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579 lines
15 KiB
579 lines
15 KiB
package v2
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import (
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"errors"
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"fmt"
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"time"
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"github.com/tendermint/tendermint/behaviour"
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bc "github.com/tendermint/tendermint/blockchain"
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"github.com/tendermint/tendermint/libs/log"
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tmsync "github.com/tendermint/tendermint/libs/sync"
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"github.com/tendermint/tendermint/p2p"
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bcproto "github.com/tendermint/tendermint/proto/tendermint/blockchain"
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"github.com/tendermint/tendermint/state"
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"github.com/tendermint/tendermint/types"
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)
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const (
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// chBufferSize is the buffer size of all event channels.
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chBufferSize int = 1000
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)
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type blockStore interface {
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LoadBlock(height int64) *types.Block
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SaveBlock(*types.Block, *types.PartSet, *types.Commit)
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Base() int64
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Height() int64
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}
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// BlockchainReactor handles fast sync protocol.
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type BlockchainReactor struct {
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p2p.BaseReactor
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fastSync bool // if true, enable fast sync on start
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stateSynced bool // set to true when SwitchToFastSync is called by state sync
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scheduler *Routine
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processor *Routine
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logger log.Logger
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mtx tmsync.RWMutex
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maxPeerHeight int64
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syncHeight int64
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events chan Event // non-nil during a fast sync
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reporter behaviour.Reporter
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io iIO
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store blockStore
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}
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type blockApplier interface {
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ApplyBlock(state state.State, blockID types.BlockID, block *types.Block) (state.State, int64, error)
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}
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// XXX: unify naming in this package around tmState
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func newReactor(state state.State, store blockStore, reporter behaviour.Reporter,
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blockApplier blockApplier, fastSync bool) *BlockchainReactor {
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initHeight := state.LastBlockHeight + 1
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if initHeight == 1 {
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initHeight = state.InitialHeight
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}
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scheduler := newScheduler(initHeight, time.Now())
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pContext := newProcessorContext(store, blockApplier, state)
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// TODO: Fix naming to just newProcesssor
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// newPcState requires a processorContext
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processor := newPcState(pContext)
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return &BlockchainReactor{
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scheduler: newRoutine("scheduler", scheduler.handle, chBufferSize),
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processor: newRoutine("processor", processor.handle, chBufferSize),
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store: store,
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reporter: reporter,
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logger: log.NewNopLogger(),
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fastSync: fastSync,
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}
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}
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// NewBlockchainReactor creates a new reactor instance.
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func NewBlockchainReactor(
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state state.State,
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blockApplier blockApplier,
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store blockStore,
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fastSync bool) *BlockchainReactor {
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reporter := behaviour.NewMockReporter()
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return newReactor(state, store, reporter, blockApplier, fastSync)
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}
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// SetSwitch implements Reactor interface.
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func (r *BlockchainReactor) SetSwitch(sw *p2p.Switch) {
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r.Switch = sw
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if sw != nil {
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r.io = newSwitchIo(sw)
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} else {
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r.io = nil
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}
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}
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func (r *BlockchainReactor) setMaxPeerHeight(height int64) {
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r.mtx.Lock()
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defer r.mtx.Unlock()
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if height > r.maxPeerHeight {
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r.maxPeerHeight = height
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}
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}
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func (r *BlockchainReactor) setSyncHeight(height int64) {
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r.mtx.Lock()
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defer r.mtx.Unlock()
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r.syncHeight = height
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}
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// SyncHeight returns the height to which the BlockchainReactor has synced.
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func (r *BlockchainReactor) SyncHeight() int64 {
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r.mtx.RLock()
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defer r.mtx.RUnlock()
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return r.syncHeight
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}
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// SetLogger sets the logger of the reactor.
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func (r *BlockchainReactor) SetLogger(logger log.Logger) {
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r.logger = logger
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r.scheduler.setLogger(logger)
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r.processor.setLogger(logger)
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}
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// Start implements cmn.Service interface
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func (r *BlockchainReactor) Start() error {
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r.reporter = behaviour.NewSwitchReporter(r.BaseReactor.Switch)
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if r.fastSync {
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err := r.startSync(nil)
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if err != nil {
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return fmt.Errorf("failed to start fast sync: %w", err)
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}
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}
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return nil
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}
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// startSync begins a fast sync, signalled by r.events being non-nil. If state is non-nil,
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// the scheduler and processor is updated with this state on startup.
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func (r *BlockchainReactor) startSync(state *state.State) error {
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r.mtx.Lock()
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defer r.mtx.Unlock()
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if r.events != nil {
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return errors.New("fast sync already in progress")
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}
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r.events = make(chan Event, chBufferSize)
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go r.scheduler.start()
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go r.processor.start()
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if state != nil {
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<-r.scheduler.ready()
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<-r.processor.ready()
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r.scheduler.send(bcResetState{state: *state})
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r.processor.send(bcResetState{state: *state})
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}
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go r.demux(r.events)
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return nil
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}
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// endSync ends a fast sync
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func (r *BlockchainReactor) endSync() {
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r.mtx.Lock()
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defer r.mtx.Unlock()
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if r.events != nil {
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close(r.events)
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}
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r.events = nil
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r.scheduler.stop()
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r.processor.stop()
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}
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// SwitchToFastSync is called by the state sync reactor when switching to fast sync.
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func (r *BlockchainReactor) SwitchToFastSync(state state.State) error {
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r.stateSynced = true
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state = state.Copy()
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return r.startSync(&state)
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}
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// reactor generated ticker events:
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// ticker for cleaning peers
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type rTryPrunePeer struct {
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priorityHigh
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time time.Time
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}
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func (e rTryPrunePeer) String() string {
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return fmt.Sprintf("rTryPrunePeer{%v}", e.time)
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}
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// ticker event for scheduling block requests
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type rTrySchedule struct {
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priorityHigh
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time time.Time
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}
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func (e rTrySchedule) String() string {
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return fmt.Sprintf("rTrySchedule{%v}", e.time)
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}
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// ticker for block processing
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type rProcessBlock struct {
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priorityNormal
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}
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func (e rProcessBlock) String() string {
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return "rProcessBlock"
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}
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// reactor generated events based on blockchain related messages from peers:
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// blockResponse message received from a peer
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type bcBlockResponse struct {
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priorityNormal
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time time.Time
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peerID p2p.ID
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size int64
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block *types.Block
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}
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func (resp bcBlockResponse) String() string {
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return fmt.Sprintf("bcBlockResponse{%d#%X (size: %d bytes) from %v at %v}",
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resp.block.Height, resp.block.Hash(), resp.size, resp.peerID, resp.time)
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}
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// blockNoResponse message received from a peer
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type bcNoBlockResponse struct {
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priorityNormal
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time time.Time
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peerID p2p.ID
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height int64
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}
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func (resp bcNoBlockResponse) String() string {
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return fmt.Sprintf("bcNoBlockResponse{%v has no block at height %d at %v}",
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resp.peerID, resp.height, resp.time)
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}
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// statusResponse message received from a peer
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type bcStatusResponse struct {
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priorityNormal
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time time.Time
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peerID p2p.ID
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base int64
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height int64
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}
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func (resp bcStatusResponse) String() string {
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return fmt.Sprintf("bcStatusResponse{%v is at height %d (base: %d) at %v}",
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resp.peerID, resp.height, resp.base, resp.time)
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}
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// new peer is connected
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type bcAddNewPeer struct {
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priorityNormal
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peerID p2p.ID
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}
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func (resp bcAddNewPeer) String() string {
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return fmt.Sprintf("bcAddNewPeer{%v}", resp.peerID)
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}
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// existing peer is removed
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type bcRemovePeer struct {
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priorityHigh
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peerID p2p.ID
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reason interface{}
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}
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func (resp bcRemovePeer) String() string {
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return fmt.Sprintf("bcRemovePeer{%v due to %v}", resp.peerID, resp.reason)
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}
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// resets the scheduler and processor state, e.g. following a switch from state syncing
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type bcResetState struct {
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priorityHigh
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state state.State
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}
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func (e bcResetState) String() string {
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return fmt.Sprintf("bcResetState{%v}", e.state)
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}
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// Takes the channel as a parameter to avoid race conditions on r.events.
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func (r *BlockchainReactor) demux(events <-chan Event) {
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var lastRate = 0.0
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var lastHundred = time.Now()
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var (
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processBlockFreq = 20 * time.Millisecond
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doProcessBlockCh = make(chan struct{}, 1)
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doProcessBlockTk = time.NewTicker(processBlockFreq)
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)
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defer doProcessBlockTk.Stop()
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var (
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prunePeerFreq = 1 * time.Second
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doPrunePeerCh = make(chan struct{}, 1)
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doPrunePeerTk = time.NewTicker(prunePeerFreq)
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)
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defer doPrunePeerTk.Stop()
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var (
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scheduleFreq = 20 * time.Millisecond
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doScheduleCh = make(chan struct{}, 1)
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doScheduleTk = time.NewTicker(scheduleFreq)
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)
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defer doScheduleTk.Stop()
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var (
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statusFreq = 10 * time.Second
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doStatusCh = make(chan struct{}, 1)
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doStatusTk = time.NewTicker(statusFreq)
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)
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defer doStatusTk.Stop()
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doStatusCh <- struct{}{} // immediately broadcast to get status of existing peers
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// Memoize the scSchedulerFail error to avoid printing it every scheduleFreq.
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var scSchedulerFailErr error
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// XXX: Extract timers to make testing atemporal
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for {
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select {
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// Pacers: send at most per frequency but don't saturate
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case <-doProcessBlockTk.C:
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select {
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case doProcessBlockCh <- struct{}{}:
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default:
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}
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case <-doPrunePeerTk.C:
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select {
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case doPrunePeerCh <- struct{}{}:
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default:
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}
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case <-doScheduleTk.C:
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select {
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case doScheduleCh <- struct{}{}:
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default:
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}
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case <-doStatusTk.C:
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select {
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case doStatusCh <- struct{}{}:
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default:
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}
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// Tickers: perform tasks periodically
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case <-doScheduleCh:
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r.scheduler.send(rTrySchedule{time: time.Now()})
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case <-doPrunePeerCh:
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r.scheduler.send(rTryPrunePeer{time: time.Now()})
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case <-doProcessBlockCh:
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r.processor.send(rProcessBlock{})
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case <-doStatusCh:
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if err := r.io.broadcastStatusRequest(); err != nil {
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r.logger.Error("Error broadcasting status request", "err", err)
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}
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// Events from peers. Closing the channel signals event loop termination.
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case event, ok := <-events:
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if !ok {
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r.logger.Info("Stopping event processing")
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return
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}
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switch event := event.(type) {
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case bcStatusResponse:
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r.setMaxPeerHeight(event.height)
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r.scheduler.send(event)
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case bcAddNewPeer, bcRemovePeer, bcBlockResponse, bcNoBlockResponse:
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r.scheduler.send(event)
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default:
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r.logger.Error("Received unexpected event", "event", fmt.Sprintf("%T", event))
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}
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// Incremental events from scheduler
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case event := <-r.scheduler.next():
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switch event := event.(type) {
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case scBlockReceived:
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r.processor.send(event)
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case scPeerError:
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r.processor.send(event)
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if err := r.reporter.Report(behaviour.BadMessage(event.peerID, "scPeerError")); err != nil {
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r.logger.Error("Error reporting peer", "err", err)
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}
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case scBlockRequest:
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peer := r.Switch.Peers().Get(event.peerID)
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if peer == nil {
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r.logger.Error("Wanted to send block request, but no such peer", "peerID", event.peerID)
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continue
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}
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if err := r.io.sendBlockRequest(peer, event.height); err != nil {
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r.logger.Error("Error sending block request", "err", err)
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}
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case scFinishedEv:
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r.processor.send(event)
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r.scheduler.stop()
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case scSchedulerFail:
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if scSchedulerFailErr != event.reason {
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r.logger.Error("Scheduler failure", "err", event.reason.Error())
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scSchedulerFailErr = event.reason
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}
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case scPeersPruned:
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// Remove peers from the processor.
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for _, peerID := range event.peers {
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r.processor.send(scPeerError{peerID: peerID, reason: errors.New("peer was pruned")})
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}
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r.logger.Debug("Pruned peers", "count", len(event.peers))
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case noOpEvent:
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default:
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r.logger.Error("Received unexpected scheduler event", "event", fmt.Sprintf("%T", event))
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}
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// Incremental events from processor
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case event := <-r.processor.next():
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switch event := event.(type) {
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case pcBlockProcessed:
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r.setSyncHeight(event.height)
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if r.syncHeight%100 == 0 {
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lastRate = 0.9*lastRate + 0.1*(100/time.Since(lastHundred).Seconds())
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r.logger.Info("Fast Sync Rate", "height", r.syncHeight,
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"max_peer_height", r.maxPeerHeight, "blocks/s", lastRate)
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lastHundred = time.Now()
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}
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r.scheduler.send(event)
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case pcBlockVerificationFailure:
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r.scheduler.send(event)
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case pcFinished:
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r.logger.Info("Fast sync complete, switching to consensus")
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if !r.io.trySwitchToConsensus(event.tmState, event.blocksSynced > 0 || r.stateSynced) {
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r.logger.Error("Failed to switch to consensus reactor")
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}
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r.endSync()
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return
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case noOpEvent:
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default:
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r.logger.Error("Received unexpected processor event", "event", fmt.Sprintf("%T", event))
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}
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// Terminal event from scheduler
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case err := <-r.scheduler.final():
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switch err {
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case nil:
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r.logger.Info("Scheduler stopped")
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default:
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r.logger.Error("Scheduler aborted with error", "err", err)
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}
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// Terminal event from processor
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case err := <-r.processor.final():
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switch err {
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case nil:
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r.logger.Info("Processor stopped")
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default:
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r.logger.Error("Processor aborted with error", "err", err)
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}
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}
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}
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}
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|
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// Stop implements cmn.Service interface.
|
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func (r *BlockchainReactor) Stop() error {
|
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r.logger.Info("reactor stopping")
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r.endSync()
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r.logger.Info("reactor stopped")
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return nil
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}
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|
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// Receive implements Reactor by handling different message types.
|
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// XXX: do not call any methods that can block or incur heavy processing.
|
|
// https://github.com/tendermint/tendermint/issues/2888
|
|
func (r *BlockchainReactor) Receive(chID byte, src p2p.Peer, msgBytes []byte) {
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logger := r.logger.With("src", src.ID(), "chID", chID)
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|
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msg, err := bc.DecodeMsg(msgBytes)
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if err != nil {
|
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logger.Error("error decoding message", "err", err)
|
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_ = r.reporter.Report(behaviour.BadMessage(src.ID(), err.Error()))
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return
|
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}
|
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|
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if err = bc.ValidateMsg(msg); err != nil {
|
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logger.Error("peer sent us invalid msg", "msg", msg, "err", err)
|
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_ = r.reporter.Report(behaviour.BadMessage(src.ID(), err.Error()))
|
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return
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}
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|
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r.logger.Debug("Receive", "msg", msg)
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|
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switch msg := msg.(type) {
|
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case *bcproto.StatusRequest:
|
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if err := r.io.sendStatusResponse(r.store.Base(), r.store.Height(), src); err != nil {
|
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logger.Error("Could not send status message to src peer")
|
|
}
|
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|
|
case *bcproto.BlockRequest:
|
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block := r.store.LoadBlock(msg.Height)
|
|
if block != nil {
|
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if err = r.io.sendBlockToPeer(block, src); err != nil {
|
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logger.Error("Could not send block message to src peer", "err", err)
|
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}
|
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} else {
|
|
logger.Info("peer asking for a block we don't have", "height", msg.Height)
|
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if err = r.io.sendBlockNotFound(msg.Height, src); err != nil {
|
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logger.Error("Couldn't send block not found msg", "err", err)
|
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}
|
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}
|
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|
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case *bcproto.StatusResponse:
|
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r.mtx.RLock()
|
|
if r.events != nil {
|
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r.events <- bcStatusResponse{peerID: src.ID(), base: msg.Base, height: msg.Height}
|
|
}
|
|
r.mtx.RUnlock()
|
|
|
|
case *bcproto.BlockResponse:
|
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r.mtx.RLock()
|
|
bi, err := types.BlockFromProto(msg.Block)
|
|
if err != nil {
|
|
logger.Error("error transitioning block from protobuf", "err", err)
|
|
_ = r.reporter.Report(behaviour.BadMessage(src.ID(), err.Error()))
|
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return
|
|
}
|
|
if r.events != nil {
|
|
r.events <- bcBlockResponse{
|
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peerID: src.ID(),
|
|
block: bi,
|
|
size: int64(len(msgBytes)),
|
|
time: time.Now(),
|
|
}
|
|
}
|
|
r.mtx.RUnlock()
|
|
|
|
case *bcproto.NoBlockResponse:
|
|
r.mtx.RLock()
|
|
if r.events != nil {
|
|
r.events <- bcNoBlockResponse{peerID: src.ID(), height: msg.Height, time: time.Now()}
|
|
}
|
|
r.mtx.RUnlock()
|
|
}
|
|
}
|
|
|
|
// AddPeer implements Reactor interface
|
|
func (r *BlockchainReactor) AddPeer(peer p2p.Peer) {
|
|
err := r.io.sendStatusResponse(r.store.Base(), r.store.Height(), peer)
|
|
if err != nil {
|
|
r.logger.Error("could not send our status to the new peer", "peer", peer.ID, "err", err)
|
|
}
|
|
|
|
err = r.io.sendStatusRequest(peer)
|
|
if err != nil {
|
|
r.logger.Error("could not send status request to the new peer", "peer", peer.ID, "err", err)
|
|
}
|
|
|
|
r.mtx.RLock()
|
|
defer r.mtx.RUnlock()
|
|
if r.events != nil {
|
|
r.events <- bcAddNewPeer{peerID: peer.ID()}
|
|
}
|
|
}
|
|
|
|
// RemovePeer implements Reactor interface.
|
|
func (r *BlockchainReactor) RemovePeer(peer p2p.Peer, reason interface{}) {
|
|
r.mtx.RLock()
|
|
defer r.mtx.RUnlock()
|
|
if r.events != nil {
|
|
r.events <- bcRemovePeer{
|
|
peerID: peer.ID(),
|
|
reason: reason,
|
|
}
|
|
}
|
|
}
|
|
|
|
// GetChannels implements Reactor
|
|
func (r *BlockchainReactor) GetChannels() []*p2p.ChannelDescriptor {
|
|
return []*p2p.ChannelDescriptor{
|
|
{
|
|
ID: BlockchainChannel,
|
|
Priority: 10,
|
|
SendQueueCapacity: 2000,
|
|
RecvBufferCapacity: 50 * 4096,
|
|
RecvMessageCapacity: bc.MaxMsgSize,
|
|
},
|
|
}
|
|
}
|