|
r.Logger.Error("failed to convert msg to protobuf", "err", err)
|
|
return
|
|
}
|
|
|
|
r.blockchainCh.Out() <- p2p.Envelope{
|
|
To: peerID,
|
|
Message: &bcproto.BlockResponse{Block: blockProto},
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
r.Logger.Info("peer requesting a block we do not have", "peer", peerID, "height", msg.Height)
|
|
r.blockchainCh.Out() <- p2p.Envelope{
|
|
To: peerID,
|
|
Message: &bcproto.NoBlockResponse{Height: msg.Height},
|
|
}
|
|
}
|
|
|
|
// handleBlockchainMessage handles envelopes sent from peers on the
|
|
// BlockchainChannel. It returns an error only if the Envelope.Message is unknown
|
|
// for this channel. This should never be called outside of handleMessage.
|
|
func (r *Reactor) handleBlockchainMessage(envelope p2p.Envelope) error {
|
|
logger := r.Logger.With("peer", envelope.From)
|
|
|
|
switch msg := envelope.Message.(type) {
|
|
case *bcproto.BlockRequest:
|
|
r.respondToPeer(msg, envelope.From)
|
|
|
|
case *bcproto.BlockResponse:
|
|
block, err := types.BlockFromProto(msg.Block)
|
|
if err != nil {
|
|
logger.Error("failed to convert block from proto", "err", err)
|
|
return err
|
|
}
|
|
|
|
r.pool.AddBlock(envelope.From, block, block.Size())
|
|
|
|
case *bcproto.StatusRequest:
|
|
r.blockchainCh.Out() <- p2p.Envelope{
|
|
To: envelope.From,
|
|
Message: &bcproto.StatusResponse{
|
|
Height: r.store.Height(),
|
|
Base: r.store.Base(),
|
|
},
|
|
}
|
|
|
|
case *bcproto.StatusResponse:
|
|
r.pool.SetPeerRange(envelope.From, msg.Base, msg.Height)
|
|
|
|
case *bcproto.NoBlockResponse:
|
|
logger.Debug("peer does not have the requested block", "height", msg.Height)
|
|
|
|
default:
|
|
return fmt.Errorf("received unknown message: %T", msg)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// handleMessage handles an Envelope sent from a peer on a specific p2p Channel.
|
|
// It will handle errors and any possible panics gracefully. A caller can handle
|
|
// any error returned by sending a PeerError on the respective channel.
|
|
func (r *Reactor) handleMessage(chID p2p.ChannelID, envelope p2p.Envelope) (err error) {
|
|
defer func() {
|
|
if e := recover(); e != nil {
|
|
err = fmt.Errorf("panic in processing message: %v", e)
|
|
r.Logger.Error("recovering from processing message panic", "err", err)
|
|
}
|
|
}()
|
|
|
|
r.Logger.Debug("received message", "message", envelope.Message, "peer", envelope.From)
|
|
|
|
switch chID {
|
|
case BlockchainChannel:
|
|
err = r.handleBlockchainMessage(envelope)
|
|
|
|
default:
|
|
err = fmt.Errorf("unknown channel ID (%d) for envelope (%v)", chID, envelope)
|
|
}
|
|
|
|
return err
|
|
}
|
|
|
|
// processBlockchainCh initiates a blocking process where we listen for and handle
|
|
// envelopes on the BlockchainChannel. Any error encountered during message
|
|
// execution will result in a PeerError being sent on the BlockchainChannel. When
|
|
// the reactor is stopped, we will catch the signal and close the p2p Channel
|
|
// gracefully.
|
|
func (r *Reactor) processBlockchainCh() {
|
|
defer r.blockchainCh.Close()
|
|
|
|
for {
|
|
select {
|
|
case envelope := <-r.blockchainCh.In():
|
|
if err := r.handleMessage(r.blockchainCh.ID(), envelope); err != nil {
|
|
r.Logger.Error("failed to process message", "ch_id", r.blockchainCh.ID(), "envelope", envelope, "err", err)
|
|
r.blockchainCh.Error() <- p2p.PeerError{
|
|
PeerID: envelope.From,
|
|
Err: err,
|
|
Severity: p2p.PeerErrorSeverityLow,
|
|
}
|
|
}
|
|
|
|
case <-r.closeCh:
|
|
r.Logger.Debug("stopped listening on blockchain channel; closing...")
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// processPeerUpdate processes a PeerUpdate.
|
|
func (r *Reactor) processPeerUpdate(peerUpdate p2p.PeerUpdate) {
|
|
r.Logger.Debug("received peer update", "peer", peerUpdate.PeerID, "status", peerUpdate.Status)
|
|
|
|
// XXX: Pool#RedoRequest can sometimes give us an empty peer.
|
|
if len(peerUpdate.PeerID) == 0 {
|
|
return
|
|
}
|
|
|
|
switch peerUpdate.Status {
|
|
case p2p.PeerStatusNew, p2p.PeerStatusUp:
|
|
// send a status update the newly added peer
|
|
r.blockchainCh.Out() <- p2p.Envelope{
|
|
To: peerUpdate.PeerID,
|
|
Message: &bcproto.StatusResponse{
|
|
Base: r.store.Base(),
|
|
Height: r.store.Height(),
|
|
},
|
|
}
|
|
|
|
case p2p.PeerStatusDown, p2p.PeerStatusRemoved, p2p.PeerStatusBanned:
|
|
r.pool.RemovePeer(peerUpdate.PeerID)
|
|
}
|
|
}
|
|
|
|
// processPeerUpdates initiates a blocking process where we listen for and handle
|
|
// PeerUpdate messages. When the reactor is stopped, we will catch the signal and
|
|
// close the p2p PeerUpdatesCh gracefully.
|
|
func (r *Reactor) processPeerUpdates() {
|
|
defer r.peerUpdates.Close()
|
|
|
|
for {
|
|
select {
|
|
case peerUpdate := <-r.peerUpdates.Updates():
|
|
r.processPeerUpdate(peerUpdate)
|
|
|
|
case <-r.closeCh:
|
|
r.Logger.Debug("stopped listening on peer updates channel; closing...")
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// SwitchToFastSync is called by the state sync reactor when switching to fast
|
|
// sync.
|
|
func (r *Reactor) SwitchToFastSync(state sm.State) error {
|
|
r.fastSync = true
|
|
r.initialState = state
|
|
r.pool.height = state.LastBlockHeight + 1
|
|
|
|
if err := r.pool.Start(); err != nil {
|
|
return err
|
|
}
|
|
|
|
r.poolWG.Add(1)
|
|
go r.poolRoutine(true)
|
|
|
|
return nil
|
|
}
|
|
|
|
func (r *Reactor) requestRoutine() {
|
|
statusUpdateTicker := time.NewTicker(statusUpdateIntervalSeconds * time.Second)
|
|
defer statusUpdateTicker.Stop()
|
|
|
|
r.poolWG.Add(1)
|
|
defer r.poolWG.Done()
|
|
|
|
for {
|
|
select {
|
|
case <-r.closeCh:
|
|
return
|
|
|
|
case <-r.pool.Quit():
|
|
return
|
|
|
|
case request := <-r.requestsCh:
|
|
r.blockchainCh.Out() <- p2p.Envelope{
|
|
To: request.PeerID,
|
|
Message: &bcproto.BlockRequest{Height: request.Height},
|
|
}
|
|
|
|
case pErr := <-r.errorsCh:
|
|
r.blockchainCh.Error() <- p2p.PeerError{
|
|
PeerID: pErr.peerID,
|
|
Err: pErr.err,
|
|
Severity: p2p.PeerErrorSeverityLow,
|
|
}
|
|
|
|
case <-statusUpdateTicker.C:
|
|
r.poolWG.Add(1)
|
|
|
|
go func() {
|
|
defer r.poolWG.Done()
|
|
|
|
r.blockchainCh.Out() <- p2p.Envelope{
|
|
Broadcast: true,
|
|
Message: &bcproto.StatusRequest{},
|
|
}
|
|
}()
|
|
}
|
|
}
|
|
}
|
|
|
|
// poolRoutine handles messages from the poolReactor telling the reactor what to
|
|
// do.
|
|
//
|
|
// NOTE: Don't sleep in the FOR_LOOP or otherwise slow it down!
|
|
func (r *Reactor) poolRoutine(stateSynced bool) {
|
|
var (
|
|
trySyncTicker = time.NewTicker(trySyncIntervalMS * time.Millisecond)
|
|
switchToConsensusTicker = time.NewTicker(switchToConsensusIntervalSeconds * time.Second)
|
|
|
|
blocksSynced = uint64(0)
|
|
|
|
chainID = r.initialState.ChainID
|
|
state = r.initialState
|
|
|
|
lastHundred = time.Now()
|
|
lastRate = 0.0
|
|
|
|
didProcessCh = make(chan struct{}, 1)
|
|
)
|
|
|
|
defer trySyncTicker.Stop()
|
|
defer switchToConsensusTicker.Stop()
|
|
|
|
go r.requestRoutine()
|
|
|
|
defer r.poolWG.Done()
|
|
|
|
FOR_LOOP:
|
|
for {
|
|
select {
|
|
case <-switchToConsensusTicker.C:
|
|
var (
|
|
height, numPending, lenRequesters = r.pool.GetStatus()
|
|
lastAdvance = r.pool.LastAdvance()
|
|
)
|
|
|
|
r.Logger.Debug(
|
|
"consensus ticker",
|
|
"num_pending", numPending,
|
|
"total", lenRequesters,
|
|
"height", height,
|
|
)
|
|
|
|
switch {
|
|
case r.pool.IsCaughtUp():
|
|
r.Logger.Info("switching to consensus reactor", "height", height)
|
|
|
|
case time.Since(lastAdvance) > syncTimeout:
|
|
r.Logger.Error("no progress since last advance", "last_advance", lastAdvance)
|
|
|
|
default:
|
|
r.Logger.Info(
|
|
"not caught up yet",
|
|
"height", height,
|
|
"max_peer_height", r.pool.MaxPeerHeight(),
|
|
"timeout_in", syncTimeout-time.Since(lastAdvance),
|
|
)
|
|
continue
|
|
}
|
|
|
|
if err := r.pool.Stop(); err != nil {
|
|
r.Logger.Error("failed to stop pool", "err", err)
|
|
}
|
|
|
|
if r.consReactor != nil {
|
|
r.consReactor.SwitchToConsensus(state, blocksSynced > 0 || stateSynced)
|
|
}
|
|
|
|
break FOR_LOOP
|
|
|
|
case <-trySyncTicker.C:
|
|
select {
|
|
case didProcessCh <- struct{}{}:
|
|
default:
|
|
}
|
|
|
|
case <-didProcessCh:
|
|
// NOTE: It is a subtle mistake to process more than a single block at a
|
|
// time (e.g. 10) here, because we only send one BlockRequest per loop
|
|
// iteration. The ratio mismatch can result in starving of blocks, i.e. a
|
|
// sudden burst of requests and responses, and repeat. Consequently, it is
|
|
// better to split these routines rather than coupling them as it is
|
|
// written here.
|
|
//
|
|
// TODO: Uncouple from request routine.
|
|
|
|
// see if there are any blocks to sync
|
|
first, second := r.pool.PeekTwoBlocks()
|
|
if first == nil || second == nil {
|
|
// we need both to sync the first block
|
|
continue FOR_LOOP
|
|
} else {
|
|
// try again quickly next loop
|
|
didProcessCh <- struct{}{}
|
|
}
|
|
|
|
var (
|
|
firstParts = first.MakePartSet(types.BlockPartSizeBytes)
|
|
firstPartSetHeader = firstParts.Header()
|
|
firstID = types.BlockID{Hash: first.Hash(), PartSetHeader: firstPartSetHeader}
|
|
)
|
|
|
|
// Finally, verify the first block using the second's commit.
|
|
//
|
|
// NOTE: We can probably make this more efficient, but note that calling
|
|
// first.Hash() doesn't verify the tx contents, so MakePartSet() is
|
|
// currently necessary.
|
|
err := state.Validators.VerifyCommitLight(chainID, firstID, first.Height, second.LastCommit)
|
|
if err != nil {
|
|
err = fmt.Errorf("invalid last commit: %w", err)
|
|
r.Logger.Error(
|
|
err.Error(),
|
|
"last_commit", second.LastCommit,
|
|
"block_id", firstID,
|
|
"height", first.Height,
|
|
)
|
|
|
|
// NOTE: We've already removed the peer's request, but we still need
|
|
// to clean up the rest.
|
|
peerID := r.pool.RedoRequest(first.Height)
|
|
r.blockchainCh.Error() <- p2p.PeerError{
|
|
PeerID: peerID,
|
|
Err: err,
|
|
Severity: p2p.PeerErrorSeverityLow,
|
|
}
|
|
|
|
peerID2 := r.pool.RedoRequest(second.Height)
|
|
if peerID2 != peerID {
|
|
r.blockchainCh.Error() <- p2p.PeerError{
|
|
PeerID: peerID2,
|
|
Err: err,
|
|
Severity: p2p.PeerErrorSeverityLow,
|
|
}
|
|
}
|
|
|
|
continue FOR_LOOP
|
|
} else {
|
|
r.pool.PopRequest()
|
|
|
|
// TODO: batch saves so we do not persist to disk every block
|
|
r.store.SaveBlock(first, firstParts, second.LastCommit)
|
|
|
|
var err error
|
|
|
|
// TODO: Same thing for app - but we would need a way to get the hash
|
|
// without persisting the state.
|
|
state, _, err = r.blockExec.ApplyBlock(state, firstID, first)
|
|
if err != nil {
|
|
// TODO: This is bad, are we zombie?
|
|
panic(fmt.Sprintf("failed to process committed block (%d:%X): %v", first.Height, first.Hash(), err))
|
|
}
|
|
|
|
blocksSynced++
|
|
|
|
if blocksSynced%100 == 0 {
|
|
lastRate = 0.9*lastRate + 0.1*(100/time.Since(lastHundred).Seconds())
|
|
r.Logger.Info(
|
|
"fast sync rate",
|
|
"height", r.pool.height,
|
|
"max_peer_height", r.pool.MaxPeerHeight(),
|
|
"blocks/s", lastRate,
|
|
)
|
|
|
|
lastHundred = time.Now()
|
|
}
|
|
}
|
|
|
|
continue FOR_LOOP
|
|
|
|
case <-r.closeCh:
|
|
break FOR_LOOP
|
|
}
|
|
}
|
|
}
|